Interface method for long-distance radio frequency unit and centralized base station

Abstract

The present invention disclosed a method for transmitting signal between MU and one or multi of RRU using SDH / OTN in centralized BS system of employing RF unit the method comprises: dividing the communication interface between MU and RRU into user plane and control plane, in which the user plane mainly bearing I / Q sampling data about the user data, and the control plane mainly bearing data about the control signaling; through I / Q data frame adapting layer that the I / Q sampling data about the user data that the user plane bearing is formed I / Q data frame, then through GFP frame make frame and transmitting on the SDH / OTN; and bearing the control signaling of the control plane on the UDP / IP and / or TCP / IP, further bearing the IP packet on PPP and make frame by HDLC, through control symbol channel of the GFP frame transmitting the HDLC frame that includes control signaling on the SDH / OTN. According to the present invention, since directly utilizing the existing SDH / OTN transmitting network, operation of management and maintenance of transmitting signal are reduced further, and cost of network establish is reduced at the same time.

Description

technical field [0001] The invention relates to base station technology in a mobile communication system, in particular to an interface method between a remote radio frequency unit and a centralized wireless base station in a centralized base station system using radio frequency units. Background technique [0002] 1. Centralized base station and wireless signal transmission [0003] In a mobile communication system, a radio access network typically consists of a base station (BTS) and a base station controller (BSC) or radio network controller (RNC) for controlling multiple base stations, as shown in Figure 1A, where the base station It is mainly composed of baseband processing subsystem, radio frequency (RF) subsystem, antenna and other units, responsible for the transmission, reception and processing of wireless signals. A base station can cover different cells through multiple antennas, as shown in Figure 1B. [0004] In the mobile communication system, there are wirele...

AI Technical Summary

Problems solved by technology

GFP is divided into frame mapping GFP (GFP-F) that supports PDU (protocol data unit) type and transparent GFP (GFP-T) that supports block coding type, where GFP-F can be used for IP / PPP (Internet Protocol / Point-to-Point Protocol), MPLS (Multi-Protocol Label Switching) and Ethernet MAC (Media Access Control) and other protocol packet adaptation, GFP-T is used to directly adapt to the block coded character stream of lines such as Gigabit Ethernet, therefore, It can meet the requirements of some applications with very small delay requirements, but the utilization rate of transmission bandwidth is lower than that of GFP-F

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