摘要:
A method and apparatus is used for transmitting an outbound message in a two-way messaging system having a plurality of cells employing frequency reuse. The outbound message is transmitted to a selective call transceiver (122) utilizing a first frequency reuse plan (312). The two-way messaging system awaits a positive acknowledgment (316, 318) from the selective call transceiver (122) confirming that the outbound message was received with an acceptable quality. The two-way messaging system retransmits the outbound message to the selective call transceiver (122) utilizing a second frequency reuse plan (332), in response to receiving a negative acknowledgment and also in response to failing to receive any acknowledgment within a predetermined time after transmitting the outbound message.
摘要:
A communication system (100) is designed that reduces co-channel interference when heterogeneous users (101-104) are sharing spectrum. The system design enables a plurality of pairs of users to communicate their channel utilization time periods by using the durations and start or stop times of certain transmissions to signal the start times and durations of later transmissions. Other system users using possibly different communications protocols and different modulation technologies can measure the durations of received transmissions and to infer channel usage based on these durations.
摘要:
A method and apparatus is used for transmitting an outbound message in a two-way messaging system having a plurality of cells employing frequency reuse. The outbound message is transmitted to a selective call transceiver (122) utilizing a first frequency reuse plan (312). The two-way messaging system awaits a positive acknowledgment (316, 318) from the selective call transceiver (122) confirming that the outbound message was received with an acceptable quality. The two-way messaging system retransmits the outbound message to the selective call transceiver (122) utilizing a second frequency reuse plan (332), in response to receiving a negative acknowledgment and also in response to failing to receive any acknowledgment within a predetermined time after transmitting the outbound message.
摘要:
Procédé d'enregistrement d'une unité portable qui peut être utilisée dans un système de communication qui comprend une station de contrôle comportant une base de données servant à stocker des numéros d'identification d'unités portables, une station de base, et une unité portable. Dans ce procédé, un abonné communique à la station de contrôle un premier groupe d'informations renfermant des informations relatives à l'abonné, le numéro d'identification de l'unité portable, et un code de clavier qui a été introduit dans l'unité portable (100) dans laquelle l'abonné a entré un numéro d'identification de liaison pour l'enregistrement en émission dans une mémoire située dans l'unité portable (102).
摘要:
A method of registration of a portable unit that may be utilized in a communication system that comprises a network controller, having a data base for storing portable identification numbers, a base station, and a portable unit, wherein a subscriber communicates to the network controller a first information set which comprises subscriber qualifying information, the portable identification number, and a key code that has been entered into the portable (100), and wherein the subscriber has entered a link identification number for over-the-air registration into a memory within the portable unit (102).
摘要:
Grâce à la méthode et à l'appareil décrits, une unité de communication (10) transmet une demande de voie de communication et l'installation de base (12) la plus proche procède à l'attribution ou à l'affectation de la voie de communication. Une installation de base reçoit le signal de demande de voie, mesure le niveau d'intensité du signal reçu, et si ce niveau dépasse un certain seuil, une voie de communication est affectée à l'unité de communication demandeuse, ce qui crée une liaison de communication. Si l'intensité du signal de demande de voie ne dépasse pas le seuil fixé, l'installation de base retarde l'attribution d'une voie de communication pendant une durée inversement proportionnelle au niveau d'intensité du signal mesuré afin de permettre à d'autres installations de base d'attribuer une voie de communication à l'unité de communication demandeuse. Si l'installation de base constate qu'une autre installation de base a attribué une voie de communication à l'unité de communication demandeuse, le processus d'affectation est interrompu, et l'installation de base continue à rechercher des signaux de demande de voie.
摘要:
Remote units within a first communication system ( 121 ) utilizes frequencies (channels) from a second communication system ( 120 ) when placing a call. When a first remote unit ( 106 ) wants to call a second remote unit ( 107 ) using the channels, the first remote unit sends a base station ( 103 ) a list of top N traffic channel blocks from the second communication system along with the identity of the second remote unit. The base station then pages the second remote unit using a signaling channel reserved by second system. The second remote unit responds to the page with its list of best traffic channel blocks/chunks. The base station then picks the best overlap of idle channels from the list received by the remote units, and sends the list to the remote units instructing them use those traffic channels. Once the remote units receive the available channels, they can begin their call.
摘要:
A communication system (100) for determining the optimum direction (206) for transmitting and receiving a signal in a radio comprises a receiver for receiving a carrier signal being a time divided signal having an instruction signal, a transmitter for transmitting a time divided signal, a directional antenna (10) coupled to said receiver and transmitter, and a steering device (28) for changing the phase of the carrier signal in accordance with the instruction signal.