5G Data Frame Subframe Mapping for Service Requirements
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Solution Overview
Problem
Current 5G mobile communication systems have a low service level due to inconsistent or mutually exclusive service requirements such as high capacity, low latency, massive connection, high reliability, and high mobility, which existing subframes with identical data structures cannot effectively meet.
Innovation Solution
A data frame implementation method that configures at least two subframe types with fixed lengths, allowing them to be mapped to different frequency bands with varying subcarrier spacings, where the number of symbols in each subframe corresponds to the subcarrier spacing of the mapped frequency band, enabling flexible assembly to meet diverse service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wide subcarrier spacing is used, then high mobility is improved, but coherent bandwidth is reduced
Solution Approach 1:
The system divides the frequency band into multiple subbands, each with its own subcarrier spacing configuration. This allows different portions of the spectrum to be optimized for different services - some subbands can use wide spacing for mobility while others use narrow spacing for coherent bandwidth, resolving the contradiction through spatial segmentation in the frequency domain.
Solution Approach 2:
Different subcarrier spacings are assigned to different subbands based on local service requirements. Each subband can have customized parameters (subcarrier spacing, symbol length, cyclic prefix) optimized for its specific service type, allowing simultaneous optimization for both mobility and coherent bandwidth in different frequency regions.
2Device complexity
If subframes have identical data structure, then system simplicity is maintained, but service adaptability is reduced
Solution Approach 1:
The subframe structure is made dynamic and configurable rather than fixed. Different subframe types with varying parameters (symbol quantity, subcarrier spacing, cyclic prefix length) can be selected and assembled based on service requirements. This dynamic configuration allows the system to adapt to diverse services while maintaining a standardized framework for assembly.
Solution Approach 2:
A universal subframe assembly mechanism is provided that can accommodate multiple service types through configurable parameters. The same basic subframe structure can be adapted for different services by adjusting subcarrier spacing, symbol count, and cyclic prefix settings, making the system multi-functional without requiring completely separate structures for each service.
3Reliability
If subcarrier spacing is increased, then Doppler spread resistance is improved, but symbol duration is reduced
Solution Approach 1:
Different subcarrier spacings are assigned to different subbands based on local service requirements. Services experiencing high Doppler spread can utilize subbands with wider spacing and correspondingly shorter symbols, while other services can use subbands with narrower spacing and longer symbols, allowing each service to operate under locally optimized conditions.
Data Source
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AI summary
Embodiments of the present invention disclose a data frame implementation method and apparatus. The method may include: configuring a data frame used for radio signal transmission, where the data frame includes at least two subframes, each subframe has a fixed length, the at least two subframes may be mapped to at least two frequency bands with different subcarrier spacings, and a quantity of symbols included in each subframe is corresponding to a subcarrier spacing of a frequency band to which the subframe is mapped. According to the embodiments of the present invention, various service requirements of 5G mobile communication can be met and a service level of the 5G mobile communication can be improved.