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Attachment indicator for handover between heterogenous networks

  • US 8,483,179 B2
  • Filed: 08/10/2010
  • Issued: 07/09/2013
  • Est. Priority Date: 08/24/2009
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • receiving, in a WiMAX Signaling forwarding function (SFF) node, a preregistration request for a mobile station;

    in response to the preregistration request, generating a flag to indicate whether the request is being processed by the WiMAX Signaling forwarding function node; and

    forwarding a preattachment request from the WiMAX Signaling forwarding function node to an access gateway, wherein the preattachment request comprises the flag, wherein;

    the access gateway comprises a WiMAX access service network gateway (ASN-GW); and

    the access gateway ASN-GW receives an IM_Exit_State_Change_Rsp with R6_Attachment_Type from a preregistered ASN-GW over an R4 interface and, in response thereto, includes additional logic to invoke a Mobile IP (MIP4) or Proxy Mobile IP (PMIP6) procedures.

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