H-RNTI Variable State Management for Wireless Packet Transmission
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Solution Overview
Problem
The existing determining procedure for stopping high speed downlink operation in the CELL_FACH state in wireless communications systems often degrades packet transmission performance by incorrectly setting variables to 'FALSE', leading to repeated RRC connections and invalid configurations when the selected cell/URA does not support HS-DSCH reception.
Innovation Solution
A method that changes the dedicated H-RNTI variable from a use state to a close state and determines the settings of both dedicated and common H-RNTI variables as valid configurations when the common variable is in a close state, preventing the setting of the INVALID_CONFIGURATION variable to 'TRUE' and maintaining RRC connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the existing determining procedure is used to stop high speed downlink operation in CELL_FACH state, then the procedure is simple to implement, but packet transmission performance degrades due to incorrect variable settings
Solution Approach 1:
The patent changes the state parameters of H-RNTI variables from binary (set/cleared) to three-state (set, close, undefined) to resolve the contradiction. When stopping HS-DSCH reception, the dedicated H-RNTI variable is changed to 'close' state instead of simply cleared, and the common H-RNTI variable is set to 'close' state, preventing invalid configuration errors while maintaining implementation simplicity.
2Speed
If the dedicated H-RNTI variable is cleared to stop HS-DSCH reception, then the high speed downlink operation is stopped, but repeated RRC connections are triggered causing transmission delays
Solution Approach 1:
The patent applies prior cushioning by pre-defining the 'close' state for H-RNTI variables before stopping HS-DSCH reception. This prevents the system from entering an invalid configuration state that would trigger repeated RRC connections, thereby cushioning against future transmission delays while maintaining high speed operation when conditions are favorable.
3Productivity
If the common H-RNTI variable is used for HS-DSCH reception, then multiple UEs can share the same channel, but UE identification overhead increases in packet headers
Solution Approach 1:
The patent segments the H-RNTI variable usage into two distinct modes: dedicated H-RNTI for individual UE high-speed reception without overhead, and common H-RNTI for shared channel access with overhead. The system can selectively switch between these segmented modes based on service requirements, allowing optimization between channel utilization and identification overhead.
Data Source
AI summary
To avoid degrading the packet transmission performance, a method for improving a determining procedure of stopping a high speed downlink operation corresponding to a CELL_FACH state for a user equipment, also called UE, in the CELL_FACH state in a wireless communications system is provided. The method includes changing a setting of a dedicated variable corresponding to a dedicated HS-DSCH radio network transaction identifier, hereinafter called H-RNTI, from a use state to a close state; and determining that the setting of the dedicated variable and a setting of a common variable corresponding to a common H-RNTI are valid configuration if the setting of the common variable is a close state.