Patent ID: 11881928
Assignee: THALES
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A dual-mode or multi-mode telecommunications terminal comprising:
a first radiofrequency (RF) circuit, including an antenna and multi-band RF components,
a second digital circuit of application-specific integrated circuit type or field-programmable gate array type (ASIC/FPGA type) for processing a physical layer of a multiple radio access, and
a third digital circuit of microcontroller and digital signal processor for processing a physical layer and higher layers of terrestrial mobile networks,
the terminal being wherein the first, second and three circuits are configured to:
emit at a given instant T on a random uplink UL data channel at a predetermined frequency to the access module said one or more bursts of data, including an identifier and information regarding the geographical location of said terminal;
perform the acquisition of a carrier of a downlink DL data channel according to a carrier frequency identifier which was transmitted to the terminal by the access module and start listening for possible bursts transmitted on this DL carrier which are possibly intended for it;
dispatch to the central access module on the random uplink UL communication channel said one or more bursts of data as well as information relating to the location of said terminal at a new instant T+1 wherein
the first radiofrequency circuit and the two digital circuits are configured to allow software configuration of RF parameters and of an access and connection protocol which are specific to the space mobile network, the software configuration being carried out by the implementation of all or some of a set of software modules comprising:
a software module for selecting the cellular or mixed, satellite mode of operation, this module being based on a mechanism for detecting the availability of the services and resources of a terrestrial cellular system and/or of a satellite mobile system and in general favoring the use of a terrestrial cellular system;
a software module for parametrizing the software configuration of RF parameters and of an access and connection protocol which are specific to the space mobile network according to operation in the bands allocated to the space mobile service;
a software module for selecting the bandwidth or the number of emission/reception carriers which is suited to the satellite channel;
a module for implementing the method of claim 1, in particular on the up-path with the selection of the timeouts and of the mode of transmission as a function of the type of information to be transmitted and which is suited to the satellite-based communication channel;
a module for implementing a specific power control algorithm suited to the satellite-based communication channel;
a module for implementing a specific Doppler compensation mechanism suited to the satellite-based communication channel.