KR20080069500A - Apparatus and method for transmission of service guide in broadband wireless access system - Google Patents

Abstract

An apparatus and a method for transferring a service guide in a broadband wireless access system are provided to make it unnecessary for a terminal to perform an MCID(Multicast Connection ID) to broadcast channel IP mapping operation additionally when a terminal moves between base stations within the same MBS(Multicast Broadcast Service) zone. A method for transferring a service guide comprises the following several steps. An MBS contents server multicasts an MBS contents traffic to a base station controller(301). The base station controller multicasts the received MBS contents traffic to a base station(303). A terminal transmits a service guide request message to the MBS contents server when a user requests a service guide, for example an MCID to broadcast channel IP mapping table(305). The MBS contents server performs an MBS service authentication procedure with an AAA(Accounting Authentication Authorization)(307). The MBS contents server transmits a service guide response message to the terminal wherein the service guide response message includes an MBS GTEK(General Traffic Encryption Key) for encrypting or decrypting a mapping table of broadcast channel IPs having rights according to a service class of a corresponding terminal and the MBS contents, a unique random seed value for enabling the terminal to generate an MBS root key and an MBS KEK(Key Encryption Key) to encrypt the MBS GTEK, the MBS GTEK, the MBS root key, and lifetime of the MBS KEK(309). The terminal receives the MBS contents traffic in correspondence with a corresponding MCID flow from the base station(311).

Description

Apparatus and method for delivering service guide in broadband wireless access system {APPARATUS AND METHOD FOR TRANSMISSION OF SERVICE GUIDE IN BROADBAND WIRELESS ACCESS SYSTEM}

The present invention relates to a broadband wireless access system, and more particularly, to a broadcast channel mapping table of a MAC layer name tag or an IP layer name tag vs. a higher layer name tag for a broadcast channel. (MBS CHANNEL MAPPING TABLE) or TABLE OF BROADCASTING or a combination of authentication information (AUTHENTICATION INFORMATION) service guide delivery device and method.

In general, communication systems have been developed mainly for voice services, and are gradually developing into communication systems capable of not only voice but also data services and various multimedia services. However, the voice-oriented communication system has not satisfied the rapidly increasing user's service needs due to the relatively small transmission bandwidth and high usage fee. In addition, due to the development of the communication industry and increasing user demand for Internet services, there is an increasing need for a communication system that can efficiently provide Internet services. As a result, it has been introduced into a broadband wireless access system for efficiently providing Internet services with broadband enough to meet the demand of rapidly increasing users.

The broadband wireless access system is a system for integrating and supporting not only voice but also various low speed and high speed data services and multimedia application services such as high definition video. The broadband wireless access system is based on a wireless medium using broadband such as 2GHz, 5GHz, 26GHz and 60GHz, in a mobile or fixed environment, public switched telephone network (PSTN), public switched data network (PSDN), internet network, IMT2000 network, It is a wireless communication system that can connect ATM (Asynchronous Transfer Mode) network and can support channel rates of 2Mbps or more. The broadband wireless access system may be classified into a broadband wireless subscriber network, a broadband mobile access network, and a high-speed wireless local area network (LAN) according to terminal mobility (fixed or mobile), communication environment (indoor or outdoor), and channel transmission rate. .

The wireless access method of the broadband wireless access system is being standardized by the IEEE 802.16 standardization group of the Institute of Electrical and Electronics Engineers, one of the international standardization organizations. Compared to the conventional wireless technology for the voice service, the IEEE 802.16 standard has a wider bandwidth of data and can transmit a lot of data in a short time, and all users can efficiently use the channel by sharing a channel (or resource). Do. In addition, quality of service (QoS) is guaranteed so that users can receive different quality services according to the characteristics of the service.

In the IEEE 802.16 system, a multicast and broadcast service (hereinafter referred to as MBS) standard that can provide multicast and broadcast to a plurality of mobile terminals exists. In the MBS (name of IEEE 802.16, referred to as 'MCBCS' in the Network Working Group (NWG)) standards in the same multicast, through different CID (Connection IDentifier) or different Security Association (SA), The broadcast service area can be identified. The MBS zone (MBS_ZONE) is used to indicate that the broadcast and multicast service flows are valid through the CID and SA, and the base station uses MBS zone information through a downlink channel descriptor (DDC) message. Broadcasts. That is, the MBS zone may be referred to as a base station group that uses the same CID and SA to transmit content.

Unlike the conventional unicast service, the MBS improves reception performance by allowing multiple base stations to transmit the same broadcast content at the same time and at the same frequency, and by combining and receiving packets received from multiple base stations. Can be. In the case of the existing unicast service, when the terminal exists at the cell edge, data transmission and reception are not smooth due to large interference between cells. However, in the case of the MBS, even if the terminal is located at the cell boundary, neighboring base stations transmit the same content at the synchronized time, so that the same data can be received and used from various base stations. This effect is called macro diversity gain.

At present, important problems of MBS related standard defined in IEEE 802.16e are as follows. Due to the specification, there is no broadcast message that indicates to which Multicast connection ID (Connection ID: CID) (hereinafter referred to as 'MCID') each broadcast channel IP is mapped. Each terminal needs to generate a unicast flow each time it performs a broadcast call request, deletion, change, and handoff procedure. For this purpose, the terminal must maintain an awake state. Thus, the maximum number of awake state users per sector is limited. This is a premise that a unicast flow occurs frequently even in a terminal receiving only a broadcast. Therefore, the system should allocate a channel quality information channel (CQICH) for this purpose. Here, the MCID is a factor for distinguishing each MBS_DATA_IE and each broadcast channel data burst in the MBS MAP message in the MAC layer.

In addition, even if the terminal receives only a broadcast, if a handoff situation occurs in an awake or sleep state, the handoff procedure proceeds accordingly, and accordingly, an air resource for the procedure is performed. And system processing capacity is wasted. Here, when the handoff fails, broadcast reception may be interrupted.

In addition, there is a problem in that the air resources are wasted according to the broadcast call processing procedure for each terminal. When each UE performs call request, change and delete procedures for all broadcast channels, MAP overhead is increased and data bursts of signaling MAC messages, that is, DSx messages, are generated together. do.

In addition, there is a problem in that delay caused by each broadcast call processing procedure increases. As each terminal passes through the terminal, base station, base station controller, MBS content server, and policy server for each broadcast call processing procedure, a delay is added accordingly. In particular, the user is sensitive to the call change time, the call change has to go through both the deletion and the application process, the transmission latency (latency) has a big problem in the unit of several hundred ms.

Finally, when each terminal proceeds with a broadcast call request, deletion, and change procedure, an uplink subframe is necessary, power consumption occurs due to uplink transmission according to the above procedure, and a macro diversity scheme is more complicated. There is a problem that can be done.

Accordingly, an object of the present invention is to provide an apparatus and method for delivering a service guide in a broadband wireless access system.

Another object of the present invention is a broadcast channel mapping table of a MAC layer name tag or an IP layer name tag vs. a higher layer name tag for a broadcast channel in a broadband wireless access system. It is to provide a service guide delivery device and method consisting of a combination of MBS CHANNEL MAPPING TABLE or TABLE OF BROADCASTING or AUTENTICATION INFORMATION.

Another object of the present invention is to eliminate the various causes that the terminal must maintain an awake state in a broadband wireless access system, and the periodic uplink transmission that is a disadvantage when the terminal is awake (wake) It is an object of the present invention to provide an apparatus and method for delivering a service guide which can prevent waste of power and waste of air resources required for signaling.

Another object of the present invention is to provide an apparatus and method for delivering a service guide in a multicast broadcast flow or a unicast flow in a broadband wireless access system.

According to an embodiment of the present invention to achieve the above object, a method for a terminal receiving a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a broadband wireless access system, MBS content through a unicast flow when a request is received for a mapping table of MAC layer name tag or IP layer name tag to upper layer name tag. Transmitting a mapping table request message of a MAC layer name tag or an IP layer name tag to a higher layer name tag to a server, and transmitting the request message to the terminal through the unicast flow from the MBS content server. MAC layer name tag or IP layer name tag vs. all MBS zones allowed in the MBS zone or UE (or user) to which it belongs Top tier names MAC layer name tag or IP layer name tags include a mapping table of the tag (IP layer name tag) versus (vs) is characterized in that it comprises the steps of: receiving a mapping table a response message of a higher layer name tag.

In accordance with an embodiment of the present invention, a multicast and broadcast service (hereinafter referred to as MBS) content server in a broadband wireless access system transmits a mapping table for MBS. The method may further include receiving a mapping table request message of a MAC layer name tag or an IP layer name tag vs. an upper layer name tag through a unicast flow from the terminal, and in the database, Search the mapping table of the MAC layer name tag or IP layer name tag to upper layer name tag corresponding to the MBS zone to which the terminal belongs or all MBS zones allowed for the terminal (or user). Of the MAC layer name tag or IP layer name tag vs. higher layer name tag including the searched mapping table. And transmitting a mapping table response message to the terminal through a unicast flow.

In order to achieve the above object, according to an embodiment of the present invention, a mapping table forwarding apparatus for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a broadband wireless access system may include a MAC layer name tag. Alternatively, when a request for receiving a mapping table of an IP layer name tag to a higher layer name tag is requested, a multicast and broadcast service is performed through a unicast flow. (Hereinafter referred to as MBS) transmits a mapping table request message of a MAC layer name tag or an IP layer name tag to a higher layer name tag to a content server, and transmits the unicast from the MBS content server. MAC layer name tag or IP layer corresponding to MBS zone to which UE belongs to through flow or all MBS zones allowed to UE MAC layer name tag or IP layer name tag to IP layer name tag vs. upper layer name tag mapping table containing mapping table vs. upper layer name tag Response message When receiving the mapping table request message through the unicast flow (Unicast flow) from the terminal that receives the terminal, all MBS allowed in the MBS zone to which the terminal belongs or the corresponding terminal (or user) in the database The MAC layer name tag or IP layer name tag vs. upper layer name tag corresponding to the zones is searched for, and the MAC layer name tag or IP layer name tag including the found mapping table is searched. (IP layer name tag) vs. upper layer name tag mapping table response message to send to the terminal through a unicast flow (Unicast flow) It characterized in that it comprises a MBS content server.

In order to achieve the above object, according to an embodiment of the present invention, an apparatus for delivering a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a broadband wireless access system, Generate a data burst packet and call it MSG-ADV in the present invention because it is not defined in the specification as a multicast broadcast flow (flow appended to the MCID in the specification) or broadcast flow in the period: MBS Service Guide-ADVertisement MBS content server or base station controller for transmitting and transmitting location and size information of the MAC layer name tag data burst for transmitting the generated packet to a base station, and specific MAC layer name tag data for transmitting the mapping table. MBS including the information when the location and size information of the burst is received Generate (MAP) message, and it characterized in that it comprises the base station transmitting the generated MBS map (MAP) 2-D allocation downlink map (DL-MAP) message to refer to the location of the message to the mobile station.

In order to achieve the above object, according to an embodiment of the present invention, a method of delivering a mapping table for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a broadband wireless access system may include MBS content. A server or base station controller generates a mapping table data burst packet and transmits it in a multicast broadcast flow or broadcast flow at a corresponding period, and location and size information of a MAC layer name tag data burst that delivers the generated packet. And a base station to generate a MBS map (MAP) message including the information, and the DL-MAP indicating a two-dimensional allocation position of the generated MBS map (MAP) message; ) Transmitting a message to the terminal.

According to an embodiment of the present invention to achieve the above object, a method of managing a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a terminal of a broadband wireless access system, When the base station is changed, the process of checking whether the same MBS zone ID is received from the new base station, and when a different MBS zone ID is received, the MAC layer name tag is unique for national broadcasting. Checking whether the value is a value; when the MAC layer name tag is a unique value; checking a mapping table of a corresponding MBS zone by using the MBS zone ID of the new base station; If there is a MAC layer name tag identical to the MAC layer name tag for the MAC layer name tag, MBS content is continued using the MAC layer name tag. It characterized in that it comprises a process of receiving.

According to an embodiment of the present invention to achieve the above object, a method of managing a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a terminal of a broadband wireless access system, When the base station is changed, checking whether the same MBS zone ID is received from the new base station, and when receiving a different MBS zone ID from the previous base station, using the MBS zone ID of the new base station, Checking the mapping table and continuing to receive MBS content using the corresponding IP layer name tag when the same IP layer name tag as the IP layer name tag for the existing broadcasting channel exists in the mapping table. It is characterized by.

In order to achieve the above object, according to an embodiment of the present invention, a mapping table forwarding apparatus for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a terminal of a broadband wireless access system may include the same multicast. Unicast flow having the same MAC layer name tag when receiving a mapping table of MAC layer name tag or IP layer name tag to upper layer name tag for terminals belonging to group Multicast and broadcast service (Unicast flow) (hereinafter referred to as 'MBS') MAC layer name tag or IP layer name tag (vs) upper layer name to content server Each user sends a mapping table request message of a tag, and the same from the MBS content server to the users in the multicast group. Mapping of a MAC layer name tag or an IP layer name tag to a higher layer name tag corresponding to the MBS zone to which the terminal itself belongs or all MBS zones allowed to the terminals themselves through a unicast flow The UEs receiving a mapping table response message of a MAC layer name tag or an IP layer name tag to a higher layer name tag including a table, and a unicast flow from the terminals. When the mapping table request message is received, the MAC layer name tag or the IP layer name tag corresponding to the MBS zone to which the multicast group of the terminals belong to the database or to all MBS zones allowed for the terminal (or user) is received from the database. IP layer name tag) vs. upper layer name tag search mapping table, MAC layer name including the searched mapping table And the MBS content server transmitting a mapping table response message of a tag or an IP layer name tag to a higher layer name tag to the terminals through a unicast flow. It is done.

In order to achieve the above object, according to an embodiment of the present invention, a service guide delivery device for a multicast and broadcast service (hereinafter referred to as "MBS") in a terminal of a broadband wireless access system, Combining the described embodiments, for example, Service Guide I (including at least one of a broadcast schedule or broadcast channel IP vs. higher layer broadcast channel name tag mapping table) is a broadcast flow of Service Guide II (broadcast channel IP vs. lower layer broadcast). Channel name tag mapping table or authentication information) may be delivered in a multicast flow or a unicast flow.

In order to achieve the above object, according to an embodiment of the present invention, a service guide request is made to an NSP (subject who receives a subscriber and charges for a broadcast service) server, and the NSP server triggers the MBS content server so that It is characterized in that the service guide is delivered to the user through the wireless network (delivery success is determined by the user to the MBS content server, the MBS content server to the NSP server, and the user directly to the NSP server). Here, the content and format of the service guide may be previously delivered by the NSP server to the MBS content server. In the case of the broadcast schedule, it is the format delivered to the user.In the case of authentication information, the security format generally used (random seed or double encryption) is used. For the mapping table, only the broadcast area allocation information and the broadcast schedule and mapping table forms are NSP. The MBS content server assigns the name tag of the lower layer to the MBS zone and the upper layer based on this information.

The present invention provides an apparatus and method for delivering a mapping table of MCID to (VS) broadcast channel IP in a multicast broadcast flow or a unicast flow in a broadband wireless access system, thereby providing the same MBS. When moving between base stations in a zone, the terminal does not need to perform additional MCID and broadcast channel IP mapping, and when moving between base stations in another MBS zone, MCID vs. By uniquely assigning broadcast channel IPs, these channels may receive broadcasts without additional information updates. That is, even if the MBS zones are different, seamless MBS may be provided. In addition, by eliminating various causes that the terminal must maintain an awake state, power consumption and signaling due to periodic uplink transmission, which is a disadvantage when the terminal is awake, is eliminated. There is an advantage that can prevent the waste of the necessary air resources (air resources).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, an apparatus and method for delivering a service guide in a broadband wireless access system according to the present invention will be described. Here, the service guide is a broadcast channel mapping table of a MAC layer name tag or an IP layer name tag to a higher layer name tag for a broadcast channel (MBS CHANNEL MAPPING TABLE). Or TABLE OF BROADCASTING (broadcast schedule, rate) or AUTHENTICATION INFORMATION (channel or content decryption key (MBS key) or encryption key or GTEK, where GTEK is the standard Combination of Group Traffic Key Encryption) and MBS root key and MBS random seed value for MBS channel KEK and MBS content KEK, GTEK and MBS root key and lifetime of MBS KEK) do. Here, each service guide may be configured by collecting individual broadcasting stations or NSPs (network service provider) units or a plurality of broadcasting stations or NSPs. In addition, it is a matter of course that each MBS zone unit or all MBS zones can be collected and configured.

Here, the MAC layer name tag includes an MCID and a logical channel ID (hereinafter, referred to as 'LCID'), and the IP layer name tag includes a broadcast channel IP and a content IP. In addition, the upper layer (meaning L3 layer or more) name tag may include a content ID, a broadcasting channel ID, a broadcasting station ID, and an NSP (Network Service Provider) ID. The upper layer name tag may also include the IP layer name tag. . Here, IP means multicast IP.

In this case, the method of delivering the NSP list to the terminal through air is defined in 802.16g. That is, the NSP list may be delivered to the UE through an SBC-RSP message or an SII-ADV broadcasting message delivered at initial access. In the present invention, it is assumed that a user or a terminal knows an address of an NSP server or an MBS content server. Generally, the following acquisition methods exist. Firstly, the server address is stored in the terminal in advance and configured. Secondly, the user inputs the information directly. Third, when the NSP list is transmitted during initial access, the fourth address is obtained. Fourth, the server address is obtained. The terminal may acquire the address through an interworking procedure with the server. In the fourth method, a client program located in an application layer of a terminal and a specific server managed by an operator must provide the function.

Unless stated otherwise in the present invention, the lower layer refers to the L1 (PHY) or L2 (MAC) layer, the upper layer refers to the MAC layer or more, and the L7 layer, for example, L3 (IP) or L4 (Transport) or L5 ( Application) or L6 or L7 is a combination of five layers (eg L3 & L5).

In addition, in the present invention, the part referred to as the MCID vs. broadcast channel IP mapping table is one specific embodiment of the mapping table of the MAC layer name tag to the upper layer name tag. Naturally, the mapping information of the application layer name tag is included.

In the present invention, the MBS content server is not only a final agent for delivering broadcast content using a multicast flow to a wireless network, but also a part for delivering a part or all of a service guide to a terminal through a wireless network. The broadcast schedule or authentication information may be directly transmitted to the terminal by the NSP. In other words, the MBS content server directly manages the wireless network from the point of view of a network access provider (NAP) to transmit signaling information as well as broadcast bearer traffic. When several NSPs share a single wireless network, all NSPs utilize a wireless network through an MBS content server to finally provide a broadcasting service desired by a user.

In the following description, a base station may be configured as a radio access station (RAS) or a base station (BS), and the base station controller may be configured as an access control router (ACR) or an access service network gateway (ASN GW).

1 is a diagram illustrating a network structure for providing an MBS service of a broadband wireless access system according to the present invention. As shown, the network structure includes a policy server 160, an accounting authentication authorization (hereinafter referred to as 'AAA') 150, and a content server of core networks. server) 130, a base station controller 120, a base station 110, and a terminal 100.

Referring to FIG. 1, the policy server 160 manages QoS profile information for each IP flow for a terminal requesting a service, and the AAA 150 is responsible for charging and authenticating an MBS service.

The MBS content server 130 manages and controls an MBS service, stores MBS content generated by a content provider, and stores the stored MBS content to the terminal 100 through the base station controller 120 and the base station 110. send. In addition, the MBS content server 130 manages a service guide, for example, mapping table, broadcast schedule, content and broadcast channel encryption keys, from the terminal 100, and requests a mapping table (or broadcast schedule or encryption keys). If necessary, search the mapping table (or broadcast schedule or encryption key) of the corresponding terminal 100 in the database and transmit unicast. In the case of a paid broadcasting channel or content request, or in the case of a mapping table or encryption key request, authentication may be performed in conjunction with an AAA server. As another service guide delivery method, after performing an authentication process with the AAA 150 according to the service guide request of the terminal 100, the terminal 100 to the authorized broadcast channel or broadcast content for each service class The service guide and the MBS service authorization key capable of decrypting the broadcast channel or broadcast contents formed through the authentication process, that is, the MBS GTEK (General Traffic Encryption Key) and the encryption of the GTEK. The random seed value used to generate the MBS broadcast channel KEK or the MBS broadcast content KEK used for decryption may be unicast to the corresponding terminal 100. In another service guide delivery method, the MBS content server 130 generates a service guide data burst packet to be broadcasted to a specific MCID data burst and transmits it in a multicast broadcast flow or broadcast flow at a corresponding period, and the packet The location and size information of a specific MCID data burst for transmitting the packet may be transmitted to the MAP message generating entity, for example, the base station 110. In another service guide delivery method, the MBS content server basically serves to allocate an MBS zone for each broadcast zone and a multicast IP and MAC layer name tag for each broadcast channel. When a plurality of NSPs utilize a single wireless network, the NSPs provide a user with a desired broadcast service through the MBS content server. For example, when NSP server delivers broadcasting area information and broadcasting schedule information to MBS content server, it creates mapping table based on this. When the MBS content server, not the NSP server, generates the broadcasting schedule or authentication information that is finally delivered to the user, the NSP server also delivers the contents necessary for generation to the MBS content server.

The base station controller 120 is in charge of packetization and time stamping to manage the connection and mobility of the terminal 100 and the content from the MBS content server 130. Received and delivered to the base station (110). In addition, the base station controller 120 generates a service guide data burst packet to be broadcast to a specific MCID data burst and transmits it in a multicast broadcast flow or broadcast flow at a corresponding period, and transmits the packet for transmission of the packet. The location and size information of the specific MCID data burst to be transmitted may be transmitted to the MAP message generating entity, for example, the base station 110.

The base station 110 interfaces with a wireless connection according to the IEEE 802.16 standard to provide a connection of a wireless section to the terminal 100, and transmits content from the base station controller 120 to the terminal 100. do. In addition, the base station 110 includes the information when the location and size information of a specific MCID data burst for transmission received from the MBS content server 130 or the base station controller 120 or the WSM is received. A MBS MAP message may be generated, and a DL-MAP message indicating a 2D allocation position of the generated MBS MAP message may be transmitted to the terminal 100. Finally, the terminal 100 supports the IEEE 802.16 standard and provides a MBS service to the user.

As shown, one MBS zone (MSB_ZONE) is composed of a plurality of base stations, base stations in the same MBS zone (MSB_ZONE) transmits the same broadcast content to the service terminal at the same time.

2 is a diagram illustrating a service guide delivery method using a multicast broadcast flow in a broadband wireless access system according to a first embodiment of the present invention.

Referring to FIG. 2, in general, a transmitter of an IEEE 802.16 communication system, which is a communication system providing MBS, transmits MBS data to receivers at the same frame number and the same OFDM symbol at the same time using the same coding scheme. do. In this case, in order for a receiver located at the edge of each service area to obtain a macro diversity effect through radio frequency combining, the transmitter divides the MBS area from the downlink frame and divides the MBS area. MBS data must be transmitted through the area. In addition, the receiver receives an MBS-map (MBS-MAP: hereinafter referred to as 'MBS-MAP') message including information on the MBS region that the receiver should receive in a downlink frame and recognizes the MBS region. Receive MBS data transmitted through the area. Here, the MAP message for transmitting downlink resource allocation information is a downlink map (DownLink-MAP: hereinafter referred to as 'DL-MAP') message.

Here, the downlink frame of the communication system providing the MBS may be represented by subchannels and symbols in a time domain and a frequency domain. The downlink frame includes a DL-MAP region, an MBS-MAP message region, and a plurality of MBS data burst regions.

The DL-MAP region is a region for transmitting DL-MAP information and includes a DL-MAP IE region for indicating a burst to be transmitted in a current frame. It further includes a map information element (MBS_MAP_Information Element: hereinafter referred to as 'MBS_MAP_IE'). The MBS_MAP_IE 201 included in the MBS_MAP_IE area provides location information and decoding information of the MBS-MAP message 203, and the receivers transmit the MBS-MAP message (MBS-MAP message) transmitted to the MBS-MAP message area through the MBS_MAP_IE 201. 203).

The MBS-MAP message area includes an MBS_Data_Information Element (MBS_Data_IE) area, and transmits MBS_Data_IE including information of MBS data burst areas to the receiver through the MBS_Data_IE area, and the receiver The MBS data transmitted through the MBS data burst region allocated to a specific MBS frame is processed, that is, decoded and received using the information included in the MBS_Data_IE.

Here, the service guide delivery method proposed in the present invention is to transmit the service guide to the data burst transmitted to a specific MCID for all zones in a multicast broadcast flow. That is, the service guide is periodically transmitted to the terminal through a specific MCID. At this time, the specific MCID number is the same for all zones, but the transmission time, the transmission period, and the contents of the transmitted service guide may be configured differently for each MBS zone. Here, the transmission period of the service guide can be adjusted according to the operator in the standard frame.

For example, the service guide may be a mapping table of MCID and broadcast channel IP, and the mapping table is managed in an array, and as shown in FIG. 7, the channel ID (or content ID), zone ID, The broadcast channel may include a multicast IP address and an MCID (or LCID). Since the size of the MCID and the broadcast channel multicast IP address is constant, for example, 12 bits and 32 bits (LCID is 8 bits), the total size of the mapping table according to the number of broadcast channels for each MBS zone is determined. It can be seen. Therefore, when transmitting the mapping table to a specific MCID, the only information necessary for calculating the size is the number of broadcast channels, that is, the array size, and since the MBS MAP message should include the location and size information of the MCID data burst, The simpler the information needed to calculate, the better.

Here, the service guide data burst packet may be generated by the MBS content server 130 or the base station controller 120. Here, since the MBS content server 130 provides a stream for all data bursts transmitted to the MCID, when the MBS content server 130 generates a service guide data burst packet, the MBS content server 130 generates the stream. The MBS content server 130 has the advantage of simply utilizing the data burst as it is. On the other hand, the base station controller 120 performs packetization to generate a burst size according to air scheduling for each MBS zone, and also needs information, for example, MCID, for packetization. Since the broadcast channel configuration management information for each broadcast channel IP and MBS zone is included, the base station controller 120 may generate the service guide data burst packet. In this case, the MBS content server 130 or the base station controller 120 generates a MAP message because the location and size information of the MCID data burst for delivering the service guide content should be included in the MBS MAP message. The information to the subject, for example, the base station 110 to inform in advance. At this time, the base station 110 includes the location and size information of the MCID data burst that delivers the service guide content in the MBS MAP message using the information, and includes the service guide in the MBS burst. To transmit to the terminal 100.

Meanwhile, in the first embodiment of the present invention, the service guide for each zone is delivered as a data burst of a specific MCID, but the method for delivering the service guide for each zone as a broadcast CID is also provided. It is possible.

3 is a diagram illustrating a service guide delivery method to one user who requests a unicast flow in a broadband wireless access system according to a second embodiment of the present invention.

Referring to FIG. 3, the MBS content server 330 multicasts the MBS content traffic to the base station controller 320 in step 301, and the base station controller 320 transmits the received MBS content traffic to the base station in step 303. Multicast transmission to 310.

Thereafter, when the terminal 300 requests a service guide, for example, MCID-to-vs. Broadcast channel IP mapping table, in step 305, a service guide request message is sent to the MBS content server 330. Send it. Here, the service guide request message includes a terminal IP and a base station ID. In this case, the MBS content server 330 may or may not perform an MBS service authentication process with the AAA 350. That is, when transmitting a response message to the service guide request message, the service guide response message including only the service guide corresponding to the MBS zone to which the terminal 300 belongs or all the MBS zones allowed for the terminal (or user) Although it may be transmitted to the terminal 300, the MBS GTEK (MBS GTEK) value is transmitted simultaneously with the service guide through the MBS service authentication process with the AAA 350, the MBS GTEK value for the channel to view, In other words, the service authorization key value must exist to enable monitoring.

In other words, when the MBS content server 330 does not perform the MBS service authentication process with the AAA 350, the MBS content server 330 is the MBS zone to which the terminal 300 belongs or the corresponding terminal (or The service guide corresponding to all MBS zones allowed by the user) is searched, and the process proceeds directly to step 309 and a service guide response message including the found service guide is transmitted to the terminal 300.

On the other hand, when the MBS content server 330 performs the MBS service authentication process with the AAA 350, the MBS content server 330 performs the MBS service authentication process with the AAA 350 in step 307. Here, in the MBS service authentication process, the MBS content server 330 transmits an MBS service authentication request message including the terminal IP to the AAA 350, and the AAA 350 receiving the message receives the corresponding terminal. After performing the authentication, the random seed for generating the MBS service authorization key, that is, MBS GTEK (General Traffic Encryption Key), which can decrypt the authorized broadcast channel IPs for each service class of the corresponding terminal 300. (Seed) GTEK key lifetime to inform the validity of the GTEK and MBS root key and MBS channel / content KEK (Key Encryption Key) generated by the terminal and AAA server for each initial access. A unique random seed that enables the internal generation of a value and an MBS root key for encrypting the MBS GTEK and an MBS channel / content KEK (Key Encryption Key). ) Value, the MBS lu It is performed by sending an MBS service authentication response message including a key lifetim value to inform the validity period of a key, MBS channel / content KEK value, and subscriber's MBS service class information to the MBS content server 330. . As another method, the MBS service authentication process may be performed periodically. In other words, the MBS content server 330 manages the MBS GTEK value, and the MBS content server 330 may update the MBS GTEK value according to a periodic trigger of the AAA 350. .

Thereafter, the MBS content server 330 is a service guide corresponding to the MBS zone to which the terminal belongs or all MBS zones allowed for the terminal (or user) in a database, for example, MCID vs. broadcast channel IP. Search the mapping table, generate MBS GTEK for MBS service class information of the subscriber by using the random seed value received from the AAA 350, and receive the MBS root key received from the AAA 350 And MBS GTEK with the MBS Key Encryption Key (KEK) value, and then, in step 309, for broadcast channel IPs authorized for each service class of the corresponding terminal 300 in the searched mapping table. MBS GTEK (General Traffic Encryption Key) for encrypting / decrypting the mapping table and MBS contents of the created terminal 300, MBS root key for encrypting the MBS GTEK And a terminal unique random seed value for generating an MBS KEK (Key Encryption Key) internally in the terminal, and a key lifetime value of the MBS GTEK or MBS root key and MBS KEK. The service guide response message is transmitted to the terminal 300. Here, the service guide response message may include a broadcast time schedule including information on the broadcast time zone of each broadcast channel.

Here, the service guide request message and the response message are transmitted / received in a unicast flow via HTTP (HyperText Transfer Protocol) or an interoperable protocol. In this case, the terminal 300 receiving the service guide message may transmit an ACK / NACK to the MBS content server 330. When performing the ACK / NACK transmission procedure, when receiving the NACK, the MBS content server 330 may retransmit accordingly. On the other hand, when the ACK / NACK transmission procedure is not performed, when the terminal 300 does not receive the service guide, the terminal 300 internally allows the user to recognize the request and abandons a retransmission request or abandonment. You can decide.

Thereafter, the terminal 300 receives the multicast MBS content traffic corresponding to the MCID flow from the base station 310 in step 311. In this case, the received traffic is displayed on the user interface via the PHY layer and the MAC layer through the generated flow path.

3 is an effective method for reducing resource waste when the number of MBS zones is small and each MBS zone covers a wide area. In addition, the mapping table may be transmitted at the request of the terminal as described above, or may be transmitted to the corresponding terminal at the request of the AAA or MBS content server or the policy server.

4 is a diagram illustrating a service guide delivery method through an interworking procedure with an NSP in a broadband wireless access system according to a third embodiment of the present invention.

Referring to FIG. 4, the MBS content server 430 multicasts the MBS content traffic to the base station controller 420 in step 401, and the base station controller 420 transmits the received MBS content traffic to the base station in step 403. Multicast transmission to 410.

In this case, the MBS content server 430 may communicate with one or more NSPs 460 through a cellular network. In step 405, service guide information, that is, service guide content and contents are periodically transmitted from the one or more NSPs 460. Receive the format. For example, the delivery format of the service guide is the format delivered to the user in the case of a broadcast schedule, using the security format generally used for authentication information (random seed or double encryption), and in the case of the mapping table, the broadcast domain. Assignment information, broadcast schedule information, and mapping table formats may be used. Here, the NSP 460 is a subject that receives a subscriber and charges a broadcast service.

In operation 407, when the service guide is requested according to a user's key manipulation, the terminal 400 transmits a service guide request message to the one or more NSPs 460. Here, the service guide request message includes a terminal IP and a base station ID. In this case, the NSP 460 may trigger the MBS content server 430 in step 409 so that the MBS content server 430 delivers the service guide to the user through a wireless network.

In this case, the MBS content server 430 generates a service guide based on the service guide information in step 411. For example, the MBS content server 430 allocates a name tag of a lower layer to an MBS zone and an upper layer. A service guide response message including a requesting service guide is generated and transmitted to the terminal 400 according to a corresponding delivery format. Here, in the service guide response message, for example, a mapping table for broadcast channel IPs authorized for each service class of the corresponding terminal 400 and MBS contents of the generated terminal 400 are encrypted / encrypted. Terminal unique to enable internal generation of MBS GTEK (General Traffic Encryption Key) for decryption, MBS root key for encrypting MBS GTEK, and MBS Key Encryption Key (KEK) A unique random seed value, a key lifetime value of the MBS GTEK or MBS root key and MBS KEK may be included.

In step 413, the terminal 400 transmits a service guide Ack indicating the successful delivery of the service guide response message to the MBS content server 430. In this case, the MBS content server 430 sends the service guide Ack to the MBS content server 430. The service guide Ack is transmitted to the NSP 460.

Here, without the steps 405 and 409, the NSP 460 may directly transmit the service guide according to the service guide request of the terminal 400 to the terminal 400, in which case, the terminal 400 The service guide Ack is sent directly to the NSP 460.

5 is a diagram illustrating a service guide delivery method through an interworking procedure with an NSP in a broadband wireless access system according to a fourth embodiment of the present invention.

Referring to FIG. 5, the MBS content server 530 multicasts MBS content traffic to the base station controller 520 in step 501, and the base station controller 520 transmits the received MBS content traffic to the base station in step 503. Multicast transmission to 510.

In operation 505, when the service guide is requested according to a user's key manipulation, the terminal 500 transmits a service guide request message to the one or more MBS content servers 530. Here, the service guide request message includes a terminal IP and a base station ID.

In this case, the MBS content server 530 communicates with the NSP 560 in step 507 to receive service guide information, that is, service guide content and delivery format from the NSP 560. For example, the delivery format of the service guide is the format delivered to the user in the case of a broadcast schedule, using the security format generally used for authentication information (random seed or double encryption), and in the case of the mapping table, the broadcast domain. Assignment information, broadcast schedule information, and mapping table formats may be used.

 In step 509, the MBS content server 530 generates a service guide based on the service guide information. For example, the MBS content server 530 allocates a name tag of a lower layer to an MBS zone and an upper layer. A service guide response message including a requesting service guide is generated and transmitted to the terminal 500 according to a corresponding delivery format. Here, in the service guide response message, for example, a mapping table for broadcast channel IPs authorized for each service class of the terminal 500 and MBS contents of the generated terminal 500 are encrypted / encrypted. Terminal unique to enable internal generation of MBS GTEK (General Traffic Encryption Key) for decryption, MBS root key for encrypting MBS GTEK, and MBS Key Encryption Key (KEK) A unique random seed value, a key lifetime value of the MBS GTEK or MBS root key and MBS KEK may be included.

In step 511, the terminal 500 receives the multicast MBS content traffic corresponding to the MCID flow from the base station 510. In this case, the received traffic is displayed on the user interface via the PHY layer and the MAC layer through the generated flow path.

On the other hand, the client program (Client program) located in the application layer (Application layer) of the terminal according to the present invention is MAC layer name tag (IP layer name tag) or IP layer name tag (IP layer name tag) for the broadcast channel ( vs) Manage the broadcasting channel mapping table (MBS CHANNEL MAPPING TABLE) of the upper layer name tag, when the user selects, changes or deletes a specific broadcast channel, as shown in Figure 6, while communicating internally with the MAC layer of the terminal Instruct the operation.

For example, when a user applies for a specific broadcast channel, the application layer may instruct the MAC layer to transmit a MAC layer name tag corresponding to the broadcast channel, receive data of the channel, and transmit the data to the upper layer. . In addition, when a user changes a specific broadcast channel, the application layer delivers a MAC layer name tag corresponding to a new broadcast channel to the MAC layer, stops receiving data of a previous broadcast channel, and receives data of a new broadcast channel. Instruct to send to higher layers.

In this case, the MAC layer may instruct the PHY layer to open a physical port to receive a corresponding MCID (or LCID) flow, and for this purpose, a signaling request between each layer interface and a signaling request Signaling response (Signaling RSP) is transmitted and received for. Or ACK may be present. As such, if all signaling instructions are performed well, a flow path is generated, and the received data is displayed on the user interface through the MAC layer at the PHY layer.

In addition, when the user deletes a specific broadcast channel, the application layer may instruct the MAC layer to transmit a MAC layer name tag corresponding to the broadcast channel and stop receiving data of the channel.

As such, the MAC layer may transmit a response (RSP) signal to a higher layer in response to a request (REQ) procedure of the application layer for requesting, changing, or deleting the specific broadcast channel (or broadcast content). RSP) signal may include a corresponding MAC layer name tag or IP layer name tag, respectively. In this case, the upper layer receiving the response signal may transmit a confirmation signal including a result of confirming whether the name tag included in the response signal is identical to the originally requested name tag to the lower layer. At this time, the lower layer performs the procedure initially requested by the application layer only when the confirmation signal is ACK. If the upper layer does not receive a response (RSP) signal or if the response signal is received but a name tag different from the previously requested name tag is received, the corresponding request (REQ) procedure is retried. In this case, when the confirmation procedure exists, the request procedure may be retried by including the corresponding MAC layer name tag or IP layer name tag in the message for the confirmation procedure.

Alternatively, the MAC layer of the terminal may receive all MBS data from the base station, and may transmit only all data or data corresponding to the MAC layer name tag instructed to be transmitted from the higher layer to the upper layer. In this case, since the upper layer manages the mapping table, it is possible to select a necessary broadcast channel.

Here, although not the 802.16 standard, all MCID flows in the MBS zone may be received from the base station through the DCD message. The DCD message is a message broadcasted by the base station to transmit MBS zone information to the terminal. When the base station transmits the MCID flow through the message, there is an advantage of not having to update the MCID flow at each handover of the terminal. Alternatively, whenever the MBS zone is changed, the terminal 100 may request all MCID flows in the MBS zone to the application layer and receive the same through a conventional DSA procedure. In this case, the MCID flow may be received through one DSA procedure or a continuous DSA procedure as many as the number of MCIDs. Alternatively, all MCID flows in the MBS zone according to the 802.16 standard may be obtained by reading all MBS map (MAP) messages belonging to a base station having a transmission period of up to 256 frames. In this case, the MBS zone ID and MCID may be managed in both a client program, a MAC layer, and a PHY layer.

FIG. 6 is a diagram illustrating a terminal operation when there is a MAC layer name tag vs. an upper layer mapping table. However, when an IP layer name tag vs. an upper layer mapping table exists, the application layer of the terminal uses an IP layer name tag. Drop the IP layer and instruct the IP layer to send the flow of the channel to the application layer, the IP layer instructs the MAC layer to receive and transmit the flow of all MCIDs of the MBS zone to the IP layer, Among the flows received from the MAC layer, only the IP flow requested by the application layer may be selected, and the rest may be discarded and transmitted to the application layer.

Meanwhile, in the present invention, the MBS content server has been described as an example of transmitting a mapping table for all MBS zones allowed for the MBS zone to which the terminal belongs or the terminal (or user) to the terminal. When the operator transmits a mapping table for each zone by setting the zone area to a narrow area, when the terminal moves to another zone, the terminal recognizes this and has to request a new mapping table from the MBS content server. In this case, it may be better for the MBS content server to transmit mapping tables for all MBS zones than to transmit only the mapping table for the corresponding zone to the terminal. Since the mapping table may be different, the MBS zone ID should be further included.

Meanwhile, in the present invention, the MCID and the broadcast channel IP have a 1: 1 correspondence, but a plurality of broadcast channel IPs may be mapped to one MCID. The broadcast channel IP, the LCID, and the content ID have a 1: 1: 1 mapping relationship, and the MCID and the LCID have a 1: 1 or 1: N mapping relationship. Accordingly, the MCID and the broadcast channel IP may have a 1: N mapping relationship. That is, a plurality of broadcast channel IPs may be mapped to one MCID. In addition, since the MCID and the broadcast channel IP correspond to each other and have a relationship of MCID: LCID = 1: N and LCID: broadcast content = 1: 1, N broadcast contents may be mapped in one broadcast channel IP. That is, a plurality of broadcast contents may be mapped to one MCID or one broadcast channel IP.

Meanwhile, the service guide request message transmitted by the terminal to the MBS content server according to the present invention may include a request for traffic information, such as a transmission rate, to manage the internal MBS traffic of the terminal. The service guide response message including the traffic information for each of the broadcast channels included in the service guide may be transmitted to the terminal.

Meanwhile, the MCID and the broadcast channel IP according to the present invention may be managed separately, that is, the MBS content server may manage only the broadcast channel IP. In this case, the MBS content server may manage the MCID from the database managing the MCID. By receiving the MCID, a service guide for broadcast channels or contents allowed for the MCID may be transmitted to the terminal.

On the other hand, if MCID (or LCID) is uniquely assigned to specific broadcasting channels such as national broadcasting, that is, if the MBS zone is different, the global unique value will be assigned within another MBS zone. Even when moving between base stations, a broadcast may be received without additional information update for the channels. To this end, for each MCID (or LCID) of the mapping table included in the service guide response message, it may be transmitted by including information on whether the corresponding MCID (or LCID) is a globally unique value, and the terminal is transmitted from the base station to the DCD When receiving an MBS zone-specific MCID (or LCID) through a message or an existing DSA procedure, it may be transmitted by including information on whether the corresponding MCID (or LCID) is a globally unique value.

Meanwhile, the terminal IP described in the embodiment of the present invention is a specific example of NAI (Network Access Identification), wherein the NAI corresponds to a user ID or a terminal ID, and another example of the NAI is a unique MAC address of the terminal. Can be mentioned.

Meanwhile, the broadcast channel described in the embodiment of the present invention may mean a broadcasting station such as KBS, MBC, or SBS, or may mean content such as news, drama, or movie provided by KBS. Similarly, MCID or LCID may mean a broadcasting station or content.

Meanwhile, the MBS content server described in the embodiment of the present invention may be a network entity, an ASP (Assess Service Provider) such as KT, SKT, and Sprint, and a BSP (Broadcast Service Provider) such as KBS. , MBC, naver, or general broadcaster) are divided into several network entities to generate multicast traffic, create mapping tables, create broadcast schedules, encrypt keys and random seed and life time. You can also manage different software function blocks separately. In the present invention, the network entities managed by the ASP and the BSP are collectively called a CSN (Core Service Network).

On the other hand, the configuration of the mapping table according to the present invention can be changed according to the operator policy, the change time can be determined in consideration of the MBS GTEK refresh (refresh) time. For example, the MBS GTEK playback may be performed on a day or week basis in a time zone where no broadcast is performed, and the MBS content server may change the contents of the mapping table before playing the MBG GTEK in a time zone during which the broadcast is not performed. . In this case, after changing the mapping table, the MBS content server informs the base station controller supporting all MBSs of the changed information so as to update necessary information. In particular, since the MAC layer name tag and the upper layer name tag mapping information for each MBS zone ID are managed by the base station controller, they must be updated periodically.

Meanwhile, in the embodiment of the present invention, the mapping table of the name tag of the MCID vs. broadcast channel IP vs. application layer has been described as an example, but various mapping table combinations are possible, for example, IP Of course, the mapping table of the hierarchical name tag to the application layer name tag is also possible.

Meanwhile, when a user raises traffic to a higher layer, a name tag between the new application layer and the MAC layer may be used instead of the MAC layer name tag received from the application layer to distinguish the traffic from other traffic. Here, the name tag between the new higher layer (application or L3 or L4) layer and the MAC layer may be configured as a new name tag having a small size that is 1: 1 mapped to the MAC layer name tag rather than the MAC layer name tag. This reduces overhead due to the long size length of the MAC layer name tag and applies the same rules to all traffic calls between the upper (application or L3 or L4) layer and the MAC layer internally in the terminal. To distinguish them.

Meanwhile, when the UE moves between base stations or sectors, the UE implements an internal implementation operation to provide seamless MBS support as follows. Here, it is assumed that the terminal can know whether the base station provides the MBS and the MBS zone to which it belongs. According to the 802.16 standard, when the MBS zone ID is transmitted to the terminal through DCD, and the MBS zone ID = 0 is received, the terminal may know that the base station does not provide the MBS.

First, the algorithm when the application layer manages the MAC layer name tag and the application layer name tag mapping table is as follows. First, the terminal checks whether or not the new base station is the base station providing the MBS through the DCD. If, when the new base station provides the MBS base station date and time, the terminal checks whether the same MBS zone ID is received, that is, whether the same MBS zone is received, and when the same MBS zone ID is received, Continue to receive MBS content through the base station. On the other hand, when the same MBS zone ID is not received, the terminal checks whether the MAC layer name tag is a unique value for nationwide broadcasting, and when the MAC layer name tag is a unique value, The mapping table of the corresponding MBS zone is checked using the MBS zone ID. In this case, if the same MAC layer name tag as the MAC layer name tag for the existing broadcast channel exists in the mapping table, MBS content is continuously received using the corresponding MAC layer name tag, otherwise, for the existing broadcast channel Perform the deletion process. On the other hand, when the MAC layer name tag is not a unique value, the deletion process is performed. On the other hand, when the new base station is not the base station providing the MBS, the terminal displays that it is not the broadcast reception area on the display. In the case of using the above algorithm, when the application layer of the terminal looks down the MAC layer name tag to the MAC layer, it informs whether the corresponding MAC layer name tag is a unique value for national broadcasting.

Next, the algorithm when the application layer manages the IP layer name tag and the application layer name tag mapping table is as follows. First, the terminal checks whether or not the new base station is the base station providing the MBS through the DCD. If, when the new base station provides the MBS base station date and time, the terminal checks whether the same MBS zone ID is received, and continues to receive MBS content when the same MBS zone ID is received. On the other hand, when the same MBS zone ID is not received, the terminal checks the mapping table of the corresponding MBS zone using the MBS zone ID of the new base station. At this time, if there is a broadcast channel IP identical to the broadcast channel IP for the existing broadcast channel in the corresponding mapping table, the MBS content is continuously received using the broadcast channel IP, otherwise the deletion process for the existing broadcast channel is performed. Perform. On the other hand, when the new base station is not the base station providing the MBS, the terminal displays that it is not the broadcast reception area on the display.

Meanwhile, in the case of WiMAX, the MAC layer name tag for the multicast broadcast flow is MCID or LCID, and the MAC layer name tag for the broadcast flow is BCID (Broadcast CID). Here, there are five ways of informing the users of the MAC layer name tag that transmits the service guide (these are not defined in the current standard and most require additional parameters). Firstly, through a broadcasting MAC message (DL-MAP or DCD or NBR-ADV or TRF-IND or PAG-ADV in the case of WiMAX), and secondly, fix the MAC layer name tag that carries the service guide to a specific value. And specify in the standard (MCID = 0 or BCID = 0 in the case of WiMAX), and third, specify the MAC layer name tag that transmits the service guide with additional parameters when transmitting the NSP list (802.16g in the case of WiMAX). Defines the way to send NSP list to air, and adds additional parameter to inform MCID or LCID or BCID value). Fourth, user requests to NSP or MBS content server through unicast flow. Finally, there is a method of acquiring the terminal in advance if each NSP is involved in the terminal supply.

Meanwhile, the present invention may use different delivery methods for each service guide. For example, service guide I (including one or more of the broadcast schedule or broadcast channel IP vs. the upper layer broadcast channel name tag mapping table) is delivered as a broadcast flow, and service guide II (broadcast channel IP vs. the lower layer broadcast channel name tag). The mapping table or authentication information) may be delivered as a multicast flow or a unicast flow.

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 determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 is a diagram illustrating a network structure for providing an MBS service of a broadband wireless access system according to the present invention;

2 is a diagram illustrating a service guide delivery method using a multicast broadcast flow in a broadband wireless access system according to a first embodiment of the present invention;

3 is a diagram illustrating a service guide delivery method to one user who requests a unicast flow in a broadband wireless access system according to a second embodiment of the present invention;

4 is a diagram illustrating a service guide delivery method through an interworking procedure with an NSP in a broadband wireless access system according to a third embodiment of the present invention;

5 is a diagram illustrating a service guide delivery method through an interworking procedure with an NSP in a broadband wireless access system according to a fourth embodiment of the present invention;

6 is a diagram illustrating an internal operation of a terminal according to the present invention; and

7 is an exemplary diagram illustrating a mapping table of a broadband wireless access system according to the present invention.

Claims (53)

In a method of receiving a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a terminal in a broadband wireless access system, MBS content through a unicast flow when a request is received for a mapping table of MAC layer name tag or IP layer name tag to upper layer name tag. Sending a mapping table request message of a MAC layer name tag or an IP layer name tag to a higher layer name tag to a server; MAC layer name tag or IP layer name tag corresponding to the MBS zone to which the terminal belongs or all the MBS zones allowed in the terminal (or user) through the unicast flow from the MBS content server. vs) receiving a mapping table response message of a MAC layer name tag or an IP layer name tag to a higher layer name tag including a mapping table of a higher layer name tag. How to. The method of claim 1, remind The mapping table request message includes at least one of a network access identification (NAI), a base station ID, and request information of traffic information. The method of claim 1, The mapping table request message or the mapping table response message is transmitted and received using a HyperText Transfer Protocol (HTTP) or an interoperable protocol. The method of claim 1, The mapping table response message includes a mapping table for upper layer name tags authorized for each service class of the terminal, an MBS GTEK (General Traffic Encryption Key) for encrypting / decrypting MBS content of the terminal, A unique random seed value for enabling internal generation of an MBS root key and an MBS key encryption key (KEK) for encrypting the MBS GTEK, the MBS Whether the GTEK or MBS root key and MBS KEK's key lifetime value, subscriber's MBS service class information, MBS zone ID, traffic information, broadcast time zone information, and the MAC layer name tag are globally unique values for national broadcasting channels. And at least one of information about whether or not. The method of claim 1, The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). The method of claim 1, The upper layer name tag may include at least one of a broadcast channel IP, a content ID, and a broadcast channel ID. The method of claim 1, The IP layer name tag is a broadcast channel multicast IP. The method of claim 1, And transmitting an ACK / NACK for the mapping table response message to the MBS content server. The method of claim 1, And if the mapping table response message is not received from the MBS content server, determining a retransmission request or abandonment. In the method of transmitting a mapping table for MBS in a multicast and broadcast service (hereinafter referred to as 'MBS') content server in a broadband wireless access system, Receiving a mapping table request message of a MAC layer name tag or an IP layer name tag to a higher layer name tag through a unicast flow; Mapping table of MAC layer name tag or IP layer name tag to (vs) higher layer name tag corresponding to MBS zone to which the terminal belongs or all MBS zones allowed in the terminal (or user) in the database And a mapping table response message of a MAC layer name tag or an IP layer name tag to a higher layer name tag including the found mapping table through a unicast flow. Transmitting to the terminal. The method of claim 10, The mapping table request message includes at least one of a network access identification (NAI), a base station ID, and request information of traffic information. The method of claim 10, The mapping table request message or the mapping table response message is transmitted and received using a HyperText Transfer Protocol (HTTP) or an interoperable protocol. The method of claim 10, wherein the mapping table response message is transmitted. When the mapping table request message is received, a MAC layer name tag or an IP layer name tag corresponding to the MBS zone to which the terminal belongs or all MBS zones allowed for the terminal (or user) in the database. (vs) searching for a mapping table of upper layer name tags, and extracting a mapping table for upper layer name tags authorized for each service class of the terminal from the searched mapping tables; Transmitting a MBS service authentication request message to a billing / authentication server (hereinafter referred to as 'AAA'), Receiving, from the AAA, an MBS service authentication response message including parameters for generating MBS GTEK (General Traffic Encryption Key) values of upper layer name tags authorized for each service class of the terminal; Generating an MBS GTEK value for decryption of upper layer name tags authorized for each service class of the terminal by using the parameter; A unicast flow includes a mapping table response message of a MAC layer name tag or an IP layer name tag vs. an upper layer name tag including the extracted mapping table and the generated MBS GTEK value. The method comprising the step of transmitting to the terminal via). The method of claim 13, The MBS service authentication request message includes a network access identification (NAI). The method of claim 13, The MBS service authentication response message includes a random seed value for generating the MBS General Traffic Encryption Key (GTEK), a GTEK key lifetime value for indicating the validity period of the GTEK value, and a terminal for each initial access. MBS root key and MBS KEK (Key Encryption Key) value generated in AAA server, MBS root key and MBS KEK (Key Encryption Key) to encrypt MBS GTEK At least one of a UE unique random seed value, a key lifetime to inform the valid period of the MBS root key and the MBS KEK value, and the subscriber's MBS service class information. A method comprising one. The method of claim 10, The mapping table response message includes a mapping table for upper layer name tags authorized for each service class of the terminal, an MBS GTEK (General Traffic Encryption Key) for encrypting / decrypting MBS content of the terminal, A unique random seed value for enabling internal generation of an MBS root key and an MBS key encryption key (KEK) for encrypting the MBS GTEK, the MBS Key lifetime value of GTEK or MBS root key and MBS KEK, MBS zone ID, traffic information, broadcast time zone information, information on whether or not the MAC layer name tag is a global unique value for national broadcasting channel, subscriber And at least one of the MBS service class information of the. The method of claim 10, The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). The method of claim 10 , The upper layer name tag may include at least one of a broadcast channel IP, a content ID, and a broadcast channel ID. The method of claim 10, The IP layer name tag is a broadcast channel multicast IP. The method of claim 10, And receiving ACK / NACK for the mapping table response message from the terminal. The method of claim 20, When the NACK is received from the terminal, retransmitting the corresponding mapping table response message. In the apparatus for transmitting a mapping table for a multicast and broadcast service (hereinafter referred to as "MBS") in a broadband wireless access system, When a request is received for a mapping table of MAC layer name tags or IP layer name tags to upper layer name tags, a multicast and broadcast service is provided through a unicast flow. and Broadcast Service (hereinafter referred to as 'MBS') sends a mapping table request message of a MAC layer name tag or an IP layer name tag to a higher layer name tag to a content server, and the MBS content server. From the MBS zone to which the terminal itself belongs or all the MBS zones allowed for the terminal itself through the unicast flow from the MAC layer name tag or IP layer name tag (vs) of the upper layer name tag Receive a mapping table response message of a MAC layer name tag or IP layer name tag to upper layer name tag including a mapping table. The terminal and, When the mapping table request message is received through the unicast flow from the terminal, a MAC layer name tag corresponding to the MBS zone to which the terminal belongs or all MBS zones allowed for the terminal (or user) in a database. Or search the mapping table of the IP layer name tag vs. the upper layer name tag, and check the MAC layer name tag or IP layer name tag including the searched mapping table. vs) the MBS content server for transmitting a mapping table response message of an upper layer name tag to the terminal through a unicast flow. The method of claim 22, And the mapping table request message or the mapping table response message is transmitted and received using HTTP (HyperText Transfer Protocol) or an interoperable protocol. The method of claim 22, From the searched mapping table, the mapping table for the upper layer name tags authorized for each service class of the terminal is extracted, and an accounting authentication authorization (hereinafter referred to as 'AAA') and MBS service authentication process are performed. And generating an MBS GTEK (General Traffic Encryption Key) value for decryption of authorized upper layer name tags for each service class of the terminal by using the parameter received from the AAA through the above process, and extracting the extracted information. The MBS content server for generating a mapping table response message of a MAC layer name tag or an IP layer name tag vs. an upper layer name tag including the generated mapping table and the generated MBS GTEK value; And the AAA for performing authentication of the terminal. The method of claim 22, The mapping table response message includes a mapping table for upper layer name tags authorized for each service class of the terminal, an MBS GTEK (General Traffic Encryption Key) for encrypting / decrypting MBS content of the terminal, A unique random seed value for enabling internal generation of an MBS root key and an MBS key encryption key (KEK) for encrypting the MBS GTEK, the MBS Key lifetime value of GTEK or MBS root key and MBS KEK, MBS zone ID, broadcasting time zone information, information on whether or not the MAC layer name tag is a global unique value for national broadcasting channel, traffic information, subscriber At least one of the MBS service class information of the apparatus. The method of claim 22, wherein the terminal, When the application of a specific broadcast channel is detected, the mapping table is managed, and the MAC layer name tag for the corresponding broadcast channel is transmitted to the MAC / PHY layer to thereby generate a data burst corresponding to the corresponding MAC layer name tag. Instructs reception and decoding to transmit to a higher layer, and when a change of a specific broadcast channel is detected, a new MAC layer name tag is transmitted to the MAC / PHY layer, thereby receiving a reception for the current broadcast channel. An upper layer instructing to stop, to receive, decode, and transmit a burst of data corresponding to a new MAC layer name tag to a higher layer; And the MAC / PHY layer for receiving and decoding a data burst corresponding to a corresponding MAC layer name tag from a base station according to the indication and transmitting the burst to a higher layer. The method of claim 22, wherein the terminal, When the deletion of a specific broadcast channel is detected and the mapping table is managed, the MAC layer name tag for the corresponding broadcast channel is transmitted to the MAC / PHY layer, whereby a data burst corresponding to the corresponding MAC layer name tag is generated. An upper layer instructing to stop receiving, And the MAC / PHY layer for stopping reception of a data burst corresponding to a corresponding MAC layer name tag from a base station according to the indication. The method of claim 22, wherein the terminal, MAC / receiving and decoding all MBS data bursts from the base station and transmitting all decoded data or only data corresponding to MAC layer name tags instructed to be transmitted from a higher layer to a higher layer. PHY layer, And managing the mapping table, wherein the upper layer selects only broadcast channels having a MAC layer name tag or an IP layer name tag corresponding to a required upper layer name tag among data received from the MAC / PHY layer. Device. The method of claim 28, All MAC layer name tags belonging to the base station are obtained by reading all MBS map (MAP) messages belonging to the base station, received from the base station through a downlink channel descriptor (DDC) message, or according to the request of the upper layer. A device characterized in that received through one DSA (Dynamic Service Addition) procedure or a continuous DSA procedure as many as MAC layer name tag number. The method of claim 22, The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). The method of claim 22, And the upper layer name tag includes at least one of broadcast channel IP, content ID, and broadcast channel ID. The method of claim 22, The IP layer name tag is a broadcast channel multicast IP. The terminal of claim 22, wherein the terminal is And send an ACK / NACK for the mapping table response message to the MBS content server. The method of claim 22, wherein the MBS content server And updating the mapping table in consideration of a MBS GTEK refresh time. An apparatus for transmitting a mapping table for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a broadband wireless access system, A mapping table data burst packet is generated and transmitted in a multicast broadcast flow or broadcast flow at a corresponding period, and location and size information of a MAC layer name tag data burst for transmitting the generated packet is transmitted to a base station. MBS content server or base station controller, When location and size information of a specific MAC layer name tag data burst for transmission of the mapping table is received, an MBS map (MAP) message including the information is generated, and the generated MBS map (MAP) message is generated. And the base station transmitting a downlink map (DL-MAP) message indicating a two-dimensional allocation position of the terminal to the terminal. 36. The method of claim 35 wherein The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). A method of delivering a mapping table for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a broadband wireless access system, MBS content server or base station controller generates mapping table data burst packets and transmits them in a multicast broadcast flow or broadcast flow in a corresponding period, and the location and size of the MAC layer name tag data burst that delivers the generated packets. ) Transmitting the information to the base station, The base station generates an MBS map (MAP) message including the information, and transmits a downlink map (DL-MAP) message indicating a two-dimensional allocation location of the generated MBS map (MAP) message to the terminal Process comprising a process. The method of claim 37, wherein The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). A method of managing a mapping table for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a terminal of a broadband wireless access system, When the serving base station is changed, checking whether the same MBS zone ID is received from the new base station; When receiving a different MBS zone ID than before, checking whether the MAC layer name tag is a unique value for national broadcasting; Checking the mapping table of the corresponding MBS zone using the MBS zone ID of the new base station when the MAC layer name tag is a unique value; And if the same MAC layer name tag as the MAC layer name tag for the existing broadcast channel exists in the mapping table, continuously receiving MBS content using the corresponding MAC layer name tag. The method of claim 39, And deleting the existing broadcast channel when the same MAC layer name tag as the MAC layer name tag for the existing broadcast channel does not exist in the corresponding mapping table. The method of claim 39, If the MAC layer name tag is not a unique value, the method further comprising the step of deleting the existing broadcast channel. The method of claim 39, If the same MBS zone ID is received, the method further comprising the step of continuing to receive the MBS content through the base station. The method of claim 39, And if the new base station is not a base station providing MBS, displaying on the display that it is not a broadcast reception area. The method of claim 39, And the mapping table is a mapping table of MAC layer name tags to upper layer name tags. The method of claim 44, The upper layer name tag may include at least one of a broadcast channel IP, a content ID, and a broadcast channel ID. The method of claim 39, The MAC layer name tag includes at least one of a multicast connection ID (MCID) and a logical channel ID (Logical CID). A method of managing a mapping table for a multicast and broadcast service (hereinafter, referred to as 'MBS') in a terminal of a broadband wireless access system, When the serving base station is changed, checking whether the same MBS zone ID is received from the new base station; When the MBS zone ID different from the previous one is received, checking the mapping table of the corresponding MBS zone by using the MBS zone ID of the new base station; And when the same IP layer name tag as the IP layer name tag for the existing broadcast channel exists in the mapping table, continuously receiving MBS content using the corresponding IP layer name tag. The method of claim 47, And deleting the existing broadcast channel when the same IP layer name tag as the IP layer name tag for the existing broadcast channel does not exist in the mapping table. The method of claim 47, If the same MBS zone ID is received, the method further comprising the step of continuing to receive the MBS content through the base station. The method of claim 47, And the mapping table is a mapping table of IP layer name tags to upper layer name tags. 51. The method of claim 50, The upper layer name tag may include at least one of a broadcast channel IP, a content ID, and a broadcast channel ID. The method of claim 47, The IP layer name tag is a broadcast channel multicast IP. The method of claim 47, And if the new base station is not a base station providing MBS, displaying on the display that it is not a broadcast reception area.

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