DCI Response Coordination for Redundant PDCCH Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring reliable transmission of downlink control channels due to potential blocking of individual DCIs, leading to redundant response signaling and resource waste.
Innovation Solution
Implementing a coordination mechanism for downlink channel information (DCI) signaling by using predetermined content to synchronize timing offsets and similarity conditions among multiple DCIs, allowing coordinated scheduling and omission of redundant responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple DCIs are transmitted to ensure reliable downlink control channel delivery, then PDCCH reliability is improved, but redundant response signaling occurs causing resource waste
Solution Approach 1:
The patent merges multiple redundant response signaling into a single coordinated response by introducing a response coordination mechanism. When multiple DCIs trigger the same response type, the UE coordinates these responses to be transmitted together in one uplink resource, eliminating redundant transmissions while maintaining reliability.
Solution Approach 2:
The response coordination mechanism serves multiple functions simultaneously: it coordinates responses from multiple DCIs, determines timing offsets, selects appropriate uplink resources, and prevents redundant signaling all through a unified approach that improves overall system efficiency.
2Reliability
If multiple DCIs are transmitted to ensure reliable downlink control channel delivery, then PDCCH reliability is improved, but time-domain resource waste increases
Solution Approach 1:
The patent merges multiple time-separated response signaling opportunities into a single coordinated transmission time. By calculating timing offsets and coordinating responses, multiple DCI-triggered responses are consolidated into one uplink transmission, eliminating time-domain waste.
3Reliability
If multiple DCIs are transmitted to ensure reliable downlink control channel delivery, then PDCCH reliability is improved, but frequency-domain resource waste increases
Solution Approach 1:
The patent merges multiple frequency-resource-consuming response transmissions into a single uplink resource allocation. By coordinating responses and selecting one uplink resource for consolidated transmission, frequency-domain resources are efficiently utilized without redundancy.
4Reliability
If redundant response signaling is transmitted for each DCI, then response reliability is maintained, but network resource utilization efficiency decreases
Solution Approach 1:
The patent merges multiple redundant response signaling transmissions into a single coordinated response. This maintains response reliability (the response is still sent) while dramatically improving network resource utilization by eliminating duplicate transmissions across time and frequency resources.
Solution Approach 2:
The response coordination mechanism implements feedback by monitoring multiple DCI receptions and adjusting the response transmission strategy accordingly. The UE determines whether to coordinate responses based on the specific DCIs received, optimizing resource usage while ensuring reliability.
Data Source
AI summary
User equipment (UE) may communicate with a basestation (e.g., a gNodeB) via multiple transmit-receive points. The basestation may send multiple redundant or partially redundant DCIs (downlink channel information). The redundant DCIs may trigger redundant signaling responses. The UE may access predetermined content within the DCI to determine coordination of responses such that signaling response redundancy is avoided.