CN111107634B

CN111107634B - Data transmission method and device for wireless backhaul network

Info

Publication number: CN111107634B
Application number: CN201811267452.0A
Authority: CN
Inventors: 卓义斌; 朱元萍; 刘菁; 戴明增
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-10-29
Filing date: 2018-10-29
Publication date: 2022-12-30
Anticipated expiration: 2038-10-29
Also published as: CN111107634A; WO2020088253A1

Abstract

The application provides a data transmission method and device of a wireless backhaul network. In the method, a first node determines a remaining packet delay budget representing a delay requirement for a first packet to be transmitted from the first node to a host node, and transmits the first packet according to the remaining packet delay budget of the first packet. Because the remaining data packet delay budget of the first data packet can relatively accurately represent the transmission attribute of the first data packet between the first node and the host node, the first node transmits the data packet through the determined remaining data packet delay budget of the first data packet, and the transmission performance of data can be effectively improved.

Description

Data transmission method and device for wireless backhaul network

Technical Field

The present application relates to the field of communications, and more particularly, to a method and an apparatus for data transmission in a wireless backhaul network in the field of communications.

Background

A wireless backhaul network, such as an Integrated Access and Backhaul (IAB) network, includes a host node and a wireless backhaul node, and a terminal device is connected to the host node through the wireless backhaul node. IAB networks support multi-hop and multi-connection networking, and therefore, multiple transmission paths may exist between the terminal device and the host node. On a certain transmission path, there is a certain hierarchical relationship between a terminal device and a wireless backhaul node providing wireless access service for the terminal device, between wireless backhaul nodes, between a wireless backhaul node and a host node providing backhaul service for the wireless backhaul node, wherein a node providing backhaul service for a wireless backhaul node is referred to as the wireless backhaul node or a parent node of the terminal device, or a node providing access service for a terminal device is referred to as a parent node of the terminal device, a wireless backhaul node can be regarded as a child node of the parent node of the wireless backhaul node, and a terminal device can be regarded as a child node of the parent node of the terminal device.

In uplink transmission of the IAB network, a parent node schedules transmission resources for a child node, and the child node transmits data to the parent node. The method comprises the steps that a child node maps data to be transmitted to at least one Data Radio Bearer (DRB) based on quality of service (QoS) of the data to be transmitted, wherein the at least one DRB corresponds to at least one logical channel, and generally, one DRB corresponds to one logical channel; the child node reports the data amount in the at least one logical channel to a parent node of the child node through a Buffer Status Report (BSR) to request a transmission resource, and the parent node schedules the transmission resource for the child node. In the case where the transmission resource is limited, the child node may selectively prioritize data in a logical channel having a higher priority according to the priority of each logical channel and the like. In addition, if the parent node is connected to a plurality of child nodes including the child node, and the plurality of child nodes simultaneously request transmission resources from the parent node, the parent node may determine which child nodes to schedule transmission resources preferentially according to the priority (e.g., data-based QoS) of data of the plurality of child nodes.

In summary, the QoS of data needs to be considered whether the child node determines which data is to be preferentially processed or whether the parent node determines which child node is to be preferentially scheduled with transmission resources. However, some of the QoS parameters characterizing the data represent parameter requirements between the terminal device and the host node or between the terminal device and the user plane function elements in the core network, for example, the packet delay budget represents the delay requirements of the packet between the terminal device and the user plane function elements in the core network. In the IAB network, at least one wireless backhaul node exists between most of the terminal devices and the host node, and no matter which data is preferentially processed by the child node based on the existing QoS parameters, or the resource is scheduled by the parent node of the child node based on the existing QoS parameters, so that the final result may be inaccurate, and the transmission performance of the data is affected.

Therefore, it is desirable to provide a technique that can effectively improve the data transmission performance.

Disclosure of Invention

The application provides a data transmission method and device for a wireless backhaul network, which can effectively improve the data transmission performance.

In a first aspect, a data transmission method for a wireless backhaul network comprising at least one wireless backhaul node and a host node is provided, the method comprising:

a first node determines a first parameter of a first data packet, where the first parameter of the first data packet includes a remaining data packet delay budget of the first data packet, the first node is any one of a terminal-side device or the at least one wireless backhaul node, and the remaining data packet delay budget of the first data packet is a delay requirement for the first data packet to be transmitted from the first node to the host node;

and the first node sends the first data packet to a father node of the first node according to the first parameter of the first data packet.

Therefore, in the data transmission method for the wireless backhaul network according to the embodiment of the present application, the remaining packet delay budget of a data packet (e.g., a first data packet) indicates a delay requirement that the data packet is transmitted between a node (e.g., a first node) that currently needs to transmit the data packet and a host node, and is not completely a delay requirement in the prior art that the data packet is transmitted between the terminal device and a user plane function network element in a core network, which can relatively accurately characterize a transmission attribute of the data packet between the node and the host node, and therefore, the node transmits the data packet through the determined remaining packet delay budget of the data packet, which can effectively improve data transmission performance.

With reference to the first aspect, in certain implementations of the first aspect, the sending, by the first node, the first packet to a parent node of the first node according to the first parameter of the first packet includes:

the first node maps the first data packet on a first Data Radio Bearer (DRB) corresponding to a first parameter of the first data packet;

the first node sends the first data packet on the first DRB.

In this embodiment of the present application, a first parameter of a plurality of data packets has a corresponding relationship with a plurality of DRBs, the first parameter of one data packet has one value of the first parameter, that is, a plurality of values of the first parameter have a corresponding relationship with the plurality of DRBs, each value of the first parameter corresponds to each DRB, and before the first node sends the first data packet, the first node may determine, according to the first parameter of the first data packet, a DRB (denoted as a first DRB) corresponding to the first parameter of the first data packet from the corresponding relationship between the plurality of values of the first parameter and the plurality of DRBs, so that the first node sends the first data packet on the first DRB.

Alternatively, the DRB may be indicated by an identity for identifying the DRB.

Therefore, the correspondence between the values of the first parameter and the DRBs can be represented by the correspondence between the values of the first parameter and the identities of the DRBs.

In the data transmission method for the wireless backhaul network according to the embodiment of the present application, because QoS requirements (e.g., PDB requirements or PER requirements) corresponding to data packets transmitted by a node (e.g., a first node) on a current link are close to each other, so that data packets having similar QoS requirements in each DRB are guaranteed to be processed identically in a data transmission process, and it is avoided that a service with a certain low delay or high reliability requirement in the DRB affects transmission performance of other data, and in addition, because a first parameter can relatively accurately represent a transmission attribute of the data packet between the node and the host node, the node further determines a DRB (e.g., a first DRB) corresponding to the data packet according to the first parameter of the data packet (e.g., the first data packet), maps the data packet on the corresponding DRB, and further sends the data packet on the DRB, so that the transmission performance of the data can be further effectively improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes:

the first node receives correspondence information from a parent node or a host node of the first node, where the correspondence information is used to indicate a correspondence between a first parameter of the first packet and the first DRB.

If the host node sends the corresponding relationship information and other wireless backhaul nodes exist between the first node and the host node, the other wireless backhaul nodes can forward or transmit the corresponding relationship information to the first node. The other wireless backhaul node is a superior node of the first node (e.g., a parent node of the first node, or a parent node of the first node parent node).

In addition, the correspondence information may include not only the correspondence between the first parameter of the first data packet and the first DRB, but also the correspondence between other values of the first parameter and the DRBs, that is, the correspondence information may include the correspondence between a plurality of values of the first parameter and a plurality of DRBs.

the first node determines the priority of a first logical channel according to a first parameter of the first data packet, wherein the first data packet corresponds to the first logical channel;

and the first node transmits the first data packet according to the priority of the first logical channel.

In this embodiment of the present application, the first node determines a corresponding DRB according to the QoS parameter of the first data packet, determines a corresponding first logical channel according to the DRB, and determines the priority of the first logical channel according to the first parameter of the first data packet, so as to send the first data packet according to the priority of the first logical channel.

Optionally, when the first parameter includes the remaining PDBs, the priority of the logical channel corresponding to the data packet of the remaining PDBs with the larger value is lower, and the priority of the logical channel corresponding to the data packet of the remaining PDBs with the smaller value is higher.

Optionally, when the first parameter includes the remaining hop count, the priority of the logical channel corresponding to the data packet with the larger value of the remaining hop count is higher, and the priority of the logical channel corresponding to the data packet with the smaller value of the remaining hop count is lower.

Optionally, when the first parameter includes the remaining PDB and the remaining hop count, the priority of the logical channel corresponding to the data packet with the larger value in the ratio of the remaining PDB to the remaining hop count is lower, and the priority of the logical channel corresponding to the data packet with the smaller value in the ratio of the remaining PDB to the remaining hop count is higher.

In the data transmission method for the wireless backhaul network according to the embodiment of the present application, because the priority of the logical channel can accurately represent the QoS requirement (e.g., the delay requirement) of the data to be transmitted on the node (e.g., the first node), and in addition, the first parameter can accurately represent the transmission attribute of the data packet between the node and the host node, the node determines the priority of the logical channel (e.g., the first logical channel) corresponding to the data packet according to the first parameter of the data packet (e.g., the first data packet), and further, sends the data packet according to the priority of the first logical channel, which can further effectively improve the transmission performance of the data.

With reference to the first aspect, in certain implementations of the first aspect, the first parameter of the first packet further includes a hop count of a first transmission path, where the hop count of the first transmission path is a number of nodes through which the first packet passes during being transmitted on the first transmission path, and the first transmission path is a transmission path between the first node and the host node, where the transmission path starts from the first node and ends at the host node.

The hop count on the first transmission path can represent the distance between the first node and the host node or between the first node and the terminal device.

In the embodiments of the present application, there are various explanations for the hop count of the first transmission path. Assuming that the number of the wireless backhaul nodes between the first node and the host node is N, the hop count of the first transmission path may be N, the sum of N +1 of the number of the wireless backhaul nodes between the first node and the host node and the first node, or N +2 of the number of the first node, the host node and the wireless backhaul nodes between the first node and the host node, which is not limited in this embodiment.

Optionally, the hop count of the first transmission path is the number of transmission links through which the first data packet passes during transmission on the first transmission path.

Wherein, a transmission link represents a link between two adjacent nodes, and the number of transmission links included in the first transmission path may also represent the hop count of the first transmission path.

In the data transmission method for the wireless backhaul network according to the embodiment of the present application, since the hop count of the data packet (e.g., the first data packet) on a certain transmission path (e.g., the first transmission path) can represent the distance between the node and the host node, and can relatively accurately represent the transmission attribute of the data packet between the node and the host node, the node further determines the hop count of the data packet on the transmission path, and sends the data packet based on the hop count on the transmission path, so that the transmission performance of data can be more effectively improved.

With reference to the first aspect, in certain implementations of the first aspect, the hop count of the first transmission path is configured by the host node for the first node.

With reference to the first aspect, in certain implementations of the first aspect, the first node is any one of the at least one wireless backhaul node; and, the method further comprises:

the first node receives a first message from a child node of the first node, where the first message includes information indicating a hop count, where the hop count in the first message is a hop count of the first transmission path, or the hop count in the first message is a number of nodes through which the first packet is transmitted on a second transmission path, where the second transmission path is a transmission path between the child node of the first node and the host node, where the transmission path starts from the child node of the first node and ends at the host node; and the number of the first and second groups,

the first node determining a first parameter of a first packet, comprising:

and the first node determines the hop count of the first transmission path according to the first message.

With reference to the first aspect, in certain implementations of the first aspect, the first node is any one of the at least one wireless backhaul node; and the number of the first and second groups,

the first node determining a first parameter of a first packet, comprising:

the first node receives a second message from a child node of the first node, where the second message is used to determine a remaining packet delay budget for the first packet.

With reference to the first aspect, in certain implementations of the first aspect, the second message includes time information and latency information, where the time information is used to indicate a time when the first data packet is received by a child node of the first node or a time when the first data packet is sent, and the latency information is used to indicate a latency requirement for the first data packet to be transmitted from the child node of the first node to the host node.

With reference to the first aspect, in certain implementations of the first aspect, the second message includes information indicating a time when the terminal-side device sent the first data packet.

the first node sends a third message to a parent node of the first node, the third message including information characterizing the first parameter of the first packet.

The first parameter of the first packet may reflect a priority of a logical channel corresponding to the first packet.

When the first parameter includes a plurality of parameters, the information for characterizing the first parameter may also include a quantization parameter quantized based on the plurality of parameters, and the quantization parameter may comprehensively characterize the first parameter.

Optionally, the third message further includes information indicating a data amount of a group of logical channels, where the group of logical channels includes a logical channel corresponding to the first data packet and logical channels corresponding to other data packets.

Optionally, the third message further includes the first parameter of each of the other data packets in the set of logical channels except the first data packet.

Optionally, the third information may be a Buffer Status Report (BSR).

Optionally, when the first node has multiple groups of logical channels, the third message may further include information of the data amount of each group of logical channels in the multiple groups of logical channels. In this case, the third message may further include the first parameter of each data packet in each of the plurality of groups of logical channels.

Optionally, when the first node determines that the first parameter of the first data packet is lower than the preset threshold, the first node may preferentially trigger an action of sending a third message of a logical channel group to which a logical channel corresponding to the first data packet belongs, so that a parent node of the first node may schedule a transmission resource for the first node in advance.

Therefore, in the data transmission method using the wireless backhaul network according to the embodiment of the present application, the node (e.g., the first node) reports the first parameter of the data packet (e.g., the first data packet) to the parent node of the node, so that the parent node of the node can schedule the transmission resource for the node according to the first parameter of the data packet, thereby optimizing an uplink scheduling manner, effectively improving accuracy of uplink scheduling, and further improving transmission performance of data.

With reference to the first aspect, in certain implementations of the first aspect, the first parameter of the first packet further includes: the unit packet loss rate of a first data packet represents the packet loss rate of the first data packet between two adjacent nodes.

The packet loss rate represents the upper limit of the ratio of the number of incorrectly transmitted data packets to the transmission data group. In addition, the two adjacent nodes may be any two adjacent nodes in the wireless backhaul network, one of the two adjacent nodes is a child node, and the other node is a parent node of the child node.

Therefore, in the data transmission method for the wireless backhaul network according to the embodiment of the present application, the unit packet loss rate of the data packet (e.g., the first data packet) indicates the packet loss rate at which the data packet is transmitted between two adjacent nodes, and is not completely the packet loss rate indicating that the data packet is transmitted between the terminal device and the host node in the prior art, which can more accurately represent the transmission attribute of the data packet between the two adjacent nodes, so that the node (e.g., the first node) sends the data packet according to the determined unit packet loss rate of the data packet, and can effectively improve the transmission performance of data.

In a second aspect, a data transmission method for a wireless backhaul network comprising at least one wireless backhaul node and a host node is provided, the method comprising:

a parent node of a first node receiving a third message from the first node, the third message including information characterizing first parameters of a first data packet, the first parameters of the first data packet including a remaining packet delay budget of the first data packet, the first node being either a terminal side device or any of the at least one wireless backhaul node, the remaining packet delay budget of the first data packet being a delay requirement for the first data packet to be transmitted from the first node to the host node;

a father node of the first node schedules a transmission resource for the first node according to the third message;

a parent node of the first node receives the first data packet from the first node on the transmission resource.

In this embodiment, when a first node reports a plurality of data packets to be transmitted, including the first data packet, a parent node of the first node not only schedules transmission resources according to a first parameter of the first data packet, but also schedules transmission resources for the first node according to first parameters of other data packets. Therefore, the transmission resource is not only used for transmitting the data of the first data packet, but also used for transmitting the data of other data packets.

Therefore, in the data transmission method using the wireless backhaul network according to the embodiment of the present application, the node (e.g., the first node) reports the first parameter of the data packet (e.g., the first data packet) to the parent node of the node, so that the parent node of the node can schedule transmission resources for the node according to the first parameter of the data packet, thereby optimizing an uplink scheduling manner, effectively improving accuracy of uplink scheduling, and further improving transmission performance of data.

With reference to the second aspect, in some implementations of the second aspect, the first parameter of the first packet further includes a hop count of a first transmission path, where the hop count of the first transmission path is a number of nodes through which the first packet passes during being transmitted on the first transmission path, and the first transmission path is a transmission path between the first node and the host node, where the transmission path starts at the first node and ends at the host node.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes:

and the father node of the first node sends corresponding relation information to the first node, wherein the corresponding relation information is used for indicating the corresponding relation between the first parameter of the first data packet and a first Data Radio Bearer (DRB), and the first DRB is used for bearing the first data packet.

In a third aspect, a data transmission method for a wireless backhaul network including at least one wireless backhaul node and a host node is provided, the method comprising:

a child node of a first node generates a second message, where the second message is used to determine a remaining packet delay budget for a first packet, where the remaining packet delay budget for the first packet is a delay requirement for the first packet to be transmitted from the first node to the host node, and the first node is any one of a terminal-side device or the at least one wireless backhaul node;

the child node of the first node sends a second message to the first node.

With reference to the third aspect, in certain implementations of the third aspect, the second message includes time information and latency information, where the time information is used to indicate a time when the first data packet is received by a child node of the first node or a time when the first data packet is sent, and the latency information is used to indicate a latency requirement for the first data packet to be transmitted from the child node of the first node to the host node.

With reference to the third aspect, in certain implementation manners of the third aspect, the second message includes information indicating a time when the terminal-side device sends the first data packet.

With reference to the third aspect, in certain implementations of the third aspect, the method further includes:

a child node of the first node sends a first message to the first node, where the first message includes information indicating a hop count, where the hop count in the first message is a hop count of a first transmission path, or the hop count in the first message is a number of nodes through which the first packet passes in a process of being transmitted on a second transmission path, the first transmission path is a transmission path between the first node and the host node, where the first transmission path starts from the first node and ends at the host node, and the second transmission path is a transmission path between the child node of the first node and the host node, where the second transmission path starts from the child node of the first node and ends at the host node.

In a fourth aspect, a data transmission method for a wireless backhaul network comprising at least one wireless backhaul node and a host node is provided, characterized in that the method comprises:

a first node determines a first parameter of a first data packet, where the first parameter of the first data packet is used to determine a unit data packet delay budget for characterizing the first data packet, where the unit data packet delay budget of the first data packet represents a delay requirement for the first data packet to be transmitted between two adjacent nodes, and the first node is any one of a terminal-side device and the at least one wireless backhaul node;

The two adjacent nodes may be any two adjacent nodes in the wireless backhaul network, where one of the two adjacent nodes is a child node, and the other node is a parent node of the child node. The unit PDB of the first packet may approximately represent a latency requirement for the first packet to be transmitted between the first node and a parent node of the first node.

Therefore, in the data transmission method for the wireless backhaul network according to the embodiment of the present application, the unit packet delay budget of a data packet (e.g., a first data packet) indicates a delay requirement for the data packet to be transmitted between any two adjacent nodes in the wireless backhaul network, and is not a prior art delay requirement indicating that the data packet is transmitted between a terminal device and a host node, which can more accurately characterize a transmission attribute of the data packet between two adjacent nodes.

With reference to the fourth aspect, in some implementations of the fourth aspect, the sending, by the first node, the first packet to the parent node of the first node according to the first parameter of the first packet includes:

the first node mapping the first data packet on a first data radio bearer, DRB, corresponding to a first parameter of the first data packet;

the first node transmits the first data packet on the first DRB.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes:

With reference to the fourth aspect, in some implementations of the fourth aspect, the first parameter of the first packet includes:

a remaining packet delay budget for the first packet and a number of hops for a first transmission path, wherein,

the remaining packet delay budget of the first packet is a delay requirement for the first packet to be transmitted from the first node to the host node, the hop count of the first transmission path is the number of nodes through which the first packet passes during transmission on the first transmission path, and the first transmission path is a transmission path between the first node and the host node, starting from the first node and ending at the host node.

With reference to the fourth aspect, in some implementations of the fourth aspect, the hop count of the first transmission path is configured by the host node for the first node.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first node is any one of the at least one wireless backhaul node; and, the method further comprises:

the method further comprises the following steps:

With reference to the fourth aspect, in certain implementations of the fourth aspect, the first node is any one of the at least one wireless backhaul node; and the number of the first and second groups,

the method further comprises the following steps:

the first node receives a second message from a child node of the first node, the second message being used to determine a remaining packet delay budget for the first packet.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second message includes time information and latency information, where the time information is used to indicate a time when the first data packet is received or sent by a child node of the first node, and the latency information is used to indicate a latency requirement for the first data packet to be transmitted from the child node of the first node to the host node.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second message includes information indicating a time when the terminal-side device transmitted the first packet.

a total packet delay budget for the first packet and a number of hops on a third transmission path, wherein,

the total packet delay budget of the first packet is a delay requirement for the first packet to be transmitted from the terminal-side device to the host node, the third transmission path is a transmission path between the terminal-side device and the host node, where the transmission path takes the terminal-side device as a starting point and the host node as an end point, and the hop count of the third transmission path is the number of nodes through which the first packet passes in the transmission process on the third transmission path.

the first node sends a third message to a parent node of the first node, wherein the third message comprises information used for representing the first parameter of the first data packet.

In a fifth aspect, an apparatus for a wireless backhaul network is provided for performing the method in any possible implementation manner of any one of the above aspects. In particular, the apparatus comprises means for performing the method in any one of the possible implementations of any one of the aspects described above.

In a sixth aspect, another apparatus for a wireless backhaul network is provided, the apparatus comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory, and the processor communicate with each other through an internal connection path, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control the receiver to receive signals and control the transmitter to transmit signals, and the processor is configured to execute the instructions stored by the memory to cause the processor to perform the method of any one of the possible implementations of any one of the aspects.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when run by a computer, causes the computer to perform the method of the above aspects.

In an eighth aspect, a computer-readable medium is provided for storing a computer program comprising instructions for performing the method in the above aspects.

In a ninth aspect, there is provided another chip comprising: the system comprises an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected through an internal connection path, the processor is used for executing codes in the memory, and when the codes are executed, the processor is used for executing the method in the aspects.

Drawings

Fig. 1 is a schematic diagram of a communication system applied to an embodiment of the present application.

Fig. 2 is a schematic diagram of another communication system applied to an embodiment of the present application.

Fig. 3 is a schematic interaction diagram of a data transmission method for a wireless backhaul network according to an embodiment of the present application.

Fig. 4 is a schematic interaction diagram of another data transmission method for a wireless backhaul network according to an embodiment of the present application.

Fig. 5 is a schematic block diagram of an apparatus for a wireless backhaul network of an embodiment of the present application.

Fig. 6 is a schematic block diagram of another apparatus for a wireless backhaul network according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple.

The technical solution in the present application will be described below with reference to the accompanying drawings.

Compared with the fourth generation mobile communication system, the fifth generation mobile communication system (5 th-generation, 5G) has all-around requirements for various network performance indexes. For example, the capacity index is improved by 1000 times, the coverage requirement is wider, the time delay is ultrahigh and reliable, and the time delay is ultralow. On one hand, in consideration of rich high-frequency carrier frequency resources, in a hot spot area, in order to meet the requirement of 5G ultrahigh capacity, networking by using high-frequency small stations is more popular. The high-frequency carrier wave has poor propagation characteristics, is seriously attenuated by shielding and has a small coverage range, so a large number of densely deployed small stations are needed, and accordingly, the cost of providing optical fiber return for the densely deployed small stations is high, the construction difficulty is high, and an economic and convenient return scheme is needed; on the other hand, from the perspective of wide coverage requirements, network coverage is provided in some remote areas, the deployment difficulty of optical fibers is high, the cost is high, and a flexible and convenient access and return scheme also needs to be designed.

In order to further reduce the deployment cost and improve the deployment flexibility, 5G introduces an Integrated Access and Backhaul (IAB) technology, and an access link (access link) and a backhaul link (backhaul link) both adopt a wireless transmission scheme, thereby avoiding optical fiber deployment.

The wireless backhaul network based on the IAB technology, for example, the IAB network includes a wireless backhaul node and a host node, and the terminal device may be connected to the host node through the wireless backhaul node, and in a part of links of the IAB network, the terminal device may also be connected to the host node through a wireless air interface. In uplink transmission, the terminal device transmits data to the host node through the wireless backhaul node, and in downlink transmission, the host node transmits data to the terminal device through the wireless backhaul node. Next, a description will be given of related terms in the IAB network according to the embodiment of the present application.

Wireless backhaul node and host node

In the embodiment of the present application, a node supporting integrated access and backhaul is referred to as a wireless backhaul node. In the LTE communication system, the wireless backhaul node may also be referred to as a Relay Node (RN), and in 5G, the wireless backhaul node may also be referred to as an IAB node (IAB node). For convenience of description, the IAB node is taken as an example for explanation.

The IAB node may provide radio access services to terminal devices whose data (which may include user plane data and control plane signaling) is transmitted by the IAB node over a wireless backhaul link to the host node.

In the embodiment of the present application, the donor node is also referred to as an IAB donor (IAB donor) or a donor base station (donor gdnodeb, dgNB). Specifically, the DgNB may be an access network element having a complete base station function, or may be an access network element including a Centralized Unit (CU) and a Distributed Unit (DU) in separate forms. The DgNB is connected to core network elements serving the terminal devices, e.g., to a 5G core (5G core, 5gc), and provides a wireless backhaul function for the IAB node. For convenience of description, in this embodiment, the centralized unit of the host node is referred to as a host CU (donor CU) for short, and the distributed unit of the host node is referred to as a host DU (donor DU) for short, where the donor CU may also be in a form separated by a Control Plane (CP) or a User Plane (UP), for example, one CU includes one CU-CP and multiple CU-UPs, which is not limited in this embodiment.

Father node and child node

IAB networks may support multi-hop and multi-connection networking, and therefore, multiple transmission paths may exist between the end devices and the host nodes. On a certain transmission path, there are certain hierarchical relationships between the terminal device and the IAB node providing the wireless access service for the terminal device, between the IAB nodes, and between the IAB node and the host node providing the backhaul service for the IAB node. The node providing the wireless backhaul service for the IAB node is referred to as a parent node of the IAB node, or the node providing the wireless access service for the terminal device is referred to as a parent node of the terminal device, the IAB node may be regarded as a child node of the parent node of the IAB node, and the terminal device may be regarded as a child node of the parent node of the terminal device. Here, the parent node of the IAB node may be another IAB node or a host node, and when the IAB node and the host node communicate directly through a wireless air interface, the parent node of the IAB node is the host node.

Access Link (AL)

The radio links used by the terminal device when communicating with the nodes (e.g., IAB nodes, donor nodes, or donor DUs) that provide radio access services to it include uplink and downlink transmissions. Uplink transmission on the access link, also referred to as access link uplink transmission, in the direction from the terminal device to the node; the downlink transmission is also referred to as downlink transmission of the access link, the transmission direction of which is from the node to the terminal device.

Back transmission link (backhaul link, BL)

The backhaul link refers to a wireless link used when an IAB node communicates with its parent node, and the parent node may be an IAB node or a host node, and includes links for uplink transmission and downlink transmission. Uplink transmissions on the backhaul link, also referred to as backhaul uplink transmissions, are transmitted in a direction from the IAB node to a parent node of the IAB node; the downlink transmission is also called a downlink transmission of the backhaul link, and the transmission direction thereof is from the parent node of the IAB node to the IAB node.

Transmission path

The whole route from the sending node to the receiving node, the path is composed of at least one link, and in this embodiment, the link represents a connection between adjacent nodes. That is, the transmission path is a transmission path between the sending node and the receiving node, starting from the sending node and ending at the receiving node. Subsequently, for convenience of description, a transmission path between a transmitting node and a receiving node with the transmitting node as a starting point and the receiving node as an ending point may be described as a transmission path between the transmitting node and the receiving node.

In the uplink transmission, any node other than the host node between the terminal device and the host node may be used as the transmission node, and an upper node of the transmission node (for example, a parent node of the transmission node or a parent node of the parent node) may be used as the reception node. For example, the sending node may be an IAB node, the receiving node may be a parent node of the IAB node, and the global route between the IAB node and the parent node of the IAB node represents a transmission path. As another example, the sending node may be an IAB node, the receiving node may be a home node, and the global route between the IAB node and the home node represents a transmission path.

Similarly, in the downlink transmission, the transmitting node may be any node between the host node and the terminal device except for the terminal device, and the receiving node may be a node lower than the transmitting node (e.g., a child node of the transmitting node or a child node of the child node, etc.). For example, the sending node may be an IAB node, the receiving node may be a child node of the IAB node, and the global route between the IAB node and the child node of the IAB node represents a transmission path. As another example, the sending node may be an IAB node, and the receiving node may be a terminal device, where a global route between the IAB node and the terminal device represents a transmission path.

For better understanding of the embodiments of the present application, a communication system applied to the embodiments of the present application is first described below with reference to fig. 1 and 2.

It should be noted that, the communication system to which the embodiment of the present application is applied includes, but is not limited to: a narrowband internet of things (NB-IoT) system, a Wireless Local Access Network (WLAN) system, a Long Term Evolution (LTE) system, a next generation 5G mobile communication system, or a communication system of a subsequent Evolution, such as a New Radio (NR) communication system.

Fig. 1 is a schematic diagram of a communication system applied to an embodiment of the present application. In fig. 1, the communication system supports a multi-hop and single-connection scenario, the communication system includes a host node, an IAB node A, IAB node B, and a UE1, where the UE1 is any one example of a terminal device according to an embodiment of the present application. The parent node of the IAB node a is the host node, the IAB node a is the parent node of the IAB node B, and the IAB node B is the parent node of the UE1.

In uplink transmission, data of the UE1 is sent to the host node through at least one IAB node, and then sent to the mobile gateway device (e.g., a user plane functional Unit (UPF) unit in a 5G core network) by the host node.

As described above, the transmitting node may be any node between the UE1 and the host node except for the host node, and the receiving node may be a higher node of the transmitting node (e.g., a parent node of the transmitting node or a parent node of the parent node, etc.). For example, the sending node may be an IAB node B, the receiving node may be a host node, and the transmission path between the IAB node B and the host node is: IAB node B → IAB node A → donor node. For another example, the sending node may be an IAB node B, the receiving node may be an IAB node a, and the transmission path between the IAB node B and the IAB node a is: IAB node B → IAB node A.

In the downlink transmission, the host node transmits downlink data received from the mobile gateway device to the UE1 through at least one IAB node.

Similarly, in downlink transmission, the transmitting node may be any node other than the terminal device between the donor node and the UE1, and the receiving node may be a lower node of the transmitting node (e.g., a child node of the transmitting node or a child node of the child node, etc.). For example, the sending node may be IAB node a, the receiving node may be UE1, and the transmission path between UE1 and IAB node a is: IAB node A → IAB node B → UE1.

Fig. 2 is a schematic diagram of another communication system applied to the embodiment of the present application. The communication system of fig. 2 supports multi-hop and multi-connection scenarios. The communication system comprises a host node, an IAB node A, IAB node B, IAB node C, UE and UE2, wherein the UE1 and the UE2 are any two examples of the terminal device in the embodiment of the application. The IAB node A is also a father node of the IAB node C and the UE 2; the parent node of the IAB node B is a host node, and the IAB node B is the parent node of the IAB node C; IAB node C is the parent node for UE1. Thus, IAB node C has two parents, i.e., IAB node B and IAB node a.

Next, transmission paths will be described for uplink data and downlink data for UE1 and uplink data and downlink data for UE2, respectively.

Uplink and downlink data for UE1

In the uplink transmission, taking the receiving node as the host node as an example, a description is given to transmission paths between different sending nodes and the host node. If the sending node is UE1, the transmission path of the uplink data from UE1 to the host node includes two available transmission paths, transmission path 1A: UE1 → IAB node C → IAB node a → host node, transmission path 2A: UE1 → IAB node C → IAB node B → donor node; if the sending node is an IAB node C, the transmission path from the IAB node C to the host node includes two available transmission paths, transmission path 1B: IAB node C → IAB node a → host node, transmission path 2B: IAB node C → IAB node B → host node; if the sending node is an IAB node a, the transmission path from the IAB node a to the host node is transmission path 1C: IAB node a → host node; if the sending node is an IAB node B, the transmission path from the IAB node B to the host node is transmission path 2C: IAB node B → donor node.

In downlink transmission, taking a receiving node as UE1 as an example, a transmission path between different sending nodes and UE1 is described. If the sending node is the host node, the transmission path between the host node and the UE1 includes two available transmission paths: transmission path 3A: host node → IAB node a → IAB node C → UE1, transmission path 4A: home node → IAB node B → IAB node C → UE1; if the sending node is an IAB node a, the transmission path between the IAB node a and the UE1 is transmission path 3B: IAB node a → IAB node C → UE1; if the sending node is an IAB node B, the transmission path between the IAB node B and the UE1 is a transmission path 3C: IAB node B → IAB node C → UE1; if the sending node is an IAB node C, the transmission path between the IAB node C and the UE1 is: IAB node C → UE1.

Uplink and downlink data for UE2

In the uplink transmission, taking a receiving node as a host node as an example, a description is given to transmission paths between different sending nodes and the host node. If the sending node is UE2, the transmission path of the uplink data from UE2 to the host node is: UE2 → IAB node a → donor node; if the sending node is an IAB node a, the transmission path between the IAB node a and the host node is IAB node a → the host node.

In downlink transmission, taking a receiving node as UE2 as an example, a transmission path between different sending nodes and UE2 is described. If the sending node is the host node, the transmission path between the host node and the UE2 is: home node → IAB node a → UE 2; if the sending node is an IAB node a, the transmission path between the IAB node a and the UE2 is a transmission path 3B: IAB node A → UE 2.

It should be understood that the communication systems shown in fig. 1 and 2 are only exemplary and should not limit the embodiments of the present application. For example, in an IAB scenario where multi-hop and multi-connection are combined, there are still more other possibilities, for example, a host node and an IAB node under another host node form a dual-connection or multi-connection to provide services for a terminal device, or a terminal device forms a dual-connection or multi-connection with two or more parent nodes, and so on, which are not listed here.

In the embodiment of the present application, the host node may include, but is not limited to: an evolved node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B (HNB)), a Base Band Unit (BBU), an LTE (evolved LTE, LTE) base station, a next generation base station (g NB), and the like.

Terminal equipment in embodiments of the present application may refer to user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The IAB node is a specific name for a relay node in an IAB network, and should not be limited to the embodiment of the present application. In this embodiment of the present application, the IAB node is used for descriptive purposes only, and does not indicate a scenario in which this embodiment is used for NR only, and in this embodiment of the present application, the IAB node may refer to any node or device having a relay function in general, specifically, the IAB node may be any one of the above base stations or terminal devices having a forwarding function, or may be in an independent device form, which is not limited in this embodiment of the present application.

In an embodiment of the present application, a terminal device or a network device (e.g., the network device may be an IAB node or a host node) includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

As described in the background art, in uplink transmission of an IAB network, whether a child node determines which data to preferentially process or a parent node of the child node determines which child nodes to preferentially schedule transmission resources, qoS of data needs to be considered. However, some of the parameters characterizing the QoS of the data represent parameters of the terminal device and the host node or the user plane functional network element in the core network, e.g. the packet delay budget represents the delay requirement of the packet between the terminal device and the user plane functional network element in the core network. In an IAB network, there is at least one wireless backhaul node between most terminal devices and a host node, such that the latency requirement between two adjacent nodes (e.g., between a terminal device and a wireless backhaul node, between wireless backhaul nodes, between a wireless backhaul node and a host node) is shorter than the latency requirement between a terminal device and a host node. Therefore, in the IAB network, no matter which data is preferentially processed by the child node based on the existing QoS parameters, or the resource is scheduled by the parent node of the child node based on the existing QoS parameters, so that the final result may be inaccurate, and the transmission performance of the data is affected.

Based on the above problems, embodiments of the present application provide a data transmission method for a wireless backhaul network, which can effectively improve data transmission performance.

In this embodiment of the present application, any node in the wireless backhaul network determines at least one parameter of a packet delay budget, a hop count of a transmission path, or a unit packet loss rate of a packet, so as to send the packet according to the at least one parameter, and since the at least one parameter represents a parameter between the node and a host node, compared with a parameter used for representing between a terminal device and a host node or a user plane function network element in a core network in a QoS parameter in the prior art, an attribute of the packet can be represented more accurately, so that a transmission performance of data can be improved.

It should be understood that the names of all nodes, messages, and parameters in the embodiments of the present application are only names set for convenience in description, and the names in an actual network may be different, and it should not be understood that the present application defines the names of various nodes, messages, and parameters, on the contrary, any name having the same or similar function as the node, message, or parameter used in the present application is considered as the method or equivalent replacement of the present application, and is within the protection scope of the present application, and will not be described in detail below. Further, in the claimed embodiments, a message may include one or more information (or signaling).

In the embodiment of the present application, an apparatus for implementing the method or the step of the embodiment of the present application may be the apparatus itself, or may be a chip or a processor configured in the apparatus, which is capable of implementing the method or the step of the embodiment of the present application, and the embodiment of the present application is not limited thereto. For example, the device may be a first node, a terminal-side device, a child node of the first node, or a parent node of the first node, which are described below. The terminal-side device described below may be the terminal device itself, or may be a chip or a processor disposed inside the terminal device. For convenience of description, the terminal device description is adopted uniformly.

Next, referring to fig. 3, a data transmission method 100 for a wireless backhaul network according to an embodiment of the present application will be described. The method 100 describes embodiments of the present application from the perspective of uplink transmissions in a wireless backhaul network. For convenience of description, the first node and the first packet are taken as examples for illustration.

S110, a first node determines a first parameter of a first data packet, where the first parameter of the first data packet includes a remaining packet delay budget of the first data packet, the first node is any one of a terminal side device or the at least one wireless backhaul node, and the remaining packet delay budget of the first data packet is a delay requirement for the first data packet to be transmitted from the first node to the host node.

S120, the first node sends the first data packet according to the first parameter of the first data packet.

By way of example and not limitation, in the communication system shown in fig. 1, the first node may be any one of UE1, IAB node B, or IAB node a; in the communication system shown in fig. 2, the first node may be any one of UE1, UE2, IAB node C, IAB node A, IAB node B.

For convenience of description, as an example and not by way of limitation, in the embodiment of the present application, the packet delay budget may be abbreviated as PDB, which is generally referred to as packet delay budget.

Since the wireless backhaul network supports the multi-hop scenario, the remaining PDB of the first data packet may be understood as a delay requirement of the first data packet between a current node (e.g., a first node) to a host node, and the current node may be understood as a node currently needing to send the first data packet, which may be a terminal side device, and may be any one of at least one wireless backhaul node in the wireless backhaul network. In general, the smaller the remaining PDB of the first packet, the higher the latency requirement of the first packet, and the larger the remaining PDB of the first packet, the lower the latency requirement of the first packet.

Specifically, the first node determines the remaining PDBs of the first packet, and before transmitting the first packet, for example and without limitation, maps the first packet on a corresponding Data Radio Bearer (DRB) at an adaptation layer, and maps the DRB corresponding to the first packet on a logical channel at a Radio Link Control (RLC) layer, so as to transmit the first packet based on the priority of the logical channel. The first parameter may be taken into account in the packet mapping process to send the first packet. For the way in which the first node determines the remaining PDBs of the first data packet and the way in which the first node sends the first data packet according to the first parameter, refer to the following detailed description.

Therefore, in the data transmission method for the wireless backhaul network according to the embodiment of the present application, the remaining packet delay budget of a data packet (e.g., a first data packet) indicates a delay requirement that the data packet is transmitted between a node (e.g., a first node) that currently needs to send the data packet and a host node, and is not completely the delay requirement that the data packet is transmitted between the terminal device and a user plane function network element in a core network in the conventional technology, so that a transmission attribute of the data packet between the node and the host node can be more accurately characterized. Therefore, the node transmits the data packet through the determined residual data packet delay budget of the data packet, and the transmission performance of the data can be effectively improved.

In this embodiment, not only the remaining PDBs may represent the transmission attribute of the data packet between the current node and the host node, but also other parameters may represent the transmission attribute of the data packet between the current node and the host node. Similarly, the first packet is taken as an example for explanation.

Optionally, the first parameter of the first packet further includes a hop count of a first transmission path, where the hop count of the first transmission path is a number of nodes through which the first packet passes during being transmitted on the first transmission path, and the first transmission path is a transmission path between the first node and the host node, where the transmission path uses the first node as a starting point and uses the host node as an end point.

It will be appreciated that the number of hops on the first transmission path can represent the distance between the first node and the host node or between the first node and the terminal device.

In a single-connection scenario, there is only one transmission path between the first node and the host node, and reference may be made to the description above regarding the transmission paths between the different sending nodes and the host node in fig. 1, where the first transmission path is the only transmission path. In a multi-connection scenario, there may be one or more transmission paths from some nodes to the host node, and referring to fig. 2, if the first node is an IAB node B or an IAB node a, there is one transmission path between the IAB node B or the IAB node a and the host node, and if the first node is an IAB node C, there are two transmission paths between the IAB node C and the host node, and the related detailed description may refer to the description above for fig. 2, in which case, the first transmission path may be any one of the two transmission paths. To summarize, if there is only one transmission path between the first node and the host node, the first transmission path is the only transmission path; if there are multiple transmission paths between the first node and the host node, the first transmission path is any one of the multiple transmission paths.

In the embodiments of the present application, the hop count of the first transmission path has various explanations. Assuming that the number of the wireless backhaul nodes between the first node and the host node is N, the hop count of the first transmission path may be N, the sum of N +1 of the number of the wireless backhaul nodes between the first node and the host node and the first node, or N +2 of the number of the first node, the host node and the wireless backhaul nodes between the first node and the host node, which is not limited in this embodiment. Taking fig. 1 as an example, assuming that the first node is an IAB node B, and the number of IABs between the IAB node B and the host node is 1, the number of hops on the transmission path between the IAB node B and the host node is 1, 2, or 3.

The first transmission path includes M links, and then the hop count of the first transmission path is M. Taking fig. 1 as an example, if 3 transmission links are included in the transmission path between the UE1 and the host node, the hop count of the transmission path is 3.

For convenience of description, in contrast to the number of hops on the transmission path between the terminal device and the host node, in this embodiment, the number of hops on a certain transmission path (e.g., a first transmission path) between any node (e.g., a first node) and the host node may be simply referred to as a remaining number of hops, and the number of hops on a certain transmission path between the terminal device and the host node may be simply referred to as a total number of hops. The node on a certain transmission path between the terminal device and the host node includes a node on a certain transmission path between any one of the nodes and the host node, or a certain transmission path between the terminal device and the host node coincides with a certain transmission path between any one of the nodes and the host node, or all nodes configured on a certain transmission path between the terminal device and the host node include all nodes configured on a certain transmission path between any one of the nodes and the host node.

Optionally, the first parameter of the first data packet further includes: the unit packet loss rate of the first data packet represents the packet loss rate of the first data packet between two adjacent nodes.

The packet loss rate represents the upper limit of the ratio of the number of incorrectly transmitted data packets to the transmission data group. In addition, the two adjacent nodes may be any two adjacent nodes in the wireless backhaul network, where one of the two adjacent nodes is a child node of the other node, and the other node is a parent node of the child node.

For convenience of description, as an example and not a limitation, in the embodiment of the present application, the packet loss rate may be referred to as PER for short, and the packet error rate is generally referred to in english.

In this embodiment, the first node may send the first packet in the following two ways (denoted as way a and way B). These two modes will be described in detail below.

Mode A

the first node transmits the first data packet on the first DRB.

Specifically, a first parameter of a plurality of data packets has a corresponding relationship with a plurality of DRBs, the first parameter of one data packet has one value of the first parameter, that is, a plurality of values of the first parameter have a corresponding relationship with the plurality of DRBs, each value of the first parameter corresponds to each DRB, and before the first node sends the first data packet, according to the first parameter of the first data packet, the first node may determine, from the corresponding relationship between the plurality of values of the first parameter and the plurality of DRBs, a DRB (denoted as a first DRB) corresponding to the first parameter of the first data packet, so that the first node sends the first data packet on the first DRB.

Alternatively, the DRB may be indicated by an identity for the DRB.

By way of example and not limitation, the correspondence between a plurality of values of the first parameter and a plurality of DRBs will be described below with reference to tables 1, 2, 3, and 4. It should be understood that the corresponding relationships shown in table 1, table 2, table 3, and table 4 are only schematic illustrations, and any form representing the corresponding relationships is within the scope of the embodiments of the present application.

Table 1 shows a correspondence between a plurality of values of the first parameter and a plurality of DRBs, where the first parameter includes at least one of a remaining PDB, a remaining hop count, or a remaining packet loss rate.

When the first parameter includes the remaining PDB, the correspondence between the remaining PDB and the DRB in table 1 may be referred to. Where each remaining PDB belongs to a particular range of values, it can also be considered that each DRB corresponds to a range of values associated with the remaining PDB. For a first packet, if the remaining PDBs of the first packet satisfy a certain value range (denoted as a first value range), the first packet is mapped to a DRB corresponding to the first data range (i.e., a first DRB). The first DRB may be a DRB identified by any one of the DRB IDs in table 1.

When the first parameter includes the remaining hop count, the correspondence between the remaining hop count and the DRB in table 1 may be referred to. Each DRB corresponds to a group of residual hop count, and each group of residual hop count comprises at least one residual hop count. For a first data packet, if the remaining hop count of the first data packet satisfies the remaining hop count in any group of remaining hop counts, mapping the first data packet to a DRB (i.e., a first DRB) corresponding to the group of remaining hop counts. The first DRB may be a DRB identified by any one of the DRB IDs in table 1.

By way of example and not limitation, each DRB may correspond to a particular range of values, or each DRB may be considered to correspond to a range of values associated with the number of remaining hops. If the remaining hop count of the first packet satisfies a certain value range (denoted as a second value range), the first packet is mapped to a DRB (i.e., a first DRB) corresponding to the second data range.

When the first parameter includes the unit packet loss rate, the correspondence relationship between the unit PERs and the DRBs in table 1 may be referred to. Where each unit PER belongs to a particular range of values, it can also be considered that each DRB corresponds to a range of values associated with a unit PER. For a first data packet, if the unit PER of the first data packet satisfies a certain range of values (denoted as a third range of values), the first data packet is mapped to a DRB (i.e., a first DRB) corresponding to the third range of values. The first DRB may be a DRB identified by any one of the DRB IDs in table 1.

When the first parameter includes at least two of the three parameters, the first packet needs to be mapped to a DRB that satisfies the above conditions by referring to the corresponding relationship between each of the at least two parameters and the DRB at the same time. For example, when the first parameter includes the remaining PDB and the remaining hop count, the first data packet is mapped to the DRB that satisfies the above conditions at the same time by referring to the corresponding relationship between the remaining PDB and the DRB and the corresponding relationship between the remaining hop count and the DRB; for another example, when the first parameter includes the remaining PDB, the remaining hop count, and the unit PER, the first data packet needs to be mapped to the DRB that simultaneously satisfies the above conditions, by referring to the corresponding relationship between the remaining PDB and the DRB, the corresponding relationship between the remaining hop count and the DRB, and the corresponding relationship between the unit PER and the DRB.

TABLE 1

DRB ID	Residual PDB	Number of remaining hops	Unit packet loss rate
				1	A<Residual PDB<B	n1，n2	D<Unit PER<E
2	B<Residual PDB<C	n3	E<Unit PER<F
				……	……	……	……

Table 2 shows correspondence between a plurality of values of the first parameter and a plurality of DRBs, where the first parameter includes a PDB and a remaining hop count. In table 2, as an example and not by way of limitation, the remaining PDBs and the remaining hops that are in a proportional relationship may be combined, for example, the remaining PDBs with a larger value and the remaining hops with a larger value are placed in the same group, and the remaining PDBs with a smaller value and the remaining hops with a smaller value are placed in the same group, so that the data packets with the similar ratios of the remaining PDBs and the remaining hops may be mapped to the same DRB. A DRB corresponds to one or more groups, each group comprises a residual PDB and a residual hop count, and when a DRB corresponds to a plurality of groups, the DRB indicates that the ratio of two parameters in each group in any two groups is close. It can be understood that two parameters in one group become approximately proportional relation, the ratio of the two parameters can approximately represent the PDBs of two adjacent nodes, and can effectively represent the relevant attributes of the data packet at the two adjacent nodes, thereby improving the data transmission performance.

TABLE 2

Table 3 shows a corresponding relationship between a plurality of values of the first parameter and a plurality of DRBs, where the first parameter includes a unit PER and a remaining hop count. In table 3, unit PERs with different values and remaining hop counts may be combined, one combination corresponds to one DRB, or data packets with a similar ratio of the unit PER to the remaining hop counts may be mapped to the same DRB, that is, one DRB may correspond to multiple groups.

TABLE 3

Table 4 shows a corresponding relationship between a plurality of values of the first parameter and a plurality of DRBs, where the first parameter includes a unit PER, a remaining hop count, and a remaining PDB. In table 4, unit PERs, residual hop counts, and residual PDBs with different values are combined, and data packets with a similar ratio of any two parameters in different groups can be mapped to the same DRB, that is, one DRB can correspond to multiple groups.

TABLE 4

It should be understood that in actual data transmission, the first node may not only transmit the first data packet according to the first parameter of the first data packet, but also may transmit the first data packet according to the QoS parameter. Specifically, the QoS parameter includes a plurality of parameters, each of the plurality of parameters has a corresponding relationship with a 5QI (refer to table 5), the 5G QoS identifier (5G QoS identifier,5 QI) has a corresponding relationship with a DRB, a plurality of values of each parameter in the QoS parameter correspond to a plurality of values of the 5QI, a plurality of values of the 5QI correspond to a plurality of DRBs, specifically, at least one value of the 5QI may correspond to one DRB, that is, a packet corresponding to at least one 5QI may be mapped to one DRB for transmission, the QoS parameter has a corresponding relationship with the DRB, the first node determines one DRB according to the corresponding relationship between the OoS parameter of the first packet and the DRB and the corresponding relationship between the first parameter and the DRB, and sends the first packet on the determined DRB.

Table 5 shows the correspondence between QoS parameters and 5QI in the embodiments of the present application. It should be understood that the correspondence shown in table 5 is only illustrative, and any form representing the correspondence is within the scope of protection of the embodiments of the present application. It should be noted that the packet delay budget in table 5 indicates the packet delay budget of the packet between the terminal device and the user plane functional network element in the core network.

TABLE 5

In this embodiment of the present application, at least one parameter of the remaining PDBs, the remaining hop counts, or the remaining packet loss ratios may be used as a newly added parameter in the QoS parameter list of 5QI to form a new QoS parameter list (refer to table 6), where a plurality of values of each parameter in the QoS parameters including the first parameter correspond to a plurality of values of 5QI, and a plurality of values of 5QI correspond to a plurality of DRBs, so that the DRBs corresponding to the data packets may be determined based on the modified correspondence relationship between the QoS parameters and 5QI and the correspondence relationship between 5QI and DRBs.

Table 6 shows the correspondence between the new QoS parameters and 5QI in the embodiments of the present application. The first parameter includes a remaining PDB, a remaining hop count, and a remaining packet loss rate. As an example and not by way of limitation, the first parameter may also include any one or any two of the remaining PDB, the remaining hop count, or the remaining packet loss ratio, or the first parameter may also include other parameters, which is not limited in this embodiment of the present application. It should be understood that the correspondence shown in table 6 is only an illustrative example, and any form showing the correspondence is within the scope of protection of the embodiments of the present application. It should be noted that the packet delay budget in table 6 represents the packet delay budget of the packet between the terminal device and the user plane function network element in the core network.

TABLE 6

When the first parameter includes a plurality of parameters (e.g., at least two parameters of the remaining PDBs, the remaining hop counts, or the unit packet loss ratios), in order to reduce implementation complexity and signaling overhead, the plurality of parameters may be quantized into one quantization parameter, when representing the correspondence between the first parameter and the DRB, the correspondence between the first parameter and the DRB may not need to be represented like the correspondence between each parameter and the DRB in table 1, table 2, table 3, table 4, or table 6, and the quantization parameter may be used to represent the first parameter, so that the correspondence between the first parameter and the DRB may be simply represented as the correspondence between the quantization parameter and the DRB.

For example, the first parameter includes a remaining PDB and a remaining hop count, which may be determined by, by way of example and not limitation, c = a i + b j, where c represents the quantization parameter, i represents the remaining PDB, j represents the remaining hop count, and a and b are constants.

Optionally, regarding a manner of obtaining the correspondence between the first parameter of the first data packet and the first DRB, the first node receives correspondence information from a parent node or a host node of the first node, where the correspondence information is used to indicate the correspondence between the first parameter of the first data packet and the first DRB.

If the host node sends the corresponding relationship information and other wireless backhaul nodes exist between the first node and the host node, the other wireless backhaul nodes can forward or transmit the corresponding relationship information to the first node. The other wireless backhaul node is a superior node of the first node (e.g., a parent node of the first node, or a parent node of the first node).

In addition, the correspondence information may include not only the correspondence between the first parameter of the first data packet and the first DRB, but also the correspondence between other values of the first parameter and the DRBs, that is, the correspondence information may include the correspondence between a plurality of values of the first parameter and a plurality of DRBs, and the correspondence between a plurality of values of the first parameter and a plurality of DRBs may be in any form of table 1, table 2, table 3, table 4, or table 6, for example and without limitation.

It should be noted that, because the data packets of different DRBs have different QoS requirements, that is, the data packet on each DRB corresponds to a priority, which can be represented by a priority of a logical channel, in general, one DRB corresponds to one logical channel, and in some cases, one DRB may correspond to multiple logical channels, for example, in a duplicate (duplicate) transmission scenario, one DRB corresponds to two logical channels, and the priorities of the two logical channels are the same. Therefore, in the actual data transmission process, the data packet is mapped to the DRB in the adaptation layer, and the DRB may be further mapped to the logical channel in the Radio Link Control (RLC), and further, the data packet is transmitted based on the priority of the logical channel corresponding to the DRB.

Specifically, for the first data packet, the first DRB corresponds to a logical channel (denoted as a second logical channel), and the priority of the second logical channel also indicates the priority of the first DRB, so that the first node can transmit the first data packet according to the priority of the second logical channel corresponding to the first DRB. More specifically, the first node may fill a group of logical channels including the second logical channel into a group according to the priority order of all logical channels in the group of logical channels, and sequentially transmit the data packets in the group of logical channels according to the priority order.

In the data transmission method for the wireless backhaul network according to the embodiment of the present application, because QoS requirements (e.g., PDB requirements or PER requirements) corresponding to data packets transmitted by a node (e.g., a first node) on a current link on the DRB are close, it can be ensured that data packets having similar QoS requirements in each DRB are processed identically in a data transmission process, and it is avoided that a service with a certain low latency or high reliability requirement in the DRB affects transmission performance of other data.

Mode B

the first node transmits the first data packet according to the priority of the first logical channel.

As described above, the QoS parameter of the packet corresponds to the DRB, and the DRB corresponds to the logical channel, so that the QoS parameter of the packet corresponds to the logical channel. The corresponding relationship between the QoS parameter and the DRB may refer to the description of the corresponding relationship in the manner a, and for brevity, will not be described herein again.

Specifically, the first node determines a corresponding DRB (denoted as a second DRB) according to the QoS parameter of the first data packet, determines a corresponding logical channel (denoted as a first logical channel) according to the second DRB, and determines the priority of the first logical channel according to the first parameter of the first data packet, so as to transmit the first data packet according to the priority of the first logical channel. As described above, in actual transmission, the first node may perform padding and packaging on a group of logical channels including the first logical channel according to the priority order of all logical channels in the group of logical channels based on the resource size given by uplink scheduling, and further send a data packet in the group of logical channels. When the priority of the first logical channel is higher, the first data packet can be preferentially packed, and when the priority of the first logical channel is lower, the first data packet can be subsequently packed until the data packets in all the logical channels are packed or the resources allocated by uplink scheduling are used up, wherein the two conditions meet one of the conditions, namely, the packing operation is completed, and the well-packed data packet is sent.

In the embodiment of the present application, the transmission of the first packet according to the priority of the first logical channel not only indicates the operation of transmitting the first packet, but also indicates the relevant processing performed to transmit the first packet, for example, the above-mentioned grouping of the first packet according to the priority of the first logical channel.

Optionally, when there are multiple groups of logical channels, the first node may first determine a group of logical channels with the highest priority according to the priority of each group of logical channels, fill the group of logical channels into a group according to the priority order of the logical channels, if the transmission resource allocated by the parent node of the first node to the first node can transmit the data packets in all the logical channels in the group of logical channels and there are remaining transmission resources, continue to select a group of logical channels with a next highest priority, and continue to fill the group according to the above rule until the transmission resource is used completely or the data packets in all the logical channels are sent completely.

The priority of each group of logical channels can be determined comprehensively according to the first parameters of the plurality of data packets in each group of logical channels. For example, when the first parameter includes one parameter, the first node may generate one quantization parameter according to the first parameter of the plurality of data packets in each group of logical channels, and determine the priority of each group of logical channels based on the quantization parameter value of each group of logical channels; for another example, when the first parameter includes multiple parameters, the first node may quantize the multiple parameters of each data packet in each group of logical channels into a quantization parameter, further generate a final quantization parameter according to the quantization parameters of the multiple data packets, and determine the priority of each group of logical channels based on the final quantization parameter of each group of logical channels.

When the first parameter includes the remaining PDBs, as an example and not by way of limitation, the priority of the logical channel corresponding to the data packet of the remaining PDBs with a larger value is lower, and the priority of the logical channel corresponding to the data packet of the remaining PDBs with a smaller value is higher.

When the first parameter includes the remaining hop count, as an example and not by way of limitation, the priority of the logical channel corresponding to the data packet with the larger remaining hop count is higher, and the priority of the logical channel corresponding to the data packet with the smaller remaining hop count is lower.

When the first parameter includes the remaining PDB and the remaining hop count, as an example and not by way of limitation, the priority of the logical channel corresponding to the data packet with a larger value in the ratio of the remaining PDB/the remaining hop count is lower, and the priority of the logical channel corresponding to the data packet with a smaller value in the ratio of the remaining PDB/the remaining hop count is higher. Wherein, the remaining PDB/remaining hop count is the quantization parameter.

In this embodiment, the transmission resource used by the first node to send the first data packet is scheduled by the parent node of the first node for the first node based on the amount of data to be sent by the first node. Optionally, the first node sends information indicating the amount of data in at least one group of logical channels to a parent node of the first node, and the parent node of the first node schedules transmission resources for the first node according to the indicated amount of data in at least one group of logical channels.

When the first node and other nodes both request transmission resources from its parent node at the same time, the parent node may further determine, according to the priorities of the logical channels corresponding to the data reported by the first node and other nodes, which node is to be preferentially scheduled with the transmission resources. Particularly, under the condition that the transmission resources needing to be scheduled are limited, the method can ensure the prior transmission of the data with higher priority and improve the transmission performance of the data.

Therefore, in order to optimize uplink scheduling and make the decision result of uplink scheduling more accurate, the embodiment of the present application provides an optional implementation manner:

in S131, the first node sends a third message to the parent node of the first node, where the third message includes information representing the first parameter of the first data packet;

in S132, the parent node of the first node schedules a transmission resource for the first node according to the third message.

In S133, the parent node of the first node transmits information indicating the transmission resource to the first node.

It is to be understood that the first parameter of the first packet may reflect a priority of a logical channel to which the first packet corresponds.

The information for characterizing the first parameter may include the first parameter itself, and when the first parameter includes a plurality of parameters, the information for characterizing the first parameter may also include a quantization parameter quantized based on the plurality of parameters, and the quantization parameter may comprehensively characterize the first parameter.

Optionally, the third message further includes the first parameter of each data packet in the other data packets except the first data packet in the set of logical channels. Optionally, the third information may be a Buffer Status Report (BSR).

Optionally, when there are multiple groups of logical channels in the first node, the third message may further include information of the data amount of each group of logical channels in the multiple groups of logical channels. In this case, the third message may further include the first parameter of each data packet in each of the plurality of groups of logical channels.

It should be noted that, when the first node reports a plurality of data packets to be transmitted including the first data packet, the parent node of the first node not only schedules the transmission resource according to the first parameter of the first data packet, but also schedules the transmission resource for the first node according to the first parameters of other data packets. Therefore, the transmission resource is not only used for transmitting the first data packet, but also used for transmitting other data packets.

The first parameters of the multiple data packets may be carried by the third message in any one of the above manners, which is not limited in this embodiment.

There are many possible implementation manners for the process of scheduling transmission resources for the first node by the parent node of the first node according to the first parameter, which is described by taking the communication system shown in fig. 2 as an example. It is assumed that the first node is an IAB node B, the other nodes are IAB nodes a, each node has a plurality of data packets to be transmitted, the plurality of data packets of each node correspond to at least one group of logical channels, and each group of logical channels corresponds to at least one data packet.

In one manner, for an IAB node B, a host node may determine a priority of each group of logical channels according to a first parameter of a plurality of data packets in each group of logical channels, and as an example and not by way of limitation, may quantize the first parameter of the plurality of data packets in each group of logical channels to one parameter (denoted as parameter a), and then quantize a parameter 1 after quantization of each logical channel in the plurality of groups of logical channels to one parameter (denoted as parameter B), and use the parameter B to represent the priority of the logical channels in the IAB node B; the same processing mode is also adopted for the IAB node A to generate a parameter B of the IAB node A. In this way, the donor node compares the parameter B of the IAB node B with the parameter B of the IAB node a, and if the parameter B of the IAB node B is greater than the parameter B of the IAB node a, which indicates that the priority of the logical channel in the IAB node B is high, the donor node preferentially schedules the transmission resource for the IAB node B. It should be noted that if a node has only one set of logical channels, it is not necessary to generate the parameter B.

In another mode, for each node, as an example and not by way of limitation, without performing the above procedure of generating parameter a, the host node may directly quantize the first parameter of the packets in all the logical channel groups to one parameter (denoted as parameter C), and the host node compares parameter B of the IAB node B with parameter C of the IAB node a, and as an example and not by way of limitation, if parameter C of the IAB node B is greater than parameter C of the IAB node a, it indicates that the priority of the logical channel in the IAB node B is high, and the host node preferentially schedules transmission resources for the IAB node B.

Therefore, in the data transmission method using the wireless backhaul network according to the embodiment of the present application, the first node reports the first parameter of the data packet to the parent node of the first node, so that the parent node of the first node can schedule transmission resources for the first node according to the first parameter of the data packet, thereby optimizing an uplink scheduling manner, effectively improving accuracy of uplink scheduling, and further improving transmission performance of data.

In the above, the manner in which the first node sends the data packet according to the first parameter and the uplink scheduling of the host node of the first node is described in detail, and the manner in which the first node determines the first parameter is described in cases based on different types of the first parameter by taking the first data packet as an example.

Case 1: the first parameter of the first packet comprises a remaining PDB of the first packet

When the first node is a terminal device, in an alternative implementation manner, the first node may determine the remaining PDBs of the first data packet based on a difference between a PDB (denoted as PDB 1) used for indicating a delay requirement of the first data packet between the terminal device and the UPF network element and a PDB (denoted as PDB 2) used for indicating a delay requirement of the first data packet between the donor node and the UPF network element, where PDB1 may be obtained from an existing preconfigured QoS parameter, and PDB2 may be obtained from a signaling sent by the donor node to the first node. In another alternative implementation, the remaining PDBs of the first data packet may be obtained based on the QoS parameters reconfigured in the embodiment of the present application.

When the first node is any one of the at least one wireless backhaul node, optionally, in S101, the first node receives a second message from a child node of the first node, where the second message is used to determine the remaining packet delay budget of the first packet.

The second message may include all information for determining the remaining PDBs of the first packet, or may include partial information for determining the remaining PDBs of the first packet.

Optionally, the second message may be carried in a header of a first data packet sent by a child node of the first node. Specifically, the second message may be carried in a medium access control (mac) layer (medium access control,

MAC), RLC, or adaptation layer.

By way of example and not limitation, the second message may also be an independent message, and the second message is sent through a child node of the first node, which is not limited in this embodiment of the present application.

Next, a manner of determining, by the first node, the remaining PDBs of the first data packet according to the second message will be further described according to the content in the second message.

Mode 1A

The second message includes time information (denoted as time information 1) and delay information (denoted as delay information 1), where the time information 1 is used to indicate a time when the first data packet is received or sent by a child node of the first node, and the delay information 1 is used to indicate a delay requirement (denoted as historical remaining PDB 1) for the first data packet to be transmitted from the child node of the first node to the host node.

When the child node of the first node is a terminal device, the time information 1 is used to indicate the time when the child node of the first node sends the first data packet, and when the child node of the first node is a wireless backhaul node, the time information 1 is used to indicate the time when the child node of the first node receives the first data packet.

In this case, the first node determines the remaining PDBs of the first packet based on the second message and the time at which the first packet was received by the first node. Taking the child node of the first node as a wireless backhaul node as an example, specifically, the time delay used in the process of transmitting the first data packet from the child node of the first node to the first node is determined according to the difference between the time when the first data packet is received by the first node and the time when the first data packet is received by the child node of the first node, and the remaining PDB of the first data packet is determined by the difference between the historical remaining PDB1 and the obtained time delay used in the process of transmitting the first data packet from the child node of the first node to the first node.

For example, if the time for the child node of the first node to receive the first data packet is 8 o 'clock to 5ms, the historical remaining PDB1 is 15ms, and the time for the first node to receive the first data packet is 8 o' clock to 10ms, then the remaining PDB =15- (10-5) =10 (ms) of the first data packet.

Mode 1B

The second message includes information indicating a time when the terminal-side device transmits the first packet.

In this case, the first node determines the remaining PDBs of the first data packet according to the second message, the time when the first data packet is received by the first node, and the total PDB of the first data packet, where the total PDB of the first data packet is the delay requirement for the first data packet to be transmitted from the terminal device to the host node. Specifically, the time delay used by the first data packet to be transmitted from the terminal device to the first node is determined according to the difference between the time when the first data packet is received by the first node and the time when the first data packet is sent by the terminal device, and the remaining PDB of the first data packet can be determined by subtracting the time delay used by the first data packet to be transmitted from the terminal device to the first node from the total PDB.

For example, the total PDB is 20ms, the time when the first node receives the first data packet is 8 o 'clock and 10ms, the time when the terminal device sends the first data packet is 8 o' clock, and the total PDB is 20ms, then the remaining PDB =20- (10-0) =10 (ms) of the first data packet.

The total PDB may be determined based on a difference between the PDB (i.e. PDB 1) indicating the delay requirement of the first data packet between the terminal device and the UPF network element and the PDB (i.e. PDB 2) indicating the delay requirement of the first data packet between the host node and the UPF network element, where PDB1 may be obtained from an existing preconfigured QoS parameter, and PDB2 may be obtained from a signaling sent by the host node to the first node. In another alternative implementation, the total PDB may be obtained based on the reconfigured QoS parameters according to the embodiment of the present application.

Case 2: the first parameter of the first data packet comprises the hop count of the first transmission path

Mode 2A

The hop count of the first transmission path is configured for the first node by the host node.

By way of example, and not limitation, the host node may communicate with the wireless network via a radio resource control layer (radio resource control,

RRC) signaling, a media access control element (MAC CE), and other air interface signaling to send information indicating the hop count of the first transmission path.

In addition, on the first transmission path, when there are other wireless backhaul nodes between the first node and the host node, the other wireless backhaul nodes may forward or transmit the information indicating the hop count of the first transmission path, which is sent by the host node, to the first node.

It should be understood that when multiple transmission paths exist between the first node and the host node, the host node configures the first node with the hop count of each transmission path.

Mode 2B

When the first node is any one of the at least one wireless backhaul node, optionally,

in S102, the first node receives a first message from a child node of the first node, where the first message includes information indicating a hop count, where the hop count in the first message is a hop count of the first transmission path, or the hop count in the first message is a number of nodes through which the first packet is transmitted on a second transmission path, where the second transmission path is a transmission path between the child node of the first node and the host node, where the transmission path uses the child node of the first node as a starting point and the host node as an end point;

the first node determines the hop count of the first transmission path according to the first message.

Here, S102 may be executed simultaneously with S101, or may not be executed simultaneously, and is not limited at all here.

The second transmission path includes the first transmission path, or all nodes configured on the second transmission path include all nodes configured on the first transmission path, that is, the nodes configured on the second transmission path include the first node, nodes between the first node and the host node, and child nodes of the first node.

Taking the communication system shown in fig. 2 as an example, assuming that the first node is an IAB node B, the first transmission path is IAB node B → the host node, and the second transmission path is IAB node C → IAB node B → the host node.

Specifically, in a multi-hop and single-connection scenario, a host node or system may configure only the number of hops (referred to as a total number of hops for short) on one transmission path between the terminal device and the host node for the terminal device, and in a multi-hop and multi-connection scenario, the host node or system may configure the total number of hops on each transmission path between the terminal device and the host node for the terminal device. The first packet is transmitted from the terminal device to the parent node of the terminal device, minus 1 from the total hop count to obtain the hop count on the transmission path between the parent node of the terminal device and the host node, and in the continuous uplink transmission, the first packet is transmitted from the parent node of the terminal device to the parent node of the terminal device, and minus 1 from the remaining hop count to obtain the hop count on the transmission path between the parent node of the terminal device and the host node. By analogy, each node does so until the first packet is transmitted to the host node.

Taking the first node as an example, when the hop count in the first message is the hop count on the first transmission path, the child node of the first node subtracts 1 from the hop count of the second transmission path to obtain the hop count of the first transmission path, and sends the hop count of the first transmission path to the first node through the first message; when the number of hops in the first message is the number of hops on the second transmission path, the first node obtains the number of hops of the first transmission path by subtracting 1 from the number of hops of the second transmission path.

Case 3: the first parameter comprises a unit packet loss rate of the first data packet

In this case, the unit packet loss rate of the first packet may be determined according to the total packet loss rate of the first packet and the hop count of the transmission path (denoted as the second transmission path) between the terminal device and the host node. The total packet loss rate of the first data packet represents a packet loss rate of the first data packet between the terminal side device and the host node, the hop count of the second transmission path is the number of nodes through which the first data packet passes in the process of being transmitted on the second transmission path, and the second transmission path is a transmission path between the terminal side device and the host node, which takes the terminal side device as a starting point and the host node as an end point.

The second transmission path is any one of at least one transmission path between the terminal device and the host node, a first transmission path between the terminal device and the host node may overlap with the second transmission path, and when a multi-hop transmission path exists between the terminal device and the host node, the first transmission path may not overlap with the second transmission path.

By way of example and not limitation, the packet loss per unit of a packet can be obtained by the following formula: s ₁ ＝1-(1-s ₀ ) A (1/t), wherein s ₁ Packet loss per unit of packet, s ₀ Represents the total packet loss rate of the data packet, t represents the hop count of the transmission path, and ^ represents power operation. Taking the communication system shown in fig. 1 as an example, assuming that the hop count between the UE1 and the host node is 3, and the total packet loss rate of the first data packet from the UE1 to the host node is 0.271, the unit packet loss rate of the first data packet is:

1-(1-0.271)^(1/3)＝0.1。

the data transmission method 100 for the wireless backhaul network according to the embodiment of the present application is described in detail above, and another data transmission method 200 for the wireless backhaul network according to the embodiment of the present application is described below with reference to fig. 3. The method 200 differs from the method 100 in that the parameter obtained in the method 200 is the delay requirement for the data packet to be transmitted between two adjacent nodes. Similarly, the method 200 is described with the first packet as an example.

S210, a first node determines a first parameter of a first data packet, where the first parameter of the first data packet is used to determine a unit data packet delay budget characterizing the first data packet, where the unit data packet delay budget represents a delay requirement for the first data packet to be transmitted between two adjacent nodes, and the first node is any one of a terminal side device or the at least one wireless backhaul node;

s220, the first node sends the first data packet to the parent node of the first node according to the first parameter of the first data packet.

The first parameter may be a unit PDB itself, or may be a parameter for determining a characterization unit PDB. The unit PDB representing the first packet may be a unit PDB or a parameter capable of representing the unit PDB.

Here, the two adjacent nodes may be any two adjacent nodes in the wireless backhaul network, one of the two adjacent nodes is a child node, and the other node is a parent node of the child node.

For a detailed description of the first node, reference may be made to the description of the first node in the method 100, and details are not repeated here for brevity.

Since the wireless backhaul network supports a multi-hop scenario, data transmission between the first node and the parent node of the first node, the unit PDB of the first data packet may approximately represent a delay requirement for the first data packet to be transmitted between the first node and the parent node of the first node.

Specifically, the first node determines a first parameter of the first packet, and before transmitting the first packet, the first packet is mapped on a corresponding DRB in an adaptation layer, and the DRB corresponding to the first packet is mapped on a logical channel in a Radio Link Control (RLC) layer, by way of example and not limitation, so as to transmit the first packet based on a priority of the logical channel. In the packet mapping process, the first packet may be transmitted with the first parameter of the first packet taken into account. For the way in which the first node determines the first parameter of the first data packet and the way in which the first node sends the first data packet according to the first parameter of the first data packet, refer to the following detailed description.

Hereinafter, the first parameter of the embodiment of the present application and the manner of determining the unit PDB based on the first parameter will be described in detail based on different situations.

Case A

The first parameter of the first packet includes: a remaining packet delay budget of the first packet and a hop count of a first transmission path, wherein the remaining packet delay budget of the first packet is a delay requirement for the first packet to be transmitted from the first node to the host node, the first transmission path is a transmission path between the first node and the host node with the first node as a starting point and the host node as an end point, and the hop count of the first transmission path is a number of nodes through which the first packet passes during transmission on the first transmission path.

For a description of the remaining PDBs of the first data packet and the number of hops of the first transmission path, reference may be made to the description in the method 100, and for brevity, no further description is given here.

Optionally, after determining the first parameter of the first data packet, the first node may further determine the unit PDB of the first data packet based on the first parameter of the first data packet. Specifically, a ratio of the remaining PDB of the first packet to the hop count of the first transmission path may be used as a unit PDB for representing the first packet, a quotient obtained by dividing the remaining PDB of the first packet by the hop count of the first transmission path indicates the unit PDB, a quotient obtained by dividing the hop count of the first transmission path by the remaining PDB of the first packet indicates a parameter capable of representing the unit PDB, and the larger the value of the parameter is, the smaller the unit PDB is.

By way of example and not limitation, after the first node determines the first parameter of the first packet, it may not be necessary to determine the unit PDB of the first packet, because the combination of the two parameters can approximately represent the unit PDB of the first packet, and therefore, the first packet may be directly transmitted using the first parameter of the first packet.

Next, a description will be given of a method of the first node determining the remaining PDB of the first packet and the hop count of the first transmission path.

Manner in which the first node determines the remaining PDBs of the first packet

When the first node is any one of the at least one wireless backhaul node, optionally, in S202, the first node receives a second message from a child node of the first node, where the second message is used to determine the remaining packet delay budget of the first packet.

Next, a manner of determining the remaining PDBs of the first data packet by the first node according to the second message will be further described according to the content in the second message

Mode A1

The second message includes time information (i.e., time information 1) and delay information (i.e., delay information 1), where the time information 1 is used to indicate a time when the first data packet is received or sent by a child node of the first node, and the delay information 1 is used to indicate a delay requirement for the first data packet to be transmitted from the child node of the first node to the host node.

For the process of the first node determining the remaining PDBs of the first data packet based on the mode A1, reference may be made to the process of the first node determining the remaining PDBs of the first data packet based on the mode 1A in the method 100, and details are not described here for brevity.

Mode A2

For the process of determining the remaining PDBs of the first data packet by the first node based on the mode A2, reference may be made to the process of determining the remaining PDBs of the first data packet by the first node based on the mode 1B in the method 100, and details are not described herein for brevity.

Method for determining hop count of first transmission path by first node

Mode A3

For the process of determining the hop count of the first transmission path by the first node based on the mode A3, reference may be made to the process of determining the hop count of the first transmission path by the first node based on the mode 2A in the method 100, and details are not described here for brevity.

Mode A4

The first node is any one of the at least one wireless backhaul node; and, the method further comprises:

the first node receives a first message from a child node of the first node, where the first message includes information indicating a hop count, where the hop count in the first message is a hop count of the first transmission path, or the hop count in the first message is a number of nodes through which the first data packet passes during transmission on a second transmission path, where the second transmission path is a transmission path between the child node of the first node and the host node, where the transmission path starts from the child node of the first node and ends at the host node; and the number of the first and second groups,

the method further comprises the following steps:

For the process of determining the hop count of the first transmission path by the first node based on the mode A4, reference may be made to the process of determining the hop count of the first transmission path by the first node based on the mode 2B in the method 100, and details are not described herein for brevity.

Case B

The first parameter of the first packet includes: the total packet delay budget of the first packet and the hop count of a third transmission path, where the total packet delay budget of the first packet is a delay requirement for the first packet to be transmitted from the terminal-side device to the host node, the hop count of the third transmission path is the number of nodes through which the first packet passes during transmission on the third transmission path, and the third transmission path is a transmission path between the terminal-side device and the host node, where the transmission path takes the terminal-side device as a starting point and the host node as an ending point.

The third transmission path is any one of at least one transmission path between the terminal device and the host node, a first transmission path between the terminal device and the host node may overlap with the third transmission path, and when a multi-hop transmission path exists between the terminal device and the host node, the first transmission path and the third transmission path may also not overlap.

Optionally, after the first node determines the first parameter of the first packet, the unit PDB of the first packet may be further determined based on the first parameter of the first packet. Specifically, a ratio of the total PDB to the hop count of the third transmission path may be used as a unit PDB representing the first data packet, where a quotient of the total PDB divided by the hop count of the third transmission path indicates the unit PDB, a quotient of the hop count of the third transmission path divided by the total PDB indicates a parameter capable of representing the unit PDB, and a larger value of the parameter indicates a smaller unit PDB.

Optionally, the total PDB may be determined based on a difference between a PDB (denoted as PDB 1) used for indicating a delay requirement of the first data packet between the terminal device and the UPF network element and a PDB (denoted as PDB 2) used for indicating a delay requirement of the first data packet between the host node and the UPF network element, where PDB1 may be obtained from an existing preconfigured QoS parameter, and PDB2 may be obtained from a signaling sent by the host node to the first node. In another alternative implementation, the total PDB may be obtained based on the QoS parameters reconfigured in the embodiments of the present application.

Alternatively, the hop count of the third transmission path may be obtained from signaling sent by the host node.

Case C

The first parameter of the first packet includes a unit packet delay budget characterizing the first packet.

That is, the first parameter of the first packet is itself a unit packet delay budget for characterizing the first packet. By way of example and not limitation, the first node may obtain the first parameter of the first packet from signaling sent by the host node.

By way of example and not limitation, the host node may transmit the information indicating the unit PDB through Radio Resource Control (RRC) signaling, medium access control element (MAC CE) or other air interface signaling.

In the embodiment of the present application, as with the method 100, the first node may send the first packet in two ways (denoted as way C and way D), and a process of sending the first packet by the first node based on the first parameter is described below.

Mode C

The first node mapping the first data packet on a first data radio bearer DRB corresponding to the first parameter;

the first node sends the first data packet on the first DRB.

Alternatively, the DRB may be indicated by an identity for identifying the DRB.

By way of example and not limitation, the correspondence between a plurality of values of the first parameter and a plurality of DRBs will be described below with reference to table 7, and tables 1 and 2 described above. It should be understood that the correspondence shown in table 7 is only an illustrative example, and any form showing the correspondence is within the scope of protection of the embodiments of the present application.

When the first parameter includes the remaining PDB and the remaining hop count, reference may be made to the descriptions in table 1 and table 2 in the method 100, and details are not described here for brevity. When the first parameter includes the total PDB and the total hop count, the manner of the correspondence between the first parameter and the DRB (e.g., similar to the correspondence between two parameters and the DRB presented in table 1, respectively, or the correspondence between two parameters and the DRB in a set presented similar to table 2) may refer to the description of table 1 or table 2 in the method 100, except that the remaining PDB and the remaining hop count and the corresponding value range in table 1 or table 2 are replaced with the total PDB and the total hop count and the corresponding value range.

When the first parameter includes the unit PDB, or when the first parameter includes the remaining PDB and the remaining hop count and the unit PDB can be further determined, or when the first parameter includes the total PDB and the total hop count and the unit PDB can be further determined, the correspondence relationship between the unit PDB and the DRB in table 7 may be referred to. Where each unit PDB belongs to a particular range of values, it can also be considered that each DRB corresponds to a range of values associated with the unit PDB. For a first packet, if the unit PDB of the first packet satisfies a certain value range, the first packet is mapped to a DRB (i.e., a first DRB) corresponding to the data range. The first DRB may be a DRB identified by any one of the DRB IDs in table 7.

TABLE 7

DRB ID	Unit PDB	Unit PDB	……
				1	A<Unit PDB<B	C<Unit PDB<D	……
2	E<Unit PDB<F		……
				……	……	……	……

Like the method 100, in the embodiment of the present application, a new QoS parameter list may be formed by taking the first parameter as a newly added parameter in a 5QI QoS parameter list, where the first parameter includes any one of the remaining PDB and the remaining hop count or the total PDB and the total hop count or the unit PDB. And a plurality of values of each parameter in the QoS parameters including the first parameter correspond to a plurality of values of the 5QI, and a plurality of values of the 5QI correspond to a plurality of DRBs, so that the DRBs corresponding to the data packets can be determined based on the corresponding relationship between the modified QoS parameters and the 5QI and the corresponding relationship between the 5QI and the DRBs.

Optionally, regarding a manner of obtaining the correspondence between the first parameter of the first data packet and the first DRB, the first node receives correspondence information from a parent node or a host node of the first node, where the correspondence information is used to indicate the correspondence between the first parameter of the first data packet and the first DRB. For brevity, reference may be made to the related description in the method 100, and details are not repeated here.

Mode D

The first node sends the first data packet according to the first parameter, including:

the first node determines the priority of a first logical channel according to the first parameter, and the first data packet corresponds to the first logical channel;

Specifically, the first node determines a corresponding DRB according to the QoS parameter of the first data packet, determines a corresponding logical channel (denoted as a first logical channel) according to the DRB, and determines the priority of the first logical channel according to the first parameter of the first data packet. Thus, the first packet is transmitted according to the priority of the first logical channel.

When the first parameter includes the remaining PDB and the remaining hop count, as an example and not by way of limitation, the priority of the logical channel corresponding to the data packet with a larger value in the ratio of the remaining PDB/the remaining hop count is lower, and the priority of the logical channel corresponding to the data packet with a smaller value in the ratio of the remaining PDB/the remaining hop count is higher. Wherein, different values of the remaining PDB/the remaining hop count correspond to priorities of different logical channels.

When the first parameter includes the total PDB and the total hop count, as an example and not by way of limitation, the priority of the logical channel corresponding to the data packet with a higher value in the ratio of the total PDB/the total hop count is lower, and the priority of the logical channel corresponding to the data packet with a lower value in the ratio of the total PDB/the total hop count is higher. Wherein, different values of the total PDB/total hop count correspond to the priorities of different logical channels.

When the first parameter includes a unit PDB, by way of example and not limitation, a packet of the unit PDB having a larger value has a lower priority than a packet of the unit PDB having a smaller value.

In addition, when the first parameter includes the remaining PDB and the remaining hop count, or the first parameter includes the total hop count and the total PDB, the first parameter may be quantized to a quantization parameter for reducing implementation complexity and signaling overhead, and the corresponding relationship between the first parameter and the DRB may be simply expressed as the corresponding relationship between the quantization parameter and the DRB. The quantization parameter may be the unit PDB in the embodiment of the present application, or may be a quantization parameter generated based on another method. For example, the first parameter includes a remaining PDB and a remaining hop count, which may be determined by, by way of example and not limitation, c = a i + b j, where c represents the quantization parameter, i represents the remaining PDB, j represents the remaining hop count, and a and b are constants.

As described above, in actual transmission, the first node may fill the group packet with a group of logical channels including the first logical channel according to the priority order of all logical channels in the group of logical channels, and sequentially send the data packets in the group of logical channels according to the priority order. And when the priority of the first logical channel is higher, the first data packet is sent preferentially, and when the priority of the first logical channel is lower, the first data packet is sent in a delayed mode.

In the uplink scheduling of the method 200, optionally, the method further includes:

s231, the first node sends a third message to the parent node of the first node, where the third message includes information for characterizing the first parameter of the first packet.

S232, the father node of the first node schedules transmission resources for the first node according to the third message.

S233, the parent node of the first node transmits information indicating the transmission resource to the first node.

For brevity, for the related description, reference may be made to the description about uplink scheduling in the method 100, and details are not repeated here.

The embodiments of the present application are described in detail above with reference to fig. 3 and 4 from the perspective of uplink transmission, and the embodiments of the present application are described in detail below from the perspective of downlink transmission.

For convenience of description, the embodiment of the present application is described with the second node as an example of a node that needs to send a data packet in downlink transmission, the second data packet as any example of a downlink data packet, and the fourth transmission path as any transmission path between the second node and the terminal device. Wherein the second node is either the host node or any of the at least one wireless backhaul node.

In downlink transmission, in order to optimize performance of downlink scheduling, the second node may determine a second parameter of a second data packet, where the second parameter of the second data packet includes at least one of a remaining PDB of the second data packet, a unit PER, or a hop count of a fourth transmission path, and then perform downlink scheduling on the second data packet according to the second parameter of the second data packet. The remaining packet delay budget of the second packet is a delay requirement for the second packet to be transmitted from the second node to a terminal device, a unit PER of the second packet is a packet loss rate of the second packet between two adjacent nodes, a hop count of the fourth transmission path is a number of nodes through which the second packet passes during being transmitted on the fourth transmission path, and the fourth transmission path is a transmission path between the second node and the terminal device, where the transmission path takes the second node as a starting point and the terminal device as an ending point.

Specifically, when the remaining PDB of the second packet is small or the remaining hop count is large, it indicates that the second packet requires a low delay, and therefore, it is possible to preferentially schedule transmission resources for the second packet, and when the unit PER of the second packet is small, it indicates that the second packet requires high reliability, and therefore, it is preferable to allocate transmission resources having a high channel quality to the second packet. The second node performs downlink scheduling not only based on the second parameter of the second data packet, but also performs downlink scheduling in combination with other information (e.g., channel conditions, amount of data that the second node needs to transmit, etc.) when there are multiple data packets to be transmitted. The specific scheduling mode can be realized by a downlink scheduling algorithm.

For example, the plurality of data packets correspond to a plurality of logical channels, each logical channel corresponds to at least one data packet, and the downlink scheduling behavior may be determined by priorities of the plurality of logical channels, where the priority of each logical channel may be characterized by the first parameter of the data packet corresponding to the logical channel. In addition, when one logical channel corresponds to multiple data packets, the first parameter of the multiple data packets may be quantized into one quantization parameter, and for the sake of brevity, reference may be made to the description about the quantization parameter in uplink transmission.

Next, a detailed description will be given of a manner in which the second node determines the second parameter of the second packet on a case-by-case basis based on the content of the second parameter.

The second parameter of the second packet comprises a remaining PDB of the second packet

When the second node is the donor node, in an optional implementation manner, the second node may determine the remaining PDBs of the second packet based on a difference between the PDB (denoted as PDB 3) for indicating the delay requirement of the second packet between the terminal device and the UPF network element and the PDB (denoted as PDB 4) for indicating the delay requirement of the second packet between the donor node and the UPF network element, where PDB3 may be obtained from an existing preconfigured QoS parameter, and PDB4 may be obtained from a signaling sent by the donor node to the second node. In another alternative implementation, the remaining PDBs of the second packet may be obtained based on the QoS parameters reconfigured in the embodiment of the present application.

When the second node is any one of the at least one wireless backhaul node, optionally, the second node receives a message (denoted as a fourth message) from a parent node of the second node, where the fourth message is used to determine the remaining packet delay budget of the second packet.

The fourth message may include all information for determining the remaining PDBs of the second packet, or may include partial information for determining the remaining PDBs of the second packet.

Optionally, the fourth message may be carried in a header of a second data packet sent by a parent node of the second node. Specifically, the fourth message may be carried in a header of the second data packet in a Medium Access Control (MAC) layer, an RLC layer, or an adaptation layer.

By way of example and not limitation, the fourth message may also be a separate message, and the fourth message is sent by the parent node of the second node, which is not limited in this embodiment of the present application.

Next, a manner of determining, by the second node, the remaining PDBs of the second packet according to the fourth message will be further described according to the content in the fourth message.

Optionally, the fourth message includes time information (denoted as time information 2) and delay information (denoted as delay information 2), where the time information 2 is used to indicate a time when the parent node of the second node receives the second packet, and the delay information 2 is used to indicate a delay requirement (denoted as history remaining PDB 2) for the second packet to be transmitted from the parent node of the second node to the terminal device.

When the parent node of the second node is the host node, the time when the host node receives the second data packet is the time when the host node receives the second data packet from the mobile gateway.

In this case, the second node determines the remaining PDBs of the second packet according to the fourth message and the time when the second packet was received by the second node. Specifically, the time delay used in the process of transmitting the second data packet from the parent node of the second node to the terminal device is determined according to the difference between the time when the second data packet is received by the second node and the time when the second data packet is received by the parent node of the second node, and the remaining PDB of the second data packet is determined by the difference between the historical remaining PDB2 and the obtained time delay used in the process of transmitting the second data packet from the parent node of the second node to the terminal device.

For example, if the time when the parent node of the second node receives the second data packet is 8 o 'clock and 5ms, the historical remaining PDB2 is 15ms, and the time when the second node receives the second data packet is 8 o' clock and 10ms, then the remaining PDB =15- (10-5) =10 (ms) of the second data packet.

Optionally, the fourth message includes information indicating a time when the host node sends the second data packet.

In this case, the second node determines the remaining PDB of the second packet according to the fourth message, the time when the second packet is received by the second node, and the total PDB of the second packet, where the total PDB of the second packet is the delay requirement for the first packet to be transmitted from the host node to the terminal device. Specifically, the delay used by the second data packet to be transmitted from the host node to the second node is determined according to the difference between the time when the second data packet is received by the second node and the time when the second data packet is sent by the host node, and the remaining PDBs of the second data packet can be determined by subtracting the delay used by the second data packet to be transmitted from the host node to the second node from the total PDB.

For example, the total PDB is 20ms, the time for the second node to receive the second data packet is 8 o 'clock and 10ms, the time for the host node to send the second data packet is 8 o' clock, and the total PDB is 20ms, then the remaining PDB =20- (10-0) =10 (ms) of the second data packet.

The second parameter of the second packet includes a hop count of the fourth transmission path

Optionally, the hop count of the fourth transmission path is configured by the host node for the second node.

As an example and not by way of limitation, the host node may send, through RRC signaling, MAC CE, or other air interface signaling, information indicating the hop count of the fourth transmission path.

In addition, on the fourth transmission path, when there are other wireless backhaul nodes between the second node and the host node, the other wireless backhaul nodes may forward or transmit the information indicating the hop count of the fourth transmission path, which is sent by the host node, to the second node.

It should be understood that when multiple transmission paths exist between the second node and the host node, the host node configures the second node with the hop count of each transmission path.

Optionally, the second node determines the hop count (denoted as remaining hop count) on the fourth transmission path according to the hop count (denoted as total hop count) and the accumulated hop count of the transmission path (denoted as fifth transmission path) between the host node and the terminal device. The fifth transmission path is a path that takes the host node as a starting point and takes the terminal device as an end point, and all nodes configured on the fifth transmission path include all nodes configured on the fourth transmission path, that is, the nodes configured on the fifth transmission path include the terminal device, a node between the terminal device and the second node, a node between the second node and the host node, and the host node. The accumulated hop count is the number of nodes that the third packet has passed from the host node.

Specifically, when the second packet starts to be transmitted from the host node, information indicating the accumulated hop count needs to be additionally maintained every time the second packet passes through one node, and the accumulated hop count needs to be incremented every time the second packet passes through one node. In this way, the second node may determine the remaining hop count from the accumulated hop count and the total hop count.

For example, assuming that the communication system in fig. 2 is taken as an example, the number of all nodes on one transmission path is taken as the hop count of this transmission path, the second node is assumed to be IAB node C, the fifth transmission path is host node → IAB node B → IAB node C → terminal device, the fourth transmission path is IAB node C → terminal device, the total hop count is 4, when the third packet passes through the host node, the cumulative hop count is changed from 0 to 1, when the third packet passes through the IAB node B, the cumulative hop count is changed from 1 to 2, and for the IAB node C, the remaining hop count is 4-2=2.

Optionally, the second node receives a fifth message from a parent node of the second node, and determines the hop count of the fourth transmission path according to the fifth message, where the fifth message includes information indicating the hop count, and the hop count in the fifth message is the hop count of the fourth transmission path, or the hop count in the fifth message is the number of nodes through which the second data packet passes during transmission on a sixth transmission path, where the sixth transmission path is a transmission path between the parent node of the second node and the terminal device, where the parent node of the second node is a starting point and the terminal device is an end point.

Specifically, in a multi-hop and single-connection scenario, the host node or system may configure only the number of hops (referred to as a total number of hops for short) on one transmission path between the terminal device and the host node, and in a multi-hop and multi-connection scenario, the host node or system may configure the total number of hops on each of multiple transmission paths between the terminal device and the host node. And in the continuous downlink transmission, the second data packet is transmitted from the child node of the host node to the child node of the terminal host node, and continues to subtract 1 from the residual hop count to obtain the hop count of the transmission path between the child node of the host node and the terminal device. And so on, each node does so until the second packet is transmitted to the terminal device.

Taking the second node as an example, when the hop count in the fifth message is the hop count on the fourth transmission path, the parent node of the second node subtracts 1 from the hop count of the sixth transmission path to obtain the hop count of the fourth transmission path, and sends the hop count to the second node through the fifth message; when the number of hops in the fifth message is the number of hops on the sixth transmission path, the second node obtains the number of hops of the fourth transmission path by subtracting 1 from the number of hops of the sixth transmission path.

It should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The data transmission method for the wireless backhaul network according to the embodiment of the present application is described in detail above with reference to fig. 1 to 4, and the apparatus for the wireless backhaul network according to the embodiment of the present application is described in detail below with reference to fig. 5 to 6.

Fig. 5 illustrates an apparatus 500 for a wireless backhaul network according to an embodiment of the present application, where the apparatus 500 may be a first node, a child node of the first node, or a parent node of the first node, or may be a chip in the first node, a chip in the child node of the first node, or a chip in the parent node of the first node. The apparatus 500 comprises: a transceiving unit 510 and a processing unit 520.

In one possible implementation, the apparatus 500 is configured to execute the respective procedures and steps corresponding to the first node in the method 100.

A processing unit 520, configured to determine a first parameter of a first packet, where the first parameter of the first packet includes a remaining packet delay budget of the first packet, where the apparatus is any one of a terminal side device or the at least one wireless backhaul node, and the remaining packet delay budget of the first packet is a delay requirement for the first packet to be transmitted from the apparatus to the donor node;

the transceiving unit 510 is configured to transmit the first packet to a parent node of the device according to the first parameter of the first packet.

Wherein, the processing unit 520 is configured to perform the steps S110 and S120 in the method 100, and the transceiver unit 510 is configured to perform the steps S101, S131 and S133 in the method 100.

It should be understood that, the specific processes of the units for executing the corresponding steps described above have been described in detail in the above method embodiments, and are not described herein again for brevity.

In another possible implementation, the apparatus 500 is configured to perform the respective procedures and steps corresponding to the parent node of the first node in the method 100.

A transceiving unit 510, configured to receive a third message from a first node, where the third message includes information for characterizing a first parameter of a first data packet, where the first parameter of the first data packet includes a remaining packet delay budget of the first data packet, the first node is any one of a terminal side device or the at least one wireless backhaul node, and the remaining packet delay budget of the first data packet is a delay requirement for the first data packet to be transmitted from the first node to the host node;

a processing unit 520, configured to schedule transmission resources for the first node according to the third message;

the transceiving unit 510 is further configured to: the first data packet is received from the first node on the transmission resource.

The processing unit 520 may be configured to perform step S132 of the method 100, and the transceiver unit 510 may be configured to perform steps S131 and S133 of the method 100.

In another possible implementation manner, the apparatus 500 is configured to execute the respective procedures and steps corresponding to the child nodes of the first node in the method 100.

A processing unit 520, configured to generate a second message, where the second message is used to determine a remaining packet delay budget for a first packet, where the remaining packet delay budget for the first packet is a delay requirement for the first packet to be transmitted from a first node to the host node, and the first node is any one of a terminal-side device or the at least one wireless backhaul node;

a transceiving unit 510, configured to send a second message to the first node.

The transceiver unit 510 may be configured to perform step S101 in the method 100.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted here.

In another possible implementation manner, the apparatus 500 is configured to execute the respective procedures and steps corresponding to the first node in the method 200.

The processing unit 520 is configured to determine a first parameter of a first data packet, where the first parameter of the first data packet is used to determine a unit data packet delay budget for characterizing the first data packet, where the unit data packet delay budget of the first data packet represents a delay requirement for the first data packet to be transmitted between two adjacent nodes, and the apparatus is any one of a terminal-side device or the at least one wireless backhaul node;

The processing unit 520 may be configured to perform steps S210 and S220 in the method 200, and the transceiver unit 510 may be configured to perform steps S201, S202, S231, and S233 in the method 200.

It should be appreciated that the apparatus 500 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, it may be understood by those skilled in the art that the apparatus 500 may be specifically the first node, the parent node of the first node, or the child node apparatus 500 of the first node in the foregoing embodiment, and may be configured to perform each process and/or step corresponding to the first node, the parent node of the first node, or the child node of the first node in the foregoing method embodiment, and details are not described herein again to avoid repetition.

The apparatus 500 of each of the above aspects has a function of implementing corresponding steps executed by the first node, the parent node of the first node, or the child node of the first node in the above method; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more modules corresponding to the functions; for example, the transceiver unit may be replaced by a transmitter and a receiver, other units, such as a processing unit, may be replaced by a processor, and the transceiver operation and the related processing operation in the respective method embodiments are respectively performed. Furthermore, the transceiver unit in the apparatus 500 may also be composed of a transmitting unit and a receiving unit, and for performing operations related to reception, the function of the transceiver unit may be understood as a receiving operation performed by the receiving unit, and for performing operations related to transmission, the function of the transceiver unit may be understood as a transmitting operation performed by the transmitting unit.

In the embodiment of the present application, the apparatus in fig. 5 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, and is not limited herein.

Fig. 6 shows another apparatus 600 for a communication method of ethernet data according to an embodiment of the present application. It should be understood that the apparatus 600 may be embodied as the first node, the parent node of the first node, or the child node of the first node in the foregoing embodiments, and may be used to perform each step and/or flow corresponding to the first node, the parent node of the first node, or the child node of the first node in the foregoing embodiments of the method.

The apparatus 600 includes a processor 610, a transceiver 620, and a memory 630. Wherein, the processor 610, the transceiver 620 and the memory 630 are in communication with each other through an internal connection path, the processor 610 may implement the functions of the processing unit 520 in various possible implementations of the apparatus 500, and the transceiver 620 may implement the functions of the transceiver unit 510 in various possible implementations of the apparatus 500. The memory 630 is used for storing instructions, and the processor 610 is used for executing the instructions stored in the memory 630, or the processor 610 can call the stored instructions to realize the functions of the processor 520 in the apparatus 500, so as to control the transceiver 620 to transmit and/or receive signals.

Alternatively, the memory 630 may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 610 may be configured to execute instructions stored in the memory, and when the processor 610 executes the instructions stored in the memory, the processor 610 is configured to perform the steps and/or processes of the above-described method embodiments corresponding to the first node, a parent node of the first node, or a child node of the first node.

It should be understood that in the embodiment of the present application, the processor of the above apparatus may be a Central Processing Unit (CPU), and the processor may also be other general processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software elements in a processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in a memory, and a processor executes instructions in the memory, in combination with hardware thereof, to perform the steps of the above-described method. To avoid repetition, it is not described in detail here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

Claims

1. A data transmission method for a wireless backhaul network comprising at least one wireless backhaul node and a host node, the method comprising:

a first node determines first parameters of a first data packet, where the first parameters of the first data packet include a remaining data packet delay budget of the first data packet, a hop count of a first transmission path, and a unit packet loss rate of the first data packet, the first node is any one of a terminal side device or the at least one wireless backhaul node, the remaining data packet delay budget of the first data packet is a delay requirement for the first data packet to be transmitted from the first node to the host node, the hop count of the first transmission path is a number of nodes through which the first data packet passes during transmission on the first transmission path, the first transmission path is a transmission path between the first node and the host node, the transmission path having the first node as a starting point and the host node as an end point, and the unit packet loss rate of the first data packet is a packet loss rate of the first data packet between two adjacent nodes;

the first node sends the first data packet on the first DRB to a parent node of the first node.

2. The method of claim 1, further comprising:

3. The method according to claim 1 or 2, wherein the hop count of the first transmission path is configured for the first node by the host node.

4. The method according to claim 1 or 2, wherein the first node is any of the at least one wireless backhaul node; and, the method further comprises:

the first node determining a first parameter of a first packet, comprising:

5. The method according to claim 1 or 2, wherein the first node is any one of the at least one wireless backhaul node; and the number of the first and second groups,

the first node determining a first parameter of a first packet, comprising:

6. The method of claim 5, wherein the second message comprises time information and latency information, wherein the time information is used for indicating a time when the first data packet is received by the child node of the first node or a time when the first data packet is sent, and the latency information is used for indicating a latency requirement for the first data packet to be transmitted from the child node of the first node to the host node.

7. The method of claim 5, wherein the second message comprises information indicating a time when the terminal-side device sent the first data packet.

8. The method according to claim 1 or 2, characterized in that the method further comprises:

9. An apparatus for a wireless backhaul network comprising at least one wireless backhaul node and a host node, the apparatus comprising:

a processing unit, configured to determine first parameters of a first data packet, where the first parameters of the first data packet include a remaining data packet delay budget of the first data packet, a hop count of a first transmission path, and a unit packet loss rate of the first data packet, where the device is any one of a terminal side device or the at least one wireless backhaul node, the remaining data packet delay budget of the first data packet is a delay requirement for the first data packet to be transmitted from the device to the host node, the hop count of the first transmission path is a number of nodes through which the first data packet passes during transmission on the first transmission path, the first transmission path is a transmission path between the device and the host node, where the device is a starting point and the host node is an end point, and the unit packet loss rate of the first data packet is a packet loss rate between two adjacent nodes;

the processing unit is further configured to map the first data packet on a first data radio bearer, DRB, corresponding to a first parameter of the first data packet;

a transceiving unit to transmit the first packet to a parent node of the device on the first DRB.

10. The apparatus of claim 9, wherein the transceiver unit is further configured to:

receiving correspondence information from a parent node or a host node of the device, the correspondence information being used to indicate a correspondence between the first parameter of the first packet and the first DRB.

11. The apparatus according to claim 9 or 10, wherein the hop count of the first transmission path is configured for the apparatus by the host node.

12. The apparatus according to claim 9 or 10, wherein the apparatus is any one of the at least one wireless backhaul node; and (c) a second step of,

the transceiver unit is further configured to receive a first message from a child node of the apparatus, where the first message includes information indicating a hop count, where the hop count in the first message is a hop count of the first transmission path, or the hop count in the first message is a number of nodes through which the first packet passes during transmission on a second transmission path, where the second transmission path is a transmission path between the child node of the apparatus and the host node, where the transmission path starts from the child node of the apparatus and ends at the host node; and the number of the first and second groups,

the processing unit is specifically configured to:

and determining the hop count of the first transmission path according to the first message.

13. The apparatus according to claim 9 or 10, wherein the apparatus is any one of the at least one wireless backhaul node; and (c) a second step of,

the transceiver unit is further configured to: receiving a second message from a child node of the apparatus, the second message for determining a remaining packet delay budget for the first packet.

14. The apparatus of claim 13, wherein the second message comprises time information and latency information, wherein the time information indicates a time when the first packet is received or sent by a child node of the apparatus, and wherein the latency information indicates a latency requirement for the first packet to be transmitted from the child node of the apparatus to the host node.

15. The apparatus of claim 13, wherein the second message comprises information indicating a time when the terminal-side device sent the first data packet.

16. The apparatus according to claim 9 or 10, wherein the transceiver unit is further configured to:

sending a third message to a parent node of the apparatus, the third message including information characterizing a first parameter of the first packet.