Uplink Data Transmission in Inactive State via RACH
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Solution Overview
Problem
In telecommunications, terminal devices in an inactive state face inefficiencies in small data transmission due to unnecessary power consumption and signaling overhead, as they require frequent connection setups and releases for small and infrequent data packets, especially with the 3GPP Release 16 limitations, which are addressed by introducing a random access channel (RACH) based solution in 3GPP NR Release 17.
Innovation Solution
The method involves determining configuration parameters for uplink data transmission in an inactive state, selecting a target random access procedure (either 2-step or 4-step) based on packet size and resource availability, and transmitting data using dedicated random access resources to minimize power consumption and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If connection setup is performed for each small data transmission in inactive state, then data transmission can be achieved, but power consumption increases and signaling overhead increases
Solution Approach 1:
The terminal device performs preliminary determination of configuration parameters and selects the target random access procedure before actual data transmission. This preliminary preparation enables the device to quickly transmit small data packets using pre-configured resources without establishing full connections, thereby reducing power consumption while maintaining transmission capability
Solution Approach 2:
The patent extracts the essential data transmission function from the complete connection setup procedure. By using random access procedures specifically for small data transmissions, the system separates this lightweight operation from full connection establishment, eliminating unnecessary signaling overhead and reducing power consumption while preserving data transmission capability
2Productivity
If connection setup is performed for each small data transmission in inactive state, then data transmission can be achieved, but signaling overhead increases
Solution Approach 1:
The patent extracts the essential data transmission function from the complete connection setup procedure. By using random access procedures specifically for small data transmissions, the system separates this lightweight operation from full connection establishment, eliminating unnecessary signaling overhead while preserving data transmission capability
Solution Approach 2:
Configuration parameters are determined preliminarily before data transmission, including selection of target random access procedure. This advance preparation reduces the need for extensive signaling during actual transmission, as the device already has the necessary configuration information ready
3Productivity
If dedicated random access resources are used for small data transmission, then resource usage is optimized, but device complexity increases
Solution Approach 1:
The patent employs parameter changes by determining configuration parameters dynamically based on transmission needs. The terminal device selects appropriate random access procedures (2-step or 4-step) and configures resources according to specific transmission scenarios, optimizing resource efficiency while managing complexity through adaptive parameter selection rather than fixed complex configurations
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media of communication. A method of communication implemented by a terminal device comprises in accordance with a determination that uplink data is to be transmitted in an inactive state, determining configuration parameters for transmission of the uplink data; determining, based on the configuration parameters, a target random access procedure for transmission of the uplink data in an inactive state of the terminal device; and transmitting, based on the target random access procedure, the uplink data to a network device in the inactive state. A method of communication implemented by a network device comprises receiving uplink data transmitted by a terminal device in an inactive state based on a target random access procedure, the target random access procedure being determined based on configuration parameters, the configuration parameters being determined upon determination that uplink data is to be transmitted in the inactive state; and transmitting, to the terminal device, a response to the reception of the uplink data. In this way, control scheme for small data transmission based on RACH is provided.