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Method of enhanced connection recovery and loss-less data recovery

  • US 9,504,082 B2
  • Filed: 05/12/2015
  • Issued: 11/22/2016
  • Est. Priority Date: 01/18/2012
  • Status: Active Grant
First Claim
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1. A method for enhanced connection recovery, the method comprising:

  • receiving a radio resource control (RRC) reestablishment request message from a user equipment (UE) by a target base station in a mobile wireless communication network, wherein a serving base station information is received in the request message;

    transmitting an X2 radio link failure (RLF) indication to the serving base station, wherein the X2 RLF indication comprises a UE context request and a data forwarding request;

    receiving an X2 handover (HO) request message from the serving base station after transmitting the X2 RLF indication, wherein the X2 HO request message comprises UE context information, packet data convergence protocol (PDCP) serial number (SN) status transfer, and forwarded U-plane data;

    transmitting a response message for RRC reestablishment to the UE after successfully receiving the UE context information; and

    triggering the UE to resume a signaling radio bearer (SRB) and a security mode for the RRC reestablishment based on the UE context information in the X2 HO request message.

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