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Publication numberCN102761511 A
Publication typeApplication
Application numberCN 201210212679
Publication date31 Oct 2012
Filing date7 Mar 2003
Priority date8 Mar 2002
Also published asCA2475442A1, CA2475442C, CA2743822A1, CA2743822C, CN1640033A, CN101083510A, CN101083510B, CN102075286A, CN102075286B, CN102761511B, CN104283832A, CN104980974A, EP1483857A1, EP1483857A4, EP2096784A1, EP2385665A1, EP2385666A1, US7522514, US7590071, US7729281, US7804765, US7916625, US7924841, US7944851, US8159969, US8284800, US8416677, US8537703, US8553579, US8755264, US8842570, US8958350, US9148801, US9148806, US9450794, US9461857, US20040047296, US20080049601, US20090225817, US20090268832, US20090274061, US20090296614, US20100098039, US20100220725, US20100322295, US20110080857, US20110211477, US20120069877, US20130003587, US20130202017, US20130286943, US20140036711, US20140334323, US20150003274, US20150009855, US20160373945, US20160373969, WO2003077457A1
Publication number201210212679.1, CN 102761511 A, CN 102761511A, CN 201210212679, CN-A-102761511, CN102761511 A, CN102761511A, CN201210212679, CN201210212679.1
InventorsC兰齐, D李, MC察内斯, T库克利夫
Applicant艾威尔公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Systems and methods for high rate ofdm communications using first and second cyclic prefix lengths
CN 102761511 A
Abstract
Messages transmitted between a receiver (150) and a transmitter (240) are used to maximize a communication data rate. In particular, a multicarrier modulation system uses messages that are sent from the receiver to the transmitter to exchange one or more sets of optimized communication parameters. The transmitter then stores these communication parameters and when transmitting to that particular receiver, the transmitter utilizes the stored parameters in an effort to maximize the data rate to that receiver. Likewise, when the receiver receives packets from that particular transmitter, the receiver can utilize the stored communication parameters for reception.
Claims(19)  translated from Chinese
1. 一种用于数据分组传输的OFDM收发机,包括: 能够发送数据分组的发射机, 其中: 所述收发机能够使用一组通信参数发送第一数据分组,并且使用新的通信参数发送随后的数据分组,其中所述新的通信参数至少包括循环前缀长度或导频音分配以实现数据传输速率的改变。 1. A method for data packet transmission OFDM transceiver comprising: a transmitter capable of transmitting data packets, wherein: the transceiver to use a set of communication parameters transmitted first data packets, and using the new communication parameters transmitted subsequently The data packet, wherein the new communication parameters include at least a cyclic prefix length or pilot tones allocated for data transmission rate changes.
2. 一种用于数据分组接收的OFDM收发机,包括: 能够接收数据分组的接收机, 其中所述收发机能够使用一组通信参数接收第一数据分组,并且使用新的通信参数接收随后的数据分组,其中所述新的通信参数至少包括循环前缀长度或导频音分配以实现数据传输速率的改变。 2. A data packet received OFDM transceiver comprising: a receiver capable of receiving data packets, wherein the transceiver is able to use one set of communication parameters to receive a first data packet, and uses a new communication parameter receiving subsequent data packet, wherein the new communication parameters include at least a cyclic prefix length or pilot tones assigned for data transmission rate changes.
3.根据前述权利要求的任一项所述的收发机,其中所述循环前缀长度和/或导频音分配在报头字段中表示。 According to any one of the preceding claims wherein the transceiver, wherein the cyclic prefix length and / or pilot tones assigned in said header field.
4.根据前述权利要求的任一项所述的收发机,其中所述收发机包括ASIC。 According to any one of the preceding claims wherein the transceiver, wherein the transceiver comprises a ASIC.
5.根据前述权利要求的任一项所述的收发机,其中所述收发机包括数字信号处理器。 According to any one of the preceding claims wherein the transceiver, wherein the transceiver includes a digital signal processor.
6.根据前述权利要求的任一项所述的收发机,其中数据分组使用标准通信参数以第一传输速率从第一收发机发送至第二收发机。 According to any one of the preceding claims, wherein the transceiver, wherein the data packet using the standard communication parameters to a first transmission rate from the first transceiver to the second transceiver.
7.根据前述权利要求的任一项所述的收发机,其中所述收发机是接入点。 According to any one of the preceding claims wherein the transceiver, wherein the transceiver is an access point.
8.根据前述权利要求的任一项所述的收发机,其中所述收发机是传统收发机,其中仅执行802. lla/g标准的收发机是传统收发机。 According to any one of the preceding claims wherein the transceiver, wherein the transceiver is a conventional transceiver, which performs only 802. lla / g standard transceiver is a conventional transceiver.
9.根据前述权利要求的任一项所述的收发机,其中表示循环前缀长度和/或导频音分配的报头字段是扩展报头字段。 According to any one of the preceding claims, wherein the transceiver, which is the cyclic prefix length and / or header fields are assigned pilot tones extension header field.
10.根据前述权利要求的任一项所述的收发机,其中所述收发机能够发送或接收包含新的通信参数的消息,以用于发送或接收随后数据分组,其中所述消息是数据帧或管理帧或确认数据分组。 According to any one of the preceding claims wherein the transceiver, wherein the transceiver is capable of sending or receiving a communication parameter contains the new message, for transmitting or receiving the subsequent data packet, wherein said message is a data frame or management frames or acknowledgment data packet.
11. 一种OFDM收发机中的数据分组发送或接收的方法,其中数据分组被发送或接收, 其中使用一组通信参数发送或接收第一数据分组,并且使用新的通信参数发送或接收随后的数据分组,其中所述新的通信参数包括至少循环前缀长度或导频音分配以实现数据传输速率的改变。 11. A data packet OFDM transceiver transmitting or receiving method, wherein the data packet is sent or received, in which a set of communication parameters to send or receive a first data packet, and the new communication parameters sent or received subsequent data packet, wherein the new communication parameters include at least a cyclic prefix length or pilot tones assigned for data transmission rate changes.
12.根据权利要求11所述的方法,其中所述循环前缀长度和/或导频音分配在报头字段中表示。 12. The method of claim 11, wherein the cyclic prefix length and / or pilot tones assigned in said header field.
13.根据权利要求11所述的方法,其中所述收发机包括ASIC。 13. The method of claim 11, wherein said transceiver includes ASIC.
14.根据权利要求11所述的方法,其中所述收发机包括数字信号处理器。 14. The method of claim 11, wherein said transceiver includes a digital signal processor.
15.根据权利要求11所述的方法,其中数据分组使用标准通信参数以第一传输速率从第一收发机发送至第二收发机。 15. The method of claim 11, wherein the data packet using the standard communication parameters to a first transmission rate from the first transceiver to the second transceiver.
16.根据权利要求11所述的方法,其中通信收发机是接入点。 16. The method of claim 11, wherein the communication transceiver is the access point.
17.根据权利要求11所述的方法,其中所述收发机包括收发机,所述收发机是传统收发机,其中仅执行802. lla/g标准的收发机是传统收发机。 17. The method of claim 11, wherein the transceiver includes a transceiver, the transceiver is a conventional transceiver, which performs only 802. lla / g standard transceiver is a conventional transceiver.
18.根据权利要求11所述的方法,其中表示循环前缀长度和/或导频音分配的报头字段是扩展报头字段。 18. The method according to claim 11, wherein represents a cyclic prefix length and / or header fields are assigned pilot tones extension header field.
19.根据权利要求11所述的方法,其中收发机适用于发送或接收包含新的通信参数的消息,以用于发送或接收随后数据分组,其中所述消息是数据帧或管理帧或确认数据分组。 19. The method according to claim 11, wherein the transceiver is adapted to send or receive a communication parameter contains the new message, for transmitting or receiving the subsequent data packet, wherein said message is a data frame or management frame or acknowledgment data grouping.
Description  translated from Chinese

用于高速率正交频分复用通信的系统和方法 For high rate systems and orthogonal frequency division multiplexing communication method of

[0001] 本案为分案申请,原案的申请号为:03805540.6,原案的申请日为:2003年3月7日,原案的发明名称为:用于高速率正交频分复用通信的系统和方法。 [0001] This is a divisional application, the original bill's application number: 03805540.6, filed the original bill as follows: March 7, 2003, the original bill for the title of the invention: a high rate Orthogonal frequency-division multiplexing systems and communications Methods.

[0002] 相关的申请数据 [0002] the relevant application data

[0003] 本申请要求根据35 USC 119(e),在2002年3月8日申请的美国专利申请序列号No. 60/363,218的,称作“用于无线局域网的高速率OFDM通信系统和方法(High RateOFDM Communication System and Method for Wireless LAN)”的权益和优先权,其被作为参考资料完整地结合在此处。 [0003] This application claims priority based on 35 USC 119 (e), in U.S. Patent March 8, 2002 Application Serial No. No. 60 / 363,218, called "high rate OFDM communications for wireless local area network System and method (High RateOFDM Communication System and Method for Wireless LAN) "interests and priorities, which are fully incorporated by reference herein.

技术领域 FIELD

[0004] 本发明的系统和方法通常涉及通信系统。 [0004] The system and method of the present invention generally relates to communication systems. 更确切地说,本发明的系统和方法涉及正交频分复用(OFDM)通信系统、方法和协议。 More precisely, the system and method of the present invention relates to an orthogonal frequency division multiplexing (OFDM) communication systems, methods and protocols.

背景技术 BACKGROUND

[0005] 用于无线局域网的IEEE802. Ila和802. Ilg标准作为参考资料完整地结合在此处,在下文中被称为803. lla/g,规定无线局域网通信系统在5GHz和2. 4GHz频带中。 [0005] for wireless LAN IEEE802. Ila and 802. Ilg standard complete incorporated by reference herein, hereinafter referred to as 803. lla / g, specified in the 5GHz wireless LAN communication system and 2. 4GHz frequency band . 这些标准指定使用OFDM作为用于通信的调制方法。 These standards specify the use of OFDM as the modulation method for communication. OFDM是一种适宜在无线通信信道中实施的多载波调制方案。 OFDM is a multicarrier modulation scheme in a wireless communication channel suitable embodiment. 802. lla/g标准提供6、9、12、18、24、36、48和54 Mbps的数据传输速率。 802. lla / g standards provide 6,9,12,18,24,36,48 and data transfer rates up to 54 Mbps. 不同的数据传输速率是通过在多载波系统中在所有载波上发送不同但恒定数目的位和通过以不同的编码速率操作来实现的。 Different data rates are transmitted by all carriers in a multicarrier system different but constant number of bits and different encoding rates by the operation to achieve. 在下面表I示出了对于一个示范的802. lla/g收发机用于每个数据传输速率的编码速率和每个副载波的位。 In the following Table I shows the bit for an exemplary 802. lla / g transceiver for encoding rate for each data transmission rate of each subcarrier.

^数据传输速率编码速率 每个副载波的位 ^ Bit data transfer rate of the encoding rate for each subcarrier

(Mbps)__GO__(N—BPSC ) (Mbps) __ GO __ (N-BPSC)

6—1/2 I 6-1 / 2 I

" 9 3/4 I _ "9 3/4 I _

「 Ί 12 172 2 "Ί 12 172 2

[0006 ]----- [0006] -----

_18__3/4__2_ _18__3 / 4__2_

— 24 1/2 4 _ - 24 1/2 4 _

' 36 — 3/4 4 — '36 - 3/4 4 -

— 48 2/3 6 54 3/4 6 - 48 2/3 654 3/4 6

[0007]表 I [0007] Table I

[0008] 为了确定适宜的发送数据传输速率,802. lla/g发射机使用以不同的数据传输速率发射的试错法,例如,从最高的或者上一次成功的传输速率开始,并且等待来自接收机肯定的确认指示,即该数据分组被成功地接收。 [0008] In order to determine the appropriate transmission data rates, 802. Lla / g transmitters used to transmit a different data transmission rate of trial and error, for example, from the top or the last successful transmission rate begins, and waits from the reception Machine positive acknowledgment indicating that the data packet is successfully received. 这种简单的肯定的确认指示方法被用于在基于常规的802. Ila的无线系统中优化通信。 This simple positive acknowledgment indication method is used to optimize a communication in a wireless system based on conventional 802. Ila's. 发明内容 SUMMARY

[0009] 本发明示范的系统和方法使用在接收机和发射机之间发送的消息来最大化通信数据传输速率。 [0009] The exemplary systems and methods of the present invention is used in messages sent between the receiver and the transmitter to maximize the communication data transfer rate. 尤其是,根据本发明示范的实施例,一种多载波调制系统使用从接收机发送给发射机的消息,去交换最优化的通信参数。 In particular, according to an exemplary embodiment of the present invention, a multi-carrier modulation system using a transmission from the receiver to the transmitter of the message, to exchange communication parameters optimized. 然后,发射机存储这些通信参数,并且当发送给特定的接收机的时候,该发射机利用存储的参数致力于最大化对该接收机的数据传输速率。 Then, the transmitter stores these communication parameters and when transmitting to a specific receiver, the transmitter using the stored parameters dedicated to maximize the data transfer rate of the receiver. 同样地,当接收机从特定的发射机接收数据分组的时候,接收机可以利用存储的通信参数用于接收。 Likewise, when the receiver receives data packets from a particular transmitter, the receiver can use the stored communication parameters for reception.

[0010] 因此,本发明的多个方面涉及多载波调制通信系统。 [0010] Accordingly, aspects of the present invention relates to a multicarrier modulation communication system.

[0011] 本发明涉及一种用于数据分组传输的OFDM收发机,包括:能够发送数据分组的发射机,其中:所述收发机能够使用一组通信参数发送第一数据分组,并且使用新的通信参数发送随后的数据分组,其中所述新的通信参数至少包括循环前缀长度或导频音分配以实现数据传输速率的改变。 [0011] The present invention relates to an OFDM transceiver for data packet transmission, comprising: a transmitter capable of transmitting data packets, wherein: the transceiver is able to use a set of communication parameters transmitted first data packets, and uses the new communication parameters subsequent data packet transmission, wherein the new communication parameters include at least a cyclic prefix length or pilot tones allocated for data transmission rate changes. [0012] 本发明的额外的方面涉及在收发机之间发送消息的有线或者无线多载波调制通信系统。 [0012] Additional aspects of the invention relates to a message sent between the transceiver wired or wireless multicarrier modulation communication system.

[0013] 本发明额外的方面涉及在多个收发机之间发送消息,以致力于最优化数据通信速率。 Additional aspects [0013] The present invention relates to send messages between a plurality of transceivers, in an effort to optimize the data communication rate.

[0014] 本发明进一步的方面涉及在多载波调制系统中的多个接收机之间交换最优化的通信参数。 A further aspect [0014] The present invention relates to a multi-carrier modulation system switching between a plurality of receivers optimized communication parameters.

[0015] 本发明额外的方面涉及在有线或者无线多载波调制通信网络中的多个收发机之间交换通信参数,以在收发机之间调节数据传输速率。 Exchanging between communication parameters involved in a wired or wireless multicarrier modulation in a communication network a plurality of transceivers Additional aspects [0015] The present invention, in order to adjust the data between the transceiver transfer rate.

[0016] 本发明的这些和其他的特点及优点在以下实施例的详细说明中加以描述或者从其中清晰可见的。 [0016] These and other features and advantages are described in the following detailed description of embodiments of the invention, or from which the visible.

附图说明 Brief Description

[0017] 参考下列附图将详细描述本发明的实施例,其中: Embodiments of the present invention [0017] will be described in detail with reference to the following drawings, wherein:

[0018] 图I为根据本发明的一示范的通信系统的功能方框图; [0018] Figure I is a functional block diagram of an exemplary communication system according to the present invention;

[0019] 图2为根据本发明的第一和第二收发机部件的功能方框图; [0019] Figure 2 is a functional block diagram of a first member and a second transceiver of the present invention;

[0020] 图3为根据本发明的一示范的通信方法的流程图; [0020] FIG. 3 is a flowchart of an exemplary communication method according to the present invention;

[0021] 图4为根据本发明的一示范的扩展的信号字段; [0021] Figure 4 is an exemplary extended signal field in accordance with the present invention;

[0022] 图5为根据本发明的第两个示范的通信系统;及 [0022] FIG. 5 is an exemplary communication system according to the first two of the present invention; and

[0023] 图6为根据本发明的第两个示范的实施例的示范的收发机。 [0023] FIG. 6 is a section according to an exemplary embodiment of the present invention two exemplary transceiver.

具体实施方式 DETAILED DESCRIPTION

[0024] 下面将相关于多载波调制通信系统描述本发明示范的系统和方法。 [0024] will be associated with a multicarrier modulation communication system of the present invention is a system and method described exemplary. 但是,为了使本发明更加清晰,以下的描述省略公知的结构和设备,其可以以方框图形式或者别的方式概括来示出。 However, in order to make the present invention clearer, the following description omits well-known structures and devices, which can be in block diagram form or otherwise summarized be shown. 为了解释的目的,许多的特定细节被阐述,以便提供对本发明彻底的了解。 For purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. 但是应该理解,除了在此处专门详细阐述的之外,可以以各种方法实践本发明。 It should be understood that in addition here specially elaborated, can practice the invention in various ways. 例如,本发明的系统和方法通常可以被应用于任何类型的通信系统,包括有线通信系统、无线通信系统,诸如无线局域网、输电线通信系统、有线或者无线电话线路通信系统,或者其任意的组合。 For example, the system and method of the present invention can be generally applied to any type of communication system, including a wired communication system, a wireless communication system, a combination such as a wireless LAN, power line communication system, wired or wireless telephone line communication systems, or any of the .

[0025] 此外,虽然在此处说明的示范的实施例显示了该通信系统配置的各种各样的部件,应该理解,该系统的各种部件可以被设置在分布式网络的远距离的部分上,诸如远程通信网和/或互联网,或者在专用的多载波调制系统内。 [0025] Further, although the embodiments illustrated herein show a variety of exemplary communication components of the system configuration, it should be understood that various components of the system may be provided in the portion of a distributed network of remote on, such as a telecommunications network and / or the Internet, or within a dedicated multi-carrier modulation system. 因此,应该理解,该通信系统的部件可以结合成一个或多个设备,或者配置在分布式网络的特定的节点上,诸如远程通信网。 Therefore, it should be understood that the communication system components may be combined into one or more devices, or configured on a particular node of a distributed network, such as a telecommunications network. 从以下的描述中将理解,出于对计算效率的考虑,该通信系统的部件可以被布置在分布式网络内的任何位置上,而不影响该系统的操作。 Will be understood from the following description, out of consideration of computational efficiency, the components of the communication system may be arranged at any location within a distributed network without affecting the operation of the system.

[0026] 此外,应该理解,连接这些单元的各种各样的链路可以是有线或者无线链路,或者其任意的组合,或者任何其它已知的或者稍后开发的单元,该单元能够提供和/或交换信息出入这些连接的单元。 [0026] In addition, it should be understood that various links connecting the elements can be wired or wireless links, or any combination thereof, or any other known or later developed unit which can provide and / or exchange of information out of the connection elements. 另外,在此处使用的该术语模块可以涉及任何已知的或者稍后开发的硬件、软件或者硬件和软件的组合,其能够执行与那个单元有关的功能。 Further, the term module as used herein may relate to any combination of known or later developed hardware and software, software, or hardware, capable of performing the functions associated with that unit.

[0027] 另外,虽然将相关于多载波调制系统描述本发明,本发明的系统和方法可以应用在任何的通信系统或者用于发送信息的传输协议。 [0027] Further, although the system associated with the multicarrier modulation described in the present invention, systems and methods of the present invention can be applied to any communication system or transmission protocol for transmitting information.

[0028] 图I示出了一个示范的通信系统I。 [0028] Figure I shows an exemplary communication system I. 通信系统I包含一个或多个基站10和一个接入点(AP)20。 Communication system I includes one or more base station 10 and an access point (AP) 20. 这个示范的实施例示出了一个无线局域网,其中多个基站10与接入点20通信。 This exemplary embodiment shows a wireless local area network, wherein the plurality of base stations 20 communicate with the access point 10. 尤其是,在其示范的无线局域网中,多个基站10共享一个公共的通信介质。 In particular, in its exemplary wireless LAN, a plurality of base station 10 share a common communication medium. 一种可能的配置包括一个用于基站10 (BSS)之间通信的接入点20。 One possible configuration includes an access point for communication between the base station 10 (BSS) 20. 接入点20在基站10之间,及例如给其它的有线和/或无线网络(未示出)提供本地中继功能。 The access point 20 between the base station 10, and for example, to other wired and / or wireless network (not shown) to provide local relay function. 因此,当基站I与基站2通信的时候,该通信(例如,数据分组)是从基站I发送给接入点20,然后从接入点20到基站2。 Thus, when the base station 2 communicating with a base station I, the communication (e.g., data packets) are sent from the base station I to the access point 20, and from the access point 20 to the base station 2. 由于这个缘故,在大多数情况下,基站10仅发送数据分组给接入点20,和从接入点20接收数据分组。 For this reason, in most cases, only the base station 10 transmits data packets to the access point 20, and receives data packets from the access point 20. 另一方面,接入点20必须与该网络中所有的基站10通信。 On the other hand, the access point 20 must communicate with all base stations in the network 10.

[0029] 另一个可能的配置不依靠接入点20,而是代之以直接在该网络中的基站10(IBSS)之间进行通信,在图I中以虚线表示。 [0029] Another possible configuration does not depend on the access point 20, but instead between the base station 10 (IBSS) in the network to communicate directly, in Fig. I, shown in dashed lines. 在这个实施例中,直接在基站10之间发生通信,不存在由接入点20提供的中继功能。 In this embodiment, the communication occurs directly between the base station 10, there is no relay function provided by the access point 20.

[0030] 根据本发明示范的实施例,该无线网络依靠在多个收发机之间交换参数,尤其是从接收机到发射机。 [0030] According to an exemplary embodiment of the present invention, the wireless network rely on the exchange of parameters between a plurality of transceivers, in particular, from the receiver to the transmitter. 这些参数被存储在发射机上,并且被用于随后传送数据分组到该参数来源于的接收机。 These parameters are stored in the transmitter, and is used for transmitting data packets to the subsequent parameter derived from the receiver. 因此,无论该网络被配置具有接入点20与否,作为每个基站包括该接入点,如果使用,保存包含该通信参数的表,本发明的系统和方法将同样地工作。 Thus, regardless of whether the network is configured with access point 20 or not, as each base station includes the access point, if used, to save the table containing the communication parameters, the system and method of the present invention will work equally well.

[0031] 一些不同类型的通信参数可以从接收机发送给发射机,以最优化通信,例如提高或者降低数据传输速率。 [0031] The number of different types of communication parameters can be sent from the receiver to the transmitter to optimize communications, e.g., increase or decrease the data transfer rate. 通常,可以改变性能的任何参数可以被包括在该消息中。 In general, any parameter can change properties may be included in the message. 以下的例子是可以在接收机和发射机之间交换的更通用类型的通信参数。 The following example is a more generic type of communication parameters may be exchanged between the receiver and transmitter.

[0032] 位配置表(Bit Allocation Table)——位配置表在多载波调制系统中规定在每个载波上调制的位数,在多载波调制系统中该载波也被称为子信道、副载波、单音或者二进制数。 [0032] The bit allocation table (Bit Allocation Table) - Bit configuration table specified on each carrier modulation bits in a multi-carrier modulation systems, multi-carrier modulation system in which the carrier is also called subchannels, subcarriers , tone or binary number. 802. lla/g收发机在所有的子信道上使用相同的位数,它是最简单的位配置表。 802. lla / g transceiver uses the same number of bits in all the sub-channels, it is the most simple bit allocation table. 由于无线通信经历多路径,在频率方面该通信信道不是平坦的,这意味着不同的副载波将具有不同的信噪比。 Since the wireless communication through multi-path, in terms of the frequency of the communication channel is not flat, which means that different subcarriers will have different signal to noise ratio. 因此,为了在所有的载波上实现恒定的误码率,使用一个位配置表,使得具有较高信噪比的载波比具有较低信噪比的载波调制更多的位。 Therefore, in order to achieve a constant bit error rate on all carriers, the use of a bit allocation table, such that the carrier has a high SNR than the SNR of the modulated carrier with lower more bits. 这个过程通常被称为“位加载”。 This process is commonly referred to as "bit to load." 位加载和位配置表已经在ADSL多载波通信系统中使用了很多年。 Bit loading and bit allocation table has been used for many years in ADSL multicarrier communication systems. 例如,ITU标准G. 992. I和G. 992. 2是国际间的ADSL标准,其被作为参考资料完整地结合在此处,其详述了使用位加载和位配置表的通信。 For example, ITU standard G. 992. I and G. 992. 2 is the international standard ADSL, which is fully incorporated herein by reference, which details the communication using bit load and bit configuration table. 位加载也能够使用比64QAM (6比特)更高的构象尺寸(constellation size),64QAM是标准802. lla/g系统最大的构象尺寸。 Bit loading is possible to use than 64QAM (6 bits) higher conformation size (constellation size), 64QAM is standard 802. lla / g system has a maximum size of conformation. 如果该信道支持,可以使用调制达到15比特或更多的位加载构象,从而实现很大的数据传输速率改善。 If the channel is supported, modulation may be used up to 15 bits or more bits loading conformation, thereby achieving a substantial improvement in data transfer rate.

[0033] 编码调制参数一使用编码调制技术的系统,诸如格状编码调制和turbo编码调制比未结合调制和前向纠错编码的系统实现更高的编码优点。 [0033] Coded Modulation Parameters an encoding modulation techniques, such as trellis coded modulation and turbo coded modulation than unbound modulation and forward error correction coding system to achieve higher coding advantage. 但是,编码调制方案不编码所有的信息位,因此,编码调制必须与多径信道中的位加载相结合,以便实现该编码的增益权益。 However, coded modulation scheme does not encode all the information bits, therefore, must be combined with coded modulation multipath channel bit loaded, in order to achieve the interests of the coding gain.

[0034] 可变循环前缀(cyclic prefix)长度——循环前缀在多载波系统中使用以抗击多路径。 [0034] The variable cyclic prefix (cyclic prefix) Length - cyclic prefix to combat multipath in a multi-carrier system. 通常,只要信道的脉冲响应小于该循环前缀长度,由于信道多路径就会不存在码间干扰(inter-symbol interference)或者信道间(inter-channel)干扰。 Generally, as long as the channel impulse response is less than the cyclic prefix length, due to multi-path channel ISI will not exist (inter-symbol interference) or channel between (inter-channel) interference. 但是,由于该循环前缀是被加到每个通信码元的冗余循环扩展,该循环前缀也导致数据传输速率损失。 However, since the cyclic prefix is added to each communication redundancy cyclic extension symbol, the cyclic prefix can also lead to loss of data transmission rate. 802. lla/g标准使用具有一段O. 8微秒长固定的循环前缀,它是码元长度的20%。 802. lla / g standard uses eight microseconds long cyclic prefix having a fixed period of O., it is 20% of the symbol length. 因此,循环前缀的增加导致20%的数据传输速率降低。 Therefore, a cyclic prefix leads to a 20% increase in data transmission rate decreases. 如果该信道大约是与循环前缀相同的长度, 这是良好的折衷。 If the channel is approximately the same length as the cyclic prefix, which is a good compromise. 但是,如果该信道短得多,例如仅O. I微秒,那么其使降低循环前缀长度为O. I微秒有意义,以便得到19%的数据传输速率改善。 However, if the channel is much shorter, for example, only O. I microseconds, then the cyclic prefix length is so reduced O. I microseconds sense, so as to obtain a 19% improvement in data transfer rate. 同样地,如果该信道比O. 8微秒长得多,该循环前缀应该被扩展以匹配该信道的长度,因为码间干扰和信道间干扰的有效的水平或许将大大地降低能实现的数据传输速率。 Similarly, if the channel is much longer than O. 8 microseconds, the cyclic prefix should be extended to match the length of the channel, because the effective level of inter-symbol interference and inter-channel interference may be greatly reduced to achieve data transmission rate.

[0035] 可变的导频音(pilot tone)分配-标准802. lla/g接收机使用四个固定的导 [0035] variable pilot tone (pilot tone) assignment - Standard 802. lla / g receiver uses four fixed guide

频音,其在该发射频率频带上扩展。 Frequency tone, which extend in the transmit frequency band. 在802. lla/g系统中这是必需的,因为该发射机不知道哪个频带范围部分由于多路径处于深度无效之中。 At 802. lla / g system, which is necessary because the transmitter does not know which part of the frequency range in depth due to multi-path being invalid. 根据本发明一个示范的实施例,接收机可以传达给发射机哪个载波应该用于导频音。 According to the present invention, an exemplary embodiment, the receiver may communicate to the transmitter which carrier should be used for pilot tones. 由于接收机可以确定哪个载波具有高的信噪t匕,该接收机可以命令发射机在那些高信噪比载波上设置导频音。 Since the receiver can determine which carrier has a high signal to noise t dagger, the receiver can instruct the transmitter on those high SNR carrier pilot tone setting. 实际上,在很多情况下,单个的高信噪比载波足以用于所有的定时恢复需求,从而允许该系统在802. lla/g系统用于导频音的三个载波上发送数据。 In fact, in many cases, a single high SNR is sufficient for all carrier timing recovery requirements, thereby allowing the system at 802. lla / g system for transmitting data on the three carriers of the pilot tone. 当与标准802. lla/g系统相比的时候,这也提供数据传输速率提高。 When compared with the standard 802. lla / g system, when it also provides data transfer rates.

[0036] 作为选择,通信系统可以不必使任何的载波专用于导频音,即所有被调制的载波被信息位调制。 [0036] Alternatively, the communication system may not have to make any carrier dedicated to the pilot tone, i.e., all the modulated carrier modulated by the information bits. 在这种情况下,携带信息位的载波可用于执行“决定指向的”定时恢复算法。 In this case, the carrier carries the information bits can be used to perform "decision point" timing recovery algorithm. 例如,用于这种决定指向算法的载波通常将比实际上以规定的误码率可允许的携带更少的位,以便提供具有高信噪比的参考信号。 For example, the carrier for such a decision directed algorithm generally than a predetermined error rate is actually permissible to carry fewer bits to provide a reference signal having a high SNR.

[0037] 每个载波的增益微调(fine gain)——增益微调被用于诸如G. 992. I的ADSL标准中,以当使用位加载的时候在所有的载波上均衡该误码率。 [0037] The gain for each carrier trimming (fine gain) - is used to fine tune the gain G. 992. I such as the ADSL standard, to the time when the load balancing using the bit error rate on all carriers. 增益微调是在发射功率电平中很小的调整,能够使子信道基于专门测量的信噪比实现该系统所需的误码率。 Gain fine tuning the transmit power level is at a very small adjustment, enables the system to achieve the desired sub-channel bit error rate based on the measured SNR specialized.

[0038] 贯穿以下的论述,本发明示范的实施例将集中到作为原始优化的通信参数的位配置表上,该原始优化的通信参数在许多基站之间交换。 [0038] Throughout the following discussion, an exemplary embodiment of the present invention will focus on the optimization of the communication parameters of the original bit allocation table, the original optimized communication parameters between the plurality of base station switching. 这么做是因为位配置表的使用是一种实现优化通信和改变数据传输速率最有效的方式。 This is done because the bit allocation table is used to optimize communication and change a data transmission rate of the most efficient way. 但是,将应理解,有或者没有位配置表,其他的通信参数仍可以在许多基站之间交换,以实现在数据传输速率方面的改变,这些通信参数包括但不限于增益微调、格状编码调制、导频音位置、可变的循环前缀长度和类似的参数。 However, will be understood that there is no bit allocation table or other communication parameters can still be exchanged between the number of base stations, in order to effect a change in the data transmission rate, the communication parameters include, but are not limited to, a gain trim, trellis coded modulation pilot tone location, a variable cyclic prefix length and similar parameters.

[0039] 为了实现数据传输速率的改变,包含该通信参数的消息从接收机发送给发射机。 [0039] In order to effect a change in the data transmission rate, the message containing the communication parameters transmitted from the receiver to the transmitter. 这些通信参数可以用多种方法通信。 These communication parameters may be various methods of communication. 例如,该通信参数可以作为肯定的确认数据分组的一部分发送给发射机。 For example, the communication parameters can be used as part of a positive acknowledgment to the transmitter transmits the data packet. 在这种情况下,在接收该肯定的确认数据分组之后,发射机将使用包含在肯定的确认数据分组中的这些通信参数,用于后续数据分组的传送。 In this case, after receiving the positive acknowledgment packet, the transmitter will use the data contained in the positive acknowledgment packets in these communication parameters, for transmitting the subsequent data packet. 这些通信参数还可以作为诸如管理或者数据帧的一部分发送,该管理或者数据帧的一部分意欲在收发机之间交换信息。 These communication parameters may also be sent as part of such management or data frame, a part of the management or data frame is intended in the exchange of information between the transceiver. 例如,通信参数可以被作为在收发机之间发送的任何数据分组的扩展的报头字段的一部分发送。 For example, the communication parameters can be sent as part of any data packet extension header field transmitted between the transceivers.

[0040] 下面将结合图I和图2论述根据本发明的一个示范的实施例用于交换通信参数的协议的示范实施例。 [0040] Figure I below in conjunction with exemplary and discussed in FIG. 2 for protocol exchange communication parameters according to an exemplary embodiment of the present embodiment of the invention. 尤其是,图I示出了一个示范的网络1,诸如无线网络。 In particular, Figure I shows an exemplary network 1, such as a wireless network. 网络I包括由多个链路相互连接的多个基站10和一个接入点20。 I comprises a plurality of network base stations interconnected by a plurality of links 10 and an access point 20. 图2示出了一个示范的与第一和第二收发机有关的组成部分的实施例,例如,基站10或者接入点20。 Figure 2 illustrates an embodiment of the first and second transceiver associated components of an exemplary, e.g., base station 10 or the access point 20. 尤其是,第一收发机100包括消息确定模块110、通信参数确定模块120、数据分组确定模块130、发射机140、接收机150、存储器160和控制器170,所有这些由一个链路(未示出)连接。 In particular, the first transceiver 100 comprises a message determination module 110, a communication parameter determination module 120, packet determination module 130, a transmitter 140, a receiver 150, a memory 160 and a controller 170, all of which by a link (not shown a) connection. 第二收发机200包括消息确定模块210、通信参数确定模块220、数据分组确定模块230、发射机240、接收机250、 存储器260和控制器270,所有这些由一个链路(未示出)连接。 The second transceiver 200 comprises a message determination module 210, the communication parameter determination module 220, packet determination module 230, a transmitter 240, a receiver 250, memory 260 and controller 270, all of which are connected by a link (not shown) .

[0041] 为了描述的方便,的用于高速率OFDM通信系统的示范方法将结合第一收发机发送数据分组给第二收发机加以阐述。 [0041] For convenience of description, an exemplary method for high rate OFDM communications system in conjunction with a first transceiver transmits data packets to the second transceiver to articulate. 例如,第一收发机可以是基站2,第二收发机可以是接入点20。 For example, the first transceiver can be a base station 2, the second transceiver may be an access point 20. 或者,第一收发机可以是基站2,第二收发机可以是基站I等等。 Alternatively, the first transceiver can be a base station 2, the second transceiver may be a base station I, and so on. 该协议的相关部分随着第一收发机以一个最大可能的数据传输速率发送数据分组开始,例如用于802. Ila/g的54Mbps,以最后成功传送的数据传输速率,或者以已知的数据传输速率。 Relevant parts of the agreement with the first transceiver to a maximum possible data transmission rate of data packet start, for example 802. Ila / g of 54Mbps, the data transfer rate of the last transmitted successfully, or a known data transmission rate.

[0042] 具体地,该数据分组确定模块130和发射机140、存储器160及控制器170合作协同传送这个第一数据分组,即,在任何优化的通信参数被交换之前,并且使用标准尺寸固定的通信参数设置来发送数据分组,该通信参数设置诸如那些在IEEE 802. lla/g中规定的,例如,在所有的载波上每个音调固定的六个比特。 [0042] Specifically, the packet determination module 130 and a transmitter 140, a memory 160 and the controller 170 transmits the synergistic cooperation first data packets, i.e., prior to any optimization of communication parameters are exchanged and secured using standard size communication parameters to transmit the data packet, the communication parameters such as those specified in IEEE 802. lla / g, for example, on all the carriers for each tone fixed six bits.

[0043] 接下来,如果第二收发机的接收机250成功地从第一收发机100接收数据分组,在数据分组确定调制230、发射机240、存储器260和控制器270的合作下,第二收发机200再次返回给第一收发机一个肯定的确认数据分组。 [0043] Next, if the receiver of the second transceiver 250 first transceiver 100 successfully receives data from the packet, the data packet 230 to determine the modulation, the transmitter 240, in cooperation with memory 260 and a controller 270, a second transceiver 200 is returned to the first transceiver an affirmative acknowledgment packet again. 这个肯定的确认数据分组还包括由通信参数确定模块220确定的优化的通信参数,以被第二收发机200用于随后从第一收发机100接收数据分组。 The positive acknowledgment data packet further comprises determining the optimized communication parameters determined by the communication module 220 parameters to be used in the subsequent second transceiver 200 from a first transceiver 100 receives the data packet. 例如,该肯定的确认数据分组可以包含一个具有每个副载波不同的位的位配置表,例如,基于由第二收发机200测量的和由通信参数确定模块220确定的信道特性。 For example, the positive acknowledgment data packet may contain a different bit of each subcarrier bit allocation table has, for example, and based on the parameters determined by the communication module 220 determines the channel characteristics from the second transceiver 200 measurements. 作为选择,或者此外,这个确认数据分组还可以指示如上所述任意的优化的传输参数,例如,如上所述的应该作为导频音使用的一个或多个载波。 Alternatively, or in addition, the acknowledgment data packet may also indicate any transmission parameters optimized as described above, for example, should one or more carriers as a pilot tone used as described above.

[0044] 如果第二收发机200没有成功地从第一收发机100接收数据分组,第二收发机200不返回给第一收发机一个肯定的确认数据分组。 [0044] If the second transceiver 200 is not successful the first transceiver 100 receives data packets from the second transceiver 200 does not return to the first transceiver a positive acknowledgment packet. 在这种情况下,第一收发机100再次和数据分组确定模块130、发射机140、存储器160和控制器170合作以下一最高的或者另一个已知的标准数据传输速率发送数据分组。 In this case, the first transceiver 100 and a data packet re-determination module 130, a transmitter 140, a memory 160 and controller 170 cooperate following the highest or another known standard data transmission rate of data packets.

[0045] 如果第一收发机100接收肯定的确认数据分组,第一收发机和存储器160合作存储该优化的通信参数。 [0045] If the first transceiver 100 receives the positive acknowledgment data packet, the first transceiver and the memory 160 stores the optimized cooperative communication parameters. 然后,第一收发机100使用存储的通信参数,用于将后续的数据分组传送给第二收发机200。 Then, the communication parameters of the first transceiver 100 uses stored for subsequent data packet to the second transceiver 200. 优化的通信参数的使用被表示在从第一收发机100发送给第二收发机200的数据分组的报头字段中。 Using the optimized communication parameters are represented in a header field transmitted from the first transceiver 100 to the data packet the second transceiver 200 in. 例如,消息确定模块110改变报头字段以表示哪一个优化的通信参数正被使用。 For example, determining module 110 to change the message header field to indicate which one of the optimized communication parameters are being used.

[0046] 第二收发机的接收机250从第一收发机100接收该数据分组,并且基于在数据分组的数据字段中的信息,确定哪一个通信参数被使用。 [0046] The receiver of the second transceiver 250 from a first transceiver 100 receives the data packet, and based on the information in the data field in the data packet, to determine which communication parameters are used. 例如,这是通过解码该数据分组的报头字段实现的,该数据分组的报头字段表示正在使用的优化的通信参数。 For example, this is the header field by decoding the data packet to achieve, the data packet header field indicates the communication parameters are optimized for use. 然后,基于与使用优化的通信参数的消息确定/解码模块210相结合的数据字段中包含的信息,该数据分组可以被解调和解码,该优化的通信参数在先前的肯定的确认数据分组中从第二收发机发送给第一收发机。 Then, based on the use of optimized communication parameters of the message to determine the data field / decoding module 210 included in the combination, the data packet may be demodulated and decoded, the optimization of communication parameters in a previous positive confirmation of data packet transmitting from the second transceiver to the first transceiver.

[0047] 在第二收发机200从第一收发机100接收具有指定哪一个优化通信参数被使用的报头字段的数据分组之后,第二收发机200发送肯定的确认返回给第一收发机100。 After [0047] specifies which data having an optimal communication parameter header field is used in the second packet transceiver 200 received from the first transceiver 100, the second transceiver 200 sends a positive acknowledgment back to the first transceiver 100. 这个肯定的确认可以包含与用于最后成功接收的数据分组相同的参数,作为一个给第二收发机200的用存储的优化的通信参数继续发送的指示。 The positive acknowledgment packets may contain data for the last successfully received the same parameters, as to the second transceiver using a stored optimized communication parameters 200 continues to send the indication. 同样地,该肯定的确认可以只是一个基础的确认数据分组,如在常规的802. lla/g系统中,以表示该数据分组被成功地在第二收发机上接收,并且通信应该使用相同的优化的通信参数继续。 Likewise, the positive acknowledgment can just be an acknowledgment packet basis, such as in a conventional 802. lla / g system, to indicate that the data packet is successfully received at the second transceiver, and the communication should use the same optimization communication parameters continues. 如果优化的通信参数在扩展的通信对话期间伴随所有的肯定的确认,这个机制有效地跟踪。 If the optimized communication parameters during the communication session along with the expansion of the positive acknowledgment of all, this mechanism effectively track.

[0048] 作为选择,第二收发机200可以在确认消息中发送新的、第二组优化的通信参数。 [0048] Alternatively, the second transceiver 200 may transmit a new, second set of optimized communication parameters in the confirmation message. 这些新的参数例如可以请求在数据传输速率方面改变,诸如更高的数据传输速率。 These new parameters for example can request a change in data rates, such as the higher data transmission rate. 在这种情况下,在接收确认数据分组之后,第一收发机100可以使用第二组优化的通信参数开始传送。 In this case, after receiving the acknowledgment data packet, the first transceiver 100 may use a second set of optimized communication parameters starts transmitting.

[0049] 在第二收发机200没有成功地接收由第一收发机100发送的数据分组的情况下,第二收发机200将不发送肯定的确认返回给第一收发机100,其中该数据分组具有指定哪一个通信参数被使用的修改的报头字段。 [0049] In the case of the second transceiver 200 does not successfully receive data transmitted by a transceiver 100 of the first packet, the second transceiver 200 will not send a positive acknowledgment back to the first transceiver 100, wherein the data packet Which one has to modify the communication parameters are used to specify the header field. 在这种情况下,第一收发机100将确定该优化的通信参数不再有效,并且将通过返回到第一步重新开始协议,这里第一收发机100将使用固定的/标准通信参数,以已知的数据传输速率开始通信,诸如最高的数据传输速率(例如在802. lla/g 系统中54Mbps)。 In this case, the first transceiver 100 determines the optimized communication parameters are no longer valid, and will start again by returning to the first step of the protocol, where the first transceiver 100 uses a fixed / standard communication parameters, in order to Known data transmission rate communication is started, such as the maximum data transfer rate (e.g. 54Mbps in 802. lla / g system).

[0050] 在使用第一组优化的参数传送数据分组之后,在第一收发机100从第二收发机200接收肯定的确认,并且这个肯定的确认包含新的、第二组优化的参数的情况下,这些新的参数应该被用于后续的数据分组传送。 Information [0050] After transmitting data using the first set of parameters to optimize the packet, from a first transceiver 100 second transceiver 200 receives a positive acknowledgment, and this positive acknowledgment contains a new, second set of optimized parameters Under these new parameters should be used for subsequent data packets. 但是,在使用第二组优化参数发送数据分组之后,如果第二收发机200没有接收肯定的确认数据分组,那么第二收发机200恢复到该协议的第一步,数据分组以已知的诸如下一最高的数据发送。 However, after the first step, using the second set of optimization parameters to send data packets, if the second transceiver 200 does not receive a positive acknowledgment packet, the second transceiver 200 returns to the protocol, such as a data packet in a known the next highest data transmission. 但是,在这种情况下,第一收发机可以通过使用第一组优化的通信参数传送或者通过使用固定/标准通信参数(例如在802. lla/g标准中54Mbps)的数据传输速率传送而开始。 However, in this case, the first transceiver may begin transmitting a communication parameter by using the first set of optimized, or by using a fixed / standard communication parameters (e.g., in 802. lla / g standard 54Mbps) data transfer rate .

[0051 ] 作为选择,或者此外,第一收发机100和第二收发机200可以周期性地发送“参考”或者“训练”数据分组,其可以由该收发机的接收机部分和该通信参数确定模块一起使用,以确定优化的传输参数。 [0051] Alternatively, or in addition, the first transceiver 100 and second transceiver 200 may periodically send "reference" or "training" data packet, which can be determined by the receiver portion of the transceiver and the communication parameters modules used together to determine the optimized transmission parameters. 例如,这些训练数据分组可以是包含该收发机已知信号的数据分组。 For example, the training data packet may be a packet containing the data transceiver known signal.

[0052] 例如,该训练数据分组可以是在基站和网络之间没有数据发送期间发送的携带非信息的数据分组。 [0052] For example, the training data packet may be between the base station and the network transmits data packets carry no data transmission during non-information. 由于这些数据分组被预先确定和在接收之前为接收机所知,接收机可以使用它们去精确地测量该信道的效果,例如多路径分布、每个载波的信噪比等等。 Since these data packets are predetermined and known to the receiver before reception, the receiver can use them to accurately measure the effect of the channel, such as multipath distribution, signal to noise ratio for each carrier and the like. 这些训练数据分组还可以用于训练接收机均衡器,该接收机均衡器用来均衡诸如无线信道和/或接收机滤波器和/或发射机滤波器。 These training data packets can also be used to train a receiver equalizer, the receiver such as a radio channel equalizer for equalizing and / or receiver filters and / or the transmitter filter.

[0053] 在常规的无线局域网系统中,每个数据分组包含一个报头字段,其表示用于传送该数据分组的数据字段的数据传输速率。 [0053] In the conventional wireless LAN system, each data packet contains a header field indicating the data transmission rate for transmitting the data field of the data packet. 该报头字段使用固定的调制/编码方案发送,诸如以802. lla/g标准,因此可以由所有的基站解调。 The header field uses a fixed modulation / coding scheme transmit, such as in 802. lla / g standards, thus the base station can be demodulated by all. 根据本发明一个示范的实施例,该报头字段还将表示优化的通信参数是否被用在数据分组中发送数据字段。 According to an exemplary embodiment of the invention, the header field also indicates whether the optimized communication parameters are used in the data field in the data packet transmission. 这可以用多种方法做至IJ。 This can be done using a variety of methods to IJ. 例如,该报头字段可以如802. lla/g中的包含数据传输速率的指示。 For example, the header fields can be as 802. lla / g in the instruction includes a data transmission rate. 另外,该报头字段可以包含一个位字段,其表示是否将使用该优化的通信参数。 In addition, the header field can contain a bit field, which indicates whether to use the optimized communication parameters. 这个位字段可以是单个位,其表示是使用上一次交换的优化的通信参数,还是使用标准固定通信参数的一个。 The bit field may be a single bit, which indicates that the use of a communication parameter exchange optimization, or the use of a standard fixed communication parameters. 另外,该位字段可以是表示多个优化的通信参数组的一个的多个位。 Further, this bit field can be represented one of a plurality of optimized communication parameters set in the plurality of bits.

[0054] 在具有接入点20的网络例子中,当发送数据分组给该接入点20的时候,每个基站发射机将存储要被使用的优化的通信参数。 [0054] In the example network having an access point 20, when transmitting data packets to the access point 20 when, for each base station transmitter is stored optimized communication parameters to be used. 这些优化的参数将由接入点20接收机产生,并且发送给如上所述的基站。 Optimization of these parameters would be the access point 20 receiver generates and transmits to the base station as described above. 显而易见,由于每个基站10处于不同的位置,并且可能移动,在发送数据分组给接入点20的时候,每个基站发射机可能具有被使用的不同的优化参数。 Obviously, since each base station 10 in different positions, and may move, in transmitting data packets to the access point 20 when, for each base station transmitter may have different optimized parameters are used. 接入点20还必须存储这些优化的参数,这些参数当从不同的基站10接收数据分组的时候被该接入点20接收机使用。 The access point 20 must also store these optimized parameters, these parameters when receiving data packets 10 from a different base station is to use the access point 20 receiver. 对于每个基站10,接入点20可以具有不同组的优化参数。 For each base station 10, access point 20 may have a different set of optimized parameters. 由于接入点20从所有的基站接收数据分组,接入点20必须能够基于在分组报头中的信息(即信号字段)来确定被用于该数据字段的参数。 Since the access point 20 receives data packets from all the base stations, based on the access point 20 must be able to information (i.e., signal field) in the packet header is used to determine the parameters of the data field. 接入点20可以使用分组报头来确定是否使用了该优化的参数,但是由于接入点20不知道哪一个基站实际上发送该数据分组,接入点20不能单独基于该报头确定正确的参数。 The access point 20 can use the packet header to determine whether the optimization parameters, but due to the access point 20 does not know which one is actually the base station transmits the data packet, the access point 20 can not be based solely on the header to determine the correct parameters.

[0055] 因此,根据本发明示范的实施例,该报头还包括一个位字段,其表示哪一个基站发送该数据分组。 [0055] Thus, according to an exemplary embodiment of the present invention, the header also includes a bit field, which indicates which base station transmits the data packet. 在这种情况下,接入点20将使用这些信息去确定应该使用哪组参数。 In this case, the access point 20 will use this information to determine which set of parameters should be used. 作为选择,接入点20可以使用其它的措施去确定哪个基站发送该数据分组。 Alternatively, the access point 20 may use other measures to determine which base station transmits the data packet. 例如,接入点20可以使用该接收信号的功率,基于频率均衡器抽头的信道估算、载波偏移值等等。 For example, the access point 20 may use the power of the received signal, based on the frequency equalizer tap channel estimation, carrier offset value, and so on.

[0056] 在诸如具有接入点20的无线局域网的网络例子中,当发送数据分组给特定的基站10的时候,接入点发射机将存储被使用的优化的通信参数。 [0056] In the example of a wireless local area network, such as the access point 20, when transmitting data packets to a particular base station 10, the access point transmitter stored optimized communication parameters to be used. 这些优化的通信参数将由基站接收机产生,并且发送给如上所述的接入点20。 These optimized communication parameters by the base station receiver generates, and transmits to the access point 20 as described above. 显而易见,由于每个基站处于不同的位置,当发送数据分组给不同的基站10的时候,该接入点20可以具有被使用的多组不同的优化通信参数。 Obviously, since each base station is in a different position, when transmitting data packets to the different base stations 10 when the access point 20 may have different sets of optimized communication parameters to be used. 然后,当从该接入点20接收数据分组的时候,每个基站10也存储对应于要被基站接收机使用的那个基站的优化通信参数。 Then, when the access point 20 is received from the data packet, each base station 10 is also stored corresponding to the optimized communication parameters to be used by that base station of the base station receiver. 每个基站10也应该能够基于在分组报头中的信息(即信号字段)来确定被用于数据字段的通信参数。 Each base station 10 should be able to based on the information (i.e., signal field) in the packet header to determine a communication parameter to be used for the data field. 因此,每个基站10使用分组报头来确定是否已经使用该优化的通信参数。 Thus, each base station 10 uses the packet header to determine whether to use the optimized communication parameters. 与接入点接收机不同,每个基站接收机意欲仅从接入点20接收数据分组,因此基站10也许能单独基于该报头确定该通信参数。 Receiver with different access points, each base station receiver is intended only from the access point 20 receives data packets, so the base station 10 may be able to separate the header is determined based on the communication parameters.

[0057] 由于所有的基站将从接入点20接收数据分组,每个基站必须也能够基于前同步码和分组报头(即信号字段)来确定被用于该数据字段的通信参数。 [0057] Since all the base stations from the access point 20 receives data packets, each base station must also be based on a preamble and a packet header (i.e., the signal field) is used to determine the communication parameters of the data field. 显而易见,如果该数据分组不是为特定的基站接收机设计的,该接收机可能使用不正确的优化通信参数去接收数据分组。 Obviously, if the data packet is not for the particular base station receiver design, the receiver may use incorrect parameters to optimize communications received data packets. 这实际上是不成问题的,因为该数据分组首先不是为接收机设计的。 This is actually not a problem, because the data packet is not primarily for the receiver design. 但是,由于该协议要求发射机去遵从已经在进行中的通信,每个基站必须能够基于该数据分组持续时间确定不同的协议计数器。 However, since the protocol requires the transmitter to comply with the communication already in progress, based on each base station must be able to determine the duration of the data packet counters of different protocols. 即使错误的通信参数的使用不允许接收机去正确地解码该消息,报头必须提供一种确定该数据分组持续时间的方式。 Even using the wrong communication parameters do not allow the receiver to decode the message correctly, the header of the data packet must provide a way to determine the duration. [0058] 如上所述,一旦接收的收发机确定优化的传输参数,接收的收发机需要发送这个信息给发射的收发机,以用于两个设备之间后续的通信。 [0058] As described above, upon receiving transceiver determining an optimal transmission parameters, the receiving transceiver needs to send this information to the transceiver transmission, for subsequent communication between the two devices. 此外,如上述讨论的,该优化的传送信息可以被作为确认数据分组的一部分发送。 Further, as discussed above, the transmission of information can be optimized as part of the acknowledgment data packet transmitted. 作为选择,或者此外,该优化的传输参数可以在定期的或者例如触发的基础上,作为管理帧或者规则信息携带帧的一部分被交换。 Alternatively, or in addition, the optimized transmission parameters can be based on a regular or triggered, for example, as a management frame or a portion of the rule information is exchanged carrying frame. 在这两种情况下,该优化的传输参数可以被作为扩展的分组报头字段(亦称为信号字段)的一部分,,或者作为该数据分组信息字段的一部分发送。 In both cases, the optimized transmission parameters can be used as the extended packet header field (also referred to as signal field) ,, or part of the data packet sent as part of the information field. 在一个扩展的分组报头字段的情况下,该信息以固定速率发送,并且可以被该网络中所有的系统解码。 In the case of an extended packet header field, the message sent at a fixed rate, and may be all of the systems in the network decoding. 例如,在该分组报头字段中的一个位可用于表示一组新的优化的传输参数已经被附加到扩展的分组报头字段。 For example, a bit in the packet header field may be used to represent a new set of optimized transmission parameters have been appended to the extended packet header field.

[0059] 在后者的情况下,该信息可以使用优化的用于通信的参数被发送。 [0059] In the latter case, the information may be used to optimize the parameters for the communication is transmitted. 注意到在这种情况下,用于从接收机发送优化的传输参数信息给发射机的该优化的传输参数是不相同的。 Note that in this case, transmission parameters for optimized transmission sent from the receiver to the transmitter parameter information of the optimization is not the same. 例如,假定第一收发机150的接收机确定用于从第二收发机的发射机240发射数据分组给第一收发机的接收机150的优化的传送信息。 For example, assume that the receiver of the first transceiver 150 for transmitting information from a transmitter to determine the second transceiver 240 to transmit data packets to the first receiver 150 of transceiver optimized. 第一收发机的发射机140发送数据分组给第二收发机的接收机250,这里该数据分组包含用于从第二收发机的发射机240发射数据分组给第一收发机的接收机150的优化的传输参数。 The transmitter of the first transceiver 140 transmits data packets to a receiver of the second transceiver 250, where the data packet contains the second transceiver from the transmitter 240 to transmit data packets to the first receiver 150 of the transceiver optimized transmission parameters. 从第一收发机的发射机140发送给第二收发机的接收机250的该数据分组可以使用标准固定的速率发送,正如在常规的802. lla/g系统中那样的,或者可以使用在第一收发机100和第二收发机200之间交换的优化的传输参数发送。 From a transmitter of the first transceiver 140 second transceiver transmits to the receiver of the data packet 250 may be transmitted using standard fixed rate, As in conventional 802. lla / g system, or may be used during a transceiver 100 and transmission parameters exchanged between the transceiver 200 of the second transmission optimization. 显而易见,用于从第一收发机100和第二收发机200发送的该优化的传输参数已经先在通信对话过程中交换。 Obviously, to have been the first exchange from the first transceiver 100 and the transmission parameters of the second transceiver 200 sends the optimized communication conversation.

[0060] 图3是一个根据本发明交换通信参数的常规示范的方法的流程图。 [0060] FIG. 3 is a flowchart showing an exemplary method according to the present invention, the conventional exchange of the communication parameters. 具体地,控制在步骤SlOO开始,并且继续到步骤S110。 In particular, control begins in step SlOO, and proceeds to step S110. 在步骤SllO中,第一收发机(指定为Tl)确定和发送一个数据分组给第二收发机(指定为T2),以已知的、最高的、上一次成功的或者变化的速率的至少一个发送。 At least one step SllO, the first transceiver (designated as Tl) to determine and transmit a data packet to the second transceiver (designated as T2), a known, the highest, the last successful or the rate of change of Send. 接下来,在步骤S120中,进行确定数据分组是否在第二收发机上被成功地接收。 Next, in step S120, a determination whether the data packet is successfully received at the second transceiver. 如果该数据分组没有被成功地接收,控制跳转至步骤S130。 If the data packet is not successfully received, control jumps to step S130. 否则,控制继续至步骤S140。 Otherwise, control proceeds to step S140.

[0061] 在步骤S130中,指定数据传输速率的该通信参数根据情况而增加/减少。 [0061] In step S130, the specified data transmission rate of the communication parameters according to the situation and increase / decrease. 然后,控制继续返回到步骤S110。 Control then continues back to the step S110.

[0062] 在步骤S140中,第二收发机返回给第一收发机一个肯定的确认,其可以或者可以不必包括优化的通信参数。 [0062] In step S140, the second transceiver to the first transceiver returns a positive acknowledgment, which may or may not necessarily include communication parameters optimization. 如果该肯定的确认包含优化的通信参数,第二收发机存储这些参数。 If the positive confirmation contains optimized communication parameters, the second transceiver stores these parameters. 接下来,在步骤S150中,第一收发机接收该确认。 Next, in step S150, the first transceiver receives the acknowledgment. 然后,在步骤S160中,如果从第二收发机返回的该肯定的确认包含通信参数,第一收发机存储该优化的通信参数。 Then, in step S160, if the positive acknowledgment from the second transceiver returns contains communication parameters, a first transceiver stores the optimized communication parameters. 然后,控制继续到步骤S170。 Control then continues to step S170.

[0063] 在步骤S170中,第一收发机确定一个报头字段。 [0063] In step S170, the first transceiver to determine a header field. 然后,在步骤S180中,第一收发机使用该存储的优化的通信参数开始通信。 Then, in step S180, the first transceiver to start communication using the communication parameters of the stored optimized. 然后,在步骤S190中,进行确定是否第二收发机接收到该数据分组。 Then, in step S190, a determination whether the second transceiver receives the data packet. 如果该数据分组被接收,控制继续至步骤S200。 If the data packet is received, control proceeds to step S200. 否则,控制跳转至步骤S130。 Otherwise, control jumps to step S130.

[0064] 在步骤S200中,第二收发机解码该报头字段,并确定要使用的该通信参数。 [0064] In step S200, the second transceiver to decode the header field, and to determine the communication parameters to be used. 接下来,在步骤S210中,第二收发机使用存储的优化的通信参数解调和解码该数据字段。 Next, in step S210, the second transceiver using the stored optimized communication parameters to demodulate and decode the data field. 然后,在步骤S220中,第二收发机确定该确认返回给第一收发机。 Then, in step S220, the second transceiver determines the acknowledgment back to the first transceiver. 然后控制继续至步骤S230。 Control then proceeds to step S230.

[0065] 在步骤S230中,第二收发机发送该确认给第一收发机。 [0065] In step S230, the second transceiver sends the acknowledgment to the first transceiver. 这个消息可以或者可以不必包含优化的通信参数。 This message may or may not have to include the communication parameter optimization. 然后,控制继续至步骤S240,在这里该控制程序结束。 Then, the control proceeds to step S240, where the control program ends.

[0066] 上述讨论到的基本概念还可以扩展至传统系统。 [0066] The basic concepts discussed above can also be extended to the traditional system. 在下面的论述中,仅执行当前的802. lla/g标准的基站将被称为传统基站。 In the following discussion, only the implementation of the current 802. lla / g standard base station will be referred to a traditional base station. 能够以本发明的方法通过优化的通信参数提供高速率数据通信的基站被称为扩展速率(ER)基站。 The method of the present invention, the base station can provide communication parameters optimized by the high rate data communication is called propagation rate (ER) base station. 使得交换、发送和接收使用这些优化的通信参数的方法和协议被称为扩展速率系统和协议。 Making the exchange, sending and receiving communication parameters using these optimization methods and protocols are called expansion rate systems and protocols. 在这个示范的实施例中,一个扩展速率基站也支持当前的802. lla/g标准。 In this exemplary embodiment, the base station also supports an extension rate of the current 802. lla / g standard.

[0067] 例如,图5示出了一个示范的通信系统500,其包括多个扩展速率基站510、520,一个或多个传统基站530,和例如一个接入点540。 [0067] For example, Figure 5 illustrates an exemplary communication system 500, which includes a plurality of base stations 510, 520 propagation rate, one or more conventional base station 530, and for example, an access point 540.

[0068] 当工作在具有传统基站530和扩展速率基站510、520的环境中的时候,存在两个主要互操作性要求以确保网络稳定性。 [0068] When working with a conventional base station 530 and base station 510, 520 of the expansion rate of the environment, when there are two major interoperability requirements to ensure network stability. 首先,传统基站530必须能够接收ER分组报头(信号字段),并且使用该信号字段参数以正确地确定该数据分组持续时间,即数据分组传输需要的时间。 First, the base station 530 must be able to receive conventional ER packet header (signal field), and uses the signal field parameters to correctly determine the packet duration, i.e. the time required for transmission of data packets. 这将保证传统基站530正确地设置其网络分配矢量(NAV)和其他相关的计数器,使得用于介质访问的争用算法精确的操作将被保持。 This will ensure that the legacy base station 530 sets its network allocation vector (NAV) and other related counters correctly, so that contention for the media access algorithm using precise operation will be maintained.

[0069] 其次,如果该数据分组意欲用于该基站,扩展速率基站510、520必须能够基于扩展速率分组报头确定传输参数,例如位配置表。 [0069] Next, if the data packet is intended for the base station, the base station 510, 520 must be capable of growth rate based on the packet header to determine the propagation rate of the transmission parameters, e.g., bit allocation table. 此外,不是意欲接收该数据分组的扩展速率基站也必须使用该信号字段参数,以正确地确定该数据分组持续时间,即分组传输需要的时间。 In addition, the expansion rate of the base station not intended receiver of the data packet must also use the SIGNAL field parameters to correctly determine the packet duration, i.e., the packet transmission time required. 这将确保该扩展速率基站正确地设置其网络分配矢量和其他相关的计数器,使得用于介质访问的争用算法精确的操作将被保持。 This ensures that the propagation rate of the base station to correctly set its network allocation vector and other related counters so that contention for the media access algorithm using precise operation will be maintained.

[0070] 为了确保满足两个上述的要求,图4示出了一个示范的使用扩展信号字段的修改的分组报头。 [0070] In order to ensure that it meets the above two requirements, Figure 4 shows a modification of the extended signal field using an exemplary packet header. 在这个说明性的802. Ila例子中,该信号字段被扩展。 802. Ila in this illustrative example, the signal field is extended. 该扩展的信号字段的第一部分具有与标准802. Ila信号字段报头相同的结构。 Having the same structure as the first header portion of the extended signal field and the standard 802. Ila signal field. 该扩展的信号字段的第一个码元按照如在IEEE 802. Ila中指定用于标准信号字段的信号调制编码参数来调制,即6MbpsBPSK,编码速率=1/2。 The first symbol of the extended signal field in accordance with the signal modulation and coding parameters such as the IEEE 802. Ila field specifies the standard signal to modulate, i.e. 6MbpsBPSK, coding rate = 1/2. 因此,传统基站可以正确地从该扩展的信号字段的第一部分接收该信号字段位。 Therefore, the conventional base station may receive the signal from the first portion of the bit field is extended signal field correctly.

[0071] 在下一个码元中该扩展的信号字段的第二部分包含发射机(TX)和接收机(RX)基站标识符。 [0071] In the next symbol in the second portion of the extended signal field comprises a transmitter (TX) and receiver (RX) base station identifier. 这些扩展的信号字段位也被使用802. lla6Mbps,编码速率=1/2的调制方法来调制。 These extended signal field bits are also used to modulate 802. lla6Mbps, modulation coding rate = 1/2. 在图4中,这些扩展的信号字段位在该扩展的信号字段报头的第二码元中发送,在标准802. Ila系统中该码元对应于数据码元编号一。 In Figure 4, these extended signal field bits in the extension field of the header of the second signal symbols sent, in the standard system 802. Ila symbol number corresponding to a data symbol.

[0072] 由于在图5中示出了的示范的通信系统500中存在传统以及扩展速率基站两者,一个扩展的速率基站需要能够确定和识别何时接收的数据分组包含扩展的信号字段报头,与标准802. Ila报头相反,其包含在两个码元中,标准802. Ila报头仅包含在一个码元中。 [0072] Due to the presence of both a traditional and a base station in the expansion rate of the communication system 500 in FIG. 5 shows the exemplary, an extended rate station needs to be able to determine and identify when the received data packet contains an extended signal field header, standard 802. Ila header contrast, which is contained in two symbols, the standard 802. Ila header contains only one symbol. 这可以通过在标准802. Ila信号字段中设置一个位来实现。 This is done by setting a bit in the standard 802. Ila signal field to achieve. 这个位将被称为ER使能位。 This bit will be called ER enable bit. 作为一个例子,802. Ila在速率(RATE)字段和长度(LENGTH)字段之间保留的位可以被用作ER使能位。 As an example, 802. Ila between the rate (RATE) field and the length (LENGTH) field reserved bits can be used as ER enable bit. 例如,当这个保留的位(R)被设置为I的时候,这表示一个扩展速率报头正在被使用。 For example, when the reserved bits (R) is set to I, when it represents an extension rate of header is being used. 当该保留的位(R)被设置为0的时候,这表示一个标准802. Ila报头正在被使用。 When the reserved bit (R) is set to 0, which means that a standard header 802. Ila is being used.

[0073] 再次参考图5,其示出了两个ER基站510和520以及传统基站530和一个扩展速率接入点540。 [0073] Referring again to FIG. 5, which shows two base stations 510 and 520 and the ER conventional base station 530 and an extension rate of the access point 540. 在图5中不同的链路表示例如一个扩展速率数据分组的通信路径,其中ER使能位(R)被标记在预备的位R位置中,并且发射机/接收机基站标识符(TX/RX STA ID)存在于该扩展的信号字段中。 In Figure 5, for example, different link represents a communication path propagation rate data packet, wherein the ER enable bit (R) is labeled R in the preliminary bit position, and a transmitter / receiver base station identifier (TX / RX STA ID) is present in the extended SIGNAL field. [0074] 下面将结合图5和图6论述示范的发生在不同的基站之间的通信。 [0074] below with reference to FIGS. 5 and 6 discussed exemplary occurs between different base stations in communication. 尤其是,图6示出了可能存在于图5的基站中的示范的组成部分。 In particular, FIG. 6 shows a part of Figure 5 may be present in the base station in the exemplary. 尤其是,基站600包括消息确定模块610、通信参数确定模块620、数据分组确定模块630、ER检测模块640、基站ID解码器/编码器650、接收机660、发射机670、存储器680和控制器690。 In particular, the base station 600 includes a message determination module 610, the communication parameter determination module 620, packet determination module 630, ER detection module 640, a base station ID decoder / encoder 650, a receiver 660, a transmitter 670, a memory 680, and a controller 690. 在基站600中示出的许多的组成部分类似于那些在第一收发机100和第二收发机200中看到的。 In base station 600 shown in part similar to those seen in many of the first transceiver 100 and second transceiver 200. 因此,不想再讨论与本发明的这个实施例有关联的这些组成部分的功能。 Therefore, do not want to discuss with this embodiment of the present invention associated functions of these components. [0075] 通信路径I :从接入点540传送数据分组到ER使能基站,例如ER基站510。 [0075] communication path I: 540 to transfer data packets from the access point to the ER enabled base stations, base station such as ER 510.

[0076] 接入点540转发给ER基站510 —个数据分组。 [0076] ER access point 540 is forwarded to the base station 510-- data packets. 该ER基站510在ER检测模块640的合作下检测ER使能位,并且确定该数据分组是一个ER数据分组。 The base station 510, in cooperation with ER ER ER detection module 640 detects enable bit, and determines if the packet is a packet ER.

[0077] 接下来,基站ID解码器/编码器650解码RX STA ID位和扩展的报头字段,以确定是否接收的数据分组意欲用于这个特定的基站。 [0077] Next, the base station ID decoder / encoder 650 decodes RX STA ID bit and extension header field to determine whether the received data packet is intended for this particular base station. ER基站510在基站ID解码器/编码器650的合作下也解码在扩展的速率报头中的TX STA ID,并且确定是否这个数据分组是来自接入点540。 ER base station 510 in cooperation with the base station ID decoder / encoder 650 is also decoded in the extended rate header TX STA ID, and determines whether the data packet is from the access point 540. 基于这个信息,接收扩展速率基站510使用当从接入点540接收该数据分组的时候使用的存储的优化通信参数。 Based on this information, the receiving station 510 using the growth rate when the data packet is received from the access point 540 communication parameters to optimize storage use. 扩展速率基站510使用该优化参数,以正确地解码该数据分组剩余的字段,即数据字段。 The base station 510 uses the propagation rate optimization parameters to correctly decode the remaining fields of the data packet, i.e. the data field. 自然地,该RX基站早先已经在对话中发送这些优化的通信参数给该接入点。 Naturally, the RX station previously has sent these optimized communication parameters to the access point in the dialogue.

[0078] 通信路径2 :另一个ER使能基站,例如基站520,偶然地从接入点540接收数据分组。 [0078] Communication Path 2: Another ER enabled station, such as base station 520, 540 accidentally receives data packets from the access point.

[0079] 基站520和ER检测模块640合作检测在数据分组中发自接入点540的ER使能位,并且确定该数据分组是一个ER数据分组,以及在STAID解/编码器650的合作下,解码在扩展的报头字段中的RX STA ID位,并且确定该接收的数据分组不是意欲用于这个特定的基站。 [0079] The base station 520 and 640 co-ER detection module detects a data packet sent from the access point 540 ER enable bit, and determines if the packet is a packet ER, as well as in cooperation with the STAID solution / encoder 650 decoding in the extended header field of the RX STA ID bits, and determines that the received packet is not intended for this particular base station. 然后,如下所述,基于“欺骗的”速率,包含在该信号字段中的长度信息,基站520设置网络分配矢量和相关的计数器。 Then, as described below, based on the "cheated" rate, length of information contained in the signal field, the base station 520 to set the network allocation vector and related counters.

[0080] 由于基站520确定接收的数据分组不是意欲用于它本身,基站520甚至无需解码该数据分组。 [0080] Since the base station 520 determines that the received data packet is not intended for itself, even without the base station 520 decodes the data packet. 这个方法的一个额外的好处是当数据分组被接收的时候,基站可以很早就检测其是否是数据分组意欲的接收方,因此如果不是这样,该基站无需解码该数据分组的其余部分。 An additional advantage of this method is that when the data packet is received, the base station can detect very early whether it is a data packet intended recipient, so if it is not, the base station without decoding the remainder of the data packet. 这将例如在基站中节省功率,因为该基站不会耗费解码该数据分组的其余部分所需的处理功率,因此,例如该基站可以进入低功率模式。 This will save power in the base station, for example, because the base station to decode the data packet does not consume the remaining part of the processing power required, therefore, for example, the base station may enter a low power mode.

[0081] 通信路径3 :传统基站530偶然地接收来源于接入点540的数据分组。 [0081] 3 communication paths: the traditional base station 530 accidentally receives a data packet from an access point 540.

[0082] 传统基站通常没有意识到ER分组报头。 [0082] traditional base stations are generally not aware of ER packet header. 因此,除了传统基站530应该忽略的ER使能位之外(因为其是备用的),传统基站530将正确地解码ER数据分组的第一部分,其被包含在该报头字段的第一个码元中,并且与标准802. Ila信号字段相同。 Thus, in addition to a conventional base station 530 should ignore ER enable bit outside (because it is a backup), a traditional base station 530 will correctly decode the first portion of ER data packet, which is included in the first code the header fields of the meta , and with the same standard 802. Ila signal field.

[0083] 基于包含在该信号字段中的“欺骗的”速率/长度信息,该传统基站530设置网络分配矢量和相关的计数器,如在下面论述的,允许802. Ila介质占用算法的正确的传统操作。 [0083] Based on the signal included in the field of "spoofing" rate / length information, the conventional base station 530 to set the network allocation vector and related counters, as discussed below, allowing 802. Ila medium occupancy algorithms correct tradition operation. 使用该欺骗的速率和长度信息,传统基站530将错误地解调该数据码元,因为该基站不知道优化的通信参数,直到最终CRC错误将导致该数据分组被忽略为止。 Using the rate and length information of deception, a traditional base station 530 will incorrectly demodulating the data symbols, since the base station does not know the optimized communication parameters, until the final CRC error will cause the data packet is ignored so far.

[0084] 通信路径4 :从ER使能基站510传送数据分组到接入点540。 [0084] Communication Path 4: from the ER to enable the base station 510 transmits data packets to the access point 540.

[0085] 接入点540检测该ER使能位,确定接收的数据分组是一个ER数据分组,并且解码在扩展报头字段中的该RX STA ID位,以确定是否该数据分组是意欲用于它本身。 [0085] to detect the ER 540 access points enable bit determines the received packet is a packet ER, and decodes the extended header field of the RX STA ID bits to determine whether the packet is intended for it itself. 接入点540也解码在ER报头中的TXSTA ID,并且确定哪个基站发送该数据分组。 The access point 540 is also decoded in the ER header TXSTA ID, and determines which base station transmits the data packet. 基于这个信息,接入点540使用该存储的优化通信参数,以当从那个特定的发射机基站接收数据分组的时候使用。 Based on this information, the access point 540 using the stored optimized communication parameters to when receiving data packets from the base station to use that particular transmitter. 然后,接入点540使用该优化的参数,以正确地解码该数据分组剩余的字段,即数据字段。 Then, the access point 540 using the optimization parameters to correctly decode the remaining fields of the data packet, i.e. the data field. 当然,该接入点540早先已经在通信对话中发送该优化的通信参数给该发射机基站。 Of course, the access point 540 transmits a communication parameter that has been previously optimized for the base station to the transmitter in the communications session.

[0086] 通信路径5 :另一个ER使能基站520偶然地接收来源于ER基站510的数据分组。 [0086] communication path 5: Another ER accidentally enable the base station 520 receives data packets from the base station 510 ER.

[0087] 该基站510在ER检测模块的合作下检测ER使能位,确定这是一个ER数据分组,并且在STAID解/编码器650的合作下解码在扩展的报头字段中的RX ST ID位,以确定该数据分组不是意欲用于它本身。 [0087] The base station 510, in cooperation with ER detection module detects ER enable bit, sure this is an ER data packets, and decodes the extended header field RX ST ID bits in cooperation STAID solution / encoder 650 , to determine if the data packet is not intended for itself. 然后,如在下面论述的,基于“欺骗的”速率,包含在该信号字段中的长度信息,该基站510设置网络分配矢量和相关的计数器。 Then, as discussed below, based on the "cheated" rate, the length of the information contained in the signal field, the base station 510 to set the network allocation vector and related counters. 由于基站510知道这个数据分组不是意欲用于它本身,基站510甚至没有必要解码该数据分组。 Since the base station 510 knows that the data packet is not intended for itself, the base station 510 is not even necessary to decode the data packet. 这个方法的一个额外的好处是,当偶然发生这种情况的时候,基站可以很早就检测其不是数据分组意欲的接收方,因此该基站不需要解码该数据分组的其余部分。 An additional advantage of this method is that when this happens by chance, the base station can detect very early data packets that it is not the intended recipient, so that the base station does not need to decode the remainder of the data packet. 这将节省例如在基站的功率,因为该基站不会耗费解码该数据分组的其余部分的处理功率,因此该基站例如可以进入低功率模式。 This will save power at the base station, for example, because the base station does not consume the processing power of the rest of the decoding of the data packet, so that for example, the base station may enter low power mode.

[0088] 通信路径6 :传统基站530偶然地接收来源于ER使能基站510的数据分组。 [0088] Communication Path 6: a conventional base station 530 accidentally receives from ER to enable the base station 510 data packets.

[0089] 这种情形产生如相对于通信路径3示出了的相同的结果。 [0089] This situation with respect to the communication path such as to generate 3 shows the same results.

[0090] “欺骗”速率和长度字段。 [0090] "cheat" rate and length fields.

[0091] 当传统基站接收一个ER数据分组的时候,诸如在通信路径3和6中,该传统基站必须能够基于包含在该ER分组报头的第一码元中的标准802. 11报头,确定该数据分组的持续时间,即分组传输需要的时间,该报头每个基站可以正确地解码。 [0091] When the conventional base station receives a data packet when the ER, such as the communication path 3 and 6, the conventional base station must be able to be included in the ER based on the packet header of the first symbol in the standard 802.11 header, determining the duration of the data packet, i.e. the time required for packet transmission, the header of each base station can be correctly decoded. 因此,对于该传统基站,R1-R4位对于ER使能RX STA不具有任何的意义,其必须被设置为一个在802. Ila标准中使用的合理的模式,在表I中示出。 Thus, for the conventional base station, R1-R4 for the ER bit is enabled RX STA does not have any meaning, it must be set to a reasonable model for use in 802. Ila standard, are shown in Table I. 另外,该长度字段必须以一种方式和速率字段一起填写,这种方式是基于“欺骗的”速率和长度参数将与使用优化的通信参数的ER RX STA所需的那个重合,该传统RX STA计算数据分组传输所需的时间。 Further, the length field must be filled together in a manner and rate fields, this approach is based on the coincidence "cheated" rate and length parameters with the use of optimized communication parameters of ER RX STA desired, this conventional RX STA computing data packet transmission time required. 这将保证该传统基站正确地设置其网络分配矢量和其他相关的计数器,因此,将保持用于介质访问的争用算法精确的操作。 This will ensure that the conventional base station set its network allocation vector and other related counters correctly, therefore, will remain with the contention algorithm for the medium access precise operation.

[0092] 当数据分组不是意欲用于ER使能RX STA接收的时候,诸如在情况2和5下,ER使能RX STA将也采用在信号字段中示出的欺骗的速率、长度信息。 [0092] When the data packet is not intended to be used to enable RX STA receiving ER, such as in the case of 2 and 5 under, ER enable RX STA will also use the rate shown in the signal field of deception, the length of the message. 一旦ER使能RX STA确认保留的位R被接通,该ER使能RXSTA检查扩展信号码元,并且基于该RX STA ID,确定这个数据分组不是意欲用于它本身。 Once confirmed ER enable RX STA reserved bit R is turned on, the ER expansion enables RXSTA check signal element, and based on the RX STA ID, determine the data packet is not intended for itself. 基于在该信号字段中的该“欺骗的”速率和长度信息,该RX STA以完全和传统基站相同的方式,以涉及虚拟载波感测(virtual carrier sense)算法设置该计数器,然后可以进入功率节省模式。 The "cheated" based on the rate and length information in the signal field, and the RX STA completely the same manner as the conventional base station, in order to relate virtual carrier sensing (virtual carrier sense) algorithm sets the counter, and then can enter the power saving mode.

[0093] 作为一个例子,该ER数据传输速率是108Mbps,其是常规的802. Ila系统的最大数据传输速率(54Mbps)的两倍。 [0093] As an example, the ER data transfer rate is 108Mbps, which is twice the conventional system 802. Ila maximum data transmission rate (54Mbps) of. 这可以通过例如位加载和使用格状编码调制来实现。 This can be loaded and used by, for example bit trellis-coded modulation to achieve. 以108Mbps发射的系统每个码元将具有432个数据位。 System to 108Mbps transmitted for each symbol having 432 data bits. 因此,例如以864个字节发送一个数据分组将需要864*8/432=16个码元。 Thus, for example, 864 bytes will be required to send a data packet 864 * 8/432 = 16 symbols. 此外,与标准802. Ila系统相比较,该ER协议需要在ER报头中附加一个码元,其包含TX和RX基站ID。 Furthermore, compared to standard 802. Ila system, which requires additional in ER ER protocol header of a symbol, which comprises a base station TX and RX ID. 因此,一个864个字节数据分组以108Mbps发送需要16+1=17码元。 Therefore, a 864-byte data packets to transmit 108Mbps need 16 + 1 = 17 symbols. 为了允许传统802. Ila基站正确地确定网络分配矢量,速率和该ER报头的长度字段需要被设置,使得该传统基站也将确定对该数据分组的发送需要17个码元。 In order to allow the conventional base station 802. Ila correctly determine network allocation vector, and the length field rate ER header needs to be set so that the conventional base station will transmit the data packet to determine takes 17 symbols. 因此,例如该速率和长度字段可以被设置为速率=54Mbps,和长度=459个字节。 Thus, for example the rate and length field may be set to a rate = 54Mbps, and length = 459 bytes. 在这种情况下,由于54Mbps导致每个码元216个数据位,传统基站将确定数据分组持续时间是459*8/216=17个码元,并且正确地设置该网络分配矢量。 In this case, since 54Mbps causes each symbol 216 data bits, a traditional base station determines the duration of the data packet is 459 * 8/216 = 17 symbols, and setting the network allocation vector correctly. 显而易见,可以使用来源于802. Ila标准其他的速率和长度组合,以能够使该传统基站正确地设置网络分配矢量。 Obviously, you can use the other from 802. Ila standard rate and length combinations to be able to make the traditional base to correctly set the network allocation vector. 例如,速率=6Mbps和长度=51字节也将导致一数据字段是17个码元长的数据分组。 For example, rate = 6Mbps and length = 51 bytes will result in a data field is a data packet length of 17 yards element.

[0094] 在如上所述的例子中,该扩展的报头字段仅包含RX和TX STAID。 [0094] In the example described above, the extended header field contains only the RX and TX STAID. 这暗示对于每个TX/RX通信仅存在一组优化的参数。 This implies a set of optimized parameters for each TX / RX communication exist only. 在另一个实施例中,该扩展的报头字段也(或者可选择地)包含一个指示,表明多个优化的通信参数组的哪一个将被用于数据分组的发送和接收。 In another embodiment, the extension header field is also (or alternatively) contain an indication that the sending and receiving a plurality of optimized communication parameter set which will be used for the data packet. 这些参数组从接收机基站发送到发射机基站,并且在每个中保存。 These parameter sets transmitted from the receiver station to the transmitter station, and stored in each of the.

[0095] 以上所述的通信系统可以在有线或者无线通信设备上实施,诸如调制解调器、多载波调制解调器、DSL调制解调器、ADSL调制解调器、XDSL调制解调器、VDSL调制解调器、多载波收发机、有线或者无线广域网/局域网络系统等等,或者在具有通信设备的分离的编程通用计算机上实施。 [0095] communication systems described above can be on a wired or wireless communications device implementation, such as a modem, a multicarrier modem, DSL modem, ADSL modem, XDSL modem, VDSL modem, multicarrier transceiver, a wired or wireless wide area network / local area network system, etc., or implemented on a separate programmed general purpose computer having a communication device. 另外,本发明的系统、方法和协议可以在专用计算机、编程的微处理器或者微控制器和外部集成电路单元、ASIC或者其他的集成电路、数字信号处理器、硬连线电子或逻辑电路,诸如分立元件电路、可编程序逻辑设备(诸如PLD、PLA、FPGA、PAL),调制解调器,发射机/接收机等等上实施。 In addition, systems, methods and protocols of the present invention may be a special purpose computer, a programmed microprocessor or microcontroller and an external IC unit, ASIC or other integrated circuit, a digital signal processor, a hardwired electronic or logic circuits, such as discrete element circuit, a programmable logic device (such as a PLD, PLA, FPGA, PAL), a modem, a transmitter / receiver and the like embodiment. 通常,能够执行状态机的任何的设备可用于执行根据本发明的不同的通信方法,该状态机随后能够执行在此处示出的流程图。 In general, any device capable of executing a state machine may be used to perform different communication method according to the present invention, the state machine is then able to flow chart illustrated herein executed.

[0096] 此外,公开的方法可以容易地以使用对象或者面向对象的软件开发环境的软件来实现,其提供可以在各种计算机或者工作站平台上使用的可移植的源代码。 [0096] Furthermore, the disclosed method can be easily using object or object-oriented software development environment software to achieve, which provides portable source code that can be used on a variety of computer or workstation platforms. 另外,公开的通信系统可以使用标准逻辑电路或者VLSI设计而部分或者完全地用硬件来实现。 In addition, the disclosed communication system may use standard logic circuits or VLSI design partially or completely implemented in hardware. 使用软件还是硬件来实现根据本发明的系统,取决于该系统的速度和/或效率需求,以及被使用的特定的功能和特定的软件或者硬件系统或者微处理器或者微型计算机系统。 Whether software or hardware to implement the system according to the present invention, depending on the speed of the system and / or efficiency requirements, as well as the particular function is used and the particular software or hardware systems or microprocessor or microcomputer systems. 但是,在此处示出了的通信系统、方法和协议可以容易地由本领域技术人员从在此处提供的功能描述中,使用任何已知的或者稍后开发的系统或者结构、设备和/或软件,和借助计算机和远程通信领域常规的基础知识,以硬件和/或软件来实现。 However, in a communication system is shown herein, methods and protocols can be readily by one skilled in the art from the functional description provided herein, using any known or later developed systems or structures, devices and / or software, and the use of computer and the basics of conventional remote communications, hardware and / or software.

[0097] 此外,公开的方法可以容易地以在编程的通用计算机、专用计算机、微处理器等等上执行的软件来实现。 [0097] Furthermore, the disclosed methods may be readily implemented in software on a programmed general purpose computer, special purpose computer, microprocessor, etc. executed to achieve. 在这种情况下,本发明的系统和方法可以作为嵌入在个人计算机上的程序,诸如JAVA或者CGl文字,作为驻留在服务器或者图形工作站上的资源,作为嵌入在专用通信系统中的例行程序等等来实现。 In this case, the system and method of the present invention can be used as program embedded on personal computer program, such as JAVA or CGl text, as a resource residing on a server or graphics workstation, as embedded in a dedicated communication system of Example line program, etc. to achieve. 该通信系统还可以通过物理上将该系统和方法结合到一个软件和/或硬件系统之中来实现,例如通信收发机的硬件和软件系统。 The communication system may also be incorporated by physically to the system and method into a software and / or hardware system to implement, such as hardware and software systems of communication transceivers.

[0098] 因此很明显的,已经提供了根据本发明用于交换通信参数的系统和方法。 [0098] Thus it is clear there has been provided a system and method according to the present invention for exchanging communication parameters. 虽然已经结合多个实施例描述了本发明,很明显,很多的替换、修改和变化对于那些本领域技术人员将是显而易见的。 While various embodiments have been described in conjunction the present invention, it is clear that many alternatives, modifications and variations to those skilled in the art will be apparent. 因此,本发明的精神和范围之内所有的上述的替换、修改、等效和变化将包含在权利要求书中。 Thus, all of the above alternatives, modifications, equivalents and variations within the spirit and scope of the invention as contained in the claims.

Classifications
International ClassificationH04L12/28, H04L12/56, H04L12/26, H04L29/06, H04L1/16, H04J3/16, H04L27/26, H04L1/00, H04L5/14
Cooperative ClassificationH04L27/2601, H04W24/02, H04L27/2602, H04L1/1671, H04W28/22, H04L5/0055, H04W24/08, H04L27/2649, H04W84/12, H04L5/1438, H04L1/0028, H04L27/2607, H04W28/18, H04L5/0094, H04W28/06, H04L69/24, H04W28/04
European ClassificationH04L5/14R, H04L1/00A9F, H04W28/18, H04L29/06P, H04L27/26M1, H04L27/26M1G1
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