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  Wireless transmission systemUSPTO Application #: 20080103685Title: Wireless transmission system Abstract: A wireless transmission device makes it possible to access the internet from a wireless LAN terminal, and notifies the state of wireless connection to a public wireless transmission network to the wireless LAN terminal, thereby alleviating uncertainty and disquiet on the part of the user when connecting to this network. The wireless transmission device detects the external network utilization information and notifies it to the wireless LAN terminal, and thereby the processing power of the wireless transmission device is enhanced, and uncertainty and disquiet on the part of the user when connecting to the public wireless transmission network are alleviated. If the wireless transmission terminal takes advantage of a mobile wireless transmission device for accessing the internet by using the public wireless transmission network, the communication burden which is imposed upon the public wireless transmission network is alleviated, and the internet access environment is enhanced. When a terminal device has made a connection request, an authentication section authenticates the terminal device, based upon authentication information which has been stored in a storage section in advance. And an encoding section executes an encoding procedure based upon a code which has been stored in the storage section in advance. By doing this, leakage of the authentication information is prevented. The wireless LAN terminal registers getting off reservation information and its own specific recognition code in advance. When a vehicle approaches a stopping point, the recognition code is verified and the getting off reservation information is notified to the wireless LAN terminal. By doing this, it is possible for the passenger who owns the wireless LAN terminal to get off at his desired stopping point. (end of abstract) Agent: Hogan & Hartson L.L.P. - Los Angeles, CA, US Inventor: Kugo MORITA USPTO Applicaton #: 20080103685 - Class: 701117000 (USPTO) Related Patent Categories: Data Processing: Vehicles, Navigation, And Relative Location, Vehicle Control, Guidance, Operation, Or Indication, Traffic Analysis Or Control Of Surface Vehicle The Patent Description & Claims data below is from USPTO Patent Application 20080103685. Brief Patent Description - Full Patent Description - Patent Application Claims
PRIORITY CLAIM [0001] Priority is claimed on Japanese Patent Applications Nos. 2003-152685 filed May 29, 2003, 2003-187111 filed Jun. 30, 2003, 2003-356499 filed Oct. 16, 2003, 2003-399451 filed Nov. 28, 2003, and 2004-104292 filed Mar. 31, 2004, the content of which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a wireless transmission system. In particular, the present invention relates to a wireless transmission system, a wireless transmission device, and a wireless transmission terminal with which, when a wireless transmission terminal which is being used by a user and which is connected to a wireless transmission device accesses the internet, the wireless transmission device utilizes the public wireless transmission network. [0004] In particular, the present invention relates to a wireless transmission system and to a moving wireless transmission device with which, when a wireless transmission terminal which is being used by a user and which is connected to a moving wireless transmission device accesses the internet, said moving wireless transmission device utilizes the public wireless transmission network. [0005] In particular, the present invention relates to an authentication method for specifying a device which is the object of communication, and to a wireless transmission device and a wireless terminal device which take advantage of this authentication method. [0006] In particular, the present invention relates to a traffic management system which performs vehicle traffic management by providing information to passengers (hereinafter termed "getting off information") which is related to guiding them for getting off or the like, using a wireless transmission function which has been built into a public transport vehicle such as a bus or a train or the like. [0007] 2. Description of Related Art [0008] In recent years, various types of wireless transmission system such as mobile telephones and wireless LANs (Local Area Networks) and the like have come into widespread use, and their accessibility has greatly increased. For example, a household LAN can be easily set up as a wireless LAN, and it is easy to download electronic mail outside the home by using a mobile telephone, and it has become everyday practice to read home pages upon the internet in this manner. [0009] Furthermore, wireless LAN services within vehicles such as buses or trains in which passengers ride for comparatively long time periods have been considered. With a wireless transmission system for implementing this type of wireless LAN service, a wireless LAN is set up by providing a wireless transmission device for the wireless LAN as a wireless base station within the moving vehicle. Furthermore, as an access method to external networks such as the internet or the like, this wireless transmission device is endowed with a function of connection to a mobile telephone network, which is a public wireless transmission network. By doing this, it is possible to connect to the internet from a terminal such as a wireless LAN terminal or the like which is being employed by the user within the moving vehicle, such as a notebook type personal computer or the like, via the wireless transmission device and the public wireless transmission network. [0010] As this public wireless transmission network, a cellular system or a PHS system or the like may be considered, but in particular, there is a per se known high speed wireless transmission system according to the cdma2000 1xEV-DO standard; for example, refer to Japanese Patent Laying Open Publication 2002-300644. [0011] However there are the following problems with, for example, a wireless LAN which is a wireless transmission system according to the above described prior art. Connection between a wireless transmission device and the public wireless transmission network is performed, according to requirements, when accessing from the wireless LAN terminal to a device upon the exterior, such as a web server upon the internet or the like. Due to this, when for example the wireless LAN terminal makes a request to example a home page, the wireless transmission device first starts a connection to the public wireless transmission network, and, when this connection has been completed, it starts to access the home page which is the objective. However, when connecting from a moving vehicle to the public wireless transmission network, sometimes a long time period is required for establishing this connection, due to reasons such as variability of the wireless propagation environment and the like. In particular, this can become prominent with a public wireless transmission network upon which the PPP (Point to Point Protocol) is used, for example a PHS (Personal Handyphone System), or a network of the so called "cdma2000 1xEV-DO" type (CDMA: Code Division Multiple Access). [0012] Because of this, sometimes it happens that a timeout occurs when accessing a home page with an application (a browser) from the side of the wireless LAN terminal before the connection to the public wireless transmission network has been completed, and in practice, irrespective of whether or not access to the home page is actually possible, a message may be displayed upon the wireless LAN terminal to the effect that access to the home page which is the objective cannot be provided. From the point of view of the user, this means that he cannot know whether connection to the public wireless transmission network is impossible or will take a long time, or whether really it is not possible to access the home page which is the objective, and accordingly a feeling of uncertainty and disquiet is imparted to the user, so that these operational conditions are very bad. Furthermore, on the side of the wireless LAN terminal, there is the problem that the wireless transmission device undesirably accesses the wireless transmission network without any dependence upon whether or not a display is being provided to the effect that a timer of the application has timed out so that access to the home page cannot be established, which is useless. [0013] Furthermore, with a wireless transmission system of the above described prior art type, such as for example a wireless LAN, the problems described below also occur. [0014] When a wireless transmission device within a moving vehicle connects to a public wireless transmission network, it is not possible absolutely to guarantee success in establishing a connection, because of the fact that the state of wireless communication with the public wireless transmission network changes from moment to moment due to changes in the position of the vehicle. Furthermore, with a public wireless transmission network which uses the PPP (Point to Point Protocol), such as for example a PHS (Personal Handyphone System) or a CDMA (Code Division Multiple Access) system of the so called cdma2000 1xEV-DO type, the time which is required for connection changes according to the state of wireless communication and the number of users of the wireless communication system and so on. However, the state of wireless communication with the public wireless transmission network and the number of users of the public wireless transmission network are not known to the users within the moving vehicle. Due to this, although a user may be trying indefatigably to establish an internet connection via the public wireless transmission network, if the wireless transmission device is, for example, out of range of the service of the public wireless transmission network, then the wireless transmission terminal of the user is not able to connect to the internet. Furthermore, even if the wireless transmission terminal of the user is able to establish access to the internet, if the traffic upon the public wireless transmission network is congested, then the wireless transmission device of the user experiences an extremely slow response. [0015] In other words, since from the point of view of the user he does not know the state of wireless communication between the wireless transmission device and the public wireless transmission network or the number of users of the public wireless transmission network, there is the problem that sometimes he does not know the reason why he cannot connect to the internet, or the reason why the response is poor, even though he has established access to the internet. [0016] Furthermore, the provision of a wireless LAN service within a moving vehicle such as a bus or a train in which passengers ride for a comparatively long time period is being considered. With a wireless transmission system for implementing such a wireless LAN service, the wireless. LAN is set up by providing a mobile wireless transmission device for a wireless LAN as a wireless base station within the moving vehicle. Furthermore, as a method for accessing an exterior network such as the internet or the like, such a mobile wireless transmission device is endowed with a function for connection to a mobile telephone network, which is a public wireless transmission network. By doing this, it is possible to connect to the internet via the mobile wireless transmission device and the public wireless transmission network from a terminal for a wireless LAN or the like, such as a notebook type personal computer or the like, which is being used by a user within the moving vehicle. [0017] Although, as such a public wireless transmission network, a cellular system or a PHS system or the like may be considered, in particular, as a high speed wireless transmission system, there is a known type of such system which utilizes the cdma2000 1xEV-DO format. For example, reference may be made to Japanese Patent Laying Open Publication 2002-300644. [0018] However, there are the following problems with the above described prior art type wireless transmission systems. [0019] When establishing a connection to the internet from a mobile wireless transmission device within the moving vehicle upon a request from the wireless LAN terminal, although a mobile telephone network--which is a public wireless transmission network--may be utilized, the communication speed of such a mobile telephone network is insufficient by comparison to that of a wireless LAN or the like, and accordingly it is difficult to provide a comfortable internet access environment. Furthermore, the state of wireless communication with the mobile telephone network may be bad due to the position of the vehicle or the like, and, if a large number of mobile telephone users who are utilizing the same base station outside the moving vehicle are present, then the communication speed becomes even slower. [0020] In recent years, as a next generation high speed wireless transmission format, the cdma2000.1x-EV-DO format (hereinafter termed the EV-DO format) has been developed. This EV-DO format is a format according to the cdma2000 1x format which corresponds to an extended third generation cdmaOne format, and is a format which offers a specially increased speed transmission rate for data communications. Here, "EV" means "evolved", and "DO" means "data only". [0021] With the EV-DO format, the wireless interface structure of the uplink circuit from the wireless transmission terminal to the base station is almost the same as that for the cdma2000 1X format. With regard to the wireless interface structure of the downlink circuit from the base station wire to the less transmission terminal, on the one hand, that for the band which is regulated at 1.23 MHz is identical to that for the cdma2000 1x format, while that for the modulation method or the multiplexed method is greatly different from that for the cdma2000 1x format. With the modulation method, by contrast to QPSK or HPSK which are used in the cdma2000 1x format, with the EV-DO format, QPSK, 8-PSK, or 16QAM are changed over between according to the reception conditions in the downlink circuit in the wireless transmission terminal. As a result, if the reception conditions are good, the error tolerance is low and moreover a high speed transmission rate is used, while, if the reception conditions are bad, although the speed is low, a transmission rate is used for which the error tolerance is high. Continue reading... Full patent description for Wireless transmission system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Wireless transmission system patent application. Patent Applications in related categories: 20080109153 - Gps-generated traffic information - Disclosed herein is a traveler information monitoring and dissemination system. The system disclosed herein provides real time information to a traveler, wherein the real time information may be pre-selected by the traveler. The system ensures consistent and quality data are produced and issued to the traveler. ... 20080109154 - Rating that represents the status along a specified driving route - A rating is calculated that represents the traffic conditions of a specified driving route. A driving route is specified that includes a plurality of different roads. The traffic conditions for each of the different roads of the driving route are obtained. 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