Beam Management for Overlapping Downlink Reception
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Solution Overview
Problem
Wireless devices face challenges in determining whether to receive and decode overlapping transmissions from base stations, leading to potential drops in communication due to insufficient processing capabilities, and they also experience delays in resource switching during wireless communications.
Innovation Solution
The implementation of CORESET group indexes allows wireless devices to determine whether to receive and decode overlapping transmissions based on specific indications, and the application of rules to select appropriate resources during resource switching, enhancing synchronization between base stations and wireless devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless device receives and decodes overlapping transmissions without using CORESET group indexes, then the device may successfully receive transmissions from different TRPs, but the device may drop transmissions when processing capabilities are insufficient
Solution Approach 1:
The patent segments transmissions by assigning different CORESET group indexes to transmissions from different TRPs. This allows the wireless device to separately identify and process overlapping transmissions from different sources, reducing processing complexity while maintaining reliable reception of transmissions within each group
Solution Approach 2:
The CORESET group index acts as an intermediary parameter that enables the wireless device to determine whether to receive or drop overlapping transmissions. This intermediary mechanism provides a simple decision rule based on comparing CORESET group indexes, avoiding complex processing capability assessments
2Reliability
If a wireless device waits for MAC CE indication during resource switching, then the device can synchronize resource usage with the base station, but the device experiences delay in using new resources
Solution Approach 1:
The patent applies preliminary action by having the wireless device select a resource (TCI state, beam, etc.) from previously active BWP TCI states before the resource switching is complete. This allows the device to proactively prepare and use the new resource immediately, eliminating the waiting delay while maintaining synchronization through the selection rule
3Loss of time
If a wireless device uses an incorrect resource during resource switching, then the device may avoid delay, but the device cannot properly monitor coresets for messages from the base station
Solution Approach 1:
The patent implements feedback through a selection rule that guides the wireless device to choose resources from previously active BWP TCI states. This feedback mechanism ensures the device selects a resource that is likely to be correct and synchronized with base station expectations, maintaining message reception reliability while enabling immediate resource usage
Data Source
AI summary
Wireless communications may comprise communications between a base station and a wireless device. The base station may send and/or schedule one or more transmissions to the wireless device that may overlap in time. The wireless device may receive and/or decode overlapping transmissions that are associated with a different indication and/or the wireless device may not receive at least one of overlapping transmissions that are associated with the same indications.