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The paper investigates the principles of functioning of wireless communication networks of the next generation with M2M traffic. In the early stages, the new technology will be implemented on the basis of 4G (LTE) infrastructure, complemented by innovative radio access developments and new resource management techniques for the IoT services implementation. We present the analysis of the requirements...
Coordinated Multi-Point (CoMP) is considered as one of the most important techniques in 3GPP LTE/LTE-A. In CoMP, several base stations can be grouped together to form the cooperating set, where the cooperating set is used to improve the system throughput as well as the throughput of cell edge users. Most of the studies discussed how to relieve the overload condition or maximize the system throughput...
We consider the resource allocation with aggregation of multiple bands including unlicensed band for heterogeneous traffic. While the mobile data traffic including high volume of video traffic is expected to increase significantly, an efficient management of radio resources from multiple bands is required to guarantee the quality of service (QoS) of different traffic types. In this context, we formulate...
5G New Radio (NR) is envisioned to support three broad categories of services: evolved mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), and massive machine-type communications (mMTC). The URLLC services refer to future applications that require secure data communications from one end to another with ultra-high reliability and deadline-based low latency requirements....
4G/LTE (Long Term Evolution) is the state of the art wireless mobile broadband technology. It makes use of the OFDM technology to offer high speed and provides the system resources both in time and frequency domain. A scheduling algorithm running on the base station holds the allocation of these resources. In this paper, the performance of existing downlink scheduling algorithms has been investigated...
This paper proposes subcarrier allocation to users in multi user OFDMA networks to fulfill the rate requirements and is considered as non linear optimization problem. In this proposed solution, subcarriers are allocated based on gain and data rate requirement of individual user, our simulation results have shown that, subcarrier allocation based on rate requirement and gain could lead to data rate...
The paper a scheme is recommended for incoming calls to mobile network which allocates the real time (voice, multimedia, video etc.) and non real time (data) calls differently. The calls are differentiated by their quality of service (QoS) requirements. It is used in the downlink of multi-rate MC-DS-CDMA. The real-non real (R-NR) scheme assigns on arrival of new call assigns a vacant code which introduces...
In this paper, a win-win cooperative strategy is designed for two pairs of users, i.e., a primary user pair and a secondary user pair, competing resources in an orthogonal frequency division multiplexing (OFDM) network. The primary users aim to achieve given target rates with the help of a relay to overcome bad channel conditions, where one secondary user is selected as the relay to improve the overall...
We consider the problem of designing transmit beamformers for a multi-carrier joint processing coordinated multi-point (CoMP) transmission with finite backhaul capacity. We assume a Cloud Radio access network (CRAN) wherein the beamformers are designed centrally, quantized and sent via the backhaul to the respective base stations (BSs). The beamformer design becomes a nonconvex combinatorial problem...
In this paper we address the challenge of multiuser scheduling in the downlink of Long Term Evolution (LTE) by bringing innovation in the concept of proportional fairness. We plug geometric average into the selection criterion of User Equipments (UEs) as opposed to widely used arithmetic average. We prove that the geometric average throughput converges to the solution of an ordinary differential equation,...
In this paper, the femtocell resource allocation in the Orthogonal Frequency Division Multiple Access (OFDMA) integrated cognitive radio (CR) networks has been demonstrated to optimize the network performance, while reducing the outage users at cell edges. The sub-band sharing flexibility not only improves the spectral efficiency of the dynamic FFR scheme against conventional approach but also it...
The inclusion of a previously non-existent traffic class required by the Smart Grid poses many difficulties on OFDMA based wireless communication systems. In this paper, we develop a resource allocation algorithm based on the ecological research Lotka-Volterra equations. Each class of traffic is modelled as a species and they compete over the telecommunications resources. Constraints were then placed...
Spectrum scarcity is one of the most discussed limiting factors in wireless communication systems. To solve this issue heterogeneous network (HetNets) is introduced. It is a promising development to fulfil the requirement of Long Term Evolution (LTE) and Long Term Evolution Advanced (LTE-A). With the introduction of HetNets comes femtocell which arises the problem of Inter Cell Interference (ICI)...
Long Term Evolution Advanced (LTE-A) supports a wide range of applications that continuously demand for more resources in order to satisfy the customers' needs. Starting from release 10, Carrier Aggregation (CA) technology has been embedded in the standard to increase the available resources and thus higher performance is offered to users. The Bidirectional real-time applications where large requirements...
In this paper, we investigate the joint resource allocation policy for an orthogonal frequency division multiplexing (OFDM)-based cooperative cognitive radio network with statistical delay quality of service (QoS) guarantees. In the CR network, the spectrum leasing scheme operates in a situation where the primary users (PUs) lease part of its licensed spectrum to the secondary users (SUs) in exchange...
User mobility has become a key attribute in the design of optimal resource allocation policies for future wireless networks. This has become increasingly apparent in cognitive radio (CR) systems where the licensed, primary users (PU) of the network must be protected from harmful interference by the network's opportunistic, secondary users (SU): here, unpredictability due to mobility requires the implementation...
In this paper, we presented a fairness-aware scheduling scheme in OFDM-based cognitive radio networks. Our objective is to maximize the systems energy efficiency while maintain the fairness among secondary users. In addition, many factors will be considered such as the channel quality, the interferences taken to the primary system and the total transmission power of the cognitive radio system. The...
One of the key requirements for fifth-generation (5G) cellular networks is their ability to handle densely connected devices with different quality of service (QoS) requirements. In this article, we present multi-service oriented multiple access (MOMA), an integrated access scheme for massive connections with diverse QoS profiles and/or traffic patterns originating from both handheld devices and machine-to-machine...
Heterogeneous networks (HetNets) adopting fractional frequency reuse (FFR) improves cell coverage, network capacity, efficiency, assures higher data rates, and better quality of service (QoS) for next generation wireless networks. However they fail to handle dynamic load variation. So we attempt biasing cell association (BCA) to offload user from macrocell to small cell base stations (SCBs) to overcome...
Future wireless systems must be designed to meet high data rates and a variety of services such as voice, video, etc. which consume more energy. Therefore, designing energy-efficient systems in recent years has become an inevitable trend. In this paper energy efficient resource allocation in orthogonal frequency division multiple access (OFDMA) systems is discussed. After formulating the resource...
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