CN114554611A

CN114554611A - Downlink data control method, device and storage medium of base station system

Info

Publication number: CN114554611A
Application number: CN202011333384.0A
Authority: CN
Inventors: 李伟; 孔健
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2022-05-27

Abstract

The application provides a downlink data control method, a device and a storage medium of a base station system, wherein the method comprises the following steps: determining the air interface resource scheduling data volume of the media intervention control MAC layer aiming at the downlink data in the current period according to the user equipment and the DRB; determining the buffer amount of air interface data required by a Radio Link Control (RLC) layer of the next period to an upper layer of a user plane (RLC) according to the air interface resource scheduling data amount of downlink data by the MAC layer in the current period; generating a flow request message according to the air interface data caching amount of the next period; sending the flow request message to an upper layer of a user plane (RLC); the flow request message is used to instruct the upper layer of the user plane RLC to send downlink data corresponding to the flow request message to the RLC layer. The technical problems that a downlink data control mode in the prior art causes a large amount of cache data in an RLC layer, so that the cache data is not sent out in the RLC layer for a long time, and further performance of a base station system is poor and memory occupation is excessive are solved.

Description

Downlink data control method, device and storage medium of base station system

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for controlling downlink data of a base station system, and a processor-readable storage medium.

Background

An NR (New Radio, New air interface) system has a strong air interface capability, a large amount of Data to be processed, and a large number of users, so that an SDAP (Service Data Adaptation Protocol) layer, a PDCP (Packet Data Convergence Protocol) layer, an RLC (Radio Link Control) layer, and an MAC (Media Access Control) layer are generally deployed in different processors or processing cores. If the downlink data sent by the core network is cached in the entry of the SDAP layer of the base station, the caching condition needs to be sent to the MAC layer through the PDCP layer and the RLC layer in a message or cache sharing mode and the like, so that the MAC layer carries out scheduling according to the caching condition, and after the MAC layer is scheduled, each layer is informed to carry out downlink group packaging according to the resource allocation condition of an air interface, and the time requirement of data sending of the air interface is difficult to meet.

In the related art, the downlink data control method of the base station system is as follows: after receiving the downlink data sent by the core network, the SDAP and PDCP processing is carried out in advance, and the data processed by the SDAP and PDCP is sent to the RLC layer for buffering. And the RLC layer sends the cache state to the MAC layer so that the MAC layer carries out air interface scheduling according to the cache state. The RLC layer carries out corresponding PDU group processing according to the scheduling result of the MAC layer and sends the PDU obtained by PDU group processing to the MAC layer for processing. However, this control method may cause a large amount of buffered data in the RLC layer, so that the buffered data is not sent out in the RLC layer for a long time, and further cause performance degradation and excessive memory occupation of the base station system.

Disclosure of Invention

The present application aims to solve at least one of the above mentioned technical problems to a certain extent.

Therefore, a first objective of the present application is to provide a downlink data control method for a base station system, so as to solve the technical problems that a downlink data control manner in the prior art causes a large amount of buffered data in an RLC layer, so that the buffered data is not sent out in the RLC layer for a long time, and further, performance of the base station system deteriorates and memory usage is too much.

A second objective of the present application is to provide another downlink data control method for a base station system.

A third objective of the present application is to provide a downlink data control apparatus of a base station system.

A fourth object of the present application is to provide another downlink data control apparatus for a base station system.

A fifth object of the present invention is to provide a downlink data control apparatus of a base station system.

A sixth object of the present application is to provide another downlink data control apparatus for a base station system.

A seventh object of the present application is to propose a processor-readable storage medium.

In order to achieve the above object, an embodiment of a first aspect of the present application provides a downlink data control method for a base station system, which is applied to a radio link control RLC layer in the base station system, and the method includes:

determining the air interface resource scheduling data volume of a media intervention control MAC layer aiming at downlink data in the current period according to user equipment and a Data Radio Bearer (DRB);

determining the buffer amount of air interface data required by a Radio Link Control (RLC) layer of the next period to an upper layer of a user plane (RLC) according to the air interface resource scheduling data amount of the downlink data by the MAC layer in the current period;

generating a flow request message according to the air interface data caching amount of the next period;

sending the flow request message to the upper layer of the user plane RLC; the flow request message is used to instruct the user plane RLC upper layer to send downlink data corresponding to the flow request message to the RLC layer.

In some embodiments of the present application, the determining, according to the amount of the air interface resource scheduling data of the downlink data by the MAC layer in the current period, an air interface data buffer amount that the radio link control RLC layer needs to request the upper layer of the user plane RLC, specifically includes:

determining a target DRB scheduled by the air interface resource in the current period from all DRBs according to the air interface resource scheduling data volume of the downlink data by the MAC layer in the current period;

determining the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period from the amount of the air interface resource scheduling data of the downlink data by the MAC layer in the current period;

and determining the buffer amount of the air interface data required to be requested by the RLC layer of the next period to the upper layer of the user plane according to the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period.

In some embodiments of the present application, the determining, according to the amount of air interface resource data scheduled by the MAC layer for the target DRB in the current period, an air interface data buffer amount that an RLC layer of a next period needs to request an upper layer of a user plane RLC specifically includes:

determining the maximum buffer storage amount of the RLC layer for caching data for the target DRB in a unit period according to the air interface resource data amount scheduled for the target DRB by the MAC layer in the current period;

determining the remaining unsent buffer memory amount after air interface resource scheduling aiming at the target DRB in the RLC layer;

determining a transmission mode of an RLC entity of the base station;

and determining the air interface data buffer amount required by the RLC layer of the next period to the upper layer of the user plane according to the maximum buffer amount, the residual unsent buffer amount and the transmission mode.

In some embodiments of the present application, the determining, according to the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period, a maximum buffer amount of the RLC layer for buffering data for the target DRB in a unit period specifically includes:

determining the data volume of the air interface resources scheduled by the MAC layer for the target DRB in each historical period in the previous N historical periods;

generating a smooth air interface capacity data volume of the RLC layer aiming at the target DRB in a unit period according to the air interface resource data volume scheduled for the target DRB by the MAC layer in each historical period and the air interface resource data volume scheduled for the target DRB by the MAC layer in the current period;

and determining the maximum buffer storage amount of the RLC layer for caching data for the target DRB in a unit period according to the smooth air interface capacity data amount and the first target coefficient of the RLC layer for the target DRB in the unit period.

In some embodiments of the present application, the determining, according to the maximum buffer amount, the remaining unsent buffer amount, and the transmission mode, an air interface data buffer amount that the RLC layer of the next period needs to request an upper layer of the RLC layer of the user plane specifically includes:

when the transmission mode is an UM mode, calculating the data buffer amount to be requested by the target DRB in the next period according to the maximum buffer amount and the residual unsent buffer amount;

when the transmission mode is an AM mode, determining the buffer amount of the target DRB needing to be retransmitted, and calculating the data buffer amount of the target DRB to be requested in the next period according to the maximum buffer amount, the remaining unsent buffer amount and the buffer amount needing to be retransmitted;

and determining the air interface data buffer amount required by the RLC layer of the next period to the upper layer of the user plane RLC according to the data buffer amount to be requested by the target DRB in the next period.

In some embodiments of the present application, the method further comprises:

and sending the smooth air interface capacity data volume of the RLC layer aiming at the target DRB in a unit period to the upper layer of the user plane RLC, so that the upper layer of the user plane RLC determines the maximum buffer storage volume of the upper layer of the user plane RLC for caching data of the target DRB according to the smooth air interface capacity data volume and a second target coefficient.

In order to achieve the above object, a second embodiment of the present application provides another downlink data control method for a base station system, which is applied to an upper layer of a user plane RLC in the base station system, and the method includes:

receiving a flow request message sent by an RLC layer; the flow request message is generated by the RLC layer according to the air interface resource scheduling data volume of the media access control MAC layer for downlink data in the current period, the air interface data buffer volume required by the RLC layer for requesting the upper layer of the user plane RLC in the next period, and the air interface data buffer volume of the next period, which is determined by the RLC layer according to the air interface resource scheduling data volume of the MAC layer for downlink data in the current period;

and sending corresponding downlink data to the RLC layer based on the flow request message and the size limit of the single-time sending data packet.

In some embodiments of the present application, the method further comprises:

receiving the smooth air interface capacity data volume of the RLC layer aiming at the target DRB in a unit period, wherein the data volume is sent by the RLC layer;

and determining the maximum buffer storage amount of the data cached by the upper layer of the user plane RLC for the target DRB according to the smooth air interface capacity data amount and a second target coefficient.

In some embodiments of the present application, the method further comprises:

counting the data volume of the current target DRB cache of the upper layer of the user plane RLC;

and when the current cached data volume is larger than the maximum caching volume, performing packet loss operation on the target DRB, or notifying the service level corresponding to the target DRB of congestion.

To achieve the above object, a third aspect of the present invention provides a downlink data control apparatus for a base station system, including: a memory, a transceiver, a processor; wherein, the first and the second end of the pipe are connected with each other,

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

In some embodiments of the present application, the determining, according to the amount of air interface resource data scheduled by the MAC layer for the target DRB in the current period, an air interface data buffer amount that the RLC layer of the next period needs to request an upper layer of a user plane RLC specifically includes:

determining the maximum buffer amount of the RLC layer for caching data for the target DRB in a unit period according to the air interface resource data amount scheduled for the target DRB by the MAC layer in the current period;

determining a transmission mode of an RLC entity of the base station;

In some embodiments of the present application, the determining, according to the maximum buffer amount, the remaining unsent buffer amounts, and the transmission mode, an air interface data buffer amount that a next cycle RLC layer needs to request an upper layer of a user plane RLC includes:

and determining the air interface data buffer amount required by the RLC layer of the next period to request the upper layer of the user plane RLC according to the data buffer amount to be requested by the target DRB in the next period.

In some embodiments of the present application, the processor further performs the following:

In order to achieve the above object, a fourth aspect of the present application provides another downlink data control apparatus for a base station system, including a memory, a transceiver, and a processor; wherein the content of the first and second substances,

In order to achieve the above object, a fifth embodiment of the present application provides a downlink data flow control apparatus of a base station system DRB, which is applied to a radio link control RLC layer in the base station system, and the apparatus includes:

a first determining unit, configured to determine, according to the user equipment and the data radio bearer DRB, an air interface resource scheduling data amount of the downlink data in the current period by the media access control MAC layer;

a second determining unit, configured to determine, according to the amount of air interface resource scheduling data of the downlink data in the current period by the MAC layer, an air interface data buffer amount that the radio link control RLC layer of the next period needs to request the upper layer of the user plane RLC;

a generating unit, configured to generate a traffic request message according to the air interface data buffer amount of the next period;

a sending unit, configured to send the traffic request message to the upper layer of the user plane RLC; the flow request message is used to instruct the user plane RLC upper layer to send downlink data corresponding to the flow request message to the RLC layer.

In order to achieve the above object, a sixth embodiment of the present application provides another downlink data control apparatus for a base station system, which is applied to an upper layer of a user plane RLC in the base station system, and the apparatus includes:

a receiving unit, configured to receive a flow request message sent by an RLC layer; the flow request message is generated by the RLC layer according to the air interface resource scheduling data volume of the media access control MAC layer for downlink data in the current period, the air interface data buffer volume required by the RLC layer for requesting the upper layer of the user plane RLC in the next period, and the air interface data buffer volume of the next period, which is determined by the RLC layer according to the air interface resource scheduling data volume of the MAC layer for downlink data in the current period;

and a sending unit, configured to send corresponding downlink data to the RLC layer based on the flow request message and the size limit of the single-time-sent data packet.

To achieve the above object, a seventh aspect of the present application provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to enable the processor to execute the downlink data control method of the base station system according to the first aspect of the present application, or execute the downlink data control method of the base station system according to the second aspect of the present application.

The technical scheme provided by the embodiment of the application at least has the following beneficial effects:

the method comprises the steps of determining the air interface resource scheduling data volume of a media intervention control (MAC) layer aiming at downlink data in the current period according to user equipment and a Data Radio Bearer (DRB), determining the air interface data buffer volume required by a Radio Link Control (RLC) layer of the next period to request an upper layer of a user plane (RLC) according to the air interface resource scheduling data volume of the MAC layer aiming at the downlink data in the current period, generating a flow request message according to the air interface data buffer volume of the next period, and sending the flow request message to the upper layer of the user plane (RLC) so that the upper layer of the user plane (RLC) sends downlink data corresponding to the flow request message to the RLC layer. Therefore, according to the method and the device, the historical air interface capacity of the MAC is counted through the RLC, the upper layer is requested to send the data with enough air interface capacity in advance, the data cached by the RLC can guarantee the maximum transmission capacity of the air interface, the DRB downlink of the RLC only caches the data capable of meeting the MAC downlink air interface scheduling, the cached data of all layers of the base station are reduced, the total data cache of the downlink of the base station is guaranteed to be matched with the downlink air interface capacity of the base station, the memory occupation of a base station system can be reduced, and the performance of the base station system is guaranteed.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of the NR system NG-RAN user plane data link layer architecture;

fig. 2 is a schematic flowchart of a downlink data control method of a base station system according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a downlink data control method of a base station system according to another embodiment of the present application;

fig. 4 is a flowchart illustrating a downlink data control method of another base station system according to an embodiment of the present application;

fig. 5 is a block diagram of a downlink data control apparatus of a base station system according to an embodiment of the present application;

fig. 6 is a block diagram of a downlink data control apparatus of another base station system according to an embodiment of the present application;

fig. 7 is a block diagram of a downlink data control apparatus of another base station system according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.

Note that, as shown in fig. 1, the NR system NG-RAN (next generation radio access network) user plane data link layer includes the SDAP, PDCP, RLC, and MAC protocols. The data flow in the downlink direction of the base station is processed as follows: when receiving user plane Data sent by a core network through a GTP-U (GPRS tunneling Protocol for the user plane, GPRS tunneling Protocol of a user plane), the SDAP layer completes mapping from a QoS (Quality of Service) flow to a DRB (Data Radio Bearer); after completing header compression, integrity protection and encryption operation of Data, the PDCP layer sends a PDCP PDU (Protocol Data Unit) to the RLC layer; the RLC layer completes RLC SDU (Service Data Unit) segmentation, an AM (Acknowledged Mode) Mode ARQ (Automatic Repeat-reQuest) error correction function and reports a cache state to the MAC layer; and the MAC layer performs air interface scheduling and MAC PDU packing according to the buffer state of the RLC and sends the MAC PDU to the physical layer.

An NR (New Radio, New air interface) system has a strong air interface capability, a large amount of Data to be processed, and a large number of users, so that an SDAP (Service Data Adaptation Protocol) layer, a PDCP (Packet Data Convergence Protocol) layer, an RLC (Radio Link Control) layer, and an MAC (Media Access Control) layer are generally deployed in different processors or processing cores. If the downlink data sent by the core network is cached in the entry of the SDAP layer of the base station, the caching condition needs to be sent to the MAC layer through the PDCP layer and the RLC layer in a message or cache sharing mode and the like, so that the MAC layer carries out scheduling according to the caching condition, and after the MAC layer is scheduled, each layer is informed to carry out downlink group packaging according to the resource allocation condition of an air interface, and the time requirement of data sending of the air interface is difficult to meet. Therefore, after receiving the data sent by the core network, the base station generally performs the SDAP and PDCP processing in advance, and sends the data that has been processed by the SDAP and PDCP processing to the RLC layer for buffering. And the RLC layer sends the cache state to the MAC layer so that the MAC layer carries out air interface scheduling according to the cache state. The RLC layer carries out corresponding PDU group processing according to the scheduling result of the MAC layer and sends the PDU obtained by PDU group processing to the MAC layer for processing.

However, for the unacknowledged protocol such as UDP based upper layer service, the DRBs corresponding to the PDCP and RLC base stations generally adopt UM mode for data transmission. In the UM mode, since no opposite end confirmation is required and no flow control mechanism is provided, the upper layer sends the UDP packet sent by the core network to the RLC layer after being processed by the SDAP protocol and the PDCP protocol. Because the UM mode may send data to the terminal without considering the actual transmission capability of the air interface, if the amount of data sent far exceeds the actual transmission capability of the air interface, the processing capability of the base station may be greatly increased, and a large amount of cached data may not be sent out in the RLC for a long time, which may greatly affect both the system performance of the base station and the memory usage.

For the upper layer service based on the acknowledgement protocol such as TCP, the DRBs corresponding to the PDCP and RLC generally adopt AM mode for data transmission. The TCP has flow control of a protocol layer, which is related to the number of threads of the TCP and the set size of a TCP window, and the set size is generally fixed and does not change with the change of the air interface capability. The air interface capability is closely related to the configured number of streams, environment, air interface condition, etc., and may vary greatly, which may cause the actual transmission capability of the air interface and the rate of the TCP to be also mismatched. There are also situations where a large amount of data is buffered in the RLC layer, which affects the performance of the base station system.

Therefore, in order to solve the technical problems that a downlink data control mode in the prior art causes a large amount of cache data in an RLC layer, so that the cache data cannot be sent out in the RLC layer for a long time, and further causes performance deterioration of a base station system and excessive memory occupation, the application provides a downlink data control method, a device and a storage medium of the base station system, so that DRB downlink of the RLC layer in the base station system can only cache data which can meet MAC layer downlink air interface scheduling, cache data of each layer of the base station is reduced, and the total downlink data caching amount of the base station can be guaranteed to be matched with the downlink air interface capability of the base station. Specifically, a downlink data control method, an apparatus, and a storage medium of a base station system according to an embodiment of the present application are described below with reference to the drawings.

Fig. 2 is a flowchart illustrating a downlink data control method of a base station system according to an embodiment of the present application. It should be noted that the downlink data control method of the base station system in the embodiment of the present application may be applied to an RLC layer in the base station system. That is, the downlink data control method of the base station system according to the embodiment of the present application can be described from the RLC layer side.

As shown in fig. 2, the downlink data control method of the base station system may include the following steps:

in step 201, the amount of data scheduled by the media access control MAC layer for the air interface resource of the downlink data in the current period is determined according to the user equipment and the data radio bearer DRB.

In this embodiment of the present application, downlink MAC resource scheduling conditions in the current period may be counted according to each user equipment and each DRB, so as to obtain a total amount of air interface resource scheduling data allocated to each user equipment and each DRB by the MAC layer in the current period in an accumulated manner.

Optionally, in some embodiments of the present application, the duration of the period may be preconfigured. The setting of the duration needs to comprehensively consider air interface configuration (such as air interface bandwidth and time slot format configuration), etc., so as to ensure that the buffered data in the period can meet the sending capability of the air interface, and at the same time, not buffer too much data exceeding the transmission capability of the air interface.

In step 202, according to the amount of the air interface resource scheduling data of the downlink data by the MAC layer in the current period, the amount of the air interface data buffering required by the RLC layer of the radio link control in the next period to the RLC upper layer of the user plane is determined.

Optionally, after the downlink time slot is packed into the MAC packet, the buffer amount of the air interface data that needs to be requested to the upper layer of the user plane RLC in the next period is calculated according to the air interface resource scheduling data amount of the downlink data in the current period by the MAC layer.

In some embodiments of the present application, a target DRB scheduled by an air interface resource in a current period may be determined from all DRBs according to an air interface resource scheduling data volume of a MAC layer for downlink data in the current period, and an air interface resource data volume scheduled for the target DRB by the MAC layer in the current period is determined from the air interface resource scheduling data volume of the MAC layer for downlink data in the current period, and then an air interface data buffer amount that the RLC layer of a next period needs to request an upper layer of the RLC layer of the user plane according to the air interface resource data volume scheduled for the target DRB by the MAC layer in the current period.

That is to say, the DRBs scheduled by the air interface resource can be determined from all DRBs, and the buffer amount of the air interface data required to be requested to the upper layer of the user plane RLC is calculated only for the DRBs scheduled with the air interface resource, and the DRBs not scheduled with the air interface resource do not need to request data again. Therefore, the data volume required by the next period is predicted according to the air interface capacity of the current period of the RLC, the upper layer is requested to send the data with enough air interface capacity after the MAC schedules the sending of the data, and the time point and the data volume of the data request are dispersed.

In some embodiments of the present application, as shown in fig. 3, the specific implementation process of determining, according to the amount of air interface resource data scheduled by the MAC layer for the target DRB in the current period, an air interface data buffer amount that the RLC layer in the next period needs to request the upper layer of the user plane RLC may include:

step 301, determining the maximum buffer storage amount of the RLC layer for caching data for the target DRB in a unit period according to the amount of the air interface resource data scheduled for the target DRB by the MAC layer in the current period.

In some embodiments of the present application, an empty resource data amount scheduled by the MAC layer for the target DRB in each of the first N history periods may be determined, a smooth empty capacity data amount of the RLC layer for the target DRB in a unit period may be generated according to the empty resource data amount scheduled by the MAC layer for the target DRB in each history period and the empty resource data amount scheduled by the MAC layer for the target DRB in the current period, and then a maximum buffer amount of the RLC layer for the target DRB cache data in the unit period may be determined according to the smooth empty capacity data amount of the RLC layer for the target DRB in the unit period and the first target coefficient.

Optionally, for scheduling of the target DRB, smoothing may be performed on the air interface capability of each history period according to the air interface resource data amount of each history period in the previous N history periods and the air interface resource data amount in the current period, to obtain a smoothed air interface capability data amount of the RLC layer for the target DRB in a unit period, then performing multiplication calculation on the smoothed air interface capability data amount of the RLC layer for the target DRB in the unit period and a first target coefficient, and determining an obtained product as a maximum buffer storage amount of the RLC layer for caching data of the target DRB in the unit period.

As an example, the smoothing process may be implemented by the following formula:

the quantity of the smooth air interface capacity data is (the quantity of the air interface resource data in the current period is a percentage smoothing coefficient) + the quantity of the smooth air interface capacity data calculated in the previous period is (1-percentage smoothing coefficient);

wherein, the percentage smoothing coefficient can be preset. Therefore, the smooth air interface capacity calculated by referring to the data volumes of the current air interface and the historical air interface can effectively avoid burst jitter and ensure the stability of the data volume.

In an embodiment of the present application, the first target coefficient may be an amplification coefficient. The amplification factor is mainly set to ensure that the data of the upper layer can be quickly adapted to the transmission capability of the air interface. As an example, the setting of the size of the amplification factor may be decided by the size of the data amount currently buffered by the RLC layer, for example, if the currently buffered data amount is smaller, the amplification factor may be set larger, and if the currently buffered data amount is larger, the amplification factor may be configured smaller.

Step 302, determining the remaining unsent buffer memory after air interface resource scheduling for the target DRB in the RLC layer.

Step 303, determine the transmission mode of the RLC entity of the base station.

That is, it is possible to determine which mode the RLC entity in the base station system employs for data transmission. In the embodiment of the present application, the transmission mode may include a UM mode and an AM mode.

And step 304, determining the air interface data buffer amount required by the RLC layer of the next period to the upper layer of the user plane RLC according to the maximum buffer amount, the remaining unsent buffer amount and the transmission mode.

It can be understood that, different transmission modes are adopted by the RLC entity, the calculation manner of the buffer amount of the air interface data that the RLC layer of the next period needs to request the upper layer of the user plane RLC is also different. In some embodiments of the present application, when the transmission mode is the UM mode, the data buffering amount to be requested by the target DRB in the next period is calculated according to the maximum buffering amount and the remaining unsent buffering amount. As an example, when the transmission mode is the UM mode, the remaining unsent buffer amount may be subtracted from the maximum buffer amount, and the obtained difference is determined as the data buffer amount to be requested by the target DRB in the next period, and then, the empty data buffer amount required by the RLC layer of the next period to the upper layer of the user plane RLC is determined according to the data buffer amount to be requested by the target DRB in the next period.

In an embodiment of the present application, when the transmission mode is an AM mode, determining a buffer amount that the target DRB needs to retransmit, and calculating a data buffer amount that the target DRB waits for a request in the next period according to the maximum buffer amount, the remaining unsent buffer amount, and the buffer amount that needs to retransmit. As an example, when the transmission mode is the AM mode, the buffer amount of the target DRB that needs to be retransmitted may be determined, and the remaining unsent buffer amount and the buffer amount that needs to be retransmitted are subtracted from the maximum buffer amount, and the obtained difference is determined as the data buffer amount that the target DRB will request in the next period, and then, the buffer amount of the air interface data that the RLC layer in the next period needs to request the upper layer of the user plane RLC is determined according to the data buffer amount that the target DRB will request in the next period. The buffer amount of the air interface data required to be requested to the upper layer of the user plane RLC includes buffer amounts of the air interface data of all users and DRBs required to be requested.

That is to say, for the UM mode, the maximum buffer amount of the target DRB buffer data in the unit period of the RLC layer may be subtracted by the remaining unsent buffer amount of the RLC layer after scheduling the air interface resource for the target DRB, and the obtained difference is the data buffer amount to be requested by the target DRB in the next period, then, the data buffer amounts to be requested by all the target DRBs in the next period are counted, and the total data buffer amount to be requested obtained after counting is used as the air interface data buffer amount that the RLC layer of the next period needs to request the upper layer of the user plane RLC.

For the AM mode, the maximum buffer storage amount of the target DRB buffer data in the unit period of the RLC layer may be subtracted by the remaining unsent buffer storage amount and the buffer storage amount required to be retransmitted in the RLC layer after the air interface resource scheduling for the target DRB, and the obtained difference is the data buffer storage amount to be requested by the target DRB in the next period, then the data buffer storage amounts to be requested by all the target DRBs in the next period are counted, and the total data buffer storage amount to be requested obtained after counting is used as the air interface data buffer storage amount required by the RLC layer of the next period to the upper layer of the user plane RLC.

Therefore, for the UM mode, only the data with the maximum air interface capability in the caching period is needed, and for the AM mode, only the unacknowledged packet, the retransmitted packet and the data meeting the air interface capability of the RLC terminal in the caching state report period are needed, so that the data volume cached by the RLC is greatly reduced, and the RLC dynamic memory occupation is reduced.

In step 203, a traffic request message is generated according to the air interface data buffer amount of the next period.

That is, after determining the buffer amount of air interface data that the radio link control RLC layer needs to request the upper layer of the user plane RLC in the next period, the corresponding flow request message may be generated according to the buffer amount of air interface data that the radio link control RLC layer needs to request the upper layer of the user plane RLC in the next period, where the flow request message includes all users and DRBs that need to request.

In step 204, sending the flow request message to the upper layer of the user plane RLC; the flow request message is used to instruct the upper layer of the user plane RLC to send downlink data corresponding to the flow request message to the RLC layer.

Optionally, each time slot, a flow request message is sent to the upper layer of the user plane RLC, where the flow request message includes all users and DRBs that need to be requested, so that the upper layer of the user plane RLC sends corresponding downlink data to the RLC layer according to the requested data volume in the flow request message when receiving the flow request message.

Optionally, in some embodiments of the present disclosure, the smooth air interface capability data amount of the RLC layer for the target DRB in a unit period is sent to the upper layer of the user plane RLC, so that the upper layer of the user plane RLC determines the maximum buffer amount of the data cached by the upper layer of the user plane RLC for the target DRB according to the smooth air interface capability data amount and the second target coefficient.

That is, the RLC layer may send the smooth air interface capability data amount for the target DRB in a unit period to the user plane RLC upper layer. The upper layer of the user plane RLC can calculate the maximum buffer amount according to the actual capacities of each user and the DRB of the RLC layer, and the maximum buffer amount can be obtained by multiplying the smooth air interface capacity data volume reported by the RLC layer by a second target coefficient, so that the data volume cached by the upper layer of the user plane RLC can not exceed the maximum buffer amount, and the maximum data volume cached by the upper layer of the user plane RLC is related to the air interface capacity. In the embodiment of the present application, the second target coefficient may be an amplification coefficient.

It should be noted that, although both the first target coefficient and the second target coefficient may be amplification coefficients, the amplification coefficient corresponding to the first target coefficient and the amplification coefficient corresponding to the second target coefficient are different. The amplification factor corresponding to the first target factor is to calculate a desired maximum buffer number of the RLC, that is, the previously calculated smooth data volume of the air interface is a data volume that can be transmitted by the historical air interface, but the requested data volume needs to be larger than the data volume that can be transmitted by the air interface, so if the upper layer has more data and the air interface still has the capacity to transmit, the data can be quickly transmitted, but the requested data volume is not too large, so that the buffer amount of the RLC is increased, and thus an amplification factor is increased. The amplification factor corresponding to the second target coefficient is a maximum data amount that can be buffered by the upper layer in order to calculate, that is, the maximum requested data amount reported by the RLC is a data amount that can be sent to the RLC by the upper layer in the reporting period, and the amount of other data that can be buffered by the upper layer is determined by the maximum data amount of the upper layer. The first target coefficient and the second target coefficient are two different coefficients, which can be configured separately.

According to the downlink data control method of the base station system in the embodiment of the application, the amount of air interface resource scheduling data of a Media Access Control (MAC) layer for downlink data in the current period can be determined according to user equipment and a Data Radio Bearer (DRB), the amount of air interface data buffering required by a Radio Link Control (RLC) layer of the next period to an RLC upper layer of a user plane is determined according to the amount of air interface resource scheduling data of the MAC layer for the downlink data in the current period, then a flow request message is generated according to the amount of air interface data buffering of the next period, and the flow request message is sent to the RLC upper layer of the user plane, so that the RLC upper layer of the user plane sends the downlink data corresponding to the flow request message to the RLC layer. Therefore, according to the method and the device, the historical air interface capacity of the MAC is counted through the RLC, the upper layer is requested to send the data with enough air interface capacity in advance, the data cached by the RLC can guarantee the maximum transmission capacity of the air interface, the DRB downlink of the RLC only caches the data which can meet the dispatching of the MAC downlink air interface, the cached data of all layers of the base station are reduced, the total downlink data cache of the base station is guaranteed to be matched with the downlink air interface capacity of the base station, the memory occupation of the base station system can be reduced, and the performance of the base station system is guaranteed.

In order to implement the above embodiments, the present application further provides another downlink data control method for a base station system. Fig. 4 is a flowchart illustrating another downlink data control method for a base station system according to an embodiment of the present application. It should be noted that the downlink data control method of the base station system in the embodiment of the present application may be applied to the upper layer of the user plane RLC in the base station system. That is, the downlink data control method of the base station system according to the embodiment of the present application can be described from the upper layer side of the user plane RLC.

It should be further noted that, in the embodiment of the present application, the upper layer of the user plane RLC may include PDCP and SDAP, and the processing of the SDAP is relatively simple, so that the PDCP and the SDAP are deployed together for processing.

As shown in fig. 4, the downlink data control method of the base station system may include the following steps:

in step 401, a traffic request message sent by the RLC layer is received.

In this embodiment of the present application, the flow request message is generated by the RLC layer according to the user equipment and the data radio bearer DRB, determining an air interface resource scheduling data amount of the downlink data by the media access control MAC layer in the current period, determining an air interface data buffer amount that the RLC layer of the next period needs to request the upper layer of the user plane RLC according to the air interface resource scheduling data amount of the downlink data by the MAC layer in the current period, and according to the air interface data buffer amount of the next period.

That is to say, the RLC layer may determine, according to the user equipment and the data radio bearer DRB, an air interface resource scheduling data amount of the MAC layer for downlink data in the current period, determine an air interface data buffer amount that the radio link control RLC layer of the next period needs to request the upper layer of the user plane RLC according to the air interface resource scheduling data amount of the MAC layer for downlink data in the current period, generate a flow request message according to the air interface data buffer amount of the next period, and send the flow request message to the upper layer of the user plane RLC. Wherein, the traffic request message includes all users and DRBs that need to be requested.

In step 402, corresponding downlink data is transmitted to the RLC layer based on the traffic request message and the single-transmission packet size limit.

Optionally, when receiving the flow request message sent by the RLC layer, the upper layer of the user plane RLC may send corresponding downlink data to the RLC layer according to the flow request message and the size limit of the single-time-sent data packet. That is, when transmitting the requested data amount to the RLC layer, the size of the single transmission packet needs to be controlled to avoid that the single-user single DRB one-time packet transmission time is too long.

It should be noted that, in some embodiments of the present application, when the upper layer of the user plane RLC receives a GTP-U packet before the next RLC reports the current limit, if the full requested data size is not sent, the upper layer of the user plane RLC continues to limit the packet sending to the RLC according to the requested data size and the data size of a single packet sending. Wherein, the upper layer of the user plane RLC can send the buffer packet first and then send the GTP-U to the upper layer after sending the buffer packet. In the embodiment of the application, the subsequent GTP-U packets exceeding the limit may be buffered in the upper layer sending buffer queue, and the maximum buffering amount does not exceed the maximum buffering number of the DRB.

It should be further noted that the maximum data volume cached by the upper layer of the user plane RLC is related to the air interface capability, and in some embodiments of the present application, the smooth air interface capability data volume of the RLC layer for the target DRB in a unit period sent by the RLC layer may be received, and the maximum caching volume of the data cached by the upper layer of the user plane RLC for the target DRB is determined according to the smooth air interface capability data volume and the second target coefficient. That is, the maximum buffer amount of the upper layer of the user plane RLC may be configured by using the smooth air interface capability data amount sent by the RLC layer and the second target coefficient, so that the data amount cached by the upper layer of the user plane RLC matches the air interface capability.

In some embodiments of the present application, a data amount currently cached by an upper layer of a user plane RLC for a target DRB may be counted, and when the currently cached data amount is greater than a maximum caching amount, a packet loss operation is performed on the target DRB, or a service plane corresponding to the target DRB is notified of congestion.

That is, when the amount of data buffered in the upper layer of the user plane RLC exceeds the maximum buffer amount, a discard mechanism may be adopted or service plane congestion may be notified, where the discard mechanism may be to randomly discard buffered packets and store new packets, or directly discard the latest packets. Therefore, after the fact that the cache data of the base station entrance exceeds the threshold of the air interface for a certain capacity is judged, mechanisms such as packet loss or congestion notification can be adopted, and therefore the fact that the whole cache of the base station is matched with the capacity of the air interface is guaranteed.

According to the downlink data control method of the base station system in the embodiment of the application, when the flow request message sent by the RLC layer is received, the corresponding downlink data is sent to the RLC layer based on the flow request message and the size limit of the single-time sending data packet. The flow request message is generated by the RLC layer according to the user equipment and the data radio bearer DRB, determining the air interface resource scheduling data volume of the media access control MAC layer for the downlink data in the current period, determining the air interface data buffer volume required by the RLC layer of the next period to request the upper layer of the user plane RLC according to the air interface resource scheduling data volume of the MAC layer for the downlink data in the current period, and according to the air interface data buffer volume of the next period. Therefore, the historical air interface capacity of the MAC is counted through the RLC, the upper layer is requested to send data with enough air interface capacity in advance, the data cached by the RLC can guarantee the maximum transmission capacity of the air interface, the DRB downlink of the RLC only caches the data which can meet the dispatching requirement of the MAC downlink air interface, the cached data of all layers of the base station are reduced, the total data cache of the downlink of the base station is guaranteed to be matched with the downlink air interface capacity of the base station, the memory occupation of the base station system can be reduced, and the performance of the base station system is guaranteed.

In order to implement the foregoing embodiments, the present application further provides a downlink data control apparatus of a base station system. It should be noted that the downlink data control apparatus of the base station system according to the embodiment of the present application is applicable to the RLC layer in the base station system. As shown in fig. 5, the downlink data control apparatus of the base station system may include: memory 501, transceiver 502, and processor 503. Wherein, the memory 501 is used for storing computer programs; the transceiver 502 is used for transceiving data under the control of the processor 503.

Wherein in fig. 5 the bus architecture may comprise any number of interconnected buses and bridges, in particular one or more processors represented by the processor 503 and various circuits of the memory represented by the memory 501 being 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 502 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 503 is responsible for managing the bus architecture and general processing, and the memory 501 may store data used by the processor 503 in performing operations.

The processor 503 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

In the embodiment of the present application, the processor 503 may be configured to read the computer program in the memory and perform the following operations:

step 501', determining the amount of air interface resource scheduling data of the media intervention control MAC layer for downlink data in the current period according to the user equipment and the data radio bearer DRB.

Step 502', according to the amount of air interface resource scheduling data of the downlink data by the MAC layer in the current period, determining the amount of air interface data buffer required by the radio link control RLC layer of the next period to the upper layer of the user plane RLC.

In some embodiments of the present application, a target DRB scheduled by an air interface resource in a current period is determined from all DRBs according to an air interface resource scheduling data volume of downlink data by an MAC layer in the current period; determining the air interface resource data amount scheduled by the MAC layer for the target DRB in the current period from the air interface resource scheduling data amount of the downlink data in the MAC layer in the current period; and determining the buffer amount of air interface data required to be requested by the RLC layer of the next period to the upper layer of the user plane RLC according to the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period.

In some embodiments of the present application, a specific implementation process of determining, according to an amount of air interface resource data scheduled by the MAC layer for the target DRB in the current period, an air interface data buffer amount that the RLC layer of the next period needs to request the upper layer of the user plane RLC may be as follows: determining the maximum buffer storage amount of the RLC layer for caching data for the target DRB in a unit period according to the air interface resource data amount scheduled for the target DRB by the MAC layer in the current period; determining the residual unsent buffer memory amount after the scheduling of the air interface resource aiming at the target DRB in the RLC layer; determining a transmission mode of an RLC entity of a base station; and determining the air interface data buffer amount required by the RLC layer of the next period to the upper layer of the user plane RLC according to the maximum buffer amount, the residual unsent buffer amount and the transmission mode.

As an example, the specific implementation process of determining the maximum buffer amount of the RLC layer for caching data for the target DRB in the unit period according to the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period may be as follows: determining the data volume of the air interface resources scheduled by the MAC layer for the target DRB in each of the previous N historical periods; generating a smooth air interface capacity data volume of the RLC layer aiming at the target DRB in a unit period according to the air interface resource data volume scheduled for the target DRB by the MAC layer in each historical period and the air interface resource data volume scheduled for the target DRB by the MAC layer in the current period; and determining the maximum buffer storage amount of the data cached by the RLC layer for the target DRB in the unit period according to the smooth air interface capacity data amount and the first target coefficient of the RLC layer for the target DRB in the unit period.

In this embodiment of the present application, the specific implementation process of determining the buffer amount of the air interface data that the RLC layer of the next period needs to request the upper layer of the user plane RLC according to the maximum buffer amount, the remaining unsent buffer amount, and the transmission mode may be as follows: when the transmission mode is the UM mode, calculating the data buffer amount to be requested by the target DRB in the next period according to the maximum buffer amount and the residual unsent buffer amount; when the transmission mode is the AM mode, determining the buffer amount of the target DRB needing to be retransmitted, and calculating the data buffer amount of the target DRB to be requested in the next period according to the maximum buffer amount, the remaining unsent buffer amount and the buffer amount needing to be retransmitted; and determining the air interface data buffer amount required by the RLC layer of the next period to the upper layer of the user plane RLC according to the data buffer amount to be requested by the target DRB in the next period.

Step 503', according to the air interface data buffer amount of the next period, a flow request message is generated.

Step 504', sending the flow request message to the upper layer of the user plane RLC; the flow request message is used to instruct the upper layer of the user plane RLC to send downlink data corresponding to the flow request message to the RLC layer.

In some embodiments of the present application, the processor 503 further performs the following operations: and sending the smooth air interface capacity data volume of the RLC layer aiming at the target DRB in a unit period to an upper layer of the user plane RLC, so that the upper layer of the user plane RLC determines the maximum buffer storage volume of the data cached by the upper layer of the user plane RLC for the target DRB according to the smooth air interface capacity data volume and a second target coefficient.

It should be noted that the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated herein.

In order to implement the above embodiments, the present application further provides another downlink data control apparatus for a base station system. It should be noted that the downlink data control apparatus of the base station system according to the embodiment of the present application is applicable to the upper layer of the user plane RLC in the base station system. The downlink data control apparatus of the base station system may include: a memory, a transceiver, and a processor. Wherein the memory is used for storing a computer program; the transceiver is used for transceiving data under the control of the processor; the processor is used for reading the computer program in the memory and executing the following operations:

step 601', receiving a traffic request message sent by the RLC layer.

The flow request message is generated by the RLC layer according to the user equipment and the data radio bearer DRB, determining the air interface resource scheduling data volume of the media access control MAC layer for the downlink data in the current period, determining the air interface data buffer volume required by the RLC layer of the next period to request the upper layer of the user plane RLC according to the air interface resource scheduling data volume of the MAC layer for the downlink data in the current period, and according to the air interface data buffer volume of the next period.

Step 602', based on the flow request message and the size limitation of the single-time-transmission data packet, corresponding downlink data is transmitted to the RLC layer.

In some embodiments of the present application, the processor further performs the following: receiving the smooth air interface capacity data quantity of the RLC layer aiming at the target DRB in a unit period, wherein the data quantity is sent by the RLC layer; and determining the maximum buffer storage amount of the data cached by the upper layer of the user plane RLC for the target DRB according to the smooth air interface capacity data amount and the second target coefficient.

In some embodiments of the present application, the processor further performs the following: counting the data volume of the current target DRB cache of the upper layer of the user plane RLC; and when the current cached data volume is larger than the maximum caching volume, performing packet loss operation on the target DRB, or notifying the service level corresponding to the target DRB of congestion.

It should be noted that, the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

In order to implement the foregoing embodiment, the present application further provides another downlink data control apparatus of a base station system. It should be noted that the downlink data control apparatus of the base station system according to the embodiment of the present application is applicable to the RLC layer in the base station system. As shown in fig. 6, the downlink data control apparatus 600 of the base station system may include: a first determining unit 601, a second determining unit 602, a generating unit 603, and a transmitting unit 604.

Specifically, the first determining unit 601 is configured to determine, according to the user equipment and the data radio bearer DRB, an air interface resource scheduling data amount of the media access control MAC layer for the downlink data in the current period.

The second determining unit 602 is configured to determine, according to the amount of data scheduled by the MAC layer for the air interface resource of the downlink data in the current period, the buffer amount of air interface data that needs to be requested by the RLC layer of the radio link control in the next period to the upper layer of the user plane RLC.

The generating unit 603 is configured to generate a traffic request message according to the air interface data buffer amount of the next period.

The sending unit 604 is configured to send the flow request message to an upper layer of the user plane RLC; the flow request message is used to instruct the upper layer of the user plane RLC to send downlink data corresponding to the flow request message to the RLC layer.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. 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 as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed 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, a network device, or the like) or a processor (processor) 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.

In order to implement the above embodiments, the present application further provides another downlink data control apparatus for a base station system. It should be noted that the downlink data control apparatus of the base station system according to the embodiment of the present application is applicable to the upper layer of the user plane RLC in the base station system. As shown in fig. 7, the downlink data control apparatus 700 of the base station system may include: a receiving unit 701 and a transmitting unit 702.

Specifically, the receiving unit 701 is configured to receive a traffic request message sent by the RLC layer; the flow request message is generated by the RLC layer according to the user equipment and the data radio bearer DRB, determining an air interface resource scheduling data amount of the MAC layer for downlink data in the current period by using the medium intervention control, determining an air interface data buffer amount required to be requested by the RLC layer to the upper layer of the user plane RLC in the next period according to the air interface resource scheduling data amount of the downlink data in the current period by using the MAC layer, and according to the air interface data buffer amount in the next period.

The sending unit 702 is configured to send corresponding downlink data to the RLC layer based on the traffic request message and the size limit of the single-time-transmission packet.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed 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, a network device, or the like) or a processor (processor) 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: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

In order to implement the foregoing embodiments, the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to enable the processor to execute the downlink data control method of the base station system according to any one of the foregoing embodiments shown in fig. 2 and fig. 3, or to execute the downlink data control method of the base station system according to the foregoing embodiment shown in fig. 4.

It should be noted that the processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, nonvolatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art 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

1. A downlink data control method of a base station system is applied to a Radio Link Control (RLC) layer in the base station system, and the method comprises the following steps:

2. The method according to claim 1, wherein the determining, according to the amount of data scheduled by the MAC layer for the air interface resource of the downlink data in the current period, the buffer amount of air interface data that the radio link control RLC layer of the next period needs to request the upper layer of the user plane RLC specifically includes:

3. The method according to claim 2, wherein the determining, according to the amount of air interface resource data scheduled by the MAC layer for the target DRB in the current period, an air interface data buffer amount that the RLC layer of the next period needs to request an upper RLC layer of a user plane, specifically includes:

determining a transmission mode of an RLC entity of the base station;

4. The method of claim 3, wherein the determining the maximum buffer amount of the RLC layer for buffering data for the target DRB in a unit period according to the amount of the air interface resource data scheduled by the MAC layer for the target DRB in the current period specifically comprises:

5. The method according to claim 3, wherein the determining, according to the maximum buffer amount, the remaining unsent buffer amount, and the transmission mode, an air interface data buffer amount that the next cycle RLC layer needs to request an upper layer of a user plane RLC specifically includes:

6. The method of claim 4, further comprising:

7. A downlink data control method of a base station system is applied to a user plane (RLC) upper layer in the base station system, and the method comprises the following steps:

8. The method of claim 7, further comprising:

9. The method of claim 8, further comprising:

and when the current cached data volume is larger than the maximum caching volume, performing packet loss operation on the target DRB, or notifying the congestion to a service level corresponding to the target DRB.

10. A downlink data control device of a base station system is characterized by comprising a memory, a transceiver and a processor; wherein the content of the first and second substances,

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and executing the downlink data control method of the base station system according to any one of claims 1 to 6.

11. A downlink data control device of a base station system is characterized by comprising a memory, a transceiver and a processor; wherein the content of the first and second substances,

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor configured to read the computer program in the memory and execute the downlink data control method of the base station system according to any one of claims 7 to 9.

12. A downlink data control apparatus of a base station system, applied to a radio link control, RLC, layer in the base station system, the apparatus comprising:

13. A downlink data control device of a base station system is applied to an upper layer of a user plane (RLC) in the base station system, and the device comprises:

and a sending unit, configured to send corresponding downlink data to the RLC layer based on the traffic request message and the size limit of the single-time-transmission packet.

14. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the downlink data control method of the base station system according to any one of claims 1 to 6 or the downlink data control method of the base station system according to any one of claims 7 to 9.