successive interference cancellation in vehicular networks to relieve the negative impact of the...
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SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM
Carlos Pereira
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Outline
• Problem Statement• Idea• Evaluation metrics• Results• Conclusions
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Problem Statement
• Hidden Node
• Amount of packet collisions increases for:• Increasing Vehicle density• Increasing Transmitted Power• Increasing of Packet Size • Increasing of Beaconing rate
Increasing of load
Unsynchronized transmissions Packet Collisions
Idea: Recover packets from collisions using SIC
• Objective• Feasibility/Benefit Study
• Requirements• Characterization/Evaluation of packet collision
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Evaluation metrics
• Reception and Drop Probabilities • Probability of being involved in a collision• Number of packets overlapping• Energy distribution of colliding packets• Probability of Recovery through SIC
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Results
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• Packet drop probability• 60 Veh/km; 4 Lanes; TxPower = 20; Packet Size = 500 Bytes; Beacon Rate = 6Hz
Results
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• Packet drop probability• Reasons for Drop in StartRx (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size =
500 Bytes; Beacon Rate = 6Hz)
Results
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• Packet drop probability• Reasons for Drop in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet
Size = 500 Bytes; Beacon Rate =6Hz)
Results
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• Packet drop probability• Reasons for Drop in EndHeader (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet
Size = 500 Bytes; Beacon Rate =6Hz)
Results
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• Packet drop probability• Reasons for Drop in EndRx (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size =
500 Bytes; Beacon Rate =6Hz)
Results
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• Packet drop probability• Variation of Beacon rate (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet Size = 300
Bytes)
Results
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• Packet drop probability• Variation of Beacon rate in StartRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet
Size = 300 Bytes)
Results
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• Packet drop probability• Variation of Beacon rate in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20 dB;
Packet Size = 300 Bytes)
Results
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• Packet drop probability• Variation of Beacon rate in EndRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet
Size = 300 Bytes)
Results
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• Packet drop probability• Variation of Packet Size (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon Rate =
6Hz)
Results
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• Packet drop probability• Variation of Packet Size in StartRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon
Rate = 6Hz)
Results
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• Packet drop probability• Variation of Packet Size in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20 dB;
Beacon Rate = 6Hz)
Results
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• Packet drop probability• Variation of Packet Size in EndRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon
Rate = 6Hz)
Results
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• Packet drop probability• Variation of Vehicle Density (4 Lanes; TxPower = 20 dB; Packet Size = 500 Bytes;
Beacon Rate = 6Hz)
Results
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• Packet drop probability• Variation of Vehicle Density in StartRx (4 Lanes; TxPower = 20 dB; Packet Size =
500 Bytes; Beacon Rate = 6Hz)
Results
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• Packet drop probability• Variation of Vehicle Density in EndPreamble (4 Lanes; TxPower = 20 dB; Packet
Size = 500 Bytes; Beacon Rate = 6Hz)
Results
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• Packet drop probability• Variation of Vehicle Density in EndRx (4 Lanes; TxPower = 20 dB; Packet Size =
500 Bytes; Beacon Rate = 6Hz)
Results
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• Packet drop probability• Variation of TxPower (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate
=6Hz)
Results
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• Packet drop probability• Variation of TxPower in StartRx (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes;
Beacon Rate =6Hz)
Results
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• Packet drop probability• Variation of TxPower in EndPreamble (60 Veh/km; 4 Lanes; Packet Size = 500
Bytes; Beacon Rate =6Hz)
Results
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• Packet drop probability• Variation of TxPower in EndRx (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes;
Beacon Rate =6Hz)
Results
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• Probability of being involved in a collision
Results
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• Probability of being involved in a collision
Results
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• Number of packets overlapping• Average
Results
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• Number of packets overlapping• Average
Results
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• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 2 Hz)
Results
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• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 6 Hz)
Results
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• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 10 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 2 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 6 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 10 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 2 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 6 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 10 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 5 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 6 Hz)
Results
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• Energy distribution of colliding packets• Histogram for 5 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;
Beacon Rate = 10 Hz)
Conclusions
Our feeling…
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Benefit
Load6 Mbps