WO2021142848A1

WO2021142848A1 - Pdcp reordering timer configuration method and apparatus, terminal device and network device

Info

Publication number: WO2021142848A1
Application number: PCT/CN2020/073054
Authority: WO
Inventors: 付喆
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-07-22
Also published as: CN114731285A; CN114731285B

Abstract

Disclosed are a PDCP reordering timer configuration method and apparatus, a terminal device and a network device. The method comprises: a terminal device being in communication connection with a network device, and the terminal device receiving first information sent by the network device; and adjusting a PDCP reordering timer according to the first information, such that the terminal device can flexibly adjust the duration of the PDCP reordering timer, wherein the duration refers to the maximum time for which the terminal device can wait for a PDCP PDU, that has been transmitted but has not been received correctly, after receiving a PDCP PDU. Therefore, where a downlink HARQ feedback function is disabled and ARQ retransmission is not supported, when data is transmitted between the terminal device and the network device, too early or too late packet loss of data can be prevented, thereby improving the experience of service data transmission of the terminal device.

Description

PDCP reordering timer configuration method, device, terminal equipment and network equipment

Technical field

This application relates to the field of communication technologies, and in particular to a method, device, terminal equipment, and network equipment for configuring a PDCP reordering timer.

Background technique

Currently, the 3rd Generation Partnership Project (3GPP) is studying Non-Terrestrial Network (NTN) technology. NTN generally uses satellite communications to provide communications services to ground users. Compared with terrestrial cellular network communication, satellite communication has many unique advantages. First of all, satellite communication is not restricted by the user's area, and secondly, satellite communication covers a wide range. Satellite communications can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions. Once again, satellite communications are far away, and communications costs have not increased significantly. Finally, satellite communications are highly stable. Not subject to natural disasters. Communication satellites are classified into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, and highly elliptical orbits. (High Elliptical Orbit, HEO) satellites and so on. The main research at this stage is LEO and GEO.

In the NTN system, especially in the non-GEO scenario, the wireless signal transmission delay between the terminal equipment and the satellite has a rapidly changing characteristic. In the 5th generation mobile networks (5G), New Radio (NR) has a two-level retransmission mechanism: a hybrid automatic repeat request (MAC) layer at the Medium Access Control (MAC) layer. Hybrid Automatic Repeat Req terminal equipment st, HARQ) mechanism and Radio Link Control (Radio Link Control, RLC) layer automatic repeat request (Automatic Repeat Req terminal equipment st, ARQ) mechanism.

At present, in NR, the parameters of the PDCP reordering timer on the terminal device side reflect that the terminal device receives a Packet Data Convergence Protocol (PDCP) protocol data unit (Protocol Data Unit, PDU). The maximum time that PDCP PDUs that have been transmitted but not received correctly can wait. In NR, this kind of PDCP PDUs arriving at the receiving end out of order is mainly caused by the HARQ transmission mechanism and RLC ARQ mechanism of the MAC layer. For example, two PDCP PDUs are transmitted successively, and the first transmitted PDCP PDU 1 is experiencing Only after HARQ retransmission and/or ARQ retransmission is received by the receiving end, the PDCP PDU transmitted later is correctly received by the receiving end after one initial transmission in the MAC, and the terminal device may receive the PDCP PDU first. At this time, the terminal device will start the PDCP reordering timer, and wait to receive PDCP PDU 1 within the running time of the timer.

Compared with the cellular network used in traditional NR, the signal propagation delay between the terminal equipment and the satellite in NTN has increased significantly, and the HARQ feedback function needs to be turned off to reduce the data transmission delay. When the HARQ feedback function is turned off, if the network device does not support blind scheduling at the same time (without configuration), that is, each MAC PDU has only one transmission opportunity at the MAC layer. Since there is no MAC retransmission, if the radio bearer corresponds to the RLC entity at the same time ARQ function is also not supported. In non-GEO scenarios, due to the constantly changing delay between terminal equipment and network equipment, if the PDCP reordering timer is statically configured according to the existing mechanism, it cannot be well adapted to terminal equipment and network equipment. The constant change of the delay between the two will cause PDCP packet loss too early or too late.

Summary of the invention

The embodiments of the present application provide a PDCP reordering timer configuration method, device, terminal device, and network device, which can avoid packet loss when transmitting data in the terminal device and the network device too early or too late.

In the first aspect, an embodiment of the present application provides a PDCP reordering timer configuration method, which is applied to a terminal device, and the method includes:

Receiving the first information sent by the network device;

Adjusting the PDCP reordering timer according to the first information.

In the second aspect, an embodiment of the present application provides a PDCP reordering timer configuration method, which is applied to a network device, and the method includes:

Send first information to the terminal device, where the first information is used by the terminal device to adjust the PDCP reordering timer.

In a third aspect, an embodiment of the present application provides a device for configuring a PDCP reordering timer, which is applied to a terminal device. The device includes a receiving unit and an adjusting unit, wherein:

The receiving unit is configured to receive first information sent by a network device;

The adjustment unit is configured to adjust the PDCP reordering timer according to the first information.

In a fourth aspect, an embodiment of the present application provides a PDCP reordering timer configuration device, which is applied to a network device, and the device includes a sending unit, wherein:

The sending unit is configured to send first information to a terminal device, where the first information is used to adjust the PDCP reordering timer by the terminal device.

In a fifth aspect, embodiments of the present application provide a terminal device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured by The processor executes, and the program includes instructions for executing the steps in any method in the first aspect of the embodiments of the present application.

In a sixth aspect, an embodiment of the present application provides a network device, including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and are configured by The processor executes, and the program includes instructions for executing the steps in any method in the second aspect of the embodiments of the present application.

In a seventh aspect, an embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that the device installed with the chip executes the first aspect or the second aspect of the embodiment of the present application. Some or all of the steps described in any method of the aspect.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the For example, part or all of the steps described in any method of the first aspect or the second aspect.

In a ninth aspect, an embodiment of the present application provides a computer program, wherein the computer program is operable to cause a computer to execute part or all of the steps described in any method of the first aspect or the second aspect of the embodiment of the present application . The computer program may be a software installation package.

It can be seen that in this embodiment of the application, the terminal device is in communication connection with the network device, and the terminal device receives the first information sent by the network device; the PDCP reordering timer is adjusted according to the first information, so that the terminal device can flexibly adjust the PDCP reordering The duration of the timer refers to the maximum time that a terminal device can wait for a PDCP PDU that has been transmitted but has not been received correctly after receiving a PDCP PDU. Therefore, when the downlink HARQ feedback function is turned off and the ARQ replay is not supported In the case of data transmission, when data is transmitted between the terminal device and the network device, it can avoid data packet loss too early or too late, and improve the terminal device's experience of transmitting service data.

Description of the drawings

The following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art.

FIG. 1A is an example diagram of a communication system with a 5G SA networking architecture provided by an embodiment of the present invention;

FIG. 1B is an example diagram of a communication system with a 5G NSA networking architecture provided by an embodiment of the present invention;

2A is a schematic flowchart of a method for configuring a PDCP reordering timer according to an embodiment of the present application;

2B is a schematic diagram of a demonstration of increased signal transmission time delay between a terminal device and a satellite according to an embodiment of the present application;

FIG. 2C is a schematic diagram of a demonstration that a signal transmission delay between a terminal device and a satellite is reduced according to an embodiment of the present application;

FIG. 2D is a schematic diagram of a demonstration of a signal transmission delay between a terminal device and a satellite first becoming smaller and then becoming larger according to an embodiment of the present application;

2E is a schematic diagram of a demonstration of configuring a PDCP reordering timer according to an embodiment of the present application;

FIG. 2F is a schematic diagram illustrating another configuration of a PDCP reordering timer provided by an embodiment of the present application; FIG.

FIG. 2G is a schematic diagram illustrating another configuration of a PDCP reordering timer provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a network device provided by an embodiment of the present application;

5 is a block diagram of functional units of a PDCP reordering timer configuration device provided by an embodiment of the present application;

FIG. 6 is a block diagram of the functional unit composition of another PDCP reordering timer configuration device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings.

In the 5th generation mobile networks (5G) New Radio (NR) system, the retransmission of lost or erroneous data is mainly handled by the HARQ mechanism of the MAC layer, and is handled by the RLC layer. Retransmission function is supplemented. The HARQ mechanism of the MAC layer can provide fast retransmission, and the ARQ mechanism of the RLC layer can provide reliable data transmission.

HARQ uses Stop-and-Wait Protocol to send data. In the stop-and-wait protocol, after the sender sends a Transport Block (TB), it stops and waits for the confirmation message. In this way, the sender will stop and wait for confirmation after each transmission, which will result in very low user throughput. Therefore, NR uses multiple parallel HARQ processes. When one HARQ process is waiting for confirmation information, the sender can use another HARQ process to continue sending data. These HARQ processes together form a HARQ entity, which combines the stop-and-wait protocol to allow continuous data transmission. HARQ is divided into uplink HARQ and downlink HARQ. Uplink HARQ is for uplink data transmission, and downlink HARQ is for downlink data transmission. The two are independent of each other.

Based on the current NR protocol, the terminal equipment has its own HARQ entity corresponding to each serving cell. Each HARQ entity maintains a set of parallel downlink HARQ processes and a set of parallel uplink HARQ processes. At present, each uplink and downlink carrier supports a maximum of 16 HARQ processes. The network device (for example, the base station) can indicate the maximum number of HARQ processes to the terminal device through RRC signaling semi-static configuration according to the network deployment situation. If the network does not provide corresponding configuration parameters, the default number of HARQ processes in the downlink is 8, and the maximum number of HARQ processes supported by each carrier in the uplink is always 16. Each HARQ process corresponds to a HARQ process ID. For the downlink, BCCH uses a dedicated broadcast HARQ process. For terminal equipment that does not support downlink space division multiplexing, each downlink HARQ process can only process 1 TB at the same time; for terminal equipment that supports downlink space division multiplexing, each downlink HARQ process can process 1 or 2 TB at the same time . Each uplink HARQ process of the terminal equipment handles 1 TB at the same time. HARQ is divided into two types, synchronous and asynchronous in the time domain, and divided into two types, non-adaptive and adaptive in the frequency domain. Both NR uplink and downlink use asynchronous adaptive HARQ mechanism. Asynchronous HARQ, that is, retransmission can occur at any time, and the time interval between the retransmission of the same TB and the previous transmission is not fixed. Adaptive HARQ can change the frequency domain resources and MCS used for retransmission.

Each logical channel of the terminal equipment has an RLC entity. An RLC entity can be configured in one of three modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). Among them, only the AM mode can support error detection and ARQ retransmission. On the network equipment side or the terminal equipment side, an AM entity includes both a receiving side and a transmitting side, that is, it can send and receive data at the same time. The AM entity provides two-way data transmission services. The AM entity sends/receives 2 types of PDUs, namely RLC data PDU and RLC control PDU. Among them, the RLC data PDU is used to transmit data, and the RLC control PDU is used to transmit status reports. For AM RLC entities, by detecting the Secondary Node (SN) of the received RLC data PDU, the receiving end can know which PDUs (or segments thereof) have been lost, and request the sending end to retransmit the lost PDU (or its segment). Subsection). The receiving end will tell the sending end which Acknowledged Mode Data (AMD) PDUs have been successfully received through the sending status report, and which AMD PDUs or segments have not been successfully received. After receiving the status report, the sender will initiate an ARQ retransmission.

The PDCP layer provides transmission services for the radio bearers mapped to the Downlink Control Channel (DCCH) and Dedicated Transmission Channel (Dedicated Transmission CHannel) DTCH logical channels. Each radio bearer corresponds to one PDCP layer entity, and each PDCP layer corresponds to 1, 2, or 4 RLC entities (determined according to one-way transmission/two-way transmission, bearer division/non-division, RLC mode, etc.). If the bearer is not divided, one PDCP entity corresponds to one UM RLC (one-way), or two UM RLC entities (one for each two-way), or one AM RLC entity. If the bearer is split, one PDCP entity corresponds to 2 UM RLC (one-way), or 4 UM RLC entities (one for each two-way), or 2 AM RLC entities.

The NR PDCP layer supports reordering and in-order delivery functions. The receiver of the PDCP entity has a PDCP PDU buffer, which is used for reordering the PDCP PDU to ensure that it is delivered to the upper layer in order. If the network is configured with a radio bearer that does not need to be delivered in order, then this buffer does not exist, and the PDCP receiver processes the received PDCP PDU and delivers it directly to the upper layer. In order to support the reordering and in-order delivery of PDCP reception by terminal equipment, the network RRC configures a PDCP reordering timer for the PDCP receiver of the terminal equipment, and the PDCP reordering timer is used to control the terminal equipment side to wait for the previously unreceived PDCP PDU time. If a PDCP PDU is received from the PDCP layer, and at least one PDCP PDU before the PDCP PDU has not been received, and the PDCP reordering timer is not currently running, the PDCP reordering timer is started. These previous unreceived PDCP PDUs need to be received in order before the PDCP reordering timer expires. Otherwise, after the PDCP reordering timer expires, the received PDCP PDUs will be forcibly delivered to the upper layer. The received PDCP PDUs are discarded.

At present, in NR, after receiving a PDCP PDU, the terminal device needs to wait for the PDCP PDU that has been transmitted but has not been received correctly. In NR, the disorder of PDCP PDU arriving at the receiving end is mainly due to the HARQ of the MAC layer. Transmission mechanism and RLC ARQ mechanism. For example, two PDCP PDUs are transmitted one after another. The first PDCP PDU 1 is received by the receiving end after HARQ retransmission and/or ARQ retransmission, and then the PDCP PDU transmitted later 2 After the MAC has undergone one initial transmission, it is correctly received by the receiving end, and the terminal device may first receive the PDCP PDU 2. At this time, the terminal device will start the PDCP reordering timer and wait for reception within the running time of the timer PDCP PDU 1.

Compared with the cellular network used in traditional NR, the signal propagation delay between the terminal equipment and the satellite in NTN is greatly increased. It is necessary to turn off the HARQ feedback function to reduce the data transmission delay. When the HARQ feedback function is turned off, if the base station is at the same time Blind scheduling is not supported (without configuration), that is, each MACPDU has only one transmission opportunity at the MAC layer. Since there is no MAC retransmission, if the RLC entity corresponding to the radio bearer does not support the ARQ function at the same time, for the GEO scenario, due to the terminal equipment The delay between the terminal device and the network device is basically unchanged or changes very slowly. At this time, the PDCP reordering timer can be configured to have a duration of 0; for non-GEO scenarios, due to the continuous change of the delay between the terminal device and the network device, If the PDCP reordering timer is statically configured according to the existing mechanism, it will not be able to adapt to the constant changes in the delay between the terminal device and the network, and it will cause PDCP packet loss too early or too late, which will affect the user's service experience .

In response to the above problems, an embodiment of the application proposes a PDCP reordering timer configuration method, which is applied to a 5G NR networking architecture. The networking architecture can be a communication network that is not an independent NSA networking as shown in Figure 1A, or it can be It is an independent communication network as shown in FIG. 1B, and the embodiment of the present application does not make a unique limitation. In addition, the terminal devices described in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices (such as smart watches, smart bracelets, pedometers, etc.), computing devices or connected to wireless Other processing equipment of the modem, as well as various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), and so on. For ease of description, the devices mentioned above are collectively referred to as terminal devices. The network equipment described in the embodiment of the present application includes a base station or a core network equipment.

Please refer to FIG. 2A. FIG. 2A is a PDCP reordering timer configuration method provided by an embodiment of the present application, which is applied to a 5G SA or NSA networking system, and the method includes:

Step 201: The network device sends the first information to the terminal device.

Wherein, when the downlink HARQ feedback function is turned off and ARQ retransmission is not supported, the network device may send the first information to the terminal device. The first information is used to indicate that the terminal device adjusts the duration of the PDCP reordering timer.

The first information may include at least one of the following: the first initial duration of the PDCP reordering timer, the first adjustment period and the first adjustment step, the first duration, and the maximum duration. Among them, the first initial duration refers to the initial duration of the PDCP reordering timer indicated by the network device for the terminal device, and is used to update the duration of the PDCP reordering timer; the first adjustment period refers to the new PDCP reordering timer. The adjustment period of is used to update the adjustment period of the PDCP reordering timer; the first adjustment step refers to the new adjustment step of the PDCP reordering timer indicated by the network device for the terminal device, which is used to reorder the PDCP The duration of the timer is adjusted periodically; the first duration is the duration of the PDCP reordering timer indicated by the network device for the terminal device, and is used to update the duration of the PDCP reordering timer; the maximum duration means that the network device is a terminal device The maximum length of the PDCP reordering timer that can be configured.

Step 202: The terminal device adjusts the PDCP reordering timer according to the first information.

In a specific implementation, the adjustment of the duration of the PDCP reordering timer may be controlled by the network, or may be independently adjusted by the terminal device. Different first information corresponds to different ways of adjusting the PDCP reordering timer.

Wherein, if the first information includes the first initial duration, the first adjustment period, or the first adjustment step, the adjustment of the duration of the PDCP reordering timer is controlled by the network. Specifically, the network device sends the first initial duration, In the first adjustment period or the first adjustment step, the terminal device updates the length of the PDCP reordering timer according to the first initial time length, and performs the period of the PDCP reordering timer according to the first adjustment period or the first adjustment step. Sexual adjustment.

Wherein, if the first information includes the first duration, the adjustment of the duration of the PDCP reordering timer is controlled by the network. Specifically, the network device sends the first duration to the terminal device, and the terminal device adjusts the PDCP reordering timer according to the first duration. The duration is updated.

Wherein, if the first information includes the maximum duration, the duration of the PDCP reordering timer is independently adjusted by the terminal device. Specifically, the network device sends the maximum duration to the terminal device, and the terminal device determines the duration of the PDCP reordering timer by itself according to the maximum duration.

In a possible example, before the step 201, the network device sends the first information to the terminal device, the method may further include the following steps:

The network device sends the second initial duration to the terminal device;

The terminal device configures the PDCP reordering timer according to the second initial duration.

Among them, the network device can send RRC signaling to the terminal device. The RRC signaling carries network RCC configuration information. The terminal device assigns each radio bearer (except Signaling Radio Bearer (SRB) 0) according to the network RCC configuration information. One PDCP entity is configured to obtain at least one PDCP entity, and the network RCC configuration information may include the second initial duration corresponding to the PDCP reordering timer, that is, the initial value of the PDCP reordering timer duration.

Optionally, the second initial duration is the signal transmission delay between the ground location farthest from the satellite and the network device in the coverage area corresponding to the cell where the terminal device is located.

In specific implementation, if the network device does not obtain the location information of the terminal device, the signal transmission delay between the ground location farthest from the satellite and the network device in the coverage area corresponding to the cell where the terminal device is located may be used as the second initial duration.

Optionally, the second initial duration is determined by the network device according to the first position of the terminal device and the motion parameters of the satellite, and the first position is the time when the network device sends the terminal device to the terminal device. The location of the terminal device when the second initial duration is sent.

Wherein, the aforementioned motion parameters may include at least one of the following: the motion trajectory, motion speed, and motion direction of the satellite.

In specific implementation, if the network device obtains the first position of the terminal device, the second initial duration may be determined according to the first position of the terminal device and the motion parameters of the satellite.

Optionally, the method further includes:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal transmission time The extension becomes larger, and it is determined that the second initial duration is zero.

In this possible example, the network device can determine the signal transmission delay change information between the terminal device and the network device according to the first position of the terminal device and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2B and Figure 2B. A schematic diagram of a demonstration of increased signal transmission delay between a terminal device and a satellite provided in an embodiment of this application, in which the satellite orbits the earth, and the time is from t1 to t2, and then to t3, the signal transmission delay change information It is used to indicate that the signal transmission delay becomes longer, and the network device can determine that the second initial duration is 0.

Optionally, the method further includes:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal The transmission delay becomes smaller, and the third difference between the first maximum delay of signal transmission between the network device and the terminal device and the current delay of signal transmission between the satellite and the terminal device is determined; if said If the third difference is greater than or equal to the maximum duration set by the network device, the maximum duration is taken as the second initial duration; if the third difference is less than the maximum duration, the third difference is taken as the The second initial duration.

In this possible example, the network device can determine the signal transmission delay change information between the terminal device and the network device according to the first position of the terminal device and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2C and Figure 2C. A schematic diagram of a demonstration of reducing the signal transmission delay between a terminal device and a satellite provided in an embodiment of this application, in which the satellite orbits the earth, and the time is from t1 to t2, and then to t3, and the signal transmission delay change information It is used to indicate that the signal transmission delay becomes smaller, and the network device can determine the second initial duration according to the following formula:

Ti1=min{(max_delay-current_delay), TR _m },

Among them, Ti1 is the second initial duration; max_delay is the first maximum delay of signal transmission between the network device and the terminal device while the current satellite provides service for the terminal device. For example, assume that the current satellite provides service for the terminal device. t1 to t3, the first maximum delay is the maximum delay of signal transmission between the network device and the terminal device between t1 and t3; current_delay is the current delay of signal transmission between the satellite and the terminal device, which can be based on the satellite’s The motion parameters and the first position of the terminal device are determined.

Optionally, the method further includes:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal If the transmission delay first becomes smaller and then becomes larger, or becomes larger and then smaller, it is determined that the second largest delay of signal transmission between the network device and the terminal device that the terminal device has experienced and the satellite and the terminal The fourth difference between the current delays of signal transmission between devices; if the fourth difference is greater than or equal to the maximum duration set by the network device, use the maximum duration as the second initial duration; if said The fourth difference is less than the maximum duration, and the fourth difference is used as the second initial duration.

In this possible example, the network device can determine the signal transmission delay change information between the terminal device and the network device according to the first position of the terminal device and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2D and Figure 2D. This embodiment of the application provides a schematic diagram of the signal transmission delay between the terminal equipment and the satellite first becoming smaller and then becoming larger, in which the satellite orbits the earth, the time is from t1 to t2, and the signal transmission delay change information It is used to indicate that the signal transmission delay becomes smaller, and the time is from t2 to t3. The signal transmission delay change information is used to indicate that the signal transmission delay becomes larger. The network device can determine the second initial duration according to the following formula:

Ti1=min{(current_max_delay-current_delay), TR _m} ,

Among them, Ti1 is the second initial duration; current_max_delay is the second maximum delay of signal transmission between the network device and the terminal device that the terminal device has experienced while the current satellite is serving the terminal device. For example, assume that the current satellite is the terminal device. The time for the equipment to provide services is from t1 to t3, the time for signal transmission between the network device and the terminal device that the terminal device has experienced is from t1 to t2, and the second maximum delay is between the network device and the terminal device from t1 to t2 The maximum delay of signal transmission between the satellites; current_delay is the current delay of signal transmission between the satellite and the terminal device, which can be determined according to the motion parameters of the satellite and the first position of the terminal device.

The network device sends the second adjustment period and the second adjustment step to the terminal device;

The terminal device periodically adjusts the duration of the PDCP reordering timer according to the second adjustment period and the second adjustment step.

Wherein, the second adjustment period and the second adjustment step length may be sent to the terminal device by the network device through RRC signaling together with the second initial time length.

In specific implementation, the network device may determine the second adjustment period and the second adjustment step size according to the relative movement speed between the satellite and the terminal device.

In a possible example, the first information includes a first initial duration, a first adjustment period, and a first adjustment step. In step 202, the PDCP reordering timer is adjusted according to the first information. It includes the following steps:

Update the duration of the PDCP reordering timer according to the first initial duration;

Periodically adjust the duration of the PDCP reordering timer according to the first adjustment period and the first adjustment step.

In specific implementation, the network device sends the second initial duration and the second adjustment period to the terminal device. After the second adjustment step, the terminal device configures the PDCP reordering timer to the second initial duration, according to the second adjustment period and the second adjustment period. The adjustment step length periodically adjusts the duration of the PDCP reordering timer. As the satellite orbits the earth, the signal delay between the network device and the terminal device may change. Therefore, the network device can send the first initial duration, the first adjustment period, and the first adjustment step to the terminal device, The terminal device updates the duration of the PDCP reordering timer according to the first initial duration, uses the first initial duration as the new initial value of the PDCP reordering timer duration, and uses the first adjustment period and the first adjustment step Periodically adjust the duration of the PDCP reordering timer. Therefore, the duration of the PDCP reordering timer can be dynamically adjusted.

In this possible example, the method further includes:

The network device receives the second position reported by the terminal device, and determines the first initial duration, the first adjustment period, and the first adjustment step according to the second position.

Wherein, the first information may be sent to the terminal device through RRC signaling or a media access control MAC control element (ControlElement) CE. Specifically, the network device may send the first initial duration, the first adjustment period, and the first adjustment step to the terminal device through RRC signaling, or the network device may send the first initial duration, the first adjustment period and the first adjustment period to the terminal device through MAC CE. The first adjustment step is sent to the terminal device.

In specific implementation, the network device can obtain the second position of the terminal device by itself, or receive the second position reported by the terminal device, and then determine the first initial duration, the first adjustment period, and the first adjustment step according to the second position. The manner of determining the first initial duration according to the second position may refer to the manner in which the device determines the second initial duration according to the first position of the terminal device and the motion parameters of the satellite, which will not be repeated here. The network device may determine the first adjustment period and the first adjustment step according to the relative movement speed between the satellite and the terminal device when the terminal device is in the second position.

For example, please refer to Figure 2E. Figure 2E is a schematic diagram of a PDCP reordering timer configuration provided by an embodiment of this application. In the case that the downlink HARQ feedback function is disabled and ARQ retransmission is not supported, the network device can Send RRC signaling to the terminal device. The RRC signaling includes a second initial duration Ti1, a second adjustment period T1, and a second adjustment step △1. The terminal device configures the PDCP reordering timer to be TR0 = the second initial duration Ti1. The terminal device periodically adjusts the duration of the PDC P reordering timer with the second adjustment period T1 and the second adjustment step △1. After T1, the terminal device adjusts the duration of the PDCP reordering timer to TR1=TR0+△ 1. If the terminal device starts the PDCP reordering timer, at this time, the duration of the PDCP reordering timer is TR1. When the network device indicates the first initial duration Ti2, the first adjustment period T2, and the first adjustment step △2 to the terminal device through RRC signaling or MAC CE, the duration of the PDCP reordering timer is adjusted to TR2=Ti2, if the terminal The device starts the PDCP reordering timer. At this time, the duration of the PDCP reordering timer is TR2. The terminal device periodically adjusts the length of the PDCP reordering timer with the first adjustment period T2 and the first adjustment step △2. After T2, the terminal device adjusts the length of the PDCP reordering timer to TR3=TR2+△2 If the terminal device restarts the PDCP reordering timer, at this time, the duration of the PDCP reordering timer is TR3. After T2, the terminal device adjusts the duration of the PDCP reordering timer to TR4=TR3+△2.

It can be seen that the network device can indicate the first initial duration, the first adjustment period, and the first adjustment step to the terminal device through RRC signaling or MAC CE, and the terminal device is based on the first initial duration, first adjustment period, and first adjustment step. Adjust the length of the PDCP reordering timer, so that when the signal transmission delay between the terminal device and the network device changes, the terminal device can more accurately determine the length of the PDCP reordering timer to avoid data premature or Lost packets too late.

In a possible example, the first information includes the first duration. In step 202, the terminal device adjusting the PDCP reordering timer according to the first information may include the following steps:

The duration of the PDCP reordering timer is updated according to the first duration.

In specific implementation, after the network device sends the second initial duration to the terminal device, the terminal device configures the initial value of the PDCP reordering timer to the second initial duration. As the satellite orbits the earth, the network device and the terminal The signal delay between devices may change. Therefore, the network device can send the first duration to the terminal device, and the terminal device updates the duration of the PDCP reordering timer according to the first duration, so that the PDCP can be dynamically adjusted The duration of the reordering timer is adjusted.

Wherein, the first information may be sent to the terminal device through physical downlink control channel PDCCH indication signaling. Specifically, in dynamically scheduled downlink transmission, the network device may send the first duration to the terminal device through PDCCH indication signaling.

Optionally, the network device may also send the first duration to the terminal device through the MAC CE. Specifically, in dynamically scheduled downlink transmission or in downlink transmission with pre-configured resources, the network device may send the first duration to the terminal device through the MAC CE.

Among them, if the network device determines that the first duration has not changed from the duration of the PDCP reordering timer indicated during the last downlink transmission, the network device may not carry the duration of the PDCP reordering timer of the terminal device in this downlink transmission. Instruct, that is, not to send the first duration to the terminal device.

Among them, if this downlink MAC transmission corresponds to the downlink transmission of multiple logical channels, since each logical channel configured with a PDCP reordering timer corresponds to a PDCP reordering timer, it can be used in the PDCCH or MAC CE for each Each logical channel configured with PDCP reordering timers respectively indicate the first duration of a PDCP reordering timer, that is, sending for each PDCP reordering timer of multiple PDCP reordering timers corresponding to multiple logical channels A first duration.

For example, please refer to FIG. 2F. FIG. 2F is another schematic diagram of a PDCP reordering timer configuration provided by an embodiment of this application. When the downlink HARQ feedback function is disabled and ARQ retransmission is not supported, the network device The RRC signaling may be sent to the terminal device. The RRC signaling includes the second initial duration Ti1, and the terminal device configures the duration of the PDCP reordering timer as TR0=the second initial duration Ti1. After the network device indicates the first duration TR1 to the terminal device through the PDCCH indication signaling, the terminal device adjusts the duration of the PDCP reordering timer to TR1. If the terminal device starts the PDCP reordering timer, at this time, the PDCP reordering timer The duration is TR1. The network device indicates the first duration TR2 to the terminal device through the PDCCH indication signaling, and the terminal device adjusts the duration of the PDCP reordering timer to TR2. If the network device indicates downlink scheduling to the terminal device through PDCCH indication signaling, but does not indicate the first duration, the duration of the PDCP reordering timer remains unchanged. If the terminal device starts the PDCP reordering timer, at this time, the PDCP reordering timer The duration is TR2. The network device indicates the first duration TR3 to the terminal device through the PDCCH indication signaling, and the terminal device adjusts the duration of the PDCP reordering timer to TR3. If the terminal device restarts the PDCP reordering timer, at this time, the duration of the PDCP reordering timer is TR3.

It can be seen that the network device can indicate the first duration to the terminal device through the PDCCH indication signaling, and the terminal device adjusts the duration of the PDCP reordering timer according to the first duration, so that when the terminal device and the network device are transmitting signals When the delay changes, the terminal device can more accurately determine the duration of the PDCP reordering timer, so as to avoid data packet loss too early or too late.

In a possible example, the first information includes the maximum duration of the PDCP reordering timer, and the maximum duration is determined by the network device according to the QoS delay of the radio bearer.

Wherein, the first information is sent by the network device to the terminal device through RRC signaling. Specifically, the network device may send the maximum duration to the terminal device through RRC signaling.

In this possible example, in step 202, the terminal device adjusting the PDCP reordering timer according to the first information may include the following steps:

When it is determined that the first information includes the maximum duration, the duration of the PDCP reordering timer is adjusted according to the current position of the terminal device and the motion parameters of the satellite.

In specific implementation, after the network device sends the maximum duration of the PDCP reordering timer to the terminal device, the terminal device can determine the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite. As the satellite orbits the earth, the relative position between the satellite and the terminal device will change, resulting in a possible change in the signal delay between the network device and the terminal device. Therefore, the terminal device can continuously determine the current status of the terminal device. The position and the motion parameters of the satellite update the duration of the PDCP reordering timer according to the current position of the terminal device and the position of the motion parameter of the satellite, so that the duration of the PDCP reordering timer can be dynamically adjusted.

Optionally, the adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite includes:

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay becomes larger , It is determined that the duration of the PDCP reordering timer is 0.

In this possible example, the terminal device can determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2B. Figure 2B is an implementation of this application. The example provides a schematic diagram showing the increase of the signal transmission delay between the terminal equipment and the satellite, in which the satellite orbits the earth, the time is from t1 to t2, and then to t3, and the signal transmission delay change information is used to indicate the signal As the transmission delay becomes longer, the network device can determine that the duration of the PDCP reordering timer is zero.

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay becomes smaller , Determining the first difference between the first maximum delay of signal transmission between the network device and the terminal device and the current delay of signal transmission between the satellite and the terminal device; if the first difference is greater than Or equal to the maximum duration, update the duration of the PDCP reordering timer according to the maximum duration, and if the first difference is less than the maximum duration, update the PDCP reordering timing according to the first difference The duration of the device.

In this possible example, the terminal device can determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2C. Figure 2C is an implementation of this application. The example provides a schematic diagram showing the reduction of signal transmission delay between terminal equipment and satellite, where the satellite orbits the earth, the time is from t1 to t2, and then to t3, and the signal transmission delay change information is used to indicate the signal As the transmission delay becomes smaller, the network device can determine the length of the PDCP reordering timer according to the following formula:

t-Reordering=min{(max_delay-current_delay), TR _m },

Among them, t-Reordering is the duration of the PDCP reordering timer; max_delay is the first maximum delay of signal transmission between the network device and the terminal device during the period when the current satellite is serving the terminal device. For example, assume that the current satellite is the terminal device The service time is from t1 to t3, and the first maximum delay is the maximum delay of signal transmission between the network device and the terminal device between t1 and t3; current_delay is the current delay of signal transmission between the satellite and the terminal device , Can be determined according to the satellite's motion parameters and the first position of the terminal device; TR _m is the maximum duration of the PDCP reordering timer sent by the network device to the terminal device.

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay changes first The second largest delay of signal transmission between the network device and the terminal device and the signal transmission between the satellite and the terminal device that have been experienced by the terminal device and the signal transmission between the satellite and the terminal device are determined If the second difference is greater than or equal to the maximum duration, update the duration of the PDCP reordering timer according to the maximum duration, if the second difference If it is less than the maximum duration, the duration of the PDCP reordering timer is updated according to the second difference.

In this possible example, the terminal device can determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite's motion trajectory and motion speed. Please refer to Figure 2D. Figure 2D is an implementation of this application. The example provides a demonstration diagram showing the signal transmission delay between the terminal equipment and the satellite first becomes smaller and then becomes larger, in which the satellite orbits the earth and the time is from t1 to t2, and the signal transmission delay change information is used to indicate the signal The transmission delay becomes smaller, and the time is from t2 to t3. The signal transmission delay change information is used to indicate that the signal transmission delay becomes larger. The network device can determine the length of the PDCP reordering timer according to the following formula:

t-Reordering=min{(current_max_delay-current_delay), TR _m },

Among them, t-Reordering is the duration of the PDCP reordering timer; current_max_delay is the second maximum delay of signal transmission between the network device and the terminal device that the terminal device has experienced during the period when the current satellite is serving the terminal device, for example, Assuming that the current satellite service time for the terminal equipment is from t1 to t3, the signal transmission time between the network equipment and the terminal equipment that the terminal equipment has experienced is from t1 to t2, and the second maximum delay is the network equipment between t1 and t2 The maximum delay of signal transmission between the satellite and the terminal device; current_delay is the current delay of signal transmission between the satellite and the terminal device, which can be determined according to the motion parameters of the satellite and the current position of the terminal device.

For example, please refer to Figure 2G. Figure 2G is another schematic diagram of a PDCP reordering timer configuration provided by an embodiment of this application. In the case where the downlink HARQ feedback function is disabled and ARQ retransmission is not supported, the network device RRC signaling can be sent to the terminal equipment. The RRC signaling includes the maximum duration TR _m , the terminal equipment is in the initial position A0, the satellite motion parameter at that time is Pr0, and the terminal equipment autonomously sets the PDCP reordering timer duration to TR0. The terminal device obtains the current position of the terminal device as A1, the motion parameter of the satellite is Pr1, and the terminal device independently sets the PDCP reordering timer to TR1. If the terminal device starts the PDCP reordering timer, at this time, the PDCP reordering timer The duration is TR1. The terminal device acquires the current position of the terminal device as A2, the motion parameter of the satellite is Pr2, and the terminal device independently sets the PDCP reordering timer to TR2. If the terminal device restarts the PDCP reordering timer, at this time, the PDCP reordering timer The duration is TR2.

It can be seen that the network device can indicate the maximum duration to the terminal device through RRC signaling, and the terminal device autonomously adjusts the duration of the PDCP reordering timer according to the satellite's motion parameters and the current position of the terminal device, so that when the terminal device and the network When the signal transmission delay between devices changes, the terminal device can more accurately determine the duration of the PDCP reordering timer, and avoid data packet loss too early or too late.

Consistent with the embodiment shown in FIG. 2A, please refer to FIG. 3. FIG. 3 is a schematic structural diagram of a terminal device 300 provided by an embodiment of the present application. As shown in the figure, the terminal device 300 includes a processor 310, The memory 320, the communication interface 330, and one or more programs 321, wherein the one or more programs 321 are stored in the above-mentioned memory 320 and are configured to be executed by the above-mentioned processor 310, and the one or more programs 321 Include instructions for performing the following operations.

Receiving the first information sent by the network device;

Adjusting the PDCP reordering timer according to the first information.

It can be seen that in this embodiment of the application, if the terminal device receives the first information sent by the network device, the terminal device adjusts the PDCP reorder timer according to the first information. In this way, the terminal device can flexibly adjust the PDCP reorder timer The duration refers to the maximum time that a terminal device can wait for a PDCP PDU that has been transmitted but has not been received correctly after receiving a PDCP PDU. Therefore, when the downlink HARQ feedback function is disabled and ARQ retransmission is not supported In this case, when data is transmitted between the terminal device and the network device, it can avoid data packet loss too early or too late, and improve the terminal device's experience of transmitting service data.

In a possible example, the first information includes a first initial duration, a first adjustment period, and a first adjustment step. In terms of adjusting the PDCP reordering timer according to the first information, the The one or more programs 321 include instructions for performing the following operations:

In a possible example, the one or more programs 321 further include instructions for performing the following operations:

Reporting the second location of the terminal device to the network device, where the second location is used by the network device to determine the first initial duration, the first adjustment period, and the first adjustment step.

In a possible example, the first information includes a first duration, and in the aspect of adjusting the PDCP reordering timer according to the first information, the one or more programs 321 include methods for performing the following operations The instructions:

In a possible example, before the receiving the first information sent by the network device, the one or more programs 321 further include instructions for performing the following operations:

Receiving the second initial duration sent by the network device;

The PDCP reordering timer is configured according to the second initial duration.

Receiving the second adjustment period and the second adjustment step size sent by the network device;

Periodically adjust the duration of the PDCP reordering timer according to the second adjustment period and the second adjustment step.

In a possible example, the second initial duration is the signal transmission delay between the ground location farthest from the satellite and the network device in the coverage area corresponding to the cell where the terminal device is located.

In a possible example, the second initial duration is determined by the network device according to the first position of the terminal device and the motion parameters of the satellite, and the first position is the direction of the network device. The location of the terminal device when the terminal device sends the second initial duration.

In a possible example, in terms of adjusting the PDCP reordering timer according to the first information, the one or more programs 321 include instructions for performing the following operations:

In a possible example, in terms of adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite, the one or more programs 321 include: instruction:

In a possible example, in terms of adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite, the one or more programs 321 further include methods for performing the following operations The instructions:

Please refer to FIG. 4, which is a schematic structural diagram of a network device 400 provided by an embodiment of the present application. As shown in the figure, the network device 400 includes a processor 410, a memory 420, a communication interface 430, and one or more programs. 421, wherein the one or more programs 421 are stored in the foregoing memory 420 and configured to be executed by the foregoing processor 410, and the one or more programs 421 include instructions for performing the following operations.

It can be seen that in this embodiment of the application, the network device sends first information to the terminal device, and the first information is used by the terminal device to adjust the PDCP reordering timer. In this way, the PDCP of the terminal device can be flexibly adjusted The duration of the reordering timer. This duration refers to the maximum time that a terminal device can wait for a PDCP PDU that has been transmitted but has not been received correctly after receiving a PDCP PDU. Therefore, the downlink HARQ feedback function is disabled and is not supported In the case of ARQ retransmission, when data is transmitted between the terminal device and the network device, it can avoid data packet loss too early or too late, and improve the terminal device's experience of transmitting service data.

In a possible example, the first information includes a first initial duration, a first adjustment period, and a first adjustment step, and the first initial duration is used by the terminal device to adjust the PDCP reordering timer. Until the first initial duration; the first adjustment period and the first adjustment step are used for the terminal device to periodically adjust the duration of the PDCP reordering timer.

The second position reported by the terminal device is received, and the first initial duration, the first adjustment period, and the first adjustment step are determined according to the second position.

In a possible example, the first information is sent to the terminal device through RRC signaling or a medium access control control unit MAC CE.

In a possible example, the first information includes a first duration, and the first duration is used by the terminal device to update the duration of the PDCP reordering timer according to the first duration.

In a possible example, the first information is sent to the terminal device through physical downlink control channel PDCCH indication signaling.

In a possible example, before the first information is sent to the terminal device, the one or more programs 321 further include instructions for performing the following operations:

Sending a second initial duration to the terminal device, where the second initial duration is used by the terminal device to configure the PDCP reordering timer.

The second adjustment period and the second adjustment step are sent to the terminal device; the second adjustment period and the second adjustment step are used by the terminal device to periodically perform the period of the PDCP reordering timer adjust.

In a possible example, the second initial duration, the second adjustment period or the second adjustment step is sent to the terminal device through RRC signaling.

In a possible example, the second initial duration is determined according to the first position of the terminal device and the motion parameters of the satellite, and the first position is the time when the network device sends the terminal device to the terminal device. The location of the terminal device at the second initial duration.

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal The transmission delay becomes smaller, and the third difference between the first maximum delay of signal transmission between the network device and the terminal device and the current delay of signal transmission between the satellite and the terminal device is determined; if said If the third difference is greater than or equal to the maximum duration set by the network device, the maximum duration is taken as the second initial duration; if the third difference is less than the maximum duration, the third difference is taken as The second initial duration.

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal If the transmission delay first becomes smaller and then becomes larger, or becomes larger and then smaller, it is determined that the second largest delay of signal transmission between the network device and the terminal device that the terminal device has experienced and the satellite and the terminal A fourth difference between the current delays of signal transmission between devices; if the fourth difference is greater than or equal to the maximum duration set by the network device, use the maximum duration as the second initial duration; if The fourth difference is less than the maximum duration, and the fourth difference is used as the second initial duration.

In a possible example, the first information includes the maximum duration of the PDCP reordering timer, and the maximum duration is determined according to the QoS delay of the radio bearer.

In a possible example, the first information is sent to the terminal device through RRC signaling.

The foregoing mainly introduces the solution of the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to implement the above-mentioned functions, the terminal device includes a hardware structure and/or software module corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiment of the present application may divide the terminal device into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software program modules. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of using an integrated unit, FIG. 5 shows a block diagram of a possible functional unit composition of the PDCP reordering timer configuration device involved in the foregoing embodiment. The PDCP reordering timer configuration device 500 is applied to a terminal device, and specifically includes: a processing unit 502 and a communication unit 503. The processing unit 502 is used to control and manage the actions of the terminal device. For example, the processing unit 502 is used to support the terminal device to perform step 202 in FIG. 2A and/or other processes used in the technology described herein. The communication unit 503 is used to support communication between the terminal device and other devices. The terminal device may also include a storage unit 501 for storing program codes and data of the terminal device.

The processing unit 502 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 503 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 501 may be a memory. When the processing unit 502 is a processor, the communication unit 503 is a communication interface, and the storage unit 501 is a memory, the terminal device involved in the embodiment of the present application may be the terminal device shown in FIG. 3.

In specific implementation, the processing unit 502 is used to perform any step performed by the terminal device in the above method embodiment, and when performing data transmission such as sending, the communication unit 503 can be optionally invoked to complete the corresponding operation . The detailed description will be given below.

The communication unit 503 is configured to receive first information sent by a network device;

The processing unit 502 is configured to adjust the PDCP reordering timer according to the first information.

In a possible example, the first information includes a first initial duration, a first adjustment period, and a first adjustment step. In the aspect of adjusting the PDCP reordering timer according to the first information, the The processing unit 502 is also used for:

In a possible example, the communication unit 503 is further configured to:

In a possible example, the first information includes a first duration. In the aspect of adjusting the PDCP reordering timer according to the first information, the processing unit 502 is specifically configured to:

In a possible example, before the first information sent by the network device is received, the communication unit 503 is further configured to receive the initial duration sent by the network device;

The processing unit 502 is further configured to configure the PDCP reordering timer according to the second initial duration.

In a possible example, before the receiving the first information sent by the network device, the communication unit 503 is further configured to receive the second adjustment period and the second adjustment step size sent by the network device;

The processing unit 502 is further configured to periodically adjust the duration of the PDCP reordering timer according to the second adjustment period and the second adjustment step.

In a possible example, in the aspect of adjusting the PDCP reordering timer according to the first information, the processing unit 502 is specifically configured to:

In a possible example, in terms of adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite, the processing unit 502 is specifically configured to:

In the case of using an integrated unit, FIG. 6 shows a block diagram of a possible functional unit composition of the PDCP reordering timer configuration device involved in the foregoing embodiment. The PDCP reordering timer configuration device 600 is applied to a network device, and the network device includes a processing unit 602 and a communication unit 603. The processing unit 602 is used to control and manage the actions of the network device. For example, the processing unit 502 is used to support the network device to perform step 201 in FIG. 2A and/or other processes used in the technology described herein. The communication unit 603 is used to support communication between the network device and other devices. The network device may also include a storage unit 601 for storing program codes and data of the terminal device.

The processing unit 602 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of this application. The processor may also be a combination for realizing computing functions, for example, including a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 603 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 601 may be a memory. When the processing unit 602 is a processor, the communication unit 603 is a communication interface, and the storage unit 601 is a memory, the terminal device involved in the embodiment of the present application may be the network device shown in FIG. 4.

The processing unit 602 is configured to control the communication unit 603 to send first information to a terminal device, and the first information is used to adjust the PDCP reordering timer by the terminal device.

In a possible example, the communication unit 603 is further configured to receive the second position reported by the terminal device;

The processing unit 602 is further configured to determine the first initial duration, the first adjustment period, and the first adjustment step according to the second position.

In a possible example, before the first information is sent to the terminal device, the communication unit 603 is further configured to:

In a possible example, the processing unit 602 is further configured to:

The embodiment of the present application also provides a chip, wherein the chip includes a processor, which is used to call and run a computer program from the memory, so that the device installed with the chip executes the method described in the terminal device in the above method embodiment. Part or all of the steps.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal in the above method embodiment Some or all of the steps described by the device.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the network in the above-mentioned method embodiment. Some or all of the steps described by the device.

The embodiments of the present application also provide a computer program product, wherein the computer program product includes a computer program, and the computer program is operable to make a computer execute part or all of the steps described in the terminal device in the above method embodiment. The computer program product may be a software installation package.

The steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may also exist as discrete components in the access network device, the target network device, or the core network device.

Those skilled in the art should be aware that, in one or more of the foregoing examples, the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)) )Wait.

The specific implementations described above further describe the purpose, technical solutions, and beneficial effects of the embodiments of the application in detail. It should be understood that the foregoing descriptions are only specific implementations of the embodiments of the application, and are not used for To limit the protection scope of the embodiments of the application, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the application shall be included in the protection scope of the embodiments of the application.

Claims

A PDCP reordering timer configuration method is characterized in that it is applied to a terminal device, and the method includes:

Receiving the first information sent by the network device;

Adjusting the PDCP reordering timer according to the first information.
The method according to claim 1, wherein the first information includes a first initial duration, a first adjustment period, and a first adjustment step, and the PDCP reordering timer is adjusted according to the first information ,include:

Update the duration of the PDCP reordering timer according to the first initial duration;

Periodically adjust the duration of the PDCP reordering timer according to the first adjustment period and the first adjustment step.
The method according to claim 2, wherein the method further comprises:

Reporting the second location of the terminal device to the network device, where the second location is used by the network device to determine the first initial duration, the first adjustment period, and the first adjustment step.
The method according to claim 1, wherein the first information includes a first duration, and the adjusting the PDCP reordering timer according to the first information includes:

The duration of the PDCP reordering timer is updated according to the first duration.
The method according to any one of claims 2-4, wherein before the receiving the first information sent by the network device, the method further comprises:

Receiving the second initial duration sent by the network device;

The PDCP reordering timer is configured according to the second initial duration.
The method according to claim 5, characterized in that, before the receiving the first information sent by the network device, the method further comprises:

Receiving the second adjustment period and the second adjustment step size sent by the network device;

Periodically adjust the duration of the PDCP reordering timer according to the second adjustment period and the second adjustment step.
The method according to claim 5 or 6, wherein the second initial duration is the signal transmission time between the ground position farthest from the satellite and the network device in the coverage area corresponding to the cell where the terminal device is located. Extension.
The method according to claim 5 or 6, wherein the second initial duration is determined by the network device according to the first position of the terminal device and the motion parameters of the satellite, and the first position The location of the terminal device when the second initial duration is sent to the terminal device by the network device.
The method according to claim 1, wherein the first information includes the maximum duration of the PDCP reordering timer, and the maximum duration is determined by the network device according to the QoS delay of the radio bearer.
The method according to claim 9, wherein the adjusting the PDCP reordering timer according to the first information comprises:

When it is determined that the first information includes the maximum duration, the duration of the PDCP reordering timer is adjusted according to the current position of the terminal device and the motion parameters of the satellite.
The method according to claim 10, wherein the adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite comprises:

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay becomes larger , It is determined that the duration of the PDCP reordering timer is 0.
The method according to claim 10, wherein the adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite comprises:

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay becomes smaller , Determining the first difference between the first maximum delay of signal transmission between the network device and the terminal device and the current delay of signal transmission between the satellite and the terminal device; if the first difference is greater than Or equal to the maximum duration, update the duration of the PDCP reordering timer according to the maximum duration, and if the first difference is less than the maximum duration, update the PDCP reordering timing according to the first difference The duration of the device.
The method according to claim 10, wherein the adjusting the duration of the PDCP reordering timer according to the current position of the terminal device and the motion parameters of the satellite comprises:

Determine the signal transmission delay change information between the terminal device and the network device according to the current position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate that the signal transmission delay changes first The second largest delay of signal transmission between the network device and the terminal device and the signal transmission between the satellite and the terminal device that have been experienced by the terminal device and the signal transmission between the satellite and the terminal device are determined If the second difference is greater than or equal to the maximum duration, update the duration of the PDCP reordering timer according to the maximum duration, if the second difference If it is less than the maximum duration, the duration of the PDCP reordering timer is updated according to the second difference.
A PDCP reordering timer configuration method is characterized in that it is applied to a network device, and the method includes:

Send first information to the terminal device, where the first information is used by the terminal device to adjust the PDCP reordering timer.
The method according to claim 14, wherein the first information includes a first initial duration, a first adjustment period, and a first adjustment step, and the first initial duration is used by the terminal device according to the The first initial duration updates the duration of the PDCP reordering timer; the first adjustment period and the first adjustment step are used for the terminal device to periodically adjust the duration of the PDCP reordering timer .
The method according to claim 15, wherein the method further comprises:

The second position reported by the terminal device is received, and the first initial duration, the first adjustment period, and the first adjustment step are determined according to the second position.
The method according to claim 15 or 16, wherein the first information is sent to the terminal device through RRC signaling or a medium access control control unit MAC CE.
The method according to claim 14, wherein the first information includes a first duration, and the first duration is used by the terminal device to update the duration of the PDCP reordering timer according to the first duration .
The method according to claim 18, wherein the first information is sent to the terminal device through physical downlink control channel PDCCH indication signaling.
The method according to any one of claims 15-19, wherein before the sending the first information to the terminal device, the method further comprises:

Sending a second initial duration to the terminal device, where the second initial duration is used by the terminal device to configure the PDCP reordering timer.
The method according to claim 20, characterized in that, before the sending the first information to the terminal device, the method further comprises:

The second adjustment period and the second adjustment step are sent to the terminal device; the second adjustment period and the second adjustment step are used for the terminal device to periodically adjust the duration of the PDCP reordering timer .
The method according to claim 21, wherein the second initial duration, the second adjustment period or the second adjustment step is sent to the terminal device through RRC signaling.
The method according to any one of claims 20-22, wherein the second initial duration is the distance between the ground position farthest from the satellite and the network device in the coverage area corresponding to the cell where the terminal device is located. Signal transmission delay.
The method according to any one of claims 20-22, wherein the second initial duration is determined according to the first position of the terminal device and the motion parameters of the satellite, and the first position is The network device sends the location of the terminal device at the second initial duration to the terminal device.
The method according to claim 24, wherein the method further comprises:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal transmission time The extension becomes larger, and it is determined that the second initial duration is zero.
The method according to claim 24, wherein the method further comprises:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal The transmission delay becomes smaller, and the third difference between the first maximum delay of signal transmission between the network device and the terminal device and the current delay of signal transmission between the satellite and the terminal device is determined; if said If the third difference is greater than or equal to the maximum duration set by the network device, the maximum duration is taken as the second initial duration; if the third difference is less than the maximum duration, the third difference is taken as The second initial duration.
The method according to claim 24, wherein the method further comprises:

The network device determines the signal transmission delay change information between the terminal device and the network device according to the first position and the motion parameters of the satellite, if the signal transmission delay change information is used to indicate the signal If the transmission delay first becomes smaller and then becomes larger, or becomes larger and then smaller, it is determined that the terminal device has experienced the second largest delay of signal transmission between the network device and the terminal device and the satellite and the terminal device. A fourth difference between the current delays of signal transmission between devices; if the fourth difference is greater than or equal to the maximum duration set by the network device, use the maximum duration as the second initial duration; if The fourth difference is less than the maximum duration, and the fourth difference is used as the second initial duration.
The method according to claim 14, wherein the first information includes the maximum duration of the PDCP reordering timer, and the maximum duration is determined according to the QoS delay of the radio bearer.
The method according to claim 28, wherein the first information is sent to the terminal device through RRC signaling.
A PDCP reordering timer configuration device is characterized in that it is applied to a terminal device, and the device includes a processing unit and a communication unit, wherein:

The communication unit is configured to receive first information sent by a network device;

The processing unit is configured to adjust the PDCP reordering timer according to the first information.
A PDCP reordering timer configuration device is characterized in that it is applied to network equipment, and the device includes a processing unit and a communication unit, wherein:

The processing unit is configured to control the communication unit to send first information to a terminal device, where the first information is used to adjust the PDCP reordering timer by the terminal device.
A terminal device, characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, The program includes instructions for performing the steps in the method according to any one of claims 1-13.
A network device, characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, The program includes instructions for performing the steps in the method according to any one of claims 14-29.
A chip, characterized by comprising: a processor, used to call and run a computer program from the memory, so that the device installed with the chip executes the method described in any one of claims 1-13 or 14-29 method.
A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1-13 or 14-29 .
A computer program that causes a computer to execute the method according to any one of claims 1-13 or 14-29.