Active buffer management algorithm for silence suppressed voice applications

This paper proposes silence drop first algorithm(SDF) for the active buffer management. This algorithm finds and drops silence packet rather than talkspurt packet in the queue for resolving buffer overflow of queue. This algorithm can serve more simultaneous user while maintain voice service quality with same link capacity. Simulations with voice codec of G.711 and G.729a are performed in this paper. The simulation results shows that SDF can serve more users than drop-tail and drop-head, whose are general active buffer management algorithms for voice application used in commercial and military router. By using proposed SDF algorithm, the voice capacity is increased by 84.21% with G.729a and 38.5% with G.711. Also, SDF algorithm loosens the silence packet inter-arrival time limit to service target number of users.