CN114466414A

CN114466414A - Data sending method, data receiving method, user plane processing entity and equipment

Info

Publication number: CN114466414A
Application number: CN202011238734.5A
Authority: CN
Inventors: 王莹莹; 孙军帅; 李娜; 赵芸
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: 2020-11-09
Filing date: 2020-11-09
Publication date: 2022-05-10

Abstract

A data sending method, a data receiving method, a user plane processing entity and equipment are provided, wherein the user plane processing entity comprises: the device comprises a packet control processing module, a Media Access Control (MAC) layer module and a physical layer module. The packet control processing module is used for segmenting a first data packet of the QoS flow received from an upper layer and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet; determining a first DRB or a first logic channel mapped by the first QoS flow according to the mapping relation from the QoS flow to the DRB or the logic channel, and loading the second data packet on the first DRB or the first logic channel; and the MAC layer module is used for mapping the first DRB or the first logic channel to a transmission channel and transmitting the first DRB or the first logic channel through the physical layer module. The invention removes the redundant part in the design of the 5G protocol stack, can simplify the processing flow of the user plane of the access network, reduces the processing cost and improves the processing efficiency.

Description

Data sending method, data receiving method, user plane processing entity and equipment

Technical Field

The invention relates to the technical field of mobile communication, in particular to a data sending method, a data receiving method, a user plane processing entity and equipment.

Background

The access network user plane functionality of the present fifth generation mobile communications (5G) is shown in fig. 1, where:

the Service Data Adaptation Protocol (SDAP) layer is responsible for marking the Quality of Service flow identifiers (QoS flow IDs) of the uplink and downlink packets and mapping the QoS flow onto the DRB.

The functions of a Packet Data Convergence Protocol (PDCP) layer on the Data plane include header compression, encryption and decryption, and integrity protection. Adding a PDCP Sequence (SN) number, reordering and duplicate packet detection, PDCP Service Data Unit (SDU) retransmission, PDCP duplicate packet transmission, PDCP PDU routing in a Split bearer (Split bearer) scenario, PDCP reestablishment and Data recovery in an Acknowledged Mode (Acknowledged Mode, AM) of Radio Link Control (RLC).

The RLC layer mainly functions to add an RLC SN number, perform error correction by an Automatic Repeat request (ARQ) in the AM, segment and reassemble a data packet, detect a duplicate packet in the AM, and the like.

The main functions of the Medium Access Control (MAC) layer include mapping logical channels to transport channels, multiplexing MAC SDUs of the same or multiple logical channels, demultiplexing MAC layer transmissions from the physical layer, dynamically scheduling User Equipment (UE) according to priority, and performing processing of different priorities of the same UE. It can be seen that in the prior art, there are duplication and redundancy with respect to functional design aspects, such as reassembly and multiplexing of data packets; PDCP, RLC and MAC have corresponding SN numbers; the retransmission of RLC ARQ, MAC HARQ and PDCP all retransmits the corresponding data packet, resulting in resource waste.

Disclosure of Invention

At least one embodiment of the present invention provides a data transmission method, a data reception method, and a device, which can simplify a processing procedure of an access network user plane, reduce processing overhead, and improve processing efficiency.

According to an aspect of the present invention, at least one embodiment provides a user plane processing entity of an access network, including: a packet control processing module, a Media Access Control (MAC) layer module and a physical layer module, wherein,

the packet control processing module is used for segmenting a first data packet of a first QoS flow received from an upper layer and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet; determining a first DRB or a first logic channel mapped by the first QoS flow according to the mapping relation from the QoS flow to the data radio bearer DRB or the logic channel, and bearing the second data packet on the first DRB or the first logic channel;

and the MAC layer module is used for mapping the first DRB or the first logic channel to a transmission channel and transmitting the first DRB or the first logic channel through the physical layer module.

In addition, according to at least one embodiment of the present invention, the MAC layer module is further configured to receive a MAC layer transport block sent by the physical layer module, obtain a third data packet, and send the third data packet to the packet control processing module

The packet control processing module is further configured to remove a sequence number included in the third data packet, and reorder the received third data packet according to the sequence number; recombining the reordered third data packet to obtain a fourth data packet; and sending the fourth data packet to an upper layer.

According to another aspect of the present invention, at least one embodiment provides a data transmission method, applied to a first device, including:

segmenting a first data packet of a QoS flow, and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet;

and according to the mapping relation from the QoS flow to the data radio bearer DRB or the logic channel, carrying the second data packet on the corresponding DRB or the logic channel for transmission.

Further, in accordance with at least one embodiment of the present invention, there is also provided:

receiving a status report indicating a reception of the second packet;

and determining the sequence number of the second data packet needing to be retransmitted according to the status report, and retransmitting the corresponding second data packet according to the determined sequence number.

Furthermore, in accordance with at least one embodiment of the present invention, the segmenting the first packet of the quality of service, QoS, flow includes:

and segmenting the first data packet of the QoS flow according to the data packet processing capacity of a Media Access Control (MAC) layer and/or a physical layer of the first equipment.

Furthermore, according to at least one embodiment of the present invention, when the first device is a terminal, the first packet of the QoS flow is a packet generated by an application layer of the terminal;

and when the first device is a base station, the first data packet of the QoS flow is a data packet sent to the base station by a core network.

Further, in accordance with at least one embodiment of the present invention, prior to segmenting the first data packet of the QoS flow, at least one of:

performing header compression processing on a first data packet of the QoS flow;

integrity protection is carried out on the first data packet of the QoS flow by utilizing an integrity protection key;

encrypting a first data packet of the QoS flow by using an encryption and decryption key;

and adding the QoS flow identification to the first data packet of the QoS flow.

According to another aspect of the present invention, at least one embodiment provides a data receiving method, applied to a second device, including:

receiving a third data packet sent by first equipment, removing a sequence number contained in the third data packet, and reordering the received third data packet according to the sequence number;

recombining the reordered third data packet to obtain a fourth data packet;

and sending the fourth data packet to an upper layer.

Furthermore, in accordance with at least one embodiment of the present invention, the reordering the received third data packet according to the sequence number includes:

and reordering the third data packets according to the sequence of the sequence numbers, and discarding the data packets corresponding to the repeated sequence numbers.

and determining the receiving condition of the third data packet according to the reordering result of the third data packet, and sending a status report for indicating the receiving condition of the third data packet to the first equipment.

Furthermore, in accordance with at least one embodiment of the present invention, the sending the fourth packet to an upper layer includes:

determining a target QoS flow corresponding to the DRB or the logic channel for bearing the third data packet according to the mapping relation from the QoS flow to the DRB or the logic channel; or when the fourth data packet carries the QoS flow identifier, acquiring the QoS flow identifier carried in the fourth data packet;

and sending the fourth data packet to an upper layer according to the target QoS flow or the QoS flow identification.

Furthermore, according to at least one embodiment of the present invention, when the second device is a terminal, the upper layer is an application layer of the terminal;

and when the second device is a base station, the upper layer is a core network.

Furthermore, according to at least one embodiment of the present invention, the re-ordering the third data packet to obtain a fourth data packet, which includes at least one of the following:

when the fourth data packet carries the QoS flow identification, removing the QoS flow identification carried in the fourth data packet;

when the fourth data packet is configured with an encryption and decryption function, decrypting the fourth data packet by using an encryption and decryption key;

and when the fourth data packet is configured with an integrity protection function, carrying out integrity check on the fourth data packet of the QoS flow by using an integrity protection key.

According to another aspect of the invention, at least one embodiment provides a first device comprising a processor and a transceiver, wherein,

the processor is used for segmenting a first data packet of a QoS flow and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet;

the transceiver is configured to bear the second data packet on the corresponding DRB or logical channel for transmission according to a mapping relationship from the QoS flow to the data radio bearer DRB or logical channel.

the transceiver is further configured to receive a status report indicating a reception status of the second data packet;

and the processor is further configured to determine a sequence number of the second data packet that needs to be retransmitted according to the status report, and retransmit the corresponding second data packet according to the determined sequence number.

Further, in accordance with at least one embodiment of the present invention, the processor is further configured to:

Further in accordance with at least one embodiment of the present invention, the processor is further configured to, prior to segmenting the first data packet of the QoS flow, perform at least one of:

According to another aspect of the present invention, at least one embodiment provides a first apparatus comprising:

the segmentation processing module is used for segmenting a first data packet of a QoS flow and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet;

and the mapping sending module is used for bearing the second data packet on the corresponding DRB or logical channel for sending according to the mapping relation from the QoS flow to the data radio bearer DRB or logical channel.

In accordance with another aspect of the present invention, at least one embodiment provides a second device comprising a transceiver and a processor, wherein,

the transceiver is used for receiving a third data packet sent by the first device;

the processor is configured to remove a sequence number included in the third data packet, and reorder the received third data packet according to the sequence number; recombining the reordered third data packet to obtain a fourth data packet; and sending the fourth data packet to an upper layer.

Furthermore, in accordance with at least one embodiment of the present invention, the processor is further configured to:

Furthermore, according to at least one embodiment of the present invention, the processor is further configured to, when reassembling the reordered third data packet to obtain a fourth data packet, perform at least one of the following:

According to another aspect of the present invention, at least one embodiment provides a second apparatus comprising:

the receiving processing module is used for receiving a third data packet sent by the first equipment, removing a sequence number contained in the third data packet and reordering the received third data packet according to the sequence number;

the recombination module is used for recombining the reordered third data packet to obtain a fourth data packet;

and the sending module is used for sending the fourth data packet to an upper layer.

According to another aspect of the present invention, at least one embodiment provides a communication apparatus comprising: a processor, a memory and a program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method as described above.

According to another aspect of the invention, at least one embodiment provides a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of the method as described above.

Compared with the prior art, the data sending method, the data receiving method, the user plane processing entity and the device provided by the embodiment of the invention provide the packet control processing module from the idea of simplifying protocol stack processing, and the module removes a redundant part in the design of a 5G protocol stack and simplifies the processing of the user plane of the access network. The embodiment of the invention adopts a uniform reordering mechanism and a uniform serial number to complete the ordering of the data packets, and can reduce the processing overhead compared with the two-layer protocol processing in the prior art. In addition, the embodiment of the invention can directly map the QoS flow, reduces a layer of channel mapping compared with the prior art, can more flexibly process the uplink QoS flow data and reduces the protocol overhead.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of prior art access network user plane functionality;

FIG. 2 is a schematic diagram of an application scenario according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a user plane processing entity of an access network according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a PCP architecture under a service architecture according to an embodiment of the present invention;

fig. 5 is a flowchart of a data transmission method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a transmission process at the first device side according to an embodiment of the present invention;

fig. 7 is a flowchart of a data receiving method according to an embodiment of the present invention;

fig. 8 is a flowchart illustrating a receiving process at the second device side according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first apparatus according to an embodiment of the present invention;

fig. 10 is another schematic structural diagram of the first apparatus according to the embodiment of the present invention;

fig. 11 is a schematic structural diagram of a second apparatus according to an embodiment of the present invention;

fig. 12 is another schematic structural diagram of the second apparatus according to the embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can 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.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The techniques described herein are not limited to NR systems and Long Time Evolution (LTE)/LTE Evolution (LTE-a) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.21(Wi-Fi), IEEE802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes the NR system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Referring to fig. 2, fig. 2 is a block diagram of a wireless communication system to which an embodiment of the present invention is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may also be referred to as a User terminal or a User Equipment (UE), where the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device, and the specific type of the terminal 11 is not limited in the embodiment of the present invention. The network device 12 may be a Base Station and/or a core network element, wherein the Base Station may be a 5G or later-version Base Station (e.g., a gNB, a 5G NR NB, etc.), or a Base Station in other communication systems (e.g., an eNB, a WLAN access point, or other access points, etc.), wherein the Base Station may be referred to as a node B, an evolved node B, an access point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, it should be noted that, in the embodiment of the present invention only takes the Base Station in the NR system as an example, but does not limit the specific type of base station.

The base stations may communicate with the terminals 11 under the control of a base station controller, which may be part of the core network or some of the base stations in various examples. Some base stations may communicate control information or user data with the core network through a backhaul. In some examples, some of the base stations may communicate with each other, directly or indirectly, over backhaul links, which may be wired or wireless communication links. A wireless communication system may support operation on multiple carriers (waveform signals of different frequencies). A multi-carrier transmitter can transmit modulated signals on the multiple carriers simultaneously. For example, each communication link may be a multi-carrier signal modulated according to various radio technologies. Each modulated signal may be transmitted on a different carrier and may carry control information (e.g., reference signals, control channels, etc.), overhead information, data, and so on.

The base station may communicate wirelessly with the terminal 11 via one or more access point antennas. Each base station may provide communication coverage for a respective coverage area. The coverage area of an access point may be divided into sectors that form only a portion of the coverage area. A wireless communication system may include different types of base stations (e.g., macro, micro, or pico base stations). The base stations may also utilize different radio technologies, such as cellular or WLAN radio access technologies. The base stations may be associated with the same or different access networks or operator deployments. The coverage areas of different base stations (including coverage areas of base stations of the same or different types, coverage areas utilizing the same or different radio technologies, or coverage areas belonging to the same or different access networks) may overlap.

The communication links in a wireless communication system may comprise an Uplink for carrying Uplink (UL) transmissions (e.g., from terminal 11 to network device 12) or a Downlink for carrying Downlink (DL) transmissions (e.g., from network device 12 to terminal 11). The UL transmission may also be referred to as reverse link transmission, while the DL transmission may also be referred to as forward link transmission. Downlink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both. Similarly, uplink transmissions may be made using licensed frequency bands, unlicensed frequency bands, or both.

As described in the background art, in the 5G protocol stack in the prior art, there are partial redundant functions in the user plane processing, but the protocol stack facing the future needs flexibility and simple design, and in order to simplify the processing flow of the user plane and improve the network efficiency, the embodiment of the present invention provides a new simplified architecture of the user plane of the access network, and by integrating the functions of the user plane, the repeated processing function of each protocol layer can be reduced, and the processing efficiency can be improved.

Referring to fig. 3, an example of a structure of a user plane Processing entity of an access network according to an embodiment of the present invention includes a Packet Control and Processing (PCP) module, an MAC layer module, and a physical layer module (PHY).

Wherein, when sending the message:

the packet control processing module is used for segmenting a first data packet of a first QoS flow received from an upper layer and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet; and determining a first Data Radio Bearer (DRB) or a first logical channel mapped by the first QoS flow according to a mapping relationship from the QoS flow to the DRB or the logical channel, and loading the second Data packet on the first DRB or the first logical channel. Here, when the user plane processing entity is applied to the base station side, the upper layer may generally be a core network, that is, a first data packet of a first QoS flow is received from the core network; when the user plane processing entity is applied to the terminal side, the upper layer may be an application layer of the terminal, and the like.

Wherein, when receiving the message:

the MAC layer module is also used for receiving the MAC layer transmission block sent by the physical layer module, obtaining a third data packet and sending the third data packet to the packet control processing module

The packet control processing module is further configured to remove a sequence number included in the third data packet, and reorder the received third data packet according to the sequence number; recombining the reordered third data packet to obtain a fourth data packet; and sending the fourth data packet to an upper layer, for example, the terminal side may be an application layer that sends to the terminal according to QoS flow information (such as a flow ID); the base station side may send the QoS flow information (e.g., flow ID) to the core network.

As can be seen from the above architecture, in order to simplify the access network user plane architecture, the embodiment of the present invention introduces a new functional module, i.e. a PCP module, at the wireless side, the main function of the PCP module includes the remaining functions of the access network user plane function excluding the MAC and the physical layer, and mainly includes one or more of the following functions:

A) and performing header compression, integrity protection and encryption and decryption processing on the received upper layer data packet.

B) And adding the QoS Flow ID and routing to the corresponding logical channel according to the mapping relation from the QoS Flow to the logical channel.

C) And the system is responsible for maintaining the sequence number of the data packet, segmenting and sequencing the data packet, sending a status report according to configuration, triggering retransmission based on demand and the like.

Figure 4 shows a schematic diagram of a PCP architecture under a service architecture. In the service architecture, the network services selectable by the PCP are: header compression, encryption and decryption, sorting and retransmission, and QoS mapping. The network can flexibly and dynamically combine these functions for QoS adaptation according to QoS requirements.

Compared with the user plane architecture in the prior art, the redesigned user plane functional architecture of the embodiment of the present invention has the following differences:

1) improved reordering functionality: in the prior art, reordering is distributed between a PDCP layer and an RLC layer, wherein the RLC layer performs sequencing between segments through an RLC SN number, and the PDCP layer performs sequencing of all PDCP packets using the PDCP SN number. The embodiment of the invention adopts a uniform reordering mechanism and a uniform SN number to complete the ordering of the data packets, and can reduce the processing overhead compared with the two-layer protocol processing in the prior art.

2) More flexible channel mapping. In the prior art, the SDAP layer finishes the mapping from QoS flow to DRB, the PDCP and RLC process data according to the DRB level, and finally maps to a logical channel when submitting to the MAC. Due to the introduction of dual-link and PDCP duty function, the handling of the kind of DRB becomes very complicated. The embodiment of the invention simplifies the processing of the DRB, and directly maps the QoS flow to the logic channel through the newly introduced protocol function. By removing a layer of channel mapping, the uplink QoS flow data can be processed more flexibly, and the protocol overhead is also reduced.

3) Encryption and decryption and header compression functions: in the prior art, the function is in the PDCP layer, and the PDCP SDU received by the PDCP layer is not a direct IP packet, and is usually a data packet with an added SDAP header. In order to reduce the influence of head-to-head compression and encryption and decryption of the SDAP, the embodiment of the invention directly performs head compression and encryption and decryption on the IP packet from the core network, and then performs channel mapping.

Based on the user plane processing entity, the embodiment of the present invention further provides a data transmission method, which may be applied to a first device, where the first device may be a terminal or a base station, and the like. As shown in fig. 5, the method includes:

and step 51, segmenting the first data packet of the QoS flow, and distributing a sequence number to each data packet obtained after segmentation to obtain a second data packet.

Here, the first device may segment the first packet of the QoS flow according to a packet processing capability of a MAC layer and/or a physical layer of the first device. For example, when the packet processing capability of the MAC layer and/or the physical layer is strong, the data size of each segment may be increased, and conversely, the data size of the segment may be decreased.

In this embodiment of the present invention, when the first device is a terminal, the first data packet of the QoS flow is a data packet generated by an application layer of the terminal. And when the first device is a base station, the first data packet of the QoS flow is a data packet sent to the base station by a core network.

And step 52, according to the mapping relationship from the QoS flow to the DRB or the logical channel, the second data packet is carried on the corresponding DRB or the logical channel for transmission.

Through the steps, the embodiment of the invention adopts a uniform reordering mechanism and a uniform serial number to complete the ordering of the data packets, and can reduce the processing overhead compared with the two-layer protocol processing in the prior art. In addition, the embodiment of the invention can directly map the QoS flow, reduces a layer of channel mapping compared with the prior art, can more flexibly process the uplink QoS flow data and reduces the protocol overhead.

The embodiment of the invention can also support the retransmission function. For example, when the retransmission function is activated, the first device may further receive a status report indicating a reception condition of the second data packet. For example, the status includes a sequence number that may indicate successful and/or failed receipt of the data packet. Then, the first device may determine, according to the status report, a sequence number of the second data packet that needs to be retransmitted, and retransmit the corresponding second data packet according to the determined sequence number.

In addition, before segmenting the first data packet of the QoS flow in step 51, the first device may further perform at least one of:

1) performing header compression processing on a first data packet of the QoS flow;

2) integrity protection is carried out on the first data packet of the QoS flow by utilizing an integrity protection key;

3) encrypting a first data packet of the QoS flow by using an encryption and decryption key;

4) and adding the QoS flow identification to the first data packet of the QoS flow.

The above items may be optional functions, i.e. the relevant material is executed when the relevant function is configured.

Fig. 6 shows an example of a flow of the transmission processing on the first device side, and fig. 6 includes the above-described plurality of optional functions. Fig. 6 specifically includes:

A) and receiving a data packet sent by the Qos flow, and performing header compression. The function can be used as an optional function or a necessary function. In the case of an optional function, header compression is performed only when the function is configured.

B) And performing integrity protection according to the configured integrity protection key. If optional, the function is only executed when it is configured.

C) And encrypting according to the configured encryption and decryption keys. If optional, the function is only executed when it is configured.

D) The QoS Flow ID is added to the packet.

E) The data packets are segmented according to the capability of the lower layer, and SN numbers are distributed to each data packet according to the sequence of the data packets.

F) And routing the data packet to the corresponding DRB/logic channel according to the configuration relation from the Qos Flow to the DRB/logic channel.

G) And under the condition that retransmission opening is configured, retransmitting the data packet corresponding to the SN number according to the received status report or bottom feedback.

Referring to fig. 7, another data receiving method according to an embodiment of the present invention, when applied to a second device side, includes:

step 71, receiving a third data packet sent by the first device, removing a sequence number included in the third data packet, and reordering the received third data packet according to the sequence number.

Here, in the reordering, the third packet may be reordered according to the sequence number, and the packet corresponding to the repeated sequence number may be discarded.

And 72, recombining the reordered third data packet to obtain a fourth data packet.

Here, the reassembling the reordered third data packet to obtain a fourth data packet may include at least one of:

1) when the fourth data packet carries the QoS flow identification, removing the QoS flow identification carried in the fourth data packet;

2) when the fourth data packet is configured with an encryption and decryption function, decrypting the fourth data packet by using an encryption and decryption key;

3) and when the fourth data packet is configured with an integrity protection function, carrying out integrity check on the fourth data packet of the QoS flow by using an integrity protection key.

And 73, sending the fourth data packet to an upper layer.

For example, when the second device is a terminal, the fourth data packet may be sent to an application layer of the terminal according to QoS flow information (e.g., a flow ID); when the second device is a base station, the fourth packet may be sent to the core network according to QoS flow information (e.g., a flow ID).

Through the steps, the embodiment of the invention simplifies the processing of the receiving device on the received data packet and reduces the processing overhead.

In the above method, the second device may further determine, according to a reordering result of the third data packet, a reception condition of the third data packet, and send a status report indicating the reception condition of the third data packet to the first device. E.g. indicating whether the third data packet was received successfully.

In step 73, the second device may determine, according to a mapping relationship from a QoS flow to a DRB or a logical channel, a target QoS flow corresponding to the DRB or the logical channel carrying the third data packet; or, when the fourth data packet carries the QoS flow identifier, the QoS flow identifier carried in the fourth data packet is acquired. And then, according to the target QoS flow or the QoS flow identification, the fourth data packet is sent to an upper layer.

Specifically, when the second device is a terminal, the upper layer is an application layer of the terminal. And when the second device is a base station, the upper layer is a core network.

Fig. 8 gives an example of the flow of the reception processing on the second device side, and fig. 8 includes the above-described plurality of optional functions. Specifically, fig. 8 includes:

1) and removing the SN number, reordering the data packets received from the bottom layer, and discarding the data packets corresponding to the repeated SN number. And if the retransmission starting is configured, sending a status report according to the sequencing condition and the configuration.

2) For correctly received packets, the reassembly of the data packets is performed according to the received sequence.

3) If a QoS flow ID is configured, the QoS flow ID is removed. And marking the QoS Flow corresponding to the data packet, so as to be convenient for subsequent submission to the correct QoS Flow.

4) And if the high layer is configured with the encryption and decryption functions, decrypting according to the configured key.

5) And if the high layer is configured with the integrity protection function, checking according to the integrity protection key.

6) The header is decompressed and then delivered to the upper layers.

It can be seen from the above description that, in the embodiment of the present invention, based on the idea of simplifying protocol stack processing, a packet control processing module is proposed, which removes a redundant portion in the design of a 5G protocol stack and simplifies processing of an access network user plane. Meanwhile, the module can support a service framework, flexibly and dynamically load network services provided by the PCP, and improve the flexibility and the network processing efficiency.

Various methods of embodiments of the present invention have been described above. An apparatus for carrying out the above method is further provided below.

Referring to fig. 9, an embodiment of the present invention provides a first apparatus 90, including:

a segmentation processing module 91, configured to segment a first data packet of a QoS stream, and assign a sequence number to each data packet obtained after segmentation to obtain a second data packet;

and a mapping sending module 92, configured to send the second data packet carried on the corresponding DRB or logical channel according to a mapping relationship from the QoS flow to the data radio bearer DRB or logical channel.

Optionally, the first device further includes:

a report receiving module, configured to receive a status report indicating a reception status of the second data packet;

and the retransmission module is used for determining the sequence number of the second data packet needing to be retransmitted according to the status report and retransmitting the corresponding second data packet according to the determined sequence number.

Optionally, the segmentation processing module 91 is further configured to segment the first data packet of the QoS flow according to a data packet processing capability of a media access control MAC layer and/or a physical layer of the first device.

Optionally, when the first device is a terminal, the first data packet of the QoS flow is a data packet generated by an application layer of the terminal;

Optionally, the first device further includes:

a first processing module, configured to, prior to segmenting the first data packet of the QoS flow, perform at least one of:

It should be noted that the apparatus in this embodiment is a device corresponding to the method shown in fig. 5, and the implementation manners in the embodiments are all applicable to the embodiment of the apparatus, and the same technical effects can be achieved. The device provided by the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated herein.

Referring to fig. 10, an embodiment of the invention provides a structural schematic diagram of a first apparatus 1000, including: a processor 1001, a transceiver 1002, a memory 1003, and a bus interface, wherein:

in an embodiment of the present invention, the first device 1000 further includes: a program stored on the memory 1003 and executable on the processor 1001, which when executed by the processor 1001 performs the steps of:

It can be understood that, in the embodiment of the present invention, when being executed by the processor 1001, the computer program can implement the processes of the data sending method embodiment shown in fig. 5, and can achieve the same technical effects, and in order to avoid repetition, the description thereof is omitted here.

In fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1002 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1001 is responsible for managing a bus architecture and general processes, and the memory 1003 may store data used by the processor 1001 in performing operations.

It should be noted that the terminal in this embodiment is a device corresponding to the method shown in fig. 5, and the implementation manners in the above embodiments are all applied to the embodiment of the terminal, and the same technical effects can be achieved. In the device, the transceiver 1002 and the memory 1003, and the transceiver 1002 and the processor 1001 may be communicatively connected through a bus interface, the function of the processor 1001 may also be implemented by the transceiver 1002, and the function of the transceiver 1002 may also be implemented by the processor 1001. It should be noted that, the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

In some embodiments of the invention, there is also provided a computer readable storage medium having a program stored thereon, which when executed by a processor, performs the steps of:

When executed by the processor, the program can implement all the implementation manners in the data transmission method applied to the first device, and can achieve the same technical effect, and for avoiding repetition, the details are not repeated here.

Referring to fig. 11, an embodiment of the present invention provides a second device 110, including:

a receiving processing module 111, configured to receive a third data packet sent by a first device, remove a sequence number included in the third data packet, and reorder the received third data packet according to the sequence number;

a reassembly module 112, configured to reassemble the reordered third data packet to obtain a fourth data packet;

a sending module 113, configured to send the fourth data packet to an upper layer.

Optionally, the receiving processing module 111 is further configured to reorder the third data packet according to the sequence of the sequence number, and discard the data packet corresponding to the repeated sequence number.

Optionally, the second device further includes:

and the feedback module is used for determining the receiving condition of the third data packet according to the reordering result of the third data packet and sending a status report for indicating the receiving condition of the third data packet to the first equipment.

Optionally, the sending module is further configured to determine, according to a mapping relationship from a QoS flow to a DRB or a logical channel, a target QoS flow corresponding to the DRB or the logical channel that carries the third data packet; or when the fourth data packet carries the QoS flow identifier, acquiring the QoS flow identifier carried in the fourth data packet; and sending the fourth data packet to an upper layer according to the target QoS flow or the QoS flow identification.

Optionally, when the second device is a terminal, the upper layer is an application layer of the terminal; and when the second device is a base station, the upper layer is a core network.

Optionally, the reassembly module 112 is further configured to, when the reordered third data packet is reassembled to obtain a fourth data packet, perform at least one of the following:

It should be noted that the apparatus in this embodiment is a device corresponding to the method shown in fig. 7, and the implementation manners in the above embodiments are all applicable to the embodiment of the apparatus, and the same technical effects can be achieved. The device provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Referring to fig. 12, an embodiment of the invention provides a structural schematic diagram of a second apparatus 1200, including: a processor 1201, a transceiver 1202, a memory 1203, and a bus interface, wherein:

in this embodiment of the present invention, the second device 1200 further includes: a program stored on the memory 1203 and executable on the processor 1201, which when executed by the processor 1201, performs the steps of:

recombining the reordered third data packet to obtain a fourth data packet;

and sending the fourth data packet to an upper layer.

It can be understood that, in the embodiment of the present invention, when being executed by the processor 1201, the computer program can implement each process of the data receiving method embodiment shown in fig. 7, and can achieve the same technical effect, and details are not described here to avoid repetition.

In fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits linking one or more processors, represented by the processor 1201, and memory, represented by the memory 1203. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1202 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.

The processor 1201 is responsible for managing a bus architecture and general processing, and the memory 1203 may store data used by the processor 1201 in performing operations.

It should be noted that the terminal in this embodiment is a device corresponding to the method shown in fig. 7, and the implementation manners in the above embodiments are all applicable to the embodiment of the terminal, and the same technical effects can be achieved. In the device, the transceiver 1202 and the memory 1203, and the transceiver 1202 and the processor 1201 may be communicatively connected by a bus interface, the functions of the processor 1201 may also be implemented by the transceiver 1202, and the functions of the transceiver 1202 may also be implemented by the processor 1201. It should be noted that, the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

recombining the reordered third data packet to obtain a fourth data packet;

and sending the fourth data packet to an upper layer.

When executed by the processor, the program can implement all the implementation manners in the data receiving method applied to the second device, and can achieve the same technical effect, and for avoiding repetition, the details are not repeated here.

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 application, 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 of the present invention.

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 or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several 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.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A user plane processing entity of an access network, comprising: a packet control processing module, a Media Access Control (MAC) layer module and a physical layer module, wherein,

2. The user plane processing entity of claim 1,

3. A data transmission method is applied to first equipment and is characterized by comprising the following steps:

4. The method of claim 3, further comprising:

receiving a status report indicating a reception of the second packet;

5. The method of claim 3, wherein the segmenting the first packet of the quality of service (QoS) flow comprises:

6. The method of claim 3,

when the first device is a terminal, a first data packet of the QoS flow is a data packet generated by an application layer of the terminal;

7. The method of any of claims 3 to 6, wherein prior to segmenting the first data packet of the QoS flow, further comprising at least one of:

8. A data receiving method applied to a second device, comprising:

recombining the reordered third data packet to obtain a fourth data packet;

and sending the fourth data packet to an upper layer.

9. The method of claim 8, wherein reordering the received third data packets based on the sequence number comprises:

10. The method of claim 8, further comprising:

11. The method of claim 8, wherein said sending the fourth packet to an upper layer comprises:

12. The method of claim 8,

when the second device is a terminal, the upper layer is an application layer of the terminal;

13. The method according to any of claims 8 to 12, wherein reassembling the reordered third data packets to obtain fourth data packets comprises at least one of:

14. A first device comprising a processor and a transceiver, wherein,

15. The first device of claim 14, further comprising:

and the processor is further configured to determine a sequence number of a second data packet that needs to be retransmitted according to the status report, and retransmit a corresponding second data packet according to the determined sequence number.

16. The first device of claim 14, wherein the processor is further configured to:

17. The first apparatus of any of claims 14 to 16,

the processor is further configured to, prior to segmenting the first data packet of the QoS flow, further perform at least one of:

18. A first device, comprising:

and the mapping sending module is used for carrying the second data packet on the corresponding DRB or logical channel for sending according to the mapping relation from the QoS flow to the data radio bearer DRB or logical channel.

19. A second device comprising a transceiver and a processor, wherein,

the transceiver is used for receiving a third data packet sent by the first equipment;

20. The second device of claim 19, wherein the processor is further configured to:

21. The second device of claim 19, wherein the processor is further configured to:

22. The second device of claim 19, wherein the processor is further configured to:

23. The second device according to any of claims 19 to 22, wherein the processor is further configured to, when reassembling the reordered third data packets to obtain a fourth data packet, perform at least one of:

24. A second apparatus, comprising:

the receiving processing module is used for receiving a third data packet sent by the first equipment, removing a sequence number contained in the third data packet, and reordering the received third data packet according to the sequence number;

25. A communication device, comprising: processor, memory and program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method according to any one of claims 1 to 13.

26. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 13.