Dynamic Bandwidth Allocation in GMPLS Optical Networks using Minimum Execution Time Technique

A new dynamic bandwidth allocation technique named as Minimum Execution Time (MET) is developed for reducing the blocking probability to improve quality of service of the Generalized Multi Protocol Label Switched (GMPLS) optical network. A statistical model of an optical network is developed for blocking probability of held calls and cleared calls. The bandwidth is allocated to users on the basis of predictable completion intervals at the servers in the proposed technique for bandwidth allocation, i.e. it calculates the minimum time required to execute the request so that bandwidth can be allocated to another user. Thus, the bandwidth can be allocated in an efficient manner in this process. The blocking probability variation is studied based on the traffic load and wavelengths available at the time of user request in the GMPLS network. The results revealed that the blocking probability drops off with increasing number of available wavelengths. The value of blocking probability remains below 1% by using the proposed bandwidth allocation technique.