Interface Method Between Remote Radio Unit And Centralized Transceiver Station
First Claim
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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Abstract
The present invention discloses a method for transmitting signal between a central channel processing Main Unit (MU) and one or more Remote Radio Units (RRUs) by using SDH/OTN in Centralized Base Transceiver Station system using remote radio head (RRH) technology. The method includes: 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 GFP and transmitting it on SDH/OTN; and carrying the control signaling of the control plane on UDP/IP and/or TCP/IP, and further carrying IP packet on PPP and forming it into a frame by HDLC, transmitting the HDLC frame including the control plane signaling on the SDH/OTN via the control character channel of the GFP frame. According to the present invention, the existing SDH/OTN transmission network is utilized directly, which further reduces the management and maintenance operation needed for signal transmission, as well as networking cost.
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Citations
14 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification