JP2012060326A - Mobile terminal device and transmission power control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to accurately know the number of packets which do not reach a base station among uplink transmission packets in a mobile communication system.SOLUTION: A mobile terminal device of a mobile communication system in which data communication is performed between the mobile terminal device and a base station comprises: retransmission information detection means for detecting downlink retransmission information transmitted from the base station; and totalizing means for totalizing as retransmission response or non-retransmission response when the retransmission response or the non-retransmission response of the downlink retransmission information detected by the retransmission information detection means is corresponding to a previous uplink transmission packet, totalizing as untransmission when the retransmission response or the non-retransmission response of the downlink retransmission information is corresponding to a previous uplink untransmission, and transmitting the total number of the retransmission responses, the total number of the non-retransmission responses, and the total number of the untransmissions as totalized information to the base station.

Description

  The present invention relates to a mobile communication system, a mobile terminal device thereof, and a base station.

  HSUPA (High Speed Uplink Packet Access) defined in 3GPP (3rd Generation Partnership Project) Release 6 is a packet communication standard for speeding up in a mobile communication system. In HSUPA, the initial transmission power and ΔHARQ (power offset) are instructed in the RRC (Radio Resource Control) protocol transmitted from the base station (Node-B) to the UE in the power control of the mobile terminal (UE). Thereafter, a downlink dedicated channel on which SG (Serving Grant: transmission grant) information called E-AGCH (Enhanced-Absolute Grant Channel) and E-RGCH (Enhanced-Relativate Grant Channel) information is used.

  The E-AGCH notifies the transmission power of the E-DCH (Enhanced-Dedicated Channel) that the mobile terminal is allowed to transmit, and the E-RGCH updates the transmission power within a certain range with respect to the transmission power notified by the E-AGCH. Update information (UP, DOWN, HOLD) is notified.

  The mobile terminal calculates E-DCH transmission power according to the SG information from the base station, and transmits E-DPCCH (Enhanced-Dedicated Physical Control Channel) and E-DPDCH (Enhanced-Dedicated Physical Data Channel). E-DPDCH is an uplink data channel of HSUPA, and E-DPCCH is control information related to E-DPDCH to which E-TFCI, RSN, and Happy bits are mapped. The base station maps HARQ information (ACK, NACK) for E-DPDCH to E-HICH (Enhanced ARQ Indicator Channel) and transmits it.

The transmission procedure of HSUPA is as follows.
(1) When there is data to be transmitted by E-DPDCH, the mobile terminal transmits the amount of data to be transmitted by SI (Scheduling Information) and the priority information of the transmission data to the base station to request radio resource allocation. To do.
(2) The base station aggregates SI from a plurality of mobile terminals, and schedules transmission data control from the mobile terminals based on the communication quality and priority information of each mobile terminal that has been monitored in advance. As a result, for each mobile terminal, SG information is notified from the base station to the mobile terminal.
(3) There are two types of SG (Serving Grant) information, “Absolute Grant” and “Relative Grant”, which are mapped to E-AGCH and E-RGCH, respectively. “Absolute Grant” notifies the maximum transmission power that the mobile terminal is allowed to transmit, and “Relativ Grant” increases (UP) / decreases (DOWN) / contents notified by “Absolute Grant” / Three values of transmission power value hold (HOLD) are notified.

  The mobile terminal transmits E-DPCCH and E-DPDCH according to the SG information from the base station. E-TFCI, RSN, and Happy bit are mapped to E-DPCCH, and control information related to uplink data is transmitted. Uplink user data is transmitted by E-DPDCH. E-TFCI (E-DCH Transport Format Combination Indicator) is control information such as rate information, and RSN is a sequence number. “Happy bit” is a bit indicating whether or not the uplink resource of the mobile terminal can be used.

Unhappy (uplink resource unusable) is transmitted when the following three conditions are satisfied, and happy is transmitted under other conditions.
(A) Uplink data is transmitted at the upper limit of transmission power permitted by “Absolute Grant” and “Relativate Grant”.
(B) The maximum transmission power that can be transmitted by the mobile terminal is larger than the transmission power permitted in (A), and there is still power that can transmit data at a higher speed.
(C) The transmission data accumulated in the buffer of the mobile terminal cannot be sent within a predetermined time.

  That is, the maximum transmission power that can be transmitted by the mobile terminal is not reached (B), but transmission is performed with the transmission power allowed by the base station (A). However, the mobile terminal wants to increase the throughput of uplink transmission data (C). In this situation, the mobile terminal transmits Unhappy to the base station so as to increase the relative grant from the base station.

The base station finally determines the value of the relative grant for each mobile terminal based on the Happy bit from each mobile terminal in the same cell and the SI (priority of transmission data) from each mobile terminal. The relative grant instructed from the base station to the mobile terminal can be transmitted by the mobile terminal using SI transmitted from the mobile terminal to the base station before the HSUPA call connection and a Happy bit transmitted by the E-DPCCH during the HSDPA call connection. The base station schedules the appropriate power. When receiving an UP instruction, the mobile terminal can transmit E-DPDCH and E-DPCCH with higher power, can transmit a large amount of user data, and the uplink throughput increases. When a DOWN instruction is received, transmission is limited with smaller power, and uplink throughput is reduced.
(4) When the E-DPDCH from the mobile terminal to the base station is received in the base station and CRC check = OK, the base station maps the ACK to the E-HICH and transmits it, and receives the E-DCH If CRC check = NG, DTX (Discontinuous Transmission) is mapped to E-HICH and transmitted. This is equivalent to sending nothing.
(5) When the mobile terminal receives the ACK, the mobile terminal recognizes that the data has been transmitted and transmits the next data. When NACK or DTX is received, the corresponding data is recognized as undelivered and the same data is retransmitted.

  As shown in FIG. 1, when uplink E-DPDCH transmission is in a mixed OK / NG state, retransmission control is performed according to the ACK / NACK of downlink E-HICH and the state of E-HICH. When E-DCH TTI (Transmission Time Interval) = 10 ms, four processes # 0 to # 3 are transmitted in order. For example, in E-DPDCH of process 0, ACK is returned by HICH in response to transmission of new packet PKT1, and therefore new packet PKT5 is transmitted in E-DPDCH of next process 0. Further, since the NACK is returned by the HICH for the transmission of the new packet PKT2 in the process 1 E-DPDCH, the retransmission packet PKT2 is transmitted in the next E-DPDCH of the process 1. Further, since the ACK is returned by the HICH for the transmission of the new packet PKT3 in the E-DPDCH of the process 2, the new packet PKT6 is transmitted in the E-DPDCH of the next process 2. When E-DCH TTI = 2 ms, 8 processes # 0 to # 7 are transmitted in order.

  Next, FIG. 2 shows the case of DTX without uplink E-DPDCH transmission. Since E-DPDCH is packet data, the presence or absence of data occurs in units of TTI = 2 msec (or 10 msec), and no data is called DTX. In FIG. 2, the packets PKT3 and PKT5 are DTX. In the case of DTX which does not transmit PKT3 and PKT5, DTX which is neither ACK nor NACK is returned in downlink HICH.

  In E-HICH, ACK, NACK, and DTX are signals modulated by, for example, BPSK (Binary Phase Shift Keying). In the mobile terminal, if the signal amplitude of E-HICH exceeds the ACK threshold on the plus side, it is ACK. Determined. In the mobile terminal, if the signal amplitude is negative and less than the NACK threshold, it is determined as NACK, and if the signal amplitude is greater than or equal to the NACK threshold and less than or equal to the ACK threshold, it is determined as DTX. The mobile terminal counts ACK notified by downlink E-HICH as the number of AKC, counts NACK or DTX as NACK, and notifies the base station as a measurement report for debugging purposes. In this case, when the ACK notified by the downlink E-HICH is received, it is assumed that the previously transmitted E-DPDCH has reached the BTS side, the next transmission transmits a new packet, NACK and DTX are both NACK, This is because there is a 3GPP specification that the next transmission retransmits the same packet as the previous transmission, assuming that the E-DPDCH transmitted earlier does not reach the BTS side.

  By the way, when the HARQ receiving end receives the TFRI and NDI corresponding to the transmission packet, determines whether there is a DTX-NACK error based on the TFRI and NDI, and determines that there is a DTX-NACK error, the lost transmission A technique for sending an error report signal indicating a packet to a HARQ transmission end is known (see, for example, Patent Document 1).

JP 2008-5492 A

  Of the number of E-DPDCH transport blocks transmitted in the uplink, there is a distinction between the NACK return when the packet is actually transmitted and CRC check = NG, and the DTX return by E-DPDCH DTX transmission. Therefore, there is a problem that the number of packets that have not actually reached the base station among the packets that are actually transmitted by E-DPDCH is unknown. If the number of E-DPDCH actually transmitted does not reach the base station is known, it can be estimated that there is a problem in the mobile terminal on the transmission side such as insufficient E-DPDCH transmission power. It can also be improved to reach.

  Further, since downlink E-HICH has a constant transmission power from the base station to the mobile terminal, there is a possibility that the HICH result may be erroneously detected at the cell border. For example, DTX may be erroneously detected as ACK or NACK in the process of transmitting downlink HICH from the base station to the mobile terminal. Conversely, there is a risk that ACK is erroneously detected as DTX, or NACK is erroneously detected as DTX. When such a false detection occurs, a new transmission is originally performed where retransmission should be performed, or a position where new transmission is originally performed is retransmitted, leading to a decrease in throughput of the mobile terminal. was there.

  It is an object of the disclosed mobile communication system to accurately know the number of uplink transmission packets that do not reach the base station.

A mobile communication system according to an embodiment of the disclosure is a mobile communication system that performs data communication between a mobile terminal device and a base station,
The mobile terminal device
Retransmission information detecting means for detecting downlink retransmission information transmitted from the base station;
When the retransmission response or non-retransmission response of the downlink retransmission information detected by the retransmission information detection unit corresponds to the previous uplink transmission packet, the retransmission response or non-retransmission response in the downlink retransmission information is counted as a retransmission response or non-retransmission response. When the response corresponds to the previous uplink non-transmission, there is a totaling unit that counts as untransmitted and transmits the retransmission response total number, the non-retransmission response total number, and the untransmitted total number to the base station as total information.

  According to the present embodiment, it is possible to accurately know the number of uplink transmission packets that do not reach the base station.

It is a figure for demonstrating resending control. It is a figure for demonstrating the retransmission control in the case of DTX. It is a block diagram of one Embodiment of the mobile terminal device and base station in a mobile communication system. It is a block diagram of one Embodiment of the control part of a base station. It is a flowchart of one Embodiment of the transmission / reception process which a mobile terminal device performs. It is a flowchart of one Embodiment of the total process which a mobile terminal device performs. It is a flowchart of one Embodiment of the uplink transmission power control process which a base station performs. It is a flowchart of one Embodiment of the downlink transmission power control process which a base station performs.

  Embodiments will be described below with reference to the drawings.

<Configuration of mobile terminal apparatus and base station>
FIG. 3 shows a configuration diagram of an embodiment of a mobile terminal apparatus and a base station in a mobile communication system. In FIG. 3, a signal received by the antenna 11 of the mobile terminal apparatus 10 is supplied to the receiving unit 12. The receiving unit 12 demodulates E-RGCH, E-AGCH, and HICH and supplies them to the AG / RG detection unit 13 and the ACK / NACK detection unit 14.

  The AG / RG detection unit 13 detects UP, DOWN, and HOLD RG information from the E-RGCH, detects AG information that is the maximum transmission power from the E-AGCH, and transmits the detected RG information and AG information to the transmission power determination unit. 15 is supplied.

  The ACK / NACK detection unit 14 detects ACK, NACK, and DTX from E-HICH that is downlink retransmission information and supplies the ACK / NACK detection unit 14 to the measurement report unit 16 and the E-DPDCH data generation unit 17. The ACK / NACK detection unit 14 detects ACK when the signal amplitude is greater than the ACK threshold on the plus side, detects NACK when the signal amplitude is less than the NACK threshold on the minus side, and the signal amplitude is greater than or equal to the NACK threshold. If it is below the ACK threshold, DTX is detected.

  The transmission power determination unit 15 determines transmission power based on the RG information and AG information supplied from the AG / RG detection unit 13 and notifies the transmission unit 19 of the transmission power.

  The E-DPDCH data generation unit 17 selects a new packet for ACK and a retransmission packet for NACK according to the detection information of ACK, NACK, and DTX supplied from the ACK / NACK detection unit 14. The E-DPDCH data is generated with the selected packet and supplied to the transmitter 19.

  The E-DPCCH data generation unit 18 generates E-DPCCH data in which information such as SI, E-TFCI, RSN, Happy bit, etc. is mapped, and supplies it to the transmission unit 19 in accordance with an instruction from the upper layer of the device itself. The transmission unit 19 transmits the E-DPDCH from the E-DPDCH data generation unit 17 and the E-DPDCH from the E-DPCCH data generation unit 18 from the antenna 11 with the transmission power notified from the transmission power determination unit 15.

  The measurement report unit 16 sends the number of packets transmitted by the E-DPDCH from the E-DPDCH data generation unit 17 to 4 processes when TTI = 10 ms or 8 processes when TTI = 2 ms. Supplied and held. Of the ACKs detected by the E-HICH, the measurement report unit 16 recognizes the ACK corresponding to the transmission packet of the previous E-DPDCH of each process as a non-retransmission response “ACK”, and the previous E of each process. -ACK corresponding to DPDCH not transmitted (DTX) is recognized as untransmitted “DTX”. Further, among the NACKs detected by E-HICH, the measurement report unit 16 recognizes the NACK corresponding to the transmission packet of the previous E-DPDCH of each process as a retransmission response “NACK”, and the previous E-DPDCH of each process. NACK corresponding to non-transmission (DTX) is recognized as non-transmission “DTX”. The measurement reporting unit 16 then counts the numbers of the recognized “ACK”, “NACK”, and “DTX”.

  The measurement report unit 16 notifies the base station side of the number of ACKs, the number of NACKs, and the number of DTXs as a layer 3 message via a higher layer of its own device for every reporting period of, for example, several milliseconds to several seconds. .

  Thereby, the probability of erroneously detecting DTX as ACK or NACK can be reduced. Further, the number of NACK totals is the number of times the E-DPDCH transmission has not reached correctly, and the ACK / NACK rate in the actually transmitted E-DPDCH is known. This contributes to improvement of debugging efficiency.

<Configuration of control unit>
In FIG. 3, a signal received by the antenna 31 of the base station 30 is supplied to the receiving unit 32. The receiving unit 32 demodulates the E-DCH and supplies it to the control unit 33. The control unit 33 generates E-RGCH, E-AGCH, and HICH and supplies them to the transmission unit 34. The transmission unit 34 transmits E-RGCH, E-AGCH, and HICH supplied from the control unit 33 from the antenna 31.

  FIG. 4 shows a configuration diagram of an embodiment of the control unit 33 in the base station 30. In FIG. 4, the information acquisition unit 41 in the control unit 33 analyzes the layer 3 message transmitted from the mobile terminal device 10 to acquire each of the ACK count, NACK count, and DTX count, and the NACK rate calculation unit 42 and the DTX rate calculation unit 43.

  The NACK rate calculation unit 42 calculates the NACK rate (NACK rate = NACK total number / (ACK total number + NACK total number)) and supplies it to the RG / AG control unit 44. The RG / AG control unit 44 compares the NACK rate with a first threshold which is a retransmission response upper limit threshold of, for example, about 50%, and the NACK rate is equal to or higher than the first threshold, or the NACK rate is equal to or higher than the first threshold. When it is detected that the state has continued for a certain time (tNACK), it is determined that the uplink E-DCH has not reached the base station, and RG or E-AGCH of E-RGCH transmitted from E-RGCH & E-AGCH transmission unit 45 The AG is controlled to increase by a predetermined amount (for example, about 1 dB). Thereby, the uplink E-DCH transmission power of the mobile terminal apparatus is controlled to be increased, and the uplink E-DCH throughput is improved.

  Note that the RG / AG control unit 44 compares the NACK rate with a second threshold that is a retransmission response lower limit threshold of about 20%, for example, so that the NACK rate is equal to or lower than the second threshold, or the NACK rate is the second threshold. When it is detected that the following state has continued for a certain time (tNACK), the RG of E-RGCH or the AG of E-AGCH transmitted from E-RGCH & E-AGCH transmitter 45 is reduced by a predetermined amount (for example, about 1 dB). To control. Thereby, it is possible to prevent the uplink E-DCH transmission power of the mobile terminal apparatus from becoming excessive.

  The DTX rate calculation unit 43 calculates the DTX rate (DTX rate = DTX total number / (ACK total number + NACK total number)) and supplies it to the E-HICH control unit 46. The E-HICH control unit 46 compares the DTX rate with a third threshold that is an untransmitted upper limit threshold of, for example, about 50%, and the DTX rate is greater than or equal to the third threshold, or the DTX rate is greater than or equal to the third threshold. When it is detected that the state lasts for a certain time (tDTX), it is determined that the downlink HICH has not reached the mobile terminal, and the E-HICH transmission power transmitted from the E-HICH transmission unit 47 is a predetermined amount (for example, about 1 dB). Control the direction to raise only. Thus, the throughput of downlink E-HICH is improved by increasing the E-HICH transmission power.

  Note that the E-HICH control unit 46 compares the DTX rate with a fourth threshold that is a non-transmission lower limit threshold of, for example, about 20%, and the DTX rate is equal to or lower than the fourth threshold, or the DTX rate is the fourth threshold. When it is detected that the following state has been maintained for a certain time (tDTX), the E-HICH transmission power transmitted from the E-HICH transmission unit 47 is controlled to decrease by a predetermined amount (for example, about 1 dB). Thereby, it is possible to prevent the downlink E-HICH transmission power from becoming excessive.

<Transmission / reception processing executed by the mobile terminal>
FIG. 5 shows a flowchart of an embodiment of transmission / reception processing executed by the mobile terminal apparatus 10. In step S11 executed in the E-DCH TTI cycle, the receiving unit 12 receives E-HICH, E-RGCH, and E-AGCH. Next, in step S <b> 12, the ACK / NACK detection unit 14 detects ACK, NACK, and DTX from the received E-HICH and supplies them to the measurement report unit 16.

  In step S13, the measurement report unit 16 recognizes the ACK corresponding to the transmission packet of the previous E-DPDCH as “ACK” among the ACKs detected from the E-HICH, and corresponds to the previous transmission (DTX) of the E-DPDCH. ACK to be recognized is “DTX”. Of the NACKs detected by E-HICH, the NACK corresponding to the previous E-DPDCH transmission packet is recognized as “NACK”, and the NACK corresponding to the previous E-DPDCH non-transmission (DTX) is “DTX”. recognize. Then, aggregation is performed to obtain an ACK count, a NACK count, and a DTX count.

  In step S14, the measurement report unit 16 transmits the number of ACK counts, the number of NACK counts, and the number of DTX counts from the mobile terminal to the base station side via the upper layer of the own device.

  Next, in step S15, the E-DPDCH data generation unit 17 determines whether or not the detection result supplied from the ACK / NACK detection unit 14 is ACK. If the detection result is ACK, in step S16, the E-DPDCH data generation unit 17 generates E-DPDCH data using the next data, that is, a new packet. If the detection result is NACK, in step S17, the E-DPDCH data generation unit 17 generates E-DPDCH data using the retransmission packet.

  Next, in step S18, the transmission power determination unit 15 determines transmission power based on E-RGCH and E-AGCH, and in step S19, the transmission unit 19 transmits uplink E-DCH.

<Aggregating process executed by mobile terminal>
FIG. 6 shows a flowchart of an embodiment of the aggregation process executed by the mobile terminal device 10. In step S21 executed in the E-DCH TTI cycle, the reception unit 12 receives E-HICH, and detects ACK, NACK, and DTX from the E-HICH received by the ACK / NACK detection unit 14.

  In step S22, the measurement reporting unit 16 determines whether NACK or ACK is detected from the E-HICH. If NACK is detected, in step S24, the measurement reporting unit 16 determines whether the NACK corresponding to the previous E-DPDCH transmission packet. If it is NACK corresponding to the previous E-DPDCH transmission packet, it is recognized as NACK in step S25, and if it is NACK corresponding to the previous E-DPDCH untransmitted, it is recognized as DTX in step S26.

  On the other hand, if ACK is detected in step S22, the measurement report unit 16 determines in step S27 whether or not it is an ACK corresponding to the previous E-DPDCH transmission packet. If it is an ACK corresponding to the previous E-DPDCH transmission packet, it is recognized as ACK in step S28, and if it is an ACK corresponding to the previous E-DPDCH untransmitted, it is recognized as DTX in step S26.

  Next, in step S29, the measurement reporting unit 16 counts the number of recognized ACKs, NACKs, and DTXs. In step S30, it is determined whether or not it is a reporting cycle. If it is not a reporting cycle, the process proceeds to step SS21. If it is a reporting cycle, in step S31, the measurement reporting unit 16 notifies the base station side of the number of ACKs, the number of NACKs, and the number of DTXs as a layer 3 message via the upper layer of its own device.

<Uplink transmission power control process executed by base station>
FIG. 7 shows a flowchart of an embodiment of the uplink transmission power control process executed by the base station 10. In step S40 executed in the E-DCH TTI cycle, the NACK rate calculation unit 42 calculates the NACK rate (NACK rate = NACK count / (ACK count + NACK count)) from the ACK count, NACK count, and DTX count. calculate.

  In step S41, the RG / AG control unit 44 determines whether or not the NACK rate is equal to or higher than a first threshold value, for example, about 50%. If the NACK rate is equal to or higher than the first threshold value, the E-RGCH & E-AGCH transmission unit is determined in step S42. The RG of E-RGCH transmitted from 45 or the AG of E-AGCH is controlled to increase. Thereby, the uplink E-DCH transmission power of the mobile terminal is controlled to increase.

  On the other hand, if the NACK rate is less than the first threshold value, in step S43, the RG / AG control unit 44 determines whether the NACK rate is equal to or less than a second threshold value of about 20%, for example, and the NACK rate is equal to or less than the second threshold value. If there is, the uplink E-DCH transmission power is regarded as excessive, and the E-RGCH RG or E-AGCH AG transmitted from the E-RGCH & E-AGCH transmission unit 45 is controlled to decrease in step S44.

  After executing step S42 or S44, or if the NACK rate exceeds the second threshold value in step S43, the process proceeds to step S40.

<Downlink transmission power control processing executed by base station>
FIG. 8 shows a flowchart of an embodiment of a downlink transmission power control process executed by the base station 10. In step S50 executed in the E-DCH TTI cycle, the DTX rate calculation unit 43 calculates the DTX rate (DTX rate = DTX count / (ACK count + NACK count)) from the ACK count, NACK count, and DTX count. calculate.

  In step S51, the E-HICH control unit 46 determines whether or not the DTX rate is greater than or equal to a third threshold value of, for example, about 50%. If the DTX rate is greater than or equal to the third threshold value, the E-HICH transmission unit 47 determines in step S52. Control to increase the downlink E-HICH transmission power to be transmitted.

  On the other hand, if the DTX rate is less than the third threshold value, in step S53, the E-HICH control unit 46 determines whether or not the DTX rate is equal to or less than a fourth threshold value of, for example, about 20%, and the DTX rate is equal to or less than the fourth threshold value. If there is, the downlink E-HICH transmission power is excessive, and the downlink E-HICH transmission power transmitted from the E-HICH transmission unit 47 is controlled to decrease in step S54.

After executing step S52 or S54, or if the DTX rate exceeds the fourth threshold value in step S53, the process proceeds to step S50.
(Appendix 1)
In a mobile communication system that performs data communication between a mobile terminal device and a base station,
The mobile terminal device
Retransmission information detecting means for detecting downlink retransmission information transmitted from the base station;
When the retransmission response or non-retransmission response of the downlink retransmission information detected by the retransmission information detection unit corresponds to the previous uplink transmission packet, the retransmission response or non-retransmission response in the downlink retransmission information is counted as a retransmission response or non-retransmission response. When the response corresponds to the previous uplink untransmitted, it is counted as untransmitted, and has a counting means for transmitting the total number of retransmission responses, the number of non-retransmitted responses and the number of untransmitted totals to the base station as total information. Mobile communication system.
(Appendix 2)
In the mobile communication system according to attachment 1,
The base station
Total information receiving means for receiving the total information transmitted by the total means;
The uplink response rate is calculated from the aggregate information received by the aggregate information receiving means, and when the calculated retransmission response rate is equal to or greater than a predetermined retransmission response upper limit threshold, the uplink transmission power transmitted by the mobile terminal apparatus is increased. A mobile communication system comprising transmission power control means.
(Appendix 3)
In the mobile communication system according to attachment 2,
The base station
Downlink transmission power control for calculating a non-transmission rate from the total information received by the total information receiving means, and for increasing the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or greater than a predetermined non-transmission upper limit threshold A mobile communication system comprising means.
(Appendix 4)
In a mobile terminal device of a mobile communication system that performs data communication,
Retransmission information detecting means for detecting downlink retransmission information transmitted from the base station;
When the retransmission response or non-retransmission response of the downlink retransmission information detected by the retransmission information detection unit corresponds to the previous uplink transmission packet, the retransmission response or non-retransmission response in the downlink retransmission information is counted as a retransmission response or non-retransmission response. When the response corresponds to the previous uplink untransmitted, it is counted as untransmitted, and has a counting means for transmitting the total number of retransmission responses, the number of non-retransmitted responses and the number of untransmitted totals to the base station as total information. Mobile terminal device.
(Appendix 5)
In a base station that is wirelessly connected to the mobile terminal device described in Appendix 4,
Total information receiving means for receiving the total information transmitted by the total means;
The uplink response rate is calculated from the aggregate information received by the aggregate information receiving means, and when the calculated retransmission response rate is equal to or greater than a predetermined retransmission response upper limit threshold, the uplink transmission power transmitted by the mobile terminal apparatus is increased. A base station comprising transmission power control means.
(Appendix 6)
In the base station described in Appendix 5,
Downlink transmission power control for calculating a non-transmission rate from the total information received by the total information receiving means, and for increasing the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or greater than a predetermined non-transmission upper limit threshold A base station comprising means.
(Appendix 7)
In the mobile communication system according to attachment 3,
The mobile communication system, wherein the uplink transmission power control means performs control to reduce uplink transmission power transmitted by the mobile terminal apparatus when the calculated retransmission response rate is equal to or less than a predetermined retransmission response lower limit threshold.
(Appendix 8)
In the mobile communication system according to appendix 7,
The mobile communication system according to claim 1, wherein the downlink transmission power control means performs control to reduce the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or less than a predetermined non-transmission lower limit threshold.
(Appendix 9)
In the base station described in Appendix 6,
The base station characterized in that the uplink transmission power control section performs control to reduce uplink transmission power transmitted by the mobile terminal apparatus when the calculated retransmission response rate is equal to or less than a predetermined retransmission response lower limit threshold.
(Appendix 10)
In the base station described in Appendix 9,
The base station, wherein the downlink transmission power control means performs control to reduce the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or less than a predetermined non-transmission lower limit threshold.

DESCRIPTION OF SYMBOLS 10 Mobile terminal apparatus 11 Antenna 12 Receiving part 13 AG / RG detection part 14 ACK / NACK detection part 15 Transmission power determination part 16 Measurement report part 17 E-DPDCH data generation part 18 E-DPCCH data generation part 19 Transmission part 30 Base Station 31 Antenna 32 Reception unit 33 Control unit 34 Transmission unit 41 Information acquisition unit 42 NACK rate calculation unit 43 DTX rate calculation unit 44 RG / AG control unit 45 E-RGCH & E-AGCH transmission unit 46 E-HICH control unit 47 E-HICH Transmitter

Claims (6)

In a mobile communication system that performs data communication between a mobile terminal device and a base station,
The mobile terminal device
Retransmission information detecting means for detecting downlink retransmission information transmitted from the base station;
When the retransmission response or non-retransmission response of the downlink retransmission information detected by the retransmission information detection unit corresponds to the previous uplink transmission packet, the retransmission response or non-retransmission response in the downlink retransmission information is counted as a retransmission response or non-retransmission response. When the response corresponds to the previous uplink untransmitted, it is counted as untransmitted, and has a counting means for transmitting the total number of retransmission responses, the number of non-retransmitted responses and the number of untransmitted totals to the base station as total information. Mobile communication system. The mobile communication system according to claim 1, wherein
The base station
Total information receiving means for receiving the total information transmitted by the total means;
The uplink response rate is calculated from the aggregate information received by the aggregate information receiving means, and when the calculated retransmission response rate is equal to or greater than a predetermined retransmission response upper limit threshold, the uplink transmission power transmitted by the mobile terminal apparatus is increased. A mobile communication system comprising transmission power control means. The mobile communication system according to claim 2,
The base station
Downlink transmission power control for calculating a non-transmission rate from the total information received by the total information receiving means, and for increasing the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or greater than a predetermined non-transmission upper limit threshold A mobile communication system comprising means. In a mobile terminal device of a mobile communication system that performs data communication,
Retransmission information detecting means for detecting downlink retransmission information transmitted from the base station;
When the retransmission response or non-retransmission response of the downlink retransmission information detected by the retransmission information detection unit corresponds to the previous uplink transmission packet, the retransmission response or non-retransmission response in the downlink retransmission information is counted as a retransmission response or non-retransmission response. When the response corresponds to the previous uplink untransmitted, it is counted as untransmitted, and has a counting means for transmitting the total number of retransmission responses, the number of non-retransmitted responses and the number of untransmitted totals to the base station as total information. Mobile terminal device. In the base station wirelessly connected to the mobile terminal device according to claim 4,
Total information receiving means for receiving the total information transmitted by the total means;
The uplink response rate is calculated from the aggregate information received by the aggregate information receiving means, and when the calculated retransmission response rate is equal to or greater than a predetermined retransmission response upper limit threshold, the uplink transmission power transmitted by the mobile terminal apparatus is increased. A base station comprising transmission power control means. The base station according to claim 5,
Downlink transmission power control for calculating a non-transmission rate from the total information received by the total information receiving means, and for increasing the transmission power of the downlink retransmission information when the calculated non-transmission rate is equal to or greater than a predetermined non-transmission upper limit threshold A base station comprising means.

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