WO2019233465A1

WO2019233465A1 - Path time delay information acquisition method and related device

Info

Publication number: WO2019233465A1
Application number: PCT/CN2019/090234
Authority: WO
Inventors: 李铕; 袁世通; 朱元萍; 戴明增
Original assignee: 华为技术有限公司
Priority date: 2018-06-08
Filing date: 2019-06-06
Publication date: 2019-12-12
Also published as: CN110582092B; CN110582092A

Abstract

Provided by the present application are a path time delay information acquisition method and a related device, the method of an embodiment of the present application comprising: a first network element device generating time delay detection information, the time delay detection information comprising a timestamp, and the timestamp being used for representing the sending time of the time delay detection information; the first network element device sending the time delay detection information to a second network element device by means of a transmission path, wherein the transmission path is used for representing a multi-hop wireless backhaul link between the first network element device and the second network element device; the second network element device may determine time delay information of the time delay detection information according to the timestamp, and during subsequent path selection, a data transmission path may be selected by using the path time delay information, thereby reducing the signaling overhead and complexity of path selection.

Description

Method for acquiring path delay information and related equipment

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China on June 8, 2018, with application number 201810590081.3, and the invention name is "Path Delay Information Acquisition Method and Related Equipment", the entire contents of which are incorporated by reference. In this application.

Technical field

This application relates to the field of communications, and in particular, to a method and device for acquiring path delay information.

Background technique

In a Long Term Evolution (LTE) communication system, a relay node (RN) is deployed to forward data between a base station (eNB) and a terminal device. The RN is a device with a relay function, such as a base station or a terminal device. To achieve the purpose of enhancing network capacity and solving the problem of covering blind spots. In the 5G-oriented wireless relay networking scenario, in addition to supporting LTE relay scenarios, multi-hop wireless relay and multi-connection scenarios are also supported. Figure 1 shows the network tree topology of the wireless access network side in the multi-hop and multi-connection wireless relay networking scenario. The RN and the host base station (Donor, NodeB, DgNB) serving the relay have a clear hierarchical relationship. The uplink and downlink transmission paths for the terminal device (UE1 in FIG. 1) may be transmission paths formed by RN2, RN1, and DgNB, or transmission paths formed by RN2, RN4, RN3, and DgNB. When there are multiple transmission paths, an appropriate transmission path needs to be selected in order to meet the Quality of Service (QoS) requirements of business data. For example, select a transmission path with low transmission delay for delay-sensitive business data.

In the traditional path selection method, because the data radio bearers (DRB) of different terminal devices have scheduling priorities, and the DRBs of terminal devices with different QoS Class Identifiers (QCIs) are mapped to The same RN DRB may have scheduling priority among data from different DRBs of the same terminal device. If the uplink transmission resources at the current scheduling time are limited, there will be more data on the DRB that cannot be scheduled. Waiting for the delay, in order to select a data transmission path that meets the QoS requirements of the data, network topology information (that is, the number of RN node hops and the distance between RN nodes on each data transmission path), and the configuration of each RN node need to be obtained. Information and capability information (that is, uplink and downlink frame configuration information, backhaul (BH) transmission bandwidth and BH available time-frequency resources, etc.) and specific scheduling conditions (that is, scheduling algorithms, channel quality, and RN node load), etc. Then formulate complex selection criteria and integrate the above multiple dimensions as the basis for selecting the transmission path.

Because the selection of transmission paths depends on information in multiple dimensions, on the one hand it takes a lot of network resources, and on the other hand, the selection of transmission paths requires the integration of multi-dimensional information, which makes implementation difficult. Therefore, the existing transmission path selection methods increase the information. The cost and complexity of path selection.

Summary of the Invention

This application provides a method and device for acquiring path delay information, and acquires path delay information of a transmission path through delay detection information, thereby reducing signaling overhead and complexity of path selection.

A first aspect of the present application provides a method for acquiring path delay information, including: generating, by a first network element device, delay detection information, the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information. The path sends delay detection information to the second network element device, and the transmission path is used to indicate a multi-hop wireless backhaul link between the first network element device and the second network element device.

When the first network element device receives data from the terminal device, a known network topology structure can be used to determine the second network element device that the data needs to reach, or the first network element device is configured to communicate with the second network element device Data transmission path, the first network element device generates delay detection information, the delay detection information includes a time stamp, and the time stamp indicates the sending time when the first network element device sends the delay detection information, then the second network element When the device receives the delay detection information, the second network element device can determine the delay information of the delay detection information according to the timestamp. In subsequent path selection, the path transmission information can be used to select the data transmission path, thereby reducing This increases the signaling overhead and complexity of path selection.

With reference to the first aspect of the present application, in a first possible implementation manner, the transmission path includes a data transmission path or a transmission path of delay detection information.

The transmission path can have two forms. One is to determine the transmission path through the QoS management and routing function when the first network element device receives the data from the terminal device. This transmission path is called the data transmission path. No terminal equipment access, connected terminal equipment but no data transmission, or terminal equipment has data transmission but the QoS of the data belongs to only part of the QCI information, and does not cover all the QCI information that the network can support, then you need to configure The transmission path that satisfies the preset QCI information may not be transmitted on the transmission path, but is only used to send the delay detection information, which is called the transmission path of the delay detection information.

With reference to the first possible implementation manner of the first aspect of the present application, the second possible implementation manner includes: the first network element device determines a data transmission path of a data packet to be transmitted;

The first network element device sending the delay detection information to the second network element device through the transmission path includes: the first network element device sends the delay detection information to the second network element device through the data transmission path.

When the first network element device receives the data packet to be transmitted, the data packet to be transmitted may include the ID of the terminal device, and then according to the network topology or topology information known to the first network element device, such as between access nodes (DgNB and Connection between RN, RN and RN) and connection between UE and access node, if the first network element device is DgNB, the RN connected to the terminal device can be determined to determine the transmission path between DgNB and RN As a data transmission path; if the first network element device is an RN connected to a terminal device, DgNB may be determined, thereby determining a data transmission path between the DgNB and the RN. Therefore, the first network element device can determine the data transmission path of the data packet to be transmitted, and send the delay detection information to the second network element device through the data transmission path.

With reference to the second possible implementation manner of the first aspect of the present application, in a third possible implementation manner, the determining, by the first network element device, a data transmission path of a data packet to be transmitted includes: the first network element device according to the data packet to be transmitted QCI information to determine the data transmission path;

The first network element device sends delay detection information to the second network element device through a transmission path, and includes: when the QCI information meets a preset QCI condition, the first network element device sends a delay to the second network element device through a data transmission path Probe information.

The transmission path can be associated with QCI information. For example, the data transmission path supports the transmission of data packets corresponding to QoS flows with specific QoS requirements / carrying specific QCI information. Then, the first network element device obtains a QoS flow attribute corresponding to the data packet to be transmitted, such as an identifier of the QoS flow, thereby determining QCI information / QoS requirements of the data packet to be transmitted, and then determines a data transmission path according to the QCI information of the data packet to be transmitted. Assuming that the QCI information includes a QCI identifier, if the QCI identifier of a data packet to be transmitted is equal to the QCI identifier supported by the transmission path, the data packet can be transmitted on the transmission path. Assume that the QCI information includes a delay requirement. If the delay requirement corresponding to the data packet to be transmitted is equal to the delay requirement supported by the transmission path, the data packet can be transmitted on the transmission path. Filter the data transmission path for sending the delay detection information according to the QCI information of the data packet to be transmitted and the preset QCI condition. Assuming that the preset QCI condition includes that the QCI identifier is equal to the QCI supported by the data transmission path, delay detection is performed on the data transmission path, and then delay detection information is sent to the second network element device through the data transmission path. Assuming that the preset QCI condition includes a delay requirement, and the delay requirement of a data packet to be transmitted is equal to the delay requirement corresponding to the preset QCI condition, then a delay detection is performed on the data transmission path, and then the data transmission path is transmitted to The second network element device sends delay detection information.

With reference to any one of the first to the third possible implementation manners in the first aspect of the present application, in a fourth possible implementation manner, the first network element device sends a delay to the second network element device through a data transmission path. The detection information includes: the first network element device uses the first method to send delay detection information to the second network element device through a data transmission path, and the first method includes sending a delay after sending a preset number of data packets Probe information.

The first method includes sending delay detection information after sending a preset number of data packets. The specific process is: assuming the preset number of data packets is 4, then when the first packet to be transmitted is sent, the delay detection information It is sent together with the first to-be-transmitted data packet, and after the second to fifth to-be-transmitted data packets are sent, no delay detection information is sent. When the sixth to-be-transmitted data packet is sent, Delay detection information. After the seventh to tenth data packets to be transmitted are sent, no delay detection information is sent. When the eleventh data packet to be transmitted is sent, the delay detection information is sent. The delay detection information is sent with the 6th and 11th data packets to be transmitted; or, the delay detection information can also be sent separately, that is, a separate adaptation layer is used when sending the 6th and 11th data with transmission Protocol data unit to send delay detection information. By sending the delay detection information in the first manner, it is not necessary to send the delay detection information at the same time as each data packet to be transmitted, which can reduce the number of delay detection information transmissions and save network resources.

With reference to any one of the first to third possible implementation manners in the first aspect of the present application, in a fifth possible implementation manner, the first network element device sends a delay to the second network element device through a data transmission path. The detection information includes: the first network element device uses the second method and sends the delay detection information to the second network element device through the data transmission path, wherein the second method includes sending the delay detection information by using a preset delay interval .

The second method includes sending the delay detection information using a preset delay interval. The specific process is as follows: assuming that there are 6 data packets to be transmitted, the transmission time interval of the data packets to be transmitted is 1 second, and the preset delay interval is It is 5s. When the first packet to be transmitted is sent, the delay detection information is sent. After the second to fifth packets to be transmitted are not sent, the delay detection information is not sent. When the transmission data packet is sent, the time interval between the transmission of the first data packet to be transmitted is 5s, and the delay detection information is sent. The delay detection information is sent together with the sixth data packet to be transmitted. Alternatively, the delay detection information can also be sent separately. Send, that is, when sending the sixth data to be transmitted, a separate adaptation layer protocol data unit is used to send the delay detection information. Exemplarily, when there is no data packet to be transmitted after waiting for a preset time interval, the method of separately sending delay detection information can obtain path delay information in time without waiting for the arrival of the next data packet to be transmitted.

With reference to the first aspect of the present application, in a sixth possible implementation manner, the first network element device obtains configuration information of delay detection information, where the configuration information of delay detection information includes path configuration information and transmission configuration information;

The first network element device determines a transmission path of the delay detection information according to the path configuration information, and determines a third transmission mode of the delay detection information according to the transmission configuration information;

The delay detection information generated by the first network element device includes: the delay detection information generated by the first network element device, and the delay detection information includes a transmission path and a time stamp of the delay detection information;

The first network element device sends the delay detection information to the second network element device through the transmission path, which includes: the first network element device uses the third transmission method, and sends the delay detection information to the first through the transmission path of the delay detection information. Second network element equipment.

There is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission but the QoS flow to which the data belongs involves only part of the QCI information, and does not cover all the QCI information that the network can support. It is necessary to configure a transmission path that satisfies the preset QCI information. There is no data transmission on the transmission path, but it is only used to send the delay detection information, which is called the transmission path of the delay detection information. It is assumed that the terminal equipment is not connected; or, the terminal equipment has been accessed but no data transmission has been performed; or, the terminal equipment has data transmission but the QoS Flow to which the data belongs only relates to QCI1, but in fact the QosFlow to which the terminal equipment's data belongs is Including QCI1 and QCI2, if you need to perform delay statistics on the transmission path that meets the QCI2 between the terminal device and the DgNB, you need to configure the transmission path that meets the QCI2 in advance. The first network element device obtains the delay detection information. Configuration information, including path configuration information and transmission configuration information, the path configuration information is used to configure a transmission path that meets the preset QCI information, the configuration information is used to configure the transmission method of the delay detection information, and the delay is determined according to the path configuration information The transmission path of the detection information determines the third transmission method of the delay detection information according to the transmission configuration information, and generates the delay detection information. The delay detection information includes the transmission path and the time stamp of the delay detection information. The third transmission method is adopted. Sending the delay detection information to the second network through the transmission path of the delay detection information Equipment.

With reference to the sixth possible implementation manner of the first aspect of the present application, in a seventh possible implementation manner, the third sending manner includes sending the delay detection information by using a preset delay interval.

A second aspect of the present application provides a method for acquiring path delay information, including: the second network element device receives delay detection information sent by the first network element device, the delay detection information includes a time stamp, and the time stamp is used to represent a delay Sending time of detection information;

The second network element device determines path delay information of the transmission path according to the delay detection information, and the transmission path is used to indicate a multi-hop backhaul link between the first network element device and the second network element device.

The second network element device receives the delay detection information sent by the first network element device. The delay detection information includes a time stamp. The time stamp is used to indicate the time when the delay detection information is sent. After receiving the delay detection information, the transmission path is determined. After that, the delay can be determined according to the time stamp in the delay detection information, so as to obtain the path delay information of the transmission path. In the subsequent path selection, the path delay information can be used to select the transmission path, thereby reducing the Signaling overhead and complexity of path selection.

With reference to the second aspect of the present application, in a first possible implementation manner, the transmission path includes a data transmission path or a transmission path of delay detection information.

The transmission path can have two forms. One is to determine the transmission path through the QoS management and routing function when the first network element device receives the data from the terminal device. This transmission path is called the data transmission path. No terminal equipment access, connected terminal equipment but no data transmission, or terminal equipment has data transmission but the QoS of the data belongs to only part of the QCI information, and does not cover all the QCI information that the network can support, then you need to configure The transmission path that satisfies the preset QCI information may not be transmitted on the transmission path, but is only used to send the delay detection information, which is called the transmission path of the delay detection information. The delay detection information can be used as a data packet to participate in scheduling at the MAC layer, and the preset QCI is used for the MAC layer scheduling.

With reference to the first possible implementation manner of the second aspect of this application, in a second possible implementation manner, the second network element device receiving the delay detection information sent by the first network element device includes:

The second network element device receives the delay detection information sent by the first network device through the data transmission path. The data transmission path is a data transmission path of the data packet to be transmitted determined by the first network element device, and the data transmission path is the first network element device. Determined according to the QCI information of the data packet to be transmitted.

The data transmission path is determined by the first network element device according to the QCI information of the data packet to be transmitted, then the delay detection information sent by the first network element device through the data transmission path, and the second network element device receives the data from the first network device. Delay detection information sent by the transmission path.

With reference to the first or second possible implementation manner of the second aspect of this application, in a third possible implementation manner, the second network element device receiving the delay detection information sent by the first network device through a data transmission path includes: The second network element device receives the delay detection information sent by the first network element device through the first mode and the data transmission path, where the first mode includes sending the delay detection information after sending a preset number of data packets.

The first network element device may use the first method and send the delay detection information through the data transmission path. The first method includes sending the delay detection information after sending a preset number of data packets, and then the second network element device receives the first The delay detection information sent by the network element device through the first mode and the data transmission path. By transmitting the delay detection information in the first manner, it is not necessary to send the delay detection information at the same time as each data packet to be transmitted, which can reduce the number of delay detection information transmissions and save network resources.

With reference to the first or second possible implementation manner of the second aspect of the present application, in a fourth possible implementation manner, the second network element device receiving the delay detection information sent by the first network device through a data transmission path includes: The second network element device receives the delay detection information sent by the first network element device through the second method and the data transmission path, where the second method includes sending the delay detection information by using a preset delay interval.

The first network element device may use a second method and send delay detection information through a data transmission path. The second method includes sending the delay detection information using a preset delay interval. Then, the second network element device receives the first network element. Delay detection information sent by the device through the second mode and the data transmission path. The second method is used to transmit the delay detection information. When there is no data packet to be transmitted after waiting for a preset time interval, the method of sending the delay detection information alone can obtain the path delay information in time without waiting for the next data packet to be transmitted. Arrival.

With reference to the second aspect of the present application, in a fifth possible implementation manner, the second network element device receiving the delay detection information sent by the first network element device includes: the second network element device receiving the first network element device through the third The transmission method and the delay detection information transmitted on the transmission path of the delay detection information, and the third transmission method includes transmitting the delay detection information by using a preset delay interval.

There is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission but the QoS flow to which the data belongs involves only part of the QCI information, and does not cover all the QCI information that the network can support. It is necessary to configure a transmission path that satisfies the preset QCI information. There is no data transmission on the transmission path, but it is only used to send the delay detection information, which is called the transmission path of the delay detection information. The first network element device uses a third transmission method to send delay detection information through a transmission path of the delay detection information, and the second network element device receives the first network element device to send through the third transmission method and the transmission path of the delay detection information. Delay detection information. The delay detection information is sent separately, and the path delay information of the transmission path can still be obtained in the case of data packet transmission without specific QCI information.

A third aspect of the present application provides a first network element device, and the first network element device has a function of realizing the behavior of the first network element device in the foregoing method. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

With reference to the third aspect of the present application, in a first possible implementation manner, the structure of the first network element device includes a processor and a transmitter, and the processor is configured to support the first network element device to execute a corresponding method in the foregoing method. Features. The transmitter is configured to support communication between the first network element device and the second network element device, and send the delay detection information involved in the foregoing method to the second network element device. The first network element device may further include a memory, which is configured to be coupled to the processor, and stores the program instructions and data necessary for the first network element device.

A fourth aspect of the present application provides a second network element device, and the second network element device has a function of implementing the behavior of the second network element device in the foregoing method design. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. The modules may be software and / or hardware.

With reference to the fourth aspect of the present application, in a first possible implementation manner, the structure of the second network element device includes a receiver and a processor, and the receiver is configured to support the second network element device to receive the first network element device. Delay detection information sent. The processor controls the second network element device to determine the path delay information of the transmission path according to the delay detection information received by the receiver. The second network element device may further include a memory, which is configured to be coupled to the processor, and stores the program instructions and data necessary for the second network element device.

A fifth aspect of the present application provides a chip system, which includes: applied to a first network element device, the chip system includes at least one processor and an interface circuit, the transceiver and the at least one processor are interconnected through a line, and the processor executes the third Aspect or the operation of the first network element device in the first possible implementation manner of the third aspect.

A sixth aspect of the present application provides a chip system, which is characterized in that the chip system is applied to a second network element device. The chip system includes at least one processor and an interface circuit, and the transceiver and the at least one processor are interconnected through a line. The operation of the second network element device in the fourth aspect or the first possible implementation manner of the fourth aspect is performed.

A seventh aspect of the present application provides a computer-readable storage medium, which is characterized in that the computer-readable storage medium is applied to a first network element device, and the computer-readable storage medium has instructions stored therein that, when run on the computer, cause the computer to execute Operation of the first network element device in the third aspect or the first possible implementation manner of the third aspect.

An eighth aspect of the present application provides a computer-readable storage medium, which is characterized in that: the computer-readable storage medium is applied to a second network element device, and the computer-readable storage medium has instructions stored therein, which when executed on a computer, cause the computer to execute The fourth aspect or the operation of the second network element device in the first possible implementation manner of the fourth aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a network topology diagram of a multi-hop multi-connection wireless relay networking scenario;

FIG. 2 is a schematic diagram of a BH link and an AC link between a DeNB and an RN;

FIG. 3 is a network topology diagram of a multi-hop single-connection wireless relay networking scenario;

4 is a schematic diagram of a data transmission implementation method based on L2 Relay;

5 is a schematic diagram of signaling interaction according to an embodiment of a method for acquiring path delay information provided by this application;

6 is a schematic diagram of signaling interaction in another embodiment of a method for acquiring path delay information provided by this application;

7 is a schematic diagram of signaling interaction in another embodiment of a method for acquiring path delay information provided by this application;

FIG. 8 is a schematic diagram of signaling interaction for bearer establishment provided by this application;

9 is a schematic diagram of a modular structure of an embodiment of a first network element device provided by this application;

10 is a schematic diagram of a modular structure of an embodiment of a second network element device provided by this application;

11 is a schematic structural diagram of an apparatus according to an embodiment of a first network device provided in this application;

FIG. 12 is a schematic structural diagram of an apparatus according to an embodiment of a second network device provided by this application; FIG.

FIG. 13 is a schematic structural diagram of an embodiment of a chip system provided by the present application.

Detailed ways

The terms "uplink" and "downlink" appearing in this application are used to describe the direction of data / information transmission in some scenarios, for example, the "uplink" direction is the direction in which the data / information is transmitted from the terminal device to the network side, " The "downlink" direction is the direction in which the data / information is transmitted from the network-side device to the terminal device. The "uplink" and "downlink" are only used to describe the direction, and the specific device for the start / stop of the data / information transmission is not limited.

The term "and / or" appearing in this application may be an association relationship describing an associated object, indicating that there may be three kinds of relationships, for example, A and / or B may indicate that: A exists alone, and A and B exist simultaneously There are three cases of B alone. In addition, the character "/" in this application generally indicates that the related objects before and after are an "or" relationship.

Various objects such as various messages / information / equipment / network elements / systems / devices / actions / operations / processes / concepts may be named in this application, but these specific names do not constitute Limitation, the assigned name can be changed according to factors such as scene, context, or usage habits. The understanding of the technical meaning of related objects should be mainly determined by the functions and technical effects embodied / executed in the technical scheme.

The terms "first" and "second" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than what is illustrated or described herein. Furthermore, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device that includes a series of steps or modules need not be limited to those explicitly listed Those steps or modules may instead include other steps or modules not explicitly listed or inherent to these processes, methods, products, or equipment. The naming or numbering of steps in this application does not mean that the steps in the method flow must be performed in the time / logical order indicated by the naming or numbering. The named or numbered process steps can be implemented according to the Technical purposes change the execution order, as long as the same or similar technical effects can be achieved. The division of the modules appearing in this application is a logical division. In actual applications, there can be other divisions. For example, multiple modules can be combined or integrated in another system, or some features can be ignored. , Or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces. The indirect coupling or communication connection between the modules may be electrical or other similar forms. There are no restrictions in the application. In addition, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed into multiple circuit modules, and some or all of them may be selected according to actual needs. Module to achieve the purpose of the solution of this application.

First, the system architecture or scenario applied in this application is briefly introduced.

This application is applied to an Integrated Access & Backhaul (IAB) network system. Compared with the fourth-generation mobile communication system (4G), the fifth-generation mobile communication (5G) puts forward more stringent requirements for all performance indicators of the network. For example, the capacity index has been increased by a factor of 1,000, wider coverage requirements, ultra-high reliability, and ultra-low latency. On the one hand, considering the abundant high-frequency carrier frequency resources, in the hotspot area, in order to meet the 5G ultra-high capacity requirements, the use of high-frequency small stations is becoming increasingly popular. The high-frequency carrier has poor propagation characteristics, severe occlusion attenuation, and poor coverage. Therefore, a large number of densely deployed small stations are required. Correspondingly, it is very expensive to provide fiber backhaul for these large densely deployed small stations, and the construction is difficult. Therefore, economical and convenient backhaul solutions are needed. On the other hand, from the perspective of wide coverage requirements, to provide network coverage in some remote areas, the deployment of optical fibers is difficult and costly, and flexible and convenient access and backhaul solutions need to be designed. . IAB technology provides ideas for solving the above two problems: its access link (Back link) and backhaul link (Backhaul link) both use wireless transmission schemes to avoid fiber deployment.

In the IAB network, the RN can also be called an IAB node (IAB node), which can provide wireless access services for terminal equipment. The RN is connected to the DgNB through a wireless backhaul link to transmit user business data. The DgNB can be a complete entity. It can also be a form in which a centralized unit (Centralized Unit, CU) and a distributed unit (Distributed Unit, DU) are separated, and the DgNB is connected to the core network through a wired link (for example, the core network 5GC connected to a 5G network).

The 4G LTE system introduces the Relay technology. By deploying an RN in the network, it forwards data between the eNB and the terminal equipment (for example, UE) to achieve enhanced network capacity, solve backhaul connections between base stations, and solve the problem of coverage blind spots. For the purpose, its simple network topology is shown in Figure 2. The link between DeNB and RN is called Backhaul (BH) link, and the link between RN and UE is called AC (Access) chain. Wireless transmission schemes are used for AC, AC and BH links. In the 5G-oriented IAB network scenario, in addition to supporting LTE and Relay scenarios, it also supports multi-hop wireless Relay and multi-connection scenarios. The RN accessing the UE is called the access RN or serving RN of the UE. FIG. 3 is a network tree topology diagram of a wireless access network side in a multi-hop wireless relay networking scenario. A link between RN nodes may also be referred to as a BH link. RN and DgNB have a clear hierarchical relationship, and each RN regards the node providing the backhaul service as a parent node or a superior node. For example, RN2 considers RN1, which provides the backhaul service, as the parent node, and RN1's parent node is DgNB. Correspondingly, the uplink data packets of the UE served by RN2 will be transmitted to DgNB via RN2 and RN1 in turn, and then DgNB. Sent to a gateway device (for example, a User Plane Function (UPF) in a 5G network); the downlink data packet of the UE will be received by the DgNB from the mobile gateway device and then sent to the UE through RN1 and RN2 in turn. In an actual relay network, one RN may be provided with two or more parent nodes to provide backhaul services. Then, this is the multi-hop and multi-connection wireless relay networking scenario shown in Figure 1, for the uplink and downlink transmission of UE1. The path may be a transmission path formed by RN2, RN1, and DgNB, or a transmission path formed by RN2, RN4, RN3, and DgNB. Therefore, if only RN nodes and Donor nodes involved in data forwarding are considered or the transmission path includes only RN nodes and Donor nodes, then multiple nodes involved in data transmission constitute a multi-hop connection between the RN and DgNB connected to the terminal. Wireless backhaul link.

The LTE Release 10 (R10) protocol defines Type 1 (Type 1) RN. Type 1 Relay has the necessary Radio Resource Control (RRC) functions in order to support the access control and mobility management of terminal equipment. Type 1 RN has scheduling ability. The relay defined by the R10 protocol stack can be called a Layer 3 (L3) Relay and is called a layer 3 relay. The user plane includes terminal equipment, L3, RN, DeNB, and a serving gateway (Serving Gateway, SGW) / public data network gateway (PGW) (SGW-terminal equipment / PGW-terminal equipment). , The protocol stack of the terminal equipment includes the Internet Protocol (IP) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the media from top to bottom. Access Control (MAC) layer and Physical (PHY) layer; the protocol stack that RN communicates with terminal equipment includes PDCP layer, RLC layer, MAC layer and PHY layer from top to bottom; RN communicates with DeNB The protocol stack from top to bottom includes the General Packet Radio Service Tunneling (Protocol-User Plane, GTP-U) layer, the User Datagram Protocol (UDP) layer, the IP layer, PDCP layer, RLC layer, MAC layer and PHY layer; the protocol stack for communication between DeNB and RN includes GTP-U layer, UDP layer, UDP layer, IP layer, PDCP layer, RLC layer, MAC layer and PHY layer; DeNB and SG The protocol stack of W-UE / PGW-UE communication includes GTP-U layer, UDP layer, IP layer, L2 layer and L1 layer from top to bottom; SGW-UE / PGW-UE includes IP layer from top to bottom, GTP-U layer, UDP layer, IP layer, L2 layer and L1 layer. The R10Relay user plane also has a complete protocol stack, which can provide air interface DRB transmission services for terminal equipment, and can aggregate data from multiple terminal equipment and forward them to the DeNB together through the BH link.

In a 5G New Radio (NR) IAB network, the Relay protocol stack defined by R10 can be reused, but NR also needs to consider the impact of multi-hop on delay, and it needs to support mobility and provide redundant links. In response to demand, NR can consider introducing Layer 2 (L2) Relay, which is called layer 2 relay. This type of Relay has a part of the Layer 2 protocol stack. For example, data is forwarded between the UE, L2, RN, and DgNB based on the PDCP / RLC / MAC protocol data unit (Protocol Data Unit, PDU). Correspondingly, the data is in the intermediate node. Transmission can experience less processing at some protocol layers, with shorter delays and smaller signaling overhead. Figure 4 shows an implementation of data transmission based on L2 Relay. PDCP PDUs are forwarded between UE, L2 RN, and DgNB. In Figure 4, Adpt. Refers to the Adaptation Layer, and PDCP PDU passes The Adaptation Layer added between the PDCP and RLC layers is processed. AdaptationLayer is used to perform one or more of the following functions when transmitting data packets over the wireless backhaul link: routing the data packets, choosing to send back RLC channels / RLC bearers or flow control feedback for the data packets. The wireless backhaul link includes a wireless backhaul link between a relay node (RN or IAB node), and a wireless backhaul link between a relay node and a host node (IAB donor, DgNB, or IAB-donor-DU). Passing link. In the embodiment of the present application, the Adaptation Layer can be used to identify the UE and the UE DRB to which the data belongs when forwarding data between the RN and DgNB; the Service Data Adaptation Protocol (SDAP) uses TS37.324, TS37.324 It is a protocol layer newly introduced by NR relative to LTE, which is used to handle the mapping of QoS flow to DRB. It should be noted that the Adaptation Layer can also be called a backhaul adaptation protocol layer (backhaul adaptation protocol layer, BAP), which is not specifically limited here.

In a 5G IAB network, the RN needs to process the mapping between the UE DRB and the RN DRB based on the QCI. Through the mapping operation, for a certain QCI, a data transmission path from the RN to the DgNB can be formed. The way in which the RN performs QOS management based on QCI can be as follows. The following transmission is used as an example: DgNB receives the downlink data of the UE, and the downlink data carries the quality of service flow ID (QFI). DgNB determines that the QCI information is QCI1 according to the QFI. After that, the UE DRB is mapped to RN1 and DRB1 according to the QoS management function. The mapping rule is that the UE DRB (QCI1) is mapped to RN1 and DRB1 (QCI1), and the data that needs to be sent to the UE is encapsulated as PDCP PDU, and then PDCP PDU is encapsulated. It becomes an Adaptation Layer PDU and then submits it to the RLC layer. The Adaptation Layer can add an identifier for data packet routing, such as the identifier of an IAB node serving the UE. In the embodiment of the present application, the Adaptation Layer PDU adds the UE ID and the UE DRB ID. After RN1 receives the data transmitted by RN1 and DRB1, if there are multiple data transmission paths at this time (for example, the UE can communicate with RN1 through RN2 and RN3) Connection), then RN1 needs to select the next hop RN according to the path selection function. Assuming RN2 is selected, RN1 maps RN1 DRB1 (QCI1) to RN2 DRB2 (QCI1) according to the QoS management function, and RN1 sends an Adaptation Layer PDU to RN2 through RN2DRB2 After RN2 receives the Adaptation Layer PDU, it maps RN2 DRB2 to UE DRB from the UE ID and UE DRB ID carried in the Adaptation Layer PDU, and sends the data to the UE through the UE DRB.

In the above description, UE, RN2, RN1, and DgNB are one path, and UE, RN3, RN1, and DgNB are another path. At this time, RN1 needs to perform the path selection function and the QoS management function to obtain the QoS that meets the data For the required data transmission path, when RN1 performs the path selection function and the Qos management function, the network topology information (that is, the number of hops between the RN node and the distance between RN nodes on each data transmission path), and each RN node must be considered. Configuration information and capability information (i.e., uplink and downlink frame configuration information, backhaul (BH) transmission bandwidth and BH available time-frequency resources, etc.) and specific scheduling conditions (i.e., scheduling algorithm, channel quality, and RN node load), etc. Information, and then formulate complex criteria in order to work out the data transmission path, and the existing topology of the relay network is more complicated, then the process of data transmission path selection will cause delays, which is the QoS of many services Important parameters required.

In this application, the path delay information of the data transmission path is obtained, so that the network element equipment performing the path selection can conveniently perform path selection according to the path delay information, thereby reducing the signaling overhead and path selection of the path selection. The complexity is described in the following through the embodiment corresponding to the method for acquiring path delay information for a 5G IAB network.

Referring to FIG. 5, an embodiment of the present application provides a method for acquiring path delay information, including

501. The first network element device generates delay detection information.

Exemplarily, the first network element device may be an RN connected to the terminal device, and the second network element device may be DgNB, or the first network element device may be DgNB, and the second network element device may be an RN connected to the terminal device. For example, as shown in Figure 1, if RN2 receives uplink data from UE1, RN2 needs to send uplink data to DgNB and send uplink data to the core network through DgNB. At this time, the first network element device is RN2, and the second The network element device is DgNB; if DgNB receives the downlink data of UE1 sent by the core network, DgNB needs to send the downlink data to RN2 connected to UE1, and then RN2 forwards the downlink data to UE1. At this time, DgNB is the first network element Device, RN2 serves as the second network element device.

502. The first network element device sends delay detection information to the second network element device through a transmission path, and the second network element device receives the delay detection information sent by the first network element device.

Exemplarily, the transmission path may be one, two, or more. Among them, one transmission path is suitable for a single multi-hop scenario. For example, as shown in FIG. 3, only RN2 is connected to the UE, and only one between RN2 and DgNB. Transmission path; two transmission paths are suitable for two multi-hop scenarios. For example, as shown in Figure 1, UE1 and UE2 are connected to RN2, and there are two transmission paths between RN2 and DgNB, which are RN2, RN1, DgNB, and RN2, RN4, RN3, DgNB; multiple transmission paths are suitable for multi-channel and multi-hop scenarios. In a multi-channel and multi-hop scenario, there are three or more transmission paths between DgNB and the RN connected to the terminal device.

Exemplarily, when the first network element device receives the data of the terminal device, the second network element device to which the data needs to be transmitted can be determined through a known network topology structure, thereby determining the transmission path.

Exemplarily, the first network element device is pre-configured with a transmission path with the second network element device. The first network element device can generate delay detection information for each transmission path, and the delay detection information includes a time stamp. The time stamp indicates the sending time when the first network element device sends the delay detection information.

For example, the intermediate RN (that is, the intermediate IAB node) in FIG. 5 does not need to update the time stamp when forwarding the delay detection information. When the second network element device receives the delay detection information, it can obtain the time by subtracting the time stamp from the reception time. Delay.

Exemplarily, the delay detection information may be sent as independent information together with the data; or the delay detection information also includes data and a time stamp.

Exemplarily, the first network element device sends the delay detection information to the second network element device. For example, as shown in Figure 1, suppose you need to know the path delay information of the transmission path between UE1 and DgNB. The first network element device is DgNB, and the second network element device is RN2. The transmission path includes two path1 and path2. The IAB nodes include DgNB, RN1, and RN2, and the IAB nodes passed by path2 include DgNB, RN3, RN4, and RN2. Among them, RN1, RN3, and RN4 are intermediate RNs in step 501.

503. The second network element device determines path delay information of the transmission path according to the delay detection information.

Exemplarily, since the time stamp included in the delay detection information indicates the sending time when the first network element device sends the delay detection information, when the second network element device receives the delay detection information, it can calculate The delay of the delay detection information transmitted on the transmission path, so as to obtain the path delay information of the transmission path. If the QCI information supported by the transmission path is not distinguished, the path delay information includes path information and delay information. The path information and QCI information are already associated, the path delay information includes the path information or path identifier of the transmission path, and the delay information. If the path information of the transmission path is not associated with the QCI information, the path delay information includes the path information or the path Identification, as well as delay and QCI information. If it is necessary to distinguish the QCI information supported by the transmission path, the path delay information expresses the delay when data with specific QoS requirements / carrying specific QCI information is transmitted on the transmission path. Optionally, a path identifier may be carried in the delay detection information, which is used to distinguish a path corresponding to any delay detection information in the multiple delay detection information when the second network element device receives multiple delay detection information. The QCI information may be a QCI identifier or a QoS requirement, and specific QoS requirements include a delay, a packet loss rate, a transmission rate, and the like; the path information may be any one of the following five path representation modes.

Exemplarily, a path or a transmission path or a data transmission path or a transmission path of delay detection information may be represented by a path identifier or path information. The specific content of the path information may be expressed by any of the following expressions:

1. A path can be represented by a network node on the path. As shown in Table 1, the path information of the path corresponding to the path identifier path1 is indicated by a node list (DgNB, RN1, RN2), and the path information of the path corresponding to the path identifier path2 is passed. List of nodes (DgNB, RN3, RN4, RN2);

Table 1

路径标识Path identifier	路径信息/节点列表Path information / node list
path1path1	DgNB,RN1，RN2DgNB, RN1, RN2
path2path2	DgNB,RN3，RN4，RN2DgNB, RN3, RN4, RN2

2. If the parent nodes of all RNs are the same DgNB, then the path can be represented only by the RN. As shown in Table 2, the path information of the path corresponding to the path identifier path1 is represented by the node list / RN list (RN1, RN2). The path / path information corresponding to the path identifier path2 is represented by a node list / RN list (RN3, RN4, RN2).

Table 2

路径标识Path identifier	路径信息/RN列表Path information / RN list
path1path1	RN1，RN2RN1, RN2
path2path2	RN3，RN4，RN2RN3, RN4, RN2

3. In addition, since the UE transmits data with the core network through the transmission path, the data is carried on the DRB of each RN, so the path can also be expressed by the DRB of the RN. As shown in Table 3, the path identifier path1 corresponds to The path information of the path is indicated by the DRB list (RN1, DRB1, RN2 and DRB2), and the path information of the path corresponding to the path identifier path2 is indicated by the DRB list (RN3, DRB1, RN4, DRB2, RN2 and DRB1);

table 3

路径标识Path identifier	路径信息/DRB列表Path information / DRB list
path1path1	RN1 DRB1，RN2 DRB2RN1 DRB1, RN2 DRB2
path2path2	RN3 DRB1，RN4 DRB2，RN2 DRB1RN3 DRB1, RN4 DRB2, RN2 DRB1

4. Since each RN DRB has a corresponding QoS requirement, the RN DRB transmitted UE DRB or the transmitted QoS DR carried by the DRB has corresponding QoS requirements. Therefore, a transmission path is actually directed to one or a group of QoS requirements or data transmission paths for one or a group of QCI. If the path is expressed by the DRB of the RN, it is also associated with the QoS requirements of the DRB. As shown in Table 4, the path information of the path corresponding to the path identifier path1 is indicated by the DRB list (RN1, DRB1, RN2, and DRB2). Associated with QCI information (RN DRB QCI1), the path information of the path corresponding to the path identifier path2 is associated with the QCI information (RN DRB QCI2) indicated by the DRB list (RN3 DRB1, RN4 DRB2, RN2 DRB1);

Table 4

5. If the path is associated with the QoS requirements of the UE, and the mapping relationship between the UE DRB and the RN DRB is known as shown in Table 5 below, when the path information is expressed by the DRB of the RN, it is also associated with the QoS requirements of the UE. As shown in Table 6, the path information of the path corresponding to the path identifier path1 is associated with the QCI information (UEDRBQCI1, UEDRB and QCI2) indicated by the DRB list (RN1, DRB1, RN2, DRB2), and the path corresponding to the path identifier path2 The path information is simultaneously associated with the QCI information (UE DRB QCI1) indicated by the DRB list (RN3 DRB1, RN4 DRB2, RN2 DRB1);

table 5

UE1 DRB 1(QCI 1)<->RN DRB 1(QCI 1)UE1 DRB 1 (QCI 1) <-> RN DRB 1 (QCI 1)
UE1 DRB 2(QCI 2)<->RN DRB 1(QCI 1)UE1 DRB 2 (QCI 2) <-> RN DRB 1 (QCI 1)
UE2 DRB 1(QCI 2)<->RN DRB 1(QCI 1)UE2 DRB 1 (QCI 2) <-> RN DRB 1 (QCI 1)
UE1 DRB 3(QCI 3)<->RN DRB 2(QCI 2)UE1 DRB 3 (QCI 3) <-> RN DRB 2 (QCI 2)

Table 6

Corresponding to the above five methods, the transmission path may specifically be: for 1, the transmission path is an RN node and a Donor node that forward data; for 2, the transmission path is an RN node that forwards data; for 3, the transmission path is forwarding The RN node of the data and its DRB; for 4, the transmission path is the RN node that forwards the data that meets the RN DRB granularity QoS requirements and its DRB; for 5, the transmission path is the RN node that forwards the data that meets the UE DRB granularity QoS requirements And its DRB. For the above manners 4 and 5, it can be expressed as that a path is associated with QCI information; or, a path identifier is associated with QCI information; or, path information is associated with QCI information.

It can be understood that the above-mentioned QCI information may also enable QCI information of QoS flow, for example, path information is associated with DRB and QCI of QoS flow. The corresponding transmission path is the RN node and its DRB that forward the data to meet the QoS requirements of QoS flow. It should be noted that the QCI, UE DRB, QCI, and RN DRB QCI of the above QoS flow, even though the QCI identification is the same, depends on the specific configuration of the operator or the agreement of the agreement, and can also correspond to different QoS requirements, such as different delay requirements , Different transmission rate requirements, different packet loss rate requirements, etc.

For example, during the data transmission, only the path identifier may be carried, and the intermediate RN node needs to obtain the foregoing five types of transmission path information corresponding to the path identifier in order to query the node or the DRB corresponding to the node for data forwarding according to the path identifier; It carries path information at the time, such as the above five path expressions, and the intermediate RN node can perform data forwarding according to the path information carried by the data.

Then for the expression of the above five paths, and the association of the path expression with the QCI information, the second network element device uses the path identifier (such as path1) of the transmission path, or the node list (such as DgNB, RN1, RN2), or The DRB information of each node (for example, RN3, DRB1, RN4, DRB2, and RN2 DRB1) can identify the transmission path and obtain the path identifier. If the path identifier is already associated with the QCI information, such as in the cases 4 and 5, the second network element device If the path identifier is obtained, the QCI information is determined. If the path identifier is not associated with the QCI information, such as in the case of 1, 2, and 3 above, the second network element device needs to extract the QCI information through the RN DRB, for example, through delay detection. The information or the QCI information carried by the data packet, therefore, the path identifier and / or QCI information of the transmission path is available to the second network element device. QoS requirements in 4G are indicated by QCI, and QoS in NR / 5G are indicated by 5QI (Quality Indentifier). Further, the QoS requirements in the NR can also be indicated by a QFI (QoS Flow Indentifier).

In the embodiment of the present application, when the first network element device receives the data of the terminal device, the second network element device that the data needs to reach may be determined through a known network topology structure, so as to determine the transmission path; or The transmission path between the first network element device and the second network element device. The first network element device generates delay detection information and sends the delay detection information to the second network element device through the transmission path. The detection information includes a timestamp indicating the sending time of the delay detection information. Then, the second network element device can determine the delay of the delay detection information according to the time stamp, thereby obtaining path delay information of the transmission path. During path selection, transmission path selection can be performed using path delay information, thereby reducing the signaling overhead and complexity of path selection.

It should be noted that when the first network element device is DgNB, step 504 in FIG. 5 needs to be performed, and the second network element device sends path delay information to the first network element device, so that the first network element device is in Path delay information can be used when performing transmission path selection.

Optionally, in the embodiment shown in FIG. 5 above, the transmission path may have two forms. One is to determine the transmission path through the QoS management and routing functions when the first network element device receives data from the terminal device. This transmission path is called a data transmission path; the second is that there is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission, but the QoS flow to which the data belongs only involves part of the QCI information, Does not cover all the QCI information that the network can support, then you need to configure a transmission path that meets the preset QCI information. There is no data transmission on this transmission path. It is only used to send delay detection information, which is called delay. The transmission path of the probe information.

The above two cases are respectively described below through embodiments.

(1) The transmission path is a data transmission path;

Referring to FIG. 6, an embodiment of the present application provides a method for acquiring path delay information, including:

601. The first network element device determines a data transmission path of a data packet to be transmitted.

Exemplarily, the first network element device may be a DgNB or an RN connected to a terminal device. When a data packet to be transmitted is received, the data packet to be transmitted may include the ID of the terminal device, and according to the known information of the first network element device, Network topology, such as the connection relationship between access nodes (DgNB and RN, RN and RN) and the connection relationship between UE and access node. If the first network element device is DgNB, you can determine the connection with the terminal device RN, so as to determine the transmission path between DgNB and RN as a data transmission path; if the first network element device is an RN connected to a terminal device, DgNB may be determined to determine the data transmission path between DgNB and RN.

Exemplarily, the transmission path may be associated with the QCI information. When the first network element device receives the data to be transmitted, it analyzes the QoS Flow of the data packets to be transmitted, so as to determine the QCI information of the data packets to be transmitted. The QCI information of the packet determines the transmission path as the data transmission path, that is, the data packet to be transmitted is sent through the transmission path.

602. The first network element device generates delay detection information.

In this implementation, after determining the data transmission path, the first network element device needs to perform delay detection for each data transmission path to obtain the delay of each data transmission path. Therefore, delay detection information needs to be generated. To enable the second network element device to obtain the delay of the data transmission path according to the delay detection information, it is necessary to record the sending time in the time stamp of the delay detection information at the time when the delay detection information is sent. The sending time when one network element device sends the delay detection information, then the second network element device can obtain the sending time of the delay detection information from the time stamp of the delay detection information.

603. The first network element device sends delay detection information to the second network element device through the data transmission path, and the second network element device receives the delay detection information sent by the first network device through the data transmission path.

In this implementation, after the data transmission path is determined by the first network element device and the delay detection information is generated, the delay detection information is sent to the second network element device through the data transmission path;

In an optional implementation manner of step 601 above, when the data transmission path is determined according to the QCI information of the data packet to be transmitted, the transmission path / data transmission path may also be associated with the QCI information. Some transmission paths / data transmission paths May only support QoS flow transmission with specific QoS requirements / carrying specific QCI information.

Exemplarily, the first network element device analyzes the QoS flow attributes of the data packet to be transmitted, such as the identity of the QoS flow, thereby determining the QCI information / QoS requirements of the data packet to be transmitted, and according to the QCI information of the data packet to be transmitted and the transmission path support. The QCI information determines the transmission path as the data transmission path. Assuming that the QCI information includes a QCI identifier, if the QCI identifier of a data packet to be transmitted is equal to the QCI identifier supported by the transmission path, the data packet can be transmitted on the transmission path. Assume that the QCI information includes a delay requirement. If the delay requirement corresponding to the data packet to be transmitted is equal to the delay requirement supported by the transmission path, the data packet can be transmitted on the transmission path. Filter the data transmission path for sending the delay detection information according to the QCI information of the data packet to be transmitted and the preset QCI condition. Assuming that the preset QCI condition includes that the QCI identifier is equal to the QCI supported by the data transmission path, delay detection is performed on the data transmission path, and then delay detection information is sent to the second network element device through the data transmission path. Assuming that the preset QCI condition includes a delay requirement, and the delay requirement of a data packet to be transmitted is equal to the delay requirement corresponding to the preset QCI condition, then a delay detection is performed on the data transmission path, and then the data transmission path is transmitted to The second network element device sends delay detection information.

Or, for example, the transmission path / data transmission path is already associated with QCI information, that is, if the data transmission path supports specific QCI information, the QCI information supported by the QCI information of the data packet to be transmitted / the data transmission path meets the preset QCI condition When delay detection is required for the data transmission path, delay detection information is sent to the second network element device through the data transmission path. In this way, the delay detection information can be sent when there is no data packet to be transmitted.

Exemplarily, before step 601, it is also necessary to obtain configuration information of delay detection information, such as path configuration information. The configuration information of the delay detection information includes preset QCI conditions, that is, delay detection information is sent only on paths that satisfy the preset QCI conditions. Assuming that the first network element is DgNB, the node can produce delay configuration information path configuration information; assuming that the first network element is an RN accessed by the terminal device, it is necessary to obtain the configuration information of delay detection information from DgNB.

In the 5G / NR IAB scenario, in order to reduce the protocol layer processing process when data packets to be transmitted are transmitted through the RN, L2Relay is introduced, and an adaptation layer is introduced between the PDCP layer and the RLC layer or the RLC layer and the MAC layer. Exemplarily, the data packet to be transmitted is forwarded in the form of PDCP / RLC / MAC PDU between multiple access nodes (DgNB or RN) in the data transmission path, and is processed by the Adaptation Layer during the forwarding. For example, DgNB or RN encapsulates the PDCP / RLC / MAC PDU into an adaptation layer protocol data unit (Adaptation Layer PDU). The Adaptation Layer is used to identify the terminal device and the DRB of the terminal device to which the data packet to be transmitted belongs when forwarding data between the RN and DgNB. When the first network element device sends the delay detection information to the second network element device through the data transmission path, the delay detection information is carried in the adaptation layer protocol data unit (Adaptation Layer PDU), and the delay detection information and the data to be transmitted can be transmitted. The packet is encapsulated into an adaptation layer protocol data unit, and the delay detection information (such as a timestamp) may be a control element, control information, or header of the adaptation layer protocol data unit formed when a data packet to be transmitted is transmitted, thereby The delay detection information is sent with the data packet to be transmitted; or, the delay detection information is a specific adaptation layer protocol data unit, and the adaptation layer protocol data unit includes a time stamp and the data packet to be transmitted, and the time stamp is used as the adaptation layer data. Control element in the packet, or control information or a field in the header; or, the PDU at the adaptation layer only contains delay detection information. Specifically, the time stamp is used as the control element, control information, or protocol data in the adaptation layer PDU. A field in the unit header is sent.

The following description is based on the expression of the delay detection information carried by the adaptation layer protocol data unit.

Exemplarily, when sending the delay detection information to the second network element device through the data transmission path, since the delay detection information is sent together with the data packets to be transmitted, if there are multiple data packets to be transmitted, or multiple transmissions When the same or different data packets are to be transmitted, a corresponding amount of delay detection information needs to be sent, which causes a waste of network resources. Therefore, the method of sending delay detection information needs to be improved. Specifically, the following two methods can be used:

The first way is to send delay detection information after sending a preset number of data packets;

Assume that the preset number of data packets is 4. When the first data packet to be transmitted is sent, the delay detection information is sent together with the first data packet to be transmitted, and the second to fifth data packets to be transmitted after that are transmitted. When the transmission data packet is sent, the delay detection information is not sent. When the sixth data packet to be transmitted is transmitted, the delay detection information is transmitted. After the seventh to tenth data packets to be transmitted are transmitted, all No delay detection information is sent. When the 11th packet to be transmitted is sent, the delay detection information is sent. The delay detection information is sent with the 6th and 11th data packets to be transmitted; or, the delay detection information can also be sent separately, that is, a separate adaptation layer is used when sending the 6th and 11th data with transmission Protocol data unit to send delay detection information.

The second method is to send delay detection information using a preset delay interval;

Assume that the sending interval of the data packet to be transmitted is 1 second (s), and the preset delay interval is 5s. When the first data packet to be transmitted is sent, the delay detection information is sent, and the second to When the fifth packet to be transmitted is sent, no delay detection information is sent. When the sixth packet to be transmitted is sent, the delay detection information is sent at an interval of 5s from the first packet to be transmitted. The delay detection information is sent with the sixth data packet to be transmitted; or, the delay detection information can also be sent separately, that is, a separate adaptation layer protocol data unit is used to send the delay detection when the sixth data to be transmitted is sent. information. Exemplarily, when there are no data packets to be transmitted after waiting for a preset time interval, the method of separately sending delay detection information can obtain path delay information in time without waiting for the arrival of the next data packet to be transmitted.

Exemplarily, before step 601, the configuration information of the delay detection information also needs to be obtained, for example, the configuration information is sent, and the configuration information is sent to configure the sending mode of the delay detection information. For the first mode, the configuration information of the sending mode includes a preset data amount sent by a data packet or a preset data amount interval, that is, delay detection information is sent after each preset number of data packets is sent. For the second mode, the sending mode configuration information includes a preset time interval.

604. The second network element device determines path delay information of the data transmission path according to the delay detection information.

In this embodiment, the adaptation layer data packet carries a path identifier or a node list during transmission, or the network nodes and DRBs of different nodes that have been experienced during the transmission are recorded in the header of the adaptation layer data packet. The second network element device can obtain the path information of the data transmission path and record the reception time when the adaptation layer data packet is received. In fact, it is the delay of receiving the detection information. Since the time stamp is the delay time of the first network element device sending Detect the sending time of the information, then subtract the sending time from the receiving time to obtain the delay information, associate the path information of the data transmission path with the corresponding delay information, and obtain the path delay information of each data transmission path. Further, it is necessary to obtain QCI information. If the delay detection information is sent together with the data packet, the QCI corresponding to the delay can be obtained by using the QCI information carried in the data packet or the QCI supported by the path sending the delay detection information. That is, the path delay information includes path information, delay information, and QCI information. Alternatively, the delay detection information includes preset QCI information, and the second network element device associates the path information of the data transmission path, the preset QCI information with the corresponding delay information, and obtains the path delay information of each data transmission path.

It should be noted that when the first network element device is DgNB and the second network element device is RN, step 605 in FIG. 6 needs to be performed, and the second network element device sends path delay information to the first network element. Device so that the first network element device can use the path delay information when performing the selection of the data transmission path.

(2) The transmission path is a transmission path of delay detection information.

Referring to FIG. 7, an embodiment of the present application provides a method for acquiring path delay information, including:

701. The first network element device acquires configuration information of delay detection information.

In this implementation, there is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission but the QoS of the data belongs to only part of the QCI information, and does not cover all the network support. For QCI information, then a transmission path that meets the preset QCI information needs to be configured. There is no data transmission on the transmission path, but it is only used to send delay detection information, which is called the transmission path of delay detection information. For example, in Figure 1, it is assumed that UE1 has no access; or UE1 has accessed but not transmitted data; or UE1 has data transmitted but the QoS flow to which the data belongs only involves QCI1, but actually UE1 data belongs to Qos Flow includes QCI1 and QCI2. If you need to perform delay statistics on the transmission path that meets QCI2 between UE1 and DgNB, then you need to pre-configure the transmission path (RN2, RN1, DgNB) that meets QCI2. A network element device obtains configuration information of delay detection information, which includes path configuration information, and the path configuration information is used to configure a transmission path that satisfies preset QCI information. The configuration information of the exemplary delay detection information further includes sending configuration information, and the sending configuration information is used to configure a sending manner of the delay detection information.

702. The first network element device determines a transmission path of the delay detection information according to the path configuration information, and determines a third transmission mode of the delay detection information according to the transmission configuration information.

In this implementation, the first network element device can determine the transmission path of the delay detection information according to the path configuration information, and determine the third transmission method of the delay detection information according to the transmission configuration information. The third transmission method may be a preset number for each transmission. The delay detection information is sent after the data packet of the packet, or the delay detection information may be sent by using a preset delay interval, which is not limited here.

703. The first network element device generates delay detection information.

In this implementation, since the delay detection information is not sent with the data packet when it is sent, different from the embodiment shown in FIG. 6, the second network element device cannot obtain the path information of the transmission path through the data packet, so , The delay detection information needs to include the transmission path of the delay detection information determined in step 702, and a time stamp indicating the sending time of the delay detection information. The transmission path of the delay detection information can be specifically preset the QCI information and The path identifier or path information is used to express the path information. For the expression of path information, refer to steps 1, 2, and 3 in step 503, or the transmission path of the delay detection information may be specifically indicated by the path identifier or path information. For the expression manner of the path information, refer to 4 and 5 in step 503.

704. The first network element device sends the delay detection information to the second network element device through the third transmission method and the transmission path of the delay detection information, and the second network element device receives the delay detection information.

In this embodiment, after generating the delay detection information, the first network element device sends the delay detection information through the Adaptation Layer, and sends the delay detection information through the Adaptation Layer PDU. The delay detection information is used as the adaptation layer protocol data. A field in the header of a unit, or as a control element in an adaptation layer probe packet. Because the third transmission method is used, delay detection information can be sent at a preset delay interval. For example, if the preset delay interval is 3s, then the first adaptation layer probe packet passes the delay detection information. After transmitting the transmission path to the second network element device, the second delay detection information is sent after 3s.

705. The second network element device determines path delay information of a transmission path of the delay detection information according to the delay detection information.

In this embodiment, when receiving the delay detection information, the second network element device records the reception time of the delay detection information, and analyzes the delay detection information to obtain the transmission path and time stamp of the delay detection information. Is the sending time of the delay detection information sent by the first network element device, then the delay time is obtained by subtracting the receiving time from the receiving time, and the transmission path of the delay detection information is associated with the delay information to obtain the path delay. information.

It should be noted that when the first network element device is a DgNB and the second network element device is an RN, step 706 in FIG. 7 also needs to be performed, and the second network element device sends path delay information to the first network element. Device, so that the first network element device can use path delay information when performing data transmission path selection after receiving data subsequently.

In the above two embodiments, the embodiment shown in FIG. 6 describes a scheme for sending delay detection information through a data transmission path to obtain path delay information, and carrying the delay detection information to a data packet to be transmitted to form an adaptation. Layer protocol data transmission, compared to sending delay detection information alone, reducing signaling overhead, for example; or, sending delay detection information separately, for the method based on the preset time interval in the second transmission method, there is no need to wait When the data packet to be transmitted arrives, the delay detection information can be sent in time. The embodiment shown in FIG. 7 describes a scheme in which the delay detection information is sent separately. It can still transmit data packets without specific QCI information. Obtain the path delay information of the transmission path.

In the embodiments shown in FIGS. 5, 6 and 7 above, if the first network element device is DgNB shown in FIG. 1 and the second network element device is RN2 shown in FIG. 1, then DgNB is selected as the transmission path. Decision maker, after RN2 obtains the path delay information, RN2 also needs to feed back the path delay information to DgNB for storage; if the first network element device is RN2 and the second network element device is DgNB, there is no need for path delay Information feedback. Therefore, when the first network element device is DgNB and the second network element device is RN in the embodiments shown in FIGS. 5, 6, and 7, after the second network element device obtains the path delay information, the path time needs to be adjusted. The delay information is sent to the first network element device. At this time, the path delay information includes the path identifier and / or QCI information and the delay information. The delay information may be a value obtained by subtracting the sending time from the receiving time of the delay detection information; Or on the premise that the first network element device saves the transmission time, the delay information may be the reception time of the delay detection information. The first network element device receives and saves the path delay information sent by the second network element device. If there are multiple transmission paths, RN2 obtains the delay information of each transmission path, and the path information and delay information of one transmission path are used as One group, then the path delay information is taken as a set, which has the delay information of multiple transmission paths. When RN2 sends the path delay information to DgNB, it can send immediate feedback after obtaining the path delay information. The path delay information can be sent to DgNB through the corresponding transmission path, or it can be sent to DgNB through other transmission paths. In consideration of the deletion of redundant information, a sequence number can be set for the path delay information. When DgNB receives multiple path delay information of the same sequence number, it only needs to save one path delay information of the sequence number, and other deletions can also be performed. After the path delay information is obtained, no immediate feedback is performed. Specifically, when the RN receives the uplink data of the terminal device, the path delay information and the uplink data are sent together.

It should be noted that the delay information in the path delay information is obtained by subtracting the receiving time from the sending time indicated by the timestamp. The delay information can also be the receiving time. The prerequisite is that DgNB needs to save the sending time. Then DgNB Delay information can be obtained based on the reception time.

Take the above-mentioned first network element device as DgNB and the second network element device as RN for example. After DgNB obtains the path delay information, if there is a new terminal device or new service, DgNB needs to use the path delay information. Configure bearers for new terminal equipment or new services. The following describes the feedback of path delay information and the use of path delay information to configure a bearer for a new terminal device or a new service through an embodiment. The specific steps are shown in FIG. 8.

801. The first network element device receives a bearer establishment request.

In this embodiment, taking FIG. 1 as an example, it is assumed that the path delay information of the QoS requirement of UE1 to be QCI1 has been obtained before. As shown in Table 7, the path delay information includes the path information and the delay information. The expression of the path information can be Through path identification, DRB list, and QCI information, when a new UE (UE2) or a new service of UE2 needs to be added, DgNB receives a bearer establishment request from the core network. The bearer establishment request information includes the UE ID (UE2), QFI And QoS requirements.

Table 7

路径标识Path identifier	DRB列表DRB List	QCI信息QCI Information	时延信息Delay information
path1path1	RN1 DRB1，RN2 DRB2RN1 DRB1, RN2 DRB2	UE DRB QCI1UE DRB QCI1	T1T1
path2path2	RN3 DRB1，RN4 DRB2，RN2 DRB1RN3 DRB1, RN4 DRB2, RN2 DRB1	UE DRB QCI1UE DRB QCI1	T2T2

802. The first network element device obtains a target transmission path according to a bearer establishment request and path delay information.

In this embodiment, DgNB can determine the RN2 connected to UE2 according to the local topology information, thereby obtaining two transmission paths path1 and path2, and determining the QCI information, for example, QCI1, then both path1 and path2 meet QCI1, and combined with the QoS requirements ( For example, the delay requirement), according to the delay information in Table 7, a target transmission path whose delay information meets the QoS requirements is selected from path1 and path2.

803. The first network element device sends the path information and the bearer establishment request of the target transmission path to the second network element device, and the second network element device receives the path information and the bearer establishment request of the target transmission path.

804. The second network element device allocates a terminal bearer identity to the terminal according to the bearer establishment request.

In this embodiment, the RN allocates a UE DRB identity to the UE according to the QFI in the terminal bearer establishment request, triggers a connection reconfiguration of the UE to add the UE DRB identity of the UE DRB.

805. The second network element device generates a bearer establishment response according to the bearer identifier and the path information of the target transmission path.

In this embodiment, after the RN configures the UE DRB for the UE, it associates the UE DRB identifier with the path information of the target transmission path to generate a bearer establishment response.

806. The second network element device sends a bearer establishment response to the first network element device, and the first network element device receives the bearer establishment response sent by the second network element device.

In this embodiment, the RN sends a bearer establishment response to DgNB. After DgNB receives the bearer establishment response sent by the RN, it completes the configuration of the terminal bearer.

In the embodiment of the present application, when path delay information has been obtained, when adding a new terminal device or a new service, the path delay information is used to select a transmission path that meets the QoS requirements of the new terminal device or new service, and The DRB of a new terminal device is established, thereby realizing multiplexing of transmission paths.

It should be noted that when downlink data is transmitted through a multiplexed transmission path, the downlink data sent by DgNB carries two types of information: one is path information, such as the path identifier or destination node identifier (RN2). The role of the path information is Data can be sent to RN2; the other is the DRB identification of the terminal device, such as the ID of the terminal device and the ID of the DRB of the terminal device. The ID of the DRB of the terminal device is used by RN2 to send the data through the DRB of the appropriate terminal device Send to the corresponding terminal device. The above two types of information can be carried in the Adaptation Layer PDU, such as the header of the PDU. When uplink data transmission is performed through the multiplexed transmission path, the terminal device completes the QoS management and puts QoS Flow into the DRB of the terminal device according to the configured QoS mapping criteria. After the RN receives data from a DRB of the terminal device, it The mapping relationship between DRB and path information, add path information, such as Path ID, or add information for path selection, such as destination node identification (DgNB), all or part of the node identification on the path, or even the Carry information such as identification. For uplink and downlink data transmission, if the forwarding node cannot identify the QCI of the data based on the path information, then the data transmission needs to carry the QCI information of the path in addition to the path identifier and the DRB ID of the terminal device.

The obtained path delay information can also be used to trigger the update of the network topology, allowing the RN to switch to higher-level nodes or even DgNB; it can also be used for routing updates, such as selecting a new transmission path that meets the QCI requirements for specific QCI data; or Trigger the UE to switch the access node (RN or DgNB). For example, when providing data transmission for the UE, the transmission of specific QCI data by the UE's current access RN exceeds the delay requirement corresponding to the QCI, and data transmission is performed by the neighboring RN. If the delay requirement corresponding to the QCI can be met, the UE can be switched to the neighboring cell RN.

The foregoing embodiment describes the method for acquiring path delay information. The following describes the network element device to which this method is applied by using an embodiment.

Referring to FIG. 9, an embodiment of the present application provides a first network element device, including:

A processing module 901, configured to generate delay detection information, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

The sending module 902 is configured to send the delay detection information generated by the processing module 901 to the second network element device through a transmission path, and the transmission path is used to indicate a multi-hop wireless backhaul between the first network element device and the second network element device. link.

In the embodiment of the present application, when the data of the terminal device is received, the second network element device that the data needs to reach may be determined through a known network topology structure, so as to determine the transmission path; or, it is pre-configured with the second network element device. Between transmission paths, the processing module 901 generates delay detection information. The delay detection information includes a time stamp. The time stamp indicates the sending time when the delay detection information is sent by the sending module 902. The sending module 902 processes the delay detection information through the transmission path. The delay detection information generated by the module 901 is sent to the second network element device. When the second network element device receives the delay detection information, the delay of the delay detection information can be determined according to the timestamp, thereby obtaining the path time of the transmission path. Delay information, in the subsequent path selection, the path delay information can be used to select the transmission path, thereby reducing the signaling overhead and complexity of path selection.

Optionally, in some embodiments of the present application, the transmission path includes a data transmission path or a transmission path of delay detection information.

In the embodiment of the present application, the transmission path may have two forms. One is to determine a transmission path through QoS management and routing functions when the first network element device receives data from the terminal device. This transmission path is called a data transmission path. Second, there is no terminal equipment access in the network, the terminal equipment has been accessed but data transmission has not been performed, or the terminal equipment has data transmission but the QoS of the data belongs to only part of the QCI information, and does not cover all the QCI that the network can support Information, then a transmission path that meets the preset QCI information needs to be configured. There may not be data transmission on this transmission path, but it is only used to send delay detection information, which is called the transmission path of delay detection information.

Optionally, in some embodiments of the present application,

The processing module 901 is further configured to determine a data transmission path of a data packet to be transmitted;

The sending module 902 is specifically configured to send the delay detection information to the second network element device through the data transmission path determined by the processing module 901.

In the embodiment of the present application, when a data packet to be transmitted is received, the data packet to be transmitted may include an ID of the terminal device, and then according to a network topology structure or topology information known to the first network element device, for example, between access nodes (DgNB With RN, between RN and RN), and between UE and access node, if the first network element device is DgNB, the RN connected to the terminal device can be determined to determine the transmission between DgNB and RN The path is used as a data transmission path; if the first network element device is an RN connected to the terminal device, DgNB may be determined, thereby determining a data transmission path between the DgNB and the RN. Therefore, the processing module 901 can determine the data transmission path of the data packet to be transmitted, and the sending module 902 can send the delay detection information to the second network element device through the data transmission path determined by the processing module 901.

Optionally, in some embodiments of the present application,

The processing module 901 is further configured to determine a data transmission path according to the QCI information of the data packet to be transmitted;

The sending module 902 is further configured to send the delay detection information to the second network element device through the data transmission path determined by the processing module 901 when the QCI information meets a preset QCI condition.

In the embodiments of the present application, the transmission path may be associated with QCI information. For example, the data transmission path supports transmission of data packets corresponding to QoS flows with specific QoS requirements / carrying specific QCI information. Then the processing module 901 acquires the QoS Flow attribute of the data packet to be transmitted, such as the identity of the QoS flow, thereby determining the QCI information / QoS requirements of the data packet to be transmitted, and determines the data transmission path according to the QCI information of the data packet to be transmitted. Assuming that the QCI information includes a QCI identifier, if the QCI identifier of a data packet to be transmitted is equal to the QCI identifier supported by the transmission path, the data packet can be transmitted on the transmission path. Assume that the QCI information includes a delay requirement. If the delay requirement corresponding to the data packet to be transmitted is equal to the delay requirement supported by the transmission path, the data packet can be transmitted on the transmission path. Filter the data transmission path for sending the delay detection information according to the QCI information of the data packet to be transmitted and the preset QCI condition. Assuming that the preset QCI condition includes that the QCI identifier is equal to the QCI supported by the data transmission path, delay detection is performed on the data transmission path, and then delay detection information is sent to the second network element device through the data transmission path. Assuming that the preset QCI condition includes a delay requirement, and the delay requirement of the data packet to be transmitted is equal to the delay requirement corresponding to the preset QCI condition, then the data transmission path is subjected to delay detection, and then the sending module 902 passes the processing module 901 The determined data transmission path sends delay detection information to the second network element device.

Optionally, in some embodiments of the present application,

The sending module 902 is further configured to send the delay detection information to the second network element device through the data transmission path in the first mode, where the first method includes sending the delay detection information after sending a preset number of data packets.

In the embodiment of the present application, the sending module 902 uses the first method and sends the delay detection information to the second network element device through the data transmission path. The first method includes sending the delay detection information after sending a preset number of data packets. The specific process is as follows: Assume that the preset number of data packets is 4. When the first data packet to be transmitted is sent, the delay detection information is sent together with the first data packet to be transmitted. When the 2nd to 5th data packets to be transmitted are sent, no delay detection information is sent, and when the 6th data packets to be transmitted are sent, the delay detection information is sent, and the 7th to 10th after this When the data packet to be transmitted is sent, no delay detection information is sent, and when the 11th data packet to be transmitted is sent, the delay detection information is sent. The delay detection information is sent with the 6th and 11th data packets to be transmitted; or, the delay detection information can also be sent separately, that is, a separate adaptation layer is used when sending the 6th and 11th data with transmission Protocol data unit to send delay detection information. By sending the delay detection information in the first manner, it is not necessary to send the delay detection information at the same time as each data packet to be transmitted, which can reduce the number of delay detection information transmissions and save network resources.

Optionally, in some embodiments of the present application,

The sending module 902 is further configured to send the delay detection information to the second network element device through a data transmission path in a second manner, where the second method includes sending the delay detection information by using a preset delay interval.

In the embodiment of the present application, the sending module 902 uses a second method and sends the delay detection information to the second network element device through a data transmission path. The second method includes sending the delay detection information by using a preset delay interval. The specific process is as follows: Assume that there are 6 data packets to be transmitted, the transmission time interval of the data packets to be transmitted is 1 second, and the preset delay interval is 5s. When the first data packet to be transmitted is sent, the transmission delay detection is performed. Information, after the second to fifth data packets to be transmitted are not sent, the delay detection information is not sent, and when the sixth data packet to be transmitted is sent, it is exactly the same as the time of the first data packet to be transmitted Every 5s, the delay detection information is sent, and the delay detection information is sent with the sixth data packet to be transmitted; or, the delay detection information can also be sent separately, that is, a separate adaptation is used when sending the sixth data to be transmitted. Layer protocol data unit to send delay detection information. Exemplarily, when there is no data packet to be transmitted after waiting for a preset time interval, the method of separately sending delay detection information can obtain path delay information in time without waiting for the arrival of the next data packet to be transmitted.

Optionally, in some embodiments of the present application,

The processing module 901 is further configured to obtain configuration information of the delay detection information, where the configuration information of the delay detection information includes path configuration information and transmission configuration information, and determine a transmission path of the delay detection information according to the path configuration information, and according to the transmission configuration The information determines a third sending mode of the delay detection information, and generates delay detection information, where the delay detection information includes a transmission path and a time stamp of the delay detection information;

The sending module 902 is specifically configured to send the delay detection information to the second network element device by using the third transmission method and the transmission path of the delay detection information.

In the embodiment of the present application, there is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission but the QoS flow to which the data belongs only involves part of the QCI information and does not cover the network support. All the QCI information of the device needs to be configured with a transmission path that satisfies the preset QCI information. There is no data transmission on the transmission path, but it is only used to send the delay detection information, which is called the transmission path of the delay detection information. For example, in Figure 1, it is assumed that UE1 has no access; or UE1 has accessed but not transmitted data; or UE1 has data transmitted but the QoS flow to which the data belongs only involves QCI1, but actually UE1 data belongs to Qos Flow includes QCI1 and QCI2. If you need to perform delay statistics on the transmission path that meets QCI2 between UE1 and DgNB, then you need to pre-configure the transmission path (RN2, RN1, DgNB) that meets QCI2, and process Module 901 obtains the configuration information of the delay detection information, including path configuration information and transmission configuration information. The path configuration information is used to configure a transmission path that satisfies preset QCI information, and the transmission configuration information is used to configure the transmission method of the delay detection information. The processing module 901 determines the transmission path of the delay detection information according to the path configuration information, and determines the third transmission mode of the delay detection information according to the transmission configuration information. The processing module 901 generates the delay detection information, and the delay detection information includes the delay detection information. Transmission path and time stamp, the sending module 902 uses the third sending method determined by the processing module 901, and Probe information transmission path delay block 901 determines the transmission delay of the probe information to the second network element device. Optionally, the third sending method includes sending the delay detection information by using a preset delay interval.

Referring to FIG. 10, an embodiment of the present application provides a second network element device, including:

The receiving module 1001 is configured to receive delay detection information sent by the first network element device, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

A processing module 1002 is configured to determine path delay information of a transmission path according to the delay detection information received by the receiving module 1001, and the transmission path is used to indicate a multi-hop backhaul link between the first network element device and the second network element device .

In the embodiment of the present application, the receiving module 1001 receives the delay detection information sent by the first network element device. The delay detection information includes a time stamp. The time stamp is used to indicate the sending time of the delay detection information. When detecting the information, after the processing module 1002 determines the transmission path, the delay can be determined according to the timestamp in the delay detection information, so as to obtain the path delay information of the transmission path. In the subsequent path selection, the path delay information can be used to perform The transmission path is selected, thereby reducing the signaling overhead and complexity of path selection.

In the embodiment of the present application, the transmission path may have two forms. One is to determine a transmission path through QoS management and routing functions when the first network element device receives data from the terminal device. This transmission path is called a data transmission path. Second, there is no terminal equipment access in the network, the terminal equipment has been accessed but data transmission has not been performed, or the terminal equipment has data transmission but the QoS of the data belongs to only part of the QCI information, and does not cover all the QCI that the network can support. Information, then a transmission path that meets the preset QCI information needs to be configured. There is no data transmission on the transmission path, but it is only used to send delay detection information, which is called the transmission path of delay detection information. The delay detection information can be used as a data packet to participate in scheduling at the MAC layer, and the preset QCI is used for the MAC layer scheduling.

Optionally, in some embodiments of the present application,

The receiving module 1001 is specifically configured to receive delay detection information sent by a first network device through a data transmission path. The data transmission path is a data transmission path of a data packet to be transmitted determined by the first network element device, and the data transmission path is the first network. The meta-device is determined according to the QCI information of the data packet to be transmitted.

In the embodiment of the present application, the data transmission path is determined by the first network element device according to the QCI information of the data packet to be transmitted, then the delay detection information sent by the first network element device through the data transmission path, and the receiving module 1001 receives the first Delay detection information sent by a network device through a data transmission path.

Optionally, in some embodiments of the present application,

The receiving module 1001 is further configured to receive the delay detection information sent by the first network element device through the first method and the data transmission path, where the first method includes sending the delay detection information after sending a preset number of data packets.

In the embodiment of the present application, the first network element device may use the first method and send the delay detection information through a data transmission path. The first method includes sending the delay detection information after sending a preset number of data packets, and then the receiving module 1001 receives delay detection information sent by a first network element device in a first mode and a data transmission path. By transmitting the delay detection information in the first manner, it is not necessary to send the delay detection information at the same time as each data packet to be transmitted, which can reduce the number of delay detection information transmissions and save network resources.

Optionally, in some embodiments of the present application,

The receiving module 1001 is further configured to receive the delay detection information sent by the first network element device through the second method and the data transmission path, where the second method includes sending the delay detection information by using a preset delay interval.

In the embodiment of the present application, the first network element device may use a second method and send delay detection information through a data transmission path. The second method includes sending the delay detection information using a preset delay interval, and then the receiving module 1001 receives Delay detection information sent by the first network element device through the second mode and the data transmission path. The second method is used to transmit the delay detection information. When there is no data packet to be transmitted after waiting for a preset time interval, the method of sending the delay detection information alone can obtain the path delay information in time without waiting for the next data packet to be transmitted. Arrival.

Optionally, in some embodiments of the present application,

The receiving module 1001 is specifically configured to receive the delay detection information sent by the first network element device through the third transmission method and the transmission path of the delay detection information. The third transmission method includes sending the delay detection information by using a preset delay interval. .

In the embodiment of the present application, there is no terminal equipment access in the network, the terminal equipment has been accessed but no data transmission has been performed, or the terminal equipment has data transmission but the QoS flow to which the data belongs only involves part of the QCI information and does not cover the network support. All the QCI information of the device needs to be configured with a transmission path that satisfies the preset QCI information. There is no data transmission on the transmission path, but it is only used to send the delay detection information, which is called the transmission path of the delay detection information. The first network element device sends the delay detection information through the transmission path of the delay detection information in the third transmission mode, and the receiving module 1001 receives the time when the first network element device sends the third detection method and the transmission path of the delay detection information. Delay detection information. The delay detection information is sent separately, and the path delay information of the transmission path can still be obtained in the case of data packet transmission without specific QCI information.

An embodiment of the present application provides a first network element device, and the first network element device has a function of realizing the behavior of the first network element device in the foregoing method. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

Optionally, referring to FIG. 11, the structure of the first network element device 1100 includes a processor 1110 and a transmitter 1130. The processor 1110 is configured to support the first network element device 1100 to perform corresponding functions in the foregoing method. The transmitter 1130 is configured to support communication between the first network element device and the second network element device, and send the delay detection information involved in the foregoing method to the second network element device. The first network element device 1100 may further include a memory 1150. The memory 1150 is configured to be coupled to the processor 1110, and stores program instructions and data necessary for the first network element device 1100.

A part of the memory 1150 may further include a non-volatile random access memory (NVRAM). The memory 1150 stores the following elements, executable modules or data structures, or a subset of them, or their extended set:

In the embodiment of the present application, a corresponding operation is performed by calling an operation instruction stored in the memory 1150 (the operation instruction may be stored in an operating system). The processor 1110 controls the operation of the network device 1100. The processor 1110 may also be referred to as a Central Processing Unit (CPU). The memory 1150 may include a read-only memory and a random access memory, and provide instructions and data to the processor 1110. A part of the memory 1150 may further include a non-volatile random access memory (NVRAM). In a specific application, various components of the network device 1100 are coupled together through a bus system 1120. The bus system 1120 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for the sake of clarity, various buses are marked as the bus system 1120 in the figure.

The method for acquiring path delay information disclosed in the embodiments of the present application may be applied to the processor 1110, or may be implemented by the processor 1110. The processor 1110 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1110 or an instruction in the form of software. The aforementioned processor 1110 may be a general-purpose processor 1110, a digital signal processor 1110 (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, Discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor 1110 may be a microprocessor 1110 or the processor 1110 may be any conventional processor 1110 or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly implemented and executed by the hardware decoding processor 1110, or may be executed and completed by using a combination of hardware and software modules in the decoding processor 1110. A software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory 1150, and the processor 1110 reads the information in the memory 1150 and completes the steps of the foregoing method in combination with its hardware.

An embodiment of the present application provides a second network element device, and the second network element device has a function of realizing the behavior of the second network element device in the foregoing method. The functions may be implemented by hardware, and may also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

Optionally, referring to FIG. 12, the structure of the second network element device 1200 includes a receiver 1230 and a processor 1210. The receiver 1230 is configured to support the second network element device 1200 when receiving the first network element device. Delay detection information. The processor 1210 controls the second network element device 1200 to determine the path delay information of the transmission path according to the delay detection information received by the receiver 1230. The second network element device 1200 may further include a memory 1250. The memory 1250 is configured to be coupled to the processor 1210, and stores program instructions and data necessary for the second network element device 1200.

A part of the memory 1250 may further include a non-volatile random access memory (NVRAM). The memory 1250 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

In the embodiment of the present application, a corresponding operation is performed by calling an operation instruction stored in the memory 1250 (the operation instruction may be stored in an operating system). The processor 1210 controls operations of the network device 1200, and the processor 1210 may also be referred to as a Central Processing Unit (CPU). The memory 1250 may include a read-only memory and a random access memory, and provide instructions and data to the processor 1210. A part of the memory 1250 may further include a non-volatile random access memory (NVRAM). In a specific application, various components of the network device 1200 are coupled together through a bus system 1220. The bus system 1220 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for the sake of clarity, various buses are marked as the bus system 1220 in the figure.

The method for acquiring path delay information disclosed in the embodiments of the present application may be applied to the processor 1210, or may be implemented by the processor 1210. The processor 1210 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1210 or an instruction in the form of software. The above processor 1210 may be a general purpose processor 1210, a digital signal processor 1210 (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, Discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor 1210 may be a microprocessor 1210 or the processor 1210 may be any conventional processor 1210 or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as completion of execution by the hardware decoding processor 1210, or may be performed by using a combination of hardware and software modules in the decoding processor 1210. The software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory 1250, and the processor 1210 reads the information in the memory 1250 and completes the steps of the foregoing method in combination with its hardware.

FIG. 13 is a schematic structural diagram of a chip system 1300 according to an embodiment of the present application. The chip system 1300 includes at least one processor 1310 and an interface circuit 1330, and the interface circuit 1330 and the at least one processor 1310 are interconnected through a line.

Optionally, as shown in FIG. 13, in some embodiments of the present application, the chip system 1300 further includes: a memory 1350; the memory 1350 may include a read-only memory and a random access memory, and provide the processor 1310 with operation instructions and data. A part of the memory 1350 may further include a non-volatile random access memory (NVRAM).

In some implementations, the memory 1350 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

In the embodiment of the present application, a corresponding operation is performed by calling an operation instruction stored in the memory 1350 (the operation instruction may be stored in an operating system).

The processor 1310 controls operations of the network element device. The processor 1310 may also be referred to as a CPU (Central Processing Unit). The memory 1350 may include a read-only memory and a random access memory, and provide instructions and data to the processor 1310. A part of the memory 1350 may further include a non-volatile random access memory (NVRAM). In specific applications, various components are coupled together through a bus system 1320. The bus system 1320 may include a power bus, a control bus, and a status signal bus in addition to a data bus. However, for the sake of clarity, various buses are marked as the bus system 1320 in the figure.

The method disclosed in the embodiments of the present application may be applied to the processor 1310, or implemented by the processor 1310. The processor 1310 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by using an integrated logic circuit of hardware in the processor 1310 or an instruction in the form of software. The above processor 1310 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, and discrete hardware. Components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly implemented by a hardware decoding processor, or may be performed by using a combination of hardware and software modules in the decoding processor. A software module may be located in a mature storage medium such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory 1350, and the processor 1310 reads information in the memory 1350 and completes the steps of the foregoing method in combination with its hardware.

In the above embodiments, the instructions stored in the memory for execution by the processor may be implemented in the form of a computer program product. The computer program product may be written in the memory in advance, or may be downloaded and installed in the memory in the form of software.

The present application also provides a computer-readable storage medium. The computer-readable storage medium has instructions stored therein, which when run on a computer, cause the computer to execute the method for acquiring path delay information described in the above embodiments.

The present application also provides a computer program product containing instructions, which when executed on a computer, causes the computer to execute the method for acquiring path delay information described in the above embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are wholly or partially generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server, or data center Transmission via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, a data center, and the like that includes one or more available medium integration. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.

It should be understood that, in the various embodiments of the present application, the size of the sequence numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present application. The implementation process constitutes any limitation.

As mentioned above, the above embodiments are only used to describe the technical solution of the present application, rather than limiting the present invention. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still interpret the foregoing. The technical solutions described in the embodiments are modified, or some technical features are equivalently replaced; and these modifications or replacements do not deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

A method for acquiring path delay information is characterized in that it includes:

The first network element device generates delay detection information, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

The first network element device sends the delay detection information to a second network element device through a transmission path, and the transmission path is used to indicate a multi-hop between the first network element device and the second network element device. Wireless backhaul link.
The method according to claim 1, wherein the transmission path comprises a data transmission path or a transmission path of the delay detection information.
The method according to claim 2, comprising:

Determining, by the first network element device, a data transmission path of a data packet to be transmitted;

The sending, by the first network element device, the delay detection information to the second network element device through a transmission path includes:

Sending, by the first network element device, the delay detection information to a second network element device through the data transmission path.
The method according to claim 3, wherein the determining, by the first network element device, a data transmission path of a data packet to be transmitted comprises:

Determining, by the first network element device, a data transmission path according to the service quality level identifier QCI information of a data packet to be transmitted;

The sending, by the first network element device, the delay detection information to the second network element device through a transmission path includes:

When the QCI information meets a preset QCI condition, the first network element device sends the delay detection information to a second network element device through the data transmission path.
The method according to any one of claims 2 to 4, wherein the sending, by the first network element device, the delay detection information to the second network element device through the data transmission path comprises:

The first network element device adopts a first method and sends the delay detection information to a second network element device through the data transmission path, where the first method includes every time a preset number of data packets are sent. Sending the delay detection information.
The method according to any one of claims 2 to 4, wherein the sending, by the first network element device, the delay detection information to the second network element device through the data transmission path comprises:

The first network element device adopts a second method and sends the delay detection information to the second network element device through the data transmission path, wherein the second method includes using a preset delay interval. Sending the delay detection information.
The method according to claim 1, comprising:

The first network element device obtains configuration information of delay detection information, where the configuration information of the delay detection information includes path configuration information and transmission configuration information;

Determining, by the first network element device, a transmission path of the delay detection information according to the path configuration information, and determining a third transmission manner of the delay detection information according to the transmission configuration information;

The delay detection information generated by the first network element device includes:

Generating delay detection information by the first network element device, where the delay detection information includes a transmission path of the delay detection information and the timestamp;

The sending, by the first network element device, the delay detection information to the second network element device through a transmission path includes:

The first network element device uses the third sending mode and sends the delay detection information to the second network element device through a transmission path of the delay detection information.
The method according to claim 7, wherein the third sending mode comprises sending the delay detection information by using a preset delay interval.
A method for acquiring path delay information is characterized in that it includes:

Receiving, by the second network element device, delay detection information sent by the first network element device, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

Determining, by the second network element device, path delay information of a transmission path according to the delay detection information, where the transmission path is used to indicate a multi-hop between the first network element device and the second network element device Backhaul link.
The method according to claim 9, wherein the transmission path comprises a data transmission path or a transmission path of the delay detection information.
The method according to claim 10, wherein the receiving, by the second network element device, the delay detection information sent by the first network element device comprises:

Receiving, by the second network element device, the delay detection information sent by the first network device through a data transmission path, where the data transmission path is a data transmission path of a data packet to be transmitted determined by the first network element device The data transmission path is determined by the first network element device according to the service quality level identifier QCI information of the data packet to be transmitted.
The method according to claim 10 or 11, wherein the receiving, by the second network element device, the delay detection information sent by the first network device through a data transmission path comprises:

Receiving, by the second network element device, the delay detection information sent by the first network element device through a first mode and a data transmission path, wherein the first mode includes sending after sending a preset number of data packets The delay detection information.
The method according to claim 10 or 11, wherein the receiving, by the second network element device, the delay detection information sent by the first network device through a data transmission path comprises:

Receiving, by the second network element device, the delay detection information sent by the first network element device through a second mode and a data transmission path, wherein the second mode includes sending the delay using a preset delay interval Delay detection information.
The method according to claim 9, wherein the receiving, by the second network element device, the delay detection information sent by the first network element device comprises:

Receiving, by the second network element device, the delay detection information sent by the first network element device through a third transmission method and a transmission path of the delay detection information, and the third transmission method includes using a preset delay The delay detection information is sent at intervals.
The first network element device includes:

A processing module, configured to generate delay detection information, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

A sending module, configured to send the delay detection information generated by the processing module to a second network element device through a transmission path, and the transmission path is used to indicate the first network element device and the second network element device Multi-hop wireless backhaul link.
The first network element device according to claim 15, wherein the transmission path comprises a data transmission path or a transmission path of the delay detection information.
The first network element device according to claim 16, wherein:

The processing module is further configured to determine a data transmission path of a data packet to be transmitted;

The sending module is specifically configured to send the delay detection information to the second network element device through a data transmission path determined by the processing module.
The first network element device according to claim 17, wherein:

The processing module is further configured to determine a data transmission path according to the service quality level identifier QCI information of the data packet to be transmitted;

The sending module is further configured to send the delay detection information to a second network element device through the data transmission path determined by the processing module when the QCI information meets a preset QCI condition.
The first network element device according to any one of claims 16 to 18, wherein

The sending module is further configured to send the delay detection information to a second network element device through the data transmission path in a first manner, wherein the first manner includes sending a preset number of data packets each time. And sending the delay detection information later.
The first network element device according to any one of claims 16 to 18, wherein

The sending module is further configured to send the delay detection information to the second network element device through the data transmission path in a second manner, where the second manner includes using a preset delay The delay detection information is sent at intervals.
The first network element device according to claim 15, wherein:

The processing module is further configured to obtain configuration information of the delay detection information, wherein the configuration information of the delay detection information includes path configuration information and transmission configuration information, and the delay detection information is determined according to the path configuration information. A transmission path of the transmission path, determining a third transmission mode of the delay detection information according to the transmission configuration information, and generating delay detection information, where the delay detection information includes a transmission path of the delay detection information and the time stamp;

The sending module is specifically configured to send the delay detection information to the second by using the third sending method determined by the processing module and the transmission path of the delay detection information determined by the processing module. Network element equipment.
The first network element device according to claim 21, wherein the third sending mode comprises sending the delay detection information by using a preset delay interval.
The second network element device includes:

A receiving module, configured to receive delay detection information sent by a first network element device, where the delay detection information includes a time stamp, and the time stamp is used to indicate a sending time of the delay detection information;

A processing module, configured to determine path delay information of a transmission path according to the delay detection information received by the receiving module, where the transmission path is used to indicate that there are many Hopped backhaul link.
The second network element device according to claim 23, wherein the transmission path comprises a data transmission path or a transmission path of the delay detection information.
The second network element device according to claim 24, wherein

The receiving module is specifically configured to receive the delay detection information sent by the first network device through a data transmission path, where the data transmission path is data transmission of a data packet to be transmitted determined by the first network element device And the data transmission path is determined by the first network element device according to the quality of service level identifier QCI information of the data packet to be transmitted.
The second network element device according to claim 24 or 25, wherein:

The receiving module is further configured to receive the delay detection information sent by the first network element device through a first manner and a data transmission path, where the first manner includes every time a preset number of data packets are sent. Sending the delay detection information.
The second network element device according to claim 24 or 25, wherein:

The receiving module is further configured to receive the delay detection information sent by the first network element device through a second method and a data transmission path, where the second method includes sending the delay detection information using a preset delay interval The delay detection information is described.
The second network element device according to claim 23, wherein:

The receiving module is specifically configured to receive the delay detection information sent by the first network element device through a third transmission method and a transmission path of the delay detection information, and the third transmission method includes using a preset time The delay detection information is transmitted at a delay interval.
A computer-readable storage medium, characterized in that: it is applied to a first network element device, and the computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute claims Operation of the first network element device described in 15-22.
A computer-readable storage medium, characterized in that: it is applied to a second network element device, and the computer-readable storage medium stores instructions that, when run on a computer, cause the computer to execute claims Operation of the second network element device described in 23-28.