Method of enhanced connection recovery and cell selection

Patent metadata

Field	Value
Publication number	US-9049698-B2
Application number	US-201313743612-A
Country	US
Kind code	B2
Filing date	Jan 17, 2013
Priority date	Jan 18, 2012
Publication date	Jun 2, 2015
Grant date	Jun 2, 2015

Abstract

An enhanced connection recovery upon lost RRC connection due to radio link failure (RLF) or handover failure (HOF) is proposed. A UE first establishes an RRC connection in a source cell in a mobile communication network. Later on, the UE detects a failure event and starts an RRC reestablishment procedure in a target cell to restore the RRC connection. In a first novel aspect, a fast RLF process is applied to reduce the outage time in the serving cell. In a second novel aspect, an enhanced cell selection mechanism based on cell prioritization information is applied to reduce the outage time in the target cell. In one embodiment, multi-RAT registration is used to steer cell selection.

First claim

What is claimed is:

1. A method, comprising:
establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station in a mobile communication network;
detecting a radio link problem of the RRC connection and thereby starting a first timer associated with the radio link problem;
starting a second timer upon detecting a triggering condition while the first timer is still running;
initiating an RRC reestablishment procedure with a target cell when t…

Assignees

• Mediatek Inc
• Mediatek Inc

Inventors

• Johansson Per Johan Mikael
• Chen Yih-Shen
• Low Tze-Ping
• Plumb William

Classifications

• H04W36/0061

  Electricity · mapped topic

• H04W76/19 Primary

  Electricity · mapped topic

• H04W48/17

  Electricity · mapped topic

• H04W36/0033

  Electricity · mapped topic

• H04W76/18

  Electricity · mapped topic