• Title/Summary/Keyword: Multimedia Cellular Networks

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Energy-Efficient Base Station Operation in Heterogeneous Cellular Networks

  • Nguyen, Hoang-Hiep;Hwang, Won-Joo
    • Journal of Korea Multimedia Society
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    • v.15 no.12
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    • pp.1456-1463
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    • 2012
  • In this paper, we study the ON/OFF control policy of base stations in two-tier heterogeneous cellular networks to minimize the total power consumption of the system. Using heterogeneous cellular networks is a potential approach of providing higher throughput and coverage compared to conventional networks with only macrocell deployment, but in fact heterogeneous cellular networks often operates regardless of total power consumption, which is a very important issue of modern cellular networks. We propose a policy that controls the activation/deactivation of base stations in heterogeneous cellular networks to minimize total power consumption. Under this policy, the total power consumed can be significantly reduced when the traffic is low while the QoS requirement is satisfied.

Resource Allocation for Device-to-Device Communications Reusing Uplink in Cellular Networks

  • Radwan, Amr
    • Journal of Korea Multimedia Society
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    • v.18 no.12
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    • pp.1468-1474
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    • 2015
  • Efficient spectrum sharing is an important issue in Device-to-Device (D2D) communications underlaying cellular networks as it can mitigate the interference to cellular users and improve the performance of the systems. In this paper, we formulate the radio resource allocation in D2D communications as a mixed nonlinear integer programing. We show the formulated problem is NP-hard and thus a polynomial time algorithm to solve is not possible. Since such a problem is very hard to obtain the optimal solution within a short running time, we instead propose a fast heuristic suboptimal algorithm to mitigate the interference caused to cellular users and improve the performance of the systems. Simulation results are provided to evaluate the performance of the proposed algorithm.

Energy-Efficient Base Station Operation in Heterogeneous Cellular Networks

  • Nguyen, Hoang-Hiep;Pham, Ngoc-Thai;Hwang, Won-Joo
    • Proceedings of the Korea Multimedia Society Conference
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    • 2012.05a
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    • pp.158-159
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    • 2012
  • Heterogeneous cellular networks can provide high throughput and coverage compare to conventional networks of only macrocell deployment, however it operates regardless of total power consumption, which is a very important issue of modern cellular networks. We propose a policy that control the on/off state of base stations in heterogeneous networks according daily traffic profile. Under this policy, the total power consumed can be significantly reduced when the traffic is low while preserving QoS requirement.

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CRSVP-based QoS Guaranteeing Scheme for Micro Cellular Network Environments (마이크로 셀룰러 네트워크 환경을 위한 CRSVP기반 QoS 보장 기법)

  • 정은영;박상윤;석민수;엄영익
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.6A
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    • pp.351-360
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    • 2003
  • To provide good-quality services of multimedia in wireless mobile networks, QoS for multimedia traffic should be guaranteed. However, since the existing QoS guaranteed schemes are designed for fixed networks, they are inadequate in the wireless network environments. Recently, as the size of cells like micro cell or pico cell becomes smaller. Mobile hosts on micro cellular networks, change their location frequently. It causes many drawbacks such as delayed delivery, packet losses and signaling overheads. Because the existing schemes supporting interoperability between RSVP and Mobile If are designed for macro cell environments. Their uses in micro cellular networks can be restricted. In this paper, we propose the CRSVP(Cellular RSVP Protocol) which supports QoS in micro cellular network environments.

Interference Coordination for Device-to-Device (D2D) under Multi-channel of Cellular Networks

  • Zulkifli, Aunee Azrina;Huynh, Thong;Kuroda, Kaori;Hasegawa, Mikio
    • Journal of Multimedia Information System
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    • v.3 no.4
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    • pp.135-140
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    • 2016
  • To improve the throughput of Device-to-Device (D2D) communication, we focus on the scenario where D2D pair can reuse multi-channel of cellular communication. However, as sharing same channel with cellular communication can cause interference between D2D communication and cellular communication, a proper interference management is needed. In this paper, we propose interference-based channel allocation to select the channels to be used by D2D communication and a solution from game theory perspective to optimize the D2D communication throughput under multi-channel as well as guarantee the interference from it to cellular network. The simulation results verify the stability of the proposed method.

Adaptive Online Bandwidth Management Algorithms for Multimedia Cellular Networks (멀티미디어 셀룰러 네트워크 상에서의 효율적인 온라인 대역폭 관리기법에 대한 연구)

  • Kim Sung-Wook
    • The KIPS Transactions:PartC
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    • v.13C no.2 s.105
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    • pp.171-176
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    • 2006
  • Bandwidth is an extremely valuable and scarce resource in a wireless network. Therefore, efficient bandwidth management is necessary in order to provide high qualify service to users with different requirements in a multimedia wireless/mobile network. In this paper, we propose an on-line bandwidth reservation algorithm that adjusts bandwidth reservations adaptively based on existing network conditions. The most important contribution of our work is an adaptive algorithm that is able to resolve conflicting performance criteria - bandwidth utilization, call dropping and call blocking probabilities. Our algorithm is quite flexible, is responsive to current traffic conditions in cellular networks, and tries to strike the appropriate performance balance between contradictory requirements for QoS sensitive multimedia services.

Adaptive Online Load Balancing Algorithm for Multimedia Service in Cellular Networks (셀룰러 네트워크 상에서 멀티미디어 서비스 제공을 위한 효율적인 온라인 부하분산 기법에 대한 연구)

  • Kim, Sung-Wook
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.12B
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    • pp.811-817
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    • 2005
  • Efficient bandwidth management is necessary in order to provide high quality service to users in a multimedia wireless/mobile network. In this paper, I propose an on-line load balancing algorithm with preemption. This technique is able to balance the traffic load among cells accommodating heterogeneous multimedia services while ensuring efficient bandwidth utilization. The most important features of my algorithm are its adaptability, flexibility and responsiveness to current network conditions. In addition, my online scheme to control bandwidth adaptively is a cell-oriented approach. This approach has low complexity making it practical for real cellular networks. Simulation results indicate the superior performance of my algorithm.

Adaptive Load Balancing Algorithms for Overlay Multimedia Network (오버레이 네트워크에서 멀티미디어 서비스를 위한 적응적인 부하균형 기법)

  • Kim, Sung-Wook;Kim, Sung-Chun
    • Journal of KIISE:Information Networking
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    • v.34 no.4
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    • pp.239-245
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    • 2007
  • New multimedia services over the cellular/WLAN overlay networks require different Quality of Service (QoS). In the cellular/WLAN overlay structure, the main issue of load balancing is to balance the available bandwidth among different networks. In this paper, we propose a new online network management scheme. Our proposed scheme is designed to improve bandwidth utilization by balancing the traffic load between the cellular network and WLANs. Simulation results indicate the superior performance of our proposed framework to strike the appropriate performance balance between contradictory QoS requirements under widely varying diverse traffic loads.

Analysis of the Capacity Region for Two-tier Spatial Diversified Wireless Mesh Networks

  • Torregoza, John Paul;Choi, Myeong-Gil;Hwang, Won-Joo
    • Journal of Korea Multimedia Society
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    • v.11 no.12
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    • pp.1697-1705
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    • 2008
  • Several studies made for wireless mesh networks aim to optimize the capacity for wireless networks. Aside from protocol improvements, researches were also done on the physical layer particularly on modulation techniques and antenna efficiency schemes. This paper is concerned with the capacity improvements derived from using spatial diversity with smart adaptive array antennas. The use of spatial diversity, which has been widely proposed for use in cellular networks in order to lessen frequency re-use, can be used in mesh networks both to minimize co-channel interference (CCI) and enable multiple transmissions. This paper aims to study the capacity region and bounds in using smart antennas for single-channel multi-radio systems in relation to the number of spatial diversity or sectors as defined by the beam angle $\beta$.

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Adaptive Overlay Network Management Algorithms for QoS sensitive Multimedia Services (멀티미디어 서비스의 품질 보장을 위한 오버레이 네트워크 관리 기법에 대한 연구)

  • Kim, Sung-Wook;Kim, Sung-Chun
    • The KIPS Transactions:PartC
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    • v.14C no.1 s.111
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    • pp.81-86
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    • 2007
  • New multimedia services over the cellular/WLAN overlay networks require different Quality of Service (QoS). Therefore, efficient network management system is necessary in order to provide QoS sensitive multimedia services while enhancing network performance. In this paper, we propose a new online network management scheme that implements bandwidth reservation, congestion and transmission control strategies. Our online approach to network management exhibits dynamic adaptability, flexibility, and responsiveness to the current traffic conditions in multimedia overlay networks. Simulation results indicate the superior performance of our proposed scheme to strike the appropriate performance balance between contradictory QoS requirements under widely varying diverse traffic loads.