27 October, 2000

Submission

doc.: IEEE 802.15-00/205r2 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title:

00205r2P802.15_TG3-MAC-Proposal-for-High-Rate-WPAN

Date Submitted:

27 October, 2000

Source:

Patrick Kinney

Company

Intermec Technologies Address 550 Second St. S.E., Cedar Rapids, IA, USA Voice: +1.319.369.3593

, FAX: +1.319.369.3299

, E-Mail: [email protected]

Re:

Revision to the earlier proposal for TG3 MAC

Abstract:

Presentation format of Proposed MAC for 802.15.3

Purpose:

For consideration as the baseline of the MAC for 802.15.3

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.

Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

TG3 MAC Proposal for High Rate WPAN

This MAC proposal has been improved from its earlier submission. Significant changes include a QoS mechanism from A Heberling’s MAC proposal, Selective rejection ACKs, RTS/CTS is now optional, and revised numbers for throughput and current drain.

Document 00/218r1 provides the technical backup for this presentation.

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

Targeted Applications for PicoLink



(1Mb/s)

Ent SCAN Ent • •

Cable replacement (point to point)

–

Barcode scanner to portable/mobile computer

–

Printer to portable/mobile computer Personal area connectivity (peer to peer)

–

hand held computer to numerous peripheral devices including scanners, printers, wide area network radios, etc.

F1 F5 F9 1 4 7 3 2 5 8 0 F2 F6 F10 F3 F7 F11 3 F4 F8 F12 3 6 9 PEN*KEY 6500 Picking Application Scan Item Description: Scan Location: 000123456 Tide Liq., 50oz.

BAY 31 Help Take to Location: Dock 5A Exit Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

Newly Targeted Applications

Existing WPANs

Submission

High Rate WPANs

Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

WPAN Solution Requirements

•

Very low cost

•

Low power consumption

•

Small size

•

Minimal attach/detach times

•

Interference immunity

•

Ease of use

•

Standardized interfaces

•

Unlicensed, international usability

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

PicoLink™ Advantages

•

Proven: Shipping for two years in a 1 Mb/s WPAN

•

Very low cost

•

Low power consumption

•

Small size (ASIC gate count and F/W size)

•

Fast response times, quick attach times

•

Superior trade-off between response time and current drain

•

Ease of use

•

Temporary split networks

•

Adaptability to different usage scenarios (PAN & Infrastructured)

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

Picolink™ Configurations

Personal Area Network

DADS Terminal PowerPad Astra Printer PowerShip terminal EST Access Point

6700

Ethernet

Infrastructured Network

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

Picolink™ Configurations

Personal Area Network

DADS Terminal PowerPad Astra Printer PowerShip terminal EST

•

Personal Area Network (PAN; Peer-to-Peer)

–

Multiple Networks co-habitate (20 or more have been tested at current 1 MHz data rate, but this attribute is strongly dependent upon the PHY)

– – –

Dynamic PAN and device IDs with network initiation Network maintained devices coming and going Temporary devices and Networks also supported

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

Picolink™ Configurations

Access Point

6700

Ethernet

Limited Infrastructured Network

•

Limited Infrastructured Network

–

Main device (access point) typically has power at all times (for fast access)

– –

Support for up to 10 devices Ethernet access points with higher layer protocol

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Transparent to Upper Layer Protocols • Ease of Use – Unique 48 bit address – Simple network join/un-join procedure – Device registration • CSMA: – Proven in current wired and wireless networks – Superior performance in high bandwidths Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• RTS/CTS: to avoid the hidden node issue, an optional RTS/CTS mode is supported with the Contention Access Period • ACK: To support a virtual error free delivery system ACKs are supported. Selective rejection is offered to reduce the ACK overhead • Peer to peer transmission reduces bandwidth requirements for non-master data transfers.

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Delivered Data Throughput – For the proposed raw data rate of 22 Mbps a throughput of 20 Mbps is anticipated (e.g. large transfer, Rx Tx to 10µS, 1024 byte frames) • Fast Response – Average response time for small packets is under 5 mS for current 1 Mbps system – Response time for TG3 will be dependent upon PHY and Superframe configuration Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Data Transfer Types – Asynchronous • short response times • CSMA/CA; collision sense/collision avoidance (similarities to 802.11 and 802.3) – Isochronous: time bounded delivery using the Heberling MAC’s QoS mechanism – Mixed traffic load management • slots for Async and Isoch Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Superframe

Contention Free Period Contention Access Period Asynchronous slots Isochronous slots Maintain station synchronization

•

coordinate sleep cycles

•

FH coordination (if necessary)

•

Asynchronous slot/cycle assignments

•

Isochronous slot/cycle assignments

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Superframe: Contention Access Period

Contention Free Period Contention Access Period Asynchronous slots Isochronous slots All control messages such as:

•

attachment requests

•

authentication responses

•

slot cycle requests In addition short data frames could be sent in this period

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Superframe: Contention Free Period

Contention Free Period Contention Access Period Asynchronous slots Isochronous slots Asynchronous slots are composed of cycles assigned to stations

Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Topology – Minimum number of active connections • Up to 10 nodes per network – Ad hoc network • Fully supported • Temporal ad-hoc networks are also supported – Access to portal • Any node on the network can provide a portal to another network • Multiple portals are possible Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Reliability – Master redundancy • in a peer to peer network the “master” merely coordinates the scheduled services. Data transfers occur between the desired nodes without assistance from the “master” • Any node on the network can assume the master(coordinator) role either by request from the master or by disappearance of the master Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Reliability (cont’d) – Loss of connection • The proposed system does provide a method for detection and recovering from the loss of a link • System has options allowing it to conserve current drain by allowing periodic searches for link re-establishment rather than continuous searches Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Power Management Types – Sleeping • Multiple time increments for sleeping are selectable, e.g. 1,2…beacon periods – Wakeup • Schedule service intervals allow the MAC to adapt to various PHY wakeup times – Polling • Beacons are scheduled and allow the nodes to wakeup listen for any pending messages and then go back to sleep if there are no messages Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Power Consumption of MAC controller State .8µ .25µ .18µ – Transmit (mA): – Receive (mA): 30 30 18 18 9 9 – Sleep (µA): 30 18 9 – Other Power Consumption Features • Programmable search duty cycle during loss of connect • Slave to slave links require less energy in a Peer to Peer topology than a Master/Slave topology Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Security – Authentication: Propose a Public Key method – Privacy: Propose the use of the 802.15.1 algorithm • Quality of Service – Time bounded algorithm from Heberling’s MAC using slot cycle TDMA Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

MAC Protocol Criteria

• Cost/Complexity – Baseband controller – functionality described for the HR MAC is estimated to be 10,000 gates.

– Code size – under 32 Kbytes w/o proposed enhancements Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

CRITERIA Transparent to Upper Layer Protocols (TCP/IP) Unique 48-bit Address REF.

3.1

FALSE Comparison Values TRUE Same N/A + Simple Network Join/UnJoin Procedures for RF enabled devices Device Registration 3.2.1

3.2.3

3.2.3

Not Qualified (required by 802) Extended procedure for joining network Requires manual configuration Essential 802.15.1 style join as specified in sections 8.10.6, 9.3.23 and 11.6.5.5

802.15.1 style registration as specified in sections 8.10.7 and 11.6.5.1-4.

N/A Enhanced self configuration of network Auto registration based on profile Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

CRITERIA Minimum delivered data throughput High end delivered data throughput (Mbps) Data Transfer Types REF.

3.3.2

3.3.3

3.4

Topology 3.5.1

20 Mbps minus MAC overhead 20 – 39 Mbps Asynchronous only Point-to Multipoint only Comparison Values Same 20 Mbps > 20 Mbps + 40 Mbps > 40 Mbps Asynchronous or Isochronous Point-to-Multipoint & Point-to-Point (with no Peer-to-Peer) Mixed Mode (Asynchronous & Isochronous simultaneously) Point-to-Multipoint, Point-to-Point & Peer-to-Peer Submission Pat Kinney, Intermec Technologies

27 October, 2000 doc.: IEEE 802.15-00/205r2

CRITERIA Max. # of active connections Ad-Hoc Network Access to a Portal Master Redundancy Loss of Connection Power Management Types REF.

3.5.2

3.5.3

3.5.4

3.6.2

3.6.3

3.7

< 7 Comparison Values Same 7 > 7 + FALSE FALSE FALSE FALSE Does not support power savings modes TRUE TRUE TRUE TRUE Supports 802.15.1

power savings modes as specified in sections 8.10.8.2-4 and 11.6.6.1-5 Enhanced N/A Enhanced N/A Enhanced power savings modes Submission Pat Kinney, Intermec Technologies

27 October, 2000

CRITERIA Power Consumption of MAC controller (the peak power of the MAC combined with an appropriate PHY) Authentication REF.

3.8

3.9.1

> 1.5 watts No authentication Privacy Quality of Service Submission 3.9.2

No encryption 3.9.2

No provisions for QoS

doc.: IEEE 802.15-00/205r2

Comparison Values Same Between .5 watt and 1.5 watts < .5 watt + 802.15.1 style authentication as specified in sections 8.14.4 and 9.3.2

Encryption as specified in 802.15.1 section 8.14.3 and 9.3.6

Equivalent to QoS specified in 802.15.1

section 9.3.20 , 10.6.3

and 11.6.6.6

Enhanced authentication at MAC layer Enhanced privacy at MAC layer Streams, priority, Controlled latency/jitter bounds, Connection agreements, Dynamic bandwidth allocation, Selective retransmission, Dynamic channel selection Pat Kinney, Intermec Technologies