Method and device for cell selection information sending and configuration and cell selection method

Abstract

The invention discloses a method for cell selection information sending. The method includes the steps that a network side sending terminal obtains preferred frequency information or preferred frequency information and access technology information for cell selection. The invention further discloses a configuration method of the cell selection information, wherein the method includes the step of directly configuring the preferred frequency information or the preferred frequency information and the ACT information in the sending terminal for cell selection. The invention also discloses a device for achieving the preceding methods and a cell selection method. The preferred frequency information or the preferred frequency information and the access technology information which can be accessed after the terminal is off line are configured in the terminal or sent to the terminal through a network side. Therefore, after the terminal is off line, cell searching can be carried out according the configured preferred frequency information of the terminal, once a cell corresponding to preferred frequency is searched, access can be achieved, and time delay is greatly reduced when the cell is accessed again.

Description

technical field [0001] The invention relates to a cell selection technology after a terminal goes off-net, and in particular to a method and device for sending cell selection information, a configuration method and device for cell selection information, and a cell selection method. Background technique [0002] In the scale test, it was found that when the terminal performs (FTP, File Transfer Protocol) download, Thunder download, IE web page download and other services, due to the discontinuous network coverage of time-sharing long-term evolution (TD-LTE, Time Division Long Term Evolution), When the terminal leaves the coverage of the TD-LTE network, or after the terminal has a radio link failure (RLF, Radio Link Failure), when performing cell reselection, it takes about 25-30 seconds to be able to access the time division synchronization code for cell reselection Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronous Code Division Mult...

AI Technical Summary

Problems solved by technology

However, due to the discontinuous coverage of the TD-LTE network, the terminal RLF is disconnected from the network, and the terminal cannot search for a valid network on RPLMN / ACT (TD-LTE). In the working frequency band, search for available frequency points with a channel grid of 100kHz, and then search for available frequency points for other access technologies after scanning all TD-LTE frequencies, such as TD-SCDMA / Global System of Mobile Communication (GSM, Global System of Mobile communication ) and other available frequencies

The reselection delay after the terminal is disconnected from the network is too long, which will seriously affect the user experience

If the terminal is forced to scan only certain fixed frequency points (such as the frequency points currently used by China Mobile) or fixed frequency points of certain technologies, the terminal may not be able to access the network of the roaming operator when roaming (with The frequencies used under the configured China Mobile network are different)

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