Variable-Bandwidth NR Signal Transmission with Guard Bands
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Solution Overview
Problem
Existing communication systems face challenges in efficiently transmitting and receiving signals and channels using variable bandwidths, particularly in NR communication systems, where base stations and terminals need to adapt to changing channel environments.
Innovation Solution
The method involves configuring guard bands and resource block sets within a bandwidth part of an unlicensed band, using configuration information to identify and utilize these sets for communication, along with control resource sets and search spaces, enabling flexible communication using variable bandwidths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed bandwidth is used for signal transmission, then the communication system structure is simple, but the system cannot adapt to changing channel environments
Solution Approach 1:
The patent implements dynamic bandwidth adjustment by configuring multiple bandwidth parts (BWPs) with different bandwidths within an unlicensed band. The base station can switch between these pre-configured BWPs based on channel conditions, enabling the system to adapt dynamically while maintaining manageable complexity through pre-planned configurations.
Solution Approach 2:
The unlicensed band is segmented into multiple bandwidth parts (BWPs), each with specific bandwidth characteristics. This segmentation allows the system to use smaller BWPs for low-interference scenarios and larger BWPs for high-capacity transmission, providing adaptability without requiring complete system redesign.
2Productivity
If variable bandwidth is used to adapt to channel environments, then communication efficiency improves, but the complexity of signal transmission and reception increases
Solution Approach 1:
The base station performs preliminary configuration of multiple bandwidth parts (BWPs) before actual communication begins. This pre-configuration includes setting up guard bands, control resource sets, and search spaces for each BWP, so that when bandwidth switching is needed, the terminal can quickly switch without complex real-time calculations.
Solution Approach 2:
The patent introduces guard bands as intermediary elements between adjacent BWPs. These guard bands serve as transition zones that facilitate smooth switching between different bandwidths, reducing interference and simplifying the terminal's bandwidth switching operations.
3Reliability
If guard bands are configured between adjacent resource block sets, then interference between bands is reduced, but the usable bandwidth decreases
Solution Approach 1:
The patent applies different guard band configurations to different locations within the unlicensed band. Guard bands are strategically placed between adjacent resource block sets where interference is most likely to occur, while minimizing their impact on the overall usable bandwidth. The configuration is optimized locally rather than uniformly applied.
Data Source
AI summary
A method and an apparatus for transmitting/receiving a signal by using a variable band width in a communication system are disclosed. An operating method of a terminal comprises the steps of: receiving, from a base station, first configuration information about one or more guard bands of an unlicensed band; confirming the one or more guard bands configured in the unlicensed band on the basis of the first configuration information; and confirming a plurality of RB sets configured in the unlicensed band on the basis of the one or more guard bands. Therefore, performance of the communication system can be improved.