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Method for selecting PLMN of terminal in wireless communication system and apparatus for same

  • US 10,616,829 B2
  • Filed: 02/02/2016
  • Issued: 04/07/2020
  • Est. Priority Date: 02/02/2015
  • Status: Active Grant
First Claim
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1. A method for a user equipment (UE) to perform public land mobile network (PLMN) selection associated with proximity services (ProSe) direct communication in a wireless communication system, the method comprising:

  • camping, by the UE, on a first PLMN in a normal service state;

    in response to the first PLMN not providing ProSe direct communication resources, selecting, by the UE, a second PLMN providing ProSe direct communication resources;

    performing, by the UE, a registration on the second PLMN;

    receiving, by the UE, a failed registration code of “

    PLMN not allowed”

    due to failing of the registration on the second PLMN; and

    performing, by the UE, the ProSe direct communication on the registration-failed second PLMN in a limited service state,wherein the UE remains camped on the first PLMN in the normal service state and does not perform an additional PLMN selection during a duration of the ProSe direct communication in the registration-failed second PLMN, after entering the limited service state.

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