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Expected Q-learning for Self-Organizing Resource Allocation in LTE-U with Downlink-Uplink Decoupling

Expected Q-learning for Self-Organizing Resource Allocation ...

引用

European Wireless 2017;23th European Wireless Conference

作者： Ye Hu Richard MacKenzie Mo Hao Beijing Laboratory of Advanced Information Network Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications BT TSO Tsinghua SEM Advanced ICT Lab

ISBN: (纸本)9781509038442

Exponentially growing demand on mobile data facilitates the need to increase spectrum efficiency and also to gain access to additional spectrum bands. LTE-U provides a way for LTE service to be provided, in some regulatory areas, using a combination of licensed and unlicensed spectrum. In this paper, we consider the resource allocation problem in LTE-U networks with downlink-uplink decoupling (DUDe) technique. Here, the spectrum allocation problem is formulated as a game theoretic model which incorporates user association, spectrum allocation, and load balancing. We propose a decentralized expected Q-learning algorithm to solve this game. Using the proposed algorithm, the base stations can autonomously choose their optimal spectrum allocation schemes based on only limited information from the networks. It is shown that the proposed algorithm converges to a stationary mixed-strategy distribution which constitutes a mixed strategy Nash equilibrium for the studied game. Simulation results show the proposed Q-learning algorithm yields up to 12.7% and 51.1% improvement in terms of total rate, compared to traditional Q-learning and nearest neighbor algorithms, respectively. Furthermore, it is shown that the proposed Q-learning algorithm always converges to a mixed Nash equilibrium, and need 19% less time to coverage compared to traditional Q-learning.

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks Signal processing algorithms

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Zone Coordinates: A New Coordinate system

Zone Coordinates: A New Coordinate System

引用

2017 17th IEEE International Conference on Communication Technology (ICCT 2017)

作者： Zehua Gao Mingjing Zhu Yuxi Tan School of Information and Communication Engineering Beijing Laboratory of Advanced Information NetworksBeijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Coordinates systems include rectangular coordinate systems, cylindrical coordinate systems, and spherical coordinate systems, among others. In three-dimensional rectangular coordinate systems, "x = 2" defines a plane, "x = 2,y = 3" defines a line, and "x = 2, y = 3, z = 1" defines a ***, traditional coordinates systems are represented by the combination of point, line, and plane. In the real world,every object or field occupies a certain volume, even atoms or protons. We present a new coordinate system, called the zone coordinate system, that gives the position of an entire object or field. The zone coordinate system is more in line with reality. It can be applied in every field that requires a location-based application.

关键词： rectangular coordinate point-line coordinates zone coordinate

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A Dynamic Multiuser Detection Scheme for Uplink SCMA system

A Dynamic Multiuser Detection Scheme for Uplink SCMA System

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2017 17th IEEE International Conference on Communication Technology (ICCT 2017)

作者： Yuxi Tan Zehua Gao Siyan Guo Feng Gao School of Information and Communication Engineering Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

As one of nonorthogonal multiple access techniques for the fifth generation mobile communications, sparse code multiple access（SCMA） can provide a better link performance than other schemes in different network scenarios. However, SCMA employs message passing algorithm（MPA） as its receiver decoding scheme which leads to higher computing complexity and restricts it’s application to low latency networks. Based on this, a dynamic message passing algorithm（DMPA） is presented in this paper for reducing calculation complexity of original MPA. In DMPA, reliability of variable node can be calculated by the pseudo posterior probability after predetermined iterations, and then messages are propagated merely in subgraph of original factor graph which can result in a significant reduction in complexity. Simulation results show that DMPA can reduce decoding complexity about 37% than MPA with negligible bit error rate（BER） degradation.

关键词： SCMA（Sparse Code Multiple Access） MPA（Message Passing Algorithm） BER（Bit error rate） complexity

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Consistent-estimated eigenvalues based cooperative spectrum sensing for dense cognitive Small Cell network

Consistent-estimated eigenvalues based cooperative spectrum ...

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IEEE International Conference on Communications Workshops, ICC

作者： Meng Zhao Caili Guo Chunyan Feng Shuo Chen Beijing Laboratory of Advanced Information Networks Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781509015269

In this paper, we consider the spectrum sensing problem of detecting a primary signal of a macro cell in a cognitive radio network by employing multiple dense small cell base stations. In consideration of the number of cooperative small cells (sample dimension) is comparable to the number of sample (sample size) due to the dense deployment of small cells, sample covariance matrix is no more a good estimator of statistical covariance matrix. A consistent-estimated eigenvalues based cooperative spectrum sensing (CEE-CSS) algorithm is proposed by utilizing consistent estimators of eigenvalues which are proven to be consistent when the sample dimension goes to infinity at the same rate as sample size. Effect of the eigenvalue splitting condition on sensing performance of the CEE-CSS is analyzed through simulations. Further simulation results present that the proposed CEE-CSS enables better sensing performance than a maximum-minimum eigenvalue detection based on oracle approximating shrinkage estimator (OAS-MME).

关键词： Sensors Eigenvalues and eigenfunctions Covariance matrices Microprocessors Computer architecture Market research Estimation

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A Spatial Dimming Scheme Based on Transmit Antenna Selection for Multiuser MISO VLC systems

A Spatial Dimming Scheme Based on Transmit Antenna Selection...

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International Conference on Communications Workshops

作者： Zhen Feng Caili Guo Yang Yang Chunyan Feng Beijing Laboratory of Advanced Information Networks Beijing University of Posts and Telecommunications China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications China

ISBN: (纸本)9781509015269

The multi-user multiple-input single-output (MU-MISO) visible light communications (VLC) system, which can serve multi-users simultaneously, have been widely studied in recent years. Dimming control is one of the main topics in VLC systems. In this paper, we proposed a novel transmit antenna selection based spatial dimming (TAS-SD) scheme for zero forcing (ZF) precoded MU-MISO VLC systems. By taking full advantage of the channel state information at both the transmitter and the users, the proposed TAS-SD scheme can combine the precoding and transmit antenna selection (TAS) technique together, and effectively improves the performance of dimmable MU-MISO systems. Simulation results show that the proposed TAS-SD scheme has significant bit error-ratio performance gains over the conventional analog dimming (AD) scheme at various dimming proportions and user positions. These advantages make it a promising candidate dimming scheme for ZF precoded MU-MISO VLC systems.

关键词： Multiuser MISO VLC

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Analyzing human mobility and social relationships from cellular network data

Analyzing human mobility and social relationships from cellu...

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International Conference on network and Service Management

作者： Zheng Liu Yuanyuan Qiao Siyan Tao Wenhui Lin Jie Yang BUPT Beijing Key Laboratory of Network System Architecture and Convergence and Beijing Laboratory of Advanced Information Networks Beijing China Technology Research Institute Aisino Corporation Beijing China

Due to geographic and social constraints, human mobility shows a high degree of temporal and spatial regularity. More recently, emerging data tagged with geographical information can be used to study human mobility patterns. People usually spend most of their time at a few key important locations, such as home and work places. And for users with a certain social connection-co-workers or co-life, they often stay at the same locations. In this paper, firstly, we use an algorithm to identify important locations. After that, we find that the similarity between the two trajectories is closely related to their proximity in the location-based social network, where users having the same important locations are connected. In order to embody social contacts in mobility, for hourly variations in mobility similarity, we apply unsupervised clustering method to identify four categories of social ties. Finally, we further propose the unsupervised method and supervised method to predict which new links will develop in a social location-based network. We believe our finding can contribute to urban planning especially in areas of functional zone, transportation infrastructure deployment and mobile network facilities development.

关键词： Social network services Base stations Correlation Mobile computing Trajectory Cellular networks

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AP LOAD BALANCE BASED HANDOVER IN SOFTWARE DEFINED WiFi systemS 5

AP LOAD BALANCE BASED HANDOVER IN SOFTWARE DEFINED WiFi SYST...

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2016 5th IEEE International Conference on network Infrastructure and Digital Content(IC-NIDC 2016)

作者： Nahida Kiran Yin Changchuan Zaid Akram Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781509012473

In existing wireless systems it's hard for an operator to change the network strategy under heavy load due to its proprietary and inflexible hardware based *** paper explores the concept of software defined networking(SDN) in wireless *** access point(AP) load balance based handover scheme in SDN WiFi systems is proposed for overlapping wireless local area network cells to take efficient handover based on AP *** implemented the proposed load balancing handover scheme in Mininet-WiFi emulator which could handle the APs from a centralized controller and help the test client determine how and when to connect with the right AP and take efficient handover based on AP *** interface is added with the station,client's traffic is tested at different positions and improved throughput for mobile clients is *** results show that total network throughput is enhanced after a successful handover.

关键词： Software defined networking Wireless networks Mini-net Mininet-WiFi

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Research and Analysis of Browsing Habits of New Media Audiences on the Chinese Campus

Research and Analysis of Browsing Habits of New Media Audien...

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2017 2nd International Conference on Wireless Communication and network Engineering(WCNE 2017)

作者： Dong-jun HAN Qiu-jian LV Jie YANG Center for Data Science Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and ConvergenceBUPT Institute of Information Engineering Chinese Academy of Sciences

Audience research is such a hit nowadays, and always has been based on web logs modeling. However, the content data of articles has not been considered yet. So, this paper clusters the ordered word vectors of an article to analyze audiences browsing habits of Chinese campus. This paper first obtains the contents and page views of articles from We Chat official accounts of several Chinese campuses. Then, it analyzes the audiences by clustering the ordered word vectors of the articles they have been read. To do so, the articles are first converted into a word vector model through Jieba word segmentation and word2vec, and then TF-IDF is applied for weight sequencing. Finally, the distances between articles are obtained by calculating the mean sum of square of the distances between words. Also, we cluster contents according to their topics and obtain many meaningful results. This paper provides a new method of audience analysis based on semantic, which can simplify the manual classification process of articles, and provide more comprehensive analysis conclusions. Moreover, these analysis results are useful for the strategy of content production and precious marketing.

关键词： Campus new media Audience analysis Word vector Article clustering

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A Pattern Division Multiple Access Scheme with Low Complexity Iterative Receiver for 5G Wireless Communication systems

A Pattern Division Multiple Access Scheme with Low Complexit...

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IEEE Vehicular Technology Conference

作者： Kai Zhang Jin Xu Changchuan Yin Chunyu Pan Weiqiang Tan Guixian Xu Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing 100876 P. R. China Zhengzhou University of Light Industry School of Computer and Communication Engineering Zhengzhou 450001 P. R. China Guangzhou University School of Computer Science and Educational Software Guangzhou 510006 P. R. China Aalborg University Department of Electronic Systems Aalborg 9400 Denmark

ISBN: (纸本)9781538663592;9781538663585

Non-orthogonal multiple access schemes with higher spectral efficiency and the capability of accessing more users than orthogonal multiple access (OMA) scheme is preferred for the fifth generation (5G) wireless networks. In this work, a non-orthogonal transmission scheme called pattern division multiple access (PDMA) is proposed for the 5G wireless communication systems. Two pattern matrices are proposed for 150% and 200% overloaded PDMA systems. Then, a low complexity symbol-wise belief propagation iterative detection and decoding (BPIDD) algorithm for multiple user detection is proposed. Numerical results and analysis provided by utilizing extrinsic information transfer chart show that the proposed scheme outperforms the traditional OMA systems significantly, and the performance of the proposed scheme is better than that of the existing schemes up to 1 dB. Finally, simulation results show that the proposed scheme is superior to the existing schemes and the proposed BPIDD algorithm is better than that of the BP algorithm over 0.5 dB.

关键词： 5G mobile communication iterative decoding matrix algebra multi-access systems multiuser detection Multi access systems matrix algebra Multiuser detection Iterative decoding multiple access Wireless communication systems Scheme iterative receiver spectral efficiency Information Transfer

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A NOVEL USER-CENTRIC COMP SCHEME FOR ENERGY EFFICIENCY OF DENSE HETEROGENEOUS network 5

A NOVEL USER-CENTRIC COMP SCHEME FOR ENERGY EFFICIENCY OF DE...

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2016 5th IEEE International Conference on network Infrastructure and Digital Content(IC-NIDC 2016)

作者： Xueying Li Hailun Xia Zhimin Zeng Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications

ISBN: (纸本)9781509012473

In this paper,we investigate a user-centric Coordinated Multiple Point(CoMP) transmission scheme to improve Energy Efficiency(EE) in dense Heterogeneous network(HetNet),which takes advantage of both Dynamic Point Reduced Power(DPRP) and Joint Transmission(JT).DPRP with a user voting method rather than Dynamic Point Blanking(DPB) is introduced to fully use the power while reducing energy consumption and mitigating inter-cell *** pattern of reducing power is decided in a user-centric ***,CoMP user equipments(CUEs) report to two base stations(BSs) to inform their urgency of CUEs to reduce *** the BSs reduce power on some resource blocks(RBs) which affect most UEs so as to get EE *** with overlapping cooperation set is applied only to the CUEs to improve their throughput,therefore not bringing too much pressure to *** cooperation set of JT is decided by CUEs instead of the location of BSs to better adapt to the requirement of *** results show that the scheme we proposed can improve EE obviously without leading to too much drop in user throughput.

关键词： CoMP Power allocation Dense heterogeneous network Energy efficiency

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