Submission doc.: IEEE 802.11-12/0148r0 Nokia Internal Use Only January 2012 Chittabrata Ghosh, Nokia Slide 1 Date: 2012-01-19 Authors: Uplink Throughput.

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Presentation transcript:

Submission doc.: IEEE /0148r0 Nokia Internal Use Only January 2012 Chittabrata Ghosh, Nokia Slide 1 Date: Authors: Uplink Throughput Performance of IEEE 80211ah Networks under OBSS Scenarios

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Larger coverage range in IEEE ah network makes the OBSS problem more pronounced (limited channels but increased interference area) The OBSS Problem Chittabrata Ghosh, Nokia January 2012 Slide 2 AP

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Slide 3 Abstract Study the uplink throughput performance of IEEE ah network under OBSS Scenarios using two metrics: (i) average throughput (ii) coverage (10 percentile throughput) Chittabrata Ghosh, Nokia January 2012

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Indoor Multi-Floor Scenario 20 m 80 rooms in a building of 4 floors 20 rooms in each floor separated by a corridor Room Dimensions: 20m * 20m * 5m Building Dimension: 200m * 42m * 20m January 2012 Chittabrata Ghosh, Nokia Slide 4 1st floor 2nd floor 3rd floor 4th floor

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Slide 5 Topology with 2 APs and 4 STAs Example Scenario Chittabrata Ghosh, Nokia January 2012 AP1 STA1 Randomly place APs and STAs in any of the 80 rooms Each room can only have one AP but multiple STAs A STA associates with an AP based on minimum indoor path loss computations AP2 Coverage issues Hidden terminal problem

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Topology with 5 APs and 10 STAs Example Scenario January 2012 Chittabrata Ghosh, Nokia Example Scenario Slide 6 At least one STA connects to each AP

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Topology with 10 APs and 20 STAs Example Scenario January 2012 Chittabrata Ghosh, Nokia Example Scenario Slide 7

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Topology with 20 APs and 40 STAs January 2012 Chittabrata Ghosh, Nokia Example Scenario Slide 8

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Channel Bandwidth2MHz Building Dimension (L*B*H)200*40*20 m 3 Room Dimensions (L*B*H)20*20*5 m 3 Floor Attenuation Factors0, 12.9, 18.7, 24.4 Data Rate2.3 Mbps TX Power23dBm Antenna Gains3dBi Max Communication Range-88dBm Max Interference Range-92dBm Packet Size1500Bytes DIFS256µs SIFS160µs Slot Time48µs [CWmin, CWmax][15, 1023] Simulation Time160s Simulation Parameters January 2012 Chittabrata Ghosh, Nokia Slide 9

Submission doc.: IEEE /0148r0 Nokia Internal Use Only January 2012 Chittabrata Ghosh, Nokia Slide 10 Average Throughput = 81.5Kbps Uplink Throughput Performance (10 APs, 20 STAs) No RTS-CTS With RTS-CTS Average Throughput = Kbps

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Slide 11 Chittabrata Ghosh, Nokia 1 AP, 2 STAs 2 APs, 4 STAs 5 APs, 10 STAs 10 AP, 20 STA Average UL Throughput with and without RTS-CTS With RTS-CTS Without RTS-CTS Throughput (kbps) January APs, 40 STAs 177% increased throughput 69% increased throughput

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Coverage (10 Percentile Throughput) Performance with RTS-CTS Slide 12 Chittabrata Ghosh, Nokia January 2012 Throughput (kbps) 20 APs, 40 STAs 10 APs, 20 STAs 5 APs, 10 STAs 2 APs, 4 STAs 1 AP, 2 STAs 10% of the STAs have throughput below indicated value

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Discussions RTS and CTS significantly improves performance Unfairness in user throughput distribution in the presence of relatively large number of networks Slide 13 January 2012 Chittabrata Ghosh, Nokia

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Appendix: Uplink Throughput Performance (1 AP, 2 STAs) Average Throughput = Kbps January 2012 Chittabrata Ghosh, Nokia Slide 14 No RTS-CTS With RTS-CTS Average Throughput = Kbps

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Slide 15 Average Throughput = Kbps Chittabrata Ghosh, Nokia No RTS-CTS Average Throughput = Kbps Appendix: Uplink Throughput Performance (2 APs, 4 STAs) January 2012 With RTS-CTS

Submission doc.: IEEE /0148r0 Nokia Internal Use Only Average Throughput = Kbps January 2012 Chittabrata Ghosh, Nokia Slide 16 Appendix: Uplink Throughput Performance (5 APs, 10 STAs) No RTS-CTS With RTS-CTS Average Throughput = Kbps

Submission doc.: IEEE /0148r0 Nokia Internal Use Only January 2012 Chittabrata Ghosh, Nokia Slide 17 Average Throughput = 80.1Kbps Appendix: Uplink Throughput Performance (20 APs, 40 STAs) No RTS-CTS With RTS-CTS Average Throughput = Kbps