Loading patent…
AssigneeThomson Licensing
InventorsTheodoros Salonidis, Henrik Lundgren, Pascal Le Guyadec, Rafael Laufer
Estimating the term…
A processing device equips a controller that is intended for providing data transmission schedules into multi-slot frames, based on a conflict graph representative of wireless links between nodes that interfere when transmitting simultaneously on a same radio channel, for nodes linked therebetween and belonging to a multi-hop wireless network using a MAC protocol supporting a slotted access. This processing device comprises a processing means arranged, during each frame, for updating the conflict graph from interference information provided by the nodes during this frame, and for refining this conflict graph from detection of hidden interferer nodes based on detected failures of data transmissions of the links between these nodes during at least the previous frame.
1-15. (canceled)
Processing device for a central controller intended for providing data transmission schedules into multi-slot frames, based on a conflict graph representative of wireless links between nodes that interfere when transmitting simultaneously on a same radio channel at given data rates, for nodes finked therebetween and belonging to a multi-hop wireless network using a MAC protocol supporting a slotted access, wherein said processing device comprises a processing means arranged, during each frame, for updating said conflict graph from interference information provided by said nodes during said frame, and for refining said conflict graph from detection of hidden interferer nodes based on detected failures of data transmissions of the links between said nodes during at least the previous frame.
Device according to claim 8, wherein said processing means is arranged for determining for said set of failing links for which a data transmission failure has been detected, a set of hidden interferer nodes that represent transmitter nodes which are at least at a chosen number of hops away from the receiver node of each failing link, and then adding an edge into said conflict graph between each vertex corresponding to a failing link and the vertices whose corresponding links have as transmitter nodes the nodes in said determined set of hidden interferer nodes.
Network equipment defining a node for a multi-hop wireless network using a MAC protocol supporting a slotted access, wherein it is arranged, for each multi-slot frame comprising a measurement phase, a computation phase and a data transmission phase, for measuring a chosen interference information during said measurement phase, for measuring a feedback information representative of failures of data transmissions between said nodes during said data transmission phase, and for transmitting said chosen interference information and measured feedback information obtained in a previous multi-slot frame during said measurement phase of said multi-slot frame.
Method for transmitting data in a multi-hop wireless network using a MAC protocol supporting a slotted access and comprising nodes linked therebetween and a controller intended for providing said nodes with schedules for transmitting data into multi-slot frames, based on a conflict graph representative of wireless links between nodes that interfere when transmitting simultaneously on a same radio channel using certain data rates, wherein, for each current frame comprising a measurement phase, a computation phase and a data transmission phase, it comprises the steps of:
Dependencies are inferred from the claim text.