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Real-time protocol text transmission method in wineless communication system

A technology of wireless communication system and real-time protocol, applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve the problems of transmission delay and delay jitter increase, so as to improve reliability, overcome transmission delay and time delay The effect of increased delay jitter and reduced bandwidth waste

Active Publication Date: 2009-08-05
XFUSION DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] In view of this, the main purpose of the present invention is to provide a method for transmitting RTP messages in a wireless communication system, to overcome the transmission delay and time delay caused by the transmission of compressed messages and uncompressed / semi-compressed messages on the UU interface. Problems such as increased delay and jitter

Method used

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  • Real-time protocol text transmission method in wineless communication system
  • Real-time protocol text transmission method in wineless communication system
  • Real-time protocol text transmission method in wineless communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] image 3 Shown is the structure of UU interface transmission RTP message in this embodiment, wherein DCH transmission channel is only used for transmitting RTP compressed message, and RTP uncompressed / semi-compressed message is sent with HS-DSCH transmission channel, specifically The implementation methods can be as follows:

[0053] (1) Design the TFCS parameters of the DCH channel in advance according to the RTP compressed message, for example, set the TB Size to the RTP compressed message size, etc., so as to specially send the RTP compressed message; set a set of TFCS parameters on the HS-DSCH channel , since all data delivered to the HS-DSCH channel must first be processed by the MAC layer, and the size of each data must conform to the protocol data unit size (PDU Size) of the MAC layer, so the PDU Size is set according to the RTP uncompressed / Semi-compressed messages are designed to meet the transmission requirements of uncompressed / semi-compressed messages. Ba...

Embodiment 2

[0071] Figure 4 Shown is the structure of the RTP message transmitted by the UU interface in this embodiment. First, the primary DCH channel is mapped to the DPCH channel using the PSC for transmitting RTP compressed packets; the secondary DCH channel is mapped to the DPCH channel using the SSC for transmitting RTP uncompressed / semi-compressed packets. Then, the PSC and the SSC are interleaved in the cell to send the RTP compressed message and the RTP uncompressed / semi-compressed message to the UE respectively. At this time, RTP uncompressed / semi-compressed packets are sent only using the DPCH channel corresponding to the SSC.

[0072] Since the PSC and the SSC are used interleavedly in the cell and will not be used at the same time, this method does not need to receive two scrambling codes at the same time, which can reduce the decoding complexity of the UE.

Embodiment 3

[0074] In this embodiment, the method for splitting the RTP compressed message and the RTP uncompressed / semi-compressed message at the UU interface is specifically: distinguishing the RTP compressed message and the RTP uncompressed / semi-compressed message at the PDCP layer according to the header information, Distribute RTP compressed packets to the first DTCH logical channel, and distribute RTP uncompressed / semi-compressed packets to the second DTCH logical channel. For details, see Figure 5 .

[0075]The first DTCH logical channel sends the RTP compressed message to the DCH channel for transmission through the MAC layer, and the subsequent process is the same as that in Embodiment 1, and will not be repeated here.

[0076] The second DTCH logical channel sends the RTP uncompressed / semi-compressed message to the HS-DSCH channel for transmission through the MAC layer, and the subsequent process is also the same as that in Embodiment 1, which will not be repeated here.

[007...

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Abstract

The method includes procedures: after being sent to general land wireless access system, RTP messages are divided to RTP compression message and other RTP messages except RTP compression message based on compression condition; through different transmission channels, the method sends RTP compression message and other RTP messages to user device. When transferring RTP message through UU interface of wireless communication system, the method maps compression message and other RTP messages to different transmission channels to send respectively so as to overcome issues of time delay of RTP message on UU interface, and wasting of resources. The invention raises transmission quality of real time service in wireless communication system.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method for transmitting RTP messages in a wireless communication system. Background technique [0002] At present, IP technology is widely used in wireless communication fields such as 3G systems, such as WCDMA systems and TD-SCDMA systems. In IP communication, real-time service packets, such as packet voice (VoIP), etc., are transmitted through a real-time protocol (RTP, Real Time Protocol). The RTP message is based on the bearer provided by the User Datagram Protocol / Internet Protocol (UDP / IP). Each message header occupies 40 or 60 bytes, of which the IPv4 header has 40 bytes, and the IPv6 has 40 bytes. 60. figure 1 It shows the detailed format of the RTP message. The IP header occupies 20 / 40 bytes, the UDP header occupies 8 bytes, and the RTP header occupies 12 bytes. The number of bytes occupied by the payload of the service is relatively Smaller, for example, the pay...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/56
Inventor 庄宏成
Owner XFUSION DIGITAL TECH CO LTD