reliable multisource multicast routing protocol over manet speaker: wu, chun-ting advisor: ke,...
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RELIABLE MULTISOURCE MULTICAST ROUTING PROTOCOL OVER MANET
Speaker: Wu, Chun-Ting Advisor: Ke, Kai-Wei
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Outline
1. Introduction2. Efficient Expanding Ring Search (ERS)3. Mobility Prediction (MP)4. Virtual Mesh (VM)5. Bidirectional multicast data delivery
(BMD)6. Numerical Results7. Future works & Conclusions
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1. Introduction
My Research – Reliable Multisource Multicast Routing Protocol (RMMRP)
Motivation Improve the efficiency of Multisource
multicast over MANET Objective
Reduce control overhead More stable topology Fast recovery
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MAODV Review
Data Delivery Process Unicast Multicast
Group Managements Join Leave Repair Merge
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Unicast Delivery
Source
Destination
RREQ
Source
Destination
RREP
Source
Destination
Data
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Multicast Delivery
Leader Source Leader Source
Source broadcast RREQsto find the group leader
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Multicast Delivery
Leader Source Leader Source
The data passed to Leader and flooded to the tree
Leader respond a RREP
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Join
Group Leader
member
router
join node
Broadcast Join RREQ across network
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Join
Group Leader
member
router
join node
Members respond with RREPs
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Join
Group Leader
member
router
join node
Send a MACT back
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Join
Group Leader
member
router
join node
Become a member
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Leave
Group Leader
member
router
leaving node
Send a MACT to Parent
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Leave
Group Leader
member
router
leaving node
Leave the group
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Repair Link breakage
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Merge Partition
Group Leader 1
Group Leader 2
MGL1Group Hello
RREQ
(1)
RREP
(2)
RREQ (3)
RREQ (4)
RREP (5)
RREP (6)
RREQ/RREP Message
Group Hello Message
MGL2
Group Leader
Group Member
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Proposed RMMRP
Methodology Apply ERS to reduce RREQ overhead Modify MP to reduce recovery frequency Propose VM to speed up topology recovery Propose BMD to support fast multicast data delivery
• Join• RepairRREQ
• Reply• PermissionRREP
• Establish• PruneMACT
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2. Efficient Expanding Ring Search (ERS) – 1
Expanding Ring Search [8]
Motivation Reduce RREQ
overhead Objective
Power-saving Avoid channel
contentions as possible
TTL concept applied
S
D
S
D
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ERS – 2
Efficient Expanding Ring Search [11]
Collect local topology information Reduce the overhead of pure flooding
E
B
A
C
DE
B
A
C
D
Relay: falsePredAddr: A
Relay: falsePredAddr:
Relay: falsePredAddr: A
Relay: falsePredAddr: A
Relay: falsePredAddr:
Relay: falsePredAddr: A
Relay: truePredAddr:
Relay: falsePredAddr: A
Relay: falsePredAddr: A
Relay: falsePredAddr: B
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ERS – 3
E
B
A
C
D
E
B
A
C
D
Relay: falsePredAddr: A
Relay: truePredAddr:
Relay: truePredAddr: A
Relay: falsePredAddr: A
Relay: falsePredAddr: B
Relay: falsePredAddr: A
Relay: truePredAddr:
Relay: truePredAddr: A
Relay: falsePredAddr: B
Relay: falsePredAddr: B
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ERS – 4
A → B → D
E
B
A
C
D
Relay: falsePredAddr: A
Relay: truePredAddr:
Relay: truePredAddr: A
Relay: falsePredAddr: B
Relay: falsePredAddr: B
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3. Mobility Prediction (MP)
Motivation Establish a stable routing path
Objective Cluster concept Reduce possibility of repairing
GPS supported
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Link Expiration Time
A (Xa, Ya) B (Xb, Yb)
Ta Tb
VaVb
ba
bbaa
ba
bbaa
ab
YYs
TVTVr
XXq
TVTVp
whererp
qrpsTxrprspqLET
sinsin
coscos
,)()()(
22
2222
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Mobility Prediction Example23
LET: Link Expiration Time The amount of time that a
certain link will remain connected
RET: Route Expiry Time The minimum of the LET
values of all links on a path
Two paths A-B-C-D
RET=8 A-E-D
RET=1 Select path with larger RET
A
D
C
EB
9
8
9
2
1
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Join Procedure (modified for stable)
MAODV RREP: <R_Flag,
U_Flag, Dest_Addr, Dest_Seq, Hop_Cnt, Lifetime, Mgroup_Hop, Group_Leader_Addr>
Mgroup_Hop indicates the distance of the tree
Lifetime is a constant
RMMRP RREP: <R_Flag,
U_Flag, Dest_Addr, Dest_Seq, Hop_Cnt, Lifetime, Group_Leader_Addr>
Lifetime means the expiration time of the path from tree
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Join Procedure (modified for topology stability)
Group Leader
Members respond with RREPs including the LET
Group Leader
member
router
join node
Join node send a MACT along the longest RET path
5
7 5
25
3
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Root Recovery
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Root Recovery
rte_discovery_timeout = 1 sec
rreq_retries = 2 times
MAODV’s root recovery takes at least 3 sec on waiting
Merging several partitions takes lots of time as well
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4. Virtual Mesh (VM)
Group HelloCandidate Leader: MC
Current Leader
MA MC MB
Multicast Tree Link
Mesh Link
Sub-tree Sub-tree Sub-tree
Group Leader
Group Member
Candidate LeaderMC MA
RREQ
(1)
RREQ/RREP Message
MB
RREP (4
)
RREQ (1)
RREP (2)
RREQ (1)
RREP (2)
Group Leader Group Member
RREQ (2)RREP (3
)
Network Node
RREQ (1)
RREP (2)
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VM Example 1
12
3
12
3
1
2
3
Group Leader
Candidate Leader
New partition leader
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VM Example 2 – 1
AB
C
Group Hello: Candidate=A
Current Leader
CandidateA
D E
B
C
F
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VM Example 2 – 2
A
D E
B
C
FMACT_GLA
D
E
B
C
F
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5. Bidirectional multicast data delivery
Multicast Reverse Path Forwarding
Degree↑Delay↓
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Bidirectional multicast data delivery
Leader Source Leader Source
Members respond RREPs back to Source
Source broadcast RREQsto find the group member
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Bidirectional multicast data delivery
Leader Source
Source first send the data to that member, andthe member deliver data by RPF
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Benefits
More stable tree topology Reduce the control overhead Fast root recovery
ERS
MP
VM
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6. Numerical Results
Parameter Value
Simulation time 300s
Play ground 1000*1000m2
Nodes (network size) 10, 20, 30, 40, 50
MAC 802.11
Bit-rate 2 Mbps
Tx power 100mW
Join interval Poisson(10s)
Leave interval Poisson(20s)
Unicast data interval Poisson(5s)
Multicast data interval Poisson(10s)
Leader die interval Poisson(30s)
Mobility model Random way point
Move speed Uniform[0, 5mps]
Simulation Environments
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Repair Frequency (RMMRP vs. MMAODV)
10 20 30 40 500
50
100
150
200
250
300
RMMRPMMAODV
節點個數
修復次數
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Control Overhead (RMMRP vs. MMAODV)
10 20 30 40 500
1000
2000
3000
4000
5000
6000
7000
8000
RMMRP_RREQRMMRP_RREPRMMRP_MACTMMAODV_RREQMMAODV_RREPMMAODV_MACT
節點個數
控制封包量
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Control Overhead (RMMRP vs. MMAODV+ERS)
10 20 30 40 500
1000
2000
3000
4000
5000
6000
7000
8000
RMMRP_RREQRMMRP_RREPRMMRP_MACTMMAODV+ERS_RREQMMAODV+ERS_RREPMMAODV+ERS_MACT
節點個數
控制封包量
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Control Overhead
10 20 30 40 500
2000
4000
6000
8000
10000
12000
14000
16000
RMMRPMMAODV+ERS+MPMMAODV+ERSMMAODV
節點個數
控制封包量
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Delivery Ratio (RMMRP vs. MMAODV)
10 20 30 40 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
RMMRP_UnicastRMMRP_MulticastMMAODV_UnicastMMAODV_Multicast
節點個數
傳送成功率
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Delivery Ratio (RMMRP vs. MMAODV+ERS)
10 20 30 40 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
RMMRP_UnicastRMMRP_MulticastMMAODV+ERS_UnicastMMAODV+ERS_Multicast
節點個數
傳送成功率
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Pure Multicast
10 20 30 40 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
RMMRPMMAODV+ERS+MPMMAODV+ERSMMAODV
節點個數
傳送成功率
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Pure Multicast (RMMRP vs. MMAODV)
10 20 30 40 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
RMMRP_10sRMMRP_2sRMMRP_0.4sMMAODV_10sMMAODV_2sMMAODV_0.4s
節點個數
傳送成功率
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Speed (RMMRP vs. MMAODV)
0-5 5-10 10-15 15-200
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
RMMRP_UnicastRMMRP_MulticastMMAODV_UnicastMMAODV_Multicast
移動速率 Uniform(a, b) (m/s)
傳送成功率
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Mobility model (RMMRP vs. MMAODV)
10 20 30 40 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
RMMRP_RWPRMMRP_MassRMMRP_BaseMMAODV_RWPMMAODV_MassMMAODV_Base
節點個數
傳送成功率
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7. Conclusions and future works
Modified core-based tree structure by Virtual mesh Bidirectional multicast data delivery
Proposed a reliable multisource multicast with Fast recovery Low control overhead Higher delivery ratio
Verified the performance through intensive simulations
Conclusions
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Future Works
Improve delivery ratio Cross-layered design (e.g. Network layer
with MAC) Other wireless medium
More performance metric End-to-end delay QoS
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Q & AThanks for your attention
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Reference
Royer, E.M. and Perkins, “Multicast operation of the ad-hoc on-demand distance vector routing protocol,” Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking ACM, 1999, pp. 207-218
Pham, N.D. and Choo, H., “Energy ERS for Route Discovery in MANETs,” Communications, 2008. ICC '08. IEEE International Conference on 2008, pp. 3002-3006
William Su, Sung-Ju L., and Mario Gerla, “Mobility Prediction In Wireless Networks,” MILCOM 2000. 21st Century Military Communications Conference Proceedings, 22-25 Oct. 2000, pp. 491-495, vol.1