Cross-Carrier Scheduling With CORESET Pool Index
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Solution Overview
Problem
Current wireless networks fail to configure a Control Resource Set (CORESET) for cross-carrier scheduled cells, preventing multi-DCI based multi-TRP operations and joint Type-1 HARQ-ACK feedback, which are essential for efficient communication in heterogeneous networks.
Innovation Solution
The implementation of cross-carrier scheduling in wireless devices, where a scheduling cell provides downlink control information (DCI) with a Carrier Indicator Field (CIF) to associate with a CORESET pool index, enabling cross-carrier scheduling between multiple transmit-receive points (TRPs) and allowing for multi-DCI based multi-TRP communications and joint HARQ-ACK feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If cross-carrier scheduling is implemented without CORESET configuration, then carrier aggregation bandwidth is increased, but multi-DCI based multi-TRP operations cannot be performed
Solution Approach 1:
The patent segments the CORESET configuration by introducing a CORESET pool index that can take different values (e.g., 0 or 1). This allows the system to maintain CORESET configurations necessary for multi-DCI operations while enabling cross-carrier scheduling. Each TRP can be associated with a specific CORESET pool index, enabling differentiated handling of control resources across carriers.
Solution Approach 2:
The patent makes the CORESET configuration universal by allowing the same scheduling cell to serve multiple functions: it can schedule both its own cell and other cells through cross-carrier scheduling, while maintaining the necessary CORESET structures. The CORESET pool index mechanism allows a single CORESET configuration to support multiple TRPs and multiple DCI formats simultaneously.
2Device complexity
If cross-carrier scheduling is implemented without CORESET pool index, then system complexity is reduced, but joint Type-1 HARQ-ACK feedback cannot be achieved
Solution Approach 1:
The patent applies local quality by introducing the CORESET pool index specifically where needed - in the CORESET configuration and DCI association mechanisms - rather than throughout the entire system. This localized addition enables joint HARQ-ACK feedback functionality without unnecessarily complicating other parts of the system. The index is only relevant when multi-DCI operations are required.
3Adaptability or versatility
If multiple scheduling cells are configured for a scheduled cell, then scheduling flexibility is improved, but difficulty of detecting and measuring DCI associations increases
Solution Approach 1:
The patent uses the CORESET pool index as a distinguishing identifier (like a color code) to differentiate between DCIs from different scheduling cells. Each scheduling cell can be associated with a specific CORESET pool index value, making it easy for the wireless device to identify which scheduling cell a particular DCI originates from, even when multiple scheduling cells are configured.
Data Source
AI summary
This disclosure provides systems, methods and apparatus, and computer programs encoded on computer storage media, for managing cross-carrier scheduling by a processor of a wireless device. In one aspect, a wireless device may determine that a scheduled cell is configured to be scheduled by a scheduling cell. The wireless device may receive downlink control information (DCI) from a scheduling cell. The wireless device may determine an association of the DCI and an index based on the received DCI. The wireless device may perform cross-carrier scheduling of communications with a first transmit-receive point (TRP) or a second TRP based on the DCI and the associated index.