A frequency scanning method for a wireless terminal

Abstract

The invention brings forward a frequency scanning method of a wireless terminal. The method comprises the following steps that: after a terminal is accessed to a network, if a network side supports effective frequency point configuration, an effective frequency point set is obtained; the terminal constructs and maintains a historical frequency point table A, a table C with all frequency points sorted in a descending order based on powers, an effective frequency point set table D, a table AD with the tables A and D sorted mixedly in a descending order based on powers, and a full-frequency table E; and when synchronization is carried out again after the terminal is in an out-of-step mode, if the terminal is in a service area, the table AD is scanned continuously by many times, and then the scanning table C is scanned if synchronization is still not realized; and if the terminal is not in the service area, only the portions, with the highest powers, of the table AD and the table C as well as one part of the table E are scanned. According to the method provided by the invention, the terminal synchronization speed can be improved; and scanning time on the condition of service area exceeding by the terminal can be reduced, thereby reducing the terminal power consumption.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a frequency scanning method for a wireless terminal. Background technique [0002] At present, most communication terminals adopt the method of frequency scanning to achieve cell synchronization. When the terminal is turned on, it first performs frequency scanning on historical frequency points and adjacent frequency points. If the synchronization fails, it scans in the entire frequency band. [0003] At present, most communication terminals adopt a sleep method to save power of the terminal. There are two main types of sleep: deep sleep and light sleep. When the terminal is in the IDLE state, the hardware that consumes more power in the terminal is turned off, so that the terminal is in a light sleep state. When the terminal exceeds the service area, it cannot access the network. In order to reduce the power consumption of the terminal, all hardware of the terminal is tur...

AI Technical Summary

Problems solved by technology

[0004] For cell search, if you follow the common frequency scanning method, due to the large number of scanning frequency points, the synchronization of the terminal will usually be slow. At the same time, when the terminal exceeds the service area, the system frequency band may be relatively wide. , will greatly increase the synchronization time of the terminal, resulting in an increase in the power consumption of the terminal, and the terminal power saving method of light sleep will not have any effect at this time, and the effect of deep sleep will not meet the needs of users.

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