Hybrid Acknowledgement Scheme for Wireless Uplink Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication networks face inefficiencies in uplink transmission efficiency and UE power consumption, particularly in preconfigured uplink resources, especially for Machine-Type Communications (MTC) and Narrowband Internet of Things (NB-IoT) devices, which require improved feedback mechanisms to optimize resource usage and reduce power consumption.
Innovation Solution
The implementation of a hybrid acknowledgement scheme that uses both Layer 1 and Layer 2/3 feedback transmissions in preconfigured uplink resources, allowing for flexible feedback based on the need for PUR reconfiguration, enabling efficient data transmission and minimizing unnecessary signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional feedback mechanisms are used in preconfigured uplink resources, then network coverage and reliability are maintained, but uplink transmission efficiency is reduced and UE power consumption increases
Solution Approach 1:
The patent implements dynamic feedback mechanisms where the network node selectively applies different feedback types (ACK, NACK, DTX, or no feedback) based on real-time conditions such as PUR reconfiguration needs, channel quality, and UE power status. This dynamic adaptation resolves the contradiction by optimizing transmission efficiency while minimizing unnecessary power consumption from constant feedback signaling.
Solution Approach 2:
The system changes feedback parameters dynamically - switching between Layer 1 (physical layer) and Layer 2/3 (higher layer) feedback transmissions based on whether PUR reconfiguration is needed. This parameter adjustment allows the system to maintain reliability when needed while reducing overhead and power consumption during normal operations.
2Productivity
If frequent feedback transmissions are implemented to improve transmission efficiency, then resource management is optimized, but signaling overhead and network complexity increase
Solution Approach 1:
The feedback mechanism is segmented into multiple types with different levels of detail and signaling requirements. The network node selects appropriate feedback segments (simple ACK/NACK vs. detailed reconfiguration messages) based on actual needs, reducing overall signaling complexity while maintaining resource management efficiency.
Solution Approach 2:
The feedback system is designed to serve multiple functions through a unified mechanism that can operate in different modes - simple acknowledgment, reconfiguration signaling, and resource management - depending on the selected feedback type. This multi-functionality reduces the need for separate specialized mechanisms, lowering overall system complexity.
3Reliability
If Layer 2/3 feedback transmissions are used for all PUR transmissions, then comprehensive feedback information is provided, but signaling overhead and transmission latency increase
Solution Approach 1:
The system applies partial feedback action by selecting Layer 1 feedback (faster, less comprehensive) when full Layer 2/3 feedback is not necessary. This partial approach reduces latency for cases where simple acknowledgment suffices, while Layer 2/3 feedback is reserved for situations requiring comprehensive information, thus balancing reliability and speed.
Solution Approach 2:
The system uses simpler, faster Layer 1 feedback transmissions as disposable acknowledgments for routine PUR transmissions where comprehensive feedback is unnecessary. This lightweight approach reduces latency for common operations, while more detailed Layer 2/3 feedback is used only when truly needed for reliability.
Data Source
AI summary
Methods of operating a network node in a communication network are provided. Operations according to such methods include receiving a transmission that is sent by a user equipment, UE, and that is received over a preconfigured uplink resource, PUR and selecting one or more transmission types for indicating feedback corresponding to the received transmission conditioned to having been successfully received.