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A method and system for triggering coordinated multi-point transmission based on retransmission

A technology of multi-point coordination and retransmission ratio, which is applied in the transmission system, digital transmission system, radio transmission system, etc., can solve the problems of increasing the burden of the X2 port and decreasing resource utilization, and achieve the effect of reducing overhead and increasing capacity

Inactive Publication Date: 2015-09-16
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because CoMP users occupy the resources of multiple cells, the implementation of the traditional CoMP solution will lead to a decrease in resource utilization and increase the burden on the X2 interface.

Method used

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  • A method and system for triggering coordinated multi-point transmission based on retransmission
  • A method and system for triggering coordinated multi-point transmission based on retransmission
  • A method and system for triggering coordinated multi-point transmission based on retransmission

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Embodiment Construction

[0046] The basic idea of ​​the present invention is as follows: for a CoMP type UE, according to whether the retransmission ratio calculated during service transmission exceeds a predetermined trigger threshold, it is determined whether the service transmission of the UE is transmitted in CoMP mode.

[0047]Specifically, for a UE in the long-CoMP deactivated state, when the UE is transmitting services, the eNodeB does not use the CoMP method when scheduling the first new transmission of the packet (that is, the CoMP JT strategy is used for the downlink, and multiple eNodeBs are used for the uplink. receiving strategy), but use a single cell (preferably the primary cell) to transmit services for the UE; according to the UE's ACK / NACK (Acknowledgment / Negative Acknowledgment, correct / wrong response message) feedback information or the serving cell detection CRC (Cyclic Redundancy Check , cyclic redundancy check) result, decide whether to use CoMP transmission for retransmission or...

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Abstract

Disclosed are a method and system for triggering coordinated multi-point (CoMP) transmission, wherein whether the service transmission of UE is transmitted in the manner of CoMP is determined according to whether the statistical retransmission ratio is greater than a pre-determined trigger threshold when carrying out the service transmission of the CoMP type UE. By way of the present invention, the system can activate or deactivate the CoMP transmission self-adaptively according to the actual conditions of the wireless channel, reducing the overhead due to the use of unnecessary CoMP transmission, and increasing the network capacity.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, to a method and system for triggering coordinated multi-point transmission based on retransmission. Background technique [0002] The traditional CoMP (Coordinated Multi-Point, coordinated multi-point) activation scheme is that when the UE (User Equipment, user equipment) moves to the edge of the cell and the downlink signal strength value measured by the UE meets a certain threshold, the serving cell (hereinafter referred to as Called the primary cell) configures the UE as a CoMP type UE. After that, the service of the UE will be transmitted using the CoMP scheme, and the serving cell and the coordinated cell will perform data transmission through the X2 interface. [0003] A joint transmission (JT for short) scheme is an effective implementation scheme. In this scheme, multiple transmission points serve one user at the same time, aiming at improving ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/16H04L1/18
CPCH04B7/0689H04L1/1825H04B7/024
Inventor 靳日飞赵瑜贺胜樊荣
Owner ZTE CORP