Uplink Scheduling Grant Control for Flexible Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing HSUPA system's scheduling method is not flexible enough, particularly when TDM scheduling is introduced, leading to bottlenecks in scheduling performance due to inflexible selection of the starting moment for uplink data transmission.
Innovation Solution
A scheduling grant control method that allows user equipment to flexibly select different starting moments based on grant information, using multiple grant value sets with defined timing relationships to adjust transmission on the uplink data channel, enabling the UE to start or stop transmission at specific subframes, thereby improving scheduling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed timing relationship is used between grant reception and transmission start, then the system operation is simple, but the scheduling flexibility is insufficient
Solution Approach 1:
The grant value range is segmented into multiple grant value sets, each associated with a different timing relationship. This allows the system to select appropriate timing relationships based on scheduling requirements, improving flexibility without requiring a single complex timing relationship to cover all cases.
Solution Approach 2:
The timing relationship between grant reception and transmission start is made dynamic by allowing selection from multiple predefined timing relationships based on the grant value. This enables the system to adapt the timing according to different scheduling scenarios while maintaining manageable complexity through predefined options.
2Productivity
If multiple grant value sets with different timing relationships are introduced, then the scheduling performance is improved, but the system complexity increases
Solution Approach 1:
Multiple timing relationships are predefined and associated with different grant value sets before actual scheduling operations. This preliminary configuration allows the UE to quickly determine the appropriate timing relationship based on the received grant value, improving scheduling performance without requiring complex real-time calculations.
Solution Approach 2:
The system changes the timing relationship parameter based on the grant value received. By linking different timing relationships to different grant value sets, the system can optimize scheduling performance for different scenarios while managing complexity through parameter-based selection rather than complex logic.
3Reliability
If the UE determines transmission start moment based on fixed rules, then the implementation is simple, but the ability to avoid transmission gaps and interference is limited
Solution Approach 1:
The system uses feedback from the grant value received from the network to determine the appropriate timing relationship and transmission start moment. This feedback mechanism enables the UE to adaptively avoid transmission gaps and interference while maintaining relatively simple operation through automated selection based on the grant value.
Solution Approach 2:
The grant value acts as an intermediary that carries scheduling information from the network to the UE. By encoding timing relationship information in the grant value, the system enables the UE to determine the appropriate transmission start moment without complex direct control signals, improving reliability while keeping operations manageable.
Data Source
AI summary
A scheduling grant control method, user equipment, and a network device are disclosed. The method includes: receiving grant information sent by a network device, where the grant information indicates a grant value of data transmission on an uplink data channel by user equipment; determining an effectively starting moment of the grant information according to the grant value and a reception moment at which the grant information is received; and adjusting, on the uplink data channel and based on the grant value, transmission of the data at the effectively starting moment. Based on the foregoing technical solutions, in the scheduling grant control method in embodiments of the present invention, after receiving grant information, UE may flexibly select different effectively starting moments according to different grant information.