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Method and device for determining CCE aggregation level

A technology of aggregation level and determination method, applied in the field of communication, can solve the problems of increased control channel load, reduced control channel coverage, unable to meet networking requirements, etc., to achieve a reasonable determination effect

Active Publication Date: 2020-02-04
CHENGDU TD TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For the case of limited control channel capacity, if the aggregation level of CCE is too high, although it will improve the demodulation capability of edge users, it will also increase the control channel load under small bandwidth.
[0008] If the upward adjustment of the CCE aggregation level is restricted, the control channel load can be reduced, but the coverage of the control channel will also be reduced, which cannot meet the networking requirements.

Method used

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  • Method and device for determining CCE aggregation level
  • Method and device for determining CCE aggregation level
  • Method and device for determining CCE aggregation level

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , figure 1 It is a schematic flow diagram of determining a CCE aggregation level in Embodiment 1 of the present application. The specific steps are:

[0033] Step 101, for any user, the base station calculates the received signal-to-noise ratio of the user's control channel.

[0034] When the base station calculates the receiving signal-to-noise ratio of the user's control channel, it can be calculated according to the existing implementation method, such as first calculating the user's pilot receiving signal-to-noise ratio SINR_RS, and then according to the offset between SINR_RS and the control channel SINR The difference is the received signal-to-noise ratio SINR_PDCCH of the control channel.

[0035] The above calculation method may be used in specific implementation, but is not limited to the above calculation method.

[0036] Step 102, the base station periodically collects statistics on the CCE utilization rate of the control channel.

[0037] I...

Embodiment 2

[0052] see figure 2 , figure 2 It is a schematic flow diagram of determining a CCE aggregation level in Embodiment 2 of the present application. The specific steps are:

[0053] Step 201, for any user, the base station calculates the received signal-to-noise ratio of the user's control channel.

[0054] When the base station calculates the receiving signal-to-noise ratio of the user's control channel, it can be calculated according to the existing implementation method, such as first calculating the user's pilot receiving signal-to-noise ratio SINR_RS, and then according to the offset between SINR_RS and the control channel SINR The difference is the received signal-to-noise ratio SINR_PDCCH of the control channel.

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Abstract

The invention provides a method and a device for determining a CCE aggregation level. The method comprises the steps: calculating the received signal-to-noise ratio of a control channel of a user forany user; periodically counting the CCE utilization rate of the control channel; and when the counted CCE utilization rate is smaller than a first threshold value, determining a CCE aggregation levelcorresponding to the user according to the DCI format corresponding to the current TTI and the calculated received signal-to-noise ratio of the control channel. According to the method, the CCE aggregation level can be flexibly and reasonably determined on the basis of the channel quality and the control channel load.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for determining a CCE aggregation level. Background technique [0002] In an existing communication system, a physical downlink control channel (Physical Downlink Control Channel, PDCCH) channel is used to carry uplink and downlink control information, and the channel is used to implement user scheduling. In order to configure time-frequency resources of PDCCH and other downlink control channels more effectively, LTE defines two dedicated control channel resource units: RE Group (REGroup, REG) and Control Channel Element (Control Channel Element, CCE). [0003] Wherein, a CCE is composed of 9 REGs. When performing PDCCH resource allocation, according to different resource requirements, N CCEs can be allocated as a unit, where N represents the aggregation level of the CCEs. In the current communication system, the aggregation levels of CCE are ...

Claims

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Application Information

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IPC IPC(8): H04B17/336H04B17/309H04B17/382
CPCH04B17/336H04B17/309H04B17/382
Inventor 王梦茹黄伟鲜柯
Owner CHENGDU TD TECH LTD