5G Random Access via Terminal Bandwidth and Numerology Segmentation
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Solution Overview
Problem
The traditional LTE random access procedure is not compatible with the 5G system due to larger network-side transmission bandwidths and multiple numerologies, which prevents normal operation of user equipment (UE) in 5G systems.
Innovation Solution
A random access method where a terminal determines its transmission parameters, including operating bandwidth and numerology, to transmit a random access request, and the network-side transmission point responds using corresponding parameters, allowing the UE to perform a successful random access procedure in the 5G system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the network-side transmission point operates over a large bandwidth (e.g., 100 MHz) in the 5G system, then the transmission capacity is improved, but the terminal cannot receive messages over the full transmission bandwidth, causing random access failure
Solution Approach 1:
The patent segments the random access procedure into two parts: the terminal transmits the random access preamble over its limited operating bandwidth, and the network side transmits the random access response over the full transmission bandwidth. This segmentation allows the system to accommodate both the terminal's bandwidth limitations and the network's high-capacity requirements, resolving the contradiction between large transmission bandwidth and random access success.
2Adaptability or versatility
If multiple sets of numerologies are introduced in the 5G system to meet different terminal demands, then the adaptability is improved, but the terminal complexity increases and the terminal may not be able to operate with all numerologies
Solution Approach 1:
The patent implements a self-service mechanism where the terminal autonomously selects and determines the appropriate numerology for the random access procedure based on its own capabilities and the network configuration. The network side provides numerology indication information, and the terminal independently decides which numerology to use without requiring complex coordination or support for all possible numerologies. This reduces terminal complexity while maintaining adaptability to different service requirements.
3Reliability
If the terminal must determine the operating bandwidth and numerology in the random access procedure, then the random access can succeed in 5G systems, but the terminal reception process becomes more complex
Solution Approach 1:
The patent applies preliminary action by having the network side pre-configure and indicate the numerology and bandwidth parameters before the terminal performs the random access procedure. The network side provides numerology indication information that tells the terminal which numerology to use, and the terminal determines its operating bandwidth based on this indication. This preliminary provision of parameter information simplifies the terminal's reception process while ensuring successful random access in the 5G system.
Data Source
AI summary
Disclosed are a random access method and device for solving the problem in which random access procedures of traditional LTE systems cannot be performed properly in 5G systems. The method comprises: a terminal determining a transmission parameter to be used by said terminal for data transmission, the transmission parameter comprising an operation bandwidth and/or a baseband parameter; the terminal sending, according to the transmission parameter, a random access request; and the terminal using the transmission parameter to receive a random access response corresponding to the random access request. The invention realizes random access in a 5G system, thereby increasing the access success rate.