JP2006191320A - Method of controlling transmission rate and mobile station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure stable transmission quality by controlling the transmission rate of user data based on the receiving state of an affirmative delivery confirmation signal (Ack). <P>SOLUTION: A method of controlling the transmission rate includes a step of controlling the transmission rate of user data transmitted per data block, and selecting the greatest transmitting data block size from the transmitting data block size of the data block which is transmitted into predetermined periods and which received the affirmative delivery confirmation request; and a step of determining the transmitting data block size of the data block which then transmits on the basis of the selected greatest transmitting data block size. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transmission rate control method for controlling the transmission rate of user data transmitted in units of data blocks and a mobile station in a mobile communication system employing N process stop and weight.

  In the conventional mobile communication system, the radio network controller RNC, in the uplink from the mobile station UE to the radio base station NodeB, the radio resources of the radio base station NodeB, the interference amount in the uplink, the transmission power of the mobile station UE, In consideration of the transmission processing performance of the mobile station UE, the transmission rate required by the upper application, etc., the transmission rate of the dedicated channel is determined, and the mobile station UE and the radio are transmitted by a layer 3 (Radio Resource Control Layer) message. Each base station NodeB is configured to notify the determined transmission rate of the dedicated channel.

  Here, the radio network controller RNC is an apparatus that exists above the radio base station NodeB and controls the radio base station NodeB and the mobile station UE.

  In general, in data communication, traffic often occurs in a burst manner as compared with voice calls and TV calls. Originally, it is desirable to change the transmission speed of a channel used for data communication at a high speed.

  However, as shown in FIG. 16, the radio network controller RNC normally controls a number of radio base stations NodeB in an integrated manner. Therefore, in the conventional mobile communication system, due to processing load, processing delay, and the like. There is a problem that it is difficult to control the change of the transmission speed of a high-speed channel (for example, about 1 to 100 ms).

  In addition, in the conventional mobile communication system, there is a problem that even if the high-speed channel transmission rate change control can be performed, the device mounting cost and the network operation cost are significantly increased.

  For this reason, in a conventional mobile communication system, it is usual to perform channel transmission rate change control in the order of several hundreds ms to several s.

  Therefore, in the conventional mobile communication system, as shown in FIG. 17 (a), when performing bursty data transmission, as shown in FIG. 17 (b), low speed, high delay and low transmission efficiency are allowed. As shown in FIG. 17 (c), radio resources for high-speed communication are secured and radio resources in idle time and hardware resources in the radio base station NodeB are wasted. Data is transmitted with permission.

  However, in FIG. 17, it is assumed that both the above-described radio band resource and hardware resource are applied to the radio resource on the vertical axis.

  Therefore, in “3GPP” and “3GPP2”, which are international standardization organizations of the third generation mobile communication system, in order to effectively use radio resources, the layer 1 and the MAC sublayer between the radio base station NodeB and the mobile station UE ( High-speed radio resource control methods in layer 2) have been studied. Hereinafter, such a study or a function that has been studied will be collectively referred to as an “uplink enhancement (EUL)”.

  Conventionally, radio resource control methods that have been studied in “uplink enhancement” can be broadly classified into three as follows. Hereinafter, this radio resource control method will be outlined.

  First, a radio resource control method called “Time & Rate Control” has been studied.

  In this radio resource control method, the radio base station NodeB determines a mobile station UE that permits transmission of user data and a transmission rate of user data at each predetermined timing, and together with the mobile station ID, a transmission rate of user data ( Alternatively, information on the maximum allowable transmission rate of user data) is broadcast.

  Then, the mobile station UE designated by the radio base station NodeB transmits user data at the designated timing and transmission rate (or within the range of the maximum allowable transmission rate).

  Secondly, a radio resource control method called “Rate Control per UE” has been studied.

  In this radio resource control method, each mobile station UE can transmit the user data if there is user data to be transmitted to the radio base station NodeB. However, the maximum allowable transmission rate of the user data is determined for each transmission frame. Alternatively, for each of a plurality of transmission frames, one determined by the radio base station NodeB and notified to each mobile station UE is used.

  Here, when the radio base station NodeB notifies the maximum allowable transmission rate, the maximum allowable transmission rate at the timing itself or a relative value of the maximum allowable transmission rate (for example, two values of UP / DOWN). Notice.

  Thirdly, a radio resource control method called “Rate Control per Cell” has been studied.

  In this radio resource control method, the radio base station NodeB broadcasts the transmission rate of user data common to the mobile station UE in communication, or information necessary for calculating the transmission rate, and each mobile station Based on the received information, the transmission rate of user data is determined.

  “Time & Rate Control” and “Rate Control per UE” may ideally be the best control method for improving the radio capacity in the uplink, but the amount of data remaining in the buffer of the mobile station UE In addition, since it is necessary to assign the transmission rate of user data after grasping the transmission power and the like in the mobile station UE, there is a problem that the control load by the radio base station NodeB increases.

  In addition, these radio resource control methods have a problem that overhead due to exchange of control signals becomes large.

  On the other hand, the “Rate Control per Cell” is a radio base station NodeB that broadcasts information common to cells, and each mobile station UE autonomously obtains the transmission rate of user data based on the received information. There is an advantage that the control load by the radio base station NodeB is small.

  However, since the radio base station Nodeb needs to be configured so that any mobile station UE can receive user data in the uplink, in order to effectively use the radio capacity in the uplink, There has been a problem that the device scale of the radio base station NodeB increases.

  Therefore, for example, as shown in Non-Patent Document 1, the mobile station UE increases the transmission rate of user data from the initial transmission rate notified in advance according to a predetermined rule. A method has been proposed in which a large amount of radio capacity is prevented and, as a result, an increase in the device scale of the radio base station is prevented.

  As shown in Non-Patent Document 1, in this method, the following two methods have been proposed as methods for increasing the transmission rate of user data.

  The first method is to increase the transmission data block size of the previous transmission time unit (TTI) regardless of whether the mobile station UE receives a positive acknowledgment signal (Ack) or not. This is a method for increasing the transmission rate of user data.

  The second method increases the transmission rate of user data by increasing the transmission data block size of the data block corresponding to the Ack when the mobile station UE receives a positive acknowledgment signal (Ack). It is a method to make it.

  In uplink enhancement, N process stop-and-wait (or N-channel stop-and-wait) is used for retransmission control processing.

  FIG. 18 shows the operation principle of a four-process stop and wait (N Process Stop and Wait). As illustrated in FIG. 18, as illustrated in FIG. 18, a time lag occurs after the data transmission side device transmits a transmission data block and receives a transmission confirmation signal of the transmission data block. In the example of FIG. 18, such a time lag is not less than 2 times and not more than 3 times the transmission time of the transmission data block, and therefore the timing at which the transmission data block is retransmitted is after three transmission data blocks.

  In this case, as shown in FIG. 18, it can be considered that four HARQs are operating in parallel, and this is called stop and wait of four processes.

In order to determine the number N of HARQ to be operated in parallel according to the transmission time of the transmission data block, the time lag until receiving the delivery confirmation signal, the processing delay in the data transmission side device and the data reception side device, etc., N processes Called stop-and-wait.
3GPP TSG-RAN R1-040773

  However, if the first method described above is used, the transmission rate of user data can be increased rapidly, but the mobile station UE does not know whether or not the reception of user data by the radio base station NodeB has succeeded. Since the transmission rate of user data is increased, there is a problem in that reception errors are likely to occur in the radio base station NodeB due to the lack of appropriate radio communication resources.

  Further, the second method has a problem that no clear processing method has been studied other than increasing the transmission rate of user data when each mobile station UE receives Ack.

  Therefore, the present invention has been made in view of the above points. By controlling the transmission rate of user data based on the reception status of a positive acknowledgment signal (Ack), it is possible to ensure stable communication quality. It is an object of the present invention to provide a transmission rate control method and a mobile station that can be enabled.

  A first feature of the present invention is a transmission rate control method for controlling a transmission rate of user data transmitted in units of data blocks in a mobile communication system adopting N process stop and weight, in a predetermined process The maximum transmission data block size is selected from the transmission data block sizes used in the data block that was transmitted within the predetermined period and that received the positive acknowledgment request. The gist of the invention is to include a step of selecting as a data block size and a step of determining a transmission data block size of a data block to be transmitted next in the predetermined process based on the first transmission data block size.

  In the first aspect of the present invention, in the determining step, the transmission data block size may be determined by increasing the first transmission data block size according to a predetermined rule.

  In the first aspect of the present invention, the step of selecting the maximum transmission data block size as the second transmission data block size from the transmission data block sizes used in the data blocks transmitted within the predetermined period. In the step of determining, a larger transmission data block size of the first transmission data block size and the second transmission data block size may be determined as the transmission data block size.

  In the first aspect of the present invention, in the determining step, a larger transmission data block size is selected from the first transmission data block size and the second transmission data block size that are increased according to a predetermined rule. The block size may be determined.

  A second feature of the present invention is a transmission rate control method for controlling a transmission rate of user data transmitted in units of data blocks in a mobile communication system employing N process stop and weight, in a predetermined process. The maximum transmission power ratio is selected from the transmission power ratios between the data channel and the control channel related to the data block transmitted within a predetermined period and having received a positive acknowledgment request. The present invention includes a step of selecting a transmission power ratio of 1 and a step of determining a transmission power ratio of a data block to be transmitted next in the predetermined process based on the first transmission power ratio.

  In the second aspect of the present invention, in the determining step, the transmission power ratio may be determined by increasing the first transmission power ratio according to a predetermined rule.

  In the second aspect of the present invention, the method includes a step of selecting the maximum transmission power ratio as the second transmission power ratio from the transmission power ratios used in the data blocks transmitted within the predetermined period. In the determining step, a larger transmission power ratio among the first transmission power ratio and the second transmission power ratio may be determined as the transmission power ratio.

  In the second feature of the present invention, in the step of determining, a larger transmission power ratio is determined as the transmission power ratio among the first transmission power ratio and the second transmission power ratio increased by a predetermined rule. May be.

  A third feature of the present invention is a mobile station for controlling a transmission rate of user data transmitted in units of data blocks to a radio base station in a mobile communication system employing N process stop and weight. A maximum of the transmission data block sizes used in the data block transmitted to the radio base station within a predetermined period in a predetermined process and used in the data block that received the positive delivery confirmation request. And a data block to be transmitted next to the radio base station in the predetermined process based on the first transmission data block size, and a selection unit that selects the transmission data block size of the first transmission data block size And determining a transmission data block size.

  In the third aspect of the present invention, the determination unit may be configured to determine the transmission data block size by increasing the first transmission data block size according to a predetermined rule.

  In the third feature of the present invention, the selection unit selects a maximum transmission data block size from among transmission data block sizes used in data blocks transmitted within the predetermined period, and sets the second transmission data block The size is selected as a size, and the determination unit determines a larger transmission data block size as the transmission data block size among the first transmission data block size and the second transmission data block size. It may be configured.

  In the third aspect of the present invention, the determination unit determines a transmission data block size that is larger among the first transmission data block size and the second transmission data block size increased according to a predetermined rule as the transmission data block. It may be configured to determine the size.

  In the third aspect of the present invention, the determination unit may be configured to increase the transmission data block size until a maximum allowable transmission rate notified from the radio base station is reached.

  A fourth feature of the present invention is a mobile station for controlling a transmission rate of user data transmitted in units of data blocks to a radio base station in a mobile communication system employing N process stop and weight. The transmission power of the data channel and the control channel used in the data block transmitted to the radio base station within a predetermined period in a predetermined process and having received a positive delivery confirmation request A selection unit that selects a maximum transmission power ratio as a first transmission power ratio from among the ratios, and a transmission to the radio base station next in the predetermined process based on the first transmission power ratio And a determination unit that determines a transmission power ratio of the data block to be processed.

  In the fourth aspect of the present invention, the determining unit may be configured to determine the transmission power ratio by increasing the first transmission power ratio according to a predetermined rule.

  In the fourth aspect of the present invention, the selection unit selects a maximum transmission power ratio as a second transmission power ratio from among transmission power ratios used in data blocks transmitted within the predetermined period. The determination unit may be configured to determine a larger transmission power ratio among the first transmission power ratio and the second transmission power ratio as the transmission power ratio. .

  In the fourth feature of the present invention, the determination unit determines a larger transmission power ratio as the transmission power ratio among the first transmission power ratio and the second transmission power ratio increased according to a predetermined rule. It may be configured as follows.

  In the fourth aspect of the present invention, the determination unit may be configured to increase the transmission power ratio until the maximum allowable transmission rate notified from the radio base station is reached.

  As described above, according to the present invention, the transmission rate that enables stable communication quality to be secured by controlling the transmission rate of user data based on the reception status of the positive acknowledgment signal (Ack). A control method and a mobile station can be provided.

(Configuration of mobile communication system according to the first embodiment of the present invention)
The configuration of the mobile communication system according to the first embodiment of the present invention will be described with reference to FIGS. The mobile communication system according to the present embodiment includes a plurality of radio base stations NodeB # 1 to # 5 and a radio network controller RNC as shown in FIG.

  In the mobile communication system according to the present embodiment, the mobile station UE is configured to control the transmission rate of user data transmitted to the radio base station NodeB in units of data blocks in the uplink.

  In the mobile communication system according to the present embodiment, “HSDPA” is used in the downlink, and “EUL (uplink enhancement)” is used in the uplink. In both “HSDPA” and “EUL”, retransmission control by HARQ (N process stop and wait) is performed.

  Therefore, in the uplink, an enhanced dedicated physical data channel (E-DPDCH: Enhanced Dedicated Physical Channel) and an enhanced dedicated physical control channel (E-DPCCH: Enhanced Dedicated Physical Channel) is configured as an enhanced dedicated physical channel (E-DPDCH: Enhanced Dedicated Physical Channel). DPCH: Enhanced Dedicated Physical Channel (DPCH): Dedicated Physical Data Channel (DPDCH: Dedicated Physical Data Channel) and Dedicated Physical Control Channel (DPCCH: Dedicated Physical Control Channel) DPCH: Dedicated Physical Channel) is used.

  Here, the enhanced dedicated physical control channel (E-DPCCH) is a transmission format number for defining the transmission format (transmission block size, etc.) of E-DPDCH, information on HARQ (number of retransmissions, etc.), information on scheduling, etc. EUL control data such as (transmission power and buffer retention amount in the mobile station UE) is transmitted.

  Further, the enhanced dedicated physical data channel (E-DPDCH) is mapped to the enhanced dedicated physical control channel (E-DPCCH), and the EUL control data transmitted by the enhanced dedicated physical control channel (E-DPCCH) Based on this, user data for the mobile station UE is transmitted.

  The dedicated physical control channel (DPCCH) is a pilot symbol used for RAKE combining or SIR measurement, a TFCI (Transport Format Combination Indicator) for identifying the transmission format of the uplink dedicated physical data channel (DPDCH), and the downlink Control data such as a transmission power control bit is transmitted.

  The dedicated physical data channel (DPDCH) is mapped to the dedicated physical control channel (DPCCH), and user data for the mobile station UE is transferred based on the control data transmitted on the dedicated physical control channel (DPCCH). Send. However, when there is no user data to be transmitted in the mobile station UE, the dedicated physical data channel (DPDCH) may be configured not to be transmitted.

  In the uplink, a high-speed dedicated physical control channel (HS-DPCCH) required when HSPDA is applied and a random access channel (RACH) are also used.

  The high-speed dedicated physical control channel (HS-DPCCH) transmits a downlink quality identifier (CQI: CPICH Quality Indicator) and a delivery confirmation signal (Ack or Nack) for a high-speed dedicated physical data channel.

  As shown in FIG. 1, the mobile station UE according to the present embodiment includes a bus interface 31, a call processing unit 32, a baseband processing unit 33, an RF unit 34, and a transmission / reception antenna 36.

  However, such functions may exist independently as hardware, may be partly or wholly integrated, or may be configured by a software process.

  The bus interface 31 is configured to transfer user data output from the call processing unit 32 to another functional unit (for example, a functional unit related to an application). The bus interface 31 is configured to transfer user data transmitted from another function unit (for example, a function unit related to an application) to the call processing unit 32.

  The call processing unit 32 is configured to perform call control processing for transmitting and receiving user data.

  The baseband signal processing unit 33 performs layer 1 processing including despreading processing, RAKE combining processing, and FEC decoding processing, MAC-e processing, and MAC-d processing on the baseband signal transmitted from the RF unit 34. It is configured to transmit the user data acquired by performing the MAC processing including the RLC processing to the call processing unit 32.

  Further, the baseband signal processing unit 33 performs RLC processing, MAC processing, and layer 1 processing on the user data transmitted from the call processing unit 32 to generate a baseband signal and transmit it to the RF unit 34. It is configured.

  A specific function of the baseband signal processing unit 33 will be described later. The RF unit 34 generates a baseband signal by performing detection processing, filtering processing, quantization processing, and the like on the signal in the radio frequency band received via the transmission / reception antenna 35, and sends the baseband signal to the baseband signal processing unit 33. Configured to send. The RF unit 34 is configured to convert the baseband signal transmitted from the baseband signal processing unit 33 into a signal in a radio frequency band.

  As shown in FIG. 2, the baseband signal processing unit 33 includes an RLC processing unit 33a, a MAC-d processing unit 33b, a MAC-e processing unit 33c, and a layer 1 processing unit 33d.

  The RLC processing unit 33a is configured to process the user data transmitted from the call processing unit 32 in an upper layer of layer 2 and transmit the processed data to the MAC-d processing unit 33b.

  The MAC-d processing unit 33b is configured to add a channel identifier header and create an uplink transmission format based on the limit of uplink transmission power.

  As shown in FIG. 3, the MAC-e processing unit 33c includes an E-TFC selection unit 33c1 and a HARQ processing unit 33c2.

  Based on the scheduling signal transmitted from the radio base station NodeB, the E-TFC selection unit 33c1 transmits transmission formats (E-TFC) of the enhanced dedicated physical data channel (E-DPDCH) and the enhanced dedicated physical control channel (E-DPCCH). ) Is configured to determine.

  Further, the E-TFC selection unit 33c1 transmits transmission format information (transmission data block size, transmission of the enhanced dedicated physical data channel (E-DPDCH) and the enhanced dedicated physical control channel (E-DPCCH)) about the determined transmission format. Power ratio etc.) is transmitted to the layer 1 processing unit 33d, and the determined transmission data block size or transmission power ratio is transmitted to the HARQ processing unit 33c2.

  Here, the scheduling signal is the maximum allowable transmission rate of the user data in the mobile station UE or a variable related to the maximum allowable transmission rate of the user data (for example, the maximum allowable transmission data block size or the enhanced dedicated physical data channel). (E-DPDCH) and the enhanced dedicated physical control channel (E-DPCCH) maximum transmission power ratio (maximum allowable transmission power ratio, etc.).

  This scheduling signal is information broadcast in the sector where the mobile station UE is located, and all mobile stations located in the sector or a specific group located in the sector Control information for mobile stations.

  The E-TFC selection unit 33c1 is a data block transmitted to the radio base station NodeB within a predetermined period in a predetermined process, and is used for a data block that has received a positive delivery confirmation request (Ack). The maximum transmission data block size is selected as the first transmission data block size from the transmission data block sizes.

  Specifically, the E-TFC selection unit 33c1 is configured to acquire a speed holding timer T from the radio network controller RNC when setting up a connection for transmitting user data in the uplink. . And the E-TFC selection part 33c1 is comprised so that the above-mentioned predetermined period may be measured by the speed holding timer T (that is, the effective period of the speed holding timer T becomes the above-mentioned predetermined period).

  Further, the E-TFC selection unit 33c1 is configured to determine the transmission data block size of the data block to be transmitted next to the radio base station NodeB based on the first transmission data block size.

  Here, the E-TFC selection unit 33c1 increases the transmission data block size of the next data block to be transmitted until the maximum allowable transmission rate (maximum allowable transmission data block size) notified from the radio base station NodeB is reached. It is configured to go.

  Further, the E-TFC selection unit 33c1 sets the maximum transmission data block size from the transmission data block sizes used in the data blocks transmitted within a predetermined period (in all processes) to the second transmission data. A block size is selected, and a larger transmission data block size is determined as the transmission data block size among the first transmission data block size and the second transmission data block size increased by a predetermined rule. It is configured.

  That is, each process of the E-TFC selection unit 33c1 determines a data block to be transmitted next with a transmission data block size used in another process within a predetermined period unless a negative acknowledgment signal is received. Designed to be able to send.

  With reference to FIG. 4 and FIG. 5, an example of a transmission data block size determination method by the E-TFC selection unit 33c1 will be described. In the example of FIGS. 4 and 5, four process stop and weights are used.

In FIG. 4, since each process # 1 to # 4 of the E-TFC selection unit 33c1 has not yet reached Ack / Nack from the radio base station NodeB from the start of transmission until t = 4 (4TTI), initial transmission is performed. The data block is transmitted with the data block size (see “S _initial ” in FIG. 5).

  Next, the process # 1 of the E-TFC selection unit 33c1 transmits at t = 1 because Ack has reached the data block transmitted at t = 1 (1 TTI) at t = 5 (5 TTI). The transmission data block size of the selected data block is selected as the first transmission data block size.

After that, the E-TFC selection unit 33c1 sets the first transmission data block size as a predetermined rule with reference to a graph (FIG. 5) that associates the selected transmission data block size with the updated transmission data block size. Increase from “S _initial ” to “S _initial + ΔS”.

  As shown in FIG. 5, the predetermined rule is such that the updated transmission data block size is larger than the selected transmission data block size (the past maximum transmission data block size). As a result, the mobile station UE is configured to increase the transmission rate of user data with time.

  Since the second transmission data block size selected in a predetermined period (for example, t = 1 to 4) is smaller than the updated first transmission data block size (increased by a predetermined rule), E− Process # 1 of the TFC selection unit 33c1 determines the updated first transmission data block size as the transmission data block size of the data block to be transmitted at t = 5.

  In addition, the process # 2 of the E-TFC selection unit 33c1 originally has a transmission data block size (second transmission data block) already transmitted at t = 5 (5 TTI) at t = 6 (6 TTI). In the example of FIG. 4, the data block transmitted at t = 2 (2 TTI) is t = 2 (2TTI) and retransmit with the same transmission data block size.

  Further, since the process # 2 of the E-TFC selection unit 33c1 receives the Ack for the data block transmitted at t = 6 (6 TTI) at t = 10 (10 TTI), the first transmission data block size As described above, the transmission data block of the data block transmitted at t = 6 (6 TTI) is selected. Further, the process # 2 of the E-TFC selection unit 33c1 selects the transmission data block of the data block transmitted at t = 9 (9 TTI) as the second transmission data block size (for example, the predetermined period = 4 TTI).

  In such a case, since the second transmission data block size is larger than the first transmission data block size increased by a predetermined rule, the process # 2 of the E-TFC selection unit 33c1 determines that t = 10 (10 TTIs). ), The data block is transmitted in the transmission data block of the data block transmitted at t = 9 (9 TTI).

  However, as described above, the E-TFC selection unit 33c1 determines the maximum allowable transmission rate or a variable related to the maximum allowable transmission rate (for example, the maximum allowable transmission data block) from the sector where the mobile station UE is located. Therefore, the transmission rate of user data is increased within a range not exceeding the maximum allowable transmission rate.

  The HARQ processing unit 33c2 performs process management of “stop and wait for N processes”, and based on the delivery confirmation signal (Ack / Nack for uplink data) received from the radio base station NodeB, the user data in the uplink It is configured to transmit.

  Specifically, the HARQ processing unit 33c2 determines whether or not the downlink user data reception process is successful based on the CRC result input from the layer 1 processing unit 33d. Then, the HARQ processing unit 33c2 generates a delivery confirmation signal (Ack or Nack for downlink user data) based on the determination result and transmits it to the layer 1 processing unit 33d. Further, when the above determination result is OK, the HARQ processing unit 33c2 transmits the downlink user data input from the layer 1 processing unit 33d to the MAC-d processing unit 33d.

  As illustrated in FIG. 6, the radio base station NodeB according to the present embodiment includes an HWY interface 11, a baseband signal processing unit 12, a call control unit 13, one or a plurality of transmission / reception units 14, and one or A plurality of amplifier units 15 and one or a plurality of transmission / reception antennas 16 are provided.

  The HWY interface 11 is an interface with the radio network controller RNC. Specifically, the HWY interface 11 is configured to receive user data to be transmitted from the radio network controller RNC to the mobile station UE via the downlink and to input the user data to the baseband signal processing unit 12. . The HWY interface 11 is configured to receive control data for the radio base station NodeB from the radio network controller RNC and input it to the call controller 13.

  The HWY interface 11 is configured to acquire user data included in an uplink signal received from the mobile station UE via the uplink from the baseband signal processing unit 12 and transmit the user data to the radio network controller RNC. Has been. Further, the HWY interface 11 is configured to acquire control data for the radio network controller RNC from the call controller 13 and transmit it to the radio network controller RNC.

  The baseband signal processing unit 12 is configured to perform a MAC layer process and a layer 1 process on user data acquired from the HWY interface 11 to generate a baseband signal and transfer the baseband signal to the transmission / reception unit 14. .

  Here, the downlink MAC layer processing includes scheduling processing, transmission rate control processing, and the like. Further, the layer 1 processing in the downlink includes channel coding processing and spreading processing of user data.

  The baseband signal processing unit 12 is configured to perform MAC layer processing and layer 1 processing on the baseband signal acquired from the transmission / reception unit 14, extract user data, and transfer the user data to the HWY interface 11. ing.

  Here, the MAC layer processing in the uplink includes MAC control processing, header discard processing, and the like. Also, the layer 1 processing in the downlink includes despreading processing, RAKE combining processing, error correction decoding processing, and the like.

  A specific function of the baseband signal processing unit 12 will be described later. The call control unit 13 performs call control processing based on control data acquired from the HWY interface 11.

  The transmission / reception unit 14 is configured to perform a process of converting the baseband signal acquired from the baseband signal processing unit 12 into a radio frequency band signal (downlink signal) and transmit the signal to the amplifier unit 15. In addition, the transmission / reception unit 14 is configured to perform a process of converting a radio frequency band signal (uplink signal) acquired from the amplifier unit 15 into a baseband signal and transmit the signal to the baseband signal processing unit 12.

  The amplifier unit 15 is configured to amplify the downlink signal acquired from the transmission / reception unit 14 and transmit it to the mobile station UE via the transmission / reception antenna 16. The amplifier unit 15 is configured to amplify the uplink signal received by the transmission / reception antenna 16 and transmit the amplified uplink signal to the transmission / reception unit 14.

  As illustrated in FIG. 7, the baseband signal processing unit 12 includes an RLC processing unit 121, a MAC-d processing unit 122, and a MAC-e and layer 1 processing unit 123.

  The MAC-e and layer 1 processing unit 123 is configured to perform despreading processing, RAKE combining processing, HARQ processing, and the like on the baseband signal acquired from the transmission / reception unit 14.

  The MAC-d processing unit 122 is configured to perform header discard processing and the like on the output signals from the MAC-e and layer 1 processing unit 123.

  The RLC processing unit 121 is configured to perform retransmission control processing in the RLC layer, RLC-SDU reconstruction processing, and the like on the MAC-d processing unit 122.

  However, these functions are not clearly divided by hardware, and may be realized by software.

  As shown in FIG. 8, the MAC-e and layer 1 processing unit (uplink configuration) 123 includes a DPCCH RAKE unit 123a, a DPDCH RAKE unit 123b, an E-DPCCH RAKE unit 123c, and an E-DPDCH RAKE unit 123d. HS-DPCCH RAKE unit 123e, RACH processing unit 123f, TFCI decoder unit 123g, buffers 123h and 123m, re-despreading units 123i and 123n, FEC decoder units 123j and 123p, and E-DPCCH decoder unit 123k, a MAC-e function unit 123l, a HARQ buffer 123o, and a MAC-hs function unit 123q.

  The E-DPCCH RAKE unit 123c is included in the despreading process and the dedicated physical control channel (DPCCH) for the enhanced dedicated physical control channel (E-DPCCH) in the baseband signal transmitted from the transmitting / receiving unit 14. RAKE combining processing using existing pilot symbols is performed.

  The E-DPCCH decoder unit 123k performs a decoding process on the RAKE composite output of the E-DPCCH RAKE unit 123c to acquire a transmission format number, information about HARQ, information about scheduling, and the like, and a MAC-e function unit It is configured to input to 123l.

  The E-DPDCH RAKE unit 123d transmits the transmission format information (number of codes) transmitted from the MAC-e function unit 123l to the enhanced dedicated physical data channel (E-DPDCH) in the baseband signal transmitted from the transmission / reception unit 14. ) And RAKE combining processing using pilot symbols included in the dedicated physical control channel (DPCCH).

  The buffer 123m is configured to accumulate the RAKE combined output of the E-DPDCH RAKE unit 123d based on the transmission format information (number of symbols) transmitted from the MAC-e function unit 123l.

  Based on the transmission format information (spreading rate) transmitted from the MAC-e function unit 123l, the re-despreading unit 123n performs inverse processing on the RAKE combined output of the E-DPDCH RAKE unit 123d stored in the buffer 123m. It is configured to perform a diffusion process.

  The HARQ buffer 123o is configured to accumulate the despread processing output of the re-despreading unit 123n based on the transmission format information transmitted from the MAC-e function unit 123l.

  Based on the transmission format information (transmission data block size) transmitted from the MAC-e function unit 123l, the FEC decoder unit 123p outputs the despreading processing output of the re-despreading unit 123n accumulated in the HARQ buffer 123o. In addition, an error correction decoding process (FEC decoding process) is performed.

  The MAC-e function unit 123l transmits the transmission format information (number of codes, number of symbols, spreading factor, transmission data block size, etc.) based on the transmission format number acquired from the E-DPCCH decoder unit 123k, information on HARQ, information on scheduling, etc. ) Is calculated and output.

  As shown in FIG. 9, the MAC-e function unit 123l includes a reception processing command unit 123l1, a HARQ management unit 123l2, and a scheduling unit 123l3.

  The reception processing command unit 123l1 sends the transmission format number input from the E-DPCCH decoder unit 123k, information about HARQ, information about scheduling, user data and CRC results input from the FEC decoder unit 123p, to the HARQ management unit 123l2. Configured to send.

  Further, the reception processing command unit 123l1 is configured to transmit information related to scheduling input from the E-DPCCH decoder unit 123k to the scheduling unit 123l3.

  Further, the reception processing command unit 12311 is configured to output transmission format information corresponding to the transmission format number input from the E-DPCCH decoder unit 123k.

  The reception processing command unit 12311 is configured to manage the transmission data block size of user data in the mobile station UE connected to the radio base station NodeB.

  The reception processing command unit 12311 sets the speed holding timer T notified when the connection with the mobile station UE is established from the radio network controller RNC, the maximum transmission data block size during the effective period of the speed holding timer T, and the like. Based on this, the spreading code length (code length) and the number of spreading codes (number of codes) used in the despreading process are specified for the E-DPDCH RAKE unit 123d.

  Also, the reception processing command unit 123l1 commands the buffer 123 based on the transmission data block size in each mobile station UE, and secures a buffer of a required size.

  The HARQ management unit 123l2 determines whether the user data reception process is successful based on the CRC result input from the FEC decoder unit 123p. Then, the HARQ management unit 12312 generates a delivery confirmation signal (Ack or Nack) based on the determination result, and transmits it to the downlink configuration of the baseband signal processing unit 12. Further, when the above determination result is OK, the HARQ management unit 123l2 transmits the uplink user data input from the FEC decoder unit 123p to the radio network controller RNC.

  Further, the HARQ management unit 12312 clears the soft decision information stored in the HARQ buffer 123o when the above-described determination result is OK. On the other hand, when the above determination result is NG, the HARQ management unit 123l2 accumulates uplink user data in the HARQ buffer 123o.

  Also, the HARQ management unit 123l2 transfers the above-described determination result to the reception processing command unit 123l1, and the reception processing command unit 123l1 assigns hardware resources to be prepared for the next TTI based on the received determination result to E- Notify the DPDCH RAKE unit 123d and the buffer 123m.

  Also, the reception processing command unit 123l1 notifies the HARQ management unit 123l2 for securing the resources of the HARQ buffer 123o.

  Further, when there is user data stored in the buffer 123m for each TTI with respect to the buffer 123m and the FEC decoder unit 123p, the reception processing command unit 123l1 sets the TTI stored in the HARQ buffer 123o. The HARQ buffer 123o and the FEC decoder unit 123p are instructed to perform the FED decoding process after adding the uplink user data and the newly received uplink user data in the corresponding process.

  FIG. 10 shows a state where resources are secured in the HARQ buffer 123o. In this embodiment, as shown in FIG. 10, the HARQ buffer 123o secures resources of different sizes for each mobile station, and secures resources of the same size for each process. Here, the buffer address of each mobile station UE is managed by the HARQ management unit 12312.

  In addition, the scheduling unit 123l3, based on the radio resources in the uplink of the radio base station NodeB, the interference amount (noise rise) in the uplink, and the like (variables corresponding to the maximum allowable transmission rate) Instruct the downlink configuration of the baseband signal processing unit 12 to notify the scheduling signal including the transmission data block size and the maximum allowable transmission power ratio.

  In addition, the scheduling unit 123l3 notifies the HARQ management unit 123l2 of the scheduling signal. Also, the reception processing command unit 123l1 notifies the HARQ management unit 123l2 of the transmission format number and the like decoded by the E-DPCCH decoder unit 123k in preparation for the reception processing of user data in the next TTI.

  The radio network controller RNC according to the present embodiment is an apparatus positioned above the radio base station NodeB, and is configured to control radio communication between the radio base station NodeB and the mobile station UE.

  As shown in FIG. 11, the radio network controller RNC according to this embodiment includes an exchange interface 51, an LLC layer processing unit 52, a MAC layer processing unit 53, a media signal processing unit 54, and a base station interface 55. And a call control unit 56.

  The switching center interface 51 is an interface with the switching center 1. The switching center interface 51 is configured to transfer the downlink signal transmitted from the switching center 1 to the LLC layer processing unit 52 and to transfer the uplink signal transmitted from the LLC layer processing unit 52 to the switching center 1. Yes.

  The LLC layer processing unit 52 is configured to perform an LLC (Logical Link Control) sublayer process such as a header of a sequence number or a trailer combining process. The LLC layer processing unit 52 is configured to transmit the uplink signal to the switching center interface 51 and transmit the downlink signal to the MAC layer processing unit 53 after performing the LLC sublayer processing.

  The MAC layer processing unit 53 is configured to perform MAC processing such as priority control processing and header addition processing. After performing the MAC processing, the MAC layer processing unit 53 transmits the uplink signal to the LLC layer processing unit 52 and transmits the downlink signal to the base station interface 55 (or the media signal processing unit 54). It is configured.

  The media signal processing unit 54 is configured to perform media signal processing on audio signals and real-time image signals. The media signal processing unit 54 is configured to transmit the uplink signal to the MAC layer processing unit 53 and transmit the downlink signal to the base station interface 55 after performing the media signal processing.

  The base station interface 55 is an interface with the radio base station NodeB. The base station interface 55 transfers the uplink signal transmitted from the radio base station NodeB to the MAC layer processing unit 53 (or media signal processing unit 54), and the MAC layer processing unit 53 (or media signal processing unit 54). The downlink signal transmitted from is transmitted to the radio base station NodeB.

  The call control unit 56 is configured to perform call admission control processing, channel setting and release processing by layer 3 signaling, and the like.

  Further, the call control unit 56 sets the above-described speed holding timer T when the connection used for transmitting uplink user data is established between the mobile station UE and the radio base station NodeB. It is configured to notify the station UE and the radio base station NodeB.

(Operation of the mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 12, in the mobile communication system according to the first embodiment of the present invention, an operation in which the process #n in the mobile station UE transmits a data block with a predetermined TTI will be described.

  As shown in FIG. 12, in step S1001, the process #n determines whether or not it has received a Nack for the data block that it previously transmitted.

  If Nack is received, in step S1007, process #n performs retransmission processing for the data block related to the Nack.

  On the other hand, if Nack is not received, in step S1002, the process #n selects the first transmission data block size and the second transmission data block size.

  Specifically, the process #n receives a positive delivery confirmation request (Ack) that is a data block transmitted within a predetermined period (the effective period of the speed holding timer T) in the process #n. The maximum transmission data block size is selected as the first transmission data block size from the transmission data block sizes used in the data block. Then, the process #n increases the first transmission data block size according to a predetermined rule (for example, using the graph in FIG. 5).

  In addition, the process #n sets the maximum transmission data block size to the second transmission data block among the transmission data blocks used in the data block transmitted within a predetermined period (the effective period of the speed holding timer T). Select as size.

  In step S1003, the process #n compares the updated first transmission data block size with the second transmission data block size.

  When the updated first transmission data block size is greater than or equal to the second transmission data block size, in step S1004, the process #n determines that the updated first transmission data block size is the predetermined TTI. Is determined as the transmission data block size of the data block to be transmitted.

  On the other hand, when the updated first transmission data block size is smaller than the second transmission data block size, in step S1005, the process #n sets the second transmission data block size to the predetermined TTI. The transmission data block size of the data block to be transmitted is determined.

  In step S1006, the process #n transmits a data block within the determined transmission data block size within the predetermined TTI.

(Operations and effects of the mobile communication system according to the first embodiment of the present invention)
According to the mobile communication system according to the first embodiment of the present invention, stable transmission quality is ensured by controlling the transmission rate of user data based on the reception status of a positive acknowledgment signal (Ack). enable.

(Modification 1)
A mobile communication system according to a first modification of the present invention will be described with reference to FIGS. The mobile communication system according to the first modification is different from the mobile communication system according to the first embodiment except for the method for controlling the transmission rate of user data (the method for determining the transmission data block size) and the method for allocating resources in the HARQ buffer. It is the same as the communication system.

  With reference to FIG. 13, an example of a method for determining a transmission data block size by the E-TFC selection unit 33c1 in the present modification will be described. In the example of FIG. 13 as well, as in the case of FIG. 4, four process stop and wait is used.

  The transmission data block size determined at t = 1 to 9 in the example of FIG. 13 is the same as the transmission data block size determined at t = 1 to 9 of the example of FIG.

  At t = 10 (10 TTI), the process # 2 of the E-TFC selector 33c1 has reached the data block transmitted at t = 6 (6 TTI), so the data block transmitted at t = 6 Is selected as the first transmission data block size.

Thereafter, the E-TFC selection unit 33c1 increases the first transmission data block size from “S _initial ” to “S _initial + ΔS” with reference to the graph shown in FIG. 5 as a predetermined rule.

  In this modification, the E-TFC selection unit 33c1 is updated without selecting the second transmission data block (predetermined rule), unlike the E-TFC selection unit 33c1 according to the first embodiment described above. The first transmission data block size (incremented in step 1) is determined as the transmission data block size of the data block to be transmitted at t = 10.

  FIG. 14 shows a state in which resources are secured in the HARQ buffer 123o according to this modification.

  As shown in FIG. 14, in this modification, the HARQ buffer 123o secures resources of different sizes for each mobile station, and secures resources of different sizes for each process.

  With reference to FIG. 15, an operation in which the process #n in the mobile station UE transmits a data block with a predetermined TTI in the mobile communication system according to this modification will be described.

  As shown in FIG. 15, in step S2001, the process #n determines whether or not it has received a Nack for a data block that it previously transmitted.

  If the Nack is received, in step S2004, the process #n performs a retransmission process for the data block related to the Nack.

  On the other hand, if Nack has not been received, in step S2002, the process #n selects the first transmission data block size.

  Specifically, the process #n receives a positive delivery confirmation request (Ack) that is a data block transmitted within a predetermined period (the effective period of the speed holding timer T) in the process #n. The maximum transmission data block size is selected as the first transmission data block size from the transmission data block sizes used in the data block. Then, the process #n increases the first transmission data block size according to a predetermined rule (for example, using the graph in FIG. 5).

  Then, the process #n determines the updated first transmission data block size as the transmission data block size of the data block transmitted in the predetermined TTI.

  In step S2003, the process #n transmits a data block within the determined transmission data block size within the predetermined TTI.

  According to the mobile communication system according to this modification, in order to increase the transmission rate of user data for each process in which Ack arrives, in the radio base station NodeB configured to allocate radio communication resources for each process, Implementation can be simplified.

(Modification 2)
In addition, the mobile communication system according to the second modification of the present invention is configured so that the mobile station UE transmits to the radio base station NodeB instead of the transmission data block size used in the first embodiment and the first modification described above. The transmission power ratio between the data channel and the control channel related to the data block to be transmitted “(transmission power of enhanced dedicated physical data channel (E-DPDCH)) / (transmission power of enhanced dedicated physical control channel (E-DPCCH))” It is configured to be used.

  That is, the mobile station UE according to the present modification example is a data block that is transmitted to the radio base station NodeB within a predetermined period in a predetermined process and that has received a positive delivery confirmation request (Ack). The maximum transmission power ratio is selected as the first transmission power ratio from the transmission power ratio between the data channel and the control channel used in the block. Based on this, the transmission power ratio of the data block to be transmitted next to the radio base station NodeB in the predetermined process is determined.

  In addition, the mobile station UE according to the present modification increases the first transmission power ratio according to a predetermined rule (for example, using a graph as illustrated in FIG. 5), and then performs a radio base station in a predetermined process. You may be comprised so that the transmission power ratio of the data block transmitted with respect to station NodeB may be determined.

  Further, the mobile station UE according to the present modification selects the maximum transmission power ratio as the second transmission power ratio from the transmission power ratios used in the data blocks transmitted within the predetermined period described above. The transmission power ratio between the first transmission power ratio and the second transmission power ratio is determined as the transmission power ratio of the data block to be transmitted next to the radio base station NodeB in a predetermined process. It may be configured to.

  In addition, the mobile station UE according to the present modified example transmits a large transmission power ratio among the first transmission power ratio and the second transmission power ratio increased according to a predetermined rule to the radio base station NodeB next in a predetermined process. The transmission power ratio of the data block to be transmitted may be determined.

  Further, the mobile station UE according to the present modification increases the transmission power ratio of the data block to be transmitted next to the radio base station NodeB in a predetermined process until the maximum allowable transmission rate notified from the radio base station is reached. You may be comprised so that it may let me.

It is a functional block diagram of the mobile station of the mobile communication system which concerns on one Embodiment of this invention. It is a functional block diagram of the baseband signal processing part in the mobile station of the mobile communication system which concerns on one Embodiment of this invention. It is a functional block diagram of the MAC-e processing unit of the baseband signal processing unit in the mobile station of the mobile communication system according to one embodiment of the present invention. Method for determining data block to be transmitted next to radio base station by E-TFC selection unit of MAC-e processing unit of baseband signal processing unit in mobile station of mobile communication system according to one embodiment of the present invention It is a figure for demonstrating. Method for determining data block to be transmitted next to radio base station by E-TFC selection unit of MAC-e processing unit of baseband signal processing unit in mobile station of mobile communication system according to one embodiment of the present invention It is a figure for demonstrating. It is a functional block diagram of the radio base station of the mobile communication system which concerns on one Embodiment of this invention. FIG. 3 is a functional block diagram of a baseband signal processing unit in a radio base station of a mobile communication system according to an embodiment of the present invention. FIG. 4 is a functional block diagram of a MAC-e and a layer 1 processing unit (uplink configuration) in a baseband signal processing unit of a radio base station of a mobile communication system according to an embodiment of the present invention. It is a functional block diagram of MAC-e function part of MAC-e in a baseband signal processing part of the radio base station of the mobile communication system which concerns on one Embodiment of this invention, and a layer 1 process part (configuration for uplink). It is a figure which shows a mode that the MAC-e in the baseband signal processing part of the radio base station of the mobile communication system which concerns on one Embodiment of this invention, and the HARQ buffer of the layer 1 processing part (configuration for uplink) are ensured. . It is a functional block diagram of the radio network controller of the mobile communication system according to an embodiment of the present invention. 5 is a flowchart showing an operation of the mobile communication system according to the embodiment of the present invention. Method for determining data block to be transmitted next to radio base station by E-TFC selection unit of MAC-e processing unit of baseband signal processing unit in mobile station of mobile communication system according to Modification 1 of the present invention It is a figure for demonstrating. It is a figure which shows a mode that the MAC-e in the baseband signal processing part of the radio | wireless base station of the mobile communication system which concerns on the modification 1 of this invention, and the HARQ buffer of the layer 1 process part (uplink structure) are ensured. . It is a flowchart which shows operation | movement of the mobile communication system which concerns on the modification 1 of this invention. 1 is an overall configuration diagram of a general mobile communication system. It is a figure for demonstrating the operation | movement at the time of transmitting bursty data in the conventional mobile communication system. It is a figure for demonstrating the stop and weight in the conventional mobile communication system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Switching office, NodeB ... Wireless base station, 11 ... HWY interface, 12, 33 ... Baseband signal processing part, 121, 33a ... RLC processing part, 122, 33b ... MAC-d processing part, 123 ... MAC-e and Layer 1 processing unit, 123a ... DPCCH RAKE unit, 123b ... DPDCH RAKE unit, 123c ... E-DPCCH RAKE unit, 123d ... E-DPDCH RAKE unit, 123e ... HS-DPCCH RAKE unit, 123f ... RACH processing unit, 123g ... TFCI Decoder unit, 123h, 123m, buffer, 123i, 123n, re-spreading unit, 123j, 123p, FEC decoder unit, 123k, E-DPCCH decoder unit, 123l, MAC-e function unit, 123l1, reception processing command unit, 123l2 ... HARQ management unit, 123l3 ... Juring unit, 123o ... HAQR buffer, 123q ... MAC-hs function unit, 13, 56 ... call control unit, 14 ... transmission / reception unit, 15 ... amplifier unit, 16, 35 ... transmission / reception antenna, UE ... mobile station, 31 ... bus Interface, 32 ... Call processing unit, 34 ... RF unit, 33c ... MAC-e processing unit, 33c1 ... E-TFCI selection unit, 33c2 ... HARQ processing unit, 33d ... Layer 1 processing unit, RNC ... Radio network control station, 51 ... switching station interface, 52 ... LLC layer processing unit, 53 ... MAC layer processing unit, 54 ... media signal processing unit, 55 ... base station interface

Claims (18)

In a mobile communication system adopting N process stop and weight, a transmission rate control method for controlling a transmission rate of user data transmitted in units of data blocks,
The maximum transmission data block size is selected from among the transmission data block sizes used in the data block that is transmitted within a predetermined period in the predetermined process and that has received a positive delivery confirmation request. Selecting a transmission data block size of 1;
And determining a transmission data block size of a data block to be transmitted next in the predetermined process based on the first transmission data block size.   2. The transmission rate control method according to claim 1, wherein in the determining step, the transmission data block size is determined by increasing the first transmission data block size according to a predetermined rule. Selecting a maximum transmission data block size as a second transmission data block size from among the transmission data block sizes used in the data blocks transmitted within the predetermined period,
2. The determination according to claim 1, wherein, in the determining step, a larger transmission data block size is determined as the transmission data block size among the first transmission data block size and the second transmission data block size. Transmission speed control method.   In the determining step, a larger transmission data block size among the first transmission data block size and the second transmission data block size increased by a predetermined rule is determined as the transmission data block size. The transmission rate control method according to claim 3. In a mobile communication system adopting N process stop and weight, a transmission rate control method for controlling a transmission rate of user data transmitted in units of data blocks,
The maximum transmission power ratio among the transmission power ratios between the data channel and the control channel related to the data block transmitted within the predetermined period in the predetermined process and having received the positive acknowledgment request Selecting as the first transmission power ratio;
And determining a transmission power ratio of a data block to be transmitted next in the predetermined process based on the first transmission power ratio.   6. The transmission rate control method according to claim 5, wherein, in the determining step, the transmission power ratio is determined by increasing the first transmission power ratio according to a predetermined rule. Selecting the maximum transmission power ratio as the second transmission power ratio from the transmission power ratios used in the data blocks transmitted within the predetermined period,
6. The transmission rate control method according to claim 5, wherein, in the determining step, a larger transmission power ratio among the first transmission power ratio and the second transmission power ratio is determined as the transmission power ratio. .   8. The step of determining, wherein a larger transmission power ratio among the first transmission power ratio and the second transmission power ratio increased by a predetermined rule is determined as the transmission power ratio. The transmission rate control method described in 1. In a mobile communication system employing N process stop and weight, a mobile station that controls a transmission rate of user data transmitted in units of data blocks to a radio base station,
A data block transmitted to the radio base station within a predetermined period in a predetermined process, and a maximum transmission data block size used in a data block used for receiving a positive acknowledgment request. A selection unit for selecting a transmission data block size as a first transmission data block size;
A mobile station comprising: a determining unit that determines a transmission data block size of a data block to be transmitted next to the radio base station in the predetermined process based on the first transmission data block size; .   The mobile station according to claim 9, wherein the determination unit is configured to determine the transmission data block size by increasing the first transmission data block size according to a predetermined rule. . The selection unit is configured to select a maximum transmission data block size as a second transmission data block size from among transmission data block sizes used in data blocks transmitted within the predetermined period. And
The determination unit is configured to determine, as the transmission data block size, a larger transmission data block size among the first transmission data block size and the second transmission data block size. Item 10. The mobile station according to Item 9.   The determination unit is configured to determine, as the transmission data block size, a larger transmission data block size among the first transmission data block size and the second transmission data block size increased according to a predetermined rule. The mobile station according to claim 11, wherein:   The movement according to claim 9, wherein the determination unit is configured to increase the transmission data block size until a maximum allowable transmission rate notified from the radio base station is reached. Bureau. In a mobile communication system employing N process stop and weight, a mobile station that controls a transmission rate of user data transmitted in units of data blocks to a radio base station,
A transmission power ratio between a data channel and a control channel used in a data block transmitted to the radio base station within a predetermined period in a predetermined process and having received a positive delivery confirmation request A selection unit that selects the maximum transmission power ratio as the first transmission power ratio from
A mobile station, comprising: a determination unit that determines a transmission power ratio of a data block to be transmitted next to the radio base station in the predetermined process based on the first transmission power ratio.   The mobile station according to claim 14, wherein the determination unit is configured to determine the transmission power ratio by increasing the first transmission power ratio according to a predetermined rule. The selection unit is configured to select a maximum transmission power ratio as a second transmission power ratio from transmission power ratios used in data blocks transmitted within the predetermined period,
The said determination part is comprised so that large transmission power ratio may be determined as said transmission power ratio among said 1st transmission power ratio and said 2nd transmission power ratio. Mobile stations.   The determination unit is configured to determine, as the transmission power ratio, a larger transmission power ratio among the first transmission power ratio and the second transmission power ratio increased according to a predetermined rule. The mobile station according to claim 16. The mobile station according to claim 14, wherein the determination unit is configured to increase the transmission power ratio until a maximum allowable transmission rate notified from the radio base station is reached. .

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