PDCP layer hyperframe number synchronization method and device

Abstract

The invention relates to a PDCP layer superframe number synchronization method. The method comprises steps of according to transmitted data packet quantity and step out time during peak rate, determining an estimation dynamic value of a receiving end HFN value; according to a recorded HFN value and an estimation dynamic value of the synchronization of the last time of the PDCP layer, generating target quantity of ICMP reports, wherein a sequence number of each ICMP repot is the maximum value; according to the sequence from larger to small of the HFN values of the ICMP reports, sending the target quantity of ICMP reports to a target terminal; receiving responding reports fed back by the target terminal; and according to the recorded HFN value, the estimation dynamic value, the responding reports and the corresponding ICMP reports, determining a target HFN value of the target terminal at the current moment and storing the target HFN value to be a synchronization HFN value. The inventionalso provides a base station. When the HFN of the base station is smaller than the HFN of the target terminal, by sending ICMP reports to the target terminal, based on the responding reports, the current target HFN value of the target terminal is determined, and is stored to be the synchronization HFN value, so the HFN synchronization of the target terminal is restored and synchronization efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method and a device for synchronizing a PDCP layer superframe number. Background technique [0002] With the rapid development of communication technology, the communication network covers a wide range. The base station is an important infrastructure of the communication network. Under normal circumstances, the HFN (Hyper Frame Number) state of the PDCP (Packet Data Convergence Protocol, Packet Convergence Protocol) layer maintained by the base station will not lag behind the terminal. However, in some abnormal cases, such as the HA (High Available, high availability cluster) function to improve the reliability of communication equipment, the HFN status of the PDCP layer maintained by the base station will lag behind that of the terminal. Since the HFN and SN (Packet Data Convergence Protocol Serial Number, serial number) of the PDCP layer are related to the encryption a...

AI Technical Summary

Problems solved by technology

In the process of realizing the present invention, the inventor found that there are at least the following problems in the traditional synchronization technology: after the HFN of the PDCP layer of the relevant base station is out of synchronization, the traditional synchronization recovery method is to use different schemes for the HFN of the PDCP layer out of synchronization for different scenarios. to sync

However, there is still the problem of low synchronization efficiency for the out-of-synchronization of the short serial number mode

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