CN113950100B - Data transmission method, device, electronic equipment and medium - Google Patents
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Abstract
The present disclosure relates to a data transmission method, apparatus, electronic device, and medium; wherein the method comprises the following steps: responding to feedback information of channel quality of a wireless link in a preset period of time, and determining the quality of the wireless link; determining the use state of a PDCP copying function of a packet data convergence protocol according to the quality of the wireless link; transmitting target data from a protocol upper stack point to a protocol lower stack point based on the use state of the PDCP copying function, wherein the PDCP copying function is used for copying the target data. The method and the device can avoid the problem that the data redundancy is large because the PDCP copying function is always started to copy the transmission data and the transmission is carried out through each protocol upper stack point, thereby effectively reducing the resource consumption of the data transmission.
Description
Technical Field
The disclosure relates to the technical field of data transmission, and in particular relates to a data transmission method, a data transmission device, electronic equipment and a medium.
Background
In the field of mobile communication technology, reliability of data transmission is particularly important, and application of packet data convergence protocol (Packet Data Convergence Protocol, PDCP) duplication is important in the field of data transmission. Before data transmission, the data to be transmitted can be duplicated into two parts by PDCP duplication, and the data are respectively sent to the protocol lower stack point through wireless links where the two protocol upper stack points are located, so that the protocol lower stack point deletes one part of the received two parts of data according to the received two parts of data, and finally one part of data is reserved for storage and use.
However, in the prior art, each protocol upper stack point transmits the same data to the protocol lower stack point, so that the redundancy of the data in the data transmission process is higher, and the resource consumption of the data transmission is increased.
Disclosure of Invention
In order to solve the technical problems described above or at least partially solve the technical problems described above, the present disclosure provides a data transmission method, apparatus, electronic device, and medium.
In a first aspect, this embodiment provides a data transmission method, including:
responding to feedback information of channel quality of a wireless link in a preset period of time, and determining the quality of the wireless link;
determining the use state of a PDCP copying function of a packet data convergence protocol according to the quality of the wireless link;
transmitting target data from a protocol upper stack point to a protocol lower stack point based on the use state of the PDCP copying function, wherein the PDCP copying function is used for copying the target data.
Optionally, the quality of the wireless link includes a block error rate of the wireless link;
the determining the use state of the PDCP copy function according to the quality of the radio link includes:
judging whether the block error rate of the wireless link is larger than a preset threshold value or not;
If yes, determining that the use state of the PDCP copy function is on;
if not, determining that the use state of the PDCP copy function is closed.
Optionally, the number of the upper stack points of the protocol is at least two;
the transmitting the target data from the upper stack point to the lower stack point based on the use state of the PDCP copy function includes:
determining the use state of the PDCP copying function as closed, and selecting a protocol upper stack point with the highest priority as a main stack point; the priority of each protocol upper stack point is determined according to the block error rate of the wireless link where the protocol upper stack point is located;
and transmitting the target data to a protocol lower stack point through the wireless link corresponding to the main stack point.
Optionally, the method further comprises:
taking the rest upper stack points of the protocol as auxiliary stack points; caching target data into the auxiliary stack point;
and in the process that the target data is transmitted to a protocol lower stack point through the wireless link corresponding to the main stack point, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is received, transmitting a transmission instruction of the target data to the auxiliary stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point.
Optionally, the method further comprises:
after the target data is transmitted to a protocol lower stack point through the wireless link corresponding to the main stack point, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is not received, deleting the target data cache from the auxiliary stack point.
Optionally, the method further comprises:
and after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point, the transmission task of the main stack point for transmitting the target data is canceled.
Optionally, the transmitting the target data from the upper stack point to the lower stack point based on the usage status of the PDCP copy function includes:
determining the use state of the PDCP copying function as on, copying and distributing target data to each protocol upper stack point based on the PDCP copying function;
and transmitting the target data to a protocol lower stack point through a wireless link corresponding to each protocol upper stack point, so that the protocol lower stack point performs de-duplication operation on at least two received target data to obtain one target data.
In a second aspect, the present embodiment provides a data transmission apparatus, including:
The determining module is used for responding to feedback information of the channel quality of the wireless link in a preset period of time and determining the quality of the wireless link;
the determining module is further used for determining the use state of the PDCP copying function of the packet data convergence protocol according to the quality of the wireless link;
and the transmission module is used for transmitting the target data from the upper protocol stack point to the lower protocol stack point based on the use state of the PDCP copying function, and the PDCP copying function is used for copying the target data.
Optionally, the quality of the wireless link includes a block error rate of the wireless link;
the determining module is specifically configured to:
judging whether the block error rate of the wireless link is larger than a preset threshold value or not;
if yes, determining that the use state of the PDCP copy function is on;
if not, determining that the use state of the PDCP copy function is closed.
Optionally, the number of the upper stack points of the protocol is at least two;
the transmission module is specifically used for:
determining the use state of the PDCP copying function as closed, and selecting a protocol upper stack point with the highest priority as a main stack point; the priority of each protocol upper stack point is determined according to the block error rate of the wireless link where the protocol upper stack point is located;
And transmitting the target data to a protocol lower stack point through the wireless link corresponding to the main stack point.
Optionally, the method further comprises: a buffer module and a sending module;
the buffer module is used for taking the rest protocol upper stack points as auxiliary stack points; caching target data into the auxiliary stack point;
and the sending module is used for sending a transmission instruction of the target data to the auxiliary stack point if receiving feedback information of channel quality deterioration of the wireless link corresponding to the main stack point in the process that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point.
Optionally, the method further comprises: deleting the module;
and the deleting module is used for deleting the target data cache from the auxiliary stack point if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is not received after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point.
Optionally, the method further comprises: a revocation module;
and the revocation module is used for revokeing the transmission task of the main stack point for transmitting the target data after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point.
Optionally, the transmission module is specifically configured to:
determining the use state of the PDCP copying function as on, copying and distributing target data to each protocol upper stack point based on the PDCP copying function;
and transmitting the target data to a protocol lower stack point through a wireless link corresponding to each protocol upper stack point, so that the protocol lower stack point performs de-duplication operation on at least two received target data to obtain one target data.
In a third aspect, the present embodiment further provides an electronic device, including:
one or more processors;
storage means for storing one or more programs,
when the one or more programs are executed by the one or more processors, the one or more processors implement the data transmission method according to any one of the embodiments of the present invention.
In a fourth aspect, the present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements any of the data transmission methods of the embodiments of the present invention.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages: and acquiring the channel quality of the wireless link by responding to the feedback information of the channel quality of the wireless link, determining the use state of the packet data convergence protocol copying function based on the quality of the wireless link, and transmitting target data from a protocol upper stack point to a protocol lower stack point by referring to the use state of the packet data convergence protocol copying function. The problem of high data redundancy caused by always starting a packet data convergence protocol replication function to replicate target data to be transmitted and transmitting the target data through each protocol upper stack point is avoided, and therefore the resource consumption of data transmission is effectively reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the disclosure;
fig. 2 is a flow chart of another data transmission method according to an embodiment of the disclosure;
fig. 3 is a flowchart of yet another data transmission method according to an embodiment of the disclosure;
fig. 4 is a flowchart of yet another data transmission method according to an embodiment of the disclosure;
fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.
The third generation partnership project (3rd Generation Partnership Project,3GPP) is a standardized organization for implementing wireless interfaces. The fifth generation mobile communication (5G) standardized by 3GPP is intended to support multiple service scenarios, each with different quality of service requirements. Wherein, the service scene can be divided into: enhanced mobile broadband (emmbb), large-scale machine type communication (mctc), and Ultra Reliable Low Latency Communication (URLLC). In ultra-reliable low latency communications, the quality of service requirement includes 10 -5 Block error rate of (1 ms) and a transmission delay of 1 ms.
The New Radio (NR) standard product of 3GPP can overcome the limitations of the conventional long term evolution (Long Term Evolution, LTE), and features that a more flexible transmission time interval structure is redesigned and the processing time is reduced, so as to meet the requirements of low latency and high reliability.
To improve the reliability of data transmission, NR proposes packet data convergence protocol (Packet Data Convergence Protocol, PDCP) duplication. The PDCP duplication mainly includes two types: dual connectivity (Dual Connectivity, DC) replication and carrier aggregation (Carrier Aggregation, CA) replication.
For the data transmitting end, whether DC copy or CA copy, the same PDCP protocol data unit (Protocol Data Unit, PDU) needs to be copied into two identical PDCP PDUs by the PDCP layer and sent to the radio link control (Radio Link Control, RLC) layers of two different links, so that the two identical PDCP PDUs perform data transmission through the multimedia access control (Media Access Control, MAC) layers of two different links or the same MAC layer, respectively.
For the data receiving end, when the PDCP layer receives two identical PDCP PDUs, one PDCP PDU needs to be deleted, and only one PDCP PDU is reserved.
In the prior art, the same PDCPDU is copied into two identical PDCP PDUs and is issued to two different links for data transmission, so that the reliability of data transmission is improved. However, such reliability gain may result in capacity reduction due to transmission of redundant data, thus limiting the size of the transmitted data and increasing the consumption of resources.
Based on this, in order to solve the above-described problems, the present embodiment adopts an efficient data replication method for resource priority so as not to waste resources. Acquiring the channel quality of the wireless link by responding to the feedback information of the channel quality of the wireless link, determining the use state of the packet data convergence protocol copying function based on the quality of the wireless link, and transmitting target data from a protocol upper stack point to a protocol lower stack point by referring to the use state of the packet data convergence protocol copying function; the problem of high data redundancy caused by always starting a packet data convergence protocol replication function to replicate target data to be transmitted and transmitting the target data through each protocol upper stack point is avoided, and therefore the resource consumption of data transmission is effectively reduced.
Fig. 1 is a flow chart of a data transmission method applied to a data transmitting end according to the present embodiment. The embodiment is applicable to the case of effectively transmitting data. The method of the present embodiment may be performed by a data transmission device, which may be implemented in hardware and/or software, and may be configured in an electronic apparatus. The data transmission method described in any embodiment of the present application may be implemented. As shown in fig. 1, the method specifically includes the following steps:
s110, responding to feedback information of the channel quality of the wireless link in a preset period, and determining the quality of the wireless link.
The terminal equipment which performs communication transmission with the base station can detect the channel quality of the wireless link in real time, and feeds back the detected channel quality of the wireless link to the base station, so that the base station can conveniently determine the quality of the wireless link based on feedback information of the channel quality of the wireless link.
The quality of the wireless link may be characterized by using various data, specifically, block error rate (BLER), signal-to-noise ratio (SNR), signal-to-interference-and-noise ratio (SINR), reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ), received Signal Strength Indicator (RSSI), channel Quality Indicator (CQI), channel State Information (CSI), bit Error Rate (BER), etc. In particular, the quality of the wireless link may be characterized by one or more of the above-mentioned data.
In some embodiments, the quality of the wireless link may be characterized by a block error rate of the wireless link. The feedback information of the channel quality of the radio link may be a data reception signal, such as an acknowledgement signal (ACK) or a non-acknowledgement signal (NACK). The block error rate of the wireless link in the preset period can be calculated according to the number of the acknowledgement signals and the non-acknowledgement signals included in the feedback information.
The block error rate refers to the average error rate of the transmission block after being checked by a cyclic redundancy check code (Cyclic Redundancy Check, CRC), and can effectively reflect an important index of network performance service quality of a wireless link. The block error rate can be calculated by the following formula:
wherein BLER is block error rate, A NACK A is the number of NACK in the preset time period (NACK+ACK) Is the sum of the number of NACK and ACK in a preset period.
It should be noted that, the preset period may be set periodically by the terminal device, or may be agreed with the detection time according to an agreement with the base station. The specific values of the preset time period are not limited in the present disclosure.
S120, determining the use state of the PDCP copying function of the packet data convergence protocol according to the quality of the wireless link.
When data is transmitted, the data to be transmitted can be effectively transmitted directly through the wireless link with better channel quality without adopting a PDCP copying function to copy the data to be transmitted.
The PDCP copy function may be turned on or off, and when the PDCP copy function is turned on, the PDCP copy function may be used to copy data to be transmitted. When the use state of the PDCP copying function is closed, the PDCP copying function may not be used to copy the data to be transmitted, so as to reduce redundancy of data transmission.
The usage status of the PDCP copy function can be set by means of a calibration field to be illustrated by a field PDCP-indication implementation as an example.
The PDCP copy function is turned off when the PDCP-duplex field in the PDCP-Config is configured as false, and turned on when the PDCP-duplex field in the PDCP-Config is configured as true. See table 1 below for an exemplary illustration.
Table 1 PDCP copy activated/deactivated MAC CE
| D 7 | D 6 | D 5 | D 4 | D 3 | D 2 | D 1 | D 0 |
Wherein the validation may be by base station configuration. The MAC CE contains bitmap information, D i A field for indicating a data radio bearer i (DRB i ) An activation/deactivation state of PDCP copying of a total of 8 bits, 1 byte, wherein i (value from 0 to 7) is configured with PDCP copying andascending order of DRB IDs of DRBs of the RLC entity associated with the MAC device. D (D) i Setting the field to 1 indicates DRB i Is activated; d (D) i Setting the field to 0 indicates DRB i Is deactivated.
When DRB is in i After the PDCP duplication of (c) is activated, the PDCP layer duplicates the data and sends two identical PDCP PDUs to RLC1 and RLC2, respectively. Both RLC entities cannot recognize whether the transmitted data is identical, but send the data to the MAC layer, respectively, as is the normal case.
When DRB is in i After the PDCP duplication deactivation of the two different frequency points, the carriers no longer correspond to the two different RLC entities, the PDCP layer no longer duplicates the data, which is then transmitted through the main RLC entity. Meanwhile, the PDCP layer informs the auxiliary RLC entity of deleting the data buffer in the auxiliary logic link.
The PDCP copying is configured with a resource Block (e.g., data Block (RB)) as granularity, and when an RRC parameter is configured, the PDCP-copying is activated when a PDCP-copying field in the PDCP-Config is configured as true, and all data in the RB is to be copied.
Wherein, the MAC CE is adopted to indicate whether the DRB activates PDCP duplication, and the PDCP duplication function of 8 DRBs is supported at most. If D i The field set to 1 indicates DRB i Is activated, both logical links transmit data; if D i The field set to 0 indicates DRB i The PDCP layer no longer duplicates the data, which will then be transmitted over the primary logical link (e.g., the radio link where the primary stack point is located).
S130, transmitting the target data from the upper stack point to the lower stack point based on the using state of the PDCP copying function.
Wherein, the PDCP copy function is used for copying the target data.
The protocol upper stack point can be an RLC entity for data transmission in the base station, and the protocol lower stack point can be a terminal device for receiving data, so as to realize data interaction between the base station and the terminal device.
The application in the base station, the upper stack point of the protocol is a transmitting end, the lower stack point of the protocol is a receiving end, the upper stack point of the protocol and the lower stack point of the protocol can be the same base station, or different entities of the same base station, or entities of different base stations, so as to realize data transmission among the entities of the base station and among the base stations.
It should be noted that, the RLC entity provided in the base station may be one or more to facilitate efficient transmission of the target data. The specific value of the number of RLC entities may be set with reference to the capacity of transmission data, which is not limited by the present disclosure.
According to the data transmission method disclosed by the embodiment, the channel quality of the wireless link is obtained by responding to the feedback information of the channel quality of the wireless link, so that the quality of the wireless link is determined, the use state of the packet data convergence protocol copy function is determined based on the quality of the wireless link, and the target data is transmitted from the protocol upper stack point to the protocol lower stack point by referring to the use state of the packet data convergence protocol copy function. The problem of high data redundancy caused by always starting a packet data convergence protocol replication function to replicate target data to be transmitted and transmitting the target data through each protocol upper stack point is avoided, and therefore the resource consumption of data transmission is effectively reduced.
Fig. 2 is a flow chart of another data transmission method according to the present embodiment. The embodiment is based on the above embodiment, wherein the quality of the wireless link may be a block error rate of the wireless link; one possible implementation of S120 is as follows:
s12011, judging whether the block error rate of the wireless link is larger than a preset threshold value; if not, determining that the use state of the PDCP copy function is closed.
The preset threshold is a critical reference value for judging the block error rate of the wireless link. The specific setting of the numerical value can be performed according to different service requirements, and the specific numerical value of the preset threshold is not limited in the disclosure.
It should be noted that the present embodiment focuses on ultra-reliable low-latency communication service, and in general, the value of the threshold is presetCan be set to 10 in size -5 。
If the block error rate of the wireless link is larger than the preset threshold value, determining that the use state of the PDCP copy function is on.
When the block error rate of the wireless link is detected to be smaller than or equal to a preset threshold value, the channel quality of the wireless link is higher, at the moment, the target data to be transmitted can be copied without a PDCP copying function, the effective transmission of the data can be realized by adopting one wireless link, and the using state of the PDCP copying function can be set to be closed.
Therefore, the problem of higher data redundancy in the data transmission process caused by the fact that a plurality of wireless links are used for transmitting the same data is avoided.
In addition, the number of the protocol upper stack points may be at least two, and referring to the description of the above embodiment, two or more RLC entities may be set, and when data transmission is performed, a radio link corresponding to one RLC entity of the two or more RLC entities is selected for performing transmission of target data.
Further, one possible implementation of S130 is as follows:
S13011, selecting the protocol upper stack point with the highest priority as the main stack point.
The priority of each protocol upper stack point is determined according to the block error rate of the wireless link where the protocol upper stack point is located.
In this embodiment, an RLC entity is exemplified as a protocol upper stack point. The priority of each RLC entity may be prioritized according to the block error rate of the radio link in which the RLC entity is located, to distinguish the priority order between each RLC entity.
For example, the protocol upper stack point includes RLC1 and RLC2. If the block error rate of the radio link where RLC1 is located is smaller than the block error rate of the radio link where RLC2 is located, RLC1 may be set as a high priority device, a logical channel priority field (PHY priority) corresponding to RLC1 is set to 1, RL2 is set as a low priority device, and a priority field corresponding to RLC2 is set to 0.
It should be noted that, the main stack point selected in this embodiment may be a stack point for performing the target data transmission, or may not be a stack point for performing the target data transmission. When the channel quality is degraded in the transmission process, other auxiliary stack points can be replaced to replace the auxiliary stack points to transmit target data.
In addition, before the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point, the MAC CEs activated/deactivated by the RLC can be duplicated through the configuration of the PDCP so as to effectively identify the PDCP duplication function of a plurality of RLC entities.
Table 2 PDCP duplicates RLC activated/deactivated MAC CEs
| DRB ID | RLC 2 | RLC 1 | RLC 0 |
Table 2 is PDCP duplicate RLC activated/deactivated MAC CE, which is validated by base station configuration. The MAC CE contains bitmap information, and a DRB ID field represents a DRB identifier applied by the MAC CE, and the length of the field is 5 bits. Wherein the RLC 2 The field indicates PDCP copy activation/deactivation status of RLC entity 2, where 2 is the ascending order of logical channel IDs of the secondary RLC entity of the DRB, in order of MCG and SCG. RLC (radio link control) 2 Setting the field to 1 indicates that PDCP duplication of RLC entity 2 will be activated, RLC 2 A field set to 0 indicates that PDCP duplication of RLC entity 2 is to be disabled.
And S13012, transmitting the target data to a protocol lower stack point through a wireless link corresponding to the main stack point.
The wireless links can be divided into wireless links corresponding to the main stack points and wireless links corresponding to the auxiliary stack points, and the channel quality of the wireless links corresponding to each stack point can be determined according to the block error rate.
The wireless link corresponding to the main stack point is a wireless link with optimal channel quality, the wireless link corresponding to the main stack point is utilized to transmit the target data to the lower stack point of the protocol, the problem of large transmission consumption caused by multiple transmission of the target data can be avoided, and meanwhile, the wireless link with optimal channel quality is utilized to transmit the target data, so that the transmission efficiency of the data can be effectively ensured.
In this embodiment, optionally, the method of this embodiment further includes:
taking the rest upper stack points of the protocol as auxiliary stack points; caching the target data into an auxiliary stack point;
in the process that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point, if the feedback information of the channel quality deterioration of the wireless link corresponding to the main stack point is received, the transmission instruction of the target data is sent to the auxiliary stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point,
the auxiliary stack point can set a standby buffer queue for the main stack point before the main stack point performs data transmission, and the auxiliary stack point does not perform data transmission in the process of the data transmission of the main stack point.
One or more target data which are being transmitted by the main stack point are backed up and stored in the buffer queue, so that the main stack point can be replaced in time to transmit data when the transmission of the main stack point fails, and the target data is ensured to be transmitted through one wireless link all the time, so that the target data is transmitted to the protocol lower stack point quickly and effectively.
In this embodiment, optionally, the method of this embodiment further includes:
and after the target data is transmitted to a lower stack point of the protocol through a wireless link corresponding to the auxiliary stack point, the transmission task of the main stack point for transmitting the target data is canceled.
After detecting that the target data has been completely transmitted to the lower stack point of the protocol through the wireless link corresponding to the auxiliary stack point, in order to avoid retransmission of the transmission task blocked by the transmission of the main stack point, the transmission task of the main stack point for transmitting the target data is timely cancelled.
Therefore, after the channel quality of the wireless link where the main stack point is located is recovered, the effective transmission of the next target data is not affected.
Fig. 3 is a flowchart of another data transmission method according to the present embodiment. The present embodiment is based on the foregoing embodiment, further, after S13012, the method of the present embodiment may further include:
and S140, deleting the target data cache from the auxiliary stack point if feedback information of the channel quality degradation of the wireless link corresponding to the main stack point is not received.
After the main stack point transmits the target data to the protocol lower stack point through the corresponding wireless link, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point, such as NACK, is not received yet, it is considered that the transmission process of the target data of the channel quality of the wireless link corresponding to the main stack point is always good, that is, the target data is not affected by the channel quality in the transmission process, that is, the target data is completely transmitted.
Specifically, a field discard timer may be defined, where the discard timer is used to set a discard timer, where the discard timer is used to limit the time for transmitting the target data on the radio link where the high priority RLC entity is located. And the discarding process can be carried out on the target data cached in the auxiliary stack point after the transmission of the wireless link through the main stack point is completed by configuring a field discarding time in the RLC-Config.
The implementation principle of the discard timer is that if the final discard timer is overtime and the high-priority RLC entity does not receive the feedback NACK, the high-priority RLC entity notifies the low-priority RLC entity to discard the target data from the buffer queue through the custom interface.
In addition, in order to optimize the transmission efficiency of the target data, the data format of the target data may be packed into a data packet form, and the target data may be transmitted. Thus, the resource consumption of the wireless link in the transmission process is reduced.
Fig. 4 is a flowchart of another data transmission method according to the present embodiment. The present embodiment is based on the foregoing embodiment, where another possible implementation manner of S120 is as follows:
s12021, judging whether the block error rate of the wireless link is larger than a preset threshold value; if yes, determining that the use state of the PDCP copy function is on.
The preset threshold is a critical reference value for judging the block error rate of the wireless link. The specific setting of the numerical value can be performed according to different service requirements, and the specific numerical value of the preset threshold is not limited in the disclosure.
It should be noted that the present embodiment focuses on the ultra-reliable low-latency communication service, and in general, the value of the preset threshold may be set to 10 -5 。
When the block error rate of the wireless link is detected to be larger than a preset threshold, the channel quality of the wireless link is lower, at the moment, the target data to be transmitted is required to be copied through the PDCP copying function, the effective transmission of the data can be realized through a plurality of wireless links, and the use state of the PDCP copying function can be set to be opened.
Therefore, when the channel quality of the wireless link is lower, the plurality of wireless links obtained after division are adopted to simultaneously transmit the target data, so that the effective transmission of the target data is realized.
Further, another possible implementation of S130 is as follows:
s13021, duplicate and distribute the target data to each protocol upper stack point based on the PDCP duplication function.
After determining the target data to be transmitted, the PDCP copy function is utilized to copy the target data for multiple copies and send the copies to each protocol upper stack point. The protocol upper stack point is exemplified as the RLC entity.
For example, the protocol upper stack point includes: RLC3, RLC4 and RLC5. The PDCP layer duplicates the target data in three parts and respectively transmits the target data and the duplicated three parts of target data to the RLC3, the RLC4 and the RLC5, so that the RLC3, the RLC4 and the RLC5 can effectively transmit the target data through the wireless link where the RLC3, the RLC4 and the RLC5 are located.
S13022, transmitting the target data to the protocol lower stack point through the wireless links corresponding to each protocol upper stack point, so that the protocol lower stack point performs the de-duplication operation on at least two received target data to obtain one target data.
Each protocol upper stack point sends the target data to the protocol lower stack point through the wireless link where the protocol upper stack point is located, so that the protocol lower stack point deletes redundant target data copies after receiving a plurality of target data and copies thereof, and only one target data is reserved.
Fig. 5 is a schematic structural diagram of a data transmission device according to the present embodiment; the device is configured in the electronic equipment, and can realize the data transmission method in any embodiment of the application.
The device specifically comprises the following steps:
a determining module 510, configured to determine a quality of a wireless link in response to feedback information of a channel quality of the wireless link within a preset period;
A determining module 510, configured to determine a usage status of a PDCP duplication function according to a quality of the radio link;
a transmitting module 520, configured to transmit the target data from the upper stack point to the lower stack point based on the usage status of the PDCP copy function, where the PDCP copy function is used to copy the target data.
In this embodiment, optionally, the quality of the wireless link includes a block error rate of the wireless link;
the determining module 510 is specifically configured to:
judging whether the block error rate of the wireless link is larger than a preset threshold value or not;
if yes, determining that the use state of the PDCP copy function is on;
if not, determining that the use state of the PDCP copy function is closed.
In this embodiment, optionally, the number of the upper stack points of the protocol is at least two;
the transmission module 520 is specifically configured to:
determining the use state of the PDCP copying function as closed, and selecting a protocol upper stack point with the highest priority as a main stack point; the priority of each protocol upper stack point is determined according to the block error rate of the wireless link where the protocol upper stack point is located;
and transmitting the target data to a protocol lower stack point through the wireless link corresponding to the main stack point.
In this embodiment, optionally, the apparatus of this embodiment further includes: a buffer module and a sending module;
the buffer module is used for taking the rest protocol upper stack points as auxiliary stack points; caching target data into the auxiliary stack point;
and the sending module is used for sending a transmission instruction of the target data to the auxiliary stack point if receiving feedback information of channel quality deterioration of the wireless link corresponding to the main stack point in the process that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point.
In this embodiment, optionally, the apparatus of this embodiment further includes: deleting the module;
and the deleting module is used for deleting the target data cache from the auxiliary stack point if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is not received after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the main stack point.
In this embodiment, optionally, the apparatus of this embodiment further includes: a revocation module;
and the revocation module is used for revokeing the transmission task of the main stack point for transmitting the target data after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point.
In this embodiment, optionally, the transmission module 520 is specifically configured to:
determining the use state of the PDCP copying function as on, copying and distributing target data to each protocol upper stack point based on the PDCP copying function;
and transmitting the target data to a protocol lower stack point through a wireless link corresponding to each protocol upper stack point, so that the protocol lower stack point performs de-duplication operation on at least two received target data to obtain one target data.
According to the data transmission device provided by the embodiment of the invention, the channel quality of the wireless link is obtained by responding to the feedback information of the channel quality of the wireless link, so that the quality of the wireless link is determined, the use state of the packet data convergence protocol replication function is determined based on the quality of the wireless link, and the target data is transmitted from the protocol upper stack point to the protocol lower stack point by referring to the use state of the packet data convergence protocol replication function. The problem of high data redundancy caused by always starting a packet data convergence protocol replication function to replicate target data to be transmitted and transmitting the target data through each protocol upper stack point is avoided, and therefore the resource consumption of data transmission is effectively reduced.
The data transmission device provided by the embodiment of the invention can execute the data transmission method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Fig. 6 is a schematic structural diagram of an electronic device according to the present embodiment. As shown in fig. 6, the electronic device includes a processor 610, a memory 620, an input device 630, and an output device 640; the number of processors 610 in the electronic device may be one or more, one processor 610 being taken as an example in fig. 6; the processor 610, memory 620, input device 630, and output device 640 in the electronic device may be connected by a bus or other means, for example in fig. 6.
The memory 620 is a computer readable storage medium, and may be used to store a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the data transmission method in the embodiment of the present invention. The processor 610 executes various functional applications of the electronic device and data processing, namely, implements the data transmission method provided by the embodiment of the present invention by running software programs, instructions, and modules stored in the memory 620.
Memory 620 may include primarily a program storage area and a data storage area, wherein the program storage area may store an operating system, at least one application program required for functionality; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 620 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 620 may further include memory remotely located relative to processor 610, which may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 630 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device, which may include a keyboard, mouse, etc. The output device 640 may include a display device such as a display screen.
The present embodiment also provides a storage medium containing computer-executable instructions which, when executed by a computer processor, are used to implement the data transmission method provided by the embodiments of the present invention.
Of course, the storage medium containing the computer executable instructions provided in the embodiments of the present invention is not limited to the method operations described above, and may also perform the related operations in the data transmission method provided in any embodiment of the present invention.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiments of the search apparatus, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific implementation of the present embodiment, so that those skilled in the art may understand or implement the present embodiment. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the embodiments. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A data transmission method, wherein the method is applied to a base station, the method comprising:
responding to feedback information of channel quality of a wireless link in a preset period of time, and determining the quality of the wireless link;
determining the use state of a PDCP copying function of a packet data convergence protocol according to the quality of the wireless link;
determining the use state of the PDCP copying function as closed, and selecting a protocol upper stack point with the highest priority as a main stack point; transmitting the target data to a protocol lower stack point through a wireless link corresponding to the main stack point; taking the rest upper stack points of the protocol as auxiliary stack points; caching target data into the auxiliary stack point; in the process that target data is transmitted to a protocol lower stack point through a wireless link corresponding to the main stack point, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is received, transmitting a transmission instruction of the target data to the auxiliary stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point;
The protocol upper stack point is a radio link layer control protocol (RLC) entity for data transmission in the base station, and the protocol lower stack point is a terminal device for receiving data; or the protocol upper-level stack point is a transmitting end of a base station, the protocol lower-level stack point is a receiving end of the base station, and the protocol upper-level stack point and the protocol lower-level stack point are the same base station, or different entities of the same base station, or entities of different base stations.
2. The method of claim 1, wherein the quality of the wireless link comprises a block error rate of the wireless link;
the determining the use state of the PDCP copy function according to the quality of the radio link includes:
judging whether the block error rate of the wireless link is larger than a preset threshold value or not;
if yes, determining that the use state of the PDCP copy function is on;
if not, determining that the use state of the PDCP copy function is closed.
3. The method of claim 2, wherein the priority of each of the protocol upper stack points is determined based on a block error rate of a radio link on which the protocol upper stack point is located.
4. The method according to claim 1, wherein the method further comprises:
After the target data is transmitted to a protocol lower stack point through the wireless link corresponding to the main stack point, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is not received, deleting the target data cache from the auxiliary stack point.
5. The method according to claim 1, wherein the method further comprises:
and after the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point, the transmission task of the main stack point for transmitting the target data is canceled.
6. The method as recited in claim 1, further comprising:
determining the use state of the PDCP copying function as on, copying and distributing target data to each protocol upper stack point based on the PDCP copying function;
and transmitting the target data to a protocol lower stack point through a wireless link corresponding to each protocol upper stack point, so that the protocol lower stack point performs de-duplication operation on at least two received target data to obtain one target data.
7. A data transmission apparatus, the apparatus being configured in a base station, the apparatus comprising:
The determining module is used for responding to feedback information of the channel quality of the wireless link in a preset period of time and determining the quality of the wireless link;
the determining module is further used for determining the use state of the PDCP copying function of the packet data convergence protocol according to the quality of the wireless link;
a transmission module, configured to determine that a usage state of the PDCP copy function is closed, and select a protocol upper stack point with a highest priority as a main stack point; transmitting the target data to a protocol lower stack point through a wireless link corresponding to the main stack point; taking the rest upper stack points of the protocol as auxiliary stack points; caching target data into the auxiliary stack point; in the process that target data is transmitted to a protocol lower stack point through a wireless link corresponding to the main stack point, if feedback information of channel quality degradation of the wireless link corresponding to the main stack point is received, transmitting a transmission instruction of the target data to the auxiliary stack point, so that the target data is transmitted to the protocol lower stack point through the wireless link corresponding to the auxiliary stack point;
the protocol upper stack point is a radio link layer control protocol (RLC) entity for data transmission in the base station, and the protocol lower stack point is a terminal device for receiving data; or the protocol upper-level stack point is a transmitting end of a base station, the protocol lower-level stack point is a receiving end of the base station, and the protocol upper-level stack point and the protocol lower-level stack point are the same base station, or different entities of the same base station, or entities of different base stations.
8. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs,
when executed by the one or more processors, causes the one or more processors to implement the data transmission method of any of claims 1-6.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the data transmission method according to any one of claims 1 to 6.
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