Enhancing a push-to-talk communication system
First Claim
1. An enhancing device for enhancing communication in a peer-to-peer communication system capable of operating in push-to-talk mode, the communication system comprising terminals capable of push-to-talk, peer-to-peer radio communication directly between the terminals, without involving a cellular network using wireless radio signals, the enhancing device being arranged for coupling with a terminal and comprising:
- an antenna for transmitting and receiving the wireless radio signals,a band-pass filter for selecting a frequency band of the radio signals,a bidirectional amplifier for amplifying the radio signals alternatingly in a transmitting direction from the terminal to the antenna and in a receiving direction from the antenna to the terminal,a control unit for controlling switching of the bidirectional amplifier between the transmitting direction and the receiving direction in response to a sensor signal,a connection for transmitting and receiving the radio signals to and from the terminal, the band-pass filter and the bidirectional amplifier being coupled between the connection and the antenna for passing the radio signals by means of band-pass filtering and amplification, anda sensor for detecting whether the terminal is transmitting or receiving the radio signals and for producing the sensor signal in response thereto, wherein the sensor is galvanically isolated from the terminal.
3 Assignments
0 Petitions
Accused Products
Abstract
A peer-to-peer communication system (1) capable of operating in push-to-talk mode comprises terminals (2, 2A, 6) capable of push-to-talk, peer-to-peer radio communication, and an enhancing device (3) arranged for coupling with the terminal. The enhancing device (3) comprises: • an antenna (31) for transmitting and receiving radio signals, • a band-pass filter (32) for selecting a frequency band of the radio signals, • a bidirectional amplifier (33) for amplifying radio signals alternatingly in a transmitting and in a receiving direction, • a control unit (34) for controlling the bidirectional amplifier (32) in response to a sensor signal, and • a sensor (35) for detecting whether the terminal (2A; 6) is transmitting or receiving and for producing the sensor signal in response thereto, which sensor is galvanically isolated from the terminal. The communication system (1) may be a Terrestrial Trunked Radio system, commonly known as TETRA system, more in particular a TETRA system operating in Direct Mode. The antenna (31) may be a can antenna or a loop-fed antenna. Lighting device with a wind-powered cleaning member.
3 Citations
25 Claims
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1. An enhancing device for enhancing communication in a peer-to-peer communication system capable of operating in push-to-talk mode, the communication system comprising terminals capable of push-to-talk, peer-to-peer radio communication directly between the terminals, without involving a cellular network using wireless radio signals, the enhancing device being arranged for coupling with a terminal and comprising:
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an antenna for transmitting and receiving the wireless radio signals, a band-pass filter for selecting a frequency band of the radio signals, a bidirectional amplifier for amplifying the radio signals alternatingly in a transmitting direction from the terminal to the antenna and in a receiving direction from the antenna to the terminal, a control unit for controlling switching of the bidirectional amplifier between the transmitting direction and the receiving direction in response to a sensor signal, a connection for transmitting and receiving the radio signals to and from the terminal, the band-pass filter and the bidirectional amplifier being coupled between the connection and the antenna for passing the radio signals by means of band-pass filtering and amplification, and a sensor for detecting whether the terminal is transmitting or receiving the radio signals and for producing the sensor signal in response thereto, wherein the sensor is galvanically isolated from the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 24)
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14. A peer-to-peer communication system capable of operating in push-to-talk mode, the communication system comprising:
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terminals capable of push-to-talk, peer-to-peer radio communication directly between the terminals, without involving a cellular network using wireless radio signals, and an enhancing device arranged for coupling with a terminal, the enhancing device comprising; an antenna for transmitting and receiving the radio signals, a band-pass filter for selecting a frequency band of the radio signals, a bidirectional amplifier for amplifying the radio signals alternatingly in a transmitting direction from the terminal to the antenna and in a receiving direction from the antenna to the terminal, a connection to the terminal, the band-pass filter and the bidirectional amplifier being coupled between the connection and the antenna for passing the radio signals between the antenna and the terminal by means of band-pass filtering and amplification, a control unit for controlling switching of the bidirectional amplifier between the transmitting direction and the receiving direction in response to a sensor signal, and a sensor for detecting whether the terminal is transmitting or receiving the radio signals and for producing the sensor signal in response thereto, wherein the sensor is galvanically isolated from the terminal. - View Dependent Claims (15, 16, 17, 18, 19, 25)
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20. A method of enhancing communication in a peer-to-peer communication system capable of operating in push-to-talk mode, the communication system comprising:
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terminals capable of push-to-talk, peer-to-peer radio communication directly between the terminals, without involving a cellular network using wireless radio signals, and a dispatcher unit for dispatching information to the terminals, the method comprising the step of coupling an enhancing device for enhancing communication with a terminal, the enhancing device comprising; an antenna for transmitting and receiving the radio signals, a band-pass filter for selecting a frequency band of the radio signals, a bidirectional amplifier for amplifying the radio signals alternatingly in a transmitting direction from the terminal to the antenna and in a receiving direction from the antenna to the terminal, a control unit for controlling switching of the bidirectional amplifier between the transmitting direction and the receiving direction in response to a sensor signal, a connection to the terminal, the band-pass filter and the bidirectional amplifier being coupled between the connection and the antenna for passing the radio signals between the antenna and the terminal by means of band-pass filtering and amplification, and a sensor for detecting whether the terminal is transmitting or receiving the radio signal and for producing the sensor signal in response thereto, wherein the sensor is galvanically isolated from the terminal. - View Dependent Claims (21, 22, 23)
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Specification