Wireless mesh networks o er many advantages in terms of connectivity and reliability. They provide multiple paths between nodes and are self healing. Traditionally, wireless mesh networks were used with nodes equipped with a single radio. There are however, limitations in single radio wireless mesh networks, such as lower throughput and its limited use of the available wireless channels. This r...

Cognitive radio network and vehicular ad hoc network (VANET) are recent emerging concepts in wireless networking. Cognitive radio network obtains knowledge of its operational geographical environment to manage sharing of spectrum between primary and secondary users, while VANET shares emergency safety messages among vehicles to ensure safety of users on the road. Cognitive radio network is empl...

The increasing popularity of sensor network has spawned a wide range of platforms and frameworks for sensor network development. While in theory nodes based on different frameworks should provide radio stack compatibility, in practice this is rarely the case. We explore this problem by providing a case study and introduce TinySPOTComm, a customized radio stack for the Sun SPOT platform which al...

[1] 3GPP TR 21.905 V11.2.0 (2012-09) Vocabulary for 3GPP Specifications [2] 3GPP TR 23.882 V8.0.0 (2008-09) 3GPP System Architecture Evolution: Report on Technical Options and Conclusions [3] 3GPP TS 22.278 V12.1.0 (2012-06) Service requirements for the Evolved Packet System (EPS) [4] 3GPP TR 25.912 V11.0.0 (2012-09) Feasibility study for evolved Universal Terrestrial Radio Access (UTRA) and ev...

This paper addresses the problematic of congestion control in the radio access interface when considering the allocation of voice and data services over several Radio Access Technologies (RATs). In particular, the GSMIEDGE Radio Access Network (GERAN) and the UMTS Terrestrial Radio Access Network (UTRAN) are considered for the evaluation of congestion control strategies. After a congestion situ...

We present joint radio selection and relay scheme that delivers data from a source to a sink in heterogeneous stationary sensor networks consisting of various radio interfaces. The proposed scheme finds the optimal relay nodes and their corresponding radio interfaces that minimize energy consumption throughout the network while satisfying the end-to-end packet deadline requirement. We formulate...

Multiple hop routing in mobile ad hoc networks can minimize energy consumption and increase data throughput. Yet, the problem of radio interferences remains. However if the routes are restricted to a basic network based on local neighborhoods, these interferences can be reduced such that standard routing algorithms can be applied. We compare different network topologies for these basic networks...

If only good coverage is required in GSM networks, high frequency reuse factors can be used. In that case the network capacity is directly determined by the number of available time slots, and no advanced radio control algorithms are needed. If high capacity is required and fractional loading is used in GSM networks, advanced radio resource management algorithms are required. Sophisticated netw...

Harris Corporation has an interest in making HF radios a suitable medium for wireless information networks using standard Internet protocols. Although HF radio links have many unique characteristics, HF wireless subnets can be subject to many of the same traffic flow characteristics and topologies as existing line-of-sight (LOS) radio networks, giving rise to similar issues (media access, conne...