Mobile terminal apparatus including net radio service in a mobile satellite service communication system
First Claim
1. A mobile terminal apparatus having a transceiver with a user interface, and an antenna for both radiating and collecting RF signals to and from a satellite, the transceiver comprising:
- an RF section coupled to the antenna and a processor board coupled to the RF section and the user interface;
said processor board including,digital signal processor means for implementing a demodulator function, a modulator function, a receive framing function coupled to the demodulator, a transmit framing function coupled to the modulator, and a coding function and decoding function coupled to the transmit and receive framing functions, respectively;
digital control processor means coupled to the signal processor means for controlling the functions implemented thereby;
wherein said digital signal processor means includes means for operating in a voice mode, facsimile and data modes, signaling and packet switch modes, and a net radio mode including a normal mode, a private mode and a priority 1 mode; and
wherein the priority 1 mode includes a sequential search of a net radio database for an available net channel of a plurality of net channels designated for net radio services, thereby increasing the probability of a successful priority 1 call request.
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Accused Products
Abstract
A mobile terminal for satellite communication of voice data, facsimile and computer information, which consists of an RF transceiver section, and a processor board. The processor board has two digital signal processors and a multi-task control processor for controlling the operation of the two signal processors. Net radio service is implemented in the mobile terminal and includes a priority 1 mode wherein a channel search is performed on a net radio channel database for an available channel if any problem is initially encountered in obtaining control of a specific communication channel such as a channel currently in use or a channel designated for use as a default channel.
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Citations
14 Claims
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1. A mobile terminal apparatus having a transceiver with a user interface, and an antenna for both radiating and collecting RF signals to and from a satellite, the transceiver comprising:
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an RF section coupled to the antenna and a processor board coupled to the RF section and the user interface; said processor board including, digital signal processor means for implementing a demodulator function, a modulator function, a receive framing function coupled to the demodulator, a transmit framing function coupled to the modulator, and a coding function and decoding function coupled to the transmit and receive framing functions, respectively; digital control processor means coupled to the signal processor means for controlling the functions implemented thereby; wherein said digital signal processor means includes means for operating in a voice mode, facsimile and data modes, signaling and packet switch modes, and a net radio mode including a normal mode, a private mode and a priority 1 mode; and wherein the priority 1 mode includes a sequential search of a net radio database for an available net channel of a plurality of net channels designated for net radio services, thereby increasing the probability of a successful priority 1 call request. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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2. The apparatus of claim 2 wherein said search for an available channel is made following an unsuccessful attempt to use a designated default net channel.
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12. A method of making a priority 1 net radio service mode call in a mobile terminal of a mobile satellite service system and overriding any previously established net radio talker in order to obtain control of a specific communication channel or to initially set up a call where a desired net channel is available or not currently active, comprising the steps of:
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formatting and transmitting a signalling unit message request in signal processing means of the mobile terminal for a priority 1 net radio call; determining a net channel for placing said priority 1 call in accordance with a predetermined net channel assignment procedure including a step of searching for an available net channel in a net channel data base including a plurality of radio service net channels for increasing the probability of a successful priority 1 call; receiving a priority 1 net channel assignment; tuning to the assigned net channel; and activating means for transmitting a voice communication signal to the system. - View Dependent Claims (13, 14)
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Specification