NR Resource Mapping Flexibility via Time Domain Units
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Solution Overview
Problem
In new radio (NR) systems, the configuration of time domain resources in unlicensed bands using bitmaps for autonomous uplink access is not flexible due to requirements that the period for bitmap configuration must be divisible by 40 or that the number of bits per frequency band is fixed, limiting the flexibility of resource allocation.
Innovation Solution
A resource mapping method that uses a numerical value in configuration information to indicate the number of channels or time domain units to be mapped in each period, allowing for flexible configuration of time domain resources by determining the start position and quantity of usable units, thereby enabling more flexible allocation of time domain resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If one bit represents one subframe in the bitmap for autonomous uplink access, then the bitmap configuration period is fixed at 40 subframes, but this leads to inflexible resource configuration periods
Solution Approach 1:
The patent segments the 40-subframe bitmap into multiple smaller units by introducing the concept of time domain units (TDUs) that can be independently configured. Each TDU represents a configurable time interval rather than being forced to align with the entire 40-subframe period, allowing flexible resource allocation without being constrained by the fixed 40-subframe boundary.
Solution Approach 2:
The patent introduces dynamic configurability by allowing the network to flexibly set the number of TDUs per period and the duration of each TDU through RRC signaling. This transforms the static 40-subframe fixed structure into a dynamic system where the bitmap period and TDU configuration can be adapted to different service requirements and traffic patterns.
2Productivity
If different subcarrier spacings correspond to the same bitmap configuration period, then the number of bits per frequency band is fixed, but this leads to inflexible resource allocation for different frequency bands
Solution Approach 1:
The patent applies local quality by allowing different frequency bands to have different bitmap configurations tailored to their specific requirements. Each frequency band can have its own number of TDUs and bit quantities configured independently based on its subcarrier spacing and traffic characteristics, rather than being forced to use a uniform configuration across all bands.
Solution Approach 2:
The patent enables parameter changes by introducing configurable parameters such as the number of TDUs per period and the duration of each TDU, which can be adjusted through RRC signaling. This allows the system to adapt the bitmap configuration parameters to match different subcarrier spacings and frequency band characteristics, optimizing resource allocation for each band independently.
3Ease of manufacture
If the bitmap configuration requires the period to be divisible by 40, then the time domain resource configuration is simplified, but this leads to limited flexibility in choosing configuration periods
Solution Approach 1:
The patent adds another dimension to the configuration space by introducing the TDU concept that operates within the broader bitmap period. Instead of being constrained to single-dimensional 40-subframe periods, the system now has a two-dimensional structure where the overall period can be any duration, and within it, multiple TDUs can be configured to represent different time intervals, providing both simplicity and flexibility.
Data Source
AI summary
A resource mapping method and user equipment are provided. The method includes: mapping a target channel to a first time domain resource based on configuration information, where the target channel carries first data, and the configuration information includes a first numerical value; and the first numerical value is used to indicate the number of channels to be mapped to a target time domain resource in each period, or the number of usable first time domain units in each period; the target time domain resource is a resource configured for the first data; and the first time domain resource is a resource in the target time domain resource.