CN117119552A

CN117119552A - Data transmission method and device, storage medium and electronic equipment

Info

Publication number: CN117119552A
Application number: CN202210524907.2A
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: 2022-05-13
Filing date: 2022-05-13
Publication date: 2023-11-24

Abstract

The present disclosure relates to the technical field of mobile communications, and relates to a data transmission method and apparatus, a storage medium, and an electronic device, including: the gateway node receives a weighted interference information submatrix reported by a relay node in the D2D communication group, wherein the weighted interference information submatrix is constructed by the relay node according to the reporting information of the associated access terminal and the interference condition information between a wireless local area network system and a cellular system which the relay node receives; constructing a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes; constructing a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the weighted interference information matrix; and determining a channel allocation scheme based on the target weighted interference information matrix so as to schedule the access terminal corresponding to the relay node and/or the gateway node in the current scheduling period, and scheduling the associated access terminal by the relay node in the scheduling range of the gateway node.

Description

Data transmission method and device, storage medium and electronic equipment

Technical Field

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

Background

Mobile communication is a modern technology for wireless communication, as one of important achievements of development of computers and mobile internet, the development of mobile communication technology through the technologies of the first generation, the second generation, the third generation and the fourth generation has advanced into the era of the development of the fifth generation technology. The D2D (Device-to-Device) communication technology, which is one of the key candidate technologies for 5G (5 th Generation Mobile Communication Technology, fifth generation mobile communication technology), is a significant advantage in 5G mobile communication applications based on the characteristics of ultra-high rate, ultra-large bandwidth, ultra-large access capability, ultra-large data processing capability, and the like, which depend on the mobile communication technology.

In the related technology, under the high-frequency networking, the cost of realizing wide coverage of the network is obviously increased, the power consumption of the terminal in a weak signal area is high, the data transmission rate is low, the terminal experience is seriously affected, an operator has entered the era of high investment and low return by building a base station to increase the capacity expansion mode of the network coverage, and the terminal in the D2D communication group is distributed in a high density through the transmission mode of the D2D communication technology, so that the same-frequency interference effect, the adjacent-frequency interference effect, the intermodulation interference and the like are easy to occur, the problem of retransmitting the data after collision occurs, the transmission power consumption is increased, and the transmission efficiency is reduced.

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 in 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 one aspect of the present disclosure, there is provided a data transmission method, the method comprising:

the gateway node receives a weighted interference information submatrix reported by a relay node in a device-to-device (D2D) communication group, wherein the weighted interference information submatrix is constructed by the relay node according to the reporting information of an associated access terminal and the interference condition information between a wireless local area network system and a cellular system which the relay node receives; the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes; the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the gateway node; the gateway node determines a channel allocation scheme based on the target weighted interference information matrix so as to carry out transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, wherein the access terminal accesses the gateway node in a Client role, and the relay node carries out transmission scheduling on the associated access terminal according to the weighted interference information submatrix in a scheduling range of the gateway node; the channel allocation scheme at least comprises a transmission channel, and a transmission bandwidth and a transmission power matched with the transmission channel.

In an exemplary embodiment of the present disclosure, the relay node constructs the weighted interference information submatrix according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system to which the relay node is subjected, including:

determining first target information according to the multidimensional report information, wherein the report information is information indicating the data transmission requirement of the corresponding associated access terminal and comprises at least one of position information, flow information and link state information;

determining a first weight of each associated access terminal based on the interference degree of the interference condition information of the relay node to the associated access terminal;

determining second target information according to the first target information and the first weight corresponding to the associated access terminal;

and constructing the weighted interference information submatrix according to the second target information of all the associated access terminals of the relay node, wherein matrix elements of the weighted interference information submatrix are in one-to-one correspondence with the associated access terminals.

In an exemplary embodiment of the disclosure, the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes, including:

For any relay node, carrying out weighted fusion on the second target information in the weighted interference information submatrix to obtain third target information;

and constructing the weighted interference information matrix according to the third target information of all the relay nodes.

In an exemplary embodiment of the present disclosure, the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between the wireless local area network system and the cellular system, which the gateway node receives, including:

determining a second weight of each relay node based on the interference degree of the interference condition information of the gateway node to the relay node and the hop count of the relay node;

and constructing a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and the second weight.

In an exemplary embodiment of the present disclosure, the gateway node determines a channel allocation scheme based on the target weighted interference information matrix to perform transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, including:

the network node transmits the channel allocation scheme to the relay node so that the relay node transmits wireless local area network data according to the channel allocation scheme in the current scheduling period; and/or

The network node issues the channel allocation scheme to the access terminal, so that the access terminal transmits wireless local area network data according to the channel allocation scheme in the current scheduling period.

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

and the relay nodes in the D2D communication group adjust the channel allocation scheme according to the real-time evaluation transmission efficiency so as to change the transmission time slot allocated to the associated access terminal.

In an exemplary embodiment of the present disclosure, a data packet to be transmitted enters a first buffer queue of the gateway node;

the gateway node determines a channel allocation scheme based on the target weighted interference information matrix, so as to perform transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, and the method comprises the following steps:

in the downlink transmission process from the gateway node to the relay node, determining a first transmission time slot of each relay node and/or a second transmission time slot of the access terminal according to the channel allocation scheme;

the gateway node obtains the characteristics of the terminal node corresponding to the data packet to be transmitted and the characteristics of the transmission data, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data;

And based on the service quality level of the transmission link of the first buffer queue, according to the transmission priority, allocating the first transmission time slot and/or the second transmission time slot to different data packets to be transmitted in the first buffer queue for transmission in the current scheduling period, wherein each first transmission time slot and/or each second transmission time slot has a corresponding interference-free transmission link.

In an exemplary embodiment of the disclosure, a data packet to be transmitted enters a second buffer queue of the relay node, the associated access terminal is an access terminal of other relay nodes and/or relay nodes accessing the relay node, and the access terminal of the relay node accesses the relay node in a Client role;

the relay node performs transmission scheduling on the associated access terminal in a current scheduling period within a scheduling range of the gateway node, and the method comprises the following steps:

in the downlink transmission process from the relay node to the associated access terminal, determining a third transmission time slot of the other relay nodes and/or a fourth transmission time slot of the access terminal of the relay node according to the channel allocation scheme;

The relay node obtains the characteristics of the terminal node corresponding to the data packet to be transmitted and the characteristics of the transmission data, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data;

and based on the service quality level of the transmission link of the second buffer queue, allocating the third transmission time slot and/or the fourth transmission time slot to different data packets to be transmitted in the second buffer queue and transmitting the data packets according to the transmission priority in the current scheduling period, wherein each third transmission time slot and/or each fourth transmission time slot has a corresponding interference-free transmission link.

In an exemplary embodiment of the present disclosure, a data packet to be transmitted is in a third buffer queue of an access terminal corresponding to the relay node and/or the gateway node;

in the uplink transmission process from the relay node and/or the access terminal corresponding to the gateway node, the gateway node receives a request to send frame RTS of the relay node and/or the access terminal corresponding to the gateway node, and returns a request response frame ARF, where the request response frame ARF is used to notify the relay node and/or the access terminal corresponding to the gateway node of corresponding working channel information;

The gateway node sends channel resource competition information down to other terminal nodes so as to inform the other terminal nodes to compete for channel resources corresponding to the working channel information;

the gateway node obtains the characteristics of the terminal node corresponding to the data packet to be transmitted and the characteristics of the data packet to be transmitted, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the data packet to be transmitted;

and responding to the trigger of the data transmission condition, broadcasting a clear-to-send frame CTS to the relay node and/or the access terminal corresponding to the gateway node so as to inform the relay node and/or the access terminal corresponding to the gateway node to start transmitting the data in the third buffer queue according to the transmission priority.

In one exemplary embodiment of the present disclosure, the data packets to be transmitted are in a fourth buffer queue of the associated access terminal;

in the uplink transmission process from the associated access terminal to the relay node, the relay node receives a request-to-send frame RTS of the associated access terminal based on the channel allocation scheme and returns a request response frame ARF, wherein the request response frame ARF is used for notifying the corresponding working channel information of the associated access terminal;

The relay node sends channel resource competition information to other terminal nodes to inform the other terminal nodes to compete for channel resources corresponding to the working channel information;

the relay node acquires the corresponding terminal node characteristics and transmission data characteristics of the data packet to be transmitted, and determines the transmission priority of the data packet to be transmitted according to the terminal node characteristics and the transmission data characteristics;

responsive to a trigger of a data transmission condition, broadcasting a clear-to-send frame CTS to the associated access terminal to inform the associated access terminal to start transmitting data in the fourth buffer queue according to the transmission priority;

the associated access terminal is an access terminal of other relay nodes and/or relay nodes accessing the relay node, and the access terminal of the relay node accesses the relay node in a Client role.

According to one aspect of the present disclosure, there is provided a data transmission apparatus, the apparatus comprising:

the matrix construction module is used for receiving a weighted interference information submatrix reported by a relay node in the equipment-to-equipment (D2D) communication group by a gateway node, wherein the weighted interference information submatrix is constructed by the relay node according to the reporting information of an associated access terminal and the interference condition information between a wireless local area network system and a cellular system which the relay node receives; the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes; the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the gateway node;

The transmission scheduling module is used for determining a channel allocation scheme by the gateway node based on the target weighted interference information matrix so as to carry out transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, wherein the access terminal accesses the gateway node in a Client role, and the relay node carries out transmission scheduling on the associated access terminal according to the weighted interference information submatrix in a scheduling range of the gateway node;

the channel allocation scheme at least comprises a transmission channel, and a transmission bandwidth and a transmission power matched with the transmission channel.

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, by constructing the D2D communication group and taking the gateway node with WLAN communication capability and cellular communication capability in the D2D communication group as a relay, the data transmission task of the terminal node in the D2D communication group is unloaded to the gateway node to be relayed to the cellular system, so that the terminal node in the D2D communication group obtains the access authorization of the cellular system, the data transmission rate of the D2D communication group in a weak signal area is improved, and the terminal power consumption is reduced. The method comprises the steps that a relay node firstly builds a weighted interference information submatrix in a self group according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system, which are received by the relay node, and reports the weighted interference information submatrix to a gateway node, the gateway node builds the weighted interference information matrix between the relay nodes according to the weighted interference information submatrix of each relay node, namely, the weighted interference information matrix is equivalent to packet management, then the gateway node builds a target weighted interference information matrix of the whole D2D communication group according to the interference condition information between the wireless local area network system and the cellular system, which are received by the relay node, and the received weighted interference information submatrix, so that channel allocation is accurate to each terminal node based on group management, therefore, the gateway node schedules access terminals corresponding to the relay node and/or the gateway node after determining a channel allocation scheme based on the target weighted interference information matrix, and the relay node schedules the associated access terminals in a scheduling range of the gateway node, so as to obtain a transmission scheme with matched working channels, transmission power and transmission bandwidth, the target weighted interference information matrix is built by the gateway node, the target weighted interference information matrix when the wireless local area network system and the cellular system is scheduled, the wireless local area network system and the wireless local area network system is scheduled, the maximum throughput is achieved, and the service efficiency is improved, and the wireless local area network efficiency 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 relay node constructing a weighted interference information submatrix according to an exemplary embodiment of the present disclosure;

fig. 4 is a flowchart illustrating a gateway node determining a channel allocation scheme based on a target weighted interference information matrix for downlink transmission scheduling to a relay node and/or an access terminal corresponding to the gateway node in a current scheduling period according to an exemplary embodiment of the present disclosure;

fig. 5 is a flowchart illustrating a gateway node determining a channel allocation scheme based on a target weighted interference information matrix to schedule uplink transmission procedures of a relay node and/or an access terminal corresponding to the gateway node in a current scheduling period according to an exemplary embodiment of the present disclosure;

Fig. 6 is a flowchart illustrating uplink transmission scheduling of an associated access terminal by a relay node within a scheduling range of a gateway node in a current scheduling period according to an exemplary embodiment of the present disclosure;

fig. 7 shows a schematic diagram of a method of building Wi-Fi D2D communication groups according to an example embodiment of the present disclosure;

fig. 8 is a schematic system structure diagram corresponding to a data transmission method in an application scenario according to an exemplary embodiment of the present disclosure;

fig. 9 illustrates an architecture diagram of a data transmission apparatus according to an exemplary embodiment of the present disclosure;

FIG. 10 illustrates a schematic diagram of a storage medium according to an exemplary embodiment of the present disclosure; and

fig. 11 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 can send and receive 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 ), the implementation method is to avoid data transmission collision among stations, that is, before data transmission, whether a transmission channel is Busy (Busy) is detected, if the transmission channel Busy is transmitted, a sender can retransmit in random waiting time, and the cellular network is interacted with a terminal in real time by a base station. When terminals in the Wi-Fi D2D communication group are distributed in a high density, common-frequency interference caused by WLAN data transmission among the terminals is easy to cause, meanwhile, as a sink node of cellular data, interference between a WLAN system and the cellular system is likely to exist, so that the problem that data to be transmitted in the Wi-Fi D2D communication group are retransmitted after collision occurs, the data transmission efficiency of the Wi-Fi D2D communication group is greatly reduced, and the power consumption of the terminals is increased.

Based on this, in an exemplary embodiment of the present disclosure, a data transmission method is provided first. Referring to fig. 1, the data transmission method includes the steps of:

Step S110: the gateway node receives a weighted interference information submatrix reported by a relay node in the equipment D2D communication group, wherein the weighted interference information submatrix is constructed by the relay node according to the reporting information of the associated access terminal and the interference condition information between a wireless local area network system and a cellular system which the relay node receives;

step S120: the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes;

step S130: the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the gateway node;

step S140: the gateway node determines a channel allocation scheme based on the target weighted interference information matrix so as to carry out transmission scheduling on the relay node and/or the access terminal corresponding to the gateway node in the current scheduling period, wherein the relay node carries out transmission scheduling on the associated access terminal according to the weighted interference information submatrix in the scheduling range of the gateway node.

The gateway nodes with WLAN communication capability and cellular communication capability are obtained through service discovery and information acquisition based on Wi-Fi D2D protocol, a D2D communication group is built through an autonomous decision mode of each terminal node, the gateway nodes with WLAN communication capability and cellular communication capability in the D2D communication group are used as relays, the data transmission tasks of the terminal nodes in the D2D communication group are unloaded to the gateway nodes to be relayed to a cellular system, the terminal nodes in the D2D communication group obtain the access authorization of the cellular system, the terminal data transmission requirements in the areas without cellular signal coverage or weak cellular signals are met, the data transmission rate and the data transmission quality of the D2D communication group are improved, and the terminal power consumption is reduced.

The method comprises the steps that a relay node firstly builds a weighted interference information submatrix in a self group according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system, and reports the weighted interference information submatrix to a gateway node, the gateway node builds the weighted interference information matrix between each relay node according to the weighted interference information submatrix of each relay node, namely, the weighted interference information matrix is equivalent to packet management, then the gateway node builds a target weighted interference information matrix of the whole D2D communication group according to the interference condition information between the self wireless local area network system and the cellular system and the weighted interference information matrix, so that channel allocation based on the group management is realized, the gateway node determines a channel allocation scheme based on the target weighted interference information matrix, then schedules access terminals corresponding to the relay node and/or the gateway node, and the relay node can schedule the associated access terminal in a scheduling range of the gateway node, so as to obtain a transmission scheme with a working channel matched with transmission power and transmission bandwidth, the target of minimum interference and maximum throughput between the wireless local area network system and the cellular system when each terminal node in the communication group is scheduled is realized through dynamic scheduling, and the wireless local area network system and WLAN data transmission efficiency is improved.

The data transmission method in the exemplary embodiment of the disclosure is applied to a gateway node in a device-to-device (D2D) communication group, the gateway node performs WLAN data transmission with a terminal node in the D2D communication group through a Wireless Local Area Network (WLAN) communication module, the gateway node is accessed to a cellular system through a cellular communication module, and the gateway node relays a data transmission task of the terminal node to the cellular system through the cellular communication module. As shown in fig. 2, an architecture diagram of a D2D communication group according to an exemplary embodiment of the present disclosure is shown in fig. 2, where the D2D communication group includes UE1 (User Equipment) to UE11, and the UE1 includes a WLAN communication module and a cellular communication module, that is, UE1 has a capability of transmitting both WLAN data and cellular data, so that UE1 is a gateway node according to an embodiment of the present disclosure, WLAN data of other UEs may be offloaded to UE1 and relayed to a cellular system by UE1, so that other UEs (terminal nodes) obtain access authorization of the cellular system.

It should be noted that, before the D2D communication group is established, the UE2 to UE11 only have WLAN data transmission capability, and after the UE2 to UE11 is a member of the D2D communication group, the gateway node UE1 is used as a relay, and the UE2 to UE11 offload a data transmission task to the UE1 and relay to the cellular system, so that the UE2 to UE11 also have the capability of transmitting cellular data. Although UE2, UE3, UE4, UE5 and UE10 are also relay nodes, in the embodiments of the present disclosure, the gateway node is dedicated to UE1 having both the capability to transmit WLAN data and the capability to transmit cellular data.

It should be noted that, in the embodiment of the present disclosure, the gateway node may schedule the relay node in the D2D communication group and the access terminal corresponding to the gateway node, that is, the gateway node may also schedule the terminal node connected with the gateway node, and is not the relay node; accordingly, the associated access terminal of the relay node schedule may include other relay nodes connected to the relay node, and may also include access terminals of other relay nodes connected to the relay node.

The data transmission method in the exemplary embodiment of the present disclosure will be further described with reference to fig. 1.

In step S110, the gateway node receives a weighted interference information sub-matrix reported by a relay node in the device-to-device D2D communication group, where the weighted interference information sub-matrix is constructed by the relay node according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system to which the relay node is subjected.

In an exemplary embodiment of the present disclosure, with the goal of maximizing WLAN data throughput in a Wi-Fi D2D multi-hop communication group, which is determined based on QoS (Quality of Service ), and minimizing interference between WLAN and cellular systems, a target weighted interference information matrix of the D2D communication group is constructed, and based on the target weighted interference information matrix, a gateway node is enabled to dynamically know, in real time, relevant information that affects transmission scheduling, such as interference condition information, channel state information (e.g., channel load, number of hops reaching the gateway node, etc.), traffic information, and the like of each relay node and/or access terminal of the gateway node in the D2D communication group, and the embodiments of the present disclosure include, but are not limited to, information that the target weighted interference information matrix can be used to reflect.

The relay node firstly constructs a weighted interference information sub-matrix according to the reporting information of the associated access terminal and the interference condition information between the wireless local area network system and the cellular system which the relay node receives. The relay node in the D2D communication group needs to concurrently process and transmit WLAN data when receiving and transmitting WLAN data in the D2D communication group and when performing cellular data receiving and transmitting with the cellular system. The relay node has harmonic interference of an interference site, new air interface NR signals when receiving Wi-Fi signals and intermodulation interference of interference site signals, and the interference site refers to a base station or other relay nodes overlapped with the coverage area of the relay node.

The associated access terminal may include other relay nodes connected to the relay node, and/or an access terminal connected to the relay node, where the associated access terminal listens to Beacon frames of other terminal nodes, determines from which terminal the received Beacon frame comes according to information carried by the Beacon frame, and reports the Beacon frame to the associated relay node, where the reported information includes, but is not limited to, multiple dimensional information such as traffic flow information, location information, and link condition information (e.g., channel load information, hop count information to the relay node, etc.) of the associated access terminal.

As fig. 3 illustrates a flowchart of a relay node constructing a weighted interference information submatrix according to an embodiment of the present disclosure, steps S310 to S340 may be included:

step S310, determining first target information according to multidimensional report information, wherein the report information is information indicating data transmission requirements of corresponding associated access terminals.

In this exemplary embodiment, for any associated access terminal of the relay node, weighted fusion is performed according to the multidimensional report information, so as to determine the first target information. According to the report information of each dimension and the corresponding weight, one piece of target information, namely the first target information, can be extracted from the report information of the multiple dimensions. For example, the reported information of the associated access terminal includes three dimensions of terminal location information, traffic flow information and channel load information, namely information a, information b and information c, and the corresponding weights are α1, β1 and γ1, respectively, so that the first target information can be obtained by fusing each dimension information with the corresponding weight information, where the weight can be determined according to the transmission effect evaluated in real time, multidimensional information of each associated access terminal, and the like.

Step S320, determining a first weight of each associated access terminal based on the interference degree of the interference condition information of the relay node to the associated access terminal.

In the present exemplary embodiment, the first weight of each associated access terminal is determined in combination with the interference degree of the interference condition information suffered by the relay node itself to the associated access terminal.

Step S330, determining second target information according to the first target information and the first weight corresponding to the associated access terminal.

In the present exemplary embodiment, the first target information corresponding to each associated access terminal is multiplied by the corresponding first weight, respectively, as one second target information, that is, one second target information corresponds to one associated access terminal.

Step S340, constructing a weighted interference information sub-matrix according to the second target information of all the associated access terminals of the relay node, wherein matrix elements of the weighted interference information sub-matrix are in one-to-one correspondence with the associated access terminals.

In this exemplary embodiment, the second target information is used as a matrix element of the weighted interference information submatrix of the relay node, so that the weighted interference information matrix of the relay node is constructed according to the second target information corresponding to all associated access terminals of the relay node, and finally the relay node reports the corresponding weighted interference information submatrix to the gateway node.

Through the exemplary embodiment of the disclosure, the relay node combines the reporting information of the associated access terminal and the interference condition information received by the relay node, constructs the weighted interference information submatrix in the own group, and can manage the transmission scheduling of each terminal node in the corresponding group based on the weighted interference information submatrix.

In step S120, the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes.

In this exemplary embodiment, for any relay node, the second target information in the weighted interference information submatrices is subjected to weighted fusion, so as to obtain a third target information, that is, a third target information corresponds to one relay node, and then the weighted interference information matrix is constructed according to the third target information of all relay nodes. Wherein the weight may be determined according to the transmission effect evaluated in real time, multi-dimensional information of each relay node, and the like.

For example, the second target information of a certain relay node includes second target information 1 corresponding to an associated access terminal a, second target information 2 corresponding to an associated access terminal B, and second target information 3 corresponding to an associated access terminal C, the weights corresponding to the second target information are α2, β2, and γ2, respectively, and first, one third target information corresponding to the relay node is obtained according to the third target information and the corresponding weights. Then, according to the third target information of all the relay nodes, constructing a weighted interference information matrix, if the third target information 1 corresponding to the relay node A is m, the third target information 2 corresponding to the relay node B is n, and the third target information 3 corresponding to the relay node C is l, constructing the weighted interference information matrix as [ m, n, l ].

Through the exemplary embodiment of the disclosure, the gateway node constructs a weighted interference information matrix among all relay nodes in the Wi-Fi D2D communication group according to the weighted interference information submatrices reported by the relay nodes, namely, the group management is realized.

In step S130, the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between the wireless local area network system and the cellular system.

In this exemplary embodiment, the gateway node is also interfered between the WLAN system and the cellular system, so the gateway node needs to acquire the interference information between the WLAN system and the cellular system, which is the gateway node, that is, not only the weighted interference information submatrix reported by other relay nodes, but also the interference information received by the gateway node itself needs to be acquired. Based on this, the gateway node can construct a complete target weighted interference information matrix conforming to the D2D communication group.

First, determining a second weight of each relay node based on the interference degree of the interference condition information of the gateway node to the relay node and the hop count of the relay node. When other terminal nodes in the D2D communication group have cellular data requirements, offloading a data transmission task to a gateway node, after the gateway node receives the data transmission task through a WLAN communication module, relaying the data transmission task to a cellular network through the cellular communication module by the gateway node, returning corresponding cellular data to the gateway node through the cellular network, receiving the returned data through the cellular communication module by the gateway node, and forwarding the cellular data to other terminal nodes in the D2D communication group through the WLAN communication module. In the data transmission process, when the relay node processes and transmits WLAN data and cellular data, the situation of preempting transmission channel resources exists when the same frequency resources are shared, and the situation of retransmitting and retransmitting after data collision is easy to occur, so that transmission interference between a WLAN system and a cellular system is generated.

The gateway node has harmonic interference of an interference site, first intermodulation interference of Wi-Fi interference signals and interference site signals when receiving NR signals, and second intermodulation interference of the NR signals and the interference site signals when receiving the Wi-Fi signals. According to the embodiment of the disclosure, the second weight of each relay node is determined according to the interference degree of the interference condition information received by the gateway node to the relay node and the hop count from the relay node to the gateway node, and then a target weighted interference information matrix of the D2D communication group is constructed according to the weighted interference information matrix and the second weight. For example, after determining the second weight of each relay node, multiplying the second weight by the corresponding third target information in the weighted interference information matrix, where the multiplication result is used as a matrix element in the target weighted interference information matrix, so as to obtain the target weighted interference information matrix of the whole D2D communication group.

According to the exemplary embodiment of the disclosure, after the gateway node constructs the target weighted interference information matrix, the gateway node performs scheduling management on the terminal nodes of each group based on the packet management condition, so that the gateway node optimizes a channel allocation scheme based on the target weighted interference information matrix, and the gateway node can dynamically acquire relevant information influencing transmission scheduling such as interference conditions, link state information, position information and the like of each terminal node in the D2D communication group in real time, thereby transmitting WLAN data of each relay node and/or access terminal corresponding to the gateway node in a data transmission process (i.e. in a scheduling period) based on the target weighted interference information matrix, and providing high SINR (Signal to Interference plus Noise Ratio ), high receiving power and low-load link transmission for the relay terminal and/or the access terminal corresponding to the gateway node under the conditions of network topology stability and transmission power constraint.

In step S140, the gateway node determines a channel allocation scheme based on the target weighted interference information matrix, so as to perform transmission scheduling on the relay node and/or the access terminal corresponding to the gateway node in the current scheduling period, where the access terminal accesses the gateway node in a Client role, and the relay node performs transmission scheduling on the associated access terminal according to the weighted interference information submatrix in the scheduling range of the gateway node.

In an exemplary embodiment of the present disclosure, an access terminal corresponding to a gateway node accesses in a Client role, which means that the access terminal does not continue to connect with other terminals, and the channel allocation scheme at least includes a transmission channel, and a transmission bandwidth and a transmission power matched with the transmission channel. The gateway node determines a channel allocation scheme based on the target weighted interference information matrix, and aims to obtain a channel allocation scheme with the minimum interference between the WLAN system and the cellular system corresponding to the terminal node and the channel matching with the power.

The gateway node transmits the channel allocation scheme to the relay node so that the relay node transmits the wireless local area network data according to the channel allocation scheme in the current scheduling period; and/or the gateway node issues a channel allocation scheme to the access terminal so that the access terminal transmits the wireless local area network data according to the channel allocation scheme in the current scheduling period.

In some possible embodiments, the relay node may optimize the transmit-receive link selection weight according to the channel allocation scheme in combination with the real-time estimation of the channel transmission efficiency, provide the associated access terminal with a link with high SINR, high receiving power and low load under the conditions of network topology stability and power constraint, and transmit WLAN data of each associated access terminal in the group in the scheduling period, that is, the relay node in the D2D communication group adjusts the channel allocation scheme according to the real-time estimation of the transmission efficiency, so as to change the transmission time slot allocated to the associated access terminal. Because the channel allocation scheme obtained by the gateway node may have inaccurate conditions, the channel allocation scheme is dynamically adjusted by the relay node according to the channel transmission efficiency estimated in real time, so that the scheduling accuracy of WLAN data transmission is improved, and the scheduling pressure of the gateway node can be reduced by re-optimizing the relay node, so that the transmission scheme with high SINR, high receiving power and low load link is provided for the terminal in the communication group under the constraint of network topology stability and working power, and the efficient transmission of the WLAN data of each terminal node in the communication group is realized in a scheduling period (namely in the data transmission process).

In an exemplary embodiment, data to be transmitted, typically transmitted in a Wi-Fi D2D network, first arrives at a buffer of a relay node, including one or more buffer queues. Based on this, the embodiment of the disclosure provides an implementation manner that a gateway node determines a channel allocation scheme based on a target weighted interference information matrix to perform downlink transmission scheduling on a relay node and/or an access terminal corresponding to the gateway node in a current scheduling period. Wherein, the data packet to be transmitted enters the first buffer queue of the gateway node, the downlink scheduling process may include steps S410 to S430:

in step S410, in the downlink transmission process from the gateway node to the relay node, the first transmission time slot of each relay node and/or the second transmission time slot of the access terminal are determined according to the channel allocation scheme.

In the present exemplary embodiment, first, a first transmission time slot is allocated to each relay node and/or a second transmission time slot is allocated to an access terminal according to a channel allocation scheme, wherein the transmission time slots have at least a transmission power and a transmission bandwidth that are correspondingly matched.

Step S420, the gateway node obtains the characteristics of the terminal node and the characteristics of the transmission data corresponding to the data packet to be transmitted, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data.

In this exemplary embodiment, after the data packet to be transmitted enters the first buffer queue, the gateway node obtains the characteristics of the terminal node and the transmission data characteristics corresponding to the data packet to be transmitted, for example, the gateway node may identify the load type of the data packet to be transmitted, determine the QoS requirement level of the data packet to be transmitted, obtain the physical layer channel state information of the node to which the data packet to be transmitted belongs and one or more of the state information of the queue of the medium access control layer, the traffic flow, the location information and the link load or the hop count information to the gateway node, and determine the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the transmission data characteristics.

After obtaining the terminal node characteristics and the transmission data characteristics, a user dynamic priority evaluation model based on each dimension characteristic can be constructed to determine the transmission priority of the data packet based on the user dynamic priority evaluation model.

In some possible embodiments, the user dynamic priority evaluation model may be constructed for each dimension feature and corresponding weight information, and the weight information may be dynamically adjusted according to the current channel transmission efficiency evaluation result, so that the determined transmission priority is also a dynamic adjustment process, so as to achieve the goal of minimum interference and maximum throughput between the scheduled WLAN system and the cellular system of each terminal node in the group.

Step S430, based on the quality of service level of the transmission link of the first buffer queue, the first transmission time slot and/or the second transmission time slot are allocated to different data packets to be transmitted in the first buffer queue and transmitted according to the transmission priority in the current scheduling period, wherein each first transmission time slot and/or each second transmission time slot has a corresponding interference-free transmission link.

In this exemplary embodiment, after evaluating the downlink QoS aware level of the current buffer queue, the gateway node transmits the data packets to be transmitted of the current buffer queue according to the transmission priority, i.e. allocates the first transmission time slot and/or the second transmission time slot to different data packets to be transmitted in the first buffer queue and transmits the data packets according to the transmission priority in the current scheduling period. Wherein each first transmission time slot and/or each second transmission time slot has a corresponding interference-free transmission link.

Specifically, a downlink transmission link from the gateway node to the relay node and/or an access terminal corresponding to the gateway node adopts a polling mode, the gateway node searches channel loads of the relay node and/or the access terminal corresponding to the gateway node, periodically operates and updates channel allocation, adjusts transmission bandwidth, transmission power and the like, orders the links in descending order according to the link loads and the hop count of the links reaching the gateway node, and divides all the links into M interference-free link sets. Correspondingly, the transmission time of each data frame of the data packet to be transmitted is also divided into M time slots, and each time slot corresponds to each group of non-interference links, and each time slot only schedules links in the non-interference link set, wherein M is a positive integer.

By the method and the device, the downlink transmission links from the gateway node to the relay node and/or the access terminals corresponding to the gateway node can be scheduled, the channel allocation scheme is optimized, and the goals of minimum interference and maximum throughput between the scheduled WLAN and the cellular system of each terminal node are achieved.

In an exemplary embodiment, the relay node performs transmission scheduling on the associated access terminal in the current scheduling period within the scheduling range of the gateway node, and may include:

firstly, in the downlink transmission process from a relay node to an associated access terminal, determining a third transmission time slot of other relay nodes and/or a fourth transmission time slot of the access terminal of the relay node according to a channel allocation scheme; secondly, the relay node acquires the characteristics of the terminal node corresponding to the data packet to be transmitted and the characteristics of the transmission data, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data; and finally, based on the service quality level of the transmission link of the second buffer queue, distributing third transmission time slots and/or fourth transmission time slots to different data packets to be transmitted in the second buffer queue according to the transmission priority in the current scheduling period, and transmitting, wherein each third transmission time slot and/or each fourth transmission time slot has a corresponding interference-free transmission link.

Specifically, the downlink transmission link from the relay node to the associated access terminal adopts a polling mode, the relay node searches the channel load of the associated access terminal, periodically operates and updates channel allocation and adjusts transmission bandwidth, transmission power and the like, orders the links according to the link load and the hop count of the link reaching the relay node, divides all the links into N (N is less than or equal to M) interference-free link sets, correspondingly, the transmission time of each data frame of the data packet to be transmitted is divided into N time slots, and corresponds to each group of interference-free links respectively, and each time slot only schedules the links in the interference-free link sets.

By the method and the device, the downlink transmission link from the relay node to the associated access terminal can be scheduled, a channel allocation scheme is optimized, and the aims of minimum interference and maximum throughput between the scheduled WLAN and the cellular system of each terminal node are achieved.

In an exemplary embodiment, when the data packet to be transmitted is in the third buffer queue of the access terminal corresponding to the relay node and/or the gateway node, the gateway node may further determine, based on the target weighted interference information matrix, a channel allocation scheme to schedule an uplink transmission procedure of the access terminal corresponding to the relay node and/or the gateway node in the current scheduling period. Steps S510 to S540 may be included:

Step S510, in the uplink transmission process from the access terminal corresponding to the relay node and/or the gateway node to the gateway node, the gateway node receives a request-to-send frame RTS of the access terminal corresponding to the relay node and/or the gateway node, and returns a request response frame ARF for notifying the relay node and/or the access terminal corresponding to the gateway node of the corresponding working channel information;

step S520, the gateway node sends channel resource competition information down to other terminal nodes to inform the other terminal nodes of channel resources corresponding to the competition working channel information;

step S530, the gateway node obtains the characteristics of the terminal node and the characteristics of the transmission data corresponding to the data packet to be transmitted, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data;

step S540, in response to the triggering of the data transmission condition, broadcasts a clear-to-send frame CTS to the relay node and/or the access terminal corresponding to the gateway node, so as to notify the relay node and/or the access terminal corresponding to the gateway node to start transmitting the data in the third buffer queue according to the transmission priority.

Specifically, the gateway node dynamically adjusts the transmission power of each relay node and/or the access terminal corresponding to the gateway node through collection, storage, calculation and decision, dynamically adjusts the transmission bandwidth, the channel use duration, the transmission power and the like of the relay node and/or the access terminal corresponding to the gateway node under different interference conditions in real time, the access terminal corresponding to the relay node and/or the gateway node acquires Channel State Information (CSI) through RTS (Request To Send) frames, and if the gateway node receives an RTS frame sent by the relay node and/or the access terminal corresponding to the gateway node in the group, the gateway node responds to ARF (Ask for Request) frames to inform the relay node and/or the access terminal corresponding to the gateway node of the distributed working channel information, and issues channel resource contention information to other terminal nodes to inform other terminal nodes of the channel resources corresponding to the competing working channel information. When the number of requests of the relay node and/or the access terminal corresponding to the gateway node received by the gateway node reaches a number threshold, or the waiting time accords with a time threshold, the gateway node broadcasts a CTS (Clear to Send) frame for the relay node and/or the access terminal corresponding to the gateway node, and notifies the relay node and/or the access terminal corresponding to the gateway node to start transmitting data in the third buffer queue.

It should be noted that, before notifying the relay node and/or the access terminal corresponding to the gateway node to start transmitting the data in the third buffer queue, the gateway node may further obtain a terminal node characteristic and a transmission data characteristic corresponding to the data packet to be transmitted, and determine, according to the terminal node characteristic and the transmission data characteristic, a transmission priority of the data packet to be transmitted, so as to notify the relay node and/or the access terminal corresponding to the gateway node to start transmitting the data in the third buffer queue according to the transmission priority.

The terminal node characteristics and the transmission data characteristics include one or more of traffic flow, location information and link load or hop count information to the gateway node, and all factors affecting transmission scheduling belong to the terminal node characteristics and the transmission data characteristics of the embodiments of the present disclosure in the current scheduling period.

According to the embodiment, the gateway node can realize scheduling of uplink transmission processes of the relay node and/or the access terminal corresponding to the gateway node in the current scheduling period, and provides link transmission with high SINR, high receiving power and low load for the relay node and/or the access terminal corresponding to the gateway node under the conditions of network topology stability and power constraint, so that the aim of minimum interference and maximum throughput between the scheduled WLAN and the cellular system of each terminal node is achieved.

In an exemplary embodiment of the present disclosure, when the data packet to be transmitted is in the fourth buffer of the associated access terminal, the relay node may perform uplink transmission scheduling on the associated access terminal in the current scheduling period within the scheduling range of the gateway node, and may include steps S610 to S640:

step S610, in the uplink transmission process from the associated access terminal to the relay node, the relay node receives a request to send frame RTS of the associated access terminal based on a channel allocation scheme, and returns a request response frame ARF for notifying the corresponding working channel information of the associated access terminal;

step S620, the relay node sends channel resource competition information down to other terminal nodes to inform the other terminal nodes to compete for channel resources corresponding to the working channel information;

step S630, the relay node obtains the characteristics of the terminal node and the characteristics of the transmission data corresponding to the data packet to be transmitted, and determines the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the transmission data;

step S640, in response to the triggering of the data transmission condition, broadcasting a clear-to-send frame CTS to the associated access terminal to notify the associated access terminal to start transmitting the data in the fourth buffer queue according to the transmission priority;

The associated access terminal is an access terminal of other relay nodes and/or relay nodes accessing the relay node, and the access terminal corresponding to the relay node is accessed in a Client role, which means that the access terminal is not connected with other terminals continuously.

Specifically, the relay node dynamically adjusts the transmission power of other relay nodes and/or access terminals in the group through collection, storage, calculation and decision, dynamically adjusts the transmission bandwidth, the channel use duration, the transmission power and the like of other relay nodes and/or access terminals in different interference conditions in real time, obtains Channel State Information (CSI) through RTS (Request To Send) frames, and responds to ARF (Ask for Request) frames if the relay node receives RTS frames sent by other relay nodes and/or access terminals in the group, so as to inform the other relay nodes and/or access terminals of the distributed working channel information, and issues channel resource contention information to other terminal nodes so as to inform the other terminal nodes of the channel resources corresponding to the competing working channel information. And if the number of the requests of other relay nodes and/or access terminals received by the relay node reaches a number threshold or the waiting time accords with a time threshold, the relay node broadcasts a CTS (Clear to Send) frame for the other relay nodes and/or access terminals, and informs the other relay nodes and/or access terminals to start transmitting the data in the fourth buffer queue.

It should be noted that, before notifying other relay nodes and/or access terminals to start transmitting the data in the fourth buffer queue, the relay nodes may further acquire the characteristics of the terminal node corresponding to the data packet to be transmitted and the characteristics of the data packet to be transmitted, and determine the transmission priority of the data packet to be transmitted according to the characteristics of the terminal node and the characteristics of the data packet to be transmitted, so as to notify other relay nodes and/or access terminals to start transmitting the data in the fourth buffer queue according to the transmission priority.

According to the embodiment, the relay node can schedule the uplink transmission process of other relay nodes and/or access terminals in the current scheduling period, and provides high SINR, high receiving power and low-load link transmission for other relay nodes and/or access terminals under the conditions of network topology stability and power constraint, so that the aims of minimum interference and maximum throughput between the scheduled WLAN and the cellular system of each terminal node are achieved.

In an exemplary embodiment of the present disclosure, a method of building Wi-Fi D2D communication groups is also provided. As shown in fig. 7, the terminal of the embodiment example of the present disclosure constructs a Wi-Fi D2D communication group through service discovery, information acquisition, and autonomous roles.

After the UE1 starts the D2D client, if it has cellular capability, it is set as a "gateway node", and meanwhile, a D2D communication Group is created in a GO1 (Group Owner) role, where the terminal node starts device discovery and service discovery broadcasting, including but not limited to, information such as a user name, SSID (Service Set Identifier ), password, VPN (Virtual Private Network, virtual private network) service address, hop count, cellular signal strength, electric quantity, connection count, time delay, and the like, and the terminal node a sets its hop count to 1.

The UE3 starts a D2D Client, if the UE3 does not have the cellular capability, the UE3 is set as a relay node, equipment discovery and service discovery broadcasting is started, all target relay nodes and other relay nodes are searched, an optimal node is selected according to an Offloading decision algorithm, the optimal node is accessed to the optimal node (UE 1) through SSID and password in a Client role (LC role), and the hop count of the UE is +1 on the basis of the hop count of the optimal node. For example, the determined optimal node has a hop count of 1, and if the optimal node having a hop count of 1 is accessed, the hop count of the current node is 2. The terminal node in the GO role is switched to the AP mode (Wireless Access Point, wireless access point mode), and the terminal node in the Client role is connected to the AP in the GO role.

Further, UE3 also creates a D2D communication group with GO identity, initiates service discovery and broadcasting, including but not limited to, information of user name, SSID, password, VPN service address, hop count, cellular signal strength, power, connection count, time delay, etc., corresponding to more terminal nodes, such as UE5, and connected according to the above rule, UE2 accessing UE1 also creates a D2D communication group with GO identity, initiates service discovery and broadcasting, more terminal nodes, such as UE4, and connected according to the above rule, corresponding to UE4 also creates a D2D communication group with GO identity, and connected according to the above rule, UE6 and UE7 activate D2D clients, and access to UE4, and so on, forming a tree-like multi-hop network topology, such as fig. 7.

After service discovery, information acquisition and autonomous decision among terminals (UEs), the data transmission task is offloaded to a neighboring gateway node (such as UE 1) to relay to the cellular network by using WiFi D2D.

It should be noted that the manner of constructing the D2D communication group shown in fig. 7 is merely exemplary, and the embodiment of the disclosure may also select a corresponding networking manner according to an actual data transmission scenario, which is not limited in particular.

The data transmission method of the embodiment of the present disclosure is described in detail below in connection with an application scenario.

Fig. 8 shows a system structure diagram corresponding to a data transmission method in an application scenario, as shown in fig. 8, a terminal node a, a terminal node B and a terminal node C form a Wi-Fi D2D communication group based on a service discovery module, a device connection module and a networking decision module (Offloading module), where the data transmission module of the terminal node C includes a WLAN communication module and a cellular communication module at the same time, so that local cellular data transmission can be implemented, and WLAN data transmission of Wi-Fi D2D can be implemented, so that the terminal node C is used as a gateway node in the embodiment of the present disclosure, the terminal node a can directly connect through Wi-Fi D2D, send WLAN data to the terminal node C, and the terminal node B can forward WLAN data to a cellular system via the terminal node a and the terminal node C, and correspondingly, response data returned by the cellular system is directly sent to the terminal node a or the terminal node B via the terminal node C through Wi-Fi D2D.

The terminal node C is used as a gateway node, when receiving cellular data and concurrently processing WLAN data transmission, interference between the WLAN data and the cellular data transmission is easy to occur, so that retransmission and retransmission after collision are caused, especially for a complex regional wireless environment, a large number of users with similar user application preference are gathered, so that the demand of a hot network flow is suddenly and rapidly increased, cellular wireless link resources are insufficient, service quality (Quality of Service) cannot be guaranteed, the Wi-Fi D2D communication group in the embodiment of the present disclosure is used as a relay of other terminal nodes in the communication group without increasing the cost of terminal hardware, a transmission interference effect between a WLAN system and the cellular system is obtained through the gateway node, and a target weighted interference information sub-matrix of each relay terminal is received, a channel allocation scheme is determined based on the target weighted interference information matrix, so that wireless local area network data transmission in the D2D communication group is scheduled by using the channel allocation scheme, and the minimum interference between the scheduled WLAN and the cellular system, the maximum throughput and the target data utilization rate of the data are improved.

As can be seen from the foregoing, in the data transmission method in the exemplary embodiment of the present disclosure, by constructing a D2D communication group, and taking a gateway node having WLAN communication capability and cellular communication capability in the D2D communication group as a relay, offloading a data transmission task of a terminal node in the D2D communication group to the gateway node to relay to a cellular system, so that the terminal node in the D2D communication group obtains access authorization of the cellular system, improving a data transmission rate of the D2D communication group in a weak signal area, and reducing terminal power consumption. The method comprises the steps that a relay node firstly builds a weighted interference information submatrix in a self group according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system, and reports the weighted interference information submatrix to a gateway node, the gateway node builds the weighted interference information matrix between the relay nodes according to the weighted interference information submatrix of each relay node, namely, the weighted interference information matrix is equivalent to packet management, then the gateway node builds a target weighted interference information matrix of the whole D2D communication group according to the interference condition information between the self wireless local area network system and the cellular system and the received weighted interference information matrix, so that channel allocation based on the group management is accurate to each terminal node, therefore, the gateway node determines a channel allocation scheme based on the target weighted interference information matrix, then schedules access terminals corresponding to the relay node and/or the gateway node, and can schedule the associated access terminals in a scheduling range of the gateway node, so as to obtain a transmission scheme with matched working channels, transmission power and transmission bandwidth, the target of minimum interference and maximum throughput between the wireless local area network system and the cellular system when each terminal node in the communication group is scheduled is achieved through dynamic scheduling, and the service efficiency of the wireless local area network is improved.

Referring to fig. 9, the data transmission apparatus 900 may include a matrix construction module 910 and a transmission scheduling module 920. In particular, the method comprises the steps of,

a matrix construction module 910, configured to receive, by a gateway node, a weighted interference information sub-matrix reported by a relay node in a device-to-device D2D communication group, where the weighted interference information sub-matrix is constructed by the relay node according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system to which the relay node is subjected; the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes; the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the gateway node;

a transmission scheduling module 920, configured to determine, by the gateway node, a channel allocation scheme based on the target weighted interference information matrix, so as to perform transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, where the access terminal accesses the gateway node in a Client role, and the relay node performs transmission scheduling on the associated access terminal according to the weighted interference information submatrix in a scheduling range of the gateway node;

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. 10, a program product 1000 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 1100 according to such an embodiment of the present disclosure is described below with reference to fig. 11. The electronic device 1100 shown in fig. 11 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. 11, the electronic device 1100 is embodied in the form of a general purpose computing device. Components of electronic device 1100 may include, but are not limited to: the at least one processing unit 1110, the at least one memory unit 1120, a bus 1130 connecting the different system components (including the memory unit 1120 and the processing unit 1110), and a display unit 1140.

Wherein the storage unit stores program code that is executable by the processing unit 1110 such that the processing unit 1110 performs steps according to various exemplary embodiments of the present disclosure described in the above-described "exemplary methods" section of the present specification.

The storage unit 1120 may include a readable medium in the form of a volatile storage unit, such as a Random Access Memory (RAM) 1121 and/or a cache memory 1122, and may further include a Read Only Memory (ROM) 1123.

Storage unit 1120 may also include a program/utility 1124 having a set (at least one) of program modules 1125, such program modules 1125 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.

The bus 1130 may be a local bus 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 bus using any of a variety of bus architectures.

The electronic device 1100 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 1100, and/or any devices (e.g., routers, modems, etc.) that enable the electronic device 1100 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 1150. Also, electronic device 1100 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 1160. As shown, network adapter 1160 communicates with other modules of electronic device 1100 via bus 1130. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 1100, 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.

Claims

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

the gateway node receives a weighted interference information submatrix reported by a relay node in a device-to-device (D2D) communication group, wherein the weighted interference information submatrix is constructed by the relay node according to the reporting information of an associated access terminal and the interference condition information between a wireless local area network system and a cellular system which the relay node receives;

the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes;

the gateway node constructs a target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference condition information between a wireless local area network system and a cellular system which are received by the gateway node;

the gateway node determines a channel allocation scheme based on the target weighted interference information matrix so as to carry out transmission scheduling on the relay node and/or an access terminal corresponding to the gateway node in a current scheduling period, wherein the access terminal accesses the gateway node in a Client role, and the relay node carries out transmission scheduling on the associated access terminal according to the weighted interference information submatrix in a scheduling range of the gateway node;

2. The method of claim 1, wherein the relay node constructs the weighted interference information submatrix according to reporting information of an associated access terminal and interference condition information between a wireless local area network system and a cellular system to which the relay node is subject, comprising:

3. The method of claim 1, wherein the gateway node constructs a weighted interference information matrix based on the weighted interference information submatrices of the relay nodes, comprising:

4. A method according to claim 3, wherein the gateway node constructs the target weighted interference information matrix of the D2D communication group according to the weighted interference information matrix and interference information between the wireless local area network system and the cellular system to which the gateway node is subject, and the method comprises:

5. The method according to claim 1, wherein the gateway node determining a channel allocation scheme based on the target weighted interference information matrix to schedule transmission to the relay node and/or the access terminal to which the gateway node corresponds in a current scheduling period, comprises:

6. The method of claim 5, wherein the method further comprises:

7. A method according to any one of claims 1 to 6, wherein data packets to be transmitted enter a first buffer queue of the gateway node;

8. The method according to any of claims 1 to 6, wherein the data packets to be transmitted enter a second buffer queue of the relay node, the associated access terminal is an access terminal of another relay node accessing the relay node and/or the relay node, the access terminal of the relay node accesses the relay node in a Client role;

9. The method according to any of claims 1 to 6, wherein the data packets to be transmitted are in a third buffer queue of the access terminal to which the relay node and/or the gateway node corresponds;

10. The method according to any of claims 1 to 6, wherein the data packets to be transmitted are in a fourth buffer queue of the associated access terminal;

The associated access terminal is other relay nodes accessing the relay node and/or the access terminal of the relay node, and the access terminal of the relay node accesses the relay node in a Client role.