Early Termination Indicator for Wireless Transmission Power Reduction
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Solution Overview
Problem
Wireless communications systems, such as W-CDMA, lack an early termination indicator (ETI) mechanism, leading to inefficient use of transmission power and reduced system capacity due to continued data transmission after successful decoding.
Innovation Solution
Implementing an early termination indicator (ETI) in uplink or downlink slots, allowing for the termination of transmission during a transmission time interval (TTI) upon successful decoding, by replacing or reserving symbols in the UL or DL slots for ETI transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If data transmission continues for the full TTI duration, then transmission reliability is maintained, but transmission power consumption increases and system capacity decreases
Solution Approach 1:
The system performs preliminary decoding attempts at intermediate points during the TTI (e.g., after receiving first half of data slots) before the full transmission duration elapses. This allows early detection of successfully decoded data, enabling transmission termination before the complete TTI duration, thus reducing power consumption while maintaining reliability through proactive decoding checks.
Solution Approach 2:
The system implements feedback mechanisms where decoding results are continuously monitored during the TTI. When successful decoding is detected at any intermediate point, an early termination indicator is generated and transmitted back to the transmitter, creating a feedback loop that enables dynamic transmission termination based on real-time decoding status, thereby reducing energy loss without compromising reliability.
2Productivity
If data transmission continues for the full TTI duration, then complete data delivery is ensured, but system capacity is reduced
Solution Approach 1:
The system performs preliminary decoding checks at intermediate TTI points to determine if complete data delivery has been achieved earlier than expected. This preliminary action allows the system to identify successfully transmitted data blocks and terminate transmission early, thereby increasing system capacity by freeing up resources while ensuring data delivery completeness through verified decoding success.
Solution Approach 2:
The transmission termination point is made dynamic rather than fixed at the end of TTI. The system adaptively determines the termination point based on real-time decoding outcomes, allowing transmission to end as early as successful decoding occurs or as late as needed if decoding fails, thus optimizing system capacity while maintaining data delivery completeness through flexible, condition-based termination.
3Loss of energy
If early termination indicator is implemented, then transmission power is reduced, but system complexity increases
Solution Approach 1:
The early termination indicator mechanism is designed to be universally applicable across different transmission scenarios and data types. By creating a multi-functional system that can handle various decoding outcomes (success, failure, partial success) and work with different data formats, the added complexity is amortized across multiple use cases, reducing the relative complexity burden while achieving significant transmission power reduction through unified early termination capability.
Data Source
AI summary
A method for early termination of transmission is disclosed. The method includes: receiving downlink (DL) data from a DL channel during a transmission time interval (TTI); attempting to decode the received DL data before receiving all DL data of the TTI; and transmitting an early termination indicator (ETI) in an uplink (UL) slot of a UL radio frame to terminate transmission of the DL data during the TTI based on a successful decode, wherein at least one symbol of the UL slot is replaced by the ETI.