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This paper proposes an improved MM (Mobility Management) scheme for fast handover between WiMAX and WLAN networks. It simplifies re-authentication and IP configuration process and supports low handover latency by using general AAA key, MA ID (Mobility Agent Identifier). For this, the proposed scheme allocates MA ID to a MN during initial connection establishment. During handover, the MN requests access...
The capacity of downlink multiple-input multiple-output (MIMO) cellular network is significantly limited by inter-cell interference (ICI), especially at the cell boundary. In this paper, we propose an ICI cancellation employing a user selection algorithm associated with CoMP-CSB, which is more practically used for cellular networks. Under the partial channel state information (CSI) and no data sharing...
Recently, two types of coordinated multiple point transmission (CoMP) technologies - joint processing and transmission (JPT) and coordinated scheduling and beamforming(CSB) - have been proposed to the latest cellular communication standard named as a Network MIMO, to improve the performance of cell-edge users who suffer strong ICI. In this paper, we investigate an ICI cancelation employing a user...
We propose a method to support handover between heterogeneous access technologies for multiple interface (MIF) mobile node (MN) in the Proxy Mobile IPv6 (PMIPv6) domain. We analyze the reduction of handover signaling cost in the proposed MAT method.
In this paper, we propose seamless handover scheme between heterogeneous networks by using a method which determines best target access network which can support required QoS in case of insufficient resource status of specific access network.
All-in-one mobile device has some problems with CPU performance and throughput lower than fixing terminals, and there is limitation of power while it is advantage of portability, mobility by mobile terminal equipment. Also screen size of mobile devices is limited. The more it provides valuable mobile services, the more complex security policies they need. Therefore, it needs to develop of a framework,...
In previous work [1], we proposed a real-time MPEG-4 VBR video traffic prediction algorithm that calculates the probability density function (PDF) based on the last N frames, rWin, by using Cubic-spline interpolation method, and then utilize it for the prediction of next frame. We fixed the size of rWin as five in the algorithm. Although the algorithm is capable of providing more accurate prediction...
Real-time variable bit rate (VBR) video traffic generated from multimedia applications, such as MPEG-coded video, is expected to be large portions of the traffic in future wired/wireless networks. The nature of VBR traffic and its quality of service (QoS) constraints increase a number of challenges on network resource managements and operational utilizations. Thus, accurate traffic prediction based...
In this paper, we proposed a smart scheduling algorithm (S2A) for supporting multimedia traffic in IEEE 802.11e HCCA. Based on the accurate traffic prediction, S2A allocates transmission opportunity (TXOP) for each flow efficiently, and computes optimal service interval (SI). Preliminary evaluations showed that the predictions on the next VBR frame size and its expected arrival time at AP are very...
This paper presents a congestion control algorithm, which uses cross-layered approach and rate-based transmission, for IEEE 802.11 Wireless LANs (WLANs). The proposed algorithm considers the contention density which represents the degree of contention level experienced at a given station. From the contention density, each station can compute available bandwidth and adjusts its sending rate. The evaluation...
In this paper, we propose two application services using Open API considered BcN (broadband convergence network). First service is communication service for disabled person. It enables a person having a disability in communication means, such as visual, auditory or speech disabilities, to freely and efficiently communicate with other disabled persons and non-disabled persons for the exchange of thoughts...
In this paper, we present a novel congestion control algorithm (HRC), which uses hop-by-hop approach and rate-based transmission, for IEEE 802.11 multihop wireless networks. Since medium contention is most dominant cause of packet loss in multihop wireless networks, our algorithm considers the degree of medium contention level experienced at a given node for data rate control at the transport layer...
Recently, the fusion of communication and broadcasting surfaces streaming service such as IPTV with killer application of BcN(broadband convergence network). So, network operator is considering premium IP multicast for efficient network utilization. In this paper, premium IP multicast is called as transport service technology that transfer streaming service such as IPTV through integrated, controllable,...
In this paper, we propose a system and a method for providing contents using an open application program interface (API) by particularly to a system for providing contents that discloses the network resources to each user so that he/she can provide application services adequate to personal taste, the purpose of contents providing service. According to a system and method for providing contents using...
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