KR20090016324A - Method and apparatus for operating frequency in a communication system - Google Patents

Abstract

A frequency operation method and an apparatus thereof in a communications system fixing the existing transmission frequency and receiving frequency space difference and performing efficient frequency operation to each country are provided to compose network in frequency band corresponding to system environment and to improve the efficiency according to network operation. A mobile terminal receives a system information message broadcasted in target network in a camping state(201). The mobile terminal searches one or more PLMN(Public Land Mobile Network) existing in the neighboring of the mobile terminal oneself based on a system information message received from network(203). The mobile terminal is an MIB(Master Information Block) within the system information message, MCC(Mobile Country Code) information and MNC(Mobile Network Code) information of the PLMNs(205). Connectable PLMN is obtained in network(207). The mobile terminal performs a position registration procedure with network based on the uplink channel information(211).

Description

METHOD AND APPARATUS FOR OPERATING FREQUENCY IN A COMMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, and more particularly, to an efficient frequency operating method in a universal mobile telecommunication services (UMTS) system.

In general, three types of mobile communication systems are used worldwide. First, there is a Europe-based Global System for Mobile communication (GSM) system, a second generation (2G) system, and second, a synchronous CDMA2000 (Code Division Multiple Access 2000) system, a third generation (3G) system, Korea and the United States. As a result, three methods of UMTS (Universal Mobile Telecommunication Services) systems, which are mainly European, are used.

In particular, the UMTS system, which is the third generation system, is leading the standardization in the 3GPP (3 Generation Partnership Project), and the system can efficiently provide high-speed data / multimedia services up to 2Mbps compared to the existing second generation system, It is expected to be widely used, providing an international roaming feature that can be used anywhere. The UMTS system does not use a Global Positioning System (GPS) for synchronization as compared to other 3G system CDMA2000 systems, and thus is called an asynchronous system.

The frequency band of the current UMTS system is defined in the communication standard as shown in Table 1 below.

As shown in Table 1, Table 1 shows an example of frequency allocation in a UMTS system. Referring to Table 1, the representative countries of Band 1 are Korea and Europe, and the representative countries of Band 2 are North America. In addition, the difference between the transmission frequency (TX frequency) and the reception frequency (RX frequency) between each band is defined as shown in Table 2 below.

Referring to Table 2, Table 2 shows an example of TX / RX frequency difference values for each frequency band in a UMTS system. As shown in Table 2, the difference between the transmission frequency and the reception frequency in each frequency band is fixed.

As described above, when the transmission and reception frequency difference between each frequency band is fixed and used, there is a difficulty in efficient frequency operation due to a different frequency policy for each country. That is, not all countries use frequencies as shown in Tables 1 and 2, but each country may already use the frequency band for other purposes. Therefore, when the frequency band is fixed as shown in Table 1 and Table 2, an additional band is required according to the situation of each country. This, after all, the standardization agency has to set up an additional band, there is a problem that the efficiency of the operation of the frequency, which is an intangible non-reproducible resource becomes inefficient.

Accordingly, the embodiment of the present invention has been devised to solve the problems of the prior art.

An object of the present invention is to provide a method for efficient frequency operation in a mobile communication system.

It is still another object of the present invention to provide an efficient frequency operation method capable of adaptively operating the allocated frequency bands for each country that can be used in the UMTS system according to the usage environment in each country.

A method according to an embodiment of the present invention for achieving the above object, the process of broadcasting a system information message including the frequency information supported by the network, the mobile terminal is based on the frequency information of the system information message The process of connecting to the network is included.

The method according to an embodiment of the present invention for achieving the above object, the process of receiving a system information message that broadcasts in the network, and at least one PLMN (Public Land Mobile) existing in the vicinity based on the system information message Network), obtaining a connectable PLMN among the at least one PLMN to be searched in the master information block in the system information message, and uplinking the accessible PLMN in a system information block in the system information message. Obtaining channel information; and performing location registration based on the uplink channel information.

A mobile terminal according to an embodiment of the present invention for achieving the above object, the communication module for distinguishing and processing each frequency transmitted from the network, and performing communication in a predetermined frequency band, the network broadcast system And a control unit for acquiring an uplink channel based on an information message and controlling communication by the uplink channel.

As described above, according to the frequency operating method and apparatus in the communication system proposed by the present invention, operators in each country may configure a network with a frequency band corresponding to the system environment, which may increase efficiency according to network operation. have. In addition, it is possible to operate the frequency efficiently by country by operating variably without fixing the difference between the existing transmission frequency and the receiving frequency separation. In addition, by defining the frequency band that can be used in the UMTS system for each country, and operating within each frequency band can be operated in each country, it is possible to efficiently operate the frequency band in each country.

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

The terms or words used in the specification and claims described below should not be construed as being limited to ordinary or dictionary meanings, but should be construed as meanings and concepts corresponding to the technical spirit of the present invention. And the embodiments described in the specification and the configuration shown in the drawings are only one of the most preferred embodiment of the present invention, not representing all of the technical idea of the present invention. Therefore, it should be understood that there may be various equivalents and modifications that can substitute for them at the time of the present application.

The present invention proposes an efficient frequency operation method in a UMTS (Universal Mobile Telecommunication Services) system. In particular, according to an embodiment of the present invention, by defining the frequency band that can be used in the UMTS system for each country, and operating within each frequency band to operate in each country, efficient frequency bands for each country Can be operated as

That is, in the embodiment of the present invention, as described with reference to Table 1 above, only frequency bands that can be used in the UMTS system are defined, and operation within each frequency band is adaptively adapted to each country's situation. To operate.

To this end, an embodiment of the present invention broadcasts uplink channel information in a system information message. Through this, the mobile terminal can recognize channel information (frequency information) of the system to which it belongs. In particular, an embodiment of the present invention may include uplink channel information in a system information block (SIB) of the system information message. That is, a specific field (Information Element / Group name) is added to the system information block as shown in Table 3 below, and corresponding frequency information indicating how far an uplink channel is from a downlink channel in the specific field. Broadcast by adding.

As shown in Table 3, the system information block according to the embodiment of the present invention may add a UTRA Absolute Radio Frequency Channel Number (UARFCN) uplink field to notify the frequency information operated in the corresponding network.

The mobile station can search for a receive (RX) frequency in a specific frequency band, and then read the mobile country code (MCC) information and the mobile network code (MNC) information of the master information block (MIB) and use the mobile terminal itself. Make sure you are a Public Land Mobile Network (PLMN). The MCC information and the MNC information indicate a criterion for distinguishing each network PLMN. At this time, if the PLMN is a PLMN that can be used together with a Home Public Land Mobile Network (HPLMN), the location registration procedure can be started in the corresponding frequency band by referring to the information of the UARFCN uplink frequency of the system information block. The HPLMN represents a PLMN to which the mobile terminal is subscribed.

1 is a diagram illustrating a system configuration for describing an operation according to an exemplary embodiment of the present invention.

Before describing FIG. 1, roaming of a mobile terminal overcomes the limitation that a mobile terminal cannot receive services outside an existing area, and covers a single volume in a wide area other than the area to which the mobile terminal is subscribed. Like a function that allows you to receive services. That is, it indicates a function that enables roaming and paging roaming.

Referring to FIG. 1, the movement between PLMNs is called roaming. Here, in FIG. 1, the home network to which the user of the mobile terminal 300 subscribes is called the HPLMN 200, and the visited network other than the HPLMN is referred to as a VPLMN 100. As described above, the case where the mobile terminal 300 moves from the VPLMN 100 (or HPLMN) region to the HPLMN 200 (or VPLMN) region is called roaming.

2 is a diagram illustrating an operation process of a mobile terminal using a system information message according to an embodiment of the present invention. Hereinafter, the operation of the present invention will be described with reference to FIGS. 1 and 2.

1 and 2, first, the mobile terminal 300 receives a system information message broadcast in a corresponding network in a camping state based on the received signal (step 201). The network periodically broadcasts system information messages. Then, the mobile terminal 300 receives and reads the system information message broadcast by the network, and maintains a connection with the network based on the system information message. The system information message is largely divided into a scheduling block that aggregates various system information, one master information block (MIB) and a plurality of various system information blocks (SIB) for network information. Block). The system information message is periodically sent to the mobile terminal 300, and each system information block can be divided into a plurality of partition blocks.

Next, the mobile terminal searches for at least one PLMN present in the vicinity of the mobile terminal 300 based on the system information message received from the network (step 203). Thereafter, the mobile terminal 300 extracts MCC information and MNC information of the PLMNs searched from the master information block MIB in the system information message (step 205) to obtain a PLMN that can be accessed in the network (step 207). ). In this case, the PLMN acquisition may be a selection by the user, or may be an automatic selection in consideration of the reception strength according to a setting method. In addition, the PLMN selection may be selected by searching for the same PLMN as the HPLMN of the mobile terminal 300 as described below.

That is, the mobile terminal 300 analyzes the PLMN obtained through the master information block to determine whether the mobile terminal 300 can use the PLMN. That is, the PLMN information (MCC information and MNC information) is compared with the HPLMN information (MCC information and MNC information) to search for the presence of the PLMN corresponding to the HPLMN information. When there is no PLMN corresponding to the HPLMN, the mobile terminal 300 may perform a general cell reselection procedure. Since the cell reselection operation is outside the scope of the present invention, a detailed operation description thereof will be omitted.

In this case, if a PLMN corresponding to the HPLMN exists in the acquired PLMN, the mobile terminal 300 obtains uplink channel information (transmission frequency information) with reference to a system information block of the system information message (step 209). ). That is, uplink channel information is obtained based on a predefined specific frequency band (downlink frequency band) supported by the network and channel information obtained through the system information block. Thereafter, the mobile terminal 300 performs a location registration procedure with the network based on the acquired uplink channel information (step 211). That is, the mobile terminal 300 performs communication corresponding to the frequency information by checking how far the uplink channel is from the downlink channel with reference to a specific field as shown in Table 3 in the system information block. Can be.

3 is a diagram schematically illustrating a configuration of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 3, in particular, in the example of FIG. 3, the mobile terminal 300 of the present invention is illustrated on the assumption that the mobile terminal 300 supports a single network, but the mobile terminal 300 of the present invention. This is not necessarily limited to this. Therefore, the mobile terminal 300 of the present invention may include a multi-mode mobile terminal simultaneously supporting different networks, such as a 2G network and a 3G network.

Referring to FIG. 3, the mobile terminal 300 according to an embodiment of the present invention controls the overall operation and function of the antenna 310, the communication module 320 for communication with the network, and the mobile terminal 300. The input unit 330 for the display, the display unit 340 for displaying the operation state of the mobile terminal 300, etc., the memory unit 350 for storing various data of the mobile terminal 300 and the overall operation of the mobile terminal 300 It may include a control unit 360 to control the.

The antenna 310 processes a frequency band for a communication service with a network. In FIG. 3, the antenna 310 is illustrated as one configuration. However, when the mobile terminal 300 of the present invention supports multiple modes, the antenna 310 may be configured to have dual antennas or more corresponding to each network.

The communication module 320 may include a duplexer for classifying and processing respective frequencies transmitted from a network, a wireless transceiver for separating transmission and reception radio waves into a predetermined frequency band, and a modem unit for processing a wireless section protocol with the network. have. In this case, the communication module 320 may be configured with at least two communication modules corresponding to each network when the mobile terminal 300 of the present invention supports multiple modes.

The input unit 330 receives various text information, and transmits a key signal input in connection with setting various functions and function control of the mobile terminal 300 to the controller 360. The input unit 330 may be formed of any one or a combination of a touch pad, a keypad of a general key arrangement, and a QWERTY keypad according to the provision form of the mobile terminal 300. In addition, when the display unit 250 includes an input unit, the input unit 330 may be omitted.

The display unit 340 displays screen data generated during application execution, and displays a user's key operation status and function setting information. The display unit 340 may be formed of a liquid crystal display (hereinafter, referred to as an LCD). The LCD may be formed as a touch screen. In this case, the display unit 340 may be included in the input means.

The memory unit 350 stores applications necessary for operating a function according to an embodiment of the present invention, data generated by a user, data received from the outside, and the like. In particular, in an embodiment of the present invention, the data received from the outside may be a system information message broadcasted by a corresponding network to which the mobile terminal 300 is currently connected. The application may include at least one software module for acquiring PLMN information from the system information message, comparing PLMN and HPLMN information, checking a frequency band, searching a received frequency, registering a location, and the like. The memory unit 350 may include one or more buffers for temporarily storing data generated during the execution of the application.

The controller 360 controls the overall operation of the mobile terminal 300 and the signal flow between the internal blocks of the mobile terminal 300. The controller 360 controls the flow of signals between components, such as the communication module 320, the input unit 330, the display unit 340, and the memory unit 350. The controller 360 may include a modem and a codec.

The controller 360 receives a system information message broadcast by a network through the antenna 310 and the communication module 320 and controls the communication function of the mobile terminal 300 by referring to the information in the system information message. . The controller 360 searches for at least one PLMN present in the vicinity of the mobile terminal 300 in the system information message, and extracts information on the searched at least one PLMN. Subsequently, the controller 360 searches for the PLMN matching the HPLMN information in the extracted PLMN information. In detail, the controller 360 obtains MCC information and MNC information from a master information block in the system information message, and searches for the presence of a PLMN matching the MCC information and MNC information of the HPLMN.

When the controller 360 searches for the PLMN corresponding to the HPLMN, the controller 360 obtains uplink channel information by referring to a system information block of the system information message. That is, the control unit 360 checks the frequency difference between the uplink channel and the downlink channel with reference to a specific field as described with reference to Table 3 in the system information block to obtain frequency information of the uplink channel. Acquire. Thereafter, the controller 360 performs location registration with the corresponding PLMN based on the frequency information.

In terms of convenience of the control operation and load reduction of the controller 360, each block capable of processing the control functions of the controller 360 may be configured in the controller 360 or separately. Examples of such blocks may include an acquisition unit for obtaining PLMN information, a comparison unit for comparing PLMN and HPLMN information, a location registration processing unit for performing a check unit location registration for checking a frequency band, and the like.

In addition, the controller 360 may control the switching of the communication module for supporting the mode corresponding to the network to be obtained when the mobile terminal of the present invention supports multiple modes. For example, when simultaneously supporting a 2G network and a 3G network, access to the corresponding network may be controlled by controlling any one communication mode based on a preset priority mode.

On the other hand, as described above, the mobile terminal according to an embodiment of the present invention will be described to represent a case that supports a single mode, the mobile terminal of the present invention is not necessarily limited to a single mode mobile terminal, as described above Of course, the multiple access mode can be supported.

In addition, FIG. 3 illustrates a schematic configuration example of a mobile terminal according to an embodiment of the present invention for convenience of description. However, the present invention is not limited to this configuration. Accordingly, the mobile terminal of the present invention may include components not mentioned above, such as a camera module, an electronic payment module, a short range communication module, an audio processing module, a digital broadcast receiving module, a battery module, and the like, according to a form of provision thereof. In addition, according to the provision form of the mobile terminal, specific blocks may be omitted or replaced by other blocks in the above configuration. This will be readily understood by those of ordinary skill in the art.

In addition, in the above-described embodiment of the present invention, a specific network is described as an example of a network supported by the mobile terminal, but the mobile terminal of the present invention is not limited to the mobile terminal supporting only the specific network. Therefore, the mobile terminal of the present invention can support a service with at least one of a network that is currently commercialized and provides a service, and networks to be developed and deployed in the future. That is, the embodiment of the present invention is described with respect to a UMTS network, but the present invention is not necessarily limited thereto, and is applicable to all networks developed before or in the future.

As described above, according to the present invention, it is possible to efficiently operate frequency by variably operating rather than fixing the difference between the existing transmission frequency and the receiving frequency separation.

As described above, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

1 is a view showing a system configuration for explaining the operation according to an embodiment of the present invention;

2 is a view showing an operation process of a mobile terminal using a system information message according to an embodiment of the present invention;

3 is a view schematically showing the configuration of a mobile terminal according to an embodiment of the present invention.

Claims (16)

Broadcasting a system information message including frequency information supported by the network; And a mobile station is connected to the network based on the frequency information of the system information message. The method of claim 1, And the frequency information is included in a specific field of a system information block of the system information message. The method of claim 2, And wherein the frequency information represents a difference in separation of an uplink channel from a fixed downlink channel. The method of claim 3, And a separation difference between the downlink channel and the uplink channel is variably operated. Receiving a system information message broadcast in a network; Searching for at least one Public Land Mobile Network (PLMN) in the periphery based on the system information message; Acquiring an accessible PLMN among the at least one PLMN to be searched in the master information block in the system information message; Acquiring uplink channel information of the accessible PLMN from a system information block in the system information message; And performing location registration based on the uplink channel information. The method of claim 5, The uplink channel information is obtained based on predefined downlink channel information supported by a network and field information in the system information block. The method of claim 6, And determining a separation difference between an uplink channel and a downlink channel with reference to a field defined in the system information block. The method of claim 7, wherein And a separation difference between the downlink channel and the uplink channel is variably operated. The method of claim 5, The process of obtaining the PLMN, Analyzing information of the PLMN obtained through the master information block; And comparing the PLMN information with HPLMN information of the mobile terminal and selecting a matching PLMN. The method of claim 9, The information of the PLMN includes a mobile country code (MCC) information and mobile netwrok code (MCN) information. Communication module for classifying and processing each frequency transmitted from the network, and performing communication in a predetermined frequency band, And a control unit for acquiring an uplink channel based on a system information message broadcast by the network, and controlling a communication by the uplink channel. The method of claim 11, wherein the control unit And extracting information on at least one PLMN (Public Land Mobile Network) existing in the system information message and searching for a PLMN matching the home PLMN (HPLMN) information. The method of claim 12, wherein the control unit A mobile terminal characterized by acquiring MCC (Mobile Country Code) information and MNC (Mobile Network Code) information from the master information block in the system information message and searching for the presence of a PLMN matching the MCC information and MNC information of the HPLMN. . The method of claim 13, wherein the control unit And uplink channel information by referring to a specific field defined in a system information block of the system information message. The method of claim 14, The specific field is a mobile station characterized in that the field indicating the difference between the predefined downlink channel and the uplink channel supported by the network. The method of claim 15, The difference between the downlink channel and the uplink channel is a mobile terminal, characterized in that the variable operation.

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