JP2015165634A - Information processor, information processing system and information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent progression of congestion within a network.SOLUTION: The information processor includes: a request determination section that determines the availability of connection relevant to a connection request from a terminal; a determination section that determines a recommendation time of the next connection request and the priority of connection via connection request of the request source terminal which has been determined as rejection of the connection request; and a response processing section that generates a rejection response including the recommendation time and the priority to transmit the same to the request source terminal. When the connection request from the request source terminal includes the recommendation time and the priority, the request determination section determines whether the recommendation time of the connection request is observed and whether the connection relevant to the connection request is available. When determining the rejection of the connection request from the request source terminal, the determination section changes the priority on the basis of whether the recommendation time is observed.

Description

  The present invention relates to an information processing apparatus, an information processing system, and an information processing method for performing priority connection processing for a connection request.

  FIG. 1 is a diagram showing an example of the configuration of a mobile communication network system. The mobile communication network system P100 is a system in which services such as an IP phone are provided to subscribers. The mobile communication network system P100 includes a portable terminal P2, a base station P3 that accepts access from the portable terminal P2, and an exchange P1 that processes calls from the portable terminal P2 received through the base station P3.

The exchange P1 includes a signal processing unit P11, a call control unit P12, and a subscriber information database (DB) P13. The signal processing unit P11 extracts user data including call information from the received signal in accordance with a protocol such as SIP (Session Initiation Protocol), and outputs the user data to the call control unit P12. The subscriber information DB P13 stores information about each user such as the telephone number, IP address, and contents of the contract service of each user (subscriber). The call control unit P12 reads out the information of the caller user and the callee user from the subscriber information DB P13, and the call source user mobile terminal P2 and the callee user mobile terminal P2 Process to establish a session between.

  That is, in the signal processing unit P11, signal processing is performed in accordance with the protocol without being aware of user distinction. On the other hand, the call control unit P12 distinguishes users, and for example, determines whether to permit or reject a call, or performs priority processing according to a contract service, according to each user's information.

JP 2007-053676 A

  However, for example, the mobile communication network system P100 as shown in FIG. 1 has the following problems.

  When congestion occurs in the network, the exchange P1 selects a call according to a predetermined condition, and performs a priority connection process in which the selected call is preferentially connected. For this reason, at the time of congestion, communication of the portable terminal P2 becomes difficult. As described above, even when the communication of the mobile terminal P2 is difficult to connect, the user of the mobile terminal P2 cannot know the status of network congestion. Therefore, the user often tries to call again. If the situation in which communication is difficult to continue continues, a situation occurs in which calls are repeatedly made by the user, which promotes network congestion. Moreover, dissatisfaction with not being able to connect a user's communication will be raised.

In addition, the priority connection processing at the time of congestion in the exchange P1 is performed by the call control unit P12. However, since processing other than the priority connection processing is also performed in the call control unit P12, the processing load on the exchange P1 increases. When the priority connection processing at the time of congestion is performed for each user, information on the priority connection processing of each user is held in the subscriber information DB P13, and the call control unit P12 stores the subscriber information D.
Since the information is read from the BP 13 and the priority connection process is performed, the processing load becomes higher. Therefore, the priority connection process at the time of congestion of the exchange P1 may increase the processing load of the exchange P1 and promote congestion.

  An object of one embodiment of the present invention is to provide an information processing device, an information processing system, and an information processing method for mitigating congestion.

One aspect of the present invention is:
A request determination unit that determines whether or not a connection is possible in response to a connection request from a terminal;
A determination unit for determining a recommended time of a next connection request and a priority of connection by the connection request of the request source terminal for which rejection of the connection request is determined;
A response processing unit that generates a rejection response including the recommended time and the priority and transmits the rejection response to the request source terminal;
With
When the connection request from the request source terminal includes the recommended time and the priority, the request determination unit is based on whether the connection request is in compliance with the recommended time and the priority. To determine whether or not to connect to the connection request,
The determination unit, when it is determined that the connection request from the request source terminal is rejected, the priority is changed based on whether or not the recommended time is observed;
Information processing apparatus.

  Another aspect of the present invention is an information processing system including a terminal that transmits a connection request and the information processing apparatus described above. Another aspect of the present invention is an information processing method in which a computer executes the above-described processing. Another aspect of the present invention can include a program that causes a computer to function as the information processing apparatus described above, and a computer-readable non-transitory recording medium that records the program. A non-transitory recording medium that can be read by a computer, etc., which stores information such as data and programs by electrical, magnetic, optical, mechanical, or chemical action and can be read by a computer or the like Say medium.

  According to the disclosed information processing apparatus, information processing system, and information processing method, it is possible to reduce congestion.

It is a figure which shows an example of a structure of a mobile communication network system. It is a figure which shows one of the processes of the exchange which concerns on 1st Embodiment. It is an example of the process sequence in a mobile communication network system when a portable terminal transmits a connection request according to the designated priority time zone. It is an example of the process sequence in a mobile communication network system when a portable terminal transmits a connection request outside the designated priority time zone. It is a figure which shows an example of the hardware constitutions of an exchange. It is a figure which shows an example of a function structure of the switching device which concerns on 1st Embodiment. It is a figure which shows an example of the determination process of the priority time slot | zone of a priority connection information generation part. It is a figure which shows an example of the priority determination process of a priority connection information generation part. It is an example of the flowchart of a process of a signal transmission / reception part. It is an example of the flowchart of a process of a priority time slot | zone determination part. It is an example of the flowchart of a process of a priority determination part. It is an example of the flowchart of a process of a priority connection information generation part. It is an example of the sequence diagram of the process between the exchange and portable terminal in 1st Embodiment. It is an example of the sequence diagram of the process between the exchange and portable terminal in 1st Embodiment. It is an example of the sequence diagram of the process between the exchange and portable terminal in 1st Embodiment. It is an example of the sequence diagram of the process between the exchange and portable terminal in 1st Embodiment. It is an example of the sequence diagram of the process between the exchange and portable terminal in 1st Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment.

<First Embodiment>
The configuration of the mobile communication network system in the first embodiment includes a plurality of exchanges, mobile terminals 2, and base stations, as in the mobile communication network system P100 shown in FIG.

  FIG. 2 is a diagram illustrating one process of the exchange 1 according to the first embodiment. Although the mobile communication network system of the first embodiment includes a base station, in FIG. 2 and subsequent figures, for convenience, the exchange 1 and the portable terminal 2 are extracted and shown.

  In the first embodiment, in the exchange 1, the signal processing unit 11 performs call processing availability determination by the call control unit 12, that is, priority connection processing for a connection request that is a call from the mobile terminal 2. The call processing by the call control unit 12 is a series of processing for connecting a call with a destination device. When it is determined that the call control unit 12 rejects the call processing, the signal processing unit 11 determines the priority time zone for recommending connection of the caller mobile terminal 2 and the priority of the connection request for the mobile terminal 2. And a rejection response including these is transmitted to the portable terminal 2. The priority time zone is an example of “recommended time”.

  The priority time zone and the priority are included in the rejection response as the priority connection information. In order to prevent falsification of the priority time zone or priority by the user of the mobile terminal 2, the priority connection information is encrypted by the signal processing unit 11 using a predetermined secret key. However, the priority time zone is transmitted in plain text in addition to the priority connection information and included in the rejection response in order to notify the user of the mobile terminal 2. Although the exchange 1 has the secret key, the portable terminal 2 does not have it.

  Next, when the corresponding mobile terminal 2 makes a call, the connection request is transmitted including the preferentially encrypted connection information included in the rejection response. Upon receiving this connection request, the signal processing unit 11 of the exchange 1 decrypts the priority connection information included in the connection request using the secret key, receives the priority time zone and priority included in the priority connection information, and the connection request. Based on the time, the call processing for the connection request is determined.

  As described above, when the call processing is rejected for the connection request, the exchange 1 transmits the priority time zone and the priority to the mobile terminal 2 that has made the connection request, and the mobile terminal that has made the call 2 includes the priority time zone and the priority in the connection request when a call is made again. As a result, the exchange 1 can determine whether or not call processing is possible using the priority time zone and priority included in the connection request without holding the database for the priority connection processing. Further, the exchange 1 can perform priority processing according to the behavior of the user of the mobile terminal 2.

  In the first embodiment, since priority processing can be performed using the priority time zone and priority information included in the connection request without distinguishing between users, the signal processing unit 11 performs priority processing. Since the signal processing unit 11 can perform processing with a lighter load than the processing of the call control unit 12, the processing load on the exchange 1 can be suppressed.

  FIG. 3 is an example of a processing sequence in the mobile communication network system when the mobile terminal 2 transmits a connection request in accordance with the designated priority time zone. In the example shown in FIG. 3, it is assumed that the exchange 1 detects congestion.

  When receiving the connection request from the portable terminal 2 (OP1) and rejecting the call processing due to congestion, the exchange 1 transmits a rejection response (OP2). This rejection response includes priority connection information including a priority time zone and priority, and a priority time zone. The priority time zone and priority notified to the mobile terminal 2 in OP2 are the initial values. Note that the priority connection information is encrypted by the exchange 1. The mobile terminal 2 keeps the priority connection information in the buffer and displays it on the display to notify the user of the mobile terminal 2 of the priority time zone.

  Next, the portable terminal 2 transmits a connection request during the priority time period notified by the rejection response by the user's operation (OP3). This connection request includes the priority connection information included in the rejection response in an encrypted form.

  Since congestion continues, the exchange 1 transmits a rejection response to the connection request from the portable terminal 2 (OP4). This rejection response includes the encrypted priority connection information and the priority time zone. The exchange 1 decodes the priority connection information included in the connection request, extracts the priority time zone, and compares it with the reception time of the connection request to determine whether or not the connection request is transmitted according to the designated priority time zone. . In the example shown in FIG. 3, the connection request is transmitted according to the priority time zone, and the priority included in the rejection response is set high. Next, when the mobile terminal 2 transmits a connection request, the mobile terminal 2 can use a higher priority (OP5).

  FIG. 4 is an example of a processing sequence in the mobile communication network system when the mobile terminal 2 transmits a connection request outside the designated priority time zone. In the example shown in FIG. 4, it is assumed that the exchange 1 detects congestion. In the example shown in FIG. 4, the processes of OP1 and OP2 in the example shown in FIG. 3 are completed, and the subsequent processes are shown.

  The portable terminal 2 transmits a connection request outside the priority time period notified by the rejection response (OP11). In this connection request, the priority connection information included in the rejection response from the exchange 1 is included in an encrypted form.

  Congestion continues, and the exchange 1 transmits a rejection response to the connection request from the portable terminal 2 (OP12). The rejection response includes the encrypted priority connection information and the priority time zone. In the example shown in FIG. 4, the connection request is transmitted outside the priority time zone, and the priority included in the rejection response is set low. Next, when the portable terminal 2 transmits a connection request, the priority becomes lower (OP13).

In the first embodiment, when a rejection response is returned in response to a connection request due to occurrence of congestion or the like, the exchange 1 notifies the mobile terminal 2 of the priority time zone and the priority. The portable terminal 2 transmits the connection request including the priority time zone and priority notified from the exchange 1. Thereby, the exchange 1 can acquire the priority time zone and priority of the portable terminal 2 without having a database, and can perform the priority connection process. Since the mobile terminal 2 moves, it is difficult to predict which exchange 1 the mobile terminal 2 will connect to. However, since the exchange 1 does not hold a database for priority connection processing, the mobile terminal 2 uses any exchange. Even when connected to 1, it is possible to have priority connection processing performed. For example, even when the mobile terminal 2 is connected to a switch other than the switch 1 that has notified the priority time zone and priority, the priority connection process can be performed. In addition, since the priority setting varies depending on whether or not the connection request conforms to the priority time zone, the user can be prompted to transmit the connection request according to the priority time zone.

  When the priority connection time zone has passed, the mobile terminal 2 discards the priority connection information and the priority time zone notified by the rejection response from the buffer, and thereafter transmits a connection request not including the priority connection information.

<Configuration of exchange>
FIG. 5 is a diagram illustrating an example of a hardware configuration of the exchange 1. The exchange 1 includes a CPU (Central Processing Unit) 101, a main storage device 102, an auxiliary storage device 105, and a network interface 107, which are electrically connected by a bus 109.

  The CPU 101 executes various processes by loading the OS and various application programs held in the auxiliary storage device 105 into the RAM 102 and executing them. The number of CPUs 101 is not limited to one, and a plurality of CPUs 101 may be provided.

The main storage device 102 provides the CPU 101 with a storage area and a work area for loading a program stored in the auxiliary storage device 105, and is used as a buffer. The main storage device 102 is, for example, DRAM (Dynamic RAM), SRAM (Static RAM)
Semiconductor memory such as SDRAM (Synchronous DRAM). Further, the main storage device 102 may include a ROM (Read Only Memory).

  The auxiliary storage device 105 stores various programs and data used by the CPU 101 when executing each program. The auxiliary storage device 105 is a non-volatile storage medium such as an EPROM (Erasable Programmable ROM) or a hard disk drive. The auxiliary storage device 105 holds, for example, an operating system (OS), a priority connection processing program, a call processing program, a congestion control program, and various other application programs.

  The priority connection processing program is a program for notifying the mobile terminal 2 of the priority time zone and priority together with the rejection response, and performing the priority connection processing according to the priority time zone and priority included in the connection request. The priority connection processing program is an example of an “information processing program”. The call processing program is a program for establishing a call. The congestion control program is a program for detecting congestion.

  The network interface 107 is a circuit that connects a cable of a wired network line such as an optical cable or a LAN (Local Area Network) cable.

  Note that the hardware configuration of the exchange 1 shown in FIG. 5 is an example, and is not limited to the above, and components can be omitted, replaced, or added as appropriate according to the embodiment. For example, the exchange 1 may include a portable recording medium driving device and use a portable recording medium such as an SD card as one of the auxiliary storage devices.

FIG. 6 is a diagram illustrating an example of a functional configuration of the exchange 1 according to the first embodiment. The exchange 1 includes a signal processing unit 11, a call control unit 12, and a congestion control unit 13 as functional configurations. The signal processing unit 11 is a functional block realized by the CPU 101 executing a priority connection processing program. The call control unit 12 is a functional block realized by the CPU 101 executing a call control program. The congestion control unit 13 is a functional block realized by the CPU 101 executing a congestion control program. Note that these functional blocks may be realized as hardware such as an FPGA (Field-Programmable Gate Array). The exchange 1 is an example of an “information processing apparatus”.

  The call control unit 12 performs a series of processes for establishing a connection request call. More specifically, the call control unit 12 performs session establishment processing such as obtaining the telephone number, IP address, and the like of the mobile terminal 2 that is the connection request destination from the database and performing call processing. In addition, the call control unit 12 reads information on the user of the mobile terminal 2 that is the transmission source of the connection request from the database, and provides a service according to the contract service.

  The congestion control unit 13 detects a congestion state. In the first embodiment, the congestion control unit 13 determines the congestion state at 10 levels based on the processing load of the CPU 101, the memory usage rate, the data inflow amount, and the like. The congestion control unit 13 calculates the congestion level at a predetermined cycle and notifies the signal processing unit 114 of the calculation. In the first embodiment, the congestion threshold is 6, and when it is less than the congestion level 6, it is determined that the congestion has not occurred, and the congestion has occurred at the congestion level 6 or higher. . The congestion level is not limited to 10 levels. Further, the detection of the congestion state is not limited to that performed based on the internal load of the exchange 1, and may be performed upon receiving notification of the occurrence of congestion in the network from an external device.

  The signal processing unit 11 includes a signal transmission / reception unit 111, a priority time zone determination unit 112, a priority determination unit 113, and a priority connection information generation unit 114. The signal received through the network interface 107 is converted into a message of a call control protocol such as SIP by a predetermined process before reaching the signal processing unit 11.

  The signal transmission / reception unit 111 determines whether or not to perform call processing by the call control unit 12 according to the congestion state in response to the received connection request. In the first embodiment, when the congestion level notified from the congestion control unit 13 is less than the congestion threshold, the signal transmission / reception unit 111 determines that no congestion has occurred and permits call processing for a connection request. To the call control unit 12.

  When the congestion level is equal to or higher than the congestion threshold, the signal transmission / reception unit 111 determines that congestion has occurred, extracts the priority connection information included in the connection request, and decrypts it using the secret key. The secret key is held in a storage area of the auxiliary storage device 105, for example. The secret key is assumed to be unified by the exchange 1 in the mobile communication network system. The signal transmitting / receiving unit 111 requests the priority time zone determination unit 112 and the priority level determination unit 113 to determine the priority time zone and the priority level for the extracted priority connection information. The signal transmission / reception unit 111 determines whether or not the call processing of the connection request received in the congestion occurrence state can be performed according to the determination results from the priority time period determination unit 112 and the priority determination unit 113. When the permission of the call processing for the connection request is determined, the signal transmission / reception unit 111 requests the call control unit 12 to perform the call processing for the connection request. If it is determined that the call processing for the connection request is rejected, the signal transmission / reception unit 111 generates a rejection response and transmits it to the portable terminal 2 that is the transmission source of the connection request.

  When the priority connection information is not included in the connection request received in a congested state, the signal transmission / reception unit 111 requests the priority connection information generation unit 114 to generate priority connection information. When the priority connection information is received from the priority connection information generation unit 114, the signal transmission / reception unit 111 encrypts the priority connection information with a secret key, includes the priority connection information in the rejection response, and transmits the connection request from the portable terminal 2 Send to. The signal transmission / reception unit 111 is an example of a “request determination unit” or a “response processing unit”.

Upon receiving a request from the signal transmission / reception unit 111, the priority time zone determination unit 112 determines whether the connection request is made according to the priority time zone, and returns the determination result to the signal transmission / reception unit 111. In the first embodiment, the priority time zone determination unit 112 compares the reception time of the connection request with the priority time zone extracted from the connection request, and determines whether or not the connection request is made according to the priority time zone. . The reception time of the connection request is given to the connection request in a process before being input to the signal processing unit 11, or is recorded in the memory, for example. The mobile terminal 2 may add the transmission time to the connection request, and the priority time zone determination unit 112 may perform the above determination by comparing the transmission time with the priority time zone.

  When the connection request is received outside the priority time zone, the priority time zone determination unit 112 requests the priority connection information generation unit 114 to generate priority connection information. When the priority connection information is received from the priority connection information generation unit 114, the priority time zone determination unit 112 transmits the priority connection information and the priority time zone determination result to the signal transmission / reception unit 111.

  Upon receiving a request from the signal transmission / reception unit 111, the priority determination unit 113 determines whether the priority extracted from the connection request is a connectable priority, and sends the determination result to the signal transmission / reception unit 111. return. In the first embodiment, the priority is 10 steps as in the congestion level, and the priority determination unit 113 compares the priority extracted from the connection request with the congestion level and performs the above determination. If the priority extracted from the connection request is a priority that cannot be connected, the priority determination unit 113 requests the priority connection information generation unit 114 to generate priority connection information. When the priority connection information is received from the priority connection information generation unit 114, the priority determination unit 113 transmits the priority connection information and the priority determination result to the signal transmission / reception unit 111.

  The priority connection information generation unit 114 receives a request from the signal transmission / reception unit 111, the priority time zone determination unit 112, or the priority determination unit 113, determines a priority time zone and a priority, and generates priority connection information. To do. The priority connection information generation unit 114 is an example of a “determination unit”.

  FIG. 7 is a diagram illustrating an example of a priority time zone determination process of the priority connection information generation unit 114. FIG. 7 shows an example in which the connection request reception time is 18:00 and the congestion level is 7.

  The priority connection information generation unit 114 determines the width (time length) of the priority time zone based on the priority period information. The priority period information is information indicating the width of the priority time zone determined by the system administrator, and is 10 minutes in the example shown in FIG.

  Further, the priority connection information generation unit 114 determines the start time of the priority time zone based on the priority time zone definition table. In the priority time zone definition table, the elapsed time from the reception time of the connection request, which is the start time of the priority time zone, is defined according to the congestion state and the compliance status of the priority time zone. For example, in the example shown in FIG. 7, when the priority time zone is observed and the congestion level is equal to or higher than the congestion consideration threshold, the start time of the priority time zone is set 10 minutes after the connection request reception time. The The congestion consideration threshold is different from the congestion threshold used by the signal transmission / reception unit 111 to determine the occurrence of congestion, but the value may be the same or different. In the example shown in FIG. 7, the congestion consideration threshold is 6. The priority period information, the priority time zone definition table, and the congestion consideration threshold value are stored in the auxiliary storage device 105.

The elapsed time from the connection request reception time, which is the start time of the priority time zone, is set so as to increase in the following order of A <B <C <D, for example.
(A) The priority time zone is observed and the congestion level is less than the congestion consideration threshold.
(B) The priority time zone is observed and the congestion level is equal to or higher than the congestion consideration threshold.
(C) The priority time zone is not observed and the congestion level is less than the congestion consideration threshold.
(D) The priority time zone is not observed and the congestion level is equal to or higher than the congestion consideration threshold.

  In the example shown in FIG. 7, when the connection request is received outside the priority time zone, it corresponds to the above (D), and the priority connection information generation unit 114 sets the priority time zone to the reception time of the connection request. Determine 10 minutes from 18:20 to 18:30 after 20 minutes. In the example shown in FIG. 7, when the connection request is received within the priority time zone, it corresponds to the above (B), and the priority connection information generation unit 114 sets the priority time zone to the connection request reception time. Decide in 10 minutes from 18:10 to 18:20 after 10 minutes. If the connection request is for the first time, the priority time zone is treated as being observed.

  FIG. 8 is a diagram illustrating an example of priority determination processing performed by the priority connection information generation unit 114. FIG. 8 shows an example in which the congestion level is 7. In the first embodiment, the priority is set in 10 stages from 1 to 10. It is assumed that the higher the priority value, the higher the priority.

  When the connection request is the first time when the connection request does not include the priority connection information, the priority connection information generation unit 114 determines the priority initial value as the priority. The priority initial value is set to 5, for example. The initial priority value is stored in the auxiliary storage device 105.

  If the connection request observes the priority time and the priority is less than the congestion level, the priority connection information generation unit 114 determines a value obtained by adding 1 to the priority. If the connection request does not comply with the priority time and the priority is less than the congestion level, the priority connection information generation unit 114 determines the value obtained by subtracting the priority by 1. The fluctuation range of the priority value is not limited to 1, and can be appropriately set by the system designer.

  In the example shown in FIG. 8, when the priority included in the connection request is 5, since the congestion level is lower than 7, the call processing for the connection request is rejected. At this time, when the priority time is observed, for example, the priority included in the rejection response is determined to be 6. When the priority time is not observed, for example, the priority included in the rejection response is determined to be 4.

  In the example shown in FIG. 8, when the priority included in the connection request is 8, it is higher than the congestion level 7, so whether or not the call processing of the connection request can be performed according to the compliance with the priority time zone. If the priority time is observed, call processing of the corresponding connection request is permitted. If the priority time is not observed, it is determined that the call processing of the corresponding connection request is rejected, and the priority included in the rejection response is determined to be 7.

<Process flow>
FIG. 9 is an example of a flowchart of processing of the signal transmission / reception unit 111. The flowchart shown in FIG. 9 is started each time a connection request is received.

  In S1, the signal transmission / reception unit 111 inquires of the congestion control unit 13 about the congestion state and acquires the latest congestion level. Next, the process proceeds to S2.

  In S <b> 2, the signal transmission / reception unit 111 determines whether congestion is occurring. More specifically, the signal transmission / reception unit 111 compares the congestion level with the congestion threshold, and determines that congestion is occurring when the congestion level is equal to or higher than the congestion threshold. If congestion is occurring (S2: YES), the process proceeds to S3. If congestion has not occurred (S2: NO), the process proceeds to S9. In S9, the signal transmission / reception unit 111 determines permission of call processing for the connection request, and transmits the connection request to the call control unit 12. To do. Thereafter, the process shown in FIG. 9 ends.

Since the processing after S3 is a congestion occurrence state, it is a processing for rejecting the connection request call processing. In S3, the signal transmission / reception unit 111 determines whether or not priority connection information is included in the connection request. Whether or not priority connection information is included in the connection request is determined by information in the header of the connection request, for example. When priority connection information is not included in the connection request (S3: NO), it is indicated that the connection request is the first connection request from the mobile terminal 2 that has transmitted the connection request, and the signal transmission / reception unit 111 receives priority. The connection information generation unit 114 is requested to generate priority connection information. When the priority connection information is received from the priority connection information generation unit 114, the process proceeds to S10.

  If priority connection information is included in the connection request (S3: YES), the process proceeds to S4. In S4, the signal transmission / reception unit 111 extracts the preferential connection information encrypted from the connection request, and decrypts the preferential connection information using the secret key. Next, the process proceeds to S5.

  In S5, the signal transmission / reception unit 111 requests the priority time zone determination unit 112 to determine the priority time zone. When the determination result from the priority time period determination unit 112 is received, the process proceeds to S6.

  In S6, the signal transmission / reception unit 111 proceeds to S7 when the determination result from the priority time zone determination unit 112 indicates compliance with the priority time zone of the connection request (S6: YES). If the determination result from the connection time zone determination unit 112 indicates non-compliance with the priority time zone of the connection request (S6: NO), the process proceeds to S10.

  In S <b> 7, the signal transmission / reception unit 111 requests the priority determination unit 113 to determine priority. When the priority determination result is received from the priority determination unit 113, the process proceeds to S8.

  In S8, when the priority determination result is connectable (S8: YES), the process proceeds to S9. In S <b> 9, the signal transmission / reception unit 111 determines permission of call processing for the connection request and transmits the connection request to the call control unit 12. Thereafter, the process shown in FIG. 9 ends.

  When the determination result of the priority is not connectable (S8: NO), the process proceeds to S10. In S10, the signal transmission / reception unit 111 encrypts the priority connection information received from any one of the priority time zone determination unit 112, the priority determination unit 113, and the priority connection information generation unit 114 using a secret key. Next, the process proceeds to S11. The priority connection information is received from the priority time zone determination unit 112 and the priority determination unit 113 together with the respective determination results.

  In S11, the signal transmission / reception unit 111 includes the encrypted priority connection information and the priority time zone in the rejection response, and transmits the rejection response to the mobile terminal 2 that is the transmission source of the connection request. Thereafter, the process shown in FIG. 9 ends.

  FIG. 10 is an example of a flowchart of processing of the priority time zone determination unit 112. The flowchart shown in FIG. 10 is started each time the priority time zone determination unit 112 receives a request for priority time zone determination from the signal transmission / reception unit 111.

  In S21, the priority time zone determination unit 112 determines whether or not the connection request reception time is within the priority time zone. If the connection request reception time is within the priority time zone (S21: YES), the process proceeds to S22. In S22, the priority time zone determination unit 112 notifies the signal transmission / reception unit 111 of a determination result indicating compliance with the priority time zone of the connection request. Thereafter, the process shown in FIG. 10 ends.

  If the connection request reception time is outside the priority time zone (S21: NO), the process proceeds to S23. In S23, the priority time zone determination unit 112 requests the priority connection information generation unit 114 to generate priority connection information. When the priority time zone determination unit 112 receives the priority connection information from the priority connection information generation unit 114, the process proceeds to S24.

  In S24, the priority time zone determination unit 112 notifies the signal transmission / reception unit 111 of a determination result indicating non-compliance with the priority time zone of the connection request and the priority connection information. Thereafter, the process shown in FIG. 10 ends.

  FIG. 11 is an example of a flowchart of processing of the priority determination unit 113. The flowchart shown in FIG. 11 is started each time the priority determination unit 113 receives a priority determination request from the signal transmission / reception unit 111.

  In S31, the priority determination unit 113 determines whether the priority extracted from the connection request is connectable. More specifically, the priority determination unit 113 compares the priority with the congestion level. When the priority is equal to or higher than the congestion level, the priority determination unit 113 determines that the priority of the connection request is a connectable priority.

  If the priority of the connection request is connectable (S31: YES), the process proceeds to S32. In S32, the priority determination unit 113 notifies the signal transmission / reception unit 111 of a determination result indicating that the priority of the connection request is connectable. Thereafter, the process shown in FIG. 11 ends.

  If the priority of the connection request is not connectable (S31: NO), the process proceeds to S33. In S33, the priority determination unit 113 requests the priority connection information generation unit 114 to generate priority connection information. When the priority determination unit 113 receives the priority connection information from the priority connection information generation unit 114, the process proceeds to S34.

  In S34, the priority determination unit 113 notifies the signal transmission / reception unit 111 of a determination result indicating that the priority of the connection request is not connectable and the priority connection information. Thereafter, the process shown in FIG. 11 ends.

  FIG. 12 is an example of a flowchart of processing of the priority connection information generation unit 114. The flowchart shown in FIG. 12 is started every time the priority connection information generation unit 114 receives a request for generation of priority connection information from any one of the signal transmission / reception unit 111, the priority time zone determination unit 112, and the priority determination unit 113. .

  In S41, the priority connection information generation unit 114 determines whether priority connection information is included in the connection request. If the priority connection information is not included in the connection request (S41: NO), it is indicated that the connection request is the first connection request from the portable terminal 2 that has transmitted the connection request, and the process proceeds to S42. In S42, the priority connection information generation unit 114 sets the priority to an initial value. Next, the process proceeds to S45.

  If priority connection information is included in the connection request (S41: YES), the process proceeds to S43. In S43, the priority connection information generation unit 114 determines whether or not the connection request reception time is within the priority time zone.

  If the connection request reception time is within the priority time zone (S43: YES), the process proceeds to S44. In S44, the priority connection information generation unit 114 sets the priority higher than the priority included in the connection request. For example, the priority connection information generation unit 114 sets the priority to a value obtained by adding 1 to the priority included in the connection request. Next, the process proceeds to S45.

In S45, the priority information generation unit 114 compares the congestion level with the congestion consideration threshold. The congestion level can be acquired by inquiring of the signal transmission / reception unit 111, for example. If the congestion level is less than the congestion consideration threshold (S45: NO), the process proceeds to S46. In S46
Since the priority time zone is observed and the congestion is less than the congestion consideration threshold, the priority connection information generation unit 114 determines that the start time of the priority time zone is the earliest based on the priority time zone definition table. Set to. Next, the process proceeds to S52.

  If the congestion level is greater than or equal to the congestion consideration threshold (S45: YES), the process proceeds to S47. In S47, since the priority time zone is observed and the congestion is not less than the congestion consideration threshold, the priority connection information generation unit 114 sets the priority time zone start time to 2 based on the priority time zone definition table. Set the second earliest time. Next, the process proceeds to S52.

  In S43, when the reception time of the connection request is outside the priority time zone (S43: NO), the process proceeds to S48. In S48, the priority connection information generation unit 114 sets the priority lower than the priority included in the connection request. For example, the priority connection information generation unit 114 sets the priority to a value obtained by subtracting 1 from the priority included in the connection request. Next, the process proceeds to S49.

  In S49, the priority information generation unit 114 compares the congestion level with the congestion consideration threshold. If the congestion level is less than the congestion consideration threshold (S49: NO), the process proceeds to S50. In S50, since the priority time zone is not observed and the congestion is less than the congestion consideration threshold, the priority connection information generation unit 114 determines that the start time of the priority time zone is based on the priority time zone definition table. Set to the 3rd earliest time. Next, the process proceeds to S52.

  If the congestion level is greater than or equal to the congestion consideration threshold (S49: YES), the process proceeds to S51. In S51, since the priority time zone is not observed and the congestion is not less than the congestion consideration threshold, the priority connection information generation unit 114 determines that the start time of the priority time zone is based on the priority time zone definition table. Set to the latest time. Next, the process proceeds to S52.

  In S52, the priority connection information generation unit 114 generates priority connection information including the newly determined priority time zone and priority, and any of the signal transmission / reception unit 111, the priority time zone determination unit 112, and the priority determination unit 113 is selected. This is notified to the requester of the priority connection information. Thereafter, the process shown in FIG. 12 ends.

  13A, 13B, 13C, 13D, and 13E are examples of a sequence diagram of processing between the exchange 1 and the portable terminal 2 in the first embodiment. In the example shown in FIGS. 13A to 13E, the exchange 1 and the portable terminal 2 are extracted from the mobile communication network system.

  FIG. 13A shows a sequence of processing when a connection request not including priority connection information is transmitted from the mobile terminal 2.

  In OP21, the mobile terminal 2 transmits a connection request for the first time. This connection request does not include priority connection information.

  In OP22, the signal transmission / reception unit 111 of the exchange 1 receives the connection request and inquires of the congestion control unit 13 about the congestion state (FIG. 9, S1). In OP23, in response to the inquiry from the signal transmission / reception unit 111, the congestion control unit 13 transmits a congestion level as a congestion state. The signal transmission / reception unit 111 determines whether or not congestion has occurred from the congestion level and the congestion threshold (S2 in FIG. 9).

(1-A) When congestion has not occurred In OP24, since congestion has not occurred, the signal transmission / reception unit 111 determines whether or not to permit call processing for a connection request, and requests the call control unit 12 to perform call processing for the connection request. (S9). O
In P25, the call control unit 12 returns a call processing response to the signal transmission / reception unit 111. In OP26, the signal transmission / reception unit 111 transmits a connection request response including a call processing permission to the portable terminal 2 that is the transmission source of the connection request. Thereafter, a call establishment process of the portable terminal 2 is performed.

(1-B) Case of Congestion Congestion has occurred in OP27 (FIG. 9, S2: YES), and the priority connection information is not included in the connection request. A request for generation request is transmitted (FIG. 9, S3: NO). In OP28, the priority connection information generation unit 114 generates priority connection information, includes the response, and transmits it to the signal transmission / reception unit 111 (FIG. 12).

  In OP29, the signal transmission / reception unit 111 encrypts the priority connection information received from the priority connection information generation unit 114 with a secret key (S10 in FIG. 9), and transmits a rejection response to the connection request including the rejection of the call processing. It transmits to the original portable terminal 2 (FIG. 9, S11). This rejection response includes encrypted priority connection information and a non-encrypted priority time zone. The priority time zone is notified to the user, for example, by being displayed on the display of the mobile terminal 2.

  FIG. 13B is an example of a processing sequence when priority connection information is included in the connection request. In OP31, the mobile terminal 2 transmits a connection request including preferential connection information that remains encrypted.

  In OP32, the signal transmission / reception unit 111 of the exchange 1 receives the connection request and inquires of the congestion control unit 13 about the congestion state (FIG. 9, S1). In OP33, the congestion control unit 13 transmits a congestion level as a congestion state in response to an inquiry from the signal transmission / reception unit 111. The signal transmission / reception unit 111 determines whether or not congestion has occurred from the congestion level and the congestion threshold (S2 in FIG. 9).

(2-A) When congestion has not occurred In OP34, since congestion has not occurred, the signal transmission / reception unit 111 determines permission of call processing for a connection request and requests the call control unit 12 for call processing for the connection request. (S9). In OP35, the call control unit 12 returns a call processing response to the signal transmission / reception unit 111. In OP36, the signal transmission / reception unit 111 transmits a connection request response including a call processing permission to the portable terminal 2 that is the transmission source of the connection request. Thereafter, a call establishment process of the portable terminal 2 is performed.

  As described above, when congestion does not occur, connection request call processing is permitted regardless of whether or not priority connection information is included in the connection request.

  FIG. 13C is an example of a processing sequence when priority connection information is included in the connection request and congestion occurs.

(2-B) Case of Congestion In OP41, congestion has occurred (FIG. 9, S2: YES), and priority connection information is included in the connection request (FIG. 9, S3: YES). The unit 111 decrypts the priority connection information with the secret key (FIG. 9, S4), and transmits a request for requesting the priority time zone determination unit 112 to determine the priority time zone (FIG. 9, S5). The priority time zone determination unit 112 compares the priority time zone included in the connection request with the reception time of the connection request, and determines whether or not the connection request is transmitted according to the priority time zone (FIG. 10, S21). ).

(3-A) When the connection request is transmitted according to the priority time zone In OP42, the priority time zone determination unit 12 determines that the connection request is transmitted according to the priority time zone (FIG. 10, S21: YES). ), A response including a determination result indicating compliance with the priority time zone of the connection request is transmitted to the signal transmitting / receiving unit 111 (S22 in FIG. 10).

  In OP43, since the signal transmission / reception unit 111 has received a determination result indicating compliance with the priority time zone of the connection request (FIG. 9, S6: YES), next, to request the priority determination unit 113 to determine the priority. Is transmitted (FIG. 9, S7). The priority determination unit 113 receives a request from the signal transmission / reception unit 111 and determines whether the priority included in the connection request is connectable (FIG. 11, S31).

  FIG. 13D is an example of a processing sequence when a connection request is transmitted according to a priority time zone in a state where the connection request includes priority connection information and congestion occurs.

(4-A) When the priority included in the connection request is connectable in the congestion occurrence state In OP51, the priority determination unit 113 can connect the priority included in the connection request. Therefore (FIG. 11, S31: YES), a response including a determination result indicating that connection is possible is transmitted to the signal transmitting / receiving unit 111 (FIG. 11, S32).

  In OP52, the signal transmission / reception unit 111 receives a response from the priority determination unit 113, determines permission of call processing for the connection request (FIG. 9, S8: YES), and performs call processing for the connection request. (S9 in FIG. 9). In OP53, the call control unit 12 returns a call processing response to the signal transmission / reception unit 111. In OP54, the signal transmission / reception unit 111 transmits a connection request response including permission for call processing to the portable terminal 2 that is the transmission source of the connection request. Thereafter, the call control unit 12 performs processing for establishing a call of the mobile terminal 2.

(4-B) When the priority included in the connection request is not connectable in the congestion occurrence state In OP55, the priority determination unit 113 does not connect the priority included in the connection request ( 11 and S31: NO), a request for requesting generation of priority connection information is transmitted to the priority connection information generation unit 114 (FIG. 11, S33).

  In OP56, the priority connection information generation unit 114 receives the request from the priority determination unit 113, generates priority connection information, and transmits it to the priority determination unit 113 (FIG. 12). The priority included in the priority connection information is set higher than the priority included in the connection request because the connection request is transmitted according to the priority time zone.

  In OP57, the priority determination unit 113 receives the priority connection information from the priority connection information generation unit 114, and transmits a response including the priority connection information and a determination result indicating that connection is not possible to the signal transmission / reception unit 111 (FIG. 11). , S34).

  In OP59, in response to the response from the priority determination unit 113, the signal transmission / reception unit 111 transmits a rejection response including rejection of the call processing to the mobile terminal 2 that is the transmission source of the connection request. The rejection response at this time includes encrypted priority connection information and a non-encrypted priority time zone. The priority included in the priority connection information is higher than the priority included in the connection request.

  FIG. 13E is an example of a processing sequence in the case where the connection request includes priority connection information and the connection request is transmitted without following the priority time zone in a state where congestion occurs.

(3-B) When the connection request is transmitted without following the priority time zone In OP61, the priority time zone determination unit 12 determines non-compliance with the priority time zone of the connection request (FIG. 10, S21: NO). ), A request for requesting generation of priority connection information is transmitted to the priority connection information generation unit 114 (FIG. 10, S23). In OP61, the priority connection information generation unit 114 receives the request from the priority time zone determination unit 112, generates priority connection information, and transmits the priority connection information to the priority time zone determination unit 112 (FIG. 12). The priority included in this priority connection information is set lower than the priority included in the connection request because the connection request is transmitted without following the priority time zone.

  In OP63, the priority time zone determination unit 112 receives the priority connection information from the priority connection information generation unit 114, and the signal transmission / reception unit 111 includes the priority connection information and a determination result indicating non-compliance with the priority time zone of the connection request. A response is transmitted (S24 in FIG. 10).

  In OP64, in response to the response from the priority time zone determination unit 112, the signal transmission / reception unit 111 transmits a rejection response including rejection of the call processing to the mobile terminal 2 that is the transmission source of the connection request. The rejection response at this time includes encrypted priority connection information and a non-encrypted priority time zone. The priority included in the priority connection information of the rejection response is lower than the priority included in the connection request.

<Operation and Effect of First Embodiment>
In the first embodiment, when call processing of a connection request is rejected in a congestion occurrence state, a priority time zone and a priority are notified from the exchange 1 to the mobile terminal 2 together with a rejection response. When the portable terminal 2 makes a connection request again, the priority time zone and the priority are included in the connection request and transmitted to the exchange 1. As a result, the exchange 1 can acquire the priority time zone and priority of the user of the portable terminal 2 from the connection request, and does not need to maintain a database for priority connection processing. As a result, the process of searching the user information in the database can be omitted, and the load of the priority connection process of the exchange 1 can be reduced. By reducing the load of the priority connection processing of the exchange 1, it is possible to reduce congestion.

  Further, in the first embodiment, since the priority time zone is notified to the mobile terminal 2 together with the rejection response, it is possible to suppress the retransmission of the dark connection request by the user of the mobile terminal 2. Further, when a connection request is transmitted according to the priority time zone, even if call processing is rejected, the priority is set high, and the call of the mobile terminal 2 is easily connected. Motivation for observing the belt can be increased. As a result, early congestion can be expected.

  Further, since the exchange 1 does not have to hold a database for priority connection processing, processing for maintaining the consistency of the database between the exchanges 1 in the entire network can be omitted, and the load on the entire network is also increased. It is reduced. In addition, since the mobile terminal 2 moves, it does not know which exchange it is connected to, but since the information used for the priority connection process is included in the connection request, the mobile terminal 2 and the exchange 1 that has notified the priority time zone. The need to connect to the same switch can be eliminated.

  In addition, the mobile terminal 2 is notified of the priority time zone, and it is determined again whether the connection request from the mobile terminal 2 includes the priority time zone and the connection request is transmitted according to the priority time zone included in the connection request. Then, priority connection processing is performed. Thereby, the exchange 1 can perform the priority connection processing according to the behavior of the user of the mobile terminal 2 with a low load.

  In the first embodiment, the priority connection information including the priority time zone and the priority is encrypted by the exchange 1 with the secret key held by the exchange 1 and transmitted to the mobile terminal 2. The portable terminal 2 does not hold the secret key and cannot decrypt the priority connection information. Thereby, falsification of the priority time zone and priority by the portable terminal 2 can be prevented.

  In the first embodiment, the priority connection information generation unit 114 determines the start time of the priority time zone using the priority time zone definition table. Accordingly, the start time of the priority time zone can be determined flexibly according to the presence or absence of compliance with the priority time zone and the congestion status. Also, retransmission of connection requests can be distributed.

<Others>
In the first embodiment, it has been described that the exchange 1 performs the above-described processing in response to a connection request from the mobile terminal 2. However, the present invention is not limited to this, and for example, the exchange 1 is received from a non-mobile terminal such as a PC. The above process may also be performed for a connection request.

DESCRIPTION OF SYMBOLS 1 Switch 2 Mobile terminal 11 Signal processing part 12 Call control part 13 Congestion control part 111 Signal transmission / reception part 112 Priority time zone determination part 113 Priority determination part 114 Priority connection information generation part

Claims (7)

A request determination unit that determines whether or not a connection is possible in response to a connection request from a terminal;
A determination unit for determining a recommended time of a next connection request and a priority of connection by the connection request of the request source terminal for which rejection of the connection request is determined;
A response processing unit that generates a rejection response including the recommended time and the priority and transmits the rejection response to the request source terminal;
With
When the connection request from the request source terminal includes the recommended time and the priority, the request determination unit is based on whether the connection request is in compliance with the recommended time and the priority. To determine whether or not to connect to the connection request,
The determination unit, when it is determined that the connection request from the request source terminal is rejected, the priority is changed based on whether or not the recommended time is observed;
Information processing device.   The determination unit changes the priority to a higher value when the recommended time is observed, and changes the priority to a lower value when the recommended time is not observed. The information processing apparatus according to claim 1. The determining unit determines the recommended time based on whether or not the recommended time is observed and the state of congestion;
The information processing apparatus according to claim 1 or 2. A congestion control unit for calculating a congestion level;
The determining unit, when the recommended time is observed, and when the congestion level is less than a predetermined threshold, when the recommended time is observed, and when the congestion level is equal to or higher than the predetermined threshold, If the time is not observed and the congestion level is less than a predetermined threshold, the recommended time is not observed and the congestion level is greater than or equal to the predetermined threshold, and the start time is Determine the recommended time to be late,
The information processing apparatus according to claim 3. The response processing unit encrypts priority connection information including the recommended time and the priority, and sends a rejection response including the encrypted priority connection information and the unencrypted recommended time to the connection request source terminal. Send,
The information processing apparatus according to any one of claims 1 to 4. A request determination unit that determines whether or not a connection is possible in response to a connection request from a terminal;
A determination unit for determining a recommended time of a next connection request and a priority of connection by the connection request of the request source terminal for which rejection of the connection request is determined;
A response processing unit that generates a rejection response including the recommended time and the priority and transmits the rejection response to the request source terminal;
An information processing apparatus comprising:
A terminal that transmits a connection request including the recommended time and the priority notified by the rejection response;
An information processing system including
When the connection request from the request source terminal includes the recommended time and the priority, the request determination unit is based on whether the connection request is in compliance with the recommended time and the priority. To determine whether or not to connect to the connection request,
The determination unit, when it is determined that the connection request from the request source terminal is rejected, the priority is changed based on whether or not the recommended time is observed;
Information processing system. Computer
Determine whether to accept the connection request from the terminal,
Determining the recommended time of the next connection request and the priority of the connection by the connection request of the requesting terminal that is determined to reject the connection request;
Generating a rejection response including the recommended time and the priority and transmitting it to the requesting terminal;
An information processing method,
When the connection request from the request source terminal includes the recommended time and the priority,
Based on the compliance with the recommended time of the connection request and the priority, the connection request for the connection request is determined,
When the rejection of the connection request from the request source terminal is determined, the priority is changed based on whether or not the recommended time is observed.
Information processing method.