CS calling method, CS calling device and user equipment

A calling method and calling device technology, applied in the field of communication, can solve problems such as inability to receive circuit domain service signals, small coverage of 5G networks, and failure to support single wireless voice call continuity, so as to improve user experience, smooth CS calls, The effect of ensuring service continuity

CN108934048AInactive Publication Date: 2018-12-04SPREADTRUM COMM (SHANGHAI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2018-12-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a CS calling method, a CS calling device and user equipment. The CS calling method includes: receiving or transmitting a call request when camping in a new radio system or an LTE system, selecting a traditional cell for camping and accessing when confirming a preferred CS call, wherein the traditional cell supports a CS service, and making a CS call to the network side by using the accessed traditional cell. A smooth CS call can be achieved through the technical solution.
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Description

technical field

[0001] The present invention relates to the technical field of communications, and in particular to a CS calling method, device and user equipment. Background technique

[0002] The fourth-generation mobile communication technology (4th-Generation, 4G) is a fully packet-switched network, and the user equipment (User Equipment, UE) cannot receive / send circuit domain service signals when accessing through the Long Term Evolution (LTE) system . In order to enable the UE to initiate circuit switching (Circuit Switching, CS) services such as voice services and receive paging of CS services such as voice services under LTE access, and to enable the UE to perform packet switching (Packet Switching) in the LTE network , PS) business is correctly processed, the introduction of the Circuit Switched Fallback (Circuit Switched Fallback, CSFB) technology.

[0003] In prior art, please refer to figure 1 , figure 1 It is a schematic diagram of data interaction of a CS c...

Examples

Embodiment Construction

[0030] As mentioned in the background, in the new radio (New Radio, NR) system, such as the fifth-generation mobile communication technology (5th-Generation, 5G), CSFB to 2G / 3G is currently not supported. 5G still requires CS calls. For example, the charging method between CS and IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) calls may change, and CS calls may be cheaper in the case of roaming. In the initial deployment stage of 5G, compared with 2G / 3G / 4G networks, 5G network coverage is small, and from 5G to 2G / 3G does not support single radio voice call continuity (Single Radio Voice Call Continuity, SRVCC), cannot guarantee Service Continuity. Then, when the UE resides in the new wireless system and needs a CS call, how to realize the CS call is an urgent problem to be solved.

[0031] The technical solution of the present invention selects a traditional cell for access when the user equipment needs a CS call; that is to say, it can smoothly move from a new wirele...