JP2003188884A - Radio access system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a network manager to confirm whether a power interruption is caused by a fault in a subscriber radio station or by a power source interruption operation. <P>SOLUTION: When a power source interruption operation signal which is transmitted from a subscriber terminal 70 is received, a control part 65 of an IDU 60 transfers a power source interruption operation signal to an ODU 40 and also stops power feeding from an AC/DC converter 66 to the respective parts of the IDU 60 and the ODU 40. In the ODU 40, a power source interruption operation recognizing part 412 of a control part 41 recognizes that 'a power source interruption operation is conducted' based on the power source interruption operation signal and a power source interruption recognizing part 411 detects that 'a power source is interrupted' based on a power source interruption monitor result by a power source monitor part 47. A power source interruption report processing part 413 transmits a power source interruption operation report signal to a base station 10 when the two conditions are satisfied, i.e., 'the power source interruption operation is conducted' and 'the power source is interrupted'. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to 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. More specifically, the present invention relates to a power-off operation notification control at the time of power-off operation in a subscriber radio station and an initial setting control of communication parameters at power-on.

[0002]

2. Description of the Related Art For example, as a system configuration for using a communication service by accessing a communication network of a communication carrier from a subscriber terminal, a wireless zone of a base station connected to an exchange or the like of the communication carrier is used. A plurality of subscriber wireless stations are installed in the base station, and a wireless section for performing point-to-multipoint (PTMP) communication between the base station and each subscriber wireless station is provided and connected to the subscriber wireless station. There is known a wireless communication system in which a subscriber terminal that has been created can wirelessly access a communication network of a communication carrier.

In this type of system, a base station recognizes an operating state of a subscriber radio station and notifies the result to a network management apparatus (NMS) via a communication network.
The NMS can monitor the operating state of the radio base station.

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

Assuming that the subscriber radio station is used in a general household, the subscriber may frequently turn on / off the power of the subscriber radio station. In such a case, the subscriber radio station may be turned on / off. There are two types of factors that cause the station to be powered off (power off), such as a failure of the subscriber wireless station and a power-off operation performed by the subscriber.

[0006] 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 are notified to the NMS as power-off.

Therefore, in the conventional system, when the NMS issues a power-off alarm for the subscriber wireless station, it can be distinguished whether the alarm is due to a failure of the subscriber wireless station or a power-off operation by the subscriber. Instead, the inquiry about the abnormality is made to the subscriber's house where the power-off alarm is issued.

On the other hand, in the subscriber radio station of this type of system, when the power is turned on (the power is turned on), a plurality of items that enable communication with the opposite base station are made. It has a function of initializing the communication parameters of (1) and opening a line with the base station to start communication after completion of the initial setting.

Regarding such a function, the conventional subscriber radio station of this type is configured such that every time the power is turned on, the initial setting from the first initial setting item to the final initial setting item is repeated in order. However, it takes a long time (about 5 minutes depending on the model) until the communication with the base station can be started after the power is turned on.

In particular, as described above, in a usage environment in which the subscriber wireless station is used in a general home and the power source is likely to be frequently turned on / off, each time the power source is turned on,
You will have to wait for a long time before communication starts, and in operation
It was very annoying.

[0011]

As described above, in the above conventional system, the base station does not distinguish whether the power is cut off due to the failure of the subscriber radio station or the power is cut off due to the power off operation of the subscriber. Since the NMS has been notified, the NMS that receives the notification and issues a power-off alarm for the subscriber wireless station also determines whether the power is cut off due to a failure of the subscriber wireless station or the power-off due to the power-off operation of the subscriber. Even if the power cannot be recognized and the power is cut off by the subscriber's power-off operation, there is a problem in that the alarm at this time is used to inquire of the subscriber's house with the alarm for an abnormality.

Further, in the above-mentioned conventional system, the subscriber wireless station has a structure in which a plurality of initial setting items are sequentially initialized from the beginning each time the power is turned on, so that the initial setting time is long. In particular, in the case of a subscriber radio station that is used in general households and has a high possibility that the subscriber will frequently turn on / off the power supply, a long waiting time is required before starting communication every time the power is turned on, and it is smooth. There was a problem that operation was hindered.

The present invention eliminates the above-mentioned problems, and in an NMS that monitors the operation of a subscriber radio station, it is possible to recognize whether the power of the subscriber radio station is cut off or the power is cut off. It is an object of the present invention to provide a wireless access system that does not need to inquire of a subscriber's house about an abnormality when the power is cut off by a person's power-off operation.

The present invention also provides a subscriber radio station,
Even in subscriber radio stations that can perform initial settings after power-on in a short time and are likely to frequently power on / off, do not wait a long time before starting communication each time power is turned on. The purpose is to provide a wireless access system that enables smooth operation.

[0015]

In order to achieve the above object, the invention according to claim 1 is a base station connected to a communication network, and a base station arranged in a radio zone of the base station. In a radio access system comprising a plurality of subscriber radio stations performing one-to-many radio communication, the subscriber radio stations are:
Power-off operation recognition means for recognizing that the power-off operation for turning off the power, power-supply monitoring means for monitoring whether the power is on or off, and the power-off operation have been performed and the power has been turned off. In this case, the base station is provided with a notifying means for notifying that the power supply is cut off due to a power-off operation.

According to a second aspect of the present invention, in the first aspect of the present invention, the subscriber wireless station is installed indoors indoors and outdoors, and is supplied with power from the power source in the indoor unit. It is composed of an outdoor device operated by
The power-off operation recognition means, the power supply monitoring means, and the notification means are provided in the outdoor device.

According to a third aspect of the present invention, in the above-mentioned second aspect, the indoor unit transfers to the outdoor unit a power source disconnection operation signal indicating that the power source of the indoor unit power source has been disconnected. In the outdoor unit, the power-off operation recognizing unit comprises means for recognizing that a power-off operation is performed based on the power-off operation signal transferred from the indoor unit. The monitoring means comprises means for monitoring whether the power supply from the indoor power supply is on or off.

According to a fourth aspect of the present invention, 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. In the wireless access system consisting of: the subscriber wireless station, initializing means for sequentially acquiring various communication parameter data required for communication with the base station through a search / verification routine, and initializing the communication parameter data; After the power is turned on, the storage means for storing the stored data and the previous initialization data stored in the storage means are referenced to determine whether or not the communication can be applied to this communication. Initial setting data is set as it is, and if it is not applicable, the initial setting means is started, and initial setting control means for initializing the data acquired by the search / verification routine is provided. And wherein the Rukoto.

According to a fifth aspect of the present invention, in the above-mentioned fourth aspect, the subscriber wireless station is composed of an indoor unit installed indoors and an outdoor unit installed outdoors, and the initial setting is made. The means, the storage means, and the initial setting control means are provided in the indoor device.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a diagram for explaining the overall configuration of a wireless 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 via this base station 10. A plurality of subscriber wireless stations 20 are installed inside the zone 1 which is a range of the above. As shown in FIG. 1, each subscriber radio station 20 has a different distance from the base station 10 depending on its installation location.

Inside the zone 1, between the base station 10 and each subscriber radio station 20, an uplink (direction from the subscriber radio station 20 to the base station 10) and a downlink (base station 1) are respectively provided.
From 0 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 both lines.

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

The network management device 90 has a communication line 8
0, by performing data transmission with the base station 10 and the subscriber wireless station 20 in the zone 1 via the public network 81, the operation of each zone is monitored and controlled.

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

At least any one of these networks
First, a telecommunications carrier's exchange (not shown) is placed,
The exchange is connected to a service system of the communication carrier (a system that manages data corresponding to various communication services operated by the communication carrier).

A subscriber to the above communication service operated by the communication carrier accesses the above service system of the communication carrier through a subscriber wireless station 20 from a subscriber terminal 70, which will be described later, to provide the communication service. Can be used.

In FIG. 1, only one base station 10 and the subscriber radio station 20 arranged in the zone 1 of this base station 10 are disclosed, but in the actual system configuration,
There are a plurality of zones having the same mode as zone 1 (one base station 10 and a plurality of subscriber wireless stations 20 perform PTMP communication), and these zones cover the entire area where the above-mentioned communication service can be provided. It has become so.

FIG. 2 shows the base station 1 in the system of FIG.
2 is a conceptual diagram showing a schematic configuration and an arrangement mode of 0 and the subscriber wireless station 20. FIG.

In FIG. 2, the base station 10 has an antenna 1
1. An outdoor device (OUTDOOR UNI) that is connected to the antenna 11 as the first unit and is installed outdoors of a building such as a building.
T: Hereinafter referred to as ODU. ) 12, Indoor unit (INDOOR UNIT:
Hereinafter referred to as IDU. ) 13, ODU12 and IDU13
And a coaxial cable 14 as a connecting line between them.

On the other hand, the subscriber radio station 20 has the antenna 3
0, an outdoor unit (hereinafter, referred to as an ODU) connected to the antenna 30 as the first unit and installed, for example, outdoors of the subscriber's house.
Say. ) 40, a coaxial cable 50 as a connecting line, and an indoor unit (hereinafter referred to as an IDU) 60 installed inside the subscriber's house as a second unit.

In the following description of the operation of the subscriber radio station 20, the antenna 30 → ODU 40 will be used for convenience.
A signal in the direction of the coaxial cable 50 → IDU60 will be referred to as a reception signal (downstream signal), and conversely, a signal in the direction of IDU60 → coaxial cable 50 → ODU40 → antenna 30 will be described as a transmission signal (upstream signal).

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

Also, the ODU 4 connected to the antenna 30
0 is for converting a radio frequency signal transmitted / received by the antenna 30 into an IF signal which is an intermediate frequency signal, and is usually integrally formed with the antenna 30. Then, the antenna 30 and the ODU 40 are installed by, for example, setting up a pole on the roof of a building and fastening the pole.

The ODU 40 has a coaxial cable 50.
Is connected to the IDU 60 installed indoors via the coaxial cable 50. This coaxial cable 50
Inside is a transmission signal in the intermediate frequency band transmitted from the IDU 60 to the ODU 40 (hereinafter referred to as a transmission IF signal), and a reception signal in the intermediate frequency band transmitted from the ODU 40 to the IDU 60 (hereinafter referred to as a reception IF signal). .), Various control signals, and IDU60 to ODU40
The power supply voltages supplied to the are multiplexed and transmitted.

Further, the subscriber terminal 70 is connected to the IDU 60 via a network such as a LAN and can communicate with an existing network (public network 81 etc.). 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 IDU 60 and the subscriber terminal 70 may be connected directly 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 the detailed arrangement of a subscriber radio station 20A according to the first embodiment.

The entire subscriber radio station 20A has the ODU 4 to which the antenna 30 is connected, as described in the explanation of FIG.
0 and an IDU 60 connected to the ODU 40 via a coaxial cable 50.

A rough structure of the ODU 40 is shown in FIG.
As shown in FIG. 5, the transmission system, the reception system, and the control unit 41 that controls the entire ODU 40 are included.

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 42
Reference numeral 1 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 contrary, the transmission filter 434 has a characteristic of passing the radio frequency band signal for the transmission signal and blocking the radio frequency band signal for the reception signal.

The receiving system through which the received signal passes includes a receiving filter 421, a receiving amplifier 422, and a frequency converter 42.
3. Reception variable attenuator (hereinafter referred to as reception ATT)
It is connected to the ODU demultiplexing unit 44 via 424.

On the other hand, the transmission system through which the transmission signal passes is from the ODU demultiplexing unit 44 to the transmission variable attenuator (hereinafter,
It is called ATT for transmission. ) 431, the frequency converter 432,
The transmission filter 434 is transmitted through the transmission amplifier 433.
It is connected to the. Then, the ODU demultiplexing unit 44
It is connected to a terminal for connecting the coaxial cable 50 for connecting to the DU 60.

The local oscillator frequency is supplied from the local oscillator 461 to the frequency converters 423 and 432 through the hybrid circuit 462.

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

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

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

Further, in the control unit 41, the power interruption recognition unit 4
11, power-off operation recognition unit 412, power-off notification processing unit 41
3 is provided.

The power supply monitoring unit 47 monitors on / off of power supplied from the IDU 60 via the coaxial cable 50 and the ODU demultiplexing unit 44, and the monitoring result is monitored by the control unit 41.
The power failure recognition unit 411 is notified.

The power-off recognizing 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 for turning off the power of the subscriber radio station 20A has been performed. As an example, in the present embodiment, as will be described later, when the subscriber terminal 70 powers off the subscriber radio station 20A, the subscriber terminal 70 sends the subscriber terminal 70 and the data is transferred via the ODU 60. Recognize that the power off operation has been performed based on the power off operation signal.

When the power-off operation recognition unit 412 recognizes that the power-off operation is performed and the power-off recognition unit 411 recognizes that the power is cut off, the power-off notification processing unit 413 turns off the power. A disconnection operation notification signal is generated and sent to the base station 10.

The standby power source 48 is controlled by the control unit 65 of the IDU 60 based on the power off operation signal from the subscriber terminal 70.
From C / DC converter 66 to each part of own IDU 60 and OD
The OD after controlling to stop the power supply to U40
It is used as a power source for compensating the operation of the control unit 41 and the transmission system related to the transmission of the power-off operation notification signal in the U40.

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

In the IDU 60, a terminal connected to the coaxial cable 50 has an IDU for separating 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.
The demultiplexing unit 61 is connected.

Then, the receiving system includes an IDU demultiplexing unit 61.
From the receiver 621, the A / D converter 622, and the demodulation / error correction decoding unit 623 to the terminal I / F unit 63.

On the other hand, the transmission system is connected to 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 to the IDU demultiplexing unit 61. .

The IDU 60 is also 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 has an external power supply terminal 68 when the power switch 67 is in the ON state (closed state).
AC power source (AC100V in this example)
To DC to generate a predetermined DC power supply voltage.

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

The control section 65 controls the entire IDU 60, and the power off control of the IDU 60 is also included in the control. The power-off control of the IDU 60 is performed, for example, 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 provided from the subscriber terminal 70 via the terminal I / F unit 63. It is realized by switching to.

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 section 63 to turn on the power switch 6.
There is a method to switch 7 to the ON state (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.

The reception signal in the radio frequency band 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 into a reception IF signal by mixing with the local oscillation signal output from the local oscillator 461 via the hybrid circuit 462 by the frequency conversion unit 423,
It is input to the receiving ATT 424.

Here, the receiving ATT 424 has the control unit 4
It is attenuated to a level based on the control from 1. By adjusting this level, the reception gain of ODU can be adjusted. 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 the transmission I
The frequency and band of the F signal are different. Therefore, even if it is multiplexed with the transmission IF signal, it can be separated later. The power supply voltage transmitted from the IDU 60 is
Separation is possible because it is a DC voltage.

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 into a digital signal by the A / D converter 622, demodulation / error correction decoding unit 623 demodulates and decodes the error correction code.

The demodulation / error correction decoding unit 623 has a TPC (Transm) for controlling the transmission level from the base station 10.
It power control) control signal is extracted, and this TPC control signal is output 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, the transmission signal input from the subscriber terminal 70 to the IDU 60 is input to the modulation / error correction coding unit 641 where it is subjected to error correction coding such as Reed-Solomon code and modulated. Then, the frequency conversion unit 642
Is frequency-converted into a transmission IF signal. Here, the IF signal for transmission has a frequency band different from that of the IF signal for reception, as described above.

Then, the variable attenuator 643 causes the base station 10 to
Is controlled to a level based on a TPC control signal for controlling the transmission level transmitted from the IDU demultiplexing unit 61. Here, the power supply voltage and the like are multiplexed 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 or the like by the ODU demultiplexing unit 44 and input to the transmission ATT 431.

Here, the transmitting ATT 431 has the control unit 4
It is attenuated to a level based on the control from 1. By adjusting this level, the transmission gain of the ODU 40 can be adjusted.

The transmission IF signal attenuated to a desired level by the transmission ATT 431 is input to the frequency conversion unit 432. Then, the transmission IF signal is mixed by the frequency conversion unit 432 with the local oscillation signal output from the local oscillator 461 through the hybrid circuit 462,
The frequency is converted into a radio frequency band signal, and the transmission amplifier 43
After being amplified to a predetermined voltage in 3, the signal 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 has been cut off by the power-off operation when the power is turned off (power-off) by the subscriber.

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

By this power-off operation, the subscriber terminal 70
Then, a power-off operation signal is generated, 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 section 65 sends the power-off operation signal to the IDU demultiplexing section 61,
Transfer to the ODU 40 via the coaxial cable 50.

When the power-off operation signal is input, the control section 65 switches the power switch 67 to the off state (open state) based on the signal.

By this switching control, the AC power which has been supplied to the AC / DC converter 66 from the external power supply terminal 68 through the power switch 67 until then is cut off, and the A
DC from C / DC converter 66 to each part in IDU 60
Power supply stops. At the same time, AC / D
The supply of the DC power supply voltage from the C 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 the power-off operation recognition unit 4 of the control unit 41.
Taken in 11.

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 fetched power-off operation signal.

In the ODU 40, the DC power supply voltage supplied from the IDU 60 via the coaxial cable 50 is OD.
DC / DC converter 45 separated by U demultiplexer 44
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 period, the DC power from the AC / DC converter 66 is controlled by switching the power switch 67 in the controller 65 based on the power-off operation signal input to the IDU 60 by the power-off operation in the subscriber terminal 70 described above. When the supply of voltage is stopped, OD is also set on the ODU40 side.
The drawing of the DC power supply voltage from the U demultiplexing unit 44 to the DC / DC converter 45 stops.

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 cutoff recognition unit 412 recognizes that the power supply is cut off based on the monitoring result of the power supply off by the power supply monitoring unit 47.

Here, the power-off notification processing unit 4 of the control unit 41
13 checks whether or not the power-off operation recognizing unit 411 recognizes that "the power-off operation has been performed" and the power-off recognition unit 412 recognizes that "the power has been disconnected". When the two conditions are satisfied, a power-off operation notification signal is generated, and the power-off operation notification signal is sent from the antenna 30 to the base station 10 via the transmission system.

In the ODU 40, the DC power supply from the IDU 60 is stopped and the DC / DC converter 4
After the power supply from 5 to each unit becomes impossible, the standby power supply 4 is supplied to the control unit 41, the power supply monitoring circuit 46 and the transmission system.
Power is supplied from 7 to maintain the above-described power-off operation notification control for the base station 10. The standby power supply 48 can be realized by using, for example, a super capacitor or the like.

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 has the power-source monitoring unit 4
It is monitored whether or not the power supply is cut off based on the power supply monitoring result in step 7 (step S401).

When power failure is detected (step S40)
1 YES), and it is checked whether or not the power-off operation recognizing unit 412 has already recognized that the power-off operation of the subscriber wireless station 20A has been performed (step S402).

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

On the other hand, if the power-off operation has not been performed yet (step S402: NO), it is determined that the power is abnormal due to a failure or the like, and an abnormal power-off notification signal for notifying the fact is sent to the base station 10. To (step S4
04).

As described above, in the first embodiment, when the subscriber wireless station 20A is powered off by the power-off operation, the fact is notified to the base station 10 by the power-off operation notification signal.

On the other hand, in the base station 10, the subscriber radio station 20
When the power-off operation notification signal is received from A, the power-off operation notification signal is transmitted to the NMS 90 via the public network 81.

Based on the power-off operation notification signal received from the base station 10, the NMS 90 recognizes that the power is cut off by the power-off operation in the corresponding subscriber radio station 20A, and the recognition result can be known. That is notified in a predetermined manner.

As a result, the NMS 90 can recognize the power-off due to the power-off operation of each subscriber radio station 20A separately from the power-off due to a failure, etc., and the subscriber radio stations which have been turned off by the power-off operation. It is not necessary to make an inquiry about the power cut abnormality to the home of the subscriber who uses the 20A.

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

Subscriber radio station 20B according to the second embodiment.
Is a control unit 6 of the IDU 60 as a configuration peculiar to this embodiment.
5 includes an initial setting unit 651 and an initial setting data storage unit 65.
2. An initial setting control unit 653 is provided.

Regarding the other basic constituent parts,
From the ODU 40 of the subscriber wireless station 20A according to the embodiment of FIG.
1, power-off operation recognition unit 412, power-off notification processing unit 413
Is equivalent to the one without. The operation of this basic component is also the same as the operation of the relevant portion of the subscriber radio station 20A according to the first embodiment.

Subscriber radio station 20B according to the second embodiment.
Is characterized by an initial setting process of data such as communication parameters enabling communication with the base station 10 after the power is turned on and before the communication with the base station 10 is started.

That is, the subscriber radio station 20B according to the second embodiment stores data such as communication parameters set at the time of the initial setting last time, and stores the data when the power is turned on. It is determined whether it is applicable to this communication by referring to the previous initialization data (hereinafter referred to as the previous data). Only when it is determined that it is not applicable, it is possible to apply it through the normal search / matching routine described later. It obtains various data and initializes it.

In the configuration shown in FIG. 5, the initial setting section 651 provided in the control section 65 of the IDU 60 is the base station 1
This is means for sequentially acquiring data such as various communication parameters necessary for communication with 0 through a normal search / verification routine described later and initializing the data.

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

After 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 or not it is applicable to this communication, and the previous data is applicable. If so, the previous data is set as it is, and if it is not applicable, the initialization unit 651 is activated, and control is performed to initialize the data acquired by the normal search / verification routine in the initialization unit 61. It is a means.

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

Incidentally, in FIG. 6, the "normal search / collation routine" shown in step S610 corresponds to the initialization processing routine which is generally performed conventionally in this type of apparatus.

In the subscriber radio station 20B according to this embodiment, this normal search / collation routine is executed only when it is judged that the previous data cannot be applied, but here, for convenience of explanation, the subscriber radio station concerned is concerned. The conventional general search / matching routine using the station 20B will be described first.

First, in the subscriber radio station 20B, when the subscriber operates the power switch 67 of the IDU 60 to the power-on state, the AC / D signal is supplied from the power terminal 68.
AC power is supplied to the C converter 66, and this AC power is converted into a DC power supply voltage in the AC / DC converter 66 and supplied to each unit in the IDU 60.

The DC power supply voltage from the AC / DC converter 66 of the IDU 60 is passed through the IDU demultiplexing unit 61, the coaxial cable 50, and the ODU demultiplexing unit 44 to the ODU4.
0 to the DC / DC converter 45,
It is converted into a predetermined voltage by the C converter 45 and the ODU 40
Is supplied to each part of.

When the subscriber radio station 20B (IDU60 and ODU40) is turned on as described above and the subscriber radio station 20B becomes operable, the control unit 65 (initial setting unit 65) of the IDU60.
In 1), a downstream setting process is performed in order to establish a state in which radio waves from the base station 10 can be received.

In this downstream setting process,
The initial setting unit 651 sequentially performs a series of processes such as a search of a reception frequency, a matching of a frequency bandwidth, and a matching of a modulation method, and each data applicable to communication with the base station 10 based on the search and matching results. (Reception frequency, frequency bandwidth, modulation method) is set.

Specifically, with respect to the reception frequency, by sequentially changing the frequency (ch: channel) of the frequency conversion unit 423 of the reception system to perform the reception operation, the channels 1 to n are sequentially searched. The channel in which the demodulation / error correction decoding unit 623 can receive the signal is set as the reception frequency.

The frequency bandwidth verification and the modulation method verification are performed by monitoring the signal received on the set channel to specify and set the frequency bandwidth and the modulation method.

When the above-mentioned data setting is completed by the above-mentioned downstream setting processing and the radio wave from the base station 10 can be normally received, the initial setting section 651 then
Move to upstream setting processing.

In this upstream setting process,
The initialization unit 651 uses, for example, a transmission frequency and a span equivalent attenuator value (propagation loss caused by a difference in propagation distance from the base station 10 as a communication parameter for a radio wave transmitted to the base station 10 for each subscriber radio station 20B). A value for maintaining the same level), a cable equivalent attenuator value (a coaxial cable 5 for connecting the ODU 60 and the IDU 40)
A value for keeping the cable loss caused by the difference in the length of 0 at the same level for each subscriber radio station 20B) and the transmission output power setting process are sequentially performed.

The setting process of each of these parameters and the like is performed based on the setting information included in the radio wave received from the base station 10.

Specifically, regarding the transmission frequency, the frequency of the frequency conversion unit 432 of the transmission system is set based on the corresponding setting information included in the signal received by the demodulation / error correction decoding unit 623 under the above-mentioned setting channel. Variable setting.

Similarly, for the span equivalent attenuator value and the cable equivalent attenuator value, the attenuation levels of the receiving ATT 424 and the transmitting ATT 431 are set to the predetermined receiving gain and transmitting gain based on the corresponding setting information contained in the receiving signal. Adjust to obtain.

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

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

As described above using the subscriber radio station 20B of the present embodiment, in the conventional general subscriber radio station 20 of this type, each time the power is turned on, the series of downstream settings described above are set. It is necessary to perform the processing and the upstream setting processing to set each of the initial setting item data of, for example, in order from the beginning, and it takes a long time (for example, about 5 minutes) to start the communication.

On the other hand, in the actual operation of the subscriber radio station 20B according to the second embodiment, the data such as the communication parameters set at the time of the previous initialization is used as the initialization data in the control unit 65 of the IDU 60. When stored in the storage unit 652 and 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 this time. It is determined whether or not it can be applied to the communication of 1., and only when it is determined that it is not applicable, the applicable data is obtained through the above-described normal search / collation routine, and the initialization is controlled.

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

At this subscriber radio station 20B, the IDU
The control unit 65 (initial setting control unit 653) of 60 monitors whether or not the power of the IDU 60 is turned on by 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 65.
3 starts the initial setting control. Here, first, the first initial setting item is selected (step S602), and the previous data stored in the initial setting data storage unit 652 for the initial setting item is referred to (step S603).

Next, the initial setting control unit 653 sets the referred previous data (step S604), and determines whether this previous data is applicable as the communication parameter this time (step S605).

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

When all the initial setting items have not been completed (step S606 NO), the next initial setting item is selected (step S608), and the initial setting item is stored in the initial setting data storage unit 652. The previous data is referred to (step S603).

Further, the referred previous data is set (step S604), and it is determined whether this previous data is applicable as the communication parameter this time (step S605).

If the previous data is applicable (YES in step S605), the processing in step S606 and subsequent steps described above is continued.

On the other hand, when the previous data is not applicable (NO in step S605), the initialization control unit 653 activates the initialization unit 651 to execute a normal search / verification routine for the initialization item (step S6).
10).

Then, the data (communication parameters) obtained in the search / collation routine are initialized (step S611), and the process returns to step S606.

When the data is initialized in step S611, a process of storing the initialized data in the initialization data storage unit 652 is also performed.

Thereafter, the initial setting control unit 653 determines that the initial setting items are not completed (step S6).
06 NO), steps S608 → S603 to S605 →
S606 or step S608 → S603 to S60
When the process of 5 → S610 → S611 → S606 is repeated and all the initial setting items are completed (step S6)
06YES), and starts communication with the base station 10 using the data (communication parameters) set up to that point (step S607).

According to the initialization control according to the second embodiment, after the power is turned on, the previous data for each initialization item stored in the initialization data storage unit 652 at the time of the previous initialization is referred to this time. It is determined whether or not it can be applied as a communication parameter of, and only when it is not applicable, the initial setting unit 6
Since the data acquired through the normal search / matching routine in 51 is set, if the previous data is applicable, the normal search / matching routine for the initial setting item (step S610 in FIG. 6). , S
611 (indicated by a dotted line in the figure)) can be omitted.

As an example, regarding the reception frequency,
If, for example, 3 channels set in the previous initial setting are set and this is applicable, the process can proceed to the setting of the next initial setting item as it is, and sequentially search from 1 channel to n channel. There is no such complication.

Here, it is assumed that the subscriber radio station 20B of the present embodiment is intended for general households, and considering its operation form, the subscriber terminal 70 for the purpose of power saving etc.
Subscriber station 20
It is assumed that the power of B is turned on.

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 normal search / verification for these initial setting items is possible. By omitting the routine, the initialization time can be greatly reduced.

Therefore, in accordance with the above purpose, even in an operating environment in which the subscriber frequently turns on / off (on / off) the power of the subscriber radio station 20B, every time the power is turned on (power on), communication is started. You can eliminate the hassle of having to wait several minutes.

In the subscriber wireless station 20B whose installation environment condition has changed due to relocation or the like, the previously set data (previous data) can no longer be applied, and there is a high possibility that ordinary search / verification routines will increase, but There is 1 data before
As long as one exists, the effect of shortening the initial setting time can be expected.

Besides, the present invention is not limited to the embodiments described above and shown in the drawings, but can be appropriately modified and implemented within the scope of not changing the gist thereof.

For example, in the first embodiment, the method for recognizing the power-off operation is that the power-off operation is performed at the subscriber terminal 70, and the power-off operation signal sent from the subscriber terminal 70 by this operation is used. Not limited to the recognition method, IDU
Other appropriate methods such as detecting that the power switch 67 is turned off at 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 initialization control function according to the second embodiment has been described. The power off operation notification function and the initial setting control function may be combined.

[0146]

As described above, according to the first aspect of the invention, the subscriber radio station is provided with means for recognizing that the power-off operation has been performed, and means for monitoring the power on / off.
When the power is turned off and the power is turned off, the base station is notified that the power was turned off due to the power off operation. Based on the fact that the base station further notifies the network management device that the power has been cut off due to the power-off operation of the subscriber wireless station, whether or not the network management device is powered off due to a failure of the subscriber wireless station, It is possible to recognize whether the power is off due to the power off operation, and in the case of the power off due to the power off operation of the subscriber, it becomes unnecessary to make an inquiry to the subscriber's house about the abnormality.

According to the second aspect of the invention, the subscriber radio station is provided with a means for storing the previous initialization data, and after the power is turned on, the stored previous initialization data is referred to for the current communication. If it is applicable, the previous initial setting data is set as it is, and if it is not applicable, the data acquired through the normal search / matching routine is initialized. Therefore, if the previous initialization data can be applied, the normal search / matching routine can be omitted and the initialization time can be shortened. In particular, for subscriber wireless stations that are installed in general households and the installation environment does not change, initial settings can be completed and communication can be started in a short time after the power is turned on. Can be operated.

[Brief description of drawings]

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

2 is a conceptual diagram showing a schematic configuration and arrangement of a base station and a subscriber wireless station of the system of FIG.

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

FIG. 4 is a flowchart showing a power-off notification control of a subscriber wireless station according to the first embodiment.

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

FIG. 6 is a flowchart showing an initial setting operation of a subscriber wireless station according to the second embodiment.

[Explanation of symbols]

1 zone 10 base stations 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 cutoff recognition unit 412 Power cut operation recognition unit 413 Power interruption notification processing unit 421 Reception filter 422 Receiver amplifier 423 Frequency converter 424 Variable Attenuator for Reception (ATT for Reception) 431 Variable Attenuator for Transmission (ATT for Transmission) 432 Frequency converter 433 Transmission amplifier 434 Transmission Filter 44 ODU demultiplexer 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 demultiplexer 621 receiver 622 A / D converter 623 Demodulation / error correction decoding section 63 Terminal I / F part 641 Modulation / Error Correction Coding Unit 642 frequency converter 643 Variable attenuator 65 Control unit 651 initial setting section 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 lines 81 public network 82 ATM network 83 I-dedicated line network 84 Communication networks such as the Internet and Intranet 85 frame relay network 86 N-ISDN 90 Network Management Device (NMS)

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04M 3/00 H04B 7/26 L 5K067 F term (reference) 5K030 JL08 JT09 KA23 5K033 DA17 EB04 EC01 5K034 AA02 AA16 DD02 EE03 TT02 TT04 5K042 AA06 CA02 CA13 CA24 5K051 BB05 CC07 DD01 LL00 5K067 AA34 BB02 DD27 EE02 EE10 FF19 GG01 KK05 LL05

Claims (5)

[Claims] 1. 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 wireless station recognizes that a power-off operation has been performed to turn off the power, a power-off operation recognition means, a power-source monitoring means that monitors whether the power is on or off, and the power-off operation is performed. And, when the power is turned off, the radio access system is provided with a notifying unit for notifying the base station that the power is turned off by a power-off operation. 2. The subscriber wireless station includes an indoor device installed indoors and an outdoor device installed outdoors, which is operated by a power supply from the power supply inside the indoor device. The wireless access system according to claim 1, wherein the means, the power supply monitoring means, and the notification means are provided in the outdoor device. 3. The indoor unit comprises a transfer means for transferring a power-off operation signal indicating that a power-off operation of the power supply in the indoor unit has been performed, to the outdoor unit, wherein the outdoor unit disconnects the power. The operation recognition means comprises means for recognizing that a power-off operation has been performed based on the power-off operation signal transferred from the indoor device, and the power supply monitoring means turns on the power supply from the indoor power supply. A radio access system according to claim 2, characterized in that it comprises means for monitoring whether it is off or off. 4. 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 wireless station sequentially acquires various communication parameter data necessary for communication with the base station through a search / verification routine and initializes the data, and a storage for storing the initialized data. Means and the previous initialization data stored in the storage means after power-on to determine whether it is applicable to this communication, and if applicable, set the previous initialization data as it is. If not applicable, the apparatus further comprises initial setting control means for activating the initial setting means and initializing the data acquired by the search / matching routine. Wireless access system. 5. The subscriber wireless station includes an indoor device installed indoors and an outdoor device installed outdoors, and the initial setting means, the storage means, and the initial setting control means include the indoor equipment. The wireless access system according to claim 4, wherein the wireless access system is provided in the device.