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

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 [[email protected]]

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.

March 2004

Fabrice Legrand, Thales ComsSlide 2

doc.: IEEE 802.15-04/119r0

Submission

THALES Communications motivation in IEEE 802.15.4a

Fabrice Legrand

[email protected]

THALES Communicationss

March 2004


doc.: IEEE 802.15-04/119r0

Submission

THALES Coms applicationsTHALES Coms applications

Communications & localization in groups of firefighters, soldiers, …

• Communications between elements of the group in urban areas or obstructed areas

Data rate : 100 kb/sMultiple services : voice, dataOverall range : 1 km in free space by using multi-hops relayingRelaying 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 m1 m accuracy up to 1000m

• Localization of the elements3D localization based on multiple stations, synchronized or notTOA & AOA measurements

March 2004


doc.: IEEE 802.15-04/119r0

Submission


Communications & localization in groups of hikers, …

• Communications between elements of the group in obstructed areasModerate voice data rate (64 kb/s)Overall range : 1 km in free space by using multi-hops

relayingRelaying 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)

March 2004


doc.: IEEE 802.15-04/119r0

Submission


Sensors networks

• Low data rate sensors networkData rate : < 10 kb/sService : dataRange between a sensor and the collecting point : < 1 kmMulti-hops relayingMutual distance measurements

Collecting point& Gateway

March 2004


doc.: IEEE 802.15-04/119r0

Submission


LDRS : Low Data Rate sensorHDRS : High Data Rate sensor

HDRS

HDRS

Collecting point & Gateway

LDRS

LDRS

LDRS

LDRS

LDRS

LDRS

LDRS

LDRS

LDRS

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

March 2004


doc.: IEEE 802.15-04/119r0

Submission

THALES Coms UWB competencies (1)THALES Coms UWB competencies (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

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

Synchronization sequence

Node IDInformation

fieldTH

code

March 2004


doc.: IEEE 802.15-04/119r0

Submission

THALES Coms UWB competencies (2)THALES Coms UWB competencies (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)

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doc.: IEEE 802.15-04/119r0

Submission

ConclusionConclusion

• 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

March 2004


doc.: IEEE 802.15-04/119r0

Submission

ReferencesReferences

[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.

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

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