Abstract:
In accordance with the present invention, there is provided an optimized, transmission-economized serial bus protocol comprising at least one eight-bit word further comprising at least an operation code and a subargument Fig. 2). The operation code and subargument comprise, respectively, either a star-of-message character or start-of-reply character and either a device destination address or the device's source address (Fig. 3). Further, an error detection device is provided comprising an even parity bit. Moreover, there is provided and optimized method of bus contention comprising monitoring the bus for an idle or busy bus condition and either attempting an asynchronous bus access if the bus is idle or synchronously attempting a prioritized retry after a busy bus condition is sensed, after a bus access collision is sensed, and upon initial power-up, synchronized to the current message completion. The prioritization comprises a constant time delay plus a bit-time delay proportional to said accessing device's address identification (Fig. 5). Finally, there is provided an optimized method of inter-device message addressing and handshaking in a multi-access, bussed system, each device having a source and destination address, comprising addressing a message to a destination address and awaiting the addressed destination device to acknowledge by echoing its corresponding source address and also monitoring the bus for an announcement of a source addressed event and performing a function in response thereto. Drawings
Abstract:
A communications system and method for exchanging spectrum usage information through a drop box (100) includes one or more central stations (101) that defines a region of operation. A central drop box (102) is associated with the central station (101) for providing a database of spectrum usage information. Stations (103, 105, 107) using the communications system may submit information regarding spectrum usage to the central drop box (102) that affects the region of operation (109, 115) for providing the most efficient and non-interfering uses of the frequency spectrum.
Abstract:
Un método para transmitir transmisiones de radiobaliza en un sistema de comunicaciones de red de área local inalámbrica (WLAN) (100) que opera en uno o más canales incluye transmitir una primera radiobaliza (C1) utilizando una antena direccional en una primera dirección (D1) en un primer canal; una segunda radiobaliza (C2) después es transmitida utilizando una antena direccional en una segunda dirección (D2) en el primer canal; este proceso es repetido entonces de manera que la primera radiobaliza y la segunda radiobaliza después de un intervalo de radiobaliza predeterminado; la primera radiobaliza comienza su transmisión en un tiempo de transmisión de radiobaliza objetivo (TBTT) y la segunda radiobaliza comienza su transmisión en un periodo secuencial definido por un tiempo de conmutación de antena después de la transmisión de la primera radiobaliza.
Abstract:
A method for transmitting beacons by nodes in a multi-tier wireless local area network is disclosed. First, a first beacon by a tier 1 node in the multi-tier wireless local area network is transmitted. Then, a second beacon by a tier 2 node is transmitted where the second beacon is transmitted based upon the time that the first beacon is sent by the tier 1 node.
Abstract:
Métodos para efectuar comunicaciones de cliente a cliente en una red de área local inalámbrica. En un cliente de la capa ônö de la red de área local inalámbrica, se recibe un mensaje de senalizacion de un cliente de la capa ôn-1ö, donde el mensaje de senalizacion comprende un primer período, un segundo período y un tercer período. Comunicarse con el cliente de la capa ôn-1ö durante el primer período y comunicarse con el cliente de la capa ôn+1ö durante el tercer período. En un punto de acceso de la red de área local inalámbrica, se crea una tabla de asociaciones que identifica los clientes de la red de área local inalámbrica y se determina un primer período para efectuar comunicaciones de cliente a cliente en base a la tabla de asociaciones y el tráfico de la red de área local inalámbrica, donde el punto de acceso no se comunica con los clientes durante el primer período.
Abstract:
At a first device ( 102 or 104 ), a message is received and processed. If the message is processed during a first time period, the first device transmits an acknowledgement message during a second time period; otherwise the first device transmits the acknowledgment message during a third time period. The second time period and the third time period are exclusive of each other.
Abstract:
A communication system (100) is facilitated by an access node (102) to support communication with subscriber units (104, 106) as secondary users of a regulated spectrum portion. The access node requests permission to operate as a secondary user from an authorization server (118). The authorization server provides authorized transmission parameters based on characteristics of the access node. The access node operates according to the authorized transmission parameters and provides the parameters to eligible subscriber units.