Wireless Cross-Slot Scheduling with Configurable PDCCH-PDSCH Offsets
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources, particularly in managing the gap between physical downlink control channels and shared channels, which can lead to increased hardware costs and inefficient buffer usage.
Innovation Solution
A method and device for cross-slot scheduling that involves receiving configuration information to determine the offset between PDCCH and PDSCH, allowing for more precise identification and reception of PDSCH in the appropriate slot and resource, thereby optimizing resource allocation and reducing buffer requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the offset between PDCCH and PDSCH is fixed to 0, then resource allocation is simple, but buffer usage increases and hardware costs increase
Solution Approach 1:
The patent applies dynamics by making the offset value configurable rather than fixed. The network can dynamically adjust the offset between PDCCH and PDSCH based on buffer size requirements, allowing the system to adapt between different operational modes (same-slot scheduling with offset 0, or cross-slot scheduling with offset > 0) to balance complexity and buffer usage.
Solution Approach 2:
The patent changes the parameter of offset value from a fixed constant to a configurable variable. By allowing the offset parameter to be adjusted according to different scenarios and terminal capabilities, the system can optimize the trade-off between hardware complexity and buffer requirements without being constrained by a fixed value.
2Adaptability or versatility
If cross-slot scheduling is implemented, then resource allocation flexibility improves, but scheduling complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure the offset value through higher-layer signaling before actual scheduling occurs. This allows terminals to prepare their buffer and scheduling logic in advance, reducing the complexity of real-time scheduling decisions while maintaining the flexibility of cross-slot scheduling when needed.
3Device complexity
If buffer size is reduced to lower hardware costs, then device complexity decreases, but resource allocation precision worsens
Solution Approach 1:
The patent uses dynamics to allow the offset configuration to adapt to different resource allocation scenarios. When precise resource allocation is needed, the network can configure appropriate offset values that provide sufficient time for buffer processing, thereby maintaining allocation precision even with reduced buffer sizes through optimized timing configurations.
Data Source
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AI summary
In order to perform cross slot scheduling in a wireless communication system, a method of operating a terminal in a wireless communication system may comprise receiving configuration information including information indicating an offset between a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH), configuring a result of adding a value indicated by the configuration information and a predefined value as an offset based on the configuration information indicating an 0-offset, receiving control information through the PDCCH, identifying a slot and resource to which the PDSCH is mapped based on the control information and the offset, and receiving the PDSCH in the identified slot and resource.