CN113596808B - NVR and IPC wireless ad hoc network method - Google Patents
NVR and IPC wireless ad hoc network method Download PDFInfo
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- CN113596808B CN113596808B CN202110858577.6A CN202110858577A CN113596808B CN 113596808 B CN113596808 B CN 113596808B CN 202110858577 A CN202110858577 A CN 202110858577A CN 113596808 B CN113596808 B CN 113596808B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides an NVR and IPC wireless ad hoc network method, which comprises the following steps of: ad hoc networking: the IPC is powered on after leaving the factory, full channel scanning is carried out in the initialization process of the wireless interface, NVR is searched, the response of the NVR informs the IPC of the MAC and the channel, then the IPC is configured into an AP mode and is set into the same channel, SSID and password are obtained from the detection request message of the NVR, and the wireless interface is switched to the STA mode to be connected with the NVR, so that the ad hoc network is completed; and (3) a step of re-networking: after the IPC and the NVR are successfully networked, when the NVR modifies the SSID, the beacon frame announces a new SSID, the IPC filters out the beacon frame sent by the NVR through the MAC address, and the new SSID of the NVR is analyzed from the beacon frame. The beneficial effects of the invention are as follows: the invention enriches the coping scene of the NVR and the IPC ad hoc network, so that the NVR can be re-networked with the IPC regardless of modification of wireless configuration.
Description
Technical Field
The invention relates to the technical field of video network application, in particular to an NVR and IPC wireless ad hoc network method.
Background
IPC (Internet Protocol Camera, webcam) is a new generation of cameras created by a combination of traditional cameras and network technology that can directly access network switching and routing equipment. The most important function of NVR (Network Video Recorder, network hard disk video recorder) is to receive the digital video code stream transmitted by the IPC device through the network, store and manage the digital video code stream, thereby realizing the advantage of the distributed architecture brought by networking.
The existing ad hoc network technology of NVR and IPC mainly transmits SSID and password to IPC through message interaction of management frame, and the IPC establishes wireless connection with NVR by using the acquired SSID and password. The management frame message interaction between the APs can only be carried out on the same channel, and the current method for ensuring the consistency of the two channels is that the AP mode channel of the IPC is fixed to be the same as NVR by leaving a factory.
The above conventional networking method has the following problems: firstly, the first networking after delivery can be successful, but before the first networking, the channels are inconsistent due to some reasons, such as the channel changed by NVR, so that the networking is unsuccessful, and the situation needs to restore the delivery setting to the NVR to re-networking; and secondly, after the network connection between the NVR and the IPC is successful, if the NVR modifies the SSID or the password, the NVR and the IPC need to be re-connected, but the IPC cannot acquire a new SSID and a new password, and then the NVR cannot be re-connected. In this case, factory setting needs to be restored to the IPC to be able to re-networking; and thirdly, in the traditional method, the SSID and the password are transmitted by the NVR in a broadcast mode, the IPC in the environment can acquire the SSID and the password to complete networking with the NVR, networking IPC cannot be selected autonomously, networking confusion easily occurs in a multi-set NVR environment, and the IPC of the first set is connected to the NVR of the second set.
Disclosure of Invention
The invention provides an NVR and IPC wireless ad hoc network method, which comprises the following steps of:
ad hoc networking: the IPC is powered on in a factory, all-channel scanning is carried out in the initialization process of the wireless interface, NVR existing in the environment is searched, the IPC responds to and informs of own MAC and the channel where the NVR is located, then the IPC is configured into an AP mode and is set into the same channel, SSID and password can be obtained from a detection request message of the NVR, and the IPC is switched into an STA mode to be connected with the NVR, so that the ad hoc network is completed.
And (3) a step of re-networking: after the IPC and the NVR are successfully networked, when the NVR modifies the SSID, a beacon frame of the NVR announces a new SSID, the IPC filters out the beacon frame sent by the NVR through the MAC address, and the new SSID of the NVR is analyzed from the beacon frame; when the NVR modifies the password, the password is updated in the private IE field of the detection response frame, the IPC which has acquired the SSID actively sends the detection request frame to the NVR, analyzes the new password from the detection response frame replied by the NVR, and reestablishes wireless connection with the NVR by using the new SSID and the password to complete the self-networking.
As a further improvement of the invention, in the self-networking step, for a plurality of sets of NVR environments, the IPC factory power-on scanning can broadcast the SN of the self, the NVR acquires the SN and the MAC address of each IPC, a pre-networking IPC information list is displayed, after the IPC is designated, a detection request frame is sent to the IPC unicast to transmit the SSID and the password, and the effect of orderly controlling the networking process is achieved.
As a further improvement of the present invention, in the step of ad hoc network, the method specifically further includes:
step 1: the IPC is powered on.
Step 2: the wireless interface performs a full channel scan, searches for NVR and broadcasts its own SN.
Step 3: and judging whether an NVR detection response is received, if so, entering the next step, otherwise, returning to the step 2.
Step 4: and resolving the MAC address and the channel from the NVR probe side response frame.
Step 5: the IPC sets the AP mode and sets the channel to be consistent with the NVR.
Step 6: the NVR sends a detection request frame, and the IPC analyzes the SSID and the password from the detection request frame sent by the NVR.
Step 7: the IPC switches to STA mode and connects the NVR using the acquired SSID and password.
Step 8: and the NVR and the IPC perform authentication association and handshake, establish wireless connection and complete the ad hoc network.
As a further improvement of the present invention, in the step 6, the private IE field of the NVR sending the probe request frame carries the SSID and the password, and two modes of sending the probe request frame by the NVR are provided, one is a timing broadcast mode, and the other is a designated unicast mode, which specifically includes the following steps:
step 60: the NVR is powered up.
Step 61: judging whether a unicast mode is designated, if so, entering a next step, otherwise, executing a step of broadcasting a detection request frame carrying an SSID and a password in a timing mode, then entering a step of waiting for an IPC to initiate a request for authentication association, and finally completing the ad hoc network.
Step 62: and displaying a pre-networking IPC list.
Step 63: waiting for the user to select IPC and issuing IPC MAC.
Step 64: if an issuing IPC MAC is detected, then the next step is entered, otherwise step 62 is returned.
Step 65: and sending a detection request frame carrying the SSID and the password to the appointed IPC unicast.
Step 66: and waiting for the IPC to initiate a request to carry out authentication association, and completing the ad hoc network.
As a further improvement of the present invention, in the step of re-ad hoc networking, when the NVR modifies the SSID and/or the password during the operation of the suite, the specific steps of re-ad hoc networking are as follows:
step S1: the NVR modifies the SSID and/or password.
Step S2: the NVR broadcasts a beacon frame announcing its new SSID.
Step S3: the IPC matches the beacon frame through the MAC address, and analyzes the new SSID of the NVR.
Step S4: the IPC sends a probe request frame to the SSID of the NVR.
Step S5: the NVR replies with a probe response frame.
Step S6: the IPC parses the new password for NVR from the probe response frame.
Step S7: and the IPC uses the new SSID and the new password to carry out authentication association and handshake with the NVR, establishes wireless connection and completes the ad hoc network.
As a further improvement of the present invention, in said step S5, the VR replies with a probe response frame, wherein the private IE field carries its own new password.
As a further improvement of the present invention, in the step of re-networking, when the IPC is in a power-off state, the NVR modifies the SSID and/or the password, and the specific steps of the re-networking after the IPC is powered on are as follows:
step one: the NVR modifies the SSID and/or password.
Step two: the NVR updates the SSID and password in the probe response frame.
Step three: the IPC is powered on to actively broadcast a detection request frame to scan NVR and wait for NVR response.
Step four: the NVR replies with a probe response frame carrying the new SSID and password of the NVR.
Step five: IPC parses the new SSID and password from the probe response frame.
Step six: and the IPC uses the latest SSID and password to carry out authentication association with the NVR, so as to complete the ad hoc network.
As a further improvement of the present invention, in the step 8, the NVR performs authentication association and four-way handshake with the IPC to establish a wireless connection; in the step S7, the IPC uses the new SSID and password to perform authentication association with the NVR and four-way handshake, and establishes a wireless connection to complete the ad hoc network.
The beneficial effects of the invention are as follows: the NVR and IPC wireless ad hoc network method enriches the coping scenes of the NVR and the IPC ad hoc network, so that the NVR can be ad hoc with the IPC anyway after modifying wireless configuration, and a mode of autonomously selecting networking members is provided.
Drawings
FIG. 1 is a flow chart of the NVR and IPC ad hoc network of the present invention;
FIG. 2 is a schematic flow chart of the NVR sending probe request frame of the present invention;
FIG. 3 is a timing diagram of the interaction of NVR and IPC ad hoc network messages according to the present invention;
FIG. 4a is a flow chart of NVR modifying SSID and password during operation of the present invention;
FIG. 4b is a diagram showing the interaction between the re-networking process and the message timing during the operation of the present invention;
FIG. 5a is a flow chart of the invention for modifying SSID and password for NVR in IPC power-down state;
fig. 5b is a timing diagram of the ad hoc network flow and message interaction of the IPC re-power up of the present invention.
Detailed Description
The invention discloses a NVR and IPC wireless ad hoc network method, wherein the NVR changes any wireless configuration (channel, SSID, password, etc.), the IPC and the NVR can complete ad hoc network again and stably, and the specific process is as follows:
ad hoc networking: the IPC is powered on in a factory, all-channel scanning is carried out in the initialization process of the wireless interface, NVR existing in the environment is searched, the IPC responds to and informs of own MAC and the channel where the NVR is located, then the IPC is configured into an AP mode and is set into the same channel, SSID and password can be obtained from a detection request message of the NVR, and the IPC is switched into an STA mode to be connected with the NVR, so that the ad hoc network is completed.
And (3) a step of re-networking: after the IPC and the NVR are successfully networked, when the NVR modifies the SSID, a beacon frame of the NVR announces a new SSID, the IPC filters out the beacon frame sent by the NVR through the MAC address, and the new SSID of the NVR is analyzed from the beacon frame; when the NVR modifies the password, the password is updated in the private IE field of the probe response frame, the IPC which has acquired the SSID actively sends the probe request frame to the NVR, and a new password is resolved from the probe response frame replied by the NVR. The wireless connection can be re-established with the NVR by using the new SSID and password, thus completing the ad hoc network.
The NVR and IPC wireless ad hoc network method further comprises the following steps: for a multi-set NVR environment, the IPC factory power-on scanning can broadcast an SN (serial number) of the IPC, the NVR acquires the SN and the MAC address of each IPC from the SN and the MAC address, a pre-networking IPC information list is displayed, after the IPC is designated, a detection request frame is sent to the IPC unicast to transmit SSID and a password, and the effect of orderly controlling the networking process is achieved.
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 3, in the step of ad hoc network, the method specifically further includes:
step 1: the IPC is powered on.
Step 2: the wireless interface performs a full channel scan, searches for NVR and broadcasts its SN (sequence number).
Step 3: and judging whether an NVR detection response is received, if so, entering the next step, otherwise, returning to the step 2.
Step 4: and resolving the MAC address and the channel from the NVR probe side response frame.
Step 5: the IPC sets the AP mode and sets the channel to be consistent with the NVR.
Step 6: the NVR sends a detection request frame, and the IPC analyzes the SSID and the password from the detection request frame sent by the NVR.
Step 7: the IPC switches to STA mode and connects the NVR using the acquired SSID and password.
Step 8: and the NVR and the IPC perform authentication association and four-way handshake, establish wireless connection and complete the ad hoc network.
As shown in fig. 2, in the step 6, the private IE field of the NVR sending the probe request frame carries the SSID and the password, and two modes of the NVR sending the probe request frame, one is a timing broadcast mode and the other is a designated unicast mode, which specifically includes the following steps:
step 60: the NVR is powered up.
Step 61: judging whether a unicast mode is designated, if so, entering a next step, otherwise, executing a step of broadcasting a detection request frame carrying an SSID and a password in a timing mode, then entering a step of waiting for an IPC to initiate a request for authentication association, and finally completing the ad hoc network.
Step 62: and displaying a pre-networking IPC list.
Step 63: waiting for the user to select IPC and issuing IPC MAC.
Step 64: if an issuing IPC MAC is detected, then the next step is entered, otherwise step 62 is returned.
Step 65: and sending a detection request frame carrying the SSID and the password to the appointed IPC unicast.
Step 66: and waiting for the IPC to initiate a request to carry out authentication association, and completing the ad hoc network.
As shown in fig. 4a and 4b, in the step of re-networking, when the NVR modifies the SSID and/or the password during the operation of the package, the specific steps of re-networking are as follows:
step S1: the NVR modifies the SSID and/or password.
Step S2: the NVR broadcasts a beacon frame announcing its new SSID.
Step S3: the IPC matches the beacon frame through the MAC address, and analyzes the new SSID of the NVR.
Step S4: the IPC sends a probe request frame to the SSID of the NVR.
Step S5: the NVR replies with a probe response frame in which the private IE field carries its new password.
Step S6: the IPC parses the new password for NVR from the probe response frame.
Step S7: and the IPC uses the new SSID and the new password to carry out authentication association and four-way handshake with the NVR, establishes wireless connection and completes the ad hoc network.
As shown in fig. 5a and 5b, in the step of re-networking, when the IPC is in a power-off state, the NVR modifies the SSID and/or the password, and the specific steps of re-networking after the IPC is powered on are as follows:
step one: the NVR modifies the SSID and/or password.
Step two: the NVR updates the SSID and password in the probe response frame.
Step three: the IPC is powered on to actively broadcast a detection request frame to scan NVR and wait for NVR response.
Step four: the NVR replies with a probe response frame carrying the new SSID and password (private IE field) of the NVR.
Step five: IPC parses the new SSID and password from the probe response frame.
Step six: and the IPC uses the latest SSID and password to carry out authentication association with the NVR, so as to complete the ad hoc network.
The invention has the beneficial effects that: the NVR and IPC wireless ad hoc network method enriches the coping scenes of the NVR and the IPC ad hoc network, so that the NVR can be ad hoc with the IPC anyway after modifying wireless configuration, and a mode of autonomously selecting networking members is provided.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The NVR and IPC wireless ad hoc network method is characterized by comprising the following steps of:
ad hoc networking: the IPC is powered on after leaving the factory, full channel scanning is carried out in the initialization process of the wireless interface, NVR existing in the environment is searched, the IPC responds to and informs of own MAC and the channel where the NVR is located, then the IPC is configured into an AP mode and is set into the same channel, SSID and password can be obtained from a detection request message of the NVR, and the IPC is switched into an STA mode to be connected with the NVR, so that the ad hoc network is completed;
and (3) a step of re-networking: after the IPC and the NVR are successfully networked, when the NVR modifies the SSID, a beacon frame of the NVR announces a new SSID, the IPC filters out the beacon frame sent by the NVR through the MAC address, and the new SSID of the NVR is analyzed from the beacon frame; when the NVR modifies the password, the password is updated in the private IE field of the detection response frame, the IPC which has acquired the SSID actively transmits the detection request frame to the NVR, analyzes the new password from the detection response frame replied by the NVR, reestablishes wireless connection with the NVR by using the new SSID and the password to complete the self-networking,
in the ad hoc network step, for a plurality of sets of NVR environments, the IPC factory power-on scanning broadcasts the SN of the IPC, the NVR acquires the SN and the MAC address of each IPC from the SNs, a pre-networking IPC information list is displayed, after the IPC is specified, a detection request frame is sent to the IPC unicast to transmit the SSID and the password, and the effect of orderly controlling the networking process is achieved.
2. The method of wireless ad hoc networking between NVR and IPC according to claim 1, wherein in the ad hoc networking step, the method further comprises:
step 1: powering up IPC;
step 2: the wireless interface scans the whole channel, searches NVR and broadcasts its own SN;
step 3: judging whether NVR detection response is received, if so, entering the next step, otherwise, returning to the step 2;
step 4: analyzing an MAC address and a channel from the NVR probe side response frame;
step 5: the IPC sets an AP mode and sets a channel to be consistent with NVR;
step 6: the NVR sends a detection request frame, and the IPC analyzes an SSID and a password from the detection request frame sent by the NVR;
step 7: the IPC is switched to the STA mode, and the acquired SSID and the password are used for connecting NVR;
step 8: and the NVR and the IPC perform authentication association and handshake, establish wireless connection and complete the ad hoc network.
3. The wireless ad hoc network method of claim 2, wherein in step 8, the NVR and the IPC perform authentication association and four-way handshake to establish a wireless connection.
4. The method of wireless ad hoc network between NVR and IPC according to claim 2, wherein in said step 6, the private IE field of the NVR transmitting probe request frame carries its SSID and password, and two modes of the NVR transmitting probe request frame are a timing broadcast mode and a designated unicast mode, and the specific steps are as follows:
step 60: NVR is powered on;
step 61: judging whether a unicast mode is designated, if so, entering a next step, otherwise, executing a step of broadcasting a detection request frame carrying an SSID and a password in a timing mode, then entering a step of waiting for an IPC to initiate a request for authentication association, and finally completing the ad hoc network;
step 62: displaying a pre-networking IPC list;
step 63: waiting for the user to select the IPC and issuing the IPC MAC;
step 64: if the IPC MAC is detected to be issued, the next step is entered, otherwise, the step 62 is returned;
step 65: transmitting a detection request frame carrying an SSID and a password to a designated IPC unicast;
step 66: and waiting for the IPC to initiate a request to carry out authentication association, and completing the ad hoc network.
5. The method of claim 1, wherein in the step of re-networking, when the NVR modifies the SSID and/or the password during the operation of the suite, the specific steps of re-networking are as follows:
step S1: the NVR modifies the SSID and/or password;
step S2: NVR broadcasts a beacon frame to announce a new SSID;
step S3: the IPC matches the beacon frame through the MAC address, and analyzes the new SSID of the NVR from the beacon frame;
step S4: IPC sends a detection request frame to SSID of NVR;
step S5: NVR replies with a probe response frame;
step S6: the IPC analyzes the new NVR password from the detection response frame;
step S7: and the IPC uses the new SSID and the new password to carry out authentication association and handshake with the NVR, establishes wireless connection and completes the ad hoc network.
6. The method of claim 5, wherein in step S5, the VR replies with a probe response frame, wherein the private IE field carries its own new password.
7. The method of claim 1, wherein in the step of re-networking, when the IPC is in a power-off state, the NVR modifies the SSID and/or the password, and the specific steps of re-networking after the IPC is powered on are as follows:
step one: the NVR modifies the SSID and/or password;
step two: the NVR updates the SSID and the password in the detection response frame;
step three: IPC is powered on to actively broadcast a detection request frame to scan NVR, and NVR response is waited;
step four: the NVR replies a detection response frame, and the frame carries a new SSID and a new password of the NVR;
step five: the IPC analyzes the new SSID and the password from the detection response frame;
step six: and the IPC uses the latest SSID and password to carry out authentication association with the NVR, so as to complete the ad hoc network.
8. The wireless ad hoc network method of claim 5, wherein in step S7, the IPC uses the new SSID and password to perform authentication association with the NVR and four-way handshake, establishes a wireless connection, and completes the ad hoc network.
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