Handover with mobile relays
First Claim
1. A subscriber station in a wireless communication system including at least one base station and a plurality of further stations, the subscriber station 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 subscriber station and a base station;
employing the first wireless link for control signaling between the subscriber station and the base station;
determining when a handover is triggered for a handover of the subscriber station 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 subscriber station from the first further station to the second further station while maintaining the first wireless link with the base station for the control signaling.
1 Assignment
0 Petitions
Accused Products
Abstract
A method to provide mobility support of UEs (12) that are served by mobile relay base stations (14), by providing handover of a UE(12) for data traffic only between two mobile relay base stations. This is achieved by information exchanging between the source and target mobile relay stations of the concerned UE in handover, and/or the corresponding donor base stations (13, 11) if applicable. The handover is triggered by any of the following: based on UE'"'"'s measurement report, the signal quality of a neighbor 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 neighbor cell (potential donor base station) is much better than the current donor base station.
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Citations
20 Claims
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1. A subscriber station in a wireless communication system including at least one base station and a plurality of further stations, the subscriber station comprising:
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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 subscriber station and a base station; employing the first wireless link for control signaling between the subscriber station and the base station; determining when a handover is triggered for a handover of the subscriber station 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 subscriber station from the first further station to the second further station while maintaining the first wireless link with the base station for the control signaling. - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment in a wireless communication system including a base station and a plurality of further stations, the user equipment comprising:
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a transceiver configured for exchanging data traffic and signaling by employing wireless links with the base station and one or more further stations of the plurality of further stations, the wireless links including a first wireless link between the user equipment and the base station; and a processor coupled with the transceiver, the processor configured for; employing the first wireless link for control signaling between the user equipment and the base station; determining that a handover is triggered for a handover of the user equipment from a first further station to a second further station, the first further station and the second further station of the plurality of further stations; performing a handover for the data traffic of the user equipment from the first further station to the second further station while maintaining the first link with the base station for the control signaling. - View Dependent Claims (7, 8)
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9. A base station in a wireless communication system including a first further station and a second further station, the base station comprising:
one or more processor circuits coupled to memory and configured for; exchanging control signaling with a subscriber station by a wireless link; determining a need for a handover of data traffic of the subscriber station from the first further station to the second further station; and performing a handover for the data traffic of the subscriber station from the first further station to the second further station while maintaining the wireless link with the subscriber station for the control signaling. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A handover method in a wireless communication system having at least one base station and a plurality of further stations, a subscriber station exchanging data traffic and signaling by employing wireless links with the base station and further stations of the plurality of further stations, the wireless links including a first wireless link between the subscriber station and the base station and a second wireless link provided by one or more of the further stations, the method comprising:
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employing the first wireless link for control signaling between the subscriber station and the base station; determining that a handover is triggered for a handover of the subscriber station 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; and performing a handover for the data traffic of the subscriber station from the first further station to the second further station while maintaining the first link with the base station for the control signaling. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification