KR100589679B1 - High speed mobile internet system and his ranging method - Google Patents

Abstract

The present invention relates to a high speed portable Internet system and a ranging method thereof. The present invention distributes the ranging function of the high-speed portable Internet system to the subsystem of the AP to perform. In this way, delay in executing the ranging function can be minimized and resource management can be smoothly performed.

High speed portable internet system, ranging, access point, access traffic subsystem, access control subsystem

Description

HIGH-SPEED PORTABLE INTERNET SYSTEM AND RANGING METHOD FOR THE SAME}

1 is a block diagram of a high-speed portable Internet system according to an embodiment of the present invention.

2 is a software structural diagram of an ATS according to an embodiment of the present invention.

3 is a diagram showing the internal function of the RNGB according to an embodiment of the present invention.

4 is a diagram illustrating a procedure of performing a ranging function in an ATS according to an embodiment of the present invention.

5A and 5B illustrate a process of causing an ATS to process an initial ranging function required by an AT according to an embodiment of the present invention.

6 is a diagram illustrating a table for ranging management according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high speed portable internet system (HPi), and to a ranging method required for a terminal to access a system in a high speed portable internet system.

Conventional Orthogonal Frequency Division Multiplexing (OFDM) wireless communication systems mainly propose algorithms for minimizing interference between base stations by differently assigning ranging codes used by each base station. In general, when the ranging codes are used in all base stations, such an algorithm is necessary because interference increases.

Such a ranging code allocation algorithm can reduce interference between base stations by allocating codes used by each base station. However, since the number of codes allocated to each base station itself is reduced, when the multiple subscribers request access at the same time, the efficiency is low. In addition, when the ranging function is performed in a control processor that performs resource management, a problem that takes a long time to perform the ranging function occurs.

On the other hand, in a high-speed portable Internet system, a mobile terminal needs a ranging function to access an access point (AP). This ranging function is an initial ranging function in which a terminal first accesses an AP with a CDMA code assigned thereto. RNG RSP (Ranging Response) function that processes the RNG REQ (Ranging Request) message transmitted by a terminal that has successfully initial ranging and periodically reports its status to the AP. It can be classified as ranging.

That is, when a mobile terminal performs a ranging function using a code division multiple access (CDMA) code to access an AP, the modem receives a ranging code and controls traffic through DSP (Digital Signal Processing). Delivers to ATS (Access Traffic Subsystem). In this case, the CDMA code received by the modem transmits the timing, power, and frequency adjustment offset values of the terminal transmitting the code again through the RNG RSP message, so that the terminal synchronizes with the initial synchronization. Perform on

In addition, when the terminal receiving the RNG RSP message makes a ranging request again through the RNG REQ message, the basic CID and the primary CID of the mobile terminal need to be allocated. Send. In addition, an access controller subsystem (ACS) that controls a call that receives a raging request internal message allocates resources of a corresponding terminal and informs ATS of the allocated information.

However, when a terminal transmits and receives an ATS and an ACS internal message, there may be a problem in that synchronization between currently received ranging information and previously received ranging information is inconsistent.

An object of the present invention is to provide a method of reducing ranging execution time by distributing a ranging function of a high-speed portable Internet system to a subsystem of an AP.

Another object of the present invention is to provide a method for synchronizing a ranging function between AT and ATS.

A high-speed portable Internet system according to a feature of the present invention for achieving the above object is a high-speed portable Internet system for providing a service to a mobile terminal connected through an access point (AP) and a packet access router (PAR),

The AP,

ATS (Access Traffic Subsystem) for controlling traffic processing and radio link transmission and reception, performing initial ranging in response to a request for access from the mobile terminal, and performing ranging for periodically reporting a state received from the mobile terminal. ; And an access controller subsystem (ACS) that performs user and cell management and performs ranging in response to a ranging request message received from the mobile terminal in which the initial ranging is completed.

The ATS,

A ranging control block (RNGB) for controlling a radio link and performing a ranging function; And a Traffic Resource Management Block (TRMB) that manages the blocks and processes the messages received from the ACS.

The RNGB,

The ranging request message information received from the mobile terminal having completed the initial ranging and the information of the mobile terminal are transmitted to the ACS, and the ranging response message received from the ACS through the TRMB is transmitted to the mobile terminal.

The ATS,

Packet Scheduling Block (PSCB) responsible for scheduling of packets; A packet handling block (PHDB) for configuring a MAC PDU (Medium Access Control Protocol Data Unit) to be transmitted in a radio section; A packet classification block (PCFB) that performs a packet classification function and a CID mapping function of a received packet as a main function; And a DSP interface control block (DICB) for managing an interface with a digital signal processing (DSP).

A ranging method of a high-speed portable Internet system according to an aspect of the present invention is an access point (AP), where the AP controls an access traffic subsystem (ATS) for controlling traffic processing and radio link transmission and reception and an ACS for user and cell management. A method of performing ranging in a high-speed portable Internet system that includes a (Access Controller Subsystem) and a service to a mobile terminal connected through a packet access router (PAR),

a) receiving the ranging code from the mobile terminal to which the ATS attempts initial access and allocating a band to perform initial ranging; b) receiving a ranging request message from the mobile terminal which has succeeded in initial ranging and transmitting the ranging request message to the ACS; c) the ACS receiving the ranging request message performs ranging on the mobile terminal and transmits a ranging response message to the ATS; And d) informing the mobile terminal of completion of ranging by the ATS receiving the ranging response message.

Step a) is

i) assigning an ID to the mobile terminal to which the ATS attempts initial access; ii) storing information necessary for the initial ranging and determining state information of the mobile terminal from the information received from the mobile terminal; iii) packing a ranging response message based on the determined state information; And iv) performing a function to process the initial ranging code.

In step iii),

If the status information indicates a failure, the ID for the mobile terminal is released.

Step a) is

After the step iv), if the type of the ID for the mobile terminal is the initial ranging code type may further comprise the step of requesting the band allocation.

C),

The ACS receiving the ranging request message allocates control information for the mobile terminal and transmits a message to the ATS requesting information allocation for the mobile terminal; The ATS receiving the information allocation request message allocates information on the mobile terminal and transmits a response message to the information allocation to the ACS; And receiving, by the ACS receiving the response message for the information allocation, the ranging response message to the ATS.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

First, a configuration of a high speed portable Internet system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a diagram showing the structure of a high-speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 1, a high speed portable Internet system according to an embodiment of the present invention includes an access terminal (AT) 100, an access point 200 that performs a base station function, and a packet connection. A packet access router (PAR) 300 that performs a routing function and an external agent function of mobile IP is included.

The AP 200 performs a CDMA code ranging function for a call connection of the user terminal 100, and includes an access controller subsystem (ACS) 230, an access traffic subsystem 220, and a baseband subsystem (BBS). 210 and Ethernet switch 240.

The ACS 230 manages the resources of each AT and performs the control function of the base station, the BBS 210 performs the transmission and reception function of the radio section, and the ATS 220 controls the traffic processing and the radio link transmission and reception between the base station and the terminal. Perform the function. The Ethernet switch 240 connects the PAR 300 with the ATS 220 and the ACS 230.

Next, the ACS 230 and the ATS 220 according to the embodiment of the present invention will be described in detail.

2 illustrates in detail the software structure of ATS 220 according to an embodiment of the invention.

As shown in FIG. 2, the ATS 220 includes a Packet Scheduling Block (PSCB) 224, a Routing Control Block (RNGB) 225, a Packet Handling Block (PHDB) 222, and a Packet Classification Block (PCFB) ( 221, a DSP interface control block (DICB) 223, and a software block of a traffic resource management block (TRMB) 226.

The PSCB 224 is responsible for scheduling the packet, the RNGB 225 controls the radio link, and the PHDB 222 configures a MAC Medium Access Control Protocol Data Unit (PDU) to be transmitted in the radio section. The PCFB 221 performs a packet classification function and a CID mapping function of a received packet as a main function, and the DICB 223 manages a DSP and an interface. The TRMB 226 manages each block and receives and processes the messages sent from the ACS 230 or distributes the necessary blocks.

Next, the function of the RNGB 225 according to an embodiment of the present invention will be described in detail.

3 illustrates the RNGB 225 according to an embodiment of the present invention by function.

As shown in FIG. 3, the RNGB 225 may be broadly divided into a block initializer, an up-ranging processor, and a down-ranging processor according to functions.

The RNG_REQ performs the initial code access function, the periodic CDMA access processing function requested by the AT, the bandwidth allocation request processing function, and the RNG_REQ function received after the initial ranging connection is terminated by the structure received from the DSP. It consists of processing functions. In addition, the down-ranging processing unit transmits an initial RNG_RSP function and an RNG_REQ request to the ACS 223 performed in response to the initial code access function, and generates an RNG_RSP message based on the received message in response to the AT 100 to the AT 100. It consists of the RNG_RSP function to transmit.

Hereinafter, a process of ranging in a high speed portable Internet system according to an embodiment of the present invention will be described in detail.

4 illustrates a procedure of ranging in a high speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 4, first, the AT 100 requests initial ranging information using the CDMA code to the ATS 220 to establish a connection (S401). The RNGB 225 of the ATS 220 calls a function for UL region allocation for the RNG_REQ to the PSCB 224 with the initial ranging code received from the AT 100 (S402). After the RNG_REQ allocation for the corresponding UE 100 is confirmed from the PSCB 224, the RNGB 225 creates an RNG_RSP and transmits it (S403).

After receiving the RNG_RSP, the AT 100 transmits an RNG_REQ for ranging to the ATS 220 when the status field is "SUCCESS" (S404). Receiving the RNG_REQ message from the AT 100, the RNGB 225 of the ATS 220 stores the information measured by the modem together with the information of the corresponding message, and then the ACS 230 through the message (msgAlapRangingReq) requesting ranging. ID (rngbId) and MAC address are transmitted (S405).

Upon receiving the message msgAlapRangingReq, the ACS 230 allocates control information of the AT 100 and transmits a message msgAlapRangingSetupCmd for allocating AT information in the ATS 220 to the TRMB 226 (S406). The TRMB 226 receiving the message (msgAlapRangingSetupCmd) sets up the necessary AT 100 information in the ATS 220 with the received information and sends a response message (msgAlapRangingSetupCpt) to the ACS 230 (S407).

Upon receiving the message msgAlapRangingSetupCpt, the ACS 230 sends a message msgAlapRangingRsp to the TRMB 226 (S408). The message msgAlapRangingRsp is a response message that the ACS 230 sends to the ATS 220 in response to the ranging request message msgAlapRangingReq that the ATS 220 receives the RNG REQ message to the ACS 230. The TRMB 226 calls a function for transmitting the received message (msgAlapRangingRsp) to the RNGB 225 (S409), and generates an RNG_RSP message to send the AT 100 to the AT 100. Transmit (S410).

5A through 5B illustrate a process in which the ATS 220 processes an initial ranging function requested by the AT 100 in detail.

First, as shown in FIG. 5A, the ATS 220 receiving the initial ranging request from the AT 100 allocates an ID (rngbId) for storing the received measurement value (S501). The ATS 220 determines the state value by storing the necessary information in the RNG_RSP and then determines whether the received measurement value is a value within the range of the reference value (S502), and uses the determined state information to transmit the RNG_RSP message with a TLV (Type Length). Value) to package (S503).

Next, when the status value determined in step S502 is "SUCCESS", a RNG_RSP message is sent to the PCFB 221 (S504 to S505). If the status value is "FAIL", the ID (rngbId) set in step S501 is released. After that (S506), the process of performing the initial ranging code processing is terminated.

In addition, the state value is determined again after step S505 (S507), and if the state value is not "FAIL", the process of performing the initial ranging code processing is terminated.

Meanwhile, when the RNG_RSP message transmitted in step S505 of FIG. 5A is allocated from the PSCB 224 and transmitted to the terminal 100, the PCFB 224 uses ID (rngbId) information used when requesting transmission data as shown in FIG. 5B. Informs the RNGB 225 that the requested RNG_RSP message has been transmitted to the AT 100 (S511).

Subsequently, when this function is called, the RNGB 225 checks the type of the corresponding rngbId to determine whether it is an initial ranging code or not (S512). If the ID rngbId is the initial ranging code, the FNGB 225 requests the PSCB 224 for a bandwidth allocation request message for RNG_REQ (S513).

6 illustrates an example of a component of an ID type (rngbInfo_type) according to an embodiment of the present invention.

The type information of the ID (rngbInfo) may be used to synchronize synchronization between the ranging function of the ATS and the ranging function of the AT. That is, when there is data to be transmitted in the uplink by the AT 100, the AP 200 should allocate a band to the AT 100. In this case, it is not meaningful to receive the band allocation for the RNG REQ in a state in which the terminal 100 does not first receive the RNG RSP for the initial ranging. Therefore, after the RNG RSP message is sent to the RNGB 225 of the AST 220 to the AT 100, the ranging function of the ATS and the ranging function of the AT are transmitted to the PSCB 221 by sending a band allocation request message for the RNG REQ. Match the motivation between.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

As described above, according to the present invention, when the AP processes a ranging function using a CDMA code for requesting connection setup in an AT of a high-speed portable Internet system, the ranging function is different from the initial ranging function in the ATS in charge of traffic processing. In this case, only the RNG_REQ message requiring the connection resource information is transmitted to the ACS to receive the connection resource information, and the resource management function is performed in the ACS as it is. Therefore, the connection connection time can be shortened and synchronization between the ranging function of the ATS and the ranging function of the AT can be synchronized using the type information of the ID (rngbInfo).

Claims (9)

In the high-speed portable Internet system for providing a service to a mobile terminal connected via an access point (AP) and a packet access router (PAR), The AP, ATS (Access Traffic Subsystem) for controlling traffic processing and radio link transmission and reception, performing initial ranging in response to a request for access from the mobile terminal, and performing ranging for periodically reporting a state received from the mobile terminal. ; And An access controller subsystem (ACS) that performs user and cell management and performs ranging in response to a ranging request message received from the mobile terminal in which the initial ranging is completed. High speed mobile internet system comprising a. The method of claim 1, The ATS, A ranging control block (RNGB) for controlling a radio link and performing a ranging function; And Traffic Resource Management Block (TRMB), which manages the blocks and processes messages received from the ACS High speed mobile internet system comprising a. The method of claim 2, The RNGB, Transmitting ranging request message information received from the mobile terminal having completed the initial ranging and information on the mobile terminal to the ACS, and transmitting a ranging response message received from the ACS through the TRMB to the mobile terminal. High speed mobile internet system. The method of claim 1, The ATS, Packet Scheduling Block (PSCB) responsible for scheduling of packets; A packet handling block (PHDB) for configuring a MAC PDU (Medium Access Control Protocol Data Unit) to be transmitted in a radio section; A packet classification block (PCFB) that performs a packet classification function and a CID mapping function of a received packet as a main function; And DSP Interface Control Block (DICB), which manages DSP and interfaces High speed mobile internet system further including. An access point (AP), wherein the AP includes an Access Traffic Subsystem (ATS) that controls traffic processing and radio link transmission and reception, and an Access Controller Subsystem (ACS) that performs user and cell management; In the method for performing ranging in a high-speed portable Internet system providing a service to a mobile terminal connected via a PAR), a) receiving the ranging code from the mobile terminal to which the ATS attempts initial access and allocating a band to perform initial ranging; b) receiving a ranging request message from the mobile terminal which has succeeded in initial ranging and transmitting the ranging request message to the ACS; c) the ACS receiving the ranging request message performs ranging on the mobile terminal and transmits a ranging response message to the ATS; And d) the ATS receiving the ranging response message notifies the mobile terminal of completion of ranging; Ranging method of a high-speed mobile Internet system comprising a. The method of claim 5, Step a) is i) assigning an ID to the mobile terminal to which the ATS attempts initial access; ii) storing information necessary for the initial ranging and determining state information of the mobile terminal from information received from the mobile terminal; iii) packing a ranging response message based on the determined state information; And iv) performing a function to process the initial ranging code Ranging method of a high-speed mobile Internet system comprising a. The method of claim 6, In step iii), If the status information indicates a failure, to release the ID for the mobile terminal Ranging method of high speed mobile Internet system. The method of claim 6, Step a) is After step iv), requesting band allocation if the type of ID for the mobile terminal is an initial ranging code type; Ranging method of a high-speed mobile Internet system further comprising. The method of claim 5, C), Receiving, by the ACS, the ranging request message, allocating control information for the mobile terminal and transmitting a message requesting information allocation for the mobile terminal to the ATS; The ATS receiving the information allocation request message allocates information on the mobile terminal and transmits a response message to the information allocation to the ACS; And An ACS receiving the response message for the information allocation, transmitting a ranging response message to the ATS Ranging method of a high-speed mobile Internet system comprising a.

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