TDD Uplink Frequency Mapping Across SBFD and Non-SBFD Slots
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Solution Overview
Problem
In time division duplexing (TDD) systems, there is a lack of a clear method for a base station to indicate frequency domain resources for uplink transmission, leading to limited uplink coverage due to the scarcity of uplink slots.
Innovation Solution
A communication method and apparatus that determines frequency domain resources by using a single piece of information to set frequency units in both subband full-duplex (SBFD) and non-SBFD time units, allowing for flexible indication of frequency unit sets without increasing interactions between the terminal device and the network side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If subband non-overlapping full duplex (SBFD) is used to enhance uplink coverage by dividing frequency bands, then uplink coverage is improved, but there is no clear method for the base station to indicate frequency domain resources to the terminal device
Solution Approach 1:
The patent applies universality by using a single piece of information (first information) to indicate frequency unit sets for both SBFD time units and non-SBFD time units. This multi-functional approach allows the same indication mechanism to work across different time unit types, resolving the issue of lacking clear frequency resource indication methods in SBFD while maintaining simplicity.
Solution Approach 2:
The patent uses parameter changes by introducing a frequency spacing parameter that can be configured differently for SBFD and non-SBFD time units. This allows flexible adjustment of frequency domain resource allocation without requiring separate indication mechanisms, thereby improving uplink coverage while maintaining operational clarity.
2Measurement precision
If separate indication methods are used for frequency unit sets in SBFD and non-SBFD time units, then frequency resource allocation becomes more precise, but the quantity of interactions between terminal device and network side increases
Solution Approach 1:
The patent merges the indication mechanisms for SBFD and non-SBFD time units into a single unified approach. By combining the frequency unit set indication into one piece of information that serves both time unit types, it achieves precise frequency resource allocation without increasing interaction overhead, thus resolving the contradiction between precision and interaction time.
3Adaptability or versatility
If multiple pieces of information are used to indicate frequency unit sets for different time unit types, then frequency resource indication becomes more comprehensive, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a single indication mechanism that universally handles frequency unit set indication for both SBFD and non-SBFD time units. This reduces device complexity by avoiding multiple separate indication processes while maintaining comprehensive adaptability through configurable parameters that can be adjusted based on the specific time unit type.
Data Source
AI summary
A communication method and apparatus are provided. In the communication method, a second communication apparatus may indicate a first frequency unit set and a first frequency spacing by using first information. The first communication apparatus may determine a second frequency unit set based on the first frequency unit set and the first frequency spacing. The first frequency unit set and the second frequency unit set are respectively frequency units used to transmit a first type of signal in different types of time units.