Dynamic Power Control Signaling in Wireless Communications
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Solution Overview
Problem
In wireless communication systems, power control resources are often assigned statically, leading to non-optimal use of resources as some user equipment (UEs) may not be transmitting or may be transmitting at non-optimal power levels, resulting in inefficient resource allocation and potential interference.
Innovation Solution
A method and apparatus for dynamically controlling power in wireless communication systems by identifying UEs transmitting at non-optimal power levels, generating power control messages with mapped commands to specific resources, and transmitting these messages to adjust power levels, allowing for dynamic signaling and efficient resource allocation based on radio conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power control resources are assigned statically to all UEs, then every UE can receive power control commands, but resources are wasted when UEs are not transmitting or transmitting at optimal power levels
Solution Approach 1:
The patent implements dynamic power control resource allocation where the base station determines which UEs require power control commands based on current transmission status and radio conditions. Power control resources are dynamically assigned only to UEs that need adjustments, transforming the static allocation system into a dynamic one that adapts to real-time network conditions, thereby eliminating resource wastage while maintaining reliability.
Solution Approach 2:
The system changes the parameter of power control resource allocation from a fixed static state to a variable dynamic state. The base station monitors transmission power levels and radio conditions, then adjusts the allocation of power control resources accordingly, changing the operational parameters based on actual network needs rather than maintaining constant allocation.
2Reliability
If power control commands are transmitted to all UEs continuously, then all UEs can maintain optimal power levels, but system efficiency decreases due to unnecessary signaling
Solution Approach 1:
The patent extracts and isolates only the UEs that require power control commands from the entire UE population. The base station identifies specific UEs with non-optimal power levels and allocates power control resources only to those extracted targets, rather than transmitting commands to all UEs continuously. This extraction approach eliminates unnecessary signaling while maintaining power optimization for those who need it.
Solution Approach 2:
Instead of applying power control commands universally to all UEs (excessive action), the system applies partial action only to the subset of UEs that actually require power adjustments. This partial approach avoids the waste of transmitting unnecessary commands to UEs already operating at optimal power levels, thereby improving system efficiency while maintaining reliability for those who need control.
3Productivity
If resources are dynamically allocated based on transmission needs, then resource efficiency improves, but complexity of power control management increases
Solution Approach 1:
The patent implements a feedback mechanism where UEs report their transmission status and power levels to the base station. The base station uses this feedback information to dynamically determine which UEs require power control commands and allocates resources accordingly. This feedback loop automates the decision-making process, managing the complexity through systematic information gathering and response rather than ad-hoc management.
Solution Approach 2:
The system enables UEs to self-identify their power control needs through their transmission behavior and reported status. The base station automatically detects which UEs require power adjustments based on their own transmission patterns and radio conditions, allowing the system to self-manage resource allocation without complex external intervention or manual configuration.
Data Source
AI summary
Downlink power control commands are mapped to resources used for uplink communications within a wireless communication system. A base station receives communications from UEs and determines the resources used by the UEs for those transmissions on the uplink which are transmitted at non-optimum power levels. Power control messages are formulated wherein the location of the power control commands is mapped to particular resources used by the UEs for their uplink transmissions. This facilitates the base station to dynamically assign resources for the power control commands while permitting the UEs to decode the power control messages to adjust their power accordingly.