PDCCH Candidate Reservation via UE Cooperation
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing and reserving resources for Physical Downlink Control Channel (PDCCH) reception, leading to suboptimal communication reliability and quality due to limitations in PDCCH blind detection capabilities and resource allocation strategies.
Innovation Solution
The implementation of a method where user equipment (UE) establishes communication links with each other to reserve and manage PDCCH candidate resources, allowing for the reception of uncompressed or decoded bits from a base station and cooperative UEs, enhancing PDCCH blind detection limits and resource utilization through UE-to-UE communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a UE reserves multiple PDCCH candidate resources to improve reception reliability, then the PDCCH blind detection capability is exceeded, but resource management efficiency deteriorates
Solution Approach 1:
The patent segments PDCCH candidate resources into two distinct groups: first candidate resources reserved by the UE itself, and second candidate resources reserved by a cooperative UE. This segmentation allows the target UE to receive PDCCH signals through multiple independent paths, improving reliability without requiring the target UE to perform blind detection on all candidates, thus resolving the contradiction between reliability improvement and detection capability limits.
Solution Approach 2:
The patent introduces a cooperative UE as an intermediary that assists in PDCCH reception. The cooperative UE reserves second candidate resources and transmits received PDCCH signals or decoded bits to the target UE. This intermediary mechanism enables the target UE to access additional PDCCH candidates without expanding its own blind detection capability, effectively resolving the technical contradiction.
2Reliability
If a UE monitors all PDCCH candidates independently to ensure reliable reception, then communication reliability improves, but processing time and energy consumption increase
Solution Approach 1:
The cooperative UE performs preliminary actions by pre-reserving second candidate resources and proactively transmitting received PDCCH signals or decoded bits to the target UE. This preliminary action allows the target UE to receive PDCCH information without performing time-consuming blind detection on all candidates, thereby improving reliability while reducing processing time and energy consumption.
3Productivity
If traditional independent resource reservation is used, then UE implementation is simple, but resource utilization efficiency is suboptimal
Solution Approach 1:
The patent merges the resource reservation functions of multiple UEs by allowing a cooperative UE to reserve second candidate resources on behalf of a target UE. This merging approach improves resource utilization efficiency by enabling collaborative resource management, while the standardized interface and protocol for cooperative operation keep the implementation complexity manageable.
Data Source
AI summary
To facilitate UE cooperation for DCI reception, methods, apparatuses, and computer-readable storage medium are provided. An example method includes establishing a communication link with a second UE. The example method further includes reserving at least one of one or more first candidate resources or one or more second candidate resources of a plurality of candidate resources for a PDCCH reception. The example method further includes receiving, from a base station, an indication of the one or more first candidate resources for the PDCCH reception. The example method further includes receiving, from the second UE, at least one of one or more uncompressed bits corresponding to the one or more second candidate resources or one or more decoded bits corresponding to a reservation of the one or more second candidate resources.