Implementation method of satellite cluster terminal protocol stack

Abstract

The present invention proposes a satellite cluster terminal protocol stack implementation method, including a point-to-point single call conventional protocol stack and a point-to-multipoint group call cluster protocol stack; when the mobile terminal is idle, it is ready to enter one of the two protocol stacks at any time, The two protocol stacks use the same physical layer, and the protocol stack is separated from the media access control sublayer (MAC); wherein: the physical layer separates the cluster control signaling from the conventional control signaling and submits them to different protocol stacks; the mobile terminal After entering the call state of the trunking mode, the regular call mode is normally suspended; the high-level application program separates the regular business from the trunking business, and exchanges control information with the protocol stacks of the two call modes at the same time. The invention aims at maintaining two protocol stacks on the TDMA channel from the geostationary orbit satellite to the ground mobile terminal, one for conventional single call and the other for cluster group call.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a satellite terminal cluster protocol stack implementation method under the condition of geostationary orbit satellite long-delay TDMA channel, especially a satellite terminal supporting point-to-point single-call duplex voice call. , by supplementing the trunking protocol and signaling process, a point-to-multipoint satellite trunking half-duplex group call service is obtained, and a trunking terminal protocol stack implementation method that ensures the simultaneous coexistence of single calls and group calls. Background technique [0002] The satellite mobile communication system refers to a system that uses the relay forwarding or switching function of the earth orbit satellite to connect the mobile terminal (station) in its coverage area to the core network of the ground gateway station (system) for business exchange to realize mobile communication...

AI Technical Summary

Problems solved by technology

In this way, a trunk group call will overuse the air interface resources, the call connection time will be infinitely extended, and it is difficult to complete the group call

[0026] 2) figure 2 In Steps 18, 27, and 29, the called party needs to answer, but under the trunking group call condition, the called party is not a single user but many users, and the called party’s answering function cannot be realized

[0027] 3) Whether it is the calling user or the called user, it is necessary to establish a connection between the user and the gateway station controller for signaling interaction, but the cluster group user cannot establish an independent connection to each user, and can only use broadcast wireless Sending signaling in connection mode

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