Kenichi Kashibuchi's research while affiliated with Tohoku University and other places
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Publications (9)
Multimedia streaming services are becoming popular in both wired and wireless networks. Layered multicast is a widely accepted approach for streaming multimedia data to a large number of users. Existing layered multicast approaches donot interact well with network dynamics. Indeed, upon a change in network conditions, they require a long time till...
In the IEEE 802.11 distributed coordination function (DCF), the basic service set (BSS) suffers from two unfairness issues: 1) performance anomaly and 2) uplink/downlink unfairness. In this paper, to solve these issues, we propose a window control scheme in the Transmission Control Protocol (TCP) for the IEEE 802.11 DCF mode. The proposed scheme is...
In IEEE 802.11 Distributed Coordination Function (DCF), the multi-rate Basic Service Set (BSS) suffers from the performance anomaly issue, which brings unfairness in terms of channel occupancy time. To solve the issue, this paper presents a rate control scheme for TCP Friendly Rate Control (TFRC) in IEEE 802.11 DCF mode. The proposed scheme control...
In Low Earth Orbit (LEO) satellite networks, the user distributions are unbalanced due to the geography and the population dispersion. As a result, some satellites have few traffic loads, while others have heavy traffic loads which often lead to congestion events. In this paper, we propose a novel load balancing method based on congestion predictio...
Recent trends in the telecommunication industry have been moving toward the development of ubiquitous information systems, where the provision of a plethora of advanced multimedia services should be possible, regardless of time and space limitations. An efficient and seamless delivery of multimedia services over various types of wireless networks i...
In multi-rate IEEE 802.11 wireless LAN, when multiple stations transmit frames at different data rates, the basic service set (BSS) suffers from "performance anomaly" problem. In this paper, to solve this issue, we propose a TCP rate control scheme for IEEE 802.11 DCF mode. In the proposed scheme, a TCP sender controls its maximum window size based...
This paper presents a new TCP window size adjustment scheme for the automatic rate fallback (ARF) algorithm. The proposed scheme utilizes the information about radio usage monitored on the IEEE 802.11 MAC layer. Each station calculates the maximum available window size on each long-lived connection based on these information when the data transmiss...
In the near future, RTP/RTCP-based multimedia streaming will become the norm not only in wired networks but also in mobile environments. Presently when a handoff occurs between heterogeneous networks (with different available bandwidths), a RTP sender cannot stream media at a suitable rate over the new network. Furthermore, RTCP fails to precisely...
In mobile environments, the fundamental challenge upon a handoff phenomenon consists in an efficient probing of the availability of the new network resources and an appropriate rate adjustment in the new network cell. This paper proposes the usage of low-priority dummy packets to probe the availability of the new network resources. Indeed, when a m...
Citations
... To achieve a stable system, the client should detect the short term bandwidth variations and accordingly avoid frequent short-term bitrate switches [12], [13]. The efficiency means that the client should watch the highest possible quality with respect to its available throughput [14]. Also, the system must ensure fairness among the connected clients. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/276973940166665-1443047141794_Q64/Tarik-Taleb.jpg)
... In the remainder of this section, we explain how the proposed scheme can be applied in mobile networks. This application is similar in spirit to the idea presented in [14] [15]. Fig. 4 ...
... A discrete-time Markov model for the performance analysis of the Enhanced Distributed Channel Access (EDCA) function of the IEEE 802.11e standard with EDCA parameters including CW min , TXOP, and AIFS is presented in [28]. The references [29], [30], and [31] offer crosslayer solutions that adjust the sending rates of the stations at the transport or application layers. ...
... In [11], Choi et al. present a protocol interaction between DCF, ARF, and TCP in multi-rate IEEE 802.11 wireless LANs based on Markov chain analysis. In [12], the authors proposed a TCP window size adjustment scheme for the ARF algorithm. However, we found that the proposed scheme often cannot work well with many stations in a BSS. ...
... The nature of the proposed cross-layer structure to changing system conditions is comparatively avowed. The outcomes are promising for spilling sight and sound associations in heterogeneous remote structures where the uniqueness in the accessible data move limit is up to this point a significant issue to deal with [26]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272685158629389-1442024616819_Q64/Sergio-Palazzo.jpg)
... Because of multiple standard DCF processes operating in each node, it will result in a high collision rate. Besides, some cross-layer solutions [31,32] also are proposed that involves both MAC and transport layers. But they are often inadequately and too complicated for implementation. ...
... Authors have concluded that, lower values of contention window for nodes having higher SNR considerably reduces the effect of MAC anomaly. In [12] an anomaly mitigation scheme for TCP friendly rate control (TFRC) protocol is presented. We named this approach as channel occupancy time based anomaly mitigation (COTAM). ...
... The satellites seek out the congestion areas and share the information of their position to predict congestion. According to [12], when the satellite detects a congestion area, its current coordinate is stored as the information of the congested area. ...
... In the remainder of this section, we explain how the proposed scheme can be applied in mobile networks. This application is similar in spirit to the idea presented in [14] [15]. Fig. 4 [P] [P] ...
