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Method for signaling cascade for radio frequency zooming unit

A radio frequency remote unit and signaling technology, applied in the direction of electrical components, wireless communication, wireless network protocol, etc., to achieve the effect of convenient and reliable communication

Active Publication Date: 2009-05-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently there is no better signaling cascading method

Method used

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  • Method for signaling cascade for radio frequency zooming unit
  • Method for signaling cascade for radio frequency zooming unit
  • Method for signaling cascade for radio frequency zooming unit

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] figure 1 Shown is the RRU cascade connection topology diagram of the present invention.

[0031] The present invention uses a large-scale field programmable gate array device (FPGA) to realize RRU cascading. Among them, the FPGA includes FIFO, dual-port RAM, serial-to-parallel conversion module, time-division multiplexing module, and registers.

[0032] Cascade forwarding includes two directions, namely downlink and uplink. Downlink refers to the data flow from BBU to RRU or from the current level RRU to the subsequent level RRU, such as figure 1 From RRU0 to RRU1 shown in ; uplink refers to the data flow from RRU to BBU or from the RRU of the subsequent stage to the RRU of the previous stage, such as figure 1 Shown from RRU1 to RRU0. Up and down directions such as figure 2 indicated by the dotted line.

[0033] In the embodiment of the present invention, the signaling between the BBU and the RRU includes the following three types:

[0034] 1) Shared signaling: s...

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Abstract

The invention provides a method for RRU signaling cascade, wherein a BBU is cascaded with a plurality of RRUs, downlink is that a signaling reaches an RRU from a BBU or reaches the next RRU from the RRU, and uplink is that a signaling reaches the BBU from the RRU or reaches the previous RRU from the RRU. The method is characterized by comprising the following steps: (a) a signaling between the BBU and the RRU is framed according to a specified format; (b) a downlink signaling is extracted and transmitted, in which the RRU extracts the signaling from a data frame according to the specified frame format after receiving a downlink data frame; and the RRU transmits the signaling correlated to the RRU cascade position after processing the signaling, and other signalings are directly transmitted; and (c) an uplink signaling is inserted and transmitted, in which inserting and transmitting of the signaling are performed by adopting a time sharing multiplex method when the uplink signaling is in down link; when the RRU belongs to the frame of the level, the signaling is sent; and when the RRU does not belong to the frame of the level, a signaling sent by the next RRU is transmitted.

Description

technical field [0001] The present invention relates to a method for cascade transmission of base station (Node B) remote radio unit (RRU) signaling, in particular to the fields of TD-SCDMA (Time Division Synchronous Code Division Multiple Access) and WCDMA (Wideband Code Division Multiple Access) A method for signaling cascade transmission of remote radio unit of NODE B. Background technique [0002] TD-SCDMA or WCDMA system consists of four parts: base station, radio network controller (RNC), core network (CN) and mobile terminal (UE). With the development of wireless radio frequency technology, the development of the base station tends to separate the baseband signal processing and the intermediate radio frequency processing, and the intermediate radio frequency part is pulled away through the optical fiber. In the base station, the main control part and baseband processing part are called BBU (Base Band Unit, baseband pool unit), and the digital intermediate frequency p...

Claims

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Application Information

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IPC IPC(8): H04W88/08H04W80/02
Inventor 吴俊吴少华
Owner ZTE CORP
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