Data transmission method, base station, terminal and communication system

Abstract

The invention discloses a data transmission method, a base station, a terminal and a mobile communication system. The data transmission method comprises the following steps: configuring an uplink spectrum in a paired spectrum to a full duplex spectrum by the base station; and configuring corresponding resources of the terminal in a sub-frame to implement downlink transmission in the full duplex spectrum when the base station determines that the terminal does not need to transmit data or feed back information in the sub-frame of an uplink radio frame according to a timing relationship of HARQ, and transmitting resource scheduling information of sub-frame uplink and downlink transmission on the full duplex spectrum or downlink spectrum. According to the data transmission method, the base station, the terminal and the mobile communication system disclosed by the invention, the downlink transmission can be distributed in the uplink spectrum, and thus frequency resources of the network can be used more flexibly, the efficiency of the frequency can be increased, the frequency resources of operators can be used more effectively, simplicity and small access delay can be achieved, good compatibility can be brought to different versions of the terminals, and the throughput of the whole system and terminal experiences can be improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a data transmission method, a base station, a terminal and a communication system. Background technique [0002] The development of mobile communication technology is very fast. In the future, there will still be paired and unpaired ways of spectrum division in 5G technology, and the demand for uplink and downlink rates in Internet services is extremely asymmetrical. Therefore, according to the traditional FDD (Frequency Division Duplexing: Frequency division duplex) uses paired spectrum, which will cause serious waste of resources in the uplink frequency band. In order to solve this problem, the concept of flexible duplex was proposed in the research of 5G [1] , and change a part of uplink subframes to downlink, thereby realizing effective utilization of resources. But pure flexibility also has its own flaws: [0003] 1. Compatibility issues: For some ter...

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Problems solved by technology

But pure flexibility also has its own flaws:

[0003] 1. Compatibility issues: For some terminals that do not support flexible duplex, when the uplink carrier supports uplink and downlink transmission, the data cannot be sent and received according to the existing protocol, thus affecting the normal operation of the old version terminals access

However, there are certain defects in the full-duplex technology in the networking process, which leads to slow progress in its standardization and testing: in the networking scenario, for a system that originally uses time / frequency duplex to isolate the receiving and sending nodes, all using the same frequency At the same time, nodes that have resources but do not communicate with each other will cause interference to reception when they transmit each other, so there is a huge obstacle in the application of full-duplex to cellular networks.

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