CN114845289B - Multi-hop networking method, device, equipment and storage medium - Google Patents

Multi-hop networking method, device, equipment and storage medium Download PDF

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Publication number
CN114845289B
CN114845289B CN202210383835.4A CN202210383835A CN114845289B CN 114845289 B CN114845289 B CN 114845289B CN 202210383835 A CN202210383835 A CN 202210383835A CN 114845289 B CN114845289 B CN 114845289B
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terminal
hop
network
discovery
service
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CN114845289A (en
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杨可心
毕奇
张婷
赵静
唐铭蔚
陈学亮
李宝荣
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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Priority to PCT/CN2022/141149 priority patent/WO2023197671A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosure provides a multi-hop networking method, a multi-hop networking device, multi-hop networking equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: the method comprises the steps that a first terminal performs equipment discovery and service discovery according to the identity of a P2P terminal, and service information of a neighbor WiFi direct connection group manager GO is obtained; selecting a target GO as a previous hop according to the GO service information; accessing a target GO in a traditional client LC mode; P2P composition is established to be GO based on WiFi direct connection. According to the embodiment of the application, each terminal in the multi-hop network is used as the GO of one P2P group, so that the flexible expansion and dynamic adjustment of the network are facilitated.

Description

Multi-hop networking method, device, equipment and storage medium
Technical Field
The disclosure relates to the technical field of communication, and in particular relates to a multi-hop networking method, a device, equipment and a storage medium.
Background
Under a WiFi Direct mechanism, each node performs device discovery and service discovery according to the identity of a P2P terminal, and then decides that the own role is GO (Group Owner) or GC (Group Client) through terminal negotiation, so as to complete the construction of the P2P Group. And then other terminals can access with the identities of GC or LC (Legacy Client), so that the data transmission of the terminals in the group in a short distance is realized. However, the original WiFi Direct is only used for intra-group communication, and multi-hop connection of inter-group devices is often more needed to be realized in a large-scale scene.
It should be noted that the information disclosed 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 constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure provides a multi-hop networking method, a device, equipment and a storage medium, which at least overcome the problem of poor multi-hop connection effect of inter-group equipment in the related technology 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 multi-hop networking method, applied to a first terminal, the method including:
performing device discovery and service discovery by using the identity of the P2P terminal to acquire service information of the neighbor WiFi direct connection group manager GO;
selecting a target GO as a previous hop according to the GO service information;
accessing a target GO in a traditional client LC mode;
P2P composition is established to be GO based on WiFi direct connection.
In one embodiment of the present disclosure, before performing device discovery and service discovery with the identity of the P2P terminal and obtaining service information of the neighboring WiFi direct group administrator GO, the method further includes:
Determining whether to be a 1 st hop node according to network information, wherein the network information comprises a network connection state and network signal strength of a first terminal;
device discovery and service discovery are carried out according to the identity of the P2P terminal, and state information of a neighbor WiFi direct connection group manager GO is obtained, wherein the method comprises the following steps:
and when the first terminal cannot be used as the 1 st hop node, performing device discovery and service discovery according to the identity of the P2P terminal, and acquiring the state information of the neighbor WiFi direct connection group manager GO.
In one embodiment of the present disclosure, the method further comprises:
and when the first terminal is the 1 st hop node, establishing a P2P composition to be GO based on WiFi direct connection.
In one embodiment of the present disclosure, the method further comprises:
receiving a device discovery and service discovery request of a second terminal;
and responding to the equipment discovery and service discovery request of the second terminal, and sending a service discovery response, wherein the service discovery response carries GO service information, so that the second terminal judges whether to select the first terminal as a target GO or not based on the GO service information.
In one embodiment of the present disclosure, selecting a target GO as a last hop according to GO service information includes:
calculating a performance weighting value of the GO by weighting a plurality of parameters in the acquired GO information;
And when the performance weighted value of the GO with the maximum performance weighted value is larger than a preset performance threshold, selecting the GO with the maximum performance weighted value as the target GO as the last hop.
In one embodiment of the present disclosure, the GO service information includes GO state information including at least one of the following parameters, SSID of GO, and password:
terminal connection number, hop count, electric quantity, network signal strength and time delay.
In one embodiment of the present disclosure, the calculation formula for the performance weighting value of GO is as follows:
wherein W (i) represents a performance weighted value of GO, N (i) represents a terminal connection number, h (i) represents a hop count, P (i) represents an electric quantity, sc (i) represents a GO network signal strength, sw (i) represents a WiFi signal strength, t (i) represents a time delay, and N th Represents a threshold of the number of connections, M th Representing the threshold of hop count, T th Represents a time delay threshold, ω 1 、ω 2 、ω 3 、ω 4 、ω 5 And the weight of the parameters is represented, and the WiFi signal strength is measured when the first terminal discovers the neighbor GO.
In one embodiment of the present disclosure, performing device discovery and service discovery with an identity of a P2P terminal, and obtaining service information of a neighboring WiFi direct group administrator GO includes:
scanning on 1/6/11 channels according to the identity of the P2P terminal, and sending a Probe Request frame on each channel to perform device discovery;
If a Probe Response frame of a GO Response or a Beacon frame of a GO periodic broadcast is received in a channel, entering a service discovery process, and sending a service discovery request SD query, so that a neighbor cell WiFi direct connection group manager GO responds to the SD query, replying to the SD Response, wherein the SD Response comprises service information of the neighbor cell GO.
In one embodiment of the present disclosure, accessing a target GO in a legacy client LC manner includes:
and accessing the target GO in the LC role through the SSID and the password in the GO service information.
In one embodiment of the present disclosure, the method further comprises:
and the overall network topology construction and the routing selection are completed, and the transmission/request of the data service to the network is realized.
In one embodiment of the present disclosure, the method further comprises:
and when the topology connection state cannot be maintained, carrying out network state judgment and connection construction again.
In one embodiment of the present disclosure, the scenario in which the topology connection state cannot be maintained includes at least one of the following scenarios:
the network intensity of the 1 st-hop GO is lower than a first threshold, the network intensity of the non-1 st-hop GO is higher than a second threshold, the WiFi signal intensity between the non-1 st-hop GO and the last-hop GO is lower than a third threshold, the network connection fails, and the number of GO terminal connections is larger than a fourth threshold.
According to another aspect of the present disclosure, there is provided a multi-hop networking device, applied to a first terminal, the device including:
the information acquisition module is used for carrying out equipment discovery and service discovery according to the identity of the P2P terminal to acquire service information of the adjacent cell WiFi direct connection group manager GO;
the target selection module is used for selecting a target GO as a previous hop according to the GO service information;
the access module is used for accessing the target GO in a traditional client LC mode;
and the building module is used for building the P2P composition into GO based on WiFi direct connection.
According to still another aspect of the present disclosure, there is provided an electronic apparatus including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the multi-hop networking method described above via execution of the executable instructions.
According to yet another aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the multi-hop networking method described above.
According to the multi-hop networking method provided by the embodiment of the disclosure, a first terminal performs equipment discovery and service discovery according to the identity of a P2P terminal, and acquires service information of a neighbor WiFi direct-connection group manager GO; and then selecting the target GO as the last hop according to the GO service information, accessing the GO of the last hop, and establishing a P2P composition as the GO based on WiFi direct connection. According to the embodiment of the application, each terminal in the multi-hop network is used as the GO of one P2P group, so that the flexible expansion and dynamic adjustment of the network are facilitated.
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 accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 is a schematic flow diagram of a multi-hop networking method in an embodiment of the disclosure;
fig. 2 is a schematic flow diagram of another multi-hop networking method according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a target GO selection process in an embodiment of the disclosure;
fig. 4 is a schematic flow diagram of yet another multi-hop networking method according to an embodiment of the disclosure;
fig. 5 is a schematic flow chart of another multi-hop networking method according to an embodiment of the disclosure;
fig. 6 illustrates a schematic diagram of a multi-hop networking device in an embodiment of the disclosure;
fig. 7 shows a block diagram of a computer device in an embodiment of the disclosure.
Detailed Description
Example 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 example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software or in one or more hardware modules or integrated circuits or in different networks and/or processor devices and/or microcontroller devices.
In the 5G communication system, the intelligent terminal is widely used, and the wireless communication demand is rapidly increasing. However, the communication of the terminal depends on network infrastructure, such as WiFi APs and cellular base stations. Terminal communication can suffer from bottlenecks when infrastructure fails due to hot spot areas (e.g., stadiums, concerts), coverage blind spots (mountainous areas, suburban areas), or natural disasters. This has prompted the development of local communication systems for D2D communications, such as bluetooth and WiFi Direct. Compared with Bluetooth, wiFi Direct has better network coverage and data transmission rate. Therefore, in order to further solve the difficult problem of bandwidth limitation, the communication of the auxiliary terminal device in the network-free state can be considered to realize the construction of the local network based on the WiFi Direct.
The inventor discovers that under the WiFi Direct mechanism, each node performs equipment discovery and service discovery according to the identity of the P2P terminal, then determines that the role of the node is GO (Group Owner) or GC (Group Client) through terminal negotiation, and completes the construction of the P2P group. And then other terminals can access with the identities of GC or LC (Legacy Client), so that the data transmission of the terminals in the group in a short distance is realized.
However, the original WiFi Direct is only used for intra-group communication, and multi-hop connection of inter-group devices is often more needed to be realized in a large-scale scene. In recent years, a certain research result is available in the aspect of multi-hop networking based on WiFi Direct, but each terminal still needs to be negotiated into GO and GC, so that the network topology is not flexible enough and the range is not wide enough. In addition, the existing research only considers the intercommunication among the terminals, does not realize the distributed routing when each terminal transmits/requests data service to a base station and the like, does not consider how to support the events of network state change, user access, movement, departure and the like, and lacks a local communication network with comprehensive functions and flexible deployment.
Based on the findings of the inventors, the present disclosure provides a multi-hop networking method, apparatus, device and storage medium, which at least can solve the problems of poor multi-hop connection effect and inflexible expansion of inter-group devices in the related art.
The present exemplary embodiment will be described in detail below with reference to the accompanying drawings and examples.
Firstly, in the embodiment of the present disclosure, a multi-hop networking method is provided, where the method is applied to a first terminal, and the first terminal may be any electronic device with computing processing capability.
As an example, the execution body of the multi-hop networking method may be at least one of a mobile phone, a tablet computer, a wearable device, and the like, which can be configured to execute the multi-hop networking method provided by the embodiment of the present disclosure, or the execution body of the method may also be a client itself capable of executing the method.
Fig. 1 shows a flowchart of a multi-hop networking method in an embodiment of the present disclosure, and as shown in fig. 1, the multi-hop networking method provided in the embodiment of the present disclosure includes the following steps:
s102, performing device discovery and service discovery by using the identity of a P2P terminal to acquire service information of a neighbor WiFi direct connection group manager GO;
s104, selecting a target GO as a previous hop according to the GO service information;
s106, accessing the target GO in a traditional client LC (Legacy Client) mode;
s108, establishing the P2P composition as GO based on WiFi direct connection.
In the above steps, S106 may be performed first and then S108 may be performed, or S108 may be performed first and then S106 may be performed. The specific order of execution of the steps is not intended to be limiting. According to the multi-hop networking method provided by the embodiment of the disclosure, each terminal in the multi-hop network is used as the GO of one P2P group, so that flexible expansion and dynamic adjustment of the network are facilitated. The terminal directly accessing to the cellular/WiFi network is the 1 st-hop GO, i.e. the gateway GO, and other goes access to other groups in an LC manner, and may transmit/request data service to the network through the connection link.
The following describes the above steps in detail, as follows:
the WiFi Direct (WiFi Direct) standard refers to allowing devices in a wireless network to connect to each other without passing through a wireless router. The wireless devices supporting WiFi in the standard are interconnected in a point-to-point mode like Bluetooth, compared with Bluetooth, the wireless devices supporting WiFi in the standard are greatly improved in transmission speed and transmission distance, and power consumption is higher than that of Bluetooth.
WiFi direct connection is a point-to-point connection technology, which can directly establish tcp/ip link between two stations without participation of AP; one of the stations acts as an AP in the traditional sense, called a Group Owner (GO), and the other station is called a Group Client (GC), connected to the GO like an AP. GO and GC can be one-to-one as well as one-to-many. WiFi direct and legacy WiFi technologies are not mutually exclusive: GO can serve several GCs like AP; it can be connected to some AP at the same time as a conventional station; it may also itself be an AP.
In some embodiments, before performing device discovery and service discovery with the identity of the P2P terminal and acquiring service information of the neighboring WiFi direct group administrator GO, the method further includes:
And determining whether to be a 1 st hop node according to network information, wherein the network information comprises the network connection state and the network signal strength of the first terminal.
The terminal capable of connecting with the network decides whether to be used as a 1 st hop node, namely a gateway node according to the network information of the terminal, the terminal used as the gateway node does not carry out GO negotiation, is directly built based on WiFi Direct, marks the terminal as GO, and allows other terminals to access.
That is, when the first terminal is the 1 st hop node, the P2P group is established as GO based on WiFi direct connection;
and when the first terminal cannot be used as the 1 st hop node, performing equipment discovery and service discovery by using the identity of the P2P terminal, and acquiring service information of the neighbor WiFi direct connection group manager GO.
The network in the "network information" may be a cellular network or a wifi network, and the disclosure is not limited to the type of the network.
In the embodiment of the disclosure, the terminal is directly and self-built into GO, and accesses other groups by LC identity. The method can simplify the negotiation and grouping process of each terminal, any terminal in the network can be accessed to other groups or other terminals, and the network architecture is more flexible.
The first terminal performs equipment discovery and service discovery according to the identity of the P2P terminal, and acquires service information of a neighbor GO; the terminal takes the received GO service information as a basis of a routing decision, and selects proper GO as a previous hop; and accessing the last hop GO in an LC mode, and directly constructing the GO based on WiFi Direct without performing GO negotiation, recording the hop count as the last hop +1, and allowing other terminals to access.
Terminals acting as GO continuously broadcast Beacon frames (beacons) to announce the existence of this group, respond to device discovery and service discovery requests of other P2P terminals, and carry GO service information in service discovery responses.
In some embodiments, as shown in fig. 2, the method may further include the following steps, on the basis of the embodiment shown in fig. 1:
s210, the second terminal sends a device discovery and service discovery request;
s212, responding to the equipment discovery and service discovery request of the second terminal, and sending a service discovery response, wherein the service discovery response carries GO service information;
s214, the second terminal determines whether to select the first terminal as the target GO based on the GO service information.
The above-mentioned process of performing device discovery and service discovery in S210 and S212 is similar to the process of performing device discovery and service discovery by the first terminal in S102 with the identity of the P2P terminal, and obtaining the service information of the neighboring WiFi direct group administrator GO.
As an example, performing device discovery and service discovery with the identity of the P2P terminal, and obtaining service information of the neighboring WiFi direct group administrator GO may be specifically implemented as follows:
scanning on 1/6/11 channels according to the identity of the P2P terminal, and sending a Probe Request frame on each channel to perform device discovery;
If a Probe Response frame of a GO Response or a Beacon frame of a GO periodic broadcast is received in a channel, entering a service discovery process, and sending a service discovery request SD query, so that a neighbor cell WiFi direct connection group manager GO responds to the SD query, replying to the SD Response, wherein the SD Response comprises service information of the neighbor cell GO.
In some embodiments, the service information of the GO may include GO state information, SSID and password of the GO, the GO state information including, but not limited to, at least one of the following information:
hop count, power, connection count.
In some embodiments, when the GO is hop 1, the service information of the GO further includes network signal strength; when GO is not hop 1, the service information of GO also includes delay to the base station.
Correspondingly, in the step, the target GO is accessed in an LC mode, and the target GO can be accessed in an LC role through the SSID and the password in the GO service information.
In the above embodiment, according to the GO service information, the target GO is selected as the last hop, which may be that the terminal weights the service information of the found GO one by one, so as to implement characterization of the GO performance, and preferentially select the last hop G0.
In some embodiments, as shown in fig. 3, selecting the target GO may include the steps of:
S302, calculating a performance weighting value of the GO by weighting a plurality of parameters in the acquired GO information;
s304, when the performance weighted value of the GO with the largest performance weighted value is larger than the preset performance threshold, selecting the GO with the largest performance weighted value as the target GO as the last hop.
The GO service information in the above embodiments may include, but is not limited to, the following parameters:
terminal connection number, hop count, electric quantity, network signal strength and time delay.
The network signal strength may be cellular signal strength of GO, or may be WiFi signal strength of GO connection.
As one example, the calculation formula of the performance weighting value of GO is as follows:
wherein W (i) represents a performance weighted value of GO, N (i) represents a terminal connection number, h (i) represents a hop count, P (i) represents an electric quantity, sc (i) represents a GO network signal strength, sw (i) represents a WiFi signal strength, t (i) represents a time delay, and N th Represents a threshold value of the number of connections,M th representing the threshold of hop count, T th Represents a time delay threshold, ω 1 、ω 2 、ω 3 、ω 4 、ω 5 And the weight of the parameters is represented, and the WiFi signal strength is measured when the first terminal discovers the neighbor GO.
In some embodiments, after each terminal accesses the last-hop GO, the overall network topology construction and routing can be completed, and the transmission/request of the data service to the network can be realized.
As shown in fig. 4, on the basis of the embodiment of fig. 1, the method may further include:
s410, the whole network topology construction and the route selection are completed, and the transmission/request of the data service to the network is realized.
In some embodiments, when the topology connection state cannot be maintained, the P2P group is broken up, and the network state judgment and connection construction are performed again.
If the topology connection state cannot be maintained due to sudden events (network state change, user access, movement, departure, etc.), the terminal can carry out network state judgment and connection construction again, so as to realize self-adaptive dynamic adjustment of the network.
In some embodiments, scenarios in which the topology connection state cannot be maintained may include, but are not limited to, at least one of the following scenarios:
the network intensity of the 1 st-hop GO is lower than a first threshold, the network intensity of the non-1 st-hop GO is higher than a second threshold, the WiFi signal intensity between the non-1 st-hop GO and the last-hop GO is lower than a third threshold, the network connection fails, and the number of GO terminal connections is larger than a fourth threshold.
Here, the first threshold value and the second threshold value may be the same or different, and are not limited herein.
When the network topology is constructed, each terminal may transmit/request data traffic to the cellular base station. In addition, for the situation that the topology connection state cannot be maintained due to the occurrence of an emergency under the dynamic network, the terminal can automatically break up the group and carry out network state judgment and connection construction again, so that the self-adaptive dynamic adjustment of the network is realized.
As an example, if the cellular strength of the gateway GO is below the threshold, it is considered that it cannot continue to function as the gateway GO, the group is deleted, and the step of determining whether to act as a 1 st hop node according to the network information is skipped.
As another example, if the cellular strength of the non-gateway GO is above a threshold, it is considered to act as a gateway GO, the connection with the upper-hop GO is broken, the gateway GO is marked as such, and the connected lower-level terminal is not affected.
As yet another example, if the WiFi signal strength between the non-gateway GO and the last hop GO is below a threshold, it is considered that it cannot maintain the connection, then the group is deleted, and the step of determining whether to act as a 1 st hop node based on the network information is skipped to the above.
As yet another example, to confirm the network connection status, GO periodically sends ping packets, if 3 consecutive pings are failed, then delete the group, jump to the step of deciding whether to be the 1 st hop node based on the network information in the above.
As yet another example, if the GO terminal connection number is saturated (exceeds a set threshold), the GO considers it difficult to support data transmission for more terminal devices, and the GO denies access to other terminals until there are terminals away.
According to the multi-hop networking method provided by the embodiment of the disclosure, the routing problem of transmission/request data service of each terminal under a distributed network is solved by considering the terminal performance and the events such as network change, user access, movement, departure and the like, the user experience of each terminal is ensured, and a local communication network with comprehensive functions and flexible networking is constructed.
The following describes in detail, with reference to fig. 5, a multi-hop networking method provided in an embodiment of the present disclosure, as shown in fig. 5, taking as an example, transmitting/requesting a data service to a cellular network, the method includes the following steps:
s501, each terminal collects own cellular information;
here, the cellular information includes a cellular connection state and a cellular signal strength.
S502, judging whether the cellular signal strength is higher than a preset threshold value;
if the cellular signal strength is higher than the threshold, it is determined that the cellular signal strength can be used as a gateway node, S503 is executed to construct a group based on WiFi Direct, and the cellular signal strength is directly marked as a gateway GO, the number of hops is recorded to be 1, S504 continuously broadcasts Beacon frames, and simultaneously responds to device discovery and service discovery requests of other P2P terminals, and carries own state information in the service discovery response.
If the cellular signal strength is not higher than the threshold, judging that the cellular signal strength cannot act as a gateway node, and executing the equipment discovery and service discovery process, wherein the specific flow is as follows:
s505, the terminal scans on 1/6/11 channels according to the identity of the P2P terminal, and sends a Probe Request frame on each channel to perform device discovery; s506, if a Probe Response frame of GO Response or a Beacon frame of GO periodic broadcast is received in a certain channel, entering a service discovery process, otherwise, retransmitting a Probe Request frame;
S507, sending a service discovery request SD query in the service discovery process, and obtaining service information of the GO from the SD Response replied by the GO, wherein the service information comprises state information of the GO, SSID and password of the GO, and the state information of the GO comprises hop count, electric quantity, connection count, cellular signal strength (1 st hop) or time delay to a base station (not 1 st hop) and the like.
S508, the performance weighting value of the GO is calculated by weighting the obtained GO hop count, electric quantity, connection count, cellular strength/time delay and the WiFi signal strength obtained by measuring the cell strength/time delay. The calculation formula of the weighting value may employ the formula (1) above.
S509, selecting GO with the optimal performance weighting value as the last hop. And the self-jump number is recorded as the last jump plus 1; s510, building a group based on WiFi Direct, directly setting the group as GO, and accessing the last-hop GO in an LC role through SSID and password to finish routing; s511 continuously broadcasts Beacon frames while responding to device discovery and service discovery requests of other P2P terminals, and carries own service information in the service discovery response.
If the neighbor cell does not have the GO suitable for access, the terminal continues to perform device discovery and service discovery, and goes to S505.
When the network topology is constructed, each terminal may transmit/request data traffic to the cellular base station. In addition, for the situation that the topology connection state cannot be maintained due to the occurrence of an emergency under the dynamic network, the terminal can carry out network state judgment and connection construction again, so as to realize self-adaptive dynamic adjustment of the network. The method comprises the following steps:
(1) If the cellular strength of the gateway GO is lower than the threshold value, the gateway GO cannot be considered to continue to act as the gateway GO, deleting the group, and jumping to the step of determining whether to act as a 1 st-hop node according to the network information;
(2) If the cellular strength of the non-gateway GO is higher than the threshold value, the non-gateway GO is considered to be capable of functioning as the gateway GO, the connection with the uplink GO is disconnected, the self is marked as the gateway GO, and the connected lower terminal is not affected;
(3) If the WiFi signal intensity between the non-gateway GO and the last hop GO is lower than the threshold value, deleting the group, and jumping to the step of determining whether to be a 1 st hop node according to the network information;
(4) In order to confirm the network connection state, the GO periodically sends ping packets, if the continuous 3 times of ping are not communicated, the network connection is considered to be failed, the group is deleted, and the step of determining whether to be a 1 st hop node according to the state network information is skipped to the above;
(5) If the connection number of the GO terminal is saturated (exceeds a set threshold), the GO is considered to be difficult to support data transmission of more terminal devices, and the GO refuses other terminals to access until the terminals leave;
according to the embodiment of the disclosure, terminals are divided according to network connection states, and based on the proposed networking mechanism and by using terminal state information acquired in service discovery, a local communication network is constructed by selecting a proper path on the basis of considering the events of terminal transmission requirements, network changes, user access, movement, departure and the like, so that the problem of multi-hop forwarding of data under a distributed network is solved.
Based on the same inventive concept, the embodiments of the present disclosure also provide a multi-hop networking device, as described in the following embodiments. Since the principle of solving the problem of the embodiment of the device is similar to that of the embodiment of the method, the implementation of the embodiment of the device can be referred to the implementation of the embodiment of the method, and the repetition is omitted.
Fig. 6 shows a schematic diagram of a multi-hop networking device according to an embodiment of the disclosure, which is applied to a first terminal, as shown in fig. 6, the multi-hop networking device 600 includes:
the information obtaining module 602 is configured to perform device discovery and service discovery according to the identity of the P2P terminal, and obtain service information of the neighboring WiFi direct group administrator GO;
a target selection module 604, configured to select a target GO as a previous hop according to the GO service information;
an access module 606, configured to access the target GO in a conventional client LC manner;
a grouping module 608, configured to establish a P2P group to GO based on WiFi direct connection; .
In some embodiments, the multi-hop networking device 600 may further include:
the information judging module is used for determining whether to be used as a 1 st hop node according to network information, wherein the network information comprises the network connection state and the network signal strength of the first terminal;
Correspondingly, the information obtaining module 602 may be specifically configured to perform device discovery and service discovery according to the identity of the P2P terminal when the first terminal cannot be used as the 1 st hop node, and obtain service information of the neighboring WiFi direct group administrator GO.
In some embodiments, the multi-hop networking device 600 may further include:
and the second grouping module is used for establishing the P2P group to be GO based on WiFi direct connection when the first terminal is the 1 st hop node.
The second building block may be the same building block 608 or may be a different building block.
In some embodiments, the multi-hop networking device 600 may further include:
a request receiving module, configured to receive a device discovery and service discovery request of a second terminal;
and the service response module is used for responding to the equipment discovery and service discovery request of the second terminal and sending a service discovery response, wherein the service discovery response carries GO service information, so that the second terminal judges whether to select the first terminal as a target GO or not based on the GO service information.
In some embodiments, the target selection module 604 may be implemented as follows:
calculating a performance weighting value of the GO by weighting a plurality of parameters in the acquired GO information;
And when the performance weighted value of the GO with the maximum performance weighted value is larger than a preset performance threshold, selecting the GO with the maximum performance weighted value as the target GO as the last hop.
In some embodiments, the GO service information includes GO state information, SSID and password of GO, GO state information including, but not limited to, at least one of the following parameters:
terminal connection number, hop count, electric quantity, network signal strength, time delay, SSID of GO and password.
In some embodiments, the calculation formula for the performance weighting value of GO is as follows:
wherein W (i) represents a performance weighted value of GO, N (i) represents a terminal connection number, h (i) represents a hop count, P (i) represents an electric quantity, sc (i) represents a GO network signal strength, sw (i) represents a WiFi signal strength, t (i) represents a time delay, and N th Represents a threshold of the number of connections, M th Representing the threshold of hop count, T th Represents a time delay threshold, ω 1 、ω 2 、ω 3 、ω 4 、ω 5 Representing the weights of the parameters.
In some embodiments, the information acquisition module 602 may be implemented as follows:
scanning on 1/6/11 channels according to the identity of the P2P terminal, and sending a Probe Request frame on each channel to perform device discovery;
if a Probe Response frame of a GO Response or a Beacon frame of a GO periodic broadcast is received in a channel, entering a service discovery process, and sending a service discovery request SD query, so that a neighbor cell WiFi direct connection group manager GO responds to the SD query, replying to the SD Response, wherein the SD Response comprises service information of the neighbor cell GO.
In some embodiments, the access module 606 may be specifically configured to:
and accessing the target GO in the LC role through the SSID and the password in the GO service information.
In some embodiments, the multi-hop networking device 600 may further include:
and the topology construction module is used for completing the overall network topology construction and routing selection and realizing the transmission/request of the data service to the network.
In some embodiments, the topology construction module may also be configured to:
and when the topology connection state cannot be maintained, the P2P group is disassembled, and network state judgment and connection construction are carried out again.
In some embodiments, the scenario in which the topology connection state cannot be maintained includes at least one of the following scenarios:
the cell strength of the 1 st-hop GO is lower than a first threshold, the cell strength of the non-1 st-hop GO is higher than a second threshold, the WiFi signal strength between the non-1 st-hop GO and the last-hop GO is lower than a third threshold, the network connection fails, and the number of GO terminal connections is larger than a fourth threshold.
Here, the first threshold value and the second threshold value may be the same or different, and are not limited herein.
The multi-hop networking device provided by the embodiment of the application can be used for executing the multi-hop networking method provided by the embodiments of the methods, and the implementation principle and the technical effect are similar, so that the description is omitted herein for the sake of brevity.
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 700 according to such an embodiment of the present disclosure is described below with reference to fig. 7. The electronic device 700 shown in fig. 7 is merely an example and should not be construed to limit the functionality and scope of use of embodiments of the present disclosure in any way.
As shown in fig. 7, the electronic device 700 is embodied in the form of a general purpose computing device. Components of electronic device 700 may include, but are not limited to: the at least one processing unit 710, the at least one memory unit 720, and a bus 730 connecting the different system components, including the memory unit 720 and the processing unit 710.
Wherein the storage unit stores program code that is executable by the processing unit 710 such that the processing unit 710 performs steps according to various exemplary embodiments of the present disclosure described in the above-described "exemplary methods" section of the present specification. For example, the processing unit 710 may perform the following steps of the method embodiment described above:
Performing device discovery and service discovery by using the identity of the P2P terminal to acquire service information of the neighbor WiFi direct connection group manager GO;
selecting a target GO as a previous hop according to the GO service information;
accessing a target GO in a traditional client LC mode;
P2P composition is established to be GO based on WiFi direct connection; .
The memory unit 720 may include readable media in the form of volatile memory units, such as Random Access Memory (RAM) 7201 and/or cache memory 7202, and may further include Read Only Memory (ROM) 7203.
The storage unit 720 may also include a program/utility 7204 having a set (at least one) of program modules 7205, such program modules 7205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment.
Bus 730 may be a 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 local bus using any of a variety of bus architectures.
The electronic device 700 may also communicate with one or more external devices 740 (e.g., keyboard, pointing device, bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 700, and/or any device (e.g., router, modem, etc.) that enables the electronic device 700 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 750.
Also, electronic device 700 may 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 760.
As shown in fig. 7, network adapter 760 communicates with other modules of electronic device 700 over bus 730.
It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with electronic device 700, 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 may be implemented in software 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, including 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.
In an exemplary embodiment of the present disclosure, a computer-readable storage medium, which may be a readable signal medium or a readable storage medium, is also provided. On which a program product is stored which enables the implementation of the method described above of the present disclosure.
In some possible implementations, various aspects of the 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.
More specific examples of the computer readable storage medium in the present disclosure may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
In this disclosure, a computer readable storage 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.
In some examples, program code embodied on a computer readable storage 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.
In particular implementations, the 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).
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a 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, although the steps of the methods in the present disclosure are depicted in a particular order in the drawings, this does not require or imply that the steps must be performed in that particular order or that all illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.
From the description of the above embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software 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, including several instructions to cause a computing device (may be a personal computer, a server, a mobile terminal, or a network device, etc.) to perform the method according to the embodiments of the present disclosure.
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 (14)

1. A multi-hop networking method, applied to a first terminal, the method comprising:
performing device discovery and service discovery by using the identity of the P2P terminal to acquire service information of the neighbor WiFi direct connection group manager GO;
selecting a target GO as a previous hop according to the GO service information;
accessing the target GO in a traditional client LC mode;
P2P composition is established to be GO based on WiFi direct connection;
before the device discovery and service discovery are performed by using the identity of the P2P terminal to obtain the service information of the neighboring WiFi direct group administrator GO, the method further includes:
determining whether to be a 1 st hop node according to network information, wherein the network information comprises a network connection state and network signal strength of a first terminal;
the step of performing device discovery and service discovery by using the identity of the P2P terminal to obtain service information of the neighbor WiFi direct group administrator GO includes:
and when the first terminal cannot be used as the 1 st hop node, performing equipment discovery and service discovery by using the identity of the P2P terminal, and acquiring service information of the neighbor WiFi direct connection group manager GO.
2. The method according to claim 1, wherein the method further comprises:
and when the first terminal is the 1 st hop node, establishing a P2P composition to be GO based on WiFi direct connection.
3. The method according to claim 1, wherein the method further comprises:
receiving a device discovery and service discovery request of a second terminal;
and responding to the equipment discovery and service discovery request of the second terminal, and sending a service discovery response, wherein the service discovery response carries GO service information, so that the second terminal judges whether to select the first terminal as a target GO based on the GO service information.
4. The method of claim 1, wherein the selecting the target GO as the last hop according to the GO service information comprises:
calculating a performance weighting value of the GO by weighting a plurality of parameters in the acquired GO service information;
and when the performance weighted value of the GO with the maximum performance weighted value is larger than a preset performance threshold, selecting the GO with the maximum performance weighted value as a target GO as the last hop.
5. The method of claim 4, wherein the GO service information comprises GO status information, an SSID of GO, and a password, the GO status information comprising at least one of the following parameters:
terminal connection number, hop count, electric quantity, network signal strength and time delay.
6. The method of claim 5, wherein the performance weighting value for GO is calculated as follows:
If N (i) is not less than N th Or h (i) is greater than or equal to M th Or T (i) is not less than T th W (i) =0
If h (i) =1, then
Otherwise the first set of parameters is selected,
wherein W (i) represents a performance weighted value of GO, N (i) represents a terminal connection number, h (i) represents a hop count, P (i) represents an electric quantity, sc (i) represents a GO network signal strength, sw (i) represents a WiFi signal strength, t (i) represents a time delay, and N th Represents a threshold of the number of connections, M th Representing the threshold of hop count, T th Represents a time delay threshold, ω 1 、ω 2 、ω 3 、ω 4 、ω 5 And the weight of the parameters is represented, and the WiFi signal strength is measured when the first terminal discovers the neighbor GO.
7. The method of claim 1, wherein the performing device discovery and service discovery with the identity of the P2P terminal to obtain service information of the neighboring WiFi direct group manager GO comprises:
scanning on 1/6/11 channels according to the identity of the P2P terminal, and sending a Probe Request frame on each channel to perform device discovery;
if a Probe Response frame of a GO Response or a Beacon frame of a GO periodic broadcast is received in a channel, entering a service discovery process, and sending a service discovery request SD query, so that a neighbor WiFi direct-connected group manager GO responds to the SD query to reply to the SD Response, wherein the SD Response comprises service information of the neighbor GO.
8. The method of claim 1, wherein the accessing the target GO in a legacy client LC manner comprises:
and accessing the target GO in an LC role through the SSID and the password in the GO service information.
9. The method according to claim 1, wherein the method further comprises:
and the overall network topology construction and the routing selection are completed, and the transmission/request of the data service to the network is realized.
10. The method according to claim 9, wherein the method further comprises:
and when the topology connection state cannot be maintained, carrying out network state judgment and connection construction again.
11. The method of claim 10, wherein the scenario in which the topology connection state cannot be maintained comprises at least one of:
the network intensity of the 1 st-hop GO is lower than a first threshold, the network intensity of the non-1 st-hop GO is higher than a second threshold, the WiFi signal intensity between the non-1 st-hop GO and the last-hop GO is lower than a third threshold, the network connection fails, and the number of GO terminal connections is larger than a fourth threshold.
12. A multi-hop networking device, for use in a first terminal, the device comprising:
the information acquisition module is used for carrying out equipment discovery and service discovery according to the identity of the P2P terminal to acquire service information of the adjacent cell WiFi direct connection group manager GO;
The target selection module is used for selecting a target GO as a previous hop according to the GO service information;
the access module is used for accessing the target GO in a traditional client LC mode;
the building module is used for building a P2P (peer-to-peer) composition into GO based on WiFi direct connection;
the multi-hop networking device further comprises an information judging module, wherein the information judging module is used for judging whether to be used as a 1 st hop node according to network information, and the network information comprises a network connection state and network signal strength of the first terminal;
the information acquisition module is used for carrying out equipment discovery and service discovery according to the identity of the P2P terminal when the first terminal cannot be used as the 1 st hop node, and acquiring service information of the neighbor WiFi direct connection group manager GO.
13. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the multi-hop networking method of any of claims 1-11 via execution of the executable instructions.
14. A computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the multi-hop networking method of any of claims 1-11.
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