Merging Concurrent Random Access Procedures in Wireless UEs
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in handling multiple concurrent Random Access (RA) procedures, leading to resource wastage and increased latency due to the inability to effectively combine and utilize time-frequency resources across overlapping RA processes.
Innovation Solution
The proposed solution involves combining multiple RA procedures into a single procedure, allowing for the transmission of combined RA messages and utilizing the ramped power of the initial procedure, and indicating pending grants for other procedures, thereby optimizing resource utilization and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a second RA procedure is triggered during an ongoing first RA procedure, then the newly triggered RA procedure can be started, but the time-frequency resources of the stopped first RA procedure go unutilized and must be re-initiated later, reducing RA resource utilization
Solution Approach 1:
The patent merges multiple RA procedures into a single combined RA procedure when they overlap in time. When a second RA procedure is triggered during an ongoing first RA procedure, instead of stopping the first procedure and losing its resources, the patent combines both procedures into one unified RA procedure that utilizes the time-frequency resources of the first procedure while handling both RA requests, thereby improving resource utilization and reducing latency
2Ease of operation
If the UE stops the ongoing first RA procedure to start the newly triggered second RA procedure, then the new procedure can be executed, but the grant in Message 2 of the stopped procedure is wasted and time-frequency resources are lost
Solution Approach 1:
The patent combines the ongoing first RA procedure and the newly triggered second RA procedure into a single unified RA procedure. This allows the UE to retain and utilize the grant received in Message 2 of the first procedure for the combined procedure, avoiding waste of grant resources and time-frequency resources while still handling both RA requests effectively
3Productivity
If the UE stops transmitting preambles and monitoring for RAR messages when a new RA procedure is triggered, then the new procedure can begin, but this causes unnecessary retransmissions and increases latency
Solution Approach 1:
The patent maintains continuous preamble transmission and RAR message monitoring by combining multiple RA procedures into one unified procedure. Instead of stopping transmissions when a new procedure is triggered, the combined procedure allows the UE to continue transmitting preambles and monitoring for RAR messages without interruption, thereby avoiding unnecessary retransmissions and reducing latency
Data Source
AI summary
The present disclosure presents example techniques for merging multiple concurrent RA procedures. For instance, the present disclosure describes an example method performed by a user equipment, UE (102), for performing random access to connect to a wireless access network. In an aspect the method includes determining that a second RA procedure (122) is triggered during a first RA procedure (120) that is ongoing. In a further aspect, the example includes combining the second RA procedure (122) and the first RA procedure (120). Corresponding UE, computer program, and processor/memory embodiments are also described.