IAB Node MAC CE Message Power Control
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Solution Overview
Problem
In wireless communication networks, particularly in IAB systems, there is a challenge in transmitting MAC CE messages effectively, as information about resource configuration, transmission power, and multiplexing modes is often unknown or not accurately conveyed, affecting the power headroom signaling and multiplexing operations between IAB nodes.
Innovation Solution
The method involves transmitting a MAC CE message by an IAB node that includes an ID associated with a resource configuration, transmission power offset, maximum transmission power, multiplexing mode, uplink beam identifiers, and indications of association with MT and DU, enabling the parent node to apply the indicated power range and multiplexing mode, thus facilitating efficient power control and multiplexing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MAC CE messages are transmitted without comprehensive resource configuration information, then transmission simplicity is maintained, but power headroom signaling accuracy deteriorates
Solution Approach 1:
The MAC CE message is segmented into multiple fields, each carrying specific resource configuration information (transmission power offset, maximum transmission power, multiplexing mode, beam identifiers, etc.). This segmentation allows the message to convey comprehensive power control parameters while maintaining a structured and manageable format for transmission.
Solution Approach 2:
The patent introduces specific parameter fields within the MAC CE message, such as transmission power offset values and maximum transmission power indicators. These parameter changes enable precise power headroom signaling by explicitly defining power control parameters that the receiving node can use for accurate power management decisions.
2Quantity of substance
If transmission power parameters are not explicitly indicated, then message brevity is maintained, but power control reliability deteriorates
Solution Approach 1:
The MAC CE message includes preliminary indication fields that explicitly specify transmission power parameters before the actual power control operation. By including transmission power offset and maximum transmission power indicators in advance, the system ensures reliable power control without requiring subsequent complex negotiations or assumptions.
Solution Approach 2:
The MAC CE message acts as an intermediary carrier that explicitly conveys power control parameters from the controlling node to the controlled node. This intermediary mechanism ensures reliable power control by providing clear, unambiguous power parameter indications that bridge the power control decision and execution.
3Loss of information
If multiplexing mode information is omitted, then signaling overhead is reduced, but resource allocation accuracy deteriorates
Solution Approach 1:
The patent merges multiple important information elements (multiplexing mode, beam identifiers, resource configuration) into a single integrated MAC CE message structure. This merging approach conveys comprehensive resource allocation information efficiently while minimizing signaling overhead through compact field design and consolidation.
Solution Approach 2:
The MAC CE message is designed with multi-functionality, serving as a universal carrier for various resource configuration parameters including multiplexing mode, power control settings, and beam information. This universal structure allows accurate resource allocation without requiring separate dedicated signaling messages for each parameter type.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for transmitting a MAC CE message by an IAB node. One method includes transmitting, at a first IAB node, a MAC CE message to a second IAB node. The MAC CE message includes: an ID associated with a resource configuration; a transmission power offset value; a maximum transmission power value; information corresponding to a multiplexing mode; at least one uplink beam identifier; a first indication of association with a MT of the first IAB node; a second indication of association with a cell of a DU of the first IAB node; or some combination thereof.