Connected Mode Random Access Using Shared TDD and SBFD Resources
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Solution Overview
Problem
In wireless communications systems, user equipment (UE) operating in radio resource control (RRC) connected mode lacks a clear procedure for selecting random access resources from a common random access configuration that includes both time domain duplex (TDD) and subband full duplex (SBFD) resources when not configured with a dedicated random access configuration, leading to resource ambiguity and inefficiency.
Innovation Solution
The UE derives random access resources from a common random access configuration associated with TDD and SBFD uplink resources based on the occurrence of a trigger event during RRC connected mode, selecting from either TDD, SBFD, or both resources based on the absence of a dedicated random access configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common random access configuration includes both TDD and SBFD resources, then resource utilization is improved, but resource selection ambiguity increases
Solution Approach 1:
The patent implements dynamic resource selection by introducing a first indicator that dynamically points to either TDD or SBFD resources based on current system conditions. This allows the random access configuration to adapt between different resource types without requiring static dedication, resolving the ambiguity while maintaining flexibility and resource utilization efficiency.
Solution Approach 2:
The patent introduces a first indicator as an intermediary element that mediates between the common random access configuration and the actual resource selection. This indicator acts as a pointer or reference that resolves the ambiguity by clearly indicating which specific resources (TDD or SBFD) should be used, while still allowing both resource types to be available in the configuration.
2Device complexity
If dedicated random access configuration is not provided, then configuration overhead is reduced, but resource determination ambiguity increases
Solution Approach 1:
The patent makes the common random access configuration universal by designing it to support both TDD and SBFD resources within a single configuration structure. This eliminates the need for separate dedicated configurations for different resource types, reducing configuration overhead and complexity while maintaining clear resource selection through the first indicator mechanism.
3Quantity of substance
If both TDD and SBFD resources are utilized, then resource availability is improved, but procedure complexity increases
Solution Approach 1:
The patent segments the resource selection process into two distinct parts: the common random access configuration that defines both TDD and SBFD resources, and the first indicator that points to the specific resources to be used. This segmentation allows the system to maintain multiple resource types without increasing overall complexity, as the indicator simplifies the selection process.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Techniques described herein provide for connected mode random access procedures with common random access configuration. In some examples, a user equipment may receive receiving a common random access configuration. The common random access configuration may be associated with one or more time domain duplex (TDD) uplink resources for random access and one or more subband full duplex (SBFD) uplink resources for random access. The UE may participate in a random access procedure based on occurrence of a trigger event during a connected mode of the UE. The random access procedure may be performed on a random access resource associated with the common random access configuration. The random access resource may be determined from the TDD uplink resources, from the SBFD uplink resources, or from both the TDD uplink resources and the SBFD uplink resources.