CN101203026B - Method for taking over call based on password in C network for implementing incoming call filtering - Google Patents

Abstract

A method of receiving a call based on a password in C network to realize incoming call screening, including the originating user initiates a call, and the MSC guides the call to the SCP according to the subscription information of the called number; the SCP assigns a fixed TLDN code to the IP, and instructs The originating MSC is connected to the IP, and the IP collects the user password information and sends the password to the SCP, and the SCP screens incoming calls according to the password entered by the user; the originating MSC guides the call to the called user according to the user number returned by the SCP, and establishes a normal call ;By reducing the number of interactions between IP and SCP in the second stage, simplifying TLDN allocation, and simplifying the processing flow of SCP in C network, the processing efficiency of SCP in C network can be greatly improved when processing ICS-receiving call flow according to password .

Description

Method for Receiving Calls Based on Passwords in Realizing Incoming Call Screening in C Network

technical field

The invention relates to the field of data communication, in particular to a method for receiving a call according to a password in an ICS (Incoming Call Screening Incoming Call Screening Service) implemented in a C network intelligent network.

Background technique

First of all, let me introduce some technical terms in this manual and the accompanying drawings:

SCP: Service Control Point, which is the core component of the intelligent network, stores user data and business logic; the main function of SCP is to receive query information from SSP and query the database, and perform various decoding; at the same time, SCP SSP reports various call events to start different business logic, and sends call control commands to SSP according to different business logic, so as to realize various intelligent calls;

MSC: Mobile Switching Center Mobile Switching Center;

HLR: Home Location Register home address register;

IP: Intelligent Peripheral;

VLR: Visitor Location Register visit address register;

SIM: Service Interactions Manager business interaction management;

WIN: Wireless Intelligent Network wireless intelligent network;

SRF: Special Resource Function special resource function;

ICS: Incoming Call Screening incoming call screening service;

The following signaling message terms are:

SEIZERES: SeizeResource INVOKE (find resource indication) SCP requests resources required by business logic from IP (SRF);

seizeres: SeizeResource RETURN RESULT seek resource indication response;

SRFDIR: SRFDirective INVOKE (SRF indication) business logic indicates IP (or other network entities) to provide interaction with users;

srfdir: SRFDirective RETURN RESULT SRF instruction response;

RESETTIMER: ResetTimer INVOKE (reset timer) SCP starts and starts a timer to avoid timeout;

INSTREQ: InstructionRequest INVOKE (instruction application) for the captured special resources, the IP (SRF) requests an indication from the SCP, and when the IP (SRF) determines that one of the resources is allocated in the resource search message, it has been captured by establishing a connection to the MSC , call this message;

instreq: InstructionRequest RETURN RESULT instruction request response;

DISCONNRES: DisconnectResource INVOKE (disconnect resource indication) SCP instructs MSC to release the connection to IP. This message usually follows the online message resource;

CONNRES: ConnectResourceINVOKE (connection resource indication) When the SCF determines that the execution of the business logic requires a special resource, it sends this message to the MSC, requesting to establish a connection between the MSC and the IP;

ANLYZD: AnalyzedInformation INVOKE (analysis information indication) MSC uses this message to notify the service logic network unit SCP that the trigger criterion of the analysis information DP has been met;

Anlyzd: AnalyzedInformation RETURN RESULT analysis information indication response;

The following are directive parameter terms:

DGTSDIAL: The service code string received by DigitsDial from MS, indicating the number dialed by the user;

TRIGTYPE: TriggerType parameter The trigger type parameter, the detected trigger, indicates the trigger type;

WINCAP: WINCapability parameter is used to indicate the supported WIN capabilities;

SRFCapability: Special Resource Function Capability SRF capability, which specifies the required dedicated resource capability;

TLDN: Temporary Locator Directory Number is the temporary local location path number allocated for dedicated resources;

CARDGTS: CarrierDigits operator digital code;

ROUTDGTS: RoutingDigits routing digital encoding;

MIN: Mobile Station Information MS mark, including information such as the VLR module number where the calling MS is located;

TERMLIST: TerminationList terminal information list;

ANNLIST: AnnouncementList notification information list;

TRIGADDRLIST: TriggerAddressList parameter trigger address list parameter.

In the field of data communication, ICS (Incoming Call Screening) includes various types, such as ICS-receiving calls according to passwords, ICS-screening according to time, ICS-forwarding to voice mailbox, ICS-forwarding to another number, etc. At present, according to the technical requirements of the first stage of WIN (Wireless Intelligent Network wireless intelligent network), ICS-according to the password receiving call process is as shown in the accompanying drawing 1, comprises the following steps:

The first stage: the originating user initiates a call, and the MSC guides the call to the SCP according to the subscription information of the called number, including steps 1 to 4 in Figure 1:

Step 1: The originating user initiates a call to the MSC;

Step 2: The MSC uses the LOCREQ command to query the HLR for the subscription information and address information of the called number (the command will carry three mandatory parameters, namely DGTSDIAL, TRIGTYPE and WINCAP);

Step 3: HLR returns called number subscription information to MSC by locreq command (carries TRIGADDRLIST in the command);

Step 4: The MSC establishes a connection to the SCP according to the subscription information, initiates an ANLYZD command to the SCP, and instructs the analysis information (the command carries three mandatory parameters, namely DGTSDIAL, TRIGTYPE and WINCAP);

The second stage: SCP assigns a fixed TLDN code to IP, and instructs the originating MSC to connect to IP, IP collects user password information and transmits the password to SCP, and SCP screens incoming calls according to user input password, including step 15 in Figure 1 to step 17:

Step 5: SCP sends SEIZERES (search for resources) instruction message (carrying SRF Capability in the message) to IP when determining to need IP to gather password;

Step 6: IP will allocate TLDN codes for resources, and return TLDN codes to SCP in the seizeres message;

Step 7: The SCP returns the TLDN code to the HLR in the CONNRES, and the HLR forwards the CONNRES command to the originating MSC;

Step 8: After receiving the instruction, the originating MSC will establish a call to IP according to the TLDN code of IP;

Step 9: the IP sends an INSTREQ command to the SCP (that is, a request processing instruction command);

Step 10: The SCP responds with the SRFDIR command;

Step 11: The IP prompts the caller to enter the user password,

Step 12: IP collects user password

Step 13: During the process of the IP collecting the password from the calling user, the SCP sends a RESETTIMER command to the originating MSC, instructing to start the SSFT timer, and continue to wait for the collection of the password.

Step 14: the SCP sends the srfdir command to the IP (wherein the DGTSDIAL parameter transmits the password collected by the IP),

Step 15: The SCP determines that the collection of the password is completed, and sends an anlyzd command to the originating MSC, indicating that the call to the IP should be released, and the call processing to the user should continue.

Step 16: The originating MSC clears the call to IP,

Step 17: The SCP sends an instreq command to the IP to complete the transaction and indicate that the dedicated resource should be released.

The third stage: the originating MSC guides the call to the called user according to the subscriber number returned by the SCP, and establishes a normal call, including steps 18 to 24 in Figure 1:

Step 18: The originating MSC detects the Location trigger and sends a LOCREQ (that is, a locationrequest called location request instruction) to the HLR, and the TRIGTYPE parameter indicates the type of the LOCATION trigger encountered.

Step 19: HLR sends ROUTREQ (route request routing location request instruction) to VLR.

Step 20: VLR forwards ROUTREQ (route request routing location request command) to serving MSC.

Step 21: The serving MSC allocates the TLDN and returns it to the VLR in the routreq command.

Step 22: The VLR forwards the routreq command to the HLR.

Step 23: The HLR sends a locreq command (ie, the location please get the ball response command) to the originating MSC, indicating to establish a call to the user.

Step 24: The originating MSC establishes a call to the user. Normal call setup is complete.

In the above steps of the prior art, in the second stage, because the independent IP and the SCP need multiple interactions, the entire business process is complicated, the processing time is long, and the processing speed is slow. If the time interval between talking on the phone and hearing the system playback is too long, it is easy to give users the wrong feeling of system failure, introduce unnecessary cost investment, and the service functions provided by IP equipment are few, so it is impossible to do complex operations and implement complex operations. For business logic, it is difficult to introduce fixed network services to the C network platform.

Contents of the invention

The purpose of the present invention is to provide a method for simplifying the process of receiving calls based on passwords in ICS in the C network. In the case of reducing the number of interactions between IP and SCP, users can easily obtain high-quality voice services and improve system operation. Efficiency, reducing the processing time of the system to handle such calls.

The technical solution of the present invention is to improve the steps of the second stage on the basis of the prior art, and the steps of the improved second stage are:

Method of the present invention is realized according to the following steps:

a. Determined by the SCP that the user needs to initiate a call in the ICS based on the password, assign a fixed TLDN number to the IP;

b. Return the TLDN number to the MSC, and use the CONNRES instruction to connect to the resource;

c. MSC directly establishes a call to IP according to the returned TLDN number;

d. IP playback prompts the user to enter a password to operate;

e. Collect user key information;

f. The SCP waits for the IP to send back the user key information;

g. The results of the SCP detection of the IP call path show that the IP call path is normal, but the message from the IP has not been received yet, the SCP sends a RESETTIMER request to the MSC, resets the timer, goes to step f, and the call continues; the IP collects the user password , the IP sends the password to the SCP through the parameter DGTSDIAL; the SCP has received the user key information sent back by the IP, and the SCP sends anlyzd to the originating MSC, indicating that the call to the IP should be released, and the call to the user should continue; the IP sends a complete message After that, the connection is disconnected by itself; the originating MSC clears the call to the IP device.

In the above step g, the IP sends the password to the SCP through the service code string parameter DGTSDIAL received from the MS, which is transmitted through an internal message between threads or a TCP/IP message.

Can also include in above-mentioned step g:

g2. If the SCP detection result shows that the IP session has been released, then directly release the call initiated by the originating user.

Can also include in above-mentioned step g:

g3. The user button information sent back by IP has not been received by the timeout time, and the IP call path is checked whether it is normal;

g4. If detecting that the IP speech path is normal, then send a RESETTIMER request to MSC again, reset the timer, call continues, and directly return to step f; if detecting that the IP speech path is abnormal, then directly release the call initiated by the originating user.

Utilize the method of the present invention, by simplifying the interactive times between SCP and IP, simplify TLDN distribution, simplify the processing flow of C network SCP, make C network SCP process ICS (incoming call screening service)-according to password when receiving call flow , the processing efficiency can be greatly improved. And this method can be applied in the integration of CDMA network and fixed network business, regard the fixed network business as an IP, can integrate the existing fixed network intelligent network business.

Description of drawings

Fig. 1 is a schematic flow diagram of receiving call signaling according to a password in an ICS used by an existing CDMA network;

Fig. 2 is a schematic flow diagram of receiving call signaling according to a password in the ICS used by the CDMA network of the present invention.

Detailed ways

The implementation method and system call signaling flow of the present invention will be described in detail below in conjunction with FIG. 2 .

The present invention firstly needs to assign a fixed TLDN code to the IP. In fact, the TLDN code of each IP on the network must be fixed, and the TLDN code must be issued to all offices in the country by the operator. In this way, an interaction process between the SCP and the IP due to the need for the IP to allocate the TLDN code is reduced.

As shown in Fig. 2, steps 1 to 4 and steps 18 to 24 are the same as the steps in the prior art, and the difference is the steps of the second stage:

Step a: The SCP analyzes the information and determines that the user needs to initiate an ICS-receive call according to the password, and the SCP assigns a fixed TLDN number to the IP;

Step b: return the TLDN number to the MSC, and use the CONNRES instruction to connect to the resource;

Step c: MSC directly establishes a call to IP according to the returned TLDN number;

Step d: At this time, the IP playback prompts the user to enter a password for operation;

Step e: collecting user keystroke information;

Step f: the SCP waits for the IP to send back the user's keystroke information;

Step g: The SCP detects the IP call path. If the SCP detection result shows that the IP call path is normal, but the message from the IP has not been received yet, the SCP sends a RESETTIMER request to the MSC, resets the timer, and turns to step f, and the call continues; If the SCP detection result shows that the IP session has been released, the session will be released directly;

Step h: after the IP has collected the user password, set up a TCP/IP connection or an inter-process message to the SCP, and send the password to the SCP through the parameter DGTSDIAL; sending is passed by an internal message or a TCP/IP message between threads;

Step i: the SCP has received the user's button information sent back by the IP, and the SCP sends anlyzd to the originating MSC, indicating that the call to the IP should be released, and the call to the user should continue;

Step j: After the IP finishes sending the message, disconnect the connection by itself;

Step k: The originating MSC clears the call to the IP device.

Claims (4)

1. according to the method for password receipt of call, comprising during one kind the realization incoming call is screened in the CDMA net:

Step 1, originating user make a call, and moving exchanging center MSC directs the call to the service control point (SCP) according to the called number CAMEL-Subscription-Information;

The called number that step 2, originating MS C return according to SCP, guiding are called out the called subscriber place, are established to called normal call;

It is characterized in that, between above-mentioned steps one and step 2, further comprising the steps of:

A. judge that by SCP the user need initiate incoming call and screen professional ICS-according to the password receipt of call, SCP distributes an interim local location paths number TLDN for the private resource distribution for ip intelligent peripherals IP;

B.SCP returns to MSC with the TLDN number, uses connection resource CONNRES indication to be connected to resource;

C.MSC directly is established to the calling of IP according to the TLDN number that returns;

The d.IP playback prompting user operation of entering password;

E.IP collects user key-press information;

F.SCP waits for that IP sends it back user key-press information;

G.SCP detects IP speech channel result and shows that the IP speech channel is normal, but also fail to receive the message that IP sends, SCP sends replacement timer RESETTIMER request to MSC, the replacement timer, change step f, call out and continue, IP collects user password and finishes, and IP sends to SCP with password by the service code string parameter DGTSDIAL that receives from MS; SCP has received the user key-press information that IP sends it back, and SCP sends the analytical information indication to originating MS C and replys anlyzd, and indication should be discharged into the calling of IP, should continue to user's calling; After IP sends the message that finishes, remove connection voluntarily; Originating MS C is scavenged into the calling of IP device.

2. the described method that in CDMA net, realizes in the incoming call screening according to the password receipt of call of claim 1, it is characterized in that the IP of described step g sends to SCP with password by the service code string parameter DGTSDIAL that receives from MS and transmits by cross-thread inside story or TCP/IP message.

3. claim 1 or 2 described realize in CDMA net in the incoming call screening is characterized in that according to the method for password receipt of call, also comprise in the described step g:

The g2.SCP testing result shows that the IP speech channel discharges, then directly discharges the calling that described originating user is initiated.

4. claim 1 or 2 described realize in CDMA net in the incoming call screening is characterized in that according to the method for password receipt of call described step g also comprises:

G3. whether still fail to receive the user key-press information that IP beams back to time-out time, it is normal to detect the IP speech channel;

G4. normal if detect the IP speech channel, then send the RESETTIMER request to MSC again, the replacement timer is called out and is continued, and directly returns step f; If it is unusual to detect the IP speech channel, then directly discharge the calling that described originating user is initiated.

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