WO2021088768A1

WO2021088768A1 - System and method for re-transmission of failed sms

Info

Publication number: WO2021088768A1
Application number: PCT/CN2020/125895
Authority: WO
Inventors: Chetan pratap singh CHAUHAN; Kanaka raju DEGALA; Rahul Sinha; Santhosh B M
Original assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Priority date: 2019-11-06
Filing date: 2020-11-02
Publication date: 2021-05-14

Abstract

The present invention relates to a system and a method for re-transmission of failed SMS. Upon receiving at least one SMS failure report via a network unit [102] on a SMS sending device [104], at least one failed SMS and a message center number (SMSC) associated with the SMS failure report is determined, wherein said determined SMSC is an erroneous SMSC. Next, a correct SMSC is identified for said erroneous SMSC and the erroneous SMSC is updated with the identified correct SMSC. Thereafter, the at least one failed SMS is automatically re-transmitted using the identified correct SMSC from said SMS sending device [104].

Description

SYSTEM AND METHOD FOR RE-TRANSMISSION OF FAILED SMS

FIELD OF INVENTION

The present application generally relates to the field of mobile communication system, and more particularly, to re-transmission of failed SMS.

BACKGROUND

This section is intended to provide information relating to the field of the invention and thus any approach or functionality described below should not be assumed to be qualified as prior art merely by its inclusion in this section.

Short message services have become very popular throughout the world as many people are turning to short messaging service (SMS messaging) as a way of communication for personal, family, business and social purposes. This mode of communication can provide a number of benefits over the alternate ways of communication. It has been increasingly used by businesses as a low-cost bearer to deliver various types of content such as news, stock price, quizzes, casting of votes, etc. Using SMS communication, a user can leave a message to another user/seven if the recipient is not available. This helps in providing message to the recipient, so that once he/she notices the same, recipient can reply back. With advancement in the technology, smiley and emotions icons are also embedded in the SMS to notify the recipient about your current mood.

The SMS communication follows a set of general protocols for the successful transmission of a SMS/text message. It is a store and forward way of transmitting messages. The message from the sending mobile is stored in a central short message center which then forwards it to the destination mobile and also in any case the recipient is not available, the short message is stored and can be sent later. The short message service center (SMSC) is responsible for accepting and storing messages, retrieving account status, and forwarding messages to the intended recipients.

A number of times the SMSC number gets corrupted or set incorrectly, which leads to the failure of sending SMS. If the SMSC number is set incorrectly, the user device still receives SMS/text messages, because the senders SMSC is forwarding the text messages directly to the SIM installed in the user device, but the said user device fails to send SMS as the texts are not reaching the carrier’s SMSC of user device. There are numerous reasons because of which the SMSC may have been inadvertently or incorrectly configured or outright deleted. In order to successfully transmit or deliver SMS, the SMSC number should be analysed and updated accordingly.

The present solutions only provide the user, the information related to SMS failure indicating the cause of failure as wrong SMSC number. The users then have to manually update the SMSC to successfully transmit the SMS. Furthermore, the present solutions fail to provide the appropriate methods to re-transmit the failed SMS efficiently and effectively.

Therefore, the present techniques and solutions to overcome SMS failure are unable to automatically re-transmit the failed SMS. In view of these and other existing limitations, there is an imperative need to provide a more efficient method and system for re-transmission of failed.

SUMMARY

This section is provided to introduce certain objects and aspects of the present disclosure in a simplified form that are further described below in the detailed description. This summary is not intended to identify the key features or the scope of the claimed subject matter.

In order to overcome at least a few problems associated with the known solutions as provided in the previous section, an object of the present disclosure is to provide a system and method for re-transmission of failed SMS. The present invention comprises a system, a device, and a method for re-transmitting at least one failed SMS. The present invention overcomes the SMS failure problems due to erroneous message center number (SMSC) using an intelligent way to re-transmit the failed SMS by updating the erroneous SMSC by identified correct SMSC.

One aspect of the present invention relates to a method for re-transmission of failed SMS, the said method comprises, receiving, on a SMS sending device, at least one SMS failure report via a network, where SMS failure is caused by an erroneous SMSC. The method further leads to the determination of at least one failed SMS associated with the SMS failure report. Thereafter, the method comprises identification of a correct SMSC for the erroneous SMSC and updating the erroneous SMSC with said identified correct SMSC. Further, the method leads to automatic re-transmission of the at least one failed SMS using the identified correct SMSC.

Another aspect of the invention relates to a device including a processor, a memory, a communication interface, and one or more programs stored in the memory which are stored in the memory. The one or more programs, when executed by the processor, are operable with the processor to: receive at least one SMS failure report, wherein SMS failure is caused by an erroneous SMSC; determine, at least one failed SMS associated with the SMS failure report; identify a correct SMSC for the erroneous SMSC; update the erroneous SMSC by identified correct SMSC; automatically re-transmit the at least one failed SMS using the identified correct SMSC,

Another aspect of the invention relates to a system for re-transmission of failed SMS, the said system comprises, a transceiver unit which is configured to receive, on a SMS sending device, at least one SMS failure report via a network. The system further comprises a SMS send result observer unit connected to the transceiver unit and is configured to determine, at least one failed SMS. The system also comprises an SMSC read/write unit coupled to a memory unit, wherein said SMSC read/write unit is configured to read message center number (SMSC) associated with said SMS failure report, wherein said determined SMSC is an erroneous SMSC. Further, the system comprises a SMS retry block coupled to said SMSC read/write unit, wherein said SMS retry block is configured to automatically re-transmit the at least one failed SMS using the identified correct SMSC.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated herein, and constitute a part of this disclosure, illustrate exemplary embodiments of the disclosed methods and systems in which like reference numerals refer to the same parts throughout the different drawings. Components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Some drawings may indicate the components using block diagrams and may not represent the internal circuitry of each component. It will be appreciated by those skilled in the art that disclosure of such drawings includes disclosure of electrical components, electronic components or circuitry commonly used to implement such components.

FIG. 1 illustrates an exemplary diagram of the network architecture [100] , in accordance with exemplary embodiment of the present disclosure.

FIG. 2 illustrates a block diagram of the system unit [200] , in accordance with exemplary embodiment of the present disclosure.

FIG. 3 illustrates an exemplary method flow diagram [300] depicting method for re-transmission of failed SMS.

FIG. 4 illustrate an exemplary signalling flow diagram [400] , for retransmission of failed SMS by updating the erroneous SMSC of the at least one failed SMS by a previously used SMSC of a last successfully delivered SMS.

FIG. 5 illustrate an exemplary signalling flow diagram [500] , for retransmission of failed SMS by receiving at the SMS Sending Device, an over the air (OTA) update of correct SMSC from the network.

FIG. 6 illustrate an exemplary signalling flow diagram [600] , for retransmission of failed SMS by receiving a correct SMSC, from a cloud database, at the SMS sending device.

FIG. 7 illustrates an exemplary sequence flow diagram [700] for retransmission of failed SMS in accordance with exemplary embodiment of the present disclosure.

FIG. 8 is a schematic structural diagram of a device according to other implementations.

The foregoing shall be more apparent from the following more detailed description of the disclosure.

DESCRIPTION OF THE INVENTION

In the following description, for the purposes of explanation, numerous examples have been set forth in order to provide a brief description of the invention. It will be apparent however, that the invention may be practiced without these specific details, features and examples; and the scope of the present invention is not limited to the examples provided herein below.

The present invention provides a system and method for re-transmission of failed SMS. To enable this, the present invention re-transmits the failed SMS by updating the erroneous SMSC by identified correct SMSC.

The present invention comprises, receiving, on a SMS sending device, at least one SMS failure report via a network, wherein SMS failure is caused by an erroneous. The present invention further comprises determination of at least one failed SMS . Thereafter, the present invention comprises identification of a correct SMSC for the erroneous SMSC and updating the erroneous SMSC with said identified correct SMSC.

The present invention identifies the correct SMSC for the erroneous SMSC by at least one of, accessing the SMSC of a last successfully delivered SMS, receiving at the SMS Sending Device, an over the air (OTA) update of correct SMSC from the network and receiving a correct SMSC from a cloud database, at the SMS sending device. The present invention further stores at least the previously used SMSC of the last successfully delivered SMS and the erroneous SMSC in the memory unit.

Thereafter upon updating the erroneous SMSC by identified correct SMSC the present invention performs the first attempt to automatically re-transmit the at least one failed SMS using the identified correct SMSC.

Further the present invention comprises, receiving, on the SMS sending device, an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of the automatically re-transmitted failed SMS. The present invention further terminates if the acknowledgement signal indicates a successful delivery of said automatically re-transmitted failed SMS.

Further on receiving an acknowledgement signal indicating one of an unsuccessful delivery automatically re-transmitted failed SMS, the present invention performs the second attempt to re-transmit the failed SMS by again correcting the SMSC number using the correct identified SMSC. Further the present invention while performing said second attempt to re-transmit the failed SMS, automatically updates the erroneous SMSC by the SMSC identified by the method other than that of first attempt.

The present invention further comprises, receiving an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of said automatically re-transmitted failed SMS after said second attempt to re-transmit the failed SMS. Thereafter the present invention terminates upon receiving, on the SMS sending device, an acknowledgement signal indicating one of a successful delivery of automatically re-transmitted failed SMS.

On the other hand, on receiving an acknowledgement signal indicating an unsuccessful delivery of said automatically re-transmitted failed SMS after said second attempt, the present invention performs the third attempt to re-transmit the failed SMS. The present invention while performing the third attempt, once again updates the erroneous SMSC by said identified correct SMSC. The correct SMSC in said third attempt is identified by the method other than the previously used methods of identification of the correct SMSC implemented in first and second attempts of re-transmission of failed SMS.

The present invention further receives an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of said automatically re-transmitted failed SMS, after said third attempt to re-transmit the failed SMS. The present invention further terminates upon receiving, on the SMS sending device, an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of said automatically re-transmitted failed SMS.

Thus, the present invention comprises, maximum of three attempts to automatically re-transmit the failed SMS by updating the erroneous SMSC by identified correct SMSC. The said correct SMSC is identified by at least one of, accessing the SMSC of a last successfully delivered SMS, receiving at the SMS Sending Device, an over the air (OTA) update of correct SMSC from the network and receiving a correct SMSC from a cloud database, at the SMS sending device.

As used herein, the “SMS” refers to Short Message Service which is a type of communication used in mobile phones. The term SMS also refers to text messaging.

As used herein, the “SMSC” refers to Short Message Service Center number. The SMSC stands for "SMS center" , which is a system that manages the traffic of SMS (texts) in a mobile network. The term SMSC also stands for message center number.

As used herein, the “Memory Unit” refers to a storage area to store the data. The said Memory Unit may include a volatile or non-volatile memory. The memory unit may be random access memory, read only memory, EROM, EPROM, NVRAM etc.

As used herein, the “OTA” refers to Over the Air Update. It is a technology to update data of a device without any physical connection.

Referring to FIG. 1, an exemplary diagram of the network architecture [100] , in accordance with exemplary embodiment of the present invention is shown. As shown in Fig. 1, the system units [200 (1) ] , [200 (2) ] , [200 (3) ] … [200 (n) ] (collectively referred to as system [200] ) may be implemented in corresponding SMS sending devices [104 (1) ] , [104 (2) ] , [104 (3) ] … [104 (n) ] (collectively referred to as SMS sending devices [104] ) . The one or more SMS sending devices [104] may be connected to one or more destination devices [106 (1) ] , [106 (2) ] , [106 (3) ] … [106 (n) ] (collectively referred to as destination devices [106] ) via the network [102] , wherein the network [102] provides a path to transmit the SMS from the SMS sending devices [104] to the destination devices [106] .

The network [102] may be a wired network, a wireless network, or a combination thereof. The network [102] may be a single network or a combination of two or more networks. Further, network [102] may include, but is not limited to, personal area network, local area network, metropolitan area network, wide area network, Internet, or any combination thereof. A network may be a storage area network, virtual private network, enterprise private network or a combination thereof.

The SMS sending device [104] may be any electrical, electronic, electromechanical and computing device or equipment. The SMS sending device [104] may include, but is not limited to, a mobile phone, smart phone, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, wearable device or any other computing device which is capable of sending SMS.

The destination device [106] may be any electrical, electronic, electromechanical and computing device or equipment. The destination device [106] may include, but is not limited to, a mobile phone, smart phone, laptop, a general-purpose computer, desktop, personal digital assistant, tablet computer, wearable device or any other computing device which is capable of receiving SMS.

Although a limited number of SMS sending devices [104] and system units [200] are shown in Fig. 1, however, it will be appreciated by those skilled in the art that the invention encompasses use of multiple such SMS sending devices [104] and system units [200] . Further, although a limited number of destination devices [106] are shown in Fig. 1, the invention encompasses use of multiple such destination devices [106] .

Referring to FIG. 2, a block diagram of the system unit [200] , in accordance with exemplary embodiments of the present invention is shown. The system unit [200] comprises, at least one cloud communicator unit [202] , at least one protocol module unit [204] , at least one SMS Retry Block [206] , at least one SMS Read/Write unit [208] , at least one SMS send result observer unit [210] , at least one Memory unit [212] , at least one System Call Module [214] and at least one SMS transceiver unit [216] .

The said system unit [200] , is configured to automatically re-transmit at least one failed SMS from the at least one SMS sending device [104] to at least one Destination device [106] , wherein the failed SMS is re-transmitted after automatically updating the erroneous SMSC by at least one of identified correct SMSC.

The said system unit [200] , is further configured to automatically re-transmit the at least one failed SMS, with the help of the interconnection between the said at least one cloud communicator unit [202] , at least one protocol module unit [204] , at least one SMS Retry Block [206] , at least one SMS Read/Write unit [208] , at least one SMS send result observer unit [210] , at least one Memory Unit [212] , at least one System Call Module [214] and at least one SMS transceiver unit [216] .

The said SMS transceiver unit [216] , is configured to transmit at least one SMS from the SMS sending device [104] to Destination device [106] . The SMS transceiver unit [216] , is further configured to provide to the SMS send result observer unit [210] , at least one of the SMS success and SMS failure information/report. The SMS transceiver unit [216] , is configured to receive the at least one of the, SMS failure report and SMS success report via network [102] , at the SMS sending device [104] .

The said SMS send result observer unit [210] , is configured to determine at least one failed SMS by receiving at least one acknowledgement signal indicating an unsuccessful delivery as an SMS failure report, from the SMS transceiver unit [216] . The SMS send result observer unit [210] is further configured to determine at least one failed automatically re-transmitted failed SMS. The SMS send result observer unit [210] , further determines the at least one automatically re-transmitted failed SMS by receiving an acknowledgement signal indicating an unsuccessful delivery as an SMS failure report of said automatically re-transmitted failed SMS after each attempt of automatic re-transmission of the failed SMS by SMS retry block [206] .

The said SMS Read/Write unit [208] , is configured to read the erroneous SMSC associated with said SMS failure report and to read the identified correct SMSC. The SMS Read/Write unit [208] , is further configured to write/store, at least one of the, said erroneous SMSC and identified correct SMSC, on the said Memory unit [212] . The SMS Read/Write unit [208] , is configured to update the erroneous SMSC of the at least one failed SMS by a previously used SMSC of a last successfully delivered SMS.

The said Cloud communicator unit [202] , is configured to provide a communication link between the SMS retry block [206] and the cloud database of message center number. The cloud communicator unit [202] is further configured to provide the system unit [200] , a path to request the cloud database of message center number to get the correct message center number (SMSC) . Further, the cloud communicator unit [202] , configured to receive the correct SMSC, from the cloud database, at the SMS sending device [104] .

The said Protocol module unit [204] , is configured to get the SMSC update message from the network unit [102] . Further, the protocol module unit is configured to receive at the SMS Sending Device [104] , an over the air (OTA) update of correct SMSC from the network [102] .

The System Call Module [214] , is configured to set the SMSC from other related module of SMS Sending device. In an instance said configuration can be updated via mobile phone setting module.

The memory unit [212] is configured to store, on said SMS sending device [104] , at least, the identified previously used SMSC of the last successfully delivered SMS and the erroneous SMSC.

The said SMS retry block [206] , is configured to re-transmit the at least one failed SMS, from the SMS sending device [104] to Destination device [106] using at least one of the identified correct SMSC. The SMS retry block [206] , is further configured to provide the SMS send result observer unit [210] , at least one of, the success and failure report related to automatically re-transmitted failed SMS.

The SMS retry block [206] also receives an acknowledgement signal, indicating one of a successful delivery and an unsuccessful delivery of said automatically re-transmitted failed SMS. If the said received acknowledgement signal indicates a successful delivery, the failed SMS is successfully re-transmitted via the System Unit [200] of the SMS sending device [104] to destination device [106] . If the said received acknowledgement signal indicates an unsuccessful delivery of said automatically re-transmitted failed SMS, the System Unit [200] , will be configured to make a second attempt of the re-transmission of the said failed SMS. Further the system unit [200] , is configured to receive an over the air (OTA) update of correct SMSC from at least one network unit [102] , at said SMS sending device [104] . Further on the receipt of said OTA update, the System unit [200] of the SMS sending device [104] , sends at least one command for “Envelop SMSPP download” to SIM card via Protocol module unit [204] . Thereafter, the SIM card updates the erroneous SMSC in EF-SMSP file internally by identifying correct SMSC. Once update is completed, SIM card issues REFRESH proactive command to update the SMS sending device [104] for identified correct SMSC number. Thereafter, the identified correct SMSC is updated in the SMS sending device [104] , and said System unit [200] of SMS sending device [104] , will re-transmit via the SMS retry block [206] , the failed automatically transmitted SMS with updated identified correct SMSC.

Referring to FIG. 3, an exemplary method flow diagram [300] depicting method for re-transmission of failed SMS with respect to the present invention is shown. The invention encompasses that the method begins at step [302] . In an example, the method begins when the SMS sending device [104] , fails to deliver the SMS on the Destination device [106] via the network unit [102] .

At step [304] , the method comprises, receiving, at least one SMS failure report via at least one network unit [102] on at least one SMS sending device [104] . The said SMS failure report is received by the SMS transceiver unit [216] , of System Unit [200] , as an acknowledgement signal indicating an unsuccessful delivery of sent SMS. The SMS failure report typically comprises at least of a unique address of the SMS sending device [104] , a unique address of the SMS destination device [106] , a unique SMS message number, and an SMSC number used for sending the SMS that has failed to be delivered. The SMS failure report may also include a time-stamp of the SMS message sent from the SMS sending device [104] . The SMS failure report is received when the SMS sending device [104] sets a flag in the SMS message to indicate that it wishes to receive an acknowledgement or SMS message delivery report.

Thereafter, at step [306] , the method comprises, determining, at least one failed SMS message and a message center number (SMSC) associated with said SMS failure report. This includes parsing the SMS failure report to identify the unique SMS message number and the SMSC number. Thereafter, the SMS message associated with said unique SMS message number is identified. Since the SMS failure report is received at the SMS sending device [104] indicating the failure of SMS message delivery, said determined SMSC may be an erroneous SMSC. The invention encompasses checking if the identified SMSC number is an erroneous SMSC. The said erroneous SMSC is determined via SMS Read/Write unit [208] , which is configured to read message center number (SMSC) associated with said SMS failure report.

Further, after the determination of the said failed SMS, the method further leads to step [308] . At step [308] , the method comprises, identifying a correct SMSC for said erroneous SMSC. The said correct SMSC is further identified by at least one of, accessing the SMSC of a last successfully delivered SMS, receiving at the SMS Sending Device, an over the air (OTA) update of correct SMSC from the network unit [102] and receiving a correct SMSC from a cloud database, at the SMS sending device [104] .

The SMSC of a last successfully delivered SMS is further identified by the SMS Read/Write unit [208] . The said SMS Read/Write unit [208] is connected with the Memory Unit [212] , which is further configured to store at least, the previously used SMSC of the last successfully delivered SMS and the erroneous SMSC.

Further, for the identification of the correct SMSC, an over the air (OTA) update of correct SMSC from the network unit [102] may be received by the System Unit [200] , upon failure of the sent SMS. Thereafter, on the receipt of said OTA update, the System unit [200] of the SMS sending device [104] , sends at least one command for “Envelop SMSPP download” to SIM card via Protocol module unit [204] . Further, the SIM card updates the erroneous SMSC in EF-SMSP file internally by identifying correct SMSC. Once update is completed, SIM card issues REFRESH proactive command to update the SMS sending device [104] about the identified correct SMSC number.

The identification of the correct SMSC may be achieved by receiving a correct SMSC from a cloud database, at the SMS sending device [104] . This includes sending at least one query to get the correct SMSC from the SMS sending device [104] to the cloud database and thereafter receiving at the SMS sending device [104] , the identified correct SMSC from the cloud database of the message center number.

The method further at step [310] comprises, updating the erroneous SMSC by identified correct SMSC. The SMS Read/Write unit [208] , of the System Unit [200] is configured to automatically update the erroneous SMSC of the at least one failed SMS by the identified correct SMSC.

The method further leads to step [312] . At step [312] , the method is configured to automatically re-transmit the at least one failed SMS using the identified correct SMSC. The said automatic re-transmission of the said failed SMS is achieved by the SMS retry block [206] .

After the automatic re-transmission of the at least one failed SMS, the System Unit [200] , receives an acknowledgement signal via SMS retry block [206] , indicating one of a successful delivery and an unsuccessful delivery of said automatically re-transmitted failed SMS. The said method further terminates at step [314] , after said automatic re-transmission of failed SMS.

Referring to Fig. 4, an exemplary signaling flow diagram [400] , for retransmission of failed SMS by updating the erroneous SMSC of the at least one failed SMS by a previously used SMSC of a last successfully delivered SMS is shown in accordance with the present invention.

At step [402] , the SMS Sending device [104] , is configured to Send SMS message to destination device [106] via network unit [102] . Next, at step [404] , the sent SMS may be transmitted along with the SMS PDU. The said SMS Protocol data Unit (PDU) , further includes Message center number associated with the said sent SMS, protocol specific information and user data transmitted over network.

Thereafter, at step [406] , the network Unit [102] , may receive the SMS sent by said SMS Sending device [104] . Further the said network unit [102] at step [406] , may check the SMS PDU associated with the said sent SMS and identify that the SMSC number associated with the sent SMS is wrong.

Further at step [408] , the network unit [102] , then sends SMS fail response to the said SMS Sending device [104] .

Thereafter, on receiving SMS fail response from the network unit [102] , said SMS Sending device [104] , on step [410] , gets the last used SMSC associated with the last successfully delivered SMS. The said last used SMSC associated with the last successfully delivered SMS is stored at the memory unit [212] of the System Unit [200] via the SMSC Read/Write Unit [208] . Further the SMSC Read/Write Unit [208] , updates the wrong SMSC by the SMSC of last successfully delivered SMS.

At step [412] , the SMS Sending device [104] sends the SMS again by using the updated SMSC of last successfully delivered SMS. Further, at step [414] the SMS is transmitted from the SMS Sending device [104] to the network unit [102] . Thereafter, at step [416] the network unit [102] transmits the sent SMS with updated correct SMSC to the Destination device [106] .

At step [418] , the Destination device [106] , upon receiving the sent SMS from the SMS Sending device [104] , sends an acknowledgement signal to the network unit [102] . The network unit [102] , thereafter at step [420] sends a delivery report as successful to the SMS Sending device [104] .

Referring to Fig. 5, an exemplary signalling flow diagram [500] , for retransmission of failed SMS by receiving at the SMS Sending Device, an over the air (OTA) update of correct SMSC from the network is shown in accordance with the present invention.

The SMS Sending device [104] , comprises a SIM card, the said SIM card configured to send at least one SMS from the SMS sending device [104] to the Destination device [106] , as shown in [502] . At step [504] , the SMS sending device [104] , may send SMS message to Mobile Switching Center (MSC) [506] . The MSC [506] further at step [508] , forwards SMS message to SMS -IWMSC [510] . The said IWMSC stands for Inter Working Mobile Switching Center and is configured to receive the SMS and to submit the SMS to the appropriate SMSC.

At step [512] , the SMS -IWMSC [510] , may send an SMS fail response to the MSC [506] and the said MSC [506] further at step [514] , configured to send ‘SMS Fail due to wrong message center number’ response to the SMS sending device [104] .

Further at step [516] , the MSC [506] via a network may send the SMS to SIM card installed in said SMS sending device [104] for SMSC OTA update. The SMS sending device [104] further at step [518] , is configured to send the command for “Envelop SMSPP download” to SIM card. The said Envelop SMSPP download command is to download data via SMS Point-to-Point. The said command is issued from the SMS sending device [104] to the SIM card when network sends any data to update SIM card.

Then SIM card at step [520] , is further configured to update the SMSC in EF-SMSP file internally. The said EF-SMSP is an elementary file in SIM card, which further stores SMSC in the said SIM card. Thereafter, at step [522] , the SMS sending device [104] may update internal SMSC cache in SIM card. Further, upon completion of said update, the SIM card at step [524] , may issue a REFRESH –FCN proactive command with EF-SMSP file to update the SMS sending device [104] for SMSC number. The said FCN stands for File change notification and it is a type of REFRESH Proactive command sent from the SIM card.

Further, at step [526] , the SMS sending device [104] , is configured to send the SMS message again, using the updated SMSC, to Mobile Switching Center (MSC) [506] . The MSC [506] further at step [528] , forwards this SMS message to SMS -IWMSC [510] . Thereafter, at step [530] , the SMS -IWMSC [510] , may send the SMS to the Short Message Service Center (SMSC) .

The SMSC at step [532] , further sends the SMS to the destination device [106] . Thereafter, on successful transmission of the said SMS the SMS -IWMSC [510] , at step [534] , sends an acknowledgement signal to Mobile Switching Center (MSC) [506] . The MSC [506] , after receiving the acknowledgement signal from SMS -IWMSC [510] , further at step [536] , may send a delivery report as successful to the SMS Sending device [104] .

Referring to Fig. 6, an exemplary signalling flow diagram [600] , for retransmission of failed SMS by receiving a correct SMSC, from a cloud database, at the SMS sending device is shown in accordance with the present invention.

At step [602] , the SMS sending device [104] is configured to send SMS to the network unit [102] . Thereafter at step [604] , the said network unit [102] is further configured to send an ‘SMS Fail due to wrong Message Center Number (SMSC) ’ response, to the SMS sending device [104] .

Further, on receiving the ‘SMS Fail due to wrong Message Center Number (SMSC) ’ response, the SMS sending device [104] at step [606] , sends a query to the cloud database of message center number, in order to get the correct SMSC. Further in response to the said query, the cloud database at step [608] is further configured to provide the correct message center number to the SMS sending device [104] .

The SMS sending device [104] , at step [610] , is further configured to send the SMS again, using the correct SMSC received from said cloud database, to the network unit [102] . Thereafter, the network unit [102] , at step [612] , further sends the SMS to the destination device [106] . At step [614] , the Destination device [106] , upon receiving the sent SMS from the SMS Sending device [104] , further configured to send an acknowledgement signal to the network unit [102] . The network unit [102] , thereafter at step [618] , configured to send a delivery report as success to the SMS Sending device [104] .

Referring to Fig. 7, an exemplary sequence flow diagram [700] for retransmission of failed SMS in accordance with exemplary embodiment of the present disclosure is shown.

At step [702] , the SMS sending unit [104] is configured to send SMS to the Destination device [106] via network unit [102] . At step [704] , the system unit [200] is configured to check the SMS status, and if the SMS is transmitted successfully, the sequence flow will follow the pass indication and leads to the step [706] and terminates. Further, at step [704] , if the SMS is not transmitted successfully, the sequence flow will follow the fail indication and leads to the step [708] .

Further at step [708] , the system unit [200] is configured to update the erroneous SMSC of the at least one failed SMS by a previously used SMSC of a last successfully delivered SMS.

After updating the erroneous SMSC by a previously used SMSC of a last successfully delivered SMS, the System Unit [200] , at step [710] , is configured to automatically re-transmit the at least one failed SMS using the identified correct SMSC.

Further, at step [712] , the system unit [200] is configured to check the SMS status, and if the SMS is transmitted successfully, the sequence flow will follow the pass indication and leads to the step [714] and terminates. Further, at step [712] , if the SMS is not transmitted successfully, the sequence flow will follow the fail indication and leads to the step [716] .

At step [716] , the system unit [200] , is configured to receive at the SMS Sending Device [104] , an over the air (OTA) update of correct SMSC from the network unit [102] . Thereafter, the system unit [200] , at step [718] , automatically re-transmits the at least one failed SMS using the identified correct SMSC via OTA update.

The system unit [200] , at step [720] , is configured to again check the SMS status, if the SMS is transmitted successfully, the sequence flow will follow the pass indication and leads to the step [722] and terminates. Further, at step [720] , if the SMS is not transmitted successfully, the sequence flow will follow the fail indication and leads to the step [724] .

Thereafter, at step [724] , the system unit [200] , is configured to receive a correct SMSC, from a cloud database, at the SMS sending device [104] and at step [726] , the system unit [200] may automatically re-transmit the at least one failed SMS using the correct SMSC identified via cloud database.

Further, the system unit [200] , at step [728] , is configured to once again check the SMS status, if the SMS is transmitted successfully, the sequence flow will follow the pass indication and leads to the step [730] and terminates. Further, at step [728] , if the SMS is not transmitted successfully, the sequence flow will follow the fail indication and leads to the step [732] . Thereafter, on unsuccessful delivery of failed SMS, all the attempts to automatically retransmit the failed SMS exhausted at step [732] and the method terminates.

Although methods of identifying correct SMSC are discussed with reference to Figure 7 in a particular order, i.e. first attempt to identify correct SMSC using previously used SMSC of a last successfully delivered SMS, followed by second attempt to correct SMSC by an over the air (OTA) update from the network unit [102] , and the third attempt to correct the SMSC by receiving SMSC from cloud database. It will however, be appreciated by those skilled in the art that these methods may be used in any sequence and the same is within the scope and ambit of the present invention.

Therefore, as evident from the above description, the invention provides significant technical advancement in the field of SMS message delivery by identifying a SMS message delivery failure, automatically identifying the cause of such failure, i.e. incorrect SMSC number, and subsequently and automatically identifying a correct SMSC number and automatically re-transmitting the SMS message using the correct SMSC number. Thus, use of the present invention obviates the need of a user to identify the cause of failure of SMS message delivery and to manually correct the SMSC number.

FIG. 8 is a schematic structural diagram of a device according to other implementations. The device includes a processor 801, a memory 802, a communication interface 803, and one or more programs stored in the memory and executed by the processor. The one or more programs when executed by the processor are operable with the processor to perform the following operations. At least one SMS failure report is received, where SMS failure is caused by an erroneous message center number (SMSC) . At least one failed SMS associated with the SMS failure report is determined. A correct SMSC for the erroneous SMSC is identified. The erroneous SMSC is updated by identified correct SMSC. The at least one failed SMS is automatically re-transmitted using the identified correct SMSC.

In some implementations, the one or more computer programs operable with the processor to identify the correct SMSC for the erroneous SMSC are operable with the processor to at least one of: access an SMSC of a last successfully delivered SMS; receive an over the air (OTA) update of a correct SMSC from the network; receive a correct SMSC, from a cloud database.

In some implementations, the one or more computer programs operable with the processor to access the SMSC of the last successfully delivered SMS are operable with the processor to: detect at least one last successfully delivered SMS and a previously used SMSC of the at least one last successfully delivered SMS; store the previously used SMSC of the at least one last successfully delivered SMS.

In some implementations, the one or more computer programs operable with the processor to receive an over the air (OTA) update of correct SMSC from the network unit [106] are operable with the processor to: receive the OTA message from the network unit [106] ; update the erroneous SMSC in elementary file in subscriber identity module card (EF-SMSP) file in at least one SIM card of the device based on the received OTA message.

In some implementations, the one or more computer programs operable with the processor to receive the correct SMSC, from the cloud database are operable with the processor to: send to the cloud database, at least one query to get the correct SMSC; receive from the cloud database, the correct SMSC

In some implementations, the one or more computer programs are further operable with the processor to receive an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of the automatically re-transmitted failed SMS.

Claims

A method for re-transmission of failed SMS, the method comprising:

receiving, by a short message service (SMS) sending device [104] , at least one SMS failure report via a network unit [102] , wherein SMS failure is caused by an erroneous message center number (SMSC) ;

determining, at least one failed SMS associated with the SMS failure report;

identifying a correct SMSC for the erroneous SMSC;

updating the erroneous SMSC by identified correct SMSC; and

automatically re-transmitting the at least one failed SMS using the identified correct SMSC.
The method of claim 1, wherein identifying the correct SMSC for the erroneous SMSC is achieved by at least one of:

accessing an SMSC of a last successfully delivered SMS,

receiving, by the SMS sending device [104] , an over the air (OTA) update of a correct SMSC from the network unit, and

receiving, by the SMS sending device [104] , a correct SMSC, from a cloud database.
The method of claim 2, wherein accessing the SMSC of the last successfully delivered SMS, comprises:

detecting, by the SMS sending device [104] , at least one last successfully delivered SMS and a previously used SMSC of the at least one last successfully delivered SMS; and

storing, by the SMS sending device [104] , the previously used SMSC of the at least one last successfully delivered SMS.
The method of claim 2, wherein receiving, by the SMS Sending Device [104] , an over the air (OTA) update of correct SMSC from the network unit [106] comprises:

receiving, by the SMS sending device [104] , the OTA message from the network unit [106] ; and

updating the erroneous SMSC in an elementary file in subscriber identity module card (EF-SMSP) file in at least one SIM card of the SMS sending device [104] based on the received OTA message.
The method of claim 4, wherein updating the erroneous SMSC in the EF-SMSP file in at least one SIM card of the SMS sending device [104] based on the received OTA message comprises:

generating a command for envelop SMS point-to-point (SMSPP) download based on the received OTA message, wherein the command is for instructing the at least one SIM card to update the erroneous SMSC in the EF-SMSP file; and

generating a refresh proactive command to update a database for SMSC number of the SMS sending device [104] , after the the erroneous SMSC in the EF-SMSP file is undated.
The method of claim 2, wherein receiving the correct SMSC, from the cloud database, by the SMS sending device [104] , comprises:

sending, from the SMS sending device [104] to the cloud database, at least one query to get the correct SMSC; and

receiving, by the SMS sending device [104] from the cloud database, the correct SMSC.
The method of any of claims 1 to 6, further comprising:

receiving, by the SMS sending device [104] , an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of the automatically re-transmitted failed SMS.
A device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory which are stored in the memory, which, when executed by the processor, are operable with the processor to:

receive at least one SMS failure report, wherein SMS failure is caused by an erroneous message center number (SMSC) ;

determine, at least one failed SMS associated with the SMS failure report;

identify a correct SMSC for the erroneous SMSC;

update the erroneous SMSC by identified correct SMSC; and

automatically re-transmit the at least one failed SMS using the identified correct SMSC.
The device of claim 8, wherein the one or more computer programs operable with the processor to identify the correct SMSC for the erroneous SMSC are operable with the processor to at least one of:

access an SMSC of a last successfully delivered SMS;

receive an over the air (OTA) update of a correct SMSC from network; and

receive a correct SMSC, from a cloud database.
The device of claim 9, wherein wherein the one or more computer programs operable with the processor to access the SMSC of the last successfully delivered SMS are operable with the processor to:

detect at least one last successfully delivered SMS and a previously used SMSC of the at least one last successfully delivered SMS; and

store the previously used SMSC of the at least one last successfully delivered SMS.
The device of claim 9, wherein the one or more computer programs operable with the processor to receive an over the air (OTA) update of correct SMSC from the network are operable with the processor to:

receive the OTA message from the network; and

update the erroneous SMSC in elementary file in subscriber identity module card (EF-SMSP) file in at least one SIM card of the device based on the received OTA message.
The device of claim 11, wherein the one or more computer programs operable with the processor to update the erroneous SMSC in the EF-SMSP file in at least one SIM card of the device based on the received OTA message are operable with the processor to:

generate a command for envelop SMS point-to-point (SMSPP) download based on the received OTA message, wherein the command is configured to instruct the at least one SIM card to update the erroneous SMSC in the EF-SMSP file; and

generate a refresh proactive command to update a database for SMSC number of the SMS sending device [104] , after the the erroneous SMSC in the EF-SMSP file is undated.
The device of claim 9, wherein the one or more computer programs operable with the processor to receive the correct SMSC, from the cloud database are operable with the processor to:

send to the cloud database, at least one query to get the correct SMSC; and

receive from the cloud database, the correct SMSC.
The device of any of claims 1 to 13, wherein the one or more computer programs are further operable with the processor to:

receive an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of the automatically re-transmitted failed SMS.
A system [200] for re-transmission of failed SMS, the system comprising:

a SMS transceiver unit [216] , configured to receive, on a SMS sending device [104] , at least one SMS failure report via a network;

a SMS send result observer unit [210] connected to the transceiver unit [216] , configured to determine, at least one failed SMS;

a SMSC read/write unit [208] connected to a memory unit [212] and the SMS send result observer unit [210] , configured to read message center number (SMSC) associated with the SMS failure report, wherein the determined SMSC is an erroneous SMSC; and

a SMS retry block [206] connected to the SMSC read/write unit [208] and the SMS send result observer unit [210] , the SMS retry block [206] configured to, automatically re-transmit the at least one failed SMS using an identified correct SMSC.
The system [200] of claim 15, wherein the SMS read /write unit [208] is further configured to update the erroneous SMSC of the at least one failed SMS by a previously used SMSC of a last successfully delivered SMS.
The system [200] of claim 15 or 16, wherein the system [200] further comprises a protocol module [204] configured to receive at the SMS Sending Device [104] , an over the air (OTA) update of correct SMSC from the network.
The system [200] of any of claims 15 to 17, wherein the system [200] further comprises a cloud communicator [202] configured to receive a correct SMSC, from a cloud database, at the SMS sending device [104] .
The system [200] of any of claims 15 to 18, wherein the memory unit [212] is configured to store, on the SMS sending device [104] , at least the previously used SMSC of the last successfully delivered SMS and the erroneous SMSC.
The system [200] of any of claims 15 to 19, wherein the SMS retry block [206] is further configured to receive an acknowledgement signal indicating one of a successful delivery and an unsuccessful delivery of the automatically re-transmitted failed SMS.