CN1134126C - mobile communication system - Google Patents

Abstract

The mobile switching center 27 independently changes the transmission rate of communication data transmitted from the mobile station 16 to the database 11 or from the database 11 to the mobile station 16 in response to a request from the mobile station 16 or the like or the database 11 .

Description

mobile communication system

technical field

The present invention relates to a mobile communication system in which an asymmetrical data communication channel is set in which the transmission rate of communication data transmitted from a mobile station to a base station is different from the transmission rate of communication data transmitted from a base station to a mobile station.

Background technique

FIG. 1 is a diagram showing a configuration of a conventional mobile communication system disclosed in, for example, Japanese Patent Application Laid-Open Nos. 8-331153. In the figure, 1 is a movable mobile station installed in a car, etc., 2 is a low-speed transmission device that transmits communication data at a low transmission speed to the base station 5, and 3 is a device that receives communication data at a high transmission speed from the base station 5. A high-speed receiving device, 4 is the uplink of the data communication channel, 5 is a base station for wireless communication with the mobile station 1 belonging to the wireless coverage area, and 6 is a low-speed receiving device for receiving communication data at a low transmission speed from the mobile station 1 , 7 is a high-speed transmission device for transmitting high-speed communication data to the mobile station 1, and 8 is a downlink of the data communication channel.

Hereinafter, the operation will be described.

For example, when mobile station 1 needs to transmit communication data to a communication device (not shown in the figure) connected to the public communication network, it receives the control channel of base station 5 and calls through the control channel assigned to mobile station 1.

That is, the mobile station 1 transmits control information required for wireless communication to the base station 5 through the control channel (for example, for instructing to transmit at a low transmission rate when transmitting communication data to the base station 5, and to transmit at a low transmission rate when receiving communication data from the base station 5 Information for receiving high-speed communication data).

Then, when the control information is transmitted from the mobile station 1, the base station 5 transmits the control information transmitted from the mobile station 1 to a mobile switching center not shown in the figure, and after the mobile switching center approves the intention of the mobile station 1, The base station 5 notifies the mobile station 1 that its intention has been granted through the control channel.

Thus, the transmission rate of the communication data transmitted from the mobile station 1 to the base station 5 is set to a low transmission rate, and the transmission rate of the communication data transmitted from the base station 5 to the mobile station 1 is set to a high transmission rate, Thereby, asymmetric wireless communication in which the transmission speeds of the uplink 4 and the downlink 8 are different is realized.

Since the existing mobile communication system is configured as described above, it is possible to realize asymmetric wireless communication in which the transmission speeds of the uplink 4 and the downlink 8 are different, but since there is no device for changing the transmission speed of communication data, However, once the transmission rate of communication data is set, there is a problem that it cannot be changed to a transmission rate suitable for the amount of data even if the amount of data changes over time.

The present invention was developed to solve the above-mentioned problems, and an object of the present invention is to provide a mobile communication system in which the transmission rate of communication data can be appropriately changed after the transmission rate of communication data is set.

disclosure of invention

In the mobile communication system of the present invention, the mobile switching center changes the transmission rate of communication data transmitted from the mobile station to the communication device in response to a request from the mobile station or a communication device connected to a public communication network.

In this way, there is an effect that even if the data volume of the communication data transmitted from the mobile station to the communication device changes after the transmission rate of the communication data is once set, it can still be appropriately changed to the data rate corresponding to the data rate. Adaptive transmission speed.

In the mobile communication system of the present invention, the mobile switching center changes the transmission rate of communication data transmitted from the communication device to the mobile station in response to a request from the mobile station or the communication device.

In this way, there is such an effect that even if the data volume of the communication data transmitted from the communication device to the mobile station changes after the transmission rate of the communication data is once set, it can still be appropriately changed to the data rate corresponding to the data rate. Adaptive transmission speed.

In the mobile communication system of the present invention, the mobile switching center independently changes the communication data transmitted from the mobile station to the communication device or the transmission of the communication data transmitted from the communication device to the mobile station according to the request from the mobile station or the communication device. speed.

In this way, there is an effect that, once the transmission speed of the communication data is set, even if the data volume of the communication data transmitted from the mobile station to the communication device or the communication data transmitted from the communication device to the mobile station occurs Changes can also be appropriately changed to a transmission speed that adapts to the amount of data.

In the mobile communication system of the present invention, the transmission speed changed by the mobile switching center is a speed belonging to the range of high-speed data transmission.

In this way, there is an effect that the transmission time can be shortened when the amount of data is extremely large.

In the mobile communication system of the present invention, the transmission speed changed by the mobile switching center is a speed within the range of medium-speed data transmission.

In this way, there is an effect that wireless communication suitable for the amount of data can be realized.

In the mobile communication system of the present invention, the transmission speed changed by the mobile switching center is a speed belonging to the range of low-speed data transmission.

In this way, there is an effect that wireless communication suitable for the amount of data can be realized.

The mobile communication system of the present invention includes intermittent data transmission within the range of low-speed data transmission.

In this manner, there is an effect that the data communication channel can be released within the time zone in which no communication data is transmitted.

In the mobile communication system of the present invention, TDMA/TDD, TDMA/FDD, time-division CDMA/TDD, time-division CDMA/FDD or CDMA/TDD are used as the transmission method for high-speed data transmission.

In this manner, there is an effect that high-speed data transmission can be performed in the above-described manner or the like.

In the mobile communication system of the present invention, TDMA/TDD, TDMA/FDD, time-division CDMA/TDD, time-division CDMA/FDD, or CDMA/TDD are used as medium-speed data transmission transmission methods.

In this manner, there is an effect that medium-speed data transmission can be performed in the above-described manner or the like.

In the mobile communication system of the present invention, TDMA/TDD, TDMA/FDD, time-division CDMA/TDD, time-division CDMA/FDD, or CDMA/TDD are used as the transmission method for low-speed data transmission.

In this manner, there is an effect that low-speed data transmission can be performed in the above-described manner or the like.

In the mobile communication system of the present invention, a transition state control processor is provided in the mobile switching center to manage the state transition of the transmission speed of each mobile station when there are a plurality of mobile stations that transmit and receive communication data through the base station.

In this way, there is an effect that the transmission rate of communication data can be accurately changed even if there are a plurality of mobile stations transmitting and receiving communication data via the base station.

In the mobile communication system of the present invention, a priority control processor is provided in the mobile switching center for managing the setting operation of the data communication channel of the mobile switching center and the changing operation of the transmission speed of the mobile switching center.

In this way, there is an effect that the setting operation of the data communication channel and the like can be managed reliably.

In the mobile communication system of the present invention, when the mobile station registers the location, the mobile switching center registers the transmission speed that the mobile station can handle, and simultaneously registers the speed switching time of the mobile station.

In this way, there is an effect that the mobile switching center can quickly change the communication data transmission speed as needed.

In the mobile communication system of the present invention, an information memory is provided in the mobile switching center for storing the transmission speed that the mobile station can handle, and at the same time storing the speed switching time of the mobile station.

In this way, there is an effect that the mobile switching center can reliably grasp the transmission rate etc. that the mobile station can handle.

In the mobile communication system of the present invention, when the mobile station and the communication device start to transmit communication data, the mobile switching center selects the maximum transmission speed that the current data communication channel can allow among the transmission speeds that the mobile station can handle, and sends The transmission rate information indicating the transmission speed is notified to the base station and the mobile station.

In this way, there is an effect that the transmission speed of communication data can be shortened.

In the mobile communication system of the present invention, after notifying the base station and the mobile station of the transmission rate information, when the speed switching time of the mobile station stored in the information memory has elapsed, the switching timing information for instructing switching of the transmission speed is notified to the base station and the mobile station. mobile station.

In this way, there is an effect that the transmission speed can be changed quickly and reliably.

In the mobile communication system of the present invention, after receiving notification of handover timing information from the mobile switching center, communication data is transmitted and received at a new transmission speed from the time slot in the first frame after receiving the notification.

In this way, there is an effect that the transmission speed can be changed quickly and reliably.

In the mobile communication system of the present invention, when the moving speed is within the walking speed range, if it is detected that the moving speed exceeds the walking speed range, the vehicle speed information indicating this situation will be notified to the mobile switching center through the base station.

In this way, there is an effect that the time slot can be changed to suit the traveling speed of the vehicle.

In the mobile communication system of the present invention, when the moving speed is within the range of the driving speed of the vehicle, if it is detected that the moving speed drops below the driving speed range of the vehicle, the information indicating that the driving speed of the vehicle is released will be notified to the mobile through the base station. exchange center.

In this way, there is an effect that the time slot can be changed to suit the walking speed.

In the mobile communication system of the present invention, an information memory is provided in the mobile switching center for storing the vehicle speed information when the mobile station notifies the mobile switching center of the vehicle speed information through the base station.

In this way, there is an effect that it can be reliably grasped that the moving speed of the mobile station remains within the range of the traveling speed of the vehicle.

The mobile communication system of the present invention is provided with an information memory in the mobile switching center, and is used for storing the vehicle speed cancellation information when the vehicle speed cancellation information is notified from the mobile station to the mobile switching center through the base station.

In this manner, there is an effect that it can be reliably grasped that the moving speed of the mobile station is kept within the walking speed range.

In the mobile communication system of the present invention, a mode setting processor is provided in the mobile switching center to change the time slot so that the guard time of the data communication channel is suitable for the vehicle speed when the vehicle speed information is stored in the information memory.

In this way, there is an effect that the guard time of the data communication channel can be kept at an appropriate value.

In the mobile communication system of the present invention, a mode setting processor is provided in the mobile switching center to change the time slot so that the guard time of the data communication channel is suitable for the walking speed when the vehicle speed release information is stored in the information memory.

In this way, there is an effect that the guard time of the data communication channel can be kept at an appropriate value.

In the mobile communication system of the present invention, when the communication data is transmitted from the communication device to the mobile station, the communication device notifies the mobile switching center of the data volume of the communication data.

In this way, there is an effect that, since the mobile switching center can grasp the amount of communication data, when the communication device transmits a large amount of communication data, it can be determined whether the mobile station can reliably receive the large amount of communication data.

In the mobile communication system of the present invention, when the communication data is transmitted from the mobile station to the communication device, the mobile station notifies the mobile switching center of the data volume of the communication data.

In this way, there is an effect that since the mobile switching center can grasp the amount of communication data, when the mobile station transmits a large amount of communication data, it can be determined whether the communication device can reliably receive the large amount of communication data.

In the mobile communication system of the present invention, when communication data is transmitted from a communication device or a mobile station to another communication device or another mobile station, the communication device or mobile station that transmits the communication data notifies the mobile switching center of the data volume of the communication data.

In this way, there is an effect that, since the mobile switching center can grasp the data volume of communication data, it is possible to judge whether other communication devices or other mobile stations are reliable when a communication device or a mobile station transmits a large amount of communication data. to receive a large amount of communication data.

In the mobile communication system of the present invention, the maximum transmission speed that can actually be transmitted is judged according to the maximum transmission speed that the mobile station can perform and the state of the current empty data communication channel, and at the same time, when the maximum transmission speed starts to transmit communication data , judging whether the amount of data notified from the communication device can be transmitted within a certain period of time, and rejecting the transmission of the communication data when it is determined that the transmission cannot be within a certain period of time.

In this way, there is an effect that reception errors of communication data can be avoided.

In the mobile communication system of the present invention, the maximum transmission speed that can actually be transmitted is judged according to the maximum transmission speed that the mobile station can perform and the state of the current empty data communication channel, and at the same time, when the maximum transmission speed starts to transmit communication data , judging whether the amount of data notified from the mobile station can be transmitted within a certain time, and rejecting the transmission of the communication data when it is judged that the transmission cannot be within a certain time.

In this way, there is an effect that reception errors of communication data can be avoided.

In the mobile communication system of the present invention, the maximum transmission speed that can actually be transmitted is judged according to the maximum transmission speed that the mobile station can perform and the state of the current empty data communication channel, and at the same time, when the maximum transmission speed starts to transmit communication data , judging whether the amount of data notified from the communication device or mobile station that transmits the communication data can be transmitted within a certain time, and rejecting the transmission of the communication data when it is judged that the transmission cannot be within a certain time.

In this way, there is an effect that reception errors of communication data can be avoided.

In the mobile communication system of the present invention, when the mobile station is handed over, the mobile switching center changes the transmission speed between the mobile station and the base station according to the state of the empty data communication channel of the handover target base station.

In this way, there is an effect of optimizing the transmission rate of communication data every time a mobile station is handed over.

In the mobile communication system of the present invention, before performing handover of the mobile station, the handover target base station is determined, and at the same time, the state of the empty data communication channel of the handover target base station is judged.

In this way, it is possible to prevent the disconnection of the radio connection that occurs with the handover of the mobile station.

In the mobile communication system of the present invention, electric field strengths of radio waves transmitted from all base stations adjacent to the currently connected base station are detected, and the electric field strengths are notified to the mobile switching center.

In this way, there is an effect that the criteria for selecting the optimum base station can be provided to the mobile switching center.

In the mobile communication system of the present invention, when receiving an indication from the mobile switching center, the mobile station notifies the electric field strength to the mobile switching center.

In this way, there is an effect that the electric field strength is available when the mobile switching center requires it.

In the mobile communication system of the present invention, when receiving an indication from the base station, the mobile station notifies the electric field strength to the mobile switching center.

In this manner, there is an effect that the mobile switching center can obtain the electric field strength when the base station judges that the electric field strength is required by the mobile switching center.

In the mobile communication system of the present invention, electric field strengths of radio waves transmitted from base stations are compared with each other, and a base station emitting radio waves with the highest electric field strength is determined as a handover target base station.

In this way, there is an effect that an optimal base station can be determined as a handover target base station.

In the mobile communication system of the present invention, a data communication channel capable of achieving the maximum transmission speed within the range of the maximum transmission speed executable by the mobile station is selected among empty data communication channels of the handover target base station.

In this way, there is an effect of optimizing the transmission rate of communication data every time a mobile station is handed over.

In the mobile communication system of the present invention, when the transmission rate becomes faster after the handover of the mobile station is performed, the handover is performed before the transmission rate is changed.

In this way, there is an effect that the handover of the mobile station can be quickly performed.

In the mobile communication system of the present invention, when the transmission rate becomes low after the handover of the mobile station is performed, the handover is performed after changing the transmission rate.

In this way, it is possible to prevent the disconnection of the radio connection that occurs with the handover of the mobile station.

In the mobile communication system of the present invention, when increasing the transmission rate of communication data transmitted from the mobile station to the communication device, the transmission power of the mobile station is checked before increasing the transmission rate.

In this manner, it is possible to determine whether or not the transmission speed of communication data can actually be increased.

In the mobile communication system of the present invention, when increasing the transmission rate of communication data transmitted from the communication device to the mobile station, the transmission power of the base station is checked before increasing the transmission rate.

In this manner, it is possible to determine whether or not the transmission speed of communication data can actually be increased.

In the mobile communication system of the present invention, the transmission power of the mobile station is checked by checking the reception power of the base station.

In this way, there is an effect that the transmission power of the mobile station can be confirmed reliably.

In the mobile communication system of the present invention, the transmission power of the base station is checked by checking the reception power of the mobile station.

In this way, there is an effect that the transmission power of the base station can be confirmed reliably.

In the mobile communication system of the present invention, the instruction to increase the transmission power level is notified to the mobile station, and at the same time, the instruction to report the received power is notified to the base station.

In this manner, it is possible to determine whether or not the transmission speed of communication data can actually be increased.

In the mobile communication system of the present invention, the instruction to increase the transmission power level is notified to the base station, and at the same time, the instruction to report the received power is notified to the mobile station.

In this manner, it is possible to determine whether or not the transmission speed of communication data can actually be increased.

In the mobile communication system of the present invention, when the increase of the transmission power of the mobile station cannot adapt to the speed change of the transmission speed, the change of the transmission speed is rejected.

In this way, there is an effect that, when the transmission speed cannot be increased, it is possible to prevent invalid processing that tries to increase the transmission speed from occurring, and at the same time, it is possible to prevent communication abnormality that occurs with such an invalid process.

In the mobile communication system of the present invention, when the increase of the transmission power of the base station cannot adapt to the speed change of the transmission speed, the change of the transmission speed is rejected.

In this way, there is an effect that, when the transmission speed cannot be increased, it is possible to prevent invalid processing that tries to increase the transmission speed from occurring, and at the same time, it is possible to prevent communication abnormality that occurs with such an invalid process.

In the mobile communication system of the present invention, the change of the transmission rate is allowed when the increase of the transmission power of the mobile station can be adapted to the change of the transmission rate.

In this way, there is an effect that the transmission speed of communication data can be increased.

In the mobile communication system of the present invention, when the increase in the transmission power of the base station can accommodate the speed change of the transmission speed, the change of the transmission speed is allowed.

In this way, there is an effect that the transmission speed of communication data can be increased.

In the mobile communication system of the present invention, when the transmission rate is doubled, an instruction to increase the transmission power by 3 decibels is notified to the mobile station.

In this way, there is an effect that the transmission speed can be doubled.

In the mobile communication system of the present invention, when the transmission speed is doubled, an instruction to increase the transmission power by 3 decibels is notified to the base station.

In this way, there is an effect that the transmission speed can be doubled.

A brief description of the drawings

FIG. 1 is a block diagram showing a conventional mobile communication system.

Fig. 2 is a block diagram showing a mobile communication system according to Embodiment 1 of the present invention.

FIG. 3 is a data structure diagram showing a PCS and a cellular slot structure for time-division CDMA, high-speed TDMA, and low-speed TDMA.

Fig. 4 is a state transition diagram of the mobile communication system.

Fig. 5 is a flow chart illustrating the operation of the mobile communication system according to Embodiment 1 of the present invention.

Fig. 6 is a detailed configuration diagram showing the mobile switching center of the mobile communication system according to Embodiment 2 of the present invention.

Fig. 7 is a state transition diagram illustrating a control subject of the mobile communication system.

Fig. 8 is a flow chart showing transmission in the mobile communication system according to Embodiment 3 of the present invention.

FIG. 9 is a tabular diagram showing the contents of the mobile station information memory 35 for storing the transmission rate that the mobile station can handle and the speed switching time.

Fig. 10 is a flow chart showing transmission in the mobile communication system according to Embodiment 4 of the present invention.

Fig. 11 is a flow chart showing transmission in the mobile communication system according to Embodiment 5 of the present invention.

Fig. 12 is a flowchart showing a confirmation procedure before handover.

Fig. 13 is a flow chart showing transmission in the mobile communication system according to Embodiment 6 of the present invention.

Fig. 14 is a flow chart showing transmission in the mobile communication system according to Embodiment 7 of the present invention.

Fig. 15 is a flowchart showing a transmission power confirmation procedure.

Best Mode for Carrying Out the Invention

Hereinafter, in order to describe the present invention in more detail, the best mode for carrying out the present invention will be described with reference to the drawings. Embodiment 1

Fig. 2 is a block diagram showing a mobile communication system according to Embodiment 1 of the present invention. In the figure, 11 is a database (communication device) connected to the public communication network 12, 12 is a public communication network (public service telephone network: PSTN), 13, 14, and 15 are switching centers belonging to PSTN12, and 16-22 are installation A communication device in an automobile or the like, a portable communication device, or a semi-fixed WLL (Wireless Local Loop) station, these communication devices are hereinafter referred to as mobile stations. 23 to 26 are base stations that exchange control information required for wireless communication with mobile stations 16, etc. that belong to the wireless coverage area through the control channel, and at the same time send and receive communication data including voice data and image data through the data communication channel, and 23a is The wireless coverage area of base station 23, 24a is the wireless coverage area of base station 24, 25a is the wireless coverage area of base station 25, 26a is the wireless coverage area of base station 26, 27,28,29 is to receive data communication from the database 11 that is connected with PSTN12 The required control information simultaneously receives the control information transmitted from the mobile station 16 through the base station 23, etc., and sets the transmission speed of the communication data transmitted and received between the mobile station 16, etc., and the database 11 according to the two control information. exchange center.

Hereinafter, the operation will be described.

First of all, the user number, user ID, billing, authentication, etc. in the mobile communication system are control information that have nothing to do with the characteristics of the communication medium.

On the other hand, the permissible transmission speed or speed switching time of a user terminal (mobile station 16, database 11, etc.) may vary greatly depending on the setting of each user terminal or system.

Hereinafter, in this specification, the processing of the transmission speed and the like depending on the characteristics of the communication medium will be described in detail, and the former will not be specifically mentioned.

First, the mobile switching center 27 etc. which controls the base station 23 etc. are wired to the PSTN 12 as shown in FIG. And frequency division multiple access time division duplex communication mode (Frequency Division Multiple Access/Time Division Duplex: FDMA/TDD mode), code division multiple access time division duplex communication mode (Code Division Multiple Access/Time Division Duplex: CDMA/TDD mode ), Multi-Carriers Time Division Multiple Access/Frequency Division Duplex (Multi-Carriers Time Division Multiple Access/Frequency Division Duplex: TDMA/FDD mode), TDMA/TDD mode, Time Division CDMA/FDD mode or Time Division CDMA/TDD mode, etc. Wireless connections.

Here, Fig. 3 shows the time slot structure of PCS (personal communication system) and cellular for time division CDMA, #41-0～3 are the time slots for PCS, #47-T1/R1, T2/R2 are for Cellular slots.

In addition, time slot #44-T0/R0 for TDMA medium-speed data communication, time slot #51-T0/R0, T1/R1, T2/R2, T3, T7A, And time slot #52-T7C for time-division CDMA high-speed data communication.

However, other low-speed TDMA slots (those marked with *) are shown as voice data, low-speed data, or used as control channels.

In Figure 3, the downlink time slots are five time slots T0, T1, T2, T3 and T7, and the uplink time slots are three time slots R0, R1 and R2, forming an asymmetric time division dual Industrial communication mode (TDD mode).

Below, the state transition of the wireless line between mobile station 16 etc. and base station 23 etc. is described with the state transition diagram of Fig. 4 and the flowchart of Fig. There are the same state transition diagrams as in FIG. 4 whose number is equivalent to the number of mobile stations, and here, for convenience of description, only the state transition between the mobile station 16 and the base station 23 is described).

First, when mobile station 16 makes a call, in state J1, mobile station 16 receives a control channel transmitted from base station 23, and requests a wireless connection through a time slot in the control channel allocated to mobile station 16 (step ST1).

Then, when the wireless connection request is sent from the mobile station 16, the mobile switching center 27 receives the wireless connection request by the base station 23, and judges whether the wireless connection is normal at the same time, and sets the communication channel between the mobile station 16 and the base station 23 (step ST2).

On the other hand, when the base station 23 makes a call (the call of the base station 23 is a call carried out simultaneously with the call of the database 11), in the state J1, the base station 23 uses the broadcast channel in the control channel to transmit the mobile data specified by the database 11. The telephone number of the station 16 (step ST3).

Then, when the mobile station 16 that has received its own phone number responds to the base station 23 through the designated control channel, the mobile switching center 27 sets a communication channel or a low-speed data channel between the mobile station 16 and the base station 23 (step ST4).

However, when setting a call channel, the mobile switching center 27 receives control information necessary for wireless communication from the mobile station through the control channel. For example, information such as a transmission rate that the mobile station 16 can handle is received.

Next, after the call channel is set between the mobile station 16 and the base station 23, the online operator of the PSTN 12 receives the mobile station ID from the mobile station 16 through the FACCH (Fast Access Control Channel) of the call channel, and verifies the mobile station 16 etc. (step ST5).

After the mobile station 16 is authenticated by the connection operator of the PSTN12, the mobile switching center 27 sets up a data communication channel between the mobile station 16 and the base station 23 (steps ST6, ST7), and transfers from state J1 to state J2.

Thus, transmission and reception of communication data can be started between the mobile station 16 and the database 11, but first, the database 11 starts a preparatory communication for confirming whether the mobile station 16 has the ability to process communication data or the like.

When carrying out the above-mentioned preparatory communication, since the transmission amount of the communication data is small, usually, the uplink (the transmission line for transmitting the communication data from the mobile station 16 to the database 11) and the downlink (from the database 11 to the mobile station 16 The transmission speed of the transmission line for transmitting communication data) is set in the range of low-speed data transmission (19.6Kbps or less).

Although both uplink and downlink are set in the range of low-speed data transmission, the transmission speeds of uplink and downlink are not necessarily the same. For example, sometimes the transmission speed of uplink is set to 8Kbps, while The downlink transmission rate is set to 2 Kbps (setting of asymmetric wireless communication).

In addition, when high-speed data transmission or medium-speed data transmission is required from the beginning, the transmission speed is sometimes set in the range of high-speed data transmission (above 200Kbps) or medium-speed data transmission (above 19.6Kbps and below 200Kbps) .

According to the above method, the transmission speed of the data communication channel for wireless connection between the mobile station 16 and the base station 23 is set, and the transmission and reception of communication data are started. However, the amount of communication data is often not fixed. , the amount of data will change, so, at the initially set transmission speed, failures such as inability to transmit communication data in a short period of time may occur.

Therefore, in the present embodiment 1, once the transmission rate of the communication data is set, if there is a request for changing the transmission rate from the mobile station 16 or the database 11, the mobile switching center 27 will consider that the mobile station 16 can handle it. The transmission speed of the uplink and the downlink are independently changed according to the transmission speed of the transmission speed and the state of the current empty data communication channel.

J3～J8 show the state after the mobile switching center 27 changes the transmission speed of the uplink and downlink according to the request from the mobile station 16 or the database 11, but the so-called intermittent data transmission in J6～J8 refers to There is a data transmission method in which the communication data is not transmitted while the wireless connection between the mobile station 16 and the base station 23 is maintained. When it is judged that there is a state transfer to this intermittent data transmission, in this case, the billing of the continuous fee is only carried out when transmitting the communication data, so there is an advantage that the communication fee can be made cheaper. The time zone for transmitting communication data can also function to enable the base station 23 to release the data communication channel.

As can be seen from the above, according to the present embodiment 1, the mobile switching center 27 can independently change the transmission speed or the transmission rate of the communication data transmitted from the mobile station 16 to the database 11 according to the request from the mobile station 16 or the database 11 in structure. The transmission speed of the communication data transmitted from the database 11 to the mobile station 16, so such an effect can be obtained, that is, once the transmission speed of the communication data is set, even the data of the communication data transmitted from the mobile station 16 to the database 11 Even if the amount of data or the data amount of communication data transmitted from the database 11 to the mobile station 16 changes, it can still be appropriately changed to a transmission speed suitable for the amount of data.

Therefore, an effect of establishing a multimedia wireless environment can also be obtained. Implementation form 2

Fig. 6 is a structural diagram showing in detail the mobile switching center of the mobile communication system according to Embodiment 2 of the present invention. In the figure, 31 is a PSTN interface, 32 is a call circuit switching section, and 33 is a communication data section when carrying out high-speed data transmission. 34 is a data number management processor, and 35 is a mobile station information memory that stores the transmission speeds that can be handled by mobile stations 16 and the like while storing the speed switching time of these mobile stations 16 and the like. Station information memory 35 also stores vehicle travel speed information or vehicle travel speed release information.

In addition, 36 is a transition state control processor for managing the state transition of the transmission rate of each mobile station when there are a plurality of mobile stations transmitting and receiving communication data through the base station 23, etc., 37 is a priority control processor, Used to manage the setting operation of the data communication channel of the mobile switching center 27, the verification operation of the network operator to the mobile station 16, etc., and the change operation of the transmission speed of the mobile switching center 27, 38 is a mode setting processor, when output When changing the speed request, change the transmission speed, and at the same time, when storing the vehicle speed information or the vehicle speed cancellation information in the mobile station information memory 35, change the time slot so that the guard time of the data communication channel is suitable for the mobile station 16, etc. speed. 39 is a signaling processor, and 40 is a base station interface. In FIG. 6, the structure of the mobile switching center 27 is shown, and the mobile switching centers 28 and 29 also have the same structure.

Hereinafter, the operation will be described.

In the above-mentioned first embodiment, the structure of the mobile switching center 27 and the like is not specifically described, but the mobile switching center 27 and the like are structured as shown in FIG. As shown, the mobile switching center and the base station are used as windows for receiving the change request of the transmission rate from the mobile station 16 and the like or the database 11, and the mobile switching center 27 and the like are responsible for controlling the process of changing the data rate.

In addition, in particular, in the mobile switching center 27 and the like, the mode setting processor 38 executes a process of receiving a transmission speed change request, and sets the transmission speed so as to match the speed requested for the communication data transmission speed. .

When the database 11, for example, preserves a large amount of geological and crustal data like a database of a geophysical institute and has the function of sending the large amount of data and the function of receiving a large amount of data, it is possible to consider sending data between the database 11 and the mobile station 16, etc. and the case of receiving large amounts of data.

However, when a large amount of data is transmitted, if a large amount of data is only sent without managing the transmission speed, etc., the transmission capacity of the mobile station 16 or the database 11 cannot be fully utilized, and sometimes the data transmission time will be prolonged and exceed Inappropriate conditions for specifying time.

Therefore, in this case, since the mobile switching center can receive a transmission rate change request from the mobile station or the database 11 and change the transmission rate, the transmission capability of the mobile station or the database 11 can be fully utilized. Implementation form 3

FIG. 8 is a flow chart showing the transmission of the mobile communication system according to Embodiment 3 of the present invention, and FIG. 9 is a tabular diagram showing the contents of the mobile station information memory 35 for storing the transmission speed and speed switching time which can be handled by each mobile station.

Hereinafter, the operation will be described.

First, when the mobile station 16 enters the wireless coverage area 23a of the base station 23 (in Embodiment 3, the mobile station 16 is used as an example), the mobile station 16 sends a location registration request to the base station 23 through the control channel (P1) .

Then, when the base station 23 receives a location registration request from the mobile station 16, it registers the location of the mobile station 16 and simultaneously transmits the location registration request to the mobile switching center 27 (P1).

Next, when the mobile switching center 27 receives the location registration request from the base station 23, it transmits a signal requesting notification indicating the transmission speed (hereinafter referred to as "transmission rate") that the mobile station can handle and the speed switching time information through the base station 23. To mobile station 16 (P2).

Therefore, after the mobile station 16 transmits the transmission rate and the speed switching time to the mobile switching center 27 through the base station 23 (P3), the mobile switching center 27 stores the transmission rate and the speed switching time transmitted from the mobile station 16 in the mobile station In the information memory 35, the transmission rate of the mobile station 16 and the like are registered (see FIG. 9).

As above, in the state where the transmission rate of the mobile station 16, etc. has been registered, when the database 11 or the mobile station 16 calls (the information indicating the transmission speed required by the calling party is included in the call) (P4, P5) , the mobile switching center 27 selects the transmission rate required by the calling party from the transmission rates stored in the mobile station information memory 35, and notifies the base station 23 and the mobile station 16 of the transmission rate information (P6, P7).

In addition, after the mobile switching center 27 notifies the base station 23 and the mobile station 16 of the information of the transmission rate, it also counts the time with the sending time of the notification as the starting point, and stores it in the mobile station information memory 35 when the time arrives. When the speed switching time of , the switching timing information is notified to the base station 23 and the mobile station 16 (P9, P10). Here, the mobile switching center 27 counts the time and notifies the handover timing information, but the base station 23 may count the time and notify the mobile station 16 of the handover timing information according to the instruction of the mobile switching center 27 .

Next, after the handover timing information is notified from the mobile switching center 27, the base station 23 and the mobile station 16 start transmission and reception of communication data at a transmission rate corresponding to the previously notified transmission rate information (P11, P12).

According to the above method, the transmission and reception of communication data can be started, but when a change request of the transmission speed is sent by the database 11 or the mobile station 16 during the communication of the communication data (P13, P14), the mobile switching center 27, from the data stored in the The transmission rate corresponding to the change request is selected from among the transmission rates in the mobile station information memory 35, and information on the transmission rate is notified to the base station 23 and the mobile station 16 (P15, P16).

In addition, after the mobile switching center 27 notifies the base station 23 and the mobile station 16 of the information of the transmission rate, it also counts the time with the sending time of the notification as the starting point, and stores it in the mobile station information memory 35 when the time arrives. When the speed switching time is specified, the switching timing information is notified to the base station 23 and the mobile station 16 (P18, P19).

Next, after the handover timing information is notified from the mobile switching center 27, the base station 23 and the mobile station 16 restart transmission and reception of communication data at a new transmission rate from the time slot in the first frame after receiving the notification (P20 ,twenty one).

According to the above method, the transmission speed of the communication data can be changed, but when a request for changing the guard time of TDMA is sent from the mobile station 16 along with the change of the transmission speed, the mobile switching center 27 will notify the information indicating the new guard time The base station 23 and the mobile station 16 (P23, P24).

In addition, after the mobile switching center 27 notifies the base station 23 and the mobile station 16 of the information indicating the new protection time, it also counts the time with the sending time of the notification as the starting point, and when the time reaches the time specified by the mobile station 16 , the handover timing information is notified to the base station 23 and the mobile station 16 (P26, P27).

After the handover timing information is notified from the mobile switching center 27, the base station 23 and the mobile station 16 resume transmission and reception of communication data using the new guard time (P28, 29).

As can be seen from the above, according to Embodiment 3, when the mobile station 16 stores the location, the mobile switching center 27 is configured to store the transmission rate of the mobile station 16 and store the transmission speed switching time of the mobile station 16 at the same time, so , can achieve the effect that the mobile switching center 27 can quickly change the communication data transmission speed or the protection time according to the need.

In addition, in the above-mentioned Embodiment 3, it also shows the case of requesting to change the TDMA protection time as the transmission speed changes. Specifically, one case is when the moving speed is within the walking speed range (for example, the speed per hour When it is below 4km), if it is detected that the moving speed has exceeded the walking speed range, the vehicle speed information indicating this situation will be notified to the mobile switching center through the base station, thereby requesting to change the protection time, and another situation is that when moving When speed is in the range of vehicle speed (for example, speed per hour is more than 4km), if it is detected that the speed of movement drops below the range of vehicle speed, then the vehicle speed removal information indicating this situation will be notified to the Mobile Switching Center by the base station, Thus requesting to change the guard time.

Then, the automobile traveling speed information or the automobile traveling speed release information are stored in the mobile station information memory 35 of the mobile switching center 27, and when storing the automobile traveling speed information or the automobile traveling speed releasing information in the mobile station information memory 35, The mode setting processor 38 changes the time slot so that the guard time of the data communication channel is suitable for the walking speed or the driving speed of the car. Embodiment 4

Fig. 10 is a flow chart showing transmission in the mobile communication system according to Embodiment 4 of the present invention.

Hereinafter, the operation will be described.

First, as in the above first embodiment, a data communication channel is set between the mobile station 16 and the base station 23 by sending a data transmission request from the mobile station 16, and the transmission and reception of communication data starts (in this embodiment 4, referred to as The mobile station 16 will be described as an example).

However, in Embodiment 4, when the mobile station 16 requests the database 11 to send data (P31), the database 11 notifies the mobile switching center 27 of the data volume of the communication data, and requests the mobile switching center 27 to provide the mobile station 16 executable Information on the maximum transmission speed (P32).

Then, since the maximum transmission rate is determined by the transmission performance of the mobile station 16 and the state of the current empty data communication channel, the mobile switching center 27 refers to the transmission rate of the mobile station 16 stored in the mobile station information memory 35, and simultaneously Confirm the state of the current empty data communication channel to determine the maximum transmission speed that can actually be transmitted.

Next, when the transmission of the communication data is started at the maximum transmission speed that can actually be transmitted, the mobile switching center 27 judges whether the data amount notified by the database 11 can be transmitted within a certain period of time, and when it is judged that it is impossible to transmit the data within a certain period of time In the case of internal transmission, the transmission of the communication data is rejected, and the mobile station 16 and the database 11 are notified of this fact.

On the other hand, when it is determined that transmission is possible within a certain period of time, the database 11, base station 23, and mobile station 16 are notified of information indicating the maximum transmission rate (P33, P34, P35).

Then, when the mobile station 16 notifies the mobile switching center 27 and the database 11 of the ACK signal confirming the change to the maximum transmission speed (P36, P37), the mobile switching center 27 executes switching of the communication data transmission speed in the same manner as in the third embodiment. treatment (P38).

After the mobile switching center 27 switches the communication data transmission speed, the database 11 transmits the communication data to the mobile station 16 at the transmission speed (P39).

Next, when the mobile station 16 transmits a large amount of data to the database 11, the mobile station 16 transmits a data transmission request including the amount of communication data to the mobile switching center 27 and the database 11 (P40, P41).

Then, the mobile switching center 27 refers to the transmission rate of the mobile station 16 stored in the mobile station information memory 35, and confirms the state of the current empty data communication channel to determine the maximum transmission rate that can actually be transmitted.

Next, when the transmission of the communication data is started at the maximum transmission speed that can actually be transmitted, the mobile switching center 27 judges whether the data amount notified by the mobile station 16 can be transmitted within a certain period of time, and when it is judged that it is impossible to transmit within a certain period of time, When the transmission is within the time, the transmission of the communication data is rejected, and the mobile station 16 and the database 11 are notified of this fact.

On the other hand, when it is determined that transmission is possible within a certain period of time, the database 11, base station 23, and mobile station 16 are notified of information indicating the maximum transmission rate (P42, P43, P44).

When the mobile switching center 27 and the mobile station 16 are notified of the ACK signal confirming the change to the maximum transmission speed from the database 11 (P45, P46), the mobile switching center 27 executes the process of switching the communication data transmission speed in the same way as in the third embodiment. (P47).

After the mobile switching center 27 switches the communication data transmission speed, the mobile station 16 transmits the communication data to the database 11 at the transmission speed (P48).

As can be seen from the above, according to the present embodiment 4, when sending communication data from the database 11 etc. to the mobile station 16 etc., the database 11 etc. need to notify the mobile switching center 27 of the data volume of the communication data, so the mobile switching center 27 can As a result of grasping the amount of communication data, there is an effect that when the database 11 and the like transmit a large amount of communication data, it is possible to determine whether the mobile station 16 and the like can reliably receive the large amount of communication data.

In addition, when the transmission of communication data is started at the maximum transmission speed, it may be judged whether or not the amount of data notified by the database 11 can be transmitted within a certain period of time, and when it is determined that transmission within a certain period of time is impossible, the transmission of the communication data is rejected, Therefore, there is also an effect that reception errors of communication data can be avoided.

In Embodiment 4, the case where the communication data is transferred from the database 11 to the mobile station 16 and the case where the communication data is transferred from the mobile station 16 to the database 11 are shown, but when the communication data is transferred from the database 11 to another database, or It is also applicable to the transmission of communication data from the mobile station 16 to other mobile stations, and the same effect can be obtained. Embodiment 5

Fig. 11 is a flow chart showing transmission in the mobile communication system according to Embodiment 5 of the present invention, and Fig. 12 is a flow chart showing a confirmation procedure before handover.

Hereinafter, the operation will be described.

In the fifth embodiment, for example, the processing when the mobile station 16 moves from the coverage area 24a of the base station 24 to the radio coverage area 23a of the base station 23 and performs handover will be described.

First, when a handover request is sent from the mobile station 16 or the base station 24 (step ST11), the mobile switching center 27 instructs the mobile station 16 to check the radio waves transmitted from all the base stations 23 and 25 adjacent to the base station 24 currently connected. The electric field strength is detected and notified to the mobile switching center 27 of the electric field strength (step ST12).

Then, when the mobile switching center 27 receives from the mobile station 16 the electric field strengths of the radio waves emitted by the adjacent base stations 23 and 25, it compares the electric field strengths with each other, and decides to hand over the base station that emits the electric waves with the highest electric field strength. Target base station (step ST13). However, for the convenience of description, the base station 23 is determined as the handover target base station as an example for description below.

After determining the handover target base station, the mode setting processor 38 of the mobile switching center 27 refers to the storage content of the mobile station information memory 35, and selects the mobile station 16 from the empty data communication channels of the base station 23 as the handover target base station. The data communication channel that realizes the maximum transmission speed within the range of the executable maximum transmission speed (step ST14).

Next, compare the transmission rate before the handover with the transmission rate after the handover (step ST15). Before switching the transmission rate, handover of the mobile station 16 is performed (P54). On the other hand, the case where the transmission speed before handover is high will be described in Embodiment 6.

After carrying out the handover of mobile station 16 in the above way, the mode setting processor 38 of mobile switching center 27 confirms again the empty data communication channel, and selects the data communication channel in the same way, and simultaneously sets the maximum transmission speed Notify the base station 23 and the mobile station 16 of the information (P55, P56).

In addition, after the mobile switching center 27 notifies the base station 23 and the mobile station 16 of the information of the maximum transmission speed, it also counts the time with the sending time of the notification as the starting point, and when the time arrives, it is stored in the mobile station information memory 35. When the speed switching time is within 10 minutes, the base station 23 and the mobile station 16 are notified of the switching timing information (P58, P59).

Next, after the handover timing information is notified from the mobile switching center 27, the base station 23 and the mobile station 16 start transmission and reception of communication data at a transmission rate corresponding to the previously notified maximum transmission rate information (P60, P61).

As can be seen from the above, according to Embodiment 5, since the data communication channel that can realize the maximum transmission rate within the range of the maximum transmission rate executable by the mobile station 16 is selected from the empty data communication channels of the handover target base station, each time When the handover of the mobile station 16 is performed, the transmission speed of communication data can be optimized.

In addition, when the transmission rate becomes faster after the handover of the mobile station, the handover is performed before the transmission rate is changed, so that the handover of the mobile station 16 can be quickly performed. Embodiment 6

In Embodiment 5 above, the case where the transmission speed becomes faster after handover is shown, however, as shown in FIG. Perform handover.

Therefore, it is possible to prevent disconnection of the radio connection that occurs with the handover of the mobile station 16 . Implementation form 7

Fig. 14 is a flow chart showing transmission in the mobile communication system according to Embodiment 7 of the present invention, and Fig. 15 is a flow chart showing a transmission power confirmation process.

Hereinafter, the operation will be described.

In Embodiment 5 above, the case where the transmission rate is changed immediately after handover is shown, but, for example, in order to double the transmission rate, it is necessary to double the transmission power of the transmitting side apparatus (in decibels). Indicates that it is an increase of 3 decibels), so as shown in FIG. 14, the transmission power can be confirmed after the handover is performed.

For example, when transmitting and receiving communication data between the mobile station 16 and the base station 23 (step ST21), the mobile switching center 27 judges whether there is an empty data communication higher than the current transmission speed in the cell currently in communication. channel (step ST22).

When there is no vacant channel, this process ends, but when there is vacant channel (step ST23), mobile switching center 27 judges whether mobile station 16 and database 11 can carry out speed higher than current by referring to mobile station information memory 35 etc. Communication (step ST24).

Next, when the mobile switching center 27 determines that high-speed communication is possible, if the mobile station 16 is the receiving party, it confirms the transmission power of the base station 23 by confirming the reception power of the mobile station 16, and judges whether there is a margin in the transmission power (step ST24).

On the other hand, if the base station 23 is the receiver, the transmission power of the mobile station 16 is checked by checking the reception power of the base station 23, and it is judged whether there is room for transmission power (step ST24).

When judging that the transmission power has a surplus (step ST27), the mobile switching center 27 immediately executes the switching of the transmission speed (step ST28), and when judging that the transmission power does not have a surplus (step ST27), it will increase the instruction notification of the transmission power level The mobile station 16 (or base station 23) on the sending side notifies the base station 23 (or mobile station 16) on the receiving side of the indication that the received power should be notified at the same time.

Thus, it is judged whether or not a margin of transmission power can be secured to adapt to the change of the transmission rate after the increase of the received power, and the switching of the transmission rate is performed only when the margin can be secured, and the switching of the transmission rate is stopped when the margin cannot be secured.

As can be seen from the above, according to Embodiment 7, when the increase in transmission power is sufficient to adapt to the speed change of the transmission speed, the change of the transmission speed is allowed, but when the increase of the transmission power cannot adapt to the speed change of the transmission speed, It is possible to prevent the occurrence of useless processing which still tries to increase the transmission speed, and at the same time, prevent the occurrence of communication abnormality accompanying such a useless process.

Industrial applicability

As described above, in the mobile communication system of the present invention, when setting an asymmetrical data communication channel in which the transmission rate of communication data transmitted from the mobile station to the database is different from the transmission rate of communication data transmitted from the database to the mobile station, Wireless communication suitable for creating multimedia in which the amount of data changes over time.

Claims (50)

1. mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: above-mentioned mobile switching centre, and according to the request from above-mentioned travelling carriage or communicator, change is from the transmission speed of this travelling carriage to the communication data of communicator transmission;

Each travelling carriage was specified until the transmission speed change time to the elapsed time of changing transmission speed;

Behind transmission speed change effluxion, carry out the change of transmission speed to each travelling carriage appointment.

2. mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: above-mentioned mobile switching centre, and according to the request from above-mentioned travelling carriage or communicator, change is from the transmission speed of this communicator to the communication data of travelling carriage transmission;

Each travelling carriage was specified until the transmission speed change time to the elapsed time of changing transmission speed;

Behind transmission speed change effluxion, carry out the change of transmission speed to each travelling carriage appointment.

3. mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: above-mentioned mobile switching centre, according to request, change independently respectively from this travelling carriage to the communication data of communicator transmission or from the transmission speed of this communicator to the communication data of travelling carriage transmission from above-mentioned travelling carriage or communicator;

Each travelling carriage was specified until the transmission speed change time to the elapsed time of changing transmission speed;

Behind transmission speed change effluxion, carry out the change of transmission speed to each travelling carriage appointment.

4. according to any one the described mobile communication system in the claim 1～3, it is characterized in that:, be the speed that belongs to the high speed data transfer scope by mobile switching centre's transmission speed after changing.

5. according to any one the described mobile communication system in the claim 1～3, it is characterized in that:, be the speed that belongs to the medium speed data transmission range by mobile switching centre's transmission speed after changing.

6. according to any one the described mobile communication system in the claim 1～3, it is characterized in that:, be the speed that belongs to the low speed data transmission range by mobile switching centre's transmission speed after changing.

7. mobile communication system according to claim 6 is characterized in that: in the low speed data transmission range, comprise the interruption transfer of data.

8. mobile communication system according to claim 4 is characterized in that: the transmission means of high speed data transfer is TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.

9. mobile communication system according to claim 5 is characterized in that: the transmission means of medium speed data transmission is TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.

10. mobile communication system according to claim 6 is characterized in that: the transmission means of low speed data transmission is TDMA/TDD mode, TDMA/FDD mode, Time Division-Code Division Multiple Access/TDD mode, Time Division-Code Division Multiple Access/FDD mode or CDMA/TDD mode.

11. according to any one the described mobile communication system in the claim 1～3, it is characterized in that: be provided with the transfering state processor controls in mobile switching centre, a plurality of when sending the travelling carriage of received communication data when existing by the base station, be used to manage the state transitions of the transmission speed of each travelling carriage.

12. according to any one the described mobile communication system in the claim 1～3, it is characterized in that: be provided with the priority processor controls in mobile switching centre, be used to manage the alter operation of the transmission speed of the setting operation of data communication channel of mobile switching centre and mobile switching centre.

13. a mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: each travelling carriage was specified until the transmission speed change time to the elapsed time of changing transmission speed; Above-mentioned mobile switching centre when above-mentioned travelling carriage carries out the position login, stores the information of the accessible transmission speed of this travelling carriage, the transmission speed switching time of storing this travelling carriage simultaneously.

14. mobile communication system according to claim 13 is characterized in that: be provided with information-storing device in mobile switching centre, be used for the accessible transmission speed of storing mobile station, store the transmission speed switching time of this travelling carriage simultaneously.

15. mobile communication system according to claim 14, it is characterized in that: when travelling carriage and communicator begin the transmission of communication data, mobile switching centre, in the accessible transmission speed of travelling carriage, select the maximum transfer speed that the current data communication channel can be allowed, and will indicate the transfer rate information informing base station and the travelling carriage of this transmission speed.

16. mobile communication system according to claim 15, it is characterized in that: mobile switching centre, after with transfer rate information informing base station and travelling carriage, when having passed through transmission speed during switching time that is stored in the travelling carriage in the information-storing device, will instruction switch the switching timing information informing base station and the travelling carriage of transmission speed.

17. mobile communication system according to claim 16, it is characterized in that: base station and travelling carriage, after receiving the switching timing notification of information from mobile switching centre, the time slot the initial frame after receiving this notice begins to begin with new transmission speed the transmission reception of communication data.

18. mobile communication system according to claim 13, it is characterized in that: travelling carriage, when in the scope of translational speed at walking speed, as detect this translational speed and surpassed the walking speed scope, then will indicate the automobile driving speed information of this situation to notify mobile switching centre by the base station.

19. mobile communication system according to claim 13, it is characterized in that: travelling carriage, when in the scope of translational speed at automobile driving speed, as detect this translational speed and be reduced to below the automobile driving speed scope, then will indicate the automobile driving speed of this situation to remove information and notify mobile switching centre by the base station.

20. mobile communication system according to claim 18 is characterized in that: be provided with information-storing device in mobile switching centre,, be used to store this automobile driving speed information when travelling carriage is notified automobile driving speed information by the base station.

21. mobile communication system according to claim 19 is characterized in that: be provided with information-storing device in mobile switching centre,, be used to store this automobile driving speed and remove information when travelling carriage is removed automobile driving speed information and notified by the base station.

22. mobile communication system according to claim 20; it is characterized in that: be provided with mode in mobile switching centre and set processor; when in information-storing device stored automobile driving speed information, be used to change time slot so that the guard time of data communication channel is suitable for automobile driving speed.

23. mobile communication system according to claim 21; it is characterized in that: be provided with mode in mobile switching centre and set processor; when when information-storing device stored automobile driving speed is removed information, be used to change time slot so that the guard time of data communication channel is suitable for walking speed.

24. a mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: when from above-mentioned communicator when travelling carriage transmits communication data, this communicator is with the data volume notice mobile switching centre of communication data.

25. a mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: when from above-mentioned travelling carriage when communicator sends communication data, this travelling carriage is with the data volume notice mobile switching centre of communication data.

26. a mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: when from above-mentioned communicator or travelling carriage when other communicators or other travelling carriages send communication data, send the communicator of communication data or travelling carriage data volume notice mobile switching centre with communication data.

27. mobile communication system according to claim 24, it is characterized in that: mobile switching centre, state according to executable maximum transfer speed of travelling carriage and current empty data communication channel is judged the actual maximum transfer speed of transmitting, simultaneously, when beginning the transport communication data with this maximum transfer speed, judging whether can be at certain hour with the data volume of interior transmission from the communicator notice, and can not be at certain hour during with interior transmission when being judged as, the transmission of refusal communication data.

28. mobile communication system according to claim 25, it is characterized in that: mobile switching centre, state according to executable maximum transfer speed of travelling carriage and current empty data communication channel is judged the actual maximum transfer speed of transmitting, simultaneously, when beginning the transport communication data with this maximum transfer speed, judging whether can be at certain hour with the data volume of interior transmission from travelling carriage notice, and can not during with interior transmission, refuse the transmission of communication data at certain hour when being judged as.

29. mobile communication system according to claim 26, it is characterized in that: mobile switching centre, state according to executable maximum transfer speed of travelling carriage and current empty data communication channel is judged the actual maximum transfer speed of transmitting, simultaneously, when beginning the transport communication data with this maximum transfer speed, judge whether can be at certain hour with interior transmission from the communicator that transmits communication data or the data volume of travelling carriage notice, and can not be at certain hour during with interior transmission when being judged as, the transmission of refusal communication data.

30. a mobile communication system has: the base station exchanges the required control information of radio communication mutually by control channel and the travelling carriage that belongs in the wireless coverage area; And mobile switching centre, receive the required control information of data communication from the communicator that is connected with public network, receive the control information that sends from above-mentioned travelling carriage by above-mentioned base station simultaneously, and be set in the transmission speed that sends the communication data that receives between this travelling carriage and the communicator according to the control information of two aspects; This mobile communication system is characterised in that: when carrying out the handover of above-mentioned travelling carriage, above-mentioned mobile switching centre is according to this travelling carriage of Status Change of the empty data communication channel of handover-target base station and the transmission speed between the base station; And

Each travelling carriage was specified until the transmission speed change time to the elapsed time of changing transmission speed;

Behind transmission speed change effluxion, carry out the change of transmission speed to each travelling carriage appointment.

31. mobile communication system according to claim 30 is characterized in that: mobile switching centre, before the handover that carries out travelling carriage, determine handover-target base station, judge the state of the empty data communication channel of handover-target base station simultaneously.

32. mobile communication system according to claim 31 is characterized in that: travelling carriage, detect from current the connection the electric field strength of electric wave of all base station of base station adjacency, and this electric field strength circulated a notice of to mobile switching centre.

33. mobile communication system according to claim 32 is characterized in that: travelling carriage, when receiving indication from mobile switching centre, electric field strength is circulated a notice of to mobile switching centre.

34. mobile communication system according to claim 32 is characterized in that: travelling carriage, when receiving indication from the base station, electric field strength is circulated a notice of to mobile switching centre.

35. mobile communication system according to claim 32 is characterized in that: mobile switching centre will compare mutually from the electric field strength of the electric wave of each base station, and the base station decision that will launch the electric wave of electric field strength maximum is handover-target base station.

36. mobile communication system according to claim 31, it is characterized in that: mobile switching centre, the selected data communication channel that can in the executable maximum transfer speed scope of travelling carriage, realize maximum transfer speed in the empty data communication channel of handover-target base station.

37. mobile communication system according to claim 36 is characterized in that: mobile switching centre, under the situation that transmission speed accelerates behind the handover that carries out travelling carriage, carried out handover before the change transmission speed.

38. mobile communication system according to claim 36 is characterized in that: mobile switching centre, under the situation of transmission speed step-down behind the handover that carries out travelling carriage, carry out handover after the change transmission speed.

39. according to claim 1 or 3 described mobile communication system, it is characterized in that: mobile switching centre when the transmission speed of the communication data of accelerating to transmit to communicator from travelling carriage, makes transmission speed confirm the transmitted power of travelling carriage before accelerating.

40. according to claim 2 or 3 described mobile communication system, it is characterized in that: mobile switching centre when the transmission speed of the communication data of accelerating to transmit to travelling carriage from communicator, makes transmission speed confirm the transmitted power of base station before accelerating.

41., it is characterized in that according to the described mobile communication system of claim 39: mobile switching centre, confirm the transmitted power of travelling carriage by the received power of confirming the base station.

42., it is characterized in that according to the described mobile communication system of claim 40: mobile switching centre, confirm the transmitted power of base station by the received power of confirming travelling carriage.

43., it is characterized in that according to the described mobile communication system of claim 39: mobile switching centre, should improve the indication of transmission power level and notify travelling carriage, should circulate a notice of the indication informing base station of received power simultaneously.

44., it is characterized in that according to the described mobile communication system of claim 40: mobile switching centre, should improve the indication informing base station of transmission power level, should circulate a notice of the indication notice travelling carriage of received power simultaneously.

45., it is characterized in that according to the described mobile communication system of claim 43: mobile switching centre, when the increase of the transmitted power of travelling carriage can not adapt to the speed change of transmission speed, the change of refusal transmission speed.

46., it is characterized in that according to the described mobile communication system of claim 44: mobile switching centre, when the increase of the transmitted power of base station can not adapt to the speed change of transmission speed, the change of refusal transmission speed.

47. according to the described mobile communication system of claim 43, it is characterized in that: mobile switching centre when the increase of the transmitted power of travelling carriage can adapt to the speed change of transmission speed, allows the change of transmission speed.

48. according to the described mobile communication system of claim 44, it is characterized in that: mobile switching centre when the increase of the transmitted power of base station can adapt to the speed change of transmission speed, allows the change of transmission speed.

49. according to the described mobile communication system of claim 43, it is characterized in that: mobile switching centre when transmission speed is doubled, should make transmitted power improve 3 decibels indication notice travelling carriage.

50. according to the described mobile communication system of claim 44, it is characterized in that: mobile switching centre when transmission speed is doubled, should make transmitted power improve 3 decibels indication informing base station.

Images