Mobile communication devices and location registration methods

摘要

A mobile communication device with a wireless module and a controller module is provided. The wireless module performs wireless transceiving to and from a first service network. The controller module transmits a location update request message to a first cellular station of the first service network via the wireless module, and receives a location update rejection message, which comprises a rejection cause indicating a network related failure, from the first cellular station via the wireless module. Also, the controller module transmits another location update request message to a second cellular station of the first service network via the wireless module in response to the location update rejection message. Particularly, the first cellular station and the second cellular station belong to a first location area and a second location area, respectively.

主权项

1. A mobile communication device, comprising:
a wireless module, arranged for performing wireless transceiving to and from a first service network; and a controller module configured to:
transmit a first tracking area update request message to a first cellular station in a first tracking area of a first service network via the wireless module;receive a first tracking area update rejection message from the first cellular station via the wireless module; andin response to the first tracking area update rejection message when the first tracking area update rejection message comprises a first rejection cause indicating a first network related failure, transmit a second tracking area update request message to a second cellular station in a second tracking area of the first service network via the wireless module before the mobile communication device performs a Public Land Mobile Network (PLMN) search procedure, wherein the first rejection cause is a “Cause #17-Network failure” defined in a 3GPP TS 24.301 specification.