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IEEE Vehicular Technology Conference

作者： B. A. Hirantha Sithira Abeysekera Koichi Ishihara Yasuhiko Inoue Takeo Ichikawa Masato Mizoguchi NTT Network Innovation Laboratories NTT Corporation Yokosuka 239-0847 Japan

ISBN: (纸本)9781467363365

This paper proposes a master-slave channel selection scheme to improve fairness among cells in IEEE 802.11 wireless LANs. Each access point (AP) in our proposed scheme selects its operating channel in such a way that interference is minimized and the number of APs on each channel is balanced. Through numerous simulations and testbed experiments with UDP and TCP traffic flows, we show that the proposed scheme improves the minimum cell throughput and fairness among cells.

关键词： AP throughput fairness wireless local area network (WLAN) Throughput AP Cells channel selection Master-slave user datagram protocol/internet protocol Uridine Diphosphate Scheme

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All-IP Video Processing of SMPTE 2022-6 Streams on an All Programmable SoC

All-IP Video Processing of SMPTE 2022-6 Streams on an All Pr...

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SMPTE Technical Conference

作者： Matt Klein Thomas Edwards Xilinx 2100 Logic Drive San Jose CA 95124 FOX Network Engineering and Operations 10201 West Pico Blvd. Los Angeles CA 90035

ISBN: (纸本)9781629938370

Realizing the functions of routing, switching and video processing equipment while utilizing standard networking equipment for video transport provides an evolutionary step toward gaining the benefits of professional media networking in broadcast environments. This paper describes a fully networked broadcast platform based on the Xilinx Zynq-7000 All Programmable System on a Chip (SoC) that performs live video processing, similar to that of traditional broadcast equipment switchers and routers, but uses 10 GbE networking interfaces for uncompressed video transport. HD-SDI video only enters and exits a 10 GbE network through SMPTE 2022-6 bridges based on the Xilinx Kintex-7 FPGA. The demonstration platform is connected using a standard off-the-shelf 10 GbE switch showing the vision of a networked broadcast facility.

关键词： 100 GbE 10 GbE 1588 3G 400 GbE 40 GbE 4k 8k A9 ARP Bridge Broadcast facility Compression Control Cortex Cortex A9 Destination port Dual Cortex A9 DVB/ASI Effects Embedded processing Embedded processor Ethernet Ethernet switch FPGA FTP Gigabit Ethernet HD ICMP IGMP Integrated receiver decoder IEEE 1588 IP IRD JPEG JPEG 2000 L2 L3 Mix/effects Multicast Processor Programmable logic Router Routing matrix RS422 RTP SD SDI SMPTE2022-1 SMPTE2022-2 SMPTE2022-5 SMPTE2022-6 SoC Source port System on a Chip Transmission UDP UHDTV1 UHDTV2 Video routing matrix Video server Zynq JPEG system-on-chip Ethernet switch video servers internet Group Management protocol embedded processor Gigabit Ethernet file transfer protocol formycin triphosphate infantile Refsum disease Ethernet networks user datagram protocol/internet protocol Uridine Diphosphate PROCESSOR Field programmable gate arrays

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Enabling Multi-homed Femtocells Using SCTP

Enabling Multi-homed Femtocells Using SCTP

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IEEE International Conference on Communications Workshops

作者： John Fitzpatrick Frank A. Zdarsky Openet Network Laboratories NEC Europe Ltd.

ISBN: (纸本)9781467357517

This paper proposes modifications to the existing femtocell protocol stack to enable femtocells to be multi-homed and provide seamless flow mobility between available backhaul networks while improving bandwidth utilisation under high load conditions. The Stream Control Transmission protocol (SCTP) is proposed as a replacement to the existing tunnelling protocols (GTP-U or RTP over UDP) for communication between femto-cells and femtocell gateways. The paper describes how existing SCTP features can be used to provide the same functionality as both RTP and GTP-U over UDP. An analysis of the impact of the proposed modifications on overhead, bandwidth and delay is also performed.

关键词： Femtocell SCTP Multi-homing GTP Stream Control Transmission protocol Femtocells multi-homing GTP Guanosine Triphosphate user datagram protocol/internet protocol Uridine Diphosphate MORN4 gene

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Field Evaluation on Mobile WiMAX Network and Network Services in Azumino City

Field Evaluation on Mobile WiMAX Network and Network Service...

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IEEE Region 10 Conference (TENCON) - Sustainable Development through Humanitarian Technology

作者： Ota, Kenko Matsue, Hideaki Miyazawa, Satoru Nanamatsu, Satoshi Hirata, Yukihiro Hasui, Akio Yamazaki, Masahiro Namera, Takakazu Fukui, Hiroshi Harvey, Matthew Miyajima, Hajime Yazawa, Yoshiaki Miyasaka, Kohei Kainuma, Yoshihiro Tokyo Univ Sci Dept Elect Syst Engn 5000-1 Toyohira Chino Nagano 3910292 Japan Azumino City Nagano 3998101 Japan Commuture Corp SIA Toyosu Primesquare 9th F Koto Ku Tokyo 1358113 Japan Azumino Networks Community TV Nagano 3998303 Japan

ISBN: (纸本)9781467348232;9781467348225

This paper describes field evaluation results on a mobile WiMAX network and network services in Azumino city. An experimental mobile WiMAX network has been deployed in Azumino city so as to improve the sophistication of public services. Overview of the deployed network and field experimental results on both throughput in UDP (user datagram protocol) layer and received power are denoted in this paper. Following network services have been realized so as to provide safety and relief to local community on the deployed network: high speed internet access service, VoIP (Voice over IP) telephonic service, live camera system, life recording and management system and digital community wireless system for disaster prevention and safety confirmation. This paper shows field evaluation results on above-mentioned services and discusses the feasibility of providing safety and relief.

关键词： field evaluation WiMax relief Legal Services mobile networking High speed access Network city user datagram protocol/internet protocol disaster prevention received power Mobile Voice over internet protocol safety

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A comparative study of mixed traffic scenarios for different scheduling algorithms in WiMAX

A comparative study of mixed traffic scenarios for different...

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IEEE Vehicular Technology Conference

作者： Milad Alizadeh Rudzidatul Akmam Dziyauddin Dritan Kaleshi Angela Doufexi Centre of Communication Research Department of Electronics and Electrical Engineering University of Bristol UK

ISBN: (纸本)9781467309899

WiMAX promises an advanced framework to support Quality-of-Service (QoS) requirements of different types of applications and scheduling is a key part in its QoS provisioning. The scheduling algorithms used in this paper are based on our proposed Greedy-Latency scheduler, a modified form of Greedy algorithm which can guarantee delay requirements of real-time applications while optimising the system throughput. Our study of TCP performance in WiMAX shows that unlike UDP traffic, there are fluctuations in TCP throughput even for low traffic loads. It is seen that employing Automatic Repeat reQuest (ARQ) and setting the right TCP window size are crucial for a stable optimal TCP performance. WiMAX QoS mechanism can successfully maintain the inter-class priority between TCP traffic in Best Effort (BE) class and UDP in higher priority Real- Time Polling Service (rtPS) class. For intra-class scenarios, it is observed that TCP flows in general need a protection mechanism as the UDP traffic tend to seize the channel. The proposed Greedy-Scheduler can provide better intra-class protection for TCP flows due to its packet dropping policy.

关键词： IEEE 802.16 WiMAX QoS Scheduling TCP Greedy Packet Dropping WiMax Tritolyl Phosphates tactical command post Scheduling algorithms user datagram protocol/internet protocol Uridine Diphosphate protection mechanism Quality of service low traffic Mixed traffic greedy algorithm Window Size Automatic repeat request

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Performance Evaluation of Wireless Mesh Networks using IEEE 802.11s and IEEE 802.11n

Performance Evaluation of Wireless Mesh Networks using IEEE ...

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IEEE International Conference on Communications

作者： Tom Imboden Kemal Akkaya Zach Moore School of Inf. Sys. & App. Tech. Southern Illinois University Department of Computer Science Southern Illinois University School of Info. Sys. & App. Tech. Southern Illinois University

ISBN: (纸本)9781457720529

With the recent approval of IEEE 802.11n standard and progress on IEEE 802.11s mesh standardization efforts, performance evaluation of such standards has gained acceleration. In particular, several wireless testbeds have been created to form wireless mesh networks (WMNs) in order to test various aspects of these new standards. However, none of these considered multi-hop performance of WMNs when 802.11n based nodes are employed. While IEEE 802.11s is geared for implementing multi-hopping capability among the nodes, current studies still assume IEEE 802.11a/g based nodes. This paper presents a performance evaluation of WMNs using both 802.11s (in conjunction with 802.11a/g) and 802.11n on a real academic testbed. While a draft version of 802.11s has been used for creating a linear WMN using 802.11a/g based routers, the same linear WMN using 802.11n has been created using virtualized interfaces at the IP layer. Using such WMNs, throughput performance of TCP and UDP at both the 2.4 GHz and 5 GHz spectrums with different number of hops has been examined. The experiment results have shown that multi-hopping significantly degrades the expected performance of IEEE 802.11n.

关键词： Performance Evaluation INSTITUTE OF ELECTRICAL AND ELECTRONIC ENGINEERS Spread spectrum communication Wireless mesh networks user datagram protocol/internet protocol Uridine Diphosphate Humulus

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Widening the Scope of a Standard: Real Time Flows Tunneling, Compressing and Multiplexing

Widening the Scope of a Standard: Real Time Flows Tunneling,...

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IEEE International Conference on Communications

作者： Jose Saldana Dan Wing Julian Fernandez-Navajas Jose Ruiz-Mas Muthu A. M. Perumal Gonzalo Camarillo Communication Technologies Group (GTC) - Aragon Institute of Engineering Research (I3A) Dpt. IEC. Ada Byron Building. EINA University of Zaragoza Cisco Systems Ericsson Research

ISBN: (纸本)9781457720529

The use of the internet for delivering real-time traffic flows makes it necessary to fragment the information into small pieces, thus making the traffic have a bad efficiency. In order to avoid this, the IETF defined TCRTP as a mechanism capable of compressing headers and multiplexing a number of RTP packets into a bigger one, which was sent using a tunnel. However, some new applications that can be considered real-time, generate UDP or TCP packets, but do not use RTP. Based on some research results deployed in the academic context, a proposal for widening the scope of this standard is being developed in collaboration with the industry. Different traffics could be considered, and this would imply the possibility of utilizing a number of header compression algorithms, and also different multiplexing and tunneling protocols. This new standard could be used by different enterprises, as network operators, network equipment developers and game providers.

关键词： Multiplexing Header compression Real-time Tcrtp Standardization MULTIPLEXOR Outcomes Research Traffic IETF Widening COMPRESSED user datagram protocol/internet protocol Uridine Diphosphate Header Tunneling Rapid thermal processing

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System for real-time data acquisition and processing on a hail-fighter aeroplane

System for real-time data acquisition and processing on a ha...

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European DSP Education and Research Conference (EDERC)

作者： Andreas Bernhardt Martin Heigl Martin Versen Peter Viehhauser Peter Zentgraf Department of Engineering Sciences University of Applied Sciences Rosenheim Rosenheim Germany

ISBN: (纸本)9781467345965

The System HAILsens implements a device for Real-Time sensor data processing, running on a Texas Instruments Concerto M3 core. An I 2 C interface is used for sensor communications. Ethernet with UDP on a custom developed three layered frame organisation of sensor data serves as a link to the main system on board of an aeroplane. For backing up the acquired data, all frames are locally stored on an SD Card. To have the possibility of easily checking the current system status, an LCD module and a push-button provide a minimal user interface.

关键词： minimal user interface Minimal Interface Interfaces plane PUSH BUTTON Sensor Data Data Collection Methods Consumers user datagram protocol/internet protocol Uridine Diphosphate user Interface Device Component SD cards Customization EQUIPMENT I2C

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A New Mobile Spatial Information Service Grid Computing Model Based on Mobile Agent

A New Mobile Spatial Information Service Grid Computing Mode...

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WRI International Conference on Communications and Mobile Computing

作者： Tian Gen Li jin-fang Henan Polytech Univ Dept Geoinformat Jiaozuo 454003 Henan Peoples R China Guangdong Univ Technol Fac Electro Mech Engn Guangzhou 510090 Guangdong Peoples R China

ISBN: (纸本)9780769535012

A new mobile computing model of spatial information service is studied based on grid computing environment. Key technologies are presented in the model, including mobile agent (MA) mobile computing, grid computing, location based service (LBS) global positioning system (GPS), and wireless communication technologies, such as, general packet radio service (GPRS), transfer control protocol/internet protocol (TCP/IP), and user datagram protocol (UDP). In order to deal with the narrow bandwidth and instability of the wireless internet, distributed of organization of tremendous spatial data, limited processing speed and low memory of mobile devices, a new mobile agent based computing model of mobile spatial information service grid (MSISG) is further proposed that has good load balance, high processing efficiency, less network communication and thus suitable for mobile computing environment. A field test is carried out through this model, and the results show that the Proposed model is adaptable for mobile spatial information service.

关键词： Information Services Mobile agents wireless internet Grid computing Computational modeling Packet radio networks narrow bandwidth Load balancing user datagram protocol/internet protocol Mobile Computing PROCESSING SPEED field experimentation Wireless Communication Technique Mobile

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3TP: An application-layer protocol for streaming 3-D models

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IEEE TRANSACTIONS ON MULTIMEDIA 2005年第6期7卷 1149-1156页

作者： Alregib, G Altunbasak, Y Georgia Inst Technol Sch Elect & Comp Engn Savannah GA 31407 USA Georgia Inst Technol Sch Elect & Comp Engn Atlanta GA 30332 USA

This paper addresses the problem of streaming progressively compressed three-dimensional (3-D) models over lossy networks. Out of all encoded packets that can be transmitted, we intelligently choose a subset of packets to be transmitted using transport control protocol in order to meet a distortion constraint, while transmitting the remaining packets using user datagram protocol to minimize the end-to-end delay. We call this new application-layer protocol 3-D models transport protocol. We show the effectiveness of this protocol both experimentally and theoretically. We compare the performance of the proposed protocol with systems that do not optimize transmission according to the content of the encoded bitstream. When the maximum distortion is 30, measured using the Hausdorff distance, we achieve savings in delay time ranging from 39% to 68% for packet-loss rates between 1% and 19%.

关键词： encoding media streaming transport protocols 3D model streaming Hausdorff distance application-layer protocol encoded bitstream end-to-end delay transport control protocol user datagram protocol Packet media streaming application layer user datagram protocol/internet protocol Transmission control protocol End-to-end delay coding transport protocols

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