• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.321_322
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• 2009

최근 전력선 통신이 홈 네트워킹의 새로운 기술로 주목을 받고 있어 관련 수요가 증가하고 있다. 안정적인 통신을 위하여 일정한 QoS(Quality of Service)의 제공은 매우 중요하다. 본 논문에서는 outage 확률 분석을 위하여 시뮬레이션을 이용한 옥내 전력선 통신 환경에 대한 채널 응답과 채널 용량을 계산하였다. 계산된 채널 응답과 채널 용량을 바탕으로 전송 신호의 파워에 따른 outage 확률을 분석을 하였다. 시뮬레이션 분석 결과 아주 높은 수준과 아주 낮은 수준의 QoS 환경에서 전송 신호의 파워는 outage 확률에 영향을 미치지 않았다. 하지만, 30% ~ 50% outage를 허용하는 QoS 환경에서는 전송 신호의 파워에 따라서 outage 확률이 상대적으로 크게 변화하였다. 따라서 본 논문에서는 outage 확률측면에서 전송 신호의 파워를 효율적으로 이용할 수 있는 방향을 제시한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.4
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• pp.611-616
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• 2021

This paper investigates the improved outage probability of correlated superposition coding(CSC)/non-successive interference cancellation(SIC) non-orthogonal multiple access(NOMA) scheme. For this, first, we calculate the outage probability of the conventional independent superposition coding(ISC)/SIC NOMA scheme. Then, simulations demonstrate that the outage probability of CSC/non-SIC NOMA improves greatly, with respect to that of conventional ISC/SIC NOMA. As a result, CSC/non-SIC NOMA schemes could be a promising technique in 5G networks, especially with such improved outage probability.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.2
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• pp.187-194
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• 2014

In this paper, we analyze the outage probability of macro diversity combining in cellular networks in consideration of aggregate interference from other mobile stations (MSs). Different from existing works analyzing the outage probability of macro diversity combining, we focus on a diversity gain attained by selecting a base station (BS) subject to relatively low aggregate interference. In our model, MSs are randomly located according to a Poisson point process. The outage probability is analyzed by approximating the multivariate distribution of aggregate interferences on multiple BSs by a multivariate lognormal distribution.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.449-450
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• 2011

본 논문에서는 실제 옥내 전력선 통신 네트워크를 기반으로 다중 사용자 환경에서의 outage probability의 변화를 확인하였다. 2명의 사용자를 가정하고 시뮬레이션을 통하여 outage probability의 변화를 확인해 본 결과 거리에 따라 최대 70% outage 확률의 변화를 확인하였다. 또한 수신부의 위치에 따라서 outage 확률이 4% 이상 차이가 난다는 것을 확인하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.6B
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• pp.464-473
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• 2012

In this paper, we derive the gain of network coding when it is utilized for retransmission in wireless networks. To the end, we derive the outage probability of the network-coded transmission and express the diversity order as a function of the number of nodes and the node's listening probability. From the outage probability, we formulate the ${\epsilon}$-outage capacity. The network-coding gain is the ratio of the ${\epsilon}$-outage capacities between network-coded and non-coded transmissions. Under our system model, we find that the network-coding gain is a function of the diversity order. Moreover, when there are infinitely many nodes, we show that the network coding gain approaches $0.25{\epsilon}^{-1}$.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.536-538
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• 2022

Since the invention of a novel diversity technique, namely a space-time line code (STLC), though the previous studies have theoretically analyzed the error rate and ergodic capacity, the outage probability has not been revealed yet. In this paper, we characterize the probability density function of the instantaneous signal-to-noise ratio, and mathematically derive the closed-form expression of the outage probability. Based on numerical simulations, furthermore, we validate the accuracy of the mathematical analysis, and present the insight into the system design and implementation.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.1
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• pp.55-61
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• 2011

In this paper, the outage probability of device-to-device (D2D) uplink communication underlaying cellular networks is analyzed over Rayleigh fading. We assume that a D2D pair and M cellular user equipments share the same frequency resources. To prevent any harmful interference from a D2D transmitter to the BS, the maximum transmit power of the D2D transmitter is strictly limited. Under these assumptions, the outage probability is represented as a function of the interference-to-signal ratio from M cellular user equipments to a D2D receiver and the number of cellular user equipments, M. In addition, the interference-to-signal ratio is represented as a function of distances among D2D equipments, cellular user equipments and the BS. Simulation results validate these analytical results.

• Journal of Broadcast Engineering
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• v.21 no.1
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• pp.109-112
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• 2016

This paper analyzes the outage performance of a two-way relay network in the presence of interference from multiple interferers. We investigate a two-way relay network where a single user communicates with a selected other user via a relay during three phases. We propose a user selection scheme and analyze an outage probability. Numerical results verify our analysis by comparison with computer simulation and show effects of the number of users and the number of interferers on its the outage probability.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.6A
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• pp.568-576
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• 2010

In this paper, we analyze the outage probability of full duplex relay (FDR) with decode-and-forward (DF) protocol is derived under fading channels. The fading channel for source-relay link is assumed to be Rician fading to consider the infrastructured fixed relay with line of sight (LOS) propagation, and the other fading channels are assumed to be Rayleigh fading. Based on this analytical result, we provide the criterion that FDR shows a lower outage probability than HDR to consider the interference problem and the resource efficiency improvement by full duplex (FD) operation. The accuracy of the analysis is confirmed throughout the simulation results.

• Journal of the Institute of Convergence Signal Processing
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• v.1 no.2
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• pp.115-121
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• 2000

This paper presents the analytic results of outage probability, considering the effect of Rician fading, interference and interference-reduction techniques, when a mobile communication system was constructed by using Stratospheric platform, one of the next generation wireless communication infrastructure which provides high speed multimedia services. The results show that carrier to interference power ratio C/I and fading depth K have an effect on outage probability. That is, outage probability decreases as K value increases for constant C/I value and C/I value increases for constant K value.