Packet switching network distributed adaptive dither buffer adjusting method

Abstract

Sampling filling level in local jitter buffer area in adjustment cycle of jitter buffer area, and processing the sampled sequence obtains predicted value for reflecting change trend of filling level in local jitter buffer area in the adjustment cycle. Further, considering change information of jitter buffer area feedback from data sending end synthetically obtains best estimation of state of local jitter buffer area, based on which, the optimal state is adjusted. Comparing with prior art, the invention adjusts a buffer area to an optimal are quicker since considering information in local jitter buffer area and in jitter buffer area at sending end. The invention speeds up convergence of adjustment procedure.

Description

(1) Technical field [0001] The invention relates to a distributed adaptive jitter buffer adjustment method of a packet switching network, in particular to a distributed adaptive jitter buffer adjustment method based on distributed jitter buffer measurement. (2) Background technology [0002] At present, the packet switching network has the advantages of cheap price, flexible protocol, good scalability, and mature technology, and has been widely used. Many real-time services, such as IP telephony, TDM (Time Division Multiplexing) circuit emulation services, etc. have been or will be tried to be transmitted on the packet switching network. The packet-switching network adopts asynchronous transmission mode, and most real-time services require end-to-end clock synchronization, requiring the clock at the receiving end to be consistent with the clock at the sending end. When the clocks of the receiving end and the sending end are not obtained from the same common clock synchroniz...

AI Technical Summary

Problems solved by technology

Since the maximum delay jitter introduced by packet switching networks is usually unpredictable, in order to absorb the maximum delay jitter and avoid jitter buffer overflow, the jitter buffer size and normal operating point must be set large enough, which may not only cause jitter buffer usage The waste on the network will generate a large queuing delay at the same time

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