System and method for handoffs between technologies
First Claim
1. An integrated chassis to reside in a communication network, the integrated chassis comprising:
- a processor;
a memory;
a plurality of session managers to share the processor, the plurality of session managers comprising a first session manager to receive control information and data from a mobile node in a first access technology and to set up a session for the mobile node with the first access technology, each of the plurality of session managers to communicate with a first access technology stack and a second access technology stack, the first access technology stack to manage packet processing for the first access technology, the second access technology stack to manage packet processing for a second access technology; and
an access technology demux manager to select the first session manager for the session from among the plurality of session managers to communicate with the mobile node with the first access technology,wherein the access technology demux manager, in response to a handoff to the second access technology, is to select the same first session manager from among the plurality of session managers where an existing session is set up in the first access technology such that the mobile node changes to the second access technology and retains the same first session manager;
wherein the second access technology stack is to communicate with the first session manager to enable communication over the second access technology with the mobile node, the second access technology stack to implement an access service network gateway (ASNGW).
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Accused Products
Abstract
Systems and methods for providing a handoff between technologies are disclosed. An intra-technology handoff occurs where the same integrated chassis handles the session for the different access technologies. In an intra-technology handoff, the same IP address and the session can be maintained through the handoff. The mobile node can undergo a handoff without issuing a registration request in some embodiments. An inter-technology handoff occurs from one integrated chassis to another integrated chassis. The integrated chassis can preserve session and context information in a session manager and in a handoff from one access technology to another the same session manager can be chosen with the session and context information remaining intact even though the access technology has changed. The integrated chassis can provide an access technology handoff where the core network does not notice any change and applications running on or delivered to the mobile node are not effected.
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Citations
22 Claims
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1. An integrated chassis to reside in a communication network, the integrated chassis comprising:
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a processor; a memory; a plurality of session managers to share the processor, the plurality of session managers comprising a first session manager to receive control information and data from a mobile node in a first access technology and to set up a session for the mobile node with the first access technology, each of the plurality of session managers to communicate with a first access technology stack and a second access technology stack, the first access technology stack to manage packet processing for the first access technology, the second access technology stack to manage packet processing for a second access technology; and an access technology demux manager to select the first session manager for the session from among the plurality of session managers to communicate with the mobile node with the first access technology, wherein the access technology demux manager, in response to a handoff to the second access technology, is to select the same first session manager from among the plurality of session managers where an existing session is set up in the first access technology such that the mobile node changes to the second access technology and retains the same first session manager; wherein the second access technology stack is to communicate with the first session manager to enable communication over the second access technology with the mobile node, the second access technology stack to implement an access service network gateway (ASNGW). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A network communication method comprising:
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receiving a request from a mobile node at a gateway to begin a session in a first access technology; in response to the request, providing the mobile node with identification information used to identify the mobile node in a communication network and setting up a first access technology stack to manage packet processing in the first access technology and a session instance with an assigned session manager selected from among a plurality of session managers which reside at the gateway to manage identification information and communication with the communication network, the session managers each configured for communicating with the first access technology or a second access technology; receiving from the mobile node control information and data at the first access technology stack; while the mobile node is communicating in a session with the first access technology, determining to begin a session with the mobile node in response to a handover to the second access technology; and at the gateway, providing the same identification information and selecting the same session instance with the same assigned session manager to manage identification information and communication with the communication network and setting up a second access technology stack to manage packet processing in the second access technology to enable communication with the mobile node; wherein the second access technology stack is to communicate with the assigned session manager to enable communication over the second access technology with the mobile node, the second access technology stack to implement an access service network gateway (ASNGW). - View Dependent Claims (12, 13, 14, 15, 16)
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17. Logic encoded in one or more non-transitory media that includes code for execution and when executed by a processor performs operations comprising:
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receiving a request from a mobile node at a gateway to begin a session in a first access technology; in response to the request, providing the mobile node with identification information used to identify the mobile node in a communication network and setting up a first access technology stack to manage packet processing in the first access technology and a session instance with an assigned session manager selected from among a plurality of session managers which reside at the gateway to manage identification information and communication with the communication network, the session managers each configured for communicating with the first access technology or a second access technology; receiving from the mobile node control information and data at the first access technology stack; determining to begin a session with the mobile node in response to a handover to the second access technology; and at the gateway, providing the same identification information and selecting the same assigned session manager from among the plurality of session managers to manage identification information and communication with the communication network and setting up a second access technology stack to manage packet processing in the second access technology to enable communication with the mobile node; wherein the second access technology stack is to communicate with the assigned session manager to enable communication over the second access technology with the mobile node, the second access technology stack to implement an access service network gateway (ASNGW). - View Dependent Claims (18, 19, 20, 21, 22)
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Specification