H - Electricity – 04 – B
Patent
H - Electricity
04
B
363/11
H04B 7/185 (2006.01) H04B 7/212 (2006.01)
Patent
CA 1140687
DEMAND ASSIGNMENT TECHNIQUE FOR TDMA SATELLITE COMMUNICATION NETWORK ABSTRACT In a time division multiple access satellite communi- cation system, a reference station which allocates channel capacity also regulates demand by the ground stations for that capacity. The regulation is accom- plished by means in the reference station for trans- mitting limiting, blocking and revocation messages to the ground stations and means in the ground stations responsive to these messages to regulate the processing of input service requests. The limiting messages notify the ground stations to limit their channel usage to the channels required in the last demand message transmitted but not to exceed their last channel assignment. The blocking messages instruct the ground stations to unconditionally block any new requests for service on their input ports, rather than counting such calls as increments of demand, and thereby effectively reduce the aggregate demand in the system. When the reference station observes that a sufficient decrease in channel requirements occurs, resulting in an increasing spare capacity, it revokes the previously communicated blocking messages by a revocation message. MA9-78-11
356155
Fennel John W. Jr.
Oblonsky Jan G.
International Business Machines Corporation
Saunders Raymond H.
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