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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Bridge Device for Mesh Network] Date Submitted: [16 Sep., 2005] Source: [Youngae Jeon, Sangjae Lee, Jieun Kim, Sangsung Choi] Company [ETRI]

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

Submission Title: [Bridge Device for Mesh Network]

Date Submitted: [16 Sep., 2005]

Source: [Youngae Jeon, Sangjae Lee, Jieun Kim, Sangsung Choi] Company [ETRI]

Address [161, Gajeong-dong, Youseong-gu, Daejeon, Korea]

Voice: [+82-42-860-1564], FAX: [+82-42-860-5218], E-Mail: [[email protected], [email protected], [email protected], [email protected]]

Abstract: [The document describes a bridge device enabling multi-hop communications between devices in different piconets by using power save mode.]

Purpose: [The technology for increasing resource utilization and avoiding collision is an important aspect for future Mesh networks. We present a bridge device enabling multi-hop communications between devices in different piconets by using power save mode. This bridge device associates piconets using mutually independent channel and joins PS (power save) sets by considering the mesh network environment such as the number of piconet associated and the traffic of each piconets. This method enables devices in mesh networks to avoid collision and increase resource utilization]

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.

Y. Jeon, S. Lee, J. Kim, S. Choi

bridge device bdev for mesh network

Bridge Device (BDEV) for Mesh Network

Youngae Jeon

Sangjae Lee

Jieun Kim

Sangsung Choi

ETRI

Y. Jeon, S. Lee, J. Kim, S. Choi

what is bridge device
What is Bridge Device?
  • Bridge Device
    • Enables communication between devices in different piconets
  • Mesh Network
    • Consists of piconets using same channel, or
    • Consists of piconets using different channels

Y. Jeon, S. Lee, J. Kim, S. Choi

mesh network configuration
Mesh Network Configuration

Piconets using different channels

Piconets using the same channel

Y. Jeon, S. Lee, J. Kim, S. Choi

issues of piconets using the same channel
Issues of Piconets Using the Same Channel
  • If mesh network consists of multiple child piconets using the same channel, CTA utilization is limited
  • CTA utilization affects the expansion of mesh network

Y. Jeon, S. Lee, J. Kim, S. Choi

issues of piconets using different channels
Issues of Piconets Using Different Channels
  • If mesh network consists of multiple piconets using different channels, CTA utilization can be increased
  • BDEV should support multi-channel access among different piconets
  • BDEV communicates with other piconets only in the wake beacon
  • All devices in the same piconet including BDEV communicate with each other using both the wake beacon and other beacons

Y. Jeon, S. Lee, J. Kim, S. Choi

multi channel access of bdev

PN 1

PN 2

PN 3

Multi-channel Access of BDEV
  • BDEV can support the multi channel access using mechanism such as :
    • Superframe synchronization between piconets in the different channel
    • Pseudo power save mode

Y. Jeon, S. Lee, J. Kim, S. Choi

operation outline of bdev
Operation Outline of BDEV

Scan

Association

Superframe

Synchronization

Channel Time

Allocation

BDEV information

Announcement

Data Transfer

Y. Jeon, S. Lee, J. Kim, S. Choi

slide9

Modified Header Fields for BDEV

  • MAC header contains the field such as :
    • SrcID indicates the initiating source DEVID
    • DestID indicates the final destination DEVID
    • SrcPNID indicates the PNID of SrcID
    • DestPNID indicates the PNID of DestID

Y. Jeon, S. Lee, J. Kim, S. Choi

modified ie fields for bdev
Modified IE Fields for BDEV
  • Overall capability field is modified to include BDEV capability field
  • BDEV capability field consists of BDEV rating, Max association piconets, and Buffer size fields
    • BDEV rating : DEV desired mode, security, aux power, etc.

Y. Jeon, S. Lee, J. Kim, S. Choi

newly added ie fields for bdev
Newly Added IE Fields for BDEV
  • New information field includes one or more piconet information blocks
  • Each Piconet information block is used to inform devices of specific piconet to other device(s) of other piconet(s)

Y. Jeon, S. Lee, J. Kim, S. Choi

conclusion
Conclusion
  • BDEV proposal
    • Enable multi-hop communications between devices in different piconets
    • Associate piconets using mutually independent channel and join PS (power save) sets
    • Enable devices in mesh networks to avoid collision and increase resource utilization
  • Future works
    • Superframe synchronization mechanism
    • Effective Channel time allocation
    • More detailed information elements

Y. Jeon, S. Lee, J. Kim, S. Choi

slide13
Thank you for your attention!

http://www.etri.re.kr

IT R&D Global Leader

Y. Jeon, S. Lee, J. Kim, S. Choi

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