Method and apparatus for improving the reliability of communicating a message from a portable subscriber unit to a base receiver in a two-way radio messaging system
First Claim
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1. A method for improving a reliability of communicating a message from a portable subscriber unit to a base receiver on an inbound channel of a two-way radio messaging system, comprising the steps of:
- monitoring by the portable subscriber unit a signal fading rate in an outbound channel from a base transmitter;
transmitting the message once by the portable subscriber unit in response to the signal fading rate being less than a predetermined value; and
sending the message more than once by the portable subscriber unit in response to the signal fading rate being greater than or equal to the predetermined value.
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Abstract
A portable subscriber unit (104) monitors (602) a signal fading rate in an outbound channel from a base station (102), and transmits a message. The portable subscriber unit transmits (606) the message once on an inbound channel in response to the signal fading rate in the outbound channel being less than a predetermined value. The portable subscriber unit transmits (608) the message more than once in response to the signal fading rate in the outbound channel being greater than or equal to the predetermined value.
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Citations
21 Claims
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1. A method for improving a reliability of communicating a message from a portable subscriber unit to a base receiver on an inbound channel of a two-way radio messaging system, comprising the steps of:
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monitoring by the portable subscriber unit a signal fading rate in an outbound channel from a base transmitter; transmitting the message once by the portable subscriber unit in response to the signal fading rate being less than a predetermined value; and sending the message more than once by the portable subscriber unit in response to the signal fading rate being greater than or equal to the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A portable subscriber unit having an improved reliability of communicating a message to a base receiver on an inbound channel of a two-way radio messaging system, the portable subscriber unit comprising:
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a processor for controlling the portable subscriber unit; a clock coupled to the processor for generating a timing signal; a receiver coupled to the processor for monitoring a signal fading rate in an outbound channel from a base transmitter; and a transmitter coupled to the processor for transmitting the message, wherein the processor is programmed to control the transmitter to transmit the message once in response to the signal fading rate being less than a predetermined value, and to send the message more than once in response to the signal fading rate being greater than or equal to the predetermined value. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A base station having an improved reliability of receiving a message from a portable subscriber unit on an inbound channel of a two-way radio messaging system, the base station comprising:
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a base receiver for receiving the inbound channel; a processor coupled to the base receiver for cooperating with the base receiver to monitor noise in the inbound channel; and a transmitter coupled to the processor for transmitting messages and commands to the portable subscriber unit on an outbound channel, wherein the processor is programmed to control the transmitter to transmit a command commanding the portable subscriber unit to send inbound messages more than once in response to the noise in the inbound channel being greater than a predetermined value.
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Specification