Dynamic Buffer Configuration for MTC Signal Processing
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in signal processing and transmission, particularly for Machine Type Communication (MTC), where existing methods do not effectively optimize subframe configurations to reduce reception buffer size and adapt to varying cyclic prefix settings, leading to suboptimal data transmission and increased overhead.
Innovation Solution
A method and apparatus for efficiently processing signals in a wireless communication system by configuring subframe reception buffers based on subframe configurations, including storing downlink signals in separate buffers for control and data channels, with adjustable sizes according to cyclic prefix settings, allowing for flexible allocation of resource blocks and OFDM symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed-size reception buffer is used for all subframe configurations, then device complexity is reduced, but signal processing efficiency deteriorates due to suboptimal buffer usage
Solution Approach 1:
The patent implements dynamic buffer size configuration where the reception buffer size is adjusted according to the cyclic prefix type (normal or extended) detected in each subframe. When normal CP is detected, the buffer is configured for N1 resource blocks; when extended CP is detected, the buffer is configured for N2 resource blocks. This dynamic adaptation optimizes signal processing efficiency for different subframe configurations without requiring permanently allocated large buffers.
Solution Approach 2:
The patent changes the buffer configuration parameters (size and resource block allocation) based on the detected cyclic prefix type. The system transitions between two distinct buffer configurations (N1 for normal CP, N2 for extended CP) by detecting the CP type and applying the corresponding parameter set, thereby optimizing processing efficiency for each scenario.
2Adaptability or versatility
If reception buffer size is increased to accommodate all subframe configurations, then adaptability is improved, but device complexity and overhead increase
Solution Approach 1:
The system achieves adaptability to different subframe configurations (normal and extended CP) through dynamic buffer reconfiguration rather than permanently allocating the largest possible buffer. The buffer size changes based on the detected CP type, allowing the system to adapt to different configurations while maintaining low overhead by only allocating the necessary buffer size for the current configuration.
Solution Approach 2:
The user equipment automatically detects the cyclic prefix type in received subframes and self-configures the reception buffer size accordingly without requiring external control signals or manual intervention. This self-service mechanism enables adaptability while minimizing overhead by precisely matching buffer allocation to actual needs.
3Measurement precision
If separate buffers are allocated for control and data channels, then signal processing precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the reception buffer into separate logical sections for control channels and data channels within the allocated resource blocks. This segmentation allows independent processing and optimization of control and data signal reception, improving accuracy by preventing interference between different signal types while using a single physically allocated buffer structure.
Data Source
AI summary
The present invention relates to a wireless communication system. Particularly, the present invention relates to a method by which a terminal receives a downlink signal in a wireless communication system and a device therefor, and the method comprises the steps of: acquiring information on a subframe configuration; receiving a subframe including a first time domain and a second time domain; and storing, in a first receiving buffer, a downlink signal on a receiving band in the second time domain of the subframe, wherein the size of the receiving band is set differently according to each subframe configuration by using the information on the subframe configuration.