Wireless communication device, wireless communication system, and transmission method

Abstract

This radio communication device (100, 200) comprises a control unit (120, 220) that: can configure entities for processing data transported by a radio bearer; can configure a plurality of communication channels having different communication settings with respect to the requirements of said data; selects one of the plurality of communication channels in accordance with the condition of said data; and can control the implementation of data communication with an opposed radio communication device. In this way, the data arrival time can be flexibly controlled.

Description

[Technical field]

[0001] The present invention relates to a wireless communication device, a wireless communication system, and a transmission method. [Background technology]

[0002] In the field of communications, depending on application requirements, it may be necessary to adhere to an arrival time at which transmitted data arrives at a receiver.

[0003] One example is guaranteed-time-of-arrival communication. Guaranteed-time-of-arrival communication is used in holographic communication that projects three-dimensional images, and there are three types of methods for specifying the data arrival time: The first method is a method in which data is made to arrive by a set time, and the maximum time it takes for the data to arrive at the receiving end is specified. The second method is a method in which data is made to arrive within a set time range, and the minimum and maximum times it takes for the data to arrive at the receiving end are specified. The third method is a method in which multiple data items arrive almost simultaneously within a set time range, and the variance of the time it takes for the multiple data items to arrive at the receiving end is specified.

[0004] For example, 3GPP is discussing TSC (Time-Sensitive Communication). Service Time is defined as the grace period for the arrival time of transmitted data, and if the transmitted data arrives within the grace period, it is guaranteed that the application will operate normally. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2020 / 003539 [Patent Document 2] International Publication No. 2018 / 070465 [Non-patent literature]

[0006] [Non-licensed document 1] 3GPP TS 36.133 V16.7.0(2020-09) [Non-licensed document 2] 3GPP TS 36.211 V16.4.0(2020-12) [Non-licensed document 3] 3GPP TS 36.212 V16.4.0(2020-12)

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[0007] However, in the fifth generation mobile communication (5G or NR (New Radio)), which has been put into practical use in recent years, there is a problem that it is difficult to finely control the time when transmitted data arrives at the receiving end. Specifically, since there is not much support for time limits on data transmission, it is not easy to flexibly control the time when data arrives at the receiving end, and scheduling to observe the data arrival time is difficult.

[0008] The disclosed technology has been made in consideration of the above points, and has an object to provide a wireless communication device, a wireless communication system, and a transmission method that are capable of flexibly controlling the arrival time of data. [Means for solving the problem]

[0009] In one aspect, the wireless communication device disclosed in the present application has a control unit that can configure an entity that processes data transmitted by a wireless bearer, can configure multiple communication channels with different communication settings for the requirements of the data, can select one communication channel from the multiple communication channels depending on the state of the data, and can control the implementation of data communication with a counterpart wireless communication device. Effect of the Invention

[0010] According to one aspect of the wireless communication device, wireless communication system, and transmission method disclosed in the present application, it is possible to provide an advantage that the arrival time of data can be flexibly controlled. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing a configuration of a base station apparatus according to the first embodiment. [Diagram 2] FIG. 2 is a block diagram showing a configuration of the processor according to the first embodiment. [Diagram 3] FIG. 3 is a block diagram showing a configuration of a terminal device according to the first embodiment. [Figure 4] FIG. 4 is a diagram illustrating a transmission method according to the first embodiment. [Diagram 5] FIG. 5 is a block diagram showing a configuration of a processor according to the second embodiment. [Figure 6] FIG. 6 is a diagram illustrating a transmission method according to the second embodiment. [Figure 7] FIG. 7 is a diagram showing a specific example of distribution of transmission data. [Figure 8] FIG. 8 is a diagram illustrating another transmission method according to the second embodiment. [Figure 9] FIG. 9 is a diagram illustrating a transmission method according to the third embodiment. [Figure 10] FIG. 10 is a diagram showing a modified example of the configuration of the base station device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments of a wireless communication device, a wireless communication system, and a transmission method disclosed in the present application will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

[0013] (Embodiment 1) Fig. 1 is a block diagram showing a configuration of a base station device 100 according to embodiment 1. The base station device 100 is an example of a wireless communication device. The base station device 100 shown in Fig. 1 includes a network interface (hereinafter abbreviated as "network IF") 110, a processor 120, a memory 130, and a wireless communication unit 140.

[0014] The network IF 110 is connected by wire to a core network (not shown), and transmits and receives signals to and from devices that configure the core network.

[0015] The processor 120 is a control unit that includes, for example, a CPU (Central Processing Unit), an FPGA (Field Programmable Gate Array), or a DSP (Digital Signal Processor), and controls the entire base station device 100. The processor 120 also executes processing of a predetermined communication protocol corresponding to a radio bearer for data to be wirelessly transmitted. At this time, the processor 120 configures multiple communication channels with different communication settings, such as the maximum time allowed for transmission, in response to the requirements of the data. The processor 120 then selects a communication channel according to the state of the transmission data, such as the delay time allowed for each transmission data and the number of transmissions (initial transmission or retransmission) for each transmission data, and transmits the data using the selected communication channel.

[0016] The memory 130 includes, for example, a random access memory (RAM) or a read only memory (ROM), and stores information used in processing by the processor 120.

[0017] The wireless communication unit 140 performs wireless communication with a terminal device, which is an opposing wireless communication device. The wireless communication unit 140 transmits transmission data that has been subjected to processing of each communication protocol in the processor 120 to the terminal device, which is the opposing wireless communication device. The wireless communication unit 140 also transmits setting information related to data transmission of the terminal device, which is the opposing wireless communication device, to this terminal device. Then, the wireless communication unit 140 receives data that the terminal device wirelessly transmits in accordance with the setting information.

[0018] Fig. 2 is a block diagram showing a configuration of processor 120 according to embodiment 1. Processor 120 shown in Fig. 2 has a first protocol processing unit 121, a second protocol processing unit 122, a third protocol processing unit 123, and a fourth protocol processing unit .

[0019] The first protocol processing unit 121 configures a first entity, which is an entity of the first protocol, for each radio bearer, and executes first protocol processing on transmission data using the first entity.

[0020] The second protocol processing unit 122 configures a second entity, which is an entity of the second protocol, for each radio bearer, and executes processing of the second protocol on the transmission data that has been processed by the first protocol, using the second entity. The second entity configured by the second protocol processing unit 122 selects one communication channel from multiple communication channels associated with the third entity in the third protocol processing unit 123, for example, in accordance with the requirements of the transmission data.

[0021] The third protocol processing unit 123 configures a third entity, which is an entity of the third protocol, for each radio bearer, and executes the processing of the third protocol on the transmission data that has been processed by the second protocol, using the third entity. The third entity configured by the third protocol processing unit 123 is associated with a plurality of communication channels each having different communication settings, and the third entity allocates the transmission data to the communication channel selected by the second entity.

[0022] The fourth protocol processing unit 124 configures a fourth entity, which is an entity of the fourth protocol, for each radio bearer, and executes the processing of the fourth protocol on the transmission data that has been processed according to the third protocol, using the fourth entity. The fourth entity configured by the fourth protocol processing unit 124 outputs a transmission packet obtained by processing according to the fourth protocol to the radio communication unit 140, and transmits the packet wirelessly.

[0023] 3 is a block diagram showing a configuration of a terminal device 200 connected to the base station device 100. The terminal device 200 is an example of a wireless communication device. The terminal device 200 shown in FIG.

[0024] The wireless communication unit 210 performs wireless communication with the base station device 100, which is the opposing wireless communication device. The wireless communication unit 210 receives setting information related to data transmission from the base station device 100, which is the opposing wireless communication device. The wireless communication unit 210 then transmits transmission data that has been subjected to processing of each communication protocol in the processor 220 according to the setting information to the base station device 100, which is the opposing wireless communication device.

[0025] The processor 220 is a control unit that includes, for example, a CPU, an FPGA, or a DSP, and controls the entire terminal device 200. The processor 220 also executes processing of a predetermined communication protocol corresponding to a radio bearer for data to be wirelessly transmitted. The processor 220 of the terminal device 200 can execute the same control as the processor 120 of the base station device 100. That is, the processor 220 configures multiple communication channels with different communication settings according to the requirements of the data. The processor 220 then selects a communication channel according to the state of the transmission data, and transmits the data using the selected communication channel.

[0026] The communication settings are parameters related to communication requirements, such as the maximum time allowed for transmission, priority, subcarrier spacing (or numerology), etc. The communication settings can be set for each communication channel. The state of the transmission data is parameters related to communication quality, such as the delay time allowed for each transmission data, priority, jitter, and the number of transmissions (initial transmission or retransmission) for each transmission data.

[0027] The memory 230 includes, for example, a RAM or a ROM, and stores information used in processing by the processor 220.

[0028] Next, a transmission method for each radio bearer according to the first embodiment will be described with reference to Fig. 4. The transmission method described below is executed by the base station apparatus 100 shown in Fig. 1 or the terminal apparatus 200 shown in Fig. 3.

[0029] In this embodiment, when a radio bearer is established, the processor 120 (or the processor 220) configures a first entity of a first protocol, a second entity of a second protocol, a third entity of a third protocol, and a fourth entity of a fourth protocol, which correspond to the radio bearer. In Fig. 4, the second entity 122a, the third entity 123a, and the fourth entity 124a are illustrated. The third entity 123a is associated with a plurality of communication channels 125a having different communication settings, such as the maximum time allowed for transmission.

[0030] The transmission data processed by the first protocol using the first entity is distributed to one of the multiple communication channels 125a by the second entity 122a. That is, the second entity 122a selects one communication channel 125a from the multiple communication channels 125a depending on the state of the transmission data, such as the delay time allowed for each transmission data and the number of transmissions (initial transmission or retransmission) for each transmission data. At this time, the second entity 122a selects the communication channel 125a suitable for the state of the transmission data, and notifies the third entity 123a of the selected communication channel 125a.

[0031] The transmission data is then subjected to processing of the third protocol using the third entity 123a, and is then assigned to the communication channel 125a selected by the second entity 122a and sent to the fourth entity 124a. A transmission packet is then generated by processing of the fourth protocol using the fourth entity 124a, and the transmission packet is wirelessly transmitted from the wireless communication unit 140 (or the wireless communication unit 210).

[0032] In this way, a communication channel associated with the third entity is selected depending on the state of the transmitted data, and the data is transmitted via a communication channel with communication settings suitable for the requirements of the data, thereby making it possible to flexibly control, for example, the arrival time of data at the receiving end.

[0033] As described above, according to this embodiment, a plurality of communication channels with different communication settings corresponding to the requirements of data transmitted by a radio bearer are configured, and a communication channel is selected according to the state of the data to perform data communication. Therefore, data can be transmitted using a communication channel suited to the state of the transmission data, such as the allowable delay time for each transmission data or the number of transmissions (initial transmission or retransmission) for each transmission data, and the arrival time of data can be flexibly controlled.

[0034] In the conventional layer structure, the structure of the communication protocol belonging to layer 2 is rigid, and one set of protocol stacks is associated with one radio bearer, making it difficult to flexibly control to guarantee the arrival time of data. In the layer structure of the present embodiment, multiple sets of communication channels are associated with one radio bearer, which has the special effect of facilitating flexible control to guarantee the arrival time of data.

[0035] The protocol stack of this embodiment can be applied to both one-way and two-way communications, regardless of whether it is uplink or downlink communications.

[0036] (Embodiment 2) The configurations of the base station device and the terminal device according to the second embodiment are similar to those of the base station device 100 and the terminal device 200 according to the first embodiment, and therefore the description thereof will be omitted. The second embodiment is also an embodiment that embodies the first embodiment. In the second embodiment, the configuration of the processor 120 (or the processor 220) is more detailed than that in the first embodiment.

[0037] Fig. 5 is a block diagram showing a configuration of the processor 120 according to the embodiment 2. The processor 220 of the terminal device 200 also has a similar configuration to the processor 120 shown in Fig. 5. The processor 120 shown in Fig. 5 has a Service Data Adaptation Protocol (SDAP) processing unit 151, a Packet Data Convergence Protocol (PDCP) processing unit 152, a Radio Link Control (RLC) processing unit 153, and a Medium Access Control (MAC) processing unit 154.

[0038] The SDAP processing unit 151 configures an SDAP entity, which is an entity of the SDAP layer, for each radio bearer, and executes SDAP layer processing on transmission data using the SDAP entity.

[0039] The PDCP processing unit 152 configures a PDCP entity, which is a PDCP layer entity, for each radio bearer, and uses the PDCP entity to execute PDCP layer processing on the transmission data that has been subjected to SDAP layer processing. The PDCP entity configured by the PDCP processing unit 152 selects one LCH from multiple logical channels (LCHs) associated with the RLC entity in the RLC processing unit 153, depending on, for example, the requirements of the transmission data.

[0040] The RLC processing unit 153 configures an RLC entity, which is an entity of the RLC layer, for each radio bearer, and executes RLC layer processing for the transmission data that has been subjected to PDCP layer processing, using the RLC entity. The RLC entity configured by the RLC processing unit 153 is associated with a plurality of LCHs each having a different communication setting, and the RLC entity assigns the transmission data to the LCH selected by the PDCP entity.

[0041] The MAC processing unit 154 configures a MAC entity, which is an entity of the MAC layer, for each radio bearer, and executes MAC layer processing on the transmission data that has been subjected to RLC layer processing, using the MAC entity. The MAC entity configured by the MAC processing unit 154 outputs a transmission packet obtained by performing MAC layer processing to the wireless communication unit 140, and transmits it wirelessly.

[0042] Next, a transmission method for each radio bearer according to the second embodiment will be described with reference to Fig. 6. The transmission method described below is executed by the base station apparatus 100 shown in Fig. 1 or the terminal apparatus 200 shown in Fig. 3.

[0043] In this embodiment, when a radio bearer is established, an SDAP entity, a PDCP entity, an RLC entity, and a MAC entity corresponding to the radio bearer are configured by the processor 120 (or the processor 220). In Fig. 6, an SDAP entity 310, a PDCP entity 320, an RLC entity 330, and a MAC entity 340 are illustrated. The RLC entity 330 is accompanied by LCHs 331-334 each having a different communication setting, and HARQs 351-354 and component carriers (CCs) 361-364 correspond to the LCHs 331-334, respectively.

[0044] The transmission data undergoes SDAP layer processing using SDAP entity 310 and is sent to PDCP entity 320. The transmission data undergoes PDCP layer processing using PDCP entity 320 and is assigned to one of four LCHs 331-334. For example, PDCP entity 320 selects LCHs 331-334 to which transmission data is to be allocated, depending on the time when the transmission data arrives at PDCP entity 320 and the delay time allowed for each piece of transmission data. PDCP entity 320 may also select LCHs 331-334 to which transmission data is to be allocated, depending on whether the transmission data is data to be transmitted for the first time or data to be retransmitted, etc. Alternatively, an LCH may be selected by the method disclosed in the above first embodiment, for example.

[0045] Even when transmission data is transmitted by one radio bearer, the time at which the data arrives at PDCP entity 320 varies on a packet-by-packet basis due to, for example, variations in processing time in the application layer and variations in transmission delay from the core network (jitter or burst spread). Furthermore, when a radio transmission error occurs in the transmission data, retransmission is necessary, resulting in a delay. For PDCP entity 320, retransmission is equivalent to variations in arrival time. For this reason, PDCP entity 320 distributes transmission data on a packet-by-packet basis to LCHs 331-334. That is, when controlling the arrival time of data at the receiving side, the delay time allowed for a packet, such as PDB (Packet Delay Budget), differs depending on the time the data arrives at PDCP entity 320, and therefore LCHs 331-334 appropriate for the delay time of each packet are selected.

[0046] For example, in the terminal device 200, the four LCHs 331 to 334 are set with different maxPUSCH-Duration values. The maxPUSCH-Duration is a parameter indicating the maximum time allowed until data is transmitted. Here, it is assumed that the LCHs 331, 332, 333, and 334 are set with the largest maxPUSCH-Duration in this order. The PDCP entity 320 selects, for example, the LCH 331 with the largest maxPUSCH-Duration for a packet that arrives early, the LCH 332 with the second largest maxPUSCH-Duration for a packet that arrives on time, the LCH 333 with the third largest maxPUSCH-Duration for a packet that arrives late, and the LCH 334 with the fourth largest maxPUSCH-Duration for a packet that arrives close to a deadline. Then, the PDCP entity 320 notifies the RLC entity 330 of the selected LCHs 331 to 334.

[0047] Furthermore, the PDCP entity 320 may select an LCH 331-334 depending on whether the transmission data is an initial transmission packet or a retransmission packet. For example, the correspondence between the number of times a packet is transmitted and the selected LCH may be as shown in Fig. 7. As shown in Fig. 7, the four LCHs 331-334 are assigned LCIDs, which are identification information for identifying the respective LCHs 331-334. Here, it is assumed that LCID "a" is assigned to LCH 331, LCID "b" is assigned to LCH 332, LCID "c" is assigned to LCH 333, and LCID "d" is assigned to LCH 334. The maxPUSCH-Duration of LCH 331 with LCID "a" is a large value, the maxPUSCH-Duration of LCH 332 with LCID "b" is a normal value, the maxPUSCH-Duration of LCH 333 with LCID "c" is a small value, and the maxPUSCH-Duration of LCH 334 with LCID "d" is the minimum value. In this way, in the terminal device 200, the communication settings of the multiple communication channels are different, for example, the maxPUSCH-Duration.

[0048] For example, the PDCP entity 320 selects LCHs 331, 332 with LCIDs of "a" or "b" for an initial transmission packet, and selects LCHs 333, 334 with LCIDs of "c" or "d" for a retransmission packet. Then, the PDCP entity 320 notifies the RLC entity 330 of the selected LCHs 331-334.

[0049] The distribution of packets to each of the LCHs 331 to 334 can be realized by using a split function or a routing function of the PDCP layer. That is, in the base station device 100, packets can be distributed to each of the LCHs 331 to 334 by using a split function of the PDCP layer for distributing packets to other base station devices when multiple access is performed, for example. In addition, in the terminal device 200, packets can be distributed to each of the LCHs 331 to 334 by using a routing function of the PDCP layer for distributing packets to multiple cells when multiple access is performed, for example. Note that the distribution of packets to the LCHs 331 to 334 does not necessarily have to be performed in the PDCP layer, and may be performed in the SDAP layer, for example.

[0050] The transmission data distributed to the LCHs 331-334 undergoes RLC layer processing using the RLC entity 330, and is then assigned to each of the LCHs 331-334 and sent to the MAC entity 340. Then, transmission packets are generated by performing MAC layer processing using the MAC entity 340, retransmission settings are made for the transmission packets according to the HARQs 351-354 corresponding to the LCHs 331-334, and the transmission packets are wirelessly transmitted from the wireless communication unit 140 (or the wireless communication unit 210) by the CCs 361-364 corresponding to the LCHs 331-334.

[0051] The retransmission settings in the HARQs 351 to 354 may be different for the corresponding LCHs 331 to 334. For example, the HARQ 351 of the LCH 331 that allocates a packet with an early arrival time may be set to execute a retransmission process using ACK and NACK since there is a time margin, whereas the HARQ 354 of the LCH 334 that allocates a packet whose arrival time is close to the deadline may be set not to execute a retransmission process since there is no time margin, so that the radio resources may be given to other traffic. Furthermore, since the CCs 361 to 364 have different radio qualities, they may be associated with the LCHs 331 to 334 according to their radio qualities. For example, the LCH 331 that allocates a packet with an early arrival time may be associated with the CC 361 with a relatively low radio quality, whereas the LCH 334 that allocates a packet whose arrival time is close to the deadline may be associated with the CC 364 with a relatively high radio quality. Furthermore, the LCH that allocates a packet with a later arrival time may be associated with a CC that is expected to transmit with a low delay. In this case, for example, the LCH 334 to which a packet whose arrival time is approaching the deadline is assigned may be associated with the CC 364 in the millimeter wave band.

[0052] In this way, an LCH associated with an RLC entity is selected depending on conditions such as the allowable delay time of the transmitted data, and the data is transmitted via an LCH with communication settings suitable for the requirements of the data, making it possible to flexibly control, for example, the arrival time of data at the receiving side.

[0053] As described above, according to the present embodiment, a plurality of LCHs having different communication settings corresponding to the requirements of data transmitted by a radio bearer are configured, and an LCH is selected according to the state of the data to perform data communication. Therefore, data can be transmitted using an LCH suitable for the state of the transmission data, such as the delay time allowed for each transmission data, and the arrival time of the data can be flexibly controlled.

[0054] In addition, PDCP duplication, which duplicates packets in the PDCP layer, may be used in combination. In this case, for example, as shown in Fig. 8, RLC entities 330 and LCHs 331-334 are added according to the packets to be duplicated. That is, a plurality of RLC entities 330 are configured according to the packets to be duplicated, and a plurality of HARQs 351-354 and CCs 361-364 corresponding to the LCHs 331-334 are set. As a result, the duplicated packets are transmitted in different radio environments, thereby improving reliability.

[0055] (Embodiment 3) The configurations of the base station device and terminal device according to the third embodiment are similar to the base station device 100 and terminal device 200 according to the first embodiment, and therefore the description thereof will be omitted. Also, the configuration of the processor according to the third embodiment is similar to the configuration of the processor 120 according to the second embodiment, and therefore the description thereof will be omitted. In the third embodiment, the allocation of CCs to packets is different from the first and second embodiments. The third embodiment is also an embodiment that embodies the above-mentioned first embodiment.

[0056] Fig. 9 is a diagram showing a transmission method for each radio bearer according to embodiment 3. In Fig. 9, the same parts as in Fig. 6 are denoted by the same reference numerals.

[0057] In this embodiment, as in the second embodiment, when a radio bearer is established, an SDAP entity, a PDCP entity, an RLC entity, and a MAC entity corresponding to the radio bearer are configured by the processor 120 (or the processor 220). In Fig. 9, an SDAP entity 310, a PDCP entity 320, an RLC entity 330, and a MAC entity 340 are illustrated. The RLC entity 330 is accompanied by LCHs 331-334 each having a different communication setting, and HARQs 351-354 and partial bands (BWPs: BandWidth Parts) 411-414 of a CC 410 correspond to the LCHs 331-334, respectively.

[0058] The transmission data undergoes SDAP layer processing using SDAP entity 310 and is sent to PDCP entity 320. The transmission data undergoes PDCP layer processing using PDCP entity 320 and is assigned to one of four LCHs 331-334 associated with RLC entity 330. For example, PDCP entity 320 selects LCHs 331-334 to which the transmission data is to be assigned according to the time at which the transmission data arrives at PDCP entity 320 and the allowable delay time for each piece of transmission data, and notifies RLC entity 330 of the selected LCH 331. Alternatively, an LCH can be selected using the method disclosed in the above first embodiment, for example.

[0059] Then, the transmission data undergoes RLC layer processing using the RLC entity 330, and is then assigned to the LCHs 331-334 notified by the PDCP entity 320 and sent to the MAC entity 340. Then, transmission packets are generated by performing MAC layer processing using the MAC entity 340, and retransmission settings are made for the transmission packets in accordance with the HARQs 351-354 corresponding to the LCHs 331-334, and the transmission packets are wirelessly transmitted from the wireless communication unit 140 (or the wireless communication unit 210) by the BWPs 411-414 corresponding to the LCHs 331-334.

[0060] Since the BWPs 411-414 have different wireless qualities, they may be associated with the LCHs 331-314 according to their wireless qualities. For example, the LCH 311 that allocates packets with early arrival times may be associated with the BWP 411 with relatively low wireless quality, while the LCH 314 that allocates packets whose arrival times are close to a deadline may be associated with the BWP 414 with relatively high wireless quality. Furthermore, the subcarrier spacing (SCS) of the BWPs 411-414 for each of the LCHs 311-314 may be set differently, and the characteristics of the BWPs 411-414 may be controlled.

[0061] In this way, an LCH associated with an RLC entity is selected according to conditions such as the allowable delay time of transmitted data, and data is transmitted by an LCH with communication settings suitable for the requirements of the data, so that, for example, the arrival time of data at the receiving side can be flexibly controlled. Also, since each LCH corresponds to multiple BWPs included in one CC, the number of CCs used to transmit data can be reduced, thereby reducing power consumption.

[0062] As described above, according to the present embodiment, a plurality of LCHs having different communication settings corresponding to the requirements of data transmitted by a radio bearer are configured, and an LCH is selected according to the state of the data to perform data communication. Therefore, data can be transmitted using an LCH suitable for the state of the transmission data, such as the delay time allowed for each transmission data, and the arrival time of the data can be flexibly controlled. In addition, since the LCH is associated with the BWP, the number of CCs used for transmitting data can be reduced, thereby reducing power consumption.

[0063] In the above first to third embodiments, a transmission method when data is transmitted between the base station device 100 and the terminal device 200 has been described. However, the present invention can also be applied to a case where multiple access is performed in which data is transmitted between a plurality of base station devices and a terminal device. Therefore, a transmission method by a plurality of base station devices when multiple access is performed will be described below. Note that the protocol stack according to each embodiment can be applied to both one-way communication and two-way communication, regardless of whether it is uplink communication or downlink communication. In the following description, it should be noted that if the base station device and the terminal device are reversed and functions related to multiple access are integrated and implemented in one terminal device, the following operations can be described as operations of the terminal device.

[0064] When multiple access is performed, for example, two base station devices are connected to one terminal device. At this time, a radio bearer that is divided between two base station devices is established. For example, as shown in Fig. 10, the radio bearer is divided between a master base station device 100a and a secondary base station device 100b. In Fig. 10, the same reference numerals are used for the same parts as in Fig. 6.

[0065] When a radio bearer is established, an SDAP entity 310, a PDCP entity 320, an RLC entity 330a, and a MAC entity 340a corresponding to the radio bearer are configured in the master base station device 100a. The radio bearer is separated in the PDCP entity 320, and an RLC entity 330b and a MAC entity 340b are configured in the secondary base station device 100b. An LCH 331 is associated with the RLC entity 330a of the master base station device 100a, and a plurality of LCHs 332 to 334 whose communication settings are different from the LCH 331 and different from each other are associated with the RLC entity 330b of the secondary base station device 100b.

[0066] The transmission data undergoes SDAP layer processing using the SDAP entity 310 and is sent to the PDCP entity 320. The transmission data undergoes PDCP layer processing using the PDCP entity 320 and is assigned to one of the four LCHs 331-334. The PDCP entity 320 selects one of the LCHs 331-334 to which the transmission data is to be assigned, for example, according to the time when the transmission data arrives at the PDCP entity 320 and the delay time allowed for each transmission data, and notifies the RLC entity 330a or the RLC entity 330b to which the selected LCH is associated. At this time, the LCH 331 is associated with the RLC entity 330a of the master base station device 100a, while the LCHs 332-334 are associated with the RLC entity 330b of the secondary base station device 100b. However, by using a split function of the PDCP layer, it is possible to assign packets between separate base station devices.

[0067] The transmission data allocated to the LCHs 331 to 334 undergoes RLC layer processing using the RLC entity 330a or the RLC entity 330b, and is then assigned to the LCHs 331 to 334 notified by the PDCP entity 320 and sent to the MAC entity 340a or the MAC entity 340b. Then, a transmission packet is generated by performing MAC layer processing using the MAC entity 340a or the MAC entity 340b, and the transmission packet is wirelessly transmitted from the master base station device 100a or the secondary base station device 100b. That is, the data allocated to the LCH 331 is transmitted from the master base station device 100a, and the data allocated to the LCHs 332 to 334 is transmitted from the secondary base station device 100b.

[0068] In the example shown in Fig. 10, the LCH 331 is associated with the RLC entity 330a of the master base station device 100a, and the LCHs 332 to 334 are associated with the RLC entity 330b of the secondary base station device 100b, but the LCHs configured in each base station device are not limited to the above. That is, for example, the LCHs 331 and 332 may be configured in the master base station device 100a, and the LCHs 333 and 334 may be configured in the secondary base station device 100b, or the LCHs 331 to 333 may be configured in the master base station device 100a, and the LCH 334 may be configured in the secondary base station device 100b. In short, it is sufficient that some of the multiple LCHs are configured in the master base station device 100a, and the remaining LCHs are configured in the secondary base station device 100b.

[0069] In addition, the above-mentioned embodiments can be appropriately combined and implemented. For example, PDCP duplication may be applied to packets distributed to the master base station device 100a and the secondary base station device 100b, or three BWPs included in one CC may be associated with three LCHs configured in the secondary base station device 100b. [Explanation of symbols]

[0070] 110 Network Interface 120, 220 processor 121 First Protocol Processing Unit 122 Second Protocol Processing Unit 122a Second Entity 123 3rd Protocol Processing Unit 123a Third Entity 124 4th Protocol Processing Unit 124a Fourth Entity 125a Communication Channel 130, 230 Memory 140, 210 Wireless communication section 151 SDAP processing section 152 PDCP Processing Unit 153 RLC processing section 154 MAC processing unit

Claims

1. A control unit capable of configuring an entity for processing data transmitted by a first radio bearer among a plurality of radio bearers, configuring a plurality of communication channels for the first radio bearer with different communication settings for each requirement of the data, selecting one communication channel that satisfies the requirements of the data to be transmitted from the plurality of communication channels according to the state of the data to be transmitted, and controlling the implementation of data communication with an opposing wireless communication device. A wireless communication device comprising:

2. The control unit is a first protocol processing unit constituting a first entity that performs processing of a first protocol on data transmitted by the first radio bearer; A second protocol processing unit constituting a second entity that executes processing of a second protocol on the data; a third protocol processing unit constituting a third entity that executes processing of a third protocol on the data, the third entity being associated with a plurality of communication channels each having a different communication setting; The second entity is Selecting a communication channel having a communication setting corresponding to a state of the data to be transmitted, and notifying the third entity of the selected communication channel; The third entity is The data to be transmitted is assigned to the communication channel notified by the second entity.

2. The wireless communication device according to claim 1.

3. The second entity is A communication channel is selected according to a time when the data to be transmitted arrives at the second entity and an allowable delay time for the data to be transmitted.

3. The wireless communication device according to claim 2.

4. The second entity is Selecting a communication channel according to the number of times the data to be transmitted is to be transmitted 3. The wireless communication device according to claim 2.

5. 3. The wireless communication device according to claim 2, wherein the first protocol is a Service Data Adaptation Protocol (SDAP).

6. 3. The wireless communication device according to claim 2, wherein the second protocol is Packet Data Convergence Protocol (PDCP).

7. 3. The wireless communication device according to claim 2, wherein the third protocol is RLC (Radio Link Control).

8. The control unit is Further comprising a fourth protocol processing unit constituting a fourth entity that executes processing of a fourth protocol on the data, The fourth entity is A retransmission setting for the data to be transmitted is performed according to a communication channel to which the data to be transmitted is assigned.

3. The wireless communication device according to claim 2.

9. a wireless transmission unit that transmits the data to be transmitted to the wireless communication device; The wireless transmission unit is The data to be transmitted is transmitted using a carrier wave of a frequency band corresponding to a communication channel to which the data to be transmitted is assigned.

2. The wireless communication device according to claim 1.

10. A control unit capable of configuring an entity for processing data transmitted by a first radio bearer of a plurality of radio bearers in response to control of an opposing wireless communication device, configuring a plurality of communication channels for the first wireless bearer with different communication settings for each requirement of the data, selecting one communication channel that satisfies the requirements of the data to be transmitted from the plurality of communication channels in response to a state of the data to be transmitted, and controlling implementation of data communication with the opposing wireless communication device. A wireless communication device comprising:

11. A wireless communication system having a first wireless communication device and a second wireless communication device opposite the first wireless communication device, The first wireless communication device is A control unit capable of configuring an entity for processing data transmitted by a first radio bearer among a plurality of radio bearers, configuring a plurality of communication channels for the first radio bearer with different communication settings for each requirement of the data, selecting one communication channel that satisfies the requirements of the data to be transmitted from the plurality of communication channels according to the state of the data to be transmitted, and controlling the implementation of data communication with a counterpart wireless communication device. A wireless communication system comprising:

12. 1. A method of transmission performed by a wireless communication device, comprising: An entity that performs processing of a predetermined protocol on data transmitted by a first radio bearer among a plurality of radio bearers is configured, and a plurality of communication channels associated with the entity and having different communication settings for each requirement of the data are configured for the first radio bearer; selecting one communication channel that satisfies a requirement of the data to be transmitted from among the plurality of communication channels according to a state of the data to be transmitted; The selected communication channel is used to control data communication with the opposing wireless communication device.

23. A method for transmitting a signal comprising the steps of:

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