Dynamic MsgA Resource Allocation for Random Access
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Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently configuring resource allocation for message A (msgA) retransmissions 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 through dynamic or non-dynamic scheduling, allowing for flexible resource allocation for both initial and retransmission of msgA, including parameters such as redundancy version, preamble identifier, time-frequency resources, and transmission power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fixed resource allocation is used for msgA retransmissions, then resource management is simple, but RA performance and connection establishment success rate deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation for msgA retransmissions by configuring multiple PUSCH occasions and allowing the terminal to select appropriate resources based on retransmission count and network conditions. This transforms the static resource allocation into a dynamic system that adapts to varying RA procedure requirements, thereby improving connection establishment success rate while maintaining manageable complexity through pre-configured resource pools.
Solution Approach 2:
The patent changes resource allocation parameters (time-frequency resources, redundancy versions, modulation and coding schemes) based on the retransmission count and network conditions. By dynamically adjusting these parameters for each retransmission attempt, the system optimizes RA performance and connection establishment success rate without requiring complex real-time resource management, as the adjustment rules are pre-defined.
2Reliability
If flexible resource allocation is implemented for msgA transmissions, then RA performance improves, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUSCH occasions and associated parameters (time-frequency resources, redundancy versions, MCS) before the RA procedure begins. The terminal device can directly select from these pre-prepared resources based on simple rules (e.g., retransmission count), avoiding complex real-time resource allocation decisions while still achieving flexible and optimized resource usage for improved RA performance.
3Reliability
If retransmission configurations are optimized, then connection establishment success rate improves, but signaling overhead increases
Solution Approach 1:
The patent makes the downlink control information (DCI) format universal by designing it to carry both initial msgA scheduling information and retransmission configurations in a unified structure. The same DCI fields (e.g., frequency domain resource allocation, time domain resource allocation, redundancy version, MCS) serve multiple purposes depending on the RA procedure stage, reducing signaling overhead while providing optimized retransmission configurations for improved connection establishment success rate.
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 transmission of a message to a network node in a random access procedure. The transmission of the message may comprise transmission of a preamble and transmission of a payload on a shared channel. The method further comprises receiving a response message from the network node. In response to the response message, the terminal device may perform a retransmission of the payload on the shared channel to the network node according to retransmission configuration.