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This paper studies an effect of utilization of Multi-Path TCP (MPTCP) on QoE for Web services. The authors consider the Web usability as QoE and assess it by experiments with subjects; they compare the results of MPTCP with those of TCP. The experimental results show the followings. Indeed the utilization of MPTCP can provide higher QoS of the target Webservices than that of TCP, but it does not always...
This paper evaluates throughput characteristics of a multi-hop network, where a relay node itself has own traffic as well as relays transit traffic. In addition, it also has an individual per-flow scheduling such as weighted round-robin scheme to send transit and own data farther. The best route is determined in terms of various QoS criteria such as total throughput and relay node throughput. Novelty...
Variable block size motion estimation (VBSME) is a video coding technique which improves video distortion, provides more accurate predictions, reduces video coding data, and increases the utilization of network bandwidth. This paper presents a high-performance VLSI architecture for VBSME which can be applied to the full search block matching algorithm. Our proposed architecture uses pipelined designs...
High-speed hardware for Keccak, which was selected as a new standard hash function named SHA-3, was developed and its performance was evaluated against SHA-1 and −2 circuits through the use of various FPGA platforms. The results showed that Keccak is suitable for high-speed hardware implementations, but it is getting harder to implement on new FPGA devices, due to the current trends in architecture...
Extending battery life for smartphones while using wireless networks is important. In this paper, we propose Comfort Route for Energy Saving (CRFES), which helps users extend the battery life of their smartphones by navigating to their destinations via Quality of Service (QoS)-compliant energy-efficient spots such as Wi-Fi spots. To create CRFES, we construct maps of Wi-Fi spots using logging software...
Device-to-Device communication allows two cellular devices to communicate with each other without a base station. By relieving the base station from relaying data to and from different devices, D2D communication aims at increasing the system capacity. In a D2D enabled network, one of the critical issues is to effectively allocate frequency resource. In this paper, a resource allocation scheme has...
This paper investigates Quality of Service (QoS) of personal mobile wireless LANs (m-WLANs). QoS characteristics in densely located WLAN are found to be significantly different from that in traditional WLANs. The channel assignment method is proposed and evaluated by using real devices to accurately evaluate the interferences for the total throughput of the densely located m-WLANs.
In this work, we propose a thermal-aware DRAM architecture and mapping for the multiple-channel three-dimensional DRAM system. A thermal-aware DRAM architecture with dual control and precharge circuits (Dual-CP) is proposed to avoid the accumulated temperature by the stacking of the control and precharge circuits. A thermal-aware bank remapping (BRMAP) is proposed to avoid the active banks in the...
In home networks, a variety of smart devices are connected to a WiFi access point (AP) and the oversized buffer of the AP causes high latency/delay jitter and reduced network throughput (known as the bufferbloat problem). To mitigate this problem, appropriate active queue management (AQM) algorithms should be implemented at the AP. In this paper, we conduct extensive simulation study on the performance...
With the increasing demand for video streaming in mobile environment, we have been tackling a research on throughput prediction based on the measurement history data in order to improve service quality[1][2]. Since throughput fluctuation occurs sharply in mobile environment, useless packet loss or congestion occurs when available network bandwidth is insufficient compared to the bit rate of video...
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