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Method and device used for collaborative switching of plurality of mobile relays

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

Active Publication Date: 2013-08-14
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • 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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  • Method and device used for collaborative switching of plurality of mobile relays
  • Method and device used for collaborative switching of plurality of mobile relays
  • Method and device used for collaborative switching of plurality of 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] The relay classification of L1 / L2 / L3 is discussed in 3GPP TR36.806 (Release 9). For mobile trunking, L3 trunking is considered the most suitable trunking to support group mobility. Therefore, the mobile relay of the present invention also supports L3 relay. All control plane and user plane protocols are terminated at the mobile relay via the Un interface between the user equipment and the mobile relay.

[0034] A typical high-speed train is about 400m long. In order to cover the whole train, more than one mobile relay is installed on the train, for example, one mobile relay may be installed in each carriage to serve the user equipments in the carriage.

[0035]Usually the speed of high-speed train is 350km / h. The backhaul link between a mobile relay and its base station is unstable especially when moving at a very high speed, or when the train is p...

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Abstract

The invention aims to provide a method and a device used for collaborative switching of a plurality of mobile relays. According to the invention, when a source base station determines that one of the mobile relays is required to switch, the switch triggering time of at least one of the mobile relays determined to be switched currently, which is saved in the rear mobile relays, is determined by the source base station according to the distances among the mobile relays and the motion related information of an movable object, and the mobile relays are started up according to the sequence in the rear mobile relays and first timers corresponding to the rear mobile relays are actuated; and when all periods of the first timers come to an end, the switch configuring information in the rear mobile relays is obtained from target base stations corresponding to the mobile relays determined to be switched currently through the source base station and is used for corresponding RRC (Radio Resource Control) reconfiguration in rear mobile relays and realizing communication with the target base station. According to the invention, the amount and switch time delay of switching signaling are both reduced through collaborative switching of the plurality of mobile relays, so that switching failure is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of mobile communication, 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 the train, for example, the high-speed train (CRH) between Beijing and Shanghai traveling at a speed of 350km / h, an access network with high bandwidth and high mobility elasticity 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 EMU 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. ...

Claims

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Application Information

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IPC IPC(8): H04W36/26H04W36/32
CPCH04W36/0005H04W84/047H04W36/00837H04W36/0058
Inventor 潘宇文罗庆霖杨涛
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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