Physical Channel Repetition Across Frequency Resources for Low-Latency NR
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Solution Overview
Problem
In the New Radio (NR) system, repetition of physical channels in the time domain increases transmission delay and requires more resources, which is not ideal for delay-sensitive services like Extended Reality (XR) and Ultra-Reliable Low Latency Communications (URLLC).
Innovation Solution
The method involves transmitting or receiving multiple physical channels with frequency-domain resources belonging to different frequency-domain resource sets, allowing for repetition on different frequency-domain resources to reduce transmission delay while maintaining high reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical channel repetition is performed in the time domain, then transmission reliability is improved, but transmission delay increases significantly
Solution Approach 1:
The patent transitions from time-domain repetition to frequency-domain repetition by allocating the same physical channel information across multiple frequency-domain resource sets. This dimensional shift allows redundancy to be achieved through frequency diversity rather than temporal repetition, thereby maintaining reliability while significantly reducing transmission delay.
Solution Approach 2:
The invention changes the domain parameter from time to frequency by configuring multiple frequency-domain resource sets with different frequency resources. This parameter transformation enables the system to achieve channel repetition effects through frequency-domain resource allocation instead of time-domain scheduling, resolving the contradiction between reliability and delay.
2Reliability
If physical channel repetition is performed in the time domain, then transmission reliability is improved, but more time-domain resources are required
Solution Approach 1:
The patent shifts the repetition mechanism from the time dimension to the frequency dimension by utilizing multiple frequency-domain resource sets. This allows the system to achieve the same reliability improvement without extending the time-domain duration, as the redundancy is achieved through parallel frequency resource allocation rather than sequential time resource consumption.
Solution Approach 2:
The invention segments the frequency-domain resources into multiple distinct frequency-domain resource sets, each carrying the same physical channel information. This segmentation in the frequency domain replaces the need for extended time-domain resources, as each frequency segment can be transmitted simultaneously or in parallel, reducing the overall time required.
3Loss of time
If frequency-domain resources are used for physical channel repetition, then transmission delay is reduced, but frequency-domain resource allocation complexity increases
Solution Approach 1:
The patent changes the resource allocation parameter from time-domain scheduling to frequency-domain configuration. By defining multiple frequency-domain resource sets with specific frequency resources, the system achieves faster transmission while the complexity is managed through structured frequency resource definitions rather than complex time-domain scheduling decisions.
Data Source
AI summary
A method for data transmission includes: a terminal device sends or receives a first number of physical channels. The first number of physical channels include a first physical channel and a second physical channel, frequency-domain resources of the first physical channel and frequency-domain resources of the second physical channel belong to different frequency-domain resource sets, different frequency-domain resource sets have different frequency-domain resources, the first number is greater than 1, and the first number of physical channels are used for transmission of first information.