Encrypted communication method for LTE (Long Term Evolution) bearing narrowband voice coding

Abstract

The invention discloses an encryption communication method and system for LTE bearing narrowband voice coding. The method comprises the steps: a terminal notifies a network side of the end-to-end encryption support capability information of the narrowband voice coding communication of the terminal in advance; the end-to-end encryption support capability information is used for indicating whether the terminal supports end-to-end encryption or not and a supported encryption mode, and the encryption mode comprises an encryption mode of migrating information bits and an encryption mode of not migrating information bits; when an end-to-end encryption communication service needs to be carried out, the network side determines an encryption mode adopted by the end-to-end encryption communication service according to the type of the end-to-end encryption communication service and the end-to-end encryption support capability information of the terminal related to the service; and the determined encryption mode is triggered and adopted to carry out the end-to-end encryption communication service. By applying the technical scheme disclosed by the invention, the QoS quality of the voice can be effectively improved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to an encrypted communication method for carrying narrowband voice coding over LTE. Background technique [0002] With the continuous development of wireless communication technology, trunking communication technology has developed from analog system to narrowband digital trunking system. At the same time, with the increasing demand for wireless broadband from industry users, it has developed from simple voice services to 3GPP based on LTE technology. MCPTT, B-TrunC digital trunking communication system. [0003] Narrowband digital trunking (PDT) adopts narrowband voice coding (NVOC), and TETRA adopts AMBE encoding format to support language. The LTE broadband trunking system in 3GPP eMBMS adopts VoIP technology to support voice services, and uses MBSFN IP multicast to support language clustering for the cluster, and also supports IP unicast voice. VoIP or AM...

AI Technical Summary

Problems solved by technology

In this encryption method, since the useful information bit of the voice frame needs to be diverted, the integrity of the voice data is destroyed, so that the voice data corresponding to the useful information bit is missing for the receiving end, that is, the receiving end cannot receive this part of the useful information. The voice data corresponding to the information bit, thus affecting the anti-error capability and QoS quality of the voice data

[0011] In the voice service scenario, the LTE trunking system can support the narrowband speech coding format and the end-to-end encrypted communication of the narrowband speech coding, and the air interface capability is not limited similarly to the narrowband system; the LTE terminal supports the end-to-end narrowband speech coding When encrypting, if the voice frame sequence number of the end-to-end encryption is also carried by embezzling the information bits of the voice frame, the QoS quality of the voice will still be reduced in the case of excess air interface resources

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