Method and device for wireless communication between connected objects and gateways
OwnerHenri CROHASinventor
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Abstract
Methods of communication in a wireless communication network having a plurality of connected objects, a gateway and a central server. These elements communicate with one another via messages sent and received on frequency channels. A channel is reserved for the periodic transmission of tag messages by the gateways, thereby allowing the organization and optimization of the network usage and communication time.
Claims27
A communication method in a wireless communication network using a plurality of channels each having a central frequency and a bandwidth, said network comprising a plurality of connected objects and at least one gateway, said connected objects and the at least one gateway being able to transmit and receive messages in each of the channels, at least one of these channels, called beacon channel, being a one-way communication channel reserved for the periodic or quasi-periodic transmission of beacon messages by the gateways, said beacon messages comprising:
- a preamble;
- either an indication that the gateway wants to deliver a message or that it is able to receive at least one message;
- an indication of at least one channel for exchanging at least one message;
- method by which,
- A) a connected object transfers a message to a gateway by executing the following steps:
- 1) listening to the beacon channel or channels to detect at least a part of at least one beacon message;
- 2) selection of a gateway transmitting a beacon message perceptible by the connected object;
- 3) reception of the beacon message transmitted by the selected gateway and verification, by the connected object, that this gateway is able to receive a message;
- 4) transmission of a message by the connected object to the selected gateway over at least one channel indicated in the beacon message;
- and/or
- B) a connected object receives a message from a gateway by executing the following steps:
- 1) listening to the beacon channel or channels to receive at least one beacon message;
- 2) verification by the connected object that the gateway wants to deliver a message to said connected object;
- 3) reception of a message by the connected object over at least one channel indicated in the beacon message.
A communication method in a wireless communication network using a plurality of channels each having a central frequency and a bandwidth, said network comprising a plurality of connected objects and at least one gateway, said connected objects and the at least one gateway being able to transmit and receive messages in each of the channels, at least one of these channels, called beacon channel, being a one-way communication channel reserved for the periodic or quasi-periodic transmission of beacon messages by the gateways, said beacon messages being transmitted in time windows specific to each gateway and comprising:
- a preamble;
- either an indication that the gateway wants to deliver a message or that it is able to receive at least one message;
- an indication of at least one channel for exchanging at least one message;
- method by which,
- A) a gateway transmits, in its time window, a signal transporting a beacon message;
- B) a gateway receives at least one message from a connected object:
- 1) the gateway listens to the channel or channels assigned in the beacon message to detect a message:
- 2) the gateway receives the message or messages;
- and/or
- C) a gateway sends at least one message to at least one connected object over the at least one channel indicated in the beacon message.
A communication method in a wireless communication network using a plurality of channels each having a central frequency and a bandwidth, said network comprising a plurality of connected objects and a set of gateways, said connected objects and said gateways being able to transmit and receive messages in each of the channels, at least one of these channels, called beacon channel, being a one-way communication channel reserved for the periodic or quasi-periodic transmission of beacon messages by the gateways, said beacon messages being transmitted in time windows specific to each gateway and comprising:
- a preamble;
- either an indication that the gateway wants to deliver a message or that it is able to receive at least one message;
- an indication of at least one channel for exchanging at least one message;
- method by which a time window is associated with a gateway by executing the steps of:
- A) listening, by the gateway to the beacon channel or channels during at least one entire period of transmission of beacon messages;
- B) either, the gateway detects at least a part of a preamble and at least one time window is available, the gateway chooses one of these windows and the gateway transmits its beacon message;
- C) or, the gateway detects at least a part of a preamble and no time window is available, the gateway set to standby;
- D) or the gateway detects no preamble, it chooses a time window and it transmits its beacon message.
Dependencies are inferred from the claim text.