KR101369151B1 - Network Video Recoder with a built-in L2 hub and packet routing method thereof - Google Patents

Abstract

The present invention relates to an LVR hub built-in NVR device and a packet routing method thereof, and to enable packet routing to ports in which packet routing that occurs when a plurality of L2 hubs are built in the NVR device is possible, and thus the price of the NVR device. It is to increase the competitiveness.

Description

Network video recorder with a built-in L2 hub and packet routing method

The present invention relates to a packet routing technology of an NVR device, and more particularly, to an LVR hub embedded NVR device and a packet routing method thereof.

Korean Patent Publication No. 10-2002-0005770 (January 17, 2002) and the like propose a routing table management technology. In order to double the bandwidth, a port binding technique may be used, in which two physical ports of a network video recorder (NVR) device are logically combined into one and given one address.

However, in this case, two physical ports must be connected to one hub supporting port binding, and a hub with a large number of ports must be used to utilize both physical ports properly.

Hubs are much more expensive than those with fewer ports, so using two hubs with fewer ports is much cheaper than using a hub with many ports.

However, when a plurality of hubs are implemented in the NVR device, the network addresses corresponding to the IP addresses of the plurality of ports of the NVR host may be the same, resulting in non-routing ports among the plurality of ports of the NVR host, Only packets from the physical ports of the highest, most recently Notified NVR device will be routed.

Therefore, the present inventors have made a study on a technology that can increase the price competitiveness of the NVR device by enabling packet routing for ports that do not perform packet routing generated when a plurality of L2 hubs are built in the NVR device. .

Domestic Publication No. 10-2002-0005770 (2002. 01. 17)

The present invention has been invented under the above-mentioned object, and the L2 hub-embedded NVR device and packet routing method thereof that enable packet routing to ports in which packet routing occurs when a plurality of L2 hubs are built in the NVR device are provided. To provide that purpose.

According to an aspect of the present invention for achieving the above object, the L2 hub built-in NVR device NVR (Network Video Recorder) host having a plurality of physical ports; It characterized in that it comprises a plurality of L2 hub (Hub) connected to each of at least two physical ports of the NVR host.

According to an additional aspect of the present invention, the NVR host of the L2 hub embedded NVR device includes an IP address, a subnet mask, and a network address calculated by the respective ports of the NVR host. A network register for registering routing information in a routing table; When a valid packet is received from IP cameras connected to each port of the NVR host, an ARP processing unit that temporarily stores IP addresses of IP cameras that broadcast the valid packet in an address resolution protocol (ARP) table. Wow; Among the IP addresses of IP cameras temporarily stored in the ARP table, identify the IP addresses of the IP cameras connected to the ports of the NVR host where packets are not routed, and set the subnet mask for the IP addresses of the identified IP cameras at the device level. A routing table updating unit for storing routing information including IP addresses of the identified IP cameras, a subnet mask set at a device level, and a network address calculated by the same, in a routing table to update the routing table; And a packet routing unit for processing packet routing for each IP camera with reference to the routing table.

According to another aspect of the present invention, the packet routing method of the L2 hub embedded NVR device includes an IP address, a subnet mask, and a network address calculated by the respective ports of the NVR host. A network registration step of registering routing information, including routing information, in a routing table; When the L2 hub built-in NVR device receives a valid packet from IP cameras connected to each port of the NVR host, the IP address of the IP cameras that broadcast the valid packet is shown in the ARP (Address Resolution Protocol) table. An ARP processing step of temporarily storing in the; An IP camera identification step of identifying, by the L2 hub embedded NVR device, IP addresses of IP cameras connected to ports of NVR hosts through which packets are not routed, among IP addresses of IP cameras temporarily stored in an ARP table; A subnet mask setting step of setting, by the L2 hub embedded NVR device, a subnet mask for IP addresses of IP cameras identified by the IP camera identification step at a device level; The L2 hub built-in NVR device stores routing information in the routing table, including the IP addresses of the IP cameras identified by the IP camera identification step, the subnet mask set at the device level by the subnet mask setting step, and the network address calculated by them. Routing table updating step of updating the routing table; The L2 hub embedded NVR device may include a packet routing step of processing packet routing for each IP camera by referring to a routing table.

The present invention has a useful effect of increasing the price competitiveness of the NVR device by enabling packet routing to ports in which packet routing occurs when a plurality of L2 hubs are built in the NVR device.

1 is a block diagram showing the configuration of an embodiment of an L2 hub built-in NVR device according to the present invention.
2 is a block diagram showing the configuration of an embodiment of the NVR host of the L2 hub built-in NVR device according to the present invention.
3 is a diagram illustrating an example of a routing table before a subnet mask is set at the device level.
4 is a diagram illustrating an example of an updated routing table with a subnet mask set at the device level.
5 is a flowchart illustrating a configuration of an embodiment of a packet routing method of an LVR hub embedded NVR according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The terms used throughout the specification of the present invention have been defined in consideration of the functions of the embodiments of the present invention and can be sufficiently modified according to the intentions and customs of the user or operator. It should be based on the contents of.

1 is a block diagram showing the configuration of an embodiment of an L2 hub built-in NVR device according to the present invention. As shown in FIG. 1, the NVR 100 embedded in an L2 hub according to the present invention includes an NVR (Network Video Recorder) host 110 and a plurality of L2 hubs 120. .

The NVR host 110 has a plurality of physical ports, and a plurality of L2 hubs 120 are connected to at least two physical ports of the NVR host 110 so that a plurality of L2 hubs are embedded in the NVR device. A plurality of IP cameras 200 are connected to the physical ports of each L2 hub 120, respectively.

The reason for embedding multiple L2 hubs in NVR devices is that hubs are more expensive than ports with fewer ports, so using two hubs with fewer ports is much cheaper than using a hub with many ports. The aim is to provide an affordable NVR device with high price competitiveness.

However, when a plurality of hubs are implemented in the NVR device, the network addresses corresponding to the IP addresses of the plurality of ports of the NVR host may be the same, resulting in non-routing ports among the plurality of ports of the NVR host, Only packets from the physical ports of the highest, most recently Notified NVR device will be routed.

Therefore, in order to enable packet routing to ports in which packet routing that occurs when a plurality of L2 hubs are built in the NVR device, a routing table must be manipulated.

The configuration of the NVR host 110 to enable packet routing for ports in which packet routing occurs when a plurality of L2 hubs are built in the NVR device will be described with reference to FIG. 2.

2 is a block diagram showing the configuration of an embodiment of the NVR host of the L2 hub built-in NVR device according to the present invention. The NVR host 110 of the L2 hub built-in NVR device according to this embodiment includes a network register 111, an ARP processor 112, a routing table updater 113, and a packet routing unit 114.

The network register 111 routes routing information including IP addresses, subnet masks, and network addresses calculated by the ports of the NVR hosts 110. Register at

For example, the network register 111 provides a user interface for inputting an IP address and a subnet mask of each port of the NVR host to the user, and thus 'AND' the IP address and subnet mask of each port manually input from the user. The network information may be generated to generate network addresses, and register routing information in the routing table including IP addresses, subnet masks, and network addresses calculated by the ports.

3 is a diagram illustrating an example of a routing table registered by the network register 111, and illustrates an example of a routing table before a subnet mask is set at the device level.

Referring to FIG. 3, if the IP address of port 1 of the NVR host is '128.12.13.1', the IP address of port 2 of the NVR host is '128.12.13.2', and the subnet mask is '255.255.255.0', The network addresses for port 1 and port 2 are the same as '128.12.13.0'.

If you calculate 'AND' the binary value '011111111 000001100 000001101 000000001' for the IP address' 128.12.13.1 'of port 1 and the binary value' 111111111 111111111 111111111 000000000 'for the subnet mask' 255.255.255.0 '' 011111111 000001100 000001101 000000000 ', The network address for port 1 is' 128.12.13.0'.

The binary value '011111111 000001100 000001101 000000010' for IP address' 128.12.13.2 'of port 2 and the binary value' 111111111 111111111 111111111 000000000 'for the subnet mask' 255.255.255.0 'are' AND 'calculated as' 011111111 000001100 000001101 000000000 ', And the port 2 network address is' 128.12.13.0'.

If the network addresses of the port 1 and the port 2 are the same, the NVR host 110 routes the packet only through the upper port 1 in the routing table order, and the port 2 does not route the packet. Communication with IP cameras connected to is impossible.

That is, if the network address value of both port 1 and port 2 is calculated as '128.12.13.0' and stored in the routing table, if port 1 is notified most recently and the priority is high, the IP camera is connected to port 2. In spite of this, packets are not routed to the IP camera connected to port 2.

When a valid packet is received from IP cameras connected to the respective ports of the NVR host 110, the ARP processing unit 112 displays the IP addresses of the IP cameras that broadcast the valid packet. Protocol) Temporarily stores in the table.

In order to solve the problem that packets are routed only through the most notified and high priority port generated when a plurality of hubs are embedded in the NVR device, the present invention provides an NVR host 110 through an ARP processor 112. When a valid packet is received from IP cameras connected to the respective ports, IP addresses of IP cameras that broadcast the valid packet are temporarily stored in an address resolution protocol (ARP) table. At this time, the valid packet means a packet that the IP camera can announce its existence regardless of its contents.

The routing table updater 113 identifies IP addresses of IP cameras connected to ports of the NVR host 110 where packets are not routed among IP addresses of IP cameras temporarily stored in the ARP table, and identifies IP IPs of the identified IP cameras. Update the routing table by setting the subnet mask for the address at the device level and storing routing information in the routing table, including the IP addresses of the identified IP cameras, the subnet mask set at the device level, and the network address computed by them. do.

For example, IP address identification of IP cameras connected to a port of the NVR host 110 where packets are not routed is possible by searching the packet transmission history. Meanwhile, setting the subnet mask for the IP addresses of the identified IP cameras to the device level means that the last digit of the subnet mask for the IP addresses of the identified IP cameras is artificially adjusted to the maximum value, so that each of the identified IP cameras is one. Means to be recognized as a separate sub-network.

FIG. 4 is a diagram illustrating an example of a routing table updated by the routing table updater 113, and illustrates an example of a routing table updated by setting a subnet mask to a device level.

Referring to FIG. 4, the IP address of port 1 of the NVR host is set to '128.12.13.1', the IP address of port 2 of the NVR host is set to '128.12.13.2', and the IP address of the port 2 is set to '128.12.13.3'. If an IP camera set to 'is connected, the subnet mask for the IP address' 128.12.13.3' of the IP camera connected to port 2 where the packet is not routed is set to the device level '255.255.255.255', thus the network address is '128.12.13.3'

That is, although the mask of port 2 is registered as '255.255.255.0' and the network address as '128.12.13.0' in the routing table by the network register 111, the '128.12.13.3' is stored through the routing table updater 113. If the IP address is set to '128.12.13.3', the network address of port 2 to which the IP camera is connected, and if it is stored in the upper order in the routing table, the packet can be transmitted through port 2, which was not possible.

The packet routing unit 114 processes the packet routing through each port with reference to the routing table. That is, as shown in FIG. 4, since there is a network address of port 2 that is different from port 1 in the routing table updated by the routing table updater 113, all ports of the NVR host 110 are present. Packets can be routed through.

Accordingly, packet routing to ports that do not perform packet routing that occurs when a plurality of L2 hubs are built in the NVR device becomes possible, and a plurality of inexpensive L2 hubs can be embedded in the NVR device, thereby providing an NVR device. Because it can increase the price competitiveness, it can achieve the object of the present invention presented above.

As described above, the packet routing procedure of the L2 hub embedded NVR device according to the present invention will be described with reference to FIG. 5. 5 is a flowchart illustrating a configuration of an embodiment of a packet routing method of an LVR hub embedded NVR according to the present invention.

First, in the network registration step 510, the L2 hub built-in NVR device includes routing including IP addresses, subnet masks, and network addresses calculated by the ports of the NVR hosts. Routing) Register information in routing table. Registering routing information in the routing table has been described above, and thus redundant description is omitted.

Next, in the ARP processing step 520, when the L2 hub embedded NVR device receives a valid packet from IP cameras connected to each port of the NVR host, the IP cameras that broadcast the valid packet are received. Temporarily store IP addresses in the Address Resolution Protocol (ARP) table.

Next, in the IP camera identification step 530, the L2 hub embedded NVR device identifies IP addresses of IP cameras connected to ports of NVR hosts through which packets are not routed among IP addresses of IP cameras temporarily stored in the ARP table. Since the IP address identification of the IP cameras connected to the port of the NVR host where the packet is not routed has been described above. Duplicate descriptions are omitted.

Next, in the subnet mask setting step 540, the L2 hub embedded NVR device sets the subnet mask for the IP addresses of the IP cameras identified by the IP camera identification step 530 to the device level. Since the description of setting the subnet mask at the device level for the IP addresses of the identified IP cameras has been described above. Duplicate descriptions are omitted.

Then, in the routing table update step 550, the L2 hub embedded NVR device sets the IP addresses of the IP cameras identified by the IP camera identification step 530, the subnet mask set at the device level by the subnet mask setting step 540, and Routing information including the network address calculated by them is stored in the routing table to update the routing table. Since the routing table update has been described above. Duplicate descriptions are omitted.

Next, in the packet routing step 560, the L2 hub embedded NVR device refers to the updated routing table to route the packet through each port. Accordingly, packet routing to ports that do not perform packet routing that occurs when a plurality of L2 hubs are built in the NVR device becomes possible, and a plurality of inexpensive L2 hubs can be embedded in the NVR device, thereby providing an NVR device. Because it can increase the price competitiveness, it can achieve the object of the present invention presented above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. .

The present invention can be used industrially in the packet routing technology of the NVR device and its application technology.

100: L2 hub built-in NVR device 110: NVR host
111: network registration unit 112: ARP processing unit
113: routing table update unit 114: packet routing unit
120: L2 hub 200: IP camera

Claims (3)

In the NVR (Network Video Recorder) host having a plurality of physical ports and a plurality of L2 hubs (Hub) connected to at least two physical ports of the NVR host, respectively,
The NVR host is:
A network register that registers routing information including IP addresses, subnet masks, and network addresses calculated by the ports of the NVR hosts, in a routing table;
When a valid packet is received from IP cameras connected to each port of the NVR host, an ARP processing unit that temporarily stores IP addresses of IP cameras that broadcast the valid packet in an address resolution protocol (ARP) table. Wow;
Among the IP addresses of IP cameras temporarily stored in the ARP table, identify the IP addresses of the IP cameras connected to the ports of the NVR host where packets are not routed, and set the subnet mask for the IP addresses of the identified IP cameras at the device level. A routing table updating unit for storing routing information including IP addresses of the identified IP cameras, a subnet mask set at a device level, and a network address calculated by the same, in a routing table to update the routing table;
A packet routing unit for processing packet routing through each port with reference to the updated routing table;
L2 hub built-in NVR device comprising a. delete The L2 hub built-in NVR device registers routing information including IP addresses, subnet masks, and network addresses calculated by each port of the NVR host in the routing table. Registering a network;
When the L2 hub built-in NVR device receives a valid packet from IP cameras connected to each port of the NVR host, the IP address of the IP cameras that broadcast the valid packet is shown in the ARP (Address Resolution Protocol) table. An ARP processing step of temporarily storing in the;
An IP camera identification step of identifying, by the L2 hub embedded NVR device, IP addresses of IP cameras connected to ports of NVR hosts through which packets are not routed, among IP addresses of IP cameras temporarily stored in an ARP table;
A subnet mask setting step of setting, by the L2 hub embedded NVR device, a subnet mask for IP addresses of IP cameras identified by the IP camera identification step at a device level;
The L2 hub built-in NVR device stores routing information in the routing table, including the IP addresses of the IP cameras identified by the IP camera identification step, the subnet mask set at the device level by the subnet mask setting step, and the network address calculated by them. Routing table updating step of updating the routing table;
A packet routing step in which the L2 hub embedded NVR device processes the packet routing through each port with reference to the updated routing table;
Packet routing method of the L2 hub built-in NVR device characterized in that it comprises a.

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