Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4494149
Kwang-Suh Jung, Y. Park, Joong Kyu Kim, Hyun Lee, K. Yun, N. Hur, Jinwoong Kim
In this paper, we introduce a 2D/3D mixed service in terrestrial digital multimedia broadcasting (T-DMB) system using depth-image-based rendering (DIBR). The 2D/3D mixed service is the 3D service type that 3D contents are shown partially while a 2D video sequence is displayed in the entire screen, or vice versa. This service is very attractive because partial display of 3D contents can maximize the effect of 3D services and can reduce the viewer's fatigue while watching a 3D display. Especially, we can provide more flexible 3D services with a low amount of data by using DIBR. Moreover, 3D contents can be manipulated efficiently by XML-based metadata. The proposed 2D/3D mixed service is tested using various contents in the 3D display with parallax barrier. The proposed 2D/3D mixed service can be employed efficiently as the additional data services in conventional T-DMB structure.
{"title":"2D/3D Mixed Service in T-DMB System Using Depth Image Based Rendering","authors":"Kwang-Suh Jung, Y. Park, Joong Kyu Kim, Hyun Lee, K. Yun, N. Hur, Jinwoong Kim","doi":"10.1109/ICACT.2008.4494149","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4494149","url":null,"abstract":"In this paper, we introduce a 2D/3D mixed service in terrestrial digital multimedia broadcasting (T-DMB) system using depth-image-based rendering (DIBR). The 2D/3D mixed service is the 3D service type that 3D contents are shown partially while a 2D video sequence is displayed in the entire screen, or vice versa. This service is very attractive because partial display of 3D contents can maximize the effect of 3D services and can reduce the viewer's fatigue while watching a 3D display. Especially, we can provide more flexible 3D services with a low amount of data by using DIBR. Moreover, 3D contents can be manipulated efficiently by XML-based metadata. The proposed 2D/3D mixed service is tested using various contents in the 3D display with parallax barrier. The proposed 2D/3D mixed service can be employed efficiently as the additional data services in conventional T-DMB structure.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131337317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493871
Hyung-sub Kim, Jae-su Song, Y. Shin
CDMA systems, interference is one of very important criteria to evaluate system performance. Interference is classified into inter-cell and intra-cell interference. While the intra-cell interference is generated by mobiles sharing the same base station, inter-cell interference is generated by the mobiles connected to different base stations. Many inter-cell interference mitigation schemes have been proposed to improve system performance. Most of them focus only on the downlink transmission. As for the downlink transmission, only one mobile is allowed to receive data from the base station at a moment except the broadcast service. However, as for the uplink transmission, multiple mobiles may have access to the base station simultaneously. The uplink inter-cell interference management is, therefore more difficult and important than the downlink. In this paper, we propose the inter-cell interference coordination scheme for uplink non-real-time transmission. This scheme shuts down a cell that injects lots of interference. The design of this scheme is based on the assumption that each base station applies the proportional fairness (PF) algorithm to the scheduling of uplink packets. The simulation results show that we can achieve improved system throughput by applying the proposed scheme.
{"title":"Inter-cell Interference Coordination for Uplink Non-real-time Data in CDMA Systems","authors":"Hyung-sub Kim, Jae-su Song, Y. Shin","doi":"10.1109/ICACT.2008.4493871","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493871","url":null,"abstract":"CDMA systems, interference is one of very important criteria to evaluate system performance. Interference is classified into inter-cell and intra-cell interference. While the intra-cell interference is generated by mobiles sharing the same base station, inter-cell interference is generated by the mobiles connected to different base stations. Many inter-cell interference mitigation schemes have been proposed to improve system performance. Most of them focus only on the downlink transmission. As for the downlink transmission, only one mobile is allowed to receive data from the base station at a moment except the broadcast service. However, as for the uplink transmission, multiple mobiles may have access to the base station simultaneously. The uplink inter-cell interference management is, therefore more difficult and important than the downlink. In this paper, we propose the inter-cell interference coordination scheme for uplink non-real-time transmission. This scheme shuts down a cell that injects lots of interference. The design of this scheme is based on the assumption that each base station applies the proportional fairness (PF) algorithm to the scheduling of uplink packets. The simulation results show that we can achieve improved system throughput by applying the proposed scheme.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"29 24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131427175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493929
Nithiapidary Muthuvelu, Ian Chai, C. Eswaran
An unorganized deployment of grid applications with a large amount of fine-grain jobs would let the communication overhead dominate the overall processing time, resulting in a low computation-communication ratio. Grid's dynamic nature complicates the planning of the job scheduling activity for minimizing the application processing time. This paper presents a grid job scheduling algorithm, based on a parameterized job grouping strategy, which is adaptive to the runtime grid environment. Jobs are grouped based on the job processing requirements, resource policies, network conditions and user's QoS requirements. Simulations using the GridSim toolkit reveal that the algorithm reduces the overall application processing time significantly.
{"title":"An Adaptive And Parameterized Job Grouping Algorithm For Scheduling Grid Jobs","authors":"Nithiapidary Muthuvelu, Ian Chai, C. Eswaran","doi":"10.1109/ICACT.2008.4493929","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493929","url":null,"abstract":"An unorganized deployment of grid applications with a large amount of fine-grain jobs would let the communication overhead dominate the overall processing time, resulting in a low computation-communication ratio. Grid's dynamic nature complicates the planning of the job scheduling activity for minimizing the application processing time. This paper presents a grid job scheduling algorithm, based on a parameterized job grouping strategy, which is adaptive to the runtime grid environment. Jobs are grouped based on the job processing requirements, resource policies, network conditions and user's QoS requirements. Simulations using the GridSim toolkit reveal that the algorithm reduces the overall application processing time significantly.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132299714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493914
E. Paik, Hanlim Kim, S. Heo, Jongsam Jin, Seong-Choon Lee, S. H. Lee
This paper proposes the architecture of the mobile access point (AP) for vehicular WiBro (Wireless Broadband) Networks and describes the development result. The proposed mobile AP organizes a moving network inside a vehicle for passengers and devices to access Internet while the vehicle moves. The mobile AP implements following properties: Network Mobility (NEMO), IPv6 over WiBro, and Multihoming. NEMO enables the mobile WiBro AP to aggregate mobility management of the devices inside the vehicle. The NEMO Basic Support protocol is based on the Mobile IPv6 protocol to support vast address space for a lot of devices inside a vehicle. Therefore we also implemented the technology which adapts IPv6 over WiBro to enable IPv6 network mobility protocol to operate over WiBro. In addition, multihoming is deployed to provide connection to multiple access networks. The development result shows that the devices behind the mobile AP maintain the Internet connectivity while the mobility of the vehicle is transparent to them. We verified our development by an experiment of real-time streaming performance over networked camera and PCs behind the mobile AP. It shows the feasibility of the proposed architecture that passengers and devices in moving space, e.g., vehicles, are able to communicate over WiBro without managing mobility as if they connect to the Internet at stationary place, e.g., home or office.
本文提出了车载WiBro(无线宽带)网络移动接入点(AP)的体系结构，并描述了其开发成果。所提出的移动AP在车内组织移动网络，使乘客和设备在车辆移动时访问互联网。移动AP实现了NEMO (Network Mobility)、IPv6 over WiBro、Multihoming等特性。NEMO使移动WiBro AP能够聚合车辆内设备的移动性管理。NEMO基本支持协议基于移动IPv6协议，以支持车辆内许多设备的大量地址空间。因此，我们还实现了在WiBro上适配IPv6的技术，使IPv6网络移动协议能够在WiBro上运行。此外，部署多宿主以提供到多接入网的连接。开发结果显示，移动AP背后的设备保持了互联网连接，而车辆的移动性对它们来说是透明的。我们通过移动AP后面的网络摄像头和pc上的实时流媒体性能实验验证了我们的开发。它显示了所提议架构的可行性，即移动空间中的乘客和设备(例如车辆)能够通过WiBro进行通信，而无需管理移动性，就像他们在固定地点(例如家庭或办公室)连接到互联网一样。
{"title":"Development of Mobile Access Point for Vehicular WiBro Networks","authors":"E. Paik, Hanlim Kim, S. Heo, Jongsam Jin, Seong-Choon Lee, S. H. Lee","doi":"10.1109/ICACT.2008.4493914","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493914","url":null,"abstract":"This paper proposes the architecture of the mobile access point (AP) for vehicular WiBro (Wireless Broadband) Networks and describes the development result. The proposed mobile AP organizes a moving network inside a vehicle for passengers and devices to access Internet while the vehicle moves. The mobile AP implements following properties: Network Mobility (NEMO), IPv6 over WiBro, and Multihoming. NEMO enables the mobile WiBro AP to aggregate mobility management of the devices inside the vehicle. The NEMO Basic Support protocol is based on the Mobile IPv6 protocol to support vast address space for a lot of devices inside a vehicle. Therefore we also implemented the technology which adapts IPv6 over WiBro to enable IPv6 network mobility protocol to operate over WiBro. In addition, multihoming is deployed to provide connection to multiple access networks. The development result shows that the devices behind the mobile AP maintain the Internet connectivity while the mobility of the vehicle is transparent to them. We verified our development by an experiment of real-time streaming performance over networked camera and PCs behind the mobile AP. It shows the feasibility of the proposed architecture that passengers and devices in moving space, e.g., vehicles, are able to communicate over WiBro without managing mobility as if they connect to the Internet at stationary place, e.g., home or office.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132535234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493950
Seung-Que Lee, N. Park
The WiBro (wireless broadband) system is designed to be able to provide a variety of information and multimedia contents services through high speed wireless Internet access via various user terminals such as PC, PDA and hand-held PC. The WiBro system can be considered as a system that integrates services in wired-realm and a wireless service. The WiBro system consists of three major entities; WiBro-AT(Access terminal), WiBro-AP(Access Point) and PAR(Packet Access Router). WiBro-AT provides interface with users of WiBro service, it is the most important factor for successful launching and fast expansion of commercial WiBro service. In this paper, we present an execution model of MAC on system kernel for uplink packet transmission of WiBro Access Terminal. It uses tasklet and kernel thread for a data processing an it also uses circular queue for delayed function call of queue operation. It gives stable running of WiBro-AT in spite of non-atomic execution property of tasklet.
{"title":"An Execution Model of MAC on System Kernel for WiBro Access Terminal","authors":"Seung-Que Lee, N. Park","doi":"10.1109/ICACT.2008.4493950","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493950","url":null,"abstract":"The WiBro (wireless broadband) system is designed to be able to provide a variety of information and multimedia contents services through high speed wireless Internet access via various user terminals such as PC, PDA and hand-held PC. The WiBro system can be considered as a system that integrates services in wired-realm and a wireless service. The WiBro system consists of three major entities; WiBro-AT(Access terminal), WiBro-AP(Access Point) and PAR(Packet Access Router). WiBro-AT provides interface with users of WiBro service, it is the most important factor for successful launching and fast expansion of commercial WiBro service. In this paper, we present an execution model of MAC on system kernel for uplink packet transmission of WiBro Access Terminal. It uses tasklet and kernel thread for a data processing an it also uses circular queue for delayed function call of queue operation. It gives stable running of WiBro-AT in spite of non-atomic execution property of tasklet.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129972342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493923
Hyun Ahn, Kwanghoon Pio Kim
RFID systems based on the EPCglobal architecture make use of the data exchange and management technologies such as the Database or the Data Warehouse. However, there is a problem that they don't have close connections between EPCs and business services, because of disconnection between the data-saving time, time that RFID core systems store their connected data-repository with EPC- related data, and the data-consuming time, time that legacies in enterprise consume the data. Thus, current many companies and organizations utilizing RFID technology don't realize the Real-Time Enterprise yet. We need methods, which can immediately execute business processes, so that the RFID core is operated as not only EPC data collector but also business event generator. This paper defines and describes a service-transaction for real-time integration between RFID and BPM which provide the automation of business processes and integration of task applications.
{"title":"Design of Interoperability for Real-Time Integration of RFID and BPM","authors":"Hyun Ahn, Kwanghoon Pio Kim","doi":"10.1109/ICACT.2008.4493923","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493923","url":null,"abstract":"RFID systems based on the EPCglobal architecture make use of the data exchange and management technologies such as the Database or the Data Warehouse. However, there is a problem that they don't have close connections between EPCs and business services, because of disconnection between the data-saving time, time that RFID core systems store their connected data-repository with EPC- related data, and the data-consuming time, time that legacies in enterprise consume the data. Thus, current many companies and organizations utilizing RFID technology don't realize the Real-Time Enterprise yet. We need methods, which can immediately execute business processes, so that the RFID core is operated as not only EPC data collector but also business event generator. This paper defines and describes a service-transaction for real-time integration between RFID and BPM which provide the automation of business processes and integration of task applications.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134012518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4493739
Soobin Lee, Jae Y. Lee, Hwang S. Lee
In mobile communication systems, users move with various speeds. Therefore, pilot designs using the fixed arrangement of pilot subcarriers and channel estimation method are not suitable. In this paper, we propose a group-based pilot design method in mobile orthogonal frequency division multiple access (OFDMA) systems. In the proposed method, we divide users into several groups based on the users' speeds and allocate an appropriate pilot arrangement for each group. Using the proposed method, we minimize the channel estimation errors of high-speed users while maximizing the resource efficiency of low-speed users.
{"title":"Group-based Pilot Design Method in Mobile OFDMA Systems","authors":"Soobin Lee, Jae Y. Lee, Hwang S. Lee","doi":"10.1109/ICACT.2008.4493739","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4493739","url":null,"abstract":"In mobile communication systems, users move with various speeds. Therefore, pilot designs using the fixed arrangement of pilot subcarriers and channel estimation method are not suitable. In this paper, we propose a group-based pilot design method in mobile orthogonal frequency division multiple access (OFDMA) systems. In the proposed method, we divide users into several groups based on the users' speeds and allocate an appropriate pilot arrangement for each group. Using the proposed method, we minimize the channel estimation errors of high-speed users while maximizing the resource efficiency of low-speed users.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"533 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131566460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4494059
Longyang Huang, Bin Shen, Mengxing Li, Zemin Liu
An efficient subband adaptive beamformer with perfect reconstruction general parameter filter banks (GPFB) for wideband array antenna is proposed in this paper, which is used to enhance performance of suppressing the interference and accelerate convergence speed of weights. Instead of the conventional FFT filter banks, GPFB are utilized to partition the frequency band into several subbands without aliasing between them. With subbands running at downsampling and in manner of parallel, the loads of computational processing costs, compared with traditional fullband methods, can be alleviated. Deep suppression of the interference and convergence speed of weights are also improved.
{"title":"An Efficient Subband Method for Wideband Adaptive Beamforming","authors":"Longyang Huang, Bin Shen, Mengxing Li, Zemin Liu","doi":"10.1109/ICACT.2008.4494059","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4494059","url":null,"abstract":"An efficient subband adaptive beamformer with perfect reconstruction general parameter filter banks (GPFB) for wideband array antenna is proposed in this paper, which is used to enhance performance of suppressing the interference and accelerate convergence speed of weights. Instead of the conventional FFT filter banks, GPFB are utilized to partition the frequency band into several subbands without aliasing between them. With subbands running at downsampling and in manner of parallel, the loads of computational processing costs, compared with traditional fullband methods, can be alleviated. Deep suppression of the interference and convergence speed of weights are also improved.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132802911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4494223
W.V. Wathsala, B. Siddhisena, A.S. Athukorale
Proxy servers currently play an important role in a network by making efficient use of bandwidth through caching. In this paper we discuss on broadening the concept of proxy and Internet cache to suit current and future Web 2.0 and Web X.0 trends, especially in the areas of audio, video, blogging, social networking and mesh computing technologies. In doing so, we present ideas of a next generation caching server implemented as a platform for developing Web service oriented applications and share the knowledge and experience gained in deploying a prototype at the University Network we work in.
{"title":"Next Generation Proxy Servers","authors":"W.V. Wathsala, B. Siddhisena, A.S. Athukorale","doi":"10.1109/ICACT.2008.4494223","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4494223","url":null,"abstract":"Proxy servers currently play an important role in a network by making efficient use of bandwidth through caching. In this paper we discuss on broadening the concept of proxy and Internet cache to suit current and future Web 2.0 and Web X.0 trends, especially in the areas of audio, video, blogging, social networking and mesh computing technologies. In doing so, we present ideas of a next generation caching server implemented as a platform for developing Web service oriented applications and share the knowledge and experience gained in deploying a prototype at the University Network we work in.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117317748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-04-22DOI: 10.1109/ICACT.2008.4494065
Yohan Kim, Jitae Shin, ChangGuk Choi
Video telephony is a representative service in 3G mobile network. There have been many efforts to improve quality of video telephony service in different fields. In Korea, leading mobile service providers, SKTelecom and KTF service the WCDMA network and more than four million people are using it. This paper proposes an error minimizing algorithm using cross-layer adaptation between physical layer and video codec for the video telephony over WCDMA network. We simulated 3G-324M protocol with MPEG4 video codec, and simulation results show suggested algorithm improve packet transmission rate for improving quality of video telephony service.
{"title":"A Cross-Layer Transmission on Video telephony over WCDMA Network","authors":"Yohan Kim, Jitae Shin, ChangGuk Choi","doi":"10.1109/ICACT.2008.4494065","DOIUrl":"https://doi.org/10.1109/ICACT.2008.4494065","url":null,"abstract":"Video telephony is a representative service in 3G mobile network. There have been many efforts to improve quality of video telephony service in different fields. In Korea, leading mobile service providers, SKTelecom and KTF service the WCDMA network and more than four million people are using it. This paper proposes an error minimizing algorithm using cross-layer adaptation between physical layer and video codec for the video telephony over WCDMA network. We simulated 3G-324M protocol with MPEG4 video codec, and simulation results show suggested algorithm improve packet transmission rate for improving quality of video telephony service.","PeriodicalId":448615,"journal":{"name":"2008 10th International Conference on Advanced Communication Technology","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133559232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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