Efficiency estimation of satellite telecommunication system with on-board implementation of DAMA
Journal Title: Вісник НТУУ КПІ. Серія Радіотехніка, Радіоапаратобудування - Year 2014, Vol 0, Issue 58
Abstract
Introduction. Satellite is often used as an access network in convergent multimedia communications, where multimedia and real-time services are supported by return channels. Demand assigned multiple access (DAMA) applied for efficient assignation of limited resource of satellite return channel. On-board signal processing gives a lot of functional benefits for satellite systems and can be used as possibility to implement DAMA mechanism on satellite. Theory part. Simplified algorithm of dynamic resource allocation presented which is equivalent for both inside Network Control Center (NCC) and on-board implementations of DAMA. Realization of algorithm is based on information about transmission buffers load of each terminal station. Experimental part. Imitation model of return satellite channel with DAMA was developed and tested. Average buffers load and performance of channel level were chosen as characteristics to compare systems with NCC and on-board DAMA implementation. These characteristics were measured for different available return channel capacity. Conclusions. Experiments showed significant average buffer load reduction and 5-6% performance gain for on-board implemented DAMA model comparing to traditional realization. However, model of DAMA mechanism has drawbacks (bit representation of data, physical layer constraints are not considered for resource allocation granularity) and it should be improved for more precise results.
Authors and Affiliations
S. Kashuba
Keywords
Related Articles
- EP ID EP308892
- DOI 10.20535/RADAP.2014.58.67-74
- Views 80
- Downloads 0
Influence of the directional coupler’s parameters on the characteristics of Butler matrix 4×4
Introduction. A brief description of the Butler matrix operating principle and structure is given. The purpose of the study is defined and justified. Mathematical model of Butler matrix. The overall scattering matrix of...
Finite element modeling in impedance tomography
The accurate modeling of finite element for solving of direct and inverse task are built.
QAM signal normalization by results of it demodulation with Kalman's error minimization
Introduction. The processes of signal processing in the quadrature demodulator, and the problem of input signal AGC and carrier sync PLL are considered for a relatively high speed modulation conditions. Main part. The ba...
Direct digital method of the correlation-interferometric radio direction-finding with reconstructing of spatial analytical signal
In this paper, a new direct digital method of the correlation-interferometric radio direction-finding with reconstructing of spatial analytical signal is designed. Proposed method due to the previous parallel spatial sel...
Computation method оf minimal cut sets for fault-tolerant systems based оn structural-automatic model
Introduction. The сomputation method of minimal cut sets for fault-tolerant structures based on structural-automatic model is presented in this work. Method. The first step of this method is the development of binary str...