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A novel routing architecture that balances incoming traffic over the Agile All-Photonic Network (AAPN) is proposed. The architecture is based on the adaptive highest random weight (Adaptive HRW) algorithm proposed to design load balanced internet routers. It extends the adaptive HRW algorithm by assigning balancing weights to each source-destination edge node pair in the network. The weights are adapted...
A temporary resource reservation mechanism can enhance the performance of a stateless PCE in situations when the TED might not be up-to-date. This paper examines the benefits of such a mechanism by means of simulation.
Virtual routers on commodity hardware are an attractive solution for service providers that look for extensibility, flexibility, reuse and low deployment cost. However, these routers still suffer from performance limitations due to the virtualization overhead and the commodity hardware architecture itself. In this paper, we first evaluate the baseline forwarding performance of virtual routers based...
This paper presents a trust-based QoS management implementation to assure trust and security of the IP network. In this architecture, every IP packet is forwarded and queued by its trust-value, which is the quantification of the network's expectation of this packet's behavior in networks. We also outlined the deployment of the trusted routers which carry out this algorithm. At last we provide the...
High-speed routers rely on well-designed packet buffers that support multiple queuing, large capacity and short response times. Some researchers suggested a combined SRAM/DRAM hierarchical buffer architecture to meet these challenges. However, both the SRAM and DRAM need to maintain a large number of dynamic queues which is a real challenge in practice and limits the scalability of these approaches...
The future Internet is envisioned to host a large number of virtual networks managed by different operators sharing the same physical infrastructure. In such a scenario, an operator may not even own physical resources as such, but lease virtual resources to have their own virtual networks. While control-plane virtualization with several routing instances becomes common in equipments, the data plane...
The inherent support in routers (SNMP counters or NetFlow) is not sufficient to diagnose performance problems in IP networks, especially for flow-specific problems and hence, the aggregate behavior within a router appears normal. To address this problem, in this paper, we propose a Consistent NetFlow (CNF) architecture for measuring per-flow performance measurements within routers. CNF utilizes NetFlow...
The choice of routing algorithm plays a vital role in the performance of on-chip interconnection networks. Adaptive routing is appealing because it offers better latency and throughput than oblivious routing, especially under non-uniform and bursty traffic. The performance of an adaptive routing algorithm is determined by its ability to accurately estimate congestion in the network. In this regard,...
Network delay is a major design parameter for Networks-on-Chip (NoC)-based applications. Improving NoC delay could be achieved at different design phases. At the system level, we study in this paper the impact of the network topology on NoC system delay using graph-theoretic concepts. A topology-based model is developed to calculate the average NoC delay, which is caused by links and routers. The...
The Internet growth coupled with the variety of its services is creating an increasing need for multicast traffic support by backbone routers and packet switches. Recently, buffered crossbar (CICQ) switches have shown high potential in efficiently handling multicast traffic. However, they were unable to deliver optimal performance despite their expensive and complex crossbar fabric. This paper proposes...
In the tactical Internet, inter-domain links consist mostly of unreliable and low bandwidth wireless links. To enable seamless routing across different Autonomous Systems (ASes), we propose an inter-domain Traffic Engineering (TE) scheme to reroute traffic when congestion occurs. There are two components for the TE scheme. First, a Traffic Splitting (TS) scheme is used for load balancing among parallel...
In this paper, we propose a novel load-balanced scheme-split aggregated flow (SAF) and design the buffering mechanism for two-stage self-routing switch. By grouping the signal lines with concentrators, the proposed scheme can obtain the statistical multiplex gain and reduce the complexity of computation. The mathematical analysis and simulations show that 100% throughput can be achieved for any admissible...
This paper designs a PCE-based architecture of routing, and proposes two distributed signaling schemes in PCE-based wavelength switching optical network (WSON). Simulation results based on the topology of Chinese core network are given and analyzed.
When dynamic service interconnection requests are managed by a centralized system (e.g., a network management system - NMS), the time required for the connections to be fully operational might be heavily impacted by the policy utilized to serve them. The policies must be devised for mitigating issues that increase this time, such as commercial router irresponsiveness to configuration commands during...
Novel network architectures with distributed service components on both routers and end-systems have been proposed to provide the necessary flexibility in the next-generation Internet. Such architectures allow services to be composed along the data path to satisfy different communication requirements. A major operational challenge in such systems is to determine where to perform the required services...
With the line rate growing faster and faster, input queued switching architecture has become attractive in high performance switches and routers due to the no speedup character. In this paper, a simple efficient queue balance matching (QBM) algorithm is presented supporting cells with multiple output ports based on the multi-hop routing. The QBM algorithm combines the virtue of iSLIP and EiSLIP, and...
DTN (delay-tolerant network) is a network model which is abstracted from many examples of networks in recent years. In this network model, a long period of network division happens frequently, so in a given time a period of end-to-end path does not exist. As DTNpsilas this unique topology nature, the traditional network architecture and routing mechanism is no longer applicable. If the information...
The problem of providing quality of service (QoS) in the Internet stems from the original choice of a datagram packet switching service model for the Internet protocol (IP). Since, in principle, each packet can take any path to the destination, it is impossible to provide any absolute guarantees about service. This paper presents a scheme using traffic engineering techniques and implements policy...
The path computation element architecture has been proposed to separate forwarding and routing functionality in small-scale connection-oriented networks, such as MPLS, GMPLS, and ASON. If routing is performed by dedicated units, more sophisticated methods, such as multi-constraint QoS routing, may be implemented than currently widespread practices (i.e. OSPF, IS-IS, BGP, etc.). In this paper, we present...
Routing policies in traditional networks are based on interactive mechanisms that consider a permanent simultaneous communication between the source and the destination nodes. In addition, the metrics associated to these networks (throughput, end-to-end delay, jitter, etc.) are based on this assumption. Systems deployed in challenging environments are faced to intermittent connectivity as a consequence...
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