doc.: ieee 802.15-00/205r2 submission 27 october, 2000 pat kinney, intermec technologies project:...

27 October, 2000

Pat Kinney, Intermec Technologies

doc.: IEEE 802.15-00/205r2

Submission

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

Submission Title: 00205r2P802.15_TG3-MAC-Proposal-for-High-Rate-WPANDate Submitted: 27 October, 2000Source: Patrick Kinney Company Intermec TechnologiesAddress 550 Second St. S.E., Cedar Rapids, IA, USAVoice:+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.

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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.

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

Targeted Applications for PicoLink (1Mb/s)

• 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.

SCAN EntEnt

1 2 3

0

7 8 9

4 5 6

F1 F2 F3 F4

F9 F10 F11 F12

F5 F6 F7 F8

33

PEN*KEY 6500Picking Application

Scan Item 000123456Description: Tide Liq., 50oz.Scan Location: BAY 31Enter Quantity: 40

Take to Location: Dock 5A

Keyboard Keypad Help Exit

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

High Rate WPANsExisting WPANs

Newly Targeted Applications

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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)

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

Picolink™ Configurations

PersonalAreaNetwork

InfrastructuredNetwork

Access Point

PowerShip terminalAstra Printer

DADS Terminal

EST

PowerPad

Ethernet

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission


PersonalAreaNetwork

PowerShip terminalAstra Printer

DADS Terminal

EST

PowerPad

• 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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission


Limited InfrastructuredNetworkAccess Point

Ethernet

• 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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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.

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

MAC Protocol Superframe

Maintain station synchronization•coordinate sleep cycles•FH coordination (if necessary)•Asynchronous slot/cycle assignments•Isochronous slot/cycle assignments

Asynchronous slots

Isochronous slots

ContentionAccessPeriod

Be

aco

n Contention Free Period

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

MAC Protocol Superframe:Contention Access Period

All control messages such as: •attachment requests•authentication responses•slot cycle requestsIn addition short data frames could be sent in this period

Asynchronous slots

Isochronous slots


Be

aco


27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

MAC Protocol Superframe: Contention Free Period

Asynchronous slots are composed of cycles assigned to stations

Asynchronous slots

Isochronous slots


Be

aco


27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

MAC Protocol Criteria • Power Consumption of MAC controller

State .8µ .25µ .18µ – Transmit (mA): 30 18 9– Receive (mA): 30 18 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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

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

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission

CRITERIA REF. Comparison Values- Same +

Transparent to UpperLayer Protocols(TCP/IP)

3.1 FALSE TRUE N/A

Unique 48-bit Address 3.2.1 Not Qualified(required by802)

Essential N/A

Simple NetworkJoin/UnJoin Proceduresfor RF enabled devices

3.2.3 Extendedprocedure forjoining network

802.15.1 style join asspecified in sections8.10.6, 9.3.23 and11.6.5.5

Enhanced self-configuration ofnetwork

Device Registration 3.2.3 Requires manualconfiguration

802.15.1 styleregistration asspecified in sections8.10.7 and 11.6.5.1-4.

Auto registration basedon profile

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission


Minimum delivered datathroughput

3.3.2 20 Mbps minusMAC overhead

20 Mbps > 20 Mbps

High end delivered datathroughput (Mbps)

3.3.3 20 – 39 Mbps 40 Mbps > 40 Mbps

Data Transfer Types 3.4 Asynchronousonly

Asynchronous orIsochronous

Mixed Mode(Asynchronous &Isochronoussimultaneously)

Topology 3.5.1 Point-to-Multipoint only

Point-to-Multipoint &Point-to-Point (with noPeer-to-Peer)

Point-to-Multipoint,Point-to-Point &Peer-to-Peer

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission


Max. # of activeconnections

3.5.2 < 7 7 > 7

Ad-Hoc Network 3.5.3 FALSE TRUE EnhancedAccess to a Portal 3.5.4 FALSE TRUE N/AMaster Redundancy 3.6.2 FALSE TRUE EnhancedLoss of Connection 3.6.3 FALSE TRUE N/APower ManagementTypes

3.7 Does not supportpower savingsmodes

Supports 802.15.1power savings modesas specified in sections8.10.8.2-4 and11.6.6.1-5

Enhanced powersavings modes

27 October, 2000


doc.: IEEE 802.15-00/205r2

Submission


Power Consumption ofMAC controller (thepeak power of the MACcombined with anappropriate PHY)

3.8 > 1.5 watts Between .5 watt and1.5 watts

< .5 watt

Authentication 3.9.1 Noauthentication

802.15.1 styleauthentication asspecified in sections8.14.4 and 9.3.2

Enhancedauthentication at MAClayer

Privacy 3.9.2 No encryption Encryption as specifiedin 802.15.1 section8.14.3 and 9.3.6

Enhanced privacy atMAC layer

Quality of Service 3.9.2 No provisionsfor QoS

Equivalent to QoSspecified in 802.15.1section 9.3.20 , 10.6.3and 11.6.6.6

Streams,priority,Controlled latency/jitterbounds, Connectionagreements, Dynamicbandwidth allocation,Selectiveretransmission,Dynamic channelselection

doc.: ieee 802.15-00/205r2 submission 27 october, 2000 pat kinney, intermec technologies project:...

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