Adaptive Receiver Resource Allocation for TDD Feedback Delays
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Solution Overview
Problem
Conventional receivers are limited in performance due to fixed resource allocation for data processing, which does not adapt to changes in transmission configuration schemes and feedback reporting intervals, leading to inefficiencies in processing received data blocks when uplink subframe availability changes.
Innovation Solution
The receiver allocates resources based on transmission configuration information, determining potential feedback reporting delays and adjusting resource allocation accordingly, such as by reallocating turbo decoder iterations or channel estimation complexity, to optimize performance across varying transmission configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional receivers use fixed resource allocation for data processing, then device complexity is reduced and ease of operation is improved, but receiver performance deteriorates when transmission configuration schemes change
Solution Approach 1:
The receiver dynamically adjusts resource allocation based on the detected transmission configuration scheme. The resource allocator modifies processing resources (e.g., turbo decoder iterations, channel estimation complexity) according to the actual TDD configuration, transforming the static fixed allocation into a dynamic adaptive system that maintains optimal performance across different transmission configurations.
2Manufacturing precision
If receivers allocate maximum resources for processing, then manufacturing precision and measurement precision are improved, but use of energy increases and productivity decreases
Solution Approach 1:
The receiver changes processing parameters (number of turbo decoder iterations, channel estimation complexity) based on the transmission configuration scheme and available processing time. When feedback reporting delay is expected, the receiver increases processing parameters to improve precision; when delay is minimal, the receiver reduces parameters to conserve energy, thus adaptively optimizing the energy-precision tradeoff.
3Productivity
If uplink subframes are reduced to increase downlink capacity, then productivity is improved, but feedback reporting delay increases
Solution Approach 1:
The receiver performs preliminary detection of the transmission configuration scheme and predicts the feedback reporting delay before actual feedback transmission. Based on this advance knowledge, the receiver proactively adjusts resource allocation for data processing, preparing adequate processing resources in advance when delay is expected, thus mitigating the impact of increased delay on processing performance.
4Reliability
If receivers are optimized for a single transmission configuration scheme, then receiver performance is improved for that specific configuration, but adaptability deteriorates when configurations change
Solution Approach 1:
The receiver implements a universal resource allocation mechanism that detects and adapts to multiple different TDD transmission configuration schemes. The resource allocator is designed to work across various configurations (different numbers of downlink and uplink subframes) by dynamically adjusting processing resources based on the detected configuration, making the receiver universally applicable rather than optimized for a single configuration.
Data Source
AI summary
Receiver resources are allocated based on how subframes are allocated within in a frame between downlink and uplink transmissions and how often the receiver is expected to report feedback information associated with the downlink transmissions. Additional time is available for processing received data blocks if the feedback information derived from those blocks must be reported later than expected due to the unavailability of uplink subframes. According to one embodiment, received signals are processed by receiving transmission configuration information indicating how downlink and uplink subframes are allocated within a frame in the time domain. Based on the transmission configuration information, the receiver determines whether a delay that exceeds a feedback reporting interval assigned to the receiver will occur when reporting feedback information associated with the downlink subframes. Receiver resources are allocated based on whether a delay will occur when reporting the feedback information.