Method for grouping voice data packet transmission and its system

Abstract

The invention discloses a transmission method and system of group speech data package, in order to increase the transmission efficiency of VoIP service. The sending end generates CRC verifying field based on one of IP packet header, UDP packet header, RTP packet header, CMR, ToC, and a substream of VoIP data package to be sent or any combination. The said verifying field is added to the said data package to be sent. The receiving end verifies only partial content of the data package, therefore the number of retransmission due to verity error is greatly reduced. For the voice coded by AMR, the length of CRC verifying field is contracted to 12 bits, under the precondition of satisfying the transmission demand, the required resource for transmitting the verifying field is reduced and the system capacity is furthermore increased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to packet voice technology. Background technique [0002] VoIP (Voice over Internet Protocol) is a technology based on Internet Protocol (Internet Protocol, referred to as "IP") telephony and launching corresponding value-added services. The biggest advantage of VoIP is that it can widely adopt the environment of Internet and global IP interconnection, and provide more and better services than traditional services. VoIP can cheaply transmit voice, fax, video, and data services on IP networks, such as unified messaging, virtual phone, virtual voice / fax mailbox, directory service, Internet call center, Internet call management, video conference, e-commerce , Fax storage and forwarding and storage and forwarding of various information, etc. IP telephony is a voice service provided by VoIP technology. [0003] Traditionally, voice is transmitted through a circuit domain, and a t...

AI Technical Summary

Problems solved by technology

[0013] (1) Establishing multiple RBs will bring more resource requirements and burden the system

[0014] (2) Some implementations of High Speed ​​Packet Access (HSPA for short) channels may not support multiple RB bearers, therefore, they may not be able to be carried in the mainstream bearer HSPA channels of VoIP services in the future

[0019] (1) There is no distinction between different sub-flows of AMR, so different sub-flows cannot be protected by different CRCs

[0020] (2) For VoIP services, the 24-bit CRC is a bit wasteful, because the circuit switched domain (Circuit Switched Domain, referred to as "CS") voice service uses 12-bit CRC, bit error rate (Bit Error Rate, referred to as "BER") is already below 10 -6 up

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