Method and apparatus for handoff between source and target access systems
First Claim
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1. A method for inter-system handoff of wireless communications between a source access system and a target access system comprising:
- communicating over the air, by an access terminal (AT), with the source access system in a protocol of the source access system;
initiating, by the AT, handoff preparation with the target access system by tunneling over the source access system signaling in a protocol of the target access system, said signaling relating to establishment of an air interface session with the target access system; and
communicating, by the AT, with the target access system over the air based at least in part on information received from the target access system as part of the handoff preparation, wherein the information received from the target access system as part of the handover preparation is tunneled over the source access system for delivery to the AT.
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Abstract
Systems and methods for switching among heterogeneous networks and inter-working between a source access system and a target access system. An inter-system handoff control component can facilitate setting an IP tunneling by the mobile unit, wherein IP addresses for inter-working security gateway and Radio Access Network of the target access system can be identified. The inter-system handoff control component can then implement tunneling between the source system and the target system, wherein signaling/packeting associated with the target system can be transferred over the source system.
83 Citations
40 Claims
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1. A method for inter-system handoff of wireless communications between a source access system and a target access system comprising:
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communicating over the air, by an access terminal (AT), with the source access system in a protocol of the source access system; initiating, by the AT, handoff preparation with the target access system by tunneling over the source access system signaling in a protocol of the target access system, said signaling relating to establishment of an air interface session with the target access system; and communicating, by the AT, with the target access system over the air based at least in part on information received from the target access system as part of the handoff preparation, wherein the information received from the target access system as part of the handover preparation is tunneled over the source access system for delivery to the AT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus configured for inter-system handoff of wireless communications between a source access system and a target access system, comprising:
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means for communicating over the air with the source access system in a protocol of the source access system; means for initiating handoff preparation with the target access system by tunneling over the source access system signaling in a protocol of the target access system, said signaling relating to establishment of an air interface session with the target access system; and means for communicating with the target access system over the air based at least in part on information received from the target access system as part of the handoff preparation, wherein the information received from the target access system as part of the handover preparation is tunneled over the source access system. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An access terminal configured for inter-system handoff of wireless communications between a source access system and a target access system, comprising:
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a processor; a memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; communicate over the air with the source access system in a protocol of the source access system; initiate handoff preparation with the target access system by tunneling over the source access system signaling in a protocol of the target access system, said signaling relating to establishment of an air interface session with the target access system; and communicate with the target access system over the air based at least in part on information received from the target access system as part of the handoff preparation, wherein the information received from the target access system as part of the handover preparation is tunneled over the source access system. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. A computer program product for inter-system handoff of wireless communications between a source access system and a target access system, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to:
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communicate over the air, by an access terminal (AT), with the source access system in a protocol of the source access system; initiate, by the AT, handoff preparation with the target access system by tunneling over the source access system signaling in a protocol of the target access system, said signaling relating to establishment of an air interface session with the target access system; and communicate, by the AT, with the target access system over the air based at least in part on information received from the target access system as part of the handoff preparation, wherein the information received from the target access system as part of the handover preparation is tunneled over the source access system for delivery to the AT. - View Dependent Claims (37, 38, 39, 40)
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Specification