Beam Management Signaling for Initial Access in Wireless Systems
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Solution Overview
Problem
Current 4G wireless communication systems face challenges in meeting the demands of 5G standards, including high data rates, massive connections, spectral efficiency, improved coverage, and reduced latency, particularly in initial access and beam management.
Innovation Solution
The implementation of enhanced beam management protocols in wireless communication systems, which involve a base station and mobile device exchanging messages to identify and switch between alternative downlink transmission beams during the random access channel procedure, improving beam reliability and diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional 4G beam management protocols are used, then device compatibility is maintained, but beam reliability and transmission efficiency for 5G applications are insufficient
Solution Approach 1:
The patent implements dynamic beam switching mechanisms where the base station and mobile device can switch between alternative downlink transmission beams during the random access channel procedure. This dynamic adaptation allows the system to select the most reliable beam based on current channel conditions, thereby improving beam reliability while maintaining compatibility with existing protocols through structured message exchanges.
Solution Approach 2:
The patent establishes alternative downlink transmission beams in advance during the initial access phase. By preparing multiple beam options before actual data transmission begins, the system can quickly switch to a reliable beam if the current beam degrades, improving overall beam reliability without requiring complex real-time beam training procedures.
2Reliability
If multiple alternative beams are managed during random access procedure, then beam diversity and reliability improve, but signaling complexity increases
Solution Approach 1:
The patent reuses existing random access channel message structures to convey beam information. By making the existing signaling protocol multi-functional (carrying both traditional random access information and new beam management information), the system achieves beam diversity and reliability improvements without significantly increasing signaling protocol complexity.
Solution Approach 2:
The patent combines beam management functions with the existing random access channel procedure. By merging beam information exchange into the standard four-step random access protocol (integrating beam indication in message 1, beam confirmation in message 2, beam switching requests in message 3, and beam acknowledgment in message 4), the system achieves reliable beam management while avoiding separate complex beam signaling procedures.
3Productivity
If beam switching is implemented during transmission, then transmission efficiency improves, but processing time and latency increase
Solution Approach 1:
The patent prepares alternative beams in advance during the initial access phase so that when beam switching is needed during data transmission, the alternative beam is already ready and configured. This preliminary preparation eliminates the need for time-consuming beam training and switching procedures during actual data transmission, thereby improving transmission efficiency without significant latency penalty.
Solution Approach 2:
The patent enables rapid beam switching by using pre-configured alternative beams and streamlined signaling procedures. When beam degradation is detected, the system can quickly switch to the prepared alternative beam without undergoing lengthy beam selection and training processes, thus minimizing beam switching latency and maintaining high transmission efficiency.
Data Source
AI summary
Enhanced beam management for a wireless communication system is provided. In one example, a method comprises: receiving, from a mobile device, a message indicating first beam information for a selected first beam of beams associated with the base station device, wherein the message is a first received message of a random access channel procedure; and receiving, from the mobile device, message indicating second beam information for a selected second beam of the beams associated with the base station device, wherein the selected second beam is an alternative to the selected first beam for transmission of downlink data to the mobile device from the base station device, and wherein the second beam is indicated in the first message of a two-step random access channel procedure. Methods of signaling the second beam and/or transmission diversity approaches employing the first beam and/or the second beam are described.