WO2008020473A1 - Terminal de communication mobile - Google Patents

Terminal de communication mobile Download PDF

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Publication number
WO2008020473A1
WO2008020473A1 PCT/JP2006/316049 JP2006316049W WO2008020473A1 WO 2008020473 A1 WO2008020473 A1 WO 2008020473A1 JP 2006316049 W JP2006316049 W JP 2006316049W WO 2008020473 A1 WO2008020473 A1 WO 2008020473A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
transmission power
unit
radio link
mobile communication
Prior art date
Application number
PCT/JP2006/316049
Other languages
English (en)
Japanese (ja)
Inventor
Shinsuke Uga
Yuji Inoue
Shingo Higuchi
Original Assignee
Mitsubishi Electric Corporation
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 Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to PCT/JP2006/316049 priority Critical patent/WO2008020473A1/fr
Publication of WO2008020473A1 publication Critical patent/WO2008020473A1/fr

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Classifications

    • 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 a mobile communication terminal apparatus for connecting a radio link with a plurality of base stations at the time of handover.
  • a mobile communication terminal apparatus performs soft handover in which communication is performed by connecting radio links to a plurality of base stations. At this time, the mobile communication terminal apparatus currently receives the pilot channel reception power of the base station to which the radio link is connected, or the pilot channel reception power of the base station to which the radio link is connected and the neighboring base stations. Measure the received power of the pilot channel.
  • the mobile communication terminal apparatus determines in advance the received power difference between the pilot channel received power of a certain neighboring base station and the received power of the pilot channel of the base station connected to the radio link in the system. If it falls within the specified threshold, a radio link is added to the surrounding base station where the received power difference of the pilot channel falls within the threshold.
  • the mobile communication terminal apparatus determines whether the received power of a pilot channel of a base station and the received power of a pilot channel of another base station. If the received power difference becomes larger than a threshold value determined in advance by the system, the received power difference of the pilot channel is larger than the threshold value and the received power is deteriorated. Delete the radio link with the ground station.
  • a mobile communication terminal apparatus connects a plurality of base stations and radio links at the time of handover, the mobile communication terminal apparatus uses a lot of radio resources. In order to ensure quality, it is necessary to appropriately select the base station to which the radio link is connected. In particular, in a state where the mobile communication terminal apparatus is in a stationary state and propagation path fluctuation is small, it is preferable that the number of base stations connected to the radio link be the minimum number that can ensure appropriate communication quality.
  • This mobile communication terminal apparatus measures the reception quality (SIR: Signal Interference Ratio) of each downlink dedicated channel for each base station, and based on this, the downlink dedicated channel after combining all the base stations connected to the radio link is measured.
  • the reception quality of the uplink individual channel on the base station side is poor from the radio link is deleted for the base station considered to contribute little to the communication quality, or the uplink transmission power control command included in the downlink dedicated channel
  • the radio link is deleted by the base station that requires the estimated power to exceed a certain standard.
  • the mobile communication terminal device transmits There is a possibility that the transmission power of the uplink dedicated channel or the transmission power of the downlink dedicated channel transmitted by the base station connected to the radio link will increase.
  • An increase in the transmission power of the uplink individual channel increases the interference power for the uplink individual channel of other mobile communication terminal devices, which adversely affects the uplink capacity.
  • an increase in the transmission power of the downlink dedicated channel transmitted by the base station connected to the radio link also increases the interference power for the downlink dedicated channel of other mobile communication terminal devices. It will adversely affect capacity.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2005-45316 (paragraphs 0034 to 0064)
  • the conventional mobile communication terminal is configured as described above! Therefore, in the method of reducing the network load by deleting the conventional radio link at the time of handover, the uplink capacity Or you can reduce the downlink capacity and use radio resources effectively. There was no problem.
  • the present invention has been made to solve the above-described problems.
  • a radio link can be deleted without reducing uplink capacity or downlink capacity, and radio resources can be deleted.
  • the purpose is to obtain a mobile communication terminal device that can effectively use the network.
  • the mobile communication terminal apparatus measures the received power of the pilot channel signals from the plurality of base stations in the case of connecting the radio links with the plurality of base stations at the time of handover.
  • the cell level measuring unit to perform and the uplink transmission power to the plurality of base stations are stored, and the base station whose received power of the pilot channel signal measured by the cell level measuring unit is smaller than a predetermined threshold is the communication target.
  • the base station power is deleted, and when the uplink transmission power to the plurality of base stations is higher than the stored uplink transmission power, the deleted base station is added to the base station to be communicated. It has a link selection section.
  • FIG. 1 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart showing processing of a radio link selection unit of a mobile communication terminal device according to Embodiment 1 of the present invention.
  • FIG. 3 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart showing processing of a radio link selection unit of a mobile communication terminal apparatus according to Embodiment 2 of the present invention.
  • FIG. 5 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 3 of the present invention.
  • FIG. 6 is a flowchart showing processing of a radio link selection unit of a mobile communication terminal device according to Embodiment 3 of the present invention.
  • FIG. 7 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 4 of the present invention.
  • FIG. 8 is a flowchart showing processing of a radio link selection unit of a mobile communication terminal apparatus according to Embodiment 4 of the present invention.
  • FIG. 9 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 5 of the present invention.
  • FIG. 10 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 6 of the present invention.
  • FIG. 1 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 1 of the present invention.
  • the mobile communication terminal apparatus includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a static decision unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, and an antenna 9. ing.
  • the uplink transmission power of the uplink dedicated channel signal of the mobile communication terminal apparatus is set so that the reception quality of the uplink dedicated channel signal on the base station side can be satisfied.
  • Feedback loop control is performed between devices.
  • the base station uses the uplink transmission power control command included in the downlink dedicated channel signal to increase or decrease the uplink transmission power of the uplink dedicated channel signal so that the mobile communication terminal apparatus can satisfy the reception quality of the uplink dedicated channel signal.
  • the mobile communication terminal apparatus controls the uplink transmission power of the uplink dedicated channel signal according to the received uplink transmission power control command.
  • the mobile communication terminal apparatus is in a stationary state, the propagation path fluctuation is small, and the uplink transmission power of the uplink dedicated channel signal of the mobile communication terminal apparatus is stable.
  • the radio link is deleted so that communication is performed with as few radio links as possible.
  • the uplink transmission power of the uplink individual channel signal of the mobile communication terminal device is increased.
  • the base station to communicate with is selected so as not to tl.
  • the receiving unit 1 receives a downlink RF (Radio Frequency) signal 101 that is also transmitted through the antenna 9 and is down-converted, and then performs AZD (Analog / Digital) conversion. Is converted into a received baseband signal 102 and output to the demodulator 2 and the cell level measurement unit 3.
  • RF Radio Frequency
  • AZD Analog / Digital
  • Demodulation section 2 demodulates the downlink dedicated channel signal from the communicating base station from reception baseband signal 102 output from receiving section 1, and decodes and decodes the downlink dedicated channel signal
  • the handover-related message 104 from the network is output to the radio link selection unit 5, and the uplink transmission power control command 105 included in the downlink dedicated channel signal transmitted from each base station is output to the transmission unit 8.
  • Cell level measurement unit 3 receives reception baseband signal 102 output from reception unit 1, and measures the received power of pilot channel signals of neighboring base stations not communicating with the communicating base station. Then, the reception power 106 of the measured pilot channel signals of all base stations is output to the radio link selection unit 5.
  • the stationary determination unit 4 determines whether the mobile communication terminal device is in a moving state or a stationary state by using, for example, position information by GPS (Global Positioning System) V and determines the determination result 111 as a radio link selection unit. Output to 5.
  • GPS Global Positioning System
  • the radio link selection unit 5 stores the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations, and the cell level measurement unit 3
  • the base station power with which the reception power of the pilot channel signal measured by the above is smaller than a predetermined threshold is deleted, and the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations is stored.
  • the deleted base station is added to the target base station.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station not communicating with the communicating base station measured by the cell level measuring unit 3.
  • the received power of the maximum channel channel signal of the communicating base station is equal to or higher than a predetermined threshold, and the number of communicating base stations is 2 or more
  • Selection result of storing uplink transmission power 113 from the transmission unit 8 to a plurality of base stations, and deleting a base station in communication whose received power of the noise channel signal is smaller than a predetermined threshold from the base station to be communicated 112 Is output to the call processing unit 6 so that the selection result 112 is transmitted to the network, and the received power of the pilot channel signal exceeds the predetermined threshold based on the handover related message 104 decoded by the demodulation unit 2.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the stationary determination unit 4 If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal is less than the predetermined threshold, the radio link selector 5 receives the received power of the pilot channel signal as usual.
  • the radio link selection process by, that is, the addition of a radio link with a neighboring base station or the deletion of a radio link of a base station whose pilot channel reception power is degraded.
  • the call processing unit 6 outputs an uplink dedicated channel signal 114 including the selection result 112 by the radio link selection unit 5 to the modulation unit 7.
  • Modulation section 7 modulates uplink individual channel signal 114 output from call processing section 6 and outputs transmission baseband signal 115 to transmission section 8.
  • the transmission unit 8 controls the uplink transmission power 113 of the uplink individual channel signal based on the uplink transmission power control command 105 included in the downlink individual channel signal transmitted from each base station output from the demodulation unit 2. Then, the transmission baseband signal 115 output by the modulation unit 8 is converted into a transmission RF signal 116 and transmitted via the antenna 9, and the uplink transmission power 113 of the controlled uplink individual channel signal is output to the radio link selection unit 5. .
  • FIG. 2 is a flowchart showing processing of radio link selection unit 5 of the mobile communication terminal apparatus according to Embodiment 1 of the present invention.
  • step ST10 the radio link selection unit 5 determines whether the stationary determination unit 4 uses the determination result 111.
  • the mobile communication terminal device is checked for force or power that is stationary. If it is in a stationary state, the process proceeds to step ST11. If it is in a moving state, the process proceeds to step ST17.
  • step ST11 the radio link selection unit 5 receives the pilot channel signal of the communicating base station measured by the cell level measurement unit 3. It is determined whether or not the received power of the maximum pilot channel signal out of power 106 is greater than or equal to a predetermined threshold. When the received power of the maximum pilot channel signal is equal to or greater than the predetermined threshold, the process proceeds to step ST12, and when it is less than the predetermined threshold, the process proceeds to step ST17.
  • step ST12 the radio link selection unit 5 determines whether or not the number of base stations in communication is 2 or more. judge. When the number of base stations in communication is 2 or more, the process proceeds to step ST13, and when it is 1, the process of the radio link selection unit 5 is terminated.
  • the radio link selection unit 5 stores the uplink transmission power 113 of the uplink dedicated channel signal output from the transmission unit 8. .
  • step ST14 the radio link selection unit 5 deletes the base station in communication whose pilot channel signal reception power measured by the cell level measurement unit 3 is smaller than a predetermined threshold from the base stations to be communicated.
  • the selection result 112 to be output is output to the call processing unit 6.
  • the transmission unit 8 transmits the selection result 112 to the network, and the reception unit 1 receives a response from the network.
  • the radio link selector 5 deletes the base station with which the received power of the pilot channel signal is small as the communication target base station power .
  • step ST15 the radio link selection section 5 selects the uplink transmission power 113 of the uplink individual channel signal stored in step ST13 and the base station in which the reception power of the pilot channel signal is smaller than a predetermined threshold in step ST14.
  • the base station power to be communicated with is compared with the uplink transmission power 113 of the uplink individual channel signal output by the transmitter 8 after the deletion, and the base station whose received power of the narrow channel signal is smaller than the predetermined threshold is the communication target.
  • step ST15 If the uplink transmission power 113 of the uplink dedicated channel signal is increased in step ST15, the base station power that becomes a communication target for the base station in which the reception power of the pilot channel signal is smaller than a predetermined threshold is deleted in step ST14. As a result, the uplink communication state deteriorates and the uplink channel capacity is reduced.
  • step ST16 the radio link selection unit 5 determines that the reception power of the pilot channel signal deleted in step ST14 is a predetermined threshold value. A selection result 112 for adding a smaller base station to the base station to be communicated is output to the call processing unit 6.
  • the radio link selection unit 5 adds a base station whose received power of the deleted pilot channel signal is smaller than a predetermined threshold to the base station to be communicated based on the handover-related message 104 with network power, and performs radio communication.
  • the processing of the link selection unit 5 ends.
  • step ST17 When the check result of step ST10 is in a moving state and when the reception power of the maximum pilot channel signal of the base station in communication at step ST11 is less than a threshold, in step ST17, the radio link After selecting the radio link based on the received power of the pilot channel signal as usual, the selecting unit 5 adds a radio link with a neighboring base station, or the received power of the noise channel deteriorates. The radio link of the base station being deleted is deleted, and the processing of the radio link selector 5 is terminated.
  • the radio link selection unit 5 determines that the received power of the pilot channel signal is high when the mobile communication terminal apparatus is in a stationary state based on the determination result 111 of the stationary determination unit 4. Although the base station power that is the target of communication is deleted, the base station that is communicating is smaller than the predetermined threshold, but the radio link selection unit 5 receives the pilot channel signal reception power regardless of the determination result 111 of the stationary determination unit 4. A base station that is communicating with a base station whose communication is smaller than a predetermined threshold may be deleted.
  • the radio link selection unit 5 does not increase the uplink transmission power 113 of the uplink individual channel signal of the transmission unit 8, so that the pilot channel signal Base station power for communication with base stations in communication whose received power is less than a predetermined threshold By doing so, it is possible to delete the radio link without reducing the uplink capacity at the time of handover, and the effect that the radio resource can be effectively used is obtained.
  • the radio link selection unit 5 when the mobile communication terminal is stationary, the radio link selection unit 5 does not increase the uplink transmission power 113 of the uplink dedicated channel signal of the transmission unit 8.
  • the uplink transmission power to the base station is stabilized, so that the radio link can be accurately established. It can be deleted, and it is possible to effectively use radio resources.
  • FIG. 3 is a block diagram showing the configuration of the mobile communication terminal apparatus according to Embodiment 2 of the present invention.
  • This mobile communication terminal apparatus includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a quiesce determining unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, an antenna 9, and a base.
  • the base station transmission power estimation unit 10 is provided, the base station transmission power estimation unit 10 is added to the mobile communication terminal apparatus shown in FIG. 1 of the first embodiment, and the communication link is transmitted from the transmission unit 8 shown in FIG.
  • the output of the uplink transmission power 113 to the network selector 5 is deleted, and the other configurations are the same as those shown in FIG.
  • the downlink transmission power of the downlink dedicated channel signal of the base station is such that the reception quality of the downlink dedicated channel signal on the mobile communication terminal apparatus side can be satisfied with the mobile communication terminal apparatus.
  • Loop control is performed between base stations.
  • the mobile communication terminal apparatus increases or decreases the downlink transmission power of the downlink dedicated channel signal by a downlink transmission power control command included in the uplink dedicated channel signal so that the reception quality of the downlink dedicated channel signal can be satisfied with respect to the base station.
  • the base station controls the downlink transmission power of the downlink dedicated channel signal according to the received downlink transmission power control command.
  • the radio communication resource In order to effectively use the wireless link, the wireless link is deleted so that communication is performed with as few wireless links as possible.
  • the base station with which the mobile communication terminal apparatus communicates is selected so that the sum of the downlink transmission power of the downlink dedicated channel signals of all the base stations is not increased.
  • demodulating section 2 demodulates the downlink dedicated channel signal from the communicating base station from received baseband signal 102 output from receiving section 1, as in the first embodiment. Then, the downlink dedicated channel signal is decoded, the handover related message 104 from the decoded network is output to the radio link selection unit 5, and the uplink transmission power control command included in the downlink dedicated channel signal transmitted from each base station 105 is output to the transmission unit 8. In the second embodiment, the transmission power 103 of the pilot channel signal of each base station included in the downlink dedicated channel signal is further output to the cell level measurement unit 3.
  • the cell level measuring unit 3 receives the received baseband signal 102 output from the receiving unit 1, and receives information from the neighboring base stations that are not communicating with the communicating base station.
  • the demodulator 2 further outputs the received power.
  • the propagation path loss 107 between the base stations is calculated and output to the base station transmission power estimation unit 10.
  • the base station transmission power estimation unit 10 receives the reception baseband signal 102 output from the reception unit 1, measures the received power of the downlink dedicated channel signal for each base station in communication, and measures the cell level. Based on the transmission path loss 107 for each base station measured by unit 3 and the received power of the downlink dedicated channel signal for each base station measured, the downlink transmission power 108 of the downlink dedicated channel signal of each base station in communication is estimated. To the radio link selector 5.
  • Radio link selection section 5 stores the sum of the downlink transmission powers of a plurality of base stations estimated by base station transmission power estimation section 10 when determination result 111 by stationary determination section 4 is stationary.
  • the base station power with which the downlink transmission power estimated by the base station transmission power estimation unit 10 is the maximum is deleted, and the base station transmission power estimation unit 10 estimates the downlink transmission power of the plurality of base stations. If the sum of the received data is greater than the total stored downlink transmission power, the deleted base station is added to the base station to be communicated.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the base station transmission power
  • the selection result 112 is transmitted to the network by outputting the selection result 112 to the call processing unit 6 to delete the base station with which the downlink transmission power 108 of the estimated downlink dedicated channel signal is maximum is the communication target.
  • Recovery department Based on the handover-related message 104 from the network decoded in step 2, the base station with the maximum downlink transmission power 108 of the estimated downlink individual channel signal is deleted from the communication target base station, and the base station transmission power is When the sum of the downlink transmission power of the plurality of base stations estimated by the estimation unit 10 is larger than the stored downlink transmission power, the deleted base station is added to the communication target base station. To do.
  • radio link selection section 5 receives pilot channel signal received power 106 of a neighboring base station that is not in communication with the communicating base station measured by cell level measuring section 3, and stationary determination section 4 If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal is less than the predetermined threshold, the radio link selector 5 receives the received power of the pilot channel signal as usual.
  • the radio link selection process by, that is, addition of a radio link with a neighboring base station or deletion of a radio link with a base station whose pilot channel reception power is degraded.
  • FIG. 4 is a flowchart showing processing of radio link selection unit 5 of the mobile communication terminal apparatus according to Embodiment 2 of the present invention.
  • steps ST20 to ST22 and ST27 is the same as the processing of steps ST10 to ST12 and ST17 shown in FIG. 2 of the first embodiment.
  • step ST23 the radio link selection unit 5 determines each base station in communication estimated by the base station transmission power estimation unit 10.
  • the total downlink transmission power 108 of the downlink dedicated channel signal of the station is summed, and the total downlink transmission power 108 of the downlink dedicated channel signal is stored.
  • radio link selection section 5 outputs selection result 112 for deleting the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal to call processing section 6. After that, based on the handover-related message 104 from the network, the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal is deleted.
  • the radio link selection unit 5 estimates the base station transmission power estimation unit 10 in step ST25.
  • the sum of the downlink transmission power 108 of all the base stations that are in communication, and the estimated downlink individual power of all the base stations after deleting the base station with the maximum downlink transmission power 108 of the estimated downlink individual channel signal The sum of the downlink transmission power 108 of the channel signal and the sum of the downlink transmission power 108 of the estimated downlink dedicated channel signal stored in step ST23 above are compared, and the downlink transmission power 10 of the estimated downlink dedicated channel signal 10 is compared.
  • step ST26 It is determined whether the sum of the downlink transmission power 108 of the estimated downlink individual channel signal after the deletion of the base station with the largest 8 is increased, and the total downlink transmission power 108 of the downlink individual channel signal is Increased process proceeds to step ST26 when are, if not increased returns to scan Tetsupu ST22, and repeats the process of step ST22 ⁇ ST24.
  • the downlink transmission power 108 of the downlink dedicated channel signal estimated in step ST24 communicates with the maximum base station.
  • the link selection unit 5 outputs the selection result 112 for adding the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal deleted in step ST24 to the call processing unit 6. After that, based on the handover-related message 104 from the network, a base station with the maximum downlink transmission power 108 of the estimated estimated downlink individual channel signal is added, and the processing of the radio link selection unit 5 is terminated. .
  • the radio link selection unit 5 determines the determination result 11 of the stationary determination unit 4. 1) When the mobile communication terminal device is in a stationary state, the base station power with which the downlink transmission power 108 of the estimated downlink dedicated channel signal is maximum is deleted. Regardless of the determination result 111, the radio link selection unit 5 may delete the base station having the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal from the base stations to be communicated.
  • the radio link selection unit 5 does not increase the sum of the downlink transmission power 108 of the downlink dedicated channel signals estimated by the base station.
  • the radio link is deleted without reducing the downlink capacity at the time of handover. Can be obtained, and wireless resources can be effectively used.
  • the radio link selection unit 5 adds the downlink transmission power 108 of the downlink dedicated channel signal estimated by the base station. As shown in FIG. 1, the base station power of the base station with which the downlink transmission power 108 of the estimated downlink individual channel signal is maximum is deleted, so that the downlink individual channel signal of the base station can be downloaded. Since it is possible to improve the estimation accuracy of the transmission power 108, it is possible to delete the radio link with high accuracy and to further effectively use radio resources.
  • FIG. 5 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 3 of the present invention.
  • This mobile communication terminal apparatus includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a quiesce determining unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, an antenna 9, and a base.
  • a base station transmission power measurement unit 10 is provided, and a base station transmission power measurement unit 10 similar to that of the second embodiment is added to the mobile communication terminal device shown in FIG. 1 of the first embodiment.
  • Other configurations are the same as those shown in FIG.
  • the third embodiment is a combination of the first embodiment and the second embodiment.
  • Embodiment 3 when the mobile communication terminal apparatus is in a stationary state, the propagation path fluctuation is small, and the uplink transmission power of the uplink dedicated channel signal of the mobile communication terminal apparatus is stable. In order to effectively use radio communication resources, radio links are deleted so that communication is performed with as few radio links as possible. At this time, all base stations in communication with mobile communication terminal devices are estimated. The mobile communication terminal apparatus communicates so that the total downlink transmission power of the downlink dedicated channel signal is not increased and the uplink transmission power of the uplink dedicated channel signal of the mobile communication terminal apparatus is not increased. A base station is selected.
  • the radio link selection unit 5 stores the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations, Stores the total downlink transmission power of the plurality of base stations estimated by the base station transmission power estimation unit 10, and the base station with the maximum downlink transmission power estimated by the base station transmission power estimation unit 10 as a communication target
  • the base station transmission power estimation unit 10 estimates a plurality of base stations. If the total downlink transmission power of the station is higher than the stored downlink transmission power, the deleted base station is added to the base station to be communicated.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the base station transmission power
  • the downlink transmission power 108 of the downlink individual channel signal of each base station in communication estimated by the estimation unit 10 is input, and the determination result 111 by the stationary determination unit 4 is in a stationary state, and the largest pilot of the base station in communication
  • the uplink transmission power 113 from the transmitter 8 to the plurality of base stations is stored, and the base station transmission power is estimated.
  • Selection result of storing the total downlink transmission power of the plurality of base stations estimated by the unit 10 and deleting the estimated base station power with which the downlink transmission power 10 8 of the downlink dedicated channel signal is maximum is the communication target 112 is output to call processor 6 As a result, the selection result 112 is transmitted to the network, and the estimated downlink transmission power 108 of the downlink dedicated channel signal is communicated to the base station based on the handover-related message 104 from the network decoded by the demodulator 2.
  • the deleted base station is added to the base station to be communicated.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the stationary determination unit 4 If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal of the base station in communication is less than a predetermined threshold, the radio link selection unit 5 Radio link selection processing based on signal reception power, that is, addition of radio links with neighboring base stations, and deletion of radio links with base stations whose pilot channel reception power is degraded.
  • FIG. 6 is a flowchart showing processing of radio link selection unit 5 of the mobile communication terminal apparatus according to Embodiment 3 of the present invention.
  • steps ST30 to ST33 and ST39 is the same as the processing of steps ST20 to ST23 and ST27 in FIG. 4 of the second embodiment.
  • step ST34 the radio link selection unit 5 performs uplink transmission power of the uplink dedicated channel signal in the transmission unit 8 in the same manner as in step ST13 in FIG. 2 of the first embodiment.
  • radio link selection section 5 performs the same processing as in step ST24 in FIG. 4 of Embodiment 2 above, with the base station having the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal.
  • the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal is deleted based on the handover-related message 104 of the network power.
  • step ST36 the radio link selection unit 5 transmits the uplink transmission power 113 of the uplink dedicated channel signal of the transmission unit 8 stored in step ST34 and the downlink individual channel signal estimated in step ST35. Compares the uplink transmission power 113 of the uplink individual channel signal of the transmitter 8 after deleting the base station with the maximum transmission power 108, and deletes the base station with the maximum downlink transmission power 108 of the estimated downlink individual channel signal It is determined whether or not the uplink transmission power 113 of the uplink dedicated channel signal of the subsequent transmitter 8 is increasing, and the uplink dedicated channel signal of the transmitter 8 is determined. When the uplink transmission power 113 of the signal has increased, the process proceeds to step ST38, and when it has not increased, the process proceeds to step ST37.
  • radio link selecting section 5 performs downlink transmission power of the downlink dedicated channel signal estimated in step ST35 in the same manner as in step ST25 in FIG. 4 of Embodiment 2 above. Estimated by summing the downlink transmission power 108 of the downlink dedicated channel signals transmitted by all the base stations in communication estimated by the base station transmission power estimation unit 10 after deleting the base station with the largest 108. Stored in step ST33 above and the sum of the downlink transmission power 108 of the estimated downlink individual channel signals transmitted by all the base stations after deleting the base station with the maximum downlink transmission power 108 of the downlink dedicated channel signal.
  • the estimated downlink dedicated channel after deleting the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal is deleted.
  • the uplink transmission power 113 of the uplink dedicated channel signal of the transmission unit 8 increases after deleting the base station having the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal in Step ST36 above, or If the downlink transmission power 108 of the estimated downlink dedicated channel signal after the deletion of the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal is increased in step ST37 above, the radio link is selected.
  • the unit 5 deletes the base station having the maximum downlink transmission power 108 of the downlink dedicated channel signal estimated in step ST35 from the base station to be communicated, and as a result, the uplink dedicated channel requested by the base station to the mobile communication terminal device.
  • the uplink transmission power 113 of the signal is increased or the total downlink transmission power of the downlink dedicated channel signal requested by the mobile communication terminal apparatus is increased.
  • the selection result 112 for adding the base station having the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal that has been deleted is output to the call processing unit 6.
  • the radio link selection unit 5 adds a base station with the maximum downlink transmission power 108 of the estimated estimated downlink individual channel signal deleted based on the handover-related message 104 from the network, and performs communication.
  • the processing of the link selection unit 5 ends.
  • the radio link selection unit 5 uses the determination result 111 of the stationary determination unit 4 to determine the estimated downlink dedicated channel signal when the mobile communication terminal device is stationary.
  • the power of the base station with which the downlink transmission power 108 is the maximum is deleted.
  • the base station with the maximum downlink transmission power 108 may be deleted from the base stations to be communicated.
  • the radio link selection unit 5 does not increase the uplink transmission power 113 of the uplink dedicated channel signal transmitted by the mobile communication terminal apparatus, and The total downlink transmission power 108 of downlink dedicated channel signals transmitted by the base station is increased! Therefore, by deleting the base station with the maximum downlink transmission power 108 of the downlink dedicated channel signal from the base station to be communicated, the uplink capacity and the downlink capacity are not reduced at the time of handover. If the wireless link can be deleted and wireless resources can be used effectively, the! / ⁇ ⁇ effect can be obtained.
  • the radio link selection unit 5 performs the uplink transmission power of the uplink dedicated channel signal transmitted by the mobile communication terminal apparatus.
  • the downlink transmission power 108 of the estimated downlink dedicated channel signal is the maximum so that the total downlink transmission power 108 of the downlink dedicated channel signal transmitted by the base station does not increase.
  • FIG. 7 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 4 of the present invention.
  • This mobile communication terminal apparatus includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a static decision unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, an antenna 9, and a receiving unit.
  • the reception quality measurement unit 11 is provided, and the reception quality measurement unit 11 is added to the mobile communication terminal apparatus shown in FIG. 1 of the first embodiment. Other configurations are the same as those shown in FIG. It is equivalent.
  • the fourth embodiment is a combination of the first embodiment and the determination of the reception quality of the downlink dedicated channel signal.
  • Embodiment 4 when the mobile communication terminal apparatus is in a stationary state, there is little propagation path fluctuation, and the uplink transmission power of the uplink dedicated channel signal of the mobile communication terminal apparatus is stable, the radio communication resource In order to effectively use the network, the radio link is deleted so that communication is performed with as few radio links as possible. At this time, the uplink transmission power of the uplink individual channel signal of the mobile communication terminal apparatus is not increased. In addition, the base station for communication is selected so that the reception quality of the downlink dedicated channel signal does not deteriorate.
  • the reception quality measurement unit 11 calculates the reception quality 109 of the downlink dedicated channel signal after combining the radio links based on the reception baseband signals 102 output from the reception unit 1 from all the communicating base stations. Measure and output to radio link selector 5. Note that SIR, BLER (Block Error Rate), BER (Bit Error Rate), or the like may be used as an index by which the reception quality measurement unit 11 evaluates reception quality.
  • the radio link selection unit 5 stores the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations, and the reception quality measurement unit 11
  • the reception quality of a plurality of base station powers measured by the base station is stored, and the reception power of the nolot channel signal measured by the cell level measurement unit 3 is smaller than a predetermined threshold value. If the uplink transmission power 11 3 from the transmission unit 8 to the plurality of base stations is stored and increased more than the uplink transmission power, or the reception quality measurement unit 11
  • the deleted base station is added to the base station to be communicated.
  • the radio link selection unit 5 receives the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and receives the stationary determination unit 4 If the determination result 111 is static, the received power of the largest pilot channel signal of the base station in communication is greater than or equal to a predetermined threshold, and the number of base stations in communication is two or more, the transmission unit 8 Stores uplink transmission power 113 to a plurality of base stations, stores reception qualities of a plurality of base station powers measured by the reception quality measuring unit 11, and is performing communication during which the reception power of the pilot channel signal is smaller than a predetermined threshold Base station power to be able to communicate with other base stations
  • the selection result 112 to be deleted is output to the call processing unit 6 to transmit the selection result 112 to the network, and the pilot channel signal is received based on the handover-related message 104 from the network decoded by the demodulation unit 2.
  • a base station whose power is smaller than a predetermined threshold value is deleted from the base station to be communicated, and the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations is stored and increased from the uplink transmission power. If the received quality of multiple base stations measured by the received quality measurement unit 11 is inferior to the stored received quality, the deleted base station is the base station that is the target of communication. Add to
  • the radio link selection unit 5 also receives the received power 106 of the pilot channel signal of a neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the stationary determination unit 4 If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal is less than the predetermined threshold, the radio link selector 5 receives the received power of the pilot channel signal as usual.
  • the radio link selection process by, that is, addition of a radio link with a neighboring base station or deletion of a radio link with a base station whose pilot channel reception power is degraded.
  • FIG. 8 is a flowchart showing processing of radio link selection unit 5 of the mobile communication terminal apparatus according to Embodiment 4 of the present invention.
  • steps ST40 to ST42 and ST49 is the same as the processing of steps ST10 to ST12 and ST17 shown in FIG. 2 of the first embodiment.
  • step ST43 the radio link selection unit 5 receives the downlink dedicated channel signal reception quality measured by the reception quality measurement unit 11 109 Remember.
  • radio link selection section 5 stores uplink transmission power 113 of the uplink dedicated channel signal of transmission section 8 in the same manner as in step ST13 of FIG. 2 of Embodiment 1 above. .
  • step ST45 the radio link selection unit 5 determines that the received power of the pilot channel signal measured by the cell level measurement unit 3 is the same as in step ST14 of Fig. 2 in the first embodiment.
  • Base station power to communicate with a base station that is communicating below a predetermined threshold The selection result 112 to be deleted is output to the call processing unit 6.
  • the transmission unit 8 transmits the selection result 112 to the network, and the reception unit 1 receives a response from the network.
  • the radio link selector 5 selects a base station whose received power of the pilot channel signal is smaller than a predetermined threshold as a communication target base station. Force delete.
  • radio link selection section 5 performs the uplink transmission power of the uplink dedicated channel signal of transmission section 8 stored in step ST44 in the same manner as in step ST15 in FIG. 2 of Embodiment 1 above.
  • 113 is compared with the uplink transmission power 113 of the uplink individual channel signal of the transmitter 8 after deleting the base station whose reception power of the pilot channel signal is smaller than the predetermined threshold in step ST45, and the reception power of the pilot channel signal is predetermined. It is determined whether the uplink transmission power 113 of the transmission unit 8 after the deletion of the base station smaller than the threshold value is increased or not, and the uplink transmission power 113 of the uplink dedicated channel signal of the transmission unit 8 is increased. If yes, go to step ST48 and increase, otherwise go to step ST47.
  • step ST47 the radio link selection unit 5 receives the reception quality 109 of the lower dedicated channel signal stored in step ST43 and the base station in which the reception power of the pilot channel signal in step ST45 is smaller than a predetermined threshold. Is compared with the reception quality 109 of the downlink dedicated channel signal measured by the received quality measurement unit 11 after deleting the base station and the base station whose received power of the pilot channel signal is smaller than the predetermined threshold is deleted. If the reception quality 109 has deteriorated! /, If so, the process returns to step ST42 and repeats the processing of steps ST42 to ST46, and if it has deteriorated, the process proceeds to step ST48.
  • the radio link selection unit 5 uses the uplink transmission power of the uplink dedicated channel signal requested by the base station to the mobile communication terminal device.
  • the radio link selector 5 determines that the reception power of the pilot channel signal is a predetermined value in step ST45. Is smaller than the threshold value ⁇
  • the reception quality 109 of the downlink dedicated channel signal has deteriorated.
  • the radio link selection unit 5 adds a base station whose received power of the deleted pilot channel signal is smaller than a predetermined threshold according to an instruction from the network, and ends the processing of the radio link selection unit 5.
  • the radio link selection unit 5 uses the determination result 111 of the stationary determination unit 4 so that the received power of the pilot channel signal is high when the mobile communication terminal device is stationary. Although the base station power that is the target of communication is deleted, the base station that is communicating is smaller than the predetermined threshold, but the radio link selection unit 5 receives the pilot channel signal reception power regardless of the determination result 111 of the stationary determination unit 4. A base station that is communicating with a base station whose communication is smaller than a predetermined threshold may be deleted.
  • the radio link selection unit 5 does not increase the uplink transmission power 113 of the uplink individual channel signal of the transmission unit 8!
  • the base station that is in communication with the received power of the pilot channel signal that is smaller than the predetermined threshold is deleted, and the base station power to be communicated is deleted. If the radio link can be deleted without reducing the line capacity and radio resources can be used effectively, the effect can be obtained.
  • radio link selection section 5 when the mobile communication terminal apparatus is stationary, radio link selection section 5 does not increase uplink transmission power 113 of the uplink dedicated channel signal of transmission section 8.
  • radio link selection section 5 in order not to degrade the reception quality 109 of the downlink dedicated channel signal, by deleting the base station power to be communicated with the base station in communication with which the reception power of the neurochannel signal is smaller than a predetermined threshold, Since the uplink transmission power to the base station is stable and the measurement accuracy of the reception quality 109 of the downlink individual channel signal can be improved, the radio link can be deleted with high accuracy, and radio resources can be used more effectively. The effect that it can be used is obtained.
  • FIG. 9 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 5 of the present invention.
  • This mobile communication terminal device includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a static decision unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, an antenna 9, a base A station transmission power estimation unit 10 and a reception quality measurement unit 11;
  • the reception quality measuring unit 11 is added to the mobile communication terminal apparatus shown in FIG. 3, and the other configuration is the same as that shown in FIG.
  • the fifth embodiment is a combination of the second embodiment and the determination of the reception quality of the downlink dedicated channel signal.
  • the reception quality measuring unit 11 is based on the received baseband signals 102 of all the base stations that are communicating and output from the receiving unit 1 as in the fourth embodiment. Then, the reception quality 109 of the downlink dedicated channel signal after combining the radio links is measured and output to the radio link selection unit 5.
  • Radio link selection section 5 stores the sum of downlink transmission powers 108 of a plurality of base stations estimated by base station transmission power estimation section 10 when determination result 111 by stationary determination section 4 is stationary.
  • the reception quality measurement unit 11 stores the reception quality 110 of the plurality of base station powers, and the base station with the maximum downlink transmission power 108 estimated by the base station transmission power estimation unit 10 is the communication target.
  • the deleted base station is added to the base station to be communicated.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not in communication with the communicating base station measured by the cell level measuring unit 3, and the base station transmission power
  • the reception quality 109 of the plurality of base station powers measured by the reception quality measuring unit 11 is stored, and the base station power of the base station with which the downlink transmission power 108 of the estimated downlink individual channel signal is the maximum is the communication target.
  • Delete Selection result 112 The selection result 112 is transmitted to the network by outputting it to the call processing unit 6, and the downlink transmission power of the downlink dedicated channel signal estimated based on the handover related message 104 from the network decoded by the demodulation unit 2 108 Is the largest base station
  • the base station power to be communicated is also deleted, and the sum of the downlink transmission powers 108 of the plurality of base stations estimated by the base station transmission power estimation unit 10 is stored and increased by more than the sum of the downlink transmission powers 108. If the received quality 109 of a plurality of base stations measured by the received quality measuring unit 11 is degraded from the stored received quality 109, the deleted base station is the base station to be communicated. Add to station.
  • Radio link selection section 5 also receives received power 106 of pilot channel signals from neighboring base stations that are not communicating with the communicating base station, measured by cell level measuring section 3, If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal is less than the predetermined threshold, the radio link selector 5 receives the received power of the pilot channel signal as usual.
  • the radio link selection process by, that is, addition of a radio link with a neighboring base station or deletion of a radio link with a base station whose pilot channel reception power is degraded.
  • the radio link selection unit 5 uses the determination result 111 of the stationary determination unit 4 to determine the estimated downlink dedicated channel signal when the mobile communication terminal device is stationary.
  • the power of the base station with which the downlink transmission power 108 is the maximum is deleted.
  • the base station with the maximum downlink transmission power 108 may be deleted from the base stations to be communicated.
  • the radio link selection unit 5 does not increase the total downlink transmission power 108 of the downlink dedicated channel signal estimated by the base station, and The base station having the maximum downlink transmission power 108 of the estimated downlink individual channel signal is deleted so as not to degrade the reception quality 109 of the downlink dedicated channel signal.
  • the radio link can be deleted without reducing the downlink capacity, and the radio resources can be effectively used.
  • the radio link selection unit 5 adds the downlink transmission power 108 of the downlink dedicated channel signal estimated by the base station.
  • the reception quality 109 of the downlink dedicated channel signal is not degraded.
  • the estimation accuracy of the downlink transmission power 108 of the downlink dedicated channel signal and the downlink are reduced by deleting the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal from the base station to be communicated. Since the measurement accuracy of the reception quality of individual channel signal 109 can be improved, the radio link can be deleted with high accuracy, and the radio resources can be used more effectively. It is done.
  • FIG. 10 is a block diagram showing a configuration of a mobile communication terminal apparatus according to Embodiment 6 of the present invention.
  • This mobile communication terminal device includes a receiving unit 1, a demodulating unit 2, a cell level measuring unit 3, a static decision unit 4, a radio link selecting unit 5, a call processing unit 6, a modulating unit 7, a transmitting unit 8, an antenna 9, a base
  • the transmission power estimation unit 10 and the reception quality measurement unit 11 are provided, and the reception quality measurement unit 11 is added to the mobile communication terminal apparatus shown in FIG. 5 of Embodiment 3 above.
  • the configuration is the same as that shown in FIG.
  • the sixth embodiment is a combination of the third embodiment and the determination of the reception quality of the downlink dedicated channel signal.
  • the reception quality measuring unit 11 is based on the received baseband signals 102 of all the base station powers output from the receiving unit 1 as in the fourth embodiment. Then, the reception quality 109 of the downlink dedicated channel signal after combining the radio links is measured and output to the radio link selection unit 5.
  • the radio link selection unit 5 stores the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations, and estimates the base station transmission power.
  • Stores the sum of downlink transmission power 108 of multiple base stations estimated by the fixed unit 10 stores reception quality 109 of multiple base station powers measured by the reception quality measurement unit 11, and estimates base station transmission power
  • the base station with the largest downlink transmission power 108 estimated by the unit 10 is deleted from the base station to be communicated, and the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations is recorded!
  • the radio link selection unit 5 receives the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and transmits the base station transmission power.
  • the downlink transmission power 108 of the downlink individual channel signal of each base station in communication estimated by the estimation unit 10 is input, and the determination result 111 by the stationary determination unit 4 is in a stationary state, and the largest pilot of the base station in communication
  • the uplink transmission power 113 from the transmitter 8 to the plurality of base stations is stored, and the base station transmission power is estimated.
  • the sum of the downlink transmission power 108 of the plurality of base stations estimated by the unit 10 is stored, the reception quality 109 from the plurality of base stations measured by the reception quality measuring unit 11 is stored, and the estimated downlink dedicated channel signal
  • the downlink transmission power of 108 is
  • the selection result 112 for deleting a large base station to be communicated is output to the call processing unit 6 by sending the selection result 112 to the network, and the handover result from the network decoded by the demodulation unit 2
  • the base station with the maximum downlink transmission power 108 of the estimated downlink dedicated channel signal is deleted from the base station to be communicated based on the message 104 of the above, and the uplink transmission power from the transmission unit 8 to the plurality of base stations is deleted.
  • the total of the downlink transmission power 108 of the plurality of base stations estimated by the base station transmission power estimation unit 10 is increased.
  • the reception quality 109 of multiple base stations measured by the reception quality measuring unit 11 is degraded from the stored reception quality 109, the deleted base station is added to the base station to be communicated To do.
  • the radio link selection unit 5 inputs the received power 106 of the pilot channel signal of the neighboring base station that is not communicating with the communicating base station measured by the cell level measuring unit 3, and the stationary determination unit 4 If the determination result 111 is not stationary, or if the received power of the maximum pilot channel signal is less than the predetermined threshold, the radio link selector 5 receives the received power of the pilot channel signal as usual.
  • the radio link selection process by, that is, addition of a radio link with a neighboring base station or deletion of a radio link with a base station whose pilot channel reception power is degraded.
  • the radio link selection unit 5 uses the determination result 11 1 of the stationary determination unit 4 to estimate the downlink dedicated channel when the mobile communication terminal apparatus is stationary.
  • the base station power with which the signal downlink transmission power 108 is the maximum is the base station power that is the target of communication Deleted Force Regardless of the determination result 111 of the stationary determination unit 4, the radio link selection unit 5
  • the base station with the largest downlink transmission power 108 may be deleted from the base stations to be communicated.
  • the radio link selection unit 5 prevents the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations from increasing, and the base station The downlink transmission power of the estimated downlink individual channel signal so that the total downlink transmission power 108 of the estimated downlink individual channel signal does not increase and the reception quality 109 of the downlink individual channel signal is not degraded.
  • the radio link can be deleted without reducing the downlink capacity at the time of handover, and radio resources can be used effectively. If you can, you can get the effect.
  • the radio link selection unit 5 increases the uplink transmission power 113 from the transmission unit 8 to the plurality of base stations. It is estimated so that the total downlink transmission power 108 of the downlink dedicated channel signal estimated by the base station does not increase, and the received quality 109 of the downlink dedicated channel signal is not deteriorated.
  • the uplink transmission power to the base station is stabilized, and the estimation accuracy of the downlink transmission power 108 of the downlink dedicated channel signal is stabilized. Since it is possible to improve the measurement accuracy of the reception quality 109 of the downlink dedicated channel signal and 109, it is possible to delete the radio link with high accuracy and to further effectively use radio resources. Cormorants effect Ru obtained.
  • the mobile communication terminal apparatus for example, at the time of handover, deletes a radio link without reducing uplink capacity or downlink capacity, and effectively uses radio resources. Suitable for what to do.

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

Abstract

Terminal de communication mobile établissant des liaisons sans fil avec une pluralité de stations de base pendant un transfert. Dans le terminal de communication mobile, un élément de définition au niveau cellule (3) définit une puissance de réception (106) d'un signal de canal pilote à partir de chaque station d'une pluralité de stations de base. Un élément de sélection de liaison sans fil (5) qui enregistre les puissances de transmission amont (113) pour la pluralité de stations de base, élimine, parmi les stations de base avec lesquelles le terminal de communication communique potentiellement, celles pour lesquelles les puissances de réception (106) des signaux de canal pilote définies par l'élément de définition au niveau cellule (3) sont inférieures à une valeur seuil prédéfinie. Lorsque les puissances de transmission amont (113) pour les stations de base dépassent les puissances de transmission amont enregistrées (113), l'élément de sélection de liaison sans fil (5) ajoute les stations de base éliminées aux stations de base avec lesquelles le terminal de communication mobile communique potentiellement.
PCT/JP2006/316049 2006-08-15 2006-08-15 Terminal de communication mobile WO2008020473A1 (fr)

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WO2011058944A1 (fr) * 2009-11-10 2011-05-19 住友電気工業株式会社 Dispositif de station de base
JP2012204974A (ja) * 2011-03-24 2012-10-22 Hitachi Ltd 無線通信システム、基地局装置及び無線通信方法
CN103227671A (zh) * 2012-01-31 2013-07-31 中兴通讯股份有限公司 一种预编码指示的设置方法、装置及系统
WO2013113223A1 (fr) * 2012-01-31 2013-08-08 中兴通讯股份有限公司 Système de diversité d'émission en boucle fermée en liaison montante et son procédé de traitement d'une anomalie d'indication de précodage

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Publication number Priority date Publication date Assignee Title
WO2010045771A1 (fr) * 2008-10-22 2010-04-29 中兴通讯股份有限公司 Procédé et terminal permettant la détermination de seuils de diversité de transfert intercellulaire sans coupure
CN101730161B (zh) * 2008-10-22 2012-09-05 中兴通讯股份有限公司 软切换分集门限的确定方法及终端
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JP2012204974A (ja) * 2011-03-24 2012-10-22 Hitachi Ltd 無線通信システム、基地局装置及び無線通信方法
CN103227671A (zh) * 2012-01-31 2013-07-31 中兴通讯股份有限公司 一种预编码指示的设置方法、装置及系统
WO2013113223A1 (fr) * 2012-01-31 2013-08-08 中兴通讯股份有限公司 Système de diversité d'émission en boucle fermée en liaison montante et son procédé de traitement d'une anomalie d'indication de précodage
CN103227671B (zh) * 2012-01-31 2017-09-05 中兴通讯股份有限公司 一种预编码指示的设置方法、装置及系统

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