CN115696436A

CN115696436A - Node in wireless communication system and method for performing the same

Info

Publication number: CN115696436A
Application number: CN202110949145.6A
Authority: CN
Inventors: 王妍茹; 王弘; 许丽香; 汪巍崴
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2021-07-21
Filing date: 2021-08-18
Publication date: 2023-02-03

Abstract

The present disclosure provides a first node in a wireless communication system and a method performed by the first node, including: receiving first information from a second node in the wireless communication system; and in response to receiving the first information, determining an interface delay of a general packet radio service tunneling protocol user plane (GTP-U) packet between a GTP-U packet sending node and a GTP-U packet receiving node.

Description

Node in wireless communication system and method for performing the same

Technical Field

The present disclosure relates generally to the field of wireless communications, and more particularly, to a node in a wireless communication system and a method performed thereby.

Background

In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Accordingly, the 5G or quasi-5G communication system is also referred to as a "super 4G network" or a "post-LTE system".

Wireless communication is one of the most successful innovations in modern history. Recently, the number of subscribers of wireless communication services exceeds 50 billion, and is still rapidly increasing. Due to the increasing popularity of smart phones and other mobile data devices (e.g., tablet computers, notebook computers, netbooks, e-book readers, and machine type devices) among consumers and businesses, the demand for wireless data services is growing rapidly. To meet the high-speed growth of mobile data services and support new applications and deployments, it is important to improve radio interface efficiency and coverage.

Disclosure of Invention

According to an aspect of the present disclosure, there is provided a method performed by a first node in a wireless communication system, comprising: receiving first information from a second node in the wireless communication system; and in response to receiving the first information, determining an interface delay of a general packet radio service tunneling protocol user plane (GTP-U) packet between a GTP-U packet sending node and a GTP-U packet receiving node.

According to another aspect of the present disclosure, there is provided a method performed by a second node in a wireless communication system, comprising: sending first information to a first node; and wherein the first information is used by the first node to determine an interface delay of a general packet radio service tunneling protocol user plane, GTP-U, packet between the GTP-U packet sending node and the GTP-U packet receiving node.

According to yet another aspect of the present disclosure, there is provided a node in a wireless communication network, comprising: a transceiver configured to transmit and receive a signal; and a controller configured to control the transceiver to perform various methods provided by the present disclosure.

Drawings

The above and other aspects, features and advantages of certain embodiments of the disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings in which:

fig. 1 illustrates an exemplary system architecture for System Architecture Evolution (SAE) in accordance with embodiments of the disclosure;

FIG. 2 illustrates an exemplary system architecture according to an embodiment of the present disclosure;

FIG. 3 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

FIG. 4 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

FIG. 5 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

FIG. 5A illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

FIG. 6 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

FIG. 7 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure;

fig. 8 illustrates a method performed by a first node in a wireless communication system according to an embodiment of the disclosure;

fig. 9 illustrates a first node in a wireless communication system according to an embodiment of the disclosure;

fig. 10 illustrates a method performed by a second node in a wireless communication system according to an embodiment of the disclosure;

fig. 11 shows a second node in a wireless communication system according to an embodiment of the disclosure.

Detailed Description

Figures 1 through 11, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device.

Fig. 1 is an exemplary system architecture 100 for System Architecture Evolution (SAE). A User Equipment (UE) 101 is a terminal device for receiving data. An evolved universal terrestrial radio access network (E-UTRAN) 102 is a radio access network that includes macro base stations (eNodeB/NodeB) that provide access to a radio network interface for UEs. Mobility Management Entity (MME) 103 is responsible for managing mobility context, session context, and security information for the UE. Serving Gateway (SGW) 104 mainly provides the functions of the user plane, and MME103 and SGW 104 may be in the same physical entity. A packet data network gateway (PGW) 105 is responsible for charging, lawful interception, etc., and may also be in the same physical entity as the SGW 104. A Policy and Charging Rules Function (PCRF) 106 provides quality of service (QoS) policies and charging criteria. The general packet radio service support node (SGSN) 108 is a network node device in the Universal Mobile Telecommunications System (UMTS) that provides routing for the transmission of data. The Home Subscriber Server (HSS) 109 is the home subsystem of the UE and is responsible for protecting user information including the current location of the user equipment, the address of the serving node, user security information, the packet data context of the user equipment, etc.

Fig. 2 is an exemplary system architecture 200 in accordance with various embodiments of the present disclosure. Other embodiments of the system architecture 200 can be used without departing from the scope of this disclosure.

A User Equipment (UE) 201 is a terminal device used to receive data. The next generation radio access network (NG-RAN) 202 is a radio access network comprising base stations (gbb or eNB connected to the 5G core network 5GC, also called NG-gbb) providing access to radio network interfaces for UEs. An access control and mobility management function (AMF) 203 is responsible for managing the mobility context of the UE, and security information. A user plane function entity (UPF) 204 mainly provides functions of the user plane. The session management function entity SMF205 is responsible for session management. The Data Network (DN) 206 contains services such as the operator, access to the internet, and third party services.

A method for two nodes (e.g., a first node and a second node) to determine an interface delay between a GTP-U packet transmitting node and a GTP-U packet receiving node is described below in conjunction with fig. 3 through 11. For example, the first node may be a gNB central unit user plane (gNB-CU-UP), and the second node may be a gNB distribution unit (gNB-DU); the first node may be a gNB central unit control plane (gNB-CU-CP), and the second node may be a gNB-DU; the first node may be a User Plane Function (UPF) and the second node may be a next generation node B (gNB) or gNB CU-UP or en-gNB or evolved node B (eNB) or ng-eNB; the first node may be a gNB-CU-UP and the second node may be a gNB-CU-CP. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes. Taking the gNB CU-UP and the gNB DU as examples of the first and second nodes, if the gNB CU-UP sends GTP packets to the gNB DU, the interface latency is F1-U latency. The determination method of the F1-U time delay may be, for example: and subtracting the time of sending the GTP packet by the gNB CU-UP from the time of receiving the GTP packet sending state information from the gNB DU by the gNB CU-UP, subtracting the feedback time delay of the gNB DU, and dividing the obtained time delay by 2 to obtain the F1-U time delay. However, this is merely an example, and the determination method of the F1-U delay is not limited thereto.

EN-gNB in this disclosure is a node that provides an end point to the NR user plane and control plane of the UE and acts as a secondary node in evolved universal terrestrial radio access new radio Dual Connectivity (E-UTRA-NR Dual Connectivity EN-DC); the NG-eNB is a node that provides an evolved universal terrestrial radio access user plane and control plane terminating towards the UE and connects to the 5G core network over the NG interface.

The present disclosure describes a method of supporting latency measurement by the following example one to example seven. Each of example one to example seven may be implemented separately. Alternatively, a portion of one example may be implemented separately. Or a portion or all of one example may be implemented in combination with a portion or all of another one or more examples.

The determination in this disclosure may be an acquisition, measurement, calculation, or the like.

Example one:

the first node sends a General Packet Radio Service tunneling Protocol User Plane (GTP-U) Packet to the second node, and the second node sends a first New Radio User Plane Protocol (NR-U) INFORMATION frame or a first message containing a time stamp-related parameter of the GTP-U Packet at a GTP-U Packet receiving node (e.g., the second node) after receiving the GTP-U Packet, so that the first node determines a feedback delay of the GTP-U Packet at the GTP-U Packet receiving node (e.g., the second node) and determines a transmission delay of the GTP-U Packet (e.g., F1-U) at an interface (e.g., F1-U). The first NR-U INFORMATION frame may be an auxiliary INFORMATION DATA (idle INFORMATION) frame or a downlink DATA transmission state (DL station) frame or a first defined DATA frame or a second defined INFORMATION frame, or a second defined frame of the first or multiple INFORMATION messages, wherein the first defined frame or multiple INFORMATION frames may include one or more of the following:

the time point of receipt of the GTP-U packet: for indicating a receiving time point of a GTP-U packet at a GTP-U packet receiving node (e.g. the second node), the receiving time point may be a relative time point or an absolute time point. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

The NR-U information frame or first message at the transmission time point of the GTP-U packet receiving node: for indicating a point in time when the first NR-U information frame or the first message is transmitted at a GTP-U packet receiving node (e.g., the second node). The transmission time point may be a relative time point or an absolute time point.

The first node receives a first NR-U information frame or a first message containing a timestamp related parameter of a GTP-U packet at a GTP-U packet receiving node (e.g., a second node), and the first node may perform the determination of the interface delay according to the following method:

the first method: GTP-U packet receiving node feedback delay of GTP-U packet = NR-U information frame or first message transmission time point of GTP-U packet receiving node (e.g. second node) -receiving time point of GTP-U packet

Therefore, after the first node obtains the feedback delay of the GTP-U packet receiving node (e.g., the second node) according to the above method, the first node may determine the interface delay according to the following method:

method A: interface delay = (first NR-U information frame or first message at GTP-U packet sending node's (e.g., first node's) reception time point-GTP-U packet sending time point-GTP-U packet receiving node's GTP-U packet feedback delay)/2.

If the first node and the second node are time synchronized, the first node may determine the interface delay according to one or more of the following methods:

method B: interface latency = reception time point of first NR-U information frame at GTP-U packet transmitting node (e.g., first node) — transmission time point of first NR-U information frame at GTP-U packet receiving node (e.g., second node)

Method C: interface latency = GTP-U packet reception time point at a GTP-U packet receiving node (e.g., the second node) -GTP-U packet transmission time point at a GTP-U packet transmitting node (e.g., the first node).

Example two:

the first node sends a GTP-U packet to the second node, and after receiving the GTP-U packet, the second node sends a second NR-U information frame or a second message containing the feedback delay related parameters of the GTP-U packet at a GTP-U packet receiving node (for example, the second node) to the first node, so that the first node obtains the feedback delay of the GTP-U packet at the GTP-U packet receiving node (for example, the second node), and further determines the transmission delay of the GTP-U packet on an interface (for example, F1-U). The second NR-U INFORMATION frame may be auxiliary INFORMATION DATA (association INFORMATION DATA), a downlink DATA transmission STATUS (DL DATA delay STATUS), or a newly defined INFORMATION frame. The second message may be a message of F1 or NG or E1 or Xn or X2. The second NR-U information frame or second message includes one or more of:

GTP-U packet feedback latency: for indicating a feedback delay of the GTP-U packet at a GTP-U packet receiving node (e.g., the second node). The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

Feedback delay of GTP-U packet receiving node: for indicating an average feedback delay at a GTP-U packet receiving node (e.g., the second node) for the GTP-U packet over a period of time. The period of time may be determined by the implementation of the GTP-U packet receiving node (e.g., the second node), or by a related configuration of the first node.

Feedback delay of unreransmitted packets of GTP-U packet receiving node: for indicating an average feedback delay at a GTP-U packet receiving node (e.g., the second node) for the non-retransmitted GTP-U packet over a period of time. The period of time may be determined by the implementation of the GTP-U packet receiving node (e.g., the second node), or by a related configuration of the first node.

GTP-U packet retransmission indication: for indicating whether the GTP-U packet is retransmitted at the GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is retransmitted, when the bit is 0, it indicates that the GTP-U packet is not retransmitted, or when the bit is 0, it indicates that the GTP-U packet is retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet Radio Link Control (RLC)) retransmission indication: for indicating whether the GTP-U packet is subject to RLC retransmission at the GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is retransmitted by RLC, when the bit is 0, it indicates that the GTP-U packet is not retransmitted by RLC, or when the bit is 0, it indicates that the GTP-U packet is retransmitted by RLC, and when the bit is 1, it indicates that the GTP-U packet is not retransmitted by RLC. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NRPDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet Hybrid Automatic Repeat request (HARQ)) retransmission indication: for indicating whether the GTP-U packet is subject to HARQ retransmission at the GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is HARQ retransmitted, when the bit is 0, it indicates that the GTP-U packet is not HARQ retransmitted, or when the bit is 0, it indicates that the GTP-U packet is HARQ retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not HARQ retransmitted. The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NRPDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel data units) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the PDCP-U packets. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

The first node receives a second NR-U information frame or a second message containing a feedback delay related parameter of a GTP-U packet at a GTP-U packet receiving node (e.g., the second node), and the first node may determine or obtain the feedback delay of the GTP-U packet at the GTP-U packet receiving node according to one or more of the following methods:

a second method: the feedback time delay of a GTP-U packet receiving node GTP-U packet = GTP-U packet feedback time delay

The third method: feedback time delay of GTP-U packet receiving node GTP-U packet = feedback time delay of GTP-U packet receiving node

Method four: GTP-U packet receiving node feedback delay for GTP-U packet = GTP-U packet receiving node feedback delay for unreransmission packets

Method five: when GTP-U packet retransmission indicates no retransmission (including no RLC retransmission and/or no HARQ retransmission), the feedback delay of GTP-U packet receiving node GTP-U packet = feedback delay of non-retransmitted packet of GTP-U packet receiving node

method A: interface delay = (second NR-U information frame at GTP-U packet sending node (e.g., first node) receiving time point-GTP-U packet sending time point-GTP-U packet receiving node GTP-U packet feedback delay)/2.

Example three:

the first node sends a GTP-U packet to the second node, and after receiving the GTP-U packet, the second node sends a third NR-U information frame or a third message containing the feedback delay related parameters of the GTP-U packet at a GTP-U packet receiving node (for example, the second node) to the first node, so that the first node can determine the transmission delay of the GTP-U packet on an interface (such as F1-U). The first NR-U INFORMATION frame may be auxiliary INFORMATION DATA (association INFORMATION DATA), a downlink DATA transmission STATUS (DL DATA delay STATUS), or a newly defined INFORMATION frame. The third message may be a message of F1 or NG or E1 or Xn or X2. The third NR-U information frame or third message includes one or more of:

GTP-U packet retransmission indication: for indicating whether the GTP-U packet is subject to retransmission at a GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is retransmitted, when the bit is 0, it indicates that the GTP-U packet is not retransmitted, or when the bit is 0, it indicates that the GTP-U packet is retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the starting value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the ending value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs needing to report the delay parameter received by the receiving node, receiving one or more GTP-U packets indicated by one or more NRPDCP PDU SNs needing to report the delay parameter, and reporting and polling an NR-U information frame or a GTP-U packet in which the node is positioned. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet RLC retransmission indication: for indicating whether the GTP-U packet is subject to RLC retransmission at the GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is retransmitted by RLC, when the bit is 0, it indicates that the GTP-U packet is not retransmitted by RLC, or when the bit is 0, it indicates that the GTP-U packet is retransmitted by RLC, and when the bit is 1, it indicates that the GTP-U packet is not retransmitted by RLC. The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet HARQ retransmission indication: for indicating whether the GTP-U packet is HARQ retransmitted at the GTP-U packet receiving node (e.g., the second node). The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is HARQ retransmitted, when the bit is 0, it indicates that the GTP-U packet is not HARQ retransmitted, or when the bit is 0, it indicates that the GTP-U packet is HARQ retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not HARQ retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

Feedback delay of unreransmitted packets of GTP-U packet receiving node: for indicating the average feedback delay at the GTP-U packet receiving node for the non-retransmitted GTP-U packets over a period of time. The period of time may be determined by the implementation of the GTP-U packet receiving node (e.g., the second node), or by a related configuration of the first node.

GTP-U packet receiving node latency: a response (ACK) or a Negative response (NACK) for indicating that a GTP-U packet receiving node (e.g., the second node) receives a GTP-U packet, and an average inter-time for transmitting the third NR-U information frame or the third message. The ACK or NACK may be an RLC ACK or an RLC NACK, or an HARQ ACK or an HARQ NACK.

GTP-U packet latency: an interval between the transmission of the third NR-U information frame or the third message and the reception of the ACK or NACK of the GTP-U packet by a GTP packet receiving node (e.g., the second node) is indicated. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like. The ACK or NACK may be an RLC ACK or an RLC NACK, or an HARQ ACK or an HARQ NACK.

RLC retransmission times of GTP-U packets: for indicating the number of RLC retransmissions of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node). The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

Number of HARQ retransmissions for GTP-U packets: for indicating the number of HARQ retransmissions of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node) for a single RLC transmission. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the polling is positioned. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

Cumulative number of HARQ retransmissions for GTP-U packets: for indicating the cumulative number of HARQ retransmissions of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node) for all RLC transmissions. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

D1 latency: for indicating the statistical and/or determined D1 delay and/or the average D1 delay of a GTP-U packet receiving node, e.g. the second node. The D1 delay is a downlink delay in over-the-air interface.

D1 latency of GTP-U packet: for indicating the D1 delay of the GTP-U packet determined by the GTP-U packet receiving node (e.g., the second node). The D1 delay is a downlink delay in over-the-air interface. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs needing to report the delay parameter received by the receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs needing to report the delay parameter, and reporting and polling an NR-U information frame or a GTP-U packet where the polling is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

D2 latency: for indicating the D2 delay and/or the average D2 delay counted and/or determined by the GTP-U packet receiving node (e.g., the second node). The D2 delay is a downlink gNB DU delay (DL delay on gNB-DU).

D2 latency of GTP-U packet: for indicating the D2 delay of the GTP-U packet as determined by the GTP-U packet receiving node (e.g., the second node). The D2 delay is a downlink gNB DU delay (DL delay on gNB-DU). The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the starting value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the ending value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs needing to report the delay parameter received by the receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs needing to report the delay parameter, and reporting and polling an NR-U information frame or a GTP-U packet where the polling is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

The first node receives a third NR-U information frame or a third message containing the feedback delay related parameter of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node), and the first node may perform the determination or the acquisition of the feedback delay of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node) according to one or more of the following methods:

method six: the feedback time Delay of a GTP-U packet receiving node GTP-U packet = downlink DU time Delay Result (DL Delay DU Result) + GTP-U packet receiving node waiting time

Method seven: when the GTP-U packet retransmission indication is not retransmitted (including not being retransmitted by RLC and/or not retransmitted by HARQ), the feedback Delay of the GTP-U packet receiving node = the downlink DU Delay Result (DL Delay DU Result) + the waiting time of the GTP-U packet receiving node

Method eight: the feedback time Delay of a GTP-U packet receiving node GTP-U packet = downlink DU time Delay Result (DL Delay DU Result) + GTP-U packet waiting time

Method nine: when the GTP-U packet retransmission indication is not retransmitted (including not being retransmitted by RLC and/or not being retransmitted by HARQ), the feedback Delay of the GTP-U packet receiving node GTP-U packet = the downlink DU Delay Result (DL Delay DU Result) + the waiting time of the GTP-U packet

Method ten: the feedback delay of a GTP-U packet receiving node GTP-U packet = the RLC retransmission times of the GTP-U packet + the D2 time delay of the GTP-U packet + (the RLC retransmission times of the GTP-U packet + the HARQ retransmission times of the GTP-U packet 1+ the HARQ retransmission times of the GTP-U packet 2 \8230;) the D1 time delay of the GTP-U packet + the feedback delay of the unreturned packet of the GTP-U packet receiving node

Method eleven: the feedback time delay of GTP-U packet receiving nodes GTP-U packet = RLC retransmission times of GTP-U packet + D2 time delay + (RLC retransmission times of GTP-U packet + HARQ retransmission times of GTP-U packet 1+ HARQ retransmission times of GTP-U packet 2 \ 8230;) D1 time delay + feedback time delay of non-retransmitted packet of GTP-U packet receiving nodes

Method twelve: the feedback time delay of a GTP-U packet receiving node GTP-U packet = the number of RLC retransmissions of the GTP-U packet + the D2 time delay of the GTP-U packet + (the number of RLC retransmissions of the GTP-U packet + the cumulative number of HARQ retransmissions of the GTP-U packet) × the D1 time delay of the GTP-U packet + the feedback time delay of the unremitted packet of the GTP-U packet receiving node

Method thirteen: feedback time delay of GTP-U packet receiving node GTP-U packet = RLC retransmission times of GTP-U packet as D2 time delay + (RLC retransmission times of GTP-U packet + accumulated HARQ retransmission times of GTP-U packet) × D1 time delay + feedback time delay of unreturned packet of GTP-U packet receiving node

Fourteen methods: feedback time delay of GTP-U packet receiving node GTP-U packet = (1 + GTP-U packet RLC retransmission times) & gt D2 time delay of GTP-U packet + (1 + GTP-U packet RLC retransmission times + GTP-U packet HARQ retransmission times 1 & lt +GTP-U packet HARQ retransmission times & lt 2 & gt 8230 & gt) & gt GTP-U packet D1 time delay + GTP-U packet waiting time or GTP-U packet receiving node waiting time

Method fifteen: feedback time delay of GTP-U packet receiving node GTP-U packet = (RLC retransmission times of 1+ GTP-U packet) } D2 time delay + (RLC retransmission times of 1+ GTP-U packet + HARQ retransmission times of 1+ GTP-U packet 2 \8230 +) (D1 time delay + GTP-U packet waiting time or GTP-U packet receiving node waiting time

The method sixteen: feedback time delay of GTP-U packet receiving node GTP-U packet = (1 + GTP-U packet RLC retransmission times) & GTP-U packet D2 time delay + (1 + GTP-U packet RLC retransmission times + GTP-U packet accumulated HARQ retransmission times) & GTP-U packet D1 time delay + GTP-U packet waiting time or GTP-U packet receiving node waiting time

Seventeen methods: feedback time delay of GTP-U packet receiving node GTP-U packet = (1 + GTP-U packet RLC retransmission times) × D2 time delay + (1 + GTP-U packet RLC retransmission times + GTP-U packet accumulated HARQ retransmission times) × D1 time delay + GTP-U packet waiting time or GTP-U packet receiving node waiting time

Eighteen methods: when GTP-U packet is retransmitted through RLC but not retransmitted by HARQ, the feedback time delay of GTP-U packet at GTP-U packet receiving node = (RLC retransmission times of 1+ GTP-U packet) = feedback time delay of GTP-U packet receiving node

Method nineteen: when GTP-U packet is retransmitted through RLC but not retransmitted by HARQ, the feedback time delay of GTP-U packet at GTP-U packet receiving node = (RLC retransmission times of 1+ GTP-U packet) = feedback time delay of non-retransmitted packet at GTP-U packet receiving node

The method twenty: when GTP-U packet is retransmitted through RLC but not retransmitted through HARQ, the feedback time Delay of GTP-U packet receiving node GTP-U packet = (RLC retransmission times of 1+ GTP-U packet) = (DL Delay DU Result) + GTP-U packet receiving node waiting time

Twenty-one methods: when a GTP-U packet is retransmitted through RLC but not retransmitted through HARQ, the feedback time Delay of the GTP-U packet receiving node GTP-U packet = (RLC retransmission times of 1+ GTP-U packet) = (DL Delay DU Result) + GTP-U packet waiting time)

method A: interface delay = (third NR-U information frame at GTP-U packet sending node (e.g., first node) receiving time point-GTP-U packet sending time point-GTP-U packet receiving node GTP-U packet feedback delay)/2.

Example four:

the first node sends a GTP-U packet to the second node, and the second node sends a fourth NR-U information frame or a fourth message containing interface delay related parameters to the first node after receiving the GTP-U packet, so that the first node can acquire the transmission delay or the measurement delay of the interface delay (such as F1-U) of the GTP-U packet between the first node and the second node. The fourth NR-U INFORMATION frame may be auxiliary INFORMATION DATA (association INFORMATION DATA), a downlink DATA transmission STATUS (DL DATA delay STATUS), or a newly defined INFORMATION frame. The fourth message may be a message of F1 or NG or E1 or Xn or X2. The fourth NR-U information frame or fourth message comprises one or more of:

d3 latency: for indicating the statistical and/or determined D3 delay or the average D3 delay of a GTP-U packet receiving node, e.g. the second node. The D3 time delay is a downlink F1-U time delay (DL delay on F1-U).

D3 latency of GTP-U packet: for indicating the D3 delay of the GTP-U packet as determined by the GTP-U packet receiving node (e.g., the second node). The D3 time delay is a downlink F1-U time delay (DLdelay on F1-U). The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

Inter-node interface latency: for indicating the counted and/or determined interface delay between nodes and/or the average interface delay. The interface latency may be a latency of F1 and/or E1 and/or Xn and/or X2 and/or NG.

Measurement delay: for indicating the measured time delay. The measured delay may comprise one or more of:

o delay type: indicating the type of delay. The latency type may include one or more of: d1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP), D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average delay UL on F1-U), and D2.4 Average PDCP delay (Average PDCP-reordering). The uplink delay time delay comprises D1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP) belonging to downlink delay time, D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average UL on F1-U), and D2.4 Average PDCP reordering delay (Average PDCP reordering-interference delay) belonging to uplink delay time.

o measurement results: for indicating the delay result of the measurement.

Therefore, the first node can obtain the interface delay as follows:

method D: interface latency = D3 latency

Method E: interface latency = D3 latency of GTP-U packets

Method F: interface delay = interface delay between nodes

Example five:

the first node sends a GTP-U packet carrying the sending time in a fifth NR-U information frame to the second node, the second node sends a fourth NR-U information frame or a fourth message containing the parameters related to the delay of the GTP-U packet at the interface to the first node after receiving the GTP-U packet, so that the first node obtains the transmission delay of the GTP-U packet at the interface (such as F1-U), or sends the first NR-U information frame or the first message containing the timestamp and/or the feedback delay related parameters of the GTP-U packet at a GTP-U packet receiving node (such as the second node) and/or the second NR-U information frame or the second message and/or the third NR-U information frame or the third message after receiving the GTP-U packet to the first node, so that the first node obtains or determines the feedback of the GTP-U packet at the GTP-U packet receiving node (such as the second node), and then determines the transmission delay of the GTP-U packet at the interface (such as F1-U packet) at the first node. The fifth NR-U information frame may be downlink USER DATA (DL USER DATA). The fifth NR-U information frame includes one or more of:

transmission time point of GTP-U packet: for indicating a transmission time point of the GTP-U packet at a GTP-U packet transmitting node (e.g., the first node), which may be a relative time point or an absolute time point.

If the first node and the second node are time synchronized, the second node may determine the interface delay according to the following method:

method C: interface latency = GTP-U packet reception time point at GTP-U packet receiving node-GTP-U packet transmission time point at GTP-U packet transmitting node (e.g. first node).

The first node may also obtain or determine the feedback delay of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node) according to the methods one to twenty one described above, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F described above.

Example six:

and the first node sends a GTP-U packet carrying the delay feedback requirement or a sixth message carrying the delay feedback requirement in a sixth NR-U information frame to the second node so that the second node can know the relevant requirement of the delay needing to be fed back. And after receiving the GTP-U packet or the sixth message containing the sixth NR-U information frame, the second node sends the information frame or the message containing the relevant time delay parameter to the first node according to the feedback requirement. For example, after receiving the GTP-U packet, the second node sends the fourth NR-U information frame or the fourth message including the parameters related to the GTP-U packet delay at the GTP-U packet receiving node interface, so that the first node obtains the transmission delay of the GTP-U packet (e.g., F1-U) on the interface, or after receiving the GTP-U packet, the second node sends the first NR-U information frame or the first message, and/or the second NR-U information frame or the second message, and/or the third NR-U information frame or the third message including the timestamp and/or the feedback delay related parameters of the GTP-U packet at the GTP-U packet receiving node to the first node, so that the first node obtains or determines the feedback delay of the GTP-U packet at the GTP-U packet receiving node, and then the first node determines the transmission delay of the GTP-U packet (e.g., F1-U) on the interface. The sixth NR-U information frame may be downlink USER DATA (DL USER DATA). The sixth message may be a message of F1 or NG or E1 or Xn or X2. The sixth NR-U information frame or sixth message includes one or more of:

feedback latency report polling: and the method is used for indicating whether the feedback time delay related parameters need to be reported or not. The field may be represented by 1 bit, for example, when the bit is 1, the feedback delay related parameter needs to be reported, when the bit is 0, the feedback delay related parameter does not need to be reported, or when the bit is 0, the feedback delay related parameter needs to be reported, and when the bit is 1, the feedback delay related parameter does not need to be reported. The feedback delay related parameter comprises one or more of the following: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; the first information is at the receiving time point of a GTP-U packet sending node; a sending time point of a GTP-U packet; GTP-U packet feedback time delay; the feedback time delay of a GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; a GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission instruction; a GTP-U packet hybrid automatic repeat request HARQ retransmission indication; waiting time of a GTP-U packet receiving node; GTP-U packet latency; RLC retransmission times of GTP-U packets; HARQ retransmission times of a GTP-U packet; accumulated HARQ retransmission times of the GTP-U packet; d3, delaying time; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring the time delay.

DU feedback latency report polling: and is used for indicating whether the parameters related to the feedback delay time of the DU need to be reported or not. This field may be represented by 1 bit, for example, when the bit is 1, the DU feedback delay related parameter needs to be reported, when the bit is 0, the DU feedback delay related parameter does not need to be reported, or when the bit is 0, the DU feedback delay related parameter needs to be reported, and when the bit is 1, the DU feedback delay related parameter does not need to be reported. The feedback delay related parameter comprises one or more of the following: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; the first information is at the receiving time point of a GTP-U packet sending node; a sending time point of a GTP-U packet; GTP-U packet feedback time delay; the feedback time delay of a GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; a GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission instruction; a GTP-U packet hybrid automatic repeat request HARQ retransmission indication; waiting time of a GTP-U packet receiving node; GTP-U packet latency; RLC retransmission times of a GTP-U packet; HARQ retransmission times of a GTP-U packet; accumulated HARQ retransmission times of the GTP-U packet; d3, time delay; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring time delay.

F1-U measurement delay report polling: and the method is used for indicating whether the F1-U measurement time delay related parameters need to be reported. This field may be represented by 1 bit, for example, when the bit is 1, the F1-U measurement delay related parameter needs to be reported, and when the bit is 0, the F1-U measurement delay related parameter does not need to be reported, or when the bit is 0, the F1-U measurement delay related parameter needs to be reported, and when the bit is 1, the F1-U measurement delay related parameter does not need to be reported. The F1-U measurement delay related parameters comprise one or more of the following: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; the first information is at the receiving time point of a GTP-U packet sending node; a sending time point of a GTP-U packet; GTP-U packet feedback time delay; the feedback time delay of the GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; a GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission instruction; a GTP-U packet hybrid automatic repeat request HARQ retransmission indication; waiting time of a GTP-U packet receiving node; GTP-U packet latency; RLC retransmission times of GTP-U packets; HARQ retransmission times of a GTP-U packet; accumulated HARQ retransmission times of the GTP-U packet; d3, delaying time; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring the time delay.

Measurement delay report polling: and the method is used for indicating whether the measurement delay related parameters need to be reported. The field may be represented by 1 bit, for example, when the bit is 1, the measurement delay related parameter needs to be reported, when the bit is 0, the measurement delay related parameter does not need to be reported, or when the bit is 0, the measurement delay related parameter needs to be reported, and when the bit is 1, the measurement delay related parameter does not need to be reported. Measuring the delay related parameter comprises one or more of: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; the first information is at the receiving time point of a GTP-U packet sending node; a sending time point of a GTP-U packet; GTP-U packet feedback time delay; the feedback time delay of a GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission instruction; a GTP-U packet hybrid automatic repeat request HARQ retransmission indication; waiting time of a GTP-U packet receiving node; GTP-U packet latency; RLC retransmission times of a GTP-U packet; HARQ retransmission times of GTP-U packets; accumulated HARQ retransmission times of the GTP-U packet; d1, delaying time; d1 time delay of a GTP-U packet; d2, time delay; d2 time delay of a GTP-U packet; d3, delaying time; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring time delay.

NR PDCP SN with time delay parameters to be reported: for indicating the NR PDCP SNs to which one or more GTP-U packets for which delay parameters need to be measured and/or calculated belong. The NR PDCP SN of the delay parameter to be reported may be a single NR PDCP SN, and/or a plurality of NR PDCP SNs, and/or a list of NR PDCP SNs, and/or a start value of a NR PDCP SN, and/or an end value of a NR PDCP SN.

Time delay direction: the method is used for indicating the measurement direction of the time delay needing to be fed back, such as uplink time delay and downlink time delay.

The latency type: indicating the type of delay for which feedback is required. The latency type may include one or more of: d1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP), D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average delay UL on F1-U), and D2.4 Average PDCP delay (Average PDCP-reordering). The uplink delay time delay comprises D1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP) belonging to downlink delay time, D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average UL on F1-U), and D2.4 Average PDCP reordering delay (Average PDCP reordering-interference delay) belonging to uplink delay time.

The delay parameter type: for indicating the parameters that need to be fed back. The delay parameter type may comprise one or more of the parameters contained in the first NR-U information frame or first message, and/or the second NR-U information frame or second message, and/or the third NR-U information frame or third message, and/or the fourth NR-U information frame or fourth message, as described above.

Feedback granularity: and the granularity used for indicating the feedback parameters needed, such as UE level, DRB level, PDU Session level, statistical mean level, and the like.

Result reporting type: for indicating whether the delay measurement result is reported once or periodically. Reporting types include, but are not limited to: on-demand, periodic, etc.

Result reporting period: and the time interval is used for representing the periodic reporting of the time delay prediction result. If the field content is not available, the report is only needed for a single report.

Single or any combination of the above parameters may motivate the second node to report the delay parameter.

The first node may obtain or determine the feedback delay of the GTP-U packet at the GTP-U packet receiving node (e.g., the second node) according to the methods one to twenty one described above, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F described above.

The second node may be inspired and delay parameter reported as follows:

the method I comprises the following steps: when the report polling indication is that reporting is required, for example, in an implementation manner, the field is 1, and the second node reports the delay related parameter of the GTP-U packet according to the received reporting requirement. The report polling may be report polling indicating feedback delay time reporting, DU feedback delay time reporting, F1-U measurement delay related data reporting, downlink data transmission state reporting, auxiliary information data reporting, and the like. The GTP-U packet may be one or more of: reporting and polling the NR-U information frame or GTP-U packet in which the poll is located, the GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, the GTP-U packet indicated by the highest sent PDCP sequence number, the GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, the GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, the GTP-U packet indicated by the beginning value of the successfully transmitted disordered PDCP sequence number range, the GTP-U packet indicated by the ending value of the successfully transmitted disordered PDCP sequence number range, the GTP-U packet indicated by the downlink report NR PDCP PDUs (DL report NR PDCP PDUs) received by the receiving node, the GTP-U packet indicated by one or more NR PDCP PDUs requiring reporting of the delay parameter, and the GTP-U packet indicated by one or more PDCP PDUs.

The second method comprises the following steps: and when the NR PDCP SN needing to be reported exists and indicates the related GTP-U packet, the second node reports the time delay related parameters of the GTP-U packet according to the received reporting requirement. The NR PDCP SN to be reported may be the NR PDCP SN of the delay parameter to be reported, or may be a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN). The GTP-U packet can be a GTP-U packet indicated by the NR PDCP SN to be reported.

The third method comprises the following steps: when the report polling indication is that reporting is required, for example, in an implementation manner, the field is 1, and it is required to report that the NR PDCP SN exists and indicates a related GTP-U packet, the second node reports the delay related parameter of the GTP-U packet according to the received reporting requirement. The report polling may be report polling indicating feedback delay time reporting, DU feedback delay time reporting, F1-U measurement delay related data reporting, downlink data transmission state reporting, auxiliary information data reporting, or the like. The NR PDCP SN to be reported may be the NR PDCP SN of the delay parameter to be reported, or may be a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN). The GTP-U packet can be a GTP-U packet indicated by the NR PDCP SN to be reported.

The method four comprises the following steps: when the second node receives a QoS Monitoring Request (QoS Monitoring Request) indicating that QoS Monitoring is required, the second node reports a delay related parameter of a GTP-U packet according to the received reporting requirement. The GTP-U packet may be one or more of: the method comprises the steps of a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted disordered PDCP sequence number range, a GTP-U packet indicated by the ending value of the successfully transmitted disordered PDCP sequence number range, a GTP-U packet indicated by a downlink report PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, a GTP-U packet indicated by one or more NR PDCP PDUs received by the receiving node, a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node needing a delay parameter, and a GTP-U packet indicated by one or more NR PDCP PDUs.

The fifth mode is as follows: when the second node receives a QoS Monitoring Request (QoS Monitoring Request) indicating that QoS Monitoring is required and the report polling indication indicates that reporting is required, for example, in an implementation, the field is 1, and the second node reports the delay related parameter of the GTP-U packet according to the received reporting requirement. The report polling may be report polling indicating feedback delay time reporting, DU feedback delay time reporting, F1-U measurement delay related data reporting, downlink data transmission state reporting, auxiliary information data reporting, and the like. The GTP-U packet may be one or more of: the method comprises the steps of reporting an NR-U information frame or a GTP-U packet where polling is located, a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, a GTP-U packet indicated by the highest sent PDCP sequence number, a GTP-U packet indicated by a retransmitted PDCP sequence number, a GTP-U packet indicated by the beginning value of a disordered PDCP sequence number range successfully transmitted, a GTP-U packet indicated by the ending value of a disordered PDCP sequence number range successfully transmitted, a GTP-U packet indicated by a DL report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, a GTP-U packet indicated by one or more NR PDCP PDUs SN received by the receiving node, a GTP-U packet indicated by one or more NR PDCP PDUs requiring reporting delay parameters received by the receiving node, and a GTP-U packet indicated by one or more PDCP PDUs indicated by one or more NR PDUs.

Scheme six: when the second node receives a QoS Monitoring Request (QoS Monitoring Request) indicating that QoS Monitoring is required, and when the NR PDCP SN needs to be reported and a relevant GTP-U packet is indicated, the second node reports a delay-related parameter of the GTP-U packet according to the received reporting requirement. The NR PDCP SN to be reported may be the NR PDCP SN of the delay parameter to be reported, or may be a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN). The GTP-U packet can be a GTP-U packet indicated by the NR PDCP SN to be reported.

The scheme is seven: when the second node receives a QoS Monitoring Request (QoS Monitoring Request) indicating that QoS Monitoring is required and when the report polling indication indicates that reporting is required, for example, in an implementation, the field is 1, and when the NR PDCP SN is required to be reported and indicates a related GTP-U packet, the second node reports the delay related parameter of the GTP-U packet according to the received reporting requirement. The report polling may be report polling indicating feedback delay time reporting, DU feedback delay time reporting, F1-U measurement delay related data reporting, downlink data transmission state reporting, auxiliary information data reporting, and the like. The NR PDCP SNs to be reported may be the NR PDCP SNs whose delay parameters need to be reported, or a downlink reported NR PDCP PDU SN (DL report NR PDCP PDU SN). The GTP-U packet can be a GTP-U packet indicated by the NR PDCP SN to be reported.

The second node may be inspired by any one or any combination of the above methods to report the delay parameter.

Example seven:

and the first node receives a seventh NR-U information frame or a seventh message which is sent by the second node and contains the GTP-U packet feedback delay related parameters at the second node or other nodes, so that the first node can determine or acquire the transmission delay of the GTP-U packet on an interface (such as F1-U). The seventh NR-U INFORMATION frame may be auxiliary INFORMATION DATA (association INFORMATION DATA), a downlink DATA transmission STATUS (DL DATA delay STATUS), or a newly defined INFORMATION frame. The seventh message may be a gNB-CU-CP MEASUREMENT result INFORMATION (gNB-CU-CP MEASUREMENT INFORMATION) message of E1, or other E1 or F1 or NG or Xn or X2 message. The seventh NR-U information frame or seventh message comprises one or more of:

d3 latency: for indicating the counted and/or determined D3 delay and/or the average D3 delay. The D3 time delay is a downlink F1-U time delay (DL delay on F1-U).

D3 latency of GTP-U packet: for indicating the determined D3 delay of the GTP-U packet. The D3 time delay is a downlink F1-U time delay (DL delay on F1-U). The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

o delay type: indicating the type of delay. The latency type may include one or more of: d1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP), D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average UL on F1-U), and D2.4 Average PDCP-reordering delay (Average PDCP-ordering delay). The D1 downlink air interface delay (DL delay in over-the-air interface), D2 downlink gNB DU delay (DL delay on gNB-DU), D3 downlink F1-U delay (DL delay on F1-U), D4 downlink CU-UP delay (DL delay in CU-UP) belong to downlink delay, D1 uplink PDCP packet Average delay (UL PDCP packet Average delay), D2.1 Average air interface delay (Average over-the-air interface packet delay), D2.2 Average RLC packet delay (Average RLC packet delay), D2.3 Average uplink F1-U delay (Average UL delay on F1-U), and D2.4 Average PDCP delay (Average reordering delay) belong to uplink delay.

o measurement results: for indicating the measured delay results.

The time point of receipt of the GTP-U packet: for indicating a GTP-U packet reception time point at the GTP-U packet receiving node, which may be a relative time point or an absolute time point. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NRPDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

NR-U information frame or first message transmission time point: for indicating the point in time when the first NR-U information frame or the first message is sent at the GTP-U packet receiving node. The transmission time point may be a relative time point or an absolute time point.

GTP-U packet feedback latency: and the feedback time delay of the GTP-U packet at the GTP-U packet receiving node is indicated. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

Feedback delay of GTP-U packet receiving node: for indicating the average feedback delay at the GTP-U packet receiving node for a GTP-U packet over a period of time. The period of time may be determined by the implementation of the GTP-U packet receiving node or by the relevant configuration of the first node.

Feedback delay of unreransmitted packets of GTP-U packet receiving node: for indicating the average feedback delay at the GTP-U packet receiving node for the non-retransmitted GTP-U packet over a period of time. The period of time may be determined by the implementation of the GTP-U packet receiving node or by the first node's making relevant configurations.

GTP-U packet retransmission indication: for indicating whether the GTP-U packet is retransmitted at the GTP-U packet receiving node. The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is retransmitted, when the bit is 0, it indicates that the GTP-U packet is not retransmitted, or when the bit is 0, it indicates that the GTP-U packet is retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet RLC retransmission indication: for indicating whether the GTP-U packet is subject to RLC retransmission at the GTP-U packet receiving node. The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is RLC retransmitted, when the bit is 0, it indicates that the GTP-U packet is not RLC retransmitted, or when the bit is 0, it indicates that the GTP-U packet is RLC retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not RLC retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

GTP-U packet HARQ retransmission indication: for indicating whether the GTP-U packet is subjected to HARQ retransmission at the GTP-U packet receiving node. The indication may be indicated by 1 bit, for example, when the bit is 1, it indicates that the GTP-U packet is HARQ retransmitted, when the bit is 0, it indicates that the GTP-U packet is not HARQ retransmitted, or when the bit is 0, it indicates that the GTP-U packet is HARQ retransmitted, and when the bit is 1, it indicates that the GTP-U packet is not HARQ retransmitted. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

GTP-U packet receiving node latency: and the average interval time used for indicating the GTP-U packet receiving node to receive the ACK or NACK of the GTP-U packet and send the third NR-U information frame or the third message. The ACK or NACK may be an RLC ACK or an RLC NACK, or an HARQ ACK or an HARQ NACK.

GTP-U packet latency: and the interval time used for indicating the GTP-U packet receiving node to receive the ACK or NACK of the GTP-U packet and send the third NR-U information frame or the third message. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the starting value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the ending value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NRPDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like. The ACK or NACK may be an RLC ACK or an RLC NACK, or an HARQ ACK or an HARQ NACK.

RLC retransmission times of GTP-U packets: for indicating the number of RLC retransmissions of the GTP-U packet at the GTP-U packet receiving node. The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs (logical channel number) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, and polling and reporting NR-U packets or GTP information or GTP frames in which the receiving node. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

Number of HARQ retransmissions for GTP-U packet: for indicating the number of HARQ retransmissions of the GTP-U packet at the GTP-U packet receiving node for a single RLC transmission. The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, a GTP-U packet indicated by the sent highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the retransmitted PDCP sequence number, a start value of a successfully transmitted disordered PDCP sequence number range, a GTP-U packet indicated by a successfully transmitted disordered PDCP sequence number range, a downlink report PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, a GTP-U packet indicated by one or more PDCP NRPDU SNs received by the receiving node, a GTP-U packet indicated by one or more PDCP SNs requiring a time delay parameter, a GTP-U packet indicated by one or more NR PDCP PDUs, and polling the located NR-U information frame or the GTP-U packet. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

Cumulative number of HARQ retransmissions for GTP-U packets: for indicating the cumulative number of HARQ retransmissions of the GTP-U packet at the GTP-U packet receiving node for all RLC transmissions. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

D1 latency: for indicating the counted and/or determined D1 delays and/or the average D1 delay. The D1 delay is a downlink delay in over-the-air interface.

D1 latency of GTP-U packet: indicating the determined D1 delay of the GTP-U packet. The D1 delay is a downlink delay in over-the-air interface. The GTP-U packet may be one or more of: a GTP-U packet indicated by the successfully transmitted highest PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the successfully transmitted retransmitted PDCP sequence number, a GTP-U packet indicated by the start value of the successfully transmitted out-of-order PDCP sequence number range, a GTP-U packet indicated by the end value of the successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, receiving a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, receiving one or more GTP-U packets indicated by the NR PDCP PDU SNs requiring reporting of delay parameters received by the receiving node, receiving one or more GTP-U packets indicated by the one or more NR PDCP PDU SNs requiring reporting of delay parameters, and reporting and polling an NR-U information frame or a GTP-U packet in which the poll is located. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission state, reporting of auxiliary information data, and the like.

D2 latency: for indicating the counted and/or determined D2 delay and/or the average D2 delay. The D2 delay is a downlink gNB DU delay (DL delay on gNB-DU).

D2 latency of GTP-U packet: for indicating the determined D2 delay of the GTP-U packet. The D2 delay is a downlink gNB DU delay (DL delay on gNB-DU). The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by the retransmitted PDCP sequence number, sending a GTP-U packet indicated by the successfully transmitted disordered PDCP sequence number, sending a GTP-U packet indicated by the end value of the successfully transmitted disordered PDCP sequence number range, sending a GTP-U packet indicated by a downlink report NR PDCP PDU SN (DL report NR PDCP PDU SN) received by a receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDU SNs received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs, and polling and reporting NR information or GTP frames. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like.

Seventh NR-U information frame or seventh message at the receiving point in time of GTP-U packet sending node: the reception time point may be a relative time point or an absolute time point. The seventh NR-U information frame or the seventh message comprises this reception point in time if the first node is not the sending node of the GTP-U packet; the seventh NR-U information frame or the seventh message does not include this reception point in time if the first node is a transmitting node of a GTP-U packet.

Transmission time point of GTP-U packet: and the time point used for indicating the sending time point of the GTP-U packet at the GTP-U packet sending node can be a relative time point or an absolute time point. The GTP-U packet may be one or more of: the method comprises the steps of sending a GTP-U packet indicated by the highest successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a successfully transmitted retransmitted PDCP sequence number, sending a GTP-U packet indicated by a retransmitted PDCP sequence number, sending a retransmitted PDCP packet indicated by a successfully transmitted PDCP sequence number, sending a GTP-U packet indicated by a starting value of a successfully transmitted out-of-order PDCP sequence number range, sending a GTP-U packet indicated by an ending value of a successfully transmitted out-of-order PDCP sequence number range, receiving a GTP-U packet indicated by a downlink report NR PDCP PDU (DL report NR PDCP PDU SN) received by a receiving node, receiving one or more GTP-U packets indicated by NR PDCP PDUs SN(s) received by the receiving node, sending a GTP-U packet indicated by one or more NR PDCP PDUs reported by the receiving node, sending a GTP-U packet indicated by one or more NRPDCP PDUs reported by the one or more indicated by the NRPDCP PDU, and polling and reporting the NR-U packet or the information or the GTP frame. The report polling may be reporting of indication feedback delay time, reporting of DU feedback delay time, reporting of F1-U measurement delay related data, reporting of downlink data transmission status, reporting of auxiliary information data, and the like. The seventh NR-U information frame or the seventh message includes this transmission time point if the first node is not the transmission node of the GTP-U packet; the seventh NR-U information frame or the seventh message does not include this transmission point in time if the first node is a transmitting node of a GTP-U packet.

The first node may obtain or determine the feedback delay of the GTP-U packet at the GTP-U packet receiving node or other nodes according to the methods one to twenty one described above, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F described above.

Exemplary embodiments of the present disclosure are further described below in conjunction with the appended drawings.

The text and drawings are provided as examples only to aid in understanding the present disclosure. They should not be construed as limiting the scope of the disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on the disclosure herein, that changes can be made in the embodiments and examples shown without departing from the scope of the disclosure.

Fig. 3 illustrates a method of supporting latency measurements according to an embodiment of the disclosure. In particular, fig. 3 shows a process of interacting a timestamp and/or feedback delay related parameter of a second node between nodes to provide reference information to a first node for the first node to determine and/or obtain an interface delay between the first node and the second node. In one implementation, for example, the first node may be a gNB-CU-UP and the second node may be a gNB-DU; the first node may be a gNB-CU-CP and the second node may be a gNB-DU; the first node may be a UPF and the second node may be a gNB or a gNB CU-UP or an en-gNB or an eNB or an ng-eNB. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes.

Step 301: the first node sends a GTP-U packet to the second node.

Step 302: and the second node transmits the GTP-U packet with the UE after receiving the packet.

Step 303: after the second node obtains the transmission result, for example, the second node receives RLC ACK or NACK in the RLC AM mode, and receives HARQ ACK or NACK in the RLC UM mode, the second node sends information including a timestamp related parameter and/or a feedback delay related parameter of the GTP-U packet at the second node to the first node, so that the first node can determine the transmission delay of the GTP-U packet on the interface (for example, F1-U). In one implementation, for example, the information about the timestamp related parameter may be sent to the first node by the first NR-U information frame or the first message, and the information about the feedback delay related parameter may be sent to the first node by the second NR-U information frame or the second message or the third NR-U information frame or the third message.

Step 304: and the first node determines or acquires the feedback time delay of the second node and/or further determines or acquires the interface time delay based on the received information of the time stamp related parameter and/or the feedback time delay related parameter of the GTP-U at the second node. The determining method may obtain or determine the feedback delay of the GTP-U packet at the second node or other nodes according to the methods one to twenty one, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F. After the first node obtains the interface delay, the interface delay can be sent to other nodes according to requirements. For example, the first node may pass through the aforementioned seventh NR-U information frame or seventh message.

Fig. 4 illustrates a method of supporting latency measurements according to an embodiment of the disclosure. In particular, fig. 4 illustrates a process of interacting interface latencies between nodes to provide an interface latency between a first node and a second node to the first node. In one implementation, for example, the first node may be a gNB-CU-UP and the second node may be a gNB-DU; the first node may be a gNB-CU-CP and the second node may be a gNB-DU; the first node may be a UPF and the second node may be a gNB or a gNB CU-UP or an en-gNB or an eNB or a ng-eNB. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes.

Step 401: the first node sends a GTP-U packet carrying the sending time in the NR-U information frame to the second node. In one implementation, for example, the NR-U information frame may be the fifth NR-U information frame described previously.

Step 402: and after receiving the GTP-U packet, the second node determines the interface time delay between the first node and the second node. The determining mode can obtain or determine the interface delay of the GTP-U packet according to the method C.

Step 403: and the second node sends the determined interface delay to the first node. In one implementation, for example, the interface latency may be sent to the first node by the aforementioned fourth NR-U information frame or a fourth message.

Step 404: the first node obtains the interface delay. After the first node obtains the interface delay, the interface delay can be sent to other nodes according to requirements. For example, the first node may pass through the aforementioned seventh NR-U information frame or seventh message.

Fig. 5 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure. Specifically, fig. 5 shows a process of interacting a delay feedback requirement and a delay related parameter feedback between nodes, so that the second node provides the delay related parameter or the measured or determined delay to the first node according to the feedback requirement provided by the first node. In one implementation, for example, the first node may be a gNB-CU-UP and the second node may be a gNB-DU; the first node may be a gNB-CU-CP and the second node may be a gNB-DU; the first node may be a UPF and the second node may be a gNB or a gNB CU-UP or an en-gNB or an eNB or an ng-eNB. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes.

Step 501: the first node sends a delay measurement feedback requirement to the second node. In one implementation, for example, the NR-U information frame may be the aforementioned sixth NR-U information frame or sixth message.

Step 502: and after receiving the delay feedback requirement, the second node performs parameter collection or delay measurement according to the requirement, as described in reference to example six.

Step 503: the second node feeds back the delay result and/or the timestamp parameter of the second node and/or the feedback delay related parameter to the first node according to the feedback requirement received in step 501. In one implementation, for example, the delay result may be sent to the first node by the fourth NR-U information or a fourth message, the information about the timestamp-related parameter may be sent to the first node by the first NR-U information frame or a first message, and the information about the feedback delay-related parameter may be sent to the first node by the second NR-U information frame or a second message or a third NR-U information frame or a third message. And sending the determined interface delay to the first node.

Step 504: the first node may directly obtain the time delay, and/or determine or obtain the feedback time delay of the second node based on the received information of the timestamp related parameter and/or the feedback time delay related parameter at the second node, and/or further determine or obtain the interface time delay. The determining method may obtain or determine the feedback delay of the GTP-U packet at the second node or other nodes according to the methods one to twenty one, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F. After the first node obtains the interface delay, the interface delay can be sent to other nodes according to requirements. For example, the first node may pass through the aforementioned seventh NR-U information frame or seventh message.

Fig. 5A illustrates a method of supporting latency measurements according to an embodiment of the disclosure. Specifically, fig. 5A illustrates a process of gNB-CU-CP, gNB-CU-UP, gNB-DU interaction latency feedback requirement and latency related parameter feedback for the gNB-DU to provide the gNB-CU-UP with the gNB DU latency related parameters.

Step 501A: the gNB-CU-CP sends a QoS monitoring request to the gNB-DU.

Step 502A: and the gNB-CU-UP sends the delay measurement feedback requirement to the gNB-DU. In one implementation, for example, the NR-U information frame may be the sixth NR-U information frame or the sixth message described previously.

Step 503A: after receiving the delay feedback requirement, the gNB-DU performs parameter collection or delay measurement as needed, as described with reference to example six.

Step 504A: and the gNB-DU feeds the delay result and/or the gNB-DU timestamp parameter and/or the feedback delay related parameter back to the gNB-CU-UP according to the feedback requirements received in the steps 501A and 502A. In one implementation, for example, the delay result may be sent to the first node by the fourth NR-U information or a fourth message, the information about the timestamp-related parameter may be sent to the first node by the first NR-U information frame or a first message, and the information about the feedback delay-related parameter may be sent to the first node by the second NR-U information frame or a second message or a third NR-U information frame or a third message.

Step 505A: the gNB-CU-UP can directly acquire the time delay, and/or determine or acquire the gNB-DU feedback time delay based on the received information of the time stamp related parameter and/or the feedback time delay related parameter of the gNB-DU, and/or further determine or acquire the interface time delay. The determining mode may obtain or determine the feedback delay of the GTP-U packet in the gNB-DU according to the methods one to twenty one, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F.

Fig. 6 illustrates a method of supporting latency measurements according to an embodiment of the present disclosure. In particular, fig. 6 shows a process of interacting delay related parameters between nodes for a second node to provide the second node delay related parameters and/or other node delay related parameters to a first node. In one implementation, for example, the first node may be a gNB-CU-UP and the second node may be a gNB-CU-CP; the first node may be a gNB-CU-UP and the second node may be a gNB-DU; the first node may be a gNB-CU-CP and the second node may be a gNB-DU; the first node may be a UPF and the second node may be a gNB or a gNB CU-UP or an en-gNB or an eNB or an ng-eNB. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes.

Step 601: and the second node sends the delay result and/or the timestamp parameter and/or the feedback delay related parameter of the second node and/or other nodes to the first node. In one implementation, for example, the delay result, the timestamp related parameter, and the feedback delay related parameter may be sent to the first node by the seventh NR-U information frame or the seventh message, in another implementation, for example, the delay result may be sent to the first node by the fourth NR-U information or the fourth message, the information of the timestamp related parameter may be sent to the first node by the first NR-U information frame or the first message, and the information of the feedback delay related parameter may be sent to the first node by the second NR-U information frame or the second message or the third NR-U information frame or the third message.

Step 602: the first node may directly obtain the time delay, and/or determine or obtain the feedback time delay of the second node and/or further determine or obtain the interface time delay based on the received information of the timestamp related parameter and/or the feedback time delay related parameter at the second node, and/or forward the received parameter or the determined time delay to other nodes. The determining method may obtain or determine the feedback delay of the GTP-U packet at the second node or other nodes according to the methods one to twenty one, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F. After the first node obtains the interface delay, the interface delay can be sent to other nodes according to requirements. For example, the first node may pass through the aforementioned seventh NR-U information frame or seventh message.

Fig. 7 illustrates a method of supporting latency measurements according to an embodiment of the disclosure. Specifically, fig. 7 illustrates the process of the gNB-CU-CP, gNB-CU-UP, and gNB-DU interacting delay related parameters for the gNB-DU and the gNB-CU-CP to provide the gNB-CU-UP with the gNB DU delay related parameters.

Step 701: and the gNB-DU sends the delay result and/or the timestamp parameter and/or the feedback delay related parameter of the gNB-DU to the gNB-CU-CP. In an implementation manner, the delay result may be sent to the gNB-CU-CP by the fourth message, the information of the timestamp-related parameter may be sent to the gNB-CU-CP by the first message, and the information of the feedback delay-related parameter may be sent to the gNB-CU-CP by the second message or the third message.

Step 702: and the gNB-CU-CP sends the time delay result and/or the time stamp parameter of the gNB-DU and/or the feedback time delay related parameter to the gNB-CU-UP. In one implementation, the latency result may be sent to the gNB-CU-UP by the aforementioned seventh message.

Step 703: the gNB-CU-UP can directly acquire the time delay, and/or determine or acquire the gNB-DU feedback time delay based on the received information of the time stamp related parameter and/or the feedback time delay related parameter of the gNB-DU, and/or further determine or acquire the interface time delay. The determining mode may obtain or determine the feedback delay of the GTP-U packet in the gNB-DU according to the methods one to twenty one, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F.

Each of the methods described above in connection with fig. 3-7 may be implemented separately. Alternatively, a part of the steps of one method may be separately performed. Or part or all of one method may be practiced in combination with part or all of any of the other one or more examples.

Fig. 8 illustrates a method 800 performed by a first node 900 in a wireless communication system according to an embodiment of the disclosure. The first node 900 can determine the interface latency of the first node 900 and the second node 1100 by this method.

Referring to fig. 8, a first node 900 receives first information from a second node 1100 in a wireless communication system in step 801. In step 802, the first node 900 determines an interface delay of the GTP-U packet between the GTP-U packet sending node and the GTP-U packet receiving node in response to receiving the first information. The first information may be the first NR-U information frame and/or the first message, and/or the second NR-U information frame and/or the second message, and/or the third NR-U information frame and/or the third message, and/or the fourth NR-U information frame and/or the fourth message, and/or the seventh NR-U information frame and/or the seventh message described above. The first node 900 may obtain or determine the feedback delay of the GTP-U packet at the second node 1100 according to the methods one to twenty one described above, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F described above.

Fig. 9 illustrates a first node 900 in a wireless communication system according to an embodiment of the disclosure. The first node 900 comprises a transceiver 910 and a processor 920. The transmitter 910 may be configured to transmit and/or receive signals to/from the outside. The processor 920 may be configured to control the transceiver 910 to: receiving first information from a second node 1100 in the wireless communication system; and responding to the received first information, and determining the interface delay of the GTP-U packet between the GTP-U packet sending node and the GTP-U packet receiving node. The first node 900 may be implemented in hardware, software, or a combination of hardware and software to enable it to perform any one or more of the steps of any of the methods described by the present disclosure. For example, the first node 900 may be a gNB-CU-UP, and the second node 1100 may be a gNB-DU; the first node 900 may be a gNB-CU-CP and the second node 1100 may be a gNB-DU; the first node 900 may be a UPF and the second node 1100 may be a gNB or a gNB CU-UP or an en-gNB or an eNB or an ng-eNB; the first node 900 may be a gNB-CU-UP and the second node 1100 may be a gNB-CU-CP. However, the present disclosure is not limited thereto, and the first node and the second node may be other nodes.

Fig. 10 shows a method 1000 performed by a second node 1100 in a wireless communication system according to an embodiment of the disclosure.

Referring to fig. 10, the second node 1100 transmits first information to the first node 900 in step 1001. The first information may be used by the first node 900 to determine an interface latency of a GTP-U packet between a GTP-U packet sending node and a GTP-U packet receiving node. The first information may be the first NR-U information frame and/or the first message, and/or the second NR-U information frame and/or the second message, and/or the third NR-U information frame and/or the third message, and/or the fourth NR-U information frame and/or the fourth message, and/or the seventh NR-U information frame and/or the seventh message described above. The first node 900 may obtain or determine the feedback delay of the GTP-U packet at the second node 1100 according to the methods one to twenty one described above, and/or obtain or determine the interface delay of the GTP-U packet according to the methods a to F described above.

Fig. 11 illustrates a second node 1100 in a wireless communication system according to an embodiment of the disclosure. The second node 1100 comprises a transceiver 1110 and a processor 1120. The transmitter 1110 may be configured to transmit and/or receive signals to/from the outside. The processor 1120 may be configured to control the transceiver 1110: the first information is sent to the first node 900. The first information may be used by the first node 900 to determine an interface delay of the GTP-U packet between the GTP-U packet sending node and the GTP-U packet receiving node. The second node 1100 may be implemented in hardware, software, or a combination of hardware and software to enable it to perform any one or more of the steps of any of the methods described by the present disclosure. For example, the first node 900 may be a gNB-CU-UP, and the second node 1100 may be a gNB-DU; the first node 900 may be a gNB-CU-CP and the second node 1100 may be a gNB-DU; the first node 900 may be a UPF and the second node 1100 may be a gNB or a gNB CU-UP or an en-gNB or an eNB or an ng-eNB; the first node 900 may be a gNB-CU-UP and the second node 1100 may be a gNB-CU-CP. However, the present disclosure is not limited thereto, and the first node 900 and the second node 1100 may be other nodes.

The present disclosure provides a method performed by a first node in a wireless communication system, comprising: receiving first information from a second node in the wireless communication system; and in response to receiving the first information, determining an interface delay of a general packet radio service tunneling protocol user plane (GTP-U) packet between a GTP-U packet sending node and a GTP-U packet receiving node.

Optionally, the first information comprises at least one of: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; GTP-U packet feedback time delay; the feedback time delay of a GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission indication; a GTP-U packet Hybrid Automatic Repeat request (HARQ) retransmission indication; waiting time of a GTP-U packet receiving node; GTP-U packet latency; RLC retransmission times of a GTP-U packet; HARQ retransmission times of a GTP-U packet; accumulated HARQ retransmission times of the GTP-U packet; d1, delaying time; d1 time delay of a GTP-U packet; d2, time delay; d2 time delay of a GTP-U packet; d3, delaying time; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring the time delay.

Optionally, the first node further transmits second information to the second node, wherein the second information comprises at least one of: the sending time of a GTP-U packet; a time delay feedback requirement.

Optionally, the latency feedback requirement comprises at least one of: the method comprises the following steps of feedback delay report polling, DU feedback delay time report polling, F1-U measurement delay report polling, NR PDCP SN of delay parameters needing to be reported, delay direction, delay type, delay parameter type, feedback granularity, result reporting type and result reporting period.

Optionally, the first information is comprised in a new radio user plane protocol NR-U information frame or message and the second information is comprised in another new radio user plane protocol NR-U information frame or another message.

Optionally, the NR-U infoframe comprises at least one of: auxiliary information data information frame, downlink data transmission state information frame, newly defined information frame; the another NR-U information frame includes at least one of: auxiliary information data information frame, downlink data transmission state information frame, newly defined information frame; the message includes at least one of: f1 message, NG message, E1 message, xn message, X2 message; and the further message comprises at least one of: f1 message, NG message, E1 message, xn message, X2 message.

Optionally, the determining the interface delay of the GTP-U packet between the GTP-U packet sending node and the GTP-U packet receiving node includes: determining a feedback delay of the GTP-U packet at a GTP-U packet receiving node based on the first information; and determining the interface delay based on the receiving time point of the first information at the GTP-U packet sending node, the sending time point of the GTP-U packet and the feedback delay.

Optionally, the determining of the interface delay of the GTP-U packet between the GTP-U packet sending node and the GTP-U packet receiving node includes one of: determining the difference value between the receiving time point of the first information at the GTP-U packet sending node and the sending time point of the first information at the GTP-U packet receiving node as the interface delay; determining the difference value between the receiving time point of the GTP-U packet and the sending time point of the GTP-U packet as the interface time delay; determining the D3 time delay as the interface time delay; determining the D3 time delay of the GTP-U packet as the interface time delay; and determining the interface time delay between the nodes as the interface time delay.

Optionally, the first node is a GTP-U packet sending node and the second node is a GTP-U packet receiving node.

Optionally, receiving the first information from the second node in the wireless communication system comprises: the first information sent by the second node in response to the GTP-U packet is received, or the first information sent by the second node in response to receiving the first information from the GTP-U packet receiving node is received.

Optionally, the first node and the second node are configured as one of: the first node is a gNB-CU-UP and the second node is a gNB-DU; the first node is a gNB-CU-CP and the second node is a gNB-DU; the first node is UPF, the second node is one of gNB, gNB CU-UP, en-gNB, eNB and ng-eNB; the first node is a gNB-CU-UP and the second node is a gNB-CU-CP.

Optionally, the method further comprises: and sending the determined interface delay or the first information to a third node.

Optionally, in the case that the first node is a gNB-CU-CP and the third node is a gNB-CU-UP, the first node sends the determined interface delay or the first information to the third node through a gNB-CU-CP measurement result information message. According to another aspect of the present disclosure, there is provided a method performed by a second node in a wireless communication system, comprising: sending first information to a first node; and wherein the first information is used by the first node to determine an interface delay of a general packet radio service tunneling protocol user plane, GTP-U, packet between the GTP-U packet sending node and the GTP-U packet receiving node.

Optionally, the first information comprises at least one of: a receiving time point of a GTP-U packet; the first information is sent at the sending time point of a GTP-U packet receiving node; GTP-U packet feedback time delay; the feedback time delay of the GTP-U packet receiving node; the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed; a GTP-U packet retransmission indication; a GTP-U packet Radio Link Control (RLC) retransmission indication; a GTP-U packet Hybrid Automatic Repeat request (HARQ) retransmission indication; waiting time of a GTP-U packet receiving node; waiting time of GTP-U packets; RLC retransmission times of a GTP-U packet; HARQ retransmission times of a GTP-U packet; accumulated HARQ retransmission times of the GTP-U packet; d1, time delay; d1 time delay of a GTP-U packet; d2, delaying time; d2 time delay of a GTP-U packet; d3, delaying time; d3 time delay of a GTP-U packet; time delay of an interface between nodes; and measuring time delay.

Optionally, the second node further receives second information from the first node, wherein the second information comprises at least one of: the sending time of a GTP-U packet; a delay feedback requirement.

Optionally, the NR-U infoframe comprises at least one of: an auxiliary information data information frame, a downlink data transmission state information frame and a newly defined information frame; the another NR-U information frame includes at least one of: auxiliary information data information frame, downlink data transmission state information frame, newly defined information frame; the message includes at least one of: f1 message, NG message, E1 message, xn message, X2 message; and the further message comprises at least one of: f1 message, NG message, E1 message, xn message, X2 message.

Optionally, the first information is used by the first node to determine a feedback delay of the GTP-U packet at the GTP-U packet receiving node; and the receiving time point of the first information at the GTP-U packet sending node, the sending time point of the GTP-U packet and the feedback time delay are used by the first node for determining the interface time delay.

Optionally, one of the following ways is used by the first node to determine the interface latency: determining the difference value between the receiving time point of the first information at the GTP-U packet sending node and the sending time point of the first information at the GTP-U packet receiving node as the interface time delay; determining the difference value between the receiving time point of the GTP-U packet and the sending time point of the GTP-U packet as the interface time delay; determining the D3 time delay as the interface time delay; determining the D3 time delay of the GTP-U packet as the interface time delay; and determining the interface time delay between the nodes as the interface time delay.

Optionally, the sending the first information to the first node includes: and sending the first information generated by the second node in response to the GTP-U packet or sending the first information acquired by the second node in response to receiving the first information from the GTP-U packet receiving node.

Optionally, the first node and the second node are configured as one of: the first node is a gNB-CU-UP and the second node is a gNB-DU; the first node is a gNB-CU-CP and the second node is a gNB-DU; the first node is UPF, the second node is one of gNB, gNB CU-UP, en-gNB, eNB and ng-eNB; the first node is a gNB-CU-UP and the second node is a gNB-CU-CP. According to yet another aspect of the present disclosure, there is provided a node in a wireless communication network, comprising: a transceiver configured to transmit and receive signals; and a controller configured to control the transceiver to perform various methods of the present disclosure.

Various embodiments of the present disclosure may be implemented as computer readable code embodied on a computer readable recording medium from a particular perspective. The computer readable recording medium may be a volatile computer readable recording medium or a non-volatile computer readable recording medium. The computer readable recording medium is any data storage device that can store data readable by a computer system. Examples of the computer readable recording medium may include read-only memory (ROM), random-access memory (RAM), compact disc read-only memory (CD-ROM), magnetic tapes, floppy disks, optical data storage devices, carrier waves (e.g., data transmission via the internet), and the like. The computer-readable recording medium can be distributed over network-connected computer systems and thus the computer-readable code can be stored and executed in a distributed fashion. Also, functional programs, codes, and code segments for implementing various embodiments of the present disclosure may be easily construed by those skilled in the art to which the embodiments of the present disclosure are applied.

It will be understood that embodiments of the present disclosure may be implemented in hardware, software, or a combination of hardware and software. The software may be stored as program instructions or computer readable code executable on a processor on a non-transitory computer readable medium. Examples of the non-transitory computer-readable recording medium include magnetic storage media (e.g., ROMs, floppy disks, hard disks, etc.) and optical recording media (e.g., CD-ROMs, digital Video Disks (DVDs), etc.). The non-transitory computer-readable recording medium can also be distributed over network-coupled computer systems so that the computer-readable code is stored and executed in a distributed fashion. The medium may be read by a computer, stored in a memory, and executed by a processor. The various embodiments may be implemented by a computer or a portable terminal including a controller and a memory, and the memory may be an example of a non-transitory computer-readable recording medium adapted to store program(s) having instructions to implement the embodiments of the present disclosure. The present disclosure may be realized by a program having codes for embodying the apparatus and method described in the claims, the program being stored in a machine (or computer) readable storage medium. The program may be electronically carried on any medium, such as a communication signal conveyed via a wired or wireless connection, and the present disclosure suitably includes equivalents thereof.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can make various changes or substitutions within the technical scope of the present disclosure, and the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A method performed by a first node in a wireless communication system, comprising:

receiving first information from a second node in the wireless communication system; and

in response to receiving the first information, determining an interface delay of a GPRS tunneling protocol user plane (GTP-U) packet between a GTP-U packet sending node and a GTP-U packet receiving node.

2. The method of claim 1, wherein the first information comprises at least one of:

a receiving time point of a GTP-U packet;

the first information is sent at the sending time point of a GTP-U packet receiving node;

the first information is at the receiving time point of a GTP-U packet sending node;

a sending time point of a GTP-U packet;

GTP-U packet feedback time delay;

the feedback time delay of a GTP-U packet receiving node;

the feedback time delay of the unremitted packet of the GTP-U packet receiving node is delayed;

a GTP-U packet retransmission indication;

a GTP-U packet Radio Link Control (RLC) retransmission instruction;

a GTP-U packet hybrid automatic repeat request HARQ retransmission indication;

waiting time of a GTP-U packet receiving node;

waiting time of GTP-U packets;

RLC retransmission times of a GTP-U packet;

HARQ retransmission times of GTP-U packets;

accumulated HARQ retransmission times of the GTP-U packet;

d1, delaying time;

d1 time delay of a GTP-U packet;

d2, time delay;

d2 time delay of a GTP-U packet;

d3, delaying time;

d3 time delay of a GTP-U packet;

time delay of an interface between nodes;

and measuring the time delay.

3. The method of claim 1, wherein the first node further transmits second information to the second node, wherein the second information comprises at least one of: the sending time of a GTP-U packet; a time delay feedback requirement.

4. The method of claim 3, wherein the latency feedback requirements comprise at least one of: the method comprises the following steps of feedback delay report polling, DU feedback delay time report polling, F1-U measurement delay report polling, NR PDCP SN of delay parameters needing to be reported, delay direction, delay type, delay parameter type, feedback granularity, result reporting type and result reporting period.

5. The method according to any of claims 1-4, wherein the first information is comprised in a new radio user plane protocol, NR-U, information frame or message, and

the second information is included in another new radio user plane protocol NR-U information frame or another message.

6. The method of claim 5, wherein the NR-U information frame comprises at least one of: an auxiliary information data information frame, a downlink data transmission state information frame and a newly defined information frame;

the message includes at least one of: f1 message, NG message, E1 message, xn message, X2 message.

7. The method of claim 2, wherein the determining an interface latency of a GTP-U packet between a GTP-U packet sending node and a GTP-U packet receiving node comprises:

determining a feedback delay of the GTP-U packet at a GTP-U packet receiving node based on the first information; and

and determining the interface delay based on the receiving time point of the first information at the GTP-U packet sending node, the sending time point of the GTP-U packet and the feedback delay.

8. The method of claim 2, wherein the determining an interface latency of a GTP-U packet between a GTP-U packet sending node and a GTP-U packet receiving node comprises one of:

determining the difference value between the receiving time point of the first information at the GTP-U packet sending node and the sending time point of the first information at the GTP-U packet receiving node as the interface delay;

determining the difference value between the receiving time point of the GTP-U packet and the sending time point of the GTP-U packet as the interface time delay;

determining the D3 time delay as the interface time delay;

determining the D3 time delay of the GTP-U packet as the interface time delay; and

and determining the interface time delay between the nodes as the interface time delay.

9. The method according to any of claims 1-4, wherein the first node is a GTP-U packet sender node and the second node is a GTP-U packet receiver node.

10. The method of any of claims 1-4, wherein receiving first information from a second node in a wireless communication system comprises: the first information sent by the second node in response to the GTP-U packet or the first information sent by the second node in response to receiving the first information from the GTP-U packet receiving node is received.

11. The method of any of claims 1-4, wherein the first node and the second node are configured as one of:

the first node is a gNB central unit user plane gNB-CU-UP, and the second node is a gNB distribution unit gNB-DU;

the first node is a gNB central unit control plane gNB-CU-CP, and the second node is a gNB-DU;

the first node is a user plane function UPF, and the second node is one of a next generation node B gNB, gNB CU-UP, en-gNB, an evolved node B eNB and an ng-eNB;

the first node is a gNB-CU-UP and the second node is a gNB-CU-CP.

12. The method of any of claims 1-4, further comprising: and sending the determined interface delay or the first information to a third node.

13. The method of claim 11, wherein the first node sends the determined interface delay or the first information to the third node via a gbb-CU-CP measurement information message if the first node is a gbb-CU-CP and the third node is a gbb-CU-UP.

14. A method performed by a second node in a wireless communication system, comprising:

sending first information to a first node; and is

The first information is used by the first node for determining the interface time delay of a general packet radio service tunneling protocol user plane GTP-U packet between a GTP-U packet sending node and a GTP-U packet receiving node.

15. A node in a wireless communication network, comprising:

a transceiver configured to transmit and receive signals; and

a controller configured to control the transceiver to perform the method of any one of claims 1-14.