Network searching method and mobile terminal after coverage loss

Abstract

The invention provides a network searching method and a system after a coverage loss. The network searching method comprises the following steps of: after the coverage of a mobile terminal is lost, determining a frequency point to be scanned preferentially according to the probability of an occurrence scene of the coverage loss; and starting scanning and network searching from the frequency point to be scanned preferentially. In the method, the frequency point with a high probability of the occurrence scene of the coverage loss is scanned after the coverage loss to ensure that the mobile terminal can find a network as quick as possible and returns to a coverage area, so frequent meaningless frequency sweeps are not needed, and the mobile terminal not only can access to the network more quickly but also can save electric quantity and prolong the standby time.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a network searching method after coverage loss and a mobile terminal. Background technique [0002] When users use mobile communication devices, they often encounter no signal, that is, coverage loss, for example, entering an elevator, tunnel, or mountain without signal coverage. At this time, the mobile phone will frequently search for available networks until it finds an available cell that can provide normal services. Lots of drain. The general process of current typical PLMN and cell selection is: first, try to reside on the RPLMN (registered public land mobile communication network) stored in the card (SIM or USIM, unless otherwise specified below), use The cell information stored in the cell phone previously resided in the cell. After the cell fails to reside, the frequency scan is initiated immediately. 23.122) initiate residency in turn. [0003] In the daily use...

AI Technical Summary

Problems solved by technology

[0003] In the daily use of UE (User Equipment), the coverage loss that occurs most frequently is short-lived, such as entering an elevator, driving into a tunnel, etc., and after getting out of the elevator or tunnel, it is still the same cell; The blind area under the same RPLMN, that is, the area where there is no signal coverage at the junction of the cell and the cell; another kind of coverage loss that often occurs is entering a high mountain, remote area or basement, etc., there may be no network signal coverage, and The signals of all networks may be shielded. At this time, the coverage loss time is generally longer, so the search time for all frequency points will be longer.

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