HS-SICH Power Control Parameter Update in TDD Systems

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Solution Overview

Problem

The existing 3GPP protocol is incomplete in updating power control parameters for the high speed shared information channel in TDD systems, particularly in LCR TDD mode, where parameters like PRX HS-SICH, TPC Step Size, and Ack-Nack Power Offset are not fully configured in the 'UPLINK PHYSICAL CHANNEL CONTROL' message, preventing timely and accurate updates of transmission power.

Innovation Solution

A method is introduced where the network side sends a 'UPLINK PHYSICAL CHANNEL CONTROL' message to the user equipment with specific power control parameters such as PRX HS-SICH, TPC Step Size, and Ack-Nack Power Offset, allowing the user equipment to replace stored parameters and recalculate transmission power based on updated values using specific formulas for open loop, closed loop, and transmission power offset adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the existing 3GPP protocol is used for updating power control parameters, then the system maintains compatibility with standard protocols, but the power control parameters cannot be updated timely and accurately due to incomplete parameter configuration in the message

Engineering Contradiction:

Improveaccuracy of power control parameter updateVSAvoidcompleteness of protocol parameter configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power control parameter update message is segmented into multiple information elements, each carrying specific parameters (PRX HS-SICH, TPC Step Size, Ack-Nack Power Offset). This allows comprehensive parameter updates to be transmitted through standardized message structures without requiring protocol changes, resolving the contradiction between protocol compatibility and parameter completeness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The existing 'UPLINK PHYSICAL CHANNEL CONTROL' message is made multi-functional by incorporating multiple power control parameters (open loop parameter PRX HS-SICH, closed loop parameter TPC Step Size, and power offset Ack-Nack Power Offset) within a single message framework. This universal message structure can handle different parameter update scenarios while maintaining standard protocol compatibility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Manufacturing precision

If the network side sends comprehensive power control parameters in the control message, then all parameters can be updated accurately, but the message complexity and information overhead increase

Engineering Contradiction:

Improveprecision of parameter updateVSAvoidinformation overhead in control message

Core Design Contradiction:

Manufacturing precisionVSLoss of information

Solution Approach 1:

The network side selectively includes only the necessary power control parameters in the update message based on current system conditions and UE requirements. Rather than always transmitting all possible parameters, the message contains precisely what is needed for the specific update scenario, reducing information overhead while maintaining update precision.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system dynamically changes which parameters are included in the control message based on operational needs. Different combinations of parameters (PRX HS-SICH, TPC Step Size, Ack-Nack Power Offset) are transmitted depending on whether open loop, closed loop, or hybrid power control is being adjusted, optimizing the balance between precision and information efficiency.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If separate messages are sent for each power control parameter, then each parameter can be updated independently, but the update time and signaling overhead increase

Engineering Contradiction:

Improveindependence of parameter updateVSAvoidparameter update time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

Multiple power control parameters (open loop PRX HS-SICH, closed loop TPC Step Size, and power offset Ack-Nack Power Offset) are merged into a single 'UPLINK PHYSICAL CHANNEL CONTROL' message. This combining approach allows independent parameter values to be transmitted together in one signaling event, reducing update time and overhead while maintaining the ability to update each parameter independently based on its specific needs.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP1991010B1Method for updating the power control parameter and the transmitting power of the high speed share information channel

Publication Date: 2013.08.14 ZTE CORP

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AI summary

The present invention discloses a method for updating the power control parameter of high speed shared information channel, including: when a network side determines to update the power control parameter of the high speed shared information channel configured for an user equipment, it transmits an "uplink physical channel control" message to the user equipment, the message includes one or more of the following parameters: PRXHS-SICH, TPC step size, Ack-Nack Power Offset and HS-SICH Power Control Info; the user equipment replaces the corresponding parameter which is originally stored according to the power control parameter in the received message. The present invention also discloses a method for updating the transmission power of the high speed shared information channel of the user equipment. The present invention realizes the timely and accurate update for the power control parameter of TDD system at the network side, and the update of the transmission power according to the updated power control parameter in time.