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Method and apparatus for determining aggregation grade of physical downlink control channel

A technology of physical downlink control and aggregation level, applied in the field of LTE, can solve problems such as limited resources, reduced number of user access, poor channel quality, etc., and achieve the effect of increasing the number of users

Inactive Publication Date: 2017-02-22
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing system, in order to ensure the stability of the system, the CCE aggregation level for the cell center users is generally 4, and the CCE aggregation level for the cell edge users is 8. Although this method is simple, due to the limited resources in the PDCCH, Therefore, this will lead to a reduction in the number of user access in the cell
[0008] On the other hand, if each user is assigned a CCE with a low aggregation level, users with poor channel quality will not be able to demodulate correctly

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  • Method and apparatus for determining aggregation grade of physical downlink control channel
  • Method and apparatus for determining aggregation grade of physical downlink control channel
  • Method and apparatus for determining aggregation grade of physical downlink control channel

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Embodiment Construction

[0053] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0054] One of the core ideas of the embodiments of the present invention is to comprehensively consider the geographical location of the user's actual cell, channel conditions, and service requirements, and realize dynamic configuration of the user's CCE aggregation level. The signal-to-noise ratio of the user is used to determine the CCE aggregation level of the control channel unit corresponding to the user; for the cell edge user, the CCE aggregation level corresponding to the user is determined according to the service priority of the user, so as to ensure that the control channel of each user can be correctly demodulated Under the premise, increase the number of users in the cell as much as possible.

[0055] refer to figur...

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Abstract

The embodiment of the invention provides a method and apparatus for determining the aggregation grade of a physical downlink control channel. The method comprises the following steps: determining whether a current user is a cell center user or a cell edge user; if the current user is a cell center user, determining the aggregation grade of a control channel element (CCE) corresponding to the user according to the signal-to-noise ratio of the channel where the user is located; and if the current user is a cell edge user, determining the CCE aggregation grade corresponding to the user according to the service priority of the user. The method and apparatus can increase the number of users getting access to the cell as much as possible while ensuring that each user control channel can be correctly demodulated.

Description

technical field [0001] The present invention relates to the technical field of LTE, in particular to a method for determining an aggregation level of a physical downlink control channel and a device for determining an aggregation level of a physical downlink control channel. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, the PDCCH (Physical Downlink Control Channel, physical downlink control channel) is used to carry the user's DCI (Downlink Control Information, downlink control information), and the basic unit of DCI information for each user is CCE (Control Channel Element, Control Channel Element), the performance of PDCCH can be measured by the size of CCE aggregation level, and the CCE aggregation level refers to how many CCEs need to be used to carry DCI. [0003] The existing standard stipulates that there are four aggregation levels of CCEs: 1, 2, 4, and 8. The higher the aggregation level, the more CCEs are needed. The de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02
CPCH04W24/02
Inventor 罗伟黄安鹏谢麟振
Owner PEKING UNIV