Mobile terminal and method of displaying image using the same
An information format and apparatus used by a base station to make a scheduling decision when the base station allocates resource to a terminal in a mobile communication system are provided. Operations of a terminal to report a maximum transmission power accurately to the base station in a scheduling process are also provided. A method for calculating a maximum transmit power in a constant manner regardless of a channel status is also provided.
1. A method for reporting power headroom by a terminal in a mobile communication system, the method comprising:
receiving information indicating a first power headroom report (PHR) format;
determining whether a PHR is triggered; and
transmitting a maximum transmit power (P CMAX ) and a power headroom (PH) associated with at least one activated carrier in the PHR using the first PHR format, the PH being obtained based on the P CMAX .
2. The method of claim 1 , wherein the P CMAX and the PH are determined for each serving cell if more than one serving cell is configured.
3. The method of claim 1 ,
wherein the first PHR format comprises an extended PHR medium access control (MAC) control element (CE),
wherein the extended PHR MAC CE comprises at least one PH field and at least one P CMAX field associated with the at least one activated carrier, and
wherein at least one P CMAX field respectively corresponds to at least one PH field.
4. The method of claim 1 , further comprising:
if a simultaneous transmission a for a physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) is configured, obtaining a value of a type 2 PH; and
transmitting the value of the type 2 PH and a P CMAX used for determining the value of the type 2 PH.
5. The method of claim 4 , wherein the value of the type 2 PH is determined based on a P CMAX of a first cell, a PUSCH transmit power and a PUCCH transmit power.
6. A terminal for reporting power headroom (PH) in a mobile communication system, the terminal comprising:
a transceiver for transmitting and receiving a signal; and
a controller for controlling to
receive information indicating a first power headroom report (PHR) format,
determine whether PHR is triggered, and to
transmit a maximum transmit power (P CMAX ) and a power headroom (PH) associated with at least one activated carrier in the PHR using the first PHR format, the PH being obtained based on the P CMAX .
7. The terminal of claim 6 , wherein the P CMAX and the PH are determined for each serving cell if more than one serving cell is configured.
8. The terminal of claim 6 ,
wherein the first PHR format comprises an extended PHR medium access control (MAC) control element (CE),
wherein the extended PHR MAC CE comprises at least one PH field and at least one P CMAX field associated with the at least one activated carrier, and
wherein at least one P CMAX field respectively corresponds to at least one PH field.
9. The terminal of claim 6 , wherein the controller is further configured to:
obtain a value of a type 2 PH if a simultaneous transmission for a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) is configured, and
transmit the value of the type 2 PH and a P CMAX used for determining the value of the type 2 PH.
10. The terminal of claim 9 wherein the value of the type 2 PH is determined based on a P CMAX of a first cell, a PUSCH transmit power and a PUCCH transmit power.
11. A base station for receiving a power headroom report (PHR) in a mobile communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
identify information indicating a first PHR format based on a number of activated uplink carriers for a terminal,
transmit a control message comprising the information, and
receive a maximum transmit power (P CMAX ) and a power headroom (PH) associated with at least one activated uplink carrier for the terminal using the first PHR format, the PH being obtained based on the P CMAX .
12. The base station of claim 11 , wherein the P CMAX and the PH are determined for each serving cell if more than one serving cell is configured.
13. The base station of claim 11 ,
wherein the first PHR format comprises an extended PHR medium access control (MAC) control element (CE),
wherein the extended PHR MAC CE comprises at least one PH field and at least one P CMAX field associated with the at least one activated uplink carrier, and
wherein at least one P CMAX field respectively corresponds to at least one PH field.
14. The base station of claim 11 , wherein the controller is further configured to control to receive a value of a type 2 PH and a P CMAX used for determining the value of the type 2 PH if a simultaneous transmission for a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) is configured.
15. The base station of claim 14 , wherein the value of the type 2 PH is determined based on a P CMAX of a first cell, a PUSCH transmit power and a PUCCH transmit power.
16. A method for receiving a power headroom report (PHR) by a base station in a mobile communication system, the method comprising:
identifying information indicating a first PHR format based on a number of activated uplink carriers for a terminal;
transmitting a control message comprising the information; and
receiving a maximum transmit power (P CMAX ) and a power headroom (PH) associated with at least one activated uplink carrier for the terminal using the first PHR format, the PH being obtained based on the P CMAX .
17. The method of claim 16 , wherein the P CMAX and the PH are determined for each serving cell if more than one serving cell is configured.
18. The method of claim 16 , wherein the first PHR format comprises an extended PHR medium access control (MAC) control element (CE),
wherein the extended PHR MAC CE comprises at least one PH field and at least one P CMAX field associated with the at least one the activated uplink carrier for the terminal, and
wherein at least one P CMAX field respectively corresponds to at least one PH field.
19. The method of claim 16 , further comprising:
if a simultaneous transmission for a physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH) is configured, receiving a value of the type 2 PH and a P CMAX used for determining the value of type 2 PH.
20. The method of claim 19 , wherein the value of the type 2 PH is determined based on a P CMAX of a first cell, a PUSCH transmit power and a PUCCH transmit power.