SIMD Decoder Control Using Global Transition Points for Low Latency
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Solution Overview
Problem
Existing systems with iterative functions for error correction in wireless networks face bottlenecks due to inefficiencies caused by varying signal-to-noise ratios and require either complex multi-controller setups or increased power consumption.
Innovation Solution
A low-latency architecture using a single controller to independently initiate decoding sequences for each decoder at a finer granularity, based on global transition points within the decoding process, allowing for reduced wait times and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single controller is used to control multiple decoders, then device complexity is reduced, but processing latency increases due to bottlenecks in sequential control
Solution Approach 1:
The patent segments the control function by dividing the decoding process into distinct phases (receive phase and decode phase) that can be executed concurrently. The single controller is segmented into multiple control logic units that can independently manage different decoders simultaneously, eliminating the sequential bottleneck while maintaining a single controller architecture.
Solution Approach 2:
The patent implements preliminary action by pre-loading data into buffers during the receive phase before decoding begins. This allows the decoding phase to start immediately when data is ready, without waiting for complete data transfer, thereby reducing processing latency while using a single controller to coordinate the phased operations.
2Loss of time
If multiple controllers are used to control each decoder separately, then processing latency is reduced, but power consumption and chip space increase
Solution Approach 1:
The single controller is designed with multi-functional control logic that can simultaneously perform the roles of multiple dedicated controllers. The controller contains configurable decoding logic that can be dynamically assigned to different decoders based on their specific requirements, providing multi-controller performance with single-controller resource utilization, thereby reducing power consumption and chip space.
Solution Approach 2:
The patent implements dynamic control where the single controller can adaptively allocate its control resources to different decoders based on real-time processing needs. The controller dynamically switches between controlling different decoders and can operate multiple decoding sequences concurrently with varying priorities, achieving low latency without the static overhead of multiple dedicated controllers.
3Productivity
If multiple controllers are used to handle different channels, then processing efficiency improves, but device complexity and chip space requirements increase
Solution Approach 1:
The patent adds a temporal dimension to the control architecture by implementing phased decoding sequences that operate in different time slots. The single controller manages multiple channels by assigning them to different phases (receive phase, decode phase, output phase) that execute concurrently in time, effectively creating a multi-dimensional control space that achieves multi-controller productivity with single-controller simplicity.
Solution Approach 2:
The controller implements periodic action by cycling through different decoding phases in a repeating sequence. Each channel progresses through the decoding phases periodically, with the controller switching control between channels at regular intervals. This periodic control pattern enables efficient handling of multiple channels with a single controller, maintaining high productivity while avoiding the complexity of simultaneous multi-controller management.
Data Source
AI summary
Systems, methods, and other embodiments associated with iterative decoders are described. According to one embodiment, an apparatus includes a set of decoders that are configured to receive data to be decoded. The apparatus may also include a controller configured to separately control each decoder to initiate a decoding sequence based on an occurrence of a transition point. The transition point is a global transition that occurs iteratively for the set of decoders and is based on iterations in a decoding sequence.