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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

An objective of the present invention aims at providing a method and apparatus for cooperative handover across multiple mobile relays. Herein, when a source DeNB makes a handover decision for one of the multiple mobile relays, the source DeNB determines a handover triggering time of at least one of the mobile relays following the current handover mobile relay based on distance between the multiple mobile relays and information relevant to motion of the moving object, and initiates and executes a first timer corresponding to the following mobile relay according to the sequence of the following mobile relay; upon expiration of each first timer, the source DeNB obtains handover configuration information of a corresponding following mobile relay from a target DeNB corresponding to the current handover mobile relay, so as to be available for the corresponding following mobile relay to perform RRC reconfiguration and communicate with the target DeNB Through cooperative handover across multiple mobile relays, the amount of handover signaling and handover latency will be both reduced, thereby effectively avoiding handover failure and improving user experience.

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
CPCH04W84/047H04W36/0058H04W36/00837
Inventor 潘宇文罗庆霖杨涛
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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