• Title/Summary/Keyword: Integrated Voice/Data Mobile Communication System

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Performance Analysis of a Cellular Mobile Communication System with Hybrid Guard Channels (Hybrid 가드채널이 있는 이동통신시스템이 성능 평가)

  • Hong, Sung-Jo;Choi, Jin-Yeong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.29 no.4
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    • pp.100-106
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    • 2006
  • We analyze a voice/data integrated traffic model of the cellular mobile communication system with hybrid guard channels for voice and handoff calls. In a multi-service integrated wireless environment, quality of service guarantee is crucial for smooth transportation of real time information. Real time voice traffic requires a guaranteed upper bounded on both delay and packet error rate, whereas data traffic does not. Voice traffic has high transmission priority over data packets. Thus one of the important problems is the design of admission control schemes which can efficiently accommodate the differential quality of service requirements. In this paper, a hybrid guard channel scheme is considered in which arriving calls are assigned channels as long as the number of busy channels in the cell is below a predetermined first threshold. When the number of busy channels reaches the first threshold, new originating data calls are queued in the infinite data buffer. Then reaches second threshold, only handoff calls are assigned the remaining channels and new originating voice calls are blocked. We evaluate the system by a two-dimensional Markov chain approach and generating function method and obtain performance measures included blocking probability and forced termination probability.

Analysis of traffic control policies in the voice-date integrated cellular CDMA mobile network (음성 및 데이터가 혼합된 CDMA 셀룰러 망에서의 트래픽 제어 분석 방법)

  • Yoon, Bok-Sik;Lee, Nam-Jun;Lee, Dong-Kie;Lie, Chang-Hoon
    • Journal of Korean Institute of Industrial Engineers
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    • v.22 no.4
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    • pp.771-788
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    • 1996
  • A CDMA-based cellular mobile telecommunication system has already been developed and is expected to provide more stable mobile communication services for much more users than traditional analog mobile systems. As a natural course of development, the CDMA mobile system is expected to provide ISDN services in the near future. In this paper, we analyze several traffic control policies for the voice-data integrated traffic in the cellular CDMA system. We first select four admission control policies which take differences in traffic and QOS characteristics between voice and data into account, and then develop modelling and analysis techniques, which can be used directly to analyze the chosen control policies. Our approach is based on so-called threshold model. Numerical computation results obtained under the typical traffic situation are also given. Through these computation results we could tentatively conclude that the cutoff priority policy, which can provide the priority for handoff voice cells while effectively utilizing unused channels, seems to be most effective among the four policies.

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Pricing Decisions to Control Quality-of-Service in Integrated Voice/Data Mobile Communication System (음성/데이터 통합 이동통신시스템에서의 서비스 품질을 고려한 가격결정모델)

  • Kim Whan Seon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.10B
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    • pp.866-879
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    • 2004
  • This paper presents a pricing model for maximizing a service provider's profit, taking into account consumers' quality-of-service dependent willingness to pay, in integrated voice/data mobile services. For the voice and the data services, time-sensitive pricing and volume-sensitive pricing mechanism will be applied, respectively, as in the case of Korea's mobile service market. Assuming that consumers are very sensitive to call interruption during handoff moments, the model presented here considers reserving guard channels exclusively for handoff traffic, in the process of frequency channels allocation, as well as guaranteeing consumers quality of service regarding call interruption rate. Ultimately, this model proposes a means to guarantee the quality of service in the short term, through pricing strategies as well as channel allocation policies, and the simulation results show that without expanding system resources, there exists a trade-off between profit and quality-of-service guarantee.

A Study on HCI Design based on Tactical Data Link integrated in KDDX Combat Management System for Korean-Type Mobile Fleet Control (차기구축함 전투관리체계에 통합된 전술데이터링크 기반의 한국형 기동함대 통제 HCI 설계에 관한 연구)

  • Song, Ha-Seok
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.12 no.5
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    • pp.482-492
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    • 2019
  • The naval ship consists of a variety of classes, including patrol, frigate, destroyer and landing ship. There are various means of communication between combat ships belonging to the mobile fleet, including voice network, text message network and tactical data link. The operation at the existing mobile fleet level was conducted mainly on voice and text message, and tactical data link were used mainly to share tactical information between combat ships. This study intended to design HCI for commander like as KDDX of fleet level based on tactical data link, a means of communication between ships, to secure operational control of the mobile fleet. Recently, naval ships have been developed in the organization of various sensors, weapons and tactical data links integrated into the combat management system, and this study also designed the HCI based on the tactical data links integrated in the combat management system. The purpose of this study was to secure the operational efficiency of the tactical data link based on the combat management system in operation of the mobile fleet, and to improve the capability of the fleet commander to recognize the battlefield situation awareness.

Performance of cellular CDMA system for voice/data integrated service (음성/데이타 집적서비스를 위한 CDMA 셀룰러 시스템의 성능 연구)

  • 강군화;조동호
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.19 no.9
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    • pp.1748-1758
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    • 1994
  • Recently, the demand of mobile communication is rapidly increasing. Also, not only the voice service but also the nonvoice services such as data, FAX, and image service are required. Therefore, in this paper, the voice/data intergraed service methods that will be utilized as a basic core technology of the PCS systems are proposed and their performances are analyzed and compared by computer simulation. According to the simulation results, it could be seen that the performance of voice/data integrated PR-CDMA method is better than that of voice/data integrated broadband CDMA method using a dedicated terminal or a voice/data integrated terminal. The reason is that the voice/data integrated PR-CDMA method can overcome the weak points of CDMA protocol, such as a limitation of the fixed CDMA logical channel number and a falling-off in channel utilization, by using PRMA protocol as a multiple access method that the terminals to which a CDMA logical channel is assigned compete.

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QoS Control and Link-Level Performance Analysis for Mobile IP of Wireless Communication Networks (이동인터넷을 위한 QoS 제어 및 링크레벨 성능분석)

  • 조정호;김광현;이형옥
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.5
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    • pp.941-950
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    • 2001
  • In this paper, we present the integrated network architecture for supporting mobile IP in third generation mobile communication networks, and propose the end-to-end QoS control mechanisms of DiffServ and QoS control functions of each network element in the proposed network. First, the QoS supporting schemes of IMT-2000 are described. Second, the necessities of integrating the networks are discussed and the integrated architecture are proposed. Third, the mapping between wireless channels and DiffServ classes are presented. Finally, the end-to-end QoS control mechanisms are proposed. We also analyze the link level protocols with QoS provisioning for mobile multimedia assuming that the system support voice and data traffic simultaneously. In case of data traffic, the delay and throughput of SREJ ARQ and Type-1 Hybrid ARQ scheme are compared, and In case of voice traffic, the packet loss rate of BCH coding is analyzed according to the varying data traffic loads. The results indicate that the adaptive link level protocols are efficient to meet the QoS requirements while the complexities are increased.

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Design of the 1.5kVA Class Wireless Power Transfer Device for Battery Charging of Integrated Power Control System in MSAP (군 이동기지국시스템(MSAP) 통합전원제어장치 배터리 충전용 1.5kVA급 무선전력전송기기의 설계)

  • Kim, Jin-Sung;Kim, Byung-Jun;Park, Hyeon-Jeong;Seo, Min-Sung
    • The Journal of the Korea institute of electronic communication sciences
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    • v.15 no.3
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    • pp.413-420
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    • 2020
  • The Tactical Information and Communication Network system provides real-time multimedia services such as voice and data by utilizing the Mobile Subscriber Access Point. At this time, an external transmission path is constructed through the Low Capacity Trunk Radio and the High Capacity Trunk Radio system. The communication devices of each wireless transmission system are mounted on a tactical vehicle and a secondary battery is used to prevent a power interruption when the supply power to the tactical vehicle is transferred to the integrated power control device. In this paper, the basic design of the Wireless Power Transfer device for charging the battery of the integrated power control system of the mobile base station system using the Loading Distribution Method and checking the number of primary windings and the core material selection by the air gap through the Finite Elements Method.

Multimedia Traffic Analysis using Markov Chain Model in CDMA Mobile Communication Systems (CDMA 이동통신 시스템에서 멀티미디어 트래픽에 대한 마르코프 체인 해석)

  • 김백현;김철순;곽경섭
    • Journal of Korea Multimedia Society
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    • v.6 no.7
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    • pp.1219-1230
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    • 2003
  • We analyze an integrated voice/data CDMA system, where the whole channels are divided into voice prioritized channels and voice non-prioritized channels. For real-time voice service, a preemptivc priority is granted in the voice prioritized channels. And, for delay-tolerant data service, the employment of buffer is considered. On the other hand, the transmission permission probability in best-effort packet-data service is controlled by estimating the residual capacity available for users. We build a 2-dimensional markov chain about prioritized-voice and stream-data services and accomplish numerical analysis in combination with packet-data traffic based on residual capacity equation.

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Design and Implementation of a Smart Home Cloud Control System Using Bridge based on IoT (IoT 기반의 브리지를 이용한 스마트 홈 클라우드 제어 시스템 설계 및 구현)

  • Hao, Xu;Kim, Chul-Won
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.5
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    • pp.865-872
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    • 2017
  • Recently, in response to the Internet age, the demand for hardware devices has been increasing, centering on the rapidly growing smart home field, due to the growth and management of sensor and control technology, mobile application, network traffic, big data management and cloud computing. In order to maintain the sustainable development of the hardware system, it is necessary to update the system, and the hardware device is absolutely necessary in real time processing of complex data (voice, image, etc.) as well as data collection. In this paper, we propose a method to simplify the control and communication method by integrating the hardware devices in two operating systems in a unified structure to solve the simultaneous control and communication method of hardware under different operating systems. The performance evaluation results of the proposed integrated hardware and the cloud control system connected to the cloud server are described and the main directions to be studied in the field of internet smart home are described.

A Protocol Compression Scheme for Improving Call Processing of Push-To-Talk Service over IMS (IMS망에서 PTT서비스의 통화 처리 성능 향상을 위한 프로토콜 압축 기법)

  • Jung, In-Hwan
    • Journal of Korea Multimedia Society
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    • v.12 no.2
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    • pp.257-271
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    • 2009
  • In this paper, we propose a protocol compression scheme for enhancing the performance of call processing of PTT(Push-to-Talk) which is one of the important services in IMS(IP Multimedia Subsystem), a next generation integrated wired/wireless packet communication network. To service the PTT on an IMS network, it should use the same call setup procedure as legacy Mobile and TRS(Trunked Radio System) networks and have a fast call setup time and enough communication bandwidth because a number of terminals should be able to exchange same data in real time. The proposed A+SigComp scheme reduces the initial call setup delay of SIP by about 10%, which is used by PTT service for call setup. In addition, the A+ROHC scheme is proposed to compress the header of RTP packets transferred during PTT voice transmission and, as a result, about 5% of increase in communication efficiency is observed.

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