A downlink and uplink data transmission method and device

Abstract

The invention discloses a downlink and uplink data transmission method and device, which are used for flexibly remote buffering the baseband data of the cell according to the length of the optical fiber and the cell system, so as to realize that the transmission position of the baseband data of the cell in the optical fiber is not limited. The transmission capacity of the optical fiber can be reasonably utilized. The downlink data transmission method includes: when the remote radio unit RRU receives the baseband data of multiple cells on the same optical fiber, storing the baseband data of the multiple cells in a pre-configured storage space; The baseband data of each cell in the baseband data of the plurality of cells, when the preset time arrives, the RRU reads the baseband data of the cell from the storage space, and stores the read baseband data of the cell sent to the user equipment in the cell, wherein the time difference between the preset time and the time when the baseband data of the cell is stored is equal to the remote compensation time of the cell.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a downlink and uplink data transmission method and device. Background technique [0002] The base station equipment used by China Mobile's third-generation mobile communication technology (3rd-Generation, 3G) and fourth-generation mobile communication technology (the4th Generation mobile communication technology, 4G) adopts a distributed structure, consisting of a baseband processing unit (Building Base band Unit, BBU) and a remote radio unit (Radio Remote Unit, RRU). The BBU and the RRU are connected through one or two pairs of optical fibers, and the data transmission follows the IR interface (Interface between the RRU and the BBU) protocol. The baseband processing module of the RRU Field Programmable Gate Array (Field Programmable GateArray, FPGA) is located between the IR interface module and the intermediate frequency processing module, and the mapping relati...

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Problems solved by technology

[0023] To sum up, in the existing two ways of performing remote buffering for the baseband data of the community, the length of the optical fiber is inconsistent, and the baseband data of the community is required to be divided into optical fibers for remote buffering; the system of the community is different, and the baseband data of the community is required to be separated Remote buffering in the cell, neither of the two methods can flexibly perform remote buffering according to the length of the fiber and the standard of the cell, and thus limit the transmission position of the baseband data of the cell in the fiber, and the transmission capacity of the fiber cannot be reasonably utilized

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