JP4981078B2 - Wireless communication system and wireless communication terminal - Google Patents

Description

  The present invention relates to a radio communication system in which one terminal communicates using a plurality of radio systems, and in particular, a high-speed switching technique between a plurality of radio communication systems and a cognitive radio for improving the time utilization efficiency of frequency. Regarding technology.

  Bands of 6 GHz or less (VHF, UHF, low microwave band), which are easy to use for mobile communication systems, are currently being used closely for communication by third-generation mobile phones and wireless LANs. It has become. Under these circumstances, a system that uses multiple radio waves, such as mobile communications, in order to secure the frequency band necessary for mobile communications with particularly high needs, while making more effective and efficient use of tight radio waves There is a need for technologies that enable advanced shared use of radio waves.

  In terms of policy, “e-Japan Priority Plan-2004” (Non-Patent Document 1) by IT Strategy Headquarters of the Ministry of Internal Affairs and Communications There is a need for a technology that realizes that a wireless communication system capable of establishing an optimal communication environment by flexibly selecting a method, a multiplexing method, and the like will be put to practical use by 2011.

  In order to realize these requirements, the concept of “cognitive radio” that recognizes the radio situation and performs resource control of the radio system in accordance with the situation was announced in 1999 (Non-Patent Document 2, Non-Patent Document 3). ). However, there are various approaches for realizing cognitive radio, and studies are ongoing.

  In communication in a multi-mode wireless system, a technique has been proposed in which a wireless system is determined on the base station side and a wireless system is designated from the base station side to the terminal side (Patent Documents 1 and 2).

JP 2003-169379 A Japanese Patent Laid-Open No. 2005-20477

IT Strategy Headquarters, Ministry of Internal Affairs and Communications: “e-Japan Priority Plan 2004” (June 2004) Mitora, "Cognitive radio for flexible mobile multimedia communications", 1999 IEEE Int Workshop on Mobile Multimedia Communications Digest (Nov. 1999). Mitora, "Cognitive Radio: Making Software Radios More Personal", 1999 IEEE Personal Communication, vol.6, No.4 (1999).

  In a system with multiple wireless systems that determine the wireless system on the network side and assign it to the terminal side, in an environment where the radio wave conditions fluctuate due to frequent movement of many terminals, the base station side performs the next communication. Even if a method is specified and transmitted to the terminal, there are situations where the wireless method cannot be used due to fluctuations in radio wave conditions.

  In Patent Documents 1 and 2, only one radio system to be communicated next is designated on the base station side and transmitted to the terminal side. Further, the radio system is determined only on the base station side, and information on the terminal side is not taken into consideration. For this reason, since the radio wave condition fluctuates due to frequent movement of terminals, increase / decrease of the number of terminals, etc., there are cases where the wireless method determined only by the base station cannot be used.

A typical example of the present invention is as follows. That is, a wireless communication system including a base station that accommodates a plurality of wireless systems, and a terminal that communicates with the base station by the plurality of wireless systems, wherein the wireless communication system is connected to the base station. The base station includes an access point of each wireless system, a gateway that terminates each wireless system, and a control node that controls each gateway, and the monitoring node is information indicating a state of each wireless system And the control node indicates a priority order of a radio system used by the terminal among the plurality of radio systems based on information indicating a state of each radio system collected by the monitoring node. Determines the priority of the radio system to be communicated in the future, and the base station The prior is received from the control node, information indicating which radio system the terminal can use and information indicating the radio system desired by the terminal are received from the terminal, and the received terminal will communicate in the future. A wireless system with which the terminal will communicate in the future based on the priority of the wireless system to be used, the information indicating which wireless system the received terminal can use, and the information indicating the wireless system desired by the terminal The paging signal of a radio system having a wide service area among the plurality of radio systems is transmitted to the terminal including information indicating the radio system to be communicated by the terminal in the future. A plurality of transmission units and reception units corresponding to the wireless system, and a control unit for controlling the transmission unit and the reception unit, the control unit , Based on information indicating a wireless system with which the determined terminal communicates in the future included in the paging signal transmitted from the base station, determines the wireless system to communicate with, and corresponds to the wireless system determined to communicate The receiving unit is activated to start communication with a communication partner, and the receiving unit corresponding to the wireless system determined not to communicate is set to a sleep state.

  ADVANTAGE OF THE INVENTION According to this invention, the disconnection of the communication by the fluctuation | variation of the electromagnetic wave state which arises by the frequent movement of a terminal and the increase / decrease in the number of terminals can be prevented, and the switching of the wireless system according to a wireless condition is realizable.

  The problem to be solved by the present invention, the features of the present invention, and the operation of the present invention will be clarified from embodiments described below with reference to the drawings.

It is a block diagram which shows the structure of the portable terminal device used for the multimode radio | wireless system of the 1st Embodiment of this invention. 1 is an overall configuration diagram of a multimode wireless system according to a first embodiment of this invention. It is explanatory drawing of operation | movement of the portable information terminal device of the 1st Embodiment of this invention. It is explanatory drawing of operation | movement of the portable information terminal device of the 1st Embodiment of this invention. It is explanatory drawing of operation | movement of the portable information terminal device of the 1st Embodiment of this invention. It is a sequence diagram of the 1st Embodiment of this invention. It is a flowchart which shows the operation | movement by the side of the terminal of the 1st Embodiment of this invention. It is a network figure at the time of the terminal movement in the conventional cognitive radio system. It is a network diagram at the time of the terminal movement in the radio | wireless system of the 1st Embodiment of this invention. It is a block diagram which shows the information collection function of the terminal of the 1st Embodiment of this invention. It is a sequence diagram of the 2nd Embodiment of this invention. It is a flowchart which shows the operation | movement by the side of the terminal of the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is a block diagram illustrating a configuration of a mobile terminal device used in the multimode wireless system according to the first embodiment of this invention. In the present embodiment, the operation of a mobile terminal device having a plurality of wireless systems as shown in FIG. 1 will be described.

  To the paging signal 30 of the wireless method 1 transmitted from the base station side, ID information to which the priority of the wireless method to be used in the future (for example, the wireless method to be used next) is added is added. The paging signal 30 is received by the receiving unit 32 of the wireless method 1 on the terminal side. The control unit 38 of the wireless system 1 performs data control of the physical layer and the MAC layer. Based on the ID information describing the priority of the wireless method, information on the wireless method that can be used on the terminal side, and information on the wireless method that the terminal desires to use, the control unit 38 of the wireless method 1 communicates next. Determine the wireless system to perform.

  Information on the wireless system that the terminal desires to use is stored in the terminal information processing unit 40. The wireless system information that can be used on the terminal side is organized by the control unit 38 based on information collected from the wireless system 1 receiving unit 32, the wireless system 2 receiving unit 34, and the wireless system 3 receiving unit 36. Specifically, information acquired from wireless systems having different acquisition timings (for example, data acquisition speed) is converted into a comparable format (for example, correction and / or normalization).

  The control unit 38 of the wireless system 1 notifies the power control unit 39 of ID information of the wireless system to be communicated next. The power control unit 39 transmits an activation message to the wireless reception unit (32, 34, or 36) in which the ID information is described, and activates the reception unit (a state where power is completely supplied to the reception unit). ). A sleep message is transmitted to a receiving unit that does not perform other communication, and a sleep state (a state that operates with a minimum required power) is set.

  The priority ID information is not necessarily transmitted by the paging signal of the wireless method 1, and the paging signal of the wireless method 2 or the paging signal of the wireless method 3 may be used. For example, normally, the priority information may be transmitted by a paging signal of the wireless method 1 having a wide communication area. However, when the paging signal of the wireless method 1 cannot be used, the paging signal of the wireless method 2 or the wireless method 3 is used. The priority information may be transmitted by the paging signal.

  FIG. 2 is an overall configuration diagram in a multi-mode radio system showing a configuration including a base station that transmits a paging signal of radio scheme 1 described with reference to FIG.

  In the example shown in FIG. 2, three systems are connected: cdma1xEVDO (1x Evolution Data Only) as a cellular system, WiMAX as an outdoor broadband system in an urban area, and a wireless LAN (Local Area Network) as a broadband system for short distance and indoor use. Has been. Any other system can be applied to the wireless system of the present invention as long as it has an equivalent function.

  The communication system according to the first embodiment of the present invention includes a cognitive terminal 701, a cdma2000 EV-DO wireless base station 102, a wireless LAN base station 103, a WiMAX wireless base station (104), and a gateway device for an EV-DO wireless system ( PDSN: Packet Data Serving Node (105), Wireless LAN system gateway device (PDIF: Packet Data Interworking Function) 106, and WiMAX system gateway device (ASN-GW: Access Serving Network Gateway) 107, Agate H Authentication common station (AAA) 703, monitoring node 704, and network 112. The cognitive base station 702 accommodates the cdma2000 EV-DO radio base station 102, the wireless LAN base station 103, the WiMAX radio base station 104, the PCF / PDSN 105, the PDIF 106, and the ASN-GW 107 and the HA 108.

  The cognitive base station 702 includes a monitoring node (CMT) 704 in order to grasp the radio conditions of different radio systems, and information related to radio (for example, each system) from the access point of each system by the monitoring node 704. Information on the status of the). The monitoring node 704 receives information about the radio from the access point of each system (cdma2000 EV-DO radio base station 102 for EVDO, radio LAN base station 103 for wireless LAN, WiMAX radio base station 104 for WiMAX). To collect.

  A control node 705 is provided between the network 112 and the gateway of each wireless system (PDSN 105 in the case of EVDO, PDIF 106 in the case of wireless LAN, and ASN-GW 107 in the case of WiMAX). The control node 705 determines the priority of the wireless system that performs the next communication in accordance with an instruction from the monitoring node 704.

  Information about the radio includes a received power value, RSSI value, throughput of each user, transmission speed, packet loss, number of terminals connected to the access point, processing load at the access point, and the like. In the case of EVDO, in addition to this, the values of various parameters used for scheduling in the radio section, such as DRC values and RRI values, may also be included in the radio information. The radio information is statistically processed in the monitoring node 704. Further, in addition to the statistically processed radio information, the priority of the radio system to be communicated next is set in consideration of spatial information such as the position and moving direction of the terminal 701.

  In such a multi-mode system, when the wireless system 1 is EVDO, paging is performed in cooperation with the EVDO system including the monitoring node 704, the control node 705, the PDSN 105, and the base station 102. As shown in FIG. 1, the paging signal 30 describes ID information in which the priority of the wireless method for performing communication next set by the control node 705 is set.

  Next, with reference to FIG. 1, a procedure for determining a radio system for performing next communication on the terminal side will be described.

  On the terminal side, the paging signal 30 including the ID information in which the priority of the next wireless communication is set is received from the base station. On the base station side, the paging signal 30 is received by the receiving unit 32 of the wireless system 1.

  Further, the terminal 701 stores in the information processing unit 40 information on a wireless method that the user desires to use. The information is transmitted to the control unit 38 of the wireless system 1. Then, the receiving units 32, 34, and 36 of each wireless method receive signals corresponding to beacons of each wireless method. Information included in the signal corresponding to this beacon is sent to the control unit 38 of the wireless system 1. The control part 38 can grasp | ascertain which radio | wireless system a terminal can use with the information contained in the signal equivalent to this beacon.

  The control unit 38 of the wireless system 1 includes information on the wireless system desired to be used on the terminal side, information on which wireless system the terminal can use, and the priority of the wireless system to be used next transmitted from the base station Next, the radio system to be used is determined based on the paging signal 30 including the above information. The power control unit 39 activates the wireless reception unit that actually performs communication, and sets the other wireless reception units to the sleep state.

  Next, the operation on the terminal side after determining the next wireless method to be used by the control unit 38 of the wireless method 1 on the terminal side will be described with reference to FIG.

  Based on the above-described paging signal 30 and information from the terminal, the wireless system 1 control unit 38 determines that the wireless system to be next communicated is the wireless system 1. After that, the power control unit 39 puts the wireless system 2 receiving unit 34, the wireless system 2 transmitting unit 35, the wireless system 3 receiving unit 36, and the wireless system 3 transmitting unit 37 into a sleep state.

  Next, the operation on the terminal side after determining the radio system to be used next by the control unit 38 of the radio system 1 on the terminal side will be described with reference to FIG. FIG. 4 is an explanatory diagram of the operation of the mobile terminal device when the wireless method for performing the next communication is the wireless method 2.

  Based on the above-described paging signal 30 and information from the terminal, the wireless system 1 control unit 38 determines that the wireless system to be communicated next is the wireless system 2. Thereafter, the power control unit 39 activates the reception unit 34 and the transmission unit 35 of the wireless method 2. In addition, the wireless system 1 transmitting unit 33, the wireless system 3 receiving unit 36, and the wireless system 3 transmitting unit 37 are set in the sleep state.

  Next, the operation on the terminal side after determining the radio system to be used next by the control unit 38 of the radio system 1 on the terminal side will be described with reference to FIG.

  Based on the above-described paging signal 30 and information from the terminal, the wireless system 1 controller 38 determines the wireless system 3 to be used for the next communication. Thereafter, the power control unit 39 activates the reception unit 36 and the transmission unit 37 of the wireless method 3. In addition, the wireless system 1 transmitting unit 33, the wireless system 2 receiving unit 34, and the wireless system 2 transmitting unit 35 are set in a sleep state.

  A communication procedure according to the first embodiment of this invention will be described with reference to FIG. FIG. 6 is a sequence diagram of the first embodiment of the present invention.

  A signal 500 corresponding to a beacon is transmitted from the base station radio system 1 system 850 to the terminal radio system 1 system 950. A signal 502 corresponding to a beacon is transmitted from the base station wireless system 2 system 851 to the terminal wireless system 2 system 951. A signal 504 corresponding to a beacon is transmitted from the base station radio system 3 system 852 to the terminal radio system 3 system 952. When the terminal receives the beacon, the terminal is activated (501, 503, 505).

  The paging signal 506 transmitted from the base station side wireless system 1 system 850 describing the priority of the next wireless system to be communicated is transmitted to the terminal wireless system 1 system 950. The terminal wireless system 1 system 950 determines the wireless system to be communicated next based on the wireless system information 520 desired on the terminal side and the information 507, 508, and 509 transmitted from each wireless system. (510).

  Next, when it is determined that communication is performed using the wireless system 3, the wireless system 1 system 950 of the terminal transmits an activation message to the wireless system 3 system 952 (511), and the wireless system 3 system 952 enters the activated state. (512). Further, a sleep message is transmitted to the wireless system 2 system 951 (513), and the wireless system 2 system 951 enters a sleep state (514).

  The terminal wireless system 3 system 952 transmits a reply message to the base station wireless system 3 system 852 (515), and the base station wireless system 3 system 852 transmits a CN (corresponding node) 800 that is a communication partner. A reply message is transmitted to (516). The CN 800 transmits a response message to the wireless system 3 system 852 of the base station (517). The terminal wireless system 3 system 852 transmits a response message to the terminal wireless system 3 system 952 (518).

  Next, the operation on the terminal side will be described with reference to FIG. FIG. 7 is a flowchart showing the operation on the terminal side according to the first embodiment of this invention.

  The terminal has entered a sleep state after a predetermined time (X seconds) has elapsed since the last communication (200). Next, it waits for a paging signal that is transmitted from the base station and that describes the priority of the radio system to be communicated next (201). As a result, when the paging signal cannot be detected, the sleep state is entered again (200). If a paging signal is detected, paging signal reception processing is performed (202).

  Thereafter, wireless information on the terminal side is collected (203). The radio information on the terminal side is information on a radio system that can actually be used on the terminal side and information on a radio system that the terminal side desires to use. Then, based on the wireless system priority information included in the paging signal received from the base station and the collected wireless information on the terminal side, the wireless system ID is analyzed, and wireless communication is performed next on the terminal side. The method is determined (204).

  Thereafter, it is determined whether or not the determined wireless method information designates wireless method 1 (205). If the ID information of the wireless system 1 is designated, the wireless system 1 is activated (206) and communication is started (207). On the other hand, if the wireless method 1 is not designated, it is determined whether or not the wireless method 2 ID information is designated (208). If the wireless method 2 is designated, the wireless method 2 is activated (209), and communication is started (210). On the other hand, if the wireless method 2 is not designated, the wireless method 3 is activated (211) and communication is started (212).

  Note that the receiving unit in the sleep state does not enter the activated state even if the paging signal is detected, but may receive the paging signal periodically. In this case, the time interval for receiving the paging signal may be changed according to the wireless method in the activated state.

  The operation of the wireless system according to the first embodiment will be described with reference to FIGS.

  In the conventional method shown in FIG. 8, when, for example, WiMAX is designated as a wireless method by the paging signal 721 from the base station 720, the terminal 724 moved to the WiMAX communication area 722 moves out of the WiMAX communication area 722, and EVDO A terminal 725 that has moved to an area 723 that can only communicate cannot communicate. However, as shown in FIG. 9, in the embodiment of the present invention, the priority information (for example, 1 WiMAX, 2 EVDO) of the wireless system used by the terminal is specified in the paging signal 720 from the base station. Furthermore, if the terminal side has information 726 that EVDO can actually be used, communication is possible even if the terminal 724 moves from the WiMAX communication area 722 to the EVDO area 723.

  Next, the function of collecting information on the terminal side according to the first embodiment will be described with reference to FIG.

  In addition to the paging signal 900 of the wireless method 1, the terminal receives signals 901 to 903 corresponding to beacons in each wireless method. Each terminal can grasp which radio system can be used by a signal corresponding to this beacon. Information on available wireless systems and information on wireless systems desired to be used on the terminal side are stored in the information processing unit 909. The paging signal whose priority is designated from the base station side is sent to the control unit 907. The wireless information on the terminal side is transmitted from the information processing unit 909 to the control unit 907. Based on the information received from the base station and the radio information on the terminal side, the control unit 907 determines a radio scheme for the next communication. After that, the power control unit 909 transmits an activation message to a wireless transmission / reception unit that actually performs communication, and transmits a sleep message to a wireless transmission / reception unit that does not perform communication.

  As described above, in the first embodiment of the present invention, the priority of the next radio system to be communicated is set on the base station side, and the information is transmitted to the terminal side by radio system 1 paging. . The terminal collects information on the radio system that it wants to use and information on the radio system that can actually be used, and determines the radio system that will perform the next communication based on the information from the base station and the information on the terminal . As a result, the disconnection of the communication due to the fluctuation of the radio wave condition can be prevented, and the switching of the radio system according to the radio condition can be realized.

<Embodiment 2>
In the first embodiment described above, the priority of the radio system to be communicated next is determined on the base station side, the information is transmitted to the terminal by the paging signal 30 of the radio system 1, and the terminal side wishes to use it. Based on the information on the wireless system and the information on the wireless system that can actually be used on the terminal side, the wireless system on which communication is performed next is determined on the terminal side. However, in the second embodiment described below, the base station side determines the priority of the radio system to be communicated next, and the terminal side wants to use the radio system information and the terminal side actually uses it. It receives information on possible wireless systems, and determines a wireless system to perform next communication. In this case, the ID information of the wireless system to be communicated next determined on the base station side is transmitted to the terminal side by the paging signal 30.

  A communication procedure according to the second embodiment of the present invention will be described with reference to FIG. FIG. 11 is a sequence diagram of the second embodiment of the present invention.

  A signal 500 corresponding to a beacon is transmitted from the base station radio system 1 system 850 to the terminal radio system 1 system 950. A signal 502 corresponding to a beacon is transmitted from the base station wireless system 2 system 851 to the terminal wireless system 2 system 951. A signal 504 corresponding to a beacon is transmitted from the base station radio system 3 system 852 to the terminal radio system 3 system 952. When the terminal receives the beacon, the terminal is activated (501, 503, 505).

  The wireless system 1 system 950 of the terminal transmits the wireless system information desired on the terminal side and the information 507, 508, and 509 transmitted from each wireless system to the wireless system 1 system 850 of the base station ( 550). The base station wireless system 1 system 850 determines the wireless system to be communicated next based on the information 570 in which the priority of the wireless system to be communicated next is set and the information 550 transmitted from the terminal ( 551). The determined wireless method information is transmitted to the terminal wireless method 1 system 950 by a paging signal (552).

  Next, when it is determined that communication is performed using the wireless method 3, the terminal wireless method 1 system 950 transmits an activation message to the terminal wireless method 3 system (553), and the terminal wireless method 3 system is activated. (554). Further, the wireless system 1 system 950 of the terminal transmits a sleep message to the wireless system 2 system 951 (555), and the wireless system 2 system 951 enters the sleep state (556). Further, the wireless system 1 system 950 of the terminal may transmit a sleep message to the wireless system 1 system 950 (self) (557), and the wireless system 1 system 950 may enter a sleep state (558).

  The terminal wireless system 3 system 952 transmits a response message to the base station wireless system 3 system 852 (559), and the base station wireless system 3 system 852 transmits a response message to the CN (Corresponding Node) 800. Transmit (560). The CN 800 transmits a reply message 559 to the wireless system 3 system of the base station (861). The terminal wireless system 3 system 852 transmits a response message to the terminal wireless system 3 system 952 (562).

  Next, the operation on the base station side will be described with reference to FIG. FIG. 12 is a flowchart showing the operation on the terminal side according to the second embodiment of the present invention.

  Radio information on the terminal side is collected (220). The radio information on the terminal side is information on a radio system that can actually be used on the terminal side and information on a radio system that the terminal side desires to use. Thereafter, the terminal transmits the collected wireless information to the base station (221). On the base station side, a radio system to be communicated next is determined based on the radio system priority information and the radio information received from the terminal side, and the determined radio system information is determined by the radio system 1 of the terminal by a paging signal. To the system 950.

  The terminal wireless system 1 system 950 waits for a paging signal transmitted from the base station (222). As a result, if the paging signal cannot be detected, the wireless information of the terminal is collected again (220). When the paging signal is detected, the paging signal is received (223), the wireless method ID included in the paging signal is analyzed, and the wireless method for the next communication on the terminal side is determined (224). .

  Thereafter, it is determined whether or not the determined wireless method information designates wireless method 1 (225). If the ID information of the wireless system 1 is designated, the wireless system 1 is activated (226), and communication is started (227). On the other hand, if the wireless method 1 is not designated, it is determined whether or not the wireless method 2 ID information is designated (228). If the wireless method 2 is designated, the wireless method 2 is activated (229) and communication is started (230). On the other hand, if the wireless method 2 is not designated, the wireless method 3 is activated (231) and communication is started (232).

  As described above, in the second embodiment of the present invention, information on a radio system desired to be used and information on radio systems that can actually be used are collected on the terminal side and transmitted to the base station side. The base station side sets the priority of the next wireless communication method, and determines the next wireless communication method based on information from the base station side and terminal side information. The determined wireless method information to be communicated is transmitted from the base station side to the terminal side by wireless method 1 paging. The terminal side switches the radio system based on the information received from the base station side. As a result, the disconnection of the communication due to the fluctuation of the radio wave condition can be prevented, and the switching of the radio system according to the radio condition can be realized.

The following are typical examples of aspects of the present invention other than those described in the claims.
(1) A wireless communication system comprising a base station that accommodates a plurality of wireless systems, and a terminal that communicates with the base station by the plurality of wireless systems, wherein the base station A wireless communication system, wherein priority is determined, and information on the set priority is included in a paging signal of one of the plurality of wireless systems and transmitted to the terminal.
(2) The wireless communication system includes a monitoring node connected to the base station, and the base station controls an access point of each wireless system, a gateway that terminates each wireless system, and a control that controls each gateway. The monitoring node collects information on the state of each wireless system, the control node collects information on the state of each wireless system collected by the monitoring node, information on the wireless system usable by the terminal, The wireless communication system according to (1), wherein the priority of a wireless system with which the terminal communicates in the future is determined based on information on a wireless system that the terminal desires to use.
(3) The monitoring node obtains at least one information of RSSI, packet loss, transmission speed of each terminal, number of terminals connected to each access point, and processing load of each access point, The information acquired from each wireless system at different acquisition timings is converted into a comparable format, and the priority of the wireless system with which the terminal will communicate in the future is determined in consideration of the position and moving direction of the terminal. The wireless communication system according to (2).
(4) The control node selects a radio system that transmits the determined priority based on the information acquired by the monitoring node and the information acquired from the terminal, and transmits a paging signal including the priority. The wireless communication system according to (2), wherein the gateway is instructed to transmit from an access point.
(5) The base station accommodates a first wireless system having a wide communication area and a second wireless system having a communication area smaller than that of the first wireless system, and the control node includes the first wireless system. When usable, the priority information of the wireless system to be communicated in the future is transmitted by the paging signal of the first wireless system, and when the first wireless system is not usable, the second wireless system is transmitted. The wireless communication system according to (4), wherein control is performed so that priority information of a wireless system to be communicated in the future is transmitted by the paging signal.
(6) The terminal includes a plurality of transmission units and reception units corresponding to a plurality of radio systems, and a control unit that controls the transmission unit and the reception unit, and the control unit is transmitted from the base station. A wireless system to communicate with is determined based on priority information included in the paging signal, information on the collected wireless systems that can be used, and information on wireless systems that the terminal desires to use. The wireless communication system according to (1).
(7) The control unit acquires usable wireless system information using a beacon signal of each wireless system, and collects the usable wireless system information and the terminal desires to use the wireless system. The wireless communication system according to (6), wherein information on a wireless system to be stored is stored.
(8) The radio communication system according to (6), wherein the control unit activates a reception unit of the radio system determined to communicate.
(9) The wireless communication system according to (6), wherein the control unit puts the reception unit of the wireless system determined not to communicate into a sleep state.
(10) The reception unit of the wireless system set in the sleep state changes a time interval for receiving a paging signal according to a method of the wireless system in which the reception unit is in an activated state ( 9) The wireless communication system according to 9).
(11) The wireless communication system according to (9), wherein the reception unit of the wireless system set in the sleep state does not start even when a paging signal is detected.
(12) A wireless communication terminal that communicates with a base station accommodating a plurality of wireless systems by the plurality of wireless systems, a plurality of transmitting units and receiving units corresponding to the plurality of wireless systems, and the transmitting unit and A wireless communication system including a control unit that controls the reception unit, wherein the reception unit receives a paging signal transmitted from the base station, and the control unit is determined by the base station and the terminal communicates in the future The priority information of the received wireless system information is collected from the received paging signal, the extracted priority information, the collected usable wireless system information, and A wireless communication terminal that determines a wireless system to communicate based on information of a wireless system that the terminal desires to use.
(13) The control unit obtains information on a usable wireless system from the beacon signal of each wireless system, collects information on the usable wireless system, and the wireless that the terminal desires to use. The wireless communication terminal according to (12), which stores system information.
(14) The wireless communication terminal according to (12), wherein the control unit activates a reception unit of a wireless system determined to communicate.
(15) The wireless communication terminal according to (12), wherein the control unit puts the reception unit of the wireless system determined not to perform communication into a sleep state.
(16) The reception unit of the wireless system set in the sleep state changes a time interval for receiving a paging signal according to a method of the wireless system in which the reception unit is in an activated state ( The wireless communication terminal according to 15).
(17) The wireless communication terminal according to (15), wherein the reception unit of the wireless system set in the sleep state does not start even when a paging signal is detected.

30 Paging signals 31, 701 Cognitive terminals 32, 34, 36 Receiving units 33, 35, 37 Transmitting unit 38 Control unit 39 Power control unit 40 Information processing unit 701 Cognitive terminal 102 EVDO base station 103 Wireless LAN access point 104 WiMAX base station 105 PDSN
106 PDIF
107 ASN-GW
705 Control node 702 Cognitive base station 704 Monitoring node 112 Network 108 HA
703 Common Certificate Authority 800 CN
720 Base stations 721 and 750 Paging signal 722 transmitted from the base station 723 WiMAX communication area 723 EVDO communication area 724 and 725 Communication terminal 726 Information collected on the terminal side 850 Wireless system 1 communication processing unit (base station side)
851 Wireless system 2 communication processing unit (base station side)
852 Wireless communication unit 3 (base station side)
950 Wireless system 1 communication processing unit (terminal side)
951 Wireless system 2 communication processing unit (terminal side)
952 Communication processing unit of wireless system 3 (terminal side)
900 Paging signal 901-903 Beacon signal 904-906 Terminal transmission / reception unit 907 Control unit 908 Power control unit 909 Information processing unit

Claims (6)

A wireless communication system comprising a base station that accommodates a plurality of wireless systems, and a terminal that communicates with the base station by the plurality of wireless systems,
The wireless communication system includes a monitoring node connected to the base station,
The base station includes an access point of each wireless system, a gateway that terminates each wireless system, and a control node that controls each gateway,
The monitoring node collects information indicating a state of each wireless system;
The control node indicates the priority order of the wireless system used by the terminal among the plurality of wireless systems based on the information indicating the state of each wireless system collected by the monitoring node. Determine the priority of the radio system,
The base station
Receiving the priority of the wireless system with which the terminal will communicate from the control node;
Receiving from the terminal information indicating which radio system the terminal can use and information indicating the radio system desired by the terminal;
Based on the priority of the wireless system with which the received terminal will communicate in the future, information indicating which wireless system the received terminal can use, and information indicating the wireless system desired by the terminal Decides the wireless system to communicate in the future,
A paging signal of a wireless system having a wide service area among the plurality of wireless systems is transmitted to the terminal including information indicating a wireless system with which the determined terminal will communicate in the future,
The terminal includes a plurality of transmission units and reception units corresponding to a plurality of wireless systems, and a control unit that controls the transmission unit and the reception unit,
The controller is
Determining the wireless system to communicate based on information indicating the wireless system with which the determined terminal communicates in the future included in the paging signal transmitted from the base station;
Start the communication with the communication partner by activating the receiver corresponding to the wireless system determined to communicate,
A wireless communication system, wherein the receiving unit corresponding to the wireless system determined not to communicate is put in a sleep state.   The receiving unit set in the sleep state changes a time interval for receiving a paging signal according to a method of a wireless system corresponding to the receiving unit in an activated state. The wireless communication system described.   The wireless communication system according to claim 1, wherein the receiving unit set in the sleep state does not start even when a paging signal is detected. A wireless communication terminal that communicates with a base station that accommodates a plurality of wireless systems by the plurality of wireless systems,
A plurality of transmission units and reception units corresponding to the plurality of wireless systems, and a control unit for controlling the transmission unit and the reception unit,
The transmitting unit transmits information indicating which radio system the terminal can use and information indicating a radio system desired by the terminal to the base station,
The receiving unit is transmitted from the base station, receives a paging signal of a wireless system having a wide service area among the plurality of wireless systems,
The paging signal indicates the priority of the wireless system used by the terminal among the plurality of wireless systems, the priority of the wireless system with which the terminal will communicate in the future, and which wireless system the received terminal can use Information indicating whether the terminal is to be communicated in the future, which is determined based on information indicating whether the terminal is desired and information indicating the wireless system desired by the terminal,
The controller is
Extracting information indicating the wireless system with which the determined terminal will communicate from the received paging signal,
Switching the wireless system based on information indicating the wireless system with which the extracted terminal will communicate in the future,
Start communication with a communication partner by activating the receiving unit corresponding to the wireless system determined to communicate,
A wireless communication terminal, wherein the receiving unit corresponding to the wireless system determined not to communicate is put into a sleep state.   The receiving unit set in the sleep state changes a time interval for receiving a paging signal according to a method of a wireless system corresponding to the receiving unit in an activated state. The wireless communication terminal described.   The wireless communication terminal according to claim 4, wherein the receiving unit set in the sleep state does not start even when a paging signal is detected.

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