Method and equipment for processing context identifier (CID) of robust header compression (ROHC)

Abstract

The embodiment of the invention relates to a method and equipment for processing a context identifier (CID) of robust header compression (ROHC). The method comprises the following steps of: receiving a first data stream; judging whether the CID number of the first data stream exists in a register bank; if the CID number of the first data stream exists in the register bank, sequentially shifting and registering the CID numbers of data streams which are received after a second data stream is received in the register bank to the historical direction to vacate a register which is preset in the register bank and used for storing the CID numbers of latest data streams, wherein the second data stream is the data stream which is registered in the register bank, and the CID numbers of the second data stream and the first data stream are the same; and registering the CID number of the first data stream in the register which is preset in the register bank and used for storing the CID numbers of the latest data streams. According to the embodiment of the invention, the CID can be stored and reliably updated by using few buffer resources. Meanwhile, the updating process of the CID is simple, and few resources are consumed.

Description

technical field [0001] Embodiments of the present invention relate to the field of wireless communication, and more specifically, relate to a processing method and device for context identification of robust header compression. Background technique [0002] Robust Header Compression (Robust Header Compression, referred to as ROHC) provides a compressed Internet Protocol (Internet Protocol, referred to as IP) / User Datagram Protocol (User Datagram Protocol, referred to as UDP) / Real-time Transport Protocol (Real-time Transport Protocol) , referred to as RTP) packet method, which can compress an IP / UDP / RTP packet to about one byte under extremely poor channel conditions. ROHC improves the performance of carrying IP streams on wireless networks, and is widely used in wireless networks and mobile IP phones to reduce packet header overhead, packet loss rate, and improve interactive response performance. [0003] Context (Context) is an important content in ROHC. The context s...

AI Technical Summary

Problems solved by technology

With this scheme, when the time counter overflows, it is impossible to accurately judge the time of the CID, which leads to an error in the update of the CID

In addition, when a new flow arrives, the CID of the new flow needs to be compared with the arrival time of the CID of the flow that has previously arrived, which is time-consuming

In addition, when the number of users supported by the wireless network increases, the resources consumed to update the CID will increase.

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