TWI388228B - Supporting handover of mobile terminal - Google Patents

Description

Method of supporting handover of mobile terminal

The present invention relates to communication information for media independent delivery (MIH), and more particularly to the delivery of a support mobile terminal.

Broadband wireless access systems in accordance with the prior art will generally be described below. Unlike the conventional 2G and 3G mobile communication systems, the IEEE 802.16e system for international standardization of broadband wireless access systems is in progress, and it does not have a hierarchical structure, which is used for a local location. A register (HLR), a visitor location register (VLR), a mobile switching center (MSC), a base station controller (BAS), a radio network controller (RNC), and the like. However, the IEEE 802.16e system includes a mobile subscriber station (MSS) as a mobile terminal, a base station (BS), and an authentication service authorization (ASA) as an authentication management server. In addition, a common physical layer (PHY) and a media access control (MAC) layer are defined between the base station and the mobile subscriber station.

Figure 1 is a diagram of a frame structure for an orthogonal frequency division multiple access (OFDMA) physical layer in a broadband radio access system. Referring to Figure 1, the downlink subframe is started with a syntax for synchronization and equalization in the physical layer. Then, the foregoing defines the location of the burst allocated to the downlink and uplink, and the usage of the broadcast formatted downlink mapping (DL-MAP) message and the frame control header (FCH). . An uplink mapping (UL-MAP) message follows the DL-MAP and FCH to define the structure of the entire frame.

Examples of DL-MAL and UL-MAP messages are shown in Tables 1 and 2, respectively.

In the burst mode entity layer, the DL-MAP message defines the usage of the bursts allocated to the downlink interval, and the UL-MAP defines the usage of the bursts allocated to an uplink interval. For the information element of the DL-MAP message (as shown in Table 3), the downlink traffic interval is at the user end by the downlink interval usage code (DIUC), a connection identifier (CID), and Identification of burst location information (such as secondary channel offset, symbol offset, secondary channel number, and symbol number). For information elements that configure UL-MAP messages (as shown in Table 4), usage is determined by each Connection Identifier (CID) - Uplink Interval Usage Code (UIUC). The position of a corresponding interval is adjusted by duration. In this case, each interval is used in accordance with a UIUC value used in the UL-MAP. Each interval begins at a point some distance from the start of one of the previous information elements (IE) adjusted by the UL-MAP IE.

The frame control header (FCH) before the DL-MAP is a header indicating the coded information and a DL-MAP length. Table 5 shows the frame structure of the FCH.

Table 6 shows an example of a neighbor advertisement (MOB_NBR-ADV) message as a broadcast message of a neighboring base station. A base station periodically broadcasts information about neighboring base stations via MOB_NBR-ADV messages. A mobile subscriber station receives the message and references it for scanning and delivery.

Tables 7 and 8 are specific embodiments of a basic capability request (SBC-REQ) message and a basic capability response (SBC-RSP) message, respectively. The mobile subscriber station that has received the DL-MAP and UL-MAP performs ranging for a network access procedure and transmits an SBC-REQ message to the base station to initiate a negotiation for basic capabilities. In order to negotiate, the base station sends a SBC-RSP message about the part that matches its performance.

Once the negotiation for the basic capabilities is completed, the mobile subscriber station performs a registration procedure via a registration request (MOB-REG-REQ) message and a registration response (MOB-REG-RSP) message. Tables 9 and 10 show examples of MOB-REG-REQ and MOB-REG-RSP messages, respectively.

Media Independent Submission (MIH) technology will now be explained. The purpose of the IEEE 802.21 system (for international standardization of heterogeneous network media independent delivery) is to enhance the user convenience of mobile terminal devices by providing seamless delivery and service continuity between heterogeneous networks. An MIH function, event triggering, command service, and information service (IS) are defined as the basic requirements of the IEEE 802.21 system.

A mobile subscriber station supports multiple nodes of at least one interface type, one of which can be implemented in various types. Possible interface types include a wire type interface such as IEEE 802.3, a wireless interface type based on IEEE 802.XX (including IEEE 802.11, IEEE 802.15, IEEE 802.16 or the like), and cell standardization such as 3GPP and 3GPP2. The interface defined by the organization.

Figure 2 is an exemplary diagram of a multi-mode mobile subscriber station. Referring to FIG. 2, a multi-mode mobile subscriber station includes each Modular Physical Layer (PHY) and each Modular Media Access Control (MAC) layer. In addition, an MIH layer is placed under the IP layer.

Media Independent Submission (MIH) is defined between IEEE 802 series interfaces and the like, or between an IEEE 802 series interface and a non-IEEE 802 series interface (eg, 3GPP or 3GPP2 interface). Similarly, an mobility support agreement and a SIP Initial Agreement (SIP), such as the upper layer of the Mobile IP, are supported for seamless delivery of services.

The following describes the network registration procedure in initializing a broadband wireless access system. Figure 3 is a flow chart of the mobile station initialization procedure in a broadband wireless access system. Referring to FIG. 3, once the switch of the mobile subscriber station is turned on, the mobile subscriber station searches for the downlink channel and obtains uplink/downlink synchronization with a base station via a DL-MAP and a UL-MAP (1). ). The mobile subscriber station adjusts the uplink transmission parameters by RNG-REQ and RNG-RSP messages by ranging with the base station, and the base station allocates a basic management connection identifier (CID) and a primary management CID to the mobile subscriber station ( 2). The mobile subscriber station then negotiates a basic capability (3) with the base station via the SBC-REQ and SBC-RSP messages. After that, the authorization is implemented on the mobile subscriber station (4). The mobile subscriber station then performs a registration procedure to the base station via the REG-REQ and REG-RSP messages, wherein the base station will assign the management CID to the mobile subscriber station (5) managed by an Internet Protocol (IP). Once the IP connection (6) is generated, a current date and time (7) is set. The configuration file (8) of the mobile subscriber station is then downloaded from a Simple File Transfer Protocol (TFTP) server and a connection (9) for the prepared service is generated.

In Media Independent Submission (MIH), an MIH function is placed under an IP layer and implements a delivery process that uses one of the triggering events and an input value from a second layer (layer 2), such as other networks. And similar information. MIH functions may include input values based on user policies and configurations that may affect the delivery process. The generic interface is defined between the MIH function and a Layer 3 (Layer 3) entity, such as a Mobile Internet Protocol (Mobile IP) and a Session Initiative (SIP). These interfaces provide information about a first layer (physical layer), a second layer (layer 2; MAC layer), and mobility management. MIH has access to information on the underlying and one network with the assistance of the event and information services. Therefore, the MIH function should be placed at a higher level to monitor and control the status of other links within the mobile subscriber station. Figure 4 is a diagram of a functional entity and a transport protocol including a MIH function and a terminal of the network, wherein the dotted line indicates a primitive, an event trigger, and the like.

The following explains an event trigger for submitting between heterogeneous networks. For fast delivery, a network layer needs to use information from a link layer to re-establish a connection as early as possible. A link layer event assists in estimating the motion of a user and assists the mobile subscriber station and the network in preparing for delivery. A trigger for delivery can begin with a physical layer (PHY) and a medium access control layer (MAC). The origin of this trigger can be a local stack or a remote stack. Figure 5 is a diagram of a trigger model.

An event trigger provides the status of the current signal, the state change of the other network, and the estimated change. The event trigger also provides information about changes between the physical layer and the media access control layer and changes in attributes of a particular network. Event types can be classified as follows: (1) PHY layer events; (2) MAC layer events; (3) management events; (4) L3 events; and (5) application events.

The basic triggering event will now be explained. A "Link_Up" trigger event occurs when a layer 2 (L2) connection is established between a particular link interface and when a layer 3 (L3) message can be transmitted from a higher layer. In this case, it is determined that all L2 configurations configuring the link have been completed. The origin of the event is a local MAC and a remote MAC. The parameter is shown in Table 11.

A "Link_Down" trigger event occurs when an L2 connection is released on a particular link interface and when it is no longer necessary to transmit an L3 packet. The origin of an event is a local MAC. The parameter is shown in Table 12.

[Table 12]

A "Link Going Down" trigger event occurs when it is estimated that an L2 connection will be downlinked within a specified time. The "Link Going Down" trigger event can be a signal used to initialize the delivery process. The origin of the event is a local MAC and a remote MAC. The parameter numbers are shown in Table 13.

A "Link Going Up" trigger event occurs when it is estimated that an L2 connection will be uplinked within a specified time. The "Link Going Up" trigger event is used when the network to be initialized takes a long time. The origin of the event is a local MAC and a remote MAC. The parameter numbers are shown in Table 14.

A "Link_Available" trigger event indicates that a new specific link is available or available. Furthermore, the "Link_Available" event indicates that a new base station or access point (AP) or point of attachment (POA) can provide a better quality than a base station or AP or POA currently accessed by a mobile subscriber station. The possibility of the road. The origin of the event is a local MAC and a remote MAC. The parameter numbers are shown in Table 15.

An information service for the submission of heterogeneous networks will now be explained. The Media Independent Information Service (MIIS) provides a similar frame network on a heterogeneous network to facilitate the search and selection of various types of emerging networks. That is, Media Independent Information Services (MIIS) provides detailed information about a network that needs to be searched and a network that should be accessible from any type of network. The Media Independent Information Service (MIIS) should include the following information elements such as link access parameters, security mechanisms, neighbor mapping, location, provider and other access information, link costs, and the like.

Figure 6 is a flow chart of a procedure for obtaining an information service according to the related art. Referring to FIG. 6, an MIH of a mobile subscriber station (MS) transmits an MIH_info.request message to its MAC to request an information service (S610). The MAC of the mobile subscriber station then transmits an information request frame to a base station (BS) (S620). One of the base stations, the MAC, transmits the information request from the mobile subscriber station to its MIH via the MIH_info.indication message (S630). The base station MIH then passes a reserved media independent information service to the MAC layer via a MIH_info.response message (S640). This causes the base station's MAC to send a message response frame in response to the mobile subscriber station (S650). The MAC of the mobile subscriber station receives the information response frame and transmits the content of the received information service to its MIH via a MIH_info.confirm message (S660).

However, in the related art of the broadband wireless access system, an attempt is made to submit to a multi-mode mobile subscriber station of a broadband wireless access system from another interface network (eg, IEEE 802.11, 3GPP, or 3GPP2). A mobile subscriber station of another base station in the same broadband radio access system, or an active subscriber station that performs an initial network access procedure in a base station of a broadband radio access system, cannot know a base. Whether the MIH capability of Taiwan is available. Therefore, there is a need for an invention that solves the problems of the related art.

The present invention relates to the delivery of a support mobile terminal.

Additional features and advantages of the invention will be set forth in part in the description which follows. The objectives and other advantages of the invention may be realized and attained by the structure of the invention.

To achieve these and other advantages and in accordance with the purpose of the present invention (as encompassed and broadly described herein), the present invention is embodied in a method of supporting the delivery of a mobile terminal, the method comprising performing a scan and an action terminal The current adjacent network of the network determines the appearance of an accessible link for implementing the submitted neighboring network, wherein the mobile terminal includes a heterogeneous network delivery module, and the module is configured Converging information from at least one network interface module associated with a homogeneous and heterogeneous network into a unified representation and receiving an information message from a neighboring network, wherein the information message includes An information element that relates to whether the neighboring network can communicate with the heterogeneous network delivery module of the mobile terminal.

In one aspect of the invention, if the neighboring network has a heterogeneous network delivery capability, the mobile terminal communicates with the neighboring network using the media access control management message. In another aspect of the invention, the method further includes providing a scan request from the heterogeneous network delivery module to a broadband wireless access network interface prior to performing the scanning.

Preferably, the information message is received through the media access control of the broadband wireless access network interface and communicates with the heterogeneous network delivery module. Preferably, the information message from the adjacent network further includes at least one of an information service support indicator, an event service support indicator, and a command service support indicator. Preferably, the information message is a broadcast message, a frame check header message, a registration response message, a subscriber base basic capability response message, and an adjacent base station broadcast message.

Preferably, the information element received by the media access control of the mobile terminal is transmitted to the heterogeneous network delivery module. Preferably, the media access control communicates with the heterogeneous network delivery module via a link available message and a capability indication message.

According to another embodiment of the present invention, a method for supporting delivery of a mobile terminal includes communicating with a current network; receiving a broadcast message from a current network, including a heterogeneous network within a service base station and an adjacent Providing at least one of the heterogeneous networks in the base station; and providing the mobile terminal information associated with the heterogeneous network in the service base station and the heterogeneous network in the adjacent base station to a heterogeneous network delivery module, wherein The heterogeneous network delivery module is configured to provide aggregation of information from at least one network interface module associated with a homogeneous and heterogeneous network into a unified representation.

According to another embodiment of the present invention, a method for supporting delivery of a mobile terminal includes transmitting a request message to a current network, the message including an information element associated with whether the mobile terminal supports a heterogeneous network delivery module, The heterogeneous network delivery module is configured to provide aggregation of information from at least one network interface module associated with a homogeneous and heterogeneous network into a unified representation; and receiving a response message from the current network, The message contains an information element that relates to whether the current network can communicate with the heterogeneous network delivery module of the mobile terminal.

In another embodiment of the present invention, a method for supporting delivery of a mobile terminal includes receiving a request message from the mobile terminal, the message including an information element associated with whether the mobile terminal supports a heterogeneous network delivery module The heterogeneous network delivery module is configured to provide aggregation of information from at least one network interface module associated with a homogeneous and heterogeneous network into a unified representation; and transmitting a response message to the mobile terminal The response message includes an information element associated with whether the current network can communicate with the heterogeneous network delivery module of the mobile terminal.

In an aspect of the present invention, if the current network has a heterogeneous network delivery capability, the mobile terminal uses a media access control management message to communicate with the current network. In another aspect of the invention, the method further includes receiving a scan request from the heterogeneous network delivery module of the mobile terminal before receiving the request message.

Preferably, the response message is transmitted through a medium access control of the broadband wireless access network interface. Preferably, the response message further includes at least one of an information service support indicator, an event service support indicator, and a command service support indicator. Preferably, the response message is a broadcast message, a frame check header message, a registration response message, a subscriber base basic capability response message, and an adjacent base station broadcast message.

According to another embodiment of the present invention, a method for supporting delivery of a mobile terminal includes communicating with a mobile terminal; and transmitting a broadcast message from a current network to a mobile terminal, the broadcast message including a heterogeneous network within a service base station At least one of a heterogeneous network in the road and an adjacent base station, wherein the mobile terminal is associated with a heterogeneous network in a serving base station and a mobile terminal information of a heterogeneous network in an adjacent base station to provide A heterogeneous network delivery module, wherein the heterogeneous network delivery module is configured to provide aggregation of information from at least one network interface module associated with a homogeneous and heterogeneous network into a unified representation.

The foregoing description of the preferred embodiments of the invention and the claims

The present invention relates to the delivery of a support mobile terminal. DETAILED DESCRIPTION OF THE INVENTION Reference will now be made in detail to the preferred embodiments embodiments Wherever possible, the same reference numerals will refer to the

The present invention relates to a method for obtaining MIH capability information between a multi-mode mobile subscriber station (MSS) and a base station (BS) in a system, wherein a broadband wireless access network and a connected regional network are operated. At least one of (LAN), a wireless LAN, and a cellular network. There is no limit to the type of LAN or cellular network. For example, a wired LAN network can use an IEEE 802.X-based system, a wired LAN network can use an IEEE 802.XX-based system, and a cellular network can be standardized by, for example, 3GPP and 3GPP2. Organization-defined system.

The currently accessed base station transmits the MIH capability information to a multi-mode mobile subscriber station, so that the multi-mode mobile subscriber station can obtain the MIH capability information of a target base station belonging to the heterogeneous network that the mobile subscriber station attempts to access. There are various methods for transmitting MIH capability information. Thus, in accordance with a preferred embodiment of the present invention, different methods of transmitting MIH capability information will be explained in the following description.

According to a first embodiment of the present invention, the base station transmits an adjacent base station advertisement message (MOB-NBR-ADV) including MIH capability information.

According to a second embodiment of the present invention, the base station includes MIH capability information in a frame check header (FCH) to be transmitted. According to a third embodiment of the present invention, the base station includes MIH capability information in an information element of the DL-MAP to be transmitted.

According to the fourth embodiment of the present invention, when a multi-mode mobile subscriber station negotiates basic capability information with a base station, the MIH capability information is included in the basic capability request/basic capability response (SBC-REQ/SBC- RSP) message. In an aspect of the invention, the multi-mode mobile subscriber station and the base station negotiate with each other for mutual MIH capabilities.

According to the fifth embodiment of the present invention, when a multi-mode mobile subscriber station performs a registration procedure to the base station, the MIH capability information is included in the registration request/registration response (MOB-REG-REQ/MOB-REG- RSP) message. In an aspect of the invention, the multi-mode mobile subscriber station and the base station negotiate with each other for mutual MIH capabilities.

According to a sixth embodiment of the present invention, a mobile subscriber station obtains MIH capability information via a beacon message from the base station.

The base station can provide not only the MIH capability information about the adjacent broadband wireless access system base station to the currently accessed mobile subscriber station, but also the wireless LAN access point (AP) or the attachment point that can receive the signal. (POA) and MIH capability information of the cell base station. This can be done via a neighboring base station advertisement (MOB-NBR-ADV) broadcast message. Preferably, the message may include an information service (IS) support field indicating whether the corresponding base station and the AP or POA can provide an information service obtained from an information service (IS) server to a mobile subscriber station. . Table 16 shows an example of the format attached to the MOB-NBR-ADV message to indicate MIH capability information for a neighboring base station and a wireless LAN POA or cell system base station.

A MIH INFO bit map newly attached to the previous MOB-NBR-ADV message indicates the MIH capability of an available wireless LAN POA or cell system base station for a broadband wireless network base station that is being accessed by a mobile subscriber station And IS support. A MIH INFO bit map 2 indicates the presence or absence of MIH capabilities and IS support located at one of the heterogeneous attachment points adjacent to the adjacent broadband radio access base station (ie, the wireless LAN POA or the cellular system base station). Preferably, the MIH INFO bit map 2 may indicate information about the presence or absence of MIH capabilities and IS support for a heterogeneous attachment point located adjacent to a homogeneous neighboring base station, and an adjacent heterogeneous base station of the current base station. Contact information.

A bit to include MIH capability information of a current base station is added, and an MIH capability and an IS function indicating a current or adjacent base station can be obtained by a mobile subscriber station newly entering the current base station area. Whether the information can be provided in a manner that receives a Downlink Channel Descriptor (DCD) message. The mobile subscriber station uses the information to obtain a burst file for decoding a broadcast message, obtains the start position of the MOB_NBR-ADV message from the DL-MAP, and decodes the MOB_NBR-ADV message into a broadcast message received from the corresponding location. . An MIH unknown bit is added to the MIH INFO bit map 1 or 2 to indicate whether a base station allows MIH or does not allow the presence or absence of MIH to be unknown, that is, the capability of the base station is not confirmed. For example, if a wireless LAN POA is found to be available for MIH INFO bit map 1, and receive such information as [1] available WLAN POA, [0] available POA MIH allowed, and [1] available WLAN POAMIH unknown bit map information, despite a wireless The POA allows submissions to exist in the vicinity of the current base station, and the status of the MIH capability is unknown. Therefore, the meaning of the unallowed MIH allowed bits.

A base station can inform an mobile subscriber station of the availability of its MIH capabilities by including the information in a frame check header (FCH). Therefore, the mobile subscriber station can obtain the MIH capability information about the corresponding base station from an MIH capability information element after receiving the FCH to decode the downlink frame of the base station. In addition, the mobile subscriber station can obtain information about whether the base station can provide information services obtained from the information service (IS) server to the mobile subscriber station from an IS support information element. Table 17 shows an example of an available format in which the "MIH Capabilities" and "IS Support" information elements are attached to the FCH message. Through this format, the base station can notify a mobile subscriber station whether an MIH function and an information service can be supported to the mobile subscriber station.

[Table 17]

A base station may include the availability of its MIH capabilities in the DL-MAP message and inform a mobile subscriber station of the availability. The mobile subscriber station that has received the DL-MAP message for synchronization with the base station can obtain MIH capability information about the corresponding base station. Preferably, the base station obtains an information service from an IS server and may include an information service support field indicating whether the information service can be provided to the mobile subscriber station in the DL-MAP message. Table 18 shows an example of a format that can represent MIH capability information added to an information element (IE) included in a DL-MAP message. A MIH_Capability_IE informs the MIH capability of the network. The MIH capability can be exchanged with the BS by using the MAC management message to indicate that the MIH function message can be exchanged for the MS to access the MIH function of the network. In addition, the MIH_Capability_IE notifies the MIH service type supported by the MIH function of the current BS through the current BS. The capability of providing the MIH function of the network refers to the service that the BS can directly use the MIH function, and the BS can access the MIH functional entity via the NCMS.

The parameter is used to inform the current BS whether the MIH function service can be accessed via the NCMS. This applies to a case where the current BS has the capability of MIH function. If the parameter is set to "1", the MS can access the MIH function via the current BS, and can use the MAC management message of the associated MIH (eg, MOB_MSMIH-REQ, MOB_MSMIH-RSP, MOB_BSMIH-REQ, MOB_BSMIH-RSP) to interact with the MIH. Functional communication. An event service support parameter is used to inform the MIH function (which can use the BS access) whether to support the parameters of the event service (ES). A command service support parameter is a parameter for notifying whether the MIH function (which can use the BS access) supports the command service (CS). An information service support parameter is used to notify the MIH function (which can use the BS access) whether to support the parameters of the information service (IS). .

The TLV (Type, Length, and Value) is used to negotiate the independent delivery of associated media with a base station. In the case where the mobile subscriber station including an MIH layer performs the MIH function, the mobile subscriber station sets a corresponding bit to transmit to a base station. If the base station including an MIH layer can support this function, the base station sets the bit in a response message to be transmitted.

Regarding the information service, when attempting to receive an information service via a base station, an action subscriber station sets a corresponding bit to make a request. If the base station can provide information services to the mobile subscriber station by communicating with an information service server or by acting as an information service server, the base station can activate the subscriber station by setting the bit response Negotiation between the base stations.

Table 19 shows the MIH capability information in a TLV format in an SBC-RSP message or a REG-RSP message according to an embodiment of the present invention. As shown in Table 19, if the MS sets the corresponding bit to "1" and sends a request based on the setting, this indicates that the corresponding capability is supported by the MIH of the MS. If the BS sets the corresponding bit to "1" and therefore sends a response, this indicates that the corresponding capability is supported by the MIH function of the network containing the BS. Or, a bit setting of "0" indicates that the capability is not supported.

Preferably, bit #0 indicates whether the MIH is supported by the MS or the BS. Further, bit #1 indicates whether or not the ES is supported, bit #2 indicates whether CS is supported and bit #3 indicates whether or not IS is supported. In detail, bit #3 queries whether the BS has the ability to receive IS from the IS server, or whether the BS can implement the IS server.

In addition, bit #0 has a different indication that if this indicator is set and transmitted by the BS, the BS can access the MIH function via the NCMS, or the service of the MIH function can be provided by the BS. In addition, if the value of the indicator is set and transmitted to the MS, the indication may use MAC management messages associated with the MIH (eg, MOB_MSMIH-REQ, MOB_MSMIH-RSP, MOB_BSMIH-REQ, MOB_BSMIH-RSP).

Tables 20 and 21 show other formats that can include MIH capabilities, respectively. When a network re-entry procedure is performed by attempting to submit, or after a ranging procedure has been completed with a target base station that is to perform an initial network entry procedure, an active subscriber station can negotiate basic capabilities with the base station. The MIH capability information is included in an SBC-REQ message to be transmitted, and then the message is transmitted to the base station. Table 21 shows an example of a MIH capability field that can be included in an SBC-REQ message in a TLV format. If the MIH capability is available, a target base station transmits an SBC-RSP message by setting the MIH capability bit to one. In this case, the MIH capability bits are included in the TLV of the SBC-RSP message in the format shown in Table 20.

A mobile subscriber station may include its MIH capability information in a MOB-REG-REQ message intended to transmit a registration procedure and then transmit the message to the base station. Table 20 shows an example of displaying the MIH capability field included in the REG-REQ message in a TLV format. If the MIH capability is available, a target base station transmits a REG-RSP message by setting the MIH capability bit to one. In this case, the MIH capability bits are included in the TLV of the REG-RSP message in the format shown in Table 20.

When performing the scanning, the MAC layer of a mobile subscriber station receives a beacon message including MIH capability information from the base station. Therefore, the MAC layer of the mobile subscriber station includes this information in a Link_Available trigger and notifies the MIH of the information.

Table 22 shows a specific embodiment for including MIH capability information in a Link_Available trigger.

After receiving the DL-MAP including the MIH capability information from the base station, the MAC layer of the mobile subscriber station transmits the MIH capability information of the base station to its MIH via a "MIH_Capability.indication" primitive. A specific embodiment of the "MIH_Capability.indication" primitive will now be explained.

The function of the "MIH_Capability.indication" primitive will be explained first. The MAC layer of an active subscriber station transmits MIH capability information of a target base station to its MIH via this primitive. The primitive is then passed from the MIH to an upper management entity to pass the MIH_Capability information of a neighboring base station to the upper management entity. The upper management entity can be used to decide whether to perform the delivery to a network support MIH. In addition, the primitives can be directly passed to the upper management entity by the MAC layer. The upper management entity may use this information to determine the likelihood of delivery relative to the network to support the MIH.

The meaning of the primitive "MIH_Capability.indication" is as follows.

MIH_Capability.indication{Source, destination, LinkIdentifier, BS MIH capability, BS event service support, BS command service support, BS IS support,}

In the case of a broadband wireless access system, the "BS MIH Capability" and "BS IS Support" parameters respectively indicate the MIH capabilities of a new base station and the possibility of IS support. According to the heterogeneous media, the "BS MIH Capability" and "BSIS Support" parameters indicate the POH of a wireless LAN (IEEE 802.11) system, the Node B of a 3GPP system, or the MIH capability and IS of a base station (BTS) of the 3GPP2 system. The possibility of support.

The time for generating the "MIH_Capability.indication" primitive is explained below. If the MAC layer of an mobile subscriber station receives a beacon, DL-MAP or neighbor advertisement message containing MIH capability information of an attachment point, a primitive "MIH_Capability.indication" is generated to transmit the information to the MIH or the upper layer. Manage entities. If the MIH finds that a new network (such as IEEE802.16, IEEE802.11, 3GPP, or 3GPP2) has an MIH function or the new network support information service (IS), the "MIH_Capability.indication" primitive is generated to The information found is notified to the management entity.

The following explains the effect of receiving the primitive "MIH_Capability.indication". After receiving the primitive, the MIH or the upper management entity obtains the MIH capability information of the target base station.

In accordance with a preferred embodiment of the present invention, a method for providing base station MIH capabilities to a multi-mode mobile subscriber station in a broadband wireless access system will now be explained. In the following specific embodiments, the description is submitted from an IEEE 802.11 system to an IEEE 802.16 system. However, as disclosed in the foregoing description, the present invention is applicable to a system operating in at least one of a wideband wireless access network, a wireless LAN, and a cellular network. Therefore, it can be delivered to various wireless LANs, cellular networks or other broadband wireless access networks.

A method in accordance with an embodiment of the present invention is explained as follows. First, a base station initially includes MIH capabilities and IS (Information Service) support information in an information element (IE) of a DL-MAP, and then transmits the DL-MAP. In the method according to this embodiment of the invention, the description is submitted from a wireless LAN. Preferably, the wireless LAN operates in an IEEE 802.11 system.

Figure 7 shows a base station transmitting a UH capability information and IS support information in the DL-MAP when a multi-mode mobile subscriber station operating in an IEEE 802.11 system attempts to submit to an IEEE 802.16 system. DL-MAP, and receives an instance of DL-MAP for MAC synchronization.

Referring to Figure 7, the IEEE 80211 MAC of a Multi-Mode Mobile Subscriber Station (MSS) measures the quality of the currently connected link by periodic or request scanning. If the quality of the currently connected link has been degraded, a "Link_Going_Down" trigger is transmitted to the MIH of the MSS (S710). After searching for a new link, the IEEE 802.16 MAC of the MSS transmits a "Link_Available" trigger to the MIH of the MSS (S720). The 802.16 MAC of the MSS then receives and decodes the DL-MAP, which is transmitted for each frame. The MSS 802.16MAC obtains MIH capability information and IS support information (S730) of a target base station from the DL-MAP. Thereafter, the 802.16MAC of the MSS transmits the MIH capability and IS support information of the target base station to the MIH of the MSS via a "MIH_Capability_indication" primitive (S740).

In a multi-mode mobile subscriber station attempting to hand over from an IEEE 802.16 base station to another IEEE 802.16 base station, or an initial network entry procedure is performed by initiating a multi-mode mobile subscriber station in an IEEE 802.16 base station. In this case, MIH capabilities and IS support information can be obtained via a DL-MAP according to the example of FIG.

The method according to another embodiment of the present invention is explained below. Preferably, when the mobile subscriber station negotiates basic capabilities with a base station, MIH capability information and IS support information are obtained via SBC-REQ and SBC-RSP messages.

In this particular embodiment of the invention, a wireless LAN, a broadband wireless access network, and a wireless LAN are delivered to a cellular network. Preferably, the wireless LAN is an IEEE 802.11 system.

Figure 8 shows that when attempting to submit to an IEEE 802.16 system and negotiating basic capabilities with a base station, a multi-mode mobile subscriber station currently operating in the IEEB 802.11 system obtains MIH capability information via SBC-REQ and SBC-RSP messages and Examples of IS support information.

Referring to FIG. 8, if the quality of the link currently connected by the mobile subscriber station (MSS) is degraded, one of the MSS IEEE 802.11 MACs transmits a "Link_Going_Down" trigger to the MIH of the MSS (S810). After searching for a new link, the IEEE 802.16 MAC of the MSS transmits a "Link_Available" trigger to the MIH of the MSS (S820). The MSS then receives a DL-MAP from a base station and performs MAC synchronization (S830). Thereafter, the MSS receives a UL-MAP from the base station (S840). Thereafter, the MSS transmits an RNG-REQ message (S850) to the base station, and the base station transmits an RNG-RSP message in response (S860).

After receiving the RNG_RSP message, the MSS includes its MIH capability information in the SBC-REQ message to be used for negotiating basic capabilities, and transmits the message to the base station (S870). In response, the base station includes its MIH capabilities and IS support information in an SBC-RSP message and sends the corresponding message to the MSS (S880). The MSS includes the MIH capability information of the base station in a primitive "M_Basic_Capability_Nego.confirmation" and sends it to the MIH of the MSS (S890). Therefore, the MIH of the multi-mode mobile subscriber station can identify whether the base station supports an MIH function and an information service function. It should be noted that in steps S830 to S880, a primitive transmitted between the IEEE 802.16 MAC and the MIH of the mobile subscriber station, and another primitive transmitted between the IEEE 802.16 MAC and the MIH of the base station are omitted.

In a multi-mode mobile subscriber station attempting to hand over from an IEEE 802.16 base station to another IEEE 802.16 base station, or an initial network entry procedure is performed by initiating a multi-mode mobile subscriber station in an IEEE 802.16 base station. In this case, MIH capabilities and IS support information can be obtained via SBC-REQ and SBC-RSP messages in accordance with the specific embodiment of FIG.

A method in accordance with another embodiment of the present invention is explained below. Preferably, when a mobile subscriber station performs a registration procedure for a base station, MIH capability information and IS support information are obtained via REG-REQ and REG-RSP messages.

In this particular embodiment of the invention, a wireless LAN, a broadband wireless access network, and a wireless LAN are delivered to the cellular network. Preferably, the wireless LAN is an IEEE 802.11 system.

Figure 9 shows that when attempting to submit to an IEEE 802.16 system and performing a registration procedure for a base station, a multi-mode mobile subscriber station currently operating in an IEEE 802.11 system obtains MIH capability information via REG-REQ and REG-RSP messages and Examples of IS support information.

Referring to Figure 9, an IEEE 802.11 MAC of a Multi-Mode Mobile Subscriber Station (MSS) measures the quality of the link currently connected by the MSS by periodic or request scanning. If the quality of the currently connected link is degraded, the IEEE 802.11 MAC of the MSS transmits a "Link_Going_Down" trigger to the MIH of the MSS (S901). After searching for a new link, the IEEE 802.16 MAC transmits a "Link_Available" trigger to the MIH of the MSS (S902). The MSS then receives a DL-MAP from a base station (BS) and performs MAC synchronization (S903). Thereafter, the MSS receives a UL-MAP from the base station (S904). Thereafter, the MSS transmits an RNG-REQ message (S905) to the base station, and the base station transmits an RNG-RSP message in response (S906).

The MSS then transmits an SBC-REQ message to the base station to negotiate basic capabilities (S907), and the base station transmits an SBC-RSP message in response (S908). After receiving the SBC-RSP message from the base station, the mobile subscriber station includes its MIH capability information in the REG-REQ message to be transmitted for performing the registration procedure, and transmits the message to the base station (S909). Therefore, the base station includes its MIH capability and IS support information in a REG-RSP message, and sends a message to the MSS to respond (S910).

After receiving the REG-RSP message from the base station, the mobile subscriber station transmits the primitive "M_Registration.confirmation" containing the MIH capability information of the base station to its MIH (S911). Through this, the MIH of the multi-mode mobile subscriber station can identify whether the base station supports an MIH and information service function. In steps S903 to S910, a primitive transmitted between the IEEE 802.16 MAC and the MIH of the mobile subscriber station, and another primitive transmitted between the IEEE 802.16 MAC and the base station MIH are omitted in a multi-mode mobile subscriber station attempting to An IEEE 802.16 base station is handed over to another IEEE 802.16 base station, or an initial network entry procedure is performed by initiating a multi-mode mobile subscriber station in an IEEE 802.16 base station. MIH capabilities and IS support information may be Obtained via the REG-REQ and REG-RSP messages in accordance with the specific embodiment of FIG.

A method in accordance with another embodiment of the present invention is explained below. In this particular embodiment of the invention, a wireless LAN, a broadband wireless access network, and a wireless LAN are delivered to a cellular network. Preferably, the wireless LAN is an IEEE 802.11 system. Preferably, a mobile subscriber station receives a broadcast message containing MIH capability from a base station.

Figure 10 shows a multi-mode mobile subscriber station (MSS) currently operating in an IEEE 802.11 system obtaining MIH capability information via broadcast messages from an IEEE 802.16 base station (BS). The MSS includes the information in a "Link_Available" trigger for the MIH to be transmitted to the MSS, and transmits the trigger when another interface is scanned because the signal of the current link is degraded.

Referring to FIG. 10, the IEEE 802.11 MAC of a multi-mode mobile subscriber station measures the quality of the link currently connected by the MSS by periodic or request scanning. If the quality of the currently connected link is degraded, a "Link_Going_Down" trigger is transmitted to the MIH of the MSS (S1010). A higher management entity or MIH of an MSS then directs the IEEE 802.16 MAC of the MSS to perform a scan to search for an available or available base station (S1020). The IEEE 802.15 MAC performing the scanning process receives a broadcast message from an IEEE 802.16 base station (S1030). Thereafter, the IEEE 802.16 MAC transmits the MIH capability information included in the broadcast message to the MIH of the MSS via "Link_Available" (S1040).

In a multi-mode mobile subscriber station attempting to hand over from an IEEE 802.16 base station to another IEEE 802.16 base station, or an initial network entry procedure is performed by initiating a multi-mode mobile subscriber station in an IEEE 802.16 base station. In this case, MIH capabilities and IS support information can be obtained via SBC-REQ and SBC-RSP messages in accordance with the specific embodiment of FIG.

A method in accordance with another embodiment of the present invention is explained below. First, a base station includes its MIH capability information and information service (IS) support information in a neighbor advertisement (MOB_NBR-ADV) message and transmits the message. An action user obtains the information and uses it to decide whether to perform the submission.

Referring to FIG. 11, a multi-mode mobile subscriber station currently operating in an IEEE 802.11 system performs a scanning process for another interface network due to degradation of the signal quality of the current link. When scanning, the multi-mode mobile subscriber station obtains MIH capability information by receiving a neighbor advertisement (MOB_NBR-ADV) message transmitted from an IEEE 802.16 base station (BS). The MSS then passes the MIH capability information and IS support information of the target base station to its MIH via a MIH_Capability.indication primitive. Preferably, this primitive can be passed to an upper management entity. In the case of obtaining MIH capability information during the self-scanning process, the MIH capability information obtained from the MOB_NBR-ADV message can be transmitted to the MIH of the MSS via a "Link_Available" trigger.

The IEEE 802.11 MAC of a multi-mode mobile subscriber station measures the quality of the currently accessed link by periodic or request scanning. If the quality of the currently accessed link is degraded, a "Link_Going_Down" trigger is transmitted to the MIH of the MSS (S1101). After searching for a new link, the IEEE 802.16 MAC transmits a "Link_Available" trigger to the MIH of the MSS (S1102).

Thereafter, the IEEE 802.16 MAC of the MSS receives a DL-MAP and decodes it, which is transmitted from the base station to each frame (S1103). In addition, the IEEE 802.16 MAC checks the interval to see when the Link Channel Descriptor (DCD) is transmitted (S1105). The mobile subscriber station that has received the DCD can obtain a burst profile for encoding a broadcast message by the current base station. Therefore, the mobile subscriber station can use the burst profile to decode the received broadcast message. By receiving the DL-MAP (S1106), the MSS can check when a neighbor advertisement (MOB_NBR-ADV) message is transmitted to receive the message. The MIH capability information and the IS support information of the base station are currently obtained by decoding the received neighbor advertisement (MOB_NBR-ADV) message using the downlink burst profile obtained by the DCD (S1107). The mobile subscriber station then transmits the current base station MIH capability information and IS support information to its MIH via a "MIH_Capability.indication" primitive, wherein the primitive can be passed to the upper management entity (S1108).

In the case of attempting to transfer from an IEEE 802.16 base station to another IEEE 802.16 base station, or an initial network entry procedure is performed by launching a multi-mode mobile subscriber station in an IEEE 802.16 base station, the multi-mode The mobile subscriber station can obtain MIH capabilities and IS support information via the MOB_NBR-ADV message in accordance with the specific embodiment shown in FIG.

Accordingly, the present invention provides the following advantages. First, a multi-mode mobile subscriber station attempts to submit from another interface network (such as IEEE 802.11, 3GPP, 3GPP2) to a broadband wireless access system, and an active subscriber station attempts to submit to another of the same broadband wireless access systems. The base station, or a mobile subscriber station, performs an initial network entry procedure in a base station's broadband wireless access system, thereby attempting to connect to the base station to obtain the MIH capability and IS support information of a target base station, thereby facilitating Identify the capabilities of the target base station to which the associated media is independently submitted.

The foregoing specific embodiments and advantages are merely exemplary and are not considered as limiting. It is easy to apply current teachings to other types of devices. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Those skilled in the art will be aware of many alternatives, modifications, and variations. In the context of the patent application, the sentence of the component plus function is intended to cover the structure in which the function recited is performed, and is not only structurally equivalent but structurally equivalent.

The accompanying drawings, which are included in the claims Features, elements, and aspects of the present invention, which are referenced in the various figures, are the same, equivalent, or similar features, elements or aspects in accordance with one or more embodiments.

Figure 1 is a block diagram of an orthogonal frequency division multiple access (OFDMA) physical layer in a broadband radio access system.

Figure 2 is a diagram of a stacking structure of a multi-mode mobile subscriber station.

Figure 3 is a flow chart of the network registration procedure when initializing the broadband wireless access system.

Figure 4 is a functional entity diagram of a mobile terminal including an MIH function and a network.

Figure 5 is a diagram of a trigger model.

Figure 6 is a flow chart of a procedure for obtaining an information service in accordance with the related art.

Figure 7 is a flow diagram of a method for transmitting a MIH capable DL-MAP message from a base station in accordance with an embodiment of the present invention.

Figure 8 is a flow diagram of a procedure for obtaining MIH capability information for a base station via a basic capability negotiation request and response message in accordance with an embodiment of the present invention.

Figure 9 is a flow diagram of a procedure for obtaining MIH capability information for a base station via a registration request and response message in accordance with an embodiment of the present invention.

Figure 10 is a flow diagram of a procedure for obtaining MIH capability information via a broadcast message of a base station in accordance with an embodiment of the present invention.

11 is a flow chart of a procedure for obtaining MIH capability information and indicating whether to support information of an information service via a neighbor advertisement (MOB_NBR-ADV) message according to an embodiment of the present invention.

Claims (9)

A method for supporting delivery of a mobile terminal, the method comprising: transmitting a request message to a base station, the request message comprising: media independent delivery (MIH) capability information, the media independent delivery (MIH) capability information indicating: Whether the mobile terminal supports an MIH function associated with the delivery between the heterogeneous network; and receives a response message from the base station in response to the request message, the response message including: Media Independent Submission (MIH) capability information, The Media Independent Submission (MIH) capability information indicates whether the current network supports the MIH function associated with the delivery between the heterogeneous networks, wherein the request message is transmitted during an initial network entry procedure for use with The base station's capability negotiation, and the response message is received during the initial network entry procedure for the capability negotiation. The method of claim 1, wherein the response message further comprises: at least one of an information service support indicator, an event service support indicator, and a command service support indicator. The method of claim 1, wherein the request message is a basic capability request (SBC-REQ) message, and the response message is a basic capability response (SBC-RSP) message. A method of supporting delivery of a mobile terminal, the method comprising: Receiving a request message from the mobile terminal, the request message includes: Media Independent Delivery (MIH) capability information indicating whether the mobile terminal supports association with a delivery between heterogeneous networks An MIH function; and transmitting a response message to the mobile terminal in response to the request message, the response message comprising: Media Independent Submission (MIH) capability information, the Media Independent Submission (MIH) capability information indication: the base station Whether to support the MIH function associated with the delivery between the heterogeneous networks, wherein the request message is transmitted during an initial network entry procedure for negotiation with the capabilities of the base station, and the response message is This initial network entry procedure is received for this capability negotiation. The method of claim 4, wherein if the base station supports the MIH function, the mobile terminal communicates with the base station using a media access control management message. The method of claim 4, further comprising: receiving a scan request from the mobile terminal through a broadband wireless access network interface before receiving the request message. The method of claim 4, wherein the response message is transmitted through one of the broadband access network interfaces. For example, the method described in claim 4, wherein the response message is more The method includes: at least one of an information service support indicator, an event service support indicator, and a command service support indicator. The method of claim 4, wherein the response message is a broadcast message, a frame check header message, a registration response message, a subscriber base basic capability response message, and a neighbor base station broadcast message. One of them.