CN117580117A

CN117580117A - Data transmission method, device, equipment and storage medium

Info

Publication number: CN117580117A
Application number: CN202311375657.1A
Authority: CN
Inventors: 崔琪楣; 王英泽; 傅敏行; 侯延昭; 陶小峰; 张平
Original assignee: Peng Cheng Laboratory
Current assignee: Peng Cheng Laboratory
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-02-20

Abstract

The invention relates to the technical field of data transmission, and discloses a data transmission method, a device, equipment and a storage medium, wherein the method comprises the following steps: when a current access node associated with a user terminal triggers a preset node switching condition, determining an idle access node in an active open loop network through an anchor node, wherein the active open loop network comprises: the system comprises an anchor node, a high-power node and a plurality of access nodes; associating the user terminal with the idle access node; when the association is completed, judging whether the idle access node triggers a preset node switching condition or not; if yes, the associated node of the user terminal is switched to a high-power node, and data transmission is carried out through the high-power node. When the idle access node of the user terminal triggers the preset node switching condition, the invention switches the associated node into the high-power node for data transmission, thereby solving the technical problem that the reliability of the active open-loop network in the prior art cannot be ensured to transmit data reliably when the reliability of the open-loop transmission is deteriorated.

Description

Data transmission method, device, equipment and storage medium

Technical Field

The present invention relates to the field of data transmission technologies, and in particular, to a data transmission method, apparatus, device, and storage medium.

Background

Ultra-reliable Low-latency communication (URLLC) is one of the important service classes of 5G and 6G, but the existing communication architecture based on closed-loop transmission cannot meet the requirement of increasingly stringent end-to-end latency, so an active network architecture based on open-loop transmission has been developed. The active open loop network is composed of AN Anchor Node (AN) and a plurality of Access Points (APs), and when data transmission is performed, serious collision or information congestion may occur on one or a plurality of APs, so that data transmission is abnormal.

At present, in the existing scheme, a mode of replacing an AP node can be adopted to reduce conflict, and data transmission reliability is guaranteed. However, when the resources are scarce or the network load is extremely high, the communication mode of the open loop transmission may fail or potentially fail, so that the reliability of the active network based on the open loop transmission may be rapidly deteriorated, and the reliable transmission of the data may not be ensured.

The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.

Disclosure of Invention

The invention mainly aims to provide a data transmission method, a device, equipment and a storage medium, and aims to solve the technical problem that the reliability of open loop transmission of an active open loop network in the prior art is deteriorated and the reliable transmission of data cannot be ensured.

In order to achieve the above object, the present invention provides a data transmission method, including:

when a current access node associated with a user terminal triggers a preset node switching condition, determining an idle access node in an active open loop network through an anchor node, wherein the active open loop network comprises: the anchor node, the high-power node and the access nodes;

associating the user terminal with the idle access node;

when the association is completed, judging whether the idle access node triggers the preset node switching condition or not;

if yes, switching the associated node of the user terminal into the high-power node, and carrying out data transmission through the high-power node.

Optionally, if so, switching the associated node of the ue to the high-power node, and performing data transmission through the high-power node, including:

if yes, determining a trigger end of node switching operation;

if the trigger terminal is the user terminal, acquiring an available time-frequency resource from a preset available time-frequency resource table corresponding to the high-power node;

transmitting a node switching request to the anchor node based on the available time-frequency resources through the idle access node, wherein the anchor node switches the associated node of the user terminal to the high-power node when receiving the node switching request;

When the switching is completed, transmitting data to be transmitted to the high-power node through the user terminal based on target available time-frequency resources in available time-frequency resource broadcasting;

when the high-power node receives the data to be transmitted, multi-user conflict processing is carried out through the high-power node;

when the processing is completed, judging whether the data to be transmitted is the correctly received data or not;

if yes, the data to be transmitted are sent to the anchor node through the high-power node.

Optionally, the step of performing multiuser collision processing by the high-power node when the high-power node receives the data to be transmitted includes:

when the high-power node receives the data to be transmitted, judging whether the available time-frequency resources in the high-power node are occupied or not;

if not, executing the step of judging whether the data to be transmitted is the correctly received data;

or if yes, discarding the data to be transmitted through the high-power node.

Optionally, after the step of sending, by the ue, the data to be transmitted to the high-power node based on the target available time-frequency resource in the available time-frequency resource broadcast when the handover is completed, the method further includes:

Starting a sending timer through the user terminal;

and if yes, sending the data to be transmitted to the anchor node through the high-power node, wherein the step comprises the following steps:

if yes, dividing the target available time-frequency resources to the user terminal through the high-power node;

when the division is completed, broadcasting the current available time-frequency resource information to all user terminals in the range of the target node;

and when the broadcasting is finished, sending an acceptance confirmation signaling to the user terminal through the high-power node, and sending the data to be transmitted to the anchor node, wherein the user terminal terminates the sending timer when receiving the acceptance confirmation signaling.

Optionally, after the step of sending, by the high-power node, the data to be transmitted to the anchor node if yes, the method further includes:

detecting the node quality of all access nodes in a virtual cell where the user terminal is located in a periodic association mode, and determining a target access node of which the node quality meets a preset node quality condition;

transmitting target transmission data to the target access node through the user terminal, wherein the target transmission data carries a rollback request and an ending identifier;

Transmitting the target transmission data to the anchor node through the target access node, and transmitting an information release notification to the high-power node by the anchor node according to the rollback request and the ending identifier;

and when the high-power node receives the information release notification, releasing the context information of the user terminal, and broadcasting updated current available time-frequency resource information to all the user terminals.

Optionally, after the step of determining the trigger end of the node switching operation if the node switching operation is performed, the method further includes:

if the trigger end is the anchor node, a node switching instruction is sent to the user terminal through the idle access node, and the user terminal switches an associated node to the high-power node when receiving the node switching instruction;

when the switching is completed, sending target data to be transmitted and a data transmission instruction to the high-power node through the anchor node, wherein the data transmission instruction carries target time-frequency resources;

and when the high-power node receives the data transmission instruction, the high-power node sends the target data to be transmitted to the user terminal according to the target time-frequency resource.

Optionally, after the step of sending, by the high-power node, the target data to be transmitted to the user terminal according to the target time-frequency resource, the method further includes:

carrying out integrity check on the target data to be transmitted through the user terminal;

and if the target data to be transmitted is complete data to be transmitted, sending a target acceptance confirmation signaling to the high-power node through the user terminal so as to establish connection between the user terminal and the high-power node.

In addition, to achieve the above object, the present invention also proposes a data transmission device, the device comprising:

the node determining module is configured to determine, by using the anchor node, an idle access node in an active open-loop network when a current access node associated with the user terminal triggers a preset node switching condition, where the active open-loop network includes: the anchor node, the high-power node and the access nodes;

a node association module, configured to associate the user terminal with the idle access node;

the condition judging module is used for judging whether the idle access node triggers the preset node switching condition when the association is completed;

And the data transmission module is used for switching the associated node of the user terminal into the high-power node if yes, and carrying out data transmission through the high-power node.

In addition, to achieve the above object, the present invention also proposes a data transmission apparatus, the apparatus comprising: a memory, a processor and a data transmission program stored on the memory and executable on the processor, the data transmission program being configured to implement the steps of the data transmission method as described above.

In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a data transmission program which, when executed by a processor, implements the steps of the data transmission method as described above.

In the present invention, when the current access node associated with the user terminal triggers the preset node switching condition, the idle access node in the active open loop network is determined by the anchor node, and the active open loop network comprises: the system comprises an anchor node, a high-power node and a plurality of access nodes; associating the user terminal with the idle access node; when the association is completed, judging whether the idle access node triggers a preset node switching condition or not; if yes, switching the associated node of the user terminal into a high-power node, and transmitting data through the high-power node; compared with the prior art that the conflict is reduced by replacing the AP node, the reliable transmission of the data cannot be guaranteed when the resources are short or the network load is extremely high, because the method and the device associate the user terminal with the idle access node when the current access node associated with the user terminal triggers the preset node switching condition and switch the associated node into the high-power node to perform the data transmission when the idle access node triggers the preset node switching condition, the technical problem that the reliable transmission of the data cannot be guaranteed when the reliability of the open-loop transmission of the active open-loop network in the prior art is deteriorated is solved.

Drawings

Fig. 1 is a schematic structural diagram of a data transmission device in a hardware operating environment according to an embodiment of the present invention;

fig. 2 is a flow chart of a first embodiment of the data transmission method of the present invention;

fig. 3 is a schematic diagram of an active open loop network according to a first embodiment of the data transmission method of the present invention;

fig. 4 is a schematic diagram of data transmission of an active open loop network according to a first embodiment of the data transmission method of the present invention;

fig. 5 is a schematic diagram of an active open loop network when a high power node is used in the first embodiment of the data transmission method according to the present invention;

fig. 6 is a flowchart of a second embodiment of the data transmission method of the present invention;

fig. 7 is a signaling diagram of a user entering a coverage area of a high power node in a first embodiment of a data transmission method according to the present invention;

fig. 8 is a signaling diagram of an uplink handover procedure in a second embodiment of the data transmission method according to the present invention;

fig. 9 is a flowchart illustrating a multi-user collision processing in a second embodiment of the data transmission method according to the present invention;

fig. 10 is a broadcast signaling diagram of a high power node in a second embodiment of the data transmission method according to the present invention;

fig. 11 is a schematic diagram of automatic retransmission after the triggering timer expires in the second embodiment of the data transmission method according to the present invention;

Fig. 12 is a flowchart of a third embodiment of a data transmission method according to the present invention;

fig. 13 is a downlink handover procedure signaling diagram in a third embodiment of the data transmission method according to the present invention;

fig. 14 is a block diagram of a first embodiment of the data transmission device according to the present invention.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic diagram of a data transmission device structure of a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the data transmission apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

Those skilled in the art will appreciate that the structure shown in fig. 1 does not constitute a limitation of the data transmission device and may include more or fewer components than shown, or may combine certain components, or may be arranged in different components.

As shown in fig. 1, an operating system, a network communication module, a user interface module, and a data transmission program may be included in the memory 1005 as one type of storage medium.

In the data transmission device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the data transmission apparatus of the present invention may be provided in a data transmission apparatus, which invokes a data transmission program stored in the memory 1005 through the processor 1001 and executes the data transmission method provided by the embodiment of the present invention.

An embodiment of the present invention provides a data transmission method, referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the data transmission method of the present invention.

In this embodiment, the data transmission method includes the following steps:

step S10: when a current access node associated with a user terminal triggers a preset node switching condition, determining an idle access node in an active open loop network through an anchor node, wherein the active open loop network comprises: the anchor node, the high power node, and the plurality of access nodes.

It should be noted that, the execution body of the method of the present embodiment may be a data transmission device that performs data transmission through an active open loop network, or other data transmission systems that can implement the same or similar functions and include the data transmission device. The data transmission method provided in this embodiment and the following embodiments will be specifically described herein with reference to a data transmission system (hereinafter referred to as a system).

It should be understood that the above-mentioned user terminal may be an intelligent terminal device with a communication function of a user, for example: smart phones, tablet computers, notebook computers, etc., which are not limited in this embodiment.

It will be appreciated that the current access node may be a node associated with a user terminal in an active open loop network, which provides a data transmission service for the user terminal. The active open loop network is based on open loop transmission. The active open loop network removes a series of control signaling and RRC (Radio Resource Control ) messages required before user data transmission and cancels a feedback confirmation and retransmission mechanism after data transmission by fusing virtual cells, coordinated multi-point transmission (Coordinated Multiple Points Transmission/Reception, coMP), multi-link coding, expected mobility management, multi-user detection and other technologies based on strong computing and storage capacity of a network side, focuses on the transmission of the data, ensures certain reliability and realizes extremely low communication delay from end to end.

It should be noted that, referring to fig. 3, fig. 3 is a schematic diagram of an active open loop network in a first embodiment of the data transmission method according to the present invention. As shown in fig. 3, the active open loop network is composed of AN Anchor Node (AN) and a plurality of Access Points (APs), each AN manages all APs distributed in its coverage area (e.g., AP 1-AP 5 in fig. 3), and coordinates the plurality of APs and radio resources to form a Virtual Cell (VC) centered on a user (e.g., device 1-device 3 in fig. 3), and AN on-AN-carries AN edge server to provide corresponding computing power support to implement network functions. The AP serves as a relay between the user and the AN, and besides providing effective service space coverage, only has the functions of transmitting uplink data back and transmitting downlink data, and each AP serves only the user corresponding to the virtual cell to which it belongs. The sensors distributed in the active network can sense the surrounding information and upload the sensed data to the AN, supplementing the active network with information that cannot be obtained due to open loop transmission.

It should be understood that the establishment of the virtual cell in the active open loop network is that the user actively disassociates the AP with good quality nearby to form the virtual cell, the AP communicates with the intelligent device at the physical layer through OFDMA (Orthogonal Frequency Division Multiple Access ), and the AN is responsible for coordinating radio resources and performing active network management and control functions. The AP is transparent to the user, namely, the user can actively associate a plurality of APs to form VC to communicate with the AN when the user sends and receives data. Specifically, referring to fig. 4, fig. 4 is a schematic diagram illustrating data transmission of an active open loop network according to a first embodiment of the data transmission method of the present invention. As shown in fig. 4, when any intelligent device (user terminal) enters AN area served by the AN, the corresponding AP may be actively associated, and at this time, the AN may initiate passive management such as expected mobility management, predicted resource recommendation, and the like. In the data uplink transmission, the AP does not reserve a special radio resource (time-frequency resource RRU) to the user after being selected, but the user randomly selects the time-frequency resource RRU to upload data. Since AN AP is likely to be selected by multiple users and thus will be subject to conflicts, AN with edge computing capabilities can analyze previous usage experience and recent network status, and by means of machine learning, provide each intelligent device with a predictive suggestion (AN provides a user to AP connection suggestion based on mobility predictions or other special cases, where mobility predictions may be predictive of the location of the user's movement), each user can choose to choose radio resources based on this suggestion and his own urgent needs (i.e., the user chooses the appropriate AP for data transmission based on connection suggestions from the AN) to mitigate potential conflicts. In the downlink transmission, due to the overall management of the AN, time-frequency resource collision caused by random selection like the uplink transmission will not occur. In practical application, when the user terminal is in the virtual cell, in order to realize ultra-low delay of each open loop radio transmission, active network association can be adopted, and only proper AP is selected in the range to perform data transmission, so that a switching mechanism does not exist in the virtual cell. When the equipment moves, the equipment is insensitive to the replacement of the AP and other external environment changes in the moving process of the area, only knows which radio resources can be used, and actively disassociates the AP nodes with good quality nearby along with the movement of the equipment, so that the equipment gradually drives the movement of the virtual cell. The AN is responsible for mobile prediction and tracking of the intelligent device and dynamically coordinates the multiple APs to service it.

It will be appreciated that active open loop networks may typically employ a replacement of AP nodes to reduce the collision assurance reliability when serious collisions or congestion of information occur at one or more APs. In some special cases, however, the communication mode of open loop transmission may fail or potentially fail, for example: when the resources are short or the network load is extremely high, no idle radio resource sheet is available for a certain user on the AP within a certain range; the user temporarily moves to a remote area where the AP is sparse; or other emergency situations cause the information receiving and transmitting congestion and loss of all the AP nodes in a certain range to be serious, and all the three situations can cause the reliability of the active network based on open loop transmission to be seriously deteriorated and can not be improved by replacing the AP nodes. Therefore, in this embodiment, the High Power Node HPN (High Power Node) may be used as a supplement in the special scenario that the active open loop network fails in the open loop transmission mode, where the HPN will occupy a small portion of the spectrum resource alone. Referring to fig. 5, fig. 5 is a schematic diagram of an active open loop network when a high power node is used in a first embodiment of the data transmission method according to the present invention. When the reliability of the open loop transmission mode cannot be guaranteed, the data packet to be transmitted can be switched to be transmitted through the high power node HPN. In addition, if the normal congestion relief and the open loop transmission mode of the AP node transmission are judged to be effective within a period of time after the switching is completed, the AP node transmission is automatically retracted to the active open loop network. The high-power node HPN has wider signal coverage range and larger network bearing capacity, and meanwhile, the high-power node HPN comprises feedback signaling, so that the reliability in the transmission process can be ensured, the whole switching process is simple in steps, and the low-delay characteristic of the active open-loop network is met to the greatest extent.

It should be noted that the high-power node may be a high-power relay access node. Compared with a common AP node, the high-power node has stronger uplink and downlink data bearing capacity and wider signal coverage range, and also has the capacity of receiving and transmitting a plurality of data packets simultaneously.

It should be understood that the preset node switching condition may be a preset condition to be met when switching the access node associated with the user terminal. In this embodiment, the preset node switching condition may be that the received signal strength of the data receiving end is lower than a preset threshold, and the data error rate is higher than a preset threshold, where the preset threshold may be set according to the actual requirement, which is not limited in this embodiment.

It may be appreciated that the above-mentioned idle access node may be another access node in the active open loop network, which is located near the user terminal and may perform data transmission, and in this embodiment, the anchor node may provide connection suggestions for the user terminal through a machine learning method based on mobility prediction or other special situations, so that the user terminal determines a suitable idle access node in the active open loop network based on the connection suggestions provided by the anchor node.

In a specific implementation, since the data transmission includes uplink data transmission and downlink data transmission, the corresponding access node handover in this embodiment also includes uplink handover and downlink handover. The determining whether to perform uplink handover or downlink handover may be performed by adopting a burst triggering determination manner, specifically, the burst triggering determination manner corresponding to the uplink handover refers to determining whether to trigger node handover according to a preset node handover condition when the user terminal receives downlink data from the AP; the bursty trigger judgment mode corresponding to downlink handover refers to determining whether to trigger node handover according to a preset node handover condition when the AN receives data from the AP, wherein the principle of trigger judgment is as follows: and if at least one of the received signal strength in the preset node switching condition is lower than a preset threshold value and the data error rate is higher than the preset threshold value is met, triggering the subsequent access node switching operation. After triggering the access node handover operation, the idle access node may be determined by the anchor node based on the connection suggestion of the user terminal and the access node provided by the mobility prediction.

Step S20: and associating the user terminal with the idle access node.

Step S30: and when the association is completed, judging whether the idle access node triggers the preset node switching condition.

After determining the idle access node in the active open loop network, the ue may be associated with the idle access node for uplink handover, and determine whether the association of the ue and the idle access node still triggers a preset node handover condition; in addition, for downlink switching, whether other AP nodes with better quality are available at the user side or not can be judged according to the prior knowledge and the position prediction for the user movement by the anchor node and the preset node switching condition, namely whether the AP nodes with better quality possibly trigger the preset node switching condition is judged.

Step S40: if yes, switching the associated node of the user terminal into the high-power node, and carrying out data transmission through the high-power node.

It should be understood that the above-mentioned association node is a node associated with a user terminal in an active open loop network.

In a specific implementation, other access nodes in the active open loop network may trigger the preset node switching condition, and then the access node switching may be performed at this time, that is, the node associated with the user terminal is switched to a high-power node, and data transmission is performed through the high-power node. Specifically, for uplink handover, if the preset node handover condition is still triggered after the user terminal is associated with the idle access node, the user terminal may decide to start node handover, and at this time, the node associated with the user terminal may be switched to a high-power node, and data transmission is performed through the high-power node; for downlink switching, if the anchor node judges that no access node with better quality exists, the anchor node can decide to start node switching, at the moment, the node associated with the user terminal can be switched to a high-power node, and data transmission is performed through the high-power node.

The embodiment discloses that when a current access node associated with a user terminal triggers a preset node switching condition, an anchor node determines an idle access node in an active open loop network, and the active open loop network comprises: the system comprises an anchor node, a high-power node and a plurality of access nodes; associating the user terminal with the idle access node; when the association is completed, judging whether the idle access node triggers a preset node switching condition or not; if yes, switching the associated node of the user terminal into a high-power node, and transmitting data through the high-power node; compared with the prior art that the conflict is reduced by replacing the AP node, the reliable transmission of the data cannot be guaranteed when the resource is short or the network load is extremely high, because the embodiment associates the user terminal with the idle access node when the current access node associated with the user terminal triggers the preset node switching condition and switches the associated node to the high-power node for data transmission when the idle access node triggers the preset node switching condition, the technical problem that the reliable transmission of the data cannot be guaranteed when the reliability of the open-loop transmission of the active open-loop network in the prior art is deteriorated is solved.

Referring to fig. 6, fig. 6 is a flowchart of a second embodiment of the data transmission method according to the present invention.

Based on the first embodiment, in order to ensure the reliability of the uplink data transmission, in this embodiment, the step S40 includes:

step S401: if yes, determining a trigger end of the node switching operation.

It should be noted that, the node switching operation may be an operation of switching a node associated with the ue. Accordingly, the trigger end of the node switching operation may be a terminal for triggering the node switching operation, and in this embodiment, the trigger end may include: a user terminal and an anchor node. The trigger end corresponding to the uplink switch may be a user terminal, and the trigger end corresponding to the downlink switch may be an anchor node.

Step S402: and if the trigger terminal is the user terminal, acquiring an available time-frequency resource from a preset available time-frequency resource table corresponding to the high-power node.

It should be understood that the preset available time-frequency resource table may be a table storing available time-frequency resources of the high power node. Accordingly, the available time-frequency resources may be time-frequency resources that may be used in the high-power node.

In a specific implementation, referring to fig. 7, fig. 7 is a signaling diagram of a user entering a coverage area of a high power node in a first embodiment of a data transmission method according to the present invention. As shown in fig. 7, when the ue first enters the network managed by the AN and has AN HPN, the AN may determine, according to the AP location or the mobility prediction, that the ue has entered the HPN coverage after receiving the uplink data sent by the ue through the AP, and immediately give a connection suggestion to the ue, where the connection suggestion may include a time-frequency resource division situation of the HPN, and after receiving the connection suggestion of the AN, the ue may establish AN HPN available time-frequency resource table (i.e., the preset available time-frequency resource table) in the local segment according to the connection suggestion.

Step S403: and sending a node switching request to the anchor node based on the available time-frequency resources by the idle access node, wherein the anchor node switches the associated node of the user terminal to the high-power node when receiving the node switching request.

It will be appreciated that the above node switch request may be a request for instructing the anchor node to switch the node associated with the user terminal to a high power node.

In a specific implementation, referring to fig. 8, fig. 8 is a signaling diagram of an uplink handover procedure in a second embodiment of the data transmission method according to the present invention. As shown in fig. 8, the uplink handover procedure in this embodiment may include handover preparation, handover execution, and backoff. In the handover preparation stage, if the ue finds that the current communication quality is poor based on the downlink data sent by the AP, it may search and associate with a nearby AP, and perform connection quality judgment, that is, judge whether the associated AP triggers a preset node handover condition, and if the associated AP triggers the preset node handover condition, the ue may determine to perform a node handover operation, that is, the trigger end of the node operation is the ue. In the switching execution stage, if it is decided to perform the node switching operation for the ue, a part of resources (i.e., the above-mentioned available time-frequency resources) may be randomly selected from the local HPN available time-frequency resource table, and a node switching request may be sent to the AP node, where the request may include a user identifier and selected HPN information, and at the same time, the ue may start to switch to a sending mode that may be connected to the HPN (i.e., switch to a transmission mode), and then the AP may forward the node switching request to the AN, and after receiving the node switching request, the AN may start to monitor a channel according to the HPN information and prepare to receive data from the corresponding HPN, thereby implementing switching of the node associated with the ue to a high-power node.

Step S404: and when the switching is finished, sending data to be transmitted to the high-power node through the user terminal based on the target available time-frequency resource in the available time-frequency resource broadcast.

It should be noted that, the above broadcast of the available time-frequency resource may be a broadcast that is sent by the high-power node to the user terminal and carries the time-frequency resource available in the high-power node.

It should be understood that the target available time-frequency resource may be a part of time-frequency resources randomly selected from available time-frequency resource broadcast by the user terminal.

It can be appreciated that the data to be transmitted may be uplink data transmitted by the ue to the anchor node.

In a specific implementation, as shown in fig. 8, after the user equipment switches to a mode capable of connecting to the HPN, a part of time-frequency resources (i.e. the target available time-frequency resources) may be randomly selected from the HPN available time-frequency resource broadcast received last time, and the data to be transmitted (i.e. the uplink data in fig. 8) is directly sent to the HPN by adopting an open loop transmission manner, where the data includes the user identifier.

Step S405: and when the high-power node receives the data to be transmitted, performing multi-user conflict processing through the high-power node.

It should be noted that, the above multi-user collision processing may be processing of data collision caused by multi-user simultaneous switching. The multiuser collision processing in this embodiment may specifically be to determine whether the HPN of the received data is occupied, and if so, discard the data.

Further, in order to prevent the data transmitted in the uplink handover transmission process from being erroneous or incomplete, the step S405 includes: when the high-power node receives the data to be transmitted, judging whether the available time-frequency resources in the high-power node are occupied or not; if not, executing the step of judging whether the data to be transmitted is the correctly received data; or if yes, discarding the data to be transmitted through the high-power node.

In a specific implementation, referring to fig. 9, fig. 9 is a schematic flow chart of multi-user collision processing in a second embodiment of the data transmission method of the present invention. As shown in fig. 9, in the uplink handover transmission process, there may be multiple intelligent devices transmitting data packets to the HPN, so when the high power node receives data to be transmitted, it may be determined whether the time-frequency resource of the receiving end portion of the HPN is occupied, if not, the data to be transmitted is normally received; if yes, the data to be transmitted is directly discarded by the HPN.

Step S406: and when the processing is completed, judging whether the data to be transmitted is the correctly received data.

It should be appreciated that the correctly received data described above may be the complete data to be transmitted. The determining whether the data to be transmitted is the correctly received data may be determining whether the data to be transmitted received by the HPN is complete, if yes, determining that the data to be transmitted is the correctly received data.

In a specific implementation, as shown in fig. 9, after receiving the data to be transmitted, the HPN may verify and determine the integrity of the data packet, and if the data to be transmitted is complete data, determine that the data to be transmitted is correct received data, and for the correct received data, the HPN may send a receipt acknowledgement message to the user terminal; if the received data packet is found to be wrong or incomplete, the data packet is discarded, wherein the discarded data packet can be automatically retransmitted after the sending timer of the user terminal is overtime.

Step S407: if yes, the data to be transmitted are sent to the anchor node through the high-power node.

It will be appreciated that after determining that the data to be transmitted is correctly received, the HPN may divide the target available time-frequency resources for use by the user terminal and broadcast all users within its range once (e.g., HPN broadcast I in fig. 8).

In a specific implementation, after the HPN successfully and completely receives the data to be transmitted from the user terminal, the information of the user can be cached according to the user identifier in the HPN, the target available time-frequency resource is divided into the user (user terminal) for use, then AN acceptance confirmation signaling is sent to the user, meanwhile, the HPN also forwards the data to be transmitted to the AN, after the data is received, the AN can sort the data according to the user identifier and send AN acceptance confirmation signaling to the HPN, so that a complete uplink transmission switching process is realized, and the user terminal and the HPN node establish stable connection.

Further, in order to prevent the data transmission from being abnormal due to errors in the uplink handover transmission process, after step S404, the method further includes: starting a sending timer through the user terminal; correspondingly, the step S407 includes: if yes, dividing the target available time-frequency resources to the user terminal through the high-power node; when the division is completed, broadcasting the current available time-frequency resource information to all user terminals in the range of the target node; and when the broadcasting is finished, sending an acceptance confirmation signaling to the user terminal through the high-power node, and sending the data to be transmitted to the anchor node, wherein the user terminal terminates the sending timer when receiving the acceptance confirmation signaling.

The transmission timer may be a timer for counting the data to be transmitted.

It should be understood that the target node range may be the coverage of a high power node, which is not limited in this embodiment.

It may be appreciated that the above-mentioned currently available time-frequency resource information may be time-frequency resource information that may be used in the high-power node at the current time. In practical application, referring to fig. 10, fig. 10 is a broadcast signaling diagram of a high power node in a second embodiment of the data transmission method according to the present invention. As shown in fig. 10, when the HPN receives the data to be transmitted sent by the user terminal and determines that the data to be transmitted is complete, the HPN divides the part of the target available time-frequency resources into the users for use, that is, the part of the time-frequency resources are occupied (when the HPN downlink transmission is divided into the time-frequency resources by the AN, the operation is triggered). Meanwhile, the HPN may broadcast time-frequency resource information (e.g., HPN broadcast II in fig. 8) currently available to the HPN to all the user terminal devices within its range, so that other user devices may update the HPN available resource table of the local end according to the information, and if a handover operation needs to occur, may randomly select available time-frequency resources from the table, thereby avoiding users currently occupying the HPN from using the same time-frequency resources. The AN also records after receiving the broadcast message, and then if a switching instruction is sent, the AN can select from available time-frequency resources, so that the conflict of randomly selecting HPN time-frequency resources during switching of the user terminal can be avoided.

It may be appreciated that the above-mentioned acknowledgement signaling may be signaling that the high power node sends to the user terminal after dividing the target available time-frequency resource into the user terminal.

In a specific implementation, referring to fig. 11, fig. 11 is a schematic diagram of automatic retransmission after the triggering timer expires in the second embodiment of the data transmission method of the present invention. As shown in fig. 11, when the user terminal sends data to be transmitted to the HPN, a sending timer may be started, and after receiving an acknowledgement signaling of the HPN, the sending timer may be terminated, where various errors or multiuser collision processes may exist in the data transmission process, so that the user terminal correctly receives the acknowledgement information from the HPN, if the sending timer still does not receive the acknowledgement information from the HPN after reaching the preset time, the data packet is sent to the HPN again, and then the timer is restarted to return to zero and restart to count.

Further, in order to automatically fall back to the active open loop network when the AP node transmission is normal and the congestion relief and open loop transmission mode is valid, after the step S407, the method further includes:

step S407a: and detecting the node quality of all access nodes in the virtual cell where the user terminal is located in a periodic association mode, and determining the target access node of which the node quality meets the preset node quality condition.

The periodic association may be a manner in which the ue periodically performs active association with a nearby access node.

It should be understood that the node quality may be a node quality determined according to a received signal strength and a data error rate corresponding to when a user terminal associates with a certain node.

It can be understood that the above-mentioned preset node quality condition may be that the received signal strength is higher than a preset threshold, and the data error rate is lower than a preset threshold, where the preset threshold may be set according to the actual requirement, which is not limited in this embodiment.

It should be understood that the target access node may be an access node whose node quality meets a preset node quality condition. In practical application, in the process of transmitting data through the HPN, a user may periodically perform active association with nearby access nodes (all access nodes in the virtual cell where the user terminal is located), when it is found that the node quality of the target access node meets the requirement that the received signal strength is higher than a preset threshold, and the data error rate is lower than the preset threshold, it indicates that the node quality of the target access node is better, at this time, the user terminal may perform a rollback operation, that is, rollback the transmission mode to the target access node.

Step S407b: and sending target transmission data to the target access node through the user terminal, wherein the target transmission data carries a rollback request and an ending identifier.

It should be noted that, the target transmission data may be data transmitted by the ue to the anchor node after performing the rollback operation.

It should be appreciated that the above-described fallback request may be a request for instructing the anchor node to switch the associated node of the user terminal to the access node.

It will be appreciated that the end identifier described above may be an identifier for disconnecting from a high power node.

Step S407c: transmitting the target transmission data to the anchor node through the target access node, and transmitting an information release notification to the high-power node by the anchor node according to the rollback request and the ending identifier;

Note that the above information release notification may be a notification for instructing the high power node to release the context information of the user terminal. In practical application, as shown in fig. 10, in the uplink transmission flow, if the target available time-frequency resource of the HPN is continuously occupied by the user, and the user terminal generates a rollback operation to enable the AN to send a user context release signaling (i.e. the information release notification) to the HPN, at this time, the HPN may release the time-frequency resource and the user information that are occupied in the portion, and rebroadcast updated available time-frequency resource information to all devices in a range, and these user devices and the AN receive and record. Wherein, each time the HPN takes place to occupy or remove the occupation, can broadcast the operation, in order to guarantee the terminal equipment in HPN coverage area to possess the latest HPN to occupy the information.

In a specific implementation, as shown in fig. 8, if a user periodically actively associates with a nearby AP and performs quality detection, after detecting that a target access node satisfying a preset node quality condition exists, it may decide to fall back to the AP for transmission. At this time, the open loop transmission can be directly performed according to the selected target access node, and at this time, the user terminal can send the target transmission data to the target access node, where the target transmission data may carry the identity of the user, the rollback request and the end identifier for disconnecting the connection with the HPN, and at the same time, the user terminal itself may actively disconnect the connection with the HPN. After receiving the target transmission data, the target access node AP may forward the target transmission data to the AN, where the AN receives the data from the AP node and recognizes the data according to the user id, and may send AN information release notification carrying a user context release message to the HPN according to the rollback request and the end id, so as to notify the HPN to release the context information of the user. After receiving the information release notification, the HPN may release the resources occupied by the user, delete the user information therein, and then broadcast the updated current available time-frequency resource information to all terminal devices within its coverage area.

The embodiment discloses that if a trigger end of a node switching operation is a user terminal, an available time-frequency resource is obtained from a preset available time-frequency resource table corresponding to a high-power node, and a node switching request is sent to an anchor node through an idle access node based on the available time-frequency resource, so that an associated node of the user terminal is switched to the high-power node, data to be transmitted is sent to the high-power node when switching is completed, multiuser conflict processing is performed through the high-power grounding, and when processing is completed, whether the data to be transmitted is correct received data is judged, if yes, the data to be transmitted is sent to the anchor node through the high-power node, so that reliability of uplink data transmission can be ensured. Meanwhile, whether the available time-frequency resources in the high-power node are occupied or not is judged when the high-power node receives the data to be transmitted, and the data to be transmitted are discarded when the available time-frequency resources are occupied, so that the integrity of the data to be transmitted can be ensured.

Referring to fig. 12, fig. 12 is a flowchart of a third embodiment of a data transmission method according to the present invention.

Based on the above embodiments, in order to ensure the reliability of the downlink data transmission, in this embodiment, after step S401, the method further includes:

Step S401a: and if the trigger end is the anchor node, sending a node switching instruction to the user terminal through the idle access node, and switching the associated node to the high-power node when the user terminal receives the node switching instruction.

It should be noted that, the node switching instruction may be an instruction for instructing the ue to perform node switching.

In a specific implementation, referring to fig. 13, fig. 13 is a signaling diagram of a downlink handover procedure in a third embodiment of the data transmission method according to the present invention. As shown in fig. 13, the downlink handover procedure in this embodiment may include handover preparation, handover execution, and backoff. In the handover preparation stage, if the AN finds that the current communication quality is poor based on the uplink data sent by the AP, the occupancy condition of the AP nodes around the user may be evaluated to determine whether other AP nodes with better quality are available at the user side, and if it is determined that no AP node with better quality is found, the AN will decide to start handover, i.e. the trigger end operated by the node is the anchor node. In the switching execution stage, if the node switching operation is decided to be performed for the AN, the anchor node can select a corresponding HPN node, wherein, the AN is used as a server to have real-time occupation condition information and calculation capability about the HPN, so that the AN can plan time-frequency resources and channel resources of part of the HPNs in advance to provide services for users. The AN may then send a node switch instruction and the selected HPN related information (including time-frequency resource and channel resource information) to the AP to inform the AP of the node switch. After receiving the node switching instruction, the AP can forward the node switching instruction and the HPN related information to the intelligent equipment of the corresponding user terminal, the intelligent equipment starts to switch the transmission mode according to the received node switching instruction and the HPN related information, starts to monitor the corresponding channel to wait for receiving the data packet, and the user terminal successfully switches the associated node to a high-power node at the moment.

Step S401b: and when the switching is finished, sending target data to be transmitted and a data transmission instruction to the high-power node through the anchor node, wherein the data transmission instruction carries target time-frequency resources.

It should be understood that the target data to be transmitted may be downlink data transmitted by the anchor node to the user terminal.

It is understood that the data transmission instruction may be an instruction for instructing the high power node to start data transmission.

It should be noted that, the target time-frequency resource may be a time-frequency resource used for transmitting the target data to be transmitted. In practical application, after the anchor node decides to initiate the handover, the anchor node may send the target data to be transmitted to the selected HPN after a small delay, where the portion of data also includes user identification information, and inform the HPN to reserve the time-frequency resource and the channel resource planned by the AN for serving the user.

Step S401c: and when the high-power node receives the data transmission instruction, the high-power node sends the target data to be transmitted to the user terminal according to the target time-frequency resource.

In a specific implementation, as shown in fig. 13, after receiving data, the HPN may automatically send the target data to be transmitted according to the divided target time-frequency resources by the user terminal, occupy the part of the time-frequency resources, and broadcast the HPN time-frequency resources once for all other users in the coverage area (the same as in the uplink handover procedure).

Further, in order to ensure complete transmission of the downlink data, after the step S401c, the method further includes: carrying out integrity check on the target data to be transmitted through the user terminal; and if the target data to be transmitted is complete data to be transmitted, sending a target acceptance confirmation signaling to the high-power node through the user terminal so as to establish connection between the user terminal and the high-power node.

It should be appreciated that the integrity check described above may be a check to detect whether the target data to be transmitted is complete.

It may be appreciated that the target acceptance acknowledgement signaling may be an acknowledgement signaling sent by the ue to the high power node when receiving the complete target data to be transmitted.

In a specific implementation, as shown in fig. 13, when the user terminal receives the target data to be transmitted, the integrity of the target data to be transmitted may be checked, and a target acceptance confirmation signaling is sent to the HPN, where the user terminal establishes a stable connection with the HPN node. After receiving the target acceptance confirmation signaling, the HPN may send the confirmation information to the AN, where the downlink handover procedure ends, and in a later period of time, the data transmission between the user terminal and the AN may be performed by the HPN node. After that, in the process of transmitting data through the HPN, the user periodically performs active association with the nearby AP node, and when the quality of the AP node is found to meet the preset node quality condition (the received signal strength is higher than the preset threshold value, and the data error rate is lower than the preset threshold value), the user performs a rollback operation, that is, the transmission mode is rolled back to the AP. Specifically, after determining the rollback operation, the user terminal directly performs open loop transmission according to the selected AP node (i.e., the AP node whose node quality meets the preset node quality condition), and sends data to the selected AP node, where the portion of data includes an identity of the user, a rollback request, and an end identifier for disconnecting from the HPN, and actively disconnects from the HPN; when the AP node receives the data sent by the user terminal, the AP node can forward the data to the AN; after receiving the data from the AP node and identifying the data according to the user identity, the AN can send a context release message of the user to the HPN according to the rollback request and the end identity so as to inform the HPN of releasing the context information of the user; after receiving the context release message, the HPN releases the resources occupied by the user, deletes the user information thereon, and then broadcasts the available time-frequency resource information to all users in the coverage area thereof, so that the transmission mode is completely retracted to the active open loop network, and the whole flow is ended.

The embodiment discloses that if the trigger end is an anchor node, a node switching instruction is sent to the user terminal through an idle access node, so that the user terminal switches the associated node to a high-power node, when the switching is completed, the anchor node sends target data to be transmitted and a data transmission instruction to the high-power node, and the high-power node sends the target data to be transmitted to the user terminal according to target time-frequency resources, so that the reliability of downlink data transmission is ensured. Meanwhile, in the embodiment, integrity check is carried out on the target data to be transmitted through the user terminal; if the target data to be transmitted is complete data to be transmitted, a target acceptance confirmation signaling is sent to the high-power node through the user terminal so as to establish connection between the user terminal and the high-power node, and therefore complete transmission of downlink data can be guaranteed.

In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a data transmission program, and the data transmission program realizes the steps of the data transmission method when being executed by a processor.

Referring to fig. 14, fig. 14 is a block diagram of a first embodiment of a data transmission device according to the present invention.

As shown in fig. 14, a data transmission apparatus according to an embodiment of the present invention includes:

a node determining module 501, configured to determine, by an anchor node, an idle access node in an active open-loop network when a current access node associated with a user terminal triggers a preset node handover condition, where the active open-loop network includes: the anchor node, the high-power node and the access nodes;

a node association module 502, configured to associate the user terminal with the idle access node;

a condition judging module 503, configured to judge whether the idle access node triggers the preset node switching condition when association is completed;

and the data transmission module 504 is configured to switch the associated node of the ue to the high-power node if yes, and perform data transmission through the high-power node.

The data transmission device of this embodiment discloses that when a current access node associated with a user terminal triggers a preset node switching condition, an anchor node determines an idle access node in an active open loop network, where the active open loop network includes: the system comprises an anchor node, a high-power node and a plurality of access nodes; associating the user terminal with the idle access node; when the association is completed, judging whether the idle access node triggers a preset node switching condition or not; if yes, switching the associated node of the user terminal into a high-power node, and transmitting data through the high-power node; compared with the prior art that the conflict is reduced by replacing the AP node, the reliable transmission of the data cannot be guaranteed when the resource is short or the network load is extremely high, because the embodiment associates the user terminal with the idle access node when the current access node associated with the user terminal triggers the preset node switching condition and switches the associated node to the high-power node for data transmission when the idle access node triggers the preset node switching condition, the technical problem that the reliable transmission of the data cannot be guaranteed when the reliability of the open-loop transmission of the active open-loop network in the prior art is deteriorated is solved.

Based on the above-described first embodiment of the data transmission device of the present invention, a second embodiment of the data transmission device of the present invention is proposed.

In this embodiment, the data transmission module 504 is further configured to determine a trigger end of the node switching operation if the data transmission module is positive; if the trigger terminal is the user terminal, acquiring an available time-frequency resource from a preset available time-frequency resource table corresponding to the high-power node; transmitting a node switching request to the anchor node based on the available time-frequency resources through the idle access node, wherein the anchor node switches the associated node of the user terminal to the high-power node when receiving the node switching request; when the switching is completed, transmitting data to be transmitted to the high-power node through the user terminal based on target available time-frequency resources in available time-frequency resource broadcasting; when the high-power node receives the data to be transmitted, multi-user conflict processing is carried out through the high-power node; when the processing is completed, judging whether the data to be transmitted is the correctly received data or not; if yes, the data to be transmitted are sent to the anchor node through the high-power node.

Further, the data transmission module 504 is further configured to start a transmit timer through the user terminal; if yes, dividing the target available time-frequency resources to the user terminal through the high-power node; when the division is completed, broadcasting the current available time-frequency resource information to all user terminals in the range of the target node; and when the broadcasting is finished, sending an acceptance confirmation signaling to the user terminal through the high-power node, and sending the data to be transmitted to the anchor node, wherein the user terminal terminates the sending timer when receiving the acceptance confirmation signaling.

Further, the data transmission module 504 is further configured to determine, when the high power node receives the data to be transmitted, whether the available time-frequency resource in the high power node is occupied; if not, executing the step of judging whether the data to be transmitted is the correctly received data; or if yes, discarding the data to be transmitted through the high-power node.

Further, the data transmission module 504 is further configured to detect, by using a periodic association manner, node qualities of all access nodes in a virtual cell where the user terminal is located, and determine a target access node where the node quality meets a preset node quality condition; transmitting target transmission data to the target access node through the user terminal, wherein the target transmission data carries a rollback request and an ending identifier; transmitting the target transmission data to the anchor node through the target access node, and transmitting an information release notification to the high-power node by the anchor node according to the rollback request and the ending identifier; and when the high-power node receives the information release notification, releasing the context information of the user terminal, and broadcasting updated current available time-frequency resource information to all the user terminals.

Based on the above-described respective device embodiments, a third embodiment of the data transmission device of the present invention is proposed.

In this embodiment, the data transmission module 504 is further configured to send a node switching instruction to the ue through the idle access node if the trigger end is the anchor node, where the ue switches an associated node to the high-power node when receiving the node switching instruction; when the switching is completed, sending target data to be transmitted and a data transmission instruction to the high-power node through the anchor node, wherein the data transmission instruction carries target time-frequency resources; and when the high-power node receives the data transmission instruction, the high-power node sends the target data to be transmitted to the user terminal according to the target time-frequency resource.

Further, the data transmission module 504 is further configured to perform integrity check on the target data to be transmitted through the user terminal; and if the target data to be transmitted is complete data to be transmitted, sending a target acceptance confirmation signaling to the high-power node through the user terminal so as to establish connection between the user terminal and the high-power node.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. 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 system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but 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 stored in a storage medium (e.g. read-only memory/random-access memory, magnetic disk, optical disk), comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.

The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims

1. A data transmission method, the data transmission method comprising:

associating the user terminal with the idle access node;

2. The data transmission method according to claim 1, wherein if yes, the step of switching the association node of the ue to the high power node and performing data transmission through the high power node includes:

If yes, determining a trigger end of node switching operation;

3. The data transmission method as claimed in claim 2, wherein the step of performing multi-user collision processing by the high power node when the high power node receives the data to be transmitted, comprises:

or if yes, discarding the data to be transmitted through the high-power node.

4. The data transmission method as claimed in claim 2, wherein after the step of transmitting data to be transmitted to the high power node by the user terminal based on the target available time-frequency resource in the available time-frequency resource broadcast when the handover is completed, further comprising:

starting a sending timer through the user terminal;

5. The method of data transmission according to claim 4, wherein after the step of sending the data to be transmitted to the anchor node by the high power node if the data to be transmitted is transmitted to the anchor node, the method further comprises:

6. The method for data transmission according to claim 2, wherein after the step of determining the trigger end of the node switching operation if yes, further comprises:

7. The data transmission method according to claim 6, wherein after the step of sending the target data to be transmitted to the user terminal by the high power node according to the target time-frequency resource, the method further comprises:

8. A data transmission apparatus, the apparatus comprising:

9. A data transmission apparatus, the apparatus comprising: a memory, a processor and a data transmission program stored on the memory and executable on the processor, the data transmission program being configured to implement the steps of the data transmission method according to any one of claims 1 to 7.

10. A storage medium having stored thereon a data transmission program which, when executed by a processor, implements the steps of the data transmission method according to any one of claims 1 to 7.