Random Access Response Reception in 5G Networks
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Solution Overview
Problem
Current mobile communication networks, particularly those employing 5G technology, face challenges in efficiently managing random access procedures and bandwidth adaptation across diverse wireless devices and base stations, leading to suboptimal performance in terms of coverage and data transmission efficiency.
Innovation Solution
The implementation of advanced NR (New Radio) protocol stacks and flexible bandwidth management techniques, including bandwidth parts (BWPs) and carrier aggregation, to optimize random access procedures and adapt to varying traffic conditions and device capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional random access procedures are used in 5G networks, then device compatibility is maintained, but random access efficiency and coverage performance deteriorate
Solution Approach 1:
The patent changes the parameter of random access response reception by allowing reception in both first and second downlink slots instead of only the first slot. This parameter modification enables devices to receive random access responses even when timing advances are not yet applied, thereby improving both random access efficiency and coverage performance simultaneously
Solution Approach 2:
The patent introduces dynamic behavior where the user equipment can adaptively receive random access responses in multiple downlink slots based on timing advance application status. This dynamic approach allows the system to optimize performance based on real-time conditions, resolving the contradiction between efficiency and reliability
2Productivity
If bandwidth adaptation is implemented across diverse wireless devices, then data transmission efficiency improves, but device complexity and protocol management difficulty increase
Solution Approach 1:
The patent creates a universal random access response reception mechanism that works across diverse 5G devices with different capabilities. By allowing all devices to receive random access responses in both first and second downlink slots, the system provides multi-functional support that maintains simplicity while enabling efficient bandwidth adaptation for various device types
Solution Approach 2:
The patent segments the downlink reception into two distinct slots with different purposes: the first slot for initial random access response and the second slot for timing advance application. This segmentation allows devices to process information in manageable stages, reducing protocol management complexity while maintaining high data transmission efficiency
Data Source
AI summary
A base station receives from a wireless device repetitions of a random access preamble across a plurality of system frames. The base station further transmits a downlink control information (DCI). The transmitted DCI comprises a system frame number field indicating a system frame number and a radio resource assignment. The base station also transmits a random access response via the radio resource assignment. The base station further determines, in response to the system frame number indicating a last system frame, among the plurality of system frames, on which the base station receives the repetitions, that the random access response corresponds to the random access preamble of the wireless device.