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Apparatus and method for dynamically selecting transmitter for directed message delivery

A technology for directional messages and transmitters, which is applied in transmission systems, broadcast transmission systems, digital transmission systems, etc., and can solve problems such as system utilization reduction

Inactive Publication Date: 2004-06-16
MOTOROLA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, a potential opportunity to deliver contemporaneous directed messages to both messaging units may be lost, resulting in reduced utilization of the system

Method used

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  • Apparatus and method for dynamically selecting transmitter for directed message delivery
  • Apparatus and method for dynamically selecting transmitter for directed message delivery
  • Apparatus and method for dynamically selecting transmitter for directed message delivery

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Embodiment Construction

[0029] For a clearer understanding of the present invention, the reader is referred to Figure 1 which depicts a representative messaging system (100), preferably a selective messaging system. The messaging system includes a gateway or terminal (101) coupled to a messaging resource such as the public switched telephone network (103). The terminal is available from Motorola's WMG TM products and from other manufacturers. The terminal is coupled to a system controller (105), such as Motorola's RFC TM or CONDUCTOR, and this terminal is often associated with the system controller. The terminal and the system controller work together to transmit messages with destination addresses to the system controller, or various responses from the PSTN and the sender back to the terminal.

[0030]The messaging system includes a plurality of transmitters, three transmitters are depicted in the figure as first, second and nth transmitters (107, 109, . . . , 111). The transmitter can use Motor...

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Abstract

Apparatus and method for dynamically selecting a transmitter for directed message delivery in a messaging system (100) including plural transmitters (107-111) operating in a simulcast or non-simulcast mode. A communication system (1100) dynamically selects transmitters (1115) by sending transmission signals, receiving the transmission signals at a PMU (1105), calculating signal strengths of the transmission signals, transmitting a signal indicative of the signal strengths, receiving the signal and determining therefrom carrier-to-interference (C / I) values indicative of relative strengths of the transmission signals at a controller (1110), and delivering a message with a selected transmitter associated with a lowest C / I value that is chosen from the C / I values and that exceeds a C / I threshold value.

Description

technical field [0001] The present invention relates to wireless communication, in particular to an apparatus and method for dynamically selecting an ideal transmitter for transmitting messages in a communication system. Background technique [0002] Wireless communication systems or messaging systems are known. Such systems typically include a transmitter to transmit messages, a message unit (Mu) or portable message unit (PMU) to receive messages, a controller to control message transmission operations, and a communication system coupled to a public switched service such as a telephone or Internet system terminal or gateway. Such systems typically transmit messages using a simulcast transmission mode. Simulcast mode represents a situation where all transmitters within an area are simultaneously active on the same radio frequency. To simplify, and indeed to be able to successfully communicate in simulcast mode, great care must be taken to ensure that the modulation of wir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04H20/67H04L1/24H04W84/02H04W88/18
CPCH04W84/022H04L1/242H04W88/185H04H20/67
Inventor 斯利姆・索依斯萨默・萨瓦亚杰罗恩・P・多伦博斯阿兰・查尔斯・路易斯・布里恩康格里高里・路易斯・坎农
Owner MOTOROLA INC