Patent ID: 6151312
Filing Date: 2000-11-21
Classification: H04L,H04Q,H04W

Abstract:
In a networking protocol for wireless point (base station) to multipoint users network stations where each user is stationary and which utilizes time-division multiplexing in a downstream direction of the base station to the user, and time-division multiple access in the upstream direction of the user to the base station, with the stationary users being equipped with high gain directional antennas, the improvement comprising that means for providing transmission of a convergence layer wherein:a) time-division multiplexing is performed on an ATM cell basis in the downstream direction of the base station to the user;b) time-division multiple access on an ATM cell basis is used in the upstream direction of the user to the base station;c) upstream frame timing is synchronized to the downstream frame timing, where the first time slot of the downstream frame carries a Frame Start ATM cell which is an OAM cell identified by a unique reserved VPI/VCI;d) frame periods in both the upstream and downstream directions are approximately but not greater than six milliseconds in length to allow delivery of voice traffic with minimum latency.