CN116939829A

CN116939829A - Transmission method and related device

Info

Publication number: CN116939829A
Application number: CN202210346935.XA
Authority: CN
Inventors: 王�锋; 张旭; 彭金磷
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2023-10-24
Also published as: WO2023186127A1

Abstract

The embodiment of the application discloses a transmission method, which comprises the following steps: the terminal equipment is switched from the first carrier to the second carrier in the first switching time or from the second carrier to the first carrier in the first switching time; the first switching time is overlapped with the first overlapping time, and the first overlapping time is the overlapping time of the first time slot and the second time slot; the first time slot corresponds to a first carrier wave, and the second time slot corresponds to a second carrier wave; the first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell; the first cell and the second cell belong to different timing advance groups; the second time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all time slots corresponding to the second carrier, and the initial boundary of the second time slot is prior to the initial boundary of the third time slot; the third time slot is the first time slot after the first time slot; the terminal device does not perform uplink switching in a first time, which is a continuous time from a starting time domain position of the second time slot.

Description

Transmission method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a transmission method and a related device.

Background

In the new air interface (new radio release) protocol, the terminal device is allowed to perform uplink handover in the cells of the same timing advance group (timing advance group, TAG). In the advancing process of the new air interface protocol, the terminal equipment is further allowed to perform uplink switching in the cells of a plurality of TAGs.

At present, in the scenario of uplink switching in a cell of the same TAG, a protocol prescribes that carrier switching can be performed only once in one time slot. However, in the scenario of performing uplink handover in cells of multiple TAGs, how the terminal device performs uplink handover in one slot is a considerable problem, since the corresponding slot boundaries on the carriers of different TAGs are not completely aligned.

Disclosure of Invention

The application provides a transmission method and a related device, which are used for reducing the implementation complexity of terminal equipment.

The first aspect of the present application provides a transmission method, including:

the terminal device switches from the first carrier to the second carrier during the first switching time or from the second carrier to the first carrier during the first switching time. The first switching time is overlapped with the first overlapping time, and the first overlapping time is the overlapping time of the first time slot and the second time slot. The first time slot corresponds to a first carrier and the second time slot corresponds to the second carrier. The first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell. The first cell and the second cell belong to different timing advance groups (timing advance group, TAG). The second time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is prior to the start boundary of the third time slot. The third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot. The terminal device does not perform uplink switching in a first time, which is a continuous time from a starting time domain position of the second time slot.

In the above technical solution, the terminal device switches the first carrier to the second carrier in the first switching time, or switches the second carrier to the first carrier in the first switching time. The first switching time overlaps with an overlapping time of the first time slot and the second time slot. I.e. the terminal device performs an uplink handover on at least two carriers during a first handover time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The terminal device cannot perform an uplink handover at the first time. Therefore, the number of times of uplink switching of the terminal equipment in one time slot in the multi-TAG scene is specified, the uplink switching frequency of the terminal equipment in one time slot in the multi-TAG scene is specified, and the implementation complexity of the terminal equipment is reduced.

A second aspect of the present application provides a transmission method, including:

the network device does not schedule the terminal device to perform the first uplink transmission of the uplink switching in the first time. Wherein the first time is a continuous time from a starting time domain position of the second time slot. The second time slot corresponds to a second carrier, and the first time is located after the first switching time. The first switching time is a time when the terminal device switches from the first carrier to the second carrier or a time when the terminal device switches from the second carrier to the first carrier. The first switching time overlaps the first overlap time. The first overlap time is an overlap time of the first time slot and the second time slot. The first time slot corresponds to a first carrier and the second time slot corresponds to the second carrier. The first carrier is a carrier of a first cell, and the second carrier is a carrier of a second cell. The first cell and the second cell belong to different TAGs, the second time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is earlier than the start boundary of the third time slot. The third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot.

In the above technical solution, the network device may not schedule the first uplink transmission for uplink switching in the first time by the terminal device. Thereby avoiding the terminal equipment from carrying out uplink switching in the first time. And the first time is located after the first switching time. The first switching time is a time when the terminal device switches from the first carrier to the second carrier or a time when the terminal device switches from the second carrier to the first carrier. The first switching time overlaps the first overlap time. The first overlap time is an overlap time of the first time slot and the second time slot. Thereby avoiding the terminal device from carrying out uplink switching for a plurality of times in the second time slot, and leading the uplink switching of the terminal device to be too frequent. According to the technical scheme, the number of times of uplink switching of the terminal equipment in one time slot under the multi-TAG scene is specified, so that the uplink switching frequency of the terminal equipment in one time slot under the multi-TAG scene is specified, and the implementation complexity of the terminal equipment is reduced.

Based on the first aspect, in a first embodiment of the present application, the first switching time overlaps with a second overlapping time, where the second overlapping time is an overlapping time of the first time slot and the fourth time slot. The fourth time slot corresponds to a third carrier, and the third carrier is a carrier of a third cell. The third cell and the first cell and the second cell respectively belong to different TAGs. The fourth time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all the time slots corresponding to the third carrier, and the initial boundary of the fourth time slot is prior to the initial boundary of the third time slot; the method further comprises the steps of:

The terminal device switches from the first carrier to the third carrier in the first switching time or from the third carrier to the second carrier in the first switching time.

In this embodiment, the terminal device may also perform uplink handover on other carriers at the first handover time. For example, the terminal device may switch two radio frequency chains on the first carrier from the first carrier to the second carrier and the third carrier, respectively. Alternatively, the terminal device may switch the radio frequency chain on the first carrier from the first carrier to the second carrier and switch the radio frequency chain on the third carrier from the third carrier to the second carrier. Therefore, the terminal equipment switches among the plurality of carriers at the first switching time, the switching efficiency of the terminal equipment is improved, and the communication transmission efficiency is improved.

Based on any one of the first aspect, the second aspect, and the first implementation manner of the present application, in a second implementation manner of the present application, the length of the first time is a time slot length corresponding to a maximum subcarrier interval of at least two subcarriers, where the at least two subcarriers are carriers configured by the network device for the terminal device for uplink switching.

In this embodiment, a specific way of providing the length of the first time, which is the slot length corresponding to the largest subcarrier spacing of the at least two carriers, is provided. That is to say, the time slot length corresponding to the carrier with the largest subcarrier spacing in the multiple carriers configured by the terminal device is taken as the first time, so that the terminal device only performs uplink switching once in one time slot under the multi-TAG scene.

In a third embodiment of the present application, if the subcarrier spacing of the active partial Bandwidth (BWP) of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier, the first timeslot is timeslot p of frame n of the first carrier, the second timeslot is timeslot p+1 of frame m of the second carrier, p is an integer greater than or equal to 0 and less than or equal to a first value, the first value is equal to an integer less than or equal to the first value of the number of timeslots included in frame n or frame m, frame m is a frame where the frame start boundary is closest to the start boundary of frame n among all frames of the second carrier, and the start boundary of frame m precedes the start boundary of frame n, both n and m are integers greater than or equal to 0.

In this embodiment, another description of the positional relationship between the first slot and the second slot is provided for the case where the subcarrier spacing of the active BWP of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the third time slot, and the starting boundary of the second time slot precedes the description of the starting boundary of the third time slot.

A fourth embodiment of the present application is based on any one of the first aspect, the second aspect, the first embodiment of the present application and the second embodiment of the present applicationIn the second carrier, if the subcarrier spacing of the active partial bandwidth BWP of the first carrier is equal to the subcarrier spacing of the active partial bandwidth BWP of the second carrier multiplied by 2 ^u The first time slot is time slot (p+1) x 2 of frame n of the first carrier ^u -1, the second time slot is the time slot p+1 of the frame m, u is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a second value, the second value is equal to the integer of the number of time slots included in the frame m minus one, the frame m is the frame of which the frame start boundary is closest to the start boundary of the frame n among all the frames of the second carrier, and the start boundary of the frame m precedes the start boundary of the frame n, and n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing of the active BWP for the first carrier is equal to the subcarrier spacing of the active BWP on the second carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the third time slot, and the starting boundary of the second time slot precedes the description of the starting boundary of the third time slot.

In a fifth embodiment of the present application, based on any one of the first aspect, the second aspect, the first embodiment of the present application, and the second embodiment of the present application, if the subcarrier spacing of the activated BWP on the second carrier is equal to the subcarrier spacing of the activated BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot (p+1) x 2 of the frame m of the second carrier ^u U is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a third value, the third value is equal to an integer less than one of the number of slots included in frame n, frame m is the frame of all frames of the second carrier whose frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m precedes the start boundary of frame n, both n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing for active BWP on the second carrier is equal to the subcarrier spacing for active BWP on the first carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the third time slot, and the starting boundary of the second time slot precedes the description of the starting boundary of the third time slot.

A third aspect of the present application provides a transmission method, the method comprising:

the terminal equipment is switched from the first carrier to the second carrier in the first switching time or from the second carrier to the first carrier in the first switching time; the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of a first time slot and a second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is prior to the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot; the terminal equipment performs the first uplink switching at the second switching time, the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

In the above technical solution, the terminal device switches the first carrier to the second carrier in the first switching time, or switches the second carrier to the first carrier in the first switching time, where the first switching time overlaps with the overlapping time of the first time slot and the second time slot. I.e. the terminal device performs an uplink handover on at least two carriers during a first handover time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The terminal device may perform the first uplink handover at the second handover time. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

In a possible implementation manner, the first switching time overlaps with a second overlapping time, where the second overlapping time is an overlapping time of the first time slot and the fourth time slot, and the fourth time slot corresponds to a third carrier, and the third carrier is a carrier of a third cell, and the third cell and the first cell and the second cell belong to different TAGs; the fourth time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all the time slots corresponding to the third carrier, and the initial boundary of the fourth time slot is earlier than the initial boundary of the third time slot; the method further comprises the steps of:

In this embodiment, the terminal device may also perform uplink handover on other carriers at the first handover time. For example, the terminal device may switch two radio frequency chains on the first carrier from the first carrier to the second carrier and the third carrier, respectively. Alternatively, the terminal device may switch the radio frequency chain on the first carrier from the first carrier to the second carrier and switch the radio frequency chain on the third carrier from the third carrier to the second carrier. So that the terminal device performs a handoff between the plurality of carriers at the first handoff time. And the switching efficiency of the terminal equipment is improved, so that the communication transmission efficiency is improved.

In another possible implementation, the method further includes:

the terminal equipment receives first scheduling information from the network equipment, wherein the first scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission, and the terminal equipment triggers first uplink switching for the first uplink transmission.

In this embodiment, the terminal device may receive the first scheduling information from the network device, so as to facilitate triggering of the first uplink handover by the terminal device. Thereby facilitating the terminal device to perform the first uplink transmission.

In another possible implementation, the first switching time does not overlap with a time region of the second slot other than the first overlapping time.

In this embodiment, the first switching time falls within the first overlap time in the second slot and does not fall in other time regions of the second slot than the first overlap time. The terminal device may perform uplink switching again in other time domain symbols of the second slot. Thereby facilitating the network equipment to schedule the terminal equipment and improving the scheduling flexibility.

In another possible implementation, the method further includes:

and the terminal equipment performs second uplink switching at a third switching time, wherein the third switching time is overlapped with the first time slot, and the third switching time is before the first switching time.

In this embodiment, the terminal device may perform uplink switching again on other time domain symbols except for the first switching time in the first slot. The capability of the terminal equipment is further utilized, so that the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment allows. And the communication transmission performance is improved.

In another possible implementation, the method further includes:

the terminal equipment receives second scheduling information from the network equipment, wherein the second scheduling information is used for scheduling the terminal equipment to carry out second uplink transmission, and the terminal equipment triggers second uplink switching for the second uplink transmission.

In this embodiment, the terminal device may receive the second scheduling information from the network device, so as to facilitate triggering of the second uplink handover by the terminal device. Thereby facilitating the terminal device to perform the second uplink transmission.

In another possible implementation, a time interval between the first switching time and the second switching time is greater than or equal to the first threshold.

In this embodiment, a certain time interval is set between the first switching time and the second switching time, so as to avoid frequent switching of the terminal device, thereby reducing implementation complexity of the terminal device.

In another possible implementation manner, if the subcarrier spacing of the active BWP of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier, the first time slot is a time slot p of a frame n of the first carrier, the second time slot is a time slot p+1 of a frame m of the second carrier, p is an integer greater than or equal to 0 and less than or equal to a first value, the first value is equal to the integer of the number of time slots included in the frame n or the frame m minus one, the frame m is a frame in which the frame start boundary is closest to the start boundary of the frame n among all frames of the second carrier, and the start boundary of the frame m precedes the start boundary of the frame n, and n and m are integers greater than or equal to 0.

In another possible implementation, if the subcarrier spacing of the active partial bandwidth BWP of the first carrier is equal to the subcarrier spacing of the active partial bandwidth BWP on the second carrier multiplied by 2 ^u The first time slot is time slot (p+1) x 2 of frame n of the first carrier ^u -1, the second time slot is the time slot p+1 of the frame m, u is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a second value, the second value is equal to the integer of the number of time slots included in the frame m minus one, the frame m is the frame of which the frame start boundary is closest to the start boundary of the frame n among all the frames of the second carrier, and the start boundary of the frame m precedes the start boundary of the frame n, and n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing of the active BWP for the first carrier is equal to the subcarrier spacing of the active BWP on the second carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. The embodiment provides a first time slot and a second time slotThe description of the slots may replace the second slot, which is a slot having a start boundary closest to a start boundary of a third slot among all slots corresponding to the second carrier, where the start boundary of the second slot precedes the description of the start boundary of the third slot.

In another possible implementation, if the subcarrier spacing of the active BWP on the second carrier is equal to the subcarrier spacing of the active BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot (p+1) x 2 of the frame m of the second carrier ^u U is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a third value, the third value is equal to an integer less than one of the number of slots included in frame n, frame m is the frame of all frames of the second carrier whose frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m precedes the start boundary of frame n, both n and m are integers greater than or equal to 0.

A fourth aspect of the present application provides a transmission method, the method comprising:

the network equipment sends first scheduling information to the terminal equipment; the first scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier from the second carrier to the first carrier, the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with the start boundary closest to the start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is earlier than the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot.

In the above technical solution, the network device schedules the terminal device to perform the first uplink transmission of the first uplink handover in the second handover time. The second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, and the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier. The first switching time overlaps with a first overlapping time, which is an overlapping time of the first time slot and the second time slot. The terminal equipment can conduct the first uplink switching at the second switching time. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

In a possible implementation manner, the method further includes:

the network equipment sends second scheduling information to the terminal equipment; the second scheduling information is used for scheduling the terminal equipment to perform second uplink transmission of second uplink switching in a third switching time, the third switching time is overlapped with the first time slot, and the third switching time is before the first switching time.

In this embodiment, the network device transmits the second scheduling information to the terminal device. Thereby facilitating the terminal equipment to trigger the second uplink switching, and enabling the terminal equipment to perform the second uplink transmission. The capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved.

In this embodiment, a certain time interval is set between the first switching time and the second switching time, so as to avoid excessively frequent switching of the terminal device, thereby reducing the implementation complexity of the terminal device.

In another possible implementation, if the subcarrier spacing of the active portion bandwidth BWP of the first carrier is equal to the second carrierSubcarrier spacing of active portion bandwidth BWP on wave multiplied by 2 ^u The first time slot is time slot (p+1) x 2 of frame n of the first carrier ^u -1, the second time slot is the time slot p+1 of the frame m, u is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a second value, the second value is equal to the integer of the number of time slots included in the frame m minus one, the frame m is the frame of which the frame start boundary is closest to the start boundary of the frame n among all the frames of the second carrier, and the start boundary of the frame m precedes the start boundary of the frame n, and n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing for active BWP on the second carrier is equal to the subcarrier spacing for active BWP on the first carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. Description of the first time slot and the second time slot provided in this embodiment may be a second carrier instead of the second time slotThe starting boundary of the second time slot is prior to the description of the starting boundary of the third time slot.

A fifth aspect of the present application provides a transmission method, the method comprising:

the terminal equipment is switched from the first carrier to the second carrier in the first switching time or from the second carrier to the first carrier in the first switching time; the first switching time and the first overlapping time are not overlapped, the first switching time and the first time slot are overlapped, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is the carrier of a first cell, the second carrier is the carrier of a second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the initial boundary closest to the initial boundary of the first time slot in all time slots corresponding to the second carrier, and the initial boundary of the first time slot is prior to the initial boundary of the second time slot; the terminal equipment performs the first uplink switching at the second switching time, the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

In the above technical solution, the terminal device switches the first carrier to the second carrier in the first switching time, or switches the second carrier to the first carrier in the first switching time. The first switching time does not overlap with the first overlap time, and the first switching time overlaps with the first time slot. I.e. the terminal device performs an uplink handover on at least two carriers during a first handover time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The terminal device may perform the first uplink handover at the second handover time. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

A sixth aspect of the present application provides a transmission method, the method comprising:

the network equipment sends scheduling information to the terminal equipment; the scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier to the first carrier, the first switching time is not overlapped with the first overlapping time, the first switching time is overlapped with the first time slot, the first overlapping time is the overlapped time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot.

In the above technical solution, the network device may schedule the terminal device to perform the first uplink transmission, so that the terminal device triggers the first uplink switch for the first uplink transmission within the second switching time. The second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier, and the first switching time is not overlapped with the first overlapping time. The first switching time is overlapped with the first time slot, and the first overlapped time is the overlapped time of the first time slot and the second time slot. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

Based on the fifth aspect, in a first embodiment of the present application, before the terminal device performs the first uplink handover at the second handover time, the method further includes:

the terminal equipment receives scheduling information from the network equipment, wherein the scheduling information is used for scheduling the terminal equipment to perform first uplink transmission of first uplink switching in second switching time.

In this embodiment, the terminal device may receive the scheduling information from the network device, so as to facilitate triggering of the first uplink handover by the terminal device for the first uplink transmission. Thereby improving the flexibility of the network device for scheduling the terminal device. And the communication transmission performance is improved.

According to a second embodiment of the present application, the time interval between the first switching time and the second switching time is greater than or equal to the first threshold value.

In this embodiment, a certain time interval is set between the first switching time and the second switching time, so that switching of the terminal device is avoided from being too frequent, and implementation complexity of the terminal device is reduced.

In a third embodiment of the present application, if the subcarrier spacing of the active BWP of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier, the first time slot is the time slot p of the frame n corresponding to the first carrier, and the second time slot is the time slot p of the frame m corresponding to the second carrier; wherein p is an integer greater than or equal to 0 and less than or equal to a first value. The first value is equal to an integer less one of the number of slots comprised by frame n or frame m. Frame m is the frame whose frame start boundary is closest to the start boundary of frame n among all the frames of the second carrier, and the start boundary of frame m is later than the start boundary of frame n, both n and m being integers greater than or equal to 0.

In this embodiment, another description of the positional relationship between the first slot and the second slot is provided for the case where the subcarrier spacing of the active BWP of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot described above, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the first time slot, and the starting boundary of the first time slot precedes the description of the starting boundary of the second time slot.

According to a fourth embodiment of the present application, based on any one of the fifth aspect, the sixth aspect, and the first embodiment of the present application to the second embodiment of the present application, if the subcarrier spacing of the activated BWP of the first carrier is equal to the subcarrier spacing of the activated BWP on the second carrier multiplied by 2 ^u The first time slot is the time slot p×2 of the frame n corresponding to the first carrier ^u The second time slot is time slot p corresponding to frame m. Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a second value. The second value is equal to an integer number of slots comprised by the frame m minus one. Frame m is the frame of the second carrier in which the frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m is later than the start boundary of frame n. n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing of the active BWP for the first carrier is equal to the subcarrier spacing of the active BWP on the second carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot described above, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the first time slot, and the starting boundary of the first time slot precedes the description of the starting boundary of the second time slot.

According to a fifth embodiment of the present application, based on any one of the fifth aspect, the sixth aspect, and the first embodiment of the present application to the second embodiment of the present application, if the subcarrier spacing of the activated BWP on the second carrier is equal to the subcarrier spacing of the activated BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot p x 2 of the frame m of the second carrier ^u . Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a third value. The third value is equal to an integer number of slots comprised by frame n minus one. Frame m is the frame of the second carrier having the frame start boundary nearest to the frame n start boundary, and the frame m start boundary is later than the frame n start boundary . n and m are integers greater than or equal to 0.

In this embodiment, the subcarrier spacing for active BWP on the second carrier is equal to the subcarrier spacing for active BWP on the first carrier multiplied by 2 ^u Another way of describing the positional relationship between the first time slot and the second time slot is provided. The description of the first time slot and the second time slot provided in this embodiment may replace the second time slot described above, where the starting boundary of all the time slots corresponding to the second carrier is closest to the starting boundary of the first time slot, and the starting boundary of the first time slot precedes the description of the starting boundary of the second time slot.

A seventh aspect of the present application provides a transmission method, the method comprising:

the terminal equipment performs first uplink transmission at a first moment, the terminal equipment triggers first uplink switching for the first uplink transmission, the first moment is equal to a second moment plus the preparation time of the first uplink transmission, and the second moment is a moment before the first moment; the terminal equipment does not trigger the second uplink switching in the time interval from the second moment to the first moment; the carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is partially or completely the same as the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching.

In the above technical solution, in a time interval between the second time and the first time, the second uplink switching corresponding to the second uplink transmission is limited. But is not limited to an uplink handover in which there is no intersection with the carrier involved in the first uplink handover. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

An eighth aspect of the present application provides a transmission method, including:

the network equipment sends scheduling information to the terminal equipment, wherein the scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission of first uplink switching; the network device does not schedule the second uplink transmission of the terminal device for performing the second uplink switching in a time interval between a second time and a first time, wherein the first time is a starting time of the terminal device for performing the first uplink transmission, the first time is equal to the second time plus a preparation time of the first uplink transmission, the second time is a time before the first time, and a carrier wave of the terminal device for performing the radio frequency chain switching in the first uplink switching is partially or completely the same as a carrier wave of the terminal device for performing the radio frequency chain switching in the second uplink switching.

In the above technical solution, the network device does not schedule the terminal device to perform the second uplink transmission of the second uplink handover in the time interval between the second time and the first time. So that the terminal device does not perform the second uplink handover in the time interval between the second time and the first time. But is not limited to an uplink handover in which there is no intersection with the carrier involved in the first uplink handover. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

A ninth aspect of the present application provides a transmission method, the method comprising:

the terminal equipment performs first uplink transmission at a first moment, the terminal equipment triggers first uplink switching for the first uplink transmission, the first moment is equal to a second moment plus the preparation time of the first uplink transmission, and the second moment is a moment before the first moment; the terminal equipment triggers a second uplink switch for the second uplink transmission; the terminal equipment performs second uplink switching in a time interval from the second moment to the first moment, and the carrier wave of radio frequency chain switching performed by the terminal equipment in the first uplink switching is different from the carrier wave of radio frequency chain switching performed by the terminal equipment in the second uplink switching; and the terminal equipment performs second uplink transmission.

In the above technical solution, the terminal device performs the second uplink switching in a time interval between the second time and the first time, where the carrier of the terminal device performing the radio frequency chain switching in the first uplink switching is different from the carrier of the terminal device performing the radio frequency chain switching in the second uplink switching; and the terminal equipment performs second uplink transmission. As can be seen, the terminal device is not restricted to switch on a carrier different from the carrier involved in the first uplink switch during the preparation time for the first uplink transmission. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

In a possible implementation manner, the method further includes:

the terminal equipment sends first information to the network equipment, wherein the first information is used for indicating: and under the condition that the carrier wave of radio frequency chain switching by the terminal equipment in the first uplink switching is different from the carrier wave of radio frequency chain switching by the terminal equipment in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment.

In this embodiment, the terminal device may feed back the first information to the network device, so that the network device knows the capabilities of the terminal device. The method is beneficial to the network equipment to dispatch the terminal equipment in combination with the capability of the terminal equipment, and improves the utilization rate of time-frequency resources.

In another possible implementation, the method further includes:

the terminal equipment receives first scheduling information from the network equipment, wherein the first scheduling information is used for indicating the terminal equipment to carry out first uplink transmission; the terminal equipment receives second scheduling information from the network equipment, wherein the second scheduling information is used for indicating the terminal equipment to carry out second uplink transmission.

In this embodiment, the terminal device may receive the first scheduling information and the second scheduling information of the network device, so as to facilitate the terminal device to perform the first uplink transmission and the second uplink transmission.

A tenth aspect of the present application provides a transmission method, the method comprising:

the network equipment sends first scheduling information to the terminal equipment, wherein the first scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission of first uplink switching; the network device sends second scheduling information to the terminal device, where the second scheduling information is used to schedule the terminal device to perform second uplink transmission of second uplink switching in a time interval between a second time and a first time, the first time is a starting time of the terminal device to perform first uplink transmission, the first time is equal to the second time plus a preparation time of the first uplink transmission, the second time is a time before the first time, and a carrier of the terminal device in radio frequency chain switching in the first uplink switching is different from a carrier of the terminal device in radio frequency chain switching in the second uplink switching.

In the above technical solution, the network device sends second scheduling information to the terminal device, and the second scheduling information is used for scheduling the terminal device to perform the first uplink transmission. And triggering the second uplink transmission for the terminal equipment to perform second uplink switching in the time interval from the second moment to the first moment. It can be seen that, in the preparation time of the first uplink transmission, the network device may schedule the terminal device to perform the second uplink handover, that is, the terminal device is not limited to perform handover on carriers related to the first uplink handover by the time interval between the second time and the first time. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

In a possible implementation manner, the method further includes:

the network device receives first information from the terminal device, the first information being used to indicate: under the condition that the carrier wave of radio frequency chain switching by the terminal equipment in the first uplink switching is different from the carrier wave of radio frequency chain switching by the terminal equipment in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment; the network device sends second scheduling information to the terminal device, including: and the network equipment sends the second scheduling information to the terminal equipment according to the first information.

In this embodiment, the network device receives the first information from the terminal device so that the network device is aware of the capabilities of the terminal device. The method is beneficial to the network equipment to dispatch the terminal equipment in combination with the capability of the terminal equipment, and improves the utilization rate of time-frequency resources.

An eleventh aspect of the present application provides a terminal device, including:

a processing module, configured to switch from a first carrier to a second carrier in a first switching time, or switch from the second carrier to the first carrier in the first switching time; the first switching time is overlapped with the first overlapping time, and the first overlapping time is the overlapping time of the first time slot and the second time slot; the first time slot corresponds to a first carrier wave, and the second time slot corresponds to a second carrier wave; the first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell; the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all time slots corresponding to the second carrier wave, and the initial boundary of the second time slot is prior to the initial boundary of the third time slot; the third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot; the uplink switch is not performed within a first time, which is a continuous period of time starting from a starting time domain position of the second time slot.

A twelfth aspect of the present application provides a network device comprising:

the processing module is used for not scheduling the first uplink transmission of the uplink switching of the terminal equipment in the first time; wherein the first time is a continuous time from a starting time domain position of the second time slot; the second time slot corresponds to a second carrier wave, and the first time is positioned after the first switching time; the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier; the first switching time is overlapped with the first overlapping time; the first overlapping time is the overlapping time of the first time slot and the second time slot; the first time slot corresponds to a first carrier wave, and the second time slot corresponds to a second carrier wave; the first carrier is a carrier of a first cell, and the second carrier is a carrier of a second cell; the first cell and the second cell belong to different TAGs, the second time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all time slots corresponding to the second carrier, and the initial boundary of the second time slot is prior to the initial boundary of the third time slot; the third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot.

Based on the eleventh aspect, in a first embodiment of the present application, the first switching time overlaps with a second overlapping time, where the second overlapping time is an overlapping time of the first time slot and the fourth time slot; the fourth time slot corresponds to a third carrier, and the third carrier is a carrier of a third cell; the third cell and the first cell and the second cell respectively belong to different TAGs; the fourth time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all the time slots corresponding to the third carrier, and the initial boundary of the fourth time slot is prior to the initial boundary of the third time slot; the processing module is also used for:

switching from the first carrier to the third carrier within a first switching time, or switching from the third carrier to the second carrier within the first switching time.

In a second embodiment of the present application, the length of the first time is a time slot length corresponding to a maximum subcarrier spacing of at least two subcarriers configured by the network device for the terminal device for uplink handover.

According to a third embodiment of the present application, if the subcarrier spacing of the active BWP of the first carrier is the same as the subcarrier spacing of the active BWP of the second carrier, the first timeslot is timeslot p of frame n of the first carrier, the second timeslot is timeslot p+1 of frame m of the second carrier, p is an integer greater than or equal to 0 and less than or equal to a first value, the first value is equal to frame n or an integer less than one of the number of timeslots included in frame m, frame m is a frame where the frame start boundary is closest to the start boundary of frame n among all frames of the second carrier, and the start boundary of frame m precedes the start boundary of frame n, and n and m are integers greater than or equal to 0.

With reference to any one of the eleventh aspect, the twelfth aspect, the first embodiment of the present application and the second embodiment of the present application, in a fourth embodiment of the present application, if the subcarrier spacing of the active portion bandwidth BWP of the first carrier is equal to the subcarrier spacing of the active portion bandwidth BWP on the second carrier multiplied by 2 ^u The first time slot is time slot (p+1) x 2 of frame n of the first carrier ^u 1, the second time slot being the time slot p+1 of said frame m, u being greater than or equal to 1,and p is an integer greater than or equal to 0 and less than or equal to a second value, the second value is equal to an integer less than one of the number of time slots included in the frame m, the frame m is a frame with the frame start boundary nearest to the start boundary of the frame n in all frames of the second carrier, the start boundary of the frame m precedes the start boundary of the frame n, and n and m are integers greater than or equal to 0.

With reference to any one of the eleventh aspect, the twelfth aspect, the first embodiment of the present application, and the second embodiment of the present application, in a fifth embodiment of the present application, if the subcarrier spacing of the activated BWP on the second carrier is equal to the subcarrier spacing of the activated BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot (p+1) x 2 of the frame m of the second carrier ^u U is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a third value, the third value is equal to an integer less than one of the number of slots included in frame n, frame m is the frame of all frames of the second carrier whose frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m precedes the start boundary of frame n, both n and m are integers greater than or equal to 0.

The description of the beneficial effects shown in the eleventh aspect is shown in the first aspect, and will not be repeated. The description of the beneficial effects shown in the twelfth aspect is shown in the second aspect, and will not be repeated.

A thirteenth aspect of the present application provides a terminal device, comprising:

a processing module, configured to switch from a first carrier to a second carrier in a first switching time, or switch from the second carrier to the first carrier in the first switching time; the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of a first time slot and a second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is prior to the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot; and performing the first uplink switching at a second switching time, wherein the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

In a possible implementation manner, the first switching time overlaps with a second overlapping time, where the second overlapping time is an overlapping time of the first time slot and the fourth time slot, and the fourth time slot corresponds to a third carrier, and the third carrier is a carrier of a third cell, and the third cell and the first cell and the second cell belong to different TAGs; the fourth time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all the time slots corresponding to the third carrier, and the initial boundary of the fourth time slot is earlier than the initial boundary of the third time slot; the processing module is also used for:

In another possible implementation manner, the terminal device further includes a transceiver module;

the receiving and transmitting module is used for receiving first scheduling information from the network equipment, the first scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission, and the terminal equipment triggers first uplink switching for the first uplink transmission.

In another possible implementation, the processing module is further configured to:

and performing second uplink switching at a third switching time, wherein the third switching time is overlapped with the first time slot, and the third switching time is before the first switching time.

In another possible implementation, the transceiver module is further configured to:

and receiving second scheduling information from the network equipment, wherein the second scheduling information is used for scheduling the terminal equipment to carry out second uplink transmission, and the terminal equipment triggers second uplink switching for the second uplink transmission.

In another possible implementation, if the subcarrier spacing of the active BWP on the second carrier is equal to the subcarrier spacing of the active BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot (p+1) x 2 of the frame m of the second carrier ^u U is greater than or equal to 1, p is an integer greater than or equal to 0 and less than or equal to a third value equal to an integer less than one of the number of slots included in frame n, frame m is the frame whose start boundary is closest to the start boundary of frame n among all the frames of the second carrier, and the start boundary of frame m precedes the start boundary of frame n, both n and m are integers greater than or equal to 0 。

The description of the beneficial effects shown in the thirteenth aspect is shown in the third aspect, and will not be repeated.

A fourteenth aspect of the present application provides a network device, comprising:

the receiving and transmitting module is used for transmitting the first scheduling information to the terminal equipment; the first scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier from the second carrier to the first carrier, the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with the start boundary closest to the start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is earlier than the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot.

In a possible implementation manner, the transceiver module is further configured to:

sending second scheduling information to the terminal equipment; the second scheduling information is used for scheduling the terminal equipment to perform second uplink transmission of second uplink switching in a third switching time, the third switching time is overlapped with the first time slot, and the third switching time is before the first switching time.

The description of the beneficial effects shown in the fourteenth aspect is shown in the fourth aspect, and will not be repeated.

A fifteenth aspect of the present application provides a terminal device comprising:

a processing module, configured to switch from a first carrier to a second carrier in a first switching time, or switch from the second carrier to the first carrier in the first switching time; the first switching time and the first overlapping time are not overlapped, the first switching time and the first time slot are overlapped, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is the carrier of a first cell, the second carrier is the carrier of a second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the initial boundary closest to the initial boundary of the first time slot in all time slots corresponding to the second carrier, and the initial boundary of the first time slot is prior to the initial boundary of the second time slot; and performing the first uplink switching at a second switching time, wherein the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

A sixteenth aspect of the present application provides a network device comprising:

the receiving and transmitting module is used for sending scheduling information to the terminal equipment; the scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier to the first carrier, the first switching time is not overlapped with the first overlapping time, the first switching time is overlapped with the first time slot, the first overlapping time is the overlapped time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot.

Based on the fifteenth aspect, in a first embodiment of the present application, the terminal device further includes a transceiver module;

And the receiving and transmitting module is used for receiving scheduling information from the network equipment, wherein the scheduling information is used for scheduling the terminal equipment to perform first uplink transmission of first uplink switching in the second switching time.

With reference to any one of the fifteenth aspect, the sixteenth aspect, the first embodiment of the present application and the second embodiment of the present application, in the third embodiment of the present application, if the subcarrier spacing of the activated BWP of the first carrier is the same as the subcarrier spacing of the activated BWP of the second carrier, the first timeslot is timeslot p of frame n corresponding to the first carrier, and the second timeslot is timeslot p of frame m corresponding to the second carrier; wherein p is an integer greater than or equal to 0 and less than or equal to a first value. The first value is equal to an integer less one of the number of slots comprised by frame n or frame m. Frame m is the frame whose frame start boundary is closest to the start boundary of frame n among all the frames of the second carrier, and the start boundary of frame m is later than the start boundary of frame n, both n and m being integers greater than or equal to 0.

With reference to the fifteenth aspect, the sixteenth aspect, the first embodiment of the present application and the second embodiment of the present application, in a fourth embodiment of the present application, if the subcarrier spacing of the activated BWP of the first carrier is equal to the subcarrier spacing of the activated BWP on the second carrier multiplied by 2 ^u The first time slot is the time slot p×2 of the frame n corresponding to the first carrier ^u The second time slot is time slot p corresponding to frame m. Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a second value. The second value is equal to an integer number of slots comprised by the frame m minus one. Frame m is the frame of the second carrier in which the frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m is later than the start boundary of frame n. n and m are integers greater than or equal to 0.

Based on fifteenthIn a fifth embodiment of the present application, in any one of the first to second embodiments of the present application, if the subcarrier spacing of the activated BWP on the second carrier is equal to the subcarrier spacing of the activated BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p of the frame n of the first carrier, and the second time slot is the time slot p x 2 of the frame m of the second carrier ^u . Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a third value. The third value is equal to an integer number of slots comprised by frame n minus one. Frame m is the frame of the second carrier in which the frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m is later than the start boundary of frame n. n and m are integers greater than or equal to 0.

The description of the beneficial effects shown in the fifteenth aspect is detailed in the fifth aspect, and details are not repeated. The description of the beneficial effects shown in the sixteenth aspect is shown in the sixth aspect, and will not be repeated.

A seventeenth aspect of the present application provides a terminal device, comprising:

the processing module is used for carrying out first uplink transmission at a first moment, the terminal equipment triggers first uplink switching for the first uplink transmission, the first moment is equal to a second moment plus the preparation time of the first uplink transmission, and the second moment is a moment before the first moment; triggering no second uplink switching in the time interval from the second moment to the first moment; the carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is partially or completely the same as the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching.

An eighteenth aspect of the present application provides a network device, the network device comprising:

the receiving and transmitting module is used for sending scheduling information to the terminal equipment, wherein the scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission of first uplink switching;

the processing module is used for not scheduling the second uplink transmission of the second uplink switching of the terminal equipment in the time interval between the second moment and the first moment, wherein the first moment is the starting time of the first uplink transmission of the terminal equipment, the first moment is equal to the second moment plus the preparation time of the first uplink transmission, the second moment is the moment before the first moment, and the carrier wave of the radio frequency chain switching of the terminal equipment in the first uplink switching is partially or completely the same as the carrier wave of the radio frequency chain switching of the terminal equipment in the second uplink switching.

The description of the beneficial effects shown in the seventeenth aspect is shown in the seventh aspect, and will not be repeated. The description of the beneficial effects shown in the eighteenth aspect is shown in the eighth aspect, and details are not repeated.

A nineteenth aspect of the present application provides a terminal device, comprising:

the processing module is used for carrying out first uplink transmission at a first moment; the first moment is equal to the second moment plus the preparation time of the first uplink transmission, and the second moment is the moment before the first moment; triggering a second uplink switch for the second uplink transmission; the second uplink switching is carried out in the time interval between the second moment and the first moment, and the carrier wave of the radio frequency chain switching carried out by the terminal equipment in the first uplink switching is different from the carrier wave of the radio frequency chain switching carried out by the terminal equipment in the second uplink switching; and performing second uplink transmission.

In a possible implementation manner, the terminal device further comprises a transceiver module;

the transceiver module is used for sending first information to the network equipment, wherein the first information is used for indicating: and under the condition that the carrier wave of radio frequency chain switching by the terminal equipment in the first uplink switching is different from the carrier wave of radio frequency chain switching by the terminal equipment in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment.

the receiving and transmitting module is used for receiving first scheduling information from the network equipment, and the first scheduling information is used for indicating the terminal equipment to carry out first uplink transmission; the terminal equipment receives second scheduling information from the network equipment, wherein the second scheduling information is used for indicating the terminal equipment to carry out second uplink transmission.

A twentieth aspect of the present application provides a network device, the network device comprising:

the receiving and transmitting module is used for sending first scheduling information to the terminal equipment, wherein the first scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission of first uplink switching; and sending second scheduling information to the terminal equipment, wherein the second scheduling information is used for scheduling second uplink transmission of the terminal equipment for performing second uplink switching in a time interval between a second moment and a first moment, the first moment is the starting time of the terminal equipment for performing first uplink transmission, the first moment is equal to the second moment plus the preparation time of the first uplink transmission, the second moment is the moment before the first moment, and the carrier wave of the terminal equipment for performing radio frequency chain switching in the first uplink switching is different from the carrier wave of the terminal equipment for performing radio frequency chain switching in the second uplink switching.

receiving first information from a terminal device, the first information being used to indicate: under the condition that the carrier wave of radio frequency chain switching by the terminal equipment in the first uplink switching is different from the carrier wave of radio frequency chain switching by the terminal equipment in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment;

the transceiver module is specifically used for:

and sending the second scheduling information to the terminal equipment according to the first information.

The description of the beneficial effects shown in the nineteenth aspect is detailed in the ninth aspect, and details are not repeated. The description of the beneficial effects shown in the twentieth aspect is shown in the tenth aspect, and details thereof will not be repeated.

A twenty-first aspect of the application provides a communication device comprising a processor. The processor is configured to invoke and run a computer program stored in a memory, such that the processor implements any implementation of any of the first, third, fifth, seventh to ninth aspects.

Optionally, the communication device further comprises a transceiver; the processor is also used for controlling the transceiver to transmit and receive signals.

Optionally, the communication device comprises a memory, in which the computer program is stored.

A twenty-second aspect of the application provides a communication device comprising a processor. The processor is configured to call and run a computer program stored in a memory, such that the processor implements any one of the implementations of the second aspect, the fourth aspect, the sixth aspect, the eighth aspect to the tenth aspect.

A twenty-third aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform an implementation of any of the first to tenth aspects.

A twenty-fourth aspect of the present application provides a computer-readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform any one of the implementations as in the first to tenth aspects.

A twenty-fifth aspect of the present application provides a chip apparatus, comprising a processor, configured to be connected to a memory, and to invoke a program stored in the memory, so that the processor executes any implementation manner of the first to tenth aspects.

A twenty-sixth aspect of the present application provides a communication system comprising a terminal device as in the eleventh aspect and a network device as in the twelfth aspect; alternatively, the communication system includes a terminal device as in the thirteenth aspect and a network device as in the fourteenth aspect; alternatively, the communication system includes a terminal device as in the fifteenth aspect and a network device section as in the sixteenth aspect; alternatively, the communication system includes a terminal device as in the seventeenth aspect and a network device as in the eighteenth aspect; alternatively, the communication system comprises a terminal device as in the nineteenth aspect and a network device as in the twentieth aspect.

From the above technical solutions, the embodiment of the present application has the following advantages:

according to the technical scheme, the terminal equipment switches the first carrier to the second carrier in the first switching time or switches the second carrier to the first carrier in the first switching time; the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of a first time slot and a second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is earlier than the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot; the terminal device does not perform uplink switching in the first time, and the first time is a continuous time from the starting time domain position of the second time slot. In the technical scheme of the application, when the terminal equipment is switched from the first carrier to the second carrier in the first switching time and the first switching time is overlapped with the overlapping time of the first time slot and the second time slot, the condition that the terminal equipment cannot perform uplink switching in the first time is specified. Therefore, the number of times of uplink switching of the terminal equipment in one time slot in the multi-TAG scene is specified, the uplink switching frequency of the terminal equipment in one time slot in the multi-TAG scene is specified, and the implementation complexity of the terminal equipment is reduced.

Drawings

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

FIG. 2 is another schematic diagram of a communication system according to an embodiment of the present application;

FIG. 3 is a diagram illustrating timing advance values according to an embodiment of the present application;

fig. 4 is a schematic diagram of a scenario in which overlapping occurs between timeslots corresponding to different carriers in a multi-TAG scenario in an embodiment of the present application;

fig. 5 is a schematic diagram of a terminal device performing uplink handover on two radio frequency chains according to an embodiment of the present application;

FIG. 6 is a schematic diagram of an embodiment of a transmission method according to the present application;

fig. 7A is a schematic diagram of a scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

fig. 7B is a schematic diagram of another scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

fig. 7C is a schematic diagram of a scenario in which a first time slot and a fourth time slot overlap with the first time slot in a multi-TAG scenario according to an embodiment of the present application;

FIG. 8 is a schematic diagram of another embodiment of a transmission method according to the present application;

fig. 9A is a schematic diagram of another scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

fig. 9B is a schematic diagram of another scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

Fig. 9C is a schematic diagram of another scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

fig. 9D is a schematic diagram of another scenario in which a first time slot overlaps a second time slot in a multi-TAG scenario according to an embodiment of the present application;

FIG. 10 is a schematic diagram of another embodiment of a transmission method according to the present application;

fig. 11A is a schematic diagram of a scenario in which a first time slot and a second time slot do not overlap in a multi-TAG scenario according to an embodiment of the present application;

fig. 11B is a schematic diagram of another scenario in which the first time slot and the second time slot do not overlap in the multi-TAG scenario according to the embodiment of the present application;

fig. 11C is a schematic diagram of another scenario in which the first time slot and the second time slot do not overlap in the multi-TAG scenario according to the embodiment of the present application;

FIG. 12 is a schematic diagram of another embodiment of a transmission method according to the present application;

FIG. 13 is a schematic diagram of another embodiment of a transmission method according to the present application;

fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 15 is a schematic diagram of another structure of a communication device according to an embodiment of the present application;

fig. 16 is a schematic diagram of another configuration of a communication device according to an embodiment of the present application;

FIG. 17 is a schematic diagram of another embodiment of a communication device;

Fig. 18 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 19 is a schematic diagram of another configuration of a communication device according to an embodiment of the present application.

Detailed Description

The embodiment of the application provides a transmission method and a related device, which are used for reducing the implementation complexity of terminal equipment.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

In the description of the present application, "/" means "or" unless otherwise indicated, for example, A/B may mean A or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c; a and b; a and c; b and c; or a and b and c. Wherein a, b and c can be single or multiple.

Some technical terms related to the present application are described below.

Carrier aggregation (carrier aggregation, CA): in order to meet the requirements of single-user peak rate and system capacity improvement, the terminal device may be configured with carriers of multiple cells, and aggregate the multiple carriers together to achieve the maximum transmission bandwidth. The terminal device is configured with a plurality of cells, and the terminal device is configured with one downlink carrier and 0 to 2 uplink carriers in each cell. The terminal device may activate some cells of the plurality of cells, but some terminal devices have limited uplink capabilities, and at most, can only configure and activate two uplink carriers.

Transmit channel (Tx): may also be referred to as a Radio Frequency (RF) transmit channel, and is referred to herein simply as a transmit channel. In the present application, the transmit channels may be operated as follows, but are not limited to: the transmitting channel can receive the baseband signal from the baseband chip, perform radio frequency processing on the baseband signal to obtain a radio frequency signal, and radiate the radio frequency signal into space through the antenna. For example, the radio frequency processing may include at least one of: up-conversion processing, amplification processing, or filtering processing. Specifically, the transmit channel may include antenna switches, antenna tuners, low noise amplifiers (low noise amplifier, LNAs), power Amplifiers (PAs), mixers (mixers), local Oscillators (LOs), filters, etc., which may be integrated into one or more chips as desired. The antenna may also sometimes be considered part of the transmit channel. In the present application, the transmitting channels are simply referred to as radio frequency chains. Alternatively, in the present application, the rf chain may be replaced by Tx, an antenna, a radio frequency, a transmission channel, a transmission port, a reception channel, or any combination thereof.

In the present application, the uplink handover may be understood as Tx handover. In the present application, the switching of the terminal device from carrier a to carrier B includes: the terminal device switches at least one radio frequency chain on carrier a to carrier B. Before and after switching, the number of radio frequency chains on carrier a changes from the number of radio frequency chains on carrier B.

For example, prior to handoff, there are two radio chains on carrier a and no radio chains on carrier B. After switching, there is a radio frequency chain on carrier a and a radio frequency chain on carrier B; or after switching, there are no radio frequency chains on carrier a and two radio frequency chains on carrier B; or after the handover, there is no rf chain on carrier a, one on carrier B and another on carrier C. For another example, before switching there is one rf chain on carrier a, one rf chain on carrier B, and after switching there is no rf chain on carrier a, two rf chains on carrier B. For another example, before the handover, there is one rf chain on carrier a and no rf chain on carrier B. After switching, there is no radio frequency chain on carrier a, and one on carrier B; or after the handover, there are no rf chains on carrier a and two rf chains on carrier B, one from carrier C.

In the application, the number of radio frequency chains on the carrier supporting uplink switching is changed, and the maximum number of ports supporting uplink transmission on the carrier can be understood to be changed. The maximum port number supporting uplink transmission on the carrier is equal to the number of radio frequency chains on the carrier.

Timing Advance (TA): the terminal device receives a negative offset value between the start time of the downlink transmission and the transmission time of the uplink transmission. The sending time of the uplink transmission determined by the terminal device can be understood to control the time alignment of the uplink transmissions of different terminal devices to the network device. In particular, an important characteristic of uplink transmission is that different user equipments are orthogonal multiple access (orthogonal multiple access) in time-frequency, i.e. uplink transmissions from different terminal equipments in the same cell do not interfere with each other. To ensure orthogonality of uplink transmissions, intra-cell (intra-cell) interference is avoided, the network device requires that signals from different terminal devices of the same time domain resource (e.g. the same slot) but different frequency domain resources (e.g. different Resource Blocks (RBs)) arrive at the network device substantially aligned. The network device can correctly decode the uplink data sent by the terminal device as long as the uplink data is received within the time domain indicated by the Cyclic Prefix (CP). Thus, uplink synchronization requires that signals from different terminal devices of the same time domain resource reach the network device at times that are all within the CP. Wherein the network device can control the time of arrival of uplink data from different terminal devices at the network device by appropriately controlling the timing offset of each terminal device. For a terminal device farther from the network device, due to a larger transmission delay, the terminal device closer to the network device is required to transmit upstream data in advance.

For a network device, the network device determines the timing advance of each terminal device by measuring the uplink transmissions of the terminal device. Thus, the network device may estimate the timing advance value for the terminal device using the uplink transmission of the terminal device. The terminal device may send an uplink signal to facilitate the network device to determine the timing advance value of the terminal device. In the radio resource control (radio resource control, RRC) connected state, the timing of the uplink channel reaching the network device may change over time for reasons including: 1. the high-speed movement of the terminal equipment enables the distance between the terminal equipment and the network equipment to be changed continuously, and the transmission time delay between the terminal equipment and the network equipment to be changed continuously; 2. the crystal offset of the terminal equipment causes long-time offset accumulation, and further causes uplink timing errors; 3. a change in a switching transmission path of the terminal device; 4. doppler shift caused by movement of the terminal device. Thus, the network device needs to send dynamic signaling over time to adjust the timing advance value of the terminal device.

TAG: a set of serving cells configured by RRC signaling uses the same positioning reference cell and the same timing advance value for cells configured with uplink carriers. The timing advance group including a special cell (SpCell) is referred to as a primary timing advance group (primary timing advance group, PTAG), while the secondary timing advance group (secondary timing advance group, STAG) refers to other TAGs.

In the present application, the starting boundary of a time slot includes the starting time of the time slot or the starting time domain position occupied by the time slot when the terminal device performs uplink transmission. The starting boundary of a slot may be referred to as the time of transmission of the slot or the timing boundary of the slot, etc.

In the application, the frame start boundary includes the start time of the uplink frame or the start time domain position occupied by the frame when the terminal equipment performs uplink transmission.

The technical scheme of the application can be applied to various communication systems. For example, fifth generation mobile communication (5th generation,5G) systems, new Radio (NR) systems, long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), universal mobile communication systems (universal mobile telecommunication system, UMTS), mobile communication systems behind 5G networks (e.g., 6G mobile communication systems), internet of vehicles (vehicle to everything, V2X) communication systems, and the like.

The communication system suitable for the application comprises the terminal equipment and the network equipment, wherein the terminal equipment and the network equipment can communicate and transmit through a carrier wave.

The terminal device and the network device of the present application are described below.

The terminal device may be a wireless terminal device capable of receiving network device scheduling and indication information. The wireless terminal device may be a device that provides voice and/or data connectivity to a user, or a handheld device with wireless connectivity, or other processing device connected to a wireless modem.

A terminal device, also called a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device including a wireless communication function (providing voice/data connectivity to a user), such as a handheld device having a wireless connection function, an in-vehicle device, etc. Currently, examples of some terminal devices are: a mobile phone, a tablet, a notebook, a palm, a mobile internet device (mobile internet device, MID), a wearable device, a Virtual Reality (VR) device, an augmented reality (augmented reality, AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in the internet of vehicles, a wireless terminal in the unmanned (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in the smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city, or a wireless terminal in smart home (smart home), and the like. For example, the wireless terminal in the internet of vehicles may be a vehicle-mounted device, a whole vehicle device, a vehicle-mounted module, a vehicle, or the like. The wireless terminal in the industrial control can be a camera, a robot and the like. The wireless terminal in the smart home can be a television, an air conditioner, a floor sweeping machine, a sound box, a set top box and the like.

The network device may be a device in a wireless network. For example, a network device is a device deployed in a radio access network to provide wireless communication functionality for terminal devices. For example, the network device may be a radio access network (radio access network, RAN) node, also referred to as access network device, that accesses the terminal device to the wireless network.

Network devices include, but are not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (home evolved NodeB, or home Node B, HNB, for example), a baseband unit (BBU), an Access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be a network device in a 5G mobile communication system. For example, a next generation base station (gNB) in a new air interface (NR) system, a transmission reception point (transmission reception point, TRP), a transmission point (transmission point, TP); or one or a group (including a plurality of antenna panels) of base stations in a 5G mobile communication system; alternatively, the network device may also be a network node constituting a gNB or a transmission point. For example, a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB.

For example, a CU is responsible for handling non-real-time protocols and services, implementing the functions of the RRC layer and the packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DUs are responsible for handling physical layer protocols and real-time services, implementing the functions of the radio link control (radio link control, RLC), medium access control (media access control, MAC) and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. The information of the RRC layer may eventually become information of the PHY layer or may be converted from the information of the PHY layer. Under this architecture, higher layer signaling (e.g., RRC layer signaling) may also be considered to be sent by DUs, or by DUs and AAUs.

It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which the present application is not limited to.

The present application is mainly directed to an uplink handover scenario, so that a carrier referred to hereinafter may be understood as an uplink carrier. The present application will hereinafter refer to the uplink carrier simply as carrier.

In the present application, technical features having the same name in different embodiments may represent different meanings, and should be specifically understood in connection with the embodiment in which the technical features are specifically located. Of course, the technical solutions of different embodiments that do not contradict or logically conflict can be combined with each other, and the application is not limited.

Some possible scenarios to which the application applies are described below in connection with fig. 1 and 2.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. Referring to fig. 1, the communication system includes a network device 101, a network device 102, and a terminal device 103. The terminal device 103 is configured with two carriers, carrier 1 and carrier 2, respectively. Carrier 1 belongs to TAG1 and carrier 2 belongs to TAG2. The timing advance values adopted by the terminal equipment for uplink transmission on the two carriers are different.

Fig. 2 is another schematic diagram of a communication system according to an embodiment of the present application. Referring to fig. 2, the communication system includes a network device 201 and a terminal device 202. The network device 201 configures four carriers for the terminal device 202, carrier 1 to carrier 4 respectively. For example, carrier 1 is 4.9G (gigabit), carrier 2 is 2.6G, carrier 3 is 2.3G, and carrier 4 is 700M (mega). The terminal device may perform an uplink handover on the four carriers. The frequency band to which the carrier wave shown in fig. 2 belongs is an example, and the specific application is not limited to the frequency band to which the carrier wave belongs. For example, the frequency band to which two carriers of the four carriers belong may be replaced by 3.5G or 1.8G.

It should be noted that fig. 1 and fig. 2 are only examples. In practical applications, the communication system may further include more terminal devices and more network devices, which is not limited by the present application. The above examples are not meant to limit the application.

The following describes the uplink handover mode supported by the terminal device.

A new uplink switching mode is provided in a technical scheme, which specifically comprises: if the terminal equipment supports two carriers, the terminal equipment can perform uplink switching on the two carriers, so that the radio frequency chain utilization rate is improved.

For a terminal device supporting two carriers with two radio frequency chains and supporting uplink switching of the radio frequency chains on the two carriers, the communication protocol defines the transmission behavior of the terminal device on the two carriers by table 1 below. As shown in table 1, the two carriers include carrier 1 and carrier 2, and tx represents a radio frequency chain. Case 1 (case 1) in table 1 indicates that the terminal device has one radio frequency chain on carrier 1 and one radio frequency chain on carrier 2. Case2 (case 2) in table 1 indicates that the terminal device has no rf chains on carrier 1 and two rf chains on carrier 2. It can be seen that the terminal device supports at most one rf chain on carrier 1 and at most two rf chains on carrier 2. The terminal device may switch between such situations, i.e. one of the radio frequency chains may be switched between the two carriers. And switching between these two cases requires a switching time. The switching time may be referred to as an uplink switching time interval (uplink switching gap). The terminal device does not wish to transmit on either of the two carriers during the uplink switch time interval. The duration required by the terminal device for uplink handover is determined by the capability of the terminal device, and may be specifically reported to the network device through the capability of the terminal device. Typically, the duration required for the terminal device to perform the uplink handover is 35us (microseconds), 140us, or 210us.

TABLE 1

The other technical scheme is enhanced in two aspects based on the scheme. One aspect is the increase in the number of rf chains, the total number of rf chains does not change, but the maximum number of rf chains supported on carrier 1 varies from one to two. Namely, the situation 3 is added on the basis of the table 1, and the specific steps are shown in the table 2:

TABLE 2

On the other hand, the method is an enhancement in the number of carriers, and in the former technical scheme, the switching is supported on two carriers belonging to two different frequency bands. Another solution allows the terminal device to switch between three carriers of two bands (bands), for example carrier 1, carrier 2 and carrier 3. Wherein carrier 1 belongs to frequency band a, and carrier 2 and carrier 3 both belong to two consecutive carriers on frequency band B. Carrier 2 and carrier 3 may share the same radio frequency chain. That is, if there is one rf chain on band B, then two carriers on that rf chain are available simultaneously. If band B has two radio chains, then the two radio chains are available simultaneously on both carriers of band B.

The number of frequency bands supported by the terminal device for carrier switching is extended from two to more than two in the latest communication protocols, for example, three frequency bands or four frequency bands. The maximum number of radio chains supported by the terminal device is also two. In addition, in both the above two solutions, the terminal device is supported to perform uplink handover in the cell of the same TAG, while in the latest communication protocol, uplink handover is allowed in the cells of multiple TAGs.

The manner in which the timing advance value is determined is described below.

Fig. 3 is a schematic diagram of timing advance values according to an embodiment of the present application, referring to fig. 3, an uplink frame i of a terminal device is advanced by N with reference to a downlink frame i _TA And N _TA，offset The time of the sum can be expressed as (N) _TA +N _TA，offset )T _c 。

Wherein N is _TA And accumulating the determined timing advance value for the terminal equipment according to the timing adjustment command sent by the network side. For example, the network device may be controlled by media access control (media access control, MAC) layer control signalingThe timing advance value (also referred to as transmit timing) of the UE is adjusted. N (N) _TA，offset The offset of the uplink transmission time relative to the downlink reception time is used to determine that the terminal device has enough time to complete the switching from uplink transmission to downlink reception of the same frequency point in the time division duplex (time division duplex, TDD) mode. N (N) _TA，offset Configured by the timing advance offset (n-TimingAdvanceOffset) field of RRC signaling, the value can be 0, 25600T in particular _c Or 39936T _c . If no higher layer signaling is configured, the terminal device can determine N by adopting a predefined value of a protocol according to the duplex mode and the frequency range of the cell _TA，offset . Wherein T is _c ＝1/(Δf _max *N _f )，N _f ＝4096，Δf _max＝ 480*10 ³ Hz (hertz). N of all cells in the same TAG _TA，offset Are identical.

In the carrier aggregation scenario, the communication protocol has a requirement for a maximum transmission timing difference for the terminal device, specifically, the terminal device should be able to handle the relative transmission timing difference between the nearest slot timing boundaries of different carriers to be aggregated in carrier aggregation. The terminal device should be able to handle at least one relative transmission timing difference between all TAGs and the slot timing. In the NR system, the values of the maximum uplink transmission timing differences of the respective frequency ranges are shown in table 3. It is noted that the premise is that the terminal device is configured with a PTAG and a STAG, or with a plurality of STAGs.

TABLE 3 Table 3

Frequency range corresponding to TAG cell	Maximum uplink timing difference (us)
		FR1 (Low frequency)	34.6
FR2 (high frequency)	8.5
		Between FR1 and FR2	26.1

The communication protocol prescribes that the terminal equipment performs uplink switching at most once in one time slot, so as to avoid excessive switching of the terminal equipment in a shorter time and reduce the complexity of the terminal equipment. However, in the multi-TAG scenario, due to different timing advance values corresponding to cells of different TAGs, overlapping time slots corresponding to different carriers may occur. For example, as shown in fig. 4, the terminal device overlaps with the time slot 3 corresponding to the carrier 2 in the time slot 1 corresponding to the carrier 1, and if there is an overlap between the switching time of the uplink switching performed by the terminal device and the overlapping time of the two time slots at this time, the terminal device can perform the uplink switching again in the time slot 3 corresponding to the carrier 2. The present application provides a corresponding technical solution, and particularly please refer to the following related description of the embodiments shown in fig. 6 and fig. 8.

Note that in fig. 4, N is N corresponding to two carriers _TA，offset All 0. In practice not limited to N _TA，offset For convenience of description, the N corresponding to the carrier is set as follows _TA，offset The technical scheme of the application is described by taking 0 as an example.

Some provisions for the terminal device to perform an uplink handover on both radio frequency chains are described below.

The communication protocol specifies that if the terminal device is at T ₀ At time, an uplink transmission 1 based on uplink switch 1 is performed, then at T ₀ -T _offset After the moment the terminal does not want to cancel the uplink handover 1, or the terminal does not want to be in T for any other ₀ -T _offset Scheduled uplink transmission 2 after time, triggering any other new occurrence at T ₀ Upstream switch 2 before the moment. Wherein T is _offset Is upper partThe UE processing time (processing procedure time) for uplink transmission 1 may also be referred to as the setup time for uplink transmission 1. Uplink transmission 1 may be a reporting of an uplink physical shared channel (physical uplink shared channel, PUSCH), a sounding reference signal (sounding reference signal, SRS), or channel state information (channel state information, CSI) by a terminal device. Limiting the occurrence of upstream handover 2 at T in a communication protocol ₀ -T _offset From moment to T ₀ Between the moments, the time of starting transmission and the transmission duration of the uplink transmission 2 are not limited. I.e. as long as the uplink transmission 2 is located at T ₀ -T _offset After the moment in time. For example, the start transmission time of uplink transmission 2 may be located at T ₀ After the moment in time.

In the present application, uplink transmission based on uplink switching may be understood as that if a terminal device needs to perform the uplink transmission, an uplink switching needs to be triggered first. It may be appreciated that when the network device schedules the terminal device to perform uplink transmission on a certain carrier, if the number of radio frequency chains on the carrier by the terminal device is insufficient to support the uplink transmission, the terminal device needs to perform radio frequency chain switching, that is, the terminal device switches the radio frequency chains of other carriers onto the carrier, or the uplink switching includes the terminal device switching the radio frequency chains of other carriers onto the carrier. Thereby facilitating uplink transmission by the terminal device on the carrier.

The following describes the UE processing procedure time of uplink transmission 1 by taking PUSCH transmission in the uplink transmission 1 by a terminal device as an example. For example, the processing procedure time T of PUSCH _proc,2 Can be expressed as the following formula (1).

T _proc,2 ＝max((N ₂ +d _2,1 +d ₂ )(2048+144)*κ2 ^-μ *T _c +T _ext +T _switch ,d _2,2 ) Formula (1)

Wherein N is ₂ The value of (2) is determined according to the capability of the terminal device and the subcarrier spacing mu, which is related to the carrier on which the uplink transmission is located and the carrier on which the PDCCH for scheduling the uplink transmission is located. As shown in tables 4 and 5, table 4 is a terminal device provided with In the case of processing capability 1, N2 is taken at each subcarrier interval. Table 5 shows the value of N2 at each subcarrier interval when the terminal apparatus has processing capability 2. D if the first time domain symbol allocated to PUSCH contains only demodulation reference signals (demodulation reference signal, DMRS) _2,1 =0, otherwise d _2,1 =1. Kappa is a constant and kappa=64. If the PUSCH with the higher priority index overlaps with the PUCCH with the lower priority index, d of the PUSCH with the higher priority index ₂ Reporting the value of (d) by the terminal equipment, otherwise d ₂ ＝0。T _c ＝1/(Δf _max *N _f )，N _f ＝4096，Δf _max ＝480*10 ³ Hz (hertz). T (T) _switch The switching time of the uplink switching 1 is shown. D if partial bandwidth handover is triggered by scheduling DCI _2,2 Equal to the switch time of BWP, otherwise d _2,2 ＝0。T _ext Is associated with shared spectrum channel access.

TABLE 4 Table 4

Subcarrier spacing mu	N2
		0	10
1	12
		2	23
3	36

TABLE 5

Subcarrier spacing mu	N2
		0	5
1	5.5
		2	11(FR1)

It can be seen that when the terminal device supports switching between two frequency bands, the communication protocol is limited to the UE processing time of uplink transmission 1, and another uplink switch cannot be performed. In the pushing process of the new air interface protocol, the support terminal equipment is switched on at least three frequency bands. Therefore, if the terminal device can switch between three frequency bands or four frequency bands, the terminal device is restricted to switch over more frequency bands.

In the present application, the terminal device switches over at least two frequency bands, which can be understood as switching over carriers belonging to these at least two frequency bands. The terminal device supports one or more carriers on one frequency band, and if multiple carriers are provided, the multiple carriers may be continuous or discontinuous. The specific terminal device may report the carrier information supported by the specific terminal device (e.g., the number of supported carriers, whether the supported multiple carriers may be discontinuous, etc.) to the network device, so that the network device may conveniently configure the terminal device with one or more carriers. The frequency band in the present application may be replaced with a carrier wave belonging to the frequency band. The carrier wave in the application can be replaced by the frequency band to which the carrier wave belongs; alternatively, the carrier wave in the present application may be replaced by another carrier wave included in the frequency band to which the carrier wave belongs.

For example, as shown in fig. 5, the terminal device may perform radio link switching on four carriers, if the terminal device is at T ₀ At time 1 is to be transmitted upstream on the second carrier, then at T ₀ -T _offset From moment to T ₀ During the time instant, the terminal device will not be able to perform an uplink switch 2 on the third carrier and the fourth carrier. Uplink switch 1 is switching from the first carrier to the second carrier, while uplink switch 2 is switching from the third carrier to the fourth carrier. Although the first carrier wave is different from the fourth carrier wave, the uplink transmission 1 restricts the uplink switch 2 according to the above-mentioned rule of the communication protocol, and further restricts the uplink transmission 2, resulting in resource waste. The present application provides a corresponding technical solution, and in particular, please refer to the technical solutions of the embodiments shown in fig. 12 and fig. 13 hereinafter. Thereby realizing the capability of fully utilizing the terminal equipment and avoiding the resource waste.

In the application, the carrier belongs to a frequency band, and the terminal equipment can support at least one carrier on one frequency band. Multiple carriers of the same frequency band may share a radio frequency chain. That is, when a radio chain is available on one carrier of band B, the radio chain is available on all carriers of band B simultaneously. When two radio frequency chains are available on one carrier of band B, both radio frequency chains are available on all carriers of band B at the same time.

The technical scheme of the application is described below in connection with specific embodiments.

Fig. 6 is a schematic diagram of an embodiment of a transmission method according to the present application. Referring to fig. 6, the method includes:

601. the terminal device switches from the first carrier to the second carrier during the first switching time or from the second carrier to the first carrier during the first switching time.

Specifically, the terminal device performs uplink switching in the first switching time, so that the number of radio frequency chains on the first carrier and the second carrier before and after the first switching time is changed.

Optionally, after the first switching time, the number of radio frequency chains on the second carrier is not zero.

The first switching time overlaps with a first overlapping time, which is an overlapping time of the first time slot and the second time slot. The first time slot corresponds to a first carrier and the second time slot corresponds to a second carrier. The second time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is earlier than the start boundary of the third time slot. Or, the second time slot is a time slot with a start boundary closest to the start boundary of the third time slot in all time slots corresponding to the active BWP on the second carrier, and the start boundary of the second time slot precedes the start boundary of the third time slot. The third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot.

The first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, and the first cell and the second cell belong to different TAGs.

For example, as shown in fig. 7A, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, and the first cell and the second cell belong to different TAGs. Thus, TA1 and TA2 may not be equal. The first time slot corresponding to the first carrier and the second time slot corresponding to the second carrier are overlapped, which is specifically shown in fig. 7A as a first overlapping time. The first switching time is located on the first time slot, and the first switching time and the first overlapping time are overlapped. The second time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is earlier than the start boundary of the third time slot. It should be noted that, the starting boundary of a slot refers to the starting time domain position of the slot. As can be seen from the foregoing description, the maximum value of the first overlap time is 34.5us, and the minimum value of the first switching time is 35us, so the length of the first switching time is longer than that of the first overlap time. For example, the first switching time is located at the last time domain symbol in the first slot. The terminal equipment performs uplink switching in the first switching time, and the number of radio frequency chains on the first carrier wave and the second carrier wave is changed before and after the first switching time. The following takes an example that the terminal device supports 2 radio frequency chains to switch between carriers.

Optionally, the number of carriers on which the number of radio frequency chains changes before and after the first switching time is at least 2.

For example, the last transmission by the terminal device before the first switching time is a 2-port (port) transmission on the first carrier, and the first transmission after the first switching time is a 1-port transmission on the second carrier. The terminal device may switch one or both radio frequency chains from the first carrier to the second carrier. That is to say that before the first switching time the terminal device has two radio frequency chains on the first carrier. After the first switching time, the terminal device may be one radio frequency chain on each of the first carrier and the second carrier, or may have no radio frequency chain on the first carrier, and may be two radio frequencies on the second carrier.

For example, the last transmission by the terminal device before the first switching time is a 1-port transmission on the first carrier and a 2-port transmission is supported on the first carrier. The first transmission of the terminal device after the first switching time is a 1port transmission on the second carrier. The terminal device may switch one or both radio frequency chains from the first carrier to the second carrier. That is to say that before the first switching time the terminal device has two radio frequency chains on the first carrier. After the first switching time, the terminal device may be one radio frequency chain on each of the first carrier and the second carrier, or may have no radio frequency chain on the first carrier, and may be two radio frequencies on the second carrier.

For example, the last transmission by the terminal device before the first switching time is a 1-port transmission on the first carrier and no 2-port transmission is supported on the first carrier. The first transmission of the terminal device after the first switching time is a 2port transmission on the second carrier. The terminal device may switch one radio frequency chain from the first carrier to the second carrier. That is, before the first switching time, the terminal device has one radio frequency chain on the first carrier, and after the first switching time, the terminal device has two radio frequencies on the second carrier.

For example, the last transmission by the terminal device before the first switching time is a 2port transmission on the second carrier. The first transmission of the terminal device after the first switching time is a 1port transmission on the first carrier. The terminal device may switch one radio frequency chain from the second carrier to the first carrier. That is to say, before the first switching time, the terminal device has two radio frequency chains on the second carrier, and after the first switching time, the terminal device has one radio frequency on each of the first carrier and the second carrier.

Optionally, the first switching time also overlaps with the third time slot, i.e. the first switching time falls in the first time slot and the third time slot. For example, as shown in fig. 7B, the first switching time falls not only on the first slot but also on the third slot.

Alternatively, the above description shows the manner of describing the relationship between the first time slot and the second time slot through the third time slot, and in practical application, the relationship between the first time slot and the second time slot may also be embodied through the following description, that is, the description of the relationship between the first time slot, the second time slot and the third time slot may be replaced by the following description.

1. If the subcarrier spacing of the activated BWP of the first carrier is the same as the subcarrier spacing of the activated BWP of the second carrier, the first time slot is the time slot p corresponding to the first carrier, and the second time slot is the time slot p+1 corresponding to the second carrier.

Wherein p is an integer greater than or equal to 0 and less than or equal to a first value. The first value is equal to an integer less than one of the number of slots included in the frame to which the first slot belongs. Optionally, the starting boundary of the time slot p+1 corresponding to the first carrier is later than the starting boundary of the time slot p+1 corresponding to the second carrier. Optionally, the starting boundary of the frame to which the time slot p corresponding to the first carrier belongs is later than the starting boundary of the frame to which the time slot p+1 corresponding to the second carrier belongs.

Optionally, the first time slot is a time slot p of a frame n corresponding to the first carrier, and the second time slot is a time slot p+1 of a frame m corresponding to the second carrier.

Wherein, frame m is the frame whose frame start boundary is closest to the start boundary of frame n among all the frames of the second carrier, and the start boundary of frame m precedes the start boundary of frame n, n and m are integers greater than or equal to 0. Alternatively, m is equal to n.

2. If the subcarrier spacing of the active BWP of the first carrier is equal to the subcarrier spacing of the active BWP on the second carrier multiplied by 2 ^u The first time slot is the time slot (p+1) x 2 corresponding to the first carrier ^u -1, the second time slot being time slot p+1 corresponding to the second carrier. Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a second value. The second value is equal to an integer number of slots comprised by the frame m minus one.

Optionally, the time slot (p+1) x 2 corresponding to the first carrier ^u The starting boundary of-1 is later than the starting boundary of the corresponding time slot p +1 of the second carrier. Optionally, the time slot (p+1) x 2 corresponding to the first carrier ^u The starting boundary of the frame to which-1 belongs is later than the starting boundary of the frame to which the slot p+1 corresponding to the second carrier belongs.

Optionally, the first time slot is a time slot (p+1) x 2 of a frame n corresponding to the first carrier ^u -1, the second time slot is time slot p+1 of frame m corresponding to the second carrier.

Wherein, the frame m is the frame whose frame start boundary is closest to the start boundary of the frame n among all the frames of the second carrier, and the start boundary of the frame m precedes the start boundary of the frame n. n and m are integers greater than or equal to 0.

3. If the subcarrier spacing of the active BWP on the second carrier is equal to the subcarrier spacing of the active BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p corresponding to the first carrier, and the second time slot is the time slot (p+1) x 2 corresponding to the second carrier ^u . Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a third value. The third value is equal to an integer number of slots comprised by frame n minus one.

Optionally, the starting boundary of the time slot p corresponding to the first carrier is later than the time slot (p+1) x 2 corresponding to the second carrier ^u Is defined by the starting boundary of (c). Optionally, the frame to which the slot p corresponding to the first carrier belongs has a start boundary later than the slot (p+1) x 2 corresponding to the second carrier ^u The starting boundary of the belonging frame.

Alternatively, at first timeThe slot is the time slot p of the frame n corresponding to the first carrier, the second time slot is the time slot (p+1) x 2 of the frame m corresponding to the second carrier ^u 。

It should be noted that, in the above three descriptions, the description is presented taking an example that there is no slot offset between the frame m and the frame n. If there is a slot offset between frame m and frame n, then the slot offset between frame m and frame n should also be added to calculate the first slot and the second slot.

Optionally, the first switching time overlaps with a second overlapping time, and the second overlapping time is an overlapping time of the first time slot and the fourth time slot. The fourth time slot corresponds to a third carrier, and the third carrier is a carrier of a third cell. The third cell and the first cell and the second cell respectively belong to different TAGs. The fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all the time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot. Alternatively, the fourth time slot is a time slot having a start boundary closest to the start boundary of the third time slot among all the time slots corresponding to the activated BWP on the third carrier, and the start boundary of the fourth time slot precedes the start boundary of the third time slot.

For example, as shown in fig. 7C, the first carrier is a carrier of the first cell, the second carrier is a carrier of the second cell, and the third carrier is a carrier of the third cell. The first cell, the second cell and the third cell belong to different TAGs. Thus, TA1, TA2, and TA3 may not be equal to each other. There is an overlap between the first time slot corresponding to the first carrier and the fourth time slot corresponding to the third carrier, specifically, a second overlap time as shown in fig. 7C. The fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all the time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot.

Based on this implementation, the embodiment shown in fig. 6 optionally further comprises step 601a.

601a, the terminal device switches from the first carrier to the third carrier in a first switching time, or from the third carrier to the second carrier in the first switching time.

For example, as shown in fig. 7C, the terminal device switches from the first carrier to the second carrier and from the first carrier to the third carrier in the first switching time. For example, the last transmission by the terminal device before the first switching time is a 2port transmission on the first carrier. The first transmission of the terminal device after the first switching time is a 1port transmission on the second carrier and the third carrier, respectively. The terminal device switches the two radio frequency chains from the first carrier to the second carrier and the third carrier. That is to say, before the first switching time, the terminal device has two radio frequency chains on the first carrier, and after the first switching time, the terminal device may be one radio frequency chain on each of the second carrier and the third carrier.

For example, as shown in fig. 7C, the terminal device switches from the first carrier to the second carrier and from the third carrier to the second carrier in the first switching time. For example, the last transmission by the terminal device before the first switching time is a 1port transmission on the first carrier and a 1port transmission is supported on the third carrier. The first transmission of the terminal device after the first switching time is a 2port transmission on the second carrier. The terminal device switches the two radio frequency chains from the first carrier and the third carrier to the second carrier. That is to say, before the first switching time, the terminal device has one rf chain on each of the first carrier and the third carrier, and after the first switching time, the terminal device may have two rf chains on the second carrier.

It follows that the terminal device performs an uplink handover on at least two carriers within the first handover time. The at least two carriers include a first carrier and a second carrier. The first carrier belongs to the carrier before switching, and the second carrier belongs to the carrier after switching. Before and after the first switching time, the terminal equipment has at least two carriers of the carriers with the radio frequency chains changed. Such as the first carrier, the second carrier, and the third carrier as introduced above.

Optionally, the terminal device uses the time slot on a certain carrier as the time slot for judging one time of uplink switching, where the carrier may be configured by the network device through higher layer signaling, or indicated by the network device through MAC CE or DCI, or a carrier predefined by a protocol, or a carrier of the primary cell or a carrier of the auxiliary primary cell, or a time slot corresponding to a carrier with a largest subcarrier interval. If the number of the carriers with the largest subcarrier spacing is greater than one, the network device may select one from the carriers with the largest subcarrier spacing through higher layer signaling, MAC CE or DCI. Therefore, the problem that the time slots corresponding to carriers belonging to different TAGs are not aligned, so that the problem that one time slot is limited to be switched once and the ambiguity occurs in a multi-TAG scene can be avoided.

The network device may instruct, from the carriers configured for uplink switching by the terminal device, a time slot corresponding to one of the carriers to be a time slot for determining one uplink switching through higher layer signaling or MAC CE or DCI; or, the network device may indicate, from the carriers where uplink switching occurs, a time slot corresponding to one of the carriers as a time slot for determining one uplink switching through higher layer signaling or MAC CE or DCI.

It should be noted that, there is no fixed execution sequence between the step 601 and the step 601a, the step 601 may be executed first, and then the step 601a may be executed. Alternatively, step 601a is performed first, and then step 601 is performed. Alternatively, step 601 and step 601a are performed simultaneously according to circumstances, and the present application is not limited thereto.

602. The terminal device does not perform uplink switching in the first time.

Wherein the first time is a continuous time from a starting time domain position of the second time slot.

Optionally, the length of the first time is a slot length corresponding to a maximum subcarrier spacing of the at least two carriers.

The at least two carriers are carriers configured by the network device for the terminal device for uplink switching. The slot length corresponding to the subcarrier spacing refers to the length of one slot in the case where one carrier or BWP adopts the subcarrier spacing.

For example, the at least two carriers include a first carrier and a second carrier. Optionally, the at least two carriers further comprise a third carrier.

Optionally, the at least two carriers include carriers in which the number of radio frequency chains of the terminal device changes before and after the first switching time.

For example, the at least two carriers include a first carrier and a second carrier, and the length of the first time is equal to the time slot length corresponding to the carrier with the largest subcarrier spacing between the first carrier and the second carrier.

For example, the at least two carriers include a first carrier, a second carrier, and a third carrier, and the length of the first time is equal to the time slot length corresponding to the carrier with the largest subcarrier spacing among the first carrier, the second carrier, and the third carrier.

For example, as shown in fig. 7A, the subcarrier spacing adopted by the first carrier is equal to the subcarrier spacing adopted by the second carrier, and then the length of the first time is equal to the length of the second time slot.

For example, as shown in fig. 7C, the at least two carriers include a first carrier, a second carrier, and a third carrier. And if the subcarrier spacing adopted by the third carrier is the largest, the length of the first time is equal to the length of the fourth time slot.

It should be noted that, the terminal device not performing uplink handover in the first time includes: the terminal device does not perform any uplink handover in the first time. And the terminal device may perform an uplink handover at a time after the first time. The uplink handover may include: and the terminal equipment performs uplink switching on the configured carrier wave for uplink switching.

For example, as shown in fig. 7C, the terminal device may switch from the third carrier to the other carrier configured by the terminal device for uplink switching at a time after the first time (i.e., the network device configures the other carrier for the terminal device for uplink switching than the third carrier; e.g., the second carrier); alternatively, the terminal device may switch from the other carrier (other carrier configured by the network device for the terminal device for uplink switching than the third carrier) to the third carrier at a time after the first time. Alternatively, the terminal device may switch from the second carrier to the other carrier configured by the terminal device for uplink switching at a time subsequent to the first time.

Further, optionally, the terminal device does not perform any uplink handover in the first time slot except for a time overlapping with the first handover time.

It should be noted that if the first time slot overlaps with the second time slot and the overlapping time does not overlap with the first switching time, the terminal device may perform uplink switching on the second time slot. For example, the terminal device may switch the second carrier from the third carrier.

In a possible implementation manner, before step 602, the network device may not schedule the first uplink transmission of the terminal device for uplink handover in the first time. Based on this implementation, the embodiment shown in fig. 6 further comprises step 602a. Step 602a may be performed prior to step 602.

602a, the network device does not schedule the terminal device to perform the first uplink transmission of the uplink handover in the first time.

The network device does not schedule the first uplink transmission of the terminal device for uplink switching in the first time, which means that the network device schedules the uplink transmission of the terminal device without involving uplink switching, or that the network device schedules the uplink transmission of the terminal device without involving uplink switching in the first time, or that the network device does not schedule the uplink transmission of the terminal device in the first time.

Specifically, the network device does not schedule the terminal device to perform the first uplink transmission, so as to avoid the terminal device from performing uplink switching in the first time. Other uplink transmissions of the terminal device may still be scheduled for the network device, as long as the uplink handover triggered by the terminal device for the uplink transmission does not occur in the first time.

In another possible implementation, before step 602, the network device may schedule the terminal device to perform the first uplink transmission of the uplink handover in the first time. Based on this implementation, the embodiment shown in fig. 6 further comprises step 602b. Step 602b may be performed prior to step 602.

602b, the network device schedules the terminal device to perform the first uplink transmission of uplink switching in the first time.

In this implementation, the network device may schedule the terminal device to perform the first uplink transmission, but the terminal device may not trigger uplink handover in the first time according to the scheduling indication of the network device. The terminal device will not perform the first uplink transmission either. Specifically, the network device may send scheduling information to the terminal device, where the scheduling information is used to schedule the terminal device to perform the first uplink transmission. The scheduling information carries information of a carrier wave and/or a transmission port for indicating the terminal equipment to perform the first uplink transmission, so that the terminal equipment is indirectly indicated to perform uplink switching in the first time. The terminal equipment switches the radio frequency chain to the carrier wave through the scheduling information, so that the first uplink transmission is convenient.

In the embodiment of the application, the terminal equipment switches the first carrier wave to the second carrier wave in the first switching time or switches the second carrier wave to the first carrier wave in the first switching time; the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of a first time slot and a second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is earlier than the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot; the terminal device does not perform uplink switching in the first time, and the first time is a continuous time from the starting time domain position of the second time slot. In the technical scheme of the application, when the terminal equipment is switched to the second carrier in the first switching time or is switched to the first carrier from the second carrier in the first switching time, and the first switching time is overlapped with the overlapping time of the first time slot and the second time slot, the condition that the terminal equipment cannot perform uplink switching in the first time is specified. Therefore, the number of times of uplink switching of the terminal equipment in one time slot in the multi-TAG scene is specified, the uplink switching frequency of the terminal equipment in one time slot in the multi-TAG scene is specified, and the implementation complexity of the terminal equipment is reduced.

Fig. 8 is a schematic diagram of another embodiment of a transmission method according to the present application. Referring to fig. 8, the method includes:

801. the terminal device switches from the first carrier to the second carrier during the first switching time or from the second carrier to the first carrier during the first switching time.

Step 801 is similar to step 601 in the embodiment shown in fig. 6, and specific reference may be made to the description of step 601 in the embodiment shown in fig. 6, which is not repeated here.

Optionally, the embodiment shown in fig. 8 further includes step 801a.

801a, switching the terminal equipment from a first carrier to a third carrier in a first switching time; or switching from the third carrier to the second carrier within the first switching time.

Step 801a is similar to step 601a in the embodiment shown in fig. 6, and specific reference may be made to the description related to step 601a in the embodiment shown in fig. 6, which is not repeated here.

Optionally, the first switching time does not overlap with a time region other than the first overlapping time in the second slot. For example, as shown in fig. 9A, the first switching time is located on the first slot, and the first switching time overlaps with the first overlapping time, but does not overlap with a time region other than the first overlapping time in the second slot. The uplink switching on the next time slot is not affected when the first switching time is mostly located in the previous time slot and is slightly overlapped with the next time slot due to the fact that TAs corresponding to different carriers are different.

802. And the terminal equipment performs the first uplink switching in the second switching time.

The second switching time overlaps with the second time slot, and the second switching time does not overlap with the first switching time.

Optionally, the first uplink handover includes the terminal device performing uplink handover on a configured carrier for uplink handover.

For example, the terminal device switches from the second carrier to the first carrier. For example, the terminal device switches from the second carrier to the third carrier. For example, the terminal device switches from the third carrier to the second carrier.

For example, as shown in fig. 9A, the second switching time is located on the second timeslot, and the terminal device may perform the first uplink switching at the second switching time.

In step 802, the terminal device may perform up to one more uplink handover in the second slot.

Optionally, the second switching time also overlaps with a fourth time slot, which is the first time slot after the second time slot. I.e. the second switching time falls in the second time slot and the fourth time slot. For example, as shown in fig. 9B, the second switching time falls not only on the second slot but also on the fourth slot.

Optionally, a time interval between the first switching time and the second switching time is greater than or equal to the first threshold. For example, the first threshold may be 7 time domain symbols, 8 time domain symbols, etc. Alternatively, the magnitude of the first threshold may be determined in connection with the handover capability of the terminal device. Therefore, a certain time interval is set between the first switching time and the second switching time, so that the implementation complexity of the terminal equipment is reduced.

As can be seen from this, the communication protocol may specify that, because of the difference in TAs of the two cells of different TAGs, a first time slot corresponding to the first carrier (carrier of the first cell) overlaps with a second time slot corresponding to the second carrier (carrier of the second cell), and if there is an overlap between a first switching time when the terminal device performs an uplink switching and an overlapping time of the first time slot and the second time slot, the number of switching times corresponding to each of the first time slot and the second time slot cannot exceed two times. In other words, in the case where the first switching time overlaps with the first overlapping time, the terminal device may perform uplink switching at most once on the second slot in addition to the first uplink switching. Therefore, the network equipment can schedule the terminal equipment more flexibly.

Optionally, the embodiment shown in fig. 8 further includes step 802a, and step 802a may be performed before step 802.

802a, the network device sends first scheduling information to the terminal device. Correspondingly, the terminal device receives the first scheduling information from the network device.

The first scheduling information is used for scheduling the terminal equipment to perform first uplink transmission. The terminal device triggers a first uplink handover for the first uplink transmission.

Specifically, the first scheduling information may be first DCI, where the first DCI is used to schedule the terminal device to perform the first uplink transmission. The first DCI also carries information for instructing the terminal device to perform a carrier and/or a transmission port used for the first uplink transmission. The terminal device may trigger the first uplink handover for the first uplink transmission through the first DCI (that is, switch the radio frequency chain to a carrier adopted by the terminal device to perform the first uplink transmission), so that the terminal device is convenient to perform the first uplink transmission.

Optionally, the embodiment shown in fig. 8 further includes step 803, and step 803 may be performed after step 801.

803. And the terminal equipment performs the second uplink switching at the third switching time.

The third switching time overlaps the first time slot, and the third switching time precedes the first switching time.

Optionally, the second uplink handover includes the terminal device performing uplink handover on a configured carrier for uplink handover. For example, the terminal device will switch from the other carrier to the first carrier. For example, the terminal device will switch from the second carrier to the first carrier. For example switching the radio frequency chain from the third carrier to the first carrier.

For example, as shown in fig. 9C, the third switching time is located on the first timeslot, and the terminal device performs the second uplink switching at the third switching time.

Optionally, the third switching time also overlaps with a fifth time slot, which is a time slot preceding the first time slot. For example, as shown in fig. 9D, the third switching time falls not only on the first slot but also on the fifth slot.

Optionally, a time interval between the first switching time and the third switching time is greater than or equal to the first threshold. For the first threshold, refer to the related description above. Therefore, a certain time interval is set between the first switching time and the third switching time, so that the implementation complexity of the terminal equipment is reduced.

In step 803, the terminal device may perform uplink handover at most once more on the first timeslot. Therefore, when the last time domain symbol of the first time slot overlaps with the first time domain symbol of the third time slot and the first switching time overlaps with the overlapping time between the first time slot and the second time slot, other time domain symbols except the first switching time on the first time slot and the third time slot can be switched up at most once.

Optionally, the embodiment shown in fig. 8 further comprises step 803a. Step 803a may be performed prior to step 803.

803a, the network device sends the second scheduling information to the terminal device. Correspondingly, the terminal device receives the second scheduling information from the network device.

The second scheduling information is used for scheduling the terminal equipment to perform second uplink transmission. The terminal device triggers a second uplink handover for the second uplink transmission.

Specifically, the second scheduling information may be a second DCI, where the second DCI is used to schedule the terminal device to perform a second uplink transmission. The second DCI also carries carrier information for instructing the terminal device to perform the second uplink transmission. The terminal device may trigger the second uplink handover for the second uplink transmission through the second DCI (that is, switch the radio frequency chain to a carrier adopted by the terminal device to perform the second uplink transmission), so as to facilitate the terminal device to perform the second uplink transmission.

Optionally, the embodiment shown in fig. 8 further includes step 804. Step 804 may be performed after step 802.

804. And the terminal equipment performs first uplink transmission.

Optionally, the embodiment shown in fig. 8 further comprises step 805. Step 805 may follow step 803.

805. And the terminal equipment performs second uplink transmission.

In the embodiment of the application, the terminal equipment is switched from the first carrier to the second carrier in the first switching time or is switched from the second carrier to the first carrier in the first switching time. Wherein the first switching time overlaps the first overlap time. The first overlap time is an overlap time of the first time slot and the second time slot. The first time slot corresponds to the first carrier and the second time slot corresponds to the second carrier. The first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, the first cell and the second cell belong to different TAGs, the second time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is earlier than the start boundary of the third time slot. The third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot. The terminal equipment performs the first uplink switching at the second switching time, the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time. In the technical scheme of the application, when the terminal equipment is switched from the first carrier to the second carrier in the first switching time and the first switching time is overlapped with the overlapping time of the first time slot and the second time slot, the terminal equipment is specified to be capable of performing the first uplink switching in the second switching time. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

The technical scheme provided by the application is described below with reference to fig. 10 for another scenario under the multi-TAG scenario. Fig. 10 is a schematic diagram of another embodiment of a transmission method according to the present application. Referring to fig. 10, the method includes:

1001. the terminal device switches from the first carrier to the second carrier during the first switching time or from the second carrier to the first carrier during the first switching time.

The first switching time does not overlap with the first overlap time. The first switching time overlaps with the first time slot. The first overlap time is an overlap time of the first time slot and the second time slot. The first time slot corresponds to a first carrier and the second time slot corresponds to a second carrier. The first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell. The first cell and the second cell belong to different TAGs.

The second time slot is the time slot with the start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot. Or, the second time slot is a time slot with a start boundary closest to the start boundary of the first time slot among all time slots corresponding to the active BWP on the second carrier, and the start boundary of the first time slot precedes the start boundary of the second time slot.

For example, as shown in fig. 11A, the first carrier is a carrier of a first cell, and the second carrier is a carrier of a second cell. The first cell and the second cell belong to different TAGs. Thus, TA1 and TA2 may not be equal. The terminal device switches from the first carrier to the second carrier at a first switching time or from the second carrier to the first carrier within the first switching time. The first switching time falls on the first time slot but does not overlap the second time slot.

Optionally, the above describes a way of illustrating the positional relationship between the first time slot and the second time slot. In practical applications, the positional relationship between the first time slot and the second time slot may also be represented as described below. That is, the above description about the positional relationship between the first slot and the second slot may be replaced with the following description.

1. If the subcarrier spacing of the activated BWP of the first carrier is the same as the subcarrier spacing of the activated BWP of the second carrier, the first time slot is the time slot p corresponding to the first carrier, and the second time slot is the time slot p corresponding to the second carrier.

Wherein p is an integer greater than or equal to 0 and less than or equal to a first value. The first value is equal to an integer less one of the number of slots comprised by frame n or frame m.

Optionally, the starting boundary of the time slot p corresponding to the first carrier precedes the starting boundary of the time slot p corresponding to the second carrier. Optionally, the frame start boundary to which the timeslot p corresponding to the first carrier belongs precedes the frame start boundary to which the timeslot p corresponding to the second carrier belongs.

Optionally, the first time slot is a time slot p of a frame n corresponding to the first carrier, and the second time slot is a time slot p of a frame m corresponding to the second carrier.

Frame m is the frame whose frame start boundary is closest to the start boundary of frame n among all the frames of the second carrier, and the start boundary of frame m is later than the start boundary of frame n, both n and m being integers greater than or equal to 0. Alternatively, m is equal to n.

2. If the subcarrier spacing of the active BWP of the first carrier is equal to the subcarrier spacing of the active BWP on the second carrier multiplied by 2 ^u The first time slot is the time slot p 2 corresponding to the first carrier ^u The second time slot is a time slot p corresponding to the second carrier.

Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a second value. The second value is equal to an integer number of slots comprised by the frame m minus one.

Optionally, the time slot p×2 corresponding to the first carrier ^u The start boundary of the time slot p corresponding to the second carrier is preceded by the start boundary of the time slot p corresponding to the second carrier. Optionally, the time slot p×2 corresponding to the first carrier ^u The start boundary of the frame is earlier than the start boundary of the frame to which the time slot p corresponding to the second carrier belongs.

Optionally, the first time slot is a time slot p×2 of a frame n corresponding to the first carrier ^u The second time slot is time slot p corresponding to frame m.

Frame m is the frame of the second carrier in which the frame start boundary is closest to the start boundary of frame n, and the start boundary of frame m is later than the start boundary of frame n. n and m are integers greater than or equal to 0.

3. If the subcarrier spacing of the active BWP on the second carrier is equal to the subcarrier spacing of the active BWP on the first carrier multiplied by 2 ^u The first time slot is the time slot p corresponding to the first carrier, and the second time slot is the time slot p x 2 corresponding to the second carrier ^u 。

Wherein u is greater than or equal to 1, and p is an integer greater than or equal to 0 and less than or equal to a third value. The third value is equal to an integer number of slots comprised by frame n minus one.

Optionally, the starting boundary of the time slot p corresponding to the first carrier is earlier than the time slot p×2 corresponding to the second carrier ^u Is defined by the starting boundary of (c). Optionally, the start boundary of the frame to which the time slot p corresponding to the first carrier belongs precedes the time slot p×2 corresponding to the second carrier ^u The starting boundary of the belonging frame.

Optionally, the first time slot is a time slot p of a frame n of the first carrier, and the second time slot is a time slot p×2 of a frame m of the second carrier ^u 。

It should be noted that, in the above three descriptions, the description is presented taking an example that there is no slot offset between the frame m and the frame n. If there is a slot offset between frame m and frame n, then the slot offset between frame m and frame n should also be added to calculate the first slot and the second slot. The starting boundary of a frame refers to the starting time of an uplink frame or the starting time domain position occupied by the frame when the terminal equipment performs uplink transmission.

Optionally, the first switching time also overlaps with the third time slot. The third slot is the slot preceding the first slot. For example, as shown in fig. 11B, the first switching time falls not only on the first slot but also on the third slot.

1002. And the terminal equipment performs the first uplink switching in the second switching time.

For example, as shown in fig. 11A, the second switching time is located on the second timeslot, and the terminal device may perform the first uplink switching at the second switching time.

Optionally, a time interval between the first switching time and the second switching time is greater than or equal to the first threshold. For example, the first threshold is 7 time domain symbols in length, or 8 time domain symbols in length. Alternatively, the first threshold may be determined in connection with the capabilities of the terminal device. Therefore, a certain time interval is set between the first switching time and the second switching time, so that the implementation complexity of the terminal equipment is reduced.

Optionally, the second switching time also overlaps with the fourth time slot. The fourth time slot is the first time slot after the second time slot. For example, as shown in fig. 11C, the second switching time falls not only on the second slot but also on the fourth slot.

Optionally, the embodiment shown in fig. 10 further comprises step 1002a. Step 1002a may be performed prior to step 1002.

1002a, the network device sends scheduling information to the terminal device. Correspondingly, the terminal device receives the scheduling information from the network device.

The scheduling information is used for scheduling the terminal equipment to perform the first uplink transmission of the first uplink handover in the second handover time. The scheduling information carries information of a carrier wave and/or a transmission port for indicating the terminal equipment to perform the first uplink transmission, so that the terminal equipment is indirectly indicated to perform the first uplink switching in the second switching time. The terminal equipment switches the radio frequency chain to the carrier wave through the scheduling information, so that the first uplink transmission is convenient.

Optionally, the embodiment shown in fig. 10 further comprises step 1003. Step 1003 may be performed after step 1002.

1003. And the terminal equipment performs first uplink transmission.

In the embodiment of the application, the terminal equipment is switched from the first carrier to the second carrier in the first switching time or is switched from the second carrier to the first carrier in the first switching time. The first switching time does not overlap with the first overlap time. The first switching time overlaps with the first time slot. The first overlap time is an overlap time of the first time slot and the second time slot. The first time slot corresponds to a first carrier and the second time slot corresponds to a second carrier. The first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell. The first cell and the second cell belong to different TAGs. The second time slot is the time slot with the start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot. And the terminal equipment performs the first uplink switching in the second switching time. The second switching time overlaps with the second time slot, and the second switching time does not overlap with the first switching time. In the technical scheme of the application, when the terminal equipment is switched from the first carrier to the second carrier in the first switching time and the overlapping time of the first switching time and the second time slot is not overlapped, the terminal equipment is specified to be capable of performing the first uplink switching in the second switching time. Therefore, the capability of the terminal equipment is fully utilized, and the flexibility of the network equipment for scheduling the terminal equipment is improved under the condition that the capability of the terminal equipment is allowed. And the communication transmission performance is improved.

The following embodiments shown in fig. 12 and 13 provide for uplink handover that can be performed for the terminal device in the preparation time for the first uplink transmission, so as to avoid resource waste.

Fig. 12 is a schematic diagram of another embodiment of a transmission method according to the present application. Referring to fig. 12, the method includes:

1201. and the terminal equipment performs first uplink transmission at a first moment.

The first time is equal to the second time plus the preparation time for the first uplink transmission. For the preparation time of the first uplink transmission, refer to the related description above. The second time is a time before the first time.

For example, as shown in fig. 5, the terminal device performs the first uplink transmission on the second carrier at time T0.

Optionally, the embodiment shown in fig. 12 further includes step 1201a. Step 1201a may be performed before step 1201.

1201a, the network device sends scheduling information to the terminal device. Correspondingly, the terminal device receives the scheduling information from the network device.

The scheduling information is used for scheduling the terminal equipment to perform first uplink transmission. The terminal device triggers a first uplink handover for the first uplink transmission. The scheduling information also carries information for indicating the carrier and/or the transmission port of the terminal device for the first uplink transmission. The scheduling information indicates that the carrier wave of the terminal equipment for performing the first uplink transmission is a second carrier wave. The terminal device may switch the radio frequency chain from the first carrier to the second carrier, thereby facilitating the terminal device to perform the first uplink transmission on the second carrier.

For example, as shown in fig. 5, the terminal device may switch the radio frequency chain on the first carrier from the first carrier to the second carrier.

The carrier on which the terminal device performs radio frequency link switching in the first uplink switching may be referred to as a carrier related to the first uplink transmission. The carrier wave for the terminal equipment to switch the radio frequency chain in the first uplink switching comprises a first carrier wave and a second carrier wave, and specifically, the terminal equipment switches the radio frequency chain from the first carrier wave to the second carrier wave. The first carrier may be a carrier of a radio frequency chain that provides the second carrier with the first uplink transmission. Or the second carrier is a carrier related to the first carrier configured by higher layer parameter higher layer signaling (e.g., DCI, media access control element (media access control control element, MAC CE)), or the second carrier is a carrier related to the first carrier reported by the terminal device.

1202. The network device does not schedule the terminal device for the second uplink transmission.

Specifically, the network device does not schedule the terminal device to perform the second uplink transmission. In this way, the terminal device does not trigger the second uplink handover in the time interval between the second time and the first time for the second uplink transmission. The second uplink switching may be understood as switching the radio frequency chain to a carrier adopted by the terminal device for performing the second uplink transmission by the terminal device. That is, the second uplink handover is an uplink handover triggered by the terminal device for performing the second uplink transmission.

The network equipment does not schedule the terminal equipment to carry out second uplink transmission, which means that the uplink transmission of the network equipment scheduling terminal equipment does not involve uplink switching; or the network equipment schedules the uplink switching related to the uplink transmission of the terminal equipment not to be carried out in the time interval from the second moment to the first moment; or the network equipment schedules the uplink switching related to the uplink transmission of the terminal equipment to be carried out in the time interval from the second moment to the first moment, and the carrier related to the uplink switching is completely different from the carrier related to the first uplink switching; or, the uplink switching related to the uplink transmission of the network device scheduling terminal device is performed in a time interval between the second time and the first time, and the carrier related to the uplink switching related to the uplink transmission of the network device scheduling terminal device does not include the carrier adopted by the first uplink transmission.

The carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is partially or completely the same as the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching. Alternatively, the carriers involved in the first uplink handover are partially or wholly identical to the carriers involved in the second uplink handover.

Alternatively, the starting transmission time of the second uplink transmission may occur before the first time, or after the first time, which is not limited in the present application.

The carrier on which the terminal device performs radio frequency link switching in the second uplink switching may be referred to as a carrier related to the second uplink transmission. For example, the carrier for radio frequency chain switching by the terminal device in the second uplink switching includes the first carrier and/or the second carrier.

For example, in the second uplink handover, the terminal device performs radio frequency link handover between the second carrier and the third carrier.

1203. And the terminal equipment does not trigger the second uplink switching in the time interval from the second moment to the first moment.

For example, as shown in fig. 5, the terminal device is at T ₀ And carrying out first uplink transmission on the second carrier at the moment. In order to support the first uplink transmission, the terminal device needs to switch the radio frequency chain on the first carrier from the first carrier toAnd a second carrier. At T ₀ -T _offset From moment to T ₀ In the time interval between moments, the terminal device does not want to trigger the second uplink handover. The carrier wave for radio frequency chain switching of the terminal equipment in the second uplink switching comprises a first carrier wave and/or a second carrier wave. For example, the second uplink handover includes the terminal device switching the radio frequency chain from the first carrier to the third carrier; or the second uplink switching comprises the terminal equipment switching the radio frequency chain from the second carrier to the third carrier; alternatively, the terminal device switches the radio frequency chain from the other carrier (the carrier other than the first carrier and the second carrier configured by the network device for the terminal device) to the first carrier or the second carrier. But may be normal for other uplink handovers that do not involve the first carrier and the second carrier. For example, as shown in FIG. 5, at T ₀ -T _offset From moment to T ₀ And in the time interval between the moments, the terminal equipment switches the radio frequency chain from the third carrier to the fourth carrier.

Optionally, the carrier wave for radio frequency chain switching by the terminal device in the second uplink switching includes a carrier wave where the first uplink transmission is located. Under the condition that the radio frequency chain of the carrier wave where the first uplink transmission is located is not affected, the network equipment can schedule the terminal equipment to carry out second uplink switching in the time interval from the second moment to the first moment. Thereby making the scheduling of the network device more flexible. The capability of the terminal equipment is fully utilized, and the time-frequency resource waste is avoided.

In the embodiment of the application, the terminal equipment performs the first uplink transmission at the first moment. The terminal device triggers a first uplink handover for the first uplink transmission. The first time is equal to the second time plus the preparation time of the first uplink transmission, and the second time is the time before the first time. The terminal equipment does not trigger the second uplink switching in the time interval from the second moment to the first moment; the carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is partially or completely the same as the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching. It can be seen that the second uplink switching corresponding to the second uplink transmission is limited in the preparation time of the first uplink transmission. But is not limited to an uplink handover in which there is no intersection with the carrier involved in the first uplink handover. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

The embodiment shown in fig. 12 above is presented by way of reverse description: and limiting the technical scheme of the terminal equipment for carrying out the second uplink switching in the preparation time of the first uplink transmission. The following description is presented in connection with the embodiment shown in fig. 13 by way of a forward description: the technical scheme of uplink switching which does not intersect with the carrier related to the first uplink switching is not limited in the preparation time of the first uplink transmission. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover.

Fig. 13 is a schematic diagram of another embodiment of a transmission method according to the present application. Referring to fig. 13, the method includes:

1301. and the terminal equipment performs first uplink transmission at a first moment.

The terminal device triggers a first uplink handover for the first uplink transmission. The first time is equal to the second time plus the preparation time for the first uplink transmission. For the preparation time of the first uplink transmission, refer to the related description above. The second time is a time before the first time.

For example, as shown in fig. 5, the terminal device performs the first uplink transmission on the second carrier at time T0. The first scheduling information indicates that the carrier wave of the terminal equipment for carrying out the first uplink transmission is a second carrier wave, and the terminal equipment can switch the radio frequency chain from the first carrier wave to the second carrier wave, so that the terminal equipment can conveniently carry out the first uplink transmission on the second carrier wave.

Optionally, the embodiment shown in fig. 13 further includes step 1301a. Step 1301a may be performed prior to step 1301.

1301a, the network device sends first scheduling information to the terminal device. Correspondingly, the terminal device receives the first scheduling information from the network device.

The first scheduling information is used for indicating the terminal equipment to perform first uplink transmission.

Specifically, the network device sends first scheduling information to the terminal device. The first scheduling information is used for indicating the terminal equipment to perform first uplink transmission. The first scheduling information further includes a carrier for instructing the terminal device to perform the first uplink transmission. For example, as shown in fig. 5, the terminal device may switch the radio frequency chain on the first carrier from the first carrier to the second carrier.

The carrier on which the terminal device performs radio frequency link switching in the first uplink switching may be referred to as a carrier related to the first uplink transmission. The carrier wave for the terminal equipment to switch the radio frequency chain in the first uplink switching comprises a first carrier wave and a second carrier wave, and specifically, the terminal equipment switches the radio frequency chain from the first carrier wave to the second carrier wave. The first carrier may be a carrier of a radio frequency chain that provides the second carrier with the first uplink transmission. Alternatively, the first carrier is a carrier associated with the second carrier configured by higher layer parameter higher layer signaling (e.g., DCI, MAC CE). Or the first carrier is a carrier related to the second carrier, which is reported by the terminal equipment. Alternatively, the first carrier is a carrier in the same frequency band or a similar frequency band as the second carrier.

1302. The terminal device triggers a second uplink handover for the second uplink transmission.

Specifically, the network device may schedule the terminal device to perform the second uplink transmission. The terminal device may perform the second uplink handover, so that the terminal device may perform the second uplink transmission. For example, the network device instructs the terminal device to perform the second uplink transmission on the fourth carrier. The terminal device can switch the radio frequency chain from the third carrier to the fourth carrier, so that the terminal device can conveniently carry out the second uplink transmission.

The carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is different from the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching. The carrier on which the terminal device performs radio frequency link switching in the second uplink switching may be referred to as a carrier related to the second uplink transmission. For example, the carriers for radio frequency link switching by the terminal device in the second uplink switching include a third carrier and a fourth carrier.

Optionally, the carrier wave for radio frequency chain switching by the terminal device in the second uplink switching does not include the carrier wave where the first uplink transmission is located. For example, the carriers for radio frequency link switching by the terminal device in the second uplink switching include the first carrier and the fourth carrier, but do not include the second carrier.

Optionally, the embodiment shown in fig. 13 further includes step 1302a. Step 1302a may be performed prior to step 1302.

1302a, the network device sends second scheduling information to the terminal device. Correspondingly, the terminal device receives the second scheduling information from the network device.

The second scheduling information is used for indicating the terminal equipment to perform second uplink transmission.

Specifically, the network device sends the second scheduling information to the terminal device. The second scheduling information is used for indicating the terminal equipment to perform second uplink transmission. The second scheduling information further includes a carrier for instructing the terminal device to perform a second uplink transmission. For example, as shown in fig. 5, the network device instructs the terminal device to perform the second uplink transmission on the fourth carrier. The terminal device may switch the radio frequency chain on the third carrier from the third carrier to the fourth carrier. Thereby facilitating the terminal device to perform the second uplink transmission on the fourth carrier.

Optionally, the embodiment shown in fig. 13 further includes step 1302b. Step 1302b may be performed prior to step 1302a.

1302b, the terminal device sends the first information to the network device. Accordingly, the network device receives the first information from the terminal device.

The first information is used for indicating: and under the condition that the carrier wave of the radio frequency chain switching of the terminal equipment in the first uplink switching is different from the carrier wave of the radio frequency chain switching of the terminal equipment in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment.

Optionally, the terminal device may report the first information to the network device by means of capability information. The network device may schedule the terminal device for the second uplink transmission. In this way, the terminal device may trigger, for the second uplink transmission, the second uplink handover in a time interval between the second time and the first time. For example, the first information may be capability information of the terminal device, for indicating that the terminal device supports uplink handover.

Optionally, the first information is used to indicate: and under the condition that the carrier wave where the first uplink transmission is positioned is different from the carrier wave where the terminal equipment performs radio frequency chain switching in the second uplink switching, the terminal equipment supports the second uplink switching in the time interval from the second moment to the first moment.

Based on the step 1302b, the step 1302 specifically includes: and the network equipment sends the second scheduling information to the terminal equipment according to the first information.

Specifically, the first information is used for indicating that the terminal equipment supports the second uplink switching in a time interval between the second moment and the first moment when the carrier of the terminal equipment for radio frequency chain switching in the first uplink switching is different from the carrier of the terminal equipment for radio frequency chain switching in the second uplink switching. Thus, the network device may schedule the terminal device for the second uplink transmission to the terminal device.

Therefore, the terminal equipment reports the first information through the capability information, so that the network equipment can acquire the capability information of the terminal equipment conveniently, the capability of the terminal equipment is fully utilized as much as possible, and the waste of resources is avoided.

It should be noted that, step 1302b above shows a case where the terminal device supports the second uplink handover. In practical application, if the terminal equipment does not support the second uplink switching, the terminal equipment reports the third information to the network equipment. The third information is used for the terminal equipment not to support the second uplink switching in the time interval from the second moment to the first moment when the carrier of the terminal equipment for radio frequency chain switching in the first uplink switching is different from the carrier of the terminal equipment for radio frequency chain switching in the second uplink switching. The network device does not schedule the terminal device to perform the second uplink transmission in combination with the third information.

1303. And the terminal equipment performs second uplink switching at the time interval from the second moment to the first moment.

The carrier wave of the radio frequency chain switching of the terminal equipment in the first uplink switching is different from the carrier wave of the radio frequency chain switching of the terminal equipment in the second uplink switching.

For example, as shown in fig. 5, the terminal device is at T ₀ And carrying out first uplink transmission on the second carrier at the moment. In order to support the first uplink transmission, the terminal device needs to switch the radio frequency chain on the first carrier from the first carrier to the second carrier. At T ₀ -T _offset Time to T ₀ In the time interval between moments, the terminal device does not want to trigger another uplink handover involving the first carrier and the second carrier. But may be normal for other uplink handovers that do not involve the first carrier and the second carrier. For example, as shown in FIG. 5, at T ₀ -T _offset From moment to T ₀ And in the time interval between the moments, the terminal equipment performs second uplink switching, specifically, the terminal equipment switches the radio frequency chain from the third carrier to the fourth carrier.

Optionally, the carrier on which the first uplink transmission is located is different from the carrier on which the terminal device performs radio frequency chain switching in the second uplink switching. At T ₀ -T _offset Time to T ₀ In the time interval between moments, the terminal device does not want to trigger an uplink handover involving the carrier on which the first uplink transmission is located. But uplink switching may be performed normally for other carriers not involving the first uplink transmission.

1304. And the terminal equipment performs second uplink transmission.

For example, as shown in fig. 5, the terminal device performs the second uplink transmission on the fourth carrier.

In the embodiment of the application, the terminal equipment performs the first uplink transmission at the first moment, and triggers the first uplink switching for the first uplink transmission. The first time is equal to the second time plus the preparation time of the first uplink transmission, and the second time is the time before the first time. The terminal device triggers a second uplink handover for the second uplink transmission. And the terminal equipment performs second uplink switching in the time interval from the second moment to the first moment. The carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is different from the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching. And the terminal equipment performs second uplink transmission. It is thus clear that the terminal device is not restricted to switch on a carrier different from the carrier involved in the first uplink switch during the preparation time for the first uplink transmission. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of network resources.

It will be appreciated that the various method embodiments described above may be practiced alone or in combination. The terminology and related techniques involved in the various embodiments may be referenced to each other.

The following describes a communication device provided by an embodiment of the present application. Referring to fig. 14, fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the application. The communication device may be configured to perform the steps performed by the terminal device in the embodiments shown in fig. 6, 8, 10, 12 and 13, and reference is specifically made to the relevant description in the above method embodiments.

The communication device 1400 includes a processing module 1401. Optionally, the communication device 1400 further includes a transceiver module 1402.

The transceiver module 1402 may implement corresponding communication functions, and the transceiver module 1402 may also be referred to as a communication interface or a communication unit. The processing module 1401 is used to perform processing operations.

Optionally, the communication device 1400 may further include a storage module, where the storage module may be used to store instructions and/or data, and the processing module 1401 may read the instructions and/or data in the storage module, so that the communication device implements the method embodiments shown in fig. 6, 8, 10, 12, and 13.

The communication apparatus 1400 may be used to perform the actions performed by the terminal device in the method embodiments above. The communication apparatus 1400 may be a terminal device or a component configurable at a terminal device. The transceiver module 1402 is configured to perform operations related to reception at the terminal device side in the above method embodiment, and the processing module 1401 is configured to perform operations related to processing at the terminal device side in the above method embodiment.

Alternatively, the transceiver module 1402 may include a transmitting module and a receiving module. The sending module is configured to perform the sending operation of the terminal device in the method embodiments shown in fig. 6, fig. 8, fig. 10, fig. 12, and fig. 13. The receiving module is configured to perform the receiving operation of the terminal device in the method embodiments shown in fig. 6, fig. 8, fig. 10, fig. 12, and fig. 13.

It should be noted that the communication apparatus 1400 may include a transmitting module, and not include a receiving module. Alternatively, the communication device 1400 may include a receiving module instead of a transmitting module. Specifically, it may be determined whether or not the above scheme executed by the communication apparatus 1400 includes a transmission operation and a reception operation.

In a possible implementation manner, the communication apparatus 1400 is configured to perform the following scheme:

a processing module 1401, configured to switch from a first carrier to a second carrier during a first switching time, or switch from the second carrier to the first carrier during the first switching time; the first switching time is overlapped with the first overlapping time, and the first overlapping time is the overlapping time of the first time slot and the second time slot; the first time slot corresponds to a first carrier wave, and the second time slot corresponds to a second carrier wave; the first carrier is the carrier of the first cell, and the second carrier is the carrier of the second cell; the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all time slots corresponding to the second carrier wave, and the initial boundary of the second time slot is prior to the initial boundary of the third time slot; the third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot; the uplink switch is not performed within a first time, which is a continuous period of time starting from a starting time domain position of the second time slot.

In this implementation, the processing module 1401 performs an uplink switch on at least two carriers during a first switch time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The processing module 1401 is unable to make an up-switch at the first time. The number of uplink switching times of the processing module 1401 in a multi-TAG scene in one time slot is specified, so that the uplink switching frequency of the communication device 1400 in one time slot in the multi-TAG scene is specified, and the implementation complexity of the terminal device is reduced.

In another possible implementation, the communication device 1400 is configured to perform the following:

a processing module 1401, configured to switch from a first carrier to a second carrier during a first switching time, or switch from the second carrier to the first carrier during the first switching time; the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of a first time slot and a second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is prior to the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot; and performing the first uplink switching at a second switching time, wherein the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

In this implementation, the processing module 1401 switches the first carrier to the second carrier during the first switching time or switches the second carrier to the first carrier during the first switching time, where the first switching time overlaps with the overlapping time of the first time slot and the second time slot. I.e. the processing module 1401 performs an uplink switch on at least two carriers during the first switching time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The processing module 1401 may perform the first uplink handover at the second handover time. Thereby fully exploiting the capabilities of the communication device 1400 such that the flexibility of the network apparatus to schedule the communication device 1400 is increased, if the capabilities of the communication device 1400 allow. And the communication transmission performance is improved.

a processing module 1401, configured to switch from a first carrier to a second carrier during a first switching time, or switch from the second carrier to the first carrier during the first switching time; the first switching time and the first overlapping time are not overlapped, the first switching time and the first time slot are overlapped, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is the carrier of a first cell, the second carrier is the carrier of a second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the initial boundary closest to the initial boundary of the first time slot in all time slots corresponding to the second carrier, and the initial boundary of the first time slot is prior to the initial boundary of the second time slot; and performing the first uplink switching at a second switching time, wherein the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

In this implementation, the processing module 1401 switches from the first carrier to the second carrier during the first switching time or from the second carrier to the first carrier during the first switching time. The first switching time does not overlap with the first overlap time, and the first switching time overlaps with the first time slot. I.e. the processing module 1401 performs an uplink switch on at least two carriers during the first switching time. The first carrier and the second carrier belong to the at least two carriers, the first carrier is a carrier before switching, and the second carrier is a carrier after switching; or the second carrier is a carrier before switching, and the first carrier is a carrier after switching. The processing module 1401 may perform the first uplink handover at the second handover time. Thereby fully exploiting the capabilities of the communication device 1400 such that the flexibility of the network apparatus to schedule the communication device 1400 is increased, if the capabilities of the communication device 1400 allow. And the communication transmission performance is improved.

a processing module 1401, configured to perform a first uplink transmission at a first time, where the terminal device triggers a first uplink handover for the first uplink transmission, and the first time is equal to a second time plus a preparation time of the first uplink transmission, and the second time is a time before the first time; triggering no second uplink switching in the time interval from the second moment to the first moment; the carrier wave of the terminal equipment in the first uplink switching for radio frequency chain switching is partially or completely the same as the carrier wave of the terminal equipment in the second uplink switching for radio frequency chain switching.

In this implementation, the communication device 1400 is restricted from performing the second uplink handover corresponding to the second uplink transmission in the time interval between the second time and the first time. But is not limited to an uplink handover in which there is no intersection with the carrier involved in the first uplink handover. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover. Thereby fully utilizing the capability of the communication device 1400 as much as possible and avoiding waste of time-frequency resources.

a processing module 1401, configured to perform a first uplink transmission at a first time; the first moment is equal to the second moment plus the preparation time of the first uplink transmission, and the second moment is the moment before the first moment; triggering a second uplink switch for the second uplink transmission; the second uplink switching is carried out in the time interval between the second moment and the first moment, and the carrier wave of the radio frequency chain switching carried out by the terminal equipment in the first uplink switching is different from the carrier wave of the radio frequency chain switching carried out by the terminal equipment in the second uplink switching; and performing second uplink transmission.

In the above-mentioned embodiments, the processing module 1401 performs the second uplink switching in the time interval between the second time and the first time, and the carrier of the radio frequency chain switching performed by the communication device 1400 in the first uplink switching is different from the carrier of the radio frequency chain switching performed by the communication device 1400 in the second uplink switching; the processing module 1401 performs a second uplink transmission. As can be seen, the communication apparatus 1400 is not restricted from switching on a carrier different from the carrier involved in the first uplink switching during the preparation time for the first uplink transmission. Thereby fully utilizing the capability of the communication device 1400 as much as possible and avoiding waste of time-frequency resources.

The following describes a communication device provided by an embodiment of the present application. Referring to fig. 15, fig. 15 is a schematic structural diagram of a communication device according to an embodiment of the application. The communication device may be configured to perform the steps performed by the network device in the embodiment shown in fig. 6, and reference is specifically made to the description related to the above method embodiment.

Communication device 1500 includes a processing module 1501. Optionally, the communication device 1500 further comprises a transceiver module 1502.

The transceiver module 1502 may implement corresponding communication functions, and the transceiver module 1502 may also be referred to as a communication interface or a communication unit. The processing module 1501 is used to perform processing operations.

Optionally, the communication device 1500 may further include a storage module, where the storage module may be used to store instructions and/or data, and the processing module 1501 may read the instructions and/or data in the storage module, so that the communication device implements the method embodiment shown in fig. 6.

The communications apparatus 1500 can be employed to perform the actions performed by the network device in the method embodiments above. The communications apparatus 1500 can be a network device or a component configurable in a network device. The transceiver module 1502 is configured to perform operations related to receiving at the network device side in the above method embodiment, and the processing module 1501 is configured to perform operations related to processing at the network device side in the above method embodiment.

Alternatively, the transceiver module 1502 may include a transmitting module and a receiving module. The sending module is configured to perform the sending operation of the network device in the method embodiment shown in fig. 6. The receiving module is configured to perform the receiving operation of the network device in the method embodiment shown in fig. 6.

It should be noted that, the communication apparatus 1500 may include a transmitting module, and not include a receiving module. Alternatively, the communication apparatus 1500 may include a receiving module instead of a transmitting module. Specifically, it may be determined whether or not the above scheme executed by the communication apparatus 1500 includes a transmission operation and a reception operation.

In a possible implementation manner, the communication apparatus 1500 is configured to perform the following scheme:

a processing module 1501, configured to not schedule a first uplink transmission in which a terminal device performs uplink handover in a first time; wherein the first time is a continuous time from a starting time domain position of the second time slot; the second time slot corresponds to a second carrier wave, and the first time is positioned after the first switching time; the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier; the first switching time is overlapped with the first overlapping time; the first overlapping time is the overlapping time of the first time slot and the second time slot; the first time slot corresponds to a first carrier wave, and the second time slot corresponds to a second carrier wave; the first carrier is a carrier of a first cell, and the second carrier is a carrier of a second cell; the first cell and the second cell belong to different TAGs, the second time slot is the time slot with the initial boundary closest to the initial boundary of the third time slot in all time slots corresponding to the second carrier, and the initial boundary of the second time slot is prior to the initial boundary of the third time slot; the third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot.

In this implementation, the processing module 1501 may not schedule the first uplink transmission of the terminal device for uplink handover in the first time. Thereby avoiding the terminal equipment from carrying out uplink switching in the first time. And the first time is located after the first switching time. The first switching time is a time when the terminal device switches from the first carrier to the second carrier or a time when the terminal device switches from the second carrier to the first carrier. The first switching time overlaps the first overlap time. The first overlap time is an overlap time of the first time slot and the second time slot. Thereby avoiding the terminal device from carrying out uplink switching for a plurality of times in the second time slot, and leading the uplink switching of the terminal device to be too frequent. According to the technical scheme, the number of times of uplink switching of the terminal equipment in one time slot under the multi-TAG scene is specified, so that the uplink switching frequency of the terminal equipment in one time slot under the multi-TAG scene is specified, and the implementation complexity of the terminal equipment is reduced.

The following describes a communication device provided by an embodiment of the present application. Referring to fig. 16, fig. 16 is a schematic structural diagram of a communication device according to an embodiment of the application. The communication device may be configured to perform the steps performed by the network device in the embodiments shown in fig. 8, 10 and 13, and reference is specifically made to the relevant description in the above method embodiments.

The communication device 1600 includes a transceiver module 1601. Optionally, the communication device 1600 further comprises a processing module 1602.

The transceiver module 1601 may implement a corresponding communication function, and the transceiver module 1601 may also be referred to as a communication interface or a communication unit. The processing module 1602 is configured to perform processing operations.

Optionally, the communication device 1600 may further include a storage module, where the storage module may be used to store instructions and/or data, and the processing module 1602 may read the instructions and/or data in the storage module, so that the communication device implements the method embodiments shown in fig. 8 and 10 described above.

The communications apparatus 1600 can be configured to perform actions performed by network devices in the above method embodiments. The communications apparatus 1600 can be a network device or a component configurable in a network device. The transceiver module 1601 is configured to perform operations related to receiving at the network device side in the above method embodiment, and the processing module 1602 is configured to perform operations related to processing at the network device side in the above method embodiment.

Alternatively, the transceiver module 1601 may include a transmitting module and a receiving module. The sending module is configured to perform the sending operation of the network device in the method embodiments shown in fig. 8, fig. 10, and fig. 13. The receiving module is configured to perform the receiving operation of the network device in the method embodiments shown in fig. 8, fig. 10, and fig. 13.

It should be noted that, the communication device 1600 may include a transmitting module, and not include a receiving module. Alternatively, the communication device 1600 may include a receiving module instead of a transmitting module. Specifically, it may be determined whether the above scheme performed by the communication apparatus 1600 includes a transmitting action and a receiving action.

In a possible implementation manner, the communication device 1600 is configured to perform the following scheme:

a transceiver module 1601, configured to send first scheduling information to a terminal device; the first scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier from the second carrier to the first carrier, the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different TAGs, the second time slot is a time slot with the start boundary closest to the start boundary of a third time slot in all time slots corresponding to the second carrier, the start boundary of the second time slot is earlier than the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot.

In the above technical solution, the transceiver module 1601 schedules the terminal device to perform the first uplink transmission of the first uplink handover in the second handover time. The second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, and the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier. The first switching time overlaps with a first overlapping time, which is an overlapping time of the first time slot and the second time slot. The terminal equipment can conduct the first uplink switching at the second switching time. Thereby fully utilizing the capabilities of the terminal device such that the flexibility of the communication apparatus 1600 to schedule the terminal device is increased, if the capabilities of the terminal device allow. And the communication transmission performance is improved.

In another possible implementation, the communication device 1600 is configured to perform the following scheme:

a transceiver module 1601, configured to send scheduling information to a terminal device; the scheduling information is used for scheduling first uplink transmission of first uplink switching of the terminal equipment in second switching time, the second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the second carrier to the first carrier, the first switching time is not overlapped with the first overlapping time, the first switching time is overlapped with the first time slot, the first overlapping time is the overlapped time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, and the first cell and the second cell belong to different TAGs; the second time slot is the time slot with the start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot.

In the above technical solution, the transceiver module 1601 may schedule the terminal device to perform the first uplink transmission, so that the terminal device triggers the first uplink switch for the first uplink transmission within the second switching time. The second switching time is overlapped with the second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier or the time of switching the terminal equipment from the second carrier to the first carrier, and the first switching time is not overlapped with the first overlapping time. The first switching time is overlapped with the first time slot, and the first overlapped time is the overlapped time of the first time slot and the second time slot. Thereby fully utilizing the capabilities of the terminal device such that the flexibility of the communication apparatus 1600 to schedule the terminal device is increased, if the capabilities of the terminal device allow. And the communication transmission performance is improved.

a transceiver module 1601, configured to send first scheduling information to a terminal device, where the first scheduling information is used to schedule the terminal device to perform a first uplink transmission for a first uplink handover; and sending second scheduling information to the terminal equipment, wherein the second scheduling information is used for scheduling second uplink transmission of the terminal equipment for performing second uplink switching in a time interval between a second moment and a first moment, the first moment is the starting time of the terminal equipment for performing first uplink transmission, the first moment is equal to the second moment plus the preparation time of the first uplink transmission, the second moment is the moment before the first moment, and the carrier wave of the terminal equipment for performing radio frequency chain switching in the first uplink switching is different from the carrier wave of the terminal equipment for performing radio frequency chain switching in the second uplink switching.

In the above technical solution, the transceiver module 1601 sends second scheduling information to the terminal device, and is configured to schedule the terminal device to perform the first uplink transmission. And triggering the second uplink transmission for the terminal equipment to perform second uplink switching in the time interval from the second moment to the first moment. As can be seen from this, in the preparation time of the first uplink transmission, the communication apparatus 1600 may schedule the terminal device to perform the second uplink handover, that is, not limit the terminal device to perform handover on carriers with different carriers related to the first uplink handover through the time interval between the second time and the first time. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

The following describes a communication device provided by an embodiment of the present application. Referring to fig. 17, fig. 17 is a schematic structural diagram of a communication device according to an embodiment of the application. The communication device may be configured to perform the steps performed by the network device in the embodiment shown in fig. 12, and reference is specifically made to the description related to the above method embodiment.

The communication device 1700 includes a transceiver module 1701 and a processing module 1702.

The transceiver module 1701 may implement a corresponding communication function, and the transceiver module 1701 may also be referred to as a communication interface or a communication unit. The processing module 1702 is configured to perform processing operations.

Optionally, the communication device 1700 may further include a storage module, where the storage module may be used to store instructions and/or data, and the processing module 1702 may read the instructions and/or data in the storage module, so that the communication device implements the method embodiments shown in fig. 12 and 13.

The communication apparatus 1700 may be used to perform the actions performed by the network device in the method embodiments above. The communication apparatus 1700 may be a network device or a component configurable in a network device. The transceiver module 1701 is configured to perform operations related to receiving at the network device side in the above method embodiment, and the processing module 1702 is configured to perform operations related to processing at the network device side in the above method embodiment.

Alternatively, the transceiver module 1701 may include a transmitting module and a receiving module. The sending module is configured to perform the sending operation of the network device in the method embodiments shown in fig. 12 and fig. 13. The receiving module is configured to perform the receiving operation of the network device in the method embodiments shown in fig. 12 and fig. 13.

Note that the communication apparatus 1700 may include a transmitting module, and not include a receiving module. Alternatively, the communication device 1700 may include a receiving module instead of a transmitting module. Specifically, it may be determined whether or not the above scheme executed by the communication apparatus 1700 includes a transmission action and a reception action.

In a possible implementation manner, the communication apparatus 1700 is configured to perform the following scheme:

a transceiver module 1701, configured to send scheduling information to a terminal device, where the scheduling information is used to schedule the terminal device to perform a first uplink transmission for a first uplink handover;

the processing module 1702 is configured to not schedule, for the terminal device, second uplink transmission for performing second uplink switching in a time interval between a second time and a first time, where the first time is a start time of the first uplink transmission by the terminal device, the first time is equal to the second time plus a preparation time of the first uplink transmission, and the second time is a time before the first time, where a carrier wave of the radio frequency link switching performed by the terminal device in the first uplink switching is partially or completely the same as a carrier wave of the radio frequency link switching performed by the terminal device in the second uplink switching.

In the above technical solution, the transceiver module 1701 is configured to send scheduling information to the terminal device, where the scheduling information is used to schedule the terminal device to perform a first uplink transmission for a first uplink handover. The processing module 1702 does not schedule the terminal device to perform the second uplink transmission of the second uplink handover in the time interval between the second time and the first time. So that the terminal device does not perform the second uplink handover in the time interval between the second time and the first time. But is not limited to an uplink handover in which there is no intersection with the carrier involved in the first uplink handover. The carrier related to the first uplink handover refers to a carrier for radio frequency chain handover of the terminal device in the first uplink handover. Thereby fully utilizing the capability of the terminal equipment as much as possible and avoiding the waste of time-frequency resources.

A possible configuration of the communication device as a terminal device is shown below by way of fig. 18.

Fig. 18 shows a simplified schematic diagram of the structure of a terminal device. For ease of understanding and illustration, in fig. 18, a terminal device is exemplified by a cellular phone. As shown in fig. 18, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device.

The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is mainly used for storing software programs and data.

The radio frequency circuit is mainly used for converting a baseband signal and a radio frequency signal and processing the radio frequency signal.

The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

It should be noted that some kinds of terminal apparatuses may not have an input/output device.

When data need to be sent, the processor carries out baseband processing on the data to be sent and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit carries out radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

For ease of illustration, only one memory and processor is shown in fig. 18. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device, etc. The memory may be provided separately from the processor or may be integrated with the processor, as the embodiments of the application are not limited in this respect.

In the embodiment of the application, the antenna and the radio frequency circuit with the receiving and transmitting functions can be regarded as a receiving and transmitting unit of the terminal equipment, and the processor with the processing function can be regarded as a processing unit of the terminal equipment. As shown in fig. 18, the terminal device includes a transceiving unit 1810 and a processing unit 1820. The transceiver unit may also be referred to as a transceiver, transceiver device, etc. The processing unit may also be called a processor, a processing board, a processing module, a processing device, etc.

Alternatively, the device for implementing the receiving function in the transceiver unit 1810 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1810 may be regarded as a transmitting unit, that is, the transceiver unit 1810 includes a receiving unit and a transmitting unit. The transceiver unit may also be referred to as a transceiver, transceiver circuitry, or the like. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that the transceiver unit 1810 is configured to perform the transmitting operation and the receiving operation of the terminal device in the above method embodiment, and the processing unit 1820 is configured to perform other operations on the terminal device except for the transmitting operation in the above method embodiment.

When the terminal device is a chip, the chip comprises a transceiver unit and a processing unit. The receiving and transmitting unit can be an input and output circuit or a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit or logic circuit on the chip.

The present application also provides a communication device, please refer to fig. 19, which is another schematic structural diagram of the communication device according to the embodiment of the present application. The communication means may be adapted to perform the steps performed by the network device in the embodiments shown in fig. 6, 8, 10, 12 and 13, reference being made to the relevant description in the method embodiments described above.

The communication device includes a processor 1901. Optionally, the communication device further comprises a memory 1902 and a transceiver 1903.

In one possible implementation, the processor 1901, memory 1902, and transceiver 1903 are each coupled via a bus, with computer instructions stored in the memory.

Alternatively, the processing module 1501 in the foregoing embodiment may be specifically the processor 1901 in the present embodiment, so that detailed implementation of the processor 1901 is not described herein. The transceiver module 1502 in the foregoing embodiment may be specifically the transceiver 1903 in the present embodiment, so that detailed implementation of the transceiver 1903 is not described herein.

Alternatively, the processing module 1602 in the foregoing embodiment may be specifically the processor 1901 in the present embodiment, so that detailed implementation of the processor 1901 is not described herein. The transceiver module 1601 in the foregoing embodiment may be specifically the transceiver 1903 in the present embodiment, so detailed implementation of the transceiver 1903 is not described herein.

Alternatively, the processing module 1702 in the foregoing embodiment may be specifically the processor 1901 in the present embodiment, so that the specific implementation of the processor 1901 is not described herein. The transceiver module 1701 in the foregoing embodiment may be specifically the transceiver 1903 in the present embodiment, so that detailed description of the implementation of the transceiver 1903 is omitted.

The embodiment of the application also provides a communication system which comprises the terminal equipment and the network equipment. The terminal device is configured to perform all or part of the steps performed by the terminal device in the embodiments shown in fig. 6, 8, 10, 12 and 13. The network device is configured to perform all or part of the steps performed by the network device in the embodiments shown in fig. 6, 8, 10, 12 and 13.

Embodiments of the present application also provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the embodiments shown in fig. 6, 8, 10, 12 and 13 described above.

Embodiments of the present application also provide a computer-readable storage medium comprising computer instructions which, when run on a computer, cause the computer to perform the method of the embodiments shown in fig. 6, 8, 10, 12 and 13 described above.

The embodiment of the application also provides a chip device, which comprises a processor, wherein the processor is connected with the memory, and calls the program stored in the memory, so that the processor executes the method of the embodiment shown in the above fig. 6, 8, 10, 12 and 13.

The processor referred to in any of the above may be a general purpose central processing unit, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the program execution of the methods of the embodiments shown in fig. 6, 8, 10, 12, and 13. The memory mentioned in any of the above may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM), etc.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to 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 RAM, a magnetic disk, or an optical disk, etc., which can store program codes.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A transmission method, the method comprising:

the terminal equipment is switched from a first carrier to a second carrier in a first switching time or from the second carrier to the first carrier in the first switching time;

the first switching time overlaps with a first overlapping time, the first overlapping time is an overlapping time of a first time slot and a second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different timing advance groups TAG, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is prior to the start boundary of the third time slot, the third time slot corresponds to the first carrier, and the third time slot is the first time slot after the first time slot;

the terminal device does not perform an uplink handover in a first time, which is a continuous time from a starting time domain position of the second time slot.

2. The method of claim 1, wherein the first switching time overlaps with a second overlapping time, the second overlapping time being an overlapping time of the first time slot and a fourth time slot, the fourth time slot corresponding to a third carrier, the third carrier being a carrier of a third cell, the third cell belonging to a different TAG than the first cell and the second cell, respectively; the fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot;

the method further comprises the steps of:

the terminal device switches from the first carrier to the third carrier in the first switching time, or switches from the third carrier to the second carrier in the first switching time.

3. A transmission method, the method comprising:

the network equipment does not schedule the terminal equipment to carry out the first uplink transmission of uplink switching in the first time;

the first time is a period of continuous time from a starting time domain position of a second time slot, the second time slot corresponds to a second carrier, the first time is located after a first switching time, the first switching time is a time when the terminal device switches from the first carrier to the second carrier, or is a time when the terminal device switches from the second carrier to the first carrier, the first switching time overlaps with a first overlapping time, the first overlapping time is an overlapping time of a first time slot and a second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different timing advance groups TAG, the second time slot is a time slot with a starting boundary closest to a starting boundary of a third time slot in all time slots corresponding to the second carrier, and the first time slot corresponds to the starting boundary of the third time slot, the first time slot is a first time slot is preceded by the first time slot.

4. The method of claim 3, wherein the first switching time overlaps with a second overlapping time, the second overlapping time being an overlapping time of the first time slot and a fourth time slot, the fourth time slot corresponding to a third carrier, the third carrier being a carrier of a third cell, the third cell belonging to a different TAG than the first cell and the second cell, respectively; the fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot.

5. The method according to any one of claims 1 to 4, wherein the length of the first time is a slot length corresponding to a maximum subcarrier spacing of at least two subcarriers configured by the network device for the terminal device for uplink switching.

6. A transmission method, the method comprising:

The first switching time overlaps with a first overlapping time, the first overlapping time is an overlapping time of a first time slot and a second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, the first cell and the second cell belong to different timing advance groups TAG, the second time slot is a time slot with a start boundary closest to a start boundary of a third time slot in all time slots corresponding to the second carrier, and the start boundary of the second time slot is prior to the start boundary of the third time slot, the third time slot corresponds to the second carrier, and the third time slot is the first time slot after the first time slot;

and the terminal equipment performs first uplink switching at a second switching time, wherein the second switching time is overlapped with the second time slot, and the second switching time is not overlapped with the first switching time.

7. The method of claim 6, wherein the first switching time overlaps with a second overlapping time, the second overlapping time being an overlapping time of the first time slot and a fourth time slot, the fourth time slot corresponding to a third carrier, the third carrier being a carrier of a third cell, the third cell belonging to a different TAG than the first cell and the second cell; the fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot;

The method further comprises the steps of:

8. The method according to claim 6 or 7, characterized in that the method further comprises:

the terminal equipment receives first scheduling information from the network equipment, wherein the first scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission, and the terminal equipment triggers the first uplink switching for the first uplink transmission.

9. A transmission method, the method further comprising:

the network equipment sends first scheduling information to the terminal equipment;

the first scheduling information is used for scheduling the first uplink transmission of the first uplink switch of the terminal equipment in a second switching time, the second switching time is overlapped with a second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from the first carrier to the second carrier, or the time of switching the terminal equipment from the second carrier to the first carrier, the first switching time is overlapped with the first overlapping time, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is the carrier of the first cell, the second carrier is the carrier of the second cell, the first cell and the second cell belong to different timing advance groups TAG, the second time slot is the time of switching the second carrier from the first time slot to the first time slot, the first time slot is the first time slot, and the second time slot is the first time slot, and the first time slot is the first time slot.

10. The method of claim 9, wherein the first switching time overlaps with a second overlapping time, the second overlapping time being an overlapping time of the first time slot and a fourth time slot, the fourth time slot corresponding to a third carrier, the third carrier being a carrier of a third cell, the third cell belonging to a different TAG than the first cell and the second cell; the fourth time slot is the time slot with the start boundary closest to the start boundary of the third time slot in all time slots corresponding to the third carrier, and the start boundary of the fourth time slot is earlier than the start boundary of the third time slot.

11. The method according to any of claims 6 to 10, wherein the first switching time does not overlap with a time region of the second time slot other than the first overlapping time.

12. The method according to any one of claims 6 to 11, wherein a time interval between the first switching time and the second switching time is greater than or equal to a first threshold.

13. A transmission method, the method comprising:

The first switching time and the first overlapping time are not overlapped, the first switching time and the first time slot are overlapped, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to the first carrier, the second time slot corresponds to the second carrier, the first carrier is a carrier of a first cell, the second carrier is a carrier of a second cell, and the first cell and the second cell belong to different timing advance groups TAG; the second time slot is a time slot with a start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot;

14. The method of claim 13, wherein the terminal device performs the first uplink handover at the second handover time, the method further comprising:

the terminal equipment receives scheduling information from the network equipment, wherein the scheduling information is used for scheduling the terminal equipment to perform first uplink transmission of first uplink switching in the second switching time.

15. A transmission method, the method comprising:

the network equipment sends scheduling information to the terminal equipment;

the scheduling information is used for scheduling the first uplink transmission of the first uplink switching of the terminal equipment in a second switching time, the second switching time is overlapped with a second time slot, the second switching time is not overlapped with the first switching time, the first switching time is the time of switching the terminal equipment from a first carrier to a second carrier or the time of switching the second carrier to the first carrier, the first switching time is not overlapped with a first overlapping time, the first switching time is overlapped with a first time slot, the first overlapping time is the overlapping time of the first time slot and the second time slot, the first time slot corresponds to a first carrier, the second time slot corresponds to a second carrier, the first carrier is the carrier of a first cell, the second carrier is the carrier of a second cell, and the first cell and the second cell belong to different timing advance groups TAG; the second time slot is a time slot with a start boundary closest to the start boundary of the first time slot in all time slots corresponding to the second carrier, and the start boundary of the first time slot is earlier than the start boundary of the second time slot.

16. The method according to any one of claims 13 to 15, wherein a time interval between the first switching time and the second switching time is greater than or equal to a first threshold.

17. A transmission method, the method comprising:

the method comprises the steps that terminal equipment performs first uplink transmission at a first moment, the terminal equipment triggers first uplink switching for the first uplink transmission, the first moment is equal to a second moment plus preparation time of the first uplink transmission, and the second moment is a moment before the first moment;

the terminal equipment does not trigger a second uplink switch in the time interval from the second moment to the first moment; and the carrier wave of the radio frequency chain switching of the terminal equipment in the first uplink switching is partially or completely the same as the carrier wave of the radio frequency chain switching of the terminal equipment in the second uplink switching.

18. A transmission method, the method comprising:

the network equipment sends scheduling information to the terminal equipment, wherein the scheduling information is used for scheduling the terminal equipment to carry out first uplink transmission of first uplink switching;

the network device does not schedule the second uplink transmission of the second uplink switching performed by the terminal device in a time interval between a second time and a first time, wherein the first time is a starting time of the first uplink transmission performed by the terminal device, the first time is equal to the second time plus a preparation time of the first uplink transmission, the second time is a time before the first time, and a carrier wave of the radio frequency chain switching performed by the terminal device in the first uplink switching is partially or completely the same as a carrier wave of the radio frequency chain switching performed by the terminal device in the second uplink switching.

19. A communication device comprising a processor for executing a computer program or computer instructions in a memory to perform the method of claim 1, 2 or 5; or to perform the method of any one of claims 6 to 8, 11, 12; or to perform the method of any one of claims 13, 14 and 16; or to perform the method of claim 17.

20. A communication device comprising a processor for executing a computer program or computer instructions in a memory to perform the method of any of claims 3 to 5; or to perform the method of any one of claims 9 to 12; or to perform the method of claim 15 or 16; or to perform the method of claim 18.

21. A computer readable storage medium, having stored thereon a computer program which, when executed by a communication device, causes the communication device to perform the method of any of claims 1 to 18.