PATENT DOCUMENT

Abstract:
A user equipment includes: a processor circuit coupled with a transmitter, the processor circuit configured to, drop a Sounding Reference Signal (SRS) transmission when a total transmission power exceeds maximum output power of the user equipment and the user equipment needs to transmit a Physical Random Access Channel (PRACH) signal in a secondary serving cell in parallel with the SRS transmission in a same orthogonal frequency division multiplexing symbol of a different serving cell; and adjust transmission power of a physical uplink channel signal until an adjusted total transmission power is less than or equal to the maximum output power of the user equipment when the user equipment needs to transmit a PRACH signal in a secondary serving cell and transmit a physical uplink channel signal in other serving cell(s) within a symbol.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This is a continuation of U.S. application Ser. No. 14/162,034, filed Jan. 23, 2014, which is a continuation of International Application No. PCT/CN2011/077789, filed on Jul. 29, 2011, now pending, the contents of which are herein wholly incorporated by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to the field of communications, and in particular to a power control method and terminal equipment in case of power of a terminal being limited. 
       BACKGROUND ART 
       [0003]    In a long-term evolution (LTE) system, power control methods when terminal equipment transmits a physical uplink share channel (PUSCH), a physical uplink control channel (PUCCH), an uplink sounding reference signal (SRS) and a physical random access channel (PRACH) are defined (3GPP TS 36.213 v 8.6.0), wherein, 
         [0004]    a formula of power control of the PUSCH is: 
         [0000]        P   PUSCH ( i )=min{ P   MAX ,10 log 10 ( M   PUSCH ( i ))+ P   O   _   PUSCH ( j )+α( j )· PL+Δ   TF ( i )+ f ( i )} [dBm]  (1);
 
         [0005]    a formula of power control of the PUCCH is: 
         [0000]        P   PUCCH ( i )=min{ P   MAX   ,P   0   _   PUCCH   +PL+h ( n   CQI   ,n   HARQ )+Δ F   _   PUCCH ( F )+ g ( i )} [dBm]  (2);
 
         [0006]    a formula of power control of the SRS is: 
         [0000]        P   SRS ( i )=min{ P   MAX   ,P   SRS   _   OFFSET +10 log 10 ( M   SRS )+ P   O   _   PUSCH ( j )+α· PL+f ( i )} [dBm]  (3);
 
         [0007]    a formula of power control of the PRACH is: 
         [0000]        P   PRACH =min{ P   CMAX,c ( i ),PREAMBLE_RECEIVED_TARGET_POWER+ PL   c } [dBm]  (4).
 
         [0008]    In the LTE system, the same terminal equipment does not transmit a PUSCH, a PUCCH and a PRACH in the same subframe at the same time. Meanwhile, the same terminal equipment does not transmit an SRS and a PUSCH, an SRS and a PUCCH, and an SRS and a PRACH, in the same orthogonal frequency division multiplexing (OFDM) symbol at the same time. And on the other hand, it can be seen from the formulae of power control of the PUSCH, PUCCH, PRACH and SRS that if the transmission power of the uplink signals exceeds the configured maximum output power (PCMAX) of the terminal equipment, that is, overflow of the output power of the terminal equipment occurs, the transmission power of the terminal equipment used in transmitting the uplink signals will be equal to the configured maximum output power (PCMAX) of the terminal equipment. 
         [0009]    In Rel-10 of an LTE-Advanced (LTE-A) system, a carrier aggregation technology is used, and transmission power of uplink signals is independently controlled in each serving cell, with the power control methods being as follows: 
         [0010]    power control of a PUSCH: 
         [0011]    when only PUSCHs are transmitted in a serving cell c, the transmission power of the PUSCHs of the terminal equipment in an i-th subframe in the serving cell c is: 
         [0000]    
       
         
           
             
               
                 
                   
                     
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         [0012]    when PUSCHs and PUCCHs are transmitted in the serving cell c, the transmission power of the PUSCHs of the terminal equipment in the i-th subframe in the serving cell c is: 
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         [0013]    power control of a PUCCH: 
         [0014]    when PUCCHs are transmitted in the serving cell c, the transmission power of the PUCCHs of the terminal equipment in the i-th subframe in the serving cell c is: 
         [0000]    
       
         
           
             
               
                 
                   
                     
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         [0015]    power control of an SRS: 
         [0016]    when SRSs are transmitted in the serving cell c, the transmission power of the SRSs of the terminal equipment in the i-th subframe in the serving cell c is: 
         [0000]        P   SRS,c ( i )=min{ P   CMAX,c ( i ), P   SRS   _   OFFSET,c ( m )+10 log 10 ( M   SRS,c )+ P   O   _   PUSCH,c ( j )+α c ( j )· PL   c   +f   c ( i )} [dBm]  (8);
 
         [0017]    The method for controlling transmission power of a PRACH is the same as that of the LTE system, which are omitted herein. 
         [0018]    As a carrier aggregation technology is used, when the terminal equipment is configured with multiple serving cells, there will appear in the same subframe, and multiple PUSCHs are transmitted at the same time (as shown in  FIG. 1( a ) ), or PUSCHs and PUCCHs are transmitted at the same time (as shown in  FIG. 1( b ) ), in different serving cells. And on the other hand, as the capability of the terminal equipment is enhanced, the terminal equipment is able to transmit PUSCHs and PUCCHs in the same subframe in a primary serving cell at the same time (as shown in  FIG. 1( c ) ). 
         [0019]    If the above case occurs, that is, the terminal equipment needs to transmit multiple PUSCHs, or the terminal equipment needs to transmit PUSCHs and PUCCHs, in the same subframe at the same time, a case will occur where the sum of transmission power of multiple PUSCHs is greater than the configured maximum output power of the terminal equipment, or the sum of transmission power of the PUSCHs and PUCCHs is greater than the configured maximum output power of the terminal equipment. In order to direct allocation of the transmission power of the terminal equipment in such a case, a power control method in case of transmission power of terminal equipment being limited is defined in standardization of the LTE-A system. In which, when multiple PUSCHs with no uplink control information (UCI) only need to be transmitted at the same time, the terminal equipment calculates first the transmission power needed by PUSCHs in each serving cell according to formula (5); and if the total transmission power obtained at this moment exceeds the maximum output power of the terminal equipment, the terminal equipment decreases the transmission power of each PUSCH by equivalent share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; 
         [0020]    when PUSCHs with no UCI and PUCCHs need to be transmitted at the same time, the terminal equipment calculates first the transmission power needed by the PUSCHs in a serving cell where only PUSCHs are transmitted according to formula (5), and calculates the transmission power needed by the PUSCHs and the PUCCHs in a serving cell where PUSCHs and PUCCHs are transmitted at the same time according to formulae (6) and (7); and if the total transmission power obtained at this moment exceeds the maximum output power of the terminal equipment, the terminal equipment first ensures that the transmission power of the PUCCHs is satisfied, and then decreases the transmission power in each PUSCH with no UCI by equivalent share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; 
         [0021]    when PUSCHs with no UCI and PUSCHs with UCI need to be transmitted at the same time, the terminal equipment calculates first the transmission power needed by the PUSCHs in each serving cell according to formula (5); and if the total transmission power obtained at this moment exceeds the maximum output power of the terminal equipment, the terminal equipment first ensures that the transmission power of the PUSCHs with UCI is satisfied, and then decreases the transmission power in each PUSCH with no UCI by equivalent share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; 
         [0022]    when PUCCHs, PUSCHs with no UCI and PUSCHs with UCI need to be transmitted at the same time, the terminal equipment calculates first the transmission power needed by the PUSCHs in a serving cell where only PUSCHs are transmitted according to formula (5), and calculates the transmission power needed by the PUSCHs and the PUCCHs in a serving cell where PUSCHs and PUCCHs are transmitted at the same time according to formulae (6) and (7); and if the total transmission power obtained at this moment exceeds the maximum output power of the terminal equipment, the terminal equipment first ensures that the transmission power of the PUCCHs is satisfied and secondly ensures that the transmission power of the PUSCHs with UCI is satisfied, and then decreases the transmission power in each PUSCH with no UCI by equivalent share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0023]    In Rel-10 of the LTE-A system, when a terminal is configured with multiple serving cells, the terminal equipment uses the same uplink time advance value in transmitting uplink signals in all the serving cells, so as to ensure uplink synchronization. An initial value of the time advance is obtained by performing random access in a primary serving cell. Hence, in Rel-10, a base station configures a PRACH channel for the terminal equipment only in the primary serving cell (PCell), and the terminal equipment transmits PRACH signals only in the PCell. And at the same time, when the terminal equipment needs to transmit PRACH signals in the PCell, the terminal equipment does not transmit other uplink signals, including a PUSCH, a PUCCH and an SRS, in the PCell or other secondary serving cells (SCells). 
         [0024]    In the implementation of the present invention, the inventors found that in Rel-11, as an uplink needs to support aggregation of carriers from different stations and an inter-band carrier aggregation technology, it cannot be ensured that all the SCells have uplink signal time advance value same as that of a PCell. In order to obtain time advance value in some SCells, the terminal equipment needs to perform random access in the SCells. Therefore, in Rel-11, the base station needs to configure PRACH channel in some SCells for the terminal equipment. And the terminal equipment also needs to transmit PRACH signals in the SCells. At this moment, besides the case occurring in Rel-10 where the terminal equipment needs to transmit multiple PUSCHs in the same subframe at the same time or the terminal equipment needs to transmit PUSCHs and PUCCHs in the same subframe at the same time, the terminal equipment may need to transmit PUSCHs and PRACHs at the same time, transmit PUCCHs and PRACHs at the same time, and transmit SRSs and PRACHs at the same time. Therefore, the occurrence of the following three scenarios will also lead to occurrence of a case where the sum of the transmission power of the terminal equipment is greater than the configured maximum output power of the terminal equipment: 
         [0025]    scenario  1  (as shown in  FIG. 2 ): the sum of the transmission power of the terminal equipment in transmitting PUXCHs (PUXCH refers to a PUSCH or a PUCCH) and PRACHs respectively in a PCell and a SCell at the same time is greater than the configured maximum output power of the terminal equipment; 
         [0026]    scenario  2  (as shown in  FIG. 3 ): the sum of the transmission power of the terminal equipment in transmitting SRSs and PRACHs respectively at the same time in a PCell and a SCell is greater than the configured maximum output power of the terminal equipment; and 
         [0027]    scenario  3  (as shown in  FIG. 4 ): both of the sum of the transmission power of the terminal equipment in transmitting PUXCHs and PRACHs and the sum of the transmission power of the terminal equipment in transmitting SRSs and PRACHs respectively in a PCell and a SCell at the same time are greater than the configured maximum output power of the terminal equipment. 
         [0028]    It can be seen that when the sum of the transmission power of the terminal equipment in transmitting PUSCHs and PRACHs in the same subframe at the same time is greater than the configured maximum output power of the terminal equipment, or the sum of the transmission power of the terminal equipment in transmitting PUCCHs and PRACHs in the same subframe at the same time is greater than the configured maximum output power of the terminal equipment, or the sum of the transmission power of the terminal equipment in transmitting SRSs and PRACHs in the same OFDM symbol at the same time is greater than the configured maximum output power of the terminal equipment, how to control the power in uplink transmission of signals by the terminal equipment is an urgent problem needing to be solved at the present. 
         [0029]    It should be noted that the above description of the background art is merely provided for clear and complete explanation of the present invention and for easy understanding by those skilled in the art. And it should not be understood that the above technical solution is known to those skilled in the art as it is described in the background art of the present invention. 
       SUMMARY OF THE INVENTION 
       [0030]    An object of the embodiments of the present invention is to provide a power control method and terminal equipment in case of power of a terminal being limited, so as to solve a problem that the sum of the transmission power of the terminal equipment in transmitting SRSs and PRACHs in the same OFDM symbol at the same time is greater than the configured maximum output power of the terminal equipment, or to solve a problem that the sum of the transmission power of the terminal equipment in transmitting PRACHs and other physical uplink channel signals in the same subframe at the same time is greater than the configured maximum output power of the terminal equipment. 
         [0031]    According to one aspect of the embodiments of the present invention, there is provided a power control method, including: dropping, by terminal equipment, an SRS signal in other serving cell(s) or puncturing symbols of a PRACH signal in a secondary serving cell within the same OFDM symbol as the SRS signal in the other serving cell(s), when the terminal equipment needs to transmit the PRACH signal in the secondary serving cell and transmit the uplink SRS signal in the other serving cell(s) within the same OFDM symbol. 
         [0032]    Based on this method, when the terminal equipment needs to transmit the PRACH signal in the secondary serving cell and transmit a physical uplink channel signal in the other serving cell(s) within the same subframe, if total transmission power of the terminal equipment is greater than maximum output power of the terminal equipment, the terminal equipment adjusts transmission power of the PRACH signal and/or the physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0033]    According to another aspect of the embodiments of the present invention, there is provided a power control method, including: adjusting, by terminal equipment, transmission power of a PRACH signal and a SRS signal according to the priority orders of the PRACH signal and the SRS signal if total transmission power of the terminal equipment is greater than maximum output power of the terminal equipment, when the terminal equipment needs to transmit the PRACH signal in a secondary serving cell and transmit the uplink SRS signal in other serving cell(s) within the same OFDM symbol. 
         [0034]    Based on this method, when the terminal equipment needs to transmit the PRACH signal in the secondary serving cell and transmit a physical uplink channel signal in the other serving cell(s) within the same subframe, if the total transmission power of the terminal equipment is greater than the maximum output power of the terminal equipment, the terminal equipment adjusts the transmission power of the PRACH signal or adjusts the transmission power of the PRACH signal and the physical uplink channel signal, according to a predefined priority order of the PRACH signal and the physical uplink channel signal, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0035]    According to still another aspect of the embodiments of the present invention, there is provided terminal equipment, including: 
         [0036]    a first determining unit configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit an uplink SRS signal in other serving cell(s) within the same OFDM symbol; and 
         [0037]    a first processing unit configured to drop the SRS signal in the other serving cell(s) or puncture symbols of the PRACH signal in the secondary serving cell within the same OFDM symbol as the SRS signal in the other serving cell(s) if the determination result of the first determining unit is positive. 
         [0038]    Based on the terminal equipment, the terminal equipment further includes: 
         [0039]    a second determining unit configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit a physical uplink channel signal in other serving cell(s) within the same subframe; and 
         [0040]    a second processing unit configured to adjust transmission power of the PRACH signal and/or the physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal when total transmission power is greater than maximum output power when it is determined positive by the second determining unit, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0041]    According to still another aspect of the embodiments of the present invention, there is provided terminal equipment, including: 
         [0042]    a first determining unit configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit an uplink SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0043]    a first judging unit configured to judge whether total transmission power is greater than maximum output power of the terminal equipment when it is determined positive by the first determining unit; and 
         [0044]    a first processing unit configured to adjust the transmission power of the PRACH signal and the SRS signal according to the priority orders of the PRACH signal and the SRS signal when the result of judgment of the first judging unit is positive. 
         [0045]    Based on the terminal equipment, the terminal equipment further includes: 
         [0046]    a second determining unit configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit a physical uplink channel signal in other serving cell(s) within the same subframe; 
         [0047]    a second judging unit configured to judge whether the total transmission power is greater than the maximum output power of the terminal equipment when it is determined positive by the second determining unit; and 
         [0048]    a second processing unit configured to adjust the transmission power of the PRACH signal or adjust the transmission power of the PRACH signal and the physical uplink channel signal according to predefined priority orders of the PRACH signal and the physical uplink channel signal when it is determined positive by the second judging unit, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0049]    The advantages of the embodiments of the present invention reside in that the problem that the total transmission power is greater than the configured maximum output power resulted from a scenario newly occurred in Rel-11 such as the terminal equipment transmits PRACHs and SRSs in the same OFMD symbol at the same time is solved, and at the same time, the problem that the total transmission power is greater than the configured maximum output power resulted from transmitting PRACHs and physical uplink channel signals by the terminal equipment in the same subframe at the same time is solved. 
         [0050]    With reference to the following description and drawings, the particular embodiments of the present invention are disclosed in detail, and the principle of the present invention and the manners of use are indicated. It should be understood that the scope of the embodiments of the present invention is not limited thereto. The embodiments of the present invention contain many alternations, modifications and equivalents within the spirits and scope of the terms of the appended claims. 
         [0051]    Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments. 
         [0052]    It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0053]    Many aspects of the invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. To facilitate illustrating and describing some parts of the invention, corresponding portions of the drawings may be exaggerated or reduced in size, e.g., made larger in relation to other parts than in an exemplary device actually made according to the invention. Elements and features depicted in one drawing or embodiment of the invention may be combined with elements and features depicted in one or more additional drawings or embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views and may be used to designate like or similar parts in more than one embodiment. In the drawings: 
           [0054]      FIG. 1A  is a schematic diagram of transmitting multiple PUSCHs by terminal equipment in different cells within the same subframe at the same time in Rel-10 of an LTE-A system; 
           [0055]      FIG. 1B  is a schematic diagram of transmitting PUSCHs and PUCCHs by terminal equipment in different cells within the same subframe at the same time in Rel-10 of an LTE-A system; 
           [0056]      FIG. 1C  is a schematic diagram of transmitting PUSCHs and PUCCHs by terminal equipment in a PCell within the same subframe at the same time in Rel-10 of an LTE-A system; 
           [0057]      FIGS. 2A, 2B &amp; 2C  are schematic diagrams of transmitting PUXCHs and PRACHs by terminal equipment respectively in different cells at the same time in Rel-11 of an LTE-A system; 
           [0058]      FIGS. 3A &amp; 3B  are schematic diagrams of transmitting SRSs and PRACHs by terminal equipment respectively in different cells at the same time in Rel-11 of an LTE-A system; 
           [0059]      FIGS. 4A &amp; 4B  are schematic diagrams of transmitting PUXCHs, SRSs and PRACHs by terminal equipment in different cells at the same time in Rel-11 of an LTE-A system; 
           [0060]      FIG. 5  is a flowchart of a power control method provided by an embodiment of the present invention; 
           [0061]      FIG. 6  is a flowchart of a power control method based on the embodiment of  FIG. 5  and provided by another embodiment of the present invention; 
           [0062]      FIGS. 7A, 7B &amp; 7C  are flowcharts of step  602  in the embodiment of  FIG. 6 ; 
           [0063]      FIG. 8  is a flowchart of a power control method provided by still another embodiment of the present invention; 
           [0064]      FIG. 9  is a flowchart of a power control method based on the embodiment of  FIG. 8  and provided by further still another embodiment of the present invention; 
           [0065]      FIGS. 10A, 10B &amp; 10C  are flowcharts of step  902  in the embodiment of  FIG. 9 ; 
           [0066]      FIG. 11  is a schematic diagram of the structure of terminal equipment provided by an embodiment of the present invention; and 
           [0067]      FIG. 12  is a schematic diagram of the structure of terminal equipment provided by another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0068]    Foregoing and other features of the embodiments of the present invention will become apparent with reference to the drawings and the following description. These embodiments are illustrative only and are not intended to limit the present invention. 
         [0069]    An embodiment of the present invention provides a power control method for terminal equipment, as described in Embodiment 1 below. 
       Embodiment 1 
       [0070]      FIG. 5  is a flowchart of the power control method provided by an embodiment of the present invention. Referring to  FIG. 5 , the method includes: 
         [0071]    step  501 : determining whether terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit an SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0072]    wherein, the other serving cell(s) may be PCells or other SCells than said secondary serving cell; 
         [0073]    wherein, the SRS signal may be a periodic SRS signal, and may also be an aperiodic SRS signal; 
         [0074]    step  502 : transmitting only the PRACH signal or only the SRS signal by the terminal equipment within the OFDM symbol when it is determined that the terminal equipment needs to transmit a PRACH signal in an SCell and transmit an SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0075]    wherein, if the terminal equipment transmits only the PRACH signal within the OFDM symbol, the terminal equipment may drop an SRS signal in the other serving cell(s), that is, transmitting only the PRACH signal when a PRACH signal and SRS signals in different serving cells need to be transmitted within the same OFDM symbol at the same time is ensured; 
         [0076]    wherein, if the terminal equipment transmits only the SRS signal within the OFDM symbol, the terminal equipment punctures symbols of the PRACH signal in the SCell in the same OFDM symbol as that of the SRS signal in the other serving cell(s), that is, transmitting only the SRS signal when a PRACH signal and an SRS signal in different serving cells need to be transmitted within the same OFDM symbol at the same time. 
         [0077]    With the above method, when it needs to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, transmitting only the SRS signals or transmitting only the PRACH signals is selected, thereby lowering the transmission power of the terminal equipment, and solving the problem that the sum of the transmission power of the terminal equipment is greater than the configured maximum output power of the terminal equipment that may be resulted from transmitting SRS signals and PRACH signals in the same OFDM symbol at the same time. 
         [0078]    An embodiment of the present invention further provides a power control method for terminal equipment, as described in Embodiment 2 below. This method is a power control process of the terminal equipment on the basis of the method of Embodiment 1 when it is determined that the terminal equipment needs to transmit PRACH signals in an SCell and transmit physical uplink channels signals in other serving cell(s) within the same subframe. Wherein, contents identical to those in Embodiment 1 are omitted herein. 
       Embodiment 2 
       [0079]      FIG. 6  is a flowchart of the power control method provided by an embodiment of the present invention. As shown in  FIG. 6 , the method includes: 
         [0080]    step  601 : transmitting only a PRACH signal or only an SRS signal by terminal equipment within an OFDM symbol when the terminal equipment needs to transmit the PRACH signal in an SCell and transmit the SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0081]    wherein, the processing in step  601  is identical to the processing in the method of Embodiment 1 and is omitted herein; 
         [0082]    step  602 : adjusting, by the terminal equipment, transmission power of a PRACH signal and/or a physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal if total transmission power of the terminal equipment (i.e. the sum of the transmission power for transmitting the PRACH and the transmission power for transmitting the physical uplink channel signal) obtained through calculation is greater than maximum output power of the terminal equipment, when the terminal equipment needs to transmit the PRACH signal in an SCell and transmit the physical uplink channel signal in other serving cell(s) within the same subframe, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0083]    wherein, the physical uplink channel signal transmitted in the other serving cell(s) may be any combination of the following signals: a PUCCH signal, a PUSCH signal with UCI, and a PUSCH with no UCI; and wherein, the other serving cell(s) are different according to the types of the physical uplink channel signals; for example, for a PUSCH signal, the other serving cell(s) here may be PCell, and may also be other SCell(s) than said SCell; and for a PUCCH signal, the other serving cell(s) here may be PCell; 
         [0084]    wherein, as the types of the physical uplink channel signals transmitted in the other serving cell(s) are different, when it is determined in this embodiment that the total transmission power of the terminal equipment in transmitting the PRACH signal and the physical uplink channel signal is greater than the maximum output power of the terminal equipment, the terminal equipment adjusts the transmission power of the PRACH signal or the physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and wherein, the priority order of each signal may be predefined, which is defined in this embodiment as: the priority order of the PUSCH signal with no UCI is less than or equal to that of the PRACH signal, the priority order of the PRACH signal is less than that of the PUSCH signal with UCI, and the priority order of the PUSCH signal with UCI is less than that of the PUCCH signal. 
         [0085]    In this embodiment, as a signal of relatively lower priority order is relatively less important to the terminal equipment, the transmission power of the signal of relatively lower priority order is lowered in this embodiment in accordance with this rule, so as to ensure the transmission of a signal of relatively higher priority order. In the following description, the remaining transmission power refers to the maximum output power of the terminal equipment subtracted by the allocated transmission power. 
         [0086]    In an implementation, step  602  may be carried out by the method shown in  FIGS. 7 a -7 c   , and will be described below in detail with reference to  FIGS. 7 a   - 7   c.    
         [0087]    Referring to  FIGS. 7 a -7 c   , the method includes: 
         [0088]    step  701 : obtaining total transmission power by the terminal equipment by calculating the transmission power of the signals to be transmitted; 
         [0089]    step  702 : judging by the terminal equipment whether the total transmission power is greater than the maximum output power of the terminal equipment; and executing step  703  if yes; otherwise, terminating the process; 
         [0090]    step  703 : judging a type of physical uplink channel signals to be transmitted by the terminal equipment; executing step  704  if there is only one type, executing step  707  if there are two types, and executing step  713  if there are three types; 
         [0091]    refer to  FIG. 7 a    for the case where there is only one type of physical uplink channel signals to be transmitted at the same time; 
         [0092]    step  704 : judging by the terminal equipment whether the priority order of the PRACH signal is identical to that of the physical uplink channel signal to be transmitted; and executing step  705  if yes; otherwise, executing step  706 ; 
         [0093]    step  705 : lowering the transmission power of the PRACH signal and the physical uplink channel signal by the terminal equipment by an equal share, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0094]    step  706 : satisfying the transmission power of a signal of higher priority order and lowering the transmission power of a signal of lower priority order by the terminal equipment, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0095]    refer to  FIG. 7 b    for the case where there are two types of physical uplink channel signals to be transmitted at the same time; 
         [0096]    step  707 : satisfying the transmission power of a signal of highest priority order by the terminal equipment; 
         [0097]    step  708 : judging by the terminal equipment whether the priority orders of the remaining two signals are identical; and executing step  709  if yes; otherwise, executing step  710 ; 
         [0098]    step  709 : lowering the transmission power of the remaining two signals (i.e. the PRACH signal and the physical uplink channel signal) by the terminal equipment by an equal share, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0099]    step  710 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of secondary priority order; and executing step  711  if yes; otherwise, executing step  712 ; 
         [0100]    step  711 : satisfying the transmission power of a signal of secondary priority order and lowering the transmission power of a signal of lowest priority order by the terminal equipment, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0101]    step  712 : setting the transmission power of the signal of lowest priority order to be 0 and allocating the remaining transmission power to the signal of secondary priority order by the terminal equipment; 
         [0102]    refer to  FIG. 7 c    for the case where there are three types of physical uplink channel signals to be transmitted at the same time; 
         [0103]    step  713 : satisfying the transmission power of the signal of highest priority order by the terminal equipment; 
         [0104]    step  714 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of secondary priority order; and executing step  716  if yes; otherwise, executing step  715 ; 
         [0105]    step  715 : allocating the remaining transmission power to the signal of secondary priority order and setting the transmission power of the remaining signals to be 0 by the terminal equipment; 
         [0106]    step  716 : satisfying the transmission power of the signal of secondary priority order by the terminal equipment; 
         [0107]    step  717 : judging by the terminal equipment whether the priority orders of the remaining two signals are identical; and executing step  718  if yes; otherwise, executing step  719 ; 
         [0108]    step  718 : lowering the transmission power of the remaining two signals by the terminal equipment by an equal share, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0109]    step  719 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of relatively higher priority order in the remaining two signals; and executing step  720  if yes; otherwise, executing step  721 ; 
         [0110]    step  720 : satisfying the transmission power of the signal of relatively higher priority order in the remaining two signals and lowering the transmission power of the signal of lowest priority order by the terminal equipment, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and step  721 : allocating the remaining transmission power to the signal of relatively higher priority order in the remaining two signals and setting the transmission power of the signal of lowest priority order to be 0 by the terminal equipment. 
         [0111]    In this embodiment, as the types and priority orders of the physical uplink channel signals needing to be transmitted in the other serving cell(s) are different, the signals needing to be adjusted with respect to transmission power are also different. For the method of  FIG. 7 a   - FIG. 7 c    to be more clear, following description is given for different cases. 
         [0112]    For the case where there is only one type of physical uplink channel signals. 
         [0113]    If the physical uplink channel signals are PUSCH signals with no UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by each PUSCH and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal, the adjusting policy determined by the terminal equipment according to the predefined priority order is as follows: if the priority order of a PUSCH signal with no UCI is equal to the priority order of a PRACH signal, the terminal equipment lowers the transmission power of the PRACHs and all the PUSCHs with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; and if the priority order of a PUSCH signal with no UCI is less than the priority order of a PRACH signal, the terminal equipment first satisfies the transmission power of the PRACHs, that is, allocating the transmission power needed by the PRACHs to the PRACHs, and then lowers the transmission power of each PUSCH with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0114]    If the physical uplink channel signals are PUSCH signals with UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI, the terminal equipment first ensures satisfying the transmission power of the PUSCHs with UCI, that is, allocating the transmission power needed by the PUSCHs with UCI to the PUSCHs with UCI, and then lowers the transmission power of the PRACHs, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0115]    If the physical uplink channel signals are PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs and the transmission power needed by the PRACHs according to above formulae (7) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, that is, allocating the transmission power needed by the PUCCHs to the PUCCHs, and then lowers the transmission power of the PRACHs, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0116]    For the case where there are two types of physical uplink channel signals. 
         [0117]    If the physical uplink channel signals are PUSCH signals with no UCI and PUSCH signals with UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI and PUSCH signals with UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal and the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI, the terminal equipment first ensures satisfying the transmission power of the PUSCHs with UCI, that is, allocating the transmission power needed by the PUSCHs with UCI to the PUSCHs with UCI, and processes the remaining transmission power in different ways, as the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal, which are transmitted at the same time. For the case where the priority order of a PUSCH signal with no UCI is less than the priority order of a PRACH signal, the terminal equipment judges whether the remaining transmission power satisfies the transmission power needed by the PRACH signals; if yes, the terminal equipment satisfies the transmission power of the PRACH signals, and then lowers the transmission power of all the PUSCHs with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; and if no, the terminal equipment sets the transmission power of the PUSCH signals with no UCI to be 0, and allocates the remaining transmission power to the PRACH signals. For the case where the priority order of a PUSCH signal with no UCI is equal to the priority order of a PRACH signal, the terminal equipment lowers the transmission power of the PRACHs and all the PUSCHs with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0118]    If the physical uplink channel signals are PUSCH signals with no UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs, the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (6) and (7), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal and the priority order of a PRACH signal is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCH signals, that is, allocating the transmission power needed by the PUCCHs to the PUCCHs, and processes the remaining transmission power in different ways, as the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal, which are transmitted at the same time. For the case where the priority order of a PUSCH signal with no UCI is less than the priority order of a PRACH signal, the terminal equipment judges whether the remaining transmission power satisfies the transmission power needed by the PRACH signals; if yes, the terminal equipment satisfies the transmission power of the PRACH signals, and then lowers the transmission power of all the PUSCH signals with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; and if no, the terminal equipment sets the transmission power of the PUSCH signals with no UCI to be 0, and allocates the remaining transmission power to the PRACH signals. For the case where the priority order of a PUSCH signal with no UCI is equal to the priority order of a PRACH signal, the terminal equipment lowers the transmission power of the PRACHs and all the PUSCHs with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. 
         [0119]    If the physical uplink channel signals are PUSCH signals with UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs and the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (5) and (6), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI and the priority order of a PUSCH signal with UCI is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, that is, allocating the transmission power needed by the PUCCHs to the PUCCHs. For the remaining transmission power, the terminal equipment judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with UCI; if yes, the terminal equipment satisfies the transmission power of the PUSCH signals with UCI, and then allocates the remaining transmission power to the PRACHs; and if no, the terminal equipment sets the transmission power of the PRACHs to be 0, and allocates the remaining transmission power to the PUSCH signals with UCI. 
         [0120]    For the case where there are three types of physical uplink channel signals. 
         [0121]    If the physical uplink channel signals are PUSCH signals with no UCI, PUSCH signals with UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell, transmit PUSCH signals with UCI and PUSCH signals with no UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs, the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (5) and (6), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal, the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI and the priority order of a PUSCH signal with UCI is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, that is, allocating the transmission power needed by the PUCCHs to the PUCCHs. For the remaining transmission power, the terminal equipment judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with UCI; if the transmission power of the PUSCH signals with UCI can be satisfied, the terminal equipment satisfies the transmission power of the PUSCH signals with UCI. And the terminal equipment processes the remaining transmission power in different ways, as the priority order of a PUSCH signal with no UCI is less than or equal to the priority order of a PRACH signal, which are transmitted at the same time. For the case where the priority order of a PUSCH signal with no UCI is less than the priority order of a PRACH signal, the terminal equipment judges whether the remaining transmission power satisfies the transmission power needed by the PRACH signals; if yes, the terminal equipment satisfies the transmission power of the PRACH signals, and then lowers the transmission power of all the PUSCH signals with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured; and if no, the terminal equipment sets the transmission power of the PUSCH signals with no UCI to be 0, and allocates the remaining transmission power to the PRACH signals. For the case where the priority order of a PUSCH signal with no UCI is equal to the priority order of a PRACH signal, the terminal equipment lowers the transmission power of the PRACHs and all the PUSCHs with no UCI by an equal share, until that the total transmission power is less than or equal to the maximum output power of the terminal equipment is ensured. And if the transmission power of the PUSCH signals with UCI cannot be satisfied, the terminal equipment sets the transmission power of the PRACHs and all the PUSCHs with no UCI to be 0, and allocates the remaining transmission power to the PUSCH signals with UCI at the same time. 
         [0122]    With the power control method of this embodiment, when the terminal equipment needs to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, the transmission power of the terminal equipment is lowered by dropping the SRS signals and transmitting only the PRACH signals, or by puncturing the PRACH signals in the same OFDM symbol as the SRS signals and transmitting only the SRS signals, and the problem that the total transmission power is greater than the configured maximum output power resulted from transmitting SRS signals and PRACH signals by the terminal equipment in the same OFDM symbol at the same time is solved. Furthermore, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit physical uplink channel signals in other cell(s) within the same subframe, if the transmission power of the terminal equipment is greater than the maximum output power of the terminal equipment, the terminal equipment may determine a power control policy according to the priority orders of the PRACH signals and each physical uplink channel signal, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby providing a practical and feasible power control method for a scenario newly occurred in Rel-11 in which the power of the terminal equipment is limited. 
         [0123]    An embodiment of the present invention further provides a power control method, as described in Embodiment 3 below. Different from those in embodiments 1 and 2, in the method in Embodiment 3, in case that PRACH signals and SRS signals are transmitted in the same OFDM symbol at the same time, not one type of the signals are transmitted, but the two types of the signals are transmitted at the same time with the transmission power of one type of the signals of relatively lower priority order to be controlled according to a priority order policy, which shall be described below in detail. 
       Embodiment 3 
       [0124]      FIG. 8  is a flowchart of the power control method provided by an embodiment of the present invention. Referring to  FIG. 8 , the method includes: 
         [0125]    step  801 : determining whether terminal equipment needs to transmit a PRACH signal in an SCell and transmit an SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0126]    wherein, the other serving cell(s) may be PCell or other SCell(s) than said SCell; 
         [0127]    wherein, the SRS signal may be a periodic SRS signal, and may also be an aperiodic SRS signal; 
         [0128]    step  802 : adjusting transmission power of the PRACH signal and the SRS signal by the terminal equipment according to a predefined priority order of the PRACH signal and the SRS signal if total transmission power of the terminal equipment (i.e. the sum of the transmission power for transmitting PRACH signals and the transmission power for transmitting SRS signals) obtained through calculation is greater than maximum output power of the terminal equipment when it is determined that the terminal equipment needs to transmit the PRACH signal in the SCell and transmit the SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0129]    wherein, if the priority order of the PRACH signal predefined in this embodiment is less than that of the SRS signal, the terminal equipment first judges whether the maximum output power of the terminal equipment satisfies the transmission power for transmitting SRS; if yes, the terminal equipment satisfies the transmission power for transmitting SRS, and then allocates the remaining transmission power to the PRACH; and if no, the terminal equipment sets the transmission power of the PRACH to be 0, and allocates the transmission power (the maximum output power) to all the SRS signals by an equal share. 
         [0130]    With the above method, when it needs to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, the terminal equipment ensures the transmission of the signals of higher priory order, such as the transmission of the SRS signals, by controlling the transmission power of the signals, thereby solving the problem that the sum of the transmission power is greater than the maximum output power that may be resulted from transmitting SRS signals and PRACH signals by the terminal equipment in the same OFDM symbol at the same time. 
         [0131]    An embodiment of the present invention further provides a power control method for terminal equipment, as described in Embodiment 4 below. This method is a power control process of the terminal equipment on the basis of the method of Embodiment 3 when it is determined that the terminal equipment needs to transmit PRACH signals in an SCell and transmit physical uplink channels signals in other serving cell(s) within the same subframe. Wherein, contents identical to those in Embodiment 3 are omitted herein. 
       Embodiment 4 
       [0132]      FIG. 9  is a flowchart of the power control method provided by an embodiment of the present invention. Referring to  FIG. 9 , the method includes: 
         [0133]    step  901 : adjusting transmission power of a signal of relatively lower priority order by terminal equipment according to a predefined priority order of a PRACH signal and an SRS signal if total transmission power of the terminal equipment (i.e. the sum of the transmission power for transmitting PRACH signals and the transmission power for transmitting SRS signals) obtained through calculation is greater than maximum output power of the terminal equipment when the terminal equipment needs to transmit the PRACH signal in the SCell and transmit the uplink SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0134]    wherein, the processing in step  901  is identical to the processing in the method of Embodiment 3 and is omitted herein; 
         [0135]    step  902 : adjusting, by the terminal equipment, transmission power of the signal of relatively lower priority order according to a predefined priority order of a PRACH signal and a physical uplink channel signal if the total transmission power of the terminal equipment (i.e. the sum of the transmission power for transmitting the PRACH and the transmission power for transmitting the physical uplink channel signal) obtained through calculation is greater than the maximum output power of the terminal equipment, when the terminal equipment needs to transmit the PRACH signal in the SCell and transmit the physical uplink channel signal in other serving cell(s) within the same subframe, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0136]    wherein, the physical uplink channel signal transmitted in the other serving cell(s) may be any combination of the following signals: a PUCCH signal, a PUSCH signal with UCI, and a PUSCH signal with no UCI; and wherein, the other serving cell(s) are different according to the types of the physical uplink channel signals; for example, for a PUSCH signal, the other serving cell(s) here may be a PCell, and may also be other SCell(s) than said SCell; and for a PUCCH signal, the other serving cell(s) here may be a PCell; 
         [0137]    wherein, as the types of the physical uplink channel signals transmitted in the other serving cell(s) are different, when it is determined in this embodiment that the total transmission power of the terminal equipment in transmitting the PRACH signal and the physical uplink channel signal is greater than the maximum output power of the terminal equipment, the terminal equipment adjusts the transmission power of the signal of relatively lower priority order according to priority orders of the PRACH signal and the physical uplink channel signal, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and wherein, the priority order of each signal may be predefined, which is defined in this embodiment as: the priority order of the PRACH signal is less than that of the PUSCH signal with no UCI, the priority order of the PUSCH signal with no UCI is less than that of the PUSCH signal with UCI, and the priority order of PUSCH signal with UCI is less than that of the PUCCH signal. 
         [0138]    In this embodiment, as a signal of relatively lower priority order is relatively less important to the terminal equipment, the transmission power of the signal of relatively lower priority order is lowered in this embodiment in accordance with this rule, so as to ensure the transmission of a signal of relatively higher priority order. In the following description, the remaining transmission power refers to the maximum output power of the terminal equipment subtracted by the allocated transmission power. 
         [0139]    In this embodiment, as PRACHs and SRSs are transmitted in the same OFDM symbol, when PRACHs and physical uplink channel signals are transmitted in the same subframe, the processing of step  902  in Embodiment 4 is slightly different from that of step  602  in Embodiment 2. In which, step  902  may be carried out by the method shown in  FIGS. 10 a -10 c   , and will be described below in detail with reference to  FIGS. 10 a   - 10   c.    
         [0140]    Referring to  FIGS. 10 a -10 c   , the method includes: 
         [0141]    step  1001 : obtaining total transmission power by the terminal equipment by calculating the transmission power of the signals to be transmitted; 
         [0142]    step  1002 : judging by the terminal equipment whether the total transmission power is greater than the maximum output power of the terminal equipment; and executing step  1003  if yes; otherwise, terminating the process; 
         [0143]    step  1003 : judging the number of types of the transmitted physical uplink channel signals by the terminal equipment; executing step  1004  if there is only one type, executing step  1007  if there are two types, and executing step  1011  if there are three types; 
         [0144]    refer to  FIG. 10 a    for the case where there is only one type of physical uplink channel signals; 
         [0145]    step  1004 : judging by the terminal equipment whether the transmission power of the signal of higher priority order is satisfied; and executing step  1005  if yes; otherwise, executing step  1006 ; 
         [0146]    step  1005 : satisfying the transmission power of the signal of higher priority order and allocating the remaining transmission power to the signal of lower priority order by the terminal equipment; 
         [0147]    step  1006 : setting the transmission power of the signal of lower priority order to be 0 and allocating the remaining transmission power to the signal of higher priority order by the terminal equipment; 
         [0148]    refer to  FIG. 10 b    for the case where there are two types of physical uplink channel signals; 
         [0149]    step  1007 : satisfying the transmission power of a signal of highest priority order by the terminal equipment; 
         [0150]    step  1008 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of secondary priority order; and executing step  1009  if yes; otherwise, executing step  1010 ; 
         [0151]    step  1009 : satisfying the transmission power of the signal of secondary priority order and allocating the remaining transmission power to the signal of lowest priority order by the terminal equipment; 
         [0152]    step  1010 : setting the transmission power of the signal of lowest priority order to be 0 and allocating the remaining transmission power to the signal of secondary priority order by the terminal equipment; 
         [0153]    refer to  FIG. 10 c    for the case where there are three types of physical uplink channel signals; 
         [0154]    step  1011 : satisfying the transmission power of the signal of highest priority order by the terminal equipment; 
         [0155]    step  1012 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of secondary priority order; and executing step  1013  if yes; otherwise, executing step  1017 ; 
         [0156]    step  1013 : satisfying the transmission power of the signal of secondary priority order by the terminal equipment; 
         [0157]    step  1014 : judging by the terminal equipment whether the remaining transmission power satisfies a signal of a third priority order; and executing step  1015  if yes; otherwise, executing step  1016 ; 
         [0158]    step  1015 : satisfying the transmission power of the signal of a third priority order and allocating the remaining transmission power to the signal of lowest priority order; 
         [0159]    step  1016 : setting the transmission power of the signal of lowest priority order to be 0 and allocating the remaining transmission power to the signal of a third priority order by the terminal equipment; 
         [0160]    step  1017 : allocating the remaining transmission power to the signal of secondary priority order and setting the transmission power of the remaining signals to be 0 by the terminal equipment. 
         [0161]    In this embodiment, as the types and priority orders of the physical uplink channel signals needing to be transmitted in the other serving cell(s) are different, the signals needing to be adjusted with respect to transmission power are also different. For the method of  FIG. 10 a   - FIG. 10 c    to be more clear, following description is given for different cases. 
         [0162]    For the case where there is only one type of physical uplink channel signals. 
         [0163]    If the physical uplink channel signals are PUSCH signals with no UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by each PUSCH and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with no UCI, the terminal equipment first judges whether the transmission power of all the PUSCHs with no UCI is satisfied; if the result of judgment is yes, the terminal equipment satisfies the transmission power of all the PUSCHs with no UCI, and allocates the remaining transmission power to the PRACHs; and if the result of judgment is no, the terminal equipment sets the transmission power of the PRACHs to be 0, and allocates the remaining transmission power to each of the PUSCHs with no UCI by an equal share. 
         [0164]    If the physical uplink channel signals are PUSCH signals with UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI, the terminal equipment first ensures satisfying the transmission power of the PUSCHs with UCI, and then allocates the remaining transmission power to the PRACHs. 
         [0165]    If the physical uplink channel signals are PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs and the transmission power needed by the PRACHs according to above formulae (2) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, and then allocates the remaining transmission power to the PRACHs. 
         [0166]    For the case where there are two types of physical uplink channel signals. 
         [0167]    If the physical uplink channel signals are PUSCH signals with no UCI and PUSCH signals with UCI, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI and PUSCH signals with UCI in a PCell or other SCell(s) within the same subframe, the terminal equipment first calculates the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (5) and (4) respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with no UCI and the priority order of a PUSCH signal with no UCI is less than the priority order of a PUSCH signal with UCI, the terminal equipment first ensures satisfying the transmission power of the PUSCH signal with UCI, and then judges whether the remaining transmission power satisfies the transmission power of the PUSCH signal with no UCI; if yes, the terminal equipment satisfies the transmission power of the PUSCH signals with no UCI, and then allocates the remaining transmission power to the PRACHs; and if no, the terminal equipment sets the transmission power of the PRACHs to be 0, and allocates the remaining transmission power to all the PUSCHs with no UCI by an equal share. 
         [0168]    If the physical uplink channel signals are PUSCH signals with no UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with no UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs, the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (5) and (6), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with no UCI and the priority order of a PUSCH signal with no UCI is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, and then judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with no UCI; if yes, the terminal equipment satisfies the transmission power of the PUSCH signals with no UCI, and then allocates the remaining transmission power to the PRACHs; and if no, the terminal equipment sets the transmission power of the PRACHs to be 0, and allocates the remaining transmission power to all the PUSCHs with no UCI by an equal share. 
         [0169]    If the physical uplink channel signals are PUSCH signals with UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit PUSCH signals with UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs, the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (5) and (6), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with UCI and the priority order of a PUSCH signal with UCI is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCH signals, and then judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with UCI; if yes, the terminal equipment satisfies the transmission power of the PUSCH signals with UCI, and then allocates the remaining transmission power to the PRACHs; and if no, the terminal equipment sets the transmission power of the PRACHs to be 0, and allocates the remaining transmission power to the PUSCHs with UCI. 
         [0170]    For the case where there are three types of physical uplink channel signals. 
         [0171]    If the physical uplink channel signals are PUSCH signals with no UCI, PUSCH signals with UCI and PUCCH signals, that is, when the terminal equipment needs to transmit PRACH signals in an SCell, transmit PUSCH signals with UCI and PUSCH signals with no UCI in a PCell or other SCell(s) and transmit PUCCH signals in a PCell within the same subframe, the terminal equipment first calculates the transmission power needed by the PUCCHs, the transmission power needed by the PUSCHs and the transmission power needed by the PRACHs according to above formulae (4), (5) and (7), or (4), (5) and (6), respectively. If the total transmission power thus obtained exceeds the maximum output power of the terminal equipment, according to what is predefined in this embodiment that the priority order of a PRACH signal is less than the priority order of a PUSCH signal with no UCI, the priority order of a PUSCH signal with no UCI is less than the priority order of a PUSCH signal with UCI and the priority order of a PUSCH signal with UCI is less than the priority order of a PUCCH signal, the terminal equipment first ensures satisfying the transmission power of the PUCCHs, and then judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with UCI; if the transmission power of the PUSCH signals with UCI cannot be satisfied, the terminal equipment sets the transmission power of the PRACHs and the transmission power of all the PUSCHs with no UCI to be 0, and at the same time, allocates the remaining transmission power to the PUSCHs with UCI; if the transmission power of the PUSCH signal with UCI can be satisfied, the terminal equipment satisfies the transmission power of the PUSCH signals with UCI, and then judges whether the remaining transmission power satisfies the transmission power of the PUSCH signals with no UCI. If the transmission power of the PUSCH signals with no UCI can be satisfied, the terminal equipment satisfies the transmission power of the PUSCH signals with no UCI, and then allocates the remaining transmission power to the PRACHs; and if the transmission power of the PUSCH signals with no UCI cannot be satisfied, the terminal equipment sets the transmission power of the PRACHs to be 0, and at the same time, allocates the remaining transmission power to all the PUSCHs with no UCI. 
         [0172]    With the power control method of this embodiment, when the terminal equipment needs to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, if the total transmission power of the terminal equipment obtained through calculation is greater than the maximum output power of the terminal equipment, the terminal equipment adjusts the transmission power of a signal of relatively lower priority order, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby solving the problem that the total transmission power is greater than the configured maximum output power resulted from transmitting SRS signals and PRACH signals by the terminal equipment within the same OFDM symbol at the same time. Furthermore, when the terminal equipment needs to transmit PRACH signals in an SCell and transmit physical uplink channel signals in other cell(s) within the same subframe, if the total transmission power of the terminal equipment obtained through calculation is greater than the maximum output power of the terminal equipment, the terminal equipment may adjust the transmission power of a signal of relatively lower priority order according to the priority order of the PRACH signals and each physical uplink channel signal, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby providing a practical and feasible power control method for a scenario newly occurred in Rel-11 in which the power of the terminal equipment is limited. 
         [0173]    An embodiment of the present invention further provides terminal equipment, as described in Embodiment 5 below. As the principle of the terminal equipment for solving problem is similar to that of the method in embodiments 1 and 2, the implementation of the method may be referred to for the implementation of the terminal equipment, and the repeated parts shall not be described any further. 
       Embodiment 5 
       [0174]      FIG. 11  is a schematic diagram of the structure of terminal equipment provided by an embodiment of the present invention. Referring to  FIG. 11 , the terminal equipment includes: 
         [0175]    a first determining unit  111  configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit an uplink SRS signal in other serving cell(s) within the same OFDM symbol; and 
         [0176]    a first processing unit  112  configured to drop the SRS signal in the other serving cell(s) or puncture symbols of the PRACH signal in the secondary serving cell within the same OFDM symbol as the SRS signal in the other serving cell(s) if the determination result of the first determining unit  111  is positive. 
         [0177]    In this embodiment, the terminal equipment further includes: 
         [0178]    a second determining unit  113  configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit a physical uplink channel signal in other serving cell(s) within the same subframe; and 
         [0179]    a second processing unit  114  configured to adjust the transmission power of the PRACH signal and/or the physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal when total transmission power is greater than maximum output power when it is determined positive by the second determining unit  113 , until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0180]    In an implementation, there is one type of physical uplink channel signal, and the second processing unit  114  includes: 
         [0181]    a first judging module  1141  configured to judge whether the priority order of the PRACH signal is the same as that of the physical uplink channel signal; 
         [0182]    a first processing module  1142  configured to reduce the transmission power of the PRACH signal and the physical uplink channel signal by an equal share when the result of judgment of the first judging module  1141  is positive, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and 
         [0183]    a second processing module  1143  configured to satisfy first the transmission power of the signal with a higher priority order when the result of judgment of the first judging module  1141  is negative, and then reduce the transmission power of the signal with a lower priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0184]    In another implementation, there are two types of physical uplink channel signals, and the second processing unit  114  further includes: 
         [0185]    a third processing module  1144  configured to satisfy the transmission power of the signal with a highest priority order; 
         [0186]    a second judging module  1145  configured to judge whether the priority orders of the rest two signals are the same after the processing of the third processing module  1144 ; 
         [0187]    a fourth processing module  1146  configured to reduce the transmission power of the rest two signals by an equal share when the result of judgment of the second judging module  1145  is positive, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0188]    a third judging module  1147  configured to judge whether the rest transmission power satisfies the transmission power of the signal with a secondary priority order when the result of judgment of the second judging module  1145  is negative; 
         [0189]    a fifth processing module  1148  configured to satisfy the transmission power of the signal with the secondary priority order when the result of judgment of the third judging module  1147  is positive, and reduce the transmission power of the signal with a lowest priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and 
         [0190]    a sixth processing module  1149  configured to set the transmission power of the signal with the lowest priority order to be 0 when the result of judgment of the third judging module  1147  is negative, and allocate the rest transmission power to the signal with the secondary priority order. 
         [0191]    In still another implementation, there are three types of physical uplink channel signals, and the second processing unit  114  includes: 
         [0192]    a seventh processing module  11410  configured to satisfy the transmission power of the signal with a highest priority order; 
         [0193]    a fourth judging module  11411  configured to judge whether the transmission power of the signal with a secondary priority order can be satisfied after the processing of the seventh processing module  11410 ; 
         [0194]    an eighth processing module  11412  configured to allocate the rest transmission power to the signal with a secondary priority order when the result of judgment of the fourth judging module  11411  is negative, and set the transmission power of other signals to be 0; 
         [0195]    a ninth processing module  11413  configured to satisfy the transmission power of the signal with the secondary priority order when the result of judgment of the fourth judging module  11411  is positive; 
         [0196]    a fifth judging module  11414  configured to judge whether the priority orders of the rest two signals are the same after the processing of the ninth processing module  11413 ; 
         [0197]    a tenth processing module  11415  configured to reduce the transmission power of the rest two signals by an equal share when the result of judgment of the fifth judging module  11414  is positive, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; 
         [0198]    a sixth judging module  11416  configured to judge whether the rest transmission power satisfies the transmission power of the signal with a relatively higher priority order of the two rest signals when the result of judgment of the fifth judging module  11414  is negative; 
         [0199]    an eleventh processing module  11417  configured to satisfy the transmission power of the signal with the relatively higher priority order when the result of judgment of the sixth judging module  11416  is positive, and reduce the transmission power of the signal with a lowest priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment; and 
         [0200]    a twelfth processing module  11418  configured to set the transmission power of the signal with the lowest priority order to be 0 when the result of judgment of the sixth judging module  11416  is negative, and allocate the rest transmission power to the signal with the relatively higher priority order. 
         [0201]    In this embodiment, the physical uplink channel signal may include any combination of the following signals: a PUCCH signal, a PUSCH signal with UCI, and a PUSCH with no UCI. Wherein, the priority orders of the PRACH signal, the PUCCH signal, the PUSCH signal with UCI and the PUSCH with no UCI may be predefined as: the priority order of the PUSCH signal with no UCI is less than or equal to that of the PRACH signal, the priority order of the PRACH signal is less than that of the PUSCH signal with UCI, and the priority order of the PUSCH signal with UCI is less than that of the PUCCH signal. 
         [0202]    With the terminal equipment of this embodiment, when it is needed to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, the transmission power of the terminal equipment is lowered by dropping the SRS signals and transmitting only the PRACH signals, or by puncturing the PRACH signals in the same OFDM symbol as the SRS signals and transmitting only the SRS signals, and the problem that the total transmission power is greater than the configured maximum output power resulted from transmitting SRS signals and PRACH signals by the terminal equipment in the same OFDM symbol at the same time is soved. Furthermore, when it is needed to transmit PRACH signals in an SCell and transmit physical uplink channel signals in other cell(s) within the same subframe, the terminal equipment may determine a power control policy according to the priority orders of the PRACH signals and each physical uplink channel signal, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby providing a practical and feasible power control method for a scenario newly occurred in Rel-11 in which the power of the terminal equipment is limited. 
         [0203]    An embodiment of the present invention further provides terminal equipment, as described in Embodiment 6 below. As the principle of the terminal equipment for solving problem is similar to that of the method in embodiments 3 and 4, the implementation of the method in embodiments 3 and 4 may be referred to for the implementation of the terminal equipment, and the repeated parts shall not be described any further. 
       Embodiment 6 
       [0204]      FIG. 12  is a schematic diagram of the structure of terminal equipment provided by an embodiment of the present invention. Referring to  FIG. 12 , the terminal equipment includes: a first determining unit  121  configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit an uplink SRS signal in other serving cell(s) within the same OFDM symbol; 
         [0205]    a first judging unit  122  configured to judge whether total transmission power is greater than maximum output power of the terminal equipment when it is determined positive by the first determining unit  121 ; and a first processing unit  123  configured to adjust the transmission power of the PRACH signal and the SRS signal according to the priority orders of the PRACH signal and the SRS signal when the result of judgment of the first judging unit  122  is positive. 
         [0206]    In an embodiment, the first processing unit  123  includes: 
         [0207]    a first judging module  1231  configured to judge whether the maximum output power of the terminal equipment satisfies the transmission power of the SRS signal; 
         [0208]    a first processing module  1232  configured to satisfy the transmission power of the SRS signal when the result of judgment of the first judging module  1231  is positive, and allocate the rest transmission power to the PRACH signal; and 
         [0209]    a second processing module  1233  configured to set the transmission power of the PRACH signal to be 0 when the result of judgment of the first judging module  1231  is negative, and allocate the maximum output power to all the SRS signals by an equal share. 
         [0210]    In this embodiment, the terminal equipment further includes: 
         [0211]    a second determining unit  124  configured to determine whether the terminal equipment needs to transmit a PRACH signal in a secondary serving cell and transmit a physical uplink channel signal in other serving cell(s) within the same subframe; 
         [0212]    a second judging unit  125  configured to judge whether the total transmission power is greater than the maximum output power of the terminal equipment when it is determined positive by the second determining unit  124 ; and 
         [0213]    a second processing unit  126  configured to adjust the transmission power of the PRACH signal or adjust the transmission power of the PRACH signal and the physical uplink channel signal according to predefined priority orders of the PRACH signal and the physical uplink channel signal when it is determined positive by the second judging unit  125 , until the adjusted total transmission power is less than or equal to the maximum output power of the terminal equipment. 
         [0214]    In an embodiment, there is one type of physical uplink channel signal, and the second processing unit  126  includes: 
         [0215]    a second judging module  1261  configured to judge whether the maximum output power of the terminal equipment satisfies the transmission power of the signal with a higher priority order; 
         [0216]    a third processing module  1262  configured to satisfy the transmission power of the signal with the higher priority order when the result of judgment of the second judging module  1261  is positive, and allocate the rest transmission power to the signal with a lower priority order; and 
         [0217]    a fourth processing module  1263  configured to set the transmission power of the signal with the lower priority order to be 0 when the result of judgment of the second judging module  1261  is negative, and allocate the rest transmission power to the signal with the higher priority order. 
         [0218]    In another embodiment, there are two types of physical uplink channel signals, and the second processing unit  126  includes: 
         [0219]    a fifth processing module  1264  configured to satisfy the transmission power of the signal with a highest priority order; 
         [0220]    a third judging module  1265  configured to judge whether the rest transmission power satisfies the transmission power of the signal with a secondary priority order after the processing of the fifth processing module  1264 ; 
         [0221]    a sixth processing module  1266  configured to satisfy the transmission power of the signal with a secondary priority order when the result of judgment of the third judging module  1265  is positive, and then allocate the rest transmission power to the signal with a lowest priority order; and 
         [0222]    a seventh processing module  1267  configured to set the transmission power of the signal with the lowest priority order to be 0 when the result of judgment of the third judging module  1265  is negative, and allocate the rest transmission power to the signal with the secondary priority order. 
         [0223]    In still another embodiment, there are three types of physical uplink channel signals, and the second processing unit  126  includes: 
         [0224]    an eighth processing module  1268  configured to satisfy the transmission power of the signal with a highest priority order; 
         [0225]    a fourth judging module  1269  configured to judge whether the rest transmission power satisfies the transmission power of the signal with a secondary priority order after the processing of the eighth processing module  1268 ; 
         [0226]    a ninth processing module  12610  configured to allocate the rest transmission power to the signal with the secondary priority order when the result of judgment of the fourth judging module  1269  is negative, and set the transmission power of the rest signals to be 0; 
         [0227]    a tenth processing module  12611  configured to satisfy the transmission power of the signal with the secondary priority order when the result of judgment of the fourth judging module  1269  is positive; 
         [0228]    a fifth judging module  12612  configured to judge whether the rest transmission power satisfies the signal with a third priority order after the processing of the tenth processing module  12611 ; 
         [0229]    an eleventh processing module  12613  configured to satisfy the transmission power of the signal with the third priority order when the result of judgment of the fifth judging module  12612  is positive, and then allocate the rest transmission power to the signal with a lowest priority order; and 
         [0230]    a twelfth processing module  12614  configured to set the transmission power of the signal with the lowest priority order to be 0 when the result of judgment of the fifth judging module  12612  is negative, and allocate the rest transmission power to the signal with the third priority order. 
         [0231]    In this embodiment, the physical uplink channel signal may include any combination of the following signals: a PUCCH signal, a PUSCH signal with UCI, and a PUSCH with no UCI. Wherein, the priority orders of the PRACH signal, the PUCCH signal, the PUSCH signal with UCI and the PUSCH with no UCI may be predefined as: the priority order of the PRACH signal is less than that of the PUSCH signal with no UCI, the priority order of the PUSCH signal with no UCI is less than that of the PUSCH signal with UCI, and the priority order of the PUSCH signal with UCI is less than that of the PUCCH signal. 
         [0232]    With the terminal equipment of this embodiment, when it is needed to transmit PRACH signals and SRS signals in different serving cells within the same OFDM symbol at the same time, the terminal equipment lowers the transmission power of the signal of relatively lower priority order, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby solving the problem that the total transmission power is greater than the configured maximum output power resulted from transmitting SRS signals and PRACH signals by the terminal equipment in the same OFDM at the same time. Furthermore, when it is needed to transmit PRACH signals in an SCell and transmit physical uplink channel signals in other cell(s) within the same subframe, the terminal equipment may determine a power control policy according to the priority orders of the PRACH signals and each physical uplink channel signal, so as to ensure that the total transmission power is less than or equal to the maximum output power of the terminal equipment, thereby providing a practical and feasible power control method for a scenario newly occurred in Rel-11 in which the power of the terminal equipment is limited. 
         [0233]    An embodiment of the present invention further provides a computer-readable program, wherein when the program is executed in terminal equipment, the program enables a computer to carry out the power control method as described in embodiments 1-4 in the terminal equipment. 
         [0234]    An embodiment of the present invention further provides a storage medium in which a computer-readable program is stored, wherein the computer-readable program enables a computer to carry out the power control method as described in embodiments 1-4 in terminal equipment. 
         [0235]    The above apparatuses and methods of the present invention may be implemented by hardware, or by hardware in combination with software. The present invention relates to such a computer-readable program that when the program is executed by a logic device, the logic device is enabled to carry out the apparatus or components as described above, or to carry out the methods or steps as described above. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a floppy disk, a CD, a DVD, and a flash memory, etc. 
         [0236]    The present invention is described above with reference to particular embodiments. However, it should be understood by those skilled in the art that such a description is illustrative only, and not intended to limit the protection scope of the present invention. Various variants and modifications may be made by those skilled in the art according to the spirits and principle of the present invention, and such variants and modifications fall within the scope of the present invention.