A Frequency Reuse Scheme Based on Interference Pre-Cancellation and Resource Scheduling for Multi-Beam Satellite Downlink Signal

2014 ◽  
Vol 548-549 ◽  
pp. 1085-1088
Author(s):  
Yi Nuo He ◽  
Wei Zheng ◽  
Bin Li ◽  
Ya Zhe Gao ◽  
Jian Jun Wu
Keyword(s):  
Spectral Efficiency ◽  
Scheduling Algorithm ◽  
Resource Scheduling ◽  
Satellite System ◽  
Frequency Reuse ◽  
System Capacity ◽  
Channel Interference ◽  
High Spectral Efficiency ◽  
Downlink Signal

A frequency reuse scheme is proposed in this paper for multi-beam satellite system to improve spectral efficiency as well as system capacity. Firstly, in order to reuse same channel among beams, Tomlinson-Harashima precoding (THP) is introduced to pre-cancel downlink interference of users from different beams. Secondly, a resource scheduling algorithm is proposed to jointly work with THP. Finally, simulations are executed to validate the proposed scheme, which suggest that compared to traditional frequency reuse scheme, the proposed frequency reuse scheme can successfully eliminate co-channel interference with a high spectral efficiency.

scholarly journals New framework for interference and energy analysis of soft frequency reuse in 5G networks

2020 ◽  
Vol 9 (5) ◽  
pp. 1941-1949
Author(s):  
Achonu Adejo ◽  
Osbert Asaka ◽  
Habeeb Bello- Salau ◽  
Caroline Alenoghena
Keyword(s):  
Cellular Networks ◽  
Spectral Efficiency ◽  
Network Performance ◽  
Base Station ◽  
Frequency Reuse ◽  
Base Stations ◽  
System Capacity ◽  
Management Technique ◽  
5G Networks ◽  
Soft Frequency Reuse

Cellular networks are expanding massively due to high data requirements from mobile devices. This has motivated base station densification as an essential requirement for the 5G network. The implication is obvious benefits in enhanced system capacity, but also increased challenges in terms of interference. One important interference management technique which has been widely adopted in cellular networks is frequency reuse. In this article, an analysis is presented based on network interference and energy expended by base stations in downlink communication when Soft frequency reuse (SFR) is deployed. A framework is presented that captures the bandwidth overlaps in SFR across base station assignments, computes the interference probabilities arising and derives new performance equations which are verified using simulations. Results show an improvement of over previous SFR implementations that do not consider the interference probabilities. Thus, a more in-depth and accurate modelling of SFR in 5G networks is achieved. Furthermore, the downlink power allocation is investigated as against other parameters like the center ratio and edge bandwidth. The result shows that signal-to-interference-noise ratio (SINR) and spectral efficiency give different performance under energy consideration. A framework is developed on how to tune a base station to achieve desired network performance in user SINR or cell spectral efficiency depending on the operator’s preference.

Downlink and Uplink Resource Allocation in LTE Networks

2016 ◽  
pp. 199-233
Author(s):  
Johann Max Hofmann Magalhães ◽  
Saulo Henrique da Mata ◽  
Paulo Roberto Guardieiro
Keyword(s):  
Resource Allocation ◽  
Spectral Efficiency ◽  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Complex Task ◽  
Lte Networks ◽  
Allocation Process ◽  
High Spectral Efficiency ◽  
Resource Allocation Process

The design of a scheduling algorithm for LTE networks is a complex task, and it has proven to be one of the main challenges for LTE systems. There are many issues to be addressed in order to obtain a high spectral efficiency and to meet the application's QoS requirements. In this context, this chapter presents a study of the resource allocation process in LTE networks. This study starts with an overview of the main concepts involved in the LTE resource allocation, and brings two new proposals of scheduling algorithms for downlink and uplink, respectively. Simulations are used to compare the performance of these proposals with other scheduler proposals widely known and explored in the literature.

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