Match!
Chen Wei
Tsinghua University
214Publications
26H-index
2,339Citations
Publications 208
Newest
Proactive caching holds the promise of coping with the explosively increasing traffic demands of next generation mobile networks. However, it may also incur extra pushing and storage costs for base stations (BSs). By taking these costs into account, we are interested in maximizing the average profit for the BS. A joint pushing and caching (JPC) approach is investigated to determine whether and when to push and how long a file should be cached at the user’s buffer. More specifically, we present a...
Source
#1Yalei Wang (THU: Tsinghua University)
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Being capable of characterizing the freshness of information, Age of Information (AoI) has attracted much attention recently. To provide better real-time service over fading channels, efficient scheduling methods are highly desired for wireless transmissions with freshness requirements. However, due to the channel instability and arrival randomness, it is challenging to achieve the optimal AoI. In this paper, we are interested in the AoI-optimal transmissions with truncated channel inversion, wh...
#1Qianqian Cheng (NPU: Northwestern Polytechnical University)
#2Lixin Li (NPU: Northwestern Polytechnical University)H-Index: 6
Last.Zhu Han (UH: University of Houston)H-Index: 79
view all 7 authors...
In unmanned aerial vehicle (UAV)-assisted mmWave networks, the beam-steering issue is a significant challenge to establish the reliable and steady connection between flying base stations and ground users. In this paper, we investigate the optimization problem of beam-steering in the multi-UAVs and multi-antennas mmWave (MUMA) networks to maximize the system sum-rate by adjusting each beam-steering angle of departure. In order to solve this problem, we propose a novel mean field game (MFG)-based ...
Source
#1Zhiyuan Lin (THU: Tsinghua University)
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Proactive caching is recognized as a promising approach to handle the rapid growth of data traffic, thereby attracting much attention recently. As a key performance metric of caching, the hit ratio is determined by demand probabilities of users for content items and caching decisions. Because the recommendation system is capable of shaping user demands, the joint caching and recommendation holds the potential of improving the hit ratio substantially. In this paper, joint pushing and recommendati...
Source
#1Hao Li (Tongji University)
#2Aozhou Wu (Tongji University)
Last.Chen Wei (THU: Tsinghua University)H-Index: 26
view all 7 authors...
Resonant Beam Charging (RBC) is a wireless charging technology which supports multi-watt power transfer over meter-level distance. The features of safety, mobility and simultaneous charging capability enable RBC to charge multiple mobile devices safely at the same time. To detect the devices that need to be charged, a Mask R-CNN based dection model is proposed in previous work. However, considering the constraints of the RBC system, it's not easy to apply Mask R-CNN in lightweight hardware-embed...
Source
#1Khaled Ben LetaiefH-Index: 66
#2Chen WeiH-Index: 26
Last.Ying-Jun Angela ZhangH-Index: 2
view all 5 authors...
The recent upsurge of diversified mobile applications, especially those supported by AI, is spurring heated discussions on the future evolution of wireless communications. While 5G is being deployed around the world, efforts from industry and academia have started to look beyond 5G and conceptualize 6G. We envision 6G to undergo an unprecedented transformation that will make it substantially different from the previous generations of wireless cellular systems. In particular, 6G will go beyond mo...
24 CitationsSource
#1Xiaoyu Zhao (THU: Tsinghua University)
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Non-orthogonal multiple access (NOMA) has attracted great attention in the fifth-generation (5G) system to meet the rapidly increasing demand on quality of service (QoS). Among various QoS requirements, the urgent latency requirement has been expected to be provided for the delay-sensitive applications. In this paper, the delay-optimal uplink transmission in NOMA is studied over a block fading channel based on a cross-layer design, by which average latency is minimized with reliability provided ...
Source
#1Hoshyar Mohammed (THU: Tsinghua University)
#2Zhijie Chen (Stanford University)
Last.Chen Wei (THU: Tsinghua University)H-Index: 26
view all 3 authors...
Content caching provides a rare trade-off opportunity between low-cost memory and energy consumption, yet finding the optimal causal policy with low computational complexity remains a challenge. In this paper, we formulate the problem of joint pushing and caching at end users in a Markov decision process (MDP) framework with the aim of minimizing energy cost under causal knowledge of the user request delay information and strict delay constraint. We put forth a novel approach to decouple the inf...
Source
#1Wei Huang (THU: Tsinghua University)H-Index: 2
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last.H. Vincent Poor (Princeton University)H-Index: 98
view all 3 authors...
Proactively pushing content to users has emerged as a promising approach to improve the spectrum usage in off-peak times for fifth-generation mobile networks. However, owing to the uncertainty of future user demands, base stations (BSs) may not receive payments for the pushed files. To motivate content pushing, providing economic incentives to BSs becomes essential. Based on request delay information (RDI) that characterizes the users’ request time for content files, this paper studies the profi...
Source
May 1, 2019 in ICC (International Conference on Communications)
#1Meng Wang (THU: Tsinghua University)H-Index: 4
#2Chen Wei (THU: Tsinghua University)H-Index: 26
Last.Anthony Ephremides (UMD: University of Maryland, College Park)H-Index: 51
view all 3 authors...
For the emerging Internet of Things (IoT), one of the most important basic problems is how to reconstruct signals in real-time from a set of under-sampled and delayed samples. The sampling omits the details of the signals of interest and the delayed samples against the requirement of real-time. As a result, distortion occurs between the interested signal and the reconstructed signal. In this paper, we focus on minimizing the average distortion defined as the 1-norm of the difference of the two s...
1 CitationsSource
12345678910