Inactive-State Data Transmission Using Preconfigured Radio Resources
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Solution Overview
Problem
In inactive states, terminal devices experience unnecessary power consumption and signaling overhead due to frequent connection setups for small and infrequent data transmissions, which are not supported by previous 3GPP releases.
Innovation Solution
Implementing a method for data transmission in inactive states using pre-configured resource configurations, allowing uplink and downlink data transmission without full connection setup, and incorporating radio link monitoring and failure detection to manage data transmission efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection setup is performed for each data transmission in inactive state, then data transmission reliability is improved, but power consumption and signaling overhead increase
Solution Approach 1:
The network device pre-configures uplink resources (PUSCH) and downlink resources for the terminal device before it enters the inactive state. This preliminary configuration allows the terminal to perform small data transmissions without establishing a full connection, thereby reducing power consumption while maintaining transmission reliability through pre-arranged resource allocation.
2Reliability
If connection setup is performed for each data transmission in inactive state, then data transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The network device provides pre-configured resource allocations including PUSCH resources, PDSCH resources, and SSB indices before the terminal enters inactive state. This preliminary action eliminates the need for repeated connection setup signaling for each small data transmission, significantly reducing signaling overhead while maintaining transmission reliability through pre-allocated resources.
3Reliability
If full connection setup is performed for data transmission, then data transmission capability is improved, but transmission speed decreases due to setup time
Solution Approach 1:
The network device pre-configures uplink PUSCH resources and downlink PDSCH resources before the terminal enters inactive state. This allows immediate data transmission without connection setup delay, improving transmission speed while maintaining capability through pre-allocated resource blocks and modulation schemes.
Solution Approach 2:
The patent segments the communication resources into pre-configured uplink resources (PUSCH), downlink resources (PDSCH), and reference signals (SSB). This segmentation allows the terminal to use only the necessary pre-configured resources for small data transmissions, avoiding the overhead of full connection setup while maintaining transmission capability.
4Reliability
If connection is maintained for data transmission, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The network device provides pre-configured resources including PUSCH, PDSCH, and SSB indices before the terminal enters inactive state. The terminal can then perform small data transmissions using these pre-configured resources without maintaining a full connection, achieving a balance between transmission capability and power consumption by avoiding continuous connection maintenance.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communications. A method for communications implemented by a terminal device comprises in response to receiving, at a terminal device from a network device, a message indicating that the terminal device is to enter an inactive state, entering the inactive state. The message comprises a resource configuration for data transmission between the terminal device and the network device. The method further comprises performing the data transmission based on the resource configuration.