Random Access Contention Resolution Message Repetition on PUSCH
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently handling contention resolution messages during random access procedures, particularly in scenarios where message repetitions are required, due to inadequate resource allocation and power adaptation techniques.
Innovation Solution
The solution involves sending contention resolution messages with repetitions using independent or coupled resource configurations, dynamic or semi-static resource allocation, and power adaptation techniques, along with mechanisms to indicate UE capabilities through preamble and resource selection, to enhance message transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contention resolution messages are sent with repetitions using independent resource configurations, then message transmission reliability is improved, but resource allocation complexity increases
Solution Approach 1:
The resource allocation is segmented into multiple independent configurations, each dedicated to specific message repetitions. This allows the system to allocate resources more systematically and manage complexity through structured division rather than holistic management.
Solution Approach 2:
The patent implements dynamic resource allocation where resource configurations can be adapted based on channel conditions and message priority. The system dynamically selects between different resource sets and adjusts repetition parameters to optimize reliability while managing complexity through condition-based decision making.
2Reliability
If message repetitions are transmitted with higher power, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The system applies partial power boosting only to specific message repetitions that require higher reliability, rather than uniformly increasing power for all transmissions. The base station selectively applies power adaptation to repetitions based on channel conditions and message importance, achieving reliability improvement with minimal energy overhead.
Solution Approach 2:
The patent implements power adaptation techniques that dynamically adjust transmission power parameters based on channel quality indicators and message priority. The system changes power parameters selectively for different repetitions, optimizing the balance between transmission reliability and energy consumption through parameter optimization.
3Productivity
If independent resource configurations are used for contention resolution messages and repetitions, then transmission efficiency is improved, but configuration management complexity increases
Solution Approach 1:
The patent designs resource configuration structures that serve multiple functions simultaneously. The same resource configuration framework is used for both initial message transmission and repetitions, allowing the system to manage configurations efficiently through a unified approach that handles multiple transmission scenarios.
Solution Approach 2:
The system performs preliminary resource configuration and allocation before actual message transmission. By pre-configuring resource sets and establishing allocation rules in advance, the system reduces real-time configuration management complexity while maintaining transmission efficiency through prepared resource structures.
Data Source
AI summary
A method may include sending a contention resolution message for a random access procedure from a user equipment (UE) through a physical uplink channel in a wireless communication network, and sending a repetition of the contention resolution message from the UE through the physical uplink channel. The physical uplink channel may include a physical uplink shared channel (PUSCH). The method may further include selecting a preamble from a first preamble group corresponding to a capability of the UE to send the repetition of the contention resolution message, and sending the preamble from the UE. Selecting the preamble from the first preamble group may include selecting a preamble from a first preamble sub-group corresponding to the capability of the UE to send the repetition of the contention resolution message.