doc.: ieee 802.15-02/157r0 submission 19 march, 2002 pierre gandolfo, xtremespecturm inc. james p....

19 March, 2002

Pierre Gandolfo, XtremeSpecturm Inc.James P. K. Gilb, Appairent Technologies

Slide 1

doc.: IEEE 802.15-02/157r0

Submission

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: [TG3 Coexistence capabilities]Date Submitted: [19 March 2002]Source: [Pierre Gandolfo] Company [XtremeSpectrum Inc.]Address [1001 N Rengstorff Avenue, Suite 200, Mountain View, CA, 94043]Voice [(650) 230 0494], Fax [(650) 938-7071], E-mail [[email protected]]

[James P. K. Gilb] Company: [Appairent Technologies]Address: [9921 Carmel Mountain Rd. #247, San Diego, 92129]Voice:[1-858-538-3903], FAX: [1-858-538-3903], E-Mail:[[email protected]]

Re: []

Abstract: [802.15.3 Overview – High Rate WPAN Standard.]

Purpose: [To present information about the 802.15.3 draft standard for the March 2002 1394 WWG interim meeting.]

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.

19 March, 2002


Slide 2

doc.: IEEE 802.15-02/157r0

Submission

HR WPAN (802.15.3) Value Proposal

High Rate WPAN enables multimedia connectivity between portables devices within personal operating space

19 March, 2002


Slide 3

doc.: IEEE 802.15-02/157r0

Submission

802.15.3 Main Characteristics• High Rate WPAN:

– Short Range (about 10m)– High Data rates (up to 55Mb/s)

• Dynamic Topology:– Mobile devices often enter and exit piconet– Short connection time (<1s)

• Ad-hoc network with Multimedia QoS provisions• Multiple Power Management Modes:

– Designed to support low power portable devices• Low price point, low complexity and small form factor• Secure Network:

– PK authentication (still TBD)– Shared Key encryption (still TBD) and integrity

• Ease-of-use:– Dynamic coordinator Selection and handover– Key distribution and management (PK)– Does not rely on a backbone network

• Designed for benign multipath channels:– Personal or home Space (RMS delay spread<25ns)

19 March, 2002


Slide 4

doc.: IEEE 802.15-02/157r0

Submission

HR WPAN (802.15.3) Value Proposal

High Rate WPAN enables multimedia connectivity between portables devices within personal operating space

19 March, 2002


Slide 5

doc.: IEEE 802.15-02/157r0

Submission

802.15.3 Main Applications

• Video and audio distribution:– High Speed DV transfer from a digital camcorder to a TV screen– HD MPEG2 between video players/gateways and HD display– Home Theater– Computer graphics– Interactive video gaming

• High Speed Data transfer:– MP3 players– Personal Home storage– Printers & scanners– Digital still cameras and Kiosk

19 March, 2002


Slide 6

doc.: IEEE 802.15-02/157r0

Submission

Qualities of the 802.15.3 MAC

• Centralized and connection-oriented ad-hoc networking topology:– The coordinator (PNC) maintains network synchronization timing, performs admission control, assigns time for connection between 802.15.3 devices (DEV), manages PS requests,…– DEV’s

• Communication is Peer to Peer• Support for MM QoS:

– TDMA superframe architecture with Guaranteed Time Slots (GTS)• Mutual Authentication, encryption and integrity• Multiple PS Modes (Reduced PS, Extended or TIM PS) • Multiple ACK policies (No ACK, Imm-ACK, Del-ACK and implied ACK)• Simplicity:

– All QoS negotiations and flow control handling are done at layer 3– PNC only handles channel time requests

• Robustness:– Dynamic Channel Selection, repeater service, Tx power control per link– PNC handover

19 March, 2002


Slide 7

doc.: IEEE 802.15-02/157r0

Submission

Superframe Structure

Time-slotted superframe structure made of 3 sections:• Beacon: transmits control information to the entire piconet (Max tx power,synchronization, allocation of resources (GTS) per stream ID for the incoming superframe• CAP (CSMA/CA):

– used for authentication/association request/response, stream parameters negotiation,… (command frames)– PNC can replace the CAP with MTS slots using slotted Aloha access

• CFP made of:– Unidirectional Guaranteed Time Slots (GTS) assigned by the PNC for isochronous or asynchronous data streams– Optional Management Time Slots (MTS) in lieu of the CAP for command frames

19 March, 2002


Slide 8

doc.: IEEE 802.15-02/157r0

Submission

GTS and MTS Slots• GTS may have different persistence

– Dynamic GTS: position in superframe may change from superframe to superframe (Beacon CTA IE or broadcast channel time Grant command)– Pseudo-static GTS (isochronous streams): PNC may change position, but needs to communicate and confirm with both Tx and Rx DEVs– Guard times between adjacent slots to prevent collision (clock drift)

• MTS– Open & Dedicated MTS: Used for PNC/DEV communication– Association MTS– Number of MTS per superframe is controlled by the PNC

19 March, 2002


Slide 9

doc.: IEEE 802.15-02/157r0

Submission

Channel Time Request Command

• Command directly sent to the PNC for Stream <source DEV-ID, Target DEV-ID, Stream index>• Stream CTR Control:

– Indicates if this is a request for the creation of a new stream or the modification of an existing stream, – Also contains the “CTR interval type” field that specifies the number of slots per superframe (0) or the number of superframes per slot (1), – Selects the GTS type (pseudo-static or dynamic)

• CTR time Unit: Unit of time used by the device. Ex: [frame, ACK, SIFS]• Min Channel Time Request = CTR_Time_Unit * Min. CTR units

8

Stream Index

8

Stream CTR

Control

8

SPS Set Index

16

CTR Interval

16

CTR Time Unit

8

Desired CTR Time Units

8

Target DEVID

8

Minimum CTR Time Units

8

Stream Request

ID

19 March, 2002


Slide 10

doc.: IEEE 802.15-02/157r0

Submission

2.4GHz PHY

• 5 selectable data rates:– 11, 22, 33, 44, 55 Mb/s– 11 Msymbol/s– Modulation formats: BPSK, QPSK (no coding), 16, 32, 64-QAM (8-state Trellis code)

• 15 MHz channel bandwidth• 3 or 4 non-overlapping channel• Transmit Power: 0-4 dBm• Coexistence:

– Compared to 802.11, an 802.15.3 2.4GHz PHY system causes less interference since it occupies a smaller bandwidth and transmits at lower power levels

19 March, 2002


Slide 11

doc.: IEEE 802.15-02/157r0

Submission

Alternate PHY Study Group (802.15.3a)

• 802.15.3 has created a Study Group to investigate the creation of an alternate PHY to address very high data rate applications– (>> 100Mbps)– 1394a, USB2.0 HS cable replacement– DV50, DV100, HD DVD, High resolution printer and scanner,

fast download speed for MP3 players, digital still cameras

• Currently reviewing Application Presentations and developing requirements documents

• PAR and 5C in May (TBR)• UWB could be a potential candidate for these VHR WPAN

applications

19 March, 2002


Slide 12

doc.: IEEE 802.15-02/157r0

Submission

Wireless 1394 Bus

• 802.15.3/a to interconnect multiple 1394 wireless devices within a room• HL2-DM or 802.11a/e as a bridge to interconnect multiple clusters located in

different rooms

Living Room ClusterKids’ room Cluster

802.11a/e or HL2_DM Bridge

• Isochronous resource Manager (selected PNC) will allocate bandwidth• The Wireless Cycle Master role within a cluster can be played by any DEV• 802.15.3 1394 CL will not support bridging• Will support Bus reset and allocation of 1394 Physical-ID for the piconet• Address Resolution Protocol will not be implemented

19 March, 2002


Slide 13

doc.: IEEE 802.15-02/157r0

Submission

Wireless 1394 Implementation

• The Convergence Sublayer (1394 SSCS) need to mimic the functions provided by the 1394 link layer• Services & Primitives provided by 1394 SSCS are a subset of those provided by the wired 1394 physical & link stacks (no cable environment)• 1394 SSCS transports wired-1394 asynchronous & isochronous packets over the wireless network and also provides 1394 clock propagation

Synchronous Port

MAC CPSSeri

al B

us M

gmt

(B

us M

nger

, IR

M, N

ode

Con

trol

ler)

FW/H

W1394-SSCS

Transaction Layer

FWConfigure & Error

ControlRd, Wr, lock

Applications

Asynchronous Port

802.15.3 MAC

802.15.3 PHY

Video Codec

doc.: ieee 802.15-02/157r0 submission 19 march, 2002 pierre gandolfo, xtremespecturm inc. james p....

Documents

unit of time

dynamicctr time unit

piconetshort connection

stream stream ctr control

sifsmin channel time

number of slots

adjacent slots

gts type