US6049548A — Multi-access CS-P/CD-E system and protocols on sa…

Claim 1

Independent Claim 119 words

In a multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver over long delay channels, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound channel frequency F 1 and a common outbound channel, frequency F o , the improvement comprising: each said mobile user transceiver including a continuously listening proximity receiver for the inbound channel and a half-duplex transceiver on the inbound channel means for determining the busy or idle status of said common inbound frequency F l , and means to indicate the status of said carrier outbound channel and control the ability to transmit on the inbound channel.

Claim 2

Dependent Claim 119 words

In a multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver over long delay channels, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound channel frequency F 1 and a common outbound channel, frequency F o , the improvement comprising: each said mobile user transceiver including a continuously listening proximity receiver for the inbound channel and a half-duplex transceiver on the inbound channel means for determining the busy or idle status of said common inbound frequency F l , and means to indicate the status of said carrier outbound channel and control the ability to transmit on the inbound channel.

Claim 3

Dependent Claim 65 words

The multiple access RF communication system defined in claim 1 wherein said central hub transceiver communicates through an earth orbiting satellite and said earth orbiting satellite transmits to earth a spatial beam which is divided into a plurality of proximity regions on earth, and each mobile user is adapted to use channel sense via proximity to determine the status of a said multi-access inbound channel.

Claim 4

Dependent Claim 27 words

The multiple access RF communication system defined in claim 1 wherein said mobile user transceiver includes a visual indicator of the status of said multi-access inbound channel.

Claim 5

Dependent Claim 37 words

The multi access RF communication system defined in claim 1 wherein a controlled aircraft includes a mobile user transceiver and said central hub transceiver communicates flight control information to said controlled aircraft via said mobile user transceiver.

Claim 6

Dependent Claim 41 words

The multi access RF communications system defined in claim 4 wherein each said transceiver is adapted to respond to an airport distributed cell-like communication signal using power control and said transceiver can be used for terminal voice, data and airport surveillance.

Claim 7

Dependent Claim 124 words

In a multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising a simplex receiver at the outbound channel for receiving messages from a central controller and a half-duplex transceiver at the inbound multi-access channel for transmission of messages to the hub, listening to the channel to ensure that the channel is not busy before transmitting, and listening to the channel to extract data from proximity mobiles that may be transmitting a message to the central controller.

Claim 8

Dependent Claim 124 words

In a multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising a simplex receiver at the outbound channel for receiving messages from a central controller and a half-duplex transceiver at the inbound multi-access channel for transmission of messages to the hub, listening to the channel to ensure that the channel is not busy before transmitting, and listening to the channel to extract data from proximity mobiles that may be transmitting a message to the central controller.

Claim 9

Dependent Claim 124 words

In a multiple access RF communication system in which a plurality of mobile aircraft user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile aircraft user transceivers in close proximity with each other share a common multi-access inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising means forming voice and data communication channels, said data channels used for dependent surveillance for aircraft, whereby a mobile aircraft user transceiver announces its presence to an air traffic controller when it enters a proximity region and then is regularly polled by the traffic controller, and sends its position, speed, heading and other data in response to the poll by the traffic controller.

Claim 10

Dependent Claim 124 words

In a multiple access RF communication system in which a plurality of mobile aircraft user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile aircraft user transceivers in close proximity with each other share a common multi-access inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising means forming voice and data communication channels, said data channels used for dependent surveillance for aircraft, whereby a mobile aircraft user transceiver announces its presence to an air traffic controller when it enters a proximity region and then is regularly polled by the traffic controller, and sends its position, speed, heading and other data in response to the poll by the traffic controller.

Claim 11

Dependent Claim 152 words

In a multiple access RF communication system in which a plurality of mobile aircraft user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile aircraft user transceivers in close proximity with each other share a common multi-access (MA) inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising a method of aircraft collision avoidance wherein use by the mobile aircraft user transceiver of said inbound data channel for air-to-air collision avoidance wherein a mobile aircraft user transceiver detects the presence of another aircraft user transceiver in the proximity region by listening in on the MA inbound channel, learning the position and vector of that proximity aircraft by demodulating and interpreting the navigation data that is sent by that mobile aircraft user transceiver, and finally by taking measures to avoid that aircraft if they are on a collision course.

Claim 12

Dependent Claim 152 words

In a multiple access RF communication system in which a plurality of mobile aircraft user transceivers communicate with a central hub transceiver through an earth orbiting satellite, and wherein groups of mobile aircraft user transceivers in close proximity with each other share a common multi-access (MA) inbound frequency F 1 and a common outbound channel frequency F o , the improvement comprising a method of aircraft collision avoidance wherein use by the mobile aircraft user transceiver of said inbound data channel for air-to-air collision avoidance wherein a mobile aircraft user transceiver detects the presence of another aircraft user transceiver in the proximity region by listening in on the MA inbound channel, learning the position and vector of that proximity aircraft by demodulating and interpreting the navigation data that is sent by that mobile aircraft user transceiver, and finally by taking measures to avoid that aircraft if they are on a collision course.

Claim 13

Independent Claim 103 words

A system for avoiding aircraft collisions in which each aircraft has an RF transceiver; a multi-beam RF communication system comprising an orbiting satellite relay which transmits to earth on one or more satellite beams, each satellite beam transmits voice, data, surveillance report back requirements and the retransmission of inbound surveillance reports from aircraft transceivers in the beam and aircraft transceivers near the beam's boundary so that each aircraft transceiver can demodulate and interpret the positional data transmitted via the satellite relay and determine if any aircraft is a collision threat and if so take measures to avoid the aircraft presenting a collision threat.

Claim 14

Independent Claim 103 words

A system for avoiding aircraft collisions in which each aircraft has an RF transceiver; a multi-beam RF communication system comprising an orbiting satellite relay which transmits to earth on one or more satellite beams, each satellite beam transmits voice, data, surveillance report back requirements and the retransmission of inbound surveillance reports from aircraft transceivers in the beam and aircraft transceivers near the beam's boundary so that each aircraft transceiver can demodulate and interpret the positional data transmitted via the satellite relay and determine if any aircraft is a collision threat and if so take measures to avoid the aircraft presenting a collision threat.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2003-04-11	2003-10-11	2004-04-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2007-04-11	2007-10-11	2008-04-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2011-04-11	2011-10-11	2012-04-11	$7700.00	Window Closed / Lapsed

Multi-access CS-P/CD-E system and protocols on satellite channels applicable to a group of mobile users in close proximity

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