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Method and system for implementing channel quality indication information transmission, subscriber terminal and base station

A channel quality indication and user terminal technology, applied in the field of information transmission, can solve the problems of small number of users, unable to support more users to send CQI information at the same time, and achieve the effect of increasing the number

Active Publication Date: 2008-11-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned existing CQI transmission technology, the number of users it accommodates is small, and when there are many users who need to transmit CQI information, this technology cannot support more users to send CQI information at the same time

Method used

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  • Method and system for implementing channel quality indication information transmission, subscriber terminal and base station
  • Method and system for implementing channel quality indication information transmission, subscriber terminal and base station
  • Method and system for implementing channel quality indication information transmission, subscriber terminal and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] On the data time-frequency resource, every other subcarrier constitutes a subresource. The base station informs the terminal that the terminal occupies a sub-resource of the data time-frequency resource, and specifies a Walsh code used by the terminal for sending CQI information by the terminal.

[0039] The CQI information of the terminal is modulated and coded into 6 QPSK symbols. After DFT, 6 signals are output. The terminal puts these 6 signals according to the positions specified by the base station, and inserts 0 in the other 6 positions to form 12 signals; these 12 signals After IFFT processing, a time-domain sampling signal of an OFDM symbol is obtained. The time-domain sampling signal is subjected to block expansion of Walsh codes to obtain time-domain sampling signals of 4 OFDM symbols, and the time-domain sampling signals of these 4 OFDM symbols are processed. sent to the base station.

[0040] The base station receives the CQI information of all terminals o...

Embodiment 2

[0042] On data time-frequency resources, six consecutive subcarriers form a subresource. The base station informs the terminal that the terminal occupies a sub-resource of the data time-frequency resource, and specifies a Walsh code used by the terminal for sending CQI information by the terminal.

[0043] The CQI information of the terminal is modulated and coded into 6 QPSK symbols. After DFT, 6 signals are output. The terminal puts these 6 signals according to the positions specified by the base station, and inserts 0 in the other 6 positions to form 12 signals; these 12 signals After IFFT processing, a time-domain sampling signal of an OFDM symbol is obtained. The time-domain sampling signal is subjected to block expansion of Walsh codes to obtain time-domain sampling signals of 4 OFDM symbols, and the time-domain sampling signals of these 4 OFDM symbols are processed. sent to the base station.

[0044] Embodiment one of the second scheme:

[0045] In this embodiment, th...

Embodiment 2

[0054] In this embodiment, the length N is 24, and the CQI information of the terminal is modulated and coded into a symbol with a length of 4, which needs to be extended by 6 times, and a code composed of any row elements in the 6th-order DFT transformation matrix can be used as the spreading code , the identification code adopts an orthogonal code with a length of 5.

[0055] The CQI information of the terminal is modulated into 4 QPSK symbols. After the 4 QPSK symbols are processed by DFT, 4 signals are output, and the 4 signals are spread by the spreading code to obtain 24 signals. After the 24 signals are processed by IFFT, the first time-domain sampling signal of an OFDM symbol is obtained. The first time-domain sampling signal is subjected to block expansion of the identification code to obtain a second time-domain sampling signal of 5 OFDM symbols, and the second time-domain sampling signal is processed and sent to the base station. The base station receives the CQI i...

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Abstract

The invention discloses an information transmission method, a system, a user terminal and a base station for realizing the channel quality indication, wherein the information includes the steps: receiving the distributing information of the CQI information of each user terminal; respectively modulating the CQI information of each user terminal into the initial symbol with the length smaller than N, wherein N is the number of used sub-carrier included in each OFDM symbols of the time frequency source; extending the initial symbol corresponding to each user terminal into the signals for transmission with the length N according to the distributing information; transmitting the signals for transmission. The embodiment of the invention differentiates the different terminal through the position, or the extended code and the identification code for transmitting the CQI information, thereby increasing the terminal number that can be held on the CQI source, to support further terminals to transmit the CQI information at the same time.

Description

technical field [0001] The present invention relates to the field of information transmission, in particular to a method and system for transmitting channel quality indication information, a user terminal and a base station. Background technique [0002] figure 1 is a schematic flow chart of CQI information transmission in the prior art, see figure 1 , in an existing uplink channel quality indicator (Channel Quality Indicator, CQI) information transmission technology, the base station allocates an uplink time-frequency resource to the terminal, and the terminal will send its CQI information on the time-frequency resource. In this technology, a subframe is divided into two time slots, and in each time slot, the CQI time-frequency resource consists of 12 consecutive sub Carrier composition. Among the CQI time-frequency resources, resources located on the middle 3 OFDM symbols are used to transmit pilot information, called pilot resources; resources located on the other 4 OF...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 党淑君邓天乐
Owner HUAWEI TECH CO LTD
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