NB-IoT UL/DL Interlaced Scheduling and Early Termination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving wireless signals, particularly in NB-IoT systems, due to limitations in resource management and inter-cell interference mitigation, leading to wasted resources and increased power consumption.
Innovation Solution
The proposed solution involves a UL/DL interlaced scheduling method, DL early termination, UL early termination, and securing a time gap for transceiver switching, which includes single DCI-based UL/DL scheduling, separate DCI-based independent UL and DL scheduling, and configuring DCI monitoring to optimize resource usage and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated PUSCH transmissions and repeated PDSCH receptions are performed in NB-IoT systems, then reliability of signal transmission is improved, but power consumption increases and resource efficiency deteriorates
Solution Approach 1:
The patent applies early termination mechanisms that allow the system to perform fewer repeated transmissions than the maximum configured repetitions. When signal quality thresholds are met before completing all scheduled repetitions, the transmission/reception process is terminated early, thus reducing power consumption while maintaining reliable communication.
Solution Approach 2:
The patent implements feedback-based early termination where the receiving device monitors signal quality metrics (such as block error rate) during repeated transmissions and provides feedback to the transmitting device. Based on this feedback, the system dynamically decides whether to continue or terminate repeated transmissions, optimizing the balance between reliability and power consumption.
2Reliability
If repeated PUSCH transmissions and repeated PDSCH receptions are performed in NB-IoT systems, then reliability of signal transmission is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies early termination mechanisms that allow the system to perform fewer repeated transmissions than the maximum configured repetitions. When signal quality thresholds are met before completing all scheduled repetitions, the transmission/reception process is terminated early, thus reducing resource consumption while maintaining reliable communication.
Solution Approach 2:
The patent implements feedback-based early termination where the receiving device monitors signal quality metrics (such as block error rate) during repeated transmissions and provides feedback to the transmitting device. Based on this feedback, the system dynamically decides whether to continue or terminate repeated transmissions, optimizing the balance between reliability and resource efficiency.
3Adaptability or versatility
If transceiver switching is performed frequently in UL/DL scheduling, then system adaptability is improved, but time loss increases due to switching gaps
Solution Approach 1:
The patent applies preliminary action by pre-configuring switching gaps in the time domain between uplink and downlink periods. These gaps are planned and reserved in advance in the scheduling structure, allowing transceivers to switch modes without unexpected delays, thus reducing time loss while maintaining scheduling flexibility.
Solution Approach 2:
The patent implements dynamic UL/DL scheduling where the configuration of switching gaps and the timing of UL/DL periods can be adjusted based on traffic conditions and system state. This dynamic adaptation allows the system to optimize the balance between scheduling flexibility and time efficiency for transceiver switching.
Data Source
AI summary
The present invention relates to a wireless communication system and, specifically, to a method comprising the steps of: repeatedly transmitting a PUSCH; and repeatedly receiving the PDSCH in a DL duration immediately following after repeated transmission of the PDSCH, wherein when a terminal operates in an in-band mode, each PDSCH is received from an OFDM symbol subsequent to a k-th OFDM symbol in each corresponding time unit within the DL duration (k>1), and in the case where the terminal operates in a guard-band mode or a stand-alone mode, signal reception is skipped at a starting portion of the DL duration when the PDSCH is repeatedly received.