JP3724031B2 - Wireless communication system - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a radio communication system using the wireless communication terminal end, such as a mobile phone.
[0002]
[Prior art]
A wireless telephone system using a wireless communication terminal such as a portable wireless telephone or a car phone basically communicates via a base station. That is, for example, in the case of a wireless telephone system called a cellular system, base stations are arranged at intervals of several kilometers in a service area, and each wireless communication terminal side performs wireless communication with the nearest base station. It is.
[0003]
[Problems to be solved by the invention]
By the way, in each base station, the number of lines that can communicate with the terminal at the same time is determined, and when there are simultaneous calls from a number of terminals exceeding this number of lines, communication with the number of terminals exceeding the number of lines is possible. It becomes a state that can not be. Therefore, when the base stations are actually arranged, it is important to predict the congestion state of communication and set the number of lines appropriately.
[0004]
However, even if the base station is installed with such a prediction, in the urban area where the population density is high, communication may be concentrated at once and the communication line may be congested. In many cases, there is a large margin in the regular communication line.
[0005]
In a system using a conventional wireless communication terminal, no processing for correcting such a communication state has been performed.
[0006]
An object of the present invention is to reduce the usage state of a base station in a communication system using a wireless communication terminal.
[0007]
[Means for Solving the Problems]
The present invention relates to a radio communication terminal end, the first access to a storage means for storing an identification code of a base station a call state provided, stored in the storage unit, the identification code of the base station first accesses for calls The communication center which transmits the data regarding and the identification code of the radio | wireless communication terminal, and receives the data via a base station is provided .
[0008]
According to such a configuration, it is possible to perform processing for reducing the usage state of the base station by using the stored data regarding the first accessed base station.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
[0010]
First, FIG. 1 shows the configuration of a wireless communication terminal to which the present invention is applied. The wireless communication terminal shown in FIG. 1 is a wireless telephone configured in a small size for portable use, and is connected to the base station side by wirelessly transmitting digital data to and from the base station. It is assumed that the radio telephone makes a call with a station. As a communication method, a communication method called a TDMA method (Time Division Multiple Access) is applied. This communication method is a method of transmitting and receiving slotted burst data in a time division manner.
[0011]
Referring to the configuration shown in FIG. 1, two antennas 1 and 2 are provided, the antenna 1 is an antenna dedicated to reception, and the antenna 2 is an antenna for both transmission and reception. Then, the signal received by the antenna 1 is supplied to the front end circuit 5 via the open / close switch 3, and the signal received by the antenna 2 is supplied to the front end circuit 5 via the transmission / reception switching switch 4. . In this case, the reception signals of the antenna that can be satisfactorily received are supplied to the front end circuit 5 by the switches 3 and 4.
[0012]
Then, the front end circuit 5 performs high frequency processing for converting the frequency of a signal of a predetermined transmission channel into a first intermediate frequency signal. In this case, frequency conversion is performed using a frequency signal supplied from the frequency synthesizer 7. The output frequency of the frequency synthesizer 7 is controlled by a control unit 20 which is a system controller that controls the operation of the telephone.
[0013]
Then, the first intermediate frequency signal output from the front end circuit 5 is supplied to the intermediate frequency circuit 6 to perform intermediate frequency processing such as amplification and the second frequency signal supplied from the frequency synthesizer 7 is used. Frequency conversion to intermediate frequency signal. Then, the second intermediate frequency signal is supplied to the data processing circuit 8 to perform demodulation processing of the received data according to the transmission method to which the wireless terminal is applied, and extract various received data included in the demodulated signal. Perform data processing. Then, the audio data in the processed reception data is decoded. Also, the control data in the received data is supplied to the control unit 20 that controls the operation of each unit of the communication terminal.
[0014]
Then, the decoded digital audio data is supplied to the data processing circuit 8, supplied to the digital / analog converter 9 connected to the data processing circuit 8, and converted into an analog audio signal. To the speaker 11 to emit sound.
[0015]
Note that the data received by this terminal is slot-structured burst data that is transmitted intermittently. The control unit 20 detects the synchronization bit in the received data, and the slot-structured data is synchronized with this synchronization bit. The reception timing control for receiving is performed.
[0016]
Next, the configuration of the transmission system will be described. The audio picked up by the microphone 12 is supplied as an audio signal to the analog / digital converter 14 via the amplifier 13 and converted into digital audio data. Then, the converted audio data is supplied to the data processing circuit 8 to obtain compressed audio data encoded by a predetermined encoding method. Then, control data and synchronization data supplied from the control unit 20 are added to the compressed audio data to obtain data having a slot configuration for transmission.
[0017]
Then, the transmission data having the data structure for transmission is supplied to the modulation circuit 15 to be a transmission signal modulated for transmission and frequency-converted to a predetermined transmission channel. In this case, frequency conversion processing to the transmission channel is performed using the frequency signal supplied from the frequency synthesizer 7. Then, the transmission signal output from the modulation circuit 15 is supplied to the changeover switch 4 via the output amplifier 16 and is transmitted by radio from the antenna 2 connected to the changeover switch 4. The gain at the time of amplification by the output amplifier 16 is set by the control of the output control circuit 17 based on a command from the control unit 20.
[0018]
An ID processing unit 30 is connected to the control unit 20 which is a system controller of the telephone. The ID processing unit 30 stores the identification data assigned to the base station and performs a process of comparing the stored identification data with the received identification data.
[0019]
That is, when the slot configuration of data transmitted from each base station is shown in FIG. 2, burst data of one slot is composed of, for example, 312 bits, and this 312-bit slot data is transmitted in about 6.7 milliseconds. . Then, a synchronization bit pattern is transmitted using a predetermined bit at the head of one slot, and unique identification data (ID data) assigned to each base station using 12 bits in the almost central part of one slot. Is transmitted, and the audio data is transmitted in a predetermined section between the synchronization bit and the base station identification data and in a predetermined section after the base station identification data. Actually, various control data other than the synchronization bit and the base station identification data are transmitted, but are omitted here. The 12-bit base station identification data is composed of, for example, an 8-bit identification code and a 4-bit error correction code for the identification code, and is a code that can identify a maximum of 256 base stations.
[0020]
When the 1-slot data configured as described above is received by this wireless communication terminal, the base station identification data extracted by the data processing unit 8 is supplied to the ID processing unit 30 via the control unit 20. It is. Here, when the configuration of the ID processing unit 30 is shown in FIG. 3, the ID processing unit 30 is configured by a nonvolatile memory or the like, and the ID storage unit 31 that stores base station identification data and the ID storage unit 31 store the ID processing unit 30. The base station identification data is compared with the received base station identification data. Then, the received base station identification data is supplied from the control unit 20 to the ID processing unit 30 and the write / read control data in the ID storage unit 31 is supplied. This write / read control data is normally read data, and is written based on the comparison state in the ID comparison unit 32. This process will be described later.
[0021]
The wireless communication terminal also includes a key 18 such as a dial number key, and a display unit 19 including a liquid crystal display panel and a driving circuit thereof. Operation information on the key 18 is supplied to the control unit 20 and the control unit Under the control of 20, the operating state of the telephone is displayed on the display unit 19. In this case, when the base station accessed during a call is a base station that is not registered in the ID processing unit 30 of this wireless communication terminal, a message to that effect is displayed on the display unit 19. That is, as shown in FIG. 4, as a display on the display panel of the display unit 19, in addition to a display 19 a such as a telephone number, “NEW” indicating that a base station that has not been accessed before is accessed. An area for displaying characters 19b is set. The control unit 20 uses the ID processing unit 30 to determine a base station that has not accessed before.
[0022]
Next, processing in the control unit 20 and the ID processing unit 30 based on the received base station identification code in the wireless communication terminal of this example will be described with reference to the flowchart of FIG.
[0023]
First, the control unit 20 of each wireless communication terminal transmits the base station identification data in the slot configuration data transmitted from the base station at this time to the ID processing unit 30 during a call with the other party connected via the base station. And the comparison unit 32 in the ID processing unit 30 compares it with all the base station identification data stored in the ID storage unit 31 (step 101). Then, it is determined whether there is no matching identification data as a result of the comparison (step 102).
[0024]
If there is matching identification data, it is determined that the base station has already been accessed, and the process is terminated. If there is no matching identification data, it is determined that this terminal is the first access base station, and the write / read control data supplied from the control unit 20 to the ID processing unit 30 is temporarily written data. The base station identification data at this time is stored in the ID storage unit 31 (step 103). When the base station identification data is stored, as shown in FIG. 4, the display unit 19 displays a character “NEW” indicating that a base station that has not been accessed before has been accessed. 19b is executed (step 104).
[0025]
In addition, even when processing called handover is performed in which the base station that relays communication is changed to another base station due to movement of the position of the terminal during communication (call), At this time, if the newly relayed base station is the first accessed base station, the processes of steps 103 and 104 are similarly executed. In addition, as described in the process of step 101 of the flowchart described above, what is stored in the ID storage unit 31 of this example is only when an actual call is made. It is not memorized only by making a call or an incoming call (that is, a process for sounding a ringing tone), but a process of memorizing only after moving to a call state after the call or call is performed.
[0026]
By performing the processing in this way, identification data of the base station accessed by the terminal in the past is accumulated in the ID storage unit 31 in the ID processing unit 30. By accumulating data related to base stations that have been accessed in the past in this way, it is possible to use this data to reduce the concentration of communication at a specific base station.
[0027]
For example, when the number of base stations accessed for the first time increases due to the use of this wireless communication terminal, it is possible to give each user a privilege (such as discount on call charges, distribution of some prizes, etc.) Users actively access many base stations, and the concentration of communication at a specific base station is alleviated. For this reason, the company managing the communication network can refrain from increasing the number of base stations in areas where the line is congested, and the cost required for managing the communication network can be reduced.
[0028]
In the above-described embodiment, only the characters indicating that the base station that has not been accessed before is displayed as the display on the terminal. However, for example, the total number of accessed base stations is displayed. Anyway.
[0029]
In addition, the base station data stored in the ID storage unit 31 in the ID processing unit 30 of each wireless communication terminal is statistically processed in the terminal, and detailed display or the like is performed based on the result. good. For example, the data of the accessed base station stored in the ID storage unit 31 is read out under the control of the control unit 20 and is processed by the statistical processing unit provided in the control unit 20 to determine the accessible area, etc. You may make it do.
[0030]
FIG. 6 shows an example in which the result of statistical processing is displayed as described above. For example, a relatively large display unit is provided as a wireless communication terminal, and a rough map of an area in which the terminal can be used is provided on the display unit. Can be displayed. Then, as shown in FIG. 6, the areas a ₁ , a ₂ ,... That have been accessed so far are displayed on the map by changing the display mode (in FIG. 6, hatching is added). Let Further, the mark m in FIG. 6 indicates the currently accessed area.
[0031]
As shown in FIG. 6, the actual location of the base station is not shown in detail, but it is divided into large areas such as prefectures and municipalities and accessed by any base station in that area. If it has been done, it may be determined that the area has been accessed in the past.
[0032]
In the description so far, only the processing in the wireless communication terminal has been described. However, the data related to the accessed base station stored in the ID storage unit 31 of each wireless communication terminal is transmitted via the communication via the base station. May be transmitted to the communication center of the company that manages the network so that the company managing the communication network can grasp the access status of each terminal.
[0033]
That is, the communication network to which the wireless communication terminal of the present embodiment is used, for example, as shown in FIG. 7, a plurality of base stations 51 _1, 51 _2, consists of ‥‥ 51 _m, each base station 51 _1, 51 _2, the ‥‥ 51 _m, the antenna 52 _1, 52 ₂ for performing radio communication terminal and radio communication, ‥‥ 52 _m is is connected. Each of the base stations 51 ₁ , 51 ₂ ,... 51 _m is connected to the communication center 53 through some communication line (wired or wireless line). Is connected to the database unit 54.
[0034]
When the data related to the newly accessed base station (that is, the identification code of the base station) is stored in the ID storage unit 31 of each wireless communication terminal (or when a certain amount of data is stored) Then, the data is transmitted from the terminal to the communication center 53 via the base station using a control channel or the like. When this data is received by the communication center 53, it is determined from which terminal the data is transmitted, and the data is stored in the data storage unit of the corresponding terminal in the database unit 54.
[0035]
FIG. 8 is a diagram illustrating an example of data storage in the database unit 54. For each user number that is an ID of each terminal, an area for storing a list of base stations accessed by the terminal is provided. When the data is transmitted, the corresponding data is added and stored in the area of the user number of the terminal.
[0036]
In this way, by storing data on the access status of each terminal on the communication center side, as described above, a user who uses each terminal is given some privilege according to the number of base stations accessed by that terminal. When performing such processing, the network management company can easily make a judgment for that.
[0037]
In the above-described embodiment, data related to the accessed base station is temporarily stored in the ID storage unit 31 on each terminal side and then transmitted to the center side. However, on each terminal side, the newly accessed base station The determination may be made only on the communication center side without performing determination and storage. That is, for example, as shown in FIG. 7, the database unit 54 connected to the communication center 53 always determines the base station accessed by each terminal, and the base station is newly accessed by this determination. When it is determined, the database unit 54 may store the identification code of the base station.
[0038]
Thus, by determining and storing only at the communication center side, each terminal need not be provided with a circuit for processing the ID of the base station (ID processing unit 30 in FIG. 1), and has been conventionally used. It is possible to provide a service for distributing the above-described usage state of the base station by using the existing terminal as it is.
[0039]
In the above-described embodiment, the data of the newly accessed base station is simply added and stored in the storage unit on the terminal side or the communication center side. However, the data is stored with some condition added. Anyway. For example, storage is performed for a limited period or time, or when a predetermined period (for example, one year) elapses from the start of the initial storage, the stored data relating to the terminal is temporarily deleted, and the data of the accessed base station is taken again You may do it.
[0040]
In the above-described embodiment, a terminal for a TDMA wireless telephone system is used as the wireless communication terminal. However, it is needless to say that the present invention can be applied to a wireless terminal of another communication system (for example, CDMA system).
[0041]
【The invention's effect】
According to radio communications system of the present invention, by using the data relating to the stored first accessed the base station, will allow the process of the small deviation of the state of use of the base station. For example, as the number of base stations accessed for the first time increases, giving the user using this terminal some benefit, the user using this terminal will actively change the base station accessed, It can alleviate the concentration of access to the base station.
[0042]
In this case, since the statistical processing of the accessed base station is performed using the identification code stored in the storage means, an outline of the previously accessed base station can be easily understood on the terminal side.
[0043]
In addition, since the data related to the accessed base station stored on the terminal side is transmitted to the communication center side via the base station, the access history of each terminal can be easily grasped on the communication center side. Thus, it becomes possible to easily perform a process such as giving a certain privilege to a user who has a large number of accessed base stations, and a process for mitigating the concentration of communication on a specific base station can be easily performed.
[0044]
Further, according to the radio communication system of the present invention, the data related to the identification code of the base station accessed by the radio communication terminal is transmitted and the base station receives the data, so that the communication center side connected to the base station It becomes possible to grasp the access history of each terminal, and it is possible to provide some service that encourages users who use each wireless communication terminal to change the base station to access, and communicates to a specific base station Will be able to ease the concentration.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a wireless communication terminal to which an embodiment of the present invention is applied.
FIG. 2 is an explanatory diagram illustrating a data configuration transmitted in the communication system according to the embodiment.
FIG. 3 is a configuration diagram illustrating a main part of the wireless communication terminal in the example of FIG. 1;
FIG. 4 is an explanatory diagram illustrating a display example on a terminal according to an embodiment;
FIG. 5 is a flowchart illustrating a base station identification code comparison process according to an embodiment.
FIG. 6 is an explanatory diagram illustrating a display example when an access history is displayed according to an embodiment.
FIG. 7 is a configuration diagram illustrating a configuration on the base station side according to an embodiment;
FIG. 8 is an explanatory diagram illustrating a data example of a database unit connected to the base station side according to an embodiment;
[Explanation of symbols]
20 control unit 30 ID processing unit 31 ID storage unit 32 ID comparison unit 51 ₁ , 51 ₂ ,... 51 _m base station 53 communication center 54 database unit

Claims (3)

In a wireless communication system that performs wireless communication between a plurality of base stations arranged in a predetermined state and a wireless communication terminal,
The base station that transmits data transmitted from the base station to the wireless communication terminal with a unique identification code assigned to each base station; and
Storage means for storing the identification code of the base station that has already accessed the wireless communication terminal and is in a call state;
Control means for storing the identification code of the base station accessed for the first time in the storage means;
Provide a display means to display that you have accessed for the first time,
The wireless communication terminal transmits data relating to the identification code of the base station accessed for the first time stored in the storage means and the identification code of the wireless communication terminal, and transmits the data via the base station. A wireless communication system further comprising a communication center for receiving.   2. The wireless communication system according to claim 1, wherein statistical processing of a base station accessed for a call is performed using the identification code stored in the storage means.   The wireless communication system according to claim 1, wherein the wireless communication terminal transmits data related to the identification code of the base station accessed for the first time stored in the storage means, and the base station receives the data.

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