Method, system and tfo conversion device for realizing voice intercommunication between different systems

Abstract

The disclosure relates to a method, a system and a TFO conversion device for realizing voice communication between different systems in a TFO manner. The method includes receiving a TFO negotiation message; converting the TFO negotiation message according to the format requirements of the receiving party; if the message contains voice coding capability, converting it to the receiving party in the case that the voice coding capability supports wideband voice coding type For the supported encoding type, forward the TFO negotiation message for format and encoding type conversion to the receiver; if it does not include voice encoding capability, forward the TFO negotiation message for format conversion to the receiver; Voice data is coded and converted, and the control information and synchronization information in the TFO frame are converted, and the converted voice data, control information and synchronization information are used to form the TFO frame format required by the receiver and forwarded to the receiver. The present disclosure can realize voice intercommunication between different systems.

Description

technical field [0001] The present disclosure relates to the technical field of mobile communication, and in particular, relates to a method, a system and a TFO conversion device for realizing voice intercommunication between different systems in a TFO (Tandem FreeOperation, vocoder cascade-free operation) manner. Background technique [0002] At present, mobile networks mainly use traditional voice coding technology to carry voice services. There are many types of traditional voice coding technology, and the more common ones are: [0003] GSM (Global System for Mobile communications, Global System for Mobile Communications) / WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access) network: AMR (Adaptive MultiRate, adaptive multi-rate); [0004] CDMA (Code Division Multiple Access) network: EVRC-A (Enhanced Variable Rate Codec A, Enhanced Variable Rate Codec A) and EVRC-B (Enhanced Variable RateCodec B, Enhanced Variable Rate Codec B, ), where E...

AI Technical Summary

Problems solved by technology

[0012] However, broadband voice applications put forward new requirements for the network. Since the sampling frequency is doubled compared with that of traditional voice, and the quantization method remains the same, the bandwidth occupied by PCM of the original signal will also be doubled, and the rate will reach 128Kbps , cannot be transferred and exchanged in the network. Therefore, the application of broadband voice does not allow a vocoder on the network side to decode the compressed voice signal into PCM and transmit and transfer it.

[0013] Therefore, the application of broadband voice must adopt the method of TFO or TrFO, and the network side will no longer perform voice decoding and encoding, but these two methods can only be applied within the system. When inter-system intercommunication, such as 3GPP system and 3GPP2 system Since both users cannot use the same encoding method, and the vocoder codes in the negotiation signaling defined in the agreement between the two systems are also incompatible, the current TFO and TrFO methods cannot support broadband voice services between systems intercommunication

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