Method of performing header compression configuration in trunking services, system and core network subsystem

Abstract

The invention discloses a method of performing header compression configuration in trunking services, a system and a core network subsystem. The method comprises the following steps of receiving cluster channel header compression support capabilities reported by terminals after network connection is set up; judging whether all on-line terminals in a cluster group are supporting cluster channel header compression according to the terminal reports; if yes, then determining that the cluster channel header compression supporting capabilities of the cluster group are positive, otherwise, determining the cluster channel header compression supporting capabilities of the cluster group are negative; during a cluster group call establishing process, sending the cluster channel header compression supporting capabilities of the cluster group to a base station so as to start or stop header compression and send data down. By means of the technical scheme, header compression can be adopted as much as possible on the premise that all terminals in the cluster group receive downlink data. Therefore, the bandwidth utilization rate of an air interface is improved.

Description

technical field [0001] The invention relates to the cluster service technology, in particular to a method, a system and a core network subsystem for performing header compression configuration in the cluster service. Background technique [0002] In an IP-based wireless system, the overhead of the packet header is a non-negligible part of the overhead of the air interface; especially in the scenario of small voice packets such as VoIP, the payload of the voice is generally ten to twenty bytes. The overhead of IP and User Datagram Protocol (UDP, UserDatagramProtocol) header may account for about forty bytes, accounting for 2 / 3 of the entire data packet. In order to improve the bandwidth utilization of the air interface, header compression is generally adopted to reduce the size of the packet header. [0003] However, for IP-based cluster services, there is no guarantee that all terminals in the cluster group can support IP header compression. For the convenience of descript...

AI Technical Summary

Problems solved by technology

In the trunking system, in order to save the downlink resources of the air interface, the downlink data stream is mostly sent to the called terminal in the form of broadcast / multicast in the group call service. In some cases, there may be some low-capability terminals in the trunking group. At this time, if header compression is enabled for all terminals in the cluster group, the low-capability terminals among them will not be able to receive downlink data correctly

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