19 March, 2002 doc.: IEEE 802.15-02/157r0 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.

Submission Slide 1 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

HR WPAN (802.15.3) Value Proposal

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

Submission Slide 2 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

802.15.3 Main Characteristics

• • • •

High Rate WPAN:

– –

Short Range (at least 10m) High Data rates (currently up to 55Mb/s, to be increased by SG3a)

Dynamic Topology:

– –

Mobile devices often join and leave piconet Short connection time (<1s)

Ad-hoc network with Multimedia QoS provisions

– –

TDMA for streams with time based allocations Peer to peer connectivity

Multiple Power Management Modes:

–

Designed to support low power portable devices

Submission Slide 3 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

802.15.3 Main Characteristics

• • • •

Low price point, low complexity and small form factor Secure Network:

– –

PK authentication Shared Key encryption (AES 128) and integrity (data and commands, SHA-2)

Ease-of-use:

– – –

Dynamic coordinator selection and handover Key distribution and management (PK) Does not rely on a backbone network

Designed for relatively benign multipath environment:

–

Personal or home space (RMS delay spread <25ns)

Submission Slide 4 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002

802.15.3 Main Applications

doc.: IEEE 802.15-02/157r0

•

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 to/from kiosk

Submission Slide 5 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

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, which are not required to be coordinator capable Communication is peer to peer Support for multimedia QoS:

–

TDMA superframe architecture with Guaranteed Time Slots (GTS) Authentication, encryption and integrity Multiple power saving modes (asynchronous and synchronous) 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, TX power control per link PNC handover

Submission Slide 6 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

Scalable Security Capabilities

• Mode 0 is no security • Mode 1 allows the user to restrict access to the piconet • Mode 2 provides cryptographic authentication and command integrity.

• Mode 3 provides data protection, command and data integrity as well as authentication. This mode also allows the use of digital certificates.

• The security modes above mode 0 are optional Submission Slide 7 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002

Superframe Structure

doc.: IEEE 802.15-02/157r0

• • •

Time-slotted superframe structure consists of 3 sections: Beacon:

–

transmits control information to the entire piconet, allocates resources (GTS) per stream ID for the current superframe and provides time synchronization Optional 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

Submission Slide 8 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

•

GTS and MTS Slots

GTSs 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 the GTS positions, but needs to communicate and confirm with both Tx and Rx DEVs

–

Variable 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

Submission Slide 9 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

Channel Time Request Command

Octets: 1 Target DEVID 1 1 Stream Index Stream Request ID 1 1 SPS Set Index Stream CTR Control 2 CTR Interval 2 1 CTR Time Unit Minimum CTR Time Units 1 Desired CTR Time Units • • • •

Command directly sent to the PNC for the stream 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

Submission Slide 10 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

• • • • •

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: approximately 8 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

– –

Provides for dynamic channel selection Per link dynamic power control

Submission Slide 11 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

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

– – –

Goal of > 100Mbps @ 10 m, > 400 Mbps @ 5 m 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 Expect to establish a Task Group in July UWB is a potential candidate for these VHR WPAN applications

Submission Slide 12 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

• •

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 Kids’ room Cluster 802.11a/e or HL2_DM Bridge Living Room Cluster

• • • • •

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 may or may not support bridging Will support Bus reset and allocation of 1394 Physical-ID for the piconet Address Resolution Protocol will not be implemented in the MAC

Submission Slide 13 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies

19 March, 2002 doc.: IEEE 802.15-02/157r0

Wireless 1394 Implementation

Applications Configure & Error Control Rd, Wr, lock Transaction Layer

Asynchronous Port

1394-SSCS MAC CPS MAC PHY Video Codec

Synchronous Port •

The Convergence Sublayer (1394 SSCS) is needed 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 would transport wired-1394 asynchronous & isochronous packets over the wireless network and also provide 1394 clock distribution

Submission Slide 14 Pierre Gandolfo, XtremeSpecturm Inc.

James P. K. Gilb, Appairent Technologies