OCDMA Add/Drop Multiplexer of Self-Healing Rings/Ultrafast Multidimentional Optical CDMA Networks

Abstract

Self-healing ring architectures provide high survivability and ensure service availability. Many telecommunication infrastructures in metropolitan and local area networks are implemented with such architectures, and those networks are guaranteed to have 60 ms or less restoration time against link failure. Though optical code-division multiple access (CDMA) is conventionally implemented in broadcast star networks, this technique's unique properties such as large cardinality and soft blocking, provide many advantages when implemented in a ring architecture. First of all, the designed code cardinality is always much larger than the number of subscribers. With large cardinality, a survivable ring network can be built such that there is no need to reserve separate bandwidth or a separate path for link failure. Compared to WDM network that reserves separate wavelengths and TDM network that reserves separate time slots for link failure, optical CDMA ring network is more bandwidth efficient since it can support both links in the ring network to their maximum capacity. Also, full connectivity between nodes is possible without code switching. Secondly, the soft blocking property of optical CDMA allows the addition of subscribers without any hard limit, and new subscribers are easily added to the network without modifying the existing hardware. Thirdly, code-based transmission provides truly asynchronous access capability. The signal is identified with a unique code sequence, so there is no need to distribute a global clock signal in a separate channel for temporal synchronization. Furthermore, full transmission is guaranteed for each node without waiting for the designated transmission time slot. Fourthly, optical CDMA allows heterogeneous data types to coexist in the same link, thus maximizing quality of service in the network.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA531091

Entities

People

  • Paul Prucnal

Organizations

  • Princeton University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Amplitude
  • Code Division Multiple Access
  • Communication Systems
  • Computing System Architectures
  • Data Rate
  • Electro-Absorption Modulators
  • Laser Diodes
  • Lasers
  • Modulation
  • Modulators
  • Multiple Access
  • Network Architecture
  • Networks
  • Probability
  • Ring Networks
  • Signal Processing

Fields of Study

  • Computer science

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Computer Networking
  • Radio communications and signal processing.