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Context repositioning method

A context and relocation technology, applied in the field of RFC 3095 header compression, can solve the problems of packet data loss, compressed header packets cannot be decompressed correctly, etc.

Inactive Publication Date: 2009-04-08
LG ELECTRONICS INC
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Problems solved by technology

[0052] In the above-mentioned conventional context relocation method, context update occurs because of data retransmission from RLC or context update packet data transmission during SRNS relocation, and thus synchronization between contexts of UE and target RNC occurs during SRNS relocation won't last
[0053] Moreover, according to the conventional context relocation method, the compressed header packets cannot be decompressed correctly until the compressor context and the decompressor context of the UE and the target RNC are synchronized, and thus continuously generate packet data loss

Method used

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Embodiment Construction

[0069] Detailed Description of Preferred Embodiments

[0070] Preferred embodiments of the present invention will now be described in detail, examples of which are illustrated in the accompanying drawings.

[0071] The context relocation method of the present invention is capable of controlling the context between a target radio network controller (RNC) which becomes an SRNC after seamless SRNS relocation (SSR) and a user equipment (UE) to be synchronized by transmitting information, The transmitted information enables the synchronization of the target RNC and UE's compressor context and decompressor context from the source or target RNC to the UE during SSR. At this time, the information maintaining the robust header compression (ROHC) synchronization is the sequence number (SN) of the real-time transport protocol (RTP).

[0072] RTP is a communication protocol for transmitting / receiving voice or conducting a real-time telephone call, and can be performed between UEs without...

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Abstract

A context relocation method used for header compression when seamless SRNS relocation is performed in an asynchronous IMT-2000 system transmits respective SN field values of compressor context and decompressor context together with SSR information from a source RNC or a target RNC to a UE when an SRNC, which manages dedicated radio resource assigned to a user equipment, performs SSR, and therefore, transmission efficiency can be improved as well as the UE and the target RNC which became the SRNC after SSR can be synchronized with the contexts of each other after the relocation..

Description

field of invention [0001] The invention relates to a context relocation method used in a header compression method, in particular to a context relocation method used for RFC 3095 header compression when seamless SRNS is relocated in an asynchronous IMT-2000 system. Background technique [0002] The Unified Mobile Telecommunications System (UMTS) is a third-generation mobile communication system evolved from the Global System for Mobile Communications (GSM) standard. This standard is a European standard dedicated to providing better mobile communication services on the basis of GSM core network and Wideband Code Division Multiple Access (W-CDMA) technology. In December 1998, ETSI in Europe, ARIB / TTC in Japan, T1 in the United States, and TTA in Korea formed a Third Generation Partnership Project (3GPP) in order to create specifications for standardizing UMTS. [0003] The UMTS standardization work by 3GPP has resulted in five Technical Specification Groups (TSGs), each dedic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/10H04W36/12H04L29/06H04L29/10H04L1/16H04L1/18H04W28/06H04W36/00H04W36/18H04W36/38H04W76/02H04W88/18
CPCH04W36/10H04L69/16H04L29/06095H04L1/18H04L29/0653H04L69/04H04L69/22H04W28/06H04W36/18H04L1/16H04W36/12H04L29/06149H04L69/168H04L29/06102H04L69/161H04L29/0604
Inventor 李承俊吕运荣李昭暎
Owner LG ELECTRONICS INC
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