Nationwide communication system
DC CAFCFirst Claim
1. A communication method for controlling a mobile transceiver which may communicate with a communication network controlled by a computer, the network including a plurality of base transmitters for transmitting messages from the network to the mobile transceiver and base receivers for receiving messages from the mobile transceiver, the mobile transceiver being capable of sending registration signals to be received by a base receiver in the network to allow the network to identify the mobile transceiver'"'"'s approximate location according to the location of the base receiver(s) that received the registration signals and being capable of sending a message acknowledgment signal when the mobile transceiver receives a message from the network to indicate successful delivery of the message, and the plurality of base transmitters in the network being capable of sending a probe signal to the mobile transceiver to cause the mobile transceiver to transmit a probe acknowledgment signal to be received by a base receiver in the network to allow the network to identify the mobile transceiver'"'"'s approximate location according to the location of the base receiver that received the acknowledgment signal, the method comprising the steps of:
- (a) sending a message from the network to the mobile transceiver to disable the mobile transceiver'"'"'s capability to transmit registration signals;
(b) storing in the network the number of probe signals sent by the network to the mobile transceiver during a first period of time and the number of messages successfully delivered to the mobile transceiver by the network during a second period of time;
(c) determining a likelihood that a probe signal will be required to be sent by the network to deliver a message by evaluating the stored number of probe signals and stored number of messages successfully delivered; and
(d) sending a message to the mobile transceiver to enable the mobile transceiver'"'"'s capability to transmit a registration signal if the calculated likelihood exceeds a selected value.
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Accused Products
Abstract
A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network. The base transmitters are divided into zonal assignments and broadcast in simulcast using multi-carrier modulation techniques. The system network controls the base transmitters to broadcast in simulcast during both systemwide and zonal time intervals. The system network dynamically alters zone boundaries to maximize information throughput. The preferred mobile unit includes a noise detector circuit to prevent unwanted transmissions. The system network further provides an adaptive registration feature for mobile units which controls the registration operations by the mobile units to maximize information throughput.
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Citations
10 Claims
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1. A communication method for controlling a mobile transceiver which may communicate with a communication network controlled by a computer, the network including a plurality of base transmitters for transmitting messages from the network to the mobile transceiver and base receivers for receiving messages from the mobile transceiver, the mobile transceiver being capable of sending registration signals to be received by a base receiver in the network to allow the network to identify the mobile transceiver'"'"'s approximate location according to the location of the base receiver(s) that received the registration signals and being capable of sending a message acknowledgment signal when the mobile transceiver receives a message from the network to indicate successful delivery of the message, and the plurality of base transmitters in the network being capable of sending a probe signal to the mobile transceiver to cause the mobile transceiver to transmit a probe acknowledgment signal to be received by a base receiver in the network to allow the network to identify the mobile transceiver'"'"'s approximate location according to the location of the base receiver that received the acknowledgment signal, the method comprising the steps of:
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(a) sending a message from the network to the mobile transceiver to disable the mobile transceiver'"'"'s capability to transmit registration signals; (b) storing in the network the number of probe signals sent by the network to the mobile transceiver during a first period of time and the number of messages successfully delivered to the mobile transceiver by the network during a second period of time; (c) determining a likelihood that a probe signal will be required to be sent by the network to deliver a message by evaluating the stored number of probe signals and stored number of messages successfully delivered; and (d) sending a message to the mobile transceiver to enable the mobile transceiver'"'"'s capability to transmit a registration signal if the calculated likelihood exceeds a selected value. - View Dependent Claims (2, 3, 4)
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5. A communication method for controlling a mobile transceiver which may communicate with a communication network controlled by a computer, the network including a plurality of base transmitters for transmitting messages to the mobile transceiver and base receivers for receiving messages from the mobile transceiver, the mobile transceiver being capable of sending registration signals to be received by a base receiver in the network to allow the network to identify the mobile transceiver'"'"'s approximate location according to the location of the base receiver(s) that received the registration signals and being capable of sending a message acknowledgment signal when the mobile transceiver receives a message from the network to indicate successful delivery of the message, the network using received registration signals to determine a set of base transmitters to be operated to transmit a message to the mobile transceiver, the method comprising the steps of:
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(a) storing in the network the number of registration signals from the mobile transceiver to the network during a first period of time and the number of messages successfully delivered to the mobile transceiver by the network during a period of time; (b) processing the stored number of registration signals and number of messages successfully delivered to evaluate a likelihood that a registration signal from said mobile transceiver will not be used by the network to determine a set of base transmitters; and (c) sending a message to the mobile transceiver to disable the mobile transceiver'"'"'s capability to transmit a registration signal if the likelihood exceeds a selected value. - View Dependent Claims (6, 7, 8)
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9. A communication method implemented in a computer controlled communication network for locating a mobile transceiver within a region of space, the region of space being divided into a plurality of zones with each zone serviced by at least one base transmitter and at least one base receiver, the network storing data corresponding to a zone where the mobile transceiver was last known to be located, the communication method comprising the steps of:
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(a) transmitting a message signal by a base transmitter servicing a zone where the mobile transceiver was last known to be located; (b) transmitting a systemwide probe signal by a plurality of base transmitters servicing a plurality of zones if the mobile transceiver does not indicate receipt of the message signal from the base transmitter; (c) receiving the systemwide probe signal by the mobile transceiver; (d) transmitting an acknowledgment signal by the mobile transceiver in response to the received systemwide probe signal; (e) receiving the acknowledgment signal from the mobile transceiver by a base receiver; (f) updating the data stored in the network to reflect the zone of the base receiver that received the acknowledgment signal as the last known location of the mobile transceiver; (g) determining whether failure of the mobile transceiver to receive the message transmitted in step (a) is likely caused by inter-zonal interference; and (h) retransmitting the message signal systemwide when the network determines that failure of the mobile transceiver to receive the message transmitted in step (a) is likely caused by inter-zonal interference.
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10. A communication method implemented in a computer controlled communication network for locating a mobile transceiver within a region of space, the region of space being divided into a plurality of zones with each zone serviced by at least one base transmitter and at least one base receiver, the network storing data corresponding to a zone where the mobile transceiver was last known to be located, the communication method comprising the steps of:
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(a) transmitting a message signal by a base transmitter servicing a zone where the mobile transceiver was last known to be located; (b) transmitting a systemwide probe signal by a plurality of base transmitters servicing a plurality of zones if the mobile transceiver does not indicate receipt of the message signal from the base transmitter; (c) receiving the systemwide probe signal by the mobile transceiver; (d) transmitting an acknowledgment signal by the mobile transceiver in response to the received systemwide probe signal; (e) receiving the acknowledgment signal from the mobile transceiver by a base receiver; (f) updating the data stored in the network to reflect the zone of the base receiver that received the acknowledgment signal as the last known location of the mobile transceiver; (g) determining whether failure of the mobile transceiver to receive the message transmitted in step (a) is likely caused by the mobile unit being located in a weak signal area within a zone; and (h) retransmitting the message signal in the zone where the mobile transceiver was last known to be located using an error correcting code when the network determines that failure of the mobile transceiver to receive the message signal transmitted in step (a) is likely caused by the mobile unit being located in the weak signal area within a zone.
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Specification