Telecommunications Terminal Random Access Procedure Switching
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Solution Overview
Problem
Current wireless telecommunications systems face challenges in efficiently transmitting uplink data in inactive states without transitioning to a connected state, particularly due to congestion and preamble collisions, which can lead to unreliable data transmission and increased resource allocation issues.
Innovation Solution
A method is introduced where a terminal can automatically switch from a two-step random access procedure to a four-step procedure upon detecting congestion or preamble collisions, using different preamble groups to reduce the risk of data transmission failure and enhance reliability by ensuring uplink data is sent only after successful resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a two-step random access procedure is used for uplink data transmission in inactive state, then transmission speed is improved, but reliability deteriorates due to congestion and preamble collisions
Solution Approach 1:
The terminal dynamically switches between two-step and four-step random access procedures based on detected network conditions. When congestion or preamble collisions are detected in the two-step procedure, the terminal transitions to the four-step procedure, making the system adaptive to changing network states rather than fixed in one mode.
Solution Approach 2:
The invention changes the procedural parameter of random access by switching between different procedure types (two-step vs. four-step). This parameter change allows the system to adapt to network conditions, selecting the appropriate procedure complexity based on current congestion levels and collision risks.
2Device complexity
If a two-step random access procedure is used, then resource allocation overhead is reduced, but transmission reliability deteriorates under high network load
Solution Approach 1:
The terminal dynamically adjusts the random access procedure complexity based on network conditions. Under low load, the simplified two-step procedure reduces overhead. Under high load, the system transitions to the more robust four-step procedure, making resource allocation adaptive rather than static.
Solution Approach 2:
The terminal monitors network conditions (congestion, preamble collisions) and uses this feedback to determine which random access procedure to employ. This feedback mechanism ensures that the system responds to actual network state, switching from two-step to four-step when reliability issues are detected.
3Reliability
If automatic switching between procedures is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The terminal autonomously monitors its own transmission conditions and automatically switches between random access procedures without requiring complex network control. The device serves itself by detecting congestion and collisions, then independently deciding to switch procedures, reducing the need for external complexity.
Data Source
AI summary
A method of transmitting data in a telecommunications system comprising a terminal transmitting a first random access request message to the base station in accordance with the first random access procedure for transmitting the data to the base station, the first random access request message comprising at least part of the data and a first preamble; and upon determination that the use of the first random access procedure has been unsuccessful, the terminal transmitting a second random access request message to the base station in accordance with the second random access procedure for transmitting the data to the base station, the second random access request message comprising a second preamble.