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Scheduling is very important in real time environment, where users must be provided services by considering factors like QoS and channel quality. A novel analysis on the performance of downlink packet scheduling algorithms in Long Term Evolution (LTE) networks is presented. LTE with multimedia traffic is modelled with Network Simulator (NS-3) in compliance to 3GPP specifications. This paper analyses...
Sparse code multiple access (SCMA) is a new frequency domain non-orthogonal multiple-access technique which can improve spectral efficiency of wireless radio access. With SCMA, different incoming data streams are directly mapped to codewords of different multi-dimensional cookbooks, where each codeword represents a spread transmission layer. Multiple SCMA layers share the same time-frequency resources...
Recently the use of mobile devices is increasing and mobile traffic is growing rapidly. In order to deal with the massive traffic, cognitive radio (CR) is applied to efficiently use the limited spectrum resources. In this paper, we propose a CR operational algorithm for mobile cellular systems, which is applicable to the multiple secondary user environment. Performance of the proposed algorithm is...
The paper presents the lessons learned during the test activity of LTE network in Telecom Italia Lab. The issues mainly regard the lack of low cost and flexible monitoring and test platforms easy to reconfigure and adapt to the diverse network interfaces. The paper presents the design guideline for the development of FPGA-based devices able to overcome the presented issues. Exploiríng the NetFPGA...
The challenge of removing redundant handover (HO) has gained more importance after the existence and deployment of femtocell in the network. By nature, the existence of femtocell can lead to the increase of handover initiation. However, 3GPP standard provides Mobility Robustness Optimization (MRO) to optimize handover performance. MRO is a use-case for Self-Organizing Network (SON). The conventional...
Relaying is a promising solution to increase the capacity and improve the experience of users in LTE-A networks. Nevertheless, inter-cell interference coordination (ICIC) and resource sharing among different nodes and links are important challenges in order to obtain a real benefit from relay deployments. This paper focuses on Type 1 half-duplex inband relaying. Several strategies related to resource...
Long-term evolution (LTE) and multiple input multiple output (MIMO) have earned reputations to be a cutting-edge technology, which can boost significantly wireless communication performances. The paper aims at providing LTE MIMO performances in indoor environments and, therefore, guidelines for network operators can be proposed.
The connectivity of the user equipment is one of the important thing that must be keep by the operator. To maintain this connectivity, operator should be smart to determine the network infrastructure that is low cost, easy, and fast to be implemented. To solve those connectivity problem, in this study will be designed an ad hoc mobile phone network. In an ad hoc network mobile phone which is built...
High Altitude Platform can provide mobile telecommuncication service to on-ground customers. This paper explains the behaviour of LTE network in a situation, where the service is being provided by HAP and eNodeB in a disaster scenario. In the disaster scenario, a set of adjacent eNodeB in the middle of Bandung city has been disabled. A HAP station has been launched to the disaster location to provide...
Soft frequency reuse (SFR) schemes have been proposed to mitigate the inter-cell interferences (ICI) issue for capacity improvements at cell edge. Nonetheless, the allocation of subcarriers in SFR reduces spectral efficiency in specific cell areas, resulting in the decrease of the system throughput. In this paper, we propose to improve the system throughput by dynamically allocating and exchanging...
As the complexity of networks increases significantly, cognitive networking becomes an essential tool to provide efficient management of the valuable resources. In this paper, a Genetic Algorithm (GA) based cognitive LTE downlink scheduler is proposed to allocate radio resources to the users. In the proposed scheme, a network administrator defines high level network policies by setting the operational...
The Long Term Evolution (LTE) network is recognized as the next generation wireless network, which provides high bandwidth and low latency for emerging mobile applications. The issue of power saving is very crucial for the success of service deployment. This paper presents a novel downlink scheduling approach to reduce power consumption while maintaining the receiving quality of video streaming in...
Mobile cellular communications revolutionized in communication system applications. The present mobile cellular communication networks normally often suffer from poor penetration and reception in certain areas, like indoor and apartments in turn decreasing quality of service. The main backbone of Long Term Evolution Advanced (LTE)- mobile network is internet. In order to reduced the traffic and enhance...
LTE, an acronym for Long Term Evolution is a standard developed by the 3rd Generation Partnership Project (3GPP) for high peak data rates with a downlink speed of up to 150 megabits per second (Mbps) and an uplink speed of up to 50 Mbps. LTE is a way for cellular communications to operate at that high data rate. Routing is an important operation performed to route the data packets from the source...
Mobile network traffic has grown exponentially in recent years, and it is expected that this trend will continue in the future. Important driving forces include new affordable smartphones, and the many new connected devices on the market. Also, the rollout of faster HSPA+ and LTE networks is expected to improve the customer experience. Therefore, the efficient management of the expected huge data...
Curitiba is a city in south Brazil with an estimated population of 1.8 million inhabitants [3]. The teledensity in this city is over 1.2 cellular for each person and, four players, actually are working with Long Term Evolution (LTE) in the city. However, the quality of the LTE cell coverage has not yet reached the standard of the Third Generation Partnership Project (3GPP) group. Considering the growing...
This paper evaluates the dynamic behaviour of WiFi and LTE heterogeneous network (HetNet), based on computer simulations. The basic modelling abstraction to describe system operation is described along with the necessary numerical parameters. The focus is on admission control and network reselection in HetNets; two simple but practical algorithms are described and their performance in terms of absolute...
This paper analyzes the uplink spectrum efficiency of an LTE network, taking intercell co-channel interference into account. This study is based on signal-to-interference-plus-noise ratio analysis and appropriate channel models including path loss and shadow fading. This paper also uses the proportional fair scheduling scheme to allocate resource blocks to improve the cell edge performance. The research...
The Long Term Evolution (LTE) network provides high bandwidth, flexible modulation and coding scheme for emerging mobile applications. The issues of power saving and quality of services are very critical for the success of deployment of mobile applications. This paper presents a buffer aware scheduling approach to reduce power consumption while maintaining the receiving quality of video streaming...
In LTE-A networks, relaying is a cost-effective solution to improve the capacity and enhance the coverage. However, in order to fully exploit the benefits of relaying, inter-cell interference coordination (ICIC) and resource sharing among different nodes and links need to be addressed. This paper focuses on Type 1 half-duplex inband relaying. Several strategies related to resource partition and frequency...
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