JP2006254428A - Method of controlling transmission rate, and mobile station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To compensate QoS in each logic channel by not conforming to a "Down" instruction included in a relative rate control channel if the transmission rate of uplink user data is lower than a guaranteed bit rate (GBR). <P>SOLUTION: A method of controlling a transmission rate has a step in which a radio circuit control station notifies a mobile station of the guaranteed bit rate in the logic channel, and a step in which the mobile station controls the transmission rate of uplink user data without conforming to an instruction of the relative rate control channel transmitted from a cell to which the mobile station is connected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transmission rate control method and mobile station for controlling the transmission rate of uplink user data transmitted via a logical channel by a mobile 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)”.

  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, Up / Down / Hold three values) ).

  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.

  Although there is a load of downlink control signal and a load of transmission rate control by the radio base station NodeB, user data transmission rate (or user data transmission) such as “Time & Rate Control” and “Rate Control per UE” Controlling the speed and transmission time individually can be a good control method for improving the channel capacity in the uplink.

  As shown in FIG. 12, the “Rate Control per UE” controls the transmission rate of user data using an absolute rate control channel (AGCH) and a relative rate control channel (RGCH). By using many relative speed control channels (RGCH), it is possible to simplify the control signal to be transmitted in order to control the transmission rate of user data. This can reduce the impact.

  For example, as described in Non-Patent Document 1, the detailed behavior of transmission rate control using a relative rate control channel (RGCH) including three values of Up / Down / Hold is described in the previous hybrid ARQ process. A method of instructing increase / decrease / hold from the transmission speed is common.

  In addition, in each cell, when interference power from a mobile station (non-serving mobile station) that uses another cell as a serving cell increases, an instruction (in order to reduce the transmission rate of user data transmitted by the non-serving cell mobile station) Relative rate control channel (RGCH) including Down) is transmitted.

  The relative speed control channel (RGCH) is different from the relative speed control channel (RGCH) transmitted by the serving cell set, and takes a binary value of “Down / Don't care”.

  As described in Non-Patent Document 2, when the mobile station UE is communicating with a serving cell and one or more non-serving cells, when the mobile station UE receives at least one “Down” instruction, the “Down” instruction The transmission rate of user data is controlled with priority given to.

  As described above, in uplink enhancement, the uplink user data transmission rate of each mobile station UE is dynamically changed at high speed depending on the degree of interference in the radio link, the processing resources of the radio base station NodeB, and the like. Is possible.

  However, quality of service information (QoS: Quality of Service) is set for each logical channel.

  For example, in the case of a logical channel used for voice communication, it may be a low speed of several kbps to several tens of kbps, but it is necessary for the other party to receive the signal without causing a delay.

In addition, a certain level of transmission speed is required in a logical channel used for image communication or the like. Such a transmission rate may be expressed as a “compensated transmission rate (GBR)”.
3GPP TSG RAN R2-050229 3GPP TSG RAN TS25.309 V.6.1.0

  However, when the mobile station UE that is transmitting user data using a logical channel for which a compensated transmission rate (GBR) is set controls the transmission rate of user data according to the received “Down” instruction, In some cases, the data transmission rate falls below the compensated transmission rate (GBR) of the logical channel.

  Therefore, the present invention has been made in view of the above points. When the transmission rate of the uplink user data falls below the compensation transmission rate (GBR), the “Down” instruction included in the relative rate control channel is used. It is an object of the present invention to provide a transmission rate control method and a mobile station that can compensate QoS in each logical channel by not complying with the above.

  A first feature of the present invention is a transmission rate control method for controlling a transmission rate of uplink user data transmitted via a logical channel by a mobile station, wherein the radio network controller Notifying the compensated transmission rate in the logical channel; and when the mobile station receives a relative rate control channel transmitted from a cell to which the mobile station is connected, transmitted via the logical channel Comparing the transmission rate of uplink user data with the compensated transmission rate in the logical channel, and when the mobile station has the transmission rate of the uplink user data equal to or less than the compensated transmission rate, an indication by the relative rate control channel And the step of controlling the transmission rate of the uplink user data without following the above.

  A second feature of the present invention is a mobile station that transmits uplink user data via a logical channel, the service quality information receiving unit that receives a compensated transmission rate in the logical channel from a radio network controller, and When a relative speed control channel transmitted from a cell to which the mobile station is connected is received, a transmission rate of uplink user data transmitted through the logical channel is compared with a compensated transmission rate in the logical channel. A comparison unit, and a transmission rate control unit that controls the transmission rate of the uplink user data without following the instruction by the relative rate control channel when the transmission rate of the uplink user data is equal to or less than the compensation transmission rate. This is the gist.

  A third feature of the present invention is a transmission rate control method for controlling the transmission rate of uplink user data transmitted via a logical channel by a mobile station, wherein the radio network controller Notifying the compensated transmission rate in the logical channel, and controlling the transmission rate of the uplink user data without the mobile station following the instruction by the relative rate control channel transmitted from the cell to which the mobile station is connected. And a step of performing.

  In the third aspect of the present invention, in the step of controlling the transmission rate of the uplink user data, when the transmission rate of the uplink user data is lower than the compensation transmission rate, the mobile station uses the relative rate control channel. The transmission rate of the uplink user data may be controlled without following the instruction.

  In the third aspect of the present invention, when the mobile station receives the relative speed control channel, the mobile station may further include a step of comparing the transmission rate of the uplink user data with the compensation transmission rate.

  A fourth feature of the present invention is a mobile station that transmits uplink user data via a logical channel, and is configured to receive a compensated transmission rate in the logical channel from a radio network controller. An information receiving unit, and a transmission rate control unit configured to control the transmission rate of the uplink user data without following an instruction by a relative rate control channel transmitted from a cell to which the mobile station is connected. The gist is to provide.

  In the fourth feature of the present invention, when the transmission rate control unit transmits the uplink user data without following the instruction by the relative rate control channel when the transmission rate of the uplink user data is lower than the compensated transmission rate. It may be configured to control the speed.

  In the fourth aspect of the present invention, the apparatus may further comprise a comparison unit configured to compare the transmission rate of the uplink user data and the compensated transmission rate when the relative rate control channel is received. Good.

  As described above, according to the present invention, when the transmission rate of uplink user data falls below the compensated transmission rate (GBR), by not following the “Down” instruction included in the relative rate control channel, It is possible to provide a transmission rate control method and a mobile station capable of compensating for QoS in each logical channel.

(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.

  The mobile communication system according to the present embodiment is configured to automatically increase the transmission rate of user data transmitted via the uplink by the mobile station UE to the maximum allowable transmission rate.

  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 composed of an enhanced dedicated physical data channel and an enhanced dedicated physical control channel, a dedicated physical data channel (DPDCH), and a dedicated physical control channel (DPCCH). Channel) is used as an individual physical channel.

  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.

  Here, the scheduling signal is a maximum allowable transmission rate of user data (for example, a maximum allowable transmission data block size or an enhanced dedicated physical data channel (E-DPDCH) transmitted in the mobile station UE transmitted by the absolute rate control channel (AGCH). ) And the dedicated physical control channel (DPCCH) transmission power ratio (maximum value (maximum allowable transmission power ratio), etc.), parameters related to the maximum allowable transmission rate, and relative speed control channel (RGCH). And a relative value for instructing to change the maximum allowable transmission rate.

  In this specification, unless otherwise specified, the maximum allowable transmission rate includes a parameter relating to the maximum allowable transmission rate.

  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 the E-TFC selection unit 33c1 receives a new absolute rate control channel (AGCH), the E-TFC selection unit 33c1 prioritizes the absolute value of the maximum allowable transmission rate included in the absolute rate control channel (AGCH) and determines transmission format information. To do.

  The E-TFC selector 33c1 is configured to receive a compensated transmission rate (GBR) in each logical channel from the radio network controller RNC.

  Here, the E-TFC selection unit 33c1 is transmitted from the serving cell or the non-serving cell to which the mobile station UE is connected based on the compensated transmission rate (GBR) in each logical channel notified from the radio network controller RNC. In addition, it is configured to determine whether or not to control the transmission rate of the uplink user data according to an instruction by the relative rate control channel (RGCH).

  Specifically, the E-TFC selection unit 33c1 is transmitted via a logical channel when receiving a relative rate control channel (RGCH) transmitted from a serving cell or a non-serving cell to which the mobile station UE is connected. When the uplink user data transmission rate is equal to or less than the compensation transmission rate (GBR), the relative speed control channel (RGCH) instruction ( The transmission rate of the uplink user data is controlled without following the “Down” instruction).

  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, a MAC-hs function unit 123q, and an interference power measurement unit 123r.

  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 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, 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.

  In addition, the scheduling unit 123l3 can determine the maximum allowable transmission rate (maximum allowable transmission data block size or maximum allowable transmission power ratio based on uplink radio resources of the radio base station NodeB, interference amount (noise rise) in the uplink, and the like. Etc.) is instructed to the downlink configuration of the baseband signal processing unit 12 so as to notify the scheduling signal.

  Specifically, the scheduling unit 123l3 determines the maximum allowable transmission rate based on the scheduling-related information (radio resource in the uplink) transmitted from the E-DPCCH decoder unit 123k, and user data in the mobile station in communication The transmission rate is controlled.

  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.

  The call control unit 56 sets and notifies the compensated transmission rate (GBR) in each logical channel to the mobile station UE.

(Operation of the mobile communication system according to the first embodiment of the present invention)
With reference to FIG. 9, the operation of the mobile communication system according to the first embodiment of the present invention will be described.

  As shown in FIG. 9, in step S1001, the mobile station UE determines whether or not it has received a relative rate control channel transmitted from a non-serving cell or a serving cell to which the mobile station UE is connected.

  If received, in step S1002, the mobile station UE compares the transmission rate of the uplink user data transmitted via the logical channel with the compensated transmission rate (GBR) in the logical channel notified from the radio network controller RNC. Then, it is determined whether the transmission rate of the uplink user data is equal to or less than the compensation transmission rate (GBR).

  If the transmission rate of the uplink user data is not equal to or less than the compensated transmission rate (GBR), the mobile station UE decreases the transmission rate of the uplink user data according to the “Down” instruction included in the relative rate control channel in step S1003. .

  On the other hand, when the transmission rate of the uplink user data is not equal to or less than the compensated transmission rate (GBR), the mobile station UE transmits uplink user data without following the “Down” instruction included in the relative rate control channel in step S1004. Maintain or increase speed.

  In another embodiment, the mobile station UE proceeds directly to step S1004 after step S1001.

  In step S1004, the mobile station UE ignores the received relative speed control channel (RGCH) and does not follow the “Down” instruction included in the received relative speed control channel (RGCH) (for example, compensated transmission). The transmission rate of the uplink user data is controlled according to the rate (GBR).

  Also, the mobile station UE may proceed to step S1004 without performing the comparison in step S1002.

  In such a case, for example, when the transmission rate of the uplink user data is lower than the compensation transmission rate (GBR) based on an instruction from the outside, the mobile station UE performs Step S1004.

(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, when the transmission rate of uplink user data falls below the compensated transmission rate (GBR), the “Down” instruction included in the relative rate control channel is displayed. By not complying, QoS in each logical channel can be compensated.

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. 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 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. 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 an example of the channel transmitted by the wireless base station of 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 (6)

A transmission rate control method for controlling a transmission rate of uplink user data transmitted via a logical channel by a mobile station,
A step in which a radio network controller notifies the mobile station of a compensated transmission rate in the logical channel;
Transmission rate control comprising: a step of controlling the transmission rate of the uplink user data without the mobile station following an instruction by a relative rate control channel transmitted from a cell to which the mobile station is connected. Method.   In the step of controlling the transmission rate of the uplink user data, when the transmission rate of the uplink user data is lower than the compensated transmission rate, the mobile station does not follow the instruction by the relative rate control channel, and the uplink user data The transmission rate control method according to claim 1, wherein the transmission rate is controlled.   The transmission rate control method according to claim 2, further comprising a step of comparing the transmission rate of the uplink user data with the compensated transmission rate when the mobile station receives the relative rate control channel. . A mobile station that transmits uplink user data via a logical channel,
A quality of service information receiver configured to receive a compensated transmission rate in the logical channel from a radio network controller;
A transmission rate control unit configured to control the transmission rate of the uplink user data without following the instruction by the relative rate control channel transmitted from the cell to which the mobile station is connected. Mobile station.   The transmission rate control unit is configured to control the transmission rate of the uplink user data without following the instruction by the relative rate control channel when the transmission rate of the uplink user data is lower than the compensated transmission rate. The mobile station according to claim 4, wherein: The comparison unit according to claim 4, further comprising a comparison unit configured to compare a transmission rate of the uplink user data with the compensated transmission rate when the relative rate control channel is received. Mobile station.