Unlicensed Band Data Transmission via Coordinated LBT Subframes
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving data in unlicensed bands, particularly due to interference and the need for effective channel access methods that minimize interference with other devices operating in these bands.
Innovation Solution
The implementation of a method that uses Listen Before Talk (LBT) operations, where user equipment (UE) and base stations exchange LBT type information and uplink data transmission period details to coordinate data transmission only during designated subframes, optimizing channel access and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed continuously in unlicensed band, then data throughput is improved, but interference with other devices operating in the same band increases
Solution Approach 1:
The patent implements periodic Listen Before Talk (LBT) operations where the base station and user equipment periodically sense the channel before transmission. This periodic channel access method allows data transmission to occur in periodic bursts rather than continuously, reducing interference to other unlicensed band users while maintaining reasonable throughput by efficiently utilizing available channel opportunities.
2Object-affected harmful factors
If Listen Before Talk operations are performed before every transmission, then interference is reduced, but channel access time and transmission delay increase
Solution Approach 1:
The patent performs LBT operations in advance during designated subframes and prepares transmission opportunities beforehand. By conducting channel sensing and securing transmission rights in advance through periodic LBT operations, the system reduces the time penalty during actual data transmission, as the channel access procedure is completed preliminarily in scheduled intervals rather than immediately before each transmission burst.
Data Source
AI summary
The present invention relates to a wireless communication system, and more particularly, to a method for transceiving data in an unlicensed band and an apparatus for same. In particular, disclosed in the present invention are a method and an apparatus for same, the method comprising: a terminal receiving, from a base station, listen before talk (LBT)-type information and information relating to an uplink data transmission interval during which the data is transmitted from within one subframe; and transmitting the data to the base station only during the uplink data transmission interval from within the one subframe, based on an LBT operation indicated by the LBT-type information, thereby efficiently transceiving data between the terminal and the base station in the unlicensed band.