mac layer protocols for ad hoc wireless networks

... Channel MAC (P = 9) 0.14 0.08 0.08 0.07 0.14 to improve the performance of ad hoc networks In this paper, we model and simulate Channel MAC and show that Channel MAC can achieve higher performance ... Perreau, and L Rasmussen, “Channel MAC: a novel medium access control paradigm for wireless ad hoc networks, ” in Proceedings of the Australian Telecommunication, Networks and Applications Conference ... Exponential Fade Duration We assume arbitrary distributions for both nonfade and fade durations As a special case, we consider fixed l for nonfade duration and exponentially distributed fade duration...

Ngày tải lên: 21/06/2014, 22:20

... and M Krunz, “CDMA-based MAC protocol for wireless ad hoc networks, ” in Proceedings of the 4th ACM Interational Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc ’03), pp 153–164, Annapolis, ... before any node in the network runs out of its energy can, thus, be prolonged RELATED WORK There are some research works that have already been done on topology control for ad hoc wireless networks ... problem for nonhomogenous wireless networks SYSTEM MODEL We adopt the widely used transmission power model for raα dio networks, pi j = di, j , where pi j is the transmission power needed for node...

Ngày tải lên: 22/06/2014, 22:20

... discoveries, which is the most critical part of ad hoc wireless sensor networks EARP is well suited for sensor networks due to its ability to adapt to the environment and make routing decisions ... routing in ad hoc wireless networks, ” in Mobile Computing, vol 353, chapter 5, pp 153–181, Kluwer Academic, Boston, Mass, USA, 1996 [4] G Kunito, K Yamazaki, H Morikawa, and T Aoyama, “An ad- hoc routing ... Rappaport, Wireless Communications, Principles and Practice, Prentice-Hall, Upper Saddle River, NJ, USA, 1996 [13] A B McDonald and T Znati, “A path availability model for wireless ad- hoc networks, ”...

Ngày tải lên: 23/06/2014, 00:20

... 1.1 Ad hoc networking 1.2 The ad hoc wireless network: operating principles 1.3 Ad hoc networks: vulnerabilities 1.4 Ad hoc networks: security requirements 1.5 Quality of service 1.6 Further reading ... nature of ad hoc networks, a set of security requirements is subsequently presented The chapter also introduces the quality of service issues that are relevant for ad hoc networks 1.1 Ad hoc networking ... challenges for ad hoc networking The lack of fixed base stations in ad hoc networks means that there is no dedicated agency for managing the channel resources for the network nodes Instead, carefully...

Ngày tải lên: 25/03/2014, 12:07

... techniques in ad hoc wireless networks — part I Routing techniques in ad hoc wireless networks — part II Applications of ad hoc wireless networks Power management in ad hoc wireless networks Connection ... Power-Conservative Designs in Ad Hoc Wireless Networks Yu-Chee Tseng and Ting-Yu Lin Performance Analysis of Wireless Ad Hoc Networks Anurag Kumar and Aditya Karnik C oding for the Wireless Channel Ezio ... Techniques for Mobile Ad Hoc Networks Roberto Beraldi and Roberto Baldoni S atellite Communications Matthew N.O Sadiku Wireless Communication Protocols Pascal Lorenz 10 An Integrated Platform for Ad Hoc...

Ngày tải lên: 03/06/2014, 01:08

... pp 173–219, Addison-Wesley, Reading, Mass, USA, 2001 [2] D B Johnson, D A Maltz, and J Broch, “DSR: the dynamic source routing protocol for multi-hop wireless ad hoc networks, ” in Ad Hoc Networking, ... Madsen, F H P Fitzek, and R Prasad, “Impact of different mobility models on connectivity probability of a wireless ad hoc network,” in Proceedings of the International Workshop on Wireless Ad- Hoc ... Ad- Hoc Networks, pp 120–124, June 2004 [5] F Bai, N Sadagopan, and A Helmy, “Important: a framework to systematically analyze the impact of mobility on performance of routing protocols for adhoc networks, ”...

Ngày tải lên: 21/06/2014, 11:20

... Multi-Channel MAC protocols in ad hoc networks Research efforts in the field of access mechanisms for single-channel ad hoc networks have been extensive For example, a multiplicity of single-channel MAC protocols ... grows 15 25 G McMACT=200 MMACN=16 G McMACT=100 MMACN=10 SYN MACT=200 SYN MACN=16 20 SYN MACN=10 MMACT=200 10 G McMACN=16 Throughput (S) Throughput (S) SYN MACT=100 MMACT=100 G McMACN=10 15 10 10 ... Srinivasan, CAM -MAC: A Cooperative Asynchronous Multi-Channel MAC Protocol for Ad Hoc Networks, in 3rd International Conference on Broadband Communications, Networks and Systems, BROADNETS ‘06, 1–10...

Ngày tải lên: 20/06/2014, 22:20

... in ad hoc wireless networks, ” in Mobile Computing, T Imielinski and H F Korth, Eds., chapter 5, Kluwer Academic Publishers, Dodrecht, The Netherlands, 1996 [4] C E Perkins and E M Royer, Ad hoc ... routing algorithm in wireless sensor ad hoc networks The random ant-like unicast routing (RAUR) scheme is proposed and simulations were run to compare the network performance of networks running ... the RAUR has much better performance In Table shows the energy usage for different protocols As can be seen, RAUR outperforms the other protocols EURASIP Journal on Wireless Communications and...

Ngày tải lên: 21/06/2014, 17:20

... on information sharing among layers Figure illustrates this hierarchical model for the first three layers of the protocol stack: physical layer, MAC (data link) layer, and network layer As protocols ... H V Poor, Wireless Networks: Multiuser Detection in Cross -Layer Design, Springer, New York, NY, USA, 2005 [12] C Comaniciu and H V Poor, “QoS provisioning for wireless ad hoc data networks, ” ... challenges for energy-constrained ad hoc wireless networks, ” IEEE Wireless Communications, vol 9, no 4, pp 8–27, 2002 [15] V Kawadia and P R Kumar, “A cautionary perspective on cross -layer design,”...

Ngày tải lên: 22/06/2014, 19:20

... on information sharing among layers Figure illustrates this hierarchical model for the first three layers of the protocol stack: physical layer, MAC (data link) layer, and network layer As protocols ... H V Poor, Wireless Networks: Multiuser Detection in Cross -Layer Design, Springer, New York, NY, USA, 2005 [12] C Comaniciu and H V Poor, “QoS provisioning for wireless ad hoc data networks, ” ... challenges for energy-constrained ad hoc wireless networks, ” IEEE Wireless Communications, vol 9, no 4, pp 8–27, 2002 [15] V Kawadia and P R Kumar, “A cautionary perspective on cross -layer design,”...

Ngày tải lên: 22/06/2014, 22:20

... 1.1 The need for efficient resource discovery protocols in wireless ad hoc networks 1.2 The empty cell problem for grid based resource discovery protocols 1.3 ... Introduction 1.1 The need for efficient resource discovery protocols in wireless ad hoc networks Recent years have seen the explosion of wireless devices due to an increased need for connectivity: cell ... not feasible in large ad hoc networks where flooding could be harmful for the performances of the network [4] Therefore a trade off has to be found where nodes send some advertisements in specific...

Ngày tải lên: 05/10/2015, 21:22

... 802.11e MAC for QoS over wireless, in Proceedings of IEEE Performance, Computing, and Communications Conference (April 2003) P Nuggehalli, M Sarkar, RR Rao, QoS and selfish users: a MAC layer perspective, ... Traditionally, IEEE 802.11e MAC would provision for only HP traffic transmission during the CFP In our proposed MAC scheme, we advocate the introduction of transmission slots for LP traffic as well ... motivate the need for a fair MAC protocol, we first analyze a hybrid -MAC scheme which mimics the 802.11e MAC in every essential respect The analytical expressions attained for throughput and...

Ngày tải lên: 20/06/2014, 22:20

... scheduling algorithm where scheduling decisions are made based on system performance maximization instead of intracell performance maximization, as in for example, conventional PF scheduler The proposed ... simulator which simulates the scheduling, link adaptation, and physical layer for 32 frames time interval for 500 random user locations (drops) The performance of individual users is assessed by ... path-loss, shadow fading, and frequency selective fading in decibels and SNRtarget is the SNR target in decibels, here set to 26 dBm Fractional power control is beneficial in reuse-1 networks for better...

Ngày tải lên: 21/06/2014, 05:20

... Mudumbai, and U Madhow, “Distributed beamforming for information transfer in sensor networks, ” in Proceedings of the 3rd International Symposium on Information Processing in Sensor Networks (IPSN ... in MIMO relay networks, ” IEEE Transactions on Wireless Communications, vol 5, no 6, pp 1433–1444, 2006 A F Dana and B Hassibi, “On the power efficiency of sensory and ad hoc wireless networks, ” IEEE ... coefficients and to perform the phase synchronization scheme (for protocols B1 and B2) We plot the two extreme cases τ = NR and τ = and see that they lead to extremely different results for B2 and B1 This...

Ngày tải lên: 21/06/2014, 17:20

... environment and can achieve high spectral efficiency For this reason, OFDMA has emerged as one of the prime multiple access schemes for broadband wireless networks [1, 2] However, OFDMA does not possess ... Sons V Tarokh, N Seshadri, and A Calderbank, “Space-time codes for high data rate wireless communication: performance criterion and code construction,” IEEE Transactions on Information Theory, vol ... performance of the proposed schemes under jamming interference over frequency selective fading environments First, the system performance in jamming-free case is analyzed Second, the system performance...

Ngày tải lên: 21/06/2014, 20:20

... SIR for different values of cell radius Cdf 0.02 0.5 Inbuilding obstructed Outdoor shadowed urban area 0.4 0.3 0.2 0.1 −20 −10 configuration example for ad hoc networks The accessability radius, ... propagation models for mobile ad hoc NETworks (MANET) in urban area environment,” in Proceedings of the 2nd International Conference on Wireless Broadband and Ultra Wideband Communications (AusWireless ... fading This model is particularly important in studying the performance of selforganizing self-configuring networks For the interference scenario described in the system model, the path loss for...

Ngày tải lên: 21/06/2014, 22:20

... routing in ad hoc disaster recovery networks, ” Ad Hoc Networks, vol 1, no 4, pp 405–421, 2003 [7] Y Shibata, Y Sato, N Ogasawara, and G Chiba, “Ballooned wireless mesh network for emergency information ... integrating lowpower, wireless vital sign sensors, and PC-class systems In addition, Zussman and Segall propose to construct an ad hoc network of wireless smart badges in order to acquire information from ... algorithm for base station placement in wireless sensor networks, ” in Proceedings of the 4th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks...

Ngày tải lên: 21/06/2014, 23:20

... path-loss channel Therefore, in this paper, interference-based assignment for MC-CDMA multicell networks is proposed While there exists some limited work on MC-CDMA for multicell networks in the literature ... constraints for FPA and WFPA (BCRGA in use) where the throughput performance for code-limited scenarios at low load (i.e., K = 16) approaches that of the unlimited case since, at low load, most ... better performance at low load while BCRGA demonstrates superior performance at high load as shown in Figure 12 5.4 Discussions As discussed above, results show a large decline in performance...

Ngày tải lên: 22/06/2014, 00:20

... path-loss channel Therefore, in this paper, interference-based assignment for MC-CDMA multicell networks is proposed While there exists some limited work on MC-CDMA for multicell networks in the literature ... constraints for FPA and WFPA (BCRGA in use) where the throughput performance for code-limited scenarios at low load (i.e., K = 16) approaches that of the unlimited case since, at low load, most ... better performance at low load while BCRGA demonstrates superior performance at high load as shown in Figure 12 5.4 Discussions As discussed above, results show a large decline in performance...

Ngày tải lên: 22/06/2014, 06:20

... contribution of this paper is the proposal of a two-level call admission control scheme for DS-CDMA wireless networks and the evaluation of its performance The proposed scheme is discussed in the context ... possible for the inequalities (9) for new calls (or (10) for handoff calls) to be met, but the call cannot be made active due to physical resource (e.g., channel elements) shortage Instead of blocking ... results for class calls, the reverse is the case for the 2-level CAC scheme The uplink outage probabilities for class and class calls are similar for either CAC scheme Figures and are useful for...

Ngày tải lên: 22/06/2014, 19:20