JPH11150761A - Mobile radio communication system for radio communication by w-cdma system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system for radio communication by the W-CDMA system where customers are fully satisfied. SOLUTION: Based on interference power and SIR measured by a base station 2 in two ways of transmission power control, the base station 2 indexes communication available bit rate information, and sends it superimposed on an outgoing channel signal sent to a mobile station 1. The mobile station 1 detects and converts available communication service information from the information signal, displays the converted information on a display device. In the case that the user uses actually the communication service, a key button of the mobile station 1 selects available bit rate information, superimposes the information on an incoming channel signal to be sent to the base station 2. The base station 2 discriminates whether or not the communication service is available continuously based on the information and superimposes the information on the outgoing channel signal sent to the mobile station 1. The mobile station 1 detects and converts the discrimination information from the information signal and displays the converted information on the display device of the mobile station 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system for performing wireless communication in a W-CDMA system, and in two transmission power controls (open-loop transmission power control and closed-loop transmission power control), an interference measured by a base station. Power, SIR
Based on the (desired received power to interference power ratio), the base station determines bit rate information (unit: bps) that can be used for communication and superimposes it on a downlink signal to be transmitted to the mobile station. Performs conversion work to detect available communication service information, displays the converted information on the display of the mobile station as a guideline for the user to use the communication service, and when the user actually uses the communication service The user selects the bit rate information (unit: bps) to be used with the key button of the mobile station, and superimposes the information on the uplink signal to be transmitted to the base station. Based on the information, the base station will continue the communication service in the future. To determine whether or not it can be used, and superimpose it on the downlink signal to be transmitted to the mobile station. It relates a mobile communication system to display the information after the display of the mobile station.

[0002]

2. Description of the Related Art In recent years, digitization of an analog band has been studied for effective use of frequencies, and research and development of a W-CDMA system, which is one of digital systems, has been conducted (for example, Japanese Patent Application Laid-Open No. Hei 8-289367). See).

In this W-CDMA system, since many users share the same frequency and the same time, an interference wave from another user is one of the factors that deteriorate the quality of its own communication.

[0004] Therefore, in order to continue communication as a system, it is necessary to adjust the desired received power reaching the base station to a predetermined level for each user.

On the other hand, there is a method of controlling the transmission power of the mobile station to control the interference level of the entire system.
This method is called transmission power control, and this method employs two control methods, open-loop transmission power control and closed-loop transmission power control.

FIG. 1 shows a conceptual diagram of power control in a mobile communication system according to this method.

Referring to FIG. 1, open-loop transmission power control is a control method used when communication of an access channel or the like is first started, and is a transmission method calculated from desired reception power input to mobile station 1. The power is determined, and the transmission is performed intermittently a predetermined number of times. When there is no response from the base station 2, the transmission power is sequentially increased by a predetermined difference to perform the intermittent transmission.

[0008] Closed loop transmission power control is a control method performed after continuous communication is established. Base station 2 receives an uplink signal from mobile station 1 by AGC amplifier 201 and despreads by despreading circuit 202. Then, the signals are RAKE-combined by the weighted in-phase composition circuit 203. The combined signal is demodulated into reception data by the data demodulation circuit 204 and sent to the exchange 3. On the other hand, the synthesized signal is
5 and measures a desired received power-to-interference power ratio (hereinafter, referred to as SIR) per 1 bit of the signal.
The comparison circuit 206 performs comparison with the target value SIR value set by the circuit 207. As a result of the comparison, if the measured value is large (small), the mobile station 1 issues a command to lower (increase) the transmission power. This command causes the base station 2 to superimpose a signal called a transmission power control bit (hereinafter, referred to as a TPC bit) with a signal transmitted from the exchange 3 in a slot cycle (every 625 μs), modulate the data with a data modulation circuit 208, The signal is spread by the spread modulation circuit 209 and
It is realized by transmitting to 0. In the mobile station 1, the down-link signal from the base station 2 is received by the AGC amplifier 101, despread by the despreading circuit 102, and the transmission power is controlled by the power amplification circuit 107 according to the TPC bit demodulated by the data demodulation circuit 103.

In the mobile communication system based on this system, research and development of a system which can transmit a signal at 2 Mbps in the future and can use a communication service such as a moving image transmission is being conducted.

On the other hand, in the current mobile communication system that performs wireless communication using the PDC system, communication services such as data communication and still image communication can be used.

However, the user responds to the ever-changing electric field level by asking, "What is the state of the communication environment in which the user is located? (What is the desired received power and the interference power from other users? In an extremely bad communication environment, "would it be better to refrain from using services at the moment," and "What kind of services can be used?" Information is not known.

[0012]

In the future, wireless communication in the W-CDMA system will be performed, and data communication services and moving image communication services will be available in the near future.
As the number of users to use increases, in order to provide these communication services in an environment that is easy for users to use, users themselves can now know their own communication environment (the current communication environment). To provide the mobile station with the communication service information that can be used by the user, so that the user can determine whether or not to use the service when actually using the service.) When the user actually uses the service, It is necessary to provide a service in which the base station determines whether or not it is suitable for use and informs the mobile station of the information after the determination.

[0013] Accordingly, an object of the present invention is to provide a mobile communication system for performing wireless communication in the W-CDMA system to a user for communication service information available in a serving cell and for a service used by the user. By prompting the user to determine whether the information is appropriate or not, it becomes information that determines whether the user should really use the service to be used in the future, thereby enhancing customer satisfaction.

Another object of the present invention is to provide a method for determining whether or not a user can actually use a communication service at a high bit rate, such as video transmission, in a serving cell in an extremely poor communication environment. By prompting the user, it is possible to prevent user's own erroneous operation, reduce unnecessary communication costs, and reduce the power consumption of the mobile terminal, thereby improving the operability and lower power consumption of the mobile terminal To make it happen.

[0015]

SUMMARY OF THE INVENTION The present invention provides a W-CDMA system.
The above-described problem is solved by the following characteristic configuration based on open-loop transmission power control and closed-loop transmission power control in a mobile communication system that performs wireless communication in a system.

That is, in the mobile communication system of the present invention, in the open-loop transmission power control, the base station includes base station conversion means for determining communicable bit rate information from power information in the serving cell in the broadcast channel generation circuit. .
This information is added to the frame format of the broadcast channel, data modulated and spread modulated, and transmitted to the mobile station as a downlink signal.

In the closed-loop transmission power control, when the mobile station starts continuous communication, the base station despreads signal information transmitted on the uplink and performs weighted in-phase synthesis.
Base station conversion for calculating bit rate information indicating a communication service that the user intends to perform from the signal after data demodulation, and calculating actual communicable bit rate information from the SIR measured by the SIR measurement circuit of the base station. Means are provided in the SIR measurement circuit. After that, the comparison circuit compares the target SIR with the target SIR and determines whether or not the communication service used by the user can be actually continued based on the bit rate information obtained by demodulating the data. , And the data is combined with the transmission data from the exchange, data modulated and spread modulated, and transmitted to the mobile station as a downlink signal.

The mobile station first despreads the downlink signal and demodulates the data. In the open loop transmission power control, the bit rate information included in the frame format of the broadcast channel is used. Mobile station conversion means for converting the bit rate information and the determination result contained in the TPC bits of the mobile station into usable communication services and conversion into the determination information; service information and determination information obtained by the mobile station conversion means An arithmetic circuit including a mobile station storage means for storing information every time the mobile station is updated, and accessing the mobile station storage means at a constant cycle, and when the information is updated, the information is sent to the mobile station display means. Mobile station switching means for setting; and mobile station display means for displaying communication service information updated by the mobile station switching means on a display. Display circuit, in which the user is provided with an operation circuit for interlocking to a key button operated when using the communication services.

According to the configuration of the mobile communication system of the present invention, by constantly displaying updated communication service information on the display of the mobile station, it is possible to first determine whether the user himself / herself should use the service in the serving cell. Can be.

Further, when the user determines that the communication environment of the serving cell is “extremely bad” based on this information, the user himself / herself seeks a new good communication environment, thereby preventing the deterioration of the communication quality of the user. it can.

When the user actually uses various communication services, the user first selects what kind of communication service to use by using key buttons.
The base station determines whether the selected information is appropriate, notifies the mobile station of the determination result, and displays the determination information on the display to determine whether the service can be used. Can be prevented. Further, it is possible to prevent a situation in which communication is interrupted due to deterioration of communication quality when using a data communication service or the like.

As a result, unnecessary communication costs of the user can be suppressed, and unnecessary power consumption in the portable terminal can be avoided.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a configuration diagram of a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 2, a mobile communication system according to the present invention includes an exchange (MLS) 3 and a base station (B) in a cell.
S) 2 and a plurality (n) of mobile stations (MS 1 to MSn) 1
It is composed of Base station BS and mobile stations MS1-MS
n is the downlink 4 used for communication from the base station BS to the mobile stations MS1 to MSn, and the mobile stations MS1 to MSn.
It is connected by the uplink 5 used when performing communication from MSn to the base station BS. The downlink 4 includes a common control channel, a traffic channel, and an individual control channel, and the uplink 5 includes a common control channel, a traffic channel, and an individual control channel.

The downlink common control channel is the mobile station M
A base station transmits a broadcast channel for transmitting systematic control information including a perch channel which is first supplemented by S1 to MSn when the power is turned on, and information for communication (charging information, traffic channel number, scramble code, etc.). BS
From the mobile station MS1 to MSn, and an access channel for transmitting control information when the cell in which the mobile station is located is known. The traffic channel is a channel for transmitting user information or user packet data. The dedicated control channel is a channel for transmitting control information such as call connection and call release of a traffic channel.

The uplink common control channel is the mobile station M
If S1 to MSn know the serving cell, base station B
It comprises an access channel for transmitting control information as a signal responding to S. The traffic channel is
This is a signal for responding from the mobile stations MS1 to MSn to the base station BS, and is a signal for transmitting user information or user packet data. The dedicated control channel is a signal for the mobile stations MS1 to MSn to transmit control information as a signal responding to the base station BS.

FIGS. 3 and 4A and 4B are functional block diagrams of the base station BS. 3 and 4, the base station BS includes a matched filter (despreading) circuit 401, a spreading code (# 1 to #n) 402 set for each mobile station, a weighted in-phase combining circuit 403, and an SIR measuring circuit 404.
, Comparison circuit 405, data demodulation circuit 406, TP
A C-bit generation circuit 407; a broadcast channel generation circuit 408 used until continuous communication is performed; a data modulation circuit 409; a spread modulation circuit 410;
11 and an exchange interface circuit 412 which is an interface with the exchange.

Broadcast channel generation circuit 408 includes base station conversion means 4081 for determining communicable bit rate information from power information. The SIR measurement circuit 404 includes a base station conversion unit 4041 for calculating information on a communicable bit rate from interference power.

Here, the bit rate information determined by the base station converting means 4081 in the broadcast channel generation circuit 408 is set as follows based on the value of the interference power in the power information included in the broadcast channel frame format. I do.

Interference power Bit rate information 25 dBu or more 9.6 kbps (normal communication) 15 dBu or more and less than 25 dBu 28.8 kbps (packet communication) 5 dBu or more and less than 15 dBu 384 kbps (low-speed video transmission) 0 dBu or more and less than 5 dBu 2 Mbps (high-speed video transmission) (Formula a) Base station conversion means 404 in SIR measurement circuit 404
The bit rate information determined by 1 is set as follows from the SIR measured by the SIR measurement circuit.

SIR bit rate information 25 dBu or more and 2 Mbps (high-speed moving image transmission) 15 dBu or more and less than 25 dBu 384 kbps (low-speed moving image transmission) 5 dBu or more and less than 15 dBu 28.8 kbps (packet communication) 0 dBu or more and less than 5 dBu 9.6 kbps (normal communication) ... (Formula b) The judgment and the judgment result in the comparison circuit are set as follows.

If (bit rate information) − (set bit rate information) ≧ 0, the determination result is set to OK. (Bit rate information) − (set bit rate information) <0, the determination result is NG. Setting (Formula c) FIGS. 5 and 6 are functional configuration diagrams of the mobile station MS, typically MS1. 5 and 6, the mobile station MS1
Despreading circuit 501, data demodulation circuit 502, arithmetic circuit 503, display circuit 504, operation circuit 505,
It comprises a data modulation circuit 506, a spreading code (# 1) 507 unique to the mobile station MS1, a power amplification circuit 508, an access channel generation circuit 509 used until continuous communication is performed, and an antenna 510.

The arithmetic circuit 503 converts the bit rate information and decision information contained in the information signal into service information usable for communication and a decision result.
And the mobile station storage means 5032 for storing the service information obtained by the mobile station conversion means 5031 and the information each time the determination result is updated. The display circuit 504 accesses the mobile station storage means 5032 at regular intervals and updates the information when the information is updated.
Mobile station switching means 5042 passed to the mobile station switching unit 041, and a mobile station display for confirming the service information available for communication updated by the mobile station switching means 5042, the determination result, and the items set when the user actually uses the service. Means 50
41. The operation circuit 505 includes a key button 5051, a speaker 5052, and a microphone 5053 that are operated when a user uses a communication service.

FIG. 7 is a diagram showing the structure of a broadcast channel frame. A bit rate information bit is added to the power information signal. The bit rate information is 9.6 kb according to the communication transmission speed.
ps, 28.8 kbps, 384 kbps, 2 Mbps
The mobile station display means 5041 of the mobile station MS1 displays 9.6 kbps as a normal call service, 28.8 k
bps is a packet data transmission communication service, 384 kb
ps corresponds to a low-speed moving image transmission communication service, and 2 Mbps corresponds to a high-speed moving image transmission communication service, and each displays information.

FIG. 8 is a diagram showing the structure of an individual control channel frame. The bit rate information and the determination result are added to the TPC bit information. The bit rate information is 9.6 kbps, 28.8 kbps, 384 kbps,
2 Mbps or the like is set, and 9.6 kbps is a normal call service in the mobile station display means 5041 of the mobile station MS1.
28.8 kbps is a packet data transmission communication service,
384 kbps is a low-speed video transmission communication service, 2 Mbps
s corresponds to a high-speed moving image transmission communication service and displays information. The determination result is set to OK / NG, and the mobile station MS1
The mobile station display means 5041 displays information corresponding to the determination result.

FIG. 9 is a configuration diagram of a traffic channel frame. The bit rate information and the determination result are added to the TPC bit information. The bit rate information is 9.6 kbps, 28.8 kbps, 384 kbp according to the communication transmission speed.
s, 2 Mbps, etc., and 9.6 kbps is a normal call service, 28.8 kbps is a packet data transmission communication service, 384 kbps is a low-speed video transmission communication service, and the mobile station display means 5041 of the mobile station MS1 sets 2M.
bps corresponds to a high-speed moving image transmission communication service and displays information. The determination result is set to OK / NG, and the mobile station M
Information corresponding to the determination result is displayed on the mobile station display means 5041 in S1. Also, the mobile station MS1 adds selection information (bit rate information used by the user) to the information signal,
Used when making a determination in the comparison circuit.

Next, the operation of the preferred embodiment of the present invention will be described in detail with reference to the drawings. The operation of the embodiment of the present invention is based on the above-described configuration, provided that the communication environment of the serving cell of the mobile station MS1 is good.

FIG. 10 is an operation flowchart of the mobile station MS1 when the power is turned on.

The operation of the mobile station MS1 will be described with reference to FIGS.

When the mobile station MS1 is powered on, a broadcast channel information signal transmitted from the base station BS1 as a downlink signal is received by the antenna 510, and a despreading circuit 501 is provided.
(Step 81 in FIG. 10), and the data demodulation circuit 502 demodulates the broadcast channel information signal (step 82 in FIG. 10). The arithmetic circuit 503 calculates the bit rate information included in the interference power information in the demodulated information signal.
The mobile station conversion means 5031 converts the service information into service information usable for communication (step 83 in FIG. 10). At this time,
Since the communication environment of the serving cell of the mobile station MS1 is good, it is assumed that the bit rate information from the base station BS1 indicates 384 kbps based on (Formula a). The converted service information is stored in the mobile station storage means 5032 (step 84 in FIG. 10), and the mobile station switching means 5042 in the display circuit 504 is operated at a fixed period (from the base station BS1 to the mobile station MS).
Mobile station storage means 50 each time a downlink signal to
32 (step 85 in FIG. 10), and if the information has been updated, notifies the mobile station display means 5041 (step 86 in FIG. 10). As long as the bit rate information does not change as it is, the information of the “low-speed moving image transmission communication service” is displayed on the mobile station display means 5041. After receiving the broadcast channel information in the downlink signal, the mobile station MS1 generates a transmission signal in the access channel generation circuit 509 (step 87 in FIG. 10),
06 (step 88 in FIG. 10) and the mobile station MS1
The signal is spread by the unique spreading code (# 1) 507 (step 89 in FIG. 10), and the power
Send to

FIG. 11 is an operation flowchart of the mobile station MS1 when the mobile station MS1 starts continuous communication.

The operation of the mobile station MS1 will be described with reference to FIGS.

When the mobile station MS1 starts continuous communication, first, the operation circuit 505 operates a key button 5051 to perform a calling operation to generate an information signal (FIG. 11).
Step 91). At this time, the user also selects communication service information to be used. The selected information is added to the information signal as selected information. At this time, it is assumed that the user has selected “low-speed video transmission communication service: 384 kbps” as the communication service to be used. The information signal including the selected information is modulated by the data modulation circuit 506 (step 92 in FIG. 11), and the spread code (# 1) 5
The signal is spread at 07 (step 93 in FIG. 11), and transmitted to the antenna 510 via the power amplification circuit 508. Thereafter, the reception information signal from base station BS1 is received as a downlink signal by antenna 510 and despread by despreading circuit 501 (FIG. 11).
(Step 94), and then demodulation is performed by the data demodulation circuit 502 (step 95 in FIG. 11). After demodulation, the information of the TPC bit data included in the information signal is extracted, and a transmission power control command is transmitted to the power amplification circuit (FIG. 1).
1 step 96). The bit rate information added to the TPC bit and the determination result are converted into communicable service information and determination information by the mobile station conversion means 5031 of the arithmetic circuit 503 (step 97 in FIG. 11). At this time, the mobile station M
Since the communication environment of the serving cell of S1 was good, the bit rate information from the base station BS1 was 3 based on (formula b).
84 kbps, and the judgment result is O based on (Formula c).
It is assumed that K is indicated. The converted service information and determination information are stored in the mobile station storage means 5032 (step 98 in FIG. 11), and the mobile station switching means 504 in the display circuit 504 is provided.
2 accesses the mobile station storage means 5032 at a fixed period (every time a downlink signal is transmitted from the base station BS1 to the mobile station MS1) (step 99 in FIG. 11), and if the information has been updated, the mobile station Notification is made to the display means 5041 (FIG. 11
Step 9A). At this time, "low-speed video transmission communication service" is displayed on the mobile station display means as bit rate information, and information on the determination result OK is displayed as determination information. At this time, the user himself / herself judges whether or not to continue the communication as it is based on the displayed information (step 9B in FIG. 11), and if continuation is possible, performs the communication as it is (step 91 in FIG. 11). If continuation is not possible, a call disconnection operation is performed (step 9C in FIG. 11). In the embodiment of the present invention, since the communication environment of the cell where the user is located is good, it is assumed that the user has continued the communication thereafter (step 91 in FIG. 11).

FIG. 12 is an operation flowchart in the base station BS1 when the mobile station MS1 turns on the power.

The operation of the base station BS1 will be described with reference to FIGS.

When the power of the mobile station MS1 is turned on, a broadcast channel information signal is generated by the broadcast channel generation circuit 408 of the base station BS to supplement the perch channel of the serving cell (step 101 in FIG. 12). First, the power information in the signal is converted into bit rate information by the base station conversion means 4081 (step 102 in FIG. 12). Here, in the embodiment of the present invention, since the communication environment of the serving cell of the mobile station MS1 is good, the bit rate determined by the base station BS based on (Formula a) is 384 kbps. The converted bit rate information is added to the power information of the frame format on the broadcast channel, modulated by the data modulation circuit 409 (step 103 in FIG. 12), and further spread by the spreading modulation circuit 410 (step 104 in FIG. 12). ) The signal is sent to the antenna 411 as a downlink broadcast channel signal.

FIG. 13 is an operation flowchart of the base station BS when the mobile station MS1 starts continuous communication.

The operation of the base station BS will be described with reference to FIGS.

When mobile station MS1 starts continuous communication, an information signal input to antenna 411 as an uplink signal is transmitted to matched filter (despreading) circuit 401 by spreading code # 1 (of mobile station MS1). 13 is despread (step 111 in FIG. 13) and RAKE-combined by the weighted in-phase circuit 403 (step 11 in FIG. 13).
2) After being demodulated by the data demodulation circuit 406 (step 113 in FIG. 13), it is sent to the exchange interface circuit 412 as a received signal. Here, it is assumed that the bit rate information at which the user of the mobile station MS1 actually communicates after data demodulation is 384 kbps.
In the SIR measurement circuit 404, the desired reception power, interference power, S
The IR is measured (step 114 in FIG. 13), the measured SIR is compared with a target SIR set in advance by the comparison circuit 405, and bit rate information for performing communication is determined (FIG. 13). Step 11 of 13
5). Based on the result of comparison and determination, when the measured SIR is large (small), the TPC bit generation circuit 407 lowers (increases) the transmission power for the mobile station MS1.
The TPC bit, the measured bit rate information, and the determination result are set as described above (step 116 in FIG. 13). (The measured bit rate information and the determination result are added to the TPC bit.) At this time, the bit rate information set by the base station BS1 is 384 kbps based on (formula b), and the determination result is OK (communication based on (formula c)). Can be continued). Thereafter, when the transmission signal from the exchange is sent to the exchange interface circuit 412, it is combined with the TPC bit data (step 117 in FIG. 13) and modulated by the data modulation circuit 409 as an information signal for a downlink signal (FIG. 1
3, step 118), spread by the spread modulation circuit 410 (step 119 in FIG. 13), and send to the antenna 411 as a transmission signal.

[0051]

As described above, according to the present invention, the base station conversion means and the SI are provided in the broadcast channel generation circuit of the base station.
By providing the base station conversion means and the comparison circuit in the R measurement circuit, it is possible to determine the communicable bit rate information and the information that determines whether or not continuation is possible. As a result, the user can determine whether or not the available communication information service and the communication service to be used can be continued in the serving cell. As a result, when the user performs wireless communication, the user's own erroneous operation is prevented, and the situation in which communication is interrupted during communication due to deterioration of communication can be reduced, extra communication costs can be suppressed, and customer satisfaction is improved. be able to. Further, the power consumption of the portable terminal can be reduced and the operability of the portable terminal can be improved. If the user determines that the communication environment of the serving cell is “extremely bad” based on the displayed information, the user voluntarily seeks a good communication environment to prevent deterioration of the communication quality of the user. You can do it.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of power control of a mobile communication system according to a W-CDMA scheme.

FIG. 2 is a configuration diagram of a mobile communication system according to an embodiment of the present invention.

FIG. 3 is a functional configuration diagram of a base station BS in the embodiment of the present invention.

FIG. 4 is an internal configuration diagram of an SIR measurement circuit and a broadcast channel generation circuit of FIG. 3;

FIG. 5 is a functional configuration diagram of a mobile station MS1 according to the embodiment of the present invention.

6 is an internal configuration diagram of an arithmetic circuit, a display circuit, and an operation circuit of FIG.

FIG. 7 is a configuration diagram of a broadcast channel frame in an embodiment of the present invention.

FIG. 8 is a configuration diagram of an individual control channel frame according to the embodiment of the present invention.

FIG. 9 is a configuration diagram of a traffic channel frame according to the embodiment of the present invention.

FIG. 10 is an operation flowchart in the mobile station MS1 when the power is turned on in the mobile station MS1 in the embodiment of the present invention.

FIG. 11 is an operation flowchart in the mobile station MS1 when the mobile station MS1 starts continuous communication in the embodiment of the present invention.

FIG. 12 is an operation flowchart of the base station BS when the power of the mobile station MS1 is turned on in the embodiment of the present invention.

FIG. 13 is an operation flowchart in the base station BS when the mobile station MS1 starts continuous communication in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 mobile station 101 AGC amplifier 102 despreading circuit 103 data demodulation circuit 104 data modulation circuit 105 spreading modulation circuit 106 TX amplifier 107 power amplification circuit 2 base station 201 AGC amplifier 202 despreading circuit 203 weighted in-phase synthesis circuit 204 data demodulation circuit 205 SIR Measurement circuit 206 Comparison circuit 207 Target SIR circuit 208 Data modulation circuit 209 Spread modulation circuit 210 TX amplifier 3 Exchange 4 Downline 5 Upline 401 Matched filter (despreading) circuit 402 Spreading code # 1 to #n 403 Weighted in-phase circuit 404 SIR measurement circuit 4041 base station conversion means 405 comparison circuit 406 data demodulation circuit 407 TPC bit generation circuit 408 broadcast channel generation circuit 4081 base station conversion means 409 data modulation circuit 410 spread modulation Keying circuit 411 Antenna 412 Switching center interface 501 Despreading circuit 502 Data demodulation circuit 503 Arithmetic circuit 5031 Mobile station conversion means 5032 Mobile station storage means 504 Display circuit 5041 Mobile station display means 5042 Mobile station switching means 505 Operation circuit 5051 Key button 5052 Speaker 5053 Microphone 506 Data modulation circuit 507 Spreading code # 1 508 Power amplification circuit 509 Access channel generation circuit 510 Antenna

Claims (7)

[Claims] 1. A mobile communication system in which a base station and a plurality of mobile stations exist in a serving cell, and these mobile stations perform radio communication with the base station by a W-CDMA method. In the two types of transmission power control, control and closed-loop transmission power control, the interference power measured at the base station is
Based on SIR (desired received power to interference power ratio), the base station determines communicable bit rate information and determines whether communication can be continued. The mobile station converts communication service information to be performed into bit rate information. A mobile communication system, wherein the mobile communication system converts and transmits the converted bit rate information to a base station and displays bit rate information and a determination result from the base station on a display. The base station includes a broadcast channel generation circuit having base station conversion means for determining communicable bit rate information in open-loop transmission power control. 2. The communication system according to claim 1, further comprising an SIR measurement circuit having base station conversion means for determining rate information, and a comparison circuit for judging whether a communication service to be used by the user can actually be continued. Mobile communication system. 3. The base station, when the power supply of the mobile station is turned on, adds communicable bit rate information to the power information of the frame format of the broadcast channel and transmits it as a downlink signal to the mobile station. When the mobile station starts continuous communication, the TPC bit (transmission power control bit) of the frame format of the information signal channel is used to transmit communicable bit rate information and determination result information as to whether communication can be continued.
3. The mobile communication system according to claim 1, wherein the mobile communication system transmits the signal as a downlink signal to a mobile station. In the closed loop transmission power control, the mobile station transmits bit rate information transmitted by a downlink signal from the base station, bit rate information transmitted in the closed loop transmission power control, and determination result information. Mobile station conversion means for displaying on a display, and an arithmetic circuit having a mobile station storage means for storing the information, the information input to the mobile station storage means when the information has been updated 4. The mobile communication system according to claim 1, further comprising a mobile station switching means for reading and a display circuit having a mobile station display means for displaying on a display. 5. The mobile station has an operation circuit having a key button for informing a base station of a communication service to be used as bit rate information when starting continuous communication, and information generated by the mobile station. The signal is added to an information signal of a frame format of a signal channel and transmitted as an uplink signal to a base station.
5. The mobile communication system according to any one of 4. 6. A data demodulation for determining bit rate information added to an information signal of a frame format of an information signal channel transmitted by an uplink signal when a mobile station starts continuous communication. The mobile communication system according to claim 1, further comprising a circuit. 7. The bit rate information determined by the base station is measured by the SIR measurement circuit of the base station in the open loop transmission power control, the interference power in the power information of the frame format of the broadcast channel, and in the closed loop transmission power control. The determination result information is based on bit rate information from the mobile station and bit rate information determined by the base station based on the SIR (desired received power to interference power ratio) to be performed. A mobile communication system according to claim 1.