CN115549871A

CN115549871A - Uplink carrier switching method and device, electronic equipment and storage medium

Info

Publication number: CN115549871A
Application number: CN202110738405.5A
Authority: CN
Inventors: 陈远炫; 郭诚; 徐飞
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30

Abstract

The application relates to the technical field of wireless communication, and discloses a carrier switching method and device for an uplink, electronic equipment and a storage medium, wherein the carrier switching method for the uplink comprises the following steps: setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, wherein the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped; and switching the current scheduling of the first system carrier to the scheduling of the second system carrier in the switching interval, wherein the first system carrier is one of the carrier of the FDD system and the carrier of the TDD system, and the second system carrier is the other of the carrier of the FDD system and the carrier of the TDD system. Based on the existing protocol, the carrier needing to be scheduled can be selected according to a certain strategy and the carrier bearing the switching interval can be selected under the condition of time slot conflict.

Description

Uplink carrier switching method and device, electronic equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of wireless communication, in particular to a carrier switching method and device for an uplink, electronic equipment and a storage medium.

Background

Carrier aggregation is an important new technology, and has the basic characteristics of integrating wireless channels within and across frequency bands to improve the data transmission rate of users and reduce delay. For example, in a Long Term Evolution (LTE) system, 2 to 5 LTE component carriers (component carriers, CCs) can be aggregated together, so that a transmission bandwidth of 100MHz at maximum is realized, an uplink transmission rate and a downlink transmission rate are effectively improved, and carrier aggregation is realized; and in the 5GNR system, 16 Component Carriers (CCs) at most can be aggregated together, so that the uplink and downlink transmission rate is effectively improved, and carrier aggregation is realized. The terminal determines that at most several carriers can be simultaneously used for uplink and downlink transmission according to the capacity of the terminal.

However, the uplink multi-carrier aggregation technique is limited by the number of transmitting antennas of the terminal, and the number of streams scheduled by the base station in the uplink cannot exceed the number of transmitting antennas of the terminal, so when multiple carriers exist in the same time slot and uplink signals can be scheduled, that is, a time slot conflict occurs, a problem that the base station selects which carrier to schedule is caused. And when the transmitting antenna of the base station scheduling terminal sends signals of different carriers, the switching of the signal transmission between the carriers by the same antenna has the limitation of different time switching intervals, which also has certain influence on the selection strategy of the uplink carrier of the base station. Because the carrier that has the handoff interval is the one that has been experienced by the handoff interval, the carrier that has experienced the interval needs some special processing. It is also desirable to not extend the protocol to better accommodate existing communication protocols.

Disclosure of Invention

The embodiments of the present application mainly aim to provide a method, an apparatus, an electronic device, and a storage medium for switching carriers in an uplink, which are used to select carriers that need to be scheduled and select carriers that bear a switching interval according to a certain policy under the condition of time slot conflict based on an existing protocol.

In order to achieve the above object, an embodiment of the present application provides a method for switching carriers in an uplink, where the method includes the following steps: setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, wherein the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped; and switching the current scheduling of the first system carrier to the scheduling of the second system carrier in the switching interval, wherein the first system carrier is one of the carrier of the FDD system and the carrier of the TDD system, and the second system carrier is the other of the carrier of the FDD system and the carrier of the TDD system.

In order to achieve the above object, an embodiment of the present application further provides an uplink carrier switching apparatus, including: the device comprises a setting module, a switching module and a switching module, wherein the setting module is used for setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, and the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped; and a switching module, configured to switch, in the switching interval, a current scheduling on a first system carrier to a scheduling on a second system carrier, where the first system carrier is one of the FDD system carrier and the TDD system carrier, and the second system carrier is the other of the FDD system carrier and the TDD system carrier.

In order to achieve the above object, an embodiment of the present application further provides an electronic device, where the electronic device includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the uplink carrier switching method as described above.

To achieve the above object, an embodiment of the present application further provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the uplink carrier switching method as described above.

In the uplink carrier switching method provided in the embodiment of the present application, when there is an uplink timeslot where carriers of a frequency division duplex FDD (frequency division duplex) system and carriers of a time division duplex TDD (time division duplex) system overlap, a switching interval is set in a previous timeslot and a next timeslot of a conflict timeslot, that is, it is determined that carriers scheduled in the previous timeslot and the next timeslot of the conflict timeslot bear the switching interval, and then, switching between the carriers of the FDD system and the carriers of the TDD system is performed in the switching interval, so that a selection policy for carrier scheduling in the conflict timeslot is determined, and carriers bearing the switching interval when the carriers are switched are also determined, and meanwhile, an existing protocol does not need to be expanded, and the uplink carrier switching method has good compatibility with the existing protocol. In addition, the switching method is simple to implement, the terminal can reach the uplink peak flow through time-sharing scheduling between the two carriers, the switching is free and flexible, and the terminal can still have larger uplink flow before and after the switching.

Drawings

One or more embodiments are illustrated by the corresponding figures in the drawings, which are not meant to be limiting.

Fig. 1 is a flowchart of a carrier switching method of an uplink in an embodiment of the present invention;

fig. 2 is a schematic diagram of time slots and switching intervals in carriers of different systems involved in a carrier switching method of an uplink in another embodiment of the present invention;

fig. 3 is a flowchart of a carrier switching method for an uplink in a scenario where an FDD carrier is a primary carrier according to another embodiment of the present invention;

fig. 4 is a flowchart of a method for switching uplink carriers in a scenario where a carrier of TDD system is a primary carrier according to another embodiment of the present invention;

fig. 5 is a flowchart of an uplink carrier switching method including determining whether to perform a carrier switching step in another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an uplink carrier switching apparatus according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram of an electronic device in another embodiment of the present invention.

Detailed Description

As is apparent from the background art, in the related art, in the case where there is a collision time slot, there is no clear scheduling policy or switching method for selecting which carrier is scheduled within the collision time slot and which carrier is selected to bear the switching interval, and it is also desirable to be able to solve the above-mentioned problems based on the contents of the existing communication protocol, thereby being able to be compatible with the existing communication protocol without extending the existing protocol.

In order to solve the above problem, an embodiment of the present application provides a carrier switching method for an uplink, including the following steps: setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, wherein the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped; and switching the current scheduling of the first system carrier to the scheduling of the second system carrier in the switching interval, wherein the first system carrier is one of the carrier of the FDD system and the carrier of the TDD system, and the second system carrier is the other of the carrier of the FDD system and the carrier of the TDD system.

In the method for switching carriers of an uplink provided in the embodiment of the present application, when there is an uplink timeslot where carriers of a frequency division duplex FDD system and carriers of a time division duplex TDD system overlap, a switching interval is set in a previous timeslot and a next timeslot of a conflict timeslot, that is, a carrier scheduled in the previous timeslot and the carrier scheduled in the next timeslot of the conflict timeslot are determined to bear the switching interval, and then, switching between the carriers of the FDD system and the carriers of the TDD system is performed in the switching interval, so that a selection policy for scheduling carriers in the conflict timeslot is determined, a carrier bearing the switching interval when switching carriers is also determined, and meanwhile, an existing protocol does not need to be expanded, and the method has good compatibility with the existing protocol. In addition, the switching method is simple to implement, the terminal can reach the uplink peak flow through time-sharing scheduling between the two carriers, the switching is free and flexible, and the terminal can still have larger uplink flow before and after the switching.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the various embodiments of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.

The following describes in detail the implementation details of the uplink carrier switching method of the present embodiment with reference to fig. 1 to 5, and the following is provided only for the convenience of understanding and is not necessary for implementing the present embodiment.

Referring to fig. 1, in some embodiments, the uplink carrier switching method is applied to a terminal, and the terminal may be any electronic device supporting carrier uplink aggregation function that can access a base station, such as an electronic device like a mobile phone, a robot, and the like, and specifically includes the following steps:

step 101, setting a switching interval in a previous time slot and a next time slot of a conflict time slot, wherein the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped.

Specifically, in this embodiment, because a carrier of a Frequency Division Duplex (FDD) system can send an uplink signal in each timeslot, a carrier of a Time Division Duplex (TDD) system has periodicity when sending and receiving signals, and only a fixed number of uplink timeslots can send an uplink signal in each cycle, an uplink timeslot in which a carrier of the TDD system and a carrier of the FDD system overlap is an uplink timeslot of the carrier of the TDD system, that is, a collision timeslot is actually an uplink timeslot of the carrier of the TDD system, at this Time, a last timeslot and a next timeslot of a collision timeslot cannot schedule a carrier of the TDD system, and only a carrier of the FDD system can be scheduled, that is, a carrier of the FDD system is scheduled in the last timeslot and the next timeslot of the collision timeslot, and therefore, setting a switching interval in the last timeslot and the next timeslot of the collision timeslot is a carrier switching interval of the FDD system.

More specifically, an FDD carrier is scheduled in the last time slot of the conflict time slot, a TDD carrier is scheduled in the conflict time slot, an FDD carrier is scheduled in the next time slot of the conflict time slot, that is, two times of switching are performed, both the two times of switching are set in the time slot of the FDD carrier, that is, as shown in fig. 2, a typical case that the subcarrier spacing in the TDD carrier is twice that of the subcarrier of the FDD carrier, that is, the length of one time slot of the TDD carrier is half that of the FDD carrier is taken as an example, and at this time, the switching intervals are respectively located at the tail of the last time slot of the conflict time slot and at the head of the next time slot of the conflict time slot.

It should be noted that the switching interval indicates a period of time during which data cannot be transmitted, and in signaling, some symbols of the channel cannot be used to carry control information, and cannot be used to carry traffic data, that is, full symbols cannot be used in both the previous slot and the next slot of the collision slot, where the length of the number of non-scheduled symbols is equal to the switching interval.

Step 102, in a switching interval, switching the current scheduling on a first standard carrier to the scheduling on a second standard carrier, wherein the first standard carrier is one of a carrier of an FDD system and a carrier of a TDD system, and the second standard carrier is the other of the carrier of the FDD system and the carrier of the TDD system.

Specifically, if both the previous time slot of the conflict time slot and the next time slot of the conflict time slot are provided with the switching interval, the carrier switching is performed twice in the previous time slot of the conflict time slot and the next time slot of the conflict time slot.

More specifically, according to the analysis of step 101, the carrier of FDD system is scheduled in the last time slot of the conflict time slot, the carrier of TDD system is scheduled in the conflict time slot, the carrier of FDD system is scheduled in the next time slot of the conflict time slot, that is, the switching from the carrier of FDD system to the carrier of TDD system is completed in the tail of the last time slot of the conflict time slot, so that the carrier of TDD system is scheduled in the conflict time slot, and the switching from the carrier of FDD system to the carrier of TDD system is completed in the head of the next time slot of the conflict time slot, so that the FDD carrier is scheduled in the next time slot of the conflict time slot except for the symbol of the switching interval.

It should be noted that, in a general communication process, there are multiple conflict time slots, and at this time, two switching intervals are set and two times of switching are performed every time a conflict time slot occurs, so that the FDD scheme is scheduled back to the switching. When the current timeslot is neither the collision timeslot nor the previous timeslot and the next timeslot of the collision timeslot, the processing is performed according to the situation that the handover is not needed, which is not described herein.

It should be further noted that all uplink channels corresponding to the carriers bearing the switching interval need to be set with one switching interval. When carrier aggregation is performed, there exists a difference between a primary carrier and a secondary carrier between carriers, where the primary carrier is a carrier for carrying a Control signaling and managing other secondary carriers, that is, the secondary carrier also uses a Physical Uplink Control Channel (PUCCH) of the primary carrier to transmit the Control signaling, so that when the secondary carrier is a carrier that bears a switching interval, there is no need to set a switching interval on its PUCCH, and when the primary carrier is a carrier that bears a switching interval, it is necessary to set a switching interval on its PUCCH.

Based on the above difference, the following description will use the primary carrier as a carrier of a different system.

In some embodiments, when the carrier of the FDD scheme is a primary carrier, the carrier of the TDD scheme is a secondary carrier. Since the FDD primary carrier with the switching interval set is in the scheduled time slot, the Uplink Channel of the switching interval includes a PUCCH, a Physical Uplink Shared Channel (PUSCH), and a Sounding Reference Signal (SRS), specifically, referring to fig. 3, step 101 includes the following steps:

step 10111, reserving a switching interval in the last slot and the next slot of the collision slot on the physical uplink control channel PUCCH and the physical uplink shared channel PUSCH.

Specifically, since the Information carried on the PUCCH is mainly a User Class Identifier (UCI), and specifically includes an uplink Scheduling Request (SR), channel State Information (CSI), and Hybrid Automatic Repeat Request ACKnowledgement (HARQ-ACK/NACK), and for a terminal, after the terminal accesses the base station, the SR and CSI both monopolize a set of PUCCH resources and the terminal reports periodically, so that the two sets of PUCCH resources are configured in a time slot that does not need to undertake a switching interval; however, for AN, each uplink slot may feed back AN, and therefore, the time slot that bears the switching interval also needs to feed back AN, so that the PUCCH resource used by the AN in the conflicting time slot needs to reserve the switching interval, and the base station includes a plurality of resources with different starting symbols and symbol numbers when configuring the PUCCH resource for the terminal, and selects the corresponding PUCCH resource for the AN feedback by the base station according to the actual scheduling condition. That is, the switching interval is reserved in the last slot and the next slot of the collision slot on the Physical Uplink Control Channel (PUCCH) in step 10211, that is, SR and CSI are transmitted in other slots except the collision slot, the last slot of the collision slot, and the next slot of the collision slot; the HARQ-ACK/NACK is transmitted in other symbols except for the switching interval in the previous slot and the next slot of the collision slot, that is, the first Downlink Control Information DCI1 in the Downlink Control Information (DCI) sent by the base station is received, and the symbol positions occupied by the HARQ-ACK/NACK in the previous slot and the next slot of the collision slot are specified in DCI 1.

In one example, the typical value of the total symbol number of a time slot is 14, and assuming that the length of the switching interval is 2 symbols, the carrier of the FDD system is used as the main carrier, and the number of symbols that can be used in the last time slot of the collision time slot and the next time slot of the collision time slot is only 12. And the symbols used by the last time slot of the collision time slot are 12 symbols in total from 0 to 11, the symbols used by the next time slot of the collision time slot are 12 symbols in total from 2 to 13, and the other time slots are 14 symbols in total from 0 to 13. Therefore, according to the actual scheduling situation, the base station needs to inform the terminal of selecting the PUCCH resources with the symbols from 0 to 11 through DCI1 when the HARQ-ACK/NACK needs to be fed back in the last time slot of the conflict time slot, needs to inform the terminal of selecting the PUCCH resources with the symbols from 2 to 13 when the HARQ-ACK/NACK needs to be fed back in the next time slot of the conflict time slot, and uses the PUCCH resources with the symbols from 0 to 13 when the HARQ-ACK/NACK needs to be fed back in other uplink time slots.

Specifically, since all uplink slots in the PUSCH may need to be scheduled, otherwise, uplink traffic may be affected, and when the uplink scheduling is performed on the slot that bears the switching interval, the number of symbols bearing data needs to be subtracted by the number of symbols of the switching interval duration. Therefore, in step 10211, a switching interval is reserved in the previous slot and the next slot of the collision slot on the PUCSH, that is, the symbol position occupied by the first switching interval in the previous slot and the next slot of the collision slot of the PUSCH and the symbol position used for carrying data are determined according to the second downlink control information DCI0 in the DCI, where DCI0 is issued by the base station.

In one example, the typical value of the total symbol number of a time slot is 14, and assuming that the length of the switching interval is 2 symbols, the carrier of the FDD system is used as the main carrier, and the number of symbols which can be scheduled in the last time slot of the collision time slot and the next time slot of the collision time slot is only 12. When the base station carries out uplink scheduling in the last time slot of the conflict time slot, the base station uses DCI0 to inform the terminal to carry data on 12 symbols with the symbols of 0-11, when the base station carries out uplink scheduling in the next time slot of the conflict time slot, the base station carries data on 12 symbols with the symbols of 2-13, and when the base station carries out uplink scheduling in other uplink time slots, the base station uses 14 symbols with 0-13 to carry data.

In step 10112, the sounding reference signal SRS is transmitted in the other slots except the collision slot, the slot immediately preceding the collision slot, and the slot immediately following the collision slot.

Specifically, since the SRS only needs to occupy some symbols in a certain slot, the base station only needs to avoid the slot that needs to bear the switching interval when configuring the slot position of the SRS symbol.

It should be noted that, when the main carrier is a carrier of FDD system, in the timeslot where the carrier of FDD system and the carrier of TDD system can schedule the uplink signal, the base station schedules the carrier of TDD system and the switching interval is assumed by the carrier of FDD system, so that a larger uplink traffic can be possessed.

In some embodiments, when the carrier of the TDD scheme is a primary carrier, the carrier of the FDD scheme is a secondary carrier, and referring to fig. 4, step 101 specifically includes:

step 10121, reserving a switching interval in the last time slot and the next time slot of the collision time slot on the physical uplink shared channel PUSCH, wherein no data is transmitted in the switching interval.

Step 10122, transmitting the sounding reference signal SRS in other slots except the collision slot, the slot immediately preceding the collision slot, and the slot immediately following the collision slot.

It should be noted that, step 10121 and step 10122 are substantially the same as the corresponding contents of step 10111 and step 10112, and are not described in detail here.

It is worth mentioning that, when the TDD type carrier is the main carrier, in the time slot in which both the FDD type carrier and the TDD type carrier can schedule the uplink signal, the base station schedules the TDD type carrier and the switching interval is assumed by the FDD type carrier, so that the implementation is relatively simple, and the uplink basically has no flow loss.

Further, in some embodiments, the method further includes a step of detecting whether carrier switching is required, and specifically, referring to fig. 5, before step 101, the method further includes the following steps:

step 103, detecting whether a conflict time slot exists, if so, executing step 104, and if not, executing step 105.

It should be noted that, one premise for performing carrier switching is that a terminal accesses a base station and supports at least two uplink carriers, and the number of uplink antennas of the terminal is less than the sum of the uplink scheduling streams of all carriers, and a collision timeslot occurs only if the above conditions are met.

And 104, determining that carrier switching is required.

Step 105, determining that carrier switching is not required.

Note that, step 101 and step 102 are executed when carrier switching is performed.

In addition, it should be understood that the division of the steps of the above methods is only for clarity of description, and the implementation can be combined into one step or split some steps, and the division into multiple steps is within the scope of protection of the present patent as long as the same logical relationship is included; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.

An embodiment of the present invention relates to an uplink carrier switching apparatus, and referring to fig. 6, the apparatus includes:

the setting module 601 is configured to set a switching interval in an upper time slot and a lower time slot of a collision time slot, where the collision time slot is an uplink time slot in which a carrier of a frequency division duplex FDD system and a carrier of a time division duplex TDD system are overlapped.

A switching module 602, configured to switch, in a switching interval, a current scheduling for a carrier of a first system to a scheduling for a carrier of a second system, where the carrier of the first system is one of a carrier of an FDD system and a carrier of a TDD system, and the carrier of the second system is the other of the carrier of the FDD system and the carrier of the TDD system.

It should be understood that the present embodiment is an apparatus embodiment corresponding to the method embodiment, and the present embodiment can be implemented in cooperation with the method embodiment. The related technical details mentioned in the method embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related technical details mentioned in the present embodiment can also be applied in the method embodiment.

It should be noted that, all the modules involved in this embodiment are logic modules, and in practical application, one logic unit may be one physical unit, may also be a part of one physical unit, and may also be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, a unit which is not so closely related to solve the technical problem proposed by the present invention is not introduced in the present embodiment, but this does not indicate that no other unit exists in the present embodiment.

An embodiment of the present application further provides an electronic device, with reference to fig. 7, including: includes at least one processor 701; and, a memory 702 communicatively coupled to the at least one processor 701; the memory 702 stores instructions executable by the at least one processor 701, and the instructions are executed by the at least one processor 701 to enable the at least one processor 701 to perform the uplink carrier switching method according to any of the method embodiments described above.

The memory 702 and the processor 701 are coupled by a bus, which may include any number of interconnecting buses and bridges that couple one or more of the various circuits of the processor 701 and the memory 702 together. The bus may also connect 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. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 701 is transmitted over a wireless medium via an antenna, which receives the data and transmits the data to the processor 701.

The processor 701 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 702 may be used for storing data used by the processor 701 in performing operations.

Embodiments of the present invention also provide a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.

That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application in practice.

Claims

1. A method for uplink carrier switching, comprising:

setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, wherein the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped;

and in the switching interval, switching the current scheduling of a first system carrier to the scheduling of a second system carrier, wherein the first system carrier is one of the carrier of the FDD system and the carrier of the TDD system, and the second system carrier is the other of the carrier of the FDD system and the carrier of the TDD system.

2. The uplink carrier switching method according to claim 1, wherein when the carrier of FDD scheme is a primary carrier, setting the switching interval in a previous slot and a next slot of a collision slot includes:

reserving the switching interval in a slot previous and a slot next to the collision slot on a Physical Uplink Control Channel (PUCCH) and a Physical Uplink Shared Channel (PUSCH), wherein no data is transmitted in the switching interval.

3. The uplink carrier switching method according to claim 2, wherein the information carried on the PUCCH includes uplink Scheduling Request (SR), channel State Information (CSI) and hybrid automatic repeat request acknowledgement information (HARQ-ACK/NACK),

the reserving of the switching interval in a last slot and a next slot of the collision slot on a physical uplink control channel, PUCCH, comprises:

transmitting the SR and the CSI in other slots except the colliding slot, a last slot of the colliding slot, and a next slot of the colliding slot;

and determining the symbol positions of the HARQ-ACK/NACK in the last time slot and the next time slot of the conflict time slot according to first downlink control information DCI1, wherein the DCI1 is issued by a base station, and the symbol positions of the HARQ-ACK/NACK and the occupied symbol positions of the first switching interval are not coincident.

4. The uplink carrier switching method according to claim 1, wherein when the carrier of the TDD scheme is a primary carrier, setting a switching interval in a previous time slot and a next time slot of a conflicting time slot includes:

and reserving the switching interval in the last time slot and the next time slot of the conflict time slot of a Physical Uplink Shared Channel (PUSCH), wherein no data is transmitted in the first switching interval.

5. The uplink carrier switching method according to claim 2 or 4, wherein the reserving the switching interval in a previous slot and a next slot of the collision slot of a Physical Uplink Shared Channel (PUSCH) comprises:

and determining a symbol position occupied by the first switching interval and a symbol position used for carrying data in a last time slot and a next time slot of the conflict time slot of the PUSCH according to second downlink control information DCI0, wherein the DCI0 is issued by a base station.

6. The uplink carrier switching method according to claim 2 or 4, wherein the method further comprises:

and transmitting Sounding Reference Signals (SRS) in other time slots except the collision time slot, the time slot which is the last time slot of the collision time slot and the time slot which is the next time slot of the collision time slot.

7. The method according to claim 1, further comprising, before setting the switching interval in a time slot immediately preceding and a time slot immediately following the collision time slot:

detecting whether the conflict time slot exists;

if the conflict time slot exists, determining that carrier switching is needed;

and if the conflict time slot does not exist, determining that the carrier switching is not needed.

8. An uplink carrier switching apparatus, comprising:

the device comprises a setting module, a switching module and a switching module, wherein the setting module is used for setting a switching interval in an upper time slot and a lower time slot of a conflict time slot, and the conflict time slot is an uplink time slot in which a carrier of a Frequency Division Duplex (FDD) system and a carrier of a Time Division Duplex (TDD) system are overlapped;

and a switching module, configured to switch, in the switching interval, a current scheduling for a carrier of a first system to a scheduling for a carrier of a second system, where the carrier of the first system is one of a carrier of the FDD system and a carrier of the TDD system, and the carrier of the second system is the other of the carrier of the FDD system and the carrier of the TDD system.

9. An electronic device, comprising:

at least one processor; and (c) a second step of,

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the uplink carrier switching method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, wherein the computer program is executed by a processor to implement the uplink carrier switching method according to any one of claims 1 to 7.