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The Chinese University of Hong Kong
(100 results)-
White Papers
Optimization Techniques in Wireless Communications
September 6, 2009, 12:00am PDT
This paper collects several research results on the use of optimization techniques in wireless communications. Recent advances in linear and nonlinear optimization facilitate progress in many...
Provided by Chinese University of Hong Kong
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White Papers
Solutions to Performance Problems in VoIP Over 802.11 Wireless LAN
August 17, 2004, 12:00am PDT
VoIP over WLAN is poised to become an important Internet application. However, two major technical problems that stand in the way are low VoIP capacity in WLAN and unacceptable VoIP performance in...
Provided by Chinese University of Hong Kong
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White Papers
Peer Clustering and Firework Query Model
January 1, 2010, 12:00am PST
The importance of distributed information sharing systems has been confirmed by the appearance and popularity of P2P applications such as Gnutella and Napster. One problem that the users face with...
Provided by Chinese University of Hong Kong
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White Papers
DCAR: Distributed Coding-Aware Routing in Wireless Networks
March 23, 2008, 12:00am PDT
The practical network coding system proposed in has two fundamental limitations like the coding opportunity is crucially dependent on the established routes; the coding structure is limited within...
Provided by Chinese University of Hong Kong
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White Papers
Degree Bounded Network Design With Metric Costs
August 12, 2008, 12:00am PDT
Given a complete undirected graph, a cost function on edges and a degree bound B, the degree bounded network design problem is to find a minimum cost simple subgraph with maximum degree B...
Provided by Chinese University of Hong Kong
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White Papers
On the Detection of Signaling DoS Attacks on 3G/WiMax Wireless Networks
April 27, 2009, 12:00am PDT
Third Generation (3G) wireless networks based on the CDMA2000 and UMTS standards are now increasingly being deployed throughout the world. Because of their complex signaling and relatively limited...
Provided by Chinese University of Hong Kong
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White Papers
Holistic Twig Joins on Indexed XML Documents
January 1, 2010, 12:00am PST
Finding all the occurrences of a twig pat-tern specified by a selection predicate on multiple elements in an XML document is a core operation for efficient evaluation of XML queries. Holistic twig...
Provided by Chinese University of Hong Kong
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White Papers
Evolutionary Game and Learning for Dynamic Spectrum Access
March 5, 2011, 12:00am PST
Efficient dynamic spectrum access mechanism is crucial for improving the spectrum utilization. In this paper, the authors consider the dynamic spectrum access mechanism design with both complete...
Provided by Chinese University of Hong Kong
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White Papers
Revenue Maximization for Communication Networks With Usage-Based Pricing
November 4, 2010, 12:00am PDT
The authors study the optimal usage-based pricing problem in a resource-constrained network with one profit-maximizing Service Provider (SP) and multiple groups of surplus-maximizing users. With...
Provided by Chinese University of Hong Kong
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White Papers
Proportional Fairness in Multi-Channel Multi-Rate Wireless Networks - Part I: The Case of Deterministic Channels With Application to AP Association Problem in Large-Scale WLAN
February 22, 2008, 12:00am PST
This is Part I of a two-part paper series that studies the use of the Proportional Fairness (PF) utility function as the basis for resource allocation and scheduling in multi-channel multi-rate...
Provided by Chinese University of Hong Kong
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White Papers
Safe Carrier Sensing Range in CSMA Network Under Physical Interference Model
January 23, 2009, 12:00am PST
In this paper, the authors study the setting of carrier-sensing range in 802.11 networks under the (cumulative) physical interference model. Specifically, they identify a carrier-sensing range...
Provided by Chinese University of Hong Kong
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White Papers
On Oligopoly Spectrum Allocation Game in Cognitive Radio Networks With Capacity Constraints
June 16, 2009, 12:00am PDT
Dynamic spectrum sharing is a promising technology to improve spectrum utilization in the future wireless networks. The flexible spectrum management provides new opportunities for licensed primary...
Provided by Chinese University of Hong Kong
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White Papers
pCloud: A Distributed System for Practical PIR
June 23, 2010, 12:00am PDT
computational Private Information Retrieval (cPIR) protocols allow a client to retrieve one bit from a database, without the server inferring any information about the queried bit. These protocols...
Provided by Chinese University of Hong Kong
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White Papers
Auction-Based Distributed Resource Allocation for Cooperation Transmission in Wireless Networks
August 4, 2007, 12:00am PDT
Cooperative transmission can greatly improve communication system performance by taking advantage of the broadcast nature of wireless channels. Most previous work on resource allocation for...
Provided by Chinese University of Hong Kong
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White Papers
A Mash-Up of the Tracking System and Real-Time Monitoring System Based on MAS
December 1, 2006, 12:00am PST
In this paper, Mash-up, Multi Agent System (MAS) Architecture and GPS, GIS and Wireless Communication technologies were discussed. New application architecture of complex vehicle Location Based...
Provided by Chinese University of Hong Kong
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White Papers
Minimality Attack in Privacy Preserving Data Publishing Technical Report TR 2006-28
January 1, 2011, 12:00am PST
Data publishing generates much concern over the protection of individual privacy. In the well-known k-anonymity model and the related models such as l-diversity and (รก k)-anonymity, the adversary...
Provided by Chinese University of Hong Kong
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White Papers
Interference With Symbol-Misalignment
August 24, 2009, 12:00am PDT
This paper studies the impact of interference asynchrony among different links in a wireless network. Without deliberate coordination and cooperation among the active links, there is a naturally...
Provided by Chinese University of Hong Kong
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White Papers
Effective Carrier Sensing in CSMA Networks Under Cumulative Interference
December 11, 2009, 12:00am PST
This paper proposes and investigates the concept of a safe carrier-sensing range that can guarantee interference-safe (also termed hidden-node-free) transmissions in CSMA networks under the...
Provided by Chinese University of Hong Kong
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White Papers
Joint Face Alignment With a Generic Deformable Face Model
April 6, 2011, 12:00am PDT
As having multiple images of an object is practically convenient nowadays, to jointly align them is important for subsequent studies and a wide range of applications. In this paper, the authors...
Provided by Chinese University of Hong Kong
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White Papers
Single Image Haze Removal Using Dark Channel Prior
March 22, 2009, 12:00am PDT
In this paper, the authors propose a simple but effective image prior - dark channel prior to remove haze from a single input image. The dark channel prior is a kind of statistics of the haze-free...
Provided by Chinese University of Hong Kong
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White Papers
Software Reliability Engineering: A Roadmap
April 17, 2007, 12:00am PDT
Software reliability engineering is focused on engineering techniques for developing and maintaining software systems whose reliability can be quantitatively evaluated. In order to estimate as...
Provided by Chinese University of Hong Kong
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Software
Liver Calc 1.5 (Mobile)
February 24, 2011, 12:00am PST
Liver Calc is a medical calculator with 15 commonly used formulas tailored for hepatologist. Developed by hepatologist from Center for Liver Helath, The Chinese University of Hong Kong, livercalc...
Provided by The Chinese University of Hong Kong
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White Papers
ERP Implementation In China: Brief Summary And Case Study
June 14, 2007, 12:00am PDT
This paper is a summary of or study on several ERP implementation projects in China from 2002. These projects cover several industries including manufacturing, port and electricity. The authors...
Provided by Chinese University of Hong Kong
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White Papers
On Collision-Tolerant Transmission With Directional Antennas
October 1, 2007, 12:00am PDT
The application of directional antennas in wireless networks brings numerous benefits, such as increased spatial reuse and mitigated interferences. Most MAC protocols with directional antennas are...
Provided by Chinese University of Hong Kong
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White Papers
Link Scheduling in Multi-Transmit-Receive Wireless Networks
July 11, 2011, 12:00am PDT
This paper investigates the problem of link scheduling to meet traffic demands with minimum airtime in a Multi-Transmit-Receive (MTR) wireless network. MTR networks are a new class of networks, in...
Provided by Chinese University of Hong Kong
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White Papers
FADE: Secure Overlay Cloud Storage With File Assured Deletion
June 29, 2010, 12:00am PDT
While one can now outsource data backup to third-party cloud storage services so as to reduce data management costs, security concerns arise in terms of ensuring the privacy and integrity of...
Provided by Chinese University of Hong Kong
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White Papers
Collision-Tolerant Transmission With Narrow-Beam Antennas
December 30, 2008, 12:00am PST
The application of directional antennas in wireless ad hoc networks brings numerous benefits, such as increased spatial reuse and mitigated interference. Most MAC protocols with directional...
Provided by Chinese University of Hong Kong
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White Papers
Distributing Layered Encoded Video Through Caches
January 1, 2011, 12:00am PST
The efficient distribution of stored information has become a major concern in the Internet which has increasingly become a vehicle for the transport of stored video. Because of the highly...
Provided by Chinese University of Hong Kong
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White Papers
Optimal Decoding Algorithm for Asynchronous Physical-Layer Network Coding
February 11, 2011, 12:00am PST
A key issue in Physical-layer Network Coding (PNC) is how to deal with the asynchrony between signals transmitted by multiple transmitters. That is, symbols transmitted by different transmitters...
Provided by Chinese University of Hong Kong
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White Papers
Applying Physical-Layer Network Coding in Wireless Networks
February 7, 2010, 12:00am PST
A main distinguishing feature of a wireless network compared with a wired network is its broadcast nature, in which the signal transmitted by a node may reach several other nodes, and a node may...
Provided by Chinese University of Hong Kong
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White Papers
Soft Network Coding in Wireless Two-Way Relay Channels
August 27, 2009, 12:00am PDT
Application of network coding in wireless Two-Way Relay Channels (TWRC) has received much attention recently because of its ability to improve throughput significantly. In traditional designs,...
Provided by Chinese University of Hong Kong
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White Papers
Physical Layer Network Coding Schemes Over Finite and Infinite Fields
November 18, 2008, 12:00am PST
Direct application of network coding at the physical layer - Physical layer Network Coding (PNC) - is a promising technique for two-way relay wireless networks. In a two-way relay network, relay...
Provided by Chinese University of Hong Kong
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White Papers
Joint Design of Network Coding and Channel Decoding for Wireless Networks
July 13, 2007, 12:00am PDT
Network coding has been receiving much attention recently for its ability to improve network throughput and enhance network robustness. In this paper, the authors investigate the design of network...
Provided by Chinese University of Hong Kong
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White Papers
Temporal Starvation in CSMA Wireless Networks
February 10, 2011, 12:00am PST
It is well known that links in CSMA wireless networks are prone to starvation. Prior works focused almost exclusively on equilibrium starvation. In this paper, the authors show that links in CSMA...
Provided by Chinese University of Hong Kong
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White Papers
On the Performance of TCP Over Throughput-Optimal CSMA
May 18, 2011, 12:00am PDT
An interesting distributed throughput-optimal CSMA MAC protocol, called adaptive CSMA, was proposed recently to schedule any strictly feasible rates inside the capacity region. Of particular...
Provided by Chinese University of Hong Kong
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White Papers
Merit of PHY-MAC Cross-Layer Carrier Sensing: A MAC-Address-Based Physical Carrier Sensing Scheme for Solving Hidden-Node and Exposed-Node Problems in Large-Scale Wi-Fi Networks
August 17, 2006, 12:00am PDT
This paper examines how various carrier-sensing schemes affect the Exposed-Node (EN) and Hidden-Node (HN) phenomena. In the process, the authors identify a new carrier-sensing mechanism for...
Provided by Chinese University of Hong Kong
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White Papers
Distributed Adaptive Power Control in IEEE 802.11 Wireless Networks
July 25, 2006, 12:00am PDT
Optimizing spectral reuse is a major issue in large-scale IEEE 802.11 wireless networks. Power control is an effective means for doing so. Much previous work simply assumes that each transmitter...
Provided by Chinese University of Hong Kong
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White Papers
Joint Scheduling and Resource Allocation in Uplink OFDM Systems
October 28, 2008, 12:00am PDT
Orthogonal Frequency Division Multiplexing (OFDM) with dynamic scheduling and resource allocation is widely considered to be a key component of most emerging broadband wireless access networks...
Provided by Chinese University of Hong Kong
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White Papers
On the Degree of Freedom for Multi-Source Multi-Destination Wireless Network With Multi-Layer Relays
January 12, 2011, 12:00am PST
Degree of Freedom (DoF) region provides an approximation of capacity region in high Signal-to-Noise Ratio (SNR) regime, while sum DoF gives the scaling factor. In this correspondence, the authors...
Provided by Chinese University of Hong Kong
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White Papers
Attack Prevention for Collaborative Spectrum Sensing in Cognitive Radio Networks
September 5, 2011, 12:00am PDT
Collaborative spectrum sensing can significantly improve the detection performance of Secondary Unlicensed users (SUs). However, the performance of collaborative sensing is vulnerable to sensing...
Provided by Chinese University of Hong Kong
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White Papers
Learning Equilibrium Play for Stochastic Parallel Gaussian Interference Channels
March 19, 2011, 12:00am PDT
Distributed power control for parallel Gaussian interference channels recently draws great interests. However, all existing works only studied this problem under deterministic communication...
Provided by The Chinese University of Hong Kong
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White Papers
Power Allocation for Multiuser Cooperative Communication Networks Under Relay Selection Degree Bounds
May 15, 2012, 12:00am PDT
This paper considers the joint power allocation and relay selection problem in multiuser cooperative communication networks, where one user can only seek a limited number of relays for...
Provided by The Chinese University of Hong Kong
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White Papers
NCCloud: Applying Network Coding for the Storage Repair in a Cloud-of-Clouds
January 22, 2012, 12:00am PST
To provide fault tolerance for cloud storage, recent studies propose to stripe data across multiple cloud vendors. However, if a cloud suffers from a permanent failure and loses all its data, then...
Provided by Chinese University of Hong Kong
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Software
Food Composition Database 1.0 (Mobile)
February 28, 2012, 12:00am PST
, 2007 7 (),,,About UsSponsored by the Hong Kong Jockey Club Charities Trust and the Food and Environmental Hygiene Department, The Chinese University of Hong Kong Food Research Centre (FRC) has...
Provided by Food Research Centre of The Chinese University of Hong Kong
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Software
TLRC AppsMaster 201202001 (Mobile)
April 6, 2012, 12:00am PDT
AppsMaster is an innovative app that enables teachers to put their existing teaching materials on an iPad, without the need for sophisticated programming.This simple utility acts as a bridge...
Provided by The Teaching and Learning Resource Centre, Faculty of Medicine, The Chinese University of Hong Kong
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White Papers
Homomorphic Encryption From Codes
November 18, 2011, 12:00am PST
The authors propose a new homomorphic encryption scheme based on the hardness of decoding under independent random noise from certain affine families of codes. Unlike in previous lattice-based...
Provided by Chinese University of Hong Kong
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White Papers
Secure Compressed Reading in Smart Grids
August 7, 2011, 12:00am PDT
Smart Grids measure energy usage in real-time and tailor supply and delivery accordingly, in order to improve power transmission and distribution. For the grids to operate effectively, it is...
Provided by Chinese University of Hong Kong
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White Papers
On Resource Management for Cloud Users: A Generalized Kelly Mechanism Approach
July 30, 2010, 12:00am PDT
Cloud computing provides network software companies with a platform to develop Software as a Service (SaaS) applications. The pay-as-you-go pricing model unties these SaaS providers from large...
Provided by Chinese University of Hong Kong
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White Papers
On Optimality of Routing for Multi-Source Multicast Communication Scenarios With Node Uplink Constraints
April 30, 2008, 12:00am PDT
The authors consider multi-source multicast communication scenarios in which each node has an aggregate outbound traffic capacity and can directly communicate with any other node. This is...
Provided by Chinese University of Hong Kong
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White Papers
Queuing Models for Peer-to-Peer Systems
April 27, 2009, 12:00am PDT
Recent development of Peer-To-Peer (P2P) services (e.g. streaming, file sharing, and storage) systems introduces a new type of queue systems not studied before. In these new systems, both job and...
Provided by Chinese University of Hong Kong
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White Papers
Optimal Distributed P2P Streaming Under Node Degree Bounds
September 6, 2010, 12:00am PDT
The authors study the problem of maximizing the broadcast rate in Peer-To-Peer (P2P) systems under node degree bounds, i.e., the number of neighbors a node can simultaneously connect to is...
Provided by Chinese University of Hong Kong
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White Papers
Celerity: A Low-Delay Multi-Party Conferencing Solution
July 26, 2011, 12:00am PDT
In this paper, the authors attempt to revisit the problem of multi-party conferencing from a practical perspective, and to rethink the design space involved in this problem. They believe that an...
Provided by Chinese University of Hong Kong
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White Papers
On the Role of Network Coding in Uncoordinated Multihop Content Distribution Over Ad Hoc Networks
July 30, 2011, 12:00am PDT
The authors consider the problem of multi-hop communication in ad hoc networks. This work was originally motivated by vehicular networks, and has application in numerous fields. The key constraint...
Provided by Chinese University of Hong Kong
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White Papers
Distributed Optimization for Combinatorial Coding Subgraph Selection Problems
May 20, 2011, 12:00am PDT
Many network design cases with network coding can be formulated as combinatorial optimization problems, which are NP-hard and hard to approximate even in a centralized manner. In this paper,...
Provided by Chinese University of Hong Kong
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White Papers
Amplify-and-Forward in Wireless Relay Networks
August 18, 2011, 12:00am PDT
A general class of wireless relay networks with a single source-destination pair is considered. Intermediate nodes in the network employ an amplify-and-forward scheme to relay their input signals....
Provided by Chinese University of Hong Kong
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White Papers
P2P Streaming Capacity
February 1, 2011, 12:00am PST
Peer-To-Peer (P2P) systems provide a scalable way to stream content to multiple receivers over the Internet. The maximum rate achievable by all receivers is the capacity of a P2P streaming...
Provided by Chinese University of Hong Kong
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White Papers
Spectrum Mobility Games
January 10, 2012, 12:00am PST
Cognitive radio gives users the ability to switch channels and make use of dynamic spectrum opportunities. However, switching channels takes time, and may affect the quality of a user's...
Provided by Chinese University of Hong Kong
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White Papers
Incentive Mechanisms for Smartphone Collaboration in Data Acquisition and Distributed Computing
January 15, 2012, 12:00am PST
This paper analyzes and compares different incentive mechanisms for a client to motivate the collaboration of smartphone users on both data acquisition and distributed computing applications. Data...
Provided by Chinese University of Hong Kong
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White Papers
Optimal Resource Allocation for OFDM Uplink Communication: A Primal-Dual Approach
February 24, 2008, 12:00am PST
Orthogonal Frequency Division Multiplexing (OFDM) with dynamic resource allocation is widely considered to be a key component of most emerging broadband wireless access networks. However, resource...
Provided by Chinese University of Hong Kong
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White Papers
Peer-to-Peer Utility Maximization
February 25, 2008, 12:00am PST
In this paper, the authors study the problem of utility maximization in Peer-To-Peer (P2P) systems, in which aggregate utilities are maximized by running distributed algorithms on P2P nodes that...
Provided by Chinese University of Hong Kong
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White Papers
ISP Uplink Pricing in a Competitive Market
April 9, 2008, 12:00am PDT
In recent years, the upgrade of access networks to broadband networks together with the P2P technology has brought many new applications to the Internet. P2P applications have quickly become the...
Provided by Chinese University of Hong Kong
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White Papers
Fairness of Traffic Controls for Inelastic Flows in the Internet
October 1, 2006, 12:00am PDT
In best-effort networks, fairness has been used as a criterion to guide the design of traffic controls. The notion of fairness has evolved over time, from simple equality to a form of equality...
Provided by Chinese University of Hong Kong
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White Papers
Performance Metrics and Configuration Strategies for Group Network Communication
April 22, 2007, 12:00am PDT
There is an increasing number of group-based multimedia applications over the Internet, for example, voice conference or multi-player games. For these applications, it is often necessary to select...
Provided by Chinese University of Hong Kong
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White Papers
Application Identification Based on Network Behavioral Profiles
April 2, 2008, 12:00am PDT
Accurate identification of network applications is important to many network activities. Traditional port-based technique has become much less effective since many new applications no longer use...
Provided by Chinese University of Hong Kong
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White Papers
Adaptive Flow Aggregation - A New Solution for Robust Flow Monitoring Under Security Attacks
August 3, 2006, 12:00am PDT
Flow-level traffic measurement is required for a wide range of applications including accounting, network planning and security management. A key design challenge is how to gracefully deal with...
Provided by Chinese University of Hong Kong
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White Papers
On the Practical and Security Issues of Batch Content Distribution Via Network Coding
January 1, 2012, 12:00am PST
File distribution via network coding has received a lot of attention lately. However, direct application of network coding may have security problems. In particular, attackers can inject "Faked"...
Provided by Chinese University of Hong Kong
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White Papers
Peer-to-Peer Replication With Preferences
February 8, 2007, 12:00am PST
In this paper, the authors investigate decentralized and cooperative resource allocation problems in a class of P2P systems that provide replication service. Unlike conventional structured...
Provided by Chinese University of Hong Kong
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White Papers
Decentralized Replication Algorithms for Improving File Availability in P2P Networks
July 14, 2007, 12:00am PDT
Being autonomous and scalable, Peer-to-Peer systems provide a paradigm for sharing files in the Internet. However, different from conventional structured replication systems like Content...
Provided by Chinese University of Hong Kong
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White Papers
The Delicate Tradeoffs in BitTorrent-Like File Sharing Protocol Design
January 1, 2012, 12:00am PST
The BitTorrent (BT) file sharing protocol is popular due to its scalability property and the incentive mechanism to reduce free-riding. However, in designing such P2P file sharing protocols, there...
Provided by Chinese University of Hong Kong
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White Papers
Designs and Evaluation of a Tracker in P2P Networks
November 26, 2008, 12:00am PST
The "Tracker" of a P2P system is used to lookup which peers hold (or partially hold) a given object. There are various designs for the tracker function, from a single-server tracker, to...
Provided by Chinese University of Hong Kong
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White Papers
Analysis of Load Balancing Algorithms in P2P Streaming
September 27, 2008, 12:00am PDT
In unstructured P2P content distribution systems, the most important algorithms to ensure optimal flow of content along multiple dynamically created distribution trees are piece selection...
Provided by Chinese University of Hong Kong
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White Papers
A Simple Model for a Generic Class of P2P Streaming Algorithms
June 7, 2010, 12:00am PDT
P2P streaming tries to achieve scalability (like P2P file distribution) and at the same time meet real-time playback requirements. It is a challenging problem still not well understood. In this...
Provided by Chinese University of Hong Kong
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White Papers
Exploring the Optimal Chunk Selection Policy for Data-Driven P2P Streaming Systems
June 24, 2009, 12:00am PDT
Data-driven P2P streaming systems can potentially provide good playback rate to a large number of viewers. One important design problem in such P2P systems is to determine the optimal chunk...
Provided by Chinese University of Hong Kong
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White Papers
On 3-Receiver Broadcast Channels With 2-Degraded Message Sets
January 2, 2009, 12:00am PST
The broadcast channel with degraded message sets was initially studied by Korner and Marton for two receivers and more recently for three and more receivers. Korner and Marton established the...
Provided by Chinese University of Hong Kong
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White Papers
Capacity Regions of Two New Classes of 2-Receiver Broadcast Channels
April 7, 2009, 12:00am PDT
Motivated by a simple broadcast channel, the authors generalize the notions of a less noisy receiver and a more capable receiver to an essentially less noisy receiver and an essentially more...
Provided by Chinese University of Hong Kong
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White Papers
An Achievable Rate Region for the 2-Receiver Broadcast Channel Obtained by Viewing It as an Interference Channel
October 13, 2009, 12:00am PDT
The authors derive an achievable region for the 2-receiver broadcast channel with private messages only by incorporating ideas of message splitting as in the Han-Kobayashi scheme for the...
Provided by Chinese University of Hong Kong
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White Papers
An Information Inequality for the BSSC Channel
December 11, 2009, 12:00am PST
The authors establish an information theoretic inequality concerning the binary skew-symmetric broadcast channel that was conjectured by one of the authors. This inequality helps to quantify the...
Provided by Chinese University of Hong Kong
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White Papers
An Information Inequality and Evaluation of Marton's Inner Bound for Binary Input Broadcast Channels
January 11, 2010, 12:00am PST
The authors establish an information inequality that is intimately connected to the evaluation of the sum rate given by Marton's inner bound for two-receiver broadcast channels with a binary input...
Provided by Chinese University of Hong Kong
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White Papers
On Broadcast Channels With Binary Inputs and Symmetric Outputs
January 13, 2010, 12:00am PST
The authors study the capacity regions of broadcast channels with binary inputs and symmetric outputs. They study the partial order induced by the more capable ordering of broadcast channels for...
Provided by Chinese University of Hong Kong
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White Papers
The Capacity Region of the Three Receiver Less Noisy Broadcast Channel
January 24, 2011, 12:00am PST
The authors determine the capacity region of a 3-receiver less noisy broadcast channel. The difficulty in extending the two-receiver result to three-receivers involves extending the Csiszarsum...
Provided by Chinese University of Hong Kong
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