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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: 2014-12-10
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 the 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 used as candidate cells of the target primary cell. Furthermore, since the cells 6 and 7 belong to the same eNodeB as the source primary cell 1, one of the cells 6 and 7 with a smaller load is selected as the target primary cell.

Embodiment 2

[0094] Embodiment 2: Selection of the 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 include: cell 4, cell 13, and cell 14, and these three cells belong to other cells. Since only cell 4 and the 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 method of directly selecting the target side cell set during handover

[0097] as attached Figure 5 As shown, 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 not limited to the following information: UE service bearer information, handover type, handover reason, UE security information, UE wireless Access capability information, access stratum configuration and radio resource configuration, source cooperating 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 that is about 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 measuremen...

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Abstract

Provided is a handover method based on coordinated multi-point. The method includes: a target main cell is determined after a source main cell receives a measurement report reported by a terminal, and a handover request message is sent to the target main cell; resources are allocated to the terminal after the target main cell receives the handover request message, and a target coordinated cell set and a target handover cell set are determined before or after the terminal switches to the target main cell. A handover system based on coordinated multi-point is also provided. The present invention can reduce the time delay due to handover interruption, increase system throughput during handover, and reselect a CoMP cell set and a handover cell set for the UE during or after handover, thus enabling the UE to obtain the same service after handover.

Description

technical field [0001] The present invention relates to an LTE_A (Long Term Evolution Advanced, advanced long-term evolution) system, in particular to a handover method and system in a CoMP (Cooperative Multi-Point, coordinated multi-point) transmission system. Background technique [0002] In the handover scenario of the existing mobile communication system, the handover process is usually triggered by the user and decided by the base station. For the LTE system, when 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, Reference Signal Received Power) or RSRQ (Reference Signal Receiving Quality, reference signal reception quality), when the UE measures and finds that the RSRP or RSRQ of the currently connected base station drops below a certain threshold, and / or the RSRP of a certain cell in the neighboring cell Or after the RSRQ rises above a cer...

Claims

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Application Information

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