CN112512084A

CN112512084A - Base station and data transmission adjusting method

Info

Publication number: CN112512084A
Application number: CN201910870556.9A
Authority: CN
Inventors: 蒋坤霖; 梁庆丰
Original assignee: Zhonglei Electronics Co ltd
Current assignee: Zhonglei Electronics Co ltd; Sercomm Corp
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2021-03-16

Abstract

The invention provides a base station and a data transmission adjusting method. The method is suitable for the base station, and the user equipment selectively connects the base station and the second base station at the same time. The adjusting method comprises the following steps: the load residual is determined and is the residual capacity for data carrying. And judging the load demand required by the data bearer to be transmitted in the data bearer, wherein the load demand is the capacity required by a plurality of data packets corresponding to the data bearer to be transmitted. The invention determines to split part of the data packets corresponding to the data bearer to be transmitted to the second base station for transmission according to the comparison result of the load residual amount and the load demand amount, and determines the transmission ratio of the data packets split to the base station and the second base station according to the packet loss ratio of the base station and the packet loss ratio of the second base station. Therefore, the power of the user equipment can be saved, the loss of data is reduced, and the data can be effectively converged.

Description

Base station and data transmission adjusting method

Technical Field

The present invention relates to a communication transmission mechanism, and more particularly, to a base station and a method for adjusting data transmission.

Background

In the new generation of 4G/5G mobile communication network, the deployment of large Cell (Macro Cell) and Small Cell (Small Cell) in heterogeneous networks helps telecom operators to improve the Coverage (Coverage) and Capacity (Capacity) of the mobile communication network provided by the telecom operators. In the initial stage of New Radio (NR) research, a 4G/5G Dual Connectivity network architecture in evolved universal terrestrial Radio access-Dual Connectivity (EN-DC) of Non-independent Networking (NSA) was proposed, which is quite suitable for large base stations and small base stations to be deployed in heterogeneous networks. The heterogeneous network is formed by a widely-deployed Long Term Evolution (LTE) large base station and a newly-deployed 5G small base station, the problem of heterogeneous network handoff is solved by a dual-connection network technology, and the transmission speed of the user equipment with high bandwidth transmission requirements can be increased.

Disclosure of Invention

The invention aims at a base station and an adjusting method of data transmission, which dynamically starts split bearing and adjusts the data distribution ratio between two base stations.

According to the embodiment of the invention, the adjustment method of data transmission is suitable for the first base station, and the user equipment is selectively connected with the first base station and the second base station simultaneously. The adjusting method comprises the following steps: and judging the load residual amount which is the residual capacity used for storing the data packet by the data bearer. And judging the load demand required by the data bearer to be transmitted in the data bearer, wherein the load demand is the capacity required by a plurality of data packets corresponding to the data bearer to be transmitted. And according to the comparison result of the load residual amount and the load demand amount, determining to split the part of the data packets corresponding to the data bearer to be transmitted to the second base station for transmission. .

According to an embodiment of the present invention, a base station includes an inter-base station transmission interface and a processor. The UE selectively connects to the base station and the second base station simultaneously. The inter-base station transport interface is configured to communicate with a second base station. The processor is coupled to the inter-base station transmission interface and configured to perform the following steps. And judging the load residual amount which is the residual capacity used for storing the data packet by the data bearer. And judging the load demand required by the data bearer to be transmitted in the data bearer, wherein the load demand is the capacity required by a plurality of data packets corresponding to the data bearer to be transmitted. And according to the comparison result of the load residual amount and the load demand amount, determining to split the part of the data packets corresponding to the data bearer to be transmitted to the second base station through the transmission interface between the base stations for transmission.

Based on the above, the base station and the adjustment method for data transmission in the embodiments of the present invention compare the load residual amount and the load demand amount, and determine to start or stop the data bearer splitting based on the comparison result. Therefore, the user equipment does not need to monitor the data transmission of the two base stations in full time. In addition, during the split bearer proceeding, the data distribution ratio of the split bearer can be dynamically adjusted, so that the merging end does not have the situation that data loss caused by processing packets due to Out-of-Order (Out-of-Order) is not delayed during merging.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

FIG. 2 is a block diagram of the components of a base station in accordance with one embodiment of the present invention;

FIG. 3 is a block diagram of components of another base station in accordance with one embodiment of the present invention;

FIG. 4 is a diagram of a communication system with an EN-DC architecture according to an embodiment of the present invention;

FIG. 5 is a flow chart of a method for adjusting data transmission according to an embodiment of the invention;

FIG. 6 is a state diagram of a base station in accordance with an embodiment of the present invention;

FIG. 7 is a flowchart of a method for adjusting a first state according to an embodiment of the invention;

FIG. 8 is a flowchart of a second state adjustment method according to an embodiment of the invention;

FIG. 9 is a flowchart of a ratio adjustment method according to an embodiment of the invention.

Description of the reference numerals

1: a communication system;

10: a user equipment;

30. 50, MNB, SNB: a base station;

31. 51: an antenna;

32. 52: a receiver;

33. 53: a transmitter;

34. 54: an analog-to-digital/digital-to-analog converter;

35. 55: a memory;

36. 56: a processor;

37. 57: an inter-base station transmission interface;

401. 402, a step of: connecting wires;

S1-MME, X2-C: a control plane link;

S1-U, X2-U: a user plane link;

MME: a mobility management entity;

S-GW: a service gateway;

s510 to S550, S710 to S780, S810 to S880, S910 to S960: a step of;

IS: an initial state;

FS: a first state;

and SS: and a second state.

Detailed Description

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 1 is a schematic diagram of a communication system 1 according to an embodiment of the present invention. Referring to fig. 1, a communication system 1 includes, but is not limited to, one or more user equipments 10,

base stations

30,50, and a core network 70.

The user Equipment 10 may be a Mobile Station, an Advanced Mobile Station (AMS), a telephone device, a Customer Premises Equipment (CPE), or a wireless sensor, among other devices.

The

Base stations

30,50 may be Home Evolved Node bs (henbs), enbs, next generation Node bs (gnbs), Base Transceiver Systems (BTSs), relays (relays), or repeaters (repeaters). It should be noted that the embodiment of the present invention does not limit whether the types of the two

base stations

30,50 or the supported mobile communication standards are the same.

Fig. 2 is a block diagram of the components of a base station 30 in accordance with one embodiment of the present invention. Referring to fig. 2, the base station 30 includes, but is not limited to, one or more antennas 31, a receiver 32, a transmitter 33, an analog-to-digital (a/D)/digital-to-analog (D/a) converter 34, a memory 35, a processor 36, and an inter-base station transmission interface 37.

Receiver 32 and transmitter 33 are used to wirelessly receive uplink (uplink) signals and transmit downlink (downlink) signals, respectively, through antenna 31. Receiver 32 and transmitter 33 may also perform analog signal processing operations such as low noise amplification, impedance matching, mixing, frequency up or down conversion, filtering, amplification, and the like. An analog-to-digital/digital-to-analog converter 34 is coupled to the receiver 32 and the transmitter 33, the analog-to-digital/digital-to-analog converter 34 configured to convert from an analog signal format to a digital signal format during uplink signal processing and from a digital signal format to an analog signal format during downlink signal processing.

The Memory 35 may be any type of fixed or removable Random Access Memory (RAM), Read-Only Memory (ROM), Flash Memory (Flash Memory), or the like, or any combination thereof. The memory 35 records program codes, device configurations, codebooks, buffered or persistent Data, and other various communication Protocol related software modules such as a Radio Resource Control (RRC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Media Access Control (MAC) layer, and a Physical (PHY) layer.

The processor 36 is coupled to the analog-to-digital/digital-to-analog converter 34 and the memory 35, the processor 36 is configured to process the digital signals and execute a program according to an exemplary embodiment of the present invention, and can access or load data and software modules recorded in the memory 35. The functions of the processor 36 may be implemented using Programmable units such as a Central Processing Unit (CPU), a microprocessor, a microcontroller, a Digital Signal Processing (DSP) chip, a Field Programmable Gate Array (FPGA), and the like. The functions of the processor 36 may also be implemented in a stand-alone electronic device or Integrated Circuit (IC), and the operations of the processor 36 may also be implemented in software.

An inter-base station transport interface 37 is coupled to the processor 36, and the inter-base station transport interface 37 may be an Ethernet (Ethernet), fiber optic network, or other transport interface. The inter-base station transmission interface 37 is used to connect to the base station 50 and transmit information to the base station 50 or receive information from the base station 50 (i.e., communicate with another base station 50). For example, the base station 30 communicates information with the base station 50 over an X2 or Xn interface (not through the core network 70). It should be noted that the definition of the interface between the base stations may be different for different generations of mobile communication standards, but the name or type of the interface is not limited in the embodiments of the present invention.

Fig. 3 is a block diagram of components of another base station 50 in accordance with an embodiment of the present invention. Referring to fig. 2 and 3, an embodiment of the base station 50 and its components may refer to the description of the base station 30 (i.e., the antenna 51, the receiver 52, the transmitter 53, the adc 54, the memory 55, the processor 56, and the inter-base station transmission interface 57 correspond to the antenna 31, the receiver 32, the transmitter 33, the adc 34, the memory 35, the processor 36, and the inter-base station transmission interface 37, respectively), which are not repeated herein.

It is noted that, in the present embodiment, the ue 10 and the bss 30 and 50 support Dual Connectivity (DC) function. Base station 30 acts as the primary node and base station 50 acts as the secondary node. The user equipment 10 can selectively connect the base station 30 and the base station 50 at the same time. When the

base stations

30,50 serve the user equipment 10 through the dual connectivity function, control signaling is transferred between the base station 30 and the user equipment 10, and data may be transferred between the base station 30 and the user equipment 10 or between the base station 50 and the user equipment 10.

Devices such as a Home Subscriber Server (HSS), a Mobility Management Entity (MME), a Serving Gateway (S-GW), a Packet Data Network Gateway (PDN GW), an authorization Server Function (AUSF), an Access and Mobility Management Function (AMF), a Session Management Function (SMF), and/or a User Plane Function (UPF) may be present within the core Network 70. It should be noted that the types of devices and functions thereof in the core network 70 may be different according to different generation mobile communication standards, but the embodiment of the present invention is not limited thereto.

It is noted that most operators chose a non-independent Networking (NSA) mode in the early stages of 5G deployment in order to save costs and to quickly launch services. Since the cost of a 5G Core network is high but the maturity of the 5G Core network is not high, a 5G base station in the NSA mode is generally preferred to access a 4G Core network (e.g., Evolved Packet Core (EPC)), so the EN-DC architecture is a preferred choice for 5G initial introduction of Enhanced Mobile Broadband (eMBB) service.

Fig. 4 is a diagram of a communication system with an EN-DC architecture according to an embodiment of the invention. Referring to fig. 4, a connection 401 represents a control Plane (C-Plane) and is used for transmitting control signaling. For example, there is a control plane link S1-MME between the base station MNB (e.g. base station 30) of 4G LTE to the core network (i.e. the network where the mobility management entity MME and the serving gateway S-GW are located). The base station SNB (e.g., base station 50) of the 5G NR has no control plane link wired directly to the core network. There is an X2-C control plane link between base station MNB and base station SNB.

On the other hand, line 402 represents the user Plane (U-Plane) and is used to transfer user data. For example, there is an X2-U user plane link between base station MNB and base station SNB. And a user plane link of S1-U is respectively arranged between the base station MNB and the base station SNB and the core network.

In such a dual connectivity architecture, a user equipment UE (e.g. user equipment 10) has two paths and these two paths reach the core network via base station MNB or base station SNB, respectively. Thus, the path transmission of data includes 3 options: firstly, only the path transmission via the base station MNB is selected; secondly, only the path transmission through the base station SNB is selected; and thirdly, the transmission is carried out through two paths of the base station MNB and the base station SNB at the same time.

Typically, the base station MNB, which is the master node, forms a network of cells in multiple layers using several different center frequencies, which cells can all serve as anchor points for the control plane. Therefore, these 4G cells can be collectively referred to as Master Cell Group (MCG), and the radio data bearer (bearer) established thereon is referred to as MCG bearer (corresponding to the selection of path transmission only via the base station MNB). Accordingly, several 5G cells constitute a Secondary Cell Group (SCG), and the radio data bearer established thereon is called SCG bearer (corresponding to the selection of only selecting a path for transmission via the base station SNB).

As for the selection of two paths for transmission via the base station MNB and the base station SNB at the same time, the MCG and the SCG are required to cooperate, and the packet data is Split into two paths of bearers, so the wireless data Bearer established thereon is called Split Bearer (Split Bearer). The "Split" and "Convergence" of this Split bearer may be handled by the PDCP layer (e.g., responsible for the processors 36, 56). This option is mainly used in case the bearer of the MCG is not sufficient to load the load requirement of the user equipment UE, and may improve the transmission speed of the user equipment.

However, the split bearer technique has the following problems: when the dual connectivity network is applied, the UE needs to start and monitor data transmission and reception of two wireless modules (e.g. corresponding to 4G and 5G networks), which is more power consuming. If the data distribution ratio of the split bearer to the two base stations MNB and SNB at the split end is not proper, there is a possibility of Out-of-order (Out-of-order) when the data packets are merged at the merging end and the data loss caused by the Out-of-order cannot be handled in time.

To solve the foregoing problems, embodiments of the present invention provide (1) a bearer split delivery mechanism is activated, (2) a data allocation ratio of the primary and secondary bss to bearer split is dynamically adjusted, and (3) a bearer split delivery mechanism is deactivated (Deactivation). Thus, the

base stations

30,50 only perform Split (Split) bearer transport mechanism when appropriate, and the ue 10 does not need to start and monitor data transmission and reception of two radio modules all the time. In addition, when the split bearer is required, the

base stations

30 and 50 can dynamically adjust the data distribution ratio so that the merging end does not lose data when merging.

To facilitate understanding of the operation flow of the embodiment of the present invention, the operation flow of the communication system 1 in the embodiment of the present invention will be described in detail below with reference to various embodiments. Hereinafter, the method according to the embodiment of the present invention will be described with reference to each device and its components in the communication system 1. The flow of the method according to the embodiment of the present invention may be adjusted according to the implementation situation, and is not limited thereto. Further, for convenience of explanation, the processor 36 of the base station 30 will be taken as an example and a subject of operation hereinafter. However, some of the operations at the processor 36 may also be performed by the processor 56 of the base station 50 and performed by a receiver that receives information from the core network 70 (related to the delivery of certain data bearer response packets to the user equipment 10).

Fig. 5 is a flowchart of an adjustment method for data transmission according to an embodiment of the invention. Referring to fig. 5, the processor 36 determines the load residual (step S510). In particular, this load residual is the residual capacity that the base station 30 uses to provide one or more data bearers to store its data packets. For example, for each Data bearer, the PDCP layer provides a receive buffer (receiving buffer) for storing PDCP Service Data Units (SDUs) or other types of Data units (used to carry Data packets), and the receive buffer is provided with a predetermined or variable buffer size. And the load residue is for example the difference between the size of the buffer and the size of those data units that have been buffered. The processor 36 updates the size of the buffered data units at any time according to the successfully transmitted data units. The load residual calculation is, for example, based on data volume calculation (data volume calculation) proposed by 3GPP TS 38.323 or other calculation methods.

The processor 36 determines the load demand required for the data bearer to be transmitted in the data bearer (step S530). Specifically, the load requirement is a capacity required by a plurality of data packets corresponding to the data bearer to be transmitted. In response to a transmission request for a pending data bearer from the ue 10, the processor 36 determines that the pending data bearer corresponds to the receiving buffer, and obtains the size of the data packet or the required capacity of the data packet to be transmitted by the pending data bearer through the receiving buffer.

Next, the processor 36 determines to split the portion of the data packets corresponding to the data bearer to be transmitted to the base station 50 for transmission according to the comparison result between the load residual and the load demand (step S550). Specifically, the processor 36 determines whether the load residual is sufficient for the load required for the data bearer to be transmitted. If sufficient, this indicates that the base station 30 has the ability to fully cover the load demand. That is, the load requirement can be met by the selection of the path transmission through only one base station. If not, the base station 30 may seek other base stations to share the load demand. That is, the selection by the aforementioned two path transmission through the two base stations may meet this load demand. The technique for splitting the data packet according to the embodiment of the present invention is, for example, based on a split bearer (split bearer) defined by 3GPP or other techniques for allocating a data packet of a single data bearer to a path of more than two base stations for transmission.

Fig. 6 is a state diagram of a

base station

30,50 according to an embodiment of the invention. Referring to fig. 6, the

base stations

30,50 respectively run the state machines of their split bearer mechanisms. The state machine includes an initial state IS, a first state FS, and a second state SS. The

base stations

30,50 are in an initial state IS after being powered on, and enter a first state FS in response to a data transmission request carried by a certain data to be transmitted. The first state FS pertains to using non-split bearers (i.e., de-activating or disabling the split bearer mechanism) and the second state SS pertains to using split bearers (i.e., activating the split bearer mechanism). Then, the

base stations

30,50 determine whether to maintain the first state FS or switch to the second state SS based on the comparison result of the load residual amount and the load demand amount.

The operation of the two-state FS, SS is described in detail below.

Fig. 7 is a flowchart illustrating a method for adjusting the first state FS according to an embodiment of the invention. Referring to fig. 7, the descriptions of steps S710 and S720 can refer to the descriptions of steps S510 and S530, respectively, and are not repeated herein. Next, the processor 36 determines that the remaining load is greater than the load requirement of the data bearer to be transmitted (step S730). If the comparison result is that the load residual is greater than the load demand, the processor 36 transmits those data packets corresponding to the data bearer to be transmitted by only one of the base station 50 or the base station 30 (possibly based on the attributions of the MCG (corresponding to the base station 30) and the SCG (corresponding to the base station 50)) (step S740, i.e., continues to use the first state FS of the non-split bearer).

On the other hand, if the comparison result is that the loading residual is not greater than the loading requirement, the processor 36 obtains a second loading residual of the base station 50 through the inter-base station transmission interface 37 (step S750). This payload residual is the residual capacity that the base station 50 provides to one or more data bearers to store the data packets. The calculation manner of the second load residual amount may be based on the foregoing description of the load residual amount, and is not described herein again. The second load residual may be conveyed, for example, by a data delivery status (data delivery status) defined by 3GPP TS 36.425 or other information about the capacity of the packet buffer available for the data bearer to be transmitted.

Then, the processor 36 determines whether to split the portion of the data packets corresponding to the data bearer to be transmitted to the base station 50 for transmission according to the remaining sum and the second comparison result of the load demand. The sum of the residuals is the sum of the loading residual of the base station 30 and the second loading residual of the base station 50. The processor 36 may determine whether the sum of the residual amounts is greater than the load demand (step S760). If the second comparison result is that the sum of the residual amounts is greater than the load requirement amount, the processor 36 allows the part of the data packets corresponding to the data bearer to be transmitted to be split to the base station 50 for transmission (step S770, i.e. starting the split bearer and switching to the second state FS). If the second comparison result is that the sum of the residual amounts is not greater than the load demand, the processor 36 sends a control signaling through the transmitter 33, and the control signaling requests the ue 10 to reduce the load demand for loading the data to be transmitted (step S780), and determines whether the updated load demand is sufficient for loading the residual amount (return to step S840). For example, the control signaling is related to changing the type of data payload to be transmitted, or the type of compression encoding of the data packet, etc.

Fig. 8 is a flowchart illustrating a method for adjusting the second status SS according to an embodiment of the present invention. Referring to fig. 8, the descriptions of steps S810 to S830, S850 to S860, and S880 can refer to the descriptions of steps S710 to S730, S750 to S760, and S780, respectively, and are not repeated herein. Unlike the first state FS, if the comparison result is that the load residual is greater than the load requirement, the processor 36 releases the split bearer (step S840, i.e., switches to the first state FS using the non-split bearer). In addition, if the second comparison result is that the sum of the residual amounts is greater than the load demand, the processor 36 continues to split the bearer (step S870, i.e., maintains the second state SS).

Therefore, the present embodiment dynamically switches the state based on the comparison result between the load residual amount and the load demand amount of the base station 30 and/or the base station 50. As long as the residual load of the

single bs

30 or 50 is enough to bear (greater than) the load demand, the ue 10 only needs to perform data transmission operation through the single communication module, thereby saving power.

It should be noted that in other embodiments, the processor 36 may also directly initiate the split bearer mechanism in response to the comparison result indicating that the load residue is not greater than the load requirement, and the second load residue is not considered.

In addition, in the second state SS, the embodiment of the present invention can dynamically adjust the data distribution ratio of the two

base stations

30 and 50 corresponding to the bearer split. FIG. 9 is a flowchart of a ratio adjustment method according to an embodiment of the invention. Referring to fig. 9, if the processor 36 determines to split the portion of the data packets corresponding to the data bearer to be transmitted to the base station 50 for transmission (i.e., to continue or switch to the second state SS), the processor 36 may obtain the loss ratio of the data packets corresponding to the data bearer to be transmitted by the base station 50 through the inter-base station transmission interface 37. For example, the data delivery status message defined by 3GPP TS 36.425 records relevant information about successfully and/or unsuccessfully delivered data units, and the processor 36 can calculate the loss amount ratio (the sum of unsuccessfully delivered data units divided by the amount of data packets allocated to this base station 50) of another base station 50 transmitting data packets of this data bearer to be transmitted based on this information. If this loss amount ratio is less than the ratio threshold (e.g., 10, 25, or 40%), it indicates that the chance of successful transmission by another base station 50 is high, and the processor 36 may increase the data distribution ratio allocated to the base station 50 (step S930) (the data distribution ratio allocated to the base station 30 may be correspondingly decreased). This data allocation ratio is related to the ratio of packets split to another base station 50 to those packets. The processor 36 may increase the data distribution ratio by a particular value or dynamically change the increased value based on other parameters (e.g., loss ratio, or channel quality, etc.). On the other hand, if the loss amount ratio is not less than the ratio threshold, it indicates that the chance of successful transmission by another base station 50 is low, and the processor 36 may decrease the data distribution ratio of the base station 50 (the data distribution ratio allocated to the base station 30 may be correspondingly increased). Similarly, the processor 36 may also decrease the data distribution ratio by a particular value or dynamically change the decreased value based on other parameters (e.g., loss ratio, or channel quality, etc.).

In addition, if the data distribution ratio is decreased, the processor 36 further determines whether the data distribution ratio is less than a lower ratio limit (e.g., 10, 5, or 3%) (step S950). If the data distribution ratio is smaller than the lower ratio limit, it indicates that there is a higher chance of transmission failure through another base station 50, and the processor 36 transmits the data packets corresponding to the data bearer to be transmitted only by the base station 30, and accordingly releases the split bearer mechanism (step S960, i.e., switches to the first state FS). On the other hand, if the data distribution ratio is not less than the lower ratio limit, the processor 36 continues to update the loss amount ratio (return to step S910).

Therefore, in the embodiment of the present invention, the data distribution ratio of the two base stations is dynamically switched and adjusted based on the lost amount of the data transmitted by the other base station. As long as the loss amount ratio of the other base station 50 is high, the data distribution ratio corresponding to the base station 30 is increased, thereby increasing the chance of successful data packet transmission.

It should be noted that in other embodiments, the processor 36 may increase the data distribution ratio corresponding to another base station 50 in response to the loss amount ratio being too high (compared to the ratio threshold). Alternatively, the processor 36 adjusts the data allocation rate based on the channel quality reported by the ue 10, the signal strength, and other conditions, and increases the probability of successful transmission compared to the data allocation rate corresponding to the higher path.

In summary, the base station and the method for adjusting Data transmission according to the embodiments of the present invention consider Data transmission load (i.e., load demand) of the ue, Data transmission load (i.e., load residual) of the base station, and channel quality (related to loss ratio) of the two base stations, and dynamically activate or deactivate the split bearer mechanism and adjust the Data distribution ratio of the split bearer according to the Data transmission load (i.e., load residual). Therefore, the user equipment does not need to monitor the data receiving and sending of the two base stations at the same time in full time, and the convergent end can converge the data.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adjusting data transmission, adapted to a first base station, and a UE selectively connects to the first base station and a second base station simultaneously, the method comprising:

judging a load residual amount, wherein the load residual amount is a residual amount used for storing at least one data packet by at least one data bearer;

judging the load demand required by a data bearer to be transmitted in the at least one data bearer, wherein the load demand is the capacity required by a plurality of data packets corresponding to the data bearer to be transmitted; and

and according to the comparison result of the load residual amount and the load demand amount, determining to split the part of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission.

2. The method of claim 1, wherein the step of determining, according to the comparison result, to split the portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission comprises:

splitting a part of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission in response to the comparison result that the load residual is not greater than the load demand; and

and in response to the comparison result that the load residual amount is greater than the load demand amount, transmitting the data packet corresponding to the data bearer to be transmitted by only one of the second base station or the first base station.

3. The method of claim 1, wherein the step of determining, according to the comparison result, to split the portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission comprises:

obtaining a second loading residual of the second base station in response to the comparison result indicating that the loading residual is not greater than the loading requirement, wherein the loading residual is a residual capacity of the second base station for the at least one data bearer to store the at least one data packet; and

and determining to split a part of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission according to a sum of residuals and a second comparison result of the load demand, wherein the sum of residuals is a sum of the load residual and the second load residual.

4. The method according to claim 3, wherein the step of determining, according to the second comparison result, to split the portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission comprises:

requesting a reduction in the load demand in response to the second comparison result being that the sum of the residual amounts is not greater than the load demand; and

and in response to the second comparison result that the sum of the residual amounts is greater than the load demand amount, allowing the part of the data packet corresponding to the data bearer to be transmitted to be split to the second base station for transmission.

5. The method of claim 1, wherein the step of determining, according to the comparison result, to split the portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission comprises:

in response to determining to split a portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission, obtaining a loss amount ratio of the data packet corresponding to the data bearer to be transmitted by the second base station;

in response to the loss amount ratio being less than a ratio threshold, increasing a data distribution ratio of the second base station, wherein the data distribution ratio is related to a ratio of data packets split to the second base station to the data packets; and

reducing the data distribution ratio of the second base station in reaction to the loss amount ratio not being less than the ratio threshold.

6. The method of claim 1, wherein the step of reducing the data allocation rate of the second base station comprises:

and in response to that the data distribution ratio is smaller than the lower ratio limit, transmitting the data packet corresponding to the data bearer to be transmitted only by the first base station.

7. A base station wherein a user equipment selectively connects to the base station and a second base station simultaneously, the base station comprising:

an inter-base station transmission interface for communicating with the second base station; and

a processor coupled to the inter-base station transmission interface and configured to perform:

and according to the comparison result of the load residual amount and the load demand amount, determining to split the part of the data packet corresponding to the data bearer to be transmitted to the second base station through the transmission interface between the base stations for transmission.

8. The base station of claim 7, wherein the processor is configured to perform:

in response to the comparison result that the load residual is not greater than the load demand, splitting a part of the data packet corresponding to the data bearer to be transmitted to the second base station through the inter-base station transmission interface for transmission; and

and in response to the comparison result that the load residual amount is greater than the load demand amount, transmitting the data packet corresponding to the data bearer to be transmitted only by one of the second base station or the base station.

9. The base station of claim 7, wherein the processor is configured to perform:

obtaining a second loading residual of the second base station through the inter-base station transmission interface in response to the comparison result indicating that the loading residual is not greater than the loading requirement, wherein the loading residual is a residual capacity used by the second base station for the at least one data bearer to store the at least one data packet; and

and according to the sum of the residual amount and the second comparison result of the load demand, determining to split the part of the data packet corresponding to the data bearer to be transmitted to the second base station through the inter-base station transmission interface for transmission, wherein the sum of the residual amount is the sum of the load residual amount and the second load residual amount.

10. The base station of claim 9, wherein the processor is configured to perform:

and in response to the second comparison result indicating that the sum of the residual amounts is greater than the load demand amount, allowing the part of the data packet corresponding to the data bearer to be transmitted to be split to the second base station through the inter-base station transmission interface for transmission.

11. The base station of claim 7, wherein the processor is configured to perform:

in response to determining to split a portion of the data packet corresponding to the data bearer to be transmitted to the second base station for transmission, obtaining, by the inter-base station transmission interface, a loss amount ratio of the data packet corresponding to the data bearer to be transmitted by the second base station;

12. The base station of claim 7, wherein the processor is configured to perform:

and in response to the data distribution ratio being smaller than the lower ratio limit, transmitting the data packet corresponding to the data bearer to be transmitted only by the base station.