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Circuit domain fallback method, base station and terminal

A circuit domain fallback and base station technology, applied in the field of communications, can solve the problems of inability to normally complete CS voice services, CSFB failure, poor user experience, etc., to avoid fallback failure, improve success rate, and ensure the effect of user perception

Active Publication Date: 2020-11-06
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Both of the existing two CS domain fallback strategies will probabilistically cause CSFB failure or call drop, so CS voice services cannot be completed normally, resulting in more 4G user complaints and poor user experience

Method used

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  • Circuit domain fallback method, base station and terminal
  • Circuit domain fallback method, base station and terminal
  • Circuit domain fallback method, base station and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] image 3 It is a flow chart of the circuit domain fallback method provided by Embodiment 1 of the present invention. Such as image 3 As shown, the present invention provides a circuit domain fallback method, the execution subject of which is a base station, and the specific steps of the method are as follows:

[0054] S101. The base station receives a circuit domain fallback service request sent by a terminal, and sends a different-system frequency point measurement control message to the terminal, wherein the different-system frequency point measurement control message includes a different-system frequency point to be measured.

[0055] In this embodiment, when the terminal has a voice service requirement (calling or called), the terminal sends a circuit domain fallback service request to the base station (eNodeB), and the base station returns the inter-system frequency after receiving the circuit domain fallback service request. The point measurement control messag...

Embodiment 2

[0070] On the basis of the foregoing embodiments, the different-system frequency point measurement control message further includes a cell scrambling code corresponding to the different-system frequency point.

[0071]In this embodiment, in addition to carrying the different system frequency to be measured in the different system frequency point measurement control message, the base station also carries the cell scrambling code corresponding to the different system frequency point, where the cell scrambling code is used to distinguish the Different cells of the system frequency point, for example, the cell scrambling codes 266, 472, and 473 under the frequency point 10713 and the cell scrambling code 25 under the frequency point 10663 in Table 2 above.

[0072] Further, the base station described in S102 sequentially receives the measurement report reported by the terminal after measuring the signal strength of different system frequency points, specifically including:

[0073...

Embodiment 3

[0080] Figure 5 It is a flow chart of the circuit domain fallback method provided by Embodiment 3 of the present invention. Such as Figure 5 As shown, this embodiment provides a circuit domain fallback method, the execution subject of which is a terminal, and the specific steps of the method are as follows:

[0081] S301. The terminal sends a circuit domain fallback service request to the base station.

[0082] In this embodiment, the terminal may be a smart phone, a tablet computer with a call function, and other devices. When the terminal has a voice service requirement (calling or called), the terminal sends a circuit domain fallback service request to the base station (eNodeB).

[0083] S302. The terminal receives the different-system frequency point measurement control message sent by the base station, wherein the different-system frequency point measurement control message includes the different-system frequency point to be measured.

[0084] In this embodiment, af...

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Abstract

The invention provides a circuit switched fallback (CSFB) method, a base station and a terminal. A delay decision timer is added on a base station side, and the base station starts the delay decisiontimer when a first measurement report is received and acquires an inter-system frequency point with the highest signal strength and transmits the inter-system frequency point with the highest signal strength to the terminal after timing of the delay decision timer arrives at preset time, so that the terminal falls back to the inter-system frequency point with the highest signal strength to initiate a voice service request; the success rate of CSFB is increased; a fallback instruction is transmitted to the terminal not only according to the first measurement report; the randomness in selectinga first inter-system frequency point when the terminal measures the signal strength is avoided; fallback failure of the terminal caused by fallback through an inter-system frequency point with a relatively weak signal is avoided; CSFB call delay is not increased excessively; and user perception is ensured.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a circuit domain fallback method, a base station and a terminal. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) network designed based on the all-IP design of the packet domain cannot bear traditional circuit domain voice services. The target solution for carrying voice is the VoLTE (Voice The Over LTE) solution carries a VoIP service (Voice over Internet Protocol, VoIP). However, before the VoLTE industry is mature and the LTE network is ready, it is still necessary to use the 2G / 3G network to carry voice, that is, to use the CSFB (Circuit Switched Fallback) solution to directly use the 2 / 3G network to provide voice services. The basic idea of ​​the CSFB solution is that when the terminal resides in the idle state of the LTE network or in the connection state of the data service, when there is a voice service demand (callin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W24/08H04W24/10H04W36/00H04W36/14H04W36/16H04W36/38
Inventor 姚赛彬杨飞虎韦巍许国平
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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