CN111405609B - Data transmission method, device, system, medium and equipment - Google Patents
Data transmission method, device, system, medium and equipment Download PDFInfo
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- CN111405609B CN111405609B CN201910001894.9A CN201910001894A CN111405609B CN 111405609 B CN111405609 B CN 111405609B CN 201910001894 A CN201910001894 A CN 201910001894A CN 111405609 B CN111405609 B CN 111405609B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1657—Implicit acknowledgement of correct or incorrect reception, e.g. with a moving window
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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Abstract
The present invention relates to the field of wireless technologies, and in particular, to a data transmission method, apparatus, system, medium, and device. The embodiment of the invention provides a data transmission mode with partial confirmation, and the influence of transmission delay on data transmission is reduced. On the premise of ensuring the correct data transmission, the data sending window can be optimized by distributing a new serial number to the data packet, so that the condition that the sending window is congested due to too long transmission delay is avoided, and the problem of too long serial number is also avoided.
Description
Technical Field
The present invention relates to the field of wireless technologies, and in particular, to a data transmission method, apparatus, system, medium, and device.
Background
In a new air interface (NR) system, the radio link layer control protocol (RLC) layer has three transmission modes: acknowledged Mode (AM), unacknowledged Mode (UM), and Transparent Mode (TM).
Confirming mode: the sender adds the necessary control protocol overhead on the high-level data before transmitting and ensuring delivery to the peer entity. Because of the automatic repeat request (ARQ) capability, if the receiving RLC receives an erroneous data packet (RLC PDU), the transmitting RLC is notified to retransmit the RLC PDU. The RLC PDU contains sequence number information, so that the sequential/out-of-order delivery of data to a higher layer is supported. The AM mode is a standard mode of packet data transmission.
Non-acknowledgement mode: the sender adds the necessary control protocol overhead on the higher layer data packets and then transmits but does not guarantee delivery to the peer entity and no retransmission protocol is used. Since the RLC PDU contains sequence number information, the integrity of the higher layer data packet can be detected.
Transparent mode: the sender does not add any additional control protocol overhead on the higher layer data.
The services of various new services and the current service have different characteristics, and meanwhile, the next-generation communication system has different characteristics. For example, in non-terrestrial communication, the influence of a high air interface delay on the system needs to be considered. The acknowledged mode cannot be applied to the case of high air interface delay, and the unacknowledged mode and the transparent mode cannot guarantee the accuracy of data transmission.
Therefore, it is desirable to provide a data transmission method applicable to services requiring both transmission delay and transmission accuracy.
Disclosure of Invention
Embodiments of the present invention provide a data transmission method, apparatus, system, medium, and device, which are used to solve the problem that a smaller data transmission delay and a higher data transmission accuracy cannot be guaranteed at the same time.
The invention provides a data transmission method, which comprises the following steps:
receiving an acknowledgement identifier, wherein the acknowledgement identifier is generated uniformly for at least two data packets, and the acknowledgement identifier is used for indicating whether the at least two data packets are all received correctly;
and allocating the latest sequence number to the data packet which is not correctly received according to the confirmation identification, and continuously transmitting the data packet with the sequence number in the transmission window.
The invention also provides a data transmission method, which comprises the following steps:
receiving at least two data packets;
uniformly generating an acknowledgement identifier for the at least two data packets, wherein the acknowledgement identifier is used for indicating whether the at least two data packets are correctly received or not;
and sending the confirmation identification.
The invention also provides a data transmission system, which comprises a radio link layer control protocol RLC layer receiving entity device and an RLC layer transmitting entity device, wherein:
the RLC layer receiving entity apparatus is configured to receive at least two data packets sent by the RLC layer sending entity apparatus, generate an acknowledgement identifier for the at least two data packets in a unified manner, where the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received, and send the acknowledgement identifier to the RLC layer sending entity apparatus;
and the RLC layer sending entity device is used for receiving the confirmation identifier, distributing the latest sequence number to the data packet which is not correctly received according to the confirmation identifier, and continuously sending the data packet with the sequence number in the sending window to the RLC layer receiving entity device.
The invention also provides a device for sending the entity by the RLC layer of the radio link layer control protocol, which comprises the following steps:
a receiving module, configured to receive an acknowledgement identifier, where the acknowledgement identifier is generated uniformly for at least two data packets, and the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received;
and the processing module is used for distributing the latest sequence number for the data packet which is not correctly received according to the confirmation identification and continuously sending the data packet with the sequence number in the sending window.
The invention also provides a device for receiving the entity of the radio link layer control protocol RLC layer, which comprises:
the receiving module is used for receiving at least two data packets;
a generating module, configured to uniformly generate an acknowledgement identifier for the at least two data packets, where the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received;
and the sending module is used for sending the confirmation identification.
The present invention also provides a non-transitory computer storage medium storing an executable program for execution by a processor to perform the steps of implementing any of the methods described above.
The invention also provides data transmission equipment, which comprises a memory, a processor, a transceiver and a bus interface; the processor is used for reading the program in the memory and executing:
receiving, by the transceiver, an acknowledgement flag, the acknowledgement flag being generated uniformly for at least two data packets, and the acknowledgement flag being used to indicate whether the at least two data packets are both received correctly; according to the confirmation mark, distributing the latest sequence number for the data packet which is not correctly received, and continuously sending the data packet with the sequence number in the sending window through the transceiver; or, performing:
receiving, by the transceiver, at least two data packets; generating an acknowledgement identifier for the at least two data packets uniformly, wherein the acknowledgement identifier is used for indicating whether the at least two data packets are both received correctly; transmitting, by the transceiver, the acknowledgement identification.
According to the scheme provided by the embodiment of the invention, the receiving end can generate the confirmation identification for a plurality of received data packets at a time, one confirmation identification is used for indicating whether the plurality of data packets are correctly received, and the sending end can allocate the latest sequence number to the data packets which are not correctly received according to the received confirmation identification and continue to send the data packets with the sequence numbers in the sending window. Therefore, the feedback of the traditional confirmation mode is updated to be unified feedback aiming at a series of data packets, the scene requirement of high air interface delay is met, the small transmission delay is ensured, meanwhile, the retransmission of the data packets can be realized in a mode of redistributing the serial numbers to the data packets, and the accuracy of data transmission is ensured. And by distributing a new sequence number to the data packet, the data sending window can be optimized, the condition of sending window congestion caused by too long transmission delay is avoided, and the problem of too long sequence number is also avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flowchart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a data transmission method according to a second embodiment of the present invention;
fig. 3 is a schematic flowchart of a data transmission method according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a data transmission system according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an RLC layer transmitting entity apparatus according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of an RLC layer receiving entity apparatus according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a data transmission device according to a seventh embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a partially confirmed data transmission mode, which is suitable for a scene with higher air interface delay and is suitable for services with requirements on transmission delay and transmission accuracy. The scheme provided by the embodiment of the invention can reduce the influence of transmission delay on data transmission. On the premise of ensuring correct data transmission, the data sending window can be optimized by distributing a new serial number to the data packet, so that the condition of sending window congestion caused by too long transmission delay is avoided, and the problem of too long serial number is also avoided.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, the "plurality" or "a plurality" mentioned herein means two or more. "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.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
An embodiment of the present invention provides a data transmission method, where the method is understood to be applied to a radio link layer control protocol (RLC) layer sending entity apparatus, that is, an RLC layer sending end, and a flow of steps of the method may be as shown in fig. 1, where the method includes:
step 101, receiving a confirmation identifier.
In this step, the RLC layer transmitting entity apparatus may receive an acknowledgement flag, where the acknowledgement flag is generated for at least two data packets in a unified manner, and the acknowledgement flag is used to indicate whether the at least two data packets are both received correctly. The confirmation identifier is generated uniformly aiming at least two data packets and fed back at one time, so that the method can be suitable for a scene with higher air interface time delay and ensures smaller transmission time delay.
Of course, it is understood that the RLC layer transmitting entity apparatus has transmitted at least two data packets before this step.
And step 102, continuing to send the data packet.
In this step, the RLC layer transmitting entity apparatus may assign the latest sequence number to the data packet which is not correctly received according to the received acknowledgement identifier, and continue to transmit the data packet whose sequence number is within the transmission window. Therefore, retransmission of the data packet which is not correctly received can be realized, and the accuracy of data transmission is ensured.
In this embodiment, the manner of transmitting the packet with the sequence number within the transmission window is the same as that of the related art. That is, the data packets having sequence numbers within the transmission window may be sequentially transmitted in sequence number order.
It should be noted that, while the data packet with the sequence number in the transmission window continues to be transmitted, the transmitted data packet may be stored in the retransmission data area, so that data retransmission may be implemented according to the data packet stored in the retransmission data area.
When the acknowledgment identifier indicates that the at least two data packets are correctly received, in this step, the data packet corresponding to the acknowledgment identifier stored in the retransmission data area may be cleared, and the data packet with the sequence number in the transmission window may be transmitted.
When the acknowledgment identifier indicates that none of the at least two data packets has been correctly received, in this step, the latest sequence number may be used as the sequence number of the data packet corresponding to the acknowledgment identifier, the data packet with the sequence number in the transmission window may be transmitted, and the data packet corresponding to the acknowledgment identifier stored in the retransmission data area may be cleared.
When the at least two data packet portions are correctly received, in this step, the latest sequence number may be used as the sequence number of the data packet that is not correctly received in the data packet corresponding to the acknowledgement identifier, the data packet with the sequence number in the transmission window may be transmitted, and the data packet corresponding to the acknowledgement identifier stored in the retransmission data area may be cleared.
That is, in this embodiment, when data is retransmitted, a new sequence number of a data packet may be used, which is more favorable for maintaining a transmission window, avoiding a situation of saving a large amount of retransmitted data due to air interface delay, and avoiding a problem of an excessively long Sequence Number (SN).
It should be noted that, for the retransmitted data packets, the retransmission times of the data packets may be recorded, and when the retransmission times of the data packets reach a specified maximum number, the upper layer may be notified that the data packets have failed to be transmitted, and the retransmission is not performed any more.
In one possible implementation, the data packets may be transmitted in the form of data packets. That is, the data packets with the sequence numbers in the transmission window may be grouped, each data group includes at least two data packets, and the data packets marked with the group number of the group in which the data packets are located and the sequence numbers in the group are transmitted.
It should be noted that, the data packets with serial numbers in the transmission window are grouped and then transmitted, which may be understood as grouping the data packets according to the sequence of the serial numbers, and after marking each data packet with the group number of the group in which the data packet is located and the serial number in the group, the data packets are sequentially transmitted according to the sequence of the serial numbers. That is, it can be understood that the data packets with sequence numbers within the transmission window are grouped and transmitted without changing the transmission sequence of each data packet.
It should be noted that, in this embodiment, only the data packet with the sequence number within the transmission window can be transmitted. The transmission window can be understood as a window of fixed length, the lower edge of the transmission window can be updated according to the timer and the status report, and the upper edge of the transmission window is the lower edge plus the fixed window length.
Updating the lower edge of the sending window according to the status report may be that, when the status report is received, if the status report includes the group number of the data group corresponding to the lower edge of the sending window, the lower edge of the sending window is updated to the next data group that is not sent. It can be understood that, after receiving the status report, if the status report includes the group number of the data group corresponding to the lower edge of the sending window, whether the feedback corresponding to the data group is that the data packet in the data group is correctly received or not, the lower edge of the sending window is updated to be the next unsent data group.
Updating the lower edge of the sending window according to the timer, wherein a retransmission timer is started after the sending of one data group is finished; and if the retransmission timer is overtime, retransmitting the data group, marking each data packet in the data group by using the serial number in the group and the latest group number, and updating the lower edge of the sending window to the next unsent data group. It will be appreciated that if the retransmission timer times out, by default, none of the packets in the data group are received correctly, the data group is retransmitted using the latest group number and sequence number, and the lower edge of the transmission window may be updated to be the next unsent data group.
Example two
An embodiment of the present invention provides a data transmission method, where the method may be understood as being applied to an RLC layer receiving entity apparatus, that is, an RLC layer receiving end, and a flow of steps of the method may be as shown in fig. 2, where the method includes:
step 201, receiving a data packet.
In this step, the RLC layer receiving entity apparatus can receive at least two data packets.
Step 202, generating a confirmation identification.
In this step, the RLC layer receiving entity apparatus may uniformly generate an acknowledgement identifier for the at least two data packets, where the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received.
It should be noted that the RLC layer transmitting entity apparatus may transmit the data packets in the form of data packets. If the at least two received data packets belong to the same data group in step 201, the RLC layer receiving entity apparatus may generate an acknowledgement flag for the data group in this step.
In a possible implementation manner, if the at least two data packets are correctly received, the acknowledgement identifier generated by the RLC layer receiving entity apparatus may include a correct sending identifier and a group number of the data group;
if none of the at least two data packets is correctly received, the acknowledgement identifier generated by the RLC layer receiving entity apparatus may include an erroneous transmission identifier and the group number of the data group;
if the at least two data packet parts are received correctly, the acknowledgement flag generated by the RLC layer receiving entity apparatus may include a correct sending flag, a group number of the data group, and an intra-group sequence number of a data packet that is not received correctly.
Step 203, sending the confirmation identification.
In this step, the RLC layer receiving entity apparatus may transmit the generated acknowledgement flag to the RLC layer transmitting entity apparatus.
The following describes the embodiments of the first and second embodiments of the present invention by a specific example.
EXAMPLE III
The third embodiment of the present invention provides a data transmission method, which takes an example that an RLC layer sending entity apparatus (sending end) transmits a data packet in the form of a data group, and an RLC layer receiving entity apparatus (receiving end) generates an acknowledgement identifier for each data group as an example for explanation. The flow of steps of the method can be shown in fig. 3, and includes:
step 301, transmitting the data packet.
When data transmission is initially performed, the RLC layer transmitting entity apparatus may perform packet transmission on a data packet having a sequence number within a transmission window. And the data packet can be stored in the retransmission data area for retransmission while the data packet is transmitted.
Assuming that there are 12 data packets with sequence numbers within the transmission window, in this embodiment, the 12 data packets may be divided into 3 groups for transmission, the group numbers may be respectively represented by group 1, group 2, and group 3, for each group there are 4 data packets, the sequence numbers within each group may be represented by 1, 2, 3, and 4, and a schematic diagram of each data group may be as shown in fig. 3.
Step 302, receiving a confirmation identification.
After receiving 4 data packets in a data group, the RLC layer receiving entity apparatus may generate an acknowledgement identifier for the data group, and may feed back the generated acknowledgement identifier to the RLC layer transmitting entity apparatus.
Assuming that all 4 data packets in group 1 are received correctly, the generated acknowledgement flag may include a correct transmission flag and a group number (group 1), and the acknowledgement flag at this time may be denoted as ACK1.
Assuming that 3 data packets in group 2 are correctly received and a data packet with an intra-group sequence number of 2 is not correctly received, the generated acknowledgement identifier may include a correct transmission identifier, a group number (group 2), and an intra-group sequence number (2) of a data packet that is not correctly received, and the acknowledgement identifier at this time may be represented as ACK2 and NACK packet 2.
Assuming that none of the 4 data packets in group 3 were received correctly, the generated acknowledgement flag may include the erroneously transmitted flag and the group number (group 3), and the acknowledgement flag at this time may be denoted as NACK3.
And step 303, sending the data packet according to the confirmation identifier.
For the acknowledgement flag ACK1, the data packet corresponding to group 1 stored in the retransmission data area may be emptied.
For the acknowledgement identifiers ACK2 and NACK packet 2, the latest sequence number may be used as the sequence number of the data packet with the intra-group sequence number 2 in group 2, so that the data packet with the intra-group sequence number 2 in group 2 may obtain a new sequence number to wait for retransmission, and the data packet corresponding to group 2 stored in the retransmission data region may be emptied.
Because the data packet with the intra-group sequence number of 2 in the group 2 obtains a new sequence number, when the sequence number is located in the transmission window, the data packets with the sequence numbers in the transmission window are grouped, the corresponding group number and intra-group sequence number are all brand new, and in this embodiment, it is assumed that the corresponding new group number is a group N (N can be understood as a positive integer greater than 3), and the intra-group sequence number is 4. So that the data packet with the sequence number 2 in the original group 2 can be retransmitted by using the group N and the sequence number 4 in the group.
For the acknowledgement flag NACK3, the latest sequence number may be allocated to 4 data packets in the group 3, so that all 4 data packets in the group 3 may obtain a new sequence number to wait for retransmission, and the data packet corresponding to the group 3 stored in the retransmission data region may be emptied.
Because 4 data packets in group 3 all obtain new serial numbers, when the serial numbers of the 4 data packets are located in the transmission window, the data packets with the serial numbers in the transmission window are grouped, the group numbers and the intra-group serial numbers corresponding to the 4 data packets are all brand new, in this embodiment, it is assumed that the new group numbers corresponding to the 4 data packets are group N +1 (N can be understood as a positive integer greater than 3), and the intra-group serial numbers are 1, 2, 3, and 4, respectively. So that 4 data packets in the original group 3 can be retransmitted using the group N +1 and the sequence numbers 1, 2, 3, and 4 in the group.
The following system and apparatus are provided based on the same inventive concept as the first to third embodiments.
Example four
A fourth embodiment of the present invention provides a data transmission system, which may have a structure as shown in fig. 4, and includes an RLC layer receiving entity apparatus 11 and an RLC layer sending entity apparatus 12, where:
the RLC layer receiving entity apparatus 11 is configured to receive at least two data packets sent by the RLC layer sending entity apparatus, generate an acknowledgement identifier for the at least two data packets, where the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received, and send the acknowledgement identifier to the RLC layer sending entity apparatus;
the RLC layer sending entity apparatus 12 is configured to receive the acknowledgement identifier, allocate a latest sequence number to a data packet that is not correctly received according to the acknowledgement identifier, and continue to send the data packet with the sequence number within the sending window to the RLC layer receiving entity apparatus.
EXAMPLE five
An embodiment of the present invention provides an RLC layer sending entity apparatus, where the structure of the apparatus may be as shown in fig. 5, and the apparatus includes:
the receiving module 21 is configured to receive an acknowledgement identifier, where the acknowledgement identifier is generated uniformly for at least two data packets, and the acknowledgement identifier is used to indicate whether the at least two data packets are both received correctly;
the processing module 22 is configured to assign the latest sequence number to the data packet that is not correctly received according to the acknowledgement identifier, and continue to send the data packet with the sequence number within the sending window.
The processing module 22 is further configured to save the transmitted data packet in the retransmission data region while continuing to transmit the data packet with the sequence number within the transmission window.
When the acknowledgement flag indicates that the at least two data packets are correctly received, the processing module 22 allocates the latest sequence number to the data packet that is not correctly received according to the acknowledgement flag, and continues to send the data packet with the sequence number within the sending window, including:
clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area, and sending the data packet with the sequence number in the sending window.
When the acknowledgement flag indicates that none of the at least two data packets has been correctly received, the processing module 22 allocates the latest sequence number to the data packet that has not been correctly received according to the acknowledgement flag, and continues to send the data packet with the sequence number within the sending window, including:
and taking the latest sequence number as the sequence number of the data packet corresponding to the confirmation identifier, sending the data packet with the sequence number in a sending window, and clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area.
When the acknowledgement flag indicates that the at least two data packet portions are correctly received, the processing module 22 assigns a latest sequence number to the data packet that is not correctly received according to the acknowledgement flag, and continues to transmit the data packet with the sequence number within the transmission window, including:
and taking the latest sequence number as the sequence number of the data packet which is not correctly received in the data packet corresponding to the confirmation identifier, sending the data packet with the sequence number in a sending window, and clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area.
The processing module 22 sends the data packet with the sequence number within the sending window, including:
grouping the data packets with the serial numbers in the sending window, wherein each data group comprises at least two data packets, and sending the data packets marked by the group numbers of the group and the serial numbers in the group.
The processing module 22 is further configured to, when a status report is received, update the lower edge of the sending window to the next unsent data group if the status report includes the group number of the data group corresponding to the lower edge of the sending window.
The processing module 22 is further configured to start a retransmission timer after a data group is sent; and if the retransmission timer is overtime, retransmitting the data group, marking each data packet in the data group by using the serial number in the group and the latest group number, and updating the lower edge of the sending window to the next unsent data group.
EXAMPLE six
An embodiment of the present invention provides an RLC layer receiving entity apparatus, where the structure of the apparatus may be as shown in fig. 6, and the apparatus includes:
the receiving module 31 is configured to receive at least two data packets;
the generating module 32 is configured to uniformly generate an acknowledgement identifier for the at least two data packets, where the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received;
the sending module 33 is configured to send the acknowledgement identifier.
If the at least two data packets received by the receiving module 31 are all data packets in the same data group, the generating module 32 generates an acknowledgement identifier for the at least two data packets in a unified manner, including:
if the at least two data packets are correctly received, the generated confirmation identifier comprises a correct sending identifier and the group number of the data group;
if the at least two data packets are not correctly received, the generated confirmation identifier comprises an error sending identifier and the group number of the data group;
if the at least two data packet parts are correctly received, the generated confirmation identifier comprises a correct sending identifier, the group number of the data group and the in-group sequence number of the data packet which is not correctly received.
Based on the same inventive concept, embodiments of the present invention provide the following apparatus and medium.
EXAMPLE seven
A seventh embodiment of the present invention provides a data transmission device, where the structure of the device may be as shown in fig. 7, and the device includes a memory 41, a processor 42, a transceiver 43, and a bus interface; the processor 42 is configured to read the program in the memory 41, and execute:
receiving, by the transceiver 43, an acknowledgement flag, which is generated uniformly for at least two data packets and is used to indicate whether the at least two data packets are both received correctly; assigning the latest sequence number to the data packet which is not correctly received according to the confirmation identifier, and continuing to transmit the data packet with the sequence number in the transmission window through the transceiver 43; or, performing:
receiving at least two data packets by said transceiver 43; uniformly generating an acknowledgement identifier for the at least two data packets, wherein the acknowledgement identifier is used for indicating whether the at least two data packets are correctly received or not; the acknowledgement flag is transmitted by the transceiver 43.
Optionally, the processor 42 may specifically include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), one or more integrated circuits for controlling program execution, a hardware circuit developed by using a Field Programmable Gate Array (FPGA), or a baseband processor.
Optionally, the processor 42 may include at least one processing core.
Alternatively, the memory 41 may include a Read Only Memory (ROM), a Random Access Memory (RAM), and a disk memory. The memory 41 is used for storing data required by the at least one processor 42 during operation. The number of the memory 41 may be one or more.
An eighth embodiment of the present invention provides a nonvolatile computer storage medium, where the computer storage medium stores an executable program, and when the executable program is executed by a processor, the method provided in the first or second embodiment of the present invention is implemented.
In particular implementations, computer storage media may include: a Universal Serial Bus flash drive (USB), a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other storage media capable of storing program codes.
In the embodiments of the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the unit or the division of the unit is only one type of logical function division, and other division manners may be available in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.
The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be an independent physical module.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device, such as a personal computer, a server, or a network device, or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media that can store program codes, such as a universal serial bus flash drive (usb flash drive), a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, 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, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
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 (14)
1. A method of data transmission, the method comprising:
receiving an acknowledgement identifier, wherein the acknowledgement identifier is generated uniformly for at least two data packets, and the acknowledgement identifier is used for indicating whether the at least two data packets are received correctly;
and allocating the latest sequence number to the data packet which is not correctly received according to the confirmation identification, and continuously transmitting the data packet with the sequence number in the transmission window.
2. The method of claim 1, wherein the method further comprises:
and keeping the transmitted data packet in the retransmission data area while continuing to transmit the data packet with the sequence number in the transmission window.
3. The method of claim 2, wherein when the acknowledgement flag indicates that the at least two data packets are both correctly received, assigning a latest sequence number to the data packet that is not correctly received according to the acknowledgement flag, and continuing to transmit the data packet with the sequence number within the transmission window, comprises:
clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area, and sending the data packet with the sequence number in the sending window.
4. The method as claimed in claim 2, wherein when the ack flag indicates that none of the at least two data packets has been correctly received, assigning a latest sequence number to the data packet that has not been correctly received according to the ack flag, and continuing to transmit the data packet with the sequence number within the transmission window, comprises:
and taking the latest sequence number as the sequence number of the data packet corresponding to the confirmation identifier, sending the data packet with the sequence number in a sending window, and clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area.
5. The method of claim 2, wherein when the acknowledgment identification indicates that the at least two packet portions were received correctly, assigning a most recent sequence number to the packet that was not received correctly based on the acknowledgment identification, and continuing to transmit packets having sequence numbers within a transmission window, comprises:
and taking the latest sequence number as the sequence number of the data packet which is not correctly received in the data packet corresponding to the confirmation identifier, sending the data packet with the sequence number in a sending window, and clearing the data packet corresponding to the confirmation identifier stored in the retransmission data area.
6. The method of any of claims 3 to 5, wherein transmitting the data packet with the sequence number within the transmission window comprises:
grouping the data packets with the serial numbers in the sending window, wherein each data group comprises at least two data packets, and sending the data packets marked by the group numbers of the group and the serial numbers in the group.
7. The method of claim 6, wherein the method further comprises:
and when a status report is received, if the status report comprises the group number of the data group corresponding to the lower edge of the sending window, updating the lower edge of the sending window to the next unsent data group.
8. The method of claim 6, wherein the method further comprises:
starting a retransmission timer after a data group is sent;
and if the retransmission timer is overtime, retransmitting the data group, marking each data packet in the data group by using the serial number in the group and the latest group number, and updating the lower edge of the sending window to the next unsent data group.
9. A method of data transmission, the method comprising:
receiving at least two data packets;
uniformly generating an acknowledgement identifier for the at least two data packets, wherein the acknowledgement identifier is used for indicating whether the at least two data packets are correctly received or not;
sending the confirmation identification;
if the at least two data packets are correctly received, the generated confirmation identifier comprises a correct sending identifier and a group number of the data group;
if the at least two data packets are not correctly received, the generated confirmation identifier comprises an error sending identifier and the group number of the data group;
if the at least two data packet parts are correctly received, the generated confirmation identifier comprises a correct sending identifier, the group number of the data group and the in-group sequence number of the data packet which is not correctly received.
10. A data transmission system, characterized in that the system comprises a radio link layer control protocol, RLC, layer receiving entity means and an RLC layer transmitting entity means, wherein:
the RLC layer receiving entity apparatus is configured to receive at least two data packets sent by the RLC layer sending entity apparatus, generate an acknowledgement identifier for the at least two data packets in a unified manner, where the acknowledgement identifier is used to indicate whether the at least two data packets are all correctly received, and send the acknowledgement identifier to the RLC layer sending entity apparatus;
and the RLC layer sending entity device is used for receiving the confirmation identifier, distributing the latest sequence number to the data packet which is not correctly received according to the confirmation identifier, and continuously sending the data packet with the sequence number in the sending window to the RLC layer receiving entity device.
11. An apparatus of a radio link layer control protocol, RLC, layer transmitting entity, the apparatus comprising:
a receiving module, configured to receive an acknowledgement identifier, where the acknowledgement identifier is generated uniformly for at least two data packets, and the acknowledgement identifier is used to indicate whether the at least two data packets are both correctly received;
and the processing module is used for distributing the latest sequence number for the data packet which is not correctly received according to the confirmation identification and continuously sending the data packet with the sequence number in the sending window.
12. An apparatus of a radio link layer control protocol, RLC, layer receiving entity, the apparatus comprising:
the receiving module is used for receiving at least two data packets;
a generating module, configured to uniformly generate an acknowledgement identifier for the at least two data packets, where the acknowledgement identifier is used to indicate whether the at least two data packets are correctly received;
a sending module, configured to send the acknowledgement identifier;
wherein, if the at least two data packets received by the receiving module are all data packets in the same data group, the generating module generates the acknowledgement identifier for the at least two data packets in a unified manner, including:
if the at least two data packets are correctly received, the generated confirmation identifier comprises a correct sending identifier and the group number of the data group;
if the at least two data packets are not correctly received, the generated confirmation identifier comprises an error sending identifier and the group number of the data group;
if the at least two data packet parts are correctly received, the generated confirmation identifier comprises a correct sending identifier, the group number of the data group and the in-group sequence number of the data packet which is not correctly received.
13. A non-transitory computer storage medium storing an executable program for execution by a processor to perform the steps of the method of any one of claims 1 to 9.
14. A data transmission device comprising a memory, a processor, a transceiver, and a bus interface; the processor is used for reading the program in the memory and executing:
receiving, by the transceiver, an acknowledgement flag, which is generated uniformly for at least two data packets and is used to indicate whether the at least two data packets are both received correctly; according to the confirmation mark, distributing the latest sequence number for the data packet which is not correctly received, and continuously sending the data packet with the sequence number in the sending window through the transceiver; or, performing:
receiving, by the transceiver, at least two data packets; uniformly generating an acknowledgement identifier for the at least two data packets, wherein the acknowledgement identifier is used for indicating whether the at least two data packets are correctly received or not; transmitting, by the transceiver, the acknowledgement identification.
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