CN111464269A

CN111464269A - Method and equipment for repeating transmission confirmation

Info

Publication number: CN111464269A
Application number: CN201910048926.0A
Authority: CN
Inventors: 刘佳敏
Original assignee: Telecommunications Science and Technology Research Institute Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2020-07-28
Anticipated expiration: 2039-01-18
Also published as: CN111464269B

Abstract

The embodiment of the invention discloses a method and equipment for confirming repeated transmission, which are used for solving the problem of redundant transmission resource waste caused by long feedback time delay in the repeated transmission confirmation in the prior art, wherein a first target layer determines a second target layer to activate a quick feedback mechanism, wherein the first target layer and the second target layer are PDCP layers or the first target layer and the second target layer are R L C layers, the first target layer determines a data packet successfully sent to the second target layer according to received confirmation information for the data packet fed back by the second target layer, and the first target layer determines the data packet successfully transmitted according to the received confirmation information.

Description

Method and equipment for repeating transmission confirmation

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for repeatedly transmitting acknowledgements.

Background

In order to support the low-delay and high-reliability service transmission requirement, a repeated transmission mechanism is introduced into a 5G NR (New Radio, New air interface), and in order to meet the extremely high service requirement, a three-leg repeated transmission mechanism is introduced.

When data transmission is performed by an existing terminal and a network side device, the data transmission is generally performed through PDCP (Packet data convergence Protocol), R L C (Radio L ink Control ), MAC (Medium Access Control) and PHY (Physical layer), specifically as shown in fig. 1, which is a schematic diagram of a User-plane Protocol stack (User-plane Protocol stack) in the prior art, and different data processing is performed in each layer during data transmission, PDCP mainly performs security operation and Header Compression and decompression processing, such as encryption and integrity protection, ROHC (RObust Header Compression) Compression and decompression, R L C mainly performs segmentation and sequential concatenation of data and ARQ (Automatic Repeat Request, Automatic Request) data transmission, and MAC mainly performs scheduling and guarantee channel scheduling and HARQ (hybrid Automatic Repeat Request, HARQ) Packet transmission.

In the dual-connection architecture, the user data may be split between different network-side devices, and the two network-side devices are processed separately from R L C and below, specifically, as shown in fig. 2, which is a schematic diagram of a radio protocol architecture of the dual-connection in the prior art.

At the NR Rel-15 stage, two-way retransmission is supported, that is, a PDCP entity corresponding to one radio bearer is mapped to two R L C, specifically, one radio bearer of the PDCP layer, and is transmitted through multiple logical channels in the R L C layer, as shown in fig. 3, a retransmission model in 5G and a schematic diagram of a CA (Carrier Aggregation) model are shown, where multiple logical channels corresponding to a retransmission radio bearer are processed by one MAC entity in the MAC layer, and data from different R L C logical channels are mapped to one or multiple carriers for transmission, as shown in fig. 4, another retransmission model in 5G and a schematic diagram of a DC (Dual Carrier) model are shown, where multiple logical channels corresponding to a radio bearer are mapped to different MAC entities, and data of different R L C logical channels are mapped to different carriers for transmission.

In the prior art, a feedback mechanism of an R L C layer AM (Acknowledged Mode) is achieved, the AM has complex triggering and can feed back after waiting for a rearrangement timer to time out, and not only the successful data packet but also the failed data packet are fed back during the feedback, so that the feedback process is long, the successfully sent data packet cannot be confirmed in time, the successfully transmitted data packet on one path is further transmitted on the other path again, and the resource waste is caused by redundant transmission.

In summary, in the prior art, when the acknowledgement is repeatedly transmitted, a feedback mechanism of the R L C layer AM itself is used, so that the feedback delay is long, and resource waste and redundant transmission are caused.

Disclosure of Invention

The invention provides a method and equipment for repeated transmission confirmation, which are used for solving the problems of resource waste and redundant transmission caused by long feedback time delay due to the fact that the prior art depends on a feedback mechanism of an R L C layer AM when repeated transmission confirmation is carried out.

In a first aspect, an embodiment of the present invention provides a method for repeatedly transmitting an acknowledgement, where the method includes:

determining, by a first target layer, that a second target layer activates a fast feedback mechanism, wherein the first target layer and the second target layer are PDCP layers, or the first target layer and the second target layer are R L C layers;

and the first target layer determines the data packet successfully sent to the second target layer according to the received confirmation information for the data packet fed back by the second target layer.

According to the method, the first target layer determines that the second target layer activates a fast feedback mechanism, receives acknowledgement information for the data packet fed back by the second target layer, and determines the data packet successfully sent to the second target layer according to the acknowledgement information for the data packet fed back by the second target layer.

In a possible implementation manner, a first RRC (Radio Resource Control) layer notifies the first target layer to turn on or off the fast feedback mechanism; and/or

The first MAC layer informs the first target layer to activate or deactivate the fast feedback mechanism.

In a possible implementation manner, after the first target layer determines that the second target layer activates the fast feedback mechanism, the first target layer sends, to the second target layer, a search instruction for notifying whether fast feedback is required or not before determining that a data packet is successfully sent to the second target layer according to received acknowledgement information for the data packet fed back by the second target layer.

In the method, after the first target layer determines that the second target layer activates the fast feedback mechanism, before determining that the data packet is successfully sent to the second target layer according to the received confirmation information for the data packet fed back by the second target layer, the first target layer sends a search indication for notifying whether fast feedback is needed to the second target layer, so that after the second target layer receives the search indication, the confirmation information for the data packet is fed back to the first target layer, feedback can be performed without obtaining repeated transmission timeout, and the second target layer feeds back the confirmation information for the data packet to the first target layer more timely.

In a possible implementation manner, when the first target layer sends a search instruction for notifying whether fast feedback is required to be performed to the second target layer:

after the first target layer sends N data packets every time, adding the search indication into the last data packet in the N data packets, and sending the data packets to the second target layer; or

After the period of the first target layer is reached, adding the search indication into a data packet which needs to be sent currently, and sending the data packet to the second target layer;

the first target layer is M per transmission₁In each MAC PDU (Medium Access Control Protocol data Unit) or every M₂Adding the search instruction into the last complete R L C PDU (Radio L ink Control Protocol Data Unit) or PDCP PDU (Packet Data Convergence Protocol Data Unit) at the end of TTI (Transmission Time Interval) and transmitting the search instruction to the second target layer;

wherein, the N, M₁、M₂Is a positive integer.

The method gives when the first target layer sends the search instruction to the second target layer, and gives how to send the search instruction to the second target layer.

In a possible implementation manner, when the first target layer determines, according to the received acknowledgement information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer:

if the format of the acknowledgement information is ACK _ SN + bitmap (acknowledgement _ Sequence Number, Sequence Number of correct response instruction), the first target layer takes a data packet corresponding to ACK _ SN as a first data packet successfully transmitted, and determines a data packet successfully transmitted after the first data packet according to a numerical value of each bit in bitmap; or

If the format of the acknowledgement information is ACK _ SN + bitmap, the first target layer takes a data packet corresponding to the ACK _ SN as a last data packet which is successfully transmitted, and determines the data packet which is successfully transmitted before the last data packet according to the value of each bit in the bitmap; or

If the format of the acknowledgement information is ACK _ SN + SN _ Range, the first target layer takes a data packet corresponding to ACK _ SN as a successfully transmitted data packet, and takes SN _ Range data packets that are continuously and successfully transmitted after the successfully transmitted data packet as successfully transmitted data packets; or

If the format of the acknowledgment information is ACK _ SN + NACK _ SN + SN _ Range, the first target layer uses ACK _ SN as the last successfully transmitted data packet, uses a data packet corresponding to NACK _ SN (Negative acknowledgement _ Sequence Number, error response command Sequence Number) as the unsuccessfully transmitted data packet before the last successfully transmitted data packet, and uses data packets other than the SN _ Range data packets that are continuously unsuccessfully transmitted after the unsuccessfully transmitted data packet as the successfully transmitted data packets.

In the method, four formats of the acknowledgement information are provided, and how the first target layer determines the data packet successfully sent to the second target layer according to the acknowledgement information in each format, because the first target layer only needs to determine the data packet successfully sent to the second target layer according to the acknowledgement information, the first target layer can rapidly determine the data packet successfully sent to the second target layer.

In a possible implementation manner, after the first target layer determines, according to the received acknowledgement information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer:

if the first target layer is a PDCP layer, the first target layer informs at least one R L C layer connected with the first target layer to abandon the transmission of the data packet which is successfully sent according to the received confirmation information, or

And if the first target layer is the R L C layer, the first target layer informs the connected PDCP layers to abandon the transmission of the data packets which are successfully transmitted according to the received confirmation information, and the PDCP layers inform at least one R L C layer connected with the PDCP layers to abandon the transmission of the data packets which are successfully transmitted.

In the method, after the first target layer determines that the data packet is successfully sent to the second target layer, the first target layer sends the data packet which is sent successfully and abandoned to be transmitted to other transmission paths, so that redundant transmission is prevented, and resources are saved.

In a second aspect, an embodiment of the present invention provides a method for repeatedly transmitting an acknowledgement, where the method includes:

the second target layer activates a fast feedback mechanism;

the second target layer feeds back confirmation information aiming at the data packet to the first target layer;

wherein the first target layer and the second target layer are PDCP layers, or the first target layer and the second target layer are R L C layers.

In the method, the second target layer activates a fast feedback mechanism and feeds back acknowledgement information for the data packet to the first target layer, so that the first target determines the successfully transmitted data packet according to the acknowledgement information, and the first target layer sends the data packet which is abandoned to be transmitted successfully to other paths in the repeated transmission according to the successfully transmitted data packet, thereby preventing redundant transmission and saving resources.

In a possible implementation manner, the second RRC layer notifies that the second target layer is determined to turn on or off the fast feedback mechanism; and/or

A second MAC layer notification determines that the second target layer activates or deactivates the fast feedback mechanism.

The method for determining how to turn on or turn off the fast feedback mechanism and how to activate or deactivate the fast feedback mechanism in the device by the second target layer is provided.

In a possible implementation manner, after the second target layer activates the fast feedback mechanism, before the second target layer feeds back the acknowledgement information for the data packet to the first target layer, the second target layer receives a search indication that is sent by the first target layer and used for notifying whether fast feedback is required.

In a possible implementation manner, when the second target layer receives a search instruction sent by the first target layer to notify whether fast feedback is required:

the second target layer determines the search indication for notifying whether fast feedback needs to be performed according to the last data packet of every N data packets sent by the first target layer; or

The second target layer determines the search indication for informing whether fast feedback is needed or not according to the data packet which is needed to be sent at present after the first target layer period is reached; or

The second target layer sends M per transmission according to the first target layer₁In one MAC PDU or per M₂Determining the probing indication for notifying whether fast feedback is needed or not by the last complete R L C PDU or PDCP PDU at the end of one TTI;

after the second target layer receives the search instruction sent by the sending device for notifying whether fast feedback is needed, the second target layer determines whether to feed back confirmation information to the first target layer according to the received search instruction for notifying whether fast feedback is needed.

In the method, after activating the fast feedback mechanism, the second target layer receives the seek indication sent by the first target layer before feeding back the acknowledgement information for the data packet to the first target layer, and specifically gives how to receive the seek indication sent by the first target layer, and after receiving the seek indication, the second target layer feeds back the acknowledgement information for the data packet to the first target layer without waiting for the reordering timer to time out, so that the second target layer can feed back the acknowledgement information for the data packet to the first target layer more timely.

In a possible implementation manner, when the second target layer feeds back the acknowledgement information for the data packet to the first target layer:

after the second target layer receives N data packets every time, feeding back the confirmation information to the first target layer; or

After the period of the second target layer is reached, feeding back the confirmation information to the first target layer; or

The second target layer is at every M₁In one MAC PDU or per M₂Feeding back the confirmation information to the first target layer at the end of each TTI;

wherein, the N, M₁、M₂Is a positive integer.

In the method, the second target layer determines when to feed back the acknowledgement information to the first target layer, and does not need to wait until the reordering timer is overtime, so that the second target layer can feed back the acknowledgement information for the data packet to the first target layer more timely.

In one possible implementation, the second target layer determines the confirmation information by:

if the format of the acknowledgement information is ACK _ SN + bitmap, the second target layer takes the SN of the successfully transmitted first data packet as ACK _ SN, and generates bitmap according to the successfully transmitted data packet after the first data packet; or

If the format of the acknowledgement information is ACK _ SN + bitmap, the second target layer takes the SN of the last successfully transmitted data packet as ACK _ SN, and generates bitmap according to the successfully transmitted data packet before the last data packet; or

If the format of the acknowledgement information is ACK _ SN + SN _ Range, the second target layer takes the SN of the successfully transmitted data packet as ACK _ SN, and takes the number of data packets that are continuously and successfully transmitted after the successfully transmitted data packet as SN _ Range; or

If the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, the second target layer uses the SN of the last successfully transmitted data packet as ACK _ SN, uses the SN of the unsuccessfully transmitted data packet before the last successfully transmitted data packet as NACK _ SN, and uses the number of consecutive unsuccessfully transmitted data after the unsuccessfully transmitted data packet as SN _ Range.

The method gives the format of the confirmation information fed back to the first target layer by the second target layer, and how the second target layer determines the second target format and the meaning of each part in the format.

In a third aspect, an embodiment of the present invention provides an apparatus for repeatedly transmitting an acknowledgement, where the apparatus includes: a processor, a memory, and a transceiver;

wherein the processor is configured to read the slave program in the memory and execute:

after a first target layer determines that a second target layer activates a fast feedback mechanism, determining, by the first target layer, a data packet successfully sent to the second target layer according to received confirmation information for the data packet fed back by the second target layer;

In a fourth aspect, an embodiment of the present invention provides an apparatus for repeatedly transmitting an acknowledgement, where the apparatus includes: a processor, a memory, and a transceiver;

wherein the processor is configured to read a program in the memory and execute:

activating a fast feedback mechanism through a second target layer;

feeding back confirmation information aiming at the data packet to the first target layer through the second target layer;

In a fifth aspect, an embodiment of the present invention provides an apparatus for repeatedly transmitting an acknowledgement, where the apparatus includes:

the first determining module is used for determining that the second target layer activates the rapid feedback mechanism through the first target layer;

a second determining module, configured to determine, by the first target layer, a data packet successfully sent to the second target layer according to the received acknowledgement information for the data packet fed back by the second target layer;

In a sixth aspect, an embodiment of the present invention provides an apparatus for repeatedly transmitting an acknowledgement, where the apparatus includes:

the activation module is used for activating the quick feedback mechanism through the second target layer;

the feedback module is used for feeding back confirmation information aiming at the data packet to the first target layer through the second target layer;

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the step of repeating any one of the transmission acknowledgements.

In addition, for technical effects brought by any one implementation manner of the third aspect to the seventh aspect, reference may be made to technical effects brought by different implementation manners of the first aspect and the second aspect, and details are not described here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of a prior art user-plane protocol stack;

FIG. 2 is a diagram of a dual connectivity radio protocol architecture in the prior art;

FIG. 3 is a prior art CA retransmission model;

FIG. 4 is a prior art DC repetitive transmission model;

fig. 5 is a schematic structural diagram of a system for duplicate acknowledgement according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first apparatus for duplicate transmission acknowledgement according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second apparatus for duplicate transmission acknowledgement according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a third apparatus for repeatedly transmitting an acknowledgement according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a fourth apparatus for repeatedly transmitting an acknowledgement according to an embodiment of the present invention;

fig. 10 is a flowchart of a first method for repeatedly transmitting acknowledgments according to an embodiment of the present invention;

fig. 11 is a flowchart of a second method for repeatedly transmitting an acknowledgement according to an embodiment of the present invention.

Detailed Description

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

(1) In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.

(2) In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In order to support the requirement of low-delay and high-reliability service transmission, a repeated transmission mechanism is introduced into the 5G NR; subsequently, for higher service requirements, a three-leg repeated transmission mechanism is introduced, after repeated transmission is started, the receiving device feeds back the transmission condition of the data packet in the repeated transmission process to the sending device, the sending device is taken as a network side device, and the receiving device is taken as a terminal for example;

after the repeated transmission mechanism is started, the network side equipment sends a data packet, and after the terminal receives the data packet sent by the network side equipment, the terminal feeds back the transmission condition of the data packet to the network side equipment through a feedback mechanism of an R L C layer AM, because the trigger of the state report feedback mechanism of the AM is complex, and the transmission condition of all data transmission needs to be fed back during feedback, the time delay of the whole feedback is long, so that the network side equipment cannot confirm the successfully transmitted data packet in time, and even if the successfully transmitted data packet is transmitted on one path, the data can still be transmitted on other paths, thereby causing the resource waste of redundant transmission.

Based on the above, an embodiment of the present invention provides a method for repeatedly transmitting acknowledgements, where a first target layer determines that a second target layer activates a fast transmission mechanism, and the first target layer determines, according to acknowledgement information for a data packet that is received and fed back by the second target layer, a successfully transmitted data packet, and only the successfully transmitted data packet needs to be determined in this process, and the feedback time is short and relatively fast.

The terminal is a device with a wireless communication function, can be deployed on land, and comprises an indoor or outdoor terminal, a handheld terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc.; but also UEs in various forms, Mobile Stations (MSs), the terminal equipment (terminal device).

The network side device is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a BaseBand Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center (msc), and the like.

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention with each creative effort belong to the protection scope of the present invention.

In view of the foregoing scenario, an embodiment of the present invention provides a schematic structural diagram of a system for repeatedly transmitting acknowledgements, and as shown in fig. 5, the system includes: a transmitting device 500 and a receiving device 510;

the sending device 500 is configured to send a data packet, receive acknowledgement information for the data packet fed back by the receiving device, and determine a successfully transmitted data packet according to the received acknowledgement information;

the receiving device 510 is configured to receive a data packet sent by a sending device, and feed back acknowledgement information for the data packet to the sending device.

The sending device comprises a first target layer (PDCP layer and R L C layer), a first RRC layer and a first MAC layer, and the receiving device comprises a second target layer (PDCP layer and R L C layer), a second RRC layer and a second MAC layer.

It should be noted that the sending device may be a network side device or a terminal; correspondingly, the receiving device may be a network side device or a terminal; if the sending equipment is network side equipment, the receiving equipment is a terminal; or if the sending device is a terminal, the receiving device is a network side device.

In the embodiment of the present invention, the repeated transmission confirmation process is mainly performed in the first target layer of the sending device and the second target layer of the receiving device, specifically:

the first target layer determines that the second target layer activates a quick feedback mechanism; the first target layer determines a data packet successfully sent to the second target layer according to the received confirmation information for the data packet fed back by the second target layer;

the second target layer activates a fast feedback mechanism; the second target layer feeds back confirmation information aiming at the data packet to the first target layer;

Before the second target layer activates the fast feedback mechanism, it is necessary to configure a fast feedback mechanism to be turned on or off for the second target layer (i.e. whether the second target layer supports the fast feedback mechanism); and/or instructions to configure activation or deactivation of the fast feedback mechanism;

when the rapid feedback mechanism is configured to be started or closed and/or the rapid feedback mechanism is configured to be activated or deactivated, the network side equipment executes configuration; because the network side device in the embodiment of the present invention may serve as a sending device and may also serve as a receiving device, when the network side device serves as a sending device, the network side device configures the terminal to turn on or turn off the fast feedback mechanism, and/or configures the terminal to activate or deactivate the fast feedback mechanism; or when the network side equipment is the receiving equipment, the network side equipment configures; the following description will be made with respect to a case where the network side device is a transmitting device and a case where the network side device is a receiving device.

The first condition is as follows: the sending device is a network side device, and the receiving device is a terminal.

Optionally, the first target layer is located in a network side device, that is, the sending device is a network side device;

a first RRC layer in the network side equipment informs the second target layer of opening or closing the rapid feedback mechanism through a second RRC layer; and/or

And the first MAC layer in the network side equipment informs the second target layer of activating or deactivating the quick feedback mechanism through the second MAC layer.

Correspondingly, the second target layer is located at a terminal, that is, the receiving device is a terminal;

the second RRC layer of the terminal determines the second target layer to open or close the rapid feedback mechanism according to the notification of the first RRC layer; and/or

And the second MAC layer of the terminal determines that the second target layer activates or deactivates the quick feedback mechanism according to the notification of the first MAC layer.

Further, the second RRC layer notifies the second target layer to turn on or off the fast feedback mechanism; and/or

The second MAC layer informs the second target layer to activate or deactivate the fast feedback mechanism.

Specifically, the configuration of the fast feedback mechanism for turning on or off is illustrated as follows:

the network side equipment sends configuration information for opening or closing a fast feedback mechanism to a second RRC layer through a first RRC layer;

correspondingly, after receiving the configuration information for starting or closing the fast feedback mechanism, the second RRC layer notifies the second target layer to start or close the fast feedback mechanism according to the configuration information, so that the second target layer determines to activate or deactivate the fast feedback mechanism according to the notification of the second RRC layer.

For example, the network side device sends configuration information for starting the fast feedback mechanism to the second RRC layer of the terminal through the first RRC layer, and after receiving the configuration information for starting the fast feedback mechanism, the second RRC layer of the terminal sends the configuration information for starting the fast feedback mechanism to the second target layer (PDCP layer/R L C layer), where the second target layer determines to start the fast feedback mechanism.

Specifically, the configuration activation or deactivation fast feedback mechanism is exemplified as follows:

the network side equipment sends configuration information for starting or closing the rapid feedback mechanism to a second MAC layer through a first MAC layer;

correspondingly, after receiving the configuration information for starting or closing the fast feedback mechanism, the second MAC layer notifies the second target layer to start or close the fast feedback mechanism according to the configuration information, so that the second target layer determines to activate or deactivate the fast feedback mechanism according to the notification of the second RRC.

For example, the network side device sends configuration information for activating the fast feedback mechanism to the second MAC layer of the terminal through the first MAC layer, and after receiving the configuration information for starting the fast feedback mechanism, the second MAC layer of the terminal sends the configuration information for activating the fast feedback mechanism to the second target layer (PDCP layer/R L C layer), so that the second target layer activates the fast feedback mechanism.

Case two: the sending device is a terminal, and the receiving device is a network side device.

When the receiving equipment is network side equipment, the network side equipment configures a quick feedback mechanism to be started or closed and/or configures an activated or deactivated quick feedback mechanism;

optionally, the second target layer is located in a network side device, that is, the receiving device is a network side device;

the second RRC layer informs the second target layer to start or close a fast feedback mechanism; and/or

Further, the second target layer notifies, through a second RRC layer, to determine that the second target layer turns on or off the fast feedback mechanism; and/or

The second target layer determines that the second target layer activates or deactivates the fast feedback mechanism through a second MAC layer notification.

It should be noted that, after configuring the fast feedback mechanism for turning on/off, the activation or deactivation of the fast feedback mechanism needs to be configured; however, for the SRB (signaling Radio Bearer), after the fast feedback mechanism for opening/closing is configured, there is no need to continuously configure the activation or deactivation of the fast feedback mechanism, that is, for the SRB, the quick feedback mechanism for opening is the activation of the fast feedback mechanism.

The fast feedback mechanism in the repeat transmission confirmation process provided by the embodiment of the invention is mainly used for the situation of start of repeat transmission, so that when the fast feedback mechanism is configured to be started or closed, a switch of the fast feedback mechanism and a function switch of the repeat transmission can be placed together, namely the fast feedback mechanism is determined to be supported when the function of the repeat transmission is determined to be triggered.

When a second target layer starts or closes the rapid feedback mechanism and/or activates or deactivates the rapid feedback mechanism, the first target layer is informed of the second target layer starting or closing the rapid feedback mechanism and/or activates or deactivates the rapid feedback mechanism;

correspondingly, the first target layer determines that the second target layer starts or closes the rapid feedback mechanism, and/or activates or deactivates the rapid feedback mechanism;

optionally, the first target layer determines, according to the notification of the first RRC layer, that the second target layer opens or closes the fast feedback mechanism; and/or

And the first target layer determines that the second target layer activates or deactivates the fast feedback mechanism according to the notification of the first MAC layer.

Specifically, the second target layer starts the fast feedback mechanism, and the second RRC layer notifies the second target layer to start or close the fast feedback mechanism through the first RRC layer; and/or the second target layer activates or deactivates the fast feedback mechanism, and the second MAC layer notifies the second target layer through the first MAC layer to activate or deactivate the fast feedback mechanism;

further, the second target layer received by the first RRC layer turns on or off the fast feedback mechanism and notifies the first target layer, and/or the second target layer received by the first MAC layer activates or deactivates the fast feedback mechanism and notifies the first target layer.

In implementation, the first target layer determines that the second target layer starts or closes the fast feedback mechanism, and/or activates or deactivates the fast feedback mechanism, so that the first target layer performs corresponding processing when receiving the confirmation information fed back by the second target layer.

Configuring the fast feedback mechanism to be turned on or off; and/or when activating and deactivating the fast feedback mechanism, configuring not only the receiving device but also the sending device, specifically, the first RRC layer notifies the first target layer to turn on or turn off the fast feedback mechanism; and/or

After the second target layer activates the fast feedback mechanism, the second target layer feeds back confirmation information to the first target layer;

in this embodiment of the present invention, the second target layer may actively feed back the acknowledgement information to the first target layer, and the second target layer may also feed back the acknowledgement information to the first target layer after receiving the trigger instruction sent by the first target layer, where the following specifically and respectively refer to:

the first condition is as follows: and the second target layer actively feeds back confirmation information to the first target layer.

Triggering a feedback condition one: after the second target layer receives N data packets every time, feeding back the confirmation information to the first target layer, wherein N is a positive integer;

specifically, determining when to feed back the acknowledgement information based on the number of the data packets; for example, from the time of activating the repeated transmission, after receiving N data packets, feeding back acknowledgement information for the data packets to the first target layer, where if N is 3, then receiving 3 data packets, and feeding back acknowledgement information for the data packets to the first target layer; or

And if each data packet is continuously received (namely, if gap exists in the middle), determining to feed back confirmation information aiming at the data packet to the first target layer according to the updating of the received PDCP SN, and feeding back the confirmation information aiming at the data packet to the first target layer every N PDCP SNs.

The number N of the data packets may be configured by RRC.

Triggering a feedback condition II: after the period of the second target layer is reached, feeding back confirmation information to the first target layer;

specifically, determining when to perform feedback of the confirmation information based on the duration; for example, from the time when the retransmission is activated, feedback of the acknowledgment information to the first target layer is performed every time T duration (the T duration is one cycle) according to the state of the currently received data packet.

Wherein the periodicity may be configured by RRC.

Triggering a feedback condition III: the second target layer is at M₁In one MAC PDU or per M₂Feeding back the acknowledgement information to the first target layer at the end of one TTI, where M₁、M₂Is a positive integer;

in particular, on a per M basis₁One MAC PDU or every M₂At the end of each TTI, feeding back confirmation information aiming at the data packet to the first target layer according to the state of the received data packet;

wherein M is₁And M₂Can be configured by RRC, and can also be 1. When M is₁And M₂When the value is 1, the feedback of the acknowledgement information of the data packet to the first target layer is carried out on all complete R L C PDUs or PDCP PDUs in the MAC PDU or the TTI ending position every time the MAC PDU or the TTI ending position is received, and when M is used₁And M₂When the value is 1, the second target layer feeds back to the first target layer most timely, and the first target layer is more favorable for confirming the transmission condition of the data packet.

Case two: and the second target layer feeds back confirmation information to the first target layer after receiving the trigger instruction sent by the first target layer.

Specifically, after receiving a search instruction sent by the first target layer to notify whether fast feedback is needed, the second target layer determines to feed back acknowledgement information for a data packet to the first target layer.

In this embodiment of the present invention, after the first target determines that the second target layer activates the fast feedback mechanism, the first target layer sends a search instruction for notifying whether fast feedback is required to be performed to the second target layer before determining, according to the received confirmation information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer.

A typical manner for the first target layer to send the search instruction for notifying whether fast feedback is required to be performed to the second target layer is to use a Polling mechanism, where the first target layer sets a Pbit in a sent data packet, and the Pbit is the search instruction for notifying whether fast feedback is required to be performed, and if the data packet is set with the Pbit, it means that the second target layer needs to feed back acknowledgement information for the data packet according to a transmission condition of the data packet.

In the embodiment of the present invention, when the first target layer sends the search instruction for notifying whether fast feedback is required to the second target layer, the search instruction for notifying whether fast feedback is required to be performed is carried in a data packet and sent to the second target layer mainly in the following form.

The notification feedback form one: after the first target layer sends N data packets every time, adding the search indication into the last data packet in the N data packets, and sending the data packets to the second target layer;

specifically, the second target layer is notified when to feed back acknowledgement information for the data packets to the first target layer based on the number N of the data packets, for example, from a time when the repeated transmission is activated, every time N data packets are sent, a Pbit is carried in the last sent data packet, that is, the search instruction is carried; the number N of the data packets can be configured through RRC;

correspondingly, the second target layer determines whether the search instruction for notifying that fast feedback is required to be performed is determined according to the last data packet of every sent N data packets of the first target layer;

specifically, after the second target layer receives N data packets sent by the first target layer, the second target layer determines, according to a last data packet of the N data packets, a search instruction carried in the last data packet for notifying whether fast feedback is required;

after the second target layer determines the search instruction, the second target layer feeds back confirmation information for the data packet to the first target layer according to the condition of receiving the data packet, so that the first target layer determines the data packet successfully sent to the second target layer according to the received confirmation information.

And a second notification feedback form: after the period of the first target layer is reached, adding the search indication into a data packet which needs to be sent currently, and sending the data packet to the second target layer, wherein N is a positive integer;

specifically, the second target layer is notified when to feed back acknowledgement information for the data packet to the first target layer based on the time length, for example, every time interval T (T is one period) from the time when the repeated transmission is activated, the search indication is added to the data packet that needs to be sent currently in the time length T, and the current data packet is sent to the second target layer; wherein the period duration T may be configured by RRC;

correspondingly, the second target layer determines the search indication for notifying whether fast feedback needs to be performed according to the data packet which needs to be sent currently after the first target layer period is reached;

And a third notification feedback form: the first target layer is M per transmission₁In one MAC PDU or per M₂Adding the search indication into the last complete R L C PDU or PDCP PDU at the end of one TTI, and sending to the second target layer, wherein M is₁、M₂Is a positive integer;

in particular, on a per M basis₁One MAC PDU or every M₂Informing the second target layer when to feed back acknowledgement information for the data packet to the first target layer at the end of TTI when the last complete R L C PDU or PDCP PDU is at every M₁One MAC PDU or every M₂The last complete R L C PDU or PDCP PDU at the end of TTI carries the search instruction and then is sent to the second target layer;

wherein M is₁And M₂Can be configured by RRC, and can also be 1. When M is₁And M₂When the MAC PDU or the PDCP PDU is 1, the search indication is sent to the second target layer for every MAC PDU or all complete R L C PDUs or PDCP PDUs at the end of every TTI, so that the second target layer can feed back the confirmation information of the data packet to the first target layer for all complete R L C PDUs or PDCP PDUs at the end of every MAC PDU or every TTI, and when the M PDU or the end of every TTI is sent, the search indication is sent to the second target layer₁And M₂When the value is 1, the second target layer feeds back to the first target layer most timely, and the first target layer is more favorable for confirming the transmission condition of the data packet.

Correspondingly, the second target layer sends M according to the first target layer₁In one MAC PDU or per M₂Determining the probing indication for notifying whether fast feedback is needed or not by the last complete R L C PDU or PDCP PDU at the end of one TTI;

It should be noted that when the second target layer determines when to feed back the acknowledgement information for the data packet to the first target layer, one of the two situations may exist, or both of the two situations may exist; if the data packets are simultaneously present, there is a signaling configuration to determine which case to adopt so that the second target layer determines when to feed back acknowledgement information for the data packets to the first target layer.

In implementation, the second target layer determines to feed back the acknowledgement information for the data packet to the first target layer according to the search instruction sent by the first target layer, or the second target layer determines when to feed back the acknowledgement information for the data packet to the first target layer, and the state of the transmitted data packet can be fed back without waiting for the timeout of the rearrangement timer, so that the feedback of the second target layer is more timely.

After determining to feed back acknowledgement information for the data packet to the first target layer, the second target layer determines the acknowledgement information in a series manner:

the first method is as follows: if the format of the acknowledgement information is ACK _ SN + bitmap, the second target layer takes the SN of the successfully transmitted first data packet as ACK _ SN, and generates bitmap according to the successfully transmitted data packet after the first data packet;

assume that the transmission of 9 packets from 1-9 is: 1-3,6-9, the first target layer takes the sequence number 1 of the first data packet which is successfully transmitted as ACK _ SN, and generates a bitmap according to that the first data packet only has the data packet which is successfully transmitted, wherein "1" indicates correct reception, "0" does not receive, and the bitmap is 11001111;

the second method comprises the following steps: if the format of the acknowledgement information is ACK _ SN + bitmap, the second target layer takes the SN of the last successfully transmitted data packet as ACK _ SN, and generates bitmap according to the successfully transmitted data packet before the last data packet;

assume that the transmission of 9 packets from 1-9 is: 1-3,6-9, the sequence number 9 of the first data packet which is successfully transmitted is ACK _ SN, and a bitmap is generated by the first target layer according to that the first data packet only has the data packet which is successfully transmitted, wherein "1" indicates correct reception, "0" does not receive, and the bitmap is 11100111;

the third method comprises the following steps: if the format of the acknowledgement information is ACK _ SN + SN _ Range, the second target layer takes the SN of the successfully transmitted data packet as ACK _ SN, and takes the number of data packets that are continuously and successfully transmitted after the successfully transmitted data packet as SN _ Range;

specifically, since the acknowledgement information is used to enable the first target layer to determine which data packets have been successfully transmitted, that is, which data packets have been successfully transmitted by the second target layer, the ACK _ SN list information may be directly carried in the control PDU, and since ACK _ SN may continuously occur and a plurality of continuous data packets are successfully transmitted, it is not necessary to list the sequence number of each successfully transmitted data packet, and it is only necessary to indicate how many continuously and successfully transmitted data packets, and an SN _ Range field is introduced to indicate how many continuous data packets following ACK _ SN are successfully transmitted;

for example, the transmission of 18 packets from 1-18 is: 1-5,8,11-18, and other data packets are not successfully transmitted, the feedback acknowledgment may be: the first ACK _ SN is 1, and at the same time SN _ Range is 4 (4 consecutive data packets are successfully transmitted after the 1 st data packet); the second ACK _ SN is 8 without SN _ Range field (SN _ Range field is optional and an extended edge may be used to indicate whether there is SN _ Range field after ACK _ SN); the third ACK _ SN _ 11 and SN _ Range _ 7 (7 consecutive packets are successfully transmitted after the 11 th packet);

it should be noted that, the first target layer may directly determine which data packets are successfully transmitted to the first target layer, so that the first target layer determines the successfully transmitted data packets, which is convenient for deleting the successfully transmitted data packets during repeated transmission, thereby saving resources.

The method is as follows: if the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, the second target layer uses the SN of the last successfully transmitted data packet as ACK _ SN, uses the SN of the unsuccessfully transmitted data packet before the last successfully transmitted data packet as NACK _ SN, and uses the number of consecutive unsuccessfully transmitted data after the unsuccessfully transmitted data packet as SN _ Range;

specifically, the sequence number of the last data packet which is successfully transmitted is used as the ACK _ SN, and the sequence numbers of all the unsuccessfully transmitted data packets before the ACK _ SN are listed, so that the rest of the unsuccessfully transmitted data packets are the successfully transmitted data packets, and therefore when most of the data packets are successfully transmitted and only a small number of the data packets fail to be transmitted, the NACK _ SN is used as a feedback mode which saves overhead, and the purpose of confirming the successful transmission can be achieved;

for example, if the sequence number of the last successfully transmitted data packet is 18, the transmission condition of the data packet before the 18 th data packet is determined, and the transmission conditions of the 18 data packets from 1 to 18 are: 1-5,8,13-18, and other packets are not successfully transmitted, and feeding back acknowledgement information to the first target layer in this manner may include: ACK _ SN 18, NACK _ SN 6& SN _ Range 1 (1 consecutive data packet after the 6 th data packet has not been successfully transmitted, i.e. 6, 7 have not been successfully transmitted); NACK _ SN 9& SN _ Range 3 (3 consecutive data packets from the 9 th packet have not been successfully transmitted, i.e. 9, 10, 11, 12 have not been successfully transmitted), and the remaining data packets have been successfully transmitted.

The length of the bitmap in the first mode and the second mode can be fixed size or variable size; if the length of the bitmap is variable, judging the specific length range of the bitmap according to the total length of the control PDU; the bitmap only needs to carry the latest transmission condition, and the transmission condition of the data packet confirmed before does not need to be carried again;

for example, when feedback of each TTI is configured, the bitmap fed back each time only needs to include the latest TTI transmission condition. Meanwhile, for the requirement of whole byte arrangement, if redundant bits exist, the transmission condition of other data packets next to the redundant bits can be carried.

After receiving the acknowledgement information for the data packet fed back by the second target layer, the first target layer determines the data packet successfully transmitted according to the format of the received acknowledgement information when determining the data packet successfully transmitted to the second target layer according to the acknowledgement information, and because the acknowledgement information sent to the first target layer by the second target layer has four formats, correspondingly, the first target layer also has four formats when receiving the acknowledgement information, detailed description is given below for each format of the acknowledgement information.

The first format is as follows: if the format of the acknowledgement information is ACK _ SN + bitmap, the first target layer takes a data packet corresponding to the ACK _ SN as a first data packet which is transmitted successfully, and determines the data packet which is transmitted successfully after the first data packet according to the numerical value of each bit in the bitmap;

according to the method that the second target layer feeds back the acknowledgement information aiming at the data packet to the first target layer in a first mode, the acknowledgement information received by the first target layer can be determined as follows: ACK _ SN is 1, and the bitmap value is: 11001111, indicating the successful transmission of the first packet, the successful transmission of the 2 nd and 3 rd packets, and the successful transmission of the 6 th to 9 th packets.

And a second format: if the format of the acknowledgement information is ACK _ SN + bitmap, the first target layer takes a data packet corresponding to the ACK _ SN as a last data packet which is successfully transmitted, and determines the data packet which is successfully transmitted before the last data packet according to the value of each bit in the bitmap;

according to the second target layer feeding back the acknowledgement information for the data packet to the first target layer in the second mode, it can be determined that the acknowledgement information received by the first target layer is: ACK _ SN is 9, and the bitmap value is: 11100111, indicating that the 9 th packet was successfully transmitted, the 6 th-8 th packets were successfully transmitted, and the 1 st-3 rd packets were successfully transmitted.

And a third format: if the format of the acknowledgement information is ACK _ SN + SN _ Range, the first target layer takes a data packet corresponding to ACK _ SN as a successfully transmitted data packet, and takes SN _ Range data packets that are continuously and successfully transmitted after the successfully transmitted data packet as successfully transmitted data packets;

according to the third method for feeding back the acknowledgement information for the data packet from the second target layer to the first target layer, it can be determined that the acknowledgement information received by the first target layer is: the first ACK _ SN is 1, while SN _ Range is 4 (4 consecutive packets are successfully transmitted after the 1 st packet), the second ACK _ SN is 8 (successfully transmitted after the 8 th packet), the third ACK _ SN is 11, while SN _ Range is 7 (7 consecutive packets are successfully transmitted after the 11 th packet).

And a fourth format: if the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, the first target layer takes ACK _ SN as the last data packet successfully transmitted, takes a data packet corresponding to NACK _ SN as a data packet unsuccessfully transmitted before the last data packet successfully transmitted, and takes data packets other than SN _ Range data packets which are continuously unsuccessfully transmitted after the unsuccessfully transmitted data packet as successfully transmitted data packets;

according to the fourth feedback of the acknowledgement information for the data packet from the second target layer to the first target layer, it can be determined that the acknowledgement information received by the first target layer is: ACK _ SN 18, NACK _ SN 6& SN _ Range 1 (1 consecutive data packet after the 6 th data packet has not been successfully transmitted, i.e. 6, 7 have not been successfully transmitted); NACK _ SN 9& SN _ Range 3 (3 consecutive data packets from the 9 th packet have not been successfully transmitted, i.e. 9, 10, 11, 12 have not been successfully transmitted), and the remaining data packets have been successfully transmitted.

It should be noted that, if the first target layer is a PDCP layer, the first target layer receives, through a PDU type field in a PDCPcontrol PDU, acknowledgement information sent by the second target layer; or

If the first target layer is an R L C layer, the first target layer receives the acknowledgement information sent by the second target layer through a PDUtype field in an R L C control PDU;

therefore, the first target layer needs to allocate a separate PDU type field for receiving the acknowledgement information sent by the second target layer.

In implementation, the first target layer confirms the successfully sent data packet according to the confirmation information sent by the second target layer, and the first target layer can confirm the successfully sent data packet in time without determining the data packet which is failed to be sent, so that other transmission paths are instructed to give up confirming the transmission of the successfully sent data packet, and resources are saved.

The first target layer determines that the data packet sent to the second target layer is successful according to the confirmation information for the data packet fed back by the second target layer, and then abandons the transmission of the successfully sent data packet in the path of the R L C layer connected with the PDCP layer in other layers, because the first target layer is the PDCP layer or the R L C layer, the operation executed is different when the first target layer is different, and the detailed description is carried out on the PDCP layer as the first target layer and the R L C layer as the first target layer.

The first condition is as follows: the first target layer is a PDCP layer.

If the first target layer is a PDCP layer, the first target layer notifies at least one R L C layer connected to the PDCP layer to abort transmission of a successfully transmitted packet according to the received acknowledgement information.

Specifically, after the PDCP layer receives the acknowledgement information fed back by the second target layer (i.e., the second PDCP layer, i.e., the PDCP layer of the receiving device), and determines that the data packet has been successfully transmitted, the PDCP layer notifies at least one R L C layer connected to the PDCP layer to abort transmission of the successfully transmitted data packet.

In case two, the second target layer is an R L C layer.

If the first target layer is the R L C layer, the first target layer notifies the connected PDCP layer to abort transmission of the successfully transmitted data packet according to the received acknowledgement information;

the PDCP layer informs at least one R L C layer connected with the PDCP layer to abort transmission of a successfully transmitted packet.

Specifically, the R L C layer receives acknowledgement information fed back by the second target layer (the second R L C layer, i.e., the R L C layer of the receiving device), and after determining that the data packet has been successfully transmitted according to the acknowledgement information, the R L C layer notifies the PDCP layer connected to the R L C layer to abort transmission of the successfully transmitted data packet, so that the PDCP layer notifies at least one R L C layer connected to the PDCP layer to abort transmission of the successfully transmitted data packet.

Based on the above, when the other PDCP-R L C path is notified to abort transmission of the successfully transmitted data packet, if the other PDCP-R L C path has already started successful transmission of the transmitted data packet, the successfully transmitted data packet is continuously transmitted on the path, so as to keep the protocol process proceeding smoothly, or if the other PDCP-R L C path has not started successful transmission of the transmitted data packet, the successfully transmitted data packet is deleted on the path, so as to save resources.

It should be noted that, if the acknowledgement information includes NACK information, if there is no special configuration, retransmission of the unsuccessfully transmitted data packet is not required, if retransmission is configured, retransmission may be based on fast feedback, otherwise, retransmission is not uniformly performed.

In implementation, after receiving the acknowledgement information, the first target layer determines the successfully transmitted data packet according to the acknowledgement information, and notifies other transmission paths to abandon transmission of the successfully transmitted data packet, thereby preventing redundant transmission and saving resources.

As shown in fig. 6, a first apparatus for repeatedly transmitting acknowledgements according to an embodiment of the present invention includes a processor 600, a memory 601, and a transceiver 602;

the processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 600 in performing operations. The transceiver 602 is used to receive and transmit data under the control of the processor 600.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 600 and various circuits of memory represented by memory 601 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 601 may store data used by the processor 600 in performing operations.

The processes disclosed in the embodiments of the present invention may be applied to the processor 600, or implemented by the processor 600. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 600. The processor 600 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in 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 in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 600 is configured to read the program in the memory 601 and execute:

Optionally, the processor 600 is further configured to:

informing the first target layer to turn on or off the fast feedback mechanism through a first RRC layer; and/or

Notifying the first target layer through a first MAC layer to activate or deactivate the fast feedback mechanism.

Optionally, the processor 600 is further configured to:

and sending a search instruction for notifying whether quick feedback is needed to be carried out to the second target layer through the first target layer.

Optionally, the processor 600 is specifically configured to:

m per send over the first target layer₁In one MAC PDU or per M₂Adding the search indication into the last complete R L C PDU or PDCP PDU at the end of one TTI, and sending the search indication to the second target layer;

wherein, the N, M₁、M₂Is a positive integer.

Optionally, the processor 600 is specifically configured to:

if the format of the acknowledgement information is ACK _ SN + bitmap, the data packet corresponding to the ACK _ SN is used as a first data packet which is transmitted successfully through the first target layer, and the data packet which is transmitted successfully after the first data packet is determined according to the numerical value of each bit in the bitmap; or

If the format of the acknowledgement information is ACK _ SN + bitmap, the data packet corresponding to the ACK _ SN is used as the last data packet successfully transmitted by the first target layer, and the data packet successfully transmitted before the last data packet is determined according to the value of each bit in the bitmap; or

If the format of the acknowledgement information is ACK _ SN + SN _ Range, using a data packet corresponding to ACK _ SN as a successfully transmitted data packet through the first target layer, and using SN _ Range data packets which are continuously and successfully transmitted after the successfully transmitted data packet as successfully transmitted data packets; or

If the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, using, by the first target layer, ACK _ SN as a last data packet successfully transmitted, using a data packet corresponding to NACK _ SN as a data packet unsuccessfully transmitted before the last data packet successfully transmitted, and using data packets other than SN _ Range data packets that are continuously unsuccessfully transmitted after the unsuccessfully transmitted data packet as successfully transmitted data packets.

Optionally, the processor 600 is further configured to:

If the first target layer is the R L C layer, notifying a connected PDCP layer through the first target layer according to the received acknowledgement information to abort transmission of a successfully transmitted packet;

Fig. 7 is a schematic structural diagram of a second apparatus for repeatedly transmitting an acknowledgement according to an embodiment of the present invention, where the apparatus includes a first determining module 700, a second determining module 710;

the first determining module 700 is configured to determine, by the first target layer, that the second target layer activates the fast feedback mechanism;

the second determining module 710 is configured to determine, by the first target layer, a data packet successfully sent to the second target layer according to the received acknowledgement information for the data packet fed back by the second target layer;

As shown in fig. 8, a third apparatus for repeatedly transmitting acknowledgements according to an embodiment of the present invention includes a processor 800, a memory 801, and a transceiver 802;

the processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 800 in performing operations. The transceiver 802 is used to receive and transmit data under the control of the processor 800.

The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 800 and various circuits of memory represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 800 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 800 in performing operations.

The processes disclosed in the embodiments of the present invention may be implemented in the processor 800, or implemented by the processor 800. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 800. The processor 800 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in 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 in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 801, and the processor 800 reads the information in the memory 801 and completes the steps of the signal processing flow in combination with the hardware thereof.

Specifically, the processor 800 is configured to read the program in the memory 801 and execute:

activating a fast feedback mechanism through a second target layer;

Optionally, the processor 800 is further configured to:

informing the second target layer to start or close a fast feedback mechanism through a second RRC layer; and/or

Notifying the second target layer through a second MAC layer to activate or deactivate the fast feedback mechanism;

optionally, the processor 800 is further configured to:

and receiving a search instruction which is sent by the first target layer and used for informing whether quick feedback is needed or not through the second target layer.

Optionally, the processor 800 is specifically configured to:

determining, by the second target layer, the seek indication for notifying whether fast feedback is required according to a last data packet of every N data packets sent by the first target layer; or

Determining, by the second target layer, the search indication for notifying whether fast feedback is required according to a data packet that is currently required to be sent after the first target layer period is reached; or

Sending M per each time according to the first target layer through the second target layer₁In one MAC PDU or per M₂Determining the probing indication for notifying whether fast feedback is needed or not by the last complete R L C PDU or PDCP PDU at the end of one TTI;

the processor 800 is further configured to: determining, by the second target layer, whether to feed back confirmation information to the first target layer according to the received search instruction for notifying whether fast feedback is required;

wherein, the N, M₁、M₂Is a positive integer.

Optionally, the processor 800 is specifically configured to:

after determining that the second target layer receives N data packets every time, feeding the confirmation information back to the first target layer; or

After the second target layer is determined to arrive at the period, feeding back the confirmation information to the first target layer; or

Determining the second target layer is at every M₁In one MAC PDU or per M₂Feeding back the confirmation information to the first target layer at the end of each TTI;

wherein, the N, M₁、M₂Is a positive integer.

Optionally, the processor 800 determines the confirmation information by:

if the format of the acknowledgement information is ACK _ SN + bitmap, using the SN of the first data packet which is successfully transmitted as ACK _ SN through the second target layer, and generating bitmap according to the data packet which is successfully transmitted after the first data packet; or

If the format of the acknowledgement information is ACK _ SN + bitmap, using the SN of the last successfully transmitted data packet as ACK _ SN through the second target layer, and generating bitmap according to the data packet successfully transmitted before the last data packet; or

If the format of the acknowledgement information is ACK _ SN + SN _ Range, using, by the second target layer, the SN of the successfully transmitted data packet as ACK _ SN, and using the number of data packets successively and successfully transmitted after the successfully transmitted data packet as SN _ Range; or

As shown in fig. 9, a fourth apparatus for repeated transmission acknowledgement according to an embodiment of the present invention includes an activation module 900, a feedback module 910;

the activation module 900 is configured to activate a fast feedback mechanism through a second target layer;

the feedback module 910 is configured to feed back, to the first target layer, acknowledgement information for the data packet through the second target layer;

Based on the same inventive concept, the embodiment of the present invention further provides a method for repeated transmission acknowledgement, and since the device corresponding to the method is the device for repeated transmission acknowledgement in the embodiment of the present invention, and the principle of the device for solving the problem is similar to the method, the implementation of the method can refer to the implementation of the device, and repeated parts are not described again.

As shown in fig. 10, a flowchart of a method for repeatedly transmitting an acknowledgement according to an embodiment of the present invention specifically includes the following steps:

step 1000, a first target layer determines that a second target layer activates a fast feedback mechanism;

step 1010, the first target layer determines, according to the received acknowledgement information for the data packet fed back by the second target layer, the data packet successfully sent to the second target layer.

Wherein the first and second target layers are PDCP layers or the first and second target layers are R L C layers.

Optionally, the first RRC layer notifies the first target layer to turn on or turn off the fast feedback mechanism; and/or

Optionally, after the first target layer determines that the second target layer activates the fast feedback mechanism, before determining, according to the received acknowledgement information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer, the method further includes:

and the first target layer sends a search instruction for informing whether quick feedback is needed or not to the second target layer.

Optionally, the sending, by the first target layer, a search instruction for notifying whether fast feedback is required to be performed to the second target layer includes:

the first target layer is M per transmission₁In one MAC PDU or per M₂Adding the search indication into the last complete R L CPDU or PDCP PDU at the end of one TTI, and sending the search indication to the second target layer;

wherein, the N, M₁、M₂Is a positive integer.

Optionally, the determining, by the first target layer, the data packet successfully sent to the second target layer according to the received acknowledgement information for the data packet fed back by the second target layer includes:

if the format of the acknowledgement information is ACK _ SN + bitmap, the first target layer takes a data packet corresponding to the ACK _ SN as a first data packet which is transmitted successfully, and determines the data packet which is transmitted successfully after the first data packet according to the numerical value of each bit in the bitmap; or

If the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, the first target layer uses ACK _ SN as the last data packet successfully transmitted, uses a data packet corresponding to NACK _ SN as a data packet unsuccessfully transmitted before the last data packet successfully transmitted, and uses data packets other than SN _ Range data packets that are continuously unsuccessfully transmitted after the unsuccessfully transmitted data packet as successfully transmitted data packets.

Optionally, after the first target layer determines, according to the received acknowledgement information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer, the method further includes:

Based on the same inventive concept, another method for repeatedly transmitting and confirming is also provided in the embodiments of the present invention, and as the device corresponding to the method is the device for repeatedly transmitting and confirming in the embodiments of the present invention, and the principle of the device for solving the problem is similar to the method, the implementation of the method can refer to the implementation of the device, and the repeated parts are not described again.

As shown in fig. 11, a flowchart of a method for repeatedly transmitting an acknowledgement according to an embodiment of the present invention specifically includes the following steps:

1100, activating a quick feedback mechanism by the second target layer;

step 1110, the second target layer feeds back acknowledgement information for the data packet to the first target layer;

Optionally, the second RRC layer notifies the second target layer to turn on or turn off the fast feedback mechanism; and/or

The second MAC layer informs the second target layer to activate or deactivate the fast feedback mechanism;

optionally, after the second target layer activates the fast feedback mechanism, before the second target layer feeds back the acknowledgement information for the data packet to the first target layer, the method further includes:

and the second target layer receives a search instruction which is sent by the first target layer and used for informing whether quick feedback is needed or not.

Optionally, the receiving, by the second target layer, a search instruction sent by the first target layer and used for notifying whether fast feedback is needed includes:

after the second target layer receives a search instruction sent by the sending device for notifying whether fast feedback is needed, the method further includes:

and the second target layer determines whether to feed back confirmation information to the first target layer according to the received search indication for informing whether quick feedback is needed.

Optionally, the feeding back, by the second target layer, acknowledgement information for the data packet to the first target layer includes:

wherein, the N, M₁、M₂Is a positive integer.

Optionally, the second target layer determines the confirmation information in the following manner:

Embodiments of the present invention also provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in fig. 10 above, or implements the steps of the method described in fig. 11 above.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for repeatedly transmitting acknowledgements, the method comprising:

a first target layer determines that a second target layer activates a fast feedback mechanism, wherein the first target layer and the second target layer are Packet Data Convergence Protocol (PDCP) layers, or the first target layer and the second target layer are radio link control (R L C) layers;

2. The method of claim 1, wherein the method further comprises:

the first Radio Resource Control (RRC) layer informs the first target layer to start or close the fast feedback mechanism; and/or

The first media access control, MAC, layer informs the first target layer to activate or deactivate the fast feedback mechanism.

3. The method of claim 1, wherein after the first target layer determines that the second target layer activates the fast feedback mechanism, before determining that the data packet sent to the second target layer is successful according to the received acknowledgement information for the data packet fed back by the second target layer, further comprising:

4. The method of claim 3, wherein the first target layer sending a seek indication to the second target layer informing whether fast feedback is needed, comprising:

the first target layer is M per transmission₁In individual MAC PDU or per M₂Adding the search indication into the last complete radio link control protocol data unit R L C PDU or packet data convergence protocol data unit PDCP PDU at the end of each transmission time interval TTI, and transmitting to the second target layer;

wherein, the N, M₁、M₂Is a positive integer.

5. The method of claim 1, wherein the determining, by the first target layer, the data packet successfully sent to the second target layer according to the received acknowledgement information for the data packet fed back by the second target layer comprises:

if the format of the acknowledgement information is a correct response instruction sequence number ACK _ SN + bitmap, the first target layer takes a data packet corresponding to the ACK _ SN as a first data packet which is transmitted successfully, and determines a data packet which is transmitted successfully after the first data packet according to the numerical value of each bit in the bitmap; or

If the format of the acknowledgement information is ACK _ SN + NACK _ SN + SN _ Range, the first target layer uses ACK _ SN as the last data packet successfully transmitted, uses a data packet corresponding to an error response instruction sequence number NACK _ SN as a data packet unsuccessfully transmitted before the last data packet successfully transmitted, and uses data packets other than SN _ Range data packets which are continuously unsuccessfully transmitted after the unsuccessfully transmitted data packet as data packets successfully transmitted.

6. The method according to any one of claims 1 to 5, wherein after the first target layer determines, according to the received acknowledgement information for the data packet fed back by the second target layer, that the data packet is successfully sent to the second target layer, the method further comprises:

7. A method for repeatedly transmitting acknowledgements, the method comprising:

the second target layer activates a fast feedback mechanism;

8. The method of claim 7, wherein the method further comprises:

the second RRC layer informs the second target layer to start or close the fast feedback mechanism; and/or

9. The method of claim 7, wherein after activating the fast feedback mechanism, the second target layer further comprises, before feeding back acknowledgement information for the packet to the first target layer:

10. The method of claim 9, wherein the second target layer receiving a seek indication sent by the first target layer to inform whether fast feedback is needed comprises:

and the second target layer determines to feed back confirmation information to the first target layer according to the received search indication for informing whether quick feedback is needed.

11. The method of claim 7, wherein the second target layer feeding back acknowledgement information for the packet to the first target layer comprises:

wherein, the N, M₁、M₂Is a positive integer.

12. The method of claim 7, wherein the second target layer determines the confirmation information by:

13. An apparatus for repeatedly transmitting acknowledgements, the apparatus comprising: a processor, a memory, and a transceiver;

14. The device of claim 13, wherein the processor is further configured to:

15. The device of claim 13, wherein the processor is further configured to:

16. The device of claim 15, wherein the processor is specifically configured to:

m per send over the first target layer₁In one MAC PDU or per M₂Adding the search indication into the last complete R L CPDU or PDCP PDU at the end of one TTI, and sending the search indication to the second target layer;

wherein, the N, M₁、M₂Is a positive integer.

17. The device of claim 13, wherein the processor is specifically configured to:

18. The apparatus of any of claims 13 to 17, wherein the processor is further configured to:

And if the first target layer is the R L C layer, informing a connected PDCP layer to abandon the transmission of the data packets which are successfully transmitted through the first target layer according to the received confirmation information, and informing at least one R L C layer connected with the PDCP layer to abandon the transmission of the data packets which are successfully transmitted through the PDCP layer.

19. An apparatus for repeatedly transmitting acknowledgements, the apparatus comprising: a processor, a memory, and a transceiver;

activating a fast feedback mechanism through a second target layer;

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

determining, through a second RRC layer notification, that the second target layer turns on or off the fast feedback mechanism; and/or

Determining, by a second MAC layer notification, that the second target layer activates or deactivates the fast feedback mechanism.

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

22. The device of claim 21, wherein the processor is specifically configured to:

the processor is further configured to: determining, by the second target layer, whether to feed back confirmation information to the first target layer according to the received search instruction for notifying whether fast feedback is required;

wherein, the N, M₁、M₂Is a positive integer.

23. The device of claim 19, wherein the processor is specifically configured to:

wherein, the N, M₁、M₂Is a positive integer.

24. The device of claim 19, wherein the processor determines the confirmation information by:

25. An apparatus for repeatedly transmitting acknowledgements, the apparatus comprising:

26. An apparatus for repeatedly transmitting acknowledgements, the apparatus comprising:

27. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6 or 7 to 12.