Cell switching method, terminal and core network equipment

Abstract

The embodiment of the invention discloses a cell switching method, a terminal and core network equipment. The cell switching method comprises the following steps: enabling the terminal to join in current calling in a broadband service cell, wherein the terminal registers both in the broadband service cell and a narrowband service cell; acquiring information of a service channel of the current calling in a target narrowband cell by the terminal; and switching the terminal to the target narrowband cell from the wideband service cell to continue the current calling according to the acquired information of the service channel. By adopting the embodiment of the invention, switching between the wideband cell to the narrowband cell can be achieved, and call drop can be avoided.

Description

technical field [0001] The embodiment of the present invention relates to the field of communication technologies, and in particular to a cell handover method, a terminal and core network equipment. Background technique [0002] In the field of professional trunking communications, Police Digital Trunking (PDT) system, Terrestrial Trunked Radio (Tetra) system and P25 (Project25) are several mainstream systems, all of which belong to narrowband trunking systems. Narrowband trunking communication systems such as PDT, Tetra, and P25 can provide users with good narrowband voice services, but they have the disadvantage of low transmission rate in data services, which cannot meet the growing needs of broadband services such as images and data. The problem is that the industry is generally optimistic about the broadband and narrowband trunking integration of narrowband systems and broadband systems. Broadband systems such as Long Term Evolution (LTE) systems, broadband and narrowba...

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Problems solved by technology

[0004] Both the existing broadband trunking and narrowband trunking standards support the handover function: for broadband trunking terminals, the handover scheme defined by the broadband standard (for example: LTE handover) can be used; for narrowband trunking terminals, the handover scheme defined by the narrowband trunking standard (such as : PDT handover); for a dual-mode terminal, a broadband handover scheme can be used to switch from a broadband cell to a broadband cell, and a narrowband handover scheme can be used to switch from a narrowband cell to a narrowband cell. There are standards and technical specifications that are not covered

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