A PTN-based self-adaptive service clock recovery method and system
A clock recovery and adaptive technology, applied in the field of mobile communication, can solve the problems of clock frequency jitter, network performance degradation, poor clock jitter filtering effect, etc., to reduce jitter and improve clock accuracy.
Active Publication Date: 2011-12-28
ZTE CORP
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Problems solved by technology
However, since the service data packets will inevitably be subject to a certain degree of signal interference during the packet transmission process, the direct recovery of the service clock at the PTN service outlet will obviously cause clock frequency jitter and drift, so it is necessary to take de-jitter measures to make the service clock reach a certain accuracy Index, as far as possible to obtain a service clock that is completely synchronized with the source clock to ensure the transmission capacity of the network
[0005] In the existing PTN data transmission technology, some algorithms are usually used to realize the adaptive clock recovery technology, that is, software with clock debounce function is configured in the adaptive clock recovery module 20. In addition to the poor effect, the processed service clock is still difficult to meet the specified clock index, which leads to the decline of network performance
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[0021] The present invention provides a technical solution for improving the clock accuracy index of the PTN service outlet through an external debounce circuit, so that the PTN service outlet recovers a service clock that tends to be synchronized with the source clock of the PTN service entrance, and uses the service clock to control the service to send. Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] Such as figure 1 It is a flow chart of a specific embodiment of the PTN-based adaptive service clock recovery method of the present invention, including the following steps:
[0023] Step S100: Preparation for powering on the system, including loading and configuring the external debounce circuit of the PTN service egress to make it work normally.
[0024] Step S101: The PTN service entrance encapsulates the services to be transmitted into service data packets, and prepares to transmit them...
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The invention discloses a method and a system for recovering a self-adapted service clock based on PTN. The method comprises the following steps: a PTN service inlet sends a service data packet by using a source clock so that the service data packet is transmitted to a PTN service outlet through a packet transport network; the PTN service outlet receives the service data packet; the PTN service outlet recovers the service clock from the service data packet by using a reference clock as a working clock; and the PTN service outlet analyzes the service data packet into corresponding service and transmits the corresponding service by using the service clock. The method and the system for recovering the self-adapted service clock based on the PTN effectively reduce the shake of the service clock and obviously enhance the network property of the PTN network.
Description
technical field [0001] The invention relates to the field of mobile communication, in particular to a PTN (PackageTransport Network: Packet Transport Network)-based adaptive service clock recovery method and system thereof. Background technique [0002] PTN supports a variety of bidirectional point-to-point connection channels based on packet switching services, and has end-to-end networking capabilities suitable for various coarse-grained services. It is a carrier-class Ethernet service that is compatible with traditional TDM (Time Division Multiplexing: time division Multiplexing), ATM (Asynchronous Transfer Mode: asynchronous transfer mode), ML-PPP (Multi Link Point to Point Protocol: multi-link PPP protocol) and other services integrated transport network technology. PTN equipment refers to a new generation of optical transmission equipment oriented to packet transmission. PTN equipment can provide efficient transmission of packet services. [0003] When the service dat...
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IPC IPC(8): H04L7/033H04L12/56H04L12/70
Inventor 许海东
Owner ZTE CORP