Showing 1-25 of 42 resultsfor "Runzi Liu"
"Runzi Liu"
- Sort
Get notified when new research is published matching your search criteria.
Sort By
Results
An Analytical Framework for Resource-Limited Small Satellite Networks
Runzi Liu;Min Sheng;King-Shan Lui;Xijun Wang;Yu Wang;Di Zhou
IEEE Communications Letters
Cited by: Papers (49)
In this letter, we propose an analytical framework for resource-limited small satellite networks. To handle the challenges raised by the intertwined impacts of energy budgets, satellites’ movements and delay requirements on data acquisition and delivery process, we extend the traditional time-expanded graph to model the data acquisition and energy managements. Based on this graph model, we formula...Show More
Dynamic Contact Plan Design in Broadband Satellite Networks With Varying Contact Capacity
IEEE Communications Letters
Cited by: Papers (33)
Contact plan design (CPD) aims to schedule conflicting forthcoming communication opportunities (i.e., contacts). In CPD, the capacity of established contacts is indeed time-varying. Neglecting such variations in contact capacity inevitably leads to system performance deterioration. In this letter, we develop a new dynamic CPD algorithm while considering the time-varying property of contacts in bro...Show More
Joint Optimization of VNF Deployment and Routing in Software Defined Satellite Networks
Ziye Jia;Min Sheng;Jiandong Li;Runzi Liu;Kun Guo;Yu Wang;Dong Chen;Rui Ding
2018 IEEE 88th Vehicular Technology Conference (VTC-Fall)
Year: 2018 | Conference Paper |
Cited by: Papers (22)
By integrating software defined network and network function virtualization, software defined satellite networks (SDSNs) can enable flexible virtual network function (VNF) deployment to process and forward end-to-end traffic flows. Since one traffic flow has to go through all its required VNFs, the VNF deployment has a significant impact on traffic routing. In this regard, with time-varying networ...Show More
Performance Analysis of Intermittent Satellite Links With Time-Limited Queuing Model
IEEE Communications Letters
Cited by: Papers (21)
System modeling and performance analysis are nontrivial issues in satellite networks. Mainstream methods model the acquire-store-forward process of traffic as a queuing process, where the transmitter and buffer work as the server and queue, respectively. However, the intermittent connectivity of satellite links hampers the direct employment of traditional vacation policies, because the inactive pe...Show More
Capacity Analysis of Two-Layered LEO/MEO Satellite Networks
Runzi Liu;Min Sheng;King-Shan Lui;Xijun Wang;Di Zhou;Yu Wang
2015 IEEE 81st Vehicular Technology Conference (VTC Spring)
Year: 2015 | Conference Paper |
Cited by: Papers (17)
In this paper, we investigate the capacity of two- layered satellite networks. Particularly, we propose a unified mathematical framework to formulate the relationship between network capacity and architectural parameters. Then we study the capacity of three typical scenarios. The analytical solutions show that the capacity of individual layer increases linearly with the link bandwidth of that laye...Show More
Antenna Slewing Time Aware Mission Scheduling in Space Networks
IEEE Communications Letters
Cited by: Papers (13)
The slow antenna slewing rate on data relay satellites is a main performance bottleneck for space networks. This letter investigates the antenna slewing time aware schedule problem aiming at maximizing the number of successful delivered missions. Particularly, we extend the traditional time-expanded graph into a new model, with which the impact of antenna slewing time on the serving sequence of an...Show More
Lifetime Maximization Routing with Guaranteed Congestion Level for Energy-Constrained LEO Satellite Networks
Di Zhou;Min Sheng;King-Shan Lui;Xijun Wang;Runzi Liu;Chao Xu;Yu Wang
2016 IEEE 83rd Vehicular Technology Conference (VTC Spring)
Year: 2016 | Conference Paper |
Cited by: Papers (8)
In energy-constrained Low Earth Orbit (LEO) satellite constellations, in order to prolong the network lifetime, more traffic should be carried by the satellites with high battery level, which, in turn, may result in congestion in such satellites. To strike a balance, we study the multi-path routing problem which aims at Maximizing network Lifetime while maintaining a Guaranteed network Congestion ...Show More
Learning to optimize for resource allocation in LTE-U networks
Guanhua Chai;Weihua Wu;Qinghai Yang;Runzi Liu;Kyung Sup Kwak
This paper proposes a deep learning (DL) resource allocation framework to achieve the harmonious coexistence between the transceiver pairs (TPs) and the Wi-Fi users in LTE-U networks. The noncon- vex resource allocation is considered as a constrained learning problem and the deep neural network (DNN) is employed to approximate the optimal resource allocation decisions through unsupervised manner. ...Show More
SIC aware high-throughput routing in multihop wireless networks
2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
Year: 2013 | Conference Paper |
Cited by: Papers (2)
Successive Interference Cancellation (SIC) is a new physical layer technique which enables the receiver to either partially cancel the interfering signals or receive more than one desired signal at a time. By fully exploring the potential advantages of SIC, we develop an SIC Aware Routing protocol, referred to as SAR, aiming at enhancing the overall end-to-end throughput. An SICable condition is d...Show More
Spectrum-efficient routing algorithms with successive interference cancellation in multi-hop wireless networks
Yu Wang;Min Sheng;King-Shan Lui;Xijun Wang;Runzi Liu;Yan Shi
2014 IEEE Wireless Communications and Networking Conference (WCNC)
Year: 2014 | Conference Paper |
Cited by: Papers (2)
Successive Interference Cancellation (SIC) is a potentially powerful technique for improving the performance of multi-hop wireless networks, owing to its ability to enable concurrent receptions from multiple transmitters as well as interference rejection. In this paper, we address the problem of finding the route with maximal end-to-end spectral efficiency in multi-hop wireless networks, under the...Show More
Scalable Random Cooperation Routing protocol for large-scale wireless sensor networks
2013 IEEE 24th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops)
Year: 2013 | Conference Paper |
Scalability is a key factor in designing routing protocols for large-scale extended wireless sensor networks. The bottleneck problem of scalability is how to cut down the average path length with tolerable overhead. In this paper, a scalable routing protocol for large-scale wireless sensor networks, referred to as SRCR (Scalable Random Cooperation Routing protocol), is proposed based on the small ...Show More
Toward a Flexible and Reconfigurable Broadband Satellite Network: Resource Management Architecture and Strategies
IEEE Wireless Communications
Cited by: Papers (114)
Traditional satellite networks are generally locked down to a specific space mission, with isolated substrate infrastructure as well as network resources. This forbids dynamic resource sharing among different networks, and thus leads to resource under utilization, poor service provisioning and unacceptable expenditure. In this regard, it is crucial to embrace emerging technologies such as software...Show More
Mission Aware Contact Plan Design in Resource-Limited Small Satellite Networks
Small satellite networks (SSNs) are playing an increasing role in nowadays earth observation due to their less development cost and energy consumption. In SSNs, it is pivotal to transmit a huge amount of data for differentiated missions to ground stations. Nevertheless, due to limited transponders and energy budget, not all contacts, i.e., potential available communication links, are feasible in d...Show More
Multi-Resource Coordinate Scheduling for Earth Observation in Space Information Networks
Yu Wang;Min Sheng;Weihua Zhuang;Shan Zhang;Ning Zhang;Runzi Liu;Jiandong Li
Space information network (SIN) is a promising networking architecture to significantly broaden the observation area and realize continuous information acquisition for earth observation. Over the dynamic and complex SIN environment, it is a key issue to coordinate multi-dimensional heterogeneous network resources (e.g., observation resource and transmission resource) in the presence of multi-resou...Show More
Channel-Aware Mission Scheduling in Broadband Data Relay Satellite Networks
Mission scheduling algorithms are envisioned as critical to satisfy the increasing mission requirements in broadband data relay satellite networks, which is severely influenced by time-varying inter-satellite contacts (i.e., potential available communication links) and differentiated satellite downlink contacts. Nevertheless, the intertwined effect of such two types of contacts on mission schedule...Show More
Collaborative Data Scheduling With Joint Forward and Backward Induction in Small Satellite Networks
Small satellite networks (SSNs) have attracted intensive research interest recently and have been regarded as an emerging architecture to accommodate the ever-increasing space data transmission demand. However, the limited number of on-board transceivers restricts the number of feasible contacts (i.e., an opportunity to transmit data over a communication link), which can be established concurrentl...Show More
Space information networks (SINs) have been designed to achieve agile acquisition, transmission, and processing of space information. Compared to traditional terrestrial communication networks comprised of mobile users and fixed resources, SINs are characterized by resource mobility, specifically in terms of resource migration, interchange, and aggregation. The resource mobility of SIN provides op...Show More
Dynamic Scheduling of Hybrid Tasks With Time Windows in Data Relay Satellite Networks
Through the allocation of multi-antenna time blocks to spacecrafts, the data relay satellite network (DRSN) is capable of providing data relay within their visible intervals (i.e., time windows). During the relay process, the generated hybrid tasks incorporate common tasks, emergency tasks, and temporary tasks. However, higher priority unpredicted tasks (i.e., emergency tasks and temporary tasks) ...Show More
Robust Resource Allocation for Vehicular Communications With Imperfect CSI
The resource allocation in vehicle-to-everything (V2X) communications face a great challenge for satisfying the heterogeneous quality of service (QoS) requirements of the ultra-reliable safety-related services and the minimum throughput required entertainment services, due to the channel uncertainties caused by high mobility. In this paper, we first consider an optimistic scenario where the distri...Show More
In this paper, we investigate the energy-efficient resource allocation problem for heterogeneous wireless network with multihomed user equipments. First, the energy-efficient resource allocation is formulated as an energy efficiency (EE) maximization problem, which is a mixed-integer nonlinear optimization (MINO) problem. We first introduce a continuity relaxation and Lagrange dual method to solve...Show More
Bandwidth-Aware High-Throughput Routing With Successive Interference Cancelation in Multihop Wireless Networks
Successive interference cancelation (SIC) is a new physical-layer technique that enables the receiver to decode composite signals from multiple transmitters sequentially. The introduction of SIC improves the path bandwidth. In this paper, we focus on the design of a bandwidth-aware routing protocol with SIC, aiming at achieving high overall end-to-end throughput. We develop an SICable condition fo...Show More
Learning-Based Resource Allocation for Ultra-Reliable V2X Networks With Partial CSI
In this paper, we study the resource allocation in high mobility vehicle-to-everything (V2X) networks with only slowly varying large-scale channel parameters. For satisfying the diversity requirements of different types of links, i.e., low delay for vehicle-to-infrastructure (V2I) connections and ultra-reliability for vehicle-to-vehicle (V2V) connections, we formulate a joint power, spectrum and v...Show More
Learning-Based Robust Resource Allocation for Ultra-Reliable V2X Communications
Weihua Wu;Runzi Liu;Qinghai Yang;Hangguan Shan;Tony Q. S. Quek
Vehicle-to-everything (V2X) communications face a great challenge in delivering not only the low-latency and ultra-reliable safety-related services but also the minimum throughput required entertainment services, due to the channel uncertainties caused by high mobility. This paper focuses on the robust resource management of V2X communications with the consideration of channel uncertainties. First...Show More
Online Spectrum Partitioning for LTE-U and WLAN Coexistence in Unlicensed Spectrum
Weihua Wu;Qinghai Yang;Runzi Liu;Tony Q. S. Quek;Kyung Sup Kwak
Long-term evolution (LTE) and wireless local area network (WLAN) are often presented as opposing technologies. Hence, efficient partitioning of the spectrum resources carries critical importance for achieving the coexistence of these on the unlicensed spectrum band. In this paper, we firstly develop an online spectrum partitioning algorithm, which needs little signal transmission and exchange betw...Show More
IEEE Account
Purchase Details
Profile Information
Need Help?
- US & Canada: +1 800 678 4333
- Worldwide: +1 732 981 0060
- Contact & Support
- About IEEE Xplore
- Contact Us
- Help
- Accessibility
- Terms of Use
- Nondiscrimination Policy
- Sitemap
- Privacy & Opting Out of Cookies
A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity.
© Copyright 2025 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.