Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas...

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January 2001 Tom Siep, Texas Instruments Slide 1 doc.: IEEE 802.15- 01/037r0 Submiss ion Texas Instruments Responses to TG4 CFA • Classroom Network • Low Data Rate Computer Peripherals

Transcript of Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas...

Page 1: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 1

doc.: IEEE 802.15-01/037r0

Submission

Texas Instruments Responses to TG4 CFA

• Classroom Network• Low Data Rate Computer Peripherals

Page 2: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 2

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• What are the types of devices in that application– Graphing calculators– Teacher workstation– Printer (may be attached to workstation)

Page 3: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 3

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• How many devices are in this low rate network?– Range 10 to 64– Typically 30

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January 2001

Tom Siep, Texas InstrumentsSlide 4

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• Describe how the network is initiated– Students arrive at classroom– Teacher initiates communications with

“known” units– Students turn on calculators are are

automatically registered with the correct teacher’s network

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January 2001

Tom Siep, Texas InstrumentsSlide 5

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• How do devices attach and detach from the network– Auto-attach, based on configuration

• Beginning of semester units identified with student/class

• Teacher can alter configuration at workstation

– Detach is power-down

• Is human intervention required?– Initial setup

– Power-up

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January 2001

Tom Siep, Texas InstrumentsSlide 6

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Submission

Classroom Network

• Describe the traffic flow of the data– Bursty interaction

• Problem download

• Solution upload

• Printing

– Most times data channel is idle

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January 2001

Tom Siep, Texas InstrumentsSlide 7

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Submission

Classroom Network

• Describe the type of data that flows in each branch of the network.– Fairly uniform data types for all students and

teacher– Multicast useful from workstation, but

subsequent verification of complete downloads necessary

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January 2001

Tom Siep, Texas InstrumentsSlide 8

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Submission

Classroom Network

• How much data is typically in each message?– Typical payload of 100 to 500 bytes– Ability to handle a bitmap of 2K is a plus

• Infrequent

• No other activity on net at time

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January 2001

Tom Siep, Texas InstrumentsSlide 9

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• How often are messages sent?– Several times per hour per student

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January 2001

Tom Siep, Texas InstrumentsSlide 10

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Submission

Classroom Network

• How much latency in the message transfer is acceptable?– 1 to 3 seconds typical, 5 seconds max

Page 11: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 11

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Submission

Classroom Network

• Describe the network topology– Master/slave– Peer to peer not allowed (no cheating!)

Page 12: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 12

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• Is there a master node? Where do data flows originate and terminate? Are the devices peer to peer or master/slave?

Page 13: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 13

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Submission

Classroom Network

• Does this network have to interface to another network? – Yes

• If so, how should these two networks be connected?– Through the workstation LAN connection

Page 14: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 14

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• If two low-rate networks are in range of one another, should they interact? – Unlikely

• If yes, how?– If >64 students (e.g. a lecture hall) then may

have to have several networks all connected to the main workstation

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January 2001

Tom Siep, Texas InstrumentsSlide 15

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Submission

Classroom Network

• Do the devices support authentication and security?– Authentication is important– Security less important

Page 16: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 16

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• What is the data traffic type? – Asynchronous

Page 17: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

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Submission

Classroom Network

• What are the battery life requirements?– Minimum: 1 week– Desired: 1 semester– Rechargeable in place also desirable

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January 2001

Tom Siep, Texas InstrumentsSlide 18

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Submission

Classroom Network

• What is the physical size of the low-rate transceiver?– Calculator: ~ compact flash card– Workstation: don’t care

Page 19: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 19

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Submission

Classroom Network

• What is the range requirement of the application?– 10 Meters

• In same room

• Through human bodies

• Around metal desks, tables, chairs

• Desirable if does not go through walls

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January 2001

Tom Siep, Texas InstrumentsSlide 20

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Submission

Classroom Network

• What is the estimate market size (units) of the proposed application?– Population of grades 6-12– Estimated 3 year lifetime of device

Page 21: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 21

doc.: IEEE 802.15-01/037r0

Submission

Classroom Network

• Will this application benefit from location awareness? – no

Page 22: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 22

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• How many devices are in this low rate network?– 2 to 5

Page 23: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 23

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• What are the types of devices in that application – Keyboard– Mouse– Joystick– Speakers (?)– Low Resolution Printers (?)

Page 24: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 24

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• Describe how the network is initiated.– Power-up of computer system

Page 25: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 25

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• How do devices attach and detach from the network. – Once assigned, a peripheral is always attached

to the same system on power-up

• Is human intervention required?– Initial “introduction” only

Page 26: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 26

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• Describe the traffic flow of the data– Keystrokes: 800 bps typical maximum, 10 bit

payload per packet – Mouse movement 500 bps, 50 bit payload– Joystick 1000 bps upstream, 50 bit payload– Joystick 200 bps downstream, 20 bit payload

Page 27: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 27

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Submission

Low Data Rate Computer Peripherals

• How often are messages sent?– Constant during computer usage

Page 28: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 28

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• How much latency in the message transfer is acceptable?– Human threshold: 100 ms typical, but must be

consistent

Page 29: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 29

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• Describe the network topology– Master (computer chassis) / Slave (peripherals)

Page 30: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 30

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• Does this network have to interface to another network? – no

Page 31: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 31

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• If two low-rate networks are in range of one another, should they interact? – no

Page 32: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 32

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• Do the devices support authentication and security?– Both are important

Page 33: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 33

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• What is the data traffic type? – Asynchronous for lowest rate– Synchronous may be needed if speakers can be

supported

Page 34: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 34

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Submission

Low Data Rate Computer Peripherals

• What are the battery life requirements?– 1 Month

Page 35: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 35

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• What is the physical size of the low-rate transceiver?– Compact Flash size

Page 36: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 36

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• What is the range requirement of the application?– 1 to 2 meters

Page 37: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 37

doc.: IEEE 802.15-01/037r0

Submission

Low Data Rate Computer Peripherals

• What is the estimate market size (units) of the proposed application?– Annual production of personal computers

Page 38: Doc.: IEEE 802.15-01/037r0 Submission January 2001 Tom Siep, Texas InstrumentsSlide 1 Texas Instruments Responses to TG4 CFA Classroom Network Low Data.

January 2001

Tom Siep, Texas InstrumentsSlide 38

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Submission

Low Data Rate Computer Peripherals

• Will this application benefit from location awareness? – no


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