Apparatus, and associated method, for facilitating communication handover in packet radio communication system
First Claim
1. In a radio communication system operable to permit communication of packet-formatted data between a first communication station and a second communication station, the first communication station forming a mobile station, and the communication network including a source gateway through which communications are initially effectuated with the mobile station formed of the first communication station and a target gateway through which communications are subsequently selected to be effectuated, an improvement of apparatus for the target gateway for informing the second communication station of selection of target gateway for effectuation of subsequent communications therethrough, said apparatus comprising:
- a default frame generator adapted to receive indications of selection of the target gateway through which to effectuate the subsequent communications, said default frame generator for generating a default frame for transmission to the second communication station, the default frame identifying the target gateway, thereby to inform the second communication station of the selection of the target gateway for the effectuation therethrough of the subsequent communications with the mobile station formed of the first communication station.
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Abstract
Apparatus, and an associated method, for facilitating handover of communications between a source radio gateway and a target radio gateway of a packet radio communication system. Subsequent to handover of communications from the source to the target radio gateways, a default frame is generated at the target gateway. The default frame is forwarded to a communication station operable pursuant to a communication session with a mobile station, the communication session of which has been handed over from the source to the target radio gateway. The default frame identifies, to the communication station, the identity of the target gateway. Thereby, the communication station is informed that the target gateway is the address to which additional data generated at the communication station is to be routed.
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Citations
20 Claims
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1. In a radio communication system operable to permit communication of packet-formatted data between a first communication station and a second communication station, the first communication station forming a mobile station, and the communication network including a source gateway through which communications are initially effectuated with the mobile station formed of the first communication station and a target gateway through which communications are subsequently selected to be effectuated, an improvement of apparatus for the target gateway for informing the second communication station of selection of target gateway for effectuation of subsequent communications therethrough, said apparatus comprising:
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a default frame generator adapted to receive indications of selection of the target gateway through which to effectuate the subsequent communications, said default frame generator for generating a default frame for transmission to the second communication station, the default frame identifying the target gateway, thereby to inform the second communication station of the selection of the target gateway for the effectuation therethrough of the subsequent communications with the mobile station formed of the first communication station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
a timer located at least at the selected one of the second and at least third communication stations in the inactive state when the effectuation of the subsequent communication occurs, said timer for timing periods of absence of incoming data during the communication session with the mobile station, said timer for generating a request to alter communication session parameters if a timed period of the absence of incoming data exceeds a selected time period.
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13. The apparatus of claim 12 wherein the packet-formatted data comprises RTP (real time protocol) media, wherein the at least one selected of the second and at least third communication stations having the communication session in the inactive state further comprises an RTP handling unit and wherein said timer forms a portion of the RTP handling unit.
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14. In a radio communication system operable to permit concurrent communication of packet-formatted data between a mobile station and a second communication station and between the mobile station and a third communication station, the packet-formatted data communicated by way of a communication network having a radio part and a wireline part and the communication network including a source gateway through which communications are initially effectuated and a target gateway through which communications are subsequently selected to be effectuated, at least a selected one of the concurrent communication sessions in an inactive state when the effectuation of the subsequent communication through the target gateway occurs, an improvement of apparatus for the at least the selected one of the second and at least third communication stations, respectively, having the communication session in the inactive state, said apparatus for facilitating uninterrupted communications when the communication sessions between the mobile station and the at least the selected one of the second and at least third communication stations, having the communication session in the inactive state, returns to an active status, said apparatus comprising;
a timer located at the at least the second one of the second and at least third communication stations, said timer for timing periods of absence of incoming data during the communication session with the mobile station, said timer for generating a request to alter communication session parameters if a timed period of the absence of incoming data exceeds a selected timer period.
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15. In a method for communicating packet-formatted data between a first communication station and a second communication station by way of a communication network having a radio part and a wireline part, the first communication station forming a mobile station, and the communication network including a source gateway through which communications are initially effectuated and a target gateway through which communications are subsequently selected to be effectuated, an improvement of a method for the target gateway for informing the second communication station of selection of target gateway for effectuation of subsequent communications therethrough, said method comprising:
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providing to the target gateway indications of selection of the target gateway through which to effectuate the subsequent communications;
generating a default frame at the target gateway responsive to the indications provided to the target gateway during said operation of providing, the default frame identifying the target gateway; and
transmitting the default frame to the second communication station, thereby to inform the second communication station of the target gateway for the effectuation therethrough of the subsequent communications. - View Dependent Claims (16, 17, 18, 19, 20)
forwarding on the uplink data to the second communication station if the uplink data is determined to be valid data;
otherwisesubstituting each uplink data frame of the uplink data determined to be invalid with a default data frame.
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19. The method of claim 15 wherein the default frame generated during said operation of generating comprises a SID (silence indication) frame.
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20. The method of claim 17 comprising the additional operations of:
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timing, at the second communication station absence of incoming data from the mobile station; and
generating a request to alter communication session parameters if a timed period of the absence of the incoming data exceeds a selected time period.
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Specification