CN102668417B - 用于协议独立的有线及/或无线通信的无线电光纤(rof)系统 - Google Patents

用于协议独立的有线及/或无线通信的无线电光纤(rof)系统 Download PDF

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CN102668417B
CN102668417B CN201080055264.7A CN201080055264A CN102668417B CN 102668417 B CN102668417 B CN 102668417B CN 201080055264 A CN201080055264 A CN 201080055264A CN 102668417 B CN102668417 B CN 102668417B
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access point
peer device
optical fiber
heu
radio
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CN102668417A (zh
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雅各布·乔治
迈克尔·索尔
迪安·M·西伦
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Corning Research and Development Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25751—Optical arrangements for CATV or video distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H04B10/25752—Optical arrangements for wireless networks
    • H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
    • H04B10/25754—Star network topology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Optical Communication System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种光转换的光纤通信系统(例如基于无线电光纤(Radio-over-Fiber，RoF)的光纤链接系统)可用于增加同级点通信的范围。光转换的光纤通信系统可包括具有光转换触排的头端单元(HEU)。包括光纤的光纤电缆将HEU光耦合至在不同覆盖区域的一或多个远程接入点。在HEU中的光转换触排提供不同覆盖区域中远程接入点之间的链接，使得不同蜂窝式覆盖区域中的装置可以经由HEU通过光纤而互相通信。通过使用光转换光纤通信系统，可以延伸装置之间的通信范围和通信覆盖，使得不同覆盖区域中的装置和使用不同通信协议的装置可进行通信。

Description

用于协议独立的有线及/或无线通信的无线电光纤(ROF)系统
技术领域
本发明是关于使用无线电光纤通信系统的有线及/或无线通信系统。
背景技术
无线通信正在迅速成长，不断增加高速移动数据通信的需求。作为一例，所谓的“无线保真”或“无线网络”系统和无线局域网络(WLAN)部署在多种不同类型的地区(如咖啡店、机场、图书馆等)。无线通信系统与称为“客户端”的无线装置通信，所述无线装置必须常驻在无线范围或“蜂窝式覆盖区域”内，以与接入点装置通信。
一种部署无线通信系统的方法包括使用“微微蜂窝”。微微蜂窝是射频(RF)覆盖区域。举例来说，微微蜂窝的半径范围可从几米到二十米。结合数个接入点装置建立覆盖称为“微微蜂窝式覆盖区域”的微微蜂窝式数组。由于微微蜂窝式覆盖小区域，每个微微蜂窝通常只有几个使用者(客户端)。这样就可以同时提供无线系统使用者高覆盖品质及高数据传输速率，并最小化无线系统使用者共享的RF带宽。微微蜂窝的一个优势是能够与在微微蜂窝式覆盖区域内、位于远程的通信装置无线通信。
一种建立微微蜂窝的无线通信系统类型称为“无线电光纤(RoF)”无线系统。RoF无线系统使用通过光纤传送的射频信号。这种系统包括光耦合到多个远程单元的头端站。每个远程单元包括通过光纤链接耦合至头端站的转发器。在远程单元的转发器对射频信号而言是透明的。远程单元通过光到电(O/E)转换器将传入的光信号从光纤链接转换至电子信号，然后再传到转发器。通过耦合到在远程单元中的转发器的天线，转发器将电子信号转换成电磁信号。天线也从蜂窝式覆盖区域中的客户端接收电磁信号(即电磁辐射)并将电磁信号转换为电子信号(即线路中的电子信号)。然后，远程单元通过电到光(E/O)转换器将电子信号转换成光信号。然后光信号通过光纤链接传送到头端站。
有线和无线的同级点模拟和数字通信一般是分别对于范围和覆盖有所限级。加强有线同级点连接的范围可能需要复杂的放大及/或重复请求。扩大无线同级点连接的覆盖通常需要较密集的天线布署及/或传输功率的增加，这可能会被政府法规、无线标准、电池峰值功率和储能考虑所限制。此外，扩大覆盖区域可能会由于使用专属协议(如医疗装置)而被禁止。
发明内容
本文揭示的实施例包括光转换的光纤有线及/或无线通信系统和增加有线及/或无线同级点通信系统的范围的相关方法。在一实施例中，光转换光纤有线及/或无线通信系统可能包括具有光转换触排的头端单元(HEU)。多个光纤电缆，所述光纤电缆的每个包括至少一光纤且配置以将无线电光纤(RoF)信号从所述头端单元传递到多个远程接入点。所述远程接入点的第一接入点经配置以形成第一同级装置所位于的相应的第一蜂窝式覆盖区域。所述远程接入点的第二接入点经配置以形成第二同级装置所位于的相应的第二、不同的蜂窝式覆盖区域。所述光转换触排经配置以通过所述光纤电缆的至少一个动态建立基于RoF的光链接，以使所述第一覆盖区域中的所述第一同级装置至少部分通过所述基于RoF的光链接与所述第二覆盖区域中的所述第二同级装置通信。
本文揭示的另一实施例提供一种使在第一蜂窝式覆盖区域中的第一同级装置与在第二、不同的蜂窝式覆盖区域中的第二同级装置之间能够通信的方法。所述方法可包括以下步骤：通过多个光纤电缆，将多个远程接入点光连接至头端单元(HEU)，所述光纤电缆的每个包括至少一光纤并经配置以从所述HEU传递无线电光纤(RoF)信号至所述远程接入点。形成与所述远程接入点的第一接入点相关的第一蜂窝式覆盖区域。形成与所述远程接入点的第二接入点相关但不同于所述第一覆盖区域的第二蜂窝式覆盖区域。接收请求，以建立第一同级装置与第二同级装置之间的通信，并响应于所述请求，通过所述光纤电缆的至少一个，动态建立基于RoF的光链接，以允许所述第一同级装置至少部分通过所述基于RoF的光链接与所述第二同级装置通信。
本文揭示的系统和方法可配置以克服传统的有线及/或无线(“有线/无线”)同级点通信的局限性，这是通过结合光纤的低损耗、高带宽性质与适当的光转换网络以提高覆盖区域(在需要之处)。在一实施例中，光转换的光纤有线/无线通信系统是基于RoF的连接系统。在另一实施例中，基于RoF的链接系统几乎是协议透明的(即独立于协议)。
本文揭示的光转换光纤有线/无线通信系统和方法可能包括密集的光纤电缆部署(如在微微蜂窝中)，这可促进蜂窝间(cell-to-cell)、同级点(peer-to-peer)通信。通过有效利用光转换的光纤有线/无线通信系统的光纤电缆架构(如RoF无线局域网络(WLAN)微微蜂窝式系统)，同级点通信的范围可延伸至蜂窝间。在这方面，在任何两个蜂窝中的装置可以独立于各自的实体距离而在同级点模式通信，使得同级点范围扩展到整个室内安装区域。
此外，光转换的光纤有线/无线通信系统和方法可以使用几乎透明于无线协议的光学电缆链接，因而消除了专属协议合规要求。因此，在没有任何基础设施升级的情况下可支持广泛的现有应用程序/装置，包括转换的视频连接、具互联网连接的转换视频、同级点专属协议装置(如医疗)、同级点视频会议及广播能力(蜂窝和视频)。此外，在没有任何基础设施升级的情况下，未来的应用程序/装置是可能的。
本文揭示的光转换的光纤有线/无线通信系统和方法利用无线局域网络(如WLAN)来开始同级点转换，因为转换只需要非常低的数据传输速率连接。可以支持多种输入选项，如射频(RF)电缆/天线输入、光纤输入及电力输入。可以使用多种输出选项，包括射频电缆/天线输出、具光/电转换的光纤输出、具E/O转换旁路的光纤输出以及电力输出。光转换的光纤有线/无线通信系统可升级到更高的频率，例如60GHz。
附图说明
图1表示基于光纤的无线微微蜂窝式系统的范例实施例示意图；
图2表示范例无线电光纤(RoF)分布式通信系统的示意图；
图3表示图1系统的范例实施例的更详细示意图，图3表示头端单元(HEU)和图1范例系统的远程单元和微微蜂窝式式系统；
图4表示使用光转换光纤有线及/或无线(“有线/无线”)通信系统的范例实施例的示意图，以允许根据一范例实施例在同级点装置之间的专属协议数据传输；
图5表示使用光转换光纤有线/无线通信系统的范例实施例的示意图，以允许根据一范例实施例在同级点装置之间的视频会议；
图6表示使用光转换光纤有线/无线通信系统的范例实施例的示意图，以根据一范例实施例通过共同存在的接入点允许在同级点装置之间的通信；
图7表示在光转换光纤有线/无线通信系统的HEU处的光转换触排的范例实施例的示意图；
图8表示使用光学放大及在光转换光纤有线/无线通信系统的HEU处分开以用于广播视频至同级点装置的范例实施例的示意图；
图9表示光转换光纤有线/无线通信系统的范例实施例的示意图，图9表示在两个不同位置的HEU与宽带转发器之间的范例连接；
图10表示宽带转发器的范例实施例的示意图，所述宽带转发器可用于光转换光纤有线/无线通信系统的范例实施例中；
图11表示光转换光纤有线/无线通信系统的HEU的范例实施例的示意图；及
图12表示基于无线电光纤的无线通信系统的范例实施例的示意图。
具体实施方式
以下将参考实施例，实施例的范例表示于随附图式中，其中表示一些但并非所有的实施例。事实上，这些概念可以许多不同的形式实现，不应被理解为限制，而是提供这些实施例以使本揭示案符合适用的法律规定。相同的元件符号是指相同的组件或部件。
本文所揭示实施例包括光转换光纤有线及/或无线通信系统和相关方法，以增加有线及/或无线同级点通信系统的范围。在一实施例中，光转换光纤有线及/或无线通信系统可包括具有光转换触排的头端单元(HEU)。多个光纤电缆，所述光纤电缆的每个包括至少一光纤且配置以将无线电光纤(RoF)信号从所述头端单元传递到多个远程接入点。所述远程接入点的第一接入点经配置以形成第一同级装置所位于的相应的第一蜂窝式覆盖区域。所述远程接入点的第二接入点经配置以形成第二同级装置所位于的相应的第二、不同的蜂窝式式覆盖区域。所述光转换触排经配置以通过所述光纤电缆的至少一个动态建立基于RoF的光链接，以使所述第一覆盖区域中的所述第一同级装置至少部分通过所述基于RoF的光链接与所述第二覆盖区域中的所述第二同级装置通信。通过结合光纤低损耗、高带宽特性与适当的光转换网络以提高覆盖区域(视需要)，这些系统和方法可以克服传统的有线/无线同级点通信的局限性。在一实施例中，光转换的光纤有线/无线通信系统是基于RoF的链接系统。在另一实施例中，基于RoF的链接系统几乎是协议透明的(即独立于协议)。
在讨论从图4开始有关光转换光纤有线及/或无线通信系统的范例实施例的细节之前，先讨论图1-3以描述基于光纤的无线微微蜂窝式系统。在这点上，图1表示基于光纤的无线微微蜂窝式系统10的范例实施例示意图(也称为“系统10”)。系统10包括头端单元(HEU)20、一或多个转发器或远程天线单元30(或称“远程单元30”及将HEU 20光耦合至远程单元30的光纤射频(RF)通信链接36。正如下文所详细讨论，系统10有微微蜂窝40，大致以远程单元30为中心。远程单元30形成微微蜂窝式覆盖区域44。HEU 20适于执行或促进任何射频光纤应用，如射频辨识(RFID)、无线局域网络(WLAN)通信、蓝芽或蜂窝式电话服务。微微蜂窝40内所示的是装置45。装置45可为手持通信装置(如蜂窝式电话或个人数字助理(PDA))、个人计算机、视频监控或有能力与同级装置通信的任何其它装置。装置45可能有与相关的天线46。
虽然本文所述的实施例包括任何类型的光转换光纤有线/无线通信系统(包括任何类型的RoF系统)，图2提供范例RoF分布式通信系统11，以方便讨论可使不同蜂窝中两个装置之间的同级点能够通信的环境。图2包括建立基础设施的部分示意图，所述基础设施通常代表于其中可利用和使用RoF分布式通信系统11的任何类型建筑物。建筑基础设施12包括第一层14、第二层16和第三层18。楼层14、16、18是通过主配线架22由HEU20服务，以在建筑基础设施12中提供覆盖区域24。为方便说明，图2中仅表示楼层14、16、18的天花板。
在一范例实施例中，HEU 20是位于基础设施12中，而在另一范例实施例中，HEU 20是位于建筑基础设施12的外部远程位置。基地收发站台(BTS)25(可由诸如移动电话服务供货商的第二方提供)连接到HEU 20，并可以设在同一地点或位于HEU 20的远程。在典型的蜂窝式系统，例如，多个基地收发站台是部署在多个远程位置，以提供无线电话的覆盖。每个基地收发站台提供了相应的蜂窝，当移动站进入蜂窝时，基地收发站台与移动站通信。每个基地收发站台包括至少一无线电收发器，用于使与在相关蜂窝内运作的一或多个订阅者单元能够通信。
主电缆26允许多个光纤电缆32分散于建筑基础设施12至远程单元30，以提供覆盖区域24给第一、第二和第三楼层14、16和18。每个远程单元30服务在覆盖区域24中各自的覆盖区域。主电缆26可包括上升电缆28，所述上升电缆28传递全部的上行链路和下行链路光纤电缆32往返HEU20。主电缆26可以包括一或多个多重电缆(MC)连接器，所述多重电缆(MC)连接器适于连接下行链路和上行链路至一些光纤电缆32。在此实施例，提供互连单元(ICU)34给每个楼层14、16、18，ICU 34包括光纤电缆端口的被动光纤互连。光纤电缆32可以包括相配的连接器。在范例实施例中，上升电缆28包括三十六(36)个下行链路光纤和三十六(36)个上行链路光纤，而六(6)个光纤电缆32的每个携带六(6)个下行链路光纤及六(6)个上行链路光纤以服务六(6)个远程单元30。每个光纤光缆32依次连接到多个远程单元30，多个远程单元30的每个具有天线以提供总覆盖区域24。
在这个例子中，通过从一或多个外部网络21传递(或调节然后传递)这些信号至覆盖区域24，HEU 20提供电力射频(RF)服务信号。HEU 20是电耦合到HEU 20内的电到光(E/O)转换器38，HEU 20从一或多个外部网络21接收电子RF服务信号，并将电子RF服务信号转换为相应的光学信号。光学信号通过上升电缆28传输至ICU 34。ICU 34包括光纤电缆端口的被动光纤互连，所述被动光纤互连通过光纤电缆32传递光学信号至远程单元30以提供覆盖区域24。在范例实施例中，E/O转换器38包括激光器，适合提供足够的动态范围用于RoF应用，E/O转换器38并可能包括电耦合至激光器的激光驱动器/放大器。适合E/O转换器38的激光器包括激光二极管、分布式反馈(DFB)激光器、FP激光器及垂直腔表面发射激光器(VCSEL)。
HEU 20适于执行或协助任何RoF应用，包括但不限于射频辨识装置(RFIDs)、无线局域网络(WLAN)通信、蓝芽及/或蜂窝式电话服务。在一特定范例实施例中，这包括提供WLAN信号分配，如IEEE 802.11标准所规定，即频率范围从2.4GHz至2.5GHz和从5.0GHz至6.0GHz。在另一例子中，HEU 20通过直接产生信号来提供电力RF服务信号。在另一例子中，HEU 20协调覆盖区域24内客户端装置之间的电力RF服务信号的传递。
可以变化光纤和光纤电缆32的数量，以适应不同的应用，包括增设第二、第三或更多的HEU 20。在这个例子中，RoF分布式通信系统11整合多个HEU 20以提供各类无线服务给覆盖区域24。HEU 20可以主/从安排来配置，其中一HEU 20是主，其它HEU 20是从。此外，根据所欲配置和所欲覆盖区域24蜂窝的数量，可提供一或多个HEU 20。
图3表示图1的基于光纤的微微蜂窝式系统10的范例实施例示意图。在这个范例实施例中，HEU 20包括服务单元50，所述服务单元50提供电力射频服务信号用于特定的无线服务或应用。如下所述，服务单元50通过从一或多个外部网络223传递(或调节然后传递)这些信号来提供电力射频服务信号。在一特定实施例，这可能包括提供范围为3.1GHz至10.6GHz的超宽带脉冲响应(ultra wide band-impulse response，UWB-IR)信号分配。其它信号分配也是可能的，包括IEEE 802.11标准规定的WLAN信号分配，即频率范围从2.4GHz到2.5GHz和5.0GHz到6.0GHz。在另一实施例中，服务单元50可通过直接产生信号来提供电力射频服务信号。
服务单元50电耦合到电/光转换器60，电/光转换器60从服务单元50接收电力射频服务信号并将电力射频服务信号转换为相应的光信号，这部分将进一步详细说明于后。在范例实施例中，E/O转换器60包括激光器60，激光器60适合提供足够的动态范围用于RF光纤应用，E/O转换器60并可能包括激光驱动器/放大器，包括激光驱动器/放大器电耦合至激光器。适合用于E/O转换器60的例子包括激光二极管、分布式反馈(DFB)激光器、FP激光器、垂直腔表面发射激光器(VCSEL)。
HEU 20还包括O/E转换器62，O/E转换器62电耦合到服务单元50。O/E转换器62接收光射频服务信号，并将光射频服务信号转换成相应的电子信号。在一实施例中，O/E转换器62是光检器或是电耦合到线性放大器的光检器。E/O转换器60和O/E转换器62构成“转换器对”66。
在范例实施例中，服务单元50包括射频信号调制器/解调器单元70，射频信号调制器/解调器单元70产生给定频率的RF载波，然后调制射频信号到载体。调制器/解调器单元70也解调收到的RF信号。服务单元50还包括数字信号处理单元(“数字信号处理器”)72、中央处理单元(CPU)74用于处理数据和执行逻辑和计算操作，及记忆单元76用于储存诸如系统设定、状态信息、RFID卷标信息的数据。在范例实施例中，与不同的信号信道相关的不同频率由调制器/解调器单元70所建立，调制器/解调器单元70根据CPU 74的指令而产生不同的射频载波频率。此外，正如下文所述，与特定的组合微微蜂窝相关的共同频率由产生相同的RF载波频率的调制器/解调器单元70所建立。
继续参照图3，在一实施例中，远程单元30包括转换器对66，其中E/O转换器60和O/E转换器62是通过射频信号指示元件106(例如循环器)电耦合到天线系统100。射频信号指示组件106旨在引导下行链路和上行链路电子射频服务信号，讨论如下。在范例实施例中，天线系统100包括整合至光纤数组电缆的宽带(3.1GHz至10.6GHz)天线。
远程单元30可能是典型的接入点装置，或典型的接入点装置的一部分。在一实施例中，远程单元30可能是典型的无线局域网络接入点。在另一实施例中，远程单元30可能是典型的宽带接入点，或超宽带(UWB)接入点。在另一实施例中，远程单元30可能是共存(包括WLAN和宽带UWB)的接入点。远程单元30可能是能够形成微微蜂窝或大致以远程单元30为中心的其它蜂窝式覆盖区域的任何装置，微微蜂窝式或其它蜂窝式覆盖区域内的装置可以与远程单元30通信。在进一步的实施例中，远程单元30与无线通信系统相关的典型接入点装置的不同之处在于远程单元30的优选实施例只有几个信号调节元件且不具数字信息处理能力。事实上，信息处理能力是位于远程的HEU 20中，在一特定例子中信息处理能力是在服务单元50中。这允许远程单元30非常紧凑且几乎是不用维护。此外，远程单元30的优选范例实施例功耗极低、对射频信号而言是透明的，且无需本地电源。
再次参考图3，光纤射频通信链接136的范例实施例包括具有下行链路光纤输入端138和下行链路光纤输出端140的下行链路光纤136D，及具有上行链路光纤输入端142和上行链路光纤输出端144的上行链路光纤136U。下行链路和上行链路光纤136D和136U将在HEU 20的转换器对66光耦合到在远程单元30的转换器对66。具体来说，下行链路光纤输入端138光耦合到HEU 20的E/O转换器60，而下行链路光纤输出端140光耦合到在远程单元30的O/E转换器62。类似地，上行链路光纤输入端142光耦合到在远程单元30的E/O转换器60，而上行链路光纤输出端144光耦合到在HEU 20的O/E转换器62。
在一实施例中，系统10采用已知的电信波长，如850nm、1300nm或1550nm。在另一范例实施例中，系统10利用其它不太常见但适当的波长，如980nm。
系统10的范例实施例包括单模光纤或多模光纤用于下行和上行链路光纤136D及136U。光纤的特定类型取决于系统10的应用。对于许多建筑内的部署应用，最大传输距离一般不超过300米。当考虑使用多模光纤于下行和上行链路光纤136D及136U时，需要考虑所欲射频光纤传输的最大长度。例如，已知1400MHz/km多模光纤带宽产品已足够用于高达300m的5.2GHz的传输。
在一实施例中，50μm的多模光纤是用于下行和上行链路光纤136D及136U，E/O转换器60使用指定用于10Gb/s数据传输的VCSEL在850nm运作。在一更具体的范例实施例中，OM3 50μm多模光纤是用于下行和上行链路光纤136D及136U。
系统10还包括电源供应160，电源供应160产生电功率信号162。电源供应160电耦合至HEU 20，用于供电其中的功率消耗元件。在一实施例中，电线168穿过HEU 20至远程单元30以供电给在转换器对66中的E/O转换器60和O/E转换器62，可选的射频信号指示元件106(除非可选的射频信号指示元件106是诸如循环器的被动装置)，以及任何其它耗电元件(未图示)。范例实施例中，电线168包括线路170和172，线路170和172承载单一电压且电耦合到在远程单元30的直流电源转换器180。直流电源转换器180电耦合到在远程单元30的E/O转换器60和O/E转换器62，并改变电力信号162的电压或电平为在远程单元30的耗电组件所要求的功率电平。在一实施例，取决于电线168所传递的电力信号162的类型，直流电源转换器180是DC/DC电源转换器或AC/DC电源转换器。范例实施例中，电线168包括标准的电力传递电线，如用于标准电信和其它应用的18-2AWG(美国线规)。在另一范例实施例中，电线168(图3虚线所示)从电源160直接到远程单元30，而不是从或通过HEU 20。在另一范例实施例中，电线168包括两个以上的电线并载有多个电压。
在另一实施例中，HEU 20通过网络连接224操作地耦合到外部网络223。
参考图1和图3的基于光纤的无线微微蜂窝式系统，服务单元50产生对应特定应用的电子下行射频服务信号SD(电子信号SD)。在一实施例中，这是通过数字信号处理器72来达成，数字信号处理器72提供调制到射频载波以产生所欲电子信号SD的电子信号(未图示)给调制器/解调器单元70。电子信号SD是由E/O转换器60所接收，E/O转换器60转换电子信号SD成相应的光学下行链路射频信号SD’(光学信号SD’)，然后将所述光学下行链路射频信号SD’耦合到在输入端138的下行链路光纤136D。应注意，在一实施例中，光信号SD’具有给定的调制索引。此外，在范例实施例中，控制E/O转换器60的调制电源(例如通过一或多个增益控制放大器(未图示))以变化来自天线系统100的发射功率。在范例实施例中，变化提供给天线系统100的电量，以定义相关微微蜂窝式40的大小，在范例实施例中，相关微微蜂窝式40的大小范围从约一米到约二十米。
光信号SD’经过下行链路光纤136D到输出端140，在此由远程单元30中的O/E转换器62所接收。O/E转换器62将光信号SD’转换回电信号SD，然后电信号SD会传播到射频信号指示元件106。射频信号指示元件106指示电信号SD到天线系统100。电信号SD会反馈到天线系统100，使天线系统100发射相应的电磁下行链路射频信号SD”(电磁信号SD”)。
当装置45是位于微微蜂窝40内时，由天线46接收电磁信号SD”。天线46将电磁信号SD”转换成装置45中的电子信号SD，并处理电子信号SD。装置45可产生电子上行链路射频信号SU，所述电子上行链路射频信号SU被天线46转换成电磁上行射频信号SU”(电磁信号SU”)。
当装置45是在微微蜂窝40内时，电磁信号SU”是由在远程单元30中的天线系统100所侦测到，天线系统100将电磁信号SU”转换回电子信号SU。电子信号SU由RF信号指示元件指示至在远程单元30中的E/O转换器，E/O转换器将此电子信号转换成相应的光学上行射频信号SU’(光学信号SU’)，然后所述光学上行射频信号SU’会被耦合至上行链路光纤136U的输入端142。光学信号SU’经过上行链路光纤136U到输出端144，在此由在HEU 20的O/E转换器62所接收。O/E转换器62将光学信号SU’转换回电子信号SU，然后将电子信号SU引导到服务单元50。服务单元50接收和处理电子信号SU，在一实施例中可包含一或多个以下步骤：储存信号信息；数字处理或调整信号；通过网络连接224将信号发送到一或多个外部网络；及发送信号到微微蜂窝式覆盖区域44中的一或多个装置45。在范例实施例中，电子信号SU的处理包括在调制器/解调器单元70中解调电子信号SU，然后在数字信号处理器72中处理解调信号。
图4-6说明独立于协议的RoF无线存在的三个实施例。所有这些实施例具有WLAN请求转换网络以发起独立于协议的同级点连接。
图4表示使用光转换光纤有线/无线通信系统的范例实施例的示意图，以允许根据一范例实施例在同级点装置之间的专属协议数据传输。在图4，同级装置202是位于不同于同级装置204的蜂窝式覆盖区域(蜂窝)。当同级装置202是在接入点208所定义的第一蜂窝内时，同级装置202可通过无线连接(由虚线表示)与接入点208通信。当同级装置204是在接入点210所定义的第二蜂窝内时，同级装置204可通过无线连接(由虚线表示)与接入点210通信。当接入点208和210可以是宽带接入点，或宽带转发器。在一实施例，接入点208和210可以类似于图3的远程单元30，其中远程单元30包括转换器对66，其中E/O转换器60和O/E转换器62是通过诸如循环器的射频信号指示元件106电耦合到天线系统100。
接入点208和210通过光纤电缆中的光纤而光耦合到HEU 20(以接入点208和210与HEU 20之间的实线代表)。在一实施例中，光纤可以类似于图2及/或3所示的方式而将接入点208和210连接至HEU 20。图4表示使用不同于同级装置202的装置200(如PDA或移动电话)来请求同级点交换。装置200发送同级点请求到WLAN接入点206(如虚线所示)。WLAN接入点206通过光纤电缆中的光纤而光耦合到HEU 20(以WLAN接入点206与HEU 20之间的实线代表)，使得同级点请求从WLAN接入点206发送至HEU 20。
当HEU 20接收同级点请求时，光转换触排212动态选择合适的光纤以连接接入点208和210，以使与接入点208和210相关的同级装置202和204可与对方通信。一旦光转换触排212动态选择合适的光纤以连接接入点208和210，同级装置202可使用同级装置202和接入点208可使用的任何协议而与接入点208无线连接，同级装置204可使用同级装置204和接入点210可使用的任何协议而与接入点210无线连接。在这种方式下，通过建立两个不同蜂窝的接入点208和210之间的动态光链接的光转换触排212，使用不同的无线协议，可使不同蜂窝中的同级装置202和204之间的同级点能够通信。
此情境可用于医疗应用，如医院或其它医疗机构，使用PDA的医生可要求将储存在远程专属装置上的高分辨率影像(X光、MRI等)显示于床头基于专属协议的监视器。例如，同级装置202可具有储存有X射线数据的计算机于医院的记录区域。通过使用图4所示的系统，来自同级装置202的数据可传送到同级装置204，同级装置204可为病房内的计算机终端或其它监视器或显示器，且是在与同级装置202所处的记录室的不同楼层。
图5表示使用光转换光纤有线/无线通信系统的范例实施例的示意图，以允许根据一范例实施例在同级点装置之间的视频会议。图5中，同级装置302是位于与同级装置304的不同蜂窝中。当同级装置302是在接入点308所定义的第一蜂窝中时，同级装置302可通过无线连接(由虚线表示)与同级点308通信。当同级装置304是在接入点310所定义的第二蜂窝中时，同级装置304可通过无线连接(由虚线表示)与接入点点310通信。接入点308和310可能是宽带接入点或宽带转发器。在一实施例中，接入点308和310可能类似于图3所述的远程单元30，其中远程单元30包括转换器对66，其中E/O转换器60和O/E转换器62是通过诸如循环器的射频信号指示元件106而电耦合到天线系统100。
接入点308和310是通过在光纤电缆中的光纤(以接入点308和310与HEU 20之间的实线代表)光耦合到HEU 20。在一实施例中，光纤可以类似于图2及/或图3所示的方式将接入点308和310连接至HEU 20。图5所示的范例系统与图4所示的范例系统类似。图5与图4所示的情境的不同之处在同级装置302或304的一个发起连接，而非请求不同的装置(如PDA)。这适用于同级装置302和304都具有无线局域网络接入和宽带无线(可能是专属协议)网络且想要参与视频会议的情况下。因此，在一实施例中，同级装置302和304可为计算装置(如笔记型计算机)，接入点308和310可为宽带接入点，接入点306和314可为无线局域网络接入点。例如，图5的实施例可以通过允许笔记型计算机将同级点连接的请求置于低数据速率的网络而利用对于视频应用程序而言为不足的现有低数据速率无线局域网络(如802.11b)，并通过基于无线/UWB USB的同级点宽带较高数据速率网络来传输视频信息。因此，在图5中，同级装置302或304之一发起同级点通信的请求。同级装置302发送通信请求到无线局域网络接入点306，或是同级装置304发送通信请求到无线局域网络接入点314(如细虚线所示)。无线局域网络接入点306和314通过在光纤光缆中的光纤而光耦合到HEU 20(以无线局域网络接入点306与HEU 20及无线局域网络接入点314与HEU 20之间的实线表示)，使得同级点请求是从无线局域网络接入点306或无线局域网络接入点314发送至HEU 20。
当HEU 20接收同级点请求时，光转换触排312动态选择合适的光纤以连接接入点308和310，使得与接入点308和310相关的同级装置302和304可以互相通信。一旦光转换触排312动态选择合适的光纤以连接接入点308和310，同级装置302可使用同级装置302和接入点308可使用的任何协议而与接入点308无线连接，同级装置304可使用同级装置304和接入点310可使用的任何协议而与接入点310无线连接。在这种方式下，通过建立两个不同蜂窝的接入点308和310之间的动态光链接的光转换触排312，使用不同的无线协议，可使不同蜂窝中的同级装置302和304之间的同级点能够通信。
图6表示使用光转换光纤有线/无线通信系统的范例实施例的示意图，以根据一范例实施例通过共同存在的接入点允许在同级点装置之间的通信。图6中，同级装置402是位于与同级装置404的不同蜂窝中。当同级装置402是在接入点408所定义的第一蜂窝中时，同级装置402可通过无线连接(由左边的细虚线表示)与同级点408通信。当同级装置404是在接入点410所定义的第二蜂窝中时，同级装置404可通过无线连接(由右边的细虚线表示)与同级点410通信。接入点408和410可为共存的接入点。在一实施例中，接入点408和410可能同时有无线局域网络和宽带(如宽带UWB)的能力。接入点408和410是通过在光纤电缆中的光纤(以接入点408和410与HEU 20之间的实线代表)光耦合到HEU 20。在接入点408是共存的接入点的实施例中，过滤器409可用于分开宽带信号(例如2.4兆赫的信号)与无线局域网络信号(如802.11信号)，无线局域网络信号可通过光纤电缆从共存接入点408接收。在接入点410是共存接入点的实施例中，过滤器411可用于分开宽带信号(例如2.4兆赫的信号)与无线局域网络信号(如802.11信号)，无线局域网络信号可通过光纤电缆从共存接入点410接收。在一实施例中，基于接收自同级装置402和404的信号频率，HEU 20自动决定同级装置402和404之间的通信是可能的。在一实施例中，HEU 20可感测从同级装置402和404接收的信号的无线电频带内容，其中一个同级装置位于一个蜂窝中。通过经由基于RoF的光纤链接，使用光转换触排412以连接具有共同无线电频段的蜂窝，HEU 20可自动决定转换配置。这种自动连接不需要来自同级装置402或404的一个或第三装置的请求。在一实施例中，光纤可以类似于图2及/或图3所示的方式而将接入点408和410连接至HEU 20。图6与图4和图5所示的范例系统类似。图6与图5所示的情境的不同之处在于仅使用具有共存能力的网络来代替两个个别的网络，且可从WLAN信号过滤出宽带信号。例如，图5所示的视频会议应用范例也适用于图6。
当HEU 20通过接入点408或410自同级装置402或404接收同级点请求时，转换触排412动态选择合适的光纤以连接接入点408和410，以使与接入点408和410相关的同级装置402和404可以互相通信。一旦转换触排412动态选择合适的光纤以连接接入点408和410，同级装置402可独立于协议而与接入点408无线通信。在这种方式下，在不同蜂窝中使用不同无线协议的同级装置402与404之间的同级通信是通过转换触排412而得以进行，其中转换触排412建立两个不同蜂窝的接入点408与410之间的动态光链接。
图7表示在光转换光纤有线/无线通信系统的HEU处的光转换触排的范例实施例的示意图。在图7中，光纤电缆702-1到702-n及704-1到704-n将HEU 20光耦合至N个同级装置的接入点。例如，光纤电缆702-1将HEU20光耦合至同级装置1的接入点，光纤电缆704-n将HEU 20光耦合至同级装置N的接入点。在一实施例，光纤电缆702-1到702-n及704-1到704-n的每个具有传输光纤和接收光纤。例如，光纤电缆702-1具有光传输光纤702t和光接收光纤702r，光纤电缆704-n具有光传输光纤704t和光接收光纤704r。因此，图7说明当同级装置1请求与同级装置N通信时是如何在HEU 20处接收请求，通过将与同级装置1相关的光传输光纤702t和光接收光纤702r耦合至与同级装置N相关的光接收光纤704r和光传输光纤704t，光转换触排712将动态链接同级装置1与同级装置N所位于的两个蜂窝。在一实施例中，HEU 20可包括光放大器706。在一实施例中，当期望能够使大于300米的同级装置之间能够通信时，可加入光放大器706。
图8表示使用光学放大及在光转换光纤有线/无线通信系统的HEU处分开以用于广播视频至同级点装置的范例实施例的示意图。在图8中，传入光纤电缆802将提供视频源(未图示)的装置耦合至HEU 20。在一实施例中，光纤电缆802可包括光传输光纤802t和光接收光纤802r。图8的HEU20包括视频广播单元806，视频广播单元806将自光传输光纤802t传入的视频分开为多个传出光纤电缆804-1至804-n，多个传出光纤电缆804-1至804-n的每个可光耦合到同级装置。每个光纤电缆804-1至804-n具有传送和接收光纤。例如，光纤电缆804-1具有光传输光纤804-1t及光接收光纤804-1r，光纤电缆804-n具有光传输光纤804-nt和光接收光纤804nr。因此，图8说明光耦合到视频源的HEU 20可经由光纤播放视频(如高清晰度(HD)电视(HDTV)、视频会议等)到不同位置的多个同级装置。在一实施例中，视频广播单元806也可提供视频信号的放大。注意到，在图8某些视频广播的实施例中，并不是需要使用所有的光传输和接收光纤。例如，在使用图8的实施例广播视频信号时，不一定要使用光纤电缆802的光传输光纤802t以及光传输光纤804-lt至804-nt。
图9表示光转换光纤有线/无线通信系统的范例实施例的示意图，图9表示在两个不同位置的HEU与宽带转发器之间的范例连接。在图9，HEU 20光耦合到可能在不同的蜂窝式覆盖区域的宽带转发器906和914。宽带转发器906和914的每个通过光纤电缆900而光耦合到HEU 20，光纤电缆900具有电源线902和一或多个光纤904。宽带转发器906具有射频输入/输出908，在一实施例中，射频输入/输出908可为射频天线、DC输入/输出910和光纤输入/输出912。宽带转发器914具有射频输入/输出916，在一实施例中，射频输入/输出916可为射频天线、DC输入/输出918和光纤输入/输出920。
图10表示宽带转发器的范例实施例的示意图，宽带转发器可用于光转换光纤有线/无线通信系统的范例实施例中。图10表示图9宽带转发器914的具有更多内部细节的实施例。图9的宽带转发器906可能类似于宽带转发器914。具有电线902和光纤904的光纤电缆900将宽带转发器914光耦合至HEU 20(如图9所示)。宽带转发器914可以具有射频输入/输出916In和916Out，在一实施例中，射频输入/输出916In和916Out可为射频天线、DC输入/输出918和光纤输入/输出920In和920Out。在一实施例中，宽带转发器914可能还包括激光二极管922、光探测器924、转换阻抗放大器926。在一实施例中，光转换器905和907使在射频输入/输出916In和916Out与光纤输入/输出920In和920Out之间选择。
图11表示光转换光纤有线/无线通信系统的HEU的范例实施例的示意图。图11表示范例HEU的细节，范例HEU可使在N个蜂窝式覆盖区域中的同级装置之间的通信。图11所示的HEU 20可用于图5所示的光转换光纤有线/无线通信系统的范例实施例。图11所示的HEU 20包括同级点请求处理器1100和光转换触排1102。同级点请求处理器1100处理自同级装置接收的通信请求。同级点请求处理器1100和光转换触排1102能够提供不同蜂窝式覆盖区域内独立于协议的同级装置之间的高带宽同级点连接。HEU20可以通过光纤1104接收或发送信号到外部网络。传送光纤1110和接收光纤1112将HEU 20光耦合到WLAN接入点或转发器用于在第一蜂窝式覆盖区域的第一同级装置。E/O转换单元1106和O/E转换单元1108提供任何必要的E/O或O/E转换。接收光纤1114和传输光纤1116将HEU 20光耦合到宽带接入点或转发器用于第一同级装置。接收光纤1118和传送光纤1120将HEU 20光耦合到宽带接入点或转发器用于在第二蜂窝式覆盖区域的第二同级装置。接收光纤1126和传送光纤1128将HEU 20光耦合到WLAN接入点或转发器用于第二同级装置。O/E转换单元1122和E/O转换单元1124提供任何必要的E/O或O/E转换。可以理解，如果有多于两个的同级装置，可以有额外的光纤集合。
图12表示基于无线电光纤的无线现有通信系统的范例实施例的示意图。图12图示如何执行基于RoF的无线现有通信系统的一个实施例。多个同级装置1202、1204、1206、1208、1210、1212和1214的每个是在不同的蜂窝式覆盖区域。所述多个同级装置可能是在建筑物中的不同房间内，甚至是在建筑物的不同楼层。在一实施例中，多个同级装置1202、1204、1206、1208、1210、1212和1214的每个是位于能够通过宽带转发器和无线转发器进行无线通信的位置，如WLAN、WiMAX和蜂窝式转发器。例如，同级装置1202是位于由宽带转发器1202B定义的蜂窝式覆盖区域，无线转发器1202W是位于同级装置1202能够通过宽带转发器1202B和无线转发器1202W进行无线通信的位置。其它同级装置1204、1206、1208、1210、1212和1214的每个亦与宽带转发器和无线局域网络转发器相关，使得其它同级装置1204、1206、1208、1210、1212和1214的每个可通过宽带转发器和无线转发器进行无线通信。实线表示典型的RoF无线部署，虚线表示使用光转换光纤有线/无线通信系统通过近于协议透明的RoF技术的同级点光纤连接。典型的RoF无线部署通过光纤1200连接各个房间或蜂窝至外部网络，而光转换光纤有线/无线通信系统(如虚线所示)允许房间与房间或蜂窝与蜂窝的不同蜂窝式覆盖区域中装置之间的通信，或在相同蜂窝式覆盖区域中使用不同通信协议的装置之间。
因此，通过使用光转换RoF有线/无线通信系统，可增加同级点通信系统的通信覆盖范围。通过使用HEU中的光转换触排以设立两个不同蜂窝中的转发器之间的动态链接，两个不同蜂窝中的装置可以经由HEU通过光纤互相通信。通过结合光纤低损耗、高带宽的特性与适当的光转换网络，此系统克服传统有线/无线同级点通信的局限，以提高覆盖区域(在需要之处)。通过利用光转换光纤有线/无线通信系统的光纤电缆结构(如RoF WLAN微微蜂窝式系统)，同级点通信范围当延长至蜂窝与蜂窝之间。这意味着在任何两个蜂窝中的装置可独立于各自的实体距离而在同级点模式进行通信，使得同级点范围扩展到整个室内安装区域。此外，光转换光纤有线/无线通信系统使用近乎透明于无线协议的光缆链接，因此不需要专属协议规范要求。
此外，本文使用的术语“光纤电缆”及/或“光纤”包括所有类型的单一模式及多模式光波导，包括一或多个光纤，光纤在电缆中可为无镀膜、有色、缓冲、带状及/或具有其它组织或保护结构，如一或多个管、强度构件、护套或类似物。类似地，其它类型的合适光纤包括弯曲不敏感光纤或任何其它适宜用于传输光信号的媒体。弯曲不敏感光纤的一例是康宁公司市售的的多模光纤。

Claims (19)

1.一种基于光纤的无线通信系统，包括：
头端单元HEU，具有光转换触排；及
多个光纤电缆，其中所述多个光纤电缆的每个包括至少一光纤且每个光纤电缆经配置以将无线电光纤RoF信号从所述头端单元HEU传递到多个远程接入点，其中所述多个远程接入点的第一接入点经配置以形成相应的第一覆盖区域，所述多个远程接入点的第二接入点经配置以形成相应的不同的第二覆盖区域，
其中所述光转换触排经配置以通过所述多个光纤电缆的至少一个动态建立基于无线电光纤RoF的光链接，以使所述相应的第一覆盖区域中的第一同级装置至少部分通过所述基于无线电光纤RoF的光链接与所述相应的不同的第二覆盖区域中的第二同级装置通信；
其中所述头端单元HEU还配置以从所述第一和第二同级装置的第一装置接收请求，以通过与所述第一和第二同级装置的至少一个相关的至少一无线局域网络WLAN接入点而与所述第一和第二同级装置的第二装置进行通信。
2.如权利要求1所述的基于光纤的无线通信系统，其中所述多个远程接入点的所述第一接入点经配置以与所述第一同级装置无线通信；及
所述多个远程接入点的所述第二接入点经配置以与所述第二同级装置无线通信。
3.如权利要求1所述的基于光纤的无线通信系统，其中所述多个远程接入点的所述第一接入点和第二接入点是宽带接入点。
4.如权利要求1所述的基于光纤的无线通信系统，其中当在所述HEU接收的来自所述相应的第一覆盖区域中的所述第一同级装置的信号与接收自所述相应的不同的第二覆盖区域中的所述第二同级装置的信号具有共同的射频时，所述HEU还配置以自动建立所述第一覆盖区域与所述第二覆盖区域之间的所述基于RoF的光链接。
5.如权利要求1所述的基于光纤的无线通信系统，其中所述HEU通过包括至少一光纤的光纤电缆而光耦合到所述至少一无线局域网络接入点。
6.如权利要求1所述的基于光纤的无线通信系统，其中所述多个远程接入点的所述第一接入点和第二接入点的至少一个是共存接入点，所述共存接入点经配置以通过无线局域网络WLAN和宽带信号进行通信。
7.如权利要求6所述的基于光纤的无线通信系统，其中所述共存接入点系通过包括至少一光纤的光纤电缆而光耦合到所述HEU。
8.如权利要求1所述的基于光纤的无线通信系统，其中所述至少一无线局域网络WLAN接入点进一步经配置以接收来自除了所述第一和第二同级装置之外的装置的请求，以建立所述第一和第二同级装置之间的通信。
9.如权利要求1所述的基于光纤的无线通信系统，其中所述多个远程接入点的所述第一接入点经配置以与所述第一同级装置无线通信，所述第一同级装置使用不同于所述多个远程接入点的所述第二接入点所使用的协议的无线通信协议以与所述第二同级装置无线通信。
10.如权利要求9所述的基于光纤的无线通信系统，其中由所述多个远程接入点的所述第一或第二接入点所使用以与所述第一或第二同级装置进行无线通信的至少一无线通信协议是专属无线通信协议。
11.如权利要求1所述的基于光纤的无线通信系统，其中所述HEU还包括视频广播单元，所述视频广播单元经配置以通过包括至少一光纤的多个光纤电缆将在所述HEU处所接收的视频信号分散至多个装置。
12.如权利要求1所述的基于光纤的无线通信系统，其中所述多个远程接入点的至少一个还包括射频RF输入/输出、DC输入/输出以及光学输入/输出的至少一个。
13.一种使在第一覆盖区域中的第一同级装置与在不同的第二覆盖区域中的第二同级装置之间能够通信的方法，所述方法包括以下步骤：
通过多个光纤电缆，将多个远程接入点光连接至头端单元HEU，所述多个光纤电缆的每个包括至少一光纤并且每个光纤电缆经配置以从所述头端单元HEU传递无线电光纤RoF信号至多个远程接入点；
形成与所述多个远程接入点的第一接入点相关的第一覆盖区域；
形成与所述多个远程接入点的第二接入点相关但不同于所述第一覆盖区域的第二覆盖区域；
通过所述多个光纤电缆的至少一个，动态建立基于无线电光纤RoF的光链接，以允许所述第一同级装置至少部分通过所述基于无线电光纤RoF的光链接与所述第二同级装置通信；及
从不同于所述第一和第二同级装置的一个的装置接收请求，以建立所述第一同级装置与所述第二同级装置间的通信。
14.如权利要求13所述的方法，所述方法还包括以下步骤：所述多个远程接入点的所述第一接入点与所述第一同级装置进行无线通信，及所述多个远程接入点的所述第二接入点与所述第二同级装置进行无线通信。
15.如权利要求13或14所述的方法，所述方法包括以下步骤：从所述第一和第二同级装置的一个接收请求，以建立所述第一同级装置与所述第二同级装置间的通信。
16.如权利要求13所述的方法，所述方法还包括以下步骤：
感测自所述第一覆盖区域中的所述第一同级装置接收的至少一信号的射频及自所述第二覆盖区域中的所述第二同级装置接收的至少一信号的射频；及
当自所述第一覆盖区域中的所述第一同级装置接收的至少一信号的所述射频与自所述第二覆盖区域中的所述第二同级装置接收的至少一信号的所述射频是共同的射频时，自动建立所述第一覆盖区域与所述第二覆盖区域之间的所述基于RoF的光链接。
17.如权利要求13所述的方法，所述方法还包括以下步骤：在通过包括至少一光纤的光纤电缆而光耦合到所述HEU的无线局域网络WLAN接入点接收请求，以建立所述第一同级装置与所述第二同级装置之间的通信。
18.一种在基于光纤的无线通信系统中的头端单元HEU，包括：
光转换触排；及
多个端口，经配置以接收多个光纤电缆，所述多个光纤电缆的每个包括至少一光纤且每个光纤电缆经配置以将无线电光纤RoF信号从所述头端单元HEU传递到多个远程接入点，其中所述多个远程接入点的第一接入点经配置以形成第一同级装置所位于的相应的第一蜂窝式覆盖区域，所述多个远程接入点的第二接入点经配置以形成第二同级装置所位于的相应的不同的第二蜂窝式覆盖区域，
其中所述光转换触排经配置以响应于接收来自除了所述第一同级装置与所述第二同级装置之外的装置的同级点通信的请求而通过所述多个光纤电缆的至少一个动态建立在所述第一同级装置和所述第二同级装置之间基于无线电光纤RoF的光链接，
其中所述第一同级装置至少部分通过所述基于无线电光纤RoF的光链接与所述第二同级装置通信。
19.如权利要求18所述的HEU，还包括处理器，所述处理器经配置以处理所述来自除了所述第一同级装置与所述第二同级装置之外的装置的同级点通信的请求，其中所述光转换触排还包括至少一光放大器。
CN201080055264.7A 2009-11-13 2010-10-27 用于协议独立的有线及/或无线通信的无线电光纤(rof)系统 Expired - Fee Related CN102668417B (zh)

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US20160099779A1 (en) 2016-04-07
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US8280259B2 (en) 2012-10-02
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US20120321305A1 (en) 2012-12-20
US8639121B2 (en) 2014-01-28
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US9485022B2 (en) 2016-11-01
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US20110116794A1 (en) 2011-05-19
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