HARQ Feedback Resource Timing for Control and Backhaul Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving signals, particularly in next-generation radio access technologies like 5G NR, which require enhanced mobile broadband communication, massive MTC, and Ultra-Reliable and Low Latency Communication (URLLC).
Innovation Solution
The method involves determining the transmission resources for Hybrid Automatic Repeat Request (HARQ) feedback signals based on predefined rules using K0 and K1, which represent slot intervals and processing times, and includes mechanisms for determining K0 and K1 based on predefined rules, SCI inclusion in DCI, and reporting minimum processing times, applicable to devices with control and backhaul links in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HARQ feedback transmission resources are dynamically allocated through DCI fields, then resource allocation flexibility is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by making the DCI structure adaptive - including K0 and K1 fields only when necessary (e.g., when dynamic resource allocation is required). When using predefined rules or semi-static configurations, these fields are omitted, reducing processing complexity for cases that don't require fine-grained control.
Solution Approach 2:
The patent implements dynamics by allowing the DCI format to vary - sometimes including K0/K1 fields for dynamic allocation, sometimes excluding them when predefined rules suffice. This dynamic structure adapts to the specific transmission scenario, balancing flexibility and complexity.
2Measurement precision
If multiple DCI fields (K0, K1, PRI, SLIV) are included for precise resource control, then resource allocation precision is improved, but signal overhead and processing time increase
Solution Approach 1:
The patent applies local quality by selectively including only the necessary DCI fields based on the specific transmission scenario. For example, K0 and K1 are included only when dynamic time resource allocation is needed, while PRI and SLIV are included only when precise frequency and symbol-level control is required, avoiding unnecessary processing overhead.
3Productivity
If K0 and K1 are determined through RRC signaling and predefined rules, then processing time is reduced, but resource allocation flexibility decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring K0 and K1 values through RRC signaling and establishing predefined rules for their determination. This allows the device to quickly determine feedback resources without real-time complex processing, while still maintaining flexibility through the predefined rule set that can adapt to different scenarios.
4Reliability
If DCI includes all necessary fields for HARQ feedback resource determination, then transmission accuracy is improved, but signal overhead increases
Solution Approach 1:
The patent applies local quality by making the DCI information structure adaptive to the specific transmission scenario. Only the necessary fields (K0, K1, PRI, SLIV) are included when needed, rather than always including all possible fields. This reduces signal overhead while maintaining transmission accuracy for the specific case at hand.
Data Source
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AI summary
An apparatus in a wireless communication system, according to various embodiments: receives, from a base station through a control link, a physical downlink control channel (PDCCH) including downlink control information (DCI); and transmits a hybrid automatic repeat and request (HARQ) feedback signal for the PDCCH through a backhaul link, wherein a transmission resource of the HARQ feedback signal is determined on the basis of K0 for a slot interval between the PDCCH and a physical downlink shared channel (PDSCH) and K1 for an interval between the PDSCH and the HARQ feedback signal, and on the basis that the DCI includes side control information (SCI) for the backhaul link, at least one of the K0 and K1 may be determined on the basis of a predefined rule.