Control Channel Mapping Across Component Carriers
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Solution Overview
Problem
In multi-carrier communication systems, the limited search space for control channels leads to a high impact probability, causing partial data transmission failures for User Equipment (UE) due to overlapping search spaces and limited resource scheduling.
Innovation Solution
The method involves determining a unique search space for each object, such as a component carrier, within the same aggregation level, allowing for flexible configuration and mapping of control channels to reduce collisions and ensure successful data transmission by adjusting the initial location and size of the search space based on feature parameters and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If all PDCCHs for one UE are transmitted on one component carrier, then device complexity is reduced, but reliability deteriorates due to high impact probability and control channel transmission failures
Solution Approach 1:
The patent segments the control channel transmission by dividing PDCCHs into multiple search spaces across different component carriers. Instead of concentrating all PDCCHs on one carrier, the search spaces are distributed across multiple carriers, so that control channel transmissions are segmented and dispersed, reducing the impact probability on any single carrier while maintaining transmission reliability.
2Productivity
If search space size is increased to accommodate more control channels, then productivity improves, but device complexity increases due to larger search space requirements
Solution Approach 1:
The patent transitions from a single-dimension search space (one large search space on one carrier) to a multi-dimensional search space structure by distributing search spaces across multiple component carriers. This dimensional expansion allows the system to accommodate more control channels by utilizing the carrier dimension, thereby increasing control channel capacity without requiring an excessively large search space on a single carrier.
Data Source
AI summary
A control channel mapping method is provided, which includes: determining a search space corresponding to each object for a same aggregation level, where more than one object exist and are determined according to a component carrier; and mapping a control channel corresponding to the object into the determined search space. A detection method is further provided, which includes: determining an initial location of a search space corresponding to the object, where more than one search space exist for the same aggregation level, and the object is determined according to a component carrier, and determining a size of the search space corresponding to the object; and detecting a control channel in the determined search space. A User Equipment (UE) and a network equipment are also provided. Therefore, the collision of control channels is reduced, and an impact probability of control channels is reduced.