CN109348510B

CN109348510B - Load balancing method, device and base station

Info

Publication number: CN109348510B
Application number: CN201811211027.XA
Authority: CN
Inventors: 吕婷; 冯毅; 曹亘; 张涛; 李轶群
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2018-10-17
Filing date: 2018-10-17
Publication date: 2021-11-19
Anticipated expiration: 2038-10-17
Also published as: CN109348510A

Abstract

The embodiment of the invention discloses a load balancing method, a load balancing device and a base station, relates to the technical field of communication, and is used for solving the technical problem that the uplink transmission performance of a 5G base station is reduced due to overhigh load of an UL uplink or an SUL uplink of the 5G base station in the prior art. The method comprises the following steps: after determining that the utilization rate of the first uplink resource is higher than a preset first threshold, the first base station determines a first target UE and allocates a second uplink transmission resource for the first target UE, and sends a first indication message to the first target UE so that the first target UE switches the uplink of the first target UE to the second uplink; after determining that the utilization rate of the second uplink resource is higher than a preset second threshold, the first base station sends a second indication message to the second base station; and the second base station responds to the second indication message, determines a second target UE and a third base station, and sends a switching indication message to the second target UE so that the second target UE is accessed to the third base station according to the switching indication message. The invention is used for improving the uplink transmission performance of the 5G base station.

Description

Load balancing method, device and base station

Technical Field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a load balancing method, apparatus, and base station.

Background

In a mobile communication system, in order to expand the Uplink coverage of a 5G base station to overcome the defect of insufficient Uplink coverage of the 5G base station, a supplemental Uplink SUL (SUL) is further configured for the 5G base station on the basis of configuring an original Uplink UL (UL) for the 5G base station. Since the frequency of the SUL is lower than the UL frequency, the coverage of the SUL is larger than that of the UL. When the UE is located in the coverage of the UL, the UE accesses the UL to transmit uplink data to the 5G base station; when the UE leaves the coverage of the UL, if the UE is still located within the coverage of the SUL, the UE may still transmit uplink data to the 5G base station by accessing the SUL, thereby effectively expanding the uplink coverage of the 5G base station.

In practical situations, since the location distribution of the UE has high randomness, the situation that the UE distribution is uneven easily occurs in the uplink coverage area of the 5G base station, and thus, the UL will be centrally accessed by most UEs or the SUL will be centrally accessed by most UEs, so that the UL or SUL is overloaded and has insufficient transmission resources, or the UL and SUL are unbalanced in load, and the uplink transmission performance of the 5G base station is reduced.

Disclosure of Invention

Embodiments of the present invention provide a load balancing method, an apparatus, and a base station, which are used to solve the technical problem in the prior art that an uplink transmission performance of a 5G base station is reduced due to an excessively high UL uplink or SUL uplink load of the 5G base station.

In a first aspect, a load balancing method is provided, including:

the first base station acquires the utilization rate of the first uplink transmission resource of a first uplink and judges whether the utilization rate of the first uplink transmission resource is higher than a preset first threshold or not;

if the judgment result is yes, the first base station determines first target UE in the UE accessed to the first uplink according to a first preset condition;

the first base station allocates a second uplink transmission resource for the first target UE; wherein the frequency of the second uplink is less than the frequency of the first uplink;

the first base station sends a first indication message carrying the frequency of a second uplink and transmission resources of the second uplink to the first target UE, so that the first target UE switches the first uplink accessed by the first target UE into the second uplink according to the frequency of the second uplink and transmits data by using the transmission resources of the second uplink;

the first base station acquires the utilization rate of the second uplink transmission resource of the second uplink and judges whether the utilization rate of the second uplink transmission resource is higher than a preset second threshold or not;

if the judgment result is yes, the first base station sends a second indication message carrying the load balancing request to the second base station; the second base station sharing the second uplink with the first base station;

the second base station responds to the load balancing request, determines second target UE in the UE accessed to the second base station according to a second preset condition, and determines a third base station;

the second base station sends a resource allocation request message to the third base station, so that the third base station allocates uplink transmission resources of the third base station to the second target UE according to the resource allocation request message;

the second base station receives a resource allocation request feedback message sent by the third base station; the resource allocation request feedback message carries a third base station uplink transmission resource allocated by the third base station for the second target UE;

and the second base station sends a switching indication message carrying the uplink transmission resource of the third base station and the identifier of the third base station to the second target UE, so that the second target UE can access the third base station according to the identifier of the third base station and use the uplink transmission resource of the third base station to transmit data.

Therefore, in the load balancing method provided by the invention, the first base station supports the first uplink and the second uplink to transmit the uplink information at the same time. When the first base station determines that the utilization rate of the first uplink transmission resource is higher than a preset first threshold, and at this time, it can be determined that the load of the first uplink is too high, a first target UE is determined in the UEs accessing the first uplink, and a first indication message carrying the frequency of the second uplink and the second uplink transmission resource is sent to the first target UE, so that the first target UE accesses to switch the first uplink accessed by the first target UE to the second uplink, and uses the second uplink transmission resource to transmit data, thereby reducing the load of the first uplink, improving the uplink transmission performance of the first base station, and improving the resource utilization rate of the second uplink; when the first base station determines that the utilization rate of the second uplink transmission resource is higher than a preset second threshold, the first base station sends a second indication message carrying a load balancing request to the second base station, the second base station responds to the load balancing request and determines a second target UE in the UEs accessing the second base station, and determines a third base station, the second base station sends a resource allocation request message to the third base station, the third base station allocates the uplink transmission resource of the third base station to the second target UE according to the resource allocation request message, and sends a third base station uplink transmission resource carrying the third base station and allocated to the second target UE to the second base station, so that the second base station sends a switching indication message carrying the third base station uplink transmission resource and a third base station identifier to the second target UE, the second target UE accesses the third base station according to the third base station identifier and uses the third base station uplink transmission resource to transmit data, therefore, the UE accessed to the second base station in the second uplink is switched from the second base station to the third base station, the load of the second uplink is reduced under the condition of not influencing the uplink data transmission process of the first base station, and the uplink transmission performance of the first base station is effectively improved.

Optionally, the obtaining, by the first base station, a first uplink transmission resource utilization rate of the first uplink includes:

the method comprises the steps that a first base station obtains the number of first Physical Resource Blocks (PRBs) occupying a first uplink and the total number of the PRBs in the first uplink;

and the first base station takes the ratio of the number of first Physical Resource Blocks (PRBs) occupying the first uplink by the first base station to the total number of the PRBs in the first uplink as the utilization rate of the transmission resources of the first uplink.

Optionally, the obtaining, by the first base station, a second uplink transmission resource utilization rate of a second uplink includes:

the first base station acquires the utilization rate of a first transmission resource of a second uplink occupied by the first base station;

a first base station sends a first request message carrying a resource utilization rate request indication to a second base station;

the first base station receives a first feedback message which is sent to the first base station by the second base station and carries the utilization rate of a second transmission resource of a second uplink occupied by the second base station;

the first base station calculates a second uplink transmission resource utilization rate according to the first transmission resource utilization rate and the second transmission resource utilization rate.

Optionally, the determining, by the first base station, the first target UE in the UE accessing the first uplink according to the first preset condition includes:

a first base station acquires a Reference Signal Received Power (RSRP) measured value of a serving cell sent by UE;

the first base station judges whether the RSRP measurement value of the serving cell is less than or equal to a first preset threshold value;

and if so, determining the UE as the first target UE.

Optionally, the allocating, by the first base station, a second uplink transmission resource of a second uplink to the first target UE specifically is:

second uplink transmission resources are allocated for the first target UE from the second uplink unused PRB resources.

Optionally, the determining, by the second base station, a second target UE among UEs accessing the second base station according to a second preset condition in response to the load balancing request, and determining a third base station includes:

the second base station acquires a service cell RSRP measurement value and a neighbor cell RSRP measurement value sent by UE accessed to the second base station;

calculating a difference value between a service cell RSRP measurement value and a neighbor cell RSRP measurement value;

judging whether the difference value is smaller than or equal to a second preset threshold value;

and if so, determining that the UE is the second target UE, and the base station corresponding to the neighbor cell RSRP measurement value is the third base station.

In a second aspect, a load balancing apparatus is provided, which is applied to a first base station or a chip of the first base station, and includes:

a first obtaining module, configured to obtain a first uplink transmission resource utilization rate of a first uplink;

a first judging module, configured to judge whether a first uplink transmission resource utilization rate is higher than a preset first threshold;

a determining module, configured to determine, if the determination result of the first determining module is yes, a first target UE in the UE accessing the first uplink according to a first preset condition;

an allocation module, configured to allocate a second uplink transmission resource to the first target UE; wherein the frequency of the second uplink is less than the frequency of the first uplink;

a sending module, configured to send a first indication message carrying a frequency of a second uplink and a second uplink transmission resource to a first target UE, so that the first target UE switches a first uplink to which the first target UE accesses to the second uplink according to the frequency of the second uplink, and transmits data using the second uplink transmission resource;

a second obtaining module, configured to obtain a second uplink transmission resource utilization rate of a second uplink;

a second judging module, configured to judge whether a second uplink transmission resource utilization rate is higher than a preset second threshold;

the sending module is further configured to send, when the determination result of the second determining module is yes, a second indication message carrying a load balancing request to the second base station, so that the second base station determines a second target UE among UEs accessing the second base station according to the load balancing request, determines a third base station, and sends a resource allocation request message to the third base station, and receives a resource allocation request feedback message sent by the third base station and carrying a third base station uplink transmission resource allocated by the third base station to the second target UE, so as to send, to the second target UE, a handover indication message carrying a third base station uplink transmission resource and a third base station identifier according to the third base station uplink transmission resource, so that the second target UE accesses the third base station according to the third base station identifier, and uses the third base station uplink transmission resource to transmit data by the second target UE.

Optionally, the first obtaining module is specifically configured to:

acquiring the number of first Physical Resource Blocks (PRBs) occupying a first uplink by a first base station and the total number of PRBs in the first uplink;

and acquiring the ratio of the number of the first physical resource blocks PRB to the total number of PRBs in the first uplink as the utilization rate of the transmission resources of the first uplink.

Optionally, the second obtaining module is specifically configured to:

acquiring the utilization rate of a first transmission resource of a second uplink occupied by a first base station;

sending a first request message carrying a resource utilization rate request indication to a second base station;

receiving a first feedback message which is sent by a second base station and carries the utilization rate of a second transmission resource of a second uplink occupied by the second base station;

and calculating the utilization rate of the second uplink transmission resource according to the utilization rate of the first transmission resource and the utilization rate of the second transmission resource.

Optionally, the determining module is specifically configured to:

acquiring a Reference Signal Received Power (RSRP) measured value of a serving cell sent by UE;

judging whether the RSRP measurement value of the serving cell is less than or equal to a first preset threshold value or not;

and if so, determining the UE as the first target UE.

Optionally, the allocation module is specifically configured to:

In a third aspect, a load balancing apparatus is provided, which is applied to a second base station or a chip of the second base station, and includes:

a receiving module, configured to receive a second indication message carrying a load balancing request sent by a first base station; after the first base station switches the first target UE from the first uplink to the second uplink, if the utilization rate of the transmission resource of the second uplink is determined to be higher than a preset second threshold, a second indication message is generated;

the determining module is used for responding to the load balancing request, determining a second target UE in the UE accessed to the second base station according to a second preset condition, and determining a third base station;

a sending module, configured to send a resource allocation request message to the third base station according to the determination result of the determining module, so that the third base station allocates uplink transmission resources of the third base station to the second target UE according to the resource allocation request message;

the receiving module is further configured to: after the sending module sends the resource allocation request message, receiving a resource allocation request feedback message sent by a third base station; the resource allocation request feedback message carries a third base station uplink transmission resource allocated by the third base station for the second target UE;

the sending module is further configured to: after the receiving module receives the resource allocation request feedback message, a switching indication message carrying the third base station uplink transmission resource and the third base station identifier is sent to the second target UE, so that the second target UE can access the third base station according to the third base station identifier and use the third base station uplink transmission resource to transmit data.

Optionally, the determining module is specifically configured to:

acquiring a service cell RSRP measurement value and a neighbor cell RSRP measurement value sent by UE accessed to the second base station;

In a fourth aspect, a load balancing apparatus is provided, including: one or more processors; the processor is configured to execute computer program code in the memory, the computer program code comprising instructions for the load balancing apparatus to perform the load balancing method performed by the first base station or the second base station in any of the above.

In a fifth aspect, a base station is provided, which includes any one of the load balancing apparatuses described above.

In a sixth aspect, there is provided a storage medium comprising: the storage medium stores instruction codes for performing the load balancing method as described above.

In a seventh aspect, a computer product is provided, comprising: the computer program product comprises instruction code for performing the load balancing method described above.

It can be understood that the load balancing apparatus, the base station, the storage medium, and the computer product provided above are used to execute the method according to the first aspect provided above, and therefore, the beneficial effects that can be achieved by the load balancing apparatus refer to the method according to the first aspect and the beneficial effects of the solutions in the following detailed description, which are not described herein again.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and the drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention.

Fig. 1 is a schematic view of coverage areas of UL and SUL on a 5G base station;

FIG. 2 is a flow chart of a method of load balancing according to the present invention;

fig. 3 is a flowchart of a method for obtaining a utilization rate of a second uplink transmission resource in a load balancing method according to the present invention;

fig. 4 is a schematic diagram of an overlapping coverage area of a second base station and a third base station in a load balancing method according to the present invention;

fig. 5 is a flowchart of a method for determining a second target UE and a third base station in a load balancing method according to the present invention;

fig. 6 is a functional structure block diagram of a load balancing apparatus provided in the present invention;

fig. 7 is a functional structure block diagram of a load balancing apparatus provided in the present invention;

fig. 8 is a functional structure block diagram of a load balancing apparatus provided in the present invention;

fig. 9 is a functional structure block diagram of a load balancing apparatus provided in the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The use of the terms first, second, etc. do not denote any order, and the terms first, second, etc. may be interpreted as names of the objects described. In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Currently, the 5G base station supports two uplinks of UL and SUL simultaneously to transmit uplink data. The SUL supports transmission of uplink data to the 5G base station, and also supports transmission of uplink data to the 3G base station and the 4G base station. The frequency of the SUL is lower than the UL frequency, so the coverage of the SUL is larger than that of the UL. As shown in fig. 1, for convenience of description, a corresponding region in the coverage of the UL is referred to as a near point coverage region (corresponding to a shaded region in fig. 1), and a corresponding region in the coverage of the SUL other than the UL is referred to as a far point coverage region (corresponding to an empty region in fig. 1). When the UE is located in the near point coverage area, the UE accesses the UL to transmit uplink data to the 5G base station; when the UE is located in the far-point coverage area, the UE accesses the SUL to transmit uplink data to the 5G base station. However, in practical situations, since the location distribution of the UEs has high randomness, it is easy for the 5G base station to have uneven distribution of UEs within the uplink coverage area, for example, the UEs are distributed in a close-point coverage area or the UEs are distributed in a far-point coverage area, thereby causing the following problems: firstly, when the UEs are intensively distributed in the near-point coverage area, the number of UEs accessing the UL is large, and the situations of too high load and insufficient transmission resources are likely to occur on the UL, which results in the reduction of the uplink transmission performance of the 5G base station; secondly, when the UEs are distributed in the near-point coverage area in a centralized manner, the number of UEs in the far-point coverage area is relatively small, the number of UEs accessing the SUL is also relatively small, and the load on the SUL is small, so that the situation of unbalanced load occurs on the UL and the SUL at this time, on one hand, the transmission resources with too high load on the UL are insufficient, and on the other hand, the transmission resources available on the SUL are relatively large but cannot be effectively utilized, so that the situation of resource waste occurs on the uplink of the 5G base station; in addition, when the UEs are intensively distributed in the far-point coverage area, the number of UEs accessing the SUL is large, and the conditions of too high load and insufficient transmission resources are likely to occur on the SUL, which results in the reduction of the uplink transmission performance of the 5G base station.

In order to solve the above problem, the present invention provides a load balancing method, as shown in fig. 2, the method includes the following steps:

step S201: the first base station obtains a first uplink transmission resource utilization rate of a first uplink.

The first base station may specifically be a base station supporting simultaneous configuration of an uplink UL and an SUL, for example, a 5G (5-Generation mobile communication technology, fifth Generation mobile communication technology, abbreviated as 5G) base station for providing 5G services; alternatively, the first base station may also be another TDD (Time Division duplex) system supporting simultaneous configuration of the uplink UL and the SUL, or another FDD (Frequency Division duplex) system supporting simultaneous configuration of the uplink UL and the SUL. If the first base station is a TDD system, the first uplink is an uplink with the same frequency as the downlink in the TDD system; if the first base station is an FDD system, the first uplink is an uplink of an uplink frequency that is symmetric to the downlink frequency in the FDD system.

The first uplink transmission resource utilization may be: a ratio of occupied transmission resources in the first uplink to total transmission resources in the first uplink.

The transmission resource in the first uplink may be a transmission resource used for transmitting a signal transmitted by the UE, such as a time domain resource or a frequency domain resource in the first uplink, and in a specific implementation, it is preferable to use a Physical Resource Block (PRB) in the first uplink as the transmission resource of the first uplink.

The obtaining, by the first base station, the first uplink transmission resource utilization rate of the first uplink may specifically be: the method comprises the steps that a first base station obtains the number of first Physical Resource Blocks (PRBs) occupying a first uplink and the total number of the PRBs in the first uplink; and the first base station takes the ratio of the number of first Physical Resource Blocks (PRBs) occupying the first uplink by the first base station to the total number of the PRBs in the first uplink as the utilization rate of the transmission resources of the first uplink.

In a specific implementation, the first base station may obtain the first uplink transmission resource utilization rate of the first uplink through the following formula:

Pul＝N1/N；

wherein Pul is the utilization rate of the transmission resource of the first uplink; n1 is the number of first Physical Resource Blocks (PRBs) of a first uplink occupied by a first base station; n is the total number of PRBs in the first uplink.

Of course, it is understood that the above-listed manner for the first base station to obtain the first uplink transmission resource utilization rate of the first uplink is only an example, and in a specific implementation, the manner for the first base station to obtain the first uplink transmission resource utilization rate of the first uplink may also be other than the above-listed manner, as long as the ratio of the transmission resource occupied in the first uplink to all transmission resources in the first uplink can be obtained.

Step S202: the first base station determines whether the first uplink transmission resource utilization rate is higher than a preset first threshold, and if the first uplink transmission resource utilization rate is higher than the preset first threshold, the step S203 is executed; if the determination result is negative, step S201 is executed again.

The preset first threshold may be set by a person skilled in the art according to practical situations, and the present invention is not limited to this.

Step S203: the first base station determines a first target UE in the UE accessing the first uplink according to a first preset condition.

The first preset condition may be: the RSRP measurement value reported by the UE to the first base station is less than or equal to a first preset threshold value.

In particular, the RSRP of the serving cell of the UE can reflect the distance between the UE and the base station. The smaller the RSRP of the serving cell of the UE, the farther the UE is from the base station, and at this time, accessing the second uplink (see the corresponding description for the second uplink later) may obtain a larger uplink signal received power; therefore, the first target UE is accessed to the second uplink, so that higher uplink received signal power can be obtained, and the uplink transmission performance of the UE is improved; the first preset threshold may be set by a person skilled in the art according to practical situations, and the present invention is not limited thereto. In a specific implementation, the first preset threshold may preferably be-100 (units: dBm).

In a specific implementation, the first base station may first determine a UE accessing the first base station, obtain a serving cell reference signal received power RSRP measurement value sent by the UE, then determine whether the serving cell RSRP measurement value is less than or equal to a first preset threshold, and if the determination result is yes, determine that the UE is a first target UE; if the judgment result is negative, the UE is judged not to be the first target UE.

Step S204: the first base station allocates a second uplink transmission resource for the first target UE.

The frequency of the second uplink is less than that of the first uplink, and the second uplink can simultaneously support the first base station and the second base station to transmit uplink data, that is: the transmission resources of the second uplink may be shared between the first base station and the second base station. In particular implementations, the second uplink may be a SUL.

Similar to the transmission resource of the first uplink, the transmission resource of the second uplink may be a transmission resource used for transmitting a UE transmission signal, such as a time domain resource or a frequency domain resource in the second uplink. In a specific implementation, preferably, PRB (physical resource block) in the second uplink is used as the transmission resource of the second uplink, and the allocating, by the first base station, the second uplink transmission resource for the first target UE may specifically be: the first base station allocates a second uplink transmission resource for the first target UE from the second uplink unused PRB resources. In a specific implementation, the unused PRB resources are all PRB resources in the second uplink except for the used PRB resources, where the used PRB resources include the PRB resources occupied by the UE accessing the first base station and using the second uplink and the PRB resources occupied by the UE accessing the second base station and using the second uplink.

It is to be understood that the allocation manner for allocating the second uplink transmission resource to the first target UE may be set by those skilled in the art according to practical situations, and the present invention is not limited thereto.

Step S205: and the first base station sends a first indication message carrying the frequency of the second uplink and the transmission resource of the second uplink to the first target UE, so that the first target UE switches the uplink of the first target UE into the second uplink according to the frequency of the second uplink and transmits data by using the transmission resource of the second uplink.

Specifically, the first indication message may carry: the second uplink frequency and the second uplink transmission resource (the second uplink transmission resource allocated to the first target UE in step S204) are used for the first target UE to switch the first uplink currently accessed by the first target UE to the second uplink according to the second uplink frequency in the first indication message, and to transmit data using the corresponding second uplink transmission resource in the second uplink according to the second uplink transmission resource in the first indication message.

In addition, the first indication message may also carry an identifier of the first target UE, so that after receiving the first indication message, the first target UE verifies the first indication message according to the identifier of the first target UE carried in the first indication message, so as to determine that the first indication message is an indication message for the first target UE. If the verification is successful, executing the step; otherwise, the step is not executed. In a specific implementation, the first indication message may be a Radio Resource Control (RRC) message.

Therefore, through steps S201 to S205, the load of the first uplink can be reduced, the uplink transmission performance of the first base station can be improved, and the resource utilization rate of the second uplink can be improved.

Step S206: the first base station obtains a second uplink transmission resource utilization rate of a second uplink.

Specifically, the second uplink transmission resource utilization may be: a ratio of occupied transmission resources in the second uplink to the total transmission resources of the second uplink.

In a specific implementation, there may be multiple manners of obtaining the utilization rate of the second uplink transmission resource, and preferably, if a Physical Resource Block (PRB) in the second uplink is used as the transmission resource of the second uplink, an execution process of this step may be shown in fig. 3, and includes:

step S301: the first base station acquires the utilization rate of the first transmission resource of the second uplink occupied by the first base station.

The first base station may first obtain the number of PRBs occupied by the first base station in the second uplink transmission and the total number of PRBs in the second uplink, then obtain a ratio of the number of PRBs occupied by the first base station in the second uplink transmission to the total number of PRBs in the second uplink, and use the ratio as the first transmission resource utilization rate.

In a specific implementation, the first base station may calculate the first transmission resource utilization by using the following formula:

ρ1＝P1/P；

wherein ρ 1 is a first transmission resource utilization rate occupied by the first base station in the second uplink transmission; p1 is the number of PRBs occupied by the first base station on the second uplink transmission; p is the total number of PRBs in the second uplink.

Step S302: the first base station sends a first request message carrying the resource utilization rate request indication to the second base station.

The first request message may be an inter-base station interface message, such as an X2 interface message. The first request message may carry information such as a resource utilization request indication, a first base station identifier, and a second base station identifier. The second base station may verify the first request message according to the second base station identifier, and send a first feedback message to the first base station according to the first base station identifier in a subsequent step (corresponding to step X).

Step S303: and the second base station responds to the resource utilization rate request indication to acquire the utilization rate of a second transmission resource of a second uplink occupied by the second base station.

Specifically, the second base station obtains the number of PRBs occupied by the second base station in the second uplink transmission and the total number of PRBs in the second uplink, obtains a ratio of the number of PRBs occupied by the second base station in the second uplink transmission to the total number of PRBs in the second uplink, and takes the ratio as the utilization rate of the second transmission resource.

In a specific implementation, the second base station may calculate the second transmission resource utilization by using the following formula:

ρ2＝P2/P；

ρ 2 is a second transmission resource utilization rate occupied by the second base station in the second uplink transmission; p2 is the number of PRBs occupied by the second base station on the second uplink transmission; p is the total number of PRBs in the second uplink.

Step S304: and the second base station sends a first feedback message carrying the utilization rate of a second transmission resource of a second uplink occupied by the second base station to the first base station.

The first feedback message may carry the second transmission resource utilization ρ 2, the first base station identifier, and the second base station identifier. The first feedback message may be an inter-base station interface message, such as an X2 interface message.

Step S305, the first base station calculates the utilization rate of the second uplink transmission resource according to the utilization rate of the first transmission resource and the utilization rate of the second transmission resource.

Specifically, the first base station obtains a sum of the first transmission resource utilization rate and the second transmission resource utilization rate as the second uplink transmission resource utilization rate.

In a specific implementation, the first base station may calculate the second uplink transmission resource utilization by using the following formula:

ρ sul ═ ρ 1+ ρ 2; rho sul is the utilization rate of the transmission resource of the second uplink; rho 1 is the utilization rate of a second transmission resource occupied by the first base station in the second uplink transmission; ρ 2 is a second transmission resource utilization rate occupied by the second base station in the second uplink transmission.

Of course, it is understood that the above-listed manner in which the first base station obtains the utilization rate of the second uplink transmission resource of the first uplink is only an example, and in a specific implementation, the manner in which the first base station obtains the utilization rate of the second uplink transmission resource of the first uplink may also be other than the above-listed manner, as long as the ratio of the occupied transmission resource in the second uplink to the total transmission resource of the second uplink can be obtained.

In a specific implementation, if the transmission resource in the second uplink used by the first base station is the first transmission resource and the transmission resource in the second uplink used by the second base station is the second transmission resource, in order to avoid interference, the first base station and the second base station cannot multiplex the same transmission resource of the second uplink, so that the time-frequency positions of the first transmission resource and the second transmission resource are different. Meanwhile, since the total amount of the transmission resources of the second uplink is fixed, the total amount of the resources of the first transmission resources and the second transmission resources is fixed, the more the first transmission resources are, the less the second transmission resources are; conversely, the fewer the first transmission resources, the more the second transmission resources.

Step S207: the first base station determines whether the utilization rate of the second uplink transmission resource is higher than a preset second threshold, and if so, executes step S208; if the determination result is negative, step S206 is executed.

The preset second threshold may be set by a person skilled in the art according to actual conditions, and the present invention is not limited to this.

Step S208: and the first base station sends a second indication message carrying the load balancing request to the second base station.

Specifically, the second base station shares the second uplink with the first base station. The second base station is specifically a base station supporting only one second uplink (i.e. SUL uplink) configured, for example, a 3G base station for providing 3G service, a 4G base station for providing 4G service, and so on. The second indication message may specifically carry the load balancing request, and may also carry information such as the first base station identifier and the second base station identifier. The second indication message may specifically be an interface message between base stations, for example, an X2 interface message.

Step S209: and the second base station responds to the load balancing request and determines a second target UE and a third base station according to a second preset condition.

Wherein, the second preset condition may be: and the difference value between the signal receiving power of the serving cell of the UE and the signal receiving power of the adjacent cell is smaller than a second preset threshold value. The second preset threshold may be set by a person skilled in the art according to actual conditions, and the present invention is not limited thereto. In a specific implementation, the second preset threshold may preferably be 3 or 5 (unit: dB).

Specifically, if the difference between the RSRP of the serving cell measured by the second target UE and the RSRP of the neighboring cell is small, it indicates that the second target UE is located in an overlapping coverage area of the second base station and the third base station, such as an area a (an area shown by cross hatching in fig. 4) shown in fig. 4, which may not only improve the probability that the second target UE accesses the third base station, but also reduce the load of the second base station without affecting the service performance of the UE.

Specifically, in a preferred implementation manner, the second preset condition may specifically be: and the difference value of the RSRP measurement value of the UE serving cell and the RSRP measurement value of the adjacent cell is smaller than a second preset threshold value.

The second preset condition for determining the second target UE and the third base station, as shown in fig. 4, may include the following steps:

step S401: the second base station acquires a service cell RSRP measurement value and a neighbor cell RSRP measurement value sent by UE accessing the second base station.

Step S402: and the second base station calculates the difference value of the RSRP measurement value of the service cell and the RSRP measurement value of the adjacent cell.

Step S403: the second base station judges whether the difference value is less than or equal to a second preset threshold value; if yes, go to step S404; if not, the process is ended.

Step S404: and the second base station determines the UE as a second target UE and determines the base station corresponding to the RSRP measurement value of the neighboring cell as a third base station.

Step S210: and the second base station sends a resource allocation request message to the third base station, so that the third base station allocates uplink transmission resources of the third base station to the second target UE according to the resource allocation request message.

The resource allocation request message carries a second base station identifier, a third base station identifier, a second target UE uplink and a resource allocation request indication. The resource allocation request message may be an inter-base station interface message, such as an X2 interface message.

Step S211: the second base station receives a resource allocation request feedback message sent by the third base station; and the resource allocation request feedback message carries the uplink transmission resource of the third base station allocated by the third base station for the second target UE.

The resource allocation request feedback message may be an interface message between base stations, such as an X2 interface message. The resource allocation request feedback message carries a third base station uplink transmission resource allocated by the third base station for the second target UE, and may also carry a second base station identifier, a third base station identifier, and a second target UE identifier, so that the second base station verifies the resource allocation request feedback message.

Step S212: and the second base station sends a switching indication message carrying the uplink transmission resource of the third base station and the identifier of the third base station to the second target UE, so that the second target UE can access the third base station according to the identifier of the third base station and use the uplink transmission resource of the third base station to transmit data.

The handover indication message may be an RRC message, which may carry information such as uplink transmission resources of the third base station, an identifier of the second target UE, and a load balancing indication.

Through the step, the second target UE accessed to the second base station in the second uplink can be switched from the second base station to the third base station, so that the load of the second uplink is reduced under the condition of not influencing the uplink data transmission process of the first base station, and the uplink transmission performance of the first base station is effectively improved.

The present invention further provides a load balancing apparatus 500, which is applied to a first base station or a chip of the first base station, and as shown in fig. 5, the load balancing apparatus 500 includes:

a first obtaining module 51, configured to obtain a first uplink transmission resource utilization rate of a first uplink.

Optionally, the first obtaining module 51 may be specifically configured to: acquiring the number of first Physical Resource Blocks (PRBs) occupying a first uplink by a first base station and the total number of PRBs in the first uplink; and acquiring the ratio of the number of the first physical resource blocks PRB to the total number of PRBs in the first uplink as the utilization rate of the transmission resources of the first uplink.

A first determining module 52, configured to determine whether the first uplink transmission resource utilization rate is higher than a preset first threshold.

A determining module 53, configured to determine, if the determination result of the first determining module 52 is yes, a first target UE in the UE accessing the first uplink according to a first preset condition.

Optionally, the determining module 53 may be specifically configured to: acquiring a Reference Signal Received Power (RSRP) measured value of a serving cell sent by UE; judging whether the RSRP measurement value of the serving cell is less than or equal to a first preset threshold value or not; and if so, determining the UE as the first target UE.

An allocating module 54, configured to allocate a second uplink transmission resource for the first target UE; wherein the frequency of the second uplink is less than the frequency of the first uplink.

The assignment module 54 may be specifically configured to: second uplink transmission resources are allocated for the first target UE from the second uplink unused PRB resources.

A sending module 55, configured to send a first indication message carrying a frequency of a second uplink and a second uplink transmission resource to the first target UE, so that the first target UE switches the first uplink accessed by the first target UE to the second uplink according to the frequency of the second uplink, and transmits data by using the second uplink transmission resource.

A second obtaining module 56, configured to obtain a second uplink transmission resource utilization rate of the second uplink.

Optionally, the second obtaining module 56 may specifically be configured to: acquiring the utilization rate of a first transmission resource of a second uplink occupied by a first base station; sending a first request message carrying a resource utilization rate request indication to a second base station; receiving a first feedback message which is sent by a second base station and carries the utilization rate of a second transmission resource of a second uplink occupied by the second base station; and calculating the utilization rate of the second uplink transmission resource according to the utilization rate of the first transmission resource and the utilization rate of the second transmission resource.

A second determining module 57, configured to determine whether the second uplink transmission resource utilization rate is higher than a preset second threshold.

The sending module 55 is further configured to, when the determination result of the second determining module 57 is yes, send a second indication message carrying a load balancing request to the second base station, so that the second base station determines a second target UE among UEs accessing the second base station according to the load balancing request, determines a third base station, and sends a resource allocation request message to the third base station, and receives a resource allocation request feedback message carrying a third base station uplink transmission resource allocated by the third base station to the second target UE, and sends a handover indication message carrying the third base station uplink transmission resource and a third base station identifier to the second target UE according to the third base station uplink transmission resource, so that the second target UE accesses the third base station according to the third base station identifier, and the second target UE uses the third base station uplink transmission resource to transmit data.

All relevant contents of the steps related to the above method embodiments may be referred to the functional description of the corresponding functional module, and the functions thereof are not described herein again.

The present invention further provides a load balancing apparatus 700, which is applied to a second base station or a chip of the second base station, and as shown in fig. 7, the load balancing apparatus 700 includes:

a receiving module 71, configured to receive a second indication message carrying a load balancing request sent by a first base station; after the first base station switches the first target UE from the first uplink to the second uplink, if the utilization rate of the transmission resource of the second uplink is determined to be higher than a preset second threshold, a second indication message is generated;

a determining module 72, configured to determine, in response to the load balancing request, a second target UE and a third base station according to a second preset condition.

Optionally, the determining module 72 may be specifically configured to: acquiring a service cell RSRP measurement value and a neighbor cell RSRP measurement value sent by UE accessed to a second base station; calculating a difference value between a service cell RSRP measurement value and a neighbor cell RSRP measurement value; judging whether the difference value is smaller than or equal to a second preset threshold value or not; and if so, determining that the UE is the second target UE, and the base station corresponding to the neighbor cell RSRP measurement value is the third base station.

A sending module 73, configured to send a resource allocation request message to the third base station according to the determination result of the determining module 72, so that the third base station allocates, according to the resource allocation request message, an uplink transmission resource of the third base station to the second target UE;

the receiving module 71 is further configured to: after the sending module 63 sends the resource allocation request message, receiving a resource allocation request feedback message sent by a third base station; the resource allocation request feedback message carries a third base station uplink transmission resource allocated by the third base station for the second target UE;

the sending module 73 is further configured to: after the receiving module 71 receives the resource allocation request feedback message, it sends a handover indication message carrying the uplink transmission resource of the third base station and the identifier of the third base station to the second target UE, so that the second target UE accesses the third base station according to the identifier of the third base station and uses the uplink transmission resource of the third base station to transmit data.

In the case of using an integrated module, the chip load balancing apparatus applied to the first base station or the first base station includes: the device comprises a storage unit, a processing unit and an interface unit. The processing unit is configured to control and manage the operation of the chip load balancing apparatus applied to the first base station or the first base station, for example, the processing unit is configured to execute each step in fig. 2, fig. 3, and fig. 5 by the chip load balancing apparatus applied to the first base station or the first base station. The interface unit is used for interaction between the first base station or a chip load balancing device of the first base station and other devices; and the storage unit is used for storing codes and data applied to the first base station or the chip load balancing device of the first base station.

For example, the processing unit is a processor, the storage unit is a memory, and the interface unit is a communication interface. The chip load balancing apparatus applied to the first base station or the first base station is shown in fig. 8, and includes a communication interface 801, a processor 802, a memory 803, and a bus 804, where the communication interface 801 and the processor 802 are connected to the memory 803 through the bus 804.

The processor 802 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs in accordance with the teachings of the present disclosure.

The Memory 803 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 803 is used for storing application program codes for executing the scheme of the application, and the execution of the application program codes is controlled by the processor 802. The communication interface 801 is used to support the first base station or the chip load balancing apparatus applied to the first base station to interact with other apparatuses. The processor 802 is configured to execute application program code stored in the memory 803 to implement the methods of embodiments of the present invention.

In the case of using an integrated module, the chip load balancing apparatus applied to the second base station or the second base station includes: the device comprises a storage unit, a processing unit and an interface unit. The processing unit is configured to control and manage the operation of the chip load balancing apparatus applied to the second base station or the second base station, for example, the processing unit is configured to execute each step in fig. 2, fig. 3, and fig. 5 by the chip load balancing apparatus applied to the second base station or the second base station. The interface unit is used for interaction between the second base station or a chip load balancing device of the second base station and other devices; and the storage unit is used for storing codes and data applied to the second base station or the chip load balancing device of the second base station.

For example, the processing unit is a processor, the storage unit is a memory, and the interface unit is a communication interface. The chip load balancing apparatus applied to the second base station or the second base station is shown in fig. 9, and includes a communication interface 901, a processor 902, a memory 903, and a bus 904, where the communication interface 901 and the processor 902 are connected to the memory 903 through the bus 904.

The processor 902 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to control the execution of programs in accordance with the teachings of the present disclosure.

The Memory 903 may be a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 903 is used for storing application program codes for executing the scheme of the application, and the processor 902 controls the execution. The communication interface 901 is used to support the second base station or the interaction between the chip load balancing apparatus of the second base station and other apparatuses. The processor 902 is configured to execute application program codes stored in the memory 903, thereby implementing the load balancing method in the embodiment of the present invention.

An embodiment of the present invention further provides a base station, including the load balancing apparatus 500 or the load balancing apparatus 600 described above.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. Embodiments of the present invention also provide a storage medium, which may include a memory for storing computer software instructions for a chip load balancing apparatus applied to a first base station or a first base station, or a chip load balancing apparatus applied to a second base station or a second base station, and the computer software instructions include program codes designed to execute the load balancing method according to the embodiments of the present invention. Specifically, the software instructions may be composed of corresponding software modules, and the software modules may be stored in a Random Access Memory (RAM), a flash Memory, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a register, a hard disk, a removable hard disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor.

The embodiment of the present invention further provides a computer program, which can be directly loaded into the memory and contains a software code, and the computer program can implement the load balancing method after being loaded and executed by the computer.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method of load balancing, comprising:

a first base station acquires the utilization rate of a first uplink transmission resource of a first uplink and judges whether the utilization rate of the first uplink transmission resource is higher than a preset first threshold or not; the first base station is a base station supporting simultaneous configuration of an Uplink (UL) and a downlink shared resource (SUL); the first uplink is a UL link; the first uplink transmission resource utilization rate is a ratio of transmission resources occupied in the first uplink to all transmission resources in the first uplink;

if the first base station is accessed to the first uplink, the first base station determines first target UE in the UE accessed to the first uplink according to a first preset condition;

the first base station allocates a second uplink transmission resource to the first target UE; wherein a frequency of the second uplink is less than a frequency of the first uplink; the second uplink is a SUL link; the second uplink transmission resource is an unused PRB resource in the second uplink; the unused PRB resources are specifically all PRB resources in the second uplink except the used PRB resources; the used PRB resources comprise PRB resources occupied by UE accessing the first base station and using the second uplink and PRB resources occupied by UE accessing the second base station and using the second uplink; the second base station is a base station only with SUL link resources;

the first base station sends a first indication message carrying a frequency of a second uplink and a second uplink transmission resource to the first target UE, so that the first target UE switches the first uplink accessed by the first target UE into the second uplink according to the frequency of the second uplink and transmits data by using the second uplink transmission resource;

the first base station acquires the utilization rate of the second uplink transmission resource of the second uplink and judges whether the utilization rate of the second uplink transmission resource is higher than a preset second threshold or not; the second uplink transmission resource utilization rate is a ratio of transmission resources occupied in the second uplink to all transmission resources in the second uplink;

if the judgment result is yes, the first base station sends a second indication message carrying a load balancing request to the second base station; the second base station sharing the second uplink with the first base station;

and the second base station sends a switching indication message carrying a third base station uplink transmission resource and a third base station identifier to the second target UE, so that the second target UE can access the third base station according to the third base station identifier and transmit data by using the third base station uplink transmission resource.

2. The method of claim 1, wherein the obtaining, by the first base station, the first uplink transmission resource utilization rate of the first uplink comprises:

the first base station acquires the number of first Physical Resource Blocks (PRBs) occupying the first uplink and the total number of PRBs in the first uplink;

and the first base station takes the ratio of the number of PRBs of the first physical resource block occupying the first uplink by the first base station to the total number of PRBs in the first uplink as the utilization rate of the transmission resource of the first uplink.

3. The method according to claim 1, wherein the obtaining, by the first base station, the utilization rate of the second uplink transmission resource of the second uplink comprises:

the first base station acquires the utilization rate of the first transmission resource of the second uplink occupied by the first base station;

the first base station sends a first request message carrying a resource utilization rate request indication to a second base station;

and the first base station calculates the utilization rate of the second uplink transmission resource according to the utilization rate of the first transmission resource and the utilization rate of the second transmission resource.

4. The load balancing method according to claim 1, wherein the determining, by the first base station, the first target UE according to the first preset condition among the UEs accessing the first uplink includes:

a first base station acquires a Reference Signal Received Power (RSRP) measured value of a serving cell sent by the UE;

and if so, determining that the UE is the first target UE.

5. The load balancing method according to claim 1, wherein the allocating, by the first base station, the second uplink transmission resource of the second uplink to the first target UE specifically includes:

allocating the second uplink transmission resource for the first target UE from the second uplink unused PRB resource.

6. The method according to claim 1, wherein the determining, by the second base station, a second target UE among UEs accessing the second base station according to a second preset condition and determining a third base station in response to the load balancing request comprises:

calculating a difference value between the RSRP measurement value of the serving cell and the RSRP measurement value of the neighbor cell;

judging whether the difference value is smaller than or equal to a second preset threshold value or not;

and if so, determining that the UE is a second target UE, and the base station corresponding to the neighbor cell RSRP measurement value is a third base station.

7. A load balancing device is applied to a first base station or a chip of the first base station, wherein the first base station is a base station supporting simultaneous configuration of an Uplink (UL) and a downlink shared resource (SUL), and the load balancing device comprises:

a first obtaining module, configured to obtain a first uplink transmission resource utilization rate of a first uplink; the first uplink transmission resource utilization rate is a ratio of transmission resources occupied in the first uplink to all transmission resources in the first uplink; the first uplink is a UL link;

a first judging module, configured to judge whether a utilization rate of the first uplink transmission resource is higher than a preset first threshold;

an allocation module configured to allocate a second uplink transmission resource to the first target UE; wherein a frequency of the second uplink is less than a frequency of the first uplink; the second uplink is a SUL link; the second uplink transmission resource is an unused PRB resource in the second uplink; the unused PRB resources are specifically all PRB resources in the second uplink except the used PRB resources; the used PRB resources comprise PRB resources occupied by UE accessing the first base station and using the second uplink and PRB resources occupied by UE accessing the second base station and using the second uplink; the second base station is a base station only with SUL link resources;

a sending module, configured to send a first indication message carrying a frequency of a second uplink and a second uplink transmission resource to the first target UE, so that the first target UE switches a first uplink accessed by the first target UE to the second uplink according to the frequency of the second uplink, and transmits data using the second uplink transmission resource;

a second obtaining module, configured to obtain a second uplink transmission resource utilization rate of the second uplink; the second uplink transmission resource utilization rate is a ratio of transmission resources occupied in the second uplink to all transmission resources in the second uplink;

a second determining module, configured to determine whether a utilization rate of the second uplink transmission resource is higher than a preset second threshold;

the sending module is further configured to send a second indication message carrying a load balancing request to the second base station when the determination result of the second determining module is yes, for the second base station to determine a second target UE among the UEs accessing the second base station according to the load balancing request, determining a third base station, sending a resource allocation request message to the third base station, and receiving a resource allocation request feedback message which is sent by the third base station and carries uplink transmission resources of the third base station allocated to the second target UE by the third base station, sending a switching indication message carrying the uplink transmission resource of the third base station and the identifier of the third base station to the second target UE according to the uplink transmission resource of the third base station, and enabling the second target UE to access the third base station according to the third base station identifier, and enabling the second target UE to transmit data by using the uplink transmission resource of the third base station.

8. The load balancing device according to claim 7, wherein the first obtaining module is specifically configured to:

acquiring the number of first Physical Resource Blocks (PRBs) occupying the first uplink and the total number of PRBs in the first uplink by the first base station;

acquiring the utilization rate of the first uplink transmission resource; and the first base station takes the ratio of the number of PRBs of the first physical resource block occupying the first uplink by the first base station to the total number of PRBs in the first uplink as the utilization rate of the transmission resource of the first uplink.

9. The load balancing device according to claim 7, wherein the second obtaining module is specifically configured to:

acquiring the utilization rate of a first transmission resource of the second uplink occupied by the first base station;

receiving a first feedback message which is sent by the second base station and carries the utilization rate of a second transmission resource occupied by the second base station on the second uplink;

10. The load balancing device of claim 7, wherein the determining module is specifically configured to:

acquiring a Reference Signal Received Power (RSRP) measured value of a serving cell sent by the UE;

and if so, determining that the UE is the first target UE.

11. The load balancing device according to claim 7, wherein the allocating module is specifically configured to:

12. A load balancing device is applied to a second base station or a chip of the second base station, wherein the second base station is a base station only with SUL link resources, and the load balancing device comprises:

a receiving module, configured to receive a second indication message carrying a load balancing request sent by a first base station; after the first base station switches the first target UE from the first uplink to the second uplink, if it is determined that the utilization rate of the second uplink transmission resource is higher than a preset second threshold, the second indication message is generated; the first uplink is a UL link; the first base station is a base station supporting simultaneous configuration of an Uplink (UL) and a downlink shared resource (SUL); the second uplink is a SUL link; the second uplink transmission resource is an unused PRB resource in the second uplink; the unused PRB resources are specifically all PRB resources in the second uplink except the used PRB resources; the used PRB resources comprise PRB resources occupied by UE accessing the first base station and using the second uplink and PRB resources occupied by UE accessing the second base station and using the second uplink; the second uplink transmission resource utilization rate is a ratio of transmission resources occupied in the second uplink to all transmission resources in the second uplink;

a determining module, configured to determine, in response to the load balancing request, a second target UE among UEs accessing the second base station according to a second preset condition, and determine a third base station;

a sending module, configured to send a resource allocation request message to the third base station according to the determination result of the determining module, so that the third base station allocates, according to the resource allocation request message, uplink transmission resources of the third base station to the second target UE;

the receiving module is further configured to: after the sending module sends the resource allocation request message, receiving a resource allocation request feedback message sent by the third base station; the resource allocation request feedback message carries a third base station uplink transmission resource allocated by the third base station for the second target UE;

the sending module is further configured to: after the receiving module receives the resource allocation request feedback message, sending a switching indication message carrying a third base station uplink transmission resource and a third base station identifier to the second target UE, so that the second target UE can access the third base station according to the third base station identifier and use the third base station uplink transmission resource to transmit data.

13. The load balancing device of claim 12, wherein the determining module is specifically configured to:

14. A load balancing apparatus, comprising: one or more processors; the processor is configured to execute a computer program code in the memory, the computer program code comprising instructions, the load balancing apparatus to perform the load balancing method as claimed in any one of claims 1 to 6 performed by the first base station or the second base station.

15. A base station comprising the load balancing apparatus of any one of claims 7 to 14.

16. A storage medium storing instruction code for performing a method of load balancing according to any one of claims 1-6.