JP2011155465A - Radio communication system, radio base station, and radio terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that standby is hardly changed over when a terminal is moved from the service area of a public base station to a femtocell because of a difference in service channel (frequency). <P>SOLUTION: A system selection request of a user is detected by using short-distance radio communication. The change-over opportunity of a standby channel is transmitted to a cellular phone terminal by using the short message of a cellular phone system. Thereby, a standby station is selected. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a wireless communication system, a wireless base station, and a wireless terminal device, such as a mobile phone that can be provided in an area where a wireless mobile terminal overlaps with a public mobile phone service composed of a macro cell or the like and a small cell. The present invention relates to a radio communication system, a radio base station, and a radio terminal apparatus that receive a mobile telephone service.

  The mobile phone service is wireless communication using radio waves. Since radio waves are absorbed and reflected by building materials, etc., the power of receivable radio waves is weakened in specific spaces such as indoors. For this reason, in the downlink (Forward Link) in which communication is performed from the base station apparatus to the wireless terminal, there is a problem that sufficient throughput cannot be obtained due to deterioration of the line quality. In addition, in the uplink (Reverse Link), which is communication from the wireless terminal to the base station apparatus, the wireless terminal has to increase the transmission power for communication, and there is a problem that the power consumption of the wireless terminal increases. .

  Since these phenomena are remarkably observed indoors where the frequency of use of wireless terminals is high, a femtocell configured by a small base station device (femtocell base station device) installed indoors is attracting attention. The wireless terminal device that has received the signal from the femtocell base station device can improve the radio wave condition and solve problems such as a decrease in throughput by accessing the femtocell base station device.

  In CDMA mobile communications, services are implemented using a plurality of carrier frequencies. A channel supported by one carrier frequency is called a service channel. The femtocell base station described above does not need to support a large number of service channels because the coverage area is small, the number of connected users is small, and it is necessary to make it inexpensively. Therefore, a difference occurs in the number and frequency of service channels of the public system and service channels of the femtocell.

  Normally, a mobile phone terminal is usually waiting on a service channel of a public system. Therefore, even if the terminal is under the control of the femtocell, there is a problem that the terminal continues to connect to the public system service channel and does not notice the presence of the femtocell.

  As a system selection method in which a mobile phone terminal appropriately switches to a femto cell, a method in which a femto cell base station apparatus transmits a pilot beacon is known. Patent Document 1 discloses a handoff control method for suppressing the ping-pong phenomenon in hard handoff using a pilot beacon.

  On the other hand, in recent years, the use of communication chips that employ a non-contact type short-range wireless communication system has become popular. Mobile phone terminals are also equipped with the chip and used for payment of railway fares. The feature of such near field communication is that it is necessary to bring the reader / writer and the communication chip close to a short distance of several centimeters, and the intention of the user can be confirmed by the act of approaching the reader / writer.

JP 2008-072291 A

  The femtocell base station apparatus transmits a pilot beacon to the service channel of the public system to inform the terminal of the presence of the femtocell. The terminal starts detecting the femtocell service channel in response to detecting the pilot beacon.

  However, the pilot beacon method has some disadvantages. The first disadvantage is interference with the public system due to the pilot beacon signal. The pilot beacon method is a method for outputting a beacon on the same channel as a public wave. Therefore, the pilot beacon interferes with a terminal connected to the public system. In an area where the radio wave of the public base station apparatus is weak, there may be a case where the service level on the public base station apparatus side is further deteriorated due to interference of pilot beacons emitted from the femtocell base station apparatus. Conversely, in an area where the radio wave of the public base station apparatus is strong, it is necessary to issue a pilot beacon to overcome this in order to construct a femtocell area. Pilot beacon output design is very difficult due to complicated factors.

  The second disadvantage is the effect on cost. The femtocell needs to beacon on all existing voice / data communication channels served by public base stations. Nowadays, for example, it is necessary to support a plurality of discrete band classes such as 800 MHz, 1.5 GHz, and 2 GHz, and the hardware increase of femtocells can be considered. As a result, the cost of the apparatus increases. Instead of sending pilot beacons to all multiple service channels at the same time as a method of reducing costs, a method of transmitting pilot beacons to all service channels by transmitting pilot beacons sequentially by changing the service channel by time division. Is also known. However, since it takes time to transmit pilot beacons to all service channels, it is not convenient.

  The above-described problem is a wireless communication system including a wireless base station including a short-range wireless communication reader, a wireless terminal management device, and a call processing device, and the wireless base station is configured such that the short-range wireless reader is a wireless terminal. When the ID is read, a system selection notification is transmitted to the wireless terminal management device, and the wireless terminal management device determines whether the ID is the ID of a wireless terminal that can be connected to the wireless base station. By means of a wireless communication system that connects to the public wireless communication system and transmits a base station switching instruction to a wireless terminal via the public wireless communication system. Can be achieved.

  Also, an antenna, a transmission / reception switch connected to the antenna, a transmission unit and a reception unit connected to the transmission / reception switch, and an IP packet / radio packet conversion arithmetic processing unit connected to the transmission unit and the reception unit And a wireless base station comprising an interface unit connected to the IP packet / wireless packet conversion unit and a short-range wireless communication reader, and when the short-range wireless communication reader reads the ID of the wireless terminal, a system selection notification Can be achieved by a radio base station that transmits the signal from the interface unit.

  Furthermore, an antenna, a transmission / reception switch connected to the antenna, a transmission unit and a reception unit connected to the transmission / reception switch, and an IP packet / radio packet conversion arithmetic processing unit connected to the transmission unit and the reception unit And an ID reading unit connected to the IP packet / wireless packet conversion unit, and when the ID reading unit reads the ID of the radio base station, the ID of the base station to which the ID can be connected This can be achieved by the wireless terminal device that determines the ID and changes the service channel when the connection is possible and observes it.

  According to the wireless communication system, the wireless base station, and the wireless terminal device of the present invention, system switching can be realized in a short time without causing interference to the public mobile telephone system.

It is a figure explaining the difference of the service channel of a femtocell and a macrocell. It is a figure explaining the interference to the terminal by the pilot beacon of a femtocell. 1 is a block diagram of a wireless communication system. It is a functional block diagram of a femtocell base station. This is a format of a message to be transmitted to the center device. This is the format of the message sent to the subscriber database. This is the format of the message returned by the subscriber database. A list of subscriber databases. It is a processing sequence diagram of femtocell system selection. This is the format of the message sent to the subscriber database. This is the format of the message returned by the subscriber database. It is a flowchart of the femtocell base station explaining switching by short-range radio. It is another functional block diagram of a femtocell base station apparatus. It is a functional block diagram of a terminal device. It is a flowchart of the radio | wireless terminal apparatus explaining the switch by wireless LAN SSID. It is another functional block diagram of a terminal device. It is a flowchart of the radio | wireless terminal apparatus explaining the switching by a near field radio system. It is a flowchart of the radio | wireless terminal apparatus explaining.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings using examples. The same reference numerals are assigned to substantially the same parts, and the description will not be repeated.

  In the area of the public base station, the mobile phone terminal is waiting on the service channel of the public base station. However, in order to receive the femtocell service, it is necessary to switch from the service channel of the public base station to the service channel of the femtocell when the mobile phone terminal enters the femtocell area.

  First, with reference to FIG. 1, the difference in the service channel of a femtocell and a macrocell is demonstrated. FIG. 1 (a) shows a service area using a plurality of carrier frequencies implemented in CDMA mobile communication. In FIG. 1A, a radio wave is transmitted from the macro base station 300, and a cover area of the macro base station 300 is configured. In addition, a femtocell base station 200 is set in the area, and constitutes a femtocell cover area. FIGS. 1B and 1C show the state of the service channel. 1B and 1C, the horizontal axis represents frequency and the vertical axis represents signal intensity.

  In FIG. 1B, a macro cell base station 300, which is a public service, provides a service to the terminal 100 using two service channels F2 and F3. As shown in FIG. 1B, the terminal 100 in the standby state on the service channel of F2 observes only the frequency of F2, and performs handover to change over to the connected base station as necessary. However, the service channel supported by the femto base station device. When only F1 is used as shown in FIG. 1C, the terminal cannot confirm the presence of the femtocell when the terminal device observes only F2 as described above. Therefore, even if the femtocell base station apparatus is installed, this terminal 100 is not handed over, and the effect is not produced.

  Next, the problem of the femtocell base station apparatus that transmits pilot beacons will be described with reference to FIG. In FIG.2 (c), a femto base station transmits a pilot beacon with respect to the service channel of F2 and F3. The pilot beacon is a pilot signal that informs the presence of a non-service base station. Since the pilot beacon is transmitted only in a specific time zone, it does not affect all the time-multiplexed radio channels. However, since a signal is transmitted at the same timing as a pilot issued by another station, it interferes with a specific channel for a terminal connected to the other station. In FIG.2 (b), the pilot beacon of the femtocell base station 200 has interfered with the terminal 100 connected to a macrocell base station.

  The system configuration of the wireless communication system will be described with reference to FIG. The femtocell system according to the first embodiment includes a center device including a call processing server 210, a management server 220, and a subscriber database 230, and a home device of the femtocell base station 200. The center device and the femtocell base station 200 are connected via the Internet 400. The call processing server 210 performs call connection processing. The management server 220 remotely manages the femtocell base station 200. The subscriber database 230 holds terminal information that can be connected to the femtocell base station 200.

  The call processing server 210 is connected to a public mobile switching system 320 (hereinafter referred to as MSC: Mobile services Switching Center) of the public mobile telephone system. The public mobile telephone system includes an MSC 320, a radio network controller 310 (hereinafter RNC: Radio Network Controller), and a public base station 300 (hereinafter BTS: Base Transceiver Station). The BTS 300 connects the terminal to the public mobile telephone system. The RNC 310 controls the base station 300. The MSC 320 is a mobile switch. The femtocell area is a service area managed by the femtocell base station 200. The mobile terminal 100 entering the femtocell system performs a location registration operation and is registered in the subscriber database 230. When the mobile phone terminal 100 in the femtocell area makes a call to another mobile phone terminal, the call processing server 210 that has received the call request from the mobile phone terminal searches the subscriber database 230 and registers the calling terminal. Check if it is a terminal. If the terminal is a registered terminal, a traffic channel is assigned to the femtocell to which the two terminals belong, and a call within the femtocell area becomes possible. If the communication partner is not a registered terminal in the subscriber database 230, a traffic channel is allocated in the femtocell base station 200 to which the calling terminal belongs, and a procedure for setting an outgoing call to the other public mobile telephone system is performed. To implement. With the above outgoing call setting, incoming paging is applied from the BTS 300 of the public network to another terminal, and a call can be made.

  The configuration of the femtocell base station 200 will be described with reference to FIG. In FIG. 4, a femtocell base station 200 includes an antenna 201, a deplexer (DUP) 202, a radio reception unit (RX) 203, a transmission unit (TX) 204, a central processing unit (CPU) 205, a network I / F 206, a short distance. The wireless communication reader 207 is configured.

  A signal received by the antenna 201 is sent to the wireless reception unit 203 via the deplexer 202. The wireless reception unit 203 performs RF processing and baseband processing, and performs signal reception and decoding processing. After the baseband signal processing, the CPU 205 performs processing for returning to the IP packet, and is sent to the network through the network interface 206. Further, the CPU 205 processes data received from the network into a wireless packet. The wireless transmission unit 204 performs baseband processing and RF processing on the wireless packet. The signal after the RF processing is transmitted from the antenna 201 via the deplexer 202. Through the above-described reception processing, information such as location registration transmitted from the terminal is sent to the center apparatus as an IP packet.

  The femto base station 200 includes a short-range wireless reader 207. The reader 207 detects a short-range wireless device attached to the terminal 100 and reads its ID. The read ID is sent to the CPU 205. The CPU 205 creates a system selection notification message based on the obtained result and reports it to the management server 220 via the network I / F 306.

  With reference to FIG. 5, a system selection notification message transmitted from the femtocell base station 200 to the management server 220 will be described. In FIG. 5, the system selection notification message 600 includes a transmission destination address 601, a message ID 602, and a short-range wireless ID 603. The transmission destination address 601 describes the address of the management server 220. The message ID 602 describes a message ID indicating that it is a system selection notification message. The short-range wireless ID 603 is short-range wireless information and is an ID that can identify a terminal.

  With reference to FIG. 6, the inquiry message transmitted from the management server 220 to the subscriber database 230 will be described. In FIG. 6, the inquiry message 610 includes a transmission destination address 611, a message ID 612, an identification number 613, and a short-range wireless ID 614. The transmission destination address 611 describes the address of the subscriber database 230 that is the transmission destination. The message ID 612 describes a message ID indicating an inquiry. Identification No. 613 describes an identification number for correspondence with the response to the message. The short-range wireless ID 614 describes an ID that can identify the terminal transmitted from the femtocell base station 200.

  A response message transmitted from the subscriber database 230 to the management server 220 will be described with reference to FIG. In FIG. 7, the response message 620 includes a transmission destination address 621, a message ID 622, an identification number 623, and a subscriber telephone number 624. The transmission destination address 621 describes the address of the management server 220. The message ID 622 describes a message ID indicating a response. Identification No. 623 describes the identification number previously assigned for identification when the management server 220 inquires the subscriber database 230 about the telephone number. The subscriber telephone number 624 describes the telephone number of the corresponding terminal.

  With reference to FIG. 8, a correspondence list held in the subscriber database will be described. In FIG. 8, the correspondence list 700 includes a short-range wireless ID 701 and a subscriber telephone number 702. From the correspondence list 700, the telephone number of the corresponding terminal can be searched from any short-range wireless ID.

  The system selection processing operation will be described with reference to FIG. In the service area of the public mobile phone system, the mobile phone terminal 100 is waiting for the service channel of the public mobile phone system. The cellular phone terminal 100 incorporating the short-distance wireless communication chip is brought close to the femtocell base station 200 with a built-in / external reader for the short-distance wireless communication by the user's operation (S100). The femtocell base station 200 reads the short-range wireless communication information of the mobile phone terminal 100 (S101). The information includes an ID that can identify the terminal. The femtocell base station 200 transmits a “system selection notification” message to the management server 220 based on this information (S102).

  The management server 220 that has received this makes an inquiry to the subscriber database 230 based on the ID (S103). The subscriber database 230 that has received this refers to a list of correspondence between the telephone number of the mobile phone terminal registered in advance in the subscriber database and the ID for identifying the terminal, obtains the telephone number of the terminal, The number is transmitted to the management server 220 (S104).

  The management server 220 transmits a system selection notification to the call processing server 210 based on the telephone number (S105). When the call processing server 210 is instructed to notify the system selection, the call processing server 210 sends a “system selection instruction” to the corresponding mobile phone terminal 100 using the short message service based on the subscriber telephone number included in the message. ". For this reason, the call processing server 210 first transmits this instruction to the MSC 320 as a short message (S106).

  The MSC 320 that has received the short message instructs the BTS 300 to transmit the short message via the RNC 310 (S106 to S108).

  The BTS 300 receives the short message and instructs the mobile phone terminal 100 to change the standby from the public base station 300 to the femtocell base station 200 using the short message (S109).

  The mobile phone terminal 100 that has received the instruction switches the standby from the public base station 300 to the femtocell base station 200 (S110). Specifically, in FIG. 1, the terminal connected to the service channel of F2 observes the service channel of F1, and if it is found that there is a sufficient level, the corresponding femtocell base station in F1 Access the device and perform location registration.

  Accordingly, a location registration message is notified to the MSC 320 via the femtocell base station 200, and the terminal can receive services in the femtocell (S111 to S113).

  In FIG. 9, the case where standby is switched from the public base station 300 to the femtocell base station 200 has been described. Conversely, the case where the user 10 moves from the femtocell area to the public base station area will be described below. In this case, the radio wave of the femtocell base station 200 is weakened as the mobile phone terminal 100 moves away from the femtocell area. Eventually, the mobile phone terminal 100 is out of the femtocell area. Once the mobile phone terminal 100 is out of service area, the mobile phone terminal 100 returns to the operation in the normal public telephone system, detects / selects the channel of the public base station 300, and registers the location in the public base station 300.

  In the first embodiment, when a system is selected, a system selection opportunity is transmitted to the mobile phone terminal 100 using a short message of the public mobile phone system. This is effective in an area where radio waves of the public base station 300 reach.

  On the other hand, in the area where the public base station area is not sufficiently configured, it may be considered that the first embodiment does not function. That is, the short message may not reach the terminal 100 in some cases. In such an area, as described above, even a weak pilot beacon can directly notify the terminal of the presence of a femto cell. Therefore, such a new problem can be solved by using the present embodiment together with the pilot beacon.

  In the first embodiment, the case of personal use is shown. However, if the first embodiment is used, the user consciously specifies and selects a femtocell to be used in an environment where a plurality of femtocells are installed adjacent to each other for corporate use. This can be easily solved.

  In the first embodiment, a short-range wireless communication reader 207 is built in the femtocell base station 200. However, the essence is switching of a mobile telephone system using another communication method, and is not limited to this. Specifically, in conjunction with a system such as door locking using short-range wireless communication, a series of operations may be activated when the return of the terminal is detected. Therefore, the entity that sends the “system selection notification” to the center device does not need to be a femtocell base station.

  In FIG. 6, the identification number is attached to the message, and the search request ID and the search result (telephone number) in the subscriber database are used for collation. A method may be used in which it is regarded as an identification number.

  FIG. 10 shows a message format 610A for inquiring to the subscriber database 230 in the modified embodiment. As is clear from the comparison with the message format 610 of FIG.

  FIG. 11 shows a response message format 620A of the modified embodiment. As is clear from the comparison with the response message format 620 in FIG. 7, the identification number 623 is replaced with the short-range wireless communication ID 625 in the response message format 620A.

  With reference to FIG. 12, the processing operation of the femtocell base station 200 will be described. In FIG. 12, in step 500, the femtocell base station 200 activates a short-range wireless system built therein and observes radio waves. The femtocell base station 200 repeats the observation until an adjacent chip is observed. When a nearby chip is observed, the femtocell base station 200 performs communication, reads the chip ID, and determines whether the ID matches the ID registered in the femtocell (S501). When they do not match, the femtocell base station 200 returns to Step 500. When they match in step 501, the femtocell base station 200 reports to the center device that a preset ID has been detected (S502). For the report, the “system selection notification” message described in FIG. 5 is used.

  In the first embodiment, the short-distance wireless communication is used, and the femtocell base station detects that a prescribed terminal is approaching. In the second embodiment, conversely, it is detected that the terminal has approached the femtocell base station using the wireless LAN.

  Specifically, when a specific SSID (Service Set ID) is detected in the wireless LAN, the mobile terminal 100A switches the standby from the public base station 300 to the femtocell base station 200A. Here, the SSID is an identifier of a wireless LAN access point. At this time, the mobile terminal 100 notifies the location registration to the MSC 320 via the femtocell base station 200A. The terminal 100 can receive services at the femtocell base station 200A.

  The configuration of the femtocell base station 200A according to the second embodiment will be described with reference to FIG. In FIG. 13, a femtocell base station 200A includes an antenna 201, a deplexer (DUP) 202, a radio reception unit (RX) 203, a transmission unit (TX) 204, a central processing unit (CPU) 205, a network I / F 206, a wireless LAN. The transmission / reception unit 208 is configured.

  The deplexer 202 transmits the signal received by the antenna 201 to the wireless reception unit 203. The radio receiving unit performs RF processing and baseband processing to perform signal reception and decoding processing. After the baseband signal processing, the CPU 205 performs processing for returning to the IP packet and sends it to the network through the network interface 206.

  Further, the CPU 205 processes data received from the network into a wireless packet. The wireless transmission unit 204 performs baseband processing and RF processing. The demultiplexer 202 transmits the RF-processed signal from the antenna 201. The femtocell base station 200A includes a wireless LAN transmission / reception unit 208. The wireless LAN transmission / reception unit 208 transmits an SSID that identifies the femtocell base station 200A.

  With reference to FIG. 14, the configuration of the terminal device 100A according to the second embodiment will be described. In FIG. 14, a terminal device 100A includes an antenna 101, a deplexer (DUP) 102, a wireless reception unit (RX) 103, a transmission unit (TX) 104, a central processing unit (CPU) 105, an application CPU 106, and a wireless LAN transmission / reception unit 108. Consists of

  In FIG. 14, the deplexer 102 transmits the signal received by the antenna 101 to the wireless reception unit 103. The wireless reception unit 103 performs RF processing and baseband processing, and performs signal reception and decoding processing. After the baseband signal processing, the CPU 105 performs processing for returning to the IP packet and sends it to the CPU 106 which is an application execution unit.

  The CPU 105 processes the IP packet sent from the application execution CPU 106 into a wireless packet. The wireless transmission unit 104 performs baseband processing and RF processing on the wireless packet, and transmits the wireless packet from the antenna 101 via the deplexer 102. The terminal device 100A includes a wireless LAN transmission / reception unit 108. When receiving the wireless LAN signal from the femto base station 200A, the wireless LAN transceiver 108 identifies the SSID.

  With reference to FIG. 15, the operation flow of the terminal device 100A will be described. The processing flow in FIG. 15 is performed by the CPU 105 of the terminal device 100A. In FIG. 15, first, the CPU 105 observes radio waves of the wireless LAN system (S520). If the wireless LAN signal cannot be detected, the CPU 105 attempts to detect the wireless LAN signal again (S520) after the reception is suspended for a certain period (S524). If a wireless LAN signal is detected in step 520, the CPU 105 checks the SSID of the received signal (S521). When the confirmed SSID is registered in the terminal 100 in advance, the CPU 105 confirms the reception level. If the reception level is equal to or greater than the threshold, the CPU 105 switches to the femtocell service channel and confirms the reception level (S522). In step 521, when the SSID is different from the preset value or when the reception level is not sufficient, the CPU 105 moves to step 524.

  If the reception level is sufficient in step 522, the CPU 105 performs switching to the femto cell (S523). If the reception level is insufficient or the signal cannot be detected in step 522, the process returns to the original service channel and returns to step 524.

  The same idea as in the second embodiment can be realized using short-range wireless communication. In this case, the femtocell base station is not provided with a short-range wireless communication reader as shown in FIG. 4, but the terminal 100B is provided with a short-range wireless communication reader as shown in FIG. On the other hand, the femtocell base station 200B has a short-range wireless communication chip mounted on the outer surface of the casing. The short-range wireless communication chip operates in response to radio waves from the short-range wireless communication reader. That is, the short-range wireless communication chip does not interact with other functional blocks of the femtocell base station 200B. Therefore, it cannot be expressed as a block diagram and is not shown.

  With reference to FIG. 16, the structure of the terminal device 100B of Example 3 is demonstrated. In FIG. 16, a terminal device 100A includes an antenna 101, a deplexer (DUP) 102, a wireless reception unit (RX) 103, a transmission unit (TX) 104, a central processing unit (CPU) 105, an application CPU 106, and a short-range wireless communication reader. 107.

  In FIG. 14, the deplexer 102 transmits the signal received by the antenna 101 to the wireless reception unit 103. The wireless reception unit 103 performs RF processing and baseband processing, and performs signal reception and decoding processing. After the baseband signal processing, the CPU 105 performs processing for returning to the IP packet and sends it to the CPU 106 which is an application execution unit.

  The CPU 105 processes the IP packet sent from the application execution CPU 106 into a wireless packet. The wireless transmission unit 104 performs baseband processing and RF processing on the wireless packet, and transmits the wireless packet from the antenna 101 via the deplexer 102. The terminal device 100B includes a short-range wireless communication reader 107. When the short-range wireless communication reader 107 receives a short-range wireless communication radio wave from the femto base station 200B, the short-range wireless communication reader 107 identifies the short-range wireless communication ID.

  The operation flow of the terminal device 100B will be described with reference to FIG. The processing flow in FIG. 17 is performed by the CPU 105 of the terminal device 100A. In FIG. 17, the CPU 105 first activates the short-range wireless communication system reader 107 and observes radio waves (S510). When the short-range wireless communication signal cannot be detected, the CPU 105 tries to detect the short-range wireless communication signal again (S510) after the reception is stopped for a certain period (S514). If a short-range wireless communication signal is detected in step 510, CPU 105 confirms the ID for identifying the femtocell base station by communication (S511). When the confirmed ID is previously registered in the terminal 100, the CPU 105 switches the service channel to the previously registered service channel for femtocells. Then, the CPU 105 confirms the reception level (S512). If the reception level is sufficient, the CPU 105 switches to the femtocell (S513). If the reception level is sufficient in step 512, if the reception level is insufficient or the signal cannot be detected, the process returns to the original service channel and returns to step 514. If it is determined in step 511 that the ID is different from the preset value, the process proceeds to step 514.

  DESCRIPTION OF SYMBOLS 100 ... Mobile phone terminal, 101 ... Antenna, 102 ... DUP, 103 ... RX, 104 ... TX, 105 ... CPU, 106 ... Application CPU, 107 ... Near field communication reader, 108 ... Wireless LAN transmission / reception part, 200 ... Femtocell Base station, 201 ... antenna, 202 ... DUP, 203 ... RX, 204 ... TX, 205 ... CPU, 206 ... NW-I / F, 207 ... Near field communication reader, 208 ... Wireless LAN transceiver, 210 ... Call processing Server 220 ... Management server 230 ... Subscriber database 300 ... BTS 310 ... RNC 320 ... MSC

Claims (6)

A wireless communication system comprising a wireless base station equipped with a short-range wireless communication reader, a wireless terminal management device, and a call processing device,
When the short-range wireless reader reads the ID of the wireless terminal, the wireless base station transmits a system selection notification to the wireless terminal management device,
The wireless terminal management apparatus determines whether the ID is an ID of a wireless terminal connectable to the wireless base station. When the wireless terminal management apparatus is connectable, the telephone number of the public wireless communication system of the wireless terminal is transmitted to the call processing apparatus. Send
The call processing apparatus is connected to the public wireless communication system, and transmits a base station switching instruction to the wireless terminal via the public wireless communication system. The wireless communication system according to claim 1,
The wireless communication system, wherein the call processing device transmits a base station switching instruction to the wireless terminal using a short message service. An antenna, a transmission / reception switch connected to the antenna, a transmission unit and a reception unit connected to the transmission / reception switch, and an IP packet / wireless packet conversion arithmetic processing unit connected to the transmission unit and the reception unit And a wireless base station comprising an interface unit connected to the IP packet / wireless packet conversion unit and a short-range wireless communication reader,
A radio base station that transmits a system selection notification from the interface unit when the short-range wireless communication reader reads an ID of a wireless terminal. The radio base station according to claim 3,
Furthermore, a pilot beacon transmission unit for transmitting a pilot beacon is provided,
A radio base station that transmits a pilot beacon from the pilot beacon transmitter when the short-range wireless communication reader reads an ID of a wireless terminal. An antenna, a transmission / reception switch connected to the antenna, a transmission unit and a reception unit connected to the transmission / reception switch, and an IP packet / wireless packet conversion arithmetic processing unit connected to the transmission unit and the reception unit A wireless terminal device comprising an ID reading unit connected to the IP packet / wireless packet conversion unit,
When the ID reading unit reads an ID of a radio base station, it is determined whether this ID is an ID of a connectable base station. When the ID is connectable, a service channel is changed and observation is performed. apparatus. The wireless terminal device according to claim 5,
The ID reading unit reads a wireless LAN access point ID or a short-range wireless communication ID.

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