• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.12
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• pp.63-72
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• 2007

This paper addresses the system development that can transfer data and TDM signals simultaneously by adding TDM pseudowires functions to E-PON system. E-PON technology is one of many technologies which can realize FTTH, has raised as next generation access network solution having both low-cost Ethernet technology and optical infrastructure. TDM pseudowires service is the new voice/data conversion technology which can transfer the existing TDM circuit switched voice and data over packet switching network. In this paper, this system can provide both data and TDM service without deteriorating QoS by adding TDM pseudowires service module to E-PON, and then implementing QoS control function. Therefore, the competitive system which can transfer both data and TDM signal, can be installed.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.19 no.2
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• pp.306-321
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• 1994

Since TDM protocol can be easily implemented and show high throughput at heavy load, the researches on the multi-channel high-speed network based on TDM access control have been getting more attention than ever. TDM type multi-channel network, however, has disadvantages of excessive delay at light load and inadaptibility to traffic skewing. In this paper, we proposed a new multi-channel TDM structure, time slots are allocated proportional to the traffic flow pattern among the nodes. thus delay and throughput performance are improved. Design principles of TDM frame are discussed considering traffic locality and the number of available channels. Approximate analytic models for delay evaluation are developed and verified by simulations.

• Journal of KIISE:Computer Systems and Theory
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• v.26 no.3
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• pp.350-362
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• 1999

본 논문은 WDM(wavelength division multiplexing) 수동 성형망(passive star network)에서의 클라이언트/서버 트래픽을 위한 효율적인 TDM(time division multiplexing )스케쥴링을 제시한다. 클라이언트/서버 트래픽은 서버 노드의 소, 수신 트래픽 양이 클라이언트 노드간의 트래픽양에 비해 상대적으로 크다. 이러한 트래픽 특성 때문에 , TT-FR 시스템의 TDM 스케쥴링 방법을 적용할 때에 TDM 프레임 길이가 길어지게 된다. 본 논문에서 제시하는 TDM 스케쥴링은 TT-TR 시스템 알고리즘이다. 제시하는 스케쥴링에서는 서버 노드의 송신 및 수신에 각각 하나씩의 파장을 먼저 할당한다. 따라서 각 클라이언트 노드는 송, 수신 모두를 위해 파장 조정이 요구된다. 이러한 새로운 TDM 스케쥴링은 클라이언트/서버 트래픽에 적합하고 기존의 방법보다 짧은 프레임 길이를 제공하며, 또한 TDM 프레임길이의 하한을 새로이 제공한다. 제시한는 TT-TR 시스템 기반의 TDM 스케쥴링 알고리즘의 수행도 평가를 위해 다양한 시뮬레이션 분석을 수행하였다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.11
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• pp.21-26
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• 2005

We propose a fully converged Ethernet and TDM transport system. Developed Ethernet and TDM convergence system can support not only L2 VPN service and premium multimedia service based on MPLS protocol but also TDM leased line service, simultaneously. Developed convergence system can provide high reliability for Ethernet packet due to support protection and restoration function of circuit based networks. Evaluation for Ethernet and TDM path was successfully performed to show the typical application of the proposed system in the legacy networks.

• Journal of the Korean Institute of Telematics and Electronics
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• v.20 no.1
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• pp.27-36
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• 1983

The 12-Channe1 TDM/FDM translator is proposed which uses a periodically varying digital filter and the multiplexing weaver modulators. The general 12-Channel TDM/FDM translator using the Weaver modulators requires 24 interpolating FIR(finite impulse response) filters and 24 sinusoidal modulators, however the TDM/FDM translator proposed in this paper consists of one interpolating periodically varying digital filter and 12 sinusoidal modulators. The results obtained in this paper show that the system is simplified and the computation time is reduced. These facts are verified by the computer simulation.

• Journal of the Korean Institute of Telematics and Electronics
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• v.20 no.3
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• pp.21-28
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• 1983

Four new types of TDM/FDM translation system are proposed in this paper. In the proposed system, the periodically time varying filters (P.V.F) are used in order to modify the general TDM/FDM conversion systems. The new systems have the simple structure as compared with the existing systems and the multiplication rate is reduced to about 2.0${\times}$10 multiplications/s$.$channel. It is verified by the computer simulation that the proposed systems can be used as 12-channel TDM/FDM translation systems.

• Pediatric Infection and Vaccine
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• v.21 no.1
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• pp.9-21
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• 2014

Purpose: To determine the clinical significance of voriconazole therapeutic drug monitoring (TDM) in the pediatric population. Methods: Twenty-eight patients with invasive fungal infections administered with voriconazole from July 2010 to June 2012 were investigated retrospectively. Fourteen received TDM, and 143 trough concentrations were analyzed. All 28 patients were assessed for adverse events and treatment response six weeks into treatment, and at the end. Results: Out of 143 samples, 53.1% were within therapeutic range (1.0-5.5 mg/L). Patients administered with the same loading (6 mg/kg/dose) and maintenance (4 mg/kg/dose) dosages prior to initial TDM showed highly variable drug levels. Adverse events occurred in 9 of 14 patients (64.3%) in both the TDM and non-TDM group. In the TDM group, voriconazole-related encephalopathy (n=2, 14.3%) and aspartate aminotransferase (AST) or alanine aminotransferase (ALT) elevation (n=8, 57.1 %) occurred with serum levels in the toxic range (>5.5 mg/L), whereas blurred-vision (n=2, 14.3%) occurred within the therapeutic range (1.18 mg/L and 3.9 mg/L). The frequency of voriconazole discontinuation due to adverse events was lower in the TDM group (0.0% vs. 18.2%, P =0.481). Overall, 57.2% of the patients in the TDM group versus 14.3% in the non-TDM group showed clinical response after 6 weeks (P =0.055), whereas 21.4% in the TDM group versus 14.3% in the non-TDM group showed response at final outcome (P =0.664). In the TDM group, >67.0% of the serum levels were within therapeutic range for the first 6 weeks; however 45.5% were within therapeutic range for the entire duration. Conclusion: Routine TDM is recommended for optimizing the therapeutic effects of voriconazole.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.9B
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• pp.751-759
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• 2003

We analyze the performances, such as the cell loss probability(CLR) and the cell delay time, of time division multiplexed(TDM) optical output buffers using traveling delay lines or delay-line loops for buffering. Since traveling delay lines used for buffering are superior over delay-line loops in terms of simplicity and signal quality, they were used in a conventional TDM optical output buffer. However, the latter is more flexible than the former in that the cell storage time is adjustable by changing the recirculating times of a cell in the loops. So we propose a novel TDM optical output buffer using delay-line loops for buffering. We show that the proposed TDM optical output buffer can reduce the number of buffering unit required to achieve a CLR of less than 10$^{-9}$ . When the number of buffering unit is sufficiently large, we show that both TDM optical output buffers have same cell delay time characteristic.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.7A
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• pp.741-747
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• 2004

This paper will discuss the Design and Implementation of common Backplane for TDM/Data System. Transmission performance of over 10Gbps in proposed commom or converged backplane architecture was discussed and demonstrated using readily available components.

• Proceedings of the IEEK Conference
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• 2005.11a
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• pp.237-240
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• 2005

We propose a fully converged Ethernet and TDM transport system. Developed Ethernet and TDM convergence system can support not only L2VPN service and premium multimedia service based on MPLS protocol but also TDM leased line service, simultaneously. Developed convergence system can provide high reliability for Ethernet data due to support protection and restoration function of circuit based networks. Evaluation for Ethernet and TDM path was successfully performed to show the typical application of the proposed system in the legacy networks.