Dynamic TTI Resource Indication via DCI Signaling
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Solution Overview
Problem
Current mobile communication systems face challenges in dynamically configuring Transmission Time Interval (TTI) and transmission resources, making it difficult for User Equipment (UE) to determine the appropriate transmission resources, especially when supporting various types of services.
Innovation Solution
The UE receives Downlink Control Information (DCI) from the base station, which includes indication information for TTI length, time-domain position, and frequency-domain position of the transmission resource, allowing the UE to determine and utilize the transmission resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TTI is dynamically configured to support more types of services, then service adaptability is improved, but UE's ability to determine transmission resources deteriorates
Solution Approach 1:
The patent applies dynamics by making the TTI configuration flexible and service-specific. Different TTIs (1ms, 0.5ms, 0.25ms) can be dynamically selected based on service requirements, and the network can dynamically configure which TTI length to use through RRC signaling and DCI indicators, allowing the system to adapt to varying service needs while maintaining clear resource indication mechanisms
Solution Approach 2:
The patent introduces an intermediary mechanism through the use of DCI format indicators and RRC-configured parameter sets. These intermediaries bridge the gap between dynamic TTI configuration and UE resource determination by providing structured indication methods that tell the UE how to interpret resource allocations for different TTI lengths without requiring the UE to independently determine complex resource parameters
2Adaptability or versatility
If TTI length is dynamically configured, then resource configuration flexibility is improved, but transmission resource determination complexity increases
Solution Approach 1:
The patent segments the resource configuration into distinct components: RRC-configured parameter sets, DCI format indicators, and specific resource allocation fields. This segmentation allows each component to handle a specific aspect of the configuration, reducing the overall complexity by breaking down the determination process into manageable, modular steps rather than requiring the UE to process all parameters simultaneously
Solution Approach 2:
The patent uses parameter changes by introducing indication fields in DCI that specify which RRC-configured parameter set to use and what TTI length to apply. Instead of hardcoding complex resource determination logic, the system changes parameters dynamically through signaling, allowing the UE to adapt its resource determination based on received indicators while keeping the underlying determination rules relatively simple and standardized
Data Source
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AI summary
A transmission resource indication method, a base station, a UE and a transmission resource indication system are provided. The transmission resource indication method includes: receiving, by a UE, DCI from a base station, the DCI including indication information indicating one or more of a TTI length for a transmission resource, a time-domain position of the transmission resource and a frequency-domain of the transmission resource; and determining, by the UE, the transmission resource in accordance with the indication information and performing transmission on the transmission resource.