CN108075870B

CN108075870B - Method and device for inter-station carrier aggregation scheduling

Info

Publication number: CN108075870B
Application number: CN201611032461.2A
Authority: CN
Inventors: 徐明宇; 寇会如; 齐丙花; 刘蓉
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-11-16
Filing date: 2016-11-16
Publication date: 2020-11-10
Anticipated expiration: 2036-11-16
Also published as: CN108075870A

Abstract

The invention provides a method and a device for inter-station carrier aggregation scheduling, wherein the method comprises the following steps: the PCell determines the data volume of RLC layer cache regions allocated to the PCell and the SCell by carrier aggregation bearer between stations, and sends the data volume of the RLC layer cache region allocated to the SCell; the PCell determines the data volume of RLC layer request data of the PCell side and the data volume of RLC layer request data of the PCell side; and the PCell allocates data according to the data quantity requested by the PCell side and the SCell side, and forms RLC PDUs (radio link control protocol data units) by the allocated data and respectively sends the RLC PDUs to the MAC layer of the PCell and the MAC layer of the SCell.

Description

Method and device for inter-station carrier aggregation scheduling

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for inter-station carrier aggregation scheduling.

Background

In an LTE (Long Term Evolution) system, a serving cell is a cell that provides data transmission service for UEs (user terminals), and each UE has only one serving cell at most. After the Rel-10 introduces the CA (Carrier Aggregation) technology, the UE may have multiple serving cells simultaneously, that is, the system aggregates two or more available carriers together to form a larger transmission bandwidth, so as to achieve a higher transmission rate and provide better service experience for the user. Thus, the cells serving the UE are divided into two categories: PCell/PCC (Primary Cell/Primary Component Carrier) and SCell/SCC (Secondary Cell/Secondary Component Carrier). Wherein, the PCell inherits the property of the serving cell in the LTE system, and the SCell is only used as an additional resource to carry the function of data transmission. Both PCell and SCell are from the UE perspective. The PCell is a serving cell for establishing RRC connection for the UE, and the establishment process is completely the same as that of the LTE system. The SCell is configured by the RRC layer of the PCell. And the PCell configures the SCell for the UE according to actual requirements, wherein the SCell configuration comprises addition of the SCell, deletion of the SCell and modification of the SCell, and the SCell configuration is completed through an RRC reconfiguration process.

In the existing carrier aggregation scheduling, as long as a UE has an activated SCell, when the UE is scheduled, both the PCell and the activated SCell participate in resource allocation. And the intra-station carrier aggregation, the PCell and the SCell belong to the same base station, and the RLC layer can forward data to the MAC layer of the SCell without time delay without considering the influence of time delay. However, due to carrier aggregation between stations, the PCell and the SCell belong to different base stations, and data interaction is transmitted through an X2 port, so that scheduling cannot be achieved in real time.

The prior art aims at intra-station carrier aggregation, namely, a PCell and an SCell belong to a base station, data and information interaction does not have time delay, and the influence of the time delay is not considered. When carrier waves among stations are aggregated, the PCell and the SCell belong to different base stations respectively, data and information are transmitted through an X2 port, and the influence of time delay needs to be considered. If the carrier aggregation between stations still adopts a scheduling algorithm of carrier aggregation in the stations, real-time scheduling can not be carried out, so that scheduling time sequence is disordered, data and messages can not be issued in time, and the performance of the whole system is influenced. Therefore, the scheduling algorithm for intra-station carrier aggregation is not suitable for inter-station carrier aggregation.

Disclosure of Invention

In view of the foregoing technical problems, embodiments of the present invention provide a method and an apparatus for inter-station carrier aggregation scheduling, which complete carrier aggregation across base stations, so that an inter-station carrier aggregation user is normally scheduled to obtain carrier aggregation gain.

According to an aspect of the embodiments of the present invention, there is provided a method for inter-station carrier aggregation scheduling, including:

the PCell determines the data volume of RLC layer cache regions allocated to the PCell and the SCell by carrier aggregation bearer between stations, and sends the data volume of the RLC layer cache region allocated to the SCell;

the PCell determines the data volume of RLC layer request data of the PCell side and the data volume of RLC layer request data of the PCell side;

and the PCell allocates data according to the data quantity requested by the PCell side and the SCell side, and forms RLC PDUs (radio link control protocol data units) by the allocated data and respectively sends the RLC PDUs to the MAC layer of the PCell and the MAC layer of the SCell.

Optionally, the method further comprises:

and the PCell normally schedules inter-station carrier aggregation bearing and executes an HARQ process.

Optionally, the method further comprises:

the RLC layer of the PCell performs an ARQ process for the AM mode.

Optionally, the sending, to the SCell, the data amount of the RLC layer buffer allocated to the SCell includes:

and the PCell triggers to send the data volume of the RLC layer buffer area allocated to the SCell according to a preset period or a preset event.

Optionally, the data volume of the data requested by the SCell side to the RLC layer of the PCell is the data volume requested by the SCell to the PCell through the X2 port according to the data volume of the RLC layer buffer of the allocated SCell and the scheduling result.

Optionally, the real-time scheduling refers to scheduling of users in the local cell of the SCell and carrier aggregation users between stations simultaneously, and all the users need to advance by N times of X2 time delay, where N is a positive integer.

Optionally, normal scheduling is performed on the intra-station carrier aggregation user with the current cell as the user of the PCell and the current cell as the SCell, and/or scheduling is performed in advance on the inter-station carrier aggregation user with the current cell as the SCell, and resources are reserved in advance for the inter-station carrier aggregation user.

According to another aspect of the embodiments of the present invention, there is also provided a method for inter-station carrier aggregation scheduling, including:

the SCell receives the data volume of an RLC layer cache region allocated by the PCell;

the SCell requests data from an RLC layer of the PCell according to a real-time scheduling result;

and the SCell receives data allocated by the PCell according to the data quantity requested by the PCell side and the SCell side.

Optionally, the SCell requests data from an RLC layer of the PCell according to a real-time scheduling result, including:

and the SCell carries out real-time scheduling according to the data volume of the RLC layer buffer area of the allocated SCell and requests data from the PCell through an X2 port according to the scheduling result.

Optionally, the method further comprises:

the SCell performs a HARQ process.

Optionally, the SCell performs a HARQ process, including:

and initially transmitting the inter-station CA bearer transmitted on the SCell side, wherein the HARQ process of the inter-station CA bearer is executed on the PCell side, and the SCell transmits HARQ related data of the SCell to the PCell side.

Optionally, the SCell performs a HARQ process, including:

and initially transmitting the inter-station CA bearer transmitted on the SCell side, executing the HARQ process on the SCell side, and forwarding the HARQ feedback received from the PUCCH to the SCell by the PCell.

According to a third aspect of the embodiments of the present invention, there is provided an inter-station carrier aggregation scheduling apparatus, applied to a PCell side, including:

the first determining module is used for determining the data volume of the RLC layer buffer areas allocated to the PCell and the SCell by the carrier aggregation bearer between the stations and sending the data volume of the RLC layer buffer area allocated to the SCell;

the second determining module is used for determining the data volume of the RLC layer request data of the PCell side and the data volume of the RLC layer request data of the PCell side;

and the first transmission module is used for distributing data according to the data quantity requested by the PCell side and the SCell side, and forming RLC PDUs by the distributed data and respectively sending the RLC PDUs to the MAC layer of the PCell and the MAC layer of the SCell.

Optionally, the apparatus further comprises:

and the scheduling module is used for scheduling carrier aggregation bearing between stations and executing an HARQ process.

Optionally, the apparatus further comprises:

a first processing module for performing an ARQ process for the AM mode.

Optionally, the second determining module is further configured to:

and triggering to send the data volume of the RLC layer buffer area allocated to the SCell according to a preset period or a preset event.

According to a fourth aspect of the embodiments of the present invention, there is further provided an apparatus for inter-station carrier aggregation scheduling, applied to an SCell side, including:

the first receiving module is used for receiving the data volume of the RLC layer buffer area distributed by the PCell;

the request module is used for requesting data to an RLC layer of the PCell according to a real-time scheduling result;

and a second receiving module, configured to receive data allocated by the PCell according to data amounts requested by the PCell side and the SCell side.

Optionally, the request module is further configured to:

and performing real-time scheduling according to the data volume of the RLC layer buffer area of the allocated SCell, and requesting data to the PCell through an X2 port according to a scheduling result.

Optionally, the apparatus further comprises:

and the second processing module is used for executing the HARQ process.

Optionally, the second processing module is further configured to: and initially transmitting the inter-station CA bearer transmitted at the SCell side, executing the HARQ process at the PCell side, and transmitting the HARQ related data to the PCell side by the SCell.

Optionally, the second processing module is further configured to: and initially transmitting the inter-station CA bearer transmitted on the SCell side, executing the HARQ process on the SCell side, and forwarding the HARQ feedback received from the PUCCH to the SCell by the PCell.

One of the above technical solutions has the following advantages or beneficial effects: in this embodiment, the data volume of the RB in the RLC buffer is allocated to the PCell and the SCell in a certain proportion, the BO data volume allocated to the SCell is transmitted (for example, through an X2 port) to the SCell, the PCell and the SCell apply for data to the RLC of the PCell in real time according to the scheduling conditions of the PCell and the SCell, the RLC real-time allocation data forms an RLC PDU and respectively sends the RLC PDU to the MAC module of the PCell and the MAC module of the SCell according to a request, an inter-station carrier aggregation scheduling process can be formulated through interaction of data and information of an X2 port, carrier aggregation across base stations is completed, so that an inter-station carrier aggregation user is normally scheduled, and carrier aggregation gain is obtained.

Drawings

Fig. 1 is a flowchart illustrating a method for inter-station carrier aggregation scheduling according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a system for inter-station carrier aggregation scheduling according to an embodiment of the present invention;

fig. 3 is a second flowchart of a method for inter-station carrier aggregation scheduling according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for inter-station carrier aggregation scheduling according to a second embodiment of the present invention;

fig. 5 is a flowchart of a method for inter-station carrier aggregation scheduling according to a third embodiment of the present invention;

fig. 6 is a schematic diagram of a scheduling scheme of an SCell side in the third embodiment of the present invention;

fig. 7 is a schematic diagram illustrating transmission effects of a scheduling scheme on the SCell side in the third embodiment of the present invention;

fig. 8 is a schematic diagram of another scheduling scheme of an SCell side in the third embodiment of the present invention;

fig. 9 is a schematic diagram illustrating transmission effects of another scheduling scheme on the SCell side in the third embodiment of the present invention;

fig. 10 is a block diagram of an inter-station carrier aggregation scheduling apparatus according to a fourth embodiment of the present invention;

fig. 11 is a block diagram of an inter-station carrier aggregation scheduling apparatus according to a fifth embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Thus, embodiments of the invention may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.

Example one

Referring to fig. 1, a flow of a method for inter-station carrier aggregation scheduling is shown, and each step in fig. 1 is described in detail below with reference to a system diagram shown in fig. 2, where the specific steps are as follows:

step 101, the PCell determines the data volume of the RLC layer buffer areas distributed to the PCell and the SCell by carrier aggregation bearer between stations, and sends the data volume of the RLC layer buffer area distributed to the SCell;

optionally, the PCell triggers transmission of a data amount of an RLC layer buffer allocated to the SCell according to a preset period or a preset event.

The PCell and the SCell respectively belong to different base stations.

102, the PCell determines the data volume of RLC layer request data of the PCell side and the data volume of RLC layer request data of the PCell side;

optionally, the data amount of the data requested by the SCell side to the RLC layer of the PCell is the data amount requested by the SCell to the PCell through the X2 port according to the data amount of the allocated RLC layer buffer of the SCell in real time. The real-time scheduling refers to scheduling of users in the SCell local area and carrier aggregation users between stations at the same time, and all the users need to advance by N times of X2 time delay, where N is a positive integer, for example, N is equal to 2.

It should be noted that, in this embodiment, optionally, normal scheduling is performed on the intra-station carrier aggregation user with the current cell as the user of the PCell and with the current cell as the SCell, and/or scheduling is performed in advance on the inter-station carrier aggregation user with the current cell as the SCell, and resources are reserved in advance for the inter-station carrier aggregation user.

And 103, the PCell allocates data according to the data quantity requested by the PCell side and the SCell side, and the allocated data form an RLC PDU and are respectively sent to the MAC layer of the PCell and the MAC layer of the SCell.

Optionally, referring to fig. 3, on the basis of the flow shown in fig. 1, after step 103, the method further includes:

and step 104, normally scheduling inter-station carrier aggregation bearing by the PCell, and executing an HARQ process.

Optionally, with continued reference to fig. 3, the method further comprises:

step 105, performing HARQ by the SCell.

It should be noted that, the initial transmission is performed on the inter-station CA bearer transmitted by the SCell side, the HARQ process is performed on the PCell side, and the SCell is required to transmit the HARQ related data to the PCell side.

It should be noted that, initial transmission is performed on an inter-station CA bearer transmitted by the SCell side, the HARQ process is performed on the SCell side, and the PCell forwards the HARQ feedback received from the PUCCH to the SCell, so that the MAC of the SCell can complete the HARQ process.

Optionally, with continued reference to fig. 3, the method further comprises:

step 106, the RLC layer of the PCell performs an ARQ process for the AM mode.

In the embodiment, the data volume of RB in an RLC buffer area is distributed to a PCell and an SCell according to a certain proportion, the BO data volume distributed to the SCell is transmitted to the SCell through X2, the PCell and the SCell apply for data to the RLC of the PCell in real time according to the scheduling conditions of the PCell and the SCell, the RLC real-time distributed data form RLC PDU and are respectively sent to an MAC (media access control) module of the PCell and an MAC module of the Scell according to requests, an inter-station carrier aggregation scheduling process can be worked out through interaction of data and information of an X2 port, carrier aggregation of cross-base stations is completed, so that an inter-station carrier aggregation user can be normally scheduled, and carrier.

Example two

Referring to fig. 4, a flow of a method for inter-station carrier aggregation scheduling is shown, and each step in fig. 4 is described in detail below with reference to a system diagram shown in fig. 2, where the specific steps are as follows:

step 401, SCell receives data volume of RLC layer buffer area allocated by PCell;

optionally, the SCell performs real-time scheduling according to the data amount of the RLC layer buffer of the allocated SCell, and requests the PCell for data through an X2 port according to a scheduling result.

Step 402, the SCell requests data from an RLC layer of the PCell according to a real-time scheduling result;

optionally, the real-time scheduling refers to scheduling of users in the SCell local area and carrier aggregation users between stations simultaneously, and all of the users need to advance by N times of X2 time delay, where N is a positive integer.

And step 403, the SCell receives data allocated by the PCell according to the data amount requested by the PCell side and the SCell side.

In this embodiment, optionally, the SCell performs a HARQ process.

In this embodiment, the initial transmission is carried out by an inter-station CA transmitted on the SCell side, the HARQ process is performed on the PCell side, and the SCell is required to transmit HARQ related data to the PCell side.

In this embodiment, the initial transmission is carried by an inter-station CA transmitted on the SCell side, the HARQ process is performed on the SCell side, and the PCell forwards the HARQ feedback received from the PUCCH to the SCell, so that the MAC of the SCell can complete the HARQ process.

EXAMPLE III

Referring to fig. 5, a flow of a method for inter-station carrier aggregation scheduling is shown, and each step in fig. 5 is described in detail below with reference to a system diagram shown in fig. 2, where the specific steps are as follows:

step 501: the PCell side determines the RLC layer buffer size allocated to the SCell by the inter-station CA bearer and passes this value to the MAC layer of the SCell through X2.

Optionally, the PCell side transmits the RLC layer buffer size allocated to the SCell to the MAC layer of the SCell based on a periodic trigger or an event trigger.

Step 502: SCell carries out real-time scheduling according to the data volume of the buffer area, and requests data to the RLC of the PCell through X2 according to the scheduling result;

step 503: the RLC of the PCell forms PDU according to the size of the data volume requested by the SCell side and transmits the PDU to the SCell through an X2 port;

step 504: normally scheduling inter-station CA bearing by the PCell and executing an HARQ process;

step 505: SCell executes HARQ process;

scheme A, carrying by inter-station CA transmitted on the SCell side for initial transmission, wherein the HARQ process can be executed on the PCell side, and the SCell is required to transmit HARQ related data to the PCell side;

scheme B, carrying between stations CA transmitted on the SCell side in the initial transmission mode, wherein the HARQ process can be executed on the SCell side, and the PCell forwards the HARQ feedback received from the PUCCH to the SCell, so that the MAC of the SCell can complete the HARQ process;

step 506: the RLC module of the PCell performs an ARQ process for the AM mode.

For the above step 502, there are two scheduling schemes on the SCell side, as shown in fig. 6-9 below:

the first scheduling scheme is as follows:

the simultaneous scheduling of the user in the SCell local area and the user of the inter-station CA all needs to advance N times (for example, 2 times) of the delay of X2 ports, and the delay of X2 ports is exemplified by 4 ms.

See fig. 6 for a specific scheduling procedure.

The modification of the scheduling algorithm is uniformly scheduled 2 times earlier than the time delay of the port X2, namely, the scheduling is carried out in the subframe 0, and the PDCCH and the PDSCH are issued in the subframe 7. And if the user of the CA between the stations needs to apply for RLC data from the PCell, the sub-frame 7 can obtain the data.

Scheduling scheme one transmission effect can be seen in fig. 7.

In the scheme, due to the existence of time delay, transmission data of inter-station CA users and non-inter-station CA users (including subsequent new services) in the Scell are deviated from original data, namely, patterns are unchanged, and the data are translated backwards.

And a second scheduling scheme:

and normally scheduling the users by taking the current cell as the PCell and the intra-station CA users by taking the current cell as the SCell, scheduling the users in advance by taking the current cell as the inter-station CA users of the Scell, and reserving resources for the inter-station CA users in advance.

See fig. 8 for a specific scheduling procedure.

In the scheduling algorithm, the users of the CA between the stations are scheduled 2 times of the time delay of an X2 port in advance, namely, the users are scheduled in a subframe 0, and a PDCCH and a PDSCH are issued in a subframe 7; and normally scheduling non-inter-station CA users in the SCell, but not including resources reserved for pre-scheduling inter-station CA users when calculating available resources. The scheme is equivalent to specially considering the users of the CA among the stations, scheduling in advance and reserving resources in advance.

The transmission effect of the second scheduling scheme can be seen in fig. 9.

In the scheme, due to the existence of time delay, after the transmission data of the inter-station CA user in the Scell is deviated from the original data, namely, the pattern is unchanged, and the data is translated backwards. Data transmission of non-inter-station CA users is not affected.

Example four

Referring to fig. 10, an apparatus for inter-station carrier aggregation scheduling is shown, which is applied to a PCell side, and the apparatus 1000 includes:

a first determining module 1001, configured to determine data amount of an RLC layer buffer allocated to a PCell and an SCell by inter-station carrier aggregation bearer, and send the data amount of the RLC layer buffer allocated to the SCell;

a second determining module 1002, configured to determine a data amount of RLC layer request data of the PCell and the SCell;

the first transmission module 1003 is configured to allocate data according to data amounts requested by the PCell side and the SCell side, and form RLC PDUs with the allocated data and send the RLC PDUs to the MAC layers of the PCell and the SCell, respectively.

In this embodiment, optionally, the apparatus further includes:

a first processing module for performing an ARQ process for the AM mode.

In this embodiment, optionally, the second determining module is further configured to:

In this embodiment, optionally, the data amount of the data requested by the SCell side to the RLC layer of the PCell is the data amount requested by the SCell to the PCell through the X2 port according to the data amount of the RLC layer buffer of the allocated SCell and the scheduling result.

In this embodiment, optionally, the real-time scheduling refers to simultaneous scheduling of users in the SCell local area and carrier aggregation users between stations, and all of the users need to advance by N times of X2 time delay, where N is a positive integer.

In this embodiment, optionally, the intra-station carrier aggregation user with the current cell as the user of the PCell and the current cell as the SCell is scheduled normally, and/or the inter-station carrier aggregation user with the current cell as the SCell is scheduled in advance, and resources are reserved in advance for the inter-station carrier aggregation user.

EXAMPLE five

Referring to fig. 11, a device for inter-station carrier aggregation scheduling is shown, which is applied to a Scell side and includes:

a first receiving module 1101, configured to receive a data amount of an RLC layer buffer allocated by a PCell;

a request module 1102, configured to request data from an RLC layer of the PCell according to a real-time scheduling result;

a second receiving module 1103, configured to receive data allocated by the PCell according to data amounts requested by the PCell side and the SCell side.

In this embodiment, optionally, the request module is further configured to:

In this embodiment, optionally, the apparatus further includes:

and the second processing module is used for executing the HARQ process.

In this embodiment, optionally, the second processing module is further configured to: and carrying out initial transmission on inter-station CA transmitted on the SCell side, wherein the HARQ process is executed on the PCell side.

In this embodiment, optionally, the second processing module is further configured to: and initially transmitting the inter-station CA bearer transmitted on the SCell side, executing the HARQ process on the SCell side, and forwarding the HARQ feedback received from the PUCCH to the SCell by the PCell.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

In addition, the terms "system" and "network" are often used interchangeably herein.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. 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.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. 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.

While the preferred embodiments of the present invention have been described, it should be understood that modifications and adaptations to those embodiments may occur to one skilled in the art without departing from the principles of the present invention and are within the scope of the present invention.

Claims

1. A method for inter-station carrier aggregation scheduling is characterized by comprising the following steps:

the PCell allocates data according to the data quantity requested by the PCell side and the SCell side, and the allocated data form an RLC PDU which is respectively sent to an MAC layer of the PCell and an MAC layer of the SCell;

the data volume of the data requested by the SCell side to the RLC layer of the PCell is the data volume requested by the SCell to the PCell through an X2 port according to the data volume of the allocated RLC layer cache region of the SCell in real time;

the real-time scheduling refers to simultaneous scheduling of users in the local cell of the SCell and carrier aggregation users between stations, and all the users need to advance by N times of X2 port time delay, wherein N is a positive integer.

2. The method of claim 1, further comprising:

3. The method of claim 2, further comprising:

the RLC layer of the PCell performs an ARQ process for the AM mode.

4. The method of claim 1, wherein sending the amount of data allocated to the RLC layer buffer of the SCell to the SCell comprises:

5. The method according to claim 4, wherein the intra-station carrier aggregation user with the current cell as the PCell and the current cell as the SCell are scheduled normally, and/or the inter-station carrier aggregation user with the current cell as the SCell is scheduled in advance, and resources are reserved in advance for the inter-station carrier aggregation user.

6. A method for inter-station carrier aggregation scheduling is characterized by comprising the following steps:

the SCell receives data allocated by the PCell according to the data quantity requested by the PCell side and the SCell side;

the real-time scheduling refers to simultaneous scheduling of users in the local cell of the SCell and carrier aggregation users between stations, and all the users need to advance by N times of X2 time delay, wherein N is a positive integer.

7. The method of claim 6, wherein the SCell requesting data from an RLC layer of the PCell according to the real-time scheduling result comprises:

8. The method of claim 7, further comprising:

the SCell performs a HARQ process.

9. The method of claim 8, wherein the SCell performs HARQ processes comprising:

10. The method of claim 8, wherein the SCell performs HARQ processes comprising:

11. The method according to claim 7, wherein the intra-station carrier aggregation user with the current cell as the PCell and the current cell as the SCell are scheduled normally, and/or the inter-station carrier aggregation user with the current cell as the SCell is scheduled in advance, and resources are reserved in advance for the inter-station carrier aggregation user.

12. An apparatus for inter-station carrier aggregation scheduling, applied to a PCell side, includes:

the first transmission module is used for distributing data according to the data quantity requested by the PCell side and the SCell side, and forming RLC PDUs (radio link control protocol data units) by the distributed data and respectively sending the RLC PDUs to the MAC layer of the PCell and the MAC layer of the SCell;

13. The apparatus of claim 12, further comprising:

14. The apparatus of claim 12, further comprising:

a first processing module for performing an ARQ process for the AM mode.

15. The apparatus of claim 12, wherein the second determining module is further configured to:

16. The apparatus of claim 12, wherein the intra-station carrier aggregation user with the current cell as the PCell and the current cell as the SCell is scheduled normally, and/or wherein the inter-station carrier aggregation user with the current cell as the SCell is scheduled in advance, and resources are reserved in advance for the inter-station carrier aggregation user.

17. An apparatus for inter-station carrier aggregation scheduling, applied to an SCell side, includes:

a second receiving module, configured to receive data allocated by the PCell according to data amounts requested by a PCell side and an SCell side;

18. The apparatus of claim 17, wherein the request module is further configured to:

19. The apparatus of claim 17, further comprising:

and the second processing module is used for executing the HARQ process.

20. The apparatus of claim 19, wherein the second processing module is further configured to: and initially transmitting the inter-station CA bearer transmitted at the SCell side, executing the HARQ process at the PCell side, and transmitting the HARQ related data to the PCell side by the SCell.

21. The apparatus of claim 19, wherein the second processing module is further configured to: and initially transmitting the inter-station CA bearer transmitted on the SCell side, executing the HARQ process on the SCell side, and forwarding the HARQ feedback received from the PUCCH to the SCell by the PCell.

22. The apparatus of claim 18, wherein the intra-station carrier aggregation user with the current cell as the PCell and the current cell as the SCell is scheduled normally, and/or wherein the inter-station carrier aggregation user with the current cell as the SCell is scheduled in advance, and resources are reserved in advance for the inter-station carrier aggregation user.