Wireless system

Abstract

This wireless system provides a mechanism that allows for easy resetting of scramble codes at base stations and mobile stations without interrupting operations. [Solution] This wireless system enables communication with the base station 20 when the operation management device 10 transmits updated scramble code information to the base station 20 and generates a two-dimensional code indicating the scramble code information, which is then displayed on the display unit of the connected operation manager computer 11. The base station 20 transmits the updated scramble code information to the mobile station 30. The mobile station 30 reads the two-dimensional code displayed on the display unit of the operation manager computer 11 to obtain the scramble code information.

Description

Technical Field

[0001] The present invention relates to a wireless system, and more particularly to a wireless system that can easily change a scrambling code even when a mobile station is stolen, lost, or the like occurs.

Background Art

[0002] [Conventional Technology] A conventional proprietary wireless system is used in a closed environment within a company. A conventional wireless system is composed of one or more operation management devices, one or more base stations, and a plurality of mobile stations.

[0003] When the mobile station turns on the power of the device, it receives a downlink radio wave from a nearby base station. If the scrambling code included in the radio wave matches the scrambling code stored in a storage unit, for example, a built-in ROM (Read Only Memory), the mobile station is within the base station area, and voice and data communication become possible.

[0004] [Conventional Wireless System: FIG. 7] A conventional wireless system will be described while referring to FIG. 7. FIG. 7 is a schematic configuration diagram of a conventional wireless system. As shown in FIG. 7, a conventional wireless system is composed of an operation management device 1, a base station 2, and a plurality of mobile stations 3.

[0005] In a conventional wireless system, the operation management device 1 manages the operation of the wireless system. The base station 2 sets the scrambling code information stored in a storage unit, for example, a built-in ROM, in a wireless format and transmits a downlink radio wave. If the scrambling code information in the uplink radio wave from the mobile station 3 matches, voice communication or data communication is performed. The mobile station 3 receives a radio wave from the base station 2. If the scrambling code information in the wireless format of the base station wave matches the scrambling code information in the built-in ROM, the mobile station is within the area and communication becomes possible.

[0006] [Conventional base station 2 processing: Figure 8] The processing of a conventional base station 2 will be explained with reference to Figure 8. Figure 8 is a flowchart showing the processing of a conventional base station. As shown in Figure 8, when base station 2 starts processing, it uses the scramble code information stored in its internal ROM to perform a downlink transmission to mobile station 3 (S81).

[0007] Next, base station 2 determines whether or not it has received a mobile station wave from mobile station 3 (S82). If it has not received it (NO), it repeats the determination process S82. If it has received it (YES), it determines whether or not the scramble code information in the mobile station wave matches the scramble code information stored in the built-in ROM (S83).

[0008] If the two scramble code information do not match (NO), base station 2 returns to the determination process S82. If the two scramble code information matches (YES), it enables communication with mobile station 3 (S84), and when communication ends, it returns to the determination process S82.

[0009] [Conventional processing of mobile station 3: Figure 9] The processing of the conventional mobile station 3 will be explained with reference to Figure 9. Figure 9 is a flowchart showing the processing of the conventional mobile station. As shown in Figure 9, when mobile station 3 starts processing, it determines whether or not it has received a base station wave from base station 2 (S91). If it has not received a wave (NO), it repeats the determination process S91. If it has received a wave (YES), it determines whether or not the scramble code information in the base station wave matches the scramble code information stored in the built-in ROM (S92).

[0010] If the two scramble code information does not match (NO), mobile station 3 returns to the determination process S91. If the two scramble code information does match (YES), it becomes within the range of base station 2 and enables communication with base station (S93). After communication ends, it returns to the determination process S91.

[0011] [Related technologies] Furthermore, related prior art includes Japanese Patent Publication No. 2015-185894, "Wireless communication system and wireless communication method" (Patent Document 1), and Japanese Patent Publication No. 2013-093678, "Wireless communication system" (Patent Document 2).

[0012] Patent Document 1 describes a wireless communication system in which a first wireless terminal receives permission / prohibition information for use, forwards it to a second wireless terminal, and the second wireless terminal imposes usage restrictions based on the forwarded information. Patent Document 2 describes a wireless communication system in which a terminal station enters a function restriction state in response to a function restriction request signal from a base station. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] Japanese Patent Publication No. 2015-185894 [Patent Document 2] Japanese Patent Publication No. 2013-093678 [Overview of the project] [Problems that the invention aims to solve]

[0014] However, the conventional wireless systems described above had a problem: if a mobile station was stolen or lost, it could continue to be used as long as it was within range of the base station's radio waves, which meant there was a risk of voice calls being intercepted.

[0015] Furthermore, in conventional wireless systems, if a mobile station was stolen or lost and the scramble code settings of the base station and mobile station needed to be changed to render the mobile station unusable, it was necessary to rewrite the scramble code in the built-in ROM of both the base station and mobile station. This required stopping operations and was a time-consuming and costly process.

[0016] Furthermore, Patent Documents 1 and 2 do not describe a configuration that allows for easy resetting of scramble codes at base stations and mobile stations without interrupting operations.

[0017] This invention has been made in view of the above circumstances, and aims to provide a wireless system that allows for easy resetting of scramble codes at base stations and mobile stations without interrupting operations. [Means for solving the problem]

[0018] The present invention, which solves the problems of the above-mentioned conventional example, is a wireless system having an operation management device, a base station, and a plurality of mobile stations, wherein when a change in the scramble code is set, the operation management device transmits the scramble code information to the base station and generates a two-dimensional code indicating the scramble code information and displays it on a connected display device, the base station receives the updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station, the mobile station reads the two-dimensional code displayed on the display device to obtain the scramble code information and sets it in its internal memory, and when the set scramble code information matches the scramble code information received from the base station, communication with the base station is enabled.

[0019] The present invention is characterized in that, in the above-mentioned wireless system, the operation management device sets validity period information in the scramble code information, generates a two-dimensional code including the validity period information, transmits the scramble code information and validity period information to the base station, the base station stores the scramble code information and validity period information from the operation management device in its internal memory, and invalidates the scramble code when the validity period has elapsed, and the mobile station reads the two-dimensional code and stores the scramble code information and validity period information in its internal memory, and invalidates the scramble code when the validity period has elapsed.

[0020] In the wireless system, the operation management device transmits a two-dimensional code to the administrator terminal, and the administrator terminal displays the received two-dimensional code on the display unit.

[0021] The present invention is a wireless system having an operation management device, a base station, and a plurality of mobile stations. When the change of the scramble code is set in the operation management device, the operation management device transmits the information of the scramble code to the base station and generates an input code including a number corresponding to the information of the scramble code and displays it on a display device to be connected. The base station receives the updated scramble code information from the operation management device, stores it in an internal storage unit, and transmits it to the mobile station. The mobile station stores the scramble code information corresponding to the input code displayed on the display device in a correspondence table. When an input code is input from an input unit, the mobile station acquires the corresponding scramble code information from the correspondence table and sets it in the internal storage unit. When the set scramble code information matches the scramble code information received from the base station, communication with the base station is enabled.

[0022] In the wireless system, the base station and the mobile station store the information on the validity period of the scramble code in each storage unit, and when the validity period elapses, the scramble code is invalidated.

[0023] In the wireless system, the operation management device transmits an input code to the administrator terminal, and the administrator terminal displays the received input code on the display unit.

[0024] In the wireless system, when the mobile station turns off the power, the scramble code information set in the storage unit is deleted.

Effect of the Invention

[0025] According to the present invention, when a change in the scramble code is set in the operation management device, it transmits the scramble code information to the base station and generates a two-dimensional code indicating the scramble code information, which is then displayed on a connected display device. The base station receives the updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station. The mobile station reads the two-dimensional code displayed on the display device to obtain the scramble code information and sets it in its internal memory. When the set scramble code information matches the scramble code information received from the base station, communication with the base station is enabled. This wireless system has the effect of easily updating the scramble code information without interrupting operations.

[0026] According to the present invention, when an operation management device sets a change in the scramble code, it transmits the scramble code information to the base station and generates an input code containing numbers corresponding to the scramble code information, which is then displayed on a connected display device. The base station receives the updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station. The mobile station stores the scramble code information corresponding to the input code displayed on the display device in a correspondence table. When an input code is input from the input unit, it retrieves the corresponding scramble code information from the correspondence table and sets it in its internal memory. When the set scramble code information matches the scramble code information received from the base station, communication with the base station is enabled. This wireless system has the effect of easily updating the scramble code information without interrupting operations. [Brief explanation of the drawing]

[0027] [Figure 1] This is a schematic diagram of the wireless system. [Figure 2] This is a flowchart illustrating the processing steps of the operation management device for this wireless system. [Figure 3] This is a flow diagram showing the processing at the base station of this wireless system. [Figure 4]This flowchart illustrates the processing performed by the mobile station of this wireless system. [Figure 5] This is a flowchart illustrating the processing steps of an operation and management device for another wireless system. [Figure 6] A flowchart illustrating the processing performed by a mobile station in another wireless system. [Figure 7] This is a schematic diagram of a conventional wireless system configuration. [Figure 8] This is a flowchart illustrating the processing performed by a conventional base station. [Figure 9] This is a flowchart illustrating the processing performed by a conventional mobile station. [Modes for carrying out the invention]

[0028] Embodiments of the present invention will be described with reference to the drawings. [Summary of the Embodiment] The wireless system according to an embodiment of the present invention (this wireless system) comprises an operation management device, a base station, and a plurality of mobile stations. When the operation management device sets a change in the scramble code, it transmits the scramble code information to the base station and generates a two-dimensional code indicating the scramble code information, which is then displayed on a connected display device. The base station receives the updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station. The mobile station reads the two-dimensional code displayed on the display device to obtain the scramble code information and sets it in its internal memory. When the set scramble code information matches the scramble code information received from the base station, communication with the base station becomes possible. This allows for easy updating of the scramble code information without interrupting operations in the event of theft or loss of a mobile station.

[0029] Furthermore, another embodiment of the present invention (another wireless system) is a wireless system having an operation management device, a base station, and a plurality of mobile stations, wherein when a change setting for the scramble code is made by the operation management device, it transmits the scramble code information to the base station and displays an input code containing numbers corresponding to the scramble code information on a connected display device, the base station receives the updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station, the mobile station stores the scramble code information corresponding to the input code displayed on the display device in a correspondence table, and when an input code is input from the input unit, it obtains the corresponding scramble code information from the correspondence table and sets it in its internal memory, and when the set scramble code information and the scramble code information received from the base station match, communication with the base station becomes possible, and as a result, in the event of theft or loss of a mobile station, the scramble code information can be easily updated without interrupting operations.

[0030] [This wireless system: Figure 1] Next, we will explain this wireless system with reference to Figure 1. Figure 1 is a schematic diagram of the wireless system. As shown in Figure 1, this wireless system includes an operation management device 10, a base station 20, multiple mobile stations 30, an operation manager computer 11, and an administrator terminal 12. Note that in Figure 1, for the sake of simplicity, there is only one base station 20; however, in reality, there are multiple base stations 20.

[0031] [Operation management device 10] The operation management device 10 is a device for managing the operation of this wireless system and updates the scramble code information. Specifically, when the operation management device 10 updates scrambled code information, it sets the scrambled code information to be updated in its own storage unit, generates a two-dimensional code containing the said scrambled code information, and displays it on the operation manager's computer 11. Here, information about the validity period of the code (validity period information) is added to the scrambled code information to generate a 2D code. The validity period information can be set to any desired period, for example, in days or hours.

[0032] When the 2D code is photographed by the camera of the mobile station 30, the corresponding scrambled code information and validity period information can be obtained. Furthermore, the operation management device 10 transmits scramble code information and validity period information to the base station 20.

[0033] [Base station 20] The base station 20 receives the scrambled code information and validity period information transmitted from the operation management device 10 and sets them in its internal memory (built-in RAM [Random Access Memory]). Furthermore, the base station 20 transmits scramble code information along with the downlink radio waves (base station waves) to the mobile station 30 using a wireless format.

[0034] Furthermore, when the base station 20 detects that the scrambled code information contained in the uplink radio waves (mobile station waves) from the mobile station 30 matches the scrambled code information set in its built-in RAM, it enables communication with the mobile station 30, considering it to be within the base station's coverage area.

[0035] The base station 20 then invalidates the scrambled code information when the validity period of the validity period information stored in its internal RAM has expired. In order to invalidate the information, it is possible to delete the scrambled code information from the internal RAM. The expiration of the validity period is determined by counting down using an internal timer.

[0036] [Mobile station 30] The mobile station 30 photographs and reads the 2D code displayed on the display unit of the operation manager's computer 11, and obtains the scramble code information and validity period information contained in the 2D code.

[0037] The mobile station 30 then sets the acquired scramble code information and validity period information in its internal memory (built-in RAM). When the scramble code information received via the base station wave matches the set scramble code information, it enables communication with base station 20, indicating that it is within the base station's coverage area. Furthermore, the mobile station 30 transmits scramble code information along with the uplink radio waves (mobile station waves) to the base station 20 using a radio format.

[0038] Then, when the validity period of the validity period information stored in the internal RAM of the mobile station 30 expires, it invalidates the scramble code information. In order to invalidate it, it is possible to delete the scramble code information from the internal RAM. The expiration of the validity period is determined by counting down using an internal timer.

[0039] [Administrator's Computer 11] The operations manager's computer 11 is connected to the operations management device 10 and displays the 2D code output from the operations management device 10 on its display unit. The administrator computer 11 corresponds to the display device in the claim.

[0040] Furthermore, the administrator computer 11 connects to the administrator terminal 12 via a wired or wireless network and transmits the 2D code (image data) displayed on the display unit. Furthermore, the functions of the operations administrator computer 11 may be included within the operations management device 10.

[0041] [Administrator terminal 12] The administrator terminal 12 can receive a two-dimensional code transmitted from the operation administrator computer 11, store it in its internal memory, and display it on its display unit. The mobile station 30 needs to go to the location of the operation manager computer 11 and read the 2D code. However, since the 2D code is displayed on the administrator terminal 12, the mobile station 30 only needs to go to the location of the mobile administrator terminal 12 and read the 2D code, which is highly convenient for the owner of the mobile station 30.

[0042] Furthermore, if work is required at the work site beyond the validity period, the operation management device 10 generates a new 2D code (new scrambled code information and validity period information), displays it on the administrator terminal 12, and the mobile station 30 reads it, allowing work to continue.

[0043] [Processing of this wireless system] This section describes the processing performed by each device in this wireless system. [Processing by the operation management device 10: Figure 2] The processing of the operation management device 10 will be explained with reference to Figure 2. Figure 2 is a flowchart showing the processing of the operation management device of this wireless system. As shown in Figure 2, when the operation management device 10 starts the process of changing the scrambled code, it saves the changes to the configuration information (scrambled code information and validity period information) in its internal storage unit (S11).

[0044] Then, the operation management device 10 transmits a request to the base station 20 to change the scramble code information, etc. (S12). Specifically, the scramble code information and validity period information are transmitted to the base station 20. Next, the operation management device 10 converts the scrambled code information and validity period information into a two-dimensional code (S13) and outputs it to the display unit of the connected operation administrator computer 11 (S14). Alternatively, the operation administrator computer 11 may send the above two-dimensional code to the administrator terminal 12 and output it to the display unit of the administrator terminal 12. The scrambled code modification process is performed in the manner described above.

[0045] [Processing at base station 20: Figure 3] The processing at base station 20 will be explained with reference to Figure 3. Figure 3 is a flowchart showing the processing at the base station of this wireless system. As shown in Figure 3, the base station 20 determines whether or not it has received a request from the operation management device 10 to change scramble code information, etc. (S21). If it has received the request (YES), it stores the changed scramble code information, etc. (S22). If it has not received the request (NO), it proceeds to process S23. Then, base station 20 transmits scramble code information to mobile station 30 via downlink radio waves (base station waves) (S23).

[0046] Furthermore, the base station 20 determines whether or not it has received scrambled code information via the uplink radio waves (mobile station waves) from the mobile station 30 (S24). If it has not received it (NO), it returns to process S21. If it has received it (YES), it compares the received scrambled code information with the scrambled code information stored internally (S25). If they match (YES), it enables communication with the mobile station 30 (S26), and returns to process S21 upon termination of communication. If they do not match (NO), it returns to process S21.

[0047] [Processing by mobile station 30: Figure 4] The processing of the mobile station 30 will be explained with reference to Figure 4. Figure 4 is a flowchart showing the processing of the mobile station in this wireless system. As shown in Figure 4, the mobile station 30 reads the 2D code displayed on the display unit of the operation manager computer 11 or the display unit of the administrator terminal 12 with its built-in camera (S31), obtains scramble code information and validity period information from the 2D code, and sets it in its internal storage unit (built-in RAM, etc.) (S32).

[0048] Then, the mobile station 30 sets a timer based on the validity period information (S33), counts down the validity period (S34), and then determines whether the remaining time on the timer has reached zero (S35). If the remaining time has reached zero (YES), it deletes the scramble code information (S36) and terminates the process.

[0049] Next, in the determination process S35, if the remaining time on the timer is not zero (if NO), it is determined whether or not a base station wave from base station 20 has been received (S37). If it has not been received (if NO), the process returns to the determination process S35. If it has been received (if YES), the scramble code information included in the radio format of the base station wave is compared with the scramble code information set in the storage unit to determine whether or not they match (S39). If they do not match (if NO), the process returns to S35. If they do match (if YES), communication with base station 20 is enabled as it is within base station range (S39). When communication ends, the process returns to S35.

[0050] [Another wireless system] Next, I will describe another wireless system. Another wireless system has a similar configuration to this wireless system, but the processing at each device differs. The differences between this wireless system and the other system are explained below.

[0051] [Operation management device 10] The operation management device 10 converts scrambled code information, instead of a two-dimensional code, into an input code containing numbers and displays it on the display unit of the operation manager's computer 11. For example, a four-digit number can be used as the input code.

[0052] The operation management device 10 has a correspondence table (conversion table) between scrambled code information and input codes in its internal storage unit, and uses this conversion table to convert scrambled code information into input codes. The conversion table also stores validity period information corresponding to the scrambled code information.

[0053] The operation management device 10 then obtains the validity period information of the scrambled code information from the conversion table and transmits the scrambled code information and validity period information to the base station 20. Furthermore, the administrator computer 11 sends an input code to the administrator terminal 12, which can then display the input code.

[0054] [Base station 20] Furthermore, the base station 20 receives the scrambled code information and validity period information transmitted from the operation management device 10 and sets them in its internal memory (built-in RAM). Then, base station 20 transmits the scramble code information along with the downlink radio waves of the base station to mobile station 30.

[0055] Furthermore, the base station 20 receives scramble code information from the uplink radio waves of the mobile station 30, and if it matches the scramble code information set in the built-in RAM, it can communicate with the mobile station 30 as being within the base station's coverage area. Furthermore, when the validity period of the stored validity period information expires, the base station 20 invalidates the scramble code information. Specifically, it deletes the scramble code information stored in the built-in RAM. The validity period is managed by a built-in timer.

[0056] [Mobile station 30] The mobile station 30 stores a conversion table (similar to the conversion table stored in the operation management device 10) in its internal memory (built-in ROM). It takes an input code displayed on the display unit of the operation manager computer 11 or the administrator terminal 12 as input from its input unit, converts it into scrambled code information using the conversion table, and sets it in its internal memory (built-in RAM).

[0057] Furthermore, the mobile station 30 obtains the validity period information of the scrambled code information from the conversion table and sets it in its built-in RAM. Then, the mobile station 30 transmits the scramble code information along with the uplink radio waves of the mobile station to the base station 20.

[0058] Furthermore, if work is required at the work site beyond the validity period, the operation management device 10 generates a different input code corresponding to different scrambled code information, displays it on the administrator terminal 12, and when that input code is entered at the mobile station 30, work can be continued using validity period information corresponding to the different scrambled code information based on the conversion table.

[0059] Furthermore, the mobile station 30 receives scramble code information via the downlink radio waves from the base station 20, and if it matches the scramble code information set in its built-in RAM, it enables communication with the base station 20, considering it to be within the base station 20's range. Furthermore, the mobile station 30 invalidates the scrambled code information when the validity period of the stored validity period information has expired. Specifically, it deletes the scrambled code information stored in the built-in RAM. The validity period is managed by a built-in timer.

[0060] [Processing another wireless system] The processing of each device in a different wireless system will be described. [Processing by the operation management device 10: Figure 5] The processing of the operation management device 10 will be explained with reference to Figure 5. Figure 5 is a flowchart showing the processing of an operation management device for another wireless system. As shown in Figure 5, when the operation management device 10 starts the process of changing the scrambled code, it saves the changes to the setting information (scrambled code information and validity period information) in its internal storage (S41).

[0061] Then, the operation management device 10 transmits a request to the base station 20 to change the scramble code information, etc. (S42). Specifically, the scramble code information and validity period information are transmitted to the base station 20. Next, the operation management device 10 uses a conversion table to convert the scrambled code information into an input code containing numbers, etc., and generates it (S43), which is then displayed on the display unit of the connected operation manager computer 11 (S44). The scrambled code modification process is performed in this manner.

[0062] [Processing at base station 20] The processing performed by base station 20 in another wireless system is the same as that performed by base station 20 in this wireless system, so the explanation is omitted.

[0063] [Processing by mobile station 30: Figure 6] The processing of mobile station 30 will be explained with reference to Figure 6. Figure 6 is a flowchart showing the processing of another wireless system mobile station. As shown in Figure 6, the mobile station 30 inputs the input code displayed on the display unit of the operation manager computer 11 from the input unit (S51), obtains the scrambled code information and the corresponding validity period information using the conversion table stored in the memory unit (built-in ROM), and sets it in the internal memory unit (built-in RAM, etc.) (S52).

[0064] Then, the mobile station 30 sets a timer based on the validity period information stored in the memory unit (S53), counts down the validity period (S54), and then determines whether the remaining time on the timer has reached zero (S55). If the remaining time has reached zero (YES), it deletes the scramble code information (S56) and terminates the process.

[0065] Next, in the determination process S55, if the remaining time on the timer is not zero (if NO), it is determined whether or not a base station wave from base station 20 has been received (S57). If it has not been received (if NO), the process returns to the determination process S55. If it has been received (if YES), the scramble code information included in the wireless format of the base station wave is compared with the scramble code information set in the memory unit to determine if they match (S59). If they do not match (if NO), the process returns to S55. If they match (if YES), communication with base station 20 is enabled as it is within base station range (S59), and when communication ends, the process returns to S55.

[0066] [Effects of the embodiment] According to this wireless system, when the operation management device 10 sets a change in the scramble code, it transmits the scramble code information to the base station 20 and generates a 2D code indicating the scramble code information, which is then displayed on the display unit of the connected operation manager computer 11. The base station 20 receives the updated scramble code information from the operation management device 10, stores it in its built-in RAM, and transmits it to the mobile station 30. The mobile station 30 reads the 2D code displayed on the display unit of the operation manager computer 11, obtains the scramble code information, and sets it in its built-in RAM. When the set scramble code information matches the scramble code information received from the base station 20, communication with the base station 20 is enabled. This has the effect of easily updating the scramble code information without interrupting operations.

[0067] According to another wireless system, when a change in the scramble code setting is made, the operation management device 10 transmits the scramble code information to the base station 20 and displays an input code containing numbers corresponding to the scramble code information on the display of the connected operation manager computer 11. The base station 20 receives the updated scramble code information from the operation management device 10, stores it in its built-in RAM, and transmits it to the mobile station 30. The mobile station 30 stores the scramble code information corresponding to the input code displayed on the display of the operation manager computer 11 in a correspondence table. When an input code is entered from the input unit, the mobile station 30 retrieves the corresponding scramble code information from the correspondence table and sets it in its built-in RAM. When the set scramble code information matches the scramble code information received from the base station 20, communication with the base station 20 is enabled. This has the effect of easily updating the scramble code information without interrupting operations.

[0068] This wireless system and other wireless systems have the effect of quickly changing the scramble code information in the event of theft or loss of the mobile station 30, thereby preventing unauthorized interception of communications within the base station 20. [Industrial applicability]

[0069] The present invention is suitable for wireless systems that allow for easy resetting of scramble codes at base stations and mobile stations without interrupting operations. [Explanation of Symbols]

[0070] 1…Operation management device, 2…Base station, 3…Mobile station, 10…Operation management device, 11…Operation administrator computer, 12…Administrator terminal, 20…Base station, 30…Mobile station

Claims

1. A wireless system comprising an operation management device, a base station, and multiple mobile stations, When a change in the scramble code is set, the operation management device transmits the scramble code information to the base station and generates a two-dimensional code indicating the scramble code information, which is then displayed on a connected display device. The base station receives updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station. The wireless system is characterized in that the mobile station reads the two-dimensional code displayed on the display device to obtain the scramble code information and sets it in an internal storage unit, and when the set scramble code information matches the scramble code information received from the base station, communication with the base station becomes possible.

2. The operation management device sets validity period information in the scrambled code information, generates a two-dimensional code including the validity period information, and transmits the scrambled code information and the validity period information to the base station. The base station stores the scramble code information and the validity period information from the operation management device in its internal memory, and when the validity period has elapsed, it invalidates the scramble code. The wireless system according to claim 1, characterized in that the mobile station reads the two-dimensional code and stores the scramble code information and the validity period information in an internal memory unit, and invalidates the scramble code when the validity period has elapsed.

3. The operation management device transmits the two-dimensional code to the administrator terminal. The wireless system according to claim 1 or 2, characterized in that the administrator terminal displays the received two-dimensional code on its display unit.

4. A wireless system comprising an operation management device, a base station, and multiple mobile stations, When a change in the scramble code is set, the operation management device transmits the scramble code information to the base station and generates an input code containing numbers corresponding to the scramble code information, and displays it on a connected display device. The base station receives updated scramble code information from the operation management device, stores it in its internal memory, and transmits it to the mobile station. The wireless system is characterized in that the mobile station stores information of the scrambled code corresponding to the input code displayed on the display device in a correspondence table, and when the input code is input from the input unit, it retrieves the corresponding scrambled code information from the correspondence table and sets it in an internal storage unit, and when the set scrambled code information matches the scrambled code information received from the base station, communication with the base station becomes possible.

5. The wireless system according to claim 4, wherein the base station and the mobile station store information on the validity period of the scrambled code in their respective memory units, and the scrambled code is invalidated when the validity period has elapsed.

6. The operation management device transmits the input code to the administrator terminal. The wireless system according to claim 4 or 5, characterized in that the administrator terminal displays the received input code on its display unit.

7. The wireless system according to claim 1 or 4, characterized in that when the power to the mobile station is turned off, the scramble code information set in the memory is deleted.

Images