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WO2007119752A1 - Dispositif de contrôle de puissance d'émission d'un dispositif mobile et méthode de contrôle de puissance d'émission - Google Patents

Dispositif de contrôle de puissance d'émission d'un dispositif mobile et méthode de contrôle de puissance d'émission Download PDF

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Publication number
WO2007119752A1
WO2007119752A1 PCT/JP2007/057993 JP2007057993W WO2007119752A1 WO 2007119752 A1 WO2007119752 A1 WO 2007119752A1 JP 2007057993 W JP2007057993 W JP 2007057993W WO 2007119752 A1 WO2007119752 A1 WO 2007119752A1
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WO
WIPO (PCT)
Prior art keywords
transmission power
base station
power control
communication
mobile device
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/JP2007/057993
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English (en)
Japanese (ja)
Inventor
Shingo Higuchi
Kazuaki Ishioka
Yuji Inoue
Ryo Nakamura
Masato Maeda
Yukihiko Okumura
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.)
NTT Docomo Inc
Mitsubishi Electric Corp
Original Assignee
NTT Docomo Inc
Mitsubishi Electric Corp
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 NTT Docomo Inc, Mitsubishi Electric Corp filed Critical NTT Docomo Inc
Priority to JP2008510967A priority Critical patent/JP4856174B2/ja
Publication of WO2007119752A1 publication Critical patent/WO2007119752A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/386—TPC being performed in particular situations centralized, e.g. when the radio network controller or equivalent takes part in the power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

Definitions

  • the present invention relates to a transmission power control apparatus for a mobile device and a method for controlling transmission power of an uplink signal by combining uplink transmission power control commands received from each base station during communication with a plurality of base stations. It is about.
  • closed-loop transmission power control measures the signal-to-interference ratio (hereinafter referred to as SIR) of the communication channel at the base station, and the received communication channel determines the desired communication based on the measurement result.
  • SIR signal-to-interference ratio
  • the closed-loop transmission power control is further configured by a two-stage loop of inner loop control and outer loop control.
  • the base station or mobile device measures the SIR of the received signal in each slot, compares this measured SIR with the target SIR, and sends a transmission power control command to control the increase or decrease of the transmission power according to the difference.
  • Generate and transmit, and the other party changes the transmission power according to the received command and controls the measurement SIR to be equal to the target SIR.
  • outer loop control uses QoS (Q The target SIR is controlled so as to satisfy the reception quality corresponding to the ⁇ uality of service '', i.e., BLER (Block Error Rate) and BER (Bit error Rate). Measure and set an appropriate target SIR.
  • FIG. 22 shows a mobile communication system in which a mobile device communicates with a plurality of base stations.
  • the radio network controller (Radio Network Co) is connected between the base stations 3, 3,.
  • RCN ntroller
  • the mobile device 6 has base stations 3, 3,.
  • Uplink signal transmission power control is performed by combining uplink transmission power control commands for 1 2 n 1 2 n for each slot.
  • Uplink signal 5 transmitted from mobile station 6 is that of base station 3, 3,.
  • FIG. 23 shows an uplink transmission power control apparatus applied to a mobile device, which performs a combination of uplink transmission power control commands.
  • Figure 24 shows the method of combining the uplink transmission power control commands.
  • the receiver 7 of the mobile device 6 is connected to a plurality of base stations as shown in FIG. Signal 4, 4,..., 4 are received, and after down-converting each, AZD conversion is performed.
  • Downlink signal despreading units 8, 8,..., 8 are the inverse of the corresponding downlink signals 4, 4,.
  • the commands 9, 9,..., 9 are the individual channels that are code-multiplexed to the downstream signals 4, 4,.
  • Uplink transmission power control command combining unit 10 is a 3GPP (standard of mobile communication system by 3rd Generation Partnership Project) 25. 214 5.1.2 In accordance with the provisions in Chapter 2, uplink transmission power control commands 9, 9, ... , 9 per slot
  • the transmitter 12 performs power control according to the uplink transmission power control signal 11 and transmits the uplink signal 5.
  • the uplink transmission power control command combining unit 10 outputs the “down” uplink transmission power control signal 11 and operates to lower the uplink transmission power of the transmitter 12. is doing. Since the uplink signal reception environment varies from base station to base station, the uplink signal interference power often varies independently from slot to slot as shown in FIG. Note that the symbols and symbols in FIG. 24 represent the following contents.
  • the SIR of the received signal of one of the base stations must satisfy the target SIR for each slot. Can do. However, in multiple frame periods (for example, decoding periods), reception quality cannot be satisfied for any base station, and all base stations in communication fail to decode uplink signals. If all the base stations in communication fail to decode the uplink signal, the uplink data cannot reach RNC2, and the uplink communication quality deteriorates.
  • Non-Patent Document 1 “W—CDMA mobile communication system”, Maruzen Co., Ltd., supervised by Keiji Tachikawa, 5th edition (p. 63-p. 68)
  • the present invention has been made to solve the above-described problem, so that a base station in communication does not interfere with decoding of an uplink signal in a plurality of frame periods. It is an object of the present invention to obtain a transmission power control apparatus and method for a mobile device that maintains uplink communication quality.
  • the transmission power control apparatus for a mobile device generates an uplink transmission power control signal by combining uplink transmission power control commands received from each base station when communicating with a plurality of base stations.
  • the uplink transmission power command is sent at a constant cycle based on the information related to the communication of each base station in the communication state.
  • the base station to be combined is selected.
  • the present invention since base stations having good uplink communication quality are selected at a constant cycle such as a decoding cycle, and uplink transmission power control commands corresponding to those base stations are selected and combined, communication is in progress.
  • This base station does not interfere with decoding of uplink signals in a plurality of frame periods, and can always maintain uplink communication quality.
  • FIG. 1 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 1 of the present invention.
  • FIG. 2 is an explanatory diagram showing a decoding frame period according to each embodiment of the present invention.
  • FIG. 3 shows an operation procedure of the TPC combining target base station selecting unit according to the first embodiment of the present invention. It is a flowchart.
  • FIG. 4 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the second embodiment of the present invention.
  • FIG. 6 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 3 of the present invention.
  • FIG. 7 is a flowchart showing an operation procedure of a TPC synthesis target base station selection unit according to the third embodiment of the present invention.
  • FIG. 8 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 4 of the present invention.
  • FIG. 9 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the fourth embodiment of the present invention.
  • FIG. 10 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 5 of the present invention.
  • FIG. 11 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the fifth embodiment of the present invention.
  • FIG. 12 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 6 of the present invention.
  • FIG. 13 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the sixth embodiment of the present invention.
  • FIG. 14 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 7 of the present invention.
  • FIG. 15 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the seventh embodiment of the present invention.
  • FIG. 16 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 8 of the present invention.
  • FIG. 17 shows an operation procedure of the TPC combining target base station selection unit according to the eighth embodiment of the present invention. It is a flowchart.
  • FIG. 18 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 9 of the present invention.
  • FIG. 19 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the ninth embodiment of the present invention.
  • FIG. 20 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 10 of the present invention.
  • FIG. 21 is a flowchart showing an operation procedure of the TPC combining target base station selection unit according to the tenth embodiment of the present invention.
  • FIG. 22 is an explanatory diagram showing a schematic configuration of a mobile communication system in which a mobile device communicates with a plurality of base stations.
  • FIG. 23 is a block diagram showing a functional configuration of an uplink transmission power control apparatus of a conventional mobile device.
  • FIG. 24 is an explanatory diagram showing a conventional method of combining uplink transmission power control commands.
  • FIG. 1 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 1 of the present invention, and represents a part for combining uplink transmission power control commands.
  • the receiver 7 receives the downlink signals 4, 3 from the plurality of base stations 3, 3,.
  • Power control commands 9, 9, ..., 9 are TPC (Transmit Power Control)
  • the downlink dedicated channel (DPCH) signal for each base station after despreading is given to the corresponding downlink DPCH reception quality measurement units 13, 13,.
  • one frame includes 15 slots (# 0 to # 14).
  • decoding is performed in units of four frames. This is referred to as a “decoded frame period”.
  • the decoded frame period may be 4, 8, 16,.
  • “Decoding period first slot” indicates “Slot # 0”, the second frame “Slot # 0,”, the third frame “Slot # 0,”, the fourth frame "Slot # 0 ,," is not the first slot.
  • the TPC combining target base station selection unit 15 averages the reception quality of the downlink individual channels for each base station over the decoding frame period, and calculates the first slot of the decoding period (“Slot in FIG. 2). # 0 ”), the base station to be combined with the uplink transmission power control command is selected, and the downlink signal despreading units 8, 8,...
  • FIG. 3 shows a process executed by the TPC combining target base station selection unit 15 every slot.
  • step ST1 reception quality averaging processing is performed (step ST1). If it is “Decoding period first slot (SlotO in FIG. 2)”, the process proceeds to step ST3. If it is not “Decoding period first slot (SlotO in FIG. 2)”, the TPC combining target base station selection unit The processing for each 15 slots is terminated (step ST2).
  • step ST3 When the first slot of the decoding cycle (SlotO in Fig. 2), m base stations (m is a smaller number than the base station in communication) with good downlink reception quality are connected to the uplink transmission power control command.
  • the combination unit 10 selects the transmission power control command as a synthesis target (step ST3). Thereafter, the average value of the reception quality of the downlink dedicated channel obtained in the process of step ST1 is initialized (step ST4).
  • TPC combining target base station selecting section 15 combines the uplink transmission power control command of the selected base station to generate uplink transmission power control signal 11, Give to the transmitter.
  • the transmitter 12 controls uplink transmission power according to the uplink transmission power control signal 11.
  • the mobile station measures the communication quality by measuring and averaging the downlink reception quality of each base station in a decoded frame period including a plurality of frames. It is possible to select a base station with a stable signal quality.
  • the TPC from each base station is referred to, and if a “down” is instructed from any base station in a certain slot, the mobile station reduces the uplink transmission power. Since the present invention evaluates the downlink link quality of each base station in units including a plurality of frames, it is possible to eliminate the influence of temporary communication quality fluctuations. Also, a base station with good communication quality is selected from a plurality of base stations, and the uplink transmission power control command is evaluated in the “uplink transmission power control command combining unit 10”. Uplink transmission power control can be performed based on the power control command, and uplink communication quality can be improved.
  • FIG. 4 is a block diagram showing a functional configuration of the uplink transmission power control apparatus for a mobile station according to Embodiment 2 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 4 is different from FIG. 1 in that a downlink power controller 17 is newly provided.
  • the downlink power control unit 17 transmits the downlink DPC H transmission power control command 18 to the base station to control the downlink transmission power.
  • the downlink DPCH transmission power control command 18 is transmitted to the TPC combining target base station. This is given to the selector 15. Also, in this example, the downlink DPCH reception quality measurement units 13, 13,...
  • the TPC combining target base station selection unit 15 in this Embodiment 2 has m base stations (m is less than the base station in communication) with good follow-up to the downlink DPCH transmission power control command transmitted by the mobile station. , Number) is selected by the uplink transmission power control command combining unit 10 as a base station to be combined with the uplink transmission power control command.
  • FIG. 5 shows the processing for each slot in the TPC combining target base station selection unit 15 in the second embodiment.
  • step ST21 The difference from the received power before the lot, that is, the power difference between slots is calculated (step ST21).
  • the power difference between each slot is compared with the downlink transmission power control command transmitted to the base station (step ST22), and if they match, the downlink transmission power control tracking index (information related to communication) is given (step information). ST23).
  • step ST24 When “Decoding period first slot (SlotO in FIG. 2)” is selected, the process proceeds to step ST24.
  • other than “Decoding period first slot (SlotO in FIG. 2) the TPC synthesis target base station is selected.
  • the processing for each slot of the unit 15 is terminated (step ST24).
  • step 2 2) is selected, the top m base stations (m is a smaller number than the base station in communication) are selected in descending order of the downlink transmission power control tracking index. ST25). Thereafter, the used downlink transmission power control tracking index is initialized and the process is terminated (step ST26).
  • a base station with a large downlink transmission power control tracking index that is, a base station with good tracking capability for the downlink transmission power control command can estimate that there are few demodulation errors in the downlink transmission power control command, so the reception state of the uplink signal is good. Can be thought of as something.
  • the followability of the downlink transmission power control command transmitted from the mobile device to the base station is better.
  • the “uplink transmission power control command combining unit 10” can evaluate the uplink transmission power control command of the base station having a good uplink signal reception state. That is, uplink transmission power control can be performed based on an uplink transmission power control command with good base station power, so that uplink communication quality can be improved.
  • FIG. 6 is a block diagram showing a functional configuration of the uplink transmission power control apparatus for a mobile station according to Embodiment 3 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration shown in FIG. 6 replaces the downlink DPCH reception quality measurement unit shown in FIG. 1 with antenna verification units 20, 20,.
  • the feedback information generation unit 19 and the antenna verification units 20, 20, 20 are defined in 3GPP.
  • the base station performs transmission diversity.
  • Transmit diversity H is a technology that performs transmission using two antennas.
  • the base station performs transmission using two antennas for uplink reception diversity.
  • TxDiv Closed Loop Mode 1 Non-patent Document 1 “3-3 Radio Access Interface Standard 1 Transmission Diversity (iii) Closed Mode” ⁇ .135 to ⁇ .140 or 3GPP TS25. 214 Refer to 7. 1) for mobile stations communicating with base stations.
  • a plurality of base stations having good follow-up to a command that indicates to the base station the phase angle of the individual channel of antenna 2 with respect to the common channel under antenna 2
  • the frame cycle (for example, the decoding cycle) is selected as a synthesis target for the uplink transmission power control command.
  • the feedback information generation unit 19 instructs the base station to specify the DPCH phase of the antenna 2 with respect to the CPICH of the antenna 2 so that the DP CH received power after combining the antenna 1 and the antenna 2 on the mobile station side becomes large.
  • Antenna verification units 20, 20,..., 20 are antennas for the downlink common channel of antenna 2.
  • the TPC combining target base station selection unit 15 in this Embodiment 3 has m base stations that are good in tracking the feedback information (FBI) transmitted by the mobile station (m is a number smaller than the base station in communication). ) Is selected by the uplink transmission power control command combining unit 10 as a base station to be combined with the uplink transmission power control command.
  • FBI feedback information
  • FIG. 7 shows the processing for each slot in the TPC combining target base station selection unit 15 in the third embodiment.
  • step ST32 Give feedback information (FBI) tracking index (information related to communication) (step ST32).
  • FBI feedback information
  • the process proceeds to step ST34.
  • the TPC synthesis target base station is selected.
  • the processing for each slot of the unit 15 is terminated (step ST33).
  • the first slot of the decoding cycle (SlotO in Fig. 2), the feedback information follow-up index is large, and the top m (m is in communication) A smaller number of base stations than the number of base stations is selected (step ST34). Thereafter, the used FBI tracking index is initialized and the process is terminated (step ST35).
  • a base station with a large feedback information tracking index that is, a base station with good tracking performance for feedback information (FBI) is estimated to have little demodulation error of feedback information (FBI), so the reception state of the uplink signal is good.
  • FBI feedback information
  • the mobile station when the mobile station transmits feedback information indicating the phase angle of the downlink individual channel with respect to the common channel, the mobile station transmits to the base station.
  • the “uplink transmission power control command combining unit 10” transmits the uplink transmission power control command of the base station with a good uplink signal reception state. Can be evaluated. In other words, even when the uplink communication quality varies between base stations, the uplink transmission power can be controlled based on the uplink transmission power control command from the base station with good quality, so that the uplink communication quality can be improved. .
  • FIG. 8 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 4 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 8 is characterized by the processing of the power TPC combining target base station selection unit 15 except for the configuration power downlink DPCH reception quality measurement unit of FIG.
  • the TPC combining target base station selection unit 15 in the fourth embodiment uses m base stations (m is a base station in communication) that requires less uplink transmission power than an uplink transmission power control command for each base station.
  • the uplink transmission power control command combining unit 10 selects a base station to be combined with the uplink transmission power control command.
  • FIG. 9 shows the processing for each slot in the TPC combining target base station selection unit 15 in the fourth embodiment.
  • step ST41 It is checked whether it is a request or not (step ST41), and each result is accumulated (steps ST42 and ST43).
  • step ST42 When the first slot of the decoding cycle (SlotO in Figure 2), go to step ST45 If it is not “the first slot of the decoding cycle (SlotO in FIG. 2)”, the process for each slot of the TPC combining target base station selection unit 15 ends (step ST44).
  • “Decoding period start slot (SlotO in Fig. 2)” the upper m (m is the base station in communication) in order of increasing cumulative value (information related to communication) of multiple frame periods of the uplink transmission power control command. Select fewer base stations) (step ST45).
  • a base station with a small accumulated power S of multiple frame periods in the uplink transmission power control command is a base station that requires a small amount of uplink signal power, but the reception state of the uplink signal of the base station is in other communication It tends to be relatively better than the base station.
  • the "uplink transmission power control command combining unit 10" receives the uplink signal reception state. It is possible to evaluate an uplink transmission power control command of a base station with good quality. In other words, since uplink transmission power control can be performed based on an uplink transmission power control command with good quality base station power, it is possible to improve uplink communication quality even when there is a variation in communication quality between base stations. it can. In addition, by following the uplink transmission power control command of the base station that requires less power, communication with less uplink transmission power becomes possible, and consumption of radio resources can be suppressed.
  • FIG. 10 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 5 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 10 is obtained by removing the downlink DPCH quality measurement unit from the configuration of FIG. 1 and providing a cell level measurement unit 23 instead.
  • the cell level measurement unit 23 is an existing function, which measures the received power of the base station common channel and measures the measured received power and the base station common channel transmitted to the mobile station through broadcast information or control channel. This is a means for calculating a transmission path path (path loss) 31 between the base station and the mobile station based on the transmission power.
  • path loss path loss
  • the TPC combining target base station selection unit 15 of this Embodiment 5 performs uplink transmission power control on m base stations (m is a smaller number than the communicating base station) with a small transmission path loss (path loss). command
  • the combining unit 10 selects the base station to be combined with the uplink transmission power control command.
  • FIG. 11 shows the processing for each slot in the TPC combining target base station selection unit 15 in the fifth embodiment.
  • the transmission path port 24 between each base station and mobile station calculated by the cell level measurement unit 23 is averaged (step ST51). If it is “Decoding period first slot (SI otO in FIG. 2)”, the process proceeds to step ST53. If it is not “Decoding period first slot (SlotO; in FIG.
  • TPC synthesis target base station TPC synthesis target base station
  • the processing for each slot of selection unit 15 is terminated (step ST52).
  • the top m m is the base station in communication
  • Select fewer base stations than the number of stations step ST53.
  • the average value of the used transmission path loss is initialized and the process is terminated (step ST54). In this case, it can be considered that the base station with a small transmission path loss has a good reception state of the uplink signal.
  • the transmission path loss between the base station and the mobile station calculated from the measured reception power of each base station and the transmission power of the common channel of the base station.
  • the “uplink transmission power control command combining unit 10” can evaluate the uplink transmission power control command of the base station having a good uplink signal reception state. That is, uplink transmission power control can be performed based on an uplink transmission power control command with good base station power, so that uplink communication quality can be improved.
  • FIG. 12 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 6 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 12 is obtained by removing the downlink DPCH quality measurement unit from the configuration of FIG. 1 and providing a base station and inter-mobile station distance measurement unit 24 instead.
  • the base station / movement period distance measuring unit 24 is a means for measuring the distance between the base station and the mobile device using, for example, a GPS (Global Positioning System).
  • GPS Global Positioning System
  • the TPC combining target base station selecting unit 15 of the sixth embodiment uses m base stations (m is a smaller number than the communicating base station) near the mobile device as an uplink transmission power control command combining unit. In 10, select the base station that is to be combined with the uplink transmission power control command.
  • step ST62 When it is “Decoding period first slot (SlotO in FIG. 2)”, the process proceeds to step ST62.
  • the TPC combining target base station selection unit The processing for each 15 slots is terminated (step ST61).
  • the top m m is Select fewer base stations than the base station in communication (step ST62). In this case, it can be estimated that a base station with a short distance of mobile equipment has a small loss in the transmission path, and therefore, it can be considered that the reception state of the uplink signal is good.
  • the “uplink transmission power control command combining unit 10” can evaluate the uplink transmission power control command of the base station having a good uplink signal reception state. That is, since uplink transmission power control can be performed based on an uplink transmission power control command from a base station with good quality, uplink communication quality can be improved.
  • FIG. 14 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile station according to Embodiment 7 of the present invention.
  • the configuration of FIG. 14 is obtained by removing the downlink DPCH quality measurement unit from the configuration of FIG. 1 and providing a base station / mobile station relative speed measurement unit 25 instead.
  • the base station / mobile device relative speed measurement unit 25 is a means for measuring the relative speed between the base station and the mobile device using, for example, position information by GPS, an estimation result by Doppler shift of the downlink signal of the base station, and the like. .
  • the TPC combining target base station selecting unit 15 of the seventh embodiment uses m base stations (m is a smaller number than the communicating base station) having a low relative speed as uplink transmission power control command combining units 10 Select as the base station to be combined with the uplink transmission power control command.
  • FIG. 15 shows the processing for each slot in the TPC combining target base station selection unit 15 in the seventh embodiment.
  • the process proceeds to step ST72.
  • the TPC combining target base station selection unit The processing for each 15 slots is terminated (step ST71).
  • the top m m is the order in which the relative speed between each base station and the mobile station measured and collected by the base station 'mobile relative speed measurement unit 25 is slow.
  • Select fewer base stations than the base station in communication step ST72). In this case, the base station with a slow relative speed between the base station and the mobile station has a small Doppler shift, and therefore it can be considered that the reception state of the uplink signal is good.
  • the seventh embodiment by selecting a base station having a lower relative speed between the base station and the mobile station in a mobile station that is performing diversity communication with a plurality of base stations.
  • the “uplink transmission power control command combining unit 10” can evaluate the uplink transmission power control command of the base station having a good uplink signal reception state. That is, since uplink transmission power control can be performed based on an uplink transmission power control command with good base station power, it is possible to improve uplink communication quality.
  • FIG. 16 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 8 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 16 is obtained by removing the downlink DPCH quality measurement unit from the configuration of FIG. 1 and providing a Doppler shift measurement unit 26 instead.
  • the Doppler shift estimation unit 26 is a means for measuring the Doppler shift amount 27 for each base station using, for example, a downlink reception signal for each base station.
  • the TPC combining target base station selection unit 15 of Embodiment 8 composes uplink transmission power control command m base stations with a small Doppler shift amount (m is a smaller number than the communicating base station). Section 10 selects the base station that is to be combined with the uplink transmission power control command.
  • FIG. 17 shows the processing for each slot in the TPC combining target base station selection unit 15 in the eighth embodiment.
  • the Doppler shift amount 27 for each base station measured by the Doppler shift estimation unit 26 is averaged (step ST81).
  • the process proceeds to step ST83, and if it is other than “the first slot of the decoding cycle (SlotO in FIG. 2)”, the process for each slot of the TPC combining target base station selection unit 15 is terminated (step ST82).
  • the basis of the top m pieces m is less than the base station in communication
  • the ground station step ST83.
  • the average value of the Doppler shift amount is initialized and the process is terminated (step ST84). Since the same amount of Doppler shift observed by the mobile station is added to the uplink signal received by the base station, in this case, a base station with little degradation in reception performance of the uplink signal due to Doppler shift is selected.
  • the uplink transmission power control command combining unit 10 in a mobile device that is performing diversity communication with a plurality of base stations, by selecting a base station with a smaller average Doppler shift amount, in the uplink transmission power control command combining unit 10 ”, it is possible to evaluate the uplink transmission power control command of the base station with little deterioration in reception performance of the uplink signal due to Doppler shift. In other words, uplink transmission power control can be performed based on an uplink transmission power control command that has little base station reception performance degradation due to Doppler shift, so that uplink communication quality can be improved.
  • FIG. 18 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile device according to Embodiment 9 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration of FIG. 18 is obtained by removing the downlink DPCH quality measurement unit from the configuration of FIG. 1 and providing a frequency deviation measurement unit 28 instead.
  • the frequency deviation measuring unit 28 is a means for measuring the frequency deviation 29 between the reception frequency of the downlink signal for each base station and the reference frequency of the mobile device.
  • the TPC combining target base station selection unit 15 of the ninth embodiment includes m base stations having a small frequency deviation 29 between the reception frequency of the downlink signal and the reference frequency of the mobile device (m is a base station in communication)
  • the uplink transmission power control command combining unit 10 selects a smaller number) as base stations to be combined with the uplink transmission power control command.
  • FIG. 19 shows the processing for each slot in the TPC combining target base station selection unit 15 in the ninth embodiment.
  • the frequency deviation 29 for each base station measured by the frequency deviation measuring unit 28 is averaged (step ST91). If it is “Decoding period first slot (SlotO in FIG. 2)”, the process proceeds to step ST93. If it is not “Decoding period first slot (SlotO in FIG. 2)”, the TPC synthesis target base station is selected.
  • the processing for each slot of unit 15 is terminated (step ST92).
  • the top m base stations (m is the number of base stations in communication) are listed in order of increasing average frequency deviation for each base station. Select (Step ST93).
  • the average value of the used frequency deviation is initialized and the process is terminated (step ST94).
  • the reference signal of the base station having a small frequency deviation between the reception frequency of the downlink signal and the reference frequency of the mobile device has a small frequency deviation force S with respect to the uplink transmission power transmitted by the mobile device. Therefore, it can be considered that the reception performance degradation of the uplink signal due to the frequency deviation is small.
  • the base in a mobile device that is performing diversity communication with a plurality of base stations, the base with the smaller frequency deviation between the reception frequency of the downlink signal and the reference frequency of the mobile device
  • the uplink transmission power control command of the base station With little degradation in uplink signal reception performance due to frequency deviation in the “uplink transmission power control command combining unit 10”. That is, the uplink transmission power can be controlled based on the uplink transmission power control command with the base station power with little deterioration in the reception performance of the uplink signal due to the frequency deviation, so that the uplink communication quality can be improved.
  • FIG. 20 is a block diagram showing a functional configuration of an uplink transmission power control apparatus for a mobile station according to Embodiment 10 of the present invention.
  • functional parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted in principle.
  • the configuration in FIG. 20 is obtained by removing the downlink DPCH quality measurement unit from the configuration in FIG. 1 and providing a communication time measurement unit 30 instead.
  • the communication time measuring unit 30 is a means for measuring the communication time 32 between each base station and the mobile device.
  • the TPC combining target base station selecting unit 15 of the tenth embodiment uses the uplink transmission power control command combining unit 10 to select m base stations having a long communication time (m is a smaller number than the communicating base station). Select as a base station to be combined with the uplink transmission power control command.
  • FIG. 21 shows the processing for each slot in the TPC combining target base station selection unit 20 in the tenth embodiment.
  • step ST101 the TPC combining target base station selection unit The processing for each 15 slots is terminated (step ST101).
  • the first slot of the decoding cycle (SlotO in Fig. 2), the top m pieces in the order of long communication time 31 for each base station measured by the communication time measurement unit 30 (m is a smaller number than the base station in communication) ) Base station (step ST102). In this case, a base station with a long communication time can be considered to be able to communicate stably.
  • uplink transmission power control in a mobile station that is performing diversity communication with a plurality of base stations, by selecting a base station with a longer communication time, "uplink transmission power control"
  • the command combining unit 10 can evaluate the uplink transmission power control command of the base station that can communicate stably. That is, since uplink transmission power control can be performed based on an uplink transmission power control command from a base station that can communicate stably, uplink communication quality can be improved.
  • the mobile device is transmitted at a constant cycle based on information related to communication of each base station in a communication state. Since the base station that synthesizes the transmission power command is selected, the base station in communication does not interfere with the decoding of the uplink signal in multiple frame periods, and it is possible to always maintain the communication quality. Therefore, it is suitable for transmission power control of mobile devices of digital mobile phones that conform to the “IMT-2000” standard.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif de contrôle de puissance d'émission d'un dispositif mobile, lequel génère un signal de contrôle de puissance d'émission de liaison montante en combinant des commandes de contrôle d'émission de liaison montante reçues à partir des stations de base respectives et contrôle la puissance d'émission du signal de liaison montante, conformément au signal de contrôle de puissance d'émission de liaison montante, en communicant avec une multitude de stations de base. Une commande de puissance d'émission de liaison montante est synthétisée au niveau d'un certain cycle, conformément à l'information sur la communication des stations de base respectives où la communication est en cours.
PCT/JP2007/057993 2006-04-11 2007-04-11 Dispositif de contrôle de puissance d'émission d'un dispositif mobile et méthode de contrôle de puissance d'émission Ceased WO2007119752A1 (fr)

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JP2008510967A JP4856174B2 (ja) 2006-04-11 2007-04-11 移動機の送信電力制御装置および送信電力制御方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012527788A (ja) * 2009-05-22 2012-11-08 華為技術有限公司 ユーザ装置及びそのアクセス方法

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO1999037111A1 (fr) * 1998-01-16 1999-07-22 Ntt Mobile Communications Network Inc. Procede de regulation de puissance de transmission, telephone mobile, station de base et support d'enregistrement
JP2002533009A (ja) * 1998-12-11 2002-10-02 ノーテル・ネットワークス・リミテッド Ｄｓ／ｃｄｍａセルラー・システムにおいてソフト・ハンドオフ中に電力制御コマンドを結合するシステムおよび方法
WO2003010903A1 (fr) * 2001-07-24 2003-02-06 Ntt Docomo, Inc. Dispositif et procede pour commande de puissance d'emission dans un systeme de communication mobile, station mobile, et dispositif de communication
JP2006081085A (ja) * 2004-09-13 2006-03-23 Matsushita Electric Ind Co Ltd 移動局装置および上り回線送信電力制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037111A1 (fr) * 1998-01-16 1999-07-22 Ntt Mobile Communications Network Inc. Procede de regulation de puissance de transmission, telephone mobile, station de base et support d'enregistrement
JP2002533009A (ja) * 1998-12-11 2002-10-02 ノーテル・ネットワークス・リミテッド Ｄｓ／ｃｄｍａセルラー・システムにおいてソフト・ハンドオフ中に電力制御コマンドを結合するシステムおよび方法
WO2003010903A1 (fr) * 2001-07-24 2003-02-06 Ntt Docomo, Inc. Dispositif et procede pour commande de puissance d'emission dans un systeme de communication mobile, station mobile, et dispositif de communication
JP2006081085A (ja) * 2004-09-13 2006-03-23 Matsushita Electric Ind Co Ltd 移動局装置および上り回線送信電力制御方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012527788A (ja) * 2009-05-22 2012-11-08 華為技術有限公司 ユーザ装置及びそのアクセス方法

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