WO2020200947A1 - Synchronisation temporelle comprenant la préservation d'une estampille temporelle d'origine - Google Patents

Synchronisation temporelle comprenant la préservation d'une estampille temporelle d'origine Download PDF

Info

Publication number
WO2020200947A1
WO2020200947A1 PCT/EP2020/058287 EP2020058287W WO2020200947A1 WO 2020200947 A1 WO2020200947 A1 WO 2020200947A1 EP 2020058287 W EP2020058287 W EP 2020058287W WO 2020200947 A1 WO2020200947 A1 WO 2020200947A1
Authority
WO
WIPO (PCT)
Prior art keywords
time
time stamp
origin
sync message
time information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2020/058287
Other languages
English (en)
Inventor
Kari Juhani NIEMELÄ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2020200947A1 publication Critical patent/WO2020200947A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H04J3/0664—Clock or time synchronisation among packet nodes using timestamps unidirectional timestamps
    • 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
    • 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

Definitions

  • Time sensitive communications may be used to support a variety of applications including applications such as ultra-reliable low-latency communications (UR-LLC), industrial verticals, and/or the like.
  • U-LLC ultra-reliable low-latency communications
  • industrial verticals including networks
  • the IEEE provides a suite of Time Sensitive Network (TSN) specifications to allow synchronization of bridges to grand master clocks (see, e.g., IEEE-1588 and IEEE 802.
  • IAS link layer bridge discovery
  • IEEE 802.1AB link layer bridge discovery
  • provisioning of streams including gate scheduling along the path between TSN endpoints (IEEE 802.1Qcc and IEEE 802.1Qbv), frame replication for reliability (IEEE 802.1CB), and other protocols to enable isochronous transmission to connect endpoints across Ethernet bridges.
  • a method including receiving a sync message for a time domain including at least an origin time stamp and a correction; and sending, based on the received sync message, a time information over a radio link to enable recovery of the origin time stamp and the correction, the radio link synchronized with a system clock, the time information including the received origin time stamp, a reference system frame number, and an offset within a system frame indicated by the reference frame number.
  • the origin time stamp may include a generalized precision time protocol origin time stamp generated by a grand master.
  • the time information may be carried by a radio resource control message and/or a system information broadcast message.
  • the sync message may include a rate ratio, and wherein the recovery of the origin time stamp includes recovering the rate ratio.
  • the recovery of the rate ratio may be based on consecutive messages carrying time information.
  • generation of the time information may be performed by at least determining a time of the system clock related to the origin time stamp, wherein the system clock is from at least the cellular system.
  • the reference system frame number and the offset reference may indicate a time of the system clock related to the origin time stamp.
  • the sync message may be in accordance with IEEE 802.11AS.
  • a gNB base station may perform the receiving, the generating, and the sending.
  • a user equipment may perform the receiving, the generating, and the sending.
  • the user equipment may include circuitry to enable coupling to a time-sensitive network.
  • the sending may further include setting a SyncLocked variable to FALSE, when the sending at a master port do not comply with an expected periodicity of a slave port receiving the time information.
  • FIG. 1 depicts examples of a portion of a 5G system configured to support time sensitive communications between end stations, in accordance with some example embodiments
  • FIG. 2 depicts an example of a messaging flow for transferring generalized precision time protocol origin time stamps over a 5G system, in accordance with some example embodiments
  • FIG. 3 depicts an example of a process for transferring generalized precision time protocol origin time stamps over a 5G system, in accordance with some example embodiments
  • FIG. 4 depicts an example of a network node, in accordance with some exemplary embodiments.
  • FIG. 5 depicts an example of an apparatus, in accordance with some exemplary embodiments.
  • 3GPP TS 22.104 there is a requirement for the 5G system to support the generalized precision time protocol (gPTP) as defined in, for example, IEEE802.1AS.
  • gPTP generalized precision time protocol
  • a grand master provides an origin timestamp for each sync message which may be sent periodically. This origin time stamp is preserved in the gPTP sync messages, when conveyed along all of the gPTP hops through the network until a clock target is reached.
  • the gPTP origin time stamp may be transferred over the 5G system, such as the 5G RAN, through a radio link (which is synchronized with a 5G network, such as a system clock, called as a local clock of gPTP entity) towards a downstream entity, such as a user equipment (UE) or other type device needing the gPTP origin time stamp.
  • a radio link which is synchronized with a 5G network, such as a system clock, called as a local clock of gPTP entity
  • UE user equipment
  • the radio link carries the gPTP origin time stamp as well as information about a system frame number (SFN) and/or a time offset indicating a point in time of a local clock (e.g., a local system clock from the 5G system time domain) related to the gPTP origin timestamp obtained from received sync message. From this information, a receiver, such as the UE, may recover the synchronized time in the gPTP domain.
  • SFN system frame number
  • a time offset indicating a point in time of a local clock e.g., a local system clock from the 5G system time domain
  • a gPTP correction field and/or a gPTP rate ratio field may be determined and then inserted (along with the recovered gPTP origin time stamp) into another gPTP sync message and then forwarded over the time sensitive network to another device.
  • FIG. 1 provide an example of a time sensitive network (TSN) over which the gPTP origin time stamp preservation may be used.
  • TSN time sensitive network
  • FIG. 1 depicts an example of a portion of a network 100, in accordance with some example embodiments.
  • the end stations 102A-D include radio circuitry to transmit (e.g., in the case of a“talker”) and/or receive (e.g., in the case of a“listener”) using for example, TSN circuitry that enables communications over a local area time sensitive network as well.
  • the end station may include, or be coupled to, a user equipment (UE) to enable transmission and/or reception to a 5G network.
  • UE user equipment
  • FIG. 1 depicts an example configuration of a 5G- TSC network, other configurations and topologies may be used as well.
  • FIG. 1 also depicts 5G base stations 110A-B, such as a gNB, and other 5G nodes (e.g., a user plane function (UPF) 1 16A-B).
  • the network 100 includes aspects of the 5G network and a TSC network.
  • the 5G-TSC network 100 includes gNB base stations 110A-B to provide coverage areas, which in this example cover a factory floor, although the network 100 may cover other types of areas to provide the TSC service.
  • the end stations 102A-C are each associated with a robot, and the end station 102D is associated with a robot controller, although the end stations may be associated with other types of devices and carry other types of time sensitive traffic as well.
  • the end stations 102A-B may transmit to end station 102D via a 5G radio access network to a base station, such as gNB 110A, while end station 102C may transmit via a wired connection to a user plane function 116B which is co-located with the gNB 110B to enable user plane traffic access associated with end station 102C.
  • the UPF may perform one or more of the following operations: packet routing and forwarding; packet inspection and QoS handling; connecting to the Internet point of presence; provide a mobility anchor for intra-radio access technology and inter radio-access technology handovers; user plane functionality for lawful intercept; and maintenance and reporting of traffic statistics.
  • the end station 102D (which is associated with the robot controller in this example) may transmit to end stations 102A-B via a 5G radio access network provided by the gNB 110A, or may transmit to end station 102C via the 5G radio access network provided by the gNB 1 10A or gNB 110B (which is co-located with UPF 102C).
  • the communication path between the end stations may be configured by the 5G network with QoS to provide gated scheduling (e.g., specific transmit times and a periodicity for the transmissions) at any nodes on the TSC communication path.
  • the 5G system may need to support gPTP and the preservation of the gPTP origin time stamp.
  • the gPTP origin time stamp may be present at end- station coupled robot 102C but need to be shared with the end-station coupled robot 102B (which as noted includes a UE for 5G RAN access).
  • the UPF 116B sends the gPTP origin time stamp to the gNB 110B
  • the gNB 110B transfers the gPTP origin timestamps through the downlink towards the UE-coupled robot 102B.
  • the gNB 110B transmits the gPTP origin time stamp along with information about the system frame number (SFN) and/or a time offset indicating a point of system time related to the received gPTP origin timestamp.
  • SFN system frame number
  • a time offset indicating a point of system time related to the received gPTP origin timestamp.
  • the gPTP origin time stamp, the recovered gPTP correction field, and the recovered gPTP rate ratio field may be inserted into another gPTP sync message and forwarded over the time sensitive network to another clock slave, such as for example robot controller 102D.
  • the gPTP origin time stamp received at a slave port of time-aware system is copied to sync messages sent via a master port.
  • the SyncLocked variable is set FALSE. This option may allow timing and periodicity if transfer over Uu interface is independent of incoming sync messages, otherwise each incoming sync message needs to trigger a message over Uu. For example, if a gNB is transmitting the SIB messages (as described further below with respect to FIG. 2 at 212A-C), the SyncLocked variable may be set to FALSE. However, if RRC messages are used to carry the O, refSFN, and/or ref offset at at 212A-C, the periodicity may be maintained so the SyncLocked variable may be set to TRUE.
  • FIG. 2 depicts an example flow of messages in which gPTP time is obtained from TSN sync messages 210A-D and carried over a 5G RAN using system information broadcast (SIB) messages 212A-C, in accordance with some example embodiments.
  • SIB system information broadcast
  • FIG. 2 depicts the SIB messages 212A-C, other types of 5G cellular messages, such as RRC messages may be used over the 5G RAN.
  • FIG. 2 depicts a time-aware system 205 including a master port (labeled“M”).
  • the time-aware system 205 may represent a 5G base station, such as gNB 110B.
  • FIG. 2 also depicts UE, such as UE 102B and another time-aware system 208.
  • the time-aware system 205 sends via it’s master port (M) gPTP sync messages 210A-D in accordance with IEEE 802. IAS towards a slave port at the gNB 110B.
  • These sync messages 210A-D each include the grand master origin time stamp (labeled“O”), a gPTP correction field (labeled Ci-i), and a gPTP rate ratio field (labeled Ri-i) in accordance with IEEE 802. IAS.
  • the gNB HOB may determine a local time in the 5G system time base when synchronized time in the gPTP time domain scale has been equal to the time indicated in the gPTP origin timestamp sent by grand master.
  • the time information that conveys the gPTP origin time stamp over Uu interface and synchronized time at the gNB transmitter port towards the RAN and UE includes: (1) a reference system frame number (refSFN) which may be about, for example, 10 bits, (2) a reference time offset (ref offset) within reference the SFN of 10 ms with, for example, 10 nanosecond resolution (e.g., with 20 bits), and (3) the gPTP origin timestamp that is copied from the last received gPTP SYNC message (e.g., with 80 bits).
  • Messages 212A-C depict SIB messages sent by the gNB 110B to the UE 102B.
  • Each of the messages 212A-C include the gPTP origin time stamp (O) as well as the reference SFN (refSFN) and/or the time offset (ref_offset).
  • UE 102B When for example message 212A is received by UE 102B, UE 102B extracts the gPTP origin time stamp as well as the reference SFN (refSFN) and/or the time offset (ref offset). Next, the UE 102B recovers the gPTP correction field (labeled Ci-1) and a gPTP rate ratio field (labeled Ri-1) based on the extracted gPTP origin time stamp, the reference SFN (refSFN), and/or the time offset (ref offset) with propagation and residence time delays.
  • gPTP correction field labeled Ci-1
  • Ri-1 gPTP rate ratio field
  • the UE may determine the frequency offset between the 5G time base and the grand master by tracking a frequency offset from consecutive time information messages and can thus populate Rate ratio (Ri) field sent towards N60 time sensitive networking translator interface (see, e.g., 3 GPP TS 24.534).
  • the UE may populate the sync message correction field (Ci) based on the difference between sync transmission time at master port related to the gPTP origin timestamp in the scale of synchronized time. The same applies also for two step sync mode with populating correction and rate ratio fields in sync follow-up message.
  • the UE 102B may insert the recovered gPTP origin time stamp, the recovered gPTP correction field, and the recovered gPTP rate ratio field may be inserted into another gPTP sync message, such as sync message 216A.
  • This message 216A may be forwarded to another time-aware system 208 over a TSN network.
  • the reference system frame number (refSFN) and the reference time offset (ref offset) within the reference SFN determine the time in local system clock scale when synchronized time of gPTP domain has been equal to the time indicated by the origin time stamp.
  • FIG. 2 depicts a downlink example from the gNB to the UE
  • the process may also be from the UE to the gNB as well using the same or similar process.
  • the UE 102B may receive at a slave port the sync messages from an upstream system and send, e.g., RRC messages, like 212A-C, to the gNB 110B, which may then recover the origin time stamp, correction, and rate ratio and forward them to another system in a sync message.
  • RRC messages like 212A-C
  • FIG. 3 depicts an example of a process 300 for preserving the gPTP origin stamp over the 5G RAN, in accordance with some example embodiments.
  • a gPTP sync message may be received with the gPTP origin time stamp, in accordance with some example embodiments.
  • gNB 110B may receive sync message 210A including the gPTP origin time stamp, and this message 210A may be received from a master (M) upstream port at upstream system 205.
  • M master
  • the gNB may determine synchronized time related to the 5G time base, in accordance with some example embodiments. For example, the gNB may determine the reference system frame number and a reference offset within that reference system frame number that are equal to the time indicated in gPTP origin time stamp (O) sent by the grand master clock.
  • O origin time stamp
  • the gPTP origin time stamp including its determined relations in the 5G time domain, such as the determined reference system frame number and the determined reference offset, are inserted into a 5G message such as a SIB message (or RRC messages) as shown at 212A.
  • SIB or RRC messages 212A-B are sent over the Uu interface over the RAN.
  • the UE 102B may extract the gPTP origin time stamp, the reference SFN (refSFN) and the time offset (ref_offset).
  • the UE 102B recovers the gPTP correction field (labeled Ci-1), and a gPTP rate ratio field (labeled Ri-1) based on the extracted gPTP origin time stamp, the reference SFN (refSFN), and the time offset (ref offset).
  • Ci t s - O, where t s is the time of sending in the grand master scale and O is the origin timestamp.
  • the UE 102B may insert the gPTP information and the recovered gPTP correction field (labeled Ci), and a gPTP rate ratio (Ri) into a sync message as sown at 216A and transmit that sync message to a downstream slave port (S) at system 208.
  • Ci recovered gPTP correction field
  • Si gPTP rate ratio
  • FIG. 4 depicts a block diagram of a network node 400, in accordance with some example embodiments.
  • the network node 400 may be configured as a gNB base station, UPF, and/or the like.
  • the network node 400 may include a network interface 402, a processor 420, and a memory 404, in accordance with some example embodiments.
  • the network interface 402 may couple to backhaul links to other nodes. These backhaul links may be wired and/or wireless.
  • the gNB it includes 5G radio access technology transceivers to provide a 5G radio access network.
  • the memory 404 may comprise volatile and/or non-volatile memory including program code, which when executed by at least one processor 420 provides, among other things, the processes disclosed herein with respect to the base station.
  • FIG. 5 illustrates a block diagram of an apparatus 10, in accordance with some example embodiments.
  • the apparatus 10 (or portions thereof) may be configured to provide an end station including cellular radio access technology.
  • the user equipment may comprise or may be comprised in an end station.
  • the end station including user equipment may be configured to transmit and receive (listener and talker), configured to only receive (e.g., listener), and/or configured to only transmit (talker).
  • the apparatus 10 may include at least one antenna 12 in communication with a transmitter 14 and a receiver 16. Alternatively transmit and receive antennas may be separate.
  • the apparatus 10 may also include a processor 20 configured to provide signals to and receive signals from the transmitter and receiver, respectively, and to control the functioning of the apparatus.
  • Processor 20 may be configured to control the functioning of the transmitter and receiver by effecting control signaling via electrical leads to the transmitter and receiver.
  • processor 20 may be configured to control other elements of apparatus 10 by effecting control signaling via electrical leads connecting processor 20 to the other elements, such as a display or a memory.
  • the processor 20 may, for example, be embodied in a variety of ways including circuitry, at least one processing core, one or more microprocessors with accompanying digital signal processor(s), one or more processor(s) without an accompanying digital signal processor, one or more coprocessors, one or more multi-core processors, one or more controllers, processing circuitry, one or more computers, various other processing elements including integrated circuits (for example, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), and/or the like), or some combination thereof. Accordingly, although illustrated in FIG. 5 as a single processor, in some example embodiments the processor 20 may comprise a plurality of processors or processing cores.
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Signals sent and received by the processor 20 may include signaling information in accordance with an air interface standard of an applicable cellular system, and/or any number of different wireline or wireless networking techniques, comprising but not limited to Wi-Fi, wireless local access network (WLAN) techniques, such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, 802.16, and/or the like.
  • these signals may include speech data, user generated data, user requested data, and/or the like.
  • the apparatus 10 may be capable of operating with one or more air interface standards, communication protocols, modulation types, access types, and/or the like.
  • the apparatus 10 and/or a cellular modem therein may be capable of operating in accordance with various first generation (1G) communication protocols, second generation (2G or 2.5G) communication protocols, third-generation (3G) communication protocols, fourth- generation (4G) communication protocols, fifth generation (5G), Internet Protocol Multimedia Subsystem (IMS) communication protocols (for example, session initiation protocol (SIP) and/or the like.
  • 1G first generation
  • 2G or 2.5G third-generation
  • 4G fourth- generation
  • 5G fifth generation
  • IMS Internet Protocol Multimedia Subsystem
  • the apparatus 10 may be capable of operating in accordance with 2G wireless communication protocols IS-136, Time Division Multiple Access TDMA, Global System for Mobile communications, GSM, IS-95, Code Division Multiple Access, CDMA, and/or the like.
  • the apparatus 10 may be capable of operating in accordance with 2.5G wireless communication protocols General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), and/or the like.
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data GSM Environment
  • the apparatus 10 may be capable of operating in accordance with 3G wireless communication protocols, such as Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access 2000 (CDMA2000), Wideband Code Division Multiple Access (WCDMA), Time Division- Synchronous Code Division Multiple Access (TD-SCDMA), and/or the like.
  • UMTS Universal Mobile Telecommunications System
  • CDMA2000 Code Division Multiple Access 2000
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division- Synchronous Code Division Multiple Access
  • the apparatus 10 may be additionally capable of operating in accordance with 3.9G wireless communication protocols, such as Long Term Evolution (LTE), Evolved Universal Terrestrial Radio Access Network (E-UTRAN), and/or the like. Additionally, for example, the apparatus 10 may be capable of operating in accordance with 4G wireless communication protocols, such as LTE. For example, the apparatus 10 may be capable of operating in accordance with 5G wireless communication protocols, such as 3GPP NR, NG-RAN, and/or the like. Advanced, 5G, and/or the like as well as similar wireless communication protocols that may be subsequently developed.
  • LTE Long Term Evolution
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • 4G wireless communication protocols such as LTE
  • 4G wireless communication protocols such as LTE
  • the apparatus 10 may be capable of operating in accordance with 5G wireless communication protocols, such as 3GPP NR, NG-RAN, and/or the like. Advanced, 5G, and/or the like as well as similar wireless communication protocols that may be subsequently developed
  • the processor 20 may include circuitry for implementing audio/video and logic functions of apparatus 10.
  • the processor 20 may comprise a digital signal processor device, a microprocessor device, an analog-to-digital converter, a digital- to-analog converter, and/or the like. Control and signal processing functions of the apparatus 10 may be allocated between these devices according to their respective capabilities.
  • the processor 20 may additionally comprise an internal voice coder (VC) 20a, an internal data modem (DM) 20b, and/or the like.
  • the processor 20 may include functionality to operate one or more software programs, which may be stored in memory. In general, processor 20 and stored software instructions may be configured to cause apparatus 10 to perform actions.
  • processor 20 may be capable of operating a connectivity program, such as a web browser.
  • the connectivity program may allow the apparatus 10 to transmit and receive web content, such as location-based content, according to a protocol, such as wireless application protocol, WAP, hypertext transfer protocol, HTTP, and/or the like.
  • Apparatus 112 may also comprise a user interface including, for example, an earphone or speaker 24, a ringer 22, a microphone 26, a display 28, a user input interface, and/or the like, which may be operationally coupled to the processor 20.
  • the display 28 may, as noted above, include a touch sensitive display, where a user may touch and/or gesture to make selections, enter values, and/or the like.
  • the processor 20 may also include user interface circuitry configured to control at least some functions of one or more elements of the user interface, such as the speaker 24, the ringer 22, the microphone 26, the display 28, and/or the like.
  • the processor 20 and/or user interface circuitry comprising the processor 20 may be configured to control one or more functions of one or more elements of the user interface through computer program instructions, for example, software and/or firmware, stored on a memory accessible to the processor 20, for example, volatile memory 40, non-volatile memory 42, and/or the like.
  • the apparatus 10 may include a battery for powering various circuits related to the mobile terminal, for example, a circuit to provide mechanical vibration as a detectable output.
  • the user input interface may comprise devices allowing the apparatus 20 to receive data, such as a keypad 30 (which can be a virtual keyboard presented on display 28 or an externally coupled keyboard) and/or other input devices.
  • apparatus 10 may also include one or more mechanisms for sharing and/or obtaining data.
  • the apparatus 10 may include a short-range radio frequency (RF) transceiver and/or interrogator 64, so data may be shared with and/or obtained from electronic devices in accordance with RF techniques.
  • RF radio frequency
  • the apparatus 10 may include other short-range transceivers, such as an infrared (IR) transceiver 66, a BluetoothTM (BT) transceiver 68 operating using BluetoothTM wireless technology, a wireless universal serial bus (USB) transceiver 70, a BluetoothTM Low Energy transceiver, a ZigBee transceiver, an ANT transceiver, a cellular device-to-device transceiver, a wireless local area link transceiver, and/or any other short-range radio technology.
  • Apparatus 1 12 and, in particular, the short-range transceiver may be capable of transmitting data to and/or receiving data from electronic devices within the proximity of the apparatus, such as within 10 meters, for example.
  • the apparatus 10 including the Wi-Fi or wireless local area networking modem may also be capable of transmitting and/or receiving data from electronic devices according to various wireless networking techniques, including 6LoWpan, Wi-Fi, Wi-Fi low power, WLAN techniques such as IEEE 802.11 techniques, IEEE 802.15 techniques, IEEE 802.16 techniques, and/or the like.
  • various wireless networking techniques including 6LoWpan, Wi-Fi, Wi-Fi low power, WLAN techniques such as IEEE 802.11 techniques, IEEE 802.15 techniques, IEEE 802.16 techniques, and/or the like.
  • the apparatus 10 may comprise memory, such as a subscriber identity module (SIM) 38, a removable user identity module (R-UIM), an eUICC, an UICC, and/or the like, which may store information elements related to a mobile subscriber.
  • SIM subscriber identity module
  • R-UIM removable user identity module
  • eUICC embedded user identity module
  • UICC universal integrated circuit card
  • the apparatus 10 may include volatile memory 40 and/or non-volatile memory 42.
  • volatile memory 40 may include Random Access Memory (RAM) including dynamic and/or static RAM, on-chip or off- chip cache memory, and/or the like.
  • RAM Random Access Memory
  • Non-volatile memory 42 which may be embedded and/or removable, may include, for example, read-only memory, flash memory, magnetic storage devices, for example, hard disks, floppy disk drives, magnetic tape, optical disc drives and/or media, non-volatile random access memory (NVRAM), and/or the like. Like volatile memory 40, non-volatile memory 42 may include a cache area for temporary storage of data. At least part of the volatile and/or non-volatile memory may be embedded in processor 20. The memories may store one or more software programs, instructions, pieces of information, data, and/or the like which may be used by the apparatus for performing operations disclosed herein with respect to the end stations/user equipment.
  • NVRAM non-volatile random access memory
  • the memories may comprise an identifier, such as an international mobile equipment identification (IMEI) code, capable of uniquely identifying apparatus 10.
  • the memories may comprise an identifier, such as an international mobile equipment identification (IMEI) code, capable of uniquely identifying apparatus 10.
  • the processor 20 may be configured using computer code stored at memory 40 and/or 42 to perform one or more of the operations disclosed herein with respect to the UE or other nodes or devices.
  • Some of the embodiments disclosed herein may be implemented in software, hardware, application logic, or a combination of software, hardware, and application logic.
  • the software, application logic, and/or hardware may reside on memory 40, the control apparatus 20, or electronic components, for example.
  • a“computer-readable medium” may be any non- transitory media that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer or data processor circuitry, with examples depicted at FIG. 4, computer-readable medium may comprise a non-transitory computer-readable storage medium that may be any media that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • the base stations and user equipment (or one or more components therein) and/or the processes described herein can be implemented using one or more of the following: a processor executing program code, an application-specific integrated circuit (ASIC), a digital signal processor (DSP), an embedded processor, a field programmable gate array (FPGA), and/or combinations thereof.
  • ASIC application-specific integrated circuit
  • DSP digital signal processor
  • FPGA field programmable gate array
  • These various implementations may include implementation in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.
  • These computer programs also known as programs, software, software applications, applications, components, program code, or code
  • computer-readable medium refers to any computer program product, machine-readable medium, computer-readable storage medium, apparatus and/or device (for example, magnetic discs, optical disks, memory, Programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions.
  • PLDs Programmable Logic Devices
  • systems are also described herein that may include a processor and a memory coupled to the processor.
  • the memory may include one or more programs that cause the processor to perform one or more of the operations described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Dans certains modes de réalisation donnés à titre d'exemple, l'invention concerne un procédé qui consiste à recevoir un message de synchronisation pour un domaine temporel comprenant au moins une estampille temporelle d'origine et une correction ; et à envoyer, sur la base du message de synchronisation reçu, des informations temporelles sur une liaison radio pour permettre la récupération de l'estampille temporelle d'origine et la correction, la liaison radio étant synchronisée avec une horloge système, les informations temporelles comprenant l'estampille temporelle d'origine reçue, un numéro de trame système de référence et un décalage à l'intérieur d'une trame système indiquée par le numéro de trame de référence. Des systèmes, des procédés et des produits manufacturés associés sont également décrits.
PCT/EP2020/058287 2019-04-01 2020-03-25 Synchronisation temporelle comprenant la préservation d'une estampille temporelle d'origine Ceased WO2020200947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962827747P 2019-04-01 2019-04-01
US62/827,747 2019-04-01

Publications (1)

Publication Number Publication Date
WO2020200947A1 true WO2020200947A1 (fr) 2020-10-08

Family

ID=70008528

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/058287 Ceased WO2020200947A1 (fr) 2019-04-01 2020-03-25 Synchronisation temporelle comprenant la préservation d'une estampille temporelle d'origine

Country Status (1)

Country Link
WO (1) WO2020200947A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023040889A1 (fr) * 2021-09-17 2023-03-23 中兴通讯股份有限公司 Procédé de synchronisation d'interface radio, terminal et système
EP4160948A1 (fr) * 2021-09-30 2023-04-05 Siemens Aktiengesellschaft Détermination d'une obliquité entre une horloge mère et une horloge locale
CN117459172A (zh) * 2023-11-06 2024-01-26 湛江中冶环保运营管理有限公司 用于工业数据采集与远程操控的高精时间同步方法及系统
EP4451582A1 (fr) * 2023-04-20 2024-10-23 Schneider Electric Industries Sas Temps absolu dans un système industriel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110216660A1 (en) * 2010-03-02 2011-09-08 Jung Gun Lee Synchronization in a wireless node
WO2018197119A1 (fr) * 2017-04-25 2018-11-01 Smart Mobile Labs AG Dispositifs, procédés et programmes informatiques de détermination et de transfert d'une base de temps dans un système de communication mobile, système d'échantillonnage synchronisé dans le temps

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110216660A1 (en) * 2010-03-02 2011-09-08 Jung Gun Lee Synchronization in a wireless node
WO2018197119A1 (fr) * 2017-04-25 2018-11-01 Smart Mobile Labs AG Dispositifs, procédés et programmes informatiques de détermination et de transfert d'une base de temps dans un système de communication mobile, système d'échantillonnage synchronisé dans le temps

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on enhancement of 5G System (5GS) for vertical and Local Area Network (LAN) services (Release 16)", 3GPP STANDARD; TECHNICAL REPORT; 3GPP TR 23.734, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, no. V16.1.0, 25 March 2019 (2019-03-25), pages 1 - 111, XP051722871 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023040889A1 (fr) * 2021-09-17 2023-03-23 中兴通讯股份有限公司 Procédé de synchronisation d'interface radio, terminal et système
EP4160948A1 (fr) * 2021-09-30 2023-04-05 Siemens Aktiengesellschaft Détermination d'une obliquité entre une horloge mère et une horloge locale
EP4451582A1 (fr) * 2023-04-20 2024-10-23 Schneider Electric Industries Sas Temps absolu dans un système industriel
CN117459172A (zh) * 2023-11-06 2024-01-26 湛江中冶环保运营管理有限公司 用于工业数据采集与远程操控的高精时间同步方法及系统
CN117459172B (zh) * 2023-11-06 2024-05-28 湛江中冶环保运营管理有限公司 用于工业数据采集与远程操控的高精时间同步方法及系统

Similar Documents

Publication Publication Date Title
US11695491B2 (en) 5G system support for conveying TSN time synchronization
US12490139B2 (en) Method to support 5G time sensitive communications
US12047265B2 (en) Selective packet duplication or alternative packet transmission based on survival time
CN108668366B (zh) 信号传输方法、网络设备和终端
CN110324889B (zh) 时钟同步方法、通信装置及通信设备
CN102007716B (zh) 用于交互无线电接入技术通信的减少的系统时间附加参数长度表示的方法和系统
US12096253B2 (en) Support for time sensitive communications with high reliability provided via network slicing and path diversity
US9025509B2 (en) Mobile wireless communication system, access gateway, wireless base station, and mobile wireless communication control method
WO2020200947A1 (fr) Synchronisation temporelle comprenant la préservation d'une estampille temporelle d'origine
CN108988972B (zh) 一种时钟同步方法及设备
WO2020087445A1 (fr) Gestion d'adresse ipv6 dans un système iab
US20210400605A1 (en) Timing synchronization of 5g v2x sidelink transmissions
KR20170081690A (ko) 이중 연결성 핸드오버를 위한 방법, 장치 및 시스템
WO2018038653A1 (fr) Identification de nœuds de réseau potentiellement voisins dans un réseau de communication sans fil
WO2010050302A1 (fr) Système de communication mobile, station de commande, station de base, procédé de communication et programme
WO2020225639A1 (fr) Signalisation de motif de blocage dans une mesure internœuds iab
WO2020171802A1 (fr) Synchronisation pour des communications sensibles au temps (tsc) 5gs à l'aide d'un apprentissage automatique
JP6319821B2 (ja) デバイスツーデバイスｄ２ｄ通信の方法及び装置
WO2022028716A1 (fr) Synchronisation temporelle basée sur un équipement utilisateur dans 5gs avec horloge gm sur le côté équipement utilisateur
EP3513586A1 (fr) Gestion de comptage de pdcp dans une reprise de connexion rrc
CN107431960A (zh) 用于具有为每个基站实体提供本地定时参考的本地时钟功能体的移动通信网络的无线电网络同步的方法、移动通信网络、基站实体、程序、以及计算机程序产品
WO2022147766A1 (fr) Procédé de communication, dispositif, et support de stockage
EP4229932A1 (fr) Procédés et noeuds pour permettre des transmissions simultanées dans un noeud iab (integrated access backhaul)
WO2023017296A1 (fr) Procédé et appareil pour système de communication impliquant la synchronisation d'horloges locales
WO2025123303A1 (fr) Transmission de flux tsc par l'intermédiaire d'un tn activé par tsn

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20714562

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20714562

Country of ref document: EP

Kind code of ref document: A1