1. Concept of Relay 2. Concept of local forwarding relaying 3. Advantages for local forwarding relaying 4. Local forwarding relaying scenarios 5. Summary

1. Local forwarding relaying mode usage model
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16nrr-09/009r5
Date Submitted:
2009-03-11
Source:
Yi-Hsueh Tsai, Chih-Hsun (Anthony) Chou
Emerging Smart Technology Institute, Institute for Information Industry
5F., No. 133, Sec. 4, Minsheng E. Rd., Taipei City, Taiwan
Kanchei (Ken) Loa
Networks and Multimedia Institute , Institute for Information Industry
Whai-En Chen
National Ilan University (NIU)
Yung-Ting Lee, Hua-Chiang Yin
Coiler
Voice:
E-mail:
+886-2-27136682
lucas@iii.org.tw
Voice:
E-mail:
+886-2-66000100
loa@iii.org.tw
E-mail:
wechen@niu.edu.tw
E-mail:
yungting.lee@coiler.com.tw
Venue:
802.16 session #60
Base Contribution:
N/A
Purpose:
To present the local forwarding relaying mode model, which is of interest for NRR
Notice:
This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in
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2. Content
1.
2.
3.
4.
5.
Concept of Relay
Concept of local forwarding relaying
Advantages for local forwarding relaying
Local forwarding relaying scenarios
Summary

3. Concept of Relay
Aiming at developing relay based on IEEE 802.16e, to gain:
• Coverage extension
• Throughput enhancement
Mobile Access
RS
Multihop Relay
Coverage hole
RS
RS
Penetration into
inside room
Shadow of
buildings
RS
Coverage extension
to isolated area
RS
BS
RS
RS
RS
Coverage extension
at cell edge
RS
Valley between
buildings
Acronym:
BS: Base Station
RS: Relay Station
Underground
Source: 16j TG,
IEEE 80216j-06_015

4. Concept of local forwarding relaying
1. Local forwarding relaying procedure is
centralized controlled by the BS
2. Data traffic transfer only passes through RS
MMR-BS
Data transmissions
Control transmissions
RS-1
RS-2
RS-3
MS-2
MS-1
MS-3
Source: IEEE
S80216j-06/201r1

5. Concept of local forwarding relaying
3. Data transfer can go through multiple RSs
in multi-hop relay system
BS
Data transmissions
Control transmissions
RS-1
RS-2
RS-3
MS-2
MS-1
MS-3
Source: IEEE
S80216j-06/201r1

6. Advantages for local forwarding relaying
1. Bandwidth efficiency
–
–
–
Government applications
Military applications
Civilian applications
2. End-to-end delay minimization
–
–
–
Real-time applications (voice, video, …)
Public safety applications (vehicle safety issue)
Government applications (public safety for land
mobile vehicle, public services between main
island and small off-shore islands)

7. Local forwarding relaying scenarios 1:
Government Application
1. Public safety for
land mobile vehicle
2. Combine 802.16
technology with
802.11p to guaranty
vehicle safety at the
road intersection
3. High security,
protection, and
reliable network is
required
Park
Gas Station
School
802.16nrr RS
Bar
802.16
802.11p
Gas Station
802.16
Building
Hospital
Building
Warehouse
Factory

8. Local forwarding relaying scenarios 2:
Government Application
Public service/safety
between main island and
small offshore islands:
BS
1. Public services:
voice, video, files
transfer
Hospital
2. Publics safety:
surveillance,
emergency service
RS
Southeastern
coast of Taiwan
RS
MS2
SS
RS
Orchid
Island
MS1

9. Local forwarding relaying scenarios 3:
Military Application
1. Mobile user (e.g. soldier) communicates with
another mobile user within the same squad/platoon
RS
BS
Source: 16j TG, IEEE
S80216j-06/201r3

10. Local forwarding relaying scenarios 4:
Emergency/Recovery Situation
1. For emergency/recovery situation
Nomadic
RS
BS
MS1
MS2
Source: IEEE
S80216j-06/201r3

11. Local forwarding relaying scenarios 5:
Civilian Application: an office or factory
1. Two users are located inside the same RS converge
2. Radio resource efficiency can be improved since
data doesn’t need to be transferred to the BS
RS
BS
MS1
MS2
Source: 16j TG, IEEE
S80216j-06/201r3

12. Local forwarding relaying scenarios 6:
Civilian Application: among different RS cells
1. Two users are located inside the same multi-hop
relay coverage but different relays’ coverage
RS
RS
RS
BS
MS2
MS1
Source: 16j TG, IEEE
S80216j-06/201r3

13. Summary
1. Six scenarios for local forwarding relaying
mode are proposed in this contribution.
2. We suggest adopting the proposed local
forwarding relaying scenario
3. In order to enhance the scenarios and
features for local forwarding relaying mode,
future studies are necessary

14. Reference
1.
2.
3.
4.
5.
IEEE 80216j-06/015
IEEE S80216j-06/201r1
IEEE S80216j-06/201r3
IEEE C80216m-09/0373
IEEE C80216nrr-09/006