Light burst exchange network edge node structure and realizing method

Abstract

A light burst exchange network edge nodal structure includes a control packet, a light packet emit module, a WDM, an adaptive flow assembly module and a bias determining module, among which, the adaptive module is connected with the bias determining module then to join in the control packet emit module to be connected in the WDM to be transferred together with the light packet emit module, a control packet trigger module in the adaptive flow assemble module is connected into AAR(P) filter, I(n-1) and e(n) memory are also connected into the AAR(P) filter as the input, the output of AAR(p) is connected with a packet length determine module, output of which is linked to dynamic BAT decisive module.

Description

technical field [0001] The invention relates to a network structure and an implementation method used in the technical field of optical communication, in particular to an optical burst switching edge node structure and an implementation method based on dynamic self-adaptive assembly of real-time network services. Background technique [0002] The optical burst switching (OBS) network reduces the requirements for optical switches and optical buffers, can well support bursty packet services, and realizes large packet switching and transparent transmission under current optical technology conditions, and has become one of the hotspots in the field of optical communication research. one. It consists of several edge nodes and core nodes. The edge node is responsible for completing the interface with the traditional network. The ingress edge node assembles traditional electronic packets into bursts according to the requirements of the destination address and quality of service (Qo...

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Problems solved by technology

[0003] Found through the retrieval of prior art literature, edge node structure (Yi jun Xiong, Marc Vandenhoute, and Hakki C.Cankaya.Control Architecture in Optical Burst-Switched WDMNetworks, IEEE Journal on Selected Areas in Communications , 2000, 18(10): 1838-1850) continues to use the traditional circuit switching traffic mode, still adopts the assembly method of fixed packet length and time, and assembles and offset time bring additional delay, which cannot meet the requirements of burstiness and self-similarity of the data network; the existing edge node structure does not involve the fairness of distinguishing services, and different types of services in the network have different delay requirements, and high priority High-level services must guarantee a small delay, while low-priority services can tolerate relatively large delays, and it is meaningless to guarantee QoS without delay fairness; the traditional edge node structure only increases the additional offset time one-sidedly In order to ensure the QoS at the core node by distinguishing the priority of the business class through a large offset time, this greatly increases the delay of the entire optical network, and even loses the one-way reservation of the OBS network for a multi-hop, large-radius network The advantage of low latency; the assembly granularity in the existing edge node design is preset, which lacks flexibility for actual network traffic and increases overhead and latency

These limiting factors of the existing edge node structure increase the pressure on the core optical network, and the network throughput performance deteriorates. The offset time formation mechanism after traffic shaping increases the delay of the optical network, and also reduces the robustness of the optical network.

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