IP Library Granted Patent US 8,611,917
Granted Patent B2
US 8,611,917 · App. 13/617,766 · Granted Dec 17, 2013

LTE and LTE-advanced UL power control

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,611,917
App. No.
13/617,766
Granted
Dec 17, 2013
Kind
B2
Abstract

A method for LTE and LTE-A uplink power control includes open loop power control where user equipment UE measures downlink pathloss which is sent to an eNodeB that determines uplink UL transmit power based on the downlink pathloss.

Claims (6)

1. A method for long term evolution LTE uplink power control for communications between a plurality of both eNodeB and user equipment UE, said method comprising the steps of:

measuring by user equipment UE downlink pathloss which is sent to an eNodeB that determines uplink UL transmit power based on the downlink pathloss, under an open loop power control that is selected; and

measuring by a neighboring eNodeB interference power on each resource block that is sent to a serving eNodeB, the serving eNodeB computing an average interference power for each scheduled user and determines a most strongly interfered neighbor eNodeB by each UE, setting a power adjustment based on a target interference and an average maximum interference power, updating the power adjustment if a UE is not sufficiently scheduled and setting an uplink transmit power, under a closed loop power control that is selected.

2. The method of claim 1 , wherein said downlink pathloss includes pathloss PL DLi PL DL i and PL DL,i strNB from the serving cell and the most strongly interfered neighboring cell, respectively.

3. The method of claim 1 , wherein the eNodeB determining uplink UL transmit power based on the downlink pathloss includes determining the transmit PSD, which is the per-RB transmit power.

4. The method of claim 3 , wherein the transmit PSD comprises PSD i =min(PSD max ,P 0 +α·PL DL,i +δ max ,Γ 0 +PL DL,i strNB ) where PSD max is the maximum transmit PSD, P 0 is the desired receiving power, α is the fraction of the pathloss compensation, δ max is the maximum power increase over FPC, and Γ 0 is the target interference power.

Assignments (3)
CORRECTIVE ASSIGNMENT TO CORRECT THE REMOVE 8538896 AND ADD 8583896 PREVIOUSLY RECORDED ON REEL 031998 FRAME 0667. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded May 30, 2017
From: NEC LABORATORIES AMERICA, INC.
To: NEC CORPORATION
Reel/Frame 042754/0703 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 14, 2014
From: NEC LABORATORIES AMERICA, INC.
To: NEC CORPORATION
Reel/Frame 031998/0667 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 14, 2012
From: ZHANG, HONGHAI; PRASAD, NARAYAN; RANGARAJAN, SAMPATH
To: NEC LABORATORIES AMERICA, INC.
Reel/Frame 028977/0951 →