WO2010124433A1 - 一种功率控制方法及装置 - Google Patents

一种功率控制方法及装置 Download PDF

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Publication number
WO2010124433A1
WO2010124433A1 PCT/CN2009/071484 CN2009071484W WO2010124433A1 WO 2010124433 A1 WO2010124433 A1 WO 2010124433A1 CN 2009071484 W CN2009071484 W CN 2009071484W WO 2010124433 A1 WO2010124433 A1 WO 2010124433A1
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WO
WIPO (PCT)
Prior art keywords
carrier
power
compression
transmit power
maximum transmit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2009/071484
Other languages
English (en)
French (fr)
Inventor
杨波
贺传峰
马雪利
王宗杰
李靖
马洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to MYPI2011005194A priority Critical patent/MY178173A/en
Priority to PCT/CN2009/071484 priority patent/WO2010124433A1/zh
Priority to EP09843845.0A priority patent/EP2427000B1/en
Priority to ES09843845.0T priority patent/ES2469804T3/es
Priority to EP13195395.2A priority patent/EP2712240B1/en
Priority to RU2011148272/07A priority patent/RU2496266C2/ru
Priority to CN2009801236555A priority patent/CN102077656B/zh
Priority to KR1020117027290A priority patent/KR101350288B1/ko
Priority to PT98438450T priority patent/PT2427000E/pt
Priority to BRPI0925338-6A priority patent/BRPI0925338B1/pt
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2010124433A1 publication Critical patent/WO2010124433A1/zh
Priority to US13/282,736 priority patent/US8625569B2/en
Anticipated expiration legal-status Critical
Priority to ZA2011/08189A priority patent/ZA201108189B/en
Priority to US14/097,959 priority patent/US9060339B2/en
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/06TPC algorithms
    • H04W52/16Deriving transmission power values from another channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/34Reselection control
    • H04W36/38Reselection control by fixed network equipment
    • H04W36/385Reselection control by fixed network equipment of the core network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/30Transmission power control [TPC] using constraints in the total amount of available transmission power
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/30Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367Power values between minimum and maximum limits, e.g. dynamic range
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04Transmission power control [TPC]
    • H04W52/30Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/34TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a power control method and apparatus.
  • WCDMA Wideband Code Division Multiple Access
  • WCDMA has the 99th version (R99, Release99) and 4th version (R4, Release4). ), version 5 (R5, Release5), version 6 (R6, Release6), version 7 (R7, Release7) and other versions.
  • HSUPA High Speed Uplink Packet Access
  • the maximum transmit power of the user equipment (UE, User Equipment) is specified in the WCDMA related protocol, and the UE needs to keep the actual uplink transmit power equal to or lower than the indicated maximum transmit power.
  • a power control method in the prior art is: calculating a transmit power required by the UE to transmit data to be transmitted on a single carrier, and if the calculated transmit power is equal to the power of other uplink channels.
  • the sum ie, the transmit power of the UE
  • the carrier is subjected to power compression such that the transmit power of the UE is less than or equal to the maximum transmit power.
  • an uplink dual carrier (DC-HSUPA, Dual Cell HSUPA) technology is introduced in the R9 version of WCDMA.
  • the technical solution can simultaneously transmit data using two uplink carriers, thereby improving uplink data. Transmission rate.
  • more carriers may be introduced in the future.
  • Embodiments of the present invention provide a power control method and apparatus, which can implement UE transmit power control in a multi-carrier mode.
  • the power control method provided by the embodiment of the present invention includes: when the user equipment sends through multiple carriers Data, calculating a transmit power of the user equipment; when the transmit power of the user equipment exceeds a preset maximum transmit power; performing stepwise power compression on the respective carriers according to an attribute parameter of each carrier or according to a compression ratio The respective carriers perform synchronous power compression.
  • the power control device includes: a first calculating unit, configured to calculate a transmit power of the user equipment; a first check unit, configured to determine whether a transmit power of the user equipment calculated by the first calculating unit is
  • the power control device further includes: a step-by-step compression unit, configured to: according to the attribute parameter of each carrier, when the transmit power of the user equipment exceeds a preset maximum transmit power Each of the carriers performs stepped power compression; or, the synchronous compression unit is configured to perform synchronous power compression on the carriers according to a compression ratio when a transmit power of the user equipment exceeds a preset maximum transmit power.
  • the stepwise power compression or the data may be performed on each carrier according to the attribute parameters of each carrier.
  • the compression ratio simultaneously performs power compression for each carrier, thus achieving power compression in the case of multiple carriers.
  • FIG. 1 is a schematic diagram of an embodiment of a power control method according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of another embodiment of a power control method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of still another embodiment of a power control method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of still another embodiment of a power control method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of an embodiment of a power control apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of another embodiment of a power control device according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of still another embodiment of a power control device according to an embodiment of the present invention.
  • Embodiments of the present invention provide a power control method and apparatus for implementing UE transmit power control in a multi-carrier mode.
  • an embodiment of a power control method in an embodiment of the present invention includes:
  • the UE when the UE uses the multi-carrier HSUPA scheme, the UE may be in multiple The data is simultaneously transmitted on the wave, and the power control device can acquire the data to be transmitted of the UE on each carrier.
  • the power control device in this embodiment can be implemented in the UE.
  • the specific UE's transmit power includes the estimated transmit power required by the UE to transmit the data to be transmitted on each carrier and the power of other uplink channels of the UE.
  • the power control device can obtain the data to be sent on each carrier, and calculate the estimated transmit power required for transmitting the data to be sent.
  • the specific calculation process is common knowledge of those skilled in the art, and is not limited herein. .
  • the UE may send the data to be transmitted on each carrier through the data channel.
  • the data channel may be an E-DPCH Dedicated Physical Data Channel (E-DPCH).
  • E-DPCH E-DPCH Dedicated Physical Data Channel
  • other uplink channels of the UE except the data channel may include: a Dedicated Physical Control Channel (DPCCH), a Dedicated Physical Data Channel (DPDCH), and an enhanced dedicated physical control channel.
  • DPCCH Dedicated Physical Control Channel
  • DPDCH Dedicated Physical Data Channel
  • E-DPCCH E-DCH Dedicated Physical Control Channel
  • channels such as HS-DPCCH (Dedicated Physical Control Channel uplink for HS-DSCH), and the process of acquiring power of these channels is known to those skilled in the art. Common knowledge is not limited herein.
  • step 102 Determine whether the transmit power of the UE exceeds a preset maximum transmit power. If yes, execute step 104. If no, go to step 103.
  • the maximum transmit power of the UE is specified in the related protocol of the WCDMA, and the maximum transmit power may be determined by two parameters: a maximum output power corresponding to the power level of the UE and a maximum allowable uplink power configured in the network where the UE is currently located, The maximum transmit power takes the smaller of the maximum output power and the maximum allowable uplink power.
  • the UE may directly send the data to be sent of each carrier, and the process of sending is common knowledge of those skilled in the art, which is not limited herein.
  • the specific power compression mode in this embodiment is: performing step-by-step power compression on each carrier according to the attribute parameters of each carrier, that is, performing power compression on each carrier one by one according to the order of the attribute parameters, and performing power compression on each carrier. And determining whether the transmit power meets the maximum transmit power limit (that is, whether the compressed transmit power is less than or equal to the maximum transmit power), and if yes, stopping compression and transmitting the to-be-sent data on each carrier.
  • the specific attribute parameters may include: an enhanced dedicated channel transmission format combination indicator (E-TFCI, E-DCH Transport Format Combination Indicator), a SG (Serving Grant) parameter or a DPCCH power, or may be other types of The attribute parameters are not limited here.
  • E-TFCI enhanced dedicated channel transmission format combination indicator
  • E-DCH Transport Format Combination Indicator E-DCH Transport Format Combination Indicator
  • SG Serving Grant
  • the stepwise power compression may be performed on each carrier according to the attribute parameters of each carrier, that is, according to the attributes of each carrier. Since the parameters are different, the power is compressed one by one for each carrier. Therefore, each carrier can be power-compressed one by one in the order of the attribute parameters, so that power compression in the case of multiple carriers is realized.
  • FIG. 2 another embodiment of the power control method in the embodiment of the present invention includes:
  • the process of calculating the transmit power of the UE in this embodiment is consistent with the process of calculating the transmit power of the UE in the foregoing step 101, and is not further described herein.
  • step 202 Determine whether the transmit power of the UE exceeds a preset maximum transmit power. If yes, go to step 204. If no, go to step 203.
  • the UE may send data to be sent for each carrier.
  • the process of sending is common knowledge of those skilled in the art, and is not limited herein.
  • the UE's transmit power is greater than the maximum transmit power, the UE needs to perform power compression before data transmission.
  • the specific power compression mode in this embodiment is: performing step-by-step power compression on each carrier according to the attribute parameters of each carrier, that is, performing power compression on each carrier one by one according to the order of the attribute parameters.
  • the attribute parameter in this embodiment may be an E-TFCI, and the E-TFCI may represent data to be sent.
  • the transport block is long.
  • the attribute parameter in this embodiment may also be DPCCH power.
  • the attribute parameter in this embodiment may also be an SG parameter.
  • each carrier corresponds to one SG parameter, and the UE may update the SG according to parameters sent by the network side.
  • the SG parameter is used to limit the UE to perform enhanced dedicated channel transmission format combination (E-TFC, E-DCH)
  • the Transport Format Combination Select the maximum power allowed.
  • the SG parameters can be composed of a list including the index number and the gain factor (ie the corresponding real power offset).
  • the first carrier in this embodiment may be the carrier where the E-TFCI is the largest data to be transmitted, or the carrier with the largest SG parameter, or the carrier with the smallest E-TFCI data to be transmitted, or It is the carrier with the smallest SG parameter, or the carrier with the highest DPCCH power, or the carrier with the lowest DPCCH power.
  • attribute parameters may also be other types of attribute parameters, which are not limited herein.
  • the power compression mode of the first carrier may be: compressing all the E-DPDCH gain factors on the first carrier, and the specific power compression manner is the same as the power compression method for the single carrier in the prior art.
  • the common knowledge of those skilled in the art is not limited herein.
  • various attribute parameters can be used to sequentially compress each carrier, so that the flexibility of the compression process can be improved.
  • step 205 Determine whether the transmit power after the power compression meets the maximum transmit power limit (ie, whether the compressed transmit power is less than or equal to the maximum transmit power). If yes, go to step 203. If no, go to step 206.
  • step 206 Continue to perform power compression on the next carrier according to the attribute parameter sequence, and repeat step 205 until the maximum transmit power of the UE is met.
  • power compression may be continued on other carriers in the order of the sequential parameters, and power compression is performed on each carrier. After that, it is judged whether the transmission power meets the maximum transmission power limit. If it is satisfied, the compression is stopped, and step 203 is performed. If not, the compression is continued.
  • the carrier where each data to be transmitted is located may be power-compressed according to the order of the E-TFCI from large to small. If the first carrier is the carrier of the to-be-transmitted data with the smallest E-TFCI, the carrier where each data to be transmitted is located may be power-compressed in the order of E-TFCI from small to large.
  • the carrier where the data to be transmitted is located may be compressed according to the order of the SG parameters.
  • the carrier where the data to be transmitted is located may be compressed according to the order of the SG parameters from small to large.
  • the carrier where each data to be transmitted is located may be power-compressed in descending order of DPCCH power.
  • the carrier where each data to be transmitted is located may be power-compressed in descending order of DPCCH power.
  • the manner of power compression for each carrier in this embodiment is the same as the manner of power compression for the first carrier, and is common knowledge of those skilled in the art.
  • the stepwise power compression may be performed on each carrier according to the attribute parameter of each carrier, that is, according to different attribute parameters of each carrier, each carrier is used. Power compression is performed one by one. Therefore, the solution adopted in this embodiment can perform power compression on each carrier one by one according to the order of the attribute parameters, thereby realizing power compression in the case of multiple carriers.
  • the E-TFCI can be used as the attribute parameter, and the carrier with the largest E-TFCI data to be transmitted can be firstly compressed, and the transmission power required for the data with a larger transmission block length is larger. Performing power compression on the carrier where the E-TFCI has the largest data to be transmitted can make the compressed transmit power easily satisfy the maximum transmit power limit, thereby ensuring the transmission performance of data with a small transmission block length.
  • the E-TFCI can be used as the attribute parameter, and the carrier with the smallest E-TFCI data to be transmitted can be firstly compressed, so that the transmit data with a larger transmission block length can obtain more transmit power. Therefore, the loss of data throughput can be reduced to some extent.
  • the second carrier may be subjected to power compression according to the above sequence. It can be understood that after power compression on the second carrier, power compression can be released on the first carrier, that is, the E-DPDCH gain factor of the first carrier is restored to the value before the compression of the first carrier. Perform power compression on the second carrier; determine whether the transmit power meets the maximum transmit power limit; if the maximum transmit power limit is not met, power compression may be performed on other carriers in this manner. Therefore, with this solution, fewer carriers can be compressed as much as possible, and the impact of power compression on data transmission can be minimized.
  • the E-TFCI of the data is power-compressed in order from small to large.
  • the maximum transmit power is 30 dBm
  • the transmit power of the UE is 33 dBm.
  • the transmit power is 31 dBm.
  • the transmit power is 29 dBm, and the specific power compression process can be:
  • the first carrier is subjected to power compression, and the compressed transmission power is 31 dBm. If the maximum transmission power is still exceeded, the second carrier is subjected to power compression. In order to minimize the number of carriers for power compression, the first carrier may be used. The power transmission is released, and the UE's transmit power is still 33 dBm before the second carrier is subjected to power compression. After the second carrier is separately compressed, the transmit power is 29 dBm, which satisfies the maximum transmit power limit, so only The second carrier can perform power compression.
  • the transmit power can satisfy the maximum transmit power limit. If the second carrier is separately power-compressed in practical applications, If the transmit power cannot meet the maximum transmit power limit, then the first carrier that has been de-powered must be re-power compressed, for example:
  • the maximum transmit power is 30 dBm, and the transmit power of the UE is 33 dBm. After power compression on the first carrier alone, the transmit power is 32 dBm. After power compression on the second carrier alone, the transmit power is 31 dBm.
  • the second carrier is subjected to power compression.
  • the first carrier may be used. If the power compression is performed, the UE's transmit power is still 33 dBm before the second carrier is power-compressed. After the second carrier is separately compressed, the transmit power is 31 dBm, and the maximum transmit power limit cannot be met.
  • the first carrier is again subjected to power compression, that is, the first carrier and the second carrier are both subjected to power compression. In this embodiment, as few carriers as possible are selected for power compression, thereby ensuring that data to be transmitted on most carriers is not affected, and data transmission performance is improved.
  • an additional compression process is performed, so that the final compression is performed.
  • the subsequent transmit power is less than or equal to the maximum transmit power.
  • the specific extra compression process may be: directly compressing the transmit power of each carrier according to the difference between the transmit power and the maximum transmit power, so that the total transmit power after compression is less than or The additional compression is equal to the maximum transmission power.
  • the additional compression in this embodiment may be performed on all carriers in the same ratio, or may be compressed in different ratios on different carriers.
  • the specific compression mode is not limited herein.
  • power compression compresses only the gain factor of the E-DPDCH channel, while additional compression directly compresses the transmit power.
  • the power ratio between the DPCCH and the E-DPDCH is not the ratio before the power compression, but the E-DPDCH after the compression reaches the minimum value that can be compressed by the protocol, and the process of the additional compression needs to be maintained.
  • the power ratio of the minimum to which DPCCH and E-DPDCH are compressed does not change.
  • a further embodiment of the power control method in the embodiment of the present invention includes: 301. Calculate a transmit power of the UE.
  • the process of calculating the transmit power of the UE in this embodiment is consistent with the process of calculating the transmit power of the UE in the foregoing step 201, and is not further described herein.
  • step 302. Determine whether the transmit power of the UE exceeds a preset maximum transmit power. If yes, go to step 304. If no, go to step 303.
  • the UE may directly send the data to be sent of each carrier, and the process of sending is common knowledge of those skilled in the art, which is not limited herein.
  • the UE's transmit power is greater than the maximum transmit power, the UE needs to perform power compression before data transmission.
  • the specific power compression mode in this embodiment is: performing synchronous power compression on each carrier according to a preset compression ratio, that is, performing power compression on all carriers simultaneously, and the compression ratio of power compression of each carrier may be the same or different. After power compression is performed on all carriers, it is judged whether the transmission power meets the maximum transmission power limit. If yes, the data to be transmitted on each carrier is transmitted.
  • the synchronous power compression may be performed on each carrier according to a preset compression ratio, that is, power compression is performed on all carriers at the same time, so each carrier can be Power compression is performed at the same time, so power compression in the case of multi-carrier is achieved.
  • FIG. 4 another embodiment of the power control method in the embodiment of the present invention includes:
  • the process of calculating the transmit power of the UE in this embodiment is consistent with the process of calculating the transmit power of the UE in the foregoing step 301, and is not further described herein.
  • step 402. Determine whether the transmit power of the UE exceeds a preset maximum transmit power. If yes, go to step 404. If no, go to step 403.
  • the UE may directly directly apply to each carrier.
  • the process of sending data to be sent is generally known in the art, and is not limited herein.
  • the UE's transmit power is greater than the maximum transmit power, the UE needs to perform power compression before data transmission.
  • the specific power compression mode in this embodiment is: performing synchronous power compression on each carrier according to a preset compression ratio, that is, performing power compression on all carriers simultaneously.
  • the compression ratio of the power compression of each carrier is related to its own attribute parameter, and the specific attribute parameter may be E-TFCI, or SG parameter, or DPCCH power.
  • attribute parameters may also be other types of attribute parameters, which are not limited herein.
  • the ratio between the attribute parameters of each carrier can be calculated.
  • the compression ratio of each carrier for power compression is proportional to the attribute parameter, that is, the larger the attribute parameter, the higher the compression ratio; or the power of each carrier.
  • the compressed compression ratio can also be inversely proportional to the attribute parameters, ie: The smaller the attribute parameter, the higher the compression ratio.
  • the compression ratio of each carrier for power compression is inversely proportional to the attribute parameter, that is, the smaller the attribute parameter, the higher the compression ratio, or the compression ratio of each carrier for power compression can also be compared with the attribute parameter. Proportional, that is, the larger the attribute parameter, the higher the compression ratio.
  • the compression ratio is related to the attribute parameters of each carrier. It can be understood that, in other embodiments of the present invention, the compression ratio of the power compression of each carrier may also be independent of each
  • the attribute parameter of the carrier is directly adopted by a preset identical value, that is, all carriers use the same value as the compression ratio at the time of power compression.
  • the above determines the specific compression ratio, and combines the difference between the transmission power and the maximum transmission power to determine the specific value of the compression, and then the power compression can be performed for each carrier.
  • the specific power compression is to simultaneously compress the E-DPDCH gain factor of each carrier.
  • the specific power compression manner is the same as the power compression method for the single carrier in the prior art, and is common knowledge of those skilled in the art. There is no limit.
  • the synchronous power compression may be performed on each carrier according to a preset compression ratio, that is, power compression is performed on all carriers at the same time. Therefore, with the solution of this embodiment, power compression can be simultaneously performed on each carrier, and power compression in the case of multiple carriers can be realized.
  • an additional compression process may be performed, so that finally The compressed transmit power is less than or equal to the maximum transmit power, and the specific additional compression process is consistent with the additional compression process described in the foregoing embodiment shown in FIG. 2, and details are not described herein again.
  • an embodiment of the power control device of the present invention includes:
  • a first calculating unit 501 configured to calculate a transmit power of the UE
  • the first check unit 502 is configured to determine whether the transmit power of the UE calculated by the first calculating unit 501 exceeds a preset maximum transmit power
  • the step-by-step compression unit 503 is configured to perform step-by-step power compression on the carriers according to the attribute parameters of the carriers when the transmit power of the UE exceeds a preset maximum transmit power.
  • the method for calculating the transmit power of the UE by the first calculating unit 501 can be referred to the embodiment of the power control method shown in FIG. 1.
  • the attribute parameter in this embodiment may be E-TFCI, SG parameter or DPCCH power, or may be other types of attribute parameters, which are not limited herein.
  • the step compression unit 503 may perform stepwise power compression on each carrier according to the attribute parameter of each carrier, that is, according to: Each carrier has power compression one by one for each carrier's attribute parameter. Therefore, with the power control apparatus provided in this embodiment, each carrier can be power-compressed one by one according to the order of the attribute parameters, and power compression in the case of multi-carrier is realized.
  • Another embodiment of the power control apparatus of the present invention includes:
  • a first calculating unit 601, configured to calculate a transmit power of the UE
  • the first check unit 602 is configured to determine whether the transmit power of the UE calculated by the first calculating unit 601 exceeds a preset maximum transmit power
  • the step-by-step compression unit 603 is configured to perform step-by-step power compression on the carriers according to the attribute parameters of the carriers when the transmit power of the UE exceeds a preset maximum transmit power.
  • the step compression unit 603 includes at least one of the following units:
  • the first step-by-step compression unit 6031 is configured to perform power compression on the first carrier, where the first carrier is a carrier where the data to be transmitted with the largest transmission block length is located, and it is determined whether the transmission power meets the maximum transmit power limit, and if not, Then performing power compression on the next carrier in descending order of the length of the transport block;
  • the second step-by-step compression unit 6032 is configured to perform power compression on the first carrier, where the first carrier is a carrier where the data to be transmitted with the smallest transmission block length is located, and it is determined whether the transmission power meets the maximum transmission power limit, and if not, The power is compressed on the next carrier in the order of the transmission block length from small to large;
  • the third step compression unit 6033 is configured to perform power compression on the first carrier, where the first carrier is a carrier with the largest service authorization parameter, and determines whether the transmit power meets the maximum transmit power limit. If not, the service authorization parameter is used. Power compression is performed on the next carrier in the order of 'j'; the fourth step compression unit 6034 is configured to perform power compression on the first carrier, where the first carrier is the carrier with the smallest service authorization parameter, and the transmit power is determined.
  • the fifth step compression unit 6035 is configured to perform power compression on the first carrier,
  • the first carrier is a carrier with the highest power of the dedicated physical control channel, and determines whether the transmit power meets the maximum transmit power limit. If not, the power is compressed according to the next carrier in the order of the dedicated physical control channel power from large to small;
  • the sixth step-by-step compression unit 6036 is configured to perform power compression on the first carrier, where the first carrier is a carrier with the lowest power of the dedicated physical control channel, and determine whether the transmit power meets the maximum transmit power limit, and if not, according to the dedicated The physical control channel power is power compressed from the next carrier in ascending order.
  • the manner in which the power compression is performed by each unit in the step-by-step compression unit 603 is similar to the power compression method described in the foregoing method embodiments in FIG. 1 and FIG. 2, and details are not described herein again.
  • the power control apparatus in this embodiment may further include: an extra compression execution unit 604, configured to trigger an additional compression execution when the transmit power of the step compression unit 603 after performing power compression on all carriers still fails to meet the maximum transmit power limit. Unit 604 performs additional compression.
  • the extra compression execution unit 604 can continue the additional compression process, thereby effectively ensuring power control under multiple carriers. achieve.
  • the power control apparatus in this embodiment may further include: a compression recovery unit 605, configured to cancel power compression of the previous carrier when the step compression unit performs power compression on the next carrier.
  • the specific decompression power compression may be: restoring the E-DPDCH gain factor of the first carrier to the E-DPDCH gain factor of the first carrier before performing power compression on the first carrier.
  • the step compression unit 603 may perform stepwise power compression on each carrier according to the attribute parameter of each carrier, that is, according to: Each carrier has power compression one by one for each carrier's attribute parameter. Therefore, with the power control apparatus provided in this embodiment, each carrier can be power-compressed one by one according to the order of the attribute parameters, and power compression in the case of multi-carrier is realized.
  • another embodiment of the power control apparatus in the embodiment of the present invention includes:
  • a second calculating unit 701, configured to calculate a transmit power of the UE
  • a second check unit 702 configured to determine, according to the second calculation unit 701, whether a transmit power of the UE exceeds a preset maximum transmit power
  • the synchronization compression unit 703 is configured to perform synchronous power compression on the carriers according to a preset compression ratio when the transmit power of the UE exceeds a preset maximum transmit power.
  • the preset compression ratio is a preset ratio or a ratio between attribute parameters of each carrier.
  • the power control apparatus in this embodiment may further include: an additional compression execution unit 704,
  • the additional compression execution unit 704 is triggered to perform additional compression when the transmission power after the synchronization compression unit 703 performs power compression on all carriers still fails to satisfy the maximum transmission power limit.
  • the synchronization compression unit 703 may perform synchronous power compression on each carrier according to a preset compression ratio, that is, simultaneously The carriers are all power compressed. Therefore, with the power control apparatus provided in this embodiment, power compression can be simultaneously performed on each carrier, and power compression in the case of multi-carrier is realized.
  • the transmission power still cannot satisfy the maximum transmission power limit, and the extra compression execution unit 704 can continue the additional compression process, thereby effectively ensuring multi-carrier operation. Power control is achieved.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD, etc.

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Description

一种功率控制方法及装置
技术领域
本发明实施例涉及通信领域, 尤其涉及一种功率控制方法及装置。
背景技术
随着通信技术的飞速发展, 宽带码分多址( WCDMA, Wideband Code
Division Multiple Access )作为第三代移动通信系统的主流技术之一 , 在全球 范围内得到了广泛的研究和应用, 目前的 WCDMA已经有第 99版本 ( R99, Release99 ) 、 第 4版本(R4, Release4 ) 、 第 5版本 ( R5, Release5 ) 、 第 6版 本(R6, Release6 ) 、 第 7版本(R7, Release7 )等版本。
为了提高数据传输速率,满足不同的需求, WCDMA在 R6版本中引入了高 速上行分组接入( HSUPA, High Speed Uplink Packet Access )技术, 从而提高 了上行链路的传输速度, 目前的 HSUPA技术都是承载在单个频点上的, 即单 载波数据发送。
在 WCDMA的相关协议中规定了用户设备(UE, User Equipment )的最大 发射功率, UE需要保持实际的上行发射功率等于或低于所指示的最大发射功 率。
为控制 UE实际的上行发射功率, 现有技术中一种功率控制方法为: 计算 UE发送单载波上的待发送数据所需的发射功率, 若计算得到的发射功率与其 他的上行信道的功率之和(即 UE的发射功率)超过了最大发射功率时, 则对 该载波进行功率压缩, 使得 UE的发射功率小于或等于最大发射功率。
为进一步提高 HSUPA系统的数据传输速率, 在 WCDMA的 R9版本中引入 了上行双载波(DC-HSUPA, Dual Cell HSUPA )技术, 该技术方案可以同时 利用两个上行载波发送数据, 从而提高了上行数据的传输速率。 当然, 随着技 术的发展, 未来还可能在上行引入更多载波。
因此, 需要对 UE上行的多个载波的功率控制进行配置。
发明内容
本发明实施例提供了一种功率控制方法及装置,能够实现在多载波模式下 的 UE发射功率控制。
本发明实施例提供的功率控制方法, 包括: 当用户设备通过多个载波发送 数据时,计算所述用户设备的发射功率; 当所述用户设备的发射功率超过预置 的最大发射功率时;根据各个载波的属性参数对所述各个载波进行分步功率压 缩或者按照压缩比例对所述各个载波进行同步功率压缩。
本发明实施例提供的功率控制装置, 包括: 第一计算单元, 用于计算用户 设备的发射功率; 第一校验单元, 用于判断所述第一计算单元计算得到的用户 设备的发射功率是否超过预置的最大发射功率; 所述功率控制装置还包括: 分 步压缩单元, 用于当所述用户设备的发射功率超过预置的最大发射功率时,按 照所述各载波的属性参数对所述各载波进行分步功率压缩; 或者, 同步压缩单 元, 用于当所述用户设备的发射功率超过预置的最大发射功率时,按照压缩比 例对所述各载波进行同步功率压缩。
从上述技术方案中可以看出, 本发明实施例具有如下优点:
本发明实施例的一个方案中, 当 UE使用多载波发送数据时, 在 UE的发射 功率大于预置的最大发射功率时,可以按照各载波的属性参数对各载波进行分 步功率压缩或^据压缩比例对各载波同时进行功率压缩,因此实现了在多载波 情况下的功率压缩。
附图说明
图 1为本发明实施例中功率控制方法一个实施例示意图;
图 2为本发明实施例中功率控制方法另一实施例示意图;
图 3为本发明实施例中功率控制方法再一实施例示意图;
图 4为本发明实施例中功率控制方法又一实施例示意图;
图 5为本发明实施例中功率控制装置一个实施例示意图;
图 6为本发明实施例中功率控制装置另一实施例示意图;
图 7为本发明实施例中功率控制装置再一实施例示意图。
具体实施方式
本发明实施例提供了一种功率控制方法及装置,用于实现在多载波模式下 的 UE发射功率控制。
请参阅图 1, 本发明实施例中功率控制方法一个实施例包括:
101、 计算 UE的发射功率。
本实施例中, 当 UE使用多载波的 HSUPA方案时, 则 UE可以在多个载 波上同时发送数据, 功率控制装置可以获取 UE在各载波上的待发送数据, 本 实施例中的功率控制装置可以集成在 UE中实现。
具体的 UE的发射功率包括 UE发送各载波上的待发送数据总共所需的预 估发射功率以及该 UE的其他上行信道的功率。
本实施例中功率控制装置可以获取各载波上的待发送数据,并计算发送这 些待发送数据总共所需的预估发射功率,具体的计算过程为本领域技术人员的 公知常识, 此处不作限定。
UE可以通过数据信道发送各载波上的待发送数据, 本实施例中, 该数据 信道可以为增强专用物理数据信道( E-DPDCH, E-DCH Dedicated Physical Data Channel )。 需要说明的是, UE 中除该数据信道外的其他上行信道可以包括: 专用物理控制信道( DPCCH, Dedicated Physical Control Channel )、 专用物理 数据信道( DPDCH, Dedicated Physical Data Channel )、 增强专用物理控制信 道(E-DPCCH, E-DCH Dedicated Physical Control Channel ), 高速专用物理控 制信道( HS-DPCCH , Dedicated Physical Control Channel uplink for HS-DSCH ) 等信道,具体这些信道的功率的获取过程为本领域技术人员所公知的常识,此 处不作限定。
102、 判断 UE的发射功率是否超过预置的最大发射功率, 若是, 则执行 步骤 104, 若否, 则执行步骤 103。
在 WCDMA的相关协议中规定了 UE的最大发射功率, 该最大发射功率 可以由两个参数决定: UE的功率等级对应的最大输出功率以及 UE当前所处 的网络中配置的最大允许上行功率,该最大发射功率取最大输出功率以及最大 允许上行功率中较小的数值。
103、 发送待发送数据并结束本流程。
若 UE的发射功率小于或等于最大发射功率, 则 UE可以直接对各载波的 待发送数据进行发送,发送的过程为本领域技术人员的公知常识,此处不作限 定。
104、 按照各载波的属性参数对各载波进行分步功率压缩。
若 UE的发射功率大于最大发射功率, 则 UE需要先进行功率压缩之后才 能进行数据发送。 本实施例中具体的功率压缩方式为:按照各载波的属性参数对各载波进行 分步功率压缩, 即按照属性参数的顺序对各载波逐个进行功率压缩, 并在对每 个载波进行功率压缩之后, 判断发射功率是否满足最大发射功率限制(即压缩 后的发射功率是否小于或等于最大发射功率), 若满足, 则停止压缩并发送各 载波上的待发送数据。
具体的属性参数可以包括: 增强专用信道传输格式组合指示 (E-TFCI, E-DCH Transport Format Combination Indicator ),月良务授权 ( SG, Serving Grant ) 参数或 DPCCH功率, 或者还可以为其他类型的属性参数, 此处不作限定。
本实施例中, 当 UE使用多载波发送数据时, 若 UE的发射功率大于预置 的最大发射功率, 则可以按照各载波的属性参数对各载波进行分步功率压缩, 即根据各载波的属性参数的不同,对各载波逐个进行功率压缩, 因此能够按照 属性参数的顺序对各载波进行逐个进行功率压缩 ,所以实现了在多载波情况下 的功率压缩。
为便于理解, 下面以一具体实例对上述的功率控制方法进行伴细描述,请 参阅图 2, 本发明实施例中功率控制方法另一实施例包括:
201、 计算 UE的发射功率。
本实施例中计算 UE的发射功率的过程与前述步骤 101中计算 UE的发射 功率的过程一致, 此处不再赞述。
202、 判断 UE的发射功率是否超过预置的最大发射功率, 若是, 则执行 步骤 204, 若否, 则执行步骤 203。
203、 发送待发送数据并结束本流程。
若 UE的发射功率小于或等于最大发射功率, 则 UE可以对各载波的待发 送数据进行发送。 发送的过程为本领域技术人员的公知常识, 此处不作限定。
204、 对第一载波进行功率压缩。
若 UE的发射功率大于最大发射功率, 则 UE需要先进行功率压缩之后才 能进行数据发送。
本实施例中具体的功率压缩方式为:按照各载波的属性参数对各载波进行 分步功率压缩, 即按照属性参数的顺序对各载波进行逐个进行功率压缩。
本实施例中的属性参数可以为 E-TFCI,该 E-TFCI可以表示待发送数据的 传输块长。
本实施例中的属性参数还可以为 DPCCH功率。
本实施例中的属性参数还可以为 SG参数, 在多载波模式下, 每个载波对 应一个 SG参数, UE可以根据网络侧下发的参数对 SG进行更新。
该 SG参数用于限制 UE进行增强专用信道传输格式组合( E-TFC, E-DCH
Transport Format Combination )选择所允许的最大功率, 该 SG参数可以由一 个列表构成, 包括索引号和增益因子(即对应的真实的功率偏置)。
需要说明的是, 本实施例中的第一载波可以是 E-TFCI最大的待发送数据 所在的载波, 或者是 SG参数最大的载波, 或者是 E-TFCI最小的待发送数据 所在的载波, 或者是 SG参数最小的载波, 或者是 DPCCH功率最大的载波, 或者是 DPCCH功率最小的载波。
在实际应用中,具体的属性参数还可以是其他类型的属性参数,此处不作 限定。
具体的对第一载波的功率压缩方式可以为: 对第一载波上全部 E-DPDCH 增益因子进行压缩,具体的功率压缩的方式与现有技术中针对单载波的功率压 缩的方式相同, 为本领域技术人员的公知常识, 此处不作限定。
本实施例中可以采用多种属性参数对各载波进行顺序的压缩,所以能够提 高压缩过程的灵活性。
205、判断进行功率压缩之后的发射功率是否满足最大发射功率限制(即: 压缩后的发射功率是否小于或等于最大发射功率), 若是, 则执行步骤 203 , 若否, 则执行步骤 206。
206、 按照属性参数顺序继续对下一个载波进行功率压缩, 并重复步骤 205, 直到满足 UE的最大发射功率。
本实施例中, 若对第一载波进行功率压缩之后,发射功率仍然无法满足最 大发射功率限制 , 则可以按照顺序参数的顺序继续对其他的载波进行功率压 缩 ,并且在对每一个载波进行功率压缩之后均判断发射功率是否满足最大发射 功率限制, 若满足, 则停止压缩, 并执行步骤 203 , 若不满足, 则继续压缩。
本实施例中, 若第一载波为 E-TFCI最大的待发送数据所在的载波, 可以 按照 E-TFCI由大到小的顺序对各待发送数据所在的载波进行功率压缩。 若第一载波为 E-TFCI最小的待发送数据所在的载波, 可以按照 E-TFCI 由小到大的顺序对各待发送数据所在的载波进行功率压缩。
若第一载波为 SG参数最大的载波, 可以按照 SG参数由大到小的顺序对 各待发送数据所在的载波进行功率压缩。
若第一载波为 SG参数最小的载波, 可以按照 SG参数由小到大的顺序对 各待发送数据所在的载波进行功率压缩。
若第一载波为 DPCCH功率最大的载波, 可以按照 DPCCH功率由大到小 的顺序对各待发送数据所在的载波进行功率压缩。
若第一载波为 DPCCH功率最小的载波, 可以按照 DPCCH功率由小到大 的顺序对各待发送数据所在的载波进行功率压缩。
本实施例中对各载波的功率压缩的方式与前述对第一载波的功率压缩的 方式相同, 均为本领域人员的公知常识。
本实施例中, 在判断 UE的发射功率大于预置的最大发射功率之后, 可以 按照各载波的属性参数对各载波进行分步功率压缩, 即:根据各载波的属性参 数的不同, 对各载波逐个进行功率压缩。 因此, 本实施例采用的方案, 能够按 照属性参数的顺序对各载波逐个进行功率压缩,实现了在多载波情况下的功率 压缩。
本实施例中可以使用 E-TFCI作为属性参数, 可以先对 E-TFCI最大的待 发送数据所在的载波进行功率压缩,由于传输块长越大的数据所需的发射功率 也越大, 所以先对 E-TFCI最大的待发送数据所在的载波进行功率压缩可以使 得压缩后的发射功率容易满足最大发射功率限制,从而保证传输块长较小的数 据的发送性能。
本实施例中可以使用 E-TFCI作为属性参数, 还可以先对 E-TFCI最小的 待发送数据所在的载波进行功率压缩,则可以保证传输块长较大的待发送数据 获得更多的发射功率, 因此可以在一定程度上减小数据吞吐量的损失。
需要说明的是, 若对第一载波进行功率压缩之后,发射功率仍然无法满足 最大发射功率限制, 则可以按照上述顺序对第二载波进行功率压缩。可以理解 的是, 在对第二载波进行功率压缩之后, 可以对第一载波解除功率压缩, 即: 使得第一载波的 E-DPDCH增益因子恢复至对第一载波压缩前的数值,此时仅 对第二载波进行了功率压缩; 再判断发射功率是否满足最大发射功率限制; 如 果还不满足最大发射功率的限制, 可以按照该方式对其他的载波进行功率压 缩。 因此, 采用本该方案可以尽可能的对更少的载波进行压缩, 可以尽量减少 功率压缩对数据发送的影响。
为便于理解, 下面以一实例进行说明: 假设有两个载波, 分别为第一载波 以及第二载波, 这两个载波的待发送数据的 E-TFCI依次增大, 本实施例中按 照待发送数据的 E-TFCI由小到大的顺序依次对载波进行功率压缩, 最大发射 功率为 30dBm, 而 UE的发射功率为 33dBm, 单独对第一载波进行功率压缩 之后, 发射功率为 31dBm, 单独对第二载波进行功率压缩之后, 发射功率为 29dBm, 则具体的功率压缩过程可以为:
首先对第一载波进行功率压缩, 压缩后的发射功率为 31dBm, 仍超过最 大发射功率, 则对第二载波进行功率压缩,此时为了尽量减少进行功率压缩的 载波的数目,可以对第一载波解除功率压缩, 则在对第二载波进行功率压缩之 前, UE的发射功率仍为 33dBm, 在单独对第二载波进行功率压缩之后, 发射 功率为 29dBm, 满足了最大发射功率限制, 因此只需要对第二载波进行功率 压缩即可。
需要说明的是, 上述的例子中描述的是单独对第二载波进行功率压缩之 后, 发射功率即可满足最大发射功率限制的情况, 若在实际应用中, 单独对第 二载波进行功率压缩后,发射功率也无法满足最大发射功率限制, 那么还需要 对已经解除功率压缩的第一载波再次进行功率压缩, 例如:
最大发射功率为 30dBm, 而 UE的发射功率为 33dBm, 单独对第一载波 进行功率压缩之后, 发射功率为 32dBm, 单独对第二载波进行功率压缩之后, 发射功率为 31dBm。
首先对第一载波进行功率压缩, 压缩后的发射功率为 32dBm, 仍超过最 大发射功率, 则对第二载波进行功率压缩,此时为了尽量减少进行功率压缩的 载波的数目,可以对第一载波解除功率压缩, 则在对第二载波进行功率压缩之 前, UE的发射功率为仍为 33dBm, 在单独对第二载波进行功率压缩之后, 发 射功率为 31dBm, 也无法满足最大发射功率限制, 所以此时再次对第一载波 进行功率压缩, 即第一载波以及第二载波都进行功率压缩。 本实施例中选择尽可能少的载波进行功率压缩,从而保证了大部分载波上 的待发送数据不受影响 , 提高了数据发送性能。
本实施例中, 若对各载波均进行了功率压缩之后,发射功率仍然无法满足 最大发射功率限制(即全部载波压缩之后的发射功率仍然大于最大发射功率 ), 则执行额外压缩过程, 使得最终压缩后的发射功率小于或等于最大发射功率, 具体的额外压缩的过程可以为:按照发射功率与最大发射功率之间的差距直接 对各载波的发射功率进行压缩,使得压缩后的总发射功率小于或等于最大发射 功率,本实施例中的额外压缩可以对所有的载波按照相同的比例进行压缩,也 可以对不同的载波采用不同的比例进行压缩 , 具体额外压缩方式此处不作限 定。
需要说明的是, 本实施例中的额外压缩与功率压缩并不相同。
首先, 功率压缩是仅对 E-DPDCH信道的增益因子进行压缩, 而额外压缩 是直接对发射功率进行压缩。
其次, 在额外压缩的过程中, 需要保持 DPCCH和 DPDCH之间原有的功 率比例不变, 保持 DPCCH和 HS-DPCCH之间原有的功率比例不变, 保持 DPCCH和 E-DPCCH之间原有的功率比例不变,以及保持 DPCCH与 E-DPDCH 之间的功率比例不变, 即对各信道都是按原有的增益因子共同进行压缩。
需要说明的是, DPCCH与 E-DPDCH之间的功率比例并不是在进行功率 压缩前的比例 ,而是压缩之后 E-DPDCH达到协议规定的能被压缩到的最小值 , 额外压缩的过程需要保持 DPCCH和 E-DPDCH压缩到的最小值的功率比例不 变。
本实施例中额外压缩的详细过程为本领域技术人员的公知常识,此处不作 限定。
本实施例中在对所有的载波均执行功率压缩之后,若 UE的发射功率仍无 法满足最大发射功率限制, 则可以继续进行额外压缩过程,从而有效地保证多 载波下的功率控制得以实现。
上面对本发明实施例中的功率控制方法进行了介绍,上述的实施例中描述 的是对各载波进行分步功率压缩的方案,下面介绍对各载波进行同步功率压缩 的方案, 请参阅图 3, 本发明实施例中功率控制方法再一实施例包括: 301、 计算 UE的发射功率。
本实施例中计算 UE的发射功率的过程与前述步骤 201中计算 UE的发射 功率的过程一致, 此处不再赞述。
302、 判断 UE的发射功率是否超过预置的最大发射功率, 若是, 则执行 步骤 304, 若否, 则执行步骤 303。
303、 发送待发送数据并结束本流程。
若 UE的发射功率小于或等于最大发射功率, 则 UE可以直接对各载波的 待发送数据进行发送,发送的过程为本领域技术人员的公知常识,此处不作限 定。
304、 按照预置的压缩比例对各载波进行同步功率压缩。
若 UE的发射功率大于最大发射功率, 则 UE需要先进行功率压缩之后才 能进行数据发送。
本实施例中具体的功率压缩方式为:按照预置的压缩比例对各载波进行同 步功率压缩, 即对所有的载波都同时进行功率压缩,每个载波的功率压缩的压 缩比例可以相同也可以不同,再对所有载波都进行功率压缩之后, 判断发射功 率是否满足最大发射功率限制, 若满足, 则发送各载波上的待发送数据。
本实施例中, 在 UE的发射功率大于预置的最大发射功率之后, 可以按照 预置的压缩比例对各载波进行同步功率压缩 ,即同时对所有的载波都进行功率 压缩, 因此能够对各载波同时进行功率压缩, 所以实现了多载波情况下的功率 压缩。
为便于理解, 下面以一具体实例对上述的功率控制方法进行伴细描述,请 参阅图 4, 本发明实施例中功率控制方法又一实施例包括:
401、 计算 UE的发射功率。
本实施例中计算 UE的发射功率的过程与前述步骤 301中计算 UE的发射 功率的过程一致, 此处不再赞述。
402、 判断 UE的发射功率是否超过预置的最大发射功率, 若是, 则执行 步骤 404, 若否, 则执行步骤 403。
403、 发送待发送数据并结束本流程。
若 UE的发射功率小于或等于最大发射功率, 则 UE可以直接对各载波的 待发送数据进行发送,发送的过程为本领域技术人员的公知常识,此处不作限 定。
404、 按照各载波属性参数之间的比例对各载波同时进行功率压缩。
若 UE的发射功率大于最大发射功率, 则 UE需要先进行功率压缩之后才 能进行数据发送。
本实施例中具体的功率压缩方式为:按照预置的压缩比例对各载波进行同 步功率压缩, 即对所有的载波都同时进行功率压缩。
本实施例中, 每个载波的功率压缩的压缩比例和其自身的属性参数相关, 具体的属性参数可以为 E-TFCI, 或者 SG参数, 或者是 DPCCH功率。
在实际应用中,具体的属性参数还可以是其他类型的属性参数,此处不作 限定。
当获取到各载波的属性参数之后 , 即可计算各载波的属性参数之间的比 例。
需要说明的是, 若以 E-TFCI或者 SG参数作为属性参数, 则各载波进行 功率压缩的压缩比例与属性参数成正比,即:属性参数越大,则压缩比例越高; 或者各载波进行功率压缩的压缩比例也可以与属性参数成反比, 即: 属性参数 越小, 则压缩比例越高。
若以 DPCCH功率作为属性参数, 则各载波进行功率压缩的压缩比例与属 性参数成反比, 即属性参数越小, 则压缩比例越高, 或者各载波进行功率压缩 的压缩比例也可以与属性参数成正比, 即属性参数越大, 则压缩比例越高。
需要说明的是,上述步骤 404中描述的是压缩比例与各载波的属性参数相 关的方案, 可以理解的是, 本发明其他实施例中, 各载波的功率压缩的压缩比 例同样可以不依赖于各载波的属性参数, 而直接采用一预置的相同数值, 即所 有的载波均以该相同的数值作为功率压缩时的压缩比例。
上述确定了具体的压缩比例,再结合发射功率与最大发射功率之间的差距 确定压缩的具体数值, 则可以对各载波进行功率压缩。具体的功率压缩即是对 各载波的 E-DPDCH增益因子同时进行压缩,具体的功率压缩的方式与现有技 术中针对单载波的功率压缩的方式相同, 为本领域技术人员的公知常识,此处 不作限定。 本实施例中, 在确定 UE的发射功率大于预置的最大发射功率之后, 可以 按照预置的压缩比例对各载波进行同步功率压缩, 即: 同时对所有的载波都进 行功率压缩。 因此, 采用本实施例的方案能够对各载波同时进行功率压缩, 实 现了多载波情况下的功率压缩。
本实施例中, 若对各载波均进行了功率压缩之后,发射功率仍然无法满足 最大发射功率限制(即全部载波压缩之后的发射功率仍然大于最大发射功率 ), 则可以执行额外压缩过程,使得最终压缩后的发射功率小于或等于最大发射功 率,具体的额外压缩的过程与前述图 2所示的实施例中所描述的额外压缩过程 一致, 此处不再赘述。
本实施例中在对所有的载波均执行功率压缩之后,若发射功率仍无法满足 最大发射功率限制, 则可以继续进行额外压缩过程,从而有效地保证多载波下 的功率控制得以实现。
下面对本发明实施例中的功率控制装置进行描述, 请参阅图 5, 本发明功 率控制装置的一个实施例包括:
第一计算单元 501, 用于计算 UE的发射功率;
第一校验单元 502, 用于判断第一计算单元 501计算得到的 UE的发射功 率是否超过预置的最大发射功率;
分步压缩单元 503 , 用于当所述 UE的发射功率超过预置的最大发射功率 时 , 按照所述各载波的属性参数对所述各载波进行分步功率压缩。
其中, 第一计算单元 501计算 UE的发射功率的方法可以参见图 1所示的 功率控制方法的实施例。
本实施例中的属性参数可以为 E-TFCI, SG参数或 DPCCH功率, 或者还 可以为其他类型的属性参数, 此处不作限定。
本实施例中,在第一校验单元 502确定 UE的发射功率大于预置的最大发 射功率之后,分步压缩单元 503可以按照各载波的属性参数对各载波进行分步 功率压缩, 即: 根据各载波的属性参数的不同, 对各载波逐个进行功率压缩。 因此, 采用本实施例提供的功率控制装置, 能够按照属性参数的顺序对各载波 进行逐个进行功率压缩 , 实现了在多载波情况下的功率压缩。
为便于理解, 下面以一具体实例对上述功率控制装置进行说明,请参阅图 6, 本发明功率控制装置的另一实施例包括:
第一计算单元 601, 用于计算 UE的发射功率;
第一校验单元 602, 用于判断第一计算单元 601计算得到的 UE的发射功 率是否超过预置的最大发射功率;
分步压缩单元 603 , 用于当所述 UE的发射功率超过预置的最大发射功率 时, 按照所述各载波的属性参数对所述各载波进行分步功率压缩。
分步压缩单元 603包括如下单元中的至少一个:
第一分步压缩单元 6031, 用于对第一载波进行功率压缩, 所述第一载波 为传输块长最大的待发送数据所在的载波,判断发射功率是否满足最大发射功 率限制, 若不满足, 则按照传输块长由大到小的顺序对下一个载波进行功率压 缩;
第二分步压缩单元 6032, 用于对第一载波进行功率压缩, 所述第一载波 为传输块长最小的待发送数据所在的载波,判断发射功率是否满足最大发射功 率限制, 若不满足, 则按照传输块长由小到大的顺序对下一个载波进行功率压 缩;
第三分步压缩单元 6033, 用于对第一载波进行功率压缩, 所述第一载波 为服务授权参数最大的载波, 判断发射功率是否满足最大发射功率限制, 若不 满足, 则按照服务授权参数由大到 ' j、的顺序对下一个载波进行功率压缩; 第四分步压缩单元 6034, 用于对第一载波进行功率压缩, 所述第一载波 为服务授权参数最小的载波, 判断发射功率是否满足最大发射功率限制, 若不 满足, 则按照服务授权参数由小到大的顺序对下一个载波进行功率压缩; 第五分步压缩单元 6035, 用于对第一载波进行功率压缩, 所述第一载波 为专用物理控制信道功率最大的载波,判断发射功率是否满足最大发射功率限 制, 若不满足, 则按照专用物理控制信道功率由大到小的顺序下一个载波进行 功率压缩;
第六分步压缩单元 6036, 用于对第一载波进行功率压缩, 所述第一载波 为专用物理控制信道功率最小的载波,判断发射功率是否满足最大发射功率限 制, 若不满足, 则按照专用物理控制信道功率由小到大的顺序对下一个载波进 行功率压缩。 本实施例中, 分步压缩单元 603中各单元执行功率压缩的方式与前述图 1 以及图 2所示的方法实施例中描述的功率压缩的方式类似, 此处不再赘述。
本实施例中的功率控制装置还可以进一步包括: 额外压缩执行单元 604, 用于当分步压缩单元 603 对所有载波执行功率压缩之后的发射功率仍无法满 足最大发射功率限制, 则触发额外压缩执行单元 604执行额外压缩。
本实施例中,若对所有的载波均执行功率压缩之后的发射功率仍无法满足 最大发射功率限制, 则额外压缩执行单元 604可以继续进行额外压缩过程,从 而有效地保证多载波下的功率控制得以实现。
本实施例中的功率控制装置还可以进一步包括: 压缩恢复单元 605, 用于 当所述分步压缩单元对下一个载波进行功率压缩时,解除上一个载波的功率压 缩。
具体的解除功率压缩可以为:将第一载波的 E-DPDCH增益因子恢复至在 对第一载波进行功率压缩前, 第一载波的 E-DPDCH增益因子。
本实施例中,在第一校验单元 602确定 UE的发射功率大于预置的最大发 射功率之后,分步压缩单元 603可以按照各载波的属性参数对各载波进行分步 功率压缩, 即: 根据各载波的属性参数的不同, 对各载波逐个进行功率压缩。 因此, 采用本实施例提供的功率控制装置, 能够按照属性参数的顺序对各载波 进行逐个进行功率压缩 , 实现了在多载波情况下的功率压缩。
请参阅图 7, 本发明实施例中的功率控制装置再一实施例包括:
第二计算单元 701, 用于计算 UE的发射功率;
第二校验单元 702, 用于根据第二计算单元 701计算得到的 UE的发射功 率是否超过预置的最大发射功率;
同步压缩单元 703 , 用于当所述 UE的发射功率超过预置的最大发射功率 时, 按照预置的压缩比例对所述各载波进行同步功率压缩。
本实施例中 ,预置的压缩比例为预置的相同比例或各载波的属性参数之间 的比例。
需要说明的是,本实施例中同步压缩单元 703执行同步功率压缩的过程与 图 3或图 4中所描述的同步压缩过程一致, 此处不再赘述。
本实施例中的功率控制装置还可以进一步包括: 额外压缩执行单元 704, 用于当同步压缩单元 703 对所有载波执行功率压缩之后的发射功率仍无法满 足最大发射功率限制 , 则触发额外压缩执行单元 704执行额外压缩。
本实施例中,在第二校验单元 702确定 UE的发射功率大于预置的最大发 射功率之后,同步压缩单元 703可以按照预置的压缩比例对各载波进行同步功 率压缩, 即: 同时对所有的载波都进行功率压缩。 因此, 采用本实施例提供的 功率控制装置, 能够对各载波同时进行功率压缩, 实现了多载波情况下的功率 压缩。
本实施例中,在同步压缩单元 703对所有的载波均执行功率压缩之后的发 射功率仍无法满足最大发射功率限制,则额外压缩执行单元 704可以继续进行 额外压缩过程, 从而有效地保证多载波下的功率控制得以实现。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成,该程序可以存储于一计算机可读 存储介质中, 存储介质可以包括: ROM、 RAM, 磁盘或光盘等。
以上对本发明实施例所提供的功率控制方法及装置进行了详细介绍 ,本文 只是用于帮助理解本发明的方法及其核心思想; 同时,对于本领域的一般技术 人员, 依据本发明的思想, 在具体实施方式及应用范围上均会有改变之处, 综 上所述, 本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种功率控制方法, 其特征在于, 包括:
当用户设备通过多个载波发送数据时, 计算所述用户设备的发射功率; 当所述用户设备的发射功率超过预置的最大发射功率时;
根据各个载波的属性参数对所述各个载波进行分步功率压缩或者按照压 缩比例对所述各个载波进行同步功率压缩。
2、 根据权利要求 1所述的方法, 其特征在于, 所述根据各个载波的属性 参数对所述各个载波进行分步功率压缩包括:
对第一载波进行功率压缩,所述第一载波为传输块长最大的待发送数据所 在的载波;
如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的待发送数据的传输块长从大到小的顺序对下一个载波进 行功率压缩;
或者,所述根据各个载波的属性参数对所述各个载波进行分步功率压缩包 括:
对第一载波进行功率压缩,所述第一载波为传输块长最小的待发送数据所 在的载波;
如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的待发送数据的传输块长从小到大的顺序对下一个载波进 行功率压缩;
或者,所述根据各个载波的属性参数对所述各个载波进行分步功率压缩包 括:
对第一载波进行功率压缩, 所述第一载波为服务授权参数最大的载波; 如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的服务授权参数从大到小的顺序对下一个载波进行功率压 缩; 或者,所述根据各个载波的属性参数对所述各个载波进行分步功率压缩包 括:
对第一载波进行功率压缩, 所述第一载波为服务授权参数最小的载波; 如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的服务授权参数从小到大的顺序对下一个载波进行功率压 缩;
或者,所述根据各个载波的属性参数对所述各个载波进行分步功率压缩包 括:
对第一载波进行功率压缩,所述第一载波为专用物理控制信道功率最大的 载波;
如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的专用物理控制信道功率从大到小的顺序对下一个载波进 行功率压缩;
或者,所述根据各个载波的属性参数对所述各个载波进行分步功率压缩包 括:
对第一载波进行功率压缩 ,所述第一载波为专用物理控制信道功率最小的 载波;
如果对所述第一载波进行功率压缩后的发射功率不满足所述最大发射功 率限制;
根据各个载波的专用物理控制信道功率从小到大的顺序对下一个载波进 行功率压缩。
3、 根据权利要求 2所述的方法, 其特征在于, 还包括:
当对下一个载波进行功率压缩时, 解除上一个载波的功率压缩。
4、 根据权利要求 3所述的方法, 其特征在于, 所述解除上一个载波的功 率压缩包括:
将上一个载波的增强专用物理数据信道增益因子恢复至在对所述上一个 载波进行功率压缩前, 所述上一个载波的专用物理数据信道增益因子。
5、 根据权利要求 2所述的方法, 其特征在于, 若对所有的载波进行了功 率压缩之后的发射功率不满足最大发射功率限制, 则执行预置的额外压缩程 序。
6、 根据权利要求 1所述的方法, 其特征在于, 所述根据各个载波的属性 参数对所述各个载波进行分步功率压缩包括:
按照各载波的属性参数对所述各载波的增强专用物理数据信道增益因子 进行分步压缩。
7、 根据权利要求 1所述的方法, 其特征在于, 所述按照压缩比例对所述 各个载波进行同步功率压缩包括:
按照所述相同比例分别对每个载波的增强专用物理数据信道增益因子同 时进行压缩。
8、 根据权利要求 1所述的方法, 其特征在于, 所述按照压缩比例对所述 各个载波进行同步功率压缩包括:
按照各载波的属性参数之间的比例对每个载波的增强专用物理数据信道 增益因子同时进行压缩。
9、 根据权利要求 8所述的方法, 其特征在于, 所述各载波的属性参数之 间的比例包括:
各载波上的待发送数据的传输块长之间的比例,或各载波的专用物理控制 信道功率之间的比例 , 或各载波的服务授权参数之间的比例。
10、 一种功率控制装置, 其特征在于, 包括:
第一计算单元, 用于计算用户设备的发射功率;
第一校验单元 ,用于判断所述第一计算单元计算得到的用户设备的发射功 率是否超过预置的最大发射功率;
所述功率控制装置还包括:
分步压缩单元,用于当所述用户设备的发射功率超过预置的最大发射功率 时, 按照所述各载波的属性参数对所述各载波进行分步功率压缩;
或者,
同步压缩单元,用于当所述用户设备的发射功率超过预置的最大发射功率 时, 按照压缩比例对所述各载波进行同步功率压缩。
11、 根据权利要求 10所述的功率控制装置, 其特征在于, 所述分步压缩 单元包括如下单元中的至少一个:
第一分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为传输 块长最大的待发送数据所在的载波,如果对所述第一载波进行功率压缩后,发 射功率不满足最大发射功率限制 ,根据各个载波的待发送数据的传输块长从大 到小的顺序对下一个载波进行功率压缩;
第二分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为传输 块长最小的待发送数据所在的载波,如果对所述第一载波进行功率压缩后,发 射功率不满足最大发射功率限制 ,根据各个载波的待发送数据的传输块长从小 到大的顺序对下一个载波进行功率压缩;
第三分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为服务 授权参数最大的载波,如果对所述第一载波进行功率压缩后,发射功率不满足 最大发射功率限制,根据各个载波的服务授权参数从大到小的顺序对下一个载 波进行功率压缩;
第四分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为服务 授权参数最小的载波,如果对所述第一载波进行功率压缩后,发射功率不满足 最大发射功率限制 ,根据各个载波的服务授权参数从小到大的顺序对下一个载 波进行功率压缩;
第五分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为专用 物理控制信道功率最大的载波,如果对所述第一载波进行功率压缩后,发射功 率不满足最大发射功率限制,根据各个载波的专用物理控制信道功率从大到小 的顺序对下一个载波进行功率压缩;
第六分步压缩单元, 用于对第一载波进行功率压缩, 所述第一载波为专用 物理控制信道功率最小的载波,如果对所述第一载波进行功率压缩后,发射功 率不满足最大发射功率限制 ,根据各个载波的专用物理控制信道功率从小到大 的顺序对下一个载波进行功率压缩。
12、 根据权利要求 10所述的功率控制装置, 其特征在于, 所述功率控制 装置还包括:
压缩恢复单元, 用于当所述分步压缩单元对下一个载波进行功率压缩时, 解除上一个载波的功率压缩。
13、 根据权利要求 10所述的功率控制装置, 其特征在于, 所述压缩比例 为相同比例或各载波的属性参数之间的比例。
14、 根据权利要求 10所述的功率控制装置, 其特征在于, 所述功率控制 装置还包括:
额外压缩单元,用于当所述分步压缩单元或同步压缩单元对所有的载波均 执行功率压缩之后, 若发射功率仍未满足最大发射功率限制, 则执行额外压缩 程序。
PCT/CN2009/071484 2009-04-27 2009-04-27 一种功率控制方法及装置 Ceased WO2010124433A1 (zh)

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