Terminal Device Transmission Parameter Scaling for 64QAM Support
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Solution Overview
Problem
In the Rel-15 Internet of vehicles system, there is a need to configure transmission parameters based on a new MCS table, which is not directly supported by existing Rel-14 systems, particularly for supporting 64QAM modulation, requiring a method to determine suitable transmission parameters for terminal devices.
Innovation Solution
A method where terminal devices determine transmission parameters using Channel Busy Ratio (CBR) and service priority, with the aid of proportion coefficients and mapping relationships, to adapt existing parameters to meet Rel-15 requirements, allowing for the configuration of MCS ranges, PRB number ranges, or sub-band number ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new MCS table is introduced for Rel-15 to support 64QAM modulation, then the system can meet higher transmission requirements, but existing Rel-14 transmission parameters become incompatible and cannot be directly used
Solution Approach 1:
The patent applies parameter changes by introducing proportion coefficients (e.g., 1.25, 1.5, 2.0) that scale existing Rel-14 transmission parameters to derive appropriate Rel-15 parameters. This allows the system to adapt to the new MCS table and 64QAM requirements while maintaining compatibility with existing parameter structures, thus resolving the contradiction between supporting new modulation and managing configuration complexity.
Solution Approach 2:
The patent introduces mapping relationships as intermediary elements that bridge the gap between Rel-14 transmission parameters and Rel-15 requirements. These mapping relationships serve as a translation layer, converting existing parameters into forms suitable for the new MCS table without requiring complete reconfiguration, thereby reducing the complexity burden while enabling 64QAM support.
2Reliability
If transmission parameters are determined based on CBR and service priority with proportion coefficients, then Rel-15 transmission requirements are met, but the parameter determination process becomes more complex compared to existing systems
Solution Approach 1:
The patent applies preliminary action by pre-defining mapping relationships and proportion coefficients that encode the complex transformation logic between Rel-14 and Rel-15 parameters. These pre-configured elements allow terminal devices to determine Rel-15 transmission parameters through simpler lookups and calculations rather than complex real-time optimization, thus improving reliability while managing the complexity burden.
Solution Approach 2:
The patent uses parameter changes by systematically transforming existing transmission parameters through defined proportion coefficients based on CBR and service priority. This structured parameter transformation approach ensures that Rel-15 parameter determination maintains reliability through consistent scaling relationships while reducing the perceived complexity by providing clear transformation rules rather than requiring complex algorithms.
Data Source
AI summary
Provided are a transmission parameter determination method, a terminal device and a network device. The method comprises: the terminal device determines a first transmission parameter according to the channel busy ratio (CBR) and the priority of service to be transmitted; and the terminal device sends the service to be transmitted using the first transmission parameter, and further comprises: the terminal device acquires at least one proportion coefficient, the at least one proportion coefficient being configured by a network device or pre-configured in the terminal device, wherein the operation of determining the first transmission parameter according to the CBR and the priority of the service to be transmitted comprises: the terminal device determines a second transmission parameter according to the CBR and the priority of the service to be transmitted, and processes the second transmission parameter using the at least one proportion coefficient to obtain the first transmission parameter.