WO2006103737A1 - Systeme de communication mobile et terminal mobile - Google Patents

Systeme de communication mobile et terminal mobile Download PDF

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Publication number
WO2006103737A1
WO2006103737A1 PCT/JP2005/005762 JP2005005762W WO2006103737A1 WO 2006103737 A1 WO2006103737 A1 WO 2006103737A1 JP 2005005762 W JP2005005762 W JP 2005005762W WO 2006103737 A1 WO2006103737 A1 WO 2006103737A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
active set
mobile terminal
interference
predetermined threshold
Prior art date
Application number
PCT/JP2005/005762
Other languages
English (en)
Japanese (ja)
Inventor
Hideji Wakabayashi
Koutarou Sugisawa
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP2005/005762 priority Critical patent/WO2006103737A1/fr
Priority to EP10172834.3A priority patent/EP2252105B1/fr
Priority to EP10172839.2A priority patent/EP2252108A3/fr
Priority to PCT/JP2006/301353 priority patent/WO2006103823A1/fr
Priority to JP2007510326A priority patent/JPWO2006103823A1/ja
Priority to KR1020087018824A priority patent/KR100921511B1/ko
Priority to EP10172835.0A priority patent/EP2252106B1/fr
Priority to KR1020077009824A priority patent/KR100864893B1/ko
Priority to EP06712519A priority patent/EP1802161B1/fr
Priority to DE602006017500T priority patent/DE602006017500D1/de
Priority to EP10172838A priority patent/EP2254372A1/fr
Priority to KR1020097004696A priority patent/KR101103213B1/ko
Priority to KR1020077010102A priority patent/KR20070053823A/ko
Priority to AU2006229008A priority patent/AU2006229008C1/en
Priority to US11/666,301 priority patent/US8050222B2/en
Priority to CN200680001161.6A priority patent/CN101053276B/zh
Publication of WO2006103737A1 publication Critical patent/WO2006103737A1/fr
Priority to JP2007021518A priority patent/JP2007151167A/ja
Priority to JP2007272869A priority patent/JP4840326B2/ja
Priority to HK08101904.5A priority patent/HK1111550A1/xx
Priority to AU2009201166A priority patent/AU2009201166B2/en
Priority to JP2010254645A priority patent/JP2011035943A/ja
Priority to JP2011141817A priority patent/JP2011188534A/ja
Priority to US13/172,309 priority patent/US8355375B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection

Definitions

  • the present invention relates to an active set base station for uplink packet communication selected from an active set base station for soft handover in a dedicated channel (receives macro diversity), particularly from a mobile terminal.
  • the present invention relates to a mobile communication system and a mobile terminal that select a non-serving base station having a control function for controlling the transmission power of data in the mobile terminal among a plurality of base stations that receive macro diversity of transmitted data. .
  • the peak of transmission data can be shifted by controlling the transmission timing of each mobile terminal in consideration of the amount of interference by the scheduler of the base station.
  • the amount of interference in the base station could not be controlled, and the power that limited the transmission rate with a certain allowance. If the amount of interference in the base station could be controlled, the margin was reduced and the peak of the transmission data It is also possible to increase the rate.
  • data transmitted from a mobile terminal may reach a plurality of base stations, and base stations other than those responsible for scheduling may receive the data. It is.
  • a base station that is not responsible for scheduling processing but receives data transmitted from a mobile terminal is called a non-serving base station, and a set of base stations that communicate with a single mobile terminal is called an active set. .
  • the power of the transmission data is reduced to cover high error rates with retransmission control with the base station.
  • the mobile terminal transmits data with an excessively high transmission power.
  • a mobile terminal performs wireless communication with a base station, and signal strength and RF Method to measure the performance etc. and adjust the number of active sets by two thresholds (If there is something larger than the first threshold value, select one active set, if there is something larger than the second threshold value, activate it Select two sets).
  • Patent Document 1 merely discloses a technique for limiting the number of active sets by measuring signal strength, RF performance, etc. for the purpose of saving radio resources.
  • Patent Document 2 discloses a method of continuing data communication by improving the line status by performing intracellno and handover when the number of data retransmissions exceeds a certain number.
  • Patent Document 2 in order to improve forced disconnection, an intra cell knockover is merely performed.
  • Patent Document 3 discloses a method in which macro diversity is used when the reception state of a wireless unit is poor, and macro diversity is not used when the reception state is good. However, in Patent Document 3, the amount of uplink interference cannot be adjusted, and the macro diversity effect cannot be obtained.
  • Patent Document 4 discloses a method of reducing the size of an active set by lowering the input / output reference of a base station in an overload state to remove it from the active set.
  • Patent Document 4 is a technique that can be applied only to downlink data transmission and cannot be applied to uplink data transmission.
  • Non-Patent Document 1 describes an E—DCH (Enhanced Dedicated CHannel) active set that is a high-speed packet communication using a scheduler.
  • E—D CH active set the base station A selection method is disclosed. That is, the base station is selected based on DPCCH SIR (Signal to Interference Ratio) measured by the base station indicating the quality of the uplink transmission path or E-DPCCH BLER (BLock Error Rate).
  • DPCCH SIR Signal to Interference Ratio
  • E-DPCCH BLER Battery Error Rate
  • the quality of the uplink transmission line is an important factor in selecting the E—DCH active set.
  • the amount of interference of the base station needs to be considered.
  • Non-Patent Document 1 the allowance for the interference amount of the non-serving base station is taken into consideration. In addition to the base station selection method, the base station is selected without considering the signaling load.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-95031
  • Patent Document 2 Japanese Patent Laid-Open No. 2002-77982
  • Patent Document 3 Japanese Patent Laid-Open No. 2001-16633
  • Patent Document 4 Japanese Patent Laid-Open No. 2001-197536
  • Non-Patent Document 1 3GPP RANI Document R2-042357
  • the base station in charge of scheduling uses the power of data transmitted from the mobile terminal in consideration of the interference amount of the base station. Power that can be restricted In a base station that is not in charge of scheduling, even if the amount of interference exceeds the allowable amount, the power of data transmitted from the mobile terminal cannot be restricted, and transmission quality may deteriorate. There was a problem.
  • the present invention has been made to solve the above-described problems, and enables a base station whose interference amount exceeds an allowable amount to control the transmission power of data transmitted by the mobile terminal.
  • An object of the present invention is to provide a mobile communication system and a mobile terminal capable of suppressing deterioration of transmission quality.
  • FIG. 1 A configuration diagram showing a mobile communication system according to a first embodiment of the present invention.
  • FIG. 2 A configuration diagram showing a mobile terminal of the mobile communication system according to the first embodiment of the present invention.
  • ⁇ 3] is a configuration diagram showing a base station of a mobile communication system according to Embodiment 1 of the present invention.
  • FIG. 4 is a block diagram showing a base station controller of a mobile communication system according to Embodiment 1 of the present invention.
  • FIG. 5 is an explanatory diagram showing the difference between a conventional active set (active set for soft handover) and an E-DCH active set.
  • FIG. 6 is a flowchart showing the processing contents when the mobile terminal determines whether or not the base station has power to include in the E-DCH active set.
  • FIG. 7 is a conceptual diagram showing the interference amount and interference margin of the base station.
  • FIG. 8 is a channel configuration diagram of a mobile communication system according to embodiment 1 of the present invention.
  • FIG. 9 is a sequence diagram showing a sequence in which the base station notifies the mobile terminal of the interference amount.
  • FIG. 10 is a flowchart showing processing contents for determining whether or not a mobile terminal adds a base station to the E-DCH active set.
  • FIG. 11 is a sequence diagram showing a sequence of the mobile communication system.
  • FIG. 12 is a flowchart showing an E-DCH active set addition process in a mobile terminal.
  • FIG. 13 is a flowchart showing an E-DCH active set deletion process in a mobile terminal.
  • FIG. 14 is a flowchart showing an E-DCH active set addition process in the base station.
  • FIG. 15 is a flowchart showing an E-DCH active set deletion process in the base station.
  • FIG. 16 is a sequence diagram showing a sequence of the mobile communication system when determining whether or not the base station control device is capable of adding the base station to the E-DCH active set.
  • FIG.17 Determines whether the base station controller has the power to add the base station to the E-DCH active set. It is a flowchart which shows the processing content to refuse.
  • FIG. 18 is a flowchart showing the processing contents for determining whether or not the base station controller is capable of adding the base station to the E-DCH active set.
  • FIG. 19 is a flowchart showing processing contents when determining whether or not the mobile terminal has the power to delete the base station from the E-DCH active set.
  • FIG. 20 is a flowchart showing processing contents for determining whether or not the mobile terminal has the power to delete the base station from the E-DCH active set.
  • FIG. 23 is a flowchart showing the processing contents for determining whether or not the base station has the power to delete its own station from the E-DCH active set.
  • FIG. 24 is a flowchart showing the processing contents for changing the E-DCH active set in consideration of the effect of macro diversity.
  • FIG. 25 is a sequence diagram showing a sequence of a mobile communication system when an E-DCH active set is added.
  • FIG. 26 is a flowchart showing the processing contents for determining whether or not the mobile terminal has the power to enhance the effect of macro diversity.
  • FIG. 27 is a sequence diagram showing a sequence of the mobile communication system when deleting an E-DCH active set.
  • FIG. 28 is a flowchart showing the processing contents for determining whether or not the mobile terminal is enhancing the effect of macro diversity.
  • FIG. 29 is a sequence diagram showing a sequence of the mobile communication system when deleting an E-DCH active set.
  • FIG. 30 is a flowchart showing processing contents for determining whether or not the base station control device is enhancing the effect of macro diversity.
  • FIG. 1 is a block diagram showing a mobile communication system according to Embodiment 1 of the present invention.
  • mobile terminal 1 is a terminal such as a mobile phone or a mopile PC used by a user.
  • the serving base station 2-1 has a scheduling function for controlling the transmission timing and transmission power of data in the mobile terminal 1 and receives data transmitted from the mobile terminal 1.
  • Controlling the transmission power here refers to the control of the transmission permission power of the mobile terminal for the purpose of specifying the maximum transmission rate, not the power control in the high-speed closed loop.
  • the non-serving base station 2-2 has a control function for controlling the transmission power of data in the mobile terminal 1 and receives data transmitted from the mobile terminal 1. However, if the data reception status of the non-serving base station 2-2 varies, the base station control device 3 may change the base station to not have the above control function.
  • Base stations 2-3 are active set base stations for soft handover, and receive data transmitted from mobile terminal 1 without maintaining the above control functions. However, if the data reception status at the base stations 2-3 fluctuates, the base station controller 3 may change to a non-serving base station.
  • the base station controller 3 sets the base stations 2-1, 2, 2, 2-3 as serving base stations and non-serving base stations according to the data reception status at the base stations 2-1, 2-2, 2-3. Alternatively, a process of allocating to base stations that do not have the above control functions (softno, base stations of the active set for handover) is performed.
  • the base station control device 3 performs macro diversity in high-speed uplink packet communication.
  • FIG. 2 is a configuration diagram showing the mobile terminal 1 of the mobile communication system according to the first embodiment of the present invention.
  • the modulation unit 11 multiplexes and spreads the signals of the respective channels to obtain the desired The process which modulates to the carrier wave of this is implemented.
  • the power amplifying unit 12 amplifies the carrier wave output from the modulating unit 11 to a desired power. To implement.
  • the antenna 13 transmits a modulated signal, which is a carrier wave amplified by the power amplifier 12, to the serving base station 2-1, the non-serving base station 2-2 and the base station 2-3, while the serving base station 2-1, It receives the modulated signal that is the carrier wave transmitted from the non-serving base station 2-2 and base station 2-3.
  • the low noise amplifying unit 14 performs processing for amplifying a weak modulated signal received from the antenna 13 to a level necessary for demodulation.
  • the demodulator 15 despreads the modulated signal amplified by the low-noise amplifier 14 (despread with the same code as the code spread at the transmission source) and separates it into the original channel signal. .
  • the control unit 16 controls each unit in the mobile terminal 1 and also exchanges data and parameters.
  • the transmission buffer 17 When the transmission buffer 17 receives data input from the control unit 16 by the user, the transmission buffer 17 performs a process of temporarily holding the data.
  • the DPCH transmission unit 18 carries out the process of transmitting the DCH by putting the data held in the transmission buffer 17 and the event generated from the protocol processing unit 41 on the DCH (Dedicated Channel).
  • DCH (Dedicated Phisical CHannel) is the name of the physical layer on which DCH is placed, and includes channels that include everything actually transmitted, including pilot signals and power control commands, in addition to DCH data. means.
  • DCH is a channel for exchanging data individually.
  • DCH is a channel that mainly handles relatively low-rate data such as voice.
  • the power management unit 19 receives the DCH power output from the DPCH transmission unit 18, the AG (Absolute Grant) received from the E-AGCH reception unit 29, and the E-RGCH reception unit 30.
  • a process to calculate the power that can be used for E-DCH (Enhanced DCH) from RG (Relateive Grant) is implemented.
  • E—AGCH is an abbreviation for E-DCH Absolute Grant Channel.
  • E—RGCH is an abbreviation for E-DCH Relative Grant Channel.
  • the transmission rate control unit 20 receives data from the transmission buffer 17 under the direction of the scheduler. Implement the process to control the output.
  • the transmission rate control unit 20 determines the remaining power of the mobile terminal 1 calculated by the power management unit 19 and the allowable power of E-DCH given from the SG (Serving Grant; scheduler) output from the SG management unit 40. Value to be controlled) Force E— TFC I (E-DCH Transport Format and ombination Indicator).
  • the HARQ processing unit 21 performs a process of determining a ratio between systematic bits that are transmission data information and parity bits that are redundant bits.
  • the scheduling request information creation unit 22 performs processing for creating scheduling request information based on the data output from the transmission buffer 17 and the power available for the E-DCH calculated by the power management unit 19. carry out.
  • the encoder unit 23 Based on the RV (Redundancy Version) information output from the retransmission control unit 27, the encoder unit 23 performs processing to encode the mixed output of systematic bits (information bits) and parity bits (error correction bits). carry out.
  • the E-DCH transmission unit 24 performs processing for setting the E-D CH on a physical channel and setting it in a transmittable state in consideration of the RV information output from the retransmission control unit 27.
  • the E—DPCCH transmission unit 25 includes the E—TFCI calculated by the transmission rate control unit 20, the scheduling request information created by the scheduling request information creation unit 22, and the RSN (Retransmissin Sequence Number) output from the retransmission control unit 27. ) Is encoded into a form that can be transmitted.
  • the E-HICH receiving unit 26 performs a process of receiving ACKZNA CK information indicating whether or not the base station 2 has received the E-DCH. What is E—HICH? E-DCH HARQ
  • E-HICH receivers 26 As many E-HICH receivers 26 as the maximum number of active sets of E-DCH are prepared. This number is determined by the nature of mobile terminal 1.
  • the retransmission control unit 27 performs processing for calculating RV and RSN from the ACKZNACK information received by the E-HICH receiving unit 26.
  • RV indicates a combination of systematic bits and parity bits
  • RSN is information indicating the number of retransmissions.
  • the CPICH receiving unit 28 performs reception processing of the common pilot channel, and the common pi The reception level of the lot channel is output to the protocol processing unit 41.
  • the E-AGCH receiving unit 29 performs processing for receiving AG from the serving base station 2-1.
  • the E—RGCH receiving unit 30 performs processing for receiving RG from the serving base station 2-1 or the non-serving base station 2-2.
  • E-RGCH receivers 30 As many E-RGCH receivers 30 as the maximum number of active sets of E-DCH are prepared.
  • the DPCH receiving unit 31 performs a process of receiving a DCH.
  • P—CCPCH receiving unit 32 performs processing for receiving broadcast information.
  • the active set management unit 33 performs processing for confirming the state of the current active set (conventional active set different from the E—DCH active set) from the broadcast information received by the P—CCPCH receiving unit 32.
  • the active set control unit 34 acquires the interference amount of each base station from the P-CCPCH reception unit 32, the E-AGCH reception unit 29, etc., and the interference amount of each base station and the active set management unit 33
  • the control content of the current active set is determined from the confirmed current active set state, and the control content is output to the protocol processing unit 41.
  • the active set control unit 34 receives information on addition of a non-serving base station or deletion of a non-serving base station from the protocol processing unit 41, the active set control unit 34 updates the active set management unit 33 to update the target base station.
  • the E-AGCH receiving unit 29 and the E-RGCH receiving unit 30 are controlled to add or delete.
  • the E-DCH active set management unit 35 obtains the current E-DCH active set state from the P-CCPCH reception unit 32 or the E-DCH active set control unit 38, and the E-DCH active set control unit 38 The current active set is updated according to the instruction.
  • the correlation calculation unit 36 calculates the correlation of the CPICH (Common Pilot Channel) power, which is the common pilot channel received by the CPICH reception unit 28, and sends the correlation of the CPICH power to the E-DCH active set control unit 38. Output.
  • CPICH Common Pilot Channel
  • the response signal counting unit 37 counts the number of receptions of the NACK and sets the number of receptions of the NACK to the E—DCH active set. The process of outputting to the control unit 38 is performed.
  • the E-DCH active set control unit 38 such as the P-CCPCH receiving unit 32 and the E-AGCH receiving unit 29 (interference amount collecting unit), also acquires the interference amount of each base station, and E — Obtain the current E-DCH active set status from the DCH active set management unit 35 and obtain SG from the SG management unit 40 to determine the control content of the E—DCH active set.
  • the control contents are output to the protocol processing unit 41.
  • the step width management unit 39 changes the SG in one step based on the power of the CPICH that is the common pilot channel received by the CPICH reception unit 28 or the path loss output from the protocol processing unit 41 ( Step width) is calculated.
  • the SG management unit 40 determines the V based on the AG received by the E-AGCH reception unit 29, the RG received by the E-RGCH reception unit 30, and the step width calculated by the step width management unit 39. Implement the process of updating.
  • the protocol processing unit 41 constituting the request transmission means performs communication protocol processing.
  • FIG. 3 is a configuration diagram showing the base station 2 of the mobile communication system according to Embodiment 1 of the present invention.
  • the modulation unit 51 multiplexes the signals of the respective channels to spread the power, and A process of modulating to a desired carrier is performed.
  • the power amplification unit 52 performs a process of amplifying the carrier wave output from the modulation unit 51 to a desired power.
  • the antenna 53 transmits a modulated signal that is a carrier wave amplified by the power amplifier 52 to the mobile terminal 1, while receiving a modulated signal that is a carrier wave transmitted from the mobile terminal 1.
  • the low noise amplifying unit 54 performs processing for amplifying the weak modulated signal received from the antenna 53 to a level necessary for demodulation.
  • the demodulator 55 de-spreads the modulated signal amplified by the low-noise amplifier 54 (de-spread with the same code as the code spread at the mobile terminal 1), and separates it into the original channel signal. .
  • the control unit 56 performs control of each unit in the base station 2 as well as data transfer and Control the timing.
  • the protocol processing unit 57 performs communication protocol processing, and performs communication processing between the base station control device 3 and the base station 2.
  • the DPCCH reception unit 58 performs a decoding process on the DPCCH output from the demodulation unit 55.
  • the DPDCH reception unit 59 performs processing for setting the DPDCH output from the demodulation unit 55 into a form that can be decoded.
  • each mobile terminal 1 is prepared.
  • the E—DPCCH receiving unit 60 performs a process of receiving an E—DPCCH (Enhanced Dedicated Physical Control Channel) transmitted from the mobile terminal 1.
  • E—DPCCH Enhanced Dedicated Physical Control Channel
  • the scheduling request information decoding unit 61 performs a process of decoding the E—DPCCH scheduling request information received by the E—DPCCH receiving unit 60.
  • the E DPDCH receiving unit 62 performs E-DCH reception processing, and performs processing to divide into systematic bits as information sources and parity bits as redundant bits.
  • each mobile terminal 1 is prepared.
  • the nota 63 performs a process of temporarily holding the bit output from the E-DPDCH receiving unit 62.
  • the decoding unit 64 performs processing for decoding the DPDCH received by the DPDCH receiving unit 59, and also performs processing for decoding the E-DCH held by the buffer 63 by the E-TFCI received by the E-DPCCH receiving unit 60. carry out. Note that the decoding unit 64 is shared with the DCH.
  • the interference amount measuring unit 65 performs processing for measuring the amount of interference in the base station 2. That is, the amount of interference is measured by removing the signal component based on the received intensity output from the low noise amplifying unit 54 and the pilot in the received signal output from the demodulating unit 55.
  • the SIR calculation unit 66 performs a process of calculating SIR which is a ratio between the DPCCH decoded by the DPCCH reception unit 58 and the interference amount measured by the interference amount measurement unit 65.
  • the TPC command generation unit 67 performs the target SIR and SIR specified by the base station controller 3. Compares the current SIR calculated by the calculation unit 66, generates a TPC command that increases the power if it is lower than the current SIR force target SIR, and decreases the power if the current SIR is higher than the target SIR Generate a command.
  • the interference amount notification unit 68 performs processing for notifying the base station controller 3 of the SIR measured by the interference amount measurement unit 65.
  • the RSN extraction unit 69 performs processing for extracting bits corresponding to RSN from the signal decoded by the decoding unit 64.
  • the E-DCH active set management unit 70 sends the current E-DC H active set from the base station controller 3 or the E-DCH active set control unit 71. Implement the process of collecting status.
  • the E—DCH active set control unit 71 obtains the status of the E—DCH active set collected by the E—DCH active set management unit 70, and the number of signaling measured by the signaling measurement unit 79 ( E—AGCH transmitter 76, E—RGCH transmitter 77, and E—HICH transmitter 78), and the interference amount and E—DCH code power ( Or a transmission rate), and according to these acquisition contents, a request for which mobile terminal 1 should remove the E-DCH active set is output to the protocol processing unit 57.
  • the E-DCH active set management unit 70 is updated to control the addition or deletion of the target mobile terminal 1.
  • the E-RGCH transmission unit 77, the E-HICH transmission unit 78, the E-DPCCH reception unit 60, and the E-D PDCH reception unit 62 are performed.
  • the P—CCPCH transmission unit 72 performs a process of transmitting notification information such as interference amount information notified from the base station control device 3 to the mobile terminal 1.
  • the DPCH transmission unit 73 performs processing for transmitting the DPCCH to the mobile terminal 1.
  • the HARQ control unit 74 determines whether or not the RSN power extracted by the RSN extraction unit 69 is also a retransmission capability. If retransmission is performed, the decoding process is performed by changing the turbo code ratio of the decoding unit 64. For example, the data stored in the buffer 63 is erased. In addition, a process for notifying the upstream scheduler 75 of whether or not the data has been sent is executed.
  • Uplink scheduler 75 includes an interference amount measured by interference amount measuring unit 65, a priority notified from base station control device 3, scheduling request information decoded by scheduling request information decoding unit 61, and HARQ Based on the scheduling release request output from the controller 74, the amount of data for each mobile terminal 1 is adjusted.
  • the E-AGCH transmission unit 76 performs processing for transmitting AG output from the uplink scheduler 75 to the mobile terminal 1.
  • the E-RGCH transmission unit 77 performs a process of transmitting the RG output from the uplink scheduler 75 to the mobile terminal 1.
  • the RG mode even when the base station is a serving base station, processing for transmitting RG to the mobile terminal 1 is performed.
  • the E—HICH transmission unit 78 transmits an ACK to the mobile terminal 1 if the CRC check result of the E—DCH data in the decoding unit 64 is OK, and sends a NACK to the mobile terminal 1 if the CRC check result is NG. Perform processing to send to.
  • the power with which one E-AGCH transmission unit 76, one E-RGCH transmission unit 77 and one E-HICH transmission unit 78 are installed is actually prepared for each mobile terminal 1.
  • the signaling measurement unit 79 performs a process of measuring the number of signaling used in the E-AGCH transmission unit 76, the E RGCH transmission unit 77, and the E-HICH transmission unit 78.
  • FIG. 4 is a configuration diagram showing base station control device 3 of the mobile communication system according to Embodiment 1 of the present invention.
  • control unit 81 controls each part of base station control device 3. To implement.
  • the transmission control unit 82 performs transmission control processing for performing an error-free data link.
  • the radio resource management unit 83 manages radio resources such as frequencies and codes, and manages the amount of interference and load.
  • the interference amount storage unit 84 performs processing for storing the interference amount of the base station 2 being served thereby.
  • the no-loss storage unit 85 performs a process of storing the path loss between the mobile terminal 1 and the base station 2 known to the base station 2 being served.
  • the active set management unit 86 determines which base station 2 has the conventional key for the target mobile terminal 1. Implement the process to manage whether it is active set.
  • the active set control unit 87 determines which base station 2 has power to include in the conventional active set, and performs control to include any base station 2 in the conventional active set.
  • the AG management unit 88 performs a process of storing the AG of the target mobile terminal 1.
  • the E—DCH active set management unit 89 performs processing for managing which base station 2 is the active set of E-DCH for the target mobile terminal 1.
  • the signaling load storage unit 90 performs a process of storing the number of signaling measured by the base station 2.
  • the E—DCH active set control unit 92 determines which base station 2 is included in the E—DCH active set, and performs control to include any base station 2 in the E—DCH active set. To do.
  • a feature of upstream high-speed packet communication that differs from conventional upstream packet communication is the introduction of a scheduler.
  • base station 2 grasps the status of each mobile terminal 1 (for example, data transmission request) and performs scheduling, and mobile terminal 1 transmits data in accordance with instructions from base station 2. .
  • mobile terminal 1 notifies base station 2 of the state in advance, and base station 2 performs scheduling based on the quality of the transmission path, the margin of data transmission power in mobile terminal 1, and the like. Then, the scheduling result is notified to the mobile terminal 1, and the mobile terminal 1 transmits an uplink high-speed packet according to the scheduling result.
  • this uplink high-speed packet communication channel is referred to as E-DCH as compared with conventional uplink packet communication.
  • the mobile station 1 or base station controller 3 may be the change determining entity.
  • Fig. 5 is an explanatory diagram showing the difference between the conventional active set (active set for soft handover) and the E-DCH active set.
  • Base stations 2-3 included in the conventional active set exchange DCH with mobile terminal 1.
  • the E-DCH becomes interference and the E-DCH is not received.
  • base stations included in the active set for E-DCH there are a serving base station and a non-serving base station.
  • the serving base station 2-1 and the non-serving base station 2-2 receive E-DCH in addition to the DCH from the mobile terminal 1.
  • the base stations included in the E-DCH active set are selected from the base stations included in the conventional active set! /.
  • the reason is that the base station included in the conventional active set is synchronized with the pilot included in the DPCCH in the uplink channel, and the phase reference of the signal is determined using the pilot. Otherwise, E-DCH cannot be received! /.
  • the no-loss is attenuated almost in proportion to the distance from the mobile terminal 1 to the base station 2.
  • the CPICH reception level indicates the average loss of the transmission path between the mobile terminal 1 and the base station 2, but it is possible to determine how much room is available for the interference level of the base station 2. This is because they cannot.
  • a condition to be considered when selecting a base station included in the E-DCH active set is a margin (margin) of the interference amount in the base station 2.
  • the base station 2 wants to maintain a function that can reduce the transmission rate (transmission power) of data transmitted from the mobile terminal 1 and prevent an increase in the amount of interference. It is desirable to change base station 2 to a non-serving base station with a small amount of interference.
  • the serving base station 2-1 performs scheduling for the mobile terminal 1.
  • the serving base station 2-1 instructs the transmission rate of the mobile terminal 1 by E-AGCH (E-DCH Absolute Grant Channel) E-RGCH (E-DCH Relative Grant Channel) or the like.
  • E-AGCH E-DCH Absolute Grant Channel
  • E-RGCH E-DCH Relative Grant Channel
  • This E-AGCH is loaded with AG indicating the absolute value of the transmission rate
  • E-RGCH is loaded with a value RG indicating fine adjustment of the transmission rate.
  • the non-serving base station 2-2 does not perform scheduling for the mobile terminal 1, but transmits a command (Down command) requesting the transmission rate to be lowered by E-RGCH to the mobile terminal 1.
  • the serving base station 2-1 and the non-serving base station 2-2 perform macro diversity. If the installation location is different between the serving base station and the non-serving base station, As a software, there is no difference in how to call a certain mobile terminal depending on how it works. That is, even if it is a serving base station for a certain mobile terminal, it may act as a non-serving base station for other mobile terminals.
  • the capacity that can be accommodated in base station 2 is determined by the amount of interference in base station 2.
  • the mobile terminal increases the E-DCH transmission power, and the E-DCH channel power (code power) at the receiving end of the base station also increases. This is an interference component in terms of the overall base station power, and the power (interference margin) allocated to other mobile terminals is reduced.
  • the transmission margin of the mobile terminal other than the serving base station is affected, and the interference margin is reduced by this amount of interference.
  • the non-serving base station needs to transmit the Down command to the mobile terminal 1 to reduce the amount of interference.
  • Base station 2 to be added to the E-DCH active set based on the interference margin measured by base station 2 and the influence of interference on the base station 2 by the power of transmission data in mobile terminal 1 Select.
  • base station 2 is actively changed to a non-serving base station with a small interference margin.
  • FIG. 6 is a flowchart showing the processing contents when the mobile terminal 1 determines whether or not the base station includes the base station in the E-DCH active set.
  • the mobile terminal 1 performs soft handover with the serving base station 2-1 and the non-serving base station 2-2 and the base station 2-3!
  • the mobile terminal 1 receives the interference amount information indicating the interference amount of the base station 2-3 from the base station 2-3. (Step ST1).
  • the interference amount information is information indicating how much power the base stations 2 to 3 receive in total. For example, from the transmission allowable power (maximum power) in the base stations 2 to 3 This is the power (interference margin) obtained by subtracting the total received power including the interference power from other base stations, thermal noise, and the received power from the mobile terminal 1 in its own base station.
  • the total received power is used to determine the interference margin, but instead of the total received power, the uplink interference power obtained by subtracting the received power from the mobile terminal 1 in its own base station from the total received power is used. Does not help.
  • FIG. 7 is a conceptual diagram showing the interference amount and interference margin of the base station.
  • thermal noise is noise such as antenna thermal noise
  • other cell interference is the amount of interference from other base stations.
  • thermal noise and other cell interference cannot be distinguished at the base station.
  • the interference margin is obtained by subtracting the total reception power from the uplink reception allowable power.
  • UE is a mobile terminal; an abbreviation meaning User Equipment
  • Received power code power
  • Power control is enabled by the closed loop, and the DPCCH pilot power is adjusted to the target value at the base station end.
  • E- DCH received power is specified as an offset to the DPCCH and is therefore subject to power control ing.
  • Power control force In order to compensate for attenuation due to S path loss, a high reception power of E-DCH at the base station end means that the transmission rate at mobile terminal 1 is high.
  • the other code powers UE2 and UE3 in this base station are interference.
  • the mobile terminal 1 Upon receiving the interference amount information from the base station 2-3, the mobile terminal 1 adds the interference amount of the base station 2-3 indicated by the interference amount information and the base station to the E-DCH active set.
  • the threshold value A which is a judgment criterion, is compared (step ST2).
  • the threshold A serving as a determination criterion is obtained by signaling from the base station 2. Alternatively, it is calculated by the E-DCH active set control unit of mobile terminal 1 or base station 2. [0068] If the interference level of the base stations 2-3 is less than the threshold A, the mobile terminal 1 needs to transmit the Down command when the base station 2-3 has a small amount of interference. Since base stations 2 and 3 are not added to the E-DCH active set, the current E-DCH active set is maintained.
  • the amount of interference that the mobile terminal 1 has on the base stations 2-3 (Including signal) (Step ST3).
  • the mobile terminal 1 can obtain the transmission rate.
  • a mobile terminal 1 having a larger power (code power) that affects the base stations 2-3 has a greater influence on the amount of interference of the base stations 2-3. For this reason, in order to reduce the amount of interference of the base stations 2-3, it is desirable to reduce the transmission power of the mobile terminal 1 that has a large influence on the base stations 2-3, that is, the mobile terminal 1 having a large code power.
  • the transmission power of the mobile terminal 1 is controlled by the serving base station 2-1 that performs scheduling.
  • the E-DCH active set control unit 38 of the mobile terminal 1 uses the code power based on the SG and path path, which are values for controlling the allowable power of the E-DCH given by the serving base station 2-1. Can be calculated.
  • the code power can be calculated using AG instead of SG.
  • This AG is signaled from the serving base station 2-1 via the base station controller 3.
  • mobile terminal 1 When mobile terminal 1 obtains code power as the amount of interference given to base stations 2-3, it compares the code power with threshold value B, which is a criterion for adding a base station to the E-DCH active set. (Step ST4).
  • the threshold value B serving as a determination criterion is obtained by signaling from the base station 2. Alternatively, it is calculated by the E-DCH active set control unit of mobile terminal 1 or base station 2. [0072] If the code power does not reach the threshold B, the mobile terminal 1 has almost no influence on the surrounding base station 2, so the base station 2-3 is not added to the E-DCH active set. Maintain current E—DCH active set.
  • the code power is greater than or equal to threshold B, it has a significant effect on neighboring base stations 2, so base stations 2-3 are added to the E-DCH active set and base stations 2-3 are not served. By changing to a base station, it is necessary for base stations 2-3 to reduce the transmission power of mobile terminal 1.
  • the mobile terminal 1 when the code power is equal to or higher than the threshold B, the mobile terminal 1 generates an additional event requesting that the base station 2-3 is added to the E-DCH active set (step ST 5).
  • the mobile terminal 1 When the mobile terminal 1 generates an additional event as described above, the mobile terminal 1 places the additional event on the DCH and transmits the additional event to the base station control apparatus 3 via the base station 2-3.
  • the base station controller 3 When the base station controller 3 receives an additional event requesting that the mobile station 1 adds the base station 2—3 to the E—DCH active set, the base station controller 3 adds the base station 2—3 to the E—DCH active set. Then, base stations 2-3 are changed to non-serving base stations.
  • the base station 2-3 can perform the process of transmitting the Down command to the mobile terminal 1. If the Down command is transmitted to the mobile terminal 1, the base station 2-3 suppresses its own received power below the allowable power and reduces the amount of interference. Can be reduced.
  • the power shown for comparing the code power and the threshold B is the transmission rate (transmission power) of the mobile terminal 1 and the regulation standard C (E—DCH allowable power and the amount of interference between the base stations 2-3. Additional event that requires mobile station 1 to add base station 2-3 to the E-DCH active set when the transmission rate is equal to or greater than regulatory standard C. Let's generate.
  • FIG. 8 is a channel configuration diagram of the mobile communication system according to Embodiment 1 of the present invention.
  • CPICH is a channel that broadcasts the timing reference to the mobile terminal
  • P-CCPCH Primary-Common Control Physical Channel
  • DCH is a channel for exchanging data individually, and is a channel for handling data mainly at a relatively low rate such as voice.
  • E-DPCCH is a channel that controls uplink high-speed packets
  • E-DCH is a data channel that performs uplink high-speed packet communications.
  • E-AGCH is a downlink channel that determines the transmission rate of uplink high-speed packets, and is transmitted to a mobile terminal that serves as a serving base station.
  • E-RGCH is a downlink channel that transmits a request to reduce the transmission rate of uplink high-speed packets, and is transmitted from a non-serving base station to a mobile terminal. Serving base station power is also transmitted in RG mode.
  • E-HICH E-DCH Hybrid ARQ Indicator Channel
  • FIG. 9 is a sequence diagram showing a sequence in which the base station notifies the mobile terminal of the interference amount
  • Fig. 10 shows the processing contents for the mobile terminal to determine whether or not to add the base station to the E-DCH active set.
  • FIG. 11 is a flowchart showing a sequence of the mobile communication system.
  • the mobile station 1 When determining whether the mobile terminal 1 has the power to add the base station 2-3 to the E-DCH active set, for example, the mobile station 1 is notified of the amount of interference from the base station 2-3. There is a need.
  • the interference amount measuring unit 65 of the base station 2-3 measures all interference amounts in the base stations 2-3 and calculates the total of all interference amounts (step ST11).
  • the interference amount notification unit 68 of the base station 2-3 notifies the base station control device 3 of interference amount information indicating the interference amount (step ST12)
  • the transmission control unit 82 of the base station control device 3 receives the interference amount information from the base stations 2-3, the transmission control unit 82 transmits the interference amount information to the mobile terminal via the P-CCPCH transmission unit 72 of the base station 2-3. 1 is notified (step ST13).
  • the conventional notification method eg, 3GPP release 99
  • the base station 2-3 may notify the mobile terminal 1 of the interference amount information directly.
  • the base station 2-3 directly notifies the mobile terminal 1 of the interference amount information, there is an advantage that the interference amount information can be notified promptly through the base station control device 3.
  • the interference amount measuring unit 65 of the base station 2-3 determines the sum of all interference amounts from the maximum allowable power. Calculate the interference margin by subtracting, and notify the mobile terminal 1 of the interference margin.
  • the E—DCH active set management unit 35 of the mobile terminal 1 is still included in the E—DCH active set among the base stations included in the conventional active set (active set for soft handover). Then, a base station is selected (step ST21).
  • the P-CCPCH reception unit 32 of the mobile terminal 1 receives the interference amount information transmitted from the base station 2-3. (Step ST22).
  • the E—DCH active set control unit 38 of the mobile terminal 1 receives the interference amount restriction criterion A (the threshold value that is the above-described determination criterion). (Corresponding to A) is calculated (step ST23).
  • the E-DCH active set control unit 38 of the mobile terminal 1 performs the base station 2 indicated by the interference amount information.
  • E—DCH active set control unit 38 has the interference level of base stations 2-3 exceeding the regulation standard A! Otherwise, it is not necessary to add base stations 2-3 to the E-DCH active set!
  • the allowable power of E-DCH is acquired from the SG management unit 40 (step ST25).
  • the E-DCH active set control unit 38 shows the power to compare the interference level of the base station 2-3 with the restriction standard A.
  • the interference margin Compare the regulation standards (regulation standards for interference margins).
  • the E-DCH active set control unit 38 acquires the allowable power of the E-DCH, the allowable power and the interference power of the base stations 2-3 also calculate the transmission rate restriction reference C (step ST26).
  • This transmission rate regulation C is a large value proportional to the interference margin, which is the difference between the allowable power of E-DCH and the amount of interference of base stations 2-3.
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the transmission rate of the mobile terminal 1 with the regulation criterion C (step ST27).
  • the E—DCH active set control unit 38 does not need to add the base stations 2-3 to the E—DCH active set. finish.
  • the E—DCH active set control unit 38 includes the maximum number of base stations 2 included in the E—DCH active set (for example, 3 In step ST28, it is determined whether or not the force is exceeded.
  • transmission rate check in steps ST25 to ST27 is an optional process, and the process may directly move from step ST24 to step ST28.
  • the protocol processing unit 41 of the mobile terminal 1 determines whether the number of base stations included in the E-DCH active set control unit 38 exceeds the maximum number V? If so, an additional event is generated requesting that base stations 2-3 be added to the E-DCH active set (step ST29). [0088] When the number of base stations included in the E-DCH active set exceeds the maximum number, the E-DCH active set control unit 38 of the mobile terminal 1 receives the current E from the P-CCPCH receiving unit 32. — Get the amount of interference of non-serving base stations 2-2 included in the DCH active set (step ST30).
  • the non-serving base station included in the EDCH active set is only the non-serving base station 2-2, and there may be multiple non-serving base stations. In the case, the interference amount of a plurality of non-serving base stations is acquired.
  • the E—DCH active set control unit 38 compares the interference amount of the non-serving base station 2-2 with the interference amount of the base station 2-3 (step ST31). When multiple non-serving base stations are included, the minimum amount of interference in multiple non-serving base stations is compared with the amount of interference in base stations 2-3.
  • the protocol processing unit 41 of the mobile terminal 1 determines that the E—DCH active set control unit 38 determines that the interference amount of the non-serving base station 2-2 is larger than the interference amount of the base station 2-3. , Keep current E—DCH active set.
  • the current E-DCH active set It includes a non-serving base station 2-2 and generates a replacement event (update event) requesting that base station 2-3 be added to the E—DCH active set (step ST32).
  • the DPCH transmission unit 18 of the mobile terminal 1 transmits the addition event or the exchange event generated from the E-DCH active set control unit 38 to the base station control device 3 (step ST33).
  • the power shown by mobile terminal 1 for determining the addition of the E-DCH active set based on the interference amount of base stations 2-3 is shown. Based on the above, it may be determined whether an E-DCH active set is added.
  • the pseudo SIR is equivalent to the signal-to-interference ratio at the base station 2-3 end, and can be estimated from the amount of interference notified from the base station 2-3 in advance to the mobile terminal 1 and the path loss. It is the ratio of the uplink received power of the base stations 2-3.
  • the SIR of any one of the base stations 2 can be guaranteed, the power is not increased any more, so the signal strength is always the same in each base station 2. Don't be. In other words, even if the interference is weak, the signal may be weak, and even if such a base station 2 is added to the E-DCH active set just because the interference is low, a reception error will occur if the signal is weak. It is likely to cause.
  • the base station 2 to be added to the E-DCH active set is determined based on the pseudo SIR based on the interference amount of the base station 2 alone, the base station considering not only the interference amount but also the reception quality. 2 can be included in the E—DCH active set. This makes it possible to achieve both interference amount control and macro diversity effect.
  • the “interference amount” in FIG. 10 is replaced with the “pseudo SIR”.
  • the pseudo SIR is a value obtained by dividing the pseudo uplink received signal by the amount of interference.
  • the mobile terminal 1 transmits an E-DCH active set addition event or replacement event to the base station control device 3 (step ST41 in FIG. 11)
  • the radio resources of the base station control device 3 are transmitted.
  • the management unit 83 receives the E-DCH active set addition event or replacement event (step ST42).
  • the radio resource management unit 83 of the base station controller 3 Upon receiving the E—DCH active set addition event or replacement event, the radio resource management unit 83 of the base station controller 3 transmits an E—DCH active set addition request or replacement request to the base station 2 (step ST43).
  • E-DCH active set tracking request is sent to the base station 2-3, but from the E-DCH active set.
  • E—DCH active set replacement request is sent to base station 2—3 and non-serving base station 2 — Send to 2.
  • base stations 2-3 are added to the E-DCH active set.
  • the signaling measuring unit 79 of the base station 2-3 receives the request for adding the E-DCH active set from the base station control device 3, the signaling load (E-AGCH transmitting unit 76, E-RG CH transmitting unit 77). And E—Measure the number of sidering used in the HICH transmitter 78).
  • the protocol processing unit 57 of the base station 2-3 determines whether or not the signaling load has a margin (step ST44). For example, it is determined whether or not there is a margin by determining whether or not the number of signaling currently in use has reached a predetermined number.
  • the protocol processing unit 57 of the base station 2-3 indicates that the E-DCH active set cannot be added because the signaling is currently insufficient.
  • the control device 3 is notified (step ST45), and the process is terminated.
  • the base station controller 3 is notified that the E-DCH active set can be added (step ST46).
  • the transmission control unit 82 of the base station controller 3 determines that the E—DCH active set control unit 92 can add the E—DCH active set
  • the transmission control unit 82 issues an instruction to add the E—DCH active set to the base station 2. — Send to 3 (step ST48).
  • the protocol processing unit 57 of the base station 2-3 Upon receiving an instruction to add an E-DCH active set from the base station controller 3, the protocol processing unit 57 of the base station 2-3 performs an E-DCH active set addition process (step ST49). ).
  • the protocol processing unit 57 of the base station 2-3 When the protocol processing unit 57 of the base station 2-3 performs the E-DCH active set addition process, it notifies the base station controller 3 of the completion of the addition process (step ST50).
  • the transmission control unit 82 of the base station controller 3 When the transmission control unit 82 of the base station controller 3 receives a notification of completion of the additional processing from the base stations 2-3, the transmission control unit 82 sends an instruction to add the E-DCH active set to the mobile terminal 1 via the base stations 2-3. Send (step ST51).
  • the protocol processing unit 41 of the mobile terminal 1 is connected to the base station controller 3 by the P-CCPCH receiving unit 32.
  • the E-DCH active set is added (step ST52), and the completion of the addition is notified to the base station controller 3 (step ST53).
  • FIG. 12 is a flowchart showing the E-DCH active set addition process in the mobile terminal 1.
  • the protocol processing unit 41 of the mobile terminal 1 sends an E-DCH active set addition request to the E-DCH active set control. Output to unit 38 (step ST61).
  • the E-DCH active set management unit 35 manages the current E-DCH active set management unit 35.
  • Update the state of the DCH active set For example, if it is an additional request to change the base stations 2-3 to non-serving base stations, the E— managed by the E—D CH active set management unit 35— The base station 23 is written to the DCH active set.
  • the E-DCH active set control unit 38 of the mobile terminal 1 updates the state of the current E-DCH active set managed by the E-DCH active set management unit 35, and newly adds a base station.
  • the E-RGCH receiver 30 and the E-HICH receiver 26 that receive data etc. from 2-3 are set significantly (set to an operable state) (step ST63).
  • the protocol processing unit 41 of the mobile terminal 1 notifies the base station control device 3 of the completion of the E-DCH active set addition processing (step ST64).
  • the E-DCH active set control unit 38 of the mobile terminal 1 receives an instruction to replace the E-DCH active set from the base station controller 3 as shown in FIG. For example, when it is necessary to delete the non-serving base station 2-2, the current E—DCH active managed by the E—DCH active set management unit 35 is received (step ST71). Update the set status (step ST72) [0105] For example, if it is a deletion instruction for excluding the non-serving base station 2-2 from the non-serving base station, the E-DCH active set is managed by the E-DCH active set management unit 35. Perform processing to delete non-serving base stations 2-2.
  • the E-RGCH receiving unit 30 and the E-HICH receiving unit 26 that have received data from the non-serving base station 2-2 are set unintentionally (set to an inoperable state) (step ST73).
  • the E—DCH active set control unit 38 may be a replacement request that excludes the non-serving base station 2-2 from the non-serving base station power and changes the base station 2-3 to a non-serving base station. Managed by the E-DCH active set management unit 35, delete the non-serving base station 2-2 from the E-DCH active set, and write the base stations 2-3 into the E-DCH active set. Perform the process.
  • the E-RGCH receiver 30 and E-HICH receiver 26 that have received data from the non-serving base station 2-2 are set inadvertently (set to an inoperable state), and are newly added.
  • the E-RGCH receiver 30 and E-HICH receiver 26 that receive data from the receiving base stations 2 and 3 are significantly set (set to an operable state) (step ST73).
  • the protocol processing unit 41 of the mobile terminal 1 notifies the base station control device 3 of the completion of the E-DCH active set replacement processing or deletion processing (step ST74).
  • E-DCH active set addition processing in the base station 2 will be described in detail.
  • FIG. 14 is a flowchart showing the E-DCH active set addition process in Base Station 2.
  • the protocol processing unit 57 of the base station 2—3 Upon receiving an instruction to add an E—DCH active set from the base station controller 3, the protocol processing unit 57 of the base station 2—3 sends an E—DCH active set additional request to the E—DCH active set control unit 71. (Step ST81).
  • the E-DCH active set control unit 71 of the base station 2-3 receives the request for adding the E-DCH active set from the protocol processing unit 57, the E-DCH active set management unit 70 E—DCH active set status is updated (step ST8 2).
  • the base station 23 is written to the E-DCH active set managed by the E-D CH active set management unit 70. To do.
  • the target E-DCH active set control unit 71 updates the target E-DCH active set control unit 71.
  • the E—RGCH transmission unit 77 and the E—HICH transmission unit 78 that transmit data and the like to the mobile terminal 1 are set significantly (set to an operable state) (step ST83).
  • the E-DCH active set control unit 71 significantly sets the E-DPDCH reception unit 62 and the E-DPCCH reception unit 60 that receive data from the target mobile terminal 1 (in an operable state). (Step ST84).
  • the protocol processing unit 57 of the base station 2-3 notifies the base station control device 3 of the completion of the E-DCH active set addition process (step ST85).
  • FIG. 15 is a flowchart showing the E-DCH active set addition process in Base Station 2.
  • the protocol processing unit 57 of the non-serving base station 2-2 receives an instruction to delete the E—D CH active set from the base station controller 3 (only the deletion instruction accompanying the deletion request of the non-serving base station 2-2).
  • E-DCH active set control unit 71 is requested to delete the E-DCH active set (step ST91).
  • the E-DCH active set management unit 70 manages the E-DCH active set control unit 70.
  • the current E—DCH active set status is updated (step ST92).
  • the E-DCH active set management unit 70 ! the process of deleting the non-serving base station 2-2 from the E-DCH active set is performed.
  • the E-DCH active set control unit 71 of the non-serving base station 2-2 When the current E-DCH active set state managed by the active set management unit 70 is updated, the E- RGCH transmission unit 77 and the E-HICH transmission unit that have transmitted data etc. to the target mobile terminal 1 78 is set unintentionally (set to an inoperable state) (step ST93
  • the E-DCH active set control unit 71 receives data from the target mobile terminal 1 and sets the E-DPDCH reception unit 62 and the E-DPCCH reception unit 60 involuntarily (operation not possible). Set to a possible state (step ST94).
  • the protocol processing unit 57 of the non-serving base station 2-2 notifies the base station controller 3 of the completion of the E-DCH active set deletion process (step ST95).
  • the base station controller 3 connects the plurality of base stations 2 to the non-serving base station or the base station 2 according to the data reception status in the plurality of base stations 2.
  • Base station is changed to a non-serving base station, and the transmission power of data transmitted from mobile terminal 1 can be controlled. As a result, the amount of interference at the base station exceeds the limit. This has the effect of improving the transmission quality.
  • the interference amount margin is strict, and when changing base stations 2-3 to non-serving base stations, the change determining entity is the mobile terminal 1, but the change determining entity is Even the base station control device 3.
  • the change determining entity is the base station controller 3
  • the base station 2 can measure the amount of interference.
  • any base station 2 included in the conventional active set is changed to a non-serving base station, from which mobile terminal 1 It does not matter if the interference has a large impact, but the number of non-serving base stations increases too much, increasing the hardware burden on mobile terminal 1 and base station 2.
  • the code power was measured by receiving the E—DCH in addition to a simple nos loss-based method. The above may be a method of determining whether to leave as a non-serving base station.
  • FIG. 16 is a sequence diagram showing the sequence of the mobile communication system when base station controller 3 determines whether to add base stations 2-3 to the E-DCH active set
  • FIG. FIG. 10 is a flowchart showing processing contents for determining whether or not the device 3 adds the base station 2-3 to the E-DCH active set.
  • the DPCH transmitter 18 of the mobile terminal 1 notifies the base station controller 3 of the path loss information via the base station 2. (Step ST101).
  • the transmission control unit 82 of the base station control device 3 receives path loss information from the mobile terminal 1 (step ST102).
  • Interference amount notification units 68 of all base stations 2 included in the conventional active set notify the base station control device 3 of the interference amounts measured by the interference amount measurement unit 65 (step ST1 03). .
  • the transmission control unit 82 of the base station control device 3 receives interference amounts from all the base stations 2 included in the conventional active set (step ST104).
  • the interference amount notification units 68 of all the base stations 2 included in the conventional active set pass the signaling load measured by the sirennering measurement unit 79 to the base station control device 3. (Step ST105)
  • the transmission control unit 82 of the base station controller 3 receives the signaling load from all the base stations 2 included in the conventional active set (step ST106).
  • the E—DCH active set control unit 92 of the base station controller 3 receives the path loss information, the interference amount, and the signaling load, the base station for the E—DC H active set is received based on the path loss information and the interference amount. It is determined whether or not 2 is added or updated (step ST107). Details of the addition or update determination process will be described later.
  • E— DCH active set control unit 92 terminates the process when base station 2 is not added or updated, but when adding or updating base station 2 to 3, the signaling load of base station 2 to 3 to be added is allowed. It is determined whether or not the force is within the range (step ST108).
  • the transmission control unit 82 of the base station control device 3 performs the serving The base station 2-1 instructs the uplink scheduler 75 to lower the E—DCH transmission rate (step ST109).
  • the E—DCH active set control unit 92 of the base station controller 3 determines that the current E managed by the E—DCH active set management unit 89 when the signaling load of the base station 23 to be added is within the allowable range. — Update the state of the DCH active set (step ST110).
  • ⁇ — managed by the DCH active set management unit 89 ⁇ -executes the process of writing the base station 2-3 to the DCH active set .
  • the transmission control unit 82 of the base station control device 3 issues a ⁇ DCH active set addition instruction (or replacement instruction). Transmit to base stations 2 and 3 (step ST111).
  • Step ST112 Upon receiving an instruction to add an E-DCH active set from the base station controller 3, the protocol processing unit 57 of the base station 2-3, as shown in FIG. 14 or FIG. (Step ST112).
  • the protocol processing unit 57 of the base stations 2-3 performs additional processing of the E—DCH active set, etc.
  • the base station control device 3 is notified of completion of the additional processing or the like (step ST113).
  • the transmission control unit 82 of the base station control device 3 When the transmission control unit 82 of the base station control device 3 receives a notification of completion of the additional processing or the like from the base stations 2-3, it adds an instruction to add an E-DCH active set (or via the base station 2-3) (or A replacement instruction) is transmitted to mobile terminal 1 (step ST114).
  • the protocol processing unit 41 of the mobile terminal 1 receives the E-DCH as shown in FIG.
  • the active set addition process is performed (step ST115), and the completion of the addition process is notified to the base station controller 3 (step ST116).
  • the transmission control unit 82 of the base station controller 3 receives the path loss information of all the base stations 2 included in the conventional active set from the mobile terminal 1 (step ST121).
  • the transmission control unit 82 of the base station control device 3 Upon receiving the path loss information of all the base stations 2, the transmission control unit 82 of the base station control device 3 arranges the base stations 2 included in the active set in ascending order of the path loss, and performs the path loss.
  • the base station 2 having the smallest value is selected as the serving base station 2-1 (step ST122).
  • the transmission control unit 82 of the base station controller 3 determines the interference amount from all the base stations 2 included in the conventional active set. Receive (step ST123).
  • the E—DCH active set control unit 92 of the base station control device 3 is a base station 2 other than the serving base station 2-1 among the base stations 2 included in the conventional active set.
  • the base station 2 whose service is below a certain value is selected as a candidate for a non-serving base station (step ST1 24).
  • the E-DCH active set management unit 89 of the base station controller 3 is still included in the E-DCH active set from the non-serving base station candidates selected by the E-DCH active set control unit 92. Select a non-existing base station (eg, base stations 2-3) (step ST125).
  • a non-existing base station eg, base stations 2-3
  • the E-DCH active set control unit 92 of the base station controller 3 When the network management unit 89 selects the base stations 2-3, it obtains the regulation standard A (corresponding to the threshold A, which is the above-mentioned judgment standard) when adding the base station to the E—DCH active set (step ST126), the interference amount of the base station 2-3 is compared with the regulation standard A (step ST127).
  • the regulation standard A corresponding to the threshold A, which is the above-mentioned judgment standard
  • E—DCH active set control unit 92 has the interference level of base stations 2-3 exceeding the regulation standard A! Otherwise, it is not necessary to add base stations 2-3 to the E-DCH active set!
  • the E—DCH active set control unit 92 includes the maximum number of base stations 2 included in the E-DCH active set when the interference amount of the base stations 2-3 exceeds the regulation standard A. It is determined whether or not the force exceeds the number (for example, 3) (step ST128).
  • the E—DCH active set control unit 92 if the number of base stations 2 included in the E—DCH active set exceeds the maximum number, the base station selected by the E DCH active set management unit 8 9 2—3 is determined as the base station 2—3 to be added to the E—DCH active set (step ST129). In other words, the base station 2-3 selected by the E-DCH active set management unit 89 is determined to be changed to a non-serving base station.
  • the E—DCH active set control unit 92 is included in the current E—DCH active set.
  • the amount of interference of the non-serving base station 2-2 is acquired (step ST130).
  • the non-serving base station included in the EDCH active set is only the non-serving base station 2-2, and there may be multiple non-serving base stations. In the case, the interference amount of a plurality of non-serving base stations is acquired.
  • the E—DCH active set control unit 92 compares the interference amount of the non-serving base station 2-2 with the interference amount of the base station 2-3 (step ST131). If multiple non-serving base stations are included, compare the minimum amount of interference at multiple non-serving base stations with the amount of interference at base stations 2-3.
  • the E—DCH active set control unit 92 maintains the current E—DCH active set when the interference amount of the non-serving base station 2-2 is larger than the interference amount of the base station 2-3. On the other hand, if the interference amount of the non-serving base station 2-2 is smaller than that of the base station 2-3, the non-serving base station 2-2 included in the current E-DCH active set is deleted. The base station 2-3 is then determined to be added to the E-DCH active set (step ST132).
  • the transmission power of the mobile terminal 1 is a base station with a small path loss force S Since it has a large influence on 2, do not look at the transmission rate, so the path loss is small, and base station 2 should be included in the DCH active set in order.
  • the base station controller 3 shows the force that determines whether an E-DCH active set is added based on the interference amount of the base stations 2-3.
  • addition of E-DCH active set may be determined based on pseudo SIR
  • the soft handover state if the SIR of any one of the base stations 2 can be guaranteed, the power is not increased any more, so the signal strength is always the same in each base station 2. Don't be. In other words, even if the interference is weak, the signal may be weak, and even if such a base station 2 is added to the E-DCH active set, there is a high possibility of causing a reception error.
  • the base station 2 to be added to the E-DCH active set is determined based on the pseudo SIR based on the interference amount of the base station 2 alone, the base station considering not only the interference amount but also the reception quality. 2 can be included in the E—DCH active set. This makes it possible to achieve both interference amount control and macro diversity effect.
  • the “interference amount” in FIG. 17 is replaced with the “pseudo SIR”.
  • the pseudo SIR is a value obtained by dividing the pseudo uplink received signal by the amount of interference
  • the larger the pseudo SIR the smaller the amount of interference, so the inequality sign of steps ST127 and ST131 is reversed.
  • FIG. 18 is a flowchart showing the processing contents for the base station control device 3 to determine whether or not to add the base station 2-3 to the E-DCH active set. [0139] It is most accurate to use the actually received result to determine how much interference the data transmitted from the mobile terminal 1 causes in the base station 2. In addition, when using E-DCH during soft handover, it interferes with the other base station 2, but it is accurate by setting a code and despreading it. You can know the power.
  • E-DCH code power cannot be used.
  • the E-DCH active set is added and added, and then the base station 2 measures the E-DCH code power and the E-DCH code power is low. In such a case, it is possible to delete it again. Since the number of E-DCH active sets that can be used simultaneously (the number of base stations included in the E-DCH active set) is limited, it should be added and deleted sequentially.
  • the E-DCH active set control unit 92 of the base station controller 3 tracks, for example, the base station 2-3 without replacing the E-DCH active set, and the base station 2-3 transmits and receives data.
  • One or more mobile terminals 1 to communicate with are designated as terminal A (step ST141).
  • E—DCH active set control section 92 selects one mobile terminal 1 whose terminal A is also in the middle (step ST142).
  • the E—DCH active set control unit 92 acquires the code power of the target mobile terminal 1 from the interference amount measurement unit 65 of the base station 2-3 (step ST143), and compares the code power with a predetermined threshold value (step ST143). ST144).
  • the E—DCH active set control unit 92 excludes the mobile terminal 1 from the E—DCH active set (step ST145).
  • step ST146 If the E—DCH active set control unit 92 is not yet selected in the terminal A and the mobile terminal 1 remains, the process of steps ST142 to ST145 is repeated (step ST146).
  • the base station controller 3 selects the E-DCH active set, the force for measuring the interference amount of the base station 2 E- DCH code power is not set after setting the actual E-DCH code. E-DCH activity that is already in reception If it is not Busset Base Station 2, code power cannot be obtained.
  • the E-DCH active set is selected only by the interference amount of the base station 2. If the AG does not change much in the non-RG mode, or if the transmission rate of the mobile terminal 1 is constant, the AG can be used as the transmission rate of the mobile terminal 1.
  • E-DCH communication There are two types of E-DCH communication: RG Based and non-RG Based.
  • the serving base station 2-1 schedules each mobile terminal 1 on a one-to-one basis, and the transmission rate is instructed from the serving base station 2-1 to the mobile terminal 1 for each scheduling. Is output, the rate changes at high speed. Therefore, notification via the base station controller 3 is difficult.
  • the base station controller 3 selects the base station 2 to add or replace the E-DCH active set, it is not necessary to signal the amount of interference to the mobile terminal 1! . Therefore, it is easy to ensure compatibility with the conventional system, and it is not affected by the signaling error of the interference amount due to the deterioration of the quality of the downlink transmission path.
  • the power shown for determining the base station 2 to be added to the E-DCH active set by the mobile terminal 1 the base that the mobile terminal 1 deletes from the E-DCH active set Explain what determines station 2.
  • the conventional standard for the active set of individual channels used the same standard for addition and deletion, but in the active set (E—DCH active set) in uplink packet communication, the deletion already received E—DCH. Therefore, it is possible to use E-DCH related criteria for judgment criteria, and to make it possible to determine E-DCH active set deletion more accurately.
  • mobile terminal 1 selects base station 2 to be deleted from the E-DCH active set based on the interference amount of base station 2 and the influence power on base station 2 due to the transmission data of mobile terminal 1. Will be described. For mobile terminal 1 with a small code power, base station 2 with sufficient interference is deleted from the E-DCH active set.
  • FIG. 19 is a flowchart showing the processing contents when the mobile terminal 1 determines whether or not to delete the non-serving base station 2-2 from the E-DCH active set.
  • the mobile terminal 1 performs a soft handover with the serving base station 2-1 and the non-serving base station 2-2 and the base station 2-3!
  • the mobile terminal 1 receives interference amount information indicating the interference amount of the non-serving base station 2-2 from the non-serving base station 2-2 (step ST151).
  • the mobile terminal 1 When receiving the interference amount information from the non-serving base station 2-2, the mobile terminal 1 deletes the interference amount of the non-serving base station 2-2 indicated by the interference amount information and the base station from the EDCH active set.
  • the threshold value D as a judgment criterion is compared (step ST152).
  • the threshold value D as a judgment criterion is obtained by signaling from the base station 2. Alternatively, it is calculated by the E-DCH active set control unit of mobile terminal 1 or base station 2.
  • the mobile terminal 1 When the amount of interference of the non-serving base station 2-2 exceeds the threshold D, the mobile terminal 1 affects the surrounding base station 2, and thus the non-serving base station 2— Keep the current E—DCH active set without removing 2 from the E—DC H active set. If the amount of interference of the non-serving base station 2-2 is less than the threshold D, the mobile terminal 1 determines that the non-serving base station 2-2 has a lower command and the amount of interference of the non-serving base station 2-2 is small. Therefore, the amount of interference (including signal) given to the non-serving base station 2-2 by the mobile terminal 1 is acquired (step ST153).
  • the mobile terminal 1 can obtain the transmission rate.
  • the mobile terminal 1 When the mobile terminal 1 obtains the code power as the amount of interference given to the non-serving base station 2-2, the mobile terminal 1 uses the code power and the threshold E as a judgment criterion when deleting the base station from the E-DCH active set. Compare (step ST154).
  • the threshold value E which is a judgment criterion, is obtained by signaling of base station power. Alternatively, it is calculated by the E-DCH active set control unit of mobile terminal 1 or base station 2.
  • the mobile terminal 1 When the code power is greater than or equal to the threshold E, the mobile terminal 1 greatly affects the surrounding base station 2. Therefore, the current E-DCH active set is maintained without removing the non-serving base station 2-2 from the E-DCH active set.
  • the non-serving base station 2-2 is removed from the E-DCH active set to reduce the signaling load. Like that.
  • the mobile terminal 1 if the code power is less than the threshold value E, the mobile terminal 1 generates a deletion event requesting to delete the non-serving base station 2-2 from the E-DCH active set (step ST155).
  • the mobile terminal 1 When the mobile terminal 1 generates a deletion event as described above, the mobile terminal 1 places the deletion event on the DCH and transmits it to the base station control apparatus 3 via the non-serving base station 2-2.
  • the base station controller 3 receives a delete event requesting that the non-serving base station 2-2 is deleted from the E-DCH active set from the mobile terminal 1, the base station controller 3 sets the non-serving base station 2-2 to E-DCH active. Remove from set.
  • the non-serving base station 2-2 can reduce the force signaling load that makes it impossible to execute the process of transmitting the Down command to the mobile terminal 1.
  • the power shown for comparing the code power with the threshold E is the transmission rate (transmission power) of the mobile terminal 1 and the regulation criteria F (E—DCH allowable power and non-serving base station 2-2
  • the transmission rate is less than the regulation standard F
  • the mobile terminal 1 requests that the non-serving base station 2-2 be deleted from the E-DCH active set. Let's fire a delete event.
  • FIG. 20 is a flowchart showing the processing contents for determining whether or not the mobile terminal can delete the base station from the E-DCH active set.
  • FIG. 21 is a sequence diagram showing the sequence of the mobile communication system.
  • the interference amount measuring unit 65 of the non-serving base station 2-2 measures all the interference amounts in the non-serving base station 2-2 and calculates the sum of all interference amounts (step ST11).
  • all interference amounts are measured by removing signal components based on the reception intensity output from the low noise amplification unit 54 and the pilot in the reception signal output from the demodulation unit 55.
  • the interference amount notification unit 68 of the non-serving base station 2-2 notifies the base station control device 3 of interference amount information indicating the interference amount ( Step ST12).
  • the transmission control unit 82 of the base station controller 3 When the transmission control unit 82 of the base station controller 3 receives the interference amount information from the non-serving base station 2-2, the transmission control unit 82 transmits the interference amount information via the P-CCPCH transmission unit 72 of the non-serving base station 2-2.
  • the mobile terminal 1 is notified (step ST13).
  • the conventional R99 notification method can be used, and therefore it is not necessary to add a new device to the mobile terminal 1.
  • the non-serving base station 2-2 notifies the mobile terminal 1 of the interference amount information directly.
  • the non-serving base station 2-2 notifies the interference amount information directly to the mobile terminal 1, there is an advantage that the interference amount information can be notified promptly through the base station controller 3.
  • the non-serving base station 2-2 notifies the mobile terminal 1 of the interference amount information !!, but the interference amount measuring unit of the non-serving base station 2-2 65 may calculate the interference margin by subtracting the sum of the maximum allowable power and the total amount of interference, and notify the mobile terminal 1 of the interference margin.
  • the P-CCPCH receiving unit 32 of the mobile terminal 1 receives the interference amount information from all the base stations 2 included in the E-DCH active set (step ST161). In the example of Fig. 1, the interference amount information of the non-serving base station 2-2 is received.
  • the E—DCH active set control unit 38 of the mobile terminal 1 Corresponding to the threshold value D, which is the judgment criterion (step ST162).
  • a regulation standard D different from the regulation standard A for the amount of interference shown in the first embodiment is calculated.
  • Regulatory standard A and regulatory standard D are the same.
  • the E—DCH active set control unit 38 of the mobile terminal 1 calculates the interference standard D, it is not indispensable for macro diversity among the base stations 2 included in the E—DCH active set.
  • One or more base stations are selected (step ST163). Although this base station selection method will be described later, here, for convenience of explanation, the non-serving base station 22 is selected.
  • E—DCH active set control unit 38 arbitrarily selects one base station 2 from one or more base stations 2 that are not indispensable (step ST164).
  • the non-serving base station 2-2 is selected.
  • the interference amount of the non-serving base station 2-2 is compared with the regulation standard D (step ST165).
  • the E—DCH active set control unit 38 determines that the non-serving base station 2-2 should be deleted if the interference amount of the non-serving base station 2-2 is equal to or greater than the regulation standard D, and is indispensable. It is determined whether or not there is an unselected base station 2 among one or more base stations 2 (step ST166).
  • E—DCH active set control unit 38 deletes the non-serving base station 2-2 from the E—DCH active set power if the interference amount of the non-serving base station 2-2 does not satisfy the regulation standard D.
  • a delete event is generated requesting (step ST167).
  • the DPCH transmission unit 18 of the mobile terminal 1 transmits the deletion event generated from the E—DCH active set control unit 38 to the base station control device 3 (step ST168).
  • E-DCH active set deletion may be determined based on the amount of interference and pseudo SIR.
  • the non-serving base station 2-2 to be deleted from the E-DCH active set is determined based on the pseudo SIR that is based not only on the interference level of the base station, but not only the interference level but also the reception quality is considered.
  • Serving base stations 2-2 can be excluded from the E-DCH active set. As a result, it is possible to achieve both control of the amount of interference and the macro diversity effect.
  • the "interference amount" in Fig. 20 is replaced with the "pseudo SIR".
  • the pseudo SIR is a value obtained by dividing the pseudo uplink received signal by the amount of interference, the larger the pseudo SIR, the smaller the amount of interference, so the inequality sign in step ST165 is reversed.
  • the radio resource management unit 83 of the base station control device 3 E—DCH active set deletion event is received (step ST172).
  • the transmission control unit 82 of the base station controller 3 issues an E-DCH active set deletion request under the instruction of the radio resource management unit 83. Transmit to non-serving base station 2-2 (step ST173).
  • the protocol processing unit 57 of the non-serving base station 2-2 executes the E-DCH active set deletion process (step ST174). ).
  • E-DCH active set deletion process is the same as the deletion process associated with the replacement instruction described in the first embodiment, and a description thereof will be omitted.
  • the protocol processing unit 57 of the non-serving base station 2-2 When the protocol processing unit 57 of the non-serving base station 2-2 performs the deletion process of the E-DCH active set, the protocol processing unit 57 notifies the base station controller 3 of the completion of the deletion process (step ST 175).
  • the transmission control unit 82 of the base station controller 3 receives a notification of completion of the deletion process from the non-serving base station 2-2, the transmission control unit 82 deletes the E-DCH active set via the non-serving base station 2-2.
  • the instruction is transmitted to mobile terminal 1 (step ST176).
  • the protocol processing unit 41 of the mobile terminal 1 performs an E DCH active set deletion process (step ST177). .
  • E-DCH active set deletion process is the same as the deletion process associated with the replacement instruction described in the first embodiment, and a description thereof will be omitted.
  • the protocol processing unit 41 of the mobile terminal 1 When performing the E-DCH active set deletion process, the protocol processing unit 41 of the mobile terminal 1 notifies the base station controller 3 of the completion of the deletion process (step ST178).
  • the mobile terminal 1 collects the interference amount of the non-serving base station 2-2 included in the E—DCH active set, and the interference amount Is smaller than the regulation standard D, a request to delete the non-serving base station 2-2 from the E-DCH active set is transmitted to the base station controller 3, and the base station controller 3 transmits from the mobile terminal 1.
  • the non-serving base station 2-2 included in the E—DCH active set is deleted in response to the requested request, so that the signaling load on the non-serving base station 2-2 can be reduced. There is an effect.
  • the determining entity may be base station 2.
  • the deletion determination subject is the base station 2
  • the base station 2 since the base station 2 is already in a state where it can receive the E-DCH, the received code power of the E-DCH transmitted from the mobile terminal 1 is Base station 2 can get. Therefore, the amount of interference given by the mobile terminal can be obtained to the extent that it accounts for the interference of the entire base station.
  • the mobile terminal 1 having a large influence on interference can be known in the base station 2, the mobile terminal 1 can be preferentially removed from the E-DCH active set.
  • Base station 2 determines deletion based on the amount of interference of the local station and the code power of mobile terminal 1. When base station 2 determines the deletion, it is necessary to accurately determine how much the transmission power of mobile terminal 1 that does not need to signal the amount of interference to mobile terminal 1 actually affects the base station end. There are benefits that you can know.
  • FIG. 22 is a sequence diagram showing the sequence of the mobile communication system when the base station controller 3 instructs the deletion of the E-DCH active set
  • FIG. 23 shows the base station 2 as the E-DCH It is a flow chart showing the processing contents for determining whether or not to delete from the active set.
  • the interference amount measurement unit 65 of the non-serving base station 2-2 included in the EDCH active set measures the interference amount (step ST181).
  • the interference amount measuring unit 65 of the non-serving base station 2-2 measures the E-DCH code power (or transmission rate) (step ST182).
  • the signaling measurement unit 79 of the non-serving base station 2-2 measures the signaling load (step ST183).
  • the E-DCH active set control unit 71 of the non-serving base station 2-2 is able to determine its own station from the E-DCH active set. It is determined whether or not the power to delete is determined (step ST184). Details of the deletion determination process will be described later.
  • the protocol processing unit 57 of the non-serving base station 2-2 ends the process when the determination result of the E-DCH active set control unit 71 indicates that the own station is not deleted from the E-DCH active set.
  • a request to delete the own station from the E-DCH active set is transmitted to the base station controller 3 (step ST185).
  • the transmission control unit 82 of the base station control device 3 receives the deletion request from the non-serving base station 2-2, under the instruction of the radio resource management unit 83, the transmission control unit 82 issues a non-serving instruction to delete the E-DCH active set. Transmit to base station 2-2 (step ST186).
  • the protocol processing unit 57 of the non-serving base station 2-2 receives the E-DCH active set deletion instruction from the base station controller 3, it performs the E-DCH active set deletion processing (step ST 187).
  • the E-DCH active set deletion process is the same as the deletion process associated with the replacement instruction described in the first embodiment, and a description thereof will be omitted.
  • the protocol processing unit 57 of the non-serving base station 2-2 When the protocol processing unit 57 of the non-serving base station 2-2 performs the deletion processing of the E-DCH active set, it notifies the base station control device 3 of the completion of the deletion processing (step ST 188).
  • the transmission control unit 82 of the base station controller 3 receives a notification of completion of the deletion process from the non-serving base station 2-2, the transmission control unit 82 deletes the E-DCH active set via the non-serving base station 2-2.
  • the instruction is transmitted to mobile terminal 1 (step ST189).
  • the protocol processing unit 41 of the mobile terminal 1 performs the E DCH active set deletion process (step ST190). .
  • E-DCH active set deletion process is the same as the deletion process associated with the replacement instruction described in the first embodiment, and a description thereof will be omitted.
  • the protocol processing unit 41 of the mobile terminal 1 When performing the E-DCH active set deletion process, the protocol processing unit 41 of the mobile terminal 1 notifies the base station control apparatus 3 of the completion of the deletion process (step ST191).
  • the non-serving base station 2-2 signaling measurement unit 79 included in the E-DCH active set measures the signaling load of AG, RG and ACKZNACK, and the signaling load exceeds the allowable amount. Then, it is determined whether or not the force is sufficient (step ST201). The non-serving base station 2-2 maintains its current active set if the signaling load does not exceed the allowed amount.
  • the interference amount measuring unit 65 of the non-serving base station 2-2 measures the code power of the E-DCH currently received by the own station (Step ST202).
  • terminal D is one or more mobile terminals 1 that are transmitting E-DCH.
  • the E-DCH active set control unit 71 of the non-serving base station 2-2 calculates the E-DCH code power regulation standard G (step ST203). Or by signaling Be notified.
  • the E-DCH active set control unit 71 of the non-serving base station 2-2 calculates the E-DCH code power regulation standard G, it arbitrarily selects one mobile terminal 1 from the terminal D, The E-DCH code power of the mobile terminal 1 is acquired from the interference amount measuring unit 65 (step ST204).
  • the E—DCH active set control unit 71 acquires the interference amount of the mobile terminal 1 from the interference amount measurement unit 65, for example, the transmission allowable power (maximum power) power interference amount in the non-serving base station 2-2. Etc. is subtracted to obtain the interference margin, and the ratio of the interference margin to the E-DC H code power is calculated (step ST205).
  • the E-DCH active set control unit 71 compares the ratio with the regulation standard G (step ST206).
  • the E—DCH active set control unit 71 maintains the current E—DCH active set, and whether or not the unselected mobile terminal 1 exists in the terminal D. Is determined (step ST207).
  • E—DCH active set control unit 71 transmits a request to delete the own station from the E—DCH active set to base station control apparatus 3 (step ST208).
  • the non-serving base station 2-2 when the amount of interference is smaller than the predetermined threshold, the non-serving base station 2-2 is requested to delete its own station from the E-DCH active set. To the base station controller 3, and the base station controller 3 deletes the non-serving base station 2-2 in response to the request transmitted from the non-serving base station 2-2. Since it is configured, the signaling load of the non-serving base station 2-2 can be reduced.
  • the power macro diversity effect is high for the case of selecting a base station to be a non-serving base station based on the amount of interference in base station 2.
  • Embodiment 5 focuses on macro diversity, which is another role of a non-serving base station.
  • data transmitted from the mobile terminal 1 is received by a plurality of base stations 2 and the base station controller 3 selects received data whose decoding result is “CRC OK”.
  • the serving base station 2-1 becomes NACK
  • data can be received if the non-serving base station 2-2 becomes ACK. Therefore, when selecting a non-serving base station, it is desirable to select a non-serving base station that becomes ACK when the serving base station becomes NACK.
  • Spatial correlation takes a long time to be reflected in a path loss averaged over a long period of time, so judgment is made using the one that reflects faster transmission path fluctuations.
  • the use of the instantaneous CPICH reception level and the response signal (ACKZNACK) transmitted from the base station can be considered as a way of knowing the spatial correlation between base stations that reflects fast channel fluctuations.
  • FIG. 24 is a flowchart showing the processing contents for changing the E-DCH active set in consideration of the effect of macro diversity.
  • FIG. 24 is common to the case where the determination entity is the mobile terminal 1 and the case where the determination entity is the base station controller 3.
  • the device (mobile terminal 1 or base station control device 3) that is the main subject of determination calculates the correlation of the transmission path between the mobile terminal 1 and each base station 2 (step ST211).
  • correlation calculation means Correlation calculating section 36 (or response signal counting section 37) of mobile terminal 1 calculates the correlation of the transmission path between mobile terminal 1 and each base station 2.
  • the device (mobile terminal 1 or base station control device 3) that is the subject of the decision is the serving base station.
  • the E-DCH active set control unit 38 or the like of the apparatus that is the main subject of the determination determines whether or not the reception quality of the serving base station 2-1 is higher than a predetermined threshold (step ST213).
  • the E—DCH active set control unit 38, etc., of the device that is the main body of judgment does not need to use macro diversity. Determine the need to delete existing non-serving base stations that do not need to be added.
  • the reception quality of the serving base station 2-1 is lower than the predetermined threshold, it is necessary to use macro diversity. Therefore, the existing non-serving base station is not deleted, and an additional non-serving base station is added. Determine the need.
  • step ST212 and ST213 are not performed, and the process proceeds from step ST211 to ST214.
  • the E-DCH active set control unit 38 or the like of the device that is the main body of the judgment has a correlation of the transmission path below the predetermined threshold (or It is determined whether or not the force is an inverse correlation (step ST214).
  • the threshold here is notified by calculation or signaling.
  • the E-DCH active set control unit 38, etc., of the device that is the main body of judgment cannot expect the effect of macro diversity that the correlation of the transmission path is high when the correlation of the transmission path exceeds a predetermined threshold. Without adding a non-serving base station, keep the current E—DCH active set and exit.
  • the protocol processing unit 41 of the mobile terminal 1 performs macro diversity with a low correlation of the transmission path. Since an effect can be expected, an additional event of E—DCH active set is generated (step ST215).
  • the E-DCH active set control unit 38 etc. of the device that is the main body of the judgment If the reception quality of station 2-1 is higher than a predetermined threshold value, it is determined whether or not the correlation of the transmission path is equal to or higher than the predetermined threshold value (step ST216).
  • the threshold here is notified by calculation or signaling.
  • the E-DCH active set control unit 38, etc., of the device that is the main body of the judgment can expect the effect of macro diversity in which the correlation of the transmission path is low when the correlation of the transmission path is below a predetermined threshold.
  • the non-serving base station is not deleted, and the current E—DCH active set is maintained and the process ends.
  • the protocol processing section 41 of the mobile terminal 1 has a high transmission path correlation and macro diversity. Therefore, the E—DCH active set deletion event is generated (step ST217).
  • the reception quality of the serving base station 2-1 and the correlation power between the serving base station 2-1 and the base station 2 to be added to the DCH active set are selected.
  • the reception quality is poor, and the base station 2 having a low correlation among the base stations 2 included in the conventional active set becomes the non-serving base station for the serving base station 2-1
  • the base station 2 can also make a judgment by notifying the base station 2 of the CPICH reception level from the mobile terminal 1. However, when the base station 2 determines the correlation, it is not suitable because a delay occurs if the transmission path fluctuates at high speed.
  • the base station When the base station determines the correlation, it reports the average value of the CPICH level measured at the terminal and does not follow high-speed fluctuations.
  • an instantaneous change can be used.
  • CPI As the instantaneous level of the CH signal, use of CPICH E ZN or the like can be considered. (E / N
  • Fig. 25 is a sequence diagram showing the sequence of the mobile communication system when adding an E-DCH active set, and Fig. 26 shows whether mobile terminal 1 has the power to increase the effect of macro diversity. It is a flowchart which shows the processing content to determine.
  • CPICH receiver 28 of mobile terminal 1 measures the reception level of CPIC H transmitted from serving base station 2-1 (step ST221).
  • the CPICH receiving unit 28 of the mobile terminal 1 measures the reception level of the CPICH transmitted from the non-serving addition candidate base stations 2-3 (step ST222).
  • the E—DCH active set controller 38 of the mobile terminal 1 determines whether the base stations 2-3 that are non-serving additional candidates are It is determined whether to enhance the diversity effect (step ST223). A process for determining whether or not the power increases the macro diversity effect will be described later.
  • the DPCH transmitter 18 of the mobile terminal 1 When the DPCH transmitter 18 of the mobile terminal 1 indicates that the E-DCH active set controller 38 does not increase the effectiveness of the macro diversity effect, it maintains the current E-DCH active set and terminates. If the determination result of the E—DCH active set control unit 38 indicates that the effect of macro diversity is enhanced, an additional event requesting that the non-serving addition candidate base stations 2-3 be added to the E—DCH active set is sent. Transmit to the base station controller 3 (step ST224).
  • the protocol processing unit 57 of the non-serving addition candidate base stations 2 to 3 transmits the signaling load measured by the signaling measurement unit 79 to the base station controller 3 (step ST 225) o
  • the E—DCH active set control unit 92 of the base station control device 3 determines whether or not the signaling load is within an allowable range (step ST226).
  • the E—DCH active set control unit 92 of the base station controller 3 is the signal of the base station 2—3. If the ring load is outside the allowable range, base stations 2-3 cannot be added to the E-DCH active set, so the current E-DCH active set is maintained and the process ends.
  • the transmission control unit 82 of the base station controller 3 determines that the E-DCH active set control unit 92 indicates that the signaling load of the base station 2-3 is within an allowable range.
  • An instruction to add a CH active set is transmitted to base stations 2-3 (step ST227).
  • the protocol processing unit 57 of the base station 2-3 Upon receiving an instruction to add an E-DCH active set from the base station controller 3, the protocol processing unit 57 of the base station 2-3, as in the first embodiment, sets the E-DCH active set. Additional processing is performed (step ST228).
  • the protocol processing unit 57 of the base station 2-3 When the protocol processing unit 57 of the base station 2-3 performs the E-DCH active set addition process, it notifies the base station controller 3 of the completion of the addition process (step ST229).
  • the transmission control unit 82 of the base station controller 3 When the transmission control unit 82 of the base station controller 3 receives a notification of completion of the additional process from the base stations 2-3, the transmission control unit 82 moves an instruction to add the E-DCH active set via the base stations 2-3. Transmit to terminal 1 (step ST230).
  • the protocol processing unit 41 of the mobile terminal 1 is the same as in the first embodiment.
  • E—Addition process of DCH active set is performed (step ST231), and the completion of the addition process is notified to the base station controller 3 (step ST232).
  • processing contents for determining whether or not the mobile terminal 1 enhances the effect of macro diversity processing contents of step ST223 in FIG. 25.
  • the CPICH receiving unit 28 of the mobile terminal 1 measures the reception level of the CPICH in which the base station power of the conventional active set is also transmitted (step ST241).
  • the CPICH receiving unit 28 of the mobile terminal 1 transmits the C transmitted from the serving base station 2-1.
  • the E—DCH active set controller 38 of the mobile terminal 1 sets the CPICH reception level as the downlink signaling error criterion. (Step ST242).
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the CPICH reception level at the serving base station 2-1 with a predetermined threshold (step ST243).
  • the E—DCH active set control unit 38 determines that the E—DCH can be received only by the serving base station 2-1 when the CPICH reception level is higher than a predetermined threshold, and sets the non-serving base station as the non-serving base station. Exit without adding.
  • step ST244 the number of NACKs for a certain time is counted.
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the number of NACKs with a predetermined threshold (step ST245). .
  • the threshold here is obtained by calculation in the signaling or E-DCH active set control unit 38.
  • the E—DCH active set control unit 38 determines that only the serving base station 2-1 can receive the E—DCH when the number of NACKs is smaller than a predetermined threshold, and adds a non-serving base station. Exit without
  • Steps ST244 and ST245 are applied only when the serving base station 2-1 has already been set.
  • the correlation calculation unit 36 of the mobile terminal 1 calculates the correlation from the covariance between the CPICH reception level in the serving base station 2-1 and the CPICH reception level in the non-serving candidate base station 2-3. (Step ST246).
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the correlation with a predetermined threshold (step ST247).
  • the threshold here is obtained by calculation in the signaling or E-DCH active set control unit 38.
  • the E-DCH active set control unit 38 of the mobile terminal 1 may add the non-serving candidate base stations 2-3 to the E-DCH active set if the correlation is equal to or greater than a predetermined threshold. If the correlation is found to be less effective (step ST248), but the correlation is smaller than a predetermined threshold, the non-serving candidate base stations 2-3 are set to the E-DCH active set. If added, it is recognized that the effect of macro diversity is enhanced (step ST249).
  • the base station 2-3 when the correlation between the serving base station 2-1 and the base station 2-3 is low, the base station 2-3 is made a non-serving base station. Since it is configured to be changed, there is an effect that the effect of macro diversity can be enhanced.
  • the power serving base station shown for changing the base station 2-3 to a non-serving base station is shown. If the correlation between 2-1 and non-serving base station 2-2 is high, you may want to remove that non-serving base station 2-2 from the E-DCH active set!
  • a non-serving base station to be deleted from the E-DCH active set is selected based on the reception quality of the serving base station 2-1 and the correlation with the serving base station 2-1. That is, for the serving base station 2-1 with good reception quality, the non-serving base station with high correlation is deleted from the E-DCH active set.
  • the CPICH reception level can be used, but the number of ACKZNACKs transmitted from base station 2 can be used.
  • ACKZNACK is a response signal based on the reception result of the base station 2 with respect to the data transmitted from the mobile terminal 1, and the quality of the upstream transmission path that reflects only the downstream transmission path is reflected in the result. Therefore, it is possible to confirm the correlation between base stations in E-DCH.
  • the reception level power of CPICH is also a power to perform correlation determination.
  • E When deleting a DCH active set, it is based on the more ideal ACKZNACK. First, perform correlation determination.
  • Fig. 27 is a sequence diagram showing the sequence of the mobile communication system when deleting the E-DCH active set
  • Fig. 28 is a process for determining whether or not the mobile terminal 1 is enhancing the effect of macro diversity. It is a flowchart which shows the content.
  • the E-DCH transmission unit 24 of the mobile terminal 1 transmits the E-DCH to each base station 2 included in the E-DCH active set (step ST251).
  • the E-DPDCH receiving unit 62 of the serving base station 2-1 included in the E-DCH active set receives the E-DCH transmitted from the mobile terminal 1 (step ST252). Also, the E-D PDCH receiver 62 of the non-serving base station 2-2 included in the E-DCH active set also receives the E-DCH transmitted from the mobile terminal 1 (step ST2 53). .
  • the E-HICH transmission unit 78 of the serving base station 2-1 receives the E-DCH from the mobile terminal 1 when the E-DPDCH reception unit 62 receives the E-DCH as a response signal based on the reception result of the E-DCH.
  • ACKZNACK is transmitted to mobile terminal 1 (step ST254).
  • the E-HICH transmission unit 78 of the non-serving base station 2-2 also receives an ACKZNACK as a response signal based on the E-DCH reception result when the E-DPDCH reception unit 62 receives the E-DCH from the mobile terminal 1. Is transmitted to mobile terminal 1 (step ST256).
  • the E—HICH receiver 26 of the mobile terminal 1 receives the ACKZNACK transmitted from the serving base station 2-1 and the non-serving base station 2-2 (steps ST255 and ST257).
  • the E—DCH of the mobile terminal 1 The active set control unit 38 determines whether or not the non-serving base station 2-2 is enhancing the macro diversity effect based on the ACKZNACK measured by the E—HICH receiving unit 26! (Step ST258). The process of determining whether or not to increase the macro diversity effect will be described later.
  • the DPCH transmitter 18 of the mobile terminal 1 maintains the current E-DCH active set when indicating that the E-DCH active set controller 38 is determining the effectiveness of macro diversity. If the determination result of the E—DCH active set control unit 38 indicates that the effect of macro diversity is not enhanced, a request is made to delete the non-serving base station 2-2 from the E—DCH active set. Base station control of delete events Transmit to device 3 (step ST259).
  • the protocol processing unit 57 of the non-serving base station 2-2 transmits the signaling load measured by the signaling measuring unit 79 to the base station control device 3 (step ST260).
  • the E-DCH active set control unit 92 of the base station controller 3 compares the signaling load with a predetermined threshold (step ST262).
  • the E—DCH active set control unit 92 of the base station controller 3 has a margin in signaling load if the signaling load of the base stations 2-3 is smaller than a predetermined threshold, and sets the non-serving base stations 2-2 to E -No need to remove from DCH Active Set !, so keep current E — DCH Active Set and exit.
  • the interference amount notification unit 68 of the non-serving base station 2-2 transmits the interference amount measured by the interference amount measurement unit 65 to the base station controller 3 (step ST262).
  • the notification of the interference amount can also be made to the mobile terminal 1 connected by the base station control device 3.
  • the E—DCH active set control unit 92 of the base station control device 3 is the non-serving base station 2
  • the amount of interference is compared with a predetermined threshold (step ST263).
  • the threshold here is the same as the regulation standard D in the third embodiment.
  • the E—DCH active set control unit 92 of the base station controller 3 needs to perform power control as a non-serving base station with a sufficient margin when the interference amount of the non-serving base station 22 is greater than a predetermined threshold. Therefore, the current E—DCH active set is maintained and the process ends.
  • the transmission control unit 82 of the base station control device 3 has a sufficient amount of interference and needs to perform power control as a non-serving base station Therefore, the E—DCH active set deletion instruction is transmitted to the non-serving base station 2 — 2 (step ST 264).
  • the protocol processing unit 57 of the non-serving base station 2-2 When the protocol processing unit 57 of the non-serving base station 2-2 receives the E-D CH active set deletion instruction from the base station controller 3, it deletes the E-DC H active set as in the third embodiment. Processing is performed (step ST265). When the protocol processing unit 57 of the non-serving base station 2-2 performs the E—DCH active set deletion process, it notifies the base station controller 3 of the completion of the deletion process (step ST 266) o.
  • the transmission control unit 82 of the base station controller 3 receives a notification of completion of the deletion process from the non-serving base station 2-2, the transmission control unit 82 deletes the E-DCH active set via the non-serving base station 2-2.
  • the instruction is transmitted to mobile terminal 1 (step ST267).
  • the protocol processing unit 41 of the mobile terminal 1 receives the E-DCH active set in the same manner as in the third embodiment.
  • a deletion process is performed (step ST268).
  • the protocol processing unit 41 of the mobile terminal 1 When performing the E-DCH active set deletion process, the protocol processing unit 41 of the mobile terminal 1 notifies the base station control device 3 of the completion of the deletion process (step ST269).
  • the response signal counting unit 37 of the mobile terminal 1 counts AC KZNACK transmitted from the serving base station 2-1 and counts ACKZ NACK transmitted from the non-serving base station 2-2 (step ST271).
  • CPICH receiver 28 of mobile terminal 1 measures the reception level of CPIC H transmitted from serving base station 2-1 (step ST272). This CPICH reception level means the quality of the downlink transmission path and is used to check the degree of downlink signaling errors.
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the CPICH reception level at the serving base station 2-1 with a predetermined threshold (step ST273).
  • the E—DCH active set control unit 38 when the CPICH reception level is lower than the predetermined threshold value, may not be reliable for the response signal of the serving base station 2-1; Exit without deleting. In other words, even if the serving base station 2-1 transmits ACK but the mobile terminal 1 regards it as NACK due to a bad transmission path, the non-serving base station 2-2 It is desirable to receive correctly by ACK. Therefore, the non-serving base station 2-2 is not deleted.
  • the response signal count unit 37 of the mobile terminal 1 is the ratio of the E-DCH active set control unit 38. If the comparison result indicates that the CPICH reception level is higher than the predetermined threshold, the ACKZNACK that is the response signal of the serving base station 2-1 is obtained from the E-HICH reception unit 26, and the NACK number Z total reception number is obtained. Calculate (step ST274).
  • the total number of receptions indicates the degree of error in uplink quality under conditions where downlink quality is good.
  • the E—DCH active set control unit 38 of the mobile terminal 1 compares the NACK number Z total received number with a predetermined threshold (step ST275).
  • the threshold here is obtained by calculation in the signaling or E-DCH active set control unit 38.
  • the E—DCH active set control unit 38 ends without deleting the E—DCH active set because the quality of the serving base station 2-1 is low. In this case, it is desirable to replace the serving base station 2-1 with a base station with good uplink quality. Since this process takes time, the non-serving base station 2-2 is not deleted.
  • the response signal counting unit 37 of the mobile terminal 1 determines that when the NACK is transmitted from the serving base station 2-1, the non-serving base station 2 — Count the number of ACKs transmitted from 2 (step ST276).
  • the E-DCH active set control unit 38 of the mobile terminal 1 compares the number of ACKs with a predetermined threshold (step ST277).
  • the threshold here is obtained by calculation in the signaling or E-DCH active set control unit 38.
  • the E—DCH active set control unit 38 of the mobile terminal 1 recognizes that the non-serving base station 2-2 is increasing the effect of macro diversity (step ST278). ) If the number of ACKs does not satisfy the predetermined threshold, non-serving base station 2-2 determines that the macro diversity effect is enhanced (step ST279).
  • the non-serving base station 2-2 is E—DCH Since it is configured to be deleted from the active set, the macro diversity effect is enhanced.
  • the deletion determining entity is the mobile terminal 1, but the deletion determining entity is the base station control. Even device 3.
  • Fig. 29 is a sequence diagram showing the sequence of the mobile communication system when the E-DCH active set is deleted.
  • Fig. 30 shows whether the base station controller 3 is increasing the macro diversity effect. It is a flowchart which shows the processing content to perform.
  • the E-DCH transmission unit 24 of the mobile terminal 1 transmits the E-DCH to each base station 2 included in the E-DCH active set (step ST281).
  • the E-DPDCH reception unit 62 of the serving base station 2-1 included in the E-DCH active set receives the E-DCH transmitted from the mobile terminal 1 (step ST282).
  • the radio resource management unit 83 of the base station control unit 3 receives the E-DCH transmitted from the serving base station 2-1 (step ST283).
  • the E-DPDC H receiving unit 62 of the non-serving base station 2-2 included in the E-DCH active set receives the E-DCH transmitted from the mobile terminal 1 (step ST284).
  • the radio resource management unit 83 of the base station control unit 3 receives the E-DCH transmitted from the non-serving base station 2-2 (step ST285).
  • the E—DCH transmitter 24 of the mobile terminal 1 notifies the base station controller 3 of the CPICH reception level measured by the CPICH receiver 28 in the serving base station 2-1 and the non-serving base station 2-2 ( Step ST286).
  • Protocol processing section 57 of non-serving base station 2-2 transmits the signaling load measured by signaling measuring section 79 to base station control apparatus 3 (step ST287).
  • the E—DCH active set control unit 92 of the base station controller 3 receives the signaling load from the non-serving base station 2 — 2, the non-serving base station 2-2 performs macro diversity based on the signaling load and the like. Judgment whether or not the power is increasing the effect (step ST288). The process of determining whether or not to increase the effect of macro diversity will be described later.
  • E—DCH active set control unit 92 determines that the macro diversity effect is enhanced, the current E—DCH active set is maintained and the process ends.
  • the interference amount notification unit 68 of the non-serving base station 2-2 transmits the interference amount measured by the interference amount measurement unit 65 to the base station control device 3 (step ST289).
  • the E—DCH active set control unit 92 of the base station controller 3 compares the interference amount with a predetermined threshold (step ST 290). Is the same as the regulation standard D in the third embodiment.
  • the E—DCH active set control unit 92 of the base station controller 3 needs to perform power control as a non-serving base station with a sufficient margin when the interference amount of the non-serving base station 22 is greater than a predetermined threshold. Therefore, the current E—DCH active set is maintained and the process ends.
  • the transmission control unit 82 of the base station control device 3 has a margin in the interference amount and needs to perform power control as a non-serving base station. Therefore, an E—DCH active set deletion instruction is transmitted to the non-serving base station 2—2 (step ST291).
  • the protocol processing unit 57 of the non-serving base station 2-2 When the protocol processing unit 57 of the non-serving base station 2-2 receives the E-D CH active set deletion instruction from the base station controller 3, it deletes the E-DC H active set as in the third embodiment. Processing is performed (step ST292).
  • the protocol processing unit 57 of the non-serving base station 2-2 When the protocol processing unit 57 of the non-serving base station 2-2 performs the deletion processing of the E—DCH active set, it notifies the base station controller 3 of the completion of the deletion processing (step ST 293) o
  • the transmission control unit 82 of the base station controller 3 receives the notification of the completion of the deletion process from the non-serving base station 2-2, the transmission control unit 82 deletes the E-DCH active set via the non-serving base station 2-2. An instruction is transmitted to mobile terminal 1 (step ST294).
  • the protocol processing unit 41 of the mobile terminal 1 is the same as in Embodiment 3 above. , E— Deletes the DCH active set (step ST295).
  • the protocol processing unit 41 of the mobile terminal 1 notifies the base station controller 3 of the completion of the deletion process (step ST296).
  • the response signal counting unit 91 of the base station control device 3 is not matched when the CRC result of the data transmitted from the serving base station 2-1 is “NG” (or when the data is not received). It counts the number of times that the CRC result of the data transmitted from Bing base station 2-2 is “OK” (step ST301).
  • the E-DCH active set control unit 92 of the base station control device 3 compares the predetermined number of times counted by the response signal counting unit 91 with a predetermined threshold (step ST302).
  • step ST302 instead of the count number for a certain time,
  • the signaling load storage unit 90 of the base station control device 3 determines that the E-DCH active set control unit 92 has not increased the effect of macro diversity, and the non-serving base station
  • the E—DCH active set control unit 92 of the base station controller 3 compares the signaling load with a predetermined threshold (step ST306). ).
  • E—DCH active set control unit 92 uses other non-serving base stations 2-2 as non-serving base stations when other signaling terminals 1 have a signaling load smaller than a predetermined threshold. It is also possible to maintain the current E—DCH active set and there will be no problem!
  • E-DCH active set control section 92 determines to delete non-serving base station 2-2 from the E-DCH active set (step ST307).
  • non-serving base station 2-2 can use the non-serving base station 2-2 as a non-serving base station.
  • the non-serving base station 2-2 when the correlation between the serving base station 2-1 and the non-serving base station 2-2 is high, the non-serving base station 2-2 is E— Since it is configured to be deleted from the DCH active set, the effect of macro diversity can be enhanced and only the non-serving base station 2-2, V, can be used.
  • the mobile communication system enables the base station whose interference amount exceeds the allowable amount to control the transmission power of data transmitted from the mobile terminal, thereby improving the transmission quality. This is suitable for products that have a high need to suppress deterioration of the product.

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Abstract

Contrôleur de stations de base (3) triant une pluralité de stations de base (2) sur une station de base d’un ensemble actif E-DCH ou une station de base d’un ensemble actif de transfert intercellulaire sans coupure (ensemble actif conventionnel), correspondant à un état de réception de données des stations de base (2).
PCT/JP2005/005762 2005-03-28 2005-03-28 Systeme de communication mobile et terminal mobile WO2006103737A1 (fr)

Priority Applications (23)

Application Number Priority Date Filing Date Title
PCT/JP2005/005762 WO2006103737A1 (fr) 2005-03-28 2005-03-28 Systeme de communication mobile et terminal mobile
PCT/JP2006/301353 WO2006103823A1 (fr) 2005-03-28 2006-01-27 Systeme de communication d’objet mobile, procede de commande de transfert intercellulaire, appareil de commande de stations de base et terminal mobile
KR1020077010102A KR20070053823A (ko) 2005-03-28 2006-01-27 이동체 통신 시스템, 핸드 오버 제어 방법, 기지국제어장치 및 이동 단말
KR1020097004696A KR101103213B1 (ko) 2005-03-28 2006-01-27 통신 장치
JP2007510326A JPWO2006103823A1 (ja) 2005-03-28 2006-01-27 移動体通信システム、ハンドオーバー制御方法、基地局制御装置及び移動端末
KR1020087018824A KR100921511B1 (ko) 2005-03-28 2006-01-27 이동체 통신 시스템, 핸드 오버 제어 방법, 기지국제어장치 및 이동 단말
EP10172835.0A EP2252106B1 (fr) 2005-03-28 2006-01-27 Système de communication mobile, procédé de contrôle de transfert, contrôleur de réseau radio et terminal mobile
KR1020077009824A KR100864893B1 (ko) 2005-03-28 2006-01-27 액티브 셋트 제어방법
EP10172839.2A EP2252108A3 (fr) 2005-03-28 2006-01-27 SystÀ¨me de communication mobile, procédé de contrôle de transfert, contrôleur de station de base et terminal mobile
DE602006017500T DE602006017500D1 (de) 2005-03-28 2006-01-27 Mobilobjektkommunikationssystem, handoverkontrollverfahren, basisstationskontrollgerät und mobilendgerät
AU2006229008A AU2006229008C1 (en) 2005-03-28 2006-01-27 Mobile communications system, handover controlling method, radio network controller and mobile terminal
EP10172834.3A EP2252105B1 (fr) 2005-03-28 2006-01-27 Système de communication mobile, procédé de contrôle de transfert, contrôleur de réseau radio et terminal mobile
EP06712519A EP1802161B1 (fr) 2005-03-28 2006-01-27 Systeme de communication d`objet mobile, procede de commande de transfert intercellulaire, appareil de commande de stations de base et terminal mobile
EP10172838A EP2254372A1 (fr) 2005-03-28 2006-01-27 Système de communication mobile, procédé de contrôle de transfert, contrôleur de réseau radio et terminal mobile
US11/666,301 US8050222B2 (en) 2005-03-28 2006-01-27 Mobile communications system, handover controlling method, radio network controller, and mobile terminal
CN200680001161.6A CN101053276B (zh) 2005-03-28 2006-01-27 移动体通信系统、移交控制方法、基站控制装置及移动终端
JP2007021518A JP2007151167A (ja) 2005-03-28 2007-01-31 移動体通信システム、ハンドオーバー制御方法、基地局制御装置及び移動端末
JP2007272869A JP4840326B2 (ja) 2005-03-28 2007-10-19 移動端末
HK08101904.5A HK1111550A1 (en) 2005-03-28 2008-02-21 Mobile object communication system, handover control method, base station control apparatus and mobile terminal
AU2009201166A AU2009201166B2 (en) 2005-03-28 2009-03-24 Mobile communications system, handover controlling method, radio network controller and mobile terminal
JP2010254645A JP2011035943A (ja) 2005-03-28 2010-11-15 アクティブセット制御方法
JP2011141817A JP2011188534A (ja) 2005-03-28 2011-06-27 アクティブセット制御方法
US13/172,309 US8355375B2 (en) 2005-03-28 2011-06-29 Mobile communications system, handover controlling method, radio network controller, and mobile terminal

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009516983A (ja) * 2005-11-23 2009-04-23 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 非在圏基地局における予測に基づく処理資源割当てのための方法、コンピュータプログラムおよび基地局
JP4856189B2 (ja) * 2005-11-23 2012-01-18 テレフオンアクチーボラゲット エル エム エリクソン（パブル） 非在圏基地局における予測に基づく処理資源割当てのための方法、コンピュータプログラムおよび基地局

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KR20070053823A (ko) 2007-05-25
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KR100864893B1 (ko) 2008-10-22
KR20070067178A (ko) 2007-06-27

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