Primary Carrier Power Estimation for Radio Link Failure Warnings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multicarrier wireless communications systems, primary carrier radio link failures can lead to a lack of direct power control instructions, making it difficult for network nodes to determine suitable transmission power for messages, especially for critical radio link failure warnings, which can result in service interruptions and reduced network reliability.
Innovation Solution
A method to estimate suitable transmission power for primary carrier radio link failure warning messages by using the last set of power control information and accounting for changes in radio conditions, including path loss and fading, even in the absence of direct power control messages, allowing network nodes to transmit messages effectively without causing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-carrier functionality is provided to increase data throughput, then network capacity and data transmission capability are improved, but complexity of power control and reliability of primary carrier communication deteriorate
Solution Approach 1:
The network node uses its own previously transmitted power control information and received signal measurements to autonomously evaluate appropriate transmission power for warning messages, without requiring external power control instructions during the critical failure warning phase
Solution Approach 2:
The network node stores and utilizes previously received power control information before primary carrier failure occurs, preparing power evaluation capabilities in advance to ensure rapid and reliable warning message transmission when the primary carrier fails
2Measurement precision
If direct power control instructions are used for transmission power determination, then transmission power accuracy is improved, but reliability of communication deteriorates when power control messages are unavailable
Solution Approach 1:
The network node uses previously received power control information as an intermediary to determine transmission power for warning messages when direct real-time power control instructions are unavailable, bridging the gap between historical data and current transmission needs
Solution Approach 2:
The network node creates a copy or replica of previously valid power control information and uses this copied data to evaluate transmission power for critical warning messages when the original real-time control channel is unavailable
3Reliability
If transmission power is increased to ensure reliable warning message delivery, then communication reliability is improved, but interference to other network nodes increases
Solution Approach 1:
The network node uses feedback from previously received power control information and current signal quality measurements to dynamically evaluate and adjust transmission power, achieving reliable warning message delivery while minimizing unnecessary interference through precision power control
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method of evaluating transmission power for transmission of a message between a first network node and a second network node in a multicarrier wireless communications system in which a predetermined set of a plurality of carriers are utilised to support communication between said first network node and said second network node, said predetermined set of said plurality of carriers comprising a primary carrier and at least one secondary carrier. The method comprises the steps of: determining an initial indication of appropriate power setting to enable a message to be transmitted between said first and second network nodes on said primary carrier; determining that there is a message to be sent between said first and second network node at a transmission time after receipt of said initial indication; and evaluating, based on said initial indication, an appropriate power setting to enable a message to be transmitted between said first and second network nodes on said primary carrier at said transmission time. Accordingly, a network node may be operable to evaluate an estimation of required transmission power to ensure a message reaches a second network node, even without frequent updates of usually received power control messages.