Component Carrier Grouping for Cross-Carrier Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current component carrier grouping methods in wireless communications, particularly in 5G NR systems, face complexity in cross-component carrier scheduling due to different numerologies, leading to increased process requirements, timing value indication complexity, and high blind detection overheads.
Innovation Solution
The method decouples component carrier grouping based on cross-component carrier feedback and scheduling, allowing for simplified aggregation scheduling by grouping carriers with the same subcarrier spacing or time unit length, reducing the number of processes and blind detection overheads, and enabling the terminal to aggregate and feedback information over a single carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If component carriers with different numerologies are grouped together for cross-component carrier scheduling, then scheduling flexibility is improved, but process complexity and timing value indication complexity increase
Solution Approach 1:
The patent segments component carriers into separate groups based on their numerology characteristics (subcarrier spacing, cyclic prefix length). Each group handles carriers with identical numerology parameters, preventing the mixing of different numerologies within a group. This segmentation resolves the contradiction by maintaining scheduling flexibility through multiple groups while reducing process complexity within each group.
Solution Approach 2:
The patent applies local quality by configuring different grouping strategies for different component carriers based on their specific numerology requirements. Each component carrier group is optimized for its local numerology characteristics, allowing tailored scheduling approaches for different subcarrier spacings and cyclic prefix types while maintaining overall system flexibility.
2Adaptability or versatility
If component carriers with different numerologies are grouped together for cross-component carrier scheduling, then scheduling flexibility is improved, but timing value indication complexity increases
Solution Approach 1:
By segmenting component carriers into groups with identical numerology, the patent eliminates the need for complex timing value indications across different numerologies. Within each group, timing relationships are standardized, reducing timing value indication complexity while maintaining scheduling flexibility through inter-group coordination.
3Adaptability or versatility
If component carriers with different numerologies are grouped together for cross-component carrier scheduling, then scheduling flexibility is improved, but blind detection overheads increase
Solution Approach 1:
The patent reduces blind detection overheads by segmenting component carriers into numerology-specific groups. Within each group, the standardized numerology parameters reduce the search space for blind detection operations. The terminal performs blind detection separately for each group rather than across all carriers, significantly reducing overall detection overhead while maintaining scheduling flexibility.
4Device complexity
If component carriers are grouped by same subcarrier spacing and time unit length, then process complexity is reduced, but scheduling flexibility across different numerologies is limited
Solution Approach 1:
The patent achieves universality by creating multiple component carrier groups, each optimized for specific numerology characteristics. The system can selectively activate and schedule across different groups based on service requirements, maintaining flexibility through the multi-group architecture while keeping processing complexity manageable within each group through standardized numerology.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A component carrier grouping method and a device are provided. The method includes: grouping, by a network device, a plurality of component carriers configured for a terminal into at least one component carrier group of a first type, so that the network device sends control information corresponding to a first component carrier to the terminal over a second component carrier, where the first component carrier and the second component carrier belong to a same component carrier group of the first type, and when a plurality of component carriers in at least two component carrier groups of the first type are scheduled, the terminal aggregates feedback information corresponding to the plurality of component carriers and feeds back the aggregated feedback information to the network device over one component carrier; and sending, by the network device, first grouping configuration information to the terminal, where the first grouping configuration information is used to indicate a grouping result of the at least one component carrier group of the first type. According to the foregoing method, a component carrier group grouped based on cross-component carrier feedback and a component carrier group grouped based on cross-component carrier scheduling are decoupled, so that component carrier aggregation scheduling performed by the network device under aggregation of component carriers including different numerologies can be simplified, and a limitation on a terminal power can further be avoided.