Router Resource Management Research

摘要

In modern competitive conditions the telecommunications technologies and systems are constantly under improvement to ensure a better quality of service (QoS) as is required by the total aggregate services (multiservice) as well as increasing requirements of the users. Due to that efficient performance of the network nodes is extremely important for service providers. It is possible to describe the following tasks: the management of the optimal communication channels, their bandwidth capacity, protocols' selection, the router's memory, and the processes management. The traffic management methods in the information technology (IT) are based on the conventional procedures, such as: Traffic Shaping, CB Policing, GCRA and similar [1]. Queuing control mechanisms {WFQ, CBWFQ, WRR) are used in the flow packets for the equivalent resource allocation algorithms, e.g. max-min fair-share allocation, GPS, and others. The routing protocols RIP, OSPF, IS-IS, BGP in the IT equipment use minimum path determination methods [2]. These methods do not assess real time flow dynamics and this leads to routing flow anomalies in the transit and marginal IT nodes. It can be avoided installing the priority flows recalculation in the IT nodes in the real-time by assessing the state of the current IT node (e.g. the occupation of the input/output packet buffers, service packet duration, and the processor computing capability). The random Markov processes are usually used to describe the IT node resources dynamic properties. This solution requires substantial computing resources with complex technical implementations. It is known that the key resources for the IT nodes are the input/output packets' buffer capacity and computing resources. They can be generally evaluated as the resource value depending on their use coefficients. Therefore, the effective models can be applied for the IT resource management component analysis, i.e. evaluating resource value, which is variable, depending on the supply and the demand at current time [3]. The objective of this work is to investigate application of stability conditions in the routers taking into account the variable delay time.