Method and system for synchronizing a TDMA communication network

Details Method and system for synchronizing a TDMA communication network Method and system for synchronizing a TDMA communication network

1979-09-13

1981-04-14

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

455 12, H04J 306

Patent

active

042623561

ABSTRACT:
A method and a system are disclosed for synchronizing within a recurrent time frame the starting points of the transmissions from the various stations in a TDMA network wherein N stations distributed among M separate zones covered by M different down-link frequencies exchange pulse bursts through a satellite, each pulse burst being comprised of a preamble, a unique word, the transmitting station's address, and traffic data. The satellite includes a global beam antenna which covers all of the M zones and is adapted to receive M different up-link frequencies, means for converting these M up-link frequencies to M corresponding down-link frequencies, and M directional beam antennas covering the M zones, each of said M antennas being adapted to transmit the down-link frequency associated with the particular zone it covers. The bursts transmitted by the various stations are assigned a predetermined position within the frame. Each station detects whether it has received a unique word followed by the address of a given station. Upon detecting such an address, the station activates timing means which define a time interval associated with the station whose address has been detected and, at the end of that time interval, starts transmitting M successive bursts respectively destined for the M zones during predetermined time intervals within the frame. These M bursts are transmitted at different up-link frequencies so that the burst intended for a given zone will be transmitted at the up-link frequency corresponding to the down-link frequency for that zone. In accordance with an embodiment of the invention, the timing means comprise M timers respectively defining N time intervals associated with the N stations. The start of a station's transmission is determined by the timer which reaches its stopping point first.

REFERENCES:
patent: 3641274 (1972-02-01), Sasaki
patent: 3761814 (1973-09-01), Bernasconi
patent: 3912876 (1975-10-01), Muller
patent: 4135156 (1979-01-01), Sandbrs

Affiliated with

Also associated with

Rating

Method and system for synchronizing a TDMA communication network does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for synchronizing a TDMA communication network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for synchronizing a TDMA communication network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-161865