METHOD TO PERFORM A WIRELESS COMMUNICATION IN A DATA COLLECTION SYSTEM
First Claim
1. A method for performing wireless communication in a data-collection system, said system comprising a plurality of devices communicating with one another over a single channel of a first data network, wherein access to said channel is based on a Carrier Sense Multiple Access (CSMA) data-transmission technique, said communication method in each of said devices comprising:
- a) listening to whether said channel is free or busy and if the channel is free, transmitting;
b) if the channel is busy, generating a random number and associating therewith a first interval of time to determine an instant to start transmitting;
said method further comprising the steps of;
if said channel is busy, identifying a second interval of variable time by monitoring data exchanged in said channel from other devices that occupy the channel; and
queuing a third interval of time obtained from said first interval of time onto said second interval of time and transmitting at an end of said third interval of time,said second interval of time being of a same duration as the time in which said channel remains in the busy state.
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Abstract
A method for performing wireless communication in a data-collection system includes a) listening whether a channel is free or busy and if the channel is free, transmitting; b) if the channel is busy, generating a random number and associating therewith a first interval of time to determine the instant of the start of transmission and further whether said channel is busy, identifying a second variable interval of time, monitoring the data exchanged in said channel with other devices that occupy the channel, queuing a third interval of time obtained from said first interval of time onto said second interval of time and transmitting at the end of said third interval of time. The second interval of time has a duration that is equal to the time wherein the channel remains in busy status.
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Citations
43 Claims
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1. A method for performing wireless communication in a data-collection system, said system comprising a plurality of devices communicating with one another over a single channel of a first data network, wherein access to said channel is based on a Carrier Sense Multiple Access (CSMA) data-transmission technique, said communication method in each of said devices comprising:
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a) listening to whether said channel is free or busy and if the channel is free, transmitting; b) if the channel is busy, generating a random number and associating therewith a first interval of time to determine an instant to start transmitting; said method further comprising the steps of; if said channel is busy, identifying a second interval of variable time by monitoring data exchanged in said channel from other devices that occupy the channel; and queuing a third interval of time obtained from said first interval of time onto said second interval of time and transmitting at an end of said third interval of time, said second interval of time being of a same duration as the time in which said channel remains in the busy state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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12. A method for performing wireless communication in a data-collection system assessing an efficiency of the communication, said system comprising a plurality of devices connected with one another over a single channel of a first data network, wherein access to said channel is based on a Carrier Sense Multiple Access (CSMA) data-transmission technique, said method in each of said devices comprising:
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a) monitoring said channel at least when said channel is busy; b) processing a physical signal monitored in said channel so as to assess whether a packet corresponds to said physical signal or whether said physical signal is corrupted; c) if said physical signal is not corrupted, decoding said monitored packet to identify the device of said first network sending the aforesaid packet; and d) assessing the efficiency of the wireless communication towards the sender device. - View Dependent Claims (13, 14, 15, 16)
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Specification