Method for accelerating cell search and mobile communication terminal
A mobile communication terminal and cell search technology, applied in the field of digital communication methods and terminals, can solve the problems of no storage in the terminal and a long time for the terminal to capture the network, so as to reduce power consumption, save the time for capturing the network, and improve the standby time. Effect
Active Publication Date: 2014-12-10
NANJING ZHONGXING SOFTWARE
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Problems solved by technology
[0010] According to the current method of capturing cells, if the user turns on for the first time or the user moves to another place or the user moves from an OOS area to an area with a signal, because the terminal does not store the information of the registered network before the shutdown, or because the stored network information and the current network information Inconsistent, the time for the terminal to capture the network will be very long
Moreover, generally an operator will only use a few frequency points in a frequency band, and will not use hundreds of frequency points in the entire frequency band. Therefore, the terminal will spend most of its time searching for frequencies that the operator does not use at all. point
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[0035] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0036] The protocol stack of the mobile terminal is generally divided into the NAS layer and the AS layer. The NAS is mainly responsible for the protocol interaction with the core network, and the AS is mainly responsible for the interaction with the base station and the base station controller, and establishes an air interface connection for the NAS. After the terminal is powered on or returns to a service area from an unserved area, the NAS first reads the current PLMN from the terminal's SIM / USIM card, and then searches the frequency point used by the current PLMN from the operator's frequency point information list (operator For a list of frequency poi...
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A method and mobile communication terminal for accelerating cell search are disclosed by the invention. When a cell frequency point is searched by the terminal, frequency point information used by a current public land mobile network (PLMN) is searched in an operator frequency point information list of the terminal; the searched frequency point information is added to a registered cell list of the terminal; and then an available cell frequency point is searched in the registered cell list. The frequency point information used by the current PLMN is saved in the registered cell list, so an available cell can be quickly searched when the terminal searches the network, therefore the speed for the terminal to capture the network is greatly accelerated, the power consumption of the terminal is also reduced, and the standby time of the terminal is prolonged.
Description
technical field [0001] The present invention relates to a digital communication method and a terminal, in particular to a method for speeding up cell search and a mobile communication terminal. Specifically, when the NAS layer of the terminal protocol stack starts to search for a network, the frequency point used by the current PLMN is The information is added to the terminal's registered cell list (Strored cell list), so as to speed up the terminal's speed of capturing the network. Background technique [0002] At present, the process of the terminal being powered on and capturing the network from the OOS (Out Of Service) area to the signal area is as follows: figure 1 Shown: [0003] After obtaining the current PLMN, the NAS layer of the terminal protocol stack sends a network search request to the AS layer of the terminal protocol stack. The NAS checks whether there is an RPLMN (the last registered PLMN, stored in the SIM / USIM card) in the terminal, if not, selects the ...
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IPC IPC(8): H04W48/16H04W48/20
CPCH04W48/16
Inventor 郑宏涛
Owner NANJING ZHONGXING SOFTWARE