HARQ Feedback Latency Configuration via RNTI Segmentation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in configuring Hybrid Automatic Repeat Request (HARQ) feedback latency to meet varying latency requirements for different services, such as eMBB and URLLC, which demand lower latency and higher reliability.
Innovation Solution
The method involves using Radio Network Temporary Identifiers (RNTIs) to implicitly determine HARQ-ACK feedback latency ranges, allowing for flexible configuration through DCI signaling to select appropriate latency values and RRC configuration to support multiple latency ranges, thereby accommodating different service requirements without increasing bit overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If HARQ feedback latency is reduced to meet URLLC requirements, then latency performance is improved, but system complexity increases due to need for multiple latency ranges and identifiers
Solution Approach 1:
The patent segments the HARQ feedback latency configuration into multiple discrete latency ranges (first latency range and second latency range) with different identifier values. This allows the system to offer multiple latency options without requiring a completely new configuration mechanism, thereby reducing complexity while enabling low-latency operation for URLLC services.
Solution Approach 2:
The patent changes the parameter space by introducing multiple identifier values (first identifier and second identifier) that map to different latency ranges. This parameter transformation allows the system to select appropriate latency characteristics based on service requirements without changing the fundamental DCI structure, thus improving latency performance while controlling complexity.
2Adaptability or versatility
If multiple latency ranges are configured to support different services, then adaptability is improved, but bit overhead in DCI increases
Solution Approach 1:
The patent makes the DCI structure universal by using the same DCI format for both first and second latency ranges, differentiated only by the identifier value. This multi-functional approach allows a single DCI structure to support multiple service types (eMBB and URLLC) with different latency requirements, improving adaptability without increasing bit overhead.
Solution Approach 2:
The patent applies local quality by using different identifier values within the same DCI structure to indicate different latency characteristics. This allows fine-grained differentiation of service requirements at the DCI level without changing the overall DCI format, thereby achieving service adaptability while minimizing overhead.
3Adaptability or versatility
If RRC configuration is used to set HARQ feedback timing, then configuration flexibility is improved, but setup time increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple latency ranges and their corresponding identifiers through RRC signaling before actual data transmission occurs. This allows the UE and gNB to have pre-established latency configuration tables, enabling fast selection during scheduling without requiring time-consuming configuration setup during active communication.
Solution Approach 2:
The patent introduces dynamics by allowing the system to switch between different latency ranges dynamically during operation based on service requirements. The gNB can dynamically select between first and second latency ranges by changing the identifier in DCI, providing flexible adaptation without requiring reconfiguration, thus balancing configuration flexibility with fast setup.
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE receives a first signaling, receives a first radio signal in a first time window, and then transmits a feedback on the first radio signal in a second time window. The first signaling is used for determining time-domain resources occupied by the first radio signal; a first time-domain deviation is a deviation in time domain between the second time window and the first time window; when the first signaling carries a first identifier, the first time-domain deviation is one of K1 first-type candidate deviation(s), and K1 is a positive integer; when the first signaling carries a second identifier, the first time-domain deviation is one of K2 second-type candidate deviation(s), and K2 is a positive integer.