CN115884312A - Communication method and related device - Google Patents

Abstract

The application provides a communication method and a related device, wherein the method comprises the following steps: sending a first request message to a second network device, wherein the first request message is used for requesting auxiliary information of a first cascade, and the first cascade comprises a Packet Data Convergence Protocol (PDCP) cascade or a Service Data Adaptation Protocol (SDAP) cascade; receiving a first response message from the second network device, the first response message including assistance information of the first cascade; and sending the configuration information of the first cascade to terminal equipment, wherein the configuration information of the first cascade is determined according to the auxiliary information of the first cascade. By implementing the embodiment of the application, more reliable PDCP cascade connection or SDAP cascade connection is realized.

Description

A communication method and related device

technical field

The present application relates to the technical field of communication, and in particular, to a communication method and a related device.

Background technique

Currently, a dual connectivity (DC) repeated transmission technology may be used to improve the reliability of data transmission. It can be understood that in a DC scenario, two base stations are often involved, such as a primary base station and a secondary base station. Generally speaking, the primary base station can send data to the secondary base station, and then the secondary base station sends data to the terminal device. Certainly, the master base station may also directly send the data to the terminal device. If the data sent by the primary base station is too small, there may be cases where the primary base station needs to perform cascading processing on multiple data before sending it to the secondary base station or the terminal device. Or, if the data sent by the terminal device is too small, it may happen that the terminal device needs to perform cascading processing on multiple data before sending it to the secondary base station or the main base station. However, the current cascading is all media access control (medium access control, MAC) cascading or radio link control (radiolink control, RLC) cascading, no packet data convergence protocol (packet data convergence protocol, PDCP) cascading Or service data adaptation protocol (service data adaptation protocol, SDAP) cascading. Therefore, how to realize more reliable PDCP cascading or SDAP cascading has become a technical problem to be solved urgently.

Contents of the invention

The present application provides a communication method and a related device, which realize more reliable PDCP cascading or SDAP cascading.

In a first aspect, a communication method is provided, the method is applied to a first network device, and the method includes:

Sending a first request message to the second network device, where the first request message is used to request auxiliary information of a first cascade, where the first cascade includes a packet data convergence protocol PDCP cascade or a service data adaptation protocol SDAP level couplet;

receiving a first response message from the second network device, the first response message including the first concatenated assistance information;

Send the configuration information of the first cascade to the terminal device, where the configuration information of the first cascade is determined according to the auxiliary information of the first cascade.

It can be seen that in the above technical solution, by sending the first request message requesting the auxiliary information of PDCP concatenation or SDAP concatenation to the second network device, the second network device sends the auxiliary information to the first network device, and then can Determine the configuration information of PDCP cascading or SDAP cascading according to the auxiliary information, and send the configuration information to the terminal device, which realizes the determination of the configuration information of PDCP cascading or SDAP cascading in the case of negotiation between different devices, so that the configuration information It can meet the requirements of different devices for PDCP cascading or SDAP cascading, thus realizing more reliable PDCP cascading or SDAP cascading.

Optionally, if the first concatenation is PDCP concatenation, the auxiliary information of the first concatenation includes auxiliary information of PDCP concatenation of the first radio bearer, and if the first concatenation is SDAP concatenation, The first concatenated auxiliary information includes SDAP concatenated auxiliary information of the first radio bearer, and the first request message further includes an identifier of the first radio bearer.

It can be seen that in the above technical solution, by sending the identifier of the first radio bearer to the first network device, the first network device can perform PDCP concatenation or SDAP concatenation on the data packets transmitted by the first radio bearer according to the configuration information. , so that small data packets can be cascaded into larger data packets, thereby reducing the L2 overhead during transmission.

Optionally, the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer includes one or more of the following:

The number of data packets included in the concatenated data packets transmitted by the first radio bearer;

The size of the concatenated data packet transmitted by the first radio bearer;

The load of the second network device.

It can be seen that in the above technical solution, by sending the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer to the first network device, the first network device can more accurately determine the The configuration information is realized, and the configuration information of PDCP cascading or SDAP cascading is determined under the negotiation of different devices, so that the configuration information can meet the requirements of different devices for PDCP cascading or SDAP cascading, thus realizing more reliable PDCP cascade or SDAP cascade.

Optionally, the first request message further includes a quality of service (quality of service, Qos) parameter.

It can be seen that in the above technical solution, because the first request message also includes the Qos parameter, the first network device can determine the configuration information in combination with the Qos parameter, realizing the determination of the PDCP cascade or SDAP level in the case of negotiation between different devices. The cascading configuration information makes the configuration information meet the requirements of different devices for PDCP cascading or SDAP cascading, thereby realizing more reliable PDCP cascading or SDAP cascading.

Optionally, the first request message further includes first indication information, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the first radio link control (radio link control, RLC) transmission mode , the transmission mode of the first RLC does not allow segmentation or does not allow segmentation when a preset condition is met.

It can be seen that in the above technical solution, by sending the first indication information to the second network device, the second network device does not segment or process the data packets transmitted by the first radio bearer that have undergone PDCP concatenation or SDAP concatenation. Segmentation is not performed when the preset conditions are met, which avoids the problem of increased L2 overhead caused by segmentation or too many segments.

Optionally, the method further includes: sending first indication information to the terminal device, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, the The transmission mode of the first RLC does not allow segmentation or does not allow segmentation when a preset condition is met.

It can be seen that in the above technical solution, by sending the first indication information to the terminal device, the terminal device does not perform segmentation processing on the data packet transmitted by the first radio bearer that has undergone PDCP concatenation or SDAP concatenation or meets the preset requirements. Segmentation processing is not performed under certain conditions, which avoids the problem of increased L2 overhead caused by segmentation or excessive segmentation.

Optionally, the preset conditions include one or more of the following:

The size of the concatenated data packet transmitted by the first radio bearer is less than or equal to a first threshold;

The number of times of fragmenting the concatenated data packets transmitted by the first radio bearer is greater than or equal to a second threshold.

Optionally, the method further includes: sending a first uplink grant to the terminal device; sending and receiving second indication information from the terminal device, where the second indication information is sent according to the first uplink grant, the The second indication information is used to indicate that the concatenated data packet to be transmitted corresponding to the first radio bearer cannot be transmitted through the first uplink grant; send a second uplink grant to the terminal device according to the second indication information; The second uplink grant receives the concatenated data packet to be transmitted from the terminal device.

It can be seen that, in the above technical solution, by sending the first uplink authorization to the terminal device, the terminal device sends the second indication information to the first network device according to the first uplink authorization, so that the terminal device cannot transmit information based on the first uplink authorization. When the concatenated data packet is to be transmitted, the second uplink grant is sent to the terminal device, so that the terminal device can send the concatenated data packet to be transmitted through the second uplink grant.

Optionally, the second indication information also includes one or more of the following:

The logical channel identifier corresponding to the concatenated data packet to be transmitted;

The size of the concatenated data packet to be transmitted.

It can be seen that in the above technical solution, the first network device can know the logical channel identifier corresponding to the concatenated data packet to be transmitted and/or the size of the concatenated data packet to be transmitted, so that the uplink authorization can be better allocated to the terminal device , so that the terminal device can transmit the concatenated data packet to be transmitted based on the uplink grant.

In a second aspect, a communication method is provided, the method is applied to a second network device, and the method includes:

Receive a first request message from a first network device, where the first request message is used to request auxiliary information of a first cascade, where the first cascade includes a Packet Data Convergence Protocol PDCP concatenation or a Service Data Adaptation Protocol SDAP level couplet;

sending a first response message to the first network device, where the first response message includes auxiliary information of the first cascade, and the auxiliary information of the first cascade is used to determine the configuration of the first cascade information.

It can be seen that in the above technical solution, by receiving the first request message requesting auxiliary information of PDCP concatenation or SDAP concatenation from the first network device, the second network device can send the auxiliary information to the first network device, and then The first network device can determine the configuration information of PDCP cascading or SDAP cascading according to the auxiliary information, and send the configuration information to the terminal device, realizing the determination of the configuration of PDCP cascading or SDAP cascading under the condition of negotiation between different devices Information, so that the configuration information can meet the requirements of different devices for PDCP cascading or SDAP cascading, thereby realizing more reliable PDCP cascading or SDAP cascading.

Optionally, if the first concatenation is PDCP concatenation, the auxiliary information of the first concatenation includes auxiliary information of PDCP concatenation of the first radio bearer, and if the first concatenation is SDAP concatenation, The first concatenated auxiliary information includes SDAP concatenated auxiliary information of the first radio bearer, and the first request message further includes an identifier of the first radio bearer.

It can be seen that in the above technical solution, by sending the identifier of the first radio bearer to the first network device, the first network device can perform PDCP concatenation or SDAP concatenation on the data packets transmitted by the first radio bearer according to the configuration information. , so that small data packets can be cascaded into larger data packets, thereby reducing the L2 overhead during transmission.

Optionally, the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer includes one or more of the following:

The number of data packets included in the concatenated data packets transmitted by the first radio bearer;

The size of the concatenated data packet transmitted by the first radio bearer;

The load of the second network device.

It can be seen that in the above technical solution, by sending the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer to the first network device, the first network device can more accurately determine the The configuration information is realized, and the configuration information of PDCP cascading or SDAP cascading is determined under the negotiation of different devices, so that the configuration information can meet the requirements of different devices for PDCP cascading or SDAP cascading, thus realizing more reliable PDCP cascade or SDAP cascade.

Optionally, the first request message further includes a Qos parameter.

It can be seen that in the above technical solution, because the first request message also includes the Qos parameter, the first network device can determine the configuration information in combination with the Qos parameter, realizing the determination of the PDCP cascade or SDAP level in the case of negotiation between different devices. The cascading configuration information makes the configuration information meet the requirements of different devices for PDCP cascading or SDAP cascading, thereby realizing more reliable PDCP cascading or SDAP cascading.

Optionally, the first request message further includes first indication information, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the first RLC The transfer mode for does not allow fragmentation or does not allow fragmentation if preset conditions are met.

It can be seen that in the above technical solution, by sending the first indication information to the second network device, the second network device does not segment or process the data packets transmitted by the first radio bearer that have undergone PDCP concatenation or SDAP concatenation. Segmentation is not performed when the preset conditions are met, which avoids the problem of increased L2 overhead caused by segmentation or too many segments.

In a third aspect, a communication device is provided, the device includes a transceiver module, and the transceiver module is used for

Sending a first request message to the second network device, where the first request message is used to request auxiliary information of a first cascade, where the first cascade includes a packet data convergence protocol PDCP cascade or a service data adaptation protocol SDAP level couplet;

receiving a first response message from the second network device, the first response message including the first concatenated assistance information;

Send the configuration information of the first cascade to the terminal device, where the configuration information of the first cascade is determined according to the auxiliary information of the first cascade.

Optionally, if the first concatenation is PDCP concatenation, the auxiliary information of the first concatenation includes auxiliary information of PDCP concatenation of the first radio bearer, and if the first concatenation is SDAP concatenation, The first concatenated auxiliary information includes SDAP concatenated auxiliary information of the first radio bearer, and the first request message further includes an identifier of the first radio bearer.

Optionally, the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer includes one or more of the following:

The number of data packets included in the concatenated data packets transmitted by the first radio bearer;

The size of the concatenated data packet transmitted by the first radio bearer;

The load of the second network device.

Optionally, the first request message further includes a Qos parameter.

Optionally, the first request message further includes first indication information, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the first RLC The transfer mode for does not allow fragmentation or does not allow fragmentation if preset conditions are met.

Optionally, the transceiver module is further configured to send first indication information to the terminal device, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, so The transmission mode of the first RLC does not allow segmentation or does not allow segmentation when a preset condition is met.

Optionally, the preset conditions include one or more of the following:

The size of the concatenated data packet transmitted by the first radio bearer is less than or equal to a first threshold;

The number of times of fragmenting the concatenated data packets transmitted by the first radio bearer is greater than or equal to a second threshold.

Optionally, the transceiver module is further configured to send a first uplink grant to the terminal device; send and receive second indication information from the terminal device, the second indication information is sent according to the first uplink grant, and the The second indication information is used to indicate that the concatenated data packet to be transmitted corresponding to the first radio bearer cannot be transmitted through the first uplink grant; send a second uplink grant to the terminal device according to the second indication information; The second uplink grant receives the concatenated data packet to be transmitted from the terminal device.

Optionally, the second indication information also includes one or more of the following:

The logical channel identifier corresponding to the concatenated data packet to be transmitted;

The size of the concatenated data packet to be transmitted.

In a fourth aspect, a communication device is provided, the device includes a transceiver module, and the transceiver module is used for

Receive a first request message from a first network device, where the first request message is used to request auxiliary information of a first cascade, where the first cascade includes a Packet Data Convergence Protocol PDCP concatenation or a Service Data Adaptation Protocol SDAP level couplet;

sending a first response message to the first network device, where the first response message includes auxiliary information of the first cascade, and the auxiliary information of the first cascade is used to determine the configuration of the first cascade information.

Optionally, if the first concatenation is PDCP concatenation, the auxiliary information of the first concatenation includes auxiliary information of PDCP concatenation of the first radio bearer, and if the first concatenation is SDAP concatenation, The first concatenated auxiliary information includes SDAP concatenated auxiliary information of the first radio bearer, and the first request message further includes an identifier of the first radio bearer.

Optionally, the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer includes one or more of the following:

The number of data packets included in the concatenated data packets transmitted by the first radio bearer;

The size of the concatenated data packet transmitted by the first radio bearer;

The load of the second network device.

Optionally, the first request message further includes a Qos parameter.

Optionally, the first request message further includes first indication information, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the first RLC The transfer mode for does not allow fragmentation or does not allow fragmentation if preset conditions are met.

In a fifth aspect, a communication device is provided, including a processor and a memory, and the processor invokes a computer program stored in the memory to implement the method according to any one of the first aspect or the second aspect.

According to a sixth aspect, a communication device is provided, the communication device includes a processor and a communication interface, the communication interface is used for inputting and/or outputting information, and the processor is used for executing a computer program, so that the device performs the following steps: The method according to any one of the first aspect or the second aspect.

In the seventh aspect, there is provided a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method described in any one of the first aspect or the second aspect is realized. method.

In an eighth aspect, a computer program product is provided, the computer program product stores a computer program, and when the computer program is executed by a computer, the computer executes the method described in any one of the first aspect, or , the method of any one of the second aspect, or, the method of any one of the third aspect.

A ninth aspect provides a communication system, including the above-mentioned terminal device, the above-mentioned first network device, and the above-mentioned second network device.

Description of drawings

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

in:

Fig. 1 is a schematic diagram of a protocol stack;

FIG. 2 is a schematic diagram of a data packet processing flow;

FIG. 3 is a schematic diagram of a data processing flow involved in a PDCP cascading or SDAP cascading scenario provided by the embodiment of this solution;

Fig. 4 is the infrastructure of the communication system provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of different devices connected through interfaces provided by the embodiment of the present application;

FIG. 6 is a schematic diagram of a hardware structure applicable to a communication device provided by an embodiment of the present application;

FIG. 7 is a schematic flowchart of a communication method provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 9 is a schematic flowchart of another communication method provided by the embodiment of the present application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a simplified network device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Wherein, the terms "system" and "network" in the embodiments of the present application may be used interchangeably. Unless otherwise specified, "/" means that the related objects are an "or" relationship, for example, A/B can mean A or B; "and/or" in this application is only a way to describe related objects Associative relationship means that there may be three kinds of relationships, for example, A and/or B, which may mean: A exists alone, A and B exist simultaneously, and B exists independently, where A and B can be singular or plural. And, in the description of the present application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be one or more . In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that words such as "first" and "second" do not limit the number and execution order, and words such as "first" and "second" do not necessarily limit the difference.

References to "one embodiment" or "some embodiments" and the like described in the embodiments of the present application mean that specific features, structures or characteristics described in connection with the embodiments are included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. in various places in this specification are not necessarily All refer to the same embodiment, but mean "one or more but not all embodiments" unless specifically stated otherwise. The terms "including", "comprising", "having" and variations thereof mean "including but not limited to", unless specifically stated otherwise.

The following specific implementations further describe the purpose, technical solutions and beneficial effects of the application in detail. It should be understood that the following are only specific implementations of the application and are not intended to limit the scope of protection of the application. On the basis of the technical solution of this application, any modification, equivalent replacement, improvement, etc. should be included in the protection scope of this application.

In the fifth generation mobile communication technology (5th Generation, 5G) system, the protocol stack includes the following protocol layers: SDAP, PDCP, RLC, MAC, physical (Physical, PHY), and different protocol layers have their own functions. For example, refer to FIG. 1 , which is a schematic diagram of a protocol stack. As shown in FIG. 1 , both the terminal equipment or the base station include a protocol stack. Regardless of the terminal equipment or the base station, the order of its data processing is: SDAP->PDCP->RLC->MAC->PHY. The main processing of data in SDAP includes: mapping of QoS flow (flow) to radio bearer (radio bearer, RB). The main processing of data in PDCP includes: encryption, integrity protection, header compression, adding a PDCP sequence number (sequence number, SN), etc. The data of different RBs is obtained at the PDCP layer, and the terminal device can perform respective processing on the data of different RBs. One logical channel corresponds to one RB. The main processing of data in RLC: for acknowledgment mode (acknowledge mode, AM), automatic repeat request (automatic repeat request, ARQ), segmentation, reassembly, adding RLC SN; for unacknowledgement mode (un acknowledge mode, UM) mode, split Segment, reorganize, add RLC SN. Data processing in the MAC mainly includes logical channel multiplexing and hybrid automatic repeat request (HARQ). A data packet is processed in the above order and finally sent by the PHY. On the receiving side, reverse processing can be performed in the reverse order, which will not be repeated here.

Currently, a data packet needs to be sequentially processed by SDAP, PDCP, RLC, and MAC, then concatenated at the RLC layer or MAC layer, and finally sent to the network device. For example, refer to FIG. 2 , which is a schematic flow chart of data packet processing. As shown in Figure 2, for RBx and RBy, the nth Internet protocol (internet protocol, IP) packet (packet), the n+1th IP packet and the mth IP packet pass through SDAP, PDCP, RLC 1. After the MAC is processed in sequence, the data packets transmitted by the RBx and some of the data packets transmitted by the RBy are concatenated at the MAC layer. It can be understood that the data packet transmitted by RBy is segmented into two parts at the RLC layer, that is, service data unit (service data unit, SDU) segment (segment) 1 and SDU segment 2 in FIG. 2 . Wherein, some data packets transmitted by RBy can be understood as MAC SDU of SDU segment1 in MAC layer.

In addition, for a small packet (such as 50 bytes), the L2 header overhead is about 6 bytes, and the header overhead ratio is 6/56, which is relatively high. In other words, if cascading is performed at the RLC layer or the MAC layer, the L2 overhead is large. In order to solve the problem of large L2 overhead, this solution proposes PDCP cascading or SDAP cascading. For the data processing flow involved in the PDCP cascading or SDAP cascading scenario, refer to FIG. 3 . FIG. 3 provides a schematic diagram of the data processing flow involved in the PDCP cascading or SDAP cascading scenario in this solution embodiment. Combining with FIG. 3 , it can be seen that concatenation, serial number allocation, header compression, encryption and integrity protection can be performed sequentially for data packets, wherein the concatenation is PDCP concatenation or SDAP concatenation. For example, the terminal device can first concatenate multiple SDUs to obtain a data packet, which can be called a concatenated SDU; then, the terminal device allocates an SN for the concatenated SDU, and the SN is used to identify the concatenated SDU; then, The terminal device compresses the header of the concatenated SDU; finally, it performs encryption and integrity protection. However, the current cascading is all media access control (medium access control, MAC) cascading or radio link control (radio link control, RLC) cascading, no packet data convergence protocol (packet data convergence protocol, PDCP) cascading Or service data adaptation protocol (service data adaptation protocol, SDAP) cascading. Therefore, how to realize more reliable PDCP cascading or SDAP cascading has become a technical problem to be solved urgently.

Based on this, the present application provides a communication method to solve the above technical problem, and the following describes the embodiments of the present application in detail.

It should be understood that the technical solutions of the embodiments of the present application can be applied to the long term evolution (long term evolution, LTE) architecture, the fifth generation mobile communication technology (5th generation mobile networks, 5G), the 4.5th generation mobile communication technology (the 4.5 generation mobile networks, 4.5G), wireless local area network (wireless local area networks, WLAN) system, etc. The technical solutions of the embodiments of the present application can also be applied to other communication systems in the future, such as 6G communication systems, etc. In the future communication systems, the functions may remain the same, but the names may be changed.

The basic structure of the communication system provided by the embodiment of the present application is introduced below. Referring to FIG. 4, FIG. 4 is a basic architecture of a communication system provided by an embodiment of the present application. As shown in FIG. 4 , the communication system may include a first network device 10 , a second network device 20 and a terminal device 30 communicating with the first network device 10 or the second network device 20 . FIG. 4 is only a schematic diagram, and does not constitute a limitation on the applicable scenarios of the technical solution provided in this application.

Wherein, the first network device 10 and the second network device 20 are entities on the network side for sending signals, or receiving signals, or sending signals and receiving signals. The first network device 10 and the second network device 20 may be devices deployed in a radio access network (radio access network, RAN) to provide a wireless communication function for the terminal device 30, for example, may be a transmission reception point (transmission reception point, TRP ), base stations, and various forms of control nodes. For example, a network controller, a wireless controller, a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, and the like. Specifically, the network equipment may be various forms of macro base stations, micro base stations (also called small cells), relay stations, access points (access point, AP), radio network controllers (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (basetransceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand unit , BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center), etc., may also be the antenna panel of the base station. The control node can connect multiple base stations, and configure resources for multiple terminals under the coverage of multiple base stations. In systems adopting different radio access technologies, the names of the equipment with base station functions may be different. For example, it may be a gNB or ng-eNB in 5G, or a network-side device in a network after 5G or a network device in a future evolved PLMN network. This application does not limit the specific name of the network device. In addition, the first network device 10 and the second network device 20 may further include a central unit (central unit, CU) and a distributed unit (distributed unit, DU) integrated on the gNB.

Wherein, the terminal device 30 is an entity on the user side for receiving signals, or sending signals, or receiving signals and sending signals. The terminal device 30 is used to provide users with one or more of voice services and data connectivity services. The terminal device 30 may be a device that includes a wireless transceiver function and can cooperate with network devices to provide communication services for users. Specifically, the terminal equipment 30 may refer to a user equipment (user equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a terminal, a wireless communication device, a user agent or user device. The terminal device 30 may also be a drone, an Internet of things (internet of things, IoT) device, a station (station, ST) in a WLAN, a cellular phone (cellular phone), a smart phone (smart phone), a cordless phone, a wireless data Cards, tablet computers, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistant (PDA) devices, laptop computers ), machine type communication (machine type communication, MTC) terminals, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices (also known as wearable smart devices) , virtual reality (virtual reality, VR) terminal, augmented reality (augmented reality, AR) terminal, wireless terminal in industrial control (industrial control), wireless terminal in self driving (self driving), remote medical (remote medical) Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc. The terminal device 30 may also be a device to device (device to device, D2D) device, for example, an electricity meter, a water meter, and the like. The terminal device 30 may also be a terminal in the 5G system, or a terminal in the next generation communication system.

In addition, in a possible implementation, the RAN node may include gNB or ng-eNB, for gNB, it provides the termination point of NR user plane and control plane protocol, for ng-eNB, it provides E-UTRAN user plane and control plane The endpoint of the protocol stack. gNB and gNB, gNB and ng-eNB, and ng-eNB and ng-eNB are connected through the Xn interface. In other words, the first network device 10 and the second network device 20 may be gNB or ng-eNB. gNB and ng-eNB can be connected with core network (5GC) through NG interface. For example, refer to FIG. 5 . FIG. 5 is a schematic diagram of different devices connected through interfaces according to the embodiment of the present application. As shown in Figure 5, gNB and gNB, gNB and ng-eNB, and ng-eNB and ng-eNB are connected through the Xn interface. The gNB and ng-eNB are connected to the core network (5GC) through the NG interface. Specifically, the gNB and ng-eNB are connected to the access and mobility management function (access and mobility management function, AMF) network element through the NG-C interface, and the gNB and ng-eNB are connected to the user plane function (user plane function, UPF ) The network elements are connected through the NR-U interface.

It should be understood that, in this application, the first network device and the second network device are connected through an Xn interface. It should be noted that if this solution is applied to a DC scenario, the first network device is a master node (masternode, MN), and the second network device is a secondary node (secondary node, SN).

The technical solutions provided by the embodiments of the present application are applicable to various system architectures. The network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. For the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

Optionally, each network element (such as the first network device 10, the second network device 20, the terminal device 30, etc.) in FIG. A functional module in the , which is not specifically limited in this embodiment of the present application. It can be understood that the above function can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).

For example, each device in FIG. 4 can be implemented by the communication device 600 in FIG. 6 . FIG. 6 is a schematic diagram of a hardware structure applicable to a communication device provided by an embodiment of the present application. The communication device 600 includes at least one processor 601 , a communication line 602 and at least one communication interface 604 .

The processor 601 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more devices used to control the execution of the program program of this application. integrated circuit.

Communication line 602 may include a pathway for communicating information between the above-described components.

The communication interface 604 is any device such as a transceiver (such as an antenna), and is used to communicate with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (wireless local area networks, WLAN) and so on.

Optionally, the communication device 600 further includes a memory 603, the memory 603 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, and a random access memory (random access memory, RAM) or other types of dynamic storage devices that can store information and instructions, and can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory, CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store instructions or data desired program code in structural form and any other medium that can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor through the communication line 602 . Memory can also be integrated with the processor. The memory provided by the embodiment of the present application may generally be non-volatile. Wherein, the memory 603 is used to store computer-executed instructions for implementing the solutions of the present application, and the execution is controlled by the processor 601 . The processor 601 is configured to execute computer-executed instructions stored in the memory 603, so as to implement the methods provided in the following embodiments of the present application.

Optionally, the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes, which is not specifically limited in the embodiments of the present application.

In a possible implementation manner, the processor 601 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 6 .

In a possible implementation manner, the communication device 600 may include multiple processors, for example, the processor 601 and the processor 607 in FIG. 6 . Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).

In a possible implementation manner, the communication apparatus 600 may further include an output device 605 and an input device 606 . Output device 605 is in communication with processor 601 and can display information in a variety of ways. For example, the output device 605 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector) wait. The input device 606 communicates with the processor 601 and can receive user input in various ways. For example, the input device 606 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The aforementioned communication device 600 may be a general-purpose device or a special-purpose device. In a specific implementation, the communication device 600 may be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or a device having a structure similar to that shown in FIG. 6 . The embodiment of the present application does not limit the type of the communication device 600 .

The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.

Referring to FIG. 7 , FIG. 7 is a schematic flowchart of a communication method provided by an embodiment of the present application. Wherein, the first network device in FIG. 7 can be the first network device 10 in FIG. 4, the second network device in FIG. 7 can be the second network device 20 in FIG. 4, and the terminal device in FIG. 7 can be Terminal device 30 in FIG. 4 . As shown in Figure 7, the method includes but is not limited to the following steps:

701. The first network device sends a first request message to the second network device, where the first request message is used to request assistance information of a first cascade, where the first cascade includes a PDCP cascade or an SDAP cascade.

Correspondingly, the second network device receives the first request message from the first network device.

Optionally, if the first concatenation is PDCP concatenation, the assistance information of the first concatenation includes the assistance information of the PDCP concatenation of the first radio bearer; if the first concatenation is SDAP concatenation, the assistance information of the first concatenation The information includes auxiliary information of SDAP concatenation of the first radio bearer, and the first request message further includes an identifier of the first radio bearer.

Optionally, the first radio bearer may be a split (split) radio bearer, a duplicated (duplicated) radio bearer, etc., which are not limited here.

Optionally, the auxiliary information of PDCP concatenation or SDAP concatenation of the first radio bearer includes one or more of the following: the number of data packets included in the concatenation data packets transmitted by the first radio bearer; The size of the concatenated packet; the load of the second network device. The load of the second network device may include processing efficiency of a central processing unit (central processing unit, CPU) of the second network device, resource allocation information of the second network device, etc., which are not limited here.

Exemplarily, the number of data packets included in the concatenated data packets transmitted by the first radio bearer may be 10, and the size of the concatenated data packets transmitted by the first radio bearer may be 5000 bits (bits).

Optionally, the first radio bearer may be one or more radio bearers, which is not limited here. It can be understood that, if the first radio bearer is multiple radio bearers, the first concatenated auxiliary information includes PDCP concatenation or SDAP concatenation auxiliary information of each radio bearer in the multiple radio bearers. Wherein, if the first concatenation is PDCP concatenation, the auxiliary information of the first concatenation includes the auxiliary information of PDCP concatenation of each radio bearer among the plurality of radio bearers; if the first concatenation is SDAP concatenation, the first concatenation The concatenated auxiliary information includes SDAP concatenated auxiliary information of each radio bearer in the plurality of radio bearers.

Wherein, the auxiliary information of PDCP concatenation or SDAP concatenation of each radio bearer may include one or more of the following: the number of data packets included in the concatenation data packets transmitted by each radio bearer; Concatenated packet size; load on second network device.

It can be seen that in the above technical solution, by sending the identifier of the first radio bearer to the first network device, the first network device can perform PDCP concatenation or SDAP concatenation on the data packets transmitted by the first radio bearer according to the configuration information. , so that small data packets can be cascaded into larger data packets, thereby reducing the L2 overhead during transmission.

Optionally, the first request message further includes a Qos parameter. Wherein, the Qos parameter may include one or more of the following: time delay and packet loss rate, which are not limited here.

It can be seen that in the above technical solution, because the first request message also includes the Qos parameter, the first network device can determine the configuration information in combination with the Qos parameter, realizing the determination of the PDCP cascade or SDAP level in the case of negotiation between different devices. The cascading configuration information makes the configuration information meet the requirements of different devices for PDCP cascading or SDAP cascading, thereby realizing more reliable PDCP cascading or SDAP cascading.

Optionally, the first request message further includes first indication information, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first RLC, and the transmission mode of the first RLC does not allow segmentation or meets Fragmentation is not allowed by default. It can be understood that the transmission mode of the first RLC does not allow segmentation, that is, the transmission mode of the first RLC has no segmentation function; the transmission mode of the first RLC does not allow segmentation if the preset condition is met, that is, the first RLC The transfer mode has enhanced segmentation capabilities. The enhancement of segmentation function refers to the function of avoiding re-segmentation.

Wherein, the transmission mode of the first RLC may also include an ARQ function.

Optionally, the preset condition includes one or more of the following: the size of the concatenated data packet transmitted by the first radio bearer is less than or equal to the first threshold; the number of times the concatenated data packet transmitted by the first radio bearer is segmented greater than or equal to the second threshold. Wherein, the concatenated data packet transmitted by the first radio bearer may include the segmented remaining concatenated data packet transmitted by the first radio bearer.

Exemplarily, the concatenated data packet transmitted by the first radio bearer is an RLC SDU, and the RLC SDU is 6000 bits. The RLC segment obtained by the first segment is 5000 bits, and the remaining RLC segment is 1000 bits, that is, the remaining concatenated data packets transmitted by the first radio bearer after segmenting are 1000 bits. If the first threshold is 1500, then the size of the segmented remaining concatenated data packets transmitted by the first radio bearer is smaller than 1500, therefore, the segmented remaining concatenated data packets transmitted by the first radio bearer are no longer to segment.

It can be seen that in the above technical solution, by sending the first indication information to the second network device, the second network device does not segment or process the data packets transmitted by the first radio bearer that have undergone PDCP concatenation or SDAP concatenation. Segmentation is not performed when the preset conditions are met, which avoids the problem of increased L2 overhead caused by segmentation or too many segments.

702. The second network device sends a first response message to the first network device, where the first response message includes first concatenated auxiliary information.

Correspondingly, the first network device receives the first response message from the second network device.

Optionally, after the second network device receives the first request message from the first network device, the second network device may generate auxiliary information for the first concatenation according to the capability of the second network device for PDCP concatenation or SDAP concatenation, that is, , the second network device may determine the auxiliary information of the first concatenation. In other words, the auxiliary information of the first concatenation is generated according to the PDCP concatenation or SDAP concatenation capability of the second network device. It can be understood that after the second network device generates first concatenated auxiliary information according to the PDCP concatenation or SDAP concatenation capability of the second network device, the second network device may send the first response message to the first network device.

703. The terminal device receives configuration information of the first cascade from the first network device, where the configuration information of the first cascade is determined according to the auxiliary information of the first cascade.

Correspondingly, the first network device sends configuration information of the first cascade to the terminal device.

Wherein, the configuration information of the first concatenation may be used to configure PDCP concatenation or SDAP concatenation of the first radio bearer. If the first concatenation is PDCP concatenation, the configuration information of the first concatenation can be used to configure the PDCP concatenation of the first radio bearer; if the first concatenation is SDAP concatenation, the configuration information of the first concatenation can be used for Configure SDAP cascading for the first radio bearer.

Wherein, the auxiliary information of the first cascade may be the same as or different from the configuration information of the first cascade, which is not limited here.

Optionally, sending the configuration information of the first cascade to the terminal device by the first network device may include: sending the configuration information of the first cascade to the second network device by the first network device, and sending the configuration information of the first cascade to the terminal device by the second network device. Concatenated configuration information.

It can be seen that in the above technical solution, by sending the first request message requesting the auxiliary information of PDCP concatenation or SDAP concatenation to the second network device, the second network device sends the auxiliary information to the first network device, and then can Determine the configuration information of PDCP cascading or SDAP cascading according to the auxiliary information, and send the configuration information to the terminal device, which realizes the determination of the configuration information of PDCP cascading or SDAP cascading in the case of negotiation between different devices, so that the configuration information It can meet the requirements of different devices for PDCP cascading or SDAP cascading, thus realizing more reliable PDCP cascading or SDAP cascading.

Optionally, the method may further include: the first network device sending first indication information to the terminal device, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the first radio link control RLC transmission mode. An RLC transmission mode does not allow segmentation or does not allow segmentation when a preset condition is met. It can be understood that the first network device may send the first concatenation configuration information and the first indication information to the terminal device at the same time, or the first network device may first send the first concatenation configuration information to the terminal device, and then send the first concatenation configuration information to the terminal device. The device sends the first indication information, or, the first network device may first send the first indication information to the terminal device, and then send the first cascade configuration information to the terminal device, which is not limited here.

It can be seen that in the above technical solution, by sending the first indication information to the terminal device, the terminal device does not perform segmentation processing on the data packet transmitted by the first radio bearer that has undergone PDCP concatenation or SDAP concatenation or meets the preset requirements. Segmentation processing is not performed under certain conditions, which avoids the problem of increased L2 overhead caused by segmentation or excessive segmentation.

Optionally, the method further includes: the first network device sends a first uplink grant to the terminal device; the first network device sends and receives second indication information from the terminal device, the second indication information is sent according to the first uplink grant, and the second indication The information is used to indicate that the concatenated data packet to be transmitted corresponding to the first radio bearer cannot be transmitted through the first uplink grant; the first network device sends the second uplink grant to the terminal device according to the second indication information; the first network device sends the second uplink grant through the second The uplink authorization receives the concatenated data packet to be transmitted from the terminal device.

Wherein, the concatenated data packet to be transmitted may be an RLC SDU to be transmitted or an RLC segment to be transmitted, which is not limited here. That is, the second indication information is used to indicate that the RLC SDU or the RLC segment to be transmitted cannot be transmitted through the first uplink grant (whether RLC SDU or segment cannot be accommodated by a grant size).

Optionally, the second indication information may further include one or more of the following: a logical channel identifier corresponding to the concatenated data packet to be transmitted; a size of the concatenated data packet to be transmitted. Wherein, the second uplink grant is determined according to the size of the concatenated data packet to be transmitted. For example, the size of the second uplink grant is greater than or equal to the size of the concatenated data packet to be transmitted.

Optionally, the second indication information may further include a message type of the concatenated data packet to be transmitted, and the message type of the concatenated data packet to be transmitted may be a control plane message.

Exemplarily, after the terminal device receives the first indication information from the first network device, the terminal device may perform PDCP concatenation or SDAP concatenation processing on the first data packet and the second data packet transmitted on the first radio bearer, to obtain The first concatenated data packet; the terminal device can perform PDCP concatenation or SDAP concatenation processing on the third data packet and the fourth data packet transmitted on the first radio bearer to obtain the second concatenated data packet; the terminal device can also obtain the second concatenated data packet according to The first indication information processes the first concatenated data packet and the second concatenated data packet to obtain the processed first concatenated data packet and the second concatenated data packet. After the terminal device receives the first uplink grant from the first network device, the terminal device may group the processed first concatenated data packets according to the first uplink grant, and send the group packet through the first uplink grant. It can be understood that the terminal device may also group the concatenated data of different logical channels with the processed first concatenated data packet. As for the second concatenated data packet, since the size of the first uplink grant cannot transmit the complete second concatenated data packet, the terminal device may choose not to send the second concatenated data packet. Because the second concatenated data packet does not meet the preset condition, the terminal device also does not choose to segment the second concatenated data packet. In this case, the terminal device may send the second indication information to the first network device.

It can be seen that, in the above technical solution, by sending the first uplink authorization to the terminal device, the terminal device sends the second indication information to the first network device according to the first uplink authorization, so that the terminal device cannot transmit information based on the first uplink authorization. When the concatenated data packet is to be transmitted, the second uplink grant is sent to the terminal device, so that the terminal device can send the concatenated data packet to be transmitted through the second uplink grant.

The following uses PDCP cascading as an example to illustrate this embodiment of the present application.

Referring to FIG. 8 , FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application. Wherein, the first network device in FIG. 8 can be the first network device 10 in FIG. 4, the second network device in FIG. 8 can be the second network device 20 in FIG. 4, and the terminal device in FIG. 8 can be Terminal device 30 in FIG. 4 . As shown in Figure 8, the method includes but is not limited to the following steps:

801. The first network device sends a first request message to the second network device, where the first request message is used to request PDCP concatenation assistance information, where the PDCP concatenation assistance information includes PDCP concatenation assistance information of the first radio bearer.

Wherein, for step 801, reference may be made to the relevant description of step 701 in FIG. 7 , and details are not repeated here.

802. The second network device sends a first response message to the first network device, where the first response message includes PDCP concatenation assistance information.

Wherein, for step 802, reference may be made to the description related to step 702 in FIG. 7 , and details are not repeated here.

803. The terminal device receives configuration information of PDCP concatenation from the first network device, and the configuration information of PDCP concatenation is determined according to the auxiliary information of PDCP concatenation.

Wherein, for step 803, reference may be made to the relevant description of step 703 in FIG. 7 , and details are not repeated here.

Wherein, after step 803, this solution may be implemented in any of the following ways. Mode 1, step 804A-step 807A; mode 2, step 804B-step 807B.

804A. If the first radio bearer is an offload radio bearer, the first network device performs PDCP concatenation and offload on multiple data packets transmitted by the offload radio bearer according to the PDCP concatenation configuration information, to obtain the first concatenation data packet and the second offload data packet. Concatenate packets.

Wherein, the first concatenated data packet is a concatenated data packet transmitted through the communication link between the first network device and the terminal device, that is, the first concatenated data packet is a concatenated data packet of the MN link; the second concatenated The data packet is a concatenated data packet transmitted through the communication link between the second network device and the terminal device, that is, the second concatenated data packet is a concatenated data packet of the SN link.

805A. The terminal device receives the first concatenated data packet from the first network device.

Correspondingly, the first network device sends the first concatenated data packet to the terminal device.

806A. The second network device receives a second concatenation data packet from the first network device.

Correspondingly, the first network device sends the second concatenated data packet to the second network device.

807A. The terminal device receives the second concatenation data packet from the second network device.

Correspondingly, the second network device sends the second concatenated data packet to the terminal device.

804B. If the first radio bearer is a repeated radio bearer, the first network device performs PDCP concatenation on multiple data packets transmitted by the offloaded radio bearer according to the PDCP concatenation configuration information to obtain a third concatenated data packet, and the first The network device copies the third concatenated data packet to obtain the fourth concatenated data packet.

Wherein, the third concatenated data packet and the fourth concatenated data packet are the same data packet. It can be understood that the third concatenated data packet is a concatenated data packet transmitted through the communication link between the first network device and the terminal device, that is, the third concatenated data packet is a concatenated data packet of the MN link; the fourth The concatenated data packet is a concatenated data packet transmitted through the communication link between the second network device and the terminal device, that is, the fourth concatenated data packet is a concatenated data packet of the SN link.

805B. The terminal device receives the third concatenated data packet from the first network device.

Correspondingly, the first network device sends the third concatenated data packet to the terminal device.

806B. The second network device receives the fourth concatenated data packet from the first network device.

Correspondingly, the first network device sends the fourth concatenated data packet to the second network device.

807B. The terminal device receives the fourth concatenated data packet from the second network device.

Correspondingly, the second network device sends the fourth concatenated data packet to the terminal device.

It can be seen that in the above technical solution, by sending the first request message requesting PDCP concatenated auxiliary information to the second network device, the second network device sends the auxiliary information to the first network device, and then it can be determined according to the auxiliary information PDCP cascading configuration information, and send the configuration information to the terminal device, realizing the determination of the PDCP cascading configuration information in the case of negotiation between different devices, so that the configuration information can meet the requirements of different devices for PDCP cascading, thereby A more reliable PDCP cascading is realized. In addition, the L2 overhead is saved through the PDCP cascading, which also enables the terminal device to obtain data packets from different network devices.

Referring to FIG. 9 , FIG. 9 is a schematic flowchart of another communication method provided by an embodiment of the present application. Wherein, the first network device in FIG. 9 can be the first network device 10 in FIG. 4, the second network device in FIG. 9 can be the second network device 20 in FIG. 4, and the terminal device in FIG. 9 can be Terminal device 30 in FIG. 4 . As shown in Figure 9, the method includes but is not limited to the following steps:

901. The first network device sends PDCP concatenation configuration information and first indication information to the terminal device, where the first indication information is used to indicate that the transmission mode of the first radio bearer is the first RLC transmission mode.

Correspondingly, the terminal device receives PDCP concatenation configuration information and first indication information from the first network device.

Wherein, for step 901, reference may be made to the relevant description of step 703 in FIG. 7 , and details are not repeated here.

902. The terminal device performs PDCP concatenation processing on the first data packet and the second data packet transmitted on the first radio bearer to obtain the first concatenated data packet, and performs PDCP concatenation processing on the third data packet and the second data packet transmitted on the first radio bearer. The four data packets are subjected to PDCP concatenation processing to obtain a second concatenation data packet.

903. The terminal device processes the first concatenated data packet and the second concatenated data packet according to the first indication information, and obtains the processed first concatenated data packet and the second concatenated data packet.

904. The first network device sends the first uplink grant to the terminal device.

Correspondingly, the terminal device receives the first uplink grant from the first network device.

Wherein, step 904 may be performed before step 903 .

905. The terminal device sends the processed first concatenated data packet to the first network device by using the first uplink grant.

Correspondingly, the first network device receives the processed first concatenated data packet from the terminal device through the first uplink grant.

Wherein, step 905 may be performed after step 906 .

906. The first network device receives second indication information from the terminal device, the second indication information is sent according to the first uplink authorization, and the second indication information is used to indicate that the concatenated data packet to be transmitted corresponding to the first radio bearer cannot pass the first uplink authorization. authorize the transfer.

Correspondingly, the terminal device sends the second indication information to the first network device according to the first uplink grant.

Wherein, for step 906, reference may be made to the relevant description of step 703 in FIG. 7 , and details are not repeated here.

907. The first network device sends the second uplink grant to the terminal device according to the second indication information.

Correspondingly, the terminal device receives the second uplink grant from the first network device.

Wherein, for step 907, reference may be made to the relevant description of step 703 in FIG. 7 , and details are not repeated here.

908. The terminal device sends the processed second concatenated data packet to the first network device through the second uplink grant.

Correspondingly, the first network device receives the processed second concatenated data packet from the terminal device through the second uplink grant.

It can be seen that in the above technical solution, by sending the configuration information of PDCP cascading and the first indication information to the terminal device, the data packets are processed according to the configuration information of PDCP cascading and the first indication information. In the DC scenario, when the terminal device cannot transmit the processed second concatenated data packet through the first uplink authorization, it can send the second indication information to the first network device to request the second uplink authorization, and then based on the second uplink authorization Send the processed second concatenated packet.

In each embodiment of the present application, if there is no special explanation and logical conflict, the terms and/or descriptions between different embodiments are consistent and can be referred to each other, and the technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

The foregoing mainly introduces the solution provided by the present application from the perspective of interaction between various devices. It can be understood that, in order to realize the above-mentioned functions, each of the above-mentioned implementation devices includes corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that, in combination with the modules and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In this embodiment of the present application, the functional modules of the first network device or the second network device can be divided according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one In the processing module, the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of using an integrated module, refer to FIG. 10 , which is a schematic structural diagram of a communication device provided in an embodiment of the present application. The communication device 1000 can be applied to any of the methods shown in FIGS. 7-9 above. As shown in FIG. 10 , the communication device 1000 includes a transceiver module 1001 . The transceiver module 1001 may be a transceiver or a communication interface. The communication apparatus may be used to implement the first network device or the second network device involved in any of the above method embodiments, or be used to implement the functions of the devices involved in any of the above method embodiments. For example, the communication device may be a first network device or a second network device. The first network device or the second network device may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform). Optionally, the communication device 1000 may further include a storage module 1002 for storing program codes and data of the communication device 1000 .

Exemplarily, when the communication device is used as the first network device or as a chip applied in the first network device, the communication device 1000 includes the transceiver module 1001, and executes the steps performed by the network device in the above method embodiments. The transceiver module 1001 is configured to support communication with the terminal device, the second network device, etc., and specifically perform the sending and/or receiving actions performed by the first network device in FIG. 7 or 8 or 9. Add repeat. For example, the first network device is supported to perform one or more steps in step 701, step 801, and/or other processes for the techniques described herein.

Exemplarily, the transceiver module 1001 is configured to send a first request message to the second network device, the first request message is used to request auxiliary information of the first cascade, and the first cascade includes PDCP cascade or SDAP cascade; from The second network device receives the first response message, the first response message includes the auxiliary information of the first cascade; sends the configuration information of the first cascade to the terminal device, and the configuration information of the first cascade is based on the auxiliary information of the first cascade Sure.

Exemplarily, when the communication device is used as the second network device or a chip applied in the second network device, the communication device 1000 includes the transceiver module 1001, and executes the steps performed by the network device in the above method embodiments. The transceiver module 1001 is configured to support communication with the terminal device, the second network device, etc., and specifically perform the sending and/or receiving actions performed by the second network device in FIG. 7 or 8 or 9. Add repeat. For example, the second network device is supported to perform one or more steps in step 702, step 802, and/or other processes for the techniques described herein.

Exemplarily, the transceiver module 1001 is configured to receive a first request message from a first network device, where the first request message is used to request auxiliary information of a first cascade, and the first cascade includes a Packet Data Convergence Protocol PDCP Cascading or service data adaptation protocol SDAP cascading; sending a first response message to the first network device, the first response message including the auxiliary information of the first cascading, the auxiliary information of the first cascading The information is used to determine configuration information of the first cascade.

In a possible implementation manner, when the communication device is a chip, the transceiver module 1001 may be an interface, a pin, or a circuit. The interface can be used to input the data to be processed to the processor, and can output the processing result of the processor. In a specific implementation, the interface can be a general purpose input output (GPIO) interface, which can communicate with multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (radio frequency, RF) module, an antenna, etc. )connect. The interface is connected with the processor through the bus.

The storage module 1002 may be a storage module in the chip, such as a register, a cache, and the like. The storage module can also be a storage module located outside the chip, such as read-only memory (Read Only Memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (Random Access Memory, RAM), etc. .

It should be noted that the respective functions of the processor and the interface can be realized through hardware design, software design, or a combination of software and hardware, which is not limited here.

FIG. 11 is a schematic structural diagram of a simplified terminal device provided by an embodiment of the present application. For ease of understanding and illustration, in FIG. 11 , a mobile phone is taken as an example of a terminal device. As shown in FIG. 11 , the terminal device includes at least one processor, and may also include a radio frequency circuit, an antenna, and an input and output device. Wherein, the processor can be used to process communication protocols and communication data, and can also be used to control terminal equipment, execute software programs, process data of software programs, and the like. The terminal device may also include a memory, which is mainly used to store software programs and data. These related programs can be loaded into the memory when the communication device leaves the factory, or can be loaded into the memory later when needed. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 11 . In an actual terminal device product, there may be one or more processors and one or more memories. A memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In this embodiment of the application, the antenna and radio frequency circuit with transceiver function can be regarded as the receiving unit and the transmitting unit of the terminal equipment (also collectively referred to as the transceiver unit), and the processor with processing function can be regarded as the processing unit of the terminal equipment . As shown in FIG. 11 , the terminal device includes a receiving module 31 , a processing module 32 and a sending module 33 . The receiving module 31 can also be called a receiver, a receiver, a receiving circuit, etc., and the sending module 33 can also be called a transmitter, a transmitter, a transmitter, a transmitting circuit, etc. The processing module 32 may also be called a processor, a processing board, a processing device, and the like.

For example, the processing module 32 is configured to execute functions of the terminal device in the embodiment shown in FIG. 7 or FIG. 8 or FIG. 9 .

FIG. 12 is a schematic structural diagram of a simplified network device provided by an embodiment of the present application. The network equipment includes a radio frequency signal transceiving and converting part and a part 42, and the radio frequency signal transceiving and converting part further includes a receiving module 41 and a sending module 43 (also collectively referred to as a transceiving module). The RF signal transceiver and conversion part is mainly used for the RF signal transceiver and the conversion of the RF signal and the baseband signal; the 42 part is mainly used for the baseband processing, controlling the network equipment, etc. The receiving module 41 can also be called a receiver, a receiver, a receiving circuit, etc., and the sending module 43 can also be called a transmitter, a transmitter, a transmitter, a transmitting circuit, etc. The part 42 is usually the control center of the network device, which can usually be referred to as a processing module, and is used to control the network device to execute the steps performed by the above-mentioned network device in FIG. 4 or FIG. 5 or FIG. 6 or FIG. 7 or FIG. 8 . For details, please refer to the description of the relevant part above.

Part 42 may include one or more single boards, and each single board may include one or more processors and one or more memories, and the processors are used to read and execute programs in the memories to implement baseband processing functions and network equipment control. If there are multiple single boards, each single board can be interconnected to increase the processing capacity. As an optional implementation, it is also possible that multiple single boards share one or more processors, or that multiple single boards share one or more memories, or that multiple single boards share one or more processors at the same time. device.

For example, for a network device, the sending module 43 is configured to execute the function of the network device in the embodiment shown in FIG. 7 or 8 or 9 .

The present application also provides a communication device, including a memory and a processor, and the processor invokes a computer program stored in the memory to implement the method in any possible implementation manner as shown in FIG. 7 or FIG. 8 or FIG. 9 .

The present application also provides another communication device, including a memory and a communication interface, the communication interface is used for inputting and/or outputting information, and the processor is used for executing a computer program, so that the device can perform any possible operation as shown in FIG. 7 or FIG. 8 or FIG. 9 . method in the implementation of .

The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program is run, the method in any possible implementation manner as shown in FIG. 7 or FIG. 8 or FIG. 9 is implemented.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present application. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the above integrated units are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium Among them, several instructions are included to make a computer device (which may be a personal computer, a cloud server, or a network device, etc.) execute all or part of the steps of the above-mentioned methods in various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, and other media that can store program codes. The above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the scope of the technology disclosed in the application. Modifications or replacements, these modifications or replacements shall be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (30)

1. A communication method applied to a first network device, the method comprising:

sending a first request message to a second network device, wherein the first request message is used for requesting auxiliary information of a first cascade, and the first cascade comprises a Packet Data Convergence Protocol (PDCP) cascade or a Service Data Adaptation Protocol (SDAP) cascade;

receiving a first response message from the second network device, the first response message including assistance information of the first cascade;

and sending the configuration information of the first cascade to terminal equipment, wherein the configuration information of the first cascade is determined according to the auxiliary information of the first cascade.

2. The method of claim 1, wherein the first concatenated assistance information comprises PDCP concatenated assistance information for a first radio bearer if the first concatenation is a PDCP concatenation, wherein the first concatenated assistance information comprises SDAP concatenated assistance information for a first radio bearer if the first concatenation is a SDAP concatenation, and wherein the first request message further comprises an identification of the first radio bearer.

3. The method of claim 2, wherein the assistance information for the PDCP concatenation or the SDAP concatenation for the first radio bearer comprises one or more of:

the number of data packets included in the concatenated data packets transmitted by the first radio bearer;

the size of the concatenated packet transmitted by the first radio bearer;

a load of the second network device.

4. The method according to any of claims 1-3, wherein the first request message further comprises a quality of service QoS parameter.

5. The method according to any of claims 1-4, wherein the first request message further comprises first indication information, and the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first Radio Link Control (RLC), and the transmission mode of the first RLC does not allow segmentation or does not allow segmentation if a preset condition is met.

6. The method according to any one of claims 1-5, further comprising:

and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating that the transmission mode of a first radio bearer is the transmission mode of a first Radio Link Control (RLC), and the transmission mode of the first RLC does not allow segmentation or does not allow segmentation under the condition of meeting preset conditions.

7. The method according to claim 5 or 6, wherein the preset conditions comprise one or more of:

the size of the concatenated data packets transmitted by the first radio bearer is less than or equal to a first threshold;

and the number of times of segmenting the concatenated data packets transmitted by the first radio bearer is greater than or equal to a second threshold value.

8. The method according to any one of claims 1-7, further comprising:

sending a first uplink authorization to the terminal equipment;

sending and receiving second indication information from the terminal equipment, wherein the second indication information is sent according to the first uplink authorization, and the second indication information is used for indicating that the cascade data packet to be transmitted corresponding to the first radio bearer cannot be transmitted through the first uplink authorization;

sending a second uplink authorization to the terminal equipment according to the second indication information;

and receiving the cascade data packet to be transmitted from the terminal equipment through the second uplink authorization.

9. The method of claim 8, wherein the second indication information further comprises one or more of:

a logic channel identifier corresponding to the cascade data packet to be transmitted;

the size of the concatenated packet to be transmitted.

10. A method of communication, the method being applied to a second network device, the method comprising:

receiving a first request message from a first network device, the first request message being used for requesting assistance information of a first cascade, the first cascade comprising a Packet Data Convergence Protocol (PDCP) cascade or a Service Data Adaptation Protocol (SDAP) cascade;

sending a first response message to the first network device, where the first response message includes the auxiliary information of the first cascade, and the auxiliary information of the first cascade is used to determine the configuration information of the first cascade.

11. The method of claim 10, wherein the first concatenated assistance information comprises PDCP concatenated assistance information for a first radio bearer if the first concatenation is a PDCP concatenation, wherein the first concatenated assistance information comprises SDAP concatenated assistance information for a first radio bearer if the first concatenation is a SDAP concatenation, and wherein the first request message further comprises an identification of the first radio bearer.

12. The method of claim 11, wherein the assistance information for PDCP concatenation or SDAP concatenation of the first radio bearer comprises one or more of:

the number of data packets included in the concatenated data packets transmitted by the first radio bearer;

the size of the concatenated packet transmitted by the first radio bearer;

a load of the second network device.

13. The method of any of claims 10-12, wherein the first request message further comprises a quality of service Qos parameter.

14. The method according to any of claims 10-13, wherein the first request message further comprises first indication information, and the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the transmission mode of the first RLC does not allow segmentation or does not allow segmentation if a preset condition is met.

15. A communication apparatus, characterized in that the apparatus comprises a transceiver module for

Sending a first request message to a second network device, wherein the first request message is used for requesting auxiliary information of a first cascade, and the first cascade comprises a Packet Data Convergence Protocol (PDCP) cascade or a Service Data Adaptation Protocol (SDAP) cascade;

receiving a first response message from the second network device, the first response message including assistance information of the first cascade;

and sending the configuration information of the first cascade to terminal equipment, wherein the configuration information of the first cascade is determined according to the auxiliary information of the first cascade.

16. The apparatus of claim 15, wherein the assistance information of the first concatenation comprises assistance information of a PDCP concatenation of a first radio bearer if the first concatenation is a PDCP concatenation, wherein the assistance information of the first concatenation comprises assistance information of an SDAP concatenation of a first radio bearer if the first concatenation is an SDAP concatenation, and wherein the first request message further comprises an identification of the first radio bearer.

17. The apparatus of claim 16, wherein assistance information for PDCP concatenation or SDAP concatenation of the first radio bearer comprises one or more of:

the number of data packets included in the concatenated data packets transmitted by the first radio bearer;

the size of the concatenated packet transmitted by the first radio bearer;

a load of the second network device.

18. The apparatus of any of claims 15-17, wherein the first request message further comprises a quality of service Qos parameter.

19. The apparatus of any one of claims 15 to 18, wherein the first request message further comprises first indication information, and wherein the first indication information is used to indicate that the transmission mode of the first radio bearer is a transmission mode of a first Radio Link Control (RLC), and wherein the transmission mode of the first RLC does not allow segmentation or does not allow segmentation if a preset condition is met.

20. The apparatus of any one of claims 15-19,

the transceiver module is further configured to send first indication information to the terminal device, where the first indication information is used to indicate that a transmission mode of a first radio bearer is a transmission mode of a first radio link control RLC, and the transmission mode of the first RLC does not allow segmentation or does not allow segmentation when a preset condition is met.

21. The apparatus of claim 19 or 20,

the preset conditions include one or more of the following:

the size of the concatenated data packets transmitted by the first radio bearer is less than or equal to a first threshold;

and the number of times of segmenting the concatenated data packets transmitted by the first radio bearer is greater than or equal to a second threshold value.

22. The apparatus of any of claims 15-21, wherein the transceiver module is further configured to transmit and receive data to and from the wireless device

Sending a first uplink authorization to the terminal equipment;

sending and receiving second indication information from the terminal equipment, wherein the second indication information is sent according to the first uplink authorization, and the second indication information is used for indicating that the cascade data packet to be transmitted corresponding to the first radio bearer cannot be transmitted through the first uplink authorization;

sending a second uplink authorization to the terminal equipment according to the second indication information;

and receiving the cascade data packet to be transmitted from the terminal equipment through the second uplink authorization.

23. The apparatus of claim 22, wherein the second indication information further comprises one or more of:

a logic channel identifier corresponding to the cascade data packet to be transmitted;

the size of the concatenated packet to be transmitted.

24. A communication apparatus, characterized in that the apparatus comprises a transceiver module for

Receiving a first request message from a first network device, the first request message being used for requesting assistance information of a first cascade, the first cascade comprising a Packet Data Convergence Protocol (PDCP) cascade or a Service Data Adaptation Protocol (SDAP) cascade;

sending a first response message to the first network device, where the first response message includes the first concatenated auxiliary information, and the first concatenated auxiliary information is used to determine the first concatenated configuration information.

25. The apparatus of claim 24, wherein the assistance information of the first concatenation comprises assistance information of a PDCP concatenation of a first radio bearer if the first concatenation is a PDCP concatenation, wherein the assistance information of the first concatenation comprises assistance information of an SDAP concatenation of a first radio bearer if the first concatenation is an SDAP concatenation, and wherein the first request message further comprises an identification of the first radio bearer.

26. The apparatus of claim 25, wherein assistance information for PDCP concatenation or SDAP concatenation of the first radio bearer comprises one or more of:

the number of data packets included in the concatenated data packets transmitted by the first radio bearer;

the size of the concatenated packet transmitted by the first radio bearer;

a load of the second network device.

27. The apparatus of any of claims 24-26, wherein the first request message further comprises a quality of service Qos parameter.

28. The method according to any of claims 24-27, wherein the first request message further comprises first indication information, and the first indication information is used to indicate that the transmission mode of the first radio bearer is the transmission mode of the first radio link control RLC, and the transmission mode of the first RLC does not allow segmentation or does not allow segmentation if a preset condition is met.

29. A communications device comprising a processor and a memory, the processor invoking a computer program stored in the memory to implement the method of any one of claims 1-14.

30. A computer-readable storage medium, in which a computer program is stored which, when being executed, carries out the method according to any one of claims 1-14.

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