CN117441389A - Uplink transmission method, device, equipment and storage medium - Google Patents

Abstract

The application discloses an uplink transmission method, an uplink transmission device, uplink transmission equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: adjusting the timing advance based on the adjustment information to obtain an adjusted timing advance; the adjustment information comprises first adjustment information or second adjustment information, wherein the first adjustment information comprises at least part of the last acquired open-loop adjustment information, and the second adjustment information comprises at least part of the last acquired closed-loop adjustment information; and performing uplink transmission based on the adjusted timing advance. According to the method and the device for adjusting the timing advance, at least part of information in the open-loop adjustment information acquired last time is adopted for open-loop adjustment, or at least part of information in the closed-loop adjustment information acquired last time is adopted for closed-loop adjustment, the situation that repeated adjustment is carried out on the same time period is effectively avoided, accuracy of the timing advance is improved, and timing synchronization performance of a system is improved.

Description

Uplink transmission method, device, equipment and storage medium Technical field

The embodiments of the present application relate to the field of communication technology, and in particular to an uplink transmission method, device, equipment and storage medium.

Background technique

In order to ensure the time synchronization of uplink and downlink on the network side, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) proposed a timing advance (Timing Advance, TA) mechanism.

The timing advance mechanism is generally used for the uplink transmission of terminal equipment. In order to ensure that the uplink data packets transmitted by the terminal equipment arrive at the network side at the expected time, the timing advance mechanism is advanced according to the estimated radio frequency transmission delay caused by distance, etc. time to send uplink packets. In the TN (Terrestrial Networks, terrestrial network) system, the specific timing advance amount is calculated by the network side based on the random access preamble or other uplink signals sent by the terminal equipment, and then the network side passes the Timing Advance Command (Timing Advance Command). , TAC) is notified to the terminal device, so that the terminal device can learn the timing advance, and perform uplink transmission in advance according to the timing advance notified by the network side.

However, due to the large delay between the terminal equipment and the network side in the NTN (Non-Terrestrial Networks) system, the method of determining the timing advance in the TN system is not fully applicable to the NTN system. Therefore, for NTN systems, how to determine the timing advance and perform uplink transmission according to the timing advance requires further discussion and research.

Contents of the invention

Embodiments of the present application provide an uplink transmission method, device, equipment and storage medium. The technical solutions are as follows:

On the one hand, embodiments of the present application provide an uplink transmission method, which is applied to terminal equipment. The method includes:

Adjust the timing advance based on the adjustment information to obtain the adjusted timing advance;

Based on the adjusted timing advance, perform uplink transmission;

Wherein, the adjustment information includes first adjustment information or second adjustment information. The first adjustment information includes at least part of the open-loop adjustment information obtained last time. The second adjustment information includes the open-loop adjustment information obtained last time. At least part of the information in the closed-loop adjustment information.

On the other hand, embodiments of the present application provide an uplink transmission device, which is provided in a terminal device. The device includes:

The adjustment module is used to adjust the timing advance based on the adjustment information to obtain the adjusted timing advance;

A transmission module, configured to perform uplink transmission based on the adjusted timing advance;

Wherein, the adjustment information includes first adjustment information or second adjustment information. The first adjustment information includes at least part of the open-loop adjustment information obtained last time. The second adjustment information includes the open-loop adjustment information obtained last time. At least part of the information in the closed-loop adjustment information.

On the other hand, embodiments of the present application provide a terminal device, which includes: a processor, and a transceiver connected to the processor; wherein:

The processor is configured to adjust the timing advance based on the adjustment information to obtain the adjusted timing advance;

The transceiver is configured to perform uplink transmission based on the adjusted timing advance;

Wherein, the adjustment information includes first adjustment information or second adjustment information. The first adjustment information includes at least part of the open-loop adjustment information obtained last time. The second adjustment information includes the open-loop adjustment information obtained last time. At least part of the information in the closed-loop adjustment information.

On the other hand, embodiments of the present application provide a computer-readable storage medium. A computer program is stored in the storage medium. The computer program is used to be executed by a processor of a terminal device to implement the above uplink transmission method.

In yet another aspect, embodiments of the present application provide a chip, which includes programmable logic circuits and/or program instructions, and is used to implement the above uplink transmission method when the chip is run on a terminal device.

On the other hand, embodiments of the present application provide a computer program product, which is used to implement the above uplink transmission method when the computer program product is run on a terminal device.

The technical solutions provided by the embodiments of this application may include the following beneficial effects:

The timing advance is adjusted by combining open-loop adjustment and closed-loop adjustment, which is suitable for the uplink transmission of terminal equipment in the NTN system and ensures the time synchronization of uplink and downlink on the network side. Moreover, in the embodiments of the present application, the timing advance is adjusted by either open-loop adjustment using at least part of the open-loop adjustment information obtained last time, or closed-loop adjustment using at least part of the closed-loop adjustment information obtained last time. Partial information effectively avoids repeated adjustments to the same time period, improves the accuracy of timing advance, and helps improve the timing synchronization performance of the system.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the system architecture provided by an embodiment of the present application;

Figure 2 is a schematic diagram of an NTN system provided by an embodiment of the present application;

Figure 3 is a schematic diagram of a TN system provided by an embodiment of the present application;

Figure 4 is a schematic diagram of timing advance adjustment provided by an embodiment of the present application;

Figure 5 is a schematic diagram of uplink and downlink timing adjustment provided by an embodiment of the present application;

Figure 6 is a flow chart of an uplink transmission method provided by an embodiment of the present application;

Figure 7 is a schematic diagram of uplink transmission provided by an embodiment of the present application;

Figure 8 is a schematic diagram of adjusting the timing advance provided by another embodiment of the present application;

Figure 9 is a block diagram of an uplink transmission device provided by an embodiment of the present application;

Figure 10 is a structural block diagram of a terminal device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The system architecture and business scenarios described in the embodiments of this application are to more clearly explain the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Persons of ordinary skill in the art will know that as the system evolves With the evolution and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

Please refer to Figure 1, which shows a schematic diagram of a system architecture provided by an embodiment of the present application. The system architecture may include: network device 10 and terminal device 20.

The network device 10 is a device used to provide wireless communication services to the terminal device 20 . A connection can be established between the network device 10 and the terminal device 20 through an air interface, so that communication, including signaling and data interaction, can be performed through the connection. The number of network devices 10 may be multiple, and communication between two adjacent network devices 10 may also be carried out in a wired or wireless manner. The terminal device 20 can switch between different network devices 10 , that is, establish connections with different network devices 10 .

In an example, as shown in Figure 2, taking the NTN system as an example, the network device 10 in the NTN system may be a satellite 11. A satellite 11 can cover a certain range of ground area and provide wireless communication services to terminal devices 20 on the ground area. In addition, the satellite 11 can orbit the earth, and by deploying multiple satellites 11, communication coverage of different areas on the earth's surface can be achieved.

Compared with terrestrial cellular communication networks, satellite communications have many unique advantages. First of all, satellite communication is not restricted by the user's geographical area. For example, general land communication cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be installed or where communication coverage is not available due to sparse population. However, for satellite communication, due to a satellite Satellites can cover a large area of the ground, and satellites can orbit the earth. Therefore, in theory, every corner of the earth can be covered by satellite communications. Secondly, satellite communications have great social value. Satellite communications can cover remote mountainous areas and poor and backward countries or regions at a lower cost, allowing people in these areas to enjoy advanced voice communications and mobile Internet technologies, which is conducive to narrowing the digital gap with developed areas and promoting these regional development. Thirdly, satellite communication has a long distance, and as the communication distance increases, the cost of communication does not increase significantly; finally, satellite communication has high stability and is not restricted by natural disasters.

Optionally, communication satellites are divided into LEO (Low-Earth Orbit, low Earth orbit) satellites, MEO (Medium-Earth Orbit, medium Earth orbit) satellites, and GEO (Geostationary Earth Orbit, geosynchronous orbit) satellites according to different orbital altitudes. , HEO (High Elliptical Orbit, high elliptical orbit) satellite and so on. At the current stage, the main research is on LEO and GEO.

1. LEO.

The altitude range of low-orbit satellites is 500km (kilometers) to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between users is generally less than 20ms (milliseconds). The maximum satellite visibility time is 20 minutes. The signal propagation distance is short, the link loss is small, and the transmission power requirements of the user terminal are not high.

2. GEO.

A geosynchronous orbit satellite with an orbital altitude of 35,786km and a rotation period of 24 hours around the earth. The signal propagation delay for single-hop communication between users is generally 250ms.

In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. One satellite can form dozens or even hundreds of beams to cover the ground; one satellite beam can cover dozens to hundreds of kilometers in diameter. Ground area.

In another example, as shown in FIG. 3 , taking a TN system as an example, the network device 10 in the TN system may be a base station 12 . The base station 12 is a device deployed in the access network to provide wireless communication functions for the terminal device 20 . The base station 12 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, in NR (New Radio) systems, they are called gNodeB or gNB.

As communications technology evolves, the name "network device" may change. For convenience of description, in the embodiment of the present application, devices that provide wireless communication functions for the terminal equipment 20 are collectively called base stations. It should be understood that the NTN system includes two transmission modes: transparent forwarding and regenerative forwarding. In the regenerative forwarding transmission mode, the satellite has all or part of the base station functions.

In addition, the terminal device 20 involved in the embodiment of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of users. Equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal equipment (Terminal Device), etc. For convenience of description, in the embodiments of this application, the above-mentioned devices are collectively referred to as terminal devices.

In order to ensure the time synchronization of uplink and downlink on the network side, 3GPP proposed a timing advance mechanism. The timing advance mechanism is generally used for the uplink transmission of terminal equipment. In order to ensure that the uplink data packets transmitted by the terminal equipment arrive at the network side at the expected time, the timing advance mechanism is advanced according to the estimated radio frequency transmission delay caused by distance, etc. time to send uplink packets. Under the timing advance mechanism, the system frame in which the terminal device sends the uplink data packet is advanced by a certain time compared to the corresponding downlink frame, thereby ensuring that the network side correctly receives the uplink data packet sent by the terminal device.

In the TN system, the specific timing advance is calculated by the network side based on the random access preamble or other uplink signals sent by the terminal device, and then the network side notifies the terminal device through the timing advance command (TAC), so that the terminal device The timing advance can be learned, and uplink transmission can be performed in advance according to the timing advance notified by the network side. Among them, during the initial access period, the timing advance amount N _TA is calculated by N _TA = T _A *16*64/2 ^μ , and T _A is equal to 0, 1, 2, ..., 3846; in other cases, the timing advance The quantity N _TA is calculated by N _TA-new = N _TA-old + ( _TA -31)*16*64/2 ^μ , and T _A is equal to 0, 1, 2,..., 63.

Different from the TA system, due to the large delay between the terminal equipment and the network side in the NTN system, the timing advance determination method in the TN system is not fully applicable to the NTN system. In the related art, the timing advance in the NTN system is obtained through a combination of open-loop adjustment and closed-loop adjustment. In the embodiment of the present application, the open-loop adjustment includes using the position of the terminal device and the ephemeris of the satellite. The delay between information, satellites and reference points is adjusted; closed-loop adjustment includes using TAC to adjust. However, precisely because of the large time delay in the NTN system, in the adjustment mechanism that combines open-loop adjustment and closed-loop adjustment, there will be situations where both open-loop adjustment and closed-loop adjustment are adjusted for the same time period, which will lead to The timing advance amount is double-adjusted, resulting in a large error in the timing advance amount and affecting the timing synchronization performance.

For example, as shown in Figure 4, the terminal equipment needs to perform uplink transmission at both time T1 and time T3. According to the timing advance adjustment method in related technologies, if the timing advance is adjusted at time T3, the time T3 has been obtained. According to the latest open-loop information, the timing advance adjustment at T3 is based on the closed-loop adjustment at T2 and the open-loop adjustment at T3. That is to say, the timing advance T _TA at time T3 is calculated as follows:

T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC .

Among them, T _TA refers to the result of closed-loop adjustment, that is, the delay obtained by the terminal device based on TAC; N _{TA, UE-specific} refers to the delay estimated by the terminal device on the service link; N _{TA, common} refers to the network side The delay between the controlled satellite and the reference point may also include some timing offsets on the network side; N _TA,offset refers to the fixed offset value used to calculate the timing advance; T _C refers to the predefined communication protocol unit of time.

Based on the above adjustment method of timing advance, as shown in Figure 4, the closed-loop adjustment at time T2 may adjust the time period between time T1 and time T2. During the open-loop adjustment at time T3, if the time period at time T3 is updated, Open-loop information, then at time T3 it is equivalent to adjusting the open-loop information at time T1, and the time period between time T1 and time T3 includes the time period between time T1 and time T2, that is to say, time T3 Both the open-loop adjustment and the closed-loop adjustment at T2 will adjust the time period between T1 and T2, resulting in repeated adjustments, resulting in excessive adjustment of the timing advance, and adjustment errors may occur. This will cause the uplink and downlink timing on the network side to be misaligned, causing timing errors.

For example, as shown in Figure 5, the effect of correctly adjusting the uplink and downlink timing should be that the uplink (Uplink) reception time on the network side is aligned with the downlink (DL, Downlink) transmission time. If the terminal device performs closed-loop adjustment and open-loop adjustment for the same time period, the timing advance amount will be too large, as shown in Figure 5, causing the terminal device to perform uplink transmission more time in advance, so that the UL on the network side The receiving time and the DL sending time cannot be aligned, causing timing errors.

Based on this, embodiments of the present application provide an uplink transmission method, which can be used to solve the above technical problems, avoid repeated adjustments to the timing advance, and improve the accuracy of the timing advance. Below, the technical solution provided by this application will be introduced and explained with reference to several embodiments.

Please refer to Figure 6, which shows a flow chart of an uplink transmission method provided by an embodiment of the present application. The method can be applied to the system architecture shown in Figures 1 to 3. The method can include the following steps: At least some of the steps.

Step 610: Adjust the timing advance based on the adjustment information to obtain an adjusted timing advance.

The terminal device adjusts the timing advance based on the adjustment information. In the embodiments of this application, the information used to adjust the timing advance is called adjustment information. In other words, the embodiments of this application do not limit the content of the adjustment information. Optionally, the adjustment information includes at least one of the following: open-loop adjustment information. , closed-loop adjustment information, fixed offset value (such as N _TA,offset above).

Open-loop adjustment information refers to the information used by the terminal device during open-loop adjustment. It is used by the terminal device to estimate the delay on the service link. In the embodiment of the present application, the open-loop adjustment information can also be used by the terminal device to adjust the satellite and reference The delay between points; the closed-loop adjustment information refers to the information used by the terminal device in closed-loop adjustment, and is used by the terminal device to obtain the delay calculated by the network side. The embodiments of this application do not limit the contents of the open-loop adjustment information and the closed-loop adjustment information. Optionally, the open-loop adjustment information includes at least one of the following: GNSS (Global Navigation Satellite System, global satellite navigation system) information, ephemeris information , first delay information, the first delay information is used to indicate the delay between the reference point and the satellite; optionally, the closed-loop adjustment information includes: timing advance command (TAC).

It should be understood that in the embodiment of the present application, except for the fixed offset value, the parts of the timing advance adjustment information that do not belong to the closed-loop adjustment information can be considered as open-loop adjustment information. That is to say, in the embodiment of the present application, Open-loop adjustment is not limited to the terminal device’s estimation of the delay between the terminal device and the satellite, but also includes the delay between the satellite controlled by the network side and the reference point. For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , N _TA,offset is a fixed offset value, and N _TA is closed-loop adjustment information, N _{TA, UE-specific} and N _{TA, common} are open-loop adjustment information.

When the adjustment information includes open-loop adjustment information and closed-loop adjustment information, the above-mentioned terminal device adjusts the timing advance based on the adjustment information, including: open-loop adjustment of the timing advance based on the open-loop adjustment information, and based on the closed-loop adjustment information Make closed-loop adjustments to timing advance. The open-loop adjustment may be performed before the closed-loop adjustment, may be performed after the closed-loop adjustment, or may be performed simultaneously with the closed-loop adjustment, which is not limited in the embodiments of the present application.

In order to avoid the terminal device repeatedly adjusting the timing advance, under the scheme of combining open-loop adjustment and closed-loop adjustment, in the embodiment of the present application, the terminal device either uses at least part of the information in the open-loop adjustment information obtained last time , or use at least part of the information in the closed-loop adjustment information obtained last time. That is to say, the adjustment information includes first adjustment information or second adjustment information, wherein the first adjustment information includes at least part of the open-loop adjustment information obtained last time, and the second adjustment information includes the closed-loop adjustment information obtained last time. Adjust at least some of the information in the message.

In the case where the terminal device uses at least part of the information in the open-loop adjustment information obtained last time to perform open-loop adjustment, the closed-loop adjustment may use the closed-loop adjustment information obtained this time. That is, in one example, the above step 620 includes : When the adjustment information includes the first adjustment information, the timing advance is adjusted based on the first adjustment information and the third adjustment information to obtain the adjusted timing advance; the third adjustment information includes the closed loop obtained this time Adjust information.

In the case where the terminal device uses at least part of the information in the closed-loop adjustment information obtained last time for closed-loop adjustment, the open-loop adjustment can use the open-loop adjustment information obtained this time. That is, in one example, the above step 620 includes : When the adjustment information includes the second adjustment information, the timing advance is adjusted based on the second adjustment information and the fourth adjustment information to obtain the adjusted timing advance; the fourth adjustment information includes the start value obtained this time. ring adjustment information.

For other introduction to the adjustment process of the timing advance, please refer to the following embodiments, which will not be described again here.

Step 620: Perform uplink transmission based on the adjusted timing advance.

Through the above step 610, the terminal device can obtain the adjusted timing advance, and perform uplink transmission based on the adjusted timing advance. Among them, uplink transmission includes sending uplink data packets. For example, the terminal device advances the uplink transmission with an adjusted timing advance relative to the downlink frame on the network side to ensure that the system frame of the uplink transmission arriving at the network side is aligned with the corresponding downlink frame.

In one example, it is assumed that the time when the terminal device last performed uplink transmission is the fifth time, the time of the closed-loop adjustment corresponding to the uplink transmission performed by the terminal device this time is the sixth time, and the time corresponding to the uplink transmission performed by the terminal device is the sixth time. The open-loop adjustment time is the seventh time, and the seventh time is the time after the sixth time, and the sixth time is the time after the fifth time, as shown in Figure 7, then, the terminal device performs the adjustment at the sixth time One closed-loop adjustment and one open-loop adjustment at the seventh moment to determine the timing advance used when executing this uplink transmission at the seventh moment.

Wherein, the time between the fifth moment and the sixth moment is greater than or equal to the second delay information. The second delay information is used to indicate the delay between the terminal equipment and the base station, such as round trip delay (Round Trip Time, RTT). Optionally, the second delay information is any one of the following: the second delay information at the fifth time (the second delay information at the last time the uplink transmission was performed), the second delay information at the sixth time (this time the second delay information corresponding to the closed-loop adjustment time corresponding to the first execution of uplink transmission), and the second delay information used to determine the RAR Window (Random Access Response Window, random access response window).

In summary, the technical solution provided by the embodiments of this application adjusts the timing advance by combining open-loop adjustment and closed-loop adjustment, and is suitable for uplink transmission of terminal equipment in the NTN system, ensuring uplink and downlink time synchronization on the network side. Moreover, in the embodiments of the present application, the timing advance is adjusted by either open-loop adjustment using at least part of the open-loop adjustment information obtained last time, or closed-loop adjustment using at least part of the closed-loop adjustment information obtained last time. Partial information effectively avoids repeated adjustments to the same time period, improves the accuracy of timing advance, and helps improve the timing synchronization performance of the system.

As can be seen from the above embodiments, in a solution that combines open-loop adjustment and closed-loop adjustment, the terminal device either uses at least part of the last open-loop adjustment information obtained during the open-loop adjustment, or uses the last information during the closed-loop adjustment. At least part of the obtained closed-loop adjustment information. Below, several possible situations are introduced and explained.

First, it is introduced that the terminal device adopts at least part of the information in the open-loop adjustment information obtained last time.

In one example, the first adjustment information includes: ephemeris information, GNSS information, and first delay information; the first delay information is used to indicate the delay between the reference point and the satellite.

Wherein, the first adjustment information includes at least part of the information in the open-loop adjustment information obtained last time, so combined with this example, at least part of the information in the ephemeris information, GNSS information, and first delay information in the first adjustment information, It is in the open-loop adjustment information obtained last time. For example, the GNSS in the first adjustment information is the GNSS information in the open-loop adjustment information obtained last time, or the ephemeris information in the first adjustment information is the ephemeris information in the open-loop adjustment information obtained last time, or , the first delay information in the first adjustment information is the first delay information in the open-loop adjustment information obtained last time, or the ephemeris information and GNSS information in the first adjustment information are the open-loop information obtained last time The ephemeris information and GNSS information in the adjustment information, or the ephemeris information, GNSS information and first delay information in the first adjustment information are the ephemeris information, GNSS information and the first delay information in the open-loop adjustment information obtained last time. One time delay information.

Based on this, it is assumed that the ephemeris information in the first adjustment information is obtained by the terminal device at the first time, the GNSS information in the first adjustment information is obtained by the terminal device at the second time, and the ephemeris information in the first adjustment information is obtained by the terminal device at the second time. The first delay information is obtained by the terminal device at the third moment. Then, the acquisition time of each information in the first adjustment information includes the following situations.

(1) The first time is the last time the ephemeris information in the open-loop adjustment information was obtained, the second time is the time the GNSS information in the open-loop adjustment information was obtained this time, and the third time is the time the open-loop adjustment information was obtained this time. The first delay in the message is the moment of the message.

That is to say, the ephemeris information in the first adjustment information is the ephemeris information in the open-loop adjustment information obtained last time, and the GNSS information in the first adjustment information is the GNSS information in the open-loop adjustment information obtained this time. The first delay information in the first adjustment information is the first delay information in the open-loop adjustment information obtained this time. Then, when the terminal device adjusts the timing advance, the open-loop adjustment uses the ephemeris information in the open-loop adjustment information obtained last time, the GNSS information in the open-loop adjustment information obtained this time, and the first time extension information, the closed-loop adjustment uses the closed-loop adjustment information obtained this time, for example, as shown in Figure 8(a).

For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , where the adjustment of N _{TA,UE-specific} is the one obtained last time The ephemeris information in the open-loop adjustment information and the GNSS information in the open-loop adjustment information obtained this time; the adjustment of N _TA uses the closed-loop adjustment information obtained this time; the adjustment of N _{TA, common} uses the information obtained this time. The first delay information in the open-loop adjustment information. Based on this, T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC can be updated as: T _TA =(N _TA +N _{TA,UE-specific,old} + N _TA,common +N _TA,offset )×T _C .

It should be understood that in (1), the first moment is the moment before the second moment and the third moment, and the second moment and the third moment can be either the same moment or different moments. For example, the second moment is the moment before the third moment, or the second moment is the moment after the third moment.

(2) The first moment is the moment when the ephemeris information in the open-loop adjustment information is acquired this time, the second moment is the moment when the GNSS information in the open-loop adjustment information was acquired last time, and the third moment is the moment when the open-loop adjustment information is acquired this time. The first delay in the message is the moment of the message.

That is to say, the ephemeris information in the first adjustment information is the ephemeris information in the open-loop adjustment information obtained this time, and the GNSS information in the first adjustment information is the GNSS information in the open-loop adjustment information obtained last time. The first delay information in the first adjustment information is the first delay information in the open-loop adjustment information obtained this time. Then, when the terminal device adjusts the timing advance, the open-loop adjustment uses the GNSS information in the open-loop adjustment information obtained last time, the ephemeris information in the open-loop adjustment information obtained this time, and the first time extension information, the closed-loop adjustment uses the closed-loop adjustment information obtained this time, for example, as shown in Figure 8(b).

For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , where the adjustment of N _{TA,UE-specific} is the last one obtained The GNSS information in the open-loop adjustment information and the ephemeris information in the open-loop adjustment information obtained this time; the adjustment of N _TA uses the closed-loop adjustment information obtained this time; the adjustment of N _{TA, common} uses the information obtained this time. The first delay information in the open-loop adjustment information. Based on this, T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC can be updated as: T _TA =(N _TA +N _{TA,UE-specific,old} + N _TA,common +N _TA,offset )×T _C .

It should be understood that in (2), the second moment is the moment before the first moment and the third moment, and the first moment and the third moment may be the same moment or different moments. For example, the first moment is the moment before the third moment, or the first moment is the moment after the third moment.

(3) The first moment is the last time the ephemeris information in the open-loop adjustment information was obtained, the second moment is the last time the GNSS information in the open-loop adjustment information was obtained, and the third moment is the time the open-loop adjustment information was obtained this time. The first delay in the message is the moment of the message.

That is to say, the ephemeris information in the first adjustment information is the ephemeris information in the open-loop adjustment information obtained last time, and the GNSS information in the first adjustment information is the GNSS information in the open-loop adjustment information obtained last time, The first delay information in the first adjustment information is the first delay information in the open-loop adjustment information obtained this time. Then, when the terminal device adjusts the timing advance, the open-loop adjustment uses the GNSS information and ephemeris information in the open-loop adjustment information obtained last time, and the first time in the open-loop adjustment information obtained this time. Delay information, the closed-loop adjustment uses the closed-loop adjustment information obtained this time.

For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , where the adjustment of N _{TA,UE-specific} is the one obtained last time The GNSS information and ephemeris information in the open-loop adjustment information; the adjustment of N _TA uses the closed-loop adjustment information obtained this time; the adjustment of N _{TA, common} uses the first moment of the open-loop adjustment information obtained this time delay information. Based on this, T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC can be updated as: T _TA =(N _TA +N _{TA,UE-specific,old} + N _TA,common +N _TA,offset )×T _C .

It should be understood that in (3), the first moment and the second moment are moments before the third moment, and the first moment and the second moment may be the same moment or different moments. For example, the first moment is the moment before the second moment, or the first moment is the moment after the second moment.

(4) The first moment is the moment when the ephemeris information in the open-loop adjustment information is obtained this time, the second moment is the moment when the GNSS information in the open-loop adjustment information is obtained this time, and the third moment is the last time the open-loop adjustment information was obtained The first delay in the message is the moment of the message.

That is to say, the ephemeris information in the first adjustment information is the ephemeris information in the open-loop adjustment information obtained this time, and the GNSS information in the first adjustment information is the GNSS information in the open-loop adjustment information obtained this time. The first delay information in the first adjustment information is the first delay information in the last acquired open-loop adjustment information. Then, when the terminal device adjusts the timing advance, the open-loop adjustment uses the GNSS information and ephemeris information in the open-loop adjustment information obtained this time, and the first time in the open-loop adjustment information obtained last time. extension information, the closed-loop adjustment uses the closed-loop adjustment information obtained this time, for example, as shown in Figure 8(c).

For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , where the adjustment of N _{TA,UE-specific} is obtained this time. The GNSS information and ephemeris information in the open-loop adjustment information; the adjustment of N _TA uses the closed-loop adjustment information obtained this time; the adjustment of N _{TA, common} uses the first moment of the open-loop adjustment information obtained last time delay information. Based on this, T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC can be updated as: T _TA =(N _TA +N _{TA,UE-specific} +N _{TA ,common,old} +N _TA,offset )×T _C .

It should be understood that in (4), the third moment is the moment before the first moment and the second moment, and the first moment and the third moment may be the same moment or different moments. For example, the first moment is the moment before the third moment, or the first moment is the moment after the third moment.

Secondly, it is introduced that the terminal device uses at least part of the information in the closed-loop adjustment information obtained last time.

In one example, the second adjustment information includes: a timing advance command.

Wherein, the second adjustment information includes at least part of the information in the closed-loop adjustment information obtained last time, so combined with this example, the timing advance command in the second adjustment information is in the closed-loop adjustment information obtained last time. Based on this, assuming that the timing advance command in the second adjustment information is obtained by the terminal device at the fourth time, then the fourth time is the last time the timing advance command in the closed-loop adjustment information is obtained. In this example, since the closed-loop adjustment uses at least part of the information in the closed-loop adjustment information obtained last time, the open-loop adjustment uses various information in the open-loop adjustment information obtained this time, for example, as shown in Figure 8 (d) is shown.

For example, for T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC , where the adjustment of N _{TA,UE-specific} is obtained this time. The GNSS information and ephemeris information in the open-loop adjustment information; the adjustment of N _TA uses the closed-loop adjustment information obtained last time; the adjustment of N _{TA, common} uses the first moment of the open-loop adjustment information obtained this time delay information. Based on this, T _TA =(N _TA +N _{TA,UE-specific} +N _TA,common +N _TA,offset )× _TC can be updated as: T _TA =(N _TA,old +N _{TA,UE-specific} + N _TA,common +N _TA,offset )×T _C .

It should be noted that in the embodiment of the present application, the relationship between the acquisition times of various pieces of information in the open-loop adjustment information acquired at the same time is not limited. Optionally, the relationship between the acquisition times of the open-loop adjustment information acquired at the same time is not limited. The ephemeris information and the GNSS information are obtained by the terminal device at the same time; or the ephemeris information and the first delay information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time. ; or, the first delay information and GNSS information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time; or, the ephemeris in the open-loop adjustment information obtained at the same time Information, GNSS information and first delay information are obtained by the terminal device at the same time.

To sum up, the technical solution provided by the embodiments of this application provides a variety of possible combination implementation solutions for the adjustment method that combines open-loop adjustment and closed-loop adjustment, which helps to flexibly realize the adjustment of the timing advance.

The following are device embodiments of the present application, which can be used to execute method embodiments of the present application. For details not disclosed in the device embodiments of this application, please refer to the method embodiments of this application.

Please refer to FIG. 9 , which shows a block diagram of an uplink transmission device provided by an embodiment of the present application. The device has the function of implementing the above example of the uplink transmission method. The function can be implemented by hardware, or can also be implemented by hardware executing corresponding software. The device may be the terminal equipment mentioned above, or may be provided in the terminal equipment. As shown in Figure 9, the device 900 may include: an adjustment module 910 and a transmission module 920.

The adjustment module 910 is configured to adjust the timing advance based on the adjustment information to obtain an adjusted timing advance; wherein the adjustment information includes first adjustment information or second adjustment information, and the first adjustment information includes the last At least part of the information in the obtained open-loop adjustment information, the second adjustment information includes at least part of the information in the closed-loop adjustment information obtained last time.

The transmission module 920 is configured to perform uplink transmission based on the adjusted timing advance.

In one example, the first adjustment information includes: ephemeris information, GNSS information, and first delay information; the first delay information is used to indicate the delay between the reference point and the satellite.

In one example, the ephemeris information in the first adjustment information is obtained by the terminal device at the first moment, and the GNSS information in the first adjustment information is obtained by the terminal device at the first moment. The first delay information in the first adjustment information was obtained by the terminal device at the third time; the first time was the last time the open-loop adjustment information was obtained. The time of the ephemeris information, the second time is the time when the GNSS information in the open-loop adjustment information is obtained this time, and the third time is the time when the GNSS information in the open-loop adjustment information is obtained this time. The time of the first delay information; or, the first time is the time when the ephemeris information in the open-loop adjustment information is obtained this time, and the second time is the last time the open-loop adjustment information is obtained. The time at which the GNSS information in the adjustment information is adjusted, the third time is the time at which the first delay information in the open-loop adjustment information is obtained this time; or the first time is the time at which the first delay information in the open-loop adjustment information is obtained last time. The time when the ephemeris information in the open-loop adjustment information is obtained, the second time is the time when the GNSS information in the open-loop adjustment information was last obtained, and the third time is when the GNSS information in the open-loop adjustment information is obtained this time. The time of the first delay information in the open-loop adjustment information; or, the first time is the time when the ephemeris information in the open-loop adjustment information is obtained this time, and the second time is the time when the ephemeris information in the open-loop adjustment information is obtained this time. The time at which the GNSS information in the open-loop adjustment information is acquired for the first time, and the third time is the last time at which the first delay information in the open-loop adjustment information is acquired.

In one example, the adjustment module 910 is configured to: when the adjustment information includes the first adjustment information, adjust the timing advance based on the first adjustment information and the third adjustment information. Adjust to obtain the adjusted timing advance; the third adjustment information includes the closed-loop adjustment information obtained this time.

In one example, the second adjustment information includes: a timing advance command.

In one example, the timing advance command in the second adjustment information was obtained by the terminal device at a fourth time; the fourth time was the last time the timing in the closed-loop adjustment information was obtained. A time for advance orders.

In one example, the adjustment module 910 is configured to: when the adjustment information includes the second adjustment information, adjust the timing advance based on the second adjustment information and the fourth adjustment information. Adjust to obtain the adjusted timing advance; the fourth adjustment information includes the open-loop adjustment information obtained this time.

In one example, the ephemeris information and GNSS information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time; or, the open-loop adjustment information obtained at the same time The ephemeris information and the first delay information in the information are obtained by the terminal device at the same time; or the first delay information and the GNSS information in the open-loop adjustment information are obtained at the same time, are obtained by the terminal device at the same time; or, the ephemeris information, GNSS information and first delay information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time obtained.

In one example, the last time the terminal device performed uplink transmission was the fifth time, and the time of the closed-loop adjustment corresponding to the uplink transmission performed by the terminal device this time was the sixth time; the fifth time and the The duration between the sixth moment is greater than or equal to the second delay information, and the second delay information is used to indicate the delay between the terminal device and the base station.

In one example, the second delay information is any one of the following: the second delay information at the fifth time, the second delay information at the sixth time, used to determine RAR The second delay information of the window.

In summary, the technical solution provided by the embodiments of this application adjusts the timing advance by combining open-loop adjustment and closed-loop adjustment, and is suitable for uplink transmission of terminal equipment in the NTN system, ensuring uplink and downlink time synchronization on the network side. Moreover, in the embodiments of the present application, the timing advance is adjusted by either open-loop adjustment using at least part of the open-loop adjustment information obtained last time, or closed-loop adjustment using at least part of the closed-loop adjustment information obtained last time. Partial information effectively avoids repeated adjustments to the same time period, improves the accuracy of timing advance, and helps improve the timing synchronization performance of the system.

It should be noted that when the device provided in the above embodiment implements its functions, only the division of the above functional modules is used as an example. In practical applications, the above functions can be allocated to different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Please refer to FIG. 10 , which shows a schematic structural diagram of a terminal device 100 provided by an embodiment of the present application. For example, the terminal device can be used to perform the above uplink transmission method on the terminal device side. Specifically, the terminal device 100 may include: a processor 101, and a transceiver 102 connected to the processor 101.

The processor 101 includes one or more processing cores. The processor 101 executes various functional applications and information processing by running software programs and modules.

Transceiver 102 includes a receiver and a transmitter. Optionally, the transceiver 102 is a communication chip.

In one example, the terminal device 100 further includes: a memory and a bus. The memory is connected to the processor via a bus. The memory can be used to store a computer program, and the processor is used to execute the computer program to implement various steps performed by the terminal device in the above method embodiments.

In addition, the memory can be implemented by any type of volatile or non-volatile storage device or their combination. Volatile or non-volatile storage devices include but are not limited to: RAM (Random-Access Memory) and ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory) ), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory, read-only disc), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cassette, tape, disk storage or other magnetic storage device.

The processor 101 is configured to adjust the timing advance based on the adjustment information to obtain an adjusted timing advance; wherein the adjustment information includes first adjustment information or second adjustment information, and the first adjustment information includes At least part of the information in the open-loop adjustment information obtained last time, and the second adjustment information includes at least part of the information in the closed-loop adjustment information obtained last time.

The transceiver 102 is configured to perform uplink transmission based on the adjusted timing advance.

In one example, the first adjustment information includes: ephemeris information, GNSS information, and first delay information; the first delay information is used to indicate the delay between the reference point and the satellite.

In one example, the ephemeris information in the first adjustment information is obtained by the terminal device at the first moment, and the GNSS information in the first adjustment information is obtained by the terminal device at the first moment. The first delay information in the first adjustment information was obtained by the terminal device at the third time; the first time was the last time the open-loop adjustment information was obtained. The time of the ephemeris information, the second time is the time when the GNSS information in the open-loop adjustment information is obtained this time, and the third time is the time when the GNSS information in the open-loop adjustment information is obtained this time. The time of the first delay information; or, the first time is the time when the ephemeris information in the open-loop adjustment information is obtained this time, and the second time is the last time the open-loop adjustment information is obtained. The time at which the GNSS information in the adjustment information is adjusted, the third time is the time at which the first delay information in the open-loop adjustment information is obtained this time; or the first time is the time at which the first delay information in the open-loop adjustment information is obtained last time. The time when the ephemeris information in the open-loop adjustment information is obtained, the second time is the time when the GNSS information in the open-loop adjustment information was last obtained, and the third time is when the GNSS information in the open-loop adjustment information is obtained this time. The time of the first delay information in the open-loop adjustment information; or, the first time is the time when the ephemeris information in the open-loop adjustment information is obtained this time, and the second time is the time when the ephemeris information in the open-loop adjustment information is obtained this time. The time at which the GNSS information in the open-loop adjustment information is acquired for the first time, and the third time is the last time at which the first delay information in the open-loop adjustment information is acquired.

In one example, the processor 101 is configured to: when the adjustment information includes the first adjustment information, perform an adjustment on the timing advance based on the first adjustment information and the third adjustment information. Adjust to obtain the adjusted timing advance; the third adjustment information includes the closed-loop adjustment information obtained this time.

In one example, the second adjustment information includes: a timing advance command.

In one example, the timing advance command in the second adjustment information was obtained by the terminal device at a fourth time; the fourth time was the last time the timing in the closed-loop adjustment information was obtained. A time for advance orders.

In one example, the processor 101 is configured to: when the adjustment information includes the second adjustment information, perform an adjustment on the timing advance based on the second adjustment information and the fourth adjustment information. Adjust to obtain the adjusted timing advance; the fourth adjustment information includes the open-loop adjustment information obtained this time.

In one example, the ephemeris information and GNSS information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time; or, the open-loop adjustment information obtained at the same time The ephemeris information and the first delay information in the information are obtained by the terminal device at the same time; or the first delay information and the GNSS information in the open-loop adjustment information are obtained at the same time, are obtained by the terminal device at the same time; or, the ephemeris information, GNSS information and first delay information in the open-loop adjustment information obtained at the same time are obtained by the terminal device at the same time obtained.

In one example, the last time the terminal device performed uplink transmission was the fifth time, and the time of the closed-loop adjustment corresponding to the uplink transmission performed by the terminal device this time was the sixth time; the fifth time and the The duration between the sixth moment is greater than or equal to the second delay information, and the second delay information is used to indicate the delay between the terminal device and the base station.

In one example, the second delay information is any one of the following: the second delay information at the fifth time, the second delay information at the sixth time, used to determine RAR The second delay information of the window.

Embodiments of the present application also provide a computer-readable storage medium. A computer program is stored in the storage medium. The computer program is used to be executed by a processor of a terminal device to implement the above-mentioned uplink transmission method on the terminal device side. .

Embodiments of the present application also provide a chip, which includes programmable logic circuits and/or program instructions. When the chip is run on a terminal device, it is used to implement the above uplink transmission method on the terminal device side.

Embodiments of the present application also provide a computer program product, which when the computer program product is run on a terminal device, is used to implement the above uplink transmission method on the terminal device side.

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

The above are only exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (24)

1. An uplink transmission method, which is characterized by being applied to a terminal device, comprises the following steps:

   Adjusting the timing advance based on the adjustment information to obtain an adjusted timing advance;

   based on the adjusted timing advance, performing uplink transmission;

   the adjustment information comprises first adjustment information or second adjustment information, the first adjustment information comprises at least part of the last acquired open-loop adjustment information, and the second adjustment information comprises at least part of the last acquired closed-loop adjustment information.
2. The method of claim 1, wherein the first adjustment information comprises: ephemeris information, global Navigation Satellite System (GNSS) information, first delay information; the first delay information is used to indicate a delay between the reference point and the satellite.
3. The method of claim 2, wherein the ephemeris information in the first adjustment information is acquired by the terminal device at a first time, the GNSS information in the first adjustment information is acquired by the terminal device at a second time, and the first delay information in the first adjustment information is acquired by the terminal device at a third time;

   the first time is the time when the ephemeris information in the open-loop adjustment information is acquired last time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired this time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

   Or,

   the first time is the time when the ephemeris information in the open-loop adjustment information is acquired this time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired last time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

   or,

   the first time is the time when the ephemeris information in the open-loop adjustment information is acquired last time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired last time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

   or,

   the first time is the time when the ephemeris information in the open-loop adjustment information is acquired this time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired this time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired last time.
4. A method according to any one of claims 1 to 3, wherein adjusting the timing advance based on the adjustment information results in an adjusted timing advance, comprising:

   When the adjustment information comprises the first adjustment information, adjusting the timing advance based on the first adjustment information and the third adjustment information to obtain the adjusted timing advance; the third adjustment information comprises the closed loop adjustment information acquired this time.
5. The method of claim 1, wherein the second adjustment information comprises: a timing advance command.
6. The method of claim 5, wherein the timing advance command in the second adjustment information is acquired by the terminal device at a fourth time instant;

   the fourth time is a time at which the timing advance command in the closed-loop adjustment information was last acquired.
7. The method of any one of claims 1, 5, and 6, wherein adjusting the timing advance based on the adjustment information results in an adjusted timing advance, comprising:

   when the adjustment information comprises the second adjustment information, adjusting the timing advance based on the second adjustment information and fourth adjustment information to obtain the adjusted timing advance; the fourth adjustment information comprises the acquired open loop adjustment information.
8. The method according to any one of claims 1 to 7, wherein,

   ephemeris information and GNSS information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

   or,

   the ephemeris information and the first delay information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

   or,

   the first delay information and the GNSS information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

   or,

   the ephemeris information, the GNSS information and the first time delay information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment.
9. The method according to any one of claims 1 to 8, wherein the time when the terminal device last performed uplink transmission is a fifth time, and the time when the terminal device currently performed uplink transmission corresponds to closed loop adjustment is a sixth time;

   the duration between the fifth time and the sixth time is greater than or equal to second delay information, where the second delay information is used to indicate a delay between the terminal device and the base station.
10. The method of claim 9, wherein the second delay information is any one of: the second delay information at the fifth time, the second delay information at the sixth time, and the second delay information for determining a random access response RAR window.
11. An uplink transmission apparatus, characterized in that it is provided in a terminal device, the apparatus comprising:

    the adjusting module is used for adjusting the timing advance based on the adjusting information to obtain the adjusted timing advance;

    a transmission module, configured to perform uplink transmission based on the adjusted timing advance;

    the adjustment information comprises first adjustment information or second adjustment information, the first adjustment information comprises at least part of the last acquired open-loop adjustment information, and the second adjustment information comprises at least part of the last acquired closed-loop adjustment information.
12. The apparatus of claim 11, wherein the first adjustment information comprises: ephemeris information, global Navigation Satellite System (GNSS) information, first delay information; the first delay information is used to indicate a delay between the reference point and the satellite.
13. The apparatus of claim 12, wherein the ephemeris information in the first adjustment information is acquired by the terminal device at a first time, the GNSS information in the first adjustment information is acquired by the terminal device at a second time, and the first delay information in the first adjustment information is acquired by the terminal device at a third time;

    the first time is the time when the ephemeris information in the open-loop adjustment information is acquired last time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired this time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

    or,

    the first time is the time when the ephemeris information in the open-loop adjustment information is acquired this time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired last time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

    or,

    the first time is the time when the ephemeris information in the open-loop adjustment information is acquired last time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired last time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired this time;

    Or,

    the first time is the time when the ephemeris information in the open-loop adjustment information is acquired this time, the second time is the time when the GNSS information in the open-loop adjustment information is acquired this time, and the third time is the time when the first delay information in the open-loop adjustment information is acquired last time.
14. The apparatus according to any one of claims 11 to 13, wherein the adjustment module is configured to:

    when the adjustment information comprises the first adjustment information, adjusting the timing advance based on the first adjustment information and the third adjustment information to obtain the adjusted timing advance; the third adjustment information comprises the closed loop adjustment information acquired this time.
15. The apparatus of claim 11, wherein the second adjustment information comprises: a timing advance command.
16. The apparatus of claim 15, wherein the timing advance command in the second adjustment information is acquired by the terminal device at a fourth time instant;

    the fourth time is a time at which the timing advance command in the closed-loop adjustment information was last acquired.
17. The apparatus of any one of claims 11, 15, 16, wherein the adjustment module is configured to:

    when the adjustment information comprises the second adjustment information, adjusting the timing advance based on the second adjustment information and fourth adjustment information to obtain the adjusted timing advance; the fourth adjustment information comprises the acquired open loop adjustment information.
18. The device according to any one of claims 11 to 17, wherein,

    ephemeris information and GNSS information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

    or,

    the ephemeris information and the first delay information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

    or,

    the first delay information and the GNSS information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment;

    or,

    the ephemeris information, the GNSS information and the first time delay information in the same acquired open-loop adjustment information are acquired by the terminal equipment at the same moment.
19. The apparatus according to any one of claims 11 to 18, wherein the time at which the terminal device last performed uplink transmission is a fifth time, and the time at which the terminal device currently performs closed loop adjustment corresponding to uplink transmission is a sixth time;

    the duration between the fifth time and the sixth time is greater than or equal to second delay information, where the second delay information is used to indicate a delay between the terminal device and the base station.
20. The apparatus of claim 19, wherein the second latency information is any one of: the second delay information at the fifth time, the second delay information at the sixth time, and the second delay information for determining a random access response RAR window.
21. A terminal device, characterized in that the terminal device comprises: a processor, and a transceiver coupled to the processor; wherein:

    the processor is used for adjusting the timing advance based on the adjustment information to obtain the adjusted timing advance;

    the transceiver is configured to perform uplink transmission based on the adjusted timing advance;

    the adjustment information comprises first adjustment information or second adjustment information, the first adjustment information comprises at least part of the last acquired open-loop adjustment information, and the second adjustment information comprises at least part of the last acquired closed-loop adjustment information.
22. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program for execution by a processor of a terminal device for implementing the uplink transmission method according to any one of claims 1 to 10.
23. Chip comprising programmable logic circuits and/or program instructions for implementing the uplink transmission method according to any of claims 1 to 10 when said chip is run on a terminal device.
24. A computer program product for implementing the uplink transmission method according to any of claims 1 to 10 when the computer program product is run on a terminal device.