TWI450539B - Method of transmitting dlna packet and dlna packet transmitting system - Google Patents

Description

Digital Living Network Alliance (DLNA) packet transmission method and system

The present invention mainly relates to a DLNA (Digital Living Network Alliance, DLNA) packet transmission technology, and in particular to a technology for accessing remote DLNA network data.

Multimedia file sharing has always been one of the most important aspects of digital homes. In the past, when desktop PCs were the mainstream, the file sharing of digital homes was based on regional networks, but in recent years, portable devices. Such as the rise of notebook computers, tablets, smart phones, and the popularity of wireless Internet access, the need to share everywhere has emerged.

The Digital Living Network Alliance (DLNA) standard is based on the original network, such as Ethernet (IEEE 803.3u) and wireless network. The main function of the DLNA standard is on mobile. On the device, consumer electronics and personal computers, establish a common standard that allows different electronic devices to communicate with each other through this common standard. For the user, these common application specifications are handed over to the manufacturer. Coordinated processing, users do not need to install other programs to achieve this. In addition to the network support is necessary, it also uses the Universal Plug and Play (UPnP) technology to achieve seamless connection of home digital products, and simplify the implementation of the network, which is also Why users don't have to deal with too many settings, they can let the device communicate with the main cause of the connection.

The DLNA standard is currently used in the digital home field, and many digital home products have been certified by DLNA. Users can easily access the required content through the DLNA standard, which is easy to enjoy from electronic devices such as personal computers and mobile phones.

However, because when two electronic devices transmit DLNA packets on different networks, they cannot search each other through broadcast, and cannot directly establish a TCP/IP connection.

According to an embodiment of the present invention, a DLNA packet transmission method is provided, which is adapted to be transmitted to a remote network, including: completing a first electronic device and a second electronic device of the remote network through a server. a first analog device and a second analog device are respectively configured by the first electronic device and the second electronic device; and the packet sent by the first electronic device is monitored by the first analog device, when the first When the analog device monitors that the packet sent by the first electronic device is a DLNA packet, the DLNA packet is transmitted to the second analog device through the connection; and the second electronic device obtains the foregoing by using the second simulation device. DLNA packet.

According to an embodiment of the present invention, a DLNA packet transmission system is provided, which is adapted to transmit a DLNA packet to a remote network, including: a server; a first electronic device, configured in a regional network, in the foregoing area The network establishes a first analog device, wherein the first analog device monitors a packet sent by the first electronic device; and a second electronic device is configured on the remote network, and establishes a The second simulation device, wherein the server establishes a connection between the first electronic device and the second electronic device, and the first analog device monitors a packet sent by the first electronic device when the first simulation When the device monitors that the packet sent by the first electronic device is a DLNA packet, the device transmits the DLNA packet to the second analog device of the second electronic device, and the second electronic device receives the second analog device through the second analog device. The above DLNA packet.

The disclosure of the present invention provides many different embodiments or examples, and different technical features applied in different embodiments will be understood after reading this specification. The contents and practices of the specific embodiments are described below to simplify the disclosure of the present invention. Of course, these embodiments are not intended to limit the invention. Moreover, in various embodiments, the present invention may reuse the same index number and/or text. The use of such indexing labels and/or text is intended to simplify and clarify the invention, but is not intended to indicate that the various embodiments and/or disclosed structures must have the same features.

FIG. 1A is a block diagram showing a DLNA packet transmission system 100 according to an embodiment of the present invention. The DLNA packet transmission system 100 is adapted to transmit a DLNA packet to a remote network 150. As shown in the figure, a DLNA packet transmission system 100 according to an embodiment of the invention includes a server 110, a first electronic device 120, and a second electronic device 130.

The server 110 is a Peer-to-Peer (P2P) server, and the P2P server is used to provide device registration, identity authentication, and auxiliary point-to-point connection between the first electronic device 120 and the second electronic device 130. Connected.

FIG. 1B is a block diagram showing a DLNA packet transmission system 100 after establishing a P2P connection according to an embodiment of the invention. As shown in FIG. 1B, after the P2P connection is established, the first electronic device 120 is disposed in a regional network 140, and a first simulation device 121 is established in the local area network 140, and the first simulation device 121 It has a first virtual IP (not shown). The first analog device 121 is responsible for monitoring the packet sent by the first electronic device 120. When the first analog device 121 detects that the packet sent by the first electronic device 120 is a DLNA packet P1, the DLNA packet P1 is intercepted and the DLNA is modified. The sender address of the packet P1 is the first virtual IP. The second electronic device 130 is disposed in the remote network 150.

The second electronic device 130 also establishes a second analog device 131 in the remote network 150, and the second analog device 131 has a second virtual IP (not shown). In addition, the second electronic device 130 transmits the second simulation. The device 131 receives the DLNA packet P1 from the P2P connection. According to an embodiment of the present invention, when the second analog device 131 receives the DLNA packet P1 having the first virtual IP, the DLNA packet P1 is converted to have the second virtual IP and output to the second electronic device 130. In more detail, the DLNA packet P1 will have a sender address and a receiver address to distinguish between a specific sender device and a receiver device. When the first electronic device 120 wants to transmit the DLNA packet P1 to the second electronic device 130, the transmitting end address is the first IP of the first electronic device 120, and the receiving end address is the second IP of the second electronic device 130. After the DLNA packet P1 is transmitted to the second analog device 131 through the P2P connection, the second analog device 131 changes the address of the transmitting end of the DLNA packet P1 from the first IP to the second virtual IP, so that the DLNA packet P1 finally succeeds. The ground is transmitted from the second simulation device 131 to the second electronic device 130. If the second electronic device 130 wants to transmit the DLNA packet P1 to the first electronic device 120, the operation flow may be analogized, and details are not described herein.

According to an embodiment of the invention, the first simulation device 121 and the second simulation device 131 may be connected to the electronic device in a manner of a single device or integrated in one of the network devices of the electronic device.

According to an embodiment of the present invention, when the first analog device 121 detects that the packet sent by the first electronic device 120 is not a DLNA packet P1, it is transmitted through a general network protocol. The way the network protocol is referred to is the Transmission Control Protocol/Internet Protocol (TCP/IP).

It should be noted that the remote network 150 in FIG. 1 only displays a second electronic device 130 for the purpose of simplifying the present invention and is not intended to limit the present invention. For anyone skilled in the art, after reading this description, more than two electronic devices can be used in the remote network, and the technical effects of the present invention can be achieved.

According to an embodiment of the invention, according to an embodiment of the invention, the DLNA packet P1 is transmitted in a (Unicast) single point or multiple point (Multicalt) manner, for example, when the DLNA packet P1 is in a regional network. For example, in the case of transmission, the unicast is a one-to-one method. When the DLNA packet P1 is transmitted to the regional network, the packet carries the IP address of the transmitting end and the receiving end, and only the device with the specific receiving end IP receives the IP address. Packets; multi-point transmission adopts one-to-many mode. When transmitting DLNA packet P1 to the local area network, the packet will have a sender and a specific broadcast location, and all DLNA-enabled devices in the network will receive the packet.

2 is a flow chart 200 showing a DLNA packet transmission method according to another embodiment of the present invention. This method is suitable for transmitting DLNA packets to a remote network. In step S202, the first electronic device in a regional network and the second electronic device in the remote network are first registered on the P2P server, and the locations of the first electronic device and the second electronic device are recorded in the P2P. On the server. In step S204, the first electronic device and the second electronic device can complete the point-to-point connection through the P2P server. In step S206, the first electronic device and the second electronic device respectively establish a first simulation device and a second simulation device, wherein the first simulation device has a first virtual IP, and the second simulation device has a second virtual device. IP, and the DLNA packet sent by the first analog device has the first virtual IP described above. In step S208, the first analog device is responsible for monitoring the packet sent by the first electronic device, and when the first analog device monitors that the packet sent by the first electronic device is a DLNA packet, the DLNA packet is transmitted through the P2P connection. To the second simulation device. Finally, in step S210, the second electronic device acquires the DLNA packet via the second simulation device, where the second analog device converts the DLNA packet into the second virtual state when receiving the DLNA packet with the first virtual IP by the P2P connection. IP and output to the second electronic device.

According to the embodiment of the present invention, the electronic device capable of establishing an analog device can be used to allow the user to access the multimedia data of the home network on the external network at any time on the basis that the P2P server has established a connection. In terms of convenience, the user does not need to worry about the data being out of sync between different devices, and the device under the home network can be used as the main storage device, and the device can access the home network at any time. In terms of efficiency, if different networks are integrated in the architecture of common gateways, the gateway will become a bottleneck as the size of the home network grows, but the point-to-point architecture does not have this disadvantage. In terms of security, this concept designs network authentication to prevent unauthenticated devices from illegally accessing data on the home network.

The specific features, structures, or properties mentioned in the "invention" or "embodiment" referred to in the specification may be included in at least one embodiment of the present specification. Therefore, statements that appear in different places, "in one embodiment," may not all refer to the same embodiment. In addition, this particular feature, structure, or property may be combined with one or more embodiments in any suitable manner.

The embodiments disclosed herein will readily appreciate the above advantages for anyone skilled in the art. After reading the contents of the specification, any person skilled in the art can make appropriate changes and substitutions in a broad manner without departing from the spirit and scope of the invention. Therefore, the embodiments disclosed in the present specification are intended to protect the scope of the claims of the present invention and are not intended to limit the scope of the invention.

100‧‧‧DLNA packet transmission system

120‧‧‧First electronic device

130‧‧‧Second electronic device

121‧‧‧First simulation device

131‧‧‧Second simulation device

140‧‧‧Regional Network

150‧‧‧Remote network

P1‧‧‧DLNA packet

FIG. 1A is a block diagram showing a DLNA packet transmission system 100 according to an embodiment of the present invention.

FIG. 1B is a block diagram showing a DLNA packet transmission system 100 after establishing a P2P connection according to an embodiment of the invention.

2 is a flow chart 200 showing a DLNA packet transmission method according to another embodiment of the present invention.

100‧‧‧DLNA packet transmission system

120‧‧‧First electronic device

130‧‧‧Second electronic device

121‧‧‧First simulation device

131‧‧‧Second simulation device

140‧‧‧Regional Network

150‧‧‧Remote network

P1‧‧‧DLNA packet

Claims (6)

A DLNA packet transmission method, configured to be transmitted to a remote network, comprising: connecting, by a server, a first electronic device of a regional network and one of the second electronic devices of the remote network; A first analog device and a second analog device are respectively configured by the first electronic device and the second electronic device; and the packet sent by the first electronic device is monitored by the first analog device, when the first analog device monitors And when the packet sent by the first electronic device is a DLNA packet, that is, the DLNA packet is transmitted to the second analog device by using the connection; and the second electronic device obtains the DLNA packet by using the second simulation device, where The first analog device has a first virtual IP, and the second analog device has a second virtual IP, and wherein the second analog device converts the DLNA packet to have the second virtual IP, and output to the above second electronic device. The DLNA packet transmission method according to claim 1, wherein the server is a P2P server, and the P2P server is configured to register and authenticate the first electronic device and the second electronic device. The DLNA packet transmission method according to claim 1, wherein the analog device is connected to the electronic device in a separate device or integrated in a network card of the electronic device. A DLNA packet transmission system, configured to transmit a DLNA packet to a remote network, comprising: a server; a first electronic device, configured in a regional network, and establishing a first analog device in the regional network And a second electronic device, configured on the remote network, and establishing a second analog device on the remote network; wherein the server establishes between the first electronic device and the second electronic device a connection, and the first analog device monitors the packet sent by the first electronic device, and when the first analog device monitors that the packet sent by the first electronic device is a DLNA packet, the first analog device transmits the packet through the connection. The DLNA packet is packetized to the second simulation device, and the second electronic device receives the DLNA packet through the second simulation device, wherein the first simulation device has a first virtual IP, and the second simulation device has a second virtual device. IP, and when the second analog device receives the DLNA packet, converting the DLNA packet to have the second virtual IP, and outputting to The second electronic device described above. The DLNA packet transmission system according to claim 4, wherein the server is a P2P server, and the P2P server is configured to register and authenticate the first electronic device and the second electronic device. The DLNA packet transfer system of claim 4, wherein the analog device is in a separate device and the above The electronic device is connected or integrated in a network card of one of the above electronic devices.