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Fiber-wireless access network

Fiber-wireless access network. 指導教授：吳和庭教授 報告：江昀庭 2012/10/31. Outline. Introduction Optical-Fiber Network Passive Optical Network (PON) EPON Interleaved Polling with Adaptive Cycle Time ( IPACT) Dynamic Bandwidth Allocation (DBA) Fiber-wireless access network( Fiwi )

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Fiber-wireless access network

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  1. Fiber-wireless access network 指導教授：吳和庭教授 報告：江昀庭 2012/10/31

  2. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  3. Introduction

  4. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  5. Passive Optical Network (PON)

  6. Passive Optical Network (PON) • Optical line terminal (OLT) • Optical network units (ONUs) or Optical network terminals (ONTs) • Use broadcast on Downstream • Use TDMA on Upstream • All ONUs register to OLT with LLID

  7. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  8. EPON • REPORT and GATE message • REPORT • ONU to report its bandwidth requirements • OLT passes REPORT to the DBA algorithm • GATE • After executing DBA algorithm, OLT transmits GATE down-stream to issue up to four transmission grants to ONU • Transmission start time • Transmission length • Timestamp (used by ONU for synchronization)

  9. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  10. Interleaved Polling with Adaptive Cycle Time (IPACT) • OLT maintain a Table with Byte and RTT • First grant, G(1), is set to some arbitrary value • In polling cycle n, ONU measures its backlog in bytes at end of current upstream data transmission & piggybacks the reported queue size, Q(n), at end of G(n) • Q(n) used by OLT to determine next grant G(n+1) => adaptive cycle time & dynamic bandwidth allocation • If Q(n)=0, OLT issues zero-byte grant to let ONU report its backlog for next grant

  11. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  12. Dynamic Bandwidth Allocation • Fixed service • OLT issues each ONU grant of size MTW => constant cycle time & static bandwidth allocation • Limited service • OLT grants requested number of bytes, but no more than MTW • Credit service • OLT grants requested number of bytes plus either constant credit or credit proportional to request • Elastic service • OLT grants an aggregate maximum of N MTWs to N ONUs, possibly allocating it to single backlogged ONU

  13. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  14. Fiber-wireless access network(Fiwi) • Purpose to increase bandwidth for wireless users. • Using Optical backbone and Wireless at endpoint(terminal) i.e WIMAX, LTE, LTE-A • Communication by radio signal. It will use wireless protocol to transmit data.

  15. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  16. Radio over Fiber • In order to using wireless protocol, we need Radio over Fiber(RoF) on network. • It consist of Base station(BS) and Control station(CS) • BS change signal from wireless to optical, vice versa. • CS = modulation + demodulation + coding + routing

  17. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  18. Power saving on Fiwi • Minimize the number of active ONUs. • As possible as using recently wireless link. • Maximize the number of sleeping ONUs.

  19. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  20. Challenge • We need to consider the following points: • WOBAN topology can provide several redundant paths for a packet to reach its destination • Traffic load variation during different hours of the day. Thus, we can selectively put some nodes to a low-power (sleep) state during low-load hours, thereby reducing network power consumption • How to put an ONU to Sleep State • Need Mathematical Model to handle the traffic flow between a source–destination pair

  21. Outline • Introduction • Optical-Fiber Network • Passive Optical Network (PON) • EPON • Interleaved Polling with Adaptive Cycle Time (IPACT) • Dynamic Bandwidth Allocation (DBA) • Fiber-wireless access network(Fiwi) • Radio over Fiber • Power saving on Fiwi • Challenge • Conclusion

  22. Conclusion • Fiwi provides high bandwidth network but there has some problem to discuss • How to design an architecture • How to make balance between Fiber deployment cost and power saving • How to put an ONU to sleep (…DBA?) • How to select the wireless protocol

  23. Reference [1] BurakKantarci, MazenKhair, Hussein T. Mouftah“Power Saving Cluster for Energy-efficient,” IEEE 2010 [2] PulakChowdhury, Student Member, IEEE, Massimo Tornatore, SumanSarkar, and Biswanath Mukherjee “Building a Green Wireless-Optical Broadband Access Network (WOBAN),” JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 28, NO. 16, AUGUST 15, 2010 [3] Klaus Petermann, Adam Wolisz and Ralf Lehnert “Radio over Fiber based Network Architecture,” Berlin 2005 [4] Glen Kramer and Biswanath Mukherjee “IPACT: A Dynamic Protocol for an Ethernet PON (EPON),” IEEE Communications Magazine, February 2002

  24. Thanks for your listening To be continuous…

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  27. AnySee-系統架構圖

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