Introducing mobile small cells to next generation cellular networks is nowadays a pervasive and cost-effective way fulfill the ever-increasing broadband traffic. Being agile resilient, unmanned aerial vehicles (UAVs) mounting are deemed emerging platforms for provision of wireless services. As residual battery capacity available UAVs determines lifetime an airborne network, it essential account energy expenditure on various flying actions in flight plan. The focus this paper therefore...

With the rapid growth of mobile broadband traffic, adopting small cell is a promising trend for operators to improve network capacity with low cost. However, static cells cannot be flexibly placed fulfill time/space-varying traffic. The might stay in idle or under-utilized mode during some time periods, which wastes resources. Therefore, this paper utilizes concept and studies deployment problem cells. objective maximize service provided by all users. If finite number can serve more users...

With the increasing demand for ultra-low latency services in 5G cellular networks, fog with edge computing is one of promising solutions which migrate from cloud to network. Rather than relying on distant or additional servers, we propose Fog-Radio Access Network (F-RAN), leverages current infrastructures radio access network, such as small cells and macro base stations, pursue by joint powerful multiple F-RAN nodes near-range communications at edge. The optimization problem firstly...

Coordinated multipoint joint transmission (JT) is a vital technique of the fifth-generation (5G) networks to increase throughput but causes significant burden on network backhaul because same user data must distribute multiple base stations, called JT cluster. Thus, many studies have explored how reduce traffic using caching at stations. Millimeter wave (mmWave) mesh promising architecture for small cells exchange cache over 5G networks. However, this paper observes that inappropriate...

Narrowband Internet of Things (NB-IoT) offers three coverage enhancement (CE) levels to serve massive machines in a large area. For each CE level, the base station configures control periods determine number allocatable radio resources for signal and data transmissions. Both uplink (UL) downlink (DL) communications use same periods, but UL DL need different period lengths. In general, suitable is longer than that DL. Then, assigns machine. To this end, we study how choose length allot...

Software-defined networking (SDN) paradigm and high-speed wireless technologies have been widely adopted by industries to improve the performance of data center networks. In SDN, a switch commonly uses ternary content addressable memory (TCAM) store rules for fast flow table lookup. However, due limited TCAM entries, rule replacement will occur frequently when traffic load in centers is heavy. This issue be more serious characteristics are diverse. Although transmissions can benefit reducing...

One viable and low-cost method of accommodating the explosive growth mobile broadband traffic is to introduce small cells for next-generation cellular networks. However, static cannot be flexibly placed meet demand time/space-varying traffic, idle or under-utilized would result in a waste resources system performance degradation. This study adopts small-cell concept seeks optimize deployment maximize service time. Service time maximization exhibits an interesting tradeoff between user...

Given the explosive growth of mobile subscribers, network operators have to densely deploy base stations serve exponentially increasing access demands. Nevertheless, recent researches pointed out that station operation has been identified as a significant portion total system energy consumption and 90% traffic is carried by only 40% even under peak demand. Therefore, switching off underutilized for saving power an important issue with awareness environmental responsibility economical...

Joint transmission (JT), an attractive coordinated multipoint (CoMP) downlink technique, is used to increase cell-edge user throughput, but has distribute the same data multiple base stations termed a JT cluster, thus leading huge burden on backhaul bandwidth. Therefore, recent studies considered caching at reduce bandwidth consumption. However, we observe that even with caches stations, clustering decisions, without considering caching, cannot efficiently use in and will result unnecessary...

With the advance of wireless technologies and mobile devices, number devices in cellular system will explosively grow. According to this trend, a base station face heavy traffic loading even cannot provide services for large amount devices. To deal with issue, device-to-device (D2D) technology is promising solution increase spectrum efficiency by reusing radio resource blocks. In paper, we study allocation problem objective maximizing capacity over ultra-dense 5G systems consider scenario...

The software-defined networking (SDN) architecture has been widely deployed in data centers to support diverse cloud services. In order provide fast access for flow table lookup, SDN switches usually use ternary content addressable memory (TCAM) store their routing rules given by a controller. However, the number of TCAM entries is relatively small due its high cost and energy consumption. As traffic significantly increases, rule replacement will occur very frequently switches. result,...

One of the significant properties narrowband Internet Things (NB-IoT) devices is supporting a long battery life. In NB-IoT, have different search-space periods based on channel qualities. However, because subframe 180 kHz basic unit in downlink, base station can generally only simultaneously schedule with same period and allocate radio resources at start period. If scheduling does not consider periods, will miss some or sacrifice devices. Massive attempt multiple for blind decoding (BD),...

With the advance of wireless technologies, rapid mobile data traffic growth will lead to severe network resource consumption and exceptionally long latency access services, especially for cloud-based applications. To tackle these issues, Fog Radio Access Network (F-RAN) is recently emerged next generation cellular networks. F-RAN considered as an extension cloud computing paradigm edge a highly virtualized platform that provides computing, storage, services devices. However, how...

The third-generation partnership project (3GPP) has defined a new radio access network protocol, called the narrowband Internet of Things (NB-IoT). To accommodate devices with diverse signal qualities, base station can flexibly adjust lengths two important resources, physical downlink control channel (NPDCCH) and downlink-shared (NPDSCH), to serve under one coverage enhancement level. interval between consecutive NPDCCH is an period. Given period, should allocate resources for receive data....

Narrowband Internet of Things (NB-IoT) is a new narrowband radio technology in fifth-generation (5G) networks. In NB-IoT cellular networks, to provide low-power wide-area coverage, there are several different resource allocation units that can be allocated by base station devices for uplink transmissions. Traditional algorithms without considering the multiple not appropriate and we observe only adopting same unit each device will result wastage. Therefore, this paper investigates problem...

With the explosive growth of cloud-based services, large-scale data centers are widely built for housing critical computing resources to gain significant economic benefits. In centers, cloud services generally accomplished by multicast-based group communications. Recently, many well-known industries, such as Microsoft, Google, and IBM, adopt high-speed wireless technologies augment network capacity in centers. However, those multicast delivery schemes traditional wired do not consider unique...

Narrowband Internet of Things (NB-IoT) is a critical technology for fifth-generation (5G) and next sixth-generation (6G) networks to meet the high density latency requirements massive devices. Before data transmission or reception in NB-IoT networks, device needs monitor search space narrowband physical downlink control channel (NPDCCH). When NPDCCH resource exhausted, neither uplink shared (NPUSCH) nor narrowed (NPDSCH) possible, even if two channels still have available radio resources. To...

Layer-encoded multimedia multicasting (LMM) has emerged in recent years to support heterogeneous subscriber stations with diverse computing and networking capabilities. With the advance of broadband wireless access technologies, relay networks (WRNs) are expected provide significant improvement on throughput extension coverage for next-generation systems. In this paper, we study a radio resource allocation problem consideration interferences LMM over WRNs. The is formally formulated,...

One viable and cost-effective method to fulfill the ever-increasing mobile broadband traffic achieve coverage capacity improvement is employment of small cells in next generation cellular networks. Being agile resilient, aerial (ASCs), which are mounted on unmanned vehicles (UAVs), deemed promising platforms for provision wireless services. Since lifetime an airborne network highly depends residual battery available each ASC, it essential account energy expenditure various flying actions a...

In narrowband Internet of Things (NB-IoT), a link adaptation technique can be performed, considering multiple resource unit types, repetition numbers, and modulation-coding schemes, to enhance transmission reliability. Then, base station should allocate downlink uplink resources for each device using the decision transmit data in NB-IoT frame structures. However, because physical random access channels (NPRACHs) will occupy partial radio resource, assigned without NPRACHs cause severe...

Recently, the third generation partnership project (3GPP) has specified a new radio access network protocol, called narrowband IoT (NB-IoT) which is low-power wide-area network. In NB-IoT systems, number of connected devices will be explosively increased and how to efficiently use resources systems achieve massive connections an important issue. However, since downlink strategy designed for needs performed in one dimension (i.e., time domain), we observe that inappropriate scheduling...

Before each user equipment (UE) can send data using the narrowband physical uplink shared channel (NPUSCH), UE should periodically monitor a search space in downlink control (NPDCCH) to decode indicator (DCI) over Internet of Things (NB-IoT). This monitoring period, called NPDCCH period NB-IoT, be flexibly adjusted for UEs with different qualities. However, because low-cost NB-IoT operate half-duplex mode, they cannot spaces NPDCCHs and transmit NPUSCH simultaneously. Thus, as we observed,...

With the rapid growth of mobile data traffic, operators are expected to densely deploy base stations meet user demands. Recent researches have indicated that deployed lead significant increase operational expenses due electricity bills maintain their operation, and thus profit is greatly decreased. Different from past works in dynamically switching on/off for energy saving, we propose consider benefits users service fee discounts as a joint optimization process cutting down consumption...

The video streaming applications are full of potentials in the IP dual stack network that supports IPv4 and IPv6 protocols simultaneously. However, significances packets belonged to various sequences different. An equal error protection all will degrade quality significantly. This paper proposes an Adaptive Significance Determination Mechanism Temporal Spatial domains (ASDM-TS) for H.264 videos over with DiffServ model. ASDM-TS determines packet significance simultaneously temporal spatial...