Uplink Resource Configuration via Frequency Domain Offset
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Solution Overview
Problem
In the New Radio (NR) system, frequency domain resource fragmentation and complex scheduling occur due to differences in demodulation reference signals (DMRS) densities and locations among terminal devices, making it difficult to ensure orthogonal DMRS ports, especially when using a random frequency hopping manner similar to LTE systems.
Innovation Solution
A method is introduced where a terminal device determines a frequency domain offset between adjacent transmission resource chunks, allowing it to configure the frequency domain location of these chunks, thereby simplifying network scheduling and avoiding resource fragmentation, while ensuring frequency domain diversity gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random frequency hopping manner is used like LTE system, then terminal device can obtain frequency domain diversity gain, but frequency domain resources become fragmented and scheduling becomes very complex
Solution Approach 1:
The patent changes the frequency domain parameters by introducing a frequency domain offset parameter that determines the location of transmission resource chunks. Instead of random hopping, the frequency location is determined by a formula using the offset parameter, which transforms the resource allocation from random to deterministic while maintaining frequency diversity through controlled offset values.
2Object-generated harmful factors
If random frequency hopping manner is used, then interference of another terminal device or cell is randomized, but transmission resource fragmentation occurs
Solution Approach 1:
The patent introduces a frequency domain offset parameter that controls the spacing between transmission resource chunks. By carefully selecting offset values, the system maintains resource continuity within allocated bands while still achieving interference randomization through different offset configurations for different terminal devices or transmission occasions.
3Adaptability or versatility
If different terminal devices have different DMRS densities and locations, then terminal-specific performance is optimized, but it is very difficult to ensure DMRS ports are orthogonal
Solution Approach 1:
The patent uses frequency domain offset parameters to control the frequency locations of transmission resource chunks, which in turn determines DMRS locations. By coordinating offset parameters across different terminal devices, the system achieves terminal-specific resource allocation while ensuring DMRS orthogonality through proper parameter configuration that prevents overlapping DMRS ports.
Data Source
AI summary
Embodiments of this application relate to a resource configuration method, a terminal device, and a network device. The method includes: determining a frequency domain offset between a plurality of transmission resource chunks allocated by a network device, where the frequency domain offset is a frequency domain offset between a first transmission resource chunk and a second transmission resource chunk, and the first transmission resource chunk and the second transmission resource chunk are any two consecutive resource chunks on an uplink transmission in the plurality of transmission resource chunks; and determining the plurality of transmission resource chunks according to the frequency domain offset, wherein the plurality of transmission resource chunks are configured for a frequency hopping transmission.