JP2009153141A - Wireless subscriber system, line connection control device for wireless subscriber system, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably allocate a radio channel for an emergency call and a call of a subscriber to be preferentially connected even when the radio channel is congested.
A wireless channel set between a subscriber wireless device (SU-A, SU-B,...) And a subscriber wireless device connected to a switchboard 12 of a public switched telephone network via a subscriber line. And a line connection control device (22, 24) for controlling connection of the subscriber line, and when the wireless channel is in a congested state, a new call request from the subscriber, or When there is an incoming call to the subscriber, the call request is made based on a determination as to whether the call is an emergency call including a call currently in a call and having a high and low priority connection class and an urgent call. Alternatively, connection processing for incoming calls is performed.
[Selection] Figure 1

Description

  The present invention relates to a so-called wireless local loop (WLL) in which a subscriber line between a switch and a subscriber's premises in a public switched telephone network (PSTN) is made wireless. )), Which is a program executable by a computer for realizing the functions of the wireless subscriber system, the line connection control device of the wireless subscriber system, and the line connection control device of the wireless subscriber system. The present invention relates to a recording medium on which is recorded.

  In the public switched telephone network, the concentrator system located between the exchange and the subscriber's home is generally called an access network (Access Network), and a wireless local loop is a wireless system installed in the access network. It is called a system.

  This wireless subscriber system is a system that transparently conveys the on-hook / off-hook status of subscriber lines, voice, incoming calls, etc., detects incoming calls from the exchange and transmits them to the subscriber's wireless terminal to make telephone calls. When a telephone call is made or a subscriber (user) raises a telephone handset (off-hook), a radio channel and a call channel to an exchange are established, and a call can be made. In many cases, a conventional mobile telephone system is applied to the wireless subscriber system.

  In such a wireless subscriber system, when the channel used for the wireless part of the subscriber line is congested, even if another subscriber terminal tries to make a call, the wireless base station rejects the call. I can't talk. In addition, in a state where the channel used for the wireless part of the subscriber line is congested, even if another incoming call is generated, the incoming call is rejected by the wireless base station, and a call cannot be made. This is generally influenced by the fact that the number of radio channels in the radio subscriber system is smaller than the number of subscriber lines accommodated, which means that when a radio channel is congested, a subscriber This means that a call cannot be made even if an attempt is made to call an emergency partner (for example, police or fire department). Further, when an incoming call is made to a subscriber, if the subscriber is an important subscriber such as the police or an important person, a social problem may occur.

  The configuration of a conventional wireless subscriber system is shown in FIG. In the figure, an exchange 12 provided in a public switched telephone network 10 includes subscriber lines such as subscriber lines A and B, and telephones 210A, 210B,... ,It is connected to the. The wireless subscriber system 200 includes a line connection control device 202 connected to the exchange 12 via a subscriber line, and a subscriber wireless device as a subscriber terminal connected to the line connection control device 202 via a wireless channel. SU-A, SU-B,... The line connection control apparatus 202 includes the function of a radio base station.

  The subscriber radio apparatuses SU-A, SU-B,... Are installed in the subscriber premises, and the subscriber radio apparatuses SU-A, SU-B,. , Each connected. Here, the user B is a registered subscriber or a subscriber who wants to make a call to a registered subscriber or an urgent destination, and the user A is a subscriber who is not registered, Alternatively, it is assumed that the subscriber is talking as a non-emergency call that does not require an emergency. Further, the subscriber wireless device SU-A installed in the subscriber A's home is connected to the subscriber line A, and the subscriber wireless device SU-B installed in the subscriber B's home is connected to the subscriber line B. As described above, the subscriber line and the subscriber radio apparatus have a one-to-one correspondence.

  An example of the control operation when the wireless channel in the wireless subscriber system 200 is in a congested state will be described with reference to FIG. In FIG. 11, the interface between the exchange 12 and the line connection control device 202 is a two-wire analog line, and the connection between the line connection control device 202 and each subscriber radio device SU-A, SU-B,. In addition to an interface, the interface between each subscriber radio apparatus SU-A, SU-B,... And each corresponding subscriber telephone 210A, 210B,. The control sequence when an incoming call occurs in a congested state is shown.

  In the above configuration, when the subscriber line A and the user A are currently talking and there is an incoming call to the user B, the exchange 12 sends a ringing signal (Ring) to the line connection control device 202 via the subscriber line B. Is output, and the line connection control device 202 outputs an incoming call message (Paging) to the subscriber wireless device SU-B. Next, a link channel establishment request message including identification information (PSID) of the called terminal is output from the subscriber radio apparatus SU-B to the line connection control apparatus 202.

  The line connection control device 202 sends a message to the subscriber wireless device SU-B that denies the allocation of the link channel for the incoming call to the called user B when all of the wireless channels are in use or cannot be used. To send. As a result, the incoming call to the user B is rejected.

  Next, another example of the control operation when the wireless channel in the wireless subscriber system 200 is in a congested state will be described with reference to FIG. In FIG. 12, the interface between the exchange 12 and the line connection control device 202 is a two-wire analog line, and the connection between the line connection control device 202 and each subscriber radio device SU-A, SU-B,. In addition to an interface, the interface between each subscriber radio device SU-A, SU-B,... And the corresponding subscriber telephone 210A, 210B,. Shows a control sequence when an attempt is made to make a call to an emergency destination requiring an emergency when the radio channel is congested.

  In the above configuration, when the subscriber line A and the user A are talking and the user B's telephone 210B is off-hooked and a call notification is output to the subscriber radio unit SU-B, the subscriber radio unit SU-B. -B outputs a link channel establishment request message including the identification information of the calling terminal to the line connection control device 202.

  When all of the radio channels are in use or cannot be used, the line connection control apparatus 202 sends a message to the subscriber radio apparatus SU-B that denies the allocation of the link channel for the call by the user B as the call originator. Then, a busy tone indicating that the radio channel is in use is transmitted from the subscriber radio apparatus SU-B to the telephone 210B of the user B. As a result, the user B puts the handset of the telephone 210B (on-hook), and an end signal is output from the telephone 210B to the subscriber radio apparatus SU-B.

  In the wireless subscriber system described above, when the wireless channel is in a congested state, the allocation of the link channel is rejected even if a call request as an emergency call is generated. There was a problem that a radio channel could not be reliably assigned to an emergency call. In addition, when there is an incoming call to a specific subscriber for a telephone carrier, it is often required to connect the subscriber line with priority, but in the wireless subscriber system described above, When the radio channel is in a congested state, since the allocation of the link channel is rejected for the incoming call to the subscriber that occurs thereafter, there is a problem that the above request cannot be satisfied. In this state, there is also a problem that the subscriber cannot make a call even if he / she wants to call an emergency partner such as the police.

  The present invention has been made in view of such circumstances, and there is a call request (emergency call) from a subscriber who calls an urgent destination even when the radio channel is congested. Or, when there is an incoming call to a subscriber to be preferentially connected, a radio channel can be reliably allocated for an emergency call or a call of a subscriber to be preferentially connected, and a normal call (non-emergency call) , Emergency call and call of subscriber to be preferentially connected without distinction, wireless subscriber system, line connection control device of wireless subscriber system, and function of line connection control device of wireless subscriber system An object of the present invention is to provide a recording medium on which a program for realizing the above is recorded.

  In order to achieve the above object, the invention described in claim 1 is a subscriber wireless device installed in a subscriber's house and connected to a telephone, and connected to a switch of a public switched telephone network via a subscriber line. In a wireless subscriber system having a wireless channel set with a wireless device and a line connection control device for controlling connection of the subscriber line, the line connection control device indicates a priority connection class indicating a priority connection order. When data and subscriber identification information for specifying a subscriber are registered in advance and the telephone number of a specific destination requiring urgent registration is registered in advance, and the radio channel is in a congested state In this case, when there is a new call request from the subscriber or an incoming call to the subscriber, the emergency call is a call having a high and low priority connection class and urgency with respect to the call currently being communicated And performing connection processing for said call request or called based on a determination of whether or not.

  According to the first aspect of the present invention, between the subscriber radio apparatus installed in the subscriber's house and connected to the telephone, and the subscriber radio apparatus connected to the exchange of the public switched telephone network via the subscriber line. In the wireless subscriber system having a wireless channel set to 1 and a line connection control device that performs connection control of the subscriber line, the line connection control device includes priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information for identification is registered in advance, and the telephone number of a specific destination requiring urgent registration is registered in advance, and a new subscription is made when the radio channel is congested. When there is a call request from the subscriber or an incoming call to the subscriber, it is determined whether or not the call currently in a call is an emergency call that is a call having high and low priority connection classes and urgency. Since the connection process for the call request or the incoming call is performed based on the call request, the call request (emergency call) from the subscriber who calls the other party that requires an emergency is received even if the radio channel is congested. If there is an incoming call to a subscriber to be preferentially connected or an incoming call to a subscriber to be preferentially connected, a radio channel can be surely allocated for the call of the subscriber to be preferentially connected, and a normal call ( Non-emergency calls) and emergency calls and subscriber calls to be preferentially connected can be accommodated without distinction. For this reason, channel resources can be used effectively.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a wireless subscriber system having a line connection control device for controlling connection of a subscriber line, the line connection control device receives priority connection class data indicating a priority connection order and subscriber identification information for specifying a subscriber. Correspondingly registering in advance and registering the telephone number of a specific destination that requires urgentness in advance, and in an ordinary operation state, it is not assigned to a subscriber's call, but is an urgent call that requires urgent If there are multiple reserved radio channels used for a call and the radio channel is in a congested state, when a new call request is received from the subscriber, a call that is already in a call If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require emergency, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnects the assigned radio channel, assigns the disconnected radio channel to the call for which the call request has been made, and prioritized connection class from the current calling subscriber among calls already in a call If there is no subscriber call that is a non-emergency call that is low and does not require an emergency, one of the reserved radio channels is temporarily assigned to the call that requested the call If the call with the call request is an emergency call, the call is continued, and is a non-emergency call among the calls currently being talked to and one of the calls with the lowest priority connection class Forcibly disconnect the assigned radio channel And, the call for which the said call request is said to be a non-emergency call once the assigned reserved radio channels forcibly disconnected, can be configured to be released.

  In addition, in the wireless subscriber system, the line connection control device, when the wireless channel is in a congested state, when a new incoming call is made to the subscriber, When there is a non-emergency call that has a lower priority connection class than the call subscriber and does not require an emergency, one of the non-emergency calls is selected as a call to be disconnected and assigned to the call to be disconnected The radio channel is forcibly disconnected, the disconnected radio channel is assigned to the incoming call, and the priority connection class is lower than the incoming call subscriber of the current call and the call is a non-emergency call If there is no call from the subscriber, the incoming call can be rejected.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a radio subscriber system having a line connection control device for controlling connection of a subscriber line, the subscriber radio device includes a subscriber identification information to the line connection control device when the subscriber makes a call. A call request message is transmitted, and the line connection control device outputs a call that is output from the exchange to the subscriber line from the call request message received from the subscriber radio device or when an incoming call to the subscriber occurs. Subscriber identification information extracting means for extracting subscriber identification information from a signal, a telephone number of a specific destination requiring emergency, and the number of reserved radio channels used for an emergency call that is an emergency call And a first storage means for storing the number of all wireless channels settable by the wireless subscriber system in advance, storing the number of currently used wireless channels, subscriber identification information for identifying the subscriber, and wireless channels Second storage means preliminarily registered in association with the priority connection class data indicating the priority in the connection, subscriber identification information, and the call duration of the call during the call in association with the subscriber identification information A third storage means for storing identification information indicating a priority connection class and identification information indicating whether the call is an emergency call or a non-emergency call; and the number of reserved channels stored in the first storage means, Whether or not the radio channel is congested is determined based on the data of the total number of radio channels and the number of radio channels currently in use, and when the radio channel is congested, The telephone number dialed based on the call request when there is a request matches the telephone number of a specific destination requiring emergency registered in the first storage means. A first determination unit that determines whether or not the call is an emergency call, and registers the determination result in the third storage unit; and the subscription that requested the call extracted by the subscriber identification information extraction unit The identification information indicating the priority connection class of the subscriber is retrieved from the second storage means based on the subscriber identification information of the subscriber, the priority connection class of the subscriber who requested the call is determined, and the determination result is The second determination means registered in the third storage means and the contents stored in the third storage means when a new call request is made from a subscriber when the radio channel is in a congested state Is already in a call based on the search result If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require an emergency call, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnects the wireless channel assigned to the target call, assigns the disconnected wireless channel to the call for which the call request has been made, and from the current calling subscriber among calls already in a call If there is no subscriber call that is a non-emergency call with a low priority connection class and a call that does not require an emergency, one of the plurality of reserved radio channels is assigned to the call that requested the call. Once it is determined that the call with the call request is determined to be an emergency call by the first determination means, the call is continued and a non-emergency call among the currently active calls And assigned to one of the calls with the lowest priority connection class. Forcibly disconnecting and releasing the received radio channel, and when the call with the call request is determined to be a non-emergency call by the first determination means And a radio channel connection control means for controlling to forcibly disconnect and release the reserved radio channel.

  Further, a subscriber wireless device installed in a subscriber's house and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a public switched telephone network switch via a subscriber line, and the subscription In a radio subscriber system having a line connection control device for controlling connection of a subscriber line, the subscriber radio device includes a subscriber identification information to the line connection control device when the subscriber makes a call. A call request message is transmitted, and the line connection control device outputs a call that is output from the exchange to the subscriber line from the call request message received from the subscriber radio device or when an incoming call to the subscriber occurs. Subscriber identification information extracting means for extracting subscriber identification information from a signal, a telephone number of a specific destination requiring an emergency, the number of reserved radio channels used for an emergency call, and a radio subscriber system The number of all wireless channels that can be set by the system is registered in advance, the first storage means for storing the number of currently used wireless channels, the subscriber identification information for identifying the subscriber, and the priority in connection of the wireless channels Second storage means preliminarily registered in association with priority connection class data indicating the order, the subscriber identification information, the call duration of a call during a call in association with the subscriber identification information, and priority connection Third storage means for storing identification information indicating a class and identification information indicating whether the call is an emergency call or a non-emergency call; the number of reserved channels stored in the first storage means; and all radio channels If the radio channel is in a congested state, it is determined whether or not the radio channel is in a congested state based on the data of the number and the number of radio channels currently in use. The call is an emergency call depending on whether or not the telephone number dialed based on the call request matches the telephone number of a specific destination requiring emergency registered in the first storage means. A first determination unit that registers the determination result in the third storage unit, and a subscriber who has received an incoming call or a call request extracted by the subscriber identification information extraction unit. Based on the subscriber identification information, the priority connection class data of the subscriber is retrieved from the second storage means, the priority connection class of the subscriber who requested the call is determined, and the determination result is stored in the third storage. The second determination means registered in the means, and when the radio channel is in a congested state, when there is a new incoming call to the subscriber, the storage contents of the third storage means are searched, Based on the search results, this incoming call When there is a non-emergency call that has a lower priority connection class than the call subscriber and does not require an emergency, one of the non-emergency calls is selected as a call to be disconnected and assigned to the call to be disconnected The radio channel is forcibly disconnected, the disconnected radio channel is assigned to the incoming call, and the priority connection class is lower than that of the current incoming call subscriber and is a non-emergency call among calls already in a call And a radio channel connection control means for controlling to reject the incoming call when there is no call from the subscriber.

  A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a public switched telephone network switch via a subscriber line; and the subscriber line In a wireless subscriber system having a line connection control device for performing connection control, the line connection control device associates priority connection class data indicating a priority connection order with subscriber identification information for specifying a subscriber. In advance, the telephone number of a specific destination requiring urgent registration is registered in advance, and an emergency call that is an urgent call is not assigned to a subscriber's call in a normal operation state. A plurality of reserved radio channels to be used for this purpose, and when the radio channel is in a congested state, when a call request is newly issued from the subscriber, If there is a non-emergency call that has a lower priority connection class than the calling subscriber and does not require an emergency, select one of the non-emergency calls as a call to be disconnected and assign it to the call to be disconnected Forcibly disconnecting the wireless channel being assigned, and assigning the disconnected wireless channel to the call for which the call request has been made. If there is no subscriber call that is a non-emergency call that is low and does not require urgent, once one of the reserved radio channels is assigned to the call that requested the call; If the call with the call request is an emergency call, the call is continued and assigned to one of the calls with the lowest priority connection class that is a non-emergency call among the calls currently being talked to Forcibly disconnect and release the given radio channel, If the call with the call request is a non-emergency call, the assigned reserved radio channel is forcibly disconnected and released, so even if the radio channel is congested When there is a call request from a subscriber who calls an urgent destination, or when there is a non-emergency call with a priority connection higher than the non-emergency call currently being talked on It is possible to connect with priority over other subscribers.

  A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In a wireless subscriber system having a line connection control device that performs connection control of the line connection control device, when the wireless channel is in a congested state, the line connection control device, when there is a new incoming call to the subscriber, If there is a non-emergency call that has a lower priority connection class than the current call subscriber and is not urgent, among the calls that are already in a call, select one of the non-emergency calls as a call to be disconnected , Forcibly disconnecting the radio channel assigned to the call to be disconnected, assigning the disconnected radio channel to the incoming call, and preferentially connecting to the incoming call subscriber of the current call class If there is no subscriber call that is low and a non-emergency call, the incoming call is rejected, so even if the radio channel is congested, the priority connection is higher than the non-emergency call that is currently in a call. When an incoming call is made to a subscriber with a higher rank, it is possible to connect with priority over other subscribers during a call.

  According to a second aspect of the present invention, there is provided between a subscriber radio apparatus installed in a subscriber's home and connected to a telephone, and a subscriber radio apparatus connected to a public switched telephone network switch via a subscriber line. In a line connection control device of a wireless subscriber system having a set wireless channel and a line connection control device for controlling connection of the subscriber line, the line connection control device has priority connection class data indicating a priority connection order. And the subscriber identification information for identifying the subscriber is registered in advance and the telephone number of the specific destination requiring urgent registration is registered in advance, and the radio channel is in a congested state. An emergency call that is a call having a high and low priority connection class and an urgency level for a call that is currently being communicated when a call request from the subscriber is newly received or an incoming call is made to the subscriber. And performing connection processing for said call request or call based on whether the determination Luke.

  According to the second aspect of the present invention, between the subscriber wireless device installed in the subscriber's home and connected to the telephone, and the subscriber wireless device connected to the exchange of the public switched telephone network via the subscriber line In a line connection control apparatus of a wireless subscriber system having a wireless channel set to the line and a line connection control apparatus for controlling connection of the subscriber line, the line connection control apparatus indicates a priority connection class indicating a priority connection order. When data and subscriber identification information for specifying a subscriber are registered in advance and the telephone number of a specific destination requiring urgent registration is registered in advance, and the radio channel is in a congested state In this case, when there is a new call request from the subscriber or an incoming call to the subscriber, an emergency call which is a call having a high and low priority connection class and urgency with respect to the call currently being communicated Since the connection process for the call request or the call is performed based on the determination of whether or not there is a call, even if the radio channel is in a congested state, a call from a subscriber who calls an urgent destination When a request (emergency call) is made or an incoming call is made to a subscriber to be preferentially connected, a radio channel is surely allocated for an emergency call or a call of a subscriber to be preferentially connected. It is possible to accommodate normal calls (non-emergency calls) and emergency calls and subscriber calls to be preferentially connected without being distinguished. For this reason, channel resources can be used effectively.

  Further, a subscriber wireless device installed in a subscriber's house and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a public switched telephone network switch via a subscriber line, and the subscription In a line connection control apparatus of a wireless subscriber system having a line connection control apparatus that performs connection control of a subscriber line, the line connection control apparatus is configured to specify priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information is registered in advance, and the telephone number of a specific destination that requires urgent registration is registered in advance. When a plurality of reserved radio channels to be used for emergency calls, which are necessary calls, are provided and the radio channel is in a congested state, when a new call request is issued from the subscriber If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and is not urgent among calls that are already in a call, select one of the non-emergency calls as a call to be disconnected , Forcibly disconnecting the radio channel assigned to the call to be disconnected, assigning the disconnected radio channel to the call for which the call request has been made, If there is no subscriber call that is a non-emergency call that has a lower priority connection class than the subscriber and does not require emergency, one of the plurality of reserved radio channels is assigned to the call request. If the call with the call request is an emergency call, the call is continued, and the currently active call is a non-emergency call and the most preferred connection class is Strengthen the radio channel assigned to one of the lower calls If the call with the call request is a non-emergency call, the reserved radio channel once allocated is forcibly disconnected and released. Can do.

  Further, in the line connection control apparatus of the wireless subscriber system, the line connection control apparatus is configured such that when the wireless channel is in a congested state and a new incoming call is made to the subscriber, If there is a non-emergency call that has a lower priority connection class than the current called subscriber and is not urgent, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnecting the radio channel assigned to the incoming call, assigning the disconnected radio channel to the incoming call, and having a priority connection class lower than that of the current incoming call subscriber among calls already in progress, and If there is no subscriber call that is a non-emergency call, the incoming call can be rejected.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a line connection control device of a wireless subscriber system having a line connection control device for controlling connection of a subscriber line, the subscriber wireless device is a subscriber to the line connection control device when a subscriber makes a call. A call request message including identification information is sent out, and the line connection control device sends a call request message received from the subscriber radio device or when an incoming call to the subscriber occurs from the exchange to the subscriber line. Subscriber identification information extracting means for extracting subscriber identification information from a call signal output to the telephone, and a telephone number of a specific destination requiring emergency and an emergency call which is a call requiring emergency About the number of radio channels and the total number of radio channels that can be set by the radio subscriber system are registered in advance, the first storage means for storing the number of radio channels currently in use, and the subscriber identification that identifies the subscriber Second storage means in which information and priority connection class data indicating priority in connection of wireless channels are associated with each other in advance, subscriber identification information, and a call in association with the subscriber identification information A third storage means for storing the call duration of the call, the identification information indicating the priority connection class, and the identification information indicating whether the call is an emergency call or a non-emergency call, and is stored in the first storage means It is determined whether or not the radio channel is congested based on the data of the number of reserved channels, the total number of radio channels, and the number of radio channels currently in use, and the radio channel is congested. In this case, if there is a call request, does the telephone number dialed based on the call request match the telephone number of a specific destination requiring emergency registered in the first storage means? Whether the call is an emergency call or not, and a first determination unit that registers the determination result in the third storage unit, and the subscriber identification information extraction unit extracts the determination result. Based on the subscriber identification information of the subscriber who requested the call, identification information indicating the priority connection class of the subscriber is retrieved from the second storage means, and the priority connection class of the subscriber who has requested the call is determined. , The second determination means for registering the determination result in the third storage means, and when the wireless channel is in a congested state, when there is a new call request from the subscriber, the third determination means Search the storage contents of the storage means, and based on the search results Therefore, if there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require an emergency among calls that are already in a call, one of the non-emergency calls is set as a call to be disconnected. Select to forcibly disconnect the radio channel assigned to the call to be disconnected, assign the disconnected radio channel to the call for which the call request has been made, If there is no subscriber call that is a non-emergency call that has a lower priority connection class than the calling subscriber and is not urgent, one of the plurality of reserved radio channels is called the calling The call is temporarily assigned to the requested call, and if the call with the call request is determined to be an emergency call by the first determination means, the call is continued and Non-emergency call and lowest priority connection class Forcibly disconnecting and releasing the radio channel assigned to any of the above, and when the call having the call request is determined by the first determination means to be a non-emergency call, It may be configured to have radio channel connection control means for controlling to forcibly disconnect and release the reserved radio channel once allocated.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a line connection control device of a wireless subscriber system having a line connection control device for controlling connection of a subscriber line, the subscriber wireless device is a subscriber to the line connection control device when a subscriber makes a call. A call request message including identification information is sent out, and the line connection control device sends a call request message received from the subscriber radio device or when an incoming call to the subscriber occurs from the exchange to the subscriber line. Subscriber identification information extracting means for extracting subscriber identification information from the call signal output to the telephone number of a specific destination requiring emergency and the number of reserved radio channels used for emergency calls, And a first storage means for storing the number of all wireless channels settable by the wireless subscriber system in advance, storing the number of currently used wireless channels, subscriber identification information for identifying the subscriber, and wireless channels A second storage means preliminarily registered in association with the priority connection class data indicating the priority order of the connection, the subscriber identification information, and the call of the call during the call in association with the subscriber identification information Third storage means for storing time, identification information indicating a priority connection class, and identification information indicating whether the call is an emergency call or a non-emergency call, and the number of reserved channels stored in the first storage means Determining whether or not the radio channel is congested based on the data of the total number of radio channels and the number of radio channels currently in use, and when the radio channel is in a congested state, Depending on whether or not the telephone number dialed based on the call request when there is a call request matches the telephone number of a specific destination requiring urgent registration registered in the first storage means A first determination means for determining whether the call is an emergency call and registering the determination result in the third storage means; and an incoming call or a call extracted by the subscriber identification information extraction means Based on the subscriber identification information of the requested subscriber, the priority connection class data of the subscriber is retrieved from the second storage means, the priority connection class of the subscriber who has requested the call is determined, and the determination The second determination means for registering the result in the third storage means, and when the incoming call to the subscriber is newly made when the radio channel is congested, the third storage means Search the stored contents and based on the search result, already in a call If there is a non-emergency call that has a lower priority connection class than the current call subscriber and does not require an emergency call, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnects the radio channel assigned to the target call, assigns the disconnected radio channel to the incoming call, and has a lower priority connection class than the current incoming call subscriber among calls that are already in a call And, when there is no subscriber's call which is a non-emergency call, it can be configured to have radio channel connection control means for controlling to reject the incoming call.

  A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In a line connection control apparatus of a wireless subscriber system having a line connection control apparatus for performing connection control, the line connection control apparatus includes priority connection class data indicating a priority connection order and a subscriber for specifying a subscriber. Calls that require urgent information and are registered in advance in association with identification information, and are registered in advance with the telephone number of a specific destination that requires urgentness, and are not assigned to subscriber calls in normal operating conditions. If there are a plurality of reserved radio channels used for an emergency call, and the radio channel is in a congested state, when a new call request is made from the subscriber, If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require urgent calls among the busy calls, select one of the non-emergency calls as a call to be disconnected, The radio channel assigned to the call to be disconnected is forcibly disconnected, the disconnected radio channel is assigned to the call for which the call has been requested, and the current call subscription is included in the calls that are already in a call If there is no subscriber call that is a non-emergency call that has a lower priority connection class than the caller and that does not require an emergency, the call request is issued for one of the plurality of reserved radio channels Once assigned to a call, if the call with the call request is an emergency call, the call is continued, and it is a non-emergency call among the currently active calls and has the lowest priority connection class Force the radio channel assigned to one of the calls When the call with the call request is a non-emergency call, the assigned reserved radio channel is forcibly disconnected and released. Even when there is congestion, when there is a call request from a subscriber who calls an emergency partner, or there is a non-emergency call with a higher priority order than the non-emergency call that is currently in a call In addition, it is possible to connect with priority over other subscribers during a call.

  A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In the line connection control device of a wireless subscriber system having a line connection control device that performs connection control of the wireless connection system, the line connection control device has a new incoming call to the subscriber when the wireless channel is congested. If there is a non-emergency call that has a lower priority connection class than the current called subscriber and is not urgent among calls that are already in a call, one of the non-emergency calls is subject to disconnection. Select the call, forcibly disconnect the radio channel assigned to the call to be disconnected, assign the disconnected radio channel to the incoming call, and the current incoming call among calls already in a call Subscriber When the priority connection class is low and there is no call of a subscriber who is a non-emergency call, the incoming call is rejected. Therefore, even if the radio channel is in a congested state, the non-emergency call currently in a call When there is an incoming call to a subscriber with a higher priority connection order, it is possible to connect with priority over other subscribers during a call.

  According to a third aspect of the present invention, there is provided between a subscriber radio apparatus installed in a subscriber's house and connected to a telephone, and a subscriber radio apparatus connected to a switch of a public switched telephone network via a subscriber line. In a line connection control device of a wireless subscriber system having a set wireless channel and a line connection control device for controlling connection of the subscriber line, the line connection control device has priority connection class data indicating a priority connection order. And the subscriber identification information for specifying the subscriber is registered in advance, and the telephone number of the specific destination requiring urgent registration is registered in advance, and the radio channel is in a congested state. An emergency call that is a call having a high and low priority connection class and urgency for a call that is currently in a call when a call request is newly received from the subscriber or an incoming call is made to the subscriber. A computer recording a program for causing the computer to execute a function of the line connection control device of the wireless subscriber system, wherein connection processing for the call request or call is performed based on whether or not the call is made The gist is a readable recording medium.

  According to the invention described in claim 3, between the subscriber radio apparatus installed in the subscriber's house and connected to the telephone, and the subscriber radio apparatus connected to the exchange of the public switched telephone network via the subscriber line In a line connection control device of a wireless subscriber system having a wireless channel set in the network and a line connection control device for controlling connection of the subscriber line, the line connection control device indicates a priority connection class indicating a priority connection order. When data and subscriber identification information for specifying a subscriber are registered in advance and the telephone number of a specific destination requiring urgent registration is registered in advance, and the radio channel is in a congested state In this case, when there is a new call request from the subscriber or an incoming call to the subscriber, an emergency call that is a call having a high and low priority connection class and an urgency with respect to the call currently being communicated A computer can read a program for causing a computer to execute the function of the line connection control device of the wireless subscriber system, wherein connection processing for the call request or call is performed based on whether or not there is a call. Since the program recorded on this recording medium is read into the computer system and executed, the subscriber who calls the other party who needs an emergency even if the radio channel is congested can be obtained. When there is a call request (emergency call) from a subscriber, or when there is an incoming call to a subscriber to be preferentially connected, a radio channel is used for an emergency call or a call of a subscriber to be preferentially connected. Can be allocated without any distinction between normal calls (non-emergency calls) and emergency calls and subscriber calls to be preferentially connected. Kill. For this reason, channel resources can be used effectively.

  Even when the wireless channel is congested, there is a call request (emergency call) from a subscriber who calls an urgent destination, or there is an incoming call to a subscriber to be preferentially connected In some cases, radio channels can be allocated for emergency calls and subscriber calls to be preferentially connected.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A schematic configuration of a wireless subscriber system according to an embodiment of the present invention is shown in FIG. In the figure, an exchange 12 provided in a public switched telephone network 10 includes subscriber lines A and B, telephone lines 30A, 30B,... ,It is connected to the.

  The wireless subscriber system 20 includes an access controller (AC) 22 that is connected to the exchange 12 via a subscriber line, and a radio that is connected to the access controller (AC) 22 and is set between the subscriber wireless devices. It has a radio base station (BS) 24 that performs channel connection control, and subscriber radio devices SU-A (user A), SU-B (user B),... As subscriber terminals.

  The subscriber radio apparatuses SU-A, SU-B,... Are installed in the subscriber premises, and the subscriber radio apparatuses SU-A, SU-B,. , Each connected. Here, the user B is a subscriber who makes a call to a party requiring emergency, or a subscriber having a higher priority connection class, that is, a higher priority connection class, and the user A has a lower priority connection class than the subscriber B, It is assumed that the subscriber is talking as an emergency call. Further, the subscriber wireless device SU-A installed in the subscriber A's home is connected to the subscriber line A, and the subscriber wireless device SU-B installed in the subscriber B's home is connected to the subscriber line B. As described above, the subscriber line and the subscriber radio apparatus have a one-to-one correspondence.

  Next, specific configurations of the access controller (AC) 22 and the radio base station 24 are shown in FIG. In the figure, an access controller (AC) 22 detects a ringing signal (Ring) from the exchange 12 and extracts a subscriber information included in the ringing signal. When it occurs, it is determined whether to accept or reject the connection of the call, and the priority determination processing unit 42 that manages the radio channel resources, and the priority connection class in the radio channel connection for each subscriber, Subscriber priority connection class database 44 registered in advance in association with the specified subscriber identification information, and the emergency telephone number and radio channel number (reserved radio used for an emergency call) that is the telephone number of the other party requiring emergency (Each data of the number of channels, the total number of radio channels that can be set by the radio subscriber system, and the number of radio channels in use)) Number / radio channel number storage device 46, and when there is a call request, the telephone number dialed based on the call request is monitored, and the telephone number is registered as a specific party requiring emergency It has a dial information monitor and an emergency / non-emergency call determination unit 48 for determining whether or not the call is an emergency call based on whether or not it matches the previous telephone number.

  The call signal detector 40 is the subscriber identification information extracting means of the present invention, the priority determination processing section 42 is the second determining means of the present invention, and the subscriber priority connection class database 44 is the second storage means of the present invention. The emergency telephone number / wireless channel number storage device 44 is a first storage means of the present invention, and the emergency telephone number / wireless channel number storage device 46 is a first storage means of the present invention. The non-emergency call determination unit 48 corresponds to the first determination unit of the present invention.

  The radio base station 24 also includes a radio transmission / reception circuit 50 that transmits / receives control messages and voice information related to connection / disconnection of radio channels to / from subscriber wireless devices, and a message protocol that processes control messages transmitted / received to / from subscriber wireless devices. The processing unit 52, information related to a call during a call, specifically, for all calls during a call (busy call), subscriber identification information for identifying a subscriber of the call during a call, and the subscription Call time management information 54 for managing and storing call time, priority connection class data, identification information for identifying emergency call or non-emergency call, and call time of a call during a call. And a time measuring device 56 such as a timer (or a clock) that outputs to the call information management database 54.

  Although the emergency telephone number / radio channel number storage device 46 is provided in the access controller (AC) 22 in the present embodiment, it may be provided in the radio base station 24. The access controller (AC) 22 and the radio base station 24 correspond to the line connection control device of the present invention, and the call information management database 54 during call corresponds to the third storage unit of the present invention. The message protocol processing unit 52 includes subscriber identification information extracting means of the present invention for extracting subscriber identification information from a call message at the time of calling. The priority determination processing unit 42 and the message protocol processing unit 52 correspond to the wireless channel connection control means of the present invention.

  An example of the control operation when the radio channel in the radio subscriber system 20 having the above configuration is in a congested state will be described with reference to FIGS. 3 and 4 show the priority connection processing when an incoming call is made to the subscriber radio apparatus as the subscriber terminal, and FIG. 5 shows the control sequence at that time. In the above configuration, when the subscriber line A and the user A (telephone 30A) are talking, and an incoming call to the user B occurs in this state, a ringing signal (Ring) is sent from the exchange 12 via the subscriber line B. ) Is output. This call signal is detected by the call signal detection unit 40, and the call signal detection unit 40 extracts subscriber identification information unique to the subscriber from the call signal (in this embodiment, PSID (Personal Station ID) corresponds). Then, the subscriber identification information is output to the priority determination processing unit 42 (step 100).

  Next, the priority determination processing unit 42 searches the subscriber priority connection class database 44 based on the subscriber identification information, and the priority of the called subscriber wireless device (subscriber wireless device SU-B in the present embodiment). The connection order, that is, the priority connection class is obtained, and the determination result is registered in the call information management database 54 during a call (step 102).

  In the call information management database 54 during a call, the subscriber identification information of the call in progress from the message protocol processing unit 52, and data indicating the call duration of each call (subscriber radio apparatus) in the call from the timing device 56. And the subscriber identification information and the call duration of the call specified by the subscriber identification information are stored in association with each other. In addition, the call in-call information management database 54 provides priority connection class data for each call in progress and identification information indicating whether the call is an emergency call or a non-emergency call through the priority determination processing unit. The data is received from the class database 44, the dial information monitor and the emergency / non-emergency call determination unit 48, and stored in association with the subscriber identification information.

  The dial information monitor and emergency / non-emergency call determination unit 48 determines whether or not the radio channel resource is available, in other words, whether or not the radio channel is congested (step 104). The dial information monitor and emergency / non-emergency call determination unit 48 can be set by the contents stored in the emergency telephone number / radio channel number storage device 46, that is, the number of reserved radio channel channels used for emergency calls and the radio subscriber system. Refer to each data of the total number of radio channels and the number of currently used radio channels, and if the number of used radio channels is equal to or greater than the value obtained by subtracting the reserved radio channel number from the total radio channel number It is determined that the state is congested. Otherwise, it is determined that the state is not congested. If the radio channel resource is available, one of the available channels is received via the subscriber line B (in this embodiment, for example, to the subscriber B's subscriber radio device SU-B). (Step 120), the process proceeds to step 118.

  On the other hand, if it is determined in step 104 that there is no available wireless channel resource, that is, the wireless channel is in a congested state, the priority determination processing unit 42 searches the call information management database 54 during a call and is busy. Among the calls, a call having a lower priority connection class than the current called subscriber and a non-emergency call is extracted (step 106). Next, the priority order determination processing unit 42 belongs to a priority connection class lower than the priority connection class of the user B (subscriber radio apparatus SU-B) that is the call destination and is a call during a call of a subscriber that is a non-emergency call. (Step 108), and the subscribers belonging to the priority connection class lower than the priority connection class of the user B (subscriber radio apparatus SU-B) that is the call destination and the non-emergency call If it is determined that there is no call in progress, the process is terminated without responding to the incoming call (step 122).

  In addition, the priority determination processing unit 42 belongs to a priority connection class lower than the priority connection class of the user B (subscriber radio apparatus SU-B) that is a call destination and is a call during a call of a subscriber that is a non-emergency call. If it is determined that there is a call, a plurality of subscribers who are in a non-emergency call and belong to a priority connection class lower than the priority connection class of the user B (subscriber radio apparatus SU-B) that is a call destination. The call with the longest talk time is selected as the call to be disconnected, and the call is disconnected from the occurrence of the call that is preferentially connected to the selected call to be disconnected (call by the subscriber radio apparatus SU-A in this embodiment). A special tone for informing the user that the operation has been performed is transmitted for a predetermined time (steps 110 and 112). Next, the selected call in progress is disconnected and a radio channel resource is reserved (step 114).

  An end signal (on-hook) is output to the subscriber line A, and a radio channel disconnect message is output from the message protocol processing unit 52 to the subscriber radio apparatus SU-A via the radio transmission / reception circuit 50. The subscriber radio apparatus SU-A that has received the radio channel disconnect message generates a busy tone and sends it to the telephone 30A of the user A to inform the user A that the radio channel has been disconnected. User A places the handset of telephone 30A (on-hook), and the call ends. Next, the subscriber radio apparatus SU-A sends a radio channel disconnection completion message to the radio transmission / reception circuit 50. In the radio base station 24, the message protocol processing unit 52 receives the radio channel disconnection completion message from the radio transmission / reception circuit 50 and receives the radio channel. Perform the cutting process.

  Further, from the radio base station 24 side, a message protocol processor 52 sends an incoming call (Paging) message to the subscriber radio apparatus SU-B via the radio transmission / reception circuit 50, and the subscriber radio apparatus SU-B In order to accept an incoming call, a link channel establishment request message including subscriber identification information (for example, PSID) is transmitted to the radio base station 24 side. This PSID (Personal Station ID) is a terminal identification value fixedly assigned to each subscriber.

  Further, the priority determination processing unit 42 allocates the reserved radio channel resource to the incoming call to the user B (subscriber radio apparatus SU-B), and sends the link channel assignment message to the subscriber radio apparatus SU-B which is an incoming call terminal. (Step 116). Next, normal incoming call processing, that is, call setup and call message transmission are performed between the wireless base station 24 and the subscriber wireless device SU-B, which is the called subscriber terminal, and the subscriber wireless device SU-B A ringing signal (Ring) is output to the telephone 30B of the user B (step 118). Thereafter, a response notification (off-hook) is made from the telephone 30B of the user B to the subscriber radio apparatus SU-B, and a connection message is transmitted from the subscriber radio apparatus SU-B to the radio base station 24 side, and from the access controller 22 A response notification (off-hook) is sent to the subscriber line B, and the subscriber line B and the telephone 30B of the user B shift to a call state.

  Next, another example of the control operation when the wireless channel in the wireless subscriber system 20 is in a congested state will be described with reference to FIGS. 6 to 8 show connection of a radio channel when a normal call, that is, a non-emergency call or an emergency call is generated from a subscriber radio device as a subscriber terminal in a state where the radio channel is congested. The cutting control is shown, and FIG. 9 shows the control sequence at that time.

  In the above configuration, the subscriber line A and the user A (telephone 30A) are currently talking, the user B raises the handset of the telephone 30B, the two-wire analog line is off-hook, and the call notification is sent to the subscriber radio apparatus. Output to SU-B. When the subscriber radio apparatus SU-B detects the call notification (off-hook), the subscriber radio apparatus SU-B as the calling terminal is notified to the radio transmission / reception circuit 50 of the radio base station 24 (this embodiment). A link channel establishment request message including PSID) is output. This PSID (Personal Station ID) is a terminal identification value fixedly assigned to each subscriber.

  The radio transmission / reception circuit 50 of the radio base station 24 receives the link channel establishment request message and sends it to the message protocol processing unit 52 (step 200). The message protocol processing unit 52 extracts the subscriber identification information (PSID) of the subscriber radio apparatus SU-B from the link channel establishment request message, and uses the subscriber identification information for the call information management database 54 during call and priority determination processing. To the unit 42.

  The priority determination processing unit 42 searches the subscriber priority connection class database 44 based on the subscriber identification information, and the priority of the calling subscriber wireless device (subscriber wireless device SU-B in the present embodiment), That is, a priority connection class is obtained (step 202). On the other hand, in the call information management database 54 during a call, subscriber identification information of a call in progress from the message protocol processing unit 52, and data indicating the call duration of each call (subscriber radio apparatus) in a call from the timing device 56. And the subscriber identification information and the call duration of the call specified by the subscriber identification information are stored in association with each other. In addition, the call in-call information management database 54 provides priority connection class data for each call in progress and identification information indicating whether the call is an emergency call or a non-emergency call through the priority determination processing unit. The data is received from the class database 44, the dial information monitor and the emergency / non-emergency call determination unit 48, and stored in association with the subscriber identification information.

  Next, the dial information monitor and emergency / non-emergency call determination unit 48 determines whether or not the channel resource is free, that is, whether or not the radio channel is congested (step 204). That is, the dial information monitor and emergency / non-emergency call determination unit 48 stores the contents stored in the emergency telephone number / radio channel number storage device 46, that is, the number of reserved radio channel channels used for emergency calls and the radio subscriber system. Refer to the data of the total number of radio channels that can be set and the number of radio channels currently in use, and if the number of radio channels in use is equal to or greater than the value obtained by subtracting the number of reserved radio channels from the total number of radio channels The channel is determined to be in a congested state, otherwise it is determined not to be in a congested state.

  If the determination in step 204 is affirmed, that is, if the radio channel is not congested, an empty channel is obtained in step 230 (an empty channel within the range of the number of channels obtained by subtracting the number of reserved radio channels from the total number of radio channels). One of these is assigned to the call requesting the call, then a link channel assignment message is sent to the subscriber terminal requesting the call (step 236), and the process is terminated.

  On the other hand, if the determination in step 204 is negative, that is, if the radio channel is in a congested state, in the next step 206, the priority determination processing unit 42 searches the busy call information management database 54 and performs this search. From the result, it is determined whether or not there is a call of a subscriber whose priority connection class is lower than that of the current calling subscriber and is a non-emergency call among calls in progress. If this determination is affirmative, the process proceeds to step 238.

  On the other hand, if the determination in step 206 is negative, that is, the call of the subscriber whose priority connection class is lower than that of the current calling subscriber and is a non-emergency call among calls in which the priority determination processing unit 42 is busy. If it is determined that there is not, the priority order determination processing unit 42 refers to the contents stored in the emergency telephone number / wireless channel number storage device 46 via the dial information monitor and the emergency / non-emergency call determination unit 48, and reserve wireless communication. It is determined whether or not there is an empty channel (step 208). If the determination in step 208 is negative, a link channel assignment rejection message is sent to the subscriber wireless device SU-B requesting the call, and the execution of this process is terminated (step 232).

  On the other hand, if the determination at step 208 is affirmative, one of the reserved radio channels is assigned to the call requesting call at step 210, and the subscriber radio device SU-B requesting this call is assigned. A link channel assignment message is transmitted to the terminal (step 212). After the allocation of the link channel, the synchronous burst signal is transmitted / received between the base station 24 and the subscriber radio unit SU-B, and then the base station side is set in the asynchronous balanced mode from the subscriber radio unit SU-B to the base station 24 side. A SABM (Set Asynchronous Balanced Mode) command for operation is transmitted. Thereafter, a UA (Unnumbered Acknowledge) response to report that the SABM command is accepted from the base station 24 is sent to the subscriber radio apparatus SU-B. As a result, a data link is established between the base station 24 side and the subscriber radio unit SU-B.

  Next, in step 214, call setting processing is performed. That is, first, a call setup message is transmitted from the subscriber radio apparatus SU-B to the base station 24 side, and a call origination request is made. On the other hand, on the base station 24 side, the subscriber data of the caller is checked. Next, a call message and a response message are sent from the base station 24 to the subscriber radio unit SU-B, and then a call notification (off-hook) is sent to the subscriber line B by the base station 24 and the access controller 22. As a result, a dial tone is output from the subscriber line B side to the telephone 30B of the user B.

  When the user B dials, a DTMF tone (or pulse) is transmitted from the telephone 30B to the subscriber line B as dial information. At this time, the dial information monitor and emergency / non-emergency call determination unit 48 in the access controller 22 monitors the last digit for each digit of the telephone number by the DTMF tone (step 216), and stores the emergency telephone number / radio channel number storage device. It is checked whether the telephone number registered as an emergency telephone number corresponds to the stored contents of 46, and it is determined whether the call made by the user B is an emergency call (step 218).

  If the determination in step 218 is negative, that is, if it is determined that the call made by user B is not an emergency call, the wireless channel is disconnected in step 234, and this process ends. If the determination in step 218 is affirmative, that is, if the call by user B is determined to be an emergency call, the current call is registered as an emergency call in the busy call information management database 54, and this call When the last dial operation is completed to continue the call, a ringing tone is sent from the subscriber line B side to the telephone 30B of the user B, and a call state is entered (step 105).

  Next, the priority determination processing unit 42 searches the call information management database 54 during a call, and disconnects a call that is a non-emergency call among calls in progress and has the lowest priority connection class and the longest call time. The selected call to be disconnected is reported to the message protocol processing unit 52 (step 222). In the present embodiment, a call by user A connected to subscriber line A is selected as a call to be disconnected. Next, a special tone indicating that the radio channel is disconnected due to the occurrence of an emergency call to both parties of the call to be disconnected, that is, the user A side and the subscriber line A side, more specifically, the message protocol. The data is output from the processing unit 52 (step 224).

  Next, disconnection processing of the radio channel set between the subscriber line A and the subscriber radio unit SU-A is performed (steps 226 and 228). That is, an end signal (on-hook) is output from the base station 24 side to the subscriber line A, and at the same time, a disconnect message is sent to the subscriber radio unit SU-A (step 226). On the other hand, the subscriber radio apparatus SU-A sends a release message for releasing the call to the base station 24 side, and simultaneously sends a busy tone to the telephone 30A of the user A. Thereafter, a release completion message is sent from the base station 24 side to the subscriber radio apparatus SU-A, and a DISC (DISConnect) command is sent from the subscriber radio apparatus SU-A to the base station 24 side (step 228).

  On the other hand, a UA (Unnumbered Acknowledge) response reporting that the DISC command is accepted from the base station 24 side is sent to the subscriber radio apparatus SU-A. As a result, the radio channel is released. As a result, the number of reserved radio channels prepared for the emergency call is restored. That is, the state returns to the state where all reserved radio channels are secured. When the user A is on-hook in response to the busy tone, the telephone set A outputs an end signal (on-hook) to the subscriber wireless device SU-A.

  On the other hand, if it is determined in step 206 in FIG. 6 that the priority connection class is lower than the current calling subscriber and there is a call of a subscriber that is a non-emergency call in step 238, priority is given in step 238. The rank determination processing unit 42 searches the call information management database 54 during a call, and has a lower priority connection class than the current call subscriber during a call and has the longest call time among calls of subscribers that are non-emergency calls. Is selected as the call to be disconnected, and is reported to the message protocol processing unit 52.

  Next, the radio channel assigned to the call to be disconnected is reserved for the current call, and a special sound that notifies that the call is disconnected due to the occurrence of a call that is preferentially connected to both parties of the call to be disconnected is fixed. The time is transmitted (steps 240 and 242). After a certain period of time, the line on the exchange side of the call to be disconnected is hooked (step 244), and the wireless channel set for the subscriber wireless device of the call to be disconnected is disconnected from the wireless base station 24 (step 244). Step 246). Then, the radio channel released by this disconnection process is allocated for the current call (step 248), a link channel allocation message is sent to the subscriber radio apparatus requesting the current call, and this process is executed. End (step 250).

  1 to FIG. 12 is set between the subscriber wireless device installed in the subscriber's home and connected to the telephone, and the subscriber wireless device connected to the switch of the public switched telephone network via the subscriber line. In a line connection control device of a wireless subscriber system having a wireless channel and a line connection control device that performs connection control of the subscriber line, the line connection control device includes priority connection class data indicating a priority connection order, and In the case where the subscriber identification information for specifying the subscriber is registered in advance in association with the telephone number of the specific destination requiring urgent registration in advance, and the radio channel is in a congested state, When there is a new call request from the subscriber or an incoming call to the subscriber, it is an emergency call that is a call having a high and low priority connection class and an urgency for the call currently being talked A computer-executed program for realizing a function of a line connection control device of a wireless subscriber system, wherein connection processing for the call request or call is performed based on determination of whether or not The function of the line connection control device of the wireless subscriber system may be realized by recording the program on a readable recording medium, causing the computer system to read and execute the program recorded on the recording medium.

  Here, the “computer system” includes a case where it is realized as an embedded system using a microprocessor or the like, or a case where it is realized as hardware such as an OS or a peripheral device. The “computer-readable recording medium” refers to a portable medium such as a floppy disk and a magneto-optical disk, and a storage device such as a ROM, RAM, and hard disk built in the computer system.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  As described above, according to the wireless subscriber system according to the embodiment of the present invention, the subscriber wireless device installed in the subscriber premises and connected to the telephone, and the subscriber line is connected to the switch of the public switched telephone network. In a wireless subscriber system having a wireless channel connected to a subscriber wireless device and a line connection control device for controlling connection of the subscriber line, the line connection control device has priority connection Prioritized connection class data indicating the order and subscriber identification information for specifying a subscriber are registered in advance, and a telephone number of a specific destination requiring emergency is registered in advance, and a radio channel Is in a congested state, and when a new call request is received from the subscriber or an incoming call is made to the subscriber, the priority connection class of the priority connection class is high or low for the currently active call. Since the connection process for the call request or the incoming call is performed based on the determination of whether or not the call is an emergency call that has the characteristics, the other party that needs an emergency even if the radio channel is congested When there is an outgoing call request (emergency call) from a subscriber who calls, or when there is an incoming call to a subscriber to be preferentially connected, Therefore, it is possible to reliably allocate a radio channel and accommodate a normal call (non-emergency call) and an emergency call and a call of a subscriber to be preferentially connected without being distinguished. For this reason, channel resources can be used effectively.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a wireless subscriber system having a line connection control device for controlling connection of a subscriber line, the line connection control device receives priority connection class data indicating a priority connection order and subscriber identification information for specifying a subscriber. Correspondingly registering in advance and registering the telephone number of a specific destination that requires urgentness in advance, and in an ordinary operation state, it is not assigned to a subscriber's call, but is an urgent call that requires urgent If there are multiple reserved radio channels used for a call and the radio channel is in a congested state, when a new call request is received from the subscriber, a call that is already in a call If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require emergency, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnects the assigned radio channel, assigns the disconnected radio channel to the call for which the call request has been made, and prioritized connection class from the current calling subscriber among calls already in a call If there is no subscriber call that is a non-emergency call that is low and does not require an emergency, one of the reserved radio channels is temporarily assigned to the call that requested the call If the call with the call request is an emergency call, the call is continued, and is a non-emergency call among the calls currently being talked to and one of the calls with the lowest priority connection class Forcibly disconnect the assigned radio channel However, if the call with the call request is a non-emergency call, the reserved radio channel once allocated is forcibly disconnected and released, so that the radio channel is in a congested state. However, if there is a call request from a subscriber who calls an urgent destination, or if there is a non-emergency call with a priority connection higher than the non-emergency call currently being talked, It becomes possible to connect with priority over the subscriber during a call.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a wireless subscriber system having a line connection control device that performs connection control of a subscriber line, the line connection control device is configured to receive a new call to a subscriber when the wireless channel is congested. If there is a non-emergency call that has a lower priority connection class than the currently called subscriber and is not urgent among calls that are already in a call, select one of the non-emergency calls as a call to be disconnected Then, the radio channel assigned to the call to be disconnected is forcibly disconnected, and the disconnected radio channel is assigned to the incoming call. Preferred connection When there is no subscriber call that is low in non-emergency call and the call is rejected, the incoming call is rejected. When an incoming call is made to a subscriber with a high connection order, it is possible to connect with priority over other subscribers during a call.

  In addition, according to the wireless subscriber system according to the embodiment of the present invention, the subscriber wireless device installed in the subscriber's home and connected to the telephone is connected to the switch of the public switched telephone network via the subscriber line. In a line connection control device of a wireless subscriber system having a wireless channel set up with a subscriber wireless device and a line connection control device for controlling connection of the subscriber line, the line connection control device has priority connection The priority connection class data indicating the order to be registered and the subscriber identification information for specifying the subscriber are registered in advance, and the telephone number of the specific destination that is urgent is registered in advance. When the channel is in a congested state, when a call request is newly received from the subscriber or an incoming call is made to the subscriber, the priority connection class level of the call currently being talked and A computer executes the function of the line connection control device of the wireless subscriber system, which performs connection processing for the call request or the incoming call based on the determination of whether or not the call is an emergency call having acute Since the program for recording is recorded on a computer-readable recording medium, the program recorded on the recording medium is read into the computer system and executed, so that even if the wireless channel is in a congested state, When there is a call request (emergency call) from a subscriber who calls an emergency destination, or when there is an incoming call to a subscriber that should have priority connection, an emergency call or priority connection should be made A radio channel can be assigned to a subscriber's call reliably, and a normal call (non-emergency call) is separated from an emergency call and a subscriber call to be preferentially connected. It can be accommodated without. For this reason, channel resources can be used effectively.

  As described above, it is set between a subscriber wireless device installed in a subscriber's home and connected to a telephone, and a subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line. In a wireless subscriber system having a wireless channel and a line connection control device for controlling connection of the subscriber line, the line connection control device is configured to specify priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information is registered in advance, and the telephone number of a specific destination requiring urgent registration is registered in advance. When the wireless channel is congested, a new call is issued from the subscriber. When there is a request or an incoming call to the subscriber, based on the determination as to whether or not the call currently in a call is an emergency call having high and low priority connection classes and an urgent call. Therefore, even if the wireless channel is in a congested state, there is a call request (emergency call) from a subscriber who calls an emergency partner. Or when there is an incoming call to a subscriber to be preferentially connected, a radio channel can be allocated for an emergency call or a call of a subscriber to be preferentially connected. Calls) and emergency calls and subscriber calls to be preferentially connected can be accommodated without distinction. For this reason, channel resources can be used effectively.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a wireless subscriber system having a line connection control device for controlling connection of a subscriber line, the line connection control device receives priority connection class data indicating a priority connection order and subscriber identification information for specifying a subscriber. Correspondingly registering in advance and registering the telephone number of a specific destination that requires urgentness in advance, and in an ordinary operation state, it is not assigned to a subscriber's call, but is an urgent call that requires urgent If there are multiple reserved radio channels used for a call and the radio channel is in a congested state, when a new call request is received from the subscriber, a call that is already in a call If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and does not require emergency, select one of the non-emergency calls as a call to be disconnected, and Forcibly disconnects the assigned radio channel, assigns the disconnected radio channel to the call for which the call request has been made, and prioritized connection class from the current calling subscriber among calls already in a call If there is no subscriber call that is a non-emergency call that is low and does not require an emergency, one of the reserved radio channels is temporarily assigned to the call that requested the call If the call with the call request is an emergency call, the call is continued, and is a non-emergency call among the calls currently being talked to and one of the calls with the lowest priority connection class Forcibly disconnect the assigned radio channel However, if the call with the call request is a non-emergency call, the reserved radio channel once allocated is forcibly disconnected and released, so that the radio channel is in a congested state. However, if there is a call request from a subscriber who calls an urgent destination, or if there is a non-emergency call with a priority connection higher than the non-emergency call currently being talked, It becomes possible to connect with priority over the subscriber during a call.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a wireless subscriber system having a line connection control device that performs connection control of a subscriber line, the line connection control device is configured to receive a new call to a subscriber when the wireless channel is congested. If there is a non-emergency call that has a lower priority connection class than the currently called subscriber and is not urgent among calls that are already in a call, select one of the non-emergency calls as a call to be disconnected Then, the radio channel assigned to the call to be disconnected is forcibly disconnected, and the disconnected radio channel is assigned to the incoming call. Preferred connection When there is no subscriber call that is low in non-emergency call and the call is rejected, the incoming call is rejected. When an incoming call is made to a subscriber with a high connection order, it is possible to connect with priority over other subscribers during a call.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a line connection control device of a wireless subscriber system having a line connection control device for performing connection control of a subscriber line, the line connection control device is for specifying priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information is registered in advance, and the telephone number of a specific destination requiring urgent registration is registered in advance. When the wireless channel is in a congested state, a new call is issued from the subscriber. When there is a request or an incoming call to the subscriber, based on the determination as to whether or not the currently active call is an emergency call that is a call having high and low priority connection classes and urgency Therefore, even if the wireless channel is in a congested state, there is a call request (emergency call) from a subscriber who calls an emergency partner. Or when there is an incoming call to a subscriber to be preferentially connected, a radio channel can be allocated for an emergency call or a call of a subscriber to be preferentially connected. Calls) and emergency calls and subscriber calls to be preferentially connected can be accommodated without distinction. For this reason, channel resources can be used effectively.

  Further, a subscriber wireless device installed in a subscriber's house and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a public switched telephone network switch via a subscriber line, and the subscription In a line connection control apparatus of a wireless subscriber system having a line connection control apparatus that performs connection control of a subscriber line, the line connection control apparatus is configured to specify priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information is registered in advance, and the telephone number of a specific destination that requires urgent registration is registered in advance. When a plurality of reserved radio channels to be used for emergency calls, which are necessary calls, are provided and the radio channel is in a congested state, when a new call request is issued from the subscriber If there is a non-emergency call that has a lower priority connection class than the current calling subscriber and is not urgent among calls that are already in a call, select one of the non-emergency calls as a call to be disconnected , Forcibly disconnecting the radio channel assigned to the call to be disconnected, assigning the disconnected radio channel to the call for which the call request has been made, If there is no subscriber call that is a non-emergency call that has a lower priority connection class than the subscriber and does not require emergency, one of the plurality of reserved radio channels is assigned to the call request. If the call with the call request is an emergency call, the call is continued, and the currently active call is a non-emergency call and the most preferred connection class is Strengthen the radio channel assigned to one of the lower calls When the call with the call request is a non-emergency call, the reserved radio channel once allocated is forcibly disconnected and released. Even when the channel is congested, there is a call request from a subscriber who calls an urgent party, or there is a non-emergency call with a higher priority connection priority than the non-emergency call currently being talked to. In this case, it is possible to connect with priority over other subscribers during a call.

  Further, a subscriber wireless device installed in a subscriber's house and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a public switched telephone network switch via a subscriber line, and the subscription In a line connection control apparatus of a wireless subscriber system having a line connection control apparatus for controlling connection of a subscriber line, the line connection control apparatus newly receives an incoming call to a subscriber when the radio channel is congested. If there is a non-emergency call that has a lower priority connection class than the current call subscriber and does not require an urgent call among the calls that are already in a call, select one of the non-emergency calls. Select as the call to be disconnected, forcibly disconnect the radio channel assigned to the call to be disconnected, assign the disconnected radio channel to the incoming call, and among the calls already in progress, Incoming call If the priority connection class is lower than that of the subscriber and there is no subscriber call that is a non-emergency call, the incoming call is rejected, so even if the radio channel is congested, the When there is an incoming call to a subscriber whose priority connection order is higher than that of an emergency call, it is possible to connect with priority over other subscribers during a call.

  Further, a subscriber wireless device installed in a subscriber's home and connected to a telephone, a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line, and the subscription In a line connection control device of a wireless subscriber system having a line connection control device for performing connection control of a subscriber line, the line connection control device is for specifying priority connection class data indicating a priority connection order and a subscriber. Subscriber identification information is registered in advance, and the telephone number of a specific destination requiring urgent registration is registered in advance. When the wireless channel is in a congested state, a new call is issued from the subscriber. When there is a request or an incoming call to the subscriber, based on the determination as to whether or not the currently active call is an emergency call that is a call having high and low priority connection classes and urgency A program for causing a computer to execute the function of the line connection control device of the wireless subscriber system, which performs connection processing for the call request or call, is recorded on a computer-readable recording medium. Therefore, by making the computer system read and execute the program recorded on this recording medium, even if the wireless channel is congested, a call request (emergency request) from a subscriber who calls an emergency partner is called. Call), or when there is an incoming call to a subscriber to be preferentially connected, a radio channel can be allocated reliably for emergency calls and calls of subscribers to be preferentially connected. Can be accommodated without distinguishing between emergency calls and subscriber calls to be preferentially connected. For this reason, channel resources can be used effectively.

1 is a block diagram showing a schematic configuration of a wireless subscriber system according to an embodiment of the present invention. The block diagram which shows the specific structure of the access controller and wireless base station in the wireless subscriber system in FIG. The flowchart which shows an example of control operation of the access controller and wireless base station in the wireless subscriber system shown in FIG. The flowchart which shows an example of control operation of the access controller and wireless base station in the wireless subscriber system shown in FIG. FIG. 3 is a sequence diagram showing an example of a control operation of the wireless subscriber system shown in FIG. 2. The flowchart which shows the other example of control operation of the access controller and wireless base station in the wireless subscriber system shown in FIG. The flowchart which shows the other example of control operation in the access controller and radio | wireless base station in the radio | wireless subscriber system shown in FIG. The flowchart which shows the other example of control operation of the access controller and wireless base station in the wireless subscriber system shown in FIG. The sequence diagram which shows the other example of control operation of the radio | wireless subscriber system shown in FIG. The block diagram which shows the structure of the conventional wireless subscriber system. 11 is a flowchart showing an example of a control operation of the conventional wireless subscriber system shown in FIG. 11 is a flowchart showing another example of the control operation of the conventional wireless subscriber system shown in FIG.

Explanation of symbols

10 Public Switched Telephone Network 12 Switch 20 Access Network 22 Access Controller (Line Connection Control Device)
24 radio base stations 30A, 30B telephones SU-A, SU-B subscriber radio devices 40 call signal detection units 42 priority determination processing units 44 subscriber priority connection class databases 46 emergency telephone number / radio channel number storage devices 48 dial information Monitor and emergency / non-emergency call determination unit 50 wireless transmission / reception circuit 52 message protocol processing unit 54 call information management database during call 56 time measuring device

Claims (3)

A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In a wireless subscriber system having a line connection control device that performs connection control of
The line connection control device includes:
Prioritized connection class data indicating the priority connection order and subscriber identification information for specifying a subscriber are registered in advance, and a telephone number of a specific destination requiring urgentness is registered in advance. ,
When the radio channel is in a congested state, when a call request from the subscriber is newly made or an incoming call is made to the subscriber, the priority connection class has a high and low level and urgency with respect to the call currently being talked A wireless subscriber system which performs connection processing for a call request or an incoming call based on a determination as to whether or not the call is an emergency call. A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In a line connection control device of a wireless subscriber system having a line connection control device that performs connection control of
The line connection control device
Prioritized connection class data indicating the priority connection order and subscriber identification information for specifying a subscriber are registered in advance, and a telephone number of a specific destination requiring urgentness is registered in advance. When the radio channel is in a congested state, when there is a new call request from the subscriber or an incoming call to the subscriber, the priority connection class level and urgency of the currently active call are A line connection control apparatus for a wireless subscriber system, which performs connection processing for a call request or an incoming call based on a determination as to whether or not the call is an emergency call. A subscriber wireless device installed in a subscriber's home and connected to a telephone; a wireless channel set between the subscriber wireless device connected to a switch of a public switched telephone network via a subscriber line and the subscriber line In a line connection control device of a wireless subscriber system having a line connection control device that performs connection control of
Line connection control device
Prioritized connection class data indicating the priority connection order and subscriber identification information for specifying a subscriber are registered in advance, and a telephone number of a specific destination requiring urgentness is registered in advance. When the radio channel is in a congested state, when there is a new call request from the subscriber or an incoming call to the subscriber, the priority connection class level and urgency of the currently active call are In order to cause a computer to execute the function of a line connection control device of a wireless subscriber system, which performs connection processing for an outgoing call request or an incoming call based on a determination as to whether or not the call is an emergency call A computer-readable recording medium on which the program is recorded.