In this paper, we describe a General Packet Radio Service (GPRS) OPNET simulation model and the implementation of the Radio Link Control/Medium Access Control (RLC/MAC) and the Base Station Subsystem GPRS protocol (BSSGP). The RLC/MAC and BSSGP protocols are added to an existing GPRS OPNET model. We have enhanced the existing model by implementing unacknowledged mode of RLC and two phase access...

These days a massive deployment of VoIP is taking place over IP networks. VoIP deployment is a challenging task for network researchers and engineers. This paper presents a detailed simulation approach for deploying VoIP successfully. The simulation uses the OPNET network simulator. Recently OPNET has gained a considerable popularity in both academia and industry, but there is no formal or know...

In this paper, we describe an OPNET model of a General Packet Radio Service (GPRS) network. The model captures the signaling and transmission behavior of the GPRS network. We first introduce a GPRS network and describe the signaling and transmission procedures that will be modeled. In order to point out the simplifications made in the OPNET model, we then address the differences between the GPR...

Worldwide interoperability microwave access (WiMAX) is an 802.16 wireless standard that delivers high speed, provides a data rate of 100 Mbps and coverage area 50 km. Voice over internet protocol (VoIP) flexible offers low-cost telephony for clients IP. However, there are still many challenges must be addressed to provide stable good quality voice connection the internet. The performance variou...

High capacity networks are needed for enormous quantity of internet traffic, which is driven by both the exponential growth number people using and ongoing introduction new high-bandwidth requiring applications. Combining optical wireless technologies a promising access network solution. The energy efficiency telecommunication therefore attracting increasing attention today than in past. This s...