KR100862615B1 - Apparatus and Method for Automatic DMB Channel Transition in Multiple Frequency Network based on DMB - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an automatic DM channel switching device and method thereof in a DM MB multi-frequency network.

2. The technical problem to be solved by the invention

The present invention, in switching the DMB channel in accordance with the movement of the DMB receiving terminal having a mobile communication module, by performing the DMB channel switching by determining the necessity of switching the DMB channel whenever a handoff between the mobile communication base station occurs, It is an object of the present invention to provide an automatic DMB channel switching device and method in a DMB multi-frequency network that can switch DMB channels automatically and quickly without interruption and thereby provide a seamless DMB service. .

3. Summary of Solution to Invention

The present invention provides a DMB channel switching apparatus for channel switching in a DMB multi-frequency network, comprising: handoff detecting means for detecting a handoff between mobile communication base stations according to movement of a DMB receiving terminal having a mobile communication module; And channel switching means for performing channel switching by determining a necessity of switching the DMB channel due to entry into a new mobile communication base station area when the handoff is detected through the handoff detecting means.

4. Important uses of the invention

The present invention is used for DMB channel switching in DMB multi-frequency network.

DMB, CDMA, Multi-Frequency Network, MFN, DMB Channel Area, CDMA Cell, Handoff, DMB Channel, Channel Switching, Service ID

Description

Apparatus and Method for Automatic DMB Channel Transition in Multiple Frequency Network based on DMB}

The present invention relates to an automatic DMB channel switching device and method thereof in a DMM multi-frequency network, and more particularly, in switching between DMB channels according to the movement of a DMB receiving terminal having a mobile communication module. The present invention relates to an automatic DMB channel switching device in a DMB multi-frequency network and a method for determining a need for DMB channel switching whenever an off occurs.

The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. [Task Management Number: 2005-S-403-02, Title: Intelligent Integrated Information Broadcasting )Technology].

1 is a diagram illustrating a manual DMB channel switching method in a conventional DMB multi-frequency network.

Digital Multimedia Broadcasting (DMB) such as Terrestrial Digital Multimedia Broadcasting (T-DMB), Digital Video Broadcasting-Handheld (DVB-H), Forward Link Only (FLO), Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) ) Uses a multiple frequency network (MFN). Here, the multi-frequency network (MFN) refers to a network that allocates different operation channels by dividing the whole country by coverage.

In such a DMB multi-frequency network, when the DMB receiving terminal moves from the current region to the new region according to the user's movement, channel switching should be performed to channels in adjacent regions in order to provide continuous continuous service.

In the prior art related to the channel switching method as described above, there is a manual channel switching method as shown in FIG. 1. In FIG. 1, hexagonal cells 101 and 102 represent coverage of one DMB channel.

When the user having the DMB receiving terminal 10 moves from the A region (DMB channel 1 region, "101") to the B region (DMB channel 2 region, "102"), the broadcast channel of the A region 101 (ch If the reception power of the DMB receiving terminal 10 is low because the reception power of # 1) is low, the user should recognize this and manually change to the channel ch # 2 of the B region 102. That is, if the reception state worsens as the user moves to the new service area, the user must manually change the channel to the corresponding channel of the new area.

In the conventional manual channel switching method as described above, whenever the DMB receiving terminal crosses the regional area, the user has to manually change the channel according to the reception state, and the service is smoothly performed until the channel switching is performed. There is a problem that it is not provided, and to solve this problem is a problem of the present invention.

The present invention has been proposed to solve the above problem, and in switching the DMB channel according to the movement of the DMB receiving terminal having the mobile communication module, determining the necessity of switching the DMB channel whenever a handoff occurs between mobile communication base stations. It is characterized by automatically performing DMB channel switching.

More specifically, the present invention, in the DMB channel switching device for channel switching in the DMB multi-frequency network, a handoff for detecting a handoff between mobile communication base station according to the movement of the DMB receiving terminal having a mobile communication module Sensing means; And a channel switching means for performing channel switching by determining the necessity of switching the DMB channel due to entry into a new mobile communication base station area when the handoff is detected through the handoff detecting means.

The present invention also provides a method for switching a DMB channel in a DMB multi-frequency network, the method comprising: a handoff sensing step of detecting a handoff between mobile communication base stations according to movement of a DMB receiving terminal having a mobile communication module; And each time the handoff is detected, determining a necessity of switching the DMB channel according to entry into a new mobile communication base station region and performing channel switching.

As described above, in the multi-frequency network (MFN) environment, when a bidirectional DMB terminal moves from the current DMB region to another DMB region, the user uses a mobile communication (CDMA, GSM, WiBro, etc.) handoff algorithm. This has the effect of automatically switching the channel currently being received.

That is, the present invention, by automatically switching the DMB channel, can eliminate the inconvenience that the user must perform channel switching in accordance with the move to the new DMB zone (that is, DMB can be quickly / easily without user intervention) Channel can be automatically switched), and also through this, it is possible to provide the best and seamless DMB service to the user.

In addition, the present invention, in performing the automatic channel switching in the DMB multi-frequency network (MFN) environment, a lot of calculation process is required by using the result of performing the handoff in the existing mobile communication (CDMA, GSM, WiBro, etc.) system It is very good in terms of power efficiency, and the superiority of this power efficiency is more valuable in the power-sensitive mobile terminal, and the automatic channel switching function can be realized through the minimum change in the existing DMB receiving terminal. It has an effect. That is, the present invention has an effect that the automatic channel switching function can be easily implemented at low cost even in the existing DMB receiving terminal.

First, the specific content of the present invention as a whole, as follows.

In the present invention, in recognizing that the T-DMB, DVB-H, FLO, ISDB-T-based DMB receiving terminal has moved to a new adjacent DMB zone, in a mobile communication system such as CDMA, GSM, WiBro, etc. It uses a handoff algorithm provided by the base station, and targets DMB broadcasting service using MFN, and also targets a bidirectional communication mode using MA, GSM, WiBro, etc. as a return channel.

That is, in a DMB receiving terminal equipped with a mobile communication module (CDMA, GSM, WiBro, etc.), when a handoff between mobile communication base stations is determined, a new base station to be handed off can be known. You can determine whether it is a new DMB zone or not.

At this time, since it is not possible to determine the new DMB region using only base station information, the DMB receiving terminal must have 'DMB channel information for each base station' in advance. If it is determined that the mobile station is moved to a new region and the change of the DMB channel is necessary, the DMB receiving terminal switches the channel to the corresponding DMB channel, and the same specific service as the service previously provided by the user in the switched DMB channel. To change automatically.

In short, the present invention relates to automatic channel switching in a DMB (T-DMB, DVB-H, FLO, ISDB-T, etc.) system, and in particular, in a multi-frequency network (MFN) environment, a DMB receiving terminal moves to another region. In this case, the present invention relates to a mechanism for automatically switching a user's current DMB channel to another DMB channel using a mobile communication (CDMA, GSM, WiBro, etc.) handoff algorithm.

That is, when the DMB receiving terminal moves to a new DMB region, the present invention detects that the DMB receiving terminal has moved to a new DMB region, and determines that a channel change is necessary through the terminal to switch to a new channel. It is characterized by.

In addition, the present invention, in the case of DMB broadcasting that provides a plurality of services through one DMB channel, when the DMB receiving terminal performs channel switching to the adjacent DMB channel, the specific service (video / Audio / data services, etc.) can be provided as it is, so that the user can reselect specific services previously provided.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the CDMA system of the mobile communication system will be described as an example.

2 is a diagram illustrating an embodiment of an automatic DMB channel switching method in a DMV multi-frequency network according to the present invention.

The CDMA base station (mobile communication base station) is deployed according to cell planning for optimizing base station deployment. On the other hand, DMB broadcasting is difficult to form a single frequency network (SFN) because it is serviced in a radio environment where existing analog TV channels exist. Therefore, in DMB broadcasting, the whole country is divided into regional areas (capital area, Chungcheongnam-do / bukdo, Jeollanam-do / bukdo, Gangwon-do, Jeju-do, etc.) and composed of multi-frequency networks (MFN) using different channels for each area.

2 shows overlapping regions of the CDMA network and the DMB network. Typically, the channel areas 210 and 220 of the DMB are much wider than the cell areas 211 and 221 of the CDMA base station. That is, the channel regions 210 and 220 covered by one DMB transmitter 21 and 22 include cell regions 211 and 221 of a plurality of CDMA base stations.

The present invention focuses on this relationship (the relationship between the DMB channel region and the CDMA cell) and utilizes the corresponding DMB channel region for each CDMA base station. After pre-measuring 'broadcast coverage per DMB channel' for each CDMA base station, this information is configured into a table (DMB channel allocation table for each CDMA base station) 201 (see FIG. 6) to configure the DMB receiving terminal 20 or a specific server (FIG. 2, not shown). When the DMB channel assignment table 201 is queried, it is possible to know which DMB channel region a specific base station belongs to. Referring to the example illustrated in FIG. 2, CDMA base stations 1, 2, 3, and 4 belong to the DMB channel 1 region 210, and CDMA base stations 11, 12, 13, and 14 are included in the DMB channel 2 region 220. You can see that it belongs.

In the present invention, in recognizing that the DMB receiving terminal 20 has moved to a new neighboring area 220, a handoff algorithm between CDMA base stations having a return channel is used. Here, the handoff between CDMA base stations refers to a procedure in which the mobile terminal leaves the current cell coverage and enters a new cell region and is assigned a new channel through a new base station, thereby maintaining continuity of a call. The mobile terminal determines a base station (target base station) to hand off by using a previously registered neighbor cell list and a handoff threshold, and handoffs to the determined base station. That is, as the mobile terminal moves, if the current pilot received signal strength is smaller than the pilot received signal strength of the neighboring base station, the neighboring base station is selected as the base station to be handed off according to the handoff algorithm.

When the mobile terminal is requested to perform handoff (triggering), the mobile terminal performs a handoff procedure through a communication protocol with a base station (target base station) to be handed off.

When performing handoff between CDMA base stations, handoff is triggered and a new base station to be handed off is determined, so the present invention uses these two pieces of information (handoff triggering information, base station information). Here, the handoff triggering information is used to notify the handoff of the handoff to the DMB application software of the DMB receiving terminal. The base station information is base station information (target base station information) to be newly handed off, and is used to determine whether the DMB channel mapped to the new target base station is different from the current DMB channel.

That is, the DMB application software inquires in advance 'DMB channel allocation table for each CDMA base station' (201 in FIG. 2), and checks whether the DMB area mapped to the base station to which the DMB receiving terminal is newly moved is the same as the previous DMB area. Check whether or not. As a result of checking whether the DMB zones are the same, if the DMB zones are the same, DMB channel switching is not performed. If the DMB zones are different, the DMB zone is switched to a new DMB channel defined in the DMB channel allocation table for each CDMA base station.

Referring to Figure 2, it will be described in detail as follows.

When the DMB receiving terminal moves from the CDMA base station 3 region (DMB channel 1 region) to the CDMA base station 11 region (DMB channel 2 region), if a handoff trigger occurs in the CDMA module (mobile communication module) within the DMB receiving terminal, The DMB application software in the received DMB receiving terminal queries the previously stored 'CDMA base station specific DMB channel assignment table 201'.

As a result of the inquiry, the DMB application software switches to DMB channel 2 (#ch 2) because the new DMB region is a DMB channel 2 region 220 that is different from the previous DMB region (DMB channel 1 region) 210.

On the other hand, when a plurality of services (video service, audio service, data service) is provided through one DMB channel when switching DMB channels, service identification information (ID) is required to distinguish them. It will be described in detail.

FIG. 3 is a flowchart illustrating an automatic DMB channel switching method in a DMB multi-frequency network according to the present invention, and shows an automatic channel switching algorithm installed in DMB application software in a DMB receiving terminal.

The automatic channel switching algorithm according to the present invention is triggered and performed once whenever a handoff between CDMA base stations occurs.

When the DMB receiving terminal operates in an idle state (Idle) or a busy state (call state) in the same CDMA base station area (300) and moves to an adjacent base station area, handoff between CDMA base stations occurs.

If handoff is determined at CDMA module layer 3 of the DMB receiving terminal (302), a handoff procedure for changing the CDMA base station is started. The CDMA module layer 3 notifies the DMB application software at the application layer 304 that the CDMA base station is to be changed (handoff) and the new CDMA base station information to be handed off (304).

The DMB application software that receives the notification of the change of the base station (handoff) and the new base station information is adjacent to the DMB channel allocation table for each CDMA base station (see FIG. 6) and the service ID switching table for each DMB channel (see FIG. 7). The DMB channel information is inquired (306). Here, the DMB channel allocation table for each CDMA base station and the service ID switching table for each DMB channel may be previously stored in the DMB receiving terminal or may be received by requesting to be stored in a separate specific server.

As a result of the inquiry, if there is no need to switch the DMB channel, the existing operation state is maintained without changing the channel, and if there is a need to switch the DMB channel, the DMB application software performs channel switching to the DMB channel allocated to the new CDMA base station area. (310).

That is, by comparing the DMB channel allocated to the new CDMA base station area with the previous DMB channel, if the DMB channel is the same, there is no need to switch the DMB channel, and only if the existing service can be maintained if the DMB channel is different from each other. Channel switching is performed (310). Here, the same DMB channels mean that the DMB receiving terminals are in the same DMB area, and that different DMB channels mean that they have entered different DMB areas.

In addition, whether the existing service can be maintained can be confirmed through the 'service ID conversion table for each DMB channel', and finally the necessity of channel switching is determined based on the result of the confirmation. In other words, if the user has a service ID corresponding to the service ID that was previously being serviced (that is, the service can be maintained) by acquiring the inquired neighbor channel and the service ID mapped to the channel, the service ID is performed. If there is no corresponding service ID for performing the change and providing the same service, the automatic channel switching may be performed and the service may be switched to a preset service in the switched channel. In addition, according to an embodiment, when there is no corresponding service ID (if an existing service cannot be maintained), channel switching may be automatically abandoned or the user may be informed to select another service.

Figure 4 is a configuration diagram of a DM receiver terminal for automatic DM channel switching in the DM multi-frequency network according to the present invention.

As shown in FIG. 4, the DMB receiving terminal includes a lower transmission layer 40 and an application layer 41. In order for the DMB receiving terminal to support a return channel, the DMB communication module 401 and the CDMA module 402 are simultaneously mounted in the lower transport layer 40. Here, the DMB communication module 401 is a module for receiving and processing a DMB broadcast signal, and the CDMA module 402 is a kind of mobile communication module and performs general mobile communication functions including handoff.

On the other hand, the DMB application software 411 is 'DMB channel switching software' to automatically switch the DMB channel according to the user's movement in the DMB multi-frequency network. The DMB application software 411 may store a table (see FIGS. 6 and 7) for switching DMB channels in its own memory 412 (depending on the embodiment, it may be provided and used from a specific server). ). This table includes a DMB channel allocation table for each CDMA base station of FIG. 6 and a service ID switching table for each DMB channel of FIG.

In short, the DMB application software 411 in FIG. 4 is a functional block for automatically switching the DMB channel, and the memory 412 stores table information used to determine the necessity of switching the DMB channel. It corresponds to the automatic DMB channel switching device 50 of FIG.

The DMB channel switching process in the DMB receiving terminal will be described in detail as follows. Layer 3 (403) in CDMA module 402 performs handoff between CDMA base stations, and each time a handoff is determined, triggering information and new base station information (target base station information) to be handed off to DMB application software 411. Notify. Then, the DMB application software 411 determines whether it is necessary to switch the DMB channel using the 'CDMA base station-specific DMB channel allocation table' and the 'DMB channel-specific service ID switching table' stored in the memory 412. Channel switching is performed according to the determination result.

FIG. 5 is a configuration diagram of an automatic DMB channel switching device according to an exemplary embodiment of the present invention, showing a detailed configuration of the DMB application software 411 and the memory 412 of FIG.

The automatic DMB channel switching device 50 according to the present invention switches the DMB channel as it enters a new mobile communication base station area by using 'DMB channel allocation information for each mobile communication base station' whenever a handoff occurs between mobile communication base stations. It is determined whether there is a need to perform the DMB channel switching, as shown in Figure 5, comprising a handoff detection unit 51, channel switching unit 52, and memory 53, respectively Referring to the components of the following.

The handoff detector 51 detects a handoff between CDMA base stations performed by the CDMA module 402 according to the movement of the user (that is, the movement of the DMB receiving terminal). More specifically, the handoff detector 51 detects the handoff by receiving a handoff notification and base station information to be handed off from the CDMA module of the DMB receiving terminal.

Whenever the handoff is detected through the handoff detector 51, the channel switcher 52 uses the DMB channel allocation table for each CDMA base station and the service ID for each DMB channel stored in the memory 53. The necessity of channel switching is determined, and channel switching is performed according to the determination result.

6 is a diagram illustrating an embodiment of a DMB channel allocation table for each CDMA base station according to the present invention.

According to the present invention, a method for allocating an optimal DMB channel for each CDMA base station measures a broadcast coverage for each DMB channel for each CDMA base station, and selects a DMB channel having an optimal measured value as the DMB channel for the corresponding CDMA base station. To allocate.

As described above, if the optimal DMB channel allocated to each CDMA base station is prepared in one table, it is as shown in FIG. That is, the DMB channel allocation table for each DMA base station is a table indicating a mapping relationship between the CDMA base station area and the DMB channel region.

The DMB channel assignment table generated as described above may be generated in advance and stored in the internal memory of the DMB receiving terminal. Meanwhile, in another embodiment, the DMB channel allocation table may be stored in a specific server (external server) on the network. In this case, the DMB channel allocation table may be dynamically transmitted to the DMB receiving terminal according to the request of the DMB receiving terminal. use.

Referring to the channel allocation table of FIG. 6, it can be seen that the same DMB channel 8 is allocated to CDMA base stations 1 and 2 (61). This means that CDMA base stations 1 and 2 belong to the same DMB channel region.

On the other hand, CDMA base stations 3 and 4 are also assigned the same DMB channel 10 (62) and belong to the same DMB channel region.

7 is a configuration diagram of an embodiment of a service ID conversion table for each DMB channel according to the present invention.

In DMB broadcasting, a plurality of services (audio service, video service, and data service) are provided through one DMB channel, so that the same service can be distinguished in order to maintain the same service before and after switching DMB channels. (Identifier) is required. Therefore, the present invention uses the 'service ID'.

In other words, when automatically switching the DMB channel according to the present invention, while selecting the adjacent DMB channel, the same service used by the user in the previous DMB channel should be selected. That is, since the service ID may be the same or different for each DMB channel, in order to maintain the same service, a "service ID switching table for each DMB channel" is required. Here, the 'service ID conversion table for each DMB channel' is a kind of 'channel-specific service information' provided to enable the same service to be provided before / after channel switching. The current DMB channel and the adjacent DMB channel (handoff Service ID correspondence for providing the same service among channels allocated to a new base station area.

Referring to FIG. 7, when the DMB receiving terminal receiving a service corresponding to service ID # 2 through the current DMB channel 8 performs channel switching to the adjacent DMB channel 10, the same service may be maintained. Service ID # 3 of DMB channel 10 should be selected.

As described above, the service ID conversion table for each DMB channel is stored in the memory of the DMB receiving terminal in advance, or stored in a specific server external to the network, as shown in the DMB channel allocation table for each CDMA base station. And may be provided at the request of the DMB receiving terminal.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily carried out by those skilled in the art will not be described in more detail.

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

1 is a diagram illustrating a manual DMB channel switching method in a conventional DMB multi-frequency network;

2 is a diagram illustrating an embodiment of an automatic DMB channel switching method in a DMV multi-frequency network according to the present invention;

3 is a flowchart illustrating an automatic DMB channel switching method in a DMV multi-frequency network according to the present invention;

4 is a diagram illustrating an embodiment of a DMX receiving terminal for automatic DMB channel switching in a DMX multi-frequency network according to the present invention;

5 is a configuration diagram of an embodiment of an automatic DMB channel switching device according to the present invention;

6 is a diagram illustrating an embodiment of a DMB channel allocation table for each CDMA base station according to the present invention;

7 is a configuration diagram of an embodiment of a service ID conversion table for each DMB channel according to the present invention.

* Explanation of symbols on the main parts of the drawing

101, 102, 210, 220: DMB channel region 211, 221: CDMA base station cell

401: DMB communication module 402: CDMA module

411: DMB application software (automatic DMB channel switching software)

50: automatic DMB channel switching device 51: handoff detection unit

52: channel switching section 412, 53: memory

Claims (15)

In the DMB channel switching device for channel switching in a DMB multi-frequency network, Handoff detecting means for detecting a handoff between mobile communication base stations according to movement of a DMB receiving terminal having a mobile communication module; And When the handoff is detected through the handoff detecting means, the channel switching means for determining the necessity of switching the DMB channel due to entry into the new mobile communication base station area and performing channel switching Automatic DMB channel switching device comprising a. The method of claim 1, The handoff detection means, Automatic DMB channel switching device characterized in that for detecting the handoff by receiving the handoff notification and the base station information to be handoff from the mobile communication module of the DMB receiving terminal. The method according to claim 1 or 2, The channel switching means, The DMB channel allocated to the current mobile communication base station is compared with the DMB channel allocated to the new mobile communication base station through the DMB channel allocation information for each mobile communication base station. As the DMB channel is different, the channel is the DMB channel for the new mobile communication base station. Automatic DMB channel switching device characterized in that the switching. The method of claim 3, wherein The DMB channel allocation information for each mobile communication base station is An automatic DMB channel switching device comprising a DMB channel allocation table for measuring broadcasting coverage for each DMB channel for each mobile communication base station and allocating a DMB channel having an optimal measurement value as a DMB channel for the corresponding mobile communication base station. The method of claim 3, wherein The DMB channel allocation information for each mobile communication base station is Automatic DMB channel switching device characterized in that the storage is provided in the storage means or an external server of the DMB receiving terminal. The method of claim 3, wherein The channel switching means, In the case of DMB broadcasting which provides a plurality of services through one DMB channel, a function of changing service identification information (ID) using service information for each channel is provided so that the same service can be provided before and after channel switching. Automatic DMB channel switching device characterized in that it further performs. The method of claim 6, The service information for each channel, An automatic DMB channel switching device, characterized in that it is a service ID conversion table for each channel indicating a service identification information (ID) correspondence relationship for providing the same service between a current DMB channel and an adjacent DMB channel. The method of claim 6, The service information for each channel, Automatic DMB channel switching device characterized in that the storage is provided in the internal storage means or an external server of the DMB receiving terminal. The method of claim 7, wherein The channel switching means, If the corresponding service identification information (ID) that can provide the same service is not in the service ID conversion table for each channel, the automatic DMB channel is characterized in that it provides a preset service or informs the user to select another service. Switching device. In the DMB channel switching method in a DMB multi-frequency network, A handoff detection step of detecting a handoff between mobile communication base stations according to movement of a DMB receiving terminal having a mobile communication module; And Whenever the handoff is detected, a channel switching step of determining a necessity of switching the DMB channel according to entry into a new mobile communication base station area and performing channel switching Automatic DMB channel switching method comprising a. The method of claim 10, The handoff detection step, Method for automatic DMB channel switching characterized in receiving the handoff notification and the base station information to be handoff from the mobile communication module of the DMB receiving terminal to detect the handoff. The method of claim 10 or 11, The channel switching step, Comparing the DMB channel currently allocated to the mobile communication base station with the DMB channel allocated to the new mobile communication base station through the DMB channel allocation information for each mobile communication base station; And Performing channel switching to a DMB channel for the new mobile communication base station as a result of the channel comparison; Automatic DMB channel switching method comprising a. The method of claim 12, The DMB channel allocation information for each mobile communication base station is Automatic DMB channel switching method characterized in that the storage is provided in the storage means or an external server of the DMB receiving terminal. The method of claim 12, In the case of DMB broadcasting providing a plurality of services through one DMB channel, changing service identification information (ID) by using service information for each channel so that the same service can be provided before and after channel switching. Automatic DMB channel switching method further comprising. The method of claim 14, The service information for each channel, Automatic DMB channel switching method characterized in that the storage is provided in the storage means or an external server of the DMB receiving terminal.

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