WO2022073218A1 - Gestion d'octrois configurés et actifs après mises à jour de trajet de liaison de connexion - Google Patents

Gestion d'octrois configurés et actifs après mises à jour de trajet de liaison de connexion Download PDF

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Publication number
WO2022073218A1
WO2022073218A1 PCT/CN2020/120117 CN2020120117W WO2022073218A1 WO 2022073218 A1 WO2022073218 A1 WO 2022073218A1 CN 2020120117 W CN2020120117 W CN 2020120117W WO 2022073218 A1 WO2022073218 A1 WO 2022073218A1
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Prior art keywords
uplink transmission
offset
threshold
user equipment
modification
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PCT/CN2020/120117
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English (en)
Inventor
Rafhael MEDEIROS DE AMORIM
Istvan Kovacs
Ping Yuan
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Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2020/120117 priority Critical patent/WO2022073218A1/fr
Priority to CN202111177411.4A priority patent/CN114340026A/zh
Publication of WO2022073218A1 publication Critical patent/WO2022073218A1/fr

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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
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18504—Aircraft used as relay or high altitude atmospheric platform
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18519—Operations control, administration or maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Some example embodiments may generally relate to mobile or wireless telecommunication systems, such as Long Term Evolution (LTE) or fifth generation (5G) radio access technology or new radio (NR) access technology, or other communications systems.
  • LTE Long Term Evolution
  • 5G fifth generation
  • NR new radio
  • certain embodiments may relate to systems and/or methods for handling configured and active grants after feeder link path updates.
  • Examples of mobile or wireless telecommunication systems may include the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) , Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN) , LTE-Advanced (LTE-A) , MulteFire, LTE-A Pro, and/or fifth generation (5G) radio access technology or new radio (NR) access technology.
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Long Term Evolution
  • E-UTRAN Long Term Evolution
  • LTE-A LTE-Advanced
  • MulteFire LTE-A Pro
  • 5G wireless systems refer to the next generation (NG) of radio systems and network architecture.
  • 5G is mostly built on a new radio (NR) , but a 5G (or NG) network can also build on E-UTRA radio.
  • NR may provide bitrates on the order of 10-20 Gbit/s or higher, and may support at least enhanced mobile broadband (eMBB) and ultra-reliable low-latency-communication (URLLC) as well as massive machine type communication (mMTC) .
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency-communication
  • mMTC massive machine type communication
  • NR is expected to deliver extreme broadband and ultra-robust, low latency connectivity and massive networking to support the Internet of Things (IoT) .
  • IoT Internet of Things
  • M2M machine-to-machine
  • the nodes that can provide radio access functionality to a user equipment may be named gNB when built on NR radio and may be named NG-eNB when built on E-UTRA radio.
  • a method may include receiving, from a network node, one or more parameters associated with a timing advance modification.
  • the one or more parameters may comprise at least: a threshold, and an offset.
  • the method may include determining whether to apply the offset to an uplink transmission to delay the uplink transmission.
  • the method may include applying the offset to the uplink transmission to delay an uplink transmission time of the uplink transmission based on determining to apply the offset.
  • the method may include checking if the timing advance modification includes an increase in a gap between a downlink reference time and the uplink transmission time for the uplink transmission. In a variant, the method may include checking if there are one or more active scheduling grants, timers, or procedures affected by the timing advance modification based on the threshold. In a variant, the one or more active scheduling grants, timers, or procedures may be associated with the uplink transmission.
  • checking based on the threshold may further comprise comparing a modified uplink transmission time with the threshold.
  • the modified uplink transmission time may be based on the uplink transmission time and the timing advance modification.
  • the checking based on the threshold may further comprise determining that there are the one or more active scheduling grants, timers, or procedures affected by the timing advance modification based on the uplink transmission time being within the threshold.
  • the method may include re-aligning an uplink transmission timing of the user equipment.
  • re-aligning the uplink transmission time may comprise adjusting a start time of a first symbol of the uplink transmission time based on the offset, and performing one or more operations for the uplink transmission.
  • determining whether to apply the offset may further comprise determining to not apply the offset to the uplink transmission.
  • the threshold may be a cell-specific threshold or a user equipment-specific threshold.
  • the offset may comprise one or more transmission slots.
  • the offset may be equal to zero.
  • determining whether to apply the offset may further comprise determining to not apply the offset, and the method may further comprise determining to skip the uplink transmission, and performing one or more operations for a subsequent uplink transmission.
  • a method may include transmitting one or more parameters associated with a timing advance modification.
  • the one or more parameters may comprise at least a threshold and an offset.
  • the method may include detecting that a scheduled transmission time unit for one or more user equipment is not reachable in time by the one or more user equipment after the timing advance modification is applied.
  • the method may include determining that the one or more user equipment has delayed an uplink transmission according to the one or more parameters.
  • the threshold may be a cell-specific threshold or a user equipment-specific threshold.
  • the offset may include one or more transmission slots.
  • the threshold may be configured to cause all of the one or more user equipment to apply the offset, or the threshold may be configured to cause a subset of the one or more user equipment to apply the offset.
  • the threshold may be configured to avoid collision between the one or more user equipment and may be based on a probability of the one or more user equipment being affected.
  • the offset may be configured such that affected user equipment do not impact one or more other user equipment allocations.
  • the method may further include determining to not mark the uplink transmission as a failed uplink transmission, and determining to wait until a subsequent uplink transmission opportunity for the UL transmission or another UL transmission.
  • a third embodiment may be directed to an apparatus including at least one processor and at least one memory comprising computer program code.
  • the at least one memory and computer program code may be configured, with the at least one processor, to cause the apparatus at least to perform the method according to the first embodiment or the second embodiment, or any of the variants discussed above.
  • a fourth embodiment may be directed to an apparatus that may include circuitry configured to perform the method according to the first embodiment or the second embodiment, or any of the variants discussed above.
  • a fifth embodiment may be directed to an apparatus that may include means for performing the method according to the first embodiment or the second embodiment, or any of the variants discussed above.
  • Examples of the means may include one or more processors, memory, and/or computer program codes for causing the performance of the operation.
  • a sixth embodiment may be directed to a computer readable medium comprising program instructions stored thereon for performing at least the method according to the first embodiment or the second embodiment, or any of the variants discussed above.
  • a seventh embodiment may be directed to a computer program product encoding instructions for performing at least the method according to the first embodiment or the second embodiment, or any of the variants discussed above.
  • Fig. 1 illustrates an example flow diagram of a method for handling configured and active grants after feeder link path updates, according to some embodiments
  • Fig. 2 illustrates an example flow diagram of a method, according to some embodiments
  • Fig. 3 illustrates an example flow diagram of a method, according to some embodiments
  • Fig. 4a illustrates an example block diagram of an apparatus, according to an embodiment
  • Fig. 4b illustrates an example block diagram of an apparatus, according to another embodiment.
  • the phrase “set of” refers to a set that includes one or more of the referenced set members.
  • the phrases “set of, ” “one or more of, ” and “at least one of, ” or equivalent phrases, may be used interchangeably.
  • “or” is intended to mean “and/or, ” unless explicitly stated otherwise.
  • NTN Non-Terrestrial Networks
  • LEO low Earth orbit
  • GEO geostationary orbit
  • HAPS high altitude platforms
  • 3GPP NR may provide for several NTN satellite scenarios. However, certain problems may be caused by the transparent architecture deployment.
  • a UE may be connected to a gNB that is located on the ground, using 5G NR radio access technology, through a satellite link (e.g., a satellite/HAPS) .
  • a satellite link e.g., a satellite/HAPS
  • the gNB medium access control (MAC) functionalities may be on the ground and the satellite may act as a repeater node (relay) .
  • the link between the UE and satellite may include a service link, whereas the link between the satellite and gNB may include a feeder link.
  • the NTN transparent setup may differ from prior 5G NR solutions for terrestrial networks.
  • the NTN transparent setup may differ with respect to latency.
  • the latency experienced in a LEO NTN transparent network can range up to dozens of milliseconds (ms) , which may be one order of magnitude higher than the latency that previous 5G systems were designed for, even in the most conservative approaches.
  • the latency differences may also impact the reporting and adaptation mechanisms on the physical (PHY) /MAC layers, as information may become obsolete when the receiver is finally able to receive the information.
  • the transmission latencies experienced by the UE (downlink (DL) ) and gNB (uplink (UL) ) may be changing versus time due to satellite movement.
  • timing advance (TA) adjustments and synchronization may become more challenging compared to terrestrial networks.
  • NTN transparent setup may differ with respect to relative velocity.
  • a LEO satellite may have a relative velocity to Earth of approximately 7,500 meters per second (m/s) , which may be much higher than any of the traditional relative speeds observed between the UE and the gNB in terrestrial networks. This may impact the system in terms of Doppler, but also in terms of there having to be a more complex management of mobility events.
  • NTN transparent networks there may be issues related to maintenance of correct UL TAs in cases where the high mobility of NTN relay nodes (either a LEO satellite or a HAPS) triggers mobility procedures that changes the feeder link.
  • NTN relay nodes either a LEO satellite or a HAPS
  • a gNB may communicate with a UE using NR NTN access, by using relays in a first satellite and a second satellite traveling along an orbit.
  • the total physical layer latency may depend on the time for the information to travel the path from the gNB to the NTN gateway to the first satellite to the second satellite to the UE.
  • the second satellite may move into the coverage area of the NTN gateway, and the first satellite may be moving out of the coverage area of the NTN satellite.
  • the feeder link path may be updated and the inter-satellite link relay from the first satellite to the second satellite may be removed from the feeder path.
  • the total elapsed time in the physical layer may then depend on the time the information needs to travel from the gNB to the second satellite to the UE, and this may be a shorter time than for the path from the gNB to the first satellite to the second satellite to the UE.
  • This modification in the feeder link path may indicate that the UE will need to be re-synchronized to the frame transmitted by the gNB.
  • the TA used by a UE in UL transmission may experience a modification, as there may be a change in the total feeder link path, even if the service link path remains constant (or near constant) .
  • One way of performing the re-synchronization may be to perform a new random access setup, but there may be some disadvantages with this solution. For instance, the UE may need to drop HARQ processes, flush buffers, and drop UL configured grants and UL active grants, which may increase the interruption time (especially considering the processing/latency time that may be spent in the setup processes) .
  • the UE may need to re-do the synchronization processes, and this may cause an increase in the PHY load due to the newly triggered access procedures. Moreover, if many UEs have to perform the random access procedure at the same time, this may increase the probability of contention on the random access procedure or may increase the time to accommodate UEs in contention-free resources. Furthermore, considering the satellites’ high speed (e.g., approximately 7,500 m/s) , the UEs may be likely to face several mobility events (e.g., feeder link path switches, handovers, satellite switches, etc. ) during a relatively short time interval, such as a satellite passing above the coverage area. Therefore, minimizing the data interruption time in each of these events may improve communications of a NTN transparent network.
  • mobility events e.g., feeder link path switches, handovers, satellite switches, etc.
  • the modification in the TA described above may have consequences for the UE configured grants. If the modification is backwards in time (e.g., the total latency on physical layer is increased after the feeder link path switch) , then the UE may have to increase the gap between the DL reference time and its UL timing. In other words, the UE may have to move backward the reference timing for the beginning of the UL frame.
  • the new time for the procedure may be moved to a point in the past for the UE. As an action in the past cannot take place, the procedure cannot be performed.
  • the UE Before the modification, the UE may perform a UL transmission in the beginning of system frame #1 (SF#1) , but the network may inform the UE that there had been a modification in TA that needs to be applied before the SF#1.
  • the new TA which may be larger than the original TA, the offset between DL and UL may increase, and the beginning of the SF#1 in the UL direction may now be before the current time from the UE perspective.
  • Some embodiments described herein may provide for handling configured and active grants after feeder link path updates. For example, certain embodiments described herein may enable the UE to use the configured grants or to transmit the HARQ feedback that were missed by the TA modification. This may help improve communications in a NTN transparent network in certain situations.
  • certain embodiments described herein may provide for certain operations from the UE, after a TA modification is experienced and/or detected.
  • the gNB may broadcast one or more parameters for the operations (e.g., on radio resource control (RRC) , NTN- specific system information block (SIB) , or in a TA modification-related message) .
  • the parameters may include a threshold (e.g., a configured grant time threshold) that indicates which users should adjust their configured grants based on the time of the next configured grant.
  • the parameters may include an offset (e.g., a next configured grant postponing offset) that indicates how much time offset is to be added to a missed transmission opportunity (e.g., at the next configured grant) .
  • an offset e.g., a next configured grant postponing offset
  • UE-specific levels For larger cells (e.g., with an approximately 50-100 kilometer (km) radius) , the usage of UE-specific settings may be useful to differentiate operations among users.
  • the embodiments described herein are not limited to larger cells and may be applied to a cell with a radius less than 50 km or greater than 100 km.
  • a UE may receive a message indicating a TA modification procedure or the UE may detect the TA modification.
  • the UE may check if the TA modification is a backward modification. If this check results in an affirmative result, then the UE may check if its configured grants, configured timers, and/or procedures are affected within the threshold. If this check results in an affirmative result, then the UE may apply the offset to the affected configured grants, timers, procedures, or other timing relationships.
  • a network node may detect the UE operations based on detecting that a scheduled slot (or another transmission time unit, such as a symbol or a subframe) for the UE is not reachable in time by the UE after the TA modification is applied.
  • the UE may not transmit for a configured grant and may transmit at the next configured grant, without disrupting the transmission at the next configured grant.
  • Certain UEs may postpone their transmissions by the offset described above, and just the UEs whose grants would be missed may postpone their transmissions.
  • Fig. 1 illustrates an example flow diagram of a method 100 for handling configured and active grants after feeder link path updates, according to some embodiments.
  • Fig. 1 illustrates operations of a UE and a network node (e.g., a gNB) .
  • the network node may determine that a change on a feeder link path is needed.
  • the network node may determine that a satellite may have to be removed from the feeder link path and may have to switch to another feeder link path or an inter-satellite link path.
  • the network node may signal, to a UE, a TA modification (e.g., a new initial TA value with larger values or smaller values than a previous TA value) for the UE.
  • a TA modification e.g., a new initial TA value with larger values or smaller values than a previous TA value
  • the network node may trigger certain operations in the UE with respect to the feeder link path change by signaling the TA modification to the UE.
  • the network node may signal the amount of time for the TA modification and at what point in time the TA modification applies.
  • the network node in connection with the operations illustrated at 104, the network node may signal one or more parameters associated with the TA modification (e.g., an offset and a threshold described elsewhere herein) .
  • the UE may check if the TA modification includes an increase in a gap between a DL reference time and a UL transmission time for a UL transmission. For example, the UE may check if the TA modification is a modification backwards in time. If the check returns a negative result (106-NO) , then the UE may, at 108, exit the operations illustrated with respect to the method 100 (e.g., may not proceed to performing the operations illustrated at 110) .
  • 106-NO negative result
  • the UE may, at 110, check if there is an active scheduling grant (e.g., a configured grant or another type of grant) , timer, or procedure (e.g., a HARQ feedback procedure) affected by the TA modification based on the threshold, where the configured grant, timer, and/or procedure may be associated with a UL transmission. For example, the UE may compare the timing for the UL transmission plus the TA modification to the threshold. If the time for the UL transmission plus the TA modification is in a slot within the threshold, then the UE may determine that UL transmission is affected by the TA modification.
  • an active scheduling grant e.g., a configured grant or another type of grant
  • timer e.g., a HARQ feedback procedure
  • the threshold may be configured by the network node to be as aggressive or conservative as desired with respect to causing a UE to detect an affected UL transmission, as described elsewhere herein.
  • the threshold may be a cell-specific threshold (e.g., applied the same to different UEs within a cell) , or may be UE-specific (e.g., different for different UEs, even within the same cell) . If a timer associated with a configured grant or procedure is set to a value of 0, the value of the threshold may be considered to be large enough for any UEs that have reached the operations at 110 without exiting the operations to determine that a configured grant or a procedure is affected.
  • the UE may, at 108, exit the operations of the method 100 (e.g., may not proceed to the operations illustrated at 112) . If the check returns an affirmative result (110-YES) , then the UE may, at 112, postpone a UL transmission by the offset described above. For example, the UE may postpone the UL transmission by K slots, where K slots may be indicated by the offset. Although certain embodiments are described in the context of slots, the embodiments also may apply to subframes, symbols, or another type of transmission time unit.
  • the offset may have different definitions for the UE and network node. If the offset is set to a value of 0, the UE may determine to not postpone the UL transmission opportunity, may determine to skip that UL transmission opportunity, and may perform one or more operations for a subsequent uplink transmission opportunity.
  • the network node may detect that a scheduled slot for the UE is not reachable in time by the UE after the TA modification is applied. The network node may then determine that the UE has delayed the UL transmission according to the parameters signaled to the UE. After determining that the UL transmission is delayed, the network node may determine to not mark the UL transmission as a failed UL transmission and may determine to wait until a subsequent UL transmission opportunity for the UL transmission or another UL transmission.
  • Fig. 1 is provided as an example. Other examples are possible, according to some embodiments.
  • the network node may help to ensure that postponement of a transmission from a UE or a group of UEs does not cause collision with other allocations to other UEs in a cell.
  • the network node may configure the offset such that the impacted UEs do not impact another UE allocation.
  • the network node may configure the threshold to avoid collision between UEs, considering the differences between a small value threshold and a large value threshold. For example, a small value threshold may be conservative and may just cause UEs with a high probability of being affected to be postponed.
  • a large value threshold may be less conservative and may be used to postpone some UEs that would experience a collision with some of the other postponed UEs.
  • the network node may create a UE-specific parameter to cause some shift in frequency on the allocation after postpone as well.
  • the network node may signal the parameters to the UE in various ways.
  • the parameters may be included in a SIB broadcast message (e.g., it may be part of a SIB configuration, or added as part of a NTN-specific SIB) .
  • the parameters may be included in a SIB dedicated to large propagation delay settings (e.g., NTN SIB to introduce a cell common delay parameter) . If the signalling related to the TA modification in the cell is broadcast to UEs at the same time, it may contain fields that include the parameters.
  • the network node may signal the parameters by means of an RRC reconfiguration message.
  • the parameters may be included in the ServingCellConfigCommon information element (IE) . If the signalling for the TA modification the cell is broadcast to UEs at the same time, the signalling may include fields that include the parameters.
  • the parameters may be included in format indexes of a MAC control element (CE) using one or more of the reserved formats, such as the reserved indexes 33-46 in Table 1 below:
  • the MAC CE used for the TA may be used to signal the parameters to the UE.
  • the UE and network node may determine that the UE should interpret certain MAC CE (s) as conveying one or more parameters, instead of conveying the TA Command.
  • the parameters may be signalled at a cell-level, but may be reconfigurable at the UE level for better flexibility.
  • one or more of the parameters may be updated for the UE in order to differentiate from the cell-level configuration. This can be done, for example, when one or more UEs have to have different modification settings to avoid resource collision, or when a quality of service (QoS) parameter has to have a faster response than others.
  • QoS quality of service
  • Fig. 2 illustrates an example flow diagram of a method 200, according to some embodiments.
  • Fig. 2 shows example operations of a network node (e.g., apparatus 10 illustrated in, and described with respect to, Fig. 4a) .
  • Some of the operations illustrated in Fig. 2 may be similar to some operations shown in, and described with respect to, Fig. 1.
  • the method may include, at 202, transmitting one or more parameters associated with a timing advance modification, for example, in a manner similar to that described at 104 of Fig. 1.
  • the one or more parameters may comprise at least a threshold and an offset.
  • the method may include, at 204, detecting that a scheduled transmission time unit (e.g., slot) for one or more user equipment is not reachable in time by the one or more user equipment after the timing advance modification is applied, for example, in a manner similar to that described at 114 of Fig. 1.
  • the method may include, at 206, determining that the one or more user equipment has delayed an uplink transmission according to the one or more parameters.
  • the threshold may be a cell-specific threshold or a user equipment-specific threshold.
  • the offset may include one or more transmission slots.
  • the threshold may be configured to cause all of the one or more user equipment to apply the offset, or the threshold may be configured to cause a subset of the one or more user equipment to apply the offset.
  • the threshold may be configured to avoid collision between the one or more user equipment and may be based on a probability of the one or more user equipment being affected.
  • the offset may be configured such that affected user equipment do not impact one or more other user equipment allocations.
  • the method may further include determining to not mark the uplink transmission as a failed uplink transmission, and determining to wait until a subsequent uplink transmission opportunity for the UL transmission or another UL transmission.
  • Fig. 2 is provided as an example. Other examples are possible according to some embodiments.
  • Fig. 3 illustrates an example flow diagram of a method 300, according to some embodiments.
  • Fig. 3 shows example operations of a UE (e.g., apparatus 20 illustrated in, and described with respect to, Fig. 4b) .
  • Some of the operations illustrated in Fig. 3 may be similar to some operations shown in, and described with respect to, Fig. 1.
  • the method may include, at 302, receiving, from a network node, one or more parameters associated with a timing advance modification, for example, in a manner similar to that described at 104 of Fig. 1.
  • the one or more parameters may include at least a threshold, and an offset.
  • the method may include, at 304, determining whether to apply the offset to an uplink transmission to delay the uplink transmission.
  • the method may include, at 306, applying the offset to the uplink transmission to delay an uplink transmission time of the uplink transmission based on determining to apply the offset.
  • the method illustrated in Fig. 3 may include one or more additional aspects described below or elsewhere herein.
  • the method may include checking if the timing advance modification includes an increase in a gap between a downlink reference time and the uplink transmission time for the uplink transmission, for example, in a manner similar to that described at 106 of Fig. 1.
  • the method may include checking if there are one or more active scheduling grants, timers, or procedures affected by the timing advance modification based on the threshold, for example, in a manner similar to that described at 110 of Fig. 1.
  • the one or more active scheduling grants, timers, or procedures may be associated with the uplink transmission.
  • the checking based on the threshold may further include comparing a modified uplink transmission time with the threshold, and determining that there are the one or more active scheduling grants, timers, or procedures affected by the timing advance modification based on the uplink transmission time being within the threshold.
  • the modified uplink transmission time may be based on the uplink transmission time and the timing advance modification.
  • the method may include re-aligning an uplink transmission timing of the user equipment.
  • the re-aligning the uplink transmission time may include adjusting a start time of a first symbol of the uplink transmission time based on the offset, and performing one or more operations for the uplink transmission.
  • the determining at 304 may include determining to not apply the offset to the uplink transmission.
  • the threshold may be a cell-specific threshold or a user equipment-specific threshold.
  • the offset may include one or more transmission slots. When the offset is equal to zero, the determining at 304 may include determining to not apply the offset, and the method may further include determining to skip the uplink transmission, and performing one or more operations for a subsequent uplink transmission.
  • Fig. 3 is provided as an example. Other examples are possible according to some embodiments.
  • apparatus 10 may be a node, host, or server in a communications network or serving such a network.
  • apparatus 10 may be a network node, satellite, base station, a Node B, an evolved Node B (eNB) , 5G Node B or access point, next generation Node B (NG-NB or gNB) , and/or a WLAN access point, associated with a radio access network, such as a LTE network, 5G or NR.
  • apparatus 10 may be an eNB in LTE or gNB in 5G.
  • apparatus 10 may be comprised of an edge cloud server as a distributed computing system where the server and the radio node may be stand-alone apparatuses communicating with each other via a radio path or via a wired connection, or they may be located in a same entity communicating via a wired connection.
  • apparatus 10 represents a gNB
  • it may be configured in a central unit (CU) and distributed unit (DU) architecture that divides the gNB functionality.
  • the CU may be a logical node that includes gNB functions such as transfer of user data, mobility control, radio access network sharing, positioning, and/or session management, etc.
  • the CU may control the operation of DU (s) over a front-haul interface.
  • the DU may be a logical node that includes a subset of the gNB functions, depending on the functional split option. It should be noted that one of ordinary skill in the art would understand that apparatus 10 may include components or features not shown in Fig. 4a.
  • apparatus 10 may include a processor 12 for processing information and executing instructions or operations.
  • processor 12 may be any type of general or specific purpose processor.
  • processor 12 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) , field-programmable gate arrays (FPGAs) , application-specific integrated circuits (ASICs) , and processors based on a multi-core processor architecture, as examples. While a single processor 12 is shown in Fig. 4a, multiple processors may be utilized according to other embodiments.
  • apparatus 10 may include two or more processors that may form a multiprocessor system (e.g., in this case processor 12 may represent a multiprocessor) that may support multiprocessing.
  • processor 12 may represent a multiprocessor
  • the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster) .
  • Processor 12 may perform functions associated with the operation of apparatus 10, which may include, for example, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 10, including processes related to management of communication or communication resources.
  • Apparatus 10 may further include or be coupled to a memory 14 (internal or external) , which may be coupled to processor 12, for storing information and instructions that may be executed by processor 12.
  • Memory 14 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory.
  • memory 14 can be comprised of any combination of random access memory (RAM) , read only memory (ROM) , static storage such as a magnetic or optical disk, hard disk drive (HDD) , or any other type of non-transitory machine or computer readable media.
  • the instructions stored in memory 14 may include program instructions or computer program code that, when executed by processor 12, enable the apparatus 10 to perform tasks as described herein.
  • apparatus 10 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium.
  • an external computer readable storage medium such as an optical disc, USB drive, flash drive, or any other storage medium.
  • the external computer readable storage medium may store a computer program or software for execution by processor 12 and/or apparatus 10.
  • apparatus 10 may also include or be coupled to one or more antennas 15 for transmitting and receiving signals and/or data to and from apparatus 10.
  • Apparatus 10 may further include or be coupled to a transceiver 18 configured to transmit and receive information.
  • the transceiver 18 may include, for example, a plurality of radio interfaces that may be coupled to the antenna (s) 15.
  • the radio interfaces may correspond to a plurality of radio access technologies including one or more of GSM, NB-IoT, LTE, 5G, WLAN, Bluetooth, BT-LE, NFC, radio frequency identifier (RFID) , ultrawideband (UWB) , MulteFire, and the like.
  • the radio interface may include components, such as filters, converters (for example, digital-to-analog converters and the like) , mappers, a Fast Fourier Transform (FFT) module, and the like, to generate symbols for a transmission via one or more downlinks and to receive symbols (for example, via an uplink) .
  • filters for example, digital-to-analog converters and the like
  • mappers for example, mappers
  • FFT Fast Fourier Transform
  • transceiver 18 may be configured to modulate information on to a carrier waveform for transmission by the antenna (s) 15 and demodulate information received via the antenna (s) 15 for further processing by other elements of apparatus 10.
  • transceiver 18 may be capable of transmitting and receiving signals or data directly.
  • apparatus 10 may include an input and/or output device (I/O device) .
  • memory 14 may store software modules that provide functionality when executed by processor 12.
  • the modules may include, for example, an operating system that provides operating system functionality for apparatus 10.
  • the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 10.
  • the components of apparatus 10 may be implemented in hardware, or as any suitable combination of hardware and software.
  • processor 12 and memory 14 may be included in or may form a part of processing circuitry or control circuitry.
  • transceiver 18 may be included in or may form a part of transceiver circuitry.
  • circuitry may refer to hardware-only circuitry implementations (e.g., analog and/or digital circuitry) , combinations of hardware circuits and software, combinations of analog and/or digital hardware circuits with software/firmware, any portions of hardware processor (s) with software (including digital signal processors) that work together to cause an apparatus (e.g., apparatus 10) to perform various functions, and/or hardware circuit (s) and/or processor (s) , or portions thereof, that use software for operation but where the software may not be present when it is not needed for operation.
  • hardware-only circuitry implementations e.g., analog and/or digital circuitry
  • combinations of hardware circuits and software e.g., combinations of hardware circuits and software, combinations of analog and/or digital hardware circuits with software/firmware, any portions of hardware processor (s) with software (including digital signal processors) that work together to cause an apparatus (e.g., apparatus 10) to perform various functions, and/or hardware circuit (s) and/or processor (s) , or portions thereof, that use
  • circuitry may also cover an implementation of merely a hardware circuit or processor (or multiple processors) , or portion of a hardware circuit or processor, and its accompanying software and/or firmware.
  • circuitry may also cover, for example, a baseband integrated circuit in a server, cellular network node or device, or other computing or network device.
  • apparatus 10 may be a network node or RAN node, such as a base station, access point, Node B, eNB, gNB, WLAN access point, or the like.
  • a network node or RAN node such as a base station, access point, Node B, eNB, gNB, WLAN access point, or the like.
  • apparatus 10 may be controlled by memory 14 and processor 12 to perform the functions associated with any of the embodiments described herein, such as some operations illustrated in, or described with respect to, Figs. 1 and 2.
  • apparatus 10 may be controlled by memory 14 and processor 12 to perform the method of Fig. 2.
  • apparatus 20 may be a node or element in a communications network or associated with such a network, such as a UE, mobile equipment (ME) , mobile station, mobile device, stationary device, IoT device, or other device.
  • a UE mobile equipment
  • ME mobile station
  • mobile device mobile device
  • stationary device stationary device
  • IoT device IoT device
  • a UE may alternatively be referred to as, for example, a mobile station, mobile equipment, mobile unit, mobile device, user device, subscriber station, wireless terminal, tablet, smart phone, IoT device, sensor or NB-IoT device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications thereof (e.g., remote surgery) , an industrial device and applications thereof (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain context) , a consumer electronics device, a device operating on commercial and/or industrial wireless networks, or the like.
  • apparatus 20 may be implemented in, for instance, a wireless handheld device, a wireless plug-in accessory, or the like.
  • apparatus 20 may include one or more processors, one or more computer-readable storage medium (for example, memory, storage, or the like) , one or more radio access components (for example, a modem, a transceiver, or the like) , and/or a user interface.
  • apparatus 20 may be configured to operate using one or more radio access technologies, such as GSM, LTE, LTE-A, NR, 5G, WLAN, WiFi, NB-IoT, Bluetooth, NFC, MulteFire, and/or any other radio access technologies. It should be noted that one of ordinary skill in the art would understand that apparatus 20 may include components or features not shown in Fig. 4b.
  • apparatus 20 may include or be coupled to a processor 22 for processing information and executing instructions or operations.
  • processor 22 may be any type of general or specific purpose processor.
  • processor 22 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) , field-programmable gate arrays (FPGAs) , application-specific integrated circuits (ASICs) , and processors based on a multi-core processor architecture, as examples. While a single processor 22 is shown in Fig. 4b, multiple processors may be utilized according to other embodiments.
  • apparatus 20 may include two or more processors that may form a multiprocessor system (e.g., in this case processor 22 may represent a multiprocessor) that may support multiprocessing.
  • processor 22 may represent a multiprocessor
  • the multiprocessor system may be tightly coupled or loosely coupled (e.g., to form a computer cluster) .
  • Processor 22 may perform functions associated with the operation of apparatus 20 including, as some examples, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 20, including processes related to management of communication resources.
  • Apparatus 20 may further include or be coupled to a memory 24 (internal or external) , which may be coupled to processor 22, for storing information and instructions that may be executed by processor 22.
  • Memory 24 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and/or removable memory.
  • memory 24 can be comprised of any combination of random access memory (RAM) , read only memory (ROM) , static storage such as a magnetic or optical disk, hard disk drive (HDD) , or any other type of non-transitory machine or computer readable media.
  • the instructions stored in memory 24 may include program instructions or computer program code that, when executed by processor 22, enable the apparatus 20 to perform tasks as described herein.
  • apparatus 20 may further include or be coupled to (internal or external) a drive or port that is configured to accept and read an external computer readable storage medium, such as an optical disc, USB drive, flash drive, or any other storage medium.
  • an external computer readable storage medium such as an optical disc, USB drive, flash drive, or any other storage medium.
  • the external computer readable storage medium may store a computer program or software for execution by processor 22 and/or apparatus 20.
  • apparatus 20 may also include or be coupled to one or more antennas 25 for receiving a downlink signal and for transmitting via an uplink from apparatus 20.
  • Apparatus 20 may further include a transceiver 28 configured to transmit and receive information.
  • the transceiver 28 may also include a radio interface (e.g., a modem) coupled to the antenna 25.
  • the radio interface may correspond to a plurality of radio access technologies including one or more of GSM, LTE, LTE-A, 5G, NR, WLAN, NB-IoT, Bluetooth, BT-LE, NFC, RFID, UWB, and the like.
  • the radio interface may include other components, such as filters, converters (for example, digital-to-analog converters and the like) , symbol demappers, signal shaping components, an Inverse Fast Fourier Transform (IFFT) module, and the like, to process symbols, such as OFDMA symbols, carried by a downlink or an uplink.
  • filters for example, digital-to-analog converters and the like
  • symbol demappers for example, digital-to-analog converters and the like
  • signal shaping components for example, an Inverse Fast Fourier Transform (IFFT) module, and the like
  • IFFT Inverse Fast Fourier Transform
  • transceiver 28 may be configured to modulate information on to a carrier waveform for transmission by the antenna (s) 25 and demodulate information received via the antenna (s) 25 for further processing by other elements of apparatus 20.
  • transceiver 28 may be capable of transmitting and receiving signals or data directly.
  • apparatus 20 may include an input and/or output device (I/O device) .
  • apparatus 20 may further include a user interface, such as a graphical user interface or touchscreen.
  • memory 24 stores software modules that provide functionality when executed by processor 22.
  • the modules may include, for example, an operating system that provides operating system functionality for apparatus 20.
  • the memory may also store one or more functional modules, such as an application or program, to provide additional functionality for apparatus 20.
  • the components of apparatus 20 may be implemented in hardware, or as any suitable combination of hardware and software.
  • apparatus 20 may optionally be configured to communicate with apparatus 10 via a wireless or wired communications link 70 according to any radio access technology, such as NR.
  • processor 22 and memory 24 may be included in or may form a part of processing circuitry or control circuitry.
  • transceiver 28 may be included in or may form a part of transceiving circuitry.
  • apparatus 20 may be a UE, mobile device, mobile station, ME, IoT device and/or NB-IoT device, for example.
  • apparatus 20 may be controlled by memory 24 and processor 22 to perform the functions associated with any of the embodiments described herein, such as some operations illustrated in, or described with respect to, Figs. 1 and 3.
  • apparatus 20 may be controlled by memory 24 and processor 22 to perform the method of Fig. 3.
  • an apparatus may include means for performing a method or any of the variants discussed herein, e.g., a method described with reference to Figs. 2 and 3.
  • Examples of the means may include one or more processors, memory, and/or computer program code for causing the performance of the operation.
  • certain example embodiments provide several technological improvements, enhancements, and/or advantages over existing technological processes.
  • one benefit of some example embodiments is improved handling of a TA modification in a transparent NTN network.
  • the use of some example embodiments results in improved functioning of communications networks and their nodes and, therefore constitute an improvement at least to the technological field of NTN network communications and/or operations, among others.
  • any of the methods, processes, signaling diagrams, algorithms or flow charts described herein may be implemented by software and/or computer program code or portions of code stored in memory or other computer readable or tangible media, and executed by a processor.
  • an apparatus may be included or be associated with at least one software application, module, unit or entity configured as arithmetic operation (s) , or as a program or portions of it (including an added or updated software routine) , executed by at least one operation processor.
  • Programs also called program products or computer programs, including software routines, applets and macros, may be stored in any apparatus-readable data storage medium and may include program instructions to perform particular tasks.
  • a computer program product may include one or more computer-executable components which, when the program is run, are configured to carry out some example embodiments.
  • the one or more computer-executable components may be at least one software code or portions of code. Modifications and configurations used for implementing functionality of an example embodiment may be performed as routine (s) , which may be implemented as added or updated software routine (s) . In one example, software routine (s) may be downloaded into the apparatus.
  • software or a computer program code or portions of code may be in a source code form, object code form, or in some intermediate form, and it may be stored in some sort of carrier, distribution medium, or computer readable medium, which may be any entity or device capable of carrying the program.
  • carrier may include a record medium, computer memory, read-only memory, photoelectrical and/or electrical carrier signal, telecommunications signal, and/or software distribution package, for example.
  • the computer program may be executed in a single electronic digital computer or it may be distributed amongst a number of computers.
  • the computer readable medium or computer readable storage medium may be a non-transitory medium.
  • the functionality may be performed by hardware or circuitry included in an apparatus (e.g., apparatus 10 or apparatus 20) , for example through the use of an application specific integrated circuit (ASIC) , a programmable gate array (PGA) , a field programmable gate array (FPGA) , or any other combination of hardware and software.
  • ASIC application specific integrated circuit
  • PGA programmable gate array
  • FPGA field programmable gate array
  • the functionality may be implemented as a signal, such as a non-tangible means that can be carried by an electromagnetic signal downloaded from the Internet or other network.
  • an apparatus such as a node, device, or a corresponding component, may be configured as circuitry, a computer or a microprocessor, such as single-chip computer element, or as a chipset, which may include at least a memory for providing storage capacity used for arithmetic operation (s) and/or an operation processor for executing the arithmetic operation (s) .
  • Example embodiments described herein apply equally to both singular and plural implementations, regardless of whether singular or plural language is used in connection with describing certain embodiments. For example, an embodiment that describes operations of a single network node equally applies to embodiments that include multiple instances of the network node, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Systèmes, procédés, appareils et produits-programmes informatiques servant à gérer des octrois configurés et actifs après des mises à jour de trajet de liaison de connexion. Un équipement utilisateur (UE) peut recevoir un message indiquant une procédure de modification d'avance de synchronisation (TA) ou l'UE peut détecter la modification de TA. L'UE peut vérifier si la modification de TA est une modification vers l'arrière. Si cette vérification aboutit à un résultat affirmatif, l'UE peut alors vérifier si ses octrois configurés, temporisateurs configurés et/ou procédures sont affectés dans les limites d'une certaine plage. Si cette vérification aboutit à un résultat affirmatif, l'UE peut alors appliquer un décalage aux octrois configurés, temporisateurs configurés, ou procédures affectés. Un nœud de réseau peut détecter les opérations de l'UE sur la base de la détection du fait qu'un créneau planifié pour l'UE n'est pas atteignable en temps opportun par l'UE après que la modification de TA a été appliquée.
PCT/CN2020/120117 2020-10-10 2020-10-10 Gestion d'octrois configurés et actifs après mises à jour de trajet de liaison de connexion WO2022073218A1 (fr)

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