Distributed voting system and method for land mobile radio system
First Claim
1. A distributed voter system for selecting at least one of several signals for transmission, comprising:
- a plurality of receivers, each receiver comprising at least one receiving channel capable of acquiring a received signal;
a receiver processor capable of evaluating a quality measure of said received signal and signal transmitting circuitry for producing a transfer signal, said transfer signal comprising said received signal and said quality measure;
a plurality of network connections whereby each of said plurality of receivers is connected to a common communications network;
a transmitter connected to said common communications network, said transmitter comprising signal receiving circuitry for receiving said transfer signals from said plurality of receivers;
a transmitter processor capable of selecting one of said transfer signals based on said quality measure; and
at least one transmission channel capable of transmitting a broadcast signal comprising substantially said received signal portion of said selected transfer signal.
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Accused Products
Abstract
A distributed Internet Protocol (IP) voting system and method for use in Land Mobile Radio (LMR) Systems having a central send-and-receive site and one or more receive-only sites. In the distributed voting system, receive-only sites are directly linked to the control point using a network and associated packet transmission protocol. This may be a high-speed asynchronous data link such as a standard IP network link. Each remote site receiving digital data, calculates a bit error for that data. This error calculation is incorporated into the data header information. The data header information and data are placed in an IP packet and transmitted as a User Data Protocol (UDP) message to the control point. The control point selects the lowest bit rate data message, or the first control message, and retransmits it using a standard radio air interface protocol, such as the APCO Project 25 air interface protocol.
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Citations
20 Claims
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1. A distributed voter system for selecting at least one of several signals for transmission, comprising:
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a plurality of receivers, each receiver comprising at least one receiving channel capable of acquiring a received signal;
a receiver processor capable of evaluating a quality measure of said received signal and signal transmitting circuitry for producing a transfer signal, said transfer signal comprising said received signal and said quality measure;
a plurality of network connections whereby each of said plurality of receivers is connected to a common communications network;
a transmitter connected to said common communications network, said transmitter comprising signal receiving circuitry for receiving said transfer signals from said plurality of receivers;
a transmitter processor capable of selecting one of said transfer signals based on said quality measure; and
at least one transmission channel capable of transmitting a broadcast signal comprising substantially said received signal portion of said selected transfer signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A distributed voter method for selecting at least one of several signals for transmission, comprising the steps of:
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a) remotely receiving an input signal at a plurality of receiving sites;
b) evaluating, at each of said plurality of receiving sites, a quality measure of said input signal;
c) packaging, at each of said plurality of receiving sites, said input signal and said quality measure as a data packet;
d) transmitting, from each of said plurality of receiving sites, said data packet to a central controller as a transfer signal using a common communications network;
e) centrally receiving a plurality of transfer signals at said central controller;
f) selecting one of said transfer signals based on said quality measure; and
,g) transmitting a broadcast signal, said broadcast signal comprising substantially said input signal portion of said of said selected transfer signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A distributed voter system for selecting at least one of several signals for transmission, comprising:
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a plurality of receivers, each receiver including means for receiving input signals, means for evaluating a quality measure of said received signal and means for producing a transfer signal, said transfer signal comprising said input signal and said quality measure;
a network means for transferring said transfer signals; and
,a transmitter having means for receiving said transfer signals;
means for selecting one of said transfer signals based on said quality measure and means for transmitting a broadcast signal comprising substantially said input signal portion of said of said selected transfer signal. - View Dependent Claims (18, 19, 20)
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Specification