METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER OF USER EQUIPMENT IN CARRIER AGGREGATION SCENARIO

US 20150163750A1
Filed: 02/20/2015
Published: 06/11/2015
Est. Priority Date: 08/24/2012
Status: Active Grant

First Claim

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1. A method for controlling uplink power of a user equipment in a carrier aggregation scenario, the method comprising:

separately acquiring first maximum transmit power of the user equipment corresponding to a first subframe and second maximum transmit power of the user equipment corresponding to a second subframe; and

when the first maximum transmit power and the second maximum transmit power are different, performing power control over transmit power of multiple carriers in an overlap region, so that total transmit power of the multiple carriers in the overlap region after the power control is lower than or equal to a minimum value of the first maximum transmit power and the second maximum transmit power;

wherein, the first subframe and the second subframe are adjacent subframes, and the overlap region is a portion in which the first subframe and the second subframe overlap due to a difference in timing advance values of the multiple carriers.

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Abstract

The present invention provides a method and an apparatus for controlling uplink power of a user equipment, where the method includes: separately acquiring first maximum transmit power of the user equipment corresponding to a first subframe and second maximum transmit power of the user equipment corresponding to a second subframe; and when the first maximum transmit power and the second maximum transmit power are different, using a minimum value of the first maximum transmit power and the second maximum transmit power as first configured maximum transmit power, and performing power control over transmit power of multiple carriers in an overlap region according to the first configured maximum transmit power, so that total transmit power of the multiple carriers in the overlap region after the power control is lower than or equal to the minimum value of the first maximum transmit power and the second maximum transmit power.

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26 Claims

1. A method for controlling uplink power of a user equipment in a carrier aggregation scenario, the method comprising:
- separately acquiring first maximum transmit power of the user equipment corresponding to a first subframe and second maximum transmit power of the user equipment corresponding to a second subframe; and
  
  when the first maximum transmit power and the second maximum transmit power are different, performing power control over transmit power of multiple carriers in an overlap region, so that total transmit power of the multiple carriers in the overlap region after the power control is lower than or equal to a minimum value of the first maximum transmit power and the second maximum transmit power;
  
  wherein, the first subframe and the second subframe are adjacent subframes, and the overlap region is a portion in which the first subframe and the second subframe overlap due to a difference in timing advance values of the multiple carriers.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- - 2. The method according to claim 1, wherein performing power control over transmit power of multiple carriers in an overlap region according to the first configured maximum transmit power comprises:
    - separately performing, according to the first configured maximum transmit power, power control over transmit power of the first subframe locating the overlap region and transmit power of the second subframe locating the overlap region;
      
      orseparately performing, according to the first configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe and power of a symbol forming the overlap region in the second subframe;
      
      orperforming power control over transmit power of sampling points in the overlap region according to the first configured maximum transmit power.
  - 3. The method according to claim 1, further comprising:
    - acquiring an upper limit P_CMAX_—_H_—_CA_—₁of the first maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₁=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe forming the overlap region, and maximum transmit power P_EMAX.2of a second carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1or the maximum transmit power P_EMAX.2is not allowed;
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₁of the first maximum transmit power according to the P_EMAX.1and the P_EMAX.2by using a formula P_CMAX_—_L_—_CA_—₁=min{10 log₁₀₁Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      T_c}; and
      
      acquiring first reference transmit power P_CMAX_—_O1according to the P_CMAX_—_H_—_CA_—₁and the P_CMAX_—_L_—_CA_—₁, so that the P_CMAX_—_O1satisfies P_CMAX_—_L_—_CA_—₁≦
      
      P_CMAX_—_O1≦
      
      P_CMAX_—_H_—_CA_—₁, wherein performing power control over transmit power of multiple carriers in an overlap region comprises;
      
      performing power control over transmit power of the first carrier and the second carrier in the overlap region by using the first reference transmit power;
      
      wherein, the first carrier is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      timing advance values of the first timing advance group and the second timing advance group are different;
      
      C in the P_EMAX.Cis {1,2};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 4. The method according to claim 3, wherein performing power control over the first carrier and the second carrier in the multiple carriers in the overlap region by using the first reference transmit power comprises:
    - using a minimum value of the first maximum transmit power and the first reference transmit power as second configured maximum transmit power, and performing, according to the second configured maximum transmit power, power control over transmit power of the first subframe locating the overlap region in the first carrier; and
      
      using a minimum value of the second maximum transmit power and the first reference transmit power as third configured maximum transmit power, and performing, according to the third configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier.
  - 5. The method according to claim 3, wherein performing power control over the first carrier and the second carrier in the multiple carriers in the overlap region by using the first reference transmit power comprises:
    - using a minimum value of the first maximum transmit power and the first reference transmit power as second configured maximum transmit power, and performing, according to the second configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier; and
      
      using a minimum value of the second maximum transmit power and the first reference transmit power as third configured maximum transmit power, and performing, according to the third configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier.
  - 6. The method according to claim 3, wherein performing power control over the first carrier and the second carrier in the multiple carriers in the overlap region by using the first reference transmit power comprises:
    - performing power control over transmit power of sampling points in the overlap region according to the first reference transmit power.
  - 7. The method according to claim 1, further comprising:
    - acquiring an upper limit P_CMAX_—_H_—_CA_—₂of the second maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₂=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe locating the overlap region, maximum transmit power P_EMAX.2of a second carrier delivered by the network in the first subframe locating the overlap region, and maximum transmit power P_EMAX.3of a third carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.2, or the maximum transmit power P_EMAX.3is not allowed;
      
      acquiring an upper limit P_CMAX_—_H_—_CA_—₃of third maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₃=min{10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.4of the second carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.3of the third carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.4, or the maximum transmit power P_EMAX.3is not allowed;
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₂of the second maximum transmit power according to the P_EMAX.1, the P_EMAX.2, and the P_EMAX.3by using a formula P_CMAX_—_L_—_CA_—₂=min{10 log₁₀Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      M R)−
      
      □
      
      T_c};
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₃of the third maximum transmit power according to the P_EMAX.1, the P_EMAX.4, and the P_EMAX.3by using a formula P_CMAX_—_L_—_CA_—₃=min{10 log₁₀Σ
      
      P_EMAX.N−
      
      □
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_N};
      
      acquiring second reference transmit power P_CMAX_—_O2according to the P_CMAX_—_H_—_CA_—₂and the P_CMAX_—_L_—_CA_—₂, so that the P_CMAX_—_O2satisfies P_CMAX_—_L_—_CA_—₂≦
      
      P_CMAX_—_O2≦
      
      P_CMAX_—_H_—_CA_—₂; and
      
      acquiring third reference transmit power P_CMAX_—_O3according to the P_CMAX_—_H_—_CA_—₃and the P_CMAX_—_L_—_CA_—₃, so that the P_CMAX_—_O3satisfies P_CMAX_—_L_—_CA_—₃≦
      
      P_CMAX_—_O3≦
      
      P_CMAX_—_H_—_CA_—₃, wherein performing power control over transmit power of multiple carriers in an overlap region comprises;
      
      performing power control over transmit power of the first carrier, the second carrier, and the third carrier in the overlap region by using the second reference transmit power and the third reference transmit power;
      
      wherein, the first carrier is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      the third carrier is located in a third timing advance group;
      
      timing advance values of the first timing advance group, the second timing advance group, and the third timing advance group are different;
      
      C in the P_EMAX.Cis {1,2,3};
      
      N in the P_EMAX.Nis {1,4,3};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 8. The method according to claim 7, wherein performing power control over transmit power of the first carrier, the second carrier, and the third carrier in the overlap region by using the second reference transmit power and the third reference transmit power comprises:
    - using a minimum value of the first maximum transmit power, the second reference transmit power, and the third reference transmit power as fourth configured maximum transmit power, and performing, according to the fourth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the first carrier;
      
      using a minimum value of the first maximum transmit power and the second reference transmit power as fifth configured maximum transmit power, and performing, according to the fifth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the second carrier;
      
      using a minimum value of the second maximum transmit power and the third reference transmit power as sixth configured maximum transmit power, and performing, according to the sixth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier; and
      
      using a minimum value of the second maximum transmit power, the second reference transmit power, and the third reference transmit power as seventh configured maximum transmit power, and performing, according to the seventh configured maximum transmit power, power control over power of the second subframe locating the overlap region in the third carrier.
  - 9. The method according to claim 7, wherein performing power control over transmit power of the first carrier, the second carrier, and the third carrier in the overlap region by using the second reference transmit power and the third reference transmit power comprises:
    - using a minimum value of the first maximum transmit power, the second reference transmit power, and the third reference transmit power as fourth configured maximum transmit power, and performing, according to the fourth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier;
      
      using a minimum value of the first maximum transmit power and the second reference transmit power as fifth configured maximum transmit power, and performing, according to the fifth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the second carrier;
      
      using a minimum value of the second maximum transmit power and the third reference transmit power as sixth configured maximum transmit power, and performing, according to the sixth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier; and
      
      using a minimum value of the second maximum transmit power, the second reference transmit power, and the third reference transmit power as seventh configured maximum transmit power, and performing, according to the seventh configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the third carrier.
  - 10. The method according to claim 1, further comprising:
    - acquiring an upper limit P_CMAX_—_H_—_CA_—₄of fourth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₄=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe locating the overlap region, maximum transmit power P_EMAX.2of a second carrier delivered by the network in the first subframe locating the overlap region, maximum transmit power P_EMAX.3of a third carrier delivered by the network in the first subframe locating the overlap region, and maximum transmit power P_EMAX.4of a fourth carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.2, the maximum transmit power P_EMAX.3, or the maximum transmit power P_EMAX.4is not allowed;
      
      acquiring an upper limit P_CMAX_—_H_—_CA_—₅of fifth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₅=min{10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, the maximum transmit power P_EMAX.2of the second carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.5of the third carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.4of the fourth carrier in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1the maximum transmit power P_EMAX.2, the maximum transmit power P_EMAX.5, or the maximum transmit power P_EMAX.4is not allowed;
      
      acquiring an upper limit P_CMAX_—_H_—_CA_—₆of sixth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₆=min{10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.6of the second carrier in the second subframe locating the overlap region, the maximum transmit power P_EMAX.5of the third carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.4of the fourth carrier in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.6, the maximum transmit power P_EMAX.5, or the maximum transmit power P_EMAX.4is not allowed;
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₄of the fourth maximum transmit power according to the P_EMAX.1, the P_EMAX.2, the P_EMAX.3, and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₄=min{10 log₁₀Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_c};
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₅of the fifth maximum transmit power according to the P_EMAX.1, the P_EMAX.2, the P_EMAX.5, and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₅=min{10 log₁₀Σ
      
      P_EMAX.N−
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      M R)−
      
      □
      
      T_N};
      
      acquiring a lower limit P_CMAX_—_L_—_CA_—₆an of the sixth maximum transmit power according to the P_EMAX.1, the P_EMAX.6, the P_EMAX.5, and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₆=min{10 log₁₀Σ
      
      P_EMAX.M−
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      T_N};
      
      acquiring fourth reference transmit power P_CMAX_—_O4according to the P_CMAX_—_H_—_CA_—₄and the P_CMAX_—_L_—_CA_—₄, so that the P_CMAX_—_O4satisfies P_CMAX_—_L_—_CA_—₄≦
      
      P_CMAX_—_O4≦
      
      P_CMAX_—_H_—_CA_—₄;
      
      acquiring fifth reference transmit power P_CMAX_—_O5according to the P_CMAX_—_H_—_CA_—₅and the P_CMAX_—_L_—_CA_—₅;
      
      so that the P_CMAX_—_O5satisfies P_CMAX_—_L_—_CA_—₅≦
      
      P_CMAX_—_O5≦
      
      P_CMAX_—_H_—_CA_—₅; and
      
      acquiring sixth reference transmit power P_CMAX_—_O6according to the P_CMAX_—_H_—_CA_—₆and the P_CMAX_—_L_—_CA_—₆, so that the P_CMAX_—_O6satisfies P_CMAX_—_L_—_CA_—₆≦
      
      P_CMAX_—_O6≦
      
      P_CMAX_—_H_—_CA_—₆, wherein the performing power control over transmit power of multiple carriers in an overlap region comprises;
      
      performing power control over transmit power of the first carrier, the second carrier, the third carrier, and the fourth carrier in the overlap region by using the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power;
      
      wherein, the first carrier bearer is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      the third carrier is located in a third timing advance group;
      
      the fourth carrier is located in a fourth timing advance group;
      
      timing advance values of the first timing advance group, the second timing advance group, the third timing advance group, and the fourth timing advance group are different;
      
      C in the P_EMAX.Cis {1,2,3,4};
      
      N in the P_EMAX.Nis {1,2,5,4};
      
      M in the P_EMAX.Mis {1,6,5,4};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 11. The method according to claim 10, wherein performing power control over transmit power of the first carrier, the second carrier, the third carrier, and the fourth carrier in the overlap region by using the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power comprises:
    - using a minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as ninth configured maximum transmit power, and performing, according to the ninth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the first carrier;
      
      using a minimum value of the first maximum transmit power, the fourth reference transmit power, and the fifth reference transmit power as tenth configured maximum transmit power, and performing, according to the tenth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the second carrier;
      
      using a minimum value of the second maximum transmit power and the sixth reference transmit power as eleventh configured maximum transmit power, and performing, according to the eleventh configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier;
      
      using a minimum value of the first maximum transmit power and the fourth reference transmit power as twelfth configured maximum transmit power, and performing, according to the twelfth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the third carrier;
      
      using a minimum value of the second maximum transmit power, the fifth reference transmit power, and the sixth reference transmit power as thirteenth configured maximum transmit power, and performing, according to the thirteenth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the third carrier; and
      
      using the minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as fourteenth configured maximum transmit power, and performing, according to the fourteenth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the fourth carrier.
  - 12. The method according to claim 10, wherein performing power control over transmit power of the first carrier, the second carrier, the third carrier, and the fourth carrier in the overlap region by using the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power comprises:
    - using a minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as ninth configured maximum transmit power, and performing, according to the ninth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier;
      
      using a minimum value of the first maximum transmit power, the fourth reference transmit power, and the fifth reference transmit power as tenth configured maximum transmit power, and performing, according to the tenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the second carrier;
      
      using a minimum value of the second maximum transmit power and the sixth reference transmit power as eleventh configured maximum transmit power, and performing, according to the eleventh configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier;
      
      using a minimum value of the first maximum transmit power and the fourth reference transmit power as twelfth configured maximum transmit power, and performing, according to the twelfth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the third carrier;
      
      using a minimum value of the second maximum transmit power, the fifth reference transmit power, and the sixth reference transmit power as thirteenth configured maximum transmit power, and performing, according to the thirteenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the third carrier; and
      
      using the minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as fourteenth configured maximum transmit power, and performing, according to the fourteenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the fourth carrier.
  - 13. The method according to claim 10, wherein performing power control over transmit power of the first carrier, the second carrier, the third carrier, and the fourth carrier in the overlap region by using the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power comprises:
    - using a minimum value of the fourth reference transmit power, the fifth reference transmit power, and the third reference transmit power as fifteenth configured maximum transmit power, and separately performing, according to the fifteenth configured maximum transmit power, power control over transmit power of sampling points in the overlap region in the first subframe in the first carrier and transmit power of sampling points in the overlap region in the second subframe in the fourth carrier;
      
      using a minimum value of the fourth reference transmit power and the fifth reference transmit power as sixteenth configured maximum transmit power, and performing power control over transmit power of sampling points in the overlap region in the first subframe in the second carrier according to the sixteenth configured maximum transmit power;
      
      performing power control over transmit power of sampling points in the overlap region in the second subframe in the second carrier according to the sixth reference transmit power;
      
      performing power control over transmit power of sampling points in the overlap region in the first subframe in the third carrier according to the fourth reference transmit power; and
      
      using a minimum value of the fifth reference transmit power and the sixth reference transmit power as seventeenth configured maximum transmit power, and performing power control over transmit power of sampling points in the overlap region in the second subframe in the third carrier according to the seventeenth configured maximum transmit power.

14. An apparatus for controlling uplink power of a user equipment in a carrier aggregation scenario, the apparatus comprising:
- an acquiring module, configured to separately acquire first maximum transmit power of the user equipment corresponding to a first subframe and second maximum transmit power of the user equipment corresponding to a second subframe; and
  
  a power control module, configured to perform power control over transmit power of multiple carriers in an overlap region when the first maximum transmit power acquired by the acquiring module and the second maximum transmit power acquired by the acquiring module are different, so that total transmit power of the multiple carriers in the overlap region after the power control is lower than or equal to a minimum value of the first maximum transmit power and the second maximum transmit power;
  
  wherein, the first subframe and the second subframe are adjacent subframes, and the overlap region is a portion in which the first subframe and the second subframe overlap due to a difference in timing advance values of the multiple carriers.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
- - 15. The apparatus according to claim 14, wherein the power control module is configured to:
    - separately perform, according to the first configured maximum transmit power, power control over transmit power of the first subframe locating the overlap region and transmit power of the second subframe locating the overlap region;
      
      orseparately perform, according to the first configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe and power of a symbol forming the overlap region in the second subframe;
      
      orperform power control over transmit power of sampling points in the overlap region according to the first configured maximum transmit power.
  - 16. The apparatus according to claim 14, further comprising:
    - an upper limit calculating module, configured to acquire an upper limit P_CMAX_—_H_—_CA_—₁of the first maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₁=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe locating the overlap region, and maximum transmit power P_EMAX.2of a second carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1or the maximum transmit power P_EMAX.2is not allowed; and
      
      a lower limit calculating module, configured to acquire a lower limit P_CMAX_—_L_—_CA_—₁of the first maximum transmit power according to the P_EMAX.1and the P_EMAX.2by using a formula P_CMAX_—_L_—_CA_—₁=min{10 log₁₀Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_c}, whereinthe acquiring module is further configured to acquire first reference transmit power P_CMAX_—_O1according to the P_CMAX_—_H_—_CA_—₁acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₁acquired by the lower limit calculating module, so that the P_CMAX_—_O1satisfies P_CMAX_—_L_—_CA_—₁≦
      
      P_CMAX_—_O1≦
      
      P_CMAX_—_H_—_CA_—₁; and
      
      the power control module is configured to perform power control over transmit power of the first carrier and the second carrier in the overlap region by using the first reference transmit power;
      
      wherein, the first carrier is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      timing advance values of the first timing advance group and the second timing advance group are different;
      
      C in the P_EMAX.Cis {1,2};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 17. The apparatus according to claim 16, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power and the first reference transmit power as second configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the second configured maximum transmit power, power control over power of the first subframe locating the overlap region in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the second maximum transmit power and the first reference transmit power as third configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the third configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier.
  - 18. The apparatus according to claim 16, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power and the first reference transmit power as second configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the second configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the second maximum transmit power and the first reference transmit power as third configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the third configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier.
  - 19. The apparatus according to claim 16, wherein the power control module is configured to perform power control over transmit power of sampling points in the overlap region according to the first reference transmit power.
  - 20. The apparatus according to claim 14, further comprising:
    - an upper limit calculating module, configured to acquire an upper limit P_CMAX_—_H_—_CA_—₂of the second maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₂=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe locating the overlap region, maximum transmit power P_EMAX.2of a second carrier delivered by the network in the first subframe locating the overlap region, and maximum transmit power P_EMAX.3of a third carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.2, or the maximum transmit power P_EMAX.3is not allowed, whereinthe upper limit calculating module is further configured to acquire an upper limit P_CMAX_—_H_—_CA_—₃of third maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₃=min{10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.4of the second carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.3of the third carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.4, or the maximum transmit power P_EMAX.3is not allowed; and
      
      a lower limit calculating module, configured to acquire a lower limit P_CMAX_—_L_—_CA_—₂of the second maximum transmit power according to the P_EMAX.1, the P_EMAX.2, and the P_EMAX.3by using a formula P_CMAX_—_L_—_CA_—₂=min{10 log₁₀Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_c}, whereinthe lower limit calculating module is further configured to acquire a lower limit P_CMAX_—_L_—_CA_—₃of the third maximum transmit power according to the P_EMAX.1, the P_EMAX.4, and the P_EMAX.3by using a formula P_CMAX_—_L_—_CA_—₃=min{10 log₁₀Σ
      
      P_EMAX.N−
      
      □
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_N};
      
      the acquiring module is further configured to acquire second reference transmit power P_CMAX_—_O2according to the P_CMAX_—_H_—_CA_—₂acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₂acquired by the lower limit calculating module, so that the P_CMAX_—_O2satisfies P_CMAX_—_L_—_CA_—₂≦
      
      P_CMAX_—_O2≦
      
      P_CMAX_—_H_—_CA_—₂;
      
      the acquiring module is further configured to acquire third reference transmit power P_CMAX_—_O3according to the P_CMAX_—_H_—_CA_—₃acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₃acquired by the lower limit calculating module, so that the P_CMAX_—_O3satisfies P_CMAX_—_L_—_CA_—₃≦
      
      P_CMAX_—_O3≦
      
      P_CMAX_—_H_—_CA_—₃; and
      
      the power control module is configured to perform power control over transmit power of the first carrier, the second carrier, and the third carrier in the overlap region by using the second reference transmit power and the third reference transmit power;
      
      wherein, the first carrier bearer is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      the third carrier is located in a third timing advance group;
      
      timing advance values of the first timing advance group, the second timing advance group, and the third timing advance group are different;
      
      C in the P_EMAX.Cis {1, 2,3};
      
      N in the {1,4,3};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 21. The apparatus according to claim 20, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power, the second reference transmit power, and the third reference transmit power as fourth configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the fourth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the first maximum transmit power and the second reference transmit power as fifth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the fifth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power and the third reference transmit power as sixth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the sixth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power, the second reference transmit power, and the third reference transmit power as seventh configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the seventh configured maximum transmit power, power control over power of the second subframe locating the overlap region in the third carrier.
  - 22. The apparatus according to claim 20, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power, the second reference transmit power, and the third reference transmit power as fourth configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the fourth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the first maximum transmit power and the second reference transmit power as fifth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the fifth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power and the third reference transmit power as sixth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the sixth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power, the second reference transmit power, and the third reference transmit power as seventh configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the seventh configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the third carrier.
  - 23. The apparatus according to claim 14, further comprising:
    - an upper limit calculating module, configured to acquire an upper limit P_CMAX_—_H_—_CA_—₄of fourth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₄=min{10 log₁₀Σ
      
      P_EMAX.C,P_PowerClass} and according to maximum transmit power P_EMAX.1of a first carrier delivered by a network in the first subframe locating the overlap region, maximum transmit power P_EMAX.2of a second carrier delivered by the network in the first subframe locating the overlap region, maximum transmit power P_EMAX.3of a third carrier delivered by the network in the first subframe locating the overlap region, and maximum transmit power P_EMAX.4of a fourth carrier delivered by the network in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.2, the maximum transmit power P_EMAX.3, or the maximum transmit power P_EMAX.4is not allowed, whereinthe upper limit calculating module is further configured to acquire an upper limit P_CMAX_—_H_—_CA_—₅of fifth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₅=min{10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, the maximum transmit power P_EMAX.2of the second carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.5of the third carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.4of the fourth carrier in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.2, the maximum transmit power P_EMAX.5, or the maximum transmit power P_EMAX.4is not allowed; and
      
      the upper limit calculating module is further configured to acquire an upper limit P_CMAX_—_H_—_CA_—₆of sixth maximum transmit power by using a formula P_CMAX_—_H_—_CA_—₆=min {10 log₁₀Σ
      
      P_EMAX.N,P_PowerClass} and according to the maximum transmit power P_EMAX.1of the first carrier in the first subframe locating the overlap region, maximum transmit power P_EMAX.6of the second carrier in the second subframe locating the overlap region, the maximum transmit power P_EMAX.5of the third carrier in the second subframe locating the overlap region, and the maximum transmit power P_EMAX.4of the fourth carrier in the second subframe locating the overlap region, wherein exceeding the maximum transmit power P_EMAX.1, the maximum transmit power P_EMAX.6, the maximum transmit power P_EMAX.5, or the maximum transmit power P_EMAX.4is not allowed; and
      
      a lower limit calculating module, configured to acquire a lower limit P_CMAX_—_L_—_CA_—₄of the fourth maximum transmit power according to the P_EMAX.1, the P_EMAX.2, the P_EMAX.3and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₄=min{10 log₁₀Σ
      
      P_EMAX.C−
      
      □
      
      T_c,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_c}, whereinthe lower limit calculating module is further configured to acquire a lower limit P_CMAX_—_L_—_CA_—₅of the fifth maximum transmit power according to the P_EMAX.1, the P_EMAX.2, the P_EMAX.5, and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₅=min {10 log₁₀Σ
      
      P_EMAX.N−
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_N};
      
      the lower limit calculating module is further configured to acquire a lower limit P_CMAX_—_L_—_CA_—₆of the sixth maximum transmit power according to the P_EMAX.1, the P_EMAX.6, the P_EMAX.5, and the P_EMAX.4by using a formula P_CMAX_—_L_—_CA_—₆=min{10 log₁₀Σ
      
      P_EMAX.M−
      
      □
      
      T_N,P_PowerClass−
      
      max(MPR+A−
      
      MPR,P−
      
      MPR)−
      
      □
      
      T_N};
      
      the acquiring module is further configured to acquire fourth reference transmit power P_CMAX_—_O4according to the P_CMAX_—_H_—_CA_—₄acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₄acquired by the lower limit calculating module, so that the P_CMAX_—_O4satisfies P_CMAX_—_L_—_CA_—₄≦
      
      P_CMAX_—_O4≦
      
      P_CMAX_—_H_—_CA_—₄;
      
      the acquiring module is further configured to acquire fifth reference transmit power P_CMAX_—_O5according to the P_CMAX_—_H_—_CA_—₅acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₅acquired by the lower limit calculating module, so that the P_CMAX_—_O5satisfies P_CMAX_—_L_—_CA_—₅≦
      
      P_CMAX_—_O5≦
      
      P_CMAX_—_H_—_CA_—₅;
      
      the acquiring module is further configured to acquire sixth reference transmit power P_CMAX_—_O6according to the P_CMAX_—_H_—_CA_—₆acquired by the upper limit calculating module and the P_CMAX_—_L_—_CA_—₆acquired by the lower limit calculating module, so that the P_CMAX_—_O6satisfies P_CMAX_—_L_—_CA_—₆≦
      
      P_CMAX_—_O6≦
      
      P_CMAX_—_H_—_CA_—₆, andthe power control module is configured to perform power control over transmit power of the first carrier, the second carrier, the third carrier, and the fourth carrier in the overlap region by using the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power;
      
      wherein, the first carrier bearer is located in a first timing advance group;
      
      the second carrier is located in a second timing advance group;
      
      the third carrier is located in a third timing advance group;
      
      the fourth carrier is located in a fourth timing advance group;
      
      timing advance values of the first timing advance group, the second timing advance group, the third timing advance group, and the fourth timing advance group are different;
      
      C in the P_EMAX.Cis {1,2,3,4};
      
      N in the P_EMAX.Nis {1,2,5,4};
      
      M in the P_EMAX.Mis {1,6,5,4};
      
      the P_PowerClassindicates a maximum power transmit capability of the UE;
      
      the MPR, the A−
      
      MPR, and the P−
      
      MPR all indicate maximum power back-off; and
      
      □
      
      T_c=1.5 dB or □
      
      T_c=0 dB.
  - 24. The apparatus according to claim 23, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as ninth configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the ninth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the first maximum transmit power, the fourth reference transmit power, and the fifth reference transmit power as tenth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the tenth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power and the sixth reference transmit power as eleventh configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the eleventh configured maximum transmit power, power control over power of the second subframe locating the overlap region in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the first maximum transmit power and the fourth reference transmit power as twelfth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the twelfth configured maximum transmit power, power control over power of the first subframe locating the overlap region in the third carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power, the fifth reference transmit power, and the sixth reference transmit power as thirteenth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the thirteenth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the third carrier;
      
      the configuring unit is further configured to use any value or the minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as fourteenth configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the fourteenth configured maximum transmit power, power control over power of the second subframe locating the overlap region in the fourth carrier.
  - 25. The apparatus according to claim 23, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as ninth configured maximum transmit power; and
      
      a power control unit, configured to perform, according to the ninth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the first carrier, whereinthe configuring unit is further configured to use a minimum value of the first maximum transmit power, the fourth reference transmit power, and the fifth reference transmit power as tenth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the tenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power and the sixth reference transmit power as eleventh configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the eleventh configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the second carrier;
      
      the configuring unit is further configured to use a minimum value of the first maximum transmit power and the fourth reference transmit power as twelfth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the twelfth configured maximum transmit power, power control over power of a symbol forming the overlap region in the first subframe in the third carrier;
      
      the configuring unit is further configured to use a minimum value of the second maximum transmit power, the fifth reference transmit power, and the sixth reference transmit power as thirteenth configured maximum transmit power;
      
      the power control unit is further configured to perform, according to the thirteenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the third carrier;
      
      the configuring unit is further configured to use the minimum value of the first maximum transmit power, the fourth reference transmit power, the fifth reference transmit power, and the sixth reference transmit power as fourteenth configured maximum transmit power; and
      
      the power control unit is further configured to perform, according to the fourteenth configured maximum transmit power, power control over power of a symbol forming the overlap region in the second subframe in the fourth carrier.
  - 26. The apparatus according to claim 23, wherein the power control module comprises:
    - a configuring unit, configured to use a minimum value of the fourth reference transmit power, the fifth reference transmit power, and the third reference transmit power as fifteenth configured maximum transmit power; and
      
      a power control unit, configured to separately perform, according to the fifteenth configured maximum transmit power, power control over transmit power of sampling points in the overlap region in the first subframe in the first carrier and transmit power of sampling points in the overlap region in the second subframe in the fourth carrier, whereinthe configuring unit is further configured to use a minimum value of the fourth reference transmit power and the fifth reference transmit power as sixteenth configured maximum transmit power;
      
      the power control unit is further configured to perform power control over transmit power of sampling points in the overlap region in the first subframe in the second carrier according to the sixteenth configured maximum transmit power;
      
      the power control unit is further configured to perform power control over transmit power of sampling points in the overlap region in the second subframe in the second carrier according to the sixth reference transmit power;
      
      the power control unit is further configured to perform power control over transmit power of sampling points in the overlap region in the first subframe in the third carrier according to the fourth reference transmit power;
      
      the configuring unit is further configured to use any value or a minimum value of the fifth reference transmit power and the sixth reference transmit power as seventeenth configured maximum transmit power; and
      
      the power control unit is further configured to perform power control over transmit power of sampling points in the overlap region in the second subframe in the third carrier according to the seventeenth configured maximum transmit power.

Specification

Resources

Litigation Campaign Assessment

Current Assignee
Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
Original Assignee
Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
Inventors
Zhang, Xingwei, Fan, Xiaoan, Xue, Lixia

Granted Patent

US 9,560,599 B2
Time in Patent Office

Days
Field of Search
US Class Current

1/1
CPC Class Codes

H04L 5/0042   intra-user or intra-termina...

H04W 52/146   Uplink power control

H04W 52/34   TPC management, i.e. sharin...

H04W 52/367   Power values between minimu...

H04W 72/0446   Resources in time domain, e...

H04W 72/0473   the resource being transmis...

METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER OF USER EQUIPMENT IN CARRIER AGGREGATION SCENARIO

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METHOD AND APPARATUS FOR CONTROLLING UPLINK POWER OF USER EQUIPMENT IN CARRIER AGGREGATION SCENARIO

First Claim

1 Assignment

Subscription Required

Subscription Required

0 Petitions

Subscription Required

Accused Products

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Abstract

Citations

26 Claims

Specification

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Solutions

Use Cases

Quick Links