WO2025200026A1 - Duplication de pdcp - Google Patents

Duplication de pdcp

Info

Publication number
WO2025200026A1
WO2025200026A1 PCT/CN2024/085067 CN2024085067W WO2025200026A1 WO 2025200026 A1 WO2025200026 A1 WO 2025200026A1 CN 2024085067 W CN2024085067 W CN 2024085067W WO 2025200026 A1 WO2025200026 A1 WO 2025200026A1
Authority
WO
WIPO (PCT)
Prior art keywords
threshold
terminal device
priority level
determining
pdcp duplication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/085067
Other languages
English (en)
Inventor
Benoist Pierre Sebire
Chunli Wu
Sunyoung Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
Nokia Technologies Oy
Original Assignee
Nokia Shanghai Bell Co Ltd
Nokia Solutions and Networks Oy
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 Shanghai Bell Co Ltd, Nokia Solutions and Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co Ltd
Priority to PCT/CN2024/085067 priority Critical patent/WO2025200026A1/fr
Publication of WO2025200026A1 publication Critical patent/WO2025200026A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

Definitions

  • Various example embodiments relate to the field of communications and in particular, to devices, methods, apparatuses, and computer readable storage media for packet data convergence protocol (PDCP) duplication.
  • PDCP packet data convergence protocol
  • PDCP duplication (also referred to as PDCP packet duplication) is introduced as a means to increase reliability and reduce latency.
  • one or more secondary RLC entities i.e. one or more secondary legs
  • there are still some open problems in the PDCP duplication that will be studied in the near future.
  • example embodiments of the present disclosure provide a solution related to PDCP duplication.
  • a terminal device comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the terminal device at least to: determine a change of a priority level of a logical channel (LCH) of a radio bearer (RB) ; and one of the following: based on determining that the priority level increases or a priority value of the LCH decreases, activate packet data convergence protocol (PDCP) duplication for the RB; or based on determining that the priority level decreases or a priority value of the LCH increases, deactivate PDCP duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • a network device comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the network device at least to: determine one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB; and transmit the one or more thresholds to the terminal device.
  • LCH logical channel
  • RB radio bearer
  • a method comprises determining, at a terminal device, a change of a priority level of a logical channel (LCH) of a radio bearer (RB) ; and one of the following: based on determining that the priority level increases or a priority value of the LCH decreases, activating, at the terminal device, packet data convergence protocol (PDCP) duplication for the RB; or based on determining that the priority level decreases or a priority value of the LCH increases, deactivating, at the terminal device, PDCP duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • a method comprises determining, at a network device, one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB; and transmitting, at the network device, the one or more thresholds to the terminal device.
  • LCH logical channel
  • RB radio bearer
  • an apparatus comprises means for determining, at a terminal device, a change of a priority level of a logical channel (LCH) of a radio bearer (RB) ; and one of the following: means for, based on determining that the priority level increases or a priority value of the LCH decreases, activating, at the terminal device, packet data convergence protocol (PDCP) duplication for the RB; or means for, based on determining that the priority level decreases or a priority value of the LCH increases, deactivating, at the terminal device, PDCP duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • an apparatus comprises means for determining, at a network device, one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB;and means for transmitting, at the network device, the one or more thresholds to the terminal device.
  • LCH logical channel
  • RB radio bearer
  • PDCP packet data convergence protocol
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to any one of the above third and fourth aspects.
  • a computer program comprising instructions, which, when executed by an apparatus, cause the apparatus at least to perform at least the method according to any one of the above third and fourth aspects.
  • a terminal device comprising determining circuitry configured to determine a change of a priority level of a logical channel (LCH) of a radio bearer (RB) ; and one of the following: activating circuitry configured to, based on determining that the priority level increases or a priority value of the LCH decreases, activate packet data convergence protocol (PDCP) duplication for the RB; or deactivating circuitry configured to, based on determining that the priority level decreases or a priority value of the LCH increases, deactivate PDCP duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • a network device comprising determining circuitry configured to determine one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB; and transmitting circuitry configured to transmit the one or more thresholds to the terminal device.
  • LCH logical channel
  • RB radio bearer
  • PDCP packet data convergence protocol
  • FIG. 1B illustrates a schematic diagram of PDCP duplication associated with some embodiments of the present disclosure
  • FIG. 2 illustrates a signaling flow between a terminal device and a network device according to some example embodiments of the present disclosure
  • FIG. 4 illustrates a flowchart of a method implemented at a network device according to some embodiments of the present disclosure
  • FIG. 5 illustrates a simplified block diagram of a device that is suitable for implementing some example embodiments of the present disclosure.
  • FIG. 6 illustrates a block diagram of an example of a computer readable medium in accordance with some example embodiments of the present disclosure.
  • references in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
  • circuitry may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as new radio (NR) , long term evolution (LTE) , LTE-advanced (LTE-A) , wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , narrow band internet of things (NB-IoT) and so on.
  • NR new radio
  • LTE long term evolution
  • LTE-A LTE-advanced
  • WCDMA wideband code division multiple access
  • HSPA high-speed packet access
  • NB-IoT narrow band internet of things
  • the term “network device” refers to a node in a communication network via which a terminal device can access the communication network and receive services therefrom.
  • the network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , an NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto BS, a pico BS, and so forth, depending on the applied BS
  • terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a subscriber station (SS) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) .
  • UE user equipment
  • SS subscriber station
  • MS mobile station
  • AT access terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VoIP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (IoT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and/
  • a terminal device determines a change of a priority level of an LCH of an RB. If the priority level increases, the terminal device activates PDCP duplication for the RB. If the priority level decreases, the terminal device deactivates PDCP duplication for the RB.
  • FIG. 1A illustrates an example environment 100 in which example embodiments of the present disclosure can be implemented.
  • the environment 100 which may be a part of a communication network, comprises a terminal device 110 and a network device 120 communicating with each other.
  • the communication between the terminal device 110 and the network device 120 may be direct or indirect.
  • the terminal device 110 and the network device 120 may communicate with one or more further devices not shown in FIG. 1A.
  • the terminal device 110 may perform communications with the network device 120.
  • a link from the network device 120 to the terminal device 110 is referred to as a downlink (DL)
  • a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) .
  • the terminal device 110 and the network device 120 are described in the communication environment 100 of FIG. 1A, embodiments of the present disclosure may equally apply to any other suitable communication devices in communication with one another. That is, embodiments of the present disclosure are not limited to the exemplary scenarios of FIG. 1A.
  • the terminal device is schematically depicted as a mobile phone and the network device 120 is schematically depicted as a base station in FIG. 1A, it is understood that these depictions are exemplary in nature without suggesting any limitation.
  • the first device 110 and the network device 120 may be any other communication devices, for example, any other wireless communication devices.
  • the communication environment 100 may include any suitable number of communication devices and any suitable number of communication links for implementing embodiments of the present disclosure.
  • the communications in the environment 100 may follow any suitable communication standards or protocols, which are already in existence or to be developed in the future, such as Universal Mobile Telecommunications System (UMTS) , long term evolution (LTE) , LTE-Advanced (LTE-A) , the fifth generation (5G) New Radio (NR) , 6G, Wireless Fidelity (Wi-Fi) and Worldwide Interoperability for Microwave Access (WiMAX) standards, and employs any suitable communication technologies, including, for example, Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiplexing (OFDM) , time division multiplexing (TDM) , frequency division multiplexing (FDM) , code division multiplexing (CDM) , Bluetooth, ZigBee, and machine type communication (MTC) , enhanced mobile broadband (eMBB) , massive machine type communication (mMTC) , ultra-reliable low latency communication (URLLC) , Carrier Aggregation (CA) , Dual Connectivity (DC
  • FIG. 1B illustrates a schematic diagram of PDCP duplication associated with some embodiments of the present disclosure.
  • a primary RLC entity and a secondary RLC entity may be used for data transmission.
  • the secondary RLC entity may be used to transmit data duplicates.
  • FIG. 2 illustrates a signaling flow 200 between a terminal device and a network device according to some example embodiments of the present disclosure.
  • the signaling flow 200 will be described with reference to FIG. 1A.
  • the terminal device 110 determines a change of a priority level of an LCH of an RB.
  • the terminal device 110 may determine a change of a priority value of the LCH, which reflects the change of the priority level of the LCH.
  • a higher priority level may correspond to a lower priority value.
  • the RB may be configured with PDCP duplication.
  • the LCH may comprise a primary LCH of the RB.
  • the PDCP duplication may be associated with the priority level change of the primary LCH.
  • the LCH may comprise a secondary LCH, for example, a specific secondary LCH or a selected secondary LCH.
  • the terminal device 110 may determine the change of the priority level of the primary LCH in a variety of approaches. As an example, the terminal device 110 may receive an indication indicating the change of the priority level of the primary LCH from the network device 120, and then on this basis, the terminal device 110 may determine that the priority level of the primary LCH may be changed. As another example, the change of the priority level of the primary LCH may be determined by the terminal device 110 itself, without an indication associated with the change from the network device 120. As an example implementation, the terminal device 110 may determine that the priority level of the primary LCH may need to be changed based on a delay criterion associated with buffered data.
  • the terminal device 110 may determine to increase the priority level of the primary LCH. If the remaining time for the buffered data exceeds a second time threshold, the terminal device 110 may determine to decrease the priority level of the primary LCH.
  • the above time threshold (s) may be pre-defined or configured by the network device 120.
  • the terminal device 110 may determine that the priority level of the primary LCH may need to be changed based on the amount of the buffered data.
  • the terminal device 110 may increase the priority level of the primary LCH if the amount of the buffered data is above a first data threshold, and decrease the priority level of the primary LCH if the amount of the buffered data is below a second data threshold.
  • the above data threshold (s) may be pre-defined or configured by the network device 120.
  • the terminal device 110 activates PDCP duplication for the RB if the priority level of the primary LCH increases, or deactivates PDCP duplication for the RB if the priority level of the primary LCH decreases.
  • the terminal device 110 may activate PDCP duplication for the RB if the priority value of the primary LCH decreases, or deactivate PDCP duplication for the RB if the priority value of the primary LCH increases.
  • the priority level of the primary LCH increases or decreases as an example to discuss some embodiments, it should be appreciated that similar steps or features can be equally or similarly applicable to the expressions that the priority value of the primary LCH decreases or increases respectively.
  • the activation or the deactivation of the PDCP duplication may be performed considering one or more priority thresholds of the primary LCH.
  • only one priority threshold (also referred to as a first threshold) may be configured and used for activating and deactivating PDCP duplication.
  • the terminal device 110 may activate PDCP duplication for the RB if the priority level of the primary LCH is higher than or equal to the first threshold, and deactivate PDCP duplication for the RB if the priority level of the primary LCH is lower than the first threshold.
  • the terminal device 110 may activate PDCP duplication on one or more secondary LCHs (for example, all secondary LCH (s) ) if the priority level of the primary LCH is higher than or equal to the first threshold, and deactivate PDCP duplication on one or more secondary LCHs (for example, all secondary LCH (s) ) if the priority level of the primary LCH is lower than the first threshold.
  • secondary LCHs for example, all secondary LCH (s)
  • PDCP duplication may remain deactivated, and once PDCP duplication is activated, as long as the priority value remains lower than (or not more than) the second priority value threshold, PDCP duplication may remain active.
  • a plurality priority thresholds may be configured and used for activating or deactivating PDCP duplication on different secondary LCHs respectively.
  • the terminal device 110 may activate PDCP duplication on a first number of secondary LCHs (i.e., a first set of secondary LCHs) if the priority level of the primary LCH is not less than (or higher than) to a third threshold, and activate PDCP duplication on a second number of secondary LCHs (i.e., a second set of secondary LCHs) if the priority level of the primary LCH is not less than (or higher than) a fourth threshold.
  • the secondary LCHs may be selected to be activated based on their identities.
  • the third threshold may be configured for PDCP duplication on the first secondary LCH
  • the fourth threshold may be configured for PDCP duplication on the second secondary LCH.
  • the terminal device 110 may deactivate PDCP duplication on a third number of secondary LCHs, if the priority level of the primary LCH is lower than (or not more than) a fifth threshold, and deactivate PDCP duplication on a fourth number of secondary LCHs if the priority level of the primary LCH is lower than (or not more than) a sixth threshold.
  • the implementation details are similar, and for the purpose of simplification, the details will be omitted.
  • the above one or more priority thresholds may be configured in multiple ways. For example, as shown in FIG. 2, at 215, the network device 120 may determine the above one or more priority thresholds, and at 220, transmit the above one or more priority thresholds to the terminal device 110.
  • the one or more priority thresholds may be transmitted via an RRC signaling, and/or a MAC CE.
  • a respective one of the one or more priority thresholds may be indicated by an absolute value of the respective priority threshold.
  • a respective one of the one or more priority thresholds may be indicated by a difference value (i.e. a delta) relative to a previous priority level.
  • the above one or more priority thresholds may be pre-defined.
  • different propriety thresholds may be configured when the network device 120 is congested or not.
  • a respective one of the above one or more priority thresholds may comprise a first target threshold when the network device 120 is congested, or a second target threshold when the network device 120 is not congested.
  • a priority change of the primary LCH that takes place at the terminal device can be automatically accompanied by the activation or deactivation of PDCP duplication. This increases the chances of having urgent data reaching the network device without the extra delay and overhead caused by downlink MAC CE (s) . Otherwise, by the time the network device realizes that an LCH needs to increase its priority and sends a MAC CE in DL to activate PDCP duplication, the corresponding data might have already been discarded.
  • FIG. 3 illustrates a flowchart 300 of a method implemented at a terminal device according to some embodiments of the present disclosure. For the purpose of discussion, the method 300 will be described from the perspective of the terminal device 110 with reference to FIG. 1A.
  • the terminal device 110 determines a change of a priority level of a logical channel (LCH) of a radio bearer (RB) .
  • LCH logical channel
  • RB radio bearer
  • the terminal device 110 based on determining that the priority level increases, activates packet data convergence protocol (PDCP) duplication for the RB, or based on determining that the priority level decreases, deactivates PDCP duplication for the RB.
  • PDCP packet data convergence protocol
  • the terminal device 110 may, based on determining that the priority level is higher than or equal to a first threshold, activate PDCP duplication for the RB. In some example embodiments, to activate PDCP duplication for the RB, the terminal device 110 may activate PDCP duplication on one or more secondary LCHs. In some example embodiments, to deactivate PDCP duplication for the RB, the terminal device 110 may, based on determining that the priority level is lower than the first threshold, deactivate PDCP duplication for the RB.
  • the terminal device 110 may, based on determining that the priority level is lower than a second threshold, deactivate PDCP duplication for the RB. In some example embodiments, to deactivate PDCP duplication for the RB, the terminal device 110 may deactivate PDCP duplication on one or more secondary LCHs.
  • the terminal device 110 may, based on determining that the priority level is lower than a fifth threshold, deactivate PDCP duplication on a third number of secondary LCHs, and based on determining that the priority level is lower than a sixth threshold, deactivate PDCP duplication on a fourth number of secondary LCHs.
  • At least one of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold may be received from a network device 120. In some example embodiments, at least one of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold may be received via at least one of the following: a radio resource control (RRC) signaling; or a media access control control element (MAC CE) . In some example embodiments, a respective threshold of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold may be indicated by one of the following: an absolute value of the respective threshold; or a difference value relative to a previous priority level.
  • RRC radio resource control
  • MAC CE media access control control element
  • the terminal device 110 may, based on determining that a network device 120 is not congested, activate PDCP duplication for the RB. In some example embodiments, to determine that the network device 120 is not congested, the terminal device may determine that protocol data unit (PDU) set importance (PSI) based discarding is not activated.
  • PDU protocol data unit
  • PSI protocol data unit set importance
  • a respective threshold of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold may comprise one of the following: a first target threshold when a network device 120 is congested; or a second target threshold when the network device 120 is not congested.
  • the terminal device 110 may determine the change of the priority level at the terminal device without an indication associated with the change from a network device 120. In some example embodiments, to determine the change of the priority level of the primary LCH, the terminal device 110 may determine the change of the priority level based on one of the following: a delay criterion associated with buffered data; or an amount of the buffered data.
  • the terminal device may determine that a priority value of the LCH decreases, and/or to determine that the priority level decreases, the terminal device 110 may determine that a priority value of the LCH increases.
  • FIG. 4 illustrates a flowchart 400 of a method implemented at a network device according to some embodiments of the present disclosure. For the purpose of discussion, the method 400 will be described from the perspective of the network device 120 with reference to FIG. 1A.
  • the network device 120 determines one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device 110 to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • the network device 120 transmits the one or more thresholds to the terminal device 110.
  • the one or more thresholds may be transmitted via at least one of the following: a radio resource control (RRC) signaling; or a media access control control element (MAC CE) .
  • RRC radio resource control
  • MAC CE media access control control element
  • a respective threshold of the one or more thresholds may be indicated by one of the following: an absolute value of the respective threshold; or a difference value relative to a previous priority level.
  • a respective threshold of the one or more thresholds may comprise one of the following: a first target threshold when the network device 120 is congested; or a second target threshold when the network device 120 is not congested.
  • the primary LCH may comprise a primary LCH of the RB.
  • the one or more thresholds may comprise a first threshold, and the terminal device 110 may activate PDCP duplication for the RB if the priority level is higher than or equal to the first threshold. In some example embodiments, the terminal device 110 may activate PDCP duplication on one or more secondary LCHs. In some example embodiments, the terminal device 110 may deactivate PDCP duplication for the RB if the priority level is lower than the first threshold. In some example embodiments, the one or more thresholds further comprise a second threshold, and the terminal device 110 may deactivate PDCP duplication for the RB if the priority level is lower than the second threshold. In some example embodiments, the terminal device 110 may deactivate PDCP duplication on one or more secondary LCHs.
  • the one or more thresholds comprise a fifth threshold and a sixth threshold
  • the terminal device 110 may deactivate PDCP duplication on a third number of secondary LCHs if the priority level is lower than the fifth threshold
  • the terminal device 110 may deactivate PDCP duplication on a fourth number of secondary LCHs if the priority level is lower than the sixth threshold.
  • the network device 120 may further transmit, to the terminal device 110, an indication indicating a change of the priority level of the primary LCH.
  • the apparatus comprises means for determining a change of a priority level of a logical channel (LCH) of a radio bearer (RB) ; and one of the following: means for based on determining that the priority level increases, activating packet data convergence protocol (PDCP) duplication for the RB; or means for based on determining that the priority level decreases, deactivating PDCP duplication for the RB.
  • LCH logical channel
  • RB radio bearer
  • the primary LCH comprises a primary LCH of the RB.
  • the means for activating PDCP duplication for the RB comprises means for, based on determining that the priority level is higher than or equal to a third threshold, activating PDCP duplication on a first number of secondary LCHs; and means for, based on determining that the priority level is higher than or equal to a fourth threshold, activating PDCP duplication on a second number of secondary LCHs.
  • At least one of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold is received from a network device. In some example embodiments, at least one of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold is received via at least one of the following: a radio resource control (RRC) signaling; or a media access control control element (MAC CE) . In some example embodiments, a respective threshold of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold is indicated by one of the following: an absolute value of the respective threshold; or a difference value relative to a previous priority level.
  • RRC radio resource control
  • MAC CE media access control control element
  • the means for activating PDCP duplication for the RB comprises means for, based on determining that a network device is not congested, activating PDCP duplication for the RB.
  • the means for determining that the network device is not congested comprises means for determining that protocol data unit (PDU) set importance (PSI) based discarding is not activated.
  • PDU protocol data unit
  • PSI protocol set importance
  • a respective threshold of the first threshold, the second threshold, the third threshold, the fourth threshold, the fifth threshold, or the sixth threshold comprises one of the following: a first target threshold when a network device is congested; or a second target threshold when the network device is not congested.
  • the means for determining the change of the priority level of the primary LCH comprises means for determining the change of the priority level based on an indication indicating the change from a network device.
  • the means for determining the change of the priority level of the primary LCH comprises means for determining the change of the priority level at the terminal device without an indication associated with the change from a network device. In some example embodiments, the means for determining the change of the priority level of the primary LCH comprises means for determining the change of the priority level based on one of the following: a delay criterion associated with buffered data; or an amount of the buffered data.
  • the means for determining that the priority level increases comprises means for determining that a priority value of the LCH decreases and/or the means for determining that the priority level decreases comprises means for determining that a priority value of the LCH increases.
  • an apparatus capable of performing the method 400 may comprise means for performing the respective steps of the method 400.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for determining one or more thresholds of a priority level of a logical channel (LCH) of a radio bearer (RB) , the one or more thresholds being used for a terminal device to activate or deactivate packet data convergence protocol (PDCP) duplication for the RB; and means for transmitting the one or more thresholds to the terminal device.
  • LCH logical channel
  • RB radio bearer
  • the one or more thresholds are transmitted via at least one of the following: a radio resource control (RRC) signaling; or a media access control control element (MAC CE) .
  • RRC radio resource control
  • MAC CE media access control control element
  • a respective threshold of the one or more thresholds is indicated by one of the following: an absolute value of the respective threshold; or a difference value relative to a previous priority level.
  • a respective threshold of the one or more thresholds comprises one of the following: a first target threshold when the network device is congested; or a second target threshold when the network device is not congested.
  • the primary LCH comprises a primary LCH of the RB.
  • the one or more thresholds comprise a first threshold, and the terminal device activates PDCP duplication for the RB if the priority level is higher than or equal to the first threshold. In some example embodiments, the terminal device activates PDCP duplication on one or more secondary LCHs. In some example embodiments, the terminal device deactivates PDCP duplication for the RB if the priority level is lower than the first threshold. In some example embodiments, the one or more thresholds further comprise a second threshold, and the terminal device deactivates PDCP duplication for the RB if the priority level is lower than the second threshold. In some example embodiments, the terminal device deactivates PDCP duplication on one or more secondary LCHs.
  • the one or more thresholds comprise a fifth threshold and a sixth threshold
  • the terminal device deactivates PDCP duplication on a third number of secondary LCHs if the priority level is lower than the fifth threshold
  • the terminal device deactivates PDCP duplication on a fourth number of secondary LCHs if the priority level is lower than the sixth threshold.
  • the apparatus further comprises means for transmitting, to the terminal device, an indication indicating a change of the priority level of the primary LCH.
  • the apparatus further comprises means for performing other steps in some embodiments of the method 400.
  • the means comprises at least one processor and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
  • FIG. 5 illustrates a simplified block diagram of a device 500 that is suitable for implementing some example embodiments of the present disclosure.
  • the device 500 may be provided to implement the communication device, for example, the terminal device 110, or the network device 120 as shown in FIG. 1A.
  • the device 500 includes one or more processors 510, one or more memories 520 coupled to the processor 510, and one or more communication modules 540 coupled to the processor 510.
  • the embodiments of the present disclosure may be implemented by means of the program 530 so that the device 500 may perform any process of the disclosure as discussed with reference to FIG. 2.
  • the embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 530 may be tangibly contained in a computer readable medium which may be included in the device 500 (such as in the memory 520) or other storage devices that are accessible by the device 500.
  • the device 500 may load the program 530 from the computer readable medium to the RAM 522 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • non-transitory is a limitation of the medium itself (i.e., tangible, not a signal) as opposed to a limitation on data storage persistency (e.g., RAM vs.ROM) .

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

Abstract

Des modes de réalisation de la présente divulgation concernent une duplication du protocole de convergence de données par paquets (PDCP). Selon un aspect, un dispositif terminal détermine un changement d'un niveau de priorité d'un canal logique (LCH) d'un support radio (RB). Si le niveau de priorité augmente, le dispositif terminal active une duplication du PDCP pour le RB. Si le niveau de priorité diminue, le dispositif terminal désactive une duplication du PDCP pour le RB.
PCT/CN2024/085067 2024-03-29 2024-03-29 Duplication de pdcp Pending WO2025200026A1 (fr)

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20210176349A1 (en) * 2019-12-08 2021-06-10 Qualcomm Incorporated Packet data convergence protocol (pdcp) duplication enhancements
US20220046754A1 (en) * 2019-04-22 2022-02-10 Huawei Technologies Co., Ltd. Communication method and device
WO2022229294A1 (fr) * 2021-04-28 2022-11-03 Telefonaktiebolaget Lm Ericsson (Publ) Activation sélective de la duplication de pdcp pour le temps de survie
US20230361920A1 (en) * 2021-01-14 2023-11-09 Zte Corporation Method and apparatus for survival time and communication service availability

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US20220046754A1 (en) * 2019-04-22 2022-02-10 Huawei Technologies Co., Ltd. Communication method and device
US20210176349A1 (en) * 2019-12-08 2021-06-10 Qualcomm Incorporated Packet data convergence protocol (pdcp) duplication enhancements
US20230361920A1 (en) * 2021-01-14 2023-11-09 Zte Corporation Method and apparatus for survival time and communication service availability
WO2022229294A1 (fr) * 2021-04-28 2022-11-03 Telefonaktiebolaget Lm Ericsson (Publ) Activation sélective de la duplication de pdcp pour le temps de survie

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SPREADTRUM COMMUNICATIONS: "Consideration on activation/deactivation of PDCP duplication", 3GPP DRAFT; R2-1915028, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Reno, USA; 20191118 - 20191122, 8 November 2019 (2019-11-08), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051816955 *
ZTE: "Discussion on PDCP packet duplication in LTE", 3GPP DRAFT; R2-1801964, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, 14 February 2018 (2018-02-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , pages 1 - 4, XP051399056 *

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