CN115696612A

CN115696612A - Communication method, communication apparatus, and storage medium

Info

Publication number: CN115696612A
Application number: CN202110860288.XA
Authority: CN
Inventors: 谌丽; 皮埃尔
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2023-02-03

Abstract

The application provides a communication method, a communication device and a storage medium, wherein the method comprises the following steps: when a terminal autonomously activates PDCP repeated transmission, determining available uplink resources for PDCP repeated transmission; activating a target auxiliary RLC entity corresponding to a cell containing available uplink resources; and performing PDCP repeated transmission by adopting the target auxiliary RLC entity. Therefore, when the terminal autonomously activates the PDCP repeat transmission, the uplink resource for the PDCP repeat transmission is not required to be obtained in an interactive mode with the network equipment, the obtaining efficiency of the uplink resource for the PDCP repeat transmission is improved, and the PDCP repeat transmission is executed in time.

Description

Communication method, communication apparatus, and storage medium

Technical Field

The present application relates to the field of communications, and in particular, to a communication method, apparatus, and storage medium.

Background

In order to deal with the high-reliability Low-delay communication (URLLC) service with high requirements on delay and reliability, a Packet Data Convergence Protocol (PDCP) repeated transmission mechanism is introduced into the communication system. In the PDCP retransmission mechanism, the reliability of Data transmission is improved and the transmission delay is reduced by transmitting Protocol Data Units (PDUs) of the same PDCP layer through multiple paths.

In order to meet the requirements of time delay and reliability of URLLC service, the terminal can autonomously activate the PDCP repeated transmission mechanism under the conditions of data packet loss, data packet transmission errors and the like. The terminal autonomously activates a PDCP retransmission mechanism, and may Request an uplink resource for PDCP retransmission to the network device through a Scheduling Request (SR) procedure of the uplink shared resource.

However, the time consumed in the scheduling request process of the uplink shared resource is long, which causes that the terminal cannot transmit subsequent data packets in time according to the PDCP repeat transmission mode after autonomously activating the PDCP repeat transmission.

Disclosure of Invention

The application provides a communication method, a communication device and a storage medium, which are used for solving the problem that the overhead of time synchronization of a communication system is large.

In a first aspect, the present application provides a communication method, applied to a terminal, including:

the method comprises the steps that when a terminal autonomously activates PDCP repeated transmission, available uplink resources for the PDCP repeated transmission are determined;

activating a target auxiliary RLC entity corresponding to a cell containing available uplink resources;

and performing PDCP repeated transmission by adopting the target auxiliary RLC entity.

Optionally, when autonomously activating the PDCP retransmission, the terminal determines an available uplink resource for the PDCP retransmission, including:

when the terminal autonomously activates the PDCP repeated transmission, searching available uplink resources in the uplink resources of the target cell;

the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of the DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity and in an inactive state.

Optionally, the available uplink resource includes an uplink preconfigured resource or a dynamic scheduling resource, and the searching for the available uplink resource in the uplink resource of the target cell includes:

and searching the available uplink resource in the uplink resource of the target cell according to the LCP configuration and/or the uplink transmission priority configuration of the uplink pre-configured resource or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resource.

Optionally, searching for an available uplink resource in the uplink resource of the target cell according to the LCP configuration and/or the uplink transmission priority configuration of the uplink preconfigured resource, or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resource, includes:

determining candidate uplink resources in uplink resources of a target cell, wherein the candidate uplink resources conform to LCP (liquid Crystal protocol) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and activated logical channel data of an auxiliary RLC entity can be organized into the candidate uplink resources for transmission;

and determining available uplink resources in the candidate uplink resources.

Optionally, in the candidate uplink resources, determining an available uplink resource includes at least one of the following:

determining that the available uplink resources are uplink resources which can be skipped by the terminal before PDCP repeated transmission activation in the candidate uplink resources, and determining that the uplink resources which can be skipped are uplink resources which do not carry media access control service data units (MAC SDUs) corresponding to the DRBs before PDCP repeated activation;

determining the available uplink resource as the earliest available uplink resource in the candidate uplink resources;

determining the available uplink resource as the uplink resource with the minimum time delay in the candidate uplink resources;

determining the available uplink resources as the uplink resources with the lowest priority for bearing the logical channel data before PDCP repeated transmission activation in the candidate uplink resources;

and determining the available uplink resources as the uplink resources belonging to the cell of the authorized frequency band in the candidate uplink resources.

Optionally, when the terminal autonomously activates PDCP retransmission, the method includes:

when the terminal switches the PDCP repeated transmission from the inactive state to the active state;

or, the terminal activates more secondary RLC entities for PDCP repeated transmission in the active state.

Optionally, before determining the available uplink resource for PDCP retransmission, the communication method further includes:

receiving a first message from a network device, the first message being used for configuring PDCP retransmission for a terminal, the first message indicating at least one of:

whether the terminal is allowed to autonomously activate PDCP retransmission;

the number of secondary RLC entities allowed to be autonomously activated by the terminal;

an identifier of a secondary RLC entity that allows the terminal to activate autonomously;

and the terminal autonomously activates the priority of the logical channel corresponding to the auxiliary RLC entity when the PDCP is repeatedly transmitted.

Optionally, the target secondary RLC entity is adopted to perform PDCP retransmission, including:

in the target auxiliary RLC entity, PDCP repeated transmission is carried out on the uplink resources occupied by the logic channel data of which the logic channel priority is smaller than the priority threshold or the logic channel priority is smaller than the logic channel priority of the logic channel corresponding to the target auxiliary RLC entity.

Optionally, after performing PDCP retransmission by using the target secondary RLC entity, the communication method further includes:

receiving a second message from the network device, the second message indicating at least one of:

reallocating uplink resources to the target auxiliary RLC entity;

reallocating uplink resources for a logic channel occupied by the repeated transmission of the PDCP;

deactivating the PDCP repeat transmission.

In a second aspect, the present application provides a communication method, applied to a network device, including:

receiving uplink data from a terminal;

and if the uplink data comprises the logical channel data corresponding to the target auxiliary RLC entity which is autonomously activated by the terminal, determining that the PDCP which is autonomously activated by the terminal is repeatedly transmitted.

Optionally, before receiving uplink data from the terminal, the communication method further includes:

sending a first message to the terminal, the first message being used for configuring PDCP repeat transmission of the terminal, the first message indicating at least one of the following:

whether the terminal is allowed to autonomously activate PDCP retransmission;

the number of secondary RLC entities that the terminal is allowed to activate autonomously;

identification of a secondary RLC entity which allows the terminal to activate autonomously;

Optionally, after determining that the terminal has autonomously activated the PDCP retransmission, the communication method further includes:

sending a second message to the terminal, wherein the second message indicates at least one of the following:

reallocating uplink resources for the target auxiliary RLC entity;

reallocating uplink resources for the logic channel preempted by the PDCP repeated transmission;

deactivating the PDCP repeat transmission.

In a third aspect, the present application provides a communication device applied to a terminal, the communication device including a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

a processor for reading the computer program in the memory and performing the following operations:

activating a target secondary RLC entity corresponding to a cell containing available uplink resources;

Optionally, the processor further performs the following operations:

when the terminal autonomously activates the PDCP repeated transmission, searching for available uplink resources in the uplink resources of the target cell;

Optionally, the available uplink resource includes an uplink preconfigured resource or a dynamic scheduling resource, and the processor further performs the following operations:

and searching the available uplink resources in the uplink resources of the target cell according to the LCP configuration and/or the uplink transmission priority configuration of the uplink pre-configured resources or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resources.

Optionally, the processor further performs the following operations:

determining candidate uplink resources in uplink resources of a target cell, wherein the candidate uplink resources conform to LCP (liquid Crystal protocol) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and logical channel data of an activated auxiliary RLC entity can be organized into the candidate uplink resources for transmission;

and determining available uplink resources in the candidate uplink resources.

Optionally, the processor further performs at least one of the following operations:

determining that the available uplink resources are uplink resources which can be skipped by the terminal before PDCP repeated transmission activation in the candidate uplink resources, and determining that the uplink resources which can be skipped are uplink resources which do not carry MAC SDU corresponding to the DRB before PDCP repeated activation;

and determining the available uplink resource as the uplink resource belonging to the authorized frequency band cell in the candidate uplink resources.

Optionally, when the terminal autonomously activates PDCP repeated transmission, the method includes:

Optionally, the processor further performs the following operations:

receiving a first message from a network device, the first message being used for configuring PDCP duplicate transmission of a terminal, the first message indicating at least one of:

whether the terminal is allowed to autonomously activate PDCP retransmission;

Optionally, the processor further performs the following operations:

reallocating uplink resources for the target auxiliary RLC entity;

reallocating uplink resources for a logic channel occupied by PDCP repeated transmission;

deactivating the PDCP repeat transmission.

In a fourth aspect, the present application provides a communication apparatus applied to a network device, where the communication apparatus includes a memory, a transceiver, and a processor:

a memory for storing a computer program;

a transceiver for transceiving data under the control of the processor;

receiving uplink data from a terminal;

Optionally, the processor further performs the following operations:

whether the terminal is allowed to autonomously activate PDCP retransmission;

Optionally, the processor further performs the following operations:

sending a second message to the terminal, the second message indicating at least one of:

reallocating uplink resources to the target auxiliary RLC entity;

deactivating the PDCP repeat transmission.

In a fifth aspect, the present application provides a communication apparatus, applied to a terminal, including:

a processing unit, configured to determine an available uplink resource for PDCP retransmission and activate a target secondary RLC entity corresponding to a cell including the available uplink resource when a terminal autonomously activates PDCP retransmission;

and the receiving and sending unit is used for carrying out PDCP repeated transmission by adopting the target auxiliary RLC entity.

Optionally, the processing unit is specifically configured to:

Optionally, the available uplink resource includes an uplink preconfigured resource or a dynamic scheduling resource, and the processing unit is specifically configured to:

Optionally, the processing unit is specifically configured to:

and determining available uplink resources in the candidate uplink resources.

Optionally, the processing unit is specifically configured to at least one of:

determining that the available uplink resources are the uplink resources which can be skipped by the terminal before PDCP repeated transmission activation in the candidate uplink resources, and determining that the uplink resources which can be skipped are the uplink resources which do not carry the MAC SDU corresponding to the DRB before PDCP repeated transmission activation;

determining the available uplink resources as the uplink resources with the lowest priority for carrying the logical channel data before the PDCP repeated transmission activation in the candidate uplink resources;

Optionally, the transceiver unit is further configured to:

whether the terminal is allowed to autonomously activate PDCP retransmission;

Optionally, the transceiver unit is specifically configured to:

Optionally, the transceiver unit is further configured to:

reallocating uplink resources for the target auxiliary RLC entity;

deactivating the PDCP repeat transmission.

In a sixth aspect, the present application provides a communication apparatus, applied to a network device, including:

a receiving and transmitting unit, configured to receive uplink data from a terminal;

and the processing unit is used for determining that the terminal autonomously activates PDCP repeated transmission if the uplink data contains logical channel data corresponding to the target auxiliary RLC entity autonomously activated by the terminal.

Optionally, the transceiver unit is further configured to:

whether the terminal is allowed to autonomously activate PDCP retransmission;

Optionally, the transceiver unit is further configured to:

reallocating uplink resources to the target auxiliary RLC entity;

deactivating the PDCP repeat transmission.

In a seventh aspect, the present application provides a processor-readable storage medium storing a computer program for causing a processor to execute the communication method according to the first or second aspect.

In an eighth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the communication method according to the first or second aspect.

In a ninth aspect, the present application provides a communication system, comprising the terminal as described in any above and the network device as described in any above, wherein the terminal performs the communication method as described in the first aspect, and the network device performs the communication method as described in the second aspect.

In the communication method, the communication device and the storage medium, when a terminal autonomously activates PDCP retransmission, the terminal does not need to obtain uplink resources for PDCP retransmission in an interactive manner with a network device, but can directly determine available uplink resources for PDCP retransmission at the terminal side, and performs PDCP retransmission by using a target secondary RLC entity corresponding to a cell including the available uplink resources, thereby ensuring that the terminal can execute PDCP retransmission in time after autonomously activating PDCP retransmission.

It should be understood that what is described in the summary above is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

Fig. 1 (a) is a schematic diagram of a PDCP retransmission model under CA;

fig. 1 (b) is a schematic diagram of a PDCP repetition transmission model at DC;

fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present application;

fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a communication method according to another embodiment of the present application;

fig. 5 is a flowchart illustrating a communication method according to another embodiment of the present application;

fig. 6 is an exemplary diagram of the terminal selecting CG type1 for PDCP retransmission;

fig. 7 is a flowchart illustrating a communication method according to another embodiment of the present application;

fig. 8 is an exemplary diagram of the terminal selecting CG type2 for PDCP retransmission;

fig. 9 is a flowchart illustrating a communication method according to another embodiment of the present application;

FIG. 10 is a diagram illustrating an example of a terminal selecting a dynamic scheduling resource for PDCP retransmission;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a communication device according to another embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to another embodiment of the present application.

Detailed Description

The term "and/or" in this application describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

To deepen understanding of the technical solution of the present application, PDCP repetition transmission will be explained first briefly.

Referring to fig. 1 (a) and fig. 1 (b), fig. 1 (a) is a schematic diagram of a PDCP repeated transmission model under Carrier Aggregation (CA), and fig. 1 (b) is a schematic diagram of a PDCP repeated transmission model under Dual Connectivity (DC). In fig. 1 (a) and 1 (b), the number of duplicate transmission paths for PDCP duplicate transmission is taken as an example of 4.

As shown in fig. 1 (a) and fig. 1 (b), one Data Radio Bearer (DRB) of the PDCP layer corresponds to one PDCP entity, and is respectively transmitted through 4 Logical Channels (LCHs) in a Radio Link management (RLC) layer, where each Logical Channel corresponds to one RLC entity. For example, in fig. 1 (a) and 1 (b), the PDCP entity corresponds to 4 RLC entities: the system comprises RLC1, RLC2, RLC3 and RLC4, wherein each RLC entity corresponds to a logical channel LCH1, LCH2, LCH3 and LCH4 respectively. As shown in fig. 1 (a), in the PDCP retransmission model of CA, a plurality of logical channels corresponding to a DRB that is repeatedly transmitted are handled by one MAC entity at a Medium Access Control (MAC) layer. As shown in fig. 1 (b), in the PDCP retransmission model of DC, a plurality of logical channels corresponding to DRBs retransmitted by different nodes are mapped to respective MAC entities of the nodes for transmission. In the DC, different nodes include a Master Node (Master Node, main Node or Primary Node, MN or PN) or a Secondary Node (SN).

As shown in fig. 1 (a) and fig. 1 (b), the same PDCP entity corresponds to different RLC entities, and data of logical channels corresponding to different RLC entities are mapped to different cells (i.e., different carriers) for transmission. In other words, there is a correspondence between RLC entities and cells, and different RLC entities correspond to different cells. For example, RLC1, RLC2, RLC3, and RLC4 correspond to cells cell1 (CC 1), cell2 (CC 2), cell3 (CC 3), and cell4 (CC 4), respectively.

Before PDCP repeated transmission activation, the RLC entity carrying DRB data is called a primary RLC entity, and a corresponding logical channel is a primary logical channel, which cannot be deactivated. After PDCP retransmission, an RLC entity for transmitting a duplicated PDCP Protocol Data Unit (PDU) is called an auxiliary RLC entity, and a corresponding logical channel is an auxiliary logical channel.

Generally, when a network device activates PDCP retransmission, if the secondary RLC entity has data, uplink resources are allocated to the secondary RLC entity, so as to implement actual implementation of uplink DRB PDCP retransmission. For URLLC service, considering that the network equipment cannot send the repeated transmission activation command and allocate uplink resources in time, the terminal autonomously activates PDCP repeated transmission. When the terminal autonomously activates the PDCP retransmission, the network device does not know that the terminal activates the PDCP retransmission, and the terminal needs to request the network device for the uplink resource for the PDCP retransmission through the SR process of the uplink shared resource, and the network device knows that the terminal activates the PDCP retransmission and performs allocation of the uplink resource. In the above process, it is difficult for the network device to allocate uplink resources to the terminal in time, and then the terminal cannot obtain the uplink resources in time after autonomously activating PDCP retransmission, and cannot execute PDCP retransmission in time.

In order to solve the above problem, embodiments of the present application provide a communication method, an apparatus, and a storage medium, where when a terminal autonomously activates PDCP retransmission, an available uplink resource for PDCP retransmission is determined, a target secondary RLC entity corresponding to a cell including the available uplink resource is activated, and the target secondary RLC entity is used to perform PDCP retransmission. Therefore, the terminal side determines the uplink resource for the PDCP repeated transmission without interacting with the network equipment to request the uplink resource for the PDCP repeated transmission after the autonomous activation, and activates the corresponding auxiliary RLC entity to realize the timely execution of the PDCP repeated transmission.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not described again.

The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, suitable systems may be global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) systems, long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, long term evolution (long term evolution) systems, LTE-a systems, universal mobile systems (universal mobile telecommunications systems, UMTS), universal internet Access (world interoperability for microwave Access (WiMAX) systems, new Radio interface (NR) systems, etc. These various systems include terminals and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of terminals may be different, for example, in a 5G system, a terminal may be called a User Equipment (UE). A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless terminal may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for providing services to a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The network device and the terminal may each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission, and the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of root antenna combinations.

Referring to fig. 2, fig. 2 is a schematic diagram of an application scenario provided in this embodiment, and this embodiment provides a communication system, where the communication system includes a network device 210 and a terminal 220 (fig. 2 takes 3 terminals as an example). In the communication system, the terminal 220 autonomously activates the DRB PDCP retransmission to perform the retransmission of the data packet and ensure the correct transmission of the data when the data packet is lost or the data packet is erroneously transmitted.

Referring to fig. 3, fig. 3 is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 3, the method of this embodiment may include:

s301, when the terminal autonomously activates the PDCP repeated transmission, the terminal determines the available uplink resources for the PDCP repeated transmission.

In this embodiment, for example, when a logical channel of the main RLC entity corresponding to the PDCP entity corresponding to the DRB is lost, and transmission fails, the terminal may determine to autonomously activate PDCP retransmission. Here, the trigger condition of the PDCP duplicate transmission scheme is not limited. When the terminal autonomously activates the PDCP retransmission, the terminal may determine an uplink resource that can be used for the PDCP retransmission, that is, an available uplink resource for the PDCP retransmission, in the uplink resource of the cell in which the terminal is located.

The method comprises the steps that when a terminal autonomously activates PDCP repeated transmission, available uplink resources for the PDCP repeated transmission are determined, wherein the available uplink resources for the PDCP repeated transmission are determined while the terminal autonomously activates the PDCP repeated transmission; it is also possible that the terminal determines available uplink resources for PDCP repetition transmission after autonomously activating the PDCP repetition transmission. Because the available uplink resources for the PDCP repeated transmission are determined without back-and-forth interaction with the network equipment, the available uplink resources for the PDCP repeated transmission are determined after the terminal autonomously activates the PDCP repeated transmission, and the execution efficiency of the PDCP repeated transmission after the PDCP repeated transmission is autonomously activated can be effectively improved.

Optionally, the autonomously activating PDCP repeated transmission by the terminal includes: the terminal switches the PDCP repeated transmission from the inactive state to the active state, or activates more secondary RLC entities for the PDCP repeated transmission in the active state. Therefore, the embodiment can realize the timely execution of the PDCP repeated transmission after the PDCP repeated transmission under different activation conditions of the PDCP repeated transmission.

Therefore, in one possible implementation manner of S301, when the terminal switches the PDCP repeated transmission from the inactive state to the active state, the available uplink resources for the PDCP repeated transmission are determined. Or, when the terminal activates more secondary RLC entities for PDCP retransmission in an activated state, determining available uplink resources for PDCP retransmission. When the PDCP repeated transmission is in an activated state, the PDCP PDU is transmitted through a logic channel corresponding to the main RLC entity, and when the PDCP repeated transmission is in an inactivated state, the PDCP PDU and the copied PDCP PDU are transmitted through the logic channels corresponding to the main RLC entity and the part of the auxiliary RLC entities respectively.

In another possible implementation manner of the foregoing S301, when the terminal autonomously activates PDCP retransmission, the terminal searches for an available uplink resource in the uplink resources of the target cell. The target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of the DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of the DRB to be repeatedly transmitted and in an inactive state. Therefore, based on the characteristic that the duplicated PDCP PCU in the PDCP retransmission is transmitted by the logical channel corresponding to the activated secondary RLC entity, the available uplink resource for the PDCP retransmission is determined in the uplink resource of the cell corresponding to the secondary RLC entity, or further, in the uplink resource of the cell corresponding to the secondary RLC entity in the inactive state.

Therefore, the cells corresponding to the RLC entities corresponding to the PDCP entity of the DRB to be repeatedly transmitted are all cells, and when the terminal activates the inactive PDCP repeat transmission, the terminal may determine that the target cell is a cell other than the cell corresponding to the main RLC entity. Or, when the activated PDCP repeatedly transmits and activates more secondary RLC entities, the terminal may determine that the target cell is a cell other than a cell corresponding to the primary RLC entity, or determine that the target cell is a cell other than a cell corresponding to the primary RLC entity and a cell corresponding to the activated secondary RLC entity.

In another possible implementation manner of the foregoing S301, the available uplink resource for PDCP repeated transmission includes an uplink pre-Configured resource (CG) or a Dynamic scheduling resource (DG). Therefore, the available uplink resources for the PDCP repeated transmission can be searched in the uplink pre-configuration resources or the dynamic scheduling resources of the target cell, and the diversity and richness of the available uplink resources for the PDCP repeated transmission are improved.

In the process of determining the available uplink resource, the available uplink resource for PDCP repeated transmission may be searched in the uplink resource of the target cell according to Logical Channel Priority (LCP) configuration of the uplink pre-configured resource and/or uplink transmission priority configuration, or according to LCP configuration of the dynamic scheduling resource and/or uplink transmission priority configuration. Specifically, the uplink pre-configured resource that can be used for PDCP repeated transmission, that is, the uplink resource, can be searched in the uplink pre-configured resource of the target cell according to the LCP configuration of the uplink pre-configured resource and/or the uplink transmission priority configuration of the uplink pre-configured resource. Or, according to the LCP configuration of the dynamic scheduling resource and/or the uplink transmission priority configuration of the dynamic scheduling resource, the dynamic scheduling resource that can be used for PDCP repeated transmission, that is, the available uplink resource, is searched in the dynamic scheduling resource of the target cell. Therefore, the searching of the uplink resources is restricted through LCP configuration and uplink transmission priority configuration, and the availability and the reasonability of the searched uplink resources are ensured.

Optionally, the process of searching for an available uplink resource for PDCP retransmission in the uplink resource of the target cell according to the LCP configuration and/or uplink transmission priority configuration of the uplink preconfigured resource, or according to the LCP configuration and/or uplink transmission priority configuration of the dynamic scheduling resource, includes: firstly, determining candidate uplink resources in uplink resources of a target cell, wherein the candidate uplink resources conform to LCP configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or the candidate uplink resources conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and the candidate uplink resources conform to LCP configuration and/or uplink transmission priority configuration, which means that logical channel data of an activated secondary RLC entity can be organized into the candidate uplink resources for transmission; next, among the candidate uplink resources, an available uplink resource for PDCP duplicate transmission is determined. Therefore, under the constraint based on the LCP configuration and/or the uplink transmission priority configuration, the uplink pre-configured resource or the dynamic scheduling resource that can be used for transmitting the data of the logical channel corresponding to the secondary RLC entity is obtained, and then, the uplink pre-configured resource or the dynamic scheduling resource (i.e., the candidate uplink resource) may be directly determined as the available uplink resource, or the candidate uplink resource may be further screened, so as to further improve the rationality of the available uplink resource.

Optionally, determining an available uplink resource from the candidate uplink resources includes at least one of: determining that the available uplink resources are candidate uplink resources, wherein the terminal determines that (skip) uplink resources can be skipped before PDCP (packet data convergence protocol) repeated transmission is activated; determining the available uplink resource as the uplink resource with the minimum time delay in the candidate uplink resources; determining the available uplink resources as the uplink resources with the lowest priority for carrying the logical channel data before the PDCP repeated transmission activation in the candidate uplink resources; and determining the available uplink resources as the uplink resources belonging to the cell of the authorized frequency band in the candidate uplink resources. Therefore, the available uplink resources suitable for the PDCP repeated transmission are selected from the candidate uplink resources in one or more aspects, such as time delay, stability and the like of transmission, and the communication efficiency, the communication quality and the like of the PDCP repeated transmission are improved as much as possible.

The terminal determines that a skipped uplink resource is an uplink resource that does not carry a MAC Service Data Unit (SDU) corresponding to a DRB before PDCP retransmission activation, in other words, the skipped uplink resource does not carry any MAC SDU corresponding to a DRB before the terminal autonomously activates PDCP retransmission, and if it is determined that a candidate uplink resource is the skipped uplink resource, the uplink resource does not carry MAC SDUs corresponding to other DRBs except the DRB to be retransmitted after PDCP retransmission activation. The terminal determines the uplink resources which can be skipped before the PDCP repeat transmission is activated in the process of determining the available uplink resources as the candidate uplink resources, so that the phenomenon that the PDCP repeat transmission affects the transmission of other DRBs except the DRB to be repeatedly transmitted can be avoided.

The uplink resource with the minimum time delay in the candidate uplink resources refers to the uplink resource with the minimum uplink transmission time delay in the candidate uplink resources. And determining the available uplink resource as the uplink resource with the minimum time delay in the candidate uplink resources, which is beneficial to improving the transmission efficiency of the PDCP repeated transmission.

The available uplink resources are determined to be the uplink resources with the lowest priority for bearing the logical channel data before PDCP repeated transmission activation in the candidate uplink resources, so that the phenomenon that the PDCP repeated transmission influences the transmission of the logical channel data with higher priority is avoided, and the influence on terminal communication is avoided.

Compared with an unlicensed frequency band cell, the reliability of the licensed frequency band cell is higher. Therefore, the available uplink resource is determined to belong to the uplink resource of the authorized frequency band cell, so that the reliability of the available uplink resource is improved, and the reliability of the PDCP repeated transmission is improved.

S302, the terminal activates a target auxiliary RLC entity corresponding to a cell containing available uplink resources.

In this embodiment, in the PDCP repeat transmission model, data of logical channels corresponding to different RLC entities are mapped to different cells for transmission, and after determining available uplink resources for PDCP repeat transmission, data of a logical channel corresponding to a secondary RLC entity corresponding to a cell including the available uplink resources may be transmitted on the available uplink resources. Therefore, after determining the available uplink resources for PDCP retransmission, the secondary RLC entity corresponding to the cell containing the available uplink resources may be activated, and for convenience of description, the secondary RLC entity corresponding to the cell containing the available uplink resources is referred to as a target secondary RLC entity. The activated target secondary RLC entity is used for PDCP duplicate transmission.

S303, the terminal adopts the target auxiliary RLC entity to carry out PDCP repeated transmission.

In this embodiment, after the target secondary RLC entity is activated, the target secondary RLC entity is adopted, and the logical channel data including the copied PDCP PDU is sent to the network device on the available uplink resource for PDCP retransmission in the cell corresponding to the target secondary RLC entity determined in the above step, so as to implement PDCP retransmission. Therefore, the network equipment does not need to request to allocate uplink resources for PDCP repeat transmission after the target auxiliary RLC entity is activated, and the network equipment waits for the allocation of the uplink resources for PDCP repeat transmission, so that the problem that the terminal cannot execute PDCP repeat transmission in time due to the fact that the network equipment does not know that the terminal autonomously activates PDCP repeat transmission and cannot allocate the uplink resources in time after the terminal autonomously activates PDCP repeat transmission is solved, and the terminal can perform PDCP repeat transmission on the available uplink resources in time after the target auxiliary RLC entity is activated, namely after the PDCP repeat transmission is activated.

In a possible implementation manner of the foregoing S303, it is considered that the available uplink resource is not an uplink resource that is exclusively allocated by the network device to the terminal for PDCP repeated transmission, and the available uplink resource is used for transmission of other logical channel data and is occupied by other logical channel data. Therefore, the terminal can perform PDCP retransmission on the uplink resource occupied by the logical channel data having a logical channel priority less than the priority threshold in the target secondary RLC entity, or on the uplink resource occupied by the logical channel data having a logical channel priority less than the logical channel priority of the logical channel corresponding to the target secondary RLC entity. In other words, the terminal can preempt the uplink resources occupied by the logical channel data with lower logical channel priority and perform PDCP retransmission. Therefore, the PDCP repeated transmission is realized, and the phenomenon that the PDCP repeated transmission influences the transmission of the logical channel data with higher logical channel priority is avoided.

Referring to fig. 4, fig. 4 is a flowchart illustrating a communication method according to another embodiment of the present application. As shown in fig. 4, the method of this embodiment may include:

s401, when the terminal activates the PDCP repeated transmission autonomously, the terminal determines the available uplink resources for the PDCP repeated transmission.

S402, the terminal activates a target auxiliary RLC entity corresponding to the cell containing the available uplink resources.

S403, the terminal adopts the target auxiliary RLC entity to carry out PDCP repeated transmission.

The implementation principle and the technical effect of S401 to S403 may refer to the foregoing embodiments, and are not described again.

S404, if the network equipment receives the logical channel data corresponding to the target auxiliary RLC entity which is autonomously activated by the terminal in the uplink data from the terminal, the network equipment determines that the PDCP which is autonomously activated by the terminal is repeatedly transmitted.

In this embodiment, in PDCP repeat transmission, the terminal may send uplink data to the network device by using an uplink resource through the primary RLC entity and the activated secondary RLC entity corresponding to the PDCP entity of the DRB to be repeatedly transmitted. After receiving uplink data, under the condition that the PDCP is in an inactivated state before repeated transmission, if the uplink data contains logical channel data corresponding to the auxiliary RLC entity, or if the network equipment receives the logical channel data corresponding to the auxiliary RLC entity, the network equipment determines that the terminal has autonomously activated the PDCP repeated transmission; under the condition that the PDCP entity is in an active state before the PDCP retransmission, if the uplink data includes logical channel data corresponding to a new secondary RLC entity, or if the network device receives the logical channel data corresponding to the new secondary RLC entity, the network device determines that the terminal has autonomously activated the PDCP retransmission.

Therefore, when the terminal autonomously activates the repeated PDCP transmission, the terminal determines the available uplink resources which can be used for the repeated PDCP transmission on one side of the terminal, activates the target auxiliary RLC entity corresponding to the cell containing the available uplink resources, and adopts the target auxiliary RLC entity to realize the timely execution of the repeated PDCP transmission. In the process of performing PDCP retransmission, the network device knows that the terminal has autonomously activated PDCP retransmission based on uplink data from the terminal. The efficiency of repeated transmission of PDCP is effectively improved.

In some embodiments, as shown in fig. 4, the communication method may further include: s400, the terminal receives a first message from the network equipment, wherein the first message is used for configuring PDCP repeat transmission of the terminal. Wherein the first message may indicate at least one of: whether the terminal is allowed to autonomously activate the PDCP repeated transmission, the number of the auxiliary RLC entities which are allowed to be autonomously activated by the terminal, the identification of the auxiliary RLC entities which are allowed to be autonomously activated by the terminal, and the priority of the logical channel corresponding to the auxiliary RLC entities when the terminal autonomously activates the PDCP repeated transmission. Thus, the network device can flexibly configure autonomous activation of PDCP duplicate transmissions of the terminal.

The network device may send the first message at any time, and in particular, the network device sends the first message to the terminal when determining that the transmission reliability of the corresponding DRB needs to be improved, where S400 is located before S401 in fig. 4 as an example, but not limited to that S400 is located before S401. The first message may be Radio Resource Control (RCC) signaling. In the case that the network device is configured to allow the terminal to autonomously activate PDCP duplicate transmission, the terminal may perform the operations of autonomously activating PDCP duplicate transmission, determining available uplink resources, activating the secondary RLC entity, performing PDCP duplicate transmission, and the like in the foregoing embodiments. When the network device configures the number of secondary RLC entities that the terminal is allowed to activate autonomously, the terminal may determine, under the constraint of the number, the number of target secondary RLC entities corresponding to the cell including the available uplink resource. When the network device configures the identifier of the secondary RLC entity that allows the terminal to autonomously activate, that is, configures which secondary RLC entities that the terminal is allowed to autonomously activate, the terminal can determine the target secondary RLC entity within the range of the secondary RLC entities.

The network equipment configures the priority of the logical channel corresponding to the auxiliary RLC entity when the terminal autonomously activates the PDCP repeat transmission through the first message, so that the priority of the logical channel corresponding to the auxiliary RLC entity when the terminal autonomously activates the PDCP repeat transmission is different from the priority of the logical channel corresponding to the auxiliary RLC entity before the PDCP repeat transmission is autonomously activated. The priority configuration of the logical channel corresponding to the auxiliary RLC entity can adapt to the actual requirement of repeated transmission, and the configuration flexibility and diversity of the PDCP repeated transmission are improved.

In some embodiments, as shown in fig. 4, after S404, the communication method further includes: s405, the network equipment sends a second message to the terminal, wherein the second message indicates at least one of the following items: reallocating uplink resources for the target secondary RLC entity, reallocating uplink resources for a logical channel occupied by the PDCP repeated transmission, and deactivating (deactivating) the PDCP repeated transmission. Therefore, after the network equipment determines that the terminal autonomously activates the PDCP repeated transmission, the control terminal deactivates the PDCP repeated transmission so as to flexibly control the PDCP repeated transmission; and/or, allocating uplink resources for the next PDCP repeat transmission to ensure the execution of the subsequent PDCP repeat transmission; and/or, considering that uplink resources in a cell are occupied for timely executing the PDCP repeated transmission in the process of autonomously activating the PDCP repeated transmission by the terminal, the network equipment allocates the uplink resources for the logic channel of the resources occupied by the PDCP repeated transmission, and the influence of the PDCP repeated transmission on other data transmission is reduced and compensated as much as possible.

Wherein, under the condition that the available uplink resource includes an uplink pre-configured resource or a dynamic scheduling resource, the network device indicates to reallocate the uplink resource for the target secondary RLC entity through the second message, including: and the network equipment indicates the target secondary RLC entity to reallocate the uplink pre-configured resources through the second message, or indicates the target secondary RLC entity to reallocate the dynamic scheduling resources through the second message. The network equipment indicates to reallocate the uplink resource for the logical channel occupied by the PDCP repeated transmission through the second message, including: the network equipment indicates the logical channel occupied by the PDCP repeated transmission to be reallocated with the uplink pre-configuration resource through the second message, and the network equipment indicates the logical channel occupied by the PDCP repeated transmission to be reallocated with the dynamic scheduling resource through the second message.

Optionally, in addition to the network device instructing the terminal to deactivate PDCP retransmission through the second message, the terminal may also autonomously deactivate PDCP retransmission.

Based on that the available uplink resources include uplink preconfigured resources or dynamic scheduling resources, the uplink preconfigured resources include CG type1 and CG type2, and subsequently, multiple embodiments of the present application are provided in multiple aspects of CG type1, CG type2, and dynamic scheduling resources.

The CG type1 is a period, a starting point, time-frequency domain resources, and a transmission format, where the period, the starting point, the time-frequency domain resources, and the transmission format are directly allocated to a network device when uplink resources are preconfigured, and the transmission format includes, for example, a Modulation and Coding Scheme (MCS) and a Redundancy Version (RV). CG type2 is that the network device only configures a preconfigured resource period when the network device preconfigured uplink resources, and the network device subsequently allocates a starting point of the preconfigured resources, time-frequency domain resources, and transport formats with a Physical Downlink Control Channel (PDCCH) scheduling command and deactivates with the PDCCH scheduling command. In the dynamic scheduling, a network device uses a PDCCH to carry a Downlink Control Information (DCI), the DCI carries resource allocation Information, a terminal performs data transmission and reception based on the resource allocation, and the dynamic scheduling is effective once.

Referring to fig. 5, fig. 5 is a flowchart illustrating a communication method according to another embodiment of the present application, in which a terminal autonomously selects CG type1 for terminal-autonomously activated PDCP repeated transmission. As shown in fig. 5, the method of this embodiment may include:

s501, the network equipment configures PDCP repeated transmission of the DRB to the terminal.

The network device may configure PDCP retransmission of one or more DRBs to the terminal, and may configure the DRBs through the first message, which may specifically refer to the foregoing embodiments and is not described again.

S502, when triggering the PDCP repeat transmission condition of the self-activated target DRB, the terminal determines a target CG type1 for PDCP repeat transmission and activates a target auxiliary RLC entity corresponding to a cell containing the target CG type 1.

The target DRB is a DRB which is currently autonomously activated to perform PDCP retransmission, that is, a DRB to be retransmitted in the foregoing embodiment. The terminal triggers PDCP duplicate transmission conditions, such as: when the terminal receives a data transmission error message (such as a HARQ NACK message) aiming at the uplink transmission containing the target DRB, the PDCP repeated transmission is autonomously activated. The method for determining the available uplink resources for PDCP retransmission may be implemented in the foregoing embodiment, and the target CG type1 for PDCP retransmission is determined in the CG type1 of the target cell.

S503, the terminal sends the subsequent data packet of the target DRB to the network equipment on the target CG type1 or according to the scheduling of the network equipment by adopting the target auxiliary RLC entity and according to the activated PDCP repeated transmission mode.

In this embodiment, after the terminal performs PDCP retransmission on the target CG type1, the subsequent data packets may be repeatedly transmitted according to the scheduling of the network device, for example, after the network device determines that the terminal autonomously activates PDCP retransmission, the network device may allocate CG type1, CG type2 or dynamic scheduling resources to the secondary RLC entity corresponding to the cell including the target CG type 1.

S504, when the network equipment analyzes the uplink data containing the data of the target auxiliary RLC entity logical channel from the uplink data of the terminal, the terminal is determined to autonomously activate uplink transmission.

The implementation principle and the technical effect of S504 may refer to the foregoing embodiments, and are not described again.

After S504, optionally, the network device allocates the uplink resource for a logical channel corresponding to the secondary RLC entity activated by the terminal and/or a logical channel in which the PDCP repeatedly transmits and preempts the uplink resource.

After S504, optionally, the network device determines that the terminal autonomously deactivates PDCP retransmission according to data subsequently sent by the terminal, or the network device instructs the terminal to deactivate PDCP retransmission.

Referring to fig. 6, fig. 6 is an exemplary diagram of a terminal selecting CG type1 for PDCP repetition transmission. As shown in fig. 6, the network device configures 3 DRBs for the terminal, which are DRB1, DRB2, and DRB3.

As shown in fig. 6, for DRB1, the network device configures PDCP duplicate transmission of DRB 1. The PDCP entity corresponding to the DRB1 is PDCP1, the corresponding RLC entities when the PDCP of the DRB1 is repeatedly transmitted are RLC11, RLC12 and RLC13 respectively, and the cells corresponding to the RLC11, the RLC12 and the RLC13 are CC1, CC2 and CC3 respectively. The RLC11 corresponds to the logical channel LCH11, and can only transmit on CC1 when activating repeated transmission; RLC12 corresponds to the logical channel LCH12 and can only transmit on CC2 when repeated transmission is activated; RLC13 corresponds to the logical channel LCH13 and can only transmit on CC3 when repeated transmission is activated. RLC11 is the main RLC entity, LCH11 is the main RLC channel, RLC11 and LCH11 are always activated; RLC12 and RLC13 are secondary RLC channels and may be deactivated. Where fig. 6 is a DC scenario with CC1 on MN and CC2 and CC3 on SN.

As shown in fig. 6, the network device does not configure PDCP duplicate transmission for DRB2 and DRB3. The PDCP entity corresponding to the DRB2 is PDCP2, the RLC entity corresponding to the DRB2 is RLC2, and the logical channel corresponding to the DRB2 is LCH2, that is, the data of the DRB2 is transmitted through the PDCP entity PDCP2, the RLC entity RLC2, and the logical channel LCH 2. The PDCP entity corresponding to the DRB3 is PDCP3, the RLC entity corresponding to the DRB3 is RLC3, and the logical channel corresponding to the DRB3 is LCH3, that is, the data of the DRB3 is transmitted through the PDCP entity PDCP3, the RLC entity RLC3, and the logical channel LCH 3.

As shown in fig. 6, the network device configures CG type1 resource CG1 on CC1, which is pre-configured for data transmission of the primary RLC entity RLC11 of DRB 1; in a time period from T1 to T2, the network device configures CG Type1 resource CG2 (for example, type-1CG configuration at T1 and Type-1CG de-configuration at T2 in fig. 6) for the terminal on CC2, where the resource is originally preconfigured for DRB2 resource transmission; in the time periods T3 to T4, the network device configures CG Type1 resource CG3 (for example, type-1CG configuration at T3 and Type-1CG de-configuration at T4 in fig. 6) for the terminal on the CC3, and the resource is originally preconfigured for DRB3 resource transmission.

In this embodiment, the initial status of PDCP repeated transmission of DRB1 is inactive status, and data of DRB1 is transmitted on CC 1. After the terminal meets the condition (such as HARQ NACK message in fig. 6) for triggering autonomous activation of PDCP retransmission, the terminal may select an uplink resource for transmitting a PDCP duplicate packet according to an available uplink resource on the CC1 or the CC2, and activate a corresponding cell and activate an auxiliary RLC entity for transmitting data in the cell according to the cell in which the uplink resource is located. After the auxiliary RLC entity is activated, the logical channel data corresponding to the auxiliary RLC entity is duplicated PDCP PDU, and PDCP repeated transmission is carried out by preempting the available uplink resource of the cell (CC 1 or CC 2) where the auxiliary RLC entity is located.

As shown in fig. 6, in the time period T1 to T2, after receiving the HARQ NACK corresponding to the DRB1, the terminal preempts the CG type1 resource CG2 on the CC2 for DRB1 PDCP retransmission. And in the time period T3-T4, after the terminal receives the HARQ NACK corresponding to the DRB1, preempting CG type1 resources CG3 on the CC3 for the repeated transmission of the DRB1 PDCP.

Referring to fig. 7, fig. 7 is a flowchart illustrating a communication method according to another embodiment of the present application, in which a terminal autonomously selects CG type2 for terminal-autonomously activated PDCP repeated transmission. As shown in fig. 7, the method of this embodiment may include:

s701, the network equipment configures PDCP repeated transmission of the DRB to the terminal.

S702, when triggering the PDCP repeat transmission condition of the self-activated target DRB, the terminal determines a target CG type2 for PDCP repeat transmission and activates a target auxiliary RLC entity corresponding to a cell containing the target CG type 2.

The target DRB is a DRB which is currently autonomously activated to perform PDCP retransmission, that is, a DRB to be retransmitted in the foregoing embodiment. By determining the available uplink resource for PDCP retransmission in the foregoing embodiment, a target CG type2 for PDCP retransmission is determined in the CG type2 of the target cell, which specifically refers to the foregoing embodiment and is not described again.

S703, the terminal sends the subsequent data packet of the target DRB to the network device by adopting the target auxiliary RLC entity on the target CG type2 or according to the scheduling of the network device and in a manner of activating PDCP repeat transmission.

In this embodiment, after the terminal performs PDCP retransmission on the target CG type2, the subsequent data packets may perform retransmission according to scheduling of the network device, for example, after determining that the terminal autonomously activates PDCP retransmission, the network device may allocate CG type1, CG type2, or dynamic scheduling resources to the secondary RLC entity corresponding to the cell including the target CG type 2.

And S704, when the network equipment analyzes the uplink data containing the data of the auxiliary RLC entity logical channel from the uplink data of the terminal, determining that the terminal activates uplink transmission autonomously.

The implementation principle and the technical effect of S704 may refer to the foregoing embodiments, and are not described in detail.

After S704, optionally, the network device allocates the uplink resource for a logical channel corresponding to the secondary RLC entity activated by the terminal and/or a logical channel in which the PDCP repeatedly transmits and preempts the uplink resource.

After S704, optionally, the network device determines that the terminal autonomously deactivates PDCP retransmission according to subsequent data sent by the terminal, or the network device instructs the terminal to deactivate PDCP retransmission.

Referring to fig. 8, fig. 8 is an exemplary diagram of a terminal selecting CG type2 for PDCP repetition transmission. The configuration of the DRB in fig. 8 is the same as that in fig. 6, and may refer to the description in fig. 6, which is not repeated.

Where fig. 8 is a DC scenario with CC1 on MN and CC2 and CC3 on SN.

As shown in fig. 8, the network device configures CG type1 resource CG1 on CC1, which is pre-configured for data transmission of the primary RLC entity RLC11 of DRB 1; in a time period from T1 to T2, the network device activates, for the terminal, a CG Type2 resource CG2 on the CC2 (for example, type-2CG activation at T1 and Type-2CG deactivation at T2 in fig. 8), where the resource is originally preconfigured for DRB2 resource transmission; in the time periods T3 to T4, the network device activates CG Type2 resource CG3 (for example, type-2CG activation at T3 and Type-2CG deactivation at T4 in fig. 8) on the CC3 for the terminal, which is originally preconfigured for DRB3 resource transmission.

In this embodiment, the initial status of PDCP repeated transmission of DRB1 is inactive status, and data of DRB1 is transmitted on CC 1. After the terminal meets the condition of triggering autonomous activation of PDCP retransmission (e.g., HARQ NACK message in fig. 8), the terminal may select an uplink resource for transmitting a PDCP duplicate packet according to an available uplink resource on CC1 or CC2, and activate a corresponding cell and activate an RLC entity for transmitting data in the cell according to the cell where the uplink resource is located. After the auxiliary RLC entity is activated, the logical channel data corresponding to the auxiliary RLC entity is the copied PDCP PDU, and PDCP repeated transmission is carried out by preempting the available uplink resource of the cell (CC 1 or CC 2) where the auxiliary RLC is located.

As shown in fig. 8, in the time period T1 to T2, after receiving the HARQ NACK corresponding to the DRB1, the terminal seizes CG type2 resource CG2 on CC2 for DRB1 PDCP retransmission. And in the time period T3-T4, after the terminal receives the HARQ NACK corresponding to the DRB1, seizing CG type2 resource CG3 on the CC3 for DRB1 PDCP repeated transmission.

Referring to fig. 9, fig. 9 is a flowchart of a communication method according to another embodiment of the present application, in which a terminal autonomously selects a dynamic scheduling resource for PDCP repeated transmission autonomously activated by the terminal. As shown in fig. 9, the method of this embodiment may include:

s901, the network device configures PDCP repeat transmission of DRB to the terminal.

S902, when triggering the PDCP repeat transmission condition of the autonomous activation target DRB, the terminal determines the target dynamic scheduling resource for PDCP repeat transmission and activates the target secondary RLC entity corresponding to the cell containing the target dynamic resource.

The target DRB is a DRB which is currently autonomously activated to perform PDCP retransmission, that is, a DRB to be retransmitted in the foregoing embodiment. By determining the available uplink resources for PDCP retransmission in the foregoing embodiment, the target dynamic scheduling resources for PDCP retransmission may be determined in the dynamic scheduling resources of the target cell (for example, the dynamic scheduling resources DG1 of the CC2 or the dynamic scheduling resources DG3 of the CC3 in fig. 10).

S903, the terminal adopts the target auxiliary RLC entity to send the subsequent data packet of the target DRB in a mode of activating PDCP repeated transmission according to the scheduling of the network equipment.

In this embodiment, after the terminal performs PDCP retransmission on the target dynamic scheduling resource, the subsequent data packet may be retransmitted according to the scheduling of the network device, for example, after the network device determines that the terminal autonomously activates PDCP retransmission, CG type1, CG type2, or dynamic scheduling resource may be allocated to the secondary RLC entity corresponding to the cell including the target CG type 2.

And S904, when the network equipment analyzes the uplink data containing the data of the auxiliary RLC entity logical channel from the uplink data of the terminal, determining that the terminal activates uplink transmission autonomously.

The implementation principle and the technical effect of S904 may refer to the foregoing embodiments, and are not described in detail.

After S904, optionally, the network device allocates the uplink resource for a logical channel corresponding to the secondary RLC entity activated by the terminal and/or a logical channel in which the PDCP repeatedly transmits and preempts the uplink resource.

After S904, optionally, the network device determines that the terminal autonomously deactivates PDCP retransmission according to subsequent data sent by the terminal, or the network device instructs the terminal to deactivate PDCP retransmission.

Referring to fig. 10, fig. 10 is a diagram illustrating a terminal selecting a dynamically scheduled resource for PDCP retransmission. The configuration of the DRB in fig. 10 is the same as that in fig. 6, and may refer to the description in fig. 6, which is not described again.

Where fig. 10 is a DC scenario with CC1 on MN and CC2 and CC3 on SN.

As shown in fig. 10, the network device configures CG type1 resource CG1 on CC1, which is pre-configured for data transmission of the primary RLC entity RLC11 of DRB 1; at time point T1, the network device dynamically configures a dynamic scheduling resource DG2 for the terminal on the CC2 (for example, dynamically configures through a PDCCH shown at T1 in fig. 10), and when the PDCP of the DRB1 is repeatedly transmitted, the DG2 may be used for data transmission of the secondary RLC entity RLC12 corresponding to the DRB 1; at time point T2, the network device dynamically configures a dynamic scheduling resource DG3 for the terminal on the CC3 (for example, by using the PDCCH shown at T2 in fig. 10), and when the PDCP of the DRB1 is repeatedly transmitted, the DG3 may be used for data transmission of the secondary RLC entity RLC13 corresponding to the DRB 1.

As shown in fig. 10, before time point T1, after receiving HARQ NACK corresponding to DRB1, the terminal preempts dynamic scheduling resource DG2 on CC2 for DRB1 PDCP retransmission. And before the time period T2, after the terminal receives the HARQ NACK corresponding to the DRB1, preempting a dynamic scheduling resource DG3 on the CC3 for DRB1 PDCP repeated transmission.

On the terminal side, the embodiment of the application provides a communication device, which can be a terminal. As shown in fig. 11, the communication device may include a transceiver 1101, a processor 1102, and a memory 1103.

A transceiver 1101 for receiving and transmitting data under the control of the processor 1102.

Where, in fig. 11, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1102, and various circuits, represented by the memory 1103, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1101 may be a plurality of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over transmission media including wireless channels, wired channels, fiber optic cables, and the like. Optionally, the communication apparatus may further comprise a user interface 1104, and for different user devices, the user interface 1104 may also be an interface capable of externally connecting a desired device, the connected device including but not limited to a keypad, a display, a speaker, a microphone, a joystick, etc.

The processor 1102 is responsible for managing the bus architecture and general processing, and the memory 1103 may store data used by the processor 1102 in performing operations.

Alternatively, the processor 1102 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and the processor may also adopt a multi-core architecture.

The processor 1102 is configured to invoke a computer program stored in the memory 1103, so as to execute any of the methods provided by the embodiments of the present application with respect to the terminal according to the obtained executable instructions. The processor and memory may also be physically separated.

Specifically, the processor 1102, when executing the computer program stored in the memory 1103, implements the following operations: the method comprises the steps that when a terminal autonomously activates PDCP repeated transmission, available uplink resources for the PDCP repeated transmission are determined; activating a target secondary RLC entity corresponding to a cell containing available uplink resources; and performing PDCP repeated transmission by adopting the target auxiliary RLC entity.

Optionally, the processor 1102 further performs the following operations: when the terminal autonomously activates the PDCP repeated transmission, searching for available uplink resources in the uplink resources of the target cell; the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of a DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity and in an inactive state.

Optionally, the available uplink resources include uplink preconfigured resources or dynamic scheduling resources, and the processor 1102 further performs the following operations: and searching the available uplink resources in the uplink resources of the target cell according to the LCP configuration and/or the uplink transmission priority configuration of the uplink pre-configured resources or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resources.

Optionally, the processor 1102 further performs the following operations: determining candidate uplink resources in uplink resources of a target cell, wherein the candidate uplink resources conform to LCP (liquid Crystal protocol) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and activated logical channel data of an auxiliary RLC entity can be organized into the candidate uplink resources for transmission; and determining available uplink resources in the candidate uplink resources.

Optionally, the processor 1102 further performs at least one of the following operations: determining that the available uplink resources are the uplink resources which can be skipped by the terminal before PDCP repeated transmission activation in the candidate uplink resources, and determining that the uplink resources which can be skipped are the uplink resources which do not carry the MAC SDU corresponding to the DRB before PDCP repeated transmission activation; determining the available uplink resource as the earliest available uplink resource in the candidate uplink resources; determining the available uplink resource as the uplink resource with the minimum time delay in the candidate uplink resources; determining the available uplink resources as the uplink resources with the lowest priority for carrying the logical channel data before the PDCP repeated transmission activation in the candidate uplink resources; and determining the available uplink resource as the uplink resource belonging to the authorized frequency band cell in the candidate uplink resources.

Optionally, the processor 1102 further performs the following operations: if the terminal needs to switch the PDCP repeated transmission from the inactive state to the active state, determining that the terminal needs to autonomously activate the PDCP repeated transmission; or, if the terminal needs to activate more secondary RLC entities for PDCP retransmission in an activated state, determining that the terminal needs to autonomously activate PDCP retransmission.

Optionally, the processor 1102 further performs the following operations: a first message is received from a network device, the first message configured for configuring PDCP retransmission for a terminal. The first message indicates at least one of: whether the terminal is allowed to autonomously activate PDCP retransmission; the number of secondary RLC entities allowed to be autonomously activated by the terminal; an identifier of a secondary RLC entity that allows the terminal to activate autonomously; and the terminal autonomously activates the priority of the logical channel corresponding to the auxiliary RLC entity when the PDCP is repeatedly transmitted.

Optionally, the processor 1102 further performs the following operations: in the target auxiliary RLC entity, PDCP repeated transmission is carried out on the uplink resources occupied by the logic channel data of which the logic channel priority is smaller than the priority threshold or the logic channel priority is smaller than the logic channel priority of the logic channel corresponding to the target auxiliary RLC entity.

Optionally, the processor 1102 further performs the following operations: a second message is received from the network device. The second message indicates at least one of: reallocating uplink resources to the target auxiliary RLC entity; reallocating uplink resources for a logic channel occupied by PDCP repeated transmission; deactivating the PDCP repeat transmission.

It should be noted that, the apparatus provided in the present application can implement all the method steps implemented by the terminal in the foregoing method embodiment, and can achieve the same technical effect, and details of the same parts and beneficial effects as those in the method embodiment are not described herein again.

On the network side, the embodiment of the present application provides a communication apparatus, which may be a network device. As shown in fig. 12, the communication apparatus includes: a transceiver 1201, a processor 1202, and a memory 1203.

A transceiver 1201 for receiving and transmitting data under the control of the processor 1202.

Where, in fig. 12, the bus architecture may include any number of interconnected buses and bridges, particularly where one or more processors, represented by the processor 1202, and various circuits, represented by the memory 1203, are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1201 may be a plurality of elements including a transmitter and a receiver providing a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1202 is responsible for managing the bus architecture and general processing, and the memory 1203 may store data used by the processor 1202 in performing operations.

The processor 1202 may be a CPU, ASIC, FPGA or CPLD, and the processor may also employ a multi-core architecture.

The processor 1202 is configured to invoke a computer program stored in the memory 1203 for executing any of the methods provided by the embodiments of the present application with respect to the network device according to the obtained executable instructions. The processor and memory may also be physically separated.

Specifically, the processor 1202, when executing the computer program stored in the memory 1203, implements the following: receiving uplink data from a terminal; and if the uplink data comprises the logical channel data corresponding to the target auxiliary RLC entity which is autonomously activated by the terminal, determining that the PDCP which is autonomously activated by the terminal is repeatedly transmitted.

Optionally, the processor 1202 further performs the following operations: and sending a first message to the terminal, wherein the first message is used for configuring PDCP repeated transmission of the terminal. The first message indicates at least one of: whether the terminal is allowed to autonomously activate PDCP repeat transmission; the number of secondary RLC entities that the terminal is allowed to activate autonomously; identification of a secondary RLC entity which allows the terminal to activate autonomously; and the terminal autonomously activates the priority of the logical channel corresponding to the auxiliary RLC entity when the PDCP is repeatedly transmitted.

Optionally, the processor 1202 further performs the following operations: and sending the second message to the terminal. The second message indicates at least one of: reallocating uplink resources to the target auxiliary RLC entity; reallocating uplink resources for the logic channel preempted by the PDCP repeated transmission; deactivating the PDCP repeat transmission.

It should be noted that, the apparatus provided in the present application can implement all the method steps implemented by the network device in the foregoing method embodiments, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in this embodiment are not repeated here.

On the terminal side, the embodiment of the application also provides a communication device, which can be a terminal. As shown in fig. 13, the communication apparatus includes: a processing unit 1301 and a transceiving unit 1302.

A processing unit 1301, configured to determine an available uplink resource for PDCP retransmission and activate a target secondary RLC entity corresponding to a cell including the available uplink resource when the terminal autonomously activates PDCP retransmission.

A transceiving unit 1302, configured to perform PDCP retransmission by using a target secondary RLC entity.

Optionally, the processing unit 1301 is specifically configured to: when the terminal autonomously activates the PDCP repeated transmission, searching for available uplink resources in the uplink resources of the target cell; the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of the DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity and in an inactive state.

Optionally, the available uplink resource includes an uplink preconfigured resource or a dynamic scheduling resource. The processing unit 1301 is specifically configured to: and searching the available uplink resource in the uplink resource of the target cell according to the LCP configuration and/or the uplink transmission priority configuration of the uplink pre-configured resource or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resource.

Optionally, the processing unit 1301 is specifically configured to: determining candidate uplink resources in uplink resources of a target cell, wherein the candidate uplink resources conform to LCP (liquid Crystal protocol) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and activated logical channel data of an auxiliary RLC entity can be organized into the candidate uplink resources for transmission; and determining available uplink resources in the candidate uplink resources.

Optionally, the processing unit 1301 is specifically configured to at least one of: determining that the available uplink resources are the uplink resources which can be skipped by the terminal before PDCP repeated transmission activation in the candidate uplink resources, and determining that the uplink resources which can be skipped are the uplink resources which do not carry the MAC SDU corresponding to the DRB before PDCP repeated transmission activation; determining the available uplink resource as the earliest available uplink resource in the candidate uplink resources; determining the available uplink resource as the uplink resource with the minimum time delay in the candidate uplink resources; determining the available uplink resources as the uplink resources with the lowest priority for carrying the logical channel data before the PDCP repeated transmission activation in the candidate uplink resources; and determining the available uplink resources as the uplink resources belonging to the cell of the authorized frequency band in the candidate uplink resources.

Optionally, the processing unit 1301 is further configured to: if the terminal needs to switch the PDCP repeated transmission from the inactive state to the active state, determining that the terminal needs to autonomously activate the PDCP repeated transmission; or, if the terminal needs to activate more secondary RLC entities for PDCP retransmission in an activated state, determining that the terminal needs to autonomously activate PDCP retransmission.

Optionally, the transceiving unit 1302 is further configured to: a first message is received from a network device, the first message configured for configuring PDCP retransmission for a terminal. The first message indicates at least one of: whether the terminal is allowed to autonomously activate PDCP retransmission; the number of secondary RLC entities allowed to be autonomously activated by the terminal; an identifier of a secondary RLC entity that allows the terminal to activate autonomously; and the terminal autonomously activates the priority of the logical channel corresponding to the auxiliary RLC entity when the PDCP is repeatedly transmitted.

Optionally, the transceiver 1302 is specifically configured to: in the target auxiliary RLC entity, PDCP repeated transmission is carried out on the uplink resources occupied by the logic channel data of which the logic channel priority is smaller than the priority threshold or the logic channel priority is smaller than the logic channel priority of the logic channel corresponding to the target auxiliary RLC entity.

Optionally, the transceiving unit 1302 is further configured to: a second message is received from the network device. The second message indicates at least one of: reallocating uplink resources to the target auxiliary RLC entity; reallocating uplink resources for a logic channel occupied by the repeated transmission of the PDCP; deactivating the PDCP repeat transmission.

It should be noted that, the apparatus provided in the present application can implement all the method steps implemented by the terminal in the foregoing method embodiments, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in this embodiment are not repeated here.

On the network side, an embodiment of the present application further provides a communication device, and the communication device of this embodiment may be a network device. As shown in fig. 14, the communication apparatus includes: a transceiver unit 1401 and a processing unit 1402.

A transceiver unit 1401, configured to receive uplink data from a terminal.

A processing unit 1402, configured to determine that the terminal autonomously activates PDCP retransmission if the uplink data includes logical channel data corresponding to a target secondary RLC entity autonomously activated by the terminal.

Optionally, the transceiving unit 1401 is further configured to: and sending a first message to the terminal, wherein the first message is used for configuring PDCP repeated transmission of the terminal. The first message indicates at least one of: whether the terminal is allowed to autonomously activate PDCP retransmission; the number of secondary RLC entities allowed to be autonomously activated by the terminal; an identifier of a secondary RLC entity that allows the terminal to activate autonomously; and the terminal autonomously activates the priority of the logical channel corresponding to the auxiliary RLC entity when the PDCP is repeatedly transmitted.

Optionally, the transceiving unit 1401 is further configured to: and sending the second message to the terminal. The second message indicates at least one of: reallocating uplink resources to the target auxiliary RLC entity; reallocating uplink resources for the logic channel preempted by the PDCP repeated transmission; deactivating the PDCP repeat transmission.

It should be noted that, the apparatus provided in the present application can implement all the method steps implemented by the network device in the foregoing method embodiment, and can achieve the same technical effect, and details of the same parts and beneficial effects as those in the method embodiment are not described herein again.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

On the terminal side, embodiments of the present application provide a processor-readable storage medium, where a computer program is stored, and the computer program is configured to enable a processor to execute any one of the methods provided in the embodiments of the present application in relation to a terminal. All the method steps implemented by the terminal in the method embodiment can be implemented by the processor, and the same technical effects can be achieved, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted here.

On the network side, an embodiment of the present application provides a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is configured to enable a processor to execute any one of the methods provided in the embodiment of the present application with respect to a network device. The processor is enabled to implement all the method steps implemented by the network device in the foregoing method embodiment, and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in this embodiment are omitted here.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

At the terminal side, an embodiment of the present application provides a computer program product including instructions, so that when the instructions are run on a computer, the computer executes all the method steps implemented by the terminal in the foregoing method embodiments, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in this embodiment are omitted here.

On the network side, an embodiment of the present application provides a computer program product including instructions, so that when the instructions are run on a computer, the computer executes all the method steps implemented by the network device in the foregoing method embodiments, and the same technical effects can be achieved, and detailed descriptions of the same parts and beneficial effects as those in the method embodiments in this embodiment are omitted here.

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

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

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

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

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

Claims

1. A communication method is applied to a terminal and comprises the following steps:

the terminal determines available uplink resources for Packet Data Convergence Protocol (PDCP) repeated transmission when the PDCP repeated transmission is autonomously activated;

activating a target secondary Radio Link Control (RLC) entity corresponding to a cell containing the available uplink resources;

and performing the PDCP repeated transmission by adopting the target auxiliary RLC entity.

2. The communication method according to claim 1, wherein the terminal determines available uplink resources for packet data convergence protocol PDCP duplicate transmission when autonomously activating the PDCP duplicate transmission, comprising:

when the terminal autonomously activates the PDCP repeated transmission, searching the available uplink resource in the uplink resource of the target cell;

the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of a data radio bearer DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to the PDCP entity and in an inactive state.

3. The communication method according to claim 2, wherein the available uplink resource includes an uplink pre-configured resource or a dynamic scheduling resource, and the searching for the available uplink resource in the uplink resource of the target cell includes:

and searching the available uplink resource in the uplink resource of the target cell according to the logical channel priority LCP configuration and/or the uplink transmission priority configuration of the uplink pre-configured resource, or according to the LCP configuration and/or the uplink transmission priority configuration of the dynamic scheduling resource.

4. The communication method according to claim 3, wherein the searching for the available uplink resource in the uplink resource of the target cell according to the logical channel priority LCP configuration and/or uplink transmission priority configuration of the uplink pre-configured resource or according to the LCP configuration and/or uplink transmission priority configuration of the dynamically scheduled resource comprises:

determining candidate uplink resources in the uplink resources of the target cell, wherein the candidate uplink resources conform to LCP (liquid Crystal protocol) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and logical channel data of the activated secondary RLC entity can be organized into the candidate uplink resources for transmission;

and determining the available uplink resource in the candidate uplink resources.

5. The communication method according to claim 4, wherein the determining the available uplink resource from among the candidate uplink resources comprises at least one of:

determining the available uplink resource as the uplink resource which can be skipped by the terminal before the PDCP repeated transmission activation in the candidate uplink resources, wherein the uplink resource which can be skipped by the terminal is determined as the uplink resource which does not carry the media access control service data unit MAC SDU corresponding to the DRB before the PDCP repeated transmission activation;

determining the available uplink resource as the uplink resource with the lowest priority for carrying logical channel data before the PDCP repeated transmission activation in the candidate uplink resources;

and determining the available uplink resource as the uplink resource belonging to the cell of the authorized frequency band in the candidate uplink resources.

6. The communication method according to any one of claims 1 to 5, wherein when the terminal autonomously activates the PDCP repeat transmission, the method comprises:

when the terminal switches the PDCP repeated transmission from an inactive state to an active state;

or, the terminal activates more secondary RLC entities for PDCP retransmission in an activated state.

7. The communication method according to any one of claims 1 to 5, wherein before the determining the available uplink resources for the PDCP repeated transmission, the communication method further comprises:

receiving a first message from a network device, the first message being used for configuring PDCP repeat transmission of the terminal, the first message indicating at least one of:

whether to allow the terminal to autonomously activate PDCP duplicate transmission;

an identity of a secondary RLC entity that allows the terminal to activate autonomously;

8. The communication method according to any of claims 1-5, wherein the performing the PDCP repeat transmission using the target secondary RLC entity comprises:

and in the target auxiliary RLC entity, performing the PDCP repeated transmission on an uplink resource occupied by the logic channel data of which the logic channel priority is smaller than a priority threshold or the logic channel priority is smaller than the logic channel priority of the logic channel corresponding to the target auxiliary RLC entity.

9. The communication method according to any of claims 1-5, wherein after the PDCP repeat transmission using the target secondary RLC entity, the communication method further comprises:

receiving a second message from a network device, the second message indicating at least one of:

reallocating uplink resources to the target auxiliary RLC entity;

reallocating uplink resources for the logic channel occupied by the PDCP repeated transmission;

deactivating the PDCP duplicate transmission.

10. A communication method applied to a network device includes:

receiving uplink data from a terminal;

and if the uplink data comprises logical channel data corresponding to a target auxiliary RLC entity autonomously activated by the terminal, determining that the PDCP repeated transmission is autonomously activated by the terminal.

11. The communication method according to claim 10, wherein before receiving uplink data from the terminal, the communication method further comprises:

sending a first message to the terminal, the first message being used for configuring PDCP repeat transmission of the terminal, the first message indicating at least one of:

whether to allow the terminal to autonomously activate PDCP repeat transmission;

12. The communication method according to claim 10 or 11, wherein after determining that the terminal has autonomously activated PDCP repeated transmission, the communication method further comprises:

reallocating uplink resources to the target auxiliary RLC entity;

deactivating the PDCP duplicate transmission.

13. A communication device, for use in a terminal, the communication device comprising a memory, a transceiver, and a processor:

the memory for storing a computer program;

the transceiver is used for transceiving data under the control of the processor;

the processor is used for reading the computer program in the memory and executing the following operations:

the terminal determines available uplink resources for PDCP repeated transmission when autonomously activating the PDCP repeated transmission;

activating a target secondary RLC entity corresponding to the cell containing the available uplink resources;

14. The communications apparatus of claim 13, wherein the processor further performs the following:

when the terminal autonomously activates the PDCP repeated transmission, searching the available uplink resources in the uplink resources of the target cell;

the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity of a DRB to be repeatedly transmitted, or the target cell includes a cell corresponding to a secondary RLC entity corresponding to a PDCP entity and being in an inactive state.

15. The communications apparatus of claim 14, wherein the available uplink resources comprise uplink configuration resources or dynamic scheduling resources, and wherein the processor further performs the following:

determining candidate uplink resources in the uplink resources of the target cell, wherein the candidate uplink resources conform to LCP (liquid crystal display) configuration and/or uplink transmission priority configuration of uplink pre-configured resources, or conform to LCP configuration and/or uplink transmission priority configuration of dynamic scheduling resources, and logical channel data corresponding to the target secondary RLC entity can be organized into the pre-configured resources or the dynamic scheduling resources for transmission;

16. The communications apparatus of claim 15, wherein the processor further performs at least one of:

determining the available uplink resources as uplink resources which can be skipped by the terminal before the PDCP repeated transmission activation in the candidate uplink resources, wherein the determined uplink resources which can be skipped are uplink resources which do not carry MAC SDU corresponding to the DRB before the PDCP repeated transmission activation;

and determining the uplink resources belonging to the cell of the authorized frequency band in the candidate uplink resources in the available uplink resources.

17. The communications device of any one of claims 13-16, wherein the processor further performs the following:

reallocating uplink resources to the target auxiliary RLC entity;

deactivating the PDCP duplicate transmission.

18. A communication apparatus, applied to a network device, the communication apparatus comprising a memory, a transceiver, and a processor:

the memory for storing a computer program;

receiving uplink data from a terminal;

19. The communications apparatus of claim 18, wherein the processor further performs the following:

reallocating uplink resources to the target auxiliary RLC entity;

deactivating the PDCP duplicate transmission.

20. A communication apparatus, applied to a terminal, comprising:

a processing unit, configured to determine an available uplink resource for PDCP retransmission and activate a target secondary RLC entity corresponding to a cell including the available uplink resource when the terminal autonomously activates PDCP retransmission;

and the receiving and sending unit is used for carrying out the PDCP repeated transmission by adopting the target auxiliary RLC entity.

21. A communication apparatus, applied to a network device, comprising:

and the processing unit is used for determining that the terminal autonomously activates PDCP repeated transmission if the uplink data contains logical channel data corresponding to a target auxiliary RLC entity autonomously activated by the terminal.

22. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the communication method of any one of claims 1-12.