KR20050039442A - Distributing wcdma terminals according to frequency in idle mode and providing hierarchical paging - Google Patents

Abstract

The present invention relates to a distributed arrangement between frequencies of a WCDMA terminal in an idle mode and a hierarchical paging method and system using the same.

A user terminal for searching a paging channel in an idle mode and receiving a voice or data service in a traffic mode; A wireless base station connected to the user terminal through a Uu interface and performing paging for a specific cell or FA where the idle mode terminal is located when a paging event occurs to an idle mode terminal; A core network transmitting a paging request signal to the wireless base station when the paging event occurs; And a wired network connected to the wireless base station to allocate and manage a unique identification code to the user terminal, and to provide a wired communication service. Provide an ever paging system.

According to the present invention, in the case of paging from the WCDMA system to the idle mode terminal, it is possible to reduce the forward link load and reduce the battery consumption of the user terminal.

Description

Distributing WCDMA Terminals according to Frequency in Idle Mode and Providing Hierarchical Paging}

The present invention relates to a distributed arrangement between frequencies of a WCDMA terminal in an idle mode and a hierarchical paging method and system using the same. More specifically, in the WCDMA system, each terminal in the idle mode selects a specific cell (Fell) or frequency allocation (FA) to be located by using the same built-in algorithm, and the paging event to the terminal in the idle mode When a paging event occurs, the present invention relates to a method and a system for transmitting a paging message by searching for a corresponding cell or FA using the same algorithm embedded in a WCDMA system.

The mobile communication service has been continuously developed starting from the low-quality voice call-oriented first generation mobile communication service provided by the analog cellular Advanced Mobile Phone Service (AMPS), which has been in service since the late 1980s. In the second generation mobile communication service, enhanced voice call and low speed (14.4 Kbps) data service provided by digital cellular Global System for Mobile (GSM), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), etc. are possible. It was. In addition, in the 2.5G mobile communication service, the PCS (Personal Communication Service), which can be used around the world in addition to securing the frequency in the GHz band, has been developed to enable improved voice call and low speed (144 Kbps) data service.

Mobile communication networks for mobile communication services up to the 2.5th generation include various types of communication such as a user terminal, a base station transmitter, a base station controller, a mobile switching center, a home location register (HLR), and a visitor location register (VLR). The equipment is installed.

The third generation mobile communication service is classified into asynchronous WCDMA system proposed by 3GPP (Generation Partnership Project) and synchronous CDMA-2000 system proposed by 3GPP2. In particular, the WCDMA system is a wireless protocol recommended by IMT-2000, and many telecommunication service providers around the world are providing or preparing to provide services.

WCDMA systems have a high call quality and use a spread spectrum method, which is suitable for transmitting a large amount of data. The WCDMA communication method adopts AMR (Adaptable Multi-Rate) for voice coding, and supports high mobility enough to make a call even if the user moves at a speed of about 100 Km per hour. In addition, WCDMA communication is adopted by most countries, and 3GPP, which is composed of many organizations such as Korea, Europe, Japan, the United States, and China, is continuously developing technical specifications for WCDMA.

In a WCDMA system, a user terminal uses a voice service and a packet data service through an interim standard-95B (IS-95B) network and a packet switched network (PSN), which are circuit switched networks (CSNs). Accordingly, the WCDMA system continuously checks and manages location information of a user terminal in order to process a call connection request generated by the user terminal or a call connection request generated by the user terminal.

However, in the current WCDMA system, when a user terminal is in idle mode, which cell receives forward link information through frequency allocation and performs reverse link access. do not know. In this case, the idle mode refers to a standby state in which a user terminal in a state where power is turned on does not perform call processing in a WCDMA system.

Therefore, in the WCDMA system, when paging to a user terminal in idle mode, the user terminal transmits a paging message to all cells or FAs included in the zone of the wireless base station where the user terminal has finally registered a location. As a result, the load of the communication system increases because a paging message transmitted from a higher system such as a base station controller or a mobile switching center must be processed even in a cell or an FA where a user terminal to which a paging message is not located is located. This is happening.

In addition, the WCDMA system reduces power consumption of a user terminal by using a paging indicator channel (PICH) similar to an emergency paging channel (QPCH) used in synchronous CDMA-2000. That is, in the wireless section of the WCDMA system, the user terminal operating in the idle mode is notified whether or not the message in the designated paging slot is changed by using a paging indicator in the paging indicator channel. Accordingly, the user terminal operating in the idle mode checks the contents of the paging indicator by searching for the paging slot of the paging indicator channel to check whether the paging message corresponding to the user terminal is changed. Therefore, the remaining user terminals belonging to the same paging group as the specific user terminal where the actual paging occurs also search for the paging slot, so that power consumption of the user terminal is unnecessary.

In order to solve the above-described problem, the present invention, each terminal in the idle mode in the WCDMA system selects a specific cell or FA to be located by using the same built-in algorithm, the paging event to the terminal in the idle mode It is an object of the present invention to propose a method and system for transmitting a paging message by searching for a corresponding cell or FA by using the same algorithm embedded in a WCDMA system.

According to a first object of the present invention, a system for distributed frequency allocation and hierarchical paging of a WCDMA terminal in an idle mode in a WCDMA system, searching for a paging channel in the idle mode, and voice or data in a traffic mode. A user terminal receiving a service; A wireless base station connected to the user terminal through a Uu interface and performing paging for a specific cell or FA where the idle mode terminal is located when a paging event occurs to an idle mode terminal; A core network transmitting a paging request signal to the wireless base station when the paging event occurs; And a wired network connected to the wireless base station to allocate and manage a unique identification code to the user terminal, and to provide a wired communication service. Provide an ever paging system.

According to a second object of the present invention, a method of selecting a cell or FA in which a user terminal in an idle mode is located in a WCDMA system, comprising: (a) switching an operation mode of the user terminal to an idle mode; (b) driving an embedded cell / FA determination algorithm; (c) measuring a frequency reception quality for one or more received RF signals; And (d) selecting a specific cell or FA to be located by using the measured frequency reception quality of each of the WCDMA terminals in the idle mode.

According to a third object of the present invention, there is provided a wireless base station, which is composed of a user terminal, a wireless network controller, and a node B in idle mode, which processes paging to the user terminal, a wired network providing a wired communication service, and a wireless communication service. A method for performing paging to a user terminal, comprising: a core network, the method comprising: (a) receiving a paging request from the core network and confirming a telephone number of a called user terminal; (b) identifying a target Node B on which the location registration of the called terminal was last performed by using the telephone number; (c) driving a built-in cell / FA determination algorithm to identify a selection cell or a selection FA where the called user terminal is located; (d) performing primary paging with the selection cell or the selection FA; (e) determining whether a paging response signal is received from the called user terminal within a predetermined period of time; And (f) performing a secondary paging if the paging response signal is not received.

According to a fourth object of the present invention, in a WCDMA terminal capable of using a voice call and / or packet data service through a WCDMA system, reception quality of one or more RF signals received through the WCDMA system when switched to idle mode The present invention provides a WCDMA terminal having a function of selecting a cell or an FA to be located by using a reception quality result value measured by driving a cell / FA determination algorithm stored therein.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, 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 simplified block diagram of a WCDMA system 100 for distributed placement and hierarchical paging of a user terminal in accordance with a preferred embodiment of the present invention.

WCDMA system 100 according to a preferred embodiment of the present invention is a user terminal 110, wireless base station 120, service packet wireless service support node 130, gateway packet wireless service support node 140, core network ( 150, mobile switching center / visitor location register 160, public switched telephone network 170, and the like.

The user terminal unit 110 includes one or more user equipments (UEs) 112. The user terminal 112 is a WCDMA dedicated terminal that receives voice call and packet data service in the WCDMA system 100. When the power is supplied, the user terminal 112 alternates between an idle mode and a traffic mode. As described above, the idle mode is a mode in which the user terminal 112 in a power-on state operates in a standby state in which a call connection is not made with the WCDMA system, and the traffic mode is a user terminal 112 in WCDMA mode. This mode connects to the system and transmits and receives voice calls and packet data. The user terminal 112 is connected to the wireless base station 120 via the Uu interface.

On the other hand, the user terminal 112 according to an embodiment of the present invention has a built-in algorithm (hereinafter referred to as "cell / FA determination algorithm") for determining the cell or FA to be located in the idle mode. Cell / FA determination algorithm according to an embodiment of the present invention is the reception quality of the frequencies received by the user terminal 112 in the idle mode, or stored in the Subscriber Identity Module (SIM) of the user terminal 112 According to the reception quality of the frequencies, the user terminal 112 selects a cell or FA to be located.

In this case, the user terminal 112 selects a cell or FA. Specifically, the user terminal 112 receives a first common pilot channel (PCPICH) signal of the cell and performs frame synchronization and frame synchronization. It means to perform Cell Synchronization.

In addition, the user terminal 112 drives the cell / FA decision algorithm at the time of switching to the idle mode, for example, the communication state initialization step for performing communication with the WCDMA system in the future and the end of the traffic mode. Determine the cell or FA to be located.

A cell / FA determination algorithm according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

A radio base station (UTRAN: UMTS Terrestrial Radio Access Network (UTRAN) hereinafter) 120 is comprised of radio network subsystems (RNS: RNS) 121. Each RNS 212 also includes a Radio Network Controller (RNC) 122, a plurality of Node Bs 123, and the like. Each Node B 123 includes one or more cells 124 as a coverage area of a communication service.

The RNC 122 generally performs functions such as wired / wireless channel management, protocol matching processing of a terminal and a wireless base station, soft handoff processing, general packet radio service (GPRS) access, system loading, and fault management. Perform. Here, GPRS is a communication method for enabling a packet switching communication implementation in a GSM communication network. RNC 122 and Node B 123 are connected via a lub interface.

Meanwhile, according to an embodiment of the present invention, the RNC 122 views and receives information of the plurality of user terminals 112 in the idle mode, and embeds the same cell / FA determination algorithm as that embedded in the user terminal 112. do. Accordingly, when a paging event occurs for a specific user terminal, the RNC 122 checks whether the paging event is a paging event to a user terminal in an idle mode (hereinafter, referred to as an “idle mode terminal”). If it is determined that the RNC 122 is a paging event to the idle mode terminal, the RNC 122 identifies an area (node B) where the corresponding idle mode terminal finally performed location registration. Then, the RNC 122 operates the cell / FA determination algorithm included therein to find out the cell or FA where the idle mode terminal is located in the region where the idle mode terminal finally performs the location registration.

Each Node B 123 includes a Radio Transceiver Subsystem (RTS) (not shown) with additional functionality to support WCDMA, which is advanced in the existing Interim Standard (IS) -95B system. The RTS performs a radio access termination function with the user terminal 110 according to the 3GPP radio access standard, and transmits and receives information with the user terminal 110 through a function of transmitting / receiving voice, video and data traffic in a WCDMA manner and a transmitting / receiving antenna. . In general, the internal subsystem of the RTS is composed of a Base Station Interconnection Subsystem (BIS), a Base Band Subsystem (BBS) and a Radio Frequency Subsystem (RF).

The size of the cell 124 controlled by each Node B 123 is not constant, and a unique frequency is allocated to each cell 124 from the WCDMA system and communicates with the user terminal 112 using the allocated frequency. Do this.

A service packet wireless service support node (SGSN) 130 and a gateway packet wireless service support node (GGSN) 140 are connected to a core network (CN) and connected to a user terminal (CN). 112) provides a packet data service.

The MSC / VLR (Mobile Switching Center / Visitor Location Register) 160 is connected to the RNC 122 and the Public Switched Telephone Network (PSTN) 170 to the user terminal 112. It provides a circuit circuit (CS) network service such as voice call.

2 is a block diagram briefly illustrating an internal configuration of a user terminal 112 according to an exemplary embodiment of the present invention.

The user terminal 112 according to the embodiment of the present invention includes a program memory unit 210, a parameter storage unit 211, a subscriber information storage unit 212, a microprocessor 213, and the like.

The program memory unit 210 implements the functions of the user terminal 112 itself, and stores protocol software for modulating and demodulating voice data, packet data, and signals transmitted and received through a wired or wireless Internet network. In addition, the cell / FA determination algorithm described with reference to FIG. 1 is stored in the program memory unit 210. The cell / FA determination algorithm is driven by the control of the microprocessor 220 and used to determine the cell or FA where the user terminal 112 in the idle state will be located.

The parameter storage unit 211 includes asynchronous and fourth generation communication systems defined by 3GPP, the International Telecommunication Union (ITU), the Operator Harmonization Group (OHG), and the like so that the user terminal 112 can perform voice calls and / or data communications. Various parameters that are in use or available for use can be stored or stored. Accordingly, the protocol software stored in the program memory unit 210 modulates and / or demodulates the voice and / or data to be received or transmitted using the parameters stored in the parameter storage unit 211.

The subscriber information storage unit 212 stores a mobile station identification number, an ESN, a personal security key, and various data necessary for the operation of the user terminal. The subscriber information storage unit 216 is inserted into a slot in the user terminal in the form of a card, which is also called a SIM card, and performs an interface function between the user terminal and a wired / wireless communication network. Of course, various IC cards may be used in addition to the SIM card, and the function of the subscriber information storage unit 216 may be implemented in the internal chip of the user terminal instead of a separate card. In the WCDMA terminal applied to the WCDMA system, the function of the subscriber information storage unit 216 is improved to support faster communication, and a high reliability (USIM: UMTS SIM) is used.

The microprocessor 213 controls the overall operation of the user terminal 112. In particular, when the user terminal 112 is set or switched to the idle mode, the microprocessor 213 loads a cell / FA determination algorithm stored in the program memory unit 210 so that the user terminal 112 may be located. Determine the FA.

3 is a flowchart illustrating a process in which the user terminal 112 selects a cell or FA in which the user terminal 112 is located, according to an embodiment of the present invention.

Referring to FIG. 2 together, power is supplied to the user terminal 112 using the WCDMA system to perform terminal initialization or to end a traffic mode in which a voice call service or a packet data service is provided through the WCDMA system. (S300). When the event of step S300 occurs, the microprocessor 220 of the user terminal 112 sets the mode state storage unit 215 to the idle mode to switch the user terminal 112 to the idle mode (S302).

The microprocessor 220 switches the user terminal 112 to the idle mode and then drives the cell / FA determination algorithm stored in the program memory unit 210 (S304). Then, the microprocessor 220 corresponds to a frequency signal received through the RF antenna 270 and the duplexer 281 or the frequency stored in the subscriber information storage unit 216 using the reception quality measuring unit 282. The control is performed to measure the reception quality with respect to the frequency signal. The reception quality measurement unit 282 transmits the measured reception quality result value to the reception quality classification unit 283, and the reception quality classification unit 283 transmits the reception quality result value to the microprocessor 220.

The microprocessor 220 applies the received reception quality result value to a running cell / FA decision algorithm, which checks the total number of frequencies (N _f ) included in the reception quality result value and determines the frequency of the frequency. It assigns a sequence number in ascending order according to the magnitude (F _s) (S308). For example, when the magnitudes of the frequencies included in the reception quality result are 10664 and 10689, N _f is 2, the F _s value of 10664 is 1, and the F _s value of 10689 is 2.

The cell / FA determination algorithm obtains an F _c value according to Equation 1 below (S310).

F _c = (last Digit number in IMSI + 1) mod N _f

In Equation 1, F _c is a cell selection order number, and IMSI (International Mobile Subscriber Identifier) is a phone number of an idle mode terminal.

The cell / FA determination algorithm determines whether there is an F _s having the same value as the F _c value obtained using Equation 1 of step S310 (S312). If the microprocessor 220 determines that there is an F _s having the same value as F _c as a result of the determination in step S312, the cell or FA where the user terminal 112 is to be located is a cell or FA using a frequency to which the corresponding F _s value is assigned. Selected as FA (S314).

4 is a flowchart illustrating a process of paging an idle mode terminal in which a cell or FA to be located is selected according to an embodiment of the present invention.

When a paging event occurs in the idle mode terminal, the RNC 122 receives a paging message transmitted through the core network 150, the GGSN 140, and the SGSN 130 (S400). Receiving a paging message, the RNC 122 checks the telephone number (IMSI) of the called terminal to be paging target (S402). In step S402, the RNC 122 that checks the telephone number of the called terminal checks the Node B 123 where the location registration of the called terminal is finally performed (S404).

The RNC 122 drives a cell / FA determination algorithm stored in a storage device such as a ROM (S406). Here, the cell / FA determination algorithm stored in the RNC 122 is the same as the cell / FA determination algorithm stored in the user terminal 112 in the WCDMA system. In the cell / FA determination algorithm, a plurality of cells controlled by the Node B 123 in which the terminating terminal finally performs location registration allocates a sequence number F _s according to a frequency value used in each cell (S408).

The cell / FA determination algorithm obtains a cell selection sequence number F _c using the same equation as that described in Equation 1 described with reference to FIG. 3 (S410). The cell / FA determination algorithm determines whether F _s having the same value as the F _c value obtained using Equation 1 of step S410 exists (S412). If the microprocessor 220 determines that there is an F _s having the same value as F _c as a result of the determination in step S412, the cell or FA selected by the user terminal 112 for the cell or FA using the frequency to which the corresponding F _s value is assigned. Check (S414).

The RNC 122 performs primary paging to transmit a paging indicator and a paging message to the cell or FA identified in step S414 through the Iub interface (S416). Here, the paging message is transmitted through the paging channel (PCH: Paging Channel), the paging indicator is transmitted through the paging indicator channel. Therefore, in the present invention, since only the cell or FA where the actual idle mode terminal is located uses the paging channel and the paging indicator channel, the system load can be reduced compared to the prior art.

Meanwhile, the RNC 122 performing the primary paging in step S416 determines whether a call response signal is transmitted from the called terminal within a predetermined time (S418). As a result of the determination of step S418, if the RNC 122 does not receive the call response signal from the called terminal within a predetermined time, secondary paging to the remaining cells or FAs that have not performed the primary paging among the Node B jurisdiction where the location registration was finally performed Perform (S420). Here, secondary paging means sending a paging message and a paging indicator similarly to the primary paging performed in step S416.

Meanwhile, the cell / FA determination algorithm described in Equation 1 of FIG. 3 is only an embodiment and the inventive concept is not limited thereto. That is, in the technical concept of the present invention, the WCDMA system and the user terminal use the same cell / FA determination algorithm to determine the cell or FA where the user terminal is located in the idle mode, and the WCDMA system determines the cell in which the idle mode terminal is located. It finds an FA and performs paging of the corresponding cell or FA preferentially.

 The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, in the conventional WCDMA system, the paging of the idle mode terminal increases the system load and increases the battery consumption of the user terminal. However, the idle mode terminal according to the present invention has a specific cell or FA selected by the user. Since only the paging slot included in the paging channel needs to be searched, the battery consumption is reduced.

In addition, when a paging to an idle mode terminal occurs, the WCDMA system checks a specific cell or FA where a called terminal is located by using the same algorithm as that of the user terminal and performs paging only to the corresponding cell or FA. It has the effect of reducing the load.

1 is a block diagram schematically illustrating a WCDMA system for distributed placement and hierarchical paging of a user terminal according to a preferred embodiment of the present invention;

2 is a block diagram briefly illustrating an internal configuration of a user terminal according to an embodiment of the present invention;

3 is a flowchart illustrating a process in which a user terminal selects a cell or FA to be located by the user terminal according to an embodiment of the present invention;

4 is a flowchart illustrating a process of paging an idle mode terminal in which a cell or FA to be located is selected according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: WCDMA system 112: user terminal

120: UTRAN 121: RNS

122: RNC 123: Node B

130: SGSN 140: GGSN

150: core network 160: MSC / VLR

170: PSTN 210: program memory section

211: parameter storage unit 212: subscriber information storage unit

213: Microprocessor

Claims (20)

A system for hierarchical distributed placement and hierarchical paging of a WCDMA terminal in idle mode in a WCDMA system, A user terminal (UE) for searching for a paging channel in the idle mode and receiving a voice or data service in a traffic mode; A wireless base station (UTRAN: UMTS) connected to the user terminal through a Uu interface and performing paging for a specific cell (Fell) or FA (Frequency Allocation) where the idle mode terminal is located when a paging event occurs to an idle mode terminal. Terrestrial Radio Access Network); And A core network (CN) for transmitting a paging request signal to the wireless base station when the paging event occurs. Distributed distribution between frequencies of the WCDMA terminal in the idle mode, characterized in that it comprises a hierarchical paging system using the same. The method of claim 1, The user terminal includes a cell / FA determination algorithm for selecting a cell or a FA to be located in the idle mode, and a hierarchical paging system using the same between the frequencies of the WCDMA terminal in the idle mode . The method of claim 2, The cell / FA determination algorithm selects a cell or FA in which the idle mode terminal is located based on a frequency reception quality measured for one or more RF signals received by the idle mode terminal. Distributed arrangement between frequencies of a terminal and a hierarchical paging system using the same. The method of claim 2, The cell / FA determination algorithm is performed by the idle mode terminal based on a frequency reception quality measured for each RF signal of one or more frequency domains stored in a subscriber information storage unit (USIM: UMTS Subscriber Identity Module) of the idle mode terminal. A distributed frequency-to-frequency arrangement of a WCDMA terminal in idle mode characterized by selecting a cell or a FA to be located, and a hierarchical paging system using the same. The method of claim 1, wherein the wireless base station A radio network controller (RNC) that manages wired and wireless channels and handles communication protocol matching and soft handoff with the user terminal; And One or more Node Bs connected to the wireless network controller through a lub interface to handle transmission and reception of voice and data, and to manage one or more cells. Distributed distribution between frequencies of the WCDMA terminal in the idle mode, characterized in that it comprises a hierarchical paging system using the same. The method according to claim 2 or 5, The wireless network controller stores the same cell / FA determination algorithm as that of the user terminal, wherein the frequency distribution arrangement of the WCDMA terminal in the idle mode and the hierarchical paging system using the same. A method for selecting a cell or a frequency allocation (FA) in which a user terminal in idle mode is located in a WCDMA system, (a) switching the operation mode of the user terminal to an idle mode; (b) driving a cell / FA determination algorithm embedded in the user terminal; (c) measuring a frequency reception quality for one or more received RF signals; And (d) selecting a specific cell or FA to be located by using each of the measured frequency reception qualities. Distributed distribution method between frequencies of the WCDMA terminal in the idle mode comprising a. 8. The method of claim 7, wherein in step (a) The user terminal is switched to the idle mode after the initialization of the power (Initialization) of the power (Initialization) or the traffic mode (Traffic Mode) is terminated between the frequencies of the WCDMA terminal in the idle mode Distributed deployment method. 8. The method of claim 7, wherein in step (c) The user terminal frequency of the WCDMA terminal in the idle mode, characterized in that for measuring the frequency reception quality for each RF signal corresponding to the frequency stored in the subscriber information storage unit (USIM: UMTS Subscriber Identity Module) Distributed deployment method. The method of claim 7, wherein the cell / FA determination algorithm, (a) assigning a sequence number (F _s ) in ascending order for frequencies of one or more RF signals having a reception quality of at least a certain level; (b) determining whether there is a selection sequence having a value equal to F _c = (last Digit number of IMSI + 1) mod N _f ; And (c) selecting a cell or FA using a frequency to which the selection sequence is assigned; Distributed distribution method between frequencies of the WCDMA terminal in the idle mode comprising a. The method of claim 10, The International Mobile Subscriber Identifier (IMSI) is a telephone number of an idle mode terminal, and N _f is a total number of frequencies having a reception quality of a predetermined level or more. A radio base station (UTRAN: UMTS Terrestrial Radio Access Network) configured with a user terminal in idle mode, a radio network controller (RNC), and a node B (Node B) to process paging to the user terminal. In the method for performing paging to the user terminal is configured to include a core network (CN) providing a wireless communication service, (a) the wireless network controller receiving a paging request from the core network and confirming a telephone number of the called user terminal; (b) identifying a target Node B on which the location registration of the called terminal is finally performed using the telephone number; (c) driving an embedded cell / FA determination algorithm to identify a selected cell or a selected frequency allocation (FA) in which the called user terminal is located; (d) performing primary paging with the selection cell or the selection FA; (e) determining whether a paging response signal is received from the called user terminal within a predetermined period of time; And (f) performing secondary paging if the paging response signal is not received Hierarchical paging method to the WCDMA terminal in the idle mode, characterized in that it comprises a. 13. The method of claim 12, wherein the cell / FA determination algorithm is (c1) assigning a sequence number (F _s ) in ascending order to frequencies used in each cell of the target node B; (c2) determining whether a selection sequence having a value equal to F _c = (last Digit number of IMSI + 1) mod N _f exists; And (c3) determining the cell or FA using the frequency to which the selection sequence is assigned as the selection cell or the selection FA; A hierarchical paging method to a WCDMA terminal in idle mode, characterized in that consisting of. The method of claim 13, The IMSI is a hierarchical paging method for a WCDMA terminal in an idle mode, wherein paging is a telephone number of a called user terminal, and N _f is a total number of frequencies used by the target node B. The method of claim 12, And a same algorithm as the cell / FA determination algorithm is stored in the called user terminal. 13. The method according to claim 12, wherein in step (d) And the primary paging transmits a paging indicator and a paging message to the selected cell or the selected FA through an Iub interface. 13. The method according to claim 12, wherein in step (f) The secondary paging is a hierarchical paging method for a WCDMA terminal in idle mode, wherein the target node B is performed on one or more cells or FAs in which the primary paging is not performed. . A WCDMA terminal capable of using voice calls and / or packet data services via a WCDMA system, In case of switching to idle mode, the receiver may measure the reception quality of one or more RF signals received through the WCDMA system, and use the reception quality result value measured by driving the stored cell / FA decision algorithm. WCDMA terminal having a function for selecting a cell or a frequency allocation (FA) to be located. The method of claim 18, The WCDMA terminal selects a cell or FA to be located by using a reception quality result value measured for each RF signal of one or more frequency domains stored in a subscriber information storage unit (USIM: UMTS Subscriber Identity Module). WCDMA terminal. The method of claim 18, Wherein the WCDMA terminal drives the cell / FA decision algorithm when power is started and after communication initialization is performed or when the traffic mode is terminated.