JP2007082259A - Radio access system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a subscriber from waiting over a long time, until communication is started each time power is activated by enabling a subscriber to perform initial setting after the power activation, at the subscriber's radio station. <P>SOLUTION: An initial setting control unit 653 is provided for an IDU 60 of the subscriber's radio station 20B. The initial setting control unit 653 determines whether previous data are applicable to a new communication, by referring to the previous data stored in an initial setting data storage part 652; sets the previous data, as they are, when they are applicable; activates an initial set part 651, when they are not applicable; and performs control so as to execute initial setting of the data acquired by a normal search/collation routine in an initialization part 61. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio access system comprising a base station connected to a communication network and a plurality of subscriber radio stations which are arranged in a radio zone of the base station and perform one-to-many radio communication with the base station. More specifically, the present invention relates to initial setting control of communication parameters when power is turned on in a subscriber radio station.

  For example, as a system configuration for accessing a communication carrier's communication network from a subscriber terminal and using a communication service, a plurality of subscriptions are made in a wireless zone of a base station connected to a communication carrier's switching center. A subscriber station connected to the subscriber radio station by providing a radio section in which a subscriber radio station is arranged to perform one-to-many, that is, point-to-multipoint (PTMP) communication between the base station and each subscriber radio station There is known a wireless communication system that enables wireless access to a communication network of a communication carrier.

  In this type of system, the base station recognizes the operating state of the subscriber radio station and notifies the result to the network management apparatus (NMS) via the communication network, so that the operating state of the radio base station is determined in the NMS. It can be monitored.

  As a matter of course, the monitoring item of the operation state of the subscriber radio station includes power-off of the subscriber radio station.

  Here, assuming that the subscriber radio station is used in a general home, the subscriber may frequently turn on / off the power of the subscriber radio station. In such a case, the subscriber radio station may There are two types of factors (power-off) due to a failure of a subscriber radio station and those due to a power-off operation performed by the subscriber.

  In this type of conventional system, the base station does not distinguish between the above-mentioned two factors regarding the power-off of the subscriber radio station, and both of them notify the NMS of the power-off.

  For this reason, in the conventional system, when a power failure alarm for a subscriber radio station is generated in the NMS, it cannot be distinguished whether this alarm is due to a failure of the subscriber radio station or a power failure operation of the subscriber. An error inquiry was made to the subscriber's home that had a power-off alarm.

  In Patent Document 1 listed below, various devices such as computer devices are connected by a local area network (LAN), and each device broadcasts a message indicating power failure and the cause thereof to the LAN. A system for holding a message broadcasted from a plurality of devices is disclosed.

  On the other hand, in a subscriber radio station of this type of system, when the power is turned on (power is turned on), a plurality of communication parameters that enable communication with the base station with the opposite base station Has a function of starting the communication by opening a line with the base station after the initial setting is completed.

  With regard to such a function, this type of conventional subscriber radio station is configured to repeatedly perform initial setting from the first initial setting item to the final initial setting item every time the power is turned on. It took a long time (about 5 minutes depending on the model) to start communication with the base station after being turned on.

In particular, as described above, in a usage environment in which a subscriber radio station is used in an ordinary home and the power supply is likely to be frequently turned on / off, each time the power is turned on, it takes a long time to start communication. It was a long wait and it was very troublesome in operation.
CD-ROM of Japanese Utility Model No. 5-4709 (Japanese Utility Model Application No. 6-66151)

  As described above, in the conventional system, the subscriber radio station is configured to perform initial setting in order from the beginning for a plurality of initial setting items every time the power is turned on, so that the initial setting time is long, Especially in subscriber radio stations that are used in ordinary homes and have a high possibility that subscribers frequently turn on and off, every time they are turned on, they wait for a long time before starting communication, and operate smoothly. There was a problem that was disturbed.

  The present invention eliminates the above-described problems, and in a subscriber radio station, the initial setting after power-on can be performed in a short time, and even in a subscriber radio station that is likely to be frequently turned on / off, It is an object of the present invention to provide a wireless access system that can be smoothly operated without waiting for a long time before starting communication every time power is turned on.

  In order to achieve the above object, the invention according to claim 1 is a base station connected to a communication network, and a plurality of one-to-many wireless communications arranged in the radio zone of the base station. In the radio access system comprising the subscriber radio stations, the subscriber radio station sequentially obtains and initializes various communication parameter data necessary for communication with the base station through a search / verification routine; , Storage means for storing the initially set data, and after turning on the power, refer to the previous initial setting data stored in the storage means to determine whether it can be applied to the current communication, and can be applied In this case, the previous initial setting data is set as it is. If the initial setting data is not applicable, the initial setting means is activated to initialize the data acquired by the search / collation routine. Characterized by comprising a means.

  The invention according to claim 2 is the invention according to claim 1, wherein the subscriber radio station is composed of an indoor device installed indoors and an outdoor device installed outdoors, the initial setting means, The storage means and the initial setting control means are provided in the indoor device.

  According to the present invention, the subscriber radio station is provided with means for storing the previous initial setting data, and whether or not it can be applied to the current communication with reference to the previous initial setting data stored after the power is turned on. If it can be applied, the previous initial setting data is set as it is, and if it is not applicable, the data acquired through the normal search / collation routine is initialized. When applicable, the normal search / collation routine can be omitted, and the initial setting time can be shortened. In particular, for subscriber radio stations that are installed in ordinary homes and the installation environment does not change, the initial setting can be completed in a short time after the power is turned on and communication can be started. Operation is possible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram for explaining the overall configuration of a radio access system according to the present invention.

  In FIG. 1, an antenna 11 is provided in a base station 10 connected to an existing public network 81 via a wired or wireless communication line 80, and communication is possible through the base station 10. Inside a certain zone 1, a plurality of subscriber radio stations 20 are installed. As shown in FIG. 1, each subscriber radio station 20 has a different distance from the base station 10 depending on the installation location.

  Within the zone 1, between the base station 10 and each subscriber radio station 20, there are an uplink (from the subscriber radio station 20 to the base station 10) and a downlink (from the base station 10 to the subscriber radio station 20). ) Is set, and point-to-multipoint (PTMP) communication between the base station 10 and each subscriber radio station 20 is performed using these two lines.

  In this system (PTMP system), the base station 10 is connected to a network management apparatus (NMS) 90 via a communication line 80 and a public network 81.

  The network management device 90 monitors and controls the operation of each zone by performing data transmission with the base station 10 and the subscriber radio station 20 in the zone 1 via the communication line 80 and the public network 81. is there.

  Further, the public network 81 is connected to a communication network such as an ATM network 82, an I-private network 83, a communication network 84 such as the Internet or an intranet, a frame relay network 85, and an N-ISDN 86.

  At least one of these networks is provided with a switching center (not shown) of a telecommunications carrier, and the switching center provides a service system of the telecommunications carrier (various communications operated by the telecommunications carrier). Connected to the system that manages the data corresponding to the service).

  A subscriber to the communication service operated by the communication carrier uses the communication service by accessing the service system of the communication carrier from the subscriber terminal 70 described later via the subscriber radio station 20. Can do.

  In FIG. 1, only one base station 10 and a subscriber radio station 20 arranged in the zone 1 of the base station 10 are disclosed. However, in an actual system configuration, the same mode (one There are a plurality of zones including the base station 10 and a plurality of subscriber radio stations 20 performing PTMP communication, and these zones cover the entire area where the communication service described above can be provided.

  FIG. 2 is a conceptual diagram showing a schematic configuration and arrangement of the base station 10 and the subscriber radio station 20 in the system of FIG.

  In FIG. 2, a base station 10 is connected to an antenna 11 as a first unit, an outdoor unit (OUTDOOR UNIT: hereinafter referred to as ODU) 12 that is connected to the antenna 11 and is installed outside the building. The unit includes an indoor unit (INDOOR UNIT: hereinafter referred to as IDU) 13 installed in the same building as the unit, and a coaxial cable 14 as a connection line between the ODU 12 and the IDU 13.

  On the other hand, the subscriber radio station 20 includes an antenna 30, an outdoor unit (hereinafter referred to as ODU) 40 that is connected to the antenna 30 as a first unit, and is installed outside the subscriber's house, and a coaxial cable 50 as a connection line. , And an indoor unit (hereinafter referred to as IDU) 60 installed in the subscriber's house as a second unit.

  In the following description regarding the operation of the subscriber radio station 20, for convenience, a signal in the direction of the antenna 30 → ODU 40 → coaxial cable 50 → IDU 60 is a received signal (downstream signal), and conversely, the IDU 60 → coaxial cable 50 → A signal in the direction of ODU 40 → antenna 30 will be described as a transmission signal (uplink signal).

  In the subscriber radio station 20, the antenna 30 is installed after adjusting the direction so as to face the antenna 11 of the base station 10 so that radio signals can be transmitted to and received from the base station 10. .

  The ODU 40 connected to the antenna 30 converts a radio frequency signal transmitted and received by the antenna 30 into an IF signal that is an intermediate frequency signal, and is usually integrally formed with the antenna 30 in many cases. The antenna 30 and the ODU 40 are installed, for example, by standing a pole on the rooftop of a building and the like.

  A coaxial cable 50 is connected to the ODU 40 and is connected to an IDU 60 installed indoors via the coaxial cable 50. In the coaxial cable 50, an intermediate frequency band transmission signal (hereinafter referred to as a transmission IF signal) transmitted from the IDU 60 toward the ODU 40, and an intermediate frequency band reception signal (hereinafter referred to as a transmission IF signal) transmitted from the ODU 40 toward the IDU 60 (hereinafter referred to as the transmission signal). Reception IF signal), various control signals, and power supply voltage supplied from the IDU 60 to the ODU 40 are multiplexed and transmitted.

  Further, a subscriber terminal 70 is connected to the IDU 60 via a network such as a LAN so that communication with an existing network (public network 81 or the like) can be performed. As the subscriber terminal 70, a communication terminal device such as a telephone, a PC (personal computer), various 10Base-T terminals, and an ISDN terminal is used. The connection between the IDU 60 and the subscriber terminal 70 may be a direct connection without using a LAN or the like.

  Next, the detailed configuration of the subscriber radio station 20 will be described for each embodiment.

First embodiment:
FIG. 3 is a block diagram showing a detailed configuration of the subscriber radio station 20A according to the first embodiment.

  As described in the description of FIG. 2, the entire subscriber radio station 20 </ b> A includes the ODU 40 to which the antenna 30 is connected and the IDU 60 connected to the ODU 40 via the coaxial cable 50.

  As shown in FIG. 3, the rough configuration of the ODU 40 includes a transmission system, a reception system, and a control unit 41 that controls the entire ODU 40.

  In the ODU 40, the connection end with the antenna 30 is branched and connected to the reception filter 421 and the transmission filter 434. Here, the reception filter 421 has a characteristic of passing a radio frequency band signal for a reception signal and blocking a radio frequency band signal for a transmission signal. On the other hand, the transmission filter 434 has a characteristic of passing a radio frequency band signal for a transmission signal and blocking a radio frequency band signal for a reception signal.

  The reception system through which the reception signal passes is connected from the reception filter 421 to the ODU demultiplexing unit 44 via the reception amplifier 422, the frequency conversion unit 423, and the reception variable attenuation unit (hereinafter referred to as reception ATT) 424. ing.

  On the other hand, the transmission system through which the transmission signal passes is transmitted from the ODU demultiplexing unit 44 through the transmission variable attenuating unit (hereinafter referred to as transmission ATT) 431, the frequency conversion unit 432, and the transmission amplifier 433. A filter 434 is connected. The ODU demultiplexing unit 44 is connected to a terminal for connecting a coaxial cable 50 for connecting to the IDU 60.

  A local oscillation frequency is supplied to the frequency conversion units 423 and 432 from the local oscillator 461 via the hybrid circuit 462.

  Further, a DC / DC converter 45 is connected to the ODU demultiplexing unit 44, and a power supply voltage supplied from the IDU 60 is converted into a desired voltage by a method described later and supplied to each unit in the ODU 40. .

  The ODU 40 is provided with a control signal terminal 46 and is connected to the control unit 41.

  In the ODU 40 according to the present embodiment, a power monitoring unit 47 and a standby power supply 48 are provided between the ODU demultiplexing unit 44 and the control unit 41.

  In the control unit 41, a power-off recognition unit 411, a power-off operation recognition unit 412, and a power-off notification processing unit 413 are provided.

  The power monitoring unit 47 monitors the on / off of the power supplied from the IDU 60 via the coaxial cable 50 and the ODU demultiplexing unit 44 and notifies the power interruption recognition unit 411 of the control unit 41 of the monitoring result.

  The power-off recognition unit 411 recognizes whether the power is on or off (power-off) based on the monitoring result notified from the power monitoring unit 47.

  The power-off operation recognition unit 412 recognizes whether or not a power-off operation has been performed to turn off the power of the subscriber radio station 20A. As an example, in the present embodiment, as will be described later, the subscriber terminal 70 is transmitted from the subscriber terminal 70 when the subscriber radio station 20A is turned off, and transferred via the ODU 60. It recognizes that the power-off operation has been performed based on the power-off operation signal.

  The power-off notification processing unit 413 notifies the power-off operation when the power-off operation recognition unit 412 recognizes that the power-off operation has been performed and the power-off recognition unit 411 recognizes that the power is off. A signal is generated and sent to the base station 10.

  The standby power supply 48 is in the ODU 40 after the control unit 65 of the IDU 60 performs control to stop the power supply from the AC / DC converter 66 to each part of the own IDU 60 and the ODU 40 based on the power-off operation signal from the subscriber terminal 70. Is used as a power supply for operation compensation of the control unit 41 and the transmission system related to the transmission of the power-off operation notification signal.

  Next, the configuration of the IDU 60 will be described.

  In the IDU 60, an IDU demultiplexing unit 61 that separates a transmission IF signal transmitted from the IDU 60 to the ODU 40, a reception IF signal transmitted from the ODU 40 to the IDU 60, and a power supply voltage is connected to a terminal connected to the coaxial cable 50. It is connected.

  The reception system is connected from the IDU demultiplexing unit 61 to the terminal I / F unit 63 via the receiver 621, the A / D converter 622, and the demodulation / error correction decoding unit 623.

  On the other hand, the transmission system is connected to the IDU demultiplexing unit 61 through the terminal I / F unit 63 via the modulation / error correction coding unit 641, the frequency conversion unit 642, and the variable attenuation unit 643.

  The IDU 60 is provided with an external power supply terminal 68 to which an external power supply is connected. An AC / DC converter 66 is connected to the external power supply terminal 68 via a power switch 67.

  The AC / DC converter 66 converts the AC power supply (AC100V in this example) supplied from the external power supply terminal 68 into a direct current when the power switch 67 is in an on state (closed state) to generate a predetermined direct current power supply voltage. Generate.

  This DC power supply voltage is supplied to each part in the IDU 60 and also supplied to the ODU 40 via the IDU demultiplexing part 61 and the coaxial cable 50.

  The control unit 65 controls the entire IDU 60, and the control includes power-off control of the IDU 60. For example, the power-off control of the IDU 60 is performed by switching the power switch 67 from an on state (closed state) to an off state (open state) based on a power-off operation signal given from the subscriber terminal 70 via the terminal I / F unit 63. This is realized by switching to.

  In order to turn on the power of the IDU 60 (turn on the power), a power-on operation signal is given from the subscriber terminal 70 via the terminal I / F unit 63 to turn on the power switch 67 (closed state). In addition, the subscriber can directly operate the power switch 67 to turn it on.

  Next, the basic operation of the subscriber radio station 20A will be described.

  A radio frequency band reception signal received from the base station 10 is input to the reception amplifier 422 via the reception filter 421. The reception amplifier 422 amplifies the signal to a predetermined level.

  Thereafter, the reception signal in the radio frequency band is frequency-converted by the frequency conversion unit 423 into a reception IF signal by mixing with the local oscillation signal output from the local oscillator 461 via the hybrid circuit 462, and the reception ATT 424 Is input.

  Here, the reception ATT 424 is attenuated to a level based on the control from the control unit 41, and the reception gain of the ODU can be adjusted by adjusting this level. The reception IF signal attenuated to a desired level by the reception ATT 424 is input to the ODU demultiplexing unit 44.

  Here, the frequency of the reception IF signal is different from the frequency of the transmission IF signal. For this reason, even if it is multiplexed with the transmission IF signal, it can be separated later. Further, since the power supply voltage transmitted from the IDU 60 is a DC voltage, it can be separated.

  The received IF signal transmitted to the IDU 60 via the coaxial cable 50 is separated by the IDU demultiplexing unit 61 and input to the receiving unit 621. Then, after being converted to a digital signal by the A / D converter 622, the demodulation / error correction decoding unit 623 performs demodulation and decoding of the error correction code.

  The demodulation / error correction decoding unit 623 extracts a TPC (Transmit Power Control) control signal for performing transmission level control from the base station 10 and outputs this TPC control signal to the control unit 65. The demodulated received signal is output to the subscriber terminal 70 connected to the IDU 60 via the terminal I / F unit 63.

  On the other hand, a transmission signal input from the subscriber terminal 70 to the IDU 60 is input to the modulation / error correction encoding unit 641 and subjected to error correction encoding such as a Reed-Solomon code and modulated. The frequency converter 642 converts the frequency into an IF signal for transmission. Here, the transmission IF signal has a frequency band different from that of the reception IF signal, as described above.

  Then, the level is controlled to a level based on a TPC control signal for performing transmission level control transmitted from the base station 10 by the variable attenuating unit 643 and input to the IDU demultiplexing unit 61. Here, it is multiplexed with the power supply voltage and the like and input to the coaxial cable 50.

  The transmission IF signal transmitted to the ODU 40 via the coaxial cable 50 is separated from the power supply voltage and the like by the ODU demultiplexing unit 44 and input to the transmission ATT 431.

  Here, the transmission ATT 431 is attenuated to a level based on the control from the control unit 41, and the transmission gain of the ODU 40 can be adjusted by adjusting this level.

  The transmission IF signal attenuated to a desired level by the transmission ATT 431 is input to the frequency conversion unit 432. The transmission IF signal is mixed with a local signal output from the local oscillator 461 via the hybrid circuit 462 by the frequency converter 432 to be frequency-converted into a radio frequency band signal. After being amplified to a voltage, it is output from the antenna 30 to the base station 10 via the transmission filter 434.

  Next, the power-off operation notification control of the subscriber radio station 20A will be described.

  The subscriber radio station 20A has a function of notifying the base station 10 that the power is turned off by a power-off operation when the power is turned off (power is turned off) by the subscriber.

  First, when trying to turn off the power of the subscriber radio station 20 </ b> A, the subscriber performs a power-off operation at the subscriber terminal 70 connected to the IDU 60.

  With this power-off operation, the subscriber terminal 70 generates a power-off operation signal, and the power-off operation signal is input to the control unit 65 of the IDU 60 via the terminal I / F unit 63.

  When the power-off operation signal is input, the control unit 65 transfers the power-off operation signal to the ODU 40 via the IDU demultiplexing unit 61 and the coaxial cable 50.

  In addition, when the power-off operation signal is input, the control unit 65 switches the power switch 67 to an off state (open state) based on the signal.

  By this switching control, the AC power that has been supplied from the external power supply terminal 68 to the AC / DC converter 66 through the power switch 67 is cut off, and the DC power is supplied from the AC / DC converter 66 to each part in the IDU 60. Stops. At the same time, the supply of the DC power supply voltage from the AC / DC converter 66 to the ODU 40 via the IDU demultiplexing unit 61 and the coaxial cable 50 is also stopped.

  On the other hand, in the ODU 40, the power-off operation signal transferred from the control unit 65 of the IDU 60 is separated by the ODU demultiplexing unit 44 and taken into the power-off operation recognition unit 411 of the control unit 41.

  Here, the power-off operation recognition unit 411 recognizes that the power-off operation of the subscriber radio station 20A has been performed based on the captured power-off operation signal.

  In the ODU 40, the DC power supply voltage supplied from the IDU 60 via the coaxial cable 50 is separated by the ODU demultiplexing unit 44, drawn into the DC / DC converter 45, converted into a predetermined DC voltage, and supplied to each unit. The power supply monitoring unit 47 monitors whether the DC power supply voltage drawn into the DC / DC converter 45 is on or off.

  During this time, the DC power supply voltage is supplied from the AC / DC converter 66 by the switching control of the power switch 67 in the control unit 65 based on the power-off operation signal input to the IDU 60 by the power-off operation at the subscriber terminal 70 described above. Is stopped, the drawing of the DC power supply voltage from the ODU demultiplexing unit 44 to the DC / DC converter 45 is also stopped on the ODU 40 side.

  The power supply monitoring unit 47 detects this state as a DC power supply disconnection, and sends the detection result to the power supply disconnection recognition unit 412 of the control unit 41. The power-off recognition unit 412 recognizes that the power supply has been cut off based on the result of monitoring the power-off by the power supply monitoring unit 47.

  Here, the power-off notification processing unit 413 of the control unit 41 recognizes that “power-off operation has been performed” by the power-off operation recognition unit 411 and “power-off has been performed” by the power-off recognition unit 412. If the two conditions are satisfied, a power-off operation notification signal is generated, and the power-off operation notification signal is transmitted from the antenna 30 to the base station 10 via the transmission system.

  In the ODU 40, after the supply of the DC power from the IDU 60 is stopped and the power supply from the DC / DC converter 45 to the respective units cannot be performed, the standby power is supplied to the control unit 41, the power monitoring circuit 46 and the transmission system. Power supply is performed from 47 to maintain the above-described power-off operation notification control for the base station 10. The standby power supply 48 can be realized using, for example, a super capacitor.

  FIG. 4 is a flowchart showing the power-off notification control operation by the power-off notification processing unit 413 in the control unit 41 of the ODU 40.

  The power-off notification processing unit 413 monitors whether the power has been cut off based on the power monitoring result in the power monitoring unit 47 (step S401).

  When power-off is detected (YES in step S401), it is checked whether the power-off operation recognizing unit 412 has already recognized that the power-off operation of the subscriber radio station 20A has been performed before that (step S402). ).

  Here, if the power-off operation has already been performed (YES in step S402), a power-off operation notification signal for notifying that the subscriber radio station 20A has been turned off by the power-off operation is generated to generate a base station. 10 (step S403).

  On the other hand, if the power-off operation has not yet been performed (NO in step S402), it is determined that the power is abnormally abnormal due to a failure or the like, and an abnormal power-off notification signal for notifying that is sent to the base station 10. (Step S404).

  As described above, in the first embodiment, when the power is turned off by the power-off operation at the subscriber radio station 20A, the base station 10 is notified by the power-off operation notification signal.

  On the other hand, when receiving the power-off operation notification signal from the subscriber radio station 20 </ b> A, the base station 10 transmits the power-off operation notification signal to the NMS 90 via the public network 81.

  The NMS 90 recognizes that the power is turned off by the power-off operation at the corresponding subscriber radio station 20A based on the power-off operation notification signal received from the base station 10, and is able to recognize the recognition result. This is notified in a manner.

  As a result, the NMS 90 can recognize the power-off caused by the power-off operation of each subscriber radio station 20A separately from the power-off caused by a failure or the like, and uses the subscriber radio station 20A that has been turned off by the power-off operation. Thus, it is not necessary to make an inquiry about the power failure to the subscriber's home.

Second embodiment:
FIG. 5 is a block diagram showing a detailed configuration of the subscriber radio station 20B according to the second embodiment.

  The subscriber radio station 20B according to the second embodiment includes an initial setting unit 651, an initial setting data storage unit 652, and an initial setting control unit 653 in the control unit 65 of the IDU 60 as a configuration unique to the present embodiment. Yes.

  Other basic components are the ODU 40 of the subscriber radio station 20A according to the first embodiment, the power monitoring circuit 47, the standby power 48, the power-off recognition unit 411, the power-off operation recognition unit 412, and the power-off notification process. This is equivalent to the part 413 omitted. The operation by this basic component is also equivalent to the operation by the corresponding part of the subscriber radio station 20A according to the first embodiment.

  The subscriber radio station 20B according to the second embodiment is characterized by initial setting processing of data such as communication parameters that enable communication with the base station 10 after the power is turned on and before communication with the base station 10 is started. It is what has.

  That is, the subscriber radio station 20B according to the second embodiment stores data such as communication parameters set at the previous initial setting, and stores the previous initial setting when the power is turned on. Refer to the data (hereinafter referred to as previous data) to determine whether it can be applied to the current communication. Only when it is determined that it is not applicable, the data that can be applied through the normal search / collation routine described later It is obtained and initialized.

  In the configuration shown in FIG. 5, an initial setting unit 651 provided in the control unit 65 of the IDU 60 sequentially acquires data such as various communication parameters necessary for communication with the base station 10 through a normal search / collation routine described later. And means for initial setting.

  The initial setting data storage unit 652 is a means for storing data (previous data) such as communication parameters set at the previous initial setting.

  After the power is turned on, the initial setting control unit 653 refers to the previous data stored in the initial setting data storage unit 652 to determine whether it can be applied to the current communication. If the previous data is set as it is and is not applicable, the initial setting unit 651 is activated, and the initial setting unit 61 performs control to initialize the data acquired by the normal search / collation routine. .

  Next, the initial setting operation of the subscriber radio station 20B according to the present embodiment will be described with reference to the flowchart shown in FIG.

  In FIG. 6, a “normal search / collation routine” shown in step S610 corresponds to an initialization process routine that has been generally performed in this type of apparatus.

  In the subscriber radio station 20B according to the present embodiment, this normal search / verification routine is performed only when it is determined that the previous data cannot be applied. Here, for convenience of explanation, the subscriber radio station 20B is selected. A conventional general search / collation routine will be described first.

  First, in the subscriber radio station 20B, when the subscriber performs an operation to turn on the power switch 67 of the IDU 60, AC power is supplied from the power terminal 68 to the AC / DC converter 66, and the AC / DC converter In 66, the AC power is converted into a DC power supply voltage and supplied to each part in the IDU 60.

  The DC power supply voltage from the AC / DC converter 66 of the IDU 60 is supplied to the DC / DC converter 45 of the ODU 40 via the IDU demultiplexing unit 61, the coaxial cable 50, and the ODU demultiplexing unit 44, and the DC / DC converter 45 Is converted into a predetermined voltage and supplied to each part of the ODU 40.

  When the power is turned on as described above and the subscriber radio station 20B (IDU 60 and ODU 40) becomes operable, the control unit 65 (initial setting unit 651) of the IDU 60 can receive radio waves from the base station 10. In order to establish, the downstream setting process is performed.

  In this downstream setting process, the initial setting unit 651 sequentially performs a series of processes such as (1) reception frequency search, (2) frequency bandwidth verification, and (3) modulation scheme verification. Based on the comparison result, each data (reception frequency, frequency bandwidth, modulation scheme) applicable to communication with the base station 10 is set.

  Specifically, the reception frequency is sequentially searched from 1 channel to n channel by changing the frequency (ch: channel) of the frequency converter 423 in the reception system in order, and demodulating / erroring. A channel in which a signal can be received by the correction decoding unit 623 is set as a reception frequency.

  Further, the verification of the frequency bandwidth and the verification of the modulation scheme specify and set the frequency bandwidth and the modulation scheme by monitoring the signal received by the setting channel.

  When each data setting is completed by the downstream setting process and the radio wave from the base station 10 can be normally received, the initial setting unit 651 proceeds to the upstream setting process.

  In this upstream setting process, the initial setting unit 651 uses, for example, (4) transmission frequency and (5) span equivalent attenuator value (difference in propagation distance from the base station 10) as communication parameters related to radio waves transmitted to the base station 10. (6) A cable equivalent attenuator value (a cable loss caused by a difference in the length of the coaxial cable 50 connecting the ODU 60 and the IDU 40). (7) A transmission output power setting process is sequentially performed for each subscriber radio station 20B.

  In addition, the setting process of each parameter such as (4) to (7) is performed based on setting information included in the received radio wave from the base station 10.

  Specifically, with regard to the transmission frequency, the frequency of the transmission system frequency conversion unit 432 is variably set based on the corresponding setting information included in the signal received by the demodulation / error correction decoding unit 623 under the setting channel. .

  Similarly, with respect to the span equivalent attenuator value and the cable equivalent attenuator value, predetermined reception gain and transmission gain can be obtained for the attenuation levels of the reception ATT 424 and the transmission ATT 431, respectively, based on the corresponding setting information included in the reception signal. Adjust to.

  Similarly, for the transmission output power, the gain of the transmission amplifier 433 is adjusted based on the corresponding setting information included in the received signal.

  When the initial setting of data and communication parameters necessary for reception and transmission is completed through the downstream setting process and the upstream setting process, a line with the base station 10 is established, and the initialized data and communication are set. Communication with the base station 10 is started according to the parameters.

  As described above using the subscriber radio station 20B of this embodiment, in this type of conventional general subscriber radio station 20, the above-described series of downstream setting processes and up-streams are performed each time the power is turned on. For example, the initial setting item data (1) to (7) must be set in order from the beginning by performing the stream setting process, and a long time (for example, about 5 minutes) is required to start communication. became.

  On the other hand, in the actual operation of the subscriber radio station 20B according to the second embodiment, data such as communication parameters set at the time of the previous initial setting is transferred to the initial setting data storage unit 652 in the control unit 65 of the IDU 60. When the power is turned on, the initial setting control unit 653 in the control unit 65 refers to the data (previous data) stored in the initial setting data storage unit 652 and performs the current communication. Is also applicable, and only when it is determined that it is not applicable, control is performed so that applicable data is obtained through the above-described normal search / collation routine and is initially set.

  Here, returning to FIG. 6 again, the communication parameter initial setting operation in the subscriber radio station 20B according to the second embodiment will be described.

  In this subscriber radio station 20B, the control unit 65 (initial setting control unit 653) of the IDU 60 monitors whether or not the power of the IDU 60 is turned on in the above-described procedure (step S601).

  Here, when it is recognized that the power is turned on (YES in step S601), the initial setting control unit 653 starts the initial setting control. Here, first, an initial initial setting item is selected (step S602), and the previous data stored in the initial setting data storage unit 652 is referred to for the initial setting item (step S603).

  Next, the initial setting control unit 653 sets the referenced previous data (step S604), and determines whether or not the previous data is applicable as the current communication parameter (step S605).

  If the previous data is applicable (YES in step S605), the initial setting control unit 653 then checks whether all the initial setting items have been completed (step S606).

  If all the initial setting items are not completed (NO in step S606), the next initial setting item is selected (step S608), and the initial setting item is stored in the initial setting data storage unit 652 before the initial setting item is selected. Data is referred to (step S603).

  Further, the previous data referred to is set (step S604), and it is determined whether or not the previous data can be applied as the current communication parameter (step S605).

  Here, if the previous data is applicable (YES in step S605), the processing after step S606 described above is continued.

  On the other hand, if the previous data is not applicable (NO in step S605), the initial setting control unit 653 activates the initial setting unit 651 to execute a normal search / collation routine for the initial setting item (step S610).

  Then, after initially setting the data (communication parameters) acquired in the search / collation routine (step S611), the process returns to step S606.

  Note that, when data is initially set in step S611, processing for storing the initially set data in the initial setting data storage unit 652 is also performed.

  Thereafter, while it is determined that the initial setting item has not ended (NO in step S606), the initial setting control unit 653 performs the processing of step S608 → S603 to S605 → S606 or step S608 → S603 to S605 → S610 → S611 → S606. When all the initial setting items are completed (YES in step S606), communication with the base station 10 is started using the data (communication parameters) set so far (step S607).

  According to the initial setting control according to the second embodiment, after the power is turned on, the communication parameter of this time is referred to by referring to the previous data for each initial setting item stored in the initial setting data storage unit 652 at the previous initial setting. Since the data acquired through the normal search / collation routine in the initial setting unit 651 is set only when it is not applicable, if the previous data can be applied, The normal search / collation routine (steps S610 and S611 in FIG. 6 (parts indicated by dotted lines in the figure)) for the initial setting items can be omitted.

  As an example, with respect to the reception frequency, for example, 3 channels set in the previous initial setting are set, and if this is applicable, the process can proceed directly to the setting of the next initial setting item. The trouble of sequentially searching from channel to n channel is eliminated.

  Here, the subscriber radio station 20B of the present embodiment is assumed to be for a general household, and considering the operation mode, the subscriber uses a communication service from the subscriber terminal 70 for the purpose of power saving or the like. It is assumed that the subscriber radio station 20B is powered on for a period.

  In this case, since neither the system configuration nor the installation environment conditions have changed, the previous data can be applied to most of the initial setting items, and the normal search / verification routine for these initial setting items is omitted. Thus, the initial setting time can be greatly shortened.

  Therefore, even in an operating environment where the subscriber frequently turns on / off the subscriber radio station 20B in accordance with the above-described purpose, several minutes are required until communication is started each time the power is turned on (power on). Can eliminate the hassle of waiting.

  In addition, in the subscriber radio station 20B whose installation environment conditions have changed, such as relocation, the previously set data (previous data) cannot be applied, and although there is a high possibility that normal search / collation routines will increase, As long as even one exists, the effect of shortening the initial setting time can be expected.

  In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented by being appropriately modified within a range not changing the gist thereof.

  For example, in the first embodiment, the method of recognizing the power-off operation is a method of performing the power-off operation at the subscriber terminal 70 and recognizing based on the power-off operation signal sent from the subscriber terminal 70 by this operation. The present invention is not limited to this, and other appropriate methods such as detecting that the power switch 67 is turned off by the IDU 60 and notifying the ODU 40 may be used.

  In the above description, the configuration of the subscriber radio station having the power-off operation notification function according to the first embodiment and the initial setting control function according to the second embodiment has been described. It is good also as a structure which has both a disconnection operation notification function and an initial setting control function.

  The present invention is applied to a radio access system comprising a base station connected to a communication network and a plurality of subscriber radio stations which are arranged in a radio zone of the base station and perform one-to-many radio communication with the base station. it can.

The figure for demonstrating the whole structure of the radio | wireless access system system concerning this invention. The conceptual diagram which shows schematic structure and arrangement | positioning aspect of the base station and subscriber radio station of the system of FIG. The block diagram which shows the detailed structure of the subscriber radio station concerning a 1st Example. The flowchart which shows the power-off notification control of the subscriber radio station concerning a 1st Example. The block diagram which shows the detailed structure of the subscriber radio station concerning a 2nd Example. The flowchart which shows the initial setting operation | movement of the subscriber radio station concerning a 2nd Example.

Explanation of symbols

1 zone 10 base station 11 antenna 12 outdoor unit (ODU)
13 Indoor unit (IDU)
14 Coaxial cable 20, 20A, 20B Subscriber radio station 30 Antenna 40 Outdoor unit (ODU)
41 Control Unit 411 Power-off Recognizing Unit 412 Power-off Operation Recognizing Unit 413 Power-off Notification Processing Unit 421 Reception Filter 422 Reception Amplifier 423 Frequency Conversion Unit 424 Reception Variable Attenuation Unit
431 Variable attenuation unit for transmission (ATT for transmission)
432 Frequency conversion unit 433 Transmission amplifier 434 Transmission filter 44 ODU demultiplexing unit 45 DC / DC converter 46 Control signal terminal 461 Local oscillator 462 Hybrid circuit 47 Power supply monitoring unit 48 Standby power supply 50 Coaxial cable 60 Indoor unit (IDU)
61 IDU Demultiplexing Unit 621 Receiver 622 A / D Converter 623 Demodulation / Error Correction Decoding Unit 63 Terminal I / F Unit 641 Modulation / Error Correction Encoding Unit 642 Frequency Conversion Unit 643 Variable Attenuation Unit 65 Control Unit 651 Initial Setting Unit 652 Initial setting data storage unit 653 Initial setting control unit 66 AC / DC converter 67 Power switch 68 External power supply terminal 70 Subscriber terminal 80 Communication line 81 Public network 82 ATM network 83 I-private line network 84 Communication network 85 such as the Internet or Intranet Frame relay network 86 N-ISDN
90 Network management equipment (NMS)

Claims (2)

In a radio access system comprising a base station connected to a communication network and a plurality of subscriber radio stations arranged in a radio zone of the base station and performing one-to-many radio communication with the base station,
The subscriber radio station is
Initial setting means for sequentially obtaining and initializing various communication parameter data necessary for communication with the base station through a search / collation routine;
Storage means for storing the initialized data;
After power-on, refer to the previous initial setting data stored in the storage means to determine whether it can be applied to the current communication, and if applicable, set the previous initial setting data as it is and apply If not possible, the wireless access system comprises: initial setting control means for starting the initial setting means and initializing data acquired by the search / collation routine. The subscriber radio station is composed of an indoor device installed indoors and an outdoor device installed outdoors,
The wireless access system according to claim 1, wherein the initial setting unit, the storage unit, and the initial setting control unit are provided in the indoor device.

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