KR20020057292A - Method of transmission message with mobile IP in ALL-IP network - Google Patents

Abstract

PURPOSE: A method for transferring mobile IP(Internet Protocol) associated messages in an ALL-IP network is provided so that a mobile node can receive an IP associated message, or an advertisement message, sent from an FA(Foreign Agent) or an HA(Home Agent), using a signal message when the mobile node is under the coverage of the FA or the HA. CONSTITUTION: A PDSN(Packet Data Service Node) creates an advertisement message about information associated with an FA or an HA(101) and transmits the created message(102). If the advertisement message is received to a BTS(Base station Transceiver Subsystem) through a BSC(Base Station Controller)(103), the BTS broadcasts the advertisement message using a paging channel(104). Monitoring the paging channel, an MS(Mobile Station) receives the advertisement message in its home network or an external network(105).

Description

Method of transmission message related to mobile internet protocol in integrated internet protocol network {Method of transmission message with mobile IP in ALL-IP network}

The invention ^{3GPP (3 rd Generation Partnership Projects)} UMTS (Universal Mobile Telecommunication Service), 3GPP2 IMT-2000 (International Mobile Telecommunication) next-generation mobile communication network based integrated Internet Protocol (ALL-IP) the mobile node (a mobile station in a network, such as ( MS)) is a computer-readable recording of a method for delivering a mobile internet protocol related message and a program for realizing the method to enable the mobile terminal to efficiently receive a mobile internet protocol related message (preferably an advertisement message). It is about the medium.

Currently, the two main mechanisms of 3GPP (3 ^rd Generation Partnership Projects) and 3GPP2 of the International Conference on the Standardization of IMT-2000 system, the entire network, the Internet Protocol (IP: Internet Protocol) converged IP, based networks (All-IP) networks is issued It is expected to include a specification for implementing an All-IP network in the future.

All-IP network is a network using IP for all transmissions from terminal to core network and is expected to be evolved from existing network for compatibility with current mobile communication network.

3GPP defines the All-IP core network as "Release 2000 core that uses IP for the transport of all user data and signaling", and 3GPP2 "produces IP for user data and signaling between all network entities, including the terminal." IP-based network using "."

The all-IP network has an open structure in the form of a data network, which enables effective introduction of various services to be deployed in the future, especially IP-based services, and enables integrated and low-cost maintenance using IP. In addition, by using IP, it is possible to provide a flexible service regardless of access means (PSTN, LAN, HIPERLAN, Cable, Wireless, etc.), and has an advantage of efficiently constructing a multimedia service.

The ALL-IP network is being studied based on the Mobile IP of the International Engineering Task Force (IETF).

For reference, we will look at the background environment of Mobile IP.

As notebook computers become smaller, higher in performance, and wireless access technology improves, users are increasingly demanding mobility. However, in the current Internet Protocol (IP), routing is performed under the assumption that a host connecting to the Internet has a fixed location. Because of this, existing Internet protocols cannot forward IP datagrams to a new location on a host if the host moves to another network. In this environment, in order for a host moving to another network to continue to connect to the Internet, a valid IP address must be assigned from the network system to which the user moved, and the host configuration must be changed accordingly. This requires a lot of inconvenience in terms of IP address management. To solve this problem, the Internet Engine Task Force (IETF) proposed a protocol called Mobile IP (rfc 2002).

The Internet has been one of the key principles of design since the early days of development, its versatility including all kinds of network technologies. Under this principle, the mobile Internet should be designed to flexibly interoperate with existing networks, while also allowing for the exchange of different types of wired / wireless networks (packet radio, cellular telephone, Ethernet, etc.). In this regard, Mobile IP does not modify the current address system, name system, DNS, etc. for interworking with existing networks, but introduces a new address translation scheme to solve the Internet address translation problem due to mobility. Mobility was supported. The reasons why mobility support is not supported by the upper layer above the Transmission Control Protocol / User Datagram Protocol (TCP / UDP) layer or the lower layer below the data link layer are based on efficiency and versatility, respectively.

Mobile IP adopts a two-tier addressing scheme as an address translation scheme in the IP layer. That is, the first address is called a Care-Of Address (COA), which is used for routing and forwarding methods. The other address identifies the mobile host and the mobile host's unique home address (static IP address), which is used to connect to the session. ). The mobile host has a unique Internet address corresponding to the host name as a home fixed address as a conventional fixed host, and the mobile host has an address changed as it moves through the network as a COA as a delivery point of an actual packet. Since this COA is an address that changes when moving from network to network, an object that always manages the COA that changes according to the home address and location is needed. In addition, a mechanism is needed to know whether the location has been changed to another network or beyond to the network boundary in a mobile host wireless environment, and how to inform the address translation management object of such changes. I need it.

As such, the ALL-IP terminal has a unique Internet address corresponding to the host name as a home address as a conventional fixed host as a home address, and the address changed while the terminal moves through the network as a COA as a transmission point of an actual packet. To have.

Mobile IP is a modified form of IP that allows a node to continuously receive datagrams regardless of the location of the Internet to which the node is connected. Preliminary candidates for the mobile IP protocol must satisfy the following five characteristics:

First, the mobile node (mobile station) must be able to communicate with other nodes after changing its link layer access point to the Internet without changing its IP address.

Second, the mobile node must be able to communicate with other nodes that do not implement Mobile IP.

Third, all messages used for transmitting information to the mobile node's location and other nodes must be authenticated to be protected from remote redirection attacks.

Fourth, a link, which is the means by which a mobile node connects directly to the Internet, may often be a wireless link.

Fifth, Mobile IP cannot place additional restrictions on the assignment of IP addresses.

Currently, the IETF defines three components for mobile IP services: mobile node (mobile station), home agent (HA), and foreign agent (FA).

A mobile node (mobile station) is a host or router that supports mobility services, and can move between networks without changing its IP address and continuously communicates with other nodes on the Internet with its static IP address. can do.

The Home Agent (HA) is an agent that belongs to the mobile node's home network, which manages the mobile node's current COA and home address. When the mobile node is on an external network, the Home Agent (HA) forwards the mobile node's datagrams to the network to which the mobile node currently belongs. Tunneling to do so.

An external agent (FA) is an agent that grants a COA when a mobile node belongs to an external network, and may assign its IP address to a COA or a temporary IP address. When an external node enters its service area, the external agent provides routing services to these nodes, and detunnels the datagram sent from the mobile node's home agent to the mobile node. For datagrams sent from mobile nodes, an external agent (FA) provides basic gateway services.

In addition, the new terms used to describe mobile IP are as follows.

Mobility agents are referred to collectively as home agents (HAs) and external agents (FAs), agents that manage the mobility of each agent's network.

Home address is the only IP address that identifies the mobile node.

A home network is a network to which a mobile node's home address belongs.

The foreign network is a network other than the home network to which the mobile node belongs and moves.

Care-Of Address (COA) is an address used as a forwarding address when belonging to an external network and reflects the current access point of the mobile node. The COA is just the endpoint of the tunnel, which may be the address of the actual external agent (the external agent COA) or the address temporarily obtained by the mobile node (co-located COA).

Agent Advertisement (Agent Advertisement) message is a message that each mobility agent broadcasts to inform about their existence and about themselves.

Agent Solicitation message is a message requesting the mobile node to broadcast the agent advertisement message to the agent of the current network.

The Registration Request message is a message requesting the mobile node to bind the COA with the home address to the home agent (HA).

The Registration Reply message is a response message to the registration request.

Tunneling is a technique in which datagrams are encapsulated and transmitted to a desired destination, and the destination node inversely encapsulates the original datagram.

Mobile IP essentially handles three separate functions. Agent discovery, registration, and tunneling.

First, looking at agent discovery, home agents (HAs) and external agents (FAs) periodically advertise their presence on each link they serve. The newly arrived mobile node may find an agent by sending an agent acquisition message on the link.

Next, referring to the registration function, when the mobile node moves from the home network to the external network, the mobile node or the external agent FA registers the COA with its home agent HA. Depending on the access method, the mobile node registers directly with the home agent HA or through an external agent FA that forwards to the home agent HA.

Finally, in the tunneling function, the home agent HA should tunnel the datagram to the mobile node's COA so that the datagram can be delivered to the mobile node when the mobile node moves from the home network. When mobile IP moves from the home network to the external network, protocol tunneling is used to send datagrams to the mobile node's home address to the router between its home network and its current location. The tunnel terminates at the COA of the mobile node.

Currently, packet service is defined as 384Kbps in IS-2000, and standardization of "Release B" is being performed in 3GPP2 TSG-C for high speed packet service.

"Release B" shows a standard model for packet service of 2Mbps or more as shown in FIG. 1 and FIG. ALL-IP Adhoc also proposes a standard model of the ALL-IP network based on RN-4286 presented in 3GPP2, and standardization is currently in progress.

1 is a configuration example of a conventional network, ^{3GPP2 (3 rd Generation Partnership Projects-} 2) Fig.

Radio Access Network (RAN) (2) is composed of a control station (BSC: Base Station Controller), a packet control function (PCF) and a base station (BTS: Base station Transceiver Subsystem). Mobility management and authentication of a mobile station (MS) 1 is provided through a Visitor Location Register (VLR) 3 and a Home Location Register (HLR) 4.

When the basic authentication of the data call is completed, the radio access network (RAN) 2 establishes a virtual connection for the packet data service node (PDSN) 6 and the Generic Routing Encapsulation (GRE) protocol.

The packet data service node (PDSN) 6 establishes a Point-to-Point Protocol (PPP) connection with the MS 1 and establishes a Remote Authentication Dial In User (RADIUS) service. Service) Transfer subscriber authentication and billing information through server.

In providing the mobile IP service, the packet data service node (PDSN) 6 performs an external agent (FA) function, and the home agent (HA) 5 existing in the home network of the mobile station IP address is used for the mobile IP. It performs functions such as location information management and tunnel setting.

As such, the conventional packet control function unit (PCF) is an interworking system of a radio access network (RAN) 2 for interworking with a packet network, and the packet data service node (PDSN) 6 is a radio access network (RAN). It functions as an access node for connecting the data subscriber connected through (2) to the packet network, so that the radio access network (RAN) 2 and the packet network are completely separated.

However, in the future, 3GPP2 network or ALL-IP network is evolving the whole into one IP network, and the existing control station (BSC), packet control function unit (PCF) and packet data service node (PDSN) It is viewed as a system called a wireless access gateway (WAG). Accordingly, access nodes of data subscribers are increasingly being moved to the lower level of the network as they are integrated into a single wireless access gateway (WAG).

The protocol stack structure for FIG. 1 is shown in FIG.

The mobile node receives information related to the home agent (HA) or external agent (FA) called an advertisement message from the home agent (HA) or the external agent (FA) to which the mobile node currently belongs. The mobile node receives information related to the mobile node in the ALL-IP area. In order to deliver a message, the message must be delivered over a wireless area using the CDMA-2000 protocol. However, in the mobile IP area, this message may be considered as a signal, but in the CDMA-2000 area, this message is treated as traffic, so it is difficult to see it as an efficient operation.

Therefore, in order for the All-IP network to evolve into an open structure, the wireless protocol used by the mobile node to send advertisement messages received from the home agent or the external agent and received by the mobile node is CDMA-2000. A method that can be treated as) is required.

SUMMARY OF THE INVENTION The present invention has been proposed to meet the above-described demands, and when the mobile node is in the area of an external agent (FA) or a home agent (HA) in an integrated internet protocol (ALL-IP) network, Advertising message delivery method and program for realizing mobile internet protocol related message (preferably advertisement message) sent by external agency (FA) or home agent (HA) as signal message Its purpose is to provide a computer readable recording medium having recorded thereon.

1 is an exemplary configuration diagram of a mobile Internet protocol (IP) network.

2 is a diagram illustrating a protocol stack of a mobile IP network.

3 is an exemplary configuration diagram of a 3GPP2 integrated internet protocol (ALL-IP) network to which the present invention is applied.

4 is a configuration diagram of an ICMP router discovery message (RFC 1256) used in the present invention.

5 is an exemplary configuration diagram of an agency advertisement message used in the present invention.

6 is an exemplary configuration diagram of an agent advertisement extension message used in the present invention.

7 is a configuration diagram of a conventional neighbor list message.

8 is a diagram illustrating an embodiment of a neighbor list message used in the present invention.

9 is a diagram illustrating an embodiment of an advertisement message added to a CDMA wireless network used in the present invention.

10 is a flowchart illustrating an advertisement message delivery process at a transmitting side according to the present invention.

11 is a flowchart illustrating an advertisement message receiving process at a receiving side according to the present invention.

* Explanation of symbols for the main parts of the drawings

11 mobile station (MS) 12 base station (BTS)

13: control station (BSC) / wireless access network (RAN) + packet control function (PCF)

14: mobility manager (MM) 15: external agent (FA), access gateway device

16: media resource function 17: mobile IP home agent

18: media gateway device 19: border router

20: old MS domain support 21: location server

22: PDE 23: Individual Quality of Service Manager

24: AAA Security Manager 25: Advertising Agent

26: network performance gateway device 27: session control manager

28: Total Service Quality Manager 29: Service Application Department

30: roaming signal gateway device 31: relay line signal gateway device

32: media gateway device control function

In order to achieve the above object, the present invention provides a mobile Internet protocol (IP) used for recognizing each other's existence between a mobile node (mobile station) and an agent (agent) in a next-generation mobile communication network-based integrated internet protocol (ALL-IP) network. CLAIMS What is claimed is: 1. A method for delivering a related message, comprising: a first step of a mobile agent to which a mobile node belongs generates a mobile internet protocol (mobile IP) related message; And a second step of transmitting the mobile internet protocol (mobile IP) related message generated by the mobility agent to the mobile node through a signal message through a paging channel of the wireless network. It is characterized by.

In addition, the present invention provides a next generation mobile communication network based integrated Internet protocol (IP) with a processor to deliver a mobile internet protocol (IP) related message used to recognize each other's existence between a mobile node (mobile station) and an agent (agent). An all-IP) network, comprising: a first function of the mobile agent to which the mobile node belongs to generate the mobile internet protocol (mobile IP) related message; And a second function of transmitting the mobile internet protocol (mobile IP) related message generated by the mobility agent to the mobile node through a paging channel using a signal message of the wireless network. A computer readable recording medium having recorded thereon a program is provided.

According to the present invention, when the mobile node is located in an external agent (FA) or home agent (HA) area in the ALL-IP system, the mobile node should periodically receive an advertisement message sent from the FA or HA. In order to receive the message, the advertisement message is transmitted to the mobile node using the message of the existing CDMA radio environment.

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

3 is an exemplary configuration diagram of a 3GPP2 integrated internet protocol (ALL-IP) network to which the present invention is applied.

The mobile station (MS) 11 is in the range of any base transceiver system (BTS) 12, and the information of the mobile station 11 is controlled by the base station 12 and the control station (BSC: Base) that controls it. Information transmitted from the control station 13 is transmitted to the mobile station 11 via the base station 12.

The mobile station 11 is a wireless terminal including an ALL-IP terminal, a conventional mobile terminal (non-IP terminal), a personal digital assistant (PDA), and the like, which the user can carry and communicate with while moving, and forwards the data when receiving the data. The channel is used, and the reverse channel is used for transmission.

The text message transmitted and received at the mobile station 11 is connected to the control station 13 through the base station 12 for high frequency signal processing and call processing.

The base station (BTS) 12 connects the mobile station 11 to the control station 13, and includes an antenna, a digital channel unit (DCU), and a time / frequency control unit (TCU: Timing / Frequency Control). Unit), radio frequency unit (RFU), and global positioning system (GPS). In addition, the base station 12 performs a wired / wireless conversion function of communicating with the mobile station 11 over the air and communicating with the control station 13 by wire.

A wireless access gateway (WAG) can interwork or separate an existing control station (BSC), a packet control function (PCF) into a single system, and a wireless controller, voice and data gateway function. And so on. Looking at the function of each component in detail as follows.

The control station (BSC) 13 controls and manages one or more base stations (BTSs) 12, and performs traffic and signaling methods, mobility management, and mobile station (MS) 11 management related to call processing.

The radio access network (RAN) is composed of a control station (BSC) 13 and a base station (BTS) 12.

The packet control function unit (PCF) 13 may exist inside the control station (BSC) 13 or may be implemented as a separate system outside the mobile station (MS) transmitted from a radio access network (RAN). Data of the 10) to a packet data service node (PDSN) (external agent (FA) 15).

A mobility manager (MM) 14 performs handoff management between wireless access gateway devices or between networks.

The media resource function (MRF) 16 performs a management function of allocating / releasing resources of the media gateway devices 18.

The media gateway (MGW) 18 performs functions such as protocol and address translation when the user's data is transferred to a public switched telephone network (PSTN) or another network.

The media gateway control function (MGCF) 32 controls and manages the media gateway devices 18.

The Mobile IP Home Agent 17 manages the IP address of the external agent as a table of the location information of the mobile IP as a table, and transmits the transmission data to the subscriber through tunnel and encryption as necessary. Perform.

The border router (BR) 19 provides a function of connecting a hierarchical communication network (for example, an IP network, etc.) operating at a protocol level such as a core network.

The existing MS domain support unit 20 supports functions such as call processing, mobility management, service management, resource management, security management, and service management, which were provided in the existing line-type wireless network for the non-IP mobile terminal. To this end, it includes an existing network entity (that is, a home location register (HLR), a mobile switching center (MSC) server, a service control switch (SCP), etc.).

The position server 21 has positional information, a function such as a moving position center, and a linkage function with a position measurement device (PDE) 22.

Quality of Service Managers 23 and 28 manage network authentication and all voice and data service logic.

Authorization, Authentication, and Accounting (AAA) The security manager 24 provides Internet protocol functions that support authentication, authorization, and billing functions.

The advertising agent (ADA) 25 performs a function of providing an advertisement message for the service application capability to the requesting terminal.

The service application 29 provides an operator with an environment in which new services and application services can be created.

A network capability gateway device (NCGW) 26 manages resources required to provide a service to a network user, and provides a function for accessing network resources necessary for executing a service application.

The Session Control Manager (SCM) 27 sets up and manages sessions, states, and handoffs through various networks.

The roaming signaling gateway (R-SGW) 30 performs a function of converting packet signals into a signaling scheme of a circuit switched network or a signaling scheme of a circuit switched network into packet signals.

Trunk Signaling Gateway (T-SGW) 31 performs the function of converting the signaling method of the public switched telephone network (PSTN) and the signaling method of the core network.

A home subscriber server (HSS) includes at least network elements such as AAA, HLR, EIR, LOC, and UMS.

The Equipment Identity Register (EIR) is a database (DB) for device information.

The location related information DB (LOC) provides the location related information required by the location server 21.

The Policy Repository manages policy data and rules, allows interaction with various policies, and stores data on subscribers, multimedia usage policies, quality of service, validity times and paths.

The home location register (HLR) has information such as subscriber information, IP priority, resources and authority usage for interdomain services.

A mobile node (mobile station) receives information related to a home agent 17 or an external agent 15 called an advertising message from a home agent (HA) 17 or an external agent (FA) 15 to which it belongs. In the ALL-IP domain, this message is transmitted to the mobile node through the wireless domain using the CDMA-2000 protocol.

Now, the message types used by the mobile node and the agents to recognize each other's existence will be described in more detail. These messages communicate as an extension of the Router Discovery Protocol among Internet Control Message Protocol (ICMP) messages. Therefore, this router discovery protocol is described in depth. Additional information used in the mobile IP registration procedure is included in the extended message of the router advertisement message, which is called an agent advertisement message.

"Agent discovery" is used to determine whether the current position of the mobile node is the home network or the external network, and also used to determine whether it has moved from one network to another.

Then, looking at the agent discovery and acquisition method is as follows.

Agent advertisement is a form in which a mobility agent extension message is included in an ICMP router advertisement message. The agent acquisition message is very similar to the ICMP router acquisition message.

If the agent provides these agent discovery and acquisition functions, it is not necessary for the upper layer. The manner in which a mobile node establishes a connection between an agent and a connection layer may vary depending on the type of each connection layer. For example, nodes in Ethernet adhere to a unique frame type and transmission time and obtain an IEEE 802.2 address for the destination node. A typical radio link layer may involve finding the right radio channel and how to avoid "hidden terminal problems" using a reservation-based Media Access Control (MAC) layer protocol. It is assumed here that the connections in this connection layer are already established. In addition, agent discovery and acquisition procedures do not consider security.

Meanwhile, the router discovery protocol is as follows.

As the first method of discovering agents, Mobile IP extends the ICMP router discovery protocol. Therefore, it is important to understand the details related to the ICMP router discovery protocol.

In general, nodes on one link use the services of a directly connected router to deliver datagrams to nodes on the other link. In this case, the nodes send all datagrams to one router-default router.

Router discovery provides a way for a mobile node to obtain the local router's IP address and can monitor whether the mobile node remains fixed on a network. This is implemented using two simple ICMP messages. One is sent by the router and the other is sent by the host.

Router discovery messages are messages that are used to discover a neighboring router to a mobile node, rather than construct a routing protocol. Thus, the router found by these messages may not be the best router to reach a particular destination. If a node fails to select the router that makes the best path, it should receive an ICMP Redirect message from the selected router that provides the best router information.

Now, the ICMP router discovery message (RFC 1256) will be described with reference to FIG.

Routers according to RFC 1256 periodically broadcast a router advertisement message as shown in FIG. 4 where a link or routing service to which they are connected is provided. Hosts that can decode these protocols set this router as their default router after hearing the advertisement. The time it takes for hosts to configure the router is related to the router's broadcast cycle. If the host does not receive a message even once during the period it must listen to several broadcast messages, the host determines that the router is no longer able to provide service and waits for advertisement messages from other routers.

One of the features of router advertisement is to set the preference level for several router addresses in the router advertisement message so that the host can select a router with higher priority among several routers.

The meaning of each item of the router advertisement message shown in FIG. 4 is as follows.

Type: 9

Code: 0

Checksum: 16 bit 1's complement of 1's complement of ICMP message starting from type. This item is set to 0 to calculate the checksum.

-Number of addresses: The number of addresses of routers advertised in this message

Address Item Size: 32-bit word for each router address (2 for IPv4)

Valid time: The maximum time in seconds that a router address can be considered valid.

Router address [i]: i = 1 ... number of addresses. Router addresses advertised by the message

-Priority [i]: i = 1 ... number of addresses. The higher the priority number between router addresses, the higher the priority.

ICMP router discovery (advertisement) messages appear after the IP header because they are ICMP protocols. Each entry in the IP header has a generic IP header value. If the destination address is selected as the multicast address 204.0.0.1, it must be set to 1 such as TTL (Time To Live) in the IP header.

Meanwhile, the agent advertisement message has a form in which the agent advertisement extension message as shown in FIG. 6 is added to the router advertisement message of FIG. 4. The mobility agent sends an agent advertisement message to announce its existence. The mobile node receives this message to determine its location on the Internet. In addition, the agency advertisement message may include other information that is not yet determined. Agent advertisement messages include link layer headers, IP and ICMP headers and ICMP router advertisement messages. The value of each item is as follows.

1) link layer

Destination address: multicast or broadcast address. When sent in response to an agent acquisition message, unicast to the link address of the host that requested the agency advertisement message.

2) IP item

-TTL: TTL for all agency advertising messages is set to 1

Destination address: multicast address (224.0.0.1) or broadcast address (255.255.255.255).

3) ICMP item

Type: 9

Code: 0 (when the mobility agent handles general traffic, i.e. when the mobility agent acts as a router for IP datagrams as well as services to mobile nodes)

16 (when the mobility agent handles traffic only from mobile nodes registered to it, not handling general traffic)

Valid time: The maximum time in seconds that a router address can be considered valid.

Router Address: The router address recorded in the Router Advertisement message can also be used for this part.

-Number of addresses: The number of router addresses advertised in this message

When the agent advertisement message as shown in FIG. 5 is periodically broadcasted, the most suitable period is suitably broadcasted at a time interval of 1/3 of the valid time in the message. This determines that the router is no longer valid when the mobile node has not received agent advertisement messages at least three times in succession. The actual transmission time of each advertisement message should be sent at least partially randomly. This is to avoid collisions with advertisement messages sent by other agents.

Now, a description will be made of the agency advertisement extension message added to the agency advertisement message of FIG. 5 with reference to FIG. 6.

The agency advertisement message is followed by the ICMP router advertisement item as shown in FIG. 4 followed by extension data indicating that the agent advertisement message as shown in FIG.

Each item of the mobility agent advertisement extension message of FIG. 6 is defined as follows.

Type: 16

Length: (6 + 4 * N). N is the number of COAs included in the ad message

Sequence number: The number of advertisement messages sent since the agent was initialized.

Registration Valid Time: The longest registration time that the mobility agent can accept when the mobile node requests registration. 65,535 value means unlimited

-R: Registration is required. Requires registration with an external agent rather than Colocatel COA

-B: Overload (Busy). Do not accept registration requests from new mobile nodes if this flag is set

-H: Home agent. Provide home agency services on the link to which this advertising message was sent

-F: external agent. Provide third-party service for the link to which this advertising message was sent

M: minimal encapsulation. This agent supports minimal encapsulation.

G: Supports GRE (Generic record encapsulation) encapsulation.

V: Van Jacobson header compression. This agent supports Van Jacobson header compression for mobile nodes registered to it.

Reserve: Reserved bits. Set to 0

-COA: COA advertised by the agent. If the F bit is set in the agency advertisement message, it must include at least one COA.

The home agent should be able to provide the necessary services to its mobile node. In other words, if a mobile node requests a service from itself, it should not refuse it. To prevent overload, you can have multiple home agents in one home network. Then, the mobile nodes are distributed to each agent to prevent the service from being concentrated in one home agent. When using the above method, there are several advertisement messages in one network. Even when a mobile node not managed by the mobile node receives the advertisement message, the mobile node should let the mobile node know that it is staying in the home network. do.

External agents may not be able to service new mobile nodes due to overloading. Even in this case, the advertisement message must be continuously transmitted to inform the mobile nodes that have already registered, that they are still in the same network. The external agent may set the B bit in its advertising message to indicate that it is no longer able to provide service to new mobile nodes.

If the mobile nodes want to register with an external agent even if they have acquired a Colocated COA, set the R bit of the advertisement message. This bit applies only to external agents, so the R bit can be set only when the F bit is set. There is no correlation between the registration valid time of the agency advertisement extension message and the valid time of the ICMP router advertisement message.

In the current 3G system, the role of the external agent is played by the packet data service node (PDSN), and the advertisement message sent from the mobile node is transmitted to the base station (BTS) via the control station (BSC) and then through the CDMA wireless network. To be delivered.

Among the CDMA 2000 messages, a message similar to the advertisement message used in the mobile IP is a message containing information of neighbor cells, and a neighbor list message as shown in FIG. This neighbor list message is always transmitted from the base station as a pilot channel among the CDMA 2000 forward channels and broadcasted through a paging channel.

Up to seven paging channels can be used within a frequency. Information transmitted from the base station to the paging channel includes system configuration information, neighbor cell classification information, registration parameters, mobile station calls, CDMA channel allocation information, and the like.

Referring to FIG. 7, the meanings of the items of the neighbor list message are as follows.

PILOT_PN (Pilot PN Sequence Offset Index) is a pilot pseudo noise (PN) sequence of a base station (BTS) in which a current UE is located.

CONFIG_MSG_SEQ (Configuration Message Sequence Number) is a sequence number of a configuration message sent to a paging channel and managed by a base station (BTS).

PILOT_INC (Pilot PN sequence offset index increment) is a unit value of an offset that is increased when the UE searches for the remaining pilot set.

NGHBR_CONFIG (Neighbor Configuration) is a code value of information required for a UE for a new base station (BTS), such as characteristics of a neighbor BTS and frequency allocation.

The NGHBR_PN (Neighbor Pilot PN sequence offset index) is a pilot pseudo noise (PN) sequence of a neighbor base station (Neighbor BTS).

The present invention is a method of constructing and sending a new message (see FIG. 9) to a paging channel of a CDMA wireless network by sending an advertisement message used in a mobile IP through a paging channel of the CDMA wireless network. In the message, a method of adding an advertisement message to a neighbor list message (see FIG. 8) and sending the message is proposed.

In the current 3G system, the role of the external agent (FA) is played by the packet data service node (PDSN), and the advertisement message sent from the CDMA radio network is transmitted to the base station (BTS) via the control station (BSC). It is transmitted to the mobile node (mobile station (MS)) via.

In this case, when the advertisement message used in the mobile IP is sent through the CDMA wireless network, a method of constructing and sending a new message to the paging channel of the CDMA wireless network as shown in FIG. As shown in FIG. 8, there is a method of adding an advertisement message to a neighbor list message among paging channel messages of a CDMA wireless network.

Referring to the process of transmitting the advertisement message as shown in FIG. 8 and FIG. 9 through the paging channel of the CDMA wireless network, first display the relevant information of the home agent (HA) and the external agent (FA) in the packet data service node (PSDN) An advertisement message is generated in operation 101 and the generated advertisement message is transmitted in operation 102.

Then, when the advertisement message is received by the control station (BSC) via the IP transmission or routing path to the base station (BTS) (103), the base station (BTS) broadcasts the advertising message using the paging channel of the CDMA wireless environment (Broadcasting) (104). Then, the mobile node (mobile station MS) receives the advertisement message from its home network or external network (105).

On the other hand, the mobile node (mobile station MS) monitors (monitors) the paging channel as shown in FIG. 9 (111), when an advertisement message is received through the paging channel (112), the received advertisement message is layer 3 (Layer 3). ), And in layer 3, the received advertisement message is sent to the IP layer (114). Here, layer 3 is a layer including radio channel related allocation / release and management function parts. This layer supports the functions related to the assignment and release of radio channels and the assignment and release of traffic channels that can transmit user data so that the upper Internet related protocols can operate above the IS-2000 layer. Provide to the layer.

Thereafter, the IP layer uses an advertisement message delivered through layer 3 (115).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

The present invention as described above, the mobile node in the All-IP network of the CDMA wireless environment can effectively receive the advertisement message using the message of the CDMA wireless environment, the mobile node in the All-IP network of the CDMA wireless environment CDMA Since the advertisement message is received by using the signal message of the wireless environment, it is possible to efficiently use the resources of the wireless environment to attract more subscribers in the same wireless environment.

Claims (6)

In a method for delivering a mobile Internet protocol (IP) related message used for recognizing each other's existence between a mobile node (mobile station) and an agent (agent) in a next generation mobile communication network-based integrated internet protocol (ALL-IP) network, A first step of the mobile agent to which the mobile node belongs generates the mobile internet protocol (mobile IP) related message; And A second step of transmitting the mobile internet protocol (mobile IP) related message generated by the mobility agent to the mobile node through a signal message through a paging channel of the wireless network Advertising message delivery method in an integrated Internet protocol network comprising a. The method of claim 1, The mobile internet protocol (mobile IP) related message, Substantially, the agent (agent) advertising message transmitted through the paging channel of the wireless network, characterized in that the advertising message delivery method in the Internet protocol network. The method of claim 1, The mobile internet protocol (mobile IP) related message, The advertisement message delivery method in the integrated internet protocol network, characterized in that the advertisement message content is included in a neighbor list message that is always transmitted from a base station and broadcasted through a paging channel. The method according to any one of claims 1 to 3, The process of transmitting the mobile internet protocol (mobile IP) related message in the mobility agent, A third step of generating, by the packet data service node (PSDN), the agent (agent) advertisement message indicating the related information of the home agent (HA) and the external agent (FA) and transmitting the generated agent (agent) advertisement message; ; And When the agent advertisement message is received at the base station (BTS) via the control station (BSC) through an Internet protocol (IP) transmission or a routing path, the agent (agent) using the paging channel of the wireless environment at the base station (BTS) 4th step of broadcasting an advertising message Advertising message delivery method in an integrated Internet protocol network comprising a. The method according to any one of claims 1 to 3, Receiving the mobile internet protocol (mobile IP) related message at the mobile node, When the mobile node monitors (monitors) a paging channel and receives the agent (agent) advertisement message through the paging channel, the mobile node sends the received agent (agent) advertisement message to Layer 3, and the third layer delivers the received advertisement. The advertising message delivery method in the integrated Internet protocol network, characterized in that to use the advertising message in the upper layer to send the agent (agent) advertising message to the upper layer Internet Protocol (IP) layer. A next-generation mobile communication network-based integrated Internet protocol (ALL-IP) network with a processor for delivering mobile Internet Protocol (IP) -related messages used to recognize each other's presence between mobile nodes (mobile stations) and agents (agents). on, A first function of generating, by the mobility agent to which the mobile node belongs, the Mobile Internet Protocol (Mobile IP) related message; And A second function of transmitting the mobile internet protocol (mobile IP) related message generated by the mobility agent to the mobile node through a signal message through a paging channel of the wireless network when transmitting the message through a wireless network; A computer-readable recording medium having recorded thereon a program for realizing this.