JP4192956B2 - CDMA radio base station apparatus and encoding / decoding processing method - Google Patents

Description

  The present invention relates to a radio base station apparatus and a coding / decoding processing method used in a CDMA (Code Division Multiple Access) type mobile communication system, and more particularly, more packet switching type calls (hereinafter referred to as PS calls). The present invention also relates to a CDMA radio base station apparatus and a coding / decoding processing method thereof that enable best-effort resource allocation that can accommodate such data.

  The allocation of resources that can be accommodated in the UpLink in a radio base station (CDMA radio base station) of a CDMA communication system may be determined based on the processing capability of the baseband signal processing unit. In this resource allocation determination, a method is adopted in which an upper limit value is determined using the number of accommodated users (UE), that is, the number of calls, and the transmission band in terms of voice users for the corresponding user as main parameters.

  For example, Patent Document 1 includes a plurality of baseband signal processing units, and monitors the load state of each baseband signal processing unit, because a high load is instantaneously applied to the baseband signal processing unit. However, a radio base station apparatus that distributes the load based on the monitoring result is introduced.

Japanese Patent Laid-Open No. 2004-120070 3GPP TS 25.309 v6.5.0 (3rd Generation Partnership Project: Technical Specification Group; FDD enhanced uplink; Overall description; Stage 2) 3GPP TS 25.309 v6.5.0 (3rd Generation Partnership Project: Technical Specification Group; FDD enhanced uplink; 3GPP TS 25.212 v 6.7.0 (3rd Generation Partnership Project: Technical Specification Group Radio Access Network) (Multiplexing and channel coding) (D

  By the way, since the demand for PS call service has increased in recent years, it is desired for the CDMA base station apparatus to increase the number of PS call accommodating users. However, the above-described conventional resource allocation method has a problem that required resources are counted at a fixed rate in consideration of the maximum possible transmission rate. However, if the service used as before is a condition where there are many circuit switching type calls (hereinafter also referred to as CS calls), resources can be used effectively even with such a conventional resource allocation method. Will be.

  However, in a situation where there are many PS calls, communication is not always performed at the maximum transmission rate, and the amount of transmission data varies depending on the user and the transmission time is not the same. Will occur and will not be used effectively.

  The above situation applies not only to UpLink of a CDMA communication system but also to DownLink. For example, in DownLink, the transmission rate is always fixed in a radio space, but the transmission rate of a transfer channel (hereinafter referred to as TrCH) transmitted from a radio network controller (RNC) to a radio base station is variable. In a service such as a PS call that does not always take the maximum transmission rate, there is a resource vacancy.

  FIG. 10 is a diagram illustrating UpLink resource allocation (upper stage) and processing load (lower stage) in a conventional CDMA radio base station. The upper limit of the processing capacity is indicated by the lower arrow in FIG. 10 and it is determined that there is no available resource, but there are some resources available in the portion allocated to the PS call. .

  FIG. 11 is a diagram illustrating functional blocks of a CDMA receiving unit of a CDMA radio base station in which a resource vacancy as described above occurs. In this configuration, the processing load cannot be controlled in accordance with the transmission rate of the received baseband signal. Therefore, the processing capacity of the entire baseband signal processing unit itself can be improved, or the number of accommodated users of the call can be increased. I understand that I can't.

  In short, in a CDMA communication system, it is necessary to handle CS calls that need to be continuously communicated and PS calls that cause resource vacancies as described above. In particular, as described above, it is considered that there is room for effectively utilizing the vacant resources allocated to the PS call.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a CDMA base station apparatus capable of increasing the number of accommodated users even on the premise of existing processing capability. And an encoding / decoding processing method.

  According to a first aspect of the present invention, a decoding processing control unit that receives a baseband signal and call setting information, a transfer channel decoding processing unit that outputs signal data decoded for each transfer channel, and each of the transfer channels Control information from the physical channel decoding processing unit that transmits the separated signal data to the decoding processing unit, the pseudo transfer channel decoding processing unit that generates dummy data in place of the transfer channel decoding processing unit, and the decoding processing control unit A baseband capable of increasing the number of PS calls accommodated in a radio base station apparatus used in a CDMA (Code Division Multiple Access) type mobile communication system, A decryption processing method is provided. According to this method, first, the decoding process control unit calculates a load accumulation value per unit time for a decoding process of a transfer channel based on the baseband signal and call setting information. When the accumulated load value per unit time exceeds a first threshold and the transfer channel to be decoded is a PS call channel, the decoding process control unit performs the pseudo transfer channel decoding process. The first control information is transmitted to the transfer channel decoding process selection unit so as to select a unit. Then, the transfer channel decoding process selection unit operates the pseudo transfer channel decoding process unit based on the first control information, and omits the decoding process for the transfer channel. It is possible to accommodate more calls within a range that does not exceed the processing load upper limit that is appropriately determined while suppressing the load by using the pseudo transfer channel decoding processing unit.

  Further, according to the second aspect of the present invention, the code processing control unit that receives the call setting information and the transfer channel information from the frame receiving unit that receives the frame from the base station control device, and the code for each transfer channel A transfer channel code processing unit that outputs converted signal data, a physical channel code processing unit that transmits a baseband signal using signal data received from each of the transfer channel code processing units, and a transfer channel code processing unit. And a transfer channel code processing selection unit that operates based on control information from the code processing control unit, and is used in a CDMA mobile communication system. There is provided a baseband encoding processing method capable of increasing the number of PS calls accommodated in a radio base station apparatus. According to this method, first, the code processing control unit calculates a load accumulation value per unit time for code processing of a transfer channel based on the call setting information and transfer channel information. When the load accumulated value per unit time exceeds a first threshold and the transfer channel to be code-processed is a packet-switched call, the code processing control unit is configured to transmit the pseudo transfer channel code processing unit. 1st control information is transmitted to the said transfer channel code process selection part so that it may select. Then, the transfer channel code processing selection unit operates the pseudo transfer channel code processing unit based on the first control information, and omits the encoding process for the transfer channel. In this case as well, it is possible to accommodate more calls within a range that does not exceed the upper limit of the processing load that is appropriately determined while suppressing the load by using the pseudo transfer channel code processing unit.

  Moreover, according to the 3rd viewpoint of this invention, the CDMA radio base station apparatus for implementing the said baseband decoding processing method and a baseband encoding process is provided.

  According to the present invention, it is possible to manage more resources based on the resources that can be allocated based on the actual processing load and accommodate more calls.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of a first embodiment in which the present invention is applied to a received baseband signal decoding processing system of a W-CDMA radio base station. Referring to FIG. 1, a decoding processing system of a W-CDMA radio base station includes a decoding processing control unit 1 that controls the entire decoding processing system, and PhCH decoding that performs a decoding process on a physical channel (hereinafter abbreviated as PhCH). From the processing unit 3, the pseudo PhCH decoding processing unit 4, the TrCH decoding processing unit 9 that performs decoding processing of a transfer channel (hereinafter abbreviated as TrCH), the pseudo TrCH decoding processing unit 10, and the Iub processing unit 15 It is configured.

  The PhCH decoding processing unit 3 includes a PhCH decoding processing selection unit 2, a RAKE data reception unit 5, a 2nd deinterleaver unit 6, and a TrCH separation unit 7. The PhCH decoding process selection unit 2 is a unit to which data of a DPDCH (Dedicated Physical Data Channel) that carries a data signal among received baseband signals is input, and a PhCH decoding control signal (second signal) from the decoding process control unit 1 In accordance with the control signal), it is selected whether to perform decoding processing using each processing means below the RAKE data receiving unit 5 or to create dummy data using the pseudo PhCH decoding processing unit 4.

  The RAKE data receiving unit 5 is means for taking RAKE data, the 2nd deinterleaver unit 6 is means for performing secondary deinterleaving processing on the received RAKE data, and the TrCH demultiplexing unit 7 is PhCH Is a means for separating the data of a plurality of TrCHs mapped to each and transmitting them to the TrCH decoding processing unit 9. The details of each of these processes are well known to those skilled in the art and are not directly related to the present invention, so detailed description thereof will be omitted.

  The pseudo PhCH decoding processing unit 4 generates, for all TrCHs mapped to PhCH, data before generation of dummy Iub frames, that is, dummy data equivalent to the output of the TrCH decoding processing unit 9, and the Iub processing unit 15 It is a means to output to. The CPU resources required for generating dummy data in the pseudo PhCH decoding processing unit 4 are very small compared to the CPU resources required for processing in each component of the PhCH decoding processing unit 3.

  The TrCH decoding processing unit 9 includes a TrCH decoding processing selection unit 8, a rate dematching unit 11, a 1st deinterleaver unit 12, a Viterbi decoding / turbo decoding unit 13, and a TrBk separation unit 14. The TrCH decoding process selection unit 8 performs each process after the rate dematching unit 11 on the PhCH data received from the TrCH separation unit 7 according to the TrCH decoding control signal (first control signal) from the decoding process control unit 1. It is selected whether to perform a decoding process using the means or to create dummy data using the pseudo TrCH decoding processing unit 10.

  The rate dematching unit 11 is a unit that performs rate dematching processing that matches the PhCH transmission rate and the TrCH transmission rate, and the first deinterleaver unit 12 is a unit that performs primary deinterleaving processing. is there. The Viterbi decoding / turbo decoding unit 13 is means for performing Viterbi decoding or turbo decoding on the data subjected to the primary deinterleaving process. The TrBk separation unit 14 transfers the decoded data to a transfer block (Transport Block; TrBk). Abbreviated to each data) and CRC check and CRC bit removal. The details of each of these processes are well known to those skilled in the art and are not directly related to the present invention, so detailed description thereof will be omitted.

  The pseudo TrCH decoding processing unit 10 generates data before generating a dummy Iub frame, that is, dummy data equivalent to the output of the TrCH decoding processing unit 9, for the TrCH specified by the decoding processing control unit 1, and performs Iub processing. It is means for outputting to the unit 15. The CPU resources required for generating dummy data in the pseudo TrCH decoding processing unit 10 are very small compared to the CPU resources required for processing in each component of the TrCH decoding processing unit 9.

  The Iub processing unit 15 includes an Iub Frame generation unit 16, and based on input data from the pseudo PhCH decoding processing unit 4, the TrCH decoding processing unit 9, and the pseudo TrCH decoding processing unit 10, a radio base station apparatus (Node- It is possible to generate a frame of Iub that is an interface between B) and a radio network controller (RNC). Since this processing is also well known to those skilled in the art and is not directly related to the present invention, a detailed description thereof will be omitted.

  Subsequently, the operation of the present embodiment will be described with reference to the drawings as appropriate. First, among the DPCCH (Dedicated Physical Control Channel) that carries control information of the received baseband signal, a TFCI (Transport Format Combination Indicator) necessary for calculating the transmission rate of the PhCH and the parameters of the TrCH mapped to the PhCH, and Is input to the decoding processing control unit 1.

  FIG. 2 is a flowchart showing an algorithm for determining a PhCH decoding control signal, which is performed every predetermined time in the decoding processing control unit 1. The threshold A used here is a parameter set according to the baseband decoding processing capability per unit time, and the required estimated CPU usage rate cumulative value to be compared with the threshold A is determined by the decoding processing control unit 1. Cleared for each unit time period, and indicates the accumulated value of the required estimated CPU usage rate of the PhCH decoding process executed per unit time.

  Referring to FIG. 2, the decoding process control unit 1 determines whether the PhCH decoding process of the corresponding call is a process for the first radio frame (Radio Frame) in the maximum TTI among all TrCHs mapped to the PhCH. It is determined whether or not (step S101). This determination is due to the fact that the TrCH decoding process described later handles data for each TTI, so the type of PhCH decoding process (PhCH decoding process / pseudo PhCH decoding process) for each radio frame in the TTI must be matched. It is. In the present embodiment, this determination is performed on the first frame in the TTI.

  As a result of step S101, when the PhCH decoding process of the corresponding call is a process for the first frame within the maximum TTI, the decoding process control unit 1 calculates the required estimated CPU usage rate when the decoding process of the corresponding PhCH is performed. Calculate (step S102). Focusing on the fact that the processing load of the PhCH decoding process is almost uniquely determined by the PhCH transmission rate, this required estimated CPU usage rate is determined in advance for each PhCH transmission rate and stored in an internal table or the like. In addition, it is possible to calculate the required estimated CPU usage rate by a simple method by comparing this table with the actual transmission rate. The required estimated CPU usage rate calculated here is a value obtained by multiplying the value per radio frame by the number of frames within the maximum TTI since the types of PhCH decoding processing are combined within the maximum TTI as described above. The PhCH transmission rate can be calculated from, for example, information (call setting information) obtained at the time of call setup and TFCI obtained from an actual received signal.

  Subsequently, the decoding process control unit 1 adds the required estimated CPU usage rate of the corresponding PhCH calculated in step S102 to the current estimated CPU usage rate cumulative value (temporary cumulative value) as a threshold A (second It is determined whether or not the threshold value is exceeded (step S103). Here, if the provisional cumulative value of the required estimated CPU usage rate does not exceed the threshold A, the decoding process control unit 1 determines the PhCH process control information of the maximum TTI frame (the PhCH process control information of the maximum TTI frame is In step S109, PhCH decoding processing is set (step S104). This is used to determine whether or not the estimated CPU usage rate cumulative value for the non-first frame needs to be updated. Further, the decoding process control unit 1 updates the current estimated CPU usage rate cumulative value by adding the required estimated CPU usage rate of the corresponding PhCH calculated in step S102 (step S105). And the decoding process control part 1 sets a PhCH decoding process as PhCH decoding control information given with respect to the PhCH decoding process selection part 2 (step S106).

  On the other hand, when it is determined in step S103 that the temporary cumulative value of the required estimated CPU usage rate exceeds the threshold A, the decoding process control unit 1 determines the PhCH process control information of the maximum TTI frame (this maximum TTI frame). The PhCH process control information is used to determine whether or not the estimated CPU usage rate cumulative value for the non-first frame needs to be updated in step S109.) The pseudo PhCH decoding process is set (step S107). Further, the decoding process control unit 1 sets a pseudo PhCH decoding process as the PhCH decoding control information to be given to the PhCH decoding process selection unit 2 (step S108).

  On the other hand, if it is determined in step S101 that the PhCH decoding process for the corresponding call is not a process for the first frame within the maximum TTI, the decoding process control unit 1 determines that the frame within the maximum TTI set in steps S104 and S107. The PhCH processing control information is referred to (step S109). Here, if the PhCH decoding control information is set as the PhCH processing control information of the frame within the maximum TTI, the decoding processing control unit 1 similarly to step S102, the required estimated CPU usage rate when the decoding processing of the corresponding PhCH is performed. Is calculated (step S110). Furthermore, the decoding process control unit 1 updates the current estimated CPU usage rate cumulative value by adding the required estimated CPU usage rate of the corresponding PhCH calculated in step S110 (step S105), and determines that it is the first frame Similarly, the PhCH decoding process is set as the PhCH decoding control information to be given to the PhCH decoding process selection unit 2 (step S106).

  On the other hand, when the pseudo-CHCH decoding process is set as the PhCH process control information of the frame within the maximum TTI in step S109, the decoding process control unit 1 performs the PhCH decoding process in the same manner as when determining that it is the first frame. A pseudo PhCH decoding process is set as the PhCH decoding control information to be given to the selection unit 2 (step S108).

  When the decoding process control unit 1 transmits PhCH decoding control information for selecting the pseudo PhCH decoding process to the PhCH decoding process selection unit 2, data is passed to the pseudo PhCH decoding processing unit 4, and in the pseudo PhCH decoding processing unit 4, Dummy data that can generate a dummy Iub frame is generated and output.

  On the other hand, when the decoding process control unit 1 transmits PhCH decoding control information for selecting the PhCH decoding process to the PhCH decoding process selection unit 2, the RAKE data reception unit 5, the 2nd deinterleaver unit 6, and the TrCH separation unit 7 are transmitted. Then, when the PhCH data for each TTI that is the handling unit of data in the TrCH decoding process is prepared, the data is input to the TrCH decoding process selection unit 8.

  FIG. 3 is a flowchart showing an algorithm for determining a TrCH decoding control signal in the decoding processing control unit 1. The threshold B used here is a parameter set according to the baseband decoding processing capability per unit time, and is set to a value smaller than the threshold A. The required estimated CPU usage rate cumulative value to be compared with the threshold value B is the same parameter as the required estimated CPU usage rate cumulative value that is updated when the above PhCH decoding process is selected. It is cleared for each time period, and indicates the accumulated value of the required estimated CPU usage rate of the PhCH decoding process and TrCH decoding process executed per unit time.

  Referring to FIG. 3, first, the decoding process control unit 1 calculates a required estimated CPU usage rate when the TrCH decoding process is performed on the corresponding TrCH (step S201). Note that the processing load of the TrCH decoding process is almost uniquely determined by the size of the transfer block (TrBk), the number of transfer blocks (TrBk), the error correction code type (convolutional code / turbo code), and the encoding rate parameter. The required estimated CPU usage rate is determined in advance by determining the required estimated CPU usage rate according to the combination of these parameters and holding it in an internal table or the like, and the combination of this table and each parameter of the TrCH actually processed Can be calculated by a simple method for obtaining the required estimated CPU usage rate.

  Subsequently, the decoding process control unit 1 determines whether or not the corresponding TrCH is a TrCH to be controlled by the TrCH decoding process (step S202). Here, the TrCH to be controlled is a TrCH for providing a PS service. The decoding process control unit 1 determines whether or not the service is a PS service based on the transfer block (TrBk) size and the number of transfer blocks (TrBk) in the TF (Transport Format) information obtained from the call setting information and the reception TFCI. can do.

  In step S202, when the TrCH to be determined is a channel of a CS call, the decoding process control unit 1 skips the threshold determination in step S203 and performs the current estimation CPU use because the decoding process is performed with priority. The required cumulative CPU usage rate of the corresponding TrCH calculated in step S201 is added to the cumulative rate value and updated (step S204), and the TrCH decoding process is set as TrCH decoding control information to be given to the TrCH decoding process selection unit 8 (Step S205).

  On the other hand, when the TrCH to be determined is a PS call channel in step S202, the decoding process control unit 1 uses the required estimated CPU usage of the corresponding TrCH calculated in step S201 to the current estimated CPU usage rate cumulative value. It is determined whether or not the value (temporary cumulative value) to which the rate is added exceeds a threshold value B (first threshold value) (step S203).

  If the provisional accumulated value of the required estimated CPU usage rate is equal to or less than the threshold value B in step S203, the decoding process control unit 1 sets the required TrCH requirement calculated in step S201 to the current estimated CPU usage accumulated value. The estimated CPU usage rate is added and updated (step S204). And the decoding process control part 1 sets a TrCH decoding process as TrCH decoding control information given with respect to the TrCH decoding process selection part 8 (step S205).

  On the other hand, when the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold value B in step S203, the decoding process control unit 1 performs the pseudo TrCH decoding process as TrCH decoding control information to be given to the TrCH decoding process selection unit 8. Setting is made (step S206).

  When the decoding process control unit 1 transmits TrCH decoding control information for selecting the pseudo TrCH decoding process to the TrCH decoding process selection unit 8, data is passed to the pseudo TrCH decoding processing unit 10, and in the pseudo TrCH decoding processing unit 10, Dummy data is generated and output for the corresponding TrCH.

  On the other hand, when the decoding process control unit 1 transmits TrCH decoding control information for selecting the TrCH decoding process to the TrCH decoding process selection unit 8, the rate dematching unit 11, the first deinterleaver unit 12, the Viterbi decoding / turbo decoding unit 13, data is input to the Iub processing unit 15 via the TrBk separation unit 14.

  In the Iub processing unit 15, a frame of the Iub interface is generated by the Iub Frame generation unit 16 based on input data from the pseudo PhCH decoding processing unit 4, the TrCH decoding processing unit 9, and the pseudo TrCH decoding processing unit 10.

  As described above, because the processing load in the baseband decoding process is allocated by calculating the required estimated CPU usage rate for each of the PhCH decoding process and the TrCH decoding process and calculating the cumulative value. Thus, more calls such as PS calls that do not always have the maximum transmission rate can be accommodated as compared with the resource allocation method at the time of the conventional fixed transmission rate conversion. FIG. 4 is a diagram showing UpLink resource allocation (upper stage) and processing load (lower stage) in the CDMA radio base station according to the present embodiment. As is clear from comparison with FIG. 9, even if the upper limit of the processing capability is estimated as in the conventional case, resources are used without waste.

  Next, a second embodiment of the present invention that considers the response to the decoding process of E-DCH (Enhanced DCH), which is considered to be introduced in 3.5th generation mobile communication, will be described.

  Since the contents of the encoding / decoding process differ between DCH and E-DCH, the method described in the first embodiment cannot be employed as it is. In particular, in the case of E-DCH, a plurality of TrCHs (DCCH: Dedicated Control Channel and DTCH: Dedicated Traffic Channel) are not multiplexed on one PhCH as in DCH. Control that divides PhCH decoding processing and TrCH decoding processing into whether or not only a specific TrCH is subject to decoding processing only makes the processing complicated and has no merit.

  Furthermore, in the decoding process of E-DCH, the prioritization of decoding at the time of SHO (soft handover) should be considered. The radio base station apparatus (Node-B) receives E-DCH from users of Serving RL (radio link in service) and users of Non-serving RL (radio link not in service) (Non-patent Document 1). reference). When there is a margin in the resources of the decoding processing unit, all E-DCH decoding processing should be performed regardless of Serving / Non-serving. However, when the resources become insufficient, Serving RL (in service) It is better to preferentially decode the E-DCH of the user of the wireless link.

  Of course, when there is no more available resource, it is necessary to control not to perform all E-DCH decoding processes regardless of Serving / Non-serving.

  FIG. 5 is a block diagram of the second embodiment of the present invention in which a series of decoding process control is performed for the E-DCH by combining the PhCH decoding process and the TrCH decoding process in consideration of the above-described matters. . The difference in configuration from the first embodiment is that an E-DCH decoding processing selection unit 40, an E-DCH decoding processing unit 41, and a pseudo E-DCH decoding processing unit 42 are added. Hereinafter, the different parts will be sequentially described.

  The E-DCH decoding processing unit 41 includes an E-DCH decoding processing selection unit 40, a RAKE data receiving unit 43, a deinterleaver & PhCH multiplexing unit 44, a rate dematching / HARQ functionality unit 45, a turbo decoding unit 46, , A CRC deletion unit 47. The E-DCH decoding process selection unit 40 is means for receiving E-DPDCH (Enhanced Dedicated Physical Data Channel) data that carries a data signal among the received baseband signals, and the E-DCH from the decoding process control unit 1 Depending on the decoding control signal (the third control signal and the fourth control signal), the decoding processing using each processing means after the RAKE data receiving unit 43 is performed, or the pseudo E-DCH decoding processing unit 42 is used. Select whether to create dummy data.

  The RAKE data receiving unit 43 is a means for collecting RAKE data. The deinterleaver & PhCH multiplexing unit 44 transmits these data when E-DCH data is transmitted using a deinterleaving process and a plurality of PhCHs. This is a means for performing a multiplexed PhCH multiplexing process. The rate dematching / HARQ functionality unit 45 is a means for performing rate dematching processing and HARQ functionality processing. The turbo decoding unit 46 is a unit that performs a turbo decoding process, and the CRC deletion unit 47 is a unit that checks and removes the CRC added to the TrBk. The details of each of these processes are well known to those skilled in the art and are not directly related to the present invention, so detailed description thereof is omitted (see Non-Patent Document 2).

  The pseudo E-DCH decoding processing unit 42 is a unit that generates data before generating a dummy Iub frame, that is, dummy data equivalent to the output of the E-DCH decoding processing unit 41 and outputs the dummy data to the Iub processing unit 15. . The CPU resource required for generating dummy data in the pseudo E-DCH decoding processing unit 42 is very small compared to the CPU resource required for the processing in each component of the E-DCH decoding processing unit 41.

  The Iub processing unit 15 includes an Iub Frame generation unit 16, and includes a pseudo PhCH decoding processing unit 4, a TrCH decoding processing unit 9, a pseudo TrCH decoding processing unit 10, an E-DCH decoding processing unit 41, and a pseudo E-DCH decoding process. Based on the input data from the unit 42, it is possible to generate an Iub frame that is an interface between the radio base station apparatus (Node-B) and the radio control apparatus (RNC).

  Next, the operation of this embodiment will be described with reference to the drawings. First, among the DPCCH (Dedicated Physical Control Channel) that carries control information of the received baseband signal, a TFCI (Transport Format Combination Indicator) necessary for calculating the transmission rate of the PhCH and the parameters of the TrCH mapped to the PhCH, and Is input to the decoding processing control unit 1. Also for the E-DPCCH, E-TFCI (Transport Format Combination Indicator) information necessary for calculating the E-DCH transmission rate and TF (Transport Format) information is input to the decoding processing control unit 1. .

  FIG. 6 is a flowchart showing an algorithm for determining an E-DCH decoding control signal (third control signal, fourth control signal) executed at predetermined time intervals in the decoding processing control unit 1. The threshold C and threshold D (here, threshold C <threshold D) used here are parameters set according to the baseband decoding processing capability per unit time, and are to be compared with the threshold C and threshold D. The required estimated CPU usage rate cumulative value is cleared for each unit time period in the decoding process control unit 1 and indicates the cumulative value of the required estimated CPU usage rate of the E-DCH decoding process executed per unit time.

  Referring to FIG. 6, first, the decoding process control unit 1 calculates a required estimated CPU usage rate when the E-DCH decoding process is performed on the corresponding E-DCH (step S501). Focusing on the fact that the processing load of the E-DCH decoding process is almost uniquely determined by the TrBk size parameter, the required estimated CPU usage rate corresponding to this parameter is determined in advance and stored internally as a table. It can be calculated by a simple method for obtaining the required estimated CPU usage rate by checking the combination of E-DCH parameters that are actually processed.

  Subsequently, the decoding processing control unit 1 adds a value (temporary cumulative value) obtained by adding the required estimated CPU usage rate of the corresponding E-DCH calculated in step S501 to the current estimated CPU usage rate cumulative value, and a threshold value C (first value). 4 threshold) and threshold D (third threshold) are compared (step S502).

  In step S502, if the provisional cumulative value of the required estimated CPU usage rate is equal to or less than the threshold value C (fourth threshold value), that is, if there is a sufficient processing load, whether or not the corresponding E-DCH is a priority processing target. Without determining whether or not, the process proceeds to step S504.

  On the other hand, if the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold value C (fourth threshold value) in step S502 but is less than or equal to the threshold value D (third threshold value), that is, the processing load has less margin. In the case where it is determined, the decoding process control unit 1 determines whether or not the corresponding E-DCH is the E-DCH subject to priority processing (step S503). Here, if the corresponding E-DCH is the E-DCH of the Serving RL, it is determined that it is the priority processing target E-DCH, and if it is the Non-Serving RL E-DCH, it is determined not to be the priority processing target E-DCH. It shall be.

  When it is determined in step S503 that the E-DCH is the priority processing target, the decoding process control unit 1 is the same as the case where the provisional cumulative value of the required estimated CPU usage rate is equal to or less than the threshold C (fourth threshold). The process proceeds to step S504.

  Subsequently, the decoding process control unit 1 updates the current estimated CPU usage rate cumulative value by adding the required estimated CPU usage rate of the corresponding E-DCH calculated in step S501 (step S504). And the decoding process control part 1 sets an E-DCH decoding process as E-DCH decoding control information given with respect to the E-DCH decoding process selection part 40 (step S505).

  When the decoding process control unit 1 transmits E-DCH decoding control information for selecting the E-DCH decoding process to the E-DCH decoding process selection unit 40 in this way, the RAKE data receiving unit 43, deinterleaver & PhCH multiplexing The data is input to the Iub processing unit 15 via the unit 44, the rate dematching / HARQ functionality unit 45, the turbo decoding unit 46, and the CRC deletion unit 47.

  In the Iub processing unit 15, the Iub Frame generation unit 16 performs processing from the pseudo PhCH decoding processing unit 4, TrCH decoding processing unit 9, pseudo TrCH decoding processing unit 10, E-DCH decoding processing unit 41, and pseudo E-DCH decoding processing unit 42. Iub interface frames are generated based on the input data.

  On the other hand, when it is determined in step S503 that the E-DCH is not the priority processing target, the decoding process control unit 1 uses pseudo E-DCH as E-DCH decoding control information to be given to the E-DCH decoding process selection unit 40. A decoding process is set (step S506).

  Also, in step S502, when the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold value D (third threshold value), that is, when there is not enough processing load, the decoding process control unit 1 determines that the priority processing target The pseudo E-DCH decoding process is set as E-DCH decoding control information to be given to the E-DCH decoding process selection unit 40 without determining whether or not it is E-DCH (step S506).

  Then, when the decoding process control unit 1 transmits E-DCH decoding control information for selecting the pseudo E-DCH decoding process to the E-DCH decoding process selection unit 40, the data is transferred to the pseudo E-DCH decoding processing unit 42. Then, the dummy E-DCH decoding processing unit 42 generates and outputs dummy data for the corresponding E-DCH.

  As described above, when the processing load of E-DCH also increases, first, the increase in processing load is suppressed by omitting the decoding process of E-DCH that is not the priority processing target in step S503, and still Thus, stepwise control is realized in which all E-DCH decoding processes are omitted when the processing load is large.

  As described above, in this embodiment, the processing load in the baseband decoding process is calculated, the required estimated CPU usage rate is calculated for each of the PhCH decoding process and the TrCH decoding process for DCH, and the cumulative value is calculated. In addition, for E-DCH, the cumulative value is calculated by calculating the required estimated CPU usage rate for decoding processing by combining PhCH and TrCH, and by combining these, the estimated CPU usage rate of the decoding processing unit is calculated and managed. Yes.

  As a result, with regard to the DCH, calls that do not always have the maximum transmission rate, such as PS calls, can be accommodated more than the resource allocation method at the time of fixed transmission rate conversion. As for DCH, best effort type resource management is realized so that the load on the decoding processing unit does not fail while incorporating decoding priority control.

  Next, a third embodiment in which the present invention is applied to a baseband signal encoding processing system of a W-CDMA radio base station will be described. FIG. 7 is a block diagram showing the configuration of the third exemplary embodiment of the present invention. Referring to FIG. 7, the coding processing system of the W-CDMA radio base station includes a coding processing control unit 20 that controls the entire coding processing system, an Iub processing unit 21, and a TrCH coding process that performs coding processing of TrCH. 23, a pseudo TrCH code processing unit 31, a PhCH code processing unit 32 that performs PhCH code processing, and a pseudo PhCH code processing unit 39.

  The Iub processing unit 21 includes an IubFrame reception unit 22 that can transmit the Iub Frame received from the host to the code processing control unit 20 and the TrCH code processing unit 23.

  The TrCH code processing unit 23 includes a TrCH code processing selection unit 24, a CRC addition / TrBk combination unit 25, a convolution / turbo coding unit 26, a rate matching unit 27, a 1st DTX insertion unit 28, a 1st interleaver unit 29, and a radio frame division unit. 30. The TrCH code processing selection unit 24 uses the CRC addition / TrBk combination unit 25 and the following for the data received from the IubFrame reception unit 22 according to the TrCH code control signal (first control signal) from the code processing control unit 20. It is selected whether to perform code processing using the processing means or to create dummy data using the pseudo TrCH code processing unit 31.

  The CRC addition / TrBk combiner 25 is a means for adding CRC for BLER confirmation to transmission data and combining it with data for each transfer block. The convolution / turbo encoder 26 is a convolutional code / turbo encoding process. It is a means to perform. The rate matching unit 27 is a means for performing rate matching processing for matching transmission rates, and the 1st DTX insertion unit 28 inserts DTX (Discontinuous Transmission) indication bits based on the result of the rate matching processing. Means. The 1st interleaver unit 29 is a unit that performs primary interleaving processing, and the radio frame division unit 30 is a unit that performs radio frame segmentation processing and outputs TrCH. The details of each of these processes are well known to those skilled in the art and are not directly related to the present invention, so detailed description thereof will be omitted.

  The pseudo TrCH code processing unit 31 is a unit that generates dummy data equivalent to the output of the TrCH code processing unit 23 for the TrCH designated by the code processing control unit 20 and outputs the dummy data to the PhCH code processing unit 32. The CPU resources required for generating dummy data in the pseudo TrCH code processing unit 31 are very small compared to the CPU resources required for processing in each component of the TrCH code processing unit 23.

  The PhCH code processing unit 32 includes a PhCH code processing selection unit 33, a TrCH multiplexing unit 34, a 2nd DTX insertion unit 35, a PhCH division unit 36, a 2nd interleaver unit 37, and a PhCH data transmission unit 38. The PhCH code processing selection unit 33 performs TrCH multiplexing on the data received from the TrCH code processing unit 23 and the pseudo TrCH code processing unit 31 according to the PhCH code control signal (second control signal) from the code processing control unit 20. It is selected whether or not to perform code processing using each processing means after the unit 34 or to create dummy data using the pseudo PhCH code processing unit 39.

  The TrCH multiplexing unit 34 is a unit that multiplexes data of a plurality of TrCHs, and the 2nd DTX insertion unit 35 is a unit that performs secondary DTX indication bits insertion processing. The PhCH division unit 36 is a unit that performs segmentation processing so that it can be mapped to a physical channel, the 2nd interleaver unit 37 is a unit that performs secondary interleaving processing, and the PhCH data transmission unit 38 is interleaved It is means for mapping data to a physical channel and transmitting it. The details of each processing are well known to those skilled in the art and are not directly related to the present invention, so that detailed description thereof is omitted.

  Next, the operation of this embodiment will be described with reference to the drawings. FIG. 8 is a flowchart showing an algorithm for determining a TrCH code control signal that is executed at predetermined time intervals in the code processing control unit 20. The threshold A and threshold B used here are parameters set according to the baseband code processing capability per unit time, and are set so that threshold A> threshold B. Further, the required estimated CPU usage rate cumulative value which is a comparison target with the threshold A and the threshold B is cleared at every cycle of the unit time in the code processing control unit 20, and the required estimation CPU of the PhCH code processing executed per unit time. It shows the cumulative value of usage rate.

  Referring to FIG. 8, the code processing control unit 20 calculates a required estimated CPU usage rate when TrCH code processing is performed on the corresponding TrCH (step S301). The processing load of the TrCH code process can be calculated by a simple method similar to that of the first embodiment described above.

  Subsequently, the code processing control unit 20 adds a value (temporary cumulative value) obtained by adding the required estimated CPU usage rate of the corresponding TrCH calculated in step S301 to the current estimated CPU usage rate cumulative value to a threshold B (first value). It is determined whether or not the threshold value is exceeded (step S302).

  In step S302, when the provisional cumulative value of the required estimated CPU usage rate is equal to or less than the threshold value B, the code processing control unit 20 sets the required TrCH calculated in step S301 to the current estimated CPU usage cumulative value. The estimated CPU usage rate is added and updated (step S303). Then, the code processing control unit 20 sets TrCH code processing as TrCH code control information to be given to the TrCH code processing selection unit 24 (step S304).

  On the other hand, when the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold value B in step S302, the code processing control unit 20 further adds the current estimated CPU usage rate cumulative value of the corresponding TrCH calculated in step S301. It is determined whether or not the value obtained by adding the required estimated CPU usage rate (temporary cumulative value) exceeds a threshold A (second threshold) (step S305).

  If the provisional cumulative value of the required estimated CPU usage rate is equal to or less than the threshold value A in step S305, the code processing control unit 20 determines whether the corresponding TrCH is a TrCH subject to control of TrCH code processing (step S306). ). The TrCH to be controlled here is a TrCH for providing a PS service as in the first embodiment.

  In step S306, when the TrCH to be determined is a CS call channel, the code processing control unit 20 performs the current estimation as in the case where the provisional cumulative value of the required estimated CPU usage rate is equal to or less than the threshold value B. The CPU usage rate cumulative value is updated by adding the required estimated CPU usage rate of the corresponding TrCH calculated in step S301 (step S303), and TrCH code processing is performed as TrCH code control information to be given to the TrCH code processing selection unit 24. Setting is made (step S304).

  On the other hand, in step S305, if the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold A, and if the TrCH to be determined is a PS call channel in step S306, the code processing control is performed. The unit 20 sets the pseudo TrCH code process as TrCH code control information to be given to the TrCH code process selection unit 24 without updating the estimated CPU usage rate cumulative value (step S307).

  When the code processing control unit 20 transmits TrCH code control information for selecting pseudo TrCH code processing to the TrCH code processing selection unit 24, data is passed to the pseudo TrCH code processing unit 31, and in the pseudo TrCH code processing unit 31, Dummy TrCH data is generated and output.

  On the other hand, when the code processing control unit 20 transmits TrCH code control information for selecting TrCH code processing to the TrCH code processing selection unit 24, the TrCH code processing selection unit 24, the CRC addition / TrBk combination unit 25, the convolution / turbo code TrCH data is input to the PhCH code processing selection unit 33 via the conversion unit 26, the rate matching unit 27, the 1st DTX insertion unit 28, the 1st interleaver unit 29, and the radio frame division unit 30.

  FIG. 9 is a flowchart showing an algorithm for determining a PhCH code control signal, which is performed every predetermined time in the code processing control unit 20. As the threshold A used here, the same value as the value used for the comparison with the required estimated CPU usage rate accumulated value in the TrCH code process can be used.

  Referring to FIG. 9, the code processing control unit 20 calculates a required estimated CPU usage rate when the code processing of the corresponding PhCH is performed (step S401). The processing load of PhCH code processing can be calculated by a simple method similar to that of the first embodiment described above.

  Subsequently, the code processing control unit 20 determines whether or not the value (temporary cumulative value) obtained by adding the required estimated CPU usage rate of the corresponding PhCH calculated in step S401 to the current estimated CPU usage rate cumulative value exceeds the threshold A. Is determined (step S402). Here, when the temporary accumulated value of the required estimated CPU usage rate is equal to or less than the threshold A, the code processing control unit 20 sets the required estimation of the corresponding PhCH calculated in step S401 to the current estimated CPU usage accumulated value. The CPU usage rate is added and updated (step S403), and the PhCH code process is set as the PhCH code control information to be given to the PhCH code process selection unit 33 (step S404).

  On the other hand, when it is determined in step S402 that the provisional cumulative value of the required estimated CPU usage rate exceeds the threshold A, the code processing control unit 20 provides the PhCH code control information to the PhCH code processing selection unit 33. Pseudo PhCH code processing is set (step S405).

  Thus, when the code processing control unit 20 transmits the PhCH code control information for selecting the pseudo PhCH code processing to the PhCH code processing selection unit 33, the data is passed to the pseudo PhCH code processing unit 39, and the pseudo PhCH code processing is performed. The unit 39 generates and outputs dummy PhCH data corresponding to the output data of the PhCH code processing unit.

  On the other hand, when the code processing control unit 20 transmits PhCH code control information for selecting PhCH code processing to the PhCH code processing selection unit 33, a TrCH multiplexing unit 34, a 2nd DTX insertion unit 35, a PhCH division unit 36, and a 2nd interleaver unit 37, PhCH is output via the PhCH data transmission unit 38.

  In DownLink of the W-CDMA communication system of the present embodiment, transmission of TrCH transmitted from the radio network controller (RNC) to the radio base station apparatus (Node-B) is always a fixed transmission rate in the radio space. The rate is variable for each TTI, and the TrCH transmission rate may be lower than the PhCH transmission rate in a service that does not always take the maximum transmission rate, such as a PS call. In such a case, in the baseband encoding processing system, the rate is matched by inserting the DTX instruction bit as described above. However, it is possible to reduce the processing load at the stage before the insertion of the DTX instruction bit. Become.

  As described above, also in this embodiment, the processing load in the baseband code process is calculated by calculating the required estimated CPU usage rate for each of the PhCH code process and the TrCH code process and calculating the accumulated value. Since allocation is performed, more calls such as PS calls that do not always have the maximum transmission rate can be accommodated as compared to the conventional resource allocation method at the time of fixed transmission rate conversion.

  Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above-described embodiments, and resources are managed by load accumulation values per unit time for decoding / coding processing. Needless to say, various modifications and substitutions can be made without departing from the gist of the present invention in which the decoding / encoding process is omitted depending on the load situation. For example, in the above-described embodiment, it has been described that the accumulated value of the CPU usage rate is used. However, other load parameters may be employed.

It is a block diagram showing the structure of the 1st Embodiment of this invention. It is a flowchart for demonstrating the operation | movement of the 1st Embodiment of this invention. It is a flowchart for demonstrating the operation | movement of the 1st Embodiment of this invention. It is a figure for demonstrating the effect of the 1st Embodiment of this invention. It is a block diagram showing the structure of the 2nd Embodiment of this invention. It is a flowchart for demonstrating the operation | movement of the 2nd Embodiment of this invention. It is a block diagram showing the structure of the 3rd Embodiment of this invention. It is a flowchart for demonstrating the operation | movement of the 3rd Embodiment of this invention. It is a flowchart for demonstrating the operation | movement of the 3rd Embodiment of this invention. It is a figure for demonstrating a prior art. It is a figure for demonstrating a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Decoding process control part 2 PhCH decoding process selection part (Physical channel decoding process selection part)
3 PhCH decoding processor (physical channel decoding processor)
4 Pseudo PhCH decoding processing unit (pseudo physical channel decoding processing unit)
5 RAKE data receiving unit 6 2nd deinterleaver unit 7 TrCH separating unit (forwarding channel separating unit)
8 TrCH decoding process selection unit (transfer channel decoding process selection unit)
9 TrCH decoding processor (forwarding channel decoding processor)
10 Pseudo TrCH decoding processor (pseudo transfer channel decoding processor)
11 Rate dematching unit 12 1st deinterleaver unit 13 Viterbi decoding / turbo decoding unit 14 TrBk separation unit (transfer block separation unit)
15 Iub Processing Unit 16 Iub Frame Generation Unit 20 Code Processing Control Unit 21 Iub Processing Unit 22 Iub Frame Receiving Unit 23 TrCH Code Processing Unit (Transfer Channel Code Processing Unit)
24 TrCH code processing selection unit 25 CRC addition / TrBk combination unit 26 Convolution / turbo coding unit 27 Rate matching unit 28 1st DTX insertion unit 29 1st interleaver unit 30 Radio frame division unit 31 Pseudo TrCH code processing unit (pseudo transfer channel code processing) Part)
32 PhCH code processor (physical channel code processor)
33 PhCH code processing selection unit 34 TrCH multiplexing unit 35 2nd DTX insertion unit 36 PhCH division unit 37 2nd interleaver unit 38 PhCH data transmission unit 39 Pseudo PhCH code processing unit (pseudo physical channel code processing unit)
40 E-DCH decoding process selection unit (enhanced dedicated channel decoding process selection unit)
41 E-DCH decoding processing unit (enhanced dedicated channel decoding processing unit)
42 Pseudo E-DCH decoding processing unit (enhanced dedicated channel decoding processing unit)
43 RAKE data reception unit 44 Deinterleaver & PhCH multiplexing unit 45 Rate dematching / HARQ functionality unit 46 Turbo decoding unit 47 CRC deletion unit

Claims (20)

A decoding processing control unit that receives a baseband signal and call setting information, a transfer channel decoding processing unit that outputs signal data decoded for each transfer channel, and a separate signal data to each of the transfer channel decoding processing units A radio base station apparatus used in a CDMA (Code Division Multiple Access) mobile communication system comprising a physical channel decoding processing unit,
A pseudo-transfer channel decoding processor that generates dummy data instead of the transfer channel decoding processor;
A transfer channel decoding process selection unit that operates based on control information from the decoding process control unit,
The decoding processing control unit calculates a load accumulated value per unit time for the decoding process of the transfer channel based on the baseband signal and call setting information, and the load accumulated value exceeds a first threshold, and When the transfer channel to be processed is a packet-switched call channel, transmitting the first control information to the transfer channel decoding process selection unit to select the pseudo transfer channel decoding process unit;
A CDMA radio base station apparatus. Furthermore, a pseudo physical channel decoding processor that generates dummy data in place of the physical channel decoding processor;
A physical channel decoding process selection unit that operates based on control information from the decoding process control unit,
The decoding control unit, the load accumulated value, the load on the decoding processing of the physical channel which is calculated on the basis of the baseband signal and the call setting information in addition, when the load accumulated value exceeds the second threshold Sending second control information to the physical channel decoding process selection unit to select the pseudo physical channel decoding process unit;
The CDMA radio base station apparatus according to claim 1. The decoding processing control unit performs threshold determination of the load accumulated value for each head frame within a maximum transfer time interval (TTI) among transfer channels mapped to the physical channel;
The CDMA radio base station apparatus according to claim 2. Furthermore, an enhanced dedicated channel decoding processing unit for decoding the signal data of the enhanced dedicated channel (E-DCH),
A pseudo-enhanced dedicated channel decoding processor that generates dummy data instead of the enhanced dedicated channel decoding processor;
An enhanced dedicated channel decoding process selection unit that operates based on control information from the decoding process control unit,
The decoding control unit, the load accumulated value, the baseband signal and the load per unit time is added for the decoding of the enhanced dedicated channel is calculated on the basis of the call setting information, the load accumulated value third threshold The third dedicated control information is transmitted to the enhanced dedicated channel decoding process selection unit so as to select the pseudo enhanced dedicated channel decoding process unit,
The CDMA radio base station apparatus according to any one of claims 1 to 3. The decoding process control unit, when the load accumulated value obtained by adding a load per unit time for the decoding process of the enhanced dedicated channel exceeds a fourth threshold value that is smaller than the third threshold value, Transmitting the fourth control information to the enhanced dedicated channel decoding processing selection unit so as to select the enhanced dedicated channel decoding processing unit only when it is dedicated channel (E-DCH) signal data;
The CDMA radio base station apparatus according to claim 4. Using a cumulative value of a CPU (Central Processing Unit) usage rate estimated value as the load cumulative value;
The CDMA radio base station apparatus according to claim 1, wherein: A code processing control unit that receives call setting information and transfer channel information from a frame receiving unit that receives a frame from the base station controller, and a transfer channel code processing unit that outputs signal data encoded for each transfer channel; A radio base station used in a CDMA (Code Division Multiple Access) mobile communication system, comprising: a physical channel code processing unit that transmits a baseband signal using signal data received from each of the transfer channel code processing units A station device,
A pseudo-transfer channel code processing unit that generates dummy data instead of the transfer channel code processing unit;
A transfer channel code processing selection unit that operates based on control information from the code processing control unit,
The code processing control unit calculates a load accumulated value per unit time for code processing of the transfer channel based on the call setting information and the transfer channel information, the load accumulated value exceeds a first threshold, and the code When the transfer channel to be processed is a packet-switched call channel, transmitting the first control information to the transfer channel code processing selection unit to select the pseudo transfer channel code processing unit;
A CDMA radio base station apparatus. When the load accumulation value exceeds a second threshold value that is greater than the first threshold value, the code processing control unit determines whether the transfer channel to be subjected to the code processing is a packet-switched call, Transmitting first control information to the transfer channel code processing selection unit to select the pseudo transfer channel code processing unit;
The CDMA radio base station apparatus according to claim 7. A pseudo physical channel code processing unit that generates dummy data instead of the physical channel code processing unit;
A physical channel code processing selection unit that operates based on control information from the code processing control unit,
The code processing control unit, the load accumulated value, the load on the encoding processing of the physical channel which is calculated on the basis of the call setting information and transfer channel information added, when the load accumulated value exceeds said second threshold value Transmitting second control information to the physical channel code processing selection unit so as to select the pseudo physical channel code processing unit;
The CDMA radio base station apparatus according to claim 7 or 8. Using the cumulative value of the CPU usage rate estimated value as the load cumulative value;
The CDMA radio base station apparatus according to any one of claims 7 to 9. A decoding processing control unit that receives a baseband signal and call setting information, a transfer channel decoding processing unit that outputs signal data decoded for each transfer channel, and a separate signal data to each of the transfer channel decoding processing units A physical channel decoding processing unit, a pseudo transfer channel decoding processing unit that generates dummy data in place of the transfer channel decoding processing unit, and a transfer channel decoding processing selection unit that operates based on control information from the decoding processing control unit A baseband decoding processing method in a radio base station apparatus used in a CDMA (Code Division Multiple Access) mobile communication system comprising:
The decoding processing control unit calculating a load accumulated value per unit time for decoding processing of a transfer channel based on the baseband signal and call setting information;
When the load accumulation value exceeds the first threshold and the transfer channel to be decoded is a packet-switched call channel, the decoding process control unit selects the pseudo transfer channel decoding processing unit. Transmitting first control information to the transfer channel decoding process selection unit;
The transfer channel decoding process selection unit operating the pseudo transfer channel decoding process unit based on the first control information and omitting the decoding process for the transfer channel;
A baseband decoding method characterized by the above. The radio base station apparatus further includes a pseudo physical channel decoding processing unit that generates dummy data instead of the physical channel decoding processing unit,
A step of the decoding process control unit, the load accumulated value, Ru added load on the decoding processing of the physical channel which is calculated on the basis of the baseband signal and the call setting information,
When the load accumulated value exceeds a second threshold, the decoding process control unit transmits second control information to the physical channel decoding process selection unit so as to select the pseudo physical channel decoding process unit When,
The physical channel decoding process selection unit operating the pseudo physical channel decoding process unit based on the second control information and omitting the decoding process for the physical channel;
The baseband decoding processing method according to claim 11. The decoding processing control unit performs threshold determination of the load accumulated value for each head frame within a maximum transfer time interval (TTI) among transfer channels mapped to the physical channel;
The baseband decoding method according to claim 11 or 12, characterized in that: The radio base station apparatus further includes an enhanced dedicated channel decoding processing unit that decodes enhanced dedicated channel (E-DCH) signal data, and a pseudo enhanced dedicated method that generates dummy data in place of the enhanced dedicated channel decoding processing unit. A channel decoding processing unit,
The decoding processing control unit adding a load to the decoding process of the enhanced dedicated channel based on the baseband signal and call setting information to the load accumulated value ;
When the accumulated load value exceeds a third threshold, the decoding process control unit transmits third control information to the enhanced dedicated channel decoding process selection unit so as to select the pseudo enhanced dedicated channel decoding process unit And steps to
The enhanced dedicated channel decoding process selection unit operating the pseudo enhanced dedicated channel decoding process unit based on the third control information, and omitting the decoding process for the enhanced dedicated channel;
The baseband decoding processing method according to any one of claims 11 to 13. The decoding processing control unit, when a load accumulated value per unit time to which a load for decoding processing of the enhanced individual channel is added exceeds a fourth threshold value that is smaller than the third threshold value, Transmitting the fourth control information to the enhanced dedicated channel decoding processing selection unit so as to select the enhanced dedicated channel decoding processing unit only when it is signal data of a channel (E-DCH);
The baseband decoding processing method according to claim 14. Using the cumulative value of the CPU usage rate estimated value as the load cumulative value;
The baseband decoding processing method according to any one of claims 11 to 15. A code processing control unit that receives call setting information and transfer channel information from a frame receiving unit that receives a frame from the base station controller, and a transfer channel code processing unit that outputs signal data encoded for each transfer channel; A physical channel code processing unit that transmits a baseband signal using signal data received from each of the transfer channel code processing units, and a pseudo transfer channel code processing unit that generates dummy data instead of the transfer channel code processing unit A baseband in a radio base station apparatus used in a CDMA (Code Division Multiple Access) mobile communication system comprising: a transfer channel code processing selection unit that operates based on control information from the code processing control unit An encoding method,
The code processing control unit calculating a load accumulation value per unit time for code processing of a transfer channel based on the call setting information and transfer channel information;
When the load accumulation value exceeds the first threshold and the transfer channel to be subjected to code processing is a packet-switched call channel, the code processing control unit selects the pseudo transfer channel code processing unit. Transmitting first control information to the transfer channel code processing selection unit;
The transfer channel code processing selection unit operating the pseudo transfer channel code processing unit based on the first control information and omitting the encoding process for the transfer channel;
A baseband encoding method characterized by the above. Further, when the load accumulated value exceeds a second threshold value that is greater than the first threshold value, the code processing control unit determines whether the transfer channel to be subjected to the code processing is a packet-switched call or not. Transmitting the first control information to the transfer channel code processing selection unit so as to select the pseudo transfer channel code processing unit;
The baseband encoding processing method according to claim 17. The radio base station apparatus further includes a pseudo physical channel code processing unit that generates dummy data instead of the physical channel code processing unit,
A step of said encoding processing control unit, Ru added load on code processing of the calculated physical channel based on the call setting information and transfer the channel information,
When the load accumulated value exceeds the second threshold value, the code processing control unit transmits second control information to the physical channel code processing selection unit so as to select the pseudo physical channel code processing unit. Steps,
The physical channel code processing selecting unit operating the pseudo physical channel code processing unit based on the second control information and omitting the encoding process for the physical channel;
The baseband encoding processing method according to claim 17 or 18, characterized in that: Using the cumulative value of the CPU usage rate estimated value as the load cumulative value;
The baseband encoding method according to any one of claims 17 to 19, wherein

Images