42
SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Embed Size (px)

Citation preview

Page 1: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM

Carlos Pereira

Page 2: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

2

Outline

• Problem Statement• Idea• Evaluation metrics• Results• Conclusions

Page 3: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

3

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

Page 4: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Idea: Recover packets from collisions using SIC

• Objective• Feasibility/Benefit Study

• Requirements• Characterization/Evaluation of packet collision

4

Page 5: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

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

5

Page 6: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

6

• Packet drop probability• 60 Veh/km; 4 Lanes; TxPower = 20; Packet Size = 500 Bytes; Beacon Rate = 6Hz

Page 7: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

7

• Packet drop probability• Reasons for Drop in StartRx (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size =

500 Bytes; Beacon Rate = 6Hz)

Page 8: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

8

• Packet drop probability• Reasons for Drop in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet

Size = 500 Bytes; Beacon Rate =6Hz)

Page 9: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

9

• Packet drop probability• Reasons for Drop in EndHeader (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet

Size = 500 Bytes; Beacon Rate =6Hz)

Page 10: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

10

• Packet drop probability• Reasons for Drop in EndRx (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size =

500 Bytes; Beacon Rate =6Hz)

Page 11: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

11

• Packet drop probability• Variation of Beacon rate (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet Size = 300

Bytes)

Page 12: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

12

• Packet drop probability• Variation of Beacon rate in StartRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet

Size = 300 Bytes)

Page 13: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

13

• Packet drop probability• Variation of Beacon rate in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20 dB;

Packet Size = 300 Bytes)

Page 14: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

14

• Packet drop probability• Variation of Beacon rate in EndRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Packet

Size = 300 Bytes)

Page 15: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

15

• Packet drop probability• Variation of Packet Size (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon Rate =

6Hz)

Page 16: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

16

• Packet drop probability• Variation of Packet Size in StartRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon

Rate = 6Hz)

Page 17: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

17

• Packet drop probability• Variation of Packet Size in EndPreamble (60 Veh/km; 4 Lanes; TxPower = 20 dB;

Beacon Rate = 6Hz)

Page 18: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

18

• Packet drop probability• Variation of Packet Size in EndRx (60 Veh/km; 4 Lanes; TxPower = 20 dB; Beacon

Rate = 6Hz)

Page 19: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

19

• Packet drop probability• Variation of Vehicle Density (4 Lanes; TxPower = 20 dB; Packet Size = 500 Bytes;

Beacon Rate = 6Hz)

Page 20: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

20

• Packet drop probability• Variation of Vehicle Density in StartRx (4 Lanes; TxPower = 20 dB; Packet Size =

500 Bytes; Beacon Rate = 6Hz)

Page 21: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

21

• Packet drop probability• Variation of Vehicle Density in EndPreamble (4 Lanes; TxPower = 20 dB; Packet

Size = 500 Bytes; Beacon Rate = 6Hz)

Page 22: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

22

• Packet drop probability• Variation of Vehicle Density in EndRx (4 Lanes; TxPower = 20 dB; Packet Size =

500 Bytes; Beacon Rate = 6Hz)

Page 23: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

23

• Packet drop probability• Variation of TxPower (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate

=6Hz)

Page 24: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

24

• Packet drop probability• Variation of TxPower in StartRx (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes;

Beacon Rate =6Hz)

Page 25: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

25

• Packet drop probability• Variation of TxPower in EndPreamble (60 Veh/km; 4 Lanes; Packet Size = 500

Bytes; Beacon Rate =6Hz)

Page 26: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

26

• Packet drop probability• Variation of TxPower in EndRx (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes;

Beacon Rate =6Hz)

Page 27: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

27

• Probability of being involved in a collision

Page 28: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

28

• Probability of being involved in a collision

Page 29: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

29

• Number of packets overlapping• Average

Page 30: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

30

• Number of packets overlapping• Average

Page 31: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

31

• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 2 Hz)

Page 32: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

32

• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 6 Hz)

Page 33: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

33

• Number of packets overlapping• Histogram (60 Veh/km; 4 Lanes; Packet Size = 500 Bytes; Beacon Rate = 10 Hz)

Page 34: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

34

• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 2 Hz)

Page 35: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

35

• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 6 Hz)

Page 36: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

36

• Energy distribution of colliding packets• Histogram for 1 Interferer (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 10 Hz)

Page 37: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

37

• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 2 Hz)

Page 38: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

38

• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 6 Hz)

Page 39: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

39

• Energy distribution of colliding packets• Histogram for 3 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 10 Hz)

Page 40: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

40

• Energy distribution of colliding packets• Histogram for 5 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 6 Hz)

Page 41: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Results

41

• Energy distribution of colliding packets• Histogram for 5 Interferers (60 Veh/km; 4 Lanes; TxPower = 20dB; Packet Size = 500 Bytes;

Beacon Rate = 10 Hz)

Page 42: SUCCESSIVE INTERFERENCE CANCELLATION IN VEHICULAR NETWORKS TO RELIEVE THE NEGATIVE IMPACT OF THE HIDDEN NODE PROBLEM Carlos Pereira

Conclusions

Our feeling…

42

Benefit

Load6 Mbps