Packet supplementing method and system for group communication

Abstract

The invention discloses a packet reissuing method and system for group communication, and the method comprises the steps: sending a message which is used for suggesting the establishment of a unicastbearer to a server when user equipment detects the loss of a data packet of the group communication, the unicast bearer being used for reissuing the lost data packet, and the message carrying corresponding data packet loss information; enabling the server to establish a unicast bearer for the user equipment according to the message; and enbaling the server to utilize the unicast bearer to retransmit a lost data packet indicated by the data packet loss information to the user equipment. By adopting the method and the device, the packet loss problem of group communication can be effectively solved, and the data integrity of the group communication is ensured.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a packet supplement method and system for group communication. Background technique [0002] The Mission Critical Service of the 3rd Generation Partnership Project (3GPP) includes Mission Critical Push To Talk (MCPTT) / Mission Critical Video / Mission Critical Data. At present, when group communication of these services is transmitted in a broadcast manner, retransmission of lost data packets is not supported. [0003] However, for certain services (such as data group communication) that have high requirements on data integrity, the above-mentioned existing group communication transmission solutions cannot meet this requirement. Since the above-mentioned existing solution adopts the broadcast mode and does not support retransmission of data packet loss, when a packet loss occurs at the receiving end, the network side cannot know the occurrence of the packet loss, nor can i...

AI Technical Summary

Problems solved by technology

[0006] In the broadcast bearer quality detection scheme in the above standard, the system can only maintain a certain receiving quality by rigidly switching between broadcast and unicast bearer modes, that is, when the MBMS bearer quality is not good, the system will eventually switch completely The unicast bearer mode is used to receive services, and the unicast bearer mode itself occupies a huge air interface resource and system capacity, and it has more restrictions on the specification and performance of the group than the broadcast mode.

Moreover, the above detection scheme still does not solve the problem of packet loss in the process of broadcast bearer mode

Therefore, the above technical broadcast bearer detection scheme cannot be applied to the existing group communication transmission scheme to solve the packet loss problem of group communication

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