WO2021146865A1

WO2021146865A1 - Communication method and device, apparatus, and storage medium

Info

Publication number: WO2021146865A1
Application number: PCT/CN2020/073316
Authority: WO
Inventors: 付喆
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-07-29
Also published as: CN114642023A

Abstract

A communication method and device, an apparatus, and a storage medium. The method comprises: acquiring configuration information, the configuration information instructing a PDCP entity to repeatedly transmit first information (S101); repeatedly transmitting the first information to a second apparatus according to the configuration information (S102); and processing multiple pieces of first information (S103). In the invention, configuration information is used to instruct a PDCP entity to repeatedly transmit first information at the same time, such that transmission can be performed without having to wait for completion of reception of a packet, thereby solving the problem of transmission delay in the art, and improving transmission performance.

Description

Communication method, device, equipment and storage medium

Technical field

The embodiments of the present application relate to communication technologies, and in particular, to a communication method, device, device, and storage medium.

Background technique

Currently, the 3rd Generation Partnership Project (3GPP) is studying non-terrestrial communication network (Non Terrestrial Network, NTN) technology. NTN generally uses satellite communication to provide communication services to ground users, that is, terminal equipment and A communication network between satellites (also called network devices). Compared with terrestrial cellular network communication, satellite communication has many unique advantages.

During the communication between the terminal device and the network device, when one device fails to send data to another device, the failed data is usually retransmitted. Currently, the device’s Packet Data Convergence Protocol (PDCP) layer supports reordering and in-order delivery functions. The receiver of the PDCP entity has a PDCP protocol data unit (Protocol Data Unit, PDU) buffer, which is used for reordering the PDCP PDU to ensure that it is delivered to the upper layer in order. If a certain radio bearer is configured to be delivered in order, then this buffer exists, and the PDCP receiver reorders the received PDCP PDUs and then delivers them to the upper layer in order. 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.

According to the above scheme, the receiver of the PDCP entity needs to wait for the previous packet to be received before it can be delivered to the higher layer. In this way, there is the problem of PDCP retransmission delay, which leads to the signal between the terminal device and the network device in the current NTN transmission The propagation delay increases significantly, which will cause the PDCP packet retransmission delay to increase significantly, resulting in a decrease in system transmission performance.

Summary of the invention

The embodiments of the present application provide a communication method, device, equipment, and storage medium, which are used to solve the problem that the signal propagation delay between terminal equipment and network equipment has increased significantly in the current NTN transmission, and the propagation delay will increase significantly, which will lead to The delay of retransmission of PDCP packets is greatly increased, causing the problem of system transmission performance degradation.

In the first aspect, embodiments of the present application may provide a communication method applied to a first device, and the method includes:

Acquiring configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information;

According to the configuration information, the first information is repeatedly sent to the second device.

In the second aspect, embodiments of the present application may provide a communication method applied to a second device, and the method includes:

Receiving multiple pieces of first information repeatedly sent by the first device through the PDCP entity;

Processing the plurality of first information.

In the third aspect, embodiments of the present application may provide a communication device, including:

An obtaining module, configured to obtain configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information;

The sending module is configured to repeatedly send the first information to the second device according to the configuration information.

In a fourth aspect, an embodiment of the present application may provide a communication device, including:

A receiving module, configured to receive multiple pieces of first information repeatedly sent by the first device through the PDCP entity;

The processing module is configured to process the multiple pieces of first information.

In a fifth aspect, an embodiment of the present application may provide an electronic device, including:

Processor, memory, and communication interface with other electronic devices;

The memory stores computer execution instructions;

The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method provided in the first aspect.

In a sixth aspect, an embodiment of the present application may provide an electronic device, including:

Processor, memory, and communication interface with other electronic devices;

The memory stores computer execution instructions;

The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method provided in the second aspect.

In the seventh aspect, the embodiments of the present application may provide a computer-readable storage medium having computer-executable instructions stored in the computer-readable storage medium. When the computer-executable instructions are executed by a processor, they are used to implement the The communication method provided.

In an eighth aspect, the embodiments of the present application may provide a computer-readable storage medium having computer-executable instructions stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, they are used to implement the The communication method provided.

In a ninth aspect, an embodiment of the present application may provide a chip including: a processing module and a communication interface, where the processing module is configured to execute the communication method provided in the first aspect.

In a tenth aspect, an embodiment of the present application may provide a chip, including a processing module and a communication interface, and the processing module is configured to execute the communication method provided in the second aspect.

In the communication method, device, device, and storage medium provided by the embodiments of the present application, when the first device transmits information to the second device, when the configuration information used to instruct the PDCP entity to repeatedly send the first information is obtained, the configuration information is , To repeatedly send the first information to the second device, and when the second device at the receiving end receives multiple pieces of first information repeatedly sent by the first device, the first information is processed to obtain the required information. The configuration information indicates that the first information is repeatedly sent on the PDCP entity at the same time, and there is no need to wait for a packet to be received and then transmitted, so as to solve the current transmission delay problem and improve the transmission performance.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram of an NTN communication system provided by an embodiment of this application;

2 is a schematic flowchart of Embodiment 1 of a communication method provided by an embodiment of this application;

3 is a schematic flowchart of Embodiment 2 of the communication method provided by this embodiment;

4 is a schematic diagram of transmission of an example of the communication method provided by this embodiment;

FIG. 5 is a schematic flowchart of Embodiment 2 of the communication method provided by this embodiment;

6 is a schematic diagram of transmission of another example of the communication method provided by this embodiment;

FIG. 7 is a schematic flowchart of Embodiment 3 of the communication method provided by this embodiment;

8 is a schematic diagram of transmission of another example of the communication method provided by this embodiment;

FIG. 9 is a schematic structural diagram of Embodiment 1 of the communication device provided by this embodiment;

10 is a schematic structural diagram of Embodiment 2 of the communication device provided by this embodiment;

11 is a schematic structural diagram of Embodiment 3 of the communication device provided by this embodiment;

FIG. 12 is a schematic structural diagram of Embodiment 4 of the communication device provided by this embodiment;

FIG. 13 is a schematic diagram of the structure of the electronic device provided by this embodiment.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The terms "first", "second", etc. in the description, claims, and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

Compared with terrestrial cellular network communications, satellite communications are not restricted by the user area. For example, general terrestrial communications cannot cover areas where communication equipment cannot be installed, such as oceans, mountains, and deserts, or areas that cannot be covered by communications due to sparse population. In terms of satellite communications, since a satellite can cover a larger ground, and the satellite can orbit the earth, theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has greater social value. Satellite communications can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these regions can enjoy advanced communications and mobile Internet technologies, which is conducive to narrowing the digital gap with developed regions and promoting these Regional development. Thirdly, the satellite communication distance is long, and the communication cost has not increased significantly with the increase of the communication distance; finally, the stability of satellite communication is high, and it is not restricted by natural disasters.

Communication satellites are divided 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. At this stage, the main research is LEO and GEO. The following is an introduction to the specific situation.

1.LEO

The altitude of low-orbit satellites ranges from 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between users is generally less than 20ms. The maximum satellite viewing time is 20 minutes. The signal propagation distance is short, the link loss is small, and the requirement for the transmission power of the user terminal is not high.

2.GEO

A geosynchronous orbit satellite with an orbital height of 35786km and a rotation period of 24 hours around the earth. The signal propagation delay of single-hop communication between users is generally 250ms.

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

Based on the advantages of the above-mentioned satellite communication, non-terrestrial communication network technology (Non Terrestrial Network, NTN) such as satellite communication has also become the main direction of current communication research.

In the New Radio (NR) network research on NTN technology, when the device communicates with the device, the Packet Data Convergence Protocol (PDCP) layer is mapped to a dedicated control channel (Dedicated Control Channel, The radio bearers of DCCH and Dedicated Transmission Channel (DTCH) provide transmission services. Each radio bearer corresponds to a PDCP layer entity, and each PDCP layer corresponds to 1, 2, or 4 radio link control (Radio Link Control, RLC) entities (according to unidirectional transmission/bidirectional transmission, bearer division/undivision , RLC mode, etc. are determined). If the bearer is not divided, one PDCP entity corresponds to one Unacknowledged Mode (UM) RLC (one-way), or two UM RLC entities (one for each two-way), or one Acknowledged Mode (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.

When communicating between devices based on NTN technology, the PDCP layer supports reordering and in-order delivery functions. The receiver of the PDCP entity has a PDCP protocol data unit (Protocol Data Unit, 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 needs to be delivered in order, then this buffer exists, and the PDCP receiver reorders the received PDCP PDUs and then delivers them to the upper layer in order.

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. Therefore, it is necessary to wait for the previous packet to be received before it can be delivered to the higher layer. In this way, there is a problem of PDCP retransmission delay.

Based on the above scheme, it can be seen that the signal propagation delay between the terminal equipment and the satellite in the NTN has increased significantly, and the large increase in the propagation delay will cause the PDCP packet retransmission delay to increase significantly, resulting in a decrease in system and transmission performance.

To solve this problem, at least a method for reducing PDCP retransmission delay in the NTN system needs to be considered. The embodiment of this application provides a communication method that can be applied to information transmission between two devices, that is, packet transmission. The meaning is similar. When transmitting information between devices, the device at the sending end repeatedly sends the information to be sent to the device at the receiving end based on the obtained configuration information indicating the PDCP entity to repeatedly send the information to be sent, avoiding the need to wait for the previous packet to be received at the PDCP layer. Can be submitted to the high-level delay caused by the problem.

Specifically, the communication method provided in the embodiments of the present application can be applied to transmit information between two devices. The two devices may be network devices and terminal devices, respectively, or PDCP entities, for example, transmitting PDCP entities and The receiving PDCP entity does not impose restrictions on this solution.

Fig. 1 is a schematic diagram of an NTN communication system provided by an embodiment of the application. As shown in Fig. 1, a specific application scenario is provided. The communication system includes at least one network device and a terminal device. Communication between devices is carried out through the NR network.

The network device may provide communication coverage in a specific geographic area, and may communicate with terminal devices located in the coverage area. Optionally, the network equipment can be a base station (Base Transceiver Station, BTS) in a satellite, a GSM system, or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved type in the LTE system A base station (Evolutional Node B, eNB or eNodeB), or a wireless controller in a Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, or a vehicle-mounted device , Wearable devices, hubs, switches, bridges, routers, network side devices in 5G networks, and network side devices in new network systems in the future.

The terminal equipment includes, but is not limited to, connection via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another Data connection/network; and/or via wireless interface, such as for cellular network, wireless local area network (WLAN), digital TV network such as DVB-H network, satellite network, AM-FM broadcast transmitter; and /Or a device of another terminal device that is set to receive/send communication signals; and/or an Internet of Things (IoT) device. A terminal device set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a "wireless terminal" or a "mobile terminal". Examples of the terminal equipment include, but are not limited to, satellite phones or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, and the Internet /Intranet access, Web browser, memo pad, calendar, and/or PDA with Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receiver or including radio phone transceiver Other electronic devices. It can refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. It can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), and a wireless communication function. Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, UEs in 5G networks, or terminals that will evolve in the future, etc.

When the network device is a satellite, the satellite and the terminal device can communicate directly or through a ground station, which is not limited in this solution.

Based on the foregoing application scenarios, the communication method provided in the present application will be described in detail through several specific embodiments below.

FIG. 2 is a schematic flowchart of Embodiment 1 of a communication method provided by an embodiment of this application. As shown in FIG. 2, the communication method at least includes the following steps:

S101: Acquire configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information.

In this step, the configuration information is mainly used to indicate repeated transmission on the PDCP entity, which may include specific repeated transmission instructions or activation instructions, or some repeated transmission parameter information, such as the number of repeated transmissions. , Repeat sending duration, etc.

Based on the configuration information, the first device can configure the PDCP entity, and in the subsequent information transmission process, the PDCP entity can repeatedly send information according to the parameters and/or instructions in the configuration information.

If the first device is implemented in a network device, the first device can be configured according to specific resource conditions and transmission requirements to obtain the configuration information.

If the first device is implemented in a terminal device, it can receive the configuration information sent by the network device, and the network can configure the PDCP entity to the first device through the RRC configuration information, repeat sending instructions, activation instructions, and/or repeatedly sending parameters At least one of.

Optionally, at least one of the parameters or instructions in the configuration information may also be determined by the first device, or predefined (pre-configured), and this solution is not limited.

In the specific implementation of the solution, the first information includes data information and control information, and specifically refers to a data packet sent on PDCP, which is also called PDCP PDU. The PDCP PDU includes at least one of the following: PDCP data (data) PDU and PDCP control (control) PDU. Wherein, the PDCP control PDU includes at least one of the following: a PDCP status report and a header compression feedback packet.

S102: According to the configuration information, repeatedly send the first information to the second device.

In this step, after obtaining the configuration information, the first device repeatedly sends the first information to the second device according to the configuration information, so that the second device can receive multiple pieces of first information repeatedly sent by the first device through the PDCP entity.

In the specific implementation of this step, the first device sending the first information includes the following ways:

In the first type, when the first condition is met, the PDCP entity repeatedly sends the first information to the second device according to the configuration information.

In the implementation of this manner, the PDCP entity may be a transmitting PDCP entity or a receiving PDCP entity, which is not limited in this solution.

In the second type, when the first condition is met, the copy transmission is activated for the first information, and then the copy transmission process is performed, or the first information is directly sent repeatedly to the second device according to the configuration information.

In the implementation of this mode, a copy transmission mode is configured, but in specific implementation, it is first necessary to activate the copy transmission mode when certain conditions are met, and then repeat the transmission of the first information according to the configuration information.

S103: Process multiple pieces of first information.

In this step, for the second device on the receiving end, if the first device on the sending end performs repeated transmission or adopts a copy transmission method, when the second device receives multiple pieces of first information, it needs to perform multiple transmissions. The first information is processed (for example, repeated packet detection and/or discarding) to obtain the first information sent by the first device.

In the specific implementation of the solution, the manner in which the second device processes the multiple pieces of first information includes at least discarding the repeated first information, or discarding the first information received later.

In common implementations, it should be understood that the system protocol stack architecture of the device includes the non-access stratum (NAS), as well as the RRC, PDCP, RLC, and Media Access Control (Media Access Control) of the access layer. MAC), physical (Physical, PHY) five layers, of which RRC is responsible for the air interface connection, which belongs to the connection layer and only exists in the control plane; PDCP performs segment linking, header compression and encryption on the data from the upper layer, and RLC is the data plane Only, the radio link control function is mainly automatic repeat-reQuest (ARQ) error correction; the MAC layer is mainly used for hybrid automatic repeat-reQuest (Hybrid-Automatic Repeat-reQuest, HARQ) and scheduling functions. When the PDCP entity sends the first information, it is first sent to the RLC entity of the lower layer, and then the RLC entity is sent to the MAC layer, and the MAC layer is sent down to the PHY for transmission. For the second device on the receiving end, the PHY layer is receiving After the first information is reached, it is forwarded to the MAC layer, the MAC layer is forwarded to the corresponding RLC entity, and then forwarded to the PDCP entity through the RLC entity to complete the transmission of information from the PDCP entity to the PDCP entity.

In the communication method provided in this embodiment, when the first device is transmitting information to the second device, when the configuration information used to instruct the PDCP entity to repeatedly send the first information is obtained, the configuration information is repeatedly sent to the second device according to the configuration information. For the first information, when the second device at the receiving end receives multiple pieces of first information repeatedly sent by the first device, the first information is processed to obtain the required information. The configuration information instructs the repeated transmission of the first information on the PDCP entity, which specifically includes the following methods: sending multiple packets at the same time, waiting for a preset time after the packet is sent for the first time to send again, or if the packet is sent for the first time If no ACK is received, the next copy packet is sent. The communication method provided by the embodiment of the present application does not need to wait for a packet to be received before transmission is performed, so as to solve the current transmission delay problem and improve the transmission performance.

In the specific implementation of the foregoing embodiment, the specific types and forms of the first device and the second device are not limited by this solution. The communication method provided in the embodiments of the present application can be applied to at least the following situations for information transmission, specifically:

The first device is a terminal device, and the second device is a network device; or,

The first device is a network device, and the second device is a terminal device; or,

The first device is a PDCP transmitting entity, and the second device is a PDCP receiving entity; or,

The first device is a PDCP receiving entity, and the second device is a PDCP transmitting entity.

Based on the above content, it can be known that the communication method provided in this application includes at least several specific implementations of using the transmitting PDCP entity to send the first information, using the receiving PDCP entity to send the first information, and activating copy transmission to send the first information. .

In the following, the first information is PDCP PDU, the first device is a terminal device, and the second device is a network device as an example, and several specific examples are used to describe respectively.

The first

In this embodiment, when the first condition is met, the transmitting PDCP entity repeatedly sends the PDCP PDU to the second device according to the configuration information. Based on the foregoing embodiment, the PDCP entity includes the transmitting PDCP entity.

The receiving entity of the receiving end network device performs repeated packet detection and/or discarding, and obtains the PDCP PDU sent by the transmitting end terminal device. For example, the PDCP PDU for the same data received or parsed after being discarded.

FIG. 3 is a schematic flowchart of Embodiment 2 of the communication method provided in this embodiment. As shown in FIG. 3, the communication method provided in this embodiment specifically includes the following steps:

S201: Receive RRC configuration information sent by a network device, and configure a PDCP entity for each bearer according to the RRC configuration information.

In this step, the terminal device receives the RRC configuration information sent by the network device, and then configures a PDCP entity for each bearer. Specifically, the RRC configuration information may configure at least one of the following for each PDCP, or specific PDCP, or each RB, or specific RB, or DRB, or specific DRB:

Packet retransmission instruction or the packet retransmission activation instruction;

The number of repeated packet transmissions;

The duration of repeated packet transmission;

Packet retransmission activation time;

The activation duration of repeated packet transmission;

A first preset threshold, where the first preset threshold is a set minimum threshold of channel quality, and if the channel quality is lower than or equal to the first preset threshold, repeated transmission is required;

The second preset threshold, the second preset threshold is the longest acceptable delay value of the transmission delay between the terminal device and the network device, if the transmission delay is equal to or exceeds the second preset Threshold value, you need to repeat the transmission.

In addition to indicating the PDCP entity configuration, the configuration information provided by the network to the terminal device also includes at least one of the above-mentioned indications or parameters. This parameter can be indicated in a dedicated message with PDCP-config, or it can be indicated in a separate dedicated message.

In addition, the configuration information is also used to configure conditions, which can be repeatedly sent based on parameter judgments when certain conditions are met, and this solution does not impose restrictions on this.

When the above instructions or parameter configuration is performed on the network side through the RRC configuration information, if the network device side does not know the location information of the terminal device at this time, at least one of the above parameters can be configured with a larger value, such as a larger number of times , Or a lower threshold. For example, when the network device is a satellite, the second preset threshold (that is, the transmission delay threshold) is configured as the distance between the ground position X from the satellite and the network device in the cell coverage area The signal transmission delay.

If the network device knows the location information of the terminal device, or the terminal device has already reported the location information, the network device can determine the parameters in the above configuration information according to the location information of the terminal device. For example, when the network device is a satellite, at least one of the configurable parameters of the configuration information is determined according to the satellite motion track, the location information of the terminal device, and the current location of the satellite.

Optionally, in a possible implementation manner, the indication or any parameter in the configuration information may also be determined by the terminal device itself, or predefined, and this solution is not limited.

S202: When the first condition is met, the transmitting PDCP entity repeatedly sends the PDCP PDU according to the RRC configuration information.

In this solution, the transmitting PDCP entity of the terminal device repeatedly sends at least one PDCP PDU, where the PDCP PDU can be a PDCP data PDU or a PDCP control PDU (including PDCP status report and/or header compression feedback packet) , It can also be other content, for example, preset information on specific bearers, information on each bearer, preset information on specific PDCP entities, and information on each PDCP entity. This solution does not impose restrictions.

Based on this, it can be understood that in the specific application process of the technical solution of this embodiment, the first information that can be transmitted includes at least one of the following: preset information on bearers, preset information on each bearer, preset information on PDCP entities , Information on each PDCP entity, PDCP status report, header compression feedback packet, PDCP data PDU.

In the implementation of this step, when the first condition is met, the transmitting PDCP entity (also referred to as the PDCP sending entity) of the terminal device repeatedly sends at least one PDCP PDU. The first condition may be configured by the network device, may also be a condition set by the terminal device, or may be a predefined condition. The first condition here includes at least one of the following:

Receiving an indication of repeated packet transmission from the network, or receiving an activation indication of repeated packet transmission from the network;

The number of repeated transmissions of packets received from the network;

The duration of repeated transmission of packets received from the network;

Re-send the activation time of the packet received from the network;

Received packets from the network repeatedly sent activation duration, for example, within the activation duration, at least one of the data packets can be repeatedly sent N times, or can be repeatedly sent within the duration L, where N represents the number of times, which is positive Integer;.

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the repeated sending time of the packet;

Satisfy the packet repeat sending condition.

For example, when the network device is a satellite, when the transmission delay between the terminal device and the satellite is greater than or equal to the second preset threshold, or when receiving a packet repeated transmission instruction indicated by the network, the terminal device transmits PDCP When an entity sends a PDCP PDU, it continuously repeats the same RLC PDU, and the number of repeated transmissions is N.

Optionally, S203: the terminal device reports location information to the network device.

In this solution, if the terminal device has not reported location information to the network device before, or the location of the terminal device changes, it needs to report its location information to the network device.

The network device receives the location information reported by the terminal device so that the network device can perform subsequent processing based on the location information.

For example, when the network device is a satellite, the configuration information can be determined according to the location information of the terminal device, the current location of the satellite, and the trajectory. For example, the satellite can determine the distance between the terminal and the satellite based on the current position of the terminal, its own motion trajectory, and the motion trajectory of the next satellite, and then determine whether to use the packet retransmission mechanism, such as the configured packet retransmission times and when Activate the packet repeat sending function, etc.

S204: The network device receives the PDCP PDU sent by the terminal device.

In this step, the network device detects and receives the PDCP PDU sent by the terminal device.

Specifically, if the PDCP entity of the terminal device at the sending end executes the packet retransmission mechanism or function, the receiving PDCP entity of the network device will also perform at least one of the following actions:

1) Duplicate packet detection;

2) Duplicate packets are discarded.

In a specific implementation, if a data packet corresponding to the same SN is received, that is, multiple PDUs sent by the terminal device correspond to the same SN, then the received data packet with the same SN number after being discarded by the PDCP is received.

Figure 4 is a transmission schematic diagram of an example of the communication method provided by this embodiment. As shown in Figure 4, in the specific implementation of the solution, the network device can configure repeated transmission of packets through RRC configuration information, and can configure repeated transmission of each packet The number of times is 2, the transmission PDCP entity of the terminal device that receives the configuration information still performs packet transmission in the original way, until the packet retransmission activation instruction (that is, the aforementioned packet retransmission activation instruction) is received, and the retransmission is activated After that, in the subsequent transmission process, each PDCP PDU is repeatedly sent twice continuously.

In this manner, the packet retransmission activation instruction or the packet retransmission instruction can be carried to the terminal device through messages such as RRC, Downlink Control Information (DCI), or MAC CE, which is not limited by this solution.

In the communication method provided in the foregoing embodiment, the network device configures the terminal device to perform repeated transmission of PDUs on the PDCP entity, and sets certain conditions. When the conditions are met, the repeated transmission is directly performed, which can effectively avoid repetitive transmission between the terminal device and the network device. The transmission delay can ensure the demand for service transmission quality and improve the transmission performance.

The second

In this embodiment, when the first condition is met, the receiving PDCP entity repeatedly sends PDCP control PDUs to the second device according to the configuration information. Based on the foregoing embodiment, the PDCP entity includes the receiving PDCP entity.

The receiving entity of the network device performs repeated packet detection and/or discarding, and finally parses the PDCP control PDU sent by the terminal device at the sending end.

FIG. 5 is a schematic flowchart of Embodiment 2 of the communication method provided by this embodiment. As shown in FIG. 5, the communication method provided by this embodiment specifically includes the following steps:

S301: Receive RRC configuration information sent by the network device, and configure a PDCP entity for each bearer according to the RRC configuration information.

In this step, the terminal device receives the RRC configuration information sent by the network device, and configures a PDCP entity for each RB. In the specific configuration process, for each PDCP, or specific PDCP, or each RB, or specific RB, or DRB, or specific DRB, configure at least one of the following:

Control PDU repeated transmission indication, or control PDU repeated transmission activation indication;

Control the number of repeated transmissions of PDU;

Control the duration of repeated transmission of PDUs;

Control PDU repeated transmission activation time;

The control PDU repeated transmission activation duration, that is, the PDCP control PDU repeated transmission activation duration, for example, within the activation duration, at least one of the PDCP control PDUs can be repeatedly transmitted N times, or can be used for repeated transmission within the duration L.

A first preset threshold, where the first preset threshold is a set minimum threshold of channel quality, and if the channel quality is equal to or lower than the first preset threshold, repeated transmission is required;

In a specific implementation of this solution, the control PDU included in the above configuration information may be specifically implemented as a PDCP control PDU.

The PDCP control PDU includes at least a PDCP status report and/or header compression feedback packet.

When the network device configures the above indication or parameter, if the location information of the terminal device is not known, at least one of the above parameters can be configured with a larger value, such as a larger number of times, or a lower threshold, such as: When the network device is a satellite, the second preset threshold, that is, the transmission delay threshold B, can be configured as the signal transmission delay between the ground location at a distance X from the satellite and the network within the coverage area of the cell.

In a specific implementation of this solution, if the network device knows the location information of the terminal device, or the terminal device has already reported the location information, the network device can determine the indication and/or parameter in the configuration information according to the location information of the terminal device. For example, when the network device is a satellite, at least one of the configurable parameters of the configuration information is determined according to the satellite motion track, the location information of the terminal device, and the current location of the satellite.

Optionally, in a possible implementation manner, the above-mentioned indication or any parameter may also be determined by the terminal device itself, or pre-defined, and no network device configuration is required, which is not limited in this solution.

S302: When the first condition is met, the receiving PDCP entity repeatedly sends the PDCP control PDU according to the RRC configuration information.

After receiving the RRC configuration information, the terminal device performs information transmission according to the configuration, which is also called packet transmission. The receiving PDCP entity (also referred to as the PDCP receiving entity) sends PDCP status PDUs according to the RRC configuration information, that is, the receiving PDCP entity sends the PDCP control PDU to the lower layer when the PDCP control PDU trigger condition is met. In this solution, the PDCP entity includes the receiving PDCP entity, and the first information transmitted includes at least one PDCP control PDU.

In the specific implementation of this step, when the first condition is met, the receiving PDCP entity repeatedly sends at least one PDCP control PDU triggered. The first condition may be configured by the network device, may also be a condition set by the terminal device, or may be predefined. The first condition includes at least one of the following:

Receiving a control PDU repeated transmission instruction from the network or receiving a control PDU repeated transmission activation instruction from the network;

The number of repeated transmissions of control PDUs received from the network;

The length of time when the control PDU is repeatedly sent from the network is received;

Receiving the control PDU retransmission activation time from the network;

Receiving the control PDU from the network to repeatedly send the activation time;

The channel quality is less than or equal to the first preset threshold;

Meet the repeated transmission time of control PDU;

Meet the repeated transmission condition of the control PDU.

Specifically, when the PDCP control PDU is sent, the control PDU in the above first condition is the PDCP control PDU.

In a specific implementation, when the network device is a satellite, when the transmission delay between the terminal device and the satellite is greater than or equal to the second preset threshold, or when the status report indicated by the network is received and the status report is repeatedly sent. , The receiving PDCP entity of the terminal device sends a PDCP status report to the lower layer, and activates the repeated transmission of the PDCP status report. The number of times the status report is repeatedly sent to the lower layer is N.

For another example, when the transmission delay between the terminal device and the satellite is greater than or equal to the second preset threshold, or a repeated transmission instruction of the header compression feedback packet is received from the network, the receiving PDCP entity of the terminal device sends a The header compression feedback packet is sent to the lower layer to activate the repeated transmission of this status report. The number of times the status report is repeatedly sent to the lower layer is N.

Optionally, S303: the terminal device reports location information to the network device.

For example, when the network device is a satellite, the configuration information can be determined according to the location information of the terminal device, the current location of the satellite, and the trajectory.

S304: The network device receives the PDCP control PDU sent by the terminal device.

Specifically, if the PDCP control PDU repeatedly sent by the terminal device side is received, the network device will also perform at least one of the following actions: 1) repeated packet detection; 2) repeated packet discarding.

In a specific implementation, after receiving the PDCP control PDU, the network device performs corresponding processing according to the received PDCP control PDU. For example, to delete a successful package, or to change the compression state.

In a specific implementation, after receiving multiple PDCP control PDUs, the content of the multiple PDCP control PDUs is the same or substantially the same, and the network device performs one of the following: 1) The received PDCP control PDU is discarded. 2) Perform status update and/or delete successful packets according to the latest received PDCP status PDU.

Figure 6 is a schematic diagram of transmission of another example of the communication method provided by this embodiment. As shown in Figure 6, in the specific implementation of the solution, the network device can configure the status report to repeat transmission through the RRC configuration information, and can configure each packet The number of repeated transmissions of the status report is 2, and the receiving PDCP entity of the terminal device that receives the configuration information still performs packet transmission in the original way, until the status report repeated transmission activation indication (that is, the aforementioned control PDU repeated transmission activation Indication), after activating the repeated transmission, in the subsequent transmission process, each status report (that is, the PDCP status PDU) is repeatedly sent twice in a row.

In this manner, the status report retransmission activation indication or the packet retransmission indication can be carried to the terminal device through messages such as RRC, Downlink Control Information (DCI), or MAC CE, which is not limited in this solution.

In the communication method provided in the foregoing embodiment, the network device configures the terminal device to repeatedly transmit the PDCP control PDU on the PDCP entity, and sets certain conditions. When the conditions are met, the repeated transmission is directly performed, which can effectively avoid the terminal device and the network device. The delay between retransmissions can ensure the requirements for service transmission quality and improve transmission performance.

The third

In this embodiment, when the first condition is met, the PDCP entity triggers the PDCP PDU duplication transmission mode and sends the PDCP PDU to the second device. Based on the foregoing embodiment, the PDCP entity includes the receiving PDCP entity or transmitting PDCP entity. The receiving entity of the network device performs repeated packet detection and/or discarding, and obtains the PDCP PDU sent by the terminal device at the sending end.

FIG. 7 is a schematic flowchart of Embodiment 3 of the communication method provided in this embodiment. As shown in FIG. 7, the communication method provided in this embodiment specifically includes the following steps:

S401: Receive RRC configuration information sent by a network device, and configure a PDCP entity for each bearer according to the RRC configuration information.

In this step, the terminal device receives the RRC configuration information sent by the network device, and configures a PDCP entity for the bearer.

In this solution, the object of replication transmission can be configured according to the RRC configuration information, which specifically includes at least one of the following:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report, including all PDCP status reports or specific DRB PDCP status reports;

Header compression feedback packets, including all header compression feedback packets or specific DRB header compression feedback packets;

PDCP data PDU, including PDCP data PDU of a specific DRB;

Preset information on QoS flow.

All of the above objects can be configured by the network device as information that can be transmitted in a copy transmission mode.

The RRC configuration information is also used to configure parameters and instructions in the use conditions of the replication transmission mode. Specifically, the RRC configuration information further includes one of the following:

The activation instruction of the copy transmission;

The number of said copy transmissions;

The number of RLC entities and/or RLC entity identifiers used in the replication transmission;

The cell group identity corresponding to the RLC entity used for the replication transmission;

The activation time of the copy transmission;

The activation duration of the copy transmission;

The first preset threshold, the first preset threshold is the lowest threshold of the channel quality that is set, if the channel quality is equal to or lower than the first preset threshold, the corresponding information needs to be copied and transmitted ；

The second preset threshold, the second preset threshold is the longest acceptable delay value of the transmission delay between the terminal device and the network device, if the transmission delay is equal to or exceeds the second preset Threshold value, you need to copy and transmit the corresponding information.

When the network device performs the above configuration without knowing the location information of the terminal device, at least one of the above parameters can be configured with a larger value, such as a larger number of times, or a lower threshold, such as: when the network device In the case of a satellite, the second preset threshold (that is, the transmission delay threshold) is configured to be the signal transmission delay between the ground position at a distance X from the satellite and the network within the coverage area of the cell.

If the network equipment knows the position information of the terminal equipment, the above parameters can be determined according to the satellite motion track, the position information of the terminal equipment and the current position of the satellite. The terminal device can also determine at least one of the above-mentioned parameters or instructions by itself, and of course it can also be predefined, which is not limited in this solution.

S402: When the first condition is met, the PDCP entity activates or uses the copy transmission for the use object of the copy transmission.

In this step, the terminal device performs data transmission according to the network device configuration. That is, the PDCP entity sends PDCP PDUs according to the RRC configuration information. In a specific implementation, when the first condition is met, the PDCP entity activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information. The first information is the use object of the configured copy transmission. The first condition may be configured by the network device, may also be a condition set by the terminal device, or may be predefined. The first condition specifically includes at least one of the following:

Received the activation instruction of the copy transmission from the network;

The number of replicated transmissions received from the network, that is, the total number of replicated PDCP PDUs (such as the total number of copies, or the total number of copies + original PDCP PDU);

Receive the number of RLC entities and/or RLC entity identifiers used for copy transmission from the network;

Receiving the cell group identifier corresponding to the RLC entity used for the replication transmission from the network;

The activation time of receiving the copy transmission from the network;

The channel quality is less than or equal to the first preset threshold;

Meet the sending time of copy transmission;

Meet the sending conditions of the copy transmission.

For example, when the network device is a satellite, when the transmission delay between the terminal device and the satellite is greater than or equal to the second preset threshold, the PDCP PDU of DRB1 is activated for duplication (duplication transmission), and each PDCP PDU is in accordance with the duplicated In this way, radio link control (Radio Link Control, RLC for short) entities 1, 2, and 3 are each sent once.

Optionally, S403: the terminal device reports location information to the network device.

The network device receives the location information reported by the terminal device so that the network device can perform subsequent processing based on the location information. For example, when the network device is a satellite, the configuration information can be determined according to the location information of the terminal device, the current location of the satellite, and the trajectory.

S404: The network device receives the PDCP PDU sent by the terminal device.

The network device detects and receives the PDCP PDU sent by the terminal device.

Specifically, if the PDCP entity of the terminal device at the sending end executes the PDU replication transmission mechanism or function, the receiving RLC entity of the network device will also perform at least one of the following actions:

1) Duplicate packet detection;

2) Duplicate packets are discarded.

In a specific implementation, when there is an SN in the received PDCP PDU, if a PDU corresponding to the same SN is received, that is, multiple PDUs sent by the terminal device correspond to the same SN, the network device performs duplicate packet detection And discarded.

Figure 8 is a schematic transmission diagram of another example of the communication method provided by this embodiment. As shown in Figure 8, in the specific implementation of the solution, the network device can configure PDU replication transmission through RRC configuration information, and can configure replication for DRB1 The number of transmissions is 3, and the RLC entity 123 is used for transmission. The PDCP entity of the terminal device that receives the RRC configuration information still performs packet transmission in the original way until the copy transmission is activated (the specific activation conditions are as the realization of the first condition) In the subsequent transmission process, each PDCP PDU is repeatedly sent 3 times continuously through the designated RLC entity.

In this manner, the activation instruction for the replication transmission can be carried to the terminal device through messages such as RRC, Downlink Control Information (DCI), or MAC CE, which is not limited in this solution.

In the communication method provided in the above embodiment, the network device configures the terminal device to copy and transmit the specified object, that is, the PDU, and set certain conditions. When the conditions are met, the method of copy transmission is activated, and it is performed in the subsequent transmission process. Replicated transmission can effectively avoid the delay of retransmission between terminal equipment and network equipment, and can ensure the demand for service transmission quality.

Based on all the above embodiments, it can be seen that the communication method provided in the application embodiment has the advantage of avoiding the transmission stagnation caused by the excessive transmission time caused by the excessive propagation delay between the terminal device and the network device, or the transmission state cannot be transmitted. Confirm in time to correctly receive the problem of excessive delay. Effectively guarantee the QoS requirements of service transmission and improve the transmission performance.

FIG. 9 is a schematic structural diagram of Embodiment 1 of the communication device provided by this embodiment. As shown in FIG. 9, the communication device 10 provided by this embodiment includes:

The obtaining module 11 is configured to obtain configuration information, where the configuration information is used to instruct a Packet Data Convergence Protocol PDCP entity to repeatedly send the first information;

The sending module 12 is configured to repeatedly send the first information to the second device according to the configuration information.

In a specific implementation of the foregoing embodiment, the sending module 12 includes: a PDCP entity,

When the first condition is met, the PDCP entity repeatedly sends the first information to the second device according to the configuration information;

or,

When the first condition is met, the sending module 12 activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information.

Optionally, the communication device 10 is implemented as a terminal device, and the second device is a network device, then the acquiring module 11 is specifically configured to:

Receiving the configuration information sent by the network device.

FIG. 10 is a schematic structural diagram of Embodiment 2 of the communication device provided by this embodiment. As shown in FIG. 10, on the basis of the foregoing embodiment, the communication device 10 provided in this embodiment further includes:

The processing module 13 is configured to configure a PDCP entity for each bearer according to the configuration information.

Optionally, the PDCP entity includes the transmission PDCP entity:

When the first condition is met, the transmitting PDCP entity repeatedly sends the first information to the second device according to the configuration information.

Optionally, the first condition includes at least one of the following:

Receive repeated packet transmission instructions from the network;

Re-send the activation instruction after receiving the packet from the network;

The number of repeated transmissions of packets received from the network;

The duration of repeated transmission of packets received from the network;

Re-send the activation time of the packet received from the network;

The activation time of repeated sending of packets received from the network;

The channel quality is less than or equal to the first preset threshold;

Meet the repeated sending time of the packet;

Satisfy the packet repeat sending condition.

Optionally, the configuration information includes at least one of the following:

The packet repeated sending instruction;

The packet repeatedly sends an activation instruction;

The number of times the packet is repeatedly sent;

The duration of repeated transmission of the packet;

The packet retransmission activation time;

The duration of repetitive transmission of the packet to activate;

The first preset threshold;

The second preset threshold value.

Optionally, the PDCP entity includes a receiving PDCP entity:

When the first condition is met, the receiving PDCP entity repeatedly sends at least one PDCP control PDU to the second device according to the configuration information; wherein the first information includes the at least one PDCP control PDU.

Optionally, the first condition includes at least one of the following:

Receiving a control PDU repeated transmission instruction from the network;

Receiving control PDUs from the network repeatedly sending activation instructions;

The number of repeated transmissions of control PDUs received from the network;

Receiving the control PDU retransmission activation time from the network;

The channel quality is less than or equal to the first preset threshold;

Meet the repeated transmission time of control PDU;

Meet the repeated transmission condition of the control PDU.

The control PDU repeated transmission instruction;

The control PDU repeatedly sends an activation instruction;

The number of repeated transmissions of the control PDU;

The duration of repeated transmission of the control PDU;

The control PDU repeated transmission activation time;

The activation duration of repeated transmission of the control PDU;

The first preset threshold;

The second preset threshold value.

In another implementation manner, when the first condition is met, the PDCP entity activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information. information;

Wherein, the first information includes at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.

Optionally, the first condition includes at least one of the following:

Received the activation instruction of the copy transmission from the network;

The number of replicated transmissions received from the network;

The activation time of receiving the copy transmission from the network;

The channel quality is less than or equal to the first preset threshold;

Meet the sending time of copy transmission;

Meet the sending conditions of the copy transmission.

The activation instruction of the copy transmission;

The number of said copy transmissions;

The activation time of the copy transmission;

The activation duration of the copy transmission;

The first preset threshold;

The second preset threshold value.

Optionally, the communication apparatus 10 may be implemented as a terminal device, and the second device is a network device; or,

The communication apparatus 10 may be implemented as a network device, and the second device is a terminal device; or,

The communication apparatus 10 may be implemented as a PDCP transmitting entity, and the second device is a PDCP receiving entity; or,

The communication apparatus 10 may be implemented as a receiving PDCP entity, and the second device is a transmitting PDCP entity.

Optionally, the sending module 12 is further configured to report location information to the network device, and the location information is used to determine the configuration information.

The communication device 10 provided by any of the foregoing embodiments is used to implement the technical solution on the first device side in any of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.

FIG. 11 is a schematic structural diagram of Embodiment 3 of the communication device provided in this embodiment. As shown in FIG. 11, the communication device 20 provided in this embodiment includes:

The receiving module 21 is configured to receive multiple pieces of first information repeatedly sent by the first device through the PDCP entity;

The processing module 22 is configured to process the multiple pieces of first information.

Optionally, the identifiers of the multiple pieces of first information are the same.

FIG. 12 is a schematic structural diagram of Embodiment 4 of the communication device provided by this embodiment. As shown in FIG. 12, the communication device 20 is implemented as a network device, the first device is a terminal device, and the communication device provided in this embodiment 20 also includes: a sending module 23;

The processing module 22 is further configured to determine configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information;

The sending module 23 is configured to send the configuration information to the terminal device.

Packet repeat sending instruction;

The packet repeats the activation instruction;

The number of repeated packet transmissions;

The duration of repeated packet transmission;

Packet retransmission activation time;

The activation duration of repeated packet transmission;

Control PDU repeated transmission indication;

Control PDU to repeatedly send activation instructions;

Control the number of repeated transmissions of PDU;

Control the duration of repeated transmission of PDUs;

Control PDU repeated transmission activation time;

Control the activation duration of repeated transmission of PDU;

Activation instructions for repeated transmissions;

The number of repeated transmissions;

The number of RLC entities and/or RLC entity identifiers used for repeated transmission;

The cell group identity corresponding to the RLC entity used for repeated transmission;

Activation time for repeated transmission;

The activation duration of repeated transmissions;

A first preset threshold, where the first preset threshold is a configured minimum threshold of channel quality;

A second preset threshold value, where the second preset threshold value is a configured maximum threshold value of a transmission delay between the first device and the second device.

Optionally, the processing module 22 is specifically configured to:

The configuration information is determined according to the location information of the terminal device.

Optionally, the receiving module 21 is further configured to:

Receiving the location information reported by the terminal device.

Optionally, the communication device 20 is implemented as a satellite, and the processing module 22 is specifically configured to:

The configuration information is determined according to the position information of the terminal device, the current position and the running track of the satellite.

Optionally, the processing module 22 is specifically configured to:

If multiple pieces of first information corresponding to the same identifier are received, the repeated first information is discarded.

Optionally, the first information includes at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.

The communication device 20 provided in any of the foregoing embodiments is used to implement the technical solution on the second device side in any of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.

FIG. 13 is a schematic structural diagram of the electronic device provided by this embodiment. As shown in FIG. 13, the electronic device 100 includes:

A processor 111, a memory 112, and an interface 113 for communicating with other electronic devices;

The memory 112 stores computer execution instructions;

The processor 110 executes the computer-executable instructions stored in the memory, so that the processor 111 executes the communication method of the first device or the second device in any of the foregoing embodiments.

Fig. 13 is a simple design of an electronic device. The embodiment of the present application does not limit the number of processors and memories in the user equipment. Fig. 13 only takes the number of 1 as an example for illustration.

In a specific implementation of the electronic device shown in FIG. 13, the memory, the processor, and the interface may be connected by a bus, or may be connected by other means. Optionally, the memory can be integrated inside the processor.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer-executable instruction, and when the computer-executable instruction is executed by a processor, it is used to implement the first method in any of the foregoing method embodiments. A solution on the terminal device side of the device or the sending end.

The embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer-executable instruction, and when the computer-executable instruction is executed by a processor, it is used to implement the first method in any of the foregoing method embodiments. Second, the network device side solution of the device or the receiving end.

An embodiment of the present application also provides a chip, including: a processing module and a communication interface, where the processing module is used to implement the solution on the terminal device side of the first device or the sending end in any of the foregoing method embodiments.

Further, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute any of the foregoing The technical solution of the first device side in the method embodiment.

An embodiment of the present application also provides a chip, including: a processing module and a communication interface, where the processing module is used to implement the network device-side solution of the second device or the receiving end in any of the foregoing method embodiments.

Further, the chip also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute any of the foregoing The technical solution of the second device side in the method embodiment.

The embodiment of the present application also provides a program, when the program is executed by the processor, it is used to implement the solution on the terminal device side of the first device or the sending end in any of the foregoing method embodiments.

The embodiment of the present application also provides a program, when the program is executed by the processor, it is used to implement the network device-side solution of the second device or the receiving end in any of the foregoing method embodiments.

Optionally, the foregoing processor may be a chip.

The embodiment of the present application also provides a computer program product, including program instructions, which are used to implement the solution on the terminal device side of the first device or the sending end in any of the foregoing method embodiments.

The embodiments of the present application also provide a computer program product, including program instructions, which are used to implement the network device-side solution of the second device or the receiving end in any of the foregoing method embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division, and there may be other divisions in actual implementation, for example, multiple modules can be combined or integrated. To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces. The indirect coupling or communication connection of the modules may be in electrical, mechanical or other forms.

In the specific implementation of any of the above devices, it should be understood that the processor can be a central processing unit (English: Central Processing Unit, abbreviated as: CPU), or other general-purpose processors or digital signal processors (English: Digital Signal Processor) , Abbreviation: DSP), application specific integrated circuit (English: Application Specific Integrated Circuit, abbreviation: ASIC), etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps in the method disclosed in this application can be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.

All or part of the steps in the foregoing method embodiments may be implemented by a program instructing relevant hardware. The aforementioned program can be stored in a readable memory. When the program is executed, it executes the steps of the above-mentioned method embodiments; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviated as: ROM), RAM, flash memory, hard disk, Solid state hard disk, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

Claims

A communication method, characterized in that it is applied to a first device, and the method includes:

Acquiring configuration information, where the configuration information is used to instruct a Packet Data Convergence Protocol PDCP entity to repeatedly send the first information;

According to the configuration information, the first information is repeatedly sent to the second device.
The method according to claim 1, wherein the repeatedly sending the first information to the second device according to the configuration information comprises:

When the first condition is met, the PDCP entity repeatedly sends the first information to the second device according to the configuration information;

or,

When the first condition is met, the copy transmission of the first information is activated, and/or the first information is repeatedly sent to the second device according to the configuration information.
The method according to claim 1 or 2, wherein the first device is a terminal device and the second device is a network device, then the obtaining configuration information includes:

Receiving the configuration information sent by the network device.
The method according to claim 3, wherein the method further comprises:

According to the configuration information, a PDCP entity is configured for each bearer.
The method according to any one of claims 2 to 4, wherein when the first condition is satisfied, the PDCP entity repeatedly sending the first information to the second device according to the configuration information comprises:

When the first condition is met, the transmitting PDCP entity repeatedly sends the first information to the second device according to the configuration information; wherein, the PDCP entity includes the transmitting PDCP entity.
The method according to claim 5, wherein the first condition includes at least one of the following:

Receiving an indication of repeated packet transmission from the network, or receiving an activation indication of repeated packet transmission from the network;

The number of repeated transmissions of packets received from the network;

The duration of repeated transmission of packets received from the network;

Re-send the activation time of the packet received from the network;

The activation time of repeated sending of packets received from the network;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the repeated sending time of the packet;

Satisfy the packet repeat sending condition.
The method according to claim 6, wherein the configuration information includes at least one of the following:

The packet retransmission instruction or the packet retransmission activation instruction;

The number of times the packet is repeatedly sent;

The duration of repeated transmission of the packet;

The packet retransmission activation time;

The duration of repetitive transmission of the packet to activate;

The first preset threshold;

The second preset threshold value.
The method according to any one of claims 2 to 4, wherein when a first condition is met, triggering a PDCP entity to repeatedly send the first information to the second device according to the configuration information comprises :

When the first condition is met, the receiving PDCP entity repeatedly sends at least one PDCP control PDU to the second device according to the configuration information; wherein, the PDCP entity includes the receiving PDCP entity, and the first information includes all At least one PDCP control PDU.
The method according to claim 8, wherein the first condition includes at least one of the following:

Receiving a control PDU repeated transmission instruction from the network;

Receiving control PDUs from the network repeatedly sending activation instructions;

The number of repeated transmissions of control PDUs received from the network;

The length of time when the control PDU is repeatedly sent from the network is received;

Receiving the control PDU retransmission activation time from the network;

Receiving the control PDU from the network to repeatedly send the activation time;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the repeated transmission time of control PDU;

Meet the repeated transmission condition of the control PDU.
The method according to claim 9, wherein the configuration information includes at least one of the following:

The control PDU repeated transmission instruction;

The control PDU repeatedly sends an activation instruction;

The number of repeated transmissions of the control PDU;

The duration of repeated transmission of the control PDU;

The control PDU repeated transmission activation time;

The activation duration of repeated transmission of the control PDU;

The first preset threshold;

The second preset threshold value.
The method according to any one of claims 2 to 4, wherein when the first condition is met, the copy transmission of the first information is activated, and/or, according to the configuration information, the The second device repeatedly sending the first information includes:

When the first condition is met, the PDCP entity activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information;

Wherein, the first information includes at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.
The method according to claim 11, wherein the first condition comprises at least one of the following:

Received the activation instruction of the copy transmission from the network;

The number of replicated transmissions received from the network;

Receive the number of RLC entities and/or RLC entity identifiers used for copy transmission from the network;

Receiving the cell group identifier corresponding to the RLC entity used for the replication transmission from the network;

The activation time of receiving the copy transmission from the network;

The activation time of receiving the copy transmission from the network;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the sending time of copy transmission;

Meet the sending conditions of the copy transmission.
The method according to claim 12, wherein the configuration information includes at least one of the following:

The activation instruction of the copy transmission;

The number of said copy transmissions;

The number of RLC entities and/or RLC entity identifiers used in the replication transmission;

The cell group identity corresponding to the RLC entity used for the replication transmission;

The activation time of the copy transmission;

The activation duration of the copy transmission;

The first preset threshold;

The second preset threshold value.
The method according to claim 1 or 2, characterized in that:

The first device is a terminal device, and the second device is a network device; or,

The first device is a network device, and the second device is a terminal device; or,

The first device is a PDCP transmitting entity, and the second device is a PDCP receiving entity; or,

The first device is a PDCP receiving entity, and the second device is a PDCP transmitting entity.
The method according to claim 3, wherein the method further comprises:

Reporting location information to the network device, where the location information is used to determine the configuration information.
A communication method, characterized in that it is applied to a second device, and the method includes:

Receiving multiple pieces of first information repeatedly sent by the first device through the PDCP entity of the Packet Data Convergence Protocol;

Processing the plurality of first information.
The method according to claim 16, wherein the identifiers of the multiple pieces of first information are the same.
The method according to claim 16 or 17, wherein the second device is a network device and the first device is a terminal device, the method further comprises:

Determining configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information;

Sending the configuration information to the terminal device.
The method according to claim 18, wherein the configuration information comprises at least one of the following:

Packet repeat sending instruction;

The packet repeats the activation instruction;

The number of repeated packet transmissions;

The duration of repeated packet transmission;

Packet retransmission activation time;

The activation duration of repeated packet transmission;

Control PDU repeated transmission indication;

Control PDU to repeatedly send activation instructions;

Control the number of repeated transmissions of PDU;

Control the duration of repeated transmission of PDUs;

Control PDU repeated transmission activation time;

Control the activation duration of repeated transmission of PDU;

Activation instructions for repeated transmissions;

The number of repeated transmissions;

The number of RLC entities and/or RLC entity identifiers used for repeated transmission;

The cell group identity corresponding to the RLC entity used for repeated transmission;

Activation time for repeated transmission;

The activation duration of repeated transmissions;

A first preset threshold, where the first preset threshold is a configured minimum threshold of channel quality;

A second preset threshold value, where the second preset threshold value is a configured maximum threshold value of a transmission delay between the first device and the second device.
The method according to claim 18 or 19, wherein the determining configuration information comprises:

The configuration information is determined according to the location information of the terminal device.
The method according to claim 20, wherein the method further comprises:

Receiving the location information reported by the terminal device.
The method according to claim 20 or 21, wherein the second device is a satellite, and the determining the configuration information according to the location information of the terminal device comprises:

The configuration information is determined according to the position information of the terminal device, the current position and the running track of the satellite.
The method according to any one of claims 16 to 22, wherein the processing the multiple pieces of first information comprises:

If multiple pieces of first information corresponding to the same identifier are received, the repeated first information is discarded.
The method according to any one of claims 16 to 23, wherein the first information includes at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.
A communication device, characterized in that it comprises:

An obtaining module, configured to obtain configuration information, where the configuration information is used to instruct a packet data convergence protocol PDCP entity to repeatedly send the first information;

The sending module is configured to repeatedly send the first information to the second device according to the configuration information.
The device according to claim 25, wherein the sending module comprises: a PDCP entity,

When the first condition is met, the PDCP entity repeatedly sends the first information to the second device according to the configuration information;

or,

When the first condition is met, the sending module activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information.
The device according to claim 26, wherein the communication device is implemented as a terminal device, and the second device is a network device, and the acquiring module is specifically configured to:

Receiving the configuration information sent by the network device.
The device according to claim 27, wherein the device further comprises:

The processing module is configured to configure a PDCP entity for each bearer according to the configuration information.
The apparatus according to any one of claims 26 to 28, wherein the PDCP entity comprises the transmitting PDCP entity:

When the first condition is met, the transmitting PDCP entity repeatedly sends the first information to the second device according to the configuration information.
The device according to claim 29, wherein the first condition comprises at least one of the following:

Receive repeated packet transmission instructions from the network;

Re-send the activation instruction after receiving the packet from the network;

The number of repeated transmissions of packets received from the network;

The duration of repeated transmission of packets received from the network;

Re-send the activation time of the packet received from the network;

The activation time of repeated sending of packets received from the network;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the repeated sending time of the packet;

Satisfy the packet repeat sending condition.
The device according to claim 30, wherein the configuration information comprises at least one of the following:

The packet repeated sending instruction;

The packet repeatedly sends an activation instruction;

The number of times the packet is repeatedly sent;

The duration of repeated transmission of the packet;

The packet retransmission activation time;

The duration of repetitive transmission of the packet to activate;

The first preset threshold;

The second preset threshold value.
The apparatus according to any one of claims 26 to 28, wherein the PDCP entity comprises a receiving PDCP entity:

When the first condition is met, the receiving PDCP entity repeatedly sends at least one PDCP control PDU to the second device according to the configuration information; wherein the first information includes the at least one PDCP control PDU.
The device according to claim 32, wherein the first condition comprises at least one of the following:

Receiving a control PDU repeated transmission instruction from the network;

Receiving control PDUs from the network repeatedly sending activation instructions;

The number of repeated transmissions of control PDUs received from the network;

The length of time when the control PDU is repeatedly sent from the network is received;

Receiving the control PDU retransmission activation time from the network;

Receiving the control PDU from the network to repeatedly send the activation time;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the repeated transmission time of control PDU;

Meet the repeated transmission condition of the control PDU.
The device according to claim 33, wherein the configuration information comprises at least one of the following:

The control PDU repeated transmission instruction;

The control PDU repeatedly sends an activation instruction;

The number of repeated transmissions of the control PDU;

The duration of repeated transmission of the control PDU;

The control PDU repeated transmission activation time;

The activation duration of repeated transmission of the control PDU;

The first preset threshold;

The second preset threshold value.
The device according to any one of claims 26 to 28, characterized in that:

When the first condition is met, the PDCP entity activates copy transmission of the first information, and/or repeatedly sends the first information to the second device according to the configuration information;

Wherein, the first information includes at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.
The device according to claim 35, wherein the first condition comprises at least one of the following:

Received the activation instruction of the copy transmission from the network;

The number of replicated transmissions received from the network;

Receive the number of RLC entities and/or RLC entity identifiers used for copy transmission from the network;

Receiving the cell group identifier corresponding to the RLC entity used for the replication transmission from the network;

The activation time of receiving the copy transmission from the network;

The activation time of receiving the copy transmission from the network;

The channel quality is less than or equal to the first preset threshold;

The transmission delay between the first device and the second device is greater than or equal to a second preset threshold;

Meet the sending time of copy transmission;

Meet the sending conditions of the copy transmission.
The device according to claim 36, wherein the configuration information comprises at least one of the following:

The activation instruction of the copy transmission;

The number of said copy transmissions;

The number of RLC entities and/or RLC entity identifiers used in the replication transmission;

The cell group identity corresponding to the RLC entity used for the replication transmission;

The activation time of the copy transmission;

The activation duration of the copy transmission;

The first preset threshold;

The second preset threshold value.
The device according to claim 25 or 26, wherein:

The communication apparatus may be implemented as a terminal device, and the second device is a network device; or,

The communication apparatus may be implemented as a network device, and the second device is a terminal device; or,

The communication apparatus may be implemented as a PDCP transmitting entity, and the second device is a PDCP receiving entity; or,

The communication apparatus may be implemented as a receiving PDCP entity, and the second device is a transmitting PDCP entity.
The apparatus according to claim 27, wherein the sending module is further configured to report location information to the network device, and the location information is used to determine the configuration information.
A communication device, characterized in that it comprises:

The receiving module is configured to receive multiple pieces of first information repeatedly sent by the first device through the PDCP entity of the Packet Data Convergence Protocol;

The processing module is configured to process the multiple pieces of first information.
The device according to claim 40, wherein the identifiers of the plurality of first information are the same.
The device according to claim 40 or 41, wherein the communication device is implemented as a network device, and the first device is a terminal device, the device further comprises: a sending module;

The processing module is further configured to determine configuration information, where the configuration information is used to instruct the PDCP entity to repeatedly send the first information;

The sending module is used to send the configuration information to the terminal device.
The device according to claim 42, wherein the configuration information comprises at least one of the following:

Packet repeat sending instruction;

The packet repeats the activation instruction;

The number of repeated packet transmissions;

The duration of repeated packet transmission;

Packet retransmission activation time;

The activation duration of repeated packet transmission;

Control PDU repeated transmission indication;

Control PDU to repeatedly send activation instructions;

Control the number of repeated transmissions of PDU;

Control the duration of repeated transmission of PDUs;

Control PDU repeated transmission activation time;

Control the activation duration of repeated transmission of PDU;

Activation instructions for repeated transmissions;

The number of repeated transmissions;

The number of RLC entities and/or RLC entity identifiers used for repeated transmission;

The cell group identity corresponding to the RLC entity used for repeated transmission;

Activation time for repeated transmission;

The activation duration of repeated transmissions;

A first preset threshold, where the first preset threshold is a configured minimum threshold of channel quality;

A second preset threshold value, where the second preset threshold value is a configured maximum threshold value of a transmission delay between the first device and the second device.
The device according to claim 42 or 43, wherein the processing module is specifically configured to:

The configuration information is determined according to the location information of the terminal device.
The device according to claim 44, wherein the receiving module is further configured to:

Receiving the location information reported by the terminal device.
The device according to claim 44 or 45, wherein the communication device is implemented as a satellite, and the processing module is specifically configured to:

The configuration information is determined according to the position information of the terminal device, the current position and the running track of the satellite.
The device according to any one of claims 40 to 46, wherein the processing module is specifically configured to:

If multiple pieces of first information corresponding to the same identifier are received, the repeated first information is discarded.
The device according to any one of claims 40 to 47, wherein the first information comprises at least one of the following information:

Preset the information on the bearer;

Information on each bearer;

Preset information on the PDCP entity;

Information on each PDCP entity;

PDCP status report;

Header compression feedback package;

PDCP data PDU.
An electronic device, characterized in that it comprises:

Processor, memory, and communication interface with other electronic devices;

The memory stores computer execution instructions;

The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 1 to 15.
An electronic device, characterized in that it comprises:

Processor, memory, and communication interface with other electronic devices;

The memory stores computer execution instructions;

The processor executes the computer-executable instructions stored in the memory, so that the processor executes the communication method according to any one of claims 16 to 24.
A computer-readable storage medium, wherein a computer-executable instruction is stored in the computer-readable storage medium, and when the computer-executable instruction is executed by a processor, it is used to implement any one of claims 1 to 15 The communication method mentioned.
A computer-readable storage medium, wherein a computer-executable instruction is stored in the computer-readable storage medium, and when the computer-executable instruction is executed by a processor, it is used to implement any one of claims 16 to 24. The communication method mentioned.
A chip, characterized by comprising: a processing module and a communication interface, the processing module being configured to execute the communication method according to any one of claims 1 to 15.
A chip, characterized by comprising: a processing module and a communication interface, the processing module being used to execute the communication method according to any one of claims 16 to 24.