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Resource Allocation in Wireless Networks Using Directional Antennas

This paper presents a novel QoS routing protocol designed for TDMA-based Mobile Ad Hoc Networks (MANETs) that leverages directional antennas to enhance spatial reuse and reduce end-to-end delay. The proposed protocol incorporates a bandwidth reservation mechanism, allowing nodes equipped with Multi-Beam Adaptive Array (MBAA) antennas to send data simultaneously in multiple directions while managing slot allocation effectively. The simulation results demonstrate significant improvements in QoS for multimedia and real-time applications, highlighting the potential benefits of directional antenna technology in wireless networks.

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Resource Allocation in Wireless Networks Using Directional Antennas

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  1. Resource Allocation in Wireless Networks Using Directional Antennas Imad Jawhar,Jie Wu IEEE PERCOM 2006

  2. Outline • Introduction • Proposed protocol for QoS routing • Simulation • Conclusion

  3. Bottleneck Flow1 c e j Flow2 Flow3 Introduction • QoS in MANET is an essential component that is needed to support multimedia and real-time applications. • Spatial reuse is a very important factor in wireless network.

  4. Introduction • Directional antenna technology provides the capability for considerable increase in spatial reuse. • Multi-Beam Adaptive Array (MBAA) Antenna • Power Saving • Spatial reuse • Send simultaneously at multiple directions. B B A A MBAA Antenna C C D D

  5. Motivation and Goal • Proposed a bandwidth reservation protocol for QoS routing in TDMA-based MANETusing directional antennas. • Goal: Reduce end-to-end delay. b Flow1 c e i j Flow2 n Flow3

  6. Network Environment • All nodes are static. • Each node equips MBAA antenna and keeps track of the slot status information of its 1-hop and 2-hop neighbors. • Angular groups in MBAA antenna. • ={13,14} , ={14,15}

  7. Rule for Slot Allocation • All beams can transmit or receive, but transmitting and receiving not allow simultaneously. B C A A B Not allowed C

  8. Rule for Slot Allocation • The same angle of beam problem. • When z-->w • z--/->y • x--/->w • x--/->y x w y z x y z w

  9. Proposed protocol for QoS routing • QREQ packet • QREP packet • QREP(S, D, id, b, PATH, NH) Destination Source The session id QREQ(S, D, id, b, x, PATH, NH) Number of slots required A list of next hop information, including hosts and slots The Host forwarding the message A list of demand route, including hosts and slots.

  10. Example p • Node a to node b and p. • Route: a—b—h • Node d to node b. QREQ (a,h,1,1,b,{(a,S1),(b,S2)},(h,S2)) a b QREQ (a,h,1,1,a,{(a,S1)},(b,S1)) d QREQ (d,b,2,1,d,{(d,S1)},(b,S1)) h R S S R R S {14,15} {6,7} {2,3} {14,15} {8,9} {6,7} {1,16} {10,11}

  11. Simulation

  12. Simulation Data Message 10MB Data Message 100MB

  13. Conclusion • This paper proposed a protocol for TDMA-based bandwidth reservation for QoS routing in MANET using directional antennas. • Reduce end-to-end delay.

  14. Thank you

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