CN106375100B - Method of realizing group broadcasting and device in a kind of video monitoring system - Google Patents

Abstract

The invention discloses a method and device for implementing multicast in a video monitoring system, which are applied to a video management server. Front-end equipment in the same network segment in the video monitoring system share the same IP address. The method for implementing multicast receives Configure information, join the signaling multicast group of the front-end equipment, and receive the registration message sent by the front-end equipment through the signaling multicast group, and record the signaling multicast group and the media stream multicast group of the front-end equipment; Therefore, according to the front-end device ID in the media stream request message, the corresponding signaling multicast group and media stream multicast group are notified to the client, and the client is notified to join the signaling multicast group and media stream multicast group. The device of the invention includes a configuration module, a registration module and a multicast management module. The method and device of the present invention realize the multicasting of the front-end equipment with the same IP address, improve the utilization rate of the IP address, and facilitate the deployment of the IP address.

Description

Method and device for implementing multicast in video surveillance system

technical field

The invention belongs to the technical field of video monitoring, in particular to a method and device for realizing multicast in a video monitoring system.

Background technique

The classic PIM Sparse-Mode (PIM-SM) is a unidirectional tree forwarding. The initial multicast traffic is sent from the source to the RP, and then the RP uses the shared tree to forward it to the receiver; if the RP is not on the shortest path tree, automatic The calculation of the shortest path tree from the source to the receiver, and then generate the source tree routing entries (S, G); such behavior may cause the router to maintain more source tree routing entries (S, G), resulting in certain system and occupancy of network resources.

Bidirectional PIM (Bidir-PIM), that is, bidirectional PIM is a branch and extension technology of PIM-SM, which can optimize the resource occupation problem caused by the unidirectional tree of PIM-SM. In the Bidir-PIM mode of operation, there is no need to create any source tree entries (S, G), and all multicast traffic is forwarded using the shared tree. In this mode, there is no source registration message, and both the multicast source and the receiver join to the same shared tree. Bidir-PIM is especially suitable for applications with many multicast sources and receiving clients, such as multi-party video conference calls. In the Bidir-PIM protocol, the service flow of the multicast source is unconditionally forwarded to the RP, and then the RP forwards it to multiple clients. It does not require the source registration process, and saves the resource consumption of routing equipment for source state management of a large number of multicast sources. In the Bidir-PIM protocol domain, there are only (*, G) entries, and no (S, G) entries are needed, so the resource consumption caused by the maintenance of multicast forwarding entries of the device is greatly reduced.

However, in the two-way PIM-based video surveillance system, due to the large number of front-end devices, when adding video surveillance devices to the live network, it will be more troublesome to deploy IP addresses. There may be insufficient IP addresses, or address conflicts during deployment may affect services. .

Contents of the invention

The purpose of the present invention is to provide a method and device for implementing multicast in a video monitoring system, which is applied in a video monitoring system based on two-way PIM, and solves the problem that there are many front-end equipment, and there may be insufficient IP addresses, or address conflicts during deployment affect the business issues.

In order to achieve the above object, the technical scheme of the present invention is as follows:

A method for implementing multicast in a video surveillance system, applied to a video management server, where front-end devices on the same network segment in the video surveillance system share the same IP address, configure the ID information of the video management server corresponding to the front-end device, And the corresponding signaling multicast group and media stream multicast group, the front-end equipment joins the signaling multicast group and the media stream multicast group after starting, and the method for implementing multicast in the video surveillance system includes:

receiving configuration information, and joining the signaling multicast group of the front-end equipment;

receiving a registration message sent by the front-end device through the signaling multicast group, and recording the signaling multicast group and the media stream multicast group of the front-end device;

Receive the client's media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify the client to join the signaling multicast group and media stream multicast group.

Further, the multicast implementation method in the video monitoring system also includes:

Receive the message that the client releases the media stream through the signaling multicast group, and respond through the signaling multicast group, so that the client sends a leave message to leave the corresponding media stream multicast group after receiving the response.

Further, the multicast implementation method in the video monitoring system also includes:

Notifying the members of the signaling multicast group of the front-end device requested by the client and the corresponding media stream multicast group.

The front-end devices in the same network segment sharing the same IP address in the present invention means that the front-end devices in the same two-layer network share the same IP address.

The signaling multicast groups of the front-end devices sharing the same IP address are the same, and the front-end devices sharing the same IP address have their own independent media stream multicast groups.

The present invention also proposes a device for implementing multicast in a video surveillance system, which is applied to a video management server. The front-end equipment on the same network segment in the video surveillance system shares the same IP address, and the front-end equipment is configured with a corresponding video ID information of the management server, and the corresponding signaling multicast group and media stream multicast group. Devices include:

A configuration module, configured to receive configuration information and join the signaling multicast group of the front-end device;

A registration module, configured to receive a registration message sent by the front-end device through the signaling multicast group, and record the signaling multicast group and the media stream multicast group of the front-end device;

The multicast management module is used to receive the client media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify the client to join the message Make multicast group and media stream multicast group.

Further, the multicast management module is also used for:

Receive the message that the client releases the media stream through the signaling multicast group, and respond through the signaling multicast group, so that the client sends a leave message to leave the corresponding media stream multicast group after receiving the response.

Further, the multicast management module is also used for:

Notifying the members of the signaling multicast group of the front-end device requested by the client and the corresponding media stream multicast group.

The present invention proposes a method and device for implementing multicast in a video surveillance system. The IPCs in a network segment share the same IP address to access the video surveillance network, and the two-way PIM-based multicast technology is used to communicate with other devices in the video surveillance. interact. Through multicast, a batch of IPCs with the same IP address can be configured in batches. IPCs in a network segment share the same IP address, and the video surveillance business communication can be carried out in the multicast network that supports bidirectional PIM in the whole network. The method and device of the invention improve the utilization rate of the IP address, facilitate the deployment of the IP address, and at the same time realize the interaction of devices in the same multicast group.

Description of drawings

Figure 1 is a network diagram of a video surveillance system based on bidirectional PIM networking;

Fig. 2 is the flow chart of the multicast implementation method in the video surveillance system of the present invention;

Fig. 3 is a schematic structural diagram of a device for implementing multicast in the video surveillance system of the present invention.

Detailed ways

The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, and the following embodiments do not constitute a limitation of the present invention.

This embodiment takes Figure 1 as an example. The video monitoring system is based on two-way PIM networking, and the front-end equipment is divided into two groups, which are IPC group 1 with the same IP and IPC group 2 with the same IP, and the signaling multicast corresponding to IPC group 1 The group is G_sig1, and the signaling multicast group corresponding to IPC group 2 is G_sig2. The video surveillance system also includes equipment such as clients, video management servers, storage devices, and video walls.

Wherein, before the front-end equipment IPCs sharing IP addresses join the video management server, ID information of the video management server of these IPCs, ID information of the IPCs, and corresponding multicast groups need to be configured. In this embodiment, all IPCs on the same network segment share the same unicast IP address. For example, IPCs in the same layer 2 network share the same IP address, and IPCs in different layer 2 networks have different IP addresses. In this embodiment, the IPC factory defaults to disable the gratuitous ARP function to avoid ARP conflicts reported by network devices.

When configuring these IPCs, you can log in to the IPCs through a direct connection for configuration, or you can set up a multicast search tool on a PC on the same network segment as these IPCs to discover these IPCs. PCs send multicast or broadcast onvif discovery packets; these IPCs can send relevant information to PCs through unicast or multicast after receiving the multicast discovery packets. For example, the response information includes device type, MAC address, serial number, version, etc. The PC configures the IPCs through multicast packets. In the configuration, the MAC addresses are used to distinguish the IPCs, and the ID information of the video management server of these IPCs, the ID information of the IPCs, and the corresponding multicast groups are set. Since all IPCs have the same IP address, this message is sent by multicast or broadcast, and the configuration information of each IPC is distinguished by the mac address in the message body. The specific configuration is as follows:

MAC ID G_sig G_media VM_ID Mac_a Id_a G_sig1 G_m1 VM_1 Mac_b Id_b G_sig1 G_m2 VM_1

Table 1

As shown in Table 1, IPC cameras Id_a and Id_b are located in IPC group 1, and their corresponding signaling group is G_sig1, but respectively correspond to different media stream multicast groups. That is, IPCs with the same IP address share the same signaling multicast group G_sig, but each IPC has its own independent media stream multicast group, which is the value corresponding to the G_media field. After the IPC receives the configuration from the PC, it sends an IGMP join message to join the corresponding two multicast groups, and checks the configuration items when the IPC starts. If there are G_sig and G_media multicast group configurations, the IPC will start Automatically join the corresponding multicast group.

It should be noted that the signaling multicast groups corresponding to IPCs with the same IP address can be the same or different. Configuring the same signaling multicast group can save network resources. This embodiment takes the same signaling multicast group as an example. Note, while the IPCs with the same IP address have their own independent media stream multicast group in this embodiment, they can also share a multicast group in an open situation.

In this embodiment, the client also needs to log in to the video management server, and configure the video management server to join the signaling multicast group G_sig, or directly log in to the video management server for configuration. The client logs in to the video management server through the user name and password, and configures the G_sig multicast group of the video management server. As shown in Figure 1, there are two IPC groups with the same IP, and their signaling multicast group addresses are G_sig1 and G_sig2 respectively, so two multicast groups G_sig1 and G_sig2 need to be configured on the video management server. After receiving the configuration from the client, the video management server sends an IGMP message to join the multicast groups G_sig1 and G_sig2, and at the same time, there is information about the logged-in client on the video management server.

The front-end device IPC of the shared IP address of this embodiment joins the video management server, and the IPC sends the device registration message to the video management server through the G_sig group configured beforehand. The basic format of the message is as follows: (message type, recipient ID, device ID, device media group).

After the video management server judges the device registration message sent by the front-end device IPC through the recipient ID, it records the device information of the IPC into the database, and puts these IPCs into the online state, as shown in the following table:

Table 2

After the above configuration, the IPC, the client and the video management server can interact with each other to realize the multicast service in the video surveillance system.

As shown in Figure 2, a method for implementing multicast in a video surveillance system is applied to a video management server. In the video surveillance system, front-end devices on the same network segment share the same unicast IP address, and the front-end devices are configured according to the MAC address. The device distinguishes, configures the ID information of the video management server corresponding to the front-end device, and the corresponding signaling multicast group and media stream multicast group, and the front-end device joins the signaling multicast group and media stream group after starting broadcast group. The implementation method of multicast in the video surveillance system of this embodiment includes:

receiving configuration information, and joining the signaling multicast group of the front-end equipment;

Receive the registration message sent by the front-end device through the signaling multicast group, and record the signaling multicast group and media stream multicast group of the front-end device;

Receive the client's media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify it to join the signaling multicast group and media stream group broadcast group.

Specifically, the process for the client to obtain or release the media stream of the IPC with the specified ID is as follows:

In an embodiment of the present invention, the client acquires the media stream of the IPC with the specified ID. The client sends a media stream request message to the video management server, requesting the media stream of the IPC with the specified ID. The video management server receives the client media stream request message, informs the client of the corresponding signaling multicast group and media stream multicast group according to the front-end equipment ID in the media stream request message, and notifies it to join the signaling multicast group and the media stream multicast group. Media stream multicast group.

In specific implementation, the video management server can also first judge whether a user (client) has requested the media stream of the IPC, and if so, the video management server will notify the client of the G_sig multicast group and the G_media multicast group corresponding to the IPC end, and notify the client PC to join the signaling multicast group and media stream multicast group. If not, then the video management server records that the IPC of the ID has been requested for a media stream, and the video management server informs the client of the G_sig multicast group and the G_media multicast group corresponding to the IPC, and notifies the client PC to join the information stream. Make multicast group and media stream multicast group.

Similarly, when the client releases the media stream of the IPC with the specified ID, and when the client releases the live broadcast and leaves the multicast group, it sends a message through the G_sig multicast group, and the message carries the ID information of the video management server, indicating that the message is sent to the video management server. The video management server responds to the client through the G_sig multicast group, and the message carries the user's username. After the client receives the leave message and recognizes it from the username, it sends the igmp leave message to leave the G_media multicast group, which will not be repeated here.

In this embodiment, preferably, the video management server also periodically notifies the members of the signaling multicast group of the front-end equipment requested by the client and the corresponding media stream multicast group, that is, the information in the following table is notified to the signaling multicast group :

DEVICE_ID G_media requester list ID_a G_m1 User_1, User_2 ID_b G_m2 User_3,User_4

table 3

Therefore, in this way, the IPC and the client know that they can interact with each other through the shared signaling multicast group, and exchange media streams through the media stream multicast group.

For example, batch configuration, when the user (client) needs to configure the IPC in batches, the client carries the ID and configuration information of the IPC in the configuration message, and sends it to all front-end IPCs through the same G_sig multicast group, the front-end IPC reads a piece of configuration whose ID matches itself in the message. For some general configuration information, you can use public configuration items to send them uniformly, such as time synchronization and so on.

For example, for the interaction between client devices, all clients can interact through the G_sig group, or clients who order a specific IPC can interact through the G_media group to send media streams to each other.

As shown in Figure 3, corresponding to the above method, a device for implementing multicast in a video surveillance system is applied to a video management server, and the device for implementing multicast in the video surveillance system includes:

A configuration module, configured to receive configuration information and join the signaling multicast group of the front-end device;

A registration module, configured to receive a registration message sent by the front-end device through the signaling multicast group, and record the signaling multicast group and the media stream multicast group of the front-end device;

The multicast management module is used to receive the client media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify the client to join the message Make multicast group and media stream multicast group.

Corresponding to the above method, the front-end devices on the same network segment in the video surveillance system share the same IP address, and the front-end devices are configured with the ID information of the corresponding video management server, and the corresponding signaling multicast group and media stream multicast group , the front-end device joins the signaling multicast group and the media stream multicast group after startup.

Correspondingly, the multicast management module is also used for:

Receive the message that the client releases the media stream through the signaling multicast group, and respond through the signaling multicast group, so that the client sends a leave message to leave the corresponding media stream multicast group after receiving the response.

Correspondingly, the multicast management module is also used for:

Notifying the members of the signaling multicast group of the front-end device requested by the client and the corresponding media stream multicast group.

The specific implementation process of the multicast group management module during operation has been introduced in detail in the description of the above-mentioned method items, and will not be repeated here.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and changes according to the present invention. deformation, but these corresponding changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (10)

1. A method for realizing multicast in a video surveillance system, applied to a video management server, in the video surveillance system, the front-end equipment of the same network segment shares the same IP address, and it is characterized in that the video corresponding to the front-end equipment is configured ID information of the management server, and the corresponding signaling multicast group and media stream multicast group. Methods include: receiving configuration information, and joining the signaling multicast group of the front-end device; receiving a registration message sent by the front-end device through the signaling multicast group, and recording the signaling multicast group and the media stream multicast group of the front-end device; Receive the client's media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify the client to join the signaling multicast group and media stream multicast group. 2. the method for realizing multicast in the video surveillance system according to claim 1, is characterized in that, the method for realizing multicast in the video surveillance system further comprises: Receive the message that the client releases the media stream through the signaling multicast group, and respond through the signaling multicast group, so that the client sends a leave message to leave the corresponding media stream multicast group after receiving the response. 3. the method for realizing multicast in the video monitoring system according to claim 1, wherein the method for realizing multicast in the video monitoring system further comprises: Notifying the members of the signaling multicast group of the front-end device requested by the client and the corresponding media stream multicast group. 4. the multicast realization method in the video monitoring system according to claim 1 is characterized in that, the same IP address is shared by the front-end equipment of the same network segment, which means that the front-end equipment in the same two-layer network shares the same IP address. the same IP address. 5. the multicast realization method in the video monitoring system according to claim 1, is characterized in that, the signaling multicast group of the front-end equipment that shares the same IP address is the same, and the group that shares the same IP address Front-end devices have their own independent media stream multicast groups. 6. A device for implementing multicast in a video surveillance system, which is applied to a video management server, and the front-end equipment on the same network segment in the video surveillance system shares the same IP address, and it is characterized in that the front-end equipment is configured with a corresponding ID information of the video management server, and the corresponding signaling multicast group and media stream multicast group. Implementing devices include: A configuration module, configured to receive configuration information and join the signaling multicast group of the front-end device; A registration module, configured to receive a registration message sent by the front-end device through the signaling multicast group, and record the signaling multicast group and the media stream multicast group of the front-end device; The multicast management module is used to receive the client media stream request message, inform the client of the corresponding signaling multicast group and media stream multicast group according to the front-end device ID in the media stream request message, and notify the client to join the message Make multicast group and media stream multicast group. 7. the device for implementing multicast in the video surveillance system according to claim 6, wherein the multicast management module is also used for: Receive the message that the client releases the media stream through the signaling multicast group, and respond through the signaling multicast group, so that the client sends a leave message to leave the corresponding media stream multicast group after receiving the response. 8. the device for implementing multicast in the video surveillance system according to claim 6, wherein the multicast management module is also used for: Notifying the members of the signaling multicast group of the front-end device requested by the client and the corresponding media stream multicast group. 9. The device for realizing multicast in the video surveillance system according to claim 6, wherein the front-end equipment in the same network segment shares the same IP address, which means that the front-end equipment in the same two-layer network shares the same IP address. the same IP address. 10. The device for implementing multicast in the video surveillance system according to claim 6, wherein the signaling multicast groups of the front-end equipment sharing the same IP address are the same, and the signaling multicast groups of the front-end equipment sharing the same IP address Front-end devices have their own independent media stream multicast groups.