PUR DCI Format for Preconfigured Uplink Resource Overlap Handling
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Solution Overview
Problem
The existing technologies face challenges in designing a unified Downlink Control Information (DCI) for different Coverage Enhancement (CE) modes and optimizing or reducing DCI to improve MPDCCH/NPDCCH detection performance, particularly in scenarios where the Preconfigured Uplink Resource (PUR) search space overlaps with other search spaces, leading to uncertainty about UE behavior during overlapping conditions.
Innovation Solution
The proposed solution involves designing a new DCI format, referred to as PUR DCI, which includes specific fields for ACK/NACK indication, updated parameters like TA and power, retransmission type, and scheduling delay, along with options for fallback and resource release, configured based on coverage modes, and determining search space monitoring based on predefined periods or indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a unified DCI format is designed for different CE modes, then device complexity is reduced and ease of operation is improved, but the number of bits required for parameter indication increases
Solution Approach 1:
The patent implements dynamic DCI formats that can be adapted based on CE mode and search space conditions. The DCI format dynamically adjusts its content and structure depending on whether the UE is in CE mode A or B, and whether search space overlap is detected, allowing a single unified format design to serve multiple scenarios without requiring excessive bits in all cases
Solution Approach 2:
The patent applies local quality by providing different DCI format configurations for different CE modes and search space conditions. Instead of using a single fixed format for all scenarios, the system tailors the DCI content locally based on the specific CE mode and overlap situation, reducing the number of bits required while maintaining unified format design benefits
2Reliability
If DCI is optimized or reduced for improved detection performance, then reliability is improved, but the amount of control information that can be conveyed is reduced
Solution Approach 1:
The patent segments control information into different DCI formats and search spaces based on CE mode and overlap conditions. By dividing the control information into targeted segments rather than transmitting all possible parameters in every DCI, the system improves detection performance and reliability while conveying only the necessary information for each specific scenario
Solution Approach 2:
The patent applies partial action by including only the necessary subset of control information parameters in each DCI format based on the specific CE mode and search space conditions. Rather than transmitting complete control information in all cases, the system transmits only the partial set of parameters needed for the current scenario, improving detection performance while avoiding information loss through selective inclusion
3Productivity
If the PUR search space overlaps with other search spaces, then resource utilization is improved, but uncertainty about UE behavior increases and reliability decreases
Solution Approach 1:
The patent implements preliminary action by pre-defining UE behavior rules for search space overlap conditions before the overlap occurs. The specification establishes clear procedures in advance for how UEs should handle MPDCCH/NPDCCH detection when PUR search space overlaps with other search spaces, eliminating uncertainty and ensuring reliable operation without sacrificing the resource utilization benefits of overlap
Solution Approach 2:
The patent applies feedback mechanisms through explicit UE behavior specifications that provide clear guidance on how to interpret and respond to search space overlap conditions. By establishing predetermined feedback rules for overlap scenarios, the system ensures that UEs and networks have consistent expectations, maintaining reliability while allowing resource-efficient overlap configurations
Data Source
AI summary
Methods and apparatuses for preconfigured uplink resource are disclosed. A method at a remote unit comprises transmitting a data in a predefined resource based on a resource configuration; and receiving a control signal in a first search space, wherein the control signal includes at least one of (1) a response to the data; (2) an updated TA; (3) an updated power; (4) an updated data transmission repetition; (5) a flag of retransmission based on dynamic grant or the predefined resource; (6) a fallback indication; and (7) a predefined resource release indication.