JP2016039607A - Wireless communication device and determination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To standardize the number of cancellation times of an assignment signal between schedulers.SOLUTION: A wireless communication device 10 performs transmission processing of transmission data on the basis of an assignment signal determined as a processing object. In the wireless communication device 10, a plurality of schedulers 12 generate a plurality of assignment signals, each containing information about the transmission destination and the use frequency band. A selection unit 14 selects a processing candidate among the plurality of assignment signals generated by the plurality of schedulers 12, on the basis of the number of cancellation times of an assignment signal of each scheduler 12 in the past.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wireless communication apparatus and a determination method.

  Conventionally, in a wireless communication device on the transmission side, a scheduler generates an “assignment signal”. Then, the transmission processing unit executes a transmission data transmission process based on the “assignment signal” determined as the processing target among the plurality of “assignment signals” generated by the scheduler. The “assignment signal” includes information on “transmission destination” and “use frequency band”. The “transmission destination” is a wireless communication device on the receiving side. In addition, the “used frequency band” may be referred to as “component carrier (CC)” in 3GPP LTE-Advanced (3rd Generation Partnership Project Long Term Evolution-Advanced).

  Recently, a “carrier aggregation” service has been started in which a plurality of component carriers are assigned to users for communication. The technique of “carrier aggregation” is defined by LTE-Advanced. This “carrier aggregation” can improve the user throughput, while increasing the processing amount of the wireless communication apparatus. Along with this, the above-described scheduler, transmission processing unit, and the like have been conventionally realized with one device, but there are cases where it is unavoidable to realize with a plurality of devices.

  Therefore, conventionally, a wireless communication apparatus on the transmission side may have, for example, a plurality of schedulers in which each scheduler is realized by one device and a transmission processing unit realized by one device.

  Here, the transmission processing unit has a “number of processing capabilities” that is the number of allocation signals that can be processed per predetermined time. Accordingly, the transmission processing unit determines an allocation signal within the “number of processing capabilities” as a processing target among a plurality of allocation signals received from a plurality of schedulers, and discards the rest. Conventionally, the transmission processing unit determines the allocation signal to be processed by selecting the allocation signal while changing the scheduler of the generation source in order. That is, the “round robin method” is used to determine the allocation signal to be processed.

JP 2011-239393 A

  However, when the allocation signal to be processed is determined uniformly by the “round robin method” as in the past, if there is a bias in the number of allocation signals generated between schedulers, the allocation signal generated by a specific scheduler The number of discards may increase. That is, there is a possibility that the probability that an allocation signal generated by a specific scheduler is processed will be lower than that of other schedulers.

  The disclosed technique has been made in view of the above, and an object of the present invention is to provide a wireless communication apparatus and a determination method capable of leveling the number of times of allocation signal discarding between schedulers.

  In the aspect of the disclosure, the wireless communication apparatus performs transmission data transmission processing based on the allocation signal determined as the processing target, and includes a plurality of schedulers and a selection unit. The plurality of schedulers generate a plurality of allocation signals in which each allocation signal includes information on a transmission destination and a used frequency band. The selection unit selects a processing candidate from the generated plurality of allocation signals based on the number of discards of past allocation signals in each scheduler.

  According to the disclosed aspect, the number of allocation signal discards can be leveled between schedulers.

FIG. 1 is a diagram illustrating an example of a wireless communication system according to the first embodiment. FIG. 2 is a block diagram illustrating an example of the first communication device according to the first embodiment. FIG. 3 is a diagram illustrating an example of the discard number table. FIG. 4 is a diagram illustrating an example of the initial list. FIG. 5 is a flowchart illustrating an example of a processing operation of the first wireless device according to the first embodiment. FIG. 6 is a diagram for explaining the processing operation of the first wireless communication apparatus according to the first embodiment. FIG. 7 is a diagram for explaining the processing operation of the first wireless communication apparatus according to the first embodiment. FIG. 8 is a diagram for explaining the processing operation of the first wireless communication apparatus according to the first embodiment. FIG. 9 is a diagram illustrating a hardware configuration example of the wireless communication device.

  Hereinafter, embodiments of a wireless communication apparatus and a determination method disclosed in the present application will be described in detail with reference to the drawings. Note that the wireless communication device and the determination method disclosed in the present application are not limited by this embodiment. Moreover, the same code | symbol is attached | subjected to the structure which has the same function in embodiment, and the overlapping description is abbreviate | omitted.

[Example 1]
[Outline of wireless communication system]
FIG. 1 is a diagram illustrating an example of a wireless communication system according to the first embodiment. In FIG. 1, the wireless communication system 1 includes a wireless communication device 10 and wireless communication devices 50-1 to 50-6. The wireless communication device 10 is, for example, a base station to which LTE-Advanced is applied, and each of the wireless communication devices 50-1 to 50-6 is, for example, a terminal to which LTE-Advanced is applied. That is, the wireless communication system 1 can use carrier aggregation. Here, the numbers of the wireless communication devices 10 and the wireless communication devices 50 are one and six, respectively, but these numbers are not limited thereto. Hereinafter, the radio communication devices 50-1 to 50-6 may be referred to as UE # A to F. In addition, when the wireless communication devices 50-1 to 50-6 are not particularly distinguished, they may be collectively referred to as the wireless communication device 50. Hereinafter, the wireless communication device 10 may be referred to as a “first communication device” and the wireless communication device 50 may be referred to as a “second communication device”.

  Communication between the wireless communication device 10 and each wireless communication device 50 is performed based on scheduling by the wireless communication device 10. That is, the wireless communication device 10 performs transmission processing of transmission data based on the allocation signal (that is, allocation information unit) determined as the processing target.

  As will be described later, the wireless communication device 10 has a plurality of schedulers. Each scheduler generates a plurality of allocation signals. Each allocation signal includes information on “transmission destination” and “use frequency band”. The “transmission destination” is any one of the wireless communication devices 50-1 to 50-6. Further, when, for example, three component carriers (CC1 to CC3) are used in the wireless communication system 1, the “use frequency band” is any one of CC1 to CC3. Further, the allocation signal may include “transmission permission data amount”. Alternatively, the transmission permission data amount may be determined in advance for one allocation signal.

  Then, the wireless communication device 10 selects a “processing candidate” from a plurality of allocation signals generated by a plurality of schedulers based on the number of times the allocation signal is discarded by each scheduler. For example, the radio communication device 10 distributes the processable number of transmission processing units that execute transmission processing to each scheduler based on the ratio of the number of discards of past allocation signals in each scheduler. Then, the number of allocation signals distributed to each scheduler is selected as a “processing candidate” from a plurality of allocation signals generated by each scheduler.

  As described above, the wireless communication device 10 selects a “processing candidate” from a plurality of allocation signals generated by a plurality of schedulers based on the number of times the allocation signal is discarded by each scheduler. Thereby, even when the number of allocation signal generations between the schedulers is uneven, the number of allocation signal discards can be leveled between the schedulers.

[Configuration Example of First Communication Device]
FIG. 2 is a block diagram illustrating an example of the first communication device according to the first embodiment. In FIG. 2, the wireless communication device 10 includes a transmission buffer 11, schedulers 12-1 to 12, an allocation signal buffer 13, a selection unit 14, a storage unit 15, a determination unit 16, a table management unit 17, A transmission processing unit 18 and a wireless transmission unit 19 are included. For example, the transmission buffer 11 and the transmission processing unit 18 are functional units of layer 1 (L1) and layer 2 (L2). Further, the allocation signal buffer 13, the selection unit 14, the storage unit 15, the determination unit 16, and the table management unit 17 are L2 functional units. L2 includes, for example, PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), and MAC (Medium Access Control). Although the number of schedulers 12 is four here, the number is not limited to this. Hereinafter, the schedulers 12-1 to 12-4 may be referred to as SCD # 1 to SCD4, respectively.

  The transmission buffer 11 inputs and holds transmission data addressed to the wireless communication device 50. The transmission buffer 11 outputs transmission data by reading by the transmission processing unit 18.

  Each scheduler 12 receives information (transmission destination or the like) related to transmission data held in the transmission buffer 11 and generates an allocation signal based on the received information. Each scheduler 12 is realized by one independent device. Each scheduler 12 outputs the allocation signal generated for each “schedule unit time” to the allocation signal buffer 13 at a time. Each scheduler 12 may perform scheduling for a plurality of used frequency bands. Alternatively, each scheduler 12 may schedule a use frequency band different from the other schedulers 12. That is, the schedulers 12-1 to 12-4 may be associated with different use frequency bands. The following description is based on the assumption that each scheduler 12 schedules a plurality of used frequency bands.

  The allocation signal buffer 13 receives and holds the allocation signals generated by each of the schedulers 12-1 to 12-4 in order for each scheduler 12. The allocation signal buffer 13 holds the allocation signals in the order in which the allocation signals are received in units of the scheduler 12.

  The selection unit 14 selects a processing candidate in the transmission processing unit 18 from a plurality of allocation signals held in the allocation signal buffer 13 on the basis of the “number of discards” of past allocation signals in each scheduler 12. . For example, the selection unit 14 distributes the “processable number” of the transmission processing unit 18 to each scheduler 12 based on the ratio of the number of discards of past allocation signals in each scheduler 12, and distributes to each scheduler 12. A number of allocation signals are selected as processing candidates from a plurality of allocation signals generated by each scheduler 12.

  For example, the selection unit 14 creates an “initial list” based on a plurality of allocation signals held in the allocation signal buffer 13 and a “discard number table” stored in the storage unit 15. FIG. 3 is a diagram illustrating an example of the discard number table. As shown in FIG. 3, the “discard number table” stores the discard number for each assigned signal generated by each scheduler 12. That is, in FIG. 3, “SCD number” is identification information of the scheduler 12 of the generation source, “UE number” is identification information of the transmission destination, and “CC number” is identification information of the used frequency band. is there. Therefore, an allocation signal is specified by a combination of “SCD number”, “UE number”, and “CC number”. Each allocation signal and the number of discards are stored in association with each other. FIG. 4 is a diagram illustrating an example of the initial list. As shown in FIG. 4, the initial list corresponds to a table obtained by extracting a part of a plurality of allocation signals held in the allocation signal buffer 13 from the “discard number table”. That is, the selection unit 14 creates an initial list by associating each of the plurality of allocation signals held in the allocation signal buffer 13 with the discard number stored in the discard number table. Then, the selection unit 14 refers to the created initial list and calculates the total number of discards in units of the scheduler 12. Then, the selection unit 14 distributes the “processable number” of the transmission processing unit 18 to each scheduler 12 based on the ratio of the total sum of the discard numbers calculated for each scheduler 12. Then, the selection unit 14 creates a “candidate list” by selecting the number of allocation signals distributed to each scheduler 12 as a processing candidate from a plurality of allocation signals generated by each scheduler 12. That is, the “candidate list” is a list including the allocation signal selected by the selection unit 14. Here, the selection unit 14 selects an allocation signal as a processing candidate from the plurality of allocation signals generated by each scheduler 12 in order of increasing number of discards.

  Then, the selection unit 14 outputs the created “initial list” and “candidate list” to the determination unit 16.

  The storage unit 15 stores the discard number table.

  The determination unit 16 determines the allocation signal to be processed based on the “initial list” and “candidate list” received from the selection unit 14 and the “decision rule”. Then, the determination unit 16 outputs a “processing target list” including the determined allocation signal to the transmission processing unit 18, and outputs the “processing target list” and the “initial list” to the table management unit 17. Here, allocation signals that are included in the initial list and that are not to be processed are discarded.

For example, the “decision rule” includes the following rules.
(Rule 1) Among a plurality of allocation signals included in the “candidate list”, an allocation signal whose transmission destination is not common to other allocation signals is determined as a processing target.
(Rule 2) The “candidate list” includes a plurality of allocation signals having a common transmission destination, and the “primary cell” and the “secondary cell” of the transmission destination are included in the use frequency bands of the plurality of allocation signals. If included, the allocation signal of the primary cell is determined as a processing target, and the allocation signal of the secondary cell is excluded from the processing target.
(Rule 3) If the “candidate list” includes a plurality of allocation signals having a common transmission destination, and the frequency bands used for the plurality of allocation signals are all “secondary cells” of the transmission destination, The secondary cell allocation signal of the earliest is determined as a processing target, and other secondary cell allocation signals are excluded from the processing target.
(Rule 4) An allocation signal that is common to the allocation signal excluded from the processing target and the scheduler 12 of the generation source and is not listed in the “candidate list” (hereinafter, may be referred to as “remaining allocation signal”) is referred to as “initial list”. ”, Instead of the allocation signal excluded from the processing target, the allocation signal having the largest number of discards in the“ remaining allocation signal ”is determined as the processing target.
(Rule 5) If there is no “remaining allocation signal” common to the allocation signal excluded from the processing target and the scheduler 12 of the generation source, the “remaining allocation signal” having the earliest acceptance order and the largest number of discards is determined as the processing target. To do.

  The table management unit 17 updates the discard number table stored in the storage unit 15. For example, the table management unit 17 uses the “initial list” and the “processing target list” to identify the allocation signal to be discarded, and sets the discard number associated with the allocation signal to be discarded in the discard number table to 1 Increment by one. When the specified allocation signal to be discarded is not stored in the discard table, the allocated signal is registered in the discard table and the discard number is set to 1.

  The transmission processing unit 18 reads the transmission data corresponding to the transmission destination indicated by each target allocation signal included in the processing target list received from the determination unit 16 from the transmission buffer 11, and uses the read transmission data as the use frequency indicated by the target allocation signal. Transmission is performed via the wireless transmission unit 19 in the band. Here, the transmission processing unit 18 functions as an L2 functional unit and an L1 functional unit as described above. The transmission processing unit 18 performs encoding processing and modulation processing as an L1 function unit, and outputs the obtained transmission signal to the wireless transmission unit 19.

  The wireless transmission unit 19 wirelessly transmits the transmission signal received from the transmission processing unit 18 using the use frequency band corresponding to the transmission signal.

[Example of Operation of First Communication Device]
An example of the processing operation of the wireless communication apparatus 10 having the above configuration will be described. FIG. 5 is a flowchart illustrating an example of a processing operation of the first wireless device according to the first embodiment. 6 to 8 are diagrams for explaining the processing operation of the first wireless communication apparatus according to the first embodiment. Note that the processing flow shown in the flowchart of FIG. 5 is executed in one “schedule unit time”. That is, the processing flow shown in the flowchart shown in FIG. 5 is repeatedly executed in a plurality of “schedule unit times”.

<Allocation signal acceptance process>
The allocation signal buffer 13 receives the allocation signals generated by the schedulers 12-1 to 12-4 in order in units of the scheduler 12 (step S101). For example, in FIG. 6, two allocation signals are first received from the scheduler 12-3 (SCD # 3). In FIG. 6, the reception order is described as “reception order”. In FIG. 6, the allocation signal is described as “MAC PDU generation information”. Of the two allocation signals, the first allocation signal is an allocation signal of “transmission destination: UE # B, used frequency band: CC1”, and the second allocation signal is “transmission destination: UE # C, used. This is an allocation signal of “frequency band: CC1”.

<Processing candidate selection process>
The selection unit 14 selects a processing candidate in the transmission processing unit 18 from among a plurality of allocation signals held in the allocation signal buffer 13 (step S102).

  For example, the selection unit 14 creates an “initial list” based on a plurality of allocation signals held in the allocation signal buffer 13 and a “discard number table” stored in the storage unit 15. In the “initial list” illustrated in FIG. 6, the number of discards = 4 is associated with the allocation signal “transmission destination: UE # B, used frequency band: CC1”, and “transmission destination: UE # C, used frequency band”. : CC1 ”is associated with the number of discards = 6.

  Then, the selection unit 14 refers to the created initial list and calculates the total number of discards in units of the scheduler 12. Based on the initial list shown in FIG. 6, the total number of discards of SCD # 3 is 10, the total number of discards of SCD # 4 is 5, and the total number of discards of SCD # 2 is 8. The total number of discards of SCD # 1 is 3.

Then, the selection unit 14 calculates the ratio of the total sum of the calculated number of discards. In the example of FIG. 6, the ratio of the total number of discards is as follows.
SCD # 3: SCD # 4: SCD # 2: SCD # 1 = 2: 1: 2: 1

  Then, the selection unit 14 distributes the “processable number” of the transmission processing unit 18 to each scheduler 12 based on the ratio of the total sum of the discard numbers calculated for each scheduler 12. Here, assuming that the “number of processable” is 6, the number distributed to each scheduler 12 is two for SCD # 3, one for SCD # 4, and two for SCD # 2. There is one SCD # 1.

  Then, the selection unit 14 selects the number of allocation signals distributed to each scheduler 12 as a processing candidate from a plurality of allocation signals generated by each scheduler 12. Here, the selection unit 14 selects an allocation signal as a processing candidate from the plurality of allocation signals generated by each scheduler 12 in order of increasing number of discards. For this reason, in FIG. 6, among the three allocation signals of SCD # 4, the allocation signal of “transmission destination: UE # A, used frequency band: CC2” having the discard count of 2 is selected as a processing candidate. . In this way, a “candidate list” is created.

<Determination processing for processing target>
The determination unit 16 determines the allocation signal to be processed according to the “determination rule” (step S103).

  For example, in the “candidate list” illustrated in FIG. 6, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE # D, Since the allocation signals of “frequency band used: CC1” and “transmission destination: UE # F, frequency band used: CC1” are allocation signals whose transmission destination is not shared with other allocation signals, they are determined according to the above (rule 1). The unit 16 determines these allocation signals as processing targets. Therefore, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE # D, used frequency band: CC1”, and “ As shown in FIG. 6, the allocation signal of “transmission destination: UE # F, use frequency band: CC1” is included in the “processing target list”.

  In the “candidate list” shown in FIG. 6, the allocation signals of “transmission destination: UE # A, used frequency band: CC1” and “transmission destination: UE # A, used frequency band: CC2” The latter corresponds to the secondary cell. Therefore, the determination unit 16 determines the allocation signal of “transmission destination: UE # A, used frequency band: CC1” as a processing target according to the above (rule 2), and determines “transmission destination: UE # A, used frequency”. The assigned signal of “band: CC2” is excluded from the processing target. Then, since there is a remaining allocation signal in SCD # 4 that is the generation source of the “transmission destination: UE # A, used frequency band: CC2” excluded from the processing target, the determination unit 16 includes the “remaining allocation signal”. "Transmission destination: UE # D, used frequency band: CC1", which is the allocation signal with the largest number of discards, is determined as a processing target. Thus, the allocation signals of “transmission destination: UE # A, used frequency band: CC1” and “transmission destination: UE # D, used frequency band: CC1” are included in the “processing target list” as shown in FIG. It has been.

  For example, in the “candidate list” illustrated in FIG. 7, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE #”. D, use frequency band: CC1 ”and“ transmission destination: UE # F, use frequency band: CC1 ”are assigned signals whose transmission destinations are not common to other assignment signals, and therefore, according to the above (rule 1) The determination unit 16 determines these allocation signals as processing targets. Therefore, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE # D, used frequency band: CC1”, and “ As shown in FIG. 7, the allocation signal of “transmission destination: UE # F, use frequency band: CC1” is included in the “processing target list”.

  In the “candidate list” shown in FIG. 7, the allocation signals of “transmission destination: UE # A, used frequency band: CC2” and “transmission destination: UE # A, used frequency band: CC3” are both secondary cells. Corresponding to For this reason, the determination unit 16 treats the assignment signal of “transmission destination: UE # A, used frequency band: CC2”, which is the assignment signal of the secondary cell in the earliest acceptance order, according to the above (rule 3). The assigned signal of “transmission destination: UE # A, used frequency band: CC3” is excluded from processing targets. Then, since there is a remaining allocation signal in SCD # 2, which is a generation source of the “transmission destination: UE # A, used frequency band: CC3”, excluded from the processing target, the determination unit 16 includes the “remaining allocation signal”. "Transmission destination: UE # G, used frequency band: CC1", which is the allocation signal with the largest number of discards, is determined as a processing target. Thus, the allocation signals of “transmission destination: UE # A, used frequency band: CC2” and “transmission destination: UE # G, used frequency band: CC1” are included in the “processing target list” as shown in FIG. It has been.

  Further, for example, in the “candidate list” illustrated in FIG. 8, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE #”. F, the use frequency band: CC1 ”and the assignment signal of“ transmission destination: UE # E, use frequency band: CC1 ”are assignment signals whose transmission destination is not common to other assignment signals, and therefore, according to the above (rule 1) The determination unit 16 determines these allocation signals as processing targets. Therefore, “transmission destination: UE # B, used frequency band: CC1”, “transmission destination: UE # C, used frequency band: CC1”, “transmission destination: UE # F, used frequency band: CC1”, and “ As shown in FIG. 8, the allocation signal of “transmission destination: UE # E, use frequency band: CC1” is included in the “processing target list”.

  In the “candidate list” shown in FIG. 8, the allocation signals of “transmission destination: UE # A, used frequency band: CC1” and “transmission destination: UE # A, used frequency band: CC2” The latter corresponds to the secondary cell. Therefore, the determination unit 16 determines the allocation signal of “transmission destination: UE # A, used frequency band: CC1” as a processing target according to the above (rule 2), and determines “transmission destination: UE # A, used frequency”. The assigned signal of “band: CC2” is excluded from the processing target. Then, since there is no remaining allocation signal in SCD # 4 which is the generation source of the allocation signal of “transmission destination: UE # A, used frequency band: CC2” excluded from the processing target, ), An allocation signal of “transmission destination: UE # D, used frequency band: CC1”, which is the “remaining allocation signal” having the earliest acceptance order and the largest number of discards, is determined as a processing target. Thus, the allocation signals of “transmission destination: UE # A, used frequency band: CC1” and “transmission destination: UE # D, used frequency band: CC1” are included in the “processing target list” as shown in FIG. It has been.

  Then, the determination unit 16 outputs a “processing target list” including the determined allocation signal to the transmission processing unit 18, and outputs the “processing target list” and the “initial list” to the table management unit 17.

<Execution of transmission processing>
The transmission processing unit 18 executes transmission processing according to the processing target list received from the determining unit 16 (that is, the allocation signal to be processed) (step S104). That is, the transmission processing unit 18 reads the transmission data corresponding to the transmission destination indicated by each target allocation signal included in the processing target list received from the determination unit 16 from the transmission buffer 11, and indicates the read transmission data in the target allocation signal. It transmits via the wireless transmission part 19 in a use frequency band.

<Discard count table update process>
The table management unit 17 updates the discard number table stored in the storage unit 15 (step S105). That is, the table management unit 17 identifies the allocation signal to be discarded using the “initial list” and the “processing target list”, and sets the discard number associated with the allocation signal to be discarded in the discard number table to 1 Increment by one. When the specified allocation signal to be discarded is not stored in the discard table, the allocated signal is registered in the discard table and the discard number is set to 1.

  As described above, according to the present embodiment, the wireless communication device 10 executes transmission processing of transmission data based on the allocation signal determined as the processing target. In the wireless communication device 10, the plurality of schedulers 12 generate a plurality of allocation signals, and each allocation signal includes information on a transmission destination and a used frequency band. Then, the selection unit 14 selects a processing candidate from a plurality of allocation signals generated by the plurality of schedulers 12 based on the number of discards of past allocation signals in each scheduler 12.

  For example, the selection unit 14 distributes the processable number of the transmission processing unit 18 to each scheduler 12 based on the ratio of the number of discards of past allocation signals in each scheduler 12. Then, the selection unit 14 selects the number of allocation signals distributed to each scheduler 12 as a processing candidate from a plurality of allocation signals generated by each scheduler 12.

  With this configuration of the wireless communication device 10, the allocation signal of the scheduler 12 with a large number of past discards can be given priority over the allocation signals of the other schedulers 12, so that the number of discards of the allocation signal can be set to the scheduler 12. Can be leveled between.

  Further, the selection unit 14 selects an allocation signal as a processing candidate from the plurality of allocation signals generated by one scheduler 12 in the order of the number of discards.

  With the configuration of the wireless communication device 10, the number of discards can be leveled even between allocation signals generated by the same scheduler 12.

  Further, in the wireless communication device 10, the determination unit 16 determines the remainder obtained by removing a part of the plurality of allocation signals having the same transmission destination from the plurality of processing candidates selected by the selection unit 14 as a processing target. .

  With the configuration of the wireless communication device 10, it is possible to deal with the allocation signals of other transmission destinations by the number of some of the allocation signals excluded, so that the number of connected UEs can be increased.

  For example, the determination unit 16 determines, as a processing target, an allocation signal whose use frequency band is a primary cell, except for an allocation signal whose use frequency band is a secondary cell, among a plurality of allocation signals having a common transmission destination. Moreover, the determination part 16 determines the allocation signal with an early reception order as a process target, when all the use frequencies of the some allocation signal with a common transmission destination are secondary cells. That is, the determination unit 16 determines a processing target using scheduling information of carrier aggregation.

  With the configuration of the wireless communication device 10, the allocation signal to be processed can be determined in consideration of the importance of the used frequency band.

[Other embodiments]
Each component of each part illustrated in the first embodiment does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each part is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured.

  Furthermore, various processing functions performed in each device are performed on a CPU (Central Processing Unit) (or a microcomputer such as an MPU (Micro Processing Unit), MCU (Micro Controller Unit), etc.) in whole or in part. You may make it perform. Various processing functions may be executed entirely or arbitrarily on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. .

  The wireless communication apparatus according to the first embodiment can be realized by, for example, the following hardware configuration.

  FIG. 9 is a diagram illustrating a hardware configuration example of the wireless communication device. As illustrated in FIG. 9, the wireless communication device 100 includes processors 101 to 105, an I / F (Inter / Face) 106, a memory 107, and an RF (Radio Frequency) circuit 108. Examples of each of the processors 101 to 105 include a CPU, a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and the like. Further, examples of the memory 107 include a random access memory (RAM) such as a SDRAM (Synchronous Dynamic Random Access Memory), a read only memory (ROM), and a flash memory.

  Various processing functions performed by the wireless communication apparatus according to the first embodiment may be realized by executing a program stored in various memories such as a nonvolatile storage medium using a processor. That is, a program corresponding to each process executed by the schedulers 12-1 to 4 may be recorded in the memory 107, and each program may be executed by each of the processors 101 to 105. A program corresponding to each process executed by the selection unit 14, the determination unit 16, the table management unit 17, and the transmission processing unit 18 may be recorded in the memory 107, and each program may be executed by the processor 105. The transmission buffer 11, the allocation signal buffer 13, and the storage unit 15 are realized by the memory 107. The wireless transmission unit 19 is realized by the RF circuit 108.

DESCRIPTION OF SYMBOLS 1,50 Wireless communication system 10 Wireless communication apparatus 11 Transmission buffer 12 Scheduler 13 Allocation signal buffer 14 Selection part 15 Storage part 16 Determination part 17 Table management part 18 Transmission processing part 19 Wireless transmission part

Claims (7)

A wireless communication device that executes transmission processing of transmission data based on an allocation signal determined as a processing target,
A plurality of schedulers for generating a plurality of allocation signals each including information on a transmission destination and a used frequency band;
A selection unit that selects a processing candidate based on the number of discards of past allocation signals in each scheduler from the generated plurality of allocation signals;
A wireless communication apparatus comprising: The selection unit distributes the processable number of transmission processing units that execute the transmission process to the schedulers based on a ratio of the number of discards of past allocation signals in the schedulers, and distributes to each scheduler. Selecting the number of allocation signals as the processing candidates from a plurality of allocation signals generated by each scheduler,
The wireless communication apparatus according to claim 1. The selection unit selects the allocation signal of the processing candidate from the plurality of allocation signals generated by the schedulers in order of the number of discards.
The wireless communication apparatus according to claim 2. A determination unit that determines, as the processing target, a remainder obtained by removing a part of a plurality of allocation signals having the same transmission destination from a plurality of processing candidates selected by the selection unit;
The wireless communication apparatus according to claim 1, further comprising: The determination unit determines, as the processing target, an allocation signal whose usage frequency band is a primary cell, except for an allocation signal whose usage frequency band is a secondary cell, among a plurality of allocation signals having the same transmission destination. ,
The wireless communication apparatus according to claim 4. The determining unit determines, as the processing target, an allocation signal with an early reception order when all of the use frequency bands of the plurality of allocation signals with the same transmission destination are secondary cells,
The wireless communication apparatus according to claim 4. A method for determining a processing target in a wireless communication apparatus that executes transmission processing of transmission data based on an allocation signal determined as a processing target,
Processing based on the number of discards of past allocation signals in each scheduler from among a plurality of allocation signals generated by a plurality of schedulers of the wireless communication device and each allocation signal including information on a transmission destination and a used frequency band Select a candidate,
A determination method characterized by that.

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