Transcript 00205r2P802-15_TG3-MAC-Proposal-for-High-Rate

27 October, 2000
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.
Submission
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)
• Cable replacement (point to point)
Ent
Ent
1
2
4
5
7
8
9
3
0
3
F1
– Barcode scanner to portable/mobile
computer
– Printer to portable/mobile computer
SCAN
F2
3
6
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
• Personal area connectivity (peer to
peer)
– hand held computer to numerous peripheral
devices including scanners, printers, wide
area network radios, etc.
PEN*KEY 6500
Picking Application
Scan Item
Description:
Scan Location:
Enter Quantity:
Keyboard
000123456
Tide Liq., 50oz.
BAY 31
40
Keypad
Help
Exit
Take to Location: Dock 5A
Submission
Pat Kinney, Intermec Technologies
27 October, 2000
doc.: IEEE 802.15-00/205r2
Newly Targeted Applications
Existing WPANs
High Rate WPANs
Submission
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
PowerPad
DADS Terminal
Astra Printer
PowerShip terminal
EST
6700
Ethernet
Infrastructured
Network
Access
Point
Submission
Pat Kinney, Intermec Technologies
27 October, 2000
doc.: IEEE 802.15-00/205r2
Picolink™ Configurations
Personal
Area
Network
PowerPad
DADS Terminal
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
6700
Ethernet
Access
Point
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
Beacon
MAC Protocol Superframe
Contention
Access
Period
Contention Free 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
Beacon
MAC Protocol Superframe:
Contention Access Period
Contention
Access
Period
Contention Free 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
Beacon
MAC Protocol Superframe:
Contention Free Period
Contention
Access
Period
Contention Free 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):
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
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
CRITERIA
doc.: IEEE 802.15-00/205r2
REF.
-
Transparent to Upper
Layer Protocols
(TCP/IP)
Unique 48-bit Address
3.1
FALSE
3.2.1
Simple Network
Join/UnJoin Procedures
for RF enabled devices
3.2.3
Not Qualified
(required by
802)
Extended
procedure for
joining network
Device Registration
3.2.3
Submission
Requires manual
configuration
Comparison Values
Same
TRUE
N/A
Essential
N/A
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.
Enhanced selfconfiguration of
network
+
Auto registration based
on profile
Pat Kinney, Intermec Technologies
27 October, 2000
CRITERIA
doc.: IEEE 802.15-00/205r2
REF.
20 Mbps minus
MAC overhead
20 – 39 Mbps
Comparison Values
Same
20 Mbps
> 20 Mbps
40 Mbps
> 40 Mbps
Mixed Mode
(Asynchronous &
Isochronous
simultaneously)
Point-to-Multipoint,
Point-to-Point &
Peer-to-Peer
+
Minimum delivered data
throughput
High end delivered data
throughput (Mbps)
Data Transfer Types
3.3.2
3.4
Asynchronous
only
Asynchronous or
Isochronous
Topology
3.5.1
Point-toMultipoint only
Point-to-Multipoint &
Point-to-Point (with no
Peer-to-Peer)
Submission
3.3.3
Pat Kinney, Intermec Technologies
27 October, 2000
CRITERIA
doc.: IEEE 802.15-00/205r2
REF.
-
Max. # of active
connections
Ad-Hoc Network
Access to a Portal
Master Redundancy
Loss of Connection
Power Management
Types
Submission
3.5.2
<7
3.5.3
3.5.4
3.6.2
3.6.3
3.7
FALSE
FALSE
FALSE
FALSE
Does not support
power savings
modes
Comparison Values
Same
7
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
+
>7
Enhanced
N/A
Enhanced
N/A
Enhanced power
savings modes
Pat Kinney, Intermec Technologies
27 October, 2000
CRITERIA
doc.: IEEE 802.15-00/205r2
REF.
> 1.5 watts
Power Consumption of
MAC controller (the
peak power of the MAC
combined with an
appropriate PHY)
Authentication
3.8
3.9.1
No
authentication
Privacy
3.9.2
No encryption
Quality of Service
3.9.2
No provisions
for QoS
Submission
Comparison Values
Same
Between .5 watt and
1.5 watts
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
+
< .5 watt
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