WO2012155491A1

WO2012155491A1 - Method, device and base station for controlling configuration of channel resources

Info

Publication number: WO2012155491A1
Application number: PCT/CN2011/083084
Authority: WO
Inventors: 鲁照华; 刘锟; 宁迪浩; 段灿
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-08
Filing date: 2011-11-28
Publication date: 2012-11-22
Also published as: CN102264136B; CN102264136A

Abstract

Disclosed in the present invention are a method and device for controlling configuration of channel resources. The method comprises the following step: when the number of data sub-carriers available for an orthogonal frequency division multiplexing (OFDM) symbol on a frequency domain is M, N data sub-carriers are distributed to each control channel, wherein both M and N are positive integers, N is less than or equal to M, and M is dividable by the positive integer N. The present solution can improve the sub-carrier utilization ratio of the OFDM symbol, ensure that the controlling of the channel resource distribution does not require crossing OFDM symbol, and reduce the terminal power consumption and realizing complexity of the terminal.

Description

Control channel resource configuration method, device and base station

Technical field

The present invention relates to the field of mobile communications, and in particular, to a control channel resource configuration method, a configuration apparatus, and a base station.

Background technique

In the communication system, the base station (central access point) transmits control information to the terminal (station) through the control channel, and the control information includes one or more of the following information: downlink resource allocation information, uplink resource allocation information, modulation coding The method, the parameter information related to the multiple input multiple output antenna technology, the feedback channel resource allocation information, the feedback channel index allocation information, and the like, and the terminal performs related operations according to the control information.

In a communication system using Orthogonal Frequency Division Multiplexing (OFDM) technology, the basic parameters of the system are as shown in Table 1. One OFDM symbol includes 256 subcarriers in the frequency domain, where the data subcarrier 224 There are 6 phase tracking pilot subcarriers and 26 virtual subcarriers (protection subcarriers). The Control Channel (CCH) area contains several control channels.

Table 1 Basic parameters of OFDM

Virtual subcarrier index

FFT time window 12. 8us

Cyclic prefix period 1. 6us

OF匪 symbol period 14. 4us Based on the above system, an existing control channel design method is to use four-phase phase shift keying

Quaternary Phase Shift Keying (QPSK) 1/2 modulation and coding mode, each control channel occupies 72 subcarriers and transmits 72 bits of information content. Table 2 shows 72 bits when transmitting uplink and downlink scheduling information in the control channel. Corresponding meanings (other information can be transmitted on 72 bits, and will not be described here).

Table 2 Definition of downlink and uplink scheduling signaling fields

^ ^{= 11} , Request CM I feedback

^ = °, time domain demodulation pilot period 1

^ ⁼¹ , time domain demodulation pilot period 2 h^ = ⁰⁰ , frequency domain demodulation pilot pattern 1

b" = ⁰¹ , frequency domain demodulation pilot pattern 2 b^ = ¹⁰ , frequency domain demodulation pilot pattern 3

=11, frequency domain demodulation pilot pattern 4

MCS and parallel space stream number of codeword 11

Show

1111111, this transmission is SU-MIM0 no

Code word II

1111110, this transmission is 2 streams

MU-MIM0

Κ ···3⁄42 , BitMap indicates CQI,

1111101, this transmission is 3 streams MU-MIM0

CSI, BFM or CMI feedback bandwidth 1111100, this transmission is 4 streams

Έ43 i , for CSI feedback, indicate MU-MIM0

3⁄49 0... 3⁄45

The number of rows in the feedback matrix; for BFM feedback,

1111011, this transmission is 5 streams MU-MIM0

1111010, this transmission is 6 streams, indicating the number of columns of the feedback matrix MU-MIM0

1111001, this transmission is 7 streams MU-MIM0

1111000, this transmission is 8 streams

MU-MIM0

0000000-1100011, SU- MIM0 code word

11 MCS and number of streams

= ₀ , · -b ₅₂ indicates resources for signaling and feedback transmission within the user resource

Κ Κι···Κ 3⁄46 =1 , ...b ₅₁ indicates the signaling/feedback channel start number; indicates the number of occupied signaling/feedback channels ^b ^ ^{= 0} , do not use STBC transmission

^ ^{= 1} , using STBC transmission

κ ··· CRC check protection and STA ID identification

Reserve 2b i t s

b5A ^b 55 One OFDM symbol in the system contains 224 available data subcarriers, so one OFDM symbol can contain up to three control channels while leaving 8 subcarriers. Considering that the system generally uses the resource allocation mode of time division multiple access, that is, the uplink or downlink resources obtained by the terminal are generally integer multiples of the OFDM symbol, and the remaining 8 subcarriers in each OFDM symbol are generally not allocated. The terminal is used for data transmission; Similarly, when a plurality of consecutive OFDM symbols are allocated for use by the control channel, for example, when 8 consecutive OFDM symbols are allocated for use by the control channel, a total of 64 subcarriers cannot be used. In addition, this design imposes a very large limitation on the flexibility of the system's scheduling, and also brings complexity to the design of the terminal's power consumption and cache. Summary of the invention

The technical problem to be solved by the present invention is to provide a control channel resource configuration method and a configuration device, which can improve the subcarrier utilization of the OFDM symbol and/or ensure that the control channel resource allocation does not need to cross OFDM symbols.

In order to solve the above technical problem, the present invention provides a control channel resource configuration method, including: when an OFDM symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel. Where M and N are positive integers, N is less than or equal to M, and N is able to divide M.

The above method can also have the following characteristics:

The control channel is modulated by means of two-phase phase shift keying or intersecting phase shift keying.

The above method can also have the following characteristics:

The coding rate of the control channel is the ratio of Y to X, Y and X are both positive integers, Y is less than or equal to X, and the product of N and Y can be divisible by X.

In order to solve the above technical problem, the present invention also provides a method for configuring a control channel resource. Wherein, when the number of data subcarriers available in the frequency domain of one OFDM symbol is M, N data subcarriers are allocated for each control channel, and the number of OFDM symbols allocated for the control channel is G, according to the control The number of OFDM symbols allocated by the channel determines the usage of the remaining X data subcarriers on each OFDM symbol used for transmitting the control channel, where M and N are positive integers, and N is less than or equal to M. X is the remainder obtained by dividing M by N, and G is a positive integer.

The foregoing method may further have the following features: The step of using the remaining X data subcarriers on each OFDM symbol of the channel includes: N is a product of X and Y, Y is a positive integer, and the value of the G is not Y. All the data subcarriers of the first GS OFDM symbols in the G OFDM symbols are used to transmit the data channel signal, and the remaining X data substrings in the last S OFDM symbols of the G OFDM symbols are configured. No content is transmitted on the carrier or used to transmit the pilot signal, where S is the remainder of G divided by Y.

The above method may also have the following features: The steps of using the remaining X data subcarriers on each OFDM symbol of the channel include: N is the product of X and Y, Y is a positive integer, and the value of the G is Y. An integer multiple of the X data subcarriers remaining on each OFDM symbol is used to transmit a control channel signal.

The above method may also have the following features: The step of using the remaining X data subcarriers on each OFDM symbol of the channel further includes: a data subcarrier on the upper side.

In order to solve the above technical problem, the present invention further provides a method for configuring a control channel resource, where an OFDM symbol allocates N data subcarriers for each control channel when the number of data subcarriers available in the frequency domain is M. The remaining X data subcarriers in each OFDM symbol configured for the control channel are not transmitted or used to transmit a pilot signal, where M and N are positive integers, N is less than or equal to M, and M cannot be N. Divisible, X is the remainder of M divided by N. In order to solve the above technical problem, the present invention further provides a method for configuring a control channel resource, where an OFDM symbol allocates N data subcarriers for each control channel when the number of data subcarriers available in the frequency domain is M. , Z OFDM symbols are set for the control channel, and the product of M and Z can be divisible by N, where M, N, and Z are positive integers, and N is less than or equal to M.

The present invention further provides a method for configuring a control channel resource, wherein, when the number of data subcarriers available in the frequency domain of one OFDM symbol is M, N data subcarriers are allocated for each control channel, and Z is set for the control channel. The OFDM symbols use data subcarriers on the Z OFDM symbols according to a pre-frequency domain back time domain or a first time domain post-frequency domain, where M, N, and Z are positive integers.

The above method can also have the following characteristics:

The base station notifies the terminal of the number of OFDM symbols set for the control channel through the system information channel.

The above method can also have the following characteristics:

The value of M is 224 and the value of N is 74.

In order to solve the above technical problem, the present invention provides a control channel resource configuration apparatus, the configuration apparatus comprising a configuration unit; the configuration unit being configured to configure a control channel resource according to the method described above.

In order to solve the above technical problem, the present invention also provides a base station including the above-described control channel resource configuration apparatus.

The scheme can improve the subcarrier utilization of the OFDM symbol, ensure that the control channel resource allocation does not need to cross the OFDM symbol, and reduce the terminal power consumption and the terminal implementation complexity. BRIEF abstract

1 is a schematic diagram of a method for configuring a control channel resource in Embodiment 1;

2 is a schematic diagram of a method for configuring a control channel resource in Embodiment 2;

3 is a schematic diagram of using data subcarriers in a specific example of Embodiment 2;

4 is a schematic diagram of a method for configuring a control channel resource in Embodiment 3;

5 is a schematic diagram of a method for configuring a control channel resource in Embodiment 4; 6 is a schematic diagram of a method for configuring a control channel resource in Embodiment 5;

7 is a schematic diagram of the use of data subcarriers in a specific example of Embodiment 5. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

Embodiment 1

As shown in FIG. 1, the control channel resource configuration method includes: when one OFDM symbol has a number of data subcarriers available in the frequency domain, each data channel is allocated N data subcarriers, where M and N are A positive integer, N is less than or equal to M, and N is a positive integer that can divide M.

The control channel is modulated by means of Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift Keying (QPSK).

The coding rate of the control channel is a ratio of Y to X, Y and X are both positive integers, and Y is less than or equal to X. Preferably, the product of N and Y can be divisible by X.

Application example 1.1

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 224, and the number of subcarriers N for each control channel is 56. N can divide M.

The number of OFDM symbols occupied by the control channel region is notified to the terminal by the system through a system information channel located before the control channel.

4 When the control channel is BPSK 1/2 encoding, each control channel can carry 28 bits of data.

4 When the control channel is QPSK 1/2 coded, each control channel can carry 56 bits of data. Application example 1.2

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 222, and the number of subcarriers N for each control channel is 74. N can divide M.

4 When the control channel is BPSK 1/2 encoding, each control channel can carry 37 bits of data.

4 When the control channel is QPSK 1/2, the control channel can carry 74 bits of data.

Embodiment 2

As shown in FIG. 2, the control channel resource configuration method includes: when an OFDM symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and OFDM symbols allocated for the control channel. The number of G is determined according to the number G of OFDM symbols allocated for the control channel, and the manner of using the remaining X data subcarriers on each OFDM symbol of the control channel is determined, where M, N All are positive integers, N is less than or equal to M, X is the remainder obtained by dividing M by N, and G is a positive integer.

N is the product of X and Y, that is, N=X*Y, Y is a positive integer, and when the value of G is not an integer multiple of Y, all data subcarriers on the first GS OFDM symbols in the G OFDM symbols are configured. For transmitting a data channel signal, configuring no remaining content on the X data subcarriers remaining on the last S OFDM symbols of the G OFDM symbols or for transmitting a pilot signal, where S is G divided by Y The remainder.

N is the product of X and Y, that is, N=X*Y, Y is a positive integer, and the value of G is an integer multiple of Y (ie, G=Y*Z, Z is a positive integer), and each OFDM symbol is configured. The remaining X data subcarriers are used to transmit control channel signals.

Optionally, the remaining X*Y*Z data subcarriers on the Y*Z OFDM symbols are used to transmit the control channels. Data subcarriers on OFDM symbols.

Application example 2.1

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 224, and the number N of subcarriers occupied by each control channel is 72, and the number of remaining subcarriers of each OFDM X is The remainder (224, 72) is 8, and the usage of the remaining 8 data subcarriers on each OFDM symbol used to transmit the control channel is determined according to the number G of OFDM symbols allocated for the control channel.

The value of N is the product of X and Y, that is, the value of Y is 9.

When the value of G is an integer multiple of Y, that is, when G is 9*Z (Z is a positive integer;), the remaining X data subcarriers on each OFDM symbol used to transmit the control channel are used. To transmit the control channel.

The control channel uses the data subcarriers on the 9*Z OFDM symbols in a manner of a pre-frequency domain back time domain ((a) in Fig. 3) or a pre-frequency domain back time domain.

The number of OFDM symbols allocated for the control channel is notified by the system to the terminal via a system information channel located before the control channel.

Application example 2.2

The value of N is the product of X and Y, that is, the value of Y is 9. When the value of G is not an integer multiple of Y, for example, when G is 3, the remainder of G obtained by dividing Y by Y is 3, and then the remaining 8 data for each OFDM symbol for transmitting the control channel are configured. No content is transmitted on the subcarriers or used to transmit pilot signals. For example, when G is 11, the remainder of the value of S divided by Y is 2, and all data subcarriers used for transmitting the first 9 OFDM symbols of the control channel are used to transmit a data channel. (b)), no content is transmitted on the remaining 8 data subcarriers on each OFDM symbol on the last two OFDM symbols or used to transmit pilot signals.

The control channel uses the remaining 8*9*Z data subcarriers on the 9*Z OFDM symbols to transmit Z control according to the pre-frequency domain post-time domain manner ((b) in FIG. 3) channel.

Embodiment 3

As shown in FIG. 4, the control channel resource configuration method includes: when an OFDM symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and is configured as each of the control channel settings. The remaining X data subcarriers in the OFDM symbol do not transmit any content or are used to transmit pilot signals, where M and N are positive integers, N is less than or equal to M, and M is a positive integer that cannot be divisible by N, and X is The remainder obtained by dividing M by N.

Application example 3

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 224, the number N of subcarriers occupied by each control channel is 72, and the number of remaining data subcarriers X is a remainder. (224, 72) is 8, then no content is transmitted on the remaining 8 data subcarriers on each OFDM symbol used to transmit the control channel or used to transmit pilot signals.

The number of OFDM symbols allocated for the control channel is notified by the system to the terminal via a system information channel located before the control channel. Embodiment 4

As shown in FIG. 5, the control channel resource configuration method includes: when an OFDM symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and Z OFDM is set for the control channel. Symbol, the product of M and Z can be divisible by N, where M, N, and Z are positive integers, and N is less than or equal to M.

Application example 4

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 224, and each control channel occupies 72 subcarriers N, corresponding to an integer multiple of 9 used to transmit the control channel. OFDM symbol.

Embodiment 5

As shown in FIG. 6, the control channel resource configuration method includes: when an OFDM symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and Z OFDM is set for the control channel. The symbol, the data subcarriers on the Z OFDM symbols are used according to a pre-frequency domain back time domain or a first time domain post-frequency domain, where M, N, and Z are positive integers.

Application example 5.1

In a system using OFDM technology, the number M of data subcarriers available for one OFDM symbol in the frequency domain is 224, and each control channel occupies 72 subcarriers N for transmitting 8 OFDM symbols of the control channel. Then, the control channel uses the data subcarriers on the 8 OFDM symbols according to the pre-frequency domain post-time domain "Z-type" mode ((a) in FIG. 7), in this manner, at the 8th OFDM There will be 64 data subcarriers on the symbol that are not used by the control channel.

The number of OFDM symbols allocated for the control channel is located by the system through the control The system information channel before the channel informs the terminal.

Application Examples 5.2

In a system using OFDM technology, the number of data subcarriers available for one OFDM symbol in the frequency domain is 224, and each control channel occupies 72 subcarriers for transmitting 8 OFDM symbols of the control channel. The control channel uses the data subcarriers on the 8 OFDM symbols in a first-time domain post-frequency domain "Z-shape" manner ((b) in FIG. 7).

The control channel resource configuration apparatus includes a configuration unit; the configuration unit is configured to configure the control channel resource according to the method described in the above implementation.

It should be noted that, in Embodiments 1-8, the number of data subcarriers may also be 64, 128, 256, 512, 1024, etc., that is, the power of 2, the relationship between the digital subcarrier index and the actual physical subcarrier index. It depends on the subcarrier mapping mode of the actual system, and will not be described here.

The method provided by the embodiment of the present invention is suitable for a system using OFDM technology, for example, the TC5-WG3-2011-015-Wireless Local Area Network Technical Requirements for High Spectrum Utilization and High Data Throughput, which is being developed in China - Part 2 - Enhanced Super high speed wireless LAN MAC layer and PHY layer "standard text.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program that instructs the associated hardware to be stored in a computer readable storage medium, such as a read only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above embodiments are only intended to illustrate the technical solutions of the present invention and are not to be construed as limiting the invention. It should be understood by those skilled in the art that modifications or equivalents may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention. It is intended to be included within the scope of the appended claims.

Industrial applicability

Embodiments of the present invention can improve the subcarrier utilization of OFDM symbols, ensure that control channel resource allocation does not need to cross OFDM symbols, and reduce terminal power consumption and terminal implementation complexity.

Claims

Claim

A method for configuring a control channel resource, comprising:

When an Orthogonal Frequency Division Multiplexing (OFDM) symbol has a number of data subcarriers available in the frequency domain, M data subcarriers are allocated for each control channel, where M and N are positive integers, and N is smaller than Or equal to M, and N can divide M.

2. The method of claim 1 further comprising:

3. The method of claim 1, wherein

4. A method for configuring a control channel resource, comprising:

When an Orthogonal Frequency Division Multiplexing (OFDM) symbol has a number of data subcarriers available in the frequency domain, M data subcarriers are allocated for each control channel, and the number of OFDM symbols allocated for the control channel is G. Determining, according to the number G of OFDM symbols allocated for the control channel, how to use the remaining X data subcarriers on each OFDM symbol of the control channel, where M and N are positive integers. N is less than or equal to M, X is the remainder obtained by dividing M by N, and G is a positive integer.

5. The method according to claim 4, wherein the number of OFDM symbols allocated for the control channel is determined according to the remaining number of OFDM symbols used for transmitting the control channel.

The steps of using the X data subcarriers include:

N is the product of X and Y, Y is a positive integer, and when the value of G is not an integer multiple of Y, all data subcarriers on the first GS OFDM symbols in the G OFDM symbols are configured for transmitting data channel signals. And configuring, on the X data subcarriers remaining on the last S OFDM symbols of the G OFDM symbols, not transmitting any content or for transmitting a pilot signal, where S is a remainder obtained by dividing G by Y.

6. The method according to claim 4, wherein X remaining for each OFDM symbol used for transmitting the control channel is determined according to the number G of OFDM symbols allocated for the control channel The steps of how the data subcarriers are used include:

N is a product of X and Y, and Y is a positive integer. When the value of G is an integer multiple of Y, the remaining X data subcarriers on each OFDM symbol are configured to transmit a control channel signal.

7. The method of claim 6, wherein the use of the remaining X data subcarriers on each OFDM symbol used to transmit the control channel is determined based on the number G of OFDM symbols allocated for the control channel The steps of the method further include: a data subcarrier on the symbol.

8. A method for configuring a control channel resource, comprising:

When an Orthogonal Frequency Division Multiplexing (OFDM) symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and is configured as the remaining of each OFDM symbol set by the control channel. The X data subcarriers do not transmit any content or are used to transmit pilot signals, where M and N are positive integers, N is less than or equal to M, M cannot be divisible by N, and X is the remainder obtained by dividing M by N.

9. A method for configuring a control channel resource, comprising:

When an Orthogonal Frequency Division Multiplexing (OFDM) symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and Z OFDM symbols are set for the control channel, M and Z. The product of can be divisible by N, where M, N, and Z are positive integers, and N is less than or equal to M.

10. A method for configuring a control channel resource, comprising:

When an Orthogonal Frequency Division Multiplexing (OFDM) symbol has a number of data subcarriers available in the frequency domain, M is allocated N data subcarriers for each control channel, and Z OFDM symbols and subcarriers are set for the control channel. Among them, M, N, and Z are positive integers.

The method according to any one of claims 1 to 10, further comprising: the base station notifying the terminal of the number of OFDM symbols set for the control channel through the system information channel.

12. The method according to any one of claims 2 to 10, wherein the value of M is 224, N takes the value 74.

13. A control channel resource configuration apparatus, comprising: a configuration unit;

The configuration unit is arranged to configure control channel resources according to the method of any of claims 1 to 10.

A base station comprising the control channel resource configuration apparatus of claim 13.