CN111182581A - Flow control method, target node, node and donor node - Google Patents
Flow control method, target node, node and donor node Download PDFInfo
- Publication number
- CN111182581A CN111182581A CN201910114972.6A CN201910114972A CN111182581A CN 111182581 A CN111182581 A CN 111182581A CN 201910114972 A CN201910114972 A CN 201910114972A CN 111182581 A CN111182581 A CN 111182581A
- Authority
- CN
- China
- Prior art keywords
- node
- flow control
- target
- link
- donor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 72
- 230000011664 signaling Effects 0.000 claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims description 41
- 238000011144 upstream manufacturing Methods 0.000 claims description 34
- 238000004590 computer program Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 16
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a flow control method, a target node, a node and a donor node, wherein the flow control method comprises the following steps: under the condition that a target link between a first node and a second node is congested, a target node sends a flow control request to a donor node; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node; in the embodiment of the invention, only the node which detects the data congestion of the target link firstly initiates the flow control request to the donor node, so that the congestion flow control of the donor node to the target link can be realized, and the waste of signaling, resources and the like caused by the flow control request initiated by a plurality of nodes aiming at the congestion problem of the same link is avoided.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a flow control method, a target node, a node, and a donor node.
Background
In NR (New Radio, New air interface), an IAB (Integrated Access and Backhaul) node is introduced. The IAB node may extend the network coverage in a wireless cascading manner.
As shown in fig. 1, the terminal is connected to an IAB node 3, the IAB node 3 is connected to an IAB node 2 via a wireless backhaul (wireless backhaul), the IAB node 2 is connected to an IAB node 1 via a wireless backhaul, and similarly, the IAB node 1 is connected to an IAB donor node (donor) via a wireless backhaul. The IAB donor node is a node with a wired backhaul, which is connected to the Core Network (CN) via a wired link.
When the downlink is congested between the parent node and the child node (as shown in fig. 1, IAB node 2 is the parent node of IAB node 3, and IAB node 3 is the child node of IAB node 2), the parent node and the child node may respectively notify a CU (central unit) of the donor node to reduce the downlink data transmission rate. Where the notifying CU is an End-to-End (E2E) congestion notification mechanism. Thus, a CU of the donor node would receive two E2E flow control requests for congestion of the same link: a primary IAB node 3 flow control request and a primary IAB node 2 flow control request; this is not necessary.
Disclosure of Invention
The embodiment of the invention provides a flow control method, a target node, a node and a donor node, and aims to solve the problem of resource waste caused by triggering multiple flow control requests aiming at the congestion of the same link in the prior art.
In order to solve the technical problem, the invention is realized as follows: a fluidic method comprising:
under the condition that a target link between a first node and a second node is congested, a target node sends a flow control request to a donor node; the flow control request is used for informing a donor node that the target link has data congestion; the donor node is connected with a core network through a wired link;
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
The embodiment of the invention also provides a flow control method, which is applied to the upstream node of the target node and comprises the following steps:
receiving second indication information sent by a target node, wherein the second indication information is used for indicating that a target link between a first node and a second node does not obtain a congestion flow control or the target link is in a congestion state; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node;
and sending a flow control request to a donor node, wherein the flow control request is used for informing the donor node that the target link has data congestion, and the donor node is connected with a core network through a wired link.
The embodiment of the invention also provides a flow control method, which is applied to a donor node connected with a core network through a wired link and comprises the following steps:
receiving a flow control request, wherein the flow control request is used for indicating a target link between a first node and a second node to generate data congestion;
and processing the data to be transmitted according to the flow control request.
An embodiment of the present invention further provides a target node, including:
a first sending module, configured to send a flow control request to a donor node when a target link between a first node and a second node is congested; the flow control request is used for informing a donor node that the target link has data congestion; the donor node is connected with a core network through a wired link;
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
An embodiment of the present invention further provides a node, where the node is an upstream node of a target node, and the node includes:
a second receiving module, configured to receive second indication information sent by a target node, where the second indication information is used to indicate that a target link between a first node and a second node does not obtain a congestion flow control or that the target link is in a congestion state; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node;
a third sending module, configured to send a flow control request to a donor node, where the flow control request is used to notify the donor node that data congestion occurs in the target link, and the donor node is connected to a core network through a wired link.
An embodiment of the present invention further provides a donor node, including:
a fourth receiving module, configured to receive a flow control request, where the flow control request is used to indicate that a target link between a first node and a second node is congested with data;
and the processing module is used for processing the data to be transmitted according to the flow control request.
An embodiment of the present invention further provides a node, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the flow control method described above are implemented.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the flow control method described above.
In the embodiment of the invention, only the node which detects the data congestion of the target link firstly initiates the flow control request to the donor node, thereby realizing the congestion flow control of the donor node to the target link and avoiding the waste of signaling, resources and the like caused by the flow control request initiated by a plurality of nodes aiming at the congestion problem of the same link.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a communication system according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating one of the steps of a flow control method according to an embodiment of the present invention;
FIG. 4 is a flow chart illustrating a second step of the flow control method according to the embodiment of the present invention;
FIG. 5 is a flow chart illustrating a third step of a flow control method according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a target node according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a node according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a donor node according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
As shown in fig. 3, an embodiment of the present invention provides a flow control method, including:
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
Preferably, the occurrence of data congestion in the target link in the embodiment of the present invention specifically refers to the occurrence of downlink data congestion in the target link.
In this step, the flow control request is an end-to-end E2E flow control request, that is, when the target node first detects that congestion occurs, the target node notifies the donor node of the occurrence of data congestion on the target link through the flow control request. The donor node can correspondingly process the data to be transmitted according to the received flow control request.
It should be noted that the definition of the End-to-End (E2E) congestion notification mechanism is as follows:
as shown in fig. 2, when a node (e.g., IAB2-1) detects the occurrence of congestion, it informs the donor node: a problem occurs with the link to IAB 3-1. The donor node then reduces or stops the sending of the relevant data (data that needs to be passed to the IAB3-1 via the IAB 2-1). The congestion information of the IAB2-1 needs to be transmitted to the donor node through multi-hop transmission (IAB2-1- > IAB1- > donor node); therefore, it takes some time from when IAB2-1 finds congestion until the donor node adjusts (e.g., reduces the sending data rate) based on the congestion information. And even if the donor node reduces the rate, the data is still cached in the IAB1, and the data rate sent by the IAB1 to the IAB2-1 is not reduced until the donor node finishes sending the cached data.
The donor node is a node with a wired backhaul, and the donor node is connected with the core network CN through a wired link. The donor node may also be referred to as a relay base station or a donor node. The first node and the second node are relay nodes, the first node and the second node realize network coverage in a wireless cascade mode, and the first node and the second node are nodes with wireless backhaul.
Since the target node and the donor node may be connected directly or through a multi-hop connection (i.e. the target node and the donor node are connected through wireless concatenation of multiple nodes), as a preferred embodiment, step 301 includes:
and the target node sends a flow control request to the donor node through forwarding of N nodes, wherein N is an integer greater than or equal to 0.
For example, as shown in fig. 1, downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2, the IAB node 3 first detects the congestion, and the IAB node 3 is a target node. The IAB node 3 sends a flow control request to the IAB node 2, the IAB node 2 forwards the flow control request to the IAB node 1, and the IAB node 1 forwards the flow control request to the IAB donor node. In this case, N is equal to 2.
Optionally, the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
For example, the target node sends MAC CE signaling to the donor node, where the MAC CE signaling carries the flow control request. For another example, the target node sends RLC signaling to the donor node, where the RLC signaling carries the flow control request. For another example, the target node sends RRC signaling to the donor node, where the RRC signaling carries the flow control request.
As a preferred embodiment, the flow control request contains at least one of the following information:
information of a target link where data congestion occurs; for example, the identity of the target link;
data transmission rate information of a target link in which data congestion occurs;
caching information of the target node.
Further, in the case that the target node is a parent node of the first node and the second node, as a preferred embodiment, the method further includes:
receiving first indication information sent by a donor node, wherein the first indication information is used for indicating the target node to reduce the link data transmission rate between the target node and a downstream node;
and reducing the link data transmission rate between the target node and the downstream node according to the first indication information.
In other words, the role of the first indication information may also be referred to as: the node used for instructing the node receiving the first instruction information to reduce the link data transmission rate between the node and the downstream node. For example, if the node receiving the first indication information is node a, the first indication information is used to indicate that node a decreases the link data transmission rate with the downstream node of node a; for another example, if the node receiving the first indication information is a node B, the first indication information is used to instruct the node B to decrease the link data transmission rate with the node B downstream.
It should be noted that the node receiving the first indication information is an upstream node of the first node and the second node, and the upstream node is a target node that first finds that the target link is congested with downlink data.
For example, as shown in fig. 1, a parent node (or referred to as an upstream node) of the IAB node 3 and the IAB node 2 is the IAB node 2, and if downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2 first detects the congestion (i.e., the IAB node 2 is a target node), the IAB node 2 may receive the first indication information sent by the donor node and reduce a link data transmission rate between the IAB node 2 and the IAB node 3 (the IAB node 3 is a downstream node of the IAB node 2) according to the first indication information, thereby implementing congestion flow control or relieving link congestion. If the IAB node 3 first detects congestion (i.e., the IAB node 3 is the target node), since the IAB node 3 is a child node (or called a downstream node) of the IAB node 2, the donor node does not send the first indication information to the IAB node 3 (in other words, the IAB node 3 does not receive the first indication information).
Optionally, the first indication information may be carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
Further, in the foregoing embodiment of the present invention, after step 301, the method further includes:
if the target node detects that the target link does not obtain the congestion flow control within a preset time period after the flow control request is sent or the congestion degree of the target link is larger than a preset threshold value, the target node sends second indication information to an upstream node; the second indication information is used for indicating that the target link does not obtain the congestion flow control or that the target link is in the congestion state.
For example, as shown in fig. 1, downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2, the IAB node 3 first detects the congestion, and the IAB node 3 is a target node. IAB node 3 sends a flow control request to the IAB donor node. In a preset time period after the flow control request is sent, if a target link does not obtain a congestion flow control or the congestion degree of the target link is greater than a preset threshold value, a node initiating the flow control request (i.e., an IAB node 3) sends second indication information to an IAB node 2 (i.e., an upstream node of the IAB node 3), and the target link is indicated to not obtain the congestion flow control or to be in a congestion state through the second indication information.
Further, the upstream node of the target node receives the second indication information and can initiate a flow control request to the IAB donor node; that is, the upstream node of the target node informs the donor node of the target link congestion again through the flow control request. The donor node can correspondingly process the data to be transmitted according to the received flow control request.
In summary, in the embodiment of the present invention, only the node that detects that the target link has data congestion first initiates a flow control request to the donor node, which not only can implement congestion flow control of the donor node to the target link, but also avoids waste of signaling, resources, and the like caused by initiating flow control requests for congestion problems of the same link by multiple nodes.
As shown in fig. 4, an embodiment of the present invention further provides a flow control method applied to an upstream node of a target node, including:
In this step, the donor node is a node with a wired backhaul, and the donor node is connected to the core network CN through a wired link. The donor node may also be referred to as a relay base station or a donor node. The first node and the second node are relay nodes, the first node and the second node realize network coverage in a wireless cascade mode, and the first node and the second node are nodes with wireless backhaul.
In this step, the flow control request is an end-to-end E2E flow control request, and when the upstream node of the target node receives the second indication information sent by the target node, the upstream node of the target node may initiate the flow control request to the IAB donor node; that is, the upstream node of the target node informs the donor node of the target link congestion again through the flow control request. The donor node can correspondingly process the data to be transmitted according to the received flow control request.
Since the upstream node of the target node may be directly connected to the donor node, or may be connected through a multi-hop connection (that is, the connection between the upstream node of the target node and the donor node is achieved through wireless concatenation of multiple nodes), as a preferred embodiment, step 402 includes:
and sending a flow control request to the donor node through forwarding of M nodes, wherein M is an integer greater than or equal to 0.
For example, as shown in fig. 1, downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2, the IAB node 3 first detects the congestion, and the IAB node 3 is a target node. After the IAB node 3 sends the flow control request to the donor, if the congestion is not relieved, the IAB node 3 sends second indication information to the IAB node 2, and the IAB node 2 which receives the second indication information sends the flow control request to the donor node; specifically, the IAB node 2 sends a flow control request to the IAB node 1, and the IAB node 1 forwards the flow control request to the IAB donor node. In this case, M is equal to 1.
Optionally, the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
For example, the upstream node of the target node sends MAC CE signaling to the donor node, where the MAC CE signaling carries the flow control request. For another example, the upstream node of the target node sends RLC signaling to the donor node, where the RLC signaling carries the flow control request. For another example, the upstream node of the target node sends RRC signaling to the donor node, where the RRC signaling carries the flow control request.
As a preferred embodiment, the flow control request contains at least one of the following information:
information of a target link where data congestion occurs; for example, the identity of the target link;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
Further, in a case where the target node is a child node of the first node and the second node (which may also be referred to as an upstream node of the target node being a parent node of the first node and the second node), as a preferred embodiment, the method further includes:
receiving third indication information sent by a donor node, wherein the third indication information is used for indicating an upstream node of the target node to reduce a link data transmission rate with the target node;
and reducing the link data transmission rate between the upstream node of the target node and the target node according to the third indication information.
In other words, the role of the third indication information may also be referred to as: and the node used for instructing the node receiving the third instruction information to reduce the link data transmission rate between the node and the downstream node. For example, if the node receiving the third indication information is node a, the third indication information is used to indicate that node a decreases the link data transmission rate with the downstream node of node a; for another example, if the node receiving the third indication information is a node B, the third indication information is used to instruct the node B to decrease the link data transmission rate with the node B downstream.
For example, as shown in fig. 1, downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2, the IAB node 3 first detects the congestion, and the IAB node 3 is a target node. After the IAB node 3 sends the flow control request to the donor, if the congestion is not relieved, the IAB node 3 sends second indication information to the IAB node 2, and the IAB node 2 which receives the second indication information sends the flow control request to the donor node; in this case, the IAB node 2 may receive the third indication information sent by the donor node, and reduce the link data transmission rate between the IAB node 2 and the IAB node 3 according to the third indication information.
Optionally, the third indication information may be carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
In summary, in the embodiment of the present invention, only in the case of receiving the second indication information sent by the congested child node (also referred to as a congested downstream node), the congested parent node (also referred to as a congested upstream node) may initiate a flow control request to the donor node, so that congestion flow control of the target link by the donor node may be implemented.
As shown in fig. 5, an embodiment of the present invention further provides a flow control method applied to a donor node connected to a core network through a wired link, where the flow control method includes:
In this step, the flow control request may be a flow control request sent by a target node, which first detects that the target link has data congestion, in the first node and the second node, or a flow control request sent by an upstream node of the target node after receiving the second indication information.
As an alternative embodiment, step 501 comprises:
and reducing the link data transmission rate between the donor node and the downstream node according to the flow control request.
For example, as shown in fig. 1, the IAB donor node reduces the link data transmission rate between the IAB donor node and IAB node 1.
As another alternative, step 501 comprises:
sending fourth indication information to a preset node according to the flow control request, wherein the fourth indication information is used for indicating the preset node to reduce the link data transmission rate between the preset node and a downstream node; the preset node is a node directly connected with the donor node, or the preset node is a node connected with the donor node through multi-hop.
In other words, the function of the fourth indication information may also be referred to as: and the node used for instructing the node receiving the fourth indication information to reduce the link data transmission rate between the node and the downstream node. For example, if the node receiving the fourth indication information is node a, the fourth indication information is used to indicate that node a decreases the link data transmission rate with the downstream node of node a; for another example, if the node receiving the fourth indication information is a node B, the fourth indication information is used to instruct the node B to decrease the link data transmission rate with the node B downstream.
Note that the preset node is an upstream node (or referred to as a negative node) of a link in which data congestion occurs. For example, as shown in fig. 1, when downlink data congestion occurs in a link between the IAB node 3 and the IAB node 2, the node is preset to be the IAB node 2.
Optionally, the fourth indication information is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
Optionally, the flow control request includes at least one of the following information:
information of a target link where data congestion occurs; for example, the identity of the target link;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
In summary, in the embodiments of the present invention, the donor node performs corresponding processing on data to be transmitted according to the received request for notifying the donor node that the target link has data congestion flow control, so as to implement congestion flow control or alleviate link congestion.
As shown in fig. 6, an embodiment of the present invention further provides a target node 600, including:
a first sending module 601, configured to send a flow control request to a donor node when a target link between a first node and a second node is congested with data; the flow control request is used for informing a donor node that the target link has data congestion; the donor node is connected with a core network through a wired link;
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
Optionally, in the above embodiment of the present invention, the first sending module includes:
and the first sending submodule is used for sending the flow control request to the donor node through the forwarding of N nodes, wherein N is an integer greater than or equal to 0.
Optionally, in the above embodiment of the present invention, the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
Optionally, in the above embodiment of the present invention, the flow control request includes at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
caching information of the target node.
Optionally, in the foregoing embodiment of the present invention, the target node further includes:
a first receiving module, configured to receive first indication information sent by a donor node when a target node is a parent node of a first node and a second node, where the first indication information is used to indicate that the target node decreases a link data transmission rate with a downstream node;
and the first reducing module is used for reducing the link data transmission rate between the target node and the downstream node according to the first indication information.
Optionally, in the foregoing embodiment of the present invention, the target node further includes:
a second sending module, configured to send, by the target node, second indication information to an upstream node if the target node detects that the congestion flow control is not obtained for the target link within a preset time period after the flow control request is sent, or the congestion degree of the target link is greater than a preset threshold value; the second indication information is used for indicating that the target link does not obtain the congestion flow control or that the target link is in the congestion state.
In summary, in the embodiment of the present invention, only the node that detects that the target link has data congestion first initiates a flow control request to the donor node, which not only can implement congestion flow control of the donor node to the target link, but also avoids waste of signaling, resources, and the like caused by initiating flow control requests for congestion problems of the same link by multiple nodes.
It should be noted that the target node provided in the embodiments of the present invention is a target node capable of executing the flow control method, so that all embodiments of the flow control method are applicable to the target node, and can achieve the same or similar beneficial effects.
Preferably, an embodiment of the present invention further provides a target node, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the flow control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
As shown in fig. 7, an embodiment of the present invention further provides a node 700, where the node is an upstream node of a target node, and the node includes:
a second receiving module 701, configured to receive second indication information sent by a target node, where the second indication information is used to indicate that a target link between a first node and a second node does not obtain a congestion flow control or that the target link is in a congestion state; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node;
a third sending module 702, configured to send a flow control request to a donor node, where the flow control request is used to notify the donor node that data congestion occurs in the target link, and the donor node is connected to a core network through a wired link.
Optionally, in the foregoing embodiment of the present invention, the third sending module includes:
and the third sending submodule is used for sending the flow control request to the donor node through the forwarding of M nodes, wherein M is an integer larger than or equal to 0.
Optionally, in the above embodiment of the present invention, the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
Optionally, in the above embodiment of the present invention, the flow control request includes at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
Optionally, in the foregoing embodiment of the present invention, the node further includes:
a third receiving module, configured to receive third indication information sent by a donor node when the target node is a child node of the first node and the second node, where the third indication information is used to indicate an upstream node of the target node to reduce a link data transmission rate with the target node;
and a second reducing module, configured to reduce, according to the first indication information, a link data transmission rate between an upstream node of the target node and the target node.
In summary, in the embodiment of the present invention, only in the case of receiving the second indication information sent by the congested child node (also referred to as a congested downstream node), the congested parent node (also referred to as a congested upstream node) may initiate a flow control request to the donor node, so that congestion flow control of the target link by the donor node may be implemented.
It should be noted that the node provided in the embodiment of the present invention is a target node capable of executing the flow control method, so that all embodiments of the flow control method are applicable to the node, and can achieve the same or similar beneficial effects.
Preferably, an embodiment of the present invention further provides a node, including a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the flow control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
As shown in fig. 8, an embodiment of the present invention further provides a donor node 800, including:
a fourth receiving module 801, configured to receive a flow control request, where the flow control request is used to indicate that a target link between a first node and a second node is congested with data;
the processing module 802 is configured to process data to be transmitted according to the flow control request.
Optionally, in the foregoing embodiment of the present invention, the processing module includes:
and the first processing submodule is used for reducing the link data transmission rate between the donor node and the downstream node according to the flow control request.
Optionally, in the foregoing embodiment of the present invention, the processing module includes:
the second processing submodule is used for sending fourth indication information to a preset node according to the flow control request, wherein the fourth indication information is used for indicating the preset node to reduce the link data transmission rate between the preset node and a downstream node; the preset node is a node directly connected with the donor node, or the preset node is a node connected with the donor node through multi-hop.
Optionally, in the foregoing embodiment of the present invention, the fourth indication information is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
Optionally, in the above embodiment of the present invention, the flow control request includes at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
In summary, in the embodiments of the present invention, the donor node performs corresponding processing on data to be transmitted according to the received request for notifying the donor node that the target link has data congestion flow control, so as to implement congestion flow control or alleviate link congestion.
It should be noted that the donor node provided in the embodiments of the present invention is a target node capable of executing the flow control method, so that all embodiments of the flow control method are applicable to the donor node, and can achieve the same or similar beneficial effects.
Preferably, an embodiment of the present invention further provides a donor node, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the flow control method embodiment described above, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the flow control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention 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 invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (21)
1. A fluidic method, comprising:
under the condition that a target link between a first node and a second node is congested, a target node sends a flow control request to a donor node; the flow control request is used for informing a donor node that the target link has data congestion; the donor node is connected with a core network through a wired link;
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
2. The method of claim 1, wherein the target node sending a flow control request to a donor node, comprises:
and the target node sends a flow control request to the donor node through forwarding of N nodes, wherein N is an integer greater than or equal to 0.
3. The method of claim 1, wherein the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
4. The method of claim 1, wherein the flow control request comprises at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
caching information of the target node.
5. The method of claim 1, wherein in the case where the target node is a parent node of the first node and the second node, the method further comprises:
receiving first indication information sent by a donor node, wherein the first indication information is used for indicating the target node to reduce the link data transmission rate between the target node and a downstream node;
and reducing the link data transmission rate between the target node and the downstream node according to the first indication information.
6. The method according to claim 1 or 5, characterized in that the method further comprises:
if the target node detects that the target link does not obtain the congestion flow control within a preset time period after the flow control request is sent or the congestion degree of the target link is larger than a preset threshold value, the target node sends second indication information to an upstream node; the second indication information is used for indicating that the target link does not obtain the congestion flow control or that the target link is in the congestion state.
7. A flow control method is applied to an upstream node of a target node, and is characterized by comprising the following steps:
receiving second indication information sent by a target node, wherein the second indication information is used for indicating that a target link between a first node and a second node does not obtain a congestion flow control or the target link is in a congestion state; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node;
and sending a flow control request to a donor node, wherein the flow control request is used for informing the donor node that the target link has data congestion, and the donor node is connected with a core network through a wired link.
8. The method of claim 7, wherein sending a flow control request to a donor node comprises:
and sending a flow control request to the donor node through forwarding of M nodes, wherein M is an integer greater than or equal to 0.
9. The method of claim 7, wherein the flow control request is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
10. The method according to claim 7, wherein the flow control request contains at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
11. The method of claim 7, wherein in the case that the target node is a child node of the first node and the second node, the method further comprises:
receiving third indication information sent by a donor node, wherein the third indication information is used for indicating an upstream node of the target node to reduce a link data transmission rate with the target node;
and reducing the link data transmission rate between the upstream node of the target node and the target node according to the third indication information.
12. A flow control method applied to a donor node connected to a core network via a wired link, comprising:
receiving a flow control request, wherein the flow control request is used for indicating a target link between a first node and a second node to generate data congestion;
and processing the data to be transmitted according to the flow control request.
13. The method according to claim 12, wherein the processing the data to be transmitted according to the flow control request comprises:
and reducing the link data transmission rate between the donor node and the downstream node according to the flow control request.
14. The method according to claim 12 or 13, wherein the processing the data to be transmitted according to the flow control request comprises:
sending fourth indication information to a preset node according to the flow control request, wherein the fourth indication information is used for indicating the preset node to reduce the link data transmission rate between the preset node and a downstream node; the preset node is a node directly connected with the donor node, or the preset node is a node connected with the donor node through multi-hop.
15. The method of claim 14, wherein the fourth indication information is carried by at least one of the following signaling:
media access control layer control unit MAC CE signaling;
radio link control, RLC, signaling;
radio resource control, RRC, signaling.
16. The method according to claim 12, wherein the flow control request contains at least one of the following information:
information of a target link where data congestion occurs;
data transmission rate information of a target link in which data congestion occurs;
and in the first node and the second node, firstly, detecting the cache information of the node with the data congestion of the target link.
17. A target node, comprising:
a first sending module, configured to send a flow control request to a donor node when a target link between a first node and a second node is congested; the flow control request is used for informing a donor node that the target link has data congestion; the donor node is connected with a core network through a wired link;
the target node is a node, which is the first node of the first node and the second node and detects that the target link is congested with data.
18. A node that is upstream of a target node, comprising:
a second receiving module, configured to receive second indication information sent by a target node, where the second indication information is used to indicate that a target link between a first node and a second node does not obtain a congestion flow control or that the target link is in a congestion state; the target node is a node which firstly detects that the target link has data congestion, and is the first node and the second node;
a third sending module, configured to send a flow control request to a donor node, where the flow control request is used to notify the donor node that data congestion occurs in the target link, and the donor node is connected to a core network through a wired link.
19. A donor node, comprising:
a fourth receiving module, configured to receive a flow control request, where the flow control request is used to indicate that a target link between a first node and a second node is congested with data;
and the processing module is used for processing the data to be transmitted according to the flow control request.
20. A node comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the flow control method according to any one of claims 1 to 6; or, the computer program when being executed by the processor realizes the steps of the fluidic method according to any one of claims 7 to 11; alternatively, the computer program realizes the steps of the flow control method according to any one of claims 12 to 16 when executed by the processor.
21. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the flow control method according to one of claims 1 to 6; or, the computer program when being executed by a processor realizes the steps of the fluidic method according to any one of claims 7 to 11; alternatively, the computer program realizes the steps of the flow control method according to any one of claims 12 to 16 when executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114972.6A CN111182581B (en) | 2019-02-14 | 2019-02-14 | Flow control method, target node, node and donor node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910114972.6A CN111182581B (en) | 2019-02-14 | 2019-02-14 | Flow control method, target node, node and donor node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111182581A true CN111182581A (en) | 2020-05-19 |
| CN111182581B CN111182581B (en) | 2023-12-01 |
Family
ID=70657410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910114972.6A Active CN111182581B (en) | 2019-02-14 | 2019-02-14 | Flow control method, target node, node and donor node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111182581B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022082565A1 (en) * | 2020-10-22 | 2022-04-28 | Zte Corporation | Methods and devices for enhancing integrated access backhaul networks for new radio |
| WO2022183945A1 (en) * | 2021-03-01 | 2022-09-09 | 索尼集团公司 | Electronic device, wireless communication method, and computer readable storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030076781A1 (en) * | 2001-10-18 | 2003-04-24 | Nec Corporation | Congestion control for communication |
| WO2008049376A1 (en) * | 2006-10-25 | 2008-05-02 | Huawei Technologies Co., Ltd. | Processing location update request method, network entity, congestion control method and apparatus |
| CN102196502A (en) * | 2011-04-06 | 2011-09-21 | 东南大学 | Congestion control method for wireless sensor network |
| CN104270790A (en) * | 2014-10-23 | 2015-01-07 | 湘潭大学 | Congestion control method based on equitable distribution of communication channel |
| US20170257319A1 (en) * | 2016-03-07 | 2017-09-07 | Evelyne ROCH | Control channel compression upon congestion detection |
-
2019
- 2019-02-14 CN CN201910114972.6A patent/CN111182581B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030076781A1 (en) * | 2001-10-18 | 2003-04-24 | Nec Corporation | Congestion control for communication |
| WO2008049376A1 (en) * | 2006-10-25 | 2008-05-02 | Huawei Technologies Co., Ltd. | Processing location update request method, network entity, congestion control method and apparatus |
| CN102196502A (en) * | 2011-04-06 | 2011-09-21 | 东南大学 | Congestion control method for wireless sensor network |
| CN104270790A (en) * | 2014-10-23 | 2015-01-07 | 湘潭大学 | Congestion control method based on equitable distribution of communication channel |
| US20170257319A1 (en) * | 2016-03-07 | 2017-09-07 | Evelyne ROCH | Control channel compression upon congestion detection |
| CN108781190A (en) * | 2016-03-07 | 2018-11-09 | 华为技术有限公司 | Control channel compression based on congestion detection |
Non-Patent Citations (2)
| Title |
|---|
| 佘明辉;赵东风;: "基于窗口式流量和拥塞控制的分析", 贵州大学学报(自然科学版), no. 05 * |
| 谭梁镌;: "拥塞控制专利技术综述", 中国新通信, no. 04 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022082565A1 (en) * | 2020-10-22 | 2022-04-28 | Zte Corporation | Methods and devices for enhancing integrated access backhaul networks for new radio |
| WO2022183945A1 (en) * | 2021-03-01 | 2022-09-09 | 索尼集团公司 | Electronic device, wireless communication method, and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111182581B (en) | 2023-12-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11516880B2 (en) | Session processing method and apparatus | |
| US11064421B2 (en) | Radio access control method, apparatus, and system | |
| CN109548109B (en) | Processing method and device for mismatching of UE and network state and storage medium | |
| CN113747521B (en) | Network switching method, device, communication equipment and system | |
| WO2021031022A1 (en) | Link switching method and communication device | |
| EP3821680B1 (en) | Multi-hop relaying in a mobile communication network | |
| KR20170050542A (en) | Method and apparatus for transmitting and receiving paging message | |
| CN110859012A (en) | Method, device and system for rate control | |
| EP4120735B1 (en) | Data transmission methods, target base station and anchor base station | |
| US20210368473A1 (en) | Method of sending downlink information, access and mobility management function entity and network function entity | |
| CN111182581A (en) | Flow control method, target node, node and donor node | |
| JP2022548186A (en) | Session establishment method and device | |
| KR20190043079A (en) | Method for notificating downlink data in network, network triggered service request method and network entity perorming the same | |
| WO2022143539A1 (en) | Network access trigger method and apparatus, and network-side device | |
| US12009980B2 (en) | Method and device for configuring terminal policy, terminal, base station and storage medium | |
| US11570770B2 (en) | Method and device for requesting for and scheduling relay resource | |
| JP2024502890A (en) | Information processing method, terminal, network equipment and readable storage medium | |
| JP2024502582A (en) | Signal transmission and reception methods, devices and communication systems | |
| US9622113B2 (en) | Base station apparatus and radio access system | |
| CN113518379B (en) | Information processing method and device and communication equipment | |
| US20230199477A1 (en) | Information transmission method and apparatus, communications device, and storage medium | |
| US20210168219A1 (en) | Relay device, data relay method and program | |
| CN114339905A (en) | Information processing method, device, terminal, network side equipment and storage medium | |
| CN115606247A (en) | Wireless communication method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |