CN115915376A

CN115915376A - Scheduling delay determination method and device

Info

Publication number: CN115915376A
Application number: CN202110888775.7A
Authority: CN
Inventors: 雷珍珠
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2023-04-04
Also published as: WO2023011549A1

Abstract

The application discloses a scheduling delay determining method and device. The method comprises the following steps: the terminal receives first configuration information of a second cell, wherein the first configuration information comprises maximum round-trip delay; acquiring a first round-trip delay; determining a second round-trip time delay of electromagnetic wave transmission between the terminal and a first satellite corresponding to a first cell according to the maximum round-trip time delay and the first round-trip time delay; and determining a second scheduling delay deviant for the terminal to perform uplink transmission with the first cell in the first cell or the coverage range of the first beam in the first cell according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, wherein the second scheduling delay deviant is an additional scheduling delay value for the terminal to perform uplink data transmission with the first cell. A corresponding apparatus is also disclosed. By adopting the scheme of the application, the extra scheduling delay value when the terminal and the first cell perform uplink data transmission can be accurately determined, and the scheduling delay of data transmission is effectively reduced.

Description

Scheduling delay determination method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a scheduling delay determining method and apparatus.

Background

In a non-global navigation satellite system (non-GNSS) scenario (that is, a terminal does not have GNSS capability and cannot acquire its own location information), the terminal cannot report a Timing Advance (TA) value/location information to update an extra scheduling delay offset value (K _ offset) when the terminal performs uplink data transmission with a cell. The network cannot update the K _ offset according to the TA/location information reported by the terminal in the connected state. The network can only use the K _ offset at the cell level or the uplink scheduling delay offset value (beam specific K _ offset) of a specific beam for data scheduling, which results in a large scheduling transmission delay.

Disclosure of Invention

The application provides a scheduling delay determining method and device, which are used for effectively reducing the scheduling delay of data transmission.

In a first aspect, a method for determining scheduling delay is provided, where the method includes:

a terminal receives first configuration information of a second cell, wherein the first configuration information comprises maximum round-trip delay;

the terminal acquires a first round-trip delay;

the terminal determines a second round-trip delay of electromagnetic wave transmission between the terminal and a first satellite corresponding to a first cell according to the maximum round-trip delay and the first round-trip delay;

and the terminal determines a second scheduling delay deviant for uplink transmission between the terminal and the first cell in the first cell or within the coverage range of the first beam in the first cell according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, wherein the second scheduling delay deviant is an additional scheduling delay value for uplink data transmission between the terminal and the first cell.

In one possible implementation, the maximum round trip delay is a round trip delay of electromagnetic wave transmission between a position farthest from a second satellite corresponding to the second cell within a coverage area of the second cell or a second beam in the second cell and the second satellite corresponding to the second cell;

the first round trip delay is a round trip delay of electromagnetic wave transmission between the first satellite and the second satellite.

In yet another possible implementation, the terminal establishes a connection with the first cell and the second cell simultaneously;

the terminal is in the coverage of the first cell and the second cell, or the terminal is in the coverage of a first beam in the first cell and the coverage of a second beam in the second cell.

In another possible implementation, the determining, by the terminal, a second scheduling delay offset value for uplink transmission with the first cell in the coverage area of the first beam in the first cell or the first cell according to the second round trip delay and the first scheduling delay offset value indicated by the first cell, includes:

the terminal determines a third round-trip delay according to the maximum round-trip delay, the first round-trip delay and satellite azimuth information corresponding to the first satellite and the second satellite;

and the terminal determines the second scheduling delay deviant according to the third round-trip delay and the first scheduling delay deviant.

In yet another possible implementation, the method further comprises:

the terminal receives second configuration information of the first cell, wherein the second configuration information comprises a third scheduling delay deviant;

and if the second scheduling delay offset value is greater than a third scheduling delay offset value, the terminal takes the third scheduling delay offset value as an additional scheduling delay value when the terminal and the first cell perform uplink data transmission.

In another possible implementation, the acquiring, by the terminal, the first round-trip delay includes:

the terminal determines the first round-trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite; or

And the terminal receives third configuration information of the first cell, wherein the third configuration information comprises the first round-trip delay.

In yet another possible implementation, the coverage of the first cell is greater than the coverage of the second cell, and/or the first beam coverage in the first cell is greater than the second beam coverage in the second cell.

In a second aspect, a scheduling delay determining apparatus is provided, which may implement the scheduling delay determining method in the first aspect. The scheduling delay determining means may be a chip or a terminal, for example. The above-described method may be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation manner, the scheduling delay determining apparatus may include a transceiver unit and a processing unit; wherein:

the transceiver unit is configured to receive first configuration information of a second cell, where the first configuration information includes a maximum round trip delay;

the transceiver unit is further configured to obtain a first round-trip delay;

the processing unit is configured to determine, according to the maximum round-trip delay and the first round-trip delay, a second round-trip delay of electromagnetic wave transmission between the terminal and a first satellite corresponding to a first cell;

the processing unit is further configured to determine, according to the second round trip delay and a first scheduling delay offset value indicated by the first cell, a second scheduling delay offset value for the terminal to perform uplink transmission with the first cell within a coverage area of a first beam in the first cell or the first cell, where the second scheduling delay offset value is an additional scheduling delay value for the terminal to perform uplink data transmission with the first cell.

Optionally, the maximum round trip delay is a round trip delay of electromagnetic wave transmission between a position farthest away from a second satellite corresponding to the second cell within a coverage area of a second beam in the second cell or the second cell and a position of a second satellite corresponding to the second cell;

Optionally, the terminal establishes a connection with the first cell and the second cell simultaneously;

the terminal is located in the coverage of the first cell and the second cell, or the terminal is located in the coverage of a first beam in the first cell and in the coverage of a second beam in the second cell.

Optionally, the processing unit is further configured to determine a third round trip delay according to the maximum round trip delay, the first round trip delay, and satellite position information corresponding to the first satellite and the second satellite;

the processing unit is further configured to determine the second scheduling delay offset value according to the third round trip delay and the first scheduling delay offset value.

Optionally, the transceiver unit is further configured to receive second configuration information of the first cell, where the second configuration information includes a third scheduling delay offset value;

the processing unit is further configured to use the third scheduling delay offset value as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell if the second scheduling delay offset value is greater than the third scheduling delay offset value.

Optionally, the processing unit is configured to determine the first round trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite; or

The transceiver unit is configured to receive third configuration information of the first cell, where the third configuration information includes the first round trip delay.

Optionally, the coverage of the first cell is larger than the coverage of the second cell, and/or the coverage of the first beam in the first cell is larger than the coverage of the second beam in the second cell.

In yet another possible implementation manner, the scheduling delay determining apparatus in the first aspect includes a processor coupled to a memory; the processor is configured to support the apparatus to perform corresponding functions in the scheduling delay determination method. The memory is used for coupling with the processor, which holds the necessary programs (instructions) and/or data for the device. Optionally, the scheduling delay determining apparatus may further include a communication interface for supporting communication between the apparatus and other network elements. Optionally, the memory may be located inside the scheduling delay determining apparatus, or may be located outside the scheduling delay determining apparatus.

In yet another possible implementation manner, the scheduling delay determining apparatus in the first aspect includes a processor and a transceiver, where the processor is coupled to the transceiver, and is configured to execute a computer program or instructions to control the transceiver to receive and transmit information; when the processor executes the computer program or instructions, the processor is also configured to implement the above method by logic circuits or executing code instructions. The transceiver may be a transceiver, a transceiver circuit or an input/output interface, and is configured to receive a signal from a scheduling delay determining apparatus other than the scheduling delay determining apparatus and transmit the signal to the processor or transmit the signal from the processor to the scheduling delay determining apparatus other than the scheduling delay determining apparatus. And when the scheduling time delay determining device is a chip, the transceiver is a transceiver circuit or an input/output interface.

When the scheduling delay determining apparatus in the first aspect is a chip, the sending unit may be an output unit, such as an output circuit or a communication interface; the receiving unit may be an input unit, such as an input circuit or a communication interface. When the scheduling delay determining device is a terminal, the sending unit may be a transmitter or a transmitter; the receiving unit may be a receiver or a receiver.

In a third aspect, a computer-readable storage medium is provided, in which a computer program or instructions are stored, which, when executed, implement the method of the above aspects.

In a fourth aspect, there is provided a computer program product comprising instructions which, when run on a scheduling latency determination apparatus, cause the scheduling latency determination apparatus to perform the method of the above aspects.

By adopting the scheduling delay determination scheme provided by the application, the following beneficial effects are achieved:

the terminal establishes connection with the first cell and the second cell simultaneously, and can determine a second round-trip delay between the terminal and a first satellite corresponding to the first cell according to the maximum round-trip delay configured by the second cell and a first round-trip delay acquired by the terminal, and can accurately determine an additional scheduling delay value when the terminal and the first cell perform uplink data transmission according to the second round-trip delay and a first scheduling delay deviant indicated by the first cell, so that the scheduling delay of data transmission is effectively reduced.

Drawings

FIG. 1 is a schematic diagram of an uplink and downlink timing relationship;

fig. 2 is a schematic diagram of PDCCH scheduling PUSCH;

FIG. 3 is a schematic diagram of a communication system to which the present application is applicable;

fig. 4 is a schematic flowchart of a scheduling delay determining method according to an embodiment of the present application;

fig. 5 is a schematic flowchart of another scheduling delay determining method according to an embodiment of the present application;

fig. 6 is a schematic flowchart of another scheduling delay determining method according to an embodiment of the present application;

FIG. 7 is a schematic diagram of an angle between a connection between the position of the first satellite and the position of the second satellite and the coverage area of the second cell or the bearing of the second beam in the second cell relative to the position of the satellite corresponding to the second cell;

fig. 8 is a schematic structural diagram of a scheduling delay determining apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of another scheduling delay determining apparatus according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

As shown in the schematic diagram of the uplink and downlink timing relationship in fig. 1, in an NTN scenario, when the UE sends uplink data, the UE shall send the uplink data in advance based on an obtained TA (timing advance) value, and for this reason, the uplink and downlink timing in the existing protocol needs to be enhanced, that is, an additional time interval (K _ offset) is added on the basis of the existing protocol. For example, as shown in fig. 2, which is a schematic diagram of a Physical Downlink Control Channel (PDCCH) scheduling physical downlink shared channel (PUSCH), in a process of scheduling a PUSCH in a conventional PDCCH, downlink Control Information (DCI) in the PDCCH indicates a scheduling delay value (protocol is referred to as K2) of a UE, and the UE transmits the PUSCH according to the indicated K2 value. However, there is a large propagation delay in NTN, and if the UE needs to transmit ahead according to TA, it means that there must be a large enough time interval between PDCCH reception and PUSCH transmission (at least not smaller than the size of TA, which the size of UE compensating TA may be the round-trip propagation delay between satellite and UE). Therefore, in NTN, the scheduling delay of PDCCH scheduling PUSCH is: k2+ K _ offset, which ensures that there must be a large enough time interval between the PDCCH reception time and the PUSCH transmission time for the UE to transmit in advance.

At present, the scenario that requires timing relationship enhancement (adding a K _ offset based on the existing timing) in the NTN scenario mainly includes:

(1) DCI schedules a transmission timing scenario of a PUSCH;

(2) A Random Access Response (RAR) authorizes scheduling of a transmission timing scenario of a PUSCH;

(3) Transmitting a transmission timing scenario of a hybrid automatic repeat request-acknowledgement response (HARQ-ACK) on a Physical Uplink Control Channel (PUCCH);

(4) A media access control-control element (MAC-CE) indicates a scenario of downlink configuration of the UE;

(5) Channel State Information (CSI) refers to a resource timing scenario;

(6) Aperiodic channel Sounding Reference Signal (SRS) transmission timing scenarios, and the like.

The timing relationship refers to the UE determining the uplink data transmission time/resource location, the MAC-CE effective time, and the CSI-RS resource location according to the existing formula. The uplink data includes: DCI-scheduled uplink data, RAR grant-scheduled uplink data (Msg 3), HARQ-ACK, aperiodic SRS (SRS transmission triggered by DCI), and the like. The larger the value of K _ offset means the larger the scheduling delay.

Regarding the value configuration of K _ offset, the current mechanism is:

during initial access, the network configures cell-level K _ offsets (i.e., one cell for one K _ offset), or beam-level K _ offsets (i.e., one beam for one K _ offset).

After initial access (after the UE enters the connected state), for a certain UE, the network may adjust the value of K _ offset through MAC-CE or Radio Resource Control (RRC) signaling. I.e., after initial access, the UE may use the network indicated UE level K _ offset. In this case, the UE needs to report the current location information or the TA value, so that the network can adjust the K _ offset corresponding to the UE according to the current location information or the TA value.

However, in a non-GNSS scenario (i.e., the terminal does not have GNSS capability and cannot obtain its own location information), the terminal cannot report the TA value/location information to update the additional scheduling delay offset value (K _ offset) when the terminal performs uplink data transmission with the cell. The network in the connected state cannot update the uplink scheduling delay offset value K _ offset according to the TA/location information reported by the terminal. The network can only use the K _ offset at the cell level or the uplink scheduling delay offset value (beam specific K _ offset) of a specific beam for data scheduling, which results in a large scheduling transmission delay.

In view of this, the present application provides a method and an apparatus for determining a scheduling delay, where a terminal establishes a connection with a first cell and a second cell at the same time, and the terminal may determine, according to a maximum round-trip delay configured in the second cell and a first round-trip delay obtained by the terminal, a second round-trip delay between the terminal and a first satellite corresponding to the first cell, and according to the second round-trip delay and a first scheduling delay offset value indicated by the first cell, an additional scheduling delay value when the terminal performs uplink data transmission with the first cell may be accurately determined, thereby effectively reducing the scheduling delay of data transmission.

Fig. 3 is a schematic diagram of a communication system to which the present application is applicable. The communication system may include at least one gateway (gateway) 100 (only 1 shown in the drawing), a satellite 200 (or UAS platform), and one or more terminals 300 connected to the gateway 100 through the satellite (or UAS platform). The terminal 300 accesses a data network (data network) through the satellite 200 and the gateway 100. Wherein, the gateway 100 is connected to the satellite 200 through a feedback link (feeder link); the satellite 200 and the terminal 300 are connected by a service link (service link).

The present application may be applied in the NTN scenario, as shown in fig. 3, one cell may be composed of one or more beams (beams). One ellipse in the figure may represent one beam.

The gateway 100 may be a device capable of communicating with the terminal 300. The gateway 100 may be any device having a wireless transceiving function. Including but not limited to: a base station NodeB, an evolved base station eNodeB, a base station in the fifth generation (5G) communication system, a base station or gateway in a future communication system, an access node in a WiFi system, a wireless relay node, a wireless backhaul node, and the like. The gateway 100 may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. The gateway 100 may also be a small station, a Transmission Reference Point (TRP), or the like. The embodiments of the present application do not limit the specific technology and the specific device form used by the gateway.

The terminal device 300 is a device with a wireless transceiving function, and can be deployed on land, including indoors or outdoors, hand-held, worn or vehicle-mounted; can also be deployed on the water surface, such as a ship and the like; and may also be deployed in the air, such as airplanes, balloons, satellites, and the like. The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. The embodiments of the present application do not limit the application scenarios. A terminal device may also sometimes be referred to as a User Equipment (UE), an access terminal device, a UE unit, a mobile station, a remote terminal device, a mobile device, a terminal (terminal), a wireless communication device, a UE agent, or a UE apparatus, etc.

It should be noted that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Fig. 4 is a schematic flowchart of a scheduling delay determining method according to an embodiment of the present application. The method is applied to a dual connectivity scenario, that is, the UE establishes connectivity with the first cell and the second cell simultaneously. The first cell and the second cell may correspond to the same gateway or different gateways. The method may comprise the steps of:

s401, the second cell sends first configuration information. Accordingly, the UE receives the first configuration information of the second cell.

Wherein the first configuration information includes a maximum Round Trip Time (RTT).

As described in the background, in a non-GNSS scenario (i.e., the UE does not have GNSS capability and cannot obtain its own location information), the UE cannot report the TA value/location information to update the additional scheduling delay offset value K _ offset when the UE and the cell perform uplink data transmission. The network in the connected state cannot update the additional scheduling delay offset value K _ offset for uplink data scheduling according to the TA/location information reported by the UE. However, if the UE uses the cell-level K _ offset or the beam specific K _ offset to perform uplink data transmission with the first cell, a large scheduling transmission delay may be caused.

In this embodiment, the UE establishes a connection with the first cell and the second cell simultaneously. Specifically, the UE is in the coverage of the first cell and the second cell, or the UE is in the coverage of a first beam in the first cell and in the coverage of a second beam in the second cell.

And the UE communicates with the gateway/base station corresponding to the first cell through a first satellite in the coverage area of the first cell, and communicates with the gateway/base station corresponding to the second cell through a second satellite in the coverage area of the second cell. The first satellite corresponding to the first cell and the second satellite corresponding to the second cell may be in the same satellite orbit or may be in different satellite orbits.

The UE may receive first configuration information for a second cell, the first configuration information including a maximum round trip delay. The maximum round-trip delay is the round-trip delay of electromagnetic wave transmission between a farthest position from a second satellite corresponding to the second cell and a second satellite position corresponding to the second cell in the second cell or a second beam coverage area in the second cell.

The coverage area of the first cell is larger than that of the second cell, and/or the coverage area of the first beam in the first cell is larger than that of the second beam in the second cell. Therefore, the UE can obtain a more accurate maximum round trip delay of the second cell transmission.

S402, the UE acquires a first round-trip delay.

The first round-trip delay is the round-trip delay of electromagnetic wave transmission between the first satellite and the second satellite.

The UE may obtain the first round-trip delay through its own calculation, or may obtain the first round-trip delay through receiving system information, RRC dedicated signaling, or MAC CE delivered by the first cell or the second cell.

And S403, determining, by the UE, a second round-trip delay of electromagnetic wave transmission between the UE and the first satellite corresponding to the first cell according to the maximum round-trip delay and the first round-trip delay.

After obtaining the maximum round-trip delay and the first round-trip delay, the UE may determine, according to the maximum round-trip delay and the first round-trip delay, a second round-trip delay of electromagnetic wave transmission between the UE and a first satellite corresponding to the first cell. The second round trip delay is the sum of the maximum round trip delay and the first round trip delay.

S404, the UE determines a second scheduling delay deviant of the UE performing uplink transmission with the first cell in the first cell or the coverage range of the first beam in the first cell according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, wherein the second scheduling delay deviant is an extra scheduling delay value of the UE performing uplink data transmission with the first cell.

The UE may further receive a first scheduling delay offset value indicated by the first cell after determining the second round-trip delay. The first scheduling delay offset value is configured by the first cell according to a common TA. The common TA refers to an RTT value between a reference point in the first cell and the first satellite corresponding to the first cell.

After determining the second round-trip delay and the first scheduling delay deviant, the UE determines a second scheduling delay deviant for uplink transmission with the first cell in the first cell or within the coverage range of the first beam in the first cell according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell. The second scheduling delay offset value is the sum of the second round trip delay and the first scheduling delay offset value. The second scheduling delay offset value may be used as an additional scheduling delay value when the UE performs uplink data transmission with the first cell.

The UE may perform uplink data transmission with the first cell based on the additional scheduling delay value.

Because the UE determines the extra scheduling delay value based on the maximum round-trip delay sent by the second cell with a smaller coverage, the accuracy of the extra scheduling delay value can be improved, and thus the scheduling delay of data transmission can be effectively reduced.

According to the scheduling delay determining method provided by the embodiment of the application, the terminal establishes connection with the first cell and the second cell at the same time, and the terminal can determine the second round-trip delay between the terminal and the first satellite corresponding to the first cell according to the maximum round-trip delay configured in the second cell and the first round-trip delay acquired by the terminal, and can accurately determine the additional scheduling delay value when the terminal and the first cell perform uplink data transmission according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, thereby effectively reducing the scheduling delay of data transmission.

Fig. 5 is a schematic flowchart of a scheduling delay determining method according to an embodiment of the present application. The method is applied to a dual-connection scenario, namely that the UE establishes connection with a first cell and a second cell simultaneously. The first cell and the second cell may correspond to the same gateway or different gateways. The method may comprise the steps of:

s501, the first cell sends second configuration information. Accordingly, the UE receives second configuration information of the first cell.

Wherein the second configuration information includes a third scheduling delay offset value.

In this embodiment, the UE is in the coverage of the first cell and the second cell, or the UE is in the coverage of the first beam in the first cell and the coverage of the second beam in the second cell. The coverage of the first cell is greater than the coverage of the second cell, and/or the coverage of the first beam in the first cell is greater than the coverage of the second beam in the second cell.

The first cell communicates with the gateway via a first satellite and the second cell communicates with the gateway via a second satellite. The first satellite corresponding to the first cell and the second satellite corresponding to the second cell may be in the same satellite orbit or in different satellite orbits.

The UE receives second configuration information of the first cell, where the second configuration information includes a third scheduling delay offset value. The third scheduling delay offset value is K _ offset or beam specific K _ offset of the cell level. Illustratively, the UE may receive System Information (SI) or RRC signaling of the first cell, where the system information or RRC signaling includes the second configuration information.

S502, the second cell sends the first configuration information. Accordingly, the UE receives the first configuration information of the second cell.

Wherein the first configuration information comprises a maximum round trip delay.

The maximum round-trip delay is the round-trip delay of electromagnetic wave transmission between a farthest position from a second satellite corresponding to the second cell and a second satellite position corresponding to the second cell within the second cell or a second beam coverage area in the second cell.

The UE receives first configuration information of a second cell, the first configuration information including a maximum round trip delay. Illustratively, the UE may receive system information or RRC signaling of the second cell, which includes the first configuration information.

S503, the UE determines a first round trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite.

In the NTN, the satellite operates on a specific orbit, and its motion is regular, so that the propagation delay variation caused by the satellite motion is regular and predictable. The UE may determine the first round trip delay based on satellite ephemeris information of the first satellite and satellite ephemeris information of the second satellite. The first round-trip delay is the round-trip delay of electromagnetic wave transmission between the first satellite and the second satellite.

Alternatively, the gateway corresponding to the first cell may have obtained the first round trip delay in advance, and therefore, the UE may receive third configuration information of the first cell, where the third configuration information includes the first round trip delay. Illustratively, the UE may receive system information or RRC signaling of the first cell, which includes the third configuration information.

The UE may also receive indication information of the first cell, the indication information indicating a function of the first round trip delay over time.

Alternatively, the gateway corresponding to the second cell may have obtained the first round trip delay in advance, and therefore, the UE may receive fourth configuration information of the second cell, where the fourth configuration information includes the first round trip delay. Illustratively, the UE may receive system information or RRC signaling of the second cell, which includes the fourth configuration information.

And S504, the UE determines a second round-trip delay of electromagnetic wave transmission between the UE and a first satellite corresponding to the first cell according to the maximum round-trip delay and the first round-trip delay.

The step S403 of the embodiment shown in fig. 4 can be referred to for specific implementation of the step.

And S505, the UE determines a second scheduling delay deviant for uplink transmission between the UE and the first cell in the first cell or within the coverage area of the first beam in the first cell according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell.

The specific implementation of this step can refer to step S404 in the embodiment shown in fig. 4.

S506, the UE determines whether the second scheduling delay offset value is greater than the third scheduling delay offset value. If yes, go to step S507; otherwise, go to step S505.

And S507, the UE takes the third scheduling delay deviant as an additional scheduling delay value when the terminal and the first cell perform uplink data transmission.

As described above, in step S501, the first cell configures a third scheduling delay offset value, and determines a second scheduling delay offset value according to steps S502 to S505, however, the second scheduling delay offset value may be larger than the third scheduling delay offset value at the cell level. In this case, the third scheduling delay offset value may be used as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell. And if the second scheduling delay offset value is possibly smaller than a third scheduling delay offset value of the cell level, still taking the second scheduling delay offset value as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell. Or, the UE may determine to use the third scheduling delay offset value or the second scheduling delay offset value as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell according to the indication of the first cell.

Alternatively, the execution order of step S501 and steps S502 to S505 is not limited, and step S501 may be executed before steps S502 to S505; step S501 may be executed after steps S502 to S505.

According to the scheduling delay determining method provided by the embodiment of the application, the terminal establishes connection with the first cell and the second cell at the same time, and the terminal can determine the second round-trip delay between the terminal and the first satellite corresponding to the first cell according to the maximum round-trip delay configured by the second cell and the first round-trip delay acquired by the terminal, and can accurately determine the additional scheduling delay value when the terminal and the first cell perform uplink data transmission according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, thereby effectively reducing the scheduling delay of data transmission; and the terminal compares the determined second scheduling delay deviant with a third scheduling delay deviant of a cell level configured by the cell, and selects a smaller scheduling delay deviant as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell, thereby further accurately reducing the scheduling delay of data transmission.

Fig. 6 is a schematic flowchart of a scheduling delay determining method according to an embodiment of the present application. The method is applied to a dual-connection scenario, namely that the UE establishes connection with a first cell and a second cell simultaneously. The first cell and the second cell may correspond to the same gateway or different gateways. The method may comprise the steps of:

s601, the first cell sends second configuration information. Accordingly, the UE receives second configuration information of the first cell.

The step S501 in the embodiment shown in fig. 5 can be referred to for specific implementation of this step.

S602, the second cell sends the first configuration information. Accordingly, the UE receives first configuration information of the second cell, the first configuration information including a maximum round trip delay.

The maximum round-trip delay is the round-trip delay of the electromagnetic wave transmission between the farthest position from the second satellite corresponding to the second cell and the position of the second satellite corresponding to the second cell in the second cell or the coverage area of the second beam in the second cell.

The step can be implemented by referring to step S401 in the embodiment shown in fig. 4 or step S502 in the embodiment shown in fig. 5.

S603, the UE determines a first round-trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite.

Alternatively, the UE receives third configuration information of the first cell, the third configuration information including the first round trip delay.

The step S503 of the embodiment shown in fig. 5 can be referred to for specific implementation of this step.

S604, the UE determines a second round-trip delay between the UE and a first satellite corresponding to the first cell according to the maximum round-trip delay and the first round-trip delay.

The specific implementation of this step can refer to step S403 in the embodiment shown in fig. 4 or step S504 in the embodiment shown in fig. 5.

And S605, the UE determines a third round-trip delay according to the maximum round-trip delay, the first round-trip delay value and the satellite azimuth information corresponding to the first satellite and the second satellite.

And the UE determines the positions of the satellite corresponding to the first cell and the satellite corresponding to the second cell according to the ephemeris information of the satellite corresponding to the first cell and the ephemeris information of the satellite corresponding to the second cell. The UE determines, according to the position information of the satellite corresponding to the first cell, the position of the satellite corresponding to the second cell, and the azimuth angle of the second beam in the second cell with respect to the position of the satellite corresponding to the second cell in the coverage area of the second cell or the second cell, an included angle (an included angle a shown in fig. 7) between a connection line between the position of the satellite corresponding to the first cell and the position of the satellite corresponding to the second cell and the coverage area of the second cell or the azimuth angle of the second beam in the second cell with respect to the position of the satellite corresponding to the second cell. And finally, the UE determines a third round-trip delay according to the included angle, the first round-trip delay value and the maximum differential delay value corresponding to the second cell or a second beam coverage area in the second cell.

Therefore, the third round trip delay can be further accurately determined by combining the satellite position information corresponding to the first satellite and the second satellite.

And S606, determining a second scheduling delay offset value according to the third round-trip delay and the first scheduling delay offset value.

And the UE determines a second scheduling delay deviation value according to the third round-trip delay and the first scheduling delay deviation value, and the precision of the second scheduling delay deviation value is further improved.

S607, determining whether the second scheduling delay offset value is greater than the third scheduling delay offset value. If yes, go to step S608; otherwise, go to step S606.

The step S506 of the embodiment shown in fig. 5 can be referred to for specific implementation of this step.

And S608, the UE takes the third scheduling delay offset value as an additional scheduling delay value when the terminal and the first cell perform uplink data transmission.

The step S507 of the embodiment shown in fig. 5 may be referred to for specific implementation of this step.

According to the scheduling delay determining method provided by the embodiment of the application, the terminal is connected with the first cell and the second cell at the same time, and the terminal can determine the second round-trip delay between the terminal and the first satellite corresponding to the first cell according to the maximum round-trip delay configured by the second cell and the first round-trip delay acquired by the terminal, and can determine the additional scheduling delay value when the terminal and the first cell perform uplink data transmission according to the second round-trip delay and the first scheduling delay deviant indicated by the first cell, so that the scheduling delay of data transmission is effectively reduced; the terminal compares the determined second scheduling delay offset value with a third scheduling delay offset value of a cell level configured by the cell, and selects a smaller scheduling delay offset value as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell, so that the scheduling delay of data transmission is further accurately reduced; and according to the second round-trip delay and the satellite azimuth information corresponding to the first satellite and the second satellite, the accuracy of the second scheduling delay deviation value is further improved.

It is understood that, in order to implement the functions in the above embodiments, the terminal includes a corresponding hardware structure and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software driven hardware depends on the particular application scenario and design constraints imposed on the solution.

Fig. 8 and fig. 9 are schematic structural diagrams of a possible scheduling delay determining apparatus according to an embodiment of the present application. The scheduling delay determining apparatuses may be configured to implement the functions of the terminal in the foregoing method embodiment, so that the beneficial effects of the foregoing method embodiment may also be implemented. In the embodiment of the present application, the scheduling delay determining apparatus may be a terminal, and may also be a module (e.g., a chip) applied to the terminal.

As shown in fig. 8, the scheduling delay determining apparatus 800 includes a processing unit 810 and a transceiving unit 820. The scheduling delay determining apparatus 800 is used to implement the functions of the terminal in the method embodiments shown in fig. 4-6.

the transceiving unit 820 is further configured to obtain a first round-trip delay;

the processing unit 810 is configured to determine, according to the maximum round-trip delay and the first round-trip delay, a second round-trip delay of electromagnetic wave transmission between the terminal and a first satellite corresponding to a first cell;

the processing unit 810 is further configured to determine, according to the second round trip delay and the first scheduling delay offset value indicated by the first cell, a second scheduling delay offset value for the terminal to perform uplink transmission with the first cell in the first cell or a coverage area of a first beam in the first cell, where the second scheduling delay offset value is an additional scheduling delay value for the terminal to perform uplink data transmission with the first cell.

Optionally, the processing unit 810 is further configured to determine a third round trip delay according to the maximum round trip delay, the first round trip delay, and satellite position information corresponding to the first satellite and the second satellite;

the processing unit 810 is further configured to determine the second scheduling delay offset value according to the third round trip delay and the first scheduling delay offset value.

Optionally, the transceiver 820 is further configured to receive second configuration information of the first cell, where the second configuration information includes a third scheduling delay offset value;

the processing unit 810 is further configured to use the third scheduling delay offset value as an additional scheduling delay value when the terminal performs uplink data transmission with the first cell if the second scheduling delay offset value is greater than the third scheduling delay offset value.

Optionally, the processing unit 810 is configured to determine the first round trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite; or

The transceiver component 820 is configured to receive third configuration information of the first cell, where the third configuration information includes the first round trip delay.

More detailed descriptions about the processing unit 810 and the transceiver 820 can be directly obtained by referring to the related descriptions in the method embodiments shown in fig. 4-6, which are not repeated herein.

As shown in fig. 9, the scheduling delay determining apparatus 900 includes a processor 910 and an interface circuit 920. The processor 910 and the interface circuit 920 are coupled to each other. It is understood that the interface circuit 920 may be a transceiver or an input-output interface. Optionally, the scheduling delay determining apparatus 900 may further include a memory 930, configured to store instructions executed by the processor 910 or input data required by the processor 910 to execute the instructions or data generated by the processor 910 after executing the instructions.

When the scheduling delay determining apparatus 900 is used to implement the methods shown in fig. 4-6, the processor 910 is configured to implement the functions of the processing unit 810, and the interface circuit 920 is configured to implement the functions of the transceiving unit 820.

When the scheduling delay determining device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiment. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent to the terminal by the access network equipment; alternatively, the terminal chip sends information to other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent by the terminal to the access network device.

When the scheduling delay determining device is a chip applied to an access network device, the access network device chip implements the functions of the access network device in the above method embodiments. The access network equipment chip receives information from other modules (such as a radio frequency module or an antenna) in the access network equipment, and the information is sent to the access network equipment by a terminal; alternatively, the access network device chip sends information to other modules (such as a radio frequency module or an antenna) in the access network device, where the information is sent by the access network device to the terminal.

It is understood that the Processor in the embodiments of the present Application may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The general purpose processor may be a microprocessor, but may be any conventional processor.

The method steps in the embodiments of the present application may be implemented by hardware, or may be implemented by software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in an access network device or terminal. Of course, the processor and the storage medium may reside as discrete components in an access network device or terminal.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, an access network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; optical media such as digital video disks; but also semiconductor media such as solid state disks.

In the embodiments of the present application, unless otherwise specified or conflicting with respect to logic, the terms and/or descriptions in different embodiments have consistency and may be mutually cited, and technical features in different embodiments may be combined to form a new embodiment according to their inherent logic relationship.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. In the text description of the present application, the character "/" generally indicates that the preceding and following associated objects are in an "or" relationship; in the formula of the present application, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. The sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic.

Claims

1. A method for determining scheduling delay, the method comprising:

the terminal acquires a first round-trip delay;

2. The method of claim 1, wherein the maximum round trip delay is a round trip delay of electromagnetic wave transmission between a location farthest from a second satellite corresponding to the second cell and a location of a second satellite corresponding to the second cell within a coverage area of a second beam in the second cell or the second cell;

3. The method of claim 2, wherein the terminal establishes connections with the first cell and the second cell simultaneously;

4. The method according to claim 2 or 3, wherein the determining, by the terminal, a second scheduling delay offset value for uplink transmission with the first cell within a coverage area of the first beam in the first cell or the first cell according to the second round trip delay and the first scheduling delay offset value indicated by the first cell, comprises:

5. The method according to any one of claims 1-3, further comprising:

6. The method according to claim 1 or 2, wherein the terminal obtains the first round trip delay, comprising:

7. A method according to claim 2 or 3, characterised in that the coverage of the first cell is larger than the coverage of the second cell and/or that the first beam coverage in the first cell is larger than the second beam coverage in the second cell.

8. An apparatus for determining scheduling delay, the apparatus comprising: a transceiving unit and a processing unit; wherein:

the transceiver unit is further configured to obtain a first round-trip delay;

the processing unit is further configured to determine a second scheduling delay offset value for the terminal to perform uplink transmission with the first cell in the first cell or within a coverage area of a first beam in the first cell according to the second round-trip delay and the first scheduling delay offset value indicated by the first cell, where the second scheduling delay offset value is an additional scheduling delay value for the terminal to perform uplink data transmission with the first cell.

9. The apparatus of claim 8, wherein the maximum round trip delay is a round trip delay of electromagnetic wave transmission between a location farthest from a second satellite corresponding to the second cell within a coverage area of a second beam in the second cell or the second cell and a location of a second satellite corresponding to the second cell;

10. The apparatus of claim 9, wherein the terminal establishes connections with the first cell and the second cell simultaneously;

11. The apparatus of claim 9 or 10, wherein:

the processing unit is further configured to determine a third round-trip delay according to the maximum round-trip delay, the first round-trip delay, and satellite position information corresponding to the first satellite and the second satellite;

12. The apparatus according to any one of claims 8-10, wherein:

the transceiver unit is further configured to receive second configuration information of the first cell, where the second configuration information includes a third scheduling delay offset value;

13. The apparatus of claim 8 or 9, wherein:

the processing unit is configured to determine the first round trip delay according to the satellite ephemeris information of the first satellite and the satellite ephemeris information of the second satellite; or

14. The apparatus according to claim 9 or 10, wherein the coverage of the first cell is larger than the coverage of the second cell, and/or wherein the first beam coverage in the first cell is larger than the second beam coverage in the second cell.

15. A scheduling delay determining apparatus comprising a processor and an interface circuit for receiving signals from other apparatus than the apparatus and transmitting the signals to or from the processor to other scheduling delay determining apparatus than the apparatus, the processor being arranged to implement the method of any of claims 1 to 7 by logic circuits or executing code instructions.

16. A chip for application in a terminal, characterized in that the chip is adapted to perform the method according to any of claims 1-7.

17. A chip module applied to a terminal, comprising a transceiver component and a chip, wherein the chip is used for executing the method according to any one of claims 1 to 7.

18. A computer-readable storage medium, in which a computer program or instructions is stored which, when executed by a scheduling latency determination apparatus, implements the method of any one of claims 1 to 7.