Downlink Control Channel Blind Detection Period Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In existing Long Term Evolution (LTE) systems, there is no clear solution for determining a time-frequency resource for User Equipment (UE) to monitor a downlink control channel, which is essential for flexible data transmission at varying time intervals and subcarrier spacings in future mobile communication systems.
Innovation Solution
A method and device are provided to determine a blind detection period parameter for the downlink control channel, comprising an offset value and/or a period value, which indicates the time domain resource for the UE to detect and receive the downlink control channel, allowing the base station to configure these parameters to optimize monitoring periods based on different service types and application scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the downlink control channel is transmitted on every sub-frame with fixed TTI length, then the system maintains simple structure and compatibility with existing LTE, but the system lacks flexibility to support different service types and varying time intervals
Solution Approach 1:
The patent introduces dynamic parameters (blind detection period parameter, offset value, period value) that allow the downlink control channel transmission to adapt to different service types and time intervals. The base station can configure different monitoring periods for different UEs or services, transforming the static fixed-TTI structure into a dynamic flexible structure that supports varying time intervals while maintaining manageable complexity through standardized parameter configuration
Solution Approach 2:
The patent changes the parameter of TTI length from a fixed value to a configurable parameter. By introducing the blind detection period parameter with different period values, the system can adjust the time interval between downlink control channel transmissions according to different service requirements, enabling support for both frequent and infrequent transmission scenarios
2Reliability
If the UE monitors the downlink control channel in every non-DRX sub-frame, then the UE can detect all possible control information, but the power consumption increases
Solution Approach 1:
The patent implements periodic monitoring of the downlink control channel by configuring a blind detection period parameter. Instead of monitoring every sub-frame, the UE monitors the control channel at regular intervals determined by the period value. This periodic action maintains detection reliability for services that require it while significantly reducing power consumption by allowing the UE to enter sleep mode between monitoring periods
Solution Approach 2:
The patent allows the system to configure different monitoring frequencies based on service requirements. For services that do not require frequent updates, the UE can monitor the control channel less frequently (partial action), reducing power consumption. The network can allocate more monitoring resources when needed, creating a flexible approach that balances reliability and energy consumption
3Productivity
If the blind detection period parameter is configured by the base station, then the system achieves optimal performance for specific scenarios, but the configuration complexity and signaling overhead increase
Solution Approach 1:
The patent creates a universal configuration mechanism where the base station configures blind detection period parameters that can serve multiple purposes and service types. The same parameter configuration framework supports different period values for different services, making the system multi-functional without requiring separate configuration mechanisms for each service type, thus achieving productivity improvement without proportional increase in complexity
Data Source
AI summary
A method and device of transmitting a downlink control channel, a method and device of detecting and receiving a downlink control channel are provided. The method includes: determining a blind detection period parameter of the downlink control channel; and transmitting the downlink control channel based the blind detection period parameter of the downlink control channel.