Method and Arrangement for Controlling Uplink Transmit Power

• US 20110237289A1
• Filed: 03/18/2011
• Published: 09/29/2011
• Est. Priority Date: 03/24/2010
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Bogdan, Timus, Fodor, Gabor, Kazmi, Muhammad
• Granted Patent: US 8,452,321 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The present invention relates to methods and arrangements for controlling uplink transmit power to be used by the UE. The UE comprises multiple radio interfaces wherein at least one of the multiple interfaces is a cellular radio interface. The UE stores information comprising a total transmit power budget set aside for use over the multiple radio interfaces of the UE and receives transmit power control commands from a network node on the cellular radio interface indicating whether the UE should increase or decrease or maintain the uplink transmit power on the cellular radio interface. Transmit power levels to be used for uplink transmissions over the multiple radio interfaces based on the received transmit power control commands are calculated, wherein the said total transmit power budget for the multiple radio interfaces is taken into account.

Claims

1. A method in a User Equipment, UE, for controlling uplink transmit power to be used by the UE, the UE comprises multiple radio interfaces wherein at least one of the multiple interfaces is a cellular radio interface, the method comprises the steps of:

storing information comprising a total transmit power budget set aside for use over the multiple radio interfaces of the UE,

receiving from a network node on the cellular radio interface transmit power control commands indicating whether the UE should increase or decrease or maintain the uplink transmit power on the cellular radio interface, and

calculating transmit power levels to be used for uplink transmissions over the multiple radio interfaces based on the received transmit power control commands, wherein the said total transmit power budget for the multiple radio interfaces is taken into account.

2. The method according to claim 1, wherein the stored information comprises profile information comprising at least one profile for a communication scenario indicating at least a first and a second radio interface of said multiple radio interfaces to be used associated with maximum transmit power levels to be used for the respective radio interfaces, wherein the sum of the maximum transmit power levels to be used for the respective radio interfaces shall not exceed the total transmit power budget of the UE.

3. The method according to claim 1, wherein the method comprises the further step of:

sending the stored information to the network node such that the network node can take the total transmit power budget into account when determining the transmit power control commands to be sent to the UE.

4. The method according to claim 1, wherein said total transmit power budget is taken into account in the UE when calculating the transmit power levels to be used for uplink transmissions.

5. A method in a network node of a cellular communication network for controlling uplink transmit power to be used by a User Equipment, UE, comprising multiple radio interfaces, the method comprises the steps of:

receiving information comprising a total transmit power budget set aside for use over the multiple radio interfaces of the UE,

determining transmit power control commands for the UE indicating whether the UE should increase or decrease or maintain the uplink transmit power taking said total transmit power budget into account, and

sending the determined transmit power control commands to the UE.

6. The method according to claim 5, wherein the received information comprises profile information comprising at least one profile for a communication scenario indicating at least a first and a second radio interface to be used associated with maximum transmit power levels to be used for the respective radio interfaces, wherein the sum of the maximum transmit power levels to be used for the respective radio interfaces shall not exceed the total transmit power budget of the UE.

7. A User Equipment, UE, for controlling uplink transmit power to be used by the UE, the UE comprises multiple radio interfaces wherein at least one of the multiple interfaces is a cellular radio interface, the UE comprises a memory for storing information comprising a total transmit power budget set aside for use over the multiple radio interfaces of the UE, a receiver for receiving transmit power control commands from a network node on the cellular radio interface indicating whether the UE should increase or decrease or maintain the uplink transmit power on the cellular radio interface, and a power control unit for calculating transmit power levels to be used for uplink transmissions over the multiple radio interfaces based on the received power control commands, wherein the said total transmit power budget for the multiple radio interfaces is taken into account.

8. The UE according to claim 7, wherein the stored information comprises profile information comprising at least one profile for a communication scenario indicating at least a first and a second radio interface to be used associated with maximum transmit power levels to be used for the respective radio interfaces, wherein the sum of the maximum transmit power levels to be used for the respective radio interfaces shall not exceed the total transmit power budget of the UE.

9. The UE according to claim 7, wherein the UE comprises a transmitter for sending the stored information to the network node such that the network node can take the total transmit power budget into account when determining the power control commands to be sent to the UE.

10. The UE according to claim 7, wherein the power control unit is configured to take said total transmit power budget into account when calculating the power levels to be used for uplink transmissions.

11. A network node of a cellular communication network for controlling uplink transmit power to be used by a User Equipment, UE, comprising multiple radio interfaces, the network node comprises a receiver for receiving information comprising a total transmit power budget set aside for use over the multiple radio interfaces of the UE, a power controller for determining transmit power control commands for the UE indicating whether the UE should increase or decrease or maintain the uplink transmit power taking said total transmit power budget into account, and a transmitter for sending the determined transmit power control commands to the UE.

12. The network node according to claim 11, wherein the received information comprises profile information comprising at least one profile for a communication scenario indicating at least a first and a second radio interface to be used associated with maximum transmit power levels to be used for the respective radio interfaces, wherein the sum of the maximum transmit power levels to be used for the respective radio interfaces shall not exceed the total transmit power budget of the UE.

13. The network node according to claim 11, wherein the network node is a base station.