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The current IP network's gateway protocol of routing system can only provide the attainable services of data transmission and do not have the ability to regulating the use of the whole network, which causes the transmissive data streams of the network may gather on the same chain. Thus that can cause local server congestion at the network and the utilization of the network resource coming down. Form...
Open, decentralized networks such as Internet are increasingly heterogeneous and dynamic. Applications running over such networks must be able to cope with resource restrictions and operate under the most diverse conditions. Providing multiple services over the same network has enormous effect on scalability, performances and cost of this network. Selecting a proper concept of network for mass market...
Informing users about new resource assignments has to be broadcast, thus generating a substantial amount of the mapping overhead that influences the system throughput. In particular, the performance of voice-over-Internet protocol (VoIP) services is seriously affected by the mapping overhead because the VoIP packet size is small. In order to reduce the mapping overhead, a semi-fixed mapping scheme...
Packets are the basic unit of data transfer in the Internet. Each packet essentially consists of a header that carries network control information apart from the payload part that contains useful information meant for transmission. The size of the header depends on the associated protocol and these headers are an overhead in terms of processing and bandwidth utilization. As packet size decreases,...
The emergence of peer-to-peer (P2P) applications has posed a threat to the operating cost of Internet Service Providers (ISPs) due to the large amount of inter-ISP traffic generated. The problem stems from the mismatch between the P2P overlay network formed randomly and the underlying physical network. Recently, BitTorrent has attracted enormous users by its convenience of large-scale content distribution...
In recent years, with the information increasing rapidly, WDM communication network traffic is paid more and more attentions. Traffic engineering (TE) is an interesting application in IP-based networks. TE main objective is to optimize the performance of a network through an efficient utilization of network resources. This paper discusses traffic technology and load balancing in optical networks....
In this paper we propose a scalable admission control scheme for the QoS sensitivity traffic in core-stateless networks. In our scheme, the ingress routers perform admissibility test in a fully distributed and parallel fashion for requests by dint of our bandwidth dividing based virtual link mechanism. Then, we introduce a novel two phase token passing mechanism to adaptively optimize the proportion...
As communication networking becomes vital to people's digital life. Also, various communication protocols are evolved in e-service for e-business models. The main push factor behind this network evolution is the real time transfer of multimedia information, such as, audio, image and video. Several protocols, such as RTP (real time protocol) and RTCP (real time control protocol), are developed to facilitate...
In the Internet, with many competing networks each trying to optimise its own bandwidth, a stub network has limited knowledge about user demands, available network resources and routing policies of other networks. This uncertainty makes the task of interdomain traffic engineering for a stub network very challenging. The basic aim of a stub network connected to multiple ISPs (multihomed) is to load...
Because wireless stations independently select which access points to camp on, the total wireless station traffic on all available IEEE 802.11 network APs might be unevenly distributed. This load-balancing problem can lead to overloading and network congestion. This survey examines the problem, along with state-of-the-art network- and wireless-station-based solutions. It also presents experimental...
In wireless sensor networks, majority of routing protocols considered energy efficiency as the main objective and assumed data traffic with unconstrained delivery requirements. However, the introduction of image and video sensors demands certain quality of service (QoS) from the routing protocols and underlying networks. Managing real-time data requires both energy efficiency and QoS assurance in...
End-to-end (e2e) quality of service (QoS) is the key target to be achieved in order to successfully support high quality real-time services. While ISDN, SDH and ATM provide service classes that natively support constant bit-rate transmission tunnels, i.e. provide circuit switching that offers constant bandwidth for the entire duration of a service, packet switched technologies natively do not provide...
This paper presents an integrated routing and MAC scheduling protocol (IRMA) for multihop wireless mesh networks. The IRMA approach is motivated by the fact that the overall performance achieved by conventional layered approaches (802.11 MAC combined with independent ad hoc routing protocols) is significantly lower than the underlying network capacity. We propose to integrate the routing and MAC into...
In this paper a novel data gathering framework for resource-constrained sensor networks is introduced and evaluated. The introduced framework consists mainly of two phases. Initially, due to the lack of infrastructure, a simple bridging technique is used to create a multi-hop tree rooted at the collection center. In the second phase, a distributed and probabilistic method is applied by the various...
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