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Doc.: IEEE 802.11-14/0339-00-0hew Submission March 2014 Raja Banerjea, CSRSlide 1 A Simplified Simultaneous Transmit and Receive Mechanism Date: 2014-03-17.

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Presentation on theme: "Doc.: IEEE 802.11-14/0339-00-0hew Submission March 2014 Raja Banerjea, CSRSlide 1 A Simplified Simultaneous Transmit and Receive Mechanism Date: 2014-03-17."— Presentation transcript:

1 doc.: IEEE / hew Submission March 2014 Raja Banerjea, CSRSlide 1 A Simplified Simultaneous Transmit and Receive Mechanism Date: Authors:

2 doc.: IEEE / hew Submission In band STR (Full Duplex) transmission allows 100% increase in Network throughput. Traditional STR transmission require STR AP and STR capable STA. We present a simplified STR mechanism which only requires STR capability at the AP and can be supported by traditional STAs. March 2014 Slide 2Raja Banerjea, CSR Abstract

3 doc.: IEEE / hew Submission Increasing Network Throughput In Band STR Challenges A simplified STR mechanism Analytic results showing STR performance Next Steps March 2014 Slide 3Raja Banerjea, CSR Topics

4 doc.: IEEE / hew Submission Increasing Network Throughput Max Data Rate based on Shannon Limit = B log 2 (1 + S/N) x (1- T GI / T SYML )x N data / N carr A 5 dB RF Noise Figure + Implementation noise is considered for both the sensitivity and the theoretical maximum. Conclusion: Modulations above 16-QAM ¾ are already spectrally efficient STR allows 100 % increase in network throughput. These gains are difficult to achieve otherwise. Raja Banerjea, CSR

5 doc.: IEEE / hew Submission In Band STR Challenges March 2014 Slide 5 IEEE 11-13/1122r0 “Considerations for In-Band Simultaneous Transmit and Receive (STR) feature in HEW” presented state of STR technology. Total Cancellation of 110 dB is achievable However the system cost is considerable -RF Isolation -Analog Cancellation -Digital Cancellation The proposed mechanism enables In Band STR communication using In Band STR capable AP and legacy STAs Raja Banerjea, CSR

6 doc.: IEEE / hew Submission Proposed STR in WLAN March 2014 Naveen Kakani, CSRSlide 6 Leverage attenuation and path loss between STAs to develop a simplified STR solution. The increased complexity is only at the Access Point. Access Point uses knowledge of path loss between STAs to Group STAs for In band STR transmission. Traditional WLAN: Half Duplex transmission In Band STRProposed Solution

7 doc.: IEEE / hew Submission Benefits of simplified In Band STR March 2014 Slide % increase in network throughput No increase in complexity at the STA Compatible with legacy deployments Takes advantage of Wall attenuation and Path Loss Raja Banerjea, CSR

8 doc.: IEEE / hew Submission Analytical Results March 2014 Slide 8 Considered Path Loss between AP and STAs in some typical deployment scenarios IEEE n channel model – L(d) = LFS(d BP ) + 35 log10(d / d BP ) d > d BP – LFS(d BP ) = 40 dB (2.4 GHz) ; 46 dB (5 GHz) – d BP = 1 m – Wall Loss = 12 dB Typical Scenarios Small Residence ( ~ 1200 sq ft ) Ranch House ( ~ 3000 sq ft ) Class Rooms Raja Banerjea, CSR

9 doc.: IEEE / hew Submission Analytical Results March 2014 Raja Banerjea, CSRSlide 9 AP and STA-1 location was fixed and the path loss measured between AP and STA1 (PL AP_STA-1 ) and the location and STA-1 ( PL STA-1STA-2 ) Path Loss is measured using the shortest path to estimate distance and number of walls If measured difference in Path Loss is greater than TBD dB then In Band STR is feasible in that configuration

10 doc.: IEEE / hew Submission Ranch House ( ~ 3000 sq ft ) March 2014 Slide 10 PL AP_STA1 PL STA1_STA2 Fixed AP Fixed STA 1 STA 2 Raja Banerjea, CSR

11 doc.: IEEE / hew Submission Small Residence ( ~ 1200 sq ft ) March 2014 Raja Banerjea, CSRSlide 11

12 doc.: IEEE / hew Submission Ranch House ( ~ 3000 sq ft ) March 2014 Raja Banerjea, CSRSlide 12

13 doc.: IEEE / hew Submission Class Rooms March 2014 Raja Banerjea, CSRSlide 13

14 doc.: IEEE / hew Submission Conclusion March 2014 Raja Banerjea, CSRSlide 14 In band STR can increase the network throughput by 100 % The simplified In band STR mechanism leverages wall attenuation and path loss between STAs and enables STR where only the Access Point is STR capable. In Band STR can be used along with MU-MIMO and SU-MIMO and provides increased throughput

15 doc.: IEEE / hew Submission Next Steps March 2014 Raja Banerjea, CSRSlide 15 Path Loss Measurements in typical environments Measure the allowed co-channel interference A simplified MAC protocol for In-Band STR

16 doc.: IEEE / hew Submission [1] hew-str-radios-and-str-media-access.pptx [2] hew-co-time-co-frequency-full-duplex-for wlan.pptx [3] r0-considerations for In-Band Simultaneous Transmit and Receive (STR) feature in HEW March 2014 Raja Banerjea, CSRSlide 16 References


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