Abstract: A method is provided for processing a data packet on reception, where the data packet is transmitted by a first node to a second node over a link of a wireless electronic communications network. The packet includes a header and payload data. The method includes a step of receiving the data packet in two stages, a first stage of receiving the header and a second stage of receiving the payload data. The first stage includes the following steps performed by the second node on receiving a header of the data packet: detecting in the received preamble an authentication preamble for authenticating the link; using the data packet authentication preamble to authenticate the link; and in the event of the authentication having a positive result, deciding to trigger the second stage of receiving the payload data from the data packet.

Abstract: A method is provided for processing a data packet on reception, where the data packet is transmitted by a first node to a second node over a link of a wireless electronic communications network. The packet includes a header and payload data. The method includes a step of receiving the data packet in two stages, a first stage of receiving the header and a second stage of receiving the payload data. The first stage includes the following steps performed by the second node on receiving a header of the data packet: detecting in the received preamble an authentication preamble for authenticating the link; using the data packet authentication preamble to authenticate the link; and in the event of the authentication having a positive result, deciding to trigger the second stage of receiving the payload data from the data packet.

Abstract: A method is provided for communication between at least one source entity and one destination entity, in a cooperative network that includes a plurality of entities. The method includes a step of determining, for a given entity of the network, a temporal variation of an impulse response of a transmission channel established between the given entity and another entity. The method further includes: a step of determining a temporal variation of an impulse response of at least one global transmission channel intended to be established between the source entity and the destination entity and passing through at least one relay entity, on the basis of the temporal variations of the impulse responses of the transmission channels; and a step of selecting a global transmission channel from among the set of global transmission channels determined.

Abstract: Method of communication, on a radio channel in a network comprising a plurality of telecommunications nodes with which are associated respective values of a metric, including emitting, from a first node, a request on the radio channel, and subsequent to the receipt of the request by at least one second node, emitting a response message with a delay determined as a function of the metric value associated with said second node.

Abstract: The invention relates to a method of determining the presence of a telecommunications signal on a frequency band, said signal being assumed cyclostationary, comprising steps of: determining an energy vector {circumflex over (T)} (14) comprising m components respectively representative of energy values of an autocorrelation function of the signal received on said frequency band for m shift times, calculating correlation elements (15) between the m components of the energy vector {circumflex over (T)}, performing a statistical calculation (16) on the correlation elements calculated so as to determine a statistical indicator ?, comparing (17) the statistical indicator obtained ? with a predetermined threshold with the aim of determining the presence of a telecommunications signal on said frequency band.

Abstract: An unoccupied frequency band (W) is detected in a telecommunications network by obtaining first values relating to a signal received (r(n)) for respective corresponding times, in this frequency band. Next, a compound signal is obtained in the form of vectors (Yn) respectively associated with these first values, each vector having M components resulting respectively from the products of the first value associated with said vector and M second values relating to the signal received respectively for M offset times (ti) shifted with respect to the time corresponding to said first value, M being a greater integer. Next, at least one first and one second energy vector (EL, EH) are determined, each containing M components corresponding respectively to energy values of the compound signal for the M offset times, respectively on a first frequency band and on a second frequency band, which are situated either side of a reference frequency.

Abstract: A system and method organize a network of communicating objects in at least one partition comprising a plurality of communication cells respectively covered by a plurality of leader nodes, the network having a set of allocatable addresses split into a plurality of address pools distributively managed by the leader nodes. Upon a new node arrival, phase (a) and possibly phase (b) are executed. During phase (a), if the new node detects a leader node, it allocates an address from its managed address pool and the new node assumes a member node roll in the leader node cell. If the new node does not detect any leader node in its vicinity, it goes on to the phase (b), wherein, if the new node detects a first cell member node, it assumes the role of leader covering a second cell, obtains an available pool of managed addresses and is allocated one of the obtained addresses.

Abstract: A method is provided for communication between at least one source entity and one destination entity, in a cooperative network that includes a plurality of entities. The method includes a step of determining, for a given entity of the network, a temporal variation of an impulse response of a transmission channel established between the given entity and another entity. The method further includes: a step of determining a temporal variation of an impulse response of at least one global transmission channel intended to be established between the source entity and the destination entity and passing through at least one relay entity, on the basis of the temporal variations of the impulse responses of the transmission channels; and a step of selecting a global transmission channel from among the set of global transmission channels determined.

Abstract: The invention relates to a method of determining the presence of a telecommunications signal on a frequency band, said signal being assumed cyclostationary, comprising steps of: determining an energy vector {circumflex over (T)} (14) comprising m components respectively representative of energy values of an autocorrelation function of the signal received on said frequency band for m shift times, calculating correlation elements (15) between the m components of the energy vector {circumflex over (T)}, performing a statistical calculation (16) on the correlation elements calculated so as to determine a statistical indicator ?, comparing (17) the statistical indicator obtained ? with a predetermined threshold with the aim of determining the presence of a telecommunications signal on said frequency band.

Abstract: An unoccupied frequency band (W) is detected in a telecommunications network by obtaining first values relating to a signal received (r(n)) for respective corresponding times, in this frequency band. Next, a compound signal is obtained in the form of vectors (Yn) respectively associated with these first values, each vector having M components resulting respectively from the products of the first value associated with said vector and M second values relating to the signal received respectively for M offset times (ti) shifted with respect to the time corresponding to said first value, M being a greater integer. Next, at least one first and one second energy vector (EL, EH) are determined, each containing M components corresponding respectively to energy values of the compound signal for the M offset times, respectively on a first frequency band and on a second frequency band, which are situated either side of a reference frequency.

Abstract: A system and method organize a network of communicating objects in at least one partition comprising a plurality of communication cells respectively covered by a plurality of leader nodes, the network having a set of allocatable addresses split into a plurality of address pools distributively managed by the leader nodes. Upon a new node arrival, phase (a) and possibly phase (b) are executed. During phase (a), if the new node detects a leader node, it allocates address from its managed address pool and the new node assumes a member node roll in the leader node cell. If the new node does not detect any leader node in its vicinity, it goes on to the phase b). (b), wherein, if the new node detects a first cell member node, it assumes the role of leader covering a second cell, obtains an available pool of managed addresses and is allocated one of the obtained addresses.

Abstract: Method of communication, on a radio channel (4) in a network (1) comprising a plurality of telecommunications nodes (2) with which are associated respective values of a metric, comprising the following steps: /a/ emitting, from a first node, a request on the radio channel; /b/ subsequent to the receipt of the request by at least one second node (A), emitting a response message with a delay determined as a function of the metric value associated with said second node.