Motorola Corporation

Richard Lee Van Egeren

Rod N Averbuch

Frank W Korinek

Todd A Leigh

Jeff Blanchette

A subscriber unit () is gracefully migrated from a selected base transceiver station () to an alternate base transceiver station () by attenuating the communication signals transmitted by the selected base transceiver station (). A subscriber unit () communicatively coupled to the selected base transceiver station () compares the attenuated communication signal strength to communications signals generated by alternate base transceiver stations () until an alternative communication signal having greater signal strength is identified. The subscriber unit () then migrates to the base transceiver station () transmitting the alternative communication signal. The rate of active data packet transmissions to a subscriber unit () is increased by using all available traffic channels to transmit data packet. A message is transmitted to a subscriber unit () attempting to establish communicative coupling with the selected base transceiver station () to delay attempts to initiate a communicative coupling with the wireless communication network ().

Method and apparatus for removing a base transceiver station from a wireless communication system

A method and apparatus resolves message collisions in wireless TDMA packet systems for subscribers that communicate in half duplex modes. In one embodiment, a wireless TDMA network element () includes at least one processing device () and memory (), operatively coupled to the processing device (). The processing device () divides an outbound message () designated for a first subscriber and produces therefrom an independent first message portion (such as an independent short message) () and an independent second message portion (such as an independent longer remaining message) (). Each of the independent first and second message portions () are allocated to two different wireless outbound reservations for a common subscriber. The independent first message () is transmitted first. If a collision is detected, the wireless network element () avoids sending the independent second portion () to the first subscriber, otherwise the independent second message portion () is subsequently sent.

Method and apparatus for resolving half duplex message collisions

A data communications system includes a server router (,), such as an access controller gateway, operably coupled to at least one client router (,), such as a base radio controller, by an asynchronous link, such as a LAN (,). The client router forwards data received from the server router and stored in the client router's outbound queue (,) synchronously to a device, such as a mobile station (,). The client router's outbound queue is maintained between a lower queue limit and an upper queue limit so as to both reduce the occurrence of data starvation and reduce the amount of data lost should the mobile station hand off to a new serving site. The server router calculates an optimum average send rate and transmits data in bursts at regular intervals, and adjusts the average send rate in response to changes in the outbound rate of the client router. The client router is state machine driven, and sends flow control messages only when entering a new state so as to reduce the amount of flow control messaging.

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Arlington Heights, IL, United States of America

Richard Lee Van Egeren