Method for determining a control channel in a trunked radio communications system utilizing a scan list
First Claim
1. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprise at least one site, at least one control channel, at least one voice channel, and a plurality of receiving devices, a method for determining a control channel, the method comprising the steps of:
- at a receiving device in the trunked radio communications system;
retrieving a first frequency from a scan list, wherein the first frequency relates to a frequency in the 800 MHz spectrum;
tuning the receiving device to about the first frequency;
tuning the receiving device to about a second frequency in the scan list, if no control channel messages are decoded at the first frequency; and
iterating through the scan list, if no control channel messages are decoded at the second frequency until the last frequency in the scan list is reached,wherein the scan list comprises control channels for at least two band plans.
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Abstract
A receiving device in a trunked radio communications system retrieves a first frequency from a scan list and tunes to about the first frequency. If no control channel messages are decoded at the first frequency, then the receiving device tunes to about a second frequency. If no control channel messages are decoded at the second frequency, then the receiving device iterates through the scan list, until the last frequency in the scan list is reached, wherein the scan list comprises control channels for at least two band plans.
18 Citations
19 Claims
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1. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprise at least one site, at least one control channel, at least one voice channel, and a plurality of receiving devices, a method for determining a control channel, the method comprising the steps of:
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at a receiving device in the trunked radio communications system; retrieving a first frequency from a scan list, wherein the first frequency relates to a frequency in the 800 MHz spectrum; tuning the receiving device to about the first frequency; tuning the receiving device to about a second frequency in the scan list, if no control channel messages are decoded at the first frequency; and iterating through the scan list, if no control channel messages are decoded at the second frequency until the last frequency in the scan list is reached, wherein the scan list comprises control channels for at least two band plans. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. In a trunked radio communications system operating in the 800 MHz spectrum wherein the trunked radio communications system comprise at least one site, at least one control channel, at least one voice channel, and a plurality of receiving devices, a method for determining a control channel, the method comprising the steps of:
at a receiving device in the trunked radio communications system; retrieving a first frequency from a scan list, wherein the first frequency relates to a frequency in the 800 MHz spectrum; tuning the receiving device to about the first frequency; tuning the receiving device to about a second frequency in the scan list, if no control channel messages are decoded at the first frequency; and iterating through the scan list, if no control channel messages are decoded at the second frequency until the last frequency in the scan list is reached, wherein the scan list comprises control channels for at least two band plans, and wherein the control channel messages are defined by Motorola'"'"'s 3600-baud trunking protocol. - View Dependent Claims (15, 16, 17, 18, 19)
Specification