Blind Detection Allocation for Overlapping 5G Search Spaces
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Solution Overview
Problem
In 5G NR communications, the conventional downlink control information transmission method is inadequate as it leads to excessive blind detection times in overlapping search spaces, wasting terminal device capability and exceeding maximum allowed detection times.
Innovation Solution
A method for a terminal device to determine the existence of multiple search spaces within a preset time duration and perform blind detection based on specific information, ensuring total blind detection times do not exceed the maximum allowed, by allocating detection times efficiently across search spaces and prioritizing detection in overlapping moments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device performs blind detection in multiple independent search spaces with different periods and offsets, then the downlink control information transmission flexibility is improved, but the total quantity of blind detection times exceeds the maximum allowed value at overlapping moments
Solution Approach 1:
The patent changes the parameter of blind detection quantity allocation dynamically. When search spaces overlap, the system adjusts the blind detection quantity for each search space based on the overlap situation, ensuring the total does not exceed the terminal device's maximum capability. This parameter adjustment resolves the contradiction by adapting the detection allocation to the actual transmission flexibility requirements while maintaining reliability.
Solution Approach 2:
The patent implements dynamic blind detection quantity allocation where the detection quantity for each search space is not fixed but adjusts according to the overlap situation. The network device determines the blind detection quantity dynamically based on whether search spaces overlap at the terminal device, allowing the system to maintain both flexibility in search space configuration and reliability within detection capability limits.
2Reliability
If the quantity of blind detection times in each search space is reduced to avoid exceeding the maximum value at overlapping moments, then the blind detection capability overflow is prevented, but the blind detection capability of the terminal device is wasted at non-overlapping moments
Solution Approach 1:
The patent applies dynamic allocation of blind detection quantities that adjust based on the overlap status of search spaces. When search spaces do not overlap, the terminal device can utilize the full blind detection capability for each search space. When they overlap, the allocation is dynamically adjusted to prevent exceeding the maximum. This dynamic approach resolves the contradiction by ensuring high productivity during non-overlapping periods while maintaining reliability during overlapping periods.
Solution Approach 2:
The network device performs preliminary determination of blind detection quantities before the terminal device performs blind detection. By calculating and indicating the appropriate blind detection quantity in advance based on the search space configuration and potential overlaps, the system prepares the terminal device to efficiently utilize its capability without risking overflow, thus resolving the contradiction between capability utilization and overflow prevention.
3Adaptability or versatility
If multiple search spaces are configured with different periods and offsets, then the search space configuration flexibility is improved, but the complexity of managing blind detection times across overlapping search spaces increases
Solution Approach 1:
The network device acts as an intermediary that manages the blind detection quantity allocation for multiple search spaces. Instead of the terminal device independently managing complex blind detection schedules across multiple search spaces with different periods and offsets, the network device calculates the appropriate quantities and provides clear indications to the terminal device. This intermediary management reduces the complexity at the terminal device while maintaining the flexibility benefits of multiple search spaces.
Solution Approach 2:
The patent uses parameter changes in the blind detection quantity indication to simplify management. By adjusting the blind detection quantity parameter based on the search space configuration and overlap situations, the system maintains flexible search space configurations while simplifying the terminal device's management burden. The network device handles the complexity of calculating appropriate quantities, and the terminal device simply follows the indicated parameters.
Data Source
AI summary
The present disclosure relates to methods for obtaining a quantity of blind detection times, and apparatus. One example method comprises receiving, by a terminal device, second information from a network device, where the second information comprises subcarrier spacing information, and determining, by the terminal device based on the subcarrier spacing information, a maximum quantity of blind detection times for the terminal device in a search space.