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Interface Method Between Remote Radio Unit And Centralized Transceiver Station

  • US 20080199183A1
  • Filed: 07/13/2004
  • Published: 08/21/2008
  • Est. Priority Date: 07/13/2004
  • Status: Active Grant
First Claim
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1. A method for transmitting signal between a central channel processing Main Unit (MU) and one or more Remote Radio Units (RRUs) in Centralized Base Transceiver Station system using remote radio head (RRH) technology, wherein the transmission channel between the central channel processing Main Unit (MU) and the one or more RRUs uses Synchronous Digital Hierarchy (SDH)/Optical Transmission Network (OTN), the method comprising:

  • dividing the communication interface between the MU and the RRUs into a user plane and a control plane, the user plane mainly for carrying I/Q sampling data concerning the user data, and the control plane mainly for carrying the data concerning control signaling;

    forming the I/Q sampling data concerning the user data carried by the user plane into an I/Q data frame via an I/Q data frame adaptation layer, then forming the I/Q data frame into a GFP frame via Generic Framing Procedure (GFP) and transmitting it on SDH/OTN; and

    carrying the control signaling of the control plane on User Data Protocol (UDP)/Internet Protocol (IP) and/or Transmission Control Protocol (TCP)/Internet Protocol (IP), and further carrying IP packet on Point to Point Protocol (PPP) and forming it into a frame by High-Level Data Link Control (HDLC), transmitting the HDLC frame including the control plane signaling on the SDH/OTN via control character channel of the GFP frame.

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