JP2006165645A - Wireless base station apparatus, wireless base station control apparatus, mobile station, and wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless base station apparatus capable of preventing another mobile station whose transmission power cannot be increased from being faulty in the case that one mobile station whose transmission power cannot be decreased accesses the wireless base station apparatus. <P>SOLUTION: The wireless base station apparatus includes: a transmission power control means for generating a transmission power control signal to control transmission power of mobile stations; a disabled increase identification means that identifies the mobile stations incapable of increasing the transmission power among the mobile stations when the transmission power control means is used to command an increase in the transmission power to the mobile stations; a disabled decrease identification means that identifies disabled decrease mobile stations incapable of decreasing the transmission power when the transmission power control means is used to command a decrease in the transmission power to the mobile stations; and an access control means that generates an access control signal for controlling access of the disabled decrease mobile stations to the wireless base station apparatus when the disabled decrease identification means identifies the disabled decrease mobile stations. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio base station apparatus, a radio base station control apparatus, a mobile station, and a radio communication system, and in particular, a mobile station that cannot reduce transmission power cannot increase transmission power by accessing the radio base station apparatus. The present invention relates to a CDMA radio base station apparatus, a radio base station control apparatus, a mobile station, and a radio communication system that prevent or reduce the failure of mobile stations.

  In a conventional radio base station apparatus, when allocating a predetermined transmission power to a mobile station that is newly accessed or a mobile station that requests an increase in transmission power, the mobile station that is already communicating is not disturbed. The transmission power of each mobile station is optimally controlled (see, for example, Patent Document 1).

  Also, when the total downlink transmission power of the base station is greater than or equal to a predetermined value, the interference power of the uplink is greater than or equal to a predetermined value, or the spreading code resource allocated in the CDMA scheme is less than or equal to a predetermined value. The mobile station that is newly accessed is restricted from calling, and the mobile station that is handed over is given priority (see, for example, Patent Document 2).

JP 2001-217774 A (pages 5 to 8, FIG. 1) JP 2002-232941 A (pages 8 to 13 and FIG. 3)

  A conventional radio base station performs transmission power control on each mobile station, and the mobile station communicates with transmission power instructed by the radio base station. As a result, the base station adjusts the received power from each mobile station, and a plurality of mobile stations can communicate with each other at the same frequency at the same frequency. However, such an operation method is based on the premise that transmission power control for each mobile station is possible. For example, when the distance from a CDMA radio base station is extremely small, the dynamic range of transmission power If a mobile station that cannot further reduce transmission power due to restrictions on the mobile station (non-decreasing mobile station) accesses the radio base station, other mobile stations that cannot increase transmission power due to restrictions on the dynamic range of transmission power (mobile stations that cannot increase) will fail. There was a problem of receiving. That is, when a non-decreasing mobile station accesses a radio base station, there is a problem that if the non-increasing mobile station starts access, the call is lost, and if the non-increasing mobile station is accessing, there is a problem that communication is interrupted. .

  Also, even if a mobile station gradually approaches a CDMA radio base station being accessed and eventually the distance between the two becomes extremely small and the mobile station is instructed to reduce the transmission power by the radio base station, the transmission power If a mobile station that cannot further reduce transmission power due to restrictions on the dynamic range of the mobile station (a mobile station that cannot be reduced) is transmitted to another mobile station that cannot increase transmission power due to restrictions on the dynamic range of the transmission power (a mobile station that cannot increase) There was a problem of becoming an obstacle. In other words, if a non-decreasing mobile station continues to access the radio base station, the mobile station that cannot increase cannot call up, and the mobile station that cannot increase cannot access the communication. there were.

  The present invention has been made to solve the above-described problems, and a mobile station that is located at an extremely small distance from the radio base station apparatus and cannot reduce transmission power accesses the radio base station apparatus. An object of the present invention is to obtain a CDMA radio base station apparatus, radio base station control apparatus, mobile station, and radio communication system that prevent or reduce the failure of other mobile stations whose transmission power cannot be increased.

  The radio base station apparatus according to the present invention is a radio base station apparatus that communicates with a plurality of mobile stations, a transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station, and the transmission power A non-reducible identifying means for identifying a non-reducible mobile station that cannot reduce the transmission power even if the mobile station is instructed to reduce the transmission power using the control means, and a radio base station apparatus for the non-reducible mobile station And an access control means for generating an access control signal for controlling access to the mobile phone.

  The CDMA radio base station apparatus according to the present invention is a CDMA radio base station apparatus, wherein the first transmission power evaluation means and the second transmission power evaluation means for evaluating the transmission power of the mobile station, A delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal received from a mobile station, and a radio base station from the mobile station calculating based on the propagation delay time measured by the delay time measuring means Delay comparison means for comparing the distance to the apparatus with a predetermined distance, non-increase identifying means for identifying non-increasable mobile stations whose transmission power cannot be increased from among the mobile stations based on the first transmission power evaluation means, and transmission A non-decreasing mobile station whose power cannot be reduced and whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is output to the second transmission power evaluation unit and the delay comparison unit, respectively. If the non-decreasing identification means identifies the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station, this movement is made to the non-decreasing mobile station. And an access control means for generating an access control signal for controlling access from the station.

  In the radio base station control apparatus according to the present invention, a radio base station control apparatus that controls a plurality of radio base station apparatuses, wherein the mobile station communicates with the radio base station and controls transmission power of the mobile station Transmission power control means for generating a power control signal and non-decreasing mobile stations that cannot reduce transmission power even if a command is given to the mobile station to reduce transmission power using the transmission power control means. A non-decreasing identification means and an access control means for generating an access control signal for controlling access to the radio base station apparatus for the non-decreasing mobile station are provided.

  The mobile station according to the present invention is a mobile station that communicates with a radio base station apparatus, and the non-decreasing identification means provided on the radio base station apparatus side designates a non-decreasing mobile station that cannot reduce transmission power of the mobile station. An access processing means for receiving an access control signal that is generated by an access control means provided on the radio base station apparatus side and that controls access from a non-decreasing mobile station and that performs predetermined processing based on the access control signal. It is equipped with.

  The mobile station according to the present invention is a mobile station that communicates with a CDMA radio base station apparatus, and the non-increase identifying means provided in the radio base station apparatus wirelessly transmits the non-increase mobile station that cannot increase the transmission power. Based on the first transmission power evaluation means for evaluating the transmission power of the mobile station included in the base station apparatus, the mobile station is identified from among the mobile stations, and the non-decreasing identification means included in the radio base station apparatus reduces the transmission power. A second non-decreasing mobile station that cannot be reduced and the distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance, and a second transmission power evaluation unit that evaluates the transmission power of each mobile station provided in the radio base station apparatus; The distance from the mobile station to the radio base station device calculated based on the propagation delay time of the radio signal received from the mobile station measured by the delay time measuring means provided in the radio base station device Access from a non-decreasing mobile station generated by the access control means provided in the radio base station device when it is identified from the mobile stations based on the output of the delay comparison means provided in the radio base station device by comparing with a fixed distance An access processing means for receiving an access control signal for controlling the access control means and performing a predetermined process based on the access control signal is provided.

  The radio communication system according to the present invention is a radio communication system having a radio base station apparatus and a plurality of mobile stations, wherein the radio base station apparatus controls transmission power of the mobile station to the mobile station Transmission power control means for generating a power control signal and non-decreasing mobile stations that cannot reduce transmission power even if a command is given to the mobile station to reduce transmission power using the transmission power control means. A non-decreasing identification means and an access control means for generating an access control signal for controlling access to the radio base station apparatus for the non-decreasing mobile station are provided.

  In the radio communication system according to the present invention, a radio having a plurality of radio base station apparatuses, a radio base station control apparatus that controls these radio base station apparatuses, and a plurality of mobile stations that communicate with the radio base station apparatus In the communication system, the radio base station control device generates a transmission power control signal for controlling a transmission power of the mobile station for the mobile station, and uses the transmission power control means to transmit the transmission power control signal to the mobile station. On the other hand, a non-decreasing identification means for identifying a non-decreasing mobile station from which the transmission power cannot be reduced even if the transmission power is commanded to be reduced, and access control for controlling the non-decreasing mobile station to access the radio base station apparatus And an access control generating means for generating a signal.

  The radio base station apparatus according to the present invention includes transmission power control means for generating a transmission power control signal for controlling transmission power of a mobile station, and instructs the mobile station to reduce transmission power using the transmission power control means. A non-reducible identifying means for identifying a non-reducible mobile station that cannot reduce transmission power from among mobile stations, and an access control means for generating an access control signal for controlling the non-reducible mobile station to access a radio base station device; Therefore, it is possible to obtain a radio base station apparatus that prevents or reduces the failure of other mobile stations that cannot increase transmission power.

  A radio base station apparatus according to the present invention includes a first transmission power evaluation unit and a second transmission power evaluation unit that evaluate transmission power of a mobile station, and a desired wave obtained by demodulating a radio signal received from the mobile station. Delay time measuring means for measuring a propagation delay time of a signal, and delay comparing means for comparing a predetermined distance with a distance from the mobile station to the radio base station apparatus calculated based on the propagation delay time measured by the delay time measuring means A non-increasing mobile station that cannot increase the transmission power based on the first transmission power evaluation unit, and a non-increasing identification unit that can not reduce the transmission power and A non-decreasing identification means for identifying a non-decreasing mobile station whose distance to the mobile station is smaller than a predetermined distance from among the mobile stations based on outputs of the second transmission power evaluation means and the delay comparing means, respectively An access control means for generating an access control signal for controlling access from the mobile station to the non-decreasing mobile station when the stage identifies the non-increasing mobile station and the non-decreasing identifying means identifies the non-decreasing mobile station; Therefore, it is possible to obtain a CDMA radio base station apparatus that prevents or reduces the failure of other mobile stations whose transmission power cannot be increased.

  A radio base station control apparatus according to the present invention is a radio base station control apparatus that controls a plurality of radio base station apparatuses, and that controls transmission power of the mobile station for a mobile station communicating with the radio base station. A transmission power control means for generating a control signal, and a decrease for identifying a non-decreasing mobile station from among the mobile stations that cannot reduce the transmission power even if the transmission power control means is used to instruct the mobile station to reduce the transmission power. Since the mobile station has the non-recognizable identification means and the access control means for generating an access control signal for controlling the access to the radio base station apparatus to the non-decreasing mobile station, other mobile stations that cannot increase the transmission power will be damaged. It is possible to obtain a radio base station controller that prevents or reduces.

  The mobile station according to the present invention is a mobile station that communicates with a radio base station apparatus, and the non-decreasing identification means provided on the radio base station apparatus side selects a non-decreasing mobile station that cannot reduce transmission power among the mobile stations. The access processing means that receives the access control signal that is generated by the access control means provided on the radio base station apparatus side and controls the access from the non-decreasing mobile station, and that performs predetermined processing based on the access control signal Thus, it is possible to obtain a mobile station that prevents or reduces the failure of other mobile stations that cannot increase transmission power.

  The mobile station according to the present invention is a mobile station that communicates with a CDMA radio base station apparatus, and the non-increase identifying means provided in the radio base station apparatus transmits an increase non-capable mobile station that cannot increase transmission power to the radio base station. Based on the first transmission power evaluating means for evaluating the transmission power of the mobile station provided in the station apparatus, the non-decreasing identification means provided in the radio base station apparatus cannot be reduced by the mobile station based on the first transmission power evaluation means. A second non-decreasing mobile station whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance, second transmission power evaluation means for evaluating the transmission power of the mobile station provided in each radio base station apparatus, and radio The distance from the mobile station to the radio base station apparatus calculated based on the propagation delay time of the radio signal received from the mobile station measured by the delay time measuring means provided in the base station apparatus and a predetermined distance And the access from the non-reducible mobile station generated by the access control means provided in the radio base station apparatus is controlled by identifying the mobile station based on the output of the delay comparison means provided in the radio base station apparatus. Since the access processing means for receiving the access control signal and performing a predetermined process based on the access control signal is provided, a CDMA radio that prevents or reduces the failure of other mobile stations that cannot increase the transmission power is provided. A mobile station that communicates with the base station apparatus can be obtained.

  A radio communication system according to the present invention is a radio communication system having a radio base station apparatus and a plurality of mobile stations, wherein the radio base station apparatus controls transmission power of the mobile station to the mobile station. A transmission power control means for generating a control signal, and a decrease for identifying a non-decreasing mobile station from among the mobile stations that cannot reduce the transmission power even if the transmission power control means is used to instruct the mobile station to reduce the transmission power. Since the mobile station has the non-recognizable identification means and the access control means for generating an access control signal for controlling the access to the radio base station apparatus to the non-decreasing mobile station, other mobile stations that cannot increase the transmission power will be damaged. A wireless communication system that prevents or reduces can be obtained.

  A wireless communication system according to the present invention includes a plurality of wireless base station devices, a wireless base station control device that controls these wireless base station devices, and a plurality of mobile stations that communicate with the wireless base station device. A radio base station control device is a system for generating a transmission power control signal for controlling a transmission power of the mobile station for the mobile station, and for the mobile station using the transmission power control means. Non-decreasing identification means for identifying a non-decreasing mobile station that cannot reduce transmission power even if a command to reduce transmission power is given, and an access control signal for controlling the non-decreasing mobile station to access the radio base station device Therefore, it is possible to obtain a wireless communication system that prevents or reduces the failure of other mobile stations that cannot increase transmission power.

Embodiment 1 FIG.
FIG. 1 is a block diagram illustrating the configuration of a CDMA radio base station apparatus according to Embodiment 1 of the present invention. In FIG. 1, a mobile station 101 that cannot increase is an already connected mobile station that is accessing the CDMA radio base station apparatus 200. The mobile station 101 is arranged near the edge of the service area covered by the radio base station apparatus 200, and the transmission power of the mobile station 101 is limited in the variable range, so the transmission power cannot be further increased. The non-decreasing mobile station 102 is a newly connected mobile station that starts access to the radio base station apparatus 200. It is assumed that the mobile station 102 is arranged in the vicinity of the radio base station apparatus 200 and the transmission power cannot be further reduced because the variable range of the transmission power of the mobile station 102 is limited. It is assumed that the mobile station 101 receives a communication failure such as communication disconnection due to the start of access by the mobile station 102. 1 shows only the mobile stations 101 and 102, there may be another mobile station (not shown) accessing the radio base station apparatus 200.

  In the mobile stations 101 and 102, in order to identify the uplink communication channel from each mobile station to the radio base station apparatus 200, each mobile station 101 and 102 is a radio modulated by the CDMA method using a unique spreading code. A signal is transmitted.

  Radio signals transmitted from the mobile stations 101 and 102 are received by the receiving antenna 201 of the radio base station apparatus 200 and output as a received signal to the high frequency receiving unit 211 of the high frequency unit 210. Here, the radio signal transmitted from each mobile station reaches the reception antenna 201 of the radio base station apparatus 200 via a plurality of paths. The plurality of paths include a direct wave path that propagates directly through the space from the antenna of each mobile station to the receiving antenna 201 of the radio base station apparatus 200, a reflected wave path that reflects off the wall or ground of the building, the edge of the building, etc. There are diffracted wave paths that diffracted at, and paths that include both reflection and diffraction. Therefore, the radio signal transmitted from each mobile station is received by the receiving antenna 201 with a plurality of propagation delay times required for the radio signal to propagate through a plurality of paths.

  In the high frequency receiving unit 211, a carrier wave is regenerated using the received signal output from the receiving antenna 201, and the received signal is synchronously detected and converted into a baseband signal using the carrier wave. The AD converter 221 converts a baseband signal that is an analog signal output from the high-frequency receiving unit 211 into a digital signal. The digital signal output from the AD converter 221 is output to the path detection unit 231 and the despreading unit 232.

  The path detection unit 231 detects timing for synchronizing a unique spreading code for each of the mobile stations 101 and 102 with respect to the digital signal output from the AD converter 221. The timing information detected by the path detection unit 231 is output to the despreading unit 232 and the delay time calculating unit 250 that is a delay time measuring unit.

  In the delay time calculation unit 250 that is a delay time measuring unit, the propagation delay time of the radio signal from each of the mobile stations 101 and 102 to the reception antenna 201 of the radio base station apparatus 200 based on the timing detected by the path detection unit 231. Is calculated. When there are a plurality of radio signal propagation paths from each mobile station to the receiving antenna 201, the smallest propagation delay time is identified as the direct wave propagation delay time. The smallest propagation delay time information calculated by the delay time calculation unit 250 is output to the distance determination unit 262 which is a delay comparison unit and constitutes a part of the non-decreasing identification unit.

  A distance determination unit 262 that is a delay comparison unit and constitutes a part of the decrease impossibility identification unit is provided in the communication control unit 261 in the call control unit 260. The distance determination unit 262 calculates the distance from each mobile station to the reception antenna 201 of the radio base station apparatus 200 based on the smallest propagation delay time information calculated by the delay time calculation unit 250. Further, the distance determination unit 262 stores a predetermined distance value, and determines the magnitude relationship between the calculated distance value and the stored predetermined distance value. Here, the predetermined distance is a distance that serves as a reference for determining whether or not the position of each of the mobile stations 101 and 102 is in the vicinity of the radio base station apparatus 200.

  In the despreading unit 232, the digital signal output from the AD converter 221 is despread demodulated by performing an exclusive OR operation in a state in which the digital signal is synchronized with the spreading code at the timing detected by the path detection unit 231. Is done. The despread demodulated signal despread by the despreading unit 232 is a desired wave signal and is output to the RAKE receiving unit 233 and the SIR measuring unit 251 that evaluates the transmission power of the mobile station. The SIR measurement unit 251 and the SIR determination unit 263, which will be described later, constitute a second transmission power evaluation unit. There are also a plurality of despread demodulated signals obtained by demodulating radio signals received by propagating through a plurality of paths, and have the same delay time as the corresponding radio signals.

  The RAKE receiving unit 233 corrects and synthesizes the delay times of the plurality of despread demodulated signals output from the despreading unit 232. The despread demodulated signal combined in RAKE receiving unit 233 is output to decoding unit 241.

  The decoding unit 241 performs necessary information by performing turbo / Viterbi decoding processing, deinterleaving processing, rate dematching processing, CRC (Cyclic Redundancy Check) processing, etc., on the despread demodulated signal output from the RAKE receiving unit 233. Is extracted. Information extracted in the decoding unit 241 is output to the call control unit 260. Information output from the decoding unit 241 includes identification information of the mobile stations 101 and 102, communication information transmitted from the mobile station 101 to a communication destination, and the like. Communication information of the mobile station 101 is transmitted to a radio network control device (not shown) connected to the core network via the call control unit 260. As described above, the information output from the decoding unit 241 is transmitted to the other station (not shown) with which the mobile station 101 communicates via the call control unit 260, the radio network control device, and the core network.

  In the SIR measurement unit 251 that constitutes a part of the second transmission power evaluation means, a desired wave signal power to interference power ratio (hereinafter referred to as SIR) which is a power ratio of the desired wave signal to the interference wave. SIR: Signal-to -Interference power ratio is measured. Here, the power of the interference wave is a power obtained by subtracting the power of the desired wave signal from the power of the signal input to the despreading unit 232. The SIR measured by the SIR measurement unit 251 is output to the SIR comparison unit 253 and the SIR determination unit 263.

  The SIR determination unit 263 that constitutes the remaining part of the second transmission power evaluation unit and the remaining part of the non-decreasing identification unit is provided in the communication control unit 261 in the call control unit 260. The SIR determination unit 263 determines the magnitude relationship between the SIR measured by the SIR measurement unit 251 and the predetermined SIR stored in the SIR determination unit 263. Here, the predetermined SIR stored in the SIR determination unit 263 is a reference value used for evaluating the transmission power of the mobile station. When the distance determination unit 262 determines that the mobile station 102 is in the vicinity of the radio base station device 200 and the SIR determination unit 263 determines that the SIR measured by the SIR measurement unit 251 exceeds the reference value, It is identified that the mobile station 102 is too close to the radio base station apparatus 200 and cannot transmit power. That is, the non-decreasing mobile station whose transmission power cannot be reduced from among a plurality of mobile stations (not shown) accessing the radio base station apparatus 200 by the distance judging unit 262 and the SIR judging unit 263 constituting the non-decreasing identifying means. 102 is identified.

  The SIR comparison unit 253 compares the SIR measured by the SIR measurement unit 251 with the SIR held in the target SIR holding unit 252 provided in the call control unit 260. Both comparison results output from the SIR comparison unit 253 are output to the TPC generation unit 254 which is transmission power control means of the mobile station. Here, the SIR held in the target SIR holding unit 252 is a common reference value of SIRs in the radio signals of the mobile stations 101 and 102 received by the radio base station apparatus 200, and the SIR is smaller than this reference value. Control is performed to increase the transmission power of the mobile station for the mobile station and decrease the transmission power of the mobile station for a mobile station having an SIR larger than the reference value.

  The TPC generation unit 254 that is a transmission power control unit of the mobile station, based on the comparison result output from the SIR comparison unit 253, transmits transmission power control data (hereinafter referred to as transmission power control data) that instructs increase / decrease of the transmission power of the mobile station. And TPC data, TPC (Transmission Power Control) is generated. That is, when the SIR measured by the SIR measuring unit 251 is smaller than the predetermined SIR held by the target SIR holding unit 252, the transmission power of the mobile station 101 is increased, and when the SIR is larger, the transmission power of the mobile station 101 is reduced. TPC data for commanding is generated. For the mobile station 102 that starts access, transmission power control is not performed at the call processing stage, and TPC data is not generated. The TPC data generated in the TPC generation unit 254 is a coding unit 242 and a transmission power control signal history storage unit that constitutes a first transmission power evaluation unit, and a TPC determination unit that constitutes an increase impossible identification unit H.264.

  A TPC determination unit 264 that is a transmission power control signal history storage unit that constitutes a first transmission power evaluation unit and that constitutes an increase impossibility identification unit is provided in the communication control unit 261 in the call control unit 260. The TPC determination unit 264 stores generation history information of TPC data generated by the TPC generation unit 254. Further, it is identified from the generation history information of the TPC data whether or not a command for increasing or decreasing the transmission power of the mobile station has been continuously generated a predetermined number of times. As will be described later, when the mobile station 101 cannot increase the transmission power, the TPC generation unit 254 continuously generates TPC data instructing to increase the transmission power of the mobile station 101, and the generation history information is the TPC determination unit 264. Is memorized. When the TPC determination unit 264 detects that TPC data instructing an increase in transmission power is continuously generated for a predetermined number of times or more, the mobile station 101 to be controlled by the TPC data cannot increase the transmission power. Determine. That is, the TPC determination unit 264, which is a first transmission power evaluation unit and an increase impossibility identification unit, transmits transmission power from among a plurality of mobile stations (not shown) accessing the radio base station apparatus 200. A non-increasable mobile station 101 that cannot be increased is identified.

  The communication control unit 261 includes a distance determination unit 262, an SIR determination unit 263, and a TPC determination unit 264. In the communication control unit 261, when the newly connected mobile station 102 that newly accesses the radio base station apparatus 200 and the already connected mobile station 101 being accessed satisfy a predetermined condition, the radio base station apparatus 200 A command for generating an access control signal that restricts access to the access control unit 266 that is an access control means is output.

  The access control unit 266 that is an access control unit generates an access control signal for performing predetermined access control on the mobile station 102 based on a command output from the communication control unit 261. The access control signal output from access control section 266 is output to encoding section 242. The access control signal for performing predetermined access control here restricts access to the mobile station 102 from the mobile station 102 to the radio base station apparatus 200, that is, a handover command to a different frequency, or a call or a call. It is assumed that the command is for registering the location and prohibiting / interrupting the call state.

  The transmission data generation unit 267 is provided in the call control unit 260. In the transmission data generation unit 267, digital data such as a voice signal and an image signal from a partner station (not shown) with which the mobile station 101 communicates via the radio base station apparatus 200, and all data from the radio base station apparatus 200 are transmitted. Digital data such as broadcast information for the mobile station is generated. The digital data generated by the transmission data generation unit 267 is output to the encoding unit 242.

  The encoding unit 242 performs CRC (Cyclic Redundancy Check) processing on the TPC data output from the TPC generation unit 254, the access control signal output from the access control unit 266, and the digital data output from the transmission data generation unit 267. Are combined by performing error correction code assignment processing, turbo / Viterbi encoding processing, interleaving processing, rate matching processing, and the like. The synthesized signal synthesized by the encoding unit 242 is output to the spreading unit 234.

  In the spreading unit 234, an exclusive OR of the spreading code unique to the radio base station 200 and the spreading code unique to the mobile stations 101 and 102 that are communication partners is obtained for the composite signal output from the coding unit 242. Spread modulated. A spread modulation signal which is a digital signal spread-modulated in spreader 234 is output to DA converter 222.

  The DA converter 222 converts the digital signal output from the diffusion unit 234 into an analog signal. The analog signal converted by the DA converter 222 is output to the high frequency transmission unit 212 of the high frequency unit 210.

  In the high frequency transmission unit 212, the carrier wave is modulated using the analog signal output from the DA converter 222. The modulation signal modulated by the high frequency transmission unit 212 is output to the transmission antenna 202.

  In the transmission antenna 202, the modulation signal output from the high-frequency transmission unit 212 is radiated to the space as a transmission signal. A transmission signal radiated from the transmission antenna 202 is transmitted to the mobile stations 101 and 102.

Next, the operation will be described.
FIG. 2 is a flowchart for explaining the operation of the CDMA radio base station apparatus according to Embodiment 1 of the present invention.

  First, an operation for the mobile station 101 that is an already connected mobile station that is accessing the radio base station apparatus 200 will be described.

  A radio signal transmitted from the mobile station 101 is received by the reception antenna 201 of the radio base station apparatus 200. The reception signal output from the reception antenna 201 is converted into a baseband signal by the high frequency reception unit 211. The analog baseband signal output from the high frequency receiver 211 is converted into a digital signal by the AD converter 221. The digital signal output from the AD converter 221 is despread and demodulated with the spreading code synchronized with the digital signal at the despreading unit 232 at the timing detected by the path detection unit 231. The despread demodulated signal output from the despreading unit 232 is synthesized by the RAKE receiving unit 233 after correcting the delay times of a plurality of desired wave signals. Necessary information is extracted by the decoding unit 241 from the combined signal output from the RAKE receiving unit 233. The information extracted by the decoding unit 241 is transmitted to the other station (not shown) of the communication destination via the call control unit 260.

  The SIR measurement unit 251 measures the SIR for the desired wave signal output from the despreading unit 232. The SIR comparison unit 253 compares the SIR measured by the SIR measurement unit 251 with the common reference value of the SIR held by the target SIR holding unit 252 and generates TPC data by the TPC generation unit 254 based on the comparison result. Is done. The reception quality of the transmission signal from the mobile station is determined for each required QoS (Quality of Service). For example, when all the mobile stations use voice, the required QoS becomes equal. Therefore, in order to ensure the communication quality of the mobile station 101, radio signals of a plurality of mobile stations received by the radio base station apparatus 200 are used. It is desirable that the SIR is uniform. In this case, the transmission power of the mobile station 101 is controlled using the TPC data so that the SIR of the radio signal of each mobile station is uniform.

  The mobile station 101 is near the edge of the service area covered by the radio base station 200, and the distance between the mobile station 101 and the radio base station 200 is large. By the way, the propagation loss of a radio signal in free space is proportional to the square of the distance. Propagation loss in urban areas is even greater. Therefore, the radio signal from the mobile station 101 received by the radio base station 200 is greatly attenuated due to propagation loss. As a result, it is assumed that the SIR measured by the SIR measuring unit 251 is lower than the SIR of the reference value held by the target SIR holding unit 252. The TPC generation unit 254 generates TPC data for instructing an increase in transmission power of the mobile station 101, and the digital data generated by the transmission data generation unit 267 is output to the encoding unit 242. Data output to the encoding unit 242 is transmitted to the mobile station 101 via the spreading unit 234, the DA converter 222, the high frequency transmission unit 212, and the transmission antenna 202.

  The mobile station 101 receives TPC data instructing an increase in transmission power and tries to increase the transmission power. However, the transmission power cannot be increased because the variable range of the transmission power is limited. Therefore, the TPC generation unit 254 of the radio base station 200 continuously generates TPC data instructing an increase in transmission power of the mobile station 101. Here, TPC data generation history information is stored in the TPC determination unit 264. When the TPC determination unit 264 detects that the TPC data instructing the increase in transmission power is continuously generated for a predetermined number of times or more, the TPC determination unit 264 determines that the mobile station to be controlled by the TPC data cannot increase the transmission power. To do. That is, the TPC determining unit 264 that is the first transmission power evaluation unit and the non-increase identification unit cannot increase the transmission power from among the plurality of mobile stations that access the radio base station apparatus 200. The non-increasable mobile station 101 is identified. This corresponds to the process of step 40 in FIG.

  The delay time calculation unit 250 calculates the propagation delay time from the mobile station 101 to the reception antenna 201 of the radio base station apparatus 200 based on the timing detected by the path detection unit 231. The distance determination unit 262 calculates the distance from the mobile station 101 to the reception antenna 201 of the radio base station apparatus 200 based on the smallest propagation delay time information calculated by the delay time calculation unit 250, and calculates the calculated distance value. And the predetermined distance value stored in the distance determination unit 262 is determined. The distance value calculated for the mobile station 101 is larger than the distance value stored in the distance determination unit 262, and it is identified that the mobile station 101 is not in the vicinity of the radio base station apparatus 200.

  Further, the SIR determination unit 263 determines the magnitude relationship between the SIR measured by the SIR measurement unit 251 and the predetermined SIR stored in the SIR determination unit 263. The SIR determination unit 263 determines that the SIR measured for the mobile station 101 is smaller than a predetermined SIR stored in the SIR determination unit 263. Together with the determination result of the distance determination unit 262, the mobile station 101 is identified as not in a state where the transmission power cannot be reduced. That is, it is identified that the mobile station 101 is not a non-decreasing mobile station.

  Next, an operation for the mobile station 102 which is a newly connected mobile station that starts access to the radio base station apparatus 200 will be described.

  In step 10, the mobile station 102 which is a newly connected mobile station starts access to the radio base station apparatus 200. Similarly to the mobile station 101, a radio signal including a call request transmitted from the mobile station 102 is received by the reception antenna 201 of the radio base station apparatus 200. The reception signal output from the reception antenna 201 is converted into a baseband signal by the high frequency reception unit 211. The analog baseband signal output from the high frequency receiver 211 is converted into a digital signal by the AD converter 221. The digital signal output from the AD converter 221 is despread and demodulated with the spreading code synchronized with the digital signal at the despreading unit 232 at the timing detected by the path detection unit 231.

  In step 20, it is determined whether or not the SIR of the mobile station 102 which is a newly connected mobile station exceeds a predetermined value. The SIR determination unit 263 determines the magnitude relationship between the SIR measured by the SIR measurement unit 251 and the predetermined SIR stored in the SIR determination unit 263. Since the SIR measured for the mobile station 102 is larger than the predetermined SIR stored in the SIR determination unit 263, the process proceeds to step 30. On the other hand, when the measured SIR is smaller than the predetermined SIR stored in the SIR determination unit 263, it is determined that there is no connected mobile station that is subject to communication failure due to the start of access by the mobile station 102, and the process proceeds to step 60.

  In step 30, it is determined whether or not the distance from the radio base station apparatus 200 to the mobile station 102 which is a newly connected mobile station is less than a predetermined distance value. The delay time calculation unit 250 calculates the propagation delay time from the mobile station 102 to the reception antenna 201 of the radio base station apparatus 200 based on the timing detected by the path detection unit 231. The distance determination unit 262 calculates the distance from the mobile station 102 to the reception antenna 201 of the radio base station apparatus 200 based on the smallest propagation delay time information calculated by the delay time calculation unit 250, and calculates the calculated distance value. And a distance relationship stored in the distance determination unit 262 is determined. Since the distance value calculated for the mobile station 102 is smaller than the predetermined distance value stored in the distance determination unit 262, it is identified that the mobile station 102 is in the vicinity of the radio base station apparatus 200, and step 40 is performed. Proceed to As described above, using the determination result of the SIR determination unit 263 in step 20 and the determination result of the distance determination unit 262 in step 30, the mobile station 102 is identified as a non-decreasing mobile station that cannot reduce transmission power. . On the other hand, if the calculated distance value is larger than the predetermined distance value stored in the distance determination unit 262, it is determined that there is no connected mobile station that is subject to communication failure due to the start of access by the mobile station 102, and step 60 is performed. Proceed to

  Since mobile station 102 is in a call processing stage for starting access to radio base station apparatus 200, transmission power control is not performed, and TPC data is not generated in TPC generation section 254.

  In step 40, it is determined whether or not there is an already connected mobile station for which a transmission power increase command has been issued continuously for a predetermined number of times or more. As described in the operations of the TPC generation unit 254 and the TPC determination unit 264 for the mobile station 101 that is an already connected mobile station, the mobile station 101 cannot increase the transmission power, and the TPC generation unit 254 increases the transmission power of the mobile station 101. The TPC data for commanding is continuously generated. Then, the number of continuous generations of TPC data that commands an increase in transmission power exceeds a predetermined value. Here, TPC data generation history information is stored in the TPC determination unit 264. The TPC determination unit 264 detects that the number of continuous generations of TPC data instructing an increase in transmission power based on the generation history information of TPC data exceeds a predetermined value, and the mobile station 101 that is the target of control of TPC data transmits the transmission power. Is determined not to increase, and the process proceeds to step 50. As described above, using the determination result of the TPC determination unit 264 in step 40, the mobile station 101 is identified as a non-increasing mobile station that cannot increase the transmission power. On the other hand, if the number of continuous generations does not reach the predetermined value, it is determined that there is no connected mobile station that is subject to communication failure due to the start of access by the mobile station 102, and the process proceeds to step 60.

  In step 50, the radio base station apparatus 200 transmits data prohibiting a call to the mobile station 102 which is a newly connected mobile station. The distance determination unit 262 determines that the value of the distance from the mobile station 102 to the reception antenna 201 of the radio base station apparatus 200 is smaller than the predetermined distance value, and the SIR determination unit 263 measures the SIR measurement unit. It is determined that the SIR of the mobile station 102 is greater than a predetermined value, and the TPC determination unit 264 continuously generates TPC data instructing to increase the transmission power of the mobile station 101 for a predetermined number of times or more. When detected, a command for generating an access control signal for restricting access to the radio base station apparatus 200 to the mobile station 102 is output to the access control unit 266. The access control unit 266 generates an access control signal that is a command for prohibiting the mobile station 102 from making a call to the radio base station apparatus 200 based on the command output from the communication control unit 261. An access control signal generated in the access control unit 266 is radiated to the space via the encoding unit 242, the spreading unit 234, the DA conversion unit 222, the high frequency transmission unit 212, and the transmission antenna 202, and is transmitted to the mobile station 102. .

  In step 60, the mobile station 102 which is a newly connected mobile station starts communication with the radio base station apparatus 200.

  In this way, the radio base station apparatus 200 identifies the non-decreasing mobile station 102 that is a newly connected mobile station that is in a position where the distance from the radio base station apparatus 200 is extremely small and cannot reduce the transmission power, and transmits the transmission power. When the non-increasing mobile station 101 that is an already connected mobile station that cannot be increased is identified, the mobile station 101 that cannot increase the transmission power is damaged by prohibiting the mobile station 102 from calling the radio base station apparatus 200. Can be prevented. Here, as the first transmission power evaluation means for evaluating the transmission power of the non-increasing mobile station 101 and the non-increase identifying means for identifying the non-increasing mobile station 101, transmission power control for instructing the mobile station to increase or decrease the transmission power A TPC determination unit 264 that is a transmission power control signal history storage unit that stores signal generation history information is used. In addition, as a second transmission power evaluation means for evaluating the transmission power of the non-decreasing mobile station 102, the SIR measurement unit 251 that measures the SIR that is the power ratio of the desired wave signal to the interference wave, and the SIR that the SIR measurement unit 251 measures. The SIR determination unit 263 is used to determine the magnitude relationship between the predetermined value and the predetermined value. Further, a distance determination unit 262 and an SIR determination unit 263 are used as non-decrease identifying means for identifying the non-decrease mobile station 102.

  The CDMA radio base station apparatus according to Embodiment 1 configured as described above receives the first transmission power evaluation means and the second transmission power evaluation means for evaluating the transmission power of the mobile station, and receives from the mobile station. A delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal; a distance from a mobile station to a radio base station device calculated based on the propagation delay time measured by the delay time measuring means; Delay comparison means for comparing with a predetermined distance, non-increase identifying means for identifying non-increasing mobile stations whose transmission power cannot be increased from among the mobile stations based on the first transmission power evaluation means, and transmission power cannot be reduced And a non-decreasing mobile station whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is identified from the mobile stations based on the outputs of the second transmission power evaluation means and the delay comparison means, respectively. When the non-decreasing identifying means and the non-decreasing identifying means identify the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station, the access from the mobile station to the non-decreasing mobile station is controlled. And an access control means for generating an access control signal, so that a non-reducible mobile station that cannot reduce transmission power accesses a radio base station apparatus and prevents a non-increasing mobile station that cannot increase transmission power from being damaged. A wireless base station apparatus of the system can be obtained.

Embodiment 2. FIG.
FIG. 3 is a block diagram illustrating the configuration of a CDMA radio base station apparatus according to Embodiment 2 of the present invention. FIG. 3 shows the configuration of the radio base station apparatus according to Embodiment 1, which is the transmission power control signal history storage unit constituting the first transmission power evaluation unit, and constitutes the non-increase identification unit. Instead of the TPC determination unit 264, an MS power determination unit 265 that is a transmission power information acquisition unit is provided. Here, MS means a mobile station. Each of the mobile stations 101 and 102 is provided with a means (not shown) for including its own transmission power information in a radio signal. The other configurations of the CDMA radio base station apparatus and mobile station are the same as those in FIG.

  An MS power determination unit 265 that is a transmission power information acquisition unit that constitutes a first transmission power evaluation unit and that constitutes an increase impossibility identification unit is provided in the communication control determination unit 261 and is connected to the decoding unit 241. The The mobile stations 101 and 102 transmit radio signals including transmission power information of the respective mobile stations. The MS power determination unit 265 acquires transmission power information of each mobile station from a desired wave signal obtained by demodulating radio signals transmitted from the mobile stations 101 and 102. Furthermore, the magnitude relationship between the acquired transmission power information and a predetermined value stored in the MS power determination unit 265 is determined. Here, the predetermined value is a reference value used for evaluating the transmission power of the mobile station. That is, the MS power determination unit 265 identifies that the mobile station 101 cannot increase the transmission power by determining that the acquired transmission power information of the mobile station 101 is smaller than a predetermined value. To do. Note that information other than the transmission power information output from the decoding unit 241 is the same as that of the first embodiment in that the other station (communication station) with which the mobile station 101 communicates via the call control unit 260, the radio network control device, and the core network ( (Not shown).

  The communication control unit 261 includes a distance determination unit 262, an SIR determination unit 263, and an MS power determination unit 265. The communication control unit 261 allows the mobile station 102 to access the radio base station apparatus 200 when the mobile station 102 that newly accesses the radio base station apparatus 200 and the mobile station 101 that is being accessed satisfy a predetermined condition. A command for generating an access control signal to be restricted is output to the access control unit 266 that is an access control means.

Next, the operation will be described.
FIG. 4 is a flowchart for explaining the operation of the CDMA radio base station apparatus according to Embodiment 2 of the present invention.

  First, an operation for the mobile station 101 that is an already connected mobile station that is accessing the radio base station apparatus 200 will be described.

  The mobile station 101 is near the edge of the service area covered by the radio base station 200, and the radio signal from the mobile station 101 received by the radio base station 200 is greatly attenuated due to propagation loss, as in the first embodiment. receive. As a result, it is assumed that the SIR measured by the SIR measuring unit 251 is lower than the SIR of the reference value held by the target SIR holding unit 252. The TPC generation unit 254 generates TPC data for instructing an increase in transmission power of the mobile station 101, and the digital data generated by the transmission data generation unit 267 is output to the encoding unit 242. Data output to the encoding unit 242 is transmitted to the mobile station 101 via the spreading unit 234, the DA converter 222, the high frequency transmission unit 212, and the transmission antenna 202.

  The mobile station 101 receives TPC data instructing an increase in transmission power and tries to increase the transmission power. However, the transmission power cannot be increased because the variable range of the transmission power is limited. That is, the mobile station 101 is transmitting a radio signal with the maximum output transmission power. The transmission power value of the mobile station 101 is identified from the transmission power information of the mobile station 101 acquired in the MS power determination unit 265, and the transmission power value that is the maximum output exceeds the predetermined value stored in the MS power determination unit 265. Is determined. As a result, it is determined that the mobile station that transmits with a transmission power value exceeding the predetermined value stored in the MS power determination unit 265 cannot increase the transmission power. That is, the MS power determination unit 265 that is the first transmission power evaluation unit and the non-increase identification unit can increase the transmission power from among a plurality of mobile stations that access the radio base station apparatus 200. The mobile station 101 that cannot be increased is identified. This corresponds to the process of step 41 in FIG.

  Other operations for mobile station 101 are the same as those described in the first embodiment.

  Next, an operation for the mobile station 102 which is a newly connected mobile station that starts access to the radio base station apparatus 200 will be described.

  The operations of Step 10, Step 20 and Step 30 are the same as the operations described in FIG.

  In step 41, it is determined whether or not there is an already connected mobile station that transmits with power exceeding a predetermined value. As described for the operation of the MS power determination unit 265 for the mobile station 101 which is an already connected mobile station, the mobile station 101 is in a state of transmitting a radio signal with the maximum output power, and the transmission power cannot be increased. The transmission power value of the mobile station 101 is identified from the transmission power information of the mobile station 101 acquired in the MS power determination unit 265, and the transmission power value that is the maximum output exceeds the predetermined value stored in the MS power determination unit 265. Therefore, the mobile station 101, which is an already connected mobile station that receives a communication failure, is identified by the start of access by the mobile station 102, which is a newly connected mobile station, and the process proceeds to step 50. Thus, using the determination result of the MS power determination unit 265 in step 41, the mobile station 101 is identified as a non-increasing mobile station that cannot increase the transmission power. On the other hand, if the transmission power value of the mobile station 101 does not exceed the predetermined value stored in the MS power determination unit 265, it is determined that there is no connected mobile station that is subject to communication failure due to the start of access by the mobile station 102. move on.

  In step 50, the radio base station apparatus 200 transmits data prohibiting a call to the mobile station 102 which is a newly connected mobile station. The distance determination unit 262 determines that the value of the distance from the mobile station 102 to the reception antenna 201 of the radio base station apparatus 200 is smaller than the predetermined distance value, and the SIR determination unit 263 measures the SIR measurement unit. The MS power determination unit 265 determines that the transmission power value of the mobile station 102 exceeds the predetermined value stored in the MS power determination unit 265. Then, a command for generating an access control signal for restricting access to the radio base station apparatus 200 to the mobile station 102 is output to the access control unit 266. The access control unit 266 generates an access control signal that is a command for prohibiting the mobile station 102 from making a call to the radio base station apparatus 200 based on the command output from the communication control unit 261. An access control signal generated in the access control unit 266 is radiated to the space via the encoding unit 242, the spreading unit 234, the DA conversion unit 222, the high frequency transmission unit 212, and the transmission antenna 202, and is transmitted to the mobile station 102. .

  Other operations of radio base station apparatus 200 for mobile station 102 are the same as the operations described in FIG. 2 of the first embodiment.

  In addition, the operation of the mobile station 102 is the same as the operation described in the first embodiment.

  In this way, the radio base station apparatus 200 identifies the non-decreasing mobile station 102 that is a newly connected mobile station that is in a position where the distance from the radio base station apparatus 200 is extremely small and cannot reduce the transmission power, and transmits the transmission power. When the non-increasing mobile station 101 that is an already connected mobile station that cannot be increased is identified, the mobile station 101 that cannot increase the transmission power is damaged by prohibiting the mobile station 102 from calling the radio base station apparatus 200. Can be prevented. Here, the first transmission power evaluation means for evaluating the transmission power of the non-increasing mobile station 101 and the non-increase identification means for identifying the non-increasing mobile station 101 are used to demodulate a radio signal including transmission power information transmitted by the mobile station. The MS power determination unit 265 that is a transmission power information acquisition unit that acquires transmission power information from the desired signal obtained in this manner is used. Further, as a second transmission power evaluation means for evaluating the transmission power of the non-decreasing mobile station 102, the SIR measurement unit 251 and the SIR measurement unit 251 that measure the SIR that is the power ratio of the desired wave signal to the interference wave are measured. An SIR determination unit 263 that determines the magnitude relationship between the SIR to be performed and a predetermined value is used. Further, a distance determination unit 262 and an SIR determination unit 263 are used as non-decrease identifying means for identifying the non-decrease mobile station 102.

  The CDMA radio base station apparatus according to the second embodiment configured as described above receives the first transmission power evaluation means and the second transmission power evaluation means for evaluating the transmission power of the mobile station, and receives from the mobile station. A delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal; a distance from a mobile station to a radio base station device calculated based on the propagation delay time measured by the delay time measuring means; Delay comparison means for comparing with a predetermined distance, non-increase identifying means for identifying non-increasing mobile stations whose transmission power cannot be increased from among the mobile stations based on the first transmission power evaluation means, and transmission power cannot be reduced And a non-decreasing mobile station whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is identified from the mobile stations based on the outputs of the second transmission power evaluation means and the delay comparison means, respectively. When the non-decreasing identifying means and the non-decreasing identifying means identify the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station, the access from the mobile station to the non-decreasing mobile station is controlled. And an access control means for generating an access control signal, so that a non-reducible mobile station that cannot reduce transmission power accesses a radio base station apparatus and prevents a non-increasing mobile station that cannot increase transmission power from being damaged. A wireless base station apparatus of the system can be obtained.

Embodiment 3 FIG.
FIG. 5 is a block diagram illustrating a configuration of a CDMA radio base station apparatus according to Embodiment 3 of the present invention. The configuration of radio base station apparatus 200 in FIG. 5 is obtained by deleting SIR determination section 263 from radio base station apparatus 200 in FIG. 1 of the first embodiment, and the other configurations are the same as those in FIG. In addition, the mobile station in FIG. 5 is accessing the radio base station apparatus 200 instead of the non-decreasing mobile station 102 which is a newly connected mobile station that starts access to the radio base station apparatus 200, and the radio base station apparatus 200 It is assumed that the mobile station 103 that cannot be decreased is an already connected mobile station that approaches the vicinity of. Since the mobile station 103 approaches the vicinity of the radio base station apparatus 200, the propagation loss decreases, the SIR measured by the radio base station apparatus 200 increases, and the mobile station 103 is instructed to reduce the transmission power. If the radio base station apparatus 200 is too close, the transmission power of the mobile station 103 is limited in the variable range, and therefore the transmission power cannot be further reduced. The configuration of each of the mobile stations 101 and 103 is the same as that in FIG. 1 of the first embodiment.

  In the first embodiment, the SIR measurement unit 251 and the SIR determination unit 263 are used as the second transmission power evaluation means for evaluating the transmission power of the non-decreasing mobile station. However, in the third embodiment, the transmission power of the mobile station is A TPC determination unit 264 that is a transmission power control signal history storage unit that stores generation history information of transmission power control signals instructing increase / decrease is used. Further, the TPC determination unit 264 is a first transmission power evaluation unit as in the first embodiment, and constitutes an increase impossibility identification unit. Further, the TPC determination unit 264 and the distance determination unit 262 constitute a non-decreasing identification unit.

  The communication control unit 261 includes a distance determination unit 262 and a TPC determination unit 264. In the communication control unit 261, when the already-connected mobile station 103 and the already-connected mobile station 101 being accessed approaching the vicinity of the radio base station apparatus 200 satisfy a predetermined condition, the communication control unit 261 sends the mobile station 103 to the radio base station apparatus 200. A command for generating an access control signal for restricting access is output to the access control unit 266 as access control means.

  The access control unit 266 that is an access control means generates an access control signal for performing predetermined access control on the mobile station 103 based on a command output from the communication control unit 261. The access control signal output from access control section 266 is output to encoding section 242. Here, it is assumed that the access control signal for performing predetermined access control is a command to prohibit the mobile station 103 from accessing the radio base station apparatus 200 from the mobile station 103, that is, to stop the connection.

Next, the operation will be described.
FIG. 6 is a flowchart for explaining the operation of the CDMA radio base station apparatus according to Embodiment 3 of the present invention.

  The operation for mobile station 101, which is an already connected mobile station that is accessing radio base station apparatus 200, is the same as the operation in the first embodiment.

  Next, an operation for the mobile station 103 that is an already-connected mobile station that is being accessed approaching the vicinity of the radio base station apparatus 200 will be described.

  In step 11, monitoring of the state of an already connected mobile station that is accessing the radio base station apparatus 200 and approaches the vicinity of the radio base station apparatus 200 is started.

  In step 21, it is determined whether or not there is an already connected mobile station for which a power reduction command has been issued continuously for a predetermined number of times. If the mobile station 103 is too close to the radio base station apparatus 200, the transmission power cannot be reduced, and the TPC generation unit 254 continuously generates TPC data that instructs the mobile station 103 to reduce the transmission power. Since the number of continuous generations of TPC data instructing a decrease in transmission power exceeds a predetermined value, the mobile station 103 that cannot decrease the transmission power is identified, and the process proceeds to Step 30. If the number of continuous generations does not reach the predetermined value, the process proceeds to step 61.

  The operations in step 30 and step 40 are the same as the operations in FIG. 2 of the first embodiment.

  In step 51, the radio base station apparatus 200 transmits data for canceling the connection to the mobile station 103 which is an already connected mobile station. The distance determination unit 262 determines that the distance from the mobile station 103 to the reception antenna 201 of the radio base station apparatus 200 is smaller than a predetermined value, and the TPC determination unit 264 instructs the TPC to reduce the transmission power of the mobile station 103. It is detected that data is continuously generated for a predetermined number of times, and TPC determination unit 264 detects that TPC data for instructing an increase in transmission power of mobile station 101 is continuously generated for a predetermined number of times. Then, a command for generating an access control signal for restricting access to the radio base station apparatus 200 to the mobile station 103 is output to the access control unit 266. The access control unit 266 generates an access control signal that is a command to stop the connection to the radio base station apparatus 200 for the mobile station 103 based on the command output from the communication control unit 261. The access control signal generated in the access control unit 266 is transmitted to the mobile station 103 via the encoding unit 242, the spreading unit 234, the DA conversion unit 222, the high frequency transmission unit 212, and the transmission antenna 202.

  In step 61, the mobile station 103 which is an already connected mobile station continues to connect to the radio base station apparatus 200.

  In this way, the radio base station apparatus 200 identifies the non-decreasing mobile station 103 that is an already connected mobile station that is in a position where the distance from the radio base station apparatus 200 is extremely small and cannot reduce the transmission power, and transmits the transmission power. When the non-increasing mobile station 101, which is another already connected mobile station that cannot be increased, is identified, the mobile station 101 that cannot increase the transmission power is damaged by canceling the connection to the radio base station apparatus 200 with respect to the mobile station 103. Can be prevented. Here, as the first transmission power evaluation means for evaluating the transmission power of the non-increasable mobile station 101 and the second transmission power evaluation means for evaluating the transmission power of the non-decreasing mobile station 103, increase / decrease of the transmission power with respect to the mobile station A TPC determination unit 264 that is a transmission power control signal history storage unit that stores generation history information of a transmission power control signal instructing the transmission power control signal is used. Further, the TPC determination unit 264 constitutes an increase impossibility identifying unit. Further, the TPC determination unit 264 and the distance determination unit 262 constitute a non-decreasing identification unit.

  The CDMA radio base station apparatus according to the third embodiment configured as described above receives the first transmission power evaluation means and the second transmission power evaluation means for evaluating the transmission power of the mobile station, and receives from the mobile station. A delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal; a distance from a mobile station to a radio base station device calculated based on the propagation delay time measured by the delay time measuring means; Delay comparison means for comparing with a predetermined distance, non-increase identifying means for identifying non-increasing mobile stations whose transmission power cannot be increased from among the mobile stations based on the first transmission power evaluation means, and transmission power cannot be reduced And a non-decreasing mobile station whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is identified from the mobile stations based on the outputs of the second transmission power evaluation means and the delay comparison means, respectively. When the non-decreasing identifying means and the non-decreasing identifying means identify the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station, the access from the mobile station to the non-decreasing mobile station is controlled. And an access control means for generating an access control signal, so that a non-reducible mobile station that cannot reduce transmission power accesses a radio base station apparatus and prevents a non-increasing mobile station that cannot increase transmission power from being damaged. A wireless base station apparatus of the system can be obtained.

Embodiment 4 FIG.
FIG. 7 is a block diagram illustrating a configuration of a CDMA radio base station apparatus according to Embodiment 4 of the present invention. The configuration of radio base station apparatus 200 in FIG. 7 is obtained by deleting SIR determination unit 263 from radio base station apparatus 200 in FIG. 3 of the second embodiment, and the other configurations are the same as those in FIG. In addition, the mobile station in FIG. 7 is accessing the radio base station apparatus 200 instead of the non-decreasing mobile station 102 which is a newly connected mobile station that starts access to the radio base station apparatus 200, and the radio base station apparatus 200 It is assumed that the mobile station 103 that cannot be decreased is an already connected mobile station that approaches the vicinity of. Since the mobile station 103 approaches the radio base station apparatus 200, the propagation loss decreases, the SIR measured by the radio base station apparatus 200 increases, and the mobile station 103 is instructed to reduce the transmission power. If the radio base station apparatus 200 is too close, the transmission power of the mobile station 103 is limited in the variable range, and therefore the transmission power cannot be further reduced. The configuration of each of the mobile stations 101 and 103 is the same as that in FIG. 3 of the second embodiment.

  In the second embodiment, the SIR measurement unit 251 and the SIR determination unit 263 are used as the second transmission power evaluation unit for evaluating the transmission power of the non-decreasing mobile station 103. In the fourth embodiment, the transmission transmitted by the mobile station is used. An MS power determination unit 265 that is a transmission power information acquisition unit that acquires transmission power information from a desired wave signal obtained by demodulating a radio signal including power information is used. Further, the MS power determining unit 265 constitutes an increase impossibility identifying unit. Further, the MS power determination unit 265 and the distance determination unit 262 constitute a non-decreasing identification unit.

  The communication control unit 261 includes a distance determination unit 262 and an MS power determination unit 265. In the communication control unit 261, when the already-connected mobile station 103 and the already-connected mobile station 101 being accessed approaching the vicinity of the radio base station apparatus 200 satisfy a predetermined condition, the communication control unit 261 sends the mobile station 103 to the radio base station apparatus 200. A command for generating an access control signal for restricting access is output to the access control unit 266 as access control means.

  The access control unit 266 that is an access control means generates an access control signal for performing predetermined access control on the mobile station 103 based on a command output from the communication control unit 261. The access control signal output from access control section 266 is output to encoding section 242. Here, it is assumed that the access control signal for performing predetermined access control is a command to prohibit the mobile station 103 from accessing the radio base station apparatus 200 from the mobile station 103, that is, to stop the connection.

Next, the operation will be described.
FIG. 8 is a flowchart for explaining the operation of the CDMA radio base station apparatus according to Embodiment 4 of the present invention.

  The operation for mobile station 101, which is an already connected mobile station that is accessing radio base station apparatus 200, is the same as the operation in the second embodiment.

  Next, an operation for the mobile station 103 that is an already-connected mobile station that is being accessed approaching the vicinity of the radio base station apparatus 200 will be described.

  The operation in step 11 is the same as that in FIG. 6 of the third embodiment.

  In step 22, it is determined whether or not there is an already connected mobile station that transmits with power lower than a predetermined value. If the mobile station 103 is too close to the radio base station apparatus 200, the transmission power cannot be reduced, that is, the mobile station 103 is transmitting a radio signal with the minimum output power. The transmission power value of the mobile station 103 is identified from the transmission power information of the mobile station 103 acquired in the MS power determination unit 265, and the transmission power value that is the minimum output is below a predetermined value stored in the MS power determination unit 265. . Therefore, the mobile station 103 that cannot reduce the transmission power is identified, and the process proceeds to Step 30. If the transmission power value of the mobile station 103 is not less than the predetermined value stored in the MS power determination unit 265, the process proceeds to step 61.

  The operations in step 30 and step 41 are the same as the operations in FIG. 4 of the second embodiment.

  The operations in step 51 and step 61 are the same as the operations in FIG. 6 of the third embodiment.

  In this way, the radio base station apparatus 200 identifies the non-decreasing mobile station 103 that is an already connected mobile station that is in a position where the distance from the radio base station apparatus 200 is extremely small and cannot reduce the transmission power, and transmits the transmission power. When the non-increasing mobile station 101, which is another already connected mobile station that cannot be increased, is identified, the mobile station 101 that cannot increase the transmission power is damaged by canceling the connection to the radio base station apparatus 200 with respect to the mobile station 103. Can be prevented. Here, transmission power information transmitted by the mobile station as first transmission power evaluation means for evaluating the transmission power of the non-increasing mobile station 101 and second transmission power evaluation means for evaluating the transmission power of the non-decreasing mobile station 103 An MS power determination unit 265 that is a transmission power information acquisition unit that acquires transmission power information from a desired wave signal obtained by demodulating a radio signal including the. Further, the MS power determining unit 265 constitutes an increase impossibility identifying unit. Further, the MS power determination unit 265 and the distance determination unit 262 constitute a non-decreasing identification unit.

  The CDMA radio base station apparatus according to Embodiment 4 configured as described above receives the first transmission power evaluation means and the second transmission power evaluation means for evaluating the transmission power of the mobile station, and receives from the mobile station. A delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal; a distance from a mobile station to a radio base station device calculated based on the propagation delay time measured by the delay time measuring means; Delay comparison means for comparing with a predetermined distance, non-increase identifying means for identifying non-increasing mobile stations whose transmission power cannot be increased from among the mobile stations based on the first transmission power evaluation means, and transmission power cannot be reduced And a non-decreasing mobile station whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is identified from the mobile stations based on the outputs of the second transmission power evaluation means and the delay comparison means, respectively. When the non-decreasing identifying means and the non-decreasing identifying means identify the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station, the access from the mobile station to the non-decreasing mobile station is controlled. And an access control means for generating an access control signal, so that a non-reducible mobile station that cannot reduce transmission power accesses a radio base station apparatus and prevents a non-increasing mobile station that cannot increase transmission power from being damaged. A wireless base station apparatus of the system can be obtained.

  In the description of Embodiment 1 to Embodiment 4 above, the transmission power control signal that stores the generation history information of the transmission power control signal that instructs the mobile station to increase or decrease the transmission power as the first transmission power evaluation means MS power determination that is a TPC determination unit 264 that is a history storage unit or a transmission power information acquisition unit that acquires transmission power information from a desired wave signal obtained by demodulating a radio signal including transmission power information transmitted by a mobile station The SIR measurement unit 251 that measures the SIR, which is the power ratio of the desired wave signal to the interference wave, and the SIR determination unit that determines the magnitude relationship between the SIR measured by the SIR measurement unit and a predetermined value. H.263 may be used. Further, as the first transmission power evaluation unit or the second transmission power evaluation unit, there are three configurations in which the TPC determination unit 264, the MS power determination unit 265, the SIR measurement unit 251 and the SIR determination unit 263 are used as a set. The combination of these configurations is not limited to the combination described in Embodiments 1 to 4, and may be used in any combination.

  Moreover, although the access control signal output from the access control unit 266 of the radio base station apparatus 200 is a command that prohibits the mobile station 102 or 103 from accessing the radio base station apparatus 200, You may comprise so that a control signal may be the instruction | command which changes the transmission frequency of the mobile stations 102 and 103 with respect to the mobile stations 102 and 103. FIG. By changing the transmission frequencies of the mobile stations 102 and 103, it is possible to obtain a CDMA radio base station apparatus that prevents the mobile station 101, which is an already connected mobile station that cannot increase transmission power, from being damaged.

  Further, the distance determination unit 262 calculates the distance from the mobile station to the reception antenna 201 of the radio base station apparatus 200 based on the smallest propagation delay time information calculated by the delay time calculation unit 250, and this calculated distance And the predetermined distance value stored in the distance determination unit 262 are determined. However, the predetermined delay time value is stored in the distance determination unit 262, and the delay time calculation unit 250 calculates the most. The magnitude relationship between the small propagation delay time value and the predetermined propagation delay time value stored in the distance determination unit 262 may be determined. Here, the predetermined delay time is a delay time serving as a reference for determining whether or not the position of the mobile station is in the vicinity of the radio base station apparatus 200.

  Further, the mobile station 101 is arranged near the edge of the service area covered by the radio base station apparatus 200 and receives a large attenuation due to propagation loss, so that the mobile station 101 moves to reach the SIR of the reference value held by the target SIR holding unit 252. The mobile station 101 is instructed to increase the transmission power of the station 101. However, since the mobile station 101 is located closer to the radio base station apparatus 200 and enters the building or the like, the mobile station 101 receives the attenuation of the radio signal. May be instructed to increase the transmission power.

  In the above description of the first to fourth embodiments, the CDMA radio base station apparatus has been described. However, the CDMA radio base station apparatus is not limited to the CDMA radio base station apparatus. The same applies to the access-type radio base station apparatus.

  Further, the non-decreasing identification unit is configured to make the non-decreasing mobile station whose transmission power cannot be reduced and whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance, respectively, the second transmission power evaluation unit and the delay comparison. Although the mobile station is identified based on the output of the means, the mobile station may be identified based only on the output of the second transmission power evaluation means. That is, the non-decreasing identification unit may be configured to identify the non-decreasing mobile station from the mobile stations based on the evaluation of the transmission power of the mobile station output from the transmission power evaluation unit.

  Then, even if the radio base station apparatus instructs the mobile station to increase the transmission power by using the transmission power control means for generating the transmission power control signal for controlling the transmission power of the mobile station and the transmission power control means. Non-increase identification means for identifying a mobile station that cannot increase transmission power from among the mobile stations, and transmission power control means, even if the mobile station is instructed to reduce transmission power, transmission power cannot be reduced The non-decreasing identification means for identifying the mobile station from the mobile stations, and the non-increasing identification means identifying the non-increasing mobile station and the non-decreasing identifying means identifying the non-decreasing mobile station Access control means for generating an access control signal for controlling access to the base station apparatus may be provided.

  Further, when the non-increase identifying means identifies the non-increasable mobile station and the non-decreasing identification means identifies the non-decreasing mobile station, the access control means controls the non-decreasing mobile station to access the radio base station apparatus. Although configured to generate an access control signal, the mobile control station generates an access control signal that controls access to the radio base station device when the mobile station that cannot be reduced is identified without identifying the mobile station that cannot be increased. You may comprise. That is, even if the radio base station apparatus commands transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station and the mobile station using this transmission power control means to reduce the transmission power. A non-reducible identifying means for identifying a non-reducible mobile station from which the transmission power cannot be reduced, and an access control means for generating an access control signal for controlling the non-reducible mobile station to access the radio base station device You may comprise as follows.

  Further, the first transmission power evaluation means or the second transmission power evaluation means is a transmission power control signal history storage unit that stores generation history information of a transmission power control signal that instructs the mobile station to increase or decrease the transmission power. The TPC determination unit 264 identifies whether or not a command for increasing or decreasing the transmission power of the mobile station has been generated continuously a predetermined number of times from the generation history information of the TPC data, and commands an increase in the transmission power. When it is detected that TPC data is continuously generated a predetermined number of times or more, it is determined that the mobile station 101 to be controlled by TPC data cannot increase the transmission power. That is, the transmission power evaluation means stores transmission power control signal history storage means for storing transmission power control signal generation history information that instructs the mobile station to increase or decrease transmission power, and this transmission power control signal history storage means stores the transmission power control signal history storage means. A transmission power control signal for discriminating the magnitude relationship between the predetermined number of times the number of times of continuously instructing only the increase of transmission power in the generation history information or the number of times of continuously instructing only the decrease of transmission power in the generation history information The history discriminating means is provided, but from the generation history information of the TPC data, an average obtained by dividing the difference between the number of times the mobile station transmission power is commanded to increase and the number of times the mobile station transmission power is commanded by the sum of both times The TPC determination unit 264 determines the difference between the number of times the mobile station's transmission power has been commanded and the number of times it has been commanded to decrease. Average value obtained by dividing the sum of, when it is detected that the predetermined value or more, the mobile station 101 to be controlled by the TPC data may be determined that can not be increase the transmission power. That is, the first transmission power evaluation unit or the second transmission power evaluation unit, which is a transmission power evaluation unit, stores transmission power control signal generation history information for instructing the mobile station to increase or decrease the transmission power. The difference between the number of times of instructing an increase in transmission power and the number of times of instructing a decrease in transmission power in the signal history storage means and the generation history information stored in the transmission power control signal history storage means is divided by the sum of the numbers of both. You may comprise so that the transmission power control signal log | history determination means which discriminate | determines the magnitude relationship between an average value and a predetermined value may be provided.

  In addition, as the first transmission power evaluation unit or the second transmission power evaluation unit, an example is shown in which the SIR that is one of the reception qualities of the CDMA radio signal of the mobile station received by the radio base station apparatus is used. . That is, the transmission power evaluation means includes a received signal quality measuring means for measuring the received signal quality from the mobile station, and a received signal for determining the magnitude relationship between the received signal quality measured by the received signal quality measuring means and a predetermined value. It was set as the structure provided with the quality discrimination means. The reception quality is not limited to the SIR, and all parameters for measuring the reception quality of the mobile station can be applied according to the premise of the system to be applied. For example, in a system where thermal noise cannot be ignored, it is appropriate to use SINR (Signal to Interference and Noise Ratio). When it is clear that the signal is used at a spreading factor = 1, it is effective to simply apply SN (Signal to Noise Ratio) or RSSI (Radio Signal Strength Intensity). In a system that can ensure sufficient quality by slow transmission power control, BER (Bit Error Ratio: the ratio of the total number of known signals to the number of errors compared to known signals) or BLER (BLock Error Ratio) : Ratio of the total number of data with CRC with respect to the number of CRC after error correction is OK), or re-encoding error rate (before error correction with respect to the number of bits error-corrected by re-encoding the error-corrected signal) The ratio of the total number of bits) is effective. Furthermore, the parameter used for the transmission power control of the mobile station and the parameter used for the transmission power evaluation means may be different.

  Further, as the first transmission power evaluation means or the second transmission power evaluation means, the transmission power information is acquired from a desired wave signal obtained by demodulating a CDMA radio signal including transmission power information transmitted by the mobile station. Although an example using the MS power determination unit 265 that is a transmission power information acquisition unit has been shown, the present invention is not limited to this, and a transmission power transmission unit that transmits the transmission power information of the mobile station to the radio base station apparatus is not limited to this. In addition, the non-decreasing identification unit may be configured to identify the non-decreasing mobile station from the mobile stations based on the transmission power information of the mobile station transmitted by the transmission power transmitting unit.

  Also, even if the mobile station is instructed to reduce the transmission power by the transmission power control means provided in the radio base station apparatus, the transmission power cannot be reduced when the transmission power cannot be reduced. The information transmission means may be provided, and the transmission power reduction impossible information transmission means may be configured such that the reduction impossible identification means identifies the non-decreasing mobile station from the mobile stations based on the transmission power reduction impossible information of the mobile station transmitted by the transmission means. Good.

  Further, the non-increase identification means identifies the non-increase mobile station, and the non-increase identification means cannot reduce the transmission power, and the distance from the mobile station to the radio base station apparatus cannot be reduced less than a predetermined distance. When the mobile station is identified from among the mobile stations based on the outputs of the second transmission power evaluation means and the delay comparison means, the access control means sends an access control signal for controlling access from the mobile station to the non-decreasing mobile station. Configured to generate. That is, the access control means is configured to selectively generate an access control signal for the mobile station based on the distance between the radio base station apparatus and each mobile station accessing the radio base station apparatus. Here, the distance between the radio base station apparatus and the mobile station is calculated from the delay time measured by the delay time measuring means, but the present invention is not limited to this. For example, the mobile station is provided with a GPS function, and the GPS function is used. The mobile station position information obtained in this way is transmitted to the radio base station apparatus, and the mobile station position information and the radio base station position information transmitted from the mobile station are used to The distance may be calculated.

  In addition, although the example in which the access control signal is a command for prohibiting access from a mobile station communicating with a CDMA wireless base station device is shown, communication is not limited to this, and communication with a wireless base station device of another access method is performed. It may be a command for prohibiting access from a mobile station.

  In addition, although the example in which the access control signal is a command to change the transmission frequency of the mobile station that communicates with the CDMA wireless base station device is shown, the present invention is not limited to this, and communication with other access wireless base station devices is performed. It may be a command to change the transmission frequency of the mobile station.

Embodiment 5. FIG.
In Embodiments 1 to 4, an example in which all the call control units 260 are installed in the radio base station apparatus 200 has been described. However, a radio base station apparatus 200 and this radio base station apparatus 200 provide communication services with mobile stations. A radio base station control device (not shown) for performing a handover process between a service area to be covered and another radio base station covering another adjacent service area is provided, and a call control unit in the radio base station device 200 A part or all of the functions of 260 are configured to be provided in the radio base station controller. Other configurations are the same as those in the first to fourth embodiments.

  The radio base station control device includes a communication restriction determination unit 261, an access control unit 266, and a transmission data generation unit 267, and a target SIR holding unit 252 is mounted on the radio base station device 200. At that time, it is effective to reduce the amount of communication between the radio base station control devices by providing a part of the function of the SIR determination unit 263 to the radio base station device 200. For example, only the determination of the magnitude relationship with a predetermined SIR stored in the SIR determination unit 263 is performed on the radio base station apparatus 200 side, and comprehensive determination including the presence or absence of continuous detection is performed on the radio base station control apparatus side. The same applies to the TPC determination unit 264 and the distance determination unit 262.

  Further, for example, a method of mounting a part of the communication restriction determination unit 261 in the radio base station control device is also effective. Even if there is a command from the radio base station apparatus 200, the presence or absence of a mobile station whose transmission power cannot be raised or a mobile station that cannot be lowered is detected, and the result is transmitted to the radio base station control apparatus.

  For example, a method of dividing the function of the target SIR holding unit 252 is also effective. This is so-called outer loop processing, and a function for correcting the target SIR according to the movement status of the mobile station is mounted on the radio base station control device side, and a function for holding the corrected target SIR is mounted on the radio base station device 200. It is possible to do it.

  Further, the TPC generation unit 254 which is a transmission power control means of the mobile station may be mounted on the radio base station control apparatus. That is, the radio base station apparatus receives, demodulates and decodes a radio signal transmitted from the mobile station, encodes, modulates and transmits a radio signal transmitted to the mobile station, and the radio base station apparatus performs call control and transmission. You may comprise so that electric power control may be performed.

The radio base station control apparatus according to the fifth embodiment configured as described above is a radio base station control apparatus that controls a plurality of radio base station apparatuses, and the mobile station communicates with the radio base station. A transmission power control means for generating a transmission power control signal for controlling the transmission power, and a mobile station that cannot reduce the transmission power even if the mobile power station is instructed to reduce the transmission power by using the transmission power control means. A non-decreasing identification means for identifying from among the stations, and an access control means for generating an access control signal for controlling access to the radio base station apparatus to the non-decreasing mobile station, so that the transmission power cannot be reduced It is possible to obtain a radio base station control device that prevents a non-increasable mobile station that cannot increase the transmission power when the impossible mobile station accesses the radio base station device from being damaged.

  Also, transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station for the mobile station communicating with the radio base station, and increase in transmission power for the mobile station using the transmission power control means The transmission power can be increased even if the mobile station is instructed to decrease the transmission power by using the non-increase identifying means for identifying the non-increasing mobile station from among the mobile stations. When the non-decreasing identification means for identifying the non-decreasing mobile station that cannot be reduced is identified from among the mobile stations, the non-decreasing identifying means identifies the non-increasing mobile station, and the non-decreasing identifying means identifies the non-decreasing mobile station. Access control means for generating an access control signal for controlling the access to the radio base station apparatus to the non-capable mobile station. Increase allowed mobile stations scan and can not increase the transmission power can be obtained wireless base station controller to prevent disturbed.

  In the description of the fifth embodiment, the radio base station apparatus that controls a plurality of CDMA radio base station apparatuses has been described. However, the present invention is not limited to this, and other access schemes that perform transmission power control of a mobile station. The same applies to the radio base station apparatus that controls the plurality of radio base station apparatuses.

Embodiment 6 FIG.
FIG. 9 is a block diagram illustrating the configuration of a mobile station that communicates with a CDMA radio base station apparatus according to Embodiment 6 of the present invention. 9, the mobile station 100 includes a transmission / reception antenna 110, a duplexer 111, a reception unit 120, an access processing unit 130 as an access processing means, a transmission unit 140, a switch 150, a voice output unit 160, a display unit 161, and an input key 162. A voice input unit 163 and a control unit 170. A power supply (not shown) for supplying power to each unit of the mobile station 100 and a data input / output unit (not shown) for inputting / outputting data to / from devices provided outside the mobile station 100 are also provided.

  The transmission / reception antenna 110 receives a radio signal transmitted from the radio base station apparatus 200. A reception signal received by the transmission / reception antenna 110 is output to the reception unit 120 via the duplexer 111. The transmission signal output from the transmission unit 140 is transmitted to the radio base station apparatus 200 via the duplexer 111 and the transmission / reception antenna 110.

  The duplexer 111 includes a directional coupler and a filter, and transmits a predetermined frequency component of a radio signal transmitted from the radio base station apparatus 200 to the reception unit 120 and does not transmit to the transmission unit 140. In addition, a predetermined frequency component of the transmission signal output from the transmission unit 140 is transmitted to the transmission / reception antenna 110 and is not transmitted to the reception unit 120.

  The receiving unit 120 is configured similarly to the high frequency receiving unit 211, the AD converter 221, the path detecting unit 231, the despreading unit 232, the RAKE receiving unit 233, and the decoding unit 241 in the radio base station apparatus 200. In receiving section 120, a radio signal received from radio base station apparatus 200 is converted into a baseband signal. The baseband signal converted by the receiving unit 120 is output to the access processing unit 130 and the audio output unit 160.

  The transmission unit 140 is configured in the same manner as the high-frequency transmission unit 212, the DA converter 222, the spreading unit 234, and the coding unit 242 in the radio base station apparatus 200. The transmitter 140 encodes and spread-modulates a baseband digital audio signal output from an audio input unit 163, which will be described later, or a baseband digital audio signal and mobile station transmission power information (transmission power value). , Analog conversion, and high-frequency modulation processed signals are output to a switch 150 described later.

  Alternatively, the transmission unit 140 is provided with a function for detecting that transmission power cannot be reduced or cannot be increased, and whether or not the transmission unit 140 has continued for a predetermined number of times, or the average value of the predetermined number of times is a predetermined value or more, or Identify the following: At this time, the transmission unit 140 encodes the baseband digital audio signal, the mobile station transmission power information (transmission power value) and the transmission power increase / decrease impossible information output from the audio input unit 163 described later. A transmission signal that has been subjected to the processes of spread modulation, analog conversion, and high frequency modulation is output to a switch 150 described later.

  In the access processing unit 130, an access control signal included in a radio signal received from the radio base station apparatus 200 is input, and access to the radio base station apparatus 200 by the mobile station 100 is controlled based on an instruction of the access control signal. Here, the access control signal is a command for prohibiting the mobile station 100 from accessing the radio base station apparatus 200, and the access processing unit 130 of the mobile station 100 that has received the access control signal transmits to the radio base station apparatus 200. It is assumed that the process of canceling access is performed. In the case of a call when the mobile station 100 starts access to the radio base station apparatus 200, the access control signal is a command for prohibiting the call to the radio base station apparatus 200, and the access processing unit 130 A process of prohibiting a call to the device 200 is performed. In addition, when the mobile station 100 is accessing the radio base station apparatus 200, the access control signal is a command to stop the connection to the radio base station apparatus 200, and the access processing unit 130 connects to the radio base station apparatus 200. Process to cancel. An access processing signal output from the access processing unit 130 is output to the switch 150.

  The switch 150 turns on / off the transmission signal output from the transmission unit 140. By turning off the transmission signal output from the transmission unit 150, transmission to the radio base station apparatus 200 is stopped.

  The audio output unit 160 includes a speaker. An electric signal, which is an audio signal in the baseband signal output from the receiving unit 120, is converted into sound and output.

  The display unit 161 is configured by a liquid crystal display or the like. An image signal in the baseband signal output from the receiving unit 120, information on a control signal from the access processing unit 130 described later, and the like are displayed.

  The input key 162 is an input device that inputs numbers and commands to the mobile station 100 by a key input operation.

  The audio input unit 163 includes a microphone, and the audio signal is converted into a baseband digital electric signal and output to the transmission unit 140.

  The control unit 170 controls each unit of the mobile station 100.

Next, the operation will be described.
A radio signal received from the radio base station 200 is input to the receiving unit 120 as a received signal via the input / output antenna 110 and the duplexer 111. The receiving unit 120 converts the input received signal into a baseband signal. When the access control signal output from the access control unit 266 of the radio base station 200 is included in the baseband signal converted by the receiving unit 120, the access control signal is output to the access processing unit 130. The access control signal is a command for prohibiting the mobile station 100 from accessing the radio base station apparatus 200, and the access processing unit 130 of the mobile station 100 that has received the access control signal causes the access to the radio base station apparatus 200. Perform the process to cancel. That is, by turning off the switch 150, the transmission signal output from the transmission unit 140 is blocked, and the transmission to the radio base station apparatus 200 is stopped. Further, the display unit 161 displays information indicating that the connection to the radio base station apparatus 200 has been canceled based on the access control signal from the radio base station apparatus 200.

  The mobile station that communicates with the CDMA radio base station apparatus according to the sixth embodiment configured as described above is configured such that the non-increase identifying means provided in the radio base station apparatus wirelessly transmits the non-increase mobile station that cannot increase the transmission power. Based on the first transmission power evaluation means for evaluating the transmission power of the mobile station included in the base station apparatus, the mobile station is identified from among the mobile stations, and the non-decreasing identification means included in the radio base station apparatus reduces the transmission power. A second non-decreasing mobile station that cannot be reduced and the distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance, and a second transmission power evaluation unit that evaluates the transmission power of each mobile station provided in the radio base station apparatus; The distance from the mobile station to the radio base station device calculated based on the propagation delay time of the radio signal received from the mobile station measured by the delay time measuring means provided in the radio base station device Access from a non-decreasing mobile station generated by the access control means provided in the radio base station device when it is identified from the mobile stations based on the output of the delay comparison means provided in the radio base station device by comparing with a fixed distance The access processing means is provided for receiving the access control signal for controlling the transmission and performing a predetermined process based on the access control signal, so that the transmission power increases when the non-decreasing mobile station that cannot reduce the transmission power accesses the radio base station apparatus. It is possible to obtain a mobile station that prevents a mobile station that cannot increase from being damaged.

Embodiment 7 FIG.
FIG. 10 is a block diagram illustrating the configuration of a mobile station that communicates with a CDMA radio base station apparatus according to Embodiment 7 of the present invention. In FIG. 10, instead of the switch 150 in FIG. 9, an access processing unit 130 that is an access processing unit controls a local oscillator 143 that forms part of the transmission unit 140. Other configurations are the same as those in FIG.

  In the access processing unit 130, an access control signal included in a radio signal transmitted from the radio base station apparatus 200 is input, and access to the radio base station apparatus 200 by the mobile station 100 is controlled based on an instruction of the access control signal. Here, the access control signal is a command to change the transmission frequency of the mobile station 100, and the access processing unit 130 of the mobile station 100 that has received the access control signal performs a process of changing the oscillation frequency of the local oscillator 143. To do. By changing the oscillation frequency of the local oscillator 143, the transmission frequency of the mobile station 100 is changed.

Next, the operation will be described.
A radio signal received from the radio base station 200 is input to the receiving unit 120 as a received signal via the input / output antenna 110 and the duplexer 111. The receiving unit 120 converts the input received signal into a baseband signal. When the access control signal output from the access control unit 266 of the radio base station 200 is included in the baseband signal converted by the receiving unit 120, the access control signal is output to the access processing unit 130. The access control signal is a command to change the transmission frequency of the mobile station 100, and the access processing unit of the mobile station 100 that has received the access control signal performs a process of changing the oscillation frequency of the local oscillator 143. By changing the oscillation frequency of the local oscillator 143, the transmission frequency of the mobile station 100 is changed. Further, the display unit 161 displays information indicating that the transmission frequency has been changed based on the access control signal from the radio base station apparatus 200.

  In the mobile station that communicates with the CDMA radio base station apparatus according to the seventh embodiment configured as described above, the non-increase identifying means provided in the radio base station apparatus wirelessly transmits the non-increase mobile station that cannot increase the transmission power. Based on the first transmission power evaluation means for evaluating the transmission power of the mobile station included in the base station apparatus, the mobile station is identified from among the mobile stations, and the non-decreasing identification means included in the radio base station apparatus reduces the transmission power. A second non-decreasing mobile station that cannot be reduced and the distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance, and a second transmission power evaluation unit that evaluates the transmission power of each mobile station provided in the radio base station apparatus; The distance from the mobile station to the radio base station device calculated based on the propagation delay time of the radio signal received from the mobile station measured by the delay time measuring means provided in the radio base station device Access from a non-decreasing mobile station generated by the access control means provided in the radio base station device when it is identified from the mobile stations based on the output of the delay comparison means provided in the radio base station device by comparing with a fixed distance The access processing means is provided for receiving the access control signal for controlling the transmission and performing a predetermined process based on the access control signal, so that the transmission power increases when the non-decreasing mobile station that cannot reduce the transmission power accesses the radio base station apparatus. It is possible to obtain a mobile station that prevents a mobile station that cannot increase from being damaged.

  In the description of the sixth embodiment and the seventh embodiment described above, the mobile station that communicates with the CDMA radio base station apparatus has been described. However, the present invention is not limited to this, and other access schemes that perform transmission power control are also described. The same applies to a mobile station that communicates with a radio base station apparatus.

  Further, the non-increase identifying means provided on the radio base station apparatus side identifies the mobile station from among the mobile stations that cannot increase the transmission power, and the non-decrease provided on the radio base station apparatus side. When the identifying means identifies a non-decreasing mobile station whose transmission power cannot be reduced from among the mobile stations, it receives an access control signal that is generated by the access control means provided in the radio base station apparatus and controls access from the non-decreasing mobile station. In addition, an access processing unit that performs predetermined processing based on the access control signal may be provided.

  In addition, when the non-decreasing identification means provided on the radio base station apparatus side identifies the mobile station from among the mobile stations that cannot reduce the transmission power, the access control means provided on the radio base station apparatus side An access processing unit that receives an access control signal that is generated and controls access from a non-decreasing mobile station, and that performs predetermined processing based on the access control signal may be provided.

  In the above description of the first to seventh embodiments, the radio base station apparatus, the radio base station control apparatus, and the mobile station have been described. However, a radio communication system including these may be configured.

  That is, a radio communication system having a radio base station apparatus and a plurality of mobile stations, wherein the radio base station apparatus generates a transmission power control signal for controlling the transmission power of the mobile station for the mobile station A control means, a non-reducible identifying means for identifying a non-reducible mobile station from among the mobile stations that cannot reduce the transmission power even if the mobile station is instructed to reduce the transmission power using this transmission power control means, and a non-reducible identification means You may comprise so that a mobile station may be provided with the access control means which produces | generates the access control signal which controls access to a radio base station apparatus.

  A radio communication system having a radio base station apparatus and a plurality of mobile stations, wherein the radio base station apparatus generates a transmission power control signal for controlling the transmission power of the mobile station for the mobile station Control means, non-increase identifying means for identifying non-increasable mobile stations from which the transmission power cannot be increased even if the transmission power is instructed to the mobile station using the transmission power control means, and transmission power A non-decreasing identification means for identifying a non-decreasing mobile station that cannot reduce transmission power even if the mobile station is instructed to reduce transmission power using the control means, and an increase non-identifying means that cannot increase the mobile station. And an access control means for generating an access control signal for controlling an access to the radio base station apparatus to the non-decreasing mobile station when the non-decreasing identifying unit identifies the non-decreasing mobile station. Sea urchin may be configured.

  A radio communication system comprising a plurality of radio base station apparatuses, a radio base station control apparatus that controls these radio base station apparatuses, and a plurality of mobile stations that communicate with the radio base station apparatus, The station control device generates a transmission power control signal for generating a transmission power control signal for controlling the transmission power of the mobile station to the mobile station, and instructs the mobile station to reduce the transmission power using the transmission power control means. A non-reducible identifying means for identifying a non-reducible mobile station that cannot reduce transmission power from among mobile stations, and an access control means for generating an access control signal for controlling the non-reducible mobile station to access a radio base station device; You may comprise so that.

  Furthermore, a radio communication system comprising a plurality of radio base station devices, a radio base station control device that controls these radio base station devices, and a plurality of mobile stations that communicate with the radio base station device, The station control device generates a transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station to the mobile station, and instructs the mobile station to increase the transmission power using the transmission power control means. The transmission power cannot be reduced even if the mobile station is instructed to reduce the transmission power by using the non-increase identification means for identifying the non-increasable mobile station from which the transmission power cannot be increased, and the transmission power control means. When the non-decreasing mobile station is identified from among the mobile stations, the non-decreasing identifying unit identifies the non-increasing mobile station, and the non-decreasing identifying unit identifies the non-decreasing mobile station. And access control means for generating an access control signal that controls access to the radio base station apparatus may be configured to include a.

It is a block diagram explaining the structure of the radio base station apparatus of the CDMA system in Embodiment 1 of this invention. 5 is a flowchart for explaining the operation of a CDMA radio base station apparatus according to Embodiment 1 of the present invention. It is a block diagram explaining the structure of the radio base station apparatus of the CDMA system in Embodiment 2 of this invention. It is a flowchart explaining the operation | movement of the radio base station apparatus of the CDMA system in Embodiment 2 of this invention. It is a block diagram explaining the structure of the radio base station apparatus of the CDMA system in Embodiment 3 of this invention. It is a flowchart explaining the operation | movement of the radio base station apparatus of the CDMA system in Embodiment 3 of this invention. It is a block diagram explaining the structure of the radio base station apparatus of the CDMA system in Embodiment 4 of this invention. It is a flowchart explaining the operation | movement of the radio base station apparatus of the CDMA system in Embodiment 4 of this invention. It is a block diagram explaining the structure of the mobile station which communicates with the radio base station apparatus of the CDMA system in Embodiment 6 of this invention. It is a block diagram explaining the structure of the mobile station which communicates with the radio base station apparatus of the CDMA system in Embodiment 7 of this invention.

Explanation of symbols

100 mobile station 101 non-increase mobile station 102 non-decreasing mobile station 103 which is a newly connected mobile station 103 non-decreasing mobile station which is an already connected mobile station 110 transmitting / receiving antenna 111 duplexer 120 receiving unit 130 access processing unit 140 which is an access processing means Unit 141 spreading unit 142 modulation unit 143 local oscillator 150 switch 160 voice output unit 161 display unit 162 input key 163 voice input unit 170 control unit 200 CDMA radio base station apparatus 201 reception antenna 202 transmission antenna 210 high frequency unit 211 high frequency reception unit 212 High-frequency transmission unit 221 AD converter 222 DA converter 231 Path detection unit 232 Despreading unit 233 RAKE receiving unit 234 Spreading unit 241 Decoding unit 242 Encoding unit 250 Delay time calculating unit 251 SIR measuring unit 252 Target delay time measuring means S R holding unit 253 SIR comparison unit 254 TPC generation unit 260 as transmission power control means of mobile station Call control unit 261 Communication restriction determination unit 262 Distance determination unit 263 as delay comparison means SIR determination unit 264 Transmission power control signal history storage unit TPC determination unit 265 MS power determination unit 266 Access control unit 267 as access control means Transmission data generation unit

Claims (29)

A wireless base station device that communicates with a plurality of mobile stations,
Transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station;
Non-decreasing identification means for identifying non-decreasing mobile stations from which the transmission power cannot be reduced even if the mobile station is instructed to reduce transmission power using the transmission power control means;
Access control means for generating an access control signal for controlling access to the radio base station apparatus to the non-decreasing mobile station;
A radio base station apparatus comprising: Comprising non-increasing identifying means for identifying non-increasing mobile stations that cannot increase transmission power even if the mobile station is instructed to increase transmission power using transmission power control means;
When the non-increase identification means identifies the non-increase mobile station, and the non-decrease identification means identifies the non-decrease mobile station, the access control means controls the non-decrease mobile station to access the radio base station apparatus. Generate an access control signal,
The radio base station apparatus according to claim 1. A transmission power evaluation means for evaluating the transmission power of the mobile station;
A non-decreasing identification unit identifies a non-decreasing mobile station from the mobile stations based on an evaluation of the transmission power of the mobile station output from the transmission power evaluation unit.
The radio base station apparatus according to claim 1 or 2. Transmit power evaluation means
Transmission power control signal history storage means for storing generation history information of a transmission power control signal instructing the mobile station to increase or decrease transmission power;
An average value obtained by dividing the difference between the number of times of instructing an increase in transmission power and the number of times of instructing a decrease in transmission power in the generation history information stored in the transmission power control signal history storage unit by the sum of the number of both, and a predetermined value Transmission power control signal history determination means for determining the magnitude relationship with the value of
The radio base station apparatus according to claim 3, comprising: Transmit power evaluation means
Transmission power control signal history storage means for storing generation history information of a transmission power control signal instructing the mobile station to increase or decrease transmission power;
The number of times of continuously instructing only an increase in transmission power in the generation history information stored by the transmission power control signal history storage means, or the number of times of instructing only a decrease in transmission power in the generation history information. A transmission power control signal history discriminating means for discriminating a magnitude relationship with a value;
The radio base station apparatus according to claim 3, comprising: Transmit power evaluation means
Received signal quality measuring means for measuring received signal quality from the mobile station;
Received signal quality determining means for determining a magnitude relationship between the received signal quality measured by the received signal quality measuring means and a predetermined value;
The radio base station apparatus according to claim 3, comprising: The received signal quality is at least
SIR, which is the power ratio of the desired signal to the interference wave,
SINR, which is the power ratio of the desired signal to the sum of interference and noise,
SN, which is the power ratio of the desired signal to noise
RSSI, which is the electric field strength of the received signal,
BER, which is an error rate of a known signal included in the desired signal
BLER which is an error rate of a known block signal included in the desired signal, or a re-encoding error rate,
The radio base station apparatus according to claim 6, wherein The mobile station comprises transmission power transmission means for transmitting the transmission power information of the mobile station to the radio base station device,
The non-decreasing identification means identifies the non-decreasing mobile station from the mobile stations based on the transmission power information of the mobile station transmitted by the transmission power transmitting means.
The radio base station apparatus according to claim 1 or 2. Transmission power reduction impossibility information for transmitting transmission power reduction impossibility information to the radio base station apparatus when transmission power cannot be reduced even if the mobile station is instructed to reduce transmission power by transmission power control means provided in the radio base station apparatus A transmission means,
The non-decreasing identification means identifies the non-decreasing mobile station from the mobile stations based on the transmission power decrement non-information of the mobile station transmitted by the transmission power decrementing non-information transmitting means
The radio base station apparatus according to claim 1 or 2. The access control means selectively generates an access control signal for the mobile station based on the distance between the radio base station device and each mobile station accessing the radio base station device.
The radio base station apparatus according to any one of claims 1 to 9. The radio base station apparatus according to any one of claims 1 to 10, wherein the access control signal is a command for prohibiting access from a mobile station. The radio base station apparatus according to any one of claims 1 to 10, wherein the access control signal is a command to change a transmission frequency of the mobile station. A CDMA radio base station apparatus,
First transmission power evaluation means and second transmission power evaluation means for evaluating the transmission power of the mobile station;
Delay time measuring means for measuring a propagation delay time of a desired wave signal obtained by demodulating a radio signal received from the mobile station;
A delay comparing means for comparing a distance from the mobile station to the radio base station device calculated based on the propagation delay time measured by the delay time measuring means and a predetermined distance;
Non-increasing identification means for identifying non-increasing mobile stations that cannot increase transmission power from among the mobile stations based on the first transmission power evaluation means;
A non-decreasing mobile station whose transmission power cannot be reduced and whose distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance is output to each of the second transmission power evaluation means and the delay comparison means. Non-decreasing identification means for identifying from among the mobile stations based on,
Access control for controlling access from the mobile station to the non-decreasing mobile station when the non-increase identifying unit identifies the non-increasable mobile station and the non-decreasing identification unit identifies the non-decreasing mobile station Access control means for generating a signal;
A CDMA radio base station apparatus comprising: The first transmission power evaluation means or the second transmission power evaluation means is
An SIR measurement unit for measuring SIR which is a power ratio of a desired wave signal to an interference wave;
An SIR determination unit for determining a magnitude relationship between the SIR measured by the SIR measurement unit and a predetermined value;
The CDMA radio base station apparatus according to claim 13, comprising: The first transmission power evaluation means or the second transmission power evaluation means is
A transmission power control signal history storage unit that stores generation history information of a transmission power control signal that instructs the mobile station to increase or decrease transmission power; and
The CDMA radio base station apparatus according to claim 13, comprising: The first transmission power evaluation means or the second transmission power evaluation means is
A transmission power information acquisition unit for acquiring the transmission power information from a desired wave signal obtained by demodulating a radio signal including transmission power information transmitted by a mobile station;
The CDMA radio base station apparatus according to claim 13, comprising: The CDMA radio base station apparatus according to claim 13, wherein the access control signal is a command for prohibiting access from a mobile station. The CDMA radio base station apparatus according to any one of claims 13 to 16, wherein the access control signal is a command to change a transmission frequency of the mobile station. A radio base station control device that controls a plurality of radio base station devices,
A transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station for the mobile station communicating with the radio base station;
Non-decreasing identification means for identifying non-decreasing mobile stations from which the transmission power cannot be reduced even if the mobile station is instructed to reduce transmission power using the transmission power control means;
Access control means for generating an access control signal for controlling access to the radio base station apparatus to the non-decreasing mobile station;
A radio base station control device. Comprising non-increasing identifying means for identifying non-increasing mobile stations that cannot increase transmission power even if the mobile station is instructed to increase transmission power using transmission power control means;
When the non-increase identification means identifies the non-increase mobile station, and the non-decrease identification means identifies the non-decrease mobile station, the access control means controls the non-decrease mobile station to access the radio base station apparatus. Generate an access control signal,
The radio base station control device according to claim 19. A mobile station that communicates with a radio base station device,
When the non-decreasing identification means provided on the radio base station apparatus side identifies the non-decreasing mobile station from which the transmission power cannot be reduced, among the mobile stations, it is generated by the access control means provided on the radio base station apparatus side. A mobile station comprising an access processing means for receiving an access control signal for controlling access from a non-decreasing mobile station and performing a predetermined process based on the access control signal. A non-increasing identification means for identifying non-increasing mobile stations that cannot increase transmission power on the radio base station side from among mobile stations,
The non-increasing identification unit identifies the non-increasing mobile station from the mobile stations, and the non-decreasing identifying unit provided on the radio base station apparatus side moves the non-decreasing mobile station that cannot reduce transmission power. When it is identified from among the stations, it receives an access control signal for controlling access from the non-decreasing mobile station generated by the access control means provided in the radio base station apparatus, and performs predetermined processing based on the access control signal The mobile station according to claim 21, further comprising access processing means. A mobile station that communicates with a CDMA wireless base station device,
Based on the first transmission power evaluating means for evaluating the transmission power of the mobile station provided in the radio base station apparatus for the non-increasable mobile station in which the transmission power cannot be increased. The non-decreasing identification means for identifying from among the mobile stations and provided in the radio base station apparatus cannot reduce transmission power, and the distance from the mobile station to the radio base station apparatus is smaller than a predetermined distance The non-decreasing mobile station is measured by second transmission power evaluation means for evaluating the transmission power of the mobile station provided in the radio base station apparatus, and by the delay time measurement means provided in the radio base station apparatus. A distance from the mobile station to the radio base station device calculated based on a propagation delay time of a radio signal received from the station is compared with a predetermined distance to compare the radio base station device And receiving an access control signal for controlling access from the non-decreasing mobile station generated by the access control means provided in the radio base station device. And a mobile station comprising access processing means for performing predetermined processing based on the access control signal. The access control signal is a command for prohibiting access to a CDMA radio base station apparatus, and the access processing means performs a process of stopping access to the CDMA radio base station apparatus. The mobile station described in 1. The mobile station according to any one of claims 21 to 23, wherein the access control signal is a command to change the transmission frequency of the mobile station, and the access processing means performs a process of changing the transmission frequency. A wireless communication system having a wireless base station device and a plurality of mobile stations,
The radio base station device
Transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station to the mobile station;
Non-decreasing identification means for identifying non-decreasing mobile stations from which the transmission power cannot be reduced even if the mobile station is instructed to reduce transmission power using the transmission power control means;
Access control means for generating an access control signal for controlling access to the radio base station apparatus to the non-decreasing mobile station;
A wireless communication system. The radio base station apparatus has an increase incapability identifying means for identifying an unincreasable mobile station from which the transmission power cannot be increased even if the mobile power station is instructed to increase the transmission power using the transmission power control means. ,
When the non-increase identification means identifies the non-increase mobile station, and the non-decrease identification means identifies the non-decrease mobile station, the access control means controls the non-decrease mobile station to access the radio base station apparatus. Generate an access control signal,
27. A wireless communication system according to claim 26. A radio communication system having a plurality of radio base station devices, a radio base station control device that controls these radio base station devices, and a plurality of mobile stations that communicate with the radio base station device,
The radio base station controller is
Transmission power control means for generating a transmission power control signal for controlling the transmission power of the mobile station to the mobile station;
Non-decreasing identification means for identifying non-decreasing mobile stations from which the transmission power cannot be reduced even if the mobile station is instructed to reduce transmission power using the transmission power control means;
Access control means for generating an access control signal for controlling access to the radio base station apparatus to the non-decreasing mobile station;
A wireless communication system. A non-increase identifying means for identifying an unincreasable mobile station from which the transmission power cannot be increased even if the radio base station controller uses the transmission power control means to instruct the mobile station to increase the transmission power. Prepared,
When the non-increase identification means identifies the non-increase mobile station, and the non-decrease identification means identifies the non-decrease mobile station, the access control means controls the non-decrease mobile station to access the radio base station apparatus. Generate an access control signal,
The wireless communication system according to claim 28.

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