JP2005039651A - Radio communication system, base station device and personal digital assistant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the throughput of the system as a whole, to provide a personal digital assistant that corresponds to a user's object and to reduce the transmission power of a base station. <P>SOLUTION: A baseband determining part 207 determines a modulation method, an error correcting method, etc., being processing contents in a transmission baseband part 209 on the basis of communication quality information and basic performance information. For example, when communication quality is excellent, the modulation method is determined to be a modulation method shown by basic performance. A scheduling part 208 assigns scheduling on the basis of the communication quality information, QoS information and the basic performance information. For example, more scheduling is assigned to a personal digital assistant(PDA) excellent in basic performance. Also, a power determining part 210 determines the transmission power of a signal to be transmitted to a PDA on the basis of the communication quality information and the basic performance information. For example, the power determining part 210 determines to transmit the signal to the PDA excellent in basic performance with little transmission power. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wireless communication system in which a portable information terminal device and a base station device perform wireless communication, and is useful for, for example, time scheduling assignment.

Conventionally, in radio communication between a base station and a portable information terminal, since radio resources are limited, the base station uses each portable information terminal based on the communication quality, QoS (Quality of Service), etc. between the portable information terminal and the base station. By assigning time scheduling to the information terminal, the wireless communication line is efficiently operated (see, for example, Patent Document 1 or Patent Document 2). Furthermore, it is considered that transmission power required for wireless communication between a base station and a portable information terminal can be efficiently controlled based on communication quality (see, for example, Patent Document 3).
JP 2001-333097 A Japanese Patent Laid-Open No. 2002-78012 JP 2002-101043 A

  However, in the above-described conventional wireless communication system, when a portable information terminal having excellent basic performance such as reception sensitivity characteristics, A / D conversion resolution, and modulation method of the portable information terminal and a portable information terminal having inferior basic performance are realized. That is, when a portable information terminal having a performance difference in basic performance is realized, a conventional wireless communication system assigns scheduling based on communication quality and QoS, and a portable information terminal with excellent basic performance A mobile information terminal with inferior basic performance is similarly assigned scheduling, and the throughput of a mobile information terminal with excellent basic performance is good, but the throughput of a mobile information terminal with inferior basic performance is poor, so the overall system throughput is low. descend.

  Further, in the conventional wireless communication system, since the modulation scheme is determined based on the communication quality and QoS, the same modulation scheme is assigned to these portable information terminals, and the portable information terminals having excellent basic performance are assigned. More efficient wireless communication cannot be performed, and the throughput of the entire system is reduced. For this reason, there are few advantages of realizing portable information terminals with different basic performance, and no portable information terminals with different basic performance have been realized. Therefore, cost reduction and power consumption reduction due to differences in components mounted on portable information terminals. As a result, there is a problem that a portable information terminal according to the user's purpose cannot be provided. For example, if the basic performance of a portable information terminal is the minimum basic performance for wireless communication, a portable information terminal that can be used at low cost for a long time can be provided. Cannot be provided.

  Furthermore, in the conventional wireless communication system, the transmission power of wireless communication between the base station and the portable information terminal is controlled by the communication quality, but the portable information terminal with excellent basic performance and the portable information with inferior basic performance. Since the terminal performs wireless communication with transmission power determined by the same control, the base station wirelessly communicates with a portable information terminal having excellent basic performance with more power than necessary, and the base station wastes transmission power. There is a problem of end up.

  The present invention has been made in view of the above points, and has as its object to improve the throughput of the entire system, to provide a portable information terminal device according to the user's purpose, and to reduce the transmission power of the base station.

  In order to solve this problem, a wireless communication system according to the present invention is a wireless communication system in which a base station device and a portable information terminal device perform wireless communication, and the portable information terminal device detects the basic performance of the device itself. Means and a notification means for notifying the base station device of the basic performance detected by the detection means, the base station device based on the basic performance notified from the portable information terminal device, A configuration including communication processing means for performing communication processing on a signal transmitted to the portable information terminal device is adopted.

  According to this configuration, the wireless performance such as the reception sensitivity of the portable information terminal device and the resolution of A / D conversion, the modulation method that can be supported by the portable information terminal device, the error correction method, the presence / absence of the canceller, the soft decision bit It is possible to provide a portable information terminal device having a performance difference in basic performance by performing communication processing on a signal transmitted from the base station device to the portable information terminal device based on basic performance such as baseband performance such as number. In addition, it is possible to efficiently perform data transmission with a portable information terminal device having excellent basic performance, and to improve the throughput of the entire system. Furthermore, since the portable information terminal device with excellent basic performance can receive a signal transmitted with weak transmission power, the transmission power of the base station device can be reduced.

  The base station apparatus of the present invention receives from the portable information terminal apparatus that is a communication partner, information indicating the basic performance of the portable information terminal apparatus, and transmits the information to the portable information terminal apparatus based on the basic performance information And a communication processing means for performing communication processing of signals to be performed.

  According to this configuration, the wireless performance such as the reception sensitivity of the portable information terminal device and the resolution of A / D conversion, the modulation method that can be supported by the portable information terminal device, the error correction method, the presence / absence of the canceller, the soft decision bit Based on basic performance such as baseband performance such as number, the base station device performs data transmission to the portable information terminal device having excellent basic performance by performing communication processing on the signal transmitted to the portable information terminal device. And the throughput of the entire system can be improved. Furthermore, since the portable information terminal device with excellent basic performance can receive a signal transmitted with weak transmission power, the transmission power of the base station device can be reduced.

  The base station apparatus of the present invention, in the above configuration, the communication processing means, based on the basic performance information, scheduling means for determining a time schedule of a data packet to be transmitted to the portable information terminal device, And a baseband unit that performs baseband processing of a signal to be transmitted to the portable information terminal device in accordance with a time schedule determined by the scheduling unit.

  According to this configuration, the base station apparatus determines the time schedule of the data packet to be transmitted to the portable information terminal apparatus based on the basic performance information of the portable information terminal apparatus. A lot of scheduling can be assigned to the apparatus, a lot of data can be transmitted efficiently, and the throughput of the entire system can be improved.

  In the base station apparatus according to the present invention, in the above configuration, the communication processing unit is configured to select at least one baseband from a modulation scheme, an error correction scheme, the presence / absence of a canceller, and the number of bits in soft decision based on the basic performance information. Baseband determining means for determining processing contents; and baseband means for performing baseband processing of a signal to be transmitted to the portable information terminal device in accordance with the baseband processing contents determined by the baseband determining means. Take the configuration.

  According to this configuration, the base station apparatus determines at least one baseband processing content among the modulation scheme, error correction scheme, presence / absence of a canceller, and the number of bits in soft decision based on basic performance information of the portable information terminal device By doing so, for example, a portable information terminal device with excellent basic performance can use a modulation scheme with a high modulation multi-level number, so that the data transmission rate can be improved and the throughput of the entire system can be improved. it can.

  The base station apparatus of the present invention employs a configuration in which, in the above configuration, the communication processing unit includes a power control unit that controls transmission power of a signal transmitted to the portable information terminal device based on the basic performance information. .

  According to this configuration, by controlling the transmission power of the signal transmitted from the base station device to the portable information terminal device based on the basic performance information of the portable information terminal device, for example, Since even a signal transmitted with weak transmission power can be received, the transmission power of the base station apparatus can be reduced.

  The portable information terminal device of the present invention comprises a detection means for detecting the basic performance of the device itself, and a notification means for notifying the base station device that is the communication counterpart of the basic performance detected by the detection means. take.

  According to this configuration, it is possible to provide a performance difference in the basic performance of the portable information terminal device by notifying the base station device that performs communication processing based on the basic performance of the portable information terminal device of the basic performance of the own device. Since it can do, the portable information terminal device according to the user's purpose can be provided.

  The portable information terminal device according to the present invention employs a configuration in which, in the above configuration, the detection unit includes a storage unit that stores information indicating the wireless performance of the own device, and detects the information stored in the storage unit.

  According to this configuration, it is possible to reduce the time required for detecting the wireless performance by detecting the information indicating the wireless performance of the own device stored in the storage unit.

  The portable information terminal device of the present invention employs a configuration in which, in the above configuration, the detection means detects the current wireless performance.

  According to this configuration, since the wireless performance at the time of manufacture changes with use, the mobile information terminal device detects the current wireless performance and notifies the base station device of the detected wireless performance, The station apparatus can perform communication processing based on accurate wireless performance.

  The portable information terminal device according to the present invention employs a configuration in which, in the above configuration, the detection means detects the baseband performance of the device itself.

  According to this configuration, the detection means detects the baseband performance such as a modulation method, an error correction method, the presence / absence of a canceller, and the number of soft decision bits that can be supported by the portable information terminal device, and the detected baseband performance is By performing communication processing based on the baseband performance notified to the base station device and notified to the base station device, efficient data transmission can be performed to a portable information terminal device having excellent baseband performance. The overall throughput can be improved.

  As described above, according to the present invention, the throughput of the entire system can be improved and the base station power consumption can be reduced by performing communication processing according to the basic performance of each portable information terminal. In addition, since it is possible to avoid a decrease in the throughput of the entire system even if a performance difference is provided in the portable information terminal, it is possible to provide a portable information terminal that meets the user's request such as power saving and cost reduction. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(One embodiment)
FIG. 1 is a block diagram showing a configuration of a portable information terminal according to an embodiment of the present invention. In this figure, the input unit 101 receives information necessary for selecting QoS by the user of the portable information terminal, and QoS is selected based on the input information. The selected QoS information is output to the QoS storage unit 102.

  The QoS storage unit 102 stores the QoS information of the portable information terminal output from the input unit 101, and outputs the stored QoS information to the baseband unit 103.

  Based on the information output from the QoS storage unit 102 and the basic performance storage unit 106, the baseband unit 103 performs baseband processing such as modulation and error correction coding on data to be transmitted to the base station. Is output to the communication unit 104.

  The communication unit 104 performs radio processing such as D / A conversion, up-conversion, and power amplification on the signal output from the baseband unit 103, and transmits the radio-processed signal to the base station. Note that the baseband unit 103 and the communication unit 104 function as a notification unit.

  The basic performance detection unit 105 detects the baseband performance of the baseband unit 103 and the wireless performance of the communication unit 104, and outputs information indicating the detected basic performance to the basic performance storage unit 106. Details of baseband performance and radio performance will be described later.

  The basic performance storage unit 106 stores the basic performance information output from the basic performance detection unit 105, and outputs the stored information to the baseband unit 103. Thereby, basic performance information is transmitted to the base station. The basic performance detection unit 105 and the basic performance storage unit 106 function as detection means.

  FIG. 2 is a block diagram showing the configuration of the base station according to one embodiment of the present invention. In this figure, a receiving communication unit 201 receives a signal transmitted from a portable information terminal, performs wireless reception processing such as down-conversion and A / D conversion on the received signal, and receives a signal after wireless reception processing. Output to the baseband unit 202.

  The reception baseband unit 202 performs reception baseband processing such as data demodulation and decoding on the signal output from the reception communication unit 201, and the received baseband processing signal is transmitted to the communication quality estimation unit 203 and the QoS storage unit 205. And output to the basic performance storage unit 206. The receiving communication unit 201 and the receiving baseband unit 202 function as receiving means.

  Communication quality estimation section 203 estimates communication quality based on the signal output from reception baseband section 202. Specifically, the communication quality including the received power, noise, and interference power of the signal received by the base station is estimated. Information indicating the estimated communication quality is output to and stored in the communication quality storage unit 204.

  The QoS storage unit 205 stores information indicating the QoS of the portable information terminal among the signals output from the reception baseband unit 202.

  The basic performance storage unit 206 stores information indicating the basic performance of the portable information terminal among the signals output from the reception baseband unit 202.

  The baseband determination unit 207 reads the communication quality information stored in the communication quality storage unit 204 and the basic performance information stored in the basic performance storage unit 206, and transmits to the portable information terminal based on the read information. Baseband processing contents such as a signal modulation method and error correction method are determined. The determined baseband information is output to the transmission baseband unit 209.

  The scheduling unit 208 reads and reads out the communication quality information stored in the communication quality storage unit 204, the QoS information stored in the QoS storage unit 205, and the basic performance information stored in the basic performance storage unit 206, respectively. Based on the received information, scheduling is performed to determine the order in which radio resources are allocated to the portable information terminal, the frequency of allocation, the amount of allocated radio resources, and the like. The scheduling information is output to the transmission baseband unit 209.

  A transmission baseband unit 209 serving as a baseband unit encodes data to be transmitted to the portable information terminal based on the baseband information output from the baseband determination unit 207 and the scheduling information output from the scheduling unit 208. Then, transmission baseband processing such as modulation is performed, and a signal subjected to transmission baseband processing is output to the transmission communication unit 212.

  The power determination unit 210 reads the communication quality information stored in the communication quality storage unit 204 and the basic performance information stored in the basic performance storage unit 206, and transmits a signal to the portable information terminal based on the read information Determine the transmission power. The determined transmission power information is output to the power control unit 211.

  The power control unit 211 controls the power amplifier of the transmission communication unit 212 based on the transmission power information output from the power determination unit 210. The power determination unit 210 and the power control unit 211 function as a power control unit.

  The transmission communication unit 212 upconverts the baseband signal output from the transmission baseband unit 209 to a radio frequency signal, amplifies the transmission power of the upconverted signal according to the control of the power control unit 211, and is amplified. The received signal is transmitted to the portable information terminal. The baseband determination unit 207, scheduling unit 208, transmission baseband unit 209, power determination unit 210, power control unit 211, and transmission communication unit 212 function as communication processing means. However, the communication processing unit may be at least one of the baseband determination unit 207, the scheduling unit 208, and the power control unit (the power determination unit 210 and the power control unit 211).

  Here, the basic performance of the portable information terminal will be described. The basic performance of the portable information terminal is the wireless performance of the communication unit that performs wireless communication with the base station and the baseband performance of the baseband unit.

  Specifically, the wireless performance is reception sensitivity and A / D conversion resolution, and depends on the quality of components mounted on the communication unit of the portable information terminal. For example, a communication unit with good reception sensitivity and high A / D conversion resolution can be said to have high wireless performance. Baseband performance includes modulation schemes (for example, BPSK (Binary Phase Shift Keying), QPSK (Quadrature PSK), 8PSK, 16QAM (16 Quadrature Amplitude Modulation), 64QAM, etc.) and error correction schemes (for example, turbo code, BCH, etc.). (Base-Chaudhuri-Hocquenghem) code, RS (Reed-Solomon) code, etc.), presence / absence of canceller, and the number of bits for soft decision. For example, if the modulation method supports up to 64QAM, the error correction code corresponds to the turbo code, the canceller is provided, and the number of soft decision bits is large, it can be said that the baseband performance is high.

  FIG. 3 is a diagram showing the basic performance of the portable information terminal according to the embodiment of the present invention. Here, a case will be described in which three terminals of portable information terminals A, B, and C having different basic performances perform wireless communication with a base station. As described above, the basic performance is classified into wireless performance and baseband performance. The wireless performance is expressed by reception sensitivity and the number of bits after A / D conversion (number of A / D conversion bits). Hereinafter, the basic performance of a conventional portable information terminal will be described as a reference (reference value). The number of bits after A / D conversion is equal to the number of bits before D / A conversion.

  The reception sensitivity is represented by 0 if it is equal to the reference value, and is represented by a larger number as the reception sensitivity is superior to the reference value, and is represented by a smaller number as the reception sensitivity is inferior to the reference value. Further, the number of A / D conversion bits is represented by 0 if it is equal to the reference value, and if it is greater than the reference value, the greater part is represented by a numerical value, and if it is less than the reference value, the smaller part is represented by a numerical value.

  The baseband performance is represented by a modulation scheme, an error correction scheme, the presence / absence of a canceller, and the number of soft decision bits. The modulation scheme indicates a type such as 64QAM, 16QAM, 8PSK, QPSK, or BPSK. When the modulation scheme is 64QAM, it corresponds to the modulation schemes of 64QAM, 16QAM, 8PSK, QPSK, and BPSK. In the case of QPSK, it corresponds to QPSK and BPSK, and does not correspond to 64QAM, 16QAM, and 8PSK.

  The error correction method indicates the type of error correction code such as turbo code or RS code. The canceller indicates the presence or absence (or type) of the canceller. The soft decision bit number is represented by 0 if it is equal to the reference value, and the other bits are represented by a difference value of the soft decision bit number with respect to the reference value.

  The table of FIG. 3 shows the basic performance of each portable information terminal A, B, C. The portable information terminal A is a portable information terminal that has much higher performance than the standard and excellent basic performance. In addition, the portable information terminal B is a portable information terminal (corresponding to a conventional portable information terminal) having a performance substantially equivalent to the standard, and the portable information terminal C is a portable information terminal having a performance inferior to the standard. By providing a performance difference in the basic performance of each portable information terminal, it is possible to provide a portable information terminal according to the user's purpose, such as reducing the cost of the portable information terminal or realizing power saving. wear.

  Next, the operation of the base station having the above configuration will be described. Hereinafter, the conditions of FIG. 3 will be described as an example. Note that the communication quality of the portable information terminals A, B, and C is very good and equivalent.

  As shown in FIG. 3, the basic performance storage unit 206 stores the basic performance information transmitted from the portable information terminal in association with each portable information terminal.

  In the baseband determination unit 207, based on the communication quality information acquired from the communication quality storage unit 204 and the modulation method, error correction method, and soft decision bit number included in the basic performance information acquired from the basic performance storage unit 206, Processing contents in the transmission baseband unit 209 such as a modulation method and an error correction method of a signal transmitted to the portable information terminal are determined. As for the modulation scheme, for example, when the communication quality is good, the modulation scheme determines a modulation multi-level number as large as possible. That is, the modulation scheme indicated by the basic performance is determined. Specifically, the mobile information terminal A is 64QAM, the mobile information terminal B is 16QAM, and the mobile information terminal C is QPSK.

  Further, the error correction method is determined to be an error correction code of basic performance, and the number of soft decision bits is determined to be an addition value (number of bits) between the reference bit number and the soft decision bit number shown in FIG. . Therefore, at this time, the contents of the baseband processing performed by the base station are as shown in FIG. The content of the determined baseband processing is notified to the transmission baseband unit 209.

  The scheduling unit 208 performs scheduling for data to be transmitted to the portable information terminal. In the following, specific scheduling will be described with reference to FIG. 5 separately for cases where basic performance is not considered and cases where basic performance is not considered. FIG. 5 is a diagram for explaining how scheduling is allocated in one embodiment of the present invention. Here, the QoS is assumed to be equally high for the portable information terminal A and the portable information terminal B, and low for the portable information terminal C. In FIG. 5, reference numerals 1 to 18 denote scheduling templates, and each template determines the order in which data packets per unit time are transmitted between the base station and the portable information terminals A, B, and C.

  FIG. 5A shows a case where basic performance is not considered in scheduling. The scheduling unit 208 assigns more scheduling to the terminals A and B because the communication qualities of the portable information terminals A, B, and C are equal and the QoS is higher for the terminals A and B than the terminal C. For this reason, the ratio of the number of data packets transmitted per unit time is A: B: C = 7: 7: 4 as shown in FIG.

  On the other hand, FIG. 5B shows a case where basic performance is considered in scheduling. The scheduling unit 208 performs scheduling assignment based on the communication quality information in the communication quality storage unit 204, the QoS information in the QoS storage unit 205, and the basic performance information in the basic performance storage unit 206. Since terminal A has better basic performance than terminal B, and terminal B has better basic performance than terminal C, more scheduling is assigned to terminal A. For this reason, the ratio of the number of data packets transmitted per unit time is A: B: C = 11: 5: 2, as shown in FIG. Therefore, when basic performance information is used for scheduling, portable information terminals having excellent basic performance are allocated many times, and communication can be terminated quickly, so that efficient data transmission can be performed.

  In this way, the mobile information terminal with excellent basic performance is transmitted with a modulation scheme with high transmission efficiency, and more scheduling assignments are assigned. Therefore, the basic performance information is less than when not using the basic performance information. By determining the baseband processing contents and allocating scheduling by using them, more data can be transmitted efficiently, so that the throughput of the entire system can be improved.

  In the transmission baseband unit 209, data to be transmitted to the portable information terminal is encoded using the error correction method determined by the baseband determination unit 209 and the number of soft decision bits, and the encoded signal is transmitted to the baseband determination unit. Baseband processing is performed, such as modulation using the modulation method determined in 207. The signal subjected to the baseband processing is output to the transmission communication unit 212.

  The power determination unit 210 determines transmission power of a signal to be transmitted to the portable information terminal based on the communication quality information in the communication quality storage unit 204 and the basic performance information in the basic performance storage unit 206. Hereinafter, determination of transmission power will be described with reference to FIGS. 3 and 6.

  The transmission power of the base station is determined as a reference power value from the communication quality information. Here, since the communication quality of the portable information terminals A, B, and C is very good and equivalent, the reference powers of the portable information terminals A, B, and C are equivalent. The power determination unit 210 determines an increase / decrease value with respect to the current reference power value based on the reception sensitivity and the number of A / D conversion bits of the wireless performance of the basic performance information and the presence / absence of the canceller of the baseband performance. For example, FIG. 6 shows values to be added to the reference power value. The portable information terminal A with excellent reception performance can receive without error even if wireless communication is performed with a power 5 [dB] lower than the reference power value, so that there is no decrease in throughput, and the portable information terminal A has a normal reception performance. Terminal B performs wireless communication with power (0 [dB]) substantially equal to the reference power, and mobile information terminal C with poor reception performance performs wireless communication with power slightly higher than the reference power (2 [dB]). , To stabilize the throughput. Thereby, since the portable information terminal A having excellent basic performance can be transmitted with power lower than the reference power value, the transmission power of the base station can be reduced. Accordingly, since interference with other portable information terminals can be reduced, the throughput of the entire system can be improved.

  As described above, according to the present embodiment, a portable information terminal having excellent basic performance is obtained by performing communication processing such as modulation scheme determination, scheduling assignment, and transmission power control based on the basic performance of the portable information terminal. Can improve the data transmission efficiency, so that the throughput of the entire system can be improved, and the portable information terminal with excellent basic performance can also receive signals transmitted with weak power, The transmission power of the base station can be reduced.

  In the present embodiment, the basic performance detection unit 105 and the basic performance storage unit 106 have been described as functioning as detection means. However, the present invention is not limited to this, and the detection means has wireless performance and / or baseband performance. A storage unit that stores information to be displayed may be provided, and the information stored in the storage unit may be detected. Thereby, the time required for detecting the radio performance and / or the baseband performance can be shortened.

  The detecting means may detect the wireless performance at the current time. Accordingly, it is possible to detect the accurate wireless performance in response to the wireless performance of the communication unit at the time of manufacture changing with use.

  Further, in the present embodiment, the parameters are exemplified for the radio performance and the baseband performance, but the present invention is not limited to this, and many parameters may be included. For example, the number and order of templates used for scheduling, the control value of transmission power, and the like.

  The wireless communication system, the base station apparatus, and the portable information terminal apparatus according to the present invention improve the throughput of the entire system and reduce the power consumption of the base station by performing communication processing according to the basic performance of each portable information terminal. For example, it is useful for allocation of time scheduling.

The block diagram which shows the structure of the portable information terminal which concerns on one embodiment of this invention The block diagram which shows the structure of the base station which concerns on one embodiment of this invention The figure which shows the basic performance of the portable information terminal which concerns on one embodiment of this invention The figure which shows the contents of the baseband processing which the base station performs The figure for demonstrating the mode of the allocation of scheduling in one embodiment of this invention Diagram showing the value to be added to the reference power value

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Input part 102,205 QoS memory | storage part 103 Baseband part 104 Communication part 105 Basic performance detection part 106,206 Basic performance memory | storage part 201 Reception communication part 202 Reception baseband part 203 Communication quality estimation part 204 Communication quality memory | storage part 207 Base Band decision unit 208 Scheduling unit 209 Transmission baseband unit 210 Power decision unit 211 Power control unit 212 Communication unit for transmission

Claims (9)

In a wireless communication system in which a base station device and a portable information terminal device perform wireless communication,
The portable information terminal device
Detection means for detecting the basic performance of the device itself;
Notification means for notifying the base station apparatus of the basic performance detected by the detection means;
Have
The base station device
A wireless communication system comprising: communication processing means for performing communication processing on a signal transmitted to the portable information terminal device based on the basic performance notified from the portable information terminal device. Receiving means for receiving information indicating the basic performance of the portable information terminal device from a portable information terminal device which is a communication partner;
Communication processing means for performing communication processing of a signal to be transmitted to the portable information terminal device based on the basic performance information;
A base station apparatus comprising: The communication processing means includes
Scheduling means for determining a time schedule of a data packet to be transmitted to the portable information terminal device based on the basic performance information;
Baseband means for performing baseband processing of a signal to be transmitted to the portable information terminal device according to a time schedule determined by the scheduling means;
The base station apparatus according to claim 2, comprising: The communication processing means includes
Baseband determination means for determining at least one baseband processing content among modulation scheme, error correction scheme, presence / absence of canceller, and number of bits in soft decision based on the basic performance information;
Baseband means for performing baseband processing of a signal to be transmitted to the portable information terminal device according to the baseband processing content determined by the baseband determination means;
The base station apparatus according to claim 2, comprising:   The communication processing means comprises power control means for controlling transmission power of a signal to be transmitted to the portable information terminal device based on the basic performance information. The base station apparatus as described in. Detection means for detecting the basic performance of the device itself;
Notifying means for notifying the base station apparatus that is the communication counterpart of the basic performance detected by the detecting means;
A portable information terminal device comprising: The detection means includes
Comprising storage means for storing information indicating the wireless performance of the device itself;
The portable information terminal device according to claim 6, wherein information stored in the storage unit is detected.   The portable information terminal device according to claim 6, wherein the detection unit detects a wireless performance at a current time.   The portable information terminal device according to any one of claims 6 to 8, wherein the detection means detects baseband performance of the device itself.

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