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Method and device for resource allocation and channel state information reporting

A channel state information and resource allocation technology, applied in the field of communication, can solve problems such as inability to guarantee feedback accuracy and waste of resources, and achieve the effect of ensuring effective utilization and feedback accuracy

Active Publication Date: 2021-01-22
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, for the codebook defined by the NR system, the dynamic range of its load overhead is relatively large. If the uplink information resources are allocated according to the maximum overhead, it may lead to a large waste of resources.
If the allocated uplink resources are small, the accuracy of the feedback cannot be guaranteed

Method used

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  • Method and device for resource allocation and channel state information reporting
  • Method and device for resource allocation and channel state information reporting
  • Method and device for resource allocation and channel state information reporting

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0136] Assume that the base station is configured with a 32-port Type II codebook, and the codebook parameter L=3, and the number of feedback subbands is 10. The system predefines 3 bits of RI overhead. When the rank (rank)=1-4, there is only one code word (code word), and at this time, the CQI of each sub-band is 4 bits. Assume that when RI=3, the overhead of the PMI is 548 bits; when RI=4, the overhead of the PMI is 726 bits. Assuming that more than one RI value is allowed in the CSR constraint information, the CSI information fed back by the terminal includes two RIs.

[0137] Base station side:

[0138] The protocol stipulates that the first RI set is {1, 2, 3, 4} and remains unchanged.

[0139] The base station determines that the second RI set is {1, 2}. The base station determines to allocate uplink channel resources with RI=2. From Table 1, the PMI load overhead of RI=2 is 370 bits. Considering 3 bits of RI overhead and 40 bits of CQI overhead for 10 sub-bands, t...

Embodiment 2

[0157] The first RI set is {1,2}. The second RI set is {1} when the nth trigger is triggered, the virtual RI value selected by the terminal is 2, and the actual RI is 1. That is, the terminal calculates the CQI and PMI according to RI=1, and the PMI calculated by the terminal only corresponds to the precoding matrix of one data stream. The resources for uplink CSI feedback are allocated according to the largest RI value (1) in the second RI set, so the CQI and PMI calculated by the terminal according to RI=1 can be transmitted in the allocated resources.

[0158] Since the virtual RI value reported by the terminal is 2, it means that the channel from the base station to the terminal can support 2-stream transmission, and the base station can make the second set {1,2} after the n+1th trigger, that is, the terminal can feedback up to two PMI and CQI of the data stream. The base station allocates uplink feedback resources according to the amount of data fed back by the two data...

Embodiment 3

[0160] The first RI set is {1,2}. When the nth trigger is triggered, the second RI set is {1, 2}, the virtual RI value selected by the terminal is 1, and the actual RI is 1. That is, the terminal calculates the CQI and PMI according to RI=1, and the PMI calculated by the terminal only corresponds to the precoding matrix of one data stream. The resources for uplink CSI feedback are allocated according to the largest RI value (2) in the second RI set, and the CQI and PMI calculated by the terminal according to RI=1 can be transmitted in the allocated resources, and there is a certain waste of resources.

[0161] Since the virtual RI value reported by the terminal is 1, it means that the channel from the base station to the terminal can only support 1 stream transmission, and the base station can make the second set {1} after the n+1th trigger, that is, the terminal can only feed back 1 stream at most PMI and CQI of the data stream. The base station allocates uplink feedback re...

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Abstract

Disclosed in the present invention are a method and an apparatus for resource allocation and channel state information reporting, used to ensure effective use of resources and to ensure CSI feedback accuracy. One type of resource allocation provided in the present application comprises: determining a rank indicator set; according to rank indicator values in the rank indicator set, allocating an uplink channel resource to a terminal.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a resource allocation and channel state information reporting method and device. Background technique [0002] The terminal calculates channel state information (Channel State Information, CSI) through downlink channel measurement. The CSI includes channel quality indication (CQI), rank indication (RI) and precoding matrix indication (PMI), and may also include channel state information reference signal (also called sounding reference signal) (Channel State Information Reference Signal, CSI -RS) resource indicates CRI information. In order for the terminal to report the CSI to the base station for base station scheduling, the base station needs to allocate uplink channel resources for the terminal to report the CSI. For a certain codebook configuration of the base station, the CSI load reported by the terminal will change dynamically with different RIs. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0626H04B7/06H04W24/10
Inventor 李辉拉盖施高秋彬陈润华黄秋萍缪德山苏昕王蒙军
Owner DATANG MOBILE COMM EQUIP CO LTD