JP2007318598A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such a problem that transmission of a position registration request telegram from a radio terminal device causes an increase in communication traffics of control channel communication (uplink) in a multi-channel access radio communication system. <P>SOLUTION: The radio communication system has: a line controller having a first storage part; a plurality of base stations which are coupled with the line controller and transmit different pieces of broadcast information; and the radio terminal which communicates with the plurality of base stations by a wireless circuit, the radio terminal has a function for receiving the different pieces of broadcast information of the plurality of base stations and a second storage part, when the radio terminal moves the base stations, the radio terminal captures the broadcast information of the base stations, collates the captured broadcast information with broadcast information stored in the second storage part of the radio terminal and when there is no broadcast information matched with the captured broadcast information, the radio terminal stores the captured broadcast information of the base stations into the second storage part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radio communication system, and more particularly to location registration of an MCA (Multi Channel Access) radio communication system.

  One of digital radio systems in practical use is a mobile communication system defined by the standard ARIB STD-T87 (Association of Radio Industries and Businesses-T87) (for example, see Non-Patent Document 1). . This system is an in-airport digital mobile communication system, for example, a system as shown in FIG. FIG. 1 shows a wireless communication system for explaining the present invention. Since the system configuration is almost the same as that of the conventional system, the conventional wireless communication system will be described with reference to FIG. In FIG. 1, 100 is a line control apparatus, 101 is a transmission path, 102-1, 102-2,... 102-M are a plurality of base stations. In addition, when representing a base station, it is referred to as a base station 102. 103-1, 103-2,... 103 -N are a plurality of wireless terminal devices (also referred to as mobile stations). In addition, when representing a wireless terminal device, it is referred to as a wireless terminal device 103. 104-M are communication areas (or communication zones) of the base stations 102-1, 102-2,... 102-M, respectively. Note that the line control apparatus 100 may be configured integrally with the base station 102 or may be installed at a place distant from the place. In this case, the line control apparatus 100 and the base station 102 are generally connected via a transmission line 101 such as a wired or micro line. This system is a system configured to provide a communication connection service between a plurality of wireless terminal devices and a wireless terminal device between base stations or via a base station. The line control apparatus 100 maintains and manages the communication connection and service area between the base station 102 and the plurality of wireless terminal apparatuses 103 in the digital wireless communication system, and makes a call from the wireless terminal apparatus 103. Performs control or control for setting a communication route.

  Thus, FIG. 4 shows 400 MHz band radio carrier frequency allocation permitted for use in an airport digital mobile communication system using the digital radio technology defined by the standard ARIB STD-T87. 4, in the uplink direction, that is, in the direction from the wireless terminal device to the base station, a wireless carrier f of about 415 MHz to 417 MHz and f1, f2,. In the downstream direction, that is, in the direction from the base station to the wireless terminal device, a wireless carrier F of about 460 MHz to 462 MHz, which is about 45 MHz away from 415 MHz in the upstream direction, F1, F2,... ing. Accordingly, in the communication of the digital wireless communication system, the frequencies in the upstream direction f1, f2,..., The downstream directions F1, F2,. Each system can use one or a plurality of radio carriers as control carriers and the rest as communication carriers according to the scale.

  Further, each radio carrier is divided into frames as shown in FIG. 5, and the frame is further divided into four slots, and then a control channel C and a communication channel S are allocated to the slots. Here, one frame is 40 ms, for example. The control channel C is a channel for performing connection control of a wireless line, and the communication channel S is a channel for performing a telephone call and data communication. In FIG. 5, for example, the base station 102-1 uses two waves of the uplink radio carriers f1 and f2, the control channel C is 1 channel (1 slot), and the communication channel S is 7 channels (7 The case where it is configured with a slot) is shown.

  In the MCA wireless communication system, when the wireless terminal device 103, for example, the wireless terminal device 103-1 enters the communication area 104-1 of the base station 102-1, the wireless terminal device 103-1 Information necessary for communication, such as broadcast information from 102-1 such as a base station number (or ID) of the base station 102-1 and a synchronization signal, is captured. The wireless terminal device 103-1 that has captured the notification information from the base station 102-1 notifies the location information of the wireless terminal device 103-1 by transmitting a location registration request signal to the base station 102-1. ing. The wireless terminal device 103 is constantly moving, and there are cases where the communication area 104 is changed, or the wireless terminal device 103 moves out of the service area where radio waves do not reach. In this case, in the conventional method, when the wireless terminal device 103 receives the broadcast information notified through the control channel from the base station, the wireless terminal device 103 transmits a location registration request signal to the base station each time, The registration information was notified.

  This will be described with reference to FIG. FIG. 7 is a diagram showing an operation sequence for explaining a conventional location registration method for a wireless terminal device. In addition, the same code | symbol is attached | subjected to the same thing as FIG. In FIG. 7, a case will be described in which the wireless terminal device 103-1 is located in the communication area 104-1 of the base station (base station A) 102-1, for example. When the wireless terminal device 103-1 turns on its own power, the broadcast information from the base station 102-1 is captured (step 701). When wireless terminal apparatus 103-1 acquires broadcast information of base station 102-1, it transmits a location registration request signal to base station 102-1 (step 702). The base station 102-1 that has received the location registration request signal from the wireless terminal device 103-1 transmits a location registration notification signal to the line control device 100 (step 703). The line control device 100 that has received the location registration notification signal performs location registration of the wireless terminal device 103-1, transmits a location registration response signal to the base station 102-1 (step 704), and the base station 102-1 A location registration response signal is transmitted to the wireless terminal device 103-1 (step 705). As a result, the radio terminal apparatus 103-1 can communicate within the communication area 104-1 of the base station 102-1, and the radio terminal apparatus 103-1 holds the frequency of the base station 102-1. The state is shifted to (step 706).

  Similarly, when the wireless terminal device 103-5 turns on its own power supply, the broadcast information from the base station (base station B) 102-2 is captured (step 707). When the wireless terminal device 103-5 acquires the broadcast information of the base station 102-2, it transmits a location registration request signal to the base station 102-2 (step 708). The base station 102-2 that has received the location registration request signal from the wireless terminal device 103-5 transmits a location registration notification signal to the line control device 100 (step 709). The line control device 100 that has received the location registration notification signal performs location registration of the wireless terminal device 103-5, transmits a location registration response signal to the base station 102-2 (step 710), and the base station 102-2 A location registration response signal is transmitted to the wireless terminal device 103-5 (step 711). As a result, the wireless terminal device 103-5 can communicate within the communication area 104-2 of the base station 102-2, and the wireless terminal device 103-5 holds the frequency of the base station 102-2, that is, waits. The state is shifted (step 712).

  Next, once the wireless terminal device 103-1 moves out of the communication area 104-1 of the base station 102-1, the wireless terminal device 103-1 cannot communicate with the base station 102-1 ( Step 713). When the radio terminal device 103-1 enters the communication area 104-1 of the base station 102-1 again and can acquire the broadcast information from the base station 102-1 (step 714), the radio terminal apparatus 103-1 A location registration request signal is transmitted to 1 (step 715). The base station 102-1 that has received the location registration request signal from the wireless terminal device 103-1 transmits a location registration notification signal to the line control device 100 (step 716). The line control device 100 that has received the location registration notification signal updates the location registration of the wireless terminal device 103-1, transmits a location registration response signal to the base station 102-1 (step 717), and the base station 102-1. Transmits a location registration response signal to the wireless terminal device 103-1 (step 718). As a result, the wireless terminal device 103-1 can again communicate within the communication area 104-1 of the base station 102-1, and the wireless terminal device 103-1 holds the frequency of the base station 102-1, that is, Then, a transition is made to the standby state (step 719).

  As described above, in the conventional wireless communication system, even when the wireless terminal device registers the position with the line control device via the base station, the wireless terminal device moves and moves to a communication area of a different base station, or the communication Even if the mobile station moves out of service area and re-enters the communication area of the base station where the location is registered, the base station and the line control device again process the location registration request and response signal as described above. As a result, the communication traffic of the wireless communication system causes an extra message exchange, line occupation, and the like. In particular, in a large system, there are systems with more than 2000 wireless terminal devices, and this is even more so in situations where many wireless terminal devices move. Therefore, it is desired to realize a wireless communication system that can reduce such communication traffic and reduce the connection waiting time.

JP-A-5-130019 Airport digital mobile communication system (ARIB STD-T87), radio industry

  Even if the wireless terminal device performs location registration with the line control device via the base station, the location registration is required again even if the wireless terminal device moves to the base station that has already registered the location. Therefore, it is desired to realize a wireless communication system that can increase communication traffic, reduce communication traffic, and reduce connection waiting time.

  An object of the present invention is to provide a wireless communication system that reduces communication traffic.

  Another object of the present invention is to provide a wireless communication system that reduces the number of transmissions of location registration requests and reduces communication traffic.

  Still another object of the present invention is to provide a wireless communication system that reduces the frequency of collision with a call connection and reduces the connection waiting time due to signal collision.

  A wireless communication system according to the present invention includes a line control device having a first storage unit, a plurality of base stations that are coupled to the line control device and transmit different broadcast information, and communicate with the plurality of base stations through a wireless line. When the wireless terminal device has a function of receiving different broadcast information of the plurality of base stations and a second storage unit, and the wireless terminal device moves the base station The radio terminal apparatus captures the broadcast information of the base station, checks the captured broadcast information against the broadcast information stored in the second storage unit of the radio terminal apparatus, and captures the broadcast information When there is no broadcast information that matches, the wireless terminal device is configured to store the broadcast information captured by the base station in the second storage unit.

  Also, in the wireless communication system of the present invention, when the captured notification information is compared with the notification information stored in the second storage unit of the wireless terminal device, and there is no notification information that matches the captured notification information The wireless terminal device transmits a location registration request signal to the base station, and the line control device responds to the location registration request signal from the base station with a request for location registration in the first storage unit. In addition to performing location registration of the wireless terminal device and transmitting a location registration response signal, the wireless terminal device stores notification information captured by the base station based on reception of the location registration response signal in the second storage. Configured to be stored in the unit.

  Also, in the wireless communication system of the present invention, when the captured notification information is compared with the notification information stored in the second storage unit of the wireless terminal device, and there is no notification information that matches the captured notification information The wireless terminal device transmits a location registration request signal to the base station, and when there is broadcast information that matches the captured broadcast information, the wireless terminal device does not transmit a location registration request signal to the base station. Configured as follows.

  As described above, according to the present invention, the number of transmissions of the location registration request signal from the wireless terminal device can be reduced, and communication traffic to the base station can be reduced. Further, the communication traffic due to the location registration request signal is reduced, so that the number of collisions with the call connection (connection request signal) can be reduced, and a system with a low connection waiting time due to signal collision can be constructed. In addition, it is possible to reduce unnecessary communication such as a location registration request from a radio base station that has already been registered with respect to the line control device, and it is possible to reduce the processing load of the line control device. There is.

  Embodiments of the present invention will be described below with reference to FIGS. 1 to 3 and FIG. FIG. 1 shows a block diagram of a schematic configuration of an embodiment of the present invention. Since FIG. 1 has been described in the previous example, it will be briefly described here. 100 is a line control device, 101 is a transmission path, 102 is a plurality of base stations, 103 is a plurality of wireless terminal devices (also referred to as mobile stations), and 104 is a communication area (or a base station 102). Communication zone). Note that the line control apparatus 100 may be configured integrally with the base station 102 or may be installed at a place distant from the place. In this case, the line control apparatus 100 and the base station 102 are generally connected via a transmission line 101 such as a wired or micro line. The line control device 100 then maintains and manages the communication connection and service area between the base station 102 and the plurality of wireless terminal devices 103 in the digital wireless communication system, and also makes a call from the wireless terminal device 103. Performs control or control for setting a communication route.

  In the radio communication system shown in FIG. 1, the base station 102-1 and the radio terminal apparatuses 103-1, 103-2,... Use uplink radio carriers f1, f2, and downlink radio carriers F1, F2. The upstream frame configuration is assumed to be composed of a control channel C and communication channels S1,... S7 as shown in FIG. The downstream frame configuration is almost the same as the frame configuration shown in FIG. Similarly, the base station 102-2 and the radio terminal devices 103-5,... 103-N use uplink radio carriers f5 and f6 and downlink radio carriers F5 and F6. It is almost the same as shown in FIG. Note that such a wireless carrier and frame configuration are not limited to these, and are appropriately set according to the scale, usage environment, and the like of the wireless communication system.

  Next, FIG. 2 shows a block diagram of a specific configuration of the line control apparatus 100 and the base station 102 of the embodiment shown in FIG. In FIG. 2, the line control device 100 includes a processing device 201, a storage unit 202, a display unit 203, and an operation unit 204. The base station 102 includes a control unit 105, a receiver 106, and a transmitter 107. 2 shows the case where the line control device 100 and the base station 102 are coupled by the transmission path 101, the line control device 100 and the base station 102 can also be configured integrally. .

  FIG. 3 is a block diagram illustrating a schematic configuration of the wireless terminal device 103. Note that the wireless terminal device 103 illustrated in FIG. 3 is a wireless terminal device that can perform simultaneous transmission and reception using, for example, a paired wave of the uplink wireless carrier f1 and the downlink wireless carrier F1. In FIG. 3, 301 is an antenna for performing transmission and reception with the base station 102, 302 is a high-speed switch for simultaneous transmission and reception, 303 is a receiving unit, 304 is a received signal processing unit, 305 is A speaker, 306 is a control unit, 307 is a storage unit, 308 is a display unit, 309 is an operation unit, 310 is a microphone, 311 is a transmission signal processing unit, and 312 is a transmission unit.

  Next, the operation of the embodiment of the present invention shown in FIG. 1 will be described with reference to FIG. FIG. 6 is a diagram showing an operation sequence of an embodiment of the present invention. In FIG. 6, first, when the operation unit 309 of the wireless terminal device 103-1 is operated, for example, when the power is turned on, the control unit 306 operates to transmit the notification information from the base station 102-1 to the antenna 301 and the changeover switch 302. The reception signal processing unit 304 receives the signal via the reception unit 303 (step 601). Note that the base station 102 always has a base station no. (Or ID), broadcast information such as a synchronization signal and system information is transmitted, so that the wireless terminal device 103 located in the communication area of the base station 102 always captures the broadcast information of the base station in the communication area. can do.

  The control unit 306 of the wireless terminal device 103-1 that has received the broadcast information transmits the location registration request signal to the receiver of the base station 102-1 via the transmission signal processing unit 311, the transmission unit 312, the changeover switch 302, and the antenna 301. It transmits to 106 (step 602). The control device 105 of the base station 102-1 that has received the location registration request signal from the wireless terminal device 103-1 transmits a location registration notification signal to the line control device 100 (step 603). Upon receiving the location registration notification signal, the line control device 100 appropriately processes the location registration notification signal by the processing device 201 and registers the location of the wireless terminal device 103-1 in the storage unit 202. A table in which the location of the wireless terminal device 103-1 is registered in the storage unit 202 is shown in Table 1.

表１において、無線端末装置１０３−１は、電源ＯＮ状態で、無線端末装置１０３−１の登録位置は、基地局Ａ（基地局１０２−１と同じ。）であることを示している。また、無線端末装置１０３−３は、まだ、未登録の状態である。更に、後述する無線端末装置１０３−５は、基地局Ａ（基地局１０２−１と同じ。）および基地局Ｂ（基地局１０２−２と同じ。）に登録されていることを示している。

In Table 1, the wireless terminal device 103-1 is in the power-on state, and the registered position of the wireless terminal device 103-1 is the base station A (same as the base station 102-1). The wireless terminal device 103-3 is still unregistered. Further, it is indicated that the wireless terminal device 103-5 described later is registered in the base station A (same as the base station 102-1) and the base station B (same as the base station 102-2).

  Thus, the processing device 201 of the line control device 100 that performed the location registration of the wireless terminal device 103-1 transmits a location registration response signal to the base station 102-1 (step 604), and the base station 102-1 The location registration response signal is transmitted to the wireless terminal device 103-1 (step 605). In the wireless terminal device 103-1, the position registration response signal transmitted from the transmitter 107 of the base station 102-1 is received by the received signal processing unit 304 via the antenna 301, the changeover switch 302, and the receiving unit 303, and the control unit The information is processed appropriately at 306, and broadcast information of the base station A (base station 102-1) as shown in Table 2 in the storage unit 307, for example, the base station N0.102-1 (or ID) and the base station 102-1 The radio carrier uplink f1, downlink F1, etc. are stored (step 606).

これによって無線端末装置１０３−１は、基地局１０２−１の通信エリア１０４−１内で通話が可能となる。即ち、待ち受け状態に移行する。通話の方法について簡単に説明する。例えば、操作部３０９のテンキーで相手の無線端末装置１０３の番号を入力し、送信ボタンを押す。回線制御装置１００は、空きスロット（開きチャネル）、例えば、図５に示す通信チャネルＳ１を指定し、通話路を形成し、通話状態となるので、マイク３１０から入力される音声信号は、送信信号処理部３１１で送信のための所定の信号処理を施した後、送信部３１２に入力される。送信部３１２に入力された信号は、送信のための所定の変調がなされ、所定の送信周波数ｆ１に変換され、切替スイッチ３０２を介してアンテナ３０１から出力され、基地局１０２の受信用無線機１０６へ送信される。

As a result, the wireless terminal device 103-1 can make a call within the communication area 104-1 of the base station 102-1. That is, it shifts to a standby state. Briefly explain how to make a call. For example, the number of the partner wireless terminal device 103 is input with the numeric keypad of the operation unit 309 and the transmission button is pressed. Since the line control device 100 designates an empty slot (open channel), for example, the communication channel S1 shown in FIG. 5, forms a speech path, and enters a speech state, the speech signal input from the microphone 310 is a transmission signal. The signal is input to the transmission unit 312 after the processing unit 311 performs predetermined signal processing for transmission. The signal input to the transmission unit 312 is subjected to predetermined modulation for transmission, converted to a predetermined transmission frequency f1, output from the antenna 301 via the changeover switch 302, and received by the receiving radio 106 of the base station 102. Sent to.

  On the other hand, a signal from the counterpart wireless terminal apparatus 103 is received by the antenna 301 at the frequency F <b> 1 and input to the receiving unit 303 via the changeover switch 302. The signal input to the reception unit 303 is amplified at a high frequency, converted into a predetermined intermediate frequency, further demodulated, and supplied to the reception signal processing unit 304. The reception signal processing unit 304 outputs an audio signal from the speaker 305 after performing predetermined signal processing. In the case of data, the data is displayed on the display unit 308.

  Now, when the wireless terminal device 103-1 moves out of the communication area 104-1 of the base station 102-1, communication with the base station 102-1 becomes impossible. The search for broadcast information of a plurality of base stations 102 is started (step 607). Then, as a result of the search for broadcast information, if broadcast information from any base station cannot be received, the control unit 306 displays “out of service area” on the display unit 308 (step 608). For the search of the broadcast information of the plurality of base stations 102, for example, a table shown in Table 3 storing radio carriers used in each base station 102 is stored in the storage unit 307 of the radio terminal device 103 in advance. And the control part 306 of the radio | wireless terminal apparatus 103-1 changes the frequency of the frequency synthesizer (not shown) which determines a transmission / reception frequency sequentially according to the table shown in Table 3, and searches the radio | wireless carrier which can be received.

さて、無線端末装置１０３−１が移動し、基地局１０２からの報知情報を捕捉する（ステップ６０９）。次に、捕捉した基地局の報知情報と無線端末装置１０３−１の記憶部３０７に登録されている基地局報知情報とを照合し、同じ基地局の報知情報が存在すれば、無線端末装置１０３−１の位置登録要求信号を送信しない（ステップ６１０）。そして、無線端末装置１０３−１の制御部３０６は、同じ基地局情報、例えば、表２に示される基地局１０２−１の上り無線キャリアｆ１、下り無線キャリアＦ１に周波数シンセサイザの周波数を保持する（ステップ６１１）。これによって無線端末装置１０３−１は、基地局１０２−１の通信エリア１０４−１内で通話が可能となる。即ち、待ち受け状態となる。このようにすると、無線端末装置１０３−１が移動して、各基地局の通信エリアを変更したとしても、前に登録されている基地局の報知情報があれば、再度、位置登録要求信号の送信、回線制御装置の登録処理あるいは位置登録応答信号の送信というような複雑な処理ステップを取る必要がなく、待ち受け状態となる。従って、通信トラフィックを軽減することができる。

Now, the wireless terminal apparatus 103-1 moves and captures broadcast information from the base station 102 (step 609). Next, the base station broadcast information registered in the storage unit 307 of the wireless terminal device 103-1 is collated with the captured base station broadcast information, and if the same base station broadcast information exists, the wireless terminal device 103 is checked. -1 location registration request signal is not transmitted (step 610). And the control part 306 of the radio | wireless terminal apparatus 103-1 hold | maintains the frequency of a frequency synthesizer in the same base station information, for example, the uplink radio carrier f1 of the base station 102-1 shown in Table 2, and the downlink radio carrier F1 ( Step 611). As a result, the wireless terminal device 103-1 can talk within the communication area 104-1 of the base station 102-1. That is, it enters a standby state. In this way, even if the radio terminal apparatus 103-1 moves and changes the communication area of each base station, if there is broadcast information of a previously registered base station, the location registration request signal It is not necessary to take complicated processing steps such as transmission, registration processing of a line control device or transmission of a location registration response signal, and a standby state is entered. Accordingly, communication traffic can be reduced.

  Similarly, when the wireless terminal device 103-5 turns on its own power supply, the broadcast information from the base station (base station B) 102-2 is captured (step 620). When wireless terminal apparatus 103-5 captures the broadcast information of base station 102-2, it transmits a location registration request signal to base station 102-2 (step 621). Receiving the location registration request signal from the wireless terminal device 103-5, the base station 102-2 transmits a location registration notification signal to the line control device 100 (step 622). The line control device 100 that has received the location registration notification signal performs location registration of the wireless terminal device 103-5 as shown in the table of Table 1, and transmits a location registration response signal to the base station 102-2 (step 623). The base station 102-2 transmits a location registration response signal to the wireless terminal device 103-5 (step 624). In the wireless terminal device 103-5, the location registration response signal transmitted from the base station 102-2 is received by the reception signal processing unit 304 via the antenna 301, the changeover switch 302, and the reception unit 303 in the same manner as described above, and the control unit The information is processed appropriately in 306, and information on the base station B (base station 102-2), for example, the base station N0. (Or ID) and the radio carrier uplink f5, downlink F5, etc. of the base station 102-2 are stored (step 625). As a result, the wireless terminal device 103-5 can communicate within the communication area 104-2 of the base station 102-2. That is, it shifts to a standby state.

次に、無線端末装置１０３−５が基地局１０２−２の通信エリア１０４−２の圏外に移動すると、基地局１０２−２との通信が出来なくなるので、無線端末装置１０３−２の制御部３０６は、複数の基地局１０２の報知情報のサーチを開始する（ステップ６２６）。そして、報知情報のサーチの結果、どの基地局からの報知情報も受信できない場合には、制御部３０６は、表示部３０８に“圏外”を表示する（ステップ６２７）。

Next, when the wireless terminal device 103-5 moves out of the communication area 104-2 of the base station 102-2, communication with the base station 102-2 becomes impossible, so the control unit 306 of the wireless terminal device 103-2. Starts searching for broadcast information of a plurality of base stations 102 (step 626). Then, as a result of the search for broadcast information, when broadcast information from any base station cannot be received, the control unit 306 displays “out of service area” on the display unit 308 (step 627).

  Now, the wireless terminal device 103-1 moves and captures broadcast information from the base station 102 (step 628). The captured base station broadcast information and the base station broadcast information registered in the storage unit 307 of the wireless terminal device 103-1 are collated. If the collation results in a mismatch (step 629), the wireless terminal device 103 is collated. The control unit 306 of −5 transmits a location registration request signal to the receiver 106 of the base station 102-1 via the transmission signal processing unit 311, the transmission unit 312, the changeover switch 302, and the antenna 301. (Step 630). The control device 105 of the base station 102-1 that has received the location registration request signal from the wireless terminal device 103-5 transmits a location registration notification signal to the line control device 100 (step 631). The line control device 100 that has received the location registration notification signal appropriately processes the location registration notification signal by the processing device 201 and registers the location of the wireless terminal device 103-5 in the storage unit 202. This is as shown in Table 1.

  The processing device 201 of the line control device 100 that has performed location registration of the wireless terminal device 103-5 transmits a location registration response signal to the base station 102-1 (step 632), and the base station 102-1 receives the location registration response signal. The signal is transmitted to the wireless terminal device 103-5 (step 633). In the wireless terminal device 103-5, the position registration response signal transmitted from the transmitter 107 of the base station 102-1 is received by the reception signal processing unit 304 via the antenna 301, the changeover switch 302, and the reception unit 303, and the control unit The information is processed appropriately at 306, and information on the base station A (base station 102-1), for example, the base station N 0. (Or ID) and the radio carrier uplink f1, downlink F1, etc. of the base station 102-1 are stored (step 634).

なお、ステップ６２９で、捕捉した基地局報知情報と無線端末装置１０３−５の記憶部３０７に登録されている基地局報知情報を照合し、照合の結果、不一致であれば、捕捉した基地局の基地局報知情報を記憶部３０７に直に記憶することも可能であるが、無線回線のフェージングあるいはマルチパスの影響等で、無線端末装置１０３−５の位置登録要求信号が回線制御装置１００に送信されない場合が発生する。このような場合、基地局１０２−１からの位置登録応答信号の受信前に捕捉した基地局の基地局報知情報を記憶部３０７に記憶すると、回線制御装置１００に無線端末装置１０３−５の現在位置が登録されていないので、通話ができなくなる恐れがある。従って、無線端末装置１０３−５は、基地局１０２−１からの位置登録応答信号の受信を確認してから記憶部３０７に記憶することが望ましい。

In step 629, the captured base station broadcast information is compared with the base station broadcast information registered in the storage unit 307 of the wireless terminal device 103-5. Although the base station broadcast information can be stored directly in the storage unit 307, the location registration request signal of the wireless terminal device 103-5 is transmitted to the line control device 100 due to the influence of fading or multipath of the wireless line. It may not happen. In such a case, when the base station broadcast information of the base station captured before receiving the location registration response signal from the base station 102-1 is stored in the storage unit 307, the current state of the wireless terminal device 103-5 is stored in the line control device 100. Since the location is not registered, there is a possibility that the call cannot be made. Therefore, it is desirable that the wireless terminal device 103-5 stores the location registration response signal from the base station 102-1 in the storage unit 307 after confirming reception.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the radio communication system described herein, and can be widely applied to radio communication systems other than those described above. Needless to say.

The block diagram of schematic structure of one Example of this invention is shown. It is a block diagram which shows the concrete structure of the channel | line control apparatus and base station which are used by one Example of this invention. It is a block diagram which shows the specific structure of the radio | wireless terminal apparatus used by one Example of this invention. It is a figure which shows the frequency allocation of the radio carrier used by one Example of this invention. It is a figure which shows the frame structure used in one Example of this invention. It is a figure which shows the operation | movement sequence for demonstrating operation | movement of one Example of this invention. It is a figure which shows the operation | movement sequence for demonstrating operation | movement of the conventional radio | wireless communications system.

Explanation of symbols

  100: Line control device, 101: Transmission path, 102: Base station, 103: Wireless terminal device, 104: Communication area, 105: Control unit, 106: Receiver, 107: Transmitter, 201: Processing device, 202, 307 : Storage unit, 203, 308: display unit, 204, 309: operation unit, 301: antenna, 302: changeover switch, 303: reception unit, 304: received signal processing unit, 305: speaker, 306: control unit, 310: Microphone, 311: transmission signal processing unit, 312: transmission unit.

Claims (3)

  A line control device having a first storage unit, a plurality of base stations coupled to the line control device and transmitting different broadcast information, and a radio terminal device communicating with the plurality of base stations via a radio channel The wireless terminal device has a function of receiving different broadcast information of the plurality of base stations and a second storage unit, and when the wireless terminal device moves the base station, the wireless terminal device When the broadcast information of the base station is captured and the captured broadcast information is checked against the broadcast information stored in the second storage unit of the wireless terminal device, and there is no broadcast information that matches the captured broadcast information The wireless terminal apparatus stores the broadcast information captured by the base station in the second storage unit.   The radio communication system according to claim 1, wherein there is no broadcast information that matches the captured broadcast information with the broadcast information stored in the second storage unit of the wireless terminal device and matches the captured broadcast information. The wireless terminal device transmits a location registration request signal to the base station, and the line control device responds to the location registration request signal from the base station with a request for location registration in the first storage unit. In addition to performing location registration of the wireless terminal device and transmitting a location registration response signal, the wireless terminal device stores notification information captured by the base station based on reception of the location registration response signal in the second storage. A wireless communication system characterized in that it is stored in a unit.   The radio communication system according to claim 1, wherein there is no broadcast information that matches the captured broadcast information with the broadcast information stored in the second storage unit of the wireless terminal device and matches the captured broadcast information. The wireless terminal device transmits a location registration request signal to the base station, and when there is broadcast information that matches the captured broadcast information, the wireless terminal device does not transmit a location registration request signal to the base station. A wireless communication system.

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