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:
Download ReportTranscript 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 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: – – • Dynamic Topology: – – • • PK authentication (still TBD) Shared Key encryption (still TBD) and integrity Ease-of-use: – – – • Designed to support low power portable devices Low price point, low complexity and small form factor Secure Network: – – • Mobile devices often enter and exit piconet Short connection time (<1s) Ad-hoc network with Multimedia QoS provisions Multiple Power Management Modes: – • • Short Range (about 10m) High Data rates (up to 55Mb/s) Dynamic coordinator Selection and handover Key distribution and management (PK) Does not rely on a backbone network Designed for benign multipath channels: – Submission Personal or home Space (RMS delay spread<25ns) Slide 3 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 4 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies 19 March, 2002 doc.: IEEE 802.15-02/157r0 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: – – – – Submission MP3 players Personal Home storage Printers & scanners Digital still cameras and Kiosk 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 • • 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 Submission Slide 6 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies 19 March, 2002 doc.: IEEE 802.15-02/157r0 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 Submission Slide 7 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies 19 March, 2002 doc.: IEEE 802.15-02/157r0 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 Submission Slide 8 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies 19 March, 2002 doc.: IEEE 802.15-02/157r0 Channel Time Request Command 8 8 8 8 8 16 16 8 8 Target DEVID Stream Index Stream Request SPS Set Index Stream CTR Control CTR Interval CTR Time Unit Minimum CTR Time Units Desired CTR Time Units ID • • 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 Submission Slide 9 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, 64QAM (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 Submission Slide 10 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 – (>> 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 Submission Slide 11 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 Living Room Cluster Kids’ 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 Submission Slide 12 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies 19 March, 2002 doc.: IEEE 802.15-02/157r0 Wireless 1394 Implementation Applications • • • Rd, Wr, lock Asynchronous Port 1394-SSCS MAC CPS 802.15.3 MAC 802.15.3 PHY Video Codec Synchronous Port FW/HW Transaction Layer Controller) Serial Bus Mgmt (Bus Mnger, IRM, Node FW Configure & Error Control 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 Submission Slide 13 Pierre Gandolfo, XtremeSpecturm Inc. James P. K. Gilb, Appairent Technologies