CN112866125B - Downlink data transmission method and device - Google Patents

Downlink data transmission method and device Download PDF

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CN112866125B
CN112866125B CN201911175241.9A CN201911175241A CN112866125B CN 112866125 B CN112866125 B CN 112866125B CN 201911175241 A CN201911175241 A CN 201911175241A CN 112866125 B CN112866125 B CN 112866125B
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ack feedback
packet
feedback packet
ack
base station
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CN112866125A (en
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王林
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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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
    • H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
    • H04L47/2466—Traffic characterised by specific attributes, e.g. priority or QoS using signalling traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04L47/29—Flow control; Congestion control using a combination of thresholds

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a downlink data transmission method and a device, aiming at the problem that in the prior art, as a base station does not distinguish the type of a downlink data packet, the transmission delay of an ACK feedback packet is larger, the method comprises the following steps: the base station acquires each ACK feedback packet sent by the service server on a PDCP layer, sets a corresponding ACK type mark for each ACK feedback packet, adds the ACK feedback packet into a corresponding target ACK feedback packet processing queue on the basis of first priority information and the ACK type mark of the ACK feedback packet on an MAC layer, and sequentially sends each ACK feedback packet to corresponding UE on the basis of the target ACK feedback packet processing queue. In the method and the device, the corresponding ACK type mark is set for the ACK feedback packet, and the ACK feedback packet is added into the corresponding target ACK feedback packet processing queue, so that the feedback time delay of the ACK feedback packet is reduced, and the overall throughput of the system is greatly improved.

Description

Downlink data transmission method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a downlink data transmission method and apparatus.
Background
The 5G New air interface (5G New radio,5G NR) is a global 5G standard based on a brand-New air interface design of Orthogonal Frequency Division Multiplexing (OFDM), and is also a very important cellular mobile technology basis for the next generation.
In a 5G NR network, when a Transmission Control Protocol (TCP) is used for data Transmission, after a user equipment establishes a connection with a service server, if the service server receives a data packet sent by a terminal, an Acknowledgement (ACK) feedback packet is sent to the user equipment, where the ACK feedback packet is used to confirm whether the data packet is received by the user equipment.
When a Packet Data Convergence Protocol (PDCP) layer of the base station receives an ACK feedback Packet from the service server, the ACK feedback Packet is passed through a Radio Link Control (RLC) layer and is handed to a Medium Access Control (MAC) layer for scheduling.
After receiving the ACK feedback packet from the PDCP/RLC layer, the MAC layer inserts the ACK feedback packet into a corresponding queue for preprocessing. Currently, a downlink queue of an MAC layer may be divided into a Signaling Radio Bearers (SRB) queue and a Data Radio Bearers (DRB) queue according to a service type, where the SRB queue has a higher priority than the DRB queue, and the DRB queue is divided into different processing priority queues according to a processing priority.
In the existing downlink scheduling algorithm of a base station, for downlink data packets of a plurality of User Equipments (UEs) with the same processing priority, the types of the downlink data packets are not distinguished, and the downlink data packets of the UEs are sequentially processed according to a polling manner. When a downlink data packet of one UE is processed, the service type of the downlink data packet is not distinguished, and the processing is performed only in a sequential manner.
In order to improve the throughput of the uplink service, a frame structure with 2.5ms double periods is adopted in the NR protocol, and as shown in fig. 1, one 5ms frame has 3 uplink timeslots, which are timeslot 4, timeslot 8 and timeslot 9, respectively, and there are 7 corresponding downlink timeslots, which are timeslot 0, timeslot 1, timeslot 2, timeslot 3, timeslot 5, timeslot 6 and timeslot 7, respectively.
In practical applications, since the user scheduling capability of a downlink time slot of a base station is smaller than the number of users in a current cell, resource conflict is likely to occur. However, for the downlink timeslot 7, if the current downlink data packet cannot be delivered due to reasons such as data resource collision and poor air interface quality, the current downlink data packet needs to wait until the next timeslot 10 of 5ms to be delivered continuously, with an intermediate interval of more than 1 ms.
File Transfer Protocol (FTP) service, which generally uses TCP Protocol for data transmission, is taken as an example. Suppose that the scheduling user capacity of one downlink time slot of the base station is 1 user, and the actual number of users is 2, where UE0 performs downlink FTP service and UE1 performs uplink FTP service. Then, for a certain downlink timeslot, when the PDCP layer of the base station receives a downlink FTP data packet from the core network UE0 and a downlink ACK feedback packet corresponding to the uplink FTP service of UE1 at the same time, the two data packets are sent to the MAC layer for scheduling through the RLC layer.
Because the scheduling user capacity of one downlink time slot of the current base station is 1 user, the current downlink time slot can only send a data packet to one of the UEs, that is, a selection needs to be made in the downlink FTP data packet of the UE0 and the downlink ACK feedback packet corresponding to the uplink FTP service of the UE 1.
If the processing priority of the downlink FTP data packet of the UE0 is the same as the processing priority of the downlink ACK feedback packet corresponding to the uplink FTP service of the UE1, and if the downlink FTP data packet of the UE0 is processed first in a polling manner, the downlink ACK feedback packet corresponding to the uplink FTP service of the UE1 is deferred to be issued in the next downlink time slot. For the downlink time slot 7, if such a problem occurs, the transmission can be delayed until the next time slot 10 of 5ms, and the delay reaches more than 1 ms.
Obviously, if the downlink data packets of a plurality of UEs with the same processing priority are processed according to a polling method without distinguishing the types of the downlink data packets, when a downlink ACK feedback packet corresponding to the uplink FTP service collides with a downlink service data packet, there is a certain probability of delaying scheduling, so as to increase the feedback delay.
Secondly, if the downlink data packet of a UE is processed in a sequential manner without distinguishing the type of the downlink data packet, when a downlink ACK feedback packet of an uplink FTP service of the UE collides with the downlink service data packet, there is a certain probability of scheduling delay, which increases the feedback delay, and especially when the downlink traffic volume is large and the quality of an air interface is poor, the increased feedback delay is more serious.
If the transmission delay of the ACK feedback packet is long, the normal transmission of the subsequent data at the transmitting side will be affected, and when the transmission delay exceeds the time interval specified by the retransmission timer at the transmitting side, the user equipment may consider that the service server fails to normally receive the transmitted data and needs to retransmit the transmitted data before, thereby greatly reducing the overall throughput of the system.
It follows that a new solution needs to be devised to overcome the above drawbacks.
Disclosure of Invention
The application provides a downlink data transmission method and device, which are used for solving the problem that in the prior art, due to the fact that a base station does not distinguish the type of a downlink data packet, transmission delay of an ACK feedback packet is large.
The embodiment of the application provides the following specific technical scheme:
a downlink data transmission method comprises the following steps:
a base station acquires each ACK feedback packet sent by a service server on a packet data convergence protocol PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet;
the base station sets corresponding ACK type marks for each ACK feedback packet on a PDCP layer, and sends each ACK feedback packet to a medium access control MAC layer;
the base station respectively adds each ACK feedback packet into a corresponding target ACK feedback packet processing queue on the basis of the first priority information and the ACK type mark of each ACK feedback packet in an MAC layer, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and the base station sequentially sends each ACK feedback packet to corresponding User Equipment (UE) on an MAC layer according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
Optionally, the obtaining, by the base station on the PDCP layer, an ACK feedback packet sent by the service server specifically includes:
the base station receives user plane tunneling protocol GTPU data sent by a service server on a PDCP layer;
the base station analyzes the GTPU data at a PDCP layer, extracts first priority information from a packet header of the GTPU data, and extracts an ACK feedback packet from a field of the GTPU data;
and the base station associates the first priority information with the ACK data packet at a PDCP layer.
Optionally, the extracting, by the base station, an ACK feedback packet from the field of the GTPU data specifically includes:
the base station removes the packet header of the GTPU data and extracts a Transmission Control Protocol (TCP) data packet, wherein the TCP data packet carries type information;
and the base station extracts an ACK feedback packet when determining that the TCP data packet is the ACK feedback packet according to the type information.
Optionally, before the base station sends each ACK feedback packet to the MAC layer on the PDCP layer, the method further includes:
the base station receives each service data packet sent by the service server at a PDCP layer, wherein one service data packet is associated with second priority information representing the processing priority of the service data packet;
the base station sends each ACK feedback packet to the MAC layer on the PDCP layer, which specifically includes:
when the base station determines that the total quantity of each ACK feedback packet and each service data packet reaches a set threshold value, the base station sorts each ACK feedback packet and each service data packet according to the criterion that the ACK feedback packet is in front of the service data packet and the service data packet is behind the service data packet, and sets corresponding sorting sequence numbers, wherein the ACK feedback packets are sorted according to a receiving sequence, and the service data packets are sorted according to the receiving sequence;
and the base station sends each ACK feedback packet and each service data packet to an MAC layer on the PDCP layer according to the sequencing sequence number.
Optionally, the base station adds, at the MAC layer, each ACK feedback packet to a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type flag of each ACK feedback packet, and specifically includes:
the base station receives each ACK feedback packet and each service data packet from the PDCP layer at the MAC layer, wherein the base station identifies each received ACK feedback packet according to the ACK type mark;
and the base station sequentially and respectively adds the ACK feedback packets into corresponding target ACK feedback packet processing queues according to the sequencing sequence number and based on the first priority information and the ACK type mark of each ACK feedback packet on the MAC layer.
A base station, comprising:
a memory for storing executable instructions;
a processor for reading and executing the executable instructions stored in the memory, performing the following processes:
acquiring each ACK feedback packet sent by a service server on a packet data convergence protocol PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet;
in a PDCP layer, setting corresponding ACK type marks aiming at each ACK feedback packet respectively, and sending each ACK feedback packet to a medium access control MAC layer;
on the MAC layer, based on the first priority information and the ACK type mark of each ACK feedback packet, each ACK feedback packet is respectively added into a corresponding target ACK feedback packet processing queue, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and at the MAC layer, sequentially sending each ACK feedback packet to corresponding User Equipment (UE) according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
Optionally, when acquiring an ACK feedback packet sent by the service server in the PDCP layer, the processor is configured to:
receiving user plane tunnel protocol GTPU data sent by a service server on a PDCP layer;
in a PDCP layer, analyzing the GTPU data, extracting first priority information from a packet header of the GTPU data, and extracting an ACK feedback packet from a field of the GTPU data;
associating, at the PDCP layer, the first priority information with the one ACK packet.
Optionally, when an ACK feedback packet is extracted from the field of the GTPU data, the processor is configured to:
removing the packet header of the GTPU data, and extracting a Transmission Control Protocol (TCP) data packet, wherein the TCP data packet carries type information;
and extracting an ACK feedback packet when the TCP data packet is determined to be the ACK feedback packet according to the type information.
Optionally, before the PDCP layer sends each ACK feedback packet to the MAC layer, the processor is configured to:
receiving, at a PDCP layer, each service data packet sent by the service server, where one service data packet is associated with second priority information representing a processing priority of the service data packet;
when the PDCP layer sends each ACK feedback packet to the MAC layer, the processor is configured to:
when the total quantity of the ACK feedback packets and the service data packets reaches a set threshold value, the ACK feedback packets and the service data packets are sequenced according to the criterion that the ACK feedback packets are in front of the service data packets, and the service data packets are in back of the service data packets, and corresponding sequencing serial numbers are set, wherein the ACK feedback packets are sequenced according to a receiving sequence, and the service data packets are sequenced according to the receiving sequence;
and at the PDCP layer, sending each ACK feedback packet and each service data packet to the MAC layer according to the sequencing sequence number.
Optionally, at the MAC layer, based on the first priority information and the ACK type flag of each ACK feedback packet, each ACK feedback packet is added to a corresponding target ACK feedback packet processing queue, where the processor is configured to:
receiving each ACK feedback packet and each service data packet from the PDCP layer at the MAC layer, wherein the base station identifies each received ACK feedback packet according to the ACK type mark;
and at the MAC layer, sequentially and respectively adding each ACK feedback packet into a corresponding target ACK feedback packet processing queue according to the sequencing sequence number and based on the first priority information and the ACK type mark of each ACK feedback packet.
A downlink data transmission apparatus, comprising:
an obtaining unit, configured to obtain each ACK feedback packet sent by a service server, where one ACK feedback packet is associated with first priority information representing a processing priority of the ACK feedback packet;
a marking unit, configured to set a corresponding ACK type mark for each ACK feedback packet, and send each ACK feedback packet to a medium access control MAC layer;
the identification unit is used for respectively adding each ACK feedback packet into a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type mark of each ACK feedback packet, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and the sending unit is used for sequentially sending each ACK feedback packet to the corresponding user equipment UE according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
A storage medium having instructions which, when executed by a processor, enable the processor to perform a method of downlink data transmission as claimed in any one of the preceding claims.
In the implementation of the method, the base station sets the corresponding ACK type mark for each ACK feedback packet after acquiring each ACK feedback packet on the PDCP layer, so that the ACK feedback packet is distinguished from the service data packet, the processing efficiency of identifying the ACK feedback packet is improved, then, on the MAC layer, each ACK feedback packet is added into a corresponding target ACK feedback packet processing queue, and the ACK feedback packet is sent to the UE according to the target ACK feedback packet processing queue.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a 2.5ms double-period frame structure employed in the NR protocol;
FIG. 2 is a schematic diagram of data flow in an embodiment of the present application;
fig. 3 is a schematic flowchart of a downlink data transmission method provided in an embodiment of the present application;
FIG. 4 is a diagram illustrating the structure of GTPU data in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a base station provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a downlink data transmission apparatus provided in an embodiment of the present application.
Detailed Description
Aiming at the problem that in the prior art, the transmission delay of an ACK feedback packet is large because a base station does not distinguish the type of a downlink data packet, in order to reduce the transmission delay of the ACK feedback packet and improve the system throughput, in the embodiment of the application, a solution for downlink data transmission is provided.
The scheme is as follows: the base station acquires each ACK feedback packet sent by a service server on a PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet, corresponding ACK type marks are respectively set for the ACK feedback packets, and the ACK feedback packets are sent to an MAC layer; then, on the MAC layer, each ACK feedback packet is added to a corresponding target ACK feedback packet processing queue, respectively, based on the first priority information and the ACK type flag of each ACK feedback packet, where one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type flag, and then, each ACK feedback packet is sequentially sent to the corresponding user equipment UE according to the ordering of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
In the embodiment of the present application, a User Equipment (UE) includes, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile phone), a handset (handset), a portable device (portable device), and the like, and the User Equipment may communicate with one or more core networks through a Radio Access Network (RAN), for example, the User Equipment may be a Mobile phone (or "cellular" phone), a computer with a wireless communication function, and the User Equipment may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted Mobile device.
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that, in the embodiment of the present application, the ACK feedback packet refers to ACK/NACK, and for convenience of description, an FTP service will be taken as an example for explanation.
Referring to fig. 2, in the embodiment of the present application, after a user equipment accesses a base station, the user equipment sends an uplink FTP service packet to a service server, so as to trigger an uplink FTP service, and in a transmission process of the uplink FTP service packet, the user equipment sends the uplink FTP service packet to the base station through an air interface, and transmits the uplink FTP service packet to a PDCP Layer through a Physical Layer (PHY Layer), an MAC Layer, and an RLC Layer.
After the User equipment sends the uplink FTP service data packet to a PDCP layer of a base station through an air interface, the PDCP layer adds a User plane tunneling Protocol (GTPU) head to the uplink FTP service data packet and then sends the uplink FTP service data packet to a core network, then, after the core network receives the uplink FTP service data packet added with the GTPU head, the GTPU head is removed, the uplink FTP service data packet is forwarded to a service server, and then, after the service server receives the uplink FTP service data packet, the service server can reply an ACK feedback packet to the User equipment. Similarly, the FTP service server sends the ACK feedback packet to the core network, after the core network adds the GTPU header to the ACK feedback packet, the core network sends GTPU data to the PDCP layer of the base station, and then the PDCP layer parses the GTPU data, and sends the parsed ACK feedback packet to the MAC layer, and then the MAC layer processes the ACK feedback packet.
Referring to fig. 3, in the embodiment of the present application, a downlink data transmission process is as follows.
Step S301: the base station acquires each ACK feedback packet sent by the service server in a PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet.
For convenience of description, only one ACK feedback packet transmitted by the traffic server will be described below.
In this embodiment, when step S301 is executed, the base station may perform the following operations:
a1, the base station receives GTPU data sent by the service server at a PDCP layer.
And the PDCP layer of the base station receives GTPU data sent by the service server, wherein the GTPU data is sent to the base station by the service server through the core network.
For example, referring to fig. 4, a structure that a PDCP layer of a base station receives GTPU data 1 and GTPU data 1, a GTPU data packet 1 mainly consists of a GTPU encapsulation part and an ACK feedback packet 1, where a GTPU header of the GTPU encapsulation part contains first priority information 1 of the ACK feedback packet 1, and the first priority information 1 represents that a processing priority of the ACK feedback packet 1 is 1.
For another example, referring to fig. 4, the PDCP layer of the base station receives GTPU data 2, and the GTPU data 2 mainly includes a GTPU encapsulation part and an ACK feedback packet 2, where a GTPU header of the GTPU encapsulation part includes first priority information 2 of the ACK feedback packet 2, and the first priority information 2 represents that the processing priority of the ACK feedback packet 1 is 1.
For another example, referring to fig. 4, the structure that the PDCP layer of the base station receives GTPU data 3 and GTPU data 3, where the GTPU data 3 mainly includes a GTPU encapsulation part and an ACK feedback packet 3, a GTPU header of the GTPU encapsulation part includes first priority information 3 of the ACK feedback packet 3, and the first priority information 3 represents that the processing priority of the ACK feedback packet 3 is 2.
For another example, as shown in fig. 4, the PDCP layer of the base station receives GTPU data 4, and the GTPU data 4 mainly includes a GTPU encapsulation part and a service data packet 1, where a GTPU header of the GTPU encapsulation part includes second priority information 1 of the service data packet 1, and the second priority information 1 represents that the processing priority of the service data packet 1 is 1.
For another example, as shown in fig. 4, the PDCP layer of the base station receives GTPU data 5, and the GTPU data 5 mainly includes a GTPU encapsulation part and a service data packet 2, where a GTPU header of the GTPU encapsulation part includes second priority information 2 of the service data packet 2, and the second priority information 2 indicates that the processing priority of the service data packet 2 is 1.
For another example, as shown in fig. 4, the PDCP layer of the base station receives GTPU data 6, and the GTPU data 6 mainly includes a GTPU encapsulation part and a service data packet 3, where a GTPU header of the GTPU encapsulation part includes second priority information 3 of the service data packet 3, and the second priority information 3 indicates that the processing priority of the service data packet 3 is 2.
A2, the base station analyzes the GTPU data at a PDCP layer, extracts first priority information from a packet header of the GTPU data, and extracts an ACK feedback packet from a field of the GTPU data.
Specifically, when the base station analyzes the GTPU data in the PDCP layer, the base station may perform the following operations:
and B1, removing the packet header of the GTPU data by the base station, and extracting a TCP data packet, wherein the TCP data packet carries type information.
For example, referring to fig. 4, the base station removes a GTPU encapsulation part of GTPU data 1 at the PDCP layer, and extracts a TCP data packet 1, where the TCP data packet 1 carries type information, the type information may be obtained according to an ACK flag in the TCP data packet 1, and when the ACK flag is 1 (tune), the type information represents that the TCP data packet 1 is an ACK feedback packet.
And B2, when the base station determines that the TCP data packet is an ACK feedback packet according to the type information, extracting an ACK feedback packet.
For example, in the PDCP layer, when the ACK flag in the TCP packet 1 is 1 (tune), the TCP packet 1 is determined to be an ACK feedback packet, and the ACK feedback packet 1 is extracted.
And B3, extracting the first priority information from the packet header of the GTPU data.
For example, the base station extracts, in the PDCP layer, first priority information 1 from a GTPU header of GTPU data 1, where the first priority information 1 indicates that the processing priority of the ACK feedback packet 1 is 1.
And A3, the base station associates the first priority information with the ACK data packet at a PDCP layer.
For example, the base station extracts, at the PDCP layer, the first priority information 1 and the ACK feedback packet 1 from the GTPU data 1, and then associates the first priority information 1 with the ACK feedback packet 1.
In the embodiment of the application, the processing priorities of different ACK feedback packets may be different, and after receiving GTPU data sent by a service server, a PDCP layer of a base station may obtain an ACK feedback packet through the above steps, where the ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet.
For example, after analyzing GTPU data 1, ACK feedback packet 1 may be associated with first priority information, where first priority information 1 represents that the processing priority of ACK feedback packet 1 is 1, ACK feedback packet 2 may be associated with first priority information 2, where first priority information 2 represents that the processing priority of ACK feedback packet 2 is 1, ACK feedback packet 3 may be associated with first priority information 3, and first priority information 3 represents that the processing priority of ACK feedback packet 3 is 2.
It should be noted that, in this embodiment of the application, when the base station analyzes GTPU data at the PDCP layer, if an ACK feedback packet cannot be extracted from GTPU data, the base station extracts second priority information from a GTPU header of the GTPU data, removes the GTPU data header, and extracts service data information from the GTPU data.
For example, referring to fig. 4, when the base station analyzes GTPU data 4 in the PDCP layer, if the ACK feedback packet cannot be extracted from the GTPU data 4, the base station extracts second priority information 1 from the GTPU header of the GTPU data 4, removes the packet header of the GTPU data 4, and extracts service data information 1 from the GTPU data 4.
Further, the base station associates the second priority information with the service data packet at the PDCP layer.
For example, the PDCP layer extracts the first priority information 1 and the ACK feedback packet 1 from the GTPU data 4, and associates the second priority information 1 with the service data packet 1.
Similarly, in the embodiment of the present application, the processing priorities of different service data packets may be different.
For example, the service data packet 1 may be associated with the second priority information 1, the second priority information 1 indicates that the processing priority of the service data packet 1 is 1, the service data packet 2 may be associated with the second priority information 2, the second priority information 2 indicates that the processing priority of the service data packet 2 is 1, the service data packet 3 may be associated with the second priority information 3, and the second priority information 3 indicates that the processing priority of the service data packet 3 is 2.
Step S302: and the base station sets corresponding ACK type marks for each ACK feedback packet on a PDCP layer respectively and sends each ACK feedback packet to an MAC layer.
For example, an ACK flag is set for ACK feedback packet 1, a NACK flag is set for ACK feedback packet 1, an ACK flag is set for ACK feedback packet 2, and an ACK flag is set for ACK feedback packet 3.
Specifically, when the base station determines that the total number of each ACK feedback packet and each service data packet reaches a set threshold value on a PDCP layer, the base station sorts each ACK feedback packet and each service data packet according to the criterion that the ACK feedback packet is in front of the service data packet and the service data packet is behind the service data packet, and sets a corresponding sorting sequence number, wherein the ACK feedback packets are sorted according to a receiving sequence, and the service data packets are sorted according to the receiving sequence;
and sending each ACK feedback packet and each service data packet to an MAC layer according to the sequencing sequence number.
For example, assuming that the predetermined threshold is 6, the receiving order of the pdcp layer is: when determining that the total quantity of each ACK feedback packet and each service data packet reaches 6, sequencing the service data packet 1, the service data packet 2, the service data packet 3, the ACK feedback packet 1, the ACK feedback packet 2 and the ACK feedback packet 3 according to the criterion that the ACK feedback packet is in front and the service data packet is in back, wherein the ACK feedback packet 1, the ACK feedback packet 2 and the ACK feedback packet 3 are sequenced according to a receiving sequence, the service data packet 1, the service data packet 2 and the service data packet 3 are sequenced according to the receiving sequence, and the sequence is as follows: an ACK feedback packet 1, an ACK feedback packet 2, an ACK feedback packet 3, a service data packet 1, a service data packet 2, and a service data packet 3, and setting corresponding sequencing sequence numbers: 0. 1, 2, 3, 4 and 5, and then according to the sequence number, sending the ACK feedback packet 1, the ACK feedback packet 2, the ACK feedback packet 3, the service data packet 1, the service data packet 2 and the service data packet 3 to the MAC layer.
Step S303: and the base station adds each ACK feedback packet into a corresponding target ACK feedback packet processing queue respectively on the basis of the first priority information and the ACK type mark of each ACK feedback packet at the MAC layer, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark.
In the embodiment of the application, the base station can set different processing queues for different processing priorities in an MAC layer.
For example, a target ACK feedback packet processing queue 1 and a target service data packet processing queue 1 may be set for the processing priority 1, where the target ACK feedback packet processing queue 1 is set corresponding to the ACK type flag, and a target ACK feedback packet processing queue 2 and a target service data packet processing queue 2 may be set for the processing priority 2, where the target ACK feedback packet processing queue 2 is set corresponding to the ACK type flag.
Specifically, the base station receives, at the MAC layer, each ACK feedback packet and each service data packet from the PDCP layer, wherein the base station identifies each received ACK feedback packet according to the ACK type flag.
For example, the MAC layer receives a service data packet 1, a service data packet 2, an ACK feedback packet 3, an ACK feedback packet 1, and a service data packet 3, and then recognizes that the ACK feedback packet 1, the ACK feedback packet 2, and the ACK feedback packet 3 are ACK feedback packets in the received data according to the ACK type flag.
Specifically, the base station sequentially and respectively adds each ACK feedback packet to a corresponding target ACK feedback packet processing queue in the MAC layer according to the sorting sequence number and based on the first priority information and the ACK type flag of each ACK feedback packet.
For example, the MAC layer receives the service data packet 1, the service data packet 2, the ACK feedback packet 3, the ACK feedback packet 1, and the service data packet 3, and the sequence numbers are 3, 4, 1, 2, 0, and 5, respectively, first, for the ACK feedback packet 1, based on the first priority information 1 and the ACK flag of the ACK feedback packet 1, the ACK feedback packet 1 is added to the target ACK feedback packet processing queue 1 corresponding to the processing priority 1, then, for the ACK feedback packet 2, based on the first priority information 1 and the NACK flag of the ACK feedback packet 2, the ACK feedback packet 2 is added to the target ACK feedback packet processing queue 1 corresponding to the processing priority 1, and then, for the ACK feedback packet 3, based on the first priority information 3 and the ACK flag of the ACK feedback packet 3, the ACK feedback packet 3 is added to the target ACK feedback packet processing queue 2 corresponding to the processing priority 2.
Similarly, the base station sequentially and respectively adds each service data packet into the corresponding target service data packet processing queue according to the sequencing sequence number and based on the second priority information of each service data packet in the MAC layer.
For example, first, for the service data packet 1, the service data packet 1 is added to the target service data packet processing queue 1 corresponding to the processing priority 1 based on the second priority information 1 of the service data packet 1, then, for the service data packet 2, the service data packet 2 is added to the target service data packet processing queue 1 corresponding to the processing priority 1 based on the second priority information 2 of the service data packet 2, and then, for the service data packet 3, the service data packet 3 is added to the target service data packet processing queue 2 corresponding to the processing priority 2 based on the second priority information 3 of the service data packet 3.
Step S304: and the base station sequentially sends each ACK feedback packet to corresponding User Equipment (UE) on an MAC layer according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
For example, the processing priority 1 of the target ACK feedback packet processing queue 1 is higher than the processing priority 2 of the target ACK feedback packet processing queue 2, and the base station, at the MAC layer, performs the following processing according to the sequence in the target ACK feedback packet processing queue 1: and the ACK feedback packets 1 and 2 firstly send the ACK feedback packets 1 to the corresponding UE1, then send the ACK feedback packets 2 to the corresponding UE2, and then send the ACK feedback packets 3 to the corresponding UE3 according to the sequence in the target ACK feedback packet processing queue 2.
Further, the base station sequentially sends each service data packet to the corresponding user equipment UE in the MAC layer according to the sequence of each service data packet recorded in each target service data packet processing queue.
For example, the processing priority 1 of the target service data packet processing queue 1 is higher than the processing priority 2 of the target service data packet processing queue 2, and the base station, at the MAC layer, performs the following operations according to the sequence in the target service data packet processing queue 1: the service data packets 1 and 2 are respectively sent to the corresponding UE4, the service data packets 2 are sent to the corresponding UE5, and then the service data packets 3 are sent to the corresponding UE6 according to the sequence in the target service data packet processing queue 2.
In the embodiment of the application, the target service data packet processing queue and the target ACK feedback packet processing queue with the same processing priority are sequentially processed according to the principle of processing the target ACK feedback packet processing queue first.
For example, in the MAC layer, the base station sequentially sends the ACK feedback packet 1 and the ACK feedback packet 2 in the target ACK feedback packet processing queue 1 to the corresponding UE1 and UE2, and then sends the service data packet 1 and the service data packet 2 in the target service data packet processing queue 1 to the corresponding UE4 and UE5.
For another example, the base station sends the ACK feedback packet 3 in the target ACK feedback packet processing queue 2 to the corresponding UE3 at the MAC layer, and then sends the service data packet 3 in the target service data packet processing queue 2 to the corresponding UE6.
Based on the same inventive concept, in the embodiments of the present application, a base station is provided, as shown in fig. 5, and at least includes:
a memory 501 for storing executable instructions;
the processor 502 is used for reading and executing the executable instructions stored in the memory, and executing the following processes:
in a PDCP layer, acquiring each ACK feedback packet sent by a service server, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet;
in the PDCP layer, setting corresponding ACK type marks for each ACK feedback packet respectively, and sending each ACK feedback packet to a Medium Access Control (MAC) layer;
on the MAC layer, based on the first priority information and the ACK type mark of each ACK feedback packet, each ACK feedback packet is respectively added into a corresponding target ACK feedback packet processing queue, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
in the MAC layer, according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue, each ACK feedback packet is sequentially sent to corresponding User Equipment (UE);
a transceiver 503 for receiving and transmitting data under the control of the processor 502.
Where, in fig. 5, the bus architecture may include any number of interconnected buses and bridges, one or more processors, represented in particular by processor 502, and various circuits, represented by memory 501, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 503 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 502 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 502 in performing operations.
The processor 502 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 502 in performing operations.
Optionally, in the PDCP layer, when acquiring an ACK feedback packet sent by the service server, the processor 502 is configured to:
receiving user plane tunnel protocol GTPU data sent by a service server on a PDCP layer;
in a PDCP layer, analyzing the GTPU data, extracting first priority information from a packet header of the GTPU data, and extracting an ACK feedback packet from a field of the GTPU data;
associating, at the PDCP layer, the first priority information with the one ACK packet.
Optionally, when an ACK feedback packet is extracted from the field of the GTPU data, the processor 502 is configured to:
removing the packet header of the GTPU data, and extracting a Transmission Control Protocol (TCP) data packet, wherein the TCP data packet carries type information;
and extracting an ACK feedback packet when the TCP data packet is determined to be the ACK feedback packet according to the type information.
Before the PDCP layer sends the ACK feedback packets to the MAC layer, the processor 502 is configured to:
receiving, at a PDCP layer, each service data packet sent by the service server, where one service data packet is associated with second priority information representing a processing priority of the service data packet;
when the PDCP layer sends each ACK feedback packet to the MAC layer, the processor 502 is configured to:
when the total quantity of the ACK feedback packets and the service data packets reaches a set threshold value, the ACK feedback packets and the service data packets are sequenced according to the criterion that the ACK feedback packets are in front of the service data packets, and the service data packets are in back of the service data packets, and corresponding sequencing serial numbers are set, wherein the ACK feedback packets are sequenced according to a receiving sequence, and the service data packets are sequenced according to the receiving sequence;
and at the PDCP layer, sending each ACK feedback packet and each service data packet to the MAC layer according to the sequencing sequence number.
Optionally, at the MAC layer, based on the first priority information and the ACK type flag of each ACK feedback packet, each ACK feedback packet is added to a corresponding target ACK feedback packet processing queue, where the processor 502 is configured to:
receiving each ACK feedback packet and each service data packet from the PDCP layer at the MAC layer, wherein the base station identifies each received ACK feedback packet according to the ACK type mark;
and at the MAC layer, sequentially and respectively adding each ACK feedback packet into a corresponding target ACK feedback packet processing queue according to the sequencing sequence number and based on the first priority information and the ACK type mark of each ACK feedback packet.
Based on the same inventive concept, in an embodiment of the present application, a downlink data transmission apparatus is provided, as shown in fig. 6, and at least includes: an acquisition unit 601, a marking unit 602, a recognition unit 603, and a transmission unit 604, wherein,
an obtaining unit 601, configured to obtain each ACK feedback packet sent by a service server, where one ACK feedback packet is associated with first priority information that represents a processing priority of the ACK feedback packet;
a marking unit 602, configured to set a corresponding ACK type mark for each ACK feedback packet, and send each ACK feedback packet to a MAC layer;
an identifying unit 603, configured to add each ACK feedback packet to a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type flag of each ACK feedback packet, respectively, where one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type flag;
a sending unit 604, configured to send each ACK feedback packet to the corresponding UE in sequence according to the ordering of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
The acquiring unit 601, the marking unit 602, the identifying unit 603 and the sending unit 604 cooperate with each other to implement the functions of the downlink data transmission apparatus in the above-described embodiments.
Based on the same inventive concept, the present application provides a storage medium, and when instructions in the storage medium are executed by a processor, the processor is enabled to execute any one of the methods implemented by the base station in the above-mentioned flow.
In the embodiment of the application, a base station acquires each ACK feedback packet sent by a service server on a PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet, then corresponding ACK type marks are respectively set for the ACK feedback packets, and the ACK feedback packets are sent to an MAC layer; and on the MAC layer, each ACK feedback packet is added into a corresponding target ACK feedback packet processing queue respectively based on the first priority information and the ACK type mark of each ACK feedback packet, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark, and then each ACK feedback packet is sequentially sent to corresponding User Equipment (UE) according to the sequence of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
Thus, the application has at least the following beneficial effects:
the base station sets corresponding ACK type marks for each ACK feedback packet after acquiring each ACK feedback packet on a PDCP layer, so that the ACK feedback packet is distinguished from a service data packet, the processing efficiency of identifying the ACK feedback packet is improved, then, each ACK feedback packet is added into a corresponding target ACK feedback packet processing queue on an MAC layer, and the ACK feedback packet is sent to the UE according to the target ACK feedback packet processing queue.
For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (12)

1. A downlink data transmission method is characterized by comprising the following steps:
a base station acquires each ACK feedback packet sent by a service server on a packet data convergence protocol PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet;
the base station sets corresponding ACK type marks for each ACK feedback packet on a PDCP layer, and sends each ACK feedback packet to a medium access control MAC layer;
the base station respectively adds each ACK feedback packet into a corresponding target ACK feedback packet processing queue on the basis of the first priority information and the ACK type mark of each ACK feedback packet in an MAC layer, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and the base station sequentially sends each ACK feedback packet to corresponding User Equipment (UE) on an MAC layer according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
2. The method as claimed in claim 1, wherein the base station acquires an ACK feedback packet sent by the service server at the PDCP layer, specifically comprising:
the base station receives user plane tunneling protocol GTPU data sent by a service server on a PDCP layer;
the base station analyzes the GTPU data at a PDCP layer, extracts first priority information from a packet header of the GTPU data, and extracts an ACK feedback packet from a field of the GTPU data;
and the base station associates the first priority information with the ACK feedback packet at a PDCP layer.
3. The method of claim 2, wherein said base station extracts an ACK feedback packet from a field of said GTPU data, comprising:
the base station removes the packet header of the GTPU data and extracts a Transmission Control Protocol (TCP) data packet, wherein the TCP data packet carries type information;
and the base station extracts an ACK feedback packet when determining that the TCP data packet is the ACK feedback packet according to the type information.
4. The method of any of claims 1 to 3, wherein the base station further comprises, before the PDCP layer sends the respective ACK feedback packets to the MAC layer:
the base station receives each service data packet sent by the service server on a PDCP layer, wherein one service data packet is associated with second priority information representing the processing priority of the service data packet;
the base station sends each ACK feedback packet to the MAC layer on the PDCP layer, which specifically includes:
when the base station determines that the total quantity of each ACK feedback packet and each service data packet reaches a set threshold value, the base station sorts each ACK feedback packet and each service data packet according to the criterion that the ACK feedback packet is in front of the service data packet and the service data packet is behind the service data packet, and sets corresponding sorting sequence numbers, wherein the ACK feedback packets are sorted according to a receiving sequence, and the service data packets are sorted according to the receiving sequence;
and the base station sends each ACK feedback packet and each service data packet to an MAC layer on the PDCP layer according to the sequencing sequence number.
5. The method as claimed in claim 4, wherein the base station adds each ACK feedback packet to a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type flag of each ACK feedback packet, respectively, at the MAC layer, which specifically includes:
the base station receives each ACK feedback packet and each service data packet from the PDCP layer at the MAC layer, wherein the base station identifies each received ACK feedback packet according to the ACK type mark;
and the base station sequentially and respectively adds the ACK feedback packets into corresponding target ACK feedback packet processing queues according to the sequencing sequence number and based on the first priority information and the ACK type mark of each ACK feedback packet on the MAC layer.
6. A base station, comprising:
a memory for storing executable instructions;
a processor for reading and executing the executable instructions stored in the memory, performing the following processes:
acquiring each ACK feedback packet sent by a service server at a packet data convergence protocol PDCP layer, wherein one ACK feedback packet is associated with first priority information representing the processing priority of the ACK feedback packet;
in a PDCP layer, setting corresponding ACK type marks aiming at each ACK feedback packet respectively, and sending each ACK feedback packet to a medium access control MAC layer;
on the MAC layer, based on the first priority information and the ACK type mark of each ACK feedback packet, each ACK feedback packet is respectively added into a corresponding target ACK feedback packet processing queue, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and at the MAC layer, sequentially sending each ACK feedback packet to corresponding User Equipment (UE) according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
7. The base station of claim 6, wherein in acquiring an ACK feedback packet sent by the service server at the PDCP layer, the processor is configured to:
receiving user plane tunnel protocol GTPU data sent by a service server on a PDCP layer;
in a PDCP layer, analyzing the GTPU data, extracting first priority information from a packet header of the GTPU data, and extracting an ACK feedback packet from a field of the GTPU data;
associating, at the PDCP layer, the first priority information with the one ACK feedback packet.
8. The base station of claim 7, wherein when an ACK feedback packet is extracted from a field of the GTPU data, the processor is configured to:
removing the packet header of the GTPU data, and extracting a Transmission Control Protocol (TCP) data packet, wherein the TCP data packet carries type information;
and extracting an ACK feedback packet when the TCP data packet is determined to be the ACK feedback packet according to the type information.
9. The base station of any of claims 6 to 8, wherein prior to the PDCP layer sending the respective ACK feedback packets to the MAC layer, the processor is configured to:
receiving, at the PDCP layer, each service data packet sent by the service server, where one service data packet is associated with second priority information representing a processing priority of the service data packet;
when the PDCP layer sends each ACK feedback packet to the MAC layer, the processor is configured to:
when the total quantity of the ACK feedback packets and the service data packets reaches a set threshold value, the ACK feedback packets and the service data packets are sequenced according to the criterion that the ACK feedback packets are in front of the service data packets, and the service data packets are in back of the service data packets, and corresponding sequencing serial numbers are set, wherein the ACK feedback packets are sequenced according to a receiving sequence, and the service data packets are sequenced according to the receiving sequence;
and sending each ACK feedback packet and each service data packet to an MAC layer at the PDCP layer according to the sequencing sequence number.
10. The base station of claim 9, wherein at the MAC layer, each ACK feedback packet is added to a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type flag of each ACK feedback packet, respectively, and the processor is configured to:
receiving each ACK feedback packet and each service data packet from the PDCP layer at the MAC layer, wherein the base station identifies each received ACK feedback packet according to the ACK type mark;
and at the MAC layer, sequentially and respectively adding each ACK feedback packet into a corresponding target ACK feedback packet processing queue according to the sequencing sequence number and based on the first priority information and the ACK type mark of each ACK feedback packet.
11. A downlink data transmission apparatus, comprising:
an obtaining unit, configured to obtain each ACK feedback packet sent by a service server, where one ACK feedback packet is associated with first priority information representing a processing priority of the ACK feedback packet;
the marking unit is used for respectively setting corresponding ACK type marks for each ACK feedback packet and sending each ACK feedback packet to a Medium Access Control (MAC) layer;
the identification unit is used for respectively adding each ACK feedback packet into a corresponding target ACK feedback packet processing queue based on the first priority information and the ACK type mark of each ACK feedback packet, wherein one target ACK feedback packet processing queue is preset corresponding to one processing priority and one ACK type mark;
and the sending unit is used for sequentially sending each ACK feedback packet to the corresponding user equipment UE according to the sequencing of each ACK feedback packet recorded in each target ACK feedback packet processing queue.
12. A storage medium, wherein instructions in the storage medium, when executed by a processor, enable the processor to perform the method of downlink data transmission according to any one of claims 1 to 5.
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