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A Cooperative Handover Method and Device for Multiple Mobile Relays

A mobile relay and movement technology, applied in electrical components, wireless communication, network topology, etc., can solve problems such as high handover failure rate and large system delay, so as to improve service quality, avoid handover failure, and reduce handover delay Effect

Active Publication Date: 2016-01-13
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that high mobility leads to large system delays and high handover failure rates

Method used

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  • A Cooperative Handover Method and Device for Multiple Mobile Relays
  • A Cooperative Handover Method and Device for Multiple Mobile Relays
  • A Cooperative Handover Method and Device for Multiple Mobile Relays

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] L1 / L2 / L3 relay classification is discussed in 3GPPTR36.806 (Release9). For mobile relays, L3 relays are considered the most suitable relays to support group mobility. Therefore, the mobile relay of the present invention also supports L3 relay. Via the Un interface between the user equipment and the mobile relay, all control plane and user plane protocols are terminated in the mobile relay.

[0034] A typical high-speed train is about 400m long. In order to cover the entire train, more than one mobile relay is installed on the train. For example, one mobile relay can be installed in each car to serve the user equipment in the car.

[0035] Usually the speed of high-speed trains is 350km / h. Especially when moving at an extremely high speed, or when the train is passing through a tunnel with no direct path signal between a base station and a mobile relay, th...

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Abstract

The object of the present invention is to provide a cooperative handover method and device for multiple mobile relays. Wherein, when the source base station makes a handover decision for one of the plurality of mobile relays, the source base station determines the current handover based on the distance between the plurality of mobile relays and the movement-related information of the moving object. The switching trigger time of at least one subsequent mobile relay of the mobile relay, and start and execute the first timer corresponding to the subsequent mobile relay according to the sequence of the subsequent mobile relay; when the first timer When each of the timers expires, the source base station obtains the handover configuration information of the corresponding subsequent mobile relay from the target base station corresponding to the currently switched mobile relay for use by the corresponding subsequent mobile relay. RRC reconfigures and communicates with the target base station. Through cooperative handover of multiple mobile relays, the present invention reduces the amount of handover signaling and handover delay, thereby effectively avoiding handover failure.

Description

Technical field [0001] The present invention relates to the field of mobile communication technology, and in particular to a cooperative handover technology for multiple mobile relays. Background technique [0002] In recent years, wireless broadband has become a reality. Online multimedia, games and mobile application downloads are occupying the main traffic of mobile networks. In order to provide data-intensive applications to passengers on trains, for example, high-speed trains (CRH) travelling between Beijing and Shanghai at 350km / h, a high-bandwidth and highly flexible access network is required. The use of mobile relays installed inside high-speed trains is considered a viable technology to provide users with a variety of high-quality services. Since the train length of the high-speed train is about 400m, in order to cover the entire train, it is necessary to install multiple mobile relays on the train to maintain the smooth transmission of the backhaul link. [0003] Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/26H04W36/32
CPCH04W84/047H04W36/00837H04W36/0058
Inventor 潘宇文罗庆霖杨涛
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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