xxxx/xx Vol. Jxx A No. xx DCF DCF [9], [10] [5] DSR [2] [5], [6] DCF DCF DCF [5] [7] DCF [9] [11] DCF IEEE DCF DCF [5] DSR DCF DCF 2. IEEE 802.
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1 LAN An Analysis on Influence of Control Messages of Ad Hoc Routing Protocols upon Link Trougput in Wireless LAN Ryoji ONO, Tatsuji MUNAKA, and Takasi WATANABE DSR MAC IEEE DCF DCF LAN DCF DCF DSR [1/m 2 ] DSR DCF DSR IEEE DCF 1. Information Tecnology R & D Center, Mitsubisi Electric Corporation, Ofuna, Kamakura, Kanagawa, Japan Faculty of Informatics, Sizuoka University, Jooku, Hamamatsu, Sizuoka, Japan [4] IEEE LAN [1] [5], [6], [8] MAC DCF Distributed Coordination Function PCF Point Coordination Function 2 PCF DCF DCF CSMA/CA Carrier Sense Multiple Access wit Collision Avoidance A Vol. Jxx A No. xx pp xxxx xx 1
2 xxxx/xx Vol. Jxx A No. xx DCF DCF [9], [10] [5] DSR [2] [5], [6] DCF DCF DCF [5] [7] DCF [9] [11] DCF IEEE DCF DCF [5] DSR DCF DCF 2. IEEE DCF DSR DSR IEEE DCF IEEE [1] MAC 2 DCF PCF DCF DCF CSMA/CA RTS/CTS request-to-send/clear-to-send 2 RTS/CTS DIFS DCF inter-frame space RTS/CTS SIFS sort inter-frame space ACK RTS/CTS DIFS RTS RTS SIFS CTS RTS SIFS RTS/CTS [9] 2. 2 IEEE DCF IEEE DCF Cen [10] g M T p 2
3 LAN normalized trougput S single op multi op packet arrival rate g [pkt/slot] 1 DCF M = 10, T p = 32 Fig. 1 Trougput of DCF (M = 10, T p = 32) M 1 Cen [10] M = 10 T p = 32 [bytes] 1 g S M DSR DSR [2] DSR RREQ RREQ RREQ 1 [11] RREQ RREP RREQ RREQ RREQ RREP Caced RREP RERR RERR RREQ Broc [5] DSR 4 [6], [7] DSR 3. Cen [10] DSR Li [14] µ DSR p d [8] DSR g r p d µ v p d N ρ g r v ρ g a g Cen 3
4 xxxx/xx Vol. Jxx A No. xx [10] g DCF S v ρ DSR g r S 3. 1 [12], [13] 2 Li [14] 2 [15] µ r ū µ = 2ū πr (1) v 2 u θ v u = v 2 2v cos θ = 2v sin θ 2 (2) ū u θ ū = π 0 {2v sin(θ/2) 2π sin θ} dθ π 0 2π sin θ dθ = 4 3 v (3) µ = 8v 3πr 3. 2 (4) p d DSR 2 [15] 1 n l p d µ p d = n l µ (5) 2 p d N/2 N p d = N 2 p d = N 2 n lµ = 4N n lv 3πr 3. 3 (6) g r DSR RREQ RREP RERR g r DCF RREQ RREP RERR 3 p req p rep p err G r [8] G r = p req Nδ req + p rep n rep + p err n (7) N n n rep RREP δ req Caced RREP RREQ n r RERR 1 n r p err p d n r RREQ RERR p req p err RREQ 1 RREP δ rep p rep δ rep p req 2 DSR 3 4
5 LAN G r = (Nδ req + δ rep n rep + n ) n r p d (8) G r g r αg r = Ng r (9) [10] ρ A N = ρa g r g r = α N G r = α N (Nδ req + δ rep n rep + n ) n r p d 4α(ρAδreq + δrep nrep + n ) n l n rv = (10) 3πr Caced RREP δ req 1 δ rep 1 ρa = N n > n rep ρaδ req + n ) g r (δ rep n rep g r 4αA n l n r ρv (11) 3πr g r ρ v g g g a g r g = g a + g r (12) g a g Cen [10] DCF S DSR DCF LAN 10 g r v ρ 2 S 4. 1 [8], [10], [11] 1 A 25 [m] T p Cen [10] T p [6] RREP RTS/CTS RTS/CTS [10] RTS/CTS DSR RREQ RTS/CTS Cen [10] RTS/CTS 4. 2 Caced RREP Caced RREP 1 Table 1 Parameters r 25 m A ( ) m 2 n 3 n l 3 n r 2 1 Mbps α 20 µsec γ 2 µsec T p ( n ) bytes PHY 24 bytes MAC 28 bytes RTS 44 bytes CTS 38 bytes ACK 38 bytes SIFS 10 µsec DIFS 50 µsec CW min 31 CW max 1023 m 5 5
6 xxxx/xx Vol. Jxx A No. xx trougput against offered load S/G g a = g a = g a = g a = trougput against offered load S/G g a = g a = g a = g a = node speed v [m/sec] node density ρ [1/m 2 ] 2 Fig. 2 Trougput against node speed 3 Fig. 3 Trougput against node density (1) Caced RREP Caced RREP δ req 1 δ rep 1 11 a ) v 2 S S G S/G G 9 g M = ρπr 2 α G = M α g = ρπr2 α g (13) 2 ρ [1/m 2 ] 4 g a g a > = v S/G 1 g > m [pkt/sec] [kbps] g a < = v < = 1 S/G 1 v > 1 S/G v > 4 g a g r b ) ρ S/G 3 v = 1 [m/sec] g a ρ g a g a ρ S/G g a =
7 LAN trougput against application trougput g a = g a = g a = g a = node density ρ [1/m 2 ] 4 Fig. 4 Trougput against node density (2) ρ 4 ρ = ρ = c ) ρ v S/G 5 g a g a g r ρ < = v < = 10 v = 10 36km ρ v ρ > = v < = 1 v = 1 3.6km ρ v ρ = v trougput against offered load S/G node speed v [m/sec] ρ = ρ = ρ = ρ = ρ = ρ = ρ = Fig. 5 Trougput against node speed and density ρ > = v ρ = v Caced RREP Caced RREP δ req 1 δ rep 1 10 δ req δ rep n rep 2 DSR Caced RREP [17] ρ v S/G 6 ρ < = v < = 10 ρ > = v < = Table 2 Parameters (2) δ req δ rep 10.4 n rep
8 xxxx/xx Vol. Jxx A No. xx trougput against offered load S/G node speed v [m/sec] ρ = ρ = ρ = ρ = ρ = ρ = ρ = Fig. 6 Trougput against node speed and density ρ = v Caced RREP ρ > = v ρ = v 4. 3 A r ρ > = [1/m 2 ] ρ = [1/m 2 ] v = 1 10 [m/sec] DSR DCF MAC DSR ρ < = m m a ) [5], [6] b ) RTS/CTS [6] RTS/CTS c ) DSR AODV [3] DSR [5], [6] d ) e ) DSR 6. IEEE DCF DSR [14] [8] DSR DCF [10] [1/m 2 ] 8
9 LAN DSR DCF DSR [1] IEEE standard for wireless LAN medium access control (MAC) and pysical layer (PHY) specification, ISO/IEC :1999, Aug [2] D. Jonson, D. Maltz, and Y. Hu, Te dynamic source routing protocol for mobile ad oc networks, draft-ietf-manet-dsr-10.txt, Jul [3] C. Perkins, E. Belding-Royer, and S. Das, Ad oc on-demand distance vector (AODV) routing, RFC 3561, Jul [4] IEEE standard for wireless LAN medium access control (MAC) and pysical layer (PHY) specification: ESS mes, ttp://grouper.ieee.org/groups/802/11 /Reports/tgs update.tm. [5] J. Broc, D. Maltz, D. Jonson, Y. Hu, and J. Jetceva, A performance comparison of multi-hop wireless ad oc network routing protocols, Proc. ACM/IEEE MobiCom 98, pp.85 97, Dallas, USA, Oct [6] C. Perkins, E. Royer, S. Das, and M. Marina, Performance comparison of two on-demand routing protocols for ad oc networks, IEEE Personal Communications, vol.8, no.1, pp.16 28, Feb [7] T. Kullberg, Performance of te ad-oc on-demand distance vector routing protocol, Helsinki University of Tecnology Seminar on Internetworking, HUT T , Espoo, Finland, Apr [8] vol.45 no.12 pp Dec [9] S. Kurana, A. Kaol, S. Gupta, and A. Jayasumana, Performance evaluation of distributed co-ordination function for IEEE wireless LAN protocol in presence of mobile and idden terminals, Proc. IEEE MASCOTS 99, pp.40 47, College Park, USA, Oct [10] Y. Cen, Q. Zeng, and D. Agrawal, Performance of MAC protocol in ad oc networks, Proc. CNDS 03, pp.55 61, Orlando, USA, Jan [11] J. Yin, Q. Zeng, and D. Agrawal, Performance evaluation of distributed coordination function in ideal and error-prone cannel, Proc. CNDS 04, pp.55 61, San Diego, USA, Jan [12] J. Tsumoci, K. Masayama, H. Ueara, and M. Yokoyama, Impact of mobility metric on routing protocols for mobile ad oc networks, Proc. IEEE PACRIM 03, pp , Victoria, Canada, Aug [13] X. Perz-Costa, C. Bettstetter, and H. Hartenstein, Toward a mobility metric for comparable and reproducible results in ad oc networks researc, ACM Mobile Computing and Communications Review, vol.7, no.4, pp.58 60, Oct [14] X. Li, and Q-A. Zeng, Modeling and analysis of multi-op wireless and mobile ad oc networks using te IEEE DCF protocols, Proc. ICWN 04, pp , Las Vegas, USA, Jun [15] Q-A. Zeng, and D. Agrawal, Modeling and efficient andling of andoffs in integrated wireless mobile networks, IEEE Trans. Veicular Tecnology, vol.51, no.6, pp , Nov [16] LAN MBL vol.2005 no.28 pp Mar [17] D. Maltz, J. Broc, J. Jetceva and D. Jonson, Te Effects of On-Demand Beavior in Routing Protocols for Multi-Hop Wireless Ad Hoc Networks, IEEE J. Selected Areas on Communications, vol.17, no.8, pp , Aug req rep n rep δ req δ rep n rep [17] [17] VII VIII Caced RREP RREQ RREP Caced RREP RREQ OgReq N F wreq N RREP OgRep N F wrep N Caced RREP OgReq C F wreq C OgRep C F wrep C 1 RREQ RREQ RREQ Caced RREP RtReq N RtReq C RtReq N RtReq C = OgReqN +F wreq N OgReq N = OgReqC +F wreq C OgReq C (A 1) (A 2) δ req Caced RREP Caced RREP RREQ 9
10 xxxx/xx Vol. Jxx A No. xx δ req = RtReqC RtReq N = (OgReqC +F wreq C ) OgReq N (OgReq N +F wreq N ) OgReq C (A 3) [17] VII VIII δ req = ( ) (A 4) ( ) 776 δ rep RREQ RREP IEEE δ rep = OgRepC OgReq C (A 5) [17] VIII δ req = 8077/ (A 6) Caced RREP RREP n rep n rep = OgRepC +wrep C OgRep C (A 7) [17] VIII n rep = ( )/ (A 8) xx xx xx OS/ IEEE 10
11 Abstract In on-demand ad oc routing protocols suc as DSR, control messages tend to increase as te mobility and te number of nodes increase. On te oter and, it is reported tat te trougput of IEEE DCF, wic is often used as te MAC layer in ad oc networks, is remarkably deteriorated wen idden nodes exist. We investigate ow muc control messages of routing protocol exert on te trougput wen idden nodes exist, in order to clarify quantitatively conditions were te ad oc networks using DCF are practical. In tis paper, we analyze te influence on trougput by te control messages of DSR numerically. As a result, we found tat te DSR control messages does not affect trougput if te node density is very low. Key words DSR, control messages, IEEE DCF, trougput, idden terminals
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