An Adaptive Method to Realize 1588 Time Synchronization in Unicast Mode

Abstract

Disclosed is a self-adaptive method for realizing 1588 time synchronization in a unicast mode. The method comprises: during the stage of establishing a master-slave relationship, in an event processing method of each clock network element, increasing an actively sent notification message based on the established master-slave relationship in a negotiated unicast mode; during the stage of calculating a deviation and performing adjustment, in an event processing method of a master clock network element, increasing an actively sent synchronous message and an actively sent delay request response message based on a master clock event processing method in the negotiated unicast mode; and in an event processing method of a slave clock network element, increasing an actively sent delay request message based on a slave clock event processing method in the negotiated unicast mode. According to the present invention, the negotiated unicast mode is improved; therefore, when performing 1588 time synchronization in the unicast mode, the network elements in the present invention do not need to appoint a unicast intercommunication mode with opposite sides in advance, thereby ensuring intercommunication in any unicast mode.

Description

technical field [0001] The invention relates to 1588 time synchronization, in particular to an adaptive method for realizing 1588 time synchronization in unicast mode. Background technique [0002] 1588 time synchronization technology is used to achieve time synchronization between network elements, and is widely used in mobile backhaul scenarios to ensure normal communication between 4G base stations. The technical details are specified in the IEEE1588-2008 standard, mainly including the establishment of network elements The two steps are the master-slave relationship between network elements (the master-slave relationship between network elements is determined by comparing the clock quality parameters carried in the notification message) and calculating the time deviation and adjusting the time. The IEEE1588-2008 standard discusses the 1588 time synchronization technology mainly based on the multicast model, and the realization of time synchronization through the unicast m...

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Problems solved by technology

[0035] In the above two modes of implementing 1588 time synchronization through the unicast model, there is such a problem: only when the configured unicast mode (negotiated unicast mode or forced unicast mode) is the same, the network elements can communicate with each other, if One side is negotiated unicast mode, and the other side is forced unicast mode, so there will be problems in intercommunication, such as Figure 5 As shown, among them, NE 1 is configured as negotiated unicast mode, and NE 2 is configured as mandatory unicast mode, so that only NE 2 has the opportunity to send notification packets to NE 1. For NE 1, due to NE 2 Unicast request packets will not be sent, so NE 1 will not actively send notification packets to NE 2, then when the clock quality of NE 1 is higher than that of NE 2, NE 2 cannot learn the clock quality of NE 1 Clock quality information, resulting in failure to establish the master-slave relationship, and NE 2 cannot achieve 1588 time synchronization with NE 1

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