CN101453303B - Method for determining signaling overhead and radio resource utilization, base station and user equipment mobile terminal - Google Patents
Method for determining signaling overhead and radio resource utilization, base station and user equipment mobile terminal Download PDFInfo
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- CN101453303B CN101453303B CN200910001226.2A CN200910001226A CN101453303B CN 101453303 B CN101453303 B CN 101453303B CN 200910001226 A CN200910001226 A CN 200910001226A CN 101453303 B CN101453303 B CN 101453303B
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- 238000005259 measurement Methods 0.000 claims abstract description 57
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Abstract
The invention dicloses a method for determining signalling spenses and wireless resource utilization, base station and user equipment mobile terminal(UE). A wireless digital communication method for communicating between a base station and a plurality of user equipment mobile terminals (UEs) and employs adaptive modulation and coding (AM&C) to achieve improved radio resource utilization and provide optimum data rates for user services. Blocks of downlink (DL) data are received by the base station which requests downlink DL channel quality measurements only from those mobile terminals (UEs) with pending downlink transmissions. The UEs respond to the request by measuring and reporting DL channel quality to the base station, which then allocates resources such that the UEs will make best use of radio resources. The base station notifies the UEs of the physical channel allocation indicating the modulation/coding rate and allocated slots followed by transmission of blocks of downlink data which are transmitted to the UEs.
Description
Related application
The application is that application number is 02809876.5, and name is called the dividing an application of Chinese invention patent application of " dynamic channel quality measurement of adaptive modulation and coding techniques ".
Technical field
The present invention is about wireless communication system.Especially, the invention relates to the communication station of employing code division multiple access (code division multiple access, CDMA) technology.The present invention is the wireless conditions about being identified for effectively utilizing radio resource utilization rate and selecting the data rate of user's service particularly.
Background technology
In the code division multiple access third generation (3G) cellular communication system, adaptive modulation and coding techniques (adaptive modulation and coding, AM & C) be applied to transmission to reach the radio resource utilization rate of improvement, and user's service data rate of increase is provided under suitable situation.These AM & C technology are listed wireless transmission situation in consideration in advance, to determine from use the current radio propagation conditions of these technology, obtain useful modulation and code rate.
When using these AM & C technology, need to, before each transmission, from receiver, provide the program of physical channel quality measurement.Based on this quality measurement, transmitter is determined applicable modulation and the code rate of specific transmission.
In cdma system, as with any wireless system, wireless conditions may because nature or artificial situation the two extensive variation and change fast.Because channel quality measurement is used to determine transmission modulation and coding, and because the situation of transmission path changes the quick change of the channel quality producing, adaptability transmission process is that the time cycle length between the time directly starting with time and the transmission of the measurement of execution channel quality is relevant.
Physics or logical control channel is used to channel quality to measure and transfer to transmitter from receiver subsequently.Channel quality signaling (signaling) can be used the special-purpose control channel of each subscriber equipment (user equipment, UE) or the Common Control Channel of being shared by all UE.UE can be cellphone (cell phone), PDA(personal digital assistant) or the wireless device of other type.When Dedicated Control Channel is used, the overtime existence of propagation that the channel quality that continuous signaling channel is each UE is measured.This is ideal, the solution of AM & C, because the lasting existence of quality measurement.The quality measurement of considering the sustainable existence of suitable modulation and coding setting use, transmission can at any time occur.Therefore, be always present in the mode of up link (uplink) with Dedicated Control Channel, channel can be used to support low rate uplink data transmission.
Use the difficulty of Dedicated Control Channel method to be, even if still continue to distribute physical layer resources when there is no transfer of data.The main application of AM & C technology is non real-time high data rate service, for example, and the Internet access.For the grade of these services, best service quality (QoS) is reached with the idle period between transmission short, that tool is quite long.These long idle periods produce the low usefulness that private resource is used.This restriction can access service number of users.
This problem can rely on pre-configured periodicity dedicated channel and be reduced to minimum.But this causes the periodically available of quality measurement.If quality measurement is not available continuously, for producing at any time the UE transmitting, only have some UE will there is nearest channel quality and measure, so the selection of UE transmission will becomes inferior good.
Another way is the use of Common Control Channel.With the use of Common Control Channel, there is the continuous signaling channel that in Yi Geyou community, all UE are shared.Determine that each UE is defined the program of co-controlling channel access.UE identification is used to distinguish specific business.
Support the difficulty of the co-controlling method of AM & C to be to measure each UE a large amount of signaling consumption required to control channel access.As previously mentioned, UE identification be need to distinguish the special business of UE.Therefore, for avoiding the competition of take of up link Common Control Channel, be basic access, indivedual distribution of each the UE access in down link (downlink) Common Control Channel need signaling.Because up link is not always expected, the periodic allocation of uplink control channel must send with signal on downlink control channel, and it produces sizable signaling consumption.Meanwhile, shared control method does not provide low rate, uplink data transmission.
Comprehensive speech, the efficiency of AM & C technology is mainly the benefit of the nearest physical channel quality measurement based on prior each transmitter from receiver.Preferably, measure with have dynamic data transmission all users minimum delay and exist.This Dedicated Control Channel solution provides continuous measurement, but because transmission is discontinuous, this use to radio resource is inefficent.It is minimum that the Dedicated Control Channel periodically designing makes radio resource demand, but this has increased the delay of measuring.Co-controlling channel method can provide measurement in continuous or cycle basis, but makes signaling consumption cause the poor efficiency of radio resource to be used.
Needing to provide the method with low delay and low signaling consumption.
Summary of the invention
The invention provides a kind ofly for sending the method for down link data, the method comprises: receive the down link data that is assigned to subscriber equipment; Transmission is to providing the request of channel quality CQ measurement report to specified subscriber equipment; In response to described request, come only from specified subscriber equipment, to receive CQ measurement report; In response to the CQ measurement report receiving, with signal, send the specified subscriber equipment of being assigned to of radio resource, wherein the CQ measurement report based on receiving and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality; And transmit the down link data that receives to specified subscriber equipment according to the described distribution to radio resource.
The present invention also provides a kind of base station to be configured to receive the down link data that is assigned to subscriber equipment, and this base station comprises: transmitter, and being configured to provides the channel quality CQ request of measurement report to specified user device transmissions; Receiver, is also configured in response to described request only from specified subscriber equipment, receive CQ measurement report; And described transmitter is also configured to send the specified subscriber equipment of being assigned to of radio resource with signal in response to described CQ measurement report, and described transmitter is also configured to transmit the down link data that receives to specified subscriber equipment according to the described distribution to radio resource, wherein based on described CQ measurement report, from high channel quality to lowest channel quality, arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource.
The present invention also provides a kind of method for receiving downlink data, and the method comprises: before reception is only assigned to the down link data of subscriber equipment subscriber equipment, at subscriber equipment place, receive the channel quality CQ request of measurement report is provided; In response to described request, come from described user device transmissions CQ measurement report; Receive the distribution to radio resource for described subscriber equipment, the described distribution to radio resource is CQ measurement report based on being transmitted; And carry out receiving downlink data according to the described distribution to radio resource, wherein based on described CQ measurement report and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality.
The present invention also provides a kind of subscriber equipment mobile terminal, and this subscriber equipment comprises: receiver, is configured to, before reception is only assigned to the down link data of subscriber equipment, receive the channel quality CQ request of measurement report is provided; Transmitter, is configured to transmit CQ measurement report in response to described request; And described receiver is also configured to receive the distribution to radio resource, the described distribution to radio resource is CQ measurement report based on being transmitted, and described receiver is also configured to carry out receiving downlink data according to the described distribution to radio resource, wherein based on described CQ measurement report and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality.
Accompanying drawing explanation
Object of the present invention is based on appended detailed description and graphic and become clearer, wherein:
Fig. 1 is the preferably flow chart of dynamic channel quality measurement program (dynamic channel quality management procedure, DCQMP) of the present invention.
Another embodiment of DCQMP of the present invention shown in Fig. 2 presentation graphs l.
Embodiment
Shown preferred embodiment is in below with reference to appended graphic and be described, and wherein identical label represents identical assembly all the time.
Figure l is the flow chart of dynamic channel quality of the present invention (channel quality, CQ) process of measurement 60, and it can be implemented by means of having base station/Node B (hereinafter referred to as base station 12) radio digital communication system of communicating by letter with at least one UE 30.Although the inventive method presenting is intended to support communicating by letter between a base station and a plurality of UE, be brief description therefore, following description will describe in detail by the performed step of single UE, apprehensible is that all other UE will operate in the same manner.
Down link (DL) data are transferred to the base station 12(step Sl that is assigned to particular UE 30).
The reception of base station 12 response down link datas also asked only from the DL CQ with the UE 30 of unsettled downlink transmission, to measure (step S2) before transferring to UE 30.
UE 30 receives this request and reports that in step S4 this DL CQ measures to base station 12 at step S3.
CQ measurement report (step S5) based on receiving from each UE, base station 12 determines which UE will have best radio resource service efficiency, and determines and use which time slot (slot) (step S6).Preferably, this UE relies on its CQ and is arranged order of priority, therefore, has the UE of the highest CQ and is first transmitted data, and the UE then with the second high CQ is then transmitted its data, and the rest may be inferred, until have the data of the UE of minimum CQ, is finally transmitted.
Because CQ measures the CQ report of request and response and only produces when needed, the required signaling consumption of Common Control Channel can significantly reduce.Measurement report exists for the transmission user in all activities, similar Dedicated Control Channel, but avoided the inefficiency of the resource in idle period to use.
The order of priority of transmission is measured and determines according to DL CQ, and the distribution of DL physical channel is sent to applicable UE, the time slot of indicating specific code rate, modulation type and distributing (step S7) with signal.The time slot (step S8) that appointed UE receives this code rate, modulation type and distributes, and set the parameter (step S9) that these receive use.
After the execution of step S7, after predetermined but short time, downlink data block is sent to appointed UE 30(step S10 by base station 12 subsequently), set with the time of the reception use of activation UE 30.UE 30 is at specific code rate, modulation type and receiving downlink data in the time slot of the specified distribution of step S7.
Therefore the present invention provides AM & C to operate required basal needs and maintains radio resource is the most effectively used.Because DL CQ measures with minimum may the delay of all transmission and exists, the selection that is provided one of service or multidigit user in next transmission time frame can reach best.In addition, by the measurement that periodically or continuously mechanism provides, do not provide interests, gain of performance or the reinforcement increasing than the present invention.
Enforcement of the present invention also makes process of measurement process and relevant consumed power is minimum, and the UE generally being powered by the small-power of limit capacity (that is, a rechargeable battery) is even more important.Because quality measurement be only a specific active transmission and requested, the number of required measurement can be reduced to minimum.
The present invention provides many advantages in known techniques.First, the invention provides the use of the peak efficiency of air interface, because only have those UE with transmission need to respond the request that DL CQ measures.This allows signaling consumption is minimum.
Secondly, because transmission is measure and arranged order of priority by row according to the most high-quality DL CQ, the admissible peak data rate of each time slot or multi-slot can be reached.
The 3rd, because UE only needs to respond the request that DL CQ measures, will not need the unwanted measurement of UE, save by this UE battery life.
Last advantage of the present invention is the increase of the number of users that can support in the community of the method that disclose in this place.The user's who is supported number is limited by the demand of dedicated radio resource in Dedicated Control Channel method: and by signaling consumption demand, limited in Common Control Channel method.Rely on the measurement signaling procedure of restriction to active user, the present invention makes the signaling consumption of sharing control be minimum and support number of users maximum in community.
Although the present invention is described with most preferred embodiment, other fall into as the variation of the scope of the invention described in claim will be obvious to those skilled in the art.
Claims (8)
1. for sending a method for down link data, the method comprises:
Reception is assigned to the down link data of subscriber equipment;
Transmission is to providing the request of channel quality CQ measurement report to specified subscriber equipment;
In response to described request, only from specified subscriber equipment, receive CQ measurement report;
In response to the CQ measurement report receiving, with signal, send the specified subscriber equipment of being assigned to of radio resource, wherein the CQ measurement report based on receiving and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality; And
According to the described distribution to radio resource, transmit the down link data receiving and arrive specified subscriber equipment.
2. method according to claim 1, the wherein said distribution to radio resource comprises at least one in code rate and modulation type.
3. a base station, is configured to receive the down link data that is assigned to subscriber equipment, and this base station comprises:
Transmitter, being configured to provides the channel quality CQ request of measurement report to specified user device transmissions;
Receiver, is configured in response to described request only from specified subscriber equipment, receive CQ measurement report; And
Described transmitter is also configured to send the specified subscriber equipment of being assigned to of radio resource with signal in response to described CQ measurement report, and described transmitter is also configured to transmit the down link data that receives to specified subscriber equipment according to the described distribution to radio resource, wherein based on described CQ measurement report, from high channel quality to lowest channel quality, arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource.
4. base station according to claim 3, the wherein said distribution to radio resource comprises at least one in code rate and modulation type.
5. for a method for receiving downlink data, the method comprises:
Before reception is only assigned to the down link data of subscriber equipment, at this subscriber equipment place, receive the channel quality CQ request of measurement report is provided;
In response to described request from described user device transmissions CQ measurement report;
Receive the distribution to radio resource for described subscriber equipment, the described distribution to radio resource is CQ measurement report based on being transmitted; And
According to the described distribution to radio resource, carry out receiving downlink data, wherein based on described CQ measurement report and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality.
6. method according to claim 5, the wherein said distribution to radio resource comprises at least one in code rate and modulation type.
7. a subscriber equipment, this subscriber equipment comprises:
Receiver, is configured to, before reception is only assigned to the down link data of subscriber equipment, receive the channel quality CQ request of measurement report is provided;
Transmitter, is configured to transmit CQ measurement report in response to described request; And
Described receiver is also configured to receive the distribution to radio resource, the described distribution to radio resource is CQ measurement report based on being transmitted, and described receiver is also configured to carry out receiving downlink data according to the described distribution to radio resource, wherein based on described CQ measurement report and arrange the order of priority of subscriber equipment and the order of priority based on from high channel quality to lowest channel quality to the distribution of radio resource from high channel quality to lowest channel quality.
8. subscriber equipment according to claim 7, the wherein said distribution to radio resource comprises at least one in code rate and modulation type.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29087701P | 2001-05-14 | 2001-05-14 | |
| US60/290,877 | 2001-05-14 | ||
| US10/029,569 | 2001-12-21 | ||
| US10/029,569 US6810236B2 (en) | 2001-05-14 | 2001-12-21 | Dynamic channel quality measurement procedure for adaptive modulation and coding techniques |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028098765A Division CN100464599C (en) | 2001-05-14 | 2002-04-15 | Dynamic channel quality measurement procedure for adaptive modulation and coding techniques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101453303A CN101453303A (en) | 2009-06-10 |
| CN101453303B true CN101453303B (en) | 2014-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910001226.2A Expired - Lifetime CN101453303B (en) | 2001-05-14 | 2002-04-15 | Method for determining signaling overhead and radio resource utilization, base station and user equipment mobile terminal |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101453303B (en) |
| NO (1) | NO335395B1 (en) |
| SG (1) | SG134173A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065552B (en) * | 2009-11-17 | 2013-05-22 | 大唐移动通信设备有限公司 | Method and device for reporting BSR (Buffer Status Report) |
| KR101510582B1 (en) | 2011-06-15 | 2015-04-08 | 삼성전자주식회사 | Extension of physical downlink control signaling in a communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5701294A (en) * | 1995-10-02 | 1997-12-23 | Telefonaktiebolaget Lm Ericsson | System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network |
| CN1269684A (en) * | 1999-04-07 | 2000-10-11 | 株式会社东芝 | Mobile terminal having function of asking for switching-over, switching-over control apparatus and method and storage medium |
| WO2000072496A1 (en) * | 1999-05-20 | 2000-11-30 | University Of Southampton | Adaptive joint-detection cdma video transceiver |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0936799A (en) * | 1995-07-21 | 1997-02-07 | Toshiba Corp | Radio communication equipment |
| US5745480A (en) * | 1996-04-03 | 1998-04-28 | Adicom Wireless, Inc. | Multi-rate wireless communications system |
| FI103850B (en) * | 1996-07-12 | 1999-09-30 | Nokia Mobile Phones Ltd | Automatic control of communication mode |
| US6167031A (en) * | 1997-08-29 | 2000-12-26 | Telefonaktiebolaget Lm Ericsson (Publ) | Method for selecting a combination of modulation and channel coding schemes in a digital communication system |
| ES2214356T3 (en) * | 1998-04-17 | 2004-09-16 | Matsushita Electric Industrial Co., Ltd. | RADIO AND METHOD COMMUNICATION DEVICE TO CONTROL THE TRANSMISSION SPEED. |
| US6421527B1 (en) * | 1998-05-21 | 2002-07-16 | Texas Instruments Incorporated | System for dynamic adaptation of data/channel coding in wireless communications |
-
2002
- 2002-04-15 CN CN200910001226.2A patent/CN101453303B/en not_active Expired - Lifetime
- 2002-04-15 SG SG200508511-3A patent/SG134173A1/en unknown
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2010
- 2010-12-08 NO NO20101711A patent/NO335395B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5701294A (en) * | 1995-10-02 | 1997-12-23 | Telefonaktiebolaget Lm Ericsson | System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network |
| CN1269684A (en) * | 1999-04-07 | 2000-10-11 | 株式会社东芝 | Mobile terminal having function of asking for switching-over, switching-over control apparatus and method and storage medium |
| WO2000072496A1 (en) * | 1999-05-20 | 2000-11-30 | University Of Southampton | Adaptive joint-detection cdma video transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| NO20101711L (en) | 2004-01-13 |
| NO335395B1 (en) | 2014-12-08 |
| CN101453303A (en) | 2009-06-10 |
| SG134173A1 (en) | 2007-08-29 |
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| CN101453303B (en) | Method for determining signaling overhead and radio resource utilization, base station and user equipment mobile terminal |
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