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Method and system for implementing circuit domain fallback and circuit domain fallback detection

A technology of circuit domain fallback and circuit domain services, which is applied in the field of circuit domain fallback and circuit domain fallback detection, and can solve problems such as no circuit domain fallback method, inability to directly establish CS calls, and LTE not supported.

Inactive Publication Date: 2016-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of LTE overlay network bearer, and LTE does not support the characteristics of CS (circuit domain) services
CS calls cannot be established directly in the LTE cell during the process of the terminal initiating a call and being called
At this time, the terminal needs to fall back to the 3G or GSM (Global System for Mobile Communications) network to process the circuit domain service, but there is no specific circuit domain fallback method at present

Method used

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  • Method and system for implementing circuit domain fallback and circuit domain fallback detection
  • Method and system for implementing circuit domain fallback and circuit domain fallback detection
  • Method and system for implementing circuit domain fallback and circuit domain fallback detection

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Embodiment Construction

[0047] In general, on the one hand, a redirection-based circuit domain fallback method when a terminal is in an LTE connection state includes the following steps:

[0048] 1. The LTE network sends a circuit domain service notification to the terminal;

[0049] 2. The terminal sends a circuit domain service request to the LTE network;

[0050] 3. The LTE network releases the RRC (Radio Resource Control) connection with the terminal, and notifies the terminal to redirect to the designated GSM (Global System for Mobile Communications) network;

[0051] 4. The terminal tunes the frequency to the above-specified GSM network, and establishes a circuit domain service on the GSM network.

[0052] The specific operation mode of step 1 may be as follows: the LTE network sends a DLInformationTransferNAS:CSSERVICENOTIFICATION (downlink information transmission non-access stratum: circuit domain service notification) message to the terminal to notify the terminal to initiate a circuit dom...

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Abstract

The invention discloses a method and system for realizing circuit domain fallback. The long-term evolution network control terminal can initiate a circuit domain service request and trigger the terminal to redirect to the designated Global Mobile Communications System network; the terminal is tuned to the designated Global System for Mobile Communications Network, and establish circuit domain services in the Global System for Mobile Communications Network. The method and system of the present invention can ensure that the terminal falls back to the third generation communication system or the Global Mobile Communications System network to perform circuit domain services; similarly, the technology of the present invention to implement circuit domain fallback detection can also ensure that the terminal falls back to Conduct circuit domain services in the third generation communication system or Global System for Mobile Communications network.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to a method and system for implementing circuit domain fallback and circuit domain fallback detection in the LTE (LongTimeEvolution, long-term evolution) technology. Background technique [0002] The third generation (3G) communication system adopts the access method of code division multiple access to support multimedia services and has better communication security and communication quality than the second generation communication system; higher competitiveness. However, in order to meet people's higher communication needs, provide better communication services and ensure that 3G technology is more competitive. 3GPP (3rdGenerationPartnershipProject, 3rd Generation Partnership Project) started a 3GLTE research project. [0003] At present, LTE has formed a complete wireless communication standard and is gradually being promoted worldwide. Its test network and experimen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/24H04W68/00H04W76/06
CPCH04W36/00224
Inventor 马伟
Owner ZTE CORP