KR100357121B1 - Method for Concurrent Service in Mobile Communication System - Google Patents

Abstract

The present invention relates to a mobile communication system, and more particularly to providing a plurality of services (voice, line data, packet data, fax, etc.) to one subscriber at the same time in a third generation mobile communication system that must provide a variety of services of multimedia. The present invention relates to a simultaneous service method on an interface between a control station and an exchange station and a control station-switch in a mobile communication system. The simultaneous service method according to the present invention is a mobile communication system in which each subscriber communicates with another subscriber station or another service provider via a control station and an exchange station, and assigns one or more calls to each subscriber. And continuously providing each subscriber with a different communication service using each delimiter for the calls and a delimiter for each subscriber. In addition, the step of allocating a connection identifier for each service at the control station to simultaneously accommodate a plurality of services (Concurrent Services) on a signal control logical connection, using the information on each service and this service connection identifier Another feature is achieved, including the step of independently controlling each service connection between the control station and the switching station.

Description

Concurrent service method in mobile communication system {Method for Concurrent Service in Mobile Communication System}

The present invention relates to a mobile communication system, and more particularly to providing a plurality of services (voice, line data, packet data, fax, etc.) to one subscriber at the same time in a third generation mobile communication system that must provide a variety of services of multimedia. The present invention relates to a simultaneous service method on an interface between a control station and an exchange station and a control station-switch in a mobile communication system.

The third generation mobile communication system complies with the cdma2000 standard of North America.

As is known, in the mobile communication network (DCN, PCS) corresponding to the second-generation mobile communication in the prior art, only a single service can be provided to one mobile station, and a call processing model for providing a service can also only process a single service. Therefore, in order to use another service while using a specific service, it is possible to change the service by using service negotiation on the air interface, but it is inevitable to stop the service that was in use.

On the other hand, the concurrent service is an essential function in the 3G mobile communication network under the multimedia environment, and it is possible to additionally use a new service without interrupting the service being used by the subscriber, that is, multiple services (eg voice and packet data). Service), and it is impossible to provide service with the call processing model and procedure provided by 2nd generation mobile communication system (DSN, PCS).

Currently, the method of providing simultaneous services in the cdma2000 system is presented only in the TIA / EIA / IS-2000A, which is an air interface standard, and the method of controlling the concurrent service at the control station and the switching station and on the interface between the control station and the switching station. The concurrent service-related procedures and message structures of are not defined.

Since the procedure between the mobile station and the base station / control station is assumed to comply with the TIA / EIA / IS-2000A standard, a detailed process thereof will be omitted.

1 is a diagram showing a method for establishing a NO.7 SCCP connection between a control station and a switching station according to the prior art.

Referring to FIG. 1, in order to provide a specific single service in the existing 2nd generation mobile communication system, a call setup procedure for each service such as voice and data should be followed, and in particular, a call setup for providing a corresponding service between a control station and an exchange station. For this purpose, one No.7 SCCP connection is established and the corresponding mobile station is classified by the assigned source / destination reference number to control the call and service.

Specifically, as shown in FIG. 1, the control station that receives an origination / page response message on the air interface notifying the start of the originating / incoming call setup from the mobile station controls and distinguishes the terminal from the interface with the switching station. Allocate a No.7 SLR (Source Reference Number) to the terminal and include a Connection Management Service Request / Page Response message according to the Inter-Operability Specification (IOS) standard for initiating call processing of the terminal. Complete Layer 3 Information message is generated. Thereafter, the control station sends a No.7 SCCP Connection Request message including a SCCP connection identifier and an IOS Complete Layer 3 message to the switching station in order to initiate call establishment for the corresponding terminal with the switching center. Attempt to establish a SCCP connection by transmitting (S10).

When the control station receives the SCCP Connection Confirm message that accepts the SCCP connection setting from the switching station, the SCCP connection for the call processing of the terminal is completed on the interface between the control station and the switching station. At this time, the SCCP Connection Confirm message includes a source / destination reference number and uses the SCCP connection and the source / destination reference number set until the service for the terminal is stopped. The call is controlled (S11).

Fig. 2 is a diagram showing a method of using a NO.7 SCCP connection separator between a control station and a switching station according to the prior art.

In the SCCP connection state set in FIG. 1, control messages for a corresponding UE include an SCCP connection identifier. In detail, FIG. 2 shows that a control message transmitted from an exchange station to a control station is SLR (exchange station) / DLR (control station). Control message transmitted from the control station to the switching center includes an SCCP connection identifier composed of an SLR (controlling station) / DLR (switching station).

However, in order to provide simultaneous services using the call processing procedure of the second generation mobile communication system, the following problems are involved.

That is, as shown in FIG. 3, a method for controlling simultaneous services in a call control model for a single service of a mobile communication system according to the prior art will be described. Assuming that it can be received, the mobile station has one call for each concurrent service. These calls are then sent to the base station / control station with identifiers on each air interface, such as sr_id or CON.REF. The base station / control station can control each of these service options, but call control between the control station and the switching station uses one SCCP connection identifier (Source / Destination Reference Number: SLR / DLR) regardless of the service. In other words, if one service is in use, the service supporting the other service must be stopped and transferred to the newly requested service, or the call establishment request for another newly requested service is denied.

That is, the IOS connection management request / page response and additional service related messages, which are call control messages between the control station and the switching station of the conventional second generation mobile communication system, are used to distinguish multiple services in one mobile station. When no caller is included, the call is controlled using the SCCP connection identifier (Source / Destination Reference Number: SLR / DLR) assigned to the mobile station when the call is set up for the first service.

As a result, since the second generation mobile communication system uses a one-dimensional single service control method of controlling a call on a mobile station basis, that is, conceptually identifying a call and a service with a mobile station, it is impossible to simultaneously provide multiple services to one mobile station. In order to receive a service other than the service in use, the service may be changed by service negotiation, but there is a problem in that the stopping of the service in use is inevitable.

Accordingly, an object of the present invention has been devised in view of the above-mentioned problems of the prior art, and the upper layer IOS exchanged in addition to the SCCP connection delimiter of the lower layer in the state of attempting or connecting SCCP connection between the control station and the switching station By adding a service option ID (SOCI) in a message and to provide a simultaneous service method in a mobile communication system to provide other services additionally required from the mobile station at the same time without interruption of the existing service even after the SCCP connection.

According to an aspect of the present invention for achieving the above object, in the mobile communication system in which each subscriber communicates with another subscriber station or another service provider via the control station and the switching station, Allocating one or more calls to each other, and continuously providing each subscriber with a different communication service using each separator for the calls and a separator for each subscriber.

The control station assigns a delimiter for the requested communication service and an SCCP connection delimiter to a specific mobile station when the other communication service request is first requested by the control station.

In addition, the step of allocating the call is made by transmitting a call setup message from the mobile station or the exchange to the control station, the call setup message is a message indicating the start of the call setting of the mobile station or the exchange station, if the call It is characterized in that the connection management request message (CM Service Message), in the case of the incoming call is a paging response message (Paging Response Message).

According to yet another aspect for achieving the above object, the step of allocating a connection identifier for each service at the control station to simultaneously accommodate a plurality of services (Concurrent Services) on a logical connection for signal control, This feature is achieved by using the information about the service and the service connection identifier to independently control each service connection between the control station and the switching station.

The one signal control logical connection is a logical connection established by the SCCP connection established between the control station and the switching station, and when the SCCP connection is established, an additional call control message and additional service from a specific mobile station are requested from the switching station. Or including the service connection identifier in a call control and additional service message transmitted from the switching center to the control station.

The supplementary service message sent from the control station to the switching station includes a "Connect" message indicating that the mobile station is in a call state, and a "progress" instructing the mobile station to generate or remove a local tone. Message, a "Flash with Information" message indicating additional service information of the mobile station, and a "Rejection" message indicating that the mobile station has rejected the "Command" message. It features.

The service access identifier is characterized by consisting of an A1 element ID, a length, a service option access ID, and fields for reserved bits.

1 is a diagram illustrating a method for establishing a NO.7 SCCP connection between a control station and a switching station according to the prior art;

Fig. 2 is a diagram showing a method of using a NO.7 SCCP connection separator between a control station and a switching station according to the prior art.

3 is a diagram illustrating a virtual call control method for a single service of a mobile communication system according to the prior art;

4 is a diagram illustrating a call control method for simultaneous service of a mobile communication system according to the present invention.

5 is a flowchart illustrating a call setup for simultaneous service of a mobile communication system according to the present invention;

6 is a flowchart illustrating a call disconnection for a simultaneous service of a mobile communication system according to the present invention.

7 is a diagram showing the configuration of a service option connection ID according to the present invention;

* Description of the symbols for the main parts of the drawings *

201: mobile station

202: base station / control station

203 Exchange Bureau

The present invention proposes a multimedia call processing model for two-dimensional processing of a mobile station and a call or a mobile station and a service that are compatible with a 3G mobile communication system environment in order to provide a concurrent service. Introducing the Service Option Connection Identifier (SOCI) of the upper layer on the source / destination reference number (SLR / DLR) for control by mobile station between the control station and the exchange. We propose a method for providing simultaneous service to a mobile station by adding it on an IOS call control message.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

4 is a diagram illustrating a call control for a simultaneous service of a mobile communication system according to the present invention.

Referring to FIG. 4, assuming that one mobile station 201 can receive six services at the same time, each mobile station 201 is a service that is separately controlled on the air interface for each service that is simultaneously being serviced. It is interfaced on the control station with information about the corresponding service (such as CON_REF or sr_id) in the service option connection record (SOCR). The control station 202 allocates one call with respect to the information on the corresponding service of the mobile station 201 (such as CON_REF or sr_id), and accordingly, the service option connection ID (SOCI) and the SCCP connection identifier (SLR). / DLR). Therefore, the request for a new service required from each mobile station 201 includes one SCCP connection identifier (SLR / DLR) for each mobile station and six service option connection IDs (for each of a plurality of services supported by up to six mobile stations). SOCI) and is interfaced to the switching center 203.

Therefore, after the SOCI assignment is completed, the control station 202 first issues a connection management service request / page response that notifies the start of the originating / incoming call setup including this SOCI between the control station and the switching station as in the existing call setup procedure. Management Service Request / Paging Response) to establish a Service Option Connection between the control station and the exchange, if the service is the first service for the mobile station, as in the existing call processing procedure. No.7 SCCP connection setup procedure is required.

Therefore, the control station 202 assigns SOCI and SCCP connection identifier (SLR / DLR) to the mobile station 201 when the first simultaneous service is required from the mobile station 201, and then the control station connects with the switching station. In order to initiate the call setup for the corresponding UE, a No.7 SCCP Connection Request message including an SCCP connection identifier and an IOS Complete Layer 3 message including SOCI is transmitted to the switching center. Attempt to establish an SCCP connection. The switching center transmits an SCCP Connection Confirm message to the control station with respect to the SCCP Connection Request message No. 7 above, so that the SCCP connection is established between the control station and the switching station.

However, if the service is not the first service and additional service other than the one in use, and No.7 SCCP connection is already established for the mobile station, only the service option connection setting is necessary.

Thus, the control station 202 allocates SOCI for additional service requests of the mobile station 201 and exchanges messages with the switching station necessary for additional simultaneous service establishment.

Table 1 below shows the parameters included in the Service Management Connection Service Request message transmitted from the control station to the switching station to inform the start of setting when the call is initiated. It includes.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange CM Service Type Exchange Classmark Information Type 2 Exchange Mobile Identity (IMSI) Exchange Called Party BCD Number Exchange Mobile Identity (ESN) Exchange Slot Cycle Index Exchange Authentication Response Parameter (AUTHR) Exchange Authentication Confirmation Parameter (RANDC) Exchange Authentication Parameter COUNT Exchange Authentication Challenge Parameter (RAND) Exchange Service option Exchange Voice Privacy Requeset Exchange Radio environment and resources Exchange Called Party ASCⅡ Number Exchange Circuit Identity Code Exchange Authentication Event Exchange Authentication Data Exchange PACA Reorigination Indicator Exchange User Zone ID Exchange IS-2000 Mobile Capabilities Exchange CDMA Serving One Way Delay Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

Table 2 below shows parameters included in a page response message transmitted from the control station to the switching station to inform the start of setting when the incoming call is received, and includes SOCI parameters in addition to these parameters according to the present invention.

Information element Element orientation Protocol Discriminator Exchange Reserved-octet Exchange Message Type Exchange Classma is Information Type 2 Exchange Mobile Identity (IMSI) Exchange Tag Exchange Mobile Identity (ESN) Exchange Slot Cycle Index Exchange Authentication Response Parameter (AUTHR) Exchange Authentication Confirmation Parameter (RANDC) Exchange Authentication Parameter COUNT Exchange Authentication Challenge Parameter (RAND) Exchange Service option Exchange Voice Privacy Request Exchange Circuit Identity Code Exchange Authentication Event Exchange Radio environment and resources Exchange User Zone ID Exchange IS-2000 Mobile Capabilities Exchange CDMA Serving One Way Delay Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

On the other hand, the control station changes the call setup / disconnection process according to whether or not a service requested from a specific mobile station is a service that is first started. This process will be described with reference to FIGS. 5 and 6.

5 is a flowchart illustrating a call setup for simultaneous service of a mobile communication system according to the present invention.

Referring to FIG. 5, if there is a setting request for a new service from the mobile station (S30), the control station determines whether the service request is the first service for a specific mobile station (S31).

If the service requested from the mobile station is the first service, the SCCP logical connection identifier (SLR / DLR), which is a mobile station identifier for a new service, and a service option access ID (SOCI), which is a service-specific identifier of the mobile station, are allocated. (S32) The SCCP logical connection is established with the switching center. (S33)

Then, the control station and the exchange exchange the message corresponding to the call processing procedure through the established SCCP logical connection (S35). At this time, the call processing message includes a service option access ID (SOCI), which is a service-specific identifier of the mobile station, and is exchanged through an SCCP logical connection divided by an SCCP logical connection identifier (SLR / DLR) assigned for each mobile station.

However, if the service request is not the first service for a specific mobile station, the SOCI which is distinguished from the existing service is allocated by using the existing SCCP logical connection (S34), and similarly, the message corresponding to the call processing procedure is transmitted to the control station. Exchange between exchange stations (S35)

6 is a flowchart illustrating a call disconnection for a simultaneous service of a mobile communication system according to the present invention.

Referring to FIG. 6, if there is a new service release request from the mobile station (S40), it is determined whether the service release request is the last service for a specific mobile station (S41), and in the case of the last service, a call release procedure is performed (S42). ), Releases the established SCCP logical connection (S43).

However, if it is not the last service for the mobile station, the SOCI for the service required to release the service is recovered and assigned to the service required from another mobile station (S44).

7 is a diagram illustrating a configuration of a service option access ID (SOCI) according to the present invention.

Referring to FIG. 7, the format of a service option access ID (SOCI) defined by the present invention includes an A1 element identifier (ID) to which the service option access ID is transmitted, a length (Length) of the A1 element ID, and the like. It consists of a Reserved and a Service Option Connection Identifier field, and has a total size of 3 octets (3 × 8 bytes).

The A1 element ID field and the length field each have a size of one octet, the reserved field has the upper five bits among the remaining one octet, and the service option connection ID (SOCI) field has the size of the lower three bits. Has

In addition to the call setup message, the present invention additionally transmits the SOCI to additional call setup and additional service messages required from a specific mobile station in a state where SCCP connection is established between the control station and the switching center. This is because there is no service identifier for distinguishing a service in the call establishment and additional service messages.

Table 3 below shows parameters included in the "Connect" message transmitted from the control station to the switching station to inform the mobile station that the call is in a call state, and additionally includes SOCI.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

Table 4 below shows the parameters included in the "Progress" message transmitted by the switching center to instruct the mobile station to generate or remove the local tone. In addition to these parameters, it transmits including SOCI.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange Signal Exchange MS Information Records Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

Table 5 below shows the parameters included in the " Alert with Information " message sent from the control station to the switching station to ring the mobile station, and includes SOCI in addition to these parameters.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange MS Information Records Exchange Service Option Connection Indentifier (SOCI) (added) Exchange

Table 6 below shows the parameters included in the "Flash with Information" message sent from the control station to the switching station to transmit the supplementary service information for the mobile station, and includes SOCI in addition to these parameters.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange Called Party BCD Number Exchange Signal Exchange Message Waiting Indication Exchange Calling Party ASCⅡ Number Exchange Tag Exchange MS Information Records Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

Table 7 below shows the parameters included in the exchange message (Flash with Information Ack) for the "Flash with Information", and includes the SOCI in addition to these parameters.

Information element Element orientation Protocol Discriminator Control station Reserved-Octet Control station Message Type Control station Tag Control station Service Option Connection Identifier (SOCI) (Added) Control station

Table 8 below shows the parameters included in the "Rejection" message sent from the control station to inform the exchange that the mobile station has rejected the "Command" message, and includes the SOCI parameter in addition to this parameter.

Information element Element orientation Protocol Discriminator Exchange Reserved-Octet Exchange Message Type Exchange Mobile Identity (IMSI) Exchange Mobile Identity (ESN) Exchange IS-2000 Cause Value Exchange Service Option Connection Identifier (SOCI) (Added) Exchange

As described above, the present invention provides a simultaneous service that is an essential function of the third generation mobile communication network in a multimedia environment while minimizing the change of existing call processing procedure on the interface between the control station and the switching station. It is possible to use additional services, that is, to provide a plurality of services (eg voice and packet data services) at the same time, and to flexibly cope with changes in future network evolution.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (10)

A mobile communication system in which each subscriber communicates with another subscriber station or another service provider via a control station and an exchange station, Allocating one or more calls for each subscriber; And continuously providing different communication services to each subscriber by using each separator for the calls and the separator for each subscriber. The mobile communication system according to claim 1, wherein the control station allocates a delimiter for the requested communication service and a SCCP connection delimiter to a specific mobile station when the other communication service request is first requested from the control station. Concurrent service method 2. The method of claim 1, wherein allocating the calls comprises transmitting a call setup message from the mobile station or the switching station to a control station. 4. The simultaneous service method of claim 3, wherein the call setup message is a message for notifying of the origination of the origination of the mobile station or the establishment of the incoming call of the switching station. The simultaneous service method of claim 4, wherein the call is a CM Service Message, and the call is a paging response message. Allocating a connection identifier for each service at a control station to simultaneously accommodate a plurality of services (Concurrent Services) on one logical connection for signal control; And independently controlling each service connection between the control station and the switching station by using the information on each service and the service access identifier. 7. The method of claim 6, wherein the one signal control logical connection is a logical connection established by an SCCP connection established between the control station and the switching station. 8. The service of claim 7, wherein the additional call control message in the state where the SCCP connection is established and the call control and additional service message transmitted from the control station or the switching station to the control station when the additional service is requested from a specific mobile station. A service control method in a mobile communication system, characterized in that the transmission including the access identifier. 9. The method of claim 8, wherein the supplementary service message sent from the control station to the switching station is a "Connect" message indicating that the mobile station is in a call state and instructing the mobile station to generate or remove a local tone. "Progress" message, "Flash with Information" message indicating the mobile's supplementary service information, and "Rejection" indicating that the mobile station has rejected the "Command" message. Service control method in a mobile communication system, characterized in that any one of the message. The method of claim 6, wherein the service access identifier comprises an A1 element ID, a length, a service option access ID, and fields for reserved bits.