UE Random Access Resource Selection for Handover Delay Reduction
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Solution Overview
Problem
In communication technology, the random access process in User Equipment (UE) is delayed during handover or state transition, leading to increased data transmission interruption time due to the time required to detect the beam with the best signal quality.
Innovation Solution
A method where the UE selects a random access resource with the earliest transmission time from available resources, allowing it to initiate the random access process promptly, and optionally randomly selects a resource within a predetermined time period, thereby reducing the delay in handover or state transition processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE selects a beam with the best signal quality before initiating random access, then the reliability of connection is improved, but the time delay for handover or state transition increases
Solution Approach 1:
The network side pre-configures random access resources for multiple beams in advance, so that when the UE needs to perform random access, it can directly select from the pre-configured resources corresponding to detected beams without waiting for beam quality evaluation and resource allocation, thus reducing time delay while ensuring connection reliability
Solution Approach 2:
The random access resources are segmented and associated with different beams separately. The network configures multiple sets of random access resources, each corresponding to a specific beam, allowing the UE to quickly match detected beams with corresponding resources without comprehensive resource search, thereby reducing handover time while maintaining connection quality
2Reliability
If the UE waits to detect the best beam before initiating random access, then the quality of connection is improved, but the productivity of the handover process decreases
Solution Approach 1:
The network side performs preliminary configuration of random access resources for multiple beams before the UE needs to hand over. This allows the UE to immediately use pre-configured resources upon detecting available beams, eliminating the need for real-time resource allocation and significantly improving handover speed while maintaining connection quality
Solution Approach 2:
The system dynamically allows the UE to select from multiple pre-configured random access resource sets corresponding to different beams. The UE can flexibly choose resources based on real-time beam detection results, enabling fast handover while ensuring connection quality adapts to current channel conditions
Data Source
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AI summary
A random access method, a UE, a source base station and a target base station are provided. The random access method includes: the UE selects one or more beams after receiving random access resource configurations corresponding to a plurality of beams transmitted from a network side; and the UE selects a random access resource whose transmission time is a designated transmission time from available random access resources in accordance with the random access resource configuration corresponding to the one or more beams, to transmit a random access request.