CN104754618B

CN104754618B - Wireless data transmission method and device

Info

Publication number: CN104754618B
Application number: CN201310751803.6A
Authority: CN
Inventors: 魏宇欣; 覃忠宾; 郭欣; 孙晨
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2019-12-06
Anticipated expiration: 2033-12-31
Also published as: CN104754618A

Abstract

The invention discloses a wireless data transmission method and a wireless data transmission device. The wireless data transmission method comprises the following steps: and sending a data information acquisition request so as to determine a target node from which to acquire the data required by the local node according to the response of at least one other node to the data information acquisition request. The data information acquisition request comprises data information of the local node, and the data information acquisition request comprises information indicating the following contents: the topic and type of data required by the local node, and the data with the topic and type stored in the local node.

Description

wireless data transmission method and device

Technical Field

The present invention relates generally to the field of wireless communications, and more particularly, to a method and apparatus for wireless data transmission.

Background

With the development of mobile communication technology and the increasing popularization of mobile devices, various mobile applications are coming out of range, and the demand for high-speed and reliable data transmission is increasing. Unfortunately, the transmission capabilities of mobile terminals appear to always be inadequate for the user's expectations. In the case of limited transmission bandwidth and transmission delay, how to guarantee the service quality of the user is a difficult problem faced by all communication technologies.

Disclosure of Invention

the following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

In view of the above problems in the prior art, some embodiments of the present invention provide a wireless data transmission apparatus and method, which can discover overlapping data existing in a network before data transmission and perform data processing in advance, thereby reducing latency of a user during data transmission and saving available bandwidth of the network.

According to an aspect of the present invention, there is provided a wireless data transmission method, including: and sending a data information acquisition request so as to determine a target node from which to acquire the data required by the local node according to the response of at least one other node to the data information acquisition request. Wherein, the data information acquisition request contains data information of the local node, including information indicating the following: the topic and type of data required by the local node, and the data with the topic and type stored in the local node.

According to another aspect of the present invention, there is also provided a wireless data transmission method, including: receiving a data information acquisition request from a request node; acquiring the data information of the request node from the data information acquisition request, wherein the data information comprises information indicating the following contents: the theme and the type of the data required by the requesting node and the data with the theme and the type stored in the requesting node; and sending a response to the data information acquisition request to the request node according to the data information of the request node, so that the request node determines a target node from which the data required by the request node is acquired according to the response.

according to another aspect of the present invention, there is also provided a wireless data transmission apparatus, including: and the data information acquisition unit is used for sending a data information acquisition request so as to determine a target node from which the data required by the local node is acquired according to the response of at least one other node to the data information acquisition request. Wherein, the data information acquisition request contains data information of the local node, including information indicating the following: the topic and type of data required by the local node, and the data with the topic and type stored in the local node.

According to another aspect of the present invention, there is also provided a wireless data transmission apparatus, including: the data information feedback unit is used for receiving a data information acquisition request from a request node and sending a response to the data information acquisition request to the request node according to the data information of the request node contained in the data information acquisition request, so that the request node determines a target node from which data required by the request node is acquired according to the response; and an information extraction unit configured to acquire, from the data information acquisition request, data information of the requesting node, including information indicating: the subject and type of data required by the requesting node, and the data having the subject and type already stored in the requesting node.

in addition, the present disclosure also provides a computer program for implementing any of the above methods.

Furthermore, the present disclosure also provides a computer program product in the form of at least a computer readable medium having computer program code recorded thereon for implementing any of the methods described above.

Drawings

The invention may be better understood by referring to the following description in conjunction with the accompanying drawings, in which like reference numerals are used throughout the figures to indicate like or similar parts. The accompanying drawings, which are incorporated in and form a part of this specification, illustrate preferred embodiments of the present invention and, together with the detailed description, serve to further explain the principles and advantages of the invention. In the drawings:

Fig. 1 shows a schematic flow diagram of a method of wireless data transmission according to an embodiment of the invention;

Fig. 2 shows a further schematic flow chart of a method of wireless data transmission according to an embodiment of the invention;

Fig. 3 shows a further schematic flow chart of a method of wireless data transmission according to an embodiment of the invention;

FIG. 4 shows a schematic flow diagram of an example of a method of maintaining an active neighbor list;

Fig. 5 shows a schematic flow diagram of a method of wireless data transmission according to another embodiment of the invention;

fig. 6 shows a schematic flow diagram of a method of wireless data transmission according to an embodiment of the invention;

Fig. 7 shows a schematic flow diagram of a method of wireless data transmission according to another embodiment of the invention;

Fig. 8 shows a schematic block diagram of a wireless data transmission device according to an embodiment of the invention;

Fig. 9 shows a further schematic block diagram of a wireless data transmission apparatus according to an embodiment of the present invention;

Fig. 10 shows a further schematic block diagram of a wireless data transmission apparatus according to an embodiment of the present invention;

Fig. 11 shows a further schematic block diagram of a wireless data transmission apparatus according to an embodiment of the present invention;

Fig. 12 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention;

Fig. 13 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention;

fig. 14 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention; and

fig. 15 illustrates an exemplary block diagram of a structure of a computer in which embodiments/examples of the present invention may be implemented.

Detailed Description

embodiments of the present invention will be described below with reference to the accompanying drawings. Elements and features depicted in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that the figures and description omit representation and description of components and processes that are not relevant to the present invention and that are known to those of ordinary skill in the art for the sake of clarity.

In response to the above-mentioned problems in the prior art, most of the current solutions are directed to increasing the data transmission rate or increasing the transmission bandwidth. However, the inventor of the present application has noticed that there is a large amount of overlapping information in a real network, and if it is possible to find these overlapping data in advance and perform data processing in advance before data transmission, so that only the missing part of the user is transmitted through the network, it is possible to not only reduce the waiting time delay of the user in data transmission, but also save the available bandwidth of the network. Meanwhile, due to the mobile network oriented, the network topology change caused by the mobility of the user should also be taken into consideration as the data preprocessing. In the surrounding of the mobile user, it is likely that the nearby users already store the information required by the user, and at this time, if the information can be found and the transmission of the information is realized, the user does not need to connect to a remote server to acquire the information, so that the transmission delay can be further reduced.

For this reason, the inventors of the present application have conceived of:

(1) How to realize the discovery of the overlapping information and the signaling interaction process thereof;

(2) How to make a subsequent data transmission strategy after finding the overlapping information; and

(3) How to utilize the network topology information to realize data preprocessing and data transmission so as to further improve the data transmission efficiency.

Some embodiments of the present invention provide a wireless data transmission method and a wireless data transmission apparatus, which can discover overlapping data existing in a network before data transmission and perform data processing in advance, thereby reducing a waiting time delay of a user during data transmission and saving an available bandwidth of the network.

fig. 1 shows a schematic flow diagram of a method of wireless data transmission according to an embodiment of the invention. In this embodiment, the local node wishes to obtain the required data from the other nodes. In the wireless data transmission method P100, in step S110, the local node transmits a data information acquisition request, so as to determine a target node from which to acquire data required by the local node, according to a response of at least one other node to the data information acquisition request. The data information acquisition request comprises data information of the local node. The data information of the local node includes information indicating: the topic and type of data required by the local node, and the data with the topic and type stored in the local node.

here and below, by way of example and not limitation, the subject of the data may be the subject of the content represented by the data. The topic may be for a specific event, for example a certain real-time news story or a certain kind of specific information, such as traffic information. The theme can also be a fuzzy concept, for example, when a public safety event occurs, the user may not know what specific event occurs, but may initiate a data information acquisition request for similar content with a relatively fuzzy theme such as "public safety"; after receiving the request, the related node may initiate a content-based search for the locally stored data, and feed back information of all data related to the topic to the requesting node. The type of data is for example voice, video, text etc. Accordingly, the information indicating the type of data may be data format information, such as txt, JPEG, wmv, mp3, and the like.

The information indicating the data stored in the local node may include source information of the stored data, such as a web address, or source website information + an ID number of the data content. For example, where the stored data content is a segment of a movie, a longer duration movie may be segmented by the source web site into a number of small segments, each segment being assigned an ID.

The type of data required by the local node and the type of data already stored in the local node may be of one type or multiple types, both of which are not necessarily linked.

In the above embodiment, before data transmission is performed, information interaction is performed on data to be transmitted between a source node and a target node that need to perform data transmission. The local node (hereinafter sometimes also referred to as a data transmission initiating node or a data transmission requesting node) sends the data information acquisition request to other nodes, and the data information acquisition request contains the theme and the type of the data required by the local node and the data with the theme and the type stored in the local node, so that the other nodes can find the overlapped data existing with the local node and process the data in advance, thereby enabling the local node to determine an appropriate target node according to the response of the other nodes, and possibly only acquire the data which is not overlapped with the data stored by the local node in the data required by the local node from the target node. Because the signaling overhead of the data information acquisition request and the response thereof is not large, the transmission of overlapped data in subsequent data transmission can be avoided, and the network bandwidth can be effectively saved.

Fig. 2 shows a further schematic flow chart of a method of wireless data transmission according to an embodiment of the present invention. As shown in fig. 2, in the method P200, in addition to sending the data information acquisition request in step S210, a response of at least one other node to the data information acquisition request is received in step S220, and data information and node identification of one or more candidate target nodes are acquired from the response of the at least one other node in step S230, the data information of the candidate target nodes including information indicating: the candidate target nodes store data having the subject and type and not overlapping with data already stored in the local node, so as to determine the target node and data to be acquired from the target node from the candidate target nodes. The data stored by the candidate target node may have some or all of the types of data required by the local node.

Here, the candidate target node may be the other node itself that transmits a response including the data information of the candidate target node, or may be one or more nodes different from the other node. This will be described in detail below.

when the candidate target node may be the other node itself that sends a response containing the data information of the candidate target node, the response to the data information acquisition request may not contain the node identification, because the local node may obtain the node identification of the other node from the overhead of the communication packet with the other node (e.g., from the header of the communication packet containing the response).

thus, the local node can determine the target node from which to obtain the data required by the local node according to the received response.

a further schematic flow chart of a method of wireless data transmission according to an embodiment of the present invention is shown in fig. 3. In step S340, the local node determines a target node from which to obtain data required by the local node according to the data information and the node identifier in the received response. For example, the local node may select one or more candidate target nodes as target nodes to obtain data required by the local node according to data information provided by different candidate target nodes. If necessary, the local node can divide the required data and acquire the data from different target nodes. For example, when data stored by a plurality of candidate target nodes respectively have a part of types of data required by the local node, different types of data may be acquired from the plurality of candidate target nodes respectively.

After the target node is determined, the local node may initiate a data transmission request to the target node, wherein the data transmission request indicates specific data information required by the local node, and then receive the specific data required from the target node, thereby developing a data transmission process between the local node and the determined target node.

in one case, the requesting node has stored a portion of the desired data content and needs to download other portions of the desired data content, and when the target node has complete data content, the target node may split the complete data content according to the data already stored by the requesting node and transmit only a portion different from the data content already stored by the requesting node to the requesting node before transmitting the data to the requesting node.

In another case, the requesting node already stores a part of the required data content, and needs to download other parts of the required data content, and when the target node has complete data content, the requesting node may directly request the target node for a part of the required data content that does not overlap with the part already stored by the requesting node.

Any suitable method known in the art may be used for data transmission between nodes and will not be described in detail herein.

Steps S310-S330 in fig. 3 are the same as steps S210-S230 shown in fig. 2 and are not repeated here.

in the above-described embodiments of the present invention, discovery of overlapping information and simple determination of a target node from the overlapping information are achieved. In order to select an optimal target node and/or determine which data content to obtain from the target node to further improve the data transmission quality and the user service quality, in the following embodiments, the device information of the candidate target node is also considered to determine an optimized data transmission policy, for example, determine the target node and/or the transmission content.

In one embodiment of the invention, the wireless data transmission method further comprises obtaining device information of the candidate target node from the response of at least one other node. The device information includes information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions from a candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual electric quantity of the candidate target node, the geographic position of the candidate target node and data receiving and sending efficiency evaluation of the candidate target node.

in another embodiment of the present invention, the wireless data transmission method further includes obtaining the above-mentioned device information of the candidate target node from the candidate target node. For example, when the candidate target node is not the other node itself that transmits the response of the data information acquisition request, the device information of the candidate target node may be acquired by transmitting the data information acquisition request to the candidate target node.

With the continuous development of social networks, public concerns about certain hot events are consistent to a great extent, so that data requirements are also consistent, related data may be stored in peripheral equipment, and at the moment, data can be obtained from the peripheral equipment instead of downloading from a remote data server, so that the transmission bandwidth of the peripheral equipment can be fully utilized, and data distribution can be realized. Therefore, in one data transmission policy determination example, different data transmission policies need to be made according to the location of data storage. According to the geographical position of the candidate target node, which peripheral nodes store data required by the local node can be determined, and the target node is selected by adopting a proximity principle.

Other selection strategies may alternatively or additionally be employed in addition to the proximity principle. For example, the local node may determine the target node and/or which air interface to use for data transmission from the candidate target nodes based on one or more of hardware conditions (supported air interfaces, remaining power), network conditions (available transmission bandwidth of each air interface, interference situation of channels to its peripheral devices), and the like of the candidate target nodes. The general principle is to preferentially select candidate target nodes with good hardware conditions and excellent network conditions to transmit data with large data volume, for example.

For example, when real-time application processing needs to be performed on the requested data, the local node calculation power consumption, the power consumption of the local node for data transmission and the corresponding consumption of the target node can be estimated according to the hardware condition and the network condition of the local node and the target node. And if the processing efficiency of the target node is higher, selecting to process data at the target node by a parameter transmission mode. Otherwise, the data is calculated and processed at the local node.

In addition to the selection of the transmission node, a selection may also be made on the transmission content. In one embodiment of the present invention, the wireless data transmission method further includes: the target node and/or the data to be acquired from the target node is determined according to the transmission priority of the data stored by the candidate target node. For example, the local node may select a candidate target node having a high transmission priority for the stored data as the target node, and/or obtain data having a high transmission priority from such target node. In this embodiment, the data information of the candidate target node further includes information indicating a transmission priority. Alternatively, the data information of the candidate target node may also include information indicating a user interest rating and a user satisfaction rating of the data stored by the candidate target node, and the local node determines the transmission priority of the data stored by the candidate target node according to the user interest rating and the user satisfaction rating in the received data information of the candidate target node. The overall transmission priority determination principle is, for example, that data with a high user interest level (indicating a large user demand for data) and a high satisfaction degree has a high transmission priority.

In determining the transmission priority of the data, for example, the collected interest rating and satisfaction rating of the user on the data may be correlated with the data, and the transmission priority of each data may be determined according to the interest and satisfaction of the user.

The target node and/or the data to be acquired from the target node may also be determined based on a combination of data information of the candidate target node, device information, and transmission priority information of the data stored therein.

For example, in the case where the target node is sufficiently charged, all the required data is transmitted to the target node. And transmitting the data with high transmission priority under the condition that the target node has insufficient power but high channel efficiency.

For another example, in the case where the target node is low in power and the channel efficiency is normal, local storage should be performed for non-real-time traffic. If the storage space of the local node is insufficient, the data with low transmission priority is deleted so as to provide the storage space for the data with high transmission priority.

The method and the device can reduce the transmission of redundant information to the maximum extent by exchanging the device information and/or the transmission priority information such as the hardware condition, the network condition and the like of the candidate target node with other nodes, and meanwhile assist the data transmission request node to make transmission strategies such as the selection of the target node, the selection of a transmission link, the selection of the transmission priority and the like.

The above embodiments describe a scenario in which the local node acquires the required data from other nodes. In a scene that the local node uploads data to other nodes, similar to the wireless data transmission method, before data transmission, whether overlapping data exists in the network is judged, and data transmission is performed according to a judgment result.

Fig. 5 shows a schematic flow diagram of a method of wireless data transmission according to another embodiment of the invention. In this embodiment, the local node wishes to upload data to other nodes. In the wireless data transmission method P500, in step S510, a data upload verification request is sent to at least one other node, where the data upload verification request includes information indicating: the target node to which the local node uploads data, the data to be uploaded by the local node, and the subject and type of the data to be uploaded by the local node. Then, in step S520, in the case that it is known from the response of the at least one other node to the data upload verification request that the data with the topic and the type have been stored in the target node, only a portion of the data to be uploaded by the local node, which portion does not overlap with the data stored in the target node, is uploaded to the target node. Of course, the wireless data transmission method P500 implicitly includes a step in which the local node receives a response to the data upload verification request from at least one other node, and a step in which the local node obtains information of the data with the topic and type stored in the target node from the response to the data upload verification request from the at least one other node.

In the above embodiment, before data transmission, information interaction is performed on data to be transmitted between a source node and a target node that need to perform data transmission, so that a local node can only upload data that does not overlap with data stored in the target node to the target node. Because the signaling overhead of the data uploading verification request and the response of the data uploading verification request is not large, the transmission of overlapped data in subsequent data transmission can be avoided, and the network bandwidth can be effectively saved.

According to a data information acquisition request or a data uploading verification request sent by a local node (serving as a source node), a temporary data demand-based network can be formed, wherein the network consists of all nodes containing data required by the local node or nodes needing to receive uploading data from the local node.

In one embodiment of the invention, the local nodes and other nodes form a distributed network relationship. That is, the local node may send data information acquisition requests/data upload verification requests to a plurality of other nodes and receive corresponding responses from some or all of the plurality of other nodes. For example, another node containing the data of the topic and type required by the local node may send a response to the data information obtaining request to the local node, where the response contains the data information and the node identifier of a candidate target node, that is, the other node itself. For another example, a node that needs or is willing to receive data uploaded by the local node among the other nodes (as target nodes) may send a response to the local node for the data upload verification request, where the response includes data stored in the node (as target nodes) that has the subject and type of the data to be uploaded by the local node.

under the distributed network relationship, the local node may send a data information acquisition request to a neighbor node and/or a remote server in an active neighbor list stored by the local node, for example, through dedicated signaling or predetermined broadcast signaling. Accordingly, the local node may also send a data upload verification request to one or more neighbor nodes in the active neighbor list and/or a remote server through dedicated signaling or predetermined broadcast signaling. The neighbor nodes with which the local node can perform good communication are stored in the active neighbor list, and the active neighbor list can be preset in the local node, and the local node can regularly maintain the stored active neighbor list according to the communication state.

Fig. 4 shows a schematic flow diagram of an example of a method of maintaining an active neighbor list. As shown in fig. 4, the local node may periodically transmit or receive a probe signal to or from a neighbor node in a communicable range (step S410); and maintains an active neighbor list according to the received neighbor node 'S response to the probe signal or the neighbor node' S quality of the probe signal (step S420). For example, if a good-quality probe signal or probe signal response sent by a neighbor node not included in the active neighbor list is received, the neighbor node is added into the active neighbor list; on the other hand, if the quality probe signal or probe signal response of a certain neighbor node in the active neighbor list is not received within a predetermined time period, or the quality of the quality probe signal or probe signal response from the neighbor node is lower than a predetermined quality requirement, the neighbor node is deleted from the active neighbor list.

In another embodiment of the invention, the local nodes and other nodes form a centralized network relationship. That is, the local node may send a data information acquisition request/data upload verification request to a specific node in the network as a central server, which responds to the local node. The local node determines the target node/transmission content of the data transmission based on the response of the central server node. For example, as a response to the data information acquisition request, the central server node may include in the response data information and node identifications of a plurality of nodes in the network as candidate target nodes. In response to the data upload verification request, the central server node may include in the response data stored in the target node having the subject and type of data to be uploaded by the local node. The candidate target node or target nodes may be one or more nodes different from the central server node and may also comprise the central server node itself. The central server node may be a server with independent functions, or any other node in the network that integrates the above functions.

Under a centralized network relationship, information is collected by a central server node about data stored by various nodes in the network. For example, in the case where data is added, deleted, or changed in a node in the network, the node may transmit a data registration request including information indicating the added, deleted, or changed data to the central server node for use when the central server node determines that the data is overlapped. The central server searches the information of the data stored in each node, judges the overlapping condition of the data required to be transmitted (downloaded or uploaded) by the local node and the data stored in each node in the network, and further makes a response to a data information acquisition request and/or a data uploading verification request.

By way of example and not limitation, the central server node may index with node identification, and may index with topics of data such as events. If the node identifier is used as an index, a correspondence between the node identifier (such as the MAC address of the node) and specific data information stored therein needs to be established. If the index based on the theme is used, all the collected data contents on all the nodes need to be numbered, and meanwhile, the corresponding relation between the theme of the data and the type of the data and the identification of the node where the data is located is established. The data content in this case refers not only to data about a certain subject (e.g., a certain news), but also includes specific stored content of the data (e.g., only a certain segment of a certain news). Therefore, the central server node can intelligently arrange the registered information, including updating, sorting (for example, according to the updating frequency or hot degree), deleting and the like of the same type or the same theme, and make an information directory table to improve the speed of positioning the target data information.

In a centralized network relationship, when determining a target node and/or data to be acquired from the target node according to a transmission priority of the data, information of a user interest rating and a user satisfaction rating of the data of each node may also be stored on the central server node. The respective nodes may send the user interest rating and the user satisfaction rating of the data stored by themselves to the central server node, for example, through a data registration request or other message. Similarly, the central server node may associate the user interest rating and the user satisfaction rating with the subject/type of the data or with the node identification, so that the user interest rating and the user satisfaction rating of the specific data can be sent to the data transmission initiating node together with other data information of the candidate target node containing the specific data when receiving a data information acquisition request sent by the data transmission initiating node (or called as a data transmission requesting node). Alternatively, the central server node may determine the transmission priority of the data stored by the specific node according to the user interest rating and the user satisfaction rating of the data stored by the specific node, and send the transmission priority of the data to the data transmission initiating node together with other data information of the candidate target node containing the data in response to the data information obtaining request sent by the data transmission initiating node.

The wireless data transmission method according to the embodiment of the present invention described above from the perspective of the data transmission initiation side is described below with reference to fig. 6 and 7 from the perspective of the data transmission response side.

Fig. 6 shows a schematic flow diagram of a method of wireless data transmission according to an embodiment of the invention. In this embodiment, the local node, as a data transmission responding node, receives a data information obtaining request of a data transmission initiating node. As shown in fig. 6, in the wireless data transmission method P600, in step S610, the local node receives a data information acquisition request from a requesting node. In step S620, the local node acquires the data information of the requesting node from the data information acquisition request, including information indicating: the subject and type of data required by the requesting node, and the data having the subject and type already stored in the requesting node. In step S630, the local node sends a response to the data information obtaining request to the requesting node according to the data information of the requesting node, so that the requesting node determines a target node from which to obtain the data required by the requesting node according to the response.

More specifically, the response to the data information acquisition request may include the data information and the node identification of one or more candidate target nodes. The data information of the candidate target node includes information indicating: the candidate target nodes store data having the subject and type and not overlapping with data already stored in the requesting node, so that the requesting node can determine the target node and the data to be obtained from the target node from the candidate target nodes.

Here, in the distributed network relationship, the local node itself data information and the node identification as the candidate target node are included in the response sent by the local node to the requesting node. In the centralized network relationship, the local node serves as a central server node, and a response sent to the requesting node includes data information and node identification of one or more nodes serving as candidate target nodes (the central server node itself may also serve as a candidate target node) in the network including data requested by the requesting node.

When the local node is determined as the target node by the requesting node, the local node may receive a data transmission request of the requesting node and send data required by the requesting node to the requesting node, thereby spreading data transmission between the requesting node and the local node.

In the above embodiments of the present invention, discovery of overlapping information is achieved, so that a requesting node can simply determine a target node according to the overlapping information. In order to select the optimal target node and/or determine which data content to acquire from the target node to further improve the data transmission quality and the user service quality, in the following embodiments, the response of the local node to the data information acquisition request may further include device information of the candidate target node, including information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions from a candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual electric quantity of the candidate target node, the geographic position of the candidate target node and data receiving and sending efficiency evaluation of the candidate target node. Thereby, the requesting node is enabled to determine an optimized data transmission strategy, e.g. determining target nodes and/or transmitting content, taking into account the device information of the candidate target nodes.

In addition, the data information of the candidate target node in the response to the data information acquisition request by the local node may further include information indicating a transmission priority of the data of the candidate target node, or information indicating a user interest rating and a user satisfaction rating of the data stored by the candidate target node. In the latter case, the transmission priority of the data stored by the candidate target node is determined by the requesting node according to the user interest rating and the user satisfaction rating in the received data information of the candidate target node. Thereby, the requesting node is enabled to select the target node and/or the data to be retrieved from the target node according to the transmission priority of the data.

the above embodiment describes a scenario in which the requesting node acquires the required data from the target node (the local node or a node determined from candidate target nodes indicated by the local node). In a scenario where a requesting node uploads data to a target node (a local node or a node determined from candidate target nodes indicated by the local node), similar to the above wireless data transmission method, before data transmission is performed, it is determined whether overlapping data exists in a network, and data transmission is performed according to a determination result.

Fig. 7 shows a schematic flow diagram of a method of wireless data transmission according to another embodiment of the invention. In this embodiment, the local node, as a data transmission responding node, receives a data upload verification request from the data transmission initiating node. As shown in fig. 7, in step S710, the local node receives a data upload verification request from the requesting node. In step S720, information indicating the following is acquired from the data upload verification request: a target node to which the requesting node is to upload data, the data to be uploaded by the requesting node, and the subject and type of data to be uploaded by the requesting node. In step S730, a response to the data upload verification request is sent to the requesting node, where the response includes information indicating that the data with the topic and type has been stored in the target node. Therefore, the data transmission request node can upload only the part of the data to be uploaded by the request node, which is not overlapped with the data stored in the target node, to the target node.

In the case that the requesting node and other nodes form a distributed network relationship, the wireless data transmission method according to the above embodiments shown in fig. 6 and 7 may further include receiving a probe signal sent by the requesting node and sending a probe signal response to the requesting node; or periodically transmitting the detection signal to the neighbor nodes including the request node and receiving the detection signal response of the neighbor nodes.

In the case that the requesting node and other nodes form a centralized network relationship, the local node may serve as a central server node, and the wireless data transmission method according to the above embodiments shown in fig. 6 and 7 may further include receiving a data registration request sent by each node in the network, including the requesting node, the data registration request including information indicating data added, deleted, or changed by the corresponding node.

Furthermore, in the case where the requesting node is in a centralized network relationship with other nodes, the wireless data transmission method according to the above embodiments shown in fig. 6 and 7 may further include receiving information on user interest ratings and user satisfaction ratings of data stored by the respective nodes in the network, for example, transmitted by data registration requests or other messages; and/or determining a transmission priority of the data stored by the corresponding node according to the information of the user interest rating and the user satisfaction rating of the data stored by the corresponding node. Accordingly, the data information of the candidate target node in the response sent by the local node to the requesting node may further include: information indicating a transmission priority of data stored by the candidate target node, or information indicating a user interest rating and a user satisfaction rating of data stored by the candidate target node.

The wireless data transmission methods according to the above-described embodiments of the present invention may be combined with each other. For example, a single wireless data transmission method may have various steps related to data download and various steps related to data upload at the data transmission initiation side. A single wireless data transmission method may also have various steps related to data download on the data transmission initiation side and various steps related to data upload on the data transmission response side. And so on, which are not listed here.

methods of wireless data transmission according to some embodiments of the present invention are described above. Wireless data transmission devices according to some embodiments of the present invention are described below.

Fig. 8 to 12 describe a wireless data transmission apparatus according to an embodiment of the present invention from the perspective of a data transmission originating-side node. Fig. 8 shows a schematic block diagram of a wireless data transmission device according to an embodiment of the invention. As shown in fig. 8, the wireless data transmission apparatus 800 includes a data information acquisition request unit 810, configured to send a data information acquisition request, so as to determine a target node from which to acquire data required by a local node (the wireless data transmission apparatus or an apparatus in which the wireless data transmission apparatus is located) according to a response of at least one other node to the data information acquisition request. Wherein, the data information acquisition request contains data information of the local node, including information indicating the following: the topic and type of data required by the local node, and the data with the topic and type stored in the local node.

fig. 9 shows a further schematic block diagram of a wireless data transmission device according to an embodiment of the present invention. As shown in fig. 9, the wireless data transmission apparatus 900 includes a data information acquisition request unit 910 and an information extraction unit 920. The data information obtaining request unit 910 is configured to, in addition to sending the data information obtaining request, receive a response from at least one other node to the data information obtaining request. The information extracting unit 920 is configured to obtain data information and node identifiers of one or more candidate target nodes from the response of the at least one other node. Wherein the data information of the candidate target node comprises information indicating: the candidate target nodes store data having the above-mentioned subjects and types and not overlapping with the data already stored in the local node, so as to determine the target node and the data to be acquired from the target node from the candidate target nodes.

Fig. 10 shows a further schematic block diagram of a wireless data transmission device according to an embodiment of the present invention. As shown in fig. 10, the wireless data transmission apparatus 1000 includes a data information acquisition requesting unit 1010, an information extracting unit 1020, and a target node determining unit 1030. Here, the data information acquisition requesting unit 1010 and the information extracting unit 1020 have the same functions as the data information acquisition requesting unit 910 and the information extracting unit 920 in fig. 9, respectively. The target node determining unit 1030 is configured to determine a target node from which to obtain data required by the local node according to the data information and the node identification of the one or more candidate target nodes extracted by the information extracting unit 920.

fig. 11 shows a further schematic block diagram of a wireless data transmission device according to an embodiment of the present invention. As shown in fig. 11, the wireless data transmission apparatus 1100 includes a data information acquisition request unit 1110, an information extraction unit 1120, a target node determination unit 1130, and a data download unit 1140. Among them, the data information acquisition requesting unit 1110, the information extracting unit 1120, and the target node determining unit 1130 perform the same functions as the data information acquisition requesting unit 1010, the information extracting unit 1020, and the target node determining unit 1030 shown in fig. 10, respectively. The data download unit 1140 is configured to send a data transmission request indicating data required by the local node to the target node determined by the target node determination unit 1130, and receive data required by the local node from the target node, thereby performing a data transmission process with the target node.

In another embodiment of the present invention, the information extraction unit (920, 1020, 1120) is further configured to obtain device information of the candidate target node from the response of the at least one other node, including information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions from a candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual electric quantity of the candidate target node, the geographic position of the candidate target node and data receiving and sending efficiency evaluation of the candidate target node. In this embodiment, the target node determining unit (1030, 1130) may further determine the target node from the candidate target nodes according to both the data information and the device information of the candidate target nodes.

In another embodiment of the present invention, the information extracting unit (920, 1020, 1120) is further configured to obtain the above device information of the candidate target node from the candidate target node. For example, a data information acquisition request is sent to a candidate target node by a data information acquisition request unit (810, 910, 1010, 1110), and device information of the candidate target node is acquired from a response of the candidate target node to the data information acquisition request by an information extraction unit.

in a further embodiment of the invention, the information extraction unit (920, 1020, 1120) is further configured to obtain information indicating a transmission priority of the data stored by the candidate target node from the response of the at least one other node. In this embodiment, the target node determination unit (1030, 1130) may also determine the target node and/or the data to be acquired from the target node according to a transmission priority of the data stored by the candidate target node.

in another embodiment of the present invention, the information extracting unit (920, 1020, 1120) is further configured to obtain information indicating a user interest rating and a user satisfaction rating of the data stored by the candidate target node from the response of the at least one other node. In this embodiment, the information extraction unit (920, 1020, 1120) may further determine a transmission priority of data stored by the candidate target node according to the user interest rating and the user satisfaction rating, and the target node determination unit (1030, 1130) may further determine the target node and/or data to be acquired from the target node according to the transmission priority of the data stored by the candidate target node.

By way of example and not limitation, the data information acquisition request unit (810, 910, 1010, 1110) may send the data information acquisition request to the neighbor nodes in the active neighbor list maintained by the local node and/or the remote server through dedicated signaling or predetermined broadcast signaling.

According to another embodiment of the present invention, the wireless data transmission apparatus (800, 900, 1000, 1100) may further include a storage unit (not shown) for storing the active neighbor list.

According to another embodiment of the present invention, the wireless data transmission apparatus (800, 900, 1000, 1100) may further include a neighbor node probing unit (not shown) for periodically transmitting or receiving a probing signal to or from a neighbor node within a communicable range, and maintaining an active neighbor list held by the local node according to a received neighbor node response to the probing signal or a quality of the probing signal of the neighbor node.

According to another embodiment of the present invention, the wireless data transmission apparatus (800, 900, 1000, 1100) may further include a data registration request unit operable to transmit a data registration request to at least one other node in a case where data is added, deleted, or changed in the local node, the data registration request including information indicating the added, deleted, or changed data.

Fig. 12 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention. As shown in fig. 12, the wireless data transmission apparatus 1200 includes a data upload verification request unit 1210, an information extraction unit 1220, and a data upload unit 1230. The data upload verification request unit 1210 is configured to send a data upload verification request to at least one other node, where the data upload verification request includes information indicating: the target node to which the local node uploads data, the data to be uploaded by the local node, and the subject and type of the data to be uploaded by the local node. The information extracting unit 1220 is configured to obtain, from the response of the at least one other node to the data upload verification request, information of data already stored in the target node, for example, information of data already stored in the target node that has a subject and a type of data to be uploaded by the local node. The data uploading unit 1230 is configured to, in a case where the data with the theme and the type is already stored in the target node, upload only a portion of the data to be uploaded by the local node, which does not overlap with the data stored in the target node, to the target node.

It should be understood that the various elements of the wireless data transmission device shown in fig. 12 may also be included in the wireless data transmission devices shown in fig. 8-11. For example, when the respective units in fig. 12 are included in the wireless data transmission apparatus (900, 1000, 1100), the information extraction unit 1220 may be combined with the information extraction unit (920, 1020, 1120) into one unit.

Fig. 13 to 14 describe a wireless data transmission apparatus according to an embodiment of the present invention from the perspective of a data transmission response side node.

fig. 13 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention. As shown in fig. 13, the wireless data transmission apparatus 1300 includes a data information feedback unit 1310 and an information extraction unit 1320. The data information feedback unit 1310 is configured to receive a data information obtaining request from a requesting node, and send a response to the data information obtaining request to the requesting node according to data information of the requesting node included in the data information obtaining request, so that the requesting node determines a target node from which data required by the requesting node is obtained according to the response. The information extraction unit 1320 is configured to acquire the data information of the requesting node from the data information acquisition request, and includes information indicating: the subject and type of data required by the requesting node, and the data having the subject and type already stored in the requesting node.

As a specific embodiment, the response to the data information obtaining request includes data information of one or more candidate target nodes and a node identifier, where the data information of the candidate target nodes includes information indicating: the candidate target nodes store data which have the theme and type and do not overlap with the data stored in the requesting node, so that the requesting node determines the target node and the data to be acquired from the target node from the candidate target nodes.

As another specific embodiment, the data information of the candidate target node further includes: information indicating a transmission priority of data stored by the candidate target node, or information indicating a user interest rating and a user satisfaction rating of data stored by the candidate target node.

as another specific embodiment, the response to the data information acquisition request further includes device information of the candidate target node, including information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions from a candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual electric quantity of the candidate target node, the geographic position of the candidate target node and data receiving and sending efficiency evaluation of the candidate target node.

According to another embodiment of the present invention, the wireless data transmission apparatus 1300 may further include a data registration unit (not shown) for receiving a data registration request sent by the requesting node to the local node, the data registration request including information indicating data added, deleted or changed by the requesting node.

according to another embodiment of the present invention, the wireless data transmission apparatus 1300 may further include a data transmission unit (not shown) for receiving a data download request from the requesting node and transmitting the data requested to be downloaded by the requesting node to the requesting node, thereby performing data transmission with the requesting node.

Fig. 14 shows a schematic block diagram of a wireless data transmission device according to another embodiment of the present invention. As shown in fig. 14, the wireless data transmission apparatus 1400 includes a data verification unit 1410 and an information extraction unit 1420. The data verification unit 1410 is configured to receive a data upload verification request from a requesting node. The information extraction unit 1420 is configured to obtain, from the data upload verification request, information indicating: a target node to which the requesting node is to upload data, the data to be uploaded by the requesting node, and the subject and type of data to be uploaded by the requesting node. The data verification unit 1410 is further configured to send a response to the data upload verification request to the requesting node, where the response includes information indicating that the data with the subject and type has been stored in the target node.

according to another embodiment of the present invention, the wireless data transmission apparatus 1400 may further include a data transmission unit (not shown) for receiving a data upload request from the requesting node, so as to perform data transmission with the requesting node.

it should be understood that each unit in the wireless data transmission apparatus shown in fig. 14 may also be included in the wireless data transmission apparatus shown in fig. 13. In this case, for example, the information extraction unit 1320 may be merged with the information extraction unit 1420 into one unit. In addition, the wireless data transmission apparatuses 1300 and 1400 may use the same data transmission unit.

For more details of the wireless data transmission apparatus according to the embodiment of the present invention, reference may be made to the above description of the wireless data transmission method according to the embodiment of the present invention, and details are not repeated here.

Further, the wireless data transmission apparatuses according to the above-described embodiments of the present invention may be combined with each other. For example, a single wireless data transmission apparatus may have various units related to data download and various units related to data upload at the data transmission initiation side. A single wireless data transmission apparatus may also have various units related to data download on the data transmission initiation side and various units related to data upload on the data transmission response side. And so on, which are not listed here.

the above describes a wireless data transmission method and apparatus according to an embodiment of the present invention. Application examples of the wireless data transmission method and apparatus will be described below.

Application example 1

For example, in a subway car, many people can use handheld devices for information access. Given that a particular event has occurred shortly before, there are many people already aware of the event over the network and there are text, audio and video reports stored in the handheld device that are associated with the event. Assuming that a central server (central server node) is provided in the car, all the handheld devices (wireless data transmission devices) will perform data registration with the central server on a voluntary basis with all the information stored locally. The central server can sort the event information according to the registration frequency or the access frequency of the event, and respectively record the corresponding relation between the event information and the event information holding equipment.

if a new passenger enters the car and wants to know the beginning and end of the event and the latest progress of the event (or the passenger only needs partial information about the event and wants to know more information), the passenger first sends a query request (data information acquisition request) based on the event to the central server, and the request indicates the information currently existing in the passenger's handheld device and what information is needed. Since this event belongs to hot news, with higher priority (i.e., transmission priority) in the central server and higher ranking, the passenger can be sent a response quickly indicating which devices around contain the information the passenger needs. The passenger can optionally send a data information acquisition request to all or part of the terminals with the information according to the response content, and the peripheral equipment determines whether the required information still exists after receiving the response and simultaneously feeds back the corresponding data information and equipment information to the passenger. The passenger's handset decides which air interface to use and to which handsets to send data transmission requests based on this information, and then data transmission is possible. If the passenger wants to learn about the latest progress of the event, a conventional data connection request may also be made to a remote server providing information services.

More specifically, take an example where a user (requesting node) wishes to obtain 2013 video of a nobel literature prize awarding ceremony. The user locally stores the video of the first 10 minutes of the video and wants to acquire the video of the remaining 50 minutes, and the data information acquisition request sent by the device of the user includes the following data information:

After sending the request, if a certain node (response node) finds that the node has a video file meeting the requirements, the node sends a data information acquisition response to the request node as follows:

After receiving the information, the requesting node requests the responding node to transmit the video file from 10-60 minutes.

Application example two

When a group of users take a wearable device such as google glass to go to outing at the same time, much of what they see is duplicated. For example they will all see the same mountain, river, although the viewing angle will be somewhat different. When the users want to save the images they see to the network, if there is a user who has transmitted the photos or videos they have taken to the network and sent a data registration request for this information to the central server before, then other users find that there is already similar information by querying (data upload verification request) the central server (or the network receives the data transmission request of other users before) before transmitting their own local image information, then these users do not have to transmit the view seen in google glass of each person to the network, but only transmit the unique information each user sees, and the network is responsible for information composition. Therefore, the transmission of redundant information can be reduced, and the network bandwidth can be saved.

More specifically, take the example where a user (requesting node) wishes to upload a video shot locally of a 12.03 tour to a server. These video files record the main contents of their shots in a summary manner, such as the video segment mainly recording mountains, rivers or characters. The requesting node locally has two sections of videos, wherein one section of video summary information is a mountain, and the other section of video summary information is a person. The two (or combined into one) data upload verification requests sent by the requesting node contain the following information:

after sending the request, the server a finds that the video with the abstract of mountain is stored on the server a through checking, but the video with the abstract of person is not stored on the server a, and then the server a sends a data uploading verification request response containing the following information to the request node:

Target node store topics

Destination node storing data

destination node data type

12.03 travel video

Mountain

Video

After receiving the information, the requesting node transmits a video file with a person as a summary to the target node (server a).

it should be understood that the above-described embodiments and examples are illustrative rather than exhaustive, and the disclosure should not be construed as limited to any particular embodiment or example. In addition, in the above embodiments and examples, steps of the method or modules of the apparatus are denoted with numerical labels. It will be understood by those of ordinary skill in the art that these numerical designations are merely intended to literally distinguish one step or module from another, and are not intended to imply a sequence or any other limitation.

it should be understood that each constituent element, unit, in each apparatus according to the embodiment of the present invention may be configured by software, firmware, hardware, or a combination thereof. The specific means or manner in which the configuration can be used is well known to those skilled in the art and will not be described further herein. In the case of implementation by software or firmware, a program constituting the software is installed from a storage medium or a network to a computer having a dedicated hardware configuration, and the computer can execute various functions and the like when various programs are installed.

Fig. 15 illustrates an exemplary block diagram of a structure of a computer in which embodiments/examples of the present invention may be implemented. In fig. 15, a Central Processing Unit (CPU) 1501 executes various processes in accordance with a program stored in a Read Only Memory (ROM) 1502 or a program loaded from a storage section 1508 to a Random Access Memory (RAM) 1503. In the RAM1503, data necessary when the CPU1501 executes various processes and the like is also stored as necessary. The CPU1501, the ROM1502, and the RAM1503 are connected to each other via a bus 1504. An input/output interface 1505 is also connected to the bus 1504.

The following components are connected to the input/output interface 1505: an input section 1506 (including a keyboard, a mouse, and the like), an output section 1507 (including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker, and the like), a storage section 1508 (including a hard disk, and the like), a communication section 1509 (including a network interface card such as a LAN card, a modem, and the like). The communication section 1509 performs communication processing via a network such as the internet. A drive 1510 may also be connected to the input/output interface 1505, as desired. A removable medium 1511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like can be mounted on the drive 1510 as necessary, so that the computer program read out therefrom is installed into the storage section 1508 as necessary.

In the case where the above-described series of processes is realized by software, a program constituting the software is installed from a network such as the internet or a storage medium such as the removable medium 1511.

It should be understood by those skilled in the art that such a storage medium is not limited to the removable medium 1511 shown in fig. 15 in which the program is stored, distributed separately from the apparatus to provide the program to the user. Examples of the removable medium 1511 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read only memory (CD-ROM) and a Digital Versatile Disk (DVD)), a magneto-optical disk (including a Mini Disk (MD) (registered trademark)), and a semiconductor memory. Alternatively, the storage medium may be the ROM1502, a hard disk included in the storage section 1508, or the like, in which programs are stored and which are distributed to users together with the apparatus including them.

The invention also provides a program product with machine readable instruction codes stored. The instruction codes are read and executed by a machine, and can perform the audio signal processing method according to the embodiment of the present invention.

Accordingly, a storage medium carrying the program product having machine-readable instruction code stored thereon is also included in the present invention. Including, but not limited to, floppy disks, optical disks, magneto-optical disks, memory cards, memory sticks, and the like.

In the foregoing description of embodiments of the invention, features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with or instead of the features of the other embodiments.

it should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.

In addition, the method of the present invention is not limited to be performed in the time sequence described in the specification, and may be performed in other time sequences, in parallel, or independently. Therefore, the order of execution of the methods described in this specification does not limit the technical scope of the present invention.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it should be understood that the above-described embodiments are only for illustrating the present invention and do not constitute a limitation to the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is to be defined only by the claims appended hereto, and by their equivalents.

Claims

1. a method of wireless data transmission, comprising:

sending a data information acquisition request to determine a target node from which to acquire data required by the local node based on a response of at least one other node to the data information acquisition request,

Wherein, the data information acquisition request contains data information of the local node, including information indicating the following: the topic and type of data required by the local node, and data having said topic and type already stored in the local node, an

Wherein the sending of the data information acquisition request includes: sending the data information acquisition request to a neighbor node in an active neighbor list stored by the local node through a special signaling or a preset broadcast signaling;

Receiving a response of the at least one other node to the data information acquisition request; and obtaining data information and node identification of one or more candidate target nodes from the response of the at least one other node, the data information of the candidate target nodes including information indicating: the candidate target nodes store data having the subject and type and not overlapping with data already stored in the local node, so as to determine the target node and data to be acquired from the target node from the candidate target nodes.

2. The method of claim 1, further comprising:

Obtaining device information for the candidate target node from the response of the at least one other node, including information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions of the candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual capacity of the candidate target node, the geographic position of the candidate target node and data transceiving efficiency evaluation of the candidate target node.

3. The method of claim 1, further comprising:

Periodically transmitting or receiving a probe signal to or from a neighbor node within a communicable range; and

Maintaining the active neighbor list according to a received neighbor node's response to a probe signal or a quality of a neighbor node's probe signal.

4. the method of claim 1, further comprising:

And sending a data registration request to the at least one other node in the case that data is added, deleted or changed in the local node, the data registration request including information indicating the added, deleted or changed data.

5. The method of claim 1, further comprising:

sending a data upload verification request to at least one other node, the data upload verification request containing information indicating: a target node to which the local node uploads data, the data to be uploaded by the local node, and the theme and type of the data to be uploaded by the local node; and

And in the case that the data with the theme and the type are stored in the target node is known from the response of the at least one other node to the data uploading verification request, only the part, which is not overlapped with the data stored in the target node, of the data to be uploaded by the local node is uploaded to the target node.

6. The method of claim 1, further comprising: determining a target node and/or data to be acquired from the target node according to the transmission priority of the data stored by the candidate target node;

wherein the data information of the candidate target node further comprises information indicating the transmission priority; or

the data information of the candidate target node further includes information indicative of a user interest rating and a user satisfaction rating of the data stored by the candidate target node, and the method further includes determining the transmission priority as a function of the user interest rating and the user satisfaction rating.

7. A method of wireless data transmission, comprising:

Receiving a data information acquisition request from a request node, wherein the data information acquisition request is sent from the request node to a neighbor node in an active neighbor list saved by the request node through a special signaling or a predetermined broadcast signaling;

acquiring the data information of the request node from the data information acquisition request, wherein the data information comprises information indicating the following contents: the theme and the type of the data required by the requesting node and the data with the theme and the type stored in the requesting node; and

And sending a response to the data information acquisition request to the request node according to the data information of the request node, so that the request node determines a target node from which the data required by the request node is acquired according to the response.

8. The method of claim 7, wherein the response to the data information acquisition request contains data information and a node identification for one or more candidate target nodes, the data information for the candidate target nodes including information indicating: the candidate target node stores data having the subject and type and not overlapping with the data already stored in the requesting node, so that the requesting node determines the target node and the data to be obtained from the target node from the candidate target node.

9. the method of claim 8, wherein the response to the data information acquisition request further includes device information for the candidate target node, including information indicating at least one of: the method comprises the following steps of obtaining information of interference conditions of the candidate target node to peripheral equipment of the candidate target node, types of air interfaces supported by the candidate target node and corresponding available bandwidths, residual capacity of the candidate target node, the geographic position of the candidate target node and data transceiving efficiency evaluation of the candidate target node.

10. The method of claim 7, further comprising:

and receiving a data registration request sent by the request node to a local node, wherein the data registration request comprises information indicating the data added, deleted or changed by the request node.

11. the method of claim 7, further comprising:

Receiving a data uploading verification request from a requesting node;

Obtaining information indicating the following from the data upload verification request: the data uploading method comprises the following steps that a target node to which data are to be uploaded by a request node, the data to be uploaded by the request node and the theme and type of the data to be uploaded by the request node are obtained; and

Sending a response to the data upload verification request to the requesting node, the response including information indicating that data having the topic and type has been stored in the target node.

12. The method of claim 8, wherein the data information of the candidate target node further comprises: information indicating a transmission priority of the data stored by the candidate target node, or information indicating a user interest rating and a user satisfaction rating of the data stored by the candidate target node.

13. A wireless data transmission apparatus, comprising:

a data information obtaining unit, configured to send a data information obtaining request and receive a response from at least one other node to the data information obtaining request, so as to determine a target node from which to obtain data required by a local node according to the response from the at least one other node to the data information obtaining request,

The data information acquisition unit is further configured to send the data information acquisition request to a neighbor node in an active neighbor list saved by the local node through dedicated signaling or predetermined broadcast signaling; and

an information extraction unit, configured to obtain data information and a node identification of one or more candidate target nodes from a response of the at least one other node, where the data information of the candidate target nodes includes information indicating: the candidate target nodes store data having the subject and type and not overlapping with data already stored in the local node, so as to determine the target node and data to be acquired from the target node from the candidate target nodes.

14. The wireless data transmission apparatus of claim 13, further comprising:

A data upload verification request unit, configured to send a data upload verification request to at least one other node, where the data upload verification request includes information indicating: a target node to which the local node uploads data, the data to be uploaded by the local node, and the theme and type of the data to be uploaded by the local node;

An information extraction unit, configured to obtain information of the data stored in the target node from a response of the at least one other node to the data upload verification request; and

And the data uploading unit is used for uploading only a part, which is not overlapped with the data stored in the target node, of the data to be uploaded by the local node to the target node under the condition that the data with the theme and the type are stored in the target node.

15. A wireless data transmission apparatus, comprising:

A data information feedback unit, configured to receive a data information acquisition request from a requesting node, and send a response to the data information acquisition request to the requesting node according to data information of the requesting node included in the data information acquisition request, so that the requesting node determines, according to the response, a target node from which data required by the requesting node is acquired, where the data information acquisition request is sent from the requesting node to a neighbor node in an active neighbor list stored in the requesting node via a dedicated signaling or a predetermined broadcast signaling; and

an information extraction unit configured to acquire, from the data information acquisition request, data information of the requesting node, including information indicating: the subject and type of data required by the requesting node, and the data having the subject and type already stored in the requesting node.

16. The wireless data transmission apparatus of claim 15, wherein the response to the data information acquisition request includes data information and a node identification of one or more candidate target nodes, the data information of the candidate target nodes including information indicating: the candidate target node stores data having the subject and type and not overlapping with the data already stored in the requesting node, so that the requesting node determines the target node and the data to be obtained from the target node from the candidate target node.

17. The wireless data transmission apparatus of claim 15, further comprising:

A data verification unit configured to receive a data upload verification request from a requesting node, and send a response to the data upload verification request to the requesting node, the response including information indicating data stored in a target node having a subject and a type of data to be uploaded by the requesting node,

Wherein the information extraction unit is further configured to obtain, from the data upload verification request, information indicating: the target node to which the requesting node is to upload data, the data to be uploaded by the requesting node, and the subject and type of data to be uploaded by the requesting node.