1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P 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: [ ], FAX: [ ],
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 P 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 P
Y. Jeon, S. Lee, J. Kim, S. Choi
<author>, <company>

2. Bridge Device (BDEV) for Mesh Network
<month year>
doc.: IEEE <doc#>
Bridge Device (BDEV) for Mesh Network
Youngae Jeon
Sangjae Lee
Jieun Kim
Sangsung Choi
ETRI
Y. Jeon, S. Lee, J. Kim, S. Choi
<author>, <company>

3. What is Bridge Device? Bridge Device Mesh Network
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

4. Mesh Network Configuration
Mesh Network Configuration
Piconets using different channels
Piconets using the same channel
Y. Jeon, S. Lee, J. Kim, S. Choi

5. 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

6. 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

7. Multi-channel Access of BDEV
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
PN 1
PN 2
PN 3
Y. Jeon, S. Lee, J. Kim, S. Choi

8. Operation Outline of BDEV
Operation Outline of BDEV
Scan
Association
Superframe
Synchronization
BDEV information
Announcement
Channel Time
Allocation
Data Transfer
Y. Jeon, S. Lee, J. Kim, S. Choi

9. Modified Header Fields for BDEV
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

10. 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

11. 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

12. Conclusion BDEV proposal Future works
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

13. Thank you for your attention!
Thank you for your attention!
IT R&D Global Leader
Y. Jeon, S. Lee, J. Kim, S. Choi