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Gotowe bibliografie tematyczne / Cache-aided wireless transmission system

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Gotowa bibliografia na temat „Cache-aided wireless transmission system”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Cache-aided wireless transmission system"

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Lan, Tingting, Danyang Qin i Guanyu Sun. "Joint Optimization on Trajectory, Cache Placement, and Transmission Power for Minimum Mission Time in UAV-Aided Wireless Networks". ISPRS International Journal of Geo-Information 10, nr 7 (23.06.2021): 426. http://dx.doi.org/10.3390/ijgi10070426.

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In recent years, due to the strong mobility, easy deployment, and low cost of unmanned aerial vehicles (UAV), great interest has arisen in utilizing UAVs to assist in wireless communication, especially for on-demand deployment in emergency situations and temporary events. However, UAVs can only provide users with data transmission services through wireless backhaul links established with a ground base station, and the limited capacity of the wireless backhaul link would limit the transmission speed of UAVs. Therefore, this paper designed a UAV-assisted wireless communication system that used cache technology and realized the transmission of multi-user data by using the mobility of UAVs and wireless cache technology. Considering the limited storage space and energy of UAVs, the joint optimization problem of the UAV’s trajectory, cache placement, and transmission power was established to minimize the mission time of the UAV. Since this problem was a non-convex problem, it was decomposed into three sub-problems: trajectory optimization, cache placement optimization, and power allocation optimization. An iterative algorithm based on the successive convex approximation and alternate optimization techniques was proposed to solve these three optimization problems. Finally, in the power allocation optimization, the proposed algorithm was improved by changing the optimization objective function. Numerical results showed that the algorithm had good performance and could effectively reduce the task completion time of the UAV.

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Wei, Menghan, Youjia Chen i Ming Ding. "On the Performance of UAV-Aided Content Caching in Small-Cell Networks with Joint Transmission". Electronics 10, nr 9 (28.04.2021): 1040. http://dx.doi.org/10.3390/electronics10091040.

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Unmanned aerial vehicles (UAVs), featured by the high-mobility and high-quality propagation environment, have shown great potential in wireless communication applications. In this paper, a novel UAV-aided small-cell content caching network is proposed and analyzed, where joint transmission (JT) is considered in the dense small-cell networks and mobile UAVs are employed to shorten the serving distance. The system performance is evaluated in terms of the average cache hit probability and the ergodic transmission rate. From the analytical results, we find that (i) the proposed UAV-aided small-cell network shows superior caching performance and, even with a small density of UAVs the system’s cache hit probability, can be improved significantly; (ii) the content’s optimal caching probability to maximize the cache hit probability is proportional to the (K+1)-th root of its request probability, where K is the number of small-cell base stations that serve each user by JT; (iii) caching the most popular content in UAVs may lead to a low transmission rate due to the limited resource offered by the low-density UAVs. Simulation results are presented to validate the theoretical results and the performance gain achieved by the optimal caching strategy.

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Le, Anh-Tu, Nhan Duc Nguyen, Dinh-Thuan Do i Munyaradzi Munochiveyi. "Enabling Device-to-Device Transmission for NOMA-Aided Systems". Wireless Communications and Mobile Computing 2021 (16.11.2021): 1–10. http://dx.doi.org/10.1155/2021/4342983.

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To utilize the close transmission, we assume that the device-to-device (D2D) link is activated to improve the performance of the far user. We consider two groups of users in the nonorthogonal multiple access- (NOMA)- aided wireless system. These features are necessary for massive connectivity in future wireless systems. The system performance also shows suitable performance at far distance users. To evaluate the performance in detail, we derive novel closed form expressions of outage probability. In practical situations impaired by channel uncertainty, it is necessary to evaluate the impact of channel error levels on outage probability. Our numerical results indicated that the transmit power at the base station and channel error level are the main impacts on system performance. Despite these impacts, our obtained numerical results demonstrated that the proposed scheme can still increase energy efficiency and achieve significant outage performance via many practical challenges.

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Ren, Yuan, Yixuan Tan, Meruyert Makhanbet i Xuewei Zhang. "Improving Physical Layer Security of Cooperative NOMA System with Wireless-Powered Full-Duplex Relaying". Information 12, nr 7 (10.07.2021): 279. http://dx.doi.org/10.3390/info12070279.

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Non-orthogonal multiple access (NOMA) and wireless energy harvesting are two promising technologies for improving spectral efficiency and energy efficiency, respectively. In this paper, we study the physical layer security of a wireless-powered full-duplex (FD) relay-aided cooperative NOMA system. In particular, the source is wiretapped by an eavesdropper, and the FD relay assists the transmission from the source to a near user and a far user with self-energy recycling. To enhance the security performance of the system, we propose an artificial noise (AN)-aided cooperative transmission scheme, in which the relay emits a jamming signal to confuse the eavesdropper while receiving the signal from the source. For the proposed scheme, the ergodic secrecy sum rate (ESSR) is derived to characterize the secrecy performance and a lower bound of ESSR is obtained. Finally, numerical results verify the accuracy of the theoretical analysis of the proposed AN-aided secure transmission scheme. The superiority of the proposed scheme is also demonstrated since this scheme can achieve better secrecy performance, compared to the conventional cooperative NOMA scheme.

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Nguyen, Nhan Duc, Anh-Tu Le, Munyaradzi Munochiveyi, Fatemeh Afghah i Evangelos Pallis. "Intelligent Reflecting Surface Aided Wireless Systems with Imperfect Hardware". Electronics 11, nr 6 (14.03.2022): 900. http://dx.doi.org/10.3390/electronics11060900.

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In this article, we investigate the design of reconfigurable intelligent surface (RIS)-aided transmission as a smart method to reflect signals received from access points to users and, hence, improving users’ performance. To implement smart Internet of Things (IoT) networks, massive connectivity and low-cost deployment are essential in designing such systems. In particular, we consider two practical scenarios (dual-hop and single-hop transmissions). These scenarios highlight the potential of RIS in enhancing the system’s outage probability performance. Furthermore, to characterize channel conditions in practice, we pay particular attention to two-channel distributions that are non-central chi-square (NCCS) distributions that approximate the channel distribution of the RIS-aided wireless system and the squared KG distribution. In addition, the RIS-aided system may face imperfect hardware-related issues in practice. Therefore, we need to consider the degraded performance of practical RIS-aided systems by considering the detrimental impact of in-phase and quadrature-phase imbalance (IQI). To characterize the main system performance metric, we provide closed-form formulas of outage probability and ergodic capacity. We then evaluate system performance under the impacts of signal-to-noise ratio (SNR), the number of meta-surfaces, and channel parameters. All closed-form outage expressions are validated via Monte Carlo simulations. Simulation results indicate that the considered RIS scheme at dual-hop and single hop under the impact of IQI and RIS hardware impairment achieves significant improvements in terms of outage probability at high SNR and high meta-surface number N. Additionally, the simulation results demonstrate that the impact of IQI on the proposed system is limited. It is worth noting that, in terms of ergodic capacity, ergodic capacity faces an upper limit. Despite this limitation, the proposed system can still work well once some parameters are controlled well, such as the transmit SNR, levels of IQI, and the number of RIS components.

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Ma, Cong, i Wonjun Chung. "Visual Communication Design Based on Collaborative Wireless Communication Video Transmission". Journal of Sensors 2022 (15.01.2022): 1–11. http://dx.doi.org/10.1155/2022/5348222.

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With the development of wireless communication technology, video and multimedia have become an integral part of visual communication design. Designers want higher interactivity, diversity, humanization, and plurality of attributes in the process of visual communication. This makes the process of visual communication have high requirements for the quality and real-time data transmission. To address the problem of transmitting HD video in a heterogeneous wireless network with multiple concurrent streams to improve the transmission rate and thus enhance the user experience, with the optimization goal of minimizing the system transmission delay and the delay difference between paths, the video sender and receiver are jointly considered, and the video transmission rate and the cache size at the receiver are adaptively adjusted to improve the user experience, and a cooperative wireless communication video transmission based on the control model for video transmission based on cooperative wireless communication is established, and video streams with self-similarity and long correlation are studied based on Pareto distribution and P / P / l queuing theory, based on which an adaptive streaming decision method for video streams in heterogeneous wireless networks is proposed. Simulation results show that the proposed multistream concurrent adaptive transmission control method for heterogeneous networks is superior in terms of delay and packet loss rate compared with the general load balancing streaming decision method, in terms of transmission efficiency and accuracy.

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Chen, Zikang, Ming Zeng i Zesong Fei. "Joint Unmanned Aerial Vehicle Location and Beamforming and Caching Optimization for Cache-Enabled Multi-Unmanned-Aerial-Vehicle Networks". Electronics 12, nr 16 (14.08.2023): 3438. http://dx.doi.org/10.3390/electronics12163438.

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Due to the advantages such as high flexibility, low cost and easy implementation offered by unmanned aerial vehicles (UAVs), a UAV-assisted network is regard as an appealing solution to a seamless coverage, high disaster-tolerant and on-demand wireless system. In this paper, we focus on the downlink transmission in a cache-enabled UAV-assisted wireless communication network, where UAVs cache popular content from a macro base station in advance and cooperatively transfer the content to users. We aim to minimize the average transmission latency of the system and to formulate an optimization problem that jointly optimizes the UAV location, beamforming and caching strategy. However, the formulated problem is very challenging because of its non-convexity and the highly coupled optimization variables. To solve this resulting problem efficiently, we decompose it into two subproblems, namely UAV location and beamforming optimization, and UAV caching strategy optimization. The first subproblem is an NP-hard joint optimization problem, while the second one is a linear programing problem. By adopting the first-order Taylor expansion, we propose a convex optimization algorithm based on the difference-of-convex (DC) method. Specifically, we bring out a method to apply linear approximation in the DC-based algorithm, which is particularly suitable to the problems involving complicated summations. The numerical results demonstrate that the proposed DC-based iterative optimization algorithm can efficiently reduce the average transmission latency of the system.

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Chen, Shupei, Zhigang Chen, Jia Wu i Kanghuai Liu. "An Adaptive Delay-Tolerant Routing Algorithm for Data Transmission in Opportunistic Social Networks". Electronics 9, nr 11 (13.11.2020): 1915. http://dx.doi.org/10.3390/electronics9111915.

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In opportunistic networks, the requirement of QoS (quality of service) poses several major challenges to wireless mobile devices with limited cache and energy. This implies that energy and cache space are two significant cornerstones for the structure of a routing algorithm. However, most routing algorithms tackle the issue of limited network resources from the perspective of a deterministic approach, which lacks an adaptive data transmission mechanism. Meanwhile, these methods show a relatively low scalability because they are probably built up based on some special scenarios rather than general ones. To alleviate the problems, this paper proposes an adaptive delay-tolerant routing algorithm (DTCM) utilizing curve-trapezoid Mamdani fuzzy inference system (CMFI) for opportunistic social networks. DTCM evaluates both the remaining energy level and the remaining cache level of relay nodes (two-factor) in opportunistic networks and makes reasonable decisions on data transmission through CMFI. Different from the traditional fuzzy inference system, CMFI determines three levels of membership functions through the trichotomy law and evaluates the fuzzy mapping from two-factor fuzzy input to data transmission by curve-trapezoid membership functions. Our experimental results show that within the error interval of 0.05~0.1, DTCM improves delivery ratio by about 20% and decreases end-to-end delay by approximate 25% as compared with Epidemic, and the network overhead from DTCM is in the middle horizon.

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, Senthilkumar.S, Devarajan R. "Wireless Aided Protection for 110 KV Transmission Line to Improve the System Stability". International Journal of Innovative Research in Computer and Communication Engineering 4, nr 7 (30.07.2016): 13041–48. http://dx.doi.org/10.15680/ijircce.2016.0407006.

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Moon, Sang-Rok, Seungjun Han, Sanghwa Yoo, Heuk Park, Won-Kyoung Lee, Joon Ki Lee, Jongwoo Park, Kyoungsik Yu, Seung-Hyun Cho i Joonyoung Kim. "Demonstration of photonics-aided terahertz wireless transmission system with using silicon photonics circuit". Optics Express 28, nr 16 (22.07.2020): 23397. http://dx.doi.org/10.1364/oe.398460.

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Rozprawy doktorskie na temat "Cache-aided wireless transmission system"

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Das, Sibasish. "Analysis and design of pilot-aided multicarrier systems over doubly selective channels with a local subcarrier processing constraint". Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1199305333.

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Rahul, R. "Low delay file transmissions over power constrained quasi-static fading channels". Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5896.

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The ubiquitous deployment of battery-operated wireless devices has resulted in the need for efficient low latency power allocation schemes. A common phenomenon in wireless transmission systems is congestion, where the transmitter backlog grows due to restrictions in channel usage on a resource-constrained shared access medium. In this research work, we aim to achieve low communication delay of wireless downlink file transmissions operating on power-constrained quasi-static fading channels, using state-dependent transmission rate control and admission of file transmission requests. We employ a Markov queueing model to formulate the low delay objective for exponentially distributed file sizes as a constrained average queue length minimization problem. The corresponding primal problem is known to be expressible as a linear program in occupation measures, and therefore strong duality holds. In our work, we show the primal feasibility of the dual optimal policy w.r.t. the average throughput and power constraints, which is proved under the assumption the optimal average power and throughput are continuous with respect to the Lagrange dual variables at the optimal point. The dual problem is simplified to an iterative optimization using Dinkelbach’s fractional programming method and solved using gradient analysis techniques to analytically derive the ON-OFF threshold characteristics of the admission policy and the recursive structure of the transmission rate policy. We first apply our solution method to a wireless transmission system using the M/M/1 queueing model. Our objective is to minimize the average queue length subject to an upper bound on average transmission power and a lower bound on average admission rate. This constrained average queue length minimization problem is solved using Lagrange dual method. We substitute the individual stationary probabilities in the Lagrange dual function using the product form distribution expressed in terms of the stationary probability of the maximum queue length. The resulting objective function then corresponds to a fractional minimization problem which is solved using Dinkelbach’s method. We analytically derive the ON-OFF threshold characteristic of the optimal admission rates and the recursive structure of the optimal transmission rates. We illustrate the results of our algorithm for different values of throughput and power requirements. We also demonstrate the efficiency of optimal state-dependent rate control for exponentially distributed file sizes compared to benchmark state-independent transmission schemes. We next apply the solution techniques to an energy harvesting wireless transmission system, extending the M/M/1 queueing model. The model uses energy stored in a battery as well as energy packets available from an auxiliary power supply for file transmission. We use the product-form stationary distribution to establish a correspondence between the energy harvesting system and the M/M/1 queueing system. Using the solution approach using Dinkelbach’s method, we derive similar characteristics for the optimal admission and transmission rates. We finally extend the analysis to model a cache-aided wireless transmission system operating under the assumption the cache-hit probability is uniform for all files and queue length states. The system is modeled as a quasi-one-dimensional Markov chain. The stationary probabilities in the Lagrange dual function are expressed in terms of the stationary probability of the empty buffer state using the product of matrices. The solution methods and insights developed from the previous models simplify the analysis of this problem, and we analytically characterize the structure of the optimal admission and transmission rates. The applicability of our solution methodology to these three models of transmission systems illustrates its simplicity and versatility.

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Saleem, Ayesha Bint. "Performance evaluation of the cache and forward link layer protocol in multihop wireless subnetworks". 2008. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17562.

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Książki na temat "Cache-aided wireless transmission system"

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5G Wireless Technologies. Institution of Engineering & Technology, 2017.

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Alexiou, Angeliki. 5G Wireless Technologies. Institution of Engineering & Technology, 2017.

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Części książek na temat "Cache-aided wireless transmission system"

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Fernández-Caramés, Tiago M., Adriana Dapena, José A. García-Naya i Miguel González-López. "A Decision-Aided Strategy for Enhancing Transmissions in Wireless OSTBC-Based Systems". W Advances in Computational Intelligence, 500–507. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21498-1_63.

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Nomikos, Nikolaos, i Demosthenes Vouyioukas. "Spectral Efficient Opportunistic Relay Selection Policies for Next Generation Mobile Systems". W Advances in Wireless Technologies and Telecommunication, 85–111. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8732-5.ch005.

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This book chapter presents various relay selection policies based on spectral efficient techniques for the next generation mobile systems. Successive opportunistic relaying (SOR) that leverages the half-duplex constraint of conventional relays through concurrent transmissions is described, while proposing techniques to reduce the effect of inter-relay interference (IRI). An extension of SOR is defined for the case of out-of-band relaying, when additional spectrum bands are available and in networks with buffer-aided relays. Moreover, the use of full-duplex (FD) relays is outlined, in view of the effect of loop-interference (LI) from the relay's output to its input and, also, the power reduction is presented. As networks with multiple relays suffer from increased coordination overhead, a reduced Channel State Information (CSI) policy is proposed. For every policy, performance evaluation is provided in terms of outage probability, average throughput, power reduction and switching rate. Finally, open problems in spectral-efficient opportunistic relay selection policies are discussed.

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Streszczenia konferencji na temat "Cache-aided wireless transmission system"

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Wei, Yuxin, Li Guo, Chao Dong i Xidong Mu. "Secure Transmission for Intelligent Reflecting Surface-Aided Communication System". W 2021 IEEE Wireless Communications and Networking Conference Workshops (WCNCW). IEEE, 2021. http://dx.doi.org/10.1109/wcncw49093.2021.9420018.

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Takabayashi, Nobuyuki, Takero Toyonaga, Kento Suzuki, Katsumi Kawai, Yuki Tanaka i Naoki Shinohara. "Initial Developments of Image-Recognition-Aided Microwave Power Transmission System for Smartphone Charging". W 2022 Wireless Power Week (WPW). IEEE, 2022. http://dx.doi.org/10.1109/wpw54272.2022.9854019.

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Wong, Seng Fat, W. I. Ho, Zhixin Yang i C. T. Kwok. "RFID-aided manufacturing training system and localization". W 2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications (IMWS 2011). IEEE, 2011. http://dx.doi.org/10.1109/imws.2011.6114980.

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Wang, Kaihui, Xinying Li, Miao Kong, Pengqi Gou, Wen Zhou i Jianjun Yu. "Probabilistically Shaped 16QAM Signal Transmission in a Photonics-aided Wireless Terahertz-Wave System". W Optical Fiber Communication Conference. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/ofc.2018.m4j.7.

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Tong, Weidong, Jiao Zhang, Min Zhu, Weiliang Xu, Yingxin Wei, Shuang Gao, Qinru Li i in. "Photonics-aided Multi-subcarrier Phase-insensitive/Sensitive PAM-4 Multiplexing Wireless Transmission System at 100 GHz". W 2022 Asia Communications and Photonics Conference (ACP). IEEE, 2022. http://dx.doi.org/10.1109/acp55869.2022.10089068.

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Zhou, Wen, Xiongwei Yang, Weiping Li, Feng Wang, Bowen Zhu, Huajiong Lin, Junting Shi i in. "Demonstration of PDM-2048QAM W-Band Signal Delivery over 4.6 km Wireless transmission Employing One bit DSM". W Optical Fiber Communication Conference. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ofc.2023.w2b.25.

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In a photonics-aided mm-wave communication system, we successfully achieved W-band long-distance transmission of PDM-1024QAM/2048QAM signals over 4.6 km by using a PTFE lenses and Delta-Sigma Modulator (DSM).

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Li, Qinru, Jiao Zhang, Min Zhu, Qingyi Zhou, Weiliang Xu, Yucong Zou, Jikuan Wang i in. "Flexible-rate Photonic-aided Wireless Transmission System at 101-GHz Based on Multi-Band CAP-PAM Modulation". W Optoelectronics and Communications Conference. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/oecc.2021.m4b.7.

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Bharade, Ashwini, i Jitendra Otwani. "Interference Aided Wireless Energy Harvesting in Cache-assisted Cognitive Relay System". W 2018 IEEE 13th International Conference on Industrial and Information Systems (ICIIS). IEEE, 2018. http://dx.doi.org/10.1109/iciinfs.2018.8721373.

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Zhu, Zhengyu, Ning Wang, Zheng Chu, Zhongyong Wang i Inkyu Lee. "AN-aided secure transmission in multi-user MIMO SWIPT systems". W 2018 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, 2018. http://dx.doi.org/10.1109/wcnc.2018.8377223.

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Junyi Wang, Xin Jiang, Yi Weng, Xuan He i Z. Pan. "Non-data-aided chromatic dispersion estimation for Nyquist spectrally shaped fiber transmission systems". W 2014 23rd Wireless and Optical Communication Conference (WOCC). IEEE, 2014. http://dx.doi.org/10.1109/wocc.2014.6839929.

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