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Being one of the first 3G operators in the world with early UMTS experience, 3 were able to focus immediately on the UMTS opportunities and the challenges ahead, resulting in 3 being one of the early drivers for Multimedia Broadcast Multica...

The establishment of a typical 3G videotelephony (video calls) session is a process that lasts typically around 5 to 8 seconds between today's deployed 3G video-call enabled terminals. This delay is exclusive of call signalling, and is due ...

3G mobile system are designed to provide multimedia services. To fulfill QoS requirements for video applications, a robust video codec should be employed. In this paper, a robust and effective algorithm for Group of Blocks (GOB) Intra refre...

This paper proposes a Mobile Agent based Congestion Aware Routing (MACAR) protocol, for routing in Mobile Ad Hoc Networks (MANETs). Here mobile agents collect network connectivity information based on congestion state and disperse this info...

In cellular multi-hop networks relay stations (RSs) are used to forward transmissions between the base station (BS) and user equipment (UE). The power at which the RS transmits not only determines which UEs it can serve but also the spatial...

An ad-hoc network with a base station, a mobile and a third station acting as a relay is analysed. The channels are modelled using path loss, Rayleigh fading and thermal noise. Different combining methods and diversity protocols are compare...

Wireless sensor nodes run on small battery power and it is sometimes impossible to replace the batteries due to the environment and cost factors associated with them. Therefore, energy efficiency is a critical issue in the design and manage...

In this paper, we present routing algorithms for mobile ad-hoc networks, which exploit the mobility patterns of nodes to provide a robust and long-lived route to destination and reduce flooding and overhead in the network. In the proposed p...

Three algorithms to exploit the multi-user MIMO channel are examined and their system capacity evaluated in the uplink of a small urban cell scenario using measured channel data. An iterative scheme to determine transmit weights that achiev...

Several packet scheduling techniques for the downlink of a multiple-input multiple-output (MIMO) cellular system are investigated. The system capacity for three scheduling are investigated. The system capacity for three scheduling algorithm...