A method and device for intercommunication and conversion of tfo and trfo between different systems

A technology supported by different systems and systems, applied in voice analysis, instruments, etc., can solve problems such as the inability to realize broadband voice service interoperability

Active Publication Date: 2018-03-20
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In view of the above, the present invention proposes a method and device for interworking and conversion of TFO and TrFO between different systems, so as to solve the problem that in the 3GPP2 system and 3GPP system, one end system adopts TFO, and the other end system adopts TrFO, which cannot realize the interoperability of broadband voice services

Method used

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  • A method and device for intercommunication and conversion of tfo and trfo between different systems
  • A method and device for intercommunication and conversion of tfo and trfo between different systems

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0079] Terminal A in the 3GPP2 system supports EVRC and EVRC-WB coding, terminal B in the 3GPP system supports AMR and AMR-WB coding, and terminal A initiates a call to terminal B.

[0080] The 3GPP2 system supports TFO technology, and the 3GPP system supports TrFO technology.

[0081] Terminal A initiates a call and informs the wireless access network device of the supported EVRC and EVRC-WB coding lists, and the wireless access network device carries the coding capability list (supporting EVRC and EVRC-WB) supported by both the terminal and the wireless access network device For MSCe and GMSCe, GMSCe is routed to 3GPP's GMSCe'.

[0082] 3GPP's GMSCe' establishes a signaling route with 3GPP MSCe' based on the HLR addressing result, and GMSCe' and MSCe', 3GPP wireless access network equipment, and terminal B conduct code negotiation, and select the same code type, giving priority to wideband voice The principle of encoding, AMR-WB encoding is selected in the 3GPP system, GMSC...

Embodiment 2

[0086] Terminal A in the 3GPP2 system supports EVRC and EVRC-WB coding, terminal B in the 3GPP system supports AMR coding, and terminal A initiates a call to terminal B.

[0087] The 3GPP2 system supports TFO technology, and the 3GPP system supports TrFO technology.

[0088] Terminal A initiates a call and informs the wireless access network device of the supported EVRC and EVRC-WB coding lists, and the wireless access network device carries the coding capability list (supporting EVRC and EVRC-WB) supported by both the terminal and the wireless access network device For MSCe and GMSCe, GMSCe is routed to 3GPP's GMSCe'.

[0089] 3GPP's GMSCe' establishes a signaling route with 3GPP MSCe' based on the HLR addressing result, and GMSCe' and MSCe', 3GPP wireless access network equipment, and terminal B conduct code negotiation, and select the same code type, giving priority to wideband voice The principle of encoding, if AMR encoding is selected in the 3GPP system, GMSCe' will ret...

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Abstract

The invention discloses a method and a device for interworking and converting TFO and TrFO between different systems. The calling party initiates a call and reports the voice coding support capability of the calling terminal; the service request signaling is sent from the first system to the GMSCe of the second system; the GMSCe of the second system and the MSCe of the second system negotiate voice coding through out-of-band signaling; Negotiate whether to use wideband voice coding, if so, the GMSCe of the second system requires the GMGW of the second system to allocate eTC, complete the signaling connection, and conduct user plane TFO negotiation with the first system; negotiate whether to use wideband voice coding, if yes, enter Wideband voice calls. The present invention avoids wideband voice code conversion into G.711 transmission, and obtains wideband voice effect.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and a device for TFO and TrFO interworking conversion between different systems. Background technique [0002] At present, mobile networks mainly use traditional narrowband speech coding technology to carry voice services, and the more common ones are: [0003] 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) GSM / WCDMA network: AMR; [0004] 3GPP2 (Third Generation Partnership Project 2) CDMA network: EVRC, EVRC-B. [0005] The above-mentioned speech coding technologies all sample the speech signals of 300Hz to 3400Hz, and the sampling frequency is 8000Hz to form a 64Kbps PCM signal (G.711), and then perform compression coding on this basis to form the above-mentioned speech coding commonly used in mobile networks. technology, called Narrowband Speech. After the compressed voice signal is transmitted from the terminal to the v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/16
Inventor 李文苡杜刚王庆扬曹磊赵晔
Owner CHINA TELECOM CORP LTD
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