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A cell switching method and system in radio communication system

A technology of wireless communication system and cell handover, applied in the direction of wireless communication, electrical components, etc., can solve the problem that the cell cannot be handed over, and achieve the effect of solving the problem that the cell cannot be handed over

Active Publication Date: 2010-06-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In view of this, an embodiment of the present invention proposes a cell handover method of a wireless communication system on the one hand, so as to solve the problem that the cell cannot be handed over caused by the limitation of the number of neighboring cells.
[0013] Another aspect of the embodiment of the present invention proposes a cell handover system of a wireless communication system to solve the problem that the cell cannot be handed over caused by the limitation of the number and capability of neighboring cells

Method used

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  • A cell switching method and system in radio communication system
  • A cell switching method and system in radio communication system
  • A cell switching method and system in radio communication system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] The first embodiment: apply the present invention to the 3GPP / UMTS scheme.

[0044] According to the above, in the current UMTS, the cell identity flag is only delivered in system messages 3 and 4. Instead, the System Frame Number (SFN) is broadcast on the Broadcast Channel (BCH). During neighboring cell measurement, when the terminal needs to obtain the time difference between the serving cell and the target cell, it can read the SFN information in the neighboring cell BCH.

[0045] At present, the channel coding method of BCH is as follows image 3 shown. From image 3 It can be seen from the figure that the TTI of the BCH transmission channel is 20ms, and two PCCPCH physical frames need to be occupied. The message body of the corresponding transport channel BCH20ms TTI bearer system is shown in Table 1 (partially shown).

[0046] cell type

Type and

reference

Message type / message type

SFNprime / system frame number

0...

no. 2 example

[0067] The second embodiment: apply the present invention to the 3GPP / LTE solution.

[0068] In the 3GPP / LTE solution, both the synchronization channel SCH and the broadcast channel BCH can broadcast cell-related messages. Due to the special status of the SCH channel, that is, the terminal needs to synchronize and analyze the SCH channel before analyzing the BCH channel of the cell, so it is a more preferable method to put the cell identity mark in the SCH channel.

[0069] When the SCH channel adopts the hierarchical synchronization channel Hierarchical SCH scheme, the cell identity mark can be placed on the second synchronization channel secondary SCH.

[0070] Table 5 is a schematic diagram of the cell identity flag carried in the LTE secondary SCH according to an embodiment of the present invention.

[0071] cell type

Type and

reference

New Cell identity / New Cell

identity

16 bits / M

bits

Cell id / cell scrambling code

...

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Abstract

In the method, each subzone broadcasts ID sign of self-subzone. The method also includes following steps: sending neighboring area scrambling code (NASC) of current subzone and command for parsing IDsign of subzone of neighboring areas to terminal, and NASC needed to parse ID sign of subzone is indicated in the said command; the terminal measures signal quality of NASC of current subzone, and parses out at least one ID sign of subzone selectively from NASC needed to parse; based on result of measuring signal and parsed ID sign of subzone to switch to target subzone from current subzone. The invention also discloses the subzone switch system of wireless communication system. The invention can solve issue that subzone is unable to be switched caused by quantitative capability limitation ofneighboring area.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, the present invention relates to a cell handover method and system of a wireless communication system. Background technique [0002] With the development of mobile communication, three-dimensional coverage is required to meet the increasing demand for coverage and capacity. Generally, the macro cell (Macro Cell) is used to solve large-area coverage, and the small cell (Micro Cell) is used to meet the needs of deep coverage and hotspot high-speed data services. In the third generation partnership project (3GPP) and subsequent evolution of 3GPP2, mobile broadband is one of its most important target services. [0003] In order to realize the popularization of mobile broadband based on the 3GPP / 3GPP2 system, the base station form and deployment method must meet the needs of users in terms of performance and cost. Drawing lessons from the successful expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/26
CPCH04W36/26
Inventor 赵其勇汪洪源马洁
Owner HUAWEI TECH CO LTD