Uplink Resource Grant Search Space Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the imbalance between uplink and downlink coverage and service requirements leads to increased power consumption due to the need for extensive blind detections in cross-carrier scheduling, where uplink resources are scheduled using downlink resources, resulting in inefficient use of terminal capabilities.
Innovation Solution
A method and apparatus for configuring uplink resources that allow for reduced blind detections by decoupling uplink and downlink resource usage, enabling flexible pairing of uplink and downlink resources across different carriers, and using index or frequency channel numbers to indicate resources, thereby reducing the amount of information transmitted over the air interface and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-carrier scheduling is used to schedule uplink resources using downlink resources, then uplink and downlink decoupling is achieved, but the terminal needs to perform a large quantity of blind detections, resulting in relatively large power consumption
Solution Approach 1:
The patent segments the search space into multiple candidate sets, each associated with different carriers. The terminal performs blind detections on these segmented candidate sets rather than a single large set, which reduces the complexity and power consumption of the detection process while maintaining the ability to schedule uplink resources across multiple carriers.
Solution Approach 2:
The patent implements partial blind detections by configuring multiple search space candidate sets with different sizes and positions. The terminal performs detections on a subset of these candidates based on carrier-specific parameters, achieving the necessary scheduling functionality without requiring exhaustive blind detections across all possible candidates, thus reducing power consumption.
2Adaptability or versatility
If uplink and downlink resources are coupled on the same carrier, then scheduling is simplified, but uplink coverage and downlink coverage cannot adapt to imbalance between coverage or service requirements
Solution Approach 1:
The patent creates a universal search space configuration that can serve multiple carriers with different coverage and service requirements. The same search space structure is used across carriers, but with configurable parameters that adapt to each carrier's specific needs, enabling both uplink and downlink resources to be scheduled flexibly without increasing overall system complexity.
Solution Approach 2:
The patent applies local quality by configuring carrier-specific parameters within the search space structure. Each carrier can have its own search space candidate set with customized size, position, and other parameters tailored to its specific coverage and service requirements, while maintaining consistency with the overall search space framework.
Data Source
AI summary
An uplink resource grant method includes receiving, by a terminal, configuration information from a network device, where the configuration information includes information about a first uplink resource and information about a second uplink resource, and searching, by the terminal, a search space for a downlink control channel to obtain grant information. The search space includes a first control channel candidate set when the downlink control channel carries grant information of the first (or the second) uplink resource, and the search space includes a second control channel candidate set when the downlink control channel carries grant information of the second (or the first) uplink resource or grant information of a downlink resource. The first control channel candidate set is the same as the second control channel candidate set.