KR20060112578A - System and method for providing broadcasting service in a broadband wireless access communication system - Google Patents

Abstract

A system and method for providing a broadcasting service in a broadband wireless access communication system are provided to facilitate allocation of an identifier for contents broadcast and expand the number of limited multicast connection identifiers. A mobile station(400) searches and detects a list of broadcasting services broadcast from an MBS(Multicast and Broadcast Service) server(402). The mobile station(400) transmits a DSA_REQ(Dynamic Service Addition_REQuest) message to a base station(450) in order to request MBS connection setup(411). The base station(450) transmits a DSX-RVD(Dynamic Service X-ReceiVeD) from the mobile station(400)(413). The base station(450) transmits a DSA_RSP message as a response to the broadcast connection request to the mobile station(400)(415). The mobile station(400) transmits a DSA_ACK message to the base station(450)(417).

Description

SYSTEM AND METHOD FOR PROVIDING BROADCAST SERVICE IN BROADBAND WIRELESS COMMUNICATION SYSTEM {SYSTEM AND METHOD FOR PROVIDING BROADCASTING SERVICE IN A BROADBAND WIRELESS ACCESS COMMUNICATION SYSTEM}

1 is a diagram schematically illustrating a structure of an MBS system in a general broadband wireless access communication system;

2 is a signal flow diagram illustrating a broadcast service connection procedure in a conventional broadband wireless access communication system.

FIG. 3 schematically illustrates a downlink frame structure including MBS region information in a general broadband wireless access communication system.

4 is a signal flow diagram illustrating a broadcast service connection procedure in a broadband wireless access communication system according to an embodiment of the present invention.

 5 is a flowchart illustrating a process in which a mobile station performs broadcast service connection establishment according to an embodiment of the present invention.

6 is a flowchart illustrating a process of performing a broadcast service connection setup by a base station according to an embodiment of the present invention.

The present invention relates to a broadcast service in a broadband wireless access communication system, and more particularly to a system and method for providing a broadcast service to a plurality of mobile stations.

In the 4th Generation communication system, which is the next generation communication system, active research is being conducted to provide users with services having various quality of service (hereinafter referred to as 'QoS') having a transmission rate of about 100 Mbps. It is becoming. Currently, 3rd generation communication systems generally support transmission rates of about 384 Kbps in outdoor channel environments with relatively poor channel environments, and up to 2 Mbps in indoor channel environments with relatively good channel environments. .

The fourth generation communication system is a broadband wireless access communication system, and the broadband wireless access communication system is developing into multimedia communication and multimedia broadcasting / communication capable of transmitting multimedia services. Accordingly, in order to support the multimedia broadcast / communication, the base station multicasts and broadcasts one or multiple multimedia data sources to a plurality of mobile stations. As described above, a multicast and broadcast service for providing a broadcast in a broadband wireless access communication system is referred to as a multicast and broadcast service (MBS). In other words, the MBS may have the same meaning as a broadcast service.

The MBS supports multimedia transmission forms such as real-time video, audio, still images, text, and the like, and is a service capable of simultaneously providing audio data and video data depending on the application of the multimedia transmission format. In addition, since there may be multiple mobile stations for the same service, the MBS may be serviced through a broadcast channel.

1 is a diagram schematically illustrating a structure of an MBS system in a general broadband wireless access communication system.

Referring to FIG. 1, first, at least one or more cells may be included in one logical group for division of a broadcast service area according to its local location. This logical group is called an MBS zone. That is, the cells 101, 103, 105, 107, 109, and 111 constitute one MBS zone, the identifier for identifying the MBS zone has a '1', and the cells 131, 133, 135, 137, 139, 141, and 143 constitute another MBS zone and have an MBS zone identifier '2'.

The base stations included in each MBS zone multicast or broadcast the same broadcast to mobile stations using the same time and frequency band, and the mobile stations in each MBS zone receive the same broadcast. Meanwhile, a server that manages the MBS zones, that is, an MBS server (not shown) exists in each MBS zone to manage a broadcast service list.

For example, in order for the mobile station 170 to receive an arbitrary broadcast service, that is, a first broadcast service, in a cell 109 having MBS zone identifier 1 for the first time, the base station 109 of the cell configures an MBS connection for the first broadcast service. Should be performed. The MBS connection setting is used to transmit and receive a dynamic service addition_request (hereinafter referred to as "DSA_REQ") and a DSA_response (DSA_ReSPonse, hereinafter referred to as "DSA_RSP") to the base station 109. When the MBS connection is completed for the first broadcast service and the mobile station moves to other base stations in the MBS zone, the MBS connection may be re-configured for the first broadcast service that has completed the connection. This is because broadcast services provided in the same MBS zone have the same Connection IDentifier (hereinafter, referred to as 'CID') and the same frame structure in the same MBS zone.

On the other hand, it is assumed that the mobile station 170 moves from the current cell 109 to another cell 133 having a different MBS zone identifier. The CID of the first broadcast service provided in common in the region having MBS zone identifier 1 and the region having MBS zone identifier 2 has a different value in each MBS zone. In addition, the frame structure in each MBS zone is also different. Therefore, when the mobile station 170 moves to another cell having a different value from the current MBS zone identifier, the mobile station 170 performs MBS connection setup again.

Here, the MBS connection setting should be made as many as the number of broadcast services to be provided by the mobile station 170. In other words, after the mobile station 170 completes the connection setup for the first broadcast service, the mobile station 170 must perform connection setup for the second broadcast service again in order to receive the second broadcast service.

Meanwhile, the broadcast service types can be classified as follows from the perspective of the MBS zone.

Multiple base station broadcast service: A broadcast service type that is performed at the MBS zone level composed of a plurality of base stations. In this case, in the broadcast service in the MBS zone, the same broadcast message is located / transmitted in the same area in the frequency and time domains in downlink frames transmitted by all base stations in the MBS zone, and each broadcast service, that is, multicast used for MBS connection The same value is assigned to the CID (Multicast CID). That is, all of the base stations in the MBS zone provides the same broadcast service in the same form. For example, the CID B allocated to the broadcast service A transmitted by multicast from the first base station exists in the second base station of the same MBS zone, and the CID assigned to the broadcast service is It is the same as CID (B) used in the first base station.

Also, in order to transmit actual data of the broadcast service A, the MBS region in the downlink frame also has the same position, the same size, and the same time zone in the downlink frame region of all base stations (this is to obtain the physical macro diversity effect of the signal). Is).

Single base station broadcast service: Unlike the multi-base station broadcast service, a single base station broadcast service means a broadcast service valid only within one base station. This means a broadcast service provided in the form of a hot spot in one base station. In this case, unlike the multi-base station broadcast service, one CID allocated to the broadcast service is allocated within a transport CID range managed by one base station. The Transport CID used here will be described below. Unlike the Multicast CID of the multi-base station broadcast service, the Transport CID is unique only within the base station.

The CIDs used for the MBS connection are shown in Table 1 below.

The use and function of each CID shown in Table 1 are as follows.

Initial Ranging CID: This is a connection identifier for a ranging request (RNG-REQ) message transmitted by the mobile station to the base station in order to be assigned a primary CID and a basic CID. All mobile stations must know the initial ranging CID value (0x0000). The mobile station informs the base station of its medium access control (MAC) address using a ranging request (RNG-REQ) message during the negotiation process with the base station. Accordingly, the base station maps the MAC address of the mobile station to a CID indicating the mobile station, that is, Primary Management CID and Basic CID.

Primary Management CID: This is a connection identifier used for MAC management message processing to be performed essentially between a mobile station and a base station, and is used to distinguish mobile stations. As shown in Table 1, one base station can manage and distinguish m mobile stations. The Primary Management CID is a CID recognized by the mobile station by receiving a ranging response (RNG-RSP) message.

Basic CID: A CID used to process a MAC Management message to be selectively performed between a mobile station and a base station. The Basic CID is also used to distinguish mobile stations. As shown in Table 1, the Basic CID has the same number of m CIDs as the Primary Management CID. The Basic CID, like the Primary Management CID, is a CID that is recognized by the mobile station by receiving a ranging response (RNG-RSP) message.

Broadcast CID: CID of messages that all mobile stations should receive and process. All mobile stations have a CID (0xFFFF) value previously known.

-Multicast Polling CIDs: CIDs allocated or released by the Multicast Polling Assignment Request (MCA-REQ) message, and used in the Multicast Polling Service, total of 251.

-Transport CIDs, Secondary Management CIDs: Transport CIDs are CIDs used for sending and receiving general data traffic, and are included in BS-Initiated DSA-REQ messages and DSA-RSP messages, which are the base station responses to MS-Initiatted DSA-REQ messages. Is the CID. The Secondary Managment CID means a CID for Management Connection for a higher layer such as SNMP / TFTP, and is included in a Registration Response (REG-RSP) message and assigned to a mobile station. Transport CID and Secondary Managment CID have the number of CIDs in the range of 2m + 1 ~ 0xFE9F.

AAS initial ranging CID: This is a CID required for initial ranging in an adaptive antenna system.

Normal mode multicast CID: This is a CID indicating that only mobile stations that are normally operating after completing network registration with the base station that are not in sleep mode or idle mode should receive and process. All mobile stations already have a CID (0xFFFB) value known in advance.

-Sleep mode multicast CID: CID means a multicast message to be processed only by mobile stations in the sleep mode, and has a CID (0xFFFC) value that all mobile stations already know.

-Idle mode multicast CID: A CID means a multicast message to be processed only by mobile stations in idle mode, and has a CID (0xFFFD) value already known to the mobile stations.

Padding CID: CID indicating a dummy message sent to an unallocated area (burst) in an up / down frame, and having a CID (0xFFFE) value already known to all mobile stations.

Multicast CIDs: CIDs used to send broadcast messages in multicast. That is, the identifier used by the mobile station to distinguish the MBS connection with the base station from other connections. Each broadcast service provided in the same MBS zone has the same Multicast CID. For example, if one base station A in one MBS zone allocates and uses 0xFFA0 as a multicast CID for an arbitrary MBS broadcast, another base station in the same MBS zone also uses a multicast CID for the MBS broadcast as 0xFFA0. It must be allocated and used. In this case, the total number of the multicast CIDs is 95.

As can be seen from the description of Table 1, the CID has a 16-bit size, and is generally used in a header of a MAC frame, which may be used to distinguish a connection, as in the case of a connection identifier described in the traffic indication message below. Also used for.

2 is a signal flow diagram illustrating a broadcast service connection procedure in a conventional broadband wireless access communication system.

Referring to FIG. 2, first, the mobile station 200 searches for and detects a broadcast service list broadcast from the MBS server 280 in order to know a broadcast service that can be received through the base station 250 (step 202). The broadcast service list includes information for allowing the mobile station 200 to receive a broadcast service.

The mobile station 200 transmits a DSA_REQ message to the base station 250 to establish an MBS connection (step 211). The DSA_REQ message structure is shown in Table 2 below.

Syntax Size Notes DSA-REQ_Message_Format () { Management Message Type = 11 8 bits TBD Transaction ID 16 bits Unique identifier for this transaction assigned by the sender. TLV Encoded Information Variable TLV specific }

In the DSA_REQ message, the Transaction ID field means that a mobile station designates a random value to distinguish these messages when performing a plurality of dynamic service related processes, that is, when transmitting DSx_xxx messages. The TLV (Type / Length / Value) Encoded Information field includes information that can be optionally included as needed. For example, the TKV Encoded Information field may include information on a broadcast service requested by the mobile station 200.

In this case, the mobile station 200 transmits information indicating whether to request an MBS connection or a general service connection to the DSA-REQ message to the base station 250 by including information indicating the TLV Encoded Information field. Table 3 shows the indication information.

As shown in Table 3, the base station 250 receiving the DSA-REQ message having a value of 0 means a general service connection request, not an MBS connection request, and has a value of 1 (single base station broadcast service) or 2 (multiple). The base station 250 receiving the DSA-REQ message, which is a base station broadcast service, recognizes that the mobile station 200 is a connection establishment request for receiving a broadcast service. The DSA-REQ message may be transmitted from the base station 250 to the mobile station 200 to establish a connection. This is a feature of the DSA-REQ message. In other words, for establishing a connection, the mobile station may send a DSA-REQ message to the base station, and the base station may also send a DSA-REQ message to the mobile station. When the base station transmits a DSA-REQ message to the mobile station, the quality of service parameters and the broadcast service identifier for the relevant broadcast service in the form of TLV encoding in the DSA-RSP message will be described in Table 7 below. That is, Multicast CID or Transport CID) is included in the DSA-REQ message transmitted by the base station. Although the base station 250 may request a single base station broadcast service or a multiple base station broadcast service from the mobile station 200, it is assumed herein that the mobile station 200 requests a single base station broadcast service or a multiple base station broadcast service.

Accordingly, the base station 250 transmits a DSX-RVD message to the mobile station 200 (step 213). The DSX-RVD message is a message informing the mobile station 200 that the base station 250 normally receives and processes a DSA related message such as the DSA_REQ message.

Syntax Size Notes DSX-RVD_Message_Format () { Management Message Type = 30 8 bits TBD Transaction ID 16 bits Confirmation Code 8 bits }

In Table 4, the Transaction ID uses the value used in the DSA_REQ message so that the mobile station 200 can recognize that the DSX_RVD message is a response to the DSA_REQ message.

Thereafter, the base station 250 transmits a DSA_RSP message as shown in Table 5 below in response to the broadcast service connection request of the mobile station 200 (step 215).

Syntax Size Notes DSA-RSP_Message_Format () { Management Message Type = 12 8 bits TBD Transaction ID 16 bits Confirmation Code 8 bits TLV Encoded Information Variable TLV specific }

In Table 5, the confirmation code has a structure as shown in Table 6 below and includes response information about the DSA_REQ message.

In Table 6, when the base station 250 transmits an acknowledgment in response to the DSA_REQ message, 0 (allow / success) is used as a confirmation code value of the DSA_RSP message. In this case, quality of service parameters and broadcast service identifiers (ie, multicast CIDs or transport CIDs) for the corresponding broadcast service are included in the DSA_RSP message in a TLV encoding form as shown in Table 7 below. Meanwhile, other code values except for the code value 0 are not directly related to the present invention, and thus description thereof will be omitted.

If the mobile station 200 transmits a DSA_REQ message corresponding to the general connection request, the CID of Table 7 should be a CID for a service corresponding to the general connection request.

Upon receiving the DSA_RSP message, the mobile station 200 transmits a DSA_ACK (DSA_ACK) message as shown in Table 8 to the base station 250 (step 217).

Syntax Size Notes DSA-ACK_Message_Format () { Management Message Type = 13 8 bits TBD Transaction ID 16 bits Confirmation Code 8 bits TLV Encoded Information Variable TLV specific }

The mobile station 200 assigned the CID for one broadcast service until step 217 performs the same steps 219 to 225 or steps 227 to 239 of FIG. 2 in order to be allocated another broadcast service CID.

As described above, in a broadband wireless access communication system, a mobile station transmits one DSA-REQ message to a base station, and the base station knows that only one broadcast service connection is established by transmitting a DSA_RSP message to the mobile station. have. In other words, in order for a mobile station to establish a plurality of broadcast service connections, a plurality of DSA-REQ messages must be transmitted, and the base station receiving the mobile station receives the DSA-RSP message corresponding to each DSA-REQ message transmitted by the mobile station. Transmit to the mobile station.

FIG. 3 is a diagram schematically illustrating a downlink frame structure including MBS region information in a general broadband wireless access communication system.

Referring to FIG. 3, the downlink frame includes a preamble region 301, a downlink map (DL-MAP) region 303, and MBS related regions 305, 307, 309, 311, 313, and 315. It includes. Through the preamble area 301, a synchronization signal for acquiring mutual synchronization between the base station and the mobile station, that is, a preamble sequence, is transmitted. The DL-MAP area 303 is an area in which a DL-MAP message is transmitted, and includes an MBS_MAP information element (hereinafter, referred to as 'IE') 305 when the MBS is provided. The MBS_MAP IE 305 includes information necessary for decoding an MBS region. Table 9 shows the MBS_MAP IE 305 structure.

In Table 9, the MBS Zone identifier is an identifier of the corresponding MBS region, and the OFDMA Symbol Offset represents the start offset of the MBS MAP message in the MBS region. In Table 9, the information after the DIUC change indication indicates the size information of the MBS MAP message in the MBS region and the information necessary for decoding the MBS MAP message.

Meanwhile, the MBS region includes an MBS MAP message 307 including an MBS_Data_IE 309 and regions 311, 313, and 315 to which an MBS data burst is transmitted.

The MBS MAP message 307 includes a location where a mobile station receiving an MBS service receives an MBS data burst and information necessary to decode the data burst. The MBS MAP message structure is shown in Table 10 below.

Syntax Size (bits) Notes MBS-MAP Message format () {   MAC Generic Header 48 6 bytes   Management message type = 62 4   Frame number 4 The frame number is identical to the frame number in the DL-MAP  MBS_DIUC_Change_Count 8  #MBS_DATA_IE 4 Number of included MBS_DATA_IE  For (i = 0; i <n; i ++) { n = #MBS_DATA_IE    MBS_DATA_IE Variable  } #MBS_DATA_Time_Diversity_IE 4 Number of included MBS_DATA_Time_Diversity_IE   For (i = 0; i <m; i ++) { m = #MBS_DATA_Time_Diversity_IE MBS_DATA_Time_Diversity_IE Variable   }   If (! Byte boundary) {    Padding nibble 8  } TLV encoding element }

In Table 10, the MBS MAP message includes a management message type indicating a plurality of IEs, that is, a message type to be transmitted, a frame number, MBS data burst information, and the like, in addition to the 6-byte MAC generic header. The frame number is the same as the frame number of the DL-MAP, and the MBS DIUC Change Count indicates whether the MBS data burst profile is the same as before. When the MBS DIUC Change Count value is changed, the mobile station should receive downlink burst profile information included in the TLV of the MBS MAP message. If the downlink burst profile information is not included in the MBS MAP message, the mobile station may receive the downlink burst profile information by receiving a next DCD message. MBS_DATA_IE and MBS_DATA_Time_Diversity_IE indicate MBS data burst information to be received by the mobile station. That is, MBS_DATA_IE indicates information on the areas 311, 313, and 315 in which the MBS data burst of FIG. 3 is transmitted. The MBS_DATA_Time_Diversity_IE is also similar to the MBS_DATA_IE 309 and includes MBS data burst information in the presence of MBS data for a mobile station supporting a hybrid retransmission (H-ARQ) scheme.

The structure of the MBS_DATA_IE 309 is as shown in Table 11 below.

In Table 11, MBS_DATA_IE is MBS_DATA_IE is a Next MBS MAP change indication field indicating whether the size of the MBS MAP message to appear in the next MBS frame, a Multicast CID field indicating the multicast identifier information corresponding to the IE information; An OFDMA symbol offset and a subchannel offset indicating a start offset of the multicast broadcast service data burst region, and a No. indicating a size of the multicast broadcast service data burst region. OFDMA symbols, No. a subchannels field, a Repetition coding indication field required to decode the multicast broadcast service data burst region, a Next MBS frame offset, a Next MBS OFDMA symbol offset field indicating an offset of an MBS MAP message to be next MBS frame, and the Next When MBS MAP change indication is set to 1, Next MBS No. indicating the size of MBS MAP message to be displayed in the next MBS frame. OFDMA symbols, Next MBS No. Contains an OFDMA subchannels field.

As described above, in the conventional broadband wireless access communication system, the mobile station requests a base station for a broadcast service to be provided. Here, the broadcast service requested by the mobile station means a broadcast serviced by any broadcaster. For example, the mobile station may request broadcast service of broadcaster A or broadcast service of broadcaster B. However, despite the variety of contents (eg, drama, sports, movies, etc.) provided by the broadcaster A or B, the mobile station does not have a specific method for requesting the contents.

In addition, there are 95 multicast CIDs for identifying the broadcast service. If the number of broadcast services exceeds 95, multicast CID allocation for the exceeded broadcast services becomes impossible. In addition, when the multicast CIDs are allocated on a content basis, the number of multicast CIDs is further insufficient, and resource consumption and time delays occur due to the transmission and reception of a plurality of DSA_REQ and DSA_RSP messages. Therefore, there is an urgent need for a method of minimizing resource consumption and time delay while expanding the number of identifiers for broadcasting service and content classification.

The present invention was made to solve the above problems, and an object of the present invention is to provide a system and method for extending the number of broadcast service identifiers in a broadband wireless access communication system.

Another object of the present invention is to provide a system and method for classifying contents in a broadband wireless access communication system.

Another object of the present invention is to provide a broadcast service connection establishment method and system for minimizing resource consumption and time delay in a broadband wireless access communication system.

The first method of the present invention for achieving the above objects; In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a method for establishing a broadcast service connection for a mobile station to receive the MBS, comprising: a specific broadcast service and a specific broadcast service as a base station; Requesting to establish a connection setting of a plurality of content broadcasts provided by the service provider; and receiving a first identifier corresponding to the specific broadcast service and a second identifier corresponding to each of the plurality of content broadcasts from the base station; It is done.

The second method of the present invention for achieving the above objects; In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a method for establishing a broadcast service connection for providing a MBS to a mobile station by a base station, comprising: a specific broadcast service from the mobile station; Receiving a connection establishment request of a plurality of content broadcasts provided by a specific broadcast service, and assigning a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts to the mobile station; It is characterized by including.

The third method of the present invention for achieving the above objects; In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a method of establishing a broadcast service connection for receiving the MBS between a mobile station and a base station, wherein the mobile station transmits a specific broadcast to the base station. Requesting connection establishment of a service and a plurality of content broadcasts provided by the specific broadcast service; and the base station determines a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts. And the mobile station receives the MBS corresponding to the assigned identifiers.

The system of the present invention for achieving the above objects; In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a broadcast service connection establishment system for providing the MBS, comprising: a plurality of broadcast services and a plurality of broadcast services provided by the broadcast service; A mobile station requesting connection establishment of content broadcasts, and receiving a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts, and provided by the specific broadcast service and the specific broadcast service. And a base station configured to receive a connection setting request for a plurality of content broadcasts and to allocate a first identifier corresponding to the specific broadcast service and a second identifier corresponding to each of the plurality of content broadcasts.

The third method of the present invention for achieving the above objects; In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), in a broadcast service connection establishment method for providing the MBS, a base station provides a specific broadcast service and the specific broadcast service. Transmitting a connection establishment request message including a broadcast service identifier TLV to a mobile station for establishing a connection of a plurality of content broadcasts; and transmitting, by the mobile station, a response to the connection establishment request message to the base station; Characterized in that it comprises a.

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

According to the present invention, a mobile station requests a base station to establish a plurality of broadcast service connection settings in a broadband wireless access communication system, and the base station transmits a connection identifier corresponding to each of the plurality of broadcast services to the mobile station. CID 'will be proposed. Here, the broadcast service means a broadcast service provided in units of broadcast stations or a content broadcast service provided by broadcast stations.

That is, the present invention provides a connection request method for a plurality of broadcast services and a CID allocation method for a plurality of broadcast services in a single procedure. In addition, the present invention also proposes a method of extending the number of conventional limited multicast CIDs (hereinafter referred to as 'multicast CID').

To this end, the four embodiments will be described in the present invention.

First embodiment

In the present invention, in order to be able to request a plurality of broadcast services to a base station through one DSA-REQ message, 'multiple broadcast service identifier TLV (Type / Length / Value) encoding' for a broadcast channel identifier is newly defined. The multicast service identifier TLV encoding may include a dynamic service addition request to indicate a plurality of broadcast services requested by the mobile station in the process of requesting a broadcast service connection and receiving a response thereto. REQuest, hereinafter referred to as 'DSA-REQ') in the TLV Encoded Information field of the message. At least one information about broadcast services requested by the mobile station is included in the multicast service identifier TLV encoding.

However, the broadcast service designation method requested by the mobile station can be implemented in various ways depending on the level of the broadcast service or the broadcast service provider. Therefore, since the parameters used in the multicast service identifier TLV encoding are implementation issues, they are not related to the present invention, and thus detailed description thereof will be omitted.

Table 12 below shows a multiple broadcast service identifier TLV encoding format included in the DSA-REQ message.

Type Length Value Scope [145/146] .x Variable Compound DSx-REQ

Parameters indicating the plurality of broadcast services are included in the plurality of broadcast service identifier TLV encodings shown in Table 12.

Type Length Value [145/146] .x.1 4 or 6 IP address MBS Contents Server [145/146] .x.2 2 Port Number of MBS Contents

Table 13 shows an example of parameters used in the multicast service identifier TLV encoding. In order to refer to the broadcast service, an IP address and a port number of a base station providing a broadcast service may be configured in pairs and included in a broadcast service identifier TLV of Table 12. The base station receiving the DSA-REQ message including the broadcast service identifier TLV of Table 12 establishes an MBS connection for each of a plurality of broadcast services requested by the mobile station.

Meanwhile, the present invention newly defines another term 'Logical Channel IDentifier'. The logical channel identifier may be used as an identifier for distinguishing the plurality of contents, or may be extended and used for distinguishing a broadcast service or contents by a combination of the multicast CIDs. For example, the logical channel identifier may be configured in total of 256 (values in the range of 0 to 255), and may be referred to as a dynamic service addition request (hereinafter, referred to as a 'DSA_REQ') message or a DSA_response (DSA_ReSPonse). It will be referred to as 'DSA_RSP' hereinafter). The logical channel identifier may be included in a TLV (Type / Length / Value) Encoded information field of the messages, the format of which is shown in Table 14 below.

If the mobile station transmits the DSA-REQ message including the multicast service identifier TLV to the base station, the base station transmits the plurality of logical channel identifier information in the DSA-RSP message to the mobile station. Here, the range of the logical channel identifier is 256, for example, as shown in Table 14 below, but it may be further extended according to the number of broadcast services provided by the base station.

For example, the mobile station according to the present invention may require one CID assignment or even the assignment of identifiers corresponding to a plurality of contents. That is, the mobile station may only request the CID of the first broadcasting station, that is, the transport CID or the multicast CID allocation, and the allocation of identifiers corresponding to the CID of the first broadcasting station and the A, B, and C contents provided by the broadcasting station. You can even ask.

Accordingly, the base station may transmit only the Transport CID or the Multicast CID to the mobile station in the DSA_RSP message, and include the Multicast CID and the logical channel identifier corresponding to the A, B, and C contents to the mobile station. I can send it. In addition, the base station may transmit up to 256 identifiers of the contents provided by the multicast CID and the A broadcast station in the DSA_RSP message.

Here, when the second broadcaster broadcasts the same content as the A, B, and C content, the logical channel identifier corresponding to the A, B, and C content of the second broadcaster is assigned to the A, B, and C content of the first broadcaster. It may be the same as or different from the corresponding logical channel identifier. Of course, the corresponding broadcast service may be distinguished from each other by different CIDs of the first broadcast station and the second broadcast station.

4 is a signal flowchart illustrating a broadcast service connection procedure in a broadband wireless access communication system according to an embodiment of the present invention.

Referring to FIG. 4, first, the mobile station 400 searches and detects a broadcast service list broadcast from the MBS server 480 to find a broadcast service that can be received through the base station 450 (step 402). The broadcast service list includes information for allowing the mobile station 400 to receive a broadcast service.

The mobile station 400 transmits a DSA_REQ message to the base station 450 to request MBS connection establishment (step 411). Here, the DSA_REQ message may use a conventional DSA_REQ message or may use the DSA_REQ message proposed by the present invention. That is, the DSA_REQ message proposed in the present invention means a message for requesting connection to contents provided by a corresponding broadcast service. The connection request information is included in a TLV Encoded Information field of the DSA_REQ message.

The base station 450 receiving the DSA-REQ message recognizes that the mobile station 400 is a connection establishment request for receiving a broadcast service. Herein, it is assumed that the mobile station 200 requests a single base station broadcast service or a multiple base station broadcast service, and each of the broadcast services provides a plurality of content broadcasts.

Accordingly, the base station 450 transmits a DSX-RVD (Dynamic Service X-ReceiVeD, hereinafter, 'DSX_RVD') message to the mobile station 400 (step 413). The DSX-RVD message is a message for notifying the mobile station 400 that the base station 450 normally receives and processes a DSA related message such as the DSA_REQ message.

Thereafter, the base station 450 transmits a DSA_RSP message according to the present invention to the mobile station 400 in response to the broadcast service connection request of the mobile station 400 (step 415). In the TLV Encoded Information field of the DSA_RSP message according to the present invention, a CID corresponding to the broadcast service requested by the mobile station 400 and a logical channel identifier corresponding to a plurality of content broadcasts are allocated. Note that the CID becomes a Transport CID (CID) in the case of a single base station broadcast service and a Multicast CID in the case of a multi-base station broadcast service.

Upon receiving the DSA_RSP message, the mobile station 400 transmits a DSA_ACK (DSA_ACK) message as shown in Table 8 to the base station 450 (step 417).

The mobile station 400, which has been allocated the CID for one broadcast service and the logical channel identifiers for a plurality of content broadcasts by step 417, can receive a plurality of broadcasts in a single connection setup procedure.

An example of using the CID and logical channel identifier combination as described above can be summarized as follows.

-CID: logical channel identifier == broadcast service provider: content broadcast identifier in broadcast service

The use example means that a multicast CID or a transport CID is used to identify a provider providing a corresponding broadcast service, and a logical channel identifier is used to identify a plurality of content broadcasts provided by the corresponding broadcast service. Accordingly, mobile stations can actively select a plurality of content broadcasts provided by the broadcast service provider in one connection establishment procedure.

Meanwhile, when the number of content broadcasts provided to the corresponding broadcast service provider exceeds 256, which is the number of logical channel identifiers, the base station uses a plurality of logical group identifiers (which may be Transport CIDs or Multicast CIDs) previously recognized. Can be assigned. This means that the mobile station needs to perform a plurality of DSA-REQ / RSP procedures, and the MBS server recognizes whether the mobile station should perform a plurality of DSA-REQ / RSP procedures. This should be indicated by indicating a logical group unit consisting of a maximum of 256 broadcast services in the service list. The mobile station performs the DSA-REQ / RSP procedure a number of times corresponding to the logical group information.

For example, in the MBS broadcast service list, logical group identifiers # 1 may include logical channel identifiers of contents 0 to 255, and logical group identifiers # 2 may include logical channel identifiers 256 to 511. Therefore, when the mobile station requests contents corresponding to logical channel identifiers 1,200 and 255, it is possible to transmit one DSA_REQ message, but when requesting contents corresponding to logical channel identifiers 200 and 500, two DSA_REQ messages are transmitted. It becomes possible.

Most preferably, the number of broadcast services that one CID, that is, one logical group identifier may have is extended. That is, if it is assumed that the total number of contents provided in one CID is 65536, the logical channel identifier range may be extended from 0 to 65535. This means that the length field is extended to 2 bytes.

-Multicast CID: Logical Channel Identifier == Broadcast Service Provider Group Identifier: Broadcast Service Provider

The use example shows a solution when the number of providers providing a broadcast service in one MBS zone exceeds 95. In other words, if the number of the multicast CIDs is 95, but the number of broadcast service providers exceeds 95 in one MBS zone, the multicast CID is used as an identifier of a broadcast service providing group, and the logical channel identifier is used for the multicast CID. It can be used as a substitute.

For example, broadcast service providers having a Mulicast CID value of 0 to 94 have a '0' as a broadcast service providing group identifier, and the multicast CID values of 0 to 94 are replaced with logical channel identifier values of 0 to 94. In addition, broadcast service providers corresponding to the 95th to 189th have '1' as the broadcast service providing group identifier, and the Multicast CID value is replaced with a logical channel identifier value of 0 to 94.

That is, a broadcast service providing group identifier: broadcast service provider = 0: 94 means a broadcast service provider having 94 as an existing Multicast CID value.

And, a broadcast service provision group identifier: broadcast service provider = 1:94 means a 189th broadcast service provider newly added to the MBS zone.

Here, the broadcast service providing group identifiers can be extended to 95, which is the number of Multicast CIDs. That is, the broadcast service providing group identifier is designated as a value having a range of 0 to 94.

Meanwhile, when a plurality of broadcast connections are established through a DSA_REQ / DSA_RSP message transmission / reception procedure between the mobile station and the base station, the mobile station may receive a broadcast message for the corresponding MBS connection. Accordingly, in order for the mobile station to distinguish a broadcast service and content broadcasts using the logical channel identifier, a multicast and broadcast service (hereinafter, referred to as' MBS ') _ data_IE (hereinafter,' MBS_DATA_IE ')). The modified MBS_DATA_IE is shown in Table 15 below.

As shown in Table 15, the MBS_DATA_IE format indicates that a logical channel identifier is newly added so that the mobile station can distinguish the broadcast service when the multicast broadcast service is actually mapped to the frame.

Meanwhile, in the present invention, when considering the downlink burst consisting only of broadcast services having the same CID (of course, the logical channel identifiers are different), the CID List Format parameter is added to the MBS_DATA_IE format to prevent the same multicast CID from being duplicated. do.

When the CID List Format value is 0 in the MBS_DATA_IE format, it means that the broadcast message CID in the MBS data burst indicated by the MBS_DATA_IE is not the same. That is, since more than one broadcast message CID exists, as shown in Table 13, a plurality of multicast CIDs and a plurality of logical channel identifiers are configured in pairs to distinguish the order in which broadcast service messages are allocated. That is, the mobile station should be aware that broadcast messages are included in the order of Muticast CID :: logical channel identifier in the MBS data burst indicated by the MBS_DATA_IE. Here, the broadcast message included in the MBS data burst has a form of a medium access control (MAC) frame, and a multicast CID is included in a CID field of a header area of the MAC frame. In addition, according to the present invention, when a logical channel identifier is proposed, a broadcast message is inserted into the MBS_DATA_IE in the order of Muticast CID :: logical channel identifier.

Meanwhile, when the CID List Format is 1, this means that all broadcast message CIDs in the MBS data burst indicated by MBS_DATA_IE are the same. Accordingly, the same Multicast CID does not need to be duplicated, and the order in which the broadcast service message is allocated may be distinguished by one Multicast CID and a plurality of logical channel identifiers corresponding thereto. A plurality of broadcast service messages for one logical channel identifier may be included in one MBS data burst. Note that in such a situation, a single logical channel identifier may enter multiple MBS_DATA_IE.

 5 is a flowchart illustrating a process in which a mobile station performs broadcast service connection establishment according to an embodiment of the present invention.

Referring to FIG. 5, in step 502, the mobile station searches for and detects a broadcast service list provided from the MBS server, and proceeds to step 504. In step 504, the mobile station transmits a DSA_REQ message to the base station and proceeds to step 506. Here, it is assumed that the TLV Encoded information field of the DSA_REQ message includes an indication value indicating a single base station broadcast service connection request or a multiple base station broadcast service connection request. In addition, the DSA_REQ message may use a conventional DSA_REQ message, or may use a message for requesting connection to the corresponding broadcast service and contents provided by the broadcast service proposed by the present invention. In step 506, the mobile station is assigned a CID corresponding to the requested broadcast service and at least one logical channel identifier corresponding to contents provided by the broadcast service from the base station. Here, the CID corresponding to the broadcast service is a Transport CID used in a single base station broadcast service or a Multicast CID used in a multiple base station broadcast service.

6 is a flowchart illustrating a process of performing a broadcast service connection setup by a base station according to an embodiment of the present invention.

Referring to FIG. 6, in step 602, the base station receives a DSA_REQ message including an indication value indicating a single base station broadcast service connection request or a multiple base station broadcast service connection request from a mobile station, and proceeds to step 604. Here, the DSA_REQ message may be a conventional DSA_REQ message, or may be a message for requesting connection to the corresponding broadcast service and contents provided by the broadcast service proposed by the present invention. In step 604, the base station assigns the mobile station a CID corresponding to the requested broadcast service and at least one logical channel identifier corresponding to the contents provided by the broadcast service. Here, the CID is a Transport CID or a Multicast CID.

Second embodiment

A second embodiment of the present invention relates to a method for providing a broadcast service connection by a base station when a DSA-REQ message requested by a mobile station transmits a conventional DSA-REQ message to a base station.

The conventional DSA-REQ message is a message that can be used only for a single broadcast service connection request. Accordingly, in the second embodiment of the present invention, when the base station receives the conventional DSA-REQ message from the mobile station, the base station is configured to provide information on at least one broadcast service provided in the MBS zone to which it belongs in the DSA-RSP message. The connection information is included and transmitted to the mobile station.

Accordingly, the format shown in Table 16 below must be included in the TLV Encoded information field of the DSA-RSP message and the DSA-ACK message. Table 16 shows a broadcast identifier parameter format.

Type Length Value Scope [145.146] .y N * 2 Broadcast (1), Broadcast (2), ....., Broadcast (n) DSx-RSP, DSx-ACK

The broadcast identifier parameter shown in Table 16 has a TLV encoding form and includes broadcast service (or broadcast channel) identifiers provided by the base station to the mobile station that has requested the broadcast service. When the number of broadcast identifiers is N, since the length of one broadcast identifier is 2 bytes, the total length of all broadcast identifiers is 2 * N. Of course, the length of the broadcast identifier may be changed depending on the implementation. Since the value included in the broadcast identifier is to be discussed at a higher layer than the MAC layer, there is no direct relationship with the present invention.

The mobile station which has received the DSA-RSP message including the broadcast identifier must grasp the allocation relationship between the logical channel identifier shown in Table 14 and the logical channel identifier of another concept. That is, logical channel identifiers may also be assigned from the value 0 in the order of the broadcast identifiers included in the DSA-RSP message. For example, in the Value field of Table 16, logical channel identifier 0 is assigned to the first broadcast identifier (i.e., broadcast (1)), logical channel identifier 1 is assigned to the second broadcast identifier (i.e., broadcast (2)), and N-th broadcast. The logical channel identifier N is assigned to the identifier (i.e., broadcast N). Meanwhile, even when the mobile station requests a plurality of broadcast services using a DSA-REQ message that may request connection of a plurality of broadcast services, the broadcast identifier TLV of Table 16 may be used.

Meanwhile, the base station may request an MBS connection by transmitting a DSA-REQ message to the mobile station. Therefore, the base station may transmit the broadcast identifier TLV proposed in the second embodiment of the present invention to the mobile station by including it in the DSA-REQ message. For reference, the DSA-REQ message includes one connection identifier (CID).

In this case, the mobile station that has received the DSA-REQ message including the broadcast identifier from the base station must grasp the allocation relationship of the logical channel identifier. That is, logical channel identifiers may also be assigned from the value 0 in the order of the broadcast identifiers included in the DSA-REQ message. For example, in the Value field of Table 16, logical channel identifier 0 is assigned to the first broadcast identifier (i.e., broadcast (1)), logical channel identifier 1 is assigned to the second broadcast identifier (i.e., broadcast (2)), and N-th broadcast. The logical channel identifier N is assigned to the identifier (i.e., broadcast N).

Third embodiment

The third embodiment of the present invention proposes an MBS_DATA_IE format different from the MBS_DATA_IE format in Table 15. According to the first embodiment or the second embodiment, when the mobile station becomes aware of the broadcast service granted to the mobile station, the base station transmits the MBS_DATA_IE shown in Table 17 to the mobile station by including the downlink frame.

Syntax Size (bits) Notes MBS_DATA_IE { MBS_MAP_Type = 0 4 MBS_DATA_IE Next MBS MAP change indication One This indicates whether the size of MBS MAP message of next MBS frame for these multicast CIDs included this IE will be different from the size of this MBS MAP message.      No. of Multicast CID 3      for (i = 0; i <No. of Multicast CIDs; i ++) {            Multicast CID 12 12 LSBs of CID for multicast            No. of Logical Cahnnel ID 3 12 LSBs of CID for multicast            for (i = 0; i <No. of Logical Cahnnel ID; i ++) {                 Logical Channel ID 8  Logical Channel ID            }     } MBS DIUC 4 OFDMA symbol offset 8 OFDMA symbol offset with respect to start of the MBS portion Subchannel offset 6 OFDMA subchannel offset with respect to start of the MBS portion Boosting 3 No. OFDMA symbols 7 The size of MBS data No. subchannels 6 Repetition coding indication 2 0b00 = No repetition coding of 0b01 = Repetition coding of 2 used 0b10 = Repetition coding of 4 used 0b11 = Repetition coding of 6 used Next MBS frame offset 8 The Next MBS frame offset value is lower 8 bits of the frame number in which the BS shall transmit the next MBS frame. Next MBS OFDMA symbol offset 8 The offset of the OFDMA symbol in which the next MBS portion starts, measured in OFDMA symbols from the beginning of the downlink frame in which the MBS-MAP is transmitted. If (Next MBS MAP change indication = 1) {   Next MBS No. OFDMA symbols 2 It is to indicate the size of MBS_MAP message in Next MBS portion where the BS shall transmit the next MBS frame for multicast CIDs in this IE.   Next MBS No. OFDMA subchannels 6 It is to indicate the size of MBS_MAP message in Next MBS portion where the BS shall transmit the next MBS frame for multicast CIDs in this IE.   } }

As shown in Table 17, the MBS_DATA_IE format indicates that the logical channel identifier is allocated for each Multicast CID when a broadcast service is mapped to a downlink frame. The mobile station should be aware that broadcast messages corresponding to Muticast CID :: logical channel identifiers are sequentially included in the MBS data burst region of the downlink frame. This is made possible by the mobile station reading the MBS_DATA_IE. Here, the broadcast message included in the MBS data burst region has a MAC frame form, and the multicast CID is included in the CID field of the MAC frame header region.

In addition, although the broadcast messages corresponding to the Muticast CID :: logical channel identifier may be sequentially included in the MBS data burst region of the downlink frame, the broadcast messages corresponding to the Muticast CID :: logical channel identifier are sequentially included. In this case, the logical channel identifier is included in front of the broadcast content included in the broadcast message included in the MBS data burst region.

The allocation of the Muticast CID :: logical channel identifier in the MBS data burst region of the broadcast downlink frame in the order or regardless of the order is related to whether to include the logical channel identifier in the broadcast content in the broadcast message.

Fourth embodiment

The fourth embodiment of the present invention proposes a modified MBS MAP message format. When the mobile station becomes aware of a broadcast service authorized to it, that is, when it becomes aware of a logical channel identifier, the base station can modify both MBS_DATA_IE and MBS_DATA_IE according to the present invention to provide a broadcast to the mobile station. Use MBS MAP messages. The modified MBS MAP message format is shown in Table 18 below.

Syntax Size (bits) Notes MBS-MAP Message format () {   MAC Generic Header 48 6 bytes   Management message type = 62 4   Frame number 4 The frame number is identical to the frame number in the DL-MAP  MBS_DIUC_Change_Count 8  #MBS_DATA_IE 4 Number of included MBS_DATA_IE  For (i = 0; i <n; i ++) { n = #MBS_DATA_IE    MBS_DATA_IE Variable  }  #MBS_DATA_IE with Logical Channel ID 4 Number of included MBS_DATA_IE with Logical channel ID  For (i = 0; i <p; I ++) { p = #MBS_DATA_IE with Logical Channel ID    MBS_DATA_IE with Logical Channel ID Variable  } #MBS_DATA_Time_Diversity_IE 4 Number of included MBS_DATA_Time_Diversity_IE   For (i = 0; i <m; i ++) { m = #MBS_DATA_Time_Diversity_IE MBS_DATA_Time_Diversity_IE Variable   }   If (! Byte boundary) {    Padding nibble 8  } TLV encoding element }

The MBS MAP message proposed by the present invention has a form in which a '#MBS_DATA_IE with Logical Channel ID' field is added to a conventional MBS MAP message. The mobile station refers to the conventional MBS_DATA_IE for the broadcast service recognized by the DSA-RSP message including only the Multicast CID. However, the mobile station receiving the DSA-RSP message including the logical channel identifier together with the multicast CID refers to the MBS_DATA_IE proposed in the first or third embodiment of the present invention. In Table 18, if #MBS_DATA_IE with Logical Channel ID indicating the number of logical channel identifiers is 0, it means that MBS_DATA_IE including a logical channel identifier does not exist in the MBS MAP message.

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 those equivalent to the scope of the claims.

As described above, the present invention has an advantage of minimizing resource consumption and time delay due to connection establishment by connecting a plurality of broadcast services when the MBS is connected between the base station and the mobile station. In addition, by newly suggesting a logical channel identifier, there is an advantage in that the identifier assignment for a plurality of content broadcasts is easy and the number of limited multicast connection identifiers can be extended.

Claims (37)

In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a method for establishing a broadcast service connection for a mobile station to receive the MBS, Requesting a base station to establish a connection between a specific broadcast service and a plurality of content broadcasts provided by the specific broadcast service; And allocating a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts from the base station. The method of claim 1, The connection establishment request is characterized in that the type / length / value of the Dynamic Service Addition Request (DSA_REQ) message is included in the TLV Encoded Information field. The method of claim 1, And the first identifier is a transport connection identifier (Transport CID) for identifying a broadcast service uniquely broadcast in one cell. The method of claim 1, Wherein the first identifier is a multicast CID for identifying a broadcast service broadcasted in common in a plurality of predetermined cells. The method of claim 1, And a combination value of the combination of the first identifier and the second identifier as a third identifier corresponding to each of the plurality of content broadcasts one-to-one. The method of claim 1, And a combination value of the combination of the first identifier and the second identifier is assigned to a fourth identifier corresponding to the specific broadcast service. In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a method for establishing a broadcast service connection for providing a MBS to a mobile station by a base station, Receiving a connection setting request of a specific broadcast service and a plurality of content broadcasts provided by the specific broadcast service from the mobile station; And allocating a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts to the mobile station. The method of claim 7, wherein The identifiers are characterized in that the type / length / value of the DSA_RSP message is included in the TLV Encoded Information field and assigned. The method of claim 7, wherein The first identifier is characterized in that the transport connection identifier (Transport CID). The method of claim 7, wherein The first identifier is characterized in that the multi-cast identifier (Multicast CID). The method of claim 7, wherein And a combination value of the combination of the first identifier and the second identifier as a third identifier corresponding to each of the plurality of content broadcasts one-to-one. The method of claim 7, wherein And assigning a combination value of the combination of the first identifier and the second identifier to a fourth identifier corresponding to the specific broadcast service. The method of claim 11 or 12, And transmitting information indicating the location and size of MBS data according to the first identifier and the second identifier or the third identifier or the fourth identifier in a partial region of the MBS map message of the downlink frame. The method. The method of claim 13, The MBS map message includes information indicating the number of pieces of information indicating the location and size of MBS data having the second identifier. The method of claim 13, The information indicating the location and size of the MBS data is represented by the first identifier and the second identifier. In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a broadcast service connection setting method for receiving the MBS between a mobile station and a base station, Requesting, by the mobile station, connection setting of a specific broadcast service and a plurality of content broadcasts provided by the specific broadcast service to the base station; The base station assigning a first identifier corresponding to the specific broadcast service and a second identifier corresponding to each of the plurality of content broadcasts to the mobile station; And the mobile station is provided with an MBS corresponding to the assigned identifiers. The method of claim 16, The first identifier is characterized in that the transport connection identifier (Transport CID). The method of claim 16, The first identifier is characterized in that the multi-cast identifier (Multicast CID). The method of claim 16, And a combination value of the combination of the first identifier and the second identifier as a third identifier corresponding to each of the plurality of content broadcasts one-to-one. The method of claim 16, And a combination value of the combination of the first identifier and the second identifier is assigned to a fourth identifier corresponding to the specific broadcast service. The method of claim 19 or 20, And transmitting information indicating the location and size of the MBS data according to the first identifier and the second identifier or the third identifier or the fourth identifier in a partial region of the MBS map message of the downlink frame. Said method. The method of claim 21, The MBS map message includes information indicating the number of pieces of information indicating the location and size of MBS data having the second identifier. The method of claim 21, The information indicating the location and size of the MBS data is represented by the first identifier and the second identifier. In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a broadcast service connection establishment system for providing the MBS, A mobile station requesting connection setting of a specific broadcast service and a plurality of content broadcasts provided by the specific broadcast service, and receiving a first identifier corresponding to the specific broadcast service and a second identifier corresponding to each of the plurality of content broadcasts; A base station that is requested to establish a connection between the specific broadcast service and the plurality of content broadcasts provided by the specific broadcast service and allocates a first identifier corresponding to the specific broadcast service and second identifiers corresponding to each of the plurality of content broadcasts; Said system comprising: a. The method of claim 24, And the mobile station transmits a request for establishing a connection to the plurality of content broadcasts in a TTL Encoded Information field in a type / length / value of a dynamic service addition request (DSA_REQ) message. The method of claim 24, The base station assigns the type / length / value of a dynamic service addition response (DSA_RSP) message including the identifiers in a TLV Encoded Information field. The method of claim 24, The first identifier is characterized in that the transport connection identifier (Transport CID). The method of claim 24, The first identifier is the system, characterized in that the multi-cast identifier (Multicast CID). The method of claim 24, The base station assigns a combination value of the combination of the first identifier and the second identifier to each of the plurality of content broadcasts as a third identifier corresponding one-to-one. The method of claim 24, The base station assigns a combination value of the combination of the first identifier and the second identifier to a fourth identifier corresponding to the specific broadcast service. The method of claim 30, And the base station transmits information indicating the location and size of the MBS data in the MBS data information element region of the MBS map message of the downlink frame. The method of claim 31, wherein The MBS map message includes information indicating the number of pieces of information indicating the location and size of MBS data having the second identifier. The method of claim 31, wherein The information indicating the location and size of the MBS data is represented by the first identifier and the second identifier. The method of claim 33, wherein The MBS data is included in the MBS data burst region of the downlink frame sequentially by the information indicated by the first identifier and the second identifier. The method of claim 33, wherein The MBS data is randomly included in the MBS data burst region of the downlink frame irrespective of the information indicated by the first identifier and the second identifier. 36. The method of claim 35 wherein The MBS data is divided into logical channel identifiers included in the MBS map message. In a broadband wireless access communication system supporting a multicast and broadcast service (MBS), a broadcast service connection setting method for providing the MBS, A base station transmitting a connection establishment request message including a broadcast service identifier TLV to a mobile station for connection establishment of a specific broadcast service and a plurality of content broadcasts provided by the specific broadcast service; And the mobile station sends a response to the base station request message to the base station.

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