Method for controlling inter-frequency and inter-system handover measurement by RNC

A technology to control frequency and controller, applied in communication between multiple stations, time-division multiplexing system, electrical components, etc., can solve problems such as measurement failure and failure to capture the target cell

Inactive Publication Date: 2009-05-13
BEIJING SAMSUNG TELECOM R&D CENT +1
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AI Technical Summary

Problems solved by technology

Since the position of the synchronization channel (SCH) of the 3.84Mcps TDD cell is uncertain, when the uplink or downlink traffic channel of the UE overlaps with the SCH or P-CCPCH of the target inter-frequency cell, it will always be captured in the window of the idle time slot The SCH or P-CCPCH of the target cell is not available, causing measurement failure

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  • Method for controlling inter-frequency and inter-system handover measurement by RNC
  • Method for controlling inter-frequency and inter-system handover measurement by RNC
  • Method for controlling inter-frequency and inter-system handover measurement by RNC

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Embodiment Construction

[0028] For the possible synchronization failure problem in the inter-frequency / inter-system measurement process, it can be solved by reallocating the traffic channel of the UE, that is, moving the traffic channel of the UE to other time slots, so that the position of the measurement window can be changed. This increases the probability of synchronization. Channel reconfiguration can be done through existing RRC and NBAP signaling in existing specifications.

[0029] Even so, there are still two issues to consider in the implementation: First, is it necessary to perform channel reassignment every time a measurement fails? After all, the reconfiguration of radio resources will bring greater complexity to the management of radio resources. Second, if channel reallocation is required, to which time slot does the channel need to be reallocated? Because neither the UE nor the RNC knows which service time slot overlaps with the synchronization channel of the target cell.

[0030]A...

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Abstract

The invention relates to a method for switching measurement between an RNC control frequency and a system, comprising the following steps: an RNC decides whether to redistribute a traffic channel of a UE according to received measurement report from the UE; and if the RNC decides to redistribute the traffic channel of the UE, the RNC decides which time slot to redistribute the traffic channel of the UE. The method synthetically considers according to signal strength condition of a peripheral cell and a cell reflected in measurement report of the UE, and decides whether to more the channel. If the signal of the UE is strong in the cell or weakens in the cell, but the periphery has other cells with stronger signals, the method can ignore and bear measurement failure during measurement of a target cell; and if the signal of the UE is weak in the cell, and the periphery has no any synchronous cell, or has a synchronous cell, but is not suitable for switching, and the method needs to move the channel of the UE. Therefore, the method can avoid measurement failure, so as to reduce cutting off rate.

Description

technical field [0001] The present invention relates to inter-frequency / inter-system switching from the third-generation mobile communication system 1.28Mcps TDD (time division duplex) system to the inter-frequency 1.28Mcps TDD / inter-frequency 3.84Mcps TDD system / the second-generation GSM (Global System for Mobile) system previous measurement process. Background technique [0002] The 3GPP (Third Generation Partnership Project) RAN (Radio Access Network) specification stipulates that the 1.28Mcps TDD system supports the function of inter-frequency / inter-system handover. Due to the coexistence of multiple access technologies in existing and future mobile communication systems, for example: the third generation mobile communication system - broadband CDMA system (including FDD of WCDMA system, 1.28Mcps TDD, 3.84Mcps TDD mode, and cdma2000 system) And the second generation mobile communication system GSM. As for the 1.28Mcps TDD system, there are many possibilities of carrier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W72/04H04J3/16H04W24/08H04B7/26H04W24/10H04W36/14H04W36/30H04W56/00
Inventor 王婷李小强李国锡崔成豪李国镇
Owner BEIJING SAMSUNG TELECOM R&D CENT
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