Thomson Licensing

Georgios Sotiropoulos

Theodoros Salonidis

Roch Guerin

Ramesh Govindan

A method is intended for computing online channel loss rate and collision loss rate of at least one communication link established between nodes (N, N) of a network (WN) using a random access MAC protocol. This method comprises the steps of i) dividing time in probing windows and transmitting a chosen number S of probe packets during each probing window from a transmitter node (N) to a receiver node (N) linked therebetween, ii) measuring a packet loss rate from probe packets lost on this communication link during a probing window, iii) scanning each probing window with smaller sliding windows, each having a size Wk smaller than S, to identify the sliding window during which only channel losses occur, and then for computing a channel loss rate on this communication link from this identified sliding window, and iv) computing a collision loss rate on this communication link by subtracting the computed channel loss rate from the measured packet loss rate.

Device and method for computation of channel loss rate and collision loss rate of communication link(s) in a random access network

A method is intended for computing online a feasible rates region in a network using a random access MAC protocol and comprising nodes having links there between. This method comprises the steps of i) determining, for each link, a primary extreme point corresponding to a maximum output rate when this link transmits alone at a maximum input rate, and ii) determining secondary extreme points by combining these primary extreme points with a chosen interference model, these primary and secondary extreme points defining a boundary of a feasible rates region.

Device and method for online computation of the feasible rates region of a random access network

A method is intended for computing online channel loss rate and collision loss rate of at least one communication link established between nodes of a network using a random access MAC protocol. This method comprises the steps of i) dividing time in probing windows and transmitting a chosen number S of probe packets during each probing window from a transmitter node to a receiver node linked therebetween, ii) measuring a packet loss rate from probe packets lost on this communication link during a probing window, iii) scanning each probing window with smaller sliding windows, each having a size Wk smaller than S, to identify the sliding window during which only channel losses occur, and then for computing a channel loss rate on this communication link from this identified sliding window, and iv) computing a collision loss rate on this communication link by subtracting the computed channel loss rate from the measured packet loss rate.

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Athens, Greece

Georgios Sotiropoulos