Uplink Frequency Hopping Across Multiple Slots for Flexible 5G NR Scheduling
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Solution Overview
Problem
Existing frequency hopping methods in 5G NR systems are rigid and inflexible, failing to efficiently accommodate diverse usage scenarios such as eMBB, mMTC, and URLLC, which require different data rates, latency, and coverage requirements.
Innovation Solution
Implement frequency hopping across multiple slots to enhance flexibility and adapt to varying scenarios, allowing for efficient multiplexing of radio resources based on different numerologies, including subcarrier spacing and transmission time intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency hopping is implemented across multiple slots, then scheduling flexibility is improved, but system complexity increases
Solution Approach 1:
The patent segments the frequency hopping process into distinct phases: intra-slot frequency hopping for the first half of symbols and inter-slot frequency hopping for subsequent slots. This segmentation allows independent optimization of each hopping mechanism, reducing overall system complexity while maintaining scheduling flexibility across multiple slots for diverse usage scenarios
Solution Approach 2:
The patent implements dynamic frequency hopping by enabling the base station to determine hopping patterns based on real-time scheduling decisions. The frequency hopping offset and pattern can be dynamically adjusted per slot based on channel conditions and traffic requirements, allowing the system to adapt to varying scenarios (eMBB, mMTC, URLLC) without requiring complex pre-configured structures
2Reliability
If repeated transmission is enabled in a slot, then transmission reliability is improved, but scheduling rigidity increases
Solution Approach 1:
The patent resolves the contradiction by making the frequency hopping pattern dynamic rather than fixed. When repeated transmission is enabled, the base station can still determine the frequency hopping offset and pattern based on real-time scheduling decisions for each slot. This dynamic approach allows the system to maintain transmission reliability through repetition while avoiding scheduling rigidity by adapting the hopping pattern to current traffic conditions and channel state information
3Adaptability or versatility
If frequency hopping is applied based on current slot number, then scheduling flexibility is improved, but frequency resource allocation becomes less efficient
Solution Approach 1:
The patent incorporates feedback mechanisms where the base station determines frequency hopping patterns based on channel state information and scheduling decisions. The frequency hopping offset is calculated considering the actual channel conditions and traffic requirements, allowing efficient frequency resource allocation. This feedback-driven approach ensures that frequency hopping provides scheduling flexibility while optimizing resource utilization across multiple slots
Data Source
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AI summary
Provided are a method and a device for hopping a frequency to perform uplink transmission. The method may include: receiving frequency hopping configuration information for a transport block transmitted using a plurality of slots; determining a frequency resource location to be hopped in the plurality of slots based on the frequency hopping configuration information; and transmitting the transport block through the plurality of slots according to the frequency resource location.