csfb network switching method, mobile management entity and base station

Abstract

The invention provides a CSFB (Circuit Switched Fallback) network switching method, an MME (Mobile Management Entity) and a base station. The method comprises the steps that the MME receives a searching result transmitted by the base station, wherein the searching result is obtained by searching 3G (3-Generation) or 2G (2-Generation) cells in a switching process executed by a terminal in an LTE (Long Term Evolution) network; the MME transmits request information of obtaining a terminal state to the base station; the MME receives the terminal state information transmitted by the base station, wherein the state information indicates whether the terminal has a PS (Packet Switched) service or not; the MME selects one or a plurality of 3G or 2G cells which are matched with the service of the terminal from the searching result and stores the 3G or 2G cells in the form of a list; if the terminal needs to perform CSFB, the MME selects a destination 3G or 2G cell from the list, transmits a CSFB command to the base station and transmits the information of the selected destination 3G or 2G cell to the base station to enable the base station to switch the terminal to the selected destination 3G or 2G network cell.

Description

Technical field [0001] The present invention relates to the technical field of network communication, in particular to a CSFB network switching method, a mobility management entity and a base station. Background technique [0002] LTE is an evolution of 3G technology and a transition technology from 3G to 4G. LTE network is a mobile communication network based on full packetization with high data rate, low latency, supporting multiple access technologies. CSFB is a voice solution in the early stage of LTE network development. It is a transitional voice solution chosen by most operators. That is, terminals with LTE capability cannot send and receive circuit domain service signals in LTE networks. Under LTE access, CS services such as voice can be initiated, and the paging of CS services such as voice can be received, and the PS services that are being performed by the terminal in the LTE network can be correctly processed, resulting in the CSFB technology. [0003] The general CSFB...

AI Technical Summary

Problems solved by technology

[0004] In this handover mode, whenever the terminal needs to initiate a CS service and perform CSFB fallback, the terminal needs to perform measurements again, including searching for 3G or 2G target cells, obtaining target cell information, and judging the load status of the target cell, etc., to make CSFB fallback The access delay is relatively large, which affects the user experience

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