HANDOVER WITH MOBILE RELAYS

• US 20170105160A1
• Filed: 12/21/2016
• Published: 04/13/2017
• Est. Priority Date: 09/10/2012
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: LI, Zhaojun, VADGAMA, Sunil Keshavji
• Granted Patent: US 9,794,851 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 36/0016 Hand-off preparation specially adapted for end-to-end data sessions
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0094 Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

Providing mobility support of UEs that are served by mobile relay base stations, by providing handover of a UE for data traffic only between two mobile relay base stations. Exchanging information between the source and target mobile relay stations of the concerned UE in handover, and/or the corresponding donor base stations if applicable. The handover is triggered by any of the following: based on UE'"'"'s measurement report, the signal quality of a neighbour cell is better than the current serving cell; based on the measurement of the serving mobile relay base station, the signal quality of the link to the UE is worse than a certain threshold; or based on the measurement of the serving mobile relay base station, the signal quality of a neighbour cell is much better than the current donor base station.

Claims

1. A terminal equipment in a communication system including at least one base station and a plurality of further stations, the terminal equipment comprising:

a transmitter; and

a processor electrically coupled with the transmitter, the processor configured for;

causing an exchanging of data traffic and signaling by employing wireless links with the at least one base station and one or more further stations of the plurality of further stations, the wireless links including a first wireless link between the terminal equipment and a base station;

employing the first wireless link for control signaling between the terminal equipment and the base station;

determining when a handover is triggered for a handover of the terminal equipment from a first further station to a second further station, the first further station and the second further station from among the plurality of further stations;

performing a handover for data traffic only of the terminal equipment from the first further station to the second further station while maintaining the first wireless link with the base station for the control signaling.