The Experts below are selected from a list of 186 Experts worldwide ranked by ideXlab platform

Akihiro Maruta - One of the best experts on this subject based on the ideXlab platform.

  • deployment design of functional split base station in fixed and wireless multihop fronthaul
    Global Communications Conference, 2018
    Co-Authors: Daisuke Hisano, Yu Nakayama, Kazuki Maruta, Akihiro Maruta
    Abstract:

    A new functional split mobile base station (MBS) has been getting attention for 5G and beyond 5G(BSG) to reduce an optical bandwidth. The MBS is split into three components: a central unit (CU), a distributed unit (DU), and a radio unit (RU). The link between a DU and a RU is connected by an optical fiber and well known as fronthaul. In particular, RUs will be densely deployed in Antenna Site to increase the mobile data rate. There is inefficiency in the bandwidth usage in the fronthaul link because all the RUs are not always in activated state. Therefore, a mobile operator needs a cost-effective fronthaul network. Employing the wireless multihop system has been studied to construct 5G/B5G fronthaul network. Both optical and wireless links should be employed since it is challenging to replace all of the optical link to the wireless link. However, the method of the deployment of the DU Site to reduce the optical fiber cost has not been considered. This paper proposes a novel efficient deployment design of DU Site incorporating wireless multihop connection in order to satisfactory reduce optical fiber deployment cost.

  • GLOBECOM - Deployment Design of Functional Split Base Station in Fixed and Wireless Multihop Fronthaul
    2018 IEEE Global Communications Conference (GLOBECOM), 2018
    Co-Authors: Daisuke Hisano, Yu Nakayama, Kazuki Maruta, Akihiro Maruta
    Abstract:

    A new functional split mobile base station (MBS) has been getting attention for 5G and beyond 5G(BSG) to reduce an optical bandwidth. The MBS is split into three components: a central unit (CU), a distributed unit (DU), and a radio unit (RU). The link between a DU and a RU is connected by an optical fiber and well known as fronthaul. In particular, RUs will be densely deployed in Antenna Site to increase the mobile data rate. There is inefficiency in the bandwidth usage in the fronthaul link because all the RUs are not always in activated state. Therefore, a mobile operator needs a cost-effective fronthaul network. Employing the wireless multihop system has been studied to construct 5G/B5G fronthaul network. Both optical and wireless links should be employed since it is challenging to replace all of the optical link to the wireless link. However, the method of the deployment of the DU Site to reduce the optical fiber cost has not been considered. This paper proposes a novel efficient deployment design of DU Site incorporating wireless multihop connection in order to satisfactory reduce optical fiber deployment cost.

A.m.j. Koonen - One of the best experts on this subject based on the ideXlab platform.

  • radio over mmf techniques part ii microwave to millimeter wave systems
    Journal of Lightwave Technology, 2008
    Co-Authors: A.m.j. Koonen, L M Garcia
    Abstract:

    Microwave to mm-wave radio carriers are commonly employed for creating high-capacity picocell wireless networks. Advanced radio-over-fiber (RoF) techniques can efficiently generate and transport such carriers, and deliver them to simplified Antenna stations. As in in-building networks multimode fiber is predominantly used, adequate radio-over-multimode fiber (RoMMF) techniques are required to overcome the modal dispersion in multimode fiber links. The optical frequency multiplying technique is introduced; it is relatively simple to implement, yet it is shown to be robust against the modal dispersion, and it is able to generate very pure microwave carriers while requiring only moderate speed electronics. Thus, it can convey high data rates in comprehensive modulation formats on multiple-GHz carriers in MMF networks. It offers simultaneous operation at multiple radio standards, and capabilities for dynamic adaptation of the radio link parameters such as carrier frequency, transmit power, and other Antenna Site functions by means of an embedded control channel. Moreover, in combination with optical routing it enables dynamically adjustable network configurations for flexible wireless service delivery.

  • Fiber-based broadband wireless access employing optical frequency multiplication
    IEEE Journal on Selected Topics in Quantum Electronics, 2006
    Co-Authors: M. García Larrodé, A.m.j. Koonen, Juan José Vegas Olmos
    Abstract:

    Employing optical frequency multiplication, we demonstrate experimentally the simultaneous delivery of different 64QAM radio signals at 5.8 and 17.7 GHz after 4.4 km of multimode fiber in a single radio-over-fiber link. We also propose a flexible mechanism for the dynamic radio link adaptation, and the simultaneous transmission of an in-band control channel with the wireless data channels for power control purposes at the Antenna Site is demonstrated experimentally

  • RF bandwidth capacity and SCM in a radio-over-fibre link employing optical frequency multiplication
    31st European Conference on Optical Communications (ECOC 2005), 2005
    Co-Authors: M. García Larrodé, A.m.j. Koonen, J. J. Vegas Olmos, I. Tafur Monroy, T.c.w. Schenk
    Abstract:

    We demonstrate the feasibility of generating two 24 Mbps 64-QAM radio signals simultaneously at 17.3 GHz and 17.8 GHz after 4.4 km of multimode fibre in an OFM radio-over-fibre link for wireless multistandard support at the Antenna Site. (2 pages)

  • Transparent transport of wireless communication signals in radio-over-fibre systems
    2005
    Co-Authors: M.g. Larrode, A.m.j. Koonen, Juan Jose Vegas Olmos, G.-j. Rijckenberg, L Dang Bao, Igmm Ignas Niemegeers
    Abstract:

    The evolution of current wireless access communication networks, especially inside buildings, moves towards higher microwave carrier frequencies in order to support the ever-growing data traffic volumes. This causes significant infrastructure cost increments due to the complexity and increased number of Antenna Sites needed for a certain area of coverage. Radio-over-Fibre (RoF) distribution Antenna systems can reduce costs by means of consolidating the radio access control and signal processing at a central Site (CS), and delivering the radio signals transparently to the Antenna Sites (ASs). Employing the Optical Frequency Multiplication (OFM) technique, we show experimentally the feasibility of delivering different radio signal modulations (e.g., 16QAM, 64-QAM) with different data rates (from 24 to 78 Mbps) at 17.8 GHz, while maintaining the required optical link transparency. Additionally, the medium access control (MAC), duplexing schemes and multiple access methods of the different wireless systems put key requirements on the design of radioover-fibre distribution networks, since the additional propagation delay inserted by the optical link has to be considered from the central controller for supporting such systems. Centrally-scheduled radio MAC schemes, like the ones defined in IEEE 802.16, enable the accommodation of the fibre link between the CS and the AS in exchange for a reduction in the radio bandwidth utilization, which decreases linearly with the fibre length. Introduction Radio-over-Fibre (RoF) distribution Antenna systems have been identified as a promising option for the access architecture of the emerging wireless access communication networks, specially inside buildings, as a means of reducing infrastructure cost and Antenna Site complexity, and generating high microwave carrier frequencies optically. In this approach, the insertion of an optical link between the central station (CS) and the Antenna Site (AS) lies within the physical layer of the wireless system to be supported, independently of the radio-over-fibre technique employed (Fig. 1). The optical distribution system behaves as an analogue transmission system that shall not modify the nature of the radio signal format, but deliver it with the best possible accuracy at the remote Antenna location, which acts as a transparent analogue repeater-interface from the optical medium to the radio medium. Since the radio control is located at the central Site, a remote radio medium access control has to be performed, thus converting the optical domain in an extension of the radio domain access. Therefore, the radio characteristics and the wireless system requirements set the boundaries and limitations for the optical distribution system design.

Daisuke Hisano - One of the best experts on this subject based on the ideXlab platform.

  • deployment design of functional split base station in fixed and wireless multihop fronthaul
    Global Communications Conference, 2018
    Co-Authors: Daisuke Hisano, Yu Nakayama, Kazuki Maruta, Akihiro Maruta
    Abstract:

    A new functional split mobile base station (MBS) has been getting attention for 5G and beyond 5G(BSG) to reduce an optical bandwidth. The MBS is split into three components: a central unit (CU), a distributed unit (DU), and a radio unit (RU). The link between a DU and a RU is connected by an optical fiber and well known as fronthaul. In particular, RUs will be densely deployed in Antenna Site to increase the mobile data rate. There is inefficiency in the bandwidth usage in the fronthaul link because all the RUs are not always in activated state. Therefore, a mobile operator needs a cost-effective fronthaul network. Employing the wireless multihop system has been studied to construct 5G/B5G fronthaul network. Both optical and wireless links should be employed since it is challenging to replace all of the optical link to the wireless link. However, the method of the deployment of the DU Site to reduce the optical fiber cost has not been considered. This paper proposes a novel efficient deployment design of DU Site incorporating wireless multihop connection in order to satisfactory reduce optical fiber deployment cost.

  • GLOBECOM - Deployment Design of Functional Split Base Station in Fixed and Wireless Multihop Fronthaul
    2018 IEEE Global Communications Conference (GLOBECOM), 2018
    Co-Authors: Daisuke Hisano, Yu Nakayama, Kazuki Maruta, Akihiro Maruta
    Abstract:

    A new functional split mobile base station (MBS) has been getting attention for 5G and beyond 5G(BSG) to reduce an optical bandwidth. The MBS is split into three components: a central unit (CU), a distributed unit (DU), and a radio unit (RU). The link between a DU and a RU is connected by an optical fiber and well known as fronthaul. In particular, RUs will be densely deployed in Antenna Site to increase the mobile data rate. There is inefficiency in the bandwidth usage in the fronthaul link because all the RUs are not always in activated state. Therefore, a mobile operator needs a cost-effective fronthaul network. Employing the wireless multihop system has been studied to construct 5G/B5G fronthaul network. Both optical and wireless links should be employed since it is challenging to replace all of the optical link to the wireless link. However, the method of the deployment of the DU Site to reduce the optical fiber cost has not been considered. This paper proposes a novel efficient deployment design of DU Site incorporating wireless multihop connection in order to satisfactory reduce optical fiber deployment cost.

P.j. Dellwo - One of the best experts on this subject based on the ideXlab platform.

  • Quality Antenna Site management (land mobile radio)
    IEEE 39th Vehicular Technology Conference, 1
    Co-Authors: P.j. Dellwo
    Abstract:

    The author provides a fairly nontechnical portrayal of his experience in managing an Antenna Site in Jacksonville. The company's strategy to achieve business success through quality is outlined. The following elements of the strategy are described in detail: (1) premium Site, (2) master Antenna system, (3) quality installation, (4) resident Site manager, and (5) control of interference. >

L M Garcia - One of the best experts on this subject based on the ideXlab platform.

  • radio over mmf techniques part ii microwave to millimeter wave systems
    Journal of Lightwave Technology, 2008
    Co-Authors: A.m.j. Koonen, L M Garcia
    Abstract:

    Microwave to mm-wave radio carriers are commonly employed for creating high-capacity picocell wireless networks. Advanced radio-over-fiber (RoF) techniques can efficiently generate and transport such carriers, and deliver them to simplified Antenna stations. As in in-building networks multimode fiber is predominantly used, adequate radio-over-multimode fiber (RoMMF) techniques are required to overcome the modal dispersion in multimode fiber links. The optical frequency multiplying technique is introduced; it is relatively simple to implement, yet it is shown to be robust against the modal dispersion, and it is able to generate very pure microwave carriers while requiring only moderate speed electronics. Thus, it can convey high data rates in comprehensive modulation formats on multiple-GHz carriers in MMF networks. It offers simultaneous operation at multiple radio standards, and capabilities for dynamic adaptation of the radio link parameters such as carrier frequency, transmit power, and other Antenna Site functions by means of an embedded control channel. Moreover, in combination with optical routing it enables dynamically adjustable network configurations for flexible wireless service delivery.