KR20030066048A - Method for broadcast service in mobile communication system - Google Patents

Abstract

PURPOSE: A broadcasting service method of a mobile communication system is provided to set a separate broadcasting service channel to provide broadcasting service to users while minimizing network resources required for the broadcasting service. CONSTITUTION: It is confirmed whether or not a mobile terminal is a broadcasting service subscriber and the mobile terminal is registered when a base station receives a broadcasting service start message from the mobile terminal(411). A radio channel and a radio network-packet data service node channel are set(415). A radio channel and radio network-packet data service node channel for broadcasting service are set(417). When the mobile terminal requests broadcasting service to be finished(419), the radio channel and packet data service node are canceled(420), and the radio channel and packet data service node channel for broadcasting service are canceled(422).

Description

Broadcasting service method of mobile communication system {METHOD FOR BROADCAST SERVICE IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a broadcast service of a mobile communication system, and more particularly, to a broadcast service method of a code division multiple access system.

With the development of mobile communication technology, Korea's wireless Internet population has exceeded 15 million. With the steady development of the mobile communication technology, the use of the mobile communication terminal is also providing a data communication service instead of providing a simple voice call service. In particular, as the IMT-2000 technology called dream mobile communication has been promoted in earnest, mobile communication terminals have become available. The CDMA-2000 1x service, which is called the forerunner of IMT-2000 service, is based on IS-95. The main difference between CDMA-2000 1x service and basic voice call service is that it can provide data service with bit rate of up to 144 kbps. The CDMA-2000 1x service is one of the connection methods between the mobile communication terminal and the base station. The CDMA-2000 1x service compresses data and wirelessly transmits video even at high speed. CDMA-2000 1x service has the advantage that there is no problem in compatibility by accepting the lower service functions such as IS-95A or IS-95B. In addition, it is not to use a new frequency band, but to develop an existing mobile phone wireless network, so there is an advantage that the number of the mobile communication terminal currently used can be used as it is. Accordingly, the present invention seeks to provide a broadcast service utilizing the above advantages of the CDMA-2000 1x service.

Conventionally, the CDMA-2000 1x system did not provide a broadcast service. In order to provide a broadcast service through the CDMA-2000 1x system, a radio channel and an RP channel should be allocated to each user for data transmission of the broadcast service. The RP channel refers to a channel from a radio network (RN) to a packet data serving node (PDSN). The RP channel is assigned to each subscriber by the point-to-point protocol (PPP) configuration between the mobile station (MS) and the packet data service node. In addition, the packet data service node registers a group for multicast in a router using an Internet Group Management Protocol (IGMP) message, receives a message to be received from a broadcasting server, and transmits the message for each subscriber. However, the above method should allocate resources required for broadcasting service on a subscriber basis. Therefore, in a wireless environment, since a large number of subscribers requiring large bandwidths cannot be accommodated at once, this is a practically impossible method.

Accordingly, an object of the present invention is to provide a broadcast service method capable of receiving a broadcast service while minimizing network resources required for the broadcast service by setting a separate broadcast service channel.

The present invention for achieving the above object, in the broadcast service method of a mobile communication system, when the base station receives the start message of the broadcast service from the mobile terminal, the process of confirming and registering that the mobile terminal is a broadcast service subscriber; Setting a wireless channel and a wireless network-packet data service node channel; and setting a wireless channel and a wireless network-packet data service node channel for a broadcast service; and requesting to terminate the broadcasting service of the mobile terminal. The present invention proposes a broadcast service method of a mobile communication system comprising releasing a packet data service node channel and releasing a broadcast service radio channel and a packet data service node channel.

The present invention also provides a process for receiving an Internet group management protocol message from a mobile terminal in a packet data service node, transmitting the message to a broadcast server, and confirming and managing that the mobile terminal is a registered subscriber of a broadcast service. The present invention proposes a broadcast service method of a mobile communication system, which comprises a process of transmitting packet data transmitted from a server to a base station through a wireless network-packet data channel for a broadcast service.

1 is a network diagram of a code division multiple access mobile communication system according to the present invention;

2 is a signal flow diagram illustrating a broadcast service procedure performed using a simple IP according to an embodiment of the present invention.

3 is a signal flow diagram illustrating a broadcast service procedure performed using a mobile IP according to an embodiment of the present invention.

4 is a flowchart illustrating a call processing procedure in a base station according to the setting of a channel for a broadcast service according to an embodiment of the present invention.

5 is a flowchart illustrating a call processing procedure in a packet data service node according to a broadcast service channel setting according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

1 is a network diagram of a code division multiple access mobile communication system according to the present invention. Referring to FIG. 1, the mobile terminal 100 is a terminal capable of performing voice and data communication, and according to the present invention, a terminal capable of receiving a broadcast service. The mobile station MS-100 is connected to a base transmission system BTS-102 via a radio network. The base station transmission system 102 is connected to a corresponding base station controller 104 to perform wireless connection with each of the mobile terminals 100. The base station transmission system 102 to the base station controller 104 includes overall call processing such as a voice call, a circuit call, a packet call, and the like for each of the mobile terminals 100. Intervene in Processing. In addition, the base station transmission system 102 performs a signaling operation with a mobile switching center (MSC-106). The mobile switch 106 is responsible for transmitting and receiving data and control signals with a public switching telephone network / public load mobile network (PSTN / PLMN-124) and an internet network (INTERNET-128). do. At this time, the IWF (Internet Working Function) 122 has a fax (FAX), a modem pool (POOL) and the Internet matching function. When the mobile terminal 100 requests data communication services such as PC communication, Internet communication, fax communication, etc., the IWF 122 interworks with the mobile switching center 106 to transmit / receive faxes in the public telephone network / mobile communication network 124. By performing data communication with a modem or by using an internet matching function, the mobile terminal 100 can use an Internet service. When the mobile switch 106 performs a registration procedure such as location registration, additional service registration, etc. of the mobile terminal 100, the mobile switch 106 registers a home location register (HLR-108) and a visitor location register (VLR). Register). The home location register 108 is a database that stores subscriber information and is connected to the mobile switch. When the subscriber attempts to communicate, the home location register 108 serves to provide information such as whether the subscriber is a valid subscriber, what service is being used, or where he is currently located. The visitor location register for the visitor is typically implemented within the mobile switchboard 106. The home location register 108 is a database that permanently stores subscriber information, and the visitor location register 106 is a database that temporarily stores visitor information. Global Area Network (GAN) 112 is a data communication network that serves users in large areas and often uses transport services provided by common carriers. A base station manager (BSM-114) is a system that performs operations and maintenance functions of the base station transmission system 102 and the base station controller 104 and controls a plurality of base station controllers 104. The packet data service node 116 is responsible for interfacing between two networks between a wireless access network and a data core network (DCN-116). The data core network 116 refers to a portion of a network that provides data services in a packet-switched manner. AAA (Authentication, Authorization, and Accounting-120) server performs authentication, authorization, and billing for users. The home agent (HA-122) is located in a home network of a mobile communication network and serves as a gateway for a mobile IP user to access the Internet. The home agent 122 performs functions such as initial registration, IP routing, address management of mobile subscribers, and mobile information management to provide access to various servers of mobile IP and the Internet. The Internet 128 is a huge global network that connects all kinds of computers and networks around the world using certain protocols. The broadcast server 130 receives broadcast database related statistical information according to an embodiment of the present invention.

In the present invention, the base station system (BSS-103) and the packet data service node 116 manage subscribers for broadcast services in addition to the existing functions. The base station 103 collectively refers to the base station transmission system 102 and the base station controller 104. The base station 103 manages subscribers on an International Mobile Subscriber Identifier (IMSI) basis and on the packet data service node 116 on an Internet Protocol (IP) basis. The IMSI is used for authentication when connecting to the system and is similar to each subscriber's telephone number.

In setting up a separate broadcast service channel for a broadcast service according to the present invention, the mobile terminal 100 is divided into a case of using a simple IP service and a case of using a mobile IP service. In the simple IP service, a mobile station subscriber receives a simple IP address through the packet data service node 116 or the AAA server 120 at a fixed location in an area of one base station transmission system 102 and receives a temporary IP address. Internet 128 or private network connection can be used. In other words, the simple IP service may use a freely assigned IP address in one base station transmission system 102, but when the data is transferred to another base station transmission system 102 during transmission, the connection of the Internet 128 is disconnected. . The mobile IP service, which is a relative concept of the simple IP service, is a service that can be provided with the same service in the home region by using the same IP address in another region using the IP address registered in the home agent server 120. The above classification is different depending on whether the IP of the mobile terminal 100 is registered in the home agent server 120 and performs data communication through the home agent 120.

2 is a signal flow diagram illustrating a mobile terminal performing a broadcast service procedure using a simple IP according to an embodiment of the present invention.

In step 201, the mobile terminal 100 selects one of the broadcast services to be serviced by the application layer and sends a start message to the base station 103 to inform the start of the service. The start message includes a feature indicating that the service is a broadcast service and includes selected channel information. The traffic channel established between the mobile terminal 100 and the base station 103 for a broadcast service is set to a minimum data rate. In step 202, the base station 103 receives the start message, confirms that the mobile terminal 100 is a subscriber to receive a broadcast service, and registers as a broadcast service subscriber. The base station 103 registers the mobile terminal 100 as a broadcast service subscriber and transmits an Ack (Acknowledgment) message to the mobile terminal 100. The Ack message is a notification sent from the base station 103 to the mobile terminal 100 to confirm that the start message is received. In step 203, a wireless channel between the mobile terminal 100 and the base station 103 is set. The base station 103 establishes a packet data service node 116 and a RP (radio network-packet data service node) channel. The same Walsh between the mobile terminal 100 and the base station 103 between subscribers receiving a broadcast service in addition to the channel set for the point-to-point protocol (PPP) between the mobile terminal 100 and the packet data service node 116 A radio channel using a code and a radio network-packet data service node (RP) channel are set. At this time, the common Walsh code assignment procedure for the broadcast service in the radio section follows the Walsh code assignment procedure for the basic channel that is performed in the standardization. In order to configure a channel for a broadcast service in a RP section, a packet control function (PCF) inside the packet data service node 116 and the base station (BSS) may be assigned to a specific generic routing encapsulation (GRE). A sequence number is used for a broadcast service, and the specific GRE sequence number is not used in a general service. There may be one or more radio channels and RP (radio network-packet data service node) channels used for the broadcast service, and the operator may register how many channels to use. In step 204, a link control protocol (LCP) procedure between the mobile terminal 100 and the packet data service node 116 is performed. The link control protocol is used to establish a point-to-point protocol (PPP) connection, and is a protocol for fixing, establishing, and inspecting a data link connection. In step 205, after the link control protocol process in step 204, the authentication procedure between the mobile terminal 100 and the AAA server 120 is performed. In step 206, the point-to-point (PPP) link setting is completed by an IP Configuration Protocol (IPCP) process between the mobile terminal 100 and the packet data service node 116. The IP configuration protocol (IPCP) is a routing technique that can pass IP traffic from one source device to a large number of receiving devices or from many source devices to many receiving devices, and does not send one packet to each receiving device. This means that a packet is sent to a multicast group separated by a single IP receiving group address. In step 207, the packet data service node 116 notifies the AAA server 120 of the start of charging. In step 208, the application layer of the mobile terminal 100 transmits an Internet Group Management Protocol (IGMP) message to the packet data service node 116 through a point-to-point protocol (PPP), and broadcast server. Performs a procedure to transmit to 130. When the packet data service node 116 receives the message and indicates that the mobile terminal 100 is a subscriber among the Internet group management protocol messages, the packet data service node 116 transmits the mobile terminal 100 that has transmitted the message to the subscriber for a broadcast service. Manage with. The Internet Group Management Protocol (IGMP) is a protocol for notifying a multicast router of which multicast group an IP host is participating in. In step 209, the packet data service node 116 transmits the Internet group management protocol message transmitted from the mobile terminal 100 to the broadcast server 130. In step 210, the broadcast server 130 transmits packet data for a broadcast service to the mobile terminal 100 through a multicast address. The multicast address refers to a single address pointing to a plurality of network devices. When the broadcast packet data is transmitted from the broadcast server 130 to the packet data service node 116 in step 211, the packet data is a separate broadcast service set between the base station 103 and the packet data service node 116. It is delivered to the base station 103 via a radio network-packet data service node (RP) channel. In step 212, the base station 103 transmits the packet data to the mobile terminal 100 through a wireless channel allocated by a Walsh code for broadcasting. In step 213, the mobile terminal 100 transmits a message for terminating a service in the Internet Group Management Protocol message to the packet data service node 116 to terminate the service. In step 214, the packet data service node 116 transmits the message to the broadcast server 130 when it indicates group withdrawal from the Internet group management protocol message received from the mobile terminal 100. The mobile terminal 100 is deleted from the broadcast service subscriber list. In step 215, if the mobile terminal 100 receives an instruction for terminating the broadcast service from the application layer, the mobile terminal 100 performs a radio channel release procedure to the base station 103. At this time, the released radio channel is released from the radio channel set for the point-to-point protocol settings, the radio channel for the broadcast service is not released. In step 216, the base station 103 performs a release procedure of RP (wireless network-packet data service node) setting to the packet data service node 116. At this time, the released RP (radio network packet data service node) channel releases the RP (radio network packet data service node) channel set for the point-to-point protocol setting, and the broadcast service RP (radio network packet data). Service node) channel is not released. In step 217, the packet data service node 116 transmits charging stop information to the AAA server 120 to stop charging for the subscriber.

3 is a signal flow diagram illustrating a broadcast service procedure performed by a mobile terminal using mobile IP according to an embodiment of the present invention.

In step 301, the mobile terminal 100 selects one of the broadcast services to be serviced by the application layer and sends a start message to the base station 103 to inform the start of the service. The start message includes a feature indicating that the service is a broadcast service and includes selected channel information. The traffic channel established between the mobile terminal 100 and the base station 103 for a broadcast service is set to a minimum data rate. In step 302, the base station 103 receives the start message, confirms that the mobile terminal 100 is a subscriber to receive a broadcast service, and registers as a broadcast service subscriber. The base station 103 registers the mobile terminal 100 as a broadcast subscriber and transmits an Ack message to the mobile terminal 100. In step 303, a wireless channel between the mobile terminal 100 and the base station 103 is established. The mobile terminal 100 establishes a packet data service node 116 and an RP (radio network-packet data service node) channel. The same Walsh code is used between the mobile terminal 100 and the base station 103 among subscribers receiving a broadcast service in addition to the channel set for the point-to-point protocol between the mobile terminal 100 and the packet data service node 116. A radio channel and a broadcast network packet data service node (RP) channel are set. At this time, the common Walsh code assignment procedure for the broadcast service in the radio section follows the Walsh code assignment procedure for the basic channel that is performed in the standardization. In order to set a channel for a broadcast service in an RP section, a packet control function (PCF) inside the packet data service node 116 and the base station 103 may be assigned to a specific generic routing encapsulation (GRE). The sequence number is used for broadcasting, which is not used in general service. There may be one or more radio channels and RP (radio network-packet data service node) channels used for the broadcast service, and the operator may register how many channels to use. In step 304, a link control protocol (LCP) procedure between the mobile terminal 100 and the packet data service node 116 is performed. The link control protocol is used to establish a point-to-point protocol (PPP) connection, and is a protocol for fixing, establishing, and inspecting a data link connection. Step 305 completes the point-to-point link setup through the IP Configuration Protocol (IPCP) process. Steps 301 to 305 are the same as those of 201 to 205 when a broadcast service is provided using a simple IP service. However, the authentication procedure is not performed during the point-to-point protocol between the mobile terminal 100 and the packet data service node 116. In step 306, the mobile terminal 100 performs a mobile IP registration procedure from the packet data service node 116. Step 306 is applicable only when the mobile terminal 100 receives a broadcast service using a mobile IP. In step 307, the packet data service node 116 receives a registration request (RRQ) for a multichannel interface processor (MIP) from the mobile terminal 100. In step 308, the packet data service node 116 receives the registration request (RRQ). The authentication procedure is performed with the node 116 and the AAA server 120. If authentication between the packet data service node 116 and the AAA server 120 is successfully performed in step 309, the packet data service node 116 transmits the multichannel interface processor (MIP) from the mobile terminal 100. The registration request (RRQ) message for the home agent server 122 to perform a mobile IP registration process. In step 310, when the registration process of the mobile IP with the home agent 122 is successfully performed in step 309, the packet data service node 116 responds to the mobile IP registration with the mobile terminal 100. (Registration Response: RRP). This completes the mobile IP registration process. In step 311, the packet data service node 116 informs the AAA server 120 of the start of charging. In step 312, the application layer of the mobile terminal 100 performs a procedure for transmitting the Internet group management protocol message to the broadcast server 130 by the point-to-point protocol. The packet data service node 116 receives the message, and when the message indicates that the mobile terminal 100 subscribes to a message of the Internet Group Management Protocol, the mobile terminal 100 is a subscriber of a broadcast service. Manage with. In step 313, the packet data service node 116 transmits an Internet group management protocol message received from the mobile terminal 100 to the broadcast server 130. In step 314, the broadcast server 130 transmits packet data for a broadcast service to the corresponding mobile terminal 100 through a multicast address. When the broadcast service packet data is transmitted from the broadcast server 130 to the packet data service node 116 in step 315, the packet data is set separately between the base station 103 and the packet data service node 116. It delivers to the base station 103 through a RP (radio network-packet data service node) channel for a broadcast service. In step 316, the packet data transmitted to the base station 103 is transmitted to the mobile station 100 through a wireless channel using a Walsh code allocated for a broadcast service. In order to terminate the broadcast service to be used in step 317, the mobile terminal 100 transmits a message for terminating the service of the Internet Group Management Protocol message to the packet data service node 116 to terminate the service. In step 318, the packet data service node 116 transmits the message to the broadcast server when it indicates withdrawal of the group from the Internet group management protocol message transmitted from the mobile terminal 100. The mobile terminal 100 is deleted from the broadcast service subscriber list. In step 319, if the mobile terminal 100 receives an instruction to terminate the service from the application layer, it performs a radio channel release procedure. At this time, the radio channel released is released from the radio channel set to set the point-to-point protocol, and the radio channel for the broadcast service is not released. In step 320, the base station 103 performs a RP (radio packet-service data node) channel release procedure on the packet data service node 116. At this time, the RP channel is released from the RP channel, which is set up for the point-to-point protocol, and the broadcast RP channel is set for broadcast. The channel is not released. In step 321, the packet data service node 116 transmits charging stop information to the AAA server 120 to stop charging for a subscriber who receives a broadcast service.

4 is a flowchart illustrating a call processing procedure in a base station according to setting and releasing of a broadcast service channel according to an embodiment of the present invention. Referring to FIG. 4, in step 411, the base station 103 receives a start message from the mobile terminal 100. The start message includes a feature indicating that the broadcast service. In step 412, the base station 103 checks whether the mobile terminal 100 is a terminal to be provided with a broadcast service. In the case where the terminal does not require the provision of the broadcast service according to the check result of step 412, the terminal proceeds to step 413 to perform a normal call processing procedure. In case of the terminal to be provided with the broadcast service, the process proceeds to step 414. In step 414, the base station 103 registers the mobile terminal 100 as a broadcast service subscriber and manages the subscriber in units of an International Mobile Subscriber Identifier (IMSI). In step 415, a wireless channel between the mobile terminal 100 and the base station 103 is set, and an RP (radio network-packet data service node) channel is set between the base station 103 and the packet data service node 116. . In step 416, the presence of a radio service and a RP (radio network-packet data service node) channel for a broadcast service between another mobile station and a base station is examined. If it does not exist according to the check result of step 416, the method proceeds to step 417 and performs a radio channel and a packet network service node (RP) channel setting procedure for a broadcast service. The radio channel follows the Walsh code assignment procedure for the common channel between the radio terminal of the mobile station 100 and the base station 103. In addition, the packet data service node 116 should use a specific generic routing capsulation (GRE) sequence number to set a channel for a broadcast service in an RP (radio network-packet data service node) section, which is not used for general service. Do not. There may be more than one radio channel and PR (radio network-packet data service node) channel for a broadcast service, and the number of channels is registered by the network operator by how many channels to use for broadcasting. If there is a broadcast radio channel and a RP (radio network-packet data service node) channel in step 416 and the channels for broadcast service are set in step 417, the flow proceeds to step 418. In step 418, the broadcast data is provided to the mobile terminal 100 registered as a subscriber through the packet data transmitted from the broadcast server 130 through a wireless network-packet data service node (RP) channel and a wireless channel. In step 419, the base station 103 checks whether there is a broadcast service termination request from the mobile terminal 100. If there is no broadcast service interruption request according to the check result of step 419, the process proceeds to step 418 to receive a broadcast service. If there is a broadcast service termination request, the process proceeds to step 420 where the radio channel set for the point-to-point protocol setting between the mobile terminal 100 and the base station 103 that requested the broadcast service termination is released, and for broadcast service The radio channel is not released. The RP (radio network-packet data service node) channel established for the point-to-point protocol setting between the base station 103 and the packet data service node 116 is released, and the RP (radio network-packet data) for a broadcast service is released. Service node) is not terminated. In step 421, the presence of another broadcast service subscriber who receives a broadcast service to the base station 103 is checked. If there is a broadcast service subscriber according to the check result of step 421, the process proceeds to step 422 to maintain a broadcast service channel. If there is no other broadcast service subscriber, the process proceeds to step 422 to release the radio service channel and the RP channel.

5 is a flowchart illustrating a call processing procedure in a packet data service node according to a channel setting for a broadcast service according to an embodiment of the present invention.

Referring to FIG. 5, in operation 511, the packet data service node 116 receives an Internet group management protocol message from the mobile terminal 100. In step 512, the packet data service node 116 receiving the Internet Group Management Protocol (IGMP) message transmits the message to the broadcast server 130. In step 513, the mobile terminal 100 checks whether it is registered as a broadcast service subscriber. If the mobile terminal 100 is not registered in step 513, the mobile terminal 100 proceeds to step 514 to delete it from the broadcast service subscriber list. If the mobile terminal 100 is registered as a broadcast service subscriber, the mobile terminal 100 proceeds to step 515 and manages the packet data service node 116 by IP unit. In step 516, the packet data service node 116 transmits the broadcast service packet data transmitted from the broadcast server 130 through a broadcast service packet data service node (RP) channel set to the base station 103.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

The present invention as described above, by setting a separate broadcast service channel in the code division multiple access system, it is possible to minimize the use of radio resources required for the broadcast service, high-quality broadcast services such as color graphics, video, etc. There is an advantage that can provide.

Claims (4)

In the broadcast service method of a mobile communication system, When the base station receives a start message of a broadcast service from a mobile terminal, confirming and registering that the mobile terminal is a broadcast service subscriber; Setting a wireless channel and a wireless network-packet data service node channel; Setting a wireless channel for a broadcast service and a wireless network-packet data service node channel; And releasing a radio channel and a packet data service node channel and releasing a broadcast service radio channel and a packet data service node channel when the mobile terminal terminates the broadcast service request. The method of claim 1, When the broadcast service termination request of the mobile terminal. If there is another broadcast service subscriber receiving the broadcast service at the base station, the radio channel and the radio network-packet data service node channel are released and the radio service channel and the radio network-packet data service node channel are maintained. Broadcast service method of a mobile communication system, characterized in that made. In the broadcast service method of a mobile communication system, Receiving, by the packet data service node, an internet group management protocol message from the mobile terminal; Transmitting the message to a broadcast server to identify and manage the mobile terminal as a registered subscriber of a broadcast service; And transmitting the packet data transmitted from the broadcasting server to the base station through the wireless network-packet data channel for the broadcasting service. The method of claim 2, And deleting the mobile terminal from the broadcast service subscriber list when the mobile terminal is not registered as a broadcast subscriber in the packet data service node.