Method, system and device for realizing handoff in micro-micro cellular communication system

A communication system and pico-cell technology, which is applied in the field of handover of pico-cellular communication systems, can solve the problems of inaccurate target cells and the failure of pico-cell handover to achieve rich services, improved user experience, and good network coverage. Effect

Inactive Publication Date: 2010-07-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation will lead to inaccurate target cell for handover, so that pico handover cannot be performed normally

Method used

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  • Method, system and device for realizing handoff in micro-micro cellular communication system
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  • Method, system and device for realizing handoff in micro-micro cellular communication system

Examples

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example 1

[0075] The target cell is a logical cell under another BSC. At this time, the handover process of the external handover is the same as that of the common picocellular system, but the handover process is special. Here we describe the handover process different from the common external handover steps, see Figure 4 .

[0076] Figure 4 The nouns are explained as follows:

[0077] macroBTS: macro base station, the general coverage is more than 1000 meters;

[0078] picoBTS: pico base station, the general coverage is within 100 meters;

[0079] BSC-macro: This article refers to the BSC to which the macro base station belongs;

[0080] BSC-pico: This article refers to the BSC to which the pico base station belongs;

[0081] MSC: Mobile Switching Center.

[0082] Figure 4 In step 3, BSC_pico receives the "handover request" message sent by MSC, which contains not a real CGI-A of the pico base station, but a CGI-F of a logical cell.

[0083] After receiving this message, BSC_...

example 2

[0092] The target cell is the logical cell under the current BSC. The steps different from the ordinary internal handover process are described here. For details, see Figure 5 .

[0093] Figure 5 The nouns are explained as follows:

[0094] Destination picoBTS: the picoBTS that will reside after the mobile phone is switched;

[0095] Source picoBTS: the picoBTS where the mobile phone resides before switching;

[0096] Figure 5 In the third step, the BSC does not need to allocate a service channel before sending the "handover command" message to the source picoBTS, which contains the description information of the public handover channel. The BSC commands the source picoBTS to switch the mobile phone to the public switching channel first.

[0097] In step 4, after receiving the "handover detection" message sent by the mobile phone forwarded by the destination picoBTS, the BSC records the identifier CGI-A of the pico base station actually accessed by the mobile phone.

...

Embodiment 3

[0104] A system for realizing handover of a picocellular communication system, including: a source base station for switching out, a target base station for switching in, and a BSC, wherein:

[0105] The source base station is used to forward the measurement report reported by the mobile phone in the call to the BSC; when receiving the handover command from the BSC, release the public handover channel, and release the traffic channel resources when receiving the release command from the BSC.

[0106] The above measurement report mainly includes the signal strength of each neighboring cell, the frequency point of the neighboring cell, and the color code of the base station of the neighboring cell, so that the BSC can use it when making a handover decision.

[0107] BSC is used to perform parameter configuration and neighbor cell information configuration for each base station, include the corresponding information of the logical cell in the configuration, and store the configure...

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Abstract

The invention discloses a method, a system and a device for realizing handoff in a micro-micro cellular communication system. The method comprises the following steps: configuring parameters and neighboring cell information on each base station in a base station controller BSC, wherein the neighboring cell information includes corresponding information of a logic cell to which a base station belongs; if a target cell selected by a BSC handoff decision is a micro-micro base station of the BSC and the frequency point and the color code of the micro-micro base station are matched with those of other neighboring cells, changing the target cell into the logic cell to which the base station belongs by the BSC; and when the BSC executing cut-in is informed of the fact that the target cell to be cut into is the logic cell in the cut-in process, instructing a mobile phone to hand off to a common handoff channel of the logic cell, and after an actually accessed micro-micro base station is known, performing the subsequent cut-in operation. The method, the system and the device can support macro-micro handoff, micro-micro handoff and micro-macro handoff simultaneously.

Description

technical field [0001] The invention relates to the switching technology of the mobile communication system, in particular to a method for realizing the handover of the picocellular communication system. Background technique [0002] With the development of the Global System for Mobile Communications GSM network and the subdivision of market applications, GSM pico base stations with a coverage radius of less than 100 meters are more and more widely used, including blind spot coverage of Public Land Mobile Networks (PLMN, Public Land Mobile Network), Enterprise internal coverage and family coverage, etc. [0003] For mobile communication systems, handover between different base stations during a call is a basic function. The same is true for pico base station systems. For example, when a user enters from the coverage area of ​​a macro base station to the coverage area of ​​a public network supplementary pico base station, the coverage area of ​​an enterprise internal pico b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W36/30H04W76/06H04W84/10
Inventor 彭江萍王丽涛唐雪
Owner ZTE CORP
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