In stateless core (SCORE) networks, edge routers maintain per flow state while core routers do not. Core stateless fair queuing (CSFQ) has been proposed for approximating the operation of per-flow queuing techniques in SCORE networks. However, the packet dropping probability offered by CSFQ suits only UDP flows. Thus, CSFQ cannot achieve fair bandwidth allocation for TCP flows. This paper propo...

The prime objective of the EPSRC-funded OPSnet project is the design and demonstration of an asynchronous DWDM optical packet switch (OPS) capable of directly carrying IP packets over DWDM-based core networks at transport rates in the order of 100 Gb/s and above. To achieve such an objective demands a highly flexible and innovative core switch architecture. The operation and performance of such...

End-to-end fairness guarantee is an important service semantics that network providers would like to offer to their customers. A network provider can offer such service semantics by deploying a network where each router employs a fair packet scheduling algorithm. Unfortunately, these scheduling algorithms require every router to maintain per-flow state and perform per-packet flow classification...

This paper covers new optical packet switching router technologies, system architectures, and the future photonic Internet. In particular, we will discuss all-optical label switching routers scalable to 42 Petabit/sec switching capacity, experimental demonstrations of 11 hop cascaded operation, and a 477 km fiber link field trial. Introduction Optical packet switching routers allow integration ...

In stateless core (SCORE) networks, edge routers maintain per-flow state while core routers do not. Core stateless fair queuing (CSFQ) has been proposed for approximating the operation of per-flow queuing techniques in SCORE networks. However, the packet dropping probability offered by CSFQ suits only UDP flows. Thus, CSFQ cannot achieve fair bandwidth allocation for TCP flows. This paper propo...

Evolved Packet System (EPS) presents the EPS evolution of the 3G/UMTS standard introduced by the 3rd Generation Partnership Project (3GPP) standard committee. Interworking issues between EPS and IEEE 802.11 networks will become a new challenging problem. In this paper, we propose a fast seamless handoff scheme using a optimized PMIPv6 between IEEE 802.11 (WiFi) and EPS networks, without modifyi...

Today’s voice and data communication networks are converging towards integrated, packetoriented multi-service NGNs. Although first NGN solutions are already provided to customers in the access network (e.g. integrated phone/DSL access), the architectural design of NGNs in the metro and core environment is still under heavy development. The voice and data network convergence together with the st...

Wireless sensor networks (WSNs) consist of sensor nodes that onward the sensed data in form of packets within the deployed network. Efficient packet forwarding is a key constraint in sensor networks and many demanding tasks in the network, together with redundancy estimation and sensor node localization depend principally on packet forwarding. Location based forwarding schemes have recently evo...

The conventional direct device discovery scheme which uses the random access protocol and encounters contentions or collisions is highly energy time-consuming. To reduce consumption of user equipments (UEs), this work proposes a two-phase hybrid mechanism for device-to-device (D2D) communications. In first phase, evolved packet core (EPC) base station (BS) location information UEs to judge whet...

CDMA (code-division multiple-access) is a data transmission method based on the spreading code technology, where in multiple data streams share the same physical medium with no interference. A novel architecture for on-chip communication networks based on this approach is devised. The proposed design allows sharing coding resources among network’s users through the use of dynamic assignment of ...