Fuzzy Traffic Rate Controller (FTRC) for Mobile Ad hoc Network Routers

Characteristics of mobile ad hoc networks such as lack of central coordination, mobility of hosts, dynamically varying network topology, and limited availability of resources make QoS provisioning very challenging in such networks. The FTRC consists of two sections. The first section, which is Fuzzy AIMD, uses additive increase multiplicative decrease (AIMD) rate control algorithm as base. In AIMD, the node increments its transmission rate with increment rate of c Kbps and decreases its transmission rate by r percent. Fuzzy AIMD accepts the packet delay and the "delaythreshold d" as inputs and calculates the c and r by using a set of fuzzy rules. The second section is Fuzzy Regulation, which selects a set of flows that have a major part in causing congestion, and otifies the corresponding sources to reduce their sending rates. The selection of flows is done according to the parameters "flow priority" and "the difference between actual rate and agreed rate" .

کلیدواژه ها:

QoS ، Mobile Ad hoc Network ، Fuzzy Control ، Traffic Management