A New QoS Management Scheme for VoIP Application over Wireless Ad Hoc Networks

Table 2

Simulation and protocol parameters.

Simulation parameter	Value or protocol
Simulator	Ns-2.35
Simulation hardware	Intel C2, 2 GHz, 4 GB RAM
Simulation time	500 s
Simulation warm-up time	100 s
Transmission range	100 m
Fading model	Shadowing
Topology model	Random
Call duration	30 s
Protocol parameter	Value
Routing protocol	OLSR (3626)/OLSR-VA
PHY/MAC protocol	802.11b
Transport protocol	RTP/UDP
Buffer size	100 packets, drop-tail queuing
Application layer	Ns2voip++
Voice codecs	ITU-T codecs standard
Talkspurt/silence periods	Weibull distribution
Default OLSR-VA parameter	Value
HELLO interval	3 s
TC interval	5 s
Willingness	3
LVA	False
NVA	False
NRTE_TRESH	100