CN114339882B

CN114339882B - Data transmission method, device and equipment

Info

Publication number: CN114339882B
Application number: CN202011060952.4A
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: 2020-09-30
Filing date: 2020-09-30
Publication date: 2024-04-09
Anticipated expiration: 2040-09-30
Also published as: CN114339882A; WO2022068911A1

Abstract

The embodiment of the invention provides a data transmission method, device and equipment; the data transmission method of the user plane function UP of the L3 comprises the following steps: determining an order of transmitting at least one medium access control MAC link of the data packet; and transmitting the data packets according to the sequence of the at least one MAC link. The scheme of the invention reduces the cost of the sequence number length in the data packet.

Description

Data transmission method, device and equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and device.

Background

The L2 (Layer 2) of 5G includes four protocol sublayers of SDAP/PDCP/RLC/MAC, and is directed to the design goal of the very simple Network (Lite Network) of the next generation mobile communication, it is proposed that Layer 3L3 introduces a User Plane function (UP) for data processing, and the data Plane function of L3 is directly connected to the MAC protocol functional entity of L2, no matter whether or not other protocol entities exist in L2.

In 3G/4G/5G systems, the AS layer on the terminal side has only a Control Plane (CP), i.e. only a RRC (Radio Resource Control) protocol layer (or sub-layer). The RRC protocol layer completes the radio resource control function and has no data processing function of the UP side.

Considering that in the future, an UP function (User Plane) is introduced into L3 (Layer 3: RRC Layer of the AS Layer in Layer 3,5G system is called 3 Layer protocol) of the AS Layer (Access Layer), then L3 UP has a data ordering function, and ensures that data packets are delivered to an upper Layer in sequence. Meanwhile, when one L3 UP is connected with a plurality of L2 functional entities at the same time, the L3 UP needs to sort the data submitted by the plurality of L2 entities; and meanwhile, data packets are required to be distributed among different L2 entities.

Therefore, how to set the sequence number of the data packet and how to reduce the overhead of the sequence number length in the data packet is a urgent problem to be solved.

Disclosure of Invention

The invention provides a data transmission method, a device and equipment. The cost of the sequence number length in the data packet is reduced, and flexible definition of the sequence number of the data packet is realized.

In order to solve the technical problems, the embodiment of the invention provides the following scheme:

a data transmission method applied to layer three L3 of a transmitting device, the method comprising:

determining an order of at least one medium access control MAC link transmitting the data packets,

and transmitting the data packets according to the sequence of the at least one MAC link.

Optionally, sending the data packets in the order of the at least one MAC link includes:

according to the sequence of the at least one MAC link, distributing the sequence number of the data packet carried on the MAC link to each MAC link;

and sending the data packets according to the sequence of the at least one MAC link and the sequence number of the data packet carried on each MAC link.

Optionally, determining an order of transmitting at least one MAC link of the data packet includes:

and determining the sequence of at least one MAC link for transmitting the data packet and the index number of the at least one MAC link according to the measurement information of the MAC links.

Optionally, the measurement information includes at least one of:

the rate of data transmission over the MAC link;

time delay of data transmission of the MAC link;

the ratio of the data packets of the MAC link to be fragmented;

the ratio at which packets of the MAC link are concatenated;

the load of the cell to which the MAC link belongs;

the MAC link scheduler needs the total number of users to be scheduled.

and sequencing the at least one MAC link according to the ID of the MAC link to obtain the sequence of the at least one MAC link.

Optionally, the ID of the MAC link is an index of a child window in the transmission window; the sub-window is a sending window of the MAC link, and the sending window comprises sub-windows corresponding to all the MAC links connected with the UP of the L3.

Optionally, the sequence number of the data packet carried on each MAC link is configured by:

and respectively distributing data packet clusters to each MAC link according to the sequence of the at least one MAC link, wherein the data packet sequence numbers in each data packet cluster are continuous.

Optionally, the data transmission method further includes: and transmitting the sequence of the at least one MAC link to the receiving device.

Optionally, the data transmission method further includes: and if the sequence of the at least one MAC link is changed, sending the changed new sequence of the at least one MAC link to receiving equipment.

Optionally, the sequence of the at least one MAC link is sent to a receiving device, including:

and transmitting the sequence of the at least one MAC link to receiving equipment through a protocol data unit PDU or a media access control unit MAC CE or a downlink control information DCI message.

Optionally, the method is performed by the user plane function UP of L3.

The embodiment of the invention also provides a data transmission method applied to layer three L3 of the receiving equipment, which comprises the following steps:

when receiving a data packet, acquiring the sequence of at least one MAC link for transmitting the data packet;

and receiving the data packets according to the sequence of the at least one MAC link.

Optionally, the step of acquiring the order of at least one MAC link for transmitting the data packet includes:

and receiving the sequence of the at least one MAC link transmitted by the transmitting equipment through a protocol data unit PDU or a media access control unit MAC CE or a downlink control information DCI message.

Optionally, the order of the at least one MAC link is determined according to at least one of:

the rate of data transmission over the MAC link;

time delay of data transmission of the MAC link;

the ratio of the data packets of the MAC link to be fragmented;

the ratio at which packets of the MAC link are concatenated;

the load of the cell to which the MAC link belongs;

total number of users that the MAC link scheduler needs to schedule

Optionally, each MAC link is respectively allocated with a packet cluster, and a packet sequence number of each packet cluster is continuous.

The embodiment of the invention also provides a data transmission device, which is applied to the sending equipment, and comprises:

A layer three L3 user plane function UP for determining an order of at least one MAC link for transmitting the data packet; and transmitting the data packets according to the sequence of the at least one MAC link.

The embodiment of the invention also provides a transmitting device, which comprises: layer three L3, layer two L2 and layer one L1;

the transceiver of the L3 is configured to determine an order of at least one MAC link for transmitting the data packets; and transmitting the data packets according to the sequence of the at least one MAC link.

The embodiment of the invention also provides a data transmission device, which is applied to receiving equipment, and comprises:

a user plane function UP of layer three L3, configured to obtain, when receiving a data packet, a sequence of at least one MAC link for transmitting the data packet; and receiving the data packets according to the sequence of the at least one MAC link.

Optionally, the method is performed by the user plane function UP of L3.

The embodiment of the invention also provides a receiving device, which comprises: layer three L3, layer two L2 and layer one L1; the transceiver of the L3 is configured to, when receiving a data packet, acquire an order of at least one MAC link for transmitting the data packet; and receiving the data packets according to the sequence of the at least one MAC link.

The embodiment of the invention also provides a communication device, which comprises: 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 comprising instructions which, when executed on a computer, cause the computer to perform a method as described above.

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

in the above scheme of the present invention, when the user plane function UP of the layer three L3 sends a data packet, determining the sequence of at least one medium access control MAC link for sending the data packet and the index number of the at least one MAC link; according to the sequence of the at least one MAC link, distributing the sequence number of the data packet carried on the MAC link to each MAC link; and sending the data packets according to the sequence of the at least one MAC link and the sequence number of the data packet carried on each MAC link. Therefore, the cost of the sequence number length in the data packet is reduced, and flexible definition of the sequence number is realized.

Drawings

FIG. 1 is a schematic diagram of a connection between an L3 UP and a plurality of L2 functional entities;

Fig. 2 is a schematic diagram of a transmission method of data of UP of L3;

FIG. 3 is a schematic diagram of a MAC link connected with an UP of L3;

FIG. 4 is a diagram of L3 UP maintaining a virtual transmit window VTxW for MAC link selection;

FIG. 5 is a schematic diagram of the relationship between a predecessor MAC link and a successor MAC;

fig. 6 is a flow chart of a method for transmitting data on the receiving device side.

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 invention 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 examples of the present invention, L1 is layer 1, L2 is layer 2, and L3 is layer 3;

UP: user Plane: a user plane; the function of processing data is generally called;

CP: control Plane: a control surface; a functional totality of processing signaling and control;

RRC at layer 3 is the control function; the newly introduced UP of layer 3 is the data processing function of layer 3. L1 is the physical layer.

MAC link: refers to the uplink (receive) and downlink (transmit) connection links of the L3 UP with the MAC functional entity.

Fig. 1 shows a schematic diagram of connection between an L3 UP and a plurality of L2 functional entities, where the L3 UP is directly connected to a MAC sub-protocol functional entity of L2 through IP flow. The bearer between the L3 UP and the MAC sub-protocol entity is an IP Flow, i.e. a logical channel carrying this IP. Transmitted on each IP Flow are IP packets.

To achieve the ordering and in-order distribution of the packets by the L3 UP, each packet needs to be assigned a Sequence Number (SN).

This non-whole byte adds complexity to the packet processing by way of SN numbers defined by one of the sub-protocol functions of PDCP (Packet Data Convergence Protocol, L2) which are two bytes long (both 12 or 18 bits option) and need to be ordered in combination with the hyper frame number (HFN: hyper Frame Number).

SN is 12 or 18 bits, and whole bytes (8 bits, 16 bits, 24 bits, 32 bits, etc.) are not taken because a long ordering window is required due to the time delay between the receiving end PDCP and the transmitting end PDCP, the SN number of PDCP is directly related to the ordering window length, which is 1/2 of the SN maximum value. Too short an SN number of a nibble results in too small a sorting window or too long an SN number of a nibble results in too large a sorting window and waste.

As shown in fig. 2, an embodiment of the present invention provides a data transmission method applied to layer three L3 of a transmitting device, the method including:

step 21, determining an order of at least one medium access control MAC link transmitting the data packets,

and step 22, transmitting the data packets according to the sequence of the at least one MAC link.

In a specific implementation manner of this embodiment, the step 21 may include:

step 211, when the user plane function UP of the layer three L3 sends a data packet, determining an order of at least one medium access control MAC link for sending the data packet and an index number of the at least one MAC link;

the step 22 may include:

step 221, according to the sequence of the at least one MAC link, assigning a sequence number of a data packet carried on the MAC link to each MAC link;

and 231, transmitting the data packets according to the sequence of the at least one MAC link and the sequence number of the data packet carried on each MAC link.

In this embodiment, as shown in fig. 3, the MAC link connected to the user plane function UP of L3 may be identified by 0# to n#, and the connection from 0# to n# is the MAC link.

In an optional embodiment of the present invention, in step 21, determining the order of sending the at least one MAC link of the data packet and the index number of the at least one MAC link includes:

Optionally, the measurement information herein may include at least one of:

the rate of data transmission over the MAC link; time delay of data transmission of the MAC link; the ratio of the data packets of the MAC link to be fragmented; the ratio at which packets of the MAC link are concatenated; the load of the cell to which the MAC link belongs; the MAC link scheduler needs the total number of users to be scheduled.

In specific implementation, the L3 UP may perform MAC link selection according to one or several of the following methods:

(a) Selecting an MAC link according to the data transmission rate of each MAC link, wherein the MAC link with the rate higher than a preset value is preferentially selected for use; a high MAC link rate means that the data BLER (block error rate) on the MAC link is low and the probability of success of the data after retransmission is high;

(b) According to the time delay of data transmission on each MAC link, the MAC link with low time delay is preferentially selected for use; the low time delay of the data transmission of the MAC link means that the data retransmission on the MAC link is less, and the air interface resource is relatively sufficient to support the data and can be rapidly transmitted to the air interface;

(c) According to the ratio of the data packet segmented (dividing a finished service data unit SDU into a plurality of small segments) on each MAC link, the MAC links with low ratio are preferentially selected for use;

(d) According to the ratio of data packet cascade connection (transmitting a plurality of small SDUs into a large protocol data unit PDU) on each link, the MAC link with high ratio is preferentially selected for use;

(e) The load of the cell to which the MAC link belongs or the total number of users to be scheduled by the MAC scheduler, and the MAC link with relatively light load or relatively less number of users is preferentially selected for use;

the L3 UP selects a link to transmit data each time according to one or more of the above. Each MAC link reports measurement information to the L3 UP so that the L3 UP obtains information to monitor the MAC link.

In an alternative embodiment of the present invention, in the step 21, determining the order of sending at least one MAC link of the data packet includes:

The ID of the MAC link is the index of the sub-window in the sending window; the sub-window is a sending window of the MAC link, and the sending window comprises sub-windows corresponding to all the MAC links connected with the UP of the L3.

In an alternative embodiment of the present invention, the sequence number of the data packet carried on each MAC link is configured by:

and respectively allocating data packet clusters (Cluster) to each MAC link according to the sequence of the at least one MAC link, wherein the data packet sequence numbers of each data packet Cluster are continuous.

As shown in fig. 4, L3 UP may maintain a virtual transmit window (VTxW: virtual Tx Window) for MAC link selection. VTxW features:

1. the VTxW is formed by transmitting windows (Tx Window) of all MAC links connected with the L3 UP, and the transmitting Window of each MAC link is a child Window of the VTxW;

2. for each sending Window of the MAC link, the VTxW adopts a two-stage management mode of an MAC link ID and a Tx Window, wherein the MAC link ID is an index or a subscript of the link Tx Window in the VTxW.

One method is as follows: the MAC link IDs are managed in order of their values from small to large. For example, vtxwindow= { (0, 15), (0,31), (0, 7) }. The VTx Window has three MAC links, the length of a sending Window of a 0# link is 16, and the value range of an SN number is 0-15; the length of a sending window of the 1# link is 32, and the value range of the SN number is 0-31; the length of the sending window of the No. 2 link is 8, and the value range of the SN number is 0-7. The index of the three sub-windows in VTx Window is 0,1,2 respectively.

In an alternative embodiment of the present invention, the data transmission method may further include:

and step 24, transmitting the sequence of the at least one MAC link to the receiving equipment.

Optionally, the sequence of the at least one MAC link is sent to the receiving device through a protocol data unit PDU or a medium access control unit MAC CE or a downlink control information DCI message.

In this embodiment, when the L3 UP of the transmitting end device transmits data, the MAC link for transmitting the data is selected, and the order of the MAC links is maintained;

the L3 UP of the transmitting terminal equipment informs the sequence of the MAC links selected by the L3 UP of the receiving terminal equipment, can inform the information of a plurality of MAC links at one time, and can circularly use the MAC links according to the informing sequence for data transmission; the L3 UP of the transmitting terminal equipment timely transmits the MAC link selection notice to the receiving terminal L3 UP according to the data transmission requirement. In order to ensure the robustness of the reception of the MAC link selection information, the transmitting end device may start to transmit data after obtaining confirmation of correct reception of the MAC link selection information.

After receiving the notification information, the L3 UP of the receiving end device ensures the sequence of the data packets among different MAC links according to the sequence of the MAC links indicated in the notification information, and the sequence of the data packets in each MAC link is completed by the MAC of the receiving end device and is sequentially sent to the L3 UP of the receiving end device.

When there is only one MAC link between the L3 UP of the transmitting-side device and the L3 UP of the receiving-side device, the MAC link selection function may not be started.

Such as: there are 4 MAC links, #0, #1, #2, #3, respectively;

the L3 UP of the transmitting terminal equipment forms a sequence according to the quality of each MAC link: #3, #1, #0, #2; according to the requirement of service QoS, three MAC links #3, #1 and #0 are used; because the #2MAC link cannot meet the requirement, the L3 UP of the transmitting end can be used to transmit data transmission with low QoS requirement.

Before transmitting data or when transmitting the first data packet, a MAC link selection notification message is transmitted. The message may be sent in the form of an L3 UP control PDU, may be placed in the form of a MAC CE, or may be carried in DCI of the PDCCH.

If the control PDU is L3 UP, the control PDU is required to be sent in advance, for example, the control PDU is sent on a #3MAC link, and data transmission is started after ACK confirmation of the opposite terminal is obtained.

If the packet is the MAC CE or the PDCCH, the packet can be sent along with the first data packet.

Before no update is received, the transmitting end device and the receiving end device transmit and receive data according to the sequence #3, #1 and # 0.

In an optional embodiment of the present invention, the data transmission method may further include:

Step 25, if the order of the at least one MAC link is changed, after the data packet is sent, sending the changed order of the new at least one MAC link to the receiving device.

In this embodiment, when a change occurs in the MAC link connected to the L3 UP, various link operations including establishment from scratch, addition or subtraction, deletion, and the like are included, and the L3 CP configures the L3 UP through signaling or notifies the L3 UP through an internal message. The configured information at least comprises link identification information of the MAC links connected with the L3 UP, the length of a sending window of each MAC link, the mapping relation between the L3 UP and the MAC links, the QoS requirement of each MAC link and the like.

When the MAC link needs to be changed, the L3 UP of the transmitting terminal equipment needs to be changed after the original sequential link is transmitted, so that the disorder of data is reduced as much as possible. For example, #3, #1, #0 is the order in which the MAC links are used in sequence, and #3, #0 is required because the MAC links have a high error rate and cannot transmit data; the implementation sequence of the L3 UP is as follows: #3, #1, #0 (existing MAC link order), #3, #0 (new link order); and when the new link and the old link are sequentially switched, the MAC link selection notification information is sent when the data packet is sent according to the new sequence on each newly selected link. When a new sequence of data packets is sent on the #3MAC link, a MAC link selection notification message is sent first; when a new sequence of packets is sent on the #0MAC link, a notification message of the MAC link selection is also sent first.

As shown in fig. 5, a schematic diagram showing the relationship between the precursor MAC link and the subsequent MAC is given. Arrow 2 indicates the occurrence of a new sequence selection; arrow 1 indicates a defined ordering sequence of the reciprocation cycle.

MAC link selection notification message: there may be various ways, one way is to include the sequence of all MAC links of the round each time, for example, select #3, #1, #0MAC links, and the sent MAC link selection notification message includes three link sequences of #3, #1, #0 in sequence at the same time; another way is to include a precursor MAC link and a subsequent MAC link of the present MAC link, as shown in fig. 5; taking #3, #1, #0 as an example, when the transmission is performed for the first time, the precursor MAC link of the #3MAC link is an invalid value, and the #3MAC link is identified as the first link; the predecessor link of the #1MAC link is a #3MAC link, and the successor link is a #0MAC link; the predecessor MAC link of the #0MAC link is the #1MAC link, and the successor link is the 3# MAC link; at the beginning again, the precursor link of the #3MAC link is #0, and the cycle is repeated. If the adjustment to #3 and #0 occurs, the precursor MAC link of the #3MAC link is a #0 link, and the subsequent link is still a #0 link; the #0 link is preceded by a #3 and followed by a #3 link. When the #0 link is not received on the #0 link and the #3 link is followed by the #3 link and the MAC link selection information is received on the #0 link, the data packets received on the #0 link are #0 links in the cycle of "#3, #1, # 0".

For the L3 UP of the receiving end, the method for judging the MAC link sequence is as follows:

1. receiving the MAC link notification information sent by a sending end, wherein the notification information is an indication of MAC link adjustment;

2. the sender L3 UP will send the notification information on each MAC link that needs to be adjusted.

3. Before the MAC link adjustment information is not received, the packets received on the MAC link are still ordered according to the existing MAC link order.

According to the embodiment of the invention, a short SN mode in an air interface data packet is realized by defining an L3 UP and MAC two-stage SN mechanism and binding an SN number with a link;

the control PDU is selected by the end-to-end L3 UP's transmit SN number (MAC link) to achieve the jumping allocation of SN number fragments without compromising the continuity of the SN.

The ordering sequence of each data packet consists of two parts:

1. a sequence index of the MAC link transmitting the data packet; and

2. the sending order of each data packet in the MAC link for transmitting the data packet, i.e. SN (Sequence Number) carried by each data packet.

In specific implementation, the L3 UP is responsible for selecting the MAC link to obtain the sequence index of the MAC link. The VTxW does not generate an SN number for each packet (L3 UP PDU).

The links with high air interface throughput can be preferentially selected according to the sequence of the MAC link numbers, the rate of sending the data packets of each MAC link, the MAC links with matched air interface sending rate can be selected according to the QoS requirement of the data, and the selection can be performed under various conditions. For example, if selected sequentially, 0,1,2 cycles back and forth; if the selection is made by combining multiple conditions, the sending rate of each link, the BLER of data packet sending, the QoS guarantee requirement of service, the load of the cell to which the MAC link belongs or the total number of users to be scheduled by the MAC scheduler can be considered. When a sub-window is selected, if there is data in the sub-window that is being transmitted by the MAC layer, the L3 UP needs to inform the MAC layer that the transmission window needs to be reset to an initial value, i.e., SN starts counting from 0 when the current packet is transmitted after the existing data is transmitted.

According to the embodiment of the invention, the link for transmitting the data is selected according to the air interface (MAC link state), so that the data transmission efficiency is improved; the single MAC link and the multi-MAC link are flexibly selected and uniformly distributed; short SN numbers may be used, shortening the overhead of SN numbers (replacing part of the SN length by MAC link ID).

As shown in fig. 6, an embodiment of the present invention further provides a data transmission method applied to layer three L3 of a receiving device, where the method includes:

step 61, when receiving a data packet, acquiring the sequence of at least one MAC link for transmitting the data packet; in one implementation manner, when the user plane function UP of the layer three L3 receives a data packet, the sequence of at least one MAC link for transmitting the data packet is acquired;

and step 62, receiving the data packets according to the sequence of the at least one MAC link.

The rate of data transmission over the MAC link; time delay of data transmission of the MAC link; the ratio of the data packets of the MAC link to be fragmented; the ratio at which packets of the MAC link are concatenated; the load of the cell to which the MAC link belongs; total number of users that the MAC link scheduler needs to schedule

Optionally, each MAC link is respectively allocated a packet segment, a packet sequence number of each packet segment is continuous, and a sequence number of a packet in each packet segment is continuous.

It should be noted that, this embodiment is a method of a receiving end device corresponding to the method of the foregoing sending end device, and all implementation manners in the foregoing method embodiment are applicable to the embodiment of the receiving end device, which can achieve the same technical effects.

An embodiment of the present invention further provides a data transmission apparatus, which is applied to a transmitting device, and the apparatus includes:

And determining the sequence of at least one MAC link for transmitting the data packet according to the measurement information of the MAC links.

Optionally, the measurement information includes at least one of:

Wherein, the ID of the MAC link is the index of the sub-window in the sending window; the sub-window is a sending window of the MAC link, and the sending window comprises sub-windows corresponding to all the MAC links connected with the UP of the L3.

Optionally, the user plane function UP of layer three L3 is further configured to send the sequence of the at least one MAC link to the receiving device.

Optionally, the user plane function UP of layer three L3 is further configured to send the changed sequence of the new at least one MAC link to the receiving device if the sequence of the at least one MAC link is changed.

It should be noted that, the apparatus is an apparatus corresponding to the method on the transmitting end device side, and all implementation manners in the method embodiment are applicable to the embodiment of the apparatus, so that the same technical effects can be achieved.

The embodiment of the invention also provides a transmitting device, which comprises: layer three L3, layer two L2 and layer one L1; the transceiver of the L3 is configured to determine an order of at least one MAC link for transmitting the data packets; and transmitting the data packets according to the sequence of the at least one MAC link.

Optionally, the measurement information includes at least one of:

Optionally, the user plane function UP of layer three L3 is further configured to, if the sequence of the at least one MAC link is changed, send the changed sequence of the new at least one MAC link to the receiving device after the data packet is sent.

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

The embodiment of the invention also provides a receiving device, which comprises: layer three L3, layer two L2 and layer one L1;

the transceiver of the L3 is configured to, when receiving a data packet, acquire an order of at least one MAC link for transmitting the data packet; and receiving the data packets according to the sequence of the at least one MAC link.

The embodiment of the invention also provides a communication device, which comprises: 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 method embodiment are applicable to the embodiment of the equipment, and the same technical effect can be achieved.

Embodiments of the present invention also provide a computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform a method as described above. All the implementation manners in the method embodiment are applicable to the embodiment of the equipment, 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 solution. 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 will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

Furthermore, it should be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order of description, but are not necessarily performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those of ordinary skill in the art that all or any of the steps or components of the methods and apparatus of the present invention may be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, as would be apparent to one of ordinary skill in the art after reading this description of the invention.

The object of the invention can thus also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention can thus also be achieved by merely providing a program product containing program code for implementing said method or 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 apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present invention, it is apparent that the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present invention. The steps of executing the series of processes may naturally be executed in chronological order in the order described, but are not necessarily executed in chronological order. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method of transmitting data, characterized by layer three L3 applied to a transmitting device, the method comprising:

determining an order of at least one medium access control MAC link transmitting the data packets;

transmitting the data packets according to the sequence of the at least one MAC link;

the ordered sequence of data packets includes: and transmitting the sequence index of the MAC link of the data packet and the sending sequence of the data packet inside the MAC link for transmitting the data packet.

2. The method of transmitting data according to claim 1, wherein transmitting the data packets in the order of the at least one MAC link comprises:

3. The method of claim 1, wherein determining an order of at least one MAC link transmitting the data packets comprises:

4. A method of transmitting data according to claim 3, wherein the measurement information comprises at least one of:

the rate of data transmission over the MAC link;

time delay of data transmission of the MAC link;

the ratio of the data packets of the MAC link to be fragmented;

the ratio at which packets of the MAC link are concatenated;

the load of the cell to which the MAC link belongs;

the MAC link scheduler needs the total number of users to be scheduled.

5. The method of claim 1, wherein determining an order of at least one MAC link transmitting the data packets comprises:

6. The method according to claim 5, wherein the ID of the MAC link is an index of a sub-window in the transmission window; the sub-window is a sending window of the MAC link, and the sending window comprises sub-windows corresponding to all the MAC links connected with the UP of the L3.

7. The method of claim 1, wherein the sequence number of the data packet carried on each MAC link is configured by:

8. The method for transmitting data according to claim 1, further comprising:

and transmitting the sequence of the at least one MAC link to the receiving device.

9. The method for transmitting data according to claim 7, further comprising:

and if the sequence of the at least one MAC link is changed, sending the changed new sequence of the at least one MAC link to receiving equipment.

10. The method of transmitting data according to claim 8 or 9, characterized in that the sequence of the at least one MAC link is transmitted to a receiving device, comprising:

11. A method of transmitting data according to claim 1, characterized in that the method is performed by the user plane function UP of L3.

12. A method of transmitting data, characterized by a layer three L3 applied to a receiving device, the method comprising:

receiving the data packets in the order of the at least one MAC link;

13. The method of claim 12, wherein the step of obtaining the order of at least one MAC link from which the data packets are transmitted comprises:

14. The method of claim 12, wherein the order of the at least one MAC link is determined according to at least one of:

the rate of data transmission over the MAC link;

time delay of data transmission of the MAC link;

the ratio of the data packets of the MAC link to be fragmented;

the ratio at which packets of the MAC link are concatenated;

The load of the cell to which the MAC link belongs;

the MAC link scheduler needs the total number of users to be scheduled.

15. The method of claim 12, wherein each MAC link is respectively allocated with a packet cluster, and a packet sequence number of each packet cluster is consecutive.

16. The method of transmission of data according to claim 12, characterized in that the method is performed by the user plane function UP of L3.

17. An apparatus for data transmission, applied to a transmitting device, the apparatus comprising:

a layer three L3 user plane function UP for determining an order of at least one MAC link for transmitting the data packets; transmitting the data packets according to the sequence of the at least one MAC link;

18. A transmitting apparatus, characterized by comprising: layer three L3, layer two L2 and layer one L1;

the transceiver of the L3 is used for determining the sequence of at least one MAC link for transmitting the data packets; transmitting the data packets according to the sequence of the at least one MAC link;

19. A data transmission apparatus for use with a receiving device, the apparatus comprising:

a user plane function UP of layer three L3, configured to obtain, when receiving a data packet, a sequence of at least one MAC link for transmitting the data packet; receiving the data packets in the order of the at least one MAC link;

20. A receiving apparatus, comprising: layer three L3, layer two L2 and layer one L1;

the transceiver of the L3 is configured to, when receiving a data packet, acquire an order of at least one MAC link for transmitting the data packet; receiving the data packets in the order of the at least one MAC link;

21. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any one of claims 1 to 11 or any one of claims 12 to 16.

22. A computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 11 or any one of claims 12 to 16.