Random Access Occasion Collision Detection for NR Beam Coverage
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Solution Overview
Problem
The random access procedure in future radio communication systems, such as NR, is not clearly defined, leading to potential degradation in communication throughput.
Innovation Solution
A terminal and base station are designed to manage random access channel transmissions by determining collisions with synchronization signal blocks and configuring appropriate occasions, using transmission configuration indications and quasi-co-location relationships to optimize beam management and improve coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple random access channel transmissions are configured to improve coverage, then coverage is improved, but resource collision with synchronization signal blocks and downlink symbols may occur
Solution Approach 1:
The patent applies preliminary action by determining in advance whether a random access channel occasion collides with synchronization signal block resources or downlink symbols before configuring the random access transmission. The terminal performs collision detection using the configured occasion information and TDD-UL-DL configuration, and only transmits when no collision is detected, thereby preventing resource conflicts while maintaining coverage improvement benefits
Solution Approach 2:
The patent applies local quality by making the random access channel transmission configuration adaptive to local resource conditions. Different random access occasions are configured with different validity states based on their specific collision status with downlink resources. This allows the system to maintain coverage enhancement through multiple transmissions while ensuring each transmission occurs in a locally appropriate time-frequency resource without collision
2Adaptability or versatility
If random access procedure is not clearly defined, then system flexibility is maintained, but communication throughput degrades
Solution Approach 1:
The patent applies parameter changes by introducing specific parameters and conditions for random access channel transmission, including occasion configuration information, TDD-UL-DL configuration, and collision detection parameters. These parameter definitions provide clear transmission rules that improve throughput while maintaining system flexibility through configurable parameters that can be adapted to different deployment scenarios
Solution Approach 2:
The patent applies dynamics by making the random access transmission configuration dynamic and adaptive. The terminal determines transmission validity based on real-time collision detection with downlink resources, and the system can dynamically adjust which occasions are valid for transmission. This dynamic approach maintains flexibility while ensuring reliable throughput by preventing failed transmissions due to resource conflicts
Data Source
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Figure 2A~2B
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AI summary
A terminal according to one aspect of the present disclosure includes: a receiving section that receives a configuration of multiple random access channel transmissions; and a control section that determines, based on the configuration, whether or not a random access channel occasion (RO) for the multiple random access channel transmissions collides with at least one resource of a symbol indicated for reception of a synchronization signal block, a symbol configured as downlink or flexible by a time division multiplexing configuration, a symbol indicated as downlink or flexible by a slot format indicator, and a valid occasion for a single random access channel transmission.