Terminal Device Random Access Using Predefined Minimum Common Entry Set
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Solution Overview
Problem
In high-frequency wireless communication networks like 5G, the sparse broadcast of access information tables leads to significant random access delays for newly powered-up or newly entered terminal devices, which is not acceptable for services requiring timely connectivity.
Innovation Solution
A method is introduced where a terminal device pre-defines a Minimum Common Entry Set (MCES) of random access configurations, allowing it to perform initial access without waiting for the periodic access information table (AIT), by using a predefined set of access related information including preamble, time, frequency, and power settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the access information table (AIT) is broadcasted with long periodicity to reduce network energy consumption, then power efficiency is improved, but random access delay increases significantly
Solution Approach 1:
The patent pre-configures terminal devices with default random access parameters and a predefined set of access information tables before they enter the network. This preliminary action allows terminals to perform random access immediately upon power-up or network entry without waiting for the periodic AIT broadcast, thereby resolving the contradiction between reduced broadcast frequency (lower energy consumption) and fast access (lower delay).
Solution Approach 2:
The patent creates a simplified copy of the access information table structure that is pre-stored in terminal devices. This copy contains essential random access parameters that mirror the network's AIT format, allowing terminals to use these copied parameters for immediate access without requiring real-time communication with the network for parameter acquisition.
2Use of energy by moving object
If the access information table is broadcasted infrequently to enhance power efficiency, then energy consumption is reduced, but terminal devices experience unacceptable access delay
Solution Approach 1:
Terminal devices perform preliminary configuration by storing default access parameters and predefined AIT entries before attempting network access. This advance preparation eliminates the need for terminals to wait for periodic broadcasts, maintaining high access speed while allowing the network to reduce broadcast frequency for power efficiency.
Solution Approach 2:
The patent enables terminal devices to serve themselves with random access parameters through their pre-stored default configurations. Terminals independently select parameters from their local predefined sets without requiring real-time network interaction for parameter acquisition, thereby achieving both power efficiency (reduced network broadcast activity) and high productivity (immediate access capability).
Data Source
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AI summary
The present disclosure relates to a method used in a terminal device for performing random access to a network device, and the associated terminal device. The method comprises: obtaining access related information from a predefined Minimum Common Entry Set (MCES) stored in the terminal device; and performing random access to the network device based on the access related information.