Satellite mobile communication system based on partial satellite baseband switching

Abstract

The invention discloses a satellite mobile communication system based on partial satellite baseband switching, which belongs to the technical field of satellite communication. The satellite mobile communication system comprises a communication network body branch and a satellite switching management control branch which are discrete and parallel. A management control signal of satellite switchingprocessing is produced and transmitted by the satellite switching management control branch. A satellite processor in the system has the complete function of satellite transparent forwarding between a user link and a feeding link and also supports partial communication business for realizing satellite single-hop connection in the mode of bridging a bypass. A communication interface, a protocol specification and a processing course of the prior ground mobile communication system are not corrected basically; the prior scheme of the ground user terminal can be directly adopted by a satellite user terminal without considering double-module / multiple-module terminal design requirements; and simultaneously, the satellite mobile communication system is convenient for the further upgrade of a communication network body of the satellite system along with the development of the network technique of the ground mobile communication system.

Description

technical field [0001] The invention relates to satellite mobile communication, in particular to a satellite mobile communication system based on partial onboard baseband switching, and belongs to the technical field of satellite communication. Background technique [0002] Satellite mobile communication is the use of satellites and ground equipment to realize communication between land, sea and air space mobile users, as well as between mobile users and ground network users or between private network users. Satellite mobile communication services can provide communication services that are not restricted by geographical environment and climatic conditions. It complements and extends with the terrestrial cellular system and the terrestrial fixed communication network, and is an important means of communication to achieve seamless nationwide coverage. [0003] my country has a vast territory and complex terrain environment. In the western region, remote mountainous areas, oc...

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Problems solved by technology

This not only increases the complexity of system design modification (including interface, protocol, and even processing flow, etc.), but also has a certain impact on the stability of the communication system, and will also cause inconvenience to further system upgrades.

[0018] All in all, for a satellite mobile communication system based on the WCDMA communication system and considering the single-hop voice communication method, on the one hand, if the on-board baseband switching process is to be fully realized, there are certain difficulties in the current satellite payload capacity. Consider the implementation of some on-board baseband switching capabilities; on the other hand, if the corresponding existing communication protocol interfaces are modified with reference to the S-UMTS network structure model, it will not only complicate the communication interfaces, protocols, and processing procedures of the system, but basically cannot be directly adopted. The existing terrestrial mobile communication system has mature equipment, and satellite user terminals may also consider dual-mode / multi-mode design and implementation due to the need to adapt to new interfaces, which will bring new system design difficulties

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