Resource Mapping Method for Carrier Interference Avoidance
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Solution Overview
Problem
In wireless communications, the deployment of carriers using frequency division multiplexing often results in wasted frequency domain resources due to fixed carrier widths, leading to interference between carriers when they share overlapping spectrum, preventing normal operation.
Innovation Solution
A resource mapping method that involves user equipment receiving a message with a transmission time unit and offset value from a base station to determine a time-frequency resource location for physical channels or signals, avoiding interference by selecting specific symbols or frequency domain locations that do not overlap with other carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If carriers are deployed through frequency division multiplexing with fixed carrier widths, then carrier deployment is simplified, but frequency domain resource waste occurs
Solution Approach 1:
The patent applies dynamic carrier width adjustment where the base station configures different carrier widths (e.g., first carrier width for first carrier, second carrier width for second carrier) based on actual spectrum availability and deployment needs. This allows the system to adapt carrier dimensions dynamically rather than using fixed widths, thereby reducing frequency domain resource waste while maintaining deployment flexibility.
2Loss of substance
If frequency domain locations of two carriers are allowed to overlap to avoid resource waste, then frequency domain resource utilization improves, but interference between carriers occurs
Solution Approach 1:
The patent segments the time domain by introducing a guard period between the first carrier and the second carrier in the time sequence. The first carrier transmits during a first time period, followed by a guard period, then the second carrier transmits during a second time period. This temporal segmentation allows both carriers to share overlapping frequency domain resources without interfering with each other, as they are separated in the time dimension.
3Object-affected harmful factors
If a guard period is introduced between carriers to prevent interference, then carrier coexistence is enabled, but time domain resource consumption increases
Solution Approach 1:
The patent optimizes the guard period parameter by configuring it with a specific duration that is sufficient to prevent interference between carriers while minimizing time domain resource consumption. The base station determines appropriate guard period lengths based on the specific carrier configurations and transmission scenarios, allowing the system to achieve carrier coexistence with minimal overhead in the time domain.
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2
AI summary
This application discloses a resource mapping method and an apparatus. The method includes the following steps: receiving, by user equipment, a first resource message sent by a base station, where the first resource message includes a transmission time unit and an offset value corresponding to the transmission time unit; and determining, by the user equipment, a time-frequency resource location of a physical channel or a physical signal in the transmission time unit based on the transmission time unit and the offset value. The technical solutions provided in this application have an advantage of avoiding interference between two carriers.