UE Random Access Configuration for SBFD Occasion Identification
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Solution Overview
Problem
In wireless communication systems, UEs face challenges in determining valid random access occasions within subband full duplex (SBFD) symbols, leading to increased latency, reduced efficiency, and decreased reliability and accuracy of communications due to improper identification of random access occasions.
Innovation Solution
UEs are explicitly or implicitly indicated on how to determine valid random access occasions through UE-specific random access configurations, including default configurations and control signals, to ensure efficient and reliable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs use random access occasions in SBFD symbols, then communication efficiency is improved, but identification accuracy of valid random access occasions deteriorates
Solution Approach 1:
The network entity configures UE-specific random access configurations in advance, providing explicit or implicit indications about which random access occasions are valid in SBFD symbols. This preliminary configuration enables UEs to correctly identify valid occasions before attempting random access, resolving the identification accuracy issue while maintaining efficiency benefits
Solution Approach 2:
The patent introduces control signals and configuration messages as intermediaries between the network entity and UEs. These intermediaries carry information about valid random access occasions in SBFD symbols, enabling accurate identification without requiring UEs to independently determine validity, thus maintaining both efficiency and accuracy
2Device complexity
If UEs determine random access occasions without explicit indications, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
UEs are configured with default random access configurations that enable them to autonomously determine valid random access occasions in SBFD symbols using pre-defined rules and parameters. This self-service approach allows UEs to operate reliably without requiring complex network signaling for each random access attempt, maintaining low device complexity while improving reliability
3Ease of operation
If UEs use default random access configurations, then ease of operation is improved, but adaptability to network conditions deteriorates
Solution Approach 1:
The patent implements a dynamic configuration mechanism where UEs start with default random access configurations for simple operation, but can receive updated UE-specific configurations from the network entity based on current network conditions. This allows the system to adapt to changing conditions while maintaining ease of operation through the default configuration fallback
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A use equipment (UE) may receive one or more UE-specific random access configurations associated with random access-triggering events. The one or more UE-specific random access configurations may also be indicative of a set of random access occasions for random access. The UE may also obtain information that is indicative of whether the UE is to use random access occasions in subband full duplex (SBFD) symbols. Based on obtaining the information, the UE may identify that one or more random access occasions of the set of random access occasions are within a SBFD symbol. The UE may then transmit one or more random access preambles during the one or more random access occasions of the SBFD symbol or during other random access occasions of the set of random access occasions based on the obtained information.