CN111698726B

CN111698726B - Data transmission method, device, related equipment and storage medium

Info

Publication number: CN111698726B
Application number: CN201910190667.5A
Authority: CN
Inventors: 李娜; 陈卓
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: 2019-03-13
Filing date: 2019-03-13
Publication date: 2023-07-25
Anticipated expiration: 2039-03-13
Also published as: CN111698726A

Abstract

The invention discloses a data transmission method, a data transmission device, a transmitting terminal device, a receiving terminal device and a storage medium. The method comprises the following steps: the sending terminal equipment determines the value of N according to a preset rule; n characterizes the number of Protocol Data Units (PDUs) carrying a poll flag; n is an integer greater than or equal to 2; setting polling flag bits in N continuous PDUs; n polling flags represent a polling request; and sending out the N continuous PDUs.

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

After the transmitting end needs to receive the STATUS protocol data unit (STATUS PDU), it is possible to update VT (a), and the transmitting window may move forward. If the status pdu transmitted from the peer is not received for a long time, it may cause blocking of a transmission window and eventually a decrease in throughput. Under certain conditions, the transmitting end needs to actively request the receiving end to transmit STATUS PDU, which is the role of polling (polling).

The new air interface (NR) vehicle and external information interaction (V2X) service all put forward higher demands on data rate, time delay and reliability indexes. To meet reliability requirements, one implementation is to introduce Radio Link Control (RLC) acknowledgements (AM mode) in a sidelink (sidelink) multicast scenario and support a polling mechanism.

However, in the multicast scenario, if a receiving end fails to accurately receive a polling request, retransmission of an Acknowledged Mode Data (AMD) Protocol Data Unit (PDU) carrying the polling request is required. At this time, the PDU corresponding to the retransmission polling request and the status reporting process will bring additional delay overhead, thereby affecting the performance such as data rate.

Disclosure of Invention

In order to solve the existing technical problems, the invention provides a data transmission method, a data transmission device, related equipment 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 a transmitting terminal device and comprises the following steps:

determining the value of N according to a preset rule; n represents the number of PDUs carrying polling bit flags (polling bits); n is an integer greater than or equal to 2;

setting polling bit in N continuous PDU; n polling bits represent a polling request;

And sending out the N continuous PDUs.

In the above scheme, the determining the value of N according to the preset rule includes one of the following:

taking the number of network configurations as the value of N;

determining the value of N according to the service quality (QoS) of the transmitted data and the corresponding relation between the number of PDU carrying polling bit and QoS;

autonomously determining the value of N;

the value of N is determined through negotiation with the receiving end equipment.

In the above scheme, when determining the value of N according to the QoS of the transmission data and the corresponding relationship between the number of PDUs carrying polling bits and the QoS, the method further includes:

and receiving the corresponding relation between the PDU quantity carrying the polling bit and QoS configured by the network side.

In the above scheme, the corresponding relation between the number of PDUs carrying polling bits and QoS configured by the receiving network side includes:

and receiving the corresponding relation between the PDU quantity carrying the polling bit and QoS configured by the network side through a Radio Resource Control (RRC) special signaling or system message.

In the above scheme, the QoS is at least one of the following:

a 5G QoS flag (5QI,5G QoS Identifier);

V2X QoS flags (VQI, V2X QoS Identifier);

a 5QI value (PQI) on the PC5 interface;

near field communication data Packet Priority (PPPP, proSe Per-Packet Priority);

Near field communication data packet reliability (PPPR, proSe Per-Packet Reliability).

In the above scheme, when the polling bit is set, the method further includes:

and setting the POLL_SN as the sequence number SN of the PDU sent by the first one of the N PDUs.

In the above scheme, the method further comprises:

retransmission of the returned NACK PDU is performed by one of the following means:

retransmitting the PDU fed back as NACK when receiving NACK in the process of receiving all receiving end responses;

and after receiving the responses of all the receiving ends, retransmitting all the PDUs with the feedback of NACK.

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

receiving a PDU sent by a sending terminal device;

determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; the polling bit in the N PDU characterizes a polling request;

m responses to the polling request are sent to the sending terminal equipment.

In the above scheme, the determining the value of M according to the preset rule includes:

taking the response quantity of the network configuration as the value of M;

Determining the value of M according to the corresponding relation of QoS, response quantity and QoS of the received data;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

In the above scheme, when determining the value of M according to the corresponding relationship between QoS, the number of responses, and QoS of the received data, the method further includes:

and receiving the corresponding relation between the response quantity configured by the network side and QoS.

In the above solution, the corresponding relationship between the response number configured by the receiving network side and QoS includes:

receiving the corresponding relation between the response quantity configured by the network side and QoS through one of the following messages:

RRC dedicated signaling;

a system message;

PC5 interface messages.

In the above scheme, the QoS is at least one of the following:

5QI；

VQI；

PQI；

PPPP；

PPPR。

the embodiment of the invention also provides a data transmission device, which comprises:

the first determining unit is used for determining the value of N according to a preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2;

the first transmission unit is used for setting polling bit in N continuous PDU; n polingbits characterize a polling request; and transmitting the N consecutive PDUs.

In the above aspect, the first determining unit is specifically configured to:

Taking the number of network configurations as the value of N;

determining the value of N according to the QoS of the transmitted data and the corresponding relation between the PDU quantity carrying the polling bit and the QoS;

autonomously determining the value of N;

In the above scheme, the device further includes:

and the first receiving unit is used for receiving the corresponding relation between the number of PDUs carrying the polling bit and QoS configured at the network side.

In the above solution, the first transmission unit is further configured to: and setting the POLL_SN as the SN of the PDU sent by the first one of the N PDUs.

In the above scheme, the first transmission unit is further configured to retransmit the PDU of the NACK fed back by one of the following manners:

a second receiving unit, configured to receive a PDU sent by a sending end device;

the second determining unit is used for determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; the polling bit in the N PDU characterizes a polling request;

And the second transmission unit is used for transmitting M responses to the polling request to the transmitting end equipment.

In the above aspect, the second determining unit is specifically configured to:

taking the response quantity of the network configuration as the value of M;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

In the above scheme, the second receiving unit is further configured to receive a corresponding relationship between the response number configured by the network side and QoS.

The embodiment of the invention also provides a transmitting end device, which comprises:

the first processor is used for determining the value of N according to a preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2; setting pollingbit in N continuous PDU; n polling bits represent a polling request;

and the first communication interface is used for sending out the N continuous PDUs.

In the above solution, the first processor is specifically configured to:

taking the number of network configurations as the value of N;

Autonomously determining the value of N;

In the above scheme, the first communication interface is further configured to receive a corresponding relationship between the number of PDUs carrying polling bits configured by the network side and QoS.

In the above solution, the first processor is further configured to set poll_sn to SN of a PDU sent by a first one of the N PDUs.

In the above solution, the first processor is further configured to retransmit the PDU of NACK fed back by one of the following manners:

retransmitting the PDU fed back as NACK through the first communication interface when receiving NACK in the process of receiving all receiving end responses;

and after receiving the responses of all receiving ends, retransmitting all the PDU fed back as NACK through the first communication interface.

The invention also provides a receiving end device, which comprises:

the second communication interface is used for receiving the PDU sent by the sending terminal equipment; and sending M responses to the polling request to the sender device;

the second processor is used for determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; the polling bit in the N PDUs characterizes a poll request.

In the above solution, the second processor is specifically configured to:

taking the response quantity of the network configuration as the value of M;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

In the above solution, the second communication interface is further configured to receive a correspondence between the number of responses configured by the network side and QoS.

The embodiment of the invention also provides a transmitting end device, which comprises: a first processor and a first memory for storing a computer program capable of running on the processor,

the first processor is configured to execute any method step on the transmitting side when running the computer program.

The embodiment of the invention also provides receiving end equipment, which comprises: a second processor and a second memory for storing a computer program capable of running on the processor,

and the second processor is used for executing any method step on the receiving end equipment side when the computer program is run.

The embodiment of the invention also provides a storage medium, on which a computer program is stored, the computer program, when executed by a processor, realizes the steps of any method at the transmitting end equipment side or realizes the steps of any method at the receiving end equipment side.

According to the data transmission method, the data transmission device, the related equipment and the storage medium provided by the embodiment of the invention, the sending end equipment determines the value of N according to the preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2; setting polling bit in N continuous PDU; n polingbits characterize a polling request; and transmitting the N continuous PDUs; and the receiving end equipment receives the PDU sent by the sending end equipment; determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; m responses to the polling request are sent to the sending terminal equipment, and the sending terminal equipment carries polling bits for the same polling request in at least two continuous AMD PDUs, so that the correct receiving probability of the polling bits in the receiving terminal equipment can be ensured, the additional time delay expenditure caused by the process of retransmitting the polling request and the status report is avoided, and the performances such as data rate and the like are ensured.

Drawings

FIG. 1 is a schematic diagram of an AMD PDU format;

fig. 2 is a flow chart of a method for transmitting data at a transmitting end device according to an embodiment of the present invention;

Fig. 3 is a flow chart of a method for transmitting data at a receiving end device according to an embodiment of the present invention;

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

fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another data transmission device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a transmitting device structure according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a receiving-end device according to an embodiment of the present invention;

fig. 9 is a schematic 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.

The basic idea of the Polling mechanism is: the transmitting end actively requests the opposite end (i.e. the receiving end) to transmit a STATUS PDU. When transmitting the polling request, the transmitting end sets the P field in the transmitted RLC data PDU (i.e., AMD PDU) to 1, and sets pdu_without_poll and byte_without_poll to 0. The pdu_window_poll is used to count the number of AMD PDUs transmitted since the last AMD PDU with the P field set to 1. Byte_window_poll is used to count the number of data BYTEs transmitted since the last AMD PDU with P field set to 1.

Specifically, every time a new AMD PDU is generated, pdu_wide_poll will be incremented by 1, byte_wide_poll will be incremented by the new number of bytes per data field element (Data field element).

Fig. 1 shows a format of an AMD PDU. As shown in fig. 1, the P field indicates a Polling bit, and when the value of the P field is 1, the P field indicates that the sender requests the opposite end to send a STATUS report (report); when the value is 0, the opposite end is not requested to send a STATUS report.

In addition, in order to determine whether the peer has received a polling request, the AM entity defines a timer, i.e., t-poll. If the t-poll retransmission times out, the opposite end does not receive the polling request, and the sending end retransmits the polling request in a next transmission opportunity. When the transmitting end receives a STATUS report, i.e. a STATUS PDU, and the report contains a positive or negative acknowledgement of the RLC data PDU with sn=poll_sn (indicating that the receiving end has received the corresponding polling request), if the t-POLL retransmission is running, i.e. has not timed out, the transmitting end will stop and reset the t-POLL retransmission.

In the related art, in the following scenarios, a transmitting end actively requests an opposite end to transmit a STATUS PDU:

Scene 1: when the number of AMD PDUs transmitted is greater than or equal to the set number of PDUs, i.e., POLL, i.e., pdu_window_poll is greater than or equal to POLL, i.e., at most, one POLL is actively initiated after a maximum of AMD PDUs with a P field set to 1.

Scene 2: when the number of data BYTEs transmitted exceeds polbyte, i.e., byte_window_poll is greater than or equal to polbyte, from the AMD PDU with the P field set to 1 last transmitted. That is, poling needs to be actively initiated once after the maximum polibyte byte data is spaced.

Scene 3: after an AMD PDU or AMD PDU segment is assembled, the transmission buffer and retransmission buffer are empty except for those RLC data PDUs that have been transmitted and waiting for acknowledgement. I.e. the AM entity considers that the data has been sent out in its entirety, a polling need to be initiated once.

Scene 4: when a new RLC data PDU cannot be continuously transmitted after an AMD PDU or an AMD PDU segment (segment) is assembled, for example, when the new RLC data PDU cannot be transmitted due to a transmission window blocking, the transmitting end actively initiates polling once, so as to update the value of the maximum transmission state variable VT (a) in time.

Scene 5: the timer t-poll timeout times out.

The NR V2X service puts higher demands on data rate, latency, reliability index. To meet reliability requirements, one implementation is to introduce RLC AM mode in sidelink multicasting and support poling mechanisms. However, in the process of applying the polling mechanism, if a certain receiving end fails to accurately receive the polling request (the receiving end determines whether the polling request is received by the timer t-poll timeout), it is necessary to retransmit the AMD PDU carrying the polling request. At this time, the PDU corresponding to the retransmission polling request and the status reporting process will bring additional delay overhead, thereby affecting the performance such as data rate.

Based on this, in various embodiments of the present invention, the sender device carries a polling bit in at least two consecutive AMD PDUs.

The embodiment of the invention provides a data transmission method, which is applied to a transmitting end device, as shown in fig. 2, and comprises the following steps:

step 201: determining the value of N according to a preset rule;

here, N characterizes the number of PDUs carrying polling bits; n is an integer greater than or equal to 2.

Specifically, the sender device may determine the value of N in one of the following manners:

Taking the number of network (such as base station) configuration as the value of N;

autonomously determining the value of N;

In practical application, the transmitting end device can determine the value of N in any one of the modes according to the need. For example, the value of N may be determined by setting any of the above ways in advance in the transmitting device.

When the value of N is determined according to the QoS of the transmission data and the corresponding relation between the PDU number carrying the polling bit and the QoS, the corresponding relation between the PDU number of the polling bit and the QoS can be configured by the network side.

Based on this, in an embodiment, when determining the value of N according to the QoS of the transmission data and the corresponding relationship between the number of PDUs carrying the polling bit and the QoS, the method may further include:

and receiving the corresponding relation between the PDU quantity carrying the polling bit and QoS configured at the network (such as a base station) side.

Here, in practical application, the transmitting end device may receive the corresponding relationship between the number of PDUs carrying the polling bit and QoS configured by the network side through RRC dedicated signaling (such as RRC connection reconfiguration message) or system message.

In practical application, the sending end device can determine the value of N according to the QoS of the sending data, and the corresponding relationship between the number of PDUs carrying polling bits corresponding to the sending end device and the QoS.

In practical application, the QoS is at least one of the following:

5QI；

VQI；

PQI；

PPPP；

PPPR。

the manner in which the sender device autonomously determines the value of N depends on the implementation of the terminal, i.e. the sender device determines the value of N entirely, for example, the sender device may determine the value of N randomly without taking other factors into account, or may take other factors into account, for example, the sender device may determine the value of N based on the measured channel result, for example, when the channel quality is poor (e.g. lower than a threshold value), a larger value of N is used, and when the channel quality is good, a smaller value of N is used.

For the manner of determining the value of N through negotiation with the receiving end device, there may be various negotiation manners in practical application, for example, the receiving end device may feed back the measurement result of the channel to the transmitting end device, and the transmitting end device may determine the value of N based on the measured channel result, for example, when the channel quality is poor (for example, lower than a threshold value), a larger value of N is used, and when the channel quality is good, a small value of N is used.

In addition, in actual application, the receiving end equipment participating in negotiation can be at least one.

Step 202: setting polling bit in N continuous PDU;

here, N polling bits characterize one polling request, i.e., N polling bits characterize the same polling request.

In practical applications, when the polling mechanism is adopted, the transmitting end device also needs to maintain a Poll-representing transmission state variable, namely poll_sn.

In the embodiment of the invention, when the polling bit is set, the POLL_SN is set as the SN of the PDU sent by the first one of the N PDUs.

Step 203: and sending out the N continuous PDUs.

In practical application, the transmitting end device may retransmit the PDU fed back with NACK, specifically, the transmitting end device may retransmit the PDU fed back with NACK in one of the following manners:

Correspondingly, the embodiment of the invention also provides a data transmission method, which is applied to the receiving terminal equipment, as shown in fig. 3, and comprises the following steps:

step 301: receiving a PDU sent by a sending terminal device;

Step 302: determining the value of M according to a preset rule;

here, M characterizes the number of responses to N consecutive PDUs carrying polling bits sent by the sender device.

In practical application, M is an integer greater than or equal to 1, and M can be less than or equal to N.

Similar to the sender device determining the value of N, the receiver device may determine the value of M in one of the following ways:

taking the response quantity configured by a network (such as a base station) as the value of M;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

In practical application, the receiving end device may determine the value of M by adopting any one of the above modes according to the need. For example, the value of M may be determined by setting a certain mode in advance in the receiving end device, or the determining mode may be transmitted from the transmitting end device to the receiving end device.

When the value of M is determined according to the corresponding relation of QoS, response quantity and QoS of the received data, the corresponding relation of response quantity and QoS can be configured by the network side.

Based on this, in an embodiment, when determining the value of M according to the corresponding relationship between the QoS of the received data, the number of responses, and the QoS, the method may further include:

The correspondence relation between the number of responses configured at the receiving network (e.g., base station) side and QoS is obtained.

Here, in practical application, the receiving end device may receive the correspondence between the number of responses configured by the network side and QoS through one of the following messages:

RRC dedicated signaling (such as RRC reconfiguration message, etc.);

a system message;

PC5 interface messages.

In practical application, the QoS is at least one of the following:

5QI；

VQI；

PQI；

PPPP；

PPPR。

for the manner in which the receiving end device autonomously determines the value of M, in this manner, depending on the implementation of the terminal, that is, the receiving end device determines the value of M entirely, for example, the receiving end device may determine the value of M randomly without considering other factors, for example, the receiving end device may determine the value of M randomly, or may consider other factors, for example, the receiving end device may determine the value of M based on the measured channel result, for example, when the channel quality is poor (for example, lower than a threshold value), a larger value of M is used, and when the channel quality is good, a smaller value of M is used.

For the manner of determining the value of M through negotiation with the transmitting end device, there may be various negotiation manners in practical application, for example, the transmitting end device may feed back the measurement result of the channel to the receiving end device, and the receiving end device may determine the value of M based on the measured channel result, for example, when the channel quality is poor (e.g., lower than a threshold value), a larger value of M is used, and when the channel quality is good, a small value of M is used.

Step 303: m responses to the polling request are sent to the sending terminal equipment.

In this way, since M responses to the polling request are transmitted, and M is greater than or equal to 2, that is, when at least two responses are transmitted, it can be ensured that the transmitting-end device can receive at least one response message.

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

step 401: the sending terminal equipment determines the value of N according to a preset rule;

Step 402: the transmitting terminal equipment sets polling bit in N continuous PDU; and transmitting the N continuous PDUs;

here, N polling bits characterize one polling request.

Step 403: the receiving terminal equipment receives the PDU sent by the sending terminal equipment; determining the value of M according to a preset rule;

here, M characterizes the number of responses to N consecutive PDUs carrying polling bits sent by the sender device; m is an integer greater than or equal to 1.

Step 404: the receiving end device sends M responses to the polling request to the sending end device.

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

According to the data transmission method provided by the embodiment of the invention, the sending terminal equipment determines the value of N according to the preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2; setting polling bit in N continuous PDU; n polling bits represent a polling request; and transmitting the N continuous PDUs; and the receiving end equipment receives the PDU sent by the sending end equipment; determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; m responses to the polling request are sent to the sending terminal equipment, and the sending terminal equipment carries polling bits for the same polling request in at least two continuous AMD PDUs, so that the correct receiving probability of the polling bits at the receiving terminal equipment can be ensured, namely, the correct receiving probability of the polling bits at the receiving terminal equipment is greatly improved, the additional time delay expenditure brought by the process of retransmitting the polling request and reporting the state is avoided, and the performances such as data rate and the like are ensured.

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

Application example one

In this application embodiment, the sending end device is a mode 1 type internet of vehicles terminal (V-UE, V2X-UE), the receiving end device (also V-UE) is not in RRC connected state (e.g. mode 2 type V-UE), and in a sidelink multicast scenario.

Here, the V-UE of the mode 1 type refers to a V-UE operating in the mode 1 mode.

The distribution mode of the internet of vehicles sidelink resources comprises two modes: mode 1 and mode 2. Wherein mode 1 means that the resources of the transmitting end V-UE are allocated by the base station. Mode 2 means that the resources of the transmitting end V-UE are determined by the terminal after the channel monitoring. The V-UE of the Mode 1 type is in an RRC connection state, and the V-UE of the Mode 2 type can be in an RRC connection state or an RRC idle state.

In the application embodiment, firstly, the mapping relation (corresponding relation) between the network configuration AMD PDU quantity carrying the polling bit and 5QI is configured, and the mapping relation is sent to the V-UE of the transmitting end through RRC special signaling; and, because the receiving terminal V-UE is not in RRC connected state, the network configures a mapping relationship between the number of responses of the receiving terminal to polling and 5QI, that is, a correspondence relationship between the number of responses and QoS, and sends the mapping relationship to the transmitting terminal V-UE through RRC dedicated signaling.

And then, after receiving the mapping relation, the transmitting terminal V-UE transmits the mapping relation between the quantity of response of the receiving terminal V-UE configured by the network to the polling and 5QI to the receiving terminal V-UE through a sidelink interface (PC 5 interface).

When the transmitting terminal V-UE needs to transmit a polling request, namely, from the last AMD PDU with the P field set to 1, the number of transmitted AMD PDUs exceeds that of the POLL PDU, namely, PDU_WITHOUT_POLL is larger than or equal to that of the POLL PDU, the transmitting terminal V-UE carries polling bit in a plurality of continuous AMD PDUs and transmits a plurality of continuous AMD PDUs; wherein, AMD PDU quantity carrying polling bit is determined based on mapping relation of network configuration and 5QI of sending data.

The receiving terminal V-UE responds to the poling, and the number of the responses is determined based on the mapping relation between the number of the responses to the poling configured by the network and 5QI of the received data.

The transmitting V-UE initiates retransmission of the data every time it receives a NACK, without waiting for all the receiving responses.

Application example II

In this application embodiment, the sending device is a mode 2 type V-UE, the receiving device (also V-UE) is not in RRC connected state (e.g. mode 2 type V-UE), and is in a sidelink multicast scenario.

In this application embodiment, first, a mapping relationship (corresponding relationship) between the number of AMD PDUs carrying a polling bit and 5QI, and a mapping relationship between the number of responses of a receiving end to polling and 5QI, that is, a corresponding relationship between the number of responses and QoS, are configured by a network, and are sent to all V-UEs under a coverage area through system information.

Then, when the transmitting end V-UE needs to transmit a polling request, starting from the AMD PDU with the P field set to 1 which is transmitted last, and transmitting the AMD PDU with the number exceeding that of the POLL PDU, namely PDU_WITHOUT_POLL being larger than or equal to that of the POLL PDU, the transmitting end V-UE carries polling bit in a plurality of continuous AMD PDUs and transmits a plurality of continuous AMD PDUs; wherein, AMD PDU quantity carrying polling bit is determined based on mapping relation of network configuration and 5QI of sending data.

The receiving terminal V-UE responds to the poling, and the number of the responses is determined based on the mapping relation between the number of the responses of the receiving terminal of the network configuration to the poling and 5QI of the received data.

After receiving responses of all receiving terminals, the V-UE at the transmitting terminal starts retransmission of NACK data.

Application example III

The application scenario of the present application embodiment is a Uu unicast scenario.

In this application embodiment, first, a base station configures a mapping relationship (corresponding relationship) between the AMD PDU number "carrying a polling bit and 5QI of a transmitting end device, and sends the mapping relationship to the transmitting end device through RRC dedicated signaling, and configures a mapping relationship between the number of responses of a receiving end device to polling and 5QI, that is, a corresponding relationship between the number of responses and QoS, and sends the mapping relationship to the receiving end device through RRC dedicated signaling.

When the transmitting end equipment needs to transmit a polling request, starting from the latest AMD PDU with the P field set to be 1, and transmitting the AMD PDU with the number exceeding that of the POLL PDU, namely PDU_WITHOUT_POLL being larger than or equal to that of the POLL PDU, the transmitting end equipment carries polling bit in a plurality of continuous AMD PDUs and transmits a plurality of continuous AMD PDUs; wherein, AMD PDU quantity carrying polling bit is determined based on mapping relation of network configuration and 5QI of sending data.

After receiving a polling bit sent by a base station, the receiving terminal equipment responds to polling; the number of responses is determined based on the mapping relation between the number of responses of the configured receiving end to polling and 5QI and the 5QI of the received data.

After the response of the receiving end device, the transmitting end device may retransmit the received NACK data based on the manner in the first embodiment of the application, or may retransmit the received NACK data in the manner in the second embodiment.

Application example IV

The application scenario of the present application embodiment is: and opening some special cases in the communication process, such as a scene that only a few receiving ends do not receive the polling bit and need to retransmit the polling in a sidelink multicast scene.

In this application embodiment, first, a mapping relationship (corresponding relationship) between "the number of AMD PDUs carrying polling bits" and 5QI, and a mapping relationship between the number of responses of a receiving end to polling and 5QI, that is, a corresponding relationship between the number of responses and QoS, are configured by the network, and are sent to a terminal under a coverage area through system information.

When the transmitting end equipment, namely the UE, needs to transmit a polling request, namely from the last AMD PDU with the P field set to 1, the number of the transmitted AMD PDUs exceeds that of the POLL PDU, namely PDU_WITHOUT_POLL is larger than or equal to that of the POLL PDU, and the transmitting end UE carries a polling bit in the AMD PDU.

In this application embodiment, it is assumed that the timer t-poll report expires, and the transmitting UE receives most of the status report responses of the receiving end devices, but does not receive the response of the receiving end Y. Therefore, the scheme of the embodiment of the present invention is started only for the receiving end Y.

Then, the transmitting end UE carries a polling bit in a plurality of continuous AMD PDUs and transmits the plurality of continuous AMD PDUs to the receiving end Y in a targeted manner; and determining the number of the AMD PDUs carrying the polling bit based on the mapping relation between the number of the AMD PDUs carrying the polling bit configured by the system information and 5QI and the 5QI of the transmitted data.

The receiving end Y responds to the poling, and the number of the responses is determined based on the mapping relation between the number of the responses of the receiving end of the network configuration to the poling and 5QI of the received data.

After the response of the receiving end Y, the transmitting end UE may retransmit the received NACK data based on the manner in the first embodiment of the application, or may retransmit the received NACK data in the manner in the second embodiment.

From the above description, it can be seen that, by carrying the polling bit in a plurality of consecutive AMD PDUs, the scheme of the embodiment of the present invention ensures the correct reception probability of the polling bit at the receiving end, thereby avoiding the delay problem caused by the retransmission of the polling request due to the timeout of the t-poll.

In order to implement the method of the embodiment of the present invention, the embodiment of the present invention further provides a data transmission device, which is disposed at a transmitting end device, as shown in fig. 5, and the device includes:

a first determining unit 51, configured to determine the value of N according to a preset rule; n represents the number of PDUs carrying polingbits; n is an integer greater than or equal to 2;

a first transmission unit 52, configured to set a polling bit in each of N consecutive PDUs; n polingbits characterize a polling request; and transmitting the N consecutive PDUs.

In an embodiment, the first determining unit 51 is specifically configured to:

taking the number of network configurations as the value of N;

autonomously determining the value of N;

When the value of N is determined according to the QoS of the transmission data and the corresponding relation between the number of PDUs carrying the polling bit and the QoS, the corresponding relation between the number of PDUs carrying the polling bit and the QoS may be configured by the network side.

Based on this, in an embodiment, the apparatus may further include:

Here, the first receiving unit may receive the corresponding relationship between the number of PDUs carrying the polling bit configured by the network side and QoS through RRC dedicated signaling (such as an RRC connection reconfiguration message) or a system message.

In an embodiment, the first transmission unit 52 is further configured to: and setting the POLL_SN as the SN of the PDU sent by the first one of the N PDUs.

In an embodiment, the first transmission unit 52 is further configured to retransmit the PDU of NACK fed back by one of the following methods:

In practical application, the first determining unit 51 may be implemented by a processor in the data transmission device; the first receiving unit may be implemented by a communication interface in a data transmission device; the first transmission unit may be implemented by a processor in the data transmission device in combination with a communication interface.

In order to implement the method at the receiving end device side in the embodiment of the present invention, the embodiment of the present invention further provides a data transmission device, which is disposed on the receiving end device, as shown in fig. 6, and the device includes:

a second receiving unit 61, configured to receive a PDU sent by the transmitting end device;

a second determining unit 62, configured to determine the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; the polling bit in the N PDU characterizes a polling request;

and a second transmission unit 63, configured to send M responses to the polling request to the sender device.

Wherein, in an embodiment, the second determining unit 62 is specifically configured to:

taking the response quantity of the network configuration as the value of M;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

Here, when determining the value of M according to the QoS of the received data, the correspondence between the number of responses and the QoS may be configured by the network side.

Based on this, in an embodiment, the second receiving unit 61 is further configured to receive a correspondence between the number of responses configured by the network side and QoS.

It should be noted that: in practical application, the second receiving unit 61 and the second transmitting unit 63 may be implemented by a communication interface in the data transmission device; the second determination unit 62 may be implemented by a processor in the data transmission device.

It should be noted that: in the data transmission device provided in the above embodiment, only the division of each program module is used for illustration, and in practical application, the processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the data transmission device and the data transmission method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the data transmission device and the data transmission method are detailed in the method embodiments and are not repeated herein.

Based on the hardware implementation of the program modules, and in order to implement the method on the transmitting end device side in the embodiment of the present invention, the embodiment of the present invention further provides a transmitting end device, as shown in fig. 7, where the transmitting end device 70 includes:

a first communication interface 71 capable of information interaction with a receiving-end device;

the first processor 72 is connected to the first communication interface 71 to implement information interaction with the receiving end device, and is configured to execute the method provided by one or more technical solutions on the transmitting end device side when running the computer program. And the computer program is stored on the first memory 73.

Specifically, the first processor 72 is configured to determine the value of N according to a preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2; and setting a polling bit in each of N continuous PDUs; n polling bits represent a polling request;

the first communication interface 71 is configured to send out the N consecutive PDUs.

In one embodiment, the first processor 72 is specifically configured to:

taking the number of network configurations as the value of N;

Autonomously determining the value of N;

In an embodiment, the first communication interface 71 is further configured to receive a corresponding relationship between the number of PDUs carrying the polling bit configured by the network side and QoS.

In an embodiment, the first processor 72 is further configured to set poll_sn to SN of the PDU sent by the first one of the N PDUs.

In an embodiment, the first processor 72 is further configured to retransmit the PDU of the NACK fed back by one of the following methods:

retransmitting the PDU fed back as NACK through the first communication interface 71 when receiving NACK in the process of receiving all receiving end responses;

after receiving the responses of all the receiving ends, all the PDUs fed back as NACK are retransmitted through the first communication interface 71.

It should be noted that: the specific processing procedures of the first processor 72 and the first communication interface 71 are detailed in the method embodiment, and will not be described herein.

Of course, in practice, the various components in the sender device 70 are coupled together by a bus system 74. It is understood that the bus system 74 is used to enable connected communications between these components. The bus system 74 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled as bus system 74 in fig. 7.

The first memory 73 in the embodiment of the present invention is used to store various types of data to support the operation of the transmitting-end apparatus 70. Examples of such data include: any computer program for operation on the sender device 70.

The method disclosed in the above embodiment of the present invention may be applied to the first processor 72 or implemented by the first processor 72. The first processor 72 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method described above may be performed by instructions in the form of integrated logic circuits or software in hardware in the first processor 72. The first processor 72 described above may be a general purpose processor, a digital signal processor (DSP, digital Signal Processor), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The first processor 72 may implement or perform the methods, steps and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the decoding processor or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the first memory 73, and the first processor 72 reads information in the first memory 73, in combination with its hardware, to perform the steps of the method as described above.

In an exemplary embodiment, the sender device 70 may be implemented by one or more application specific integrated circuits (ASIC, application Specific Integrated Circuit), DSPs, programmable logic devices (PLD, programmable Logic Device), complex programmable logic devices (CPLD, complex Programmable Logic Device), field-programmable gate arrays (FPGA, field-Programmable Gate Array), general purpose processors, controllers, microcontrollers (MCU, micro Controller Unit), microprocessors (Microprocessor), or other electronic components for performing the aforementioned methods.

Based on the hardware implementation of the program modules, and in order to implement the method on the receiving device side in the embodiment of the present invention, as shown in fig. 8, the receiving device 80 includes:

a second communication interface 81 capable of information interaction with the first node;

and the second processor 82 is connected with the second communication interface 81 to realize information interaction with the sending end device, and is used for executing the method provided by one or more technical schemes on the receiving end device side when running the computer program. And the computer program is stored on the second memory 83.

Specifically, the second communication interface 81 is configured to receive a PDU sent by the sender device; and sending M responses to the polling request to the sender device;

The second processor 82 is configured to determine the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; the polling bit in the N PDUs characterizes a poll request.

Wherein, in an embodiment, the second processor 82 is specifically configured to:

taking the response quantity of the network configuration as the value of M;

autonomously determining the value of M;

the value of M is determined through negotiation with the sender device.

In an embodiment, the second communication interface 81 is further configured to receive a correspondence between the number of responses configured by the network side and QoS.

It should be noted that: the specific processing procedures of the second processor 82 and the second communication interface 81 are described in the method embodiment, and are not described herein.

Of course, in practice, the various components in the sink device 80 are coupled together by a bus system 84. It is understood that the bus system 84 is used to enable connected communications between these components. The bus system 84 includes a power bus, a control bus, and a status signal bus in addition to the data bus. But for clarity of illustration the various buses are labeled as bus system 84 in fig. 8.

The second memory 83 in the embodiment of the present invention is used to store various types of data to support the operation of the sink device 80. Examples of such data include: any computer program for operation on the receiving end device 80.

The method disclosed in the above embodiment of the present invention may be applied to the second processor 82 or implemented by the second processor 82. The second processor 82 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method described above may be performed by instructions in the form of integrated logic circuits or software in hardware in the second processor 82. The second processor 82 may be a general purpose processor, DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The second processor 82 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiment of the invention can be directly embodied in the hardware of the 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 83, said second processor 82 reading information in the second memory 83, in combination with its hardware performing the steps of the method as described above.

In an exemplary embodiment, the receiver-side device 80 may be implemented by one or more ASIC, DSP, PLD, CPLD, FPGA, general-purpose processors, controllers, MCU, microprocessor, or other electronic elements for performing the foregoing methods.

It is to be understood that the memories (the first memory 73, the second memory 83) of the embodiment of the present invention may be volatile memories or nonvolatile memories, and may include both volatile and nonvolatile memories. Wherein the nonvolatile Memory may be Read Only Memory (ROM), programmable Read Only Memory (PROM, programmable Read-Only Memory), erasable programmable Read Only Memory (EPROM, erasable Programmable Read-Only Memory), electrically erasable programmable Read Only Memory (EEPROM, electrically Erasable Programmable Read-Only Memory), magnetic random access Memory (FRAM, ferromagnetic random access Memory), flash Memory (Flash Memory), magnetic surface Memory, optical disk, or compact disk Read Only Memory (CD-ROM, compact Disc Read-Only Memory); the magnetic surface memory may be a disk memory or a tape memory. The volatile memory may be random access memory (RAM, random Access Memory), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (SRAM, static Random Access Memory), synchronous static random access memory (SSRAM, synchronous Static Random Access Memory), dynamic random access memory (DRAM, dynamic Random Access Memory), synchronous dynamic random access memory (SDRAM, synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (ddr SDRAM, double Data Rate Synchronous Dynamic Random Access Memory), enhanced synchronous dynamic random access memory (ESDRAM, enhanced Synchronous Dynamic Random Access Memory), synchronous link dynamic random access memory (SLDRAM, syncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, direct Rambus Random Access Memory). The memory described by 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 of the embodiment of the present invention, the embodiment of the present invention further provides a data transmission system, as shown in fig. 9, where the system includes:

a transmitting end device 91, configured to determine the value of N according to a preset rule; n represents the number of PDUs carrying polling bits; n is an integer greater than or equal to 2; setting polling bit in N continuous PDU; and transmitting the N continuous PDUs; n polling bits represent a polling request;

a receiving end device 92 for receiving the PDU transmitted by the transmitting end device 91; determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling bit sent by the sender device; m is an integer greater than or equal to 1; m responses to the polling request are sent to the sending terminal equipment.

It should be noted that: specific processing procedures of the transmitting-end device 91 and the receiving-end device 92 are described in detail above, and will not be described here again.

In an exemplary embodiment, the present invention further provides a storage medium, i.e. a computer storage medium, in particular a computer readable storage medium, for example comprising a first memory 73 storing a computer program executable by the first processor 72 of the sender device 70 to perform the steps of the aforementioned sender device side method. For example, the second memory 83 stores a computer program executable by the second processor 82 of the receiving end device 80 to perform the steps of the receiving end device-side method described above. The computer readable storage medium may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

It should be noted that: "first," "second," etc. are used to distinguish similar objects and not necessarily to describe a particular order or sequence.

In addition, the embodiments of the present invention may be arbitrarily combined without any collision.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A data transmission method, applied to a transmitting device, comprising:

determining the value of N according to a preset rule; n represents the number of protocol data units PDU carrying a polling flag bit; n is an integer greater than or equal to 2;

setting polling flag bits in N continuous PDUs; n polling flags represent a polling request;

emitting the N continuous PDUs; wherein,,

the determining the value of N according to the preset rule comprises the following steps:

determining the value of N according to the QoS of the transmitted data and the corresponding relation between the PDU number carrying the polling zone bit and the QoS;

the method further comprises the steps of: and receiving the corresponding relation between the PDU quantity carrying the polling zone bit and QoS configured by the network side.

2. The method of claim 1, wherein the receiving the corresponding relationship between the number of PDUs carrying the poll flag bit and QoS configured by the network side includes:

And receiving the corresponding relation between the PDU number carrying the polling zone bit and QoS configured by the network side through the Radio Resource Control (RRC) dedicated signaling or system message.

3. The method of claim 1, wherein the QoS is at least one of:

5G QoS flag 5QI;

V2X QoS flags VQI;

a 5QI value PQI on the PC5 interface;

near field communication data packet priority PPPP;

near field communication data packet reliability PPPR.

4. The method of claim 1, wherein when the poll flag bit is set, the method further comprises:

the POLL SN is set to the sequence number SN of the first transmitted PDU of the N consecutive PDUs.

5. The method according to any one of claims 1 to 4, further comprising:

6. A data transmission method, applied to a receiving end device, comprising:

receiving a PDU sent by a sending terminal device;

Determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling zone bits sent by the sender device; m is an integer greater than or equal to 1; the poll flag bits in N consecutive PDUs characterize a poll request;

m responses to the polling request are sent to the sending terminal equipment; wherein,,

the determining the value of M according to the preset rule comprises the following steps:

the method further comprises the steps of: and receiving the corresponding relation between the response quantity configured by the network side and QoS.

7. The method of claim 6, wherein the correspondence between the number of responses configured by the receiving network side and QoS includes:

RRC dedicated signaling;

a system message;

PC5 interface messages.

8. The method of claim 6, wherein the QoS is at least one of:

5QI；

VQI；

PQI；

PPPP；

PPPR。

9. a data transmission apparatus, comprising:

the first determining unit is used for determining the value of N according to a preset rule; n represents the number of PDUs carrying the polling flag bit; n is an integer greater than or equal to 2;

The first transmission unit is used for setting polling flag bits in N continuous PDUs; n polling flags represent a polling request; and transmitting the N continuous PDUs; wherein,,

the first determining unit is specifically configured to:

determining the value of N according to the QoS of the transmitted data and the corresponding relation between the number of PDU carrying the polling bit and the QoS;

the apparatus further comprises: the first receiving unit is configured to receive a corresponding relationship between the number of PDUs carrying the poll flag bit and QoS configured by the network side.

10. The apparatus of claim 9, wherein the first transmission unit is further configured to: the POLL SN is set to the SN of the first transmitted PDU of the N consecutive PDUs.

11. The apparatus according to any of claims 9 or 10, wherein the first transmission unit is further configured to retransmit the PDU of the feedback NACK by one of:

12. A data transmission apparatus, comprising:

the second determining unit is used for determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling zone bits sent by the sender device; m is an integer greater than or equal to 1; the poll flag bits in N consecutive PDUs characterize a poll request;

a second transmission unit, configured to send M responses to the polling request to the sender device,

the second determining unit is specifically configured to:

the second receiving unit is further configured to receive a correspondence between the response number configured by the network side and QoS.

13. A transmitting-end apparatus, characterized by comprising:

the first processor is used for determining the value of N according to a preset rule; n represents the number of PDUs carrying the polling flag bit; n is an integer greater than or equal to 2; setting polling flag bits in N continuous PDUs; n polling flags represent a polling request;

a first communication interface for transmitting the N consecutive PDUs; wherein,,

the first processor is specifically configured to:

the first communication interface is further configured to receive a corresponding relationship between the number of PDUs carrying the poll flag bit and QoS configured by the network side.

14. The apparatus of claim 13, wherein the first processor is further configured to set POLL SN to the SN of the first transmitted PDU of the N consecutive PDUs.

15. The apparatus according to any of claims 13 or 14, wherein the first processor is further configured to retransmit the returned NACK PDU by one of:

16. A receiving-end apparatus, characterized by comprising:

the second communication interface is used for receiving the PDU sent by the sending terminal equipment; m responses to the polling request are sent to the sending end equipment;

the second processor is used for determining the value of M according to a preset rule; m represents the response quantity of N continuous PDU carrying polling zone bits sent by the sender device; m is an integer greater than or equal to 1; the poll flag bits in N consecutive PDUs characterize a poll request; wherein,,

The second processor is specifically configured to:

the second communication interface is further configured to receive a corresponding relationship between the response number configured by the network side and QoS.

17. A transmitting-end apparatus, characterized by 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 of claims 1 to 5 when the computer program is run.

18. A receiving-end apparatus, characterized by 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 8 when the computer program is run.

19. A storage medium having stored thereon a computer program, which when executed by a processor, performs the steps of the method of any of claims 1 to 5 or performs the steps of the method of any of claims 6 to 8.