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In wireless networks, bandwidth is likely to remain a scarce resource. We foresee scenarios wherein mobile hosts will require simultaneous data transfer across multiple links to obtain higher overall bandwidth. A call request of a connection in a wireless network is blocked if there exits no bandwidth route. This blocking does not mean that the tot...
Contexts in source publication
Context 1
... that a QoS connection is required to be established between a source node s and a target node t. = --. l ij denotes the link between node i and j. The residual bandwidth and cost of l ij are represented by b ij and c ij respectively. Fig. 4 shows an example in which node E forwards a request message with a band- width requirement of 10 units to node A. After receiving the request, node A has to de- termine which nodes in its set of neighbors should be selected as forwarding candidates and how many units of bandwidth need to be allocated to each selected link. In this ex- ...
Context 2
... message with a band- width requirement of 10 units to node A. After receiving the request, node A has to de- termine which nodes in its set of neighbors should be selected as forwarding candidates and how many units of bandwidth need to be allocated to each selected link. In this ex- ample, there are three nodes in the set of neighbors of node A. Fig. 4 (a). A example of forwarding a request message using splitting algorithm ...
Context 3
... bandwidth requirement split to l AC is 4 and the bandwidth re- quirement split to l AB is 10 − 4 = 6 units. Therefore, the first split request with a band- width requirement 4 is forwarded to node C, and the second split request with bandwidth requirement of 6 is forwarded to node B. The results of request splitting and forwarding are shown in Fig. 4 (c). Fig. 4 (c). An example of forwarding a request message using splitting algorithm ...
Context 4
... requirement split to l AC is 4 and the bandwidth re- quirement split to l AB is 10 − 4 = 6 units. Therefore, the first split request with a band- width requirement 4 is forwarded to node C, and the second split request with bandwidth requirement of 6 is forwarded to node B. The results of request splitting and forwarding are shown in Fig. 4 (c). Fig. 4 (c). An example of forwarding a request message using splitting algorithm ...
Context 5
... 4, 1, respectively. Therefore, the first split request with a bandwidth requirement of 5 is forwarded to node B. The second split request with a bandwidth requirement of 4 is forwarded to node D. Finally, the third split request with a bandwidth requirement of 1 is forwarded to node C. The results of request splitting and forwarding are shown in Fig. 4 (d). ...
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A Mobile Ad Hoc Networks (MANETs) is a collection of mobile nodes that can communicate with each other using multihop wireless links without utilizing any fixed based station infrastructure and centralized management. It is very necessary for MANETs to have an efficient routing and quality of service (QoS) mechanism to support diverse applications. Multipath routing allows the establishment of multiple paths between a single source and single destination node. This paper discusses the Multipath routing problem of MANETs with multiple QoS constraints, which may deal with the delay, bandwidth and reliability metrics, and describes a network model for researching the routing problem. It presents a Node-Disjoint Multipath routing protocol with multiple QoS constraints (NDMRP). The NDMRP successfully solves the QoS routing problems when nodes change dynamically in the networks. It only requires the local state information of the link (or node), but does not require any global network sate to be maintained. It can effectively decrease the overhead for the network lifetime, and improve the success ratio of seeking links. Simulation results show that the NDMRP provides an available means to implement routing, and adapt to all kinds of the topology networks, and have better expansibility.
