TIME DOMAIN MEDIUM ACCESS CONTROL PROTOCOLS FOR UNDERWATER ACOUSTIC NETWORKS

... is an investigation of time domain medium access control (MAC) protocols, specifically those based on Medium Access Collision Avoidance (MACA), for Underwater Acoustic Networks (UAN) A review ... ii TIME DOMAIN MEDIUM ACCESS CONTROL PROTOCOLS FOR UNDERWATER ACOUSTIC NETWORKS SHIRAZ SHAHABUDEEN (B.Eng., NUS, M.Tele.Eng., University of Melbourne) A THES...

Ngày tải lên: 10/09/2015, 08:39

... aware multiaccess protocol with signaling for ad hoc networks,” ACM SIGCOMM Computer Communication Review, vol 28, no 3, pp 5–26, 1998 P802.11, “Ieee standard for wireless lan medium access control ... transmission time for each TRFR message comply with a uniform distribution, and carrier sensing is done before sending Since hidden problem is accessible for our system, the per...

Ngày tải lên: 22/06/2014, 22:20

... slot scheduling algorithm performs well in static networks, but lacks support for dynamic network Self-Organizing Medium Access Control for Sensor Networks (SMACS) [30] protocol assigns a locally ... 22 EURASIP Journal on Wireless Communications and Networking [22] W Ye, J Heidemann, and D Estrin, Medium access control with coordinated adaptive sleeping for wireless...

Ngày tải lên: 21/06/2014, 11:20

... DESIGN OF MEDIUM ACCESS CONTROL TECHNIQUES FOR COOPERATIVE WIRELESS NETWORKS WANG YU (B Eng., Huazhong University of Science and Technology, China) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR ... delivered in a 1.1 Cooperative Medium Access Control Figure 1.2: System model for centralized networks Figure 1.3: System model for distributed networks 1.1...

Ngày tải lên: 09/09/2015, 09:59

... Underwater MAC Protocols We first focus on the existing underwater handshaking- based MAC protocols; then, we shall briefly describe some proposals for non -handshaking protocols Handshaking- based MAC protocols ... benchmarking protocol for more advanced underwater handshaking- based MAC protocols We aim to enhance channel utilization of handshaking- base...

Ngày tải lên: 09/09/2015, 18:49

... a theoretical analysis for the energy consumption of MAC protocols and the underlying physical layer This analysis can be used for the study of Multihop MAC for WSNs: An Energy Analysis Model ... the energy consumption showing that medium access control consumes almost orders of magnitude more energy than in the analysis without medium access control Th...

Ngày tải lên: 23/06/2014, 00:20

... Aloha and TCP, use this kind of information for the rate control Current proposals for medium access protocol in sensor networks make use of randomized controllers The study of performance and ... There exists a constant C such that for any π ∈ Π, there is an observation r for which π − F[π, g(π), r] ≥ , for all < ≤ C, and for any norm · Proof This basically means that...

Ngày tải lên: 23/06/2014, 00:20

... alternative to time domain equalizers is their frequency domain counterparts Frequency domain equalizer for OFDM with insufficient CP are covered in [26; 27; 28] Among the frequency domain equalizers ... reflection point for the signal induced by the surface waves [31] Figure 2.1: Cyclic Prefix inserted at the front of an OFDM symbol in time domain Figure 2.1 sho...

Ngày tải lên: 13/10/2015, 15:56

... SURVEY OF AD HOC ROUTING PROTOCOLS 28 3.2.4 Ad Hoc On-Demand Distance Vector Routing The Ad Hoc On-Demand Distance Vector (AODV) [6] routing protocol enables dynamic self-starting multi-hop routing ... Since most mobile ad hoc networks are battery-operated systems, they are energy and bandwidth constrained Power and energy efficient design becomes one of...

Ngày tải lên: 26/11/2015, 10:49

... Window Immediate access when medium is idle >= DIFS DIFS PIFS SIFS Busy Medium Defer Access Backoff Window Next Frame Slot Time Select Slot and decrement backoff as long as medium stays idle ... DPSM for multi-hop MANETs that use asynchronous clocks 3.2.3 Power control medium access control (PCM) Previous approaches of power control used alternating sleep and wake states f...

Ngày tải lên: 28/04/2014, 13:40

... Access Router nAR: new Access Router MR: Mobile Router CN: Correspondent Node MNN: Mobile Network Node RMR: Root Mobile Router (b) The path before route optimization The path after route optimization ... hierarchy-based route optimization schemes [11,12] support route optimization for interdomain routing, a non-optimal route is formed when the CN and the MNN are loca...

Ngày tải lên: 21/06/2014, 00:20

... energy efficiency 3 Vector-Based Forwarding Protocol (VBF) In this section, we present our vector-based forwarding (VBF) protocol and its enhanced version, hop-by-hop vector-based forwarding (HH-VBF) ... packet and continues forwarding the packet; otherwise, it simply discards the packet In this way, all the packet forwarders in the sensor network form a “routing pipe”: the sen...

Ngày tải lên: 21/06/2014, 17:20

... packet Therefore, data packets are piggybacked to update buffer state When a sensor x sends out a data packet, it piggybacks its residual-buffer size in the frame header If a neighbor y overhears ... the next hop node’s transport buffer Nodes maintain a queue at the transport layer and Faisal B Hussain et al forward a single packet from it during their allocated slots Packet delivery...

Ngày tải lên: 21/06/2014, 23:20

... pp 171–180, Los Angeles, Calif, USA, November 2003 [18] G Lu, B Krishnamachari, and C S Raghavendra, “An adaptive energy-efficient and low-latency MAC for data gathering in sensor networks, ” in Proceedings ... The channel access is managed by means of the carrier sense multiple access with collision avoidance (CSMA/CA) scheme, as specified in [19] Before transmitting a packet toward...

Ngày tải lên: 22/06/2014, 19:20