Eunjo Lee

IGMP extentions for mobile multimedia services

Mobile access networks are being developed to support various multimedia services such as IPTV (Internet Protocol Television), VoD (Video on Demand), and high speed internet services. Especially, these networks are a point-to-multipoint method in which one MAG (Mobile Access Gateway) and many MNs (Mobile Node) are connected. In other words, if a mobile multimedia viewer is joining a specific multicast group over mobile access networks, the others receive the multimedia program at the same time although they do not belong to the same multicast group. However, the traditional IGMP versions do not allow immediate multimedia program sharing as explained about. Also, in traditional IGMP versions, a viewer always needs to send IGMP join report. This paper proposes IGMP extensions which improves group join and leave process in mobile access networks for multimedia services.

Hybrid video-on-demand broadcasting using time-divided video data in cable

The harmonic broadcasting using time-divided video data method that is suggested in this paper first by receiving the data segments and merging the sub-segments in order. With this the occupied resource is reduced by 11%, and the processing load is cut down by 32%, which are the advantages of this process. Accordingly, the resource occupation and the processing load, which have been the factors behind the increasing prices for the receiving devices, can be improved and the design of more efficient receiving equipment would be possible.

Fast reconnection of adaptive HTTP streaming in heterogeneous networks

This paper proposes the time minimizing of disconnecting contents for adaptive HTTP streaming when a mobile device moves from previous network to current network. The proposing decision rule, IM, RMIM approach and maintenance, can determine the most suitable media segment with determined data rate from the media server. This paper also verifies the effect of reducing the measurement time by the decision rule through the simulation. As a result, the contents request method proposed takes less a disconnect time than the contents request method used in ISO/TEC FCD 23001-6. The contents request method used in ISO/IEC FCD 23001-6 takes 10 sec. The contents request method proposed in this paper, however, takes just 3 sec.

Cross-Layer Design of Internet Group Management Protocol for Mobile IPTV Services in WiMAX

Mobile WiMAX access network is being developed to support various multimedia services such as mobile Internet Protocol Television (IPTV), mobile Video-on-Demand (VoD), and mobile internet services. This mobile network is a shared radio medium which utilizes a point-to-multipoint method, where one base station (BS) can be connected to many mobile stations (MS). That is to say that a mobile IPTV viewer can join a specific multicast group over mobile WiMAX access network, while others, at the same time, are able to receive the same program channel, even though they do not belong to the same multicast group. This, however, is different from the traditional Internet Group Management Protocol (IGMP) version, used for IPTV services, in network layer which does not allow immediate program channel sharing. This is because the Connection ID (CID) is required before the Multicast Broadcast Service (MBS) can transmit its service flows in mobile WiMAX. Therefore, in this case, viewers always need to perform two processes before they are able to view the program channels, i.e. performing the IGMP join/leave at network layer and obtaining the CID at Medium Access Control (MAC) layer. This paper propose a new extended IGMP protocol which can be used in mobile WiMAX radio access network especially for mobile IPTV services to reduce the channel change time on the network.

Simple architecture and performandce efficient reverse fast staggered brodadcasting scheme for video-on-demand systems

Video-on-demand (VoD) service allows users to select and watch video and clip content over a network as part of an interactive television system. VoD services either ldquostreamrdquo content, allowing viewing in real time, or ldquodownloadrdquo it in which the program is brought in its entirety to a set-top box (STB) before viewing starts. In order to reduce the viewerpsilas waiting time for a large number of requests, an efficient NVoD approach for hot video is a broadcasting method that can theoretically serve an unlimited number of clients simultaneously within a bounded user delay by keeping the number of channels independent of the number of clients. However, previous proposed broadcasting architectures are required to manage a number of segments for a video, frequency of channel hopping and usage of many channels at the same time. To solve these problems, this paper proposes the reverse fast staggered broadcasting (RFSB) method. The RFBS substantially reduces complexity of VoD system and high bandwidth efficiency both viewerpsilas waiting time and clientpsilas buffer requirement.

Extended communication interface for remote vehicle diagnosis using Internet Protocol

Nowadays, vehicles have a lot of Electronic Control Unit (ECU). In order to check ECU software reprogramming and ECU assembly line inspection, international standards are developed. Among the standards the Diagnostic Communication over Internet Protocol (DoIP) is a typical protocol for remote diagnostic of vehicles which consists of International Standard Organization (ISO) 13400 parts. The DoIP just consider in-vehicle scenario where the communication range is a Local Area Network (LAN). In this paper, we propose a new communication interface extends the communication range to Wide Area Network (WAN) to implement remote vehicle diagnosis. The simulation results show that the CPU Utilization Threshold Area (CUTA) is between -20.70266 and 20.70266 which implies remote vehicle diagnosis is possible from the long distance site.

Coexisting V2G PLC between G3 and HomePlug GP using Dual PHY

Broad-Band PLC like as HomePlug Green PHY (GP) and the other Narrow-Band PLC like as G3 are candidates of V2G PLC standard. These PLC candidates are different bandwidth, so they cannot coexist at the same network. Therefore, it is needed to support coexistence technology for PLC. In this paper we propose “G3-GP Dual PHY” which can be used with different bandwidth G3 and HomePlug GP (HPGP). G3 and HPGP, each representative charging method of different bandwidth, can coexist in a single EVSE using G3-GP Dual PHY.

Downstream Multicast forwarding for contents sharing in DOCSIS

This paper proposes a method of multicast session management, input packet classification and multicast contents sharing sequence for multicast contents sharing in Data Over Cable Service Interface Specification (DOCSIS) over Hybrid Fiber Coaxial (HFC) network. The proposed Multicast contents sharing algorithm enables service flows to be classified in the input data streams. And then, it also enables the classified flows to be transmitted with minimizing downstream replication to groups including subscribers who requested those flows. This system with the proposed algorithm enables linear broadcasting using IP multicast, Video on Demand (VOD) services to be efficiently transmitted without downstream replication.

iCloudMedia: A Business Model for Cloud-Based Interactive Multimedia Services

The Pay-TV markets are undergoing rapid change. As companies increasingly look for resources efficiencies, cloud computing is seen making waves in the Pay-TV markets. This hugely popular technology will revolutionized how multimedia content is being delivered. Why? We are in dire needs to integrate web, social, mobile and on-demand TV together as interactive content, and deliver them to any television set as a single service. We have seen some companies offering these services and have been rather successful. What they still lack is to provide some form of flexibility in resource(s) provision and content management, especially to subscriber(s). Currently, the resources are allocated based on availabilities and service agreements, while content is managed using on-the-top program guide tightly controlled by the service operator. This paper introduces a new framework, named iCloudMedia. The iCloudMedia describes a cloud-based framework that allows “push” on-the-fly changes and “pulls” rich personalized multimedia content simultaneously in an interactive resource(s) market. We strongly believe that innovative content branding and configurable resource management through easy-to-manage and flexible user interface is the next logical step for service operators.

An extended PIM-SM for efficient data transmission in IPTV services

IPTV is defined as multimedia services delivered over IP based networks. This can be performed using the PIM-SM multicast routing architecture which enable IP multicast routing on existing IP networks. The RP is required for network running PIM-SM, and the RP location changes the efficiency of multicast data packets. In general, the PIM-SM is consisted of a shared tree for keep-alive packets and a source-based tree for sending out large data. Therefore, the RP utilization is very high when the access network uses PIM-SM. And PIM-SM protocol cannot be applied in different architectures with access networks such as PON, HFC. In this paper, we propose a new PIM-SM protocol which reduces processes of traditional PIM-SM protocol in IPTV services. The proposed a new PIM-SM protocol can reduce the number of processes for RPT configuration and can deliver multicast data packets immediately through the SPT. Therefore, the RP utilization in extended PIM-SM improves than traditional PIM-SM.