Blind Decoding Configuration for Mixed TTI PSCCH Coexistence
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Solution Overview
Problem
In next-generation wireless communication systems, there is a challenge in efficiently coexisting User Equipments (UEs) performing long TTI-based and short TTI-based V2X operations, as they need to perform blind decoding on both types of Physical Sidelink Control Channels (PSCCHs) simultaneously, which increases implementation complexity and requires proper division of blind decoding times.
Innovation Solution
A method where a UE receives a blind decoding configuration from the network to control the number of blind decoding times for both long TTI-based and short TTI-based PSCCHs, allowing for efficient coexistence in a resource pool, especially for UEs with restricted decoding capabilities, by adjusting the division ratio and allocating additional blind decoding times based on capability information and congestion levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE performs blind decoding on both long TTI-based PSCCH and short TTI-based PSCCH simultaneously, then the UE can support mixed TTI operations in the resource pool, but the implementation complexity increases and the UE decoding capability is overloaded
Solution Approach 1:
The patent segments the blind decoding process by dividing the total blind decoding times into separate allocations for long TTI-based PSCCH and short TTI-based PSCCH. The network configures separate parameters (first number of blind decoding times for long TTI, second number of blind decoding times for short TTI) to manage each type independently, reducing the complexity of handling mixed TTI operations simultaneously.
Solution Approach 2:
The patent introduces dynamic configuration where the network can adjust the number of blind decoding times for each TTI type based on current system conditions and UE capabilities. The network dynamically determines the first and second numbers of blind decoding times to ensure the UE does not exceed its decoding capability while still supporting mixed TTI operations.
2Reliability
If the network configures separate blind decoding times for long TTI and short TTI PSCCH, then the UE decoding capability is properly managed, but the configuration complexity increases
Solution Approach 1:
The patent uses a unified blind decoding configuration framework that handles both long TTI and short TTI PSCCH through a single configuration mechanism. The network configures both the first number of blind decoding times for long TTI and the second number for short TTI using the same configuration procedure, simplifying the overall configuration process while maintaining proper capability management.
3Productivity
If UEs with restricted blind decoding capability perform decoding in mixed TTI environment, then resource utilization is optimized, but the UE may fail to decode all required PSCCH
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports its blind decoding capability to the network, and the network uses this information to configure appropriate blind decoding times. The network adjusts the first and second numbers of blind decoding times based on UE capability information, ensuring that UEs with restricted capabilities can successfully decode required PSCCH while optimizing resource utilization.
Data Source
AI summary
A method by which a terminal blind-decodes a PSCCH in a wireless communication system is proposed. The method comprises: receiving a blind decoding configuration from a network; and performing blind decoding in a first TTI on the basis of the configuration, wherein the blind decoding includes: first blind decoding on a first PSCCH on the basis of the first TTI; and second blind decoding on a second PSCCH on the basis of a second TTI shorter than the first TTI, and the configuration controls the number of times of the first blind decoding and/or the number of times of the second blind decoding to be performed by the terminal in the first TTI.