Random Access Repetition Scheme for Weak Coverage Uplink Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing random access technologies struggle to effectively increase the probability of a terminal successfully accessing a network device in weak coverage scenarios, particularly due to limitations in the reception of random access preambles and uplink messages.
Innovation Solution
The method involves repeatedly sending random access preambles and uplink messages, with configuration information provided by the network device to manage candidate parameters for repetitions, reducing the need for additional indication of these parameters and optimizing transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal repeatedly sends the random access preamble and uplink message, then the probability of successful network access is increased, but the transmission time and resource consumption increase
Solution Approach 1:
The patent implements periodic repetition of the random access preamble and uplink message transmission. The terminal sends the preamble and uplink message multiple times in periodic intervals, allowing the network device to accumulate sufficient signal copies for reliable detection while managing transmission time through structured periodicity rather than continuous transmission.
Solution Approach 2:
The network device provides configuration information that pre-configures the repetition parameters before the actual transmission begins. This preliminary configuration allows the terminal to know in advance how many times to repeat the transmission, enabling better time management and reducing unnecessary transmission delays.
2Adaptability or versatility
If the network device provides configuration information for multiple candidate parameters, then the adaptability to different coverage scenarios is improved, but the signaling overhead increases
Solution Approach 1:
The patent segments the parameter configuration into two parts: first configuration information that provides a set of candidate parameters, and second configuration information that selects from these candidates. This segmentation allows the system to provide adaptability through multiple candidates while reducing overhead by using a hierarchical selection process rather than transmitting all parameters at once.
Solution Approach 2:
The network device provides more candidate parameters than strictly necessary, allowing the terminal to select the appropriate parameter based on actual coverage conditions. This partial provision of excessive configuration options enables better adaptability while the terminal's selective application of parameters reduces the effective overhead compared to transmitting only the minimal necessary parameter set.
Data Source
AI summary
This application relates to the field of communication technologies, and discloses a communication method and apparatus. The method includes: A terminal repeatedly sends a random access preamble to a network device, receives a response message for the preamble from the network device, and repeatedly sends a first uplink message to the network device based on the response message, where a first parameter for repeatedly sending the first uplink message corresponds to a first number of repetitions of the preamble. According to the foregoing method, the terminal may repeatedly send the random access preamble and repeatedly send the first uplink message in a random access procedure, that is, repeatedly sending the preamble and repeatedly sending the uplink message may coexist, so that a probability that the terminal successfully accesses the network device is increased in a weak coverage scenario.