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IEEE 802.11 wireless local area network (WLAN) has become popular and has been providing excellent solution for wireless networking. With the popularity of WLAN and Voice over the Internet (VoIP) protocol, it is very essential to measure the performance of the VoIP over WLAN. The main goal of this paper is to compare the performance of the Voice over IP protocol in both LAN (802.3) and WLAN (802.11). This paper examines how this communication protocol performs in two different network setups and analyzes the results obtained using OPNET modeler. It also examines the optimization of 802.11e for Quality of Service (QoS) using the priorities to provide real-time service for voice over the Internet protocol.

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New System-on-Chip (SoC) design techniques are necessary to address the communication requirements for future SoC. The currently used Bus-Centered approach becomes an inappropriate choice because of its limitation as a shared medium that restricts the scalability of the communication architecture. Also, long bus wires result in performance degradation due to the increased capacitive load. The long wires also consume more power to drive all of Intellectual Property Cores, IP Cores, on the bus. New communication architecture, the NoFPGA (Network-on-FPGA), for future SoFPGA (System-on-FPGA) has been presented. The paper details the architecture of a NoFPGA router. The interconnecting issues in SoC design methodology built in a single FPGA device are addressed. Mainly, the problem of achieving efficient NoFPGA performance through investigating the best topology is addressed. Results of the work show that the 2D Torus NoFPGA outperforms the 2D Mesh NoFPGA.