User face protocol stack and head compression method

Abstract

The invention discloses a user interface protocol stack, applied to radio evoluted networkin two-layer node structure, comprising IP access gateway (IAGW) user interface protocol stack, edge radio station (ERS) user interface protocol stack and uer end (UE) user interface protocol stack, where the IAGW user interface protocol stack comprises: layer L1, layer L2, IP layer and higher layer; the ERS user interface protocol stack comprises equivalent layer L1, layer L2, IP layer and higher layer on E-I interface side between it and IAGW; the radio interface side comprises: radio layer L1, lower layer and head compression layer; the UE user interface protocol stack comprises equivalent radio layer L1, lower layer and head compression layer to those on ERS radio interface side. And the invention also discloses a head compressing method in the two-layer node structure, implementing head compression of air interface data packet between ERS and UE.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an evolution network user plane protocol stack with a two-layer node structure, and a data packet header compression method applied to the user plane protocol stack. Background technique [0002] The Universal Mobile Telecommunications System (UMTS) is a third-generation mobile communication system using the WCDMA air interface technology, and the UMTS system is usually also called a WCDMA communication system. The UMTS system adopts a structure similar to that of the second generation mobile communication system, including a radio access network (Radio Access Network, RAN) and a core network (CoreNetwork, CN). Among them, the wireless access network is used to handle all wireless-related functions, while the CN handles all voice calls and data connections in the UMTS system, and realizes switching and routing functions with external networks. The CN is logically divided in...

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Problems solved by technology

[0010] As can be seen from the above description, the function of header compression in the prior art is implemented in the RNC. Because there are many problems in the existing network, such as high time delay, low data rate, many nodes, and high investment costs, 3GPP's current LTE ( The Long Term Evolution) project is developing an architecture for evolving networks, thus resulting in candidate architectures for two-layer nodes and three-layer nodes as described above

At present, LTE has not proposed any details of the protocol architecture except for the framework architecture, and has not proposed any solution for the header compression method of the evolved architecture.

[0011] In addition, in the future network evolution architecture, the CS domain will disappear, only the PS domain will exist, and the voice will be carried by the PS domain in the form of VOIP (Voice over IP; Voice over IP), which means that the future access network There will be a large number of VOIP RTP packets between the core network, and the header bytes in the RTP packets account for more than 80%, so this will greatly waste the bandwidth, transmission efficiency and transmission delay of the backhaul (backhaul), so A complete solution for header compression needs to be rethought in new network architectures

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