Private radio communication system

[Detailed Description of the Invention]

[Table of contents] Outline Field of the Invention PRIOR ART The problem which an invention tends to solve The means for solving a problem OPERATION EXAMPLE EFFECT OF THE INVENTION [lR important point] The present invention relates to the low-speed data transmission system of the minute electric power radio by which data communications are performed between a host office and a mobile station via either of a plurality of base stations which form the multi-zone service area for mobile stations, It aims at providing the system excellent in the resistance to environment, For this reason, mobile stations call a base station all at once, line quality chooses most the base station which becomes high from the signal to noise ratio of each base station transmitted signal which answered this, a mobile station requires position registration from that base station, and registration of this position is performed in a Ho ON A office.

[Industrial Application] The present invention relates to the yard radio communications system with which data communications are performed between a mobile station and a host office via a plurality of base stations which form the service area of a multi-zone. In this kind of system, what is called a Local Area Network is formed, and communication is performed via a radio circuit between a base station and a mobile station.

[Description of the Prior Art] This kind of systems are a host office and a plurality of base stations. Since it comprises a mobile station and comparatively large area is covered, the area is divided into a plurality of zones, and a base station is established in each zone. If a mobile station moves the inside of the above-mentioned area to other zones, the mobile station and a Hoss 1~office will communicate via the base station of the zone of a movement place. When communicating between host offices via the base station of the zone here after a mobile station moves to a new zone, A mobile station user checks the zone where a mobile station belongs, and its base station, sets up the ID number for zone discernment, and a base station ID number by switch operation of a mobile station, and makes a Calling demand transmit to the base station shown by an ID number, and, thereby, a mobile station position is registered into a base station. However, in the former, since registration of the mobile station position was performed only according to a mobile station user's directions, the low radio circuit of quality was chosen depending on the case, and there was a problem of it becoming impossible to perform good communication. Since the position of the mobile station was not registered in a host office, a host office could not call a mobile station actively, therefore there was also a problem that restriction arose in use of a system. Since complicated operation of the mobile station was required of the user common for position registration, there was a problem that the operativity of a mobile station was low. It is made in view of the above-mentioned conventional subject, and the present invention is the object, It is in providing the system chooses the base station where the high line quality of quality is always acquired, and can perform good wireless communications, and the call of of the active mobile station by a host office is attained, and it becomes possible to improve the operativity which the availability of a system increases and position registration of a mobile station moreover takes.

[Means for Solving the Problem] To achieve the above objects, a system concerning the present invention is constituted as shown in Drawing 1. Between host office 1 of the figure, and mobile station 2, data communications are performed, a service area of a multi-zone to a mobile station is formed in a plurality of base stations 3, and relay of the data communications is performed via one of base stations 3. And by means 2a of mobile station 2, base stations 3 are called all at once. By means 2b, a reply signal of base station 3 to a simultaneous call is received. By means 2c, base station 3 where the Response @ signal to noise ratio is the highest is chosen common. And a position registration demand is transmitted to a selected base station from means 2d. By means 3a of base station 3, a reply signal over a simultaneous call occurs and a position registration demand is received by means 3b. And according to a position registration demand, position registration of mobile station 2 is charged by means 3c to host office 1.

[operation Co The detailed description of the invention of Drawing 2 is carried out, and it is first given by the user in directions of position registration to a mobile station (Pl). Mobile stations are all the base stations (in the figure, a simultaneous call signal is sent out to three game> (P2).). Each base stations are called all at once by this, and a reply signal is given from each base station to a mobile station (P3). In a mobile station, a base station where the signal to noise ratio of a reply signal is the highest is chosen, and a position registration demand is transmitted to the base station (P4). In a selected base station, if a position registration demand is received, position record of a mobile station will be performed and the completion of registration will be transmitted to the mobile station (P5). Thereby in a mobile station, a notice of completion of registration is performed to a mobile station user (P6). In a base station, after a position application for registration is advanced to a host office (P7) and position record is carried out in a host office, a notice of the completion of position record is given to a base station from a host office (P8).

[Example] Hereinafter, the suitable example of the system applied to the present invention based on a drawing is described. Below, the reply signal with which a WIB signal and a base station transmit the simultaneous call signal which a mobile station transmits will be called an IAB signal. Drawing 3 is A object composition explanatory view of an example, and this system is formed by host office 1. base station 3-1 *3-2.3-3. mobile station 2-1.2-2.2-3*2-4.2-5.2-6 which comprised a computer. And in order to secure a large service area, the area is divided into a plurality of zones, and base station 3-1.3-2.3-3 is established in each zone. And in mobile station 2-1, in the zone of base station 3-1, mobile station 2-2*2-3.2-5 is in the zone of base station 3-2, In the zone of base station 3-3, mobile station 2-4.2-5.2-6 is moving respectively, When mobile station 2 (2-1, 2-2, 2-3, or 2-4*2-5.2-6) moves to other zones, communication is performed between host offices 1 via base station 3 (3-1, 3-2, or 3-3) of the zone. In this kind of system, data transfer is performed at a low speed. Drawing 4 is a block diagram explaining the composition of mobile station 2, mobile station 2 comprises terminal interface 41. memory 42. transceiver wireless section 43. control part 44. timer 45. signal to noise ratio measurement part 46, and input/output device 47 is connected to terminal interface 41. Drawing 5 is a block diagram explaining the composition of base station 3, base station 3 comprises host interface 51 and memory 52. transceiver wireless section 53. control part 54 * timer 55, and host office 1 is connected to host interface 51. Wireless communications are performed between transceiver wireless section 43 of mobile station 2, and transceiver wireless section 53 of base station 3. Individual identification signal ID by which Drawing 6 is a Off t-mat explanatory view of wireless-communications data, and wireless-communications data is used for a synchronization etc., It is formed by the data of command C for identifying various control signals (the code corresponding to the WIB signal of mobile station transmission or the IAB signal of base station transmission is set), self-office identification number SID, partner office identification number DID, and channel designator CHN. When a certain mobile station 2 transmits a WIB signal, it becomes all the addressing to a base station by setting a circular code as data DID. In this system, one exclusive control channel and a plurality of data channels are provided, and the channel designator of a use data channel is set as data of data channel CHN. The flow chart Drawing 7 indicates the processing procedure of mobile station 2 to be, and Drawing 8 are flow charts which show the processing procedure of base station 3, and it explains the operation of this example below using them. If mobile station 2 moves to other zones, directions of a registration demand will be given to control part 44 via terminal interface 41 by operation of input/output device 47 by a user. The WIB signal frame of a registration demand in YES and memory 42 is generated by control part 44 at profit step 7-1 to which the input check is performed (Step 7-2). And the check of channel condition of use is directed from control part 44 to transceiver wireless section 43, the carrier sense of an exclusive control channel is performed by this in transceiver wireless section 43, and when it is empty, the career sense of a data channel is also performed (Step 7-3). If an empty data channel is checked in that case (a channel designator is set to the CHN field corresponding with the WIB signal on step 7-4L memory 42 by control part 44.) A channel does not serve as empty, but when it is When G, a career sense is again performed after progress of random time. If a setup (Step 7-5) of a channel designator is performed, the transmitting command of a W1B signal frame will be given to transceiver wireless section 43 from control part 44 (timer 45 for step 7-6> and a response waiting time setup is started by control part 44 (Step 7-7).). On the other hand, in transceiver wireless section 53 of base station 3, data reception of the control channel is performed and the frame of an IAB signal is generated by YES and control part 54 within memory 52 at profit step 8-1 from which reception of a WIB signal is checked in control part 54 (Step 8-2). Next, timer 55 for the waiting for random time is started (Step 8-3L it is avoided that transmission is delayed by random time by this, and an IAB signal frame is simultaneously sent out from a plurality of base stations 3 as a result, those collisions are prevented, and, for this reason, disappearance of a frame is prevented.). Then, when timer 55 times out (being Step 8-4 YES), The channel set as the CHN field of a received WIB signal is set up as a data channel for transmission (Step 8-5), and the transmitting command of an IAB signal frame is given to transceiver wireless section 53 from control part 54 (Step 8-6). In mobile station 2, the career sense of the data channel is started with timer starting (Step 7-7), A check of reception of an IAB signal frame will judge whether the signal to noise ratio of the received signal measured in signal to noise ratio measurement part 46 is beyond default value in control part 44 (step 7-13>.). (it is YES at Step 7-8) When this signal to noise ratio is beyond default value (it is YES at Step 7-13), that signal to noise ratio and ID number of base station 3 are recorded on memory 42, Only when the signal to noise ratio and the base station ID number which end at the time of subsequent reception are high (it is YES at Step 7-14), the signal to noise ratio and the base station ID number which were memorized by memory 42 by then are rewritten by the new thing (Step 7-15). If the above operation is repeated until timer 45 times out, and timer 45 times out (being Step 7-9 YES), It is judged whether the ID number of base station 3 is memorized by memory 42 (step 7-10>, when not memorizing (the notice of registration failure is performed to No> from input/output device 47 to a user at Step 7-10 (step 7-16>.))). When the ID number of base station 3 is memorized by memory 42 at the time of deadline of timer 45 (it is YES at Step 7-9) (it is YES at Step 7-10), Transmission of a registration demand is performed to the base station 3 (a user is notified of completion of step 7-11> and position registration by input/output device 47 (step 7-12>.)). In base station 3 where the registration demand was given from this mobile station 2, If the reception is checked (Step 8-7), the contents of the table for mobile station position registration prepared for memory 52 will be updated, and the registration will be performed (an application for registration is sent out to host office 1 via step 8-8> and interface 51 (Step 8-9).). In host office 1, if the master table for mobile station position registration prepared for the inside is updated (mobile station registration) and response reception of the completion of registration is Sure 8* Carried out in base station 3 (it is YES at Step 8-10), processing of Drawing 8 will be ended. Since base station 3 where line quality becomes the highest is chosen by those reply signals SN according to this example as explained above, after position registration, it becomes possible to communicate in the good state between host offices 1 via the base station 3. Since position registration is performed automatically according to this example, it becomes possible to improve the operativity of mobile station 2, and also when an obstacle enters to a transmitting way and the line quality deteriorates, re-registration of a position can be performed easily. Since according to this example position registration is charged from base station 2 in host office 1 and the registration is performed, host office 1 is enabled to call mobile station 2 actively, therefore required information is given from host office 1 to mobile station 2, and this can be used for various kinds of uses. It is also preferred to constitute mobile station 2 so that position registration of mobile station 2 may be performed automatically, when the transmitting state of a mobile station and a base station gets worse.

[Effect 6 of an invention] Since according to this example auto select of the mobile station to which line quality becomes high most is made and position registration of a mobile station is performed in a host office as explained above, good communication is attained, and also-izing of the position registration can be carried out [ easy ] remarkably, and it becomes possible to improve the availability of a system moreover.

[Brief Description of the Drawings]

In the operation explanatory view of an invention, and Drawing 3, the principle explanatory view of an invention and Drawing 2 are [ Drawing 1 ] the whole example composition explanatory views, The flow chart the block diagram Drawing 4 explains the composition of a mobile station to be, the block diagram Drawing 5 explains the composition of a base station to be, and Drawing 6 show the format explanatory view of wireless-communications data, and Drawing 7 indicates the processing procedure of a mobile station to be, and Drawing 8 are flow charts which show the processing procedure of a base station. 1 ... Host office 2 ... Mobile station 3 ... Base station 42 ... Memory 43 ... Transceiver wireless section 44 ... Control part 46 ... Signal to noise ratio measurement part 47 ... Input/output device 52 ... Memory 53 ... Transceiver radio 8eta54 ... Control part Drawing 1