# US 2021/0344446 A1 · Control method and device for a data packet duplication function, communication device, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0344446 A1 - Document ID: US20210344446A1 - Status: Published application - Kind: A1 - Application number: 17/305,659 - Filed: 2021-07-12 - Published: 2021-11-04 - Earliest claimed: 2017-05-05 - Assignees: Zte Corporation - Applicants: ZTE Corporation - Inventors: Wei ZOU; He HUANG - Web page: https://patentgrep.com/patent/US20210344446A1 ## CPC - H04L 1/18: Automatic repetition systems, e.g. Van Duuren systems - H04W 36/0007: {for multicast or broadcast services, e.g. MBMS (multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40)} - H04L 69/322: Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions - H04W 28/12: using signalling between network elements - H04W 36/00: Hand-off or reselection arrangements - H04W 76/15: Setup of multiple wireless link connections - H04W 76/27: Transitions between radio resource control [RRC] states - H04L 2101/622: Layer-2 addresses, e.g. medium access control [MAC] addresses - H04W 36/0069: {in case of dual connectivity, e.g. decoupled uplink/downlink} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided are a control method and device for a data packet duplication function, and a communication device. The control method for the data packet duplication function includes determining, by a communication device, to deactivate or activate a data packet duplication function; and performing, by the communication device, an operation of deactivating or activating the data packet duplication function correspondingly. Further provided is a storage medium. ## Claims ### Claim 1 A method for wireless communication, comprising: determining, by a user equipment operating in a dual-connectivity mode in which a radio bearer comprises a first radio link control (RLC) entity associated with a primary link connected to a first medium access control (MAC) entity and a second RLC entity associated with a secondary link connected to a second MAC entity, whether to deactivate or activate a data packet duplication function in response to a condition being satisfied; and deactivating or activating the data packet duplication function according to the determining, wherein the activating of the data packet duplication function comprises transmitting a data packet to the first RLC entity via the primary link and transmitting a duplicated data packet to the second RLC entity via the secondary link, and wherein the deactivating of the data packet duplication function comprises transmitting the data packet to the first RLC entity via the primary link only. ### Claim 2 (depends on 1) The method of claim 1, wherein the condition is satisfied upon the user equipment receiving an initial configuration of the radio bearer or a notification for an additional activation or deactivation of the data packet duplication function from a network node. ### Claim 3 (depends on 1) The method of claim 1, wherein the condition is related to a local data packet transmission status. ### Claim 4 (depends on 1) The method of claim 1, further comprising: preconfiguring, by the user equipment, one or more events associated with the radio bearer, wherein the condition is satisfied in case at least one of the one or more events occurs, and wherein information related to the at least one of the one or more events is transmitted between the user equipment and a network node. ### Claim 5 (depends on 4) The method of claim 4, wherein the determining comprises: determining to deactivate or activate the data packet duplication function based on the information related to the at least one of the one or more events, and wherein the method further comprises selecting, by the user equipment, a link between the primary link and the secondary link to deactivate or activate the data packet duplication function. ### Claim 6 (depends on 5) The method of claim 5, wherein the selected link is identified by a logical channel identification. ### Claim 7 (depends on 4) The method of claim 4, wherein the information related to the at least one of the one or more events is carried in a signaling message. ### Claim 8 (depends on 4) The method of claim 4, wherein the information related to the at least one of the one or more events is transmitted using an Xn interface. ### Claim 9 (depends on 1) The method of claim 1, wherein the condition is related to a signal-to-noise ratio, and wherein the determining comprises: determining to activate the data packet duplication function in response to the signal-to-noise ratio being greater than or equal to a first predetermined threshold; and/or determining to deactivate the data packet duplication function in response to the signal-to-noise ratio being less than or equal to a second predetermined threshold. ### Claim 10 (depends on 1) The method of claim 1, further comprising: transmitting, by the user equipment, a buffer state report associated with the radio bearer to a network node. ### Claim 11 A device for wireless communication configured to operate in a dual-connectivity mode in which a radio bearer comprises a first radio link control (RLC) entity associated with a primary link connected to a first medium access control (MAC) entity and a second RLC entity associated with a secondary link connected to a second MAC entity, comprising a processor configured to: determine whether to deactivate or activate a data packet duplication function in response to a condition being satisfied; and deactivate or activate the data packet duplication function according to the determining, wherein activating of the data packet duplication function comprises transmitting a data packet to the first RLC entity via the primary link and transmitting a duplicated data packet to the second RLC entity via the secondary link, and wherein deactivating of the data packet duplication function comprises transmitting the data packet to the first RLC entity via the primary link only. ### Claim 12 (depends on 11) The device of claim 11, wherein the condition is satisfied upon the device receiving an initial configuration of the radio bearer or a notification for an additional activation or deactivation of the data packet duplication function from a network node. ### Claim 13 (depends on 11) The device of claim 11, wherein the condition is related to a local data packet transmission status. ### Claim 14 (depends on 11) The device of claim 11, wherein the processor is configured to: preconfigure one or more events associated with the radio bearer, wherein the condition is satisfied in case at least one of the one or more events occurs, and wherein information related to the at least one of the one or more events is transmitted between the device and a network node. ### Claim 15 (depends on 14) The device of claim 14, wherein the processor is configured to determine whether to deactivate or activate the data packet duplication function based on the information related to the at least one of the one or more events, and wherein the processor is further configured to select a link between the primary link and the secondary link to deactivate or activate the data packet duplication function. ### Claim 16 (depends on 15) The device of claim 15, wherein the selected link is identified by a logical channel identification. ### Claim 17 (depends on 14) The device of claim 14, wherein the information related to the at least one of the one or more events is carried in a signaling message. ### Claim 18 (depends on 14) The device of claim 14, wherein the information related to the at least one of the one or more events is transmitted using an Xn interface. ### Claim 19 (depends on 11) The device of claim 11, wherein the condition is related to a signal-to-noise ratio, and wherein the processor is configured to: determine to activate the data packet duplication function in response to the signal-to-noise ratio being greater than or equal to a first predetermined threshold; and/or determine to deactivate the data packet duplication function in response to the signal-to-noise ratio being less than or equal to a second predetermined threshold. ### Claim 20 (depends on 11) The device of claim 11, wherein the processor is further configured to transmit a buffer state report associated with the radio bearer to a network node.