Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS)

1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANS) Submission Title: [THALES Coms motivation in IEEE 802.15.4a] Date Submitted: [March 2004] Source: [Fabrice Legrand] Company [THALES Coms] E-mail [Fabrice.LEGRAND@fr.thalesgroup.com] Re: [] Abstract: [] Purpose: [IEEE 802.15.4a] 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 or organization. The material in this document is subject to change in form and content after further study. The contributor reserves 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.

2. THALES Coms motivation in IEEE 802.15.4a Fabrice Legrand Fabrice.LEGRAND@fr.thalesgroup.com THALES Coms Fabrice Legrand, Thales Coms

3. THALES Coms UWB applications • Communications & localization in groups of firefighters, soldiers, … • Communications between elements of the group in urban areas or obstructed areas • Data rate : 100 kb/s • Multiple services : voice, data • Overall range : 1 km in free space by using multi-hops relaying • Relaying at the MAC level (real-time) • Sub-groups connectivity management (indoor conditions) • Distance measurement between elements of the group (Homing function) • 0.1 m accuracy up to 30 m • 1 m accuracy up to 1000m • Localization of the elements • 3D localization based on multiple stations, synchronized or not • TOA & AOA measurements Fabrice Legrand, Thales Coms

4. THALES Coms UWB applications Communications & localization in groups of hikers, … • Communications between elements of the group in obstructed areas • Moderate voice data rate (64 kb/s) • Overall range : 1 km in free space by using multi-hops relaying • Relaying at the MAC level (real-time) • Sub-groups connectivity management (obstructed outdoor conditions) • Distance measurement between elements of the group (Homing function) • Moderate range of distance measurement (30m) • High accuracy of distance measurement (10 cm) • Low cost product (mass market) Fabrice Legrand, Thales Coms

5. THALES Coms UWB applications • Sensors networks • Low data rate sensors network • Data rate : < 10 kb/s • Service : data • Range between a sensor and the collecting point : < 1 km • Multi-hops relaying • Mutual distance measurements Fabrice Legrand, Thales Coms

6. LDRS Collecting point & Gateway LDRS LDRS LDRS HDRS LDRS HDRS LDRS LDRS LDRS LDRS : Low Data Rate sensor HDRS : High Data Rate sensor LDRS THALES Coms UWB applications • Sensors networks • Low and High data rate sensors network • Combination of Low Data Rate (LDRS) and High Data Rate Sensors (HDRS) such as day/night camera, ... • LDRS always active, HDRS in stand-by mode and activated when activity detected by LDRS close to it Fabrice Legrand, Thales Coms

7. Synchronization sequence Node ID Information field TH code RTS contention window Decision period CTS contention window Sub-window 1 Sub-window 2 Sub-window 3 Sub-window 4 Sub-window 1 Sub-window 2 Sub-window 3 Sub-window 4 THALES Coms UWB competences (1) • MAC, relaying & routing procedures • In an ad hoc topology, the access protocol can be : • Fully distributed : no particular node used for synchronization or resource allocation • Pseudo distributed : any node can be used to synchronize the network and allocate resources • Fully distributed MAC protocol (SEBROMA, French RNRT ERABLE program ) : • Use of different THCs, among which 1 for common signaling channel (THsign) • Receiver oriented: potential receivers send RTC messages (Ready To Communicate) on THsign • After reception of a RTC, RTS / CTS packets exchange on a randomly chosen code. • Possibility to differentiate packets priorities (by using sub windows) Fields of the RTC frame (THsign) RTS/CTS exchange Fabrice Legrand, Thales Coms

8. THALES Coms UWB competences (2) • MAC, relaying & routing procedures • Pseudo distributed MAC protocol : • Adaptation of the IEEE 802.15.3 standard (IST project U.C.A.N.) to impulse-based UWB • Suppression of the Contention Access Period (because of clear channel assessment problem) • Addition of a relaying possibility at MAC level (intra-piconet) • Special procedures added for distance measurement, information can be used for routing • MAC implementation on a Software/Hardware demonstration platform • Further developments/studies foreseen : • Other fully distributed protocols to comply with 802.15.SG4a expectations (low complexity, size and power consumption) • Improvements of low-level relaying and routing (delay constraints) Fabrice Legrand, Thales Coms

9. Conclusion • « Ultra-Wide » range of needs for location-aware, low data rate and low-power applications (civil and military) • Objectives of Thales Coms. – Wireless Activity: • Help and support the standardization for such applications • Bring our experience in UWB (PHY-MAC close interactions) • Promote a solution for efficient networking: • low range, potentially large areas  fast relaying and routing • high number of devices  fast deployment and reconfigurabilty Fabrice Legrand, Thales Coms

10. References [1] H. Anouar, Y. Souilmi and C. Bonnet, “Self-Balanced Receiver-Oriented MAC for Ultra-wideband Mobile Ad-Hoc Networks, IWUWBS 2003 Proceedings, June 2003. [2] F. Legrand, I. Bucaille and al., “U.C.A.N.’s Ultra Wide Band System: MAC and Routing protocols”, IWUWBS 2003 Proceedings, June 2003. Fabrice Legrand, Thales Coms