Inactive-State Uplink Transmission for Small NR Data Packets
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Solution Overview
Problem
In the New Radio (NR) system, the RRC_INACTIVE state leads to unnecessary power consumption and signaling overhead for small data transmissions due to the need for terminal devices to resume connections, which is inefficient for UEs with low transmission frequency and small data volume.
Innovation Solution
The method allows data transmission in the inactive state using preconfigured uplink resources or random access resources, with the terminal device sending uplink information that includes uplink data and identity information when necessary to reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal device resumes connection for small data transmission in RRC_INACTIVE state, then the data transmission can be completed, but unnecessary power consumption and signaling overhead are generated
Solution Approach 1:
The network device pre-configures uplink resources for the terminal device in RRC_INACTIVE state before data transmission is needed. When small data arrives, the terminal can immediately use these pre-configured resources without resuming connection, thereby avoiding unnecessary power consumption while maintaining data transmission capability
Solution Approach 2:
The patent extracts the essential data transmission function from the full connection resumption procedure. By allowing terminals to send small data packets using only pre-configured uplink resources while remaining in RRC_INACTIVE state, it separates the data transmission capability from the complete connection establishment process, eliminating unnecessary signaling and power consumption
2Productivity
If the terminal device resumes connection for small data transmission in RRC_INACTIVE state, then the data transmission can be completed, but signaling overhead increases
Solution Approach 1:
The patent extracts only the necessary data transmission function from the full connection resumption procedure. By allowing terminals to send small data packets using pre-configured uplink resources while remaining in RRC_INACTIVE state, it separates data transmission from complete connection establishment, eliminating unnecessary signaling overhead
Solution Approach 2:
The network device performs preliminary configuration of uplink resources and terminal identifiers before data transmission. This pre-configuration allows the terminal to transmit small data without undergoing the full connection resumption signaling process, thereby reducing signaling overhead while maintaining transmission capability
Data Source
AI summary
A data transmission method and a terminal device are provided. The method includes: in response to that a terminal device selects to perform a data transmission in an inactive state based on a preconfigured uplink resource, sending, by the terminal device, uplink information to a network device. The uplink information includes at least uplink data to be sent by the terminal device, or the uplink information includes at least the uplink data to be sent by the terminal device and identity information of the terminal device.