CN114765821A

CN114765821A - Data transmission method, cell residence method, device and medium

Info

Publication number: CN114765821A
Application number: CN202110056285.0A
Authority: CN
Inventors: 韩立锋
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2022-07-19

Abstract

A data transmission method, a cell residence method, a device and a medium are provided, wherein the data transmission method comprises the following steps: determining an anchor cell for data transmission; and carrying out data transmission through the anchor cell. The scheme can avoid resource waste in the coverage time period of the NTN cell.

Description

Data transmission method, cell residence method, device and medium

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method, a cell camping method, an apparatus, and a medium.

Background

The NB-IoT type devices can transmit data over the wireless network to interact with information with the corresponding NB-IoT traffic server. In the existing protocol, the NB-IoT device accesses a Terrestrial wireless Network (TN), and naturally does not need to support mobility, so its design is very simple and does not support a handover procedure.

However, with the increasing popularity of NB-IoT devices, NB-IoT devices deployed in the field have emerged, and these regions may not have TN coverage, so data can only be transmitted over Non-Terrestrial wireless networks (NTN). TN networks differ from NTN networks in that the base stations used by TN networks are typically fixed to the ground and the satellites used by NTN networks orbit the earth in the air.

The NB-IoT device may support very weak wireless signal coverage, that is, the downlink signal experiences very large transmission attenuation from the base station to the terminal, and the signal strength of the downlink signal detected by the terminal is very weak, and accordingly, the uplink signal sent by the terminal to the network also experiences the same transmission attenuation, and the signal strength when reaching the base station is also very weak. For NB-IoT devices, no matter uplink data or downlink data, because the signal strength is weak, the probability of being correctly decoded by the receiving party is much lower than that of a common terminal, and therefore, the NB-IoT devices adopt a mode of transmitting the same data for multiple times, and the receiving party performs signal combination, so that the probability of being correctly decoded by the receiving party is increased, and specific transmission times can be configured according to different transmission attenuations.

Since the NB-IoT device usually transmits the same packet multiple times, in the NTN environment, before the NB-IoT device starts transmitting the packet, it calculates how long the current NTN cell can still cover itself, and then determines whether to start transmitting. However, the above scheme may cause that no NB-IoT device transmits data for a part of the coverage time period of one NTN cell, resulting in resource waste.

Disclosure of Invention

The embodiment of the invention solves the technical problem of resource waste in the coverage time period of the NTN cell.

To solve the foregoing technical problem, an embodiment of the present invention provides a data transmission method, including: determining an anchor cell for data transmission; and transmitting data through the anchor cell.

Optionally, the performing data transmission through the anchor cell includes: determining a transmission time window for data transmission in the anchor cell; and transmitting data through the anchor cell within the transmission time window.

Optionally, the performing, in the transmission time window, data transmission through the anchor cell includes: and when detecting that the transmission times M of the target data which is transmitted after the current transmission time window is finished is less than the configured transmission times N, transmitting the target data for N-M times in the next transmission time window.

Optionally, the transmitting the target data N-M times in the next transmission time window includes: receiving the issued indication information; and transmitting the target data for N-M times in the next transmission time window according to the indication information.

Optionally, the delivered indication information is received when the current transmission window ends, or the delivered indication information is received when the next transmission time window begins.

Optionally, the indication information is carried by any one of the following signaling: MAC CE, RRC message, downlink control information for uplink scheduling, and downlink control information for downlink scheduling.

Optionally, after detecting that the number M of transmission times of the transmission target data completed in the current transmission time window is less than the configured number N of transmission times, the method further includes: and transmitting the target data N-M times in a next time window corresponding to the anchor cell.

Optionally, the transmitting the target data N-M times in the next time window corresponding to the anchor cell includes: and in the next time window corresponding to the anchor cell, adopting the key used in the current transmission time window to carry out data transmission.

Optionally, the transmitting the target data N-M times in the next time window corresponding to the anchor cell includes: and transmitting the target data for N-M times by adopting the key used by the current transmission time window in the next time window corresponding to the anchor cell, and performing new data transmission by using a new key corresponding to the next time window.

Optionally, after detecting that the number M of transmission times of the transmission target data completed in the current transmission time window is less than the configured number N of transmission times, before the next transmission time window comes, the method further includes: and suspending counting of the timer and the counter of the MAC layer and the timer and the counter of the RLC layer.

Optionally, the determining an anchor cell for data transmission includes: acquiring ephemeris information of a non-ground wireless network cell which can be resided; according to the ephemeris information, selecting the anchor cell from the non-ground wireless network cells which can be resided; and sending a first notification message to a base station corresponding to the anchor cell, wherein the first notification message is used for indicating the transmission time window.

Optionally, after sending the notification message to the target non-terrestrial wireless network cell, the method further includes: and receiving response information sent by the base station corresponding to the anchor cell, wherein the response information corresponds to the first notification message.

Optionally, the receiving response information sent by the base station corresponding to the anchor cell includes: and acquiring the cell wireless network temporary identifier distributed with the anchor cell from the response information.

Optionally, the transmission time window is a whole time period or a part of time period covered by the anchor cell.

Optionally, the determining an anchor cell for data transmission includes: reporting the geographical position information to a service server; receiving a second notification message issued by the service server, where the second notification message includes identification information of the anchor cell, and the second notification message is generated by the service server according to the following parameters: the geographical position information is ephemeris information of a non-ground wireless network cell; and sending a third notification message to the base station corresponding to the anchor cell, wherein the third notification message is used for notifying the base station that the anchor cell is selected.

Optionally, the third notification message is further used to indicate a transmission period for data transmission.

Optionally, the data transmission method further includes: and sending a fourth notification message to the base station corresponding to the anchor cell, wherein the fourth notification message is used for indicating the transmission time window.

Optionally, the second notification message is generated by the service server freezing the following parameters: the geographical position information and ephemeris information of the non-ground wireless network cell.

The embodiment of the invention also provides a non-ground wireless network cell residence method, which comprises the following steps: acquiring ephemeris information of a non-ground wireless network cell which can be resided; according to the ephemeris information, selecting a target non-ground wireless network cell from the resident non-ground wireless network cells as an anchor cell; and sending a first notification message to a base station corresponding to the anchor cell, wherein the first notification message is used for indicating a transmission time window for data transmission.

Optionally, the receiving response information sent by the base station corresponding to the anchor cell includes: and acquiring the cell radio network temporary identifier corresponding to the anchor cell from the response information.

The embodiment of the invention also provides another non-ground wireless network cell residence method, which comprises the following steps: reporting the geographical position information to a service server; receiving a second notification message issued by the service server, wherein the second notification message comprises identification information of a target non-ground wireless network cell; and sending a third notification message to the base station corresponding to the target non-ground wireless network cell, wherein the third notification message is used for notifying the base station that the target ground wireless network cell is selected as an anchor cell.

Optionally, the method for camping in a non-terrestrial wireless network cell further includes: and sending a fourth notification message to the base station corresponding to the anchor cell, wherein the fourth notification message is used for indicating a transmission time window for data transmission.

Optionally, the second notification message is generated by the service server according to the following parameters: the geographical position information and ephemeris information of the non-ground wireless network cell.

The embodiment of the invention also provides a non-ground wireless network cell residing method, which comprises the following steps: acquiring geographical position information of user equipment and ephemeris information of a non-ground wireless network cell; determining an anchor cell corresponding to the user equipment according to the geographical position information of the user equipment and the ephemeris information of the non-ground wireless network cell; and issuing a second notification message to the user equipment, wherein the second notification message comprises the identification information of the anchor cell.

Optionally, the ephemeris information of the non-terrestrial wireless network cell includes: ephemeris information of a non-terrestrial wireless network cell related to the geographical location information of the user equipment.

Optionally, the determining, according to the geographical location information of the user equipment and the ephemeris information of the non-ground wireless network cell, an anchor cell corresponding to the user equipment includes: acquiring load information corresponding to each non-ground wireless network cell; and determining the non-ground wireless network cell with the load value smaller than the preset value as an anchor cell corresponding to the user equipment.

Optionally, after determining the anchor cell corresponding to the user equipment, the method further includes: and sending the identification information of the anchor cell to a base station corresponding to the anchor cell.

An embodiment of the present invention further provides a data transmission device, including: a first determining unit configured to determine an anchor cell used for data transmission; and the transmission unit is used for carrying out data transmission through the anchor cell.

The embodiment of the invention also provides a non-ground wireless network cell residence device, which comprises: the first acquisition unit is used for acquiring ephemeris information of a non-ground wireless network cell which can be resided; a first selection unit, configured to select a target non-ground wireless network cell as an anchor cell from the non-ground wireless network cells that can reside according to the ephemeris information; a first sending unit, configured to send a first notification message to a base station corresponding to the anchor cell, where the first notification message is used to indicate a transmission time window for data transmission.

The embodiment of the invention also provides another non-ground wireless network cell residence device, which comprises: a reporting unit, configured to report the geographical location information to a service server; a receiving unit, configured to receive a second notification message sent by the service server, where the second notification message includes identification information of a target non-terrestrial wireless network cell; and a second sending unit, configured to send a third notification message to a base station corresponding to the target non-ground wireless network cell, where the third notification message is used to notify the base station that the target ground wireless network cell is selected as an anchor cell.

The embodiment of the invention also provides another non-ground wireless network cell residence device, which comprises: the second acquisition unit is used for acquiring the geographical position information of the user equipment and ephemeris information of the non-ground wireless network cell; a second determining unit, configured to determine, according to the geographical location information of the user equipment and ephemeris information of the non-ground wireless network cell, an anchor cell corresponding to the user equipment; a third sending unit, configured to issue a second notification message to the user equipment, where the second notification message includes the identifier information of the anchor cell.

An embodiment of the present invention further provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and stores a computer program thereon, where the computer program is executed by a processor to perform any of the steps of the data transmission method described above, or to perform any of the steps of the non-terrestrial wireless network cell residence method described above.

The embodiment of the invention also provides a non-ground wireless network cell residence device, which comprises a memory and a processor, wherein the memory is stored with a computer program capable of running on the processor, and the processor executes any step of the non-ground wireless network cell residence method when running the computer program.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:

after determining the anchor cell and the transmission time window for data transmission, when detecting that the transmission times M of the transmission target data does not reach the configured transmission times N when the current transmission time window is ended, transmitting the target data N-M times in the next transmission time window, and the coverage time period of the NTN cell can be fully utilized to avoid resource waste of the coverage time period of the NTN cell.

One or more non-terrestrial wireless network cells are selected from the camping-capable non-terrestrial wireless network cells as anchor cells, which may be dedicated for NB-IoT communication. And the NB-IoT equipment only carries out data transmission with the anchor cell, so that the monitoring times of the NB-IoT equipment can be reduced, and the power consumption of the NB-IoT equipment can be reduced.

Drawings

FIG. 1 is a flow chart of a data transmission method in an embodiment of the present invention;

fig. 2 is a flowchart of a method for camping in a non-terrestrial wireless network cell according to an embodiment of the present invention;

fig. 3 is a flowchart of another non-terrestrial wireless network cell camping method in an embodiment of the present invention;

fig. 4 is a flowchart of a cell camping method of a non-terrestrial wireless network according to another embodiment of the present invention;

fig. 5 is a schematic structural diagram of a data transmission apparatus in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a non-terrestrial wireless network cell camping apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another non-terrestrial wireless network cell camping apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a cell camping apparatus in a non-terrestrial wireless network according to another embodiment of the present invention.

Detailed Description

In the prior art, an NB-IoT device finds that 10ms remains in the coverage duration of a current NTN cell, and needs to transmit a data packet once every 1ms, and if the transmission of one data packet needs to be repeated 20 times under the current signal strength condition, the NB-IoT device determines that the 10ms cannot complete 20 times of repeated transmission, and therefore does not start transmission in the current NTN cell, but starts transmission when the next NTN cell covers itself.

Therefore, the above scheme may cause that no NB-IoT device transmits data in a coverage time period of one NTN cell in a part of time, which results in resource waste.

In the embodiment of the invention, after the anchor cell and the transmission time window for data transmission are determined, when the transmission times M of transmitting the target data at the end of the current transmission time window are detected to not reach the configured transmission times N, the target data are transmitted for N-M times in the next transmission time window, the coverage time period of the NTN cell can be fully utilized, and the resource waste of the coverage time period of the NTN cell is avoided.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the embodiment of the present invention, the data transmission method provided in the following steps S101 to S102 may be executed by the user equipment. Specifically, the following steps S101 to S102 may be executed by a baseband chip in the user equipment, or executed by a chip module including the baseband chip in the user equipment.

An embodiment of the present invention provides a data transmission method, which is described in detail below with reference to fig. 1 through specific steps.

Step S101, an anchor cell for data transmission is determined.

And step S102, carrying out data transmission through the anchor cell.

In a particular implementation, the anchor cell for data transmission may be determined by the user equipment itself. After determining the anchor cell for data transmission, the user equipment may also determine a transmission time window for data transmission through the anchor cell.

In practical applications, it is known that, in different time periods, the user equipment may be covered by NTN cells corresponding to different satellites, and therefore, the user equipment may obtain ephemeris information covering a Non-Terrestrial access Network (NTN) cell of the user equipment. In the embodiment of the present invention, the NTN cell obtained by the user equipment and covering the user equipment may be an NTN cell to which the user equipment can access, or a potential NTN cell to which the user equipment can access.

In a specific implementation, the base station may issue, to the ue, the ephemeris information of the NTN cell corresponding to the ue, for example, the base station broadcasts, to the ue, the ephemeris information of the NTN cell corresponding to the ue in a broadcast manner.

In the embodiment of the invention, the user equipment can be NB-IoT equipment. Typically, an NB-IoT device may be in a certain fixed area for a period of time. Therefore, ephemeris information of NTN cells that can cover the fixed area may also be stored in the NB-IoT device in advance.

It is to be understood that, the specific manner for the ue to acquire the ephemeris information of the NTN cell where the ue can camp is not limited to the above examples, and all methods for enabling the ue to acquire the ephemeris information of the NTN cell where the ue can camp do not affect the protection scope of the embodiment of the present invention.

In practical application, it is known that the ue may correspond to different NTN cells in different time periods. Thus, the user equipment may determine the time period for which each NTN cell that can camp on covers itself. For example, the user equipment 1 knows that during time period 0: 00-2: 00, an NTN cell covering the user equipment 1 is an NTN cell 1; in the time period 2: 00-4: 00, the NTN cell covering the user equipment 1 is the NTN cell 2. It should be noted that the correspondence between the time period covering the ue and the NTN cell is only an exemplary description, and does not represent that the same correspondence as the example is used in a specific application process.

In a specific implementation, the ue may obtain a reference signal (e.g., a synchronization signal block) of the NTN cell where the ue can camp, and obtain signal quality. Then, the ue may determine, by combining the reference signal, ephemeris information of the NTN cell, and geographical location information corresponding to the ue itself, a time period for the NTN cell where the ue can camp to cover the ue itself.

In the embodiment of the present invention, the geographic location information corresponding to the user equipment may be longitude and latitude coordinate information of a current location of the user equipment, or may be other information capable of representing a specific location of the user equipment.

After determining the time period that the residing NTN cell covers itself, the user equipment may select one NTN cell as a target NTN cell, or may select multiple NTN cells as target NTN cells. In the embodiment of the present invention, for simplicity, the target NTN cell is simply referred to as an anchor cell (anchor cell).

In a specific implementation, the ue may obtain a reference signal (e.g., a synchronization signal block) of the NTN cell where the ue can camp, and obtain signal quality. Then, the ue may determine the anchor cell by combining the reference signal and the ephemeris information of the NTN cell.

In a specific implementation, the ue may also determine the anchor cell according to the reference signal and the ephemeris information of the NTN cell.

In a specific implementation, the ue may further determine an anchor cell according to a satellite operation period corresponding to the NTN cell, in combination with obtaining a reference signal (e.g., a synchronization signal block) of the NTN cell where the ue can camp.

It can be understood that the specific manner of determining the anchor cell by the user equipment may also include other manners, and the embodiment of the present invention is not particularly limited.

In practical applications, when the ue is an NB-IoT device, the corresponding data transmission time period is relatively fixed, and the data transmission amount is relatively small, so that an NTN cell in a certain specific time period may be selected as an anchor cell.

After selecting the anchor cell, the user equipment may send a first notification message to a base station corresponding to the anchor cell. In the first notification message, indication information for indicating a transmission time window and a transmission period may be carried. And after receiving the first notification message, the base station corresponding to the anchor cell can acquire a transmission time window for the user equipment to perform data transmission.

It should be noted that the transmission time window selected by the user equipment means that there is a possibility of transmitting data within the transmission time window, but the data is not necessarily transmitted. For example, if there is no data to be transmitted in a certain transmission time window, the ue does not need to perform data transmission in the transmission time window.

In the embodiment of the present invention, the information sent by the ue to the base station corresponding to the anchor cell may include "a covered time period (T1, T2) selected by the ue, that is, a transmission time window selected by the ue is T1 to T2.

T1, T2 may be GPS time, UTC time, or time with arbitrarily selected start and end time points. T1 and T2 may also be identified by parameters that can represent timing, such as a radio frame, a subframe, a slot number, and a sign bit in the wireless communication system, which is not limited in the embodiments of the present invention.

In a specific implementation, after receiving the first notification message, the base station corresponding to the anchor cell may send response information corresponding to the first notification message to the user equipment to inform the user equipment.

In the embodiment of the present invention, after receiving the first notification message, the base station corresponding to the anchor cell may allocate a corresponding cell radio network temporary identity (C-RNTI) to the user equipment. And after receiving the response information, the user equipment can acquire the C-RNTI allocated to the user equipment by the base station corresponding to the anchor cell. The user equipment can directly use the C-RNTI in the subsequent data transmission process through the anchor cell without requesting the base station to distribute the C-RNTI through a random access process.

In a specific implementation, an anchor cell used by the ue for data transmission and a transmission time window for the ue to perform data transmission in the anchor cell may also be obtained by the base station. The base station issues the anchor cell and the transmission time window for data transmission to the user equipment, so that the user equipment can determine the anchor cell for data transmission and the transmission time window for data transmission of the user equipment in the anchor cell.

The base station may issue higher layer signaling to the user equipment to issue an anchor cell and a transmission time window for data transmission to the user equipment. The higher layer signaling may be Radio Resource Control (RRC) signaling, Downlink Control Information (DCI), or other types of signaling such as MAC CE.

In the embodiment of the invention, the user equipment can report the geographical position information to the service server through the application layer information. The geographical location information corresponding to the user equipment may be longitude and latitude coordinate information of a current location of the user equipment, or may be other information capable of representing a specific location of the user equipment.

The service server may receive NTN ephemeris information provided by the wireless network element. And determining an anchor cell corresponding to the user equipment according to the geographical position information of the user equipment and the ephemeris information of the NTN cell.

The NTN ephemeris information provided by the wireless network element may include ephemeris information of all NTN satellites currently operated by the wireless network, or ephemeris information of NTN satellites obtained by the wireless network screening. The wireless network can screen out the ephemeris information of part of NTN satellites related to the current service from the ephemeris information of all NTN satellites currently running.

In the embodiment of the present invention, the radio network element may further provide load information of each NTN cell to the service server. The service server may select an NTN cell with a smaller load as an anchor cell of the user equipment according to the load information of each NTN cell.

The service server may issue a second notification message to the user equipment, where the second notification message carries identification information corresponding to the anchor cell. After receiving the second notification message, the user equipment may obtain the identification information corresponding to the anchor cell, and further know in which anchor cell to perform data transmission.

In the embodiment of the invention, the service server can issue the second notification message through the application layer message.

After obtaining the identification information corresponding to the anchor cell, the user equipment may send a third notification message to the base station corresponding to the anchor cell to notify the base station corresponding to the anchor cell that the anchor cell is selected.

For example, the user equipment acquires that the identification information corresponding to the anchor cell is 1. And the user equipment sends a third notification message to the base station corresponding to the anchor cell 1. And after receiving the third notification message, the base station corresponding to the anchor cell 1 can know that the anchor cell 1 is selected.

In the embodiment of the present invention, a notification may also be sent to the base station by the service server to notify that the anchor cell is selected. Specifically, the service server may notify the base station that a certain anchor cell is selected through a core network element (AMF).

In the embodiment of the present invention, the third notification message may also carry a transmission cycle indicating data transmission, that is, a cycle corresponding to the transmission time window.

In specific implementation, the ue may further send a fourth notification message to the base station corresponding to the anchor cell, where the fourth notification message may carry information for indicating a transmission time window. After receiving the fourth notification message, the base station corresponding to the anchor cell can acquire the transmission time window corresponding to the user equipment.

In the embodiment of the invention, when the user equipment is NB-IoT equipment, the service server can be an NB-IoT service server.

In a specific implementation, the transmission time window corresponding to the ue may be a total time period covered by the anchor cell, or may be a partial time period covered by the anchor cell. The specific time length of the transmission time window may be configured by the base station or may be set by the user equipment.

Step S102, when the transmission times M of the transmission of the target data is detected to be less than the configured transmission times N when the current transmission time window is ended, the target data is transmitted for N-M times in the next transmission time window.

In a specific implementation, the ue may listen to the anchor cell for downlink data transmission and/or uplink data transmission in each transmission time window. If the downlink data transmission exists, the user equipment can receive the downlink data transmitted by the anchor cell; if downlink data transmission does not exist and uplink data transmission does not exist, the downlink monitoring can be finished in advance; if there is no downlink data transmission but there is an uplink data transmission, the user equipment may continue listening.

In the embodiment of the present invention, if the user equipment monitors that there is downlink target data transmission in the current transmission time window and the transmission frequency M of the target data is less than the preconfigured transmission frequency N, the target data may be repeatedly received N-M times in the next transmission time window.

If the user equipment has uplink target data transmission in the current transmission time window and the transmission times M of the target data are less than the pre-configured transmission times N, the target data can be repeatedly sent for N-M times in the next transmission time window.

In a specific implementation, the preconfigured transmission number N may be configured by the base station, and is issued to the user equipment by the base station through a high-level signaling.

In the embodiment of the invention, the user equipment can continue to transmit the target data for N-M times unconditionally when the next transmission time window is reached. The user equipment can also continue to transmit the target data for N-M times according to the indication of the indication information after receiving the indication information issued by the base station. In the embodiment of the invention, aiming at the uplink target data, the target data transmission refers to the transmission of the target data; for downlink target data, transmitting target data means receiving target data.

In the embodiment of the invention, the base station can issue the indication information to the user equipment when the current transmission time window is finished, and the user equipment receives the indication information when the current transmission time window is finished. The base station may also issue indication information to the user equipment when a next transmission time window starts, and the user equipment receives the indication information when the next transmission time window starts.

Specifically, the base station may issue the indication information in the last subframe of the current transmission time window, or in the last transmission time interval, or in the last time slot. The base station may also issue the indication information in the first subframe of the next transmission time window, or issue the indication information in the first transmission time interval, or issue the indication information in the first time slot.

The base station may also issue the indication information at the last X subframes of the current transmission time window, or issue the indication information at the last X transmission time intervals, or issue the indication information at the last X time slots. The base station can also send the indication information at the first X subframes of the next transmission time window, or send the indication information at the first X transmission time intervals, or send the indication information at the first X time slots; x is more than 1.

In the embodiment of the present invention, the indication information issued by the base station may also be repeated multiple times, that is, the base station may repeatedly issue multiple indication information to the user equipment. If the repetition frequency of the indication information issued by the base station is Y, the base station can issue the indication information in the last Y subframes of the current transmission time window, or can select Y subframes to issue the indication information in the last Z subframes of the current transmission time window, wherein Z is larger than Y.

In the embodiment of the present invention, the base station may issue the indication information to the user equipment through the MAC CE, or issue the indication information to the user equipment through a separate DCI, or carry the indication information through a field in the DCI for uplink scheduling, or carry the indication information through a field in the DCI for downlink scheduling.

It can be understood that the base station may issue the indication information to the user equipment through other transmission manners, and the embodiment of the present invention does not limit the specific format of the indication information issued by the base station.

In a specific implementation, the indication information issued by the base station may be a boolean parameter, and the boolean parameter is only used to indicate "continue transmission" or "no longer transmit".

The indication information issued by the base station may also indicate the number of times that the user equipment is expected to transmit the target data in the next transmission time window. For example, the base station indicates an integer of 0 to N-M in the transmitted indication information, and if the numerical value indicated in the indication information is 0, it indicates that the user equipment does not need to retransmit the target data in the next transmission time window; if the value indicated in the indication information is a positive integer, the value represents the number of times that the user equipment retransmits the target data in the next transmission time window.

In the embodiment of the present invention, if each time window covered by the anchor cell is configured as a transmission time window, the next transmission time window refers to the next time window of the anchor cell. The transmission time window covered by the next anchor cell is not necessarily the next time window of the anchor cell, if the part of the time window covered by the anchor cell is configured as the transmission time window.

In a specific implementation, after detecting that the transmission number M of the target data completing transmission in the current transmission time window is less than the configured transmission number N, the target data may also be transmitted N-M times in a next time window corresponding to the anchor cell.

It should be noted that, if the next time window corresponding to the anchor cell is not the transmission time window, when the target data is transmitted, it needs to be determined in advance that the user equipment can perform corresponding data transmission in the time window. In a specific application, the base station may configure the ue to be able to transmit the target data within the time window, or the protocol may specify that the ue is able to transmit the target data within the time window.

In the embodiment of the present invention, if the next time window corresponding to the anchor cell is not the transmission time window and data transmission in the time window is already configured, and if the user equipment has been pre-configured with the C-RNTI, the user equipment may perform data transmission with the anchor cell by using the pre-configured C-RNTI in the next time window.

If the next time window corresponding to the anchor cell is not the transmission time window and data transmission in the time window is configured, the user equipment may also send request information to the base station corresponding to the anchor cell to request the base station corresponding to the anchor cell to allocate the C-RNTI to the base station. After receiving the request information, the base station corresponding to the anchor cell may configure a new C-RNTI for the user equipment, and issue the C-RNTI to the user equipment through the allocation information. And after receiving the allocation information, the user equipment can acquire the new C-RNTI and use the new C-RNTI for data transmission with the anchor cell.

If the next time window corresponding to the anchor cell is not the transmission time window and data transmission in the time window is configured, in the next time window, the user equipment may perform data transmission by using the key used in the current transmission time window or by using a new key corresponding to the next time window. Specifically, the used key (the key corresponding to the current transmission time window) or the new key (the key configured in the next time window) may be configured by the base station, or may be predefined by the protocol.

In the embodiment of the present invention, in the next time window, the ue may retransmit the data that has not been transmitted in the current transmission time window N-M times, using the key used in the current transmission time window. And if other new data need to be transmitted, transmitting the new data by using the new key in the next time window.

In a specific implementation, after detecting that the transmission number M of the transmission target data completed in the current transmission time window is less than the configured transmission number N, before the next transmission time window comes, the MAC layer timer and the timer, the RLC layer timer and the timer may also be suspended for counting, and when the next transmission time window comes, the timer and the timer suspended for counting are updated correspondingly.

In a specific application, the MAC layer timer and the timer may include the following: BeamFailureRecoveryTimer, beamFailureDetectionTimer f, configuredGrantTimer, timeAlignmentTimer, ra-contentResolutionTimer, cg-ReconsTimer, sr-ProhibitTimer, periodicBSR-Timer, logicalChannelSR-DelayTimer, phr-PeriodicTimer, phr-ProhibitTimer, mpe-ProhibitTimer, drx-InactiviTimer, drx-ReconsrDL, drx-ReconssryRTT, drx-DeutyRTT, drivertyRTT, DeutyDelityHARQ and RaftinHARQ. The RLC layer timer and timers may include the following: t-PollRecransmit, t-Reassembly and t-StatusProhibit.

It will be appreciated that the MAC layer timer and timers, the RLC layer timer and timers may also include other parameters that may be suspended from updating until the next transmission time window, and updated accordingly when the next transmission time window arrives.

Therefore, after the anchor cell and the transmission time window for data transmission are determined, when the fact that the transmission times M of the target data transmission at the end of the current transmission time window do not reach the configured transmission times N is detected, the target data are transmitted for N-M times in the next transmission time window, the coverage time period of the NTN cell can be fully utilized, and the resource waste of the coverage time period of the NTN cell is avoided.

The embodiment of the invention also provides a non-ground wireless network cell residence method, which is described in detail by referring to fig. 2 through specific steps.

In the embodiment of the present invention, the non-terrestrial wireless network cell camping method provided in the following steps S201 to S205 may be performed by a user equipment. Specifically, the following steps S201 to S205 may be executed by a baseband chip in the user equipment, or executed by a chip module including the baseband chip in the user equipment.

Step S201, ephemeris information of a non-ground wireless network cell where the satellite can reside is acquired.

In particular implementations, an anchor cell for data transmission and a transmission time window for data transmission by a user equipment within the anchor cell may be determined by the user equipment itself.

In practical applications, it is known that, in different time periods, the ue may be covered by NTN cells corresponding to different satellites, and therefore, the ue may obtain ephemeris information covering a Non-Terrestrial access Network (NTN) cell of the ue. In the embodiment of the present invention, the NTN cell obtained by the user equipment and covering the user equipment may be an NTN cell to which the user equipment can access, or a potential NTN cell to which the user equipment can access.

Step S202, according to the ephemeris information, selecting a target non-ground wireless network cell as an anchor cell from the resident non-ground wireless network cells.

In specific implementation, the ue may obtain a reference signal (e.g., a synchronization signal block) of an NTN cell where the ue can camp, and determine a time period for the NTN cell where the ue can camp to cover the ue by combining ephemeris information of the NTN cell and geographical location information corresponding to the ue.

In a specific implementation, after determining a time period that the NTN cell capable of camping covers itself, the user equipment may select one NTN cell as a target NTN cell, or may select multiple NTN cells as target NTN cells. In the embodiment of the present invention, for simplicity, the target NTN cell is simply referred to as an anchor cell (anchor cell).

In practical applications, it is known that, when the ue is an NB-IoT device, the corresponding data transmission time period is relatively fixed, and the data transmission amount is relatively small, so that an NTN cell in a certain specific time period may be selected as an anchor cell.

Step S203, sending a first notification message to the base station corresponding to the anchor cell.

In a specific implementation, after selecting the anchor cell, the ue may send a first notification message to a base station corresponding to the anchor cell. In the first notification message, indication information for indicating a transmission time window and a transmission period may be carried. And after receiving the first notification message, the base station corresponding to the anchor cell can acquire a transmission time window for data transmission of the user equipment.

In the embodiment of the present invention, the information sent by the ue to the base station corresponding to the anchor cell may include "a covered time period (T1, T2)" selected by the ue, that is, a transmission time window selected by the ue is T1 to T2.

Therefore, the C-RNTI allocated to the user equipment is carried in the response information, so that the speed of the random access process can be increased.

The embodiment of the invention also provides another non-terrestrial wireless network cell residence method, which is described in detail by referring to fig. 3 through specific steps.

In the embodiment of the present invention, the non-terrestrial wireless network cell camping method provided in the following steps S301 to S303 may be performed by the user equipment. Specifically, the following steps S301 to S303 may be executed by a chip having a data processing function in the ue, or may be executed by a chip module including a data processing function chip in the ue.

Step S301, reporting the geographical position information to a service server.

Step S302, receiving a second notification message sent by the service server.

Step S303, a third notification message is sent to the base station corresponding to the target non-ground wireless network cell.

The following describes steps S301 to S303 in detail.

In a specific implementation, the service server may receive NTN ephemeris information provided by the wireless network element. And determining an anchor cell corresponding to the user equipment according to the geographical position information of the user equipment and the ephemeris information of the NTN cell.

The NTN ephemeris information provided by the wireless network element may include ephemeris information of all NTN satellites currently operated by the wireless network, or ephemeris information of NTN satellites obtained by the wireless network screening. The wireless network may filter out the ephemeris information of some NTN satellites related to the current service from the ephemeris information of all NTN satellites currently in operation.

In the embodiment of the present invention, a notification may also be sent to the base station by the service server to notify that the anchor cell is selected. Specifically, the service server may notify the base station of the selection of an anchor cell through a core network element (AMF).

In a specific implementation, the ue may further send a fourth notification message to the base station corresponding to the anchor cell, where the fourth notification message may carry information for indicating the transmission time window. After receiving the fourth notification message, the base station corresponding to the anchor cell may acquire a transmission time window corresponding to the user equipment.

The embodiment of the invention also provides another non-terrestrial wireless network cell residence method, which is described in detail by referring to fig. 4 through specific steps.

In the embodiment of the present invention, the method for camping on a non-terrestrial wireless network cell provided in the following steps S401 to S403 may be executed by a service server. Specifically, the following steps S401 to S403 may be executed by a chip having a data processing function in the service server, or executed by a chip module including a data processing function chip in the service server.

Step S401, acquiring the geographical position information of the user equipment and ephemeris information of the non-ground wireless network cell.

Step S402, according to the geographical position information of the user equipment and the ephemeris information of the non-ground wireless network cell, determining an anchor cell corresponding to the user equipment.

Step S403, issuing a second notification message to the ue.

The following describes steps S401 to S403 in detail.

Referring to fig. 5, a data transmission apparatus 50 according to an embodiment of the present invention is provided, including: a first determination unit 501 and a transmission unit 502, wherein:

a first determining unit 501, configured to determine an anchor cell for data transmission;

a transmitting unit 502, configured to perform data transmission through the anchor cell.

In a specific implementation, the specific execution flow of the first determining unit 501 and the transmitting unit 502 may refer to the steps S101 to S102, which is not described in detail in this embodiment of the present invention.

In a specific implementation, the data transmission apparatus 50 may correspond to a chip having a data processing function in the user equipment, such as a baseband chip; or to a chip module comprising a chip with data processing function in the user equipment, or to the user equipment.

Referring to fig. 6, a non-terrestrial wireless network cell camping apparatus 60 in the embodiment of the present invention is provided, including: a first obtaining unit 601, a first selecting unit 602, and a first sending unit 603, wherein:

a first obtaining unit 601, configured to obtain ephemeris information of a non-terrestrial wireless network cell where a user can camp;

a first selecting unit 602, configured to select a target non-terrestrial wireless network cell as an anchor cell from the camping-capable non-terrestrial wireless network cells;

a first sending unit 603, configured to send a first notification message to the base station corresponding to the anchor cell, where the first notification message is used to indicate a transmission time window for data transmission.

In a specific implementation, the specific execution flows of the first obtaining unit 601, the first selecting unit 602, and the first sending unit 603 may refer to the steps S201 to S203, which is not described in detail in this embodiment of the present invention.

In a specific implementation, the above-mentioned non-terrestrial wireless network cell residence device 60 may correspond to a chip having a data processing function in the user equipment, such as a baseband chip; or to a chip module comprising a chip with data processing function in the user equipment, or to the user equipment.

Referring to fig. 7, there is provided a non-terrestrial wireless network cell camping apparatus 70 in the embodiment of the present invention, including: a reporting unit 701, a receiving unit 702, and a second sending unit 703, wherein:

a reporting unit 701, configured to report geographical location information to a service server;

a receiving unit 702, configured to receive a second notification message sent by the service server, where the second notification message includes identification information of a target non-terrestrial wireless network cell;

a second sending unit 703 is configured to send a third notification message to a base station corresponding to the target non-ground wireless network cell, where the third notification message is used to notify the base station that the target ground wireless network cell is selected as an anchor cell.

In a specific implementation, the specific execution flows of the reporting unit 701, the receiving unit 702, and the second sending unit 703 may refer to the steps S301 to S303, which is not described in detail in this embodiment of the present invention.

In a specific implementation, the above-mentioned non-terrestrial wireless network cell residence device 70 may correspond to a chip having a data processing function in the user equipment, such as a baseband chip; or to a chip module comprising a chip with data processing function in the user equipment, or to the user equipment.

Referring to fig. 8, there is shown still another non-terrestrial wireless network cell camping apparatus 80 in an embodiment of the present invention, including: a second obtaining unit 801, a second determining unit 802, and a third sending unit 803, wherein:

a second obtaining unit 801, configured to obtain geographic location information of the user equipment and ephemeris information of a non-ground wireless network cell;

a second determining unit 802, configured to determine, according to the geographic location information of the user equipment and the ephemeris information of the non-terrestrial wireless network cell, an anchor cell corresponding to the user equipment;

a third sending unit 803, configured to issue a second notification message to the ue, where the second notification message includes the identifier information of the anchor cell.

In a specific implementation, the specific execution flows of the third obtaining unit 801, the third determining unit 802, and the third sending unit 803 may refer to the steps S401 to S403, which is not described in detail in this embodiment of the present invention.

In a specific implementation, the above-mentioned non-terrestrial wireless network cell residence device 80 may correspond to a chip having a data processing function in a service server; or the chip module with the data processing function in the service server, or the service server.

In specific implementation, regarding each module/unit included in each apparatus and product described in the foregoing embodiments, it may be a software module/unit, or may also be a hardware module/unit, or may also be a part of the software module/unit and a part of the hardware module/unit.

For example, for each device or product applied to or integrated into a chip, each module/unit included in the device or product may be implemented by hardware such as a circuit, or at least a part of the module/unit may be implemented by a software program running on a processor integrated within the chip, and the rest (if any) part of the module/unit may be implemented by hardware such as a circuit; for each device and product applied to or integrated with the chip module, each module/unit included in the device and product may be implemented by hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least part of the modules/units may be implemented by a software program running on a processor integrated inside the chip module, and the rest (if any) part of the modules/units may be implemented by hardware such as a circuit; for each device and product applied to or integrated in the terminal, each module/unit included in the device and product may be implemented by using hardware such as a circuit, and different modules/units may be located in the same component (e.g., a chip, a circuit module, etc.) or different components in the terminal, or at least part of the modules/units may be implemented by using a software program running on a processor integrated in the terminal, and the rest (if any) part of the modules/units may be implemented by using hardware such as a circuit.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructing the relevant hardware through a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of data transmission, comprising:

determining an anchor cell for data transmission;

and transmitting data through the anchor cell.

2. The data transmission method of claim 1, wherein the transmitting data via the anchor cell comprises:

determining a transmission time window for data transmission in the anchor cell;

and transmitting data through the anchor cell within the transmission time window.

3. The data transmission method of claim 2, wherein the transmitting data through the anchor cell within the transmission time window comprises:

and when the transmission times M of finishing transmitting the target data is smaller than the configured transmission times N when the end of the current transmission time window is detected, transmitting the target data for N-M times in the next transmission time window.

4. The data transmission method according to claim 3, wherein said transmitting said target data N-M times within a next transmission time window comprises:

receiving the issued indication information;

and transmitting the target data N-M times in the next transmission time window according to the indication information.

5. The data transmission method according to claim 4, wherein the delivered indication information is received at the end of the current transmission window, or the delivered indication information is received at the beginning of the next transmission time window.

6. The data transmission method according to claim 4, wherein the indication information is carried by any one of the following signaling: MAC CE, RRC message, downlink control information for uplink scheduling, and downlink control information for downlink scheduling.

7. The data transmission method according to claim 3, wherein after detecting that the number of transmission times M for completing transmission of the target data within the current transmission time window is less than the configured number of transmission times N, the method further comprises: and transmitting the target data N-M times in a next time window corresponding to the anchor cell.

8. The data transmission method according to claim 7, wherein said transmitting the target data N-M times in a next time window corresponding to the anchor cell comprises:

and in the next time window corresponding to the anchor cell, adopting the key used in the current transmission time window to carry out data transmission.

9. The data transmission method according to claim 7, wherein said transmitting the target data N-M times in a next time window corresponding to the anchor cell comprises:

and transmitting the target data for N-M times by adopting the key used by the current transmission time window in the next time window corresponding to the anchor cell, and performing new data transmission by using a new key corresponding to the next time window.

10. The data transmission method as claimed in claim 3, wherein after detecting that the number of transmission times M for completing transmission of the target data within the current transmission time window is less than the configured number of transmission times N, before the next transmission time window comes, further comprising:

and suspending counting of the timer and the counter of the MAC layer and the timer and the counter of the RLC layer.

11. The data transmission method of claim 1, wherein the determining an anchor cell for data transmission comprises:

acquiring ephemeris information of a non-ground wireless network cell which can be resided;

according to the ephemeris information, selecting the anchor cell from the non-ground wireless network cells which can be resided;

and sending a first notification message to a base station corresponding to the anchor cell, wherein the first notification message is used for indicating the transmission time window.

12. The data transmission method of claim 11, wherein after sending the first notification message to the base station corresponding to the anchor cell, further comprising:

and receiving response information sent by the base station corresponding to the anchor cell, wherein the response information corresponds to the first notification message.

13. The data transmission method according to claim 12, wherein the receiving the response information sent by the base station corresponding to the anchor cell includes:

and acquiring the cell wireless network temporary identifier distributed with the anchor cell from the response information.

14. The data transmission method of claim 11, wherein the transmission time window is a full time period or a partial time period in which the anchor cell covers itself.

15. The data transmission method of claim 1, wherein the determining an anchor cell for data transmission comprises:

reporting the geographical position information to a service server;

receiving a second notification message issued by the service server, wherein the second notification message comprises the identification information of the anchor cell;

and sending a third notification message to the base station corresponding to the anchor cell, wherein the third notification message is used for notifying the base station that the anchor cell is selected.

16. The data transmission method of claim 15, wherein the third notification message is further used to indicate a transmission period for data transmission.

17. The data transmission method of claim 15, further comprising: and sending a fourth notification message to the base station corresponding to the anchor cell, wherein the fourth notification message is used for indicating the transmission time window.

18. The data transmission method of claim 15, wherein the second notification message is generated by the service server according to the following parameters: the geographical position information and ephemeris information of the non-ground wireless network cell.

19. The data transmission method according to any one of claims 1 to 18, wherein the anchor cell is a non-terrestrial wireless network cell.

20. A non-terrestrial wireless network cell camping method, comprising:

according to the ephemeris information, selecting a target non-ground wireless network cell from the resident non-ground wireless network cells as an anchor cell;

and sending a first notification message to a base station corresponding to the anchor cell, wherein the first notification message is used for indicating a transmission time window for data transmission.

21. The non-terrestrial wireless network cell camping method of claim 20, wherein after sending a notification message to the target non-terrestrial wireless network cell, further comprising:

22. The method of claim 21, wherein the receiving the response message from the base station corresponding to the anchor cell comprises:

and acquiring the cell radio network temporary identifier corresponding to the anchor cell from the response information.

23. The non-terrestrial wireless network cell camping method of claim 20, wherein the transmission time window is a full time period or a partial time period during which the anchor cell covers itself.

24. A non-terrestrial wireless network cell camping method, comprising:

reporting the geographical position information to a service server;

receiving a second notification message issued by the service server, wherein the second notification message comprises identification information of a target non-ground wireless network cell;

and sending a third notification message to a base station corresponding to the target non-ground wireless network cell, wherein the third notification message is used for notifying the base station that the target ground wireless network cell is selected as an anchor cell.

25. The non-terrestrial wireless network cell camping method of claim 24, wherein the third notification message is further used to indicate a transmission period for data transmission.

26. The non-terrestrial wireless network cell camping method of claim 24, further comprising: and sending a fourth notification message to the base station corresponding to the anchor cell, wherein the fourth notification message is used for indicating a transmission time window for data transmission.

27. The non-terrestrial wireless network cell camping method of claim 24, wherein the second notification message is generated by the service server according to the following parameters: the geographical position information and ephemeris information of the non-ground wireless network cell.

28. A non-terrestrial wireless network cell camping method, comprising:

acquiring geographical position information of user equipment and ephemeris information of a non-ground wireless network cell;

determining an anchor cell corresponding to the user equipment according to the geographical position information of the user equipment and the ephemeris information of the non-ground wireless network cell;

and issuing a second notification message to the user equipment, wherein the second notification message comprises the identification information of the anchor cell.

29. The non-terrestrial wireless network cell-parking method of claim 28, wherein the ephemeris information for the non-terrestrial wireless network cell comprises: ephemeris information of a non-terrestrial wireless network cell related to the geographical location information of the user equipment.

30. The method as claimed in claim 28 or 29, wherein the determining an anchor cell corresponding to the ue according to the geographical location information of the ue and the ephemeris information of the non-terrestrial wireless network cell comprises:

acquiring load information corresponding to each non-ground wireless network cell;

and determining the non-ground wireless network cell with the load value smaller than the preset value as an anchor cell corresponding to the user equipment.

31. The non-terrestrial wireless network cell camping method of claim 28, wherein after determining an anchor cell corresponding to the user equipment, further comprising:

and sending the identification information of the anchor cell to a base station corresponding to the anchor cell.

32. A data transmission apparatus, comprising:

a first determining unit configured to determine an anchor cell used for data transmission;

and the transmission unit is used for carrying out data transmission through the anchor cell.

33. A non-terrestrial wireless network cell camping device, comprising:

the first acquisition unit is used for acquiring ephemeris information of a non-ground wireless network cell which can be resided;

a first selection unit, configured to select a target non-ground wireless network cell as an anchor cell from the non-ground wireless network cells that can reside according to the ephemeris information;

a first sending unit, configured to send a first notification message to a base station corresponding to the anchor cell, where the first notification message is used to indicate a transmission time window for data transmission.

34. A non-terrestrial wireless network cell camping device, comprising:

a reporting unit, configured to report the geographical location information to a service server;

a receiving unit, configured to receive a second notification message sent by the service server, where the second notification message includes identification information of a target non-terrestrial wireless network cell;

and a second sending unit, configured to send a third notification message to a base station corresponding to the target non-ground wireless network cell, where the third notification message is used to notify the base station that the target ground wireless network cell is selected as an anchor cell.

35. A non-terrestrial wireless network cell camping device, comprising:

the second acquisition unit is used for acquiring the geographical position information of the user equipment and ephemeris information of the non-ground wireless network cell;

a second determining unit, configured to determine, according to the geographical location information of the user equipment and ephemeris information of the non-terrestrial wireless network cell, an anchor cell corresponding to the user equipment;

a third sending unit, configured to issue a second notification message to the ue, where the second notification message includes the identifier information of the anchor cell.

36. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having a computer program stored thereon, wherein the computer program, when being executed by a processor, is configured to perform the steps of the data transmission method according to any one of claims 1 to 19, or the steps of the non-terrestrial wireless network cell camping method according to any one of claims 20 to 31.

37. A data transmission apparatus comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor executes the computer program to perform the steps of the data transmission method of any of claims 1 to 19.

38. A non-terrestrial wireless network cell camping device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the non-terrestrial wireless network cell camping method according to any one of claims 20-31.