WO2005125105A1 - 無線通信システム - Google Patents
無線通信システム Download PDFInfo
- Publication number
- WO2005125105A1 WO2005125105A1 PCT/JP2004/018478 JP2004018478W WO2005125105A1 WO 2005125105 A1 WO2005125105 A1 WO 2005125105A1 JP 2004018478 W JP2004018478 W JP 2004018478W WO 2005125105 A1 WO2005125105 A1 WO 2005125105A1
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- WIPO (PCT)
- Prior art keywords
- wireless
- communication
- wireless terminal
- wireless communication
- terminal device
- Prior art date
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- 238000004891 communication Methods 0.000 title claims abstract description 317
- 230000004044 response Effects 0.000 claims abstract description 29
- 238000010586 diagram Methods 0.000 description 15
- 230000007704 transition Effects 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000023402 cell communication Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/0015—Arrangements for entertainment or communications, e.g. radio, television
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/16—Interfaces between hierarchically similar devices
- H04W92/18—Interfaces between hierarchically similar devices between terminal devices
Definitions
- the present invention establishes wireless communication between wireless communication terminals in an environment in which a plurality of wireless communication terminals whose use position is fixed, such as a space in an aircraft (hereinafter referred to as an in-flight space), is concentrated.
- Wireless communication system a space in an aircraft
- LANs wireless local area networks
- Ethernet registered trademark
- the wireless terminal apparatuses communicate directly with each other without passing through other mediation.
- the other is 'infrastructure mode'.
- the access point device manages the wireless terminal devices in the service area and manages all access.
- the access point device also plays a role as a bridge that relays inside and outside so that the wireless terminal device in the service area can communicate with the external network.
- the frequency used for wireless communication is called the ISM band (Industry Science Medical Band) 2. 400 GHz power et al. 2. The band of 485 GHz . This frequency band is divided into 13 channels of 5 MHz each. If these medium powers are separated and used, it is possible for wireless terminal devices connected to different networks not to interfere with each other even when adjacent wireless terminal devices perform different wireless communications. Be able to However, since there is a limit in selecting combinations of non-interfering channels, another network identification method is used. In IEEE802.11, ESS (Extended Service Set Identifier) is specified. The ESS—ID is a communication identification code included at the beginning of the packet signal transmitted by the wireless LAN system, and if the two do not match, the packet signal is ignored, so communication is established between wireless terminal devices with different ESS—ID. I can not do it.
- ESS Extended Service Set Identifier
- the wireless LAN system having the above features was initially intended for use in a portable or portable personal computer, a portable wireless terminal device, etc., these days, the complexity of wiring is eliminated. From the purpose, it is also conceivable to use a wireless LAN system to provide network service to a terminal device whose use position is fixed.
- FIG. 1 An example of providing a wireless LAN service to a terminal apparatus whose use position is fixed (hereinafter referred to as a conventional example) is shown in FIG.
- a wireless LAN system is used to deliver information data and video data to wireless terminal devices 202, 206 and 207 installed in each seat in an aircraft.
- Information data and video data are stored in the head end device 201 of the system, and the terminal 202 installed in each seat is a wireless base station device 203 which is an access point device connected to the head end device 201.
- the wireless terminal devices 202, 206, and 207 are densely packed as in this conventional example, the number of wireless terminal devices included in the serviceable area of one access point device becomes extremely large. However, since the processing capacity of the access point apparatus is limited, this results in a decrease in throughput to each wireless terminal apparatus. This is a fatal defect when distributing video data using wireless communication. As a countermeasure against this, it is general to use the concept of a cell used in the field of wireless communication between a cellular phone and a wireless base station device. In order to perform cell communication, the in-flight space is divided into a plurality of areas, and one access point device 203 is assigned to one area 204.
- the access point device and the terminals in the area communicate wirelessly using a predetermined channel or ESS-ID.
- the terminal 207 in the area 205 can access another area 204.
- Establish communication with device 203 Can be prevented.
- the number of wireless terminal devices that each access point device should be in charge becomes clear, and management of communication quality provided to the wireless terminal devices becomes easy.
- Patent Document 1 Japanese Patent Application Publication No. 2001 197571.
- Patent document 2 Japanese patent application publication 2000 224640 gazette.
- Patent document 3 Japanese patent application publication 2004 056333 gazette.
- the wireless terminal system 206 in the area 204 and the wireless terminal apparatus 207 in another area 205 are in a short distance due to the cell in the wireless LAN system according to the conventional example described above. As a result, there is a problem that it can not shift to the ad hoc mode. This problem is explained below using FIG. In the figure, the terminal 301 and the terminal 303 belong to different areas, and the access point apparatus 304 and the access point apparatus 305 are communication targets, respectively.
- the wireless terminal device 303 requests data 302 existing in a storage medium in the wireless terminal device 301.
- the data 302 is first transferred to the access point device 304, and the data received by the access point device is transferred to the access point device 305 via the backbone network of the wireless communication system.
- Sent to The wireless terminal device 303 can obtain desired data by acquiring data from the access point device 305.
- the access point device 304 and the access point device 305 will process a large number of packets.
- packet delivery to the other wireless terminal devices that each access point device 304, 305, etc. is in charge may be delayed, which may lead to a decrease in the quality of service to the entire wireless communication system.
- the wireless terminal device 301 and the wireless terminal device 303 perform ad hoc mode communication using a common channel or ESS-ID to achieve higher throughput than affecting other wireless terminal devices in the same service area. of Data transfer becomes possible.
- the wireless terminal device 301 and the wireless terminal device 303 exist in different cells, and different channels or ESS-IDs are used for communication with their respective access point devices. Therefore, in the wireless LAN system, since the wireless terminal devices of each other are in a state in which the presence of the wireless terminal devices of each other is concealed, it is not possible to find another device and can not shift to the ad hoc mode.
- the two wireless terminal devices acquire a channel and ESS-ID to be used in common, and the wireless terminal device resets communication settings of the wireless LAN system. Means are needed.
- the wireless terminal device 301 and the wireless terminal device 303 are wireless terminal devices present in different cells, and it is not clear whether the physical distance is a short distance in which the ad hoc mode communication is possible. Attempting to switch to ad-hoc mode despite the distance between wireless terminals is too long to find the wireless terminal of the other party, resulting in long-term interruption of communication, which puts stress on the users of wireless terminals. multiply.
- the "mobile wireless device” disclosed in Patent Document 2 is a device that uses location information. there were. Since route selection in this "mobile radio apparatus" is based on a fixed base station communicating with the mobile radio apparatus, a route designed in advance using information on the base station stored in advance in a database is used. This is a selection method and is not suitable for ad hoc network route design without fixed base stations.
- Patent Document 3 designs a route of a wireless communication device without a fixed base station using location information of the wireless communication device, and uses longitudes and latitudes of multiple points. For example, a mobile communication apparatus that efficiently determines the communicable range with a small error is disclosed. Need to use an expensive position detection device such as the Global Positioning System (GPS). was there.
- GPS Global Positioning System
- the object of the present invention is to solve the above problems, and even if the wireless terminal devices are in a short distance, each wireless terminal device reliably enters the ad-hoc mode even if it spans the service area of the access point device. It is to provide a wireless communication system that can be migrated.
- a wireless communication system comprising: a plurality of wireless terminal devices each having a predetermined arrangement position;
- At least one wireless base station device performing wireless communication with the plurality of wireless terminal devices, each wireless base station device is connected via a wired line, and each of the wireless base station devices is connected via any of the wireless base station devices
- a wireless communication system comprising a communication control device for communicating with a wireless terminal device, comprising:
- Storage means for storing a first table on whether or not direct wireless communication can be performed between the wireless terminal devices
- Control means for judging the propriety of wireless communication and transmitting a notification signal including the judgment result to the radio terminal apparatus that has transmitted the request signal via the radio base station apparatus. It is characterized by
- the storage means of the communication control apparatus further stores a second table for currently used communication parameters for each of the wireless terminal devices,
- control means of the communication control apparatus refers to the second table to determine the communication parameter for the requested direct wireless communication, and performs notification including the communication parameter.
- a signal is transmitted to the wireless terminal apparatus that has transmitted the request signal via the wireless base station apparatus.
- the wireless terminal device that has transmitted the request signal is In response to the notification signal, a plurality of communication parameters are used to transmit a response signal request to the remote terminal directly in wireless communication, and the remote terminal power is transmitted in response to the response signal request. It is characterized in that communication parameters with the counterpart terminal apparatus are determined based on the response signal.
- a wireless communication system comprising: a plurality of wireless terminal devices each having a predetermined arrangement position;
- At least one wireless base station device performing wireless communication with the plurality of wireless terminal devices, each wireless base station device is connected via a wired line, and each of the wireless base station devices is connected via any of the wireless base station devices
- a wireless communication system comprising a communication control device for communicating with a wireless terminal device, comprising:
- Each of the wireless terminal devices is a first storage unit that stores a first table on whether or not direct wireless communication can be performed between the wireless terminal devices;
- communication control means determines whether or not direct wireless communication with the other wireless terminal device is possible by referring to the first table. It is characterized by having.
- the communication control means of each of the above-mentioned wireless terminal devices requests a request signal of direct wireless communication with the other wireless terminal device.
- the communication control device transmits the communication control device to the communication control device via the wireless base station device, and the communication control device stores a second table of communication parameters currently in use for each of the wireless terminal devices. Storage means,
- the communication control means of each of the above-mentioned wireless terminal devices when the above-mentioned direct wireless communication is possible, the other party terminal of direct wireless communication using a plurality of communication parameters. Send a response signal request to the device, and It is characterized in that a communication parameter with the other party terminal device is determined based on the response signal transmitted in response to the other party terminal device power.
- the communication parameter is a channel, a communication identifier, or a radio frequency.
- each of the wireless terminal devices is characterized by a device identifier including an IP address, a terminal number, or a coordinate expression of a position.
- the request signal includes the device identifier.
- the wireless communication system of the present invention it is possible to shift to the wireless communication of the ad hoc mode even between wireless terminal apparatuses having different communication parameters such as the channel used in the infrastructure mode and the ESS-ID.
- the in-flight space can be divided into a plurality of service areas using different channels or communication parameters such as ESS-ID to ensure communication quality, and direct wireless communication between wireless terminal devices By using this mode, no load is placed on the radio base station and communication control equipment.
- the communication control device manages the communication states of all the wireless terminal devices using a table, so that a channel or communication parameter such as ESS-ID is optimal for use between the wireless terminal devices for ad hoc mode communication. Can be assigned to the wireless terminal device pair, and the quality of wireless communication in the ad hoc mode can be easily ensured to a predetermined value or more.
- FIG. 1 is a block diagram showing a configuration of a wireless LAN system according to an embodiment of the present invention.
- FIG. 2 A block diagram showing a configuration of the communication system controller 10 of FIG.
- FIG. 3 is a block diagram showing a configuration of a radio base station apparatus 30 of FIG.
- FIG. 4 is a block diagram showing the configuration of the wireless communication terminal device 40 of FIG.
- FIG. 5 is a view showing an example of an ad hoc wireless communication permission table 6a stored in the hard disk memory 6 of FIG. 2;
- FIG. 6 is a view showing an example of a communication state table 6b stored in the hard disk memory 6 of FIG. 2; 7] A sequence diagram showing a first operation example of the wireless communication system of FIG. 1. [FIG.
- FIG. 8 A sequence diagram showing a second operation example of the wireless communication system of FIG.
- FIG. 9 is a block diagram showing a configuration of a wireless LAN system according to a first conventional example.
- FIG. 10 is a block diagram for explaining problems in the wireless LAN system of FIG. 9; Explanation of sign
- FIG. 1 is a block diagram showing the configuration of a wireless LAN system according to an embodiment of the present invention.
- wireless terminal devices 40-1 and 40-2 (hereinafter collectively referred to as 40) are attached for each seat of a passenger whose arrangement position has been previously determined. It is done.
- the communication system controller 10 is a control device that controls wireless communication of the entire wireless LAN system, and also provides a service data memory, which is a hard disk memory in the own device, to each wireless terminal device 40. 8 in response to the distribution request signal from each of the wireless terminal devices 40, the various data stored in the wireless base station device 30-1 which is an access point device connected to the wired LAN 60. , 30-2 (hereinafter collectively referred to by the reference numeral 30) to distribute to each wireless terminal device 40.
- In-flight space 50 is divided into cells 51 and 52 in a plurality of service areas, and adjacent cells 51 and 52 use different wireless LAN channels or ESS-IDs for each wireless base.
- Station apparatuses 30-1 and 30-2 limit the number of wireless terminal apparatuses 40 in charge.
- the IP address of each wireless terminal device 40 is assigned so that the IP address power can also uniquely determine the terminal number of the wireless terminal device (hereinafter referred to as a terminal number).
- the communication system controller 10 includes a service data memory 8 which is a hard disk memory for storing various data to be distributed to each wireless terminal device 40 in advance.
- each wireless terminal device 40 performs wireless communication via a wireless base station device 30 which is an access point device;
- Control device for controlling the wireless communication in the hard disk memory 6
- an ad hoc wireless communication permission table 6a storing data indicating permission or non-permission of ad hoc wireless communication between wireless terminal devices 40;
- a communication state table 6b for storing data indicating the usage ID (usage identifier) for each wireless terminal 40 in the ad hoc mode
- FIG. 2 is a block diagram showing a configuration of the communication system controller 10 of FIG.
- the communication system controller 10 includes a main control unit 1, a display unit 2, an operation unit 3, a ROM 4, a RAM 5, a hard disk memory 6, a communication interface 7, and a service data memory 8. And is configured.
- the main control unit 1 is constituted by a CPU, and is connected to other hardware units 2 to 8 via a bus 9 to control them and control the operation of the communication system controller 10.
- the display unit 2 is, for example, a display device such as a liquid crystal display (LCD) or a CRT display, and displays an operation state of the communication system controller 10 or displays input data using the operation unit 3. .
- the operation unit 3 includes a keyboard and a mouse including various keys necessary to operate the communication system controller 10.
- the ROM 4 is necessary for the operation of the communication system controller 10, and the main control unit 1 Pre-store various software programs to be executed.
- the RAM 5 is constituted by an SRAM, a flash memory or the like, is used as a working area of the main control unit 1 and stores temporary data generated when the program is executed.
- the hard disk memory 6 stores an application program executed by the main control unit 1 and data necessary for executing the same, and also stores an ad hoc wireless communication permission table 6a and a communication state table 6b.
- the communication interface 7 is connected to each wireless base station apparatus 30 via the LAN 60, performs predetermined interface processing including signal conversion and protocol conversion on the signal from the main control unit 1, and performs predetermined processing.
- each wireless base station apparatus 30 While transmitting signals and data to each wireless base station apparatus 30 via the LAN 60, it receives signals and data received from each wireless base station apparatus 30 via the LAN 60, and includes signal conversion and protocol conversion. Execute predetermined interface processing and output to main control unit 1. Furthermore, the service data memory 8 stores various data such as information data and video data to be distributed to the user of each wireless terminal device 40.
- FIG. 3 is a block diagram showing a configuration of the radio base station apparatus 30 of FIG.
- the wireless base station device 30 controls the operation of the wireless base station device 30 by controlling the communication interface 32 and the wireless communication device circuit 33, and the communication system controller 10 via the LAN 60.
- FIG. 4 is a block diagram showing a configuration of the wireless communication terminal device 40 of FIG.
- a wireless communication control device 40 is, for example, a service terminal device attached to each seat of an aircraft, and includes a main control unit 41, a display unit 42, an operation unit 43, and a ROM 44. It comprises an RAM 45, a hard disk memory 46, and a PC card interface 47.
- the PC card interface 47 is mounted with a wireless LAN card 49 which is a PC card that accesses the wireless base station device 30 via a wireless LAN and performs wireless communication via the antenna 40A.
- the main control unit 41 is constituted by a CPU, and is connected to the other hardware units 42 to 47 via the bus 48, and controls them to control the operation of the wireless terminal device 40.
- the display unit 42 is, for example, a liquid crystal display (LCD) or the like. It is a display device, and displays the operation state of the wireless terminal device 40 or displays the input data using the operation unit 43.
- the operation unit 43 includes a keyboard and a mouse including various keys necessary to operate the wireless terminal device 40.
- the ROM 44 stores, in advance, various software programs which are necessary for the operation of the wireless terminal device 40 and which are executed by the main control unit 1.
- the RAM 45 is configured by an SRAM, a flash memory or the like, is used as a working area of the main control unit 41, and stores temporary data generated when the program is executed.
- the hard disk memory 46 stores an application program executed by the main control unit 41 and data necessary for executing the application program.
- the PC card interface 47 performs interface processing with the wireless LAN card 49 to transmit predetermined signals and data to the wireless base station devices 30 via the wireless LAN, while the wireless base station devices 30 to 30 via the LAN 60.
- the received signal is received, subjected to predetermined interface processing including signal conversion and protocol conversion, and output to the main control unit 41.
- Communication system controller 10 is a combination of any two wireless terminal devices 40 in in-flight space 50, and is in a positional relationship where they can be used for ad hoc wireless communication?
- the ad-hoc wireless communication permission table 6a as to whether or not it is stored in the hard disk memory 6.
- wireless communication is not possible in the ad hoc mode between the terminal numbers 1 and 5, 1 and 6, 2 and 6, 2 and 5 among the wireless terminal devices 40. In other combinations, it is shown that wireless communication in the ad hoc mode is possible.
- the ad hoc wireless communication permission table 6a is obtained by fixing each wireless terminal device 40 in the in-flight space 50 based on the result of communication quality measured in advance in the in-flight space 50 and the prediction using electromagnetic field simulation. The data of the clerk is stored.
- the communication system controller 10 grasps the value of a channel or ESS-ID used for wireless communication with the wireless base station devices 30-1 and 30-2 in each of the cells 51 and 52, Used for communication form and wireless communication of all wireless terminal devices 40 in the in-flight space 50 Means for grasping the parameters.
- the communication system controller 10 holds the communication state table 6b shown in FIG. 6, and the communication state table 6b is in the ad hoc mode, infrastructure, etc. for all the wireless terminal devices 40. Perform wireless communication using the shift of the chair mode, and if using wireless communication in ad hoc mode or ad hoc mode, record which wireless communication is performed using which ESS-ID or channel. .
- the communication state table 6 b is dynamically rewritten according to the change of the wireless communication state of each wireless terminal device 40.
- FIG. 7 is a sequence diagram showing a first operation example of the wireless communication system of FIG. 1.
- the wireless terminal device 40-1 (the terminal number is assumed to be 2) in the cell 51.
- the operation in the case where a large amount of data communication needs to be performed between wireless terminal devices 40-2 (terminal number is 4) in cell 52 will be described using the sequence diagram shown in FIG. .
- each of the wireless terminal devices 40-1 and 40-2 notifies a communication establishment request signal to the communication system controller 10 (step Sl).
- the communication establishment request signal includes a request signal for transition to the ad hoc mode, and the IP address of the communication partner.
- the communication system controller 10 starts to approve both wireless terminal apparatuses 40-1 and 40-2 for transition to the ad hoc mode (step S2).
- the terminal number of the wireless terminal device Convert to In this operation example, it is recognized that the wireless terminal device 40 which has issued the ad hoc transition request signal is the terminal number 2 and the terminal number 4.
- the communication system controller 10 determines from the ad hoc wireless communication permission table 6a whether or not the ad hoc wireless communication between the two wireless terminal devices 40-1 and 40-2 is possible.
- the ad hoc wireless communication permission table 6a of FIG. 5 wireless communication between the wireless terminal device 40-1 and the wireless terminal device 40-2 is permitted.
- the communication system controller 10 power dual wireless terminal device 40-1 and 40-2
- the channel or ESS- ID to be allocated in the ad-hoc mode by these wireless terminal devices 40-1 and 40-2 is determined with reference to the communication state table 6b. And record it in the communication status table 6b. For example, in the case of determining the use ESS—ID of the terminal number 2 of the wireless terminal device 40-1 and the terminal number 4 of the wireless terminal device 40-2 while the communication state table 6 b is in the state of FIG. .
- the ESS-ID used in infrastructure mode communication and the ESS—ID currently used by the other wireless terminal 40 in the ad hoc mode (in this example, the terminal Delete ID-A) used by Number 1 and Terminal Number 3.
- Select any ESS-ID from the remaining ESS-ID candidates are determined as communication parameters for both wireless terminal devices 40-1 and 40-2, and the selected ESS-ID is stored in the communication status table 6b, and the terminal number 2 of the wireless terminal device 40-1 and Record in the field of terminal number 4 of wireless terminal device 40-2.
- the communication system controller 10 transmits an ad hoc transition permission notification signal including the communication parameter that is the channel or ESS-ID of the wireless LAN determined above to each of the wireless terminal devices 40-1 and 40-2. Then, the wireless LAN communication mode of both the wireless terminal devices 40-1 and 40-2 is shifted to the ad hoc mode (step S3).
- the wireless terminal device 40-1 and the wireless terminal device 40-2 use the wireless LAN channel or ESS-ID, which is a communication parameter notified by the ad hoc transition permission notification signal, in the ad hoc mode.
- Establish a wireless communication with the other party (step S4).
- a timeout value T1 is set for the wireless terminal devices 40-1 and 40-2, and wireless communication with the other party can not be established even after time T1 has passed since the reception of the ad-hoc transition permission notification signal.
- the system automatically returns to the infrastructure mode using the channel before the ad hoc mode transition or the ESS-ID, and each wireless terminal device 40-1 and 40-2 wirelessly communicates with the communication system controller 10. Notifies that the establishment of has failed.
- step S5 When wireless communication in the ad hoc mode is completed, both wireless terminal devices 40-1 and 40-2 use the channel or ESS-ID prior to transition to the ad hoc mode.
- step S6 an ad hoc end notification signal is transmitted to the communication system controller 10 (step S6).
- the communication system controller 10 rewrites the fields related to both wireless terminal devices 40-1 and 40-2 in the communication status table 6b, and both wireless terminal devices 40-1 and 40-2 are in infrastructure mode.
- Communication status table 6b is updated by recording and recording (step S7).
- FIG. 8 is a sequence diagram showing a second operation example of the wireless communication system of FIG. 1, and the communication system controller 10 does not transmit the wireless communication in the ad hoc mode of both wireless terminal devices 40-1 and 40-2.
- the operation when it is judged that it is possible is shown.
- the operations from step S1 to step S2 are the same as in FIG.
- the communication system controller 10 determines that the wireless communication in the ad hoc mode of both wireless terminal devices 40-1 and 40-2 is not possible, the ad hoc transition non-permission signal is transmitted to each wireless terminal device 40-1 and 40.
- Transmit to -2 step S3A
- both wireless terminal devices 40-1 and 40-2 continue wireless communication in infrastructure mode.
- data communication between the two wireless terminal devices 40-1 and 40-2 is performed via the wireless base station devices 30-1 and 30-2 connected to the LAN 60 in the aircraft and the communication system controller 10.
- step S8 To be performed.
- the wireless communication system it is possible to shift to the wireless communication of the ad hoc mode even between the wireless terminal devices 40 having different channels and ESS-IDs used in the infrastructure mode. Become.
- the in-flight space can be divided into different channels or multiple service areas using ESS-IDs to ensure communication quality, and direct wireless communication (ad hoc mode) between wireless terminal devices 40 can be used.
- no load is placed on the radio base station apparatus 30, the LAN 60, and the communication system controller 10.
- the communication system controller 10 manages the communication states of all the wireless terminal devices 40 using the communication state table 6b, so that the channel or ESS-ID optimal for use between the wireless terminal devices 40 for ad hoc mode communication It is possible to assign to the terminal device pair, and the quality of wireless communication in the ad hoc mode can be easily ensured to a predetermined value or more.
- the communication system controller 10 includes each wireless terminal device 40. Although it is judged whether or not the transition to the ad hoc mode can be made after receiving the ad hoc transition request signal of the force, the present invention is not limited to this and when the wireless terminal device 40 is fixed to the in-flight space 50, FIG.
- the ad hoc wireless communication permission table 6a of 5 is created and stored in each wireless terminal device 40, and based on this, each wireless terminal device 40 wirelessly communicates with the other party of wireless communication by itself in the ad hoc mode. You can judge whether you can do it.
- the wireless terminal device 40 when the wireless terminal device 40 requests direct wireless communication with another wireless terminal device 40, the wireless terminal device 40 refers to the ad hoc wireless communication permission table 6 a and exchanges the wireless terminal device 40 with the other wireless terminal device 40. It is determined whether or not direct wireless communication is possible, and when the above direct wireless communication is possible, a request signal of direct wireless communication with the other wireless terminal device 40 via the wireless base station device 30. In response to the communication system controller 10, in response to this, the communication system controller 10 responds to a request signal for direct wireless communication with another wireless terminal device from each wireless terminal device 40, With reference to the communication state table 6b, the communication parameter for the requested direct wireless communication is determined, and a notification signal including the communication parameter is transmitted to the wireless terminal device 40 that has transmitted the request signal.
- the communication system controller 10 refers to the ad-hoc wireless communication permission table 6a to determine the availability of wireless communication in the ad-hoc mode.
- the communication state of the channel or ESS-ID refers only to the communication state table 6b. Only determine the parameters!
- the IP address power of the wireless terminal device 40 is also assigned, for example, by a DNS (Domain Name Server) table so that the terminal number of the wireless terminal device can be uniquely determined.
- DNS Domain Name Server
- the present invention is not limited to this, and the wireless terminal device 40 or the coordinate representation of the position of the wireless terminal device 40 in the in-flight space 50 may be inserted into the wireless communication transition request signal in the ad hoc mode.
- the terminal device 40 may notify the communication system controller 10 of the terminal number of the wireless terminal device 40. That is, the identification of each wireless terminal device 40 is not limited to the IP address or the terminal number, and may be a coordinate representation of the position of the wireless terminal device 40 (for example, a two-dimensional or three-dimensional coordinate value). .
- the communication system controller 10 is configured to The present invention is not limited to this.
- the present invention is not limited to this, and each wireless terminal for transitioning to the ad hoc mode is notified of communication parameters (channel or ESS-ID) to be used in the ad hoc mode.
- the device 40 While scanning for all possible channels or ESS-IDs in the ad-hoc mode, the device 40 waits for a response signal from the other terminal at each channel or ESS-ID, and within a predetermined time Based on the response signal received from the opposite terminal, the communication parameter such as a channel or ESS-ID to be used subsequently in the wireless communication is determined by the wireless terminal 40 and the ad hoc mode is performed. Wireless communication may be established.
- the function of determining communication parameters can be omitted, and the configuration of the communication system controller 10 can be simplified. Also, at this time, when establishing wireless communication in the ad-hoc mode with the wireless terminal apparatus 40 of the other party by means of scanning of the channel or ESS- ID, each wireless terminal apparatus 40 can maintain a certain communication quality. By adopting only the ID and using it for wireless communication, it is possible to secure the communication quality of wireless communication in the ad hoc mode to a predetermined value or more.
- the present invention is not limited to this, and a radio frequency may be used.
- the present invention is not limited to the wireless LAN system in the in-flight space 50 of the aircraft.
- the present invention is not limited thereto, for example, a computer classroom in a school, an LL classroom, a stadium This is effective because there are no obstacles between each customer's seat and it is easy to receive radio waves, etc.), etc.
- Hot spot service user placement position is determined in advance
- wireless LAN system in company each user's It can be applied to various wireless LAN systems in which the position of the wireless terminal device 40 is predetermined, such as a desk is fixed).
- the wireless communication system of the present invention establishment of wireless communication in the ad hoc mode in an environment in which the wireless terminal devices 40 are densely implemented is achieved, and deterioration of communication quality related to the entire network is prevented. It is useful as a technology that can
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20040822185 EP1760943A1 (en) | 2004-06-17 | 2004-12-10 | Wireless communication system |
US11/628,433 US20110176432A1 (en) | 2004-06-17 | 2004-12-10 | Radio Communication System Including Radio Terminal Apparatuses Each Arranged At Previously Determined Position |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004179722A JP3862717B2 (ja) | 2004-06-17 | 2004-06-17 | 無線通信システム |
JP2004-179722 | 2004-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005125105A1 true WO2005125105A1 (ja) | 2005-12-29 |
Family
ID=35510102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018478 WO2005125105A1 (ja) | 2004-06-17 | 2004-12-10 | 無線通信システム |
Country Status (5)
Country | Link |
---|---|
US (1) | US20110176432A1 (ja) |
EP (1) | EP1760943A1 (ja) |
JP (1) | JP3862717B2 (ja) |
CN (1) | CN100559767C (ja) |
WO (1) | WO2005125105A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4664840B2 (ja) * | 2006-03-15 | 2011-04-06 | パナソニック株式会社 | 無線端末装置 |
JP5369914B2 (ja) * | 2009-06-09 | 2013-12-18 | 富士通株式会社 | 通信制御方法、通信制御装置、通信制御プログラム、および端末装置 |
US20110223953A1 (en) * | 2010-03-15 | 2011-09-15 | Lg Electronics Inc. | Apparatus for direct communication in a wireless system and method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003348103A (ja) * | 2002-05-24 | 2003-12-05 | Canon Inc | 無線通信装置及び無線通信システム並びに無線通信方法 |
JP2004072565A (ja) * | 2002-08-08 | 2004-03-04 | Tdk Corp | 無線lan通信方法、無線lan通信システムおよび当該システムに用いられる無線端末、無線lan通信装置、通信制御プログラム、ならびに当該プログラムを記録した記録媒体 |
JP2004147256A (ja) * | 2002-10-28 | 2004-05-20 | Canon Inc | 中継装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5768531A (en) * | 1995-03-27 | 1998-06-16 | Toshiba America Information Systems | Apparatus and method for using multiple communication paths in a wireless LAN |
US6047178A (en) * | 1997-12-19 | 2000-04-04 | Nortel Networks Corporation | Direct communication wireless radio system |
US6744750B1 (en) * | 1999-09-28 | 2004-06-01 | Siemens Information & Communication Mobile, Llc | Replicating and recombinant networking systems and methods for wireless networks |
JP3792632B2 (ja) * | 2002-10-01 | 2006-07-05 | Necインフロンティア株式会社 | 無線lan通信方式 |
US7545771B2 (en) * | 2003-01-29 | 2009-06-09 | Xocyst Transfer Ag L.L.C. | Independent direct link protocol |
KR20040076979A (ko) * | 2003-02-27 | 2004-09-04 | 삼성전자주식회사 | 무선 lan 및 무선 lan 스테이션들사이에서 다이렉트링크 프로토콜 설정방법 |
KR100586845B1 (ko) * | 2003-06-24 | 2006-06-07 | 삼성전자주식회사 | Dcf 기반의 무선 랜 네트워크상에서 dlp와 멀티-채널을 사용하여 전송 효율을 높이는 방법 및 그 방법을 이용한 무선 네트워크 시스템 |
US7577125B2 (en) * | 2005-07-08 | 2009-08-18 | Microsoft Corporation | Direct wireless client to client communication |
-
2004
- 2004-06-17 JP JP2004179722A patent/JP3862717B2/ja not_active Expired - Lifetime
- 2004-12-10 US US11/628,433 patent/US20110176432A1/en not_active Abandoned
- 2004-12-10 WO PCT/JP2004/018478 patent/WO2005125105A1/ja active Application Filing
- 2004-12-10 CN CNB2004800433430A patent/CN100559767C/zh not_active Expired - Fee Related
- 2004-12-10 EP EP20040822185 patent/EP1760943A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003348103A (ja) * | 2002-05-24 | 2003-12-05 | Canon Inc | 無線通信装置及び無線通信システム並びに無線通信方法 |
JP2004072565A (ja) * | 2002-08-08 | 2004-03-04 | Tdk Corp | 無線lan通信方法、無線lan通信システムおよび当該システムに用いられる無線端末、無線lan通信装置、通信制御プログラム、ならびに当該プログラムを記録した記録媒体 |
JP2004147256A (ja) * | 2002-10-28 | 2004-05-20 | Canon Inc | 中継装置 |
Also Published As
Publication number | Publication date |
---|---|
US20110176432A1 (en) | 2011-07-21 |
JP2006005644A (ja) | 2006-01-05 |
CN1998188A (zh) | 2007-07-11 |
JP3862717B2 (ja) | 2006-12-27 |
EP1760943A1 (en) | 2007-03-07 |
CN100559767C (zh) | 2009-11-11 |
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