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Cooperative cell selection method participating cooperative transmission, service base station and communication system

A technology for coordinating cells and serving base stations, which is applied in the field of communication, and can solve problems such as inflexibility, inability to consider the time-varying network load of the cell channel, and unspecified problems

Inactive Publication Date: 2010-08-25
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some companies propose that the selection of cooperative cells can adopt static configuration, that is, fixed allocation during network planning. This method is too rigid and cannot take into account the time-varying nature of the channels of each cell and the network load.
Some companies propose to use a dynamic or semi-static method, combining user information and network planning to select a collaborative area for a specific collaborative user, but it has not clearly proposed which indicators to select a collaborative area based on.

Method used

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  • Cooperative cell selection method participating cooperative transmission, service base station and communication system
  • Cooperative cell selection method participating cooperative transmission, service base station and communication system
  • Cooperative cell selection method participating cooperative transmission, service base station and communication system

Examples

Experimental program
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Effect test

no. 1 approach

[0048] The serving base station determines that the terminal needs to provide the coordinated transmission service according to the CQI measurement result fed back by the terminal. The serving base station selects two adjacent cells that are suitable for coordinated transmission for the terminal in the latest adjacent cell measurement report fed back by the terminal, so that the serving cell and the two adjacent cells form a coordinated cell to provide coordinated transmission for the terminal.

[0049] The adjacent cell measurement report contains multiple adjacent cell measurement results (ie RSRP, RSRQ), and the format of the measurement report is:

[0050] Serving cell ID: RSRP and RSRQ from the serving cell to the terminal;

[0051] ID of neighboring cell 1: RSRP and RSRQ from neighboring cell 1 to the terminal;

[0052] ID of neighboring cell 2: RSRP and RSRQ from neighboring cell 2 to the terminal;

[0053] ID of neighboring cell 3: RSRP and RSRQ from neighboring cell...

no. 2 approach

[0070] The serving base station determines that the terminal needs to provide the coordinated transmission service according to the CQI measurement result fed back by the terminal. The serving base station allocates uplink resources to the terminal and sends a reporting instruction. The terminal uses the resources to feed back the latest neighbor cell measurement results to the serving base station. The serving base station selects 2 neighbor cells from the neighbor cell measurement results. The adjacent cells form a coordinated cell to provide coordinated transmission for the terminal.

[0071] As shown in Figure 5, the serving base station starts to select a coordinated cell for the terminal at T2. The serving base station does not directly use the terminal measurement report received at T1 to make the selection, but sends an uplink resource allocation signal to the terminal at T3. command, requiring the terminal to feed back the latest measurement report on the uplink resou...

no. 3 approach

[0082] The serving base station determines that the terminal needs to provide the coordinated transmission service according to the CQI measurement result fed back by the terminal. The serving base station allocates a small amount of uplink resources to the terminal, and the terminal uses the resources to feed back the best 5 neighbor cell IDs in the latest neighbor cell measurement results to the serving base station, and the serving base station selects 2 according to the resource usage and load conditions of the neighbor cells. cells, so that the serving cell and the selected two adjacent cells form a coordinated cell to provide coordinated transmission for the terminal.

[0083] As shown in Figure 6, the serving base station starts to select a coordinated cell for the terminal at T2. The serving base station does not directly use the terminal measurement report received at T1 to make the selection, but sends an uplink resource allocation signal to the terminal at T3. So, t...

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Abstract

The invention provides a selection method of a cooperative cell, a service base station for realizing the same and a communication system. The service base station judges whether needing to provide cooperative transmission for a terminal or not according to a measurement and calculation result of channel quality indication fed back by the terminal; and when the service base station needs to provide the cooperative transmission for the terminal, the service base station selects the cooperative cell participating in the cooperative transmission for the terminal. The selection method of the cooperative cell, the service base station and the communication system can conveniently and effectively solve the problem of judgment and selection of the cooperative cell.

Description

technical field [0001] The present invention relates to the communication field, in particular to a coordinated cell selection method, a serving base station and a communication system for participating in coordinated transmission in coordinated communication. Background technique [0002] With the introduction of LTE-A (Long-Term Evolution Advanced, referred to as LTE-A) requirements, people pay more and more attention to the average spectral efficiency of the cell and the spectral efficiency of the cell edge. In comparison, the spectral efficiency of the cell edge is the most important People are concerned, this is mainly because the uplink and downlink of the LTE-A system is based on OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) or a certain deformation of OFDM as the frequency division system of the basic multiple access method, which is different from the traditional Unlike wireless communication systems that use CDMA (Code-Division Multiple Acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/08H04W36/30H04W88/08
Inventor 张晨晨朱常青段亚军梁枫孙云锋
Owner ZTE CORP
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