WO2008123752A1

WO2008123752A1 - Wibro system and method of setting data path thereof

Info

Publication number: WO2008123752A1
Application number: PCT/KR2008/002015
Authority: WO
Inventors: Jin-Hyoung Kim
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2007-04-10
Filing date: 2008-04-10
Publication date: 2008-10-16
Anticipated expiration: 2009-10-10
Also published as: KR100859810B1

Abstract

A WiBro system and a method for establishing a data path for the Wi Bro system in which the QoS of a WiBro service is ensured by supporting the WiBro service via an MPLS network. The wireless broadband system may include a controller transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network-specific path resources setting request information to an MPLS network. The MPLS network designates controller-specific resources according to the MPLS network-specific path resources setting request information received from the controller, and transmits mobile station-specific data path setting request information and base station-specific path resources setting information to a base station. The base station designates MPLS network-specific resources according to the MPLS network-specific path resources setting request information.

Description

WIBRO SYSTEM AND METHOD OF SETTING DATA PATH

THEREOF

Technical Field

[1] The present invention relates generally to Wireless Broadband (WiB ro) systems and methods for setting data paths therefor, and, more particularly, to multi-protocol label switching networks and to the processes for operation of multi-protocol label switching networks. Background Art

[2] In response to the rapid development of computer, electronics and communication technology, various wireless communication services using wireless networks are being provided to telecommunication service providers and to their subscribers. Accordingly, services provided by mobile communication systems using wireless networks are expanding from voice services to multimedia communication services that transmit various types, categories and formats of data and other information, such as circuit data and packet data.

[3] Recently, the development of telecommunication technology brought into service devices and equipment conforming to such industry wide standards known as the International Mobile Telecommunication-2000 (familiarly known as IMT-2000), is the global standard for third generation (3G) wireless communication systems, such as Code Division Multiple Access (CDMA) 2000 IX, 3X, EV-DO, and WideBand CDMA (WCDMA).

[4] The IMT-2000 is defined by a set of interdependent ITU recommendations to provide international standardization, including frequency spectrum and technical specification for radio and network components, in order to provide a framework for worldwide wireless access by linking the diverse systems of terrestrial and satellite based networks, and digital mobile telecommunications in order to assure fixed and mobile wireless access systems. Under IMT-2000, a wireless communication system aims to support personal mobility and service mobility while realizing worldwide direct roaming, high voice quality having the same level as wired telephones, high speed packet data services, various application services due to the combination of wired and wireless networks, and so on. When conforming to IMT-2000, a system will be able to deliver not only improved quality of conventional voice and WAP services but also various multimedia services (e.g., AOD, VOD) at a higher speed than was attained with earlier systems.

[5] High speed wireless Internet services have the following drawbacks however: A wireless Internet service is expensive because of the substantial capital costs required to build base stations for a wireless communication system. Furthermore, available content is also limited due to the small screen size of mobile stations and other user equipment.

[6] Moreover, Wireless Local Area Network (WLAN) technology can provide only limited public services owing to some problems such as electromagnetic interference and limited coverage. Accordingly, a Wireless Broadband Internet (WiBro) system capable of providing high speed Internet services at a low cost while ensuring portability and mobility is gaining popularity. The WiBro system is defined in IEEE 802.16e.'

[7] A WiBro service is an Internet Protocol (IP) based wireless data system that allows a user, who may be in an indoor or outdoor stationary environment or a mobile environment such as walking or low speed moving, to access the Internet using a WiBro terminal or WiBro station (e.g., a notebook computer, a PDA and a handheld PC) in order to acquire various types of information and contents. In addition, the WiBro system provides mobility at a relatively high speed of 60km/h, and has asymmetric transmission characteristics with a downloading speed of 24.8Mbps and an uploading speed of 5.2Mbps

[8] The WiBro station not only supports a wireless Internet access but also provides various additional functions such as camera and portable storage functions.

[9] In particular, a WiBro (802.16e) station is wirelessly connected to a WiBro base station, which is also referred to as "BS," and then is wired to the Internet. The WiBro base station is connected to a core network of a service provider, which includes an Authentication, Authorization and Accounting (AAA) server.

[10] Typically, and as is explained in greater detail in the following Detailed Description, when a WiBro station enters a WiBro network, the WiBro station (hereinafter, referred to as "MS") exchanges a Down Link MAP (DL-MAP) message and an Up Link MAP (UP-MAP) with a wireless base station or a Radio Access Station (RAS), and the MS acquires up/down link channel information by exchanging a Down-link Channel Describer (DCD) message and an Up-link Channel Describer (UCD) message with the RAS, and performs an initial ranging procedure in order to synchronize a system channel in an up link to the RAS.

[11] At initial network entry, the MS sets a data path between the RAS and the ACR through procedures of transmitting the RR-Request message, RR-Response message and the RR-Confirm message.

[12] A Generic Routing Encapsulation (GRE) tunnel using a GRE key has been proposed for the data path set between the RAS and the ACR.

[13] It is also possible to set a data path between the RAS and the ACR through a label of Multi-Protocol Label Switching (MPLS). While IP forwarding is used in the data path based upon the GRE tunnel, label switching is used in the data path based upon the MPLS label. Advantageously, the QoS function of the MPLS is used.

[14] In a process in which the data path between the RAS and the ACR is an End-to-End

Signaling process, the RAS and the ACR can be connected through an Intermediate Network (e.g., an MPLS network), but the Intermediate Network will not recognize the process of setting the data path which is enabled between the RAS and the ACR. Accordingly, the MPLS network connecting between the RAS and the ACR can not dynamically support the WiBro network. Disclosure of Invention Technical Problem

[15] In other processes where the RAS and the ACR sets the data path by transmitting/ receiving the RR-Request message, the RR-Response message and the RR-Confirm message through an MPLS Router of the MPLS network, that MPLS Router characterizes the messages, transmitted/received between the RAS and the ACR for setting the data path, as ordinary data packets, and is unable to recognize that the RR-Request message, the RR-Response message and the RR-Confirm message, transmitted/ received between the RAS and the ACR, are messages essential to setting-up the data path, and consequently fails to guarantee QoS in the WiBro network. Technical Solution

[16] It is one object of the present invention to provide an improved multi-protocol label switching network and an improved process for operation of multi-protocol label switching networks.

[17] It is another object to provide a WiBro system and a method of setting a data path thereof, in which the QoS of a WiBro service is ensured by supporting the WiBro service via an MPLS network.

[18] According to an aspect of the invention, a wireless broadband system may be constructed with a controller transmitting mobile station-specific data path setting information and transmitting multi-protocol label switching (MPLS) network- specific path resources setting request information to an MPLS network. The MPLS network designates controller- specific resources in conformance with the MPLS network- specific path resources setting request information received by the MPLS network from the controller, and the MPLS network transmits the mobile station- specific data path setting request information and the base station-specific path resources setting information to a base station. The base station is then able to designate MPLS network- specific resources in accordance with the MPLS network-specific path resources setting request information received from the MPLS network. [19] The mobile station-specific data path setting information may include at least one item of information selected from the group consisting of mobile station ID, service flow ID and base station IP address.

[20] The MPLS network-specific path resources setting information may include at least one item of information selected from the group consisting of upstream label information for setting a label switched path (LSP) in an upstream direction from the MPLS network to the controller, and label request information that represents a label for the LSP between the controller and the MPLS network.

[21] The base station-specific path resources setting information may include at least one item of information selected from the upstream label information for setting a label switched path (i.e., a LSP) in an upstream direction from the base station to the MPLS network, and the label request information that represents a label of the LSP between the base station and the MPLS network.

[22] According to another aspect of the invention, the wireless broadband system may include a controller able to transmit mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information, on a first resource reservation protocol (RSVP) path message, to an MPLS network, and to transmit a rerouting confirmation message, in an RSVP reservation confirmation message, to the MPLS network according to path resources reservation confirmation information contained in a first RSVP reservation message received from the MPLS network. The MPLS network establishes controller- specific resources according to the path resources setting request information received in the first RSVP path message, and transmits mobile station-specific data path setting request information and base station-specific path resources setting information, on a second RSVP path message, to a base station; the MPLS network transmits controller- specific path resources reservation confirmation information, in the first RSVP reservation message, to the controller according to the path resources reservation confirmation information received in a second RSVP reservation message from the base station, and transmits an RSVP reservation confirmation message received from the controller to the base station; and the base station, after completing the designation of MPLS network- specific resources in conformance with the path resources setting request information received from the MPLS network in the second RSVP path message, transmits MPLS network-specific path resources reservation confirmation information, in the second RSVP reservation message, to the MPLS network.

[23] The mobile station-specific data path setting information may include at least one item of information selected from the group consisting of the mobile station ID, the service flow ID and the base station IP address.

[24] The MPLS network-specific path resources setting information may include at least one item of information selected from the group consisting of an upstream label object for establishing a label switched path (LSP) in an upstream direction from the MPLS network to the controller, and a label request object that represents a label for the LSP between the controller and the MPLS network.

[25] The base station-specific path resources setting information may include at least one item of information selected from an upstream label object for establishing a LSP in an upstream direction from the base station to the MPLS network, and a label request object representing a label for the LSP between the base station and the MPLS network.

[26] The mobile station-specific data path setting information may be transmitted or received in a session object of each of the first RSVP path message, the first RSVP reservation message, the second RSVP path message, and the second RSVP reservation message.

[27] According to a further aspect of the invention, the method for setting a data path of a wireless broadband service system contemplates procedures of a controller transmitting mobile station-specific data path setting information transmitting and multi-protocol label switching (MPLS) network- specific path resources setting request information to an MPLS network; the MPLS network setting controller-specific resources in accordance with the MPLS network- specific path resources setting request information from the controller, and transmitting mobile station-specific data path setting request information and base station-specific path resources setting information to a base station; and the base station designating MPLS network- specific resources in conformance with the MPLS network-specific path resources setting request information.

[28] According to yet another aspect of the invention, the method for setting a data path of a wireless broadband service system contemplates procedures for a controller transmitting mobile station-specific data path setting information and transmitting multi-protocol label switching (MPLS) network- specific path resources setting request information, in a first resource reservation protocol (RSVP) path message, to an MPLS network; the MPLS network designating controller-specific resources in accordance with the path resources setting request information contained in the first RSVP path message, and transmitting mobile station- specific data path setting request information and transmitting base station- specific path resources setting information, in a second RSVP path message, to a base station; the base station, after completion of the designation of MPLS network- specific resources in conformance with the path resources setting request information contained in the second RSVP path message, transmitting MPLS network- specific path resources reservation confirmation information, in a second RSVP reservation message, to the MPLS network; the MPLS network, transmitting controller- specific path resources reservation confirmation information, in a first RSVP reservation message, to the controller in accordance with the path resources reservation confirmation information received in the second RSVP reservation message from the base station; and the controller, transmitting a rerouting confirmation message, in an RSVP reservation confirmation message, to the MPLS network in accordance with the path resources reservation confirmation information received in the first RSVP reservation message from the MPLS network. [29] The method further contemplates a procedure of the MPLS network transmitting the

RSVP reservation confirmation message to the base station.

Advantageous Effects

[30] The WiBro system and the method for establishing a data path for the WiBro system can ensure the QoS of a WiBro service by supporting the WiBro service via an MPLS network.

[31] The present invention describes the details for implementing and using various embodiments of the principles of the present invention, in which, by way of example, a WiBro system and a method for establishing a data path for the Wi Bro system in which the QoS of a WiBro service is ensured by supporting the WiBro service via an MPLS network. The wireless broadband system may include a controller transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information to an MPLS network. The MPLS network designates controller-specific resources according to the MPLS network- specific path resources setting request information received from the controller, and transmits mobile station-specific data path setting request information and base station-specific path resources setting information to a base station. The base station designates MPLS network- specific resources according to the MPLS network- specific path resources setting request information. Brief Description of the Drawings

[32] FIG. 1 is a diagram illustrating an analysis of the flow of signals typically transmitted in a WiBro network system;

[33] FIG. 2 is a diagram illustrating a plurality of RASs and an ACR connected through an intermediate network;

[34] FIG. 3 is a diagram illustrating the flow of signal transmissions during the establishment of a data path between an RAS and an ACR through an MPLS network;

[35] FIG. 4 is a diagram illustrating the flow of signal transmissions during the establishment of a data path between an RAS and an ACR through an MPLS network in accordance with to an embodiment of the principles of the present invention;

[36] FIG. 5 is a view illustrating the format of an RSVP message written according to the principles of the present invention; and

[37] FIG. 6 is a diagram illustrating the flow of signal transmissions during the establishment of a data path between an RAS and an ACR through an MPLS network in accordance with another embodiment of the principles of the present invention. Best Mode for Carrying Out the Invention

[38] Hereinafter, a WiBro system and a method of setting a data path thereof via an

MPLS network will be described more fully with reference to the accompanying drawings, in which the same reference numerals and signs are used throughout the different drawings to designate the same or similar components for the sake of clarity.

[39] For the sake of clarity, as used in this application,

[40] AOD indicates audio on demand entertainment services;

[41] VOD indicates video on demand amusement services;

[42] WAP services indicates wireless application protocol, which is an open international standard for applications that use wireless communication, principally to enable access to the Internet from a mobile telephone or PDA;

[43] WiBro refers to a Wireless Broadband Internet (WiBro) system capable of providing high speed Internet services; and

[44] WLAN indicates Wireless Local Area Network, which is a technique able to provide limited public services to subscribers.

[45] Turning now to the drawings, FIG. 1, a description will be made of a signal processing process when a WiBro station enters a WiBro network.

[46] As shown in FIG. 1, a WiBro station (hereinafter, referred to as "MS") exchanges a

Down Link MAP (DL-MAP) message and an Up Link MAP (UP-MAP) with a wireless base station or a Radio Access Station (RAS) (Sl).

[47] The MS acquires up/down link channel information by exchanging a Down-link

Channel Describer (DCD) message and an Up-link Channel Describer (UCD) message with the RAS (S2). The MS performs an initial ranging procedure in order to synchronize a system channel in an up link to the RAS (S3). The MS transmits a ranging request (RNG-REQ) message through an up-link channel acquired by the initial ranging, and the RAS transmits a ranging response (RNG-RSP) to the MS in response to the RNG-REQ message, so that the ranging procedure is completed. Through this ranging procedure, the MS is allocated with a connection identifier (CID) such as a basic CID or a primary CID (S4). Then, the MS transmits/receives an authorization policy by exchanging a Subscriber Station Basic Capability Request (SBC-REQ) message and an SBC response (SBC-RSP) message with an Access Control Router (ACR) (S5). The MS performs an EAP authentication with the ACR in order to access a WiBro network through a specific Extensible Authentication Protocol (EAP) (S6). Then, the MS performs a Security Association (SA) and a key exchange with the RAS (S7). The MS transmits a registration request (REG-REQ) message to the RAS, and receives a registration response (REG-RSP) message therefrom (S8). The ACR, the RAS and the MS transmit and receive a rerouting request (RR- Request) message, a dynamic service addition request (DSA-REQ) message, a dynamic service addition response (DSA-RSP) message, a rerouting response (RR-Response) message, a rerouting confirm (RR-Conform) message and a dynamic service addition acknowledgment (DSA-ACK) message (S9 to S 14). The MS performs an IP addressing with an AAA server (S15).

[48] At initial network entry, the MS establishes a data path between the RAS and the

ACR through procedures of transmitting the RR-Request message, RR-Response message and the RR-Confirm message.

[49] For the data path established between the RAS and the ACR, a Generic Routing Encapsulation (GRE) tunnel using a GRE key is proposed.

[50] It is also possible to establish a data path between the RAS and the ACR through a label of Multi-Protocol Label Switching (MPLS). While IP forwarding is used in the data path based upon the GRE tunnel, label switching is used in the data path based upon the MPLS label. Advantageously, the QoS function of the MPLS is used.

[51] A process of setting the data path between the RAS and the ACR is an End-to-End

Signaling process. The RAS and the ACR can be connected through an Intermediate Network (e.g., an MPLS network) as shown in FIG. 2.

[52] The Intermediate Network does not recognize the process of establishing the data path, which is enabled between the RAS and the ACR. Accordingly, the MPLS network connecting between the RAS and the ACR is unable to dynamically support the WiBro network.

[53] As shown in FIG. 3, the RAS and the ACR sets the data path by transmitting/ receiving the RR-Request message, the RR-Response message and the RR-Confirm message through an MPLS Router of the MPLS network.

[54] In the MPLS network however, the MPLS Router does not recognize that the RR-

Request message, the RR-Response message, and the RR-Confirm message, transmitted/received between the RAS and the ACR, constitute messages for establishing the data path. Instead, the MPLS Router recognizes these messages as constituting mere typical packets, rather than as messages which have been transmitted/ received between the RAS and the ACR in order to enable the establishment of the data path, and thus this MPLS network is inadequate and unreliable for use in contemporary telecommunication systems because the MPLS network fails to guarantee QoS in the WiBro network.

[55] FIG. 4 is a diagram illustrating signal flows for setting a data path between an RAS and an ACR through an MPLS network in one embodiment of the principles of the present invention.

[56] As shown in FIG. 4, an ACR transmits information necessary for setting a data path, on a resource reservation protocol (RSVP) Path message, to an MPLS router (S50).

[57] The information necessary for setting a data path includes MS ID, service flow

(SFID) ID, RAS IP address and so on, and as shown in FIG. 5, can be included in a session object of the RSVP Path message.

[58] The session object is set as a session in an object class, and, more particularly, as

LSP_TUNNEL_WIBRO_MS C-TYPE = 7. Here, LSP_TUNNEL_WIBRO_MS C- TYPE = 7 represents that an IP address system, supported by a Label Switched Path (LSP) tunnel for a WiBro service, is an IPv4 address system.

[59] It can be appreciated that the session object includes MS ID, SFID, RAS IP (IPv4)

Address and so on.

[60] The session object is included not only in the RSVP Path message, but is also included in an RSVP RESV message.

[61] The RSVP Path message, transmitted from the ACR to the MPLS router, includes a first upstream label object for setting an LSP in an upstream direction and a first label request object for setting a label of the LSP between the ACR and the MPLS router.

[62] The MPLS router stores a first upstream label, sent from the MPLS router to the

ACR, using the first upstream label object, included in the RSVP Path message from the ACR, and sets a first label of the LSP between the ACR and the MPLS router according to the label request object.

[63] The MPLS router transmits a second upstream label object for setting the LSP in the upstream direction, a second label request object for setting the label of the LSP between a downstream MPLS router or the RAS and the MPLS router, and a session object, on the RSVP Path message, to the RAS (S51).

[64] The RAS stores the second upstream label object, sent from the RAS to the MPLS router, using a second upstream label object, included in the RSVP message from the MPLS router, and sets a second label of the LPS between the ACR and the MPLS router according to the label request object.

[65] The RAS transmits the second label (LABEL) and resource reservation confirmation

(RESV-CONFIRM) information between the MPLS router and the ACR, in the RSVP RESV message, to the MPLS router (S52).

[66] The MPLS router stores the second label according to the resource reservation confirmation information, included in the RSVP RESV message transmitted from the RAS, and transmits the first label and the resource reservation confirmation information between the MPLS router and the ACR, in the RSVP RESV message, to the ACR (S53). [67] The ACR stores the first label in accordance to the resource reservation confirmation information exchanged between the MPLS router and the ACR, included in the RSVP

RESV message from the MPLS router, and generates and transmits an RR-Confirm message to the MPLS router (S54). [68] The MPLS router transmits the RSVP RESV-Confirm message, sent from the ACR, to the RAS (S55). [69] FIG. 6 is a diagram illustrating signal flows for establishing a data path between an

RAS and an ACR through an MPLS network in accordance with the principles of another embodiment of the principles of the present invention. [70] As shown in FIG. 6, a signal processor 64 of the ACR sends information necessary for establishing a data path, such as MS ID, SFID and RAS IP, in an RR-Request message, to an RSVP processor 63 (S60). [71] RSVP processor 63 adds the information, included in the RR-Request message from the signal processor 64, to a Session Object (Obj), and generates a first upstream label object (Upstream Obj) for establishing an LSP in an upstream direction and a first label request object (Label Req Obj) for designating a label for the LSP between the ACR and the MPLS router. [72] RSVP processor 63 transmits the Session Obj, the first Upstream Obj and the first

Label Req Obj, in an RSVP Path message, to the MPLS router of the MPLS network

(S61). [73] RSVP processor 62 of the MPLS router stores a first upstream label, sent from the

MPLS router to the ACR, using the first Upstream Obj, included in the PSVP message transmitted from the ACR, and designates a first label of the LSP between the ACR and the MPLS router according to the Label Req Obj. [74] RSVP processor 62 generates a second Upstream Obj for setting the LSP in an upstream direction and a second Label Req Obj for designating the label of the LSP between the downstream MPLS router or the RAS and the MPLS router. [75] RSVP processor 62 transmits the RSVP PATH message from the ACR, including the

Session Obj, the second Upstream Obj and the second label object, to the RAS (S62). [76] RSVP processor 61 of the RAS stores a second upstream label, sent from the RAS to the MPLS router, using the second Upstream Obj, included in the PSVP message transmitted from the MPLS router, and designates a second label of the LSP between the ACR and the MPLS router according to the Label Req Obj. [77] Then, RSVP processor 61 sends information included in the session Obj, such as MS

ID, SFID and RAS IP, on the RR-Request message, to signal processor 60 (S63). [78] Signal processor 60, in response to the RR-Request message from the RSVP processor 61, generates and sends an RR-Response message to the RSVP processor 61

(S64). [79] When the RR-Response message is received from the signal processor 60, the RSVP processor 61 transmits the second label (LABEL) and resource reservation confirmation (RESV_CONFIRM) information, on an RSVP RESV message, to the MPLS router (S65).

[80] RSVP processor 62 of the MPLS router stores the second label in accordance with the RESV_CONFIRM information, included in the RSVP RESV message received from the RAS, and transmits the first label (LABEL) and resource reservation confirmation (RESV_CONFIRM) information between the MPLS router and the ACR, in the RSVP RESV message, to the ACR (S66).

[81] RSVP processor 63 of the ACR stores the first label in accordance with the resource reservation confirmation information between the MPLS router and the ACR, included in the RSVP RESV message from the MPLS router, and generates and sends an RR- Response message to signal processor 64 (S67).

[82] When the RR-Response message is received from RSVP processor 63, the signal processor 64 generates, and sends an RR-Confirm message to RSVP processor 63 (S68).

[83] RSVP processor 63 transmits the RR-Confirm message from the signal processor 64, on an RSVP RESV Confirm message, to the MPLS router (S69).

[84] RSVP processor 62 of the MPLS router transmits the RSVP RESV-Confirm message from the ACR to the RAS (S70).

[85] The RSVP processor 61 of the RAS sends the RR-Confirm message, included in the

RSVP RESV Confirm message, to the signal processor 60 (S71).

[86] While the present invention has been shown and described in connection with the preferred embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

[1] A wireless broadband system comprising: a controller transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information to an MPLS network; the MPLS network designating controller-specific resources in accordance with the MPLS network-specific path resources setting request information received from the controller, and transmitting mobile station-specific data path setting request information and base station-specific path resources setting information to a base station; and the base station designating MPLS network- specific resources in accordance with the MPLS network-specific path resources setting request information.

[2] The wireless broadband system according to claim 1, wherein the mobile station- specific data path setting information includes at least one item of information selected from the group consisting of mobile station ID, service flow ID, and base station IP address.

[3] The wireless broadband system according to claim 1, wherein the MPLS network- specific path resources setting information includes at least one item of information selected from the group consisting of upstream label information for establishing a label switched path (LSP) in an upstream direction from the MPLS network to the controller and label request information representing a label for the LSP between the controller and the MPLS network.

[4] The wireless broadband system according to claim 1, wherein the base station- specific path resources setting information includes at least one item of information selected from upstream label information for establishing a LSP in an upstream direction from the base station to the MPLS network and label request information representing a label for the LSP between the base station and the MPLS network.

[5] A wireless broadband system comprising: a controller transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information, in a first resource reservation protocol (RSVP) path message, to an MPLS network, and transmitting a rerouting confirmation message, in an RSVP reservation confirmation message, to the MPLS network in accordance with path resources reservation confirmation information contained in a first RSVP reservation message from the MPLS network; the MPLS network designating controller-specific resources according to the path resources setting request information in the first RSVP path message, transmitting mobile station-specific data path setting request information and base station-specific path resources setting information, in a second RSVP path message, to a base station, transmitting controller-specific path resources reservation confirmation information, in the first RSVP reservation message, to the controller according to path resources reservation confirmation information received in a second RSVP reservation message from the base station, and transmitting an RSVP reservation confirmation message received from the controller to the base station; and the base station, after designation of MPLS network-specific resources in accordance with the path resources setting request information received in the second RSVP path message, transmitting MPLS network- specific path resources reservation confirmation information, in the second RSVP reservation message, to the MPLS network.

[6] The wireless broadband system according to claim 5, wherein the mobile station- specific data path setting information includes at least one item of information selected from the group consisting of mobile station ID, service flow ID, and base station IP address.

[7] The wireless broadband system according to claim 5, wherein the MPLS network- specific path resources setting information includes at least one item of information selected from the group consisting of an upstream label object for establishing a label switched path (LSP) in an upstream direction from the MPLS network to the controller and a label request object representing a label of the LSP between the controller and the MPLS network.

[8] The wireless broadband system according to claim 5, wherein the base station- specific path resources setting information includes at least one item of information selected from an upstream label object for establishing a LSP in an upstream direction from the base station to the MPLS network and a label request object representing a label for the LSP between the base station and the MPLS network.

[9] The wireless broadband system according to claim 5, wherein the mobile station- specific data path setting information is transmitted or received on a session object of each of the first RSVP path message, the first RSVP reservation message, the second RSVP path message, and the second RSVP reservation message.

[10] A method of setting a data path of a wireless broadband service system, comprising: at a controller, transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information to an MPLS network; at the MPLS network, setting controller-specific resources according to the

MPLS network- specific path resources setting request information received from the controller, and transmitting mobile station-specific data path setting request information and base station-specific path resources setting information to a base station; and at the base station, designating MPLS network- specific resources in accordance with the MPLS network-specific path resources setting request information.

[11] The method according to claim 10, wherein the mobile station- specific data path setting information includes at least one item of information selected from the group consisting of mobile station ID, service flow ID, and base station IP address.

[12] The method according to claim 10, wherein the MPLS network- specific path resources setting information includes at least one item of information selected from the group consisting of upstream label information for setting a label switched path (LSP) in an upstream direction from the MPLS network to the controller and label request information representing a label for the LSP between the controller and the MPLS network.

[13] The method according to claim 10, wherein the base station- specific path resources setting information includes at least one item of information selected from upstream label information for setting a LSP in an upstream direction from the base station to the MPLS network and label request information representing a label for the LSP between the base station and the MPLS network.

[14] A method of setting a data path of a wireless broadband service system, comprising: at a controller, transmitting mobile station-specific data path setting information and multi-protocol label switching (MPLS) network- specific path resources setting request information, in a first resource reservation protocol (RSVP) path message, to an MPLS network; at the MPLS network, designating controller-specific resources in accordance with the path resources setting request information in the first RSVP path message, and transmitting mobile station-specific data path setting request information and base station-specific path resources setting information, in a second RSVP path message, to a base station; at the base station, after designating MPLS network- specific resources in accordance with the path resources setting request information received in the second RSVP path message, transmitting MPLS network- specific path resources reservation confirmation information, in a second RSVP reservation message, to the MPLS network; at the MPLS network, transmitting controller-specific path resources reservation confirmation information, in a first RSVP reservation message, to the controller in accordance with the path resources reservation confirmation information received in the second RSVP reservation message from the base station; and at the controller, transmitting a rerouting confirmation message, in an RSVP reservation confirmation message, to the MPLS network in accordance with the path resources reservation confirmation information received in the first RSVP reservation message from the MPLS network.

[15] The method according to claim 14, further comprised of, at the MPLS network, transmitting the RSVP reservation confirmation message to the base station.

[16] The method according to claim 14, wherein the mobile station- specific data path setting information includes at least one item of information selected from the group consisting of mobile station ID, service flow ID, and base station IP address.

[17] The method according to claim 14, wherein the MPLS network- specific path resources setting information includes at least one item selected from the group consisting of an upstream label object for establishing a label switched path (LSP) in an upstream direction from the MPLS network to the controller and a label request object representing a label of the LSP between the controller and the MPLS network.

[18] The method according to claim 14, wherein the base station- specific path resources setting information includes at least one item of information selected from among an upstream label object establishing a LSP in an upstream direction from the base station to the MPLS network and a label request representing a label for the LSP between the base station and the MPLS network.

[19] The method according to claim 14, wherein the mobile station- specific data path setting information is transmitted or received in a session object of each of the first RSVP path message, the first RSVP reservation message, the second RSVP path message, and the second RSVP reservation message.