Multi-TRP Beam Updating via TRP-Specific MAC-CE Indicators
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Solution Overview
Problem
Conventional wireless communication systems are limited in managing beam updating for multiple transmission reception points (TRPs), as existing techniques primarily focus on single TRP configurations, which are inadequate for multi-TRP scenarios, leading to inefficiencies in beam management and communication reliability.
Innovation Solution
The described techniques enable a user equipment (UE) to receive control signals from multiple TRPs within a cluster, allowing for the configuration and updating of beams by receiving medium access control elements (MAC-CEs) that include transmission control indicator (TCI) states, with acknowledgments sent to each TRP to manage beam updates efficiently across the TRP cluster.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional beam updating techniques are used for single TRP configurations, then the system maintains simplicity in beam management, but the communication reliability deteriorates in multi-TRP scenarios where some TRPs may be blocked or fail
Solution Approach 1:
The patent segments the beam management process by introducing TRP-specific indicators (such as TRP ID or CORESET ID) that allow the UE to identify and manage beams for each individual TRP separately. This segmentation enables independent beam updating for each TRP, improving reliability when some TRPs fail while maintaining manageable complexity through structured identification.
Solution Approach 2:
The patent implements feedback mechanisms where the UE sends acknowledgments to the network about received beam updating information for specific TRPs. This feedback loop allows the network to track which TRPs have successful beam updates and adjust transmissions accordingly, enhancing communication reliability in multi-TRP environments.
2Reliability
If beam updating is implemented for multiple TRPs with individual acknowledgments, then the communication reliability improves, but the signaling overhead and processing complexity increase
Solution Approach 1:
The patent merges multiple beam updating indications into a single MAC-CE message that can contain TRP-specific beam updates for multiple TRPs simultaneously. By combining multiple updates in one message and using TRP identifiers to distinguish them, the system reduces signaling overhead compared to sending separate messages for each TRP while maintaining reliable beam updating for each individual TRP.
3Adaptability or versatility
If the UE monitors beam updates from multiple TRPs simultaneously, then the adaptability of the system improves, but the processing complexity and power consumption increase
Solution Approach 1:
The patent applies local quality by enabling the UE to process beam updating information selectively for specific TRPs based on local conditions. The UE can identify which TRPs are currently blocked or failing using TRP-specific indicators and focus processing resources only on active TRPs, reducing overall power consumption while maintaining adaptability to changing multi-TRP conditions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Aspects include configuring a user equipment (UE) to receive control signals from a first transmission reception point (TRP) and a second TRP. A first TRP may transmit a control signal to the UE indicating resources for receiving a medium access control element (MAC-CE), where the control signal includes an indication that associates the MAC-CE with the first TRP. The first TRP may transmit the MAC-CE to the UE which may include a beam update indication for the first TRP. The UE may transmit an acknowledgement to the first TRP based on receiving the MAC-CE. The UE may also transmit an acknowledgment to the second TRP indicating that it has received a beam update indication from the first TRP. In some cases, the first TRP may send a MAC-CE signal to the UE including beam update information for the second TRP.