Method for realizing inter-system voice communication, system and TFO conversion device

Abstract

The invention relates to a method for realizing the inter-system voice communication through a TFO means, a system and a TFO conversion device. The method comprises steps of receiving TFO negotiation information, performing conversion according to a receiver's requirement of the format of the TFO negotiation information, if the information comprises a speech encoding capability, converting the TFO negotiation information format to an encoding type supported by the receiver under a condition that the speech coding capability supports the broadband speech encoding type, if the information doesn't comprise the speech encoding capability, forwarding the TFO negotiation information which is going through the format conversion to the receiver, receiving the TFO frame, performing code conversion on voice data in the TFO frame and performing conversion on the control information and synchronization information in the frame, forming the TFO frame format required by the receiving through utilizing the converted voice data, control information and synchronization and forwarding the control information and the synchronization information to the receiver. The invention can openly realize the inter-system voice communication.

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 Free Operation, 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 Multi Rate, 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 Rate Codec B, Enhanced Variable Rate Codec B, Decodin...

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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