WO2021059538A1 - セッション管理装置、ユーザプレーン装置、及びアクセス移動管理装置 - Google Patents
セッション管理装置、ユーザプレーン装置、及びアクセス移動管理装置 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/12—Arrangements providing for calling or supervisory signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
Definitions
- the present invention relates to a network device in a communication system.
- 5G or NR New Radio
- 5G wireless communication system
- 5G various wireless technologies are being studied in order to satisfy the requirement that the delay of the wireless section be 1 ms or less while achieving a throughput of 10 Gbps or more.
- 5G Core Network 5G Core Network
- EPC Evolved Packet Core
- LTE Long Term Evolution
- E-UTRAN Radio Access Network
- a network architecture including NG-RAN (Next Generation Access Network) corresponding to (Evolved Universal Terrestrial Radio Access Network) is being studied.
- NG-RAN may be expressed as 5G-AN, RAN or gNB.
- the 5G system also supports TSC (Time Sensitive Communication) specified in IEEE P802.1Qcc (Non-Patent Document 1).
- TSC Time Sensitive Communication
- the 5G system functions as a TSN (Time Sensitive Networking) bridge.
- TSCAI TSC Assistance Information
- SMF SMF
- NG-RAN NG-RAN
- the gNB which is an NG-RAN, can grasp the TSN traffic pattern by TSCAI and perform efficient scheduling and the like.
- Non-Patent Document 1 when a drift or the like occurs between the TSN time and the 5G time in a certain TSN working domain, the core NW notifies the NG-RAN of the corrected TSCAI parameter.
- the TSN time domain may be referred to as the "time domain". In this specification, it is assumed that TSCAI is applied for each TSN stream.
- the 5G system supports a plurality of TSN time domains (TSN working domains), but the above-described modified TSCAI is a specific TSCAI of a plurality of TSN streams belonging to a plurality of TSN time domains to which the TSCAI should be applied. Needs to be applied only to TSN streams.
- the present invention has been made in view of the above points, and an object of the present invention is to provide a technique capable of applying TSC support information only to a specific TSN stream.
- a receiver that receives time comparison information between the TSN time and 5G time of a certain TSN time domain and identification information of the TSN time domain from the user plane device, and A session management device including a transmission unit that transmits TSC support information determined based on the time comparison information and TSN stream identification information to the base station device for each one or more TSN streams belonging to the TSN time domain.
- a technology that enables TSC support information to be applied only to a specific TSN stream is provided.
- Existing technology may be used as appropriate in the operation of the communication system according to the embodiment of the present invention.
- the existing technology is, for example, existing LTE or existing 5G, but is not limited to existing LTE or existing 5G.
- node names, signal names, etc. described in the 5G standard are used at present, but the node names, signal names, etc. having the same functions as these are used. May be called by a different name.
- FIG. 1 is a diagram for explaining a communication system (which may be referred to as a communication network) according to an embodiment of the present invention.
- the communication system is composed of a UE 10 (may be called a user device 10 or a terminal 10) and a plurality of network nodes.
- a UE 10 may be called a user device 10 or a terminal 10
- a plurality of network nodes may be connected to each function, but one network node may realize a plurality of functions, or a plurality of network nodes may realize one function.
- the "connection" described below may be a logical connection or a physical connection.
- UPF50, AMF20, and SMF40 are examples of network nodes (which may be called network devices) that form a core network of a communication system (here, 5G), respectively. Communication between the RAN 30 and the UPF 50 is performed via the core network.
- 5G a communication system
- the RAN (Radio Access Network) 30 is a network node having a wireless access function, and is connected to a UE 10, an AMF (Access and Mobility Management Function) 20, and an UPF (User plane function) 50.
- the RAN 30 may be referred to as a gNB 30 or a base station device 30.
- AMF20 is a network node having functions such as RAN interface termination, NAS (Non-Access Stratum) termination, registration management, connection management, reachability management, and mobility management.
- the AMF 20 may be called an access movement management device.
- the UPF50 is a network node having functions such as a PDU (Protocol Data Unit) session point to the outside interconnected with a DN (Data Network), packet routing and forwarding, and user plane quality of service (QoS) handling, and is a user. Send and receive data.
- UPF50 and DN constitute a network slice.
- a plurality of network slices are constructed.
- one UPF50 corresponds to one network slice, but one UPF50 may operate a plurality of network slices. Further, the UPF 50 may be referred to as a user plane device.
- the UPF50 is physically, for example, one or a plurality of computers (servers, etc.), and the hardware resources (CPU, memory, hard disk, network interface, etc.) of the computers can be logically integrated / divided. Multiple resources can be regarded as a resource pool, and each resource can be used as a network slice in the resource pool.
- the operation of the network slice by the UPF50 means, for example, management of the association between the network slice and the resource, start / stop of the resource, monitoring of the operation status of the resource, and the like.
- AMF20 includes UE10, RAN30, SMF (Session Management function) 40, NSSF (Network Slice Selection Function), NEF (Network Exposure Function), NRF (Network Repository Function), AUSF (Authentication Server Function), PCF (Policy Control Function). , Connected with AF (Application Function).
- AMF, SMF, NSSF, NEF, NRF, AUSF, PCF70, AF60 are network nodes that are interconnected via their respective service-based interfaces, Namf, Nsmf, Nnssf, Nnef, Nnrf, Nausf, Npcf, Naf. is there. In this embodiment, AF60 corresponds to TSN AF, which will be described later.
- the SMF40 is a network node having functions such as session management, UE IP (Internet Protocol) address allocation and management, DHCP (Dynamic Host Configuration Protocol) function, ARP (Address Resolution Protocol) proxy, and roaming function.
- the SMF 40 may be referred to as a session management device.
- NEF is a network node that has the function of notifying other NFs (Network Functions) of capabilities and events.
- the NSSF is a network node having functions such as selecting a network slice to be connected to the UE, determining an allowed NSSAI (Network Slice Selection Assistance Information), determining an NSSAI to be set, and determining an AMF set to be connected to the UE. ..
- the PCF 70 is a network node having a function of controlling network policy.
- the AF60 is a network node having a function of controlling an application server.
- the communication system (5G system) supports TSN time synchronization as shown in FIG. 2 ( Figure 5.27.1-1 of Non-Patent Document 1).
- a 5G system that supports TSN time synchronization corresponds to the "time aware system" of IEEE 802.1AS.
- TSN translator TT
- the translator synchronizes with 5G GM (5G internal system clock).
- FIG. 3 shows TSN AF60, which is an application node related to TSN.
- a gPTP message is used to deliver the TSN clock.
- the gPTP message includes a time stamp (precise origin timestamp) at the time of sending the gPTP message, a correction field, and the like.
- the gPTP message sent from the TSN end station or the like of a certain TSN time domain is received by the UPF50, and an ingress time stamp (TSi) is added to the gPTP message by NW-TT in the UPF50.
- the NW-TT may be a function built in the UPF50 or a function outside the UPF50.
- the gPTP message is transmitted to the UE 10 using a PDU session for communication of the UE 10.
- the UE 10 transmits the received gPTP message to the DS-TT, and the DS-TT generates an egress time stamp (TSe) for the gPTP message, and uses it as "TSe-TSi" for the residence time of the gPTP message in the 5G system. residence time) is calculated.
- TSe egress time stamp
- the DS-TT puts the residence time in the correction Field of the gPTP message and transmits it to the TSN end station or the like.
- the DS-TT may be a function built in the UE 10 or a function outside the UE 10.
- FIG. 5 shows an example in which gPTP messages for two TSN time domains are transmitted in one PDU session. Since the gPTP message includes a domain number for identifying the TSN time domain, the end station receiving the gPTP message can identify which TSN time domain the gPTP message is by the domain number.
- the above TSN clock and time stamp distribution are carried out between the UE 10 and the UPF 50 for each TSN time domain.
- the gPTP messages of all the TSN time domains are transmitted to the UE 10 by the same one PDU session.
- packets not limited to gPTP messages form a TSN stream, and the TSN stream is transmitted from the TSN end station.
- One or more TSN streams belong to a TSN time domain.
- the TSN stream may be called a TSC stream.
- TSCAI TSC Assistance Information
- the gNB which is the RAN 30 in the present embodiment, can grasp the TSN traffic pattern by TSCAI and perform efficient scheduling.
- TSCAI includes Flow Direction, Periodicity, and Burst Arrival Time.
- the Flow Direction indicates whether the target TSC flow (in the present embodiment, "TSC flow" may be referred to as a TSN stream) is an uplink or a downlink.
- Periodicity indicates the time interval (period) between two bursts in a series of traffic of the corresponding TSN stream.
- Burst Arrival Time indicates the arrival time of the first data burst of a series of traffic to RAN30 on the uplink or downlink.
- the reference of Burst Arrival Time and Periodicity is 5G clock (5G time)
- SMF40 changes the reference of Burst Arrival Time and Periodicity from the TSN clock which is the reference of the TSN stream to the 5G clock.
- TSN AF60 may perform this mapping.
- the time of the 5G clock (eg, the clock provided by the UPF50) is advanced by ⁇ T from the time of the TSN clock (eg, the clock provided by the TSN end station).
- the SMF 40 sets the Burst Arrival Time in the 5G clock to T + ⁇ T.
- Non-Patent Document 1 when a drift (for example, the above ⁇ T is changed) occurs between the TSN time (TSN time) and the 5G time (5G time) in a certain TSN time domain, The UPF50 notifies the SMF40 of the offset, and the SMF40 notifies the RAN30 of the TSCAI parameter modified based on the offset.
- the TSCAI parameter here is, for example, Burst Arrival Time, but it is not limited to Burst Arrival Time.
- the “offset” is the difference (corrected ⁇ T) between the TSN time and the 5G time, but is not limited thereto.
- the "offset” may be the amount of deviation from ⁇ T before correction.
- the gPTP messages of all the TSN time domains are transmitted to the UE 10 by the same one PDU session. Since there is no reason to treat each of these plurality of TSN time domains as different QoS, it is assumed that in practice, all gPTP messages of all these TSN time domains are transmitted in one QoS flow.
- the gPTP message belonging to a single TSN time domain is an example of a TSN stream. Even with a TSN stream formed by packets not limited to gPTP messages, it can be assumed that a plurality of TSN streams of a plurality of TSN time domains are transmitted in one QoS flow.
- the modified TSCAI parameter above needs to be applied only to the specific TSN stream to which it should be applied.
- the modified TSCAI parameter cannot be applied only to a specific TSN stream in the prior art.
- TSCAI is applied to each TSN stream as in the present embodiment, the above-mentioned problem occurs not only in the notification of the modified TSCAI parameter but also in the notification of the TSCAI parameter before the modification.
- Non-Patent Document 1 the drift between the TSN time and the 5G time in a certain TSN time domain is taken into consideration, but the change in the progress is not taken into consideration. There is also the problem that the Periodicity cannot be modified.
- the configuration of TSCAI can be set for each QoS flow + TSN stream (identification information of TSN stream) on N2, and on N3, in the PDU Session user plane protocol.
- TSN stream identification information can be set.
- the change in the difference in the way of proceeding is taken into consideration.
- One QoS flow in this embodiment includes one or more TSN streams belonging to one or more TSN time domains.
- one QoS flow may include TSN streams A-1 and TSN streams A-2 belonging to the TSN time domain A, and TSN streams B-1 and TSN streams B-2 belonging to the TSN time domain B.
- TSCAI is information for each TSN stream.
- TSCAI_A-1 is provided for TSN stream A-1
- TSCAI_A-2 is provided for TSN stream A-2.
- the SMF 40 determines the TSCAI parameter based on the information acquired from, for example, the TSN AF60.
- the SMF 40 may determine the TSCAI parameters based on the information (offset, etc.) reported by the UPF 50.
- the TSN AF60 transmits the TSN time domain number to which the TSN stream belongs and the TSCAI in the TSN time to the SMF40 via the PCF70 for a certain TSN stream.
- the SMF 40 holds and manages binding information (correspondence information) between the TSN stream identifier and the time domain number for each 1 UE and 1 UPF.
- the TSN AF60 transmits, for example, the domain number related to the TSN stream to be transmitted and the TSCAI in the TSN time to the PCF70.
- the PCF 70 transmits the domain number received from the TSN AF60 and the TSCAI in the TSN time to the SMF 40 as a PCC rule.
- the SMF 40 holds (manages) the information of the association (binding) between the TSN stream identifier and the time domain number for each TSN stream including the TSN stream. Management of this association is performed for each "1 UE / 1 UPF". Further, the SMF 40 maps the TSCAI in the TSN time to the TSCAI in the 5G time, and holds (manages) the TSCAI (5G time) in association with the corresponding TSN stream identifier.
- SMF40 requests UPF50 to report the offset (time difference between 5G time and TSN time) and the difference in progress between 5G time and TSN time (hereinafter referred to as "difference in progress"). Send a message.
- the difference in the way of proceeding is called “cumulative rate Ratio”.
- the difference between the offset and the way of traveling may be collectively referred to as time comparison information.
- the above message is, for example, a PFCP Session Establishment Request when establishing a PDU session or a PFCP Session Modification Request when modifying a PDU session, but is not limited thereto.
- the UPF 50 may report the difference between the offset and the advance to the SMF 40 at its own discretion without making the request of S104.
- the UPF50 may report the offset for each TSN time domain detected in the corresponding PDU session, the difference in the way of traveling, or both, even if neither the drift detection nor the change detection of the difference in the way of traveling is detected.
- UPF50 detects a drift between TSN time and 5G time in a certain TSN time domain in the corresponding PDU session for UE10. Alternatively, in S105, the UPF50 detects a change in the difference in progress in a certain TSN time domain in the corresponding PDU session for the UE 10. Alternatively, in S105, the UPF50 detects a change in the difference between drift and progress in a certain TSN time domain in the corresponding PDU session for UE10.
- the UPF50 may detect the drift by the fluctuation of the difference between the time stamp given by the NW-TT and the TSN source time stamp in the gPTP message of the TSN time domain, or based on the information from the TSN AF60.
- Drift may be detected, or drift may be detected by other methods.
- the method for detecting the change in the difference in the way of traveling may be any method, and for example, the change in the difference in the way of traveling may be detected based on the above time stamp.
- the UPF50 obtains the TSN time domain number (domain number) from which the drift or the change in the advance difference (or both) is detected from the gPTP message, and includes the difference between the domain number and the offset and the advance. Send the message to SMF40.
- This message is, for example, PFCPSessionReportRequest.
- the domain number is extracted from the corresponding gPTP message.
- the UPF50 may transmit the domain number and the offset when the drift is detected, and may transmit the difference between the domain number and the advance when the change in the difference in the advance is detected.
- the SMF 40 Upon receiving the message, the SMF 40 receives a TSCAI parameter (eg, one or more TSN streams) for all TSN streams (one or more TSN streams) for the UE 10 bound to the domain number received from the UPF 50 based on the difference between the offset and the way forward. Burst Arrival Time and Periodicity) are determined (this "determination” also includes “update"), and a message including the TSCAI parameter and TSN stream identifier for each TSN stream is transmitted to AMF20 (S107). This transmission is performed, for example, by step 3b (Namf_Communication_N1N2MessageTransfer) of PDU session modification (Non-Patent Document 2, Figure 4.3.3.2-1).
- a TSCAI parameter eg, one or more TSN streams
- the AMF 20 transmits a message including a TSN stream identifier and a TSCAI parameter (eg, Burst Arrival Time, Periodicity) to the RAN 30 for each TSN stream to which the TSCAI parameter is applied.
- TSCAI parameter eg, Burst Arrival Time, Periodicity
- This transmission is performed, for example, by step 4 (N2 PDU Session Request) of PDU session modification (Non-Patent Document 2, Figure 4.3.3.2-1).
- allocate means to reserve the time slot for the Burst data transmission.
- the transmitter of RAN30 transmits Burst data to UE10 or UPF50 in the reserved time slot.
- FIG. 8 shows a change from Non-Patent Document 1 (excerpt from TS38.501).
- the UPF updates the cumulative rateRatio to SMF.
- UPF50 becomes SMF40 when the cumulative rateRatio (difference in progress) changes. It is stipulated that the cumulative rateRatio should be updated.
- TSCAI is signaled to the 5G-AN per TSN stream. This apps also to the case when multiple TSN streams are forwarded via the same QoS flow in the same PDU session", TSCAI is 5G for each stream. -It is stipulated that the AN will be notified.
- the UPF updates the offset and the cumulative rateRatio As described in “belonging to each TSN working domain within the same UPF, calculates revised TSCAIs, and triggers PDU session modification (s)", UPF50 sets the offset and cumulative rateRatio for each TSN time domain to SMF40. It is stipulated that the SMF40 identifies the TSN stream belonging to the TSN time domain for each TSN time domain in the same UE and the same UPF, calculates the updated TSCAI, and activates the PDU session modification (s). Will be done.
- FIG. 9 to 11 are examples of specification changes of the parts corresponding to S101 and S102 of FIG. 7, and show changes from Non-Patent Document 7 (excerpt of TS23.503).
- Figure 9 is an excerpt of 5.3.1 Interactions between PCF and AF, "TSN AF provides burst arrival time (in reference to TSN GM), periodicity (in reference to TSN GM), flow direction, and time domain identifier needed for As described in "TSCAI determination (as described in clauses 5.27 and 5.28 of TS 23.501 [2]).", TSN AF60 is required for TSCAI determination, burst arrival time (in reference to TSN GM), periodicity (in reference). to TSN GM), flow direction, and time domain identifier are provided.
- FIG. 10 (a) shows the TSN AF Parameters input from the TSN AF60 to the PCF70
- FIG. 10B shows the TSNAF QoS container provided from the PCF70 to the SMF40.
- FIG. 11 is an explanation of The TSN AF container.
- FIG. 12 defines Reporting of the offset and the cumulative rateRatio between TSN time and 5G time to the SMF.
- the SMF40 can request the UPF50 to start or stop reporting the offset between the TSN time and the 5G time and the cumulative rate Ratio.
- the UPF50 reports, for example, the offset value for detecting the drift and the cumulative rateRatio for detecting the change of all the domain numbers to the SMF40 together with the corresponding domain number by the PFCPSessionReportprocedure. Details are as described in FIG.
- FIG. 13 shows the details of the information element of PFCP Session Establishment Request, and Create PTR is added.
- FIG. 14 shows the details of Create PDR IE, and the PTR ID is added.
- FIG. 15 is an Ethernet Packet Filter IE within PFCP Session Establishment Request, which shows that EtherType has been added. This EtherType IE is a key when UPF50 performs DPI to detect the value or field of the gPTP message.
- FIG. 16 shows the details of Create PTR IE within PFCP Session Establishment Request.
- FIG. 17 shows the information element of PFCPSessionModificationRequest, and RemovePTR, CreatePTR, and UpdatePTR are added.
- FIG. 18 shows the details of Update PDR IE within PFCP Session Modification Request, and the PTR ID is added.
- FIG. 19 shows the details of Update PTR IE, and
- FIG. 20 shows the details of Remove PTR IE.
- FIG. 21 is an information element of PFCPSessionReportRequest, and PTPReport is added.
- FIG. 22 shows the details of PTP Report IE, and it is stipulated that a set of domain number, offset, and cumulative rateRatio is notified as Time comparison information.
- 23 to 27 show details of ReportType, EtherType, PTRID, PTPReportingTriggers, DomainNumber, TimeOffset, and TimeRateRatio.
- FIGS. 28 to 30 show changes from Non-Patent Document 2 (excerpt from TS23.502).
- FIG. 28 is a change of 4.3.2.2.1 of Non-Patent Document 2, and shows a change of step 10a of the UE-requested PDU Session Establishment shown in Figure 4.3.2.2.1-1.
- the N4SessionEstablishment / ModificationRequest includes a rule for detecting offset drift and cumulative rateRatio change.
- FIG. 29 is a modification of step 1d of UE or network requested PDU Session Modification shown in Figure 4.3.3.2-1 of Non-Patent Document 2, and as shown in FIG. 29, for example, UPF50 reports a drift or cumulative rate ratio change. When this happens, SMF requested modification is triggered to update the TSCAI.
- FIG. 30 is a modification of step 2a of UE or network requested PDU Session Modification shown in Figure 4.3.3.2-1 of Non-Patent Document 2, and when SMF40 decides to use TSCAI in the PDU session, N4SessionEstablishment / Include rules for drift and cumulative rateRatio change detection in ModificationRequest.
- Step 11 of Figure 4.3.2.2.1-1 UE-requested PDU Session Establishment
- N1N2MessageTransfer shown in step 3b of 3.2-1 (UE or network requested PDU Session Modification) is used.
- N1N2MessageTransferReqData including the TSN stream identifier and the TSCAI parameter is sent from the SMF 40 to the AMF 20.
- the TSN stream identifier and the TSCAI parameter are transmitted as a list having "a set of the TSN stream identifier and the TSCAI parameter" for each of the one or more TSN stream identifiers.
- sending in the form of a list is an example, and may be sent by a method other than the list.
- N1N2MessageTransferReqData includes N2InfoContainer.
- N2InfoContainer contains N2SmInformation.
- N2SmInformation includes N2InfoContent.
- N2InfoContent includes ngapData.
- Non-Patent Document 5 (TS38.413) regarding PDU Session Resource Setup Request Transfer IE or PDU Session Resource Modify Request Transfer IE, which are the contents of NGAP IE.
- PDU Session Resource Setup Request Transfer IE or PDU Session Resource Modify Request Transfer IE which are the contents of NGAP IE.
- FIGS. 31 to 35 show an example of modification 1 from Non-Patent Document 5 (excerpt from TS38.413).
- FIG. 31 shows the changed part in 8.2.1.2 Successful Operation of PDU session resource setup executed between AMF20 and RAN30.
- Traffic Characteristics list IE is included in the PDU Session Resource Setup Request Transfer IE of the PDU SESSION RESOURCE SETUP REQUEST message for each QoS flow requesting setup.
- the RAN 30 must consider Traffic Characteristics list IE.
- FIG. 32 shows the changed part in 8.2.3.2 Successful Operation of PDU session resource modify executed between AMF20 and RAN30.
- the PDU Session Resource Modify Request transmitted from the AMF 20 to the RAN 30, if the Traffic Characteristics list IE is included in the PDU Session Resource Modify Request Transfer IE of the PDU SESSION RESOURCE MODIFY REQUEST message, the RAN 30 considers the Traffic Characteristic list. Must.
- FIG. 33 is a detail of PDU Session Resource Setup Request Transfer IE, and a description of Traffic Characteristics is described.
- FIG. 34 shows that the Traffic Characteristic item in the Traffic Characteristics list consists of a Tsn Stream identifier and a Traffic Characteristic.
- FIG. 35 shows the details of the Tsn Stream identifier and Traffic Characteristic.
- FIGS. 36 to 37 show an example of modification 2 from Non-Patent Document 5 (excerpt from TS38.413).
- FIG. 36 shows that the TSC Assistance information List including the TSC Assistance information for each TSN stream is included in the GBR QoS Flow Information transmitted from the AMF 20 to the RAN 30.
- FIG. 37 shows details of TSC Assistance Information and Tsn Stream identifier.
- FIGS. 38 to 40 show examples of changes from Non-Patent Document 6 (excerpt from TS38.415).
- the DLPDU SESSION INFORMATION frame can include the Tsn Stream identifier (TSI) field.
- the RAN 30 can identify the TSN stream to which the received packet belongs by the TSI.
- FIG. 39 shows the DL PDU SESSION INFORMATION (PDU Type 0) Format.
- FIG. 40 shows the details of the Tsn Stream identifier (TSI).
- the modifications shown in FIGS. 38 to 40 are not essential. Since the RAN 30 can grasp the Burst Arrival Time, Periodicity, etc. for each TSN stream based on the TSCAI for each TSN stream, the RAN 30 processes the packet for each TSN stream without making the modifications shown in FIGS. 38 to 40. be able to.
- An example of the functional configuration of the device 50 will be described.
- the TSN AF60 and PCF70 also have the same configurations as those shown in FIGS. 41 to 45.
- FIG. 41 is a diagram showing an example of the functional configuration of the base station apparatus 30.
- the base station apparatus 30 includes a transmission unit 310, a reception unit 320, a setting unit 330, and a control unit 340.
- the functional configuration shown in FIG. 41 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 310 includes a function of generating a signal to be transmitted and transmitting the signal to the terminal side (Uu side) / core network side.
- the receiving unit 320 includes a function of receiving various signals from the terminal side (Uu side) / core network side and acquiring information of, for example, a higher layer from the received signals.
- the transmitter 310 and the receiver 320 may be referred to as a transmitter and a receiver, respectively.
- the setting unit 330 stores the setting information in the storage device (storage unit) and reads it out from the storage device as needed.
- the control unit 340 controls the base station device 30.
- the receiving unit 320 receives the message including the TSC support information and the identification information of the TSN stream to which the TSC support information is applied from the network device, and the transmitting unit 310 receives the TSC support information based on the TSC support information. Send data.
- FIG. 42 is a diagram showing an example of the functional configuration of the access movement management device 20.
- the access movement management device 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in FIG. 42 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 210 includes a function of generating a signal to be transmitted and transmitting the signal to the network.
- the receiving unit 220 includes a function of receiving various signals and acquiring information of, for example, a higher layer from the received signals.
- the transmitter 210 and the receiver 220 may be referred to as a transmitter and a receiver, respectively.
- the setting unit 230 stores the setting information in the storage device (storage unit) and reads it out from the storage device as needed.
- the control unit 240 controls the access movement management device 20.
- FIG. 43 is a diagram showing an example of the functional configuration of the session management device 40.
- the session management device 40 includes a transmission unit 410, a reception unit 420, a setting unit 430, and a control unit 440.
- the functional configuration shown in FIG. 43 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 410 includes a function of generating a signal to be transmitted and transmitting the signal to the network.
- the receiving unit 420 includes a function of receiving various signals and acquiring information of, for example, a higher layer from the received signals.
- the transmitter 410 and the receiver 420 may be referred to as a transmitter and a receiver, respectively.
- the setting unit 430 stores the setting information in the storage device (storage unit) and reads it out from the storage device as needed.
- the control unit 440 controls the session management device 40.
- FIG. 44 is a diagram showing an example of the functional configuration of the user plane device 50.
- the user plane device 50 includes a transmission unit 510, a reception unit 520, a setting unit 530, and a control unit 540.
- the functional configuration shown in FIG. 44 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
- the transmission unit 510 includes a function of generating a signal to be transmitted and transmitting the signal to the network.
- the receiving unit 520 includes a function of receiving various signals and acquiring information of, for example, a higher layer from the received signals.
- the transmitter 510 and the receiver 520 may be referred to as a transmitter and a receiver, respectively.
- the setting unit 530 stores the setting information in the storage device (storage unit) and reads it out from the storage device as needed.
- the control unit 540 controls the user plane device 50.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
- broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these. I can't.
- a functional block that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
- transmitting unit transmitting unit
- transmitter transmitter
- the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, the TSN AF60, the PCF70, and the like in one embodiment of the present disclosure may function as computers that perform the processing of the present disclosure.
- FIG. 41 is a diagram showing an example of hardware configurations such as a base station device 30, an access movement management device 20, a session management device 40, a user plane device 50, a TSN AF60, and a PCF70 according to an embodiment of the present disclosure. ..
- the above-mentioned base station device 30, access movement management device 20, session management device 40, user plane device 50, and the like are physically composed of a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, and the like. It may be configured as a computer device including an output device 1006, a bus 1007, and the like.
- the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, and the like may be virtual machines, respectively.
- the word “device” can be read as a circuit, device, unit, etc.
- the hardware configuration of the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, and the like may be configured to include one or more of the devices shown in the figure, or a part thereof. It may be configured without including the device of.
- Each function in the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, etc. is performed by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002. It is realized by the processor 1001 performing an operation, controlling the communication by the communication device 1004, and controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
- CPU Central Processing Unit
- control unit 340, control unit 440, control unit 540, and the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
- a program program code
- the control unit of each device may be stored in the storage device 1002 and realized by a control program that operates in the processor 1001.
- Processor 1001 may be implemented by one or more chips.
- the program may be transmitted from the network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
- the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
- -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like.
- the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
- 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, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
- 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 storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, etc. include a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), and a PLD (Programmable). It may be configured to include hardware such as Logic Device) and FPGA (Field Programmable Gate Array), and a part or all of each functional block may be realized by the hardware.
- processor 1001 may be implemented using at least one of these hardware.
- At least the session management device, the user plane device, and the access movement management device shown in the following items 1 to 6 are provided.
- (Section 1) A receiver that receives the time comparison information between the TSN time and the 5G time of a certain TSN time domain and the identification information of the TSN time domain from the user plane device.
- a session management device including a transmission unit that transmits TSC support information determined based on the time comparison information and TSN stream identification information to the base station device for each one or more TSN streams belonging to the TSN time domain. ..
- the time comparison information is the time offset between the TSN time and the 5G time in the TSN time domain, the difference in the way of traveling between the TSN time and the 5G time in the TSN time domain, or the time offset and the advance.
- the receiver receives the time comparison information and the TSN time domain.
- a control unit that detects a change in drift or progress difference between the TSN time and 5G time of a TSN time domain.
- the time comparison information between the TSN time and the 5G time of the TSN time domain and the identification information of the TSN time domain are transmitted to the session management device.
- a user plane device with a transmitter. (Section 5) A receiver that receives TSC support information and TSN stream identification information to which the TSC support information should be applied from the session management device, and An access movement management device including a transmission unit that transmits a message including the TSC support information and identification information of the TSN stream to which the TSC support information is applied to a base station device.
- the transmission unit transmits to the base station apparatus a message including a list having TSC support information and identification information of the TSN stream to which the TSC support information should be applied for each of one or more TSN streams.
- the access movement management device according to paragraph 1.
- Each of the first to sixth paragraphs provides a technique that enables the TSC support information to be applied only to a specific TSN stream.
- the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
- the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
- the processing order may be changed as long as there is no contradiction.
- the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, etc. have been described using functional block diagrams, but such devices are hardware and software. It may be realized in or in combination thereof.
- the software operated by the processor included in each device according to the embodiment of the present invention includes random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, and CD.
- RAM random access memory
- ROM read-only memory
- EPROM EPROM
- EEPROM electrically erasable programmable read-only memory
- register hard disk
- HDD hard disk
- removable disk and CD.
- CD compact discs
- information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
- RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
- system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- the specific operation performed by the base station device 30, the access movement management device 20, the session management device 40, the user plane device 50, etc. may be performed by other nodes in some cases.
- the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
- the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
- the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a true / false value (Boolean: true or false), or by comparing numerical values (for example). , Comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- a channel and a symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier CC: Component Carrier
- CC Component Carrier
- system and “network” used in this disclosure are used interchangeably.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
- the radio resource may be one indicated by an index.
- base station Base Station
- wireless base station base station
- base station device fixed station
- NodeB nodeB
- eNodeB eNodeB
- GNB nodeB
- access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”
- Terms such as “cell group,” “carrier,” and “component carrier” can be used interchangeably.
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
- Communication services can also be provided by Remote Radio Head).
- the term "cell” or “sector” is a part or all of the coverage area of at least one of the base station and the base station subsystem that provides the communication service in this coverage. Point to.
- MS Mobile Station
- UE User Equipment
- Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- determining and “determining” used in this disclosure may include a wide variety of actions.
- “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
- judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
- Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
- judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
- connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
- the connections or connections between the elements may be physical, logical, or a combination thereof.
- connection may be read as "access”.
- the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
- the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
- RS Reference Signal
- Pilot Pilot
- references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
- each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
- the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
- the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
- SCS subcarrier spacing
- TTI Transmission Time Interval
- At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI time interval
- TTI transmission time interval
- TTI transmission time interval
- TTI slot or one minislot
- You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user plane device 50 to allocate radio resources (frequency bandwidth that can be used in each user plane device 50, transmission power, etc.) in TTI units. ..
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, or the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
- PRB Physical resource block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair an RB pair, and the like. May be called.
- the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
- the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
- Access movement management device 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 30 Session management device 310 Transmission unit 320 Reception unit 330 Setting unit 340 Control unit 40 Session management device 410 Transmission unit 420 Reception unit 430 Setting unit 440 Control unit 50 User plane device 510 Transmission unit 520 Reception unit 530 Setting unit 540 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device
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Abstract
Description
前記TSN時間ドメインに属する1以上のTSNストリーム毎に、前記時間比較情報に基づき決定されたTSC支援情報とTSNストリームの識別情報とを基地局装置に向けて送信する送信部と
を備えるセッション管理装置が提供される。
図1は、本発明の実施の形態における通信システム(通信ネットワークと呼んでもよい)を説明するための図である。図1に示されるように、当該通信システムは、UE10(ユーザ装置10あるいは端末10と呼んでもよい)、複数のネットワークノードから構成される。以下、機能ごとに1つのネットワークノードが対応するものとするが、複数の機能を1つのネットワークノードが実現してもよいし、複数のネットワークノードが1つの機能を実現してもよい。また、以下に記載する「接続」は、論理的な接続であってもよいし、物理的な接続であってもよい。
本実施の形態に係る通信システム(5Gシステム)は、図2(非特許文献1のFigure5.27.1-1)に示すように、TSN時間同期をサポートしている。TSN時間同期をサポートする5Gシステムは、IEEE802.1ASの"time aware system"に相当する。当該5Gシステムでは、そのエッジ部分のTSNトランスレータ(TT)のみがIEEE802.1ASの動作をサポートし、UE、gNB、UPF、NW-TT(Network-side TSN translator)、DS-TT(Device-side TSN translator)は5G GM(5G内部システムクロック)に同期する。
例えばQoSフローの確立時等に、TSCトラフィック特性を記載したTSCAI(TSC Assistance Information)がSMF40からAMF20を経由してRAN30に提供される。本実施の形態におけるRAN30であるgNBは、TSCAIにより、TSNトラフィックパターンを把握して、効率的なスケジューリングを行うことができる。
本実施例における1つのQoSフローには、1以上のTSN時間ドメインに属する1以上のTSNストリームが含まれる。例えば、1つのQoSフローに、TSN時間ドメインAに属するTSNストリームA-1とTSNストリームA-2、及び、TSN時間ドメインBに属するTSNストリームB-1とTSNストリームB-2が含まれ得る。
次に、上記のフローに対応する仕様書(規格書)の変更例を説明する。本実施例の通信システムは、例えば、この変更後の仕様書に従って動作する。
次に、これまでに説明した処理及び動作を実行する、RAN30に相当する基地局装置30、AMF20に相当するアクセス移動管理装置20、SMF40に相当するセッション管理装置40、及びUPF50に相当するユーザプレーン装置50の機能構成例を説明する。なお、TSN AF60、PCF70についても、図41~図45に示す構成と同様の構成を有している。
図41は、基地局装置30の機能構成の一例を示す図である。図41に示されるように、基地局装置30は、送信部310と、受信部320と、設定部330と、制御部340とを有する。図41に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図42は、アクセス移動管理装置20の機能構成の一例を示す図である。図42に示されるように、アクセス移動管理装置20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図42に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図43は、セッション管理装置40の機能構成の一例を示す図である。図43に示されるように、セッション管理装置40は、送信部410と、受信部420と、設定部430と、制御部440とを有する。図43に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図44は、ユーザプレーン装置50の機能構成の一例を示す図である。図44に示されるように、ユーザプレーン装置50は、送信部510と、受信部520と、設定部530と、制御部540とを有する。図44に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図41~図44)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
本実施の形態により、少なくとも、下記の第1項~第6項に示すセッション管理装置、ユーザプレーン装置、アクセス移動管理装置が提供される。
(第1項)
あるTSN時間ドメインのTSN時間と5G時間との間の時間比較情報と、当該TSN時間ドメインの識別情報とをユーザプレーン装置から受信する受信部と、
前記TSN時間ドメインに属する1以上のTSNストリーム毎に、前記時間比較情報に基づき決定されたTSC支援情報とTSNストリームの識別情報とを基地局装置に向けて送信する送信部と
を備えるセッション管理装置。
(第2項)
前記時間比較情報は、前記TSN時間ドメインのTSN時間と5G時間との間の時間オフセット、前記TSN時間ドメインのTSN時間と5G時間との間の進み方の差、又は、当該時間オフセットと当該進み方の差の両方である
第1項に記載のセッション管理装置。
(第3項)
前記ユーザプレーン装置において、前記TSN時間ドメインのTSN時間と5G時間との間のドリフト又は進み方の差の変化が検出された場合に、前記受信部は、前記時間比較情報と前記TSN時間ドメインの識別情報とを受信する
第1項又は第2項に記載のセッション管理装置。
(第4項)
あるTSN時間ドメインのTSN時間と5G時間との間のドリフト又は進み方の差の変化を検出する制御部と、
前記ドリフト又は前記進み方の差の変化が検出された場合に、前記TSN時間ドメインのTSN時間と5G時間との間の時間比較情報と、当該TSN時間ドメインの識別情報とをセッション管理装置に送信する送信部と
を備えるユーザプレーン装置。
(第5項)
TSC支援情報と、当該TSC支援情報が適用されるべきTSNストリームの識別情報とをセッション管理装置から受信する受信部と、
前記TSC支援情報と、当該TSC支援情報が適用されるべき前記TSNストリームの識別情報とを含むメッセージを基地局装置に送信する送信部と
を備えるアクセス移動管理装置。
(第6項)
前記送信部は、1以上のTSNストリームのそれぞれに対して、TSC支援情報と、当該TSC支援情報が適用されるべきTSNストリームの識別情報とを有するリストを含むメッセージを前記基地局装置に送信する
第1項に記載のアクセス移動管理装置。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局装置30、アクセス移動管理装置20、セッション管理装置40、ユーザプレーン装置50等は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って各装置が有するプロセッサにより動作するソフトウェアは、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
210 送信部
220 受信部
230 設定部
240 制御部
30 セッション管理装置
310 送信部
320 受信部
330 設定部
340 制御部
40 セッション管理装置
410 送信部
420 受信部
430 設定部
440 制御部
50 ユーザプレーン装置
510 送信部
520 受信部
530 設定部
540 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
Claims (6)
- あるTSN時間ドメインのTSN時間と5G時間との間の時間比較情報と、当該TSN時間ドメインの識別情報とをユーザプレーン装置から受信する受信部と、
前記TSN時間ドメインに属する1以上のTSNストリーム毎に、前記時間比較情報に基づき決定されたTSC支援情報とTSNストリームの識別情報とを基地局装置に向けて送信する送信部と
を備えるセッション管理装置。 - 前記時間比較情報は、前記TSN時間ドメインのTSN時間と5G時間との間の時間オフセット、前記TSN時間ドメインのTSN時間と5G時間との間の進み方の差、又は、当該時間オフセットと当該進み方の差の両方である
請求項1に記載のセッション管理装置。 - 前記ユーザプレーン装置において、前記TSN時間ドメインのTSN時間と5G時間との間のドリフト又は進み方の差の変化が検出された場合に、前記受信部は、前記時間比較情報と前記TSN時間ドメインの識別情報とを受信する
請求項1又は2に記載のセッション管理装置。 - あるTSN時間ドメインのTSN時間と5G時間との間のドリフト又は進み方の差の変化を検出する制御部と、
前記ドリフト又は前記進み方の差の変化が検出された場合に、前記TSN時間ドメインのTSN時間と5G時間との間の時間比較情報と、当該TSN時間ドメインの識別情報とをセッション管理装置に送信する送信部と
を備えるユーザプレーン装置。 - TSC支援情報と、当該TSC支援情報が適用されるべきTSNストリームの識別情報とをセッション管理装置から受信する受信部と、
前記TSC支援情報と、当該TSC支援情報が適用されるべき前記TSNストリームの識別情報とを含むメッセージを基地局装置に送信する送信部と
を備えるアクセス移動管理装置。 - 前記送信部は、1以上のTSNストリームのそれぞれに対して、TSC支援情報と、当該TSC支援情報が適用されるべきTSNストリームの識別情報とを有するリストを含むメッセージを前記基地局装置に送信する
請求項5に記載のアクセス移動管理装置。
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