Early Termination Signal for PUSCH HARQ-ACK Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radio access networks face challenges in efficiently managing Hybrid Automatic Repeat Request (HARQ) processes for Machine Type Communications (MTC) UEs, particularly in reducing power consumption and optimizing network resource usage.
Innovation Solution
The implementation of an Early Termination Signal (ETS) and HARQ-ACK feedback mechanism for the Physical Uplink Shared Channel (PUSCH) in Even Further Enhanced Machine Type Communication (EFEMTC) systems, allowing UEs to terminate repeated transmissions early based on feedback from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated PUSCH transmissions are performed to ensure reliable data delivery, then reliability is improved, but power consumption increases
Solution Approach 1:
The base station sends early termination indication feedback to the UE when data is successfully decoded before all scheduled repetitions are transmitted. This feedback mechanism allows the UE to stop transmitting early, reducing power consumption while maintaining reliable data delivery.
Solution Approach 2:
Instead of performing all scheduled repeated transmissions, the system allows partial action by terminating transmissions early once successful decoding is achieved. This avoids excessive power consumption while ensuring reliable delivery through the necessary minimum repetitions.
2Reliability
If repeated PUSCH transmissions are performed to ensure reliable data delivery, then reliability is improved, but transmission time increases
Solution Approach 1:
The early termination indication feedback enables the system to identify when successful decoding has occurred, allowing immediate termination of remaining repetitions. This reduces transmission time while maintaining reliability by continuing transmissions only until successful decoding is achieved.
Solution Approach 2:
Once successful decoding is confirmed through feedback, the system skips the remaining scheduled repetitions and rushes through to completion by terminating early. This eliminates unnecessary time consumption while preserving reliable data delivery through the already successful transmission.
3Use of energy by moving object
If early termination is implemented, then power consumption is reduced, but system complexity increases
Solution Approach 1:
The early termination indication utilizes existing HARQ feedback channels and mechanisms, making the solution multi-functional. The same feedback infrastructure serves both traditional HARQ acknowledgment and early termination signaling, avoiding additional complex dedicated signaling mechanisms.
Solution Approach 2:
The base station automatically generates and sends early termination indications based on its decoding status without requiring additional complex coordination or signaling from the UE. The system serves itself by utilizing existing feedback channels to communicate termination needs.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Systems and methods of early termination of uplink data transmissions for a UE are described. The UE transmits capacity information that indicates that the UE supports use of an ETS. The ETS indicates successful reception by the eNB of the uplink data prior to an end of a scheduled transmission period to transmit repeated instances of the data. The UE receives a schedule for repeated transmissions of the data that is based on a coverage level of the UE, and then transmits sets of one or more repetitions. After the transmission, the UE monitors a predetermined resource whether the ETS is present or whether the ETS indicates an ACK. If the ETS indicates successful reception, the UE terminates transmission of the remaining repetitions of the data and enters a sleep mode or transmits other uplink data.