CN113923729A

CN113923729A - Data processing method, device and equipment of functional entity

Info

Publication number: CN113923729A
Application number: CN202010645747.8A
Authority: CN
Inventors: 孙军帅; 刘光毅; 黄宇红
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2022-01-11

Abstract

The embodiment of the invention provides a data processing method, a device and equipment of a functional entity, wherein the data processing method comprises the following steps: the first functional entity of layer three L3 sends data to the L2. The scheme of the invention realizes the data processing of the first functional entity of layer three.

Description

Data processing method, device and equipment of functional entity

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for processing data of a functional entity.

Background

Aiming at the design target of the ultra-simple Network (Lite Network) of the next generation mobile communication, it is proposed to introduce a User Plane function (User Plane) at L3 for data processing.

An UP function (User Plane: User Plane) is introduced into L3(Layer 3: RRC Layer of AS Layer in Layer 3, 5G system is called 3-Layer protocol) of AS Layer (Access Stratum: Access Layer). In a 3G/4G/5G system, only the Control Plane (CP) at the AS layer (RRC protocol layer for the network side) at the terminal side, i.e., only the RRC protocol layer (or sub-layer). The rrc (radio Resource control) protocol layer completes the radio Resource control function without the data processing function of the UP plane.

The existing Packet Processing function (Packet Processing) of L2 of the AS layer is redesigned, and the new Packet Processing function of L2 mainly bears the characteristic of the upper layer service data and combines the channel characteristic of the lower layer air interface to form a QoS index and operation giving consideration to the air interface and service characteristics.

For RRC, in addition to the conventional radio resource management function, an UP function based on L3 is added to control the packet processing function of L2. For MAC, a real-time scheduling and control function for the packet processing function of L2 is added, as shown in fig. 1. Fig. 1 is a functional diagram of an AS layer protocol stack of next generation communication 6G.

The UP of L3 of the AS layer has a function of sending IP packets for the first time or more than once. With the introduction of the UP function of L3, the existing data processing functions of L2 need to be redefined.

The introduction of L3UP brings a new way of AS layer data processing, and can realize seamless and lossless forwarding of data when a user moves.

In the current 5G access network, it is proposed to implement Seamless (Seamless) Forwarding of Data in a DC (Dual Connectivity: Dual Connectivity) manner, and implement lossless handover in a Data Forwarding (Data Forwarding) manner for Data packets in RLC AM mode. Obviously, seamless handover is achieved through a DC mode, which requires that a terminal first has a capability of supporting DC, and meanwhile, a DC link needs to be established between a source cell and a destination cell during handover, and the DC link is deleted after handover is completed, so that complexity of signaling control is brought, and a new implementation is brought. Only data forwarding is performed on the data packet in the RLC AM mode, so that lossless switching of data in the RLC UM mode cannot be realized, that is, lossless switching of all data packets cannot be realized. In the high real-time service supported by 5G, the RLC UM mode is exactly needed to reduce the delay.

Disclosure of Invention

The invention provides a data processing method, a data processing device and data processing equipment of a functional entity. The user plane functionality of L3 may be implemented.

To solve the above technical problem, an embodiment of the present invention provides the following solutions:

a method of data processing of a functional entity, the method comprising:

the first functional entity of layer three L3 sends data to the L2.

Optionally, the first functional entity of L3 sends data to the L2, including at least one of: the first functional entity of the L3, receiving data packets from the upper layer of the L3;

and the first functional entity of the L3 sends the data packets to the L2 according to a preset sequence.

Optionally, the sending, by the first functional entity of L3, the data packet to L2 according to a preset order includes:

the first functional entity of L3 transmits packets to L2 in the order of reception of the packets received from the upper layer.

Optionally, the data processing method of the functional entity further includes one of:

if the first functional entity of the L3 receives the message that the data packet fed back by the L2 has been correctly received by the receiving end device, releasing the data packet;

if the first functional entity of the L3 receives the message that the reception of the data packet fed back by the L2 by the receiving end device is unsuccessful, the data packet continues to be cached.

Optionally, sending the data packet to the L2 includes:

the first functional entity of the L3 sends the sequence number of the packet together with the corresponding packet to the medium access control MAC of the L2.

Optionally, after the first functional entity of L3 receives the unsuccessful reception message of the data packet fed back by L2 by the receiving end device or the request for retransmitting the data packet, the method further includes:

and retransmitting the data packet to the L2, wherein the data packet is buffered by the first functional entity of the L3 after receiving the data packet transmitted by the upper layer.

Optionally, the data processing method of the functional entity further includes:

after receiving the MAC service data unit MAC SDU sent by L2, the first functional entity of L3 sorts at least one packet data unit PDU included in the MAC SDU according to a preset order;

and the first functional entity of the L3 sends the target SDU including at least one PDU to an upper layer of the L3 according to the preset order, where the target SDU is an SDU of the first functional entity.

Optionally, the sorting at least one PDU included in the MAC SDU according to a preset order includes:

receiving at least one PDU included in the MAC SDU in a receiving window according to the sequence number of the PDU;

and sequencing the at least one PDU according to the sequence number of the PDU.

when the first functional entity of L3 is handed over, the first link between the first functional entity of L3 and the MAC of L2 is handed over from the source first link to the target first link, and the second link between the MAC of L2 and L1 is handed over from the source second link to the target second link.

Optionally, switching the first link between the first functional entity of L3 and the MAC of L2 from the source first link to the target first link includes:

the first functional entity of L3 sends the data packet received from the upper layer and the sending status parameter of the data packet to the target first functional entity; the data packet includes: the method includes the steps that at least one of a data packet which is successfully transmitted and waits for retransmission is not transmitted to the receiving end device, a data packet which is transmitted but not confirmed by the receiving end device, and a data packet which is received from an upper layer but not entered into a transmission process yet.

Optionally, when the handover occurs at L2, the second link between the MAC of L2 and L1 is handed over from the source second link to the target second link, and the first link between L2 and the L3 remains unchanged.

Optionally, the handover of L2, or the handover of the first functional entity of L3, is triggered by a control plane CP function entity of L3 or by a control plane CP entity of L2.

Optionally, the control plane function CP entity triggered switching of L3 includes: and initiating the switching of the L3 according to the measurement of the terminal and the deployment form of the network equipment.

Optionally, the handover triggered by the control plane CP entity of L2 includes: and the MAC of the L2 initiates the switching of the L2 when at least one of a carrier, a beam and a physical cell of data transmitted by the terminal needs to be replaced according to the air interface characteristics of the terminal during scheduling.

The embodiment of the invention also provides a data processing method of the functional entity, which comprises the following steps:

and the layer two L2 receives the data sent by the first functional entity of the L3.

Optionally, the receiving, by the L2, data sent by the first functional entity of L3 includes:

and the L2 receives the data packets sent by the first functional entity of the L3 according to a preset sequence.

and the MAC entity of the L2 reconstructs the received data packet into a MAC PDU data packet according to the instruction of the scheduler.

The MAC PDU packet is sent to layer one L1.

if the receiving end device successfully receives the data packet, the MAC entity of L2 feeds back a message that the data packet has been correctly received to the first functional entity of L3;

if the receiving end device does not successfully receive the data packet, the MAC entity of L2 feeds back a message of unsuccessful reception to the first functional entity of L3.

Optionally, after feeding back the message of unsuccessful reception to the first functional entity of L3, the method further includes:

the MAC entity of the L2 receives the retransmission of the data packet by the first functional entity of the L3;

and the MAC entity of the L2 reconstructs the data packet received again into the MAC PDU data packet according to the indication of the scheduling result of the scheduler.

if the MAC entity of the L2 fails to successfully send the MAC PDU data packet to the L1, the related information of the MAC PDU data packet which is not successfully sent is sent to the first functional entity of the L3, and the related information is sent by the first functional entity of the L3 on a new link or to a target first functional entity for further sending; alternatively, the first and second electrodes may be,

and the MAC entity of the L2 directly transmits the MAC PDU data packet which is not successfully transmitted to the target MAC, and continues transmitting on the target MAC.

Optionally, the handover of L2 is triggered by the control plane CP entity of L2.

Optionally, the handover triggered by the control plane CP entity of L2 includes: and the MAC entity of the L2 initiates the switching of the L2 when at least one of a carrier, a beam and a physical cell of data sent by the terminal needs to be replaced according to the air interface characteristics of the terminal during scheduling.

Optionally, the MAC entity of L2 sends the target physical cell information to the CP entity of L3, and notifies the receiving end through an air interface signaling of the CP entity of L3, so as to synchronously initiate configuration of the target physical cell; after the air interface signaling configuration of the CP entity of L3 is completed, the MAC initiates the switching of the physical link; or

The MAC directly controls or triggers the PDCCH, and after the reselection of the physical cell information is successful, sends the information to the CP entity of L3 to synchronize the control information.

The embodiment of the present invention further provides a data processing apparatus of a functional entity, which is applied to layer three L3, and the apparatus includes:

and the transceiving module is used for transmitting data to the L2 through a first functional entity of a layer three L3.

The embodiment of the present invention further provides a data processing apparatus of a functional entity, which is applied to layer two L2, and the apparatus includes:

and the transceiving module is used for receiving the data transmitted by the first functional entity of the L3 through a layer two L2.

An embodiment of the present invention further provides a communication device, including: layer three L3 and layer two L2, including:

a transceiver to transmit data to the L2 through a first functional entity of layer three L3.

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.

Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The scheme of the invention at least comprises the following beneficial effects:

in the above solution of the present invention, the first functional entity of L3, where the first functional entity may be a user plane UP functional entity; the first functional entity of the L3 sends data to the L2. Therefore, the user plane function UP of L3 can be realized, and the data packets are continuously transmitted on the destination link when the user switches through the flexible connection link mode between the UP entity of L3 and L2, thereby realizing the seamless switching of all data.

Drawings

FIG. 1 is a functional diagram of an AS layer protocol stack;

FIG. 2 is a flow chart illustrating a data processing method of a functional entity;

FIG. 3 is a diagram of two-stage handover under RRC/MAC control.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following embodiments of the present invention, L1 is layer one, L2 is layer two, and L3 is layer three; wherein, L1 is a physical layer, L2 is a MAC layer (medium access control), and L3 is located above L2;

wherein, UP: (User Plane ), a generic term for the relevant functions of processing data;

and (3) CP: (Control Plane), handling the signaling and Control related functional totality;

the MAC layer positioned on the second layer has a data processing function and a control function at the same time, namely the MAC has the functions of CP and UP at the same time;

the CP of the MAC is mainly oriented to real-time control of air interface radio resources, i.e., the function of the MAC scheduler; the UP of the MAC faces to an air interface, and the receiving and sending of air interface data are realized under the instruction of a scheduler.

The RRC positioned at the layer three is a control function; the newly introduced UP of layer three is the data processing function of layer three.

A two-stage user handover scheme based on L3UP and MAC data processing functions under RRC (collectively referred to as L3CP) and MAC control to achieve seamless and lossless handover.

As shown in fig. 2, a data processing method of a functional entity, the method includes:

step 21, a first functional entity of layer three L3 sends data to the L2; the first functional entity here, defining the data processing function at L3, can receive data packets from its upper layer and after processing in the first functional entity of L3 send to L2, similar to the user plane UP functional entity.

In this embodiment, the UP function of L3 can be realized, and by the flexible link connection mode between the UP entity of L3 and L2, when a user switches, a data packet is continuously transmitted on a destination link, thereby realizing seamless switching of all data.

In an alternative embodiment of the present invention, step 22 may include at least one of:

step 221, the first functional entity of L3, receiving a data packet from the upper layer of L3;

step 222, the first functional entity of L3 sends the data packet to L2 according to a preset sequence.

Specifically, in step 222, the first functional entity of L3 has a function of sorting received data packets, and the first functional entity of L3 sends the data packets to L2 according to the receiving order of the data packets received from the upper layer.

In an optional embodiment of the present invention, a data processing method of a functional entity further includes at least one of:

Specifically, after receiving a data packet sent by an upper layer, the UP entity of L3 may directly send the data packet to L2, or may buffer the data packet, so that when receiving no feedback of successful reception of the receiving end device, the buffered data packet may be sent to L2 again; optionally, the UP entity of L3 buffers each data packet (for example, an IP data packet) sent to L2, and buffers the data packet until the "Acknowledgement (ACK) of successful transmission of the data packet" sent from L2 is not received. The data packets are buffered according to the order of transmission to the lower layers. Namely, a sending data packet buffer is set, a data packet sending indication sent by a lower layer is waited, and if the indication is ACK (confirmation, namely the data packet is successfully sent and successfully received by an opposite end), the data packet is released; if the indication is NACK (non-acknowledgement, i.e. the packet was sent with failure and not received successfully by the peer), the buffering of the packet is continued.

In an alternative embodiment of the present invention, sending the data packet to the L2 includes:

In an optional embodiment of the present invention, the UP entity of L3 further has a packet retransmission function: if the first functional entity of L3 receives the message that the data packet fed back by L2 was unsuccessfully received by the receiving end device or the request for retransmitting the data packet, the method may further include: and retransmitting the data packet to the L2, wherein the retransmitted data packet is buffered when the first functional entity of the L3 receives the data packet from an upper layer.

Specifically, when receiving that the data transmission indication of the lower layer is NACK, the corresponding buffered data packet is retransmitted.

In an optional embodiment of the present invention, the data processing method of the functional entity may further include:

In an optional embodiment of the present invention, the sorting at least one PDU included in the MAC SDU according to a preset order includes:

Specifically, after receiving the data packet transmitted from the L2, the UP entity of L3 orders the data packets to obtain an order identical to the transmission order transmitted from the sender, and then delivers the data packets to the upper layer according to the order. The usual ordering method is: the sender provides a Sequence Number (SN) for each data packet and sets a sending window; the receiver sets a receiving window, receives the data packets according to the sequence number and sorts the data packets. And setting a receiving buffer, and suspending the data packet when the data packet is not sorted.

To achieve seamless handover, the parameters of the receive and transmit windows, and the SN number of each IP stream cannot be cleared or reset (set all parameters to initial values). When the L3UP entity needs to be replaced, the values of these parameters are transmitted exactly the same to the UP entity of the target L3.

In an optional embodiment of the present invention, the UP entity of L3 further has a packet forwarding function, and the data processing method of the functional entity may further include:

The first link between the first functional entity of L3 and the MAC of L2 is handed over from the source first link to the target first link, comprising:

When a handover occurs at L2, the second link between the MAC of L2 and L1 is handed over from the source second link to the target second link, and the first link between L2 and the L3 remains unchanged.

The control plane function (CP) entity triggered switching of the L3 comprises the following steps: and initiating the switching of the UP entity of the L3 according to the measurement of the terminal and the deployment form of the network equipment.

The control plane CP entity triggered handover of L2 includes: and the MAC of the L2 initiates the switching of the L2 when at least one of a carrier, a beam and a physical cell of data transmitted by the terminal needs to be replaced according to the air interface characteristics of the terminal during scheduling.

Specifically, when a replacement operation (or a re-establishment operation) is to be performed on the UP entity of L3, it is necessary to transmit all the data packets which have not been successfully transmitted to the new UP entity of L3. The sending end forwards all the data packets and the sending state parameters corresponding to each data packet to the UP entity of the target L3, where the data packets include data packets that have not been sent successfully and are waiting for retransmission, data packets that have been sent but have not received the acknowledgement from the receiving end, and data packets that have been received from the upper layer but have not yet entered the sending process. The receiving end migrates all the packets that cannot be sequentially delivered to the upper layer and the corresponding reception parameters to the UP entity of the destination L3.

In the above embodiment of the present invention, the data packet processing function of the MAC includes functions of creating a newly transmitted data packet, recombining a retransmitted data packet, forwarding a data packet, and the like.

And (3) building a newly transmitted data packet: and according to the indication of the MAC scheduler, establishing newly transmitted MAC PDU.

And (3) recombining the retransmission data packets: and according to the indication of the MAC scheduler, analyzing the data content or the control information content in the retransmitted MAC PDU and reconstructing a new MAC PDU.

Forwarding the data packet: when a MAC is to be replaced (or reestablished), two ways are: 1. the MAC sends unsuccessfully transmitted packet information to L3UP for retransmission by L3UP on the new link or to the destination L3 UP. 2. The MAC directly transmits the data packet which is not successfully transmitted to the target MAC, and the data packet is continuously transmitted on the target MAC.

As shown in fig. 3, a schematic diagram of handover under RRC/MAC two-level control is shown. The two-level switching is link switching of the L3 level and link switching of the L2 level. The link is divided into two layers: the connection from the UP entity of L3 to the MAC layer data processing function is called link 1, and the connection from the MAC layer to the air interface via PHY (physical layer) is called link 2.

Link switching at the L3 level requires that link 1 and link 2 switch at the same time. Link switching at the L2 level only requires that link 2 be switched.

The MAC layer determines whether the data packet is successfully transmitted at an air interface according to an acknowledgement mechanism of a Hybrid Automatic Repeat reQuest (HARQ), and when the feedback of the HARQ process is NACK, the data packet is not successfully transmitted; and when the feedback of the HARQ process is ACK, the data packet is successfully sent.

The handover is divided into two types, L3 CP-triggered handover and L2CP (MAC control function) -triggered handover.

The L3CP triggered handover procedure is: when the L3CP initiates the handover process according to the measurement of the terminal and the deployment form of the network device.

The L2CP triggered handover procedure is: when the MAC needs to replace one of a Carrier (Carrier), a beam (beam), a Physical Cell (Physical Cell, which is represented by PCI), a Physical Cell ID (Physical Cell ID) and the like of the UE according to the air interface characteristics such as the Physical channel state of the UE, the error rate of a data packet and the like during scheduling, the MAC initiates the switching of the L2. Two processing modes of MAC: 1. MAC sends the information of the target physical cell to L3CP, informs the receiving end through the air interface signaling of L3CP, and synchronously initiates the configuration of the target physical cell; after the air interface signaling configuration of L3CP is completed, the MAC initiates the switching of the physical link. 2. The MAC directly passes through the Control mode (such as the current MAC CE: Control Element) or triggers PDCCH (physical downlink Control channel); after the physical cell information reselection is successful, the physical cell information reselection is sent to the L3CP to perform control information synchronization.

No matter the handover process triggered by L3CP or the handover process triggered by L2CP, the air interface signaling flow of L3CP is required to ensure the consistency and interaction of the states of the network side and the terminal side.

L3CP is responsible for signaling control for handover. The L3CP on the network side sends to the L3CP on the terminal side through air signaling, and the L3CP on both sides respectively controls the L3UP and the MAC on both sides.

When switching, L3CP determines whether it is switching of the L2 layer or the L3 layer.

If the switching is performed by the L3 layer, the data forwarding function of the L3UP and the sorting function of the received data need to be triggered, and the data processing function of the MAC layer is triggered to send the information of the data packet which is not successfully sent to the L3UP at the same time, so as to forward the data packet by the L3UP, and after the data processing of the L2 is completed, the functional entity of the L2 is deleted or reset to the initial state.

If there is a handover of the L2 layer, at which time the L3 layer has not changed, L3CP indicates whether the source MAC layer releases the source MAC layer or resets the source MAC layer. If the source MAC layer is released, the source MAC layer forwards the data packet (MAC SDU, namely the IP packet of L3 UP) which is not successfully transmitted to the target MAC layer, and transmits the data on the new HARQ process of the target MAC; if the source MAC layer is reset, the source MAC stores the data packet (MAC SDU, i.e., IP packet of L3 UP) which is not successfully transmitted, and continues to transmit the data packet in the new MAC state after the reset operation is completed.

L3UP sends the data to the data processing function of the L2MAC via IP streaming.

To support the data in-sequence sending and in-sequence receiving functions of L3UP, L3UP generates an SN number for each IP packet, where the sequence number may be 4 bytes long, 2 bytes long, or other lengths.

When transmitting a packet to L2, L3UP transmits the SN number to the MAC of L2 together with its corresponding IP packet. The MAC layer includes the SN number in the MAC SDU when constructing the MAC PDU.

When the information of the data packet needs to be exchanged between MAC and L3UP, SN is an identifier for identifying the data packet carried on an IP flow. When the MAC reports the transmission clearance of the data packet to L3UP, the ACK/NACK information, which carries the SN number and the data packet corresponding to the SN, is fed back to L3 UP. L3UP looks up the corresponding packet in the cache based on the SN.

And the SN of the data packet is sent to a receiving end through the MAC PDU, the receiving end obtains the MAC SDU and the SN, and when the SN is sent to the L3UP of the upper layer, the MAC SDU and the SN are sent to a receiving entity of L3UP together, so that the data packet is sequenced.

In the above embodiments of the present invention, in order to implement seamless handover, L3UP needs to have the capability of flexibly selecting L2, that is, when the user changes L2 due to handover, L3UP needs to be able to quickly send data to target L2, which requires that L3UP has a data caching function, L3UP and L2 directly have a simple and quick connection establishment capability, and L3UP has a function of sending and receiving data out of order and then sequentially handing over to an upper layer after sorting.

In order to properly allocate the data volume to each L2 link, the L3UP needs to have a data flow control function, and the proper data volume is allocated to each L2 link according to the actual throughput of each L2 link.

When one L3UP is connected with only one L2 link, the L3UP still needs to carry out flow control and sends data to the L2 according to proper data volume so as to prevent a large amount of data forwarding needed during switching;

when one L3UP connects multiple L2 links at the same time, the flow control function of L3UP achieves accurate distribution of data volume on each L2 link.

When UE switches, the lower layer sends the data information which is not successfully received by the opposite end in the switching process to L3UP, L3UP sends the data packets on the target link, and after the data packets are sent, the next new data packet is sent.

In order to realize lossless handover, L3UP has a data unrestricted retransmission function and a data forwarding function. When the link of the UE moves within the coverage of the air interface device connected to the device with the L3UP deployment function, L3UP retransmits the data packet according to the air interface control information until the lower layer feedback data is successfully transmitted. For example, for a data packet of URLLC type, wireless retransmission is possible, and only one-time transmission is successful, so at this time, a judgment is made according to the QoS parameter (index) of the service, and if retransmission is not required, retransmission is not performed for the data packet of this type. When the link of the UE moves between different devices deploying the L3UP function, the L3UP needs to transfer all data that was not successfully transmitted into the target L3 UP.

The embodiment of the invention provides a data processing method of a functional entity, which is applied to a layer two L2 and comprises the following steps:

and the media access control MAC entity of the L2 reconstructs the received data packet into a MAC PDU data packet according to the instruction of the scheduler.

The MAC PDU packet is sent to layer one L1.

if the MAC entity of the L2 fails to successfully send the MAC PDU data packet to the L1, the related information of the MAC PDU data packet which is not successfully sent is sent to the first functional entity of the L3, and the related information is sent by the first functional entity of the L3 on a new link or to a target first functional entity for further sending; or, the MAC entity of L2 directly sends the MAC PDU packet that is not successfully sent to the target MAC, and continues sending on the target MAC.

The method L2 described in this embodiment is a method corresponding to the method L3, and all the implementations in the above method embodiment are applicable to this method embodiment, and the same technical effects can be achieved.

Optionally, the sending, by the first functional entity of L3, data to the L2 includes:

the first functional entity of the L3, receiving data packets from the upper layer of the L3;

Optionally, the data processing apparatus of the functional entity further includes one of:

Optionally, sending the data packet to the L2 includes:

Optionally, the data processing apparatus of the functional entity further includes:

It should be noted that all the implementations in the above method embodiments are applicable to the embodiment of the apparatus, and the same technical effects can be achieved.

An embodiment of the present invention further provides a communication device, including: layer three, L3, the L3 comprising:

Optionally, the communication device further includes one of:

Optionally, sending the data packet to the L2 includes:

Optionally, the communication device further includes: after receiving the MAC service data unit MAC SDU sent by L2, the first functional entity of L3 sorts at least one packet data unit PDU included in the MAC SDU according to a preset order;

Optionally, the MAC entity of L2 reconstructs the received data packet into a MAC PDU data packet according to the indication of the scheduling result of the scheduler.

The MAC PDU packet is sent to layer one L1.

Optionally, if the receiving end device successfully receives the data packet, the MAC entity of L2 feeds back a message that the data packet has been correctly received to the first functional entity of L3;

An embodiment of the present invention further provides a communication device, including: layer two, L2, the L2 comprising:

a transceiver for receiving data transmitted by the first functional entity of L3 through a layer two L2.

the L2 receives the data packets sent by the first functional entity of the L3 according to a preset sequence.

The MAC PDU packet is sent to layer one L1.

It should be noted that the above-mentioned communication device may be a network side device, or a terminal, and may be a network side device or a terminal, and both the network side device and the terminal may include L3 and L2 as described in the above-mentioned communication device, where the first functional entity of L3 of the network side device receives the data packet transmitted by the upper layer, transmits the data packet to L2 of the network side device, transmits the data packet to L1 of the network side device by L2 of the network side device, and transmits the data packet to the terminal by L1 of the network side device;

after receiving data sent by the L1 layer of the network side device, the L1 on the terminal side sends the data to the L2 on the terminal side, the data is sent to the first functional entity of the L3 of the terminal by the L2 of the terminal, and the data is sent to the upper layer by the first functional entity of the L3 of the terminal;

similarly, the terminal side may also transmit data received by L3 of the terminal to L2 of the terminal, to L1 of the network side device via L1 of the terminal, to L2 of the network side device, to the first functional entity of L3 of the network side device via L2 of the network side device, and to the upper layer.

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above. All the implementation manners in the above method embodiment are applicable to this embodiment, and the same technical effect can be achieved.

Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above. All the implementation manners in the above method embodiment are applicable to this embodiment, and the same technical effect can be achieved.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method of data processing of a functional entity, the method comprising:

the first functional entity of layer three L3 sends data to the L2.

2. The data processing method of the functional entity as claimed in claim 1, wherein the first functional entity of layer three L3 sends data to the L2, including at least one of:

3. The data processing method of the functional entity as claimed in claim 2, wherein the sending of the data packets to the L2 by the first functional entity of the L3 according to a preset order comprises:

4. The data processing method of a functional entity of claim 2, further comprising one of:

5. The data processing method of the functional entity of claim 3, wherein sending the data packet to the L2 comprises:

6. The data processing method of the functional entity of claim 4, wherein after the first functional entity of L3 receives the message that the packet fed back by L2 was unsuccessfully received by the receiving device or the request for retransmitting the packet, the method further comprises:

7. The data processing method of a functional entity of claim 1, further comprising:

8. The data processing method of the functional entity of claim 6, wherein the sorting of the at least one PDU included in the MAC SDU according to a preset order comprises:

9. The data processing method of a functional entity of claim 1, further comprising:

10. The data processing method of the functional entity as claimed in claim 9, wherein the switching of the first link between the first functional entity of L3 and the MAC of L2 from the source first link to the target first link comprises:

11. The data processing method of the functional entity of claim 1, wherein when the handover occurs at L2, the second link between the MAC of L2 and L1 is handed over from the source second link to the target second link, and the first link between L2 and the L3 remains unchanged.

12. The data processing method of the functional entity as claimed in claim 9 or 11, wherein the handover of L2, or the handover of the first functional entity of L3, is triggered by a control plane CP entity of L3 or by a control plane CP entity of L2.

13. The data processing method of the user plane functional entity of claim 12,

the control plane function (CP) entity triggered switching of the L3 comprises the following steps: and initiating the switching of the L3 according to the measurement of the terminal and the deployment form of the network equipment.

14. The data processing method of a functional entity of claim 13,

15. A method of data processing of a functional entity, the method comprising:

16. The data processing method of the functional entity of claim 15, wherein receiving the data sent by the first functional entity of L3 comprises:

17. The data processing method of the functional entity of claim 16, further comprising:

The MAC PDU packet is sent to layer one L1.

18. The data processing method of the functional entity of claim 16, further comprising:

19. The method of claim 18, wherein after feeding back the message of unsuccessful reception to the first functional entity of L3, the method further comprises:

20. The data processing method of the functional entity of claim 17, further comprising:

21. The data processing method of a functional entity of claim 17,

the handover of L2 is triggered by the control plane CP entity of L2.

22. The data processing method of a functional entity of claim 21,

the control plane CP entity triggered handover of L2 includes: and the MAC entity of the L2 initiates the switching of the L2 when at least one of a carrier, a beam and a physical cell of data sent by the terminal needs to be replaced according to the air interface characteristics of the terminal during scheduling.

23. The data processing method of a functional entity of claim 22,

the MAC entity of L2 sends the target physical cell information to the CP entity of L3, informs the receiving end through the air interface signaling of the CP entity of L3, and synchronously initiates the configuration of the target physical cell; after the air interface signaling configuration of the CP entity of L3 is completed, the MAC initiates the switching of the physical link; or

24. A data processing apparatus of a functional entity, applied to layer three L3, the apparatus comprising:

25. A data processing apparatus of a functional entity, applied to layer two L2, the apparatus comprising:

26. A communication device, comprising: layer three L3 and layer two L2, including:

27. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1 to 14 or 15 to 23.

28. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 14 or 15 to 23.