OBS network is a optical communication network. Data is transported in variable sized units called Bursts. Dynamic nature leads to high network adaptability and scalability. Promising solution for all optical network. Overcomes the complexity of OPS & OCS.

1. WELCOME

2. Optical Burst Switching

3. Outline
 Introduction
 OPS
 OCS
 Optical
Burst Switching
 Characteristics
 Purpose
 Advantages
 Disadvantages
 Conclusion

4. Introduction
 OBS
network is a optical communication
network.
 Data is transported in variable sized units
called Bursts.
 Dynamic nature leads to high network
adaptability and scalability.
 Promising solution for all optical network.
 Overcomes the complexity of OPS & OCS.

5. OCS (Optical circuit switching)
Light paths are set up between source and
destination nodes
 No statistical multiplexing
 Inefficient bandwidth utilization when carrying
bursty traffic


6. OPS (Optical packet switching)
High bandwidth utilization due to statistical
multiplexing
 Need to buffer packets at intermediate nodes
 Not feasible in the near future


7. OPTICAL BURST SWITCHING

Optical network technology.

Implemented using WDM .

Used in core network and viewed as a feasible
compromising b/w OPS & OCS

8. OBS Concept

9. Characteristics
Resources are allocated by using one-pass
reservation.
 Burst switching does not require buffering
inside the core network.
 Hybrid approach.
 Variable length bursts.


10. OBS Building Blocks



Burst assembly: assembly of client layer data into
bursts
Burst reservation protocols: end-to-end burst
transmission scheme
Burst scheduling: assignment of resources at individual
nodes

11. Purpose



To dynamically provision sub-wavelength
granularity by optically combining electronics
and optics.
Used for realizing dynamic end-to-end all
optical communication.
One of the benefit of burst aggregation is it
shapes .

12. Advantages
More efficient band width utilization
 Remove throughput limitation.
 Reducing processing requirements.
 Core network energy consumption


13. Disadvantages
 In
efficient utilization of resources
 Dependence on speed
 Faces two technological bottlenecks
 Noise accumulation

14. Conclusion
Optical communication network.
 Efficient way to resolve the problem of
congestion that internet suffering from.


15. Thank you…