CN110401970B

CN110401970B - Transmission method, base station and terminal

Info

Publication number: CN110401970B
Application number: CN201810378888.0A
Authority: CN
Inventors: 曹丽芳; 张龙; 旷婧华
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-04-25
Filing date: 2018-04-25
Publication date: 2021-11-19
Anticipated expiration: 2038-04-25
Also published as: CN110401970A

Abstract

The invention provides a transmission method, a base station and a terminal, wherein the transmission method of the base station side comprises the following steps: when determining that the uplink rate of the terminal when residing in a first cell does not meet the current service requirement and the uplink rate of the terminal when residing in an adjacent second cell meets the current service requirement, sending a first switching instruction for switching to the second cell to the terminal, and triggering the terminal to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency; the first frequency is higher than the second frequency, and the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell. The embodiment of the invention can fully utilize the downlink frequency spectrum resource with lower frequency to increase the downlink capacity, enhance the uplink coverage performance and the edge rate and improve the use experience of users.

Description

Transmission method, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a transmission method, a base station, and a terminal.

Background

The Ministry of industry and communications in 2017 shows that the medium-high frequency band 3.3GHz-3.6GHz and 4.8GHz-5.0GHz need to be divided into 5G working frequency bands, and as the higher the frequency band is, the worse the coverage capability is, the more easily the uplink power is limited to become a bottleneck, so how to improve the medium-high frequency coverage becomes an important problem facing 5G deployment.

A specific example is described below, and referring to fig. 1, taking 3.5GHz deployment 5G as an example, it can be found through link budget that at a distance of 400 meters, the downlink marginal rate is about 220Mbps, while the uplink is only 1Mbps, and the uplink and downlink performance difference is very different. Under a 192 antenna array (64 channels), downlink 200W transmitting power, uplink maximum 0.4W (26 dBm) transmitting power, TDD (Time Division Duplexing) downlink resource configuration is more than uplink, downlink bandwidth and power are sufficient for cell edges, uplink power is limited, budget difference of uplink and downlink links is about 10dB, downlink continuous coverage feasibility is high based on current network station distance, uplink service continuous coverage challenge is still large even considering a high-power terminal, and downlink TCP (Transmission Control Protocol) service also affects downlink user experience due to a poor uplink.

For the above problem, as shown in fig. 2, a countermeasure strategy adopted by the industry at present is to use a 5G uplink and downlink decoupling technology, also called a SUL (supplemental UL link), which can break uplink and downlink binding and the traditional limitation of the same frequency band, and pass the 5G uplink through a lower frequency spectrum of 1.8GHz or less than other 3GHz while enjoying 3.5GHz downlink large capacity, so as to implement co-site deployment and co-coverage of 5G 3.5GHz and LTE (Long Term Evolution )1.8GHz, and greatly improve network coverage.

Specifically, when the uplink coverage of the medium-high frequency is weak, the uplink and downlink decoupling function is activated, so that the uplink of the user is converted to the low frequency, and the downlink still stays in the 3.5GHz frequency band, thereby enhancing the uplink coverage performance and the edge rate and improving the experience of the edge user.

Although the use of the SUL technology can achieve the effect of uplink coverage, the symmetry of low-frequency uplink and downlink frequency spectrums is damaged at the same time, and precious downlink frequency spectrum resources are wasted.

Disclosure of Invention

The embodiment of the invention provides a transmission method, a base station and a terminal, and aims to solve the problems that in the prior art, the uplink power is limited due to the fact that the frequency band is increased, and the existing 5G uplink and downlink decoupling strategies destroy the symmetry of low-frequency uplink and downlink frequency spectrums and waste downlink frequency spectrum resources.

The embodiment of the invention provides a transmission method, which comprises the following steps:

when determining that the uplink rate of a terminal when the terminal resides in a first cell does not meet the current service requirement and the uplink rate of the terminal when the terminal resides in an adjacent second cell meets the current service requirement, sending a first switching instruction for switching to the second cell to the terminal, and triggering the terminal to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency;

the first frequency is higher than the second frequency, and the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell.

Preferably, the method further comprises:

estimating the uplink rate of the terminal in the second cell when the uplink rate of the terminal in the first cell does not meet the current service requirement;

and when the uplink rate of the terminal in the second cell is greater than the uplink rate of the terminal in the first cell and meets the current service requirement, sending a first switching instruction for switching to the second cell to the terminal.

Preferably, the step of estimating the uplink rate of the terminal in the second cell includes:

and estimating the uplink rate of the terminal in the second cell according to the downlink Reference Signal Received Power (RSRP) measurement result, the uplink background noise and the congestion condition of the second cell.

Preferably, before determining that the uplink rate of the terminal when the terminal is camped on the first cell does not meet the current service requirement, the method further includes:

acquiring an uplink rate of the terminal when the terminal resides in the first cell;

judging whether the uplink rate of the terminal when the terminal resides in the first cell is greater than or equal to an uplink rate threshold corresponding to a service currently executed by the terminal;

and when the uplink rate of the terminal when the terminal resides in the first cell is less than the uplink rate threshold corresponding to the service currently executed by the terminal, determining that the uplink rate of the terminal when the terminal resides in the first cell does not meet the current service requirement.

Preferably, the step of obtaining the uplink rate when the terminal resides in the first cell includes:

acquiring an uplink rate of the terminal when the terminal resides in the first cell according to the uplink cache size and the uplink packet delay size; or

And acquiring the uplink rate of the terminal when the terminal resides in the first cell through the downlink Reference Signal Received Power (RSRP) and the uplink Modulation and Coding Strategy (MCS).

Preferably, the step of triggering the terminal to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency includes:

configuring a carrier wave of a second frequency corresponding to the second cell as a main carrier wave and a carrier wave of a first frequency corresponding to the first cell as an auxiliary carrier wave;

and activating the downlink carrier aggregation of the main carrier and the auxiliary carrier.

Preferably, after the step of triggering the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, and when the terminal resides in the second cell, the method further includes:

monitoring whether the uplink rate of the terminal in the first cell meets the current service requirement;

and when the current service requirement is met, sending a second switching instruction for switching from the second cell to the first cell to the terminal, and controlling the terminal to stop downlink carrier aggregation of the carrier wave of the first frequency and the carrier wave of the second frequency.

An embodiment of the present invention further provides a transmission method, including:

receiving a first switching instruction sent by a base station and used for switching a first cell to an adjacent second cell, and receiving a triggering instruction sent by the base station and used for triggering a terminal to perform downlink carrier aggregation of a carrier of a first downlink frequency and a carrier of a second downlink frequency;

according to the first switching instruction, the terminal is switched from the first cell to the second cell;

according to the trigger instruction, the terminal carries out downlink carrier aggregation of the downlink carrier wave of the first frequency and the downlink carrier wave of the second frequency;

Preferably, when the uplink rate of the terminal when camped on the first cell meets the current service requirement, the method further includes:

receiving a second switching instruction sent by the base station and used for switching the second cell to the first cell, and a stopping instruction used for controlling the terminal to stop downlink carrier aggregation of the carrier wave of the first frequency and the carrier wave of the second frequency;

switching from the second cell to the first cell according to the second switching instruction;

and stopping downlink carrier aggregation of the downlink carrier wave of the first frequency and the downlink carrier wave of the second frequency according to the stop instruction.

An embodiment of the present invention provides a base station, including a processor and a transceiver, where the transceiver is configured to:

when the processor determines that the uplink rate of the terminal when residing in a first cell does not meet the current service requirement and the uplink rate of the terminal when residing in an adjacent second cell meets the current service requirement, a first switching instruction for switching to the second cell is sent to the terminal, and the terminal is triggered to carry out downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency;

Preferably, the processor is further configured to:

and when the uplink rate of the terminal in the second cell is greater than the uplink rate of the terminal in the first cell and meets the current service requirement, the transceiver sends a first switching instruction for switching to the second cell to the terminal.

Preferably, the processor, when estimating the uplink rate of the terminal in the second cell, is specifically configured to:

Preferably, before determining that the uplink rate of the terminal when camped on the first cell does not satisfy the current service requirement, the processor is further configured to:

Preferably, the processor, when acquiring the uplink rate when the terminal resides in the first cell, is specifically configured to:

Preferably, when the transceiver triggers the terminal to perform downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the second frequency, the transceiver is specifically configured to:

Preferably, after the transceiver triggers the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, and when the terminal is camped in the second cell, the processor is further configured to:

and when the current service requirement is met, the transceiver sends a second switching instruction for switching from the second cell to the first cell to the terminal, and controls the terminal to stop downlink carrier aggregation of the carrier wave of the first frequency and the carrier wave of the second frequency.

An embodiment of the present invention further provides a terminal, including a processor and a transceiver, where the transceiver is configured to:

the processor is configured to switch from the first cell to the second cell according to the first switching instruction; according to the trigger instruction, downlink carrier aggregation of downlink carriers of the first frequency and the second frequency is carried out;

Preferably, when the uplink rate of the terminal when camped on the first cell meets the current traffic demand, the transceiver is further configured to:

the processor is configured to: switching from the second cell to the first cell according to the second switching instruction; and stopping downlink carrier aggregation of the downlink carrier wave of the first frequency and the downlink carrier wave of the second frequency according to the stop instruction.

The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the steps in the transmission method on the base station side described above when executing the program.

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the steps in the above-described terminal-side transmission method when executing the program.

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps in the transmission method of any one of the above.

The technical scheme of the embodiment of the invention at least comprises the following beneficial effects:

according to the technical scheme, when the uplink rate of the terminal when residing in the first cell does not meet the current service requirement and the uplink rate of the terminal when residing in the adjacent second cell meets the current service requirement, a first switching instruction for switching to the second cell is sent to the terminal, the terminal is triggered to perform downlink carrier aggregation of a carrier wave of a first frequency corresponding to the downlink first cell and a carrier wave of a second frequency corresponding to the downlink second cell, the terminal performs cell switching, the first frequency is switched to the second frequency lower than the first frequency, meanwhile, the terminal can perform downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency, downlink spectrum resources of the lower frequency can be fully utilized to increase downlink capacity, uplink coverage performance and edge rate are enhanced, and user experience of a user is improved.

Drawings

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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.

FIG. 1 shows a schematic diagram of the 3.5GHz link budget for 5G;

FIG. 2 shows a schematic diagram of a 5G uplink and downlink decoupling strategy;

fig. 3 is a diagram illustrating a transmission method at the base station side according to an embodiment of the present invention;

fig. 4 is a second schematic diagram of a transmission method at the base station side according to the embodiment of the invention;

fig. 5 is a third schematic diagram illustrating a transmission method at the base station side according to an embodiment of the present invention;

fig. 6 is a diagram illustrating a transmission method at a terminal side according to an embodiment of the present invention;

fig. 7 is a second schematic diagram of a terminal-side transmission method according to an embodiment of the invention;

FIG. 8 is a diagram illustrating an exemplary implementation structure of a base station according to an embodiment of the present invention;

fig. 9 is a schematic diagram of an implementation structure of a terminal according to an embodiment of the present invention;

FIG. 10 is a diagram of a second exemplary implementation structure of a base station according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating an implementation structure of a terminal according to an embodiment of the present invention.

Detailed Description

An embodiment of the present invention provides a transmission method, as shown in fig. 3, including:

step 301, when it is determined that the uplink rate of the terminal when residing in the first cell does not meet the current service requirement and the uplink rate of the terminal when residing in the adjacent second cell meets the current service requirement, sending a first switching instruction for switching to the second cell to the terminal, and triggering the terminal to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency; the first frequency is higher than the second frequency, and the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell.

The transmission method of the embodiment of the invention is applied to a base station, the base station can acquire the service currently executed by a terminal, when the uplink rate of the terminal residing in a first cell does not meet the current service requirement, whether the uplink rate of the terminal residing in an adjacent second cell meets the current service requirement needs to be determined, if so, a first switching instruction for switching from the first cell to the second cell is sent to the terminal, so that the terminal performs cell switching according to the first switching instruction.

When the base station sends the first handover command, the terminal is further required to be triggered to perform downlink carrier aggregation of a carrier with a downlink first frequency and a carrier with a second frequency, where the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell, where the first frequency may be a medium-high frequency, the corresponding frequency ranges may be 3.3GHz-3.6GHz and 4.8GHz-5.0GHz, the second frequency may be a low frequency, and the corresponding frequency may be 1.8GHz or other frequencies below 3GHz, such as 900 MHz. Of course, the above case is only an example, and the case of the first frequency and the second frequency is not limited thereto.

The terminal can perform cell switching according to the first switching instruction, can enhance uplink coverage performance after switching from the first cell to the second cell with lower frequency, and can increase downlink capacity by fully utilizing downlink spectrum resources with lower frequency after performing downlink carrier aggregation of the carrier with the downlink first frequency and the carrier with the second frequency.

The terminal of the embodiment of the invention needs to support downlink carrier aggregation, when the terminal resides in a middle-high frequency band (such as 3.5GHz), and as a user moves to an uplink coverage weak area, the terminal can be switched to a 5G network of a low frequency band (such as 900MHz) in situ, and simultaneously, the downlink two-carrier aggregation function is adaptively opened, namely, the downlink carrier aggregation of the 900MHz carrier and the 3.5GHz carrier is opened, so that the uplink advantage brought by 900MHz can be enjoyed, and the downlink spectrum resources of the middle-high frequency and the low frequency are fully utilized.

In the embodiment of the present invention, after the base station sends the first handover command to the terminal and triggers the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, when the terminal switches according to the first handover command and resides in the second cell, and the terminal performs downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, the base station may transmit downlink data to the terminal through the aggregated carrier, thereby achieving full utilization of downlink spectrum resources.

In the embodiment of the invention, when the uplink rate of the terminal in the first cell does not meet the current service requirement, the uplink rate of the terminal in the second cell is estimated; and when the uplink rate of the terminal in the second cell is greater than that of the terminal in the first cell and the current service requirement is met, sending a first switching instruction for switching to the second cell to the terminal.

When a base station acquires a service currently executed by a terminal and determines that an uplink rate of the terminal when the terminal is resided in a first cell does not meet a current service requirement, the uplink rate of the terminal when the terminal is resided in a second cell needs to be estimated, and if an estimation result is that the uplink rate of the terminal when the terminal is in the second cell is greater than the uplink rate of the terminal when the terminal is in the first cell, whether the uplink rate of the terminal when the terminal is in the second cell can meet the current service requirement needs to be judged. When the uplink rate of the terminal in the second cell is greater than the uplink rate of the terminal in the first cell and the uplink rate of the terminal in the second cell can meet the current service requirement, it may be determined that the second cell meets the handover condition, and at this time, a first handover instruction for handover to the second cell may be sent to the terminal. The terminal may perform cell handover according to the received first handover instruction, and handover from the camped first cell to the second cell.

In the embodiment of the present invention, the step of estimating the uplink rate of the terminal in the second cell includes:

When estimating the uplink rate of the terminal in the second cell, the base station needs to acquire the downlink RSRP (Reference Signal Receiving Power), the uplink background noise and the congestion condition of the second cell, and after acquiring the downlink RSRP, the uplink background noise and the congestion condition, estimates the uplink rate of the terminal in the second cell based on the downlink RSRP, the uplink background noise and the congestion condition.

In this embodiment of the present invention, before determining that the uplink rate of the terminal when the terminal is camped in the first cell does not meet the current service requirement, the method further includes:

acquiring an uplink rate when a terminal resides in a first cell; judging whether the uplink rate of the terminal when the terminal resides in the first cell is greater than or equal to the uplink rate threshold corresponding to the service currently executed by the terminal; and when the uplink rate of the terminal in the first cell is less than the uplink rate threshold corresponding to the service currently executed by the terminal, determining that the uplink rate of the terminal in the first cell does not meet the current service requirement.

Before determining that the uplink rate of the terminal when the terminal is resided in the first cell does not meet the current service requirement, the base station needs to acquire the uplink rate of the terminal when the terminal is resided in the first cell, and then judges whether the uplink rate of the terminal when the terminal is resided in the first cell meets the current service requirement or not based on the uplink rate of the terminal when the terminal is resided in the first cell.

When the determination is made, the base station needs to obtain an uplink rate threshold corresponding to a service currently executed by the terminal. Each service can correspond to an uplink rate threshold, and a corresponding relation between the service and the uplink rate threshold can be formed. The base station may search an uplink rate threshold corresponding to a service currently executed by the terminal in the correspondence relationship, after determining the uplink rate threshold corresponding to the service currently executed by the terminal, compare an uplink rate when the terminal resides in the first cell with the uplink rate threshold corresponding to the service currently executed by the terminal, determine that the uplink rate when the terminal resides in the first cell does not satisfy a current service requirement when the uplink rate when the terminal resides in the first cell is less than the uplink rate threshold corresponding to the service currently executed by the terminal, and determine that the uplink rate when the terminal resides in the first cell satisfies the current service requirement when the uplink rate when the terminal resides in the first cell is greater than or equal to the uplink rate threshold corresponding to the service currently executed by the terminal.

When it is determined that the uplink rate of the terminal when the terminal resides in the first cell does not meet the current service requirement and the uplink rate of the terminal when the terminal resides in the second cell meets the current service requirement, a first switching instruction for switching to the second cell may be sent to the terminal, and the terminal is triggered to perform downlink carrier aggregation of a downlink carrier of the first frequency and a downlink carrier of the second frequency.

The step of acquiring the uplink rate of the terminal when the terminal resides in the first cell in the embodiment of the present invention includes: acquiring an uplink rate of the terminal when the terminal resides in the first cell according to the uplink cache size and the uplink packet delay size; or

The base station may obtain the uplink buffer size and the uplink delay packet when obtaining the uplink rate at which the terminal resides in the first cell, and obtain the uplink rate at which the terminal resides in the first cell based on the obtained uplink buffer size and the obtained uplink delay packet.

When acquiring the uplink rate of the terminal when the terminal resides in the first cell, the base station may further acquire a downlink RSRP and an uplink MCS (Modulation and Coding Scheme), and based on the acquired downlink RSRP and uplink MCS, may acquire the uplink rate of the terminal when the terminal resides in the first cell.

In the embodiment of the present invention, the step of triggering the terminal to perform downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the downlink second frequency includes: configuring a carrier wave of a second frequency corresponding to a second cell as a main carrier wave and a carrier wave of a first frequency corresponding to a first cell as an auxiliary carrier wave; and activating the downlink carrier aggregation of the main carrier and the auxiliary carrier.

When the trigger terminal performs downlink carrier aggregation of a downlink carrier of a first frequency and a downlink carrier of a second frequency, the base station may configure the carrier of the second frequency corresponding to the second cell as a primary carrier, and configure the carrier of the first frequency corresponding to the first cell as a secondary carrier, that is, the carrier of the higher frequency is the secondary carrier, and the carrier of the lower frequency is the primary carrier. After the configuration is completed, the downlink carrier aggregation of the main carrier and the auxiliary carrier is activated, so that the terminal can perform downlink carrier aggregation of the downlink main carrier and the downlink carrier of the auxiliary carrier.

The carrier wave of the first frequency and the carrier wave of the second frequency are adopted to realize downlink carrier wave aggregation between frequency bands in the 5G system, and downlink frequency spectrum resources of lower frequencies can be fully utilized to increase downlink capacity.

The following describes the transmission method at the base station side in detail by using a specific example, as shown in fig. 4:

step 401, the terminal resides in a first cell, and the first cell corresponds to a first frequency.

Step 402, detecting whether the uplink rate meets the service requirement when the terminal resides in the first cell. And when the service requirement is not met, executing the step 403, otherwise, ending the process.

When the terminal resides in the first cell (for example, the first frequency corresponding to the first cell may be 3.5GHz), the base station may determine the uplink rate when the terminal resides in the first cell according to the uplink buffer size and the uplink packet delay size, and may further obtain the uplink rate when the terminal resides in the first cell according to the downlink RSRP and the uplink MCS. After the uplink rate of the terminal in the first cell is obtained, comparing the uplink rate of the terminal in the first cell with the uplink rate threshold corresponding to the service currently executed by the terminal, and when the uplink rate of the terminal in the first cell is smaller than the uplink rate threshold corresponding to the service currently executed by the terminal, determining that the uplink rate of the terminal in the first cell does not meet the current service requirement.

Step 403, detecting whether the uplink rate of the terminal in the adjacent second cell is greater than the uplink rate of the terminal in the first cell and meets the current service requirement. If yes, go to step 404, otherwise, end the process. Wherein the second frequency corresponding to the second cell is smaller than the first frequency corresponding to the first cell.

At this time, the uplink rate of the terminal in the second cell can be estimated according to the downlink RSRP measurement result, the uplink background noise and the congestion condition of the second cell. Then, it is determined whether the uplink rate of the terminal in the second cell meets the current service requirement, and when the uplink rate of the terminal in the first cell does not meet the service requirement and the uplink rate of the estimated terminal in the second cell can meet the service requirement (the second frequency corresponding to the second cell may be 900MHz), the base station may perform

steps

404, 405, and 406.

Step 404, the control terminal is switched from the first cell to the second cell.

Step 405, configuring a carrier of a second frequency corresponding to the second cell as a primary carrier and a carrier of a first frequency corresponding to the first cell as a secondary carrier, and activating downlink carrier aggregation of the primary carrier and the secondary carrier.

And step 406, sending downlink data to the terminal through the aggregated carrier, and then ending the process.

It should be noted that, when the terminal cannot meet the service requirement in the first cell and then is switched to the second cell, it should be ensured that the terminal preferentially resides in the first cell as far as possible in consideration of the rich spectrum resource of the first cell and the relatively deficient spectrum resource of the second cell. To achieve this, as the terminal moves, it is necessary to determine where to switch back to the first cell.

In this embodiment of the present invention, after the step of triggering the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, and when the terminal resides in the second cell, the method further includes: monitoring whether the uplink rate of the terminal in the first cell meets the current service requirement; and when the current service requirement is met, sending a second switching instruction for switching from the second cell to the first cell to the terminal, and controlling the terminal to stop downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency.

When the terminal resides in the second cell, the base station needs to estimate the uplink rate of the terminal in the first cell and monitor the uplink rate in real time, and when the uplink rate of the terminal in the first cell is monitored to meet the current service requirement; a second switching instruction for switching from the second cell to the first cell may be sent to the terminal, so that the terminal is switched to the first cell with a higher frequency, and the terminal is controlled to stop downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency.

The base station can estimate the uplink rate of the terminal in the first cell through the downlink RSRP measurement result, the uplink background noise and the congestion condition of the first cell.

The following describes a specific example of the case where the base station controls the terminal to switch from the second cell with lower frequency to the first cell with higher frequency, as shown in fig. 5:

step 501, the terminal resides in a second cell, and the second cell corresponds to a second frequency.

Step 502, estimating the uplink rate of the terminal in the first cell, and monitoring whether the uplink rate of the terminal in the first cell meets the current service requirement. If yes, go to step 503, otherwise, end the process. Wherein the first frequency of the first cell is greater than the second frequency of the second cell.

And the base station estimates the uplink rate of the terminal in the first cell through the downlink RSRP measurement result, the uplink background noise and the congestion condition of the first cell. And monitoring whether the uplink rate of the terminal in the first cell meets the current service requirement.

Step 503, the control terminal stops downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency.

Step 504, the control terminal is switched from the second cell to the first cell. The flow then ends.

In the above process, as long as the uplink rate of the terminal in the first cell can meet the service requirement, even if the uplink rate of the terminal in the second cell is higher, the terminal is switched to the first cell, so that the rich spectrum resource of the first cell is preferentially used as much as possible.

The whole implementation process of the transmission method at the base station side in the embodiment of the present invention is that, when a user resides in a first cell (for example, a first frequency corresponding to the first cell may be 3.5GHz), the base station may determine an uplink rate when the terminal resides in the first cell according to an uplink buffer size and an uplink packet delay size, and may further obtain the uplink rate when the terminal resides in the first cell according to a downlink RSRP and an uplink MCS. After acquiring the uplink rate of the terminal when the terminal resides in the first cell, judging whether the uplink rate of the terminal when the terminal resides in the first cell meets the current service requirement. If the uplink rate of the terminal in the second cell can meet the service requirement, triggering the terminal to be switched from the first cell to the second cell, configuring a carrier wave of a second frequency corresponding to the second cell as a main carrier wave and a carrier wave of a first frequency corresponding to the first cell as an auxiliary carrier wave, and activating downlink carrier wave aggregation of the main carrier wave and the auxiliary carrier wave.

When the terminal resides in the second cell, the base station can estimate the uplink rate of the terminal in the first cell through the downlink RSRP measurement result, the uplink background noise and the congestion condition of the first cell, and when the uplink rate of the terminal in the first cell can meet the current service requirement, the terminal is controlled to stop downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency, and the terminal is controlled to be switched to the first cell from the second cell.

In the transmission method at the base station side in the embodiment of the present invention, when it is determined that the uplink rate when the terminal resides in the first cell does not satisfy the current service requirement and the uplink rate when the terminal resides in the adjacent second cell satisfies the current service requirement, a first switching instruction for switching to the second cell is sent to the terminal, and the terminal is triggered to perform downlink carrier aggregation of a carrier of a first frequency corresponding to the downlink first cell and a carrier of a second frequency corresponding to the second cell, so that the terminal performs cell switching, switches from the first frequency to the second frequency lower than the first frequency, and simultaneously, the terminal may perform downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the second frequency, and may fully utilize the downlink spectrum resource of the lower frequency to increase the downlink capacity, enhance the uplink coverage performance and the edge rate, and improve the user experience of the user.

Further, when it is determined that the uplink rate of the terminal in the first cell with higher frequency meets the service requirement, the terminal is controlled to switch to the first cell, and downlink carrier aggregation is stopped, so that the rich spectrum resources of the first cell can be preferentially used.

The invention not only can solve the problem of limited uplink coverage, but also supplements the downlink capacity, switches according to whether the service rate meets the service requirement, and can better ensure the user experience.

An embodiment of the present invention further provides a transmission method, applied to a terminal, as shown in fig. 6, including:

step 601, receiving a first switching instruction sent by a base station to switch from a first cell to an adjacent second cell, and receiving a trigger instruction sent by the base station to trigger a terminal to perform downlink carrier aggregation of a carrier of a first downlink frequency and a carrier of a second downlink frequency, where the first frequency is higher than the second frequency, the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell.

When a terminal resides in a first cell with higher frequency, and the uplink rate of the terminal when residing in the first cell is determined not to meet the current service requirement and the uplink rate of the terminal when residing in an adjacent second cell meets the current service requirement, a base station needs to send a first switching instruction for switching from the first cell to the second cell to the terminal, and after receiving the first switching instruction, the terminal performs cell switching according to the first switching instruction.

When the base station sends the first handover instruction, it is further required to send a trigger instruction for triggering the terminal to perform downlink carrier aggregation of the carrier of the first downlink frequency and the carrier of the second downlink frequency.

The first frequency may be a medium-high frequency, the corresponding frequency ranges may be 3.3GHz-3.6GHz and 4.8GHz-5.0GHz, the second frequency may be a low frequency, and the corresponding frequency may be 1.8GHz or other frequencies below 3GHz, such as 900 MHz. Of course, the above case is only an example, and the case of the first frequency and the second frequency is not limited thereto.

It should be noted that the base station may obtain the uplink rate of the terminal when the terminal resides in the first cell, and determine whether the uplink rate of the terminal in the first cell meets the current service requirement, when the uplink rate of the terminal in the first cell does not meet the current service requirement, the base station needs to obtain the uplink rate of the terminal in the second cell, and when it is determined that the uplink rate of the terminal in the second cell meets the service requirement, the base station may send a first switching instruction for switching from the first cell to the second cell to the terminal, and a trigger instruction for triggering the terminal to perform downlink carrier aggregation of a downlink first frequency carrier and a downlink carrier of a second frequency carrier. The details of the case that the base station acquires the uplink rate of the terminal in the first cell and determines whether the uplink rate meets the current service requirement, and the case that the base station acquires the uplink rate of the terminal in the second cell and determines whether the uplink rate meets the current service requirement are not described herein again.

After receiving the first handover instruction and the trigger instruction, the terminal may perform step 602 based on the first handover instruction and perform step 603 based on the trigger instruction.

Step 602, according to the first switching instruction, the terminal is switched from the first cell to the second cell.

And after receiving the first switching instruction, the terminal switches the first cell which is resided at present to the second cell according to the received first switching instruction.

Step 603, according to the trigger instruction, the terminal performs downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the downlink second frequency.

After receiving the trigger instruction, the terminal may perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, so as to increase downlink capacity by fully utilizing the downlink spectrum resource with a lower frequency.

The terminal of the embodiment of the present invention needs to support downlink carrier aggregation, and when the terminal resides in a medium-high frequency band (e.g., 3.5GHz), and as the terminal moves to an uplink coverage weak area, the terminal can switch to a 5G network of a low frequency band (e.g., 900MHz), where the medium-high frequency band corresponds to a first frequency and the low frequency band corresponds to a second frequency. Meanwhile, the terminal can perform downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the downlink second frequency, namely downlink carrier aggregation of the carrier wave of 900MHz and the carrier wave of 3.5GHz, so that the terminal can enjoy the uplink advantage brought by 900MHz and fully utilize downlink frequency spectrum resources of medium-high frequency and low frequency.

The base station sends a first switching instruction to the terminal, and triggers the terminal to perform downlink carrier aggregation of a downlink carrier of a first frequency and a downlink carrier of a second frequency, the terminal switches according to the first switching instruction and resides in a second cell, the terminal can also perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, at the moment, the base station can transmit downlink data to the terminal through the aggregated carrier, and the terminal can receive the downlink data sent by the base station through the aggregated carrier, so that downlink spectrum resources are fully utilized.

In this embodiment of the present invention, when the uplink rate of the terminal when camped on the first cell meets the current service requirement, the method further includes:

receiving a second switching instruction which is sent by the base station and is switched from the second cell to the first cell, and a stopping instruction which is sent by the control terminal and used for stopping downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency; switching from the second cell to the first cell according to the second switching instruction; and stopping downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency according to the stop instruction.

If the base station obtains the uplink rate of the terminal when the terminal is resident in the first cell in an estimation mode and determines that the uplink rate of the terminal when the terminal is resident in the first cell can meet the current service requirement, the base station can send a second switching instruction for switching from the second cell to the first cell to the terminal, the terminal can be switched to the first cell with higher frequency according to the second switching instruction, meanwhile, the base station sends a stopping instruction for controlling the terminal to stop downlink carrier aggregation of the carrier with the first frequency and the carrier with the second frequency to the terminal, and the terminal stops downlink carrier aggregation according to the received stopping instruction, so that the situation that the rich spectrum resources of the first cell are preferentially used as much as possible can be realized.

When the base station predicts the uplink rate of the terminal when the terminal resides in the first cell, the uplink rate of the terminal when the terminal resides in the first cell can be predicted through the downlink RSRP measurement result, the uplink background noise and the congestion condition of the first cell.

The following describes the transmission method at the terminal side in detail by using a specific example, as shown in fig. 7:

step 701, the terminal resides in a first cell, and the first cell corresponds to a first frequency.

Step 702, receiving a first handover instruction sent by a base station to switch from a first cell to an adjacent second cell, and receiving a trigger instruction sent by the base station to trigger a terminal to perform downlink carrier aggregation of a carrier of a first downlink frequency and a carrier of a second downlink frequency, where the first frequency is higher than the second frequency, the first frequency is a data transmission frequency corresponding to the first cell, and the second frequency is a data transmission frequency corresponding to the second cell.

When the terminal is camped on the first cell (for example, the first frequency corresponding to the first cell may be 3.5GHz), the base station may obtain the uplink rate when the terminal is camped on the first cell. After acquiring the uplink rate of the terminal when the terminal resides in the first cell, judging whether the uplink rate of the terminal when the terminal resides in the first cell meets the current service requirement. And if not, detecting whether the uplink rate of the terminal in the second cell is greater than the uplink rate of the terminal in the first cell and meeting the current service requirement. And if so, the base station sends a first switching instruction and a triggering instruction to the terminal.

703, switching the terminal from the first cell to the second cell according to the first switching instruction; and according to the trigger instruction, the terminal carries out downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the downlink second frequency.

Step 704, receiving downlink data sent by the base station through the aggregated carrier.

Step 705, when the uplink rate of the terminal residing in the first cell meets the current service requirement, receiving a second switching instruction sent by the base station to switch from the second cell to the first cell, and a stop instruction for controlling the terminal to stop downlink carrier aggregation of the carrier of the first frequency and the carrier of the second frequency.

Step 706, switching from the second cell to the first cell according to the second switching instruction; and stopping downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency according to the stop instruction.

The overall implementation process of the transmission method at the terminal side in the embodiment of the present invention is that, when the terminal resides in the first cell (for example, the first frequency corresponding to the first cell may be 3.5GHz), the base station may obtain the uplink rate when the terminal resides in the first cell. And judging whether the uplink rate of the terminal in the first cell meets the current service requirement. If the uplink rate of the terminal in the second cell can not meet the service requirement, the terminal is triggered to be switched from the first cell to the second cell, a carrier wave of a second frequency corresponding to the second cell is configured as a main carrier wave, a carrier wave of a first frequency corresponding to the first cell is configured as an auxiliary carrier wave, and downlink carrier wave aggregation of the main carrier wave and the auxiliary carrier wave is activated. The terminal can switch to the second cell according to the trigger of the base station, and perform downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency.

When the terminal resides in the second cell, the base station can estimate the uplink rate of the terminal in the first cell, and when the uplink rate of the terminal in the first cell can meet the current service requirement, the control terminal stops the downlink carrier aggregation of the carrier wave of the first frequency and the carrier wave of the second frequency, and controls the terminal to be switched from the second cell to the first cell. The terminal can switch to the first cell according to the trigger of the base station and stop downlink carrier aggregation of the downlink carrier wave of the first frequency and the downlink carrier wave of the second frequency.

The transmission method at the terminal side in the embodiment of the invention receives a first switching instruction sent by a base station and switched from a first cell to a second cell, receives a trigger instruction sent by the base station and used for triggering the terminal to perform downlink carrier aggregation of a carrier with a first downlink frequency and a carrier with a second downlink frequency, switches to the second cell with a lower frequency according to the first switching instruction, and performs downlink carrier aggregation of the carrier with the first downlink frequency and the carrier with the second downlink frequency, so that downlink spectrum resources with the lower frequency can be fully utilized to increase downlink capacity, enhance uplink coverage performance and edge rate, and improve user experience of users.

Further, when it is determined that the uplink rate of the terminal in the first cell with higher frequency meets the service requirement, the terminal switches to the first cell and stops downlink carrier aggregation, so that the rich spectrum resources of the first cell can be preferentially used.

Another aspect of the specific embodiment of the present invention further provides a base station, as shown in fig. 8, including a processor 810 and a transceiver 820, where the transceiver 820 is configured to:

when the processor 810 determines that the uplink rate of the terminal when residing in the first cell does not meet the current service requirement and the uplink rate of the terminal when residing in the adjacent second cell meets the current service requirement, a first switching instruction for switching to the second cell is sent to the terminal, and the terminal is triggered to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency;

Preferably, the processor 810 is further configured to:

when the uplink rate of the terminal in the first cell does not meet the current service requirement, estimating the uplink rate of the terminal in the second cell;

when the uplink rate of the terminal in the second cell is greater than the uplink rate of the terminal in the first cell and meets the current service requirement, the transceiver 820 sends a first handover command for handover to the second cell to the terminal.

Preferably, the processor 810 is specifically configured to, when estimating the uplink rate of the terminal in the second cell:

Preferably, before the processor 810 determines that the uplink rate of the terminal when camped on the first cell does not satisfy the current traffic demand, it is further configured to:

acquiring an uplink rate when a terminal resides in a first cell;

judging whether the uplink rate of the terminal when the terminal resides in the first cell is greater than or equal to the uplink rate threshold corresponding to the service currently executed by the terminal;

and when the uplink rate of the terminal in the first cell is less than the uplink rate threshold corresponding to the service currently executed by the terminal, determining that the uplink rate of the terminal in the first cell does not meet the current service requirement.

Preferably, the processor 810 is specifically configured to, when acquiring the uplink rate of the terminal when the terminal is camped on the first cell:

Preferably, when the transceiver 820 triggers the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency, the method is specifically configured to:

configuring a carrier wave of a second frequency corresponding to a second cell as a main carrier wave and a carrier wave of a first frequency corresponding to a first cell as an auxiliary carrier wave;

Preferably, after the transceiver 820 triggers the terminal to perform the downlink carrier aggregation step of the downlink carrier of the first frequency and the downlink carrier of the second frequency, and when the terminal resides in the second cell, the processor 810 is further configured to:

when the current service requirement is met, the transceiver 820 sends a second switching instruction for switching from the second cell to the first cell to the terminal, and controls the terminal to stop downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency.

To sum up, when it is determined that the uplink rate of the terminal when residing in the first cell does not satisfy the current service requirement and the uplink rate of the terminal when residing in the adjacent second cell satisfies the current service requirement, the base station provided in the embodiment of the present invention sends the first switching instruction for switching to the second cell to the terminal, and triggers the terminal to perform downlink carrier aggregation of the carrier of the first frequency corresponding to the downlink first cell and the carrier of the second frequency corresponding to the second cell, so that the terminal performs cell switching, switches from the first frequency to the second frequency lower than the first frequency, and simultaneously can perform downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the second frequency, thereby fully utilizing the downlink spectrum resources with lower frequencies to increase the downlink capacity, enhance the uplink coverage performance and the edge rate, and improve the user experience of the user.

A terminal according to an embodiment of the present invention is further provided, where as shown in fig. 9, the terminal includes a transceiver 910 and a processor 920, and the transceiver 910 is configured to:

the processor 920 is configured to handover from a first cell to a second cell according to a first handover instruction; according to the trigger instruction, downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the downlink second frequency is carried out;

Preferably, when the uplink rate of the terminal when camped on the first cell meets the current traffic demand, the transceiver 910 is further configured to:

receiving a second switching instruction which is sent by the base station and is switched from the second cell to the first cell, and a stopping instruction which is sent by the control terminal and used for stopping downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency;

the processor 920 is configured to: switching from the second cell to the first cell according to the second switching instruction; and stopping downlink carrier aggregation of the carrier wave of the downlink first frequency and the carrier wave of the second frequency according to the stop instruction.

To sum up, the terminal provided in the embodiment of the present invention receives a first switching instruction sent by a base station to switch from a first cell to a second cell, and receives a trigger instruction sent by the base station to trigger the terminal to perform downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency, switches to the second cell with a lower frequency according to the first switching instruction, and performs downlink carrier aggregation of the carrier of the downlink first frequency and the carrier of the second frequency, so that a downlink spectrum resource with the lower frequency can be fully utilized to increase a downlink capacity, enhance an uplink coverage performance and an edge rate, and improve user experience of a user.

The embodiment of the invention also provides a base station, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor executes the program to implement the above-described transmission method on the base station side.

Specifically, as shown in fig. 10, the base station includes:

a processor 1010 for reading programs in the memory 1020;

a transceiver 1030 for receiving and transmitting data under the control of the processor 1010.

Where in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1010 and various circuits of memory represented by memory 1020 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1030 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations.

The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations.

Specifically, the transceiver 1030 and the processor 1010 are configured to perform specific steps of the corresponding transceiver and processor in the embodiment corresponding to fig. 8.

The embodiment of the invention also provides a terminal, which comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor; the processor implements the above-described transmission method on the terminal side when executing the program.

Specifically, as shown in fig. 11, the terminal includes:

a processor 1110 for reading programs in the memory 1120;

a transceiver 1130 for receiving and transmitting data under the control of the processor 1110; and a user interface 1140.

In fig. 11, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1110 and memory represented by memory 1120. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1130 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1110 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1110 in performing operations.

The processor 1110 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1110 in performing operations.

Specifically, the transceiver 1130 and the processor 1110 are configured to perform specific steps corresponding to the transceiver and the processor in the embodiment corresponding to fig. 9.

In addition, the specific embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the steps in the transmission method as described in any one of the above.

Specifically, the computer-readable storage medium is applied to a base station or a terminal, and when the computer-readable storage medium is applied to the base station or the terminal, the execution steps in the transmission method corresponding to the base station or the terminal are described in detail as above, which is not described herein again.

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

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

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method of transmission, comprising:

determining that the uplink rate of a terminal when the terminal is resident in a first cell does not meet the current service requirement, but if the uplink rate of the terminal when the terminal is resident in an adjacent second cell meets the current service requirement, sending a first switching instruction for switching to the second cell to the terminal, and triggering the terminal to perform downlink carrier aggregation of a carrier with a downlink first frequency and a carrier with a second frequency;

2. The transmission method according to claim 1, characterized in that the method further comprises:

3. The transmission method according to claim 2, wherein the step of estimating the uplink rate of the terminal in the second cell comprises:

4. The transmission method according to claim 1, wherein before determining that the uplink rate of the terminal when camped on the first cell does not satisfy the current traffic demand, further comprising:

5. The transmission method according to claim 4, wherein the step of obtaining the uplink rate when the terminal is camped on the first cell comprises:

6. The transmission method according to claim 1, wherein the step of triggering the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency comprises:

7. The transmission method according to claim 1, wherein after the step of triggering the terminal to perform downlink carrier aggregation for downlink carriers of the first frequency and the second frequency, and when the terminal camps on the second cell, the method further comprises:

8. A method of transmission, comprising:

9. The transmission method according to claim 8, wherein when the uplink rate of the terminal when camped on the first cell meets the current traffic demand, further comprising:

10. A base station comprising a processor and a transceiver configured to:

when the processor determines that the uplink rate of the terminal when the terminal is resident in a first cell does not meet the current service requirement, but if the uplink rate of the terminal when the terminal is resident in an adjacent second cell meets the current service requirement, a first switching instruction for switching to the second cell is sent to the terminal, and the terminal is triggered to carry out downlink carrier aggregation of a carrier of a downlink first frequency and a carrier of a second frequency;

11. The base station of claim 10, wherein the processor is further configured to:

12. The base station of claim 11, wherein the processor, when estimating the uplink rate of the terminal in the second cell, is specifically configured to:

13. The base station of claim 10, wherein the processor is further configured to, before determining that the uplink rate of the terminal while camped on the first cell does not meet the current traffic demand:

14. The base station of claim 13, wherein the processor, when obtaining the uplink rate at which the terminal is camped on the first cell, is specifically configured to:

15. The base station according to claim 10, wherein the transceiver is configured to, when triggering the terminal to perform downlink carrier aggregation of the downlink carrier of the first frequency and the downlink carrier of the second frequency:

16. The base station of claim 10, wherein after the transceiver triggers the terminal to perform the downlink carrier aggregation for the downlink carriers of the first frequency and the second frequency, and when the terminal is camped on the second cell, the processor is further configured to:

17. A terminal comprising a processor and a transceiver configured to:

18. The terminal of claim 17, wherein when the uplink rate of the terminal when camped on the first cell meets current traffic demand, the transceiver is further configured to:

19. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the steps in the transmission method according to any one of claims 1 to 7 when executing the program.

20. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the steps in the transmission method according to any one of claims 8 to 9 when executing the program.

21. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the transmission method according to one of claims 1 to 7 or the steps of the transmission method according to one of claims 8 to 9.