Shared time universal multiple access network
View Patent ↗A method of controlling access to a network media by a plurality of stations, the method including determining a number of time slots; determining a number of slot cycles for each time slot, at least one of the time slots having more than one slot cycle; assigning each station one or more slot cycles in one or more time slots; and operating each of the stations by initializing an access timer to time out at the beginning of the station's assigned slot cycle(s) and transmitting data during the assigned slot cycle(s), the access timer being stopped whenever a station transmits over the network, and restarted at the end of transmission.
1. A method of controlling access to a network media by a plurality of stations, the method comprising:
determining a number of time slots;
determining a number of slot cycles for each time slot, at least one of the time slots having more than one slot cycle;
assigning each station one or more slot cycles in one or more time slots;
operating each of the stations by initializing an access timer to time out at the beginning of the station's assigned slot cycle(s) and transmitting data during the assigned slot cycle(s), the access timer being stopped whenever a station transmits over the network, and restarted at the end of transmission; and
sending a standard sync signal after a cycle of each of the time slots, and sending a master sync signal after the time slots have cycled a number of times corresponding to the number of slot cycles of the time slot having the most slot cycles.
2. The method claimed in claim 1 , further comprising providing unassigned slot cycles in a time slot, thereby reducing the bandwidth available to stations having slot cycles in the same time slot, and shifting the bandwidth to the other slots with priority given to the slot immediately following the slot having the unassigned slot cycle.
3. The method claimed in claim 1 , wherein the stations include an access timer that is initialized in response to a synchronization signal and wherein the stations are operated according to a Universal Multiple Access protocol that includes using a current access number CAN.
4. The method claimed in claim 3 , wherein the CAN is rotated by a fixed amount.
5. The method claimed in claim 3 , wherein the CAN is changed to give priority to give priority to a station assigned to a slot after the one that most recently transmitted.
6. The method claimed in claim 1 , wherein the stations are operated according to a protocol that includes using a first access window FAW that represents the slot number of the next slot after the slot whose message was just received or transmitted.
7. A method of controlling access to a network media by a plurality of station, the method comprising:
determining a number of time slots;
determining a number of slot cycles for each time slot, at least one of the time slots having more than one slot cycle;
assigning each station one or more slot cycles in one or more time slots; and
operating each of the stations by initializing an access timer to time out at the beginning of the station's assigned slot cycle(s) and transmitting data during the assigned slot cycle(s), the access timer being stopped whenever a station transmits over the network, and restarted at the end of transmission;
wherein a slot cycle is assigned to a station using a three number access vector including a time slot number, a slot cycle number within the time slot and a total number of slot cycles assigned to the time slot.
8. The method of claim 7 , wherein the controlling access to the network media by the plurality of stations is conducted in a network adapter.