Power headroom report method and apparatus for mobile communication system supporting carrier aggregation

Abstract

A method and user equipment (ue) for obtaining power headroom information in a communication system are provided. The method includes acquiring information for a path loss reference, wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (SCell), triggering a power headroom report (PHR) if a prohibitPHR-Timer expires and a path loss is changed more than a threshold for at least one activated cell which is used as the path loss reference, and obtaining power headroom information for each activated cell, if extended PHR is used and an uplink resource is allocated for new transmission.

Description

CROSS-REFERENCE TO RELATED APPLICATION

The PH(i) of the i^th subframe in the serving cell c is calculated with the maximum uplink transmission power P_CMAX,c(i), number of resource blocks M_PUSCH,c(i), power offset derived from MCS Δ_TF,c, Path Loss PL_c, and accumulated TPC commands f_c(i). In equation (1), PL_c denotes the pass loss of cell which provides information on the path loss in the service cell c. The path loss used to determine uplink transmission power of a certain serving cell is the path loss of the downlink channel of the corresponding cell or the path loss of a downlink channel of another cell. The cell of which path loss is to be used is selected by the eNB and notified to the UE in the call setup process. In equation (1), f_c(i) is the accumulated value of the accumulated Transmission Power Control (TPC) commands of the serving cell c. P_{O_PUSCH,C} denotes a higher layer parameter corresponding to the sum of cell-specific and UE-specific values. Typically, P_{O_PUSCH,C} is set to a value determined depending on the transmission type of the PUSCH such as semi-persistent scheduling, dynamic scheduling, and a random access response. α_c denotes a 3-bit cell specific value provided from a higher layer as the weight applied to the path loss when calculating uplink transmission power (i.e., the higher this value is, the more the path loss influences the uplink transmission power), and its value is limited according to the transmission type of the PUSCH. j denotes the transmission type of the PUSCH. The parameter j is set to 0 for semi-persistent scheduling, 1 for dynamic scheduling, and 2 for random access response. If there is no PUSCH transmission, M_PUSCH and Δ_TF are not applied to equation (1).

In the mobile communication system supporting carrier aggregation, there can be a serving cell in which no PUSCH transmission takes place and a serving cell in which PUSCH transmission takes place. Also, the PH for a serving cell can be reported in another serving cell. In the mobile communication system supporting carrier aggregation, when the PHs of multiple serving cells are to be reported, the UE can transmit the PHs in a single PHR. This method is advantageous in that it reduces the signaling overhead as compared to the method of transmitting the PHs individually, and the eNB can acquire the PH for the carrier on which no PUSCH is transmitted.

FIG. 5 is a diagram illustrating an exemplary scenario of PH reporting according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the diagram shows a scenario in which each of two serving cells CC1 and CC2 transmits the PHs of both the serving cells. In the time duration 505 for which PUSCH transmission takes place in CC1 but not in CC2, the UE can transmit MAC PDU 510 containing the CC1 PH 515 and CC2 PH 520. Also, in the time duration 525 for which PUSCH transmission takes place in CC2 but not in CC1, the UE can transmit MAC PDU 530 containing the CC1 H 535 and CC2 PH 540.

Typically, PHR is triggered when the path loss on the downlink carrier associated with an uplink carrier becomes equal to or greater than a predetermined threshold value or a predetermined time period has elapsed after creating a PHR in a serving cell.

The eNB provides a UE with the parameters related to the PHR trigger operation. The parameters include periodicPHR-Timer, prohibitPHR-Timer, and dl-PathlossChange. The periodicPHR-Timer is a timer for triggering PHR periodically. In order to prevent PHR from being triggered too frequently, the prohibitPHR-Timer is used. Also, PHR is triggered when the path loss of the downlink carrier associated with an uplink carrier becomes equal to or greater than a predetermined threshold value, which is referred to as dl-PathlossChange. In the PHR procedure of the related art, the downlink carrier associated with an uplink carrier is determined and fixed to a specific one. This means that the path loss on the downlink carrier associated with the corresponding uplink carrier is also fixed. In the system supporting carrier aggregation, however, there can be multiple downlink carriers that can be associated with one uplink carrier. In particular, the downlink carrier of which path loss is referenced can be a downlink carrier of another serving cell other than the same serving cell. At this time, the eNB notifies the UE of the cell in which path loss is referenced for determining uplink transmission power through an RRC signaling message. In the present exemplary embodiment, the eNB notifies the UE of the serving cell of which downlink carrier's path loss is to be referenced for a PHR trigger through an RRC control message. The serving cell of which the downlink carrier's path loss is referenced for uplink transmission power configuration for a certain serving cell and the serving cell of which downlink carrier's path loss is to be referenced for determining a PHR trigger can be identical with each other. In this case, it is possible to inform of the two items of information simultaneously rather than separately. In a case where a plurality of serving cells is managed by an eNB, the eNB notifies the UE of the use of extended PHR (or REL-10 PHR) and other information.

FIG. 6 is a diagram illustrating a principle of determining downlink carrier on which path loss is referenced according to an exemplary embodiment of the present invention.

Referring to FIG. 6, reference numbers 605, 610, and 615 denote serving cells 1, 2, and 3. A downlink carrier 620 of the serving cell 605 is associated with an uplink subcarrier 635 of the serving cell 605 and an uplink subcarrier 640 of the serving cell 610. Also, a downlink carrier 625 of the serving cell 610 is associated with an uplink subcarrier 640 of the serving cell 610. Meanwhile, the serving cell 615 has a downlink carrier 630 but no uplink carrier. Reference numbers 635 and 640 denote uplink carriers. In an Secondary Cell (SCell) configuration process, the uplink carriers 635 and 640 are linked with the downlink carriers 620 and 625. If the service cell 605 is configured as a Primary Cell (PCell), the path loss of the downlink carrier 620 is referenced to determine whether to trigger PHR for the uplink carrier 635. If the path loss of a downlink carrier is referenced, this means that the path loss of the downlink carrier is used for configuring the uplink transmission power originally, but the meaning is expended for a PHR trigger. That is, if the displacement of the path loss is considered as a condition for a PHR trigger, this means that the path loss of the indicated downlink carrier's path loss is applied. In order to trigger a PHR for uplink carrier 640, the path loss of the downlink carrier 620 can be referenced in place of that of the downlink carrier 625. The reason why the path loss of a downlink carrier of other cell is used is because the received power can be strong enough on a downlink carrier but weak on another downlink carrier. Accordingly, by using the path loss of the downlink carrier having good received signal strength, it is possible to acquire more accurate displacement of the path loss. The eNB notifies the UE of the downlink carrier of which path loss is previously referenced. When configuring a SCell, the serving cell of which path loss is referenced for calculating uplink transmission power of the SCell is indicated in RadioResourceConfigDedicatedSCell as SCell configuration information. Accordingly, a serving cell can provide the path loss information or not. If a serving cell provides pass loss information for the same serving cell or other serving cell, the UE can determine whether to trigger PHR by referencing the displacement of the path loss of the corresponding serving cell. That is, the UE determines whether to trigger PHR based on the displacement of the path loss of the currently activated serving cell. In more detail, the UE triggers PHR when the path loss of one or more serving cells changes by as much as a predetermined amount than the path loss at the most recent PHR transmission. Accordingly, if a serving cell is configured with an uplink carrier but does not provide a path loss, the UE does not trigger a PHR in response to the displacement of the path loss of the downlink carrier of the corresponding serving cell. In the UE procedure according to an exemplary embodiment of the present invention, if REL-10 PHR is configured with the SCell configuration and if a new uplink transmission takes place, the UE reports PHs for all of the activated serving cells that are configured with uplink carriers. This is to report the initial state after SCell configuration. In order to use to determine whether to trigger PHR afterward, the UE saves the path loss values of the downlink carriers. The UE monitors to determine whether the displacement of the path loss of the serving that is referenced for estimating the path loss of each uplink carrier exceeds dl-pathlosschange. If the path loss displacement is greater than dl-PathlossChange on at least one uplink carrier and if the prohibitPHR-Timer expires or has expired, the UE triggers PHR immediately for all of the activated serving calls configured with uplink carriers.

FIG. 7 is a flowchart illustrating a power headroom report method according to an exemplary embodiment of the present invention.

Referring to FIG. 7, the UE first configures an SCell along with a REL-10 PHR configuration in step 705. In a case where an eNB manages multiple serving cells, the extended PHR is used always. If an uplink grant for a new transmission is received in step 710 after the REL-10 PHR configuration, the UE triggers PHR for all activated service cells configured with uplink carriers in step 715. In order to determine whether to trigger PHR afterward, the UE saves the path losses of reference downlink carriers in step 720. Afterward, if an uplink grant for a new transmission is received in step 725, the UE determines whether prohibitPHR-Timer expires or has expired in step 730. If prohibitPHR-Timer has not expired, this means that PHR is prohibited, and thus the UE returns to step 725 and waits until a next uplink grant for a new transmission is received. If the prohibitPHR-Timer expires or has expired, the UE, in step 735, determines whether the path loss change on at least one downlink carrier associated, for path loss reference, with the uplink carrier is larger than dl-PathlossChange. If not, the UE returns to step 725 and waits until a next uplink grant for a new transmission is received. If so, the UE triggers PHR for all activated serving cells configured with uplink carriers.

If PHR is triggered, the UE calculates PHs for individual uplink carriers and configures an extended PHR. Even when there is no real PUSCH transmission, the eNB can trigger PHR to acquire path loss information on a specific uplink carrier. If PHR is triggered for a specific serving cell, the UE determines a PH calculation scheme depending on whether PUSCH is transmitted. If there is a PUSCH transmission in the corresponding serving cell, the UE calculates a PH according to the method of the related art using equation (1). If there is no PUSCH transmission in the serving cell, this means no transmission resource is allocated such that it is not clear to determine the values of M_PUSCH and Δ_TF and, as a consequence, a device allowing for the eNB and UE to calculate and interpret the PH using the same M_PUSCH and Δ_TF. This can be addressed with a fixed transmission format (e.g., a transmission resource amount and MCS level) for use in PH calculation in a case of no PUSCH transmission, the transmission format being agreed upon between the UE and the eNB. Assuming that the reference transmission format is a combination of 1 Resource Block (RB) and a lowest MCS level, both the M_PUSCH and Δ_TF are set to 0 and this is the same as omitting these parameters in equation (1). That is, since there is no real data transmission in the corresponding serving cell, no P_CMAX,c(i) exists. Accordingly, the value of P_CMAX,c(i) should be determined. For such a virtual transmission, virtual P_CMAX,c(i) is defined and adopted. P_CMAX,c(i) can be determined using the maximum allowed UE output power P_EMAX and nominal UE power P_PowerClass. For example, P_CMAX,c(i) can be determined as equation (2):
P_CMAX,c=min {P_EMAX,P_PowerClass}  (2)

P_CMAX has the relationship of P_{CMAX_L}≤P_CMAX≤P_PowerClass. Here, if zero power back-off is considered, P_{CMAX_L}=P_{CMAX_H} and thus P_CMAX=P_{CMAX_H}. At this time, P_CMAX is the least one of P_PowerClass and P_EMAX. P_EMAX is the cell-specific maximum allowed UE transmission power, and P_PowerClass is the UE-specific maximum allowed power.

Accordingly, when there is no PUSCH transmission in the corresponding serving cell, PH is defined as equation (3):
PH(i)=min{P_EMAX,P_PowerClass}−{P_{O_PUSCH,c}(j)+α_c(j)·PL_c+f_c(i)}  (3)
where P_{O_PUSCH,C}, α_c, f_c(i), and PL_c are set to the values of the serving cell for which PH is calculated for other than the serving cell in which PH is transmitted. The PH calculated by equation (3) is reported to the eNB along with other PHs in the PHR transmitted in other serving cell. The eNB can determine the PHs for individual serving cells with only one PHR. However, there is a problem in that the eNB does not know whether the individual serving cells' PHs carried in the PHR are calculated based on the real PUSCH transmissions or a PUSCH reference format. Without this information, it is not possible for the eNB to interpret the PHs correctly, resulting in inefficient scheduling. In order to address this problem, an indicator should be provided for indicating whether each PH is calculated based on the real PUSCH transmission or the PUSCH reference format in the PHR format of the related art. Accordingly, a calculation type indicator is included. The calculation type indicator can be configured with 1 bit. When reporting a PH for a certain cell, the UE sets the one-bit calculation type indicator to a predetermined value (e.g., 0) to indicate that the PH is calculated by applying a real transmission format or another value (e.g., 1) to indicate that the PH is calculated by applying the reference format (i.e., RB=0 and Δ_TF=0) because of no PUSCH transmission in the corresponding cell.

FIG. 8 is a block diagram illustrating a configuration of a UE according to an exemplary embodiment of the present invention.

Referring to FIG. 8, the UE includes a transceiver 805, a PH calculator 815, a controller 810, a multiplexer/demultiplexer 820, a control message processor 835, and various higher layer devices 825 and 830.

The transceiver 805 receives data and control signals on the downlink carriers and transmits data and control signals on the uplink carriers. In a case where a plurality of carriers is aggregated, the transceiver 805 can transmit/receive the data and control signals over a plurality of carriers.

The controller 810 controls the multiplexer/demultiplexer 820 to generate MAC PDUs according to the control signal received by means of the transceiver 805, e.g., the scheduling information in the uplink grant. The controller detects the PHR trigger. If a PHR trigger is detected, the controller 810 controls the PH calculator 815 to calculate the PH. Whether PHR is triggered can be determined by checking the PHR parameter provided by the control message processor 835. In a case where the PHs of multiple uplink carriers are configured into a PHR, the controller 810 controls the multiplexer/demultiplexer 820 to insert into the MAC PDU an indicator indicating whether the PH for each carrier is derived from a real P_CMAX or a virtual P_CMAX. The controller 810 generates the PHR with the PHs provided by the PH calculator 815 and sends the PHR to the multiplexer/demultiplexer 820. The PH calculator 815 calculates PH according to the control signal from the controller 810 and sends the PH to the controller 810. In a case where a plurality of carriers is aggregated, the PH calculator 815 can calculate PHs for the respective carriers, and especially the PH for the carrier having the PUSCH transmission being calculated using a virtual P_CMAX.

The multiplexer/demultiplexer 820 multiplexes the data from the higher layer devices 825 and 830 and/or control message processor 835 and demultiplexes the data received by the transceiver 805 to the higher layer devices 825 and 830 and/or the control message processor 835.

The control message processor 835 processes the control message transmitted by the network and performs a corresponding action. The control message processor 835 forwards the PHR parameter carried in the control message to the controller 810 or the information on the newly activated carriers to the transceiver 805 to set the carriers. The higher layer devices 825 and 830 can be implemented for the respective services so as to deliver the data generated by the user service such as File Transfer Protocol (FTP) and VoIP to the multiplexer/demultiplexer 820 or process and deliver the data from the multiplexer/demultiplexer 820 to the service applications of the higher layer.

Although not depicted, the base station apparatus of an exemplary embodiment of the present invention can include a transceiver, a controller, and a scheduler. The transceiver receives the extended PHR transmitted by the UE. The controller analyzes the extended PHR to determine PH per serving cell. The scheduler allocates uplink resources according to the PH per serving cell.

As described above, the PHR method and apparatus of exemplary embodiments of the present invention are capable of reporting PHs for multiple carriers efficiently in the mobile communication supporting carrier aggregation. The power headroom report method and apparatus of the present invention is capable of improving PH reporting efficiency in the mobile communication system supporting carrier aggregation.

While the invention has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A method for obtaining, by a user equipment (ue), power headroom information in a communication system, the method comprising:

acquiring receiving, from a base station, a secondary cell configuration message including first information for on a path loss change and second information on a path loss reference, wherein the first information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (SCell) on the path loss change indicates a threshold for triggering a power headroom report (PHR) and the second information on the path loss reference indicates one reference cell among a primary cell and the secondary cell;

triggering a power headroom report (PHR) if the PHR for activated cells in a case that both a prohibitPHR-Timer expires and a path loss is changed more than a the threshold for at least one activated cell which is used as the path loss reference cell among the activated cells; and

obtaining calculating power headroom information for each activated cell with a configured uplink, if extended PHR is used and in a case that an uplink resource is allocated for new transmission; and

transmitting the power headroom information for each activated cell with the configured uplink and an indicator for each activated cell with the configured uplink,

wherein the indicator indicates whether the power headroom information is based on a real physical uplink channel transmission or a physical uplink channel reference format,

wherein, in a case that the power headroom information is based on a real transmission of a physical uplink channel, the power headroom information is calculated based on a parameter related to a number of resource blocks and a parameter derived from modulation and coding scheme (MCS), and

wherein, in a case that the power headroom information is based on the physical uplink channel reference format, the power headroom information is calculated based on a maximum uplink transmission power, which is equal to one of a maximum allowed ue output power (P_EMAX) or a nominal ue power (P_powerclass), with the parameter related to the number of resource blocks being set to 0 and the parameter derived from the MCS being set to 0.

2. The method of claim 1, wherein the downlink of the secondary cell corresponding to an uplink is indicated by adding the SCell.

3. The method of claim 1, wherein the power headroom information for each activated cell is multiplexed with a higher layer data.

4. The method of claim 1, further comprising:

generating a media access control (MAC) protocol data unit (PDU) including wherein the power headroom information for each activated cell and an indicator for maximum transmit power information with the configured uplink is multiplexed with higher layer data.

5. The method of claim 4 1, wherein if in a case that the indicator is 0 the indicator indicates the first type maximum transmit power information real physical uplink channel transmission, and

wherein if in a case that the indicator is 1 the indicator indicates the second type maximum transmit power information physical uplink channel reference format.

6. A user equipment (ue) for obtaining power headroom information in a communication system, the ue comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to:

acquire receive, from a base station, a secondary cell configuration message including first information for on a path loss change and second information on a path loss reference, wherein the first information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (SCell) on the path loss change indicates a threshold for triggering a power headroom report (PHR) and the second information on the path loss reference indicates one reference cell among a primary cell and the secondary cell,

trigger a power headroom report (PHR) if the PHR for activated cells in a case that both a prohibitPHR-Timer expires and a path loss is changed more than a the threshold for at least one activated cell which is used as the path loss reference cell among the activated cells, and

obtain calculate power headroom information for each activated cell with a configured uplink, if extended PHR is used in a case that an uplink resource is allocated for new transmission, and an uplink resource is allocated for new transmission

transmit the power headroom information for each activated cell with the configured uplink and an indicator for each activated cell with the configured uplink,

wherein the indicator indicates whether the power headroom information is based on a real physical uplink channel transmission or a physical uplink channel reference format, and

wherein, in a case that the power headroom information is based on a real transmission of a physical uplink channel, the controller is further configured to calculate the power headroom information based on a parameter related to a number of resource blocks and a parameter derived from modulation and coding scheme (MCS), and

wherein, in a case that the power headroom information is based on the physical uplink channel reference format, the controller is further configured to calculate the power headroom information based on a maximum uplink transmission power, which is equal to one of a maximum allowed ue output power (P_EMAX) or a nominal ue power (P_powerclass), with the parameter related to a number of resource blocks being set to 0 and a parameter derived from the MCS being set to 0.

7. The ue of claim 6, wherein the downlink of the secondary cell corresponding to an uplink is indicated by adding the SCell.

8. The ue of claim 6, wherein the power headroom information for each activated cell is multiplexed with a higher layer data.

9. The ue of claim 6, wherein the controller is further configured to generate a media access control (MAC) protocol data unit (PDU) including the power headroom information for each activated cell and an indicator for maximum transmit power information with the configured uplink is multiplexed with higher layer data.

10. The ue of claim 9 6, wherein if the indicator is 0 the indicator indicates the first type maximum transmit power information real physical uplink channel transmission, and

wherein if the indicator is 1 the indicator indicates the second type maximum transmit power information physical uplink channel reference format.

11. A method for receiving power headroom information by a base station in a communication system, the method comprising:

transmitting, to a user equipment (ue), a secondary cell configuration message including first information for a path loss reference to a user equipment (ue), wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (SCell) on a path loss change and second information on a path loss reference, wherein the first information on the path loss change indicates a threshold for triggering a power headroom report (PHR) and the second information on the path loss reference indicates one reference cell among a primary cell and the secondary cell; and

receiving a the power headroom information for each activated cell from the terminal with a configured uplink and an indicator for each activated cell with the configured uplink in a case that an uplink resource is allocated for new transmission,

wherein a power headroom report (PHR) the PHR for the power headroom information is triggered if in a case that both a prohibitPHR-Timer expires and a path loss is changed more than a the threshold for at least one activated cell which is used as the path loss reference cell among activated cells,

wherein the indicator indicates whether power headroom information is based on a real physical uplink channel transmission or a physical uplink channel reference format, and

wherein, in a case that the power headroom information is based on a real transmission of a physical uplink channel, the power headroom information is calculated based on a parameter related to a number of resource blocks and a parameter derived from modulation and coding scheme (MCS), and

wherein, in a case that the power headroom information is based on the physical uplink channel reference format, the power headroom information is calculated based on a maximum uplink transmission power, which is equal to one of a maximum allowed ue output power (P_EMAX) or a nominal ue power (P_powerclass), with the parameter related to the number of resource blocks being set to 0 and the parameter derived from the MCS being set to 0.

12. The method of claim 11, wherein the downlink of the secondary cell corresponding to an uplink is indicated by adding the SCell.

13. The method of claim 11, wherein the power headroom information for each activated cell is multiplexed with a higher layer data.

14. The method of claim 11, further comprising:

receiving a media access control (MAC) protocol data unit (PDU) including wherein the power headroom information for each activated cell and an indicator for maximum transmit power information with the configured uplink is multiplexed with higher layer data.

15. The method of claim 14 11, wherein if in a case that the the indicator is 0 the indicator indicates the first type maximum transmit power information real physical uplink channel transmission, and

wherein if in a case that the indicator is 1 the indicator indicates the second type maximum transmit power information physical uplink channel reference format.

16. A base station for receiving power headroom information in a communication system, the base station comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to:

transmit, to a user equipment (ue), a secondary cell configuration message including first information for a path loss reference to a user equipment (ue), wherein the information for the path loss reference indicates whether the ue applies as the path loss reference either a downlink of a primary cell or a downlink of a secondary cell (SCell) on a path loss change and second information on a path loss reference, wherein the first information on the path loss change indicates a threshold for triggering a power headroom report (PHR) and the second information on the path loss reference indicates one reference cell among a primary cell and the secondary cell, and

receive a the power headroom information for each activated cell from the terminal with a configured uplink and an indicator for each activated cell with the configured uplink in a case that an uplink resource is allocated for new transmission,

wherein a power headroom report (PHR) the PHR for the power headroom information is triggered if in a case that both a prohibitPHR-Timer expires and a path loss is changed more than a the threshold for at least one activated cell which is used as the path loss reference cell among activated cells,

wherein the indicator indicates whether power headroom information is based on a real physical uplink channel transmission or a physical uplink channel reference format,

wherein, in a case that the power headroom information is based on a real transmission of a physical uplink channel, the controller is further configured to calculate the power headroom information based on a parameter related to a number of resource blocks and a parameter derived from modulation and coding scheme (MCS), and

wherein, in a case that the power headroom information is based on the physical uplink channel reference format, the controller is further configured to calculate the power headroom information based on a maximum uplink transmission power, which is equal to one of a maximum allowed ue output power (P_EMAX) or a nominal ue power (P_powerclass), with the parameter related to a number of resource blocks being set to 0 and a parameter derived from the MCS being set to 0.

17. The base station of claim 16, wherein the downlink of the secondary cell corresponding to an uplink is indicated by adding the SCell.

18. The base station of claim 16, wherein the power headroom information for each activated cell is multiplexed with a higher layer data.

19. The base station of claim 16, wherein the controller is further configured to receive a media access control (MAC) protocol data unit (PDU) including the power headroom information for each activated cell and an indicator for maximum transmit power information with the configured uplink is multiplexed with higher layer data.

20. The base station of claim 19 16, wherein if the indicator is 0 the indicator indicates the first type maximum transmit power information real physical uplink channel transmission, and

wherein if the indicator is 1 the indicator indicates the second type maximum transmit power information physical uplink channel reference format.