RESEARCH ON QUALITY OF SERVICE PARAMETERS FOR PHOTONIC TRANSPORT NETWORKS
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2014, Vol 796, Issue 2014
Abstract
Designing the photonic transport networks is the task of great complexity, because of variety traffic queues should be transmitted with different priorities. Task of dynamic supporting the different quality of service (QoS) requirements during transmission over optical channel is even more complex. The most significant aspect for effective transport network designing from economic point of view is the network parameters optimization. In general, the methods and models for quality parameters estimation, developed in teletraffic theory are useful for packet networks as well. However, the complexity of photonic transport network and tremendous traffic intensity sufficiently decrease the performance of existing estimation methods. Therefore, developing the new methods for (QoS) parameters estimation is an actual task for modern photonic transport networks. The most interesting research object in photonic transport networks is edge node, which is responsible for traffic aggregation from different access networks such passive optical networks, regional ring networks and wireless access networks (GSM, UMTS, LTE). During traffic aggregation the multiple queues with different priorities and QoS requirements must be processed in edge node. This paper148 considers the queuing system with three types of service: voice over IP (VoIP), IPTV and data over IP (DoIP). Theoretical simulation for edge node of photonic transport network was provided by using mathematical fundamentals of queuing theory. Simulation is simplified by total queue decomposition onto several independent single channel queues system M/G/1. These queues processed separately and simultaneously. Thus, for edge node analyzing the prioritized M/G/1 with non-uniform packets income is used as basic queue model. However, using this model is very difficult for complex structures with ring topology. Therefore, the diakoptic method proposed for analysis of photonic transport networks. This method assumes tensor representation of analyzed network parameters. By using diakoptic method the edge node divides onto several subsystems, which must be completely isolated from each other. It is necessary to avoid any connectedness between these subsystems in order to eliminate influences between separated subsystems. This approach allows analyzing of each subsystem independently. During the analysis of each subsystem all interconnected loops inside are eliminated. Thus, no connections are left between analyzed subsystem and others subsystems, from which it is possible to determine interrelation between them. Namely, it assumes that separated branches are not belonging to any basic subsystem. Since these branches cannot be neglected, they affiliated to additional subsystem, which are created for them. After that, each subsystem analyzed independently by creating and solving the system of equation called – circle of intersections. Proposed method assembly separated procedures in proper sequence for analyzing the photonic transport network with complex structure. Diakoptic allows simplifying the complex network analysis, by separate calculation for elementary branches. Simulation results prove the advantage of diakoptic method. Precision of diakoptic method for average traffic intensity and complex network structure is 83 %, while for classic queues models precision is just 21 % for similar network conditions.
Authors and Affiliations
Mykola Kaidan, Stepan Dumych, Taras Maksymyuk, Roman Burachok, L. Hotra
Keywords
Related Articles
- EP ID EP459733
- DOI -
- Views 135
- Downloads 0
OPTIMIZATION OF TOPOLOGY TRANSMISSION NETWORK MOBILE COMMUNICATION WITH TAKING INTO ACCOUNT CONFLICTING QUALITY PARAMETERS
To meet the put forward contradictory technical and economic demands to the structure of transmission networks it is necessary to use multi-criteria optimization methods when planning them. During our planning of a trans...
THE THEORETICAL ASPECTS AND PRACTICAL FEATURES MULTI-OBJECTIVE OPTIMIZATION OF PROCESSES TO ENSURE THE QUALITY OF REE AT THE MANUFACTURING STAGE
One of the most important scientific and technical problems is to ensure the quality and reliability of technical objects. In this paper the theoretical and practical aspects of modeling and optimization of quality assur...
THE QUESTION OF LINE-WAVEGUIDE JUNCTION WITH CONDUCTING EXCITER ELEMENT OPTIMIZATION
The given paper is based on the line/waveguide junction synthesis algorithm. The recommended there calculation expressions satisfy the loss free and tuning conditions for junction unit. The corresponding calculation form...
RESEARCH OF THE FREQUENCY PLANNING METHODS FOR CELL NETWORKS BASED ON LTE AND GSM TECHNOLOGIES
Modern researches in field of mobile network depend on network infrastructure in a specific region. Nowadays, the actual issue is reforming of the existing frequency range for LTE deployment. The most common band is 900/...
ENHANCEMENT OF ACTIVE MEDIUM PUMP EFFICIENCY FOR A DISTRIBUTED FEEDBACK WAVEGUIDE LASER
On the basis of dielectric gratings, in which dielectric permittivity can be complex, and the imaginary part can be both positive and negative, waveguide microlasers are developed. The advantage of waveguide microlasers,...