Packet loss processing method and apparatus, and storage medium

Abstract

The present invention provides a packet loss processing method and apparatus, and a storage medium. The method comprises: executing packet data unit (PDU) packet loss processing on the basis of first information, the first information being information related to PDU set importance (PSI). The present invention achieves the objective of performing PDU packet loss processing on the basis of the PSI, thereby improving the utilization rate of air interface resources, improving the availability and reliability of PDU set QoS parameters, and improving the system capacity.

Description

Packet loss processing method and device, and storage medium Technical Field

[0001] The present disclosure relates to the field of communications, and in particular to a packet loss processing method and device, and a storage medium. Background Art

[0002] Currently, for extended reality (XR) services, a group of data packets may be used to write the payload of a packet data unit (PDU) set.

[0003] Summary of the Invention

[0004] In order to improve the service quality and reliability of PDU set processing, embodiments of the present disclosure provide a packet loss processing method and apparatus, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a packet loss processing method is provided. The method is performed by a first node and includes:

[0006] Based on the first information, packet data unit (PDU) loss processing is performed, where the first information is information related to a PDU set importance (PSI).

[0007] According to a second aspect of an embodiment of the present disclosure, a packet loss processing method is provided. The method is performed by a second node and includes:

[0008] Sending first information to a first node, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing; or

[0009] A PDU set quality of service (QoS) parameter is sent to the first node, where the PDU set QoS parameter is used to determine first information, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing.

[0010] According to a third aspect of an embodiment of the present disclosure, there is provided a first node, including:

[0011] The processing module is configured to perform packet data unit (PDU) loss processing based on first information, where the first information is information related to a PDU set importance (PSI).

[0012] According to a fourth aspect of an embodiment of the present disclosure, a second node is provided, including:

[0013] a transceiver module configured to send first information to a first node, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing; or

[0014] A PDU set quality of service (QoS) parameter is sent to the first node, where the PDU set QoS parameter is used to determine first information, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing.

[0015] According to a fifth aspect of an embodiment of the present disclosure, there is provided a first node, including:

[0016] one or more processors;

[0017] The processor is configured to execute the packet loss processing method according to any one of the first aspects.

[0018] According to a sixth aspect of an embodiment of the present disclosure, a second node is provided, including:

[0019] one or more processors;

[0020] The processor is used to execute the packet loss processing method described in any one of the second aspects.

[0021] According to the seventh aspect of an embodiment of the present disclosure, a communication system is provided, comprising a first node and a second node, wherein the first node is configured to implement the packet loss processing method described in any one of the first aspects, and the second node is configured to implement the packet loss processing method described in any one of the second aspects.

[0022] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, which stores instructions. When the instructions are executed on a communication device, the communication device executes the packet loss processing method as described in any one of the first aspect or the second aspect.

[0023] In an embodiment of the present disclosure, a first node may perform PDU packet loss processing based on first information, wherein the first information is information related to a PDU set importance (PSI). This achieves the purpose of performing PDU packet loss processing based on the PSI, improves air interface resource utilization, improves the availability and reliability of PDU set Quality of Service (QoS) parameters, and increases system capacity.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] FIG1A is an exemplary schematic diagram of the architecture of an access network device provided according to an embodiment of the present disclosure.

[0027] FIG1B is another exemplary schematic diagram of the architecture of an access network device provided according to an embodiment of the present disclosure.

[0028] FIG2A is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0029] FIG2B is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0030] FIG2C is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0031] FIG2D is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0032] FIG3A is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0033] FIG3B is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0034] FIG3C is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0035] FIG3D is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0036] FIG4A is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0037] FIG4B is an exemplary interactive diagram of a packet loss processing method provided according to an embodiment of the present disclosure.

[0038] FIG5A is a schematic diagram of an exemplary interaction of a first node provided according to an embodiment of the present disclosure.

[0039] FIG5B is a schematic diagram of an exemplary interaction of a second node provided according to an embodiment of the present disclosure.

[0040] FIG6A is a schematic diagram of an exemplary interaction of a communication device according to an embodiment of the present disclosure.

[0041] FIG6B is an exemplary interaction diagram of a chip provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0043] The embodiments of the present disclosure provide a packet loss processing method, device, and storage medium.

[0044] In a first aspect, an embodiment of the present disclosure provides a packet loss processing method, which is executed by a first node and includes:

[0045] Based on the first information, packet data unit (PDU) loss processing is performed, where the first information is information related to a PDU set importance (PSI).

[0046] In the above embodiment, the first node can perform PDU packet loss processing based on the first information related to PSI, thereby achieving the purpose of PDU packet loss processing based on PSI, improving the utilization of air interface resources, improving the availability and reliability of PDU set QoS parameters, and improving system capacity.

[0047] In conjunction with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following:

[0048] First indication information, where the first indication information is used to indicate whether to perform the PDU packet loss processing according to the PSI;

[0049] A packet loss timer, the packet loss timer being used to indicate the duration of performing the PDU packet loss processing according to the PSI;

[0050] Second indication information, where the second indication information is used to indicate at least one PSI level, and the at least one PSI level is used to determine a PSI level range corresponding to the packet loss timer.

[0051] In the above embodiment, the first information may include but is not limited to at least one of the above items, thereby achieving the purpose of performing PDU packet loss processing based on the PSI.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, performing packet data unit (PDU) loss processing based on the first information includes:

[0053] The first indication information is used to indicate that the PDU packet loss processing is performed according to the PSI. If the first PDU is not successfully transmitted before the packet loss timer expires, and the first PSI level corresponding to the first PDU is within the PSI level range indicated by the second indication information, the first PDU is discarded.

[0054] In the above embodiment, the first node can perform PDU packet loss processing based on the first information, thereby achieving the purpose of performing PDU packet loss processing based on the PSI and improving air interface resource utilization.

[0055] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0056] receiving a PDU set quality of service (QoS) parameter sent by the second node;

[0057] The first information is determined based on the PDU set QoS parameter.

[0058] In the above embodiment, the first information can be determined by the first node, which is simple to implement and has high availability.

[0059] In conjunction with some embodiments of the first aspect, in some embodiments, determining the first information based on the PDU set QoS parameter includes at least one of the following:

[0060] The first node supports processing the PDU set to determine the first indication information;

[0061] The PDU set QoS parameters include a PDU set delay budget PSDB, and information of the packet loss timer is determined based on the PSDB;

[0062] The at least one PSI level indicated by the second indication information is determined based on the PSI information included in the PDU set QoS parameters.

[0063] In the above embodiment, the first node can automatically determine the first information based on the PDU set QoS parameter, so as to achieve the purpose of performing PDU packet loss processing based on the PSI, with high availability.

[0064] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0065] A first message sent by a second node is received, where the first message includes the first information.

[0066] In the above embodiment, the first information can be determined by the second node and then provided to the first node through the first message. The first node does not need to determine the first information, thereby improving the utilization rate of air interface resources.

[0067] In combination with some embodiments of the first aspect, in some embodiments, the first node is a user plane gNB-CU-UP of a centralized unit of the network device, the second node is a control plane gNB-CU-CP of a centralized unit of the network device, and the first message is a first E1AP message; or

[0068] The first node is a distribution unit gNB-DU of a network device, the second node is a gNB-CU-CP, and the first message is a first F1AP message.

[0069] In conjunction with some embodiments of the first aspect, in some embodiments, the first E1AP message is at least one of the following:

[0070] Bearer context establishment request message;

[0071] Carrying context modification request message;

[0072] Bearer context modification confirmation message.

[0073] In conjunction with some embodiments of the first aspect, in some embodiments, the first F1AP message is at least one of the following:

[0074] Terminal context establishment request message;

[0075] Terminal context modification request message;

[0076] Terminal context modification confirmation message.

[0077] In the above embodiment, the existing message can be reused to provide the first information to the first node, which causes minor changes to the protocol and has high availability.

[0078] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0079] A second message is sent to the second node, where the second message includes second information, and the second information is used to determine the first information.

[0080] In the above embodiment, the first node may send the second information to the second node so that the second node can determine the first information, thereby improving the utilization rate of air interface resources and increasing system capacity.

[0081] In conjunction with some embodiments of the first aspect, in some embodiments, the second information includes at least one of the following:

[0082] Request indication information, where the request indication information is used to request execution of the PDU packet loss processing according to the PSI;

[0083] Wireless data carries DRB identification information, where the DRB identification information is used to identify the DRB that needs to perform the PDU packet loss processing according to the PSI.

[0084] In the above embodiment, the second information may include but is not limited to at least one of the above items, so that the second node can determine the first information, which is simple to implement and has high availability.

[0085] In combination with some embodiments of the first aspect, in some embodiments, the first node is a gNB-CU-UP, the second node is a gNB-CU-CP, and the second message is a second E1AP message; or

[0086] The first node is a gNB-DU, the second node is a gNB-CU-CP, and the second message is a second F1AP message.

[0087] In conjunction with some embodiments of the first aspect, in some embodiments, the second E1AP message is:

[0088] Carries context modification request messages.

[0089] In conjunction with some embodiments of the first aspect, in some embodiments, the second F1AP message is:

[0090] Terminal context modification request message.

[0091] In the above embodiment, the existing message can be reused to provide the second information to the second node, which causes minor changes to the protocol and has high availability.

[0092] In a second aspect, an embodiment of the present disclosure provides a packet loss processing method, which is executed by a second node and includes:

[0093] Sending first information to a first node, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing; or

[0094] A PDU set quality of service (QoS) parameter is sent to the first node, where the PDU set QoS parameter is used to determine first information, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing.

[0095] In the above embodiment, the second node can provide the first information, or PDU set QoS parameters, to the first node, so that the first node performs PDU packet loss processing based on the first information related to PSI, thereby achieving the purpose of PDU packet loss processing based on PSI, improving the utilization of air interface resources, improving the availability and reliability of PDU set QoS parameters, and improving system capacity.

[0096] In conjunction with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following:

[0097] First indication information, where the first indication information is used to indicate whether to perform the PDU packet loss processing according to the PSI;

[0098] A packet loss timer, the packet loss timer being used to indicate the duration of performing the PDU packet loss processing according to the PSI;

[0099] Second indication information, where the second indication information is used to indicate at least one PSI level, and the at least one PSI level is used to determine a PSI level range corresponding to the packet loss timer.

[0100] With reference to some embodiments of the second aspect, in some embodiments, sending the first information to the first node includes:

[0101] A first message is sent to the first node, where the first message includes the first information.

[0102] In combination with some embodiments of the second aspect, in some embodiments, the first node is a user plane gNB-CU-UP of a centralized unit of the network device, the second node is a control plane gNB-CU-CP of a centralized unit of the network device, and the first message is a first E1AP message; or

[0103] The first node is a distribution unit gNB-DU of a network device, the second node is a gNB-CU-CP, and the first message is a first F1AP message.

[0104] In conjunction with some embodiments of the second aspect, in some embodiments, the first E1AP message is at least one of the following:

[0105] Bearer context establishment request message;

[0106] Carrying context modification request message;

[0107] Bearer context modification confirmation message.

[0108] In conjunction with some embodiments of the second aspect, in some embodiments, the first F1AP message is at least one of the following:

[0109] Terminal context establishment request message;

[0110] Terminal context modification request message;

[0111] Terminal context modification confirmation message.

[0112] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0113] receiving a second message sent by the first node, where the second message includes second information;

[0114] Based on the second information, the first information is determined.

[0115] In conjunction with some embodiments of the second aspect, in some embodiments, the second information includes at least one of the following:

[0116] Request indication information, where the request indication information is used to request execution of the PDU packet loss processing according to the PSI;

[0117] Wireless data carries DRB identification information, where the DRB identification information is used to identify the DRB that needs to perform the PDU packet loss processing according to the PSI.

[0118] In combination with some embodiments of the second aspect, in some embodiments, the first node is a gNB-CU-UP, the second node is a gNB-CU-CP, and the second message is a second E1AP message; or

[0119] The first node is a gNB-DU, the second node is a gNB-CU-CP, and the second message is a second F1AP message.

[0120] With reference to some embodiments of the second aspect, in some embodiments, the second E1AP message is:

[0121] Carries context modification request messages.

[0122] In conjunction with some embodiments of the second aspect, in some embodiments, the second F1AP message is:

[0123] Terminal context modification request message.

[0124] In a third aspect, an embodiment of the present disclosure provides a first node, including:

[0125] The processing module is configured to perform packet data unit (PDU) loss processing based on first information, where the first information is information related to a PDU set importance (PSI).

[0126] In a fourth aspect, an embodiment of the present disclosure provides a second node, including:

[0127] a transceiver module configured to send first information to a first node, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing; or

[0128] A PDU set quality of service (QoS) parameter is sent to the first node, where the PDU set QoS parameter is used to determine first information, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing.

[0129] In a fifth aspect, an embodiment of the present disclosure provides a first node, including:

[0130] one or more processors;

[0131] The processor is configured to execute the packet loss processing method according to any one of the first aspects.

[0132] In a sixth aspect, an embodiment of the present disclosure provides a second node, including:

[0133] one or more processors;

[0134] The processor is used to execute the packet loss processing method described in any one of the second aspects.

[0135] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, including a first node and a second node, wherein the first node is configured to implement the packet loss processing method described in any one of the first aspects, and the second node is configured to implement the packet loss processing method described in any one of the second aspects.

[0136] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the packet loss processing method as described in any one of the first aspect or the second aspect.

[0137] It is understandable that the above nodes, communication systems, storage media, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods and will not be repeated here.

[0138] The present disclosure provides a packet loss handling method, apparatus, and storage medium. In some embodiments, the terms "packet loss handling method" and "information processing method" and "communication method" are interchangeable; the terms "packet loss handling apparatus" and "information processing apparatus" and "communication apparatus" are interchangeable; and the terms "information processing system" and "communication system" are interchangeable.

[0139] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0140] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0141] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0142] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0143] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0144] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0145] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0146] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0147] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0148] In some embodiments, a node can be interpreted as a physical or virtual node, and its name is not limited to the name described in the embodiment. In some cases, it can also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "entity", "subject", etc.

[0149] In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

[0150] In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", and in some embodiments may also be understood as "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

[0151] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0152] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0153] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0154] FIG1A is a schematic diagram showing an architecture of an access network device according to an embodiment of the present disclosure.

[0155] As shown in FIG1A , the access network device 100 may be composed of a central unit (CU) and a distributed unit (DU), that is, a CU-DU separation architecture is adopted.

[0156] In some embodiments, the access network device 100 may separate the user plane (UP) and the control plane (CP) of the CU.

[0157] In some embodiments, the access network device 100 may include but is not limited to a first node 101 , a second node 102 , and a third node 103 .

[0158] In some embodiments, the first node 101 may be the user plane of a centralized unit (gNB-CU-UP) of a network device.

[0159] The second node 102 may be the control plane of a centralized unit (gNB-CU-CP) of the network device.

[0160] The third node 103 may be a distribution unit gNB-DU of the network device.

[0161] FIG1B is another schematic diagram of the architecture of an access network device according to an embodiment of the present disclosure.

[0162] As shown in FIG1B , the access network device 100 ′ may be composed of a CU and a DU, that is, a CU-DU separation architecture is adopted.

[0163] In some embodiments, the access network device 100 ′ may separate the UP and CP of the CU.

[0164] In some embodiments, the access network device 100 ′ may include but is not limited to a first node 101 ′, a second node 102 ′, and a third node 103 ′.

[0165] In some embodiments, the first node 101' may be a gNB-DU.

[0166] The second node 102′ may be a gNB-CU-CP.

[0167] The third node 103′ may be a gNB-CU-UP.

[0168] In the above embodiment, the gNB-CU-UP and the gNB-CU-CP can communicate through the E1 interface.

[0169] In the above embodiment, the gNB-CU-UP and gNB-DU can communicate through the F1-U interface.

[0170] In the above embodiment, the gNB-CU-CP and gNB-DU can communicate via the F1-C interface.

[0171] In the above embodiment, the gNB-CU-CP may be responsible for the control plane functions of the Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), the gNB-CU-UP is responsible for the user plane functions of the GPRS Tunneling Protocol-User Plane (GTP-U), Service Data Adaptation Protocol (SDAP), and PDCP used in the GPRS network, and the gNB-DU is responsible for the Radio Link Control (RLC), Media Access Control (MAC), and Physical Layer (PHY) functions.

[0172] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0173] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0174] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A or FIG1B , or a portion of the subject, but are not limited thereto. The subjects shown in FIG1A or FIG1B are examples. The communication system may include all or part of the subjects in FIG1A or FIG1B , or may include other subjects other than those in FIG1A or FIG1B . The number and form of the subjects are arbitrary. The subjects may be physical or virtual. The connection relationship between the subjects is an example. The subjects may be connected or disconnected. The connection may be in any manner, directly or indirectly, and wired or wireless.

[0175] The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G New Radio (NR), 6th generation mobile communication system (6G), Future Radio Access (FRA), New Radio Access Technology (RAT), New Radio (NR), New Radio Access (NX), Future Generation Radio Access (FX), Global System for Mobile Communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, systems utilizing other communication methods, and next-generation systems based on these. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G) may also be used.

[0176] Currently, at the media layer, the messages in a PDU set are decoded / processed as a whole. For example, a frame can only be decoded if all packets carrying the frame or a certain number of packets are successfully sent.

[0177] For example, a frame in a Group of Pictures (GOP) can only be decoded by the client if all frames associated with it are successfully received. Therefore, the packets in a PDU set are inherently correlated at the media layer. If the correlation between messages in a PDU set is not considered, the 5G system may perform inefficient scheduling. For example, the 5G system may randomly discard messages but try to send other messages in the same PDU set, which are useless to the client, thereby wasting radio resources.

[0178] In some embodiments, PDU Set integrated packet processing defines the following PDU Set QoS parameters to support PDU Set processing:

[0179] 1. PDU Set Error Rate (PSER)

[0180] PSER defines an upper limit on the ratio of the number of PDU sets that were not successfully received within a measurement window to the total number of PDU sets sent to the receiver. It can be understood as defining an upper limit on the proportion of PDU sets processed by the sender of RLC that have not been successfully passed to the upper layer (such as PDCP) by the corresponding receiver. Therefore, PSER defines an upper limit for non-congestion related packet loss rate. The purpose of PSER is to allow appropriate link layer protocol configuration (such as RLC and HARQ). For each 5G QoS identifier (5QI), the value of PSER is the same in the uplink and downlink. If any PDU in the PDU Set is not successfully transmitted, the PDU Set is considered to be erroneous.

[0181] 2. PDU Set Delay Budget (PSDB).

[0182] The PSDB defines the upper bound on the transmission delay of a PDU set between the terminal and the N6 termination point on the User Port Function (UPF). This is the time from receipt of the first PDU to the successful delivery of the last arriving PDU. The PSDB applies to downlink PDU sets received by the UPF over the N6 interface and to uplink PDU sets sent by the terminal. For a given 5QI, the PSDB value is the same for both the uplink and downlink.

[0183] 3. PDU Set Integrated Handling Information (PSIHI)

[0184] The PSIHI indicates to the application layer whether all PDUs in the PDU set are required to use the PDU set.

[0185] To support PDU set-based QoS processing, the PDU Session Anchor-User Port Function (PSA-UPF) identifies the PDUs that belong to a PDU set and determines the following PDU set information that it sends in the GTP-U header to the Next Generation Radio Access Network (NG-RAN). As described above, the PDU set information is used by the NG-RAN for PDU set-based QoS processing.

[0186] The PDU set information may include but is not limited to at least one of the following:

[0187] -PDU Set Sequence Number (PSSN).

[0188] -Indication of End PDU of the PDU Set.

[0189] -PDU Sequence Number within a PDU Set (PSN).

[0190] -PDU Set Size in bytes.

[0191] -PDU Set Importance (PSI), which identifies the relative importance of a PDU set compared to other PDU sets in the QoS flow.

[0192] In some embodiments, at least one of the following packet loss handling methods may be considered:

[0193] The first is the packet loss processing method based on PSIHI.

[0194] When PSIHI is set for a QoS flow, as long as it is known that one PDU in a PDU set is lost, the remaining PDUs in the PDU set can be considered no longer needed by the application and can be discarded at the sending end to release radio resources.

[0195] The second method is to handle packet loss based on PSI.

[0196] In the CU-DU separation architecture, the PDU set QoS parameters are sent by the gNB-CU-CP to the gNB-CU-UP and gNB-DU. The gNB-CU-UP and gNB-DU process the uplink and downlink data of XR services based on the PDU set QoS parameters.

[0197] In the embodiments of the present disclosure, a packet loss processing method, device, and storage medium are provided, which can perform PDU packet loss processing based on PSI, improve air interface resource utilization, improve the availability and reliability of PDU set QoS parameters, and increase system capacity.

[0198] Figure 2A is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 2A , the present embodiment relates to a packet loss handling method, wherein the first node is a gNB-CU-UP and the second node is a gNB-CU-CP. The method includes:

[0199] Step S2101: The second node gNB-CU-CP sends PDU set QoS parameters to the first node gNB-CU-UP.

[0200] In some embodiments, the PDU set QoS parameters include but are not limited to at least one of the following: PSER; PSDB; PSIHI. In one example, the PDU set QoS parameters may further include PSI information.

[0201] The specific information content has been introduced in the above embodiments and will not be repeated here.

[0202] In some embodiments, the first node gNB-CU-UP receives the PDU set QoS parameters.

[0203] Step S2102: The first node gNB-CU-UP determines first information.

[0204] In some embodiments, the first information is information related to a PDU set importance PSI.

[0205] In some embodiments, the first information includes but is not limited to at least one of the following:

[0206] First instruction information;

[0207] Packet loss timer;

[0208] Second instruction information.

[0209] In one example, the first indication information is used to indicate whether to perform the PDU packet loss processing according to the PSI.

[0210] Exemplarily, the first indication information may be used to indicate starting or stopping, and correspondingly, to indicate starting to perform the PDU packet loss processing according to the PSI or stopping to perform the PDU packet loss processing according to the PSI.

[0211] Exemplarily, the first indication information may be used to indicate establishment or release, and correspondingly, to indicate the start of establishment of DU packet loss processing according to PSI or the release of PDU packet loss processing according to PSI.

[0212] In one example, the packet loss timer is used to indicate the duration of performing the PDU packet loss processing according to the PSI.

[0213] The duration corresponding to the packet loss timer can be an enumerated type (ENUMERATED), for example, ENUMERATED{ms0,ms2,ms4,ms6,ms8ms10,ms12,ms14,ms18,ms22,ms26,ms30,ms40,ms50,ms75,ms100}.

[0214] In an example, the second indication information is used to indicate at least one PSI level, and the at least one PSI level is used to determine a PSI level range corresponding to the packet loss timer.

[0215] Exemplarily, the selectable range of the PSI level may be {0..24-1}.

[0216] Illustratively, the higher the PSI level, the more important the PDU set is.

[0217] Exemplarily, the second indication information can be used to indicate a PSI level. In this case, it can be determined that the PSI level range corresponding to the packet loss timer is greater than or equal to the PSI level. For example, if the PSI level indicated by the second indication information is 10, the PSI level range corresponding to the packet loss timer is {10..24-1}.

[0218] Exemplarily, the second indication information can be used to indicate two PSI levels. In this case, the PSI level range corresponding to the packet loss timer can be determined based on these two PSI levels. For example, if the PSI levels indicated by the second indication information are 10 and 14, the PSI level range corresponding to the packet loss timer is {10, 11, 12, 13, 14}.

[0219] Alternatively, when the second indication information can be used to indicate two or more PSI levels, the PSI level corresponding to the packet loss timer is the PSI level indicated by the second indication information. For example, if the PSI levels indicated by the second indication information are 10 and 14, the PSI level corresponding to the packet loss timer is {10, 14}.

[0220] The above is only an exemplary description, and all information related to the PDU set importance PSI should fall within the scope of protection of this disclosure.

[0221] In some embodiments, the first information is determined for each DRB.

[0222] In some embodiments, the first information is determined for each PDU set.

[0223] In some embodiments, the first information is determined for each PSI level.

[0224] For example, different packet loss timers may correspond to different PSI levels. For example, the packet loss timer is determined based on each PSI level, packet loss timer #1 corresponds to PSI level #1, packet loss timer #2 corresponds to PSI level #2... For another example, the packet loss timer is determined based on each DRB, and a DRB may include one or more PDU sets. Packet loss timer #1 corresponds to PSI level #1 and PSI level #2, packet loss timer #2 corresponds to PSI level #3 and PSI level #4... For another example, the packet loss timer is determined based on each

[0225] Determined by the PDU set, packet loss timer #1 corresponds to PDU set #1 and PSI level #1, and packet loss timer #2 corresponds to PDU set #2 and PSI level #2.

[0226] In some embodiments, the name of the first information is not limited and can be interchangeable with PSI-related information, packet loss processing information, etc.

[0227] In some embodiments, the first node gNB-CU-UP determines the first information based on the PDU set QoS parameters.

[0228] In one example, if the first node gNB-CU-UP receives the PDU set QoS parameters and the first node gNB-CU-UP supports processing of the PDU set, the first node gNB-CU-UP can determine the first indication information. At this time, the first indication information can indicate to perform the PDU packet loss processing according to the PSI.

[0229] In one example, if the PDU set QoS parameters include a PSDB, the first node gNB-CU-UP may determine packet loss timer information based on the PSDB. For example, the duration of the fixed packet timer may be set to be less than, equal to, or greater than the PSDB value. For example, the duration of the fixed packet timer may be set to be twice the PSDB value.

[0230] In one example, the at least one PSI level indicated by the second indication information is determined based on the PSI information included in the PDU set QoS parameters.

[0231] Exemplarily, the PSI information included in the PDU set QoS parameters indicates that the PSI levels of multiple PDU sets are 1, 5, 10, and 11, respectively. The PSI level indicated by the second indication information may be 9, that is, PDU sets with a PSI level greater than or equal to 9 are less important and can be discarded when performing PSI-based packet loss processing.

[0232] Exemplarily, the PSI information included in the PDU set QoS parameters indicates that the PSI levels of multiple PDU sets are 1, 5, 10, and 11, respectively, and the PSI levels indicated by the second indication information may be 9 and 12, that is, the PDU sets with PSI levels in the range of [9, 12] are less important and can be discarded when performing PSI-based packet loss processing.

[0233] The above description is merely an example, and all schemes for the first node gNB-CU-UP to determine the first information should fall within the scope of protection of this disclosure.

[0234] In step S2103, the first node gNB-CU-UP performs PDU packet loss processing based on the first information.

[0235] In some embodiments, if the first indication information indicates that the PDU packet loss processing is to be performed according to the PSI, and if the first PDU is not successfully transmitted before the packet loss timer expires, and the first PSI level corresponding to the first PDU is within the PSI level range indicated by the second indication information, the first node gNB-CU-UP may discard the first PDU. The first PDU is any PDU to be sent or received by the first node gNB-CU-UP. Exemplarily, the first PDU is any downlink PDU or uplink PDU to be sent or received by the first node.

[0236] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0237] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0238] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0239] In some embodiments, terms such as "certain", "preseted", "preset", "setting", "indicated", "a certain", "any", "first", and "designated" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0240] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 can be implemented as an independent embodiment, step S2102 can be implemented as an independent embodiment, step S2103 can be implemented as an independent embodiment, step S2102 + step S2103 can be implemented as an independent embodiment, and steps S2101 to S2103 can be implemented as independent embodiments, but are not limited thereto.

[0241] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first information is determined by the second node gNB-CU-CP, step S2101 may not be performed.

[0242] In some embodiments, step S2102 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first node gNB-CU-UP directly obtains the first information from the second node gNB-CU-CP, step S2102 may not be performed.

[0243] In some embodiments, step S2103 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the gNB-DU performs packet loss handling, step S2103 may not be performed.

[0244] In some embodiments, steps S2101 to S2103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0245] In the above embodiment, the gNB-CU-UP can determine the first information itself and perform PDU loss handling based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PSI-based PDU loss handling, improves air interface resource utilization, enhances the availability and reliability of PDU set QoS parameters, and increases system capacity.

[0246] Figure 2B is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 2B , the present embodiment relates to a packet loss handling method, wherein the first node is a gNB-CU-UP and the second node is a gNB-CU-CP. The method includes:

[0247] In step S2201, the first node gNB-CU-UP sends second information to the second node gNB-CU-CP.

[0248] In some embodiments, the second node gNB-CU-CP receives the second information.

[0249] In some embodiments, the second information is used to determine the first information, and the first information is information related to the PDU set importance PSI.

[0250] In some embodiments, the second information may include, but is not limited to, at least one of the following:

[0251] Request indication information, where the request indication information is used to request execution of the PDU packet loss processing according to the PSI;

[0252] Data Radio Bearer (DRB) identification information, where the DRB identification information is used to identify the DRB for which the PDU packet loss processing needs to be performed according to the PSI.

[0253] In one example, the DRB identification information may include one or more DRB identifiers.

[0254] In one example, when the second information does not include DRB identification information, it can be used to indicate that PDU packet loss processing is performed for all DRBs according to PSI.

[0255] In some embodiments, the second information may be included in each DRB modification entry (DRB To Modify Item) information in the DRB modification list (DRB To Modify List). Exemplarily, each DRB modification entry information in the DRB modification list includes corresponding request indication information.

[0256] In some embodiments, the name of the second information is not limited and can be interchangeable with request indication information, DRB identification information, request message, etc.

[0257] In some embodiments, the first node gNB-CU-UP sends a second message to the second node gNB-CU-CP, including second information.

[0258] In one example, the second message may be a second E1 Application Protocol (E1AP) message.

[0259] Exemplarily, the second E1AP message may be a bearer context modification request message.

[0260] In some embodiments, the second node gNB-CU-CP may determine the first information based on the second information.

[0261] In one example, the second information includes the request indication information, and the second node gNB-CU-CP determines that the first node gNB-CU-UP wants the second node gNB-CU-CP to provide the first information to it. In this case, the second node gNB-CU-CP may determine the first information in the following manner:

[0262] Exemplarily, the second node gNB-CU-CP may determine first indication information based on the request indication information, where the first indication information is used to instruct to perform the PDU packet loss processing according to the PSI.

[0263] Exemplarily, the second node gNB-CU-CP may determine the duration of the packet loss timer based on the request indication information.

[0264] The duration corresponding to the packet loss timer can be an enumerated type (ENUMERATED), for example, ENUMERATED{ms0,ms2,ms4,ms6,ms8ms10,ms12,ms14,ms18,ms22,ms26,ms30,ms40,ms50,ms75,ms100}.

[0265] The second node gNB-CU-CP may configure a duration for the first node gNB-CU-UP from the above duration values.

[0266] Exemplarily, the second node gNB-CU-CP may determine the second indication information based on the request indication information, such as determining one or more PSI levels. If the second node gNB-CU-CP considers that PDUs with a PSI level higher than n are all low-priority PDUs, the second indication information may indicate the PSI level n. The first node gNB-CU-UP determines that PDUs with a PSI level higher than n are low-priority PDUs and may discard them.

[0267] In one example, the second information includes the DRB identification information, and the second node gNB-CU-CP may determine the first information for each DRB indicated by the DRB identification information. The specific determination scheme is similar to the scheme for determining the first information based on the request indication information, except that the first information determined here corresponds to each DRB identified by the DRB identification information.

[0268] The above description is merely an example. Any scheme in which the second node gNB-CU-CP determines the first information based on the second information should fall within the scope of protection of this disclosure.

[0269] In step S2202, the second node gNB-CU-CP sends first information to the first node gNB-CU-UP.

[0270] In some embodiments, the first node gNB-CU-UP receives the first information.

[0271] In some embodiments, the information content of the first information has been introduced in the aforementioned embodiments and will not be repeated here.

[0272] In some embodiments, the first information may be carried in PDCP configuration information. For example, information about the packet loss timer may be carried in PDCP configuration information.

[0273] In some embodiments, the first information is configured by the second node for each DRB.

[0274] In some embodiments, the first information is configured by the second node for each PDU set.

[0275] In some embodiments, the first information is configured by the second node for each PSI level.

[0276] In some embodiments, the second node gNB-CU-CP sends a first message to the first node gNB-CU-UP, which includes the first information.

[0277] In some embodiments, the first message is a first E1AP message.

[0278] In an example, the first E1AP message may include but is not limited to at least one of the following:

[0279] Bearer context establishment request message;

[0280] Carrying context modification request message;

[0281] Bearer context modification confirmation message.

[0282] In step S2203, the first node gNB-CU-UP performs PDU packet loss processing based on the first information.

[0283] In some embodiments, the process of the first node gNB-CU-UP performing PDU packet loss processing refers to the specific implementation process of step S2103 and is not repeated here.

[0284] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S2201 to S2203. For example, step S2201 can be implemented as an independent embodiment, step S2202 can be implemented as an independent embodiment, step S2203 can be implemented as an independent embodiment, step S2202 + step S2203 can be implemented as an independent embodiment, and steps S2201 to S2203 can be implemented as independent embodiments, but are not limited to these.

[0285] In some embodiments, step S2201 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the second node gNB-CU-CP proactively provides the first information to the first node gNB-CU-UP, step S2201 may not be performed. For another example, if the first node gNB-CU-UP determines the first information itself, step S2201 may not be performed.

[0286] In some embodiments, step S2202 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first node gNB-CU-UP determines the first information itself, step S2202 may not be performed.

[0287] In some embodiments, step S2203 is optional. One or more of these steps may be omitted or replaced in different embodiments. For example, if the gNB-DU performs packet loss handling, step S2203 may not be performed.

[0288] In some embodiments, steps S2201 to S2203 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0289] In the above embodiment, the gNB-CU-CP may determine first information and provide it to the gNB-CU-UP. The gNB-CU-UP may then perform PDU loss processing based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU loss processing based on the PSI, improves air interface resource utilization, enhances the availability and reliability of PDU set QoS parameters, and increases system capacity.

[0290] Figure 2C is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 2C , the present embodiment relates to a packet loss handling method, wherein the first node is a gNB-DU and the second node is a gNB-CU-CP. The method includes:

[0291] Step S2301: The second node gNB-CU-CP sends the PDU set QoS parameters to the first node gNB-DU.

[0292] In some embodiments, the PDU set QoS parameters include but are not limited to at least one of the following: PSER; PSDB; PSIHI. In one example, the PDU set QoS parameters may further include PSI information.

[0293] The specific information content has been introduced in the above embodiments and will not be repeated here.

[0294] In some embodiments, the first node gNB-DU receives the PDU set QoS parameters.

[0295] Step S2302: The first node gNB-DU determines the first information.

[0296] In some embodiments, the manner in which the first node gNB-DU determines the first information is similar to that in step S2102 and is not repeated here.

[0297] In step S2303, the first node gNB-DU performs PDU packet loss processing based on the first information.

[0298] In some embodiments, the first node gNB-DU performs PDU packet loss processing in a manner similar to that in step S2103 and is not repeated here.

[0299] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S2301 to S2303. For example, step S2301 can be implemented as an independent embodiment, step S2302 can be implemented as an independent embodiment, step S2303 can be implemented as an independent embodiment, step S2302 + step S2303 can be implemented as an independent embodiment, and steps S2301 to S2303 can be implemented as independent embodiments, but are not limited thereto.

[0300] In some embodiments, step S2301 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first information is determined by the second node gNB-CU-CP, step S2301 may not be performed.

[0301] In some embodiments, step S2302 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first node gNB-DU directly obtains the first information from the second node gNB-CU-CP, step S2302 may not be performed.

[0302] In some embodiments, step S2303 is optional. One or more of these steps may be omitted or replaced in different embodiments. For example, if the gNB-CU-UP performs packet loss handling, step S2303 may not be performed.

[0303] In some embodiments, steps S2301 to S2303 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0304] In the above embodiment, the gNB-DU can determine the first information itself and perform PDU loss handling based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU loss handling based on the PSI, improves air interface resource utilization, enhances the availability and reliability of the PDU set QoS parameters, and increases system capacity.

[0305] Figure 2D is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 2D , the present disclosure relates to a packet loss handling method, wherein the first node is a gNB-DU and the second node is a gNB-CU-CP. The method includes:

[0306] In step S2401, the first node gNB-DU sends second information to the second node gNB-CU-CP.

[0307] In some embodiments, the second node gNB-CU-CP receives the second information.

[0308] In some embodiments, the second information is used to determine the first information, and the first information is information related to the PDU set importance PSI. The specific content of the second information has been introduced in the above embodiments and will not be repeated here.

[0309] In some embodiments, the first node gNB-DU sends a second message to the second node gNB-CU-CP, including second information.

[0310] In one example, the second message may be a second F1 Application Protocol (F1AP) message.

[0311] Exemplarily, the second F1AP message may be a terminal context modification request message.

[0312] In some embodiments, the second node gNB-CU-CP may determine the first information based on the second information. The manner of determining the first information is similar to the manner of determining the first information in step S2201, and is not repeated here.

[0313] In step S2402, the second node gNB-CU-CP sends first information to the first node gNB-DU.

[0314] In some embodiments, the first node gNB-DU receives the first information.

[0315] In some embodiments, the information content of the first information has been introduced in the aforementioned embodiments and will not be repeated here.

[0316] In some embodiments, the second node gNB-CU-CP sends a first message to the first node gNB-DU, including the first information.

[0317] In some embodiments, the first message is a first F1AP message.

[0318] In an example, the first F1AP message may include but is not limited to at least one of the following:

[0319] Terminal context establishment request message;

[0320] Terminal context modification request message;

[0321] Terminal context modification confirmation message.

[0322] In step S2403, the first node gNB-DU performs PDU packet loss processing based on the first information.

[0323] In some embodiments, the process of the first node gNB-DU performing PDU packet loss processing is similar to the specific implementation process of step S2103 and is not repeated here.

[0324] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S2401 to S2403. For example, step S2401 can be implemented as an independent embodiment, step S2402 can be implemented as an independent embodiment, step S2403 can be implemented as an independent embodiment, step S2402 + step S2403 can be implemented as an independent embodiment, and steps S2401 to S2403 can be implemented as independent embodiments, but are not limited thereto.

[0325] In some embodiments, step S2401 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the second node gNB-CU-CP proactively provides the first information to the first node gNB-DU, step S2401 may not be performed. For another example, if the first node gNB-DU determines the first information itself, step S2401 may not be performed.

[0326] In some embodiments, step S2402 is optional, and one or more of these steps may be omitted or replaced in different embodiments. For example, if the first node gNB-DU determines the first information itself, step S2402 may not be performed.

[0327] In some embodiments, step S2403 is optional. One or more of these steps may be omitted or replaced in different embodiments. For example, if the gNB-CU-UP performs packet loss handling, step S2403 may not be performed.

[0328] In some embodiments, steps S2401 to S2403 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0329] In the above embodiment, the gNB-CU-CP may determine first information and provide it to the gNB-DU. The gNB-DU may then perform PDU loss processing based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU loss processing based on the PSI, improves air interface resource utilization, enhances the availability and reliability of PDU set QoS parameters, and increases system capacity.

[0330] Figure 3A is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 3A , the present embodiment relates to a packet loss handling method, which may be performed by a first node, which may be a gNB-CU-UP or a gNB-DU. The method includes:

[0331] Step S3101, obtain PDU set QoS parameters.

[0332] In some embodiments, the first node may obtain the PDU set QoS parameters from the second node, but is not limited thereto. The first node may also receive the PDU set QoS parameters sent by another entity. The second node may be a gNB-CU-CP.

[0333] In some embodiments, the first node obtains a PDU set QoS parameter determined according to a predefined rule.

[0334] In some embodiments, the first node performs processing to obtain the PDU set QoS parameter.

[0335] In some embodiments, step S3101 is omitted, the first node autonomously implements the function indicated by the PDU set QoS parameters, or the first node obtains the PDU set QoS parameters based on predefined rules or protocol agreements, or the above functions are default or default.

[0336] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, and will not be repeated here.

[0337] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation of step S3101 can refer to the optional implementation of step S2201 in Figure 2C and other related parts of the embodiment involved in Figure 2C, and will not be repeated here.

[0338] Step S3102, determine the first information.

[0339] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation method of step S3102 can refer to the optional implementation method of step S2102 in Figure 2A and other related parts in the embodiment involved in Figure 2A, and will not be repeated here.

[0340] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation of step S3102 can refer to the optional implementation of step S2202 in Figure 2C and other related parts of the embodiment involved in Figure 2C, and will not be repeated here.

[0341] Step S3103: perform PDU packet loss processing.

[0342] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation method of step S3103 can refer to the optional implementation method of step S2103 in Figure 2A and other related parts in the embodiment involved in Figure 2A, and will not be repeated here.

[0343] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation of step S3103 can refer to the optional implementation of step S2203 in Figure 2C and other related parts of the embodiment involved in Figure 2C, and will not be repeated here.

[0344] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 can be implemented as an independent embodiment, step S3102 can be implemented as an independent embodiment, step S3103 can be implemented as an independent embodiment, step S3102 + step S3103 can be implemented as an independent embodiment, and steps S3101 to S3103 can be implemented as independent embodiments, but are not limited thereto.

[0345] In some embodiments, steps S3101 to S3103 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0346] In the above embodiment, the first node can determine the first information itself and perform PDU packet loss processing based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU packet loss processing based on the PSI, improves air interface resource utilization, increases the availability and reliability of the PDU set QoS parameters, and enhances system capacity.

[0347] Figure 3B is a schematic diagram illustrating an interaction of a packet loss handling method according to an embodiment of the present disclosure. As shown in Figure 3B , the present embodiment relates to a packet loss handling method, which can be performed by a first node, which can be a gNB-CU-UP or a gNB-DU. The method includes:

[0348] Step S3201, sending the second information.

[0349] In some embodiments, the first node may send the second information to the second node. The second information is used to determine the first information. The second node may be a gNB-CU-CP.

[0350] In some embodiments, the second node receives the second information.

[0351] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation method of step S3201 can refer to the optional implementation method of step S2201 in Figure 2B and other related parts in the embodiments involved in Figure 2B, and will not be repeated here.

[0352] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation of step S3201 can refer to the optional implementation of step S2401 in Figure 2D and other related parts of the embodiment involved in Figure 2D, which are not repeated here.

[0353] Step S3202, obtain first information.

[0354] In some embodiments, the first node may obtain the first information from the second node, but is not limited thereto. The first node may also receive the first information sent by another entity. The second node may be a gNB-CU-CP.

[0355] In some embodiments, the first node obtains first information determined according to a predefined rule.

[0356] In some embodiments, the first node performs processing to obtain the first information.

[0357] In some embodiments, step S3202 is omitted, the first node autonomously implements the function indicated by the first information, or the first node obtains the first information based on predefined rules or protocol agreements, or the above functions are default or default.

[0358] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation method of step S3202 can refer to the optional implementation method of step S2202 in Figure 2B and other related parts in the embodiments involved in Figure 2B, and will not be repeated here.

[0359] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation method of step S3202 can refer to the optional implementation method of step S2202 in Figure 2D and other related parts of the embodiment involved in Figure 2D, which are not repeated here.

[0360] Step S3203: perform PDU packet loss processing.

[0361] In some embodiments, when the first node is a gNB-CU-UP and the second node is a gNB-CU-CP, the optional implementation method of step S3203 can refer to the optional implementation method of step S2203 in Figure 2B and other related parts in the embodiments involved in Figure 2B, which are not repeated here.

[0362] In some embodiments, when the first node is a gNB-DU and the second node is a gNB-CU-CP, the optional implementation of step S3203 can refer to the optional implementation of step S2403 in Figure 2D and other related parts of the embodiment involved in Figure 2D, and will not be repeated here.

[0363] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S3201 to S3203. For example, step S3201 can be implemented as an independent embodiment, step S3202 can be implemented as an independent embodiment, step S3203 can be implemented as an independent embodiment, step S3202 + step S3203 can be implemented as an independent embodiment, and steps S3201 to S3203 can be implemented as independent embodiments, but are not limited thereto.

[0364] In some embodiments, steps S3201 to S3203 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0365] In the above embodiment, the second node gNB-CU-CP may determine first information and provide it to the first node. The first node may then perform PDU loss processing based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU loss processing based on the PSI, improves air interface resource utilization, enhances the availability and reliability of PDU set QoS parameters, and increases system capacity.

[0366] FIG3C is an interactive diagram illustrating a packet loss handling method according to an embodiment of the present disclosure. As shown in FIG3C , the present embodiment relates to a packet loss handling method, which may be performed by a second node, which may be a gNB-CU-CP. The method includes:

[0367] Step S3301: Send PDU set QoS parameters.

[0368] In some embodiments, the second node may send the PDU set QoS parameters to the first node, where the first node may be a gNB-CU-UP or a gNB-DU.

[0369] In some embodiments, the first node receives the PDU set QoS parameters.

[0370] In some embodiments, the optional implementation method of step S3301 can refer to the optional implementation method of step S2101 in Figure 2A and other related parts in the embodiment involved in Figure 2A, or the optional implementation method of step S3301 can refer to the optional implementation method of step S2301 in Figure 2C and other related parts in the embodiment involved in Figure 2C, which will not be repeated here.

[0371] In some embodiments, step S3301 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0372] In the above embodiment, the second node can send the PDU set QoS parameters to the first node, so that the first node can determine first information related to the PDU set importance (PSI) and perform PDU packet loss processing based on the first information. This achieves the purpose of PSI-based PDU packet loss processing, improves air interface resource utilization, enhances the availability and reliability of the PDU set QoS parameters, and increases system capacity.

[0373] FIG3D is an interactive diagram illustrating a packet loss handling method according to an embodiment of the present disclosure. As shown in FIG3D , the present embodiment relates to a packet loss handling method, which may be performed by a second node, which may be a gNB-CU-CP. The method includes:

[0374] Step S3401, obtain second information.

[0375] In some embodiments, the second node may obtain the second information from the first node, but is not limited thereto. The second node may also receive the second information sent by another entity. The first node may be a gNB-CU-UP or a gNB-DU.

[0376] In some embodiments, the second node obtains second information determined according to a predefined rule.

[0377] In some embodiments, the second node performs processing to obtain the second information.

[0378] In some embodiments, step S3401 is omitted, the second node autonomously implements the function indicated by the second information, or the second node obtains the second information based on predefined rules or protocol agreements, or the above functions are default or default.

[0379] In some embodiments, the optional implementation of step S3401 can refer to the optional implementation of step S2201 in Figure 2B and other related parts of the embodiment involved in Figure 2B, or the optional implementation of step S3401 can refer to the optional implementation of step S2401 in Figure 2D and other related parts of the embodiment involved in Figure 2D, which will not be repeated here.

[0380] Step S3402, sending the first information.

[0381] In some embodiments, the second node may determine the first information based on the second information, and then send the first information to the first node.

[0382] In some embodiments, the first node receives the first information.

[0383] In some embodiments, the optional implementation method of step S3402 can refer to the optional implementation method of step S2202 in Figure 2B and other related parts in the embodiment involved in Figure 2B, or the optional implementation method of step S3402 can refer to the optional implementation method of step S2402 in Figure 2D and other related parts in the embodiment involved in Figure 2D, which will not be repeated here.

[0384] In some embodiments, the packet loss processing method involved in the embodiments of the present disclosure may include at least one of steps S3401 and S3402. For example, step S3401 can be implemented as an independent embodiment, step S3402 can be implemented as an independent embodiment, and steps S3401 and S3402 can be implemented as independent embodiments, but are not limited thereto.

[0385] In some embodiments, steps S3401 to S3402 are optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0386] In the above embodiment, the second node can determine the first information and provide it to the first node, so that the first node can determine the first information and perform PDU packet loss processing based on the first information, where the first information is information related to the PDU set importance (PSI). This achieves the purpose of PDU packet loss processing based on the PSI, improves air interface resource utilization, increases the availability and reliability of the PDU set QoS parameters, and enhances system capacity.

[0387] The above process is further illustrated by the following examples:

[0388] In the embodiments of the present disclosure, the first node may be a gNB-CU-UP or a gNB-DU, and the second node may be a gNB-CU-CP.

[0389] In the embodiment of the present disclosure, importance-based PDU packet loss processing can be performed using the following two methods, thereby improving air interface resource utilization and increasing system capacity.

[0390] Method 1: The gNB-CU-CP and / or gNB-DU decide whether to perform low-priority packet loss. The gNB-CU-CP determines a packet loss timer. The gNB-CU-CP sends a packet loss timer and / or a low-priority packet loss indication to the gNB-CU-UP and / or gNB-DU.

[0391] Method 2: The gNB-CU-UP and / or gNB-DU decide whether to perform low-priority packet drop. The gNB-CU-CP determines the packet drop timer. The gNB-CU-UP and / or gNB-DU requests the gNB-CU-CP to perform priority packet drop. The gNB-CU-CP sends the packet drop timer to the gNB-CU-UP and / or gNB-DU.

[0392] First, the first node executes:

[0393] A low-priority packet loss operation is performed according to the first information.

[0394] Based on the above, the first information includes at least one of the following information:

[0395] -First indication information, used to indicate whether to perform a low-priority packet loss operation;

[0396] -Discard timer, used to control the discard time of data packets;

[0397] - Importance indication, used to indicate the importance level of the PDU set applied by the discard timer.

[0398] In some embodiments, the discard timer is used for low priority PDUs.

[0399] In some embodiments, the first information is configured for each DRB; in other embodiments, the first information is configured for each PDU set; in yet other embodiments, the first information is configured for the importance of each PDU set.

[0400] Based on the above, the first node determines the first information by at least one of the following methods:

[0401] -The first node determines first information according to the QoS parameter;

[0402] - The first node receives first information from the second node.

[0403] Based on the above, the first node determines the first information according to the QoS parameter, including: the first node determines the first information according to the PDU set QoS parameter.

[0404] In some embodiments, if the first node receives the PDU set QoS parameter from the second node and the first node supports processing of the PDU set, the first node determines to perform PDU set-based packet loss (ie, determines the first indication information).

[0405] In some embodiments, if the first node receives from the second node a PDU set QoS parameter including a PSDB, the first node determines a value of a discard timer according to the PSDB.

[0406] In some embodiments, different packet loss timers may correspond to different PSI levels.

[0407] Based on the above, the first node receives the first information from the second node, including:

[0408] The first node receives first information from the second node via a first message.

[0409] In some embodiments, the first node is a gNB-CU-UP, the second node is a gNB-CU-CP, and the first message is an E1AP message, wherein the E1AP message may be a bearer context establishment request message, a bearer context modification request message, and / or a bearer context modification confirmation message, etc.

[0410] In some embodiments, the first node is a gNB-DU, the second node is a gNB-CU-CP, and the first message is an F1AP message, wherein the E1AP message may be a UE context establishment request message, a UE context modification request message, and / or a UE context modification confirmation message, etc.

[0411] Based on the above, the first information is determined by the second node based on the second information, wherein the second information is received from the first node.

[0412] Based on the above, the second information includes at least one of the following information:

[0413] -Request an indication of low priority packet loss;

[0414] -DRB ID(s), used to indicate the DRB corresponding to the requested low-priority packet loss, which can be one or more DRB IDs.

[0415] Based on the above, the second information is included in the second message sent by the first node to the second node.

[0416] In some embodiments, the first node is a gNB-CU-UP, the second node is a gNB-CU-CP, and the first message is an E1AP message, wherein the E1AP message may be a bearer context modification request message, etc.

[0417] In some embodiments, the first node is a gNB-DU, the second node is a gNB-CU-CP, and the first message is an F1AP message, wherein the E1AP message may be a UE context modification requirement message, etc.

[0418] Example 1 corresponds to the above method 1.

[0419] In a CU-DU separation scenario, the first node is the gNB-CU-UP and the second node is the gNB-CU-CP. The first node initiates or stops PDU loss handling. It is understood that in a dual connectivity (DC) scenario, the master eNode (MN) may notify the secondary eNode (SN).

[0420] 4A is an interactive diagram of a packet loss processing method according to an embodiment of the present disclosure. The method includes:

[0421] In step S4101, the gNB-CU-CP (second node) sends an E1AP message (first E1AP message) to the gNB-CU-UP (first node).

[0422] The E1AP message may be at least one of a bearer context establishment request, a bearer context modification request message, and a bearer context modification confirmation message.

[0423] The E1AP message includes first information, which includes at least one of the following: a discard timer for discarding low-priority packets; packet loss operation indication information (ie, first indication information); and PSI level indication information (ie, second indication information).

[0424] In some embodiments, a discard timer for low priority packet discard is included in the PDCP configuration information.

[0425] In some embodiments, the value of the discard timer for discarding low-priority packets is ENUMERATED{ms0,ms2,ms4,ms6,ms8ms10,ms12,ms14,ms18,ms22,ms26,ms30,ms40,ms50,ms75,ms100}.

[0426] In some embodiments, the packet loss operation indication may include two values ​​(ie, start, stop or setup, release).

[0427] In step S4102, the gNB-CU-UP (first node) starts or stops performing PDU packet loss processing according to the PSI.

[0428] In some embodiments, the gNB-CU-UP (first node) may start performing PDU packet loss processing according to the PSI or stop performing PDU packet loss processing according to the PSI based on the packet loss operation indication information included in the first information.

[0429] In some embodiments, for each requested DRB, if the PDCP configuration includes a discard timer for low priority packet discard, and if the gNB-CU-UP supports processing of PDU sets, the gNB-CU-UP shall perform packet discard processing for the PDUs corresponding to the DRB based on the received discard timer for low priority packet discard.

[0430] In some embodiments, the gNB-CU-UP receives a PDU from the UPF or the gNB-DU, determines a PDU for which a packet loss handling operation needs to be performed based on PDU set information in the PDU, such as the importance of the PDU set, and determines to discard the PDU if the PDU has not been successfully transmitted after a discard timer for discarding low-priority packets expires.

[0431] In some embodiments, if the packet loss action indication is set to start, the gNB-CU-UP performs packet loss action according to the discard timer for low priority packet discard.

[0432] In some embodiments, if the packet loss action indication is set to stop, the gNB-CU-UP stops performing packet loss actions according to the discard timer for low priority packet discard.

[0433] Example 2 corresponds to the above method 2.

[0434] In a CU-DU split scenario, the first node is the gNB-CU-UP and the second node is the gNB-CU-CP. The first node sends second information to the second node, so that the second node provides the first information to the first node.

[0435] In step S4201, the gNB-CU-UP (first node) sends an E1AP message (second E1AP message) to the gNB-CU-CP (second node) gNB-CU-UP (first node).

[0436] The second E1AP message may be a bearer context modification request message, wherein the second E1AP message includes request indication information (information for indicating a low-priority packet loss operation), and the request indication information is used to request execution of PDU packet loss processing according to the PSI.

[0437] In some embodiments, information for indicating a low-priority packet loss operation is included in each DRB modification entry (DRB To Modify Item) information in a DRB modification list (DRB To Modify List), that is, it is used to request that a specific DRB needs to perform a low-priority packet loss operation.

[0438] In some embodiments, the information indicating the low priority packet loss operation is for all DRBs.

[0439] In some embodiments, the information indicating the low priority packet loss operation corresponds to one or more DRB IDs.

[0440] In step S4202, the gNB-CU-CP includes the discard timer for discarding low-priority packets in the first message based on the second information and sends it to the gNB-CU-UP.

[0441] The first message may be a bearer context modification confirmation message. The specific application of the discard timer is consistent with that described in step S4101 and will not be repeated here.

[0442] Furthermore, the first node gNB-CU-UP may continue to determine the first information based on the second information, and then start or stop performing PDU packet loss processing according to the PSI based on the first message (not shown in FIG4B ).

[0443] The present disclosure also provides an apparatus for implementing any of the above methods. For example, a device is provided that includes units or modules for implementing each step performed by the first node in any of the above methods. For another example, another device is provided that includes units or modules for implementing each step performed by the second node in any of the above methods.

[0444] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0445] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0446] FIG5A is a schematic diagram of the structure of a first node proposed in an embodiment of the present disclosure. As shown in FIG5A , the first node 5100 may include: a processing module 5101 .

[0447] In some embodiments, the processing module 5101 is configured to perform packet data unit (PDU) loss processing based on first information, where the first information is information related to a PDU set importance (PSI).

[0448] In some embodiments, the first node 5100 may further include a transceiver module 5102 (not shown in FIG. 5A ), configured to receive the first information sent by the second node.

[0449] Optionally, the above-mentioned processing module 5101 is used to execute at least one of the other steps (for example, step S2102, step S2103, step S2203, step S2302, step S2303, step S2403, but not limited to these) performed by the first node 5100 in any of the above methods, which are not repeated here.

[0450] Optionally, the above-mentioned transceiver module 5102 is used to execute at least one of the communication steps such as sending and / or receiving performed by the first node 5100 in any of the above methods (for example, step S2101, step S2201, step S2202, step S2301, step S2401, step S2402, but not limited to these), which will not be repeated here.

[0451] FIG5B is a schematic diagram of the structure of a second node proposed in an embodiment of the present disclosure. As shown in FIG5B , the second node 5200 may include: a transceiver module 5201 .

[0452] In some embodiments, the transceiver module 5201 is configured to send first information to the first node, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing; or

[0453] A PDU set quality of service (QoS) parameter is sent to the first node, where the PDU set QoS parameter is used to determine first information, where the first information is information related to a packet data unit (PDU) set importance (PSI), and the first information is used by the first node to perform PDU packet loss processing.

[0454] Optionally, the above-mentioned transceiver module 5201 is used to execute at least one of the communication steps such as sending and / or receiving performed by the second node 5200 in any of the above methods (for example, step S2101, step S2201, step S2202, step S2301, step S2401, step S2402, but not limited to these), which will not be repeated here.

[0455] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0456] In some embodiments, the processing module can be a single module or can include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be interchangeable with the processor.

[0457] Figure 6A is a schematic diagram of the structure of a communication device 6100 proposed in an embodiment of the present disclosure. Communication device 6100 can be a network device (e.g., a first node, a second node, etc.), or a chip, a chip system, or a processor that supports the network device in implementing any of the above methods. Communication device 6100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0458] As shown in Figure 6A, the communication device 6100 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 6100 is used to perform any of the above methods. Optionally, one or more processors 6101 are used to call instructions to enable the communication device 6100 to perform any of the above methods.

[0459] In some embodiments, the communication device 6100 further includes one or more transceivers 6102. When the communication device 6100 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps (e.g., steps S2101, S2201, S2202, S2301, S2401, and S2402, but not limited thereto) of sending and / or receiving in the above method, and the processor 6101 performs at least one of the other steps (e.g., steps S2102, S2103, S2203, S2302, S2303, and S2403, but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, terms such as transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface can be replaced with each other, terms such as transmitter, transmitting unit, transmitter, and transmitting circuit can be replaced with each other, and terms such as receiver, receiving unit, receiver, and receiving circuit can be replaced with each other.

[0460] In some embodiments, the communication device 6100 further includes one or more memories 6103 for storing data. Alternatively, all or part of the memories 6103 may be located outside the communication device 6100. In alternative embodiments, the communication device 6100 may include one or more interface circuits 6104. Optionally, the interface circuits 6104 are connected to the memory 6102 and may be configured to receive data from the memory 6102 or other devices, or to send data to the memory 6102 or other devices. For example, the interface circuits 6104 may read data stored in the memory 6102 and send the data to the processor 6101.

[0461] The communication device 6100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 6100 described in the present disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited to FIG6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0462] 6B is a schematic diagram of the structure of a chip 6200 according to an embodiment of the present disclosure. If the communication device 6100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 6200 shown in FIG6B , but the present disclosure is not limited thereto.

[0463] The chip 6200 includes one or more processors 6201. The chip 6200 is configured to execute any of the above methods.

[0464] In some embodiments, chip 6200 further includes one or more interface circuits 6202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 6200 further includes one or more memories 6203 for storing data. Alternatively, all or part of memory 6203 may be located external to chip 6200. Optionally, interface circuit 6202 is connected to memory 6203 and may be used to receive data from memory 6203 or other devices, or may be used to send data to memory 6203 or other devices. For example, interface circuit 6202 may read data stored in memory 6203 and send the data to processor 6201.

[0465] In some embodiments, the interface circuit 6202 performs at least one of the communication steps (e.g., steps S2101, S2201, S2202, S2301, S2401, and S2402) of the aforementioned method. The interface circuit 6202 performing the communication steps (e.g., steps S2101, S2201, S2202, S2301, S2401, and S2402) of the aforementioned method, for example, means that the interface circuit 6202 performs data exchange between the processor 6201, the chip 6200, the memory 6203, or the transceiver device. In some embodiments, the processor 6201 performs at least one of the other steps (e.g., steps S2102, S2103, S2203, S2302, S2303, and S2403, but not limited thereto).

[0466] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0467] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 6100, the communication device 6100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a transient storage medium.

[0468] The present disclosure also provides a program product, which, when executed by the communication device 6100, enables the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0469] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

[0470] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A packet loss handling method, characterized in that, The method is executed by a first node and includes: Performing packet data unit (PDU) loss handling based on first information, where the first information is information related to packet set importance (PSI).

2. The method according to claim 1, characterized in that, The first information includes at least one of the following: First indication information, which is used to indicate whether to perform the PDU loss handling according to PSI; A loss timer, which is used to indicate the duration of performing the PDU loss handling according to PSI; Second indication information, which is used to indicate at least one PSI level, and the at least one PSI level is used to determine the PSI level range corresponding to the loss timer.

3. The method according to claim 2, wherein The performing packet data unit (PDU) loss handling based on the first information includes: When the first indication information is used to indicate performing the PDU loss handling according to PSI, and a first PDU has not been successfully transmitted before the loss timer times out, and the first PSI level corresponding to the first PDU is within the PSI level range indicated by the second indication information, discard the first PDU.

4. The method according to claim 2, characterized in that, The method further includes: Receiving PDU set quality of service (QoS) parameters sent by a second node; Determining the first information based on the PDU set QoS parameters.

5. The method according to claim 4, wherein The determining the first information based on the PDU set QoS parameters includes at least one of the following: When the first node supports processing of a PDU set, determining the first indication information; The PDU set QoS parameters include a PDU set delay budget (PSDB), and determining information about the loss timer based on the PSDB; Determining the at least one PSI level indicated by the second indication information based on the PSI information included in the PDU set QoS parameters.

6. The method according to claim 2, characterized in that, The method further includes: Receiving a first message sent by the second node, where the first message includes the first information.

7. The method according to claim 6, wherein The first node is the user plane gNB-CU-UP of the central unit of a network device, the second node is the control plane gNB-CU-CP of the central unit of the network device, and the first message is a first E1AP message; or The first node is the distributed unit gNB-DU of the network device, the second node is gNB-CU-CP, and the first message is a first F1AP message.

8. The method according to claim 7, wherein The first E1AP message is at least one of the following: A bearer context establishment request message; A bearer context modification request message; A bearer context modification confirmation message.

9. The method according to claim 7, wherein The first F1AP message is at least one of the following: A terminal context establishment request message; A terminal context modification request message; A terminal context modification confirmation message.

10. The method according to any one of claims 6-9, characterized in that, The method further includes: Sending a second message to the second node, where the second message includes second information, and the second information is used to determine the first information.

11. The method according to claim 10, wherein The second information includes at least one of the following: Request indication information, which is used to request performing the PDU loss handling according to PSI; Wireless data bearer DRB identification information, where the DRB identification information is used to identify the DRB that needs to perform PDU packet loss handling according to the PSI.

12. The method according to claim 10 or 11, characterized in that The first node is gNB-CU-UP, the second node is gNB-CU-CP, and the second message is the second E1AP message; or The first node is gNB-DU, the second node is gNB-CU-CP, and the second message is the second F1AP message.

13. The method according to claim 12, characterized in that, The second E1AP message is: Bearer context modification requirement message.

14. The method according to claim 12, wherein The second F1AP message is: Terminal context modification requirement message.

15. A method for handling packet loss, characterized in that, The method is executed by the second node and includes: Sending first information to the first node, where the first information is information related to the Packet Data Unit (PDU) set importance (PSI), and the first information is used for the first node to perform PDU packet loss handling; or Sending PDU set Quality of Service (QoS) parameters to the first node, where the PDU set QoS parameters are used to determine the first information, the first information is information related to the Packet Data Unit (PDU) set importance (PSI), and the first information is used for the first node to perform PDU packet loss handling.

16. The method according to claim 15, wherein The first information includes at least one of the following: First indication information, which is used to indicate whether to perform PDU packet loss handling according to the PSI; Packet loss timer, which is used to indicate the duration of performing PDU packet loss handling according to the PSI; Second indication information, which is used to indicate at least one PSI level, and the at least one PSI level is used to determine the PSI level range corresponding to the packet loss timer.

17. The method according to claim 15 or 16, characterized in that, The sending the first information to the first node includes: Sending a first message to the first node, where the first message includes the first information.

18. The method according to claim 17, characterized in that The first node is the user plane gNB-CU-UP of the central unit of the network device, the second node is the control plane gNB-CU-CP of the central unit of the network device, and the first message is the first E1AP message; or The first node is the distributed unit gNB-DU of the network device, the second node is gNB-CU-CP, and the first message is the first F1AP message.

19. The method according to claim 18, wherein The first E1AP message is at least one of the following: Bearer context establishment request message; Bearer context modification request message; Bearer context modification confirmation message.

20. The method according to claim 18, wherein The first F1AP message is at least one of the following: Terminal context establishment request message; Terminal context modification request message; Terminal context modification confirmation message.

21. The method according to any one of claims 15 - 20, characterized in that, The method further includes: Receiving a second message sent by the first node, where the second message includes second information; Determining the first information based on the second information.

22. The method according to claim 21, wherein The second information includes at least one of the following: Request indication information, which is used to request to perform PDU packet loss handling according to the PSI; Radio data bearer DRB identification information, where the DRB identification information is used to identify the DRB for which the PDU packet loss handling needs to be performed according to the PSI.

23. The method according to claim 21 or 22, characterized in that the first node is a gNB-CU-UP, the second node is a gNB-CU-CP, and the second message is a second E1AP message; or the first node is a gNB-DU, the second node is a gNB-CU-CP, and the second message is a second F1AP message.

24. The method according to claim 23, wherein The second E1AP message is: Bearer context modification requirement message.

25. The method according to claim 23, characterized in that The second F1AP message is: Terminal context modification requirement message.

26. A first node, characterized in that, Comprising: A processing module, configured to perform packet data unit PDU packet loss handling based on first information, where the first information is information related to the packet data unit PDU set importance PSI.

27. A second node, characterized in that, Comprising: A transceiver module, configured to send first information to a first node, where the first information is information related to the packet data unit PDU set importance PSI, and the first information is used for the first node to perform PDU packet loss handling; or Send PDU set quality of service QoS parameters to the first node, where the PDU set QoS parameters are used to determine the first information, the first information is information related to the packet data unit PDU set importance PSI, and the first information is used for the first node to perform PDU packet loss handling.

28. A first node, characterized in that, Comprising: One or more processors; wherein, the processor is used to execute the packet loss handling method according to any one of claims 1-14.

29. A second node, characterized in that, Comprising: One or more processors; wherein, the processor is used to execute the packet loss handling method according to any one of claims 15-25.

30. A communication system, characterized in that, Comprising a first node and a second node, wherein the first node is configured to implement the packet loss handling method according to any one of claims 1-14, and the second node is configured to implement the packet loss handling method according to any one of claims 15-25.

31. A storage medium, the storage medium stores instructions, characterized in that, When the instruction runs on a communication device, it causes the communication device to execute the packet loss handling method according to any one of claims 1-14 or 15-25.

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