Two-Link Approximation Schemes for Loss Networks with Linear Structure and Trunk Reservation
نویسندگان
چکیده
Loss networks have long been used to model various types of telecommunication network , including circuit-switched networks. Such networks often use admission controls, such as trunk reservation, to optimize revenue or stabilize the behaviour of the network. Unfortunately, an exact analysis of such networks is not usually possible, and reduced-load approximations such as the Erlang Fixed Point (EFP) approximation have been widely used. The performance of these approximations is typically very good for networks without controls, under several regimes. There is evidence, however, that in networks with controls, these approximations will in general perform less well. We propose an extension to the EFP approximation that gives marked improvement for a simple ring-shaped network with trunk reservation. It is based on the idea of considering pairs of links together, rather than links in isolation, as does the EFP approximation, thus making greater allowance for dependencies between neighbouring links.
منابع مشابه
Product Form Approximations for Highly Linear Loss Networks with Trunk Reservation
Admission controls, such as trunk reservation, are often used in loss networks to optimize their performance. Since the numerical evaluation of performance measures is complex, much attention has been given to nding approximation methods. The Erlang Fixed Point Approximation, which is based on an independent blocking assumption, has been used for networks both with and without controls. Certain...
متن کاملA Comparison of Approximation Algorithms for Blocking Probabilities on Telecommunication System with Trunk Reservation Access Policy
It has widely known that the irreversible property of Markov chain representing the multirate multiservice loss system with Trunk Reservation policy is not satisfied. In this case, the well-known product form result for state probabilities cannot be applied. To obtain the exact state probabilities, one has to solve the balance equation of Markov chain that represents the system. But this is imp...
متن کاملAn Analysis of Multi - Service Systemswith Trunk Reservation Mechanisms
In this paper we consider a broadband system carrying diierent types of services. The transmission system is built by a set of links having a xed or quasi-stationary bandwidth, e.g. in the form of virtual paths arising in Asynchronous Transfer Mode networks. The bandwidth usage by diierent services of various bit-rates is organized in a complete sharing mode. We devote attention to two diierent...
متن کاملA Novel Protection Guaranteed, Quality of Transmission Aware Routing and Wavelength Assignment Algorithm for All-optical Networks
Transparent All Optical Networks carry huge traffic and any link failure can cause the loss of gigabits of data; hence protection and its guarantee becomes necessary at the time of failure. Many protection schemes were presented in the literature, but none of them speaks about protection guarantee. Also, in all optical networks, due to absence of regeneration capabilities, the physical layer i...
متن کاملImproving LoRaWAN Performance Using Reservation ALOHA
LoRaWAN is one of the new and updated standards for IoT applications. However, the expected high density of peripheral devices for each gateway, and the absence of an operative synchronization mechanism between the gateway and peripherals, all of which challenges the networks scalability. In this paper, we propose to normalize the communication of LoRaWAN networks using a Reservation-ALOHA (R-A...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Telecommunication Systems
دوره 19 شماره
صفحات -
تاریخ انتشار 2002