Method and apparatus for random access
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Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently configuring resource allocation for multiple transmissions of message A (msgA) during the random access (RA) procedure, leading to suboptimal performance in establishing connections with network nodes.
Innovation Solution
Adaptive transmission configuration for msgA in the RA procedure is enabled by varying resource allocation patterns for different transmissions, including preamble and payload on shared channels, based on specific configuration information to enhance diversity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the same resource allocation is used for all msgA transmissions, then the configuration is simple, but the RA performance is suboptimal due to lack of diversity
Solution Approach 1:
The patent applies dynamics by making the resource allocation configuration adaptive rather than static. Different resource allocation patterns are configured for different transmission attempts (e.g., first transmission vs. second transmission), allowing the system to dynamically adjust resources based on transmission history and improve RA performance through diversity while maintaining manageable complexity through pattern-based configuration.
2Adaptability or versatility
If different resource allocation patterns are configured for different msgA transmissions, then transmission diversity is increased, but the configuration complexity increases
Solution Approach 1:
The patent implements periodic action by configuring resource allocation patterns that repeat in a predictable sequence across transmission attempts. For example, first transmissions use one pattern while second transmissions use another pattern, creating a periodic structure that provides transmission diversity without requiring complex ad-hoc configuration decisions, thereby managing complexity through regularity.
Solution Approach 2:
The patent applies parameter changes by modifying specific resource allocation parameters (such as time-frequency resources, preamble formats, or power levels) between different transmission attempts. This allows the system to achieve adaptability and transmission diversity by changing key parameters based on transmission attempt number or other conditions, while maintaining overall configuration manageability through controlled parameter variation.
3Reliability
If resource allocation is optimized for each transmission attempt, then RA success rate improves, but signaling overhead increases
Solution Approach 1:
The patent applies copying by using template-based or pattern-based resource allocation configurations that can be replicated across different transmission attempts. Instead of individually optimizing each transmission with unique configurations, the system uses copyable patterns that provide optimized resource allocation for different transmission scenarios while minimizing signaling overhead through reuse of standardized configuration templates.
Data Source
AI summary
Various embodiments of the present disclosure provide a method for random access. The method which may be performed by a terminal device comprises performing a first transmission of a message from the terminal device to a network node in a random access procedure, according to first configuration information. The first transmission of the message comprises a transmission of a first preamble and a transmission of a payload on a shared channel. The method further comprises performing a second transmission of the message from the terminal device to the network node in the random access procedure, according to second configuration information. The second transmission of the message comprises at least one of: a transmission of a second preamble and a retransmission of the payload on the shared channel.