KR20090050628A - System and method for supporting connection multi host in an wireless communication system - Google Patents

Abstract

The present invention provides an access control router for controlling the mobile station through a plurality of hosts, a mobile station supporting a gateway to the plurality of hosts, and a radio access station (RAS) connected to the mobile station. In a communication system including an access control router (ACR) and a home agent (HA) that transmits data to the access control router, the mobile station is connected to the hosts and a dynamic host configuration protocol (DHCP). ), The access control router repeatedly processes the mobile station and the dynamic host configuration protocol at the same number of times as the number of dynamic host configuration protocols with the hosts, and performs dynamic host configuration protocols with the hosts. The home agent is connected to the access control router and proxy mobile internet in the same number of times. Iteratively processes the protocol (PMIP: Proxy Mobile Internet Protocol), and the hosts are respectively connected to the mobile stations.

Description

System and Method for Supporting Connection Multi Host in an Wireless Communication System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system. In particular, a plurality of hosts are connected through one gateway in a broadband wireless access (BWA) communication system. The present invention relates to a multi-host connection support system and method for receiving a service.

In the next generation wireless communication system, active researches are being conducted to provide users with services of various quality of service (QoS) having a high transmission speed (hereinafter referred to as 'QoS'). In particular, in the current generation wireless communication system, a wireless local area network (WLAN) system and a wireless metropolitan area network (WMAN) will be referred to as "WMAN". Researches are being actively conducted to support high-speed services in a form of guaranteeing mobility and QoS in a broadband wireless access (BWA) communication system such as a system. The representative communication systems are the Institute of Electrical and Electronics Engineers (IEEE) 802.16a / d communication system and the IEEE 802.16e communication system.

The IEEE 802.16a / d communication system and the IEEE 802.16e communication system, which are the BWA communication system, orthogonal frequency division (OFDM) to support a broadband transmission network on a physical channel of the WMAN system. A multiplexing (hereinafter referred to as "OFDM") / orthogonal frequency division multiple access (OFDMA) scheme is a communication system employing the scheme. The IEEE 802.16a / d communication system currently considers only a single cell structure and a state in which a subscriber station (SS) (hereinafter referred to as SS) is fixed, i.e., does not consider SS mobility at all. System. In contrast, the IEEE 802.16e communication system is a system considering the mobility of the SS in the IEEE 802.16a communication system, and the SS having the mobility is referred to as a mobile station (MS).

Meanwhile, such a next generation wireless communication system allocates an Internet Protocol (IP) address to one MS, and one host is connected through the one MS. The host is provided with the service through the MS. That is, one IP address is assigned to only one host, and when another host wants to be provided with the service, the other host connects through an MS different from the MS, that is, the other MS is different from the one IP address. Another IP address is assigned, and after accessing through the other MS to which the other IP address is assigned, a service is provided.

However, the wireless communication system requires a plurality of MSs to support the plurality of hosts when one or more hosts exist because the MS assigned to the IP address supports only one host. In addition, there is a problem of supporting access of the hosts by allocating an IP address to all of the plurality of MSs. In other words, the wireless communication system decreases the use efficiency of the limited IP address by allocating an IP address to all of the plurality of MSs in order to support access of a plurality of hosts, thereby supporting access to only a limited number of hosts. There is a problem of providing only to a limited number of hosts. Accordingly, there is a need for a connection support scheme that allows a plurality of hosts to be accessible through one MS suitable for the wireless communication system.

Accordingly, an object of the present invention is to provide a connection support system and method for allowing a plurality of hosts to be connected using one mobile station to provide a service to a plurality of hosts in a wireless communication system.

Another object of the present invention is to provide a connection support system and method for allowing a plurality of hosts to be connected to a mobile station assigned with one Internet protocol address in a wireless communication system.

In addition, another object of the present invention is to provide a mobile station that supports a gateway function to allow a plurality of hosts to be connected in a wireless communication system.

A method of the present invention for achieving the above object, a plurality of hosts, a mobile station that supports a gateway (gateway) to the plurality of hosts, and a radio access station (RAS) connected to the mobile station An access control router (ACR) for controlling the mobile station and a home agent (HA) for transmitting data to the access control router via a communication system for supporting the connection of the plurality of hosts. And the mobile station processes the hosts and the Dynamic Host Configuration Protocol (DHCP) respectively, and the access control router performs the same number of times as the number of times of the dynamic host configuration protocol processing with the hosts. Iteratively processing a mobile station and the dynamic host configuration protocol, and a dynamic host with the hosts The home agent repeatedly processing the access control router and the proxy mobile internet protocol (PMIP) at the same number of times as a configuration protocol processing number, wherein the hosts are respectively connected to the mobile station.

According to another aspect of the present invention, there is provided a method for supporting access of a mobile station in a broadband wireless access communication system, the method being connected to the mobile station in accordance with a Dynamic Host Configuration Protocol (DHCP) processing procedure. Configuring service flow classification rule information corresponding to Internet Protocol (IP) addresses of the hosts, and having a same connection identifier (CID) and a corresponding connection identifier for each service flow of the hosts. Receiving data traffic including a destination Internet protocol address of one of the Internet protocol addresses from the base station, and transmitting the data traffic to a host corresponding to the destination Internet protocol address according to the service flow classification rule information; Step down And a step.

According to another aspect of the present invention, there is provided a method for supporting connection of a access control router in a broadband wireless access communication system, the mobile station corresponding to a dynamic host configuration protocol (DHCP) processing procedure. Configuring service flow classification rule information corresponding to Internet Protocol (IP) addresses of the hosts connected to each other; and the same one for each service flow of the hosts corresponding to the service flow classification rule information. And transmitting from the base station data traffic including a Generic Routing Encapsulation (GRE) key and a destination Internet protocol address of one of the hosts' Internet protocol addresses.

A system of the present invention for achieving the above objects is a system for supporting a connection, comprising: a plurality of hosts, a mobile station supporting a gateway to the plurality of hosts, and a wireless access station connected to the mobile station. An access control router (ACR) for controlling the mobile station via a radio access station (RAS) and a home agent (HA) for transmitting data to the access control router. The host and the Dynamic Host Configuration Protocol (DHCP) are respectively processed, and the access control router performs the dynamic host configuration protocol with the mobile station at the same number of times as the number of processing of the dynamic host configuration protocol with the hosts. Process repeatedly, and the home agent has a number of dynamic host configuration protocol processing times with the hosts. The access control router and the Proxy Mobile Internet Protocol (PMIP) are repeatedly processed the same number of times, and the hosts connect to the mobile stations, respectively.

The present invention improves the use efficiency of the limited Internet protocol by providing a service by accessing a plurality of hosts to a gateway provided by a mobile station allocated with one Internet protocol in a wireless communication system, and providing services to more hosts. In other words, the performance of the system can be improved by providing a service by supporting a connection so that all hosts to be provided with the service can access the service.

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

The present invention relates to a wireless communication system, for example, an IEEE (Institute of Electrical and Electronics Engineers) 802.16 communication system and an IEEE 802.3 communication system, which is a broadband wireless access (BWA) communication system. We propose a connection support system and method. Here, in the embodiment of the present invention to be described later, orthogonal frequency division multiplexing (OFDM) / orthogonal frequency division multiple access (OFDM) in the IEEE 802.16 communication system for convenience of description. (OFDMA: Orthogonal Frequency Division Multiple Access, hereinafter referred to as "OFDMA") The communication system is applied as an example will be described as an example, the connection support system and method proposed in the present invention can be applied to other communication systems .

In addition, the present invention proposes a system and method for supporting a connection of a plurality of hosts provided with a service in a wireless communication system. In an embodiment of the present invention to be described later, a plurality of hosts are connected to receive a service through a mobile station (MS: Mobile Station, hereinafter referred to as "MS") that supports a gateway function. We propose a connection support system and method for a host). Herein, in the embodiment of the present invention described below, an Internet Protocol (IP) address is assigned to one MS so that the MS supports a gateway function and the gateway function is assigned. A dynamic host configuration protocol (DHCP) between a supporting MS (hereinafter referred to as a 'gateway MS') and a plurality of hosts that want to be provided with a service by connecting to the gateway MS will be referred to as a 'DHCP'. Each process supports a connection of multiple hosts so that all hosts connect with the gateway MS. That is, in the exemplary embodiment of the present invention, one gateway MS and a plurality of hosts each perform a DHCP processing procedure so that the plurality of hosts are connected to the gateway MS to receive a service.

In addition, in the embodiment of the present invention to be described later, as described above, the gateway MS performs a function of a base station (BS) while the plurality of hosts are connected to one gateway MS to receive a service. Handover from a Radio Access Station (RAS) (hereinafter referred to as RAS) (hereinafter referred to as `` Serving RAS '') to another adjacent RAS (hereinafter referred to as "target RAS") In this case, an access control router (ACR: called ACR) (hereinafter referred to as a serving ACR) that performs a function of a control station and controls the serving RAS and the gateway MS The context information of the gateway MS is transmitted to an ACR controlling the target RAS (hereinafter referred to as a 'target ACR') so that the plurality of hosts are provided while being connected to the gateway MS. It should continue to receive the services provided without interruption. That is, according to the present invention, even when the gateway MS is handed over while a plurality of hosts are connected to the gateway MS to provide a service, the plurality of hosts are connected to the gateway MS to continuously receive the service. Next, a structure of a wireless communication system according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 1.

1 is a view schematically showing the structure of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 1, the communication system includes a plurality of hosts, that is, a host 1 (110), a host 2 (120), a host 3 (130), and a gateway for the hosts (110, 120, 130). Function and the gateway MS 140 connected to the hosts 110, 120, and 130 through Ethernet, and perform a BS function as described above, and perform data communication with the gateway MS 140 in an IEEE 802.16 communication manner. A RAS 150 for transmitting and receiving, an ACR 160 connected with the RAS 120 and controlling the RAS 120 and the gateway MS 140, and an ACR 160 connected with the gateway MS 140. A home agent (HA), which assigns an IP address to the server 170. Here, the hosts 110, 120, and 130 are wired / wireless communication devices such as a terminal, a computer, and the like, which are to be provided with a service by accessing one gateway MS 140 assigned an IP address.

As described above, the gateway MS 140 supports a gateway function to the hosts 110, 120, and 130 that are to be provided with a service through an IP address assigned to the gateway MS 140, and allows all the hosts 110, 120, and 130 to access the same. DHCP processing procedures are performed with the hosts 110, 120, and 130, respectively. The RAS 150 is connected to the gateway MS 140 and a wireless access standard for accessing a wireless communication system. In the embodiment of the present invention, the RAS 150 performs a wireless connection according to the IEEE 802.16 standard since the communication system is assumed to be an IEEE 802.16 communication system. A function of a base station, that is, an initial access procedure for transmitting and receiving data to and from the gateway MS 140, performs a data transmission / reception function after connecting to the gateway MS 140. In other words, the RAS 150 processes RF signals with the gateway MS 140 and physical (PHYsical) PHY Layer and Media Access Control (MAC). It performs a function in the MAC layer, and performs a scheduling and ranging operation with the gateway MS 140. In addition, the RAS 150 transmits initialization and communication system information of a cell capable of receiving a service from the gateway MS 140 and handover of the gateway MS 110 when the gateway MS 140 moves. Support.

The ACR 160 performs a function of controlling the RAS 150, and one ACR 160 may control a plurality of RASs. In addition, the ACR (160) is a server that provides a variety of services, such as a location server for providing location-based services, VoD / AoD server for providing video and audio services, a web server for providing Internet web services. By providing a service provided by the VoIP / VT server and the like to provide a voice and video service to the RAS (150) to provide the service to the gateway MS 140 to the hosts (110, 120, 130), to access the wireless communication system for this purpose The gateway MS 140 performs functions such as authentication, MAC protocol processing, IP management, and routing. In addition, the ACR 160 performs a connection procedure with the RAS 150 and the HA 170, in this embodiment of the present invention, assuming that the communication system is an IEEE 802.3 communication system. The HA 170 assigns an IP address to the gateway MS 140 so that the gateway MS 140 supports gateway functions for the hosts 110, 120, and 130, and hosts connected to the gateway MS 140. The services 110, 120, and 130 are to be provided from the servers as described above. Next, a connection related protocol of a host in a wireless communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 2.

2 is a diagram schematically illustrating a connection related protocol stack of a host in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 2, in the communication system, the host-related protocol stack of the host includes the protocol-related protocol stack 200 of the host and the data-receive-related protocol stack 250 after connection with the host.

In the control related protocol stack 200, the protocol stack of the host 202 is referred to as DHCP version 4 / DHCP version 6 (DHCPv4 / v6) and User Datagram Protocol (UDP). ), IP, IEEE 802.3 MAC protocol (802.3 MAC), and IEEE 802.3 PHY protocol (802.3 PHY). The protocol stack of the gateway MS 204 in the control-related protocol stack 200 includes an IEEE 802.3 MAC protocol (802.3 MAC), a WiMAX (Wireless Worldwide Interoperability for Microwave Access) MAC protocol (WiMAX MAC), an IEEE 802.3 PHY protocol ( 802.3 PHY), and the WiMAX PHY protocol (WiMAX PHY).

In addition, the protocol stack of the RAS 206 in the control-related protocol stack 200, WiMAX MAC link protocol (WiMAX MAC R6), WiMAX MAC protocol (WiMAX MAC), IP, IEEE 802.3 MAC protocol (802.3 MAC), WiMAX PHY protocol (WiMAX PHY), and IEEE 802.3 PHY protocol (802.3 PHY). In addition, the protocol stack of the ACR 208 in the control related protocol stack 200 includes a DHCP version 4 / DHCP version 6 (FA, DHCPv4) for IP address allocation with the IEEE 802.3 link protocol (R6) and the gateway MS (204). / v6), Proxy Mobile IP (PMIP: Proxy Mobile IP, hereinafter referred to as 'PMIP') Version 4 / PMIP Version 6 (PMIPv4 / v6), Transmission Control Protocol (TCP) / UDP, IP, IEEE 802.3 MAC protocol (802.3 MAC), and IEEE 802.3 PHY protocol (802.3 PHY). In addition, the protocol stack of the HA 210 in the control-related protocol stack 200 includes HA protocol version 4 / HA protocol version 6 (HAv4 / HAv6), UDP, IP, IEEE 802.3 MAC protocol (802.3 MAC), and IEEE. 802.3 PHY protocol (802.3 PHY).

The protocol stack of the host 252 in the data transmission / reception related protocol stack 250 includes IP, IEEE 802.3 MAC protocol (802.3 MAC), and the protocol stack of the gateway MS 254 is an IEEE 802.3 MAC protocol (802.3). MAC), the WiMAX MAC protocol (WiMAX MAC), the IEEE 802.3 PHY protocol (802.3 PHY), and the WiMAX PHY protocol (WiMAX PHY).

In addition, the protocol stack of the RAS 256 in the data transmission and reception related protocol stack 250 includes a WiMAX MAC protocol, a generic routing encapsulation (GRE) that is a tunneling protocol for data transmission and reception, IP, IEEE 802.3 MAC protocol ( 802.3 MAC), WiMAX PHY protocol (WiMAX PHY), and IEEE 802.3 PHY protocol (802.3 PHY). The protocol stack of the ACR 258 in the data transmission and reception related protocol stack 250 includes a GRE, IP in IP (IPinIP), IP, IEEE 802.3 MAC protocol (802.3 MAC), and IEEE 802.3 PHY protocol (802.3 PHY). The protocol stack of the HA 260 includes IP in IP (IPinIP), IP, IEEE 802.3 MAC protocol (802.3 MAC), and IEEE 802.3 PHY protocol (802.3 PHY). Here, the protocol stack of each component included in the communication system as described above may be configured differently according to the connection standard supported by the wireless communication system. Next, a procedure of receiving a service and providing a connection to a gateway MS of a plurality of hosts in a wireless communication system according to an embodiment of the present invention will be described with reference to FIG. 3.

3 is a diagram schematically illustrating a procedure of receiving a service by connecting a plurality of hosts to a gateway MS in a wireless communication system according to an exemplary embodiment of the present invention. 3 is a diagram illustrating a procedure 300 in which a plurality of hosts access a gateway MS, and a procedure 350 in which a plurality of hosts access a gateway MS and receive services.

Referring to FIG. 3, a gateway MS providing a gateway to a plurality of hosts 302, 304, 306 in a connection procedure 300 between a plurality of hosts 302, 304, 306 and a gateway MS 308 in the communication system, a gateway MS that is a gateway MS. 308, RAS 310, and ACR 312 perform an initial access procedure, assign IP address of gateway MS 308 through entry and authentication into network (NW: NetWork), and initial service. A process of generating a flow (ISF: Initial Service Flow, hereinafter referred to as 'ISF') is performed (steps 320 and 322). Then, the plurality of hosts 302, 304, 306 are connected to a gateway, that is, the gateway MS 308, that is, the host 1 302, the gateway MS 308, and the host 2, respectively. Steps 324, 326, and 328 respectively perform a DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure between the 304 and the gateway MS 308, and the host 3 306 and the gateway MS 308. ). Then, a DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure is performed between the gateway MS 308 and the ACR 310 (step 330), and the PMIP version 4 / between the ACR 312 and the HA 314 is performed. The PMIP version 6 (PMIPv4 / v6) processing procedure is performed (step 332).

At this time, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (steps 324, 326, and 328) between each of the hosts 302, 304, and 306 and the gateway MS 308 so that all of the hosts 302, 304, and 306 are connected. Is performed three times, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 330) between the gateway MS 308 and the ACR 312 and the PMIP version between the ACR 312 and the HA 314. 4 / PMIP Version 6 (PMIPv4 / v6) Processing Procedure (Step 332) Also, the DHCP Version 4 / DHCP Version 6 (DHCPv4 / DHCPv6) Processing Procedure (step 324, 326) between the respective hosts (302, 304, 306) and the Gateway MS (308). Step 328), the same number of times, that is, three times. In other words, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 330) between the gateway MS 308 and the ACR 312 and the PMIP version 4 / PMIP between the ACR 312 and the HA 314. The version 6 (PMIPv4 / v6) processing procedure (step 332) is performed by the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 324), which performs host 1 302 to connect to the gateway MS 308. Correspondingly, and in accordance with the DHCP Version 4 / DHCP Version 6 (DHCPv4 / DHCPv6) processing procedure (step 326), in which Host 2 304 is connected to the gateway MS 308, and Host 3 306 This procedure corresponds to the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 328) performed to be connected to the gateway MS 308.

Here, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 330) between the gateway MS 308 and the ACR 312 and the PMIP version 4 / PMIP version between the ACR 312 and the HA 314. 6 (PMIPv4 / v6) processing procedure (step 332) has been described as being performed first for the connection of the host 1 (302) and last for the connection of the host 3 (306) for convenience of description, the host DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (step 330) between the gateway MS 308 and the ACR 312 performed for connection of the devices 302, 304, and 306 and the HA 314. The PMIP Version 4 / PMIP Version 6 (PMIPv4 / v6) processing procedure (step 332) may be performed by the host priority of the hosts 302, 304, and 306, such as the connection request order, to the gateway MS 308 of the hosts 302, 304, and 306. It is performed according to the ranking.

In addition, in the exemplary embodiment of the present invention, the case in which three hosts 302, 304, and 306 are connected to the gateway MS 308 to provide a service has been described as an example. However, to access the gateway MS 308, a service is provided. If the hosts are more or less than the above, the present invention provides the above-described DHCP between all the hosts and the gateway MS 308 so that all the hosts to be provided with the service can access the gateway MS 308. Version 4 / DHCP Version 6 (DHCPv4 / DHCPv6) processing procedures (steps 324, 326, and 328) are respectively performed, that is, the number of hosts, and performed between all the hosts and the gateway MS 308. The DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) is performed between the gateway MS 308 and the ACR 312 by the same number of times as the number of times of the procedure (steps 324, 326, and 328). DHCP Version 4 / DHCP Version 6 (DHCPv4 / DHCPv6) Processing Procedure (Step 330) and PMIP Version 4 / PMIP Version 6 (PMIPv4 / v6) Processing Procedure (Step 332) performed between the ACR 312 and the HA 314. Is performed repeatedly.

The DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure (steps 324, 326 and 330) between the hosts 302, 304 and 306 and the gateway MS 308 and the gateway MS 308 and the ACR 312 are performed. DHCP Version 4 / DHCP Version 6 (DHCPv4 / DHCPv6) processing procedure (step 330) and PMIP Version 4 / PMIP Version 6 (PMIPv4 / v6) processing procedure (step 324) between the ACR 312 and the HA 314. When the plurality of hosts 302, 304, and 306 are connected to the gateway MS 308 with an IP connection, the ACR 312 and the gateway MS 308 provide a service that the hosts 302, 304, and 306 want to receive. In step 334, a flow of a service to be provided is added to a service flow classification rule for classification.

In other words, the gateway MS 308 and the ACR 312 have a type of service that the hosts 302, 304, and 306 want to provide, for example, an Unsoilicited Granted Service (UGS) type (UGS). A real time polling service (rtPS) type, a non real time polling service (nrtPS) type, It is classified into service types such as a Best Effort Service (BES) type. When the initial connection procedure 300 of the plurality of hosts 302, 304, 306 and the gateway MS 308 is completed in the wireless communication system, the HA 314 is performed in the procedure 350 in which the plurality of hosts 302, 304, 306 are provided with the service. ) Transmits the data traffic of the service to be provided to each of the connected hosts 302, 304, and 306 to the ACR 312, respectively (steps 352, 354, and 356), and the ACR 312 sends the data from the HA 314. The received data traffic is transmitted to the RAS 310 (step 358), the RAS 310 transmits the data traffic received from the ACR 312 to the gateway MS 308 (step 360), and the gateway MS 308 transmits the data traffic received from the RAS 310 to the hosts 302, 304, and 306, respectively (steps 362, 364, and 366).

In addition, when transmitting data traffic, each of the hosts 302, 304, and 306 transmits data traffic of a service that they want to receive to the gateway MS 308 (steps 362, 364, and 366). 308 transmits the data traffic received from each of the hosts 302, 304, and 306 to the RAS 310 (step 360), and the RAS 310 sends the data traffic received from the gateway MS 308 to the ACR 312. In step 358, the ACR 312 transmits data traffic received from the RAS 310 to the HA 314 (steps 352, 354, and 356). In this case, data traffic is transmitted and received (steps 362, 364 and 366) between the hosts 302, 304 and 306 and the gateway MS 308, and steps 352 and 354 between the ACR 312 and the HA 314. The data traffic (step 356) includes destination IP addresses destined for the hosts 302, 304, and 306, respectively, and is transmitted and received.

In this case, data traffic transmitted / received (step 360) between the gateway MS 308 and the RAS 310 including a destination IP address destined for each of the hosts 302, 304, and 306 is the same IEEE 802.16 connection identifier (CID: Connection). Identifier (hereinafter, referred to as 'CID')), that is, the gateway MS 308 and the RAS 310 transmit and receive data traffic using the same CID. Data traffic transmitted and received between the RAS 310 and the ACR 312 including the destination IP address destined for each of the hosts 302, 304, and 306 (step 358) is transmitted and received with the same GRE key, that is, The RAS 310 and the ACR 312 transmit and receive data traffic using the same GRE key. In addition, the data traffic and the gateway MS (transmitted and received (steps 352, 354, 356) between the HA 314 and the ACR 312 including the destination IP address destined for each of the hosts (302, 304, 306). Data traffic transmitted and received (steps 362, 364, and 366) between the hosts 302, 304, and 306 are transmitted and received for each destination IP address destined for each of the hosts 302, 304, and 306, respectively. Next, referring to FIG. 4, as described in FIG. 3, when a plurality of hosts access the gateway MS and handover while receiving services, a procedure for continuously receiving the services provided by the plurality of hosts will be described. Shall be.

4 is a diagram illustrating a service providing procedure when a handover is performed for a gateway MS to which a plurality of hosts are connected in a wireless communication system according to an exemplary embodiment of the present invention. Here, FIG. 4 illustrates a procedure 400 when a plurality of hosts are connected to a gateway MS to perform a handover to the gateway MS while receiving a service as described above with reference to FIG. 3, and a handover to the gateway MS. Thereafter, the plurality of hosts continuously show the procedure 450 of receiving the provided service.

Referring to FIG. 4, in a procedure 400 of handing over a gateway MS 408 while a plurality of hosts 402, 404, 406 are provided with a service in the communication system, the plurality of hosts 402, 404, 406 are connected to the gateway. The tactic between the serving RAS RAS1 410 and the serving ACR controlling the RAS1 410 while the connection to the MS 408 is connected to receive the service (steps 420, 422 and 424). As described above, in the state of performing network entry, authentication, and ISF generation procedure by an initial access procedure (step 426), the ACR2, which is a target ACR, in a cell managed by the RAS1 410, which is the serving RAS, is operated by the gateway MS 408. When moving to a cell managed by RAS2 416, which is a target RAS in 418, the gateway MS 408 sends a message for handover with RAS1 410, for example, a handover request / response message and a hand. Handover Indicate Message, etc. Transmission and reception to perform the handover (step 428).

Then, the ACR1 412 serving as the ACR transmits context information of the handovered gateway MS 408 to the ACR2 418 serving as the target ACR controlling the RAS2 416 (step 430). The context information includes information indicating that the gateway MS 408 is an MS supporting a gateway to a plurality of hosts 402, 404, and 406, that is, a gateway MS supporting multi-hosts. Then, the ACR2 416 checks the context information of the gateway MS 408 to identify the hosts 402, 404, 406 connected to the gateway MS 408 and receive services, that is, the data path of data traffic to be transmitted and received. Check the destination IP address. Next, the PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedure between the ACR2 418 and the HA 414 is performed (step 432), and the service received from the various servers as described above is HA 414. To provide to the gateway MS 408 via the new serving ACR and RAS, ACR2 418 and RAS2 416.

At this time, the HA 414 transfers the PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedure 432 with the ACR2 418 to the ACR1 412 and the HA (the initial connection procedure of the hosts 402, 404, 406). 414 is repeatedly executed as many times as the number of PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedures performed, that is, the number of hosts 402, 404, 406 connected to the gateway MS 408 is repeatedly performed, and ACR2 418 is performed. The IP address obtained by the gateway MS 408 is updated.

When the handover procedure 400 of the gateway MS 408 to which the plurality of hosts 402, 404 and 406 are connected in the wireless communication system is completed, the HA 450 in the procedure 450 where the plurality of hosts 402, 404 and 406 are provided with the service. 414 transmits data traffic of a service to be provided to each of the connected hosts 402, 404, and 406 to ACR2 418, which is a new serving ACR (steps 452, 454, and 456), and the ACR2 412 The data traffic received from the HA 414 is transmitted to the new serving RAS RAS2 416 (step 458), and the RAS2 416 forwards the data traffic received from the ACR2 418 to the gateway MS 408. In step 460, the gateway MS 408 transmits the data traffic received from the RAS2 416 to the hosts 402, 404, and 406, respectively (steps 462, 464, and 466).

In addition, each of the hosts 402, 404, 406 transmits the data traffic of the service they wish to provide to the gateway MS 408 (steps 462, 464, and 485), and the gateway MS 408 sends each of the hosts Transmit data traffic received from 402, 404, 406 to RAS2 416 (step 460), and RAS2 416 sends data traffic received from the gateway MS 408 to ACR2 418 (step 458). The ACR2 418 transmits the data traffic received from the RAS2 416 to the HA 414 (steps 452, 454, and 456). In this case, data traffic is transmitted and received (steps 462, 464, and 466) between the hosts 402, 404, and 406 and the gateway MS 408, and transmission and reception (steps 452 and 454) between the ACR2 416 and the HA 414. As described above, the data traffic (step 456) includes a destination IP address for receiving the data traffic and is transmitted and received.

In this case, the destination IP address is a destination IP address for each of the hosts 402, 404, and 406. In addition, the data traffic transmitted and received between the gateway MS 408 and the RAS2 416 (step 460) is transmitted and received with the same IEEE 802.16 CID, that is, the gateway MS 408 and the RAS2 416 use the same CID. Send and receive The data traffic transmitted and received between the RAS2 416 and the ACR2 418 (step 458) is transmitted and received with the same GRE key, that is, the RAS2 416 and the ACR2 418 transmit and receive data traffic using the same GRE key. . In addition, data traffic between the HA 414 and the ACR2 418 including the destination IP address destined for each of the hosts 402, 404, and 406 (steps 452, 454, and 456) and the gateway MS ( Data traffic transmitted / received (steps 462, 464, 466) between the host 402, 404, and 408 is transmitted and received for each destination IP address destined for each of the hosts 402, 404, and 466, respectively. Next, an operation process of an ACR in which a plurality of hosts support access to one gateway MS in a wireless communication system according to an embodiment of the present invention will be described in detail with reference to FIG. 5.

5 is a diagram illustrating an operation of an ACR supporting multi-host connection in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 5, first, in step S510, the ACR performs an initial access procedure with the RAS that manages the gateway MS as described above. To control. Then, in step S520, the ACR generates and allocates an ISF of the gateway MS to provide services to hosts to be provided with services by accessing the gateway MS and controls the generation of an ISF for the gateway MS of the RAS. do.

Next, in step S530, the ACR connects to the gateway MS and the gateway MS in response to performing a DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure between all the hosts to be provided with the service and the gateway MS. A DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure is performed, and a HA and PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedure is performed. At this time, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure with the gateway MS and the PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedure with the HA are performed as described above. The number of executions of the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure is the same as that of the number of hosts to be connected to the gateway MS.

In this manner, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure and the PMIP version 4 / PMIP version 6 (PMIPv4 / v6) processing procedure with the HA are performed as many times as the number of hosts. In step S540, the ACR determines whether there is a service flow to be provided by hosts connected to the gateway MS, that is, a service flow identifier (SFID) of the gateway MS. Check for existence. If the SFID exists in step S540, the process proceeds to step S550. In step S550, the ACR generates the SFID of the gateway MS and uses the service flow classification rule to assign the IP assigned to the generated SFID. Add to service flow classification rule.

Then, in step S560, the ACR adds a dynamic service addition (DSA: Dynamic Service Addition) (DSA) / dynamic service change (DSC) in accordance with the added service flow classification rule. (Hereinafter, referred to as 'DSC'), that is, after performing a DSA / DSC operation according to a service type that hosts connected to the gateway MS are to receive, providing data by transmitting and receiving data traffic with the hosts. do. On the other hand, if the SFID does not exist in step S540, the process proceeds to step S570, and in step S570, the ACR adds the newly allocated IP to the existing SFID to the service flow classification rule using the service flow classification rule. In step S560, the DSA / DSC operation is performed according to the classified service flow. Next, an operation process of the gateway MS supporting the connection of a plurality of hosts in the wireless communication system according to an embodiment of the present invention will be described in detail with reference to FIG. 6.

6 is a diagram illustrating an operation of a gateway MS supporting a multi-host connection in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, first, in step S610, the gateway MS performs an initial access procedure with the RAS so that a plurality of hosts can be connected, that is, performs an entry into the network and an authentication procedure. Then, in step S620, the gateway MS generates an ISF with the ACR through RAS to provide services to hosts that want to access the service.

Next, in order to obtain IP addresses of all hosts to be provided with the service in step S630, each host performs a DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure and performs DHCP with each of the hosts. The ACR and DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedures are performed corresponding to the version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedures. Here, the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure with the ACR is equal to the number of times of performing the DHCP version 4 / DHCP version 6 (DHCPv4 / DHCPv6) processing procedure with the hosts. That is, the same number of times as the number of hosts to connect to the gateway MS is performed.

Then, in step S640, the gateway MS provides a service to hosts by performing DSA / DSC operations with each host to receive a service for each IP address acquired by the host corresponding to the service to be provided by the hosts. After generating the flow for, proceeds to step S650. Then, in step S650, the gateway MS checks whether there is a service to be provided to hosts connected to it, that is, whether there is an SFID of the gateway MS.

If the SFID exists in step S650, the flow proceeds to step S660. In step S660, the gateway MS generates the SFID, and then classifies the service flow using the IP assigned to the generated SFID as a service flow classification rule. Add to rule On the other hand, if the SFID does not exist in step S650, the process proceeds to step S670. In step S670, the gateway MS adds the newly allocated IP to the existing SFID to the service flow classification rule using the service flow classification rule. .

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

1 schematically illustrates the structure of a wireless communication system in accordance with an embodiment of the present invention;

2 is a diagram schematically illustrating a connection related protocol stack of a host in a wireless communication system according to an embodiment of the present invention.

3 is a diagram schematically illustrating a procedure in which a plurality of hosts are connected to a gateway MS and provided with a service in a wireless communication system according to an exemplary embodiment of the present invention.

4 is a diagram illustrating a service providing procedure when a gateway MS to which a plurality of hosts are connected is handed over in a wireless communication system according to an exemplary embodiment of the present invention.

5 is a diagram illustrating an operation process of an ACR supporting a multi-host connection in a wireless communication system according to an embodiment of the present invention.

6 is a flowchart illustrating an operation of a gateway MS supporting a multi-host connection in a wireless communication system according to an embodiment of the present invention.

Claims (22)

An access control router (ACR) for controlling the mobile station through a plurality of hosts, a mobile station supporting a gateway to the plurality of hosts, and a radio access station (RAS) connected to the mobile station. In a communication system including a control router (HA) and a home agent (HA) for transmitting data to the access control router, a method for supporting the connection of the plurality of hosts, The mobile station processing the hosts and a Dynamic Host Configuration Protocol (DHCP), respectively; Repeatedly processing, by the access control router, the mobile station and the dynamic host configuration protocol at the same number of times as the number of dynamic host configuration protocols with the hosts; The home agent repeatedly processing the access control router and the proxy mobile internet protocol (PMIP) at the same number of times as the number of dynamic host configuration protocols with the hosts; And said hosts are connected to said mobile station, respectively. The method of claim 1, And the number of times of processing of the dynamic host configuration protocol and the number of times of processing of the proxy mobile internet protocol are determined by the number of hosts to connect to the mobile station. The method according to any one of claims 1 to 2, When the connection with all the hosts to which the mobile station is to be connected is completed, the home agent transmits data to the hosts through the access control router, the wireless access station, and the mobile station. Connection support method comprising the. The method of claim 3, The transmitting of the data may include transmitting data including a destination Internet Protocol (IP) address destined for each of the hosts. The method of claim 4, wherein In the step of transmitting the data, the connection control router transmits the data to the wireless access station using the same Generic Routing Encapsulation (GRE) key, and the wireless access station has the same connection identifier (CID: Connection). And transmitting the data to the mobile station using an identifier. The method of claim 4, wherein In the transmitting of the data, the home agent and the mobile station transmit the data for each of the destination Internet protocol addresses. The method of claim 3, When the connection with all the hosts to be connected with the mobile station is completed, the access control router generates and classifies a service flow to be provided by the hosts, and then the home agent transmits the data to the mobile station. Connection support method. The method of claim 3, If the mobile station hands over to a target radio access station in a target access control router that is different from the access control router while transmitting the data to the hosts, the access control router sends context information of the mobile station to the target. And transmitting to a connection control router. The method of claim 8, And the home agent repeatedly processing the target access control router and the proxy mobile internet protocol at the same number of times as the number of processing the proxy mobile internet protocol with the access control router. The method of claim 9, And repeatedly processing the proxy mobile internet protocol with the target access control router, updating the internet protocol address obtained by the mobile station in the target access control router. In systems that support connections, With multiple hosts, A mobile station supporting a gateway to the plurality of hosts; An access control router (ACR) for controlling the mobile station through a radio access station (RAS) connected to the mobile station; A home agent (HA) for transmitting data to the access control router, The mobile station processes the hosts and the Dynamic Host Configuration Protocol (DHCP), respectively, and the access control router processes the dynamic station and the dynamics in the same number of times as the number of times of the dynamic host configuration protocol processing with the hosts. Iteratively processes a host configuration protocol, and the home agent repeatedly processes the access control router and Proxy Mobile Internet Protocol (PMIP) at the same number of times as the number of dynamic host configuration protocol processing with the hosts. And the hosts each connect to the mobile station. The method of claim 11, And the number of times of processing of the dynamic host configuration protocol and the number of times of processing of the proxy mobile internet protocol are determined by the number of the hosts to connect to the mobile station. The method according to any one of claims 11 to 12, When the connection with all the hosts to which the mobile station wants to connect is completed, the home agent transmits data to be transmitted to the hosts to the hosts through the access control router, the wireless access station, and the mobile station. Connection support system. The method of claim 13, The home agent, the access control router, the wireless access station, and the mobile station include a destination Internet Protocol (IP) destined for each of the hosts in the data and transmit the connection support. system. The method of claim 14, The access control router transmits the data to the wireless access station using the same Generic Routing Encapsulation (GRE) key, and the wireless access station transmits the data using the same connection identifier (CID). And transmitting to the mobile station. The method of claim 14, And the home agent and the mobile station transmit the data for each of the destination internet protocol addresses. The method of claim 13, A target radio access station connected to the mobile station and a target access control router controlling the mobile station through the target radio connection when the mobile station moves to another cell and performs a handover while transmitting the data to the hosts; And the target access control router receives context information of the mobile station from the access control router. The method of claim 17, And the home agent repeatedly processes the target connection control router and the proxy mobile internet protocol at the same number of times as the number of processing of the proxy mobile internet protocol with the connection control router. A method for supporting connection of a mobile station in a broadband wireless access communication system, Configuring service flow classification rule information corresponding to Internet Protocol (IP) addresses of the hosts connected to the mobile station in accordance with a Dynamic Host Configuration Protocol (DHCP) processing procedure; Receiving data traffic from the base station including the same connection identifier (CID) and a destination Internet protocol address of one of the Internet protocol addresses of the hosts for each service flow of the hosts; And transmitting the data traffic to a host corresponding to the destination internet protocol address according to the service flow classification rule information. The method of claim 19, The dynamic host configuration protocol processing procedure is performed by the mobile station processing the dynamic host configuration protocol separately from each of the hosts. A method for supporting connection of a access control router in a broadband wireless access communication system, Configuring service flow classification rule information corresponding to Internet Protocol (IP) addresses of the hosts connected to the mobile station in accordance with a Dynamic Host Configuration Protocol (DHCP) processing procedure; Data traffic including the same one Generic Routing Encapsulation (GRE) key for each of the service flows of the hosts corresponding to the service flow classification rule information and the destination Internet protocol address of one of the Internet protocol addresses of the hosts. Transmitting from the base station. The method of claim 21, The dynamic host configuration protocol processing procedure is performed by the mobile station processing the dynamic host configuration protocol separately from each of the hosts.

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