CN113271640B - Data transmission method, base station, and computer-readable storage medium - Google Patents
Data transmission method, base station, and computer-readable storage medium Download PDFInfo
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- CN113271640B CN113271640B CN202010095636.4A CN202010095636A CN113271640B CN 113271640 B CN113271640 B CN 113271640B CN 202010095636 A CN202010095636 A CN 202010095636A CN 113271640 B CN113271640 B CN 113271640B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The disclosure provides a data transmission method, a base station and a computer readable storage medium, and relates to the technical field of wireless communication. The data transmission method disclosed by the disclosure comprises the following steps: under the condition that the base station receives the switching request confirmation information from the candidate target base station, the base station synchronizes the data to be sent to the connected terminal to the candidate target base station; the base station keeps connection and data transmission with the terminal in the process of switching the terminal to the target base station, wherein the target base station belongs to a candidate target base station; and after receiving the successful switching information from the target base station, disconnecting the connection with the terminal. By the method, the data can be synchronized to the base station possibly switched to before the terminal is switched, and the connection is kept in the process of terminal switching, so that the data transmission can be performed immediately after the terminal is switched, and the switching of the user with high reliability and zero millisecond delay in the moving process is realized.
Description
Technical Field
The present disclosure relates to the field of wireless communication technologies, and in particular, to a data transmission method, a base station, and a computer readable storage medium.
Background
In recent years, the development of wireless communication technology has undergone rapid development, and the requirements of mobile communication services are also increasing, and besides the traditional voice and internet data services, many services with various QoS (Quality of Service ) requirements are also generated, for example, some services need ultra-high reliability and ultra-low delay, including remote control, industrial automation, AR (Augmented Reality ) and VR (Virtual Reality). For such services, mobility performance should be guaranteed as much as possible, including increased reliability and reduced interruption latency.
With the increasing deployment density of wireless networks (including LTE, NR, and subsequent newer generation networks), the number of cells increases and the radius decreases, and UEs may experience more frequent handovers, and thus further enhancements to mobility procedures in wireless networks (in LTE, NR, and subsequent newer generation networks) are needed to meet both high reliability and very low handover interruption latency requirements of User Equipment (UE).
Disclosure of Invention
An object of the present disclosure is to improve reliability of handover of a terminal between base stations and eliminate data transmission delay caused by the handover.
According to an aspect of some embodiments of the present disclosure, there is provided a data transmission method, including: under the condition that the base station receives the switching request confirmation information from the candidate target base station, the base station synchronizes the data to be sent to the connected terminal to the candidate target base station; the base station keeps connection and data transmission with the terminal in the process of switching the terminal to the target base station, wherein the target base station belongs to a candidate target base station; and after receiving the successful switching information from the target base station, disconnecting the connection with the terminal.
In some embodiments, the candidate target base stations are one or more.
In some embodiments, the terminal detects candidate target base stations based on configuration information from connected base stations; and when the measurement threshold value of the candidate target base station is higher than the switching threshold value, determining the candidate target base station with the measurement threshold value higher than the switching threshold value as the target base station, and starting the operation of switching to the target base station.
In some embodiments, the data transmission method further comprises: and the target base station performs data transmission with the terminal according to the data from the core network and the data from the source base station before the connection between the source base station and the terminal is disconnected.
In some embodiments, the handover success information is achieved by adding Xn interface signaling from the target base station to the source base station.
By the method, the data can be synchronized to the base station possibly switched to before the terminal is switched, and the connection is kept in the process of terminal switching, so that the data transmission can be performed immediately after the terminal is switched, and the switching of the user with high reliability and zero millisecond delay in the moving process is realized.
According to an aspect of some embodiments of the present disclosure, there is provided a base station comprising: a data synchronization unit configured to synchronize data to be transmitted to the connected terminal to the candidate target base station in case of receiving the handover request confirm information from the candidate target base station; a connection maintaining unit configured to maintain connection and data transmission with a terminal during handover of the terminal to a target base station, wherein the target base station belongs to a candidate target base station; and a connection disconnection unit configured to disconnect the connection with the terminal after receiving the handover success information from the target base station.
In some embodiments, the base station further comprises: and a handover triggering unit configured to transmit configuration information to the terminal so that the terminal detects the candidate target base station, wherein the terminal determines the target base station and starts the operation of handover to the target base station when determining that the measurement threshold value of the candidate target base station is higher than the handover threshold value.
In some embodiments, the base station further comprises: a data receiving unit configured to receive data synchronized by a source base station to which a terminal is connected; and the terminal connection unit is configured to perform data transmission with the terminal according to the data from the source base station and the data from the core network.
According to an aspect of some embodiments of the present disclosure, there is provided a base station comprising: a memory; and a processor coupled to the memory, the processor configured to perform any of the data transmission methods mentioned above based on instructions stored in the memory.
The base station can synchronize data to the base station which is possibly switched to before the terminal is switched, and keeps connection in the process of terminal switching, so that data transmission can be performed immediately after the terminal is switched, and switching of high reliability and zero millisecond time delay of data transmission of a user in the moving process is realized.
According to an aspect of some embodiments of the present disclosure, a computer-readable storage medium is presented, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of any one of the data transmission methods above.
By executing the instructions on such computer-readable storage medium, the data can be synchronized to the base station to which the terminal is likely to be switched before switching, and the connection is maintained in the process of switching the terminal, thereby ensuring that the data transmission can be performed immediately after switching the terminal, and realizing the switching of the user with high reliability and zero millisecond delay in the moving process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the present disclosure, and together with the description serve to explain the present disclosure. In the drawings:
fig. 1 is a flow chart of some embodiments of a data transmission method of the present disclosure.
Fig. 2 is a signaling diagram of some embodiments of a data transmission method of the present disclosure.
Fig. 3 is a schematic diagram of some embodiments of a base station of the present disclosure.
Fig. 4 is a schematic diagram of further embodiments of a base station of the present disclosure.
Fig. 5 is a schematic diagram of further embodiments of a base station of the present disclosure.
Detailed Description
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
A flow chart of some embodiments of the data transmission method of the present disclosure is shown in fig. 1.
In step 101, the base station synchronizes data to be transmitted to the connected terminal to the candidate target base station in case of receiving the handover request confirm information from the candidate target base station. In some embodiments, the terminal starts a periodic measurement process when the signal quality of the connected base station reaches a low threshold, detects the received signal quality of surrounding candidate cells, and sends the signal quality to the source base station, and the source base station sends a conditional handover request to the base station of the surrounding candidate cells with the quality reaching a predetermined standard.
In some embodiments, the base station may send a conditional handoff request to one or more surrounding base stations and wait for handoff request acknowledgement information fed back by the base station that allows access. And determining the base station with the feedback switching request confirmation information as a candidate target base station to which the terminal is switched.
In some embodiments, the candidate target base stations may be one or more. The base station transmits the received data to be transmitted to the terminal to each candidate target base station.
In step 102, the terminal detects candidate target base stations according to configuration information from the connected base stations; and when the measurement threshold value of the candidate target base station is higher than the switching threshold value, determining the target base station, and starting the operation of switching to the target base station. The base station maintains connection and data transmission with the terminal during the handover of the terminal to the target base station. In some embodiments, the measurement threshold may be a signal quality threshold of the received candidate target base station.
In step 103, after receiving the handover success information from the target base station, the connection with the terminal is disconnected. In some embodiments, the transmission of the handover success information may be achieved by adding Xn interface signaling from the target base station to the source base station, with reference to 3GPP protocol TS 36.423.
In some embodiments, after the handover is completed, the target base station performs data transmission with the terminal according to data from the terminal source base station before the source base station disconnects from the terminal, and data from the core network.
By the method, the data can be synchronized to the base station possibly switched to before the terminal is switched, and the connection is kept in the process of terminal switching, so that the data transmission can be performed immediately after the terminal is switched, and the switching of the user with high reliability and zero millisecond delay in the moving process is realized.
A signaling interaction diagram of some embodiments of the data transmission method of the present disclosure is shown in fig. 2.
In 201-205, the terminal 21 starts a periodic measurement procedure under a lower threshold to detect the received signal quality of surrounding candidate cells. The base station to which the terminal is allowed to switch feeds back Handover Request Acknowledge signaling by which the source base station 22 determines candidate target base stations 23, 24 and informs the terminal 21 to send relevant configuration information to the UE. In fig. 2, two candidate target base stations are taken as an example, and in an actual application scenario, the number of candidate target base stations may be two or more.
In 206, the source base station 21 sends data to be transmitted to the terminal to the respective candidate target base stations 22, 23. At this time, the source base station keeps on the connection state with the UE, and maintains the data transmission process with the UE.
In 207 to 208, the UE 21 starts to detect candidate target base stations after receiving the configuration information sent from the source base station, and when the signal quality of a certain candidate target base station (assuming that the candidate target base station 23) meets a predetermined high threshold, uses the base station as a target base station, and the terminal triggers a handover procedure to synchronize with the target base station.
In 209-211, when the UE is successfully connected to the target base station, since the target base station side already has data transmitted from the source base station, the target base station may directly perform data transmission with the UE, and meanwhile, the target base station sends a Handover Success signaling to the source base station to inform the source base station that the UE has been successfully connected, and the source base station disconnects from the UE after receiving the signaling.
By the data transmission mode, the connection with the source base station can be kept before the terminal finishes switching, so that normal communication with the terminal can be kept uninterrupted; and each candidate target base station caches the data to be sent to the terminal, so that no matter which base station the terminal selects to switch to, the base station can provide service for the terminal based on the cached data, thereby improving the reliability and achieving the effect of switching to the influence of zero time delay on data transmission.
By the mode in the above embodiment, the base station switching mode in the related technology can be organically combined, and a reasonable data transmission mode at the RAN side is provided, so that high reliability and zero millisecond time delay of switching are ensured.
A schematic diagram of some embodiments of a base station of the present disclosure is shown in fig. 3.
The data synchronization unit 301 can synchronize data to be transmitted to the connected terminal to the candidate target base station in the case of receiving the handover request confirm information from the candidate target base station. In some embodiments, the candidate target base stations may be one or more. The base station transmits the received data to be transmitted to the terminal to each candidate target base station.
The connection holding unit 302 can hold connection and data transmission with the terminal during handover of the terminal to the target base station.
The connection disconnection unit 303 can disconnect the connection with the terminal after receiving the handover success information from the target base station. In some embodiments, the transmission of handover success information may be achieved by increasing Xn interface signaling from the target base station to the source base station.
The base station can synchronize data to the base station which is possibly switched to before the terminal is switched, and keeps connection in the process of terminal switching, so that data transmission can be performed immediately after the terminal is switched, and switching of high reliability and zero millisecond time delay of data transmission of a user in the moving process is realized.
In some embodiments, as shown in fig. 3, the base station may further include a handover triggering unit 304 capable of sending configuration information to the terminal for the terminal to detect candidate target base stations. And when the terminal determines that the measurement threshold value of the candidate target base station is higher than the switching threshold value, determining the target base station and starting the operation of switching to the target base station.
The base station can enable the terminal to select the target base station in the range of the candidate target base station, thereby ensuring that the base station to which the terminal is switched synchronizes data to be sent to the terminal and avoiding data transmission delay caused by the switching of the base station.
In some embodiments, as shown in fig. 3, the base station may further comprise a data receiving unit 305 and a terminal connection unit 306. The data receiving unit 305 can receive data synchronized by a source base station to which a terminal is connected in a case where the own base station is a candidate target base station. The terminal connection unit 306 can perform data transmission with the terminal according to the data from the source base station and the data from the core network after the terminal is switched to the base station.
The base station can buffer the data to be sent to the terminal under the condition of serving as a candidate target base station, so that service can be provided for the terminal based on the buffered data, and the effect of switching the influence of zero time delay on data transmission is achieved.
A schematic structural diagram of one embodiment of a base station of the present disclosure is shown in fig. 4. The base station comprises a memory 401 and a processor 402. Wherein: memory 401 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used to store instructions in the corresponding embodiments of the data transmission methods described above. Processor 402 is coupled to memory 401 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 402 is configured to execute instructions stored in the memory, and is capable of implementing a high reliability handover of a user during movement with zero millisecond delay for data transmission.
In one embodiment, as also shown in fig. 5, a base station 500 includes a memory 501 and a processor 502. The processor 502 is coupled to the memory 501 via a BUS 503. The base station 500 may also be connected to external storage 505 via a storage interface 504 for invoking external data, and may also be connected to a network or another computer system (not shown) via a network interface 506. And will not be described in detail herein.
In this embodiment, the data instruction is stored in the memory, and then the processor processes the instruction, so that the user can switch with high reliability and zero millisecond delay in the data transmission process.
In another embodiment, a computer readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiments of the data transmission method. It will be apparent to those skilled in the art that embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure and are not limiting thereof; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments of the disclosure or equivalents may be substituted for part of the technical features; without departing from the spirit of the technical solutions of the present disclosure, it should be covered in the scope of the technical solutions claimed in the present disclosure.
Claims (8)
1. A data transmission method, comprising:
the base station sends a conditional switching request to the base stations of surrounding candidate cells with the received signal quality reaching a preset standard, and the base station with the switching request confirmation information fed back is determined as a candidate target base station, wherein the terminal detects the received signal quality of the surrounding candidate cells and sends the received signal quality to the base station connected with the terminal under the condition that the signal quality of the connected base station reaches a low threshold;
under the condition that the base station receives the switching request confirmation information from the candidate target base station, synchronizing the data to be sent to the connected terminal to the candidate target base station so as to enable the candidate target base station to be cached;
the base station keeps connection and data transmission with the terminal in the process of switching the terminal to the target base station, wherein the terminal detects the candidate target base station according to configuration information from the connected base station, when the measurement threshold value of the candidate target base station is higher than a switching threshold value, the candidate target base station with the measurement threshold value higher than the switching threshold value is determined to be the target base station, and the operation of switching to the target base station is started;
and disconnecting the connection with the terminal after receiving the switching Success information from the target base station, wherein the switching Success information is a Handover Success signaling, and the target base station performs data transmission with the terminal according to the data from the core network and the data from the source base station before the connection between the source base station and the terminal is disconnected.
2. The method of claim 1, wherein,
the candidate target base stations are one or more.
3. The method of claim 1, wherein the handover success information is achieved by increasing Xn interface signaling from a target base station to a source base station.
4. A base station, comprising:
a data synchronization unit configured to synchronize data to be transmitted to a connected terminal to the candidate target base station for buffering by the candidate target base station in the case of receiving handover request confirmation information from the candidate target base station, wherein the terminal detects the received signal quality of surrounding candidate cells in the case that the signal quality of the connected base station reaches a low threshold and transmits the received signal quality to the base station connected to the terminal, and the base station connected to the terminal transmits a conditional handover request to the base station of the surrounding candidate cells whose quality reaches a predetermined standard, and determines the base station to which the handover request confirmation information is fed back as the candidate target base station;
a connection maintaining unit configured to maintain connection and data transmission with a terminal in a process of switching the terminal to a target base station, wherein the target base station belongs to the candidate target base station, the terminal detects the candidate target base station according to configuration information from the connected base station, determines the candidate target base station with a measurement threshold value higher than a switching threshold value as a target base station when the measurement threshold value of the candidate target base station is higher than the switching threshold value, and starts operation of switching to the target base station;
and the connection disconnection unit is configured to disconnect the connection with the terminal after receiving the successful Handover information from the target base station, wherein the successful Handover information is a Handover Success signaling, and the target base station performs data transmission with the terminal according to the data from the core network and the data from the source base station before the connection between the source base station and the terminal is disconnected.
5. The base station of claim 4, further comprising:
and the switching triggering unit is configured to send configuration information to the terminal so that the terminal detects the candidate target base stations, wherein the terminal determines the target base stations and starts the operation of switching to the target base stations when determining that the measurement threshold value of the candidate target base stations is higher than the switching threshold value.
6. The base station of claim 5, further comprising:
a data receiving unit configured to receive data synchronized by a source base station to which a terminal is connected;
and the terminal connection unit is configured to perform data transmission with the terminal according to the data from the source base station and the data from the core network.
7. A base station, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-3 based on instructions stored in the memory.
8. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 3.
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| WO2018045865A1 (en) * | 2016-09-08 | 2018-03-15 | 中兴通讯股份有限公司 | Base station handover method and apparatus |
| CN110099419A (en) * | 2018-01-31 | 2019-08-06 | 惠州Tcl移动通信有限公司 | Communication handover method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10244444B2 (en) * | 2015-03-04 | 2019-03-26 | Qualcomm Incorporated | Dual link handover |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017152757A1 (en) * | 2016-03-11 | 2017-09-14 | 深圳市金立通信设备有限公司 | Cell handover method and system, and related device |
| WO2018045865A1 (en) * | 2016-09-08 | 2018-03-15 | 中兴通讯股份有限公司 | Base station handover method and apparatus |
| CN110099419A (en) * | 2018-01-31 | 2019-08-06 | 惠州Tcl移动通信有限公司 | Communication handover method and device |
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