KR20060134451A - Ranging Methods in Mobile Internet - Google Patents

Abstract

The present invention relates to a ranging method in a portable Internet network including a personal subscriber station, a radio access station and an access control router.

Between a personal subscriber station (PSS), a radio access station (RAS), and an access control router (ACR) A method of performing ranging in a portable internet system having a ranging slot and a ranging code used for the ranging as ranging, the method comprising: (a) random among the ranging slots in the PSS; Select a ranging slot to generate a selective ranging slot, randomly select the ranging code used for initial ranging from an initial ranging domain, and generate a selective ranging code. Transmitting the selective ranging code to the RAS via the selective ranging slot; (b) the RAS transmitting a ranging response (RNG-RSP: Ranging-Response, hereinafter 'RNG-RSP') message to the PSS indicating that reception of the selected ranging code was successful; (c) the PSS receiving the RNG-RSP message, sending a ranging request (RNG-REQ: Ranging-Request, hereinafter 'RNG-REQ') message to the RAS; And (d) the RAS receiving the RNG-REQ message and transmitting an RNG-RSP (Success) message to the PSS as a response message to complete the initial ranging procedure. It provides a ranging method in the network.

By defining a ranging procedure for transmitting and receiving call signals between personal subscriber stations and radio access stations included in the portable Internet system, various failures, including access failures, handover failures, and service failures, may occur. There is an effect that can be prevented.

Description

Ranging method in portable internet network {Method for Performing Ranging for Use in Portable Internet System}

1 is a block diagram schematically illustrating a portable Internet system according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a method of performing initial ranging of a portable Internet system according to a preferred embodiment of the present invention.

3 is a flowchart illustrating a method of performing periodic ranging in a portable Internet system according to a preferred embodiment of the present invention;

4 is a flowchart illustrating a method of performing ranging of a portable Internet system when re-registering call setup in a handoff or idle mode according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: PSS 102: first RAS

104: first ACR 106: second RAS

108: second ACR 110: mobile Internet network

112: HA 114: AAA

116: LMS 118: Router

120: Internet

The present invention relates to a ranging method in a portable internet network. More specifically, by defining a ranging procedure for transmitting and receiving a call signal between a personal subscriber station and a radio access station included in the portable Internet system, the access failure, handover failure, service failure, etc. that may occur when using the mobile Internet service are included. SUMMARY OF THE INVENTION An object of the present invention is to provide a ranging method in a portable Internet network that prevents occurrence of various failures.

As information and communication technology has advanced rapidly, various wireless communication services using a wireless network have been provided. The most basic wireless communication service is a wireless voice call service that provides a voice call to a mobile subscriber wirelessly, which can provide a service regardless of time and place. On the other hand, in recent years, a wireless Internet service for providing an Internet service to a user of a mobile communication terminal through a wireless communication network has emerged. The current wireless Internet service uses Code Division Multiple Access (CDMA) 2000 1X, Evolution Data Optimized (EV-DO), Wideband CDMA (WCDMA), or other IS-95A and IS-95B networks. The 95C network provides wireless Internet with data rates up to 144 Kbps, much faster than 14.4 Kbps or 56 Kbps.

However, the existing mobile communication system that provides the wireless Internet service has a high base station construction cost, so the usage fee of the wireless Internet service is high, and the screen size of the mobile communication terminal is small, which limits the contents that can be used. There is a limit to providing the same high speed wireless Internet service. In addition, when using wireless local area network (WLAN) technology among wireless Internet services, there is a limit in providing wireless Internet services smoothly due to problems such as radio wave interference, narrow coverage, and service unavailable when moving. In this regard, a portable Internet (PI) or WiBro: Wireless Broadband Internet (PI) system that supports cellular mobility and handoff, and provides high-speed wireless Internet service at a low rate, has a transmission speed comparable to that of a WLAN.

The portable Internet system uses various types of terminals including laptops, PDAs (Personal Digital Assistants), handheld PCs (Personal Computers), etc. Means a communication system that can access to and use various information and contents. In addition, the portable Internet system is an IP (Internet Protocol) -based wireless data system that provides mobility of 60 km / h per hour, a downlink transmission speed of 24.8 Mbps, and an uplink transmission speed of 5.2 Mbps to provide asymmetric transmission.

In addition, the portable Internet system uses a 2.3 GHz frequency band, uses a time division duplex (TDD) in a duplex method to effectively use the allocated frequency spectrum, and uses a multiple access method. Orthogonal Frequency Division Multiple Access (OFDMA) is used.

In the OFDMA communication system, a ranging process is required in which a correct time offset is adjusted and power is adjusted between a transmitting side, that is, a base station and a receiving side, that is, a subscriber station.

Since the OFDMA communication system uses the OFDMA / OFDM scheme, ranging sub-channels and ranging codes are required in the ranging process, and the base station performs initial ranging according to the purpose and type of the ranging. Allocate available ranging codes, such as periodic ranging.

A portable Internet system having a base station operating based on a predetermined reference timing estimates the time taken for a signal transmitted from a terminal to reach the base station, and adjusts the transmission timing of each terminal. As a result of the adjustment, all terminal signals have the same timing. The base station is reached.

In this case, when the terminal newly accesses the system, a series of processes for measuring a signal transmission delay time to the base station is called initial ranging. Initial ranging is a ranging performed by a base station to acquire synchronization with a subscriber station. The ranging is performed to adjust an accurate time and frequency offset between the subscriber station and the base station and adjust transmission power.

Periodic ranging refers to ranging periodically performed by a subscriber station that adjusts a time offset and a transmission power with a base station through the initial ranging described above to adjust a base station and a channel state. The subscriber station performs periodic ranging by using ranging codes allocated for periodic ranging.

Depending on the purpose and type of ranging, there are various types such as bandwidth requirement ranging and network re-registration ranging (when re-registering call setup from a handoff, idle mode, etc.) in addition to the aforementioned initial ranging and periodic ranging.

In recent years, the mobile Internet system is being standardized, but the interface defined by BS (Base Station) (BS) in IEEE (IEEE 802.16e) is divided into RAS and ACR between mobile internet operators to exchange call signals with each other. The interface procedure is different among manufacturers manufacturing portable Internet systems because there is no standard, and the ranging procedure is not established between a personal subscriber station and a radio access station.

In order to solve the above problems, the present invention defines a ranging procedure for transmitting and receiving a call signal between a personal subscriber station and a radio access station included in the portable Internet system, thereby preventing access and handover failures that may occur when using the portable Internet service. SUMMARY OF THE INVENTION An object of the present invention is to provide a ranging method in a portable Internet network that prevents occurrence of various failures including a service failure.

Accordingly, according to a first object of the present invention, a personal subscriber station (PSS), a radio access station (RAS), and an access control router (Access) are provided. In the ranging between a control router (hereinafter referred to as 'ACR'), a method for performing various ranging in a portable internet system having a ranging slot and a ranging code used for the ranging, (a) In the PSS, a random ranging slot is randomly selected from the ranging slots to generate a selective ranging slot, and the ranging code used for initial ranging is randomly selected from an initial ranging domain. Selecting and generating a selection ranging code, and then transmitting the selection ranging code to the RAS through the selection ranging slot; (b) the RAS transmitting a ranging response (RNG-RSP: Ranging-Response, hereinafter 'RNG-RSP') message to the PSS indicating that reception of the selected ranging code was successful; (c) the PSS receiving the RNG-RSP message, sending a ranging request (RNG-REQ: Ranging-Request, hereinafter 'RNG-REQ') message to the RAS; And (d) the RAS receiving the RNG-REQ message and transmitting an RNG-RSP (Success) message to the PSS as a response message to complete the initial ranging procedure. It provides a ranging method in the network.

In addition, according to a second object of the present invention, a personal subscriber station (PSS), a radio access station (RAS), and an access control router (Access) In a method for performing various ranging in a portable Internet system having a ranging slot and a ranging code used for the ranging, ranging from a control router (hereinafter referred to as 'ACR'), (a) the PSS Performing initial ranging with the RAS; (b) after the initial ranging is successful, the PSS performs a re-registration ranging procedure in a handoff or idle mode; And (c) if the PSS transmits a ranging code to the RAS and then does not receive an RNG-RSP message as a response message, performing a periodic ranging procedure between the PSS and the RAS. It provides a ranging method in a portable Internet network characterized by performing the above steps.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram schematically illustrating a portable Internet system according to a preferred embodiment of the present invention.

The portable Internet system according to the preferred embodiment of the present invention is the PSS 100, the first RAS 102, the first ACR 104, the second RAS 106, the second ACR 108, the portable Internet network 110. ), HA 112, AAA 114, LMS 116, router 118, Internet 120, and the like.

In the process described below, the division of the RAS and the ACR into the first RAS 102, the second RAS 106, the first ACR 104, and the second ACR 108 is merely for convenience of description, The network 110 is connected to a number of RAS and ACR. However, the base station of the mobile Internet system that receives the first mobile Internet service request from the PSS (100) of the plurality of RAS connected to the mobile Internet network 110 to define the basis of the call signal exchange start and start the mobile Internet service Called the first RAS 102.

In addition, for convenience of description, the call signal generated by the PSS 100 is defined as a service request call signal for requesting a portable Internet service, and transmitted to grasp an operation state of a counterpart system among call signals generated by RAS or ACR. The call signal is defined as a query call signal, and the call signal transmitted to inform the operation status of the system in response to the call signal is defined as a response call signal.

In addition, the reference point 'A' is defined as a section in which an inquiry call signal and an answer call signal for controlling and confirming the state of each system between the first RAS 102 and the first ACR 104 are exchanged. In addition, the interval between the first ACR 104 and the second ACR 108 to control and confirm the state of each system and to exchange an inquiry call signal and an answer call signal for checking is defined as a reference point 'IR'.

First, at the reference point 'A', the first RAS 102 and the first ACR 104 perform authentication on the PSS 100 requesting access to the portable Internet network 110, and verify access rights. Register and release subscriber information of the PSS 100 to the portable Internet network 110, initialize the IP (Internet Protocol) assigned to the PSS 100, manage the portable Internet service procedure provided to the PSS 100, In addition, the PSS 100 that requests the use of the mobile Internet service is settled the billing, and performs a handover, such as to exchange the call signal for providing the mobile Internet. At the reference point 'IR', the first ACR 104 and the second ACR 108 exchange call signals for providing the mobile Internet such as map management of adjacent ACRs and handover between ACRs through the 'IR'.

A PSS (hereinafter referred to as a 'PSS') 100 refers to a portable terminal provided with a portable Internet service from a portable Internet system. The PSS 100 includes a low power radio frequency (RF) / IF (intermediate frequency) module, and includes a controller function, a variable control of a MAC (Media Access Control) frame according to a radio wave environment, a handover function, and authentication. And an encryption function. In addition, the PSS 100 is equipped with a browser for accessing the Internet for accessing the portable Internet system and using the portable Internet service.

Here, the PSS 100 may be a personal digital assistant (PDA), a handheld PC, a notebook PC, a smart phone, a multi-mode multi-band (MM-MB) terminal, or the like. In particular, a smart phone is a terminal that combines the advantages of a mobile communication terminal and a personal portable terminal, and includes a terminal that integrates data communication functions such as schedule management, fax transmission and Internet access, etc. it means. In addition, the multi-mode multi-band terminal has a multi-modem chip, and means a terminal that can operate not only in the portable Internet system but also in other mobile communication systems such as a CDMA 2000 system, a WCDMA system, and the like.

The first RAS 102 and the second RAS 106 are base stations of the portable Internet system, and wirelessly transmit packet data received from the first ACR 104 and the second ACR 108 to the PSS 100. It refers to the software that sends and receives the query call and the answer call signal at regular intervals through the reference points 'A' and 'IR', and the hardware associated therewith. RAS has controller function, orthogonal frequency division multiple access (OFDMA) / time division duplex (TDD) packet scheduling and channel multiplexing function, MAC frame variable control function according to service characteristics and propagation environment, 50 Mbps high speed traffic real time control function, handover Function and the like. In addition, the PSS 100 and the RAS include a 50 Mbps packet transmission modulation and demodulation function, a high speed packet channel coding function, and a real time modem control function for data transmission.

Here, the first RAS 102, the second RAS 106, the first ACR 104, and the second ACR 108 perform subscriber authentication on the PSS 100 that initially requests the mobile Internet service, and the subscriber. If authentication is successful, mobile internet service is provided.

The first ACR 104 and the second ACR 108 are base station controllers of a portable Internet system, and accommodate a plurality of RASs (the first RAS 102, the second RAS 106 in the drawing), and the first RAS ( A handover control function between the first RAS 102 and the second RAS 106 as a packet access router connecting the 102 and the second RAS 106 or the first RAS 102 and the portable Internet network 110. Handover function between the first ACR 104 and the second ACR 108, handover between the base station of the other network (for example, CDMA 2000 network, WCDMA network, etc.), the first RAS 102, the second RAS 104 It has a function, a packet routing function, an Internet access function, etc., and is connected to the portable Internet network 110.

The portable Internet network 110 is a backbone network for exchanging packet data with the PSS 100 and includes a plurality of network equipment such as a router. The portable Internet network 110 connects the first ACR 102, the second ACR 104, the HA 112, the AAA 114, the LMS 116, and the like, and provides an external packet data service such as the Internet 120. Packet data is received from the first ACR 104 and the second ACR 108.

HA (hereinafter referred to as 'HA') 112 performs a function of routing a packet transmitted from the outside through the Internet 120 when using a mobile IP in a mobile Internet system. It refers to software and hardware coupled thereto, and AAA (Authentication, Authorization and Accounting, hereinafter referred to as 'AAA') 114 in the PSS 100 in conjunction with the first ACR 104, the second ACR 108 It refers to software that performs charging for the used packet data and performs positioning on the PSS 100 in association with the LMS 116 and hardware coupled thereto.

The location management system (LMS) 114 hereinafter refers to software that manages subscriber's status information and location information, and hardware coupled thereto. The LMS 114 provides an incoming service to the PSS 100 from a specific node (for example, a switch connected to a mobile Internet network 110 or a mobile communication network (not shown), an application server connected to the Internet 120, etc.). In this case, the location information of the PSS 100 is retrieved and transmitted to the portable Internet network 110. The LMS 114 stores and manages subscriber status information, subscriber location information, subscriber service information, and the like.

The Internet 120 connects the PSS 100 to the server of a content provider that provides various contents such as news, information retrieval, and various file downloads through the portable Internet network 110, and then exchanges the aforementioned contents. Means a network that provides a path.

2 is a flowchart illustrating a method of performing initial ranging of a portable Internet system according to a preferred embodiment of the present invention.

The first ACR 104 and the second ACR 108 shown in FIG. 1 are ACRs, and the first RAS 102 and the second RAS 106 are RASs.

As the PSS 100 is powered on, it monitors all frequency bands preset in the PSS 100 so that the highest size, i.e., the highest carrier-to-interference noise ratio (CINR) A pilot channel signal having a noise ratio (hereinafter referred to as "CINR") is detected. The PSS 100 determines the RAS that transmits the pilot channel signal having the strongest pilot CINR as the RAS to which the PSS 100 currently belongs, and receives a preamble of a downlink frame transmitted by the RAS to communicate with the RAS. Acquire system synchronization. System synchronization is obtained between the PSS 100 and the RAS, and the PSS 100 receives a downlink map (DL-MAP) message, an uplink channel descriptor (UCD) message, and an uplink from the RAS. A UL-MAP (UL-MAP) message is received and a downlink sink and uplink transmission parameter are obtained.

Here, the DL-MAP message is a MAC layer message that defines the symbol offset and subchannel offset of the burst time-division multiplexed by the PSS 100 on the downlink, the number of symbols and the number of subchannels which are allocated resources.

UCD is a MAC message that describes the PHY layer characteristics on the uplink.

The UL-MAP message is a collection of information that defines the overall access for the scheduling interval.

After acquiring the downlink sync and uplink transmission parameters, the PSS 100 may recognize ranging codes, modulation schemes and coding scheme information, ranging channels, and ranging slots used for initial ranging. .

The PSS 100 selects a randomizing ranging slot among the ranging slots, randomly selects a ranging code used for initial ranging from an initial ranging domain, and then selects the selected ranging. The ranging code selected through the slot is transmitted to the RAS (S200). Here, the transmit power for transmitting the ranging code has a minimum transmit power level.

When the RAS receives an arbitrary ranging code from the PSS 100 through an arbitrary ranging slot, ranging information such as success information indicating successful reception of the ranging code, OFDMA symbol number and subchannel, ranging code, etc. RNG-RSP: Ranging-Response, hereinafter referred to as 'RNG-RSP' message is transmitted to the PSS 100 (S202).

By performing the procedure from step S200 to step S202 described above, the procedure may be repeatedly performed until the RNG-RSP message is successfully received by the PSS 100.

The PSS 100 receiving the RNG-RSP message adjusts time and frequency offset and adjusts transmission power by using success information included in the RNG-RSP message.

The RAS sends an Upload Map (UL-MAP) message that includes a CDMA allocation information element for the PSS 100. Here, the CDMA allocation information element includes an uplink bandwidth for transmitting a ranging request (RNG-REQ) message.

Upon receiving the UL-MAP message, the PSS 100 transmits an RNG-REQ message including a MAC address to the RAS using an uplink resource included in the CDMA allocation information element, that is, an uplink bandwidth.

In addition, the PSS 100 transmits an RNG-REQ message to the RAS including the adjusted time, frequency offset, power parameter, and the like (S204). Receiving the RNG-REQ from the PSS 100, the RAS receives connection identifiers (CID: Connection ID, hereinafter referred to as 'CID'), that is, basic CID and primary management, corresponding to the MAC address of the PSS 100. An initial ranging process is completed by transmitting an RNG-RSP (Success) message including a Primary Management CID to the PSS 100 (S206).

Subsequently, the RAS informs the ACR that the ranging has been successfully performed through the transmission of the A-RNG-NOTI message (S208), and the Basic CID, the Primary Management CID, and the like, which are uniquely assigned to the PSS 100.

The ACR receiving the A-RNG-NOTI message from the RAS transmits the A-RNG-CONF message as a response signal thereto (S210). In addition, the ACR checks whether a context exists for the corresponding PSS 100, and if no context exists, allocates a PSS_Context_ID to the RAS, and the RAS uses the PSS_Context_ID for the PSS 100 so that the PSS 100 Start an administrative session. Also, ACR registers 'Basic CID', 'Primary Management CID', and 'PSS_Context_ID' to PSS_Context entry. (When using EAP authentication, 'A-RNG-NOTI' plays the role of EAP-Start message. .

3 is a flowchart illustrating a method of performing periodic ranging of a portable Internet system according to a preferred embodiment of the present invention.

Periodic ranging refers to ranging performed periodically by the PSS 100 that adjusts the RAS and time offset and transmit power through initial ranging.

The PSS 100 performs a periodic ranging process by using ranging codes allocated for periodic ranging. In addition, the PSS 100 selects a randomizing ranging slot among the ranging slots, randomly selects a ranging code used for ranging in a periodic ranging domain, and then selects a selected lane. The selected ranging code is transmitted to the RAS through the gong slot (S300). Here, the transmission power for transmitting the periodic ranging code has a transmission power level that is increased than the transmission power for transmitting the aforementioned initial ranging code.

When the RAS receives an arbitrary ranging code from the PSS 100 through an arbitrary ranging slot, ranging information such as success information indicating successful reception of the ranging code, OFDMA symbol number and subchannel, ranging code, etc. RNG-RSP: Ranging-Response (hereinafter, referred to as 'RNG-RSP') message (Continue) is transmitted to the PSS 100 (S302).

If the PSS 100 does not receive the RNG-RSP message from the RAS despite of transmitting the ranging code to the RAS, the PSS 100 randomly selects the ranging slot and the ranging code and then selects the ranging slot through the selected ranging slot. The selected ranging code is transmitted back to the RAS (S304).

When the RAS receives an arbitrary ranging code from the PSS 100 through an arbitrary ranging slot, ranging information such as success information indicating successful reception of the ranging code, OFDMA symbol number and subchannel, ranging code, etc. RNG-RSP: Ranging-Response (hereinafter referred to as 'RNG-RSP') message (Success) is transmitted back to the PSS 100 (S306).

In step S304 and step S306, the PSS 100 transmits a periodic ranging code to the RAS through the selected ranging slot, and the RAS transmits an RNG-RSP message to the PSS 100 as a response thereto. The above-mentioned periodic ranging process is repeated until the RNG-RSP message (Success) indicating that the periodic ranging code has been successfully received at 100 is received.

FIG. 4 is a flowchart illustrating a method of performing ranging of a portable Internet system when re-entering call setup in a handoff and idle mode according to a preferred embodiment of the present invention. .

Since steps S400 to S404 illustrated in FIG. 4 are the same procedures as those of steps S200 to S204 illustrated in FIG. 2, overlapping descriptions will be omitted and subsequent procedures will be described.

The RAS sets handover process optimization and handover related parameters to simplify the re-entry procedure of call setup based on the preset PSS context.

Receiving the RNG-REQ from the PSS 100, the RAS receives connection identifiers (CID: Connection ID, hereinafter referred to as 'CID'), that is, basic CID and primary management, corresponding to the MAC address of the PSS 100. An initial ranging process is completed by transmitting an RNG-RSP (Success) message including a Primary Management CID to the PSS 100 (S406).

After the RAS has successfully completed the ranging process for the PSS 100, if the PSS 100 has been previously assigned a PSS Context ID from the RAS, the RAS includes an ACR including the previous context ID of the PSS 100. Low ranging is notified through the transmission of the A-RNG-NOTI message (S408). At this time, RNG-REQ message transmitted and received between the PSS 100 and RAS, various parameters such as time adjusted from the RNG-RSP message, frequency offset and power parameters (parameters) are transmitted to the ACR through the A-RNG-NOTI message Subsequent call registration re-registration will be used as a guide to the process.

The ACR receiving the A-RNG-NOTI message from the RAS transmits the A-RNG-CONF message as a response signal thereto (S410). In addition, the ACR checks whether the context for the corresponding PSS 100 exists, and transmits the Old Pss_Context_ID if the context exists, and if no context exists, allocates the PSS_Context_ID to the RAS to transmit the PSS 100 management session. To start.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, by defining a ranging procedure for transmitting and receiving a call signal between a personal subscriber station and a radio access station included in the portable Internet system, connection failure, handover failure, There is an effect that can prevent the occurrence of various failures, including service failures.

Claims (8)

Between a personal subscriber station (PSS), a radio access station (RAS), and an access control router (ACR) In the ranging, the method for performing various ranging in a portable internet system having a ranging slot and a ranging code used for the ranging, (a) randomly selecting a ranging slot among the ranging slots in the PSS to generate a selective ranging slot, and converting the ranging code used for initial ranging into an initial ranging domain; Randomly selecting a to generate a selection ranging code, and then transmitting the selection ranging code to the RAS through the selection ranging slot; (b) the RAS transmitting a ranging response (RNG-RSP: Ranging-Response, hereinafter 'RNG-RSP') message to the PSS indicating that reception of the selected ranging code was successful; (c) the PSS receiving the RNG-RSP message, sending a ranging request (RNG-REQ: Ranging-Request, hereinafter 'RNG-REQ') message to the RAS; And (d) the RAS receiving the RNG-REQ message and completing an initial ranging procedure by transmitting an RNG-RSP (Success) message to the PSS as a response message. Ranging method in a portable Internet network comprising a. The method of claim 1, wherein the method is (e) the RAS sending a ranging success message (A-RNG-NOTI) to the ACR indicating that the initial ranging procedure was successfully performed; And (f) the ACR receiving the ranging success message, transmitting a response message (A-RNG-CONF) to the RAS; Ranging method in a mobile Internet network, characterized in that it further comprises. The method of claim 1, wherein step (b) (b1) If the RNG-RSP message is not received from the RAS, the random ranging periodically generates a periodic ranging slot and a periodic ranging code, and then generates the periodic ranging code through the periodic ranging slot. Receiving a transmission; And (b2) further comprising sending a periodic RNG-RSP message to the PSS indicating that reception of the periodic ranging code was successful, And executing the periodic ranging procedure of repeating the step (b1) and the step (b2) until the periodic RNG-RSP message is received in the PSS. The method of claim 1, wherein step (d) (d1) The RAS sets a handsover parameter for the re-registration ranging procedure using the previous PSS_Context_ID of the PSS, and completes the RNG-RSP (RNG-RSP) to complete the re-registration ranging procedure for the RNG-REQ message. Sending a Success) message to the PSS; (d2) sending a ranging success message (A-RNG-NOTI) to the ACR indicating that the previous PSS_Context_ID and the ranging for the PSS have been successfully performed; And (d3) the ACR sends a response message (A-RNG-CONF) to the RAS to the ranging success message; Ranging method in a portable Internet network comprising a. The method of claim 4, wherein The ACR determines whether a context exists for the PSS, and if the previous PSS_Context_ID exists, sends the response message (A-RNG-CONF) including the previous PSS_Context_ID to the RAS, and the previous PSS_Context_ID exists. And if not, allocating a new PSS_Context_ID and transmitting the new PSS_Context_ID to the RAS. The method of claim 4, wherein In the case of transmitting the ranging success message to the ACR in step (d2), the mobile station may transmit a plurality of parameters included in the RNG-RSP (Success) message and transmitted to the PSS together to the ACR. Ranging method on the Internet. The method of claim 1, And performing the procedure from step (a) to step (b) until the RNG-RSP message is successfully received by the PSS. Between a personal subscriber station (PSS), a radio access station (RAS), and an access control router (ACR) In the ranging, a method for performing a variety of ranging in a portable Internet system having a ranging slot and a ranging code used for the ranging, (a) the PSS performing initial ranging with the RAS; (b) after the initial ranging is successful, the PSS performs a re-registration ranging procedure in a handoff or idle mode; And (c) if the PSS transmits a ranging code to the RAS and does not receive an RNG-RSP message as a response message, performing a periodic ranging procedure between the PSS and the RAS. Ranging method in a mobile Internet network, characterized in that performing any one or more of the steps.

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