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A method, system and device for control channel resource mapping

A control channel resource and control channel technology, which is applied in the field of control channel resource mapping, can solve the problems of waste of resources, no control channel interference randomization, and increased coding complexity, so as to reduce complexity, enhance anti-interference ability, Effect of Increasing Frequency Diversity Gain

Active Publication Date: 2008-08-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, in the above solution, since the original control information is fixed, when the original control information is encoded according to the specified code rate, for the situation where the size of the CE in the prior art is constantly changing, the control signaling encoding needs to use more rates. Matching methods, such as bit repetition or punching, etc., which increase the complexity of encoding and also bring a certain degree of waste of resources
In addition, this scheme does not give the implementation scheme of the control channel interference randomization

Method used

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  • A method, system and device for control channel resource mapping
  • A method, system and device for control channel resource mapping
  • A method, system and device for control channel resource mapping

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specific Embodiment 1

[0106] see Figure 5 , Figure 5 It is a flow chart of the control channel resource mapping method in Embodiment 1 of the present invention. In this embodiment, it is assumed that the size of the CRB has been predetermined according to the method described in step 201 . Such as Figure 5 As shown, the process includes the following steps:

[0107] Step 501, according to the ratio of the number of REs that can be used for control channel transmission in each available OFDM symbol, determine the size of the CRB unit that the CRB can divide.

[0108] In this step, the ratio of the number of REs of the CRB on each available OFDM symbol can be determined according to the ratio of the number of REs that can be used for control channel transmission in each available OFDM symbol. to determine the number U of REs to be mapped to CRB units that can be divided into CRBs.

[0109] Assume that the number of REs that N OFDM symbols can use for the control channel is O 0 , O 1 ,...,O ...

specific Embodiment 2

[0141] see Figure 8 , Figure 8 It is a flow chart of the control channel resource mapping method in the second embodiment of the present invention. In this embodiment, it is still assumed that the size of the CRB has been predetermined according to the method described in step 201 . Such as Figure 8 As shown, the process includes the following steps:

[0142] Step 801, according to the ratio of the number of REs that can be used for control channel transmission in N available OFDM symbols, determine when the REs in each OFDM symbol are divided into control units, the size u of the control unit in each available OFDM symbol 0 , u 1 ,...,u N-1 .

[0143] Assume that the number of REs available for the control channel within n OFDM symbols is O 0 , O 1 ,...,O N-1 , then when the REs in N OFDM symbols in each control subband are divided into P control units of equal size, the size u of the control units in each available OFDM symbol 0 , u 1 ,...,u N-1 , satisfying t...

specific Embodiment 3

[0164] see Figure 11 , Figure 11 It is a flow chart of the control channel resource mapping method in the third embodiment of the present invention. In this embodiment, it is still assumed that the size of the CRB has been predetermined according to the method described in step 201 . Such as Figure 11 As shown, the process includes the following steps:

[0165] Step 1101: Divide the available bandwidth of the control channel in the available OFDM symbols into M control subbands.

[0166] In this embodiment, the value of M may be determined according to empirical values ​​or actual needs, and then the available bandwidth of the control channel in the available OFDM symbols is divided into M control subbands. In addition, the divided M control subbands may be numbered according to frequency sequence in the frequency direction. For example: from high frequency to low frequency or from low frequency to high frequency, they are numbered as the 0th, 1st, and M-1th control su...

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Abstract

The invention discloses a channel resource mapping controlling method, including: dividing available bandwidth of controlling channels within N available orthogonal frequency division multiplexing (OFDM) symbols into M controlling sub-bands; mapping control resource block (CRB) with determined capacity of C resource elements (RE) onto C RE in M controlling sub-bands; allocating a integral number of CRB for control signaling bearing control channel, mapping mentioned control channel onto mapping resource of allocated CRB, wherein M, N, C are integers bigger than 0. Moreover, the invention also discloses a system and device for controlling mapping of channel resources, which could reduce complexity of coding.

Description

technical field [0001] The present invention relates to a resource mapping technology in a communication system, in particular to a method, system and device for controlling channel resource mapping. Background technique [0002] Currently, in the 3rd Generation Partnership Project (3GPP) Evolved Universal Radio Access (E-UTRA) system, the Orthogonal Frequency Division Multiplexing (OFDM) technology is used as the multiple access mode in the downlink transmission. OFDM is a multi-carrier communication technology. In a multi-carrier communication system, multiple users are multiplexed by allocating different time-frequency resources to different users. [0003] see figure 1 , figure 1 It is a schematic diagram of a time-frequency resource structure in OFDM mode. Such as figure 1 As shown, the time-frequency resource in the OFDM mode is represented by a two-dimensional plane composed of time and frequency. figure 1 Among them, in the time direction, the OFDM symbol is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04L12/56H04J11/00H04L27/26
Inventor 李洋马蒂斯·温斯特姆
Owner HUAWEI TECH CO LTD
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