1 This study was conducted when the authors were with Graduate Institute of Communication Engineering, National Taiwan University, Taipei, Taiwan 10617. Presentation of this paper is made possible by a grant from the National Science Council, Taiwan (NSC-90-2213-E-260-011). ABSTRACT In the past decade, the market of wireless mobile communications has been growing at a rapid pace. A future wirel...

Femtocells are an emerging technology aimed at providing gains to both network operators and end-users. These gains come at a cost of increased interference, specifically the cross network interference between the macrocell and femtocell networks. This interference is one of the main performance limiting factors in allowing an underlaid femtocell network to share the spectrum with the cellular ...

Unmanned Aerial Vehicle (UAV) has been recognized as a promising way to assist future wireless communications due to its high flexibility of deployment and scheduling. In this paper, we focus on temporarily deployed UAVs that provide downlink data offloading in some regions under a macro base station (MBS). Since the manager of the MBS and the operators of the UAVs could be of different interes...

In this paper, we propose smart step closed-loop power control (SSPC) algorithm and base station assignment based on minimizing the transmitter power (BSAMTP) technique in a direct sequence-code division multiple access (DS-CDMA) receiver in the presence of frequency-selective Rayleigh fading. This receiver consists of three stages. In the first stage, with conjugate gradient (CG) adaptive ...

Due to its "xed assignment nature, the well-known TDMA protocol su!ers from poor performance when the o!ered tra$c is bursty. In this paper, a new time division multiple access protocol which is capable of operating e$ciently under bursty tra$c conditions is introduced. According to the proposed protocol, the station which grants permission to transmit at each time slot is selected by means of ...

In WiMAX network, Connection Admission Control (CAC) plays an important role in providing QoS guarantee [47]. The multimedia services are supported in IEEE 802.16 using connection admission control (CAC), packet scheduling, dynamic subcarrier assignment etc. It provides QoS guarantee between Base Station (BS) and Subscriber Station (SS) [21]. The CAC algorithm provides bandwidth guarantee and a...

In this paper, we consider a beyond-5G scenario, where two types of users, denoted as scheduled and uncoordinated nodes, coexist on the same set of radio resources for sending data to a base station. Scheduled nodes rely solely on a centralized scheduler within the base station for the assignment of resources, while uncoordinated nodes use an unslotted Carrier Sense Multiple Access (CSMA) proto...