ho-in jeon associate professor of dept. ee at kyung-won university, convener of iso/iec jtc1 sc6...

Ho-In JeonAssociate Professor of Dept. EE at Kyung-Won University,

Convener of ISO/IEC JTC1 SC6 WG1,

Woo-Jin Shim, Yong-Gil Park, Dong-Hak Lee,and Jae-Whang Yu

Network R & D Center, SKTelecom

Jin-Seok BaeKATS (Korean Agency for technology and Standards)

Ho-In Jeon, Dept. EE, Kyung-Won Univ.Slide: 1

WiBEEM Tech. for Wireless Home Network Services

ISO/IEC JTC1 SC25 WG1 Meeting, March 26, 2007

[email protected], [email protected]

WiBEEM Technology for Wireless Home Network Services

SC25/WG1 N1271


[email protected], [email protected] WiBEEM Tech. for Wireless Home Network Services


Contents• Wireless Home Network Services and Related Issues

• Introduction to WiBEEM (Wireless Beacon-enabled Energy Efficient Mesh network) Protocol Wireless Mesh Network Capable of Saving Power Multiple Beacons Transmitted in One Superframe with all the

Beacons Scheduled for the Avoidance of Beacon Conflicts Space-Efficient Short Address Allocations in Real-Time High Speed Device Mobility and QoS Supported

• Structure of the WiBEEM Standard Part 1: Specifications on PHY Layer Specifications Part 2: Specifications on MAC Layer Specifications Part 3: Specifications on NWK Layer Specifications

• Conclusions




Wireless Home Network Services

• Wireless Healthcare Service Kids and Patients Care Senile Dementia Control

• Home Appliance Control Lights Control Gas Valve Shut Down

• AMR Service

• Wireless Internet Service

• Guest / Intruder Control




Healthcare Services and Wireless Terminal• Wireless Terminal

• Wireless Healthcare Watch

WiBEEM




Wireless Home Services with WiBEEM Tech.

DCam.

VPhone

DTV

DAMHS/

MMRG

InternetFTTH

DTV

PVR

VPhone

Refrig.DCam.

PC

STB

LivingRoom

Room#1

Room#3

Room#2

Kitchen

DoorPhone

WaterMeter

GasMeter

WiBEEM

MicrowaveOven

PC

PDA

DCam.

Printer

PCRoom

#4

DTV

PowerMeter

Meter Reader

DSLAM

Bath-room

UtilityRoom

WiBEEMWMC

ONU

VDSLMODEM

Washer

WiBEEM

WiBEEM WiBEEM

WiBEEM

WiBEEM

WiBEEM

WiBEEM

WiBEEMWiBEEM

Association Point

WiBEEM




• Full connectivity all over the house with a wireless network is not available due to dead zones of RF signals. Light switches and AMR devices are everywhere in the house. An energy-efficient wireless mesh network solution such as

WiBEEM is a solution to this problem. Home appliances equipped with WiBEEM module could

function as the WRCs (WiBEEM Routable Coordinator) that will allow the full connectivity.

If not, dedicated WRCs could be installed in proper places.

• The reduction of power consumption could be a critical issue for Wireless Home services. Healthcare watch worn on an elderly person’s arm should last

at least 2 years with 2 AA-batteries.

Characteristics of Wireless Home Service (1/3)




• Every home appliance reports its status to the mobile terminal, in a seamless manner.

• One WMC (WiBEEM Mesh Coordinator) will take care of all the traffics of MRCs, sensor nodes, and terminals.

• The Residential Gateway of the house could be the best position for the WMC.

• Association point seems to be always the same. The WMC appears to be the best Association point for each

incoming family member. The WMC is the best short address assigner, yet other WRCs

can also do the job.

• The limitation of the maximum number of children for any WRC limits the applicability of the protocol.





• Devices are moving. Reassociation should be avoided due to the fact that there can

be heavy unnecessary association request traffic. The network address shall be the same for any position.

• Traffic Directions Every traffic from both sensor nodes and the mobile terminal

is toward the WMC. The delivery of the information from the WMC to incoming

family members and sensors requires fast proactive routing.

• Some wireless home services require QoS aspects In-Home Healthcare Service Gas Valve Shut Down Service

• Disassociation request before leaving the network will be very important for address space reusability.





Overview of the WiBEEM Technology• A simple and robust protocol with small memory size

• Extremely long battery life enabled by synchronization over the mesh network via the use of scheduled beacons transmitted by the WMC and all of WRCs.

• Reliable data transfer from 250 Kbps to 16 Mbps.

• High-speed mobility supported upto 120 Km/hour.

• Prioritized/Parameterized QoS Supported.

• One-hop communication within 30 m and expandable to hundred meters via mesh network.

• Easy installation of sensors and routers due to wireless mesh connectivity

• Very low implementation cost




WiBEEM Protocol Stack

Higher Layer

WiBEEM NWK Layer

WiBEEM MAC Layer

WiBEEM Physical (PHY) Layer

Security NetworkMessage Broker

RoutingManagement

2.4 GHzRadio (Ch.1)

NLDE-SAP NLME-SAP

MLME-SAP

PLME-SAPPLDE-SAP

MLDE-SAP

NetworkManagement

2.4 GHzRadio (Ch.2)

2.4 GHzRadio (Ch.3)

2.4 GHzRadio (Ch.16)




PHY Overview of the WiBEEM • Data Rate

Each channel provides Min. 250 Kbps, and Max. 1 Mbps. Maximum 16 Mbps for Isochronous Data using 16 channels

• Channels Max. 16, Min. 1 channel in the 2.4GHz ISM band ACA (Adaptive Channel Aggregation) concept is used.

• Modulation O-QPSK and 16-QAM at 2.4GHz with AMC

• Coexistence with 802.11b DSSS and 802.11g OFDM of WLAN 802.15.1 FHSS of Bluetooth 802.15.3 DSSS of High-Rate WPAN 802.15.4 O-QPSK of Low-Rate WPAN and ZigBee




PPDU Format

PreambleSequence

Start ofFrame

Delimiter

FrameLength

MPDU (MAC Protocol Data Unit)

Octets: 4 1 1

SHR (Synchronization Header)

PHR ( PHYHeader )

PSDU (PHY Service Data Unit)

PPDU (PHY Protocol Data Unit)

8 to 127

• The transmission of largest PPDU packet requires 4.256 msec for the air interface. 133 × 8 × 4 µsec = 4.256 msec.




MAC Overview of the WiBEEM • Superframe consists of BOP, PQP, CAP, CFP and DSP.

• Multiple beacons in BOP are transmitted by WMC and all the WRCs, while WEDs do not transmit beacons.

• Low Power Consumption due to the Perfect Synchroni- zation all over the Network by using Beacon Scheduling

• Dynamic Channel Selection

• Network Topology Star and Peer-to-Peer Topology Cluster-tree Network Topology Beacon-enabled as well as Beaconless Mesh Topology

• 65,536 = 216 devices per MPID (Mesh Piconet ID)

• Data Security Support with AES-128 Security




WiBEEM Superframe Structure

BOP CAP CFP DSP

Beacon #1

SD (Superframe Duration)

BI (Beacon Interval)

BOPBOP = BTTSL × maxBeaconNumber [symbols]

SD = aBaseSuperframeDuration × 2SO [symbols]

= 960 × 2SO [symbols]

BI = aBaseSuperframeDuration × 2BO [symbols] = 960 × 2BO [symbols]

Beacon #1

Beacon #2

Beacon #n

PQP

PQPPQP = PQPL × aBaseDuration [symbols]

CFPCFP = CFPL × aBaseDuration [symbols]

BTTSL




Beacon Frame Format and Beacon Payload

FrameControl

BeaconSequenceNumber

Source Address

Information

SuperframeSpecification

CFPFields

PendingAddress

Field

BeaconPayload

FCS

1 4/10 2 k m Variable 2

MHR (MAC Header) MSDU (MAC Service Data Unit) MFR(MAC Footer)

Bits : 0-3

BeaconOrder

4-7

SuperframeOrder

8-11

Reserved

12

Battery lifeExtension

13

PQPEnabled

14

PANCoordinator

15

AssociationPermit

Octets: 2

Octets: 1

MaxBeaconNumber

1

BTTSL

1

Depth

2

NAA

2

ChildShort

Address

2

ParentShort

Address

2

LSV-ND

1

ChildDeviceType

1

MyProfile

ID

1

MyBTTS

0/1

PQPL

2

LSV-WMC




39

38

37

21

2223

24

25

2627

28

29

30

31

32

3335

36

34

20

19

18

1

2

34

5

6

7

8

9

WMC 10

11

12

13

14 1617

15

40

1

2

3

4

5

6

7

8

9

10

13

11

6

12

9

9

14

11

8

10

10

11

15 5

12

5

16

11 6

9

13

13

7

7

8

7

12

10

15

14

Beacon Scheduling Done for 40 Nodes

CFPPQP DSP1 2 3 4 5 6 7 8 9 10 1211 13 14 15 161 2 3 4 5 6 7

1011

8 9

12

13 14

15

16

17

18

192021

22 2324

25

26 27

28

29

30 31

32

33 34

35

36

37

38

3940

BTTSLBTTS

BOPCAP




NWK Overview of the WiBEEM • Network formation by passive and active scan

• Network growing support and easy network management

• Space Efficient, Real-Time Short Address Allocations Addressing mechanism based on NAA (Next Address

Available) algorithm for Efficient Address Space Usage The short address can be assigned in real-time.

• Low Latency Routing Mechanism WiBEEM uses proactive routing WiBEEM can also adopt simplified AODV-like routing

• Network Message Broker

• High speed device mobility and QoS supported.

• Data fragmentation supported.




NWK Layer General Packet Format

Octets: 2 0/1

FrameControl

2 2 0/2

TargetAddress

Origi-nator

Address

Max.BroadcastHop Count

BroadcastID Number

Routing Fields

NWK Header

Variable

FramePayload

2

TTL

0/1

Fragmen-tation

ID

Var

Fragmen-tationCount

Var

Fragmen-tation

Number

0/1

Fragmen-tation

Length

Bits : 0-1

FrameType

2-5

ProtocolVersion

6

DiscoverRoute

7

Fragmentation

9

Security

10-15

Reserved

8

MulticastFlag

Fragmentation FieldsNWK

Payload




Advantages of WiBEEM Addressing

• No waste of 16-bit address spaces.

• Device discovery done when the address is granted.

• The concept of NAA (Next Address Available) allows the complete reuse of the 16-bit address space when the node has been disassociated.

• Address conflicts may happen when two nodes join in the network at the same time.

• Reasonable delay for resolving the address conflicts.




WiBEEM Routing

• The NAA-based addressing does not allow tree routing because of the non-systematic addressing mechanism.

• The tree routing, however, limits the applicability of the protocol drastically. The number of new devices to join in. Device mobility

• WiBEEM routing algorithm Proactive routing with routing tables Does not support Tree routing. WiBEEM adopts simplified AOVD-like reactive routing when

the link failure occurs.




• Forward• Introduction• Chapter 1. Scope• Chapter 2. Normative References• Chapter 3. Terms, Definitions, and Abbreviations• Chapter 4. Conformance Clauses• Chapter 5. General Requirements• Chapter 6. PHY Service Specifications• Chapter 7. PPDU Formats • Chapter 8. PHY Constants and PIB Attributes• Chapter 9. General Radio Specifications• Chapter 10. Adaptive Modulation Coding for High Rate Support• Chapter 11. Adaptive Channel Aggregation

Structure of the WiBEEM Part 1: PHY




Structure of the WiBEEM Part 2: MAC• Forward• Introduction• Chapter 1. Scope• Chapter 2. Normative References• Chapter 3. Terms, Definitions, and Abbreviations• Chapter 4. Conformance Clauses• Chapter 5. General Requirements• Chapter 6. MAC Sublayer Service Specifications• Chapter 7. MAC Frame Formats • Chapter 8. MAC Command frames• Chapter 9. MAC Constants and MIB Attributes• Chapter 10. MAC Functional Descriptions• Chapter 11. MAC Sublayer Security Suite Specifications• Chapter 12. Message Sequence Charts




Structure of the WiBEEM Part 3: NWK• Forward• Introduction• Chapter 1. Scope• Chapter 2. Normative References• Chapter 3. Terms, Definitions, and Abbreviations• Chapter 4. Conformance Clauses• Chapter 5. General Descriptions• Chapter 6. NWK Service Specifications• Chapter 7. NWK Frame Formats • Chapter 8. NWK Command frames• Chapter 9. NWK Constants and NIB Attributes• Chapter 10. NWK Functional Descriptions• Chapter 11. NWK Security Suite Specifications




Conclusions • Introduced some Wireless Home Network Services.

• Presented WiBEEM technology for the energy efficient home network services Multiple beacons in one superframe, that are scheduled to

avoid beacon conflicts. Real-time, efficient short address allocation based on NAA. Device mobility supported. Prioritized/Parameterized QoS supported.

• WiBEEM Protocol is a user-friendly technology for Wireless Home Network Services.

• Korea wishs to submit the WiBEEM technology as a multi-part NP to be standardized under SC25/WG1.

ho-in jeon associate professor of dept. ee at kyung-won university, convener of iso/iec jtc1 sc6...

Documents

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