CN111343669A - Message scheduling method and device - Google Patents
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- H—ELECTRICITY
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/26—Flow control; Congestion control using explicit feedback to the source, e.g. choke packets
- H04L47/263—Rate modification at the source after receiving feedback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/27—Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a message scheduling method and a device, wherein the method comprises the following steps: if the speed back pressure sending module of the base station detects that the number of the messages in the message queue meets a preset first condition, determining that the data flow of the messages meeting a preset second condition in the message queue is a congestion flow, wherein each user equipment connected with the base station is provided with the message queue, determining the user equipment sending the congestion flow and the user equipment receiving the congestion flow, the user equipment receiving the congestion flow is the user equipment connected with the base station, determining the reverse flow sent by the user equipment receiving the congestion flow to the user equipment sending the congestion flow, and modifying an identification character window value in the reverse flow so that the user equipment sending the congestion flow reduces the message sending speed according to the identification character window value. The method provided by the embodiment of the invention can indicate the user equipment sending the congestion flow to reduce the message sending speed, thereby reducing the flow congestion of the base station and improving the message scheduling efficiency.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a message scheduling method and a message scheduling device.
Background
In a 5G (5th-Generation, fifth Generation mobile communication technology) network environment, the network speed can reach several G at most, and the speed of the network speed is close to that of a data center server. Any 5G terminal can not only be used as a client to obtain information, but also can provide services to the outside, or can be used as both a client and a server. In a 5G access network, traffic models will become more and more complex, and there may be a model in which multiple 5G UEs (User Equipment, e.g., mobile terminals) access one UE. Thus, a 5G base station connected to a visited UE may become a congestion point of traffic, and current 5G data communication also adopts an IP forwarding mode, and the basic characteristic of IP forwarding is that when congestion occurs at a point and exceeds its processing capability, a basic processing mechanism is to use a strategy of message discarding to rely on TCP (Transmission control protocol) retransmission, but the retransmission may affect service efficiency. How to avoid network congestion message loss through 5G scheduling is a problem.
Disclosure of Invention
Therefore, the invention provides a message scheduling method and a message scheduling device, which are used for solving the problem of base station flow congestion caused by the fact that the period of sending messages by a message sending end is shorter than the period of receiving messages by a message receiving end in the prior art.
In order to achieve the above object, a first aspect of the present invention provides a packet scheduling method, including:
if the speed back pressure sending module of the base station detects that the number of the messages in the message queue meets a preset first condition, determining that the data flow of the message which meets a preset second condition in the message queue is a congestion flow; each user equipment connected with the base station is configured with a message queue;
determining user equipment sending the congestion flow and user equipment receiving the congestion flow; the user equipment receiving the congestion flow is the user equipment connected with the base station;
determining a reverse flow sent by the user equipment receiving the congestion flow to the user equipment sending the congestion flow;
and modifying the confirmation character window value in the reverse flow so that the user equipment sending the congestion flow reduces the message sending speed according to the confirmation character window value.
Preferably, the step of determining that the number of packets in the packet queue satisfies a preset first condition includes: the number of the messages in the message queue is larger than a preset threshold value.
Preferably, the messages in the message queue meeting the preset second condition include: and determining the messages exceeding the preset threshold value in the message alignment according to the message receiving time.
Preferably, whether the number of the messages in the message queue meets a preset first condition is detected according to a preset period;
the determining of the user equipment which sends the message meeting the preset second condition in the message queue includes: and if a plurality of messages exceeding the preset threshold value exist in the message queue, respectively determining the user equipment for sending each message exceeding the preset threshold value.
A second aspect of the present invention provides a method for scheduling packets, including:
receiving a reverse flow sent by a base station;
and reducing the message sending speed according to the confirmed character window value in the reverse flow.
The third aspect of the present invention provides a base station, which includes a speed backpressure sending module, a determining module and a modifying module;
the speed back-pressure sending module is used for detecting whether the number of the messages in the message queue meets a preset first condition or not;
the determining module is configured to determine, if it is detected that the number of packets in a packet queue meets a preset first condition, that a data flow in which packets meeting a preset second condition in the packet queue are located is a congestion flow, where each user equipment connected to a base station is configured with a packet queue, determine a user equipment that sends the congestion flow and a user equipment that receives the congestion flow, where the user equipment that receives the congestion flow is the user equipment connected to the base station, and determine a reverse flow that the user equipment that receives the congestion flow sends to the user equipment that sends the congestion flow;
and the modification module is used for modifying the confirmation character window value in the reverse flow so as to enable the user equipment sending the congestion flow to reduce the message sending speed according to the confirmation character window value.
Preferably, the step of determining that the number of packets in the packet queue satisfies a preset first condition includes: the number of the messages in the message queue is larger than a preset threshold value.
Preferably, the messages in the message queue meeting the preset second condition include: and determining the messages exceeding the preset threshold value in the message alignment according to the message receiving time.
Preferably, whether the number of the messages in the message queue meets a preset first condition is detected according to a preset period;
the determining module is configured to determine, if there are multiple messages in the message queue that exceed the preset threshold, the user equipment that sends each message that exceeds the preset threshold, respectively.
A fourth aspect of the present invention provides a user equipment, which includes a receiving module and a processing module;
the receiving module is used for receiving the reverse flow sent by the base station;
and the processing module is used for reducing the message sending speed according to the confirmed character window value in the reverse flow.
In the message scheduling method provided in the embodiment of the present invention, if the speed backpressure sending module of the base station detects that the number of messages in the message queue satisfies the preset first condition, it is determined that a data flow in which the messages satisfying the preset second condition are located in the message queue is a congestion flow, where each user equipment connected to the base station is configured with a message queue, it is determined that a user equipment sending the congestion flow and a user equipment receiving the congestion flow are, the user equipment receiving the congestion flow is the user equipment connected to the base station, it is determined that the user equipment receiving the congestion flow sends a reverse flow to the user equipment sending the congestion flow, and an acknowledgment character window value in the reverse flow is modified, so that the user equipment sending the congestion flow reduces a message sending speed according to the acknowledgment character window value. The method provided by the embodiment of the invention can determine the congestion flow according to the number of the messages in the message queue and the messages meeting the preset second condition, further determine the reverse flow according to the congestion flow, and instruct the user equipment sending the congestion flow to reduce the message sending speed by modifying the determination character window value in the reverse flow, thereby reducing the flow congestion of the base station and improving the message scheduling efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a first schematic flow chart of a message scheduling method according to an embodiment of the present invention;
fig. 2 is a second schematic flow chart of a message scheduling method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a 5G base station according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The fifth Generation Mobile communication technology (5th Generation Mobile networks, 5G) is The latest Generation cellular Mobile communication technology, namely 4G (The 4th Generation Mobile communication technology), The fourth Generation Mobile communication technology such as LTE-a (Long Term Evolution-Advanced) and WiMax (World Interoperability for Microwave Access)), 3G (The third Generation Mobile communication technology such as UMTS (Universal Mobile Telecommunications System), LTE (Long Term Evolution), and 2G (Second Generation Mobile communication technology such as GSM (Global System for Mobile Communications)). The performance goals of 5G are high data rates, reduced latency, energy savings, reduced cost, increased system capacity, and large-scale device connectivity. The first phase of the 5G specification in Release-15 was to accommodate early commercial deployments. The second phase of Release-16 will be completed in month 4 of 2020 and is submitted to the International Telecommunication Union (ITU) as a candidate for IMT-2020(5G) technology. The ITU IMT-2020 specification requires speeds up to 20Gbit/s, and can implement wide channel bandwidth and large capacity MIMO (multiple-in multiple-out).
31.10.2019, three operators publish 5G commercial packages and formally bring on the line 5G commercial packages on 1.11. 5G mobile networks like earlier 2G, 3G and 4G mobile networks, 5G networks are digital cellular networks in which the service area covered by a provider is divided into a number of small geographical areas called cells. Analog signals representing sound and images are digitized in the handset, converted by an analog-to-digital converter and transmitted as a bit stream. All 5G wireless devices in a cell communicate by radio waves with local antenna arrays and low power autonomous transceivers (transmitters and receivers) in the cell. The transceiver allocates frequency channels from a common pool of frequencies that are reusable in geographically separated cells. The local antenna is connected to the telephone network and the internet through a high bandwidth fiber or wireless backhaul connection. As with existing handsets, when a user passes from one cell to another, their mobile device will automatically "switch" to the antenna in the new cell.
The main advantage of 5G networks is that the data transmission rate is much higher than previous cellular networks, up to 10Gbit/s, faster than current wired internet, 100 times faster than previous 4G LTE cellular networks. Another advantage is lower network delay (faster response time), below 1 millisecond, and 30-70 milliseconds for 4G. Due to faster data transmission, the 5G network will not only serve the handset, but will also become a general home and office network provider, competing with the cable network provider. Previous cellular networks provided low data rate internet access suitable for cell phones, but a cell phone tower could not economically provide sufficient bandwidth as a general internet provider for home computers.
In 5G, services such as audio, video and images facing large-scale users are rapidly increased, and the explosive increase of network traffic can greatly influence the quality of service for users to access the Internet. How to effectively distribute large-flow service content and reduce the time delay of information acquisition of users becomes a big problem for network operators and content providers. The problem cannot be solved by merely increasing the bandwidth, and is also influenced by factors such as route blocking and delay in transmission, processing capacity of a web server, and the like, and the problem is closely related to the distance between user servers.
As shown in fig. 1, a method for scheduling a packet according to an embodiment of the present invention may include the following steps:
step 11, if the speed back pressure sending module of the base station detects that the number of the messages in the message queue meets a preset first condition, determining that the data flow of the message meeting a preset second condition in the message queue is a congestion flow; and each user equipment connected with the base station is provided with a message queue.
In the embodiment of the present invention, a plurality of User Equipments (UEs) are connected to the base station, and then the base station may configure one or more message queues for the received messages of each UE locally according to the terminal identifier of each UE. The message sent to a certain UE by the sending end enters the message queue of the UE, and the message is forwarded to the UE by the base station according to the first-in first-out principle. The base station may be a 5G base station or another base station such as a 4G base station.
The base station may locally set a functional module for sending speed backpressure to the sending end, that is, a speed backpressure sending module, where the functional module may detect whether the number of messages in each message queue meets a preset first condition, and after the speed backpressure sending module of the base station is started, when it is detected that the number of messages in the message queue meets the preset first condition, it indicates that the speed at which the UE corresponding to the message queue receives the messages is less than the speed at which the sending end sends the messages, the functional module may further determine the messages in the message queue that meet a preset second condition, further determine a flow where the messages in the message queue that meet the preset second condition are located, and define the data flow as a congestion flow.
Step 12, determining user equipment sending the congestion flow and user equipment receiving the congestion flow; the user equipment receiving the congestion flow is the user equipment connected with the base station.
In this step, when the speed of sending the message by the sending end is greater than the speed of receiving the message by the UE, the base station may directly determine the sending end sending the congestion flow and the UE receiving the congestion flow according to the congestion flow, where the UE receiving the congestion flow is the UE connected to the base station.
And step 13, determining the reverse flow sent by the user equipment receiving the congestion flow to the user equipment sending the congestion flow.
In this step, the 5G base station may find a reverse flow matching the congested flow through the base station, where the reverse flow is returned to the UE that sent the congested flow.
And step 14, modifying the confirmation character window value in the reverse flow so that the user equipment sending the congestion flow reduces the message sending speed according to the confirmation character window value.
In this step, the base station may narrow an Acknowledgement Character (ACK) window value in the reverse flow. After receiving the reverse flow, the UE sending the congested flow will automatically reduce its sending speed according to the reduced window value of the UE. Therefore, in the subsequent communication, as the message sending speed of the message sending end is reduced, the base station receives fewer messages, and the congestion is relieved.
As can be seen from steps 11 to 14, in the message scheduling method provided in the embodiment of the present invention, if the speed backpressure sending module of the base station detects that the number of the messages in the message queue satisfies the preset first condition, it is determined that the data flow in which the messages satisfying the preset second condition are located in the message queue is a congestion flow, where each of the user equipments connected to the base station is configured with the message queue, it is determined that the user equipment sending the congestion flow and the user equipment receiving the congestion flow are, the user equipment receiving the congestion flow is the user equipment connected to the base station, it is determined that the user equipment receiving the congestion flow sends the reverse flow to the user equipment sending the congestion flow, and an acknowledgment character window value in the reverse flow is modified, so that the user equipment sending the congestion flow reduces the message sending speed according to the acknowledgment character window value. The method provided by the embodiment of the invention can determine the congestion flow according to the number of the messages in the message queue and the messages meeting the preset second condition, further determine the reverse flow according to the congestion flow, and instruct the user equipment sending the congestion flow to reduce the message sending speed by modifying the determination character window value in the reverse flow, thereby reducing the flow congestion of the base station and improving the message scheduling efficiency.
In some embodiments, the step of determining that the number of packets in the packet queue satisfies a preset first condition may include: the number of the messages in the message queue is larger than a preset threshold value.
In the embodiment of the present invention, the base station may set a preset threshold for the number of messages in the message queue of the UE, and when the number of messages in the message queue is greater than the preset threshold, it indicates that the number of messages in the message queue exceeds the upper limit of the message queue. Generally, if the number of messages in the message queue exceeds a threshold, the message queue will discard the received messages, and to avoid message loss, the base station may detect whether the number of messages in the message queue meets a preset first condition, so as to perform message scheduling according to the detection result.
In some embodiments, the packets in the packet queue that satisfy the preset second condition may include: and determining the messages exceeding a preset threshold value in the message alignment according to the message receiving time. That is, the packet satisfying the second condition is a packet received after the number of packets in the packet alignment is greater than the threshold.
In the embodiment of the present invention, whether the message satisfies the preset second condition is related to the receiving time of the message and whether the message exceeds the preset threshold.
In some embodiments, the base station may detect whether the number of the messages in the message queue satisfies a preset first condition according to a preset period, and correspondingly, the determining the ue that sends the message that satisfies a preset second condition in the message queue may include: and if a plurality of messages exceeding the preset threshold value exist in the message queue, respectively determining the user equipment which sends each message exceeding the preset threshold value.
In the embodiment of the invention, the base station can periodically detect the number of the messages in the message queue. It should be noted that, at this time, the message that satisfies the preset second condition in the message queue may be a message whose receiving time is within the current detection period and exceeds the preset threshold. When there are a plurality of messages exceeding the preset threshold in the message queue, it is necessary to determine the sending ends for sending these messages respectively.
As shown in fig. 2, the method for scheduling a packet according to the embodiment of the present invention may include the following steps:
and step 21, receiving the reverse flow sent by the base station.
And step 22, reducing the message sending speed according to the confirmed character window value in the reverse flow.
It can be seen from the foregoing steps 21-22 that, in the message scheduling method provided in the embodiment of the present invention, the reverse flow sent by the base station is received, and the message sending speed is reduced according to the confirmation character window value in the reverse flow. The message scheduling method provided by the embodiment of the invention can enable the message sending end to reduce the message sending speed according to the confirmed character window value in the reverse flow sent by the base station, thereby reducing the sending quantity of the messages, further relieving the flow congestion of the base station and improving the message scheduling efficiency.
It should be noted that the base station may also instruct the message sending end to reduce the message sending speed, and the message sending end reduces the message sending speed by itself, but compared with the case that the base station instructs the sending end to reduce the message sending speed by reducing the confirmation character window value according to the congestion condition of the base station, the efficiency of message scheduling may be lower.
Based on the same technical concept, an embodiment of the present invention further provides a base station, as shown in fig. 3, where the base station includes a speed backpressure sending module 101, a determining module 102, and a modifying module 103.
The speed back-pressure sending module 101 is configured to detect whether the number of the messages in the message queue meets a preset first condition.
The determining module 102 is configured to determine, if it is detected that the number of the packets in the packet queue meets a preset first condition, that a data flow in which the packets meeting a preset second condition in the packet queue are located is a congestion flow, where each of the user equipments connected to the base station is configured with the packet queue, determine a user equipment that sends the congestion flow and a user equipment that receives the congestion flow, where the user equipment that receives the congestion flow is the user equipment connected to the base station, and determine a reverse flow that the user equipment that receives the congestion flow sends to the user equipment that sends the congestion flow.
The modifying module 103 is configured to modify the value of the confirmation character window in the reverse flow, so that the ue sending the congestion flow decreases the message sending speed according to the value of the confirmation character window.
In some embodiments, the number of packets in the packet queue satisfies a preset first condition, which includes: the number of the messages in the message queue is larger than a preset threshold value.
In some embodiments, the messages in the message queue meeting the second condition include: and determining the messages exceeding a preset threshold value in the message alignment according to the message receiving time.
In some embodiments, whether the number of messages in the message queue meets a preset first condition is detected according to a preset period. The determining module 102 is configured to, if there are multiple messages in the message queue that exceed the preset threshold, respectively determine the user equipment that sends each message that exceeds the preset threshold.
An embodiment of the present invention further provides a user equipment, as shown in fig. 4, the user equipment includes a receiving module 201 and a processing module 202.
The receiving module 201 is configured to receive a reverse flow sent by a base station.
The processing module 202 is configured to reduce the message sending speed according to the window value of the acknowledgement character in the reverse flow.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A message scheduling method applied to a base station is characterized by comprising the following steps:
if the speed back pressure sending module of the base station detects that the number of the messages in the message queue meets a preset first condition, determining that the data flow of the message which meets a preset second condition in the message queue is a congestion flow; each user equipment connected with the base station is configured with a message queue;
determining user equipment sending the congestion flow and user equipment receiving the congestion flow; the user equipment receiving the congestion flow is the user equipment connected with the base station;
determining a reverse flow sent by the user equipment receiving the congestion flow to the user equipment sending the congestion flow;
and modifying the confirmation character window value in the reverse flow so that the user equipment sending the congestion flow reduces the message sending speed according to the confirmation character window value.
2. The method of claim 1, wherein the number of packets in the packet queue satisfies a preset first condition, comprising: the number of the messages in the message queue is larger than a preset threshold value.
3. The method according to claim 2, wherein the packets in the packet queue meeting the second condition include: and determining the messages exceeding the preset threshold value in the message alignment according to the message receiving time.
4. The method according to claim 3, wherein whether the number of messages in the message queue meets a preset first condition is detected according to a preset period;
the determining of the user equipment which sends the message meeting the preset second condition in the message queue includes: and if a plurality of messages exceeding the preset threshold value exist in the message queue, respectively determining the user equipment for sending each message exceeding the preset threshold value.
5. A message scheduling method applied to user equipment is characterized by comprising the following steps:
receiving a reverse flow sent by a base station;
and reducing the message sending speed according to the confirmed character window value in the reverse flow.
6. A base station is characterized by comprising a speed back pressure sending module, a determining module and a modifying module;
the speed back-pressure sending module is used for detecting whether the number of the messages in the message queue meets a preset first condition or not;
the determining module is configured to determine, if it is detected that the number of packets in a packet queue meets a preset first condition, that a data flow in which packets meeting a preset second condition in the packet queue are located is a congestion flow, where each user equipment connected to a base station is configured with a packet queue, determine a user equipment that sends the congestion flow and a user equipment that receives the congestion flow, where the user equipment that receives the congestion flow is the user equipment connected to the base station, and determine a reverse flow that the user equipment that receives the congestion flow sends to the user equipment that sends the congestion flow;
and the modification module is used for modifying the confirmation character window value in the reverse flow so as to enable the user equipment sending the congestion flow to reduce the message sending speed according to the confirmation character window value.
7. The base station of claim 6, wherein the number of messages in the message queue meeting a predetermined first condition comprises: the number of the messages in the message queue is larger than a preset threshold value.
8. The base station of claim 7, wherein the messages in the message queue meeting the second condition include: and determining the messages exceeding the preset threshold value in the message alignment according to the message receiving time.
9. The base station of claim 8, wherein the method comprises detecting whether the number of messages in the message queue meets a preset first condition according to a preset period;
the determining module is configured to determine, if there are multiple messages in the message queue that exceed the preset threshold, the user equipment that sends each message that exceeds the preset threshold, respectively.
10. A user equipment, characterized in that the user equipment comprises a receiving module and a processing module;
the receiving module is used for receiving the reverse flow sent by the base station;
and the processing module is used for reducing the message sending speed according to the confirmed character window value in the reverse flow.
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