CN113132071B

CN113132071B - Data transmission method, device, related equipment and storage medium

Info

Publication number: CN113132071B
Application number: CN201911410993.9A
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: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-10-21
Anticipated expiration: 2039-12-31
Also published as: CN113132071A; WO2021136444A1

Abstract

The invention discloses a data transmission method, a data transmission device, sending end equipment, receiving end equipment and a storage medium. The method comprises the following steps: at a Media Access Control (MAC) layer, the sending end device uses one or more hybrid automatic repeat request (HARQ) processes of a HARQ entity to copy and send a data packet; wherein, one data packet is sent on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet.

Description

Data transmission method, device, related equipment and storage medium

Technical Field

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

Background

In order to improve the transmission rate, a technical scheme for simultaneously transmitting data on a plurality of links is proposed. Specifically, carrier Aggregation (CA) and Dual Connectivity (DC) Multiple Connectivity (MC) from the multi-Carrier High Speed Downlink Packet Access (HSDPA) of the third generation mobile communication technology (3G) era to the fourth generation mobile communication technology (4G) and the fifth generation mobile communication technology (5G) provide for simultaneous data transmission on Multiple links to one User Equipment (UE). With the introduction of low-delay communication (URLLC) service in 5G, the method of "multiple copy (duplication)" is widely used in 5G, that is, the same data packet is transmitted on different links by CA, DC/MC, etc. techniques, so as to obtain robustness gain of multilink parallel transmission.

However, in the related art, multiplexing transmission at a Medium Access Control (MAC) layer cannot be realized.

Disclosure of Invention

In order to solve the related technical problems, embodiments of the present invention provide a data transmission method, an apparatus, related devices, and a storage medium.

The technical scheme of the embodiment of the invention is realized as follows:

the embodiment of the invention provides a data transmission method, which is applied to sending end equipment and comprises the following steps:

at the MAC layer of the sending terminal equipment, copying and sending a data packet by using one or more hybrid automatic repeat request (HARQ) processes of a HARQ entity; wherein,

the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet.

In the foregoing solution, the method further includes:

and after receiving the source data packet, selecting one or more HARQ processes for data transmission.

In the above scheme, one or more HARQ processes are used to transmit a data packet on one carrier;

or,

the data packet is transmitted on multiple carriers using one or more HARQ processes.

In the above scheme, one or more HARQ processes are used to send a data packet on one CC under CA;

or,

the data packet is transmitted on a plurality of CCs under CA using one or more HARQ processes.

In the foregoing solution, the sending end device is a network device, and when multiple HARQ processes send data packets, the method further includes:

transmitting data transmission information of a data packet on a HARQ process Transmission Block (TB) to receiving end equipment; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB.

In the above scheme, the data transmission information is transmitted to the receiving end device in one of the following manners:

transmitting the data transmission information to the receiving end device through Downlink Control Information (DCI);

transmitting the data transmission information to the receiving end device through Radio Resource Control (RRC) signaling;

transmitting the data transmission information to the receiving end device through a media access control element (MAC CE).

In the above scheme, the sending end device is a terminal, and when multiple HARQ processes send data packets, the method further includes:

receiving data transmission information of a data packet sent by network equipment on an HARQ process TB;

and determining a data transmission mode of the data packet on the HARQ process TB by using the data transmission information.

In the above scheme, the data transmission information sent by the network device is received in one of the following manners:

receiving the data transmission information transmitted by the network equipment through the DCI;

receiving the data transmission information transmitted by the network equipment through RRC signaling;

and receiving the data transmission information transmitted by the network equipment through the MAC CE.

An embodiment of the present invention further provides a data transmission method, applied to a receiving end device, including:

receiving a data packet by using one or more HARQ processes of a HARQ entity at an MAC layer of the receiving terminal equipment; wherein,

the data packet received by the HARQ process is a source data packet or is obtained by copying the source data packet.

In the above scheme, one or more HARQ processes are used to receive a data packet on one carrier;

or,

data packets are received at multiple carriers using one or more HARQ processes.

or,

data packets are sent on multiple CCs under CA using one or more HARQ processes.

In the above scheme, the receiving end device is a terminal, and the method further includes:

determining a receiving mode of a data packet based on the data transmission related information, and storing the data packet received by a plurality of HARQ threads into a first cache;

and merging the data in the first cache.

In the above scheme, the data transmission related information sent by the network device is received in one of the following manners:

An embodiment of the present invention further provides a data transmission apparatus, which is arranged on a sending end device, and includes:

a sending unit, configured to use one or more HARQ processes of one HARQ entity to copy and send a data packet at an MAC layer of the sending end device; wherein,

The embodiment of the present invention further provides a data transmission apparatus, which is arranged on a receiving end device, and includes:

a receiving unit, configured to receive, at an MAC layer of the receiving end device, a data packet by using one or more HARQ processes of one HARQ entity; wherein,

the data packet received by the HARQ process is a source packet or is obtained by copying the source packet.

An embodiment of the present invention further provides a sending end device, including: a first processor and a first communication interface; wherein,

the first communication interface is configured to use one or more HARQ processes of one HARQ entity to copy and send a data packet at an MAC layer of the sending-end device; wherein,

a data packet is transmitted on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet.

An embodiment of the present invention further provides a receiving end device, including: a second processor and a second communication interface; wherein,

the second communication interface is configured to receive, at the MAC layer of the receiving end device, a data packet using one or more HARQ processes of one HARQ entity; wherein,

An embodiment of the present invention further provides a sending end device, including: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is configured to execute the steps of any one of the methods at the transmitting end device side when the computer program is executed.

An embodiment of the present invention further provides a receiving end device, including: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is configured to execute the steps of any one of the methods of the receiving end device side when the computer program is executed.

An embodiment of the present invention further provides a storage medium, where a computer program is stored, and the computer program is executed by a processor to implement the steps of any method at the transmitting end device side or implement the steps of any method at the receiving end device side.

In the data transmission method, apparatus, related device and storage medium provided in the embodiments of the present invention, at an MAC layer of a sending end device, the sending end device uses one or more HARQ processes of one HARQ entity to copy and send a data packet; wherein, the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet; in the MAC layer of the receiving end device, the receiving end device receives a data packet using one or more HARQ processes of one HARQ entity, and implements multiplexing transmission of one data packet in the MAC layer through the one or more HARQ processes of one HARQ entity, thereby implementing multiplexing transmission in the MAC layer.

Drawings

Fig. 1 is a schematic diagram of a downlink layer 2 (L2) architecture after CA configuration;

fig. 2 is a schematic diagram of an uplink L2 architecture after CA configuration;

fig. 3 is a schematic flow chart of a data transmission method at a sending end device side according to an embodiment of the present invention;

FIG. 4 is a flow chart of a data transmission method according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of PRBs allocated for scheduling according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a downlink L2 architecture according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an uplink L2 architecture according to an embodiment of the present invention;

fig. 8 is a functional diagram of a downlink MAC scheduler according to an embodiment of the present invention;

FIG. 9 is a functional diagram of an uplink MAC scheduler according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a data transmission device according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a sending end device according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a receiving end device according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a data transmission system according to an embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

In the related art, the same data packet is transmitted on different links through technologies such as CA, DC/MC, etc., the basic idea of these schemes is to perform multiple transmission on the basis of defining different carriers, and the used Hybrid Automatic Repeat reQuest (HARQ) entities are independent. Fig. 1 shows a downlink L2 architecture after CA configuration, and fig. 2 shows an uplink L2 architecture after CA configuration, and as can be seen from fig. 1 and fig. 2, in a CA scenario, whether uplink or downlink, each Component Carrier (CC) (Component Carrier of CA) corresponds to one HARQ entity. In DC/MC, each Leg (Leg) (each link is called a Leg) is divided into different base stations by a separate RB (RB split) scheme, so HARQ entities used on each Leg are also independent.

Because the independent HARQ entity is used for data transmission, only one HARQ process is used to send one or two data packets (dual-codeword) each time data is transmitted to a user, but the two codewords correspond to two different data packets, and thus, this approach cannot realize multiplexing transmission (also can be understood as duplicate transmission) at the MAC layer.

Based on this, in various embodiments of the present invention, the multiplexed transmission of one packet is achieved at the MAC layer by one or more HARQ processes of one HARQ entity.

Here, the multiplexed transmission may also be understood as a duplicated transmission.

When multiplex transmission is performed at the MAC layer, transmission-related processing is performed on each packet alone only at the lower layer (including the physical layer (PHY) layer), and transmission-related processing is not performed on each packet at the upper layer (radio link control (RLC), PDCP).

An embodiment of the present invention provides a data transmission method, which is applied to a sending end device, and as shown in fig. 3, the method includes:

step 301: after a source data packet is received, one or more HARQ processes of one HARQ entity are selected for copying and sending the data packet;

step 302: and at the MAC layer of the sending terminal equipment, copying and sending the data packet by using one or more HARQ processes of one HARQ entity.

Because the duplicate transmission is performed, it can be understood that one data packet (i.e. one data packet that needs to be duplicated for transmission) is transmitted on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or a data packet obtained by copying the source data packet.

Here, in actual application, the sending end device may be a network device, and specifically may be a base station, such as a next generation node B (gNB); correspondingly, the receiving end equipment for receiving the data packet is a terminal; in this case, downlink data is transmitted. Of course, the sending end device may also be a terminal; accordingly, the receiving end device that receives the data packet is a network device, and in this case, the uplink data is transmitted.

In actual application, in step 301, the sending end device may select one or more HARQ processes from available HARQ processes for duplicate transmission, as needed.

The duplicate transmission means: copying a source data packet to obtain one or more copied data packets; the source packets and/or the replicated packets are sent to the recipient. The source packet and the copied packet are identical.

A packet of the MAC layer needs to be sent to a Physical (PHY) layer, and thus, the packet may be referred to as a Transport Block (TB), which is referred to as the PHY layer. Specifically, for the MAC entity, the MAC entity performs transmission related processing on a received Service Data Unit (SDU) of the MAC layer to obtain a Protocol Data Unit (PDU) of the MAC layer, and for the PHY layer, the PHY entity receives the PDU transmitted by the MAC entity, which is referred to as a TB, and before the PHY layer performs encoding, the TB may be referred to as a code word (codeword).

In an embodiment, the sending end device may send a data packet on one carrier by using one or more HARQ processes; of course, one or more HARQ processes may be used to transmit data packets on multiple carriers.

In an embodiment, the sender may send a data packet on one CC under CA using one or more HARQ processes; one or more HARQ processes may also be used to send data packets on multiple CCs under CA.

In practical application, when a plurality of HARQ processes transmit a data packet, the receiving end device needs to acquire transmission information of the data packet, so as to accurately receive the data packet.

Based on this, in an embodiment, the sending end device is a network device, and when multiple HARQ processes send data packets, the method further includes:

sending data transmission information of a data packet on a HARQ process TB to receiving end equipment; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB.

Wherein, the data transmission information can be transmitted to the receiving end device by one of the following modes:

transmitting the data transmission information to the receiving end equipment through DCI;

sending the data sending information to the receiving terminal equipment through RRC signaling;

and transmitting the data transmission information to the receiving end equipment through the MAC CE.

Here, in actual application, when the data transmission information is transmitted by the MAC CE, it needs to be transmitted before transmitting a packet.

Accordingly, when the sending end device is a terminal, the network device needs to configure the data transmission information for the terminal.

Based on this, in an embodiment, when multiple HARQ processes transmit a data packet, the method may further include:

In practical application, the data transmission information sent by the network equipment is received by one of the following modes:

Here, when the network device transmits the data transmission information through DCI, the terminal receives the data transmission information through DCI; when the network equipment sends the data sending information through RRC signaling, the terminal receives the data sending information through the RRC signaling; and when the network equipment transmits the data transmission information through the MAC CE, the terminal receives the data transmission information through the MAC CE.

In practical applications, the RRC signaling may be an RRC connection reconfiguration message or the like.

Correspondingly, an embodiment of the present invention further provides a data method, which is applied to a receiving end device, and includes:

Here, when a sending end device uses one HARQ process of one HARQ entity to send a data packet, the receiving end device uses one HARQ process of one HARQ entity to receive the data packet; when a sending end device uses a plurality of HARQ processes of one HARQ entity to send a data packet, the receiving end device uses a plurality of HARQ processes of one HARQ entity to receive the data packet. That is, the number of HARQ processes used by the transmitting end device is the same as the number of HARQ processes used by the receiving end device.

In an embodiment, the receiving end device receives a data packet on one carrier by using one or more HARQ processes;

or,

When the sending end device uses one or more HARQ processes to send a data packet on one carrier, the receiving end device uses one or more HARQ processes to receive the data packet on one carrier. When transmitting a data packet on multiple carriers using one or more HARQ processes, the receiving end device receives the data packet on multiple carriers using one or more HARQ processes.

In an embodiment, when the receiving end device is a terminal, the method further includes:

and merging the data in the first cache.

Correspondingly, when the receiving end equipment is network equipment, the data packet received by the HARQ thread is stored in a second cache; and merging the data in the second cache.

An embodiment of the present invention further provides a data transmission method, as shown in fig. 4, where the method includes:

step 401: at an MAC layer of sending end equipment, the sending end equipment uses one or more HARQ processes of one HARQ entity to copy and send a data packet;

wherein, one data packet is sent on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet.

Step 402: at the MAC layer of the receiving end device, the receiving end device receives the data packet using one or more HARQ processes of one HARQ entity.

It should be noted that: the specific processing procedures of the sending end device and the receiving end device are described in detail above, and are not described in detail here.

In the data transmission method provided by the embodiment of the invention, at an MAC layer of sending end equipment, the sending end equipment sends a data packet by using one or more HARQ processes of one HARQ entity; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet; in the MAC layer of the receiving end device, the receiving end device receives a data packet using one or more HARQ processes of one HARQ entity, and implements multiplexing transmission of one data packet in the MAC layer through the one or more HARQ processes of one HARQ entity, thereby implementing multiplexing transmission in the MAC layer.

The present invention will be described in further detail with reference to the following application examples.

In this application embodiment, when allocating air interface resources, independent time-frequency domain resources are allocated to each data packet on one transmission opportunity (for example, one timeslot) according to multiple separate data packets, and there is no overlap between resources corresponding to the data packets. Fig. 5 shows a diagram of allocated PRBs scheduled in one slot (slot). As can be seen from fig. 5, each data packet corresponds to one PRB. In practical applications, the PRBs for multiplexing may be allocated at multiple time-frequency-domain positions of the entire resource bandwidth.

In actual application, the resource of each data packet can be allocated according to needs. For example, the location for allocating each PRB may be selected according to the measured channel quality of the terminal in the entire system bandwidth. For example, the system bandwidth 100MHz is a large bandwidth, and the transmission and reception quality of the user at each RE is different, so a plurality of corresponding PRB blocks are allocated to the terminal according to the system measurement.

Based on this, the corresponding resource used for transmitting each data packet may be at least one PRB or at least one Resource Element (RE) in actual application.

Herein, the PRB is from the perspective of PHY, and may be referred to as Resource Block (RB) from the perspective of radio bearer.

In this application embodiment, fig. 6 shows a downlink L2 architecture (under CA and non-CA), and fig. 7 shows an uplink L2 architecture (under CA and non-CA), and it can be seen from fig. 6 and fig. 7 that, no matter in a CA scenario or a non-CA scenario, there is only one HARQ entity in each direction in the uplink and downlink directions, and in one receiving and transmitting process, one or more HARQ processes may be used, and if multiplexing is started, one HARQ process may carry multiple multiplexed data packets, or multiple HARQ processes carry identical data packets.

The process of multiplexing HARQ processes from the downlink direction and the uplink direction is described below.

First, the downstream direction is described.

In the downlink direction, as shown in fig. 8, there is only one HARQ entity regardless of data transmission between CCs of the CA, data transmission within one CC of the CA, or data transmission within a carrier under non-CA. Meanwhile, when the network side sends downlink data to a UE on each carrier (including CC under CA and non-CA carriers), the process using the HARQ entity may use one HARQ process or multiple HARQ processes, for example, one process using one CC. The scheduler of the MAC layer at the base station side selects different time-frequency domain resources to simultaneously transmit the same data packet during scheduling. And different time frequency resources are used for data transmission aiming at uplink and downlink allocation.

The scheduler manages HARQ of the UE in a unified mode, then each CC carries out scheduling and priority management on each UE independently, and when the UE is scheduled, HARQ information used when data are sent to the UE is obtained from the unified HARQ and comprises a Process ID. At this time, the HARQ entity may allocate the same HARQ process on each carrier for the UE according to the set decision method, or may allocate different HARQ processes. This method is applicable not only to transmission of normal packets but also to transmission of MAC layer duplicate packets. When the data packet of the UE needs to be multiplexed, one HARQ process may be used to send data between CCs (for multiple CC transmission) or within one CC, or different HARQ processes may be used to send data between CCs or within one CC. Of course, if the data packet is a normal data packet, the data packet may be sent in one HARQ process between CCs or in one CC, or data may be sent in different HARQ processes between CCs or in one CC.

When only one HARQ process is used for CC inter-CC transmission, if the data packets on different CCs are different, the receiving end (i.e., the UE side, and the receiving end in the downlink direction is the UE) sets a corresponding receiving buffer on each CC. If the data packets sent on different CCs are completely the same, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from each CC need to be merged and decoded in the buffer, and the HARQ information carried by the Physical Downlink Control Channel (PDCCH) needs to carry the information of the data packet multiplexing (that is, data sending information), including an identifier for starting the data packet multiplexing, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

When a plurality of HARQ processes are used, when data packets on different CCs are different, a receiving end (namely a UE side, and the receiving end in the downlink direction is the UE) sets a corresponding receiving cache on each CC, namely sets a receiving cache for each HARQ process; when the data packets sent on different CCs are completely the same, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from each CC need to be merged and decoded in the buffer, and HARQ information carried by the PDCCH needs to carry data packet multiplexing information, including an identifier for starting data packet multiplexing, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

For CC internal transmission of CA, when only one HARQ process is used, if a data packet on the CC is normally transmitted, that is, there is no multiplexing (normal data packet), a receiving end (that is, a UE side, and the receiving end in the downlink direction is a UE) sets a corresponding receiving buffer on the CC. If the data packets sent on the CC are completely the same, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from the CC need to be merged and decoded in the buffer, and HARQ information carried in the PDCCH needs to carry information for multiplexing the data packets (that is, data sending information), including an identifier for starting the multiplexing of the data packets, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

When multiple HARQ processes are used, if the data packet on the CC is normally sent, i.e. there is no multiplexing (normal data packet), the receiving end (i.e. UE side, the receiving end in the downlink direction is UE) sets a corresponding receiving buffer on the CC. When the data packets sent on the CC are completely the same, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from the CC all need to be merged and decoded in the buffer, and HARQ information carried by the PDCCH needs to carry information for multiplexing the data packets (that is, data sending information), including an identifier for starting multiplexing the data packets, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

For non-CA single carrier transmission, only one HARQ process is used, and if the data packet on the CC is normally transmitted, i.e. there is no multiplexing (normal data packet), the receiving end (i.e. UE side, the receiving end in the downlink direction is UE) sets a corresponding receiving buffer on the CC. If the data packets sent on the CC are identical, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from the CC need to be merged and decoded in the buffer, and HARQ information carried by the PDCCH needs to carry information for multiplexing the data packets (that is, data sending information), including an identifier for starting multiplexing the data packets, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

Using multiple HARQ processes, if the TB on the CC is normally sent, i.e. there is no multiplexing (normal data packet), the receiving end (i.e. UE side, the receiving end in downlink direction is UE) sets a corresponding receiving buffer on the CC. If the data packets sent on the CC are identical, that is, the data packets are multiplexed, only one receiving buffer is set at the receiving end, the data packets received from the CC need to be merged and decoded in the buffer, and HARQ information carried by the PDCCH needs to carry information for multiplexing the data packets (that is, data sending information), including an identifier for starting multiplexing the data packets, time-frequency resource information of each multiplexed data packet, modulation information, and the like.

Next, the uplink direction is described.

In the uplink direction, since uplink transmission is UE transmission to the base station, uplink transmission occurs only in one UE, and therefore, as shown in fig. 9, HARQ entities are defined in units of UEs. One UE has only one HARQ entity, whether the UE transmits on a CA multi-carrier or a non-CA single carrier. When the UE transmits uplink data on each carrier (including CC under CA and non-CA carriers), one HARQ process of the HARQ entity may be used, or multiple HARQ processes of the HARQ entity may be used.

The uplink transmission indicates whether to start MAC layer packet multiplexing and how to use HARQ processes through a PDCCH on the base station side, specifically including using one or more HARQ processes on different or the same CCs of the CA, or using one or more HARQ processes on carriers under non-CA.

When the UE transmits uplink data, the scheduler obtains HARQ information including a Process ID, which is used when the UE transmits data, from the unified HARQ. At this time, the HARQ entity may allocate the same HARQ process on each carrier for the UE according to the set decision method, or may allocate different HARQ processes. When the MAC layer packet of the UE needs to be multiplexed, one HARQ process may be used to send data between CCs (for multiple CC transmission) or within a CC, or different HARQ processes may be used to send data between CCs or within a CC. Of course, if the data packet is a normal data packet, the data packet may be sent in one HARQ process between CCs or in one CC, or the data packet may be sent in one CC or between CCs by using different HARQ processes.

For sending between CCs of CA, only one HARQ process is used, and if data packets on different CCs are different, a receiving end (i.e., a base station side, and a receiving end in an uplink direction is a base station) sets a corresponding receiving buffer on each CC. If the data packets sent on different CCs are identical, i.e. multiplexing of the data packets, only one receiving buffer is set at the receiving end, and the data packets received from each CC are merged and decoded in the buffer.

When the data packets on different CCs are different, the receiving end device sets a corresponding receiving buffer on each CC, that is, sets a receiving buffer for each HARQ process. If the data packets sent on different CCs are identical, i.e. the data packets are multiplexed, only one receiving buffer is set at the receiving end, and the data packets received from each CC need to be code-combined in the buffer.

For CC internal transmission of CA, only one HARQ process is used, and if the data packet on the CC is normally transmitted, i.e. there is no multiplexing (normal data packet), the receiving end sets a corresponding receiving buffer on the CC. If the data packets sent on the CC are identical, i.e. the data packets are multiplexed, only one receiving buffer is provided on the receiving end, and the data packets received from the CC need to be code-combined in the buffer.

Using multiple HARQ processes, when the data packet on the CC is normally sent, i.e. there is no multiplexing (normal data packet), the receiving end sets a corresponding receiving buffer on the CC. When the data packets sent on the CC are identical, that is, the data packets are multiplexed, only one receiving buffer is provided at the receiving end, and the data packets received from the CC need to be coded and combined in the buffer.

For non-CA single carrier transmission, only one HARQ process is used, and if the TB on the CC is normal transmission, i.e. there is no multiplexing (normal data packet), the receiving end sets a corresponding receive buffer on the CC. If the data packets sent on the CC are identical, i.e. the data packets are multiplexed, only one receiving buffer is provided on the receiving end, and the data packets received from the CC need to be code-combined in the buffer.

Using multiple HARQ processes, if the data packet on the CC is normally sent, i.e. there is no multiplexing (normal data packet), the receiving end sets a corresponding receive buffer on the CC. If the data packets sent on the CC are identical, i.e. the data packets are multiplexed, only one receiving buffer is set at the receiving end, and the data packets received from the CC need to be code-combined in the buffer, i.e. combined decoding.

As can be seen from the above description, the scheme of the embodiment of the present invention implements multiplexing transmission of one data packet at the MAC layer through one or more processes of one HARQ entity. The PRB resources used by the HARQ entity for multiplexing transmission may be on each CC of the CA, or may be within one CC.

The scheme provided by the embodiment of the invention supports the multiplexing of data packets in the band and between the bands. Meanwhile, unified allocation of HARQ processes is realized.

In addition, the scheme of the embodiment of the invention has good compatibility and can be compatible with 3G, 4G and 5G networks. In 3G or 4G network, the transmission can be directly carried out one by one.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a data transmission apparatus, which is disposed on the sending end device, and as shown in fig. 10, the apparatus includes:

a sending unit 101, configured to use one or more HARQ processes of one HARQ entity to copy and send a data packet at an MAC layer of the sending end device; wherein,

one data packet is sent on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet.

In an embodiment, as shown in fig. 10, the apparatus may further include:

a selecting unit 102, configured to select one or more HARQ processes for copying and sending a data packet after receiving the source data packet.

In an embodiment, the sending unit 101 is specifically configured to:

transmitting a data packet on one carrier using one or more HARQ processes;

or,

In an embodiment, the sending unit 101 is specifically configured to:

transmitting a data packet on one CC under CA using one or more HARQ processes;

or,

In an embodiment, the sending end device is a network device, and the sending unit 101 is further configured to:

when a plurality of HARQ processes send data packets, sending data sending information of the data packets on an HARQ process TB to receiving end equipment; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB.

In an embodiment, the sending unit 101 is specifically configured to:

transmitting the data transmission information to the receiving terminal equipment through RRC signaling;

In an embodiment, the sending end device is a terminal, and the apparatus may further include: a receiving unit configured to:

when a plurality of HARQ processes send data packets, receiving data sending information of the data packets sent by network equipment on an HARQ process TB;

In an embodiment, the receiving unit is specifically configured to:

In practical application, the sending unit 101 and the receiving unit may be implemented by a communication interface in a data transmission device; the selection unit 102 may be implemented by a processor in a data transmission device.

In order to implement the method at the receiving end device side in the embodiment of the present invention, an embodiment of the present invention further provides a data transmission apparatus, which is disposed on the receiving end device, and as shown in fig. 11, the apparatus includes:

a receiving unit 111, configured to receive, at an MAC layer of the receiving end device, a data packet by using one or more HARQ processes of one HARQ entity; wherein,

In an embodiment, the receiving unit 111 is specifically configured to:

receiving a data packet on one carrier using one or more HARQ processes;

or,

In an embodiment, the receiving unit 111 is specifically configured to:

transmitting a data packet on one CC under CA using one or more HARQ processes;

or,

In an embodiment, the receiving end device is a terminal, and the receiving unit 111 is further configured to: receiving data transmission information of a data packet sent by network equipment on an HARQ process TB;

accordingly, as shown in fig. 11, the apparatus may further include: a processing unit 112 for:

and merging the data in the first cache.

In an embodiment, the receiving unit 111 is specifically configured to:

In practical applications, the receiving unit 111 may be implemented by a communication interface in a data transmission device; the processing unit 112 may be implemented by a processor in a data transmission device.

It should be noted that: in the data transmission device provided in the above embodiment, only the division of the program modules is exemplified when data transmission is performed, and in practical applications, the processing distribution may be completed by different program modules according to needs, that is, the internal structure of the device may be divided into different program modules to complete all or part of the processing described above. In addition, the data transmission device and the data transmission method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.

Based on the hardware implementation of the program module, and in order to implement the method at the sending end device side in the embodiment of the present invention, an embodiment of the present invention further provides a sending end device, and as shown in fig. 11, the sending end device 120 includes:

a first communication interface 121, which is capable of performing information interaction with a receiving end device;

the first processor 122 is connected to the first communication interface 121 to implement information interaction with a receiving end device, and is configured to execute a method provided by one or more technical solutions of the sending end device side when running a computer program. And the computer program is stored on the first memory 123.

Specifically, the first communication interface 121 is configured to, at an MAC layer of the sending-end device, copy and send a data packet by using one or more HARQ processes of one HARQ entity; wherein,

In an embodiment, the first processor 122 is configured to dynamically select one or more HARQ processes for data transmission after receiving the source data packet.

In an embodiment, the first communication interface 121 is specifically configured to:

transmitting a data packet on one carrier using one or more HARQ processes;

or,

transmitting a data packet on one CC under CA using one or more HARQ processes;

or,

In an embodiment, the sending end device is a network device, and the first communication interface 121 is further configured to:

In an embodiment, the sending end device is a terminal, and the first communication interface 121 is further configured to:

and determining the data transmission mode of the data packet on the HARQ process TB by using the data transmission information.

receiving the data transmission information transmitted by the network equipment through DCI;

It should be noted that: the specific processes of the first processor 122 and the first communication interface 121 can be understood with reference to the above-described methods.

Of course, in practice, the various components in the initiator device 120 are coupled together by a bus system 124. It will be appreciated that the bus system 124 is used to enable communications among the components. The bus system 124 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 124 in fig. 12.

The first memory 123 in the embodiment of the present invention is used to store various types of data to support the operation of the transmitting end device 120. Examples of such data include: any computer program for operation on the sender device 120.

The method disclosed in the above embodiments of the present invention may be applied to the first processor 122, or implemented by the first processor 122. The first processor 122 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the first processor 122. The first Processor 122 may be a general-purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The first processor 122 may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the first memory 123, and the first processor 122 reads the information in the first memory 123, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the sender Device 120 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, programmable Logic Devices (PLDs), complex Programmable Logic Devices (CPLDs), field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

Based on the hardware implementation of the program module, and in order to implement the method on the side of the receiving end device in the embodiment of the present invention, an embodiment of the present invention further provides a receiving end device, as shown in fig. 13, where the receiving end device 130 includes:

a second communication interface 131, which can perform information interaction with the sending-end device;

the second processor 132 is connected to the second communication interface 131 to implement information interaction with the sending end device, and is configured to execute a method provided by one or more technical solutions of the receiving end device side when running a computer program. And the computer program is stored on the second memory 133.

Specifically, the second communication interface 131 is configured to receive, at the MAC layer of the receiving end device, a data packet by using one or more HARQ processes of one HARQ entity; wherein,

In an embodiment, the second communication interface 131 is specifically configured to:

receiving a data packet on one carrier using one or more HARQ processes;

or,

transmitting a data packet on one CC under CA using one or more HARQ processes;

or,

In an embodiment, the receiving end device is a terminal, and the second communication interface 131 is further configured to: receiving data transmission information of a data packet sent by network equipment on an HARQ process TB;

accordingly, the second processor 132 is configured to:

and merging the data in the first cache.

It should be noted that: the specific processes of the second processor 132 and the second communication interface 131 can be understood with reference to the above-described methods.

Of course, in practice, the various components in the sink device 130 are coupled together by the bus system 134. It will be appreciated that the bus system 134 is used to enable communications among the components. The bus system 134 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 134 in FIG. 13.

The second memory 133 in the embodiment of the present invention is used to store various types of data to support the operation of the receiving end device 130. Examples of such data include: any computer program for operating on the sink device 130.

The method disclosed in the above embodiments of the present invention may be applied to the second processor 132, or implemented by the second processor 132. The second processor 132 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the second processor 132. The second processor 132 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 132 may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the second memory 133, and the second processor 132 reads the information in the second memory 133 and, in combination with its hardware, performs the steps of the foregoing method.

In an exemplary embodiment, the sink device 130 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components for performing the aforementioned methods.

It will be appreciated that the memories (first memory 123, second memory 133) of embodiments of the invention may be volatile or non-volatile memories, and may include both volatile and non-volatile memories. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), synchronous Static Random Access Memory (SSRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), synchronous Dynamic Random Access Memory (SLDRAM), direct Memory (DRmb Access), and Random Access Memory (DRAM). The described memory for embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

In order to implement the method according to the embodiment of the present invention, an embodiment of the present invention further provides a data transmission system, as shown in fig. 14, where the system includes:

the sending end device 141 is configured to copy and send a data packet by using one or more HARQ processes of one HARQ entity on the MAC layer; one data packet is sent on one or more HARQ processes; the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet;

a receiving end device 142, configured to receive, at the MAC layer, a data packet using one or more HARQ processes of one HARQ entity; the data packet received by the HARQ process is a source packet or is obtained by copying the source packet.

It should be noted that: the specific processing procedures of the initiator device 141 and the sink device 142 are described in detail above, and are not described here again.

In an exemplary embodiment, the present invention further provides a storage medium, specifically a computer-readable storage medium, for example, the storage medium includes a first memory 123 storing a computer program, and the computer program is executable by the first processor 122 of the transmitting-end device 120 to perform the steps of the side-by-side method of the transmitting-end device. For example, the second memory 133 may store a computer program, which may be executed by the second processor 132 of the receiving device 130 to perform the steps of the receiving device side method. The computer readable storage medium may be Memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In addition, the technical solutions described in the embodiments of the present invention may be arbitrarily combined without conflict.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A data transmission method is applied to sending terminal equipment and comprises the following steps:

at a Media Access Control (MAC) layer of the sending end equipment, copying and sending a data packet by using one or more hybrid automatic repeat request (HARQ) processes of a HARQ entity; wherein,

the data packet sent by the HARQ process is a source data packet or is obtained by copying the source data packet; wherein,

transmitting a data packet on one carrier using one or more HARQ processes; or, one or more HARQ processes are used for sending data packets in a plurality of carriers;

one or more HARQ processes of one HARQ entity correspond to one receiving buffer;

when a plurality of HARQ processes are used for transmitting data packets, the method further comprises the following steps:

when the sending end equipment is network equipment, sending data sending information of a data packet on a transmission block TB of the HARQ process to receiving end equipment; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB;

or,

when the sending end equipment is a terminal, receiving data sending information of a data packet sent by network equipment on an HARQ process TB; and determining a data transmission mode of the data packet on the HARQ process TB by using the data transmission information.

2. The method of claim 1, further comprising:

and after receiving the source data packet, selecting the one or more HARQ processes for copying and sending the data packet.

3. The method of claim 1, wherein one or more HARQ processes are used to send a data packet on one carrier component CC under carrier aggregation CA;

or,

4. The method according to any of claims 1 to 3, wherein the data transmission information is transmitted to the receiving end device by one of:

sending the data sending information to the receiving terminal equipment through Downlink Control Information (DCI);

transmitting the data transmission information to the receiving terminal equipment through Radio Resource Control (RRC) signaling;

and transmitting the data transmission information to the receiving end equipment through a media access control element (MAC CE).

5. The method according to any one of claims 1 to 3, wherein the data transmission information transmitted by the network device is received by one of the following methods:

6. A data transmission method is applied to a receiving end device, and comprises the following steps:

the data packet received by the HARQ process is a source data packet or is obtained by copying the source data packet; wherein,

receiving a data packet on one carrier using one or more HARQ processes; or, receiving data packets at a plurality of carriers by using one or a plurality of HARQ processes;

when receiving a data packet using a plurality of HARQ processes, the method further comprises:

when the receiving terminal equipment is a terminal, receiving data transmission information of a data packet transmitted by network equipment on a HARQ process TB; determining a receiving mode of a data packet on a HARQ process TB based on the data transmission information;

or,

when the receiving end equipment is network equipment, sending data sending information of a data packet on a HARQ process TB to the sending end equipment; the data transmission information is used for the sending end device to determine the data transmission mode of the data packet on the HARQ process TB.

7. The method of claim 6, wherein one or more HARQ processes are used to send a data packet on one CC under CA;

or,

8. The method according to claim 6 or 7, wherein the receiving end device is a terminal, and the method further comprises:

storing data packets received through a plurality of HARQ threads into a first cache;

and merging the data in the first cache.

9. The method of claim 8, wherein the information related to data transmission sent by the network device is received by one of the following methods:

10. A data transmission apparatus, provided on a sending-end device, comprising:

the sending unit is configured to send a data packet on one carrier by using one or more HARQ processes; or, for transmitting data packets in multiple carriers using one or more HARQ processes;

when a plurality of HARQ processes are used to send a data packet, and the sending end device is a network device, the sending unit is further configured to send data sending information of the data packet on an HARQ process TB to a receiving end device; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB; or, when multiple HARQ processes are used to send a data packet, and the sending end device is a terminal, the apparatus further includes a receiving unit, where the receiving unit is configured to receive data transmission information of the data packet sent by the network device on an HARQ process TB, and determine a data transmission mode of the data packet on the HARQ process TB by using the data transmission information.

11. A data transmission apparatus, provided on a receiving-end device, comprising:

the receiving unit is configured to receive a data packet on one carrier by using one or more HARQ processes; or, the receiving buffer is configured to receive the data packet on multiple carriers by using one or multiple HARQ processes, where the multiple carriers correspond to one receiving buffer;

when a plurality of HARQ processes are used to receive a data packet, and the receiving end device is a terminal, the apparatus further includes a processing unit, where the receiving unit is further configured to receive data transmission information of the data packet sent by the network device on an HARQ process TB, and the processing unit is configured to determine, based on the data transmission information, a receiving mode of the data packet on the HARQ process TB; or, when multiple HARQ processes are used to receive a data packet, and the receiving end device is a network device, the receiving unit is further configured to send data transmission information of the data packet on an HARQ process TB to the sending end device; the data transmission information is used for the sending end device to determine a data transmission mode of the data packet on the HARQ process TB.

12. A transmitting-end device, comprising: a first processor and a first communication interface; wherein,

the first communication interface is used for transmitting a data packet on one carrier by using one or more HARQ processes; or, for transmitting data packets in multiple carriers using one or more HARQ processes;

when a plurality of HARQ processes are used for sending data packets, and the sending end equipment is network equipment, the first communication interface is also used for sending data sending information of the data packets on an HARQ process TB to receiving end equipment; the data transmission information is used for the receiving end equipment to determine the receiving mode of the data packet on the HARQ process TB; or, when multiple HARQ processes are used to send a data packet, and the sending end device is a terminal, the first communication interface is further configured to receive data sending information, sent by the network device, of the data packet on an HARQ process TB, and determine, by using the data sending information, a data sending mode of the data packet on the HARQ process TB.

13. A receiving-end device, comprising: a second processor and a second communication interface; wherein,

the second communication interface is configured to receive a data packet on one carrier using one or more HARQ processes; or, the receiving buffer is configured to receive the data packet in multiple carriers by using one or more HARQ processes, where the multiple carriers correspond to one receiving buffer;

when a plurality of HARQ processes are used to receive a data packet, and the receiving end device is a terminal, the second communication interface is further configured to receive data transmission information, sent by a network device, of the data packet on an HARQ process TB, and the second processor is configured to determine, based on the data transmission information, a receiving mode of the data packet on the HARQ process TB; or, when a plurality of HARQ processes are used to receive a data packet, and the receiving end device is a network device, the second communication interface is further configured to send data transmission information of the data packet on an HARQ process TB to the sending end device; and the data transmission information is used for the sending end equipment to determine the data transmission of the data packet on the HARQ process TB.

14. A transmitting-end device, comprising: a first processor and a first memory for storing a computer program capable of running on the processor,

wherein the first processor is adapted to perform the steps of the method of any one of claims 1 to 5 when running the computer program.

15. A receiving-end device, comprising: a second processor and a second memory for storing a computer program capable of running on the processor,

wherein the second processor is adapted to perform the steps of the method of any of claims 6 to 9 when running the computer program.

16. A storage medium having stored thereon a computer program for performing the steps of the method of any one of claims 1 to 5, or for performing the steps of the method of any one of claims 6 to 9, when the computer program is executed by a processor.