5G NR Time-Domain Resource Indication via Preset Subcarrier Spacing
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Solution Overview
Problem
In 5G NR systems, the existing method of indicating time domain resource information based on a single subcarrier spacing increases terminal complexity and resource consumption, as devices must try decoding based on multiple subcarrier spacings due to the lack of clarity on which spacing the indication information is based.
Innovation Solution
A method and apparatus for indicating time domain resource information in 5G NR systems that conveys this information based on preset subcarrier spacing, including the specific spacing or a rule derived from multiple spacings, allowing for clear indication of the data channel's starting point, ending point, and length, thereby reducing complexity and resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If time domain resource indication information is conveyed without specifying subcarrier spacing, then the indication method is simple and compatible with multiple spacings, but terminal complexity and resource consumption increase due to multiple decoding attempts
Solution Approach 1:
The patent applies preliminary action by specifying the subcarrier spacing in advance within the time domain resource indication information. Instead of requiring terminals to attempt multiple decodings, the correct subcarrier spacing is predetermined and included in the indication, allowing terminals to decode directly with the correct parameters, thereby reducing complexity and resource consumption.
Solution Approach 2:
The patent changes the parameter representation by encoding both the time domain resource information and the subcarrier spacing parameter together in a unified indication structure. This allows the indication to adapt to different subcarrier spacings (15kHz, 30kHz, 60kHz, 120kHz) while maintaining a consistent indication format, resolving the contradiction between simplicity and information completeness.
2Adaptability or versatility
If multiple subcarrier spacings are supported for flexibility, then service adaptability improves, but resource consumption increases due to multiple decoding attempts
Solution Approach 1:
The patent applies preliminary action by pre-specifying the subcarrier spacing in the indication information. This allows the system to support multiple subcarrier spacings (15kHz, 30kHz, 60kHz, 120kHz) for different services while terminals only need to perform a single decoding operation with the correct parameters, thereby maintaining service adaptability without increasing power consumption.
3Productivity
If subcarrier spacing is not specified in indication information, then indication format remains simple, but decoding efficiency decreases due to multiple attempts
Solution Approach 1:
The patent changes the indication format by integrating subcarrier spacing parameters into the existing time domain resource indication structure. This allows the indication to convey both resource allocation and subcarrier spacing information in a unified format, improving decoding efficiency by eliminating multiple decoding attempts while maintaining format simplicity through systematic parameter encoding.
Data Source
AI summary
The present disclosure provides a time-domain resource information indication method and apparatus. The method comprises: in a mobile communication system using multiple subcarrier intervals, transmitting, based on preset subcarrier interval information, time-domain resource indication information of a data channel. The preset subcarrier interval information may comprise one of the multiple subcarrier intervals or is based on rules of the multiple subcarrier intervals. For a system, such as a 5G NR, which uses multiple subcarrier intervals, the present disclosure provides a mechanism for indicating, based on preset subcarrier interval information, time-domain resource information of a data channel.