Millimeter wave base station RLC layer data transmission method and device

Abstract

The embodiment of the invention provides a millimeter wave base station RLC (Radio Link Control) layer data transmission method and device. The method comprises the following steps: receiving a PDCP (Packet Data Convergence Protocol) data packet of each radio bearer sent by a PDCP layer; for the received PDCP data packet, adding a packet header according to a radio bearer to which the PDCP data packet belongs, and caching the PDCP data packet to which the packet header is added in parallel to a plurality of preset circular buffers; and in response to a media access control (MAC) layer to allocate a transmission block, determining a target circular buffer from the plurality of circular buffers, and acquiring a plurality of PDCP data packets from the target circular buffer and copying the PDCP data packets to the transmission block. By setting a plurality of circular buffers, the PDCP data packets of a plurality of radio bearers can be cached in parallel, more PDCP data packets in the circular buffers can be copied to the transmission block at one time, and the data copying times can be greatly reduced, so that the time consumption is reduced, and the RLC layer data transmission efficiency is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for transmitting RLC layer data of a millimeter wave base station. Background technique [0002] In the 5G millimeter wave communication system, due to the larger transmission bandwidth, shorter time slot length and the use of large-scale wireless technology, the peak transmission speed of a single base station has reached the order of 20G bps. In order to achieve such a high transmission rate, the size of the transmission block allocated to the terminal by the MAC (Medium Access Control) layer of the base station is greatly increased, which can reach more than 100,000 bytes, while the data multiplexing time has to be shortened to 0.125 Within ms, this requires the data processing speed of base stations and terminals to be greatly improved compared with the past. [0003] The traditional base station data processing flow is that every time th...

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Problems solved by technology

[0003] The traditional base station data processing flow is that every time the RLC (Radio Link Control, radio link control) layer receives a PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) packet, the packet is stored in the buffer queue, and then the RLC layer sends the packet to the MAC The layer reports the total number of bytes of data in the current cache. The MAC layer allocates resources according to the number of bytes requested, and determines the size of the transport block allocated by scheduling. After that, the RLC performs data multiplexing according to the size of the transport block, and puts each cached PDCP data The packet is added with a subheader and then copied to the memory of the transmission block in turn. A transmission block may contain multiple PDCP packets or packet fragments. Each packet needs to be copied once. When the transmission block is large, a large amount of data needs to be transferred. Only when all the packets are copied into the same transmission block can the entire transmission block be filled. In this way, the number of data copies will be greatly increased and consume more time. However, the data multiplexing process has a time limit during the processing of the base station. The processing time will cause incomplete transmission blocks to be transmitted, so that the allocated resources cannot be fully utilized, the rate will be reduced, and it may also cause the receiving end to receive wrong data, affecting business transmission

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