WO2005011152A1 - Dispositif de mesure de qualite de transmission, dispositif de commande de canal et station radio de base - Google Patents

Dispositif de mesure de qualite de transmission, dispositif de commande de canal et station radio de base Download PDF

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Publication number
WO2005011152A1
WO2005011152A1 PCT/JP2003/009440 JP0309440W WO2005011152A1 WO 2005011152 A1 WO2005011152 A1 WO 2005011152A1 JP 0309440 W JP0309440 W JP 0309440W WO 2005011152 A1 WO2005011152 A1 WO 2005011152A1
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WO
WIPO (PCT)
Prior art keywords
transmission
radio
wireless
station
base station
Prior art date
Application number
PCT/JP2003/009440
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English (en)
Japanese (ja)
Inventor
Seiichi Yamaguchi
Shinya Hatakeyama
Yutaka Hamada
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2003/009440 priority Critical patent/WO2005011152A1/fr
Priority to JP2005504571A priority patent/JPWO2005011152A1/ja
Publication of WO2005011152A1 publication Critical patent/WO2005011152A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management

Definitions

  • the present invention relates to a wireless communication system including a plurality of transmitting terminals and a wireless station for diversity receiving received waves arriving in parallel from these transmitting terminals.
  • the present invention relates to a transmission quality measuring device that measures the transmission quality of a downlink radio transmission path to a station, a channel control device that appropriately forms the downlink radio transmission line, and a radio base station.
  • Spread-spectrum communication systems such as CDMA (Code Division Multiple Access) are suitable for effective use of radio frequencies and inherently have high resistance to interference and confidentiality of transmission information. Has been actively applied to wireless systems. Further, in a mobile communication system to which such a spread spectrum communication method is applied, a plurality of received waves arriving in parallel from a plurality of radio base stations or arriving via a multipath are rake combined (maximum ratio). As a result, soft handover is performed in which transmission quality is maintained at a high level and channel switching can be performed without any interruption of a communication signal.
  • CDMA Code Division Multiple Access
  • FIG. 5 is a diagram illustrating a configuration example of a mobile communication system in which soft handover is performed.
  • a base station control station 20 is connected to a mobile exchange (not shown) via an interoffice link 21 and a radio base station 30-1 via a communication link 22-1 to 22-n. ⁇ 30-n respectively.
  • a mobile exchange not shown
  • a radio base station 30-1 via a communication link 22-1 to 22-n.
  • 30-n respectively.
  • the mobile station 40 is located at the location where the mobile station is located.
  • the base station control station 20 is composed of the following elements.
  • ARQ generator 23 and control information generator 24 cascaded to the downstream link of inter-station link 21 ⁇
  • a base station selection unit 25 cascaded to the control information generation unit 24 and connected at one end of the communication links 22-1 to 22-n to downstream links of these communication links 22-1 to 22-n
  • the radio base station 30-1 is composed of the following elements.
  • Transmitter 32-1 connected to the downstream link of communication link 22-1 at the other end of communication link 2 2_1
  • a receiving unit connected to the upstream link of the communication link 22-1 at the other end of the communication link 22-1
  • a control section 34-1 having input / output ports connected to the control terminals of the transmission section 32-1 and the reception section 33-1, respectively.
  • the configuration of the radio base stations 30-2 to 30-n is the same as the configuration of the radio base station 30-1.
  • ”To“ nj ” are assigned a common code, and description thereof is omitted here.
  • the mobile station 40 includes the following elements.
  • the receiving unit 4 3 cascaded to the reception output of the antenna common unit 4 2 and outputs downlink transmission information described later
  • the control section 29 provided in the base station control station 20 includes a base station selection section 25, a base station synthesis section 26 and a communication link 22-c, and a radio link.
  • the control unit 34-c provided in the radio base station 30-c via the transmitting unit 32- C and the receiving unit 33-c provided in the base station 30-c.
  • it performs channel control and call setting necessary for providing a communication service to the mobile station 40.
  • control unit 34-c mutually exchanges a frame with the mobile station 40 via the transmitting unit 32-c, the receiving unit 33-c, the antenna sharing unit 35-c, and the antenna 36-c. (4) By transmitting and receiving predetermined information in slot units, processing suitable for the above-described channel control and call setting is performed.
  • control unit 45 provided in the mobile station 40 communicates with the wireless base station 3 O-c via the reception unit 43, the transmission unit 44, the antenna sharing unit 42, and the antenna 41.
  • the communication service described above is realized by transmitting and receiving the above-mentioned predetermined information.
  • the control unit 29 is a mobile station capable of performing soft handoff based on the above-described channel control and call setup procedures (hereinafter, for simplicity, the mobile station 40 ) And all the radio base stations that form a radio zone with good transmission quality at the location where the mobile station 40 is located (hereinafter, for simplicity, irrespective of singular or multiple , And the sign “30-v” is given.)) And is managed.
  • the control information generation unit 24 is configured to transmit not only downlink transmission information to be transmitted to the mobile station 40 (such as a speech signal given from the mobile switching center) but also an ARQ frame generated by the ARQ generation unit 23 as described later. Is converted to a sequence of frames in the specified format.
  • the base station selection unit 25 includes a communication link 22 that is laid between the radio base stations 30-V identified by the control unit 29 among the radio base stations 30-1 to 30-n. Such a sequence of frames is transmitted in parallel to the wireless base station 30- V via -V .
  • the transmission unit 32 -V In the radio base station 3 O-v, the transmission unit 32 -V generates a downlink radio frequency signal modulated by these frames under the control of the control unit 34 -V, and the antenna sharing unit 35 -V Transmit the radio frequency signal to mobile station 40 via v and antenna 36-v.
  • the receiving unit 43 restores the above-described downlink transmission information by rake combining and demodulating the radio frequency signals arriving in parallel from the radio base station 30-v.
  • the transmitting unit 44 includes a terminal to communicate with the mobile station 40, a control unit 34-V provided in the radio base station 30-V, and a base station control station 20.
  • Specified frame indicating uplink transmission information to be transmitted to any of the specified control units 29 here, for simplicity, a CRC (Cyclic Redundancy Check) code that can be used for evaluation of normality and transmission quality)
  • CRC Cyclic Redundancy Check
  • the receiving unit 33-V receives the uplink radio frequency signal arriving at the antenna 36-v via the antenna sharing unit 35-V, and demodulates the uplink signal. Restore the sequence of frames indicating the transmission information, and evaluate the transmission quality of the frames.
  • the receiving unit 33-V determines whether or not the sequence of the frame should be given to the control unit 34. If the result of the determination is false, the communication link 22-v is set. This sequence of frames is transmitted to the base station controller 20 via the base station.
  • the selective combining section 26 is received via the communication link 22 -V laid between the base station 30 -V identified by the control section 29.
  • Fret Of the best transmission quality here, for simplicity, included in each frame
  • the control information terminating unit 27 determines whether or not the uplink transmission information configured as such a sequence of frames is information relating to channel control and call setup, and if the result of the determination is true, Then, the upstream transmission information is delivered to the control unit 29, and if the result of this determination is false, it is delivered to the mobile exchange via the ARQ termination unit 28.
  • control unit 29 monitors the transmission quality of the sequence of these frames (here, for simplicity, it is assumed to be evaluated as the reciprocal of the frame error rate) at a predetermined frequency, and monitors the transmission quality. If is smaller than the predetermined threshold, the control information generating unit 24 is notified of this.
  • the terminal 40 sends these radio base stations 30 O to the radio base station 30 _v via the base station selection unit 25 and the communication link 22 -v. Requests an update of the lower limit of transmission quality to be maintained under the transmission power control of the upstream radio transmission path up to -v.
  • control information generation unit 24 sends the mobile station 40 to the radio base station 30-V via the base station selection unit 25 and the communication link 22-v during the period in which there is no downlink transmission information. Instructs to stop transmission related to the assigned wireless channel.
  • the control unit 34-V arrives at the antenna 36-v from the mobile station 40 and receives it via the antenna sharing unit 35-v and the receiving unit 33-v.
  • the level of the obtained uplink radio frequency signal is measured at a predetermined frequency, and a deviation of the level from a predetermined target value (set as a value adapted to the “lower limit of transmission quality” described above) is identified.
  • control unit 34-V notifies the mobile station 40 of this deviation with a predetermined accuracy via the transmitting unit 32-v, the antenna sharing unit 35_v, and the antenna 36-V. Accordingly, the mobile station 40 requests that the transmission power to be transmitted by the mobile station 40 in units of frames be corrected and maintained at an appropriate value.
  • the control unit 29 receives the signal received via the selective combining unit 26.
  • the frame and the identification information of the mobile station 40 corresponding to the transmission source of this frame are provided to the ARQ generation unit 23.
  • the ARQ generation unit 23 generates an ARQ (Auto repeat request) frame of a predetermined format based on the frame and the identification information, and sets the control information generation unit 24, the base station selection unit 25, and the communication link 22-V. This ARQ frame is transmitted to the wireless base station 30_v via the terminal.
  • ARQ Auto repeat request
  • the ARQ terminating unit 28 detects the ARQ response frame returned from the mobile station 40 in response to the ARQ frame, and delivers the ARQ response frame to the control unit 29.
  • control unit 29 When the control unit 29 identifies the ARQ response frame, the control unit 29 transmits the ARQ response frame to the mobile switching center via 11 (3 terminal unit 28).
  • the mobile station 40 performs the dipersistency reception based on the rake combining described above for the downlink of the radio transmission path whose transmission characteristics can be widely and rapidly fluctuated, and performs the uplink transmission of the radio transmission path.
  • the base station control station 20 by performing selective combining in the base station control station 20, it is possible to perform soft handover without instantaneous interruption of the communication path, and to maintain high transmission quality under the retransmission control described above. Can be done.
  • the transmission power control The transmission quality of the specific radio transmission path used for transmission of the frame with the highest transmission quality among the radio transmission paths individually formed between the radio base station 30-v and the mobile station 40 is the default. Is performed so as to be maintained at or above the lower limit value of.
  • the transmission quality of a wireless transmission path whose transmission quality is less than this lower limit is further deteriorated, and this wireless transmission path hardly contributes to the improvement of the transmission quality based on the rake combining performed by the mobile station 40. Even if they do, they will continue to be maintained.
  • a radio frequency signal transmitted unnecessarily to maintain such a radio transmission path causes interference or obstruction to other radio transmission paths formed in parallel, and also generates a signal per unit frequency.
  • the number of subscribers that can be accommodated is a factor that reduces overall Was.
  • the radio resources are unnecessarily and redundantly allocated to a single mobile station 40, so that the subscription that can be accommodated per unit frequency is performed. It was highly likely that the number of people would decrease overall.
  • the present invention evaluates the transmission quality of a downlink on a wireless transmission path at low cost and with high accuracy without changing the basic configuration, and accurately reduces wireless resources based on the transmission quality. It is an object of the present invention to provide a transmission quality measurement device, a channel control device, and a radio base station that can perform transmission and reception.
  • Another object of the present invention is to achieve a channel control and other processes that are inexpensive and highly accurate and adapt to the downlink transmission quality without changing the basic configuration.
  • an object of the present invention is to be able to accommodate radio signals per unit frequency at low cost and with high accuracy without changing the basic configuration and significantly deteriorating the transmission quality. The point is that the number of subscribers can be increased.
  • an object of the present invention is to maintain high overall transmission quality and service quality, and to efficiently utilize radio resources.
  • Another object of the present invention is to reduce the amount of processing and power consumption. Further, it is an object of the present invention to improve the price / performance ratio, transmission quality and service quality of a wireless transmission system as a whole and to maintain them at a high level, and to achieve effective use of radio frequencies.
  • the above-mentioned object is to provide a single wireless transmission path formed with a wireless station in a single wireless zone in a wireless zone in which a diversity receiving wireless station is located. Transmission of the specific message to be performed and the suspension of the transmission on the radio transmission path formed in parallel with the radio station via the radio zone other than the single radio zone, in parallel and repeatedly.
  • a transmission quality measuring device characterized in that the transmission quality of the downlink of a single radio transmission path is determined as a ratio of reception of the response of the radio station to the message, and the transmission quality determined in this manner.
  • a channel control device characterized in that a downlink of a single wireless transmission line is excluded from transmission when the value of falls below a prescribed threshold value.
  • a channel control apparatus transmission to a downlink of a radio transmission path whose transmission quality of a downlink is lower than the above-described threshold among a plurality of radio transmission paths to be subjected to diversity reception is performed by channel control. Regulations will be regulated without significant changes.
  • the above-mentioned object is to transmit a signal to a single radio channel formed between the radio station and a radio station through a single radio zone among radio zones in which a radio station performing diversity reception is located. Stop, or gradually reduce the transmission power at which the transmission is performed, and at the time when the transmission power of the downlink is identified as insufficient under the transmission power control, Alternatively, a transmission quality measuring device characterized in that the transmission quality of the downlink is determined as the presence or absence of the identification, and a single wireless communication is performed when the transmission quality thus determined falls below a specified threshold. This is achieved by a channel control device that is characterized in that the downlink of the transmission path is excluded from transmission targets.
  • a channel control apparatus transmission to a downlink of a radio transmission path whose transmission quality of a downlink is lower than the above-described threshold among a plurality of radio transmission paths to be subjected to diversity reception is performed by channel control. It is regulated without major changes in the transmission power control procedure.
  • the above-described object is to provide a radio station that diversity-receives a radio signal from a radio base station and a radio signal from another base station different from the radio base station based on a reception status of a signal in response to a specific message.
  • a radio base station characterized in that transmission to its own radio station is temporarily stopped and a pause is provided in the diversity reception state. That is, among a plurality of wireless transmission paths to be subjected to diversity reception, transmission to a downlink of the wireless transmission path in which the above-mentioned reception condition is satisfied is regulated without a significant change in the channel control procedure.
  • the above-described object is to provide a radio signal from a radio base station and a radio signal from another radio base station different from the radio base station in a diversity manner to obtain an increase in transmission power of a downlink radio signal from a radio station.
  • a radio base station characterized by being able to temporarily stop transmission of its own station to that radio station or control to reduce transmission power without increasing transmission power when there is reception. Is done.
  • channel control and transmission control are performed for downlink links of the wireless transmission path whose downlink transmission quality has deteriorated to such an extent that the above-mentioned signals are received.
  • Transmission can be regulated or transmission power can be reduced without significant changes to power control procedures.
  • the control means includes a single radio zone formed between the radio station and the radio station in the radio zone where the diversity receiving radio station is located. Transmission of a specific message to the wireless transmission path of the current wireless transmission path and suspension of transmission to a wireless transmission path formed in parallel with the wireless station through a wireless zone other than the single wireless zone. Iterate in parallel.
  • the transmission quality obtaining means obtains the downlink transmission quality of a single radio transmission line as a ratio of the response of the radio station to the specific message received.
  • the transmission quality of the downlink of each wireless transmission path subject to diversity reception is required to be highly accurate without significant changes in channel control procedures and significant deterioration in overall transmission quality.
  • channel control and other processes adapted to the transmission quality of the downlink with high accuracy and low cost can be achieved without changing the basic configuration.
  • the control means is formed between the wireless station through a single wireless zone and a wireless station in which the wireless station performing the diversity reception is located. Either stop transmission on a single wireless transmission path, or gradually reduce the transmission power at which the transmission is performed.
  • Transmission quality acquisition means is a single wireless transmission The transmission power at the time when it is determined that the transmission power of the downlink is insufficient under the transmission power control for the downlink of the road, or as the presence or absence of the identification, Find transmission quality.
  • the transmission quality of the downlink of each wireless transmission path subject to diversity reception can be improved without significant changes in the channel control and transmission power control procedures and without significant deterioration in overall transmission quality. , High accuracy is required.
  • the control means includes a single radio zone formed between the radio station performing diversity reception and a radio station in a single radio zone. Transmission of a specific message to one radio transmission path and suspension of transmission to a radio transmission path formed in parallel with the radio station via a radio zone other than this single radio zone are concurrently performed. And repeat.
  • the transmission quality obtaining means obtains the downlink transmission quality of a single radio transmission line as a ratio of the response of the radio station to the specific message received. When the transmission quality falls below a prescribed threshold, the transmission control unit excludes a downlink on a single wireless transmission path from transmission targets.
  • the channel control procedure for transmission on the downlink of a wireless transmission path whose transmission quality of the downlink is below the above-mentioned threshold is significantly changed. It is regulated without being.
  • the control means includes a single wireless zone formed between the wireless station and the wireless station through a single wireless zone in a wireless zone in which diversity reception is performed.
  • the transmission to one wireless transmission path is stopped, or the transmission power at which the transmission is performed is gradually reduced.
  • the transmission quality acquisition means is configured to control the transmission power of the downlink under the transmission power control for the downlink of the single wireless transmission path.
  • the transmission quality at the time when the transmission power is determined to be insufficient or the transmission quality of the downlink is determined as the presence or absence of the identification.
  • the transmission control means excludes a downlink on a single wireless transmission path from transmission targets.
  • transmission on a downlink of a radio transmission path in which the transmission quality of the downlink is lower than the above-described threshold requires channel control and transmission power control procedures. Regulated without significant changes. Therefore, there is a change in the basic configuration and a significant deterioration in transmission quality as compared to the conventional example in which transmission over individual wireless transmission paths is not regulated at all regardless of such transmission quality.
  • the number of subscribers that can be accommodated per unit frequency can be increased at low cost and with high accuracy while reducing radio resources.
  • the control means repeats transmission of a specific message to a single wireless transmission line excluded from transmission targets at a predetermined frequency.
  • the transmission control means sets a single radio transmission path downlink as a transmission target.
  • the control means is formed between any of the radio zones where the radio station is located and the radio station, and the transmission quality of the uplink is specified. Select a wireless transmission path below the lower limit as a single wireless transmission path.
  • a single wireless transmission channel whose transmission on the downlink can be stopped or suspended is selected with high accuracy based on the reversibility of characteristics between the uplink and the downlink of the wireless transmission channel.
  • control means operates during a period in which the wireless station can perform soft handover.
  • the transmission quality of the downlink of the single wireless transmission path described above is determined by performing a soft handover by a wireless station in which another wireless transmission path is formed in parallel with the single wireless transmission path. It is monitored only for a period of time when it can.
  • the processing amount and power consumption can be reduced as compared with the case where the transmission quality is constantly monitored.
  • the transmitting means transmits at least a specific message.
  • Transmission stop means is provided for a wireless station that diversity-receives a wireless signal from a wireless base station and a wireless signal from another base station different from the wireless base station, based on the reception status of a signal in response to a specific message. Temporarily stop the transmission to the radio station, and provide a pause in the diversity reception status.
  • the transmission power control means increases the transmission power according to a signal for requesting an increase in the transmission power.
  • the transmission stop means receives the signal requesting an increase in the transmission power of the downlink radio signal from the radio station that diversity-receives the radio signal from the radio base station and the radio signal from another base station different from the radio base station. In such a case, it is possible to temporarily stop transmission to the wireless station of the own station or control to reduce the transmission power without increasing the transmission power.
  • channel control and transmission are performed on the downlink links of the wireless transmission paths whose downlink transmission quality is reduced to such an extent that the above-mentioned signals are received.
  • Power control procedures will not be significantly changed Transmission may be regulated, or transmission power may be reduced.
  • FIG. 1 is a diagram showing a first or second embodiment of the present invention.
  • FIG. 2 is a diagram illustrating the operation of the first and second embodiments of the present invention.
  • FIG. 3 is an operation flowchart of the first embodiment of the present invention.
  • FIG. 4 is an operation flowchart of the second embodiment of the present invention.
  • FIG. 5 is a diagram showing a configuration example of a mobile communication system in which soft handover is performed.
  • FIG. 1 is a diagram showing first and second embodiments of the present invention.
  • the base station control station 20 is configured by including the selection combining section 11 and the control section 12 in place of the selection combining section 26 and the control section 29, respectively.
  • FIG. 2 is a diagram illustrating the operation of the first and second embodiments of the present invention.
  • FIG. 3 is an operation flowchart of the first embodiment of the present invention.
  • the selection combining section 11 provided in the base station control station 20 reads “the radio base station 30 -V via the communication link 22 -V”. Monitor the transmission quality of frames individually received from the
  • the control unit 12 performs the following processing.
  • radio base station 30 -v a single specific radio base station (the transmission source of a frame whose transmission quality monitored by the selection / combination unit 11 is lower than the predetermined lower limit first) Less than Below, it is called "specific radio base station”. ) And a radio base station other than the specific radio base station
  • non-specific radio base station j. (Hereinafter referred to as “non-specific radio base station j.”) (Fig. 3 (1)).
  • ARQ generation unit 23 control information generation unit 24, base station selection unit 25, and communication link 22.
  • a "transmission stop request” meaning "transmission on the downlink of the wireless transmission path formed with the mobile station 40 should be stopped only for a predetermined period ⁇ "
  • the above-mentioned “ARQ frame” is transmitted at a predetermined cycle (> ⁇ ) and a predetermined number of times ((FIG. 2 (1), FIG. 3 ()).
  • the transmission unit 32- ⁇ provided in the specific radio base station transmits a downlink radio frequency signal modulated with the “ARQ frame” to the mobile station 40 every time the “ARQ frame” is identified ( Figure 2 ( 2 )).
  • the transmission unit 32 -v provided in the non-specific radio base station performs transmission on the downlink over the above-mentioned predetermined period ⁇ . Stop (Fig. 2 (3)).
  • the receiving unit 33-V identifies the “ARQ response frame” received from the mobile station 40 according to the “ARQ frame” described above (FIG. 2 (4)), and communicates via the communication link 22-V. Then, the “ARQ response frame” is delivered to the base station control station 20 (FIG. 2 (5)). Note that the mobile station 40 transmits the above-described “ARQ response frame” in addition to the retransmission of the frame indicated by the “ARQ frame” described above, and the radio base station 3 Ov ARQ response frame ”to the base station controller 20.
  • the control unit 12 sets the ratio of the total number P of “ARQ response frames” delivered in this way to the total number N of “ARQ frames” described above to a predetermined lower limit value X.
  • a determination is made as to whether the transmission rate is below the threshold (hereinafter referred to as “transmission restriction determination”) (Fig. 2 (6) and Fig. 3 ( 3 )). If the result of the transmission restriction determination is false, The process (Fig. 3 (1) to (3)) is repeated.
  • control unit 12 sends the control information to the specific radio base station via the control information generation unit 24, the base station selection unit 25, and the communication link 22-V.
  • the request is transmitted (Fig. 2 (7), Fig. 3 (4)).
  • the specific radio base station suspends transmission on the corresponding downlink according to the “transmission restriction request” (Fig. 2 (8)).
  • control unit 12 provided in the base station control station 20 performs the following only for a period during which the channel control relating to the mobile station 40 should be continued. Is performed.
  • the contribution to the improvement of the transmission quality based on the rake combining performed by the mobile station 40 is made.
  • transmission by the corresponding wireless base station is restricted.
  • the basic configuration of the base station control station 20, the radio base stations 30 -1 to 30 -n and the mobile station 40 is compared with the conventional example in which such transmission is not restricted at all.
  • the number of subscribers that can be accommodated per unit frequency is increasing at the same time as reducing and effectively reusing wireless resources at low cost and with high accuracy, without accompanying changes in transmission and significant deterioration in transmission quality.
  • the “ARQ frame” is properly identified by the radio base station 30 -v and the mobile station 40, and is used as a trigger for transmitting a message that replaces the “ARQ response frame” described above.
  • the message may be replaced by any other message (for example, information arranged in an extra field ⁇ bit of a message to be transmitted in the course of the channel control).
  • the suspension of transmission on the downlink described above is realized by physically suspending the transmission on the downlink.
  • the transmission unit 32 performs transmission only when downlink transmission information is given, transmission is stopped via this downlink.
  • the delivery of the downlink transmission information to be performed may be realized by being postponed by the base station control station 20 (base station selection unit 25).
  • transmission on the downlink is resumed when the above-mentioned ratio continuously monitored for the downlink exceeds the predetermined lower limit even after the transmission is withdrawn.
  • FIG. 4 is an operation flowchart of the second embodiment of the present invention.
  • the feature of the present embodiment is that the above-mentioned “transmission restriction determination” is performed based on the following procedure.
  • the selection / combination unit 11 provided in the base station control station 20 reads, ⁇ the radio base station 30 -V via the communication link 22 -V ''. Monitor the transmission quality of frames individually received from the
  • the control unit 12 performs the following processing.
  • radio base station a single specific radio base station (the transmission source of a frame whose transmission quality monitored by the selection / combination unit 11 is lower than the predetermined lower limit first)
  • specific radio base station. the transmission source of a frame whose transmission quality monitored by the selection / combination unit 11 is lower than the predetermined lower limit first
  • the control information generation unit 24, the base station selection unit 25, and the communication link 22-V described above indicate that the ⁇ specific radio base station '' Stepwise reducing the “transmission power that should be transmitted to the downlink of the wireless transmission path” ”for a specified number of times at a predetermined period (> ⁇ ). Anti And send it again (Fig. 4 ( 2 )).
  • the receiving unit 43 measures the level of the received wave received via the downlink whose transmission power has been reduced in this way.
  • the control unit 45 determines whether or not the level of the received wave is lower than a predetermined threshold value (set under transmission power control) (hereinafter, referred to as “level determination”). The result of the level determination is notified to the wireless base station 30-v via the. The radio base station 30-V passes the result of such a level determination to the base station control station 20 over the communication link 22-V.
  • a predetermined threshold value set under transmission power control
  • control unit 12 performs the following processing.
  • the mobile station 40 and the radio base station 30-1 to 30-n are used by utilizing the existing transmission power control function. Are identified without change.
  • the level of the received wave to be subjected to the level determination described above is reported by the mobile station 40 to the radio base station 30-v without any message specific to the mobile station 40 being delivered.
  • the suspension of transmission on the downlink is performed only by the above-described specific radio base station.
  • the present invention is not limited to such a configuration.
  • transmission is similarly performed on a downlink of a radio channel in which the uplink transmission quality is lower than a predetermined lower limit. Is effectively utilized Further reduction of the radio resources that have not been performed may be achieved.
  • a downlink of a wireless transmission path formed in parallel with the mobile station 40 is set. Among them, transmissions on downlinks whose transmission quality has fallen below a predetermined lower limit have been postponed.
  • the present invention is not limited to such a configuration.
  • channel control can be performed. It is applicable even if soft handover is not possible below.
  • the present invention provides a base station control station 20 and a plurality of radio base stations 30-1 to 30-n installed under the base station control station 20.
  • a mobile communication system including a mobile station 40 that can be located at a point where a plurality of wireless zones overlap, of the wireless zone formed by these wireless base stations 30-1 to 30-n.
  • the present invention is not limited to such a configuration.
  • the present invention is configured such that one or a plurality of radio base stations are combined with a base station control station, or any functional field equivalent to the above-described process is performed.
  • wireless communication systems (including mobile communication systems) realized under load sharing.
  • the base station control station 20 is connected only to the public telephone network via the inter-station link 21 and the mobile switching system.
  • the present invention is not limited to such a configuration.
  • the base station control station 20 is connected to the above-mentioned public telephone network.
  • the Internet or other data communication network not limited to a communication network to which the message exchange method or the store-and-forward method is applied
  • the above-mentioned downlink is SCH (Supplemental Channel) instead of FCH (Fundamental Channel), which is sometimes used for transmitting voice communication signals, and / or DDCH (Dedicated Control Channel), which is used for signaling and power control Downlink link.
  • SCH Singlemental Channel
  • FCH Freundamental Channel
  • DDCH Dedicated Control Channel
  • the wireless transmission line for which it has become difficult to ensure a predetermined transmission quality according to the movement and position of the mobile station 40 is, for example, an uplink and a downlink. When both of the transmission qualities fall below a predetermined lower limit, they may be released as appropriate.
  • the present invention is applied to a mobile communication system to which a narrowband CDMA system is applied.
  • the present invention is not limited to such a mobile communication system, and the mobile station performs the diversity reception of downlink radio frequency signals arriving in parallel from a plurality of radio stations, and the mobile station transmits the radio frequency signals to these radio base stations. If a single RF signal with the highest transmission quality is selected and received from the upstream RF signals arriving in parallel to the station, any multiple access method, modulation and demodulation method, channel arrangement, zone The present invention is also applicable to a wireless transmission system to which the configuration and the frequency arrangement are applied.
  • the transmission of a link under a desired wireless transmission path can be performed at low cost and with high accuracy without changing the basic configuration.
  • Channel control and other processes adapted to quality are achieved.
  • the first and second channel control devices and the first and second radio base stations according to the present invention involve changes in the basic configuration and significant deterioration in transmission quality as compared with the conventional example.
  • the number of subscribers that can be accommodated per unit frequency can be increased inexpensively and accurately with the reduction of radio resources.
  • the radio resources are effectively used, and the running cost is reduced, and the interference and the interference caused by the use of the unnecessary radio resources are avoided.
  • the overall transmission quality and service quality are maintained at a high level, and the radio resources are used efficiently. Further, in the fifth channel control device according to the present invention, the processing amount and the power consumption are reduced. Power is reduced.
  • the price-performance ratio, the transmission quality and the service quality are comprehensively improved and maintained high, and the effective use of the wireless frequency is achieved.

Abstract

L'invention concerne un dispositif de mesure de qualité de transmission permettant de mesurer la qualité d'une transmission de liaison descendante allant d'une station radio de base voulue à une station radio dans un système de radiocommunication, un dispositif de commande de canal permettant de créer un chemin de transmission radio de liaison descendante et une station radio de base. La qualité de transmission de liaison descendante est évaluée de manière précise à faible coût et selon la qualité de transmission, la ressource radio est réduite. La présente invention comprend: un moyen de commande destiné à répéter en transmission parallèle un message particulier dans un chemin de transmission radio unique formé dans une seule zone radio vers une station radio et à stopper la transmission dans le chemin de transmission radio formé en parallèle à la station radio via une zone radio différente de la zone radio unique, et un moyen d'acquisition de qualité de transmission destiné à calculer la qualité de transmission de liaison descendante d'un seul chemin de transmission radio sous la forme d'un rapport de réponse de station radio reçu pour le message particulier.
PCT/JP2003/009440 2003-07-25 2003-07-25 Dispositif de mesure de qualite de transmission, dispositif de commande de canal et station radio de base WO2005011152A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2003/009440 WO2005011152A1 (fr) 2003-07-25 2003-07-25 Dispositif de mesure de qualite de transmission, dispositif de commande de canal et station radio de base
JP2005504571A JPWO2005011152A1 (ja) 2003-07-25 2003-07-25 伝送品質計測装置、チャネル制御装置および無線基地局

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/009440 WO2005011152A1 (fr) 2003-07-25 2003-07-25 Dispositif de mesure de qualite de transmission, dispositif de commande de canal et station radio de base

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WO2005011152A1 true WO2005011152A1 (fr) 2005-02-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102027796A (zh) * 2008-05-16 2011-04-20 皇家飞利浦电子股份有限公司 用于在电信系统中分配传输资源的方法
US8750244B2 (en) 2009-09-15 2014-06-10 Fujitsu Limited Wireless terminal, wireless base station and communication method in wireless communication system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002009741A (ja) * 2000-06-26 2002-01-11 Ntt Docomo Inc 自動再送要求を行う通信方法及び基地局装置
JP2002232353A (ja) * 2001-01-30 2002-08-16 Ntt Docomo Inc 移動通信システム及び送信電力制御方法、並びに移動局装置及びその受信信号処理方法
JP2003234697A (ja) * 2002-02-12 2003-08-22 Nec Corp 品質しきい値設定方法及びそれを用いた通信制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002009741A (ja) * 2000-06-26 2002-01-11 Ntt Docomo Inc 自動再送要求を行う通信方法及び基地局装置
JP2002232353A (ja) * 2001-01-30 2002-08-16 Ntt Docomo Inc 移動通信システム及び送信電力制御方法、並びに移動局装置及びその受信信号処理方法
JP2003234697A (ja) * 2002-02-12 2003-08-22 Nec Corp 品質しきい値設定方法及びそれを用いた通信制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102027796A (zh) * 2008-05-16 2011-04-20 皇家飞利浦电子股份有限公司 用于在电信系统中分配传输资源的方法
CN102027796B (zh) * 2008-05-16 2013-12-25 皇家飞利浦电子股份有限公司 用于在电信系统中分配传输资源的方法
US8750244B2 (en) 2009-09-15 2014-06-10 Fujitsu Limited Wireless terminal, wireless base station and communication method in wireless communication system

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