RRC TCI Configuration for Lower-Layer Triggered Mobility
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing both downlink and uplink transmission configurations, as current Release 15 TCI configurations may not fully leverage advanced TCI frameworks like Unified TCI, leading to suboptimal signal quality and coverage.
Innovation Solution
A network entity evaluates UE capability and configures either Release 15 or Unified TCI based on common frameworks supported by both, enabling advanced TCI configurations when feasible, thereby enhancing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Release 15 TCI configuration is used, then device compatibility is maintained, but transmission optimization for both downlink and uplink is limited
Solution Approach 1:
The patent implements dynamic TCI framework selection where the network entity and UE adapt between Release 15 and Unified TCI frameworks based on capability exchange. The system transitions from static configuration to dynamic adaptation, allowing the TCI framework to change based on real-time capability assessment while maintaining operational simplicity through automated selection procedures.
Solution Approach 2:
The patent changes the operational parameter of TCI framework type based on capability assessment. By detecting whether the UE supports Unified TCI and adjusting the configuration parameter accordingly (Release 15 vs. Unified TCI), the system optimizes transmission configuration without increasing operational complexity for the end user.
2Reliability
If advanced Unified TCI framework is deployed, then signal quality and coverage are improved, but compatibility with legacy UEs is reduced
Solution Approach 1:
The patent segments the TCI framework into two distinct types: Release 15 TCI and Unified TCI. This segmentation allows the system to offer differentiated configurations where legacy UEs receive Release 15 TCI for reliable operation, while advanced UEs receive Unified TCI for enhanced signal quality and coverage, thereby maintaining overall system compatibility.
Solution Approach 2:
The patent creates a universal capability assessment mechanism that works across all UE types. The network entity universally applies the capability exchange procedure to determine appropriate TCI framework configuration, making the system adaptable to both legacy and advanced UEs through a single unified procedure that selects the appropriate framework type.
3Ease of manufacture
If capability assessment procedures are implemented, then appropriate TCI configuration is achieved, but signaling overhead increases
Solution Approach 1:
The patent implements a minimal capability assessment approach that only exchanges necessary information (Unified TCI support capability) rather than comprehensive capability sets. This partial action approach achieves sufficient configuration accuracy to select between two TCI framework types while minimizing signaling overhead by transmitting only the essential capability indicator.
Data Source
AI summary
A network entity receives, from a user equipment, a message indicative of a type of transmission configuration indication (TCI) framework supported by the user equipment. The network entity transmits, to the user equipment, a radio resource control (RRC) configuration message, including one of one or more TCI configurations corresponding to one of one or more types of TCI frameworks supported by the network entity and supported by the user equipment as indicated in the message received from the user equipment. The message indicative of the type of TCI framework may be a user equipment capability information message. The RRC configuration message may include a lower layer triggered mobility (LTM) candidate to add modification list information element (IE) indicative of the type of TCI framework. The LTM candidate to add modification list IE may be configured as one pair of three pairs of fields.