Inter-cell power control for interference management
AssigneeQUALCOMM Incorporated
InventorsDurga Prasad Malladi, Xiaoxia Zhang
Life of this patent
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Abstract
A system and method for inter-cell power control for interference management in an OFDM system is provided. The system provides for a combination use of open loop and closed loop PSD control algorithms. The open loop control is a function of path loss from the serving cell as well as the neighboring cells. The closed loop control updates the end node transmit PSD by listening to the load indicators from the serving cell and at least one other neighboring non-serving cell which generates the highest level of interference. The system thus provides a fast and tight control with multi-cell information that allows improved inter-cell interference control.
Claims34
A method that facilitates inter-cell interference control in a wireless communication system, comprising:
- establishing a target received signal-to-noise ratio (SNR) based on one or more path loss readings from both an end node to a serving node and from the end node to one or more neighboring non-serving nodes;
- using an open loop power control at an onset of use of the end node or at a change in a path loss function for the end node outside of a threshold;
- and
- switching from the open loop power control to a closed loop power control following establishing the target received SNR and an initial pass of the open loop power control.
A non-transitory computer readable medium having stored thereon computer executable instructions for performing the following acts:
- establishing a target received signal-to-noise ratio (SNR) based on one or more path loss readings from both an end node to a serving node and from the end node to one or more neighboring non-serving nodes;
- using an open loop power control at an onset of use of the end node or at a change in a path loss function for the end node outside of a threshold;
- and
- switching from the open loop power control to a closed loop power control following establishing the target received SNR and an initial pass of the open loop power control.
A processor for controlling inter-cell interference in a wireless communication system that executes computer executable code stored on a storage medium to:
- establish a target received signal-to-noise ratio (SNR) based on one or more path loss readings from both an end node to a serving node and from the end node to one or more neighboring non-serving nodes;
- use an open loop power control at an onset of use of the end node or at a change in a path loss function for the end node outside of a threshold;
- and
- switch from the open loop power control to a closed loop power control following establishing the target received SNR and an initial pass of the open loop power control.
A system that that facilitates inter-cell interference control in a wireless communication system, comprising
- means for establishing a target received signal-to-noise ratio (SNR) based on one or more path loss readings from both an end node to a serving node and from the end node to one or more neighboring non-serving nodes;
- means for using an open loop power control at an onset of use of the end node or at a change in a path loss function for the end node outside of a threshold;
- and
- means for switching from the open loop power control to a closed loop power control following establishing the target received SNR and an initial pass of the open loop power control.
Dependencies are inferred from the claim text.