Method and apparatus for fast inter-system handover
First Claim
1. A method of wireless communication, comprising:
- establishing communication by a mobile device with a first system utilizing a first radio access technology;
identifying by the mobile device a handover of the mobile device from the first system utilizing the first radio access technology to a second system utilizing a second radio access technology disparate from the first radio access technology;
preparing resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through a Mobile Management Entity (MME) of the first system using a Layer 2 (L2) tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and
encapsulating the handover preparation signaling by the mobile device into a number of messages directed to the second system, wherein the encapsulating comprises forming one or more signaling messages associated with the first radio access technology that include information directed to the MME.
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Accused Products
Abstract
Systems and methodologies are described that facilitate inter-system handover in a wireless communication system. Various aspects described herein provide for handover techniques that enable a target system to be prepared by a mobile device via a source system in order to minimize specific changes required to source system and/or target system. Techniques are described herein in which the radio link of a source system can be utilized to tunnel signaling messages which are in a format understood by a destination node in a target system. Further, fast inter-access handover can be facilitated by establishing a simple generic transmission tunnel between respective network nodes in source and target systems that handle intra-system mobility and providing a Layer 2 (L2) tunneling mechanism over the radio interface of each involved system technology.
83 Citations
26 Claims
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1. A method of wireless communication, comprising:
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establishing communication by a mobile device with a first system utilizing a first radio access technology; identifying by the mobile device a handover of the mobile device from the first system utilizing the first radio access technology to a second system utilizing a second radio access technology disparate from the first radio access technology; preparing resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through a Mobile Management Entity (MME) of the first system using a Layer 2 (L2) tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and encapsulating the handover preparation signaling by the mobile device into a number of messages directed to the second system, wherein the encapsulating comprises forming one or more signaling messages associated with the first radio access technology that include information directed to the MME. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communications apparatus, comprising:
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a memory of a mobile device that stores data relating to a first system, a first radio access technology utilized by the first system, a second system, and a second radio access technology utilized by the second system that is disparate from the first radio access technology; and a processor of the mobile device configured to; identify a handover of the mobile device from the first system utilizing the first radio access technology to the second system utilizing the second radio access technology; prepare resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through a Mobility Management Entity (MME) of the first system using a Layer 2 (L2) tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and encapsulate the handover preparation signaling by the mobile device into a number of messages directed to the second system by forming one or more signaling messages associated with the first radio accessing technology that include information directed to the MME. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus that facilitates handover of a mobile device, the apparatus comprising:
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means for communicating signaling to a first system utilizing a first radio access technology; means for identifying a second system utilizing a second radio access technology disparate from the first radio access technology; means for preparing resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling from the mobile device to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through to a Mobility Management Entity (MME) of the first system over a Layer 2 (L2) tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and means for encapsulating the handover preparation signaling into a number of messages directed to the second system, wherein the encapsulating comprises forming one or more signaling messages associated with the first radio access technology that include information directed to the MME. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A non-transitory computer-readable medium comprising computer-readable program code stored thereon, the computer-readable program code comprising:
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code for establishing communication by a mobile device with a first system utilizing a first radio access technology; code for identifying a handover of a mobile device from the first system utilizing the first radio access technology to a second system utilizing a second radio access technology disparate from the first radio access technology; code for preparing resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through to a Mobility Management Entity (MME) of the first system using a L2 tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and code for encapsulating the handover preparation signaling into a number of messages directed to the second system, wherein the encapsulating comprises forming one or more signaling messages associated with the first radio access technology that include information directed to the MME.
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26. An integrated circuit adapted for use in a mobile device and configured to execute computer-executable instructions, the instructions comprising:
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establishing communication with a first system utilizing a first radio access technology; identifying a handover of the mobile device from the first system utilizing the first radio access technology to a second system utilizing a second radio access technology disparate from the first radio access technology; preparing resources of the second system for the handover of the mobile device to the second system by tunneling handover preparation signaling from the mobile device to the second system via the first system, wherein the tunneling comprises communicating the handover preparation signaling through a Mobility Management Entity (MME) of the first system using a Layer 2 (L2) tunnel, and wherein the handover preparation signaling comprises signaling associated with the second radio access technology and comprising at least a portion of an access authentication procedure within the second system; and encapsulating the handover preparation signaling by the mobile device into a number of messages directed to the second system, wherein the encapsulating comprises forming one or more signaling messages associated with the first radio access technology that include information directed to the MME.
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Specification