JP2006311454A - Transmission rate control method, user equipment, and radio base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve smooth data transmission by transmitting data without decreasing a transmission rate even if transmission data are again generated. <P>SOLUTION: This transmission rate control method includes steps of; a serving cell transmitting a first relative rate grant channel including a command for controlling a transmission rate in an uplink to the user equipment UE; a non-serving cell transmitting a second relative rate grant channel including a command for controlling a transmission rate in the uplink to the user equipment UE; and the user equipment UE controlling the transmission rate according to the command included in the first relative rate grant channel not in compliance with the command included in the second relative rate grant channel. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transmission rate control method for controlling a transmission rate in an uplink, a mobile station, and a radio base station.

  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. 10, the radio network controller RNC normally controls a number of radio base stations NodeB in an integrated manner. Therefore, in a 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. 11 (a), when performing bursty data transmission, as shown in FIG. 11 (b), low speed, high delay and low transmission efficiency are allowed. As shown in FIG. 11 (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. 11, 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)”.

  As shown in FIG. 12, in uplink enhancement, a “down” command (command for instructing to lower the uplink transmission rate) is sent to the relative transmission rate control channel (RGCH) received from the non-serving cell. ) Is included, the uplink transmission rate used in the most recent transmission time interval (TTI) (strictly speaking, the enhanced dedicated physical data channel (E-DPDCH) and the dedicated physical control channel (DPCCH)) The predetermined transmission value is subtracted from the transmission power ratio) to determine the uplink transmission rate at that time (see Non-Patent Document 1).

On the other hand, when there is no more data to be transmitted in the transmission buffer of the mobile station UE, the radio base station NodeB transmits “DTX” on the relative transmission rate control channel (RGCH) (that is, transmits nothing). Thus, the uplink transmission rate in the mobile station UE can be maintained.
3GPP TSG-RAN TS25.309 v6.2.0

  However, in the conventional uplink enhancement, when data is not transmitted in the most recent transmission time interval (TTI), an uplink command is sent from the non-serving cell by the “Down” command included in the relative rate control channel (RGCH). The transmission speed is “0 kbps”.

  As a result, even if the data is temporarily interrupted and data transmission is started immediately, it is necessary to start from the procedure of requesting the uplink transmission rate to the radio base station NodeB, and the temporary transmission delay There was a problem of being connected to.

  Therefore, the present invention has been made in view of the above points, and even when transmission data is generated again, a transmission rate capable of realizing smooth data transmission by transmitting data without reducing the transmission rate. It is an object to provide a control method, a mobile station, and a radio base station.

  A first feature of the present invention is a transmission rate control method, wherein a serving cell transmits a first relative rate control channel including a command for controlling a transmission rate in an uplink to a mobile station. A non-serving cell transmitting a second relative rate control channel including a command for controlling a transmission rate in an uplink to the mobile station; and the mobile station should transmit in a transmission buffer. And the step of controlling the transmission speed according to the command included in the first relative speed control channel without following the command included in the second relative speed control channel.

  As described above, according to the present invention, even when transmission data is generated again, a transmission rate control method, a mobile station, which can realize smooth data transmission by transmitting data without reducing the transmission rate And a radio base station can be provided.

(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, “HSDPA” is used in the downlink, and “EUL (uplink enhancement)” is used in the uplink. In “HSDPA” and “EUL”, retransmission control by HARQ (N process stop and wait) is performed.

  Therefore, in the uplink, an enhanced dedicated physical channel (E-DPCH) composed of an enhanced dedicated physical data channel (E-DPDCH) and an enhanced dedicated physical control channel (E-DPCCH), and a dedicated physical data channel (DPDCH: Dedicated) A dedicated physical channel (DPCH) composed of a physical data channel (DPCCH) and a dedicated physical control channel (DPCCH) 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: Channel Quality Indicator) and a high-speed dedicated physical data channel acknowledgment signal (Ack or Nack).

  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 35.

  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 perform processing (RLC processing) in the upper layer of layer 2 on the user data transmitted from the call processing unit 32 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.

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

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

  When there is no more data to be transmitted in the transmission buffer, the E-TFC selection unit 33c1 includes a command ("Don't care" command or "" included in the second relative rate control channel (RGCH) transmitted from the non-serving cell. Without following the “Down” command), according to the command (eg, “Down” command, “Up” command or “Hold” command) included in the first relative rate control channel (RGCH) transmitted from the serving cell. It is configured to control the 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 shown in FIG. 4, 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 performs RLC processing, MAC processing (MAC-d processing or MAC-e processing) and layer 1 processing on user data acquired from the HWY interface 11 to generate a baseband signal. The data is transmitted to the transmission / reception unit 14.

  Here, downlink MAC processing includes HARQ processing, 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 extracts user data by performing layer 1 processing, MAC processing (MAC-e processing or MAC-d processing), and RLC processing on the baseband signal acquired from the transmission / reception unit 14. Then, it is configured to transfer to the HWY interface 11.

  Here, the MAC processing in the uplink includes HARQ processing, scheduling processing, transmission rate control processing, header discard processing, and the like. Further, the layer 1 processing in the uplink 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 shown in FIG. 5, 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, error correction decoding 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 output signal from 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. 6, 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, acquires a transmission format number, information on HARQ, information on scheduling, and the like to the MAC-e function unit 123l. Configured to input.

  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 composite 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, HARQ information, scheduling information, etc. acquired from the E-DPCCH decoder unit 123k. Etc.) is calculated and output.

  Further, as shown in FIG. 7, the MAC-e functional 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 is configured to transmit the transmission format number, the information related to HARQ, and the information related to scheduling input from the E-DPCCH decoder unit 123k to the HARQ management unit 123l2.

  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 HARQ management unit 123l2 determines whether or not the reception process of the uplink user data 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 the E-DPDCH. Notification is made to the RAKE unit 123d and the buffer 123m, and notification for securing resources in the HARQ buffer 123o is performed.

  In addition, when there is uplink 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 stores the TTI stored in the HARQ buffer 123o. The HARQ buffer 123o and the FEC decoder unit 123p are instructed to perform the FEC decoding process after adding the uplink user data and the newly received uplink user data in the process corresponding to.

  The scheduling unit 123l3 is configured to transmit a scheduling signal (absolute rate control channel (AGCH) or relative rate control channel (RGCH)) via the downlink configuration.

  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. 8, the radio network controller RNC according to the present 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 layer processing such as priority control processing and header addition processing. After performing the MAC layer processing, the MAC layer processing unit 53 transmits an uplink signal to the LLC layer processing unit 52 and transmits a downlink signal to the base station interface 55 (or the media signal processing unit 54). It is configured as follows.

  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 radio resource management processing, channel setting and release processing by layer 3 signaling, and the like. Here, the radio resource management includes call admission control, handover control, and the like.

  With reference to FIG. 9, the operation of the mobile station UE in the mobile communication system according to the first embodiment of the present invention will be described.

  As shown in FIG. 9, the mobile station UE starts soft handover in step S101, and determines in step S102 whether or not data has been transmitted in the most recent transmission time interval (TTI).

  When data is transmitted in the most recent transmission time interval (TTI) (that is, when there is no data to be transmitted in the transmission buffer), in step S103, the mobile station UE transmits the relative speed transmitted from the non-serving cell. The uplink transmission rate is controlled according to a command included in the control channel (RGCH) and a command included in the relative rate control channel (RGCH) transmitted from the serving cell.

  On the other hand, when data is not transmitted in the most recent transmission time interval (TTI) (that is, when there is no data to be transmitted in the transmission buffer), in step S104, the mobile station UE is transmitted from a non-serving cell. The uplink transmission rate is controlled according to the command included in the relative rate control channel (RGCH) transmitted from the serving cell without following the command included in the relative rate control channel (RGCH).

FIG. 3 is a functional block diagram of a mobile station of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a functional block diagram of a baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a functional block diagram of a MAC-e processing unit of a baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a functional block diagram of a radio base station of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a functional block diagram of a baseband signal processing unit in the radio base station of the mobile communication system according to the first embodiment of the present invention. FIG. 3 is a functional block diagram of a MAC-e and a layer 1 processing unit (uplink configuration) in the baseband signal processing unit of the radio base station of the mobile communication system according to the first embodiment of the present invention. 4 is a functional block diagram of a MAC-e functional unit of a MAC-e and a layer 1 processing unit (uplink configuration) in the baseband signal processing unit of the radio base station of the mobile communication system according to the first embodiment of the present invention. FIG. . FIG. 3 is a functional block diagram of a radio network controller of the mobile communication system according to the first embodiment of the present invention. 3 is a flowchart showing an operation of the mobile communication system according to the first embodiment of the present 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 which shows the transmission rate control channel transmitted 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 (3)

A serving cell transmitting to the mobile station a first relative rate control channel including a command for controlling a transmission rate in the uplink;
A non-serving cell transmitting a second relative rate control channel including a command for controlling a transmission rate in an uplink to the mobile station;
When there is no more data to be transmitted in the transmission buffer, the mobile station controls the transmission speed according to the command included in the first relative speed control channel without following the command included in the second relative speed control channel. A transmission rate control method comprising the steps of:   A mobile station for realizing the transmission rate control method according to claim 1. A radio base station for realizing the transmission rate control method according to claim 1.

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