Scheduling Assignment Search Space Segmentation for Multi-Carrier Wireless
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting scheduling assignments (SAs) across multiple Component Carriers (CCs), leading to increased decoding operations for advanced-UEs and potential decoding errors, while also requiring efficient multiplexing of Control Channel Elements (CCEs) for both legacy-UEs and advanced-UEs without disrupting legacy-UE decoding processes.
Innovation Solution
The solution involves configuring advanced-UEs with a primary and secondary Component Carrier (CC) for SA transmission, where CCEs for advanced-UEs are determined from those in the primary CC, minimizing decoding operations and improving detection reliability by maintaining similar complexity to legacy-UE decoding processes, and using explicit or implicit indexing to indicate secondary CCs for SA transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scheduling assignments are transmitted across multiple Component Carriers for advanced-UEs, then scheduling flexibility and throughput are improved, but the number of decoding operations increases and detection reliability decreases
Solution Approach 1:
The patent divides the search space for scheduling assignments into multiple distinct regions across different Component Carriers. Advanced-UEs are configured with specific search space sets that are segmented by carrier frequency, allowing the UE to systematically search for SAs in organized segments rather than blindly decoding all possible locations across all carriers, thus maintaining reliability while enabling multi-carrier scheduling.
Solution Approach 2:
The patent establishes predetermined search space configurations and SA transmission patterns before actual scheduling occurs. The network configures advanced-UEs with specific search space sets, aggregation levels, and candidate locations in advance, so that when SA transmission occurs, the UE can efficiently search within pre-defined boundaries rather than performing exhaustive decoding operations across all possible locations.
2Productivity
If scheduling assignments are transmitted across multiple Component Carriers for advanced-UEs, then scheduling flexibility and throughput are improved, but the number of decoding operations increases
Solution Approach 1:
The patent segments the search space into multiple controlled regions across Component Carriers, each with defined aggregation levels and candidate locations. This segmentation allows advanced-UEs to perform decoding operations in an organized manner across carriers rather than attempting to decode all possible locations simultaneously, reducing the overall decoding complexity while maintaining multi-carrier scheduling capability.
Solution Approach 2:
The patent applies different search space configurations and aggregation levels to different Component Carriers based on local conditions such as channel quality and scheduling requirements. Each carrier can have optimized search space parameters tailored to its specific characteristics, allowing efficient decoding operations adapted to local conditions rather than using a uniform approach across all carriers.
3Productivity
If Control Channel Elements are multiplexed for both legacy-UEs and advanced-UEs, then resource utilization is improved, but legacy-UE decoding processes are disrupted
Solution Approach 1:
The patent segments the search space into legacy-UE search spaces and advanced-UE search spaces that are distinct and non-overlapping. Legacy-UEs continue to search in their traditional search spaces without any changes to their decoding processes, while advanced-UEs search in separately configured search spaces. This segmentation allows both types of UEs to operate independently without interference, maintaining legacy simplicity while enabling advanced features.
Solution Approach 2:
The patent introduces search space configuration parameters as intermediaries that separate legacy-UE and advanced-UE operations. These configuration parameters act as a mediator layer that allows the network to independently control search space allocation for each UE type, enabling resource multiplexing while preserving legacy-UE decoding simplicity through proper configuration management.
Data Source
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AI summary
A method for a wireless communication is disclosed. The method comprises: receiving a scheduling assignment in a search space on a primary component carrier, the scheduling assignment comprising information indicating a component carrier in which data is transmitted; and receiving the data on the indicated component carrier. The search space for the primary component carrier is different from a search space for a secondary component carrier.