Default Beam Identification in 5G NR TCI States
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face challenges in identifying default beams during certain events, leading to suboptimal latency and data rates before common beam transmission configuration indication (TCI) states are activated.
Innovation Solution
The method involves identifying and communicating via default beams among common beam TCI states, which are either explicitly or implicitly indicated, allowing for wireless communication before the activation of common beam TCI states, thereby enhancing latency and data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If common beam TCI states are activated before beam identification, then system configuration is simplified, but latency and data rates deteriorate during the activation period
Solution Approach 1:
The patent applies preliminary action by pre-identifying default beams from the set of common beam TCI states before actual communication begins. This allows the system to have beam identification ready in advance, so that when common beam TCI states are activated, communication can immediately use the pre-identified default beams without waiting for beam selection procedures, thus reducing latency while maintaining configuration simplicity
2Ease of manufacture
If common beam TCI states are activated before beam identification, then configuration process is streamlined, but data rates deteriorate before beam activation
Solution Approach 1:
The patent applies preliminary action by pre-identifying default beams from the common beam TCI states before communication starts. This ensures that when data transmission begins, the system can immediately utilize the pre-selected default beams without undergoing complex beam selection procedures, thereby maintaining high data rates from the outset while keeping the configuration process streamlined
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for identifying default beams. A method that may be performed by a user equipment (UE) includes receiving signalling activating common beam transmission configuration indication (TCI) states, where each of the common beam TCI states indicates a plurality of beams including a plurality of downlink beams, a plurality of uplink beams, or at least one downlink beam and at least one uplink beam. The method also includes identifying one or more default beams among the common beam TCI states and communicating via the one or more default beams.