CN117202111A

CN117202111A - Data transmission method and device, storage medium and electronic equipment

Info

Publication number: CN117202111A
Application number: CN202210592977.1A
Authority: CN
Inventors: 吴海波; 毕奇; 张婷; 卢燕青; 李宝荣
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2023-12-08

Abstract

The disclosure relates to the technical field of communication, and relates to a data transmission method, a data transmission device and a storage medium, which are applied to relay nodes in a D2D communication group, wherein the relay nodes are used for constructing the D2D communication group based on own current link transmission condition information and terminals in a corresponding group through autonomous decision, and the method comprises the following steps: distributing a transmission time slot for the terminal in the relay node corresponding group according to the interference condition information between the Wireless Local Area Networks (WLAN) of the terminal in the relay node corresponding group; and determining transmission power information matched with the transmission time slot of each terminal based on the terminal node characteristics and the data transmission characteristics of the terminals in the corresponding group of the relay node, and carrying out data transmission according to the transmission time slot and the transmission power information in the current scheduling period. The embodiment of the disclosure can improve the transmission efficiency of WLAN data and improve the service experience.

Description

Data transmission method and device, storage medium and electronic equipment

Technical Field

The present disclosure relates to the field of communication technologies, and more particularly, to a data transmission method, a data transmission device, a storage medium, and an electronic apparatus.

Background

With the development of communication technology, D2D communication technology (Device to Device Communication) becomes a more flexible communication method. The D2D communication technology refers to a communication manner in which two peer user nodes communicate with each other, and in a distributed network formed by D2D communication users, each user node can send and receive signals, and the user nodes play roles of a server and a client at the same time.

In the related art, through the transmission mode of the D2D communication technology, the terminals in the D2D communication group are distributed in high density, the relay node is used as a sink node for multi-terminal transmission tasks, and the data transmission efficiency of the relay node WLAN (Wireless Local Area Network ) is one of key factors affecting the Wi-Fi D2D service transmission efficiency of the wireless network communication.

It should be noted that the information of the present invention in the above background section is only for enhancing understanding of the background of the present disclosure, and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The disclosure aims to provide a data transmission method and device, a computer storage medium and an electronic device, so as to improve WLAN data transmission efficiency of a D2D communication group at least to a certain extent.

Other features and advantages of the present disclosure will be apparent from the following detailed description, or may be learned in part by the practice of the disclosure.

According to an aspect of the present disclosure, there is provided a data transmission method applied to a relay node in a device-to-device D2D communication group, the relay node being configured to establish the D2D communication group with a terminal in a corresponding group via autonomous decision based on its current link transmission condition information, the method comprising:

Distributing a transmission time slot for the terminal in the relay node corresponding group according to the interference condition information between the Wireless Local Area Networks (WLAN) of the terminal in the relay node corresponding group;

and determining transmission power information matched with the transmission time slot of each terminal based on the terminal node characteristics and the data transmission characteristics of the terminals in the corresponding group of the relay node, and carrying out data transmission according to the transmission time slot and the transmission power information in the current scheduling period.

In an exemplary embodiment of the present disclosure, the allocating a transmission time slot for the terminal in the relay node corresponding group according to the interference condition information between the WLAN of the terminal in the relay node corresponding group includes:

constructing an interference graph model according to interference condition information among Wireless Local Area Networks (WLAN) of the terminal in the corresponding group of the relay node;

and based on the interference graph model, allocating transmission time slots for the terminals in the relay node corresponding group by taking the minimum interference degree among the WLAN as a criterion.

In an exemplary embodiment of the present disclosure, the determining, based on terminal node characteristics and data transmission characteristics of terminals in the relay node corresponding group, transmission power information of each of the terminals that matches the transmission time slot, and performing data transmission according to the transmission time slot and the transmission power information in a current scheduling period includes:

Constructing a terminal priority measurement model according to the terminal node characteristics and the data transmission characteristics;

determining the transmission priority of the terminal in the group corresponding to the relay node based on the terminal priority measurement model;

and according to the transmission priority, determining the user group information of the terminal in the relay node corresponding group in the transmission time slot, determining the transmission power information matched with the user group information, and carrying out data transmission according to the transmission time slot, the user group information and the transmission power information in the current scheduling period so as to realize the minimum interference degree among the WLAN.

In an exemplary embodiment of the present disclosure, when any one of the transmission slots corresponds to one or more terminals, determining, according to the transmission priority, user group information of the terminal in the relay node corresponding group in the transmission slot, and determining transmission power information matched with the user group information, and performing data transmission according to the transmission slot, the user group information and the transmission power information in a current scheduling period, so as to implement minimum interference among WLANs, where the method includes:

according to channel gain information of terminals to which a data packet buffer queue in a data transmission buffer zone belongs, distributing each terminal to a matched candidate terminal set corresponding to different gain levels, wherein the data packet buffer queue comprises at least one of a data packet buffer queue using a Wi-Fi uplink transmission link and a data packet buffer queue using a Wi-Fi downlink transmission link;

Determining a target matching terminal from a target matching candidate terminal set according to the target matching candidate terminal set to which the current terminal to be matched belongs, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal, wherein the current terminal to be matched is a terminal corresponding to the transmission time slot;

determining a transmission power coefficient of the terminal in the candidate user group in the transmission time slot according to the transmission priority and by taking the minimum interference degree between WLAN as a criterion;

and receiving and transmitting data to be transmitted of the terminals in the corresponding group in the current scheduling period based on the transmission power coefficient.

In an exemplary embodiment of the present disclosure, terminals to which a data packet buffer queue in the data transmission buffer area belongs are allocated to a first set, a second set and a third set corresponding to different gain levels according to channel gain values, where gain levels of the first set, the second set and the third set are sequentially increased, and a channel gain value corresponding to a set of a high gain level is greater than a channel gain value corresponding to a set of a low gain level;

the determining a target matching terminal from the matching candidate terminal set according to the target matching candidate terminal set to which the current terminal to be matched belongs, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal, including:

The terminals in the first set, the second set and the third set are respectively sequenced according to the sequence from the small channel gain value to the large channel gain value, and a first sequence, a second sequence and a third sequence are respectively obtained;

if the current terminal to be matched belongs to a second set, acquiring a first terminal corresponding to a minimum channel gain value in the first sequence, and acquiring a second terminal corresponding to a maximum channel gain value in the third sequence, and constructing the candidate user group according to the current terminal to be matched, the first terminal and the second terminal;

if the current terminal to be matched belongs to the first set, acquiring a third terminal corresponding to the maximum channel gain value in the third sequence, and constructing the candidate user group according to the current terminal to be matched and the third terminal; and if the current terminal to be matched belongs to the third set, acquiring a fourth terminal corresponding to the minimum channel gain value in the first sequence, and constructing the candidate user group according to the current terminal to be matched and the fourth terminal.

In an exemplary embodiment of the present disclosure, the determining, according to a target matching candidate terminal set to which a current terminal to be matched belongs, a target matching terminal from the matching candidate terminal set, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal, further includes:

According to the interference graph model, if the transmission interference exists among the terminals in the candidate user group, adjusting the candidate user group members by taking the minimum interference degree among WLAN as a criterion; or alternatively

According to the interference graph model, if the transmission interference exists among the terminals in the candidate user group, adjusting the transmission power among the terminals in the candidate user group in the current scheduling period by taking the minimum interference degree among WLAN as a criterion; or alternatively

When the target terminal in the candidate user group is simultaneously accessed to a plurality of relay nodes, according to the interference graph model, if the transmission interference exists between the target terminal in the candidate user group and each terminal, the transmission strategy of the transmission link between the target terminal with the interference and the target relay node is adjusted by taking the minimum interference degree between WLAN as a criterion.

In an exemplary embodiment of the present disclosure, the method further comprises:

determining the data packet priority of the data packet to be sent according to the characteristics of the data packet to be transmitted and the channel state information for each terminal in the corresponding group of the relay node;

and under the constraint of the transmission priority, determining the transmission power of the data packet to be transmitted according to the data packet priority by taking the minimum interference degree among the WLANs as a criterion.

In an exemplary embodiment of the disclosure, the relay node is a relay terminal or an access terminal of a relay terminal in the D2D communication group, where the access terminal of the relay terminal accesses a corresponding relay terminal in a Client role;

the relay node establishes the D2D communication group with the terminal in the corresponding group through autonomous decision based on the current link transmission condition information of the relay node, and the relay node comprises:

the relay node determines service quality information matched with the service level of the relay node according to the current link transmission condition information;

and determining a current request processing state according to the service quality information, and initiating an access flow with a terminal to be accessed by combining the current request processing state and the service quality information to construct the D2D communication group.

In an exemplary embodiment of the present disclosure, the determining a current request processing state according to the quality of service information, and initiating an access procedure with the terminal to be accessed to establish the D2D communication group in combination with the current request processing state and the quality of service information, includes:

receiving access request information sent by the terminal to be accessed, and if the service quality information meets a preset threshold condition, feeding back access request response information to the terminal to be accessed, so that the terminal to be accessed determines the accessed relay node according to the service quality information of the relay node corresponding to the received request response information;

And initiating an access flow with the terminal to be accessed to construct the D2D communication group.

The terminal to be accessed determines the accessed relay node from the relay node corresponding to the received request response information through autonomous decision according to the corresponding value of the service quality information of the relay node corresponding to the received request response information.

According to an aspect of the present disclosure, there is provided a data transmission apparatus applied to a relay node in a device-to-device D2D communication group, the relay node constructing the D2D communication group with a corresponding intra-group terminal via autonomous decision based on its current link transmission condition information, the apparatus comprising: a transmission time slot scheduling module, configured to allocate a transmission time slot to the terminal in the relay node corresponding group according to interference condition information between WLANs of the terminal in the relay node corresponding group; and the data transmission scheduling module is used for determining the transmission power information matched with the transmission time slot of each terminal based on the terminal node characteristics and the data transmission characteristics of the terminals in the relay node corresponding group, and carrying out data transmission according to the transmission time slot and the transmission power information in the current scheduling period.

According to one aspect of the present disclosure, there is provided a computer storage medium having stored thereon a computer program which, when executed by a processor, implements the method of any of the above.

According to one aspect of the present disclosure, there is provided an electronic device including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the method of any of the above via execution of the executable instructions.

According to the data transmission method in the exemplary embodiment of the disclosure, after the relay terminal or the terminal in the D2D communication group is accessed to the D2D communication group, the relay terminal or the terminal and the terminal to be accessed to the D2D communication group are autonomously decided to construct the D2D communication group according to the current link transmission condition information of the relay terminal or the terminal, so that relay services with high signal to interference plus noise ratio SINR, high receiving power, low load and low historical interruption probability are provided for the preference of the adjacent terminal user. After the D2D communication group is established, the relay node distributes transmission time slots for the terminals according to the interference condition information among the WLANs of the terminals in the corresponding group, and aims to minimize the interference degree among the WLANs of service users in the current scheduling period. And then according to the characteristics of the terminal nodes and the data transmission characteristics, determining transmission power information matched with the terminals in the relay node corresponding group in the allocated transmission time slots by taking the minimum interference degree between WLAN as a criterion, and realizing the transmission scheduling of receiving and transmitting data. According to the embodiment of the disclosure, based on the knowledge of the interference condition among the WLAN, the optimal transmission time and transmission power distribution with minimum interference among the WLAN systems and maximum throughput when each terminal is scheduled by the relay node are searched, so that the transmission efficiency of Wi-Fi D2D service is improved, and the service experience is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings, in which:

fig. 1 illustrates a flowchart of a data transmission method according to an exemplary embodiment of the present disclosure;

fig. 2 illustrates an architectural diagram of a D2D communication group according to an exemplary embodiment of the present disclosure;

fig. 3 illustrates a flow chart of a method of constructing a D2D communication group according to an exemplary embodiment of the present disclosure;

fig. 4 illustrates an architectural diagram of a D2D communication group according to an exemplary embodiment of the present disclosure;

fig. 5 illustrates a flowchart for scheduling data transmission in a current scheduling period under the constraint of transmission priority, with minimum inter-WLAN interference priority as a criterion, according to an exemplary embodiment of the present disclosure;

fig. 6 illustrates a flow chart for constructing candidate user groups under transmission priority constraints based on minimum inter-WLAN interference priority;

Fig. 7 is a flowchart illustrating an implementation of the relay node performing optimized transmission of data packets to be transmitted in the candidate user group under the constraint of minimum interference priority and transmission power between WLANs according to an exemplary embodiment of the present disclosure;

fig. 8 illustrates an architecture diagram of a data transmission apparatus according to an exemplary embodiment of the present disclosure;

FIG. 9 illustrates a schematic diagram of a storage medium according to an exemplary embodiment of the present disclosure; and

fig. 10 shows a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

Detailed Description

Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, or in one or more software-hardened modules, or in different networks and/or processor devices and/or microcontroller devices.

In the related art in the field, D2D, i.e. terminal through, refers to a communication manner in which two peer user nodes directly communicate with each other. In a decentralized network of D2D communication subscribers, each subscriber node is capable of transmitting and receiving signals and has the function of automatic routing (forwarding messages). Participants of the network share some of the hardware resources they own, including information processing, storage, and network connectivity. These shared resources provide services and resources to the network that can be accessed directly by other users without going through intermediate entities. In a D2D communication network, user nodes act as both servers and clients, and users can recognize each other as being present, and form a virtual or actual group in an ad hoc manner.

Wi-Fi (wireless network communication technology) D2D communication group refers to user nodes in the D2D communication group implementing networking over a WLAN (Wireless Local Area Network ) network and transmitting WLAN data. The air interface protocol of the WLAN network core is CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance ), which is implemented by avoiding data transmission collision between stations, that is, detecting whether a transmission channel is Busy (Busy) before data transmission, if the transmission channel Busy, the sender can retransmit with random waiting time. When terminals in the Wi-Fi D2D communication group are distributed in high density, common-frequency interference caused by WLAN data transmission among the terminals is easy to cause, the multi-terminal node gathers data transmission tasks on the relay node, the problem that the data to be transmitted is retransmitted and retransmitted after collision caused by the fact that the multi-terminal node detects the same idle channel resource simultaneously and then transmits the data is caused occurs, and when different relay nodes in the D2D communication group schedule the terminals in the corresponding group, the inter-WLAN transmission interference of the same time slot exists, so that the data transmission efficiency of the Wi-Fi D2D communication group is greatly reduced.

Based on this, in an exemplary embodiment of the present disclosure, a data transmission method is provided first, which is applied to a relay node in a device-to-device D2D communication group, where the relay node is based on its current link transmission condition information, and establishes a D2D communication group with a terminal in a corresponding group via autonomous decision. Referring to fig. 1, the data transmission method includes the steps of:

Step S110: distributing a transmission time slot for the terminal in the relay node corresponding group according to the interference condition information between the Wireless Local Area Networks (WLAN) of the terminal in the relay node corresponding group;

step S120: determining transmission power information matched with the transmission time slot of each terminal based on terminal node characteristics and data transmission characteristics of the terminals in the corresponding group of the relay node, so as to perform data transmission according to the transmission time slot and the transmission power information in the current scheduling period;

First, a procedure of constructing a D2D communication group according to an embodiment of the present disclosure will be described. In the embodiment of the disclosure, in the area range, a terminal desiring to access to the D2D communication group obtains information of a plurality of relay terminals already in the D2D communication group or terminals of the D2D communication group accessed in the Client role through service discovery and information based on Wi-Fi D2D protocol. The Client role refers to a device that can be associated to GO (Group Owner) in the D2D communication group and cannot process the network protocol P2P protocol, as shown in fig. 2, which is a schematic diagram of an architecture of one D2D communication group according to an embodiment of the disclosure, for example, UE3 and UE4 are relay terminals in the D2D communication group, and for example, UE9 and UE7 are terminals in the D2D communication group that access the D2D communication group in the Client role.

Fig. 3 shows a flowchart of constructing a D2D communication group according to an exemplary embodiment of the present disclosure, and as shown in fig. 3, the process may include steps S310 and S320:

in step S310, the relay node determines quality of service information matching the service level of the relay node according to the current link transmission condition information.

In this exemplary embodiment, in order to provide relay services with high SINR, high received power, low load, and low historical outage probability for neighboring terminal users, a relay terminal or an access terminal of the relay terminal in the D2D communication group, after accessing the D2D communication group, obtains service quality information matching the service level of the relay node according to its current link condition information, such as transmission rate, delay, packet loss rate, throughput, and other relevant parameters affecting the service quality, such as providing QoS values (Quality of Service, service quality) corresponding to the service level of the relay node in the alternative.

In step S320, the current request processing state is determined according to the service quality information, and the access procedure with the terminal to be accessed is initiated in combination with the current request processing state and the service quality information, so as to construct the D2D communication group.

In this exemplary embodiment, the quality of service information may be compared with a preset threshold condition, and only if the quality of service information meets the preset threshold condition, the relay terminal or the access terminal serving as the alternative relay node may enter an access request state capable of receiving other terminals, and if the quality of service information does not meet the preset threshold condition, the relay terminal or the access terminal serving as the alternative relay node may enter a suspended access state, i.e. reject other devices from accessing, until the quality of service information itself meets the preset threshold condition.

Specifically, step S320 may include:

receiving access request information sent by a terminal to be accessed, and if the service quality information meets a preset threshold condition, feeding back access request response information to the terminal to be accessed, so that the terminal to be accessed determines an accessed relay node according to the service quality information of the relay node corresponding to the received request response information;

An access procedure with a terminal to be accessed is initiated to establish a D2D communication group.

If the relay terminal or the access terminal is in a suspended access state, broadcasting a Beacon frame, wherein the relay terminal or the access terminal receives a PB Request (Probe Request frame) sent by the to-be-accessed terminal, and the relay terminal or the access terminal does not reply to the PB Response frame (Probe Response frame); accordingly, if the relay terminal or the access terminal receives the SD Query frame (Service Discovery Query, service discovery request frame) sent by the access terminal, the relay terminal or the access terminal will not reply to the SD Response frame (Service Discovery Response, service discovery Response frame).

If the relay terminal or the access terminal is in the access request state, when the terminal to be accessed passes through the information in the Beacon frame, the PB Response frame which can be obtained can be searched, and the relay terminal or the access terminal corresponding to the PB Response frame has the service quality information meeting the preset threshold condition.

Further, the terminal to be accessed can determine the target relay node from the relay nodes corresponding to the received request Response information through autonomous decision according to the corresponding values of the relay terminals or the service quality information of the access terminals corresponding to the received PB Response frame, and access the target relay node.

For example, the relay node corresponding to the maximum value can be obtained as the relay of the terminal to be accessed according to the sequence from the big to the small of the corresponding value of the relay terminal or the service quality information of the access terminal corresponding to the received PB Response frame, so as to negotiate to initiate the access flow.

Continuing to refer to fig. 2, if the UE12 to be accessed between the UE5 and the UE4 sends a PB Request, searches for the UE2, the UE4 and the UE6 as the alternative access relay terminal through the information in the received Beacon frame, and can obtain PB Response frames replied by the three terminals, it is indicated that the quality of service information of the UE2, the UE4 and the UE6 meets a preset threshold condition, and is in the Request access state. Correspondingly, the UE12 does not receive the response frames of the UE3, the UE5 and the UE8, which indicates that the service quality information of the UE3, the UE5 and the UE8 does not meet the preset threshold condition, and the relay terminal is not used as an alternative access relay terminal and is in a suspended access state.

The corresponding values of the qos information of UE2, UE4 and UE6 are all greater than the preset quality threshold N, the magnitudes of the corresponding values of the qos information of the three terminals may be compared, and the terminal corresponding to the maximum value is obtained as a relay of the UE12 to be accessed, for example, the UE2 is taken as the relay (solid arrow connection) of the UE12 to be accessed if the UE2 is the maximum of the corresponding values of the qos information of UE2, UE4 and UE6, so as to negotiate to initiate the access procedure.

It should be noted that, when a certain relay terminal or an access terminal is in a suspended access state, if the service quality information of the certain relay terminal or the access terminal satisfies a preset condition in a subsequent data transmission process, the certain relay terminal or the access terminal may be converted from the suspended access state to an access request state, that is, the suspended access state and the access request state in the embodiments of the present disclosure are not absolute, but are dynamically adjusted according to the current self-link condition information (such as a transmission rate, a delay, a packet loss rate, a throughput, etc.) of the relay terminal or the access terminal, so as to provide a high SINR, a high received power, a low load, and a low historical outage probability for a terminal to be accessed.

In some possible embodiments, the UE12 may also access multiple relay nodes at the same time, as shown in fig. 4, where the specific access manner of the UE12 to the UE3 is the same as the procedure of the UE12 accessing to the UE2 through autonomous decision, and is not described herein.

In some possible embodiments, UE12 may also access UE2 for a first period of time and UE3 for a second period of time different from the first period of time; alternatively, the UE12 may access the UE2 and the UE3 at the same time in the first period, and the specific access manner is the same as the process that the UE12 accesses to the UE2 through autonomous decision, which is not described herein.

It should be noted that, in the process of accessing the UE12 to the relay node through the autonomous decision, the embodiment of the disclosure does not specifically limit the number of accesses of the UE12 to the relay node, and may determine the access mode through the autonomous decision according to the actual transmission scenario.

By the method for constructing the D2D communication group according to the present exemplary embodiment, the to-be-accessed terminal autonomously decides to construct the D2D communication group by service discovery and information acquisition in combination with link condition information of the relay terminal in the D2D communication group or the access terminal itself accessing the relay terminal in the Client role.

After a D2D communication group is established through autonomous decision-making through service discovery and information acquisition based on Wi-Fi D2D protocols, in an exemplary embodiment of the present disclosure, a data transmission method is provided that is applied to a relay node in a device-to-device D2D communication group. A data transmission method according to an exemplary embodiment of the present disclosure is explained below with reference to fig. 1.

In step S110, a transmission time slot is allocated to the terminal in the relay node corresponding group according to the interference condition information between the WLAN of the terminal in the relay node corresponding group.

In this exemplary embodiment, related information that the terminal in the relay node corresponding group has an influence on interference caused by terminal transmission, such as interference information, channel state information, traffic information, etc., may be obtained, so as to allocate a transmission time slot for the terminal in the relay node corresponding group according to the interference condition information.

The interference graph model can be constructed according to the interference condition information among the Wireless Local Area Networks (WLAN) of the terminals in the relay node corresponding group and the acquired information. Each vertex in the interference graph model is used for representing the current interference condition of the terminal in the group, and as the channel state, the service flow, the terminal position and the like of each terminal are changed, the current interference condition of the terminal is changed, and correspondingly, the positions of the vertices in the interference graph model are correspondingly adjusted.

The method can allocate transmission time slots for the terminals in the corresponding group of the relay node based on the interference graph model, namely, a scheduling strategy of each terminal is designed so as to minimize the interference among WLAN serving users in the current scheduling period, and the terminal with the minimum interference is conveniently scheduled in a certain time slot.

Based on the transmission interference condition information of the relay node corresponding to the terminals in the group, the transmission time slots are allocated to the terminals so as to determine the transmission time slots of the terminals under the condition of knowing the transmission interference, thereby realizing the minimum interference degree between the WLAN, and the interference graph model is constructed and used for assisting the relay node to know the interfered condition of the terminals in the group so as to manage the terminals in the group based on the interference graph model.

In step 120, based on the terminal node characteristics and the data transmission characteristics of the terminals in the relay node corresponding group, determining transmission power information of each terminal, which is matched with the transmission time slot, and performing data transmission according to the transmission time slot and the transmission power information in the current scheduling period.

In the present exemplary embodiment, the terminal node characteristics include relevant characteristics of wireless data transmission of the terminal node, where the relevant characteristics affect the wireless data transmission of the terminal node, such as terminal position coordinates, terminal moving speed, physical environment where the terminal is located, such as signals of the environment, magnetic fields, weather, etc., the data transmission characteristics include service characteristics (such as voice, video, text, etc.), message characteristics (such as message length, message matching object, etc.), data sources (such as terminal type, etc.), collision probability information, load type of the data packet, and data amount of the transmission data, etc., which all can be regarded as terminal node characteristics and data transmission characteristics of the embodiment of the present disclosure, and the specific contents of the terminal node characteristics and the data transmission characteristics are not particularly limited.

After obtaining the terminal node characteristics and the data transmission characteristics, the transmission power information of each terminal, which matches the transmission time slot, can be determined according to the characteristics. The terminal priority measurement model can be constructed according to the characteristics, and the transmission priority of the terminal in the relay node corresponding group can be determined based on the terminal priority measurement model.

It should be noted that, the terminal priority measurement model performs fusion processing on the terminal node characteristics and the data transmission characteristics to obtain a dynamic statistics result for reflecting the transmission priority of the terminal, and the dynamic statistics result of each terminal obtained based on the terminal priority measurement model is used for reflecting the transmission priority of the terminal in the current scheduling period, and is not fixed, and the terminal priority measurement model is dynamically adjusted along with the current terminal node characteristics and the data transmission characteristics.

According to the method and the device for transmitting the WLAN data, a terminal priority measurement model is built according to terminal node characteristics and data transmission characteristics, so that the transmission priority of the relay node corresponding to the terminal in the group in the current scheduling period is dynamically determined based on the terminal priority model, WLAN data transmission in the group is optimized under the constraint of the transmission priority of the terminal, the actual transmission condition and the data transmission requirement of the terminal are effectively fused to the transmission scheduling, and the WLAN data transmission efficiency is improved.

The method comprises the steps of determining user group information of a terminal in a corresponding group of the relay node in a transmission time slot according to a transmission priority, determining transmission power information matched with the user group information, and carrying out data transmission according to the transmission time slot, the user group information and the transmission power information in a current scheduling period so as to realize minimum interference among WLAN.

In the present exemplary embodiment, a power allocation method for maximizing throughput may be provided under the constraint of transmission priority on the assumption that interference between WLANs is minimized. It should be noted that, the relay nodes in the D2D communication group may allocate, according to the respective corresponding interference pattern models, transmission timeslots for the terminals in the corresponding group, where the transmission timeslots are from a transmission timeslot set corresponding to a plurality of relay nodes, and the number of timeslots in the transmission timeslot set may be greater than the number of relay nodes, may be less than the number of relay nodes, or may be equal to the number of relay nodes.

Wherein any transmission slot corresponds to one or more terminals. Optionally, any transmission time slot corresponds to a plurality of terminals, and the plurality of terminals respectively correspond to different relay nodes; optionally, any transmission time slot corresponds to a plurality of terminals, and the plurality of terminals correspond to the same relay node; optionally, any transmission time slot corresponds to a terminal, and the terminal corresponds to a relay node; optionally, any one transmission slot corresponds to one terminal, and the terminal corresponds to a plurality of relay nodes.

If the same transmission time slot corresponds to a plurality of terminals, each terminal in the same transmission time slot can be scheduled by the relay node, so as to construct a candidate user group which is transmitted simultaneously in the same transmission time slot.

In an exemplary embodiment, as shown in fig. 5, according to the transmission priority, determining the user group information of the terminal in the relay node corresponding group in the transmission time slot, and determining the transmission power information matched with the user group information, and performing data transmission according to the transmission time slot, the user group information and the transmission power information in the current scheduling period to implement the minimization of interference between WLANs may include steps 510 to 540:

step 510: and distributing each terminal to a matched candidate terminal set corresponding to different gain levels according to channel gain information of the terminal to which a data packet buffer queue in the data transmission buffer zone belongs, wherein the data packet buffer queue comprises at least one of a data packet buffer queue using a Wi-Fi uplink transmission link and a data packet buffer queue using a Wi-Fi downlink transmission link.

In this exemplary embodiment, the terminals to be matched currently are terminals corresponding to transmission slots, and these terminals belong to a plurality of relay nodes. When the uplink transmission link and the downlink transmission link of the data packet buffer queue of the terminal to be matched are currently uplink transmission link and downlink transmission link, the terminal to which the data packet buffer queue in the data transmission buffer area belongs can be stored in the candidate terminal set.

The method comprises the steps that a data transmission buffer area is used for storing data, wherein the data transmission buffer area is used for storing data, and the data transmission buffer area is used for storing data; optionally, the packet buffer queue also includes a packet buffer queue using Wi-Fi downlink transmission link; optionally, the packet buffer queues may further include a packet buffer queue using Wi-Fi uplink and a packet buffer queue using Wi-Fi downlink. The embodiment of the disclosure determines the buffer queue included in the data packet buffer queue according to the actual data transmission application scenario, and the embodiment of the disclosure is not limited in particular.

For example, the terminals in the candidate terminal set may be sorted in order of channel gain values from small to large, and the candidate terminal set may be divided into a plurality of matching candidate terminal sets (such as a weak terminal set H1, a strong terminal set H3, and a normal terminal set H2) according to the channel gain values, and respectively correspond to different gain levels. After obtaining a plurality of matching candidate terminal sets, the matching candidate terminal set to which the terminal to be matched belongs can be determined according to the channel gain information of the current terminal to be matched, namely, each terminal is distributed to the matching candidate terminal sets corresponding to different gain levels according to the channel gain information.

It should be noted that H1, H2, and H3 in the foregoing illustration are merely exemplary, and the embodiments of the disclosure may further divide the candidate terminal set into other number and gain level of matching candidate terminal sets according to actual application scenarios.

Step 520: and determining a target matching terminal from the matching candidate terminal set according to the target matching candidate terminal set to which the current terminal to be matched belongs, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal.

In this exemplary embodiment, according to a target candidate terminal set to which the current terminal to be matched belongs, the target candidate terminal may be determined from the candidate terminal set on the basis of the minimum interference between WLANs, so as to construct a candidate user group according to the current terminal to be matched and the target candidate terminal. It should be noted that, the candidate user group is a set of a plurality of terminals that perform data transmission in the same timeslot, the plurality of terminals belong to different relay nodes, and the candidate user group is constructed to search the user group with the minimum interference between WLANs to perform simultaneous timeslot data transmission, so as to improve the data transmission efficiency of each transmission timeslot.

In some possible embodiments, the terminals to which the packet buffer queues in the data transmission buffer area belong may be allocated to a first set, a second set and a third set corresponding to different gain levels according to the channel gain value, where the gain levels of the first set, the second set and the third set are sequentially increased, and the channel gain value corresponding to the set of the high gain level is greater than the channel gain value corresponding to the set of the low gain level.

Then, the terminals in the first set, the second set and the third set may be respectively ordered according to the order from the small channel gain value to the large channel gain value, so as to respectively obtain a first sequence, a second sequence and a third sequence.

If the current terminal to be matched belongs to the second set, acquiring a first terminal corresponding to the minimum channel gain value in the first sequence, and acquiring a second terminal corresponding to the maximum channel gain value in the third sequence, and constructing a candidate user group according to the current terminal to be matched, the first terminal and the second terminal; if the current terminal to be matched belongs to the first set, acquiring a third terminal corresponding to the maximum channel gain value in the third sequence, and constructing a candidate user group according to the current terminal to be matched and the third terminal; and if the current terminal to be matched belongs to the third set, acquiring a fourth terminal corresponding to the minimum channel gain value in the first sequence, and constructing a candidate user group according to the current terminal to be matched and the fourth terminal.

For example, fig. 6 shows a flowchart for constructing a candidate user group under transmission priority constraints, subject to minimum interference between WLANs, according to an exemplary embodiment of the present disclosure. As shown in fig. 6, the process includes:

Step S610: and in the WLAN link, storing all terminals belonging to a data packet buffer queue using a Wi-Fi uplink transmission link and/or a Wi-Fi downlink transmission link in a data transmission buffer area in a candidate terminal set.

Step S620: and arranging the terminals in the candidate terminal set according to the sequence from the small channel gain value to the large channel gain value.

Step S630: the terminals in the arrangement obtained in step S520 are allocated to the sets of matching candidate terminals H1, H2 and H3 corresponding to different gain levels according to the magnitude of the channel gain value.

Wherein, H1 is a gain weak terminal set, H2 is a gain normal terminal set, and H3 is a gain strong terminal set.

Step S640: and firstly judging whether the current terminal to be matched belongs to H2 or not by taking the minimum interference among WLAN as a criterion.

Step S650: if the current terminal to be matched belongs to H2, the current terminal to be matched, the terminal with the minimum channel gain value in H1 and the terminal with the maximum channel gain value in H3 are constructed into a candidate user group.

Step S660: and judging whether the current terminal to be matched belongs to H1.

Step S670: if the current terminal to be matched belongs to H1, constructing the current terminal to be matched and the terminal with the maximum channel gain value in H3 into a candidate user group.

Step S680: and if the current terminal to be matched does not belong to H1, forming a candidate user group by the current terminal to be matched and the terminal with the minimum channel gain value in H1.

According to the method and the device for transmitting the data, under the constraint of the transmission priority, the user group with the minimum interference among the WLANs is matched under the constraint of the transmission priority by taking the minimum interference among the WLANs as a criterion, so that the interference among the WLANs in the process of simultaneous slot transmission is minimum, and the data transmission efficiency of the D2D communication group is improved.

Step 530: and under the constraint of the transmission priority, determining the transmission power coefficient of the terminal in the candidate user group in the transmission time slot by taking the minimum interference degree among the WLAN as a criterion.

In this exemplary embodiment, after the candidate user group is constructed, the transmission power coefficient of each terminal in the transmission time slot needs to be adjusted, which is shown in fig. 6, and after the candidate user group is constructed, step S690 may be further included, where the power distribution coefficient of each terminal in the candidate user group may be determined based on the transmission priority, so that each terminal obtains the power distribution coefficient matched with the transmission time slot.

Under the constraint of transmission priority, the power allocation mode with the maximum throughput of the constraint of the priority is obtained by taking the minimum interference among the WLAN as a criterion, so that the minimum interference among the scheduled WLAN systems of each terminal and the maximum transmission time slot and power allocation coefficient of the throughput are sought, and the transmission efficiency of the whole D2D communication group is improved.

Step 540: and receiving and transmitting data to be transmitted of the terminals in the corresponding group in the current scheduling period based on the transmission power coefficient.

In this exemplary embodiment, after determining the candidate user group, the transmission time slot of each terminal in the candidate user group, and the power allocation coefficient of each terminal that matches the transmission time slot, the relay node may transmit and receive the data packet to be transmitted of each terminal in the current scheduling period.

In some possible embodiments, according to the interference graph model, if it is determined that transmission interference exists between terminals in the candidate user group, the candidate user group members may be adjusted based on the minimum interference degree between WLANs. With continued reference to fig. 2, if the relay node UE3 schedules the UE5, and when the relay node UE4 schedules the UE6, it is determined that there is transmission interference in the transmission process, the relay node UE3 schedules the UE10 to schedule the UE6 with the relay node UE4 for performing a time slot transmission under the constraint of the transmission priority and with the minimum interference priority among WLANs as a criterion.

In some possible embodiments, if it is determined that there is transmission interference between terminals in the candidate user group according to the interference pattern model, the transmission power between terminals in the candidate user group in the current scheduling period may be adjusted based on the minimum interference degree between WLANs. With continued reference to fig. 2, if the relay node UE3 schedules the UE5 and the relay node UE4 schedules the UE6, it is determined that there is transmission interference in the transmission process, at least one of the transmit-receive powers of the UE3 and the UE4 may be adjusted under the constraint of the transmission priority and with the minimum interference degree between WLANs as a criterion.

In some possible embodiments, when the target terminal in the candidate user group accesses to the plurality of relay nodes at the same time, according to the interference pattern model, if it is determined that transmission interference exists between the target terminal in the candidate user group and each terminal, the transmission policy of the transmission link between the target terminal having the interference and the target relay node is adjusted based on the criterion of minimizing the interference degree between WLANs. The method for adjusting the transmission link is not particularly limited, and the adjustment method can be selected according to the actual transmission scene so as to achieve minimum interference among WLANs.

When receiving and transmitting data to be transmitted of terminals in a corresponding group in a current scheduling period based on a transmission power coefficient, members in a candidate user group can be adjusted based on minimum interference among WLAN under the constraint of transmission priority, or the receiving and transmitting power of relay nodes in the candidate user group can be adjusted, so that the interference among the scheduled WLAN systems of each terminal is minimum and the throughput is maximum.

In an exemplary embodiment, since the data packets to be transmitted in the D2D communication group reach randomly, the embodiment of the present disclosure further provides an implementation manner for the relay node to perform optimized transmission on the data packets to be transmitted in the candidate user group under the constraint of minimum interference priority and transmission power between WLANs, which may include step S710 and step S720:

Step S710: and determining the data packet priority of the data packet to be sent according to the characteristics of the data packet to be transmitted and the channel state information aiming at each terminal in the corresponding group of the relay node.

In this exemplary implementation, the characteristics of the data packet to be transmitted include, but are not limited to, queue status information, service type, etc. of a data packet buffer queue where the data packet to be transmitted is provided by the MAC layer of the media access control layer.

Step S720: and under the constraint of the transmission priority, determining the transmission power of the data packet to be transmitted according to the data packet priority by taking the minimum interference degree among the WLANs as a criterion.

In this exemplary embodiment, the transmission power of the data packet to be transmitted may also be determined according to the data packet priority under the constraint of the transmission priority, with the minimum interference degree between WLANs as a criterion.

As can be seen from the foregoing, the data transmission method in the exemplary embodiment of the present disclosure, after the relay terminal or terminal already in the D2D communication group accesses the D2D communication group, establishes the D2D communication group with the terminal to be accessed to the D2D communication group through autonomous decision according to the current link transmission condition information of the relay terminal or terminal, so as to provide relay services with high signal to interference plus noise ratio SINR, high receiving power, low load and low historical outage probability for the neighboring terminal user preference. After the D2D communication group is established, the relay node distributes transmission time slots for the terminals according to the interference condition information among the WLANs of the terminals in the corresponding group, and aims to minimize the interference degree among the WLANs of service users in the current scheduling period. And then according to the characteristics of the terminal nodes and the data transmission characteristics, determining transmission power information matched with the terminals in the relay node corresponding group in the allocated transmission time slots by taking the minimum interference degree between WLAN as a criterion, and realizing the transmission scheduling of receiving and transmitting data. According to the embodiment of the disclosure, based on the knowledge of the interference condition among the WLAN, the optimal transmission time and transmission power distribution with minimum interference among the WLAN systems and maximum throughput when each terminal is scheduled by the relay node are searched, so that the transmission efficiency of Wi-Fi D2D service is improved, and the service experience is improved.

In addition, in an exemplary embodiment of the present disclosure, a data transmission apparatus is further provided, which is applied to a relay node in a device-to-device D2D communication group, where the relay node constructs the D2D communication group with a terminal in a corresponding group via autonomous decision based on its current link transmission condition information. Referring to fig. 8, the data transmission apparatus 800 may include a transmission slot scheduling module 810 and a data transmission scheduling module 820. In particular, the method comprises the steps of,

a transmission time slot scheduling module 810, configured to allocate a transmission time slot to the terminal in the relay node corresponding group according to interference condition information between WLANs of the terminal in the relay node corresponding group;

a data transmission scheduling module 820, configured to determine, based on terminal node characteristics and data transmission characteristics of the terminals in the relay node corresponding group, transmission power information of each of the terminals that matches the transmission time slot, so as to perform data transmission according to the transmission time slot and the transmission power information in a current scheduling period

In an exemplary embodiment of the present disclosure, the transmission slot scheduling module 810 may include:

a first model construction unit, configured to construct an interference graph model according to interference condition information between wireless local area networks WLANs of terminals in the relay node corresponding group;

And the time slot allocation unit is used for allocating transmission time slots for the terminals in the relay node corresponding group based on the interference diagram model and by taking the minimum interference degree among the WLAN as a criterion.

In an exemplary embodiment of the present disclosure, the data transmission scheduling module 820 may include:

the second model construction unit is used for constructing a terminal priority measurement model according to the terminal node characteristics and the data transmission characteristics;

a transmission priority determining unit, configured to determine a transmission priority of a terminal in the relay node corresponding group based on the terminal priority measurement model;

and the transmission scheduling unit is used for determining the user group information of the terminal in the relay node corresponding group in the transmission time slot according to the transmission priority, determining the transmission power information matched with the user group information, and carrying out data transmission according to the transmission time slot, the user group information and the transmission power information in the current scheduling period so as to realize the minimum interference degree among the WLAN.

In an exemplary embodiment of the present disclosure, when any one of the transmission slots corresponds to one or more terminals, the transmission scheduling unit includes:

a terminal allocation unit, configured to allocate each terminal to a set of matching candidate terminals corresponding to different gain levels according to channel gain information of a terminal to which a packet buffer queue in a data transmission buffer area belongs, where the packet buffer queue includes at least one of a packet buffer queue using a Wi-Fi uplink transmission link and a packet buffer queue using a Wi-Fi downlink transmission link;

The user group matching unit is used for determining a target matching terminal from a target matching candidate terminal set according to the target matching candidate terminal set to which the current terminal to be matched belongs, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal, wherein the current terminal to be matched is a terminal corresponding to the transmission time slot;

the power scheduling unit is used for determining the transmission power coefficient of the terminal in the candidate user group in the transmission time slot according to the transmission priority and by taking the minimum interference among WLAN as a criterion; and receiving and transmitting data to be transmitted of the terminals in the corresponding group in the current scheduling period based on the transmission power coefficient.

In an exemplary embodiment of the present disclosure, the transmission scheduling unit is configured to: the method comprises the steps that terminals of a data packet buffer queue in a data transmission buffer area are distributed to a first set, a second set and a third set corresponding to different gain levels according to the size of channel gain values, the gain levels of the first set, the second set and the third set are sequentially increased, and the channel gain value corresponding to a set of a high gain level is larger than the channel gain value corresponding to a set of a low gain level;

The transmission scheduling unit may further include:

the ordering unit is used for ordering the terminals in the first set, the second set and the third set according to the sequence from the small channel gain value to the large channel gain value respectively to obtain a first sequence, a second sequence and a third sequence;

the first matching unit is configured to, if the current terminal to be matched belongs to the second set, obtain a first terminal corresponding to a minimum channel gain value in the first sequence, and obtain a second terminal corresponding to a maximum channel gain value in the third sequence, and construct the candidate user group according to the current terminal to be matched, the first terminal and the second terminal;

the second matching unit is configured to obtain a third terminal corresponding to a maximum channel gain value in the third sequence if the current terminal to be matched belongs to the first set, and construct the candidate user group according to the current terminal to be matched and the third terminal;

and a third matching unit, configured to obtain a fourth terminal corresponding to a minimum channel gain value in the first sequence if the current terminal to be matched belongs to the third set, and construct the candidate user group according to the current terminal to be matched and the fourth terminal.

In an exemplary embodiment of the present disclosure, the transmission scheduling unit further includes:

the user group adjusting unit is used for adjusting the candidate user group members by taking the minimum interference degree among WLAN as a criterion if judging that transmission interference exists among all terminals in the candidate user group according to the interference graph model; or alternatively

The power adjustment unit is used for adjusting the transmission power among the terminals in the candidate user group in the current scheduling period by taking the minimum interference degree among WLAN as a criterion if judging that the transmission interference exists among the terminals in the candidate user group according to the interference graph model; or alternatively

And the transmission link adjustment unit is used for adjusting the transmission strategy of the transmission link between the target terminal with interference and the target relay node by taking the minimum interference degree between WLAN as a criterion if the transmission interference exists between the target terminal and each terminal in the candidate user group according to the interference graph model when the target terminal in the candidate user group is simultaneously accessed to a plurality of relay nodes.

In an exemplary embodiment of the present disclosure, the data transmission apparatus 800 further includes:

the data packet priority determining module is used for determining the data packet priority of the data packet to be sent according to the characteristics of the data packet to be transmitted and the channel state information for each terminal in the corresponding group of the relay node; and the transmission power determining module is used for determining the transmission power of the data packet to be transmitted according to the data packet priority by taking the minimum interference degree among the WLANs as a criterion under the constraint of the transmission priority.

the data transmission apparatus 800 may further include:

the service quality information acquisition module is used for determining service quality information matched with the service level of the relay node according to the current link transmission condition information by the relay node;

and the request processing module is used for determining the current request processing state according to the service quality information, and initiating an access flow with the terminal to be accessed by combining the current request processing state and the service quality information to construct the D2D communication group.

In an exemplary embodiment of the present disclosure, the request processing module may include:

the request processing unit is used for receiving the access request information sent by the terminal to be accessed, and if the service quality information meets a preset threshold condition, the request processing unit feeds back access request response information to the terminal to be accessed so that the terminal to be accessed determines the accessed relay node according to the service quality information of the relay node corresponding to the received request response information;

And the terminal access unit is used for initiating an access flow with the terminal to be accessed so as to construct the D2D communication group.

Since specific details of each functional module (unit) in the data transmission device according to the exemplary embodiment of the present disclosure have been described in detail in the above-described embodiment of the data transmission method, a detailed description thereof will be omitted.

It should be noted that although in the above detailed description several modules or units of the data transmission device are mentioned, this division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.

Furthermore, in exemplary embodiments of the present disclosure, a computer storage medium capable of implementing the above-described method is also provided. On which a program product is stored which enables the implementation of the method described above in the present specification. In some possible embodiments, the various aspects of the present disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to carry out the steps according to the various exemplary embodiments of the disclosure as described in the "exemplary methods" section of this specification, when the program product is run on the terminal device.

Referring to fig. 9, a program product 900 for implementing the above-described method according to an exemplary embodiment of the present disclosure is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present disclosure is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The computer readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., connected via the Internet using an Internet service provider).

In addition, in an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided. Those skilled in the art will appreciate that the various aspects of the present disclosure may be implemented as a system, method, or program product. Accordingly, various aspects of the disclosure may be embodied in the following forms, namely: an entirely hardware embodiment, an entirely software embodiment (including firmware, micro-code, etc.) or an embodiment combining hardware and software aspects may be referred to herein as a "circuit," module "or" system.

An electronic device 1000 according to such an embodiment of the present disclosure is described below with reference to fig. 10. The electronic device 1000 shown in fig. 10 is merely an example and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.

As shown in fig. 10, the electronic device 1000 is embodied in the form of a general purpose computing device. Components of electronic device 1000 may include, but are not limited to: the at least one processing unit 1010, the at least one memory unit 1020, a bus 1030 connecting the various system components (including the memory unit 1020 and the processing unit 1010), and a display unit 1040.

Wherein the storage unit stores program code that is executable by the processing unit 1010 such that the processing unit 1010 performs steps according to various exemplary embodiments of the present disclosure described in the above-described "exemplary methods" section of the present specification.

The memory unit 1020 may include readable media in the form of volatile memory units such as Random Access Memory (RAM) 1021 and/or cache memory unit 1022, and may further include Read Only Memory (ROM) 1023.

Storage unit 1020 may also include a program/utility 1024 having a set (at least one) of program modules 1025, such program modules 1025 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.

Bus 1030 may be representing one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

The electronic device 1000 can also communicate with one or more external devices 1100 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1000, and/or with any device (e.g., router, modem, etc.) that enables the electronic device 1000 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1050. Also, electronic device 1000 can communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet, through network adapter 1060. As shown, the network adapter 1060 communicates with other modules of the electronic device 1000 over the bus 1030. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with the electronic device 1000, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.

From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a terminal device, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.

Furthermore, the above-described figures are only schematic illustrations of processes included in the method according to the exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily appreciated that the processes shown in the above figures do not indicate or limit the temporal order of these processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, for example, among a plurality of modules.

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

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

Claims

1. A data transmission method, applied to a relay node in a device-to-device D2D communication group, where the relay node is configured to establish the D2D communication group with a terminal in a corresponding group via autonomous decision based on its current link transmission condition information, the method comprising:

and determining transmission power information matched with the transmission time slot of each terminal based on the terminal node characteristics and the data transmission characteristics of the terminals in the corresponding group of the relay node, so as to perform data transmission according to the transmission time slot and the transmission power information in the current scheduling period.

2. The method according to claim 1, wherein the allocating a transmission time slot for the relay node corresponding intra-group terminal according to the interference condition information between the wireless local area networks WLANs of the relay node corresponding intra-group terminal comprises:

3. The method according to claim 2, wherein the determining, based on the terminal node characteristics and the data transmission characteristics of the terminals in the relay node corresponding group, the transmission power information of each of the terminals matching the transmission time slot, so as to perform data transmission according to the transmission time slot and the transmission power information in the current scheduling period, includes:

and according to the transmission priority, determining the user group information of the terminal in the relay node corresponding group in the transmission time slot, and determining the transmission power information matched with the user group information, so as to perform data transmission according to the transmission time slot, the user group information and the transmission power information in the current scheduling period, thereby realizing the minimum interference degree among the WLAN.

4. The method of claim 3, wherein when any one of the transmission slots corresponds to one or more terminals, determining user group information of the terminal in the relay node corresponding group in the transmission slot according to the transmission priority, and determining transmission power information matched with the user group information, so as to perform data transmission according to the transmission slot, the user group information and the transmission power information in a current scheduling period, so as to realize minimum interference among WLANs, and the method comprises:

5. The method of claim 4, wherein terminals to which the packet buffer queues in the data transmission buffer area belong are allocated to a first set, a second set and a third set corresponding to different gain levels according to channel gain values, and gain levels of the first set, the second set and the third set are sequentially increased, wherein channel gain values corresponding to a set of a high gain level are greater than channel gain values corresponding to a set of a low gain level;

if the current terminal to be matched belongs to the first set, acquiring a third terminal corresponding to the maximum channel gain value in the third sequence, and constructing the candidate user group according to the current terminal to be matched and the third terminal;

and if the current terminal to be matched belongs to the third set, acquiring a fourth terminal corresponding to the minimum channel gain value in the first sequence, and constructing the candidate user group according to the current terminal to be matched and the fourth terminal.

6. The method of claim 4, wherein the determining a target matching terminal from the set of matching candidate terminals according to the set of target matching candidate terminals to which the current terminal to be matched belongs, and constructing a candidate user group according to the current terminal to be matched and the target matching terminal, further comprises:

7. A method according to claim 3, characterized in that the method further comprises:

8. The method according to any of claims 1 to 7, wherein the relay node is a relay terminal or an access terminal of a relay terminal within the D2D communication group, the access terminal of the relay terminal accessing a corresponding relay terminal in a Client role;

9. The method of claim 8, wherein the determining the current request processing state according to the quality of service information and initiating an access procedure with the terminal to be accessed in combination with the current request processing state and the quality of service information to construct the D2D communication group comprises:

Initiating an access procedure with the terminal to be accessed to establish the D2D communication group;

10. A data transmission apparatus for a relay node in a device-to-device, D2D, communication group, the relay node configured to autonomously decide with a terminal in a corresponding group based on its current link transmission status information, the apparatus comprising:

a transmission time slot scheduling module, configured to allocate a transmission time slot to the terminal in the relay node corresponding group according to interference condition information between WLANs of the terminal in the relay node corresponding group;

and the data transmission scheduling module is used for determining the transmission power information matched with the transmission time slot of each terminal based on the terminal node characteristics and the data transmission characteristics of the terminals in the relay node corresponding group so as to perform data transmission according to the transmission time slot and the transmission power information in the current scheduling period.