WO2024018641A1 - 無線基地局及び端末 - Google Patents
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- WO2024018641A1 WO2024018641A1 PCT/JP2022/028537 JP2022028537W WO2024018641A1 WO 2024018641 A1 WO2024018641 A1 WO 2024018641A1 JP 2022028537 W JP2022028537 W JP 2022028537W WO 2024018641 A1 WO2024018641 A1 WO 2024018641A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Definitions
- the present disclosure relates to a wireless base station and a terminal that transmit and receive data units for which importance is set.
- the 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and the next generation specifications called Beyond 5G, 5G Evolution, or 6G. is also progressing.
- 5G also known as New Radio (NR) or Next Generation (NG)
- NG Next Generation
- 6G 6th Generation
- 3GPP Release 18 targets handling of traffic related to XR (eXtended Reality) services (Non-Patent Document 1).
- PDUs Protocol Data Units
- QoS Quality of Service
- QFI QoS Flow Identification
- Non-Patent Document 2 In XR, where low latency is required, by using such sub QFI, it is being considered to discard PDUs with low importance when resources are tight (Non-Patent Document 2).
- the present disclosure has been made in view of this situation, and aims to provide a wireless base station and a terminal that can clarify the relationship between a PDU to be discarded and a PDU set made up of the PDU. purpose.
- One aspect of the disclosure includes a transmitting/receiving unit 110 that transmits and receives a data set made up of a plurality of data units to which importance is set to and from a terminal, and a transmitting/receiving unit 110 to which a lower importance of the plurality of data units is set.
- a control unit 120 that discards a data unit; the control unit 120 is a wireless base station that assigns an identification number to the data unit indicating a transmission order in a data set constituted by the data unit; be.
- One aspect of the disclosure includes a transmitting/receiving unit 210 that transmits/receives a data set including a plurality of data units whose importance is set to and from a wireless base station, and a transmitter/receiver unit 210 that transmits and receives a data set including a plurality of data units whose importance is set among the plurality of data units.
- a control unit 220 that discards a data unit that is sent to a terminal; be.
- FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10.
- FIG. 2 is a diagram showing a QoS architecture used in the wireless communication system 10.
- FIG. 3 is a diagram showing PDUs in a QoS flow.
- FIG. 4 is a functional block diagram of the gNB 100 and the UE 200.
- FIG. 5 is a diagram showing the protocol stacks of the gNB 100 and the UE 200.
- FIG. 6 is a functional block diagram of the control units 120 and 220 in the SDAP (Service Data Adaptation Protocol) layer.
- FIG. 7 is a diagram showing a configuration example of SDAP-Config.
- FIG. 8 is a diagram showing a configuration example of an SDAP header in DL.
- FIG. 9 is a diagram showing a configuration example of an SDAP header in UL.
- FIG. 10 is a functional block diagram of the control units 120 and 220 in the PDCP (Packet Data Convergence Protocol)/RLC (Radio Link Control)/MAC (Medium Access Control) layer.
- FIG. 11 is a diagram illustrating assigning identification numbers to PDUs in a QoS flow.
- FIG. 12 is a diagram showing a configuration example of a PDCP header.
- FIG. 13 is a diagram showing an example of the hardware configuration of the gNB 100 and the UE 200.
- FIG. 14 is a diagram showing an example of the configuration of vehicle 2001.
- FIG. 1 is an overall schematic configuration diagram of a wireless communication system 10 according to an embodiment.
- the wireless communication system 10 is a wireless communication system compliant with 5G New Radio (NR), and includes a Next Generation-Radio Access Network 20 (hereinafter referred to as NG-RAN20), a terminal 200 (hereinafter referred to as UE200), and a core network 30. .
- NR 5G New Radio
- NG-RAN20 Next Generation-Radio Access Network 20
- UE200 terminal 200
- core network 30 hereinafter referred to as 5G New Radio
- the wireless communication system 10 may be a wireless communication system that follows a system called Beyond 5G, 5G Evolution, or 6G.
- NG-RAN 20 includes a radio base station 100 (hereinafter referred to as gNB 100).
- gNB100 transmits and receives data units to and from UE200 via multiple radio bearers B1 and B2.
- B1 and B2 the specific configuration of the wireless communication system 10 including the number of gNBs 100 and UEs 200 is not limited to the example shown in FIG. 1.
- the NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to the core network 30.
- the core network 30 includes a User Plane Function 300 (hereinafter referred to as UPF300). Note that the NG-RAN 20 and the core network 30 may be simply expressed as a "network.”
- FIG. 2 is a diagram showing a QoS architecture used in the wireless communication system 10.
- the UE 200 and the UPF 300 map PDUs, which are data units received from an application/service layer (not shown), to QoS flows. Specifically, the UE 200 maps UL PDUs, and the UPF 300 maps DL PDUs.
- PDUs mapped to QoS flows are marked with the QFI set for the QoS flow. In other words, each QoS flow is formed by PDUs marked with the same QFI.
- PDUs mapped to QoS flows are transmitted and received between gNB 100 and UE 200 via multiple radio bearers B1 and B2. Therefore, the gNB 100 or the UE 200 maps the QoS flow to one of the plurality of radio bearers B1 and B2.
- PDUs marked with the same QFI are further marked with a sub QFI depending on the importance of the PDU.
- sub QFI is an identifier that indicates the importance of the PDU. This allows PDUs marked with the same QFI to have different importance levels. Note that sub QFI may be rephrased as Priority.
- I-flame is image data that constitutes video data, and is image data that can be decoded independently.
- P-flame is image data that constitutes video data, and is image data that shows the difference from the previous I-flame.
- B-flame is image data that constitutes video data, and is image data that shows the difference between the previous and subsequent flames.
- N in PDU N is also referred to as the PDU sequence number.
- the gNB 100 or UE 200 of the embodiment maps the PDU to one of the multiple radio bearers B1 and B2 based on the sub QFI.
- FIG. 4 is a functional block diagram of the gNB 100 and UE 200.
- gNB 100 includes a transmitter/receiver 110 and a controller 120.
- UE 200 includes a transmitter/receiver 210 and a controller 220.
- the transmitting/receiving units 110 and 210 transmit and receive PDUs via multiple radio bearers B1 and B2.
- the control units 120 and 220 control transmission and reception of PDUs. For example, a QoS flow is mapped to one of multiple radio bearers B1 and B2.
- FIG. 5 is a diagram showing the protocol stack of the gNB 100 and the UE 200.
- the SDAP Service Data Adaptation Protocol
- the PDCP layer is provided above the RLC (Radio Link Control) layer.
- the RLC layer is provided above the MAC (Medium Access Control) layer.
- the MAC layer is provided above the PHY (PHYsical) layer.
- control unit 120 includes a mapping unit 121 and a header adding unit 126a in the SDAP layer.
- control unit 220 includes a mapping unit 221 and a header adding unit 226a in the SDAP layer.
- the mapping units 121 and 221 map the QoS flow to one of the plurality of radio bearers B1 and B2. Furthermore, the mapping sections 121 and 221 map the PDU to one of the plurality of radio bearers B1 and B2.
- the mapping of PDUs by the mapping units 121 and 221 is performed based on the sub QFI marked on the PDU, as shown in FIG. 7, for example. Note that FIG. 7 shows a configuration example of SDAP-Config.
- the header adding units 126a and 226a add an SDAP header to the PDU.
- the header adding units 126a and 226a may add sub QFI to the SDAP header, as shown in FIGS. 8 and 9, for example.
- the SDAP header given to the PDU includes sub QFI, which is an identifier indicating the importance of the PDU.
- FIG. 8 shows an example of the configuration of the SDAP header in DL.
- FIG. 9 shows an example of the configuration of the SDAP header in UL.
- the control unit 120 includes an identification number assigning unit 122, a timer unit 123, a discarding unit 124, a notification unit 125, and a header assigning unit in at least one of the PDCP layer, RLC layer, and MAC layer. 126b.
- the control unit 220 includes an identification number adding unit 222, a timer unit 223, a discarding unit 224, a notification unit 225, and a header adding unit 226b in at least one of the PDCP layer, RLC layer, and MAC layer.
- each unit provided in the PDCP layer will be explained, but this may be read as a description of each unit provided in the RLC layer and MAC layer as appropriate.
- the identification number assigning units 122 and 222 assign to the PDU an identification number that indicates the relationship with a PDU set, which is a data set constituted by the PDU. Specifically, an identification number indicating the transmission order in the PDU set constituted by the PDU is assigned. Note that the PDU set in the embodiment is composed of a plurality of adjacent PDUs.
- PDU 1, PDU 2, PDU 3, and PDU 4 that make up PDU set 1 are assigned according to the sequence number of the PDU set (N of PDU set N) and the transmission order in the PDU set. , are given identification numbers [1,1], [1,2], [1,3], and [1,4], respectively.
- PDU 5, PDU 6, PDU 7, and PDU 8 that make up PDU set 2 have [2,1], [2,2], [2,3], and [2,4], respectively.
- An identification number will be assigned.
- the identification number of the embodiment is indicated by the identifier PDU set SN. That is, PDU set SN is an identifier indicating an identification number. PDU set SN may be added to the PDCP header by header adding units 126b and 226b, which will be described later (see FIG. 12). Note that PDU set SN in FIG. 12 is PDCP set SN in accordance with the explanation of the PDCP header.
- the timer units 123 and 223 set a time limit on the PDU.
- the time limit is set, for example, based on the PDU delay requirement.
- the time limit in the embodiment is indicated by the identifier Packet delay budget. That is, Packet delay budget is an identifier indicating a time limit.
- the packet delay budget may be added to the PDCP header by header adding units 126b and 226b, which will be described later (see FIG. 12).
- the discard units 124 and 224 may discard PDUs to which low importance is set.
- Setting a low importance level may mean that a relatively low importance level is set in the PDU set described above.
- the objects to be discarded by the discard units 124 and 224 are, for example, PDU 2, PDU 3, and PDU 4, which are set with a lower importance level than PDU 1 in PDU set 1 in FIG. 11, and in PDU set 2, PDU 6, PDU 7, and PDU 8 have lower importance than PDU 5.
- the discard units 124 and 224 may discard PDUs to which a low importance level is set when predetermined conditions are met.
- the predetermined condition may be, for example, that the resources of gNB 100 or UE 200 are tight.
- the discard section 124, 224 may discard the PDU. Specifically, PDUs that have not been transmitted from the PDCP layer to the RLC layer, which is a lower layer, may be discarded even after the time limit set by the timer units 123 and 223 has been exceeded. Note that when the discard units 124 and 224 are provided in the RLC layer, PDUs that have not been transmitted from the RLC layer to the MAC layer, which is a lower layer, may be discarded. Similarly, when the discard units 124 and 224 are provided in the MAC layer, they may discard PDUs that have not been transmitted from the MAC layer to the PHY layer, which is a lower layer.
- the discarding of PDUs by the discarding units 124 and 224 may be based on the importance level set for the PDU, may be based on the time limit set for the PDU, or may be based on the time limit set for the PDU. It may be based on both the importance set and the time limit.
- the notification unit 125, 225 may notify the SDAP layer, which is a layer higher than the PDCP layer, that the discard unit 124, 224 has discarded the PDU. Note that when the layer that discarded the PDU is the RLC layer, the PDCP layer, which is a layer higher than the RLC layer, may be notified of the discard of the PDU. Similarly, when the layer that discarded the PDU is the MAC layer, the RLC layer, which is a layer higher than the MAC layer, may be notified of the discard of the PDU.
- the header adding units 126b and 226b add a PDCP header to the PDU.
- the header adding units 126b and 226b may add sub QFI to the PDCP header, as shown in FIG. 12, for example.
- the PDCP header given to the PDU includes sub QFI, which is an identifier indicating the importance of the PDU.
- the header adding units 126b and 226b may add PDU set SN (PDCP set SN) to the PDCP header.
- the PDCP header given to the PDU includes a PDU set SN (PDCP set SN) that is an identifier indicating an identification number indicating the transmission order of PDUs in the PDU set.
- the header adding units 126b and 226b may add a Packet delay budget to the PDCP header.
- the PDCP header given to the PDU includes a Packet delay budget, which is an identifier indicating the time limit until the PDU is discarded.
- header adding units 126b and 226b may add sub QFI, PDU set SN, and Packet delay budget to the RLC header and MAC header.
- the gNB100 or UE200 performs an operation of mapping a PDU to one of multiple radio bearers B1 and B2, and an operation of setting an identification number on the PDU that indicates the relationship with the PDU set constituted by the PDU.
- This section describes the operation of setting a time limit on PDUs and discarding PDUs that cannot be transmitted within the time limit.
- Operation example (3.2.1) Operation example 1 The gNB 100 or UE 200 maps the PDU to one of the multiple radio bearers B1 and B2 based on the importance set to the PDU.
- Radio bearer B1 may be treated preferentially compared to radio bearer B2.
- radio bearer B1 may have a higher logical channelPriority in RLC-bearerConfig than radio bearer B2. Thereby, radio bearer B1 may be scheduled more preferentially than radio bearer B2.
- PDUs marked with the same sub QFI may be combined into one PDU.
- the gNB 100 or UE 200 may add sub QFI to the header given to the PDU.
- the header adding unit 126a or the header adding unit 226a may add sub QFI to the SDAP header added to the PDU.
- the header adding unit 126b or the header adding unit 226b may add sub QFI to the PDCP header, RLC header, and MAC header added to the PDU.
- the header given to the PDU includes sub QFI, which is an identifier indicating the importance of the PDU.
- the gNB 100 or the UE 200 assigns to the PDU an identification number that indicates the relationship with a PDU set, which is a data set made up of the PDU.
- the identification number assigning unit 122 or the identification number assigning unit 222 assigns an identification number indicating the transmission order in a PDU set, which is a data set constituted by the PDU.
- the identification number assigning unit 122 or the identifying number assigning unit 222 assigns sequence numbers of the PDU set (PDU set Identification numbers [1,1], [1,2], [1,3], and [1,4] are assigned, respectively, according to N of N) and the transmission order in the PDU set.
- PDU set Identification numbers [1,1], [1,2], [1,3], and [1,4] are assigned, respectively, according to N of N
- PDU 6 PDU 7, and PDU 8 that make up PDU set 2
- [2,1], [2,2], [2,3], [2,4] will be assigned an identification number.
- the gNB 100 or UE 200 discards PDUs to which low importance is set.
- the discarding unit 124 or the discarding unit 224 discards a PDU to which low importance is set in at least one of the PDCP layer, RLC layer, and MAC layer, for example, when resources are tight.
- a low importance level is set to a relatively low importance level in the above-mentioned PDU set.
- the objects to be discarded by the discard unit 124 or the discard unit 224 are, for example, PDU 2, PDU 3, and PDU 4, which are set with lower importance than PDU 1 in PDU set 1 in FIG. are PDU 6, PDU 7, and PDU 8, which have lower importance than PDU 5.
- the importance level set for the PDU is defined by sub QFI.
- the gNB 100 or UE 200 may notify a layer higher than the layer that discarded the PDU that the PDU has been discarded.
- the notification unit 125 or the notification unit 225 may notify the SDAP layer, which is a layer higher than the PDCP layer, that the PDU has been discarded.
- the PDCP layer which is a layer higher than the RLC layer
- the RLC layer which is a layer higher than the MAC layer
- the PDU has been discarded may be notified that the PDU has been discarded.
- the gNB 100 or UE 200 may add PDU set SN to the header given to the PDU.
- the header adding unit 126b or the header adding unit 226b may add PDU set SN (PDCP set SN) to the PDCP header added to the PDU.
- PDU set SN may be added to the RLC header and MAC header.
- the header given to the PDU includes a PDU set SN, which is an identifier indicating an identification number indicating the transmission order of PDUs in the PDU set.
- Operation example 3 gNB100 or UE200 sets a time limit for PDU. Specifically, the timer section 123 or the timer section 223 sets a time limit on the PDU. The time limit is set, for example, based on the PDU delay requirement.
- gNB 100 or UE 200 cannot transmit the PDU within the time limit set by timer section 123 or timer section 223, it discards the PDU. Specifically, if the discard unit 124 or the discard unit 224 fails to transmit the PDU within the above-mentioned time limit in at least one of the PDCP layer, RLC layer, and MAC layer, the discard unit 124 or 224 discards the PDU.
- the gNB 100 or UE 200 may notify a layer higher than the layer that discarded the PDU that the PDU has been discarded.
- the notification unit 125 or the notification unit 225 may notify the SDAP layer, which is a layer higher than the PDCP layer, that the PDU has been discarded.
- the PDCP layer which is a layer higher than the RLC layer
- the RLC layer which is a layer higher than the MAC layer
- the PDU has been discarded may be notified that the PDU has been discarded.
- the gNB 100 or UE 200 may add a Packet delay budget to the header given to the PDU.
- the header adding unit 126b or the header adding unit 226b may add a Packet delay budget to the PDCP header added to the PDU.
- a Packet delay budget may be added to the RLC header and MAC header.
- the header given to the PDU includes Packet delay budget, which is an identifier indicating the time limit set for the PDU.
- the gNB 100 or UE 200 of the embodiment described above maps the PDU to one of the plurality of radio bearers B1 and B2 based on the importance set in the PDU, so The importance of PDU can be reflected in mapping with B2.
- the gNB 100 or UE 200 of the embodiment described above assigns to the PDU an identification number indicating the transmission order in the PDU set constituted by the PDU. This makes it possible to clarify the relationship between PDUs and PDU sets in order to support discarding PDUs.
- the gNB 100 or UE 200 of the embodiment described above sets a time limit on PDUs and discards PDUs that cannot be transmitted within the time limit, so for example, it retransmits PDUs that could not meet the delay requirements and saves resources. There is no risk of wasting it.
- XR refers to a composite environment of reality and virtuality generated by a computer, but is not limited to such XR, and the wireless communication system of the above-described embodiment may be applied to streaming music, video, and the like.
- PDU may be read as SDU (Service Data Unit).
- the number of the plurality of radio bearers B1 and B2 is described as two, but the number may be three or more.
- setting a low importance level means that a relatively low importance level is set in the PDU set described above, but it is not limited to this.
- setting a low level of importance may mean that a level of importance lower than a predetermined level of importance is set.
- one PDU set includes a mixture of PDUs with high importance and PDUs with low importance, but the present invention is not limited to this. That is, the importance levels of PDUs forming one PDU set may be the same. If a low importance level is set for these PDUs, the discard unit 124, 224 may discard the PDU set instead of discarding each PDU.
- the discard units 124 and 224 were described as discarding PDUs based on at least one of the importance level or the time limit set for the PDUs, but the present invention is not limited to this.
- a PDU may be discarded based on the data size of the PDU.
- the data size of the PDU is indicated by the identifier Data size. That is, Data size is an identifier indicating the data size of the PDU. Data size may be included in the header of the PDU by the header adding units 126b and 226b (see FIG. 12).
- an indicator may be set for the PDU to indicate that the PDU may be discarded.
- the discard unit 124, 224 may discard the PDU to which this indicator is set. Furthermore, the discarding units 124 and 224 may discard PDUs to which this indicator is set and which cannot be transmitted within the set time limit.
- the timer unit 123 and the discard unit 124 are provided in at least one of the PDCP layer, RLC layer, and MAC layer, and set a time limit for PDUs in each layer, and discard PDUs that are not transmitted within the time limit.
- this is not limited to this.
- the timer unit 123 and the discard unit 124 may be provided in the buffer of the DU.
- PDCP PDUs sent from the CU are stored in the DU's buffer before being processed in the DU's RLC layer, but a time limit is set for the PDUs in this buffer, and if the PDUs are not transmitted within the time limit, PDUs may be discarded.
- the notification unit 125, 225 notifies a layer higher than the layer that discarded the PDU that the PDU has been discarded, but the present invention is not limited to this. That is, the notification units 125 and 225 may notify a layer lower than the layer that discarded the PDU that the PDU has been discarded. Furthermore, when the gNB 100 is configured of a CU and a DU, the notification unit 125 may use U-plane signaling to notify the DU of PDUs discarded in the CU.
- the U-plane signaling may be, for example, DL User DATA (PDU Type 0) linked to the Downlink PDCP PDU.
- the notification unit 125, 225 is notified that the PDU has been discarded, but the notification is not limited to this.
- the notification may be made by the header adding units 126b and 226b.
- an identifier indicating that the PDU has been discarded may be added to a header such as a PDCP header.
- PDU set SN was described as an identifier indicating an identification number, but it is not limited to this.
- it may be an identifier indicating the sequence number of a PDU set.
- the function as an identification number can be realized by combining it with the PDU sequence number.
- the notification unit 125 may notify the UE 200 of the sequence number of the discarded PDU or PDU set.
- the notification unit 225 may notify the gNB 100 of the sequence number of the discarded PDU or PDU set.
- the UE 200 may notify the gNB 100 of the sequence number of the discarded PDU or PDU set using the PDCP status report. As a result, even if the PDU or PDU set is discarded, there is no possibility that the sequence numbers of the PDU or PDU set will deviate between the gNB 100 and the UE 200.
- the notification unit 125 may notify the UE 200 of the count value of the discarded PDU or PDU set.
- the notification unit 225 may notify the gNB 100 of the count value of the discarded PDU or PDU set.
- the UE 200 may notify the gNB 100 of the count value of the discarded PDU or PDU set using the PDCP status report.
- the count value is necessary for generating a security key stream (integrity, ciphering), and if the count value deviates, the security key streams will become inconsistent between the gNB 100 and the UE 200. Therefore, as described above, by notifying the count value of the discarded PDU or PDU set, it is possible to solve the problem of mismatched security key streams.
- the gNB 100 or UE 200 may perform L2 measurement when discarding a PDU, and statistically record the frequency or ratio of discarding PDUs.
- the UE 200 may notify the network of the frequency or rate at which recorded PDUs are discarded.
- configure, activate, update, indicate, enable, specify, and select may be used interchangeably.
- link, associate, correspond, and map may be used interchangeably; allocate, assign, and monitor.
- map may also be read interchangeably.
- each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices.
- the functional block may be realized by combining software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, These include, but are not limited to, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. I can't do it.
- a functional block (configuration unit) that performs transmission is called a transmitting unit or a transmitter. In either case, as described above, the implementation method is not particularly limited.
- FIG. 13 is a diagram showing an example of the hardware configuration of the device.
- the device may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
- the word “apparatus” can be read as a circuit, a device, a unit, etc.
- the hardware configuration of the device may include one or more of the devices shown in the figure, or may not include some of the devices.
- Each functional block of the device (see FIGS. 4, 6, and 10) is realized by any hardware element of the computer device or a combination of hardware elements.
- each function in the device is performed by loading predetermined software (programs) onto hardware such as the processor 1001 and memory 1002, so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls the memory This is realized by controlling at least one of data reading and writing in the storage 1002 and the storage 1003.
- predetermined software programs
- the processor 1001 for example, operates an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, and the like.
- CPU central processing unit
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
- programs program codes
- software modules software modules
- data etc.
- the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
- Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.
- the memory 1002 is a computer-readable recording medium, and includes at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be done.
- Memory 1002 may be called a register, cache, main memory, or the like.
- the memory 1002 can store programs (program codes), software modules, etc. that can execute a method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, such as an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a magneto-optical disk (such as a compact disk, a digital versatile disk, or a Blu-ray disk). (registered trademark disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc.
- Storage 1003 may also be called auxiliary storage.
- the above-mentioned recording medium may be, for example, a database including at least one of memory 1002 and storage 1003, a server, or other suitable medium.
- the communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, network controller, network card, communication module, etc.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
- FDD frequency division duplex
- TDD time division duplex
- the input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses for each device.
- the device includes hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA).
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- processor 1001 may be implemented using at least one of these hardwares.
- information notification is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
- information notification can be performed using physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof.
- DCI Downlink Control Information
- UCI Uplink Control Information
- RRC signaling e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)
- RRC signaling may also be referred to as RRC messages, such as RRC Connection Setup ) message, RRC Connection Reconfiguration message, etc.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New Radio NR
- W-CDMA registered trademark
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate systems and next-generation systems enhanced based on these.
- a combination of multiple systems for example, a combination of at least one of LTE and LTE-A with 5G
- 5G 5th generation mobile communication system
- FPA Future Radio Access
- NR New Radio
- W-CDMA registered trademark
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi
- the specific operations performed by the base station in this disclosure may be performed by its upper node.
- various operations performed for communication with a terminal are performed by the base station and other network nodes other than the base station (e.g., MME or It is clear that this could be done by at least one of the following: S-GW, etc.).
- MME Mobility Management Entity
- S-GW Serving GW
- Information, signals can be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.
- the input/output information may be stored in a specific location (for example, memory) or may be managed using a management table. Information that is input and output can be overwritten, updated, or added. The output information may be deleted. The input information may be sent to other devices.
- Judgment may be made using a value expressed by 1 bit (0 or 1), a truth value (Boolean: true or false), or a comparison of numerical values (for example, a predetermined value). (comparison with a value).
- notification of prescribed information is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.
- Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.
- software, instructions, information, etc. may be sent and received via a transmission medium.
- a transmission medium For example, if the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to When transmitted from a server or other remote source, these wired and/or wireless technologies are included within the definition of transmission medium.
- wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
- wireless technology infrared, microwave, etc.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of
- At least one of the channel and the symbol may be a signal.
- the signal may be a message.
- a component carrier may also be called a carrier frequency, cell, frequency carrier, etc.
- system and “network” are used interchangeably.
- radio resources may be indicated by an index.
- base station BS
- wireless base station fixed station
- NodeB NodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.
- a base station can accommodate one or more (eg, three) cells (also called sectors). If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is divided into multiple subsystems (e.g., small indoor base stations (Remote Radio Communication services can also be provided by Head: RRH).
- RRH Remote Radio Communication services
- cell refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is defined by a person skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a communication device, etc.
- the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like.
- the moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
- communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- each aspect/embodiment of the present disclosure may be applied.
- the mobile station may have the functions that the base station has.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be replaced with side channels.
- the mobile station in the present disclosure may be read as a base station.
- the base station may have the functions that the mobile station has.
- a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe.
- a subframe may further be composed of one or more slots in the time domain.
- a subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- the numerology may be a communication parameter applied to the transmission and/or reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transmission and reception. It may also indicate at least one of a specific filtering process performed by the device in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS subcarrier spacing
- TTI transmission time interval
- the numerology may also indicate at least one of a specific filtering process performed by the device in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- a slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may be a unit of time based on numerology.
- a slot may include multiple mini-slots. Each minislot may be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot.
- PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- multiple consecutive subframes may be called a TTI
- one slot or minislot may be called a TTI.
- at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
- the unit representing TTI may be called a slot, minislot, etc. instead of a subframe.
- TTI refers to, for example, the minimum time unit for scheduling in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- TTI is not limited to this.
- the TTI may be a unit of transmission time such as a channel-coded data packet (transport block), a code block, or a codeword, or may be a unit of processing such as scheduling or link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum time unit for scheduling.
- the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.
- a TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI that is shorter than the normal TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- long TTI e.g., normal TTI, subframe, etc.
- short TTI e.g., shortened TTI, etc.
- TTI with a time length of less than the long TTI and 1ms. It may also be read as a TTI having a TTI length of the above length.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of the new merology, and may be 12, for example.
- the number of subcarriers included in an RB may be determined based on newerology.
- the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs can be classified into physical resource blocks (Physical RBs: PRBs), sub-carrier groups (SCGs), resource element groups (Resource Element Groups: REGs), PRB pairs, RB pairs, etc. May be called.
- Physical RBs Physical RBs: PRBs
- SCGs sub-carrier groups
- REGs resource element groups
- PRB pairs RB pairs, etc. May be called.
- a resource block may be composed of one or more resource elements (RE).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- Bandwidth Part (also called partial bandwidth, etc.) refers to a subset of contiguous common resource blocks for a certain numerology in a certain carrier. good.
- the common RB may be specified by an RB index based on a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- One or more BWPs may be configured within one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- “cell”, “carrier”, etc. in the present disclosure may be replaced with "BWP”.
- radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB The number of subcarriers, the number of symbols within a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- connection refers to any connection or coupling, direct or indirect, between two or more elements and to each other. It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled.”
- the bonds or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be replaced with "access.”
- two elements may include one or more wires, cables, and/or printed electrical connections, as well as in the radio frequency domain, as some non-limiting and non-inclusive examples. , electromagnetic energy having wavelengths in the microwave and optical (both visible and non-visible) ranges.
- the reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot depending on the applied standard.
- RS Reference Signal
- the phrase “based on” does not mean “based solely on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to elements using the designations "first,” “second,” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed therein or that the first element must precede the second element in any way.
- determining may encompass a wide variety of operations.
- “Judgment” and “decision” include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, and inquiry. (e.g., searching in a table, database, or other data structure), and regarding an ascertaining as a “judgment” or “decision.”
- judgment and “decision” refer to receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and access.
- (accessing) may include considering something as a “judgment” or “decision.”
- judgment and “decision” refer to resolving, selecting, choosing, establishing, comparing, etc. as “judgment” and “decision”. may be included.
- judgment and “decision” may include regarding some action as having been “judged” or “determined.”
- judgment (decision) may be read as "assuming", “expecting", “considering”, etc.
- a and B are different may mean “A and B are different from each other.” Note that the term may also mean that "A and B are each different from C”. Terms such as “separate” and “coupled” may also be interpreted similarly to “different.”
- FIG. 14 shows an example of the configuration of the vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, an axle 2009, an electronic control unit 2010, Equipped with various sensors 2021 to 2029, an information service section 2012, and a communication module 2013.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- a steering wheel also referred to as a steering wheel
- the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and communication port (IO port) 2033. Signals from various sensors 2021 to 2027 provided in the vehicle are input to the electronic control unit 2010.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from various sensors 2021 to 2028 include current signals from current sensor 2021 that senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, and front wheel rotation speed signals obtained by air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal acquired by vehicle speed sensor 2024, acceleration signal acquired by acceleration sensor 2025, accelerator pedal depression amount signal acquired by accelerator pedal sensor 2029, and brake pedal sensor 2026. These include a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028.
- the Information Services Department 2012 provides various devices such as car navigation systems, audio systems, speakers, televisions, and radios that provide various information such as driving information, traffic information, and entertainment information, as well as one or more devices that control these devices. It consists of an ECU.
- the information service unit 2012 provides various multimedia information and multimedia services to the occupants of the vehicle 1 using information acquired from an external device via the communication module 2013 and the like.
- the driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g. GNSS, etc.), map information (e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.) ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors that prevent accidents and reduce the driver's driving burden. It consists of various devices that provide functions for the purpose and one or more ECUs that control these devices. Further, the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
- GPS Light Detection and Ranging
- map information e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.
- gyro systems e.g., IMU (Inertial Measurement Unit), INS (Iner
- the communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 1 via the communication port.
- the communication module 2013 communicates with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, left and right rear wheels 2008, which are included in the vehicle 2001, through the communication port 2033.
- Data is transmitted and received between the axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and the sensors 2021 to 2028.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, various information is transmitted and received with an external device via wireless communication.
- Communication module 2013 may be located either inside or outside electronic control unit 2010.
- the external device may be, for example, a base station, a mobile station, or the like.
- the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
- the communication module 2013 also receives the front wheel and rear wheel rotational speed signals acquired by the rotational speed sensor 2022, the front wheel and rear wheel air pressure signals acquired by the air pressure sensor 2023, and the vehicle speed sensor, which are input to the electronic control unit 2010.
- the shift lever operation signal acquired by the sensor 2027, the detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028 are also transmitted to the external device via wireless communication.
- the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service section 2012 provided in the vehicle. Communication module 2013 also stores various information received from external devices into memory 2032 that can be used by microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 controls the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, left and right front wheels 2007, and left and right rear wheels provided in the vehicle 2001. 2008, axle 2009, sensors 2021 to 2028, etc. may be controlled.
- various information traffic information, signal information, inter-vehicle information, etc.
- the radio base station or terminal of the embodiment may be configured as the radio base station or terminal shown in each section below.
- (Section 1) a transmitting/receiving unit that transmits and receives a data set composed of a plurality of data units whose importance levels are set to and from the terminal; a control unit that discards a data unit to which a lower importance level is set among the plurality of data units; Equipped with The control unit gives the data unit an identification number indicating a transmission order in a data set constituted by the data unit.
- Wireless base station a header added to the data unit includes an identifier indicating the identification number;
- the radio base station according to claim 1.
- the control unit discards the data unit in a layer lower than an SDAP (Service Data Adaptation Protocol) layer.
- the control unit notifies a layer higher than the layer that discarded the data unit that the data unit has been discarded.
- the radio base station according to claim 3. (Section 5)
- the control unit includes: setting a time limit for the data unit; discarding the data unit if the data unit cannot be transmitted within the time limit; The radio base station according to any one of claims 1 to 4.
- (Section 6) a transmitting/receiving unit that transmits and receives a data set composed of a plurality of data units whose importance levels are set to and from a wireless base station; a control unit that discards a data unit to which a lower importance level is set among the plurality of data units; Equipped with The control unit gives the data unit an identification number indicating a transmission order in a data set constituted by the data unit. terminal.
- B1, B2 Radio bearer 10 Radio communication system 20 NG-RAN 30 core network 100 gNB 110 Transmission/reception unit 120 Control unit 121 Mapping unit 122 Identification number assignment unit 123 Timer unit 124 Destruction unit 125 Notification unit 126a, 126b Header assignment unit 200 UE 210 Transmission/reception unit 220 Control unit 221 Mapping unit 222 Identification number assignment unit 223 Timer unit 224 Discard unit 225 Notification unit 226a, 226b Header assignment unit 300 UPF 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus 2001 Vehicle 2002 Drive section 2003 Steering section 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Left and right front wheels 2008 Left and right rear wheels 2009 Axle 2010 Electronic control section 2012 Information Service Department 2013 Communication module 2021 Current sensor 2022 Rotational speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor
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Abstract
Description
(1)無線通信システムの全体概略構成
図1は、実施形態に係る無線通信システム10の全体概略構成図である。無線通信システム10は、5G New Radio(NR)に従った無線通信システムであり、Next Generation-Radio Access Network 20(以下、NG-RAN20)、端末200(以下、UE200)、及びコアネットワーク30を含む。
図4は、gNB100、UE200の機能ブロック図である。gNB100は、送受信部110と、制御部120と、を備える。UE200は、送受信部210と、制御部220と、を備える。送受信部110、210は、複数の無線ベアラB1、B2を介してPDUを送受信する。制御部120、220は、PDUの送受信を制御する。例えば、複数の無線ベアラB1、B2のいずれかにQoSフローのマッピングを行う。
次に、無線通信システム10の動作について説明する。具体的には、gNB100またはUE200による、複数の無線ベアラB1、B2のいずれかにPDUをマッピングする動作と、PDUに当該PDUにより構成されるPDU setとの関係性を示す識別番号を設定する動作と、PDUに制限時間を設定し、制限時間内に送信できなかったPDUを破棄する動作と、について説明する。
(3.1.1)課題1
XRにおいては、同じQFIでマーキングされるPDUに対して、PDUの重要度に応じて異なるsub QFIが設定される。これにより、同じQoSフローにおいて送受信されるPDUであっても、PDUの重要度を異ならせることができる。一方で、無線ベアラとのマッピングはQoSフロー単位で行われるため、無線ベアラとのマッピングにPDUの重要度が反映されないという問題がある。
低遅延が要求されるXRにおいては、リソースが逼迫する場合などに、重要度が低いPDUを破棄することが検討されている。しかしながら、実際にPDUを破棄するにあたっては、PDUの破棄をサポートするために、破棄するPDUと当該PDUにより構成されるPDU setとの関係性を明確にする必要がある。
低遅延が要求されるXRにおいては、PDUに遅延要求条件が設定されることがある。遅延要求条件を達成できなかったPDUを再送するメリットはないため、当該PDUを破棄することが検討されている。
(3.2.1)動作例1
gNB100またはUE200は、PDUに設定される重要度に基づいて、複数の無線ベアラB1、B2のいずれかにPDUをマッピングする。PDUに設定される重要度は、sub QFIによって規定される。例えば図3に示すように、重要度が高いI-flameのPDU 1、PDU 5にはsub QFI=1が設定され、重要度が低いP-flameのPDU 2、PDU 3、PDU 4及びB-flameのPDU 6、PDU 7、PDU 8にはsub QFI=4が設定される。すなわち、重要度が高いPDUはsub QFI=1でマーキングされ、重要度が低いPDUはsub QFI=4でマーキングされる。
gNB100またはUE200は、PDUに対して、当該PDUにより構成されるデータセットであるPDU setとの関係性を示す識別番号を付与する。具体的には、識別番号付与部122または識別番号付与部222が、当該PDUにより構成されるデータセットであるPDU setにおける送信順を示す識別番号を付与する。
gNB100またはUE200は、PDUに制限時間を設定する。具体的には、タイマ部123またはタイマ部223が、PDUに制限時間を設定する。制限時間は、例えばPDUの遅延要求条件に基づいて設定される。
上述した実施形態のgNB100またはUE200は、PDUに設定される重要度に基づいて、複数の無線ベアラB1、B2のいずれかにPDUをマッピングするので、複数の無線ベアラB1、B2とのマッピングにおいて、PDUの重要度を反映させることができる。
以上、実施形態に沿って本発明の内容を説明したが、本発明はこれらの記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
実施形態の無線基地局または端末は、下記の各項に示す無線基地局または端末として構成されてもよい。
(第1項)
端末との間で、重要度が設定される複数のデータユニットにより構成されるデータセットを送受信する送受信部と、
前記複数のデータユニットのうち低い重要度が設定されるデータユニットを破棄する制御部と、
を備え、
前記制御部は、前記データユニットに対して、当該データユニットにより構成されるデータセットにおける送信順を示す識別番号を付与する、
無線基地局。
(第2項)
前記データユニットに付与されるヘッダは、前記識別番号を示す識別子を含む、
請求項1に記載の無線基地局。
(第3項)
前記制御部は、SDAP(Service Data Adaptation Protocol)レイヤよりも下位のレイヤにおいて、前記データユニットを破棄する、
請求項1または2に記載の無線基地局。
(第4項)
前記制御部は、前記データユニットを破棄したレイヤよりも上位のレイヤに対して、前記データユニットを破棄したことを通知する、
請求項3に記載の無線基地局。
(第5項)
前記制御部は、
前記データユニットに制限時間を設定し、
前記制限時間内に前記データユニットを送信できなかった場合、前記データユニットを破棄する、
請求項1乃至4のいずれかに記載の無線基地局。
(第6項)
無線基地局との間で、重要度が設定される複数のデータユニットにより構成されるデータセットを送受信する送受信部と、
前記複数のデータユニットのうち低い重要度が設定されるデータユニットを破棄する制御部と、
を備え、
前記制御部は、前記データユニットに対して、当該データユニットにより構成されるデータセットにおける送信順を示す識別番号を付与する、
端末。
10 無線通信システム
20 NG-RAN
30 コアネットワーク
100 gNB
110 送受信部
120 制御部
121 マッピング部
122 識別番号付与部
123 タイマ部
124 破棄部
125 通知部
126a、126b ヘッダ付与部
200 UE
210 送受信部
220 制御部
221 マッピング部
222 識別番号付与部
223 タイマ部
224 破棄部
225 通知部
226a、226b ヘッダ付与部
300 UPF
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
1007 バス
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 左右の前輪
2008 左右の後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM, RAM)
2033 通信ポート
Claims (6)
- 端末との間で、重要度が設定される複数のデータユニットにより構成されるデータセットを送受信する送受信部と、
前記複数のデータユニットのうち低い重要度が設定されるデータユニットを破棄する制御部と、
を備え、
前記制御部は、前記データユニットに対して、当該データユニットにより構成されるデータセットにおける送信順を示す識別番号を付与する、
無線基地局。 - 前記データユニットに付与されるヘッダは、前記識別番号を示す識別子を含む、
請求項1に記載の無線基地局。 - 前記制御部は、SDAP(Service Data Adaptation Protocol)レイヤよりも下位のレイヤにおいて、前記データユニットを破棄する、
請求項1に記載の無線基地局。 - 前記制御部は、前記データユニットを破棄したレイヤよりも上位のレイヤに対して、前記データユニットを破棄したことを通知する、
請求項3に記載の無線基地局。 - 前記制御部は、
前記データユニットに制限時間を設定し、
前記制限時間内に前記データユニットを送信できなかった場合、前記データユニットを破棄する、
請求項1に記載の無線基地局。 - 無線基地局との間で、重要度が設定される複数のデータユニットにより構成されるデータセットを送受信する送受信部と、
前記複数のデータユニットのうち低い重要度が設定されるデータユニットを破棄する制御部と、
を備え、
前記制御部は、前記データユニットに対して、当該データユニットにより構成されるデータセットにおける送信順を示す識別番号を付与する、
端末。
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2022/028537 WO2024018641A1 (ja) | 2022-07-22 | 2022-07-22 | 無線基地局及び端末 |
| JP2024534908A JPWO2024018641A1 (ja) | 2022-07-22 | 2022-07-22 |
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/JP2022/028537 WO2024018641A1 (ja) | 2022-07-22 | 2022-07-22 | 無線基地局及び端末 |
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| JP (1) | JPWO2024018641A1 (ja) |
| WO (1) | WO2024018641A1 (ja) |
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2022
- 2022-07-22 WO PCT/JP2022/028537 patent/WO2024018641A1/ja not_active Ceased
- 2022-07-22 JP JP2024534908A patent/JPWO2024018641A1/ja active Pending
Non-Patent Citations (4)
| Title |
|---|
| "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on XR (Extended Reality) and media services (Release 18)", 3GPP STANDARD; TECHNICAL REPORT; 3GPP TR 23.700-60, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. V0.2.0, 22 April 2022 (2022-04-22), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, pages 1 - 131, XP052146076 * |
| "3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on XR (Extended Reality) and media services (Release 18)", 3GPP STANDARD; TECHNICAL REPORT; 3GPP TR 23.700-60, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. V0.3.0, 31 May 2022 (2022-05-31), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, pages 1 - 218, XP052182634 * |
| NTT DOCOMO, INC.: "Discussion on XR-awareness", 3GPP DRAFT; R2-2207197, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20220817 - 20220826, 10 August 2022 (2022-08-10), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052260520 * |
| RAN WG1: "Reply LS on UE Power Saving for XR and Media Services", 3GPP DRAFT; R2-2206807, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. e-Meeting; 20220509 - 20220520, 27 May 2022 (2022-05-27), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052156831 * |
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