Millimeter-Wave Wireless LAN and Its Extension toward 5G Heterogeneous Networks
Millimeter-Wave Wireless LAN and Its Extension toward 5G Heterogeneous Networks
复制标题
DOI：
10.1587/transcom.e98.b.1932
复制
发表时间：
2015-10-01
影响因子：
0.7
通讯作者：
Nanba, Shinobu
中科院分区：
文献类型：
--
作者：
Sakaguchi, Kei;Mohamed, Ehab Mahmoud;Nanba, Shinobu
毫米波频段，特别是60 GHz非授权频段，被认为是千兆位短距离无线通信系统的一种很有前途的解决方案。IEEE标准802.11ad，也称为WiGig，是为无线局域网(WLAN)使用60 GHz无许可频段而标准化的。通过使用这种毫米波无线局域网，可以实现多Gbps速率，以支持带宽密集型多媒体应用。穷举搜索和波束形成(BF)通常用于克服60 GHz的信道传播损耗，并在这样的MWWLAN中完成数据传输。由于其短距离传输和对路径阻塞的高度敏感性，应该使用多个毫米波接入点(AP)来完全覆盖未来高容量多Gbps无线局域网的典型目标环境。因此，MMWAP之间的协调是非常需要的，以克服由于不协调的穷举搜索BF而导致的分组冲突，并增加MWWLAN的总容量。在本文中，我们首先通过我们开发的WiGig AP原型给出了毫米波无线局域网的现状。然后，我们强调了作为未来高容量MMW无线局域网的关键使能器的MMW AP之间的协调传输的巨大需求。介绍了两种不同类型的协调MWWLAN体系结构。一种是分布式天线式架构，实现集中协调；另一种是借助传统Wi-Fi信令实现自主协调。此外，还引入了两种异构网(HetNet)架构，以有效地扩展协调的MWWLAN，以用于未来的第五代(5G)蜂窝网络。
Millimeter-wave (mmw) frequency bands, especially 60 GHz unlicensed band, are considered as a promising solution for giga-bit short range wireless communication systems. IEEE standard 802.11ad, also known as WiGig, is standardized for the usage of the 60 GHz unlicensed band for wireless local area networks (WLANs). By using this mmw WLAN, multi-Gbps rate can be achieved to support bandwidth-intensive multimedia applications. Exhaustive search along with beamforming (BF) is usually used to overcome 60 GHz channel propagation loss and accomplish data transmissions in such mmw WLANs. Because of its short range transmission with a high susceptibility to path blocking, multiple number of mmw access points (APs) should be used to fully cover a typical target environment for future high capacity multi-Gbps WLANs. Therefore, coordination among mmw APs is highly needed to overcome packet collisions resulting from un-coordinated exhaustive search BF and to increase total capacity of mmw WLANs. In this paper, we firstly give the current status of mmw WLANs with our developed WiGig AP prototype. Then, we highlight the great need for coordinated transmissions among mmw APs as a key enabler for future high capacity mmw WLANs. Two different types of coordinated mmw WLAN architecture are introduced. One is distributed antenna type architecture to realize centralized coordination, while the other is autonomous coordination with the assistance of legacy Wi-Fi signaling. Moreover, two heterogeneous network (HetNet) architectures are also introduced to efficiently extend the coordinated mmw WLANs to be used for future 5th Generation (5G) cellular networks.