PDCCH Blind Detection With Configurable DCI Size Limits
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Solution Overview
Problem
The challenge in wireless communication systems is the increased complexity and reduced bandwidth due to the fixed number of candidate DCI sizes in PDCCH blind detection, leading to artificial size adjustments of DCI that degrade network performance.
Innovation Solution
Implementing a configurable number of DCI sizes based on specific conditions or parameters, allowing the UE to monitor up to a DCI size limit, thereby aligning DCI sizes naturally without artificial adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of candidate DCI sizes is increased to improve DCI size alignment flexibility, then the adaptability of DCI size matching is improved, but the device complexity of PDCCH blind detection increases
Solution Approach 1:
The patent applies dynamics by making the number of candidate DCI sizes configurable rather than fixed. The UE can be configured with different numbers of candidate DCI sizes (e.g., 2, 3, or 4 sizes) depending on network conditions and requirements. This allows the system to adapt dynamically between flexibility and complexity based on actual operational needs, resolving the contradiction between adaptability and device complexity.
2Device complexity
If the number of PDCCH blind detection operations is limited to reduce device complexity, then the device complexity is reduced, but the loss of information occurs when DCI size does not match candidate sizes
Solution Approach 1:
The patent applies parameter changes by allowing the number of candidate DCI sizes to be configured as a variable parameter rather than being fixed. The network can configure the UE with different numbers of candidate DCI sizes based on the specific deployment scenario and requirements. This enables the system to adjust the balance between detection operation limits and information accuracy loss prevention.
3Device complexity
If DCI size is artificially adjusted via zero padding or truncation to fit candidate DCI sizes, then the device complexity is reduced, but the loss of energy occurs due to reduced bandwidth and throughput
Solution Approach 1:
The patent applies dynamics by implementing a configurable number of candidate DCI sizes that can be adjusted based on network conditions. Instead of using fixed artificial adjustments (zero padding or truncation), the system can dynamically configure the UE to monitor different numbers of DCI sizes, allowing for more natural DCI size alignment that preserves bandwidth and throughput efficiency while reducing the need for artificial modifications.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication, and to a physical downlink control channel (PDCCH) blind detection procedure with a configurable number of downlink control information (DCI) sizes. For example, a user equipment (UE) identifies a DCI size limit related to a PDCCH blind detection mode or a total number of PDCCH candidates to be monitored. The DCI size limit may be preprogrammed at the UE, such as with a value specified by a wireless communication standard, or signaled by a network node. In accordance with identifying the DCI size limit, the UE performs blind detection operations on a set of PDCCH candidates in which the UE monitors each of a set of candidate DCI sizes within the DCI size limit. Successful performance of the blind detection operations may identify a PDCCH candidate that includes control information from the network node.