KR100212485B1 - The short message processing method of a cellular system - Google Patents

Abstract

The present invention relates to a short message (SM) of a cellular message teleservice (CMT) in a short message service-message center (SMS-MC) of a CDMA mobile system (CMS) network. ) Protocol processing. In the present invention, in order to process the incoming message of the cellular message teleservice, the routing information of the called party is found from the home location register (HLR), and the short message is transmitted to the called mobile switching center (MSC) according to the information. To allow the recipient to reach a short text. There are three kinds of incoming messages, such as SM_Delivery, SM_DeliveryAck, and SM_UserAck. In the present invention, SM_Delivery is selected as a representative incoming message that can be used in three messages, and a procedure and method for processing the message are presented. In addition, a protocol machine having a table structure is used to process the SM_Delivery message so that an error can be minimized and a structure can be easily changed.

Description

How to handle incoming short protocol in cellular message teleservice

The present invention relates to a protocol control unit of a mobile communication network based on the No. 7 protocol, and to implementing a processing protocol machine for a cellular message teleservice reception of a mobile station passing through a MAP layer and a teleservice layer in a short service message center. It is about. Incoming message types of cellular message teleservices include SN_Delivery, SM_ DeliveryAck, and SM_UserAck, all of which belong to the teleservice layer, which conforms to the US EIA / TIA standard IS-637 and is a lower layer of teleservice. In MAP (Mobile Application Part) which is a kind of transport layer. The short service center of the CDMA mobile network system (CMS) is designed and implemented in accordance with the CDMA Developers Group (CDG) standard.

Accordingly, the present invention is provided with a service node called a short message service-message center to provide short text service in a CDMA digital mobile communication network and performs a stored-and-forward function of short text. The short service message center includes a protocol processing unit and an application unit that performs a function of storing and transmitting a message, and communicate with each other through an IPC socket. The present invention encodes the cellular message teleservice incoming message to the called party in the protocol processing unit, and encodes it to the IS-637 teleservice layer, and then encodes it to the lower layer MAP to transmit and receive the message to the terminating mobile communication exchange (MSC). do. Since the length of the cellular message teleservice message may exceed the limit defined by the TCAP message, in this case, we added a split transmission process and changed the state of the called station from the home location registrar to retransmit when the called party is available. To be recognized. In order to process the protocol for cellular message teleservice reception, the program organization table (PAT) using state-transition-diagram is used to create a protocol machine dedicated to mobile station origination to improve the understanding of the program and reduce the occurrence of errors. Let's do it.

In order to achieve the above object, the method for processing an incoming short protocol of a cellular message teleservice according to the present invention indicates that another transaction has been started in the entire transaction table and allocates a new transaction when a short transmission request event occurs in a short transmission waiting state. Receiving step, and if the transaction is assigned, encoding to correspond to the teleservice message, and if an encoding success event occurs in the encoding standby state to find the routing information for the called party called routing information response to the home location register Waiting for a response from the home location register after transmitting the MAP message; if the encoding fails, performing an error handling routine and ending the transaction; and if the routing information response is successful in the waiting for the routing information response, Cellular message Encoding the service message to the MAP layer and transmitting the MAP message to the destination MSC; if a request for routing information for the incoming call fails, handling the corresponding error, recovering the transaction, and ending the execution; Transmitting the next message to be sent to the destination MSC and returning to the response waiting state when the MAP message requesting the continuous transmission request is received in the short transmission response waiting state, and a response event for the short transmission occurs. If the result is transmitted to the AP block, returning to the initial state of the short transmission standby state, and if an error of the short transmission is notified, creating a short waiting message to the home location register and transmitting the same; In response to a short wait while a short waiting response is received, the corresponding SAP information is displayed. Returning to the initial state after notifying the block, and if the short wait fails, transmitting the corresponding information to the SAP block, and then returning to the initial state. For a method of processing an incoming short protocol of a service, refer to a first step of checking the meaning of an event from a start signal, and a program scheduling table for processing an incoming short protocol of a cellular message teleservice when a meaningful event is generated from the first step. A second step of checking whether the event can be generated in the current state, and if the generated event from the second step is not an event registered in the table, changing the current state and increasing the state value. Checking again from the third step; A fourth step of performing a corresponding execution when a registered event is found; a fifth step of receiving an event as a result of the execution from the fourth step and performing the event until the event is meaningless; and from the third step, And a sixth step of terminating program execution if the event is meaningless or the generated event is not registered in the table. In addition, when the length of the cellular message teleservice message exceeds the limit defined by the TCAP message, the home location register recognizes a change in state of the called station so that retransmission is performed when the called party cannot receive the call. Characterized in that configured to be possible. When the state information is in the cellular message teleservice transmission wait state, the event information requires the short message transmission, the execution function information encodes the short teleservice layer, and the next state information keeps the short reception wait state. In addition, when the status information is in a short transmission message encoding wait state, event information confirms encoding success and failure, execution function information performs receiver routing information request error processing, and the next status information is waiting for routing information response and cellular message telephony. Keep waiting for service transmission. If the status information is in the routing information response waiting state, the event information causes the routing information response and the routing information error response to be executed, and the execution function information transmits the short message to the destination MSC and processes the error, and the next status information waits for the short transmission response. It maintains status and waiting status for short transmission. In addition, when the status information is in a short transmission response wait state, the event information requires a continuous transmission request, a short transmission success response, and a short transmission failure response, and the execution function information is divided into a transmission, a transmission result sent to SAP, and a short message to a home location register. The pending message notification is executed, and the following status information keeps the short transmission response waiting state, the cellular message teleservice transmission waiting state, and the short waiting response waiting state. If the status information is a short waiting response, the event information requests an SSW response, the execution function information sends a transmission result to SAP, and the next status information is to maintain the cellular message teleservice transmission waiting status. It features.

1 is a structural diagram of a CDMA mobile communication network to which the present invention is applied.

2 is a block diagram of a short service message center used in the present invention.

3 is a state transition diagram for processing an incoming short protocol of a cellular message teleservice.

4 is a structure and configuration diagram of a program organization table for processing an incoming short protocol of a cellular message teleservice.

5 is a flow chart for control via PAT with a protocol machine engine.

* Explanation of symbols for main parts of the drawings

101: mobile communication terminal 102: BST / BSC

103: mobile communication exchange 104: VLR

105: HLR / AC 106: Short Message Service Center

107: PSTN 108: PSPDN

201: Message Center 202: IP

203: IN 204: short message service

300: SAP block 303: prototype machine

304: TCAP Transceiver

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a structural diagram of a CDMA mobile communication network to which the present invention is applied. The CDMA mobile communication network has a form in which a short service message center 106 is added to a CDMA digital cellular system. The mobile communication terminal 101 is a mobile subscriber station supporting an IS-637 short service protocol processing function, an EIA-232-EI / F function with a PC, and a man-machine interface (MMI) function for a short service, and a BTS 102 ) Supports short message transmission and reception through access / paging channels. In addition, the BSC 102 supports a function of transmitting and receiving a short message through a traffic channel, converting and converting a data burst message into a short message, and processing a service option. The mobile communication exchange 103 performs transport protocol processing function for IS-637 short service, representative number identification and connection function of the short service message center, relay call processing from the PSTN 107 to the short service center, and trunk connection function. to provide. The VLR (Visiter Location Register) 104 performs the function of authenticating short message outgoing subscribers, retrieving short service subscriber information on incoming and outgoing short messages, routing to the incoming short service center, and location registration of incoming and outgoing subscribers whose location is not registered. do. The HLR / AC (Home Location Register / Authentication Center) 105 supports mobile subscriber information management function, routing information management function, short service charging classification function, short service authentication function, and short message reception notification function of the called terminal. The short service message center 106 is connected to the mobile communication exchange 103 and the VLR 104 and the HLR / AC 105 and the No. It is connected by 7 signaling schemes and uses the mobile communication MAP protocol 109 based on it. It is also connected to the PSPDN network 108 via X.25 or Ethernet protocols for matching with short service providers.

2 is a block diagram of the short service message center used in the present invention, and shows the platform structure of the short service message center.

The Short Message Service Center is designed to allow four computer systems with UNIX System V to be connected to the LAN and to be easily added based on capacity. IP (Intelligent Peripheral) 202 has special resources such as announcement broadcaster, voice / language synthesis and recognition device, DTMF digit receiver, tone generator, MF tone generator, etc., customized to support input and output of various information to PSTN subscriber. Provide flexible interaction between user and network. The IN (Intelligent Network: 203) provides the No.7 protocol stack for the No.7 signaling network and the No.7 operation management unit, and handles the CDMA mobile network MAP protocol and the teleservice layer protocol using the TCAP API, Send and receive data to and from the message center 201 connected to it. The message center 201, which handles short service logic, consists of short service application functions using a short message database, and provides X.25 and Ethernet interfaces to support PSPDN external service provider matching. Short service OAM (Operating and Maintenance) 204 performs operational maintenance functions such as state management and configuration management of these systems.

3 is a state transition diagram for processing an incoming short protocol of cellular message teleservice, wherein the protocol machine 303 dedicated to short delivery processing for cellular message teleservice is a cellular message teleservice from SAP block 300. FIG. It is operated by receiving the delivery request signal 301. When a short transmission request event occurs in the short transmission wait state 305 (306), the other transaction is notified to the entire transaction table and a new transaction ID is allocated (307). After the transaction ID is assigned, the message is encoded to correspond to the teleservice message (307). When an encoding success event occurs in the encoding wait state 308 from the teleservice layer 309, a MAP message called routing information response 314 is sent to the fault location register to find out routing information for the called party. And waits for a response from the home location register (311). For example, if the encoding from the teleservice layer fails, the transaction is terminated after performing the error handling routine 310 (305). Meanwhile, if the routing information response is successful (314) in the routing information response waiting state (311), the cellular message teleservice message is encoded into the MAP layer to transmit a MAP message called Convey SM to the destination MSC (315). If the request for routing information for the incoming call has failed (312), an error is processed, the transaction is recovered, and the execution is finished (313). In the short transmission response waiting state 316, when a MAP message that desires a continuous transmission request is received (317), the next message to be transmitted is transmitted to the destination MSC (318), and the response wait state 316 is returned thereto. When a response event for the short message is generated (319), the result is transmitted to the SAP block 300 (320), and the state is returned to the short state of the short transmission state 305, which is an initial state. If the short message is notified of an error (321), the home location register creates and transmits a SetSMWaiting MAP message, which is a short message waiting, to be sent (322). In response to the short wait in the short waiting response response state 323, when the response to the short waiting is received (324), the corresponding information is notified to the SAP block 301, and then the initial state is set (325). After sending to block 300 (325) it returns to the initial state.

4 is a structure and configuration diagram of a program organization table for processing an incoming short protocol of a cellular message teleservice, and includes state information 401 having index information and event information 402 representing an event that may occur when a protocol machine is executed. ), Execution function information 403 to handle this when an event occurs, and next state information 404 with next state information that may occur after execution. The initial value of the table for cellular message teleservice terminating protocol processing is configured as shown in FIG. 4, which is a representation of the table for FIG.

5 is a flowchart for controlling through the PAT with the protocol machine engine. The protocol machine engine is operated with four parameters: an event occurred, a current table state, a transaction ID, and void * type data. First, the process proceeds to step 502, which identifies the meaning of the event from the start (step 501) signal. If a meaningful event has occurred (step 503), the process proceeds to step 505, where it is referred to the table shown in FIG. 4 to check whether the event can be generated in the current state. If the generated event is not the event registered in the table, the current state is changed (step 507) and the matching event is checked again while increasing the state value (step 508). If a registered event is found (step 510), the process proceeds to step 512 to perform the execution. The event is received as a result of the execution and is performed until the event is meaningless (step 5-A). In addition, if the event is not meaningful or the generated event is not registered in the table, the program execution ends.

The present invention has been made on the HP-ux 9.07 OS of the HP Telepace 9000-700 series system with an IN (Intelligent rework) in hardware. 7 For the protocol support, MTP1 / MTP2 layer is supported as hardware protocol and MTP3 / SCCP / TCAP layer is supported in software so that application programs can be implemented. The protocol machine for cellular message teleservice incoming processing implemented in such a system consists of the PAT table shown in FIG. 4 and the PAT control routine shown in FIG. In order to operate the PAt control routine, implementation of the MAP layer and the teleservice layer must be preceded. The protocol machine thus made is compatible with any system with different hardware, and the well-configured PAT can reduce system errors.

The present invention relates to the implementation of a protocol machine for SM_Delivery processing of incoming messages of cellular message teleservices. The effect of the present invention is to implement a protocol machine dedicated to incoming processing for cellular message teleservice in a short service message center, thereby reducing complexity, and such a method gives an effect of easily accommodating the change of protocol. In addition, the present invention can easily implement a protocol machine for a type of short service such as CPT (Cellular Paging Teleservice) or VMN (Voice Mail Notification).

Claims (9)

In the method of processing the incoming short protocol of cellular message teleservice, when the short transmission request event occurs in the short transmission waiting state, the other transaction is notified to the entire transaction table and a new transaction is allocated; Encoding to correspond to the teleservice message, and when the encoding success event occurs in the encoding standby state, and sends a MAP message called the routing information response to the home location register to find out the routing information for the called party from the home location register Waiting for a response to the step; if the encoding fails, performing an error handling routine and ending a transaction; if the routing information response is successful in the routing information response wait state, encoding a cellular message teleservice message to the MAP layer Sending a MAP message to the destination MSC, handling a corresponding error if the request for routing information for the destination fails, terminating the execution after recovering the transaction, and continuing in a short transmission response wait state. When the MAP message requesting transmission request is received, transmitting the next message to be transmitted to the destination MSC and returning to the response waiting state again, and when the response event for the short transmission occurs, the AP block results. Returning to a short transmission standby state which is an initial state after transmitting the message, and if a short message is notified of the short transmission, creating a short waiting message to the home location register and transmitting the short waiting message; When a response to a short wait is received, the information is notified to the SAP block and then returned to its initial state. The steps and, the short message forwarding the short protocol processing method of a cellular message teleservice which comprises the information when the air fails, the step of returning to the initial state after transmission to the SAP block. 2. The method of claim 1, wherein if the length of the cellular message teleservice message exceeds a threshold defined by a TCAP message, the cellular message teleservice message is divided and transmitted. 2. The method of claim 1, wherein the home location register is configured to recognize a change in state of the called station so that retransmission is possible when the called party is available in the unreachable state. . 2. The method of claim 1, wherein when the state information is a cellular message teleservice transmission wait state, event information requires a short message transmission, execution function information encodes a short teleservice layer, and the next state information indicates a short reception wait state. A method for processing an incoming short protocol in a cellular message teleservice, characterized by maintaining. 2. The method of claim 1, wherein when the status information is a short transmission message encoding wait state, event information confirms encoding success and failure, execution function information performs receiver routing information request error processing, and next status information responds to routing information. A method for processing an incoming short protocol in a cellular message teleservice, characterized by maintaining a standby and cellular message teleservice transmission waiting state. The method according to claim 1, wherein when the status information is in a waiting status for a response to a routing information response, event information causes a routing information response and a routing information error response to be executed, and execution function information causes a short message to be transmitted and error-processed to the destination MSC. The method of claim 1, wherein the short message transmission waiting state and the short message waiting state are maintained. The method of claim 1, wherein when the status information is in a short transmission response wait state, the event information requires a continuous transmission request, a short transmission success response, and a short transmission failure response. The short message waiting notification is performed by the home location register, and the following status information is used to maintain the short message waiting response status, the cellular message teleservice transmission waiting status, and the short message waiting response status. How to handle incoming short protocol. The method of claim 1, wherein when the status information is a short waiting response, the event information requires an SSW response, the execution function information is to transmit a transmission result to SAP, and the next status information is a cellular message teleservice transmission waiting status. A method of processing an incoming short protocol of cellular message teleservice, characterized in that to maintain. A method for processing an incoming short protocol of a cellular message teleservice, comprising: a first step of identifying a meaning of an event from a start signal; and a method of processing an incoming short protocol of a cellular message teleservice when a meaningful event is generated from the first step. A second step of checking whether the event may occur in the current state by referring to the program organization table; and changing the current state and changing the state value if the event generated from the second step is not an event registered in the table. Receiving the event as a result of the execution and the third step of re-confirming the matching event while increasing, the fourth step of performing the execution when the registered event is found from the third step; A fifth step of doing this until the event is meaningless, and the third step Emitter short message forwarding protocol processing method of the event generating means, or if the event is not registered in the table, characterized in that formed in the sixth step to terminate processing program cellular message teleservice.