Non Uniform Cache Architectures (NUCA) are a new design paradigm for large last-level on-chip caches and have been introduced to deliver low access latencies in wire-delay dominated environments. Their structure is partitioned into sub-banks and the resulting access latency is a function of the physical position of the requested data. Typically, NUCA caches make use of a switched network to con...

Network Mobility (NEMO) is concerned with managing the mobility of an entire network and included one or more Mobile Routers (MRs) which are connected as gateways to the Internet. This paper proposes the optimal handoff decision mechanisms, not only avoiding the ‘ping-pong effect’ and frequent handoffs, but also reducing handoff latency under multi-hop network mobility. The simulation results d...

The emerging high-speed broadband packetswitched networks are expected to simultaneously support a variety of services with different Quality-of-Service (QoS) requirements over the same physical infrastructure. Fair packet scheduling algorithms used in switches and routers play a critical role in providing these QoS guarantees. Deficit Round Robin (DRR), a popular fair scheduling discipline, is...

In active networks, programs can be injected to network elements (routers/switches). This allows programmers to enhance existing protocols or deploy new protocols. AMTree protocol is an active network based protocol that makes sending packets to receivers, after source migration, an efficient process. In AMTree protocol, after source migration, handoff latency computed from the time of reconnec...

Application layer multicast (ALM) provides a low-cost solution for multicast over the Internet. It overcomes the deployment hurdle of IP multicast by moving all multicast related functions from network routers to end-hosts. However, since packet replication is performed on end-hosts, the system performance of an ALM is limited by the bandwidth of end-hosts. Therefore, degree-constrained QoS-awa...

In a tree-based ZigBee network, ZigBee routers (ZRs) must schedule their beacon transmission times to avoid beacon collisions. The beacon schedule determines packet delivery latency from the end devices to the ZigBee coordinator at the root of the tree. Traditionally, beacon schedules are chosen such that a ZR does not reuse the beacon slots already claimed by its neighbors, or the neighbors of...

Active networks (ANs) are a new paradigm in computer networking. In ANs, programs can be injected into routers and switches to extend the functionalities of the network. This allows programmers to enhance existing protocols and enables the rapid deployment of new protocols. Little work has been done in the area of multicast routing in heterogeneous environments. In this paper, we propose AMTree...