CN110072254B

CN110072254B - Data transmission method and related equipment thereof

Info

Publication number: CN110072254B
Application number: CN201810072502.3A
Authority: CN
Inventors: 马志斌; 季莉; 赵其勇
Original assignee: Shanghai Huawei Technologies Co Ltd
Current assignee: Shanghai Huawei Technologies Co Ltd
Priority date: 2018-01-24
Filing date: 2018-01-24
Publication date: 2021-01-05
Anticipated expiration: 2038-01-24
Also published as: WO2019144802A1; CN110072254A

Abstract

The embodiment of the application discloses a data transmission method and related equipment thereof, which are used for sensing the transmission state of a network and improving the utilization rate of network bandwidth. The method in the embodiment of the application comprises the following steps: the method comprises the steps that a server receives air interface bandwidth representation information sent by a base station, wherein the air interface bandwidth representation information is used for indicating the data transmission rate of an air interface of the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI); and then the server sends the target data according to the air interface bandwidth characterization information.

Description

Data transmission method and related equipment thereof

Technical Field

The present application relates to the field of communications, and in particular, to a data transmission method and related device.

Background

At present, Internet, including mobile Internet, transport layer data is mainly based on Transmission Control Protocol (TCP) to realize reliable Transmission, TCP is a connection-oriented, reliable, byte stream-based transport layer communication Protocol, and is defined by Request For Request (RFC) 793 of Internet Engineering Task Force (IETF), and TCP Protocol makes important contribution to development of Internet. However, with the development of internet user application services, especially future 5G mobile internet services, such as high definition video, Virtual Reality (VR) and other services, the data transmission is required to be high-speed, efficient, stable and low-delay.

In the transmission layer transmission control method in the prior art, based mainly on probing and packet loss detection, after a sending end finds that a packet loss exists, it is considered that a congestion condition may occur in a network, and a backoff measure for reducing a sending window is taken to reduce a data packet sending rate, specifically, a typical congestion control process mainly includes:

1) and (3) slow start process: after the connection is established, the sending end firstly sends a data packet in a detective manner, and gradually increases a sending window from small to large. Normally, when a segment is just started to be transmitted, a congestion window (cwnd) is first set to a value of 1 to 2 maximum segment (MSS). And increasing the congestion window by at most one MSS value after each acknowledgment for a new segment is received. In this way the congestion window cwnd of the sender is gradually increased.

2) Congestion avoidance: in order to prevent the congestion window CWND from increasing too much to cause network congestion, a slow start threshold ssthresh state variable is set, when CWND < ssthresh, a slow start algorithm is used, when CWND > ssthresh, the slow start algorithm is stopped and the congestion avoidance algorithm is changed to the congestion avoidance algorithm (when CWND is ssthresh, the slow start algorithm or the congestion control avoidance algorithm can be used), after entering the congestion avoidance phase, the congestion window CWND is slowly increased, and the congestion window CWND of the transmitting end is increased by 1 MSS instead of doubling CWND every round-trip time (RTT).

3) Fast retransmission and fast recovery: in the early transmission control, no matter in the slow start stage or the congestion avoidance stage, if the sender judges that the network is congested, the slow start threshold ssthresh is set to be half (not less than 2) of the value of the sending window when the congestion occurs, then the congestion window cwnd is reset to be 1, and the slow start algorithm is executed again. In order to improve the utilization rate of the available bandwidth of the network, a fast retransmission and fast recovery algorithm is provided. When the sending end continuously receives three repeated confirmations, relevant data packets which are possibly lost are quickly retransmitted without waiting for the data packet confirmation to be overtime; since the network may not be congested, the sender adopts a different strategy than slow start, but sets the cwnd value to a value obtained by halving the slow start threshold ssthresh, and then starts to execute a congestion avoidance algorithm ("additive increase"), so that the congestion window is slowly and linearly increased.

The sending end in the prior art has no accurate perception on the transmission state of the network, has slow start and blind packet loss backoff, has low bandwidth utilization rate of the network, is not suitable for data transmission in a wireless transmission link, and is not more suitable for the requirements of high-speed, high-efficiency, stable and low-delay transmission of future mobile internet services.

Disclosure of Invention

The embodiment of the application provides a data transmission method and related equipment thereof, which are used for sensing the transmission state of a network and improving the utilization rate of network bandwidth.

A first aspect of an embodiment of the present application provides a data transmission method, including: the method comprises the steps that a server receives air interface bandwidth representation information sent by a base station, wherein the air interface bandwidth representation information is used for indicating the data transmission rate of an air interface of the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI); and then the server sends the target data according to the air interface bandwidth characterization information. The server in this implementation manner can acquire the data transmission rate of the air interface of the base station according to the air interface bandwidth characterization information, sense the transmission state of the network, and quickly adjust the sending rate of the data according to the data transmission rate of the air interface of the base station, thereby improving the utilization rate of the network bandwidth.

In a possible design, in a first implementation manner of the first aspect of the embodiment of the present application, the sending, by the server, the target data according to the air interface bandwidth characterization information includes: and the server sends the target data according to the air interface bandwidth characterization information and a target buffer memory amount, wherein the target buffer memory amount is the data amount of the target data which needs to be cached by the base station. In this implementation manner, the server is refined to send the target data according to the target caching amount in addition to sending the target data according to the empty representation information, so that the embodiment of the present application has higher operability.

In a possible design, in a second implementation manner of the first aspect of this embodiment, before the server receives the representation information of the air interface bandwidth sent by the base station, the method further includes: the server receives an available cache message sent by the base station, wherein the available cache message comprises an available cache space and a concurrent data stream number, the available cache space is used for indicating the available cache space of a Radio Bearer (RB) where the target data is located, and the concurrent data stream number is used for indicating the number of services occupying the available cache space at the same time; and the server determines the target caching amount according to the available caching space, the number of the concurrent data streams and the initial bandwidth. In this implementation, a determination method of the target buffer amount is specifically described, so that the steps in the embodiment of the present application are more complete.

In a possible design, in a third implementation manner of the first aspect of the embodiment of the present application, before the server determines a target caching amount according to the available cache space, the number of concurrent data streams, and an initial bandwidth, the method further includes: the server sends an initial performance detection packet to the base station, wherein the initial performance detection packet is a continuous data packet; the server receives a first Acknowledgement (ACK) fed back by a terminal, wherein the first ACK is an ACK sent by the terminal when the terminal receives the initial performance detection packet through the base station; the server determines the initial bandwidth according to the reception interval of the first ACK. In this implementation manner, a determination manner of the initial bandwidth is specifically introduced, so that the steps of the embodiment of the present application are more complete.

In a possible design, in a fourth implementation manner of the first aspect of the embodiment of the present application, after the server determines a target caching amount according to the available cache space, the number of concurrent data streams, and an initial bandwidth, the method further includes: the server determines the initial data sending amount of the target data according to the initial bandwidth, the initial time delay and the target buffer storage amount, wherein the initial time delay is determined by the server according to the receiving interval of the first ACK; and the server sends the target data to the base station in an initial period, wherein the total sending quantity of the target data in the initial period is the sending quantity of the initial data. In this implementation manner, a determination method of the data size sent in the initial period is described, so that the embodiment of the present application is more feasible.

In a possible design, in a fifth implementation manner of the first aspect of the embodiment of the present application, the receiving, by the server, air interface bandwidth characterization information sent by the base station includes: and the server receives the representation information of the air interface bandwidth sent by the base station in a first period. In this implementation, it is described that the server may receive the empty representation information in the first period, so that the operability of the embodiment is improved.

In a possible design, in a sixth implementation manner of the first aspect of the embodiment of the present application, after the server sends the initial data transmission amount to the base station in an initial period, the method further includes: the server receives a service type sent by the base station, wherein the service type comprises a data stream type of target data; and the server adjusts the target caching amount according to the available caching space, the number of the concurrent data streams, the initial bandwidth and the service type. In the implementation mode, the server can also adjust the target cache amount according to the service type, so that the data amount cached by the base station is in a more reasonable level, and the bandwidth utilization rate is improved.

In one possible design, in a seventh implementation manner of the first aspect of the embodiment of the present application, the method further includes: the server receives a second ACK fed back by the terminal in the first period, wherein the second ACK is an ACK sent by the terminal when the terminal receives data sent by the server in the period before the first period; and the server determines a correction value according to the data transmission amount of the first period and the second ACK. In this implementation, the determination of the correction value is specifically described, so that the embodiment is more feasible.

In a possible design, in an eighth implementation manner of the first aspect of the embodiment of the present application, the sending, by the server, the target data according to the air interface bandwidth characterization information includes: and the server sends the target data according to the air interface bandwidth characterization information and the correction value in a second period, wherein the second period is a period subsequent to the first period, and the first period and the second period are adjacent periods. In the implementation mode, the server can also correct the transmission of the target data according to the correction value, so that the data transmission is more accurate.

A second aspect of the embodiments of the present application provides a data transmission method, including: the method comprises the steps that a base station sends air interface bandwidth representation information to a server, so that the server sends target data according to the air interface bandwidth representation information, the air interface bandwidth representation information indicates the data transmission rate of an air interface of the base station, the target caching amount is the data amount which needs to be cached by the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access control method comprises the steps that the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the RLC layer PDU by the MAC layer, the Channel Quality Indicator (CQI) reported to the base station by a terminal, or the Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), the Rank Indicator (RI) and a Precoding Matrix (PMI). In this implementation, the base station sends the empty port characterization information to the server, and then the server can obtain the data transmission rate of the empty port of the base station according to the empty port bandwidth characterization information, sense the transmission state of the network, and quickly adjust the data sending rate according to the data transmission rate of the empty port of the base station, thereby improving the network bandwidth utilization rate.

In a possible design, in a first implementation manner of the second aspect of this embodiment, before the base station sends the air interface bandwidth characterization information to the server, the method further includes: the base station sends an available cache message to the server, wherein the available cache message comprises an available cache space and a number of concurrent data streams, so that the server determines a target cache amount according to the available cache message and an initial bandwidth, the available cache space is the available cache space of a Radio Bearer (RB) where the target data is located, and the number of the concurrent data streams is the number of services occupying the available cache space at the same time. In this implementation, the base station may also send the available cache information to the server, so that the embodiment has more integrity.

In a possible design, in a second implementation manner of the second aspect of the embodiment of the present application, the method further includes: the base station identifies the service type of the target data according to the data stream characteristics of the target data sent by the terminal; and the base station sends the service type to the server so that the server adjusts the target caching amount according to the service type, the available caching space, the number of concurrent data streams and the initial bandwidth. In the implementation mode, the base station can also send the service type to the server, so that the server can more accurately judge the size of the target buffer storage amount.

A third aspect of an embodiment of the present application provides a server, including: a first receiving unit, configured to receive air interface bandwidth characterization information sent by a base station, where the air interface bandwidth characterization information is used to indicate a data transmission rate of an air interface of the base station, and the air interface bandwidth characterization information includes one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI); and the first sending unit is used for sending the target data according to the air interface bandwidth characterization information. The server in this implementation manner can acquire the data transmission rate of the air interface of the base station according to the air interface bandwidth characterization information, sense the transmission state of the network, and quickly adjust the sending rate of the data according to the data transmission rate of the air interface of the base station, thereby improving the utilization rate of the network bandwidth.

In a possible design, in a first implementation manner of the third aspect of the embodiment of the present application, the first sending unit is specifically configured to: and sending the target data according to the air interface bandwidth characterization information and a target buffer memory amount, wherein the target buffer memory amount is the data amount of the target data which needs to be cached by the base station. In this implementation manner, the server is refined to send the target data according to the target caching amount in addition to sending the target data according to the empty representation information, so that the embodiment of the present application has higher operability.

In a possible design, in a second implementation manner of the third aspect of the embodiment of the present application, the server further includes: a second receiving unit, configured to receive an available buffer message sent by the base station, where the available buffer message includes an available buffer space and a number of concurrent data streams, the available buffer space is used to indicate an available buffer space of a radio bearer RB where the target data is located, and the number of concurrent data streams is used to indicate a number of services occupying the available buffer space at the same time; and the first determining unit is used for determining a target buffer amount according to the available buffer space, the number of the concurrent data streams and the initial bandwidth. In this implementation, a determination method of the target buffer amount is specifically described, so that the steps in the embodiment of the present application are more complete.

In a possible design, in a third implementation manner of the third aspect of the embodiment of the present application, the server further includes: a second sending unit, configured to send an initial performance probe packet to the base station, where the initial performance probe packet is a continuous data packet; a third receiving unit, configured to receive a first acknowledgement ACK fed back by a terminal, where the first ACK is an ACK sent by the terminal when the terminal receives the initial performance probe packet through the base station; a second determining unit, configured to determine the initial bandwidth according to a reception interval of the first ACK. In this implementation manner, a determination manner of the initial bandwidth is specifically introduced, so that the steps of the embodiment of the present application are more complete.

In a possible design, in a fourth implementation manner of the third aspect of the embodiment of the present application, the server further includes: a third determining unit, configured to determine an initial data sending amount of the target data according to the initial bandwidth, an initial time delay, and the target buffer amount, where the initial time delay is determined by the server according to a receiving interval of the first ACK; a third transmitting unit, configured to transmit the initial data transmission amount to the base station in an initial period. In this implementation manner, a determination method of the data size sent in the initial period is described, so that the embodiment of the present application is more feasible.

In a possible design, in a fifth implementation manner of the third aspect of the embodiment of the present application, the first receiving unit is specifically configured to: and receiving the representation information of the air interface bandwidth sent by the base station in a first period. In this implementation, it is described that the server may receive the empty representation information in the first period, so that the operability of the embodiment is improved.

In a possible design, in a sixth implementation manner of the third aspect of the embodiment of the present application, the server further includes: a fourth receiving unit, configured to receive a service type sent by the base station, where the service type includes a data stream type of target data; a first adjusting unit, configured to adjust the target caching amount according to the available caching space, the number of concurrent data streams, the initial bandwidth, and the service type. In the implementation mode, the server can also adjust the target cache amount according to the service type, so that the data amount cached by the base station is in a more reasonable level, and the bandwidth utilization rate is improved.

In a possible design, in a seventh implementation manner of the third aspect of the embodiment of the present application, the server further includes: a fifth receiving unit, configured to receive, in the first period, a second ACK fed back by the terminal, where the second ACK is an ACK sent by the server in a period before the first period and received by the terminal; and the fourth determining unit is used for determining a correction value according to the data transmission amount of the first period and the second ACK. In this implementation, the determination of the correction value is specifically described, so that the embodiment is more feasible.

In a possible design, in an eighth implementation manner of the third aspect of the embodiment of the present application, the first sending unit is further specifically configured to: and sending the target data according to the air interface bandwidth characterization information and the correction value in a second period, wherein the second period is a period subsequent to the first period, and the first period and the second period are adjacent periods. In the implementation mode, the server can also correct the transmission of the target data according to the correction value, so that the data transmission is more accurate.

A fourth aspect of the embodiments of the present application provides a base station, where the base station includes: a first sending unit, configured to send air interface bandwidth characterization information to a server, so that the server sends target data according to the air interface bandwidth characterization information, where the air interface bandwidth characterization information indicates a data transmission rate of an air interface of a base station, and the target buffer amount is a data amount that the base station needs to buffer, where the air interface bandwidth characterization information includes one or more of the following: the base station media access control method comprises the steps that the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the RLC layer PDU by the MAC layer, the Channel Quality Indicator (CQI) reported to the base station by a terminal, or the Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), the Rank Indicator (RI) and a Precoding Matrix (PMI). In this implementation, the base station sends the empty port characterization information to the server, and then the server can obtain the data transmission rate of the empty port of the base station according to the empty port bandwidth characterization information, sense the transmission state of the network, and quickly adjust the data sending rate according to the data transmission rate of the empty port of the base station, thereby improving the network bandwidth utilization rate.

In one possible design, in a first implementation manner of the fourth aspect of the embodiment of the present application, the base station further includes: a second sending unit, configured to send an available cache message to the server, where the available cache message includes an available cache space and a number of concurrent data streams, so that the server determines a target caching amount according to the available cache message and an initial bandwidth, the available cache space is an available cache space of a radio bearer RB where the target data is located, and the number of concurrent data streams is a number of services simultaneously occupying the available cache space. In this implementation, the base station may also send the available cache information to the server, so that the embodiment has more integrity.

In a possible design, in a second implementation manner of the fourth aspect of the embodiment of the present application, the base station further includes: the identification unit is used for identifying the service type of the target data according to the data stream characteristics of the target data sent by the terminal; a third sending unit, configured to send the service type to the server, so that the server adjusts the target caching amount according to the service type, the available cache space, the number of concurrent data streams, and the initial bandwidth. In the implementation mode, the base station can also send the service type to the server, so that the server can more accurately judge the size of the target buffer storage amount.

Yet another aspect of the present application provides a computer-readable storage medium having stored therein instructions, which when executed on a computer, cause the computer to perform the method of the above-described aspects.

Yet another aspect of the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of the above-described aspects.

According to the technical scheme, the embodiment of the application has the following advantages: the method comprises the steps that a server receives air interface bandwidth representation information sent by a base station, wherein the air interface bandwidth representation information is used for indicating the data transmission rate of an air interface of the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI); and then the server sends the target data according to the air interface bandwidth characterization information. The server in this implementation manner can acquire the data transmission rate of the air interface of the base station according to the air interface bandwidth characterization information, sense the transmission state of the network, and quickly adjust the sending rate of the data according to the data transmission rate of the air interface of the base station, thereby improving the utilization rate of the network bandwidth.

Drawings

Fig. 1 is a schematic diagram of a system architecture to which a data transmission method according to an embodiment of the present application is applied;

fig. 2 is a schematic diagram of another system architecture to which a data transmission method according to an embodiment of the present application is applied;

fig. 3 is a schematic flowchart of a data transmission method according to an embodiment of the present application;

fig. 4 is another schematic flow chart of a data transmission method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a message option structure of a data transmission method according to an embodiment of the present application;

fig. 6a is a schematic diagram of another message option structure of a data transmission method according to an embodiment of the present application;

fig. 6b is a schematic diagram of another message option structure of a data transmission method according to an embodiment of the present application;

fig. 7 is a schematic diagram of another message option structure of a data transmission method according to an embodiment of the present application;

fig. 8 is a schematic diagram of another message option structure of a data transmission method according to an embodiment of the present application;

fig. 9 is a schematic diagram of another message option structure of a data transmission method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a server according to an embodiment of the present application;

fig. 11 is another schematic structural diagram of a server according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 13 is another schematic structural diagram of a server according to an embodiment of the present application;

fig. 14 is another schematic structural diagram of a base station according to an embodiment of the present application.

Detailed Description

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The data transmission method in the present application may be applied to a server and a base station, where the server and the base station in the present application may establish a communication connection, and the server in the present application may be a Radio Access Network (RAN) transmission proxy transmission control entity (proxy server) or a server transmission control entity.

The embodiment of the present application may be applied to a network architecture as shown in fig. 1, where a server sends data to a base station through a core network, and the base station sends the received data to a terminal, where as shown in fig. 2, the base station in the embodiment of the present application may receive and cache the data sent by the server.

Referring to fig. 3, an embodiment of a data transmission method in the embodiment of the present application includes:

301. the base station sends a communication request to the server.

In this embodiment, a base station initiates a communication negotiation before starting transmission of a data stream, and sends a communication request to a server, where the communication request includes a cross-layer communication capability indication and communication request information, the cross-layer communication capability indication is used to indicate that the base station has a cross-layer communication capability, and the communication request information is used to request establishment of a communication connection with the server.

302. The server transmits communication confirmation information to the base station.

In this embodiment, after receiving a communication request sent by a base station, a server generates communication confirmation information according to the communication request, sends the communication confirmation information to the base station, and establishes a communication connection, where the communication confirmation information includes a cross-layer communication capability indication and communication confirmation information, the cross-layer communication capability indication is used to indicate that the server has a cross-layer communication capability, and the communication confirmation information is used to confirm establishment of the communication connection with the base station.

It should be noted that the communication request may also be sent by the server side, and the base station side responds to the communication confirmation to establish the communication connection, and the specific sender and the responder are not limited herein.

303. And the base station sends the available buffer space and the number of the concurrent data streams to the server.

In this embodiment, after the base station and the server establish a communication connection, before starting data transmission, the base station may send an available buffer space and a number of concurrent data streams to the server, where the available buffer space is an available buffer space of a Radio Bearer (RB) where target data is located, and the number of concurrent data streams is a number of services that simultaneously occupy the available buffer space, for example, if a terminal simultaneously downloads a video and browses a web page, the number of concurrent data streams is 2; the server can determine the data amount occupied by the cache of the target data in the base station and determine the sending rate according to the cache space and the number of the concurrent data streams.

304. The server sends an initial performance probe packet to the base station.

In this embodiment, in order to determine the data transmission capability of the base station, the server may send an initial performance probe packet to the base station, where the initial performance probe packet includes a small amount of data.

305. The base station sends an initial performance detection packet to the terminal.

In this embodiment, after receiving an initial performance probe packet sent by a server, a base station sends the initial performance probe packet to a terminal, where the initial performance probe packet is a data packet that is continuously sent.

306. And the terminal generates the ACK according to the received initial performance detection packet.

In this embodiment, after receiving the initial performance probe packet, the terminal generates an ACK corresponding to the initial performance probe packet, where the ACK indicates that the terminal receives the initial performance probe packet.

307. The terminal sends an ACK to the server.

In this embodiment, after the terminal generates the ACK, the ACK is immediately sent to the server.

308. And the server determines the initial bandwidth and the initial time delay according to the ACK.

In this embodiment, after receiving the ACK, the server determines an initial bandwidth and an initial delay according to the time of the received ACK and the time interval of each ACK, where the initial bandwidth may reflect the data throughput of the base station.

309. And the server determines a target caching amount according to the available caching space, the number of concurrent data streams and the initial bandwidth.

In this embodiment, after the server receives the available cache space, the number of concurrent data streams, and the initial bandwidth to determine the target caching amount, the server determines the target caching amount according to the available cache space, the number of concurrent data streams, and the initial bandwidth, specifically, the server determines the available caching amount of the target data according to the available cache space and the number of concurrent data streams, where the available caching amount of the target data may be a quotient of the available cache space and the number of concurrent data streams, and then determines the target caching amount according to the available caching amount of the target data and the initial bandwidth.

310. And the server determines the initial data sending quantity of the target data according to the initial bandwidth, the initial time delay and the target buffer storage quantity.

In this embodiment, after the server determines the target buffer amount, the initial data sending amount of the target data is determined according to the initial bandwidth, the initial delay, and the target buffer amount.

The initial data transmission amount is specifically as follows: the product of the initial bandwidth and the initial delay plus the target buffer amount.

311. The server transmits an initial data transmission amount to the base station at an initial period.

In this embodiment, after the server determines the initial data transmission amount, the initial data transmission amount is transmitted to the base station in an initial period, where the initial period is an initial period for the server to transmit the target data.

The initial period may be 1 RTT, and after the initial period, the data transmission rate substantially reaches the available bandwidth of the air interface. After an initial period, a short duration (which may be 0.5 RTT) may be entered, such as a first period, a second period, and so on.

312. And the base station sends the air interface bandwidth representation information to the server in the first period.

In this embodiment, when the base station enters a data transmission control phase with a continuous short period, for example, enters a first period, the characterization information of the air interface bandwidth of the first period is sent to the server, where the characterization information of the air interface bandwidth may indicate a data transmission rate (air interface bandwidth) of an air interface of the base station.

The first period is one period after the initial period, and is not necessarily an adjacent period to the initial period.

It should be noted that the air interface bandwidth characterization information includes one or more of the following: a scheduling rate of a Radio Link Control (RLC) Protocol Data Unit (PDU) by a MAC layer of a base station, a scheduling data amount of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal, or a Channel State Indicator (CSI) reported to the base station by the terminal, where the CSI includes the CQI, a Rank Indicator (RI), and a Precoding Matrix (PMI).

It should be noted that, if the number of concurrent data streams changes at this time, the base station needs to send the number of concurrent data streams to the server at the same time.

313. And the server sends the target data according to the air interface bandwidth characterization information.

In this embodiment, after receiving the representation information of the air interface bandwidth sent by the base station, the server will quickly measure and calculate the network transmission rate of the data according to the representation information of the air interface bandwidth, and send the target data according to the measured network transmission rate.

It should be noted that, when the representation information of the air interface bandwidth is a CQI, the server may calculate the air interface bandwidth according to a preset CQI-air interface bandwidth model, and the CQI-air interface bandwidth model may implement online learning and correction.

It should be noted that the base station further identifies the service type of the target data according to the data stream characteristics of the target data sent by the server, and sends the service type to the server, so that the server updates the target buffer amount according to the available buffer space, the number of concurrent data streams, the initial bandwidth, and the service type, so that the buffer data amount transmitted by the air interface of the base station is kept at a necessary and reasonable level corresponding to the service type, and the utilization rate of the available bandwidth of the air interface is improved.

It should be noted that, in the embodiment of the present application, if it is detected that the data transmission of the server is completed, the data transmission control is ended.

In the embodiment of the application, a server establishes communication connection with a base station; in the data transmission process, the base station sends air interface bandwidth characterization information to the base station, wherein the air interface bandwidth characterization information indicates the data transmission rate of an air interface of the base station, and then the server sends target data according to the received air interface bandwidth characterization information. The server in the application can acquire the data transmission rate of the air interface of the base station according to the air interface bandwidth characterization information, sense the transmission state of the network, and quickly adjust the sending rate of the data according to the data transmission rate of the air interface of the base station, thereby improving the utilization rate of the network bandwidth.

Referring to fig. 4, an embodiment of a data transmission method in the embodiment of the present application includes:

401. the base station sends a communication request to the server.

402. The server transmits communication confirmation information to the base station.

403. And the base station sends the available buffer space and the number of the concurrent data streams to the server.

404. The server sends an initial performance probe packet to the base station.

405. The base station sends an initial performance detection packet to the terminal.

406. And the terminal generates the ACK according to the received initial performance detection packet.

407. The terminal sends an ACK to the server.

408. And the server determines the initial bandwidth and the initial time delay according to the ACK.

409. And the server determines a target caching amount according to the available caching space, the number of concurrent data streams and the initial bandwidth.

410. And the server determines the initial data sending quantity of the target data according to the initial bandwidth, the initial time delay and the target buffer storage quantity.

411. The server sends the initial data sending amount to the base station in an initial period, wherein the initial period is the initial period for the server to send the target data.

412. And the base station sends the air interface bandwidth representation information to the server in the first period.

In this embodiment, steps 401 to 412 are similar to steps 301 to 312 in the corresponding embodiment of fig. 3, and are not described herein again.

413. The terminal feeds back the ACK to the server in the first period.

In this embodiment, the terminal may feed back an ACK to the server in the first period, where the ACK is an ACK sent by the server in a period before the first period and received by the base station.

414. And the server determines a correction value according to the first period air interface bandwidth characterization information and the ACK.

In this embodiment, after the server receives the ACK, a correction value is determined according to the data transmission amount of the first cycle received before, where the determining the correction value includes: determining a data transmission rate of a first periodic base station air interface according to the first periodic air interface bandwidth characterization information, determining a first data transmission quantity according to the data transmission rate, determining an actual air interface transmission rate according to the first periodic ACK, determining a second transmission quantity according to the actual air interface transmission rate, and finally determining a first periodic correction value according to the difference value of the first transmission quantity and the second transmission quantity.

415. And the server sends the target data according to the air interface bandwidth characterization information and the correction value in the second period.

In this embodiment, the server corrects the data transmission amount (or the data transmission rate) in the second period according to the received air interface bandwidth characterization information and the correction value obtained in the first period, so as to achieve the purpose that the buffered data amount of the base station is substantially balanced, for example, if the calculated correction amount is 5 and the calculated data transmission amount according to the received air interface bandwidth characterization information is 100, the data amount 95 needs to be transmitted in the second period after the correction.

In the embodiment of the application, a server establishes communication connection with a base station; in the data transmission process, the base station sends air interface bandwidth characterization information to the base station, wherein the air interface bandwidth characterization information indicates the data transmission rate of an air interface of the base station, and then the server sends target data according to the received air interface bandwidth characterization information. The server in the application can acquire the data transmission rate of the air interface of the base station according to the air interface bandwidth characterization information, sense the transmission state of the network, quickly adjust the data sending rate according to the data transmission rate of the air interface of the base station, and improve the utilization rate of the network bandwidth.

Specifically, the information transmission between the base station and the server in the embodiment corresponding to fig. 3 and the embodiment corresponding to fig. 4 may be implemented by inserting a custom option in an option field of a TCP packet header, and for an uplink, the base station sends cross-layer coordination information to the server, and an option structure may be as shown in fig. 5 as follows:

1) the 1 st byte of the option indicates the option type, and the user-defined type number is 10, which is used for cross-layer cooperative information bearing in the scheme of the application;

2) the 2 nd byte of the option shows the length of the content of the option, 4 bytes;

3) and selecting bytes 3-5 to carry specific cross-layer cooperative interaction information.

The 3-5 bytes cross-layer collaboration information field of the option, which can be defined as shown in fig. 6a or 6 b;

as shown in fig. 7, since the representation range of the MAC layer scheduling rate field is large, information feedback can be performed through an independent option, for example, the custom type number 11;

for downlink, the server transmission control entity or the RAN transmission high-power transmission control entity sends cross-layer coordination information to the base station, and the option structure may be as shown in fig. 8:

unlike the uplink, the length of the downlink cross-layer cooperation field information is only 1 byte, which can be defined as shown in fig. 9;

specific fields may be defined as follows:

1) cross-layer communication capability indication, 2 bits, 00: no information is carried, and the field is invalid; 11: the method has the cross-layer communication capability specified by the scheme of the application; 01: the cross-city communication capability specified by the scheme of the application is not provided;

2) request or response, 2 bits, 00: no information is carried, and the field is invalid; 11: requesting to implement a communication connection or responding to a confirmation to make a pass connection; 01: requesting communication connection or refusing to perform communication connection;

3) traffic type, 4 bits, 0000: no information is carried, and the field is invalid; non-0000: the base station fills in service type numbers according to the identification result of the SC service identification module, such as 1111-VR virtual reality service, 1110-video service, 1101-webpage browsing service and the like;

4) CQI, 4 bits, 0000: no information is carried, and the field is invalid; 0001: corresponding to CQI rank 0; 0010 corresponding CQI grade 1; by analogy, 1111 corresponds to CQI level 15;

5) the scheduling rate of the MAC layer to the RLC layer PDU is 16 bits, the field unit is 100kbps, for example, 0000000011110000, and the scheduling rate of the MAC layer to the RLC layer PDU is 24 Mbps;

6) available buffer space of RB radio bearer, 8 bits, 00000000: no information is carried, and the field is invalid; non-00000000: the available buffer space of a specific RB radio bearer is advertised with a unit of 100KByte, e.g., 00001111, 1500KByte, 11111111, and 25500 KByte.

If the total length of the option field exceeds 40 bytes, sequence information of a last section of received discontinuous data packets of a Selective ACK (SACK) SACK can be deleted, so that the byte space occupied by the SACK option is reduced, which does not affect transmission performance in the scheme of the present application.

With reference to fig. 10, the above describes a data transmission method in the embodiment of the present application, and a server in the embodiment of the present application is described below, where an embodiment of the server in the embodiment of the present application includes:

a first receiving unit 1001, configured to receive air interface bandwidth characterization information sent by a base station, where the air interface bandwidth characterization information is used to indicate a data transmission rate of an air interface of the base station, and the air interface bandwidth characterization information includes one or more of the following: the method comprises the steps that a base station media access controls the scheduling rate of an MAC layer to a Radio Link Control (RLC) layer Protocol Data Unit (PDU), the scheduling data volume of the MAC layer to the RLC layer PDU, the Channel Quality Identifier (CQI) reported to the base station by a terminal or the Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Identifier (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI);

a first sending unit 1002, configured to send the target data according to the air interface bandwidth characterization information.

In the embodiment of the application, the server sends the target data according to the empty port characterization information sent by the base station, and the server in the application can sense the transmission state of the network, so that the utilization rate of the network bandwidth is improved.

For convenience of understanding, the following describes the server in the embodiment of the present application in detail, and with reference to fig. 11 on the basis of the above fig. 10, fig. 11 is a schematic diagram of another embodiment of the server in the embodiment of the present application, where the server includes: a first receiving unit 1101 and a first transmitting unit 1102.

Optionally, the first receiving unit 1101 is specifically configured to:

and receiving the representation information of the air interface bandwidth sent by the base station in the first period.

Optionally, the first sending unit 1102 is specifically configured to:

And the combination of (a) and (b),

and sending the target data in a second period according to the air interface bandwidth characterization information and the correction value, wherein the second period is a period subsequent to the first period, and the first period and the second period are adjacent periods.

Optionally, the server further includes:

a second receiving unit 1103, configured to receive an available buffer message sent by a base station, where the available buffer message includes an available buffer space and a number of concurrent data streams, the available buffer space is used to indicate an available buffer space of a radio bearer RB where target data is located, and the number of concurrent data streams is used to indicate a number of services occupying the available buffer space at the same time;

a first determining unit 1104, configured to determine a target buffer amount according to the available buffer space, the number of concurrent data streams, and the initial bandwidth.

A second sending unit 1105, configured to send an initial performance probe packet to the base station, where the initial performance probe packet is a continuous data packet;

a third receiving unit 1106, configured to receive a first acknowledgement ACK fed back by the terminal, where the first ACK is an ACK sent by the terminal when the terminal receives the initial performance detection packet through the base station;

a second determining unit 1107 is configured to determine the initial bandwidth according to the reception interval of the first ACK.

A third determining unit 1108, configured to determine an initial data sending amount of the target data according to the initial bandwidth, the initial time delay, and the target buffer amount, where the initial time delay is determined by the server according to the receiving interval of the first ACK;

third transmitting section 1109 is configured to transmit the initial data transmission amount to the base station in the initial period.

A fourth receiving unit 1110, configured to receive a service type sent by a base station, where the service type includes a data stream type of target data;

the first adjusting unit 1111 is configured to adjust the target buffer amount according to the available buffer space, the number of concurrent data streams, the initial bandwidth, and the traffic type.

A fifth receiving unit 1112, configured to receive, in the first cycle, a second ACK fed back by the terminal, where the second ACK is an ACK sent when the terminal receives data sent by the server in a cycle before the first cycle;

a fourth determining unit 1113 configured to determine the correction value according to the data transmission amount of the first cycle and the second ACK.

Referring to fig. 12, fig. 12 is a schematic diagram of an embodiment of a base station in the embodiment of the present application:

a first sending unit 1201, configured to send air interface bandwidth characterization information to a server, so that the server sends target data according to the air interface bandwidth characterization information, where the air interface bandwidth characterization information indicates a data transmission rate of an air interface of a base station, a target buffer amount is a data amount that needs to be buffered by the base station, and the air interface bandwidth characterization information includes one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the RLC layer PDU by the MAC layer, the Channel Quality Indicator (CQI) reported to the base station by a terminal or the Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), the Rank Indicator (RI) and the Precoding Matrix (PMI).

A second sending unit 1202, configured to send an available cache message to the server, where the available cache message includes an available cache space and a number of concurrent data streams, so that the server determines a target cache amount according to the available cache message and an initial bandwidth, where the available cache space is an available cache space of a radio bearer RB where the target data is located, and the number of concurrent data streams is a number of services simultaneously occupying the available cache space.

An identifying unit 1203, configured to identify a service type of target data according to a data stream feature of the target data sent by a terminal;

a third sending unit 1204, configured to send the service type to the server, so that the server adjusts the target caching amount according to the service type, the available caching space, the number of concurrent data streams, and the initial bandwidth.

Fig. 10 to 12 respectively describe the server and the base station in the embodiment of the present application in detail from the perspective of the modular functional entity, and the server and the base station in the embodiment of the present application are described in detail from the perspective of hardware.

Fig. 13 is a schematic diagram of a server 1300 according to an embodiment of the present invention, which may include one or more Central Processing Units (CPUs) 1322 (e.g., one or more processors) and a memory 1332, and one or more storage media 1330 (e.g., one or more mass storage devices) storing applications 1342 or data 1344. Memory 1332 and storage medium 1330 may be, among other things, transitory or persistent storage. The program stored on the storage medium 1330 may include one or more modules (not shown), each of which may include a sequence of instructions operating on a server. Still further, the central processor 1322 may be arranged in communication with the storage medium 1330, executing a sequence of instruction operations in the storage medium 1330 on the server 1300.

The server 1300 may also include one or more power supplies 1326, one or more wired or wireless network interfaces 1350, one or more input-output interfaces 1358, and/or one or more operating systems 1341, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

The steps performed by the server in the above embodiment may be based on the server structure shown in fig. 13.

Fig. 14 is a schematic structural diagram of a base station 1400 according to an embodiment of the present invention, where the base station 1400 may have a relatively large difference due to different configurations or performances, and may include one or more Central Processing Units (CPUs) 1422 (e.g., one or more processors) and a memory 1432, and one or more storage media 1430 (e.g., one or more mass storage devices) for storing applications 1442 or data 1444. Memory 1432 and storage media 1430, among other things, may be transient or persistent storage. The program stored in storage medium 1430 may include one or more modules (not shown), each of which may include a sequence of instructions for operating on the base station. Still further, a central processor 1422 may be disposed in communication with the storage medium 1430 for executing a series of instruction operations in the storage medium 1430 at the base station 1400.

The base station 1400 may also include one or more power supplies 1426, one or more wired or wireless network interfaces 1450, one or more input-output interfaces 1458, and/or one or more operating systems 1441, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

The steps performed by the base station in the above embodiments may be based on the base station structure shown in fig. 14.

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

The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, e.g., the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

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

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

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

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

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

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A method for transmitting data, the method comprising:

the method comprises the following steps that a server receives air interface bandwidth representation information sent by a base station, wherein the air interface bandwidth representation information is used for indicating the data transmission rate of an air interface of the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI);

the server sends target data according to the air interface bandwidth characterization information;

the sending, by the server, the target data according to the air interface bandwidth characterization information includes:

the server sends the target data according to the air interface bandwidth representation information and a target buffer storage amount, wherein the target buffer storage amount is the data amount of the target data needing to be cached by the base station;

before the server receives the representation information of the air interface bandwidth sent by the base station, the method further includes:

the server receives an available cache message sent by the base station, wherein the available cache message comprises an available cache space and a concurrent data stream number, the available cache space is used for indicating the available cache space of a Radio Bearer (RB) where the target data is located, and the concurrent data stream number is used for indicating the number of services occupying the available cache space at the same time;

and the server determines the target caching amount according to the available caching space, the number of the concurrent data streams and the initial bandwidth.

2. The method of claim 1, wherein before the server determines a target amount of buffering based on the available buffer space, the number of concurrent data streams, and an initial bandwidth, the method further comprises:

the server sends an initial performance detection packet to the base station, wherein the initial performance detection packet is a continuous data packet;

the server receives a first Acknowledgement (ACK) fed back by a terminal, wherein the first ACK is an ACK sent by the terminal when the terminal receives the initial performance detection packet through the base station;

the server determines the initial bandwidth according to the reception interval of the first ACK.

3. The method of claim 2, wherein after the server determines a target amount of buffering based on the available buffer space, the number of concurrent data streams, and an initial bandwidth, the method further comprises:

the server determines the initial data sending amount of the target data according to the initial bandwidth, the initial time delay and the target buffer storage amount, wherein the initial time delay is determined by the server according to the receiving interval of the first ACK;

and the server sends the initial data sending quantity to the base station in an initial period.

4. The method according to claim 3, wherein the receiving, by the server, the air interface bandwidth characterization information sent by the base station includes:

and the server receives the representation information of the air interface bandwidth sent by the base station in a first period.

5. The method of claim 4, wherein after the server transmits the initial data transmission amount to the base station for an initial period, the method further comprises:

the server receives a service type sent by the base station, wherein the service type comprises a data stream type of target data;

and the server adjusts the target caching amount according to the available caching space, the number of the concurrent data streams, the initial bandwidth and the service type.

6. The method of claim 5, further comprising:

the server receives a second ACK fed back by the terminal in the first period, wherein the second ACK is an ACK sent by the terminal when the terminal receives data sent by the server in the period before the first period;

and the server determines a correction value according to the data transmission amount of the first period and the second ACK.

7. The method according to claim 6, wherein the sending, by the server, the target data according to the air interface bandwidth characterization information includes:

and the server sends the target data according to the air interface bandwidth characterization information and the correction value in a second period, wherein the second period is a period subsequent to the first period, and the first period and the second period are adjacent periods.

8. A method for transmitting data, the method comprising:

the method comprises the steps that a base station sends air interface bandwidth representation information to a server, so that the server sends target data according to the air interface bandwidth representation information and a target caching amount, the air interface bandwidth representation information indicates the data transmission rate of an air interface of the base station, the target caching amount is the data amount needing to be cached by the base station, and the air interface bandwidth representation information comprises one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI);

before the base station sends the air interface bandwidth characterization information to the server, the method further includes:

the base station sends an available cache message to the server, wherein the available cache message comprises an available cache space and a number of concurrent data streams, so that the server determines a target cache amount according to the available cache message and an initial bandwidth, the available cache space is the available cache space of a Radio Bearer (RB) where the target data is located, and the number of the concurrent data streams is the number of services occupying the available cache space at the same time.

9. The method of claim 8, further comprising:

the base station identifies the service type of the target data according to the data stream characteristics of the target data sent by the terminal;

and the base station sends the service type to the server so that the server adjusts the target caching amount according to the service type, the available caching space, the number of concurrent data streams and the initial bandwidth.

10. A server, characterized in that the server comprises:

a first receiving unit, configured to receive air interface bandwidth characterization information sent by a base station, where the air interface bandwidth characterization information is used to indicate a data transmission rate of an air interface of the base station, and the air interface bandwidth characterization information includes one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI);

a first sending unit, configured to send target data according to the air interface bandwidth characterization information;

the first sending unit is specifically configured to:

sending the target data according to the air interface bandwidth characterization information and a target buffer memory amount, wherein the target buffer memory amount is a data amount of the target data to be cached by the base station;

the server further comprises:

a second receiving unit, configured to receive an available buffer message sent by the base station, where the available buffer message includes an available buffer space and a number of concurrent data streams, the available buffer space is used to indicate an available buffer space of a radio bearer RB where the target data is located, and the number of concurrent data streams is used to indicate a number of services occupying the available buffer space at the same time;

and the first determining unit is used for determining a target buffer amount according to the available buffer space, the number of the concurrent data streams and the initial bandwidth.

11. The server according to claim 10, further comprising:

a second sending unit, configured to send an initial performance probe packet to the base station, where the initial performance probe packet is a continuous data packet;

a third receiving unit, configured to receive a first acknowledgement ACK fed back by a terminal, where the first ACK is an ACK sent by the terminal when the terminal receives the initial performance probe packet through the base station;

a second determining unit, configured to determine the initial bandwidth according to a reception interval of the first ACK.

12. The server according to claim 11, further comprising:

a third determining unit, configured to determine an initial data sending amount of the target data according to the initial bandwidth, an initial time delay, and the target buffer amount, where the initial time delay is determined by the server according to a receiving interval of the first ACK;

a third transmitting unit, configured to transmit the initial data transmission amount to the base station in an initial period.

13. The server according to claim 12, wherein the first receiving unit is specifically configured to:

and receiving the representation information of the air interface bandwidth sent by the base station in a first period.

14. The server according to claim 13, further comprising:

a fourth receiving unit, configured to receive a service type sent by the base station, where the service type includes a data stream type of target data;

a first adjusting unit, configured to adjust the target caching amount according to the available caching space, the number of concurrent data streams, the initial bandwidth, and the service type.

15. The server according to claim 14, further comprising:

a fifth receiving unit, configured to receive, in the first period, a second ACK fed back by the terminal, where the second ACK is an ACK sent by the server in a period before the first period and received by the terminal;

and the fourth determining unit is used for determining a correction value according to the data transmission amount of the first period and the second ACK.

16. The server according to claim 15, wherein the first sending unit is further specifically configured to:

and sending the target data according to the air interface bandwidth characterization information and the correction value in a second period, wherein the second period is a period subsequent to the first period, and the first period and the second period are adjacent periods.

17. A base station, characterized in that the base station comprises:

a first sending unit, configured to send air interface bandwidth characterization information to a server, so that the server sends target data according to the air interface bandwidth characterization information and a target buffer amount, where the air interface bandwidth characterization information indicates a data transmission rate of an air interface of a base station, the target buffer amount is a data amount that the base station needs to buffer, and the air interface bandwidth characterization information includes one or more of the following: the base station media access controls the scheduling rate of a Radio Link Control (RLC) layer Protocol Data Unit (PDU) by an MAC layer, the scheduling data volume of the PDU by the MAC layer, a Channel Quality Indicator (CQI) reported to the base station by a terminal or a Channel State Indicator (CSI) reported to the base station by the terminal, wherein the CSI comprises the Channel Quality Indicator (CQI), a Rank Indicator (RI) and a Precoding Matrix (PMI);

the base station further comprises:

a second sending unit, configured to send an available cache message to the server, where the available cache message includes an available cache space and a number of concurrent data streams, so that the server determines a target caching amount according to the available cache message and an initial bandwidth, the available cache space is an available cache space of a radio bearer RB where the target data is located, and the number of concurrent data streams is a number of services simultaneously occupying the available cache space.

18. The base station of claim 17, wherein the base station further comprises:

the identification unit is used for identifying the service type of the target data according to the data stream characteristics of the target data sent by the terminal;

a third sending unit, configured to send the service type to the server, so that the server adjusts the target caching amount according to the service type, the available cache space, the number of concurrent data streams, and the initial bandwidth.

19. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-7.

20. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 8-9.