Patent ID: 7983183

Claim:
A method for measuring a transmission quality in terms of lost packets between two pre-determined nodes arranged to transmit and receive packets in a packet mode communication network, said method comprising the steps of: providing each node with a counter, whereby each node is able to reset the counter on the other node; counting transmitted packets in one node and received packets in the other node during a pre-determined period of time, wherein the step of counting comprises the steps of: setting a testbit in each transmitted packet in order to indicate to the receiving node that the packet has been counted in the transmitting node, whereby the receiving node increases the counter for each received packet where said testbit is set; and, setting said testbit to zero after the pre-determined period of time has ended in order to indicate to the receiving node that the received packet has not been counted on the transmitting node comparing the counters after the pre-determined period of time has ended in order to obtain a packet loss measurement, wherein the step of comparing comprises the step of sending a message including the counter value from the receiving node to the transmitting node when packets with said test bit set to zero have been received for a pre-determined period of time.