E-DCH Power Calculation for HSPA Uplink

Solution Overview

Problem

In High Speed Packet Access (HSPA) communication networks, the current method of calculating available E-DCH power only considers HS-DPCCH power consumption in the first slot, leading to power limitations and decreased E-DCH quality, resulting in unnecessarily high grants and reduced HS-DPCCH quality.

Innovation Solution

A method and arrangement that determine the power consumption for acknowledgement/negative acknowledgement and channel quality indicator transmissions on an uplink channel during an enhanced dedicated channel transmission, allowing for the selection of a transport format combination based on this power consumption, thereby predicting and accounting for HS-DPCCH power consumption across the entire transmission time interval.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If HS-DPCCH power consumption is only considered in the first slot, then the calculation is simple, but power limitations occur and E-DCH quality decreases

Engineering Contradiction:

Improvepower calculation complexityVSAvoidE-DCH quality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies preliminary action by predicting HS-DPCCH power consumption in advance for all slots within the TTI based on the scheduled E-TFCs. This allows the system to account for future power requirements before making E-TFC selection decisions, preventing power limitations and maintaining E-DCH quality without excessive calculation complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by making the power consumption calculation adaptive to the scheduled E-TFCs for each slot. Instead of using a fixed first-slot-only approach, the system dynamically adjusts power predictions based on the actual transport format combinations that will be transmitted in each slot, optimizing both accuracy and resource utilization

Inventive Principle:

Principle #15Dynamics

2Reliability

If HS-DPCCH power consumption is predicted for the whole TTI, then power limitation is avoided and E-DCH quality is maintained, but calculation complexity increases

Engineering Contradiction:

Improvepower availabilityVSAvoidpower calculation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by predicting HS-DPCCH power consumption in advance for all slots within the TTI based on the scheduled E-TFCs. This allows the system to account for future power requirements before making E-TFC selection decisions, preventing power limitations and maintaining E-DCH quality without excessive calculation complexity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system performs self-service by autonomously predicting its own HS-DPCCH power consumption requirements based on the scheduled E-TFCs. The UE independently calculates the power needed for ACK/NACK and CQI transmissions in each slot, eliminating the need for complex network-side calculations and reducing overall system complexity while ensuring power availability

Inventive Principle:

Principle #25Self-service

3Productivity

If available E-DCH power is overestimated, then higher data rates can be selected, but power limitations occur leading to transmission failures

Engineering Contradiction:

Improvedata transfer rateVSAvoidtransmission reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent implements feedback by using the predicted HS-DPCCH power consumption to adjust the available E-DCH power calculation. The system continuously monitors the power requirements of control channels and feeds this information back into the E-TFC selection process, ensuring that power allocations are realistic and do not lead to transmission failures while still maximizing data transfer rates within available power constraints

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements dynamics by making the power consumption calculation adaptive to the scheduled E-TFCs for each slot. Instead of using a fixed first-slot-only approach, the system dynamically adjusts power predictions based on the actual transport format combinations that will be transmitted in each slot, optimizing both accuracy and resource utilization

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS8547952B2Method for selecting an enhanced transport format combination based on determined power consumption

Publication Date: 2013.10.01 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

The present invention related to a method and an arrangement for selecting an enhanced transport format combination used for maximizing power utilization efficiency and power limitation avoidance in a communication network system comprising a communication network entity communicating with a plurality of user equipments on uplink and downlink channels over a radio interface. A power consumption for an acknowledgement/negative acknowledgement transmission and a channel quality indicator transmission is determined on an uplink channel during an enhanced dedicated channel transmission. Thereby, a transport format combination is selected based on said determined power consumption.