WO2021032285A1 - Accès de groupe à une entité cible par avance de synchronisation prédite - Google Patents

Accès de groupe à une entité cible par avance de synchronisation prédite Download PDF

Info

Publication number
WO2021032285A1
WO2021032285A1 PCT/EP2019/072213 EP2019072213W WO2021032285A1 WO 2021032285 A1 WO2021032285 A1 WO 2021032285A1 EP 2019072213 W EP2019072213 W EP 2019072213W WO 2021032285 A1 WO2021032285 A1 WO 2021032285A1
Authority
WO
WIPO (PCT)
Prior art keywords
subset
network entity
timing advance
user equipments
advance value
Prior art date
Application number
PCT/EP2019/072213
Other languages
English (en)
Inventor
Ingo Viering
Hans Thomas HÖHNE
István Zsolt KOVÁCS
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
Priority to PCT/EP2019/072213 priority Critical patent/WO2021032285A1/fr
Publication of WO2021032285A1 publication Critical patent/WO2021032285A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface

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 apparatuses, systems, and/or methods for improving group access to a target entity through a predicted timing advance.
  • 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), or unlicensed NR (NR-U) access technology.
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Long Term Evolution
  • E-UTRAN Evolved UTRAN
  • LTE-A LTE- Advanced
  • MulteFire LTE-A Pro
  • NR-U unlicensed NR
  • Fifth generation (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 the 5G (or NG) network can also build on E-UTRAN radio.
  • NR will provide bitrates on the order of 10-20 Gbit/s or higher, and will 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 are named gNB when built on NR radio and named NG-eNB when built on E-UTRAN radio.
  • One embodiment may be directed to a method.
  • the method may include receiving, by a user equipment, a corresponding timing advance value from a source network entity.
  • the method may also include applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • the apparatus may include means for receiving, by a user equipment, a corresponding timing advance value from a source network entity.
  • the apparatus may also include means for applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • Another example embodiment may be directed to an apparatus which may include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus at least to receive a corresponding timing advance value from a source network entity.
  • the apparatus may also be caused to applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • a non-transitory computer readable medium can be encoded with instmctions that may, when executed in hardware, perform a method.
  • the method may include receiving, by a user equipment, a corresponding timing advance value from a source network entity.
  • the method may also include applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • a computer program product may perform a method.
  • the method may include receiving, by a user equipment, a corresponding timing advance value from a source network entity.
  • the method may also include applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • an apparatus may include circuitry configured to receiving a corresponding timing advance value from a source network entity.
  • the apparatus may also include circuitry configured to apply a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • a method may include determining by a source network entity that a plurality of its user equipments must perform a random access channel procedure to a target network entity.
  • the method may also include forming at least one subset of user equipments out of the plurality of user equipments.
  • the method may further include determining a representative user equipment for the subset.
  • the method may also include receiving a timing advance value of the representative user equipment from the target network entity.
  • the method may include deriving a corresponding timing advance value for each of the user equipments in the subset.
  • the method may include sending the corresponding timing advance value to each of the user equipments in the subset to trigger each of the user equipments to apply a simplified access procedure using the corresponding timing advance value.
  • an apparatus may include means for determining by a source network entity that a plurality of its user equipments must perform a random access channel procedure to a target network entity.
  • the apparatus may also include means for forming at least one subset of user equipments out of the plurality of user equipments.
  • the apparatus may further include means for determining a representative user equipment for the subset.
  • the apparatus may also include means for receiving a timing advance value of the representative user equipment from the target network entity.
  • the apparatus may include means for deriving a corresponding timing advance value for each of the user equipments in the subset.
  • an apparatus may include at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus at least to determine that a plurality of user equipments of the apparatus must perform a random access channel procedure to a target network entity.
  • the apparatus may also be caused to form at least one subset of user equipments out of the plurality of user equipments.
  • the apparatus may further be caused to determine a representative user equipment for the subset.
  • the apparatus may also be caused to receive a timing advance value of the representative user equipment from the target network entity.
  • the apparatus may be caused to derive a corresponding timing advance value for each of the user equipments in the subset.
  • the apparatus may be caused to send the corresponding timing advance value to each of the user equipments in the subset to trigger each of the user equipments to apply a simplified access procedure using the corresponding timing advance value.
  • a non-transitory computer readable medium can be encoded with instmctions that may, when executed in hardware, perform a method. The method may include determining by a source network entity that a plurality of its user equipments must perform a random access channel procedure to a target network entity.
  • the method may also include forming at least one subset of user equipments out of the plurality of user equipments.
  • the method may further include determining a representative user equipment for the subset.
  • the method may also include receiving a timing advance value of the representative user equipment from the target network entity.
  • the method may include deriving a corresponding timing advance value for each of the user equipments in the subset.
  • the method may include sending the corresponding timing advance value to each of the user equipments in the subset to trigger each of the user equipments to apply a simplified access procedure using the corresponding timing advance value.
  • a computer program product may perform a method.
  • the method may include determining by a source network entity that a plurality of its user equipments must perform a random access channel procedure to a target network entity.
  • the method may also include forming at least one subset of user equipments out of the plurality of user equipments.
  • the method may further include determining a representative user equipment for the subset.
  • the method may also include receiving a timing advance value of the representative user equipment from the target network entity.
  • the method may include deriving a corresponding timing advance value for each of the user equipments in the subset.
  • an apparatus may include circuitry configured to determine that a plurality of user equipments of the apparatus must perform a random access channel procedure to a target network entity.
  • the apparatus may also include circuitry configured to form at least one subset of user equipments out of the plurality of user equipments.
  • the apparatus may further include circuitry configured to determine a representative user equipment for the subset.
  • the apparatus may also include circuitry configured to receive a timing advance value of the representative user equipment from the target network entity.
  • the apparatus may include circuitry configured to derive a corresponding timing advance value for each of the user equipments in the subset. Further, the apparatus may include circuitry configured to send the corresponding timing advance value to each of the user equipments in the subset to trigger each of the user equipments to apply a simplified access procedure using the corresponding timing advance value.
  • FIG. 1(a) illustrates a first scenario that characterizes the effects of a signaling storm.
  • FIG. 1(b) illustrates a second scenario that characterizes the effects of a signaling storm.
  • FIG. 1(c) illustrates a third scenario that characterizes the effects of a signaling storm.
  • FIG. 1(d) illustrates a fourth scenario that characterizes the effects of a signaling storm.
  • FIG. 2 illustrates a flow diagram of a method, according to an example embodiment.
  • FIG. 3 illustrates a transparent satellite scenario with non-overlapping beams, where groups of user equipments for random access channel-less handover are formed based on target beam constellations, according to an example embodiment.
  • FIG. 4 illustrates a handover due to a degrading access link, according to an example embodiment.
  • FIG. 5 illustrates earth- fixed beam cells with group handover at edge- cells, according to an example embodiment.
  • FIG. 6 illustrates a flow diagram of another method, according to an example embodiment.
  • FIG. 7 illustrates a flow diagram of a further method, according to an example embodiment.
  • FIG. 8(a) illustrates an apparatus, according to an example embodiment.
  • FIG. 8(b) illustrates another apparatus, according to an example embodiment.
  • the current architecture in LTE networks is fully distributed in the radio and fully centralized in the core network.
  • the low latency applications and services in 5G require to bring the content close to the radio which leads to local breakout and multi-access edge computing (MEC).
  • 5G enables analytics and knowledge generation to occur at the source of the data. This approach requires leveraging resources that may not be continuously connected to a network such as laptops, smartphones, tablets and sensors.
  • MEC provides a distributed computing environment for application and service hosting. It also has the ability to store and process content in close proximity to cellular subscribers for faster response time.
  • Edge computing covers a wide range of technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to- peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self- healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and/or latency critical), and critical communications (autonomous vehicles, traffic safety, real-time analytics, time-critical control, healthcare applications).
  • technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to- peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self- healing networks, remote cloud services, augmented and virtual reality, data caching, Internet of Things (massive connectivity and/or latency critical), and critical communications (autonomous vehicles,
  • LTE or 5G/New Radio (NR) mobile technologies may include non terrestrial networks such as moving satellites (e.g., low earth orbit) that may be used to provide service to terrestrial user equipments (UEs).
  • moving satellites e.g., low earth orbit
  • UEs terrestrial user equipments
  • the satellite may have to find a new ground station and/or the UEs may have to find a new satellite.
  • simultaneous random access procedures may be required, which may create a signaling storm.
  • FIGs. 1(a) - 1(d) illustrate different scenarios that characterize the effects of a signaling storm.
  • a transparent satellite where the ground stations host the gNBs functionality, amplifies, forwards, and potentially applies a frequency conversion to the signals received from the UEs or the ground gNB.
  • no further functionality and 3GPP awareness may be assumed for a transparent satellite.
  • FIGs. 1(c) and 1(d) corresponding to scenarios 3 and 4, it may be assumed that the satellite hosts the gNB functionality, and that the ground station may only serve as a gateway. However, in all of scenarios 1-4, the UEs may initially be connected to ground station 1 via satellite 1 , and the link between satellite 1 and the ground base station may break, which ultimately affects all the UEs illustrated in FIGs. 1(a) - 1(d). However, as also illustrated in each of FIGs. 1(a) - 1(d), there are connections that show the remedy of the fading links on which the connections are continued.
  • the transparent satellite may connect to a “better” ground base station which may be a new gNB.
  • a “better” ground base station which may be a new gNB.
  • This may involve a classic handover for each UE.
  • the timing advance (TA) for each UE may change since the SAT-gNB delay may change (i.e., random access channel-less (RACH-less) introduced in LTE Rel-14 procedure may not be applied).
  • RACH-less random access channel-less
  • a RACH storm may exhibit several problems, but may primarily involve interference. However, it may also be possible to run low on dedicated preambles, which may require the use of contention-based RACH with common preambles. This may result in potential collisions, which may increase the RACH delay, further increase the interference, and may lead to RACH failures (and thereby handover failures).
  • DC dual connectivity
  • this scenario may resemble carrier aggregation (CA) (ideal backhaul, where cells are processed in the same gNB), but the timing difference may be rather large, and far outside the CA requirements.
  • CA carrier aggregation
  • setting up a secondary node (SN, which may be in the same gNB) for a UE may involve a RACH procedure, which consequently may lead to a RACH storm.
  • the satellites may include gNB functionality.
  • the UEs may have to handover to a different satellite-gNB if the original loses the backhaul connection.
  • a RACH storm may result.
  • the original Sat may change the ground station, which may be transparent to the UE.
  • the ground stations may be separated by long distances including, for example, several hundreds of kilometers, this type of scenario may be preferable in certain cases.
  • One method for possibly avoiding a RACH storm may be to avoid initiating the handovers (or Sat changes) exactly at the same time.
  • this avoidance may result in several drawbacks. For example, although this may remove the collisions, it may not reduce the overall signaling storm. Instead, the avoidance may merely distribute the signaling storm over time. As such, a method that reduces the involved signaling may be desired.
  • FIG. 2 illustrates a flow diagram of a method, according to an example embodiment.
  • the delays, and thereby the TAs of the new connections may be very similar for UEs that are close to each other. This may be a consequence of the extremely high altitude of the satellites compared with the distance between the UEs.
  • a procedure for simultaneous RACH procedures of multiple UEs may be provided.
  • the method of FIG. 2 may include initially, at 1, the source entity (e.g., source gNB and/or SATgNB) may determine that the plurality of its connected UEs have to perform a procedure(s) involving RACH (e.g., a handover, or the change of a transparent satellite) to another target entity.
  • the target entity may be the target gNB (e.g., target gNB and/or target SATgNB).
  • this could also be the same as the source gNB, but connected through a different satellite gateway in other example embodiments.
  • the determining that UEs have to performing a HO may be based on for instance satellite transition schedules, or on measurements of the UL strength of multiple UEs by the serving gNB.
  • the source entity may group the plurality of UEs into one or more subsets.
  • the UEs in the same subset may have a similar TA as the target entity.
  • the source entity may determine at least one representative UE for every subset, and inform the target entity about the grouping and the representatives.
  • the source entity may inform the target entity via an Xn interface, or via an inter-satellite link.
  • the source entity may initiate the procedure involving a RACH to the target entity for the representative UEs.
  • the RACH procedure may include a handover or change of a satellite for the representative UEs.
  • the representative UEs may perform conventional RACH with the target entity.
  • the target entity may determine the TAs for each of the representative UEs.
  • the target entity may forward an information based on the TAs of the representative UEs to the source entity.
  • the information may include the TA values themselves.
  • the source entity may derive the TA of every remaining UE based on the information of the representative UEs of the subset that it belongs to. According to an example embodiment, this TA may be provided to the UE to be used when connecting to the target entity.
  • the UE may apply a simplified access procedure including, for example, a RACH-less handover, using the provided TA.
  • grouping the UEs may be performed based on one or more factors. For example, in one embodiment, UEs with similar TAs in the source entity may be grouped to one subset. In another example embodiment, UEs with similar geographical coordinates may be grouped to one subset. In a further example embodiment, UEs covered by one radio beam (or multiple radio beams) of the source cell may be grouped to one subset.
  • the source entity may provide the TA values to the remaining UEs.
  • usage of RACH-less handover may be extended.
  • the remaining UEs may predict the TA based on the TA in the old cell (e.g., source entity), and downlink timing differences between the old and new cell.
  • UEs that are covered by one radio beam (or multiple radio beams) of the target cell may be grouped to one subset. This may be possible when the UEs are reporting measurements of the target cell to the same source. For example, FIG.
  • FIG. 3 illustrates a transparent satellite scenario with non-overlapping beams, where groups of UEs for RACH-less handover are formed based on target beam constellations, according to an example embodiment. Additionally, in a further example embodiment, UEs with a similar combination of signal strength/quality measurements may be grouped to one subset.
  • the representative(s) for a subset may be determined by various methods. For example, in one embodiment, the source cell may determine the UE in the geographical center of the subset to be the representative for a subset. In another example embodiment, the source cell may determine that the UE that is closest to the average of the TAs of all UEs in the subset to be the representative for that subset. In a further example embodiment, the source cell may determine that the UE that is closest to the average of the largest and smallest TAs of all the UES in the subset to be the representative for that subset.
  • the source cell may determine that the UE that has the highest urgency to make the handover (e.g., the UE where the difference between target measurement and source measurement is largest, or where the target measurement is largest and/or source measurement is weakest), is the representative for that subset.
  • the scenarios described above may be based on breaking a feeder link, in other example embodiments, scenarios may be based on a situation where the access link to the source entity fails, and the UEs may have to handover to a target entity before the access link to the source entity fails.
  • FIG. 4 illustrates a handover due to a degrading access link, according to an example embodiment.
  • the groups of UEs may handover in a short period of time, and the TA of the first UE in the group may be reused by subsequent UEs.
  • the TA of the first UE may be reported from the target entity to the source entity, and the target entity may forward a predicted TA value to the UEs, which may then apply a simplified access procedure such as, for example, a RACH-less handover.
  • the satellite access link may degrade and a group handover may be necessary between source and target entities on board satellites with beam steering capabilities.
  • FIG. 5 illustrates earth-fixed beam cells with group handover at edge- cells, according to an example embodiment.
  • group handover may exist with active antenna arrays.
  • the antenna arrays may create earth-fixed cell patterns, in which the beam may remain in one location on earth while the satellite traverses over the earth.
  • the satellite may release that cell.
  • a neighboring satellite may already have established an overlapping cell there to facilitate handover.
  • group handover may be performed.
  • the cell at the edge of coverage for gNBl is cell 2, and cell 2 may overlap with cell a from gNB2. Additionally, in an example embodiment, gNB2 may about to go out of coverage of the area of cell a and will not be able to still provide cell a. In such a case, the UEs (UE1- UE5) may have to be handed over from gNB2 to gNBl ’s cell 2. For example, as illustrated in the lower half of the FIG. 5, the satellites have advanced, and now cell b of satellite gNB2 is about to fade or go out of coverage. When this occurs, UE6 may have to be handed over from gNB2 to the newly established cell 3 of gNBl. The method to carry out the steps required in FIG. 5 is illustrated in FIG. 2.
  • FIG. 6 illustrates an example flow diagram of a method, according to an example embodiment.
  • the flow diagram of FIG. 6 may be performed by one or more mobile stations and/or UEs, for instance similar to apparatus 10 illustrated in FIG. 8(a).
  • the method of FIG. 6 may include initially, at 600, determining that a link of the UE to the source network is going to go out of coverage (e.g. based on satellite transition schedules and/or measurements of UL signals of multiple UEs. entity is broken.
  • the method may also include, at 605, receiving, by the UE, a corresponding timing advance value from a source network entity.
  • the method may further include, at 610, applying a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • the UE may be part of a subset of a plurality of UEs.
  • the corresponding timing advance value may be derived from a representative UE of the subset that performs a RACH procedure with the target network entity.
  • the RACH procedure may include a radio handover, a change of a network entity, setting up a secondary cell for carrier aggregation, or setting up a secondary node for multi-connectivity.
  • the simplified access procedure may be a RACH-less handover procedure.
  • the subset of the plurality of UEs may be established based on a similarity of the corresponding timing advance value, geographical coordinates, radio beam coverage of the source network entity, radio beam coverage of the target network entity, or a similarity of a signal strength or quality measurements.
  • the representative UE may be a UE selected based on a geographical location, an average of timing advances of all of the user equipments in the subset, and average of a largest and a smallest timing advances of all the user equipments in the subset, or an urgency for a handover.
  • the corresponding timing advance value may be derived from a plurality of user equipments that have performed the random access channel procedure.
  • FIG. 7 illustrates a flow diagram of another method, according to an example embodiment.
  • the method of FIG. 7 may be performed by a network entity or network node in a 3 GPP system, such as LTE or 5G-NR.
  • the method of FIG. 7 may be performed by a network node, a base station, a SATgNB, eNB, or gNB, for instance similar to apparatus 20 illustrated in FIG. 8(b).
  • the method of FIG. 7 may include initially, at 700, determining by a source network entity that a plurality of its UEs must perform a RACH procedure to a target network entity.
  • the method may also include, at 705, forming at least one subset of UEs out of the plurality of UEs.
  • the method may further include, at 710, initiating the RACH procedure to the target network entity for the representative UE.
  • the method may also include, at 715, determining a representative UE for the subset.
  • the method may include, at 720, receiving a timing advance value of the representative UE from the target network entity.
  • the method may include, at 725, deriving a corresponding timing advance value for each of the UEs in the subset.
  • the method may also include, at 730, sending the corresponding timing advance value to each of the UEs in the subset to trigger each of the UEs to apply a simplified access procedure using the corresponding timing advance value.
  • the corresponding timing advance value may be derived based on a timing advance value of the representative UE.
  • the RACH procedure may include a radio handover, a change of a network entity, setting up a secondary cell for carrier aggregation, or setting up a secondary node for multi-connectivity.
  • the simplified access procedure may be a RACH-less handover procedure.
  • the subset of the plurality of UEs may be formed based on a similarity of the corresponding timing advance value, geographical coordinates, radio beam coverage of the source network entity, radio beam coverage of the target network entity, or a similarity of a signal strength or quality measurements.
  • the representative UE may be determined based on a geographical location, an average of timing advances of all of the user equipments in the subset, and average of a largest and a smallest timing advances of all the user equipments in the subset, or an urgency for a handover.
  • several representative UEs may be selected to perform a RACH procedure that allows to determine their TA. Then the TA values of the several representatives may be used to derive the TAs of other UEs in the group, for instance by taking an average value, or extrapolating geographical locations and TA.
  • the source may perform TA derivation.
  • the target may be made aware of the subset of UEs that is to hand over, and the representative UE or representative UEs, and the target may derive the TA for the other UEs. The target may then provide the derived TAs for the other UEs to the source either separately or as part of RACH-less HO commands.
  • FIG. 8(a) illustrates an apparatus 10 according to an example embodiment.
  • apparatus 10 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.
  • 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, or the like.
  • apparatus 10 may be implemented in, for instance, a wireless handheld device, a wireless plug-in accessory, or the like.
  • apparatus 10 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 10 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 10 may include components or features not shown in FIG. 8(a).
  • apparatus 10 may include or be coupled to 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. 8(a), 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 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 10, including processes illustrated in FIGs. 1-6.
  • 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.
  • 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 to perform any of the methods illustrated in FIGs. 1-6.
  • apparatus 10 may also include or be coupled to one or more antennas 15 for receiving a downlink signal and for transmitting via an uplink from apparatus 10.
  • Apparatus 10 may further include a transceiver 18 configured to transmit and receive information.
  • the transceiver 18 may also include a radio interface (e.g., a modem) coupled to the antenna 15.
  • 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 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 (FO device).
  • apparatus 10 may further include a user interface, such as a graphical user interface or touchscreen.
  • memory 14 stores 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.
  • apparatus 10 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 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 transceiving circuitry.
  • apparatus 10 may be a UE for example.
  • apparatus 10 may be controlled by memory 14 and processor 12 to perform the functions associated with example embodiments described herein.
  • apparatus 10 may be controlled by memory 14 and processor 12 to receive a corresponding timing advance value from a source network entity.
  • Apparatus 10 may also be controlled by memory 14 and processor 12 to apply a simplified access procedure using the corresponding timing advance value to access a target network entity.
  • FIG. 8(b) illustrates an apparatus 20 according to an example embodiment.
  • the apparatus 20 may be a radio resource manager, RAT, node, host, or server in a communication network or serving such a network.
  • apparatus 20 may be a satellite, SATgNB, 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 WFAN access point, associated with a radio access network (RAN), such as an FTE network, 5G or NR.
  • RAN radio access network
  • apparatus 20 may include components or features not shown in FIG. 8(b).
  • apparatus 20 may include 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. 8(b), 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, 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 20, including processes illustrated in FIGS. 1-5 and 7.
  • 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.
  • 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 to perform the methods illustrated in FIGs. 1-5 and 7.
  • apparatus 20 may also include or be coupled to one or more antennas 25 for transmitting and receiving signals and/or data to and from apparatus 20.
  • Apparatus 20 may further include or be coupled to a transceiver 28 configured to transmit and receive information.
  • the transceiver 28 may include, for example, a plurality of radio interfaces that may be coupled to the antenna(s) 25.
  • 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).
  • 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).
  • FFT 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 18 may be capable of transmitting and receiving signals or data directly.
  • apparatus 20 may include an input and/or output device (I/O device).
  • memory 24 may store 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.
  • 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.
  • 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 and 20) 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.
  • an apparatus e.g., apparatus 10 and 20
  • 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.
  • the term 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 20 may be a radio resource manager, RAT, node, host, or server in a communication network or serving such a network.
  • apparatus 20 may be a 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 WLAN access point, associated with a radio access network (RAN), such as an LTE network, 5G or NR.
  • RAN radio access network
  • apparatus 20 may be controlled by memory 24 and processor 22 to perform the functions associated with any of the embodiments described herein.
  • apparatus 20 may be controlled by memory 24 and processor 22 to determine that a plurality of UEs of the apparatus must perform a RACH procedure to a target network entity.
  • Apparatus 20 may also be controlled by memory 24 and processor 22 to form at least one subset of UEs out of the plurality of UEs.
  • Apparatus 20 may further be controlled by memory 24 and processor 22 to determine a representative user equipment for the subset.
  • apparatus 20 may be controlled by memory 24 and processor 22 to receive a timing advance value of the representative user equipment from the target network entity. Further, apparatus 20 may be controlled by memory 24 and processor 22 to derive a corresponding timing advance value for each of the UEs in the subset.
  • Apparatus 20 may also be controlled by memory 24 and processor 22 to send the corresponding timing advance value to each of the UEs in the subset to trigger each of the UEs to apply a simplified access procedure using the corresponding timing advance value. Apparatus 20 may further be controlled by memory 24 and processor 22 to initiate the RACH procedure to the target network entity for the representative UE.
  • Certain example embodiments described herein provide several technical improvements, enhancements, and /or advantages.
  • NTN non terrestrial networks
  • certain example embodiments may make it possible to achieve less power consumption for the target and source entities on-board the satellite (SATgNB case).
  • a computer program product may comprise 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 it. Modifications and configurations required for implementing functionality of an example embodiment may be performed as routine(s), which may be implemented as added or updated software routine(s). Software routine(s) maybe downloaded into the apparatus.
  • software or a computer program code or portions of it 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 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, 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, including at least a memory for providing storage capacity used for arithmetic operation and an operation processor for executing the arithmetic operation.
  • CA Carrier Aggregation [0095] DC Dual Connectivity [0096] eNB Enhanced Node B [0097] gNB 5G or NR Base Station [0098] LTE Long Term Evolution [0099] NR New Radio [0100] RACH Random Access Channel [0101] Sat Satellite [0102] TA Timing Advance [0103] UE User Equipment

Landscapes

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

Abstract

La présente invention concerne des systèmes, des procédés, des appareils des produits-programmes d'ordinateur permettant d'améliorer un accès de groupe à une entité cible par une avance de synchronisation prédite. Un procédé peut comprendre la réception depuis une entité de réseau source, par un équipement d'utilisateur, d'une valeur d'avance de synchronisation correspondante. Le procédé peut également comprendre l'application d'une procédure d'accès simplifiée en utilisant la valeur d'avance de synchronisation correspondante pour accéder à une entité de réseau cible.
PCT/EP2019/072213 2019-08-20 2019-08-20 Accès de groupe à une entité cible par avance de synchronisation prédite WO2021032285A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/072213 WO2021032285A1 (fr) 2019-08-20 2019-08-20 Accès de groupe à une entité cible par avance de synchronisation prédite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/072213 WO2021032285A1 (fr) 2019-08-20 2019-08-20 Accès de groupe à une entité cible par avance de synchronisation prédite

Publications (1)

Publication Number Publication Date
WO2021032285A1 true WO2021032285A1 (fr) 2021-02-25

Family

ID=67742388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/072213 WO2021032285A1 (fr) 2019-08-20 2019-08-20 Accès de groupe à une entité cible par avance de synchronisation prédite

Country Status (1)

Country Link
WO (1) WO2021032285A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023015406A1 (fr) * 2021-08-09 2023-02-16 Oppo广东移动通信有限公司 Procédé et appareil de communication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150271723A1 (en) * 2014-03-20 2015-09-24 Qualcomm Incorporated Uplink timing advance adjustment
US20180084463A1 (en) * 2011-05-23 2018-03-22 Interdigital Patent Holdings, Inc. Apparatus and methods for group wireless transmit/receive unit (wtru) handover
US20180332507A1 (en) * 2016-01-25 2018-11-15 Kyocera Corporation Radio terminal and base station
US20190104452A1 (en) * 2016-04-20 2019-04-04 Electronics And Telecommunications Research Institute Handover method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180084463A1 (en) * 2011-05-23 2018-03-22 Interdigital Patent Holdings, Inc. Apparatus and methods for group wireless transmit/receive unit (wtru) handover
US20150271723A1 (en) * 2014-03-20 2015-09-24 Qualcomm Incorporated Uplink timing advance adjustment
US20180332507A1 (en) * 2016-01-25 2018-11-15 Kyocera Corporation Radio terminal and base station
US20190104452A1 (en) * 2016-04-20 2019-04-04 Electronics And Telecommunications Research Institute Handover method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023015406A1 (fr) * 2021-08-09 2023-02-16 Oppo广东移动通信有限公司 Procédé et appareil de communication

Similar Documents

Publication Publication Date Title
US20210391912A1 (en) Beam diversity for multi-slot communication channel
US20230179374A1 (en) Channel transmission method, terminal device, and network device
US11849358B2 (en) Handover of a coordinated multi-point connection
US20230036639A1 (en) Supporting a narrow serving beam in a hierarchical beam configuration
US11729046B2 (en) Failure indication of master cell group with fallback to radio resource control re-establishment
EP4335187A1 (fr) Enregistrement efficace dans une zone où un service de tranche est partiellement pris en charge
US11503513B2 (en) Handover improvement for air-to-ground system
EP3979680A1 (fr) Services de localisation améliorés en 5g
WO2021032285A1 (fr) Accès de groupe à une entité cible par avance de synchronisation prédite
US11849355B2 (en) Handover optimization using time sensitive communication assistance information
US11139882B2 (en) Enhanced beam adjustment procedure for beam-based operation
WO2023285099A1 (fr) Interfonctionnement entre un transfert de couche 3 (l3) et un changement intercellulaire centrique de couche 1 (l1)/couche 2 (l2)
US20240236905A1 (en) Efficient registration in an area where a service is supported partially
US11812322B2 (en) Channel state information reference signal configuration for inter-cell mobility
EP4030812A1 (fr) Direction des terminaux en cas de catastrophe
US20230268979A1 (en) Enhanced beam switching
US20230269813A1 (en) Slice aware pre-emption signaling and process
EP4369790A1 (fr) Acquisition précoce d'informations d'état de canal pour une cellule cible dans une mobilité intercellulaire de couche 1/couche 2
US20220279621A1 (en) Emergency operations slice exchange between entities in mobile networks
EP3716682A1 (fr) Mise à jour de ressources d'accès aléatoire sans contention lors d'un transfert conditionnel
WO2023135553A1 (fr) Interfonctionnement de multiples intervalles de module d'identité d'abonné universel et intervalles de mesure
CN117897993A (zh) 基于特定于装置类型的一个或多个条件而发起小数据传输
WO2021028820A1 (fr) Accès à une cellule secondaire primaire conditionnelle

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: 19758667

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: 19758667

Country of ref document: EP

Kind code of ref document: A1