Efficient Power Allocation in HetNets

• Published in: Wireless personal communications Vol. 134; no. 2; pp. 597 - 624
• Main Authors: Naidu, Kalpana, Sathya, Vanlin
• Format: Journal Article
• Language: English
• Published: New York Springer US 2024; Springer Nature B.V
• Subjects: Cellular communication; Channels; Communications Engineering; Computer Communication Networks; Engineering; Iterative algorithms; Networks; Optimization; Resource allocation; Shopping malls; Signal strength; Signal,Image and Speech Processing; Heterogeneous Networks; Resource allocation; Throughput; LTE; 5 G; 6 G; Complexity
• ISSN: 0929-6212; 1572-834X
• DOI: 10.1007/s11277-024-10878-x

Cellular coverage plays an important role in throughput enhancement. So as to increase coverage especially in the dead spots of corporate buildings and shopping malls; ‘G’ number of micro cells (or Femtocells) are installed. These micro cells operate on both the licensed LTE spectrum and WiFi’s unlicensed spectrum in LTE-U mode. In this mode, out of 40 mSec time, WiFi Access Point utilizes the channels of unlicensed spectrum for some amount of time and for the remaining time (= T); ‘G’ micro cells adopt these channels. For all the channels used by micro cells, powers are assigned that endeavour to optimize the total throughput of ‘G’ micro cells. Further, because of allotted powers, sustainable interference only is to be created to the data sent from macro cell and other micro cells. Moreover, all the users of micro cells have to get enough signal strength from their corresponding micro cells. Besides, the throughput of the micro cells needs to exceed the desired limit. Hence, the foregoing resource allocation is tagged with ‘Resource Allocation in FemTocells’ (RAFT). Here, average powers are measured with closed-form solution and using these average powers, optimal solution is produced for the RAFT with computational overhead that is considerably lower than that of the prevailing ‘conventional iterative algorithms’ by a factor of O(10 5 ).