A Novel Resource-Optimized Parallel Descrambling Structure for Optical Backbone Transmission Network

Abstract

High speed of optical backbone transmission network makes descrambling at receivers a challenge. Considering the limit process frequency of general hardware device, parallel structure is used in descrambling. The general parallel descrambling structure (GPDS) uses too many multi-level xor operations which are complex and may cause delay to affect the hardware performance. To reduce system complexity, we have designed a memory-based parallel descrambling structure (MPDS). MPDS usually covers a large amount of memory. To overcome the shortcomings of GPDS and MPDS, a novel resource-optimized parallel descrambling structure (ROPDS) is proposed. Evaluation results show that ROPDS reduces the complexity of parallel descrambling, improves the hardware performance, and makes the most effective use of the logic and memory resource.