March 2003 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [TG3a-Wisair-CFP-Presentation] Date Submitted:

March 2003 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [TG3a-Wisair-CFP-Presentation] Date Submitted: [3 March, 2003] Source: [Gadi Shor] Company: [Wisair] Address: [24 Raoul Wallenberg st. Ramat Hachayal, Tel-Aviv, ISRAEL] Voice: [ ] FAX: [ ], Re: [ a Call for proposal] Abstract: [Wisair’s presentation for the P a PHY standard] Purpose: [Response to WPAN a Call for Proposals] Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P Gadi Shor, Wisair

Wisair’s Variable-Rate Multi-Band PHY layer Proposal for TG3a
March 2003 Wisair’s Variable-Rate Multi-Band PHY layer Proposal for TG3a Gadi Shor, Yaron Knobel, David Yaish, Sorin Goldenberg, Amir Krause, Erez Wineberger, Rafi Zack, Benny Blumer, Zeev Rubin, David Meshulam, Amir Freund Wisair Gadi Shor, Wisair

Contents Targets Main Features Physical layer
March 2003 Contents Targets Main Features Physical layer Implementation and Feasibility MAC enhancements Performance Self Evaluation Conclusions Gadi Shor, Wisair

March 2003 Targets Proposal for high bit-rate multi-band PHY layer for MAC Support applications with wireless transmission of Audio/Video and High-Rate data communication Allow cost effective, low power implementation on chip Gadi Shor, Wisair

Main Features Variable-rate Multi-band PHY
March 2003 Main Features Variable-rate Multi-band PHY Flexible (use 1->14 sub-bands out of 30) World-wide regulation Co-existence with current and future systems Interference mitigation Scalable (Variable pulse repetition frequency) 20 to 1000 Mbps Reduced ADC sampling rate at lower Bit-rate Power consumption vs. Bit-rate trade off Support MAC without modifications, only enhancements Support all selection criteria Gadi Shor, Wisair

Variable-Rate Multi-Band PHY layer
March 2003 Variable-Rate Multi-Band PHY layer Sub-bands frequency plan Pulse shape Operation modes Variable-rate time-frequency interleaving sequences Gadi Shor, Wisair

Frequency Plan Consideration Points
March 2003 Frequency Plan Consideration Points Consideration points : FCC mask In band mask – GHz Indoor FCC mask require 10db attenuation at 3.1GHz rejection Outdoor FCC mask require 20db attenuation at 3.1GHz rejection 802.11a Frequency range : US & Canada: GHz & GHz Japan: 4.9-5GHz , GHz Europe: GHz & GHz Gadi Shor, Wisair

Multi-Band Frequency-Plan
March 2003 Multi-Band Frequency-Plan Sub-bands are spaced 470 MHz apart For flexible co-existence and simple implementation Each sub band is generated by a pulse with 10 dB bandwidth of ~520 MHz Supports FCC requirements Gadi Shor, Wisair

Two overlapping frequency groups (A, B)
March 2003 Two overlapping frequency groups (A, B) A Second group overlap the first group 235 MHz aside enhance system flexibility with respect to co-existence, interference mitigation and multiple access Gadi Shor, Wisair

Upper and Lower Sub-Band Sets
March 2003 Upper and Lower Sub-Band Sets Each group is divided into lower (sub-bands 1-8) and upper (sub-bands 9-15) sets Only 7 sub-bands are used in the lower set One sub-band can be avoided The upper set is used in parallel to the lower set to increase the bit-rate First generation support lower set Next generation devices has backward compatibility Gadi Shor, Wisair

Signal spectrum: Group A - Lower Set (ADS Simulation)
March 2003 Signal spectrum: Group A - Lower Set (ADS Simulation) The sub-bands are divided into a lower set (lower 8 sub-bands) and an upper set (higher 7 sub-bands) Gadi Shor, Wisair

Co-existence March 2003 Center frequencies selected to allow elimination of one sub-band per region Only 7 sub-bands are used in the lower set according to the region Gadi Shor, Wisair

Co-existence March 2003 Only 7 sub-bands out of 8 are used in the lower set according to the region Gadi Shor, Wisair

Co-existence (US) US Co existence with 802.11a:
March 2003 US Co existence with a: avoid one of the Sub Channels: 4a,5a,5b,6b Gadi Shor, Wisair

Co-existence (US) Example: Avoid sub band 6b March 2003
Gadi Shor, Wisair

Co-existence (Europe)
March 2003 Europe Co existence with a: avoid one of the Sub Channels: 4a,5a,5b,6b Gadi Shor, Wisair

Co-existence (Europe)
March 2003 Example: Avoid sub band 5a Gadi Shor, Wisair

Co-existence (Japan) Japan Co existence with 802.11a:
March 2003 Japan Co existence with a: avoid one of the Sub Channels: 4a,4b Gadi Shor, Wisair

Co-existence (Japan) Example: Avoid sub band 4a March 2003
Gadi Shor, Wisair

Variable-Rate Multi-Band Modulation and Coding Scheme
March 2003 Variable-Rate Multi-Band Modulation and Coding Scheme The waveform is generated by time interleaving of pulses from different frequency sub-bands Modulation schemes: QPSK and BPSK Coding Schemes: Viterbi K=7, Rate ½, ¾ Three frame lengths supported to allow Reduced ADC sampling rate for improved power consumption Improved multiple access Gadi Shor, Wisair

Variable-rates Multi-Band
March 2003 Frame Lengths: 28 nSec: 7 pulses ~3.9 nSec with 250 Mpps 56 nSec: 7 pulses ~3.9 nSec with 125 Mpps 84 nSec: 7 pulses ~3.9 nSec with 83.3 Mpps Reduce sampling rate for reduced bit rate Gadi Shor, Wisair

125 Mpps signal example (ADS simulation)
March 2003 125 Mpps signal example (ADS simulation) Any number of sub-bands (N<=7) can be used Unused sub-bands are not transmitted Example shows 4 sub-bands in use Gadi Shor, Wisair

Multi-band signal generation
March 2003 Multi-band signal generation For Higher bit rates one frequency from the lower set and one from the upper set are used in parallel Gadi Shor, Wisair

Pulse Shape Pulse shape defines the envelope of the pulse 3.9 nSec
March 2003 Pulse Shape 3.9 nSec 4.0 nSec Pulse shape defines the envelope of the pulse Gadi Shor, Wisair

Operation Modes (7 bands example)
March 2003 Operation Modes (7 bands example) Mode Modulation Coding Rate Pulse Rate [Mpulse/sec] Frame Length [nsec] Data Rate [Mbs] -7 bands example 1 QPSK 250 28 500 2 375 3 4 125 56 187.5 5 6 83.33 84 83.3 7 BPSK 62.5 8 Repetition code x bands 17.86 Gadi Shor, Wisair

Bit rates vs. Number of sub-bands
March 2003 Bit rates vs. Number of sub-bands In each operation mode different number of sub-bands can be used The table shows Bit-Rates for different number of sub-bands under different operation modes Mode 5 with 7 sub-bands supports 125Mbps (Meets IEEE 110Mpbs requirement) Mode 3 with 7 sub-bands supports 250Mbps (Meets IEEE 200Mpbs requirement) Mode 1 with 7 sub-bands supports 500Mbps for scalability Mode 8 is used for the beacon, same information is transmitted over all sub-bands Gadi Shor, Wisair

Time-Frequency interleaving sequences
March 2003 Time-Frequency interleaving sequences Each piconet uses a different time-frequency interleaving sequence of length 7 The “same” sequence is used for the upper frequency set (in parallel to the lower set ) The set is used according to the sequence, the mode of operation and the number of sub-bands to be used Gadi Shor, Wisair

Collision Example: S1 and S2
March 2003 Collision Example: S1 and S2 Only one collision for every possible time offset Gadi Shor, Wisair

Variable-rate Time-Frequency interleaving sequences
March 2003 Variable-rate Time-Frequency interleaving sequences Example for 7 sub-bands using S2 in the different operation modes: 250, 125 and 83.3 Mpps Preserve time-frequency sequences collision properties for all modes Reduce multi-path effect on collision between piconets Improve multi-path mitigation and enable energy collection Gadi Shor, Wisair

Variable Rate Time Frequency interleaving sequences
March 2003 Variable Rate Time Frequency interleaving sequences Example for 4 sub-bands using S2 in the different operation modes: 250, 125 and 83.3 Mpps For lower number of sub-bands only relevant sub-bands are used Preserve the collision properties for any number of sub-bands Gadi Shor, Wisair

March 2003 Multiple-Access Use of different time-frequency interleaving sequences in different piconets to reduce collisions Reduce number of channels in use, to reduce collisions (FDM alternative when link budget good enough) Reduce pulse repetition frequency to reduce multi-path effects on Multiple access Gadi Shor, Wisair

March 2003 Preamble Use CAZAC sequences over all sub-bands in use (Similar to mode 8) Approximately 10 Micro Seconds Achieve False-Alarm and Miss-Detect requirements under multi-path and multiple access interference Use color code to improve piconet identification Gadi Shor, Wisair

Block Diagram – Analog Section
<month year> doc.: IEEE <doc#> March 2003 Block Diagram – Analog Section Gadi Shor, Wisair <author>, <company>

Block Diagram – Digital Section
<month year> doc.: IEEE <doc#> March 2003 Block Diagram – Digital Section Gadi Shor, Wisair <author>, <company>

Technical Feasibility
March 2003 Technical Feasibility Establish wireless link using prototype: 15Mbps: 30 meters 30Mbps: 25 meters 60Mbps: 18 meters Gadi Shor, Wisair

doc.: IEEE 802.15-<doc#>
<month year> doc.: IEEE <doc#> March 2003 Size The size was calculated using SiGe process with fT=60GHz for the analog blocks and 0.13 CMOS process for the digital blocks. The size includes pads overhead. Gadi Shor, Wisair <author>, <company>

Main Modes: Bit Rates versus Power Consumption and Link Margin
<month year> doc.: IEEE <doc#> March 2003 Main Modes: Bit Rates versus Power Consumption and Link Margin Mode Bit Rate with 7 sub-bands Link Budget Margin RF- Tx Power [mW] PHY Tx (0.13u) Total PHY Tx Power [mw] RF- Rx PHY Rx Total 5 125 4.84 65 20 85 100 30 130 3 250 9.79 95 140 40 180 Path loss based on AT&T measurements Separate for LOS and NLOS Include improvements with antenna gain in the receiver Gadi Shor, Wisair <author>, <company>

PHY Mapping on current 802.15.3 MAC
March 2003 PHY Mapping on current MAC The proposed PHY can be used with the current MAC without modifications Piconet channel is represented by Time–Frequency interleaving sequence Each Piconet choose a different sequence (channel) All Piconet devices use the same sequence (channel) The Piconet beacon frames are transmitted over all sub-bands This is done transparently to MAC (using the PHY mode 8) Gadi Shor, Wisair

March 2003 Location Awareness Special command frame that support Time Advanced measurement between two Piconet devices Two devices exchange two messages Dev A to Dev B: Send time A Dev B to Dev A: Time Diff A(Receive Time A - Send Time A ) and Send Time B Dev A calculates Time Diff B (Receive Time B - Send Time B ) Time between Dev A to Dev B = ½ (Diff A + Diff B) Gadi Shor, Wisair

Link Budget (7 sub-bands)
<month year> doc.: IEEE <doc#> March 2003 Link Budget (7 sub-bands) Positive link margins for main modes Gadi Shor, Wisair <author>, <company>

Performance under channel
March 2003 Performance under channel Bit rate: 125 Mbps Number of bands: 7 Simulating 400 channel realizations For each point either 250 packets or 21 packet errors were used Results represent 5Gbits at 20 GHz Shadow parameter in channel model dominate results Gadi Shor, Wisair

March 2003 125 Mbps CM1 channels Gadi Shor, Wisair

March 2003 125 Mbps CM1 (No Shadow) Gadi Shor, Wisair

March 2003 125 Mbps CM1 Statistics Gadi Shor, Wisair

doc.: IEEE 802.15-<doc#>
<month year> doc.: IEEE <doc#> March 2003 Co-Existence with A and B: Required attenuation below FCC limits Gadi Shor, Wisair <author>, <company>

Co-Existence (ADS simulation)
<month year> doc.: IEEE <doc#> March 2003 Co-Existence (ADS simulation) Supports co-existence with a Gadi Shor, Wisair <author>, <company>

doc.: IEEE 802.15-<doc#>
<month year> doc.: IEEE <doc#> March 2003 Interference Gadi Shor, Wisair <author>, <company>

802.11a Interference 100 cm (ADS Simulation)
March 2003 802.11a Interference 100 cm (ADS Simulation) Wanted signal bit Intereferer signal bit C/I F1A 31.129 C/I F2A 23.761 C/I F3A 13.492 C/I F5A 11.335 C/I F6A 24.262 C/I F7A 36.603 C/I F8A 44.194 10 20 30 40 50 60 70 0.002 0.004 0.006 0.000 0.008 time, nsec EBIT EBIT_INT C/I [dB] @Interefer: 5.15GHz, -30dBm Seven sub-bands with C/I better than 10 dB after eliminating one sub-band (F4A) Gadi Shor, Wisair

802.11a Interference 30 cm (ADS Simulation)
March 2003 802.11a Interference 30 cm (ADS Simulation) Wanted signal bit Intereferer signal bit C/I F1A 21.697 C/I F2A 14.143 C/I F3A 3.996 C/I F5A 1.425 C/I F6A 14.582 C/I F7A 26.718 C/I F8A 34.313 10 20 30 40 50 60 70 0.002 0.004 0.006 0.000 0.008 time, nsec EBIT EBIT_INT C/I [dB] @Interefer: 5.15GHz, -20dBm Five sub-bands with C/I better than 10 dB after eliminating one sub-band (F4A) Gadi Shor, Wisair

Performance with 802.11a under AWGN
March 2003 Performance with a under AWGN ISR=55 dB in AWGN (including F.E. rejection) Allows 30 cm separation Gadi Shor, Wisair

Performance with 802.11a under CM1
March 2003 Performance with a under CM1 ISR=50 dB in CM1 (including F.E. rejection) Allows 50 cm separation Gadi Shor, Wisair

Performance Under Multiple-Access
March 2003 Performance Under Multiple-Access Desired piconet: CM1 (49) Interfering piconet: CM1 (1) Worst case shift between piconets ISR=12.3 dB for 8% per Allows R(desired)/R(interefer) = 4 Example: R(Desired)=10 meter allows R(Interferer)=2.5 meter ISR can be improved by reducing number of sub-bands or reducing PRF Gadi Shor, Wisair

Self Evaluation – General Solution Criteria
<month year> doc.: IEEE <doc#> March 2003 Self Evaluation – General Solution Criteria CRITERIA Evaluation Unit Manufacturing Cost (UMC) + Signal Robustness Interference And Susceptibility Coexistence Technical Feasibility Manufacturability Time To Market Regulatory Impact Scalability Location Awareness Gadi Shor, Wisair <author>, <company>

Self Evaluation – PHY Protocol Criteria
<month year> doc.: IEEE <doc#> March 2003 Self Evaluation – PHY Protocol Criteria CRITERIA Evaluation Size and Form Factor + Payload Bit Rate Packet Overhead PHY-SAP Throughput Simultaneously Operation Piconets Signal Acquisition System Performance Link Budget Sensitivity Power Management Modes Power Consumption Antenna Practicality Gadi Shor, Wisair <author>, <company>

Self Evaluation – MAC Protocol Enhancement Criteria
<month year> doc.: IEEE <doc#> March 2003 Self Evaluation – MAC Protocol Enhancement Criteria CRITERIA Evaluation MAC Enhancement and Modifications + Gadi Shor, Wisair <author>, <company>

Conclusions Multi-Band scheme Variable Rate scheme
March 2003 Conclusions Multi-Band scheme 30 Sub-bands allows flexible system meets all selection criteria Variable Rate scheme Low power for lower bit rates Reduces ISI problem Improves multiple access Technology demonstrated on prototype Gadi Shor, Wisair

Wisair will be cooperating with:
March 2003 a Early Merge Work Wisair will be cooperating with: Intel Time Domain Discrete Time General Atomics Philips FOCUS Enhancements Objectives: “Best” Technical Solution ONE Solution Excellent Business Terms Fast Time To Market We encourage participation by any party who can help us reach our goals. Gadi Shor, Wisair

March 2003 Backup Slides Gadi Shor, Wisair

Contents Physical layer Implementation and Feasibility
March 2003 Contents Physical layer Implementation and Feasibility MAC enhancements Performance Gadi Shor, Wisair

March 2003 MAC Enhancements (1) UWB based WPAN system should support a higher bit rate (e.g. 110Mbps, 200Mbps) Current MAC Throughput is degraded in high bit rate Support a bigger packet length Bigger packets may be needed for high data rate applications Improve the throughput For both small and large packet sizes For retransmission mode Support Multiband channel assignment Decide on usable sub bands Select the time frequency interleaving sequence Gadi Shor, Wisair

MAC Enhancements (2) PHY SAP Data Throughput Calculation
March 2003 MAC Enhancements (2) PHY SAP Data Throughput Calculation Payload Throughput PHY-SAP = N x Payload_bits / [ T_PA_INITIAL+T_SIFS + (N-1) x (T_PA_CONT+T_MIFS) + N x (Payload_bits/R_Pay+T_MACHDR + T_PHYHDR+T_HCS+T_FCS)] Gadi Shor, Wisair

MAC Enhancements (3) IEEE802.15.3 PHY-SAP Data Throughput
March 2003 MAC Enhancements (3) IEEE PHY-SAP Data Throughput N= 5 Frames T_PA_INITIAL = 15uSec T_PA_CONT = 15uSec MACHDR=10 Octets PHYHDR=2 Octets HCS=2 Octets FCS = 4 Octets T_SIFS = 10uSec T_MIFS = 2uSec Gadi Shor, Wisair

March 2003 MAC Enhancements (4) IEEE PHY-SAP Data Throughput in High Bit Rates N= 5 Frames T_PA_INITIAL = 15uSec T_PA_CONT = 15uSec MACHDR=10 Octets PHYHDR=2 Octets HCS=2 Octets FCS = 4 Octets T_SIFS = 10uSec T_MIFS = 2uSec Gadi Shor, Wisair

March 2003 MAC Enhancements(5) Proposed MAC Performance PHY-SAP Data Throughput in High Bit Rates N= 5 Frames T_PA_INITIAL = 15uSec T_PA_CONT = 15uSec MACHDR=10 Octets PHYHDR=2 Octets HCS=2 Octets FCS = 4 Octets T_SIFS = 10uSec T_MIFS = 2uSec Gadi Shor, Wisair

MAC Enhancements (6) Proposed MAC Frame Structure
March 2003 MAC Enhancements (6) Proposed MAC Frame Structure Allow larger MAC frame body size (e.g Octets Frame body consists of N Sub-frames Sub-frame consists of Data block unit and CRC Data block unit is limited by a maximum number of octets (e.g. 512 octets) Gadi Shor, Wisair

March 2003 MAC Enhancements (7) The proposed UWB PHY structure is based on multi-band UWB system MAC logical channel is mapped to several frequency bands Some bands might be interfered (useless) by other existing systems (I.e IEEE802.11a – 5GHz) MAC should be able to drive a Bands Quality Assessment (BQA) that determines whether a specific band is usable or not The Piconet Coordinator (PNC) should be able to distribute the usable bands to all its associated devices Gadi Shor, Wisair

MAC Enhancements (8) Provide BQA time slot at the Supper-frame
March 2003 MAC Enhancements (8) Provide BQA time slot at the Supper-frame Useful information is distributed as Information Element (IE) over PNC Beacon Beacon will transmitted over the whole frequency bands Gadi Shor, Wisair

March 2003 MAC Enhancements (9) Gadi Shor, Wisair

Contents Physical layer Implementation and Feasibility
March 2003 Contents Physical layer Implementation and Feasibility MAC enhancements Performance Gadi Shor, Wisair

March 2003 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [TG3a-Wisair-CFP-Presentation] Date Submitted:

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March 2003 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [TG3a-Wisair-CFP-Presentation] Date Submitted:

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Presentation on theme: "March 2003 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [TG3a-Wisair-CFP-Presentation] Date Submitted:"— Presentation transcript:

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