DPCCH Transmission Control for Uplink Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 3GPP protocol for HSUPA services in UMTS systems experiences reduced uplink system capacity and increased interference due to continuous DPCCH transmission in deactivated HARQ processes, which also shortens the standby time of user equipment (UE).
Innovation Solution
A power control method where a base station monitors UE and cell information to determine if the UE has the capability to disable DPCCH transmission in deactivated HARQ processes, and notifies the UE to disable or enable DPCCH transmission based on preset entry and exit conditions, specifically when the ROT or overload rate exceeds or falls below target thresholds, using a downlink HS-SCCH order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DPCCH transmission continues in deactivated HARQ processes, then control information can be transmitted, but uplink interference increases and system capacity decreases
Solution Approach 1:
The patent implements discontinuous transmission of DPCCH in deactivated HARQ processes by periodically activating and deactivating transmission based on data availability. The base station sends activation/deactivation commands to control when DPCCH transmission occurs, transforming continuous transmission into periodic action that matches actual data transmission needs, thereby reducing interference while maintaining control information transmission capability.
Solution Approach 2:
The patent makes the DPCCH transmission state dynamic by introducing activation and deactivation commands from the base station. The transmission state transitions between active and inactive based on real-time network conditions and data availability, allowing the system to adaptively adjust transmission behavior to minimize interference while maintaining reliability when needed.
2Reliability
If DPCCH transmission continues in deactivated HARQ processes, then control information is available, but UE energy consumption increases and standby time decreases
Solution Approach 1:
The patent reduces UE energy consumption by implementing periodic DPCCH transmission only when data is available for transmission. The base station monitors data buffers and sends activation commands only when needed, allowing the UE to enter low-power states during periods without data, thereby extending standby time while maintaining control information transmission reliability when required.
Solution Approach 2:
The patent enables the UE to dynamically adjust its transmission behavior based on network commands without continuous high-power operation. The UE responds to activation/deactivation commands by transitioning between transmission and low-power states, allowing the system to self-regulate energy consumption based on actual service requirements rather than maintaining constant transmission power.
3Productivity
If DPCCH transmission is disabled in deactivated HARQ processes, then uplink interference reduces and system capacity increases, but control information transmission capability is lost
Solution Approach 1:
The patent resolves this contradiction by making DPCCH transmission dynamic rather than static. The base station monitors the data buffer status of each HARQ process and sends activation commands when data becomes available, ensuring control information transmission capability is restored exactly when needed. This dynamic approach allows the system to maximize capacity during idle periods while maintaining reliability when data transmission is required.
Solution Approach 2:
The patent implements a feedback mechanism where the base station monitors data buffer status and sends activation/deactivation commands to control DPCCH transmission. This feedback loop ensures that transmission is enabled only when there is actual data to send, preventing unnecessary transmission during idle periods while guaranteeing control information availability when needed, thus balancing capacity and reliability.
Data Source
Figure 1~2
Figure 3~5
AI summary
The present invention provides a power control method, system, device and computer storage medium, wherein the method includes, when it is determined that a preset entry condition is met, a base station notifying a user equipment (UE) to disable a dedicated physical control channel (DPCCH) transmission during a deactivated hybrid automatic repeat request (HARQ) process (101); when it is determined that a preset exit condition is met, the base station notifying the UE to enable the DPCCH transmission (102) in a deactivated HARQ process.