Báo cáo hóa học: " Adaptive QoS Routing by Cross-Layer Cooperation in Ad Hoc Networks" pptx

... paths and QoS constraints. In this paper, we propose a cross-layer cooperation mech- anism to support adaptive multipath routing with multiple QoS constraints in an ad hoc network. The cross-layer ... scheme supported by cross-layer cooperation in ad hoc networks. The cross-layer mechanism provides up-to-date local QoS information for the adaptive rout...

Ngày tải lên: 23/06/2014, 00:20

... mechanism in joint leasing and sensing-based CRNs. Keywords: cognitive radio networks, joint leasing and sensing, non-preemptive mechanism, QoS tradeoff 1. Introduction Cognitive radio (CR) has ... quality-of-service (QoS) of secondary users (SUs) in joint leasing and sensing-based cognitive radio networks (CRNs). In this spectrum-sharing mechanis m, a primary user (PU) could not forc...

Ngày tải lên: 20/06/2014, 22:20

... TCP source inactivity T after receiving an attack can be obtained as in T = ∞  i=1 t i ·Pr ( T = t i ) . (21) 3.7. Obtaining the TCP Inactivity Percentage due to the Lion Attack. We can assume an inactivity ... hasbeenprogrammedinmatlabandrunwith the parameters given in Section 4.1.Table2 provides the average inactivity time T and inactivity percentage U inactivity obtained for the analy...

Ngày tải lên: 21/06/2014, 11:20

... Publication by George Karagiannidis Mobile ad hoc network is an autonomous system of mobile nodes characterized by wireless links. The major challenge in ad hoc networks lies in adapting multicast ... mobile nodes. In recent years, a number of unicast routing protocols have been proposed. Multicasting routing and packets for- warding in ad hoc networks is a fairly...

Ngày tải lên: 23/06/2014, 00:20

... in stance, studi es have included indicators measuring optimism, mastery and self-esteem, but often exclude finding meaning. To our knowledge, only in two s tudies the effect of finding meaning was ... h caution since not adaptation but adaptive abilities are studied here. Adaptive abilities explained 46% of the variance in mental health, which in turn explained between 11 - 18% o...

Ngày tải lên: 20/06/2014, 15:20

... signaling over- head caused by the existing one in IEEE 802.16e, which further improves the packet-level QoS performance and resource efficiency for uplink transmission. e) Performing adaptive QoS ... admission control for polling services in IEEE 802.16 broadband wireless networks, in Proc of IEEE Int Conf on Commun. 12, 5540–5545 (June 2006) 7. H Yao, GS Kuo, A QoS -Adaptive...

Ngày tải lên: 21/06/2014, 00:20

... receives the RREP, it inserts the routing information about D into its routing table and uses this routing information to send data to D. Instead of blindly searching for the route in the entire network, ... develop a routing algorithm that can meet WSNHA requirements while minimizing the routing overhead. 4. Routing Algorithm In AODVjr routing, when a source node S has data...

Ngày tải lên: 21/06/2014, 05:20

... sensor nodes in the process of network operation, routing can be divided into flat routing and clustering routing. Clustering routing first appears in cable network, and it is also adaptable for ... guaranteed by self -adaptive retransmitting mechanism. In ReInforM, the transmission reliability and routing load are guaranteed by multirouting and random retransmitting mechani...

Ngày tải lên: 21/06/2014, 17:20

... classes. We increase the channel load by increasing the packet size of CBR MPEG4 traffic from 600 bytes (2.4 Mbps) to 1000 bytes (4 Mbps) using a 100 bytes increment and keeping the same interarrival ... methods to increase the channel load: increasing the node number and increasing the packet size. The latter is selected for increasing the channel load in this simulation. It is a time-cons...

Ngày tải lên: 22/06/2014, 01:20

... kbps, and 128 kbps by choosing appropriate encoding mecha- nisms. Similarly, video applications can be made rate adap- tive by using, for instance, a layered coding method. In layer coding method, the ... class-i) call into RAT- j after adapting (degrad- ing) the bandwidth of existing call(s). In the departure epoch, the bandwidth adaptation unit makes the decision to adapt (upgrade)...

Ngày tải lên: 22/06/2014, 19:20