Wireless Terminal Random Access with Multiple Numerologies
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Solution Overview
Problem
The existing communication systems face challenges in efficiently supporting various services with different numerologies and enhancing the random access procedure to meet the requirements of next-generation communication systems.
Innovation Solution
A method and apparatus are provided to efficiently operate base stations and terminals by determining and utilizing beam reciprocity, allowing for efficient random access procedures and supporting multiple numerologies simultaneously, which is essential for the 5G communication system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single random access channel configuration is used for all devices in LTE system bandwidth, then device compatibility is maintained, but narrow bandwidth devices cannot efficiently access the network
Solution Approach 1:
The patent segments the random access channel configuration into multiple distinct configurations: a first RACH configuration for regular devices and a second RACH configuration for narrow bandwidth devices. This segmentation allows each device type to use an optimized configuration tailored to its bandwidth capabilities, resolving the contradiction between supporting diverse devices and maintaining configuration simplicity.
Solution Approach 2:
The patent applies local quality by providing different RACH configurations to different device types based on their specific bandwidth requirements. Regular devices receive the first RACH configuration while narrow bandwidth devices receive the second RACH configuration, allowing each local segment (device type) to operate with optimal parameters for its specific needs.
2Productivity
If beamforming is implemented for initial access in 5G system, then data transmission rate is improved, but random access procedure complexity increases
Solution Approach 1:
The patent applies preliminary action by performing beamforming operations during the initial access phase before data transmission begins. The base station transmits synchronization signals and system information using beamforming to establish initial connectivity, which then enables high-rate data transmission without requiring complex beamforming procedures during the actual data transfer phase.
Solution Approach 2:
The patent uses synchronization signals and system information blocks as intermediaries that carry beamforming-related configuration information. These intermediary signals facilitate the establishment of beamformed connections during initial access, allowing the base station and terminal to negotiate and establish optimal beamforming parameters without requiring direct complex beamforming control during data transmission.
Data Source
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AI summary
The present disclosure relates to a method performed by a terminal in a wireless communication system, the method comprising receiving, from a base station, a master information block, MIB, on a physical broadcast channel, PBCH, the MIB including information on a first subcarrier spacing. The method comprises receiving, from the base station, a system information block, SIB, based on the first subcarrier spacing, the SIB including information on a second subcarrier spacing. The method comprises transmitting, to the base station, a random access preamble based on the second subcarrier spacing. The method comprises receiving, from the base station, messages associated with a random access procedure based on the first subcarrier spacing.