Configured Grant Communication for Unconnected-State Data Transmission
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Solution Overview
Problem
Conventional radio access technologies face challenges in achieving high transmission efficiency with Configured Grant transmission, particularly in scenarios where terminals need to transition from unconnected states to connected states for data transmission, leading to excessive signaling and inefficiencies.
Innovation Solution
A communication device that performs a predetermined connection procedure to change the radio connection state from unconnected to connected, allowing data transmission without a grant, thereby reducing signaling and enhancing transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Configured Grant transmission technology is applied to assign transmission resources in advance, then transmission efficiency is improved, but signaling overhead increases when terminals need to transition from unconnected to connected states
Solution Approach 1:
The patent applies preliminary action by pre-configuring grant resources and transmission parameters before the terminal actually needs to transmit data. The network device allocates configured grant resources and transmits configuration information in advance, so when the terminal needs to transmit, it can immediately use the pre-configured resources without undergoing full connection procedures, thus reducing signaling overhead while maintaining transmission efficiency
Solution Approach 2:
The patent segments the connection procedure by allowing terminals to transmit data in a simplified state without completing the full RRC connection. It divides the transmission process into two paths: one for terminals in connected state using dynamic grants, and another for terminals in unconnected or idle states using configured grants, thereby reducing unnecessary signaling for terminals that only need to send small amounts of data
2Reliability
If connection procedures are performed to enable data transmission, then reliable communication is established, but transmission delay increases
Solution Approach 1:
The patent performs preliminary action by pre-establishing configured grant resources and transmission parameters before actual data transmission is needed. The network device configures grant resources, transmission power, and other parameters in advance, so when the terminal needs to transmit urgent data, it can immediately use these pre-configured resources without undergoing time-consuming connection procedures, thus reducing transmission delay while maintaining communication reliability through pre-validated parameters
3Loss of information
If terminals transmit data in unconnected state using pre-configured resources, then signaling overhead is reduced, but transmission reliability may be compromised
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure and validate all transmission parameters including grant resources, transmission power, modulation schemes, and coding rates before the terminal enters unconnected state. This advance configuration ensures that even when transmitting without full connection, the terminal uses reliable, pre-validated parameters that guarantee transmission quality
Solution Approach 2:
The patent implements feedback mechanisms where the network device monitors transmissions from terminals in unconnected state using configured grants. The network can detect transmitted data, provide acknowledgments or negative acknowledgments, and retransmit if necessary, thereby maintaining transmission reliability even when terminals operate without full connection procedures
Data Source
AI summary
A communication device is a device in which a radio connection state with another communication device changes from an unconnected state to a predetermined connected state by performing a predetermined connection procedure. The communication device acquires predetermined information for transmitting data to the another communication device in the unconnected state. The communication device then transmits the data to the another communication device in the unconnected state based on the predetermined information.