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.