Dynamic TCI State Signaling for Single and Multi TRP Switching
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically switching between single Transmission/Reception Point (TRP) and multi TRP operations, leading to large delays and the risk of RRC signaling storms due to high mobility and varying traffic loads, which necessitate efficient beam indication and network scheduling.
Innovation Solution
The implementation of signaling methods that dynamically switch Transmission Configuration Indicator (TCI) states between single TRP and multi TRP operations by using flags, TCI fields, and bitmaps in Downlink Control Information (DCI) to indicate single or multi TRP operations, allowing for unified TCI frameworks to reduce signaling overhead and facilitate flexible network scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RRC reconfiguration is used to switch between single TRP and multi TRP operations, then configuration flexibility is improved, but signaling delay increases and RRC signaling storms occur
Solution Approach 1:
The patent applies dynamics by enabling flexible switching between single TRP and multi TRP operations based on real-time channel conditions and traffic loads. The system dynamically reconfigures TRP operation modes through MAC-CE signaling rather than static RRC configuration, allowing adaptive response to changing network conditions without prolonged signaling delays
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple TRP operation modes and TCI states through RRC, then using MAC-CE signaling to quickly activate predefined configurations when switching is needed. This avoids the need for lengthy RRC reconfiguration during dynamic switching scenarios, reducing signaling delay while maintaining flexibility
2Adaptability or versatility
If multiple TCI states are configured for multi TRP operation, then network flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent applies universality by designing a unified TCI state framework that serves both single TRP and multi TRP operations. The same TCI state configuration mechanism handles both modes, eliminating the need for separate configuration sets and reducing overall signaling overhead while maintaining network flexibility for various TRP scenarios
Solution Approach 2:
The patent merges single TRP and multi TRP configuration mechanisms into a unified framework. By combining TCI state management and TRP operation control into a single coherent system, the patent reduces redundancy and signaling overhead while preserving the ability to support both single and multi TRP operations flexibly
3Reliability
If dynamic TRP switching is implemented, then connection quality is improved, but system complexity increases
Solution Approach 1:
The patent introduces MAC-CE signaling as an intermediary mechanism between RRC configuration and TRP operation control. This intermediary layer simplifies the system by providing a straightforward switching mechanism that doesn't require complex RRC reconfiguration procedures, thereby improving connection quality through dynamic switching while keeping system complexity manageable
Data Source
AI summary
A method for performing signaling in a multi Transmission/Reception Point (TRP) wireless communication system is described. The method comprises receiving, by a second node (104), a Medium Access Control-Control Element (MAC-CE) from a first node (102). The MAC-CE comprises a code-point. The code-point maps to a Transmission Configuration Indicator (TCI) state. The second node (104) receives at least one of a flag, TCI field, TCI selection field, signaling index and an index of a bit map from a plurality of bit maps in a Downlink Control Information (DCI) from the first node (102). The TCI field comprises at least one bit to indicate the code-point of the MAC-CE. The second node (104) activates the TCI state based on the DCI. The second node (104) performs at least one of a Downlink (DL) reception and an Uplink (UL) transmission using the TCI state activated.