WO2015018072A1 - Procédé de commande d'énergie, équipement utilisateur et station de base - Google Patents

Procédé de commande d'énergie, équipement utilisateur et station de base Download PDF

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Publication number
WO2015018072A1
WO2015018072A1 PCT/CN2013/081195 CN2013081195W WO2015018072A1 WO 2015018072 A1 WO2015018072 A1 WO 2015018072A1 CN 2013081195 W CN2013081195 W CN 2013081195W WO 2015018072 A1 WO2015018072 A1 WO 2015018072A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
value
reference signal
transmit power
base station
Prior art date
Application number
PCT/CN2013/081195
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English (en)
Chinese (zh)
Inventor
温伟高
李宏超
周华
Original Assignee
富士通株式会社
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
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2013/081195 priority Critical patent/WO2015018072A1/fr
Publication of WO2015018072A1 publication Critical patent/WO2015018072A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—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
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range

Definitions

  • the present invention relates to the field of communications, and in particular, to a power control method, a user equipment, and a base station for device to device (D2D) communication.
  • D2D device to device
  • D2D is a new technology for implementing end-to-end communication by reusing resources of macrocell users in a cell in a wireless communication system.
  • D2D communication technology can improve resource utilization, increase user data rate, and improve cell throughput and cell coverage by utilizing the geographically similar characteristics of two devices communicating.
  • the application of D2D technology in LTE communication systems is being studied in the LTE el.12 version.
  • D2D communication may be shared between different D2D user pairs in the same cell and between traditional cellular users.
  • D2D communication also has interference in the small area.
  • the prior art D2D communication does not consider the problem of intra-cell interference.
  • Embodiments of the present invention provide a power control method, a user equipment, and a base station.
  • the purpose is to control the power of the D2D communication user equipment.
  • a power control method is provided, which is applied to a communication system in which a user equipment performs device-to-device communication with other user equipments, where the power control method includes:
  • the user equipment measures a first interference value on the resource block
  • a power control method which is applied to a communication system in which a user equipment performs device-to-device communication with other user equipments, and the power control method includes:
  • the base station sends a second reference signal to the user equipment, so that the user equipment calculates a reference signal received power value according to the second reference signal;
  • the user equipment Receiving, by the user equipment, the reference signal received power value, and the first interference value and the first path loss value; wherein the first interference value is obtained by the user equipment measuring on a resource block, where The one-way loss value is calculated by the user equipment according to the first reference signal sent by the other user equipment.
  • a power control method which is applied to a communication system in which a user equipment performs device-to-device communication with other user equipments, and the power control method includes:
  • the user equipment measures a first interference value on the resource block
  • a power control method which is applied to a communication system in which a user equipment performs device-to-device communication with other user equipments, and the power control method includes:
  • a user equipment which performs device-to-device communication with other user equipments, where the user equipment includes:
  • An interference value measuring unit that measures a first interference value on the resource block
  • the road loss value calculation unit receives the first reference signal sent by the other user equipment, and calculates a first path loss value between the user equipment and the other user equipment according to the first reference signal;
  • a transmit power obtaining unit configured to obtain, according to the first interference value and the first path loss value, a transmit power of the user equipment.
  • a base station which provides a service for a user equipment that performs device-to-device communication with other user equipments, where the base station includes:
  • the reference signal sending unit sends a second reference signal to the user equipment, so that the user equipment calculates a reference signal received power value according to the second reference signal;
  • the information receiving unit receives the reference signal received power value sent by the user equipment, and the first interference value and the first path loss value; wherein the first interference value is obtained by the user equipment measuring on the resource block
  • the first path loss value is calculated by the user equipment according to the first reference signal sent by the other user equipment.
  • a user equipment which performs device-to-device communication with other user equipments, where the user equipment includes:
  • An interference value measuring unit that measures a first interference value on the resource block
  • a transmit power obtaining unit configured to obtain, according to the first interference value, a transmit power of the user equipment.
  • a base station which provides a service for a user equipment that performs device-to-device communication with other user equipments, where the base station includes:
  • the interference value receiving unit receives the first interference value sent by the user equipment, where the first interference value is obtained by the user equipment measuring on the resource block;
  • a transmit power calculation unit configured to calculate a transmit power of the user equipment based on the first interference value
  • a transmit power sending unit to send the transmit power to the user equipment.
  • a communication system including:
  • a first user equipment which performs device-to-device communication with the second user equipment
  • a second user equipment measuring a first interference value on the resource block; receiving a first reference signal sent by the first user equipment, and calculating, according to the first reference signal, the first user equipment and the second user a first path loss value between the devices; obtaining a transmit power of the second user equipment according to the first interference value and the first path loss value.
  • a communication system including:
  • a first user equipment which performs device-to-device communication with the second user equipment
  • a second user equipment measuring a first interference value on the resource block; receiving a first reference signal sent by the first user equipment, and calculating, according to the first reference signal, the first user equipment and the second user a first path loss value between the devices; receiving a second reference signal sent by the base station, and calculating a reference signal received power value according to the second reference signal; transmitting the reference signal received power value to the base station, and the a first interference value and the first path loss value; receiving a maximum allowed transmission power sent by the base station; calculating a transmission power value according to the first interference value and the first path loss value; The power and the transmit power value determine a final transmit power of the second user equipment;
  • a communication system including:
  • a first user equipment which performs device-to-device communication with the second user equipment
  • a second user equipment measuring a first interference value on the resource block; receiving a first reference signal sent by the first user equipment, and calculating, according to the first reference signal, the first user equipment and the second user a first path loss value between the devices; receiving a second reference signal sent by the base station, and calculating a reference signal received power value according to the second reference signal; transmitting the reference signal received power value to the base station, and the a first interference value and the first path loss value; receiving a maximum allowed transmit power and a transmit power value sent by the base station; determining a final of the second user equipment according to the maximum allowed transmit power and the transmit power value Transmitting power
  • the base station sends a second reference signal to the second user equipment, and receives the reference signal received power value sent by the second user equipment, and the first interference value and the first path loss value; Determining a maximum allowed transmit power of the user equipment; calculating a transmit power value according to the first interference value and the first path loss value; and sending the maximum allowed transmit power and the transmit power value to the second user equipment .
  • a communication system including:
  • a first user equipment which performs device-to-device communication with the second user equipment
  • the second user equipment measures the first interference value on the resource block; and obtains the transmission power of the second user equipment according to the first interference value.
  • a communication system including:
  • a first user equipment which performs device-to-device communication with the second user equipment
  • the first interference value is measured on the resource block; the first interference value is reported to the base station; and the sending power of the second user equipment sent by the base station is received;
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to execute the power control method as described above in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a power control method as described above in a base station.
  • a computer readable program is provided, wherein when at a user equipment When the program is executed, the program causes a computer to execute the power control method as described above in the user equipment.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a power control method as described above in a user equipment.
  • the beneficial effects of the embodiment of the present invention are that the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference in the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Embodiment 1 is a schematic flow chart of a power control method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of D2D unicast communication under network coverage according to Embodiment 1 of the present invention
  • FIG. 3 is another flowchart of a power control method according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic diagram of D2D unicast communication without network coverage according to Embodiment 1 of the present invention
  • FIG. 6 is another flowchart of a power control method according to Embodiment 1 of the present invention
  • 7 is a schematic flow chart of a power control method according to Embodiment 2 of the present invention
  • FIG. 8 is another schematic flowchart of a power control method according to Embodiment 2 of the present invention.
  • FIG. 9 is another schematic flowchart of a power control method according to Embodiment 2 of the present invention.
  • Figure 10 is a diagram showing the maximum interference allowed in the calculation of Embodiment 2 of the present invention.
  • FIG. 11 is a schematic flow chart of a power control method according to Embodiment 3 of the present invention.
  • FIG. 12 is a schematic diagram of D2D multicast or broadcast communication under network coverage according to Embodiment 3 of the present invention
  • FIG. 13 is another flowchart of a power control method according to Embodiment 3 of the present invention
  • FIG. 14 is a schematic diagram of D2D broadcast or multicast communication without network coverage according to Embodiment 3 of the present invention
  • FIG. 15 is another flowchart of a power control method according to Embodiment 3 of the present invention
  • FIG. 16 is a schematic flow chart of a power control method according to Embodiment 4 of the present invention.
  • FIG. 17 is a schematic structural diagram of a user equipment according to Embodiment 5 of the present invention.
  • FIG. 18 is another schematic structural diagram of a user equipment according to Embodiment 5 of the present invention.
  • FIG. 19 is a schematic diagram of another configuration of a user equipment according to Embodiment 5 of the present invention.
  • Figure 20 is a block diagram showing the structure of a base station according to Embodiment 6 of the present invention.
  • Figure 21 is a block diagram showing another structure of a base station according to Embodiment 6 of the present invention.
  • Figure 22 is a block diagram showing another structure of a base station according to Embodiment 6 of the present invention.
  • FIG. 23 is a schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • FIG. 24 is another schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • FIG. 25 is a schematic diagram of another configuration of a user equipment according to Embodiment 7 of the present invention.
  • Figure 26 is a block diagram showing the structure of a base station according to Embodiment 8 of the present invention.
  • the embodiment of the invention provides a power control method, which is applied to a user equipment and other user equipments.
  • the embodiment of the present invention takes a D2D user equipment of unicast communication as an example, and describes it from the user equipment side.
  • the power control method includes:
  • Step 101 The user equipment measures a first interference value on the resource block.
  • Step 102 The user equipment receives the first reference signal sent by the other user equipment, and calculates a first path loss value between the user equipment and the other user equipment according to the first reference signal.
  • Step 103 Obtain a transmit power of the user equipment according to the first interference value and the first path loss value.
  • the user equipment performs D2D communication with the other user equipments, where the other user equipments may be one or more.
  • the present invention only uses one other user equipment as an example, but the present invention does not. Limited to this.
  • the D2D user equipment of the unicast communication is taken as an example to measure the path loss value between the pair of D2D user equipments and the interference values respectively received by them.
  • the user equipment performing D2D communication can measure the interference value on the resource block (RB), such as IoT (Interference over Thermal).
  • RB resource block
  • IoT Interference over Thermal
  • the power control of the transmission signal may be performed according to the transmission power.
  • the user equipment performing D2D communication of the present invention can measure the interference value, thereby making it possible to consider the interference in the cell and more accurately implement the power control.
  • the user equipment can perform D2D communication under network coverage.
  • 2 is a schematic diagram of D2D unicast communication under network coverage according to an embodiment of the present invention.
  • user equipments DUE1 and DUE2 perform D2D communication
  • CUE1 is a cellular communication user equipment
  • CUE1 can use the same for DUEL and DUE2. Resources.
  • the following is a description of the scenario shown in FIG. 2 as an example.
  • FIG. 3 is another flow chart of a power control method according to an embodiment of the present invention, in which a base station simultaneously schedules a cellular user equipment and a D2D user equipment on some or some RBs.
  • DUE1 User Equipment 1
  • the method includes:
  • Step 301 The user equipment 1 measures a first interference value on the resource block.
  • the user equipment performing D2D communication may each measure the interference value on the resource block.
  • the IoT of RB For example, the IoT of RB.
  • Step 302 The base station measures a second interference value on the resource block.
  • the base station can measure the IoT of each RB in the system bandwidth.
  • Step 303 the user equipment 1 sends a first reference signal to the user equipment 2 (DUE2);
  • Step 304 the user equipment 2 sends a first reference signal to the user equipment 1;
  • the reference signal may be a Discovery signal for user discovery or a pilot signal for measurement.
  • the present invention is not limited thereto, and a specific embodiment may be determined according to actual conditions.
  • Step 305 The user equipment 1 calculates a first path loss value between the user equipment 1 and the user equipment 2 according to the first reference signal.
  • the user equipment 1 can detect the first reference signal and calculate a Reference Signal Received Power (RSRP) value between the user equipment 1 and the user equipment 2. Further, the user equipment 1 can obtain the reference signal transmission power value; and estimate the path loss value between the user equipment 1 and the user equipment 2 based on the reference signal transmission power value and the reference signal reception power value.
  • RSRP Reference Signal Received Power
  • the reference signal transmission power value may be sent to the user equipment 1 in advance by the base station side; the correspondence between the sequence of the reference signal and the transmission power may also be defined in advance, and the user equipment 1 detects the sequence of the reference signal, and the reference can be obtained.
  • Signal transmission power value may be sent to the user equipment 1 in advance by the base station side; the correspondence between the sequence of the reference signal and the transmission power may also be defined in advance, and the user equipment 1 detects the sequence of the reference signal, and the reference can be obtained.
  • Signal transmission power value may be sent to the user equipment 1 in advance by the base station side; the correspondence between the sequence of the reference signal and the transmission power may also be defined in advance, and the user equipment 1 detects the sequence of the reference signal, and the reference can be obtained.
  • Signal transmission power value may be sent to the user equipment 1 in advance by the base station side; the correspondence between the sequence of the reference signal and the transmission power may also be defined in advance, and the user equipment 1 detects the sequence of the reference signal, and the reference can be obtained.
  • Step 306 The base station sends a second reference signal.
  • the base station may send reference signals, such as Common Reference Signal (CRS), to multiple user equipments (e.g., CUE1, DUE1, and DUE2).
  • CRS Common Reference Signal
  • Step 307 The user equipment 1 calculates an RSRP value according to the second reference signal.
  • Step 308 The user equipment 1 sends an RSRP value, and a first interference value and a first path loss value to the base station.
  • Step 309 The base station calculates the maximum allowed transmit power of the user equipment 1.
  • Step 310 The base station sends the maximum allowed transmission power to the user equipment 1.
  • Step 311 The user equipment 1 calculates a transmit power value according to the first interference value and the first path loss value.
  • a partial power compensation mechanism may be adopted, and the transmit power value may be determined by the following formula:
  • P d is the transmit power value
  • ⁇ is the preset partial compensation factor
  • PL is the first path loss value.
  • ⁇ can be used by the base station, the controller that receives the DUE or the D2D cluster (Cluster) Pre-configured.
  • P d median (P min , P max , ⁇ I + ⁇ );
  • the dish is the preset maximum power allowed by the user equipment 1
  • P mm is the minimum power required by the user equipment 1 to be preset
  • I is the first interference value
  • ⁇ is the preset compensation factor.
  • Step 312 The user equipment 1 determines the final transmit power of the user equipment according to the transmit power value and the maximum allowable transmit power.
  • the final transmission power of the user equipment 1 can be determined by the following formula:
  • P. ut final transmission power of the user equipment 1 Pc is the maximum allowed transmit power, P d is the transmission power value,?
  • the dish is a preset maximum power allowed to be transmitted by the user equipment 1;
  • S e [0, l] is a parameter for reflecting the scheduling policy of the base station side. For example, [delta] smaller the higher the D2D scheduling priority of the user equipment, whereas the higher scheduling priority of the cellular user equipment; [delta] P d can along with the value sent by the base station to the user equipment D2D.
  • the above calculation formulas and the like are merely specific embodiments of the present invention, but the present invention is not limited thereto.
  • the base station specifically calculates the maximum allowed transmission power of the user equipment 1 in step 309
  • the transmit power value may be calculated on the user equipment side as described in step 311, or may be calculated on the base station side.
  • FIG. 4 is another flow chart of a power control method according to an embodiment of the present invention, in which a base station simultaneously schedules a cellular user equipment and a D2D user equipment on some or some RBs.
  • DUE1 User Equipment 1
  • the method includes:
  • Step 401 The user equipment 1 measures the first interference value on the resource block.
  • Step 402 The base station measures a second interference value on the resource block.
  • Step 403 The user equipment 1 sends a first reference signal to the user equipment 2 (DUE2); so that the user equipment 2 receives the first reference signal and calculates a first path loss value between the user equipment 2 and the user equipment 1.
  • DUE2 user equipment 2
  • Step 404 The user equipment 2 sends a first reference signal to the user equipment 1;
  • Step 405 The user equipment 1 calculates a first path loss value between the user equipment 1 and the user equipment 2 according to the first reference signal.
  • Step 406 The base station sends a second reference signal.
  • Step 407 The user equipment 1 calculates an RSRP value according to the second reference signal.
  • Step 408 The user equipment 1 sends an RSRP value, and a first interference value and a first path loss value to the base station.
  • Step 409 The base station calculates a maximum allowed transmit power and a transmit power value of the user equipment 1.
  • Step 410 The base station sends the maximum allowed transmit power and the transmit power value to the user equipment 1.
  • Step 411 The user equipment 1 determines the final transmit power of the user equipment according to the transmit power value and the maximum allowable transmit power.
  • step 409 and step 410 different from FIG. 3, in the method described in FIG. 4, the maximum allowable transmit power and the transmit power value can be calculated on the base station side.
  • Embodiment 2 refers to Embodiment 2 as follows.
  • other steps may refer to FIG. 3, and the manner of determining the final transmission power in step 411 may be the same as step 312.
  • FIGS. 3 and 4 only schematically show the case of D2D unicast communication under network coverage, but the present invention is not limited thereto, and may be appropriately adjusted.
  • the execution order of the above steps may be changed, or one or several steps or the like may be omitted, and a specific implementation manner may be determined according to actual conditions.
  • FIG. 5 is a schematic diagram of D2D unicast communication without network coverage according to an embodiment of the present invention. As shown in FIG. 5, user equipments DUE1 and DUE2 perform D2D communication, and CUE1 is a cellular communication user equipment. The following shows only the scenario shown in Figure 5 as an example.
  • FIG. 6 is another flow chart of a power control method according to an embodiment of the present invention.
  • DUE1 User Equipment 1
  • the method includes:
  • Step 601 The user equipment saves a relationship between the first interference value and the transmission power of the first reference signal.
  • the reference signal sequence and the signal power and the interference correspondence relationship may be pre-stored in
  • Step 602 The user equipment 1 measures the first interference value on the resource block.
  • Step 603 The user equipment 1 sends a first reference signal to the user equipment 2 (DUE2); so that the user equipment 2 receives the first reference signal and calculates a first path loss value between the user equipment 2 and the user equipment 1.
  • DUE2 user equipment 2
  • the interference received by DUE1 is relatively small, and the interference received by DUE2 is relatively large; when DUE 1 selects the reference signal RS, a sequence with a small transmission power can be selected, and DUE2 selects a large transmission power. the sequence of.
  • Step 604 the user equipment 2 sends a first reference signal to the user equipment 1;
  • Step 605 the user equipment 1 calculates the first between the user equipment 1 and the user equipment 2 according to the first reference signal. One way loss value.
  • the DUE1 can obtain the reference signal received power by measuring the reference signal, and can detect the sequence of the reference signal, and obtain the reference signal transmission power through the detected sequence. DUE1 can use the obtained reference signal transmission power and reference signal reception power to calculate the path loss between DUE1 and DUE2.
  • Step 606 The user equipment 1 calculates a transmit power value according to the first interference value and the first path loss value.
  • the transmission power P can be determined based on the path loss information and the interference information.
  • Ut , P The method of determining the above-described method of determining ut P d may be employed. which is
  • P d is the transmit power value
  • a is the preset partial compensation factor
  • PL is the first path loss value.
  • ⁇ can be pre-configured by a base station, a controller that receives a DUE or a D2D cluster.
  • the dish is the preset maximum power allowed by the user equipment 1
  • P mm is the minimum power required by the user equipment 1 to be preset
  • I is the first interference value
  • ⁇ is the preset compensation factor.
  • FIGS. 2 to 6 are only schematically illustrated, but the present invention is not limited thereto, and may be appropriately adjusted.
  • the execution order of the above steps may be changed, or one or several steps may be omitted, and the specific implementation manner may be determined according to actual conditions.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference within the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 2
  • the embodiment of the invention provides a power control method, which is applied to a communication system in which a user equipment performs D2D communication with other user equipments.
  • a power control method which is applied to a communication system in which a user equipment performs D2D communication with other user equipments.
  • D2D unicast communication with network coverage the embodiment of the present invention The present invention will be described from the base station side, and the same contents as those in the first embodiment will not be described again.
  • FIG. 7 is a schematic flowchart of a power control method according to an embodiment of the present invention. As shown in FIG. 7, the power control method includes:
  • Step 701 The base station sends a second reference signal to the user equipment, so that the user equipment calculates the reference signal received power value according to the second reference signal.
  • Step 702 The base station receives the reference signal received power value sent by the user equipment, and the first interference value and the first path loss value.
  • the first interference value is obtained by the user equipment measuring on the resource block, and the first path loss value is obtained by the user.
  • the device calculates according to the first reference signal sent by other user equipments.
  • the transmit power value of the user equipment may be calculated on the user equipment side, and the base station side may send the maximum allowed transmit power to the user equipment.
  • FIG. 8 is another schematic flowchart of a power control method according to an embodiment of the present invention. As shown in FIG. 8, the power control method includes:
  • Step 801 The base station sends a second reference signal to the user equipment, so that the user equipment calculates the reference signal received power value according to the second reference signal.
  • Step 802 The base station receives a reference signal received power value sent by the user equipment, and the first interference value and the first path loss value.
  • Step 803 The base station calculates the maximum interference allowed on the resource. For how to calculate, refer to Figure 10 below.
  • Step 804 The base station calculates a second path loss value between the user equipment and the base station according to the reference signal received power value.
  • Step 805 The base station calculates a maximum allowed transmission power of the user equipment according to the maximum allowed interference and the second path loss value.
  • Step 806 The base station sends a maximum allowed transmission power to the user equipment.
  • the base station may send the calculated Pc value to the user equipment by using RRC (Radio Resource Control) signaling or Downlink Control Information (DCI).
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the transmit power value of the user equipment may be calculated on the base station side, and the base station side may send the maximum allowed transmit power and the transmit power value to the user equipment.
  • FIG. 9 is another schematic flowchart of a power control method according to an embodiment of the present invention. As shown in FIG. 9, the power control method includes: Step 901: The base station sends a second reference signal to the user equipment, so that the user equipment calculates the reference signal received power value according to the second reference signal.
  • Step 902 The base station receives a reference signal received power value sent by the user equipment, and a first interference value and a first path loss value.
  • Step 903 The base station calculates the maximum interference allowed on the resource; for how to calculate, refer to FIG. 10 as follows.
  • Step 904 The base station calculates a second path loss value between the user equipment and the base station according to the reference signal received power value.
  • Step 905 The base station calculates a maximum allowed transmission power of the user equipment according to the maximum allowed interference and the second path loss value.
  • Step 906 The base station calculates a transmit power value of the user equipment according to the first interference value and the first path loss value. For details, refer to step 311 in FIG. 3 or step 606 in FIG. 6.
  • Step 907 The base station sends a maximum allowed transmit power and a transmit power value to the user equipment.
  • FIG. 10 is a schematic diagram of calculating the maximum interference allowed in the embodiment of the present invention. As shown in FIG. 10, the method includes:
  • Step 1001 The base station measures a second interference value on the resource block.
  • Step 1002 The base station sends a second reference signal, so that the user equipment (CUE) that performs cellular communication feeds back the reference signal to receive the power value according to the second reference signal.
  • CUE user equipment
  • Step 1003 The base station receives a reference signal received power value fed back by the user equipment that performs cellular communication.
  • Step 1004 The base station uses the reference signal to receive a power value, and calculates a transmit power of the user equipment that performs cellular communication.
  • Step 1005 The base station calculates the maximum interference allowed according to the second interference value and the transmission power of the user equipment that performs cellular communication.
  • the base station can calculate the maximum interference Imax allowed on the CUE and DUE shared resources based on the measured IoT value and the estimated CUE transmission power.
  • FIGS. 8 to 10 only schematically show the network side case of D2D unicast communication under network coverage, but the present invention is not limited thereto, and may be appropriately adjusted.
  • the execution order of the above steps may be changed, or one or several steps or the like may be omitted, and a specific implementation manner may be determined according to actual conditions.
  • D2D communication is performed in a scenario of D2D unicast communication with network coverage.
  • the user equipment measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference within the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 3
  • the embodiment of the invention provides a power control method, which is applied to a user equipment and other user equipments.
  • the embodiment of the present invention takes a D2D user equipment of broadcast or multicast communication as an example, and describes it from the user equipment side.
  • FIG. 11 is a schematic flowchart of a power control method according to an embodiment of the present invention. As shown in FIG. 11, the power control method includes:
  • Step 1101 The user equipment measures a first interference value on the resource block.
  • Step 1102 The user equipment obtains the sending power of the user equipment according to the first interference value.
  • the user equipment performs D2D communication with the other user equipments, where the other user equipments may be one or more.
  • the present invention only uses one other user equipment as an example, but the present invention does not. Limited to this.
  • the user equipment can perform D2D communication under network coverage.
  • 12 is a schematic diagram of D2D multicast or broadcast communication under network coverage according to an embodiment of the present invention. As shown in FIG. 12, user equipments DUE1 and DUE2 perform D2D communication, CUE1 is a cellular communication user equipment, and CUE1 can be combined with DUE1 and DUE2. Use the same resources. Only the scenario shown in FIG. 12 will be described below as an example.
  • FIG. 13 is another flow chart of a power control method according to an embodiment of the present invention, where a base station is at some or some
  • the cellular user equipment and the D2D user equipment are simultaneously scheduled on the RB.
  • DUE1 User Equipment 1
  • the method includes:
  • Step 1301 The user equipment measures a first interference value on the resource block.
  • Step 1302 The user equipment sends a first interference value to the base station.
  • the DUE1 can measure the interference on the system bandwidth, obtain the IoT on each RB, and report it to the base station.
  • Step 1303 The base station calculates a transmit power of the user equipment based on the first interference value.
  • Step 1304 The user equipment receives the sending power of the user equipment sent by the base station.
  • Step 1305 The base station allocates the resource with the smallest interference value to the user equipment, as the user equipment transmission letter. Resources.
  • the user equipment can also perform D2D communication without network coverage.
  • 14 is a schematic diagram of D2D broadcast or multicast communication without network coverage according to an embodiment of the present invention. As shown in FIG. 14, user equipments DUE1 and DUE2 perform D2D communication. Only the scenario shown in FIG. 14 will be described below as an example.
  • FIG. 15 is another flow chart of the power control method of the embodiment of the present invention.
  • DUE1 User Equipment 1
  • the method includes:
  • Step 1501 The user equipment stores a correspondence between the first interference value and the transmission power.
  • the correspondence between the IoT and the transmission power can be defined in advance.
  • a threshold can be set. When ⁇ is below a certain threshold, the larger the IoT is, the larger the transmission power is. When the IoT is greater than a certain threshold, the larger the IoT is, the smaller the transmission power is.
  • the correspondence can be saved in DUE1 in the form of a table.
  • Step 1502 The user equipment measures a first interference value on the resource block.
  • Step 1503 The user equipment determines, according to the first interference value and the corresponding relationship, the sending power of the user equipment. For example, DUE1 can find a pre-defined power transmission table according to the value of IoT on the selected resource, thereby determining the transmission power.
  • Step 1504 The user equipment selects a resource with the smallest interference value as a resource for transmitting information.
  • Figs. 13 and 15 only schematically show the case of D2D broadcast or multicast communication, but the present invention is not limited thereto, and may be appropriately adjusted.
  • the execution order of the above steps may be changed, or one or several steps or the like may be omitted, and a specific implementation manner may be determined according to actual conditions.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference in the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 4
  • the embodiment of the invention provides a power control method, which is applied to a user equipment and other user equipments.
  • FIG. 16 is a schematic flowchart of a power control method according to an embodiment of the present invention.
  • the power control method includes: Step 1601: The base station receives a first interference value sent by the user equipment, where the first interference value is obtained by the user equipment measuring on the resource block;
  • Step 1602 The base station calculates, according to the first interference value, a transmit power of the user equipment.
  • Step 1603 The base station sends the sending power to the user equipment.
  • the sending power may be sent to the user equipment by using RRC signaling or DCI information.
  • the method may further include:
  • Step 1604 The base station allocates the resource with the smallest interference value to the user equipment, as a resource for the user equipment to transmit information.
  • the step 1602 is to calculate the transmit power of the user equipment based on the first interference value
  • the method may include: the base station measuring the second interference value on the resource block; determining, according to the first interference value and the second interference value, the sending of the user equipment. power.
  • the base station may determine the ⁇ value of the user equipment performing cellular communication according to the values of the two IoTs, thereby estimating the maximum interference allowed under the shared resource, thereby determining the transmission power Pc of the DUE1.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference in the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 5
  • the embodiment of the invention provides a user equipment, which performs D2D communication with other user equipments.
  • the embodiment of the present invention corresponds to the power control method in Embodiment 1, and the same content is not described herein again.
  • FIG. 17 is a schematic diagram of a configuration of a user equipment according to an embodiment of the present invention.
  • the user equipment 1700 includes: an interference value measuring unit 1701, a path loss value calculating unit 1702, and a transmitting power obtaining unit 1703.
  • Other portions of the user device 1700 that are not shown may be referenced to the prior art.
  • the interference value measuring unit 1701 measures the first interference value on the resource block; the path loss value calculating unit 1702 receives the first reference signal sent by the other user equipment, and calculates the user equipment and other user equipment according to the first reference signal. The first path loss value; the transmit power obtaining unit 1703 obtains the transmit power of the user equipment according to the first interference value and the first path loss value.
  • the user equipment 1700 may further include: a reference signal sending unit (not shown in the figure), The first reference signal is sent, so that other user equipments receive the first reference signal and calculate a first path loss value between the other user equipment and the user equipment.
  • a reference signal sending unit not shown in the figure
  • the user equipment can perform D2D communication under network coverage.
  • 18 is another schematic diagram of the configuration of the user equipment according to the embodiment of the present invention. As shown in FIG. 18, the user equipment 1800 includes: an interference value measuring unit 1701, a path loss value calculating unit 1702, and a transmission power obtaining unit 1703, as described above.
  • the user equipment 1800 may further include: a power value calculation unit 1804 and an information reporting unit 1805; wherein, the power value calculation unit 1804 receives the second reference signal sent by the base station, and calculates an RSRP value according to the second reference signal; The information reporting unit 1805 sends the RSRP value to the base station, and the first interference value and the first path loss value.
  • the transmission power obtaining unit 1703 may specifically include: an allowed power receiving unit 1806, a power value calculating unit 1807, and a final power determining unit 1808.
  • the allowable power receiving unit 1806 receives the maximum allowed transmit power sent by the base station, and the maximum allowable transmit power is calculated by the base station based on the RSRP value;
  • the power value calculation unit 1807 calculates the transmit power value according to the first interference value and the first path loss value;
  • the final power determining unit 1808 determines the final transmit power of the user equipment based on the transmit power value and the maximum allowed transmit power.
  • FIG. 19 is another schematic structural diagram of a user equipment according to an embodiment of the present invention, as shown in FIG.
  • 1900 includes: an interference value measuring unit 1701, a path loss value calculating unit 1702 and a transmission power obtaining unit 1703, and a power value calculating unit 1804 and an information reporting unit 1805; as described above.
  • the transmission power obtaining unit 1703 may specifically include: an information receiving unit 1906 and a final power determining unit 1907.
  • the information receiving unit 1906 receives the maximum allowed transmit power and the transmit power value sent by the base station; the maximum allowable transmit power is calculated by the base station based on the RSRP value, and the transmit power value is calculated by the base station based on the first interference value and the first path loss value;
  • the final power determining unit 1907 determines the final transmission power of the user equipment based on the transmission power value and the maximum allowed transmission power.
  • the path loss value calculation unit 1702 may be specifically configured to: obtain a received signal power according to the first reference signal; and detect a sequence of the first reference signal to obtain a transmit signal power of the first reference signal corresponding to the sequence; The first path loss value is calculated using the transmitted signal power and the received signal power.
  • the user equipment can perform D2D communication under network coverage.
  • the user equipment may save a relationship between the first interference value and a transmission power of the first reference signal; and select a transmission power of the first reference signal according to the first interference value.
  • the transmission power obtaining unit 1703 can calculate the transmission power according to the first interference value and the first path loss value. Value, the transmission power value is used as the transmission power of the user equipment.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference within the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 6
  • the embodiments of the present invention provide a base station, which provides services for user equipments that perform D2D communication with other user equipments.
  • the embodiment of the present invention corresponds to the power control method in Embodiment 2, and the same content is not described again.
  • FIG. 20 is a schematic diagram of a configuration of a base station according to an embodiment of the present invention.
  • the base station 2000 includes: a reference signal transmitting unit 2001 and an information receiving unit 2002.
  • Other parts of the base station 2000 that are not shown may be referred to the prior art.
  • the reference signal sending unit 2001 sends a second reference signal to the user equipment, so that the user equipment calculates the RSRP value according to the second reference signal; the information receiving unit 2002 receives the RSRP value sent by the user equipment, and the first interference value and the first path loss.
  • the first interference value is obtained by the user equipment measuring on the resource block, and the first path loss value is calculated by the user equipment according to the first reference signal sent by the other user equipment.
  • FIG 21 is a block diagram showing another configuration of a base station according to an embodiment of the present invention.
  • the base station 2100 includes: a reference signal transmitting unit 2001 and an information receiving unit 2002, as described above.
  • the base station 2100 may further include: an interference allowing calculation unit 2103, a path loss value calculating unit 2104, an allowable power calculating unit 2105, and an information transmitting unit 2106.
  • the allowable interference calculation unit 2103 calculates the maximum interference allowed on the resource; the path loss value calculation unit 2104 calculates the second path loss value between the user equipment and the base station according to the RSRP value; the allowable power calculation unit 2105 according to the maximum interference allowed and The second path loss value calculates the maximum allowed transmission power of the user equipment; and the information transmitting unit 2106 transmits the maximum allowed transmission power to the user equipment.
  • the allowed interference calculation unit 2103 may include: an interference value measuring unit 21031, a transmission power calculating unit 21032, and an allowed interference determining unit 21033; wherein the interference value measuring unit 21031 measures the second interference value on the resource block;
  • the power calculation unit 21032 calculates the transmission power of the user equipment that performs cellular communication by using the RSRP value fed back by the user equipment that performs cellular communication;
  • the permission interference determination unit 21033 determines the permission according to the interference value measured by the base station and the transmission power of the user equipment that performs cellular communication.
  • FIG. 22 is a schematic diagram of another configuration of a base station according to an embodiment of the present invention. As shown in FIG. 22, the base station 2200 includes: a reference signal sending unit 2001 and an information receiving unit 2002; and an interference allowing calculation unit 2103, a path loss value calculating unit 2104, The power calculation unit 2105 and the information transmission unit 2106 are allowed; as described above.
  • the base station 2200 may further include: a power value calculation unit 2207, configured to calculate a transmit power value of the user equipment according to the first interference value and the first path loss value; and the information sending unit 2106 is further configured to send and send to the user equipment. Power value.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference within the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 7
  • the embodiment of the invention provides a user equipment, which performs D2D communication with other user equipments.
  • the embodiment of the present invention corresponds to the power control method in Embodiment 3, and the same content will not be described again.
  • FIG. 23 is a schematic diagram of a configuration of a user equipment according to an embodiment of the present invention.
  • the user equipment 2300 includes: an interference value measuring unit 2301 and a transmission power obtaining unit 2302. Other portions of the user device 2300 that are not shown may be referenced to the prior art.
  • the interference value measuring unit 2301 measures the first interference value on the resource block; the transmission power obtaining unit 2302 obtains the transmission power of the user equipment according to the first interference value.
  • FIG. 24 is another schematic diagram of the configuration of the user equipment according to the embodiment of the present invention.
  • the user equipment 2400 includes: an interference value measuring unit 2301 and a transmission power obtaining unit 2302, as described above.
  • the user equipment 2400 may further include: an interference value reporting unit 2403, configured to send a first interference value to the base station; and, the sending power obtaining unit 2302 is specifically configured to: receive, by the base station, a transmit power of the user equipment, where The power is determined by the base station based on the first interference value.
  • an interference value reporting unit 2403 configured to send a first interference value to the base station
  • the sending power obtaining unit 2302 is specifically configured to: receive, by the base station, a transmit power of the user equipment, where The power is determined by the base station based on the first interference value.
  • the user equipment can perform D2D communication without network coverage.
  • 25 is another schematic diagram of the configuration of the user equipment according to the embodiment of the present invention. As shown in FIG. 25, the user equipment 2500 includes: a interference value measuring unit 2301 and a transmission power obtaining unit 2302, as described above.
  • the user equipment 2500 may further include: a correspondence relationship storage unit 2503, storing the first The corresponding relationship between the interference value and the transmission power; and the transmission power obtaining unit 2302 is specifically configured to: determine the transmission power of the user equipment according to the first interference value and the correspondence.
  • the user equipment 2500 may further include: a resource selection unit 2504 that selects a resource with the smallest interference value as a resource for transmitting information.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference in the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 8
  • the embodiments of the present invention provide a base station, which provides services for user equipments that perform D2D communication with other user equipments.
  • the embodiment of the present invention corresponds to the power control method in Embodiment 4, and the same content is not described herein again.
  • FIG. 26 is a schematic diagram of a configuration of a base station according to an embodiment of the present invention.
  • the base station 2600 includes: an interference value receiving unit 2601, a transmission power calculating unit 2602, and a transmission power transmitting unit 2603.
  • Other parts of the base station 2600 that are not shown may refer to the prior art.
  • the interference value receiving unit 2601 receives the first interference value sent by the user equipment, where the first interference value is obtained by the user equipment measuring on the resource block; the sending power calculation unit 2602 calculates the transmission power of the user equipment based on the first interference value; The transmission power transmitting unit 2603 transmits the transmission power to the user equipment.
  • the base station 2600 may further include: a resource configuration unit 2604, configured to allocate the resource with the smallest interference value to the user equipment, as a resource for the user equipment to transmit information.
  • a resource configuration unit 2604 configured to allocate the resource with the smallest interference value to the user equipment, as a resource for the user equipment to transmit information.
  • the transmit power calculation unit 2602 may specifically include: an interference value measurement unit 26021 and a transmission power determination unit 26022; wherein the interference value measurement unit 26021 measures the second interference value on the resource block; the transmission power determination unit 26022 is configured according to The first interference value and the second interference value determine the transmission power of the user equipment.
  • the user equipment performing D2D communication measures the interference value on the resource block, and determines the transmission power of the user equipment based on the interference value. Not only can the interference within the cell be considered, the power control is more accurate, and the interference to other users can be ensured as small as possible, so that the system has good performance.
  • Example 9 The embodiment of the invention further provides a communication system, and there is a user equipment for performing D2D communication. The same contents as those of Embodiments 1 to 8 will not be described again.
  • a schematic structural diagram of the communication system can be referred to FIG. 2.
  • the communication system includes: a first user equipment that performs D2D communication with a second user equipment;
  • a second user equipment measuring a first interference value on the resource block; receiving a first reference signal sent by the first user equipment, and calculating a first path loss between the first user equipment and the second user equipment according to the first reference signal Receiving a second reference signal sent by the base station, and calculating an RSRP value according to the second reference signal; transmitting an RSRP value to the base station, and the first interference value and the first path loss value; receiving a maximum allowed transmit power sent by the base station; Calculating a transmission power value according to an interference value and a first path loss value; determining a final transmission power of the second user equipment according to the maximum allowed transmission power and the transmission power value;
  • the base station sends a second reference signal to the second user equipment, receives the RSRP value sent by the second user equipment, and the first interference value and the first path loss value; calculates the maximum allowed transmission power of the user equipment, and sends the maximum allowed transmission power to the second user equipment. .
  • FIG. 2 a schematic structural diagram of the communication system can be referred to FIG. 2.
  • the communication system includes: a first user equipment that performs D2D communication with a second user equipment;
  • a second user equipment measuring a first interference value on the resource block; receiving a first reference signal sent by the first user equipment, and calculating a first path loss between the first user equipment and the second user equipment according to the first reference signal Receiving a second reference signal sent by the base station, and calculating an RSRP value according to the second reference signal; transmitting an RSRP value to the base station, and the first interference value and the first path loss value; and receiving the maximum allowed transmit power and the transmit power sent by the base station a value; determining a final transmit power of the second user equipment according to the maximum allowed transmit power and the transmit power value;
  • the base station sends a second reference signal to the second user equipment, receives the RSRP value sent by the second user equipment, and the first interference value and the first path loss value; calculates a maximum allowed transmit power of the user equipment; and according to the first interference value and The first path loss value calculates a transmit power value; the maximum allowed transmit power and the transmit power value are sent to the second user equipment.
  • FIG. 5 a schematic structural diagram of the communication system can be referred to FIG. 5.
  • the communication system includes: a first user equipment that performs D2D communication with a second user equipment;
  • a schematic structural diagram of a communication system can be referred to FIG.
  • the communication system includes: a first user equipment that performs D2D communication with a second user equipment;
  • the second user equipment, the first interference value on the measurement resource block; the first interference value is reported to the base station; and the transmission power of the second user equipment sent by the base station is received;
  • the communication system includes: a first user equipment that performs D2D communication with a second user equipment;
  • the second user equipment measures the first interference value on the resource block; and obtains the transmission power of the second user equipment according to the first interference value.
  • An embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute in the user equipment as described in Embodiments 1, 3, 5, and 7 above. Power control method.
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a power control method as described in Embodiments 1, 3, 5, and 7 above in a user equipment.
  • Embodiments of the present invention also provide a computer readable program, wherein the program causes a computer to perform power as described in Embodiments 2, 4, 6, and 8 above in the base station when the program is executed in a base station Control Method.
  • Embodiments of the present invention also provide a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a power control method as described in Embodiments 2, 4, 6, and 8 above in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices. For example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention porte sur un procédé de commande d'énergie, un équipement utilisateur et une station de base. Le procédé de commande d'énergie comprend : un équipement utilisateur mesurant une valeur de brouillage sur un bloc de ressources ; la réception d'un signal de brouillage envoyé par un autre équipement utilisateur, et le calcul d'une valeur de perte de chemin entre l'équipement utilisateur et l'autre équipement utilisateur selon le signal de brouillage ; et l'obtention d'une puissance d'envoi de l'équipement utilisateur selon la valeur de brouillage et la valeur de perte de chemin. Au moyen des modes de réalisation de la présente invention, non seulement un brouillage à l'intérieur de cellules peut être pris en compte et une commande d'énergie est plus précise, mais également le brouillage sur d'autres utilisateurs peut être garanti pour être assez petit pour rendre le système bon en performances.
PCT/CN2013/081195 2013-08-09 2013-08-09 Procédé de commande d'énergie, équipement utilisateur et station de base WO2015018072A1 (fr)

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WO2011124015A1 (fr) * 2010-04-06 2011-10-13 Nokia Corporation Procédé et appareil de gestion du brouillage entre cellules pour communications de dispositif à dispositif
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CN103052164A (zh) * 2012-12-27 2013-04-17 北京邮电大学 蜂窝与d2d混合网络中终端直通通信的干扰控制协调方法
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CN103139889A (zh) * 2011-11-28 2013-06-05 华为技术有限公司 D2d的功率控制方法、用户设备、基站和通讯系统
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