Byoung-Joon Lee

Custodian-based information sharing

Information sharing systems such as iCloud, Dropbox, Facebook, and Twitter are ubiquitous today, but all of them depend on massive server infrastructure and always-on Internet connectivity. We have designed and implemented a sharing system that does not require infrastructure yet supports robust, distributed, secure sharing by opportunistically using any and all connectivity, local or global, permanent or transient, to communicate. One key element of this system is a new information routing model that so far has proven to be as scalable and efficient as the best of the current Internet routing protocols, while operating in an environment more complex and dynamic than they can tolerate. The new routing model is made possible by new affordances offered by information-centric networking, in particular, the open source CCN [1] release. This article describes the new system and its routing model, and provides some performance measurements.

IEEE 802.1 AVB and Its Application in Carrier-Grade Ethernet [Standards Topics]

Ethernet is increasingly being used in carrier networks to transport real-time traffic, including wireless backhaul network traffic, time-sensitive audio/video applications in access networks, and circuit emulation for legacy services. With the replacement of traditional circuit-switched networks with Ethernet-based packet networks, it must be ensured that the application timing and QoS requirements are met. The IEEE 802.1 Audio/Video Bridging Task Group is developing a comprehensive set of standards to enable high quality, low-latency streaming of time-sensitive applications. These standards specify a means of providing time synchronization (IEEE 802.IAS), a resource reservation protocol (IEEE 802.1Qat), and a set of forwarding and queuing rules that bound the variability of delay in an AVB network (IEEE 802.1Qav). These standards are described, including their potential application to carrier-grade Ethernet networks.

Proxy-based mobility management scheme in mobile content centric networking (CCN) environments

The increase of user generated mobile content raises the need of mobile content sharing. Moreover, content centric networking (CCN) is known for the new efficient network architecture appropriate for con tent s haring. However, it has little consideration for mobile devices. So, this p aper indicates that the proxy-based CCN scheme can provide low er communication overhead and shorter download time in mobile environments.

Content Centric Network-based Virtual Private Community

While the majority of Internet traffic is becoming of high quality multimedia variety, also mostly generated by consumers themselves, efficient content sharing with intuitive useability and security measure in a mobile environment remains an elusive goal. In this paper, we present a Content-Centric Networking (CCN) based Virtual Private Community (VPC) service which aims at supporting intuitive content sharing experience in a secure and distributed manner. VPC is a hierarchical and closed user group which consumers themselves can easily create and manage on their own devices. In VPC architecture, consumer content is shared by VPC-based content forwarding policy which is also based on hierarchical content naming. We prototyped the VPC architecture on the consumer devices to demonstrate the potential of user-oriented and distributed consumer network platform.

Adaptive flow control via Interest aggregation in CCN

In CCN (Content-Centric Networking), one request retrieves at most one data packet. Although the design intent of such rule is to maintain flow balance across the network, it may cause significant underutilization of Data downlink, especially in networks with asymmetric up/down link speed such as cellular networks. This paper describes an adaptive flow control mechanism where multiple Data messages per Interest are allowed in an adaptive manner without violating the operational principle of original CCN protocol. The performance of proposed scheme is demonstrated in an experimental testbed implementation built with CCNx open source code and its extension.

Mobility management for mobile consumer devices in content centric networking (CCN)

Due to rapid developments in mobile technology and various multimedia features like messaging, web, and camera, user created mobile content is on the increase and at the same time is shared in real-time. To keep pace with such movements, the new networking technology named content centric networking (CCN) has appeared. However, it does not take mobile consumer devices into consideration. So, this paper proposes a mobility management scheme for mobile consumer devices having content data in CCN environment to provide faster service access latency and lower routing overhead.

Time-based interest protocol for real-time content streaming in content-centric networking (CCN)

Internet increasingly suffers congestion on the server side, particularly due to ever-increasing demand for high-quality audio/video streaming. CCN is considered as an important networking paradigm which can efficiently address such traffic explosion issue. Although early implementation of CCN protocol is available through CCNx open source project, current version lacks efficient support for real-time streaming applications. In this paper, we propose an enhanced mechanism for the support of real-time content streaming service in CCN, and present experimental results demonstrating its effectiveness.

Named content sharing in Virtual Private Community

While the majority of Internet traffic is becoming high quality multimedia, efficient and secure content sharing with intuitive usability remains an elusive goal. In this demonstration, we present Virtual Private Community (VPC) service platform running on consumer devices such as smart phones, PCs and smart TVs in a distributed manner. It enables end-user consumers to create a hierarchical and closed user group community where they can easily and securely manage content sharing experience on their own devices. Our prototype implementation is based on CCN (Content-Centric Networking) technology to take advantage of its inherent networking efficiency and built-in security features.

CCN naming scheme for scalable routing and incremental deployment

In this paper, we propose a Content-Centric Networking (CCN) naming scheme which combines 16 bytes of Internet Protocol (IP) address with uniquely identified CCN name. The IP address is used to find destination of a packet, and CCN name is used to identify the content when the packet is forwarded. This approach enables for CCN protocol to use same Forwarding Information Base (FIB) of current internet, as a result it allows incremental deployment of CCN on current networking infrastructures.

CCN networking architecture for mobile applications

We have proposed a CCN-based Virtual Private Community (VPC) service for content sharing as a prototype for Content-Centric Networking (CCN). A VPC is a hierarchical and closed user group which consumers themselves can easily create and manage on their devices. CCN is a new networking paradigm that was considered to bring significant advantages over current IP-based Internet. Their main idea was based on named data networking not the named hosts. CCN is known to have advantages of reducing congestion and latency by eliminating redundant data delivery, ensuring secure data delivery by content protection, improving delivery efficiency by utilizing multiple paths over IP-based networking paradigm. In this paper, in addition to the well-known properties of CCN listed above, we show that CCN-based networking architecture fits with community grouping solution such as VPC. Then, we describe how the communities are formed and existing applications run with the CCN VPC. We have implemented our CCN VPC on Android platforms to demonstrate the potential of user device oriented CCN applications.