Wireless stations and communication systems

Abstract

A control section sets a channel group, which is a plurality of channels aggregated, and first information related to the aggregated channel, and controls so that a transmission opportunity of a first signal is generated based on a data amount of the aggregated channel and the first information, and controls so that a transmission opportunity of a second signal, which is used to request an uplink resource of the first signal, is generated in response to the transmission opportunity of the first signal. A communication section transmits the second signal to another wireless station in response to the transmission opportunity of the second signal, and receives a radio resource from the other wireless station.

Description

TECHNICAL FIELD

[0001] The present application relates to a wireless station and a communication system. BACKGROUND

[0002] In the current network, the traffic volume of mobile terminals (smartphones or feature phones) occupies a large portion of the network resources. Furthermore, the traffic volume used by mobile terminals is in a trend of expansion in the future.

[0003] On the other hand, with the development of IoT (Internet of things) services (for example, monitoring systems of traffic systems, smart meters, devices, and the like), services with various requirements are required to be addressed. Therefore, in the communication standards of the 5th generation mobile communication (5G or NR (New Radio)), in addition to the standard technologies of 4G (4th generation mobile communication) (for example, Non-Patent Literatures 1 to 11), technologies for further high data rate, large capacity, and low latency are required to be achieved.

[0004] In addition, regarding the 5th generation communication standards, technical discussions are being conducted in the working committees (for example, TSG-RAN WG1, TSG-RAN WG2, and the like) of the 3GPP (Third Generation Partnership Project). (Non-Patent Literatures 12 to 40).

[0005] As described above, in order to address various services, in 5G, support of more use cases classified into eMBB (Enhanced Mobile Broad Band), Massive MTC (Machine Type Communications), and URLLC (Ultra-Reliable and Low Latency Communication) is expected.

[0006] When a terminal device such as a mobile terminal performs communication, the terminal device requests allocation of a radio resource to a base station device. The base station device allocates a radio resource in accordance with the request of the terminal device and notifies the terminal device. Then, the terminal device transmits data to the base station device using the allocated radio resource.

[0007] In addition, not only the communication between the terminal device and the base station device, but also V2X is the same. In this case, communication is implemented between the terminal device and other terminal devices.

[0008] Hereinafter, communication between a terminal device and a base station device is described for convenience, but the devices that perform communication are not limited thereto. For example, it can be applied to communication between terminal devices such as V2X. In this case, for example, "base station device" is replaced with "other terminal device".

[0009] As a technology related to 5G, the following prior art document is described.

[0010] Prior art document

[0011] Non-patent literature

[0012] NPL 1: 3GPP TS 36.211 V16.0.0 (2019-12) NPL 2: 3GPP TS 36.212 V16.0.0 (2019-12) NPL 3: 3GPP TS 36.213 V16.0.0 (2019-12) NPL 4: 3GPP TS 36.300 V16.0.0 (2019-12) NPL 5: 3GPP TS 36.321 V15.8.0 (2019-12) NPL 6: 3GPP TS 36.322 V15.3.0 (2019-09) NPL 7: 3GPP TS 36.323 V15.5.0 (2019-12) NPL 8: 3GPP TS 36.331 V15.8.0 (2019-12) NPL 9: 3GPP TS 36.413 V16.0.0 (2019-12) NPL 10: 3GPP TS 36.423 V16.0.0 (2019-12) NPL 11: 3GPP TS 36.425 V15.0.0 (2018-06) NPL 12: 3GPP TS 37.340 V16.0.0 (2019-12) NPL 13: 3GPP TS 38.201 V16.0.0 (2019-12) NPL 14: 3GPP TS 38.202 V16.0.0 (2019-12) NPL 15: 3GPP TS 38.211 V16.0.0 (2019-12) NPL 16: 3GPP TS 38.212 V16.0.0 (2019-12) NPL 17: 3GPP TS 38.213 V16.0.0 (2019-12) NPL 18: 3GPP TS 38.214 V16.0.0 (2019-12) NPL 19: 3GPP TS 38.215 V16.0.1 (2020-01) NPL 20: 3GPP TS 38.300 V16.0.0 (2019-12) NPL 21: 3GPP TS 38.321 V15.8.0 (2019-12) NPL 22: 3GPP TS 38.322 V15.5.0 (2019-03) NPL 23: 3GPP TS 38.323 V15.6.0 (2019-06) NPL 24: 3GPP TS 38.331 V15.8.0 (2019-12) NPL 25: 3GPP TS 38.340 V0.1.1 (2019-11)

[0013] NPL 26: 3GPP TS 38.401 V16.0.0 (2019-12)

[0014] Non-Patent Literature 27: 3GPP TS 38.410 V16.0.0 (2019-12)

[0015] Non-Patent Literature 28: 3GPP TS 38.413 V16.0.0 (2019-12)

[0016] Non-Patent Literature 29: 3GPP TS 38.420 V15.2.0 (2018-12)

[0017] Non-Patent Literature 30: 3GPP TS 38.423 V16.0.0 (2019-12)

[0018] Non-Patent Literature 31: 3GPP TS 38.470 V16.0.0 (2019-12)

[0019] Non-Patent Literature 32: 3GPP TS 38.473 V16.0.0 (2019-12)

[0020] Non-Patent Literature 33: 3GPP TR 38.801 V14.0.0 (2017-03)

[0021] Non-Patent Literature 34: 3GPP TR 38.802 V14.2.0 (2017-09)

[0022] Non-Patent Literature 35: 3GPP TR 38.803 V14.2.0 (2017-09)

[0023] Non-Patent Literature 36: 3GPP TR 38.804 V14.0.0 (2017-03)

[0024] Non-Patent Literature 37: 3GPP TR 38.900 V15.0.0 (2018-06)

[0025] Non-Patent Literature 38: 3GPP TR 38.912 V15.0.0 (2018-06)

[0026] Non-Patent Literature 39: 3GPP TR 38.913 V15.0.0 (2018-06)

[0027] Non-Patent Literature 40: 3GPP TR 37.324 V15.1.0 (2018-09)

[0028] Patent Literature

[0029] Patent Literature 1: Japanese Patent Application Laid-Open No. 2019-180098

[0030] Patent Literature 2: Japanese Patent Application Laid-Open No. 2020-501441 SUMMARY

[0031] PROBLEMS TO BE SOLVED BY THE INVENTION

[0032] However, the number of times of requesting allocation of radio resources and the number of times of allocation of radio resources increase when the terminal device frequently occurs an opportunity to transmit data, in other words, signalling increases. The consumption power of the terminal device also increases when the message is transmitted and received at the time of allocation of radio resources. Further, for example, in the case where the terminal device is in a power saving state (sleep state, intermittent reception state) or the like, the consumption power of the terminal device increases due to repeated release of the power saving state.

[0033] Therefore, one embodiment of the present disclosure provides a wireless station and a communication system that suppress an increase in signalling or suppress consumption power in allocation of radio resources.

[0034] MEANS FOR SOLVING THE PROBLEMS

[0035] The wireless station has a control section configured to set an aggregated channel that is a group of channels obtained by aggregating a plurality of channels and first information related to the aggregated channel, and perform control so that a transmission opportunity of a second signal for requesting an uplink resource of a first signal is generated in accordance with a data amount of the aggregated channel and the first information, and a communication section configured to transmit the second signal to another wireless station in accordance with the transmission opportunity of the second signal, and receive a radio resource from the another wireless station. Further, the communication section receives a third signal from the another wireless station in accordance with the second signal, and transmits transmission data in accordance with the third signal. Note that the same means can be applied in the case where not "a plurality of channels" but "one channel". Therefore, hereinafter, for convenience, the case where "a plurality of channels" are aggregated is described, but the same applies to the case where one channel.

[0036] EFFECT OF THE INVENTION

[0037] Therefore, one embodiment of the present disclosure can suppress an increase in signalling or suppress consumption power in allocation of radio resources. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a diagram illustrating a configuration example of a communication system 1.

[0039] Figure 2 is a diagram illustrating a configuration example of a communication system 30.

[0040] Figure 3 is a diagram illustrating a configuration example of a terminal device 100.

[0041] Figure 4Fig. 1 is a diagram showing a configuration example of a base station device 200.

[0042] Figure 5 Fig. 2 is a diagram showing an example of a timing of a radio resource allocation process.

[0043] Figure 6 Fig. 3 is a diagram showing an example of an aggregated LCH.

[0044] Figure 7 Fig. 4 is a diagram showing an example of a processing flowchart of an aggregated LCH control process S100.

[0045] Figure 8 Fig. 5 is a diagram showing an example of a timing of a radio resource allocation process.

[0046] Figure 9 Fig. 6 is a diagram showing an example of a processing flowchart of a separate LCH control process S201.

[0047] Figure 10 Fig. 7 is a diagram showing an example of a timing of a radio resource allocation process.

[0048] Figure 11 Fig. 8 is a diagram showing an example of a processing flowchart of a separate LCH control process S301.

[0049] Figure 12 Fig. 9 is a diagram showing an example of a timing of a radio resource allocation process when an aggregated LCH guard timer expires.

[0050] Figure 13 Fig. 10 is a diagram showing an example of a usage method for a radio resource allocated to a separate LCH.

[0051] Figure 14 Fig. 11 is a diagram showing an example of a usage method for a radio resource allocated to an aggregated LCH. DETAILED DESCRIPTION

[0052] Hereinafter, the present embodiment will be described in detail with reference to the drawings. The problems and examples in the present specification are only examples, and do not limit the scope of the present application. In particular, even if the described expressions are different, as long as they are technically equivalent, different expressions can also apply the technology of the present application, and do not limit the scope of the rights.

[0053] [1st Embodiment]

[0054] The 1st embodiment will be described.

[0055] Figure 1is a diagram showing a configuration example of a communication system 1. The communication system 1 is configured of a wireless station 10 and other wireless stations 20. The wireless station 10 is wirelessly connected with the other wireless stations 20, and performs communication. The other wireless stations 20 allocate uplink radio resources in response to a request from the wireless station 10.

[0056] The wireless station 10 has a control section 12 and a communication section 11. The control section 12 and the communication section 11 are constructed, for example, by a processor of the wireless station 10 executing a program. Further, the wireless station 10 sets an aggregated channel 13 which is a channel group obtained by bundling (aggregating) a plurality of channels corresponding to respective data. The aggregated channel 13, for example, aggregates a plurality of channels of channel 1 to channel n (n is an integer). Further, the wireless station 10 sets first information relating to the aggregated channel 13. The setting of the aggregated channel and the setting relating to aggregation such as the first information are set using a control signal transmitted from the other wireless stations 20 to the wireless station 10.

[0057] The control section 12 performs control in such a manner that, when data to be transmitted to the other wireless stations 20 is generated, a transmission opportunity of a first signal can be generated (triggered) in accordance with a transmission data amount (an accumulated data amount) of the aggregated channel and the first information.

[0058] The control section 12 generates (triggers) a transmission opportunity of a second signal which requests an uplink resource of the first signal in response to generation (triggering) of the transmission opportunity of the first signal.

[0059] The communication section 11 transmits the second signal to the other wireless stations 20 in response to generation (triggering) of the transmission opportunity of the second signal. Also, a third signal is received from the other wireless stations 20, and transmission data is transmitted to the other wireless stations in accordance with the third signal.

[0060] Note that, in a case where not "a plurality of channels" but "one channel" is used, the same means can be applied. For example, a plurality of data having different quality of service (QoS) are sometimes multiplexed with respect to one channel.

[0061] The control section 12 performs classification with respect to respective data which are multiplexed in one channel. For example, classification can be performed in accordance with QoS. An arbitrary header in the data is analyzed, and hierarchical division is performed for each QoS, and the data is classified into a plurality of QoS levels of QoS level 1 to QoS level n (n is an integer). Then, each QoS level is associated with a virtual n channels. Also, a channel group obtained by bundling (aggregating) a plurality of channels can be set as the aggregated channel 13.

[0062] The QoS is, for example, a requirement condition related to communication performance such as throughput, delay time, loss rate, and the like of data. It can be end-to-end communication performance, or communication performance of a wireless access section. In a case where data is difficult to satisfy the communication performance, control that sets a higher QoS and is able to satisfy the communication performance is performed.

[0063] The classification is not limited to this. For example, it can also be classified according to the category / genre of data. For example, it can be classified according to whether the data is important data for communication control or other data. Further, for example, it can also be classified according to an LCG (Logical Channel Group) (see Non-Patent Literature 21).

[0064] The control section 12 generates (triggers) a transmission opportunity of the second signal that requests the uplink resource of the first signal in response to generation (triggering) of a transmission opportunity of the first signal.

[0065] The communication section 11 transmits the second signal to the other wireless station apparatus 20 in response to generation (triggering) of a transmission opportunity of the second signal. Also, the third signal is received from the other wireless station, and the transmission data is transmitted to the other wireless station in accordance with the third signal.

[0066] In the present embodiment, in the allocation of the wireless resource, the generation of the first signal and the second signal is performed in accordance with the aggregated channel, and thus, compared to a case where the first signal and the second signal are generated in accordance with each channel, an effect of suppressing an increase in signaling or suppressing power consumption of the terminal apparatus is exerted.

[0067] [Second Embodiment]

[0068] The second embodiment will be described. In the following description, the terminal apparatus and the base station apparatus are sometimes referred to as a wireless station or the other wireless station. For example, the apparatus of one party is sometimes referred to as a wireless station, and the apparatus of the other party is sometimes referred to as the other wireless station.

[0069] Figure 2 is a diagram showing a structure example of a communication system 30.

[0070] The communication system 30 has a terminal apparatus 100, a base station apparatus 200, and a core network 300. The communication system 30 is a system in which the terminal apparatus 100 communicates with the other communication apparatus on the core network 300 via the base station apparatus 200.

[0071] The terminal apparatus 100 is wirelessly connected to the base station apparatus 200, and communicates. The terminal apparatus 100 requests the base station apparatus 200 for allocation of a wireless resource when a transmission opportunity of data occurs.

[0072] The base station device 200 is a communication device that relays communication between the terminal device 100 and other devices. The base station device 200 manages a radio resource for uplink data of the terminal device 100. In addition, the base station device 200 can also manage a radio resource for uplink and downlink data.

[0073] The core network 300 is, for example, a network that communicates using an IP (Internet Protocol) address. The core network is, for example, the Internet or a local network.

[0074] In the communication system 30, the terminal device 100 transmits a scheduling request (SR) to the base station device 200 in an allocation step of a radio resource. This step is referred to as an SR procedure. The base station device 200, upon receiving the SR, transmits an UL grant (uplink transmission grant) that permits uplink data transmission of the terminal device 100 to the terminal device 100. The terminal device 100, upon receiving the UL grant, transmits, for example, a buffer status report (BSR) that contains information about the amount of data to be transmitted. The base station device 200 that receives the BSR allocates a radio resource for uplink data transmission to the terminal device 100 in accordance with the information about the amount of data to be transmitted, and transmits an UL grant that notifies the allocated radio resource to the terminal device 100. The terminal device 100 transmits uplink data to the base station device 200 in accordance with the notified radio resource.

[0075] In the communication system 30, the terminal device 100 can determine whether to transmit a BSR in accordance with the amount of accumulated data of an aggregated LCH (Logical Channel). The aggregated LCH is constituted by a plurality of individual LCHs. The amount of accumulated data indicates, for example, the amount of data that is not transmitted (data that is generated as data to be transmitted but has not been transmitted) to the base station device 200. Alternatively, it is referred to as "Data Available Transmission" in the technical field.

[0076] <Structure of the terminal device 100>

[0077] Figure 3 Fig. 1 is a diagram that shows a structure example of the terminal device 100. The terminal device 100 has a CPU (Central Processing Unit) 110, a storage 120, a memory 130, and a communication circuit 140.

[0078] The storage 120 is a storage device such as a flash memory, an HDD (Hard Disk Drive), or an SSD (Solid Sate Drive) that stores programs and data. The storage 120 stores an aggregated LCH control program 121, a separate LCH control program 122, an aggregated LCH radio resource allocation program 123, a separate LCH radio resource allocation program 124, and a data transmission program 125.

[0079] The memory 130 is a region in which programs stored in the storage 120 are loaded. In addition, the memory 130 can also be used as a region in which program storage data is stored.

[0080] The communication circuit 140 is a circuit that wirelessly connects with a base station device and performs communication. The communication circuit 140 is, for example, a network interface card.

[0081] The CPU 110 is a processor that loads programs stored in the storage 120 to the memory 130, executes the loaded programs, constructs each section, and implements each process.

[0082] The CPU 110 constructs a control section and a communication section by executing the aggregated LCH control program, and performs an aggregated LCH control process. The aggregated LCH control process is a process of deciding whether or not to request allocation of a radio resource for transmitting a BSR (whether or not to implement an SR step) according to an accumulated data amount of an aggregated LCH and an aggregated threshold value (a first threshold value). At this time, a BSR is triggered, and the BSR becomes a trigger for implementing the next SR step.

[0083] The CPU 110 constructs a control section and a communication section by executing the separate LCH control program, and performs a separate LCH control process. The separate LCH control process is a process of deciding whether or not to request allocation of a radio resource for transmitting a BSR according to an accumulated data of a separate LCH, an accumulated data of an aggregated LCH, a separate threshold value, and an aggregated threshold value.

[0084] The CPU 110 constructs a control section and a communication section by executing the aggregated LCH radio resource allocation program, and performs an aggregated LCH radio resource allocation process. The aggregated LCH radio resource allocation process is a process of transmitting a BSR that includes information about an accumulated data amount of an aggregated LCH.

[0085] The CPU 110 constructs a control section and a communication section by executing the separate LCH radio resource allocation program, and performs a separate LCH radio resource allocation process. The separate LCH radio resource allocation process is a process of transmitting a BSR that includes information about an accumulated data amount of a separate LCH.

[0086] The CPU 110 constructs the control section and the communication section by executing the data transmission program, and performs data transmission processing. The data transmission processing is processing of transmitting data (the aggregated LCH, the individual LCH, or both) using the radio resources allocated from the base station device 200. Further, the data transmission processing has, for example, the LCP (Logical Channel Prioritization) processing described later, and determines data to be transmitted.

[0087] The structure of the control section and the communication section can be set using a control signal received from the radio base station device 200. For example, the setting related to the control program, the radio resource allocation program is set using a control signal transmitted from the other radio station 20 to the radio station 10. According to the setting, the individual LCH and the aggregated LCH are constructed, and the BSR trigger, the SR step, the BSR transmission, and the like are set. The control signal is, for example, preferably an RRC (Radio Resource Control) signal, but from the viewpoint of quick responsiveness of the setting, it can also be set as a MAC signal (MAC CE: MAC Control Element).

[0088] In addition, the setting method and the message used in the present setting can be applied in all embodiments.

[0089] <Structure Example of Base Station Device 200>

[0090] Figure 4 is a diagram showing a structure example of the base station device 200. The base station device 200 has a CPU 210, a storage 220, a memory 230, and a communication circuit 240.

[0091] The storage 220 is a secondary storage device such as a flash memory, an HDD, or an SSD that stores programs and data. The storage 220 stores a radio communication control program 221 and a radio resource allocation program 222.

[0092] The memory 230 is a region in which programs stored in the storage 220 are loaded. Further, the memory 230 can also be used as a region in which program storage data is stored.

[0093] The communication circuit 240 is a circuit that connects and communicates with the terminal device 100 and the core network 300. The communication circuit 240 that communicates with the terminal device 100 and the communication circuit 240 that connects with the core network can also be constituted by different communication circuits. For example, the communication circuit 240 that communicates with the terminal device 100 can be a device corresponding to a wireless connection, and the communication circuit 240 that communicates with the core network 300 can be a device corresponding to a wired connection.

[0094] The CPU 210 is a processor that loads a program stored in the storage 220 to the memory 230, executes the loaded program, constructs each section, and implements each process.

[0095] The CPU 210 constructs the radio control section and the reception section by executing the radio communication control program, and performs a radio communication control process. The radio communication control process is a process of controlling radio communication with the terminal device 100.

[0096] The CPU 210 constructs the radio control section and the reception section by executing the radio resource allocation program, and performs a radio resource allocation process. The radio resource allocation process is a process of, when an SR is received from the terminal device 100, transmitting an UL grant that allows transmission of a BSR, and, when a BSR is received from the terminal device 100, allocating an uplink radio resource in accordance with information included in the BSR, transmitting an UL grant including information related to the allocation to the terminal device 100, and performing notification.

[0097] < Radio Resource Allocation Process >

[0098] Figure 5 is a diagram illustrating an example of the timing of the radio resource allocation process. The terminal device 100 performs the aggregated LCH control process when transmission data in the uplink is generated (S100). The aggregated LCH control process S100 is a process of comparing the total value of the accumulated data of the target LCH of the aggregated LCH with a threshold value, and if the threshold value is exceeded (if it is equal to or greater than the threshold value), triggering a BSR (sometimes referred to as an aggregated BSR) including information related to the amount of accumulated data of the aggregated LCH, and attempting transmission.

[0099] Figure 6 is a diagram illustrating an example of an aggregated LCH. For example, the terminal device 100 has four LCHs, and defines data categories to be transmitted respectively. As shown in Figure 6 LCHs 1 to 3 are channels for transmitting eMBB data, and LCH 4 is a channel for transmitting URLLC data. The terminal device 100 sets, for example, LCHs 1 to 3 that transmit the same data category as the aggregated LCH. Then, the terminal device 100 compares the total value of the accumulated data amounts of data 1 to 3 with a threshold value, and decides whether or not to request allocation of a radio resource for transmitting data of the aggregated LCH.

[0100] In addition, for example, eMBB data has a longer allowable delay time than URLLC data. In Figure 6 , the LCH of data having a longer allowable delay time is set as the aggregated LCH, and the threshold value is increased, so that the number of times of BSR transmission can be suppressed, and thus the number of times of implementation of the allocation step of the radio resource for transmitting data 1 to 3 can be suppressed.

[0101] Figure 7 is an example of a processing flowchart showing the aggregated LCH control processing S100. The terminal device 100 waits for generation of transmission data (NO of S100-1). When the terminal device 100 generates transmission data (YES of S100-1), it determines whether the transmission data is the target data of the aggregated LCH (S100-2).

[0102] The terminal device 100, when the transmission data is not the target data of the aggregated LCH (NO of S100-2), executes the individual LCH radio resource allocation processing (S2000), and again waits for generation of transmission data (S100-1).

[0103] The individual LCH radio resource allocation processing S2000 is processing of controlling whether to request a radio resource for each individual LCH. The terminal device 100, in the individual LCH radio resource allocation processing S2000, for example, when the accumulated data amount of a certain LCH exceeds an individual threshold value (or more), requests a radio resource for transmitting data of the LCH. The individual threshold value is, for example, a threshold value set for each individual LCH, and can differ for each LCH. Hereinafter, since "or more" includes "exceeding", it is described as "or more".

[0104] The terminal device 100, when the transmission data is the target data of the aggregated LCH (YES of S100-2), calculates a total value of the accumulated data amount of the aggregated LCH (S100-3). Then, the terminal device 100 determines whether the accumulated data amount is the aggregated threshold value or more (S100-4).

[0105] The terminal device 100, when the accumulated data amount is not the aggregated threshold value or more (NO of S100-4), again waits for generation of transmission data (S100-1).

[0106] On the other hand, the terminal device 100, when the accumulated data amount is the aggregated threshold value or more (YES of S100-4), performs the aggregated LCH radio resource allocation processing (S1000). The aggregated LCH radio resource allocation processing is processing of requesting a radio resource for transmitting data of the aggregated LCH. The aggregated threshold value is a threshold value with which the total value of the accumulated data of the aggregated LCH is compared, and is, for example, a total value of individual threshold values of the LCHs or a value based on the total value. Further, the aggregated threshold value can be determined in accordance with the frequency of generation of data of the aggregated LCH or the frequency of execution of the allocation step of the radio resource, or the like.

[0107] Then, the terminal device 100 again waits for generation of transmission data (S100-1).

[0108] Return Figure 5In the timing of FIG. 10, the terminal device 100 determines whether the accumulated data amount of the aggregated LCH (for example, the total value of data 1 to 3) is equal to or greater than the aggregation threshold value in the aggregated LCH control process S100 (S100-4: "Yes"). At this time, the BSR is triggered, and the BSR becomes a trigger for implementing the following SR step. Figure 7

[0109] The terminal device 100 transmits the SR to the base station device 200 in the aggregated LCH radio resource allocation process S1000 (S101). The SR is an SR for transmitting the aggregated BSR, and is triggered by the BSR trigger. The base station device 200, upon receiving the SR, transmits the UL grant that allows the transmission of the uplink data (S102).

[0110] The terminal device 100, upon receiving the UL grant (S102), transmits the aggregated BSR to the base station device 200 (S103). The base station device 200, upon receiving the BSR (S103), transmits the UL grant that includes information on the radio resources allocated in accordance with the information included in the BSR (S104).

[0111] The terminal device 100, upon receiving the UL grant (S104), implements the LCP process (S105), generates the MAC PDU, and transmits the accumulated data 1 to 3 of the aggregated LCH to the base station device 200 using the allocated radio resources (S106).

[0112] Thus, the terminal device 100 in the second embodiment sets the aggregated LCH obtained by bundling a plurality of individual LCHs, and determines whether to request the allocation of the radio resources in accordance with the accumulated data amount of the aggregated LCH. Thereby, the radio resources are requested at the timing at which a certain amount of data is accumulated, compared to the case in which the radio resources are requested for each individual LCH, and thus the execution of the radio resource allocation step can be suppressed, and the power consumption of the terminal device 100 can be suppressed.

[0113] The following description is not limited to the present embodiment, but is also applicable to other embodiments. Thus, the description is omitted after the second embodiment if not specifically described.

[0114] In addition, the present embodiment and the following embodiments can be understood as embodiments in which the first embodiment is embodied. For example, the "wireless station 10" of the first embodiment can correspond to the terminal device 100, and the "other wireless station 20" can correspond to the "base station device 200". The "aggregated channel" of the first embodiment can correspond to the "aggregated LCH", the "first information" can correspond to the "first threshold value", the "control signal" can correspond to the "RRC signal or the MAC signal", the "first signal" can correspond to the "SR", and the "second signal" can correspond to the "BSR". ​

[0115] In addition, it is to be noted that the same means can be applied in the case of "1 channel" rather than "multiple channels". The terminal device 100 performs classification with respect to each data multiplexed on 1 channel. For example, as described in Embodiment 1, classification can be performed in accordance with QoS. The header of any of the data is analyzed, and classified into a plurality of QoS levels, QoS level 1 to QoS level n (n is an integer), in accordance with the ranking of each QoS. This can be performed by analyzing the ToS field in the IP header, the QIF (QoS Flow ID) field of the SDAP header, and the PFI field (ID of the PC5 QoS flow) (see Non-Patent Literature 40). Furthermore, each QoS level is associated with a virtual n channels. Furthermore, a channel group obtained by bundling (aggregating) a plurality of channels can be set as an aggregated LCH. In addition, the classification is not limited to classification based on QoS. Classification can also be performed in accordance with the category / genre of the data. Furthermore, classification can be performed in accordance with the data size, the packet size. Furthermore, classification can be performed in accordance with the amount of data accumulation (amount of data retention). That is, in the case of "1 channel" rather than "multiple channels" and the same means is applied, as described above, the aggregation level, which is obtained by aggregating a plurality of levels classified within 1 channel, can be processed as with the aggregated channel.

[0116] Furthermore, not only the communication between the wireless terminal and the base station device, but also V2X is the same. In this case, communication is performed between the terminal device and another terminal device. In the above-described Embodiment 2, an example of wireless communication between the "terminal device" and the "base station device" is described, but it can also be applied to wireless communication between the "terminal device" and the "another terminal device" in V2X.

[0117] [Embodiment 3]

[0118] Embodiment 3 will be described. The terminal device 100 of Embodiment 3 uses the aggregated LCH for control of the effectiveness of the individual LCH or control of the effectiveness of the BSR.

[0119] <Wireless resource allocation processing>

[0120] Figure 8 is a diagram showing an example of the timing of the wireless resource allocation processing. In the terminal device 100, a transmission opportunity of data of an individual LCH (for example, LCH_1) occurs (S200). The transmission opportunity of data of the individual LCH indicates, for example, a case where the amount of accumulated data of LCH_1 becomes equal to or greater than the individual threshold value of LCH_1 in the individual LCH wireless resource allocation processing S2000.

[0121] The terminal device 100 performs the individual LCH control process (S201) when a transmission opportunity of the uplink transmission data occurs (S200). The individual LCH control process S201 is a process of comparing the accumulated data amount of the individual LCH with a threshold value, and attempting to transmit a BSR (sometimes referred to as an individual BSR) including information on the accumulated data amount of the individual LCH if the threshold value is exceeded (equal to or greater than the threshold value). In this process, a BSR is triggered, which becomes a trigger for implementing the next SR step.

[0122] Figure 9 Fig. 17 is an example of a processing flowchart showing the individual LCH control process S201. The terminal device 100 waits for a data transmission opportunity of the individual LCH (NO of S201-1). When a data transmission opportunity of the individual LCH occurs (YES of S201-1), the terminal device 100 determines whether the individual LCH is an object of the aggregation LCH (S201-2).

[0123] The terminal device 100 executes the individual LCH radio resource allocation process S2000 in the case where the individual LCH is not an object of the aggregation LCH (NO of S201-2), and waits again for a data transmission opportunity of the individual LCH (S201-1). In addition, the individual LCH radio resource allocation process S2000 can be the same as the individual LCH radio resource allocation process S200 in the second embodiment, and a process equivalent to the process S201-1 can be omitted since it is determined in the process S201-1 whether it is a data transmission opportunity of the individual LCH.

[0124] The terminal device 100 calculates a total value of the accumulated data amounts of the aggregation LCHs (S201-3) in the case where the individual LCH is an object of the aggregation LCH (YES of S201-2). Then, the terminal device 100 determines whether the accumulated data amount is equal to or greater than the aggregation threshold value (S201-4).

[0125] The terminal device 100 waits again for a data transmission opportunity of the individual LCH (S201-1) in the case where the accumulated data amount is not equal to or greater than the aggregation threshold value (NO of S201-4). At this time, control is implemented in which the individual LCH is determined to be invalid.

[0126] On the other hand, the terminal device 100 performs the individual LCH radio resource allocation process (S2000) in the case where the accumulated data amount is equal to or greater than the aggregation threshold value (YES of S201-4). At this time, control is implemented in which the individual LCH is determined to be valid.

[0127] Then, the terminal device 100 waits again for a data transmission opportunity of the individual LCH (S201-1).

[0128] Returning to the timing of FIG. 8, the terminal device 100 determines in the individual LCH control process S201 that the accumulated data amount of the aggregated LCH (e.g., the total value of data 1 to 3) is equal to or greater than the aggregation threshold value (YES in S201-4 of FIG. 8). At this time, the control of the individual LCH is implemented as valid. Figure 8 Figure 9

[0129] The terminal device 100 transmits an SR to the base station device 200 in the individual LCH radio resource allocation process S2000 (S202). The base station device 200, upon receipt of the SR, transmits an UL grant that permits transmission of uplink data (S203).

[0130] The terminal device 100, upon receipt of the UL grant (S203), transmits a BSR that contains information about the accumulated data amount of the individual LCH (LCH_1) (accumulated amount of data 1) to the base station device 200 (S204). The base station device 200, upon receipt of the BSR (S204), transmits an UL grant that contains information about the radio resources allocated in accordance with the information contained in the BSR (S205).

[0131] The terminal device 100, upon receipt of the UL grant (S205), implements LCP (S206), generates a MAC PDU, and transmits the accumulated data 1 of the individual LCH (LCH_1) to the base station device 200 using the allocated radio resources (S207).

[0132] Thus, the terminal device 100 in the second embodiment uses the accumulated data amount of the aggregated LCH and the aggregation threshold value for the determination of the validity of the individual LCH. The determination of the validity of the individual LCH can be said to be the determination of the validity of the BSR triggered by the LCH.

[0133] In addition, it can also be that, in the individual LCH control process S201, in the case where the accumulated data amount is not equal to or greater than the aggregation threshold value, the terminal device 100 further determines whether the BSR of the individual LCH is valid (activation) or invalid (deactivation) on the basis of information other than the accumulated data amount of the aggregated LCH (e.g., the usage status of the radio resources, the urgency of the accumulated data, etc.), and if valid, proceeds to the individual LCH radio resource allocation process S2000.

[0134] The validity of the individual LCH has been described so far. However, the present embodiment will be described from the viewpoint of the validity of the BSR. With respect to the BSR triggered by the individual LCH, via the valid / invalid determination (activation / deactivation) of the BSR, if the BSR is determined to be valid, it becomes a trigger for implementing the following SR step. ​​

[0135] The terminal device 100 determines that the triggered BSR is invalid (deactivated) in a case where the accumulated data amount is not above the aggregation threshold (NO of S201-4). As a result, the BSR is invalidated and does not become a trigger for implementing the following SR step. The invalidated trigger is held by the terminal device 100 as a pending BSR until it becomes valid.

[0136] On the other hand, the terminal device 100 determines that the triggered BSR is valid (activated) in a case where the accumulated data amount is above the aggregation threshold (YES of S201-4). As a result, the BSR is validated and becomes a trigger for implementing the following SR step.

[0137] In the present embodiment, it is also possible to suppress execution of the wireless resource allocation step, and it is possible to suppress an increase in signaling or suppress power consumption of the terminal device 100.

[0138] [4th Embodiment]

[0139] The 4th embodiment will be described. The terminal device 100 of the 4th embodiment determines whether or not to transmit a BSR including the accumulated data amount of the aggregated LCH when a data transmission opportunity of the individual LCH occurs. That is, the terminal device 100 in the 4th embodiment transmits a BSR including information about the accumulated data amount of the aggregated LCH when both conditions of a data transmission opportunity corresponding to the accumulated data amount of the individual LCH and a data transmission opportunity corresponding to the accumulated data amount of the aggregated LCH are satisfied.

[0140] <Wireless Resource Allocation Processing>

[0141] Figure 10 FIG. 12 is a diagram showing an example of the timing of the wireless resource allocation processing. In the terminal device 100, a data transmission opportunity of the individual LCH (e.g., LCH 1) occurs (S300).

[0142] The terminal device 100 performs the individual LCH control processing (S301) when a data transmission opportunity of the uplink occurs (S300). The individual LCH control processing S301 is processing in which the accumulated data amount of the individual LCH is compared with a threshold, and if the threshold is exceeded (is above the threshold), a BSR including information about the accumulated data amount of the aggregated LCH is attempted to be transmitted. In this processing, a BSR is triggered, and the BSR becomes a trigger for implementing the following SR step.

[0143] Figure 11is a diagram showing an example of a processing flowchart of the individual LCH control processing S301. The terminal device 100 waits for an opportunity of data transmission of the individual LCH (NO of S301-1). When the opportunity of data transmission of the individual LCH occurs (YES of S301-1), the terminal device 100 confirms whether or not the individual LCH is an object of the aggregated LCH (S301-2).

[0144] When the individual LCH is not an object of the aggregated LCH (NO of S301-2), the terminal device 100 executes the individual LCH radio resource allocation processing (S2000), and again waits for an opportunity of data transmission of the individual LCH (S301-1).

[0145] When the individual LCH is an object of the aggregated LCH (YES of S301-2), the terminal device 100 calculates a total value of the accumulated data amount as the aggregated LCH (S301-3). Then, the terminal device 100 determines whether or not the accumulated data amount is equal to or greater than the aggregation threshold value (S301-4).

[0146] When the accumulated data amount is not equal to or greater than the aggregation threshold value (NO of S301-4), the terminal device 100 again waits for an opportunity of data transmission of the individual LCH (S301-1). At this time, as with the third embodiment, control of the invalid determination of the individual LCH or the BSR can also be implemented.

[0147] On the other hand, when the accumulated data amount is equal to or greater than the aggregation threshold value (YES of S301-4), the terminal device 100 performs the aggregated LCH radio resource allocation processing (S1000). At this time, as with the third embodiment, control of the valid determination of the individual LCH or the BSR can also be implemented.

[0148] Then, the terminal device 100 again waits for an opportunity of data transmission of the individual LCH (S301-1).

[0149] Returning to the timing of Figure 10 In the individual LCH control processing S301, the terminal device 100 determines whether or not the accumulated data amount of the aggregated LCH (for example, the total value of data 1 to 3) is equal to or greater than the aggregation threshold value (YES of S301-4 of Figure 11 At this time, as with the third embodiment, control of the valid determination of the individual LCH or the BSR can also be implemented.

[0150] The terminal device 100 transmits the SR to the base station device 200 in the aggregated LCH radio resource allocation processing S1000 (S302). The base station device 200, upon receipt of the SR, transmits the UL grant that allows transmission of the uplink data (S303). The subsequent processing S303 to S307 is the same as that of the second embodiment. Figure 5The processes S102 to S106 are the same.

[0151] In the fourth embodiment, the terminal device 100 transmits a BSR containing information related to the accumulated data volume of the aggregated LCH when both the accumulated data volume of the individual LCH and the accumulated data volume of the aggregated LCH satisfy the transmission condition (the individual LCH is above the individual threshold, and the aggregated LCH is above the aggregated threshold). This suppresses the number of requests for radio resource allocation, reduces signaling increases, and minimizes the power consumption of the terminal device 100.

[0152] Alternatively, for example, it can also be in Figure 11 In the "No" path of branch processing S301-4, a separate radio resource allocation process S2000 is performed. For example, when the terminal device 100 has sufficient power or is connected to a charger, the necessity of power consumption by the terminal device 100 is sometimes considered low. In this case, by performing this process, radio resource allocation is performed when the accumulated data amount of either the accumulated data amount of a single LCH or the accumulated data amount of the aggregated LCH is above a threshold, thus enabling data transmission with higher immediacy.

[0153] [Fifth Implementation]

[0154] The fifth embodiment will be described. In the first to fourth embodiments described above, when radio resource allocation is performed based on the accumulated data of the clustered LCH, if the accumulation of the clustered LCH data is slow (when the frequency of clustered LCH data occurrence is low), the time before data transmission becomes longer, sometimes resulting in a delay. Therefore, in the fifth embodiment, a clustered LCH protection timer (timer) is set, and if the clustered LCH data is not transmitted after a predetermined time, the clustered LCH radio resource allocation process S1000 is executed.

[0155] <Wireless Resource Allocation Processing>

[0156] Figure 12 This diagram illustrates an example of the timing sequence for the radio resource allocation process when the clustered LCH protection timer times out. In terminal device 100, the clustered LCH protection timer times out (S400). Upon the timeout (S400), terminal device 100 executes the clustered LCH radio resource allocation process S1000. Subsequent processes S401 to S406... Figure 5 The processes S101 to S106 are the same.

[0157] For example, when the accumulated data amount of the aggregated LCH is 0 (a state in which no new data of the aggregated LCH is generated after the accumulated data of the aggregated LCH is transmitted), the aggregated LCH protection timer is started at the time when the data of the aggregated LCH is generated. Further, the aggregated LCH protection timer is stopped, for example, when the accumulated data of the aggregated LCH is transmitted.

[0158] The timer value of the aggregated LCH protection timer is set, for example, in consideration of the allowable delay time of end-to-end between terminal devices or between applications. The terminal device 100 sets, as the timer value, a time that does not exceed the allowable delay time.

[0159] Further, the timer value of the aggregated LCH protection timer can be set, for example, in accordance with the discard timer (PDCP DiscardTimer). The discard timer is, for example, a time (an allowable time until transmission) during which the data can be held at the PDCP layer. When the time expires, the corresponding data (PDCP SDU) is discarded. The terminal device 100 sets the timer value of the aggregated LCH protection timer in such a manner that it does not exceed the timer value of the discard timer. In addition, since the discard timer is set in accordance with the importance of data (for example, whether it is critical data) or the allowable delay time, or the like, the terminal device 100 needs to select the timer value of the discard timer to be considered (referenced) in accordance with the importance of the data of the aggregated LCH or the allowable delay time, or the like. Further, the value of the protection timer can be set by the RRC signal.

[0160] [6th Embodiment]

[0161] The 6th embodiment will be described. The terminal device 100 of the above-described 1st to 4th embodiments uses the radio resources for the individual BSR when transmitting the data of the individual LCH and uses the radio resources for the aggregated BSR when transmitting the data of the aggregated LCH in the LCP process. However, the LCP process is, for example, a matter of design implemented in accordance with a predetermined algorithm, and the radio resources specified by the UL grant received by the terminal device 100 from the base station device 200 can be used to transmit the data of any LCH. For example, in the timing of Figure 5 , the UL grant can be used when transmitting data 2 to 4 other than data 1 in the MAC PDU. In other words, the UL grant is allocated in units of the terminal device 100, and is not allocated in a manner of occupation for transmitting the data of a specific LCH. Further, for example, in the timing of Figure 8 , the UL grant can be used when transmitting data 2 to 4 other than data 1 in the MAC PDU.

[0162] The terminal device 100 in the sixth embodiment specifies a usage method of the radio resources allocated in the LCP process.

[0163] Figure 13 is a diagram illustrating an example of a usage method of radio resources in a case where the result of implementing the LCP process for the terminal device 100 is that radio resources are allocated to the individual LCH. In Figure 13 , the terminal device 100 implements the SR procedure for the BSR of the individual LCH (LCH_4) and receives the UL grant. The terminal device 100 implements control to prohibit (or limit) transmission of data of the aggregate LCH in the LCP process, to control so that radio resources are allocated to the individual LCH. For example, LCH_4 is an LCH of URLLC data, which allows a short delay time compared to eMBB. Therefore, it is preferable that LCH_4 be transmitted in preference to the aggregate LCH. Therefore, the terminal device 100 suppresses delay in transmission of data of high priority, for example, by not using radio resources allocated to the individual LCH of data of high priority in transmission of data of the aggregate LCH. Such control is implemented, for example, by extending the LCP process and introducing an algorithm to implement the limitation.

[0164] Figure 14 is a diagram illustrating an example of a usage method of radio resources in a case where the result of implementing the LCP process for the terminal device 100 is that radio resources are allocated to the aggregate LCH. In Figure 14 , the terminal device 100 implements the SR procedure for the BSR of the aggregate LCH and receives the UL grant. The terminal device 100 controls so that radio resources are not allocated to the aggregate LCH in the LCP process, and allows transmission of data 4 of the individual LCH (LCH_4). As described above, in a case where there is data such as LCH_4 that is transmitted in preference to data of the aggregate LCH, even radio resources allocated to the aggregate LCH, the terminal device 100 allows transmission of data of the individual LCH of high priority using the radio resources. Thereby, it is possible to preferentially transmit data of the LCH of high priority. Such control is implemented, for example, by extending the LCP process and introducing an algorithm to implement the limitation.

[0165] In addition, in these examples, in a case where radio resources are allocated to data of the LCH of high priority, and radio resources are in surplus (there is a margin), it is also possible to allocate radio resources to the aggregate LCH.

[0166] [Other Embodiments]

[0167] Each of the embodiments can be combined, respectively. Information included in data or BSR transmitted in the LCP process in each of the embodiments can be used in other embodiments, respectively.

[0168] Moreover, the control based on the aggregated LCH and the control based on the individual LCH can be used in distinction. The terminal device 100 can also determine whether to control using the individual LCH or to control as the aggregated LCH, for example, in accordance with the radio quality, the frequency of generation of data, the allowable delay time, and the like. Moreover, the base station device 200 can notify the terminal device 100 of which control to use.

[0169] Explanation of Reference Signs

[0170] 1: Communication system

[0171] 10: Wireless station

[0172] 11: Control section

[0173] 12: Communication section

[0174] 13: Aggregated channel

[0175] 20: Other wireless station

[0176] 30: Communication system

[0177] 100: Terminal device

[0178] 110: CPU

[0179] 120: Storage

[0180] 121: Aggregated LCH control program

[0181] 122: Individual LCH control program

[0182] 123: Aggregated LCH radio resource allocation program

[0183] 124: Individual LCH radio resource allocation program

[0184] 125: Data transmission program

[0185] 130: Memory

[0186] 140: Communication circuit

[0187] 200: Base station device

[0188] 210: CPU

[0189] 220: Storage

[0190] 221: Radio communication control program

[0191] 222: Radio resource allocation program

[0192] 230: Memory

[0193] 240: Communication circuit

[0194] 300: core network

Claims

1. A wireless station, the wireless station having: The control unit is configured to: set a channel group (i.e., an aggregated channel) by aggregating multiple channels and first information related to the aggregated channel; and execute control to generate a transmission opportunity for a second signal based on the data volume of the aggregated channel and the first information, the second signal being used to request uplink resources for the first signal; and The communication unit is configured to: transmit the second signal to other wireless stations based on the transmission trigger of the second signal, and receive wireless resources from the other wireless stations. The radio resources are allocated to data in the aggregation channel, but not to data in channels not included in the aggregation channel.

2. The wireless station according to claim 1, wherein, The communication unit is further configured to send a signal requesting the transmission of radio resources of the channel when the data in the channel is not included in the aggregation channel.

3. The wireless station according to claim 1, wherein, The control unit is also configured to perform data processing for allocating the radio resources to the aggregation channel.

4. The wireless station according to claim 1, wherein, The communication unit is further configured to receive an RRC signal as a control signal containing third information, the third information being information for setting the aggregation channel.

5. The wireless station according to claim 1, wherein, The communication unit is also configured to receive an RRC signal, which is a control signal containing the first information.

6. The wireless station according to claim 1, wherein, The first information includes a first threshold related to the amount of data in the aggregation channel. When the amount of data in the aggregation channel is greater than or equal to the first threshold, the control unit generates a trigger for transmitting the first signal.

7. The wireless station according to claim 1, wherein, The first signal is a buffer status report containing information related to the amount of data. The second signal is a request for scheduling uplink radio resources.

8. The wireless station according to claim 6, wherein, The control unit is also configured to control the transmission trigger for generating the first signal based on the generation of data from the aggregation channel.

9. The wireless station according to claim 6, wherein, The first information includes the first threshold. The first signal contains information related to the amount of data in the first channel constituting the aggregation channel. The control unit is further configured to: execute control of generating a transmission opportunity for the first signal at a transmission opportunity of the first signal of the first channel corresponding to the data amount of the first channel, and generate a transmission opportunity for the first signal when the data amount of the aggregation channel is above the first threshold.

10. The wireless station according to claim 6, wherein, The control unit executes control to generate the transmission timing of the first signal at the transmission timing of the first signal of the first channel corresponding to the data amount of the first channel constituting the aggregation channel.

11. The wireless station according to claim 6, wherein, The control unit also includes a protection timer. The control unit is also configured to: The protection timer is started at the beginning of the data accumulation in the aggregation channel. The protection timer is stopped when the data from the aggregation channel is transmitted, and, The first signal is generated when the protection timer times out.

12. The wireless station according to claim 2, wherein, The communication unit will not use the radio resources allocated to channels other than the aggregation channel for data transmission on the aggregation channel.

13. The wireless station according to claim 1, wherein, The communication unit is also configured to use the radio resources allocated to the aggregation channel to transmit data from channels other than the aggregation channel.

14. A wireless station, the wireless station having: A communication unit configured to: receive from other wireless stations a second signal requesting uplink resources for a first signal, the second signal being transmitted based on a transmission trigger of the second signal, the transmission trigger being generated based on the data volume of an aggregation channel and first information related to the aggregation channel, the aggregation channel being a channel group obtained by aggregating multiple channels; and The transmitting unit is configured to transmit wireless resources allocated to the other wireless stations in response to the reception of the second signal. The radio resources are allocated to data in the aggregation channel, but not to data in channels not included in the aggregation channel.

15. A communication system having a first wireless station and a second wireless station, wherein, The first wireless station is configured to: A channel group, which is formed by aggregating multiple channels, is defined as the aggregated channel, along with first information related to the aggregated channel. The execution control causes a transmission opportunity to be generated based on the data volume of the aggregation channel and the first information, the second signal being used to request uplink resources for the first signal. The second signal is transmitted to the second wireless station according to the transmission opportunity of the second signal. The first wireless station is also configured to: In response to the reception of the second signal, the radio resources allocated to the first radio station are transmitted. The radio resources are allocated to data in the aggregation channel, but not to data in channels not included in the aggregation channel.

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