Radio network node, user equipment and methods therein
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsErik Eriksson, David Astely
Life of this patent
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Abstract
Some embodiments herein relate to method in a user equipment for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, which user equipment is served by a radio network node in the radio communications network. The user equipment receives, from the radio network node, an indication indicating a set of power control parameters out of multiple sets of power control parameters, which multiple sets of power control parameters are stored at the user equipment. The user equipment determines a transmit power based on the indicated set of power control parameters.
Claims8
A method in a user equipment for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, wherein the user equipment is served by a radio network node in the radio communications network, the method comprising:
- receiving, from the radio network node, an indication indicating a set of power control parameters out of multiple sets of power control parameters, wherein the multiple sets of power control parameters are stored at the user equipment;
- and
- determining the transmit power based on the indicated set of power control parameters;
- and
- wherein the receiving further comprises to receive an accumulative power command, wherein the determining comprises to accumulate the accumulative power command with a previously used power command, and wherein different accumulations are done for different sets of power control parameters;
- wherein the set of power control parameters comprise at least one of:
- a maximum transmit power;
- a target received power, a value indicating percentage of a pathloss that is to be taken into account when determining transmit power, a power offset value, and/or a power command value;
- and
- wherein the determining comprises to determine transmit power using a formula defined as
- P
- PUSCH
- ,
- c
-
- (
- i
- )
- =
- min
-
- {
- P
- CMAX
- ,
- c
-
- (
- i
- )
- ,
- 10
-
-
- log
- 10
-
- (
- M
- PUSCH
- ,
- c
-
- (
- i
- )
- )
- +
- P
- O
-
- _
-
- PUSCH
- ,
- c
-
- (
- j
- )
- +
- α
- c
-
- (
- j
- )
- ·
- PL
- c
- +
- Δ
- TF
- ,
- c
-
- (
- i
- )
- +
- f
- c
-
- (
- i
- )
- }
- where:
- PPUSCH,c(i) is a transmit power for subframe i over a physical uplink shared channel;
- PCMAX,c(i) is a maximum transmit power;
- MPUSCH,c(i) is a bandwidth of a Physical Uplink Shared Channel resource assignment expressed in number of resource blocks;
- PO_PUSCH,c(j) is a target received power;
- αcϵ{0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}, and is a value indicating percentage of a pathloss that is to be taken into account when determining transmit power;
- PLc is a downlink path loss estimate;
- ΔTF,c(i) is a power offset value;
- and
- fc(i) is a power command value.
A user equipment for determining a transmit power to be used by the user equipment when transmitting in a radio communications network, wherein the user equipment is configured to be served by a radio network node in the radio communications network, wherein the user equipment comprises:
- a memory configured to have multiple sets of power control parameters stored thereon;
- a receiver configured to receive, from the radio network node, an indication indicating a set of power control parameters out of the stored multiple sets of power control parameters;
- and
- a determining circuit configured to determine a transmit power based on the indicated set of power control parameters;
- and
- wherein the receiver is further configured to receive an accumulative power command, and wherein the determining circuit is configured to accumulate the accumulative power command with a previously used power command, and to accumulate differently for different sets of power control parameters;
- wherein the set of power control parameters comprise at least one of:
- a maximum transmit power;
- a target received power, a value indicating percentage of a pathloss that is to be taken into account when determining transmit power, a power offset value, and/or a power command value;
- and
- wherein the determining circuit is configured to determine transmit power using a formula defined as
- P
- PUSCH
- ,
- c
-
- (
- i
- )
- =
- min
-
- {
- P
- CMAX
- ,
- c
-
- (
- i
- )
- ,
- 10
-
-
- log
- 10
-
- (
- M
- PUSCH
- ,
- c
-
- (
- i
- )
- )
- +
- P
- O_PUSCH
- ,
- c
-
- (
- j
- )
- +
- α
- c
-
- (
- j
- )
- ·
- PL
- c
- +
- Δ
- TF
- ,
- c
-
- (
- i
- )
- +
- f
- c
-
- (
- i
- )
- }
- where:
- PPUSCH,c(i) is a transmit power for subframe i over a physical uplink shared channel;
- PCMAX,c(i) is a maximum transmit power;
- MPUSCH,c(i) is a bandwidth of a Physical Uplink Shared Channel resource assignment expressed in number of resource blocks;
- PO_PUSCH,c(j) is a target received power;
- αcϵ{0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}, and is a value indicating percentage of a pathloss that is to be taken into account when determining transmit power;
- PLc is a downlink path loss estimate;
- ΔTF,c(i) is a power offset value;
- and
- fc(i) is a power command value.
Dependencies are inferred from the claim text.