Random Access Method Using Semi-Static Resources
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Solution Overview
Problem
Contention-based random access methods, such as the 4-step random access procedure, are complex and result in high latency and power consumption for terminals in wireless communication networks.
Innovation Solution
A random access method that configures a semi-static transmission resource for small data transmission, allowing terminals to initiate random access using this resource, thereby reducing the number of steps and energy consumption by directly sending an uplink message for random access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contention-based random access (4-step) is used, then random access can be performed with network connection establishment, but the process becomes complex with large latency and high power consumption
Solution Approach 1:
The patent extracts and eliminates the complex contention resolution steps (steps 2 and 3 in 4-step random access) by using a 2-step random access method where the terminal directly sends an uplink message containing identification information without requiring intermediate contention resolution messages, thereby reducing process complexity while maintaining connection establishment reliability
Solution Approach 2:
The patent applies preliminary action by pre-configuring the terminal with identification information and uplink resources before the random access process, allowing the terminal to directly transmit the uplink message with identification information in the first step, eliminating the need for subsequent contention resolution steps
2Reliability
If contention-based random access (4-step) is used, then random access can be performed with network connection establishment, but random access latency becomes large
Solution Approach 1:
The patent removes the time-consuming contention resolution steps (steps 2 and 3) from the random access process, allowing the terminal to directly send the uplink message with identification information and receive the connection establishment response in a single exchange, thereby significantly reducing random access latency
Solution Approach 2:
The patent skips the intermediate contention resolution steps by directly transitioning from the random access message to the connection establishment message, rushing through the process in a single step rather than completing all four steps sequentially, thereby reducing overall latency
3Reliability
If contention-based random access (4-step) is used, then random access can be performed with network connection establishment, but power consumption increases
Solution Approach 1:
The patent extracts and eliminates the power-consuming contention resolution steps (steps 2 and 3) by using a simplified 2-step process where the terminal sends the uplink message and receives the connection response in a single exchange, thereby reducing the total time the terminal radio interface is active and lowering power consumption
Solution Approach 2:
The patent skips the intermediate steps that consume additional power by directly transitioning from random access message transmission to connection establishment, rushing through the process faster and reducing the cumulative power consumption associated with multiple sequential steps
Data Source
AI summary
A random access method, performed by a terminal, includes: determining a semi-static transmission resource; and sending an uplink message for a random access based on the semi-static transmission resource. A random access method, performed by a network device, includes: receiving an uplink message for a random access sent by a terminal based on a semi-static transmission resource.