Channel assignment method and connection control station

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a channel allocation method and a connection control station when a base station and a plurality of telephone terminal stations communicate with each other via multiple lines, and is suitable for application to a cellular system.

【0002】

[Conventional technology]

There are multiple base stations and wireless telephone systems such as automobile telephone systems and PDCs (Personal Digital Cellular telecommunication systems) known as analog cellular systems and digital cellular systems, and personal handyphone systems (PHS). It is designed to communicate with the personal handy-phone terminal station of the system via a personal handy-phone system (TDMA). A base station is assigned a band with a unique frequency that does not interfere with adjacent base stations, and a line consisting of this band is used as multiple time division multiplexing (TDMA) lines for multiple telephone terminals. Allows the station and base station to communicate.

【0003】

A conventional mode of channel allocation when a base station and a mobile phone, which is a telephone terminal station, communicate with each other will be described with reference to FIG. FIG. 8 shows the time-division transmission / reception channels assigned to each mobile phone when the base station and the mobile phones 1a to 1c communicate with each other, and the time-division transmission / reception channels used by the base station. The aspect is shown. The transmission (downlink) channel from the base station to the mobile phone and the reception (uplink) channel from the mobile phone of the base station are time-divisioned into four channels, which are CH1 to CH4. There is. For example, when three mobile phones 1a, 1b, and 1c are communicating with a base station, CH1 is assigned to the mobile phone 1a, and the downlink channel of CH1 is transmitted to the mobile phone 1a, and the uplink channel of CH1 is transmitted. Is assigned to receive from mobile phone 1a, CH2 is assigned to mobile phone 1b, the downlink channel of CH2 is assigned to transmit to mobile phone 1b, and the uplink channel of CH2 is assigned to receive from mobile phone 1b. CH3 is assigned to 1c, and the downlink channel of CH3 is assigned to transmission to mobile phone 1c, and the uplink channel of CH3 is assigned to reception from mobile phone 1c. That is, as shown in the figure, the mobile phone 1a can transmit and receive by the base station and CH1, the mobile phone 1b can transmit and receive by the base station and CH2, and the mobile phone 1c can transmit and receive by the base station and CH3. Will be.

【0004】

[Problems to be Solved by the Invention]

As described above, in the conventional cellular system, when the mobile phone communicates, one channel consisting of an uplink channel and a downlink channel is exclusively assigned to each mobile phone for communication. Therefore, if the number of multiple lines between the base station and the mobile phone is set to 4 channels as shown in Fig. 8, when the number of mobile phones requesting communication exceeds 4, the exceeded mobile phone will be the base. You will not be able to communicate with the station. That is, there is a problem that call loss occurs. In particular, recently, information distribution such as weather forecasts and news and data distribution such as music data for ringtones have been actively performed, and the frequency of call losses is increasing.

【0005】

Therefore, an object of the present invention is to provide a channel allocation method and a connection control station that enable efficient data transmission by improving the line utilization rate.

【0006】

[Means for solving problems]

In order to achieve the above object, the channel allocation method of the present invention allocates channels in a telephone network consisting of a plurality of telephone terminal stations and a connection control station that controls the connection of the telephone terminal stations connected via multiple lines. In this method, when two or more telephone terminal stations request connection for the same content within a predetermined time, one channel of the multiple lines is assigned to the two or more telephone terminal stations and the above. The connection control station is connected, and the data of the content is simultaneously transmitted from the connection control station to the two or more telephone terminal stations by the assigned downlink channel of one channel.

【0007】

Further, another channel allocation method of the present invention capable of achieving the above object is a telephone consisting of a plurality of telephone terminal stations and a connection control station that controls the connection of the telephone terminal stations connected via multiple lines. It is a channel allocation method in the network, and when a connection request for a content request is made from a telephone terminal station, one channel in the multiple lines is allocated to connect the telephone terminal station and the connection control station. The data of the content is transmitted from the connection control station to the telephone terminal station by the assigned downlink channel of one channel, and while the data of the content is being transmitted, another telephone terminal station requests the same content as the content. When a connection request is made, the one channel assigned to the telephone terminal station is also assigned to the other telephone terminal station, and the telephone terminal station, the other telephone terminal station, and the connection control station are connected to each other. The data of the content is simultaneously transmitted from the connection control station to the telephone terminal station and the other telephone terminal station by the downlink of the assigned one channel.

【0008】

Further, in the channel allocation method of the present invention, after the transmission of the content data to the telephone terminal station is completed, the remaining data of the content is transmitted to the other telephone terminal station. May be good. Furthermore, in the channel allocation method of the present invention, the allocated channel may be a multicast line reserved in advance for content transmission. Furthermore, in the channel allocation method of the present invention, the allocated 1-channel uplink channel is received by the allocated 1-channel downlink channel every integral multiple of the frame of the multiplex line. It may be sequentially assigned to the telephone terminal station. Furthermore, in the channel allocation method of the present invention, the allocated 1-channel uplink channel is time-divided and assigned to each of the telephone terminal stations receiving on the allocated 1-channel downlink channel. May be good.

【0009】

The connection control station of the present invention capable of achieving the above object is a connection control station that controls the connection of a plurality of the telephone terminal stations connected via multiple lines, and is a connection received from the telephone terminal station. According to the connection request signal detection means that determines whether the request signal is a normal call request or a content request and outputs the channel allocation information according to the request, and the channel allocation information from the connection request signal detection means. The connection request signal detecting means includes a channel allocating means for allocating a channel of the multiple lines to the telephone terminal station that issued the connection request signal and a control means for controlling the connection with a higher-level line. When a connection request for the same content request is detected from two or more telephone terminal stations within a predetermined time, the channel allocation means performs the multiplexing according to the channel allocation information output by the connection request signal detection means at this time. One channel in the line is assigned to the two or more telephone terminal stations, and the requested content data fetched from the higher-level line by the control means is transferred to the assigned one channel through the downlink channel. It is trying to transmit to two or more telephone terminal stations at the same time.

【0010】

Further, another connection control station of the present invention capable of achieving the above object is a connection control station that controls the connection of a plurality of the telephone terminal stations connected via multiple lines, and is the telephone terminal station. A connection request signal detection means that determines whether the connection request signal received from is a normal call request or a content request and outputs channel allocation information according to the request, and channel allocation from the connection request signal detection means. According to the information, the connection request is provided with a channel allocation means for allocating a channel of the multiple lines to a telephone terminal station that has issued the connection request signal and a control means for controlling the connection with a higher-level line. According to the channel allocation information output when the signal detecting means detects the connection request of the content request from the telephone terminal station, the channel allocation means allocates one channel of the multiple lines to the telephone terminal station, and the above. The requested content data fetched from the upper line by the control means is transmitted to the telephone terminal station via the assigned one downlink channel, and the content data is transmitted. When the connection request signal detecting means detects a connection request for a request of the same content as the content from another telephone terminal station, the connection request signal detecting means is described according to the channel allocation information output by the connection request signal detecting means at this time. The one channel assigned to the telephone terminal station by the channel allocation means is also allocated to the other telephone terminal station, and the data of the requested content fetched from the higher-level line by the control means is assigned. A single downlink channel is used to simultaneously transmit to the telephone terminal station and the other telephone terminal station.

【0011】

According to the present invention, when transmitting the same content data to two or more telephone terminal stations, one downlink channel is assigned and the same content is transmitted to two or more telephone terminal stations at the same time. Data can be transmitted by connecting two or more telephone terminal stations and a base station, which is a connection control station, by means of channels. As a result, the line utilization rate can be improved, and the occurrence of call loss can be prevented as much as possible. Further, according to another invention, if a request for the same content occurs during transmission of content data, one downlink channel is assigned to all the requested telephone terminal stations and the same content data is assigned. Is transmitted. Therefore, since data can be transmitted by connecting two or more telephone terminal stations and a base station which is a connection control station by one channel, the line utilization rate can be improved and call loss occurs. Can be prevented as much as possible.

【0012】

Further, as the upstream channel assigned to the telephone terminal station at the time of requesting the content, it is sequentially assigned to the telephone terminal station at intervals of an integral multiple of the frame cycle. Alternatively, the uplink channel of the assigned channel is time-divisioned so that each divided channel is assigned to all the requested telephone terminal stations. In this way, even if a low-speed uplink channel is assigned, the data transmitted from the telephone terminal station can be sufficiently transmitted because the request change is the main data.

【0013】

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a schematic configuration of a cellular system to which the channel allocation method of the present invention can be applied. In a cellular system, a small zone method is generally adopted, and a large number of wireless zones are arranged in a service area. A base station manages each of these wireless zones, and when a mobile phone, which is a mobile station, makes a call with a general telephone, the mobile exchange station manages the wireless zone to which the mobile phone belongs. It will be connected to the general telephone network from the mobile exchange. As a result, the mobile phone can make a call with another telephone by being connected to the base station that manages each wireless zone via a wireless line.

【0014】

An example of such a cellular system is shown in FIG. 1, which shows a case where mobile phones 1a to 1d belong to a radio zone managed by base station 2c among base stations 2a to 2d. There is. The mobile phones 1a to 1d and the base station 2c are connected by a time division multiplexing (TDMA) wireless line, and an uplink signal for making a call or registering a location transmitted from the mobile phones 1a to 1d. Is received and processed by base station 2c. In addition, the call signal from the other party's telephone terminal station, which is the downlink signal transmitted from the base station 2c, and the data for download are received by the source mobile phones 1a to 1d. Base station 2a to base station 2d manage different radio zones, but the peripheral edges of the radio zones may overlap each other. Base stations 2a to 2d are connected to mobile exchange 3 via a multiplexing line, and a plurality of mobile exchanges 3 are concentrated at barrier exchange 4 and connected to general telephone exchange 5a. A plurality of barrier exchange stations 4 are connected to each other by a relay transmission line. General telephone exchanges 5a, 5b, 5c ... Are installed in each area, and general telephone exchanges 5a, 5b, 5c ... are also connected to each other by relay transmission lines. A large number of general telephones are connected to each of the general telephone exchanges 5a, 5b, 5c ... For example, the download center 6 and the content distribution center 7 are connected to the general telephone exchange 5a.

【0015】

The download center 6 is provided with a music database (music DB) in which new songs are added at any time and a large amount of music data is accumulated. In the present invention, the download center 6 connected to a general telephone network can be used as a mobile phone. Music data can be downloaded to telephones 1a to 1d and other telephone terminal stations. Furthermore, the latest weather forecasts, news, etc. that are updated from time to time are accumulated in the content distribution center 7, and these contents can be transferred from the content distribution center 7 connected to the general telephone network to mobile phones 1a to 1d. It is designed so that it can be distributed to other telephone terminal stations. For example, when the mobile phone 1a downloads the music data, the mobile phone 1a calls the telephone number of the download center 6. As a result, the route between the download center 6 and the mobile phone 1 is the route of the mobile phone 1a-base station 2c-mobile exchange 3-barrier exchange 4-general telephone exchange 5b-general telephone exchange 5a-download center 6. Is connected. Next, the mobile phone 1a can download the music data of the desired music title from the music DB by operating the dial buttons or the like according to the menu displayed on the display. In this case, the music data is composed of musical score data and timbre data. In addition, the weather forecast and news can be distributed from the content distribution center 7 to the mobile phone 1a by the same method as described above.

【0016】

The mobile phones 1a to 1d shown in FIG. 1 have the same configuration, and an example of the configuration is shown in FIG. In FIG. 2, the mobile phone 1 includes an antenna 25 that is generally retractable, and the antenna 25 is connected to a communication unit 13 having a modulation / demodulation function. The central processing unit (CPU) 10 for the system is a system control unit that controls the operation of each part of the mobile phone 1 by executing a telephone function program, and indicates or specifies the elapsed time during operation. It is equipped with a timer that generates a timer interrupt at the time interval of. RAM 11 is a RAM (Random Access Memory) in which a music data storage area composed of musical score data and timbre data downloaded from the download center 6, a user setting data storage area, a work area of the CPU 10 and the like are set. The ROM 12 is a ROM (Read Only Memory) in which programs such as various telephone function programs for transmission and incoming calls executed by the CPU 10 and various data such as preset score data and tone color data are stored.

【0017】

Further, the communication unit 13 demodulates the signal transmitted from the base station 2 and received by the antenna 25, modulates the signal transmitted to the base station 2, and transmits the signal from the antenna 25. The received signal demodulated by the communication unit 13 is decoded by the voice processing unit (coder / decoder) 14, and the transmitted signal input from the microphone 21 is compressed and coded by the voice processing unit 14. The voice processing unit 14 encodes / decodes the voice for transmission with high efficiency, and is, for example, a CELP (Code Excited LPC) system or an ADPCM (adaptive differential PCM coding) type coder / decoder. The music reproduction unit 15 emits a received signal from the voice processing unit 14 from the receiving speaker 22, reproduces music data, and outputs it as a ringtone / hold sound. The ring tone is emitted from the incoming speaker 23, and the hold tone is emitted from the receiving speaker 22.

【0018】

Further, when the music reproduction unit 15 reproduces the music data, the CPU 10 reads the music data stored in the RAM 11 or the ROM 12 and transfers the music data to the music reproduction unit 15. The interface (I / F) 16 is an interface for downloading music data or the like composed of musical score data and timbre data from an external device 20 such as a personal computer. The input unit 17 is an input means including a numeric keypad of "0" to "9" and a jog dial provided in the mobile phone 1. The display unit 18 is a display unit that displays a menu of telephone functions and a display according to the operation of buttons such as a numeric keypad and a jog dial. The vibrator 19 is a vibrator that notifies the user of an incoming call by vibrating the main body of the mobile phone 1 instead of the ring tone when receiving an incoming call. Each functional block exchanges data and commands via the bus 24.

【0019】

Next, a first embodiment of the channel allocation method of the present invention executed in the cellular system shown in FIG. 1 will be described with reference to FIG. FIG. 3 shows the time-division transmission / reception channels assigned to each mobile phone when the base station 2c shown in FIG. 1 and the mobile phones 1a to 1d communicate with each other, and the time-division used by the base station 2c. The mode of the transmitted / received channel is shown. Figure 3 shows the channel allocation when the time-division-multiplexed wireless line between the base station 2c and the mobile phones 1a to 1d is composed of 4 channels, and 1 frame is 4 channels. .. That is, one frame is time-divisioned into four for the transmission (downlink) channel from the base station 2c to the mobile phones 1a to 1d and the reception (uplink) channel from the mobile phones 1a to 1d of the base station 2c. There are 4 channels, CH1 to CH4. In Fig. 3, three mobile phones 1a, 1b, and 1c are communicating with the base station 2c, and the same music data is requested and downloaded from the download center 6, or the same data is downloaded from the content distribution center 7. The channel allocation when the data is distributed by requesting is shown.

【0020】

In this way, when data of the same content (hereinafter, the content includes music data) is requested and the data is transferred, CH1 of the downlink channel in the base station 2c is shared as shown in the figure. It is assigned as a transmission channel to three mobile phones 1a to 1c, and CH1 (subchannel 1) of frame 1 every 4 frame cycles of the uplink channel.₁) Is assigned to the transmission channel from the mobile phone 1a to the base station 2c, and CH1 (subchannel 1) of frame 2 every 4 frame cycles of the uplink channel₂) Is assigned to the transmission channel from the mobile phone 1b to the base station 2c, and CH1 (subchannel 1) of frame 3 every 4 frame cycles of the uplink channel.₃) Is assigned to the transmission channel from the mobile phone 1c to the base station 2c.

【0021】

That is, as shown in the figure, the three mobile phones 1a to 1c and the base station 2c share CH1 of the four multiplexed channels, so that the base station 2c transmits the same content data on the downlink channel. doing. By receiving the assigned CH1, the three mobile phones 1a to 1c can each receive the same content data transmitted from the base station 2c. Then, the three mobile phones 1a to 1c have subchannels 1 of upstream CH1 every 4 frame cycles with different timings.₁~1₃Can be assigned and transmitted to base station 2c. As a result, the three mobile phones 1a to 1c can transmit and receive to each other by using only one channel of the base station 2c and CH1, and the line utilization rate can be improved. When transferring content data to three mobile phones 1a to 1c, the information transmitted from each of the mobile phones 1a to 1c is information such as content changes, so the assigned transmission channel is slow. It will be possible to sufficiently transmit even the channel of.

【0022】

Next, a second embodiment of the channel allocation method of the present invention executed in the cellular system shown in FIG. 1 will be described with reference to FIG. However, FIG. 4 shows the time-division transmission / reception channels assigned to each mobile phone when the base station 2c and the mobile phones 1a to 1d communicate with each other, and the time-division transmission used by the base station 2c. / Shows the mode of the receiving channel. FIG. 4 also shows an example in which a time-division-multiplexed wireless line between the base station 2c and the mobile phones 1a to 1d is composed of 4 channels, and 1 frame is 4 channels. That is, one frame is time-divisioned into four for the transmission (downlink) channel from the base station 2c to the mobile phones 1a to 1d and the reception (uplink) channel from the mobile phones 1a to 1d of the base station 2c. There are 4 channels, CH1 to CH4. In Fig. 4, three mobile phones 1a, 1b, and 1c are communicating with the base station 2c, and the same music data is requested and downloaded from the download center 6, or the same data is downloaded from the content distribution center 7. The channel allocation when the data is distributed by requesting is shown.

【0023】

In the second embodiment, when data of the same content (content includes music data) is requested and the data is transferred, CH1 of the downlink channel in the base station 2c is shown as shown in FIG. Is shared as a transmission channel to three mobile phones 1a to 1c, and CH1 of the uplink channel is further time-divided into four subchannels 1.₁~1₄And subchannel 1₁Is assigned to the transmission channel from mobile phone 1a to base station 2c, and subchannel 1₂Is assigned to the transmission channel from mobile phone 1b to base station 2c, and subchannel 1₃Is assigned to the transmission channel from mobile phone 1c to base station 2c.

【0024】

That is, as shown in the figure, the three mobile phones 1a to 1c and the base station 2c share CH1 of the four multiplexed channels, so that the base station 2c transmits the same content data on the downlink channel. doing. By receiving the assigned CH1, the three mobile phones 1a to 1c can each receive the same content data transmitted from the base station 2c. Then, on the three mobile phones 1a to 1c, subchannel 1 in which the upstream channel of CH1 is time-divisioned is used.₁~1₃Can be assigned to each and transmitted to base station 2c. As a result, the three mobile phones 1a to 1c can transmit and receive to each other by using only one channel of the base station 2c and CH1, and the line utilization rate can be improved. When transferring content data to three mobile phones 1a to 1c, the information transmitted from each of the mobile phones 1a to 1c is information such as content changes, so the assigned transmission channel is slow. It will be possible to sufficiently transmit even the channel of.

【0025】

The first embodiment and the second embodiment of the channel allocation method of the present invention described above are channel allocation methods when a content is requested and the data is transferred to a mobile phone. Therefore, when a normal call is requested, the channel allocation in the manner shown in FIGS. 3 and 4 is not performed. In the cellular system shown in FIG. 1, the channel allocation when three mobile phones 1a, 1b, and 1c request a normal call is as shown in FIG. 8 as a conventional example. Figure 8 corresponds to an example in which a time-division multiplex radio line between the base station 2c and the mobile phones 1a to 1d is composed of four channels, and the transmission (downlink) channel from the base station 2c to the mobile phones 1a to 1d. And, the reception (uplink) channel of the base station 2c from the mobile phones 1a to 1d is divided into four time divisions in one frame to be four channels of CH1 to CH4.

【0026】

Here, when three mobile phones 1a, 1b, and 1c are communicating with the base station 2c, CH1 is assigned to the mobile phone 1a and the downlink channel of CH1 is transmitted from the base station 2c to the mobile phone 1a. In addition, the uplink channel of CH1 is assigned to receive from mobile phone 1a, CH2 is assigned to mobile phone 1b, the downlink channel of CH2 is transmitted to mobile phone 1b, and the uplink channel of CH2 is received from mobile phone 1b. CH3 is assigned to mobile phone 1c, and the downlink channel of CH3 is assigned to transmission to mobile phone 1c, and the uplink channel of CH3 is assigned to reception from mobile phone 1c. That is, as shown in the figure, the mobile phone 1a can transmit and receive through the base stations 2c and CH1, the mobile phone 1b can transmit and receive through the base stations 2c and CH2, and the mobile phone 1c can transmit and receive through the base stations 2c and CH3. You will be able to do it. In this way, when a normal call is made, the same channel allocation as in the conventional case is performed, so that the line utilization rate becomes the same as in the conventional case.

【0027】

Next, FIG. 5 shows a configuration of an embodiment of the base station 2 which is the connection control station according to the present invention. In FIG. 5, 31 is an antenna generally regarded as a diversity antenna, and 32 is a duplexer (DUP) that branches the received signal received by the antenna 31 to the receiving unit 33 and the transmitting signal from the transmitting unit 38 to the antenna 31. ). Reference numeral 33 denotes a receiving unit that demodulates the received signal, supplies the connection request signal in the received signal to the connection request signal detection unit 34, and supplies the disconnection signal detection unit 37 if the received signal is a disconnection signal. Then, the receiving unit 33 supplies a signal other than the connection request signal and the disconnecting signal to the control unit 36. When 34 receives a connection request signal, it determines whether it is a normal call request or a content request, and supplies channel allocation information according to the request to the channel allocation unit (CH allocation) 35. Connection request signal detection unit Is. The connection request signal detection unit 34 determines that the content request is based on the telephone number of the connection destination in the connection request signal, or determines that the content request is based on the destination address in the connection request signal.

【0028】

Reference numeral 35 denotes a channel allocation unit that allocates channels according to the channel allocation information, sets the channel assigned to the base station 2 to the transmission unit 38, and supplies the channel allocation information assigned to the mobile phone 1 to the control unit 36. 36 sends out the outgoing information and the call signal supplied from the receiving unit 33 to the line and sends them to the mobile exchange station 3, and also supplies the connection request signal from the line to the connection request signal detecting unit 34 to request disconnection from the line. It is a control unit 36 that supplies a signal to the disconnection signal detection unit 37. Further, the control unit 36 supplies incoming information from the line, call signals, or content data to the transmission unit 38, and controls the entire base station 2. Reference numeral 38 denotes a transmission unit that modulates various signals supplied from the control unit 36 so as to be transmitted on the channel set by the channel allocation unit 35 and supplies the signals to the DUP 32.

【0029】

The first channel allocation method of the present invention executed by the base station 2 according to the present invention having the configuration shown in FIG. 5 will be described with reference to the first communication sequence shown in FIG. In the communication sequence shown in FIG. 6, a connection request signal is first transmitted from the mobile phone 1a using the control channel. It is assumed that this connection request signal is a request to download music 1 from the download center 6. The connection request signal detection unit 34 determines that it is a content request because the telephone number of the connection destination in the connection request signal is the download center 6, and determines that the connection request signal from the mobile phone 1a is used for a predetermined time, for example, 5 Wait for a similar connection request from another mobile phone for a second. Here, it is assumed that there is a connection request signal for a request to download music 1 from the download center 6 from the mobile phone 1b and the mobile phone 1c as shown in the figure. When the connection request signal detection unit 34 of the base station 2 detects such a connection request signal requesting the same content, the connection request signal detection unit 34 assigns a transmission channel and a reception channel to the three mobile phones 1a to 1c, respectively. .. In this case, since the three mobile phones 1a to 1c are requested for the same content, the channels should be shared and assigned.

【0030】

That is, the mobile phone 1a has CH1 as the receiving channel and CH1 of the frame 1 shown in FIG. 3 as the transmitting channel (hereinafter, subchannel CH1).₁The mobile phone 1b is assigned CH1 as a receiving channel and CH1 of frame 2 shown in FIG. 3 as a transmitting channel (hereinafter, subchannel CH1).₂The mobile phone 1c is assigned CH1 as a receiving channel and CH1 of frame 3 shown in FIG. 3 as a transmitting channel (hereinafter, subchannel CH1).₃") Is assigned. These channel allocation information is sent from the CH allocation unit 35 to the control unit 36, modulated by the transmission unit 38, and transmitted from the antenna 31 to the three mobile phones 1a to 1c via the DUP 38. The CH allocation unit 35 sets the transmission channel of the base station 2 to the transmission unit 38 according to the above channel allocation. In this case, the channel to be transmitted to the mobile phones 1a to 1c is set to CH1.

【0031】

Since the connection request signal is a request to download music 1, the control unit 36 uses the line of mobile exchange station 3-barrier exchange station 4-general telephone exchange station 5b-general telephone exchange station 5a-download center 6. , Read the music data of music 1 from the download center 6. The read music data of the music 1 is supplied from the control unit 36 to the transmission unit 38, modulated by the transmission unit 38, and the music data of the music 1 is transmitted from the antenna 31 to CH1 via the DUP 38. As a result, the three mobile phones 1a to 1c can download the music data of the music 1 by receiving CH1. When the download of the music data of the music 1 is completed on the mobile phone 1a and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH1.₁The base station 2 receives this and disconnects the line from the mobile phone 1a. Similarly, when the download of the music data of the music 1 is completed on the mobile phone 1b and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH1.₂The base station 2 receives this and disconnects the line from the mobile phone 1b.

【0032】

Here, when the download of the music data of the music 1 is completed on the mobile phone 1c, a connection request for further downloading the music 2 from the download center 6 is sent to the base station 2 on the subchannel CH1.₃Suppose that it was transmitted on the transmission channel of. Then, when waiting for a predetermined time from the connection request signal from the mobile phone 1c, for example, it is assumed that there is a connection request to download the music 2 from the mobile phone 1d from the download center 6 while waiting for 5 seconds. In response to this, the base station 2 detects that there are a plurality of connection request signals requesting the same content, and the connection request signal detection unit 34 transmits the connection request signal detection unit 34 to the two mobile phones 1c and 1d again. Reassign channels and receive channels respectively.

【0033】

That is, in the mobile phone 1c, CH1 is used as the receiving channel and CH1 is used as the transmitting channel.₁Is assigned to the mobile phone 1d, CH1 is the receive channel and CH1 is the subchannel as the transmit channel.₂Is assigned. These channel allocation information is sent from the CH allocation unit 35 to the control unit 36, modulated by the transmission unit 38, and transmitted from the antenna 31 to the two mobile phones 1c and 1d via the DUP 38. The CH allocation unit 35 sets the transmission channel of the base station 2 to the transmission unit 38 according to the above channel allocation. In this case, the channel to be transmitted to the mobile phones 1c and 1d is set to CH1.

【0034】

The control unit 36 reads the music data of the music 2 from the download center 6 via the line to the download center 6. The read music data of the music 2 is supplied from the control unit 36 to the transmission unit 38, modulated by the transmission unit 38, and the music data of the music 2 is transmitted from the antenna 31 to CH1 via the DUP 38. As a result, the two mobile phones 1c and 1d can download the music data of the music 2 by receiving CH1. When the download of the music data of the music 2 is completed on the mobile phone 1c and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH1.₁The base station 2 receives this and disconnects the line from the mobile phone 1c. Similarly, when the download of the music data of the music 2 is completed on the mobile phone 1d and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH1.₂The base station 2 receives this and disconnects the line from the mobile phone 1d.

【0035】

In this way, when the music data to be downloaded is the same, the music data can be distributed to a plurality of telephone terminal stations using only one channel. In addition, even when multiple telephone terminal stations request the distribution of weather forecasts and news of the same content within a predetermined time instead of music data, only one channel from the content distribution center 7 is used by the above-mentioned channel allocation method. It is possible to deliver the same content weather forecast and news to multiple telephone terminal stations. Further, the predetermined time for waiting until a connection request for the same content occurs is not limited to 5 seconds, and may be longer or shorter. Further, in the above description, the channel allocation is performed by the first channel allocation method of the present invention shown in FIG. 3, but it may be performed by the second channel allocation method of the present invention shown in FIG. The music data distributed from the download center 6 and the weather forecast and news distributed from the content distribution center 7 are regarded as stream data, but they are used when distributing such stream data to multiple telephone terminal stations. The channel to be used may be reserved as a multicast line in advance so that it can be used preferentially.

【0036】

Next, the second channel allocation method of the present invention executed by the base station 2 according to the present invention having the configuration shown in FIG. 5 will be described with reference to the second communication sequence shown in FIG. 7. In the communication sequence shown in FIG. 7, first, a connection request signal for downloading the music 1 is transmitted from the mobile phone 1a using the control channel. The connection request signal detection unit 34 determines that it is a content request because the telephone number of the connection destination in the connection request signal is the download center 6, and the connection request signal detection unit 34 sends the transmission channel and reception to the mobile phone 1a. Assign each channel. In this case, the mobile phone 1a has CH1 as the receive channel and subchannel CH1 as the transmit channel.₁To assign. Since the connection request signal is a request to download music 1, the control unit 36 uses the line of mobile exchange station 3-barrier exchange station 4-general telephone exchange station 5b-general telephone exchange station 5a-download center 6. , Read the music data of music 1 from the download center 6. The read music data of the music 1 is supplied from the control unit 36 to the transmission unit 38, modulated by the transmission unit 38, and the music data of the music 1 is transmitted from the antenna 31 to CH1 via the DUP 38. As a result, the mobile phone 1a can download the music data of the music 1 by receiving CH1.

【0037】

It is assumed that there is a connection request signal for downloading the music 1 from the mobile phone 1b while downloading the music data of the music 1. When the connection request signal detection unit 34 of the base station 2 detects such a connection request signal requesting the same content, the connection request signal detection unit 34 sets CH1 as the reception channel and the subchannel CH1 as the transmission channel on the mobile phone 1b.₂To assign. At this time, the music data of the music 1 is being transmitted from the transmission unit 38 of the base station 2 via the DUP 38 and the antenna 31 on CH1. Therefore, when the mobile phone 1b receives CH1, the music data of the music 1 which is the stream data is downloaded from the middle. At this time, the mobile phone 1a continuously downloads the music data of the music 1 by receiving CH1.

【0038】

Next, it is assumed that there is a connection request signal for downloading the music 2 from the mobile phone 1c. The connection request signal detection unit 34 determines that the request is for the content because the telephone number of the connection destination in the connection request signal is the download center 6, but the connection request signal detection unit 34 determines that the content is different. CH2 is used as the receiving channel on the mobile phone 1c, and CH2 of frame 1 shown in FIG. 3 is used as the transmitting channel (hereinafter, "subchannel CH2").₁) Is assigned. Since the connection request signal is a request to download music 2, the control unit 36 uses the line of mobile exchange station 3-barrier exchange station 4-general telephone exchange station 5b-general telephone exchange station 5a-download center 6. , Read the music data of music 2 from the download center 6. The read music data of the music 2 is supplied from the control unit 36 to the transmission unit 38, modulated by the transmission unit 38, and the music data of the music 2 is transmitted from the antenna 31 to CH2 via the DUP 38. As a result, the mobile phone 1c can download the music data of the music 2 by receiving CH2.

【0039】

While downloading the music data of this music 2, the download of the music 1 on the mobile phone 1a is completed, and the mobile phone 1a makes a request change to download the music 2. The connection request signal is sent to the base station 2 as a subchannel CH1.₁Suppose you sent it with. When the connection request signal detection unit 34 of the base station 2 detects the connection request signal requesting the download of the music 2, the connection request signal detection unit 34 is already transmitting the music data of the music 2 on CH2. CH2 is used as the receiving channel for the mobile phone 1a, and CH2 of frame 2 shown in FIG. 3 is used as the transmitting channel (hereinafter, subchannel CH2).₂) Is assigned. Therefore, when the mobile phone 1b receives CH2, the music data of music 2 which is the stream data transmitted by CH2 from the transmission unit 38 of the base station 2 via the DUP 38 and the antenna 31 can be downloaded from the middle. Become. At this time, the mobile phone 1c continues to download the music data of the music 2 by receiving CH2. Further, the music data of the music 1 which is the stream data is transmitted from the transmission unit 38 of the base station 2 via the DUP 38 and the antenna 31, and the mobile phone 1b downloading the music 1 from the middle transmits the CH1. It continues to download the music data of the remaining music 1 by receiving it.

【0040】

When the download of the music data of the remaining music 1 on the mobile phone 1b is completed and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH1.₂The base station 2 receives this and disconnects the line from the mobile phone 1b. Similarly, when the download of the music data of the music 2 is completed on the mobile phone 1c and the end button is operated, a disconnection request is sent to the base station 2 on the subchannel CH2.₁The base station 2 receives this and disconnects the line from the mobile phone 1c. Further, the music data of the music 2 which is the stream data is transmitted from the transmission unit 38 of the base station 2 via the DUP 38 and the antenna 31, and the mobile phone 1a downloading the music 2 from the middle transmits the CH2. It continues to download the music data of the remaining music 2 by receiving it. Then, when the mobile phone 1a finishes downloading the music data of the remaining music 2 and operates the end button, a disconnection request is sent to the base station 2 on the sub-channel CH2.₂The base station 2 receives this and disconnects the line from the mobile phone 1a.

【0041】

In the above description, the channel allocation is performed by the first channel allocation method of the present invention shown in FIG. 3, but it may be performed by the second channel allocation method of the present invention shown in FIG. The music data distributed from the download center 6 and the weather forecasts and news distributed from the content distribution center 7 are regarded as stream data, but they are used when distributing such stream data to multiple telephone terminal stations. The channel to be used may be reserved as a multicast line in advance so that it can be used preferentially. When the content downloaded to the telephone terminal station as described above is music data, the downloaded music data can be used as music data for an incoming melody or a music hold to notify an incoming call, or a call can be made. You may play the music data downloaded at the time and use it as BGM.

【0042】

[Effect of the invention]

As described above, when transmitting the same content data to two or more telephone terminal stations, the present invention allocates one downlink channel and transmits the data to two or more telephone terminal stations at the same time. Data can be transmitted by connecting two or more telephone terminal stations and a base station, which is a connection control station, by means of channels. As a result, the line utilization rate can be improved, and the occurrence of call loss can be prevented as much as possible. Also, if a request for the same content occurs while transmitting content data, one downlink channel is assigned to all the requested telephone terminal stations to transmit the same content data. .. Therefore, since data can be transmitted by connecting two or more telephone terminal stations and a base station which is a connection control station by one channel, the line utilization rate can be improved and call loss occurs. Can be prevented as much as possible.

【0043】

Further, as the upstream channel assigned to the telephone terminal station at the time of requesting the content, it is sequentially assigned to the telephone terminal station at intervals of an integral multiple of the frame cycle. Alternatively, the uplink channel of the assigned channel is time-divisioned so that each divided channel is assigned to all the requested telephone terminal stations. In this way, even if a low-speed uplink channel is assigned, the data transmitted from the telephone terminal station can be sufficiently transmitted because the request change is the main data.

[Simple explanation of drawings]

[Figure 1]

It is a figure which shows the schematic structure of the cellular system to which the channel allocation method of this invention can be applied.

[Figure 2]

It is a figure which shows the configuration example of the mobile phone in the cellular system which can apply the channel allocation method of this invention.

[Fig. 3]

It is a figure which shows the 1st Embodiment of the channel allocation method of this invention.

[Fig. 4]

It is a figure which shows the 2nd Embodiment of the channel allocation method of this invention.

[Fig. 5]

It is a figure which shows the structure of the embodiment of the base station which is the connection control station of this invention.

[Fig. 6]

It is a sequence diagram of the 1st communication which shows the 1st channel allocation method of this invention executed in the base station which concerns on this invention.

[Fig. 7]

It is a sequence diagram of the 2nd communication which shows the 2nd channel allocation method of this invention executed in the base station which concerns on this invention.

[Fig. 8]

It is a figure which shows the conventional method of channel allocation at the time of communication between a base station and a mobile phone which is a telephone terminal station.

[Explanation of symbols]

1,1a ~ 1d mobile phone, 2,2a ~ 2d base station, 3 mobile exchange, 4 barrier exchange, 5a, 5b, 5c general telephone exchange, 6 download center, 7 content distribution center, 10 CPU, 11 RAM , 12 ROM, 13 Communication section, 14 Audio processing section, 15 Music playback section, 16 Interface, 17 Input section, 18 Display section, 19 Vibrator, 20 External device, 21 Microphone, 22 Earpiece speaker, 23 Incoming speaker, 24 Bus, 25 antennas, 31 antennas, 32 duplexers, 33 receivers, 34 connection request signal detectors, 35 channel assigners, 36 controls, 37 disconnect signal detectors, 38 transmitters