Adaptive Radio Frame Subframe Latency Reduction
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Solution Overview
Problem
Current communication systems face challenges in reducing round-trip latency and overhead, particularly due to the lack of a single optimal frame duration that suits different traffic types and quality of service requirements, making it difficult to develop industry-standard equipment.
Innovation Solution
The method involves dividing radio frames into multiple subframes with selectable frame durations and types, allowing data to be transmitted in multiple subframes, and using adaptive modulation and coding to match current signal quality, thereby reducing latency and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single frame duration is used for all traffic types, then system simplicity is maintained, but round-trip latency and overhead cannot be optimized for different traffic types
Solution Approach 1:
The patent segments the radio frame into multiple subframes with different durations (e.g., 0.5ms, 1ms, 2ms, 5ms, 10ms). This allows the system to select appropriate subframe durations for different traffic types, optimizing latency for real-time traffic while maintaining simplicity through a standardized subframe-based structure.
Solution Approach 2:
The patent implements dynamic frame duration selection where the base station can adaptively choose different subframe durations based on traffic conditions and QoS requirements. This dynamic adjustment allows the system to optimize performance for different traffic types without requiring complex manual configuration.
2Loss of time
If frame duration is reduced to lower latency, then round-trip latency decreases, but control channel overhead becomes less efficient
Solution Approach 1:
By segmenting the frame into subframes of different durations, the system can use shorter subframes (0.5ms, 1ms) for latency-critical traffic while using longer subframes (2ms, 5ms, 10ms) for traffic types where control channel efficiency is more important, thus optimizing the trade-off dynamically.
Solution Approach 2:
The patent changes the frame duration parameter adaptively based on traffic type and QoS requirements. The base station selects appropriate subframe durations from multiple options, adjusting this parameter to optimize both latency and control channel efficiency for different communication scenarios.
3Productivity
If multiple frame durations are implemented, then latency and overhead optimization is achieved, but industry standard development becomes difficult
Solution Approach 1:
The patent creates a universal frame structure where multiple subframe durations share common control channels and synchronization mechanisms. This multi-functional design allows different subframe types to coexist within a standardized framework, facilitating industry standard development while maintaining system efficiency.
Solution Approach 2:
By using a standardized subframe-based segmentation approach, the patent enables flexible frame duration configuration within a consistent structural framework. This allows equipment from different manufacturers to implement the same basic structure with varying subframe durations, easing the path to industry standard adoption.
Data Source
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AI summary
A method for transmitting data within a communication system (100) comprises determining a carrier bandwidth from a set of two or more carrier bandwidths, receiving data to be transmitted over a radio frame (300, 400, 500), wherein the radio frame is comprised of a plurality of subframes (301, 401, 501), and placing data within a subframe in the radio frame to produce a subframe of data. The subframe of data comprises either a plurality of OFDM symbols or a plurality of single carrier FDMA symbols, at least two of the OFDM symbols or at least two of the single carrier FDMA symbols in the subframe having different symbol durations. The radio frame and subframe have the same duration for each of the carrier bandwidths in the set of two or more carrier bandwidths. The OFDM symbols or single carrier FDMA symbols in the subframe comprise a plurality of subcarriers and wherein the plurality of symbols and subcarriers in the subframe are grouped into resource blocks such that the carrier bandwidth is divided into an integer number of resource blocks. The at least two OFDM or single carrier FDMA symbols in each of the plurality of subframes differ in cyclic prefix duration by one sample duration corresponding to the smallest carrier bandwidth in the set of two or more carrier bandwidths. The subframe of data is transmitted over the radio frame and in the determined carrier bandwidth. A mobile station or a base station adapted to perform the steps of the method for transmitting data is also disclosed and claimed.