Dynamic Random Access Mode Selection in Wireless Networks
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Solution Overview
Problem
Existing wireless communication systems lack a flexible random access method for terminal devices to adjust their access mode based on real-time network conditions, leading to inefficiencies and delays in communication.
Innovation Solution
A method where a network device sends indication information to a terminal device through physical layer control information or a MAC control element, allowing the terminal device to adjust its random access mode dynamically based on network status and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a terminal device uses a fixed random access procedure (4-step or 2-step), then the device can establish uplink synchronization, but the access delay increases and communication efficiency decreases when network conditions change
Solution Approach 1:
The patent implements dynamic random access mode selection by introducing a indicator field in the random access response message that dynamically indicates whether to use 2-step or 4-step random access procedure. The network device can flexibly adjust the random access mode based on real-time network conditions, terminal device capabilities, and service requirements, transforming the static fixed-mode approach into a dynamic adaptive system that reduces access delay while maintaining compatibility with existing protocols
Solution Approach 2:
The patent changes the parameter of random access procedure type by introducing a configurable indicator in the random access response. This parameter change mechanism allows the system to switch between different random access modes (2-step or 4-step) based on network conditions, terminal capabilities, and service requirements, thereby optimizing access delay and communication efficiency without requiring fundamental protocol changes
2Loss of time
If the network device always uses 2-step random access procedure, then access delay is reduced, but network congestion increases and interference between devices worsens
Solution Approach 1:
The patent implements dynamic random access mode selection by introducing a indicator field in the random access response message that dynamically indicates whether to use 2-step or 4-step random access procedure. The network device can flexibly adjust the random access mode based on real-time network conditions, terminal device capabilities, and service requirements, transforming the static fixed-mode approach into a dynamic adaptive system that reduces access delay while maintaining compatibility with existing protocols
Solution Approach 2:
The network device uses feedback mechanisms to monitor network congestion and interference levels, then adjusts the random access mode indication accordingly. When congestion is detected, the network can indicate terminals to use 4-step procedure; when conditions are favorable, 2-step procedure is indicated, creating a closed-loop control system that mitigates harmful effects while maintaining low latency
3Productivity
If the terminal device sends only a preamble in Msg1, then the random access procedure follows traditional 4-step process, but communication efficiency decreases due to additional signaling steps
Solution Approach 1:
The patent merges the random access preamble transmission with uplink data transmission by allowing the terminal to send both in a single Msg1 using PUSCH, rather than separate transmissions. This combining of functions reduces the number of signaling steps from 4 to 2, improving communication efficiency while the network device manages the increased complexity through intelligent resource allocation and mode indication
4Productivity
If the network device provides flexible random access mode indication, then communication efficiency improves, but the complexity of the random access protocol increases
Solution Approach 1:
The patent segments the protocol enhancement into a dedicated indicator field within the existing random access response message structure, rather than redesigning the entire protocol. This segmented approach adds flexibility and improves communication efficiency while minimizing protocol complexity by reusing existing message frameworks and adding only necessary new elements
Data Source
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AI summary
This application provides a random access method and a communications apparatus. The method includes: A first wireless device sends, to a second wireless device, indication information carried in physical layer control information or a media access control MAC control element, where the indication information is used to indicate a random access mode of the second wireless device. The random access mode includes four-step random access and two-step random access, or the random access mode includes a format of a to-be-sent Msgl, for example, a Msgl that carries a random access preamble and data, or a Msgl that carries a random access preamble, or a Msgl that carries data. The second wireless device sends a first message Msgl in a random access procedure to the first wireless device based on the indication information. Based on this application, a random access mode used by a terminal device can be flexibly adjusted in real time, thereby improving communication efficiency.