CN112584433A

CN112584433A - Data sending and receiving method, equipment and medium

Info

Publication number: CN112584433A
Application number: CN201910940811.2A
Authority: CN
Inventors: 倪吉庆; 王爱玲; 周伟; 柴丽; 孙军帅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-03-30
Anticipated expiration: 2039-09-30
Also published as: WO2021063241A1; CN112584433B

Abstract

The invention discloses a method, a device and a medium for sending and receiving data, which comprise the following steps: a sending end sends data in a time window in a period; if the transmission fails, the transmitting end retransmits the data in a time window with the same index in the next period; wherein the period at least comprises one or more time windows. A receiving end receives data in a time window in a period; if the receiving fails, the receiving end receives the data again in the time window with the same index in the next period; wherein the period at least comprises one or more time windows. By adopting the invention, the retransmission data can be indicated under the condition of not increasing the downlink control information bit of the numerical field of the hybrid automatic repeat request process in the downlink control information, the control information overhead is reduced, and the problem of data retransmission under large propagation delay is effectively solved.

Description

Data sending and receiving method, equipment and medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmitting method, a data receiving method, a device, and a medium.

Background

In an NTN (Non terrestrial network), a base station is located at a satellite, and a terminal is located on the ground, so that the distance between the base station and the terminal is long due to the high altitude of the satellite. Specifically, an LEO (Low Earth Orbit satellite) system can reach 1500km, an MEO (Middle Earth Orbit satellite) system has 10000km, and a GEO (Geosynchronous Earth Orbit satellite) system has 35786 km. So that the RTT (Round Trip Time) in different scenarios varies greatly compared to the opposite network.

The defects of the prior art are as follows: in the scenario of NTN or other long propagation delay, when data packet retransmission is performed, DCI (Downlink Control Information) overhead is increased.

Disclosure of Invention

The invention provides a data sending and receiving method, equipment and a medium, which are used for not increasing DCI (downlink control information) overhead when data packet retransmission is carried out.

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

a sending end sends data in a time window in a period;

if the transmission fails, the transmitting end retransmits the data in a time window with the same index in the next period; wherein the period at least comprises one or more time windows.

In an implementation, the period and the time window are configured through higher layer signaling.

In implementation, configuring the period and the time window through higher layer signaling includes:

the network side configures cycle parameters, wherein the cycle parameters comprise: a period duration and/or a starting value or offset value of the period;

configuring time window parameters on a network side, wherein the time window parameters comprise: the time window duration and/or the number of time windows in a period;

the one period contains a positive integer number of time windows.

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

a receiving end receives data in a time window in a period;

if the receiving fails, the receiving end receives the data again in the time window with the same index in the next period; wherein the period at least comprises one or more time windows.

the one period contains a positive integer number of time windows.

The embodiment of the invention provides a method for determining an HARQ process ID, which comprises the following steps:

the HARQ process ID is determined by a function with the time window index as a parameter.

In the implementation, when the value of the HARQ process ID is determined by a function using the time window index as a parameter, the value is determined by the following function:

HARQ process ID ═ window index ═ C + HARQ process number; wherein the content of the first and second substances,

the window index is a time window index representing a time window in which the data is sent;

c is a positive integer constant or configured parameter, representing the number of HARQ processes supported within a time window or the maximum number of HARQ processes;

the HARQ process number is a numerical value indicated by the HARQ process number field in the DCI.

In an implementation, the time window is configured through higher layer signaling.

In implementation, configuring the time window through higher layer signaling includes:

the one period contains a positive integer number of time windows.

a sending end sends data;

and if the transmission fails, the transmitting end retransmits the data within a preset time period after the failure indication.

In an implementation, the failure indication is a NACK indication sent on PUCCH by the receiving end.

In implementation, the duration of the time period and/or the time difference between the preset time period and the failure indication is sent to the receiving end through higher layer information.

In the implementation, the time difference is a time slot difference between the initial time slot of the monitoring window of the receiving end and the time slot of the failure indication; or the time slot difference between the initial time slot of the monitoring window of the receiving end and the last time slot of a plurality of continuous uplink time slots in which the NACK is sent.

a receiving end receives data;

if the receiving fails, the receiving end receives the data again within a preset time period after the failure indication.

In implementation, the duration of the preset time period and/or the time difference between the preset time period and the failure indication is sent to the receiving end through high-level information.

In the implementation, the time difference is a time slot difference between the initial time slot of the monitoring window of the receiving end and the time slot of the failure indication; or the time slot difference between the initial time slot of the monitoring window of the receiving end and the last time slot of a plurality of continuous uplink time slots in which the time slot of the failure indication is positioned.

An embodiment of the present invention provides a communication device, including:

the processor is used for reading the program in the memory and processing data according to the requirement of the transceiver;

a transceiver for receiving and transmitting data under the control of the processor, performing the following processes:

transmitting data in a time window within a period;

if the transmission fails, retransmitting the data in a time window with the same index in the next period; wherein the period at least comprises one or more time windows.

configuring cycle parameters, wherein the cycle parameters comprise: a period duration and/or a starting value or offset value of the period;

configuring time window parameters, wherein the time window parameters comprise: the time window duration and/or the number of time windows in a period;

the one period contains a positive integer number of time windows.

a first sending module, configured to send data in a time window within one period;

a first retransmission module for retransmitting data within a time window having the same index in a next cycle if transmission fails; wherein the period at least comprises one or more time windows.

In an implementation, the method further comprises the following steps:

a configuration module, configured to configure the period and the time window through a high-level signaling.

In an implementation, the configuring module is further configured to, when configuring the period and the time window through higher layer signaling, include:

the one period contains a positive integer number of time windows.

receiving data in a time window within a period;

if the receiving fails, the data is received again in a time window with the same index in the next period; wherein the period at least comprises one or more time windows.

the one period contains a positive integer number of time windows.

a first receiving module, configured to receive data in a time window within one period;

a first re-receiving module, configured to re-receive data in a time window with the same index in a next period if reception fails; wherein the period at least comprises one or more time windows.

In an implementation, the method further comprises the following steps:

and the receiving configuration module is used for receiving the period and the time window configuration through a high-level signaling.

In an implementation, the receiving configuration module is further configured to, when receiving the cycle and time window configuration through higher layer signaling, include:

receiving a cycle parameter configuration, wherein the cycle parameter comprises: a period duration and/or a starting value or offset value of the period;

receiving a time window parameter configuration, the time window parameter comprising: the time window duration and/or the number of time windows in a period;

the one period contains a positive integer number of time windows.

a processor for reading the program in the memory, performing the following processes:

determining the HARQ process ID through a function taking the time window index as a parameter;

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

the one period contains a positive integer number of time windows.

a determining module, configured to determine the HARQ process ID through a function with the time window index as a parameter.

In an implementation, the determining module is further configured to determine, when determining the value of the HARQ process ID by a function with the time window index as a parameter, by:

In an implementation, the method further comprises the following steps:

In an implementation, the configuring module is further configured to, when configuring the time window through higher layer signaling, include:

the one period contains a positive integer number of time windows.

sending data;

if the transmission fails, the data is retransmitted within a preset period of time after the failure indication.

the second sending module is used for sending data;

and the second retransmission module is used for retransmitting the data within a preset time period after the failure indication if the transmission fails.

In an implementation, the second sending module is further configured to send the failure indication as a NACK indication on a PUCCH.

In implementation, the second retransmission module is further configured to send the time duration of the time period and/or the time difference between the preset time period and the failure indication to the receiving end through high-level information.

receiving data;

if the reception fails, the data is re-received within a preset period of time after the failure indication.

a second receiving module, configured to receive data in a time window within one period;

and the second receiving module is used for receiving the data again within a preset time period after the failure indication if the receiving fails.

In an implementation, the second receiving module is further configured to send a NACK indication on the PUCCH when sending the failure indication.

In implementation, the second re-receiving module is further configured to send the duration of the preset time period and/or the time difference between the preset time period and the failure indication to the receiving end through high-level information.

The embodiment of the invention provides communication equipment, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes one of the method for sending the data, the method for receiving the data and the method for determining the HARQ process ID or the combination of the method for sending the data, the method for receiving the data and the method for determining the HARQ process ID when executing the computer program.

The embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing one of the above-mentioned data transmission method, data reception method, HARQ process ID determination method, or a combination thereof.

The invention has the following beneficial effects:

in the technical solution provided in the embodiment of the present invention, after the transmission period including the time window is set, since the association between the retransmission data and the transmission data is established through the time window, the retransmission data can be indicated without increasing DCI bits of the HARQ process number field in DCI.

In the technical solution provided in the embodiment of the present invention, after the transmission period including the time window is set, since the HARQ process ID can be determined by the function of the time window indication parameter for the retransmission data, the retransmission data can be indicated without increasing DCI bits of the HARQ process number field in DCI.

In the technical solution provided in the embodiment of the present invention, since the retransmission data is retransmitted within the preset time period, the receiving end can determine the reception of the data, and thus the retransmission data can be indicated without increasing DCI bits of the HARQ process number field in DCI.

Since retransmission data can be indicated without increasing DCI bits of the HARQ process number field in DCI, control information overhead is reduced.

Furthermore, the problem of data retransmission under large propagation delay in the NTN scene is effectively solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of data transmission in an NTN scenario according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an implementation flow of a method for sending data at a sending end in an embodiment of the present invention;

fig. 3 is a schematic flow chart of an implementation of a method for receiving data at a receiving end according to an embodiment of the present invention;

FIG. 4 is a first diagram illustrating data retransmission according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first communication device in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a third communication device in the embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating an implementation of a method for determining an HARQ process ID according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a fifth communication device in the embodiment of the present invention;

fig. 9 is a schematic flow chart of a second implementation flow of a data sending method at a sending end in the embodiment of the present invention;

fig. 10 is a schematic flow chart of a second implementation of the method for receiving data at a receiving end in the embodiment of the present invention;

FIG. 11 is a second diagram illustrating data retransmission according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a seventh communication device in the embodiment of the present invention;

fig. 13 is a schematic structural diagram of a ninth communication device in the embodiment of the present invention.

Detailed Description

The inventor notices in the process of invention that:

systems such as LTE (Long Term Evolution)/NR (New Radio interface) can support retransmission of a data packet at a MAC (Media Access Control) layer. Currently, the MAC entity in NR includes a HARQ (Hybrid Automatic Repeat Request) entity.

The HARQ entity maintains multiple parallel HARQ processes (HARQ processes). Each HARQ process is associated with a HARQ process identification (HARQ process ID).

In NR, an NDI (New Data Indicator) field in DCI indicates whether a scheduled packet is a New packet or a retransmission packet; if the data packet is retransmitted, the HARQ process number field is used for indicating which HARQ process corresponds to the data packet retransmission; in addition, an RV (Redundancy version) field is used to cooperate with a Redundancy version indicating retransmission data.

The number of the maximum HARQ processes supported by the user is realized through configuration or presetting. Wherein, the HARQ process number field occupies 4 bits, and can indicate the data packet corresponding to 16 HARQ processes at most.

And the receiving end determines the corresponding HARQ process based on the DCI information and judges whether the data packet is retransmitted or not. The receiving end monitors the retransmission data and combines the soft information of the retransmission data of one or more times before the same HARQ process, thereby improving the reliability of data transmission.

In the present application, in the description, the number of HARQ processes refers to the number of supportable parallel HARQ processes; HARQ process number refers to the HARQ process number field in the DCI; the HARQ process ID characterizes the HARQ process identifier, i.e. HARQ process identification/indication/index etc.

In the NTN, the base station is located at a satellite, and the terminal is located on the ground, so that the distance between the base station and the terminal is long due to the high altitude of the satellite. Specifically, LEO can reach 1500km, MEO has 10000km, GEO has 35786km, which causes the RTT in different scenarios to vary greatly compared with the RTT in the opposite network, where the RTT is shown in table 1 (considering the relay forwarding scenario).

Table 1: RTT under different communication scenarios

Scene	Max.RTT
		LEO	50ms
MEO	180ms
		GEO/HEO	600ms

In the table, HEO refers to a high Elliptical Orbit (high ellipse Orbit).

Fig. 1 is a schematic diagram of data transmission in an NTN scenario, as shown in the figure, in the NTN scenario, because the RTT is longer, the number of data packets carried in one period increases greatly, that is, the number of HARQ processes that can be carried increases correspondingly.

For example, when the RTT is 600ms, when an FDD (Frequency Division Duplex) system or all timeslot structures are downlink timeslots, the maximum number of HARQ processes is 600; when the ratio of uplink time slot to downlink time slot is 3: 2(DL (downlink): 3, UL (uplink): 2), the number of downlink HARQ processes reaches 360. The system needs to support more HARQ processes to ensure that each data packet can be retransmitted.

One solution to increase the number of supported HARQ processes is to directly increase the number of HARQ process number field bits. For example, the number of bits from the HARQ process number field is extended from 4 bits to 9 bits, so that after the extension, the number of HARQ processes can be extended from 16 to 512, and thus the configuration of uplink and downlink timeslot configuration to 3: 2 (DL: 3, UL: 2) in the GEO scenario can be supported.

However, this scheme has a disadvantage in that DCI overhead is increased by directly increasing the number of bits of the HARQ process number field.

In addition, considering that the HARQ process number field in the current NR system DCI format 1-0/1-1 and DCI format0-0/0-1 has a fixed number of bits, if the number of bits of the HARQ process number field varies, the determination of the DCI size will be affected.

Based on this, in the embodiment of the present invention, it is to be solved how to effectively implement retransmission of a data packet without increasing the number of bits of the HARQ process number field in DCI in a scenario where NTN or other propagation delay is long.

The following describes embodiments of the present invention with reference to the drawings.

In the description process, the implementation of the transmitting end and the receiving end will be described separately, and then an embodiment of the implementation of the transmitting end and the receiving end in cooperation with each other will be given to better understand the implementation of the scheme given in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together or separately, and actually, when the transmitting end and the receiving end are implemented separately, the problems on their own sides are solved separately, and when the two are used in combination, a better technical effect is obtained.

In the specific description process, a base station is used as a transmitting end, and a UE is used as a receiving end, because the scheme is suitable for data retransmission in an NTN scenario, the data retransmission between the base station and the UE in the NTN scenario is mainly used as an example for description; however, theoretically, the method and the device can be used for data retransmission between other devices, and a better result can be obtained by using the technical solution provided by the embodiment of the present invention only when the RTT between the two devices is larger, so that the data retransmission between the base station and the UE is only used for teaching a person skilled in the art how to implement the present invention specifically, but not only can be applied to the situation, and the implementation process can be combined with practical needs to determine a corresponding application environment.

Similarly, in the specific description process, the implementation of the UE and the base station will be described separately, and then an example of the implementation of the UE and the base station in cooperation will be given to better understand the implementation of the scheme provided in the embodiment of the present invention. Such an explanation does not mean that the two must be implemented together or separately, and actually, when the UE and the base station are implemented separately, the UE and the base station solve the problems on the UE side and the base station side, respectively, and when the two are used in combination, a better technical effect is obtained.

Fig. 2 is a schematic diagram of an implementation flow of a method for transmitting data at a transmitting end, where as shown in the figure, the method may include:

step 201, a sending end sends data in a time window in a period;

step 202, if the sending fails, the sending end resends the data in a time window with the same index in the next period; wherein the period at least comprises one or more time windows.

Fig. 3 is a schematic flow chart of an implementation of a method for receiving data at a receiving end, as shown in the figure, the method may include:

301, a receiving end receives data in a time window in a period;

step 302, if the receiving fails, the receiving end receives the data again in the time window with the same index in the next period; wherein the period at least comprises one or more time windows.

In an implementation, the period and the time window may be configured through higher layer signaling.

In implementation, configuring the period and the time window through higher layer signaling may include:

the one period contains a positive integer number of time windows.

Specifically, when transmitting data, the method may include:

a sending end determines data sent in each time window in a sending period, wherein each sending period at least comprises one or more time windows;

when the sending end sends the data to be retransmitted, the data to be retransmitted is sent according to the time window index, and the data to be retransmitted is indicated according to the index of the time window.

Sending data to be retransmitted according to the index of the time window, comprising:

determining a time window index when data needing to be retransmitted is transmitted in the current transmission period;

in the next sending period, sending data to be retransmitted in a time window with the same index;

the data needing to be retransmitted is indicated according to the index of the time window, and the method comprises the following steps:

the transmitting end and the receiving end agree in advance and/or the transmitting end indicates the receiving end, and the data needing to be retransmitted is transmitted in the time window with the same index in the next transmission period.

Correspondingly, when receiving the retransmission data, the method may include:

the receiving end determines the data received in each time window in a sending period, wherein each sending period at least comprises one or more time windows;

when receiving data to be retransmitted, a receiving end receives the data to be retransmitted according to the index of the time window, and determines the data to be retransmitted according to an indication, wherein the indication is indicated according to the index of the time window.

Receiving data to be retransmitted according to the index of the time window, comprising:

determining a time window for receiving the data to be retransmitted in the current sending period;

in the next sending period, receiving data to be retransmitted in a time window with the same index;

determining data to be retransmitted according to the indication, comprising:

The following description is made by taking an example of a base station and a terminal.

The network configures a period (period) and a start value of time (offset) so that a period of time can be determined. Fig. 4 is a first schematic diagram of data retransmission, as shown in the figure, the network configures a plurality of time windows (windows/duration) in the period duration, and the starting time point of the first time window is the same as the time starting point of the period; the period duration is an integer multiple of the time window duration.

In implementation, the data packets are transmitted in a time window within a period duration; if the transmission is not successful, the retransmission is confined to a time window with the same index number within the next cycle duration.

As shown in fig. 4, the cycle length is 160 slots, the window duration is 16 slots, and the cycle includes 10 time windows. And if the data packet sent in the window 0 in the period is transmitted in error, the data packet is sent in the time window 0 in the next period. Thus, even if the HARQ process IDs are the same in different windows, no confusion results due to retransmissions in different time windows.

And determining the HARQ process ID through the HARQ process number field at the terminal side, thereby determining the cached data packet information before and performing soft combination with the received information.

Based on the same inventive concept, the embodiment of the present invention further provides communication devices, and because the principles of solving the problems of these devices are similar to the data sending method and the data receiving method, the implementation of these devices may refer to the implementation of the method, and repeated parts are not described again.

When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.

Fig. 5 is a schematic structural diagram of a first communication device, as shown, including:

a processor 500 for reading the program in the memory 520 and processing data according to the requirement of the transceiver;

a transceiver 510 for receiving and transmitting data under the control of the processor 500, performing the following processes:

transmitting data in a time window within a period;

the one period contains a positive integer number of time windows.

Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 500, and various circuits, represented by memory 520, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

An embodiment of the present invention provides a second communications device, including:

In an implementation, the method further comprises the following steps:

the one period contains a positive integer number of time windows.

For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.

Fig. 6 is a schematic structural diagram of a third communication device, as shown in the figure, including:

a processor 600 for reading the program in the memory 620 and processing data according to the requirement of the transceiver;

a transceiver 610 for receiving and transmitting data under the control of the processor 600, performing the following processes:

receiving data in a time window within a period;

the one period contains a positive integer number of time windows.

Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.

The embodiment of the present invention provides a fourth communication device, including:

In an implementation, the method further comprises the following steps:

the one period contains a positive integer number of time windows.

The embodiment of the invention also provides a method for determining the HARQ process ID, which is explained below.

Fig. 7 is a schematic flow chart of an implementation of a method for determining a HARQ process ID, which may include:

step 701, determining the HARQ process ID through a function with a time window indication as a parameter.

In implementation, when determining the value of the HARQ process ID through a function with the time window indication as a parameter, the value may be determined through the following function:

the one period contains a positive integer number of time windows.

Specifically, when transmitting data, the method may include:

when the sending end sends the data to be retransmitted, the data to be retransmitted is sent according to the time window index and the process number of the retransmitted data, and the data to be retransmitted is indicated according to the time window index and the process number of the retransmitted data.

Sending the data to be retransmitted according to the index of the time window and the process number of the retransmitted data, comprising:

determining a time window index when data to be retransmitted is transmitted in a transmission period and a process number of the retransmitted data;

and transmitting the data to be retransmitted in the time window of the determined index.

In practice, the data to be retransmitted can be indicated and transmitted by the following formula:

the window index is a time window index representing the position of a time window for sending data needing to be retransmitted;

c is a positive integer constant or configured parameter, representing the number of the largest HARQ processes supported within a time window;

the HARQ process number is a numerical value indicated by the HARQ process number field in the DCI for the data to be retransmitted.

and when receiving the data to be retransmitted, the receiving end receives the data to be retransmitted according to the index of the time window and the process number of the retransmitted data.

Receiving data to be retransmitted according to the index of the time window and the process number of the retransmitted data, comprising:

determining a time window index of the data to be retransmitted received in the sending period and a process number of the retransmitted data according to the indication;

and receiving the data to be retransmitted in the indexed time window.

In practice, the data to be retransmitted can be determined and received by the following formula:

Period/offset/window duration based on the configuration shown in fig. 4; consider that the HARQ process ID value is determined by the HARQ process number field and the window index in the DCI in common. Therefore, the value range of the HARQ process ID can be enlarged through the window index, and the retransmission of the data packet under the condition of large propagation delay is supported.

Specifically, the HARQ process ID is a function of the window index, and can be determined by the following formula:

HARQ process ID＝window index*C+HARQ process number；

wherein, the window index represents a time window index; c is a positive integer constant or configured parameter, representing the number of the largest HARQ processes supported within a time window; the HARQ process number is a numerical value indicated by the HARQ process number field in the DCI. The method differs from method 1 in that the data packets are not necessarily restricted to be retransmitted within the corresponding time window.

Based on the same inventive concept, the embodiment of the present invention further provides communication devices, and because the principle of solving the problem of these devices is similar to the determination method of the HARQ process ID, the implementation of these devices may refer to the implementation of the method, and repeated details are not repeated.

Fig. 8 is a schematic structural diagram of a fifth communication device, as shown in the figure, including:

the processor 800, which is used to read the program in the memory 820, executes the following processes:

a transceiver 810 for receiving and transmitting data under the control of the processor 800.

the one period contains a positive integer number of time windows.

Where in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 800 and memory represented by memory 820. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 810 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 in performing operations.

An embodiment of the present invention provides a sixth communications device, including:

In an implementation, the method further comprises the following steps:

the one period contains a positive integer number of time windows.

The embodiment of the invention also provides a data sending and receiving scheme, which is explained below.

Fig. 9 is a schematic flow chart of a second implementation of a data transmission method at a transmitting end, and as shown in the figure, the data transmission method may include:

step 901, a sending end sends data;

step 902, if the transmission fails, the transmitting end retransmits the data within a preset time period after the failure indication.

Fig. 10 is a schematic flow chart of a second implementation of a receiving method of data at a receiving end, as shown in the figure, the receiving method may include:

1001, receiving data by a receiving terminal;

step 1002, if the receiving fails, the receiving end receives the data again within a preset time period after the failure indication.

In the implementation, the time difference is a time slot difference between the initial time slot of the monitoring window of the receiving end and the time slot of the failure indication; or the time slot difference between the initial time slot of the monitoring window and the last time slot of a plurality of continuous uplink time slots in which the NACK is sent is detected by the receiving end.

Specifically, when the retransmission data is transmitted, the method may include:

a sending end receives an indication of data receiving failure sent by a receiving end;

the sending end determines the sending time slot of the indication;

and the sending end sends the data to be retransmitted in a preset time period and indicates that the data to be retransmitted is sent.

the receiving end sends failure indication to the sending end after the data receiving fails;

the receiving end determines the sending time slot of the failure indication;

and the receiving end receives the data to be retransmitted in a preset time period and determines whether the received data is the data to be retransmitted or not according to the indication.

In an implementation, the failure indication is a NACK sent on PUCCH by the receiving end.

In a specific implementation, the failure indication is identified by the HARQ process, and indicates that the data to be retransmitted is sent in the NDI indication.

In a specific implementation, the HARQ process id is indicated by a HARQ process number.

In implementation, the preset time period is sent to the receiving end by the sending end through high-level information.

In specific implementation, the time difference is a time slot difference between a receiving end monitoring window starting time slot and a time slot in which a failure indication is located; or the time slot difference between the initial time slot of the monitoring window of the receiving end and the last time slot of a plurality of continuous uplink time slots in which the NACK is sent.

Fig. 11 is a schematic diagram of data retransmission, in which a retransmission timeslot is related to a PUCCH (Physical Uplink Control Channel), the upper part is TDD, and the lower part is FDD, as shown in the figure, after receiving ACK/NACK feedback from a terminal, a base station knows whether data packet is successfully transmitted, and then determines whether to retransmit the data packet. That is, the time slot in which the data packet retransmitted by the base station side is located is related to the time slot in which the base station side monitors ACK/NACK.

Specifically, the terminal monitors the data packet, and the monitoring fails; the terminal sends NACK on PUCCH indicated by the base station;

after monitoring NACK, the base station knows that the data packet transmission fails; the base station side can retransmit the data packet within a period of time after the time slot of the NACK is sent;

and the terminal side monitors in the corresponding time duration, if the corresponding HARQ process is monitored and the NDI indicates that the data packet is the retransmission data, the terminal considers that the data packet is the retransmission data packet, performs soft combination with the data information of the last time or a plurality of times, and further performs data monitoring.

If the duration exceeds the time limit, even if the data packets with the same HARQ process number are monitored and the NDI indicates retransmission data, the terminal does not consider the retransmission of the data packet (possibly, the retransmission of the data packet with the same HARQ process ID after the data packet). Wherein, the HARQ process ID may be indicated by HARQ process number.

The preset time interval, that is, the offset value may be a time slot offset between a monitoring window start time slot and a time slot in which NACK is transmitted; or detecting the time slot offset between the initial time slot of the monitoring window and the last time slot of a plurality of continuous uplink time slots in which the NACK is transmitted. The specific offset value and the parameter of the monitoring window are sent to the terminal by the base station through high-level information.

Fig. 12 is a schematic structural diagram of a seventh communication device, which is shown in the figure and includes:

a processor 1200, configured to read the program in the memory 1220, and perform data processing according to the needs of the transceiver;

a transceiver 1210 for receiving and transmitting data under the control of the processor 1200, performing the following processes:

sending data;

Where in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.

An eighth communication device provided in an embodiment of the present invention includes:

the second sending module is used for sending data;

Fig. 13 is a schematic structural diagram of a ninth communication device, as shown in the figure, including:

a processor 1300, for reading the program in the memory 1320, and processing data according to the requirement of the transceiver;

a transceiver 1310 for receiving and transmitting data under the control of the processor 1300, performing the following processes:

receiving data;

In fig. 13, among other things, the bus architecture may include any number of interconnected buses and bridges with various circuits being linked together, particularly one or more processors represented by processor 1300 and memory represented by memory 1320. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1310 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. User interface 1330 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1320 may store data used by the processor 1300 in performing operations.

An embodiment of the present invention provides a tenth communications device, including:

In summary, the embodiment of the present invention provides a data retransmission scheme, which specifically includes:

retransmitting in a time window with the same number in a period duration; further provides a corresponding period, a starting point and a time window configuration scheme.

Determining the HARQ process ID through the window index and the HARQ process number domain; further provided is a function of the HARQ process ID and the window index.

And further providing a specific offset value configuration scheme according to the retransmission of the time slot position and the time slot of the NACK sent by the terminal.

By adopting the technical scheme provided by the embodiment of the invention, the problem of data retransmission under large propagation delay in an NTN scene is effectively solved.

DCI bits of an HARQ process number field in DCI are not increased, and control information overhead is reduced.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for transmitting data, comprising:

a sending end sends data in a time window in a period;

2. The method of claim 1, wherein the periodicity and time window are configured by higher layer signaling.

3. The method of claim 1 or 2, wherein configuring the periodicity and time window by higher layer signaling comprises:

the one period contains a positive integer number of time windows.

4. A method for receiving data, comprising:

a receiving end receives data in a time window in a period;

5. The method of claim 4, wherein the periodicity and time window are configured by higher layer signaling.

6. The method of claim 4 or 5, wherein configuring the periodicity and time window by higher layer signaling comprises:

the one period contains a positive integer number of time windows.

7. A method for determining hybrid automatic repeat request process identification (HARQ process ID), comprising:

8. The method of claim 7, wherein the value of the HARQ process ID is determined by a function with a time window index as a parameter by:

9. The method of claim 7 or 8, wherein the time window is configured by higher layer signaling.

10. The method of claim 9, wherein configuring the time window via higher layer signaling comprises:

the one period contains a positive integer number of time windows.

11. A method for transmitting data, comprising:

a sending end sends data;

12. The method of claim 11, wherein the failure indication is a NACK indication transmitted on a physical uplink control channel, PUCCH, by a receiving end.

13. The method as claimed in claim 11, wherein the duration of the period and/or the time difference between the preset period and the failure indication is transmitted to a receiving end through higher layer information.

14. The method of claim 13, wherein the time difference is a time slot difference between a receiving end monitoring window start time slot and a time slot in which a failure indication is located; or the time slot difference between the initial time slot of the monitoring window and the last time slot of a plurality of continuous uplink time slots in which the NACK is sent is detected by the receiving end.

15. A method for receiving data, comprising:

a receiving end receives data;

16. The method of claim 15, wherein the failure indication is a NACK indication sent on PUCCH by a receiving end.

17. The method as claimed in claim 15, wherein the duration of the preset time period and/or the time difference between the preset time period and the failure indication is transmitted to a receiving end through higher layer information.

18. The method of claim 17, wherein the time difference is a time slot difference between a receiving end monitoring window start time slot and a time slot in which a failure indication is located; or the time slot difference between the initial time slot of the monitoring window of the receiving terminal and the last time slot of the continuous uplink time slots where the time slot of the failure indication is located.

19. A communication device, comprising:

transmitting data in a time window within a period;

Or, comprising:

20. A communication device, comprising:

receiving data in a time window within a period;

Or, comprising:

21. A communication device, comprising:

Or, comprising:

22. A communication device, comprising:

sending data;

Or, comprising:

the second sending module is used for sending data;

23. A communication device, comprising:

receiving data;

Or, comprising:

24. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 18 when executing the computer program.

25. A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 18.