KR101029810B1 - Broadcasting service providing method applied to broadband wireless access system - Google Patents

Abstract

The present invention provides a broadcast service flow using a medium access control message (MAC message) in which a base station includes a broadcast traffic connection identifier in a broadband wireless access system. The present invention relates to a broadcast service providing method comprising transmitting a parameter for transmitting a broadcast service data using the traffic connection identifier, and has an effect of enabling a broadcast service from a base station to a mobile terminal.

Broadband Wireless Access System, Broadcast Service, Media Access Control Message

Description

Broadcasting service providing method applied to broadband wireless access system {Method for Providing Broadcast Service in Broadband Wireless Access System}

1 is a flowchart illustrating a process of generating a service flow by a request of a mobile terminal.

2 is a flowchart illustrating a process of generating a service flow at the request of a base station.

3 is a flowchart illustrating a method of generating a broadcast service flow according to the present invention.

The present invention relates to a method for providing a broadcast service in a broadband wireless access system. More particularly, the present invention relates to a parameter for generating a service flow to a mobile station using a medium access message (MAC) message. The present invention relates to a method for providing a broadcast service by delivering the data.

In a broadband wireless access system, user data is transferred between a base station (BS) and a mobile subscriber station (MSS) through a service flow. The service flow includes a service flow identifier (SFID), a connection identifier (CID), a quality of service (QoS) parameter, and the like. Is done.

The SFID is for identifying a corresponding service flow between a base station and a mobile station, and the CID is for identifying a connection for delivering service flow traffic. On the other hand, the QoS parameter is for indicating the quality of the service flow.

1 is a flowchart illustrating a process of generating a service flow at the request of a mobile terminal. The service flow is generated by exchanging a medium access message (“MAC”) management message between the mobile station and the base station. Referring to FIG. 1, the mobile station transmits a Dynamic Service Addition Request (DSA-REQ) message to request a service flow generation of a specific QoS (S11).

The base station transmits a dynamic service addition response (DSA-RSP) message to the mobile station in response to the dynamic service addition request message of the mobile station (S12). The dynamic service addition response message includes contents of the approval or rejection of the generation of the service flow requested by the mobile terminal.

When the service flow is approved for creation, the service flow is generated between the mobile station and the base station by granting the SFID and the CID. When the service flow is generated in this way, it is possible to transfer data between the mobile station and the base station through the service flow. When the mobile station receives the service addition response message received from the mobile station, the mobile station transmits a dynamic service addition confirmation message (DSA-ACK) in response thereto (S13).

2 is a flowchart illustrating a process of generating a service flow at the request of a base station. The service flow is generated by exchanging a medium access message (“MAC”) management message between the mobile station and the base station.

The base station transmits the SF ID and the CID to the mobile terminal while requesting the generation of a service flow of a specific quality of service through a Dynamic Service Addition Request (DSA-REQ) message (S21).

The mobile station receiving the dynamic service addition request message transmits the approval and rejection of the service flow generation to the base station through a dynamic service addition response (DSA-RSP) message (S22). When receiving the service addition response message received from the mobile station, the base station transmits a dynamic service addition acknowledgment message (DSA-ACK) in response thereto (S23).

When the service flow generation is completed, it is possible to transfer data between the mobile station and the base station through the service flow.

According to the prior art, the user data is transmitted between the mobile station and the base station through the service flow generated according to the above process. However, in the case of a broadcast service, service data must be transmitted to an unspecified mobile terminal in a cell. Therefore, service data cannot be transmitted through a service flow generation process as in the prior art. In other words, unlike a unicast service or a multicast service that transmits service data to a specific mobile terminal, the broadcast service delivers the service data to a plurality of unspecified mobile terminals in an area where service can be provided. Therefore, since the mobile station cannot know which mobile terminals receive service data, there is a problem in that a service flow for transmitting broadcast service data cannot be generated through a service flow generation procedure according to the prior art.

Meanwhile, in order to provide a broadcast service, information related to a broadcast service (for example, broadcast service data transmission start time, service quality information, and CID information for broadcast service data transmission) must be delivered to mobile terminals in a cell. However, the related art has a problem that the MAC message is not defined.

The present invention has been proposed to solve the above problems, and performs a broadcast service by transmitting parameters necessary for generating a service flow to a mobile terminal using a medium access message (hereinafter referred to as "MAC") message. The purpose is to provide a method for this.

In accordance with another aspect of the present invention, there is provided a method of providing a broadcasting service applied to a broadband wireless access system, the method including: a media traffic control identifier including a broadcast traffic connection identifier; Transmitting a parameter for a broadcast service flow using a medium access control message (MAC message), and transmitting broadcast service data using the traffic connection identifier.

The present invention also provides a method for providing a broadcasting service applied to a broadband wireless access system, wherein the mobile station includes a medium access control message including a broadcast traffic connection identifier. Receiving a parameter for a broadcast service flow through a Medium Access Control Message (MAC Message) and receiving broadcast service data using the traffic connection identifier.

In addition, the present invention is a method for providing a broadcast service (Broadcasting Service) applied to a broadband wireless access system, the mobile terminal in the idle mode (idle mode) to receive a broadcast paging message (Broadcast Paging Message) A medium access control message including a step of recognizing a broadcast service using an action code included in the broadcast paging message, a medium traffic control message including a broadcast traffic connection identifier; Receiving a parameter for a broadcast service flow through a MAC message, and receiving broadcast service data using the traffic connection identifier.

The present invention also provides a method for providing a broadcasting service applied to a broadband wireless access system, wherein a mobile terminal in a sleep mode receives a traffic paging message. Recognizing a broadcast service using a broadcast service indicator included in the traffic indication message, switching to a normal execution mode, and a broadcast traffic connection identifier And receiving a parameter for a broadcast service flow through a medium access control message (MAC message), and receiving broadcast service data using the traffic connection identifier.

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

In order to provide a broadcast service to a mobile terminal, the base station transmits information related to the service to all mobile terminals in the cell for a predetermined period from before the service data transmission until the end of the service data transmission. The information related to the service includes a broadcast service data transmission start time, service quality information, CID information for broadcast service data transmission, and the like. Information related to the service is transmitted to all mobile terminals in the cell through a MAC message.                     

Table 1 below shows an example of a Broadcast Service Advertisement MAC management message.

Syntax Size Notes MOB_BCS_ADV_Message_Format () {   Management Message Type = TBD 8 bits   Service availiability 1 bits If the value is 0x01, service is available. If the value is 0x00, service is not available.   TLV Encoded Information variable TLV specific }

In Table 1, a management message type is a data field for distinguishing MAC messages, and service availability indicates whether a service is currently provided. That is, the field informs the mobile station whether the current service is in progress or the service is terminated.

On the other hand, TVL encoded information (TLV Encoded Information) represents the QoS information of the broadcast service flow, SFID, CID, etc., which is represented by a QoS parameter set or a service class name representing a specific QoS parameter set. Can be expressed as

The base station transmits the Broadcast Service Notification MAC message through a broadcast management connection, so that all mobile terminals in the cell can receive it.

3 is a flowchart illustrating a method of generating a broadcast service flow according to the present invention.

Referring to FIG. 3, when a base station wants to transmit service data through broadcasting, first, it transmits information related to a broadcast service to be transmitted to a mobile terminal in a cell through a broadcasting service advertisement message (Broadcasting Service Advertisement Message). . In this case, the broadcast service notification message is transmitted as a MAC message through a broadcast management connection.

Information transmitted through the broadcast service notification message is a data transmission start time, SFID, QoS parameters, broadcast traffic CID (Broadcast Traffic CID). The data transmission start time is represented by a frame, which means that service data transmission starts when a corresponding frame passes after receiving a message. The SFID means an ID of a service to be broadcasted. Meanwhile, the QoS parameter may be transmitted as a service class name representing a specific QoS parameter set, or may be transmitted by directly setting a QoS parameter set. In addition, the broadcast traffic CID means a traffic connection identifier for transmitting broadcast service data.

When the service start time comes, the base station delivers the broadcast service data through the broadcast traffic CID. At this time, only mobile terminals that activate the service receive the broadcast service data by receiving the broadcast traffic CID. That is, the base station provides broadcast service data to all mobile terminals that want to receive through the same broadcast traffic CID and the same physical channel for one broadcast service flow.

Even while the base station transmits the service data, the mobile terminal registers the new service to the base station due to a network entry or a handover by transmitting broadcast service related information through a broadcasting service advertisement message (Broadcasting Service Advertisement Message). Service related information can be provided to the user (S34). At this time, the mobile terminal newly registering with the base station informs that broadcast service data is currently provided. In this case, the service availability field may be set to a specific value (0x01 in this embodiment) to inform that broadcast service data is currently being transmitted.

When the broadcast service is terminated and the service is no longer available, the base station notifies the mobile stations of the broadcast service data transmission through the broadcast service advertisement message. In this case, by setting the Service Availability field of the broadcast service advertisement message to a specific value (0x00 in this embodiment), it may be informed that the broadcast service is terminated.

The mobile station in idle mode can recognize a broadcast service through an action code included in a broadcast paging message. When the mobile terminal intends to receive the broadcast service data in the idle mode, the mobile terminal checks the execution code included in the broadcast paging message. As a result, the mobile terminal joins the network to receive the broadcast service advertisement message. Data can be received. In the present invention, the execution code may be 0x03 to indicate that a broadcast service is performed.

Table 2 below shows an example of a base station broadcast paging message.

Syntax Size Note MOB_PAG-ADV_Message_Format () {   Management Message Type = ?? 8 bits   Num_Pagin Group Ids 8 bits Number of Paging Group in this message   For (i = 0; i <Num_Paging_Group_IDs; i ++) {      Paging Group ID 8 bits Number of MSS MAC Address in message can be determined from the length of the message (found in the generic MAC header)   }   For (j = 0; j <Num_MACs; j ++) { 24 bits The hash is obtained by computing a CRC24 on the MSS 48-bit MAC adderess. The polynomial for the calculation is 0x864CFB   MSS MAC Address hash 2 bits Paging action instruction to MSS   Action code 00 = No Action Required
01 = Perform Ranging to establish location and acknowledge message
10 = Enter Network
11 = Broadcast Service Indication   Reserved 6 bits   } }

Meanwhile, a mobile terminal in a sleep mode may recognize a broadcast service through a broadcast service indicator included in a traffic indication message. When the mobile station in the sleep mode is to receive broadcast service data, the broadcast service indicator included in the traffic indication message is checked, and according to the result, the mobile terminal switches to the normal execution mode and receives the broadcast service notification message. Broadcast service data may be received. In the present invention, it may represent that a broadcast service is performed by setting the execution code to 0x01.

Table 3 below shows an example of a traffic-indication message.

Syntax Size Note MOB_TRF_Message_Format () {   Management Message Type = 48 8 bits   SLPID indicator 2 bits   Broadcast Service Indicator 1 bit 0 = broadcast service is not avaiable
1 = broadcast service is avaiable   FMT 1 bit   If (FMT == 0) {      SLPID bits-map Variable   } else {      Num-pos 7 bits Number of CIDs on the positive indication list      for (i-0; i <Num-pos; i ++) {      CID 16 bits Basic CID of the SS      }   }   reserved 5 bits

The present invention is effective in enabling a broadcast service from a base station to a mobile terminal by transmitting broadcast service related information using a MAC message in a broadband wireless access system.

Claims (11)

In the broadcast service (Broadcasting Service) providing method applied to a broadband wireless access system (Broadband Wireless Access System), A base station transmits a parameter for a broadcast service flow using a first medium access control message (MAC message) including a broadcast traffic connection identifier and service availability information. step; And And transmitting broadcast service data using the traffic connection identifier. The method of claim 1, And transmitting a second medium access control message for notifying that the broadcast service flow has ended. The method of claim 2, The service availability information included in the second medium access control message indicates that the broadcast service is terminated. The method of claim 1, Transmitting the parameters for the broadcast service flow through a third medium access control message (MAC message) to a mobile station newly registered with the base station while transmitting the broadcast service data; A broadcast service providing method. The method of claim 4, wherein The service availability information of the third medium access control message indicates that a broadcast service is in progress. The method of claim 4, wherein And the third medium access control message is transmitted at regular intervals. 7. The method according to any one of claims 1 to 6, The first medium access control message further includes a service flow identifier (SFID), a quality of service (Quality of Service) and a data transmission start time. The method of claim 7, wherein The data transmission start time point is represented by a frame (frame). In the broadcast service (Broadcasting Service) providing method applied to a broadband wireless access system (Broadband Wireless Access System), Receiving, by the mobile terminal, a parameter for a broadcast service flow through a medium access control message (MAC message) including a broadcast traffic connection identifier and service availability information; And And receiving broadcast service data using the traffic connection identifier. In the broadcast service (Broadcasting Service) providing method applied to a broadband wireless access system (Broadband Wireless Access System), Receiving, by a mobile terminal in an idle mode, a broadcast paging message; Recognizing a broadcast service using an action code included in the broadcast paging message; Receiving a parameter for a broadcast service flow through a Medium Access Control Message (MAC Message) including a Broadcast Traffic Connection Identifier; And Receiving broadcast service data using the traffic connection identifier Broadcast service providing method comprising a. In the broadcast service (Broadcasting Service) providing method applied to a broadband wireless access system (Broadband Wireless Access System), Receiving, by a mobile terminal in a sleep mode, a traffic paging message; Recognizing a broadcast service using a broadcast service indicator included in the traffic indication message; Switching to the normal execution mode; Receiving a parameter for a broadcast service flow through a Medium Access Control Message (MAC Message) including a Broadcast Traffic Connection Identifier; And Receiving broadcast service data using the traffic connection identifier Broadcast service providing method comprising a.

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