Uplink power control

1. A method for uplink power control implemented in a wireless communications system including one or more user equipments, a serving base station, and at least one neighboring base station, the method comprising:

measuring, at each user equipment, pathloss;

sending, from each user equipment to the serving base station, the pathloss; and

determining, at the serving base station, uplink transmit power based on the pathloss,

measuring, at said at least one neighboring base station, interference power on a resource block sent to the serving base station;

computing, at the serving base station, an average interference power for each user equipment;

determining, at the serving base station, a neighboring base station most strongly interfered by each user equipment; and

setting, at the serving base station, a power adjustment based on a target interference power and an average maximum interference power.

2. The method as in claim 1 , wherein the pathloss comprises downlink pathloss.

3. The method as in claim 2 , wherein the downlink pathloss comprises pathloss PL DL i from the serving base station and PL DL,i strNB from the most strongly interfered neighboring base station.

4. The method as in claim 1 , wherein the determination comprises:

determining per-resource block (RB) transmit power (transmit power spectral density (PSD)).

5. The method as in claim 4 , 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 maximum transmit PSD, P 0 is desired receiving power, α is a fraction of pathloss compensation, δ max is a maximum power increase over fractional power control (FPC), and Γ 0 is target interference power.

6. A method for uplink power control implemented in a serving base station used in a wireless communications system including one or more user equipments and at least one neighboring base station, the method comprising:

receiving, from each user equipment, pathloss;

determining uplink transmit power based on the pathloss;

computing an average interference power for each user equipment;

determining a neighboring base station most strongly interfered by each user equipment; and

setting a power adjustment based on a target interference power and an average maximum interference power,

wherein each user equipment measures the pathloss, and

wherein said at least one neighboring base station measures interference power on a resource block sent to the serving base station.

7. The method as in claim 6 , wherein the pathloss comprises downlink pathloss.

8. The method as in claim 7 , wherein the downlink pathloss comprises pathloss P DL i from the serving base station and PL DL,i strNB from the most strongly interfered neighboring base station.

9. The method as in claim 6 , wherein the determination comprises:

determining per-resource block (RB) transmit power (transmit power spectral density (PSD)).

10. The method as in claim 9 , 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 maximum transmit PSD, P 0 is desired receiving power, a is a fraction of pathloss compensation, δ max is a maximum power increase over fractional power control (FPC), and Γ 0 is target interference power.

11. A method for uplink power control implemented in a user equipment used in a wireless communications system including a serving base station and at least one neighboring base station, the method comprising:

measuring pathloss; and

sending to the serving base station the pathloss,

wherein the serving base station determines uplink transmit power based on the pathloss,

wherein said at least one neighboring base station measures interference power on a resource block sent to the serving base station,

wherein the serving base station computes an average interference power for each user equipment,

wherein the serving base station determines a neighboring base station most strongly interfered by each user equipment, and

wherein the serving base station sets a power adjustment based on a target interference power and an average maximum interference power.

12. The method as in claim 11 , wherein the pathloss comprises downlink pathloss.

13. The method as in claim 12 , wherein the downlink pathloss comprises pathloss PL DL i from the serving base station and PL DL,i strNB from the most strongly interfered neighboring base station.

14. The method as in claim 11 , wherein the determination comprises:

determining per-resource block (RB) transmit power (transmit power spectral density (PSD)).

15. The method as in claim 14 , 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 maximum transmit PSD, P 0 is desired receiving power, α is a fraction of pathloss compensation, δ max is a maximum power increase over fractional power control (FPC), and Γ 0 is target interference power.