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Management method and apparatus of period parameters of channel quality indication (CQI) feedback

A technology of channel quality indication and period parameters, which is applied in the direction of digital transmission system, transmission control/equalization, error prevention/detection using the return channel, etc. It can solve the problem of occupying a large number of bits and achieve the effect of reducing the number of bits

Active Publication Date: 2010-03-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] Embodiments of the present invention provide a management method and device for the periodic parameter of CQI feedback, so as to solve the problem that the periodic parameter of CQI feedback set by the base station for the user terminal needs to occupy a relatively large number of bits

Method used

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  • Management method and apparatus of period parameters of channel quality indication (CQI) feedback
  • Management method and apparatus of period parameters of channel quality indication (CQI) feedback
  • Management method and apparatus of period parameters of channel quality indication (CQI) feedback

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Taking the periodic parameter setting of CQI feedback on the 3GPP LTE system PUCCH as an example, the processing flow of the management method for the periodic parameter of channel quality indication feedback provided by this embodiment is as follows: image 3 As shown, the following processing steps are included:

[0054] Step 31. Determine the CQI feedback mode of the user terminal and the value of each cycle parameter.

[0055] The base station first determines the CQI feedback mode of the user terminal, that is, the wideband CQI feedback mode or the frequency-selective CQI feedback mode, and then determines the values ​​of corresponding cycle parameters according to the feedback mode. If the user terminal is in wideband CQI feedback mode, determine the corresponding N p 1. N OFFSET 1. M RI and the values ​​of the four parameters of O; if the user terminal is a frequency-selective CQI feedback mode, then determine the corresponding N p 2. N OFFSET 2, K, M RI an...

Embodiment 2

[0078] Taking the periodic parameter setting of CQI feedback on the PUCCH of the 3GPP LTE system as an example, in the setting scheme of the CQI feedback type indication field, the CQI information periodic parameter field and the RI information periodic parameter field provided by this embodiment, the parameter N p 1 and N OFFSET 1. N p 2 and N OFFSET 2 for joint encoding, and for the parameter M RI The value of and O is also different from the above-mentioned embodiment 1.

[0079] The setting schemes of the CQI feedback type indication field, the CQI information period parameter field and the RI information period parameter field provided in this embodiment are shown in Table 4 below:

[0080] Table 4:

[0081] parameter field

number of bits

default value

illustrate

CQI reverse

Feed type indication

1

Wideband CQI Inverse

feed mode

Used to indicate the CQI feedback class

Type: wideband CQI feedback mo...

Embodiment 3

[0098] Since there are at most 6 uplink subframes within 10ms in the ratio of uplink and downlink subframes supported by the LTE TDD system, the parameter N OFFSET 1. N OFFSET The possible values ​​of 2 and 0 are reduced, which can further reduce the number of signaling bits.

[0099] Taking the periodic parameter setting of CQI feedback on the PUCCH of the 3GPP TDD system as an example, the setting schemes of the CQI feedback type indication field, the CQI information periodic parameter field and the RI information periodic parameter field provided by this embodiment are shown in Table 5 below:

[0100] table 5:

[0101] parameter field

number of bits

default value

illustrate

CQI feedback

type indication

1

Wideband CQI

feedback mode

Used to indicate the CQI feedback type:

Wideband CQI feedback mode, frequency selective CQI

feedback mode

CQI information

Period parameter field

8 ...

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Abstract

The embodiment of the invention provides a management method and apparatus of period parameters of channel quality indication (CQI) feedback. The method mainly includes: setting up period parameter of CQI feedback of subscriber terminals, wherein, the total bit number occupied by feedback period N[p]1 of broadband CQI information in broadband CQI feedback mode and time offset N[OFFSET]1 of CQI information feedback time in a period is provided to be identical to the total bit number occupied by feedback period N[p]2, N[OFFSET]2 of adjacent twice CQI information in the frequency selected CQI information; transmitting the period parameters of CQI feedback to the subscriber terminal. By utilization of the invention, appearance of independent K field is avoided, the bit number occupied by period parameters can be reduced, and the resources required by the system to transmit period parameters are saved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for managing period parameters of channel quality indication feedback. Background technique [0002] In the uplink direction of the wireless communication system, the user equipment needs to feed back Channel Quality Indication (CQI, Channel Quality Indication) information to the base station. The base station can know the downlink channel quality perceived by the user equipment through the CQI information fed back by the user equipment, so as to help the base station perform frequency selective scheduling and perform adaptive adjustment of the downlink. [0003] In the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) Long Term Evolution (LTE, Long Term Evolution) system, the downlink direction adopts Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) technology and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04L1/16H04B7/005
Inventor 陈小波
Owner HUAWEI TECH CO LTD
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