KR101042359B1 - Method and apparatus for providing multicasting service in wireless internet network - Google Patents

Abstract

The present invention relates to a method and apparatus for providing multicasting data received from a base station to a mobile host (MOBILE HOST).

In the present invention, when the mobile host is located in the inter-cell overlapping area, the multicast group request message is simultaneously transmitted to the adjacent base stations, and then at least one or more base stations having a good connection state are selected according to the signal size received from the adjacent base stations. . The multicast group request message is simultaneously transmitted to the selected base station, and then the multicast data having the optimal quality is selected and received from the multicasting data received from the selected base station. Thereafter, the received multicasting data is reproduced through the multimedia player in the mobile host. On the other hand, if the mobile host is out of the inter-cell overlapping area, and release the establishment path with the base station that manages the cell that was located before the movement.

Through this, it is possible to provide a seamless multimedia service irrelevant to the mobility of the mobile host, and when applying the concept of Quality of Service, efficient data management and stable multimedia service can be provided.

Wireless Internet Networks, Mobile Hosts, Multicasting, Multimedia Services

Description

METHOD AND APPARATUS FOR PROVIDING MULTI-CASTING SERVICE IN WIRELESS INTERNET NETWORK}

1 is a diagram illustrating a schematic configuration of an apparatus for providing a multicasting service according to an embodiment of the present invention.

2 is a diagram illustrating a detailed configuration of an apparatus for providing a multicasting service according to an embodiment of the present invention.

3 is a flowchart sequentially illustrating an operation process of an apparatus for providing a multicasting service according to an embodiment of the present invention.

The present invention relates to a method and apparatus for providing a multicasting service, and more particularly, to a method and apparatus for providing a multicasting service using soft handover (SOFT HAND-OVER).

Recently, due to the development of wireless Internet technology, various related technologies have emerged, and one of them, multimedia services, is also rapidly increasing in related technology and its use population.

A multimedia service is a telecommunications service that provides exchange of information consisting of text and numerical data, images, moving pictures, voices, and the like, and has the same meaning as a multimedia communication service.

Meanwhile, in the wireless Internet environment, the Internet Engineering Task Force (IETF) recommends the use of a mobile IP to support the mobility of a mobile host (hereinafter referred to as 'MH') in an IP network. .

Mobile IP (IP) is based on the support for unicast (unicast), so that the existing MH receives the multimedia content in the form of unicast.

However, such a unicast support method does not support a multi-cast method, which is efficient in terms of network, for a multimedia service when the accessing base station changes frequently as the MH moves, such as a wireless Internet environment. have.

For this reason, as a method for supporting multicast in mobile IP, a home agent-based routing technique and a foreign agent-based routing technique are proposed, but this is also incessant for a moving MH. It does not provide services that are missing. In addition, since these routing techniques have not been tested and applied to large networks, it is difficult to employ them in commercial networks.

 The technical problem to be solved by the present invention is to solve such a problem, by providing a base station having a good connection with the mobile host to prepare the multicasting data in advance, thereby providing a seamless multimedia service irrelevant to the movement of the mobile host The present invention provides a method and apparatus for providing a multicasting service in a wireless Internet network that can be provided.

In addition, the present invention by selecting and receiving the multicasting data having the optimal quality, when applying the concept of Quality of Service (Multiplicity of Service) in the multi-wireless network that can provide efficient data management and stable multimedia services It is to provide a casting service providing method and a device thereof.

According to an aspect of the present invention, there is provided a method of providing a multicasting service in a wireless Internet network, the method comprising: providing a multicasting data received from a base station to a mobile host; Simultaneously transmitting a multicast group request message to an adjacent base station if is located in an intercell overlap region; b) selecting at least one or more base stations with good connectivity according to the signal magnitude received from the adjacent base station; c) simultaneously transmitting a multicast group request message to the selected base station; d) selectively receiving the multicasting data received from the selected base station; And e) playing the selectively received multicasting data through a multimedia player in the mobile host.                     

In addition, f) if the mobile host is out of the inter-cell overlapping area, further comprising the step of releasing the establishment path with the base station that manages the cell that was located before the movement.

In addition, an apparatus for providing a multicasting service in a wireless Internet network according to an aspect of the present invention is an apparatus for providing multicasting data received from a base station to a mobile host (MOBILE HOST), according to location information received from the base station. A positioning unit to check a location of the mobile host; A path setting unit configured to set a radio path between an adjacent base station and the mobile host when the mobile host is located in an overlapping region between cells; A group request unit which simultaneously transmits a message requesting to join a multicast group to an adjacent base station through the set radio path; A base station selection / request unit for selecting at least one base station having a good connection state according to a signal size received from the adjacent base station, and then simultaneously transmitting a multicast group request message to the selected base station; A data selection / reception unit for selectively receiving multicasting data received from the selected base station; And a multicasting service provider for reproducing the selectively received multicasting data through a multimedia player in the mobile host.

In addition, a recording medium storing a program according to an aspect of the present invention, the recording medium comprising a method for providing a multicasting data received from the base station to the mobile host (MOBILE HOST), a) the mobile host overlaps between cells When located in a local area, simultaneously transmitting a multicast group request message to an adjacent base station; b) selecting at least one or more base stations with good connectivity according to the signal magnitude received from the adjacent base stations; c) simultaneously transmitting a multicast group request message to the selected base station; d) selectively receiving multicasting data received from the selected base station; And e) a computer-readable recording medium having recorded thereon a program including a function of playing the selectively received multicasting data through a multimedia player in the mobile host.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

In the following embodiment of the present invention, a base station managing a cell, which is a region before the mobile host moves, is called a first base station, and a base station transmitting optimal multimedia data is called a second base station for convenience of description. .

1 is a diagram illustrating a schematic configuration of an apparatus for providing a multicasting service according to an exemplary embodiment of the present invention.

As shown in FIG. 1, a mobile host 200 having mobility includes a multicasting service providing apparatus 100 according to an exemplary embodiment of the present invention, and the mobile host 100 includes a first base station 310. ) Is located in the first cell 311 managed by.

The multicasting service providing apparatus 100 constituting such a structure will be described in detail. First, the multicasting service providing apparatus 100 of the mobile host 100 connects to the multicast service providing server 700. The casting service providing apparatus 100 selects a desired service channel and then performs a predetermined authentication procedure such as subscriber authentication through the selected channel.

Thereafter, the multicasting service providing apparatus 100 generates a multicast group participation request message (hereinafter referred to as 'IGMP'), and then generates a multicast group participation request message (IGMP-report). Is transmitted to the first base station 310 through a wireless link that is already set.

Then, the switch and the router (not shown) of the first base station 310 transmits the received multicast group participation request message (IGMP-report) to the router 600 via the home agent 500, and the router 600. Checks whether the received multicast group join request message (IGMP-report) is appropriate.

Subsequently, the router 600 establishes a transmission path to the mobile host 200 through IGMP-snooping (a function of allowing multicasting data to be transmitted through an appropriate path) in conjunction with a subnet router (not shown) according to the verification result. do.

Thereafter, the multicasting service providing apparatus 100 receives the multicast data from the multicasting service providing server 700 through the set transmission path, and then receives the multicasting data received through the multimedia player in the mobile host 200. Let it play.

Thereafter, when the mobile host 200 moves and is located in an area A where the first cell 311 and the second cell 312 overlap, the multicasting service providing apparatus 100 establishes a radio link with an adjacent base station. After setting, the multicast group join request message (IGMP-report) is simultaneously transmitted to the adjacent base station through the established wireless link.

Thereafter, the apparatus 100 for providing a multicasting service selects at least one or more base stations (called 'selective base stations') for the convenience of explanation according to a connection state with an adjacent base station and requests to join a multicast group. Send a message (IGMP-report) at the same time. At this time, the multi-casting service providing apparatus 100 confirms a connection state with an adjacent base station according to a state of a radio link established with each base station.

As such, the apparatus 100 for providing a multicasting service 100 according to an embodiment of the present invention transmits an IGMP-based group participation request message to a selection base station having a good connection in advance, thereby allowing each selection base station to prepare multicasting data in advance. Do it. This, in turn, provides the mobile host 200 with a continuous multimedia service.

Thereafter, each selected base station that receives the multicast group participation request message (IGMP-report) checks whether the service channel requested by the multicasting service providing apparatus 100 is used by another mobile host in the base station.

As a result of the check, if another mobile host in the base station is used, each selected base station registers the mobile host 200 located in the cell overlap region (A) to the multicast group.

On the other hand, if the checked service channel is not used by another mobile host, each selected base station registers the mobile host 200 in the multicast group, and then sets a path with the mobile host 200 through a switch and a router. .

Thereafter, the multicasting service providing apparatus 100 selects and receives the multicasting data having the best quality from among the multicasting data received from each selected base station. In this case, the multicasting service providing apparatus 100 selects each selected base station. After measuring the size of a synchronization signal or a system setup related signal received from the multi-casting data from the selected base station (second base station, 410 in the preferred embodiment of the present invention) excellent connection state according to the measurement result.

As described above, in the embodiment of the present invention, after selecting the base station having the best connection state among several adjacent base stations, the multicasting data is received from the second base station 410 which is the selected base station.

However, in the embodiment of the present invention, the best connection state does not receive data from the second base station 410, but the performance of the second base station 410 is constant when comparing the performance with the first base station 310. Receive data only if there is a difference above the level. That is, the handover occurs only when the second base station 410 has a RF level or a data receiving capability more than a certain level than the first base station 310.

This is to suppress handover with the base station that occurs even when the subscriber moves only in the cell overlapping area, and is to prevent performance degradation due to unnecessary data processing of the base station.

Thereafter, the multicasting service providing apparatus 100 may reproduce the multicasting data received from the second base station 410 through a multimedia player (for example, a window media player or a real player) in the mobile host 200. .

Subsequently, when the mobile host 200 leaves the cell overlap region A, when the mobile station 200 uses the service channel used by the mobile host 200 by another mobile host in the first base station 310, Release the mobile host 200 from the multicasting group.

On the other hand, if the service channel used by the mobile host 200 is not used by another mobile host in the first base station 310, the first base station 310 deletes the mobile host 200 from the multicasting group, and then the router Deletes even the route information with (600). It also stops multicasting data transmission.

As such, the multi-casting service providing apparatus 100 according to an exemplary embodiment of the present invention accommodates a large number of users at the same time by establishing a wireless link between a base station and a mobile host, thereby increasing the profitability and enormous facilities due to the construction of a terrestrial network. It can reduce the investment cost.

In addition, by selecting and receiving data having an optimal quality among the multicasting data transmitted by the selected base station, when the concept of Quality of Service is applied, efficient data management and stable multimedia service can be provided.

Then, the detailed configuration of the multicasting service providing apparatus 200 according to an embodiment of the present invention will be described through the accompanying drawings.                     

FIG. 2 is a diagram illustrating a detailed configuration of a multicasting service providing apparatus according to an exemplary embodiment of the present invention, and illustrates main components when the mobile host 200 is located in a cell overlap region A. Referring to FIG. .

As shown in FIG. 2, the apparatus 100 for providing a multicasting service according to an exemplary embodiment of the present invention may include a positioning unit 110, a route setting unit 120, a group requesting unit 130, and a base station selection / requesting unit ( 140, a data selector / receiver 150, a multicasting service provider 160, and a group canceler 170.

In detail, first, the location checker 110 checks the location of the mobile host 200 according to the location information received from each base station.

If it is determined that the mobile host 200 is located in the inter-cell overlapping area A, the routing unit 120 establishes a radio link with an adjacent base station.

The group request unit 130 simultaneously transmits a first multicast group participation request message (IGMP-report) to an adjacent base station through the established wireless link.

The base station selection / request unit 140 selects at least one base station having a good connection state by checking a connection state with a neighbor base station according to a base station response signal for the first request message transmitted to the neighbor base station, and then selects A second multicast group join request message (IGMP-report) is simultaneously transmitted to the base station.

The data selecting / receiving unit 150 selects a base station (second base station, 410) that transmits multicasting data having an optimal quality among the multicasting data transmitted from each selected base station, and then multiplies from the second base station 410. Receive casting data.                     

At this time, the data selecting / receiving unit 150 measures the size of a synchronization signal or a system setting related signal received from each selected base station, and then selects a base station having excellent connection state according to the measured result.

In addition, the data selecting / receiving unit 150 receives the multicasting data from the second base station 410 only when the performance of the second base station 410 differs from the first base station 310 by a certain level or more. do.

The multicasting service provider 160 allows the multicasting data selected and received from the second base station 410 to be played through a multimedia player (for example, a window media player or a real player) in the mobile host 200.

When the group release unit 170 determines that the mobile host 200 moves out of the inter-cell overlapping area A to the second cell 411 by moving the location, the group release unit 170 releases a setting path from the first base station 310 and Ungroup, etc.

Next, the operation process of the multi-casting service providing apparatus 100 having such a configuration will be described.

3 is a flowchart sequentially illustrating an operation process of an apparatus for providing a multicasting service according to an exemplary embodiment of the present invention, which is a flowchart of providing a service when the mobile host 200 moves to an inter-cell overlapping area A. Referring to FIG.

As shown in FIG. 3, the location checking unit 110 first checks the location of the mobile host 200 according to the location information received from the base station (S301). In step S302, the path setting unit 120 establishes a radio link with an adjacent base station (S303).

Thereafter, the group requesting unit 130 generates and transmits the first multicast group participation request message (IGMP-report) to the adjacent base stations through the established wireless link at the same time (S304). (Radio waves, etc.) are sent (S305).

Then, the base station selection / request unit 140 selects (S306) at least one or more base stations having a good connection state according to a response signal for each neighbor base station, and then sends a second multicast group join request message (IGMP−) to the selected base station. report) is generated and transmitted simultaneously (S307). At this time, the base station selection / request unit 140 confirms the connection state with the neighboring base station according to the state of the radio link established with the neighboring base station.

As such, the apparatus 100 for providing a multicasting service 100 according to an embodiment of the present invention transmits an IGMP-based group participation request message to a base station having a good connection in advance, thereby allowing the selected base stations to prepare multicasting data in advance. Make sure This, in turn, provides the mobile host 200 with a continuous multimedia service.

Thereafter, each selected base station checks whether the service channel requested by the base station selection / request unit 140 is being used by another mobile host in the base station. After registering the mobile host 200 located in the region (A) to the multicast group, and transmits the multimedia casting data provided from the multicasting service providing server 700 to the mobile host 200 (S308).                     

On the other hand, if the checked service channel is not used by another mobile host, each selected base station registers the mobile host 200 in the multicast group, and then sets a path with the mobile host 200 through a switch and a router. . Then, the multimedia casting data is transmitted to the mobile host 200 (S308).

Thereafter, the data selecting / receiving unit 150 selects and receives the multicasting data having the best quality from among the multicasting data received from each selected base station (S309). In this case, the data selecting / receiving unit 150 is selected from the selected base station. After measuring the size of a received synchronization signal or a signal related to system setting, a base station (second base station 410 in the embodiment of the present invention) having an excellent connection state is selected according to the measured result.

Thereafter, the multicasting service provider 160 reproduces the multicasting data received from the second base station 410 through a multimedia player (for example, a window media player or a real player) in the mobile host 200. (S310).

Subsequently, when the mobile host 200 leaves the cell overlap region A, the group release unit 150 releases the set path with the first base station 310 (S311), while the first base station 310 also When the service channel used by the mobile host 200 is used by another mobile host in the first base station 310, the mobile host 200 is released from the multicasting group (S308).

On the other hand, if the service channel used by the mobile host 200 is not used by another mobile host in the first base station 310, the first base station 310 deletes the mobile host 200 from the multicasting group, and then the router Deletes even the route information with (600). It also stops multicasting data transmissions.

As such, the method and apparatus for providing a multicasting service in a wireless Internet network according to an embodiment of the present invention transmit the IGMP-based group participation request message to the base station having a good connection with the mobile host 200 in advance. Allows users to prepare and provide multicasting data in advance. This provides a seamless multimedia service irrelevant to the movement of the location of the mobile host 200.

In addition, the present invention by selecting and receiving the multicasting data having the optimal quality, there is an effect that can provide efficient data management and stable multimedia service when applying the concept of Quality of Service (Quality of Service).

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the claims or in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

A method and apparatus for providing a multicasting service in a wireless Internet network according to the present invention transmit an IGMP-based group participation request message to a base station having a good connection with a mobile host so that each base station prepares multicasting data in advance. Thus, it is possible to provide a seamless multimedia service irrelevant to the mobility of the mobile host.

In addition, the present invention by selecting and receiving the multicasting data having the optimal quality, there is an effect that can provide efficient data management and stable multimedia service when applying the concept of Quality of Service (Quality of Service).

Claims (10)

In the method for providing the multicasting data received from the base station to the mobile host (MOBILE HOST), a) if the mobile host is located in an inter-cell overlapping area, transmitting a first message requesting to join a multicast group to an adjacent base station; b) selecting at least one base station according to the signal magnitude received from the adjacent base station; c) transmitting a second message requesting to join the multicast group to the selected base station; d) selectively receiving the multicasting data received from the selected base station; And e) delivering the selected received multicasting data to a multimedia player in the mobile host. Multicasting service providing method in a wireless Internet network comprising a. The method according to claim 1, f) if the mobile host leaves the inter-cell overlapping area, releasing a setup path with a base station that is in charge of a cell that was located before the movement Multicasting service providing method in a wireless Internet network further comprising. The method of claim 2, g) identifying the current and mobile location of the mobile host according to the location information received from the base station Multicasting service providing method in a wireless Internet network further comprising. The method of claim 3, In step a), Establishing a wireless link between the adjacent base station and the mobile host; And Transmitting the first message to the adjacent base station through the established wireless link; Multicasting service providing method in a wireless Internet network comprising a. The method of claim 3, In step d), Receiving a synchronization signal or a system configuration related signal from the selected base station; Measuring a size of the received signal and selecting a single base station according to the measured result; And Receiving multicasting data from the selected single base station Multicasting service providing method in a wireless Internet network comprising a. 6. The method of claim 5, In step d), Comparing the performance of the selected single base station with the performance of the base station that governs the cell where the mobile host was located prior to the movement; And If the performance of the two base stations differs by a certain level or more, receiving multicasting data from the selected single base station Multicasting service providing method in a wireless Internet network further comprising. An apparatus for providing a multicasting data received from a base station to a mobile host (MOBILE HOST), A positioning unit to check the location of the mobile host according to the location information received from the base station; A path setting unit configured to set a radio path between an adjacent base station and the mobile host when the mobile host is located in an overlapping region between cells; A group request unit which transmits a first message for requesting participation in a multicast group to an adjacent base station through the set radio path; A base station selection / request unit for selecting at least one base station according to a signal size received from the adjacent base station, and then transmitting a second message for requesting participation in a multicast group to the selected base station; A data selection / reception unit for selectively receiving multicasting data received from the selected base station; And Multicasting service provider for transmitting the selected received multicasting data to the multimedia player in the mobile host Apparatus for providing a multicasting service in a wireless Internet network comprising a. 8. The method of claim 7, If the mobile host is out of the inter-cell overlapping area, the group release unit for releasing the setting path with the base station that manages the cell that was located before the movement Multicasting service providing apparatus in a wireless Internet network further comprising. The method of claim 8, The data selecting / receiving unit is After measuring the size of the synchronization signal or system configuration-related signal received from the selected base station, the multi-casting service providing apparatus in a wireless Internet network, characterized in that for receiving the multicasting data from a single base station according to the measurement result . In a computer-readable recording medium recorded with a program for performing a method for providing a multicasting data received from a base station to a mobile host (MOBILE HOST), a) when the mobile host is located in an inter-cell overlapping area, transmitting a first message requesting to join a multicast group to an adjacent base station; b) selecting at least one base station according to the signal size received from the adjacent base station; c) transmitting a second message requesting participation in a multicast group to the selected base station; d) selectively receiving multicasting data received from the selected base station; And e) a function of delivering the selected received multicasting data to a multimedia player in the mobile host. A computer-readable recording medium having a program recorded thereon.

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