CN114375019A - NB-IoT mobile state data retransmission method and system - Google Patents
NB-IoT mobile state data retransmission method and system Download PDFInfo
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- CN114375019A CN114375019A CN202210053343.9A CN202210053343A CN114375019A CN 114375019 A CN114375019 A CN 114375019A CN 202210053343 A CN202210053343 A CN 202210053343A CN 114375019 A CN114375019 A CN 114375019A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 11
- 238000004590 computer program Methods 0.000 claims description 8
- 238000013500 data storage Methods 0.000 claims description 6
- 238000012217 deletion Methods 0.000 claims description 6
- 230000037430 deletion Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/02—Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
- H04W36/023—Buffering or recovering information during reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The invention discloses an NB-IoT mobile state data retransmission method and a system, wherein the method comprises the following steps: receiving user data and storing the user data to a preset buffer area; reading user data from the buffer area, transmitting the user data and feeding back a transmission state; and under the condition that the fed back transmission state is the transmission failure of the user data, analyzing the connection state of the NB-IoT network, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data. According to the invention, the buffer area is configured, and the user data is stored in the buffer area before being sent, so that the user data can be read from the buffer area again for retransmission after the data transmission fails and the NB-IoT network connection succeeds, thereby reducing or eliminating the uplink packet loss of the user and improving the communication efficiency.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an NB-IoT mobile status data retransmission method, system, electronic device, and computer-readable storage medium.
Background
The cellular-based narrowband Internet of Things (NB-IoT) is an important branch of the Internet of everything. The NB-IoT is constructed in a cellular network, only consumes about 180KHz of bandwidth, and can be directly deployed in a GSM network, a UMTS network or an LTE network so as to reduce the deployment cost and realize smooth upgrading. NB-IoT is an emerging technology in the IoT domain that supports cellular data connectivity for low power devices over wide area networks, also known as Low Power Wide Area Networks (LPWANs). NB-IoT supports efficient connectivity for devices with long standby time and high requirements for network connectivity.
At present, when an existing NB-IoT network is applied to a mobile device, a situation of data loss often occurs due to a user using an NB-IoT state device for data transmission in a mobile state, and the reason for the situation is that the user enters another signal coverage area from the signal coverage area in the mobile state, and the movement of different signal coverage areas causes the device to perform connection release to enter an idle state and perform area reselection, so that data is already interrupted without being received, and then the situation of data transmission loss occurs, and the phenomenon of data transmission loss seriously affects the use experience of the user.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
In view of the problems in the related art, the present invention provides an NB-IoT mobility state data retransmission method, system, electronic device and computer-readable storage medium to solve the above technical problems.
The technical scheme of the invention is realized as follows:
according to an aspect of the present invention, there is provided an NB-IoT mobility state data retransmission method applied to an NB-IoT network.
The NB-IoT mobile state data retransmission method comprises the following steps:
receiving user data and storing the user data to a preset buffer area;
reading user data from the buffer area, transmitting the user data and feeding back a transmission state;
and under the condition that the fed back transmission state is the transmission failure of the user data, analyzing the connection state of the NB-IoT network, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data.
In addition, the NB-IoT mobility state data retransmission method further includes:
when storing the user data into a pre-configured buffer area, configuring a deleting processing mechanism for the user data in the buffer area, and deleting the user data in the buffer area by using the deleting mechanism.
Wherein the deletion processing mechanism comprises:
deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted;
under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful;
deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
According to another aspect of the present invention, there is provided an NB-IoT mobility state data retransmission system applied to an NB-IoT network.
The NB-IoT mobile status data retransmission system includes:
the data cache module is used for receiving the user data and storing the user data to a preset buffer area;
the data transmission module is used for reading user data from the buffer area, transmitting the user data and feeding back a transmission state;
and the data retransmission module is used for analyzing the NB-IoT network connection state under the condition that the feedback transmission state is the user data transmission failure, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data.
In addition, the NB-IoT mobility state data retransmission system further includes:
and the data deleting module is used for configuring a deleting processing mechanism for the user data in the buffer area when the user data is stored in the pre-configured buffer area, and deleting the user data in the buffer area by using the deleting mechanism.
Wherein the deletion processing mechanism comprises:
deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted;
under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful;
deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
According to yet another aspect of the present invention, there is provided an electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the NB-IoT mobility state data retransmission method described above when executing the computer program.
According to yet another aspect of the present invention, a computer readable storage medium is provided, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the NB-IoT mobility state data retransmission method described above.
Has the advantages that: according to the invention, the buffer area is configured, and the user data is stored in the buffer area before being sent, so that the user data can be read from the buffer area again for retransmission after the data transmission fails and the NB-IoT network connection succeeds, thereby reducing or eliminating the uplink packet loss of the user and improving the communication efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart illustrating an NB-IoT mobility state data retransmission method according to an embodiment of the present invention;
fig. 2 is a block diagram of an NB-IoT mobility state data retransmission system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
According to the embodiment of the invention, an NB-IoT mobile state data retransmission method, an NB-IoT mobile state data retransmission system, an electronic device and a computer-readable storage medium are provided.
Example 1
As shown in fig. 1, an NB-IoT mobility state data retransmission method according to an embodiment of the present invention is applied to an NB-IoT network, and includes:
step S101, receiving user data and storing the user data to a preset buffer area;
step S103, reading user data from the buffer area, transmitting the user data and feeding back a transmission state;
and step S105, under the condition that the feedback transmission state is the transmission failure of the user data, analyzing the connection state of the NB-IoT network, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data.
In one embodiment, the NB-IoT mobility state data retransmission method further comprises: when storing the user data into a pre-configured buffer area, configuring a deleting processing mechanism for the user data in the buffer area, and deleting the user data in the buffer area by using the deleting mechanism. Wherein the deletion processing mechanism comprises: deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted; under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful; deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
Example 2
As shown in fig. 2, an NB-IoT mobility state data retransmission system according to an embodiment of the present invention, which is applied to an NB-IoT network, includes:
the data caching module 201 is configured to receive user data and store the user data in a preset buffer area;
the data transmission module 203 is configured to read user data from the buffer, transmit the user data, and feed back a transmission state;
and the data retransmission module 205 is configured to analyze the NB-IoT network connection state when the fed back transmission state is a user data transmission failure, and read the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmit the user data.
In one embodiment, the NB-IoT mobility state data retransmission system further comprises: a data deleting module (not shown in the figure), configured to, when storing the user data in a pre-configured buffer, configure a deleting processing mechanism for the user data in the buffer, and delete the user data in the buffer by using the deleting mechanism. Wherein the deletion processing mechanism comprises: deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted; under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful; deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
In order to better and conveniently understand the above technical solution of the present invention, the following describes the data transmission flow mechanism from the perspective of NB-IoT network architecture, specifically as follows:
after receiving the user data, the NAS layer adds a cache mechanism, caches the data, starts a discard timer and then sends the data to the RRC layer, and the RRC layer performs data transmission and returns a transmission result; after receiving the transmission result indication of the RRC layer, the NAS layer processes the result indication, deletes the cache data if the transmission is successful, marks the cache data as the data to be retransmitted if the transmission is failed, and waits for the cell reselection success indication of the RRC; and after receiving the RRC layer cell reselection indication, the NAS layer judges whether the data to be retransmitted needs to be transmitted or not, and if so, transmits the data.
The process of the UE entering from one cell to another cell in the moving state is as follows:
and the physical layer of the UE detects the reduction of the channel quality of the original cell, informs the RRC layer through reporting out of sync, and after T310 is overtime, the RRC layer releases the connection to enter an idle state and reselects the cell. The RRC layer checks whether data which are successfully transmitted exist or not, if so, the data transmission failure indication is sent to the NAS layer, the NAS layer cannot immediately start retransmission after the indication, the cell reselection needs to be carried out on the RRC layer, and the retransmission is carried out after the new cell is successfully reselected. And after the RRC cell is successfully reselected, the NAS layer successfully reselects the NAS cell, and the NAS layer retransmits data.
In summary, according to the technical solution of the present invention, by configuring the buffer area and storing the user data in the buffer area before sending, the user data can be read from the buffer area again for retransmission after the data transmission fails and the NB-IoT network connection succeeds, so that the uplink packet loss of the user is reduced or eliminated, and the communication efficiency is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. An NB-IoT mobility state data retransmission method, wherein the NB-IoT mobility state data retransmission method is applied to an NB-IoT network, and comprises the following steps:
receiving user data and storing the user data to a preset buffer area;
reading user data from the buffer area, transmitting the user data and feeding back a transmission state;
and under the condition that the fed back transmission state is the transmission failure of the user data, analyzing the connection state of the NB-IoT network, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data.
2. The NB-IoT mobility state data retransmission method in accordance with claim 1, further comprising:
when storing the user data into a pre-configured buffer area, configuring a deleting processing mechanism for the user data in the buffer area, and deleting the user data in the buffer area by using the deleting mechanism.
3. The NB-IoT mobility state data retransmission method according to claim 2, wherein the deletion processing mechanism comprises:
deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted;
under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful;
deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
4. An NB-IoT mobility state data retransmission system, wherein the NB-IoT mobility state data retransmission system is applied to an NB-IoT network, and comprises:
the data cache module is used for receiving the user data and storing the user data to a preset buffer area;
the data transmission module is used for reading user data from the buffer area, transmitting the user data and feeding back a transmission state;
and the data retransmission module is used for analyzing the NB-IoT network connection state under the condition that the feedback transmission state is the user data transmission failure, reading the user data from the buffer again after the analysis result is that the NB-IoT network connection is successful, and retransmitting the user data.
5. The NB-IoT mobility state data retransmission system according to claim 4, further comprising:
and the data deleting module is used for configuring a deleting processing mechanism for the user data in the buffer area when the user data is stored in the pre-configured buffer area, and deleting the user data in the buffer area by using the deleting mechanism.
6. The NB-IoT mobility state data retransmission system according to claim 5, wherein the deletion handling mechanism comprises:
deleting the user data in the buffer area under the condition that the feedback transmission state is that the user data is successfully transmitted;
under the condition that the feedback transmission state is the transmission failure of the user data, retransmitting the user data, and deleting the user data in the buffer area under the condition that the retransmission is successful;
deleting the user data in the buffer in case the user data storage time in the buffer exceeds a predetermined time threshold.
7. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements the NB-IoT mobility state data retransmission method of any of claims 1-3.
8. A computer readable storage medium, having stored thereon a computer program, the computer program, when being executed by a processor, realizing the steps of the NB-IoT mobility state data retransmission method according to any of the claims 1 to 3.
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