Radio Resource Allocation in Unlicensed Spectrum
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Solution Overview
Problem
Current radio communication systems face challenges in efficiently allocating radio resources and performing channel access procedures in unlicensed spectra, particularly in 5G communication systems, which are essential for providing various services like enhanced mobile broadband, massive machine-type communications, and ultra-reliable and low-latency communications.
Innovation Solution
The proposed solution involves a method and device for radio resource allocation in a radio communication system, where a base station transmits configuration information for a bandwidth part in an unlicensed spectrum, performs channel access procedures for each subband, and transmits the results to a terminal, allowing efficient communication by determining idle subbands for data channel transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel access procedure is performed for each subband in unlicensed spectrum, then channel access efficiency is improved, but device complexity increases
Solution Approach 1:
The patent divides the unlicensed spectrum bandwidth into multiple subbands and performs channel access procedures independently for each subband. This segmentation allows the system to identify and utilize idle subbands while avoiding congested ones, thereby improving channel access efficiency without requiring complete access to the entire bandwidth.
Solution Approach 2:
The patent implements dynamic subband selection based on real-time channel access results. The base station and terminal adaptively adjust which subbands are used for data transmission according to the outcomes of channel access procedures, enabling flexible resource allocation that responds to changing channel conditions.
2Manufacturing precision
If configuration information for bandwidth part is transmitted to terminal, then resource allocation precision is improved, but loss of information increases
Solution Approach 1:
The patent extracts and transmits only the essential configuration information related to the bandwidth part and subband allocation to the terminal. By selectively transmitting only the necessary configuration parameters rather than complete system information, the patent achieves precise resource allocation while minimizing information overhead and transmission burden.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An operation method of a base station in a radio communication system and an apparatus therefor are provided. The operation method includes transmitting, to a terminal, configuration information including a configuration of a bandwidth part in an unlicensed spectrum, the bandwidth part including a plurality of subbands, performing a channel access procedure for each of the plurality of subbands included in the bandwidth part, initiating channel access via at least one subband, among the plurality of subbands, determined to be an idle channel according to a result of the channel access procedure, transmitting, to the terminal, the result of the channel access procedure for each subband, among the plurality of subbands, and transmitting, to the terminal, a data channel according to the result of the channel access procedure for each subband, among the plurality of subbands.