Comparison of resource allocation strategies for LTE basic stations from the point of view of using its throughput

DOI: 10.31673/2412-4338.2020.012532

Abstract

The transmission technique in radio communications has reached a high degree of perfection and has approached the theoretical limit. In these conditions, the task of maximizing the efficiency of using radio resources comes to the fore in mobile communications. Here, a scheduling system plays a significant role, which ensures the distribution of the base station (BS) bandwidth between mobile terminals. The requirements for the operation of the system are diverse. On the one hand, it is necessary to ensure maximum use of the resource. On the other hand, it is desirable to ensure a “fair” allocation of BS bandwidth resource between mobile terminals.
The work compares the efficiency of bandwidth usage of the base station of the LTE system for different strategies of the operation of the algorithms of the resource allocation system between mobile terminals, namely: a) maximizing the use of the throughput of the base station, b) equal distribution of the time-frequency resource between mobile terminals, c) equal throughput allocation between terminals. The implementation of strategy “a” leads to an unacceptable (extremely uneven) distribution of throughput between terminals. It is shown that the implementation of strategies “b” and “c” leads to a decrease in the use of the bandwidth of the base station (3-4 times). Implementation of distribution according to strategy “c”, which is more “fair” than implementation according to strategy «b», slightly reduces the use of bandwidth (from 30 to 25%).
It is concluded that the option of maximizing the minimum, that is, option «c», can be considered appropriate. In it, in comparison with the uniform distribution of the time-frequency resource, the “injustice” of resource distribution between the terminals is significantly reduced with a moderate decrease in the use of BS bandwidth.

Keywords: LTE, mobile network resource allocation, scheduling.

References
1. Miao G., Zander J., Won Sung K., Slimane Ben Slimane. (2016) “Fundamentals of mobile data networks”. Cambridge University Press, 304 р.
2. Dahlman E., Parkvall S., Skold J. (2016) “4G, LTE-Advanced Pro and The Road to 5G”. 3rd ed. Academic Press. 590 p.
3. Sesia S., Toufik I. (2011) “LTE – the UMTS long term evolution: from theory to practice” 2nd ed. John Wiley & Sons. 752 p.
4. Capozzi F. Piro G., Grieco L.A., Boggia E. G., Camarda P. (2013) “Downlink Packet Scheduling in LTE Cellular Networks: Key Design Issues and a Survey”. IEEE Communications Surveys & Tutorials. Vol. 15, No.2. P. 678 - 700. DOI:10.1109/SURV.2012. 060912.00100.
5. Gadam M. A., Miajama’a L., Usman I.H. (2013) “Review of resource allocation techniques for throughput maximization in downlink LTE”. Journal of Theoretical and Applied Information Technology. ISSN: 1992-8645. Vol. 58, No.2. P. 413 – 420.
6. Ahmad A., Berg M.T., Ahmad S.N. (2015) “Resource allocation algorithms in LTE: A comparative analysis”. IEEE Conference Paper, New Delhi, India, 17-20 Dec. 2015. DOI: 10.1109/INDICON.2015.7443115.
7. Kwan R., Leung C., Zhang J. (2010) “Downlink Resource Scheduling in an LTE System”. Mobile and Wireless Communications Physical Layer Development and Implementation, S. Fares and F. Adachi (Ed.), InTech, Chapter 11. P. 189 – 207. DOI: 10.5772/7687.
8. Mamman M., Hanapi Z.M., Abdullah A., Muhammed A. (2019) “Quality of Service Class Identifier (QCI) radio resource allocation algorithm for LTE downlink”. PLOS ONE. Jan. 25 2019. 22 p. DOI:10.1371/journal.pone.0210310.
9. Mohseni M. Banani S., Eckford A., Adve R. (2019) “Scheduling for VoLTE: Resource Allocation Optimization and Low-Complexity Algorithms”. IEEE Transactions on Wireless. Vol. 18, No.3. P. 1534 - 1547. DOI: 10.1109/TWC.2019.2892128.