Jointly power and bandwidth allocation for a heterogeneous satellite network

Document Type: Research Paper

Authors

1 Department of Communication, College of Electrical Engineering,Yadegar-e-Imam Khomeini (RAH)Shahr-e-rey Branch, Islamic Azad University,Tehran,Iran.

2 Faculty of Electrical and Computer Engineering , Semnan University, Semnan, Iran.

3 Department of Communication, College of Electrical Engineering, Yadegar-e-Imam Khomeini (RAH) Shahr-e-rey Branch, Islamic Azad University, Tehran, Iran.

Abstract

Due to lack of resources such as transmission power and bandwidth in satellite systems, resource allocation problem is a very important challenge. Nowadays, new heterogeneous network includes one or more satellites besides terrestrial infrastructure, so that it is considered that each satellite has multi-beam to increase capacity. This type of structure is suitable for a new generation of communications, which leads to a specific benefit of using the available resource in wireless communication systems. The multi-beam technology is one of the multiple access methods for new satellite systems that are similar to very high throughput satellites systems. Therefore, in this paper, our proposed algorithm is mainly the jointly power and bandwidth allocation of satellite systems to each beam and it is simulated considering the limitation of the total transmission power and bandwidth constraints for any beams. Furthermore, a bandwidth sharing algorithm is provided to dedicate extra bandwidth among beams. Finally, the total capacity of our proposed system model, which is heterogeneous network is obtained based on some parameters such as frequency reuse, modulation rate and total number of users for each beam. This comparison shows that the proposed algorithm allows maintaining the optimal capacity allocation to use a new satellite network.

Keywords