This document proposes a scalable architecture for video-on-demand (VOD) delivery over Ethernet passive optical networks (EPONs). It uses single copy broadcast in the downstream direction to broadcast videos from the optical line terminal (OLT) to optical network units (ONUs). Each ONU contains a storage unit that can cache broadcasted videos. When a user requests a video, the ONU checks its local storage first before forwarding the request to the OLT. This allows popular videos to be served directly from ONU storage, reducing bandwidth usage and improving performance.

1. Presented by,
Nadeem Najeeb

2.  INTRODUCTION
 BACKGROUND
 EXISTING SYSTEM
 CACHE SCHEME
 SYSTEM ARCHITECTURE
 DETAILS OF THE PROPOSED SCHEME
 1) OPERATION IN ONU’s
 2) OPERATIONS IN STORAGE
 3) OPERATIONS IN THE OLT
 PERFORMANCE ANALYSIS
 ADVANTAGES
 FUTURE WORK & CONCLUSION

3.  VOD needs a huge bandwidth to deliver data in a
real-time network
 Ethernet passive optical networks(EPONs) provide a
low-cost and high-speed solution.
 Here proposing a scalable architecture based on an
EPON.
 Using single copy broadcast in the downstream
direction and a special caching mechanism

4.  Video on demand (VOD) has a prominent role among
the various multimedia applications
 The major challenge in a VOD system is to deliver an
enormous amount of data in a real-time network.
 Using delayed server response and multicast can
improve the system performance.

5.  Multicast schemes such as patching, periodic
broadcast, batching, and Mcache, are proposed to
improve performance.
 The disadvantage of these schemes is the need for
large buffer space in client devices.
 A huge amount of bandwidth and server resources are
wasted in this scheme.

6.  Here we develop a new scalable architecture to
deliver the VOD traffic in an EPON.
 Single copy broadcast (SCB) to broadcast videos
from the OLT to ONUs.
 Each ONU consists of a storage unit that can store the
broadcasted videos

7. DETAILS OF LOGICAL LINK IDENTIFIERS
 The IEEE 802 architecture defines a shared medium and
point-to-point (PtP) medium.
 Ethernet network devices attached to the PON medium
implement a LTE function.
 The EPON system works by verifying the LLID at the ONUs
and the OLT.

8.  When a user requests a video via an ONU, this request is
received by the ONU.
 This kind of request is best effort (BE) traffic.
 When the ONU receives the packet, it then forwards the
video data to the user and the user can watch the movie.
 Multi-service operator (MSO) takes advantage of caching
VOD content.

9.  In this architecture, we exert an ONU that can
support the routing table function in the network
layer.
 The ONU’s hardware should be redesigned to be able
to analyze the packets.
 It prevent sending the request for the same stream to
the OLT for future requests.

11.  The storage unit consists of a micro processing unit
(MPU), storage and a controller.
 MPU is used to process VOD service packets
independently.
 The controller consists of several functions and
algorithms to control the operation of the storage.

12. read(name,buffer)
add(header)
send(user_mac)
search(name)
forward(request)
extract
search(name)
remove(header)

13.  The OLT sends the packet with the source of the VOD
server to the ONUs, with a broadcast LLID via the SCB
port.
 In this manner, all of the ONUs will receive the data
(movie) without requesting the movie, and they can save
this data for future requests.
 It can help the whole system to save the feeder fiber
bandwidth, especially in the situation of a high network
load.

14. The system performance is
analyzed under different
DBA schemes
Interleaved Polling with
Adaptive Cycle Time
(IPACT)
Dynamic bandwidth
allocation with multiple
services (DBAM)

15.  Traffic Localization
 Mean Packet Delays
 EF Jitter
 System Throughput
 Fairness
 Packet Loss

16.  System throughput in our architecture is scalable and
increases.
 EF jitter improves compared with the current PON
architecture.
 It can reduce packet loss in high traffic loads.
 It is cheaper.

17.  Proposed a new architecture to change the route of VOD
requests.
 The request is sent to the OLT if it does not exist in the
storage.
 In this approach, each movie is sent from the VOD server
to all the ONUs once

18.  [1] Cisco, “Cisco visual networking index: Forecast and
 [2] K. M. Ho, W. F. Poon, and K. T. Lo, “An evolutionary
video
assignment optimization technique for VOD system in
heterogeneous environment,”
 [3] J. Choi, M. Yoo, and B. Mukherjee, “Efficient video-on-
demand streaming for broadband access networks,” J
 [4] S. Farhad, M. M. Akbar, and M. H. Kabir, “Multicast
video-on-demand service in an enterprise network with
client
 [5] multicast true VoD service,” Multimedia Tools
Applicat., vol. 26, no. 1, pp. 101–122, May 2005.

19. QUESTIONS..???

20. THANK YOU…