This paper focuses on the wireless communication aspect of the traffic control problem in urban areas. The IEEE 802.11b standard is used and an architecture is developed that produces zero packet loss at vehicle speeds of up to 60 Km/hr. A quantitative comparison is made between the Mobile Internet Protocol v4 (MIPv4) and MIPv6. It is shown that MIPv6 produces much less packet losses than MIPv4. Burst communication is then used to eliminate packet losses completely and the interpacket and inter-burst intervals are determined. Finally, the effects of the Router Advertisement Interval (RAI) and the Mobility Detection Factor (MDF) are investigated and the optimum parameter values are determined in the context of the traffic control problem.

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This paper investigates the problem of inter-cell interference (ICI) in Long Term Evolution (LTE) mobile systems, which is one of the main problems that causes loss of packets between the base station and the mobile station. Recently, different frequency reuse methods, such as soft and fractional frequency reuse, have been introduced in order to mitigate this type of interference. In this paper, minimizing the packet loss between the base station and the mobile station is the main concern. Soft Frequency Reuse (SFR), which is the most popular frequency reuse method, is examined and the amount of packet loss is measured. In order to reduce packet loss, a new hybrid frequency reuse method is implemented. In this method, each cell occupies the same bandwidth of the SFR, but the total system bandwidth is greater than in SFR. This will provide the new method with a lot of new sub-carriers from the neighboring cells to reduce the ICI which represents a big problem in many applications and causes a lot of packets loss. It is found that the new hybrid frequency reuse method has noticeable improvement in the amount of packet loss compared to SFR method in the different frequency bands. Traffic congestion management in Intelligent Transportation system (ITS) is one of the important applications that is affected by the packet loss due to the large amount of traffic that is exchanged between the base station and the mobile node. Therefore, it is used as a studied application for the proposed frequency reuse method and the improvement in the amount of packet loss reached 49.4% in some frequency bands using the new hybrid frequency reuse method.

This paper presents the evolution of Aircraft Data Networks (ADN)'s. It describes various Avionics data network protocols based on the Avionics systems architecture. The paper describes the evolution from a simple point-to-point protocol presented in ARINC 429 to a shared data bus protocol presented in ARINC 629. Finally, the new Data network based on AFDX (Avionics Full-duplex Ethernet) is discussed. AFDX is a new standard based on Ethernet technology and able to handle today's requirements. A brief comparison between the three different protocols is presented. The comparison shows that AFDX provides better performance and flexibility without losing the compliance with safety, redundancy and reliability of Avionics requirements General TermsAvionics Data Buses, protocols.

This paper addresses the issue of traffic control in a vehicular environment. Data exchanged between vehicles and the infrastructure is based on the Stigmergic approach. WiMAX (IEEE Std 802.16e) is used for Infrastructure to Vehicle (I2V) communication. An architecture is proposed with the aim of minimizing packet loss. OPNET simulations are used to optimize this architecture for different Inter-Packet Transmission times as well as several vehicle speeds. An expected increase in performance is observed when comparing with similar work based on a modified WiFi communication scheme for I2V. In order to further increase system performance, Dual Trigger Handover (DTH) is used and OPNET simulations indicate that DTH reduces packet loss by up to 29%.