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Switching method and switching system based on multipoint coordination

A technology for multi-point coordination and cell handover, which is applied in the field of LTE_A system and can solve problems such as a complete handover method when the target cell does not belong to the set

Inactive Publication Date: 2012-07-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no complete handover method when the UE's target cell does not belong to the original CoMP coordinated cell set

Method used

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  • Switching method and switching system based on multipoint coordination
  • Switching method and switching system based on multipoint coordination
  • Switching method and switching system based on multipoint coordination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Embodiment 1: Selection of target primary cell

[0093] as attached image 3 As shown, the source primary cell receives the measurement report sent by the UE, and the cells carried in the report include: cell 5, cell 6, cell 7, and cell 16. Since cells 5, 6, and 7 belong to the source handover cell set, they are preferentially selected as candidate cells of the target primary cell. Also, since the cells 6 and 7 and the source primary cell 1 belong to the same eNodeB, one of the cells 6 and 7 with a smaller load will be selected as the target primary cell.

Embodiment 2

[0094] Embodiment 2: Selection of target primary cell

[0095] as attached Figure 4 As shown, the source primary cell receives the measurement report sent by the UE, and the cells carried in the report are: cell 4, cell 13, and cell 14, and these three cells all belong to other cells. Since only cell 4 and source primary cell 1 belong to the same eNodeB, it is preferentially selected as the target primary cell.

Embodiment 3

[0096] Embodiment 3: The handover mode of directly selecting the target side cell set during handover

[0097] as attached Figure 5 As shown in the figure, after the source primary cell selects the target primary cell, it sends a handover request message to the target primary cell. The message includes but is not limited to the following information: UE's service bearer information, handover type, handover reason, UE's security information, UE's wireless Access capability information, access stratum configuration and radio resource configuration, source cooperative cell set information, source handover cell set information, and other cell information in the measurement report.

[0098] After receiving the handover request message, the target primary cell allocates resources for the UE to be handed over, and comprehensively considers these cells according to the source cooperative cell set information, source handover cell set information and other cell information in the meas...

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Abstract

The invention provides a switching method based on multipoint coordination. The switching method comprises the following steps that: after receiving a measurement report reported by a terminal, a source main cell determines a destination main cell, and transmits a switching request message to the destination main cell; after receiving the switching request message, the destination main cell configures resource for the terminal, before or after the terminal switches to the destination main cell, destination cell determines a destination coordination cell set and a destination switching cell set. The invention further provides a switching system based on multipoint coordination. The switching method and the switching system can reduce switching interrupt delay, improve the system throughput while switching, and select a CoMP cell set and a switching cell set again for the UE (user equipment) during or after switching, thus, the UE can get the same server after switching.

Description

technical field [0001] The present invention relates to an LTE_A (Long Term Evolution Advanced, Advanced Long Term Evolution) system, and specifically relates to a handover method and system in a CoMP (Cooperative Multi-Point, Cooperative Multi-Point) transmission system. Background technique [0002] In the handover scenario of the existing mobile communication system, the handover process is usually completed by user triggering and base station decision. For the LTE system, when the UE (User Equipment, user equipment) communicates with the current serving cell, one of the main application methods is: the UE measures the RSRP (Reference Signal Receiving Power) of the current serving cell and the adjacent cells of the serving cell. Reference Signal Receiving Power) or RSRQ (Reference Signal Receiving Quality), when the UE measures and finds that the RSRP or RSRQ of the currently connected base station falls below a certain threshold, and / or the RSRP of a cell in the adjacent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/04H04W36/30
CPCH04W36/0055H04W36/0058H04W36/00692
Inventor 樊荣
Owner ZTE CORP
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