Frequency Domain Resource Grouping for Non-Contiguous Spectrum Interference
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Solution Overview
Problem
In 5G communications systems with non-contiguous spectrums, terminal devices face interference from signals of other operators due to overlapping frequency bands, leading to inefficient use of spectrum resources and degraded data transmission quality.
Innovation Solution
A communication method where terminal devices receive indication information from network devices to determine available and unavailable frequency domain resources, using narrowband filters to avoid interference by filtering out signals from other systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a large system bandwidth including discrete spectrums is used to improve spectral efficiency, then spectral efficiency is improved, but interference from signals of other operators increases
Solution Approach 1:
The system bandwidth is segmented into multiple frequency domain resource groups, where each group corresponds to a specific frequency range. The terminal device is configured to monitor only the frequency domain resource groups relevant to its operator, dividing the large bandwidth into manageable segments and avoiding interference from other operators' signals in different segments.
Solution Approach 2:
Different frequency domain resource groups are assigned different monitoring configurations based on local requirements. The terminal device applies different monitoring parameters (such as monitoring occasions, offset values, and resource block assignments) to different frequency domain resource groups, allowing optimized local resource utilization while avoiding global interference.
2Reliability
If the terminal device monitors the entire system bandwidth to receive downlink signals, then complete signal reception is achieved, but interference from other systems increases
Solution Approach 1:
The downlink signal reception is segmented by frequency domain resource groups. Instead of monitoring the entire system bandwidth, the terminal device monitors only the specific frequency domain resource groups assigned to its operator. This segmentation maintains reliable signal reception for the assigned resources while excluding interference from other systems operating in different frequency segments.
3Loss of energy
If non-contiguous frequency domain resource groups are used to accommodate discrete spectrums, then spectrum utilization is improved, but device complexity increases
Solution Approach 1:
The network device performs preliminary configuration by pre-defining frequency domain resource groups and their parameters (such as resource block assignments, monitoring occasions, and offset values) before the terminal device operates. This preliminary action allows the terminal device to simply follow the pre-configured parameters, reducing its processing complexity while still achieving efficient utilization of non-contiguous spectrum resources.
Solution Approach 2:
The system uses parameter-based configuration to manage non-contiguous frequency domain resource groups. By changing and configuring parameters such as resource block offsets, monitoring occasions, and frequency domain resource assignments, the system can flexibly accommodate discrete spectrums without requiring complex structural changes in the terminal device architecture.
Data Source
AI summary
This application relates to the field of communications technologies, and discloses a communication method and a communications apparatus. A terminal device receives first indication information from a network device, where the first indication information indicates an available frequency domain resource, in a bandwidth, which can be used by the terminal device to communicate with the network device. The bandwidth is one carrier bandwidth or one carrier bandwidth part. The available frequency domain resource includes a plurality of non-contiguous frequency domain resource groups, and each frequency domain resource group includes one or more contiguous frequency domain resource blocks. The terminal device determines the available frequency domain resource in the bandwidth based on the first indication information.