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Network sharing and reverse single radio voice call continuity

  • US 10,225,765 B2
  • Filed: 10/09/2013
  • Issued: 03/05/2019
  • Est. Priority Date: 04/11/2012
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • requesting, by a network element, handover of a user equipment from a source network to a target network; and

    forwarding to the target network, by the network element, a network identification previously received at the source network, wherein the network identification comprises a public land mobile network identification (PLMN ID) identifying the source network,wherein the PLMN ID received at the source network is from a packet switched network, which was received with a packet switched to circuit switched handover request, and is a network identification of an earlier packet switched network or a network identifier of the earlier packet switched network,wherein the source network comprises a first circuit switched network and the target network comprises a second circuit switched network,wherein the source network selects a roaming partner of the source network to become the target network for the handover based on the PLMN ID,wherein the PLMN ID will result in optimized manner, thereby avoiding extra roaming leg setup, anda neighbor cell list for the user equipment to perform measurement is based on the PLMN ID.

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