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Method for sharing optical fiber for cloud-based wired and wireless access network, and system and apparatus for same

  • US 9,596,048 B2
  • Filed: 09/26/2012
  • Issued: 03/14/2017
  • Est. Priority Date: 09/26/2011
  • Status: Active Grant
First Claim
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1. A system for delivering uplink signals and downlink signals between a plurality of donor units and a plurality of remote units in cloud-based radio access network (C-RAN), the system comprising:

  • a centralization device connected to the plurality of donor units; and

    a plurality of distribution devices, each distribution device connected to a respective subset of the plurality of remote units,wherein the centralization device and the plurality of distribution devices are interconnected through optical fibers forming an optical ring network,wherein the centralization device is configured toreceive a plurality of downlink signals from the plurality of donor units andoptically transmit the plurality of downlink signals to the plurality of distribution devices at respective wavelengths assigned to the each distribution devices, andsaid each distribution device is configured toreceive a plurality of uplink signals from the respective subset of the plurality of remote units andoptically transmit the plurality of uplink signals to the centralization device at the assigned wavelengths, andwherein the plurality of donor units includes a plurality of wireless donor units and a plurality of wired donor units, andthe plurality of remote units include a plurality of wireless remote units and a plurality of wired remote units,wherein the centralization device comprisesa first transmission rate converter configured toreceive downlink signals from a part of the plurality of donor units at low transmission rate,process the received downlink signals to generate summing signals, each summing signal carrying at least two downlink signals, andconvert summing signals at different wavelengths to generate optical summing signals at high transmission rate,wherein the first transmission rate converter comprisesa first wireless transmission rate converter configured toreceive downlink signals from a part of the plurality of wireless donor units, andprocess the received downlink signals to generate summing signals, andconvert the summing signals at different wavelengths to generate optical summing signals, anda first wired transmission rate converter configured toreceive downlink signals from a part of the plurality of wired donor units,process the received downlink signals to generate summing signals, andconvert the summing signals at different wavelengths to generate optical summing signals.

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