Grant-Free Uplink Resource Allocation for M2M Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems lack a mechanism for efficiently allocating grant-free transmission resources in next-generation mobile communications, particularly for machine-to-machine (M2M) services requiring ultra-reliable and low-latency transmissions, leading to inefficiencies in data transmission.
Innovation Solution
A method where a terminal device requests and receives resource indication information for grant-free transmission resources from a network device, allowing for contention-based uplink data transmission by selecting appropriate transmission resources based on transmission characteristics such as latency, power consumption, or transmission time interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If grant-free transmission is implemented for M2M services, then data transmission efficiency is improved and latency is reduced, but there is no mechanism for network devices to obtain permission to use grant-free transmission resources
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple random access preamble sequence groups in the network device, where each group corresponds to different transmission characteristics (e.g., latency requirements, power consumption). Terminal devices can directly select from these pre-defined groups without requiring complex real-time negotiation, thus achieving efficient grant-free transmission while maintaining manageable system complexity.
2Quantity of substance
If multiple M2M devices perform contention-based uplink transmission, then network capacity is increased, but collision between devices requesting resources occurs
Solution Approach 1:
The patent segments the random access preamble sequences into multiple distinct groups, where each group is associated with specific transmission characteristics (e.g., low-latency services, power-efficient services). By dividing the preamble space into specialized groups, the patent reduces random collisions between devices with different requirements and enables more reliable contention-based access for multiple M2M devices.
3Ease of operation
If random access preamble sequences are used for network access, then devices can obtain uplink time synchronization, but the procedure is time-consuming and reduces transmission speed
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple random access preamble sequence groups in the network device, where each group corresponds to different transmission characteristics (e.g., latency requirements, power consumption). Terminal devices can directly select from these pre-defined groups without requiring complex real-time negotiation, thus achieving efficient grant-free transmission while maintaining manageable system complexity.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention discloses an uplink data transmission method, a terminal device, and a network device. The method includes: sending, by a terminal device to a network device, information used to request a grant-free transmission resource; receiving, by the terminal device, resource indication information sent by the network device, where the resource indication information is used to indicate a grant-free transmission resource that is allocated by the network device to the terminal device according to the information used to request the grant-free transmission resource; and determining, by the terminal device according to the resource indication information, the transmission resource used for performing grant-free transmission. According to the uplink data transmission method, the terminal device, and the network device in embodiments of the present invention, contention-based uplink data transmission can be implemented, and data transmission efficiency of a system can be improved.