Radio Resource Block Signals for Efficient Data Boundary Detection
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Solution Overview
Problem
In machine-type communication (MTC), the efficient detection of the delimiting position of data transmitted by radio terminal devices is difficult due to varying data sizes and the use of uplink contention-based access, which results in multiple potential candidates for the delimiting position, making it inefficient to demodulate and decode the data.
Innovation Solution
Radio terminal devices generate position indicating signals that are different between blocks of radio resources, mapping these signals with the data, and transmit them. The base station evaluates the continuity of these blocks based on the position indicating signals to demodulate and decode the data accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If uplink contention-based access is used to reduce signaling overhead, then start-up time and power consumption are reduced, but efficient detection of delimiting position becomes difficult
Solution Approach 1:
A delimiting position indicating signal is introduced as an intermediary element to convey information about the delimiting position of data. This signal acts as a mediator between the variable-sized data transmissions and the base station's detection process, enabling efficient identification of delimiting positions without requiring exhaustive testing of multiple candidates.
Solution Approach 2:
The delimiting position information is prepared and transmitted in advance along with the data transmission. By preliminarily indicating the delimiting position through the signal, the base station can directly identify the boundary without performing time-consuming trial demodulations of multiple potential delimiting positions.
2Adaptability or versatility
If data sizes vary between radio terminal devices, then adaptability to different services is improved, but the number of delimiting position candidates increases
Solution Approach 1:
The delimiting position indicating signal serves as an intermediary that resolves the complexity introduced by variable data sizes. Instead of the base station dealing with the complexity of multiple candidates directly, the signal provides a straightforward indication that simplifies the detection process regardless of data size variations.
Solution Approach 2:
The system changes the parameter of data size to accommodate different service requirements while maintaining efficient detection through the indicating signal. The signal adapts to different data sizes by providing appropriate delimiting position information, allowing the system to handle variable parameters without increasing complexity.
3Measurement precision
If all combinations of delimiting positions are tested for demodulation and decoding, then detection accuracy is improved, but processing efficiency deteriorates
Solution Approach 1:
The delimiting position information is extracted and conveyed through a dedicated indicating signal rather than being determined through exhaustive testing. This extraction approach separates the delimiting position identification from the demodulation and decoding processes, allowing accurate detection without the need to test all combinations.
Solution Approach 2:
The delimiting position is preliminarily indicated through the signal before demodulation and decoding occur. This preliminary indication eliminates the need for post-processing trial-and-error approaches, enabling the base station to directly process the correct data segment with high accuracy and efficiency.
Data Source
AI summary
A radio communication method includes: by a radio terminal device, generating position indicating signals that are different between blocks of radio resources each of which is an allocation unit of data; mapping the position indicating signals generated and transmission data to the blocks; and transmitting a signal including the blocks; by a base station device, receiving the signal including the blocks of the radio resources; evaluating continuity of the blocks, based on the position indicating signals mapped to the blocks; and demodulating data mapped to the blocks for each radio terminal device, based on an evaluation result.