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Method, network side device and user terminal for mapping distributed sub-carrier to physical resource blocks

A technology of physical resource block and carrier mapping, applied in frequency diversity, diversity/multi-antenna systems, baseband system components, etc., can solve the problem of not being able to obtain frequency hopping diversity

Inactive Publication Date: 2008-04-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The present invention provides a method for mapping distributed subcarriers to physical resource blocks, network side equipment and user terminals, to solve the problem in the prior art that frequency hopping diversity cannot be obtained when distributed subcarriers are mapped to physical resource blocks question

Method used

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  • Method, network side device and user terminal for mapping distributed sub-carrier to physical resource blocks
  • Method, network side device and user terminal for mapping distributed sub-carrier to physical resource blocks
  • Method, network side device and user terminal for mapping distributed sub-carrier to physical resource blocks

Examples

Experimental program
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Embodiment 1

[0049] Taking the implementation of distributed subcarrier mapping by the base station on the network side as an example, the frequency hopping sequence is pre-stored in the base station and the user terminal, and the number of elements contained in the frequency hopping sequence is equal to the number of data subframes contained in one frame of data;

[0050] The base station and the user terminal calculate the physical resource block index value of the distributed subcarrier mapping according to the distributed subcarrier mapping method provided in the above-mentioned prior art, that is, the K value, plus the corresponding element value of the frequency hopping sequence, and finally determine each The actual physical resource block location of the distributed subcarrier mapping in the data subframe.

[0051] For example: set the frequency hopping sequence x(n)={0, 3, 1, 4, 2, 5}; the frequency hopping sequence contains six elements, and the element values ​​corresponding to e...

Embodiment 2

[0066] Taking the implementation of distributed subcarrier mapping by the base station on the network side as an example, a conversion table is stored in advance for each data subframe in the base station and user terminal, and the conversion table includes: the physical resource block index value before conversion and the corresponding virtual resource block index value after conversion. index value;

[0067] The base station and the user terminal calculate the physical resource block index value of the distributed subcarrier mapping according to the conventional mapping method, search the corresponding conversion table, obtain the corresponding virtual index value, and use the physical resource block corresponding to the virtual index value as the distributed subcarrier mapping The actual physical resource block.

[0068] For example: N D-PRB = 1, N D = 2, N PRB =12, take the data frame contains six subframes as an example:

[0069] The conversion table corresponding to ...

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Abstract

The invention discloses the method that a distribution type sub-carrier maps on a physical resource block. The method comprises the following steps: the mapping regulation of the physical resource block mapped on by the distribution type sub-carrier in each data subframe of data frame is preset in the network side and the user terminal; the network side maps the distribution type sub-carrier on the corresponding physical resource block in each data frame according to the mapping regulations and transmits the data frame to the user terminal. After receiving the data frame, the user terminal confirms the physical resource block mapped on by the distribution type sub-carrier in each data subframe according to the mapping regulations. The invention also discloses the corresponding network side equipment and the user terminal. The physical resource block in the invention mapped by the distribution type sub-carrier can change with different subframe and hence has frequency hopping diversity.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method for mapping distributed subcarriers to physical resource blocks, network side equipment and user terminals. Background technique [0002] Distributed subcarrier allocation is mostly used in the transmission of control messages and high-speed mobile environments, because it is difficult to allocate subcarriers according to the user's channel quality. The distributed sub-carrier allocation method makes the sub-carriers in each sub-channel distributed on the entire system bandwidth, so that the best frequency diversity effect can be obtained and the interference between cells can be averaged. The centralized subcarrier allocation method can select the best subchannel for each user according to the user's channel response, so as to obtain the optimal multi-user diversity gain. [0003] During the long-term evolution (Long Term Evolution, LTE) standard formulation process, ...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L27/26H04B7/12
Inventor 郑德来吴和兵
Owner HUAWEI TECH CO LTD