Adaptive Random Access Repetition for Low-Capability Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing the initial random access procedure, particularly for low-capability terminal devices with limited antenna, bandwidth, or data channel capabilities, leading to reduced coverage performance, increased delay, and power consumption due to the lack of channel repetition timing mechanisms.
Innovation Solution
Adaptive determination of transmission parameters for random access procedures based on the type and capability of the terminal device, including flexible slot structures and channel repetition timing, to enhance coverage and success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If signals are transmitted only once without channel repetition timing mechanism, then device complexity is reduced, but reliability of initial random access deteriorates
Solution Approach 1:
The patent introduces channel repetition timing mechanisms that transmit random access signals periodically multiple times instead of once. This periodic transmission improves reliability by providing multiple opportunities for successful access while maintaining manageable device complexity through structured repetition patterns.
Solution Approach 2:
The patent configures channel repetition timing parameters in advance through RRC signaling before the actual random access occurs. This preliminary configuration allows the device to prepare for reliable access without adding complex real-time decision-making, resolving the contradiction between reliability and complexity.
2Area of stationary object
If adaptive transmission parameters are configured for low-capability devices, then coverage performance is improved, but device complexity increases
Solution Approach 1:
The patent applies different transmission parameters specifically tailored for low-capability terminal devices versus other devices. By providing specialized coverage enhancement parameters (such as repetition counts and timing configurations) only to devices that need them, the system improves coverage for vulnerable devices without unnecessarily complicating the overall system.
Solution Approach 2:
The network automatically determines and configures appropriate transmission parameters based on device capability information. This self-service approach allows low-capability devices to receive optimized parameters without requiring complex manual configuration or device-side decision-making, improving coverage while managing system complexity.
3Reliability
If channel repetition timing mechanism is introduced, then initial random access success rate is improved, but delay increases
Solution Approach 1:
The patent implements dynamic channel repetition timing where the number of repetitions and timing intervals can be adjusted based on actual access conditions and device capabilities. This dynamic approach allows the system to achieve reliable access when needed while minimizing delay in conditions where fewer repetitions suffice, resolving the contradiction between success rate and delay.
Solution Approach 2:
The patent changes transmission parameters including repetition count, timing offset, and slot configuration to optimize the balance between success rate and delay. By adjusting these parameters adaptively, the system can achieve high reliability without excessive delay, as the parameters are tuned to match actual channel conditions and device requirements.
4Area of stationary object
If channel repetition timing mechanism is implemented, then coverage performance is improved, but power consumption increases
Solution Approach 1:
The patent applies channel repetition selectively rather than universally - using full repetition mechanisms only when coverage enhancement is actually needed for low-capability devices or in poor channel conditions. This partial application approach improves coverage for vulnerable devices while avoiding unnecessary power consumption for devices that can access successfully with standard transmission.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Disclosed is a random access method, comprising: a communication device determining a transmission parameter of a random access procedure according to the type of a terminal device and/or indication information sent by a network device. Further provided are a communication device and a storage medium.