CN112702765A

CN112702765A - Data transmission method, device, equipment and storage medium

Info

Publication number: CN112702765A
Application number: CN202011527194.2A
Authority: CN
Inventors: 夏少华; 石峰
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-23
Anticipated expiration: 2040-12-22
Also published as: CN112702765B; WO2022134958A1

Abstract

An embodiment of the application provides a data transmission method, a device, equipment and a storage medium, wherein the method comprises the following steps: receiving a reconfiguration message; if the reconfiguration message comprises non-increment configuration indication information, caching a data packet cached on a Data Radio Bearer (DRB) resource, and releasing the DRB resource; and after the DRB is rebuilt, transmitting the buffered data packet. The method of the embodiment of the application cannot be lost on the layer surface of the wireless protocol stack, namely, the wireless protocol stack realizes lossless data transmission. And the delay is small compared to retransmitting the data packet through an upper layer or an application layer.

Description

Data transmission method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a data transmission method, a data transmission device, data transmission equipment and a storage medium.

Background

With the development of communication technology, New Radio (NR) systems are increasingly widely used. In the NR system, a non-incremental configuration full Config indication is often carried in a configuration message for performing cell handover or a first reconfiguration message after Radio Resource Control (RRC) connection re-establishment. After receiving the full Config instruction, the terminal device needs to first release all Data Radio Bearer (DRB) resources currently configured, and then reestablish the DRB according to the reconfiguration message.

In the related art, when releasing DRB resources, a Packet Data Convergence Protocol (PDCP) module releases all buffered Data packets, where the buffered Data packets include: service Data Units (SDUs) received from an upper layer but not yet submitted to the lower layer transmission, and SDUs that have been submitted to the lower layer transmission but have not yet received an acknowledgement of successful transmission from the lower layer. These discarded packets can only be retransmitted by upper layer Transmission Control Protocol (TCP)/IP or application layer, where the retransmission interval of the upper layer TCP/IP or application layer is generally in the order of seconds, which results in a large delay and a large impact on applications with sensitive delay.

Disclosure of Invention

The embodiment of the application provides a data transmission method, a data transmission device, data transmission equipment and a storage medium, so as to reduce the delay of data packet transmission.

In a first aspect, an embodiment of the present application provides a data transmission method, including:

receiving a reconfiguration message;

if the reconfiguration message comprises non-increment configuration indication information, caching a data packet cached on a Data Radio Bearer (DRB) resource, and releasing the DRB resource;

and after the DRB is rebuilt, transmitting the buffered data packet.

In one possible implementation, the receiving the reconfiguration message includes:

receiving the reconfiguration message through a Radio Resource Control (RRC) layer.

In a possible implementation manner, the caching the data packet cached on the DRB resource and releasing the DRB resource includes:

sending first indication information to a Packet Data Convergence Protocol (PDCP) layer through the RRC layer, wherein the first indication information is used for indicating the PDCP layer to cache the data packet cached on the DRB resource and release the DRB resource;

and caching the data packet cached on the DRB resource according to the first indication information through the PDCP layer, and releasing the DRB resource.

In a possible implementation manner, the caching the data packet cached on the DRB resource includes:

establishing an incidence relation between the data packet cached on the DRB resource and an evolved packet system bearer identifier ID or a protocol data unit PDU session identifier ID;

and caching the data packet cached on the DRB resource according to the incidence relation between the data packet and the bearing identification ID of the evolution grouping system or the PDU conversation identification ID.

In one possible implementation manner, the transmitting the buffered data packet includes:

acquiring the cached data packet according to the incidence relation between the data packet and an evolved packet system bearer identifier ID or a PDU session identifier ID;

and transmitting the buffered data packet.

In one possible implementation, the method further includes:

sending a notification message to the RRC layer through the PDCP layer, wherein the notification message is used for indicating that the DRB resources are released;

sending second indication information to the PDCP layer through the RRC layer according to the reconfiguration message, wherein the second indication information is used for indicating the PDCP layer to rebuild the DRB;

and reconstructing a DRB according to the second indication information through the PDCP layer.

In a possible implementation manner, the reconfiguration message is a configuration message for performing cell handover or a reconfiguration message after RRC connection reestablishment.

In a second aspect, an embodiment of the present application provides a data transmission apparatus, including:

a receiving module, configured to receive a reconfiguration message;

a processing module, configured to cache a data packet cached on a data radio bearer DRB resource and release the DRB resource if the reconfiguration message includes non-incremental configuration indication information;

and the sending module is used for transmitting the cached data packet after the DRB is rebuilt.

In a possible implementation manner, the receiving module is specifically configured to:

In a possible implementation manner, the processing module is specifically configured to:

establishing an incidence relation between the data packet cached on the DRB resource and an EPS bearing identification ID or a protocol data unit PDU session identification ID;

and caching the data packet cached on the DRB resource according to the incidence relation between the data packet and an EPS bearing identification ID or a PDU conversation identification ID of an evolution grouping system.

In a possible implementation manner, the generating module is specifically configured to:

acquiring the cached data packet according to the incidence relation between the data packet and an EPS bearing ID or a PDU session ID of an evolution packet system;

and transmitting the buffered data packet.

In one possible implementation, the processing module is further configured to:

In a third aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method of any one of the first aspect.

In a fourth aspect, an embodiment of the present application provides an electronic device, including:

a processor; and

a memory for storing executable instructions of the processor;

wherein the processor is configured to perform the method of any of the first aspects via execution of the executable instructions.

In a fifth aspect, the present application provides a computer program product comprising a computer program that, when executed by a processor, implements the method according to any one of the first aspect.

The data transmission method, the device, the equipment and the storage medium provided by the embodiment of the application receive the reconfiguration message; if the reconfiguration message comprises the non-increment configuration indication information, caching the data packet cached on the data radio bearer DRB resource and releasing the DRB resource; after the DRB is rebuilt, the cached data packet is transmitted, so that packet loss does not occur on the layer surface of the wireless protocol stack when the DRB resource is released, namely the wireless protocol stack can realize lossless data transmission; and the delay is small compared to retransmitting the data packet through an upper layer or an application layer.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application;

fig. 2 is a schematic flowchart of an embodiment of a data transmission method provided in the present application;

fig. 3 is an interaction flow diagram of an embodiment of a data transmission method provided in the present application;

fig. 4 is an interaction flow diagram of another embodiment of a data transmission method provided in the present application;

FIG. 5 is a schematic structural diagram of an embodiment of a data transmission apparatus provided in the present application;

fig. 6 is a schematic structural diagram of an embodiment of an electronic device provided in the present application.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

First, a part of vocabularies and application scenarios related to the present application are introduced:

the non-incremental configuration full Config refers to a non-incremental configuration mode, that is, the network device side does not perform incremental configuration based on the current configuration, but directly provides a complete set of configuration.

The terminal device in the embodiment of the present application may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device (terminal equipment), a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device in the present application may be a Base Transceiver Station (BTS) in Global System for Mobile communication (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved NodeB (eNB) in Long Term Evolution (LTE) or enhanced Long Term Evolution (LTE), a next-generation evolved NodeB (next generation evolved node b), an Access Point (AP, AP) or a relay Station in WLAN, a gbb in 5G NR, a gsb in future communication network, and the like.

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application, and the technical solution provided by the present application is based on the network architecture shown in fig. 1, where the network architecture includes at least one terminal device 100, and communicates with a network device 200 through a wireless interface, and for clarity, only one terminal device and one network device are shown in fig. 1.

In the NR system, a non-incremental configuration full Config indication is often carried in a configuration message for performing cell handover or a first reconfiguration message after Radio Resource Control (RRC) connection re-establishment. After receiving the full Config instruction, the terminal device needs to first release all Data Radio Bearer (DRB) resources currently configured, and then reestablish the DRB according to the reconfiguration message.

The application layer retransmission generally needs to wait until the network device side sends a retransmission instruction or does not receive feedback of the network device side within a preset time length and then retransmits, so that the time delay is large, and the user experience is seriously influenced.

According to the method, if the reconfiguration message comprises the non-increment configuration indication information, caching the data packet cached on the data radio bearer DRB resource, and releasing the DRB resource; after the DRB is rebuilt, the cached data packet is transmitted, so that packet loss does not occur on the layer surface of the wireless protocol stack when the DRB resource is released, namely the wireless protocol stack can realize lossless data transmission; the delay for retransmitting packets is in the order of milliseconds, while the delay for retransmitting packets through the upper or application layer is in the order of seconds, and thus is less than if the packets were retransmitted through the upper or application layer.

The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 2 is a schematic flowchart of an embodiment of a data transmission method provided in the present application. As shown in fig. 2 and fig. 3, the method provided by this embodiment includes:

step 101, receiving a reconfiguration message.

Specifically, the terminal device receives a reconfiguration message sent by the network device side.

In an embodiment, the reconfiguration message is a configuration message for performing cell handover or a reconfiguration message after RRC connection reestablishment.

And step 102, if the reconfiguration message comprises the non-increment configuration indication information, caching the data packet cached on the data radio bearer DRB resource and releasing the DRB resource.

Specifically, for the scenario of DRB resource release caused by full Config, in the related art, the DRB resource is released, and the data packet cached on the DRB resource is discarded, but in the embodiment of the present application, the data packet cached on the DRB resource is cached, and the DRB resource is released.

Wherein, the data packet of buffering includes: SDUs received from an upper layer but not yet submitted to the bottom layer transmission, and SDUs that have been submitted to the bottom layer transmission but have not yet received an acknowledgement of successful transmission from the bottom layer.

And 103, transmitting the cached data packet after the DRB is reconstructed.

Specifically, after the DRB is reestablished, the cached data packet is preferentially retransmitted, so that packet loss does not occur at the layer of the radio protocol stack when the DRB resource is released, that is, the radio protocol stack performs lossless data transmission. Because DRB resources are released and rebuilt according to the signaling of the same reconfiguration message, the stored data packet is transmitted after the rebuild, the delay is generally millisecond-level, and the delay is smaller compared with the process of retransmitting the data packet through an upper layer or an application layer.

The method of the embodiment receives a reconfiguration message; if the reconfiguration message comprises the non-increment configuration indication information, caching the data packet cached on the data radio bearer DRB resource and releasing the DRB resource; after the DRB is rebuilt, the cached data packet is transmitted, so that packet loss does not occur on the layer surface of the wireless protocol stack when the DRB resource is released, namely the wireless protocol stack can realize lossless data transmission; and the delay is small compared to retransmitting the data packet through an upper layer or an application layer.

On the basis of the above embodiment, step 101 may be implemented as follows:

Specifically, the radio resource control RRC layer receives the reconfiguration message, and if the reconfiguration message carries the non-incremental configuration full Config indication information, instructs the PDCP layer to maintain the data packet buffered on the DRB resource when notifying the PDCP layer to release the DRB resource.

In one embodiment, as shown in fig. 4, step 102 may be implemented as follows:

sending first indication information to a Packet Data Convergence Protocol (PDCP) layer through the RRC layer, wherein the first indication information is used for indicating the PDCP layer to cache a data packet cached on a DRB resource and release the DRB resource;

Specifically, the RRC layer receives the reconfiguration message, and if the reconfiguration message carries non-incremental configuration full Config indication information, sends first indication information to the PDCP layer through the RRC layer, where the first indication information is used to indicate the PDCP layer to cache a data packet cached in the DRB resource when the DRB resource is released. Wherein, the cached data comprises: PDCP receives SDUs from an upper layer that were not submitted for transmission by the bottom layer, and SDUs that have been submitted for transmission by the bottom layer but have not received an acknowledgement of successful transmission from the bottom layer.

And the PDCP layer caches the data packet cached on the DRB resource and releases the DRB resource.

In the above embodiment, the RRC layer sends the first indication information to the PDCP layer, and the PDCP layer is instructed to cache the data packet cached in the DRB resource when releasing the DRB resource, so that the implementation process is simple.

In an embodiment, the step of "caching the data packets cached on the DRB resource" may be implemented as follows:

establishing an association relation between a Data Packet cached on the DRB resource and an Evolved Packet System (EPS) bearing identification ID or a Protocol Data Unit (PDU) session identification ID;

Specifically, if the current network is a Non-independent (NSA) networking network, that is, an LTE system, the PDCP layer establishes an association relationship between a data packet and an EPS bearer ID; if the current network is an independent (SA) networking network, i.e. a 5G system, the PDCP layer establishes an association between a packet and a PDU session ID.

The EPS bearer is a bearer from the terminal equipment to the core network. The 5G network refers to a path established between the terminal device and the external network as a PDU Session (Session).

The PDCP firstly stores the data packet cached on the DRB resource according to the first indication information of the RRC layer, and establishes an association relationship between the stored data packet and the EPS bearing ID associated with the DRB resource or establishes an association relationship between the stored data packet and the PDU conversation ID associated with the DRB resource. And then release the DRB resources.

In one embodiment, step 103 may be implemented as follows:

acquiring a cached data packet according to the incidence relation between the data packet and an evolved packet system bearing identification ID or a PDU session identification ID;

and transmitting the buffered data packet.

Specifically, after the DRB is reconstructed, the associated data packet is found according to the EPS bearer ID or PDU session ID associated with the reconstructed DRB and the association relationship, and the buffered data packet is transmitted.

In the above embodiment, when the data packet is cached, the association relationship between the data packet cached on the DRB resource and the EPS bearer ID or the PDU session ID is established, and after the DRB is reestablished, the stored data packet can be quickly found according to the association relationship, so that transmission is performed with high efficiency and small delay.

In an embodiment, the method further comprises:

Specifically, the PDCP layer notifies the RRC layer that the DRB resource release is completed, for example, sends a notification message, where the notification message is used to indicate that the DRB resource release is completed.

And after receiving the notification message of the completion of the release of the PDCP layer, the RRC layer notifies the PDCP layer to reestablish the DRB according to the reconfiguration message, namely, second indication information is sent to the PDCP layer, and the second indication information is used for indicating the PDCP layer to reestablish the DRB.

And the PDCP layer reestablishes the DRB according to the second indication information, finds out the stored data packets according to the EPS bearing ID or the PDU conversation ID associated with the DRB and the association relation, and preferentially transmits the data packets. And sending the newly received data packet from the upper layer after the data packet transmission is completed.

In one embodiment, the data transmission method comprises the following steps:

step 1, receiving the reconfiguration message through a Radio Resource Control (RRC) layer;

step 2, if the reconfiguration message includes non-incremental configuration indication information, sending first indication information to a Packet Data Convergence Protocol (PDCP) layer through the RRC layer, wherein the first indication information is used for indicating the PDCP layer to cache the data packet cached on the DRB resource and releasing the DRB resource;

step 3, establishing the association relation between the data packet cached on the DRB resource and the bearing identification ID of the evolution packet system or the conversation identification ID of the Protocol Data Unit (PDU) through the PDCP layer according to the first indication information;

step 4, caching the data packet cached on the DRB resource according to the incidence relation between the data packet and the bearing identification ID of the evolution grouping system or the PDU conversation identification ID;

step 5, releasing the DRB resource;

step 6, sending a notification message to the RRC layer through the PDCP layer, wherein the notification message is used for indicating that the DRB resources are released;

step 7, sending second indication information to the PDCP layer through the RRC layer according to the reconfiguration message, where the second indication information is used to indicate the PDCP layer to rebuild DRBs;

step 8, reconstructing a DRB through the PDCP layer according to the second indication information;

step 9, obtaining the cached data packet according to the incidence relation between the data packet and the bearing identification ID of the evolution grouping system or the PDU conversation identification ID;

step 10, transmitting the buffered data packet

In the method of this embodiment, if the reconfiguration message includes the non-incremental configuration indication information, the PDCP layer buffers the data packet buffered in the DRB resource of the data radio bearer, and releases the DRB resource; after the DRB is rebuilt, the buffered data packet is transmitted through the PDCP layer, so that the packet loss can not occur on the surface of the wireless protocol stack layer when the DRB resource is released, namely, the wireless protocol stack can realize lossless data transmission; the delay for retransmitting packets is in the order of milliseconds, while the delay for retransmitting packets through the upper or application layer is in the order of seconds, and thus is less than if the packets were retransmitted through the upper or application layer.

Fig. 5 is a schematic structural diagram of an embodiment of a data transmission device provided in the present application, and as shown in fig. 5, the data transmission device of the present embodiment includes:

a receiving module 110, configured to receive a reconfiguration message;

a processing module 111, configured to, if the reconfiguration message includes non-incremental configuration indication information, cache a data packet cached on a data radio bearer DRB resource, and release the DRB resource;

a sending module 112, configured to transmit the buffered data packet after reconstructing the DRB.

In a possible implementation manner, the receiving module 110 is specifically configured to:

In a possible implementation manner, the processing module 111 is specifically configured to:

In one possible implementation, the generating module 112 is specifically configured to:

and transmitting the buffered data packet.

In a possible implementation manner, the processing module 111 is further configured to:

The apparatus of this embodiment may be configured to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.

Fig. 6 is a schematic structural diagram of an embodiment of an electronic device provided in the present application, and as shown in fig. 6, the electronic device includes:

a processor 210, and a memory 211 for storing executable instructions for the processor 210.

Optionally, the method may further include: a communication interface 212 for enabling communication with other devices.

The above components may communicate over one or more buses.

The processor 210 is configured to execute the corresponding method in the foregoing method embodiment by executing the executable instruction, and the specific implementation process of the method may refer to the foregoing method embodiment, which is not described herein again.

The embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method in the foregoing method embodiment is implemented.

An embodiment of the present application further provides a computer program product, including a computer program, where the computer program is executed by a processor to implement the method according to any one of the foregoing method embodiments, and specific implementation processes thereof may refer to the foregoing method embodiments, which implement similar principles and technical effects, and are not described herein again.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method of data transmission, comprising:

receiving a reconfiguration message;

and after the DRB is rebuilt, transmitting the buffered data packet.

2. The method of claim 1, wherein receiving the reconfiguration message comprises:

3. The method of claim 2, wherein the buffering the data packets buffered on the Data Radio Bearer (DRB) resource and releasing the DRB resource comprises:

4. The method of any of claims 1-3, wherein buffering the data packets buffered on the DRB resource comprises:

5. The method of claim 4, wherein transmitting the buffered data packets comprises:

and transmitting the buffered data packet.

6. The method of claim 2 or 3, further comprising:

sending a notification message to the RRC layer through the PDCP layer, wherein the notification message is used for indicating that the DRB resources are released and completed;

7. The method according to any of claims 1-3, wherein the reconfiguration message is a configuration message for performing a cell handover or a reconfiguration message after RRC connection reestablishment.

8. A data transmission apparatus, comprising:

a receiving module, configured to receive a reconfiguration message;

9. An electronic device, comprising:

a processor, a memory, an interface to communicate with other devices;

the memory stores computer-executable instructions;

the processor executes computer-executable instructions stored by the memory, causing the processor to perform the data transfer method of any of claims 1 to 7.

10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, are configured to implement the data transmission method of any one of claims 1 to 7.

11. A computer program product comprising a computer program, characterized in that the computer program realizes the method according to any of claims 1-7 when executed by a processor.