Fronthaul Random Access Preamble Detection via DU-RU Extension Signaling
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Solution Overview
Problem
The increasing transmission capacity in wireless communication systems necessitates a more efficient method for identifying random access signals in the fronthaul interface between the distributed unit (DU) and radio unit (RU) to optimize function split and reduce installation costs.
Innovation Solution
A device and method for identifying random access signals in the fronthaul interface by exchanging control plane messages with extension type information for detecting random access preambles, including indication information and maximum reporting numbers, between the DU and RU.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission capacity is increased to support more random access preambles, then detection accuracy is improved, but device complexity and installation costs increase
Solution Approach 1:
The patent segments the random access preamble detection process by introducing extension type information that divides preambles into different groups (first group with longer sequence, second group with shorter sequence). This segmentation allows the system to handle different detection scenarios separately, improving detection accuracy for each group while managing overall system complexity through structured organization.
Solution Approach 2:
The patent adds a new dimension to the detection process by introducing extension type information as an additional parameter. This dimension allows the receiving device to differentiate between multiple preamble types and apply specific detection methods for each, thereby improving detection accuracy without proportionally increasing device complexity.
2Adaptability or versatility
If more random access preambles are supported, then system capacity is improved, but transmission capacity and installation costs increase
Solution Approach 1:
The patent changes key parameters of the random access preambles by introducing extension type information that specifies different sequence lengths (longer sequence for first group, shorter sequence for second group). This parameter change allows the system to support more preambles with varied characteristics, improving system capacity while optimizing transmission capacity requirements for each group.
3Ease of manufacture
If function split is optimized between DU and RU, then installation costs are reduced, but detection complexity may increase
Solution Approach 1:
The patent introduces extension type information as an intermediary element that facilitates the function split between DU and RU. This intermediary carries essential detection parameters from the DU to the RU, enabling the RU to perform detection operations independently with reduced complexity, while the DU maintains overall control and optimization capabilities.
Data Source
AI summary
A device of a radio unit (RU) is provided. The device includes a transceiver, memory, comprising one or more storage media, storing instructions, and at least one processor comprising processing circuitry communicatively coupled to the transceiver and the memory, wherein the instructions, when executed by the at least one processor individually or collectively, cause the device to obtain, from a distributed unit (DU), a control plane message including extension type information for detection of a random access preamble, and transmit, to the DU, an uplink message including information on random access preambles, wherein the random access preambles are detected based on the extension type information, and wherein the extension type information includes indication information for detection random access preambles and information on a maximum number of reporting random access preambles.