Wireless packet data distributed communications system
First Claim
1. A method of establishing packet data communication between a central station and a plurality of remote units via multiple beam satellite, comprising transmitting packets over a TMD forward link to said remote units, transmitting packets from said remote units back to the control station over a slotted CMDA return link, and switching beams to increase efficiency of satellite usage.
1 Assignment
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Accused Products
Abstract
A two-way satellite communications system includes an Earth station communicating with a plurality of remote terminals using a network access protocol that facilitates low power consumption by the terminals. The earth station generates forward link TDM packet data transmissions on one or more satellite channels, and detects, despreads and decodes multiple concurrent return link slotted CDMA packet transmissions on one or more satellite channels. It communicates through a wired connection with a packet processing center which ultimately both delivers return link packet data to end-customers and receives forward link packet data from end-customers. The remote terminals receive, process and act upon forward link TDM transmissions on one or more satellite channels, and generate slotted spread spectrum CDMA transmissions on the return link on one or more satellite channels. The remote terminals communicate with a local digital data source and/or sink, digitize one or more local analog sensor signals, enter into a sleep mode to minimize the terminal'"'"'s power consumption, and access the satellite communications network in accordance with the system network access protocol.
108 Citations
3 Claims
- 1. A method of establishing packet data communication between a central station and a plurality of remote units via multiple beam satellite, comprising transmitting packets over a TMD forward link to said remote units, transmitting packets from said remote units back to the control station over a slotted CMDA return link, and switching beams to increase efficiency of satellite usage.
Specification