RU2716014C1 - Method of controlling connections in a mobile communication network when a called subscriber is out of network coverage area - Google Patents

Abstract

FIELD: telephone communication control.

SUBSTANCE: invention relates to the field of telephone communication control. When attempting to access a calling subscriber through a MSC-A switch to a called subscriber from a MSC-A switch of a calling subscriber, sending a signal to a first platform – an intelligent platform for trying to call a subscriber B, using the first platform, checking the sufficiency of means on the balance of the calling subscriber, in case of sufficient funds from the switch of the MSC-A network of the calling subscriber through the HLR, requesting the location of the called subscriber; establishing connection between switches of calling and called subscribers, in case, if the called subscriber is unavailable, through the switches, the subscriber unavailability signal is sent to the first platform; from first platform is sent to second platform – service platform, serving for separate short call, code of event occurred and information on numbers of calling (MS-A) and called (MS-B) subscribers via REST/SOAP protocol; from the second platform through the switch of the called subscriber MSC-B, a request to the called subscriber on accessibility is initiated, after reception by second platform of signal from called subscriber about its availability to communication network, second platform initiates short call to called subscriber, receives from called subscriber signal on incoming call and interrupts said short call.

EFFECT: high reliability of telephone communication when a called subscriber is outside the network coverage area.

1 cl, 1 dwg

Description

The invention relates to the field of telephone communications, in particular to a protocol for managing calls in the telephone network when the called subscriber is outside the network coverage area.

According to recent studies, companies working in the field of mobile telephony are faced with the fact that tens of millions of phone calls fail every day due to the fact that the “target” mobile phone is unavailable or is in sleep mode.

In other words, despite the growing use of mobile phone systems and call forwarding services, in some special conditions more than 400 calls per second disappear, which limits the amount of outgoing traffic or, in one way or another, leads to limited or incomplete customer service.

To solve these problems, it was proposed, in particular, a telephone communication control method according to the RF patent No. 2270532 (IPC H04Q 7/38, published 02.20.2006), containing the stages in which: I - determine whether the called subscriber is unavailable due to that the mobile phone is in the disconnected mode or due to the lack of a radio signal, and if the phone is not forwarded to the answering machine service or another telephone number does not work, II - if confirmed, route the telephone call from the switching unit to the telephone for storage call and data management, III - extract the telephone number of the calling subscriber from the signaling component of the routed telephone call and record this telephone number and time / date of the telephone call in the list of numbers, IV - issue a delivery message to the switching node so that this switching the node could release the phonical channel of the telephone call, V - determine whether the mobile phone of the called subscriber is again available, VI - in case of confirmation, send SMS messages a message containing the telephone number and time / date of the telephone call; VII — send an SMS message indicating the telephone number and time / date of the telephone call from the SMS service center to the mobile phone of the called subscriber.

A disadvantage of the known solution is the low reliability of establishing telephone connections, the inconvenience of using the proposed solution, requiring additional actions by subscribers, as well as the delay in delivering messages about missed calls.

The technical result from the use of the proposed technical solution can be expressed in increasing the reliability and convenience of telephone communications in case the called subscriber is outside the network coverage area.

To achieve the claimed technical result, a method for managing connections in a mobile communication network when the called subscriber is outside the network coverage area is proposed, comprising the following steps:

- provide an attempt to access the caller through the switch MSC-A to the called subscriber;

- a signal is sent from the MSC-A network switch of the calling subscriber to the first platform - an intelligent platform about an attempt to call subscriber B;

- using the first platform check the adequacy of funds on the balance of the caller;

- in case of sufficient funds, a request for the location of the called subscriber is sent from the MSC-A network switch of the calling subscriber through the HLR;

- establish a connection between the switches of the calling and called subscribers, if the called subscriber is unavailable, then through the switches the signal about the unavailability of the subscriber is sent to the first platform;

- from the first platform they send to the second platform - the service platform, the code of the event and information about the numbers of the calling A and called B subscribers using the REST / SOAP protocol;

- from the second platform through the switch of the called subscriber MSC-B initiate a request to the called subscriber for availability;

- after the second platform receives a signal from the called subscriber about its accessibility to the communication network, the second platform initiates a separate short call to the called subscriber;

- receive an incoming call signal from the called subscriber;

- interrupt the mentioned separate short call.

When describing a method for managing connections in a mobile communication network, the term “short call” refers to a call to a subscriber who is interrupted by the call initiator immediately after receiving information that the initiated call has reached the called subscriber, while the called subscriber cannot answer the short call. Call initiator refers to a service platform.

The use of two platforms during the technical implementation of the method: the first one is an intelligent platform and the second one is a service platform, which serves to make a separate short call to the called subscriber, which allows to ensure higher reliability of the system due to the distribution of the functionality provided by each platform. This distribution increases the reliability of the entire system as a whole, reduces the number of system failures and extends the duration of uninterrupted use.

In FIG. 1 presents the proposed scheme for implementing the method, in which, to indicate the technical means used in the implementation of the method, the following notation is used:

A - any subscriber, pos. 1;

B - subscriber, user of service, pos. 2;

MSC-A - Subscriber Zone Switch pos. 3

MSC-B / TMSC - Subscriber Switch B / Transit Switch, pos. 4

the first platform is an intelligent platform - pos. 5

the second platform is a service platform, which is used to make a separate short call - pos. 6

HLR (Home Location Register) - home subscriber location register, pos. 7

SMSC - short message center, pos. 8

An example implementation of the method with reference to FIG. 1.

Subscriber A (1) initiates a call to the telephone set of subscriber B (2) through the caller’s switch MSC-A (3). The mobile switch (3) informs the first - the intelligent platform (5) of the call attempt via CAMEL protocol (IDP message in accordance with 3GPP recommendation 23.078). The first platform instructs switch 3 to continue establishing communication with subscriber B (2) (CAMEL protocol in accordance with 3GPP recommendation 23.078). After that, the caller’s switch (3) sends a request through the HLR register (7) to determine the location (route number) of subscriber B (MAP protocol SRI + PRN messages, in accordance with 3GPP recommendation 29.002). Next, a connection is established between the switches MSC-A (3) and MSC-B (4) by the route number (ISUP message protocol IAM, in accordance with ITUT recommendation Q.763). If, when making an attempt to connect with subscriber B (2), subscriber B (2) is outside the network coverage area, switch MSC-B (4) transmits the corresponding signal to switch MSC-A (3) (ISUP protocol of REL / ACM message, in accordance with ITUT recommendation Q.763), and the MSC-A switch (3) sends an information signal to the first platform (5) that subscriber B (2) is unavailable (“not reachable” state) (CAMEL protocol in accordance with the recommendation 3GPP 23.078). From the first platform (5), the information signal about this event is sent to the second platform - the service platform, which serves to make a separate short call to the called party (6) (SOAP protocol). From the second platform (6), they send to the SMSC short message center (8) an SMPP message with parameter PID 0x40 for number B (2), which is sent via SMSC (8) with parameter PID 0x40 as MAP MT-FSM to MSC switch -B (4). From the called subscriber switch MSC-B (4), an SMS message with parameter PID 0x40 is delivered to subscriber B (2), and the switch MSC-B (4) sends an SMS delivery signal with parameter PID 0x40 to SMSC (8). The SMSC short message center (8) transmits an SMS delivery signal with parameter PID 0x40 to the second platform (6). The second platform (6) initiates a short call as a SIP-I INVITE to the TMSC transit switch for subscriber B (2), from which the MAP SRI sends a HLR request (7) and receives the MSC-B switch address (4), where now subscriber phone B is registered (2). The TMSC transit switch initiates a short call as ISUP IAM / SIP-I INVITE to the MSC-B switch (4), and from the MSC-B switch (4) the short call is routed to subscriber B (2), on whose telephone the call signal is turned on, to the answer from the subscriber’s phone In (2), the indication of the ongoing call (Alerting / ISUP CPG / SIP-I 180 Ringing) is sent along the MSC-B / TMSC / second platform, and the second platform interrupts the short call (SIP-I CANCEL / ISUP REL) by chain TMSC / MSC-B / MS-B.

Claims (11)

A method for managing connections in a mobile communication network when the called subscriber is outside the network coverage area, comprising the following steps: - provide an attempt to access the caller A through the switch MSC-A to the called subscriber B; - a signal is sent from the MSC-A network switch of the calling subscriber to the first platform - an intelligent platform about an attempt to call subscriber B; - using the first platform check the adequacy of funds on the balance of the caller A; - in case of sufficient funds, a request for the location of the called subscriber is sent from the MSC-A network switch of the calling subscriber through the HLR; - establish a connection between the switches of the calling and called subscribers, if the called subscriber B is unavailable, then through the switches the signal about the unavailability of the subscriber is sent to the first platform; - they are sent from the first platform to the second platform - the service platform, which serves for making a separate short call to the called party, the code of the event and information about the numbers of the calling (MS-A) and called (MS-B) subscribers using the REST / SOAP protocol; - from the second platform through the switch of the called subscriber MSC-B initiate a request to the called subscriber for availability; - after the second platform receives a signal from the called subscriber about its accessibility to the communication network, the second platform initiates a separate short call to the called subscriber; - receive an incoming call signal from the called subscriber; - interrupt the mentioned short call.

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