November 2007 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Binary CDMA for BAN] Date Submitted: [9 Nov., 2007] Source: [Changsoo Eun, Seung-Moon Ryu] Company [CNU, Casuh, Inc.] Address [813 Leaders Building, 342-1 Yatap-dong, Bundang-gu, Seongnam, Gyeonggi-do 463-070, Korea ] Voice:[+82-31-709-5577], FAX: [+82-31-709-5578], E-Mail:[eun@ieee.org, retaw@casuh.com] Re: [Contribution to IEEE 802.15 SG-BAN Meeting, November 2007] Abstract: [This document presents Binary CDMA: a constant envelope CDMA air interface for short range BAN applications.] Purpose: [Proposal] Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. Casuh, Inc.

November 2007 Binary CDMA for BAN Casuh, Inc. Casuh, Inc.

What is Binary CDMA? What is binary CDMA? Constant RF envelope November 2007 What is Binary CDMA? What is binary CDMA? Constant RF envelope RF amplifiers with high linearity are not necessary. Simple circuitry Support both CDMA and TDMA Casuh Code 1 Casuh Code 2 Casuh Code 3 Data1 Data2 Data3 Casuh Code 4 Data4 Casuh Code n Data n M Casuh Code 1 Casuh Code 2 Casuh Code 3 Casuh Code 4 Casuh Code n Data1 Data2 Data3 Data4 Data n TDMA RF TDMA RF Casuh, Inc.

What is Binary CDMA? How to generate B-CDMA … … … … November 2007 13 X c1(t) d1(t) e1(t) c2(t) d2(t) e2(t) cn(t) dn(t) en(t) … … 11 Encoding X c1(t) d1(t) e1(t) c2(t) d2(t) e2(t) cn(t) dn(t) en(t) … … 9 7 5 3 Tr = 1 1 Binary CDMA Binary CDMA -1 -3 -5 -7 -9 -11 -13 n : odd Casuh, Inc.

What is Binary CDMA? PW(pulse width) and SB (sign bit) November 2007 5 -5 -3 -1 1 3 5 Tc Truncated Signal PW modulated Signal Sign Bit Signal Casuh, Inc.

Error Performance Error performance of SB-CDMA 64-bit code November 2007 Error Performance Error performance of SB-CDMA 64-bit code Casuh, Inc.

November 2007 Error Performance Another simulation Casuh, Inc.

Error Performance Error performance of SB-CDMA November 2007 Error Performance Error performance of SB-CDMA 64-bit code of duo binary format Casuh, Inc.

Binary CDMA without Loss November 2007 Binary CDMA without Loss CS/CDMA d1 Block A orthogonal code set C1 ~ C8 d2 Ci d3 Correlator c1 d1 d4 max absolute value Ci d5 d2 Block A orthogonal code set C9 ~ C16 Correlator Encoding d6 Cj c2 d3 d7 Correlator d8 c3 d9 Block A orthogonal code set C17 ~ C24 d10 Ck d11 d12 d12 Correlator p1 c32 Block A orthogonal code set C25 ~ C32 p2 Cp p3 p4 Casuh, Inc.

Error Performance Comparison of error performances November 2007 Error Performance Comparison of error performances Without amplifier nonlinearity Casuh, Inc.

Error Performance Comparison of error performances November 2007 Error Performance Comparison of error performances With amplifier nonlinearity Ideal Channel Saturated Eb /N0 BER Casuh, Inc.

Introduction of Retaw Retaw (reversed ‘w-a-t-e-r’) November 2007 Introduction of Retaw Retaw (reversed ‘w-a-t-e-r’) Retaw is a proprietary PHY/MAC specification. Chips for short-range applications are already available. Wireless multi-channel translation system Wireless conference system Pico-net digital broadcasting system Multiple wireless microphone system Technologies in Retaw PHY Binary CDMA for baseband ZigBee RF Compatible MAC Uniformed Super Frame Structure Proprietary protocol Casuh, Inc.

Introduction of Retaw Features of Retaw Low power consumption November 2007 Introduction of Retaw Features of Retaw Low power consumption Deep sleep possible Low interference Simultaneous communications Peer-to-peer Point-to-multipoint Simple (cheap) hardware Support for scalable data rate up to 3.2 Mbps Inherent security Very simple MAC Accommodates more than 100 devices Multiple simultaneous network operation Casuh, Inc.

Multi-hop/Multi-link November 2007 Evolution of Retaw Retaw: Now and Future Retaw-1 (Now) Retaw-2 (Future) Carrier Freq. 2.4 G 400M, 900M, 2.4G Protocol Clock Rate 1 Mbps 62.5 K, 1 M Data Rate 10 K - 3.2 Mbps 50 bps - 3.2 Mbps Power Consumption (active/sleep) 30 mA/50 µA (100 µA - 20 mA)/10 µA RF Modulation GFSK, MSK MSK, QPSK Preamble length 128 bits 8 bits, 128 bits Baseband Modulation HC/CDMA, TDMA Long Code, SB/CDMA, TDMA Topology Peer-to-peer, Point-to-multipoint Retaw1 + Multi-hop/Multi-link Applications Audio, Voice, Data Retaw1 + Mobile Video, USN, BAN Casuh, Inc.

Evolution of Retaw Retaw-2 = Enhanced Retaw-1 + ZigBee November 2007 S/P Codeword (16) Data S/P d1 d2 Ci c1 d3 d1 d4 c2 Data x 3 d5 d2 d6 Cj Encoding ZigBee RF ZigBee RF d3 d7 c3 Data d8 d9 d10 Ck d11 d12 p1 d12 p2 Cp c32 p3 p4 High Data High Data Low Data Low Data Long Code Long Code Casuh, Inc.

Evolution of Retaw Modes of Retaw-2 Mode 1 Mode 2 Mode 3 Mode 4 Remark November 2007 Evolution of Retaw Modes of Retaw-2 Mode 1 Mode 2 Mode 3 Mode 4 Remark Type Binary CDMA TDMA ZigBee Long Code Frequency 2.4G,900M,400M 2.4G Synch Two PHY Data Rate 800K 3.6M 250K 50bps Pure data # Simul. Ch. 5 x 16 16 128 Code Length 64 - 16 / 32 16000 Multiple Access Synch - LBT CSMA-CA Asynch - collision Application Multi channel Multimedia Sensor Secure control Casuh, Inc.

Peak Power Consumption November 2007 Evolution of Retaw Retaw for BAN Requirements Retaw Operating Range In, on, or around Body Up to 3 m Data Rate Scalable Few Kbps - few Mbps Frequency Unlicensed & MIC 402-405 M, ISM, UWB Peak Power Consumption Few μW - few 10mW Coexistence No interference Up to 5 pico-nets Up to 100 devices/net Connection Virtual path Peer-to-peer, Peer-to-multipoint Topology Multiple simultaneous link Multi-hop/Multi-link Security High Authentication, privacy, encryption Future Proof Realizable Proven technology Location Desirable Few cm Casuh, Inc.

Evolution of Retaw Retaw for BAN Secure channel procurement QoS November 2007 Evolution of Retaw Retaw for BAN Secure channel procurement QoS Low power consumption Synchronized dual Phy (Avoid Mutual Interference) Scalable Data Rate (Adaptive Process Gain) Reliable Link Connection (Relay) Casuh, Inc.