KR20020071111A - Method for multimedia broadcasting service using traffic channel in wireless communication system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a multimedia broadcasting service method using a traffic channel in a wireless communication system and a computer readable recording medium storing a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention allows a plurality of subscribers to simultaneously use a high-speed broadcast-only channel of a traffic channel in a wireless communication system, and through this to provide a multimedia service method and a method for realizing a high-speed multimedia service to a plurality of subscribers To provide a computer-readable recording medium that records the program.

3. Summary of Solution to Invention

According to an aspect of the present invention, there is provided a method for multimedia broadcasting service in a wireless communication system, in which, in response to a request for a multimedia broadcasting service from a terminal, a base station interoperates terminals wishing for a multimedia broadcasting service to an internet protocol (IP) network using a service option. Stage 1; A second step of the multimedia broadcasting service server interworking with the internet protocol (IP) network sharing the terminal with the traffic channel for multimedia broadcasting service and registering the multimedia broadcasting service in the multimedia broadcasting service; Transmitting, by the multimedia broadcasting service server, corresponding multimedia broadcasting information provided by an information provider to the base station through the multimedia broadcasting service traffic channel; Transmitting, by the base station, an acknowledgment message of the corresponding multimedia broadcasting information to the multimedia broadcasting service server; And a fifth step of the base station broadcasting the corresponding multimedia broadcasting information in one direction through a wireless section to the corresponding terminal registered in the multimedia broadcasting service using the traffic channel for the multimedia broadcasting service.

4. Important uses of the invention

Industrial Applicability The present invention is used for multimedia broadcasting services in wireless communication systems.

Description

Method for multimedia broadcasting service using traffic channel in wireless communication system

The present invention relates to a multimedia broadcasting service (MBS) method using a traffic channel in a wireless communication system, and to a computer readable recording medium recording a program for realizing the method. Code Division Multiple Access (CDMA) is a dedicated traffic channel capable of high-speed transmission for multimedia services in a mobile communication system.

CDMA mobile communication network is limited in wireless section capacity so that many people cannot receive multimedia service using high speed transmission. Therefore, subscribers who want high-speed multimedia services must access the system individually and receive services in a point-to-point form. However, CDMA mobile networks cannot accommodate many subscribers because they have a limited capacity to handle like wired networks.

Nevertheless, the current subscribers want a lot of multimedia services, it is difficult to provide such multimedia services due to the radio section capacity in the existing CDMA mobile communication network.

At present, as the CDMA mobile phone system evolves, its transmission speed is also greatly increased, but various problems occur due to limited radio section capacity. However, there may be a number of advantages to broadcasting services using one common channel available to all subscribers.

However, in the conventional CDMA-2000 protocol, since there is no 64kbps high speed broadcast channel, there are many problems in providing a multimedia service requiring high speed transmission. Among them, there is a Broadcast Control Channel (BCCH) defined in IS-2000 (synchronous IMT-2000 radio section protocol standard). However, this is a channel for transmitting system information, which can transmit up to 19.2kbps, which causes problems in multimedia services. In addition, although each subscriber can perform high-speed transmission with one traffic, it can only be used by one subscriber, and thus it is not possible to accommodate several subscribers with one limited base station capacity.

Therefore, a dedicated broadcast channel capable of high speed transmission is indispensable to receive multimedia services through a generalized mobile telephone network.

In order to solve the above problems, the present invention allows a plurality of subscribers to simultaneously use a high-speed broadcast dedicated channel of a traffic channel in a wireless communication system, thereby providing a high-speed multimedia service to a plurality of subscribers An object of the present invention is to provide a multimedia service method and a computer-readable recording medium recording a program for realizing the method.

1 is an exemplary configuration of a wireless communication system for a multimedia broadcasting service (MBS) to which the present invention is applied.

2 is a diagram illustrating an embodiment of a message body of an ECAM used in the present invention.

3 is a diagram illustrating an embodiment of a message field of an ECAM used in the present invention.

4 is a diagram illustrating an embodiment of registration type and MBS additions defined in IS-2000 used in the present invention.

5 is an exemplary diagram illustrating a protocol stack structure for MBS used in the present invention.

6 is a flowchart illustrating a signal processing procedure in a system for a multimedia broadcasting service according to the present invention.

7 is a flowchart illustrating a signal processing procedure in a terminal for a multimedia broadcasting service according to the present invention.

* Explanation of symbols for the main parts of the drawings

11 mobile station (MS) 12 base station (BTS) / control station (BSC)

13 exchange center (MSC) 14 interworking unit (IWF)

15: Short Message Service Center (SMC) 16: Short Service Server

17: Cell Broadcasting Center (CBC) 18: Information Provider (IP)

19: MSB Server 20: WAP Gateway

21: VOD Server 22: Gatekeeper (GK)

23: gateway (GW)

In accordance with an aspect of the present invention, there is provided a multimedia broadcasting service method in a wireless communication system. A first step of interworking with the network; A second step of the multimedia broadcasting service server interworking with the internet protocol (IP) network sharing the terminal with the traffic channel for multimedia broadcasting service and registering the multimedia broadcasting service in the multimedia broadcasting service; Transmitting, by the multimedia broadcasting service server, corresponding multimedia broadcasting information provided by an information provider to the base station through the multimedia broadcasting service traffic channel; Transmitting, by the base station, an acknowledgment message of the corresponding multimedia broadcasting information to the multimedia broadcasting service server; And a fifth step of the base station broadcasting the corresponding multimedia broadcasting information in one direction through a wireless section to the corresponding terminal registered in the multimedia broadcasting service using the traffic channel for the multimedia broadcasting service. .

In addition, the present invention is characterized in that the base station further comprises a sixth step of transmitting a terminal call message to the terminal when performing the multimedia broadcasting service.

In order to achieve the above object, the present invention relates to a wireless communication system having a processor for a multimedia broadcasting service, by using a service option for a terminal that a base station desires for a multimedia broadcasting service according to a request for a multimedia broadcasting service from a terminal. A first function of interworking with a protocol (IP) network; A second function of sharing, by the multimedia broadcasting service server linked to the Internet Protocol (IP) network, the corresponding terminal with the traffic channel for multimedia broadcasting service and registering the multimedia broadcasting service; A third function of transmitting the multimedia broadcasting information provided by the information provider from the multimedia broadcasting service server to the base station through the traffic channel for the multimedia broadcasting service; A fourth function of transmitting, by the base station, a reception acknowledgment message of the corresponding multimedia broadcasting information to the multimedia broadcasting service server; And the base station records a program for realizing a fifth function of unidirectionally broadcasting the corresponding multimedia broadcasting information through a wireless section to the corresponding terminal registered in the multimedia broadcasting service using the traffic channel for the multimedia broadcasting service. It provides a recording medium that can be read by.

The present invention also provides a computer-readable recording medium having recorded thereon a program for further realizing a sixth function of transmitting a terminal call message to a corresponding terminal by the base station when performing a multimedia broadcasting service.

The present invention intends to use a transport traffic channel for a multimedia service in a CDMA mobile communication network. A plurality of subscribers share a common high-speed transmission traffic channel to receive a multimedia service through a high-speed broadcast-only channel of a traffic channel. It would be.

In other words, the present invention allows a plurality of subscribers to use a traffic channel at the same time, and provides a high-speed multimedia service to a plurality of subscribers simultaneously by using a high-speed broadcast-only channel of the traffic channel.

The present invention is to change the call processing algorithm in the existing CDMA-2000 radio section protocol to receive a specific service desired by the subscriber through the traffic channel. That is, when the subscriber selects the high speed multimedia service through the terminal menu, the subscriber enters the traffic channel by the method proposed by the present invention and provides the multimedia service. In this case, a multimedia service is provided using a high-speed broadcast dedicated channel of a traffic channel.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a wireless communication system for a multimedia broadcasting service to which the present invention is applied and shows a system configuration for a multimedia broadcasting service (MBS) using a high-speed traffic channel of a CDMA mobile communication network.

In the figure, " 11 " is a mobile station (MS), " 12 " is a base station transceiver subsystem (BTS) / control station (BSC: Base Station Controller), " 13 " is a mobile switching center (MSC). ), "14" is Interworking Function (IWF), "15" is Short Message Service (SMS) Message Center (SMC: SMS Message Center), "16" is Short Message Service (SMS) Server ), "17" is a Cell Broadcasting Center (CBC), "18" is an Information Provider (IP), "19" is a Multimedia Broadcasting Service (MSB) Server, and "20" is a WAP (Wireless Application). Protocol (Gateway), "21" denotes a Video On Demand (VOD) server, "22" denotes a Gate Keeper (GK), and "23" denotes a Gateway.

The mobile station (MS) 11 is within the range of any base station (BTS) 12, and the information of the mobile station (MS) 11 is transmitted to the base station (BTS) 12 and the control station (BSC) 12 controlling it. Is transmitted to the switching center (MSC) 13 and information transmitted from the switching center (MSC) 13 is transmitted to the mobile station (MS) 11 via the base station / control station (BTS / BSC) 12. .

The mobile station (MS) 11 is a terminal that a user can carry and communicate with while moving. The MS 11 uses a forward channel when receiving a multimedia broadcasting service and uses a reverse channel when making a call. That is, the mobile terminal (MT) multimedia broadcasting service is used for reception, and the mobile originated (MO) multimedia broadcasting service is used for transmission.

In general, a mobile communication system uses a data burst message of a paging channel of a CDMA mobile communication system upon reception, and data of a forward traffic channel when a user is busy. Send the message as a burst message. In addition, a data burst message of an access channel is used to transmit a message, and a data burst message of a reverse traffic channel is transmitted when a call is in progress.

The messages transmitted and received at the mobile station (MS) 11 are connected to a switching center (MSC) 13 via a base station / control station (BTS / BSC) 12 for high frequency signal processing and call processing.

A base station (BTS) 12 connects a mobile station (MS) 11 to a control station (BSC) 12, and includes a digital channel unit (DCU) and a time / frequency control unit (TCU: Timing / Frequency). Control Unit), Radio Frequency Unit (RFU), and Global Positioning System (GPS).

The base station (BTS) 12 performs a wired / wireless conversion function of communicating with a mobile station (MS) 11 over the air and communicating with a control station (BSC) 12 by wire.

The control station (BSC) 12 connects the base station (BTS) 12 to the switching center (MSC) 13 to coordinate the connection between the base stations (BTS) 12, and the base station (BTS) 12 and the switching station ( MSC) serves as a signal processing function for communication between the 13.

The exchange station (MSC) 13 processes mobile communication subscriber calls, connects with a control station (BSC) 12 to perform call setup and release functions of the mobile station (MS) 11, and the like. Perform various related functions.

Now, a method for performing a multimedia broadcasting service will be described in more detail.

First, a user who wants a multimedia broadcasting service (MBS) selects a multimedia broadcasting service from a terminal menu through a terminal (mobile station (MS) 11) and is connected to a base station / control station (BTS / BSC) 12, which is a base station. The control station (BTS / BSC) 12 connects to an Internet Protocol (IP) network using a Service Option (SO) defined in CDMA-2000.

At this time, if connected to a switching center (MSC) 13 represented by a voice signal, it is connected to a public switched telephone network (PSTN) or to an interworking unit (IWF) 14 in the case of line data. do. In this case, the interworking unit (IWF) 14 interworks with a packet switched data network (PSDN) corresponding to a point-to-point service.

On the other hand, if the terminal (mobile station (MS) 11) wants a short message service (SMS), it can be connected to the SMS message center (MC) 15 to receive additional services using the SMS server 16. At this time, in the SMS message center (SMC), a broadcast service using a paging channel is possible. In this case, the cell broadcast center (CBC) 17 transmits the corresponding information to the terminal (mobile station (MS) 11). . In this case, the transmission speed and the message length are very small.

The terminal call connected to the IP network is interworked with the WAP gateway 20 for menu browsing or is directly connected to the multimedia broadcasting service (MBS) server 19.

If a subscriber station (mobile station (MS) 11) wants to point-to-point (Point-to-Point) service is directly linked to the video-on-demand (VOD) server 21 to receive the service.

A plurality of information providers (IPs) 18 are linked to the multimedia broadcasting service (MBS) server 19 to provide various services.

In addition to the system components, a gatekeeper (GK) 22 and a gateway 23 for video telephony can be linked to the IP network.

Now, a change in the existing CDMA-2000 radio segment protocol will be described so that a high-speed multimedia service can be simultaneously provided to a plurality of subscribers using a high-speed broadcast-only channel of a traffic channel.

First, the message structure for entering the MBS traffic channel is as follows.

The MBS capable terminal 11 enters a traffic channel by selecting a terminal menu. First, the system notifies the traffic channel entry using the Extended Channel Assignment Message (ECAM) as shown in FIG. 2 and teaches an entry method thereof.

To indicate that MBS is available in the system, the RESERVED_2 field following ASSIGN_MODE of the ECAM is set to Reserve and is now sent as "00000". The system fills all these fields with "11111" to indicate that MBS is possible.

Therefore, the terminal 11 can know whether MBS is possible by looking at the ECAM periodically transmitted from the system. At this time, each terminal address (Address) has a telephone number or an ESN (Electronic Serial Number), all of which are treated as 0.

After the terminal 11 receives the forward fundamental channel (F-FCH), the terminal 11 reenters the forward supplemental channel (F-SCH), which is a high-speed data channel. Here, the F-FCH serves as a kind of common control channel commonly used for subscribers who want MBS.

Entry of the F-SCH uses an Extended Supplemental Channel Assignment Message (ESCAM) transmitted by the F-FCH. The structure of this message is the same as that defined in IS-2000 (CDMA-2000 Radio Section Protocol).

The terminal 11 receives the multimedia information from the F-SCH and the control signal uses the F-FCH.

On the other hand, the radio section call processing procedure is as follows.

When the terminal 11 acquires the F-FCH and the F-SCH for the MBS, it is registered in the system immediately. In this case, the terminal 11 is used in the same manner as the registration message defined in the IS-2000. However, REG_TYPE is separately defined as shown in FIG. 4.

The terminal 11 transmits a registration message to the system. In this case, the REG_TYPE is set to 1111 and transmitted. Then, the system can confirm that the subscriber station 11 receives the MBS service using this.

When the terminal 11 completes the registration in this way, it can receive the necessary MBS service.

During the MSB service, the system may send a page message (PageMessage) for calling the terminal (11). In IS-2000, it is defined in a paging channel, but in the present invention, the F-FCH is used to transmit in the same form.

Accordingly, when the terminal 11 receives a general page message transmitted through a traffic channel during the MBS service, the terminal 11 displays a selection of the message on the subscriber terminal screen. For example, "call has arrived" for the subscriber to select.

If the subscriber wants to answer the call, the terminal 11 returns to the standby state of the previous state and responds to the access channel. Alternatively, the system can optionally send a general page message back in standby. The rest follows the call processing procedure defined in IS-2000.

Basically, the power control function is not performed by the system and the terminal 11 during the MBS service.

The terminal 11 runs a searcher by itself to search the distribution of neighboring base stations and the received electric field strength. If a stronger base station is found and the handoff point is reached, the terminal 11 immediately reports to the base station without reporting to the base station. Handoff is performed to receive continuous service.

When the system information is changed by the terminal 11 performing a handoff without assistance of the base station, the terminal 11 should perform a registration procedure by the method proposed by the present invention as the base station.

On the other hand, in the present invention, a separate protocol stack must be defined and serviced, and its structure is as shown in FIG. 5.

As shown in FIG. 5, the protocol stack for MBS includes a codec portion for processing multimedia, a real time protocol (RTP) for real-time processing, and a standard transport protocol. There are User Datagram Protocol (UDP) and Internet Protocol (IP).

Layer 2 and Layer 1 follow the standard method defined in IS-2000.

Menus and options required by the terminal 11 can be controlled by the system using WAP or SMS.

Referring to FIG. 6, a signal processing process in a system for a multimedia broadcasting service according to the present invention will now be described.

When multimedia information is processed in the system, it is processed in one direction in the wireless section, and the system must perform a response for each packet.

First, when the information provider (IP) 18 transmits the multimedia information to the multimedia broadcasting service (MBS) server 19 (601), the multimedia broadcasting service (MBS) server 19 is connected to the terminal 10 and PPP. The multimedia information is transmitted to a packet data service node (PDSN) of an IP network, which is an endpoint to perform (602).

Thereafter, the packet data service node (PDSN) sets UDP and IP to transmit corresponding multimedia information to the base station / control station (BTS / BSC) 12 (603).

For the sake of understanding, referring to the PPP connection establishment process between the mobile station (MS) 11 and the packet data service node (PDSN) in more detail, the packet data service node (PDSN) is connected to the mobile station (MS) 11. When sending a Link Control Protocol Request (LCP Configure Request) message, the mobile station (MS) 11 controls link control to the packet data service node (PDSN) if it is configured to use CHAP (Challenge Authentication Protocol). Send a LCP Configure Noacknowledgement message, and in response, the Packet Data Service Node (PDSN) sends a Link Control Protocol Request (LCP) Request message that is missing an authentication option. Will send a link control protocol configuration response (LCP Configure Acknowledgement) message. Next, if the MS 11 transmits an IPCP Configure Request message to the packet data service node PDSN without omitting the IP address option, the packet data service node PDSN is sent to the packet data service node PDSN. Sends an IPCP Configure Acknowledgement message to the mobile station (MS) 11. This completes all PPP configuration.

On the other hand, when the base station (BTS) 12 correctly receives the multimedia information, it responds to this, the response is a packet data service node (PDSN), MBS server 19, information provider (IP) 18 Are sent (605-607).

The base station (BTS) 12 transmits the multimedia information to the terminal (mobile station (MS) 11) in one direction through the F-FCH and the F-SCH (604).

Meanwhile, referring to FIG. 7, a signal processing process in a terminal for a multimedia broadcasting service according to the present invention will be described.

First, when the subscriber selects the multimedia broadcasting service (MBS) from the terminal menu (701), the subscriber enters a traffic channel by the method proposed by the present invention. In this case, if the reserved field of the ECAM is set to " 11111 " (702), it enters the MBS (704 to 706), and otherwise enters the normal standby state (703).

That is, the terminal (mobile station (MS) 11) enters the F-FCH in the method proposed in the present invention (704), and enters the F-SCH again (705). Subsequently, when the terminal (mobile station (MS) 11) enters the F-SCH, it receives the MBS service (706).

If the terminal (mobile station (MS) 11) receives a page message from the system during the MBS service (707), the terminal (mobile station (MS) 11) performs the associated call processing function (708) ). If not, the MBS service is continuously received (709). If the subscriber terminates the MBS service (710), the MBS processing is terminated and the standby state immediately before the MBS (711).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the present invention has the effect of effectively providing a multimedia service in the CDMA-2000 having limited radio section capacity.

Claims (11)

In the multimedia broadcasting service method in a wireless communication system, In response to a request for a multimedia broadcasting service from a terminal, a base station interworking terminals wishing for a multimedia broadcasting service to an internet protocol (IP) network using a service option; A second step of the multimedia broadcasting service server interworking with the internet protocol (IP) network sharing the terminal with the traffic channel for multimedia broadcasting service and registering the multimedia broadcasting service in the multimedia broadcasting service; Transmitting, by the multimedia broadcasting service server, corresponding multimedia broadcasting information provided by an information provider to the base station through the multimedia broadcasting service traffic channel; Transmitting, by the base station, an acknowledgment message of the corresponding multimedia broadcasting information to the multimedia broadcasting service server; And A fifth step of the base station broadcasting the corresponding multimedia broadcasting information in a one-way direction through a wireless section to the corresponding terminal registered in the multimedia broadcasting service using the traffic channel for the multimedia broadcasting service; Multimedia broadcasting service method using a traffic channel in a wireless communication system comprising a. The method of claim 1, A sixth step of transmitting, by the base station, a terminal call message to a corresponding terminal when the multimedia broadcasting service is performed; Multimedia broadcasting service method using a traffic channel in a wireless communication system further comprising. The method of claim 2, The terminal, When receiving a general call message transmitted to a traffic channel for a multimedia broadcasting service during a multimedia broadcasting service, a selection may be displayed on a screen, and a response may be sent to an access channel by transitioning to a standby state according to a user's request. Multimedia broadcasting service method using a traffic channel in a wireless communication system. The method according to any one of claims 1 to 3, The traffic channel for the multimedia broadcasting service, A multimedia broadcasting service method using a traffic channel in a wireless communication system comprising a forward supplemental channel (F-FSH) and a forward fundamental channel (F-FCH). The method of claim 4, wherein The terminal, The multimedia broadcasting service method using a traffic channel in a wireless communication system characterized in that the multimedia broadcasting service server periodically checks whether the multimedia broadcasting service availability from the extended channel allocation message (ECAM). The method of claim 5, The terminal, In a wireless communication system, the multimedia broadcasting information is received through a forward supplemental channel (F-FSH) of the traffic channel for the multimedia broadcasting service, and a control signal uses a forward control channel (F-FCH) common control channel. Multimedia broadcasting service method using a traffic channel. The method of claim 5, The terminal, Search the base station distribution and the received electric field strength by running a searcher by itself, but when the base station with strong received electric field strength is found and the handoff time comes, handoff is performed immediately without reporting to the base station for continuous multimedia broadcasting service. Multimedia broadcasting service method using a traffic channel in a wireless communication system, characterized in that receiving. The method of claim 4, wherein The multimedia broadcasting service server, The terminal is obtained through the multimedia broadcasting service presence field (REG_TYPE) information of a registration message transmitted after the terminal acquires a forward supplemental channel (F-FSH) and a forward fundamental channel (F-FCH) for the multimedia broadcasting service. Multimedia broadcasting service method using a traffic channel in a wireless communication system, characterized in that it is known that the multimedia broadcasting service. The method of claim 4, wherein The protocol stack structure for the multimedia broadcasting service, In practice, a codec processing unit for processing multimedia, a real time protocol (RTP) processing unit, a user datagram protocol (UDP) processing unit, which is a standard transport protocol, and an internet protocol (IP) Internet Protocol) processing unit, and the layer 1 and layer 2 defined in the IS-2000, the multimedia broadcasting service method using a traffic channel in a wireless communication system. In a wireless communication system having a processor for a multimedia broadcasting service, A first function of a base station interworking terminals wishing for a multimedia broadcasting service to an internet protocol (IP) network using a service option according to a multimedia broadcasting service request from a terminal; A second function of sharing, by the multimedia broadcasting service server linked to the Internet Protocol (IP) network, the corresponding terminal with the traffic channel for multimedia broadcasting service and registering the multimedia broadcasting service; A third function of transmitting the multimedia broadcasting information provided by the information provider from the multimedia broadcasting service server to the base station through the traffic channel for the multimedia broadcasting service; A fourth function of transmitting, by the base station, a reception acknowledgment message of the corresponding multimedia broadcasting information to the multimedia broadcasting service server; And A fifth function of broadcasting, by the base station, to the corresponding terminal registered in the multimedia broadcasting service using the traffic channel for the multimedia broadcasting service in one direction through the wireless section; A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 10, A sixth function of transmitting, by the base station, a terminal call message to a corresponding terminal when the multimedia broadcasting service is performed; A computer-readable recording medium that records a program for further realization.