WO2012174927A1 - Système de vidéosurveillance et procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau - Google Patents

Système de vidéosurveillance et procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau Download PDF

Info

Publication number
WO2012174927A1
WO2012174927A1 PCT/CN2012/073994 CN2012073994W WO2012174927A1 WO 2012174927 A1 WO2012174927 A1 WO 2012174927A1 CN 2012073994 W CN2012073994 W CN 2012073994W WO 2012174927 A1 WO2012174927 A1 WO 2012174927A1
Authority
WO
WIPO (PCT)
Prior art keywords
nat
nat traversal
packet
request packet
network address
Prior art date
Application number
PCT/CN2012/073994
Other languages
English (en)
Chinese (zh)
Inventor
欧阳永辉
肖丹
况成禹
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012174927A1 publication Critical patent/WO2012174927A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2564—NAT traversal for a higher-layer protocol, e.g. for session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/256—NAT traversal
    • H04L61/2575—NAT traversal using address mapping retrieval, e.g. simple traversal of user datagram protocol through session traversal utilities for NAT [STUN]

Definitions

  • the present invention relates to a network media transmission technology, and more particularly to a video surveillance system and a method for media traversing a network address translation (NAT) device.
  • NAT network address translation
  • the network monitoring system transmits media through the internal Internet (Intranet) and the Internet (Internet) for remote video surveillance.
  • Internet Internet
  • users can use the computer or TV to log on to the Internet to connect to the remote monitoring system for real-time image and sound transmission.
  • Video surveillance is widely used in many situations, such as public security bureaus, banks, schools, hospitals, and highways, because of its intuitiveness, convenience, and rich information content.
  • video surveillance technology has also made great progress.
  • a NAT device allows multiple hosts behind the same NAT to share a public network (usually the network before the NAT is called the public network).
  • a private network (a network that is generally behind a NAT is called a private network or an intranet).
  • An IP address communicates with other hosts on the public network through a NAT device.
  • the host in the private network initiates the connection.
  • the data packet is forwarded to the server on the public network after the NAT address is translated. After the connection is established, the data can be transmitted in both directions.
  • the NAT device allows the host in the private network to send data to the host in the public network. In the video surveillance system, hosts in different private networks need to be interconnected. The problem of traversing NAT must be solved.
  • the existing patent documents include: Chinese patent application with patent application number CN200710195416.3
  • Video surveillance-based method for front-end video on demand to traverse NAT Patent No. CN200610021989, Chinese patent application “Method for UDP-based streaming media traversing NAT device” and Chinese patent application with patent number CN200810216944.7” System implementation The method and system for media to traverse NAT”.
  • the Chinese patent application No. CN200710195416.3 utilizes a streaming media server for forwarding.
  • the method described in the Chinese patent application of CN200810216944.7 is a method of directly connecting from the client to the monitoring front end, extending RTSP signaling to realize media signaling and The passage of the media.
  • the CN200610021989 Chinese patent is also the transit of the media through the streaming media server.
  • the technical problem to be solved by the present invention is how to solve the problem that the media traversing the NAT under various conditions between the monitoring front end and the client, so that a video monitoring system and a method for the media to traverse the NAT device are provided.
  • NAT network address translation
  • the two parties of the session initiate a NAT traversal request packet carrying the network address and the port information, and the party receiving the NAT traversal request packet parses the NAT traversal request packet, and obtains the NAT traversal request packet.
  • the source network address and port information of the NAT requesting device, and the source network address and port information of the obtained NAT requesting device are fed back to the NAT traversal request packet initiator by using the NAT traversal response packet, when the NAT traversal request packet initiator is The result of comparing the source network address and port of the NAT traversal packet in the NAT traversal packet with the network address and port information of the NAT traversal packet, and determining that it is in the private network, periodically sends a NAT traversal packet to the other party.
  • the NAT traversal request packet initiator determines that the user is in the private network according to the comparison between the network address and the port in the NAT traversal response packet and the network address and port information.
  • the NAT traversal request packet initiator compares the source network address of the NAT traversal device in the NAT traversal response packet with its own network address, and traverses the NAT request in the response packet. When the port of the device is compared with its own port, if at least one comparison result is different, it is determined that it is in the private network.
  • the NAT traversal packet initiator determines that both comparison results are the same, the NAT traversal packet is stopped.
  • the NAT traversal request packet initiator connection sends the NAT traversal request packet to a set value, and the NAT traversal response packet is not received, the NAT traversal request is stopped. package.
  • the NAT traversal request packet initiator further carries the identifier information of the session in the NAT traversal request packet, and the received NAT traversal response packet is received by a party that receives the NAT traversal request packet.
  • the identification information of the session is carried in the middle.
  • the invention also discloses a video monitoring system, comprising:
  • the NAT traversal request packet initiator is configured to: in the process of establishing a session in the video surveillance system, initiate a NAT traversal request packet carrying its own network address and port information to the other party of the session, and according to the received NAT traversal response packet The result of comparing the source network address and port of the NAT requesting device with the network address and port information of the device, and determining that the user is in the private network, periodically sends a NAT traversal packet to the other party of the session;
  • the NAT traversal request packet receiver is configured to: parse the NAT traversal request packet sent by the peer of the session, obtain the source network address and port information of the NAT requesting device, and obtain the source network of the obtained NAT requesting device by using the NAT traversal response packet. The address and port information is fed back to the NAT traversal request packet initiator.
  • the NAT traversal request packet initiator is configured to: determine that the user is in the private network according to the comparison between the network address and the port in the NAT traversal response packet and the network address and port information.
  • the process is as follows:
  • the NAT traversal request packet initiator compares the source network address of the NAT requesting device in the NAT traversal response packet with its own network address, and compares the port of the NAT traversal packet in the NAT traversal packet with its own port, at least When a comparison result is different, it is determined that it is in the private network.
  • the NAT traversal request packet initiator determines that both comparison results are When they are the same, stop sending NAT traversal packets.
  • the NAT traversal request packet initiator is further configured to: when the number of times the connection sends the NAT traversal request packet reaches a set value, and the NAT traversal response packet is not received, the sending of the packet is stopped.
  • the NAT traversal request packet is further configured to: when the number of times the connection sends the NAT traversal request packet reaches a set value, and the NAT traversal response packet is not received, the sending of the packet is stopped.
  • the NAT traversal request packet is further configured to: when the number of times the connection sends the NAT traversal request packet reaches a set value, and the NAT traversal response packet is not received, the sending of the packet is stopped.
  • the NAT traversal request packet initiator is further configured to:
  • the NAT traversal request packet carries the identification information of the session
  • the NAT traversal request packet receiver is further configured to: carry the identifier information of the session in the NAT traversal response packet fed back to the NAT traversal request packet initiator.
  • the technical solution of the present invention realizes the detection of NAT by using the existing equipment and service platform of the system, and the SIP and the custom NAT traversal package, and effectively solves the monitoring front end to the video monitoring system.
  • FIG. 1 is a schematic flowchart of media traversing NAT in the first embodiment
  • FIG. 2 is a flow chart of the CU traversing with the technical solution of the present invention when the private network PU is on the public network
  • FIG. 3 is a flow chart of the CU traversing with the technical solution of the present invention when the public network PU is in the private network
  • the flow chart of the technical solution of the present invention is used.
  • the client and the monitoring front end need to be configured to determine the location of each device, that is, whether the devices are on the public network or the private network, so that when the media traverses the NAT , according to the location of the device, select the appropriate way to traverse.
  • such an operation is not only cumbersome, but also needs to be configured again when the system is updated (such as adding or removing devices).
  • the applicant of the present case considers canceling the configuration operation, and in the process of establishing the session, the two parties respectively initiate a traversal request packet including the own network address and port information to the opposite end, and the receiving party receives the traversal request packet.
  • the network address and port information in the traversal request packet is the source network address and port of the NAT requesting device, and only the source network address and port of the NAT requesting device are fed back to the initiator.
  • the initiator compares the source network address and port of the NAT requesting device with its own network address and port, and according to the comparison result, whether the traversal request packet is converted by the NAT device, thereby determining its own location (ie, determining whether it is in the private network) For subsequent NAT traversal. In this way, the detection of NAT is accurately implemented, thereby solving the problem of media traversing NAT in various situations between the monitoring front end and the client.
  • the embodiment provides a method for media to traverse a NAT device, and the method includes:
  • the two parties initiate a NAT traversal request packet carrying the network address and port information to the other party, and the party receiving the NAT traversal request packet parses the NAT traversal request packet to obtain a NAT request.
  • the source network address and port information of the device, and the source network address and port information of the obtained NAT requesting device are fed back to the NAT traversal request packet initiator by using the NAT traversal response packet, and the NAT traversal request packet initiator is according to the NAT traversal response packet.
  • the result of comparing the source network address and port of the NAT requesting device with its own network address and port information, and determining that it is in the private network periodically sends a NAT traversal packet to the other party.
  • the NAT traversal request packet initiator compares the source network address of the NAT traversal device in the NAT traversal packet with its own network address, and compares the port of the NAT traversal device in the NAT traversal packet with its own port;
  • the NAT traversing request packet The initiator determines that it is in the private network, and then periodically sends a NAT traversal packet to the other party;
  • the NAT traversal request packet initiator When the two comparison results are the same, the NAT traversal request packet initiator considers that the two parties may be in the same network, and does not need NAT traversal, so the NAT traversal packet is stopped to save bandwidth; and when the NAT traversal request packet initiator does not Upon receiving the NAT traversal response packet, the NAT traversal request packet initiator considers that it may be in the public network, and the other party is located in the private network, so the NAT traversal request packet is stopped. In a preferred solution, the NAT traversal request packet initiator sends a NAT traversal request packet. If the number of times the connection is sent reaches the set value, and no NAT traversal response packet is received, the NAT traversal request packet is stopped.
  • the two sessions are the front end (Pre Unit, PU) and the client (Client unit, cu).
  • the following describes the process of traversing a NAT device by using a specific process.
  • the process is as shown in FIG. 1 and includes the following steps:
  • Step A Both the client and the monitoring front end are registered to the service platform.
  • Step B Before the direct connection is played, the client obtains the called address and signaling port number of the monitoring front end from the service platform.
  • Step C The client and the monitoring front end complete the SDP (Session Description Protocol) through a signaling protocol, such as RTSP (Real Time Streaming Protocol) and SIP (Session Initiation Protocol).
  • RTSP Real Time Streaming Protocol
  • SIP Session Initiation Protocol
  • Step D Both parties send a NAT traversal request packet according to the IP and port obtained in step C. If the CU is behind the NAT device and the PU is on the public network device, the UA can only send the NAT traversal packet. The NAT traversal packet sent by the PU is definitely not responding. After three consecutive failures, the NAT traversal packet is stopped.
  • the NAT traversal packet can only be sent by the PU.
  • the NAT traversal packet sent by the CU is definitely not responding. After three consecutive unresponsive responses, the NAT traversal packet is stopped. If the CU and the PU are in the same network, both the CU and the PU may send the NAT traversal packet. After receiving the response, the CU and the PU determine that the IP address and port number in the NAT traversal packet in the request and response message are the same, and then stop sending.
  • NAT traversal package If the CU and the PU are in different private networks, the problem of video surveillance can be solved by means of relay playback. The CU and the PU perform NAT traversal with the SS, respectively.
  • Step E The two parties judge whether they are in the private network according to the result of the traversal. If yes, periodically send the NAT traversal packet to keep the NAT channel unblocked, and perform step F; otherwise, stop sending the NAT traversal packet to save bandwidth.
  • the NAT traversal packet can completely adopt the text format, and adopts the PLAY and RECORD formats of the RTSP, wherein the PLAY is used by the client to send the NAT traversal packet, and the specific format is defined.
  • Table 1 shows the contents of the NAT traversal request packet of the client.
  • Table 2 shows the contents of the NAT traversal response packet of the client
  • npt now- Session: 123456789
  • Table 4 shows the contents of the NAT traversal response packet of the monitoring front end.
  • the NAT traversal request packet and the NAT traversal response packet are paired by Session and CSeq, that is, the Session and CSeq of the NAT traversal request packet and its corresponding NAT traversal response packet are the same.
  • local_addr 10.6.10.102
  • src_addr 210.6.10.102
  • the NAT traversal package of RTCP is similar to the above, except that the values of CSeq, type and port contents are different.
  • the NAT traversal request packet sender detects that local-addr is equal to src addr and local_port is equal to src_port, it can stop sending NAT traversal packets, otherwise timing Send a NAT traversal package.
  • the URL and Session in the NAT packet are uniformly used in the URL and session specified in the SDP negotiation.
  • Step F The PU sends an RTP/RTCP packet to the CU, and the CU displays the video picture, plays the sound, and returns an RR (Receiver Report RTCP Packet, RTCP packet connection: response) to the PU.
  • RR Receiveiver Report RTCP Packet, RTCP packet connection: response
  • Step G The client sends a stop monitoring request to the monitoring front end.
  • Step H The monitoring front end sends a stop monitoring response to the client.
  • Step I The monitoring front end stops sending media stream to the client.
  • the process of the foregoing media traversing the NAT device is separately described in combination with different application scenarios.
  • the client is on the private network, and the monitoring front-end and platform are on the public network.
  • the process of media traversing the NAT device according to the above method is: the client completes the SIP signaling interaction through the platform and the monitoring front end, and obtains the IP and RTP/RTCP ports of the other party, the session ID, and the URL of the traversal package.
  • the client sends a PLAY traversal request packet of the RTSP type to the monitoring front end, fills in its own private network address and port, and requests the packet to reach the monitoring front end after passing through the NAT device, and the monitoring front end parses the request packet after obtaining the client NAT from the network layer.
  • the public network address and port, the monitoring front end fills the address and port in the response packet and sends it to the NAT device.
  • the NAT device forwards it to the client, and the client parses the response packet to determine whether the two addresses are the same and the two ports. Is it the same? As long as one of them is different, the client is on the private network and needs to send the traversal request packet periodically; otherwise, it does not need to continue to send.
  • the monitoring front end sends the RECORD traversal request packet of the RTSP to the client. Since the client is private network address cannot be routed on the public network, the request packet cannot reach the client and receives a response, and the three unresponsive monitoring front end stops sending the traversal request packet.
  • the PU sends an RTP/RTCP packet to the NAT device, and the NAT device forwards it to the CU, and the CU replies to the RR packet.
  • the subsequent process is a general hang-up process, and will not be described again.
  • the monitoring front end is located on the private network, and the client and platform are located on the public network.
  • the process is similar to that of Figure 2 and will not be described again.
  • the monitoring front end and the client are located in different private networks, and the video monitoring problem can be solved through the relay playing.
  • CU and PU respectively with streaming server (Streaming Server, SS) performs NAT traversal, and its flow is similar to the traversal between CU and PU, and will not be described again.
  • streaming server Streaming Server, SS
  • both the CU and the PU may send a NAT traversal packet.
  • the CU and the PU determine the IP address and the NAT traversal packet in the request and response message. If the port number is the same, the NAT traversal packet is stopped.
  • This embodiment introduces a video monitoring system, which can implement the process of media traversing a NAT device as proposed in Embodiments 1 and 2.
  • the system includes at least:
  • the NAT traversal request packet initiator initiates a NAT traversal request packet carrying its own network address and port information to the other party in the session in the process of establishing a session in the video surveillance system, and traversing the NAT in the response packet according to the received NAT.
  • the source network address and port of the requesting device are compared with the network address and port information of the device, it is determined that the NAT traversal packet is periodically sent to the peer of the session when it is in the private network.
  • the two sides of the session are a Pre-Purpose Front End (PU) and a Client (Client Unit, CU).
  • the monitoring front end is connected with a camera, encodes the video data input by the camera, and sends it to the network.
  • the client, receiving the media stream, decoding, displaying the image can be a terminal device, or can be a client program running on the computer.
  • the NAT traversal request packet initiator compares the source network address of the NAT traversal device in the NAT traversal packet with its own network address, and compares the port of the NAT traversal device in the NAT traversal packet with its own port. When at least one of the comparison results is different, it is determined that the user is in the private network. At this time, the NAT traversal packet is periodically sent to the other party of the session. When the two comparison results are the same, the NAT traversal request packet initiator stops sending the NAT traversal packet to the other party.
  • the NAT traversing request packet receiver parses the NAT traversal request packet sent by the peer of the session, obtains the source network address and port information of the NAT requesting device, and obtains the source network address and port of the obtained NAT requesting device through the NAT traversal response packet. Information is fed back to the NAT traversal request packet initiator.
  • the NAT traversal request packet initiator carries the identifier information of the session in the NAT traversal request packet, and accordingly, the NAT traversal request packet receiver also carries in the NAT traversal response packet.
  • the identification information of the session In this way, both parties can know that the received packet is sent by the other party to the session.
  • the NAT traversal request packet when the number of times that the NAT traversal request packet initiator sends the NAT traversal request packet reaches a set value, and the NAT traversal response packet is not received, the NAT traversal request packet is also stopped to save bandwidth. .
  • the technical solution of the invention realizes the detection of NAT by using the existing equipment and the service platform of the system, and the SIP and the custom NAT traversal package, and effectively solves various situations between the monitoring front end and the client end.
  • the problem of media traversing NAT is the problem of media traversing NAT.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention porte sur un dispositif de vidéosurveillance et sur un procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau (NAT), concernant la technologie d'envoi de contenu multimédia en réseau. Le procédé comprend les opérations suivantes : les deux parties établissant une session dans le système de vidéosurveillance s'envoient l'une à l'autre un paquet de demande de traversée NAT comprenant une adresse réseau et des informations de port respectives ; une partie réceptrice analyse le paquet de demande de traversée NAT afin d'obtenir l'adresse réseau source et les informations de port d'un dispositif de demande NAT, et renvoie l'adresse réseau source et les informations de port obtenues du dispositif de demande NAT à la partie expéditrice du paquet de demande de traversée NAT par l'intermédiaire d'un paquet de réponse de traversée NAT ; et lorsque la partie expéditrice du paquet de demande de traversée NAT détermine que la partie expéditrice se trouve dans un réseau privé conformément à un résultat de comparaison entre son adresse réseau et ses informations de port et l'adresse réseau source et les informations de port du dispositif de demande NAT figurant dans le paquet de réponse de traversée NAT, la partie expéditrice du paquet de demande de traversée NAT envoie périodiquement le paquet de traversée NAT à l'autre partie. La solution technique de la présente invention résout le problème de traversée de contenu multimédia à travers le NAT d'un frontal de surveillance à un client dans diverses conditions.
PCT/CN2012/073994 2011-06-20 2012-04-13 Système de vidéosurveillance et procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau WO2012174927A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110165848.6 2011-06-20
CN 201110165848 CN102215276A (zh) 2011-06-20 2011-06-20 一种视频监控系统及媒体穿越网络地址转换设备的方法

Publications (1)

Publication Number Publication Date
WO2012174927A1 true WO2012174927A1 (fr) 2012-12-27

Family

ID=44746401

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/073994 WO2012174927A1 (fr) 2011-06-20 2012-04-13 Système de vidéosurveillance et procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau

Country Status (2)

Country Link
CN (1) CN102215276A (fr)
WO (1) WO2012174927A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI467992B (zh) * 2013-03-22 2015-01-01 Univ Nat Taipei Technology 插隊狀況下的ｎａｔ多路穿越法

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102215276A (zh) * 2011-06-20 2011-10-12 中兴通讯股份有限公司 一种视频监控系统及媒体穿越网络地址转换设备的方法
CN103873826B (zh) * 2014-03-06 2017-08-15 浙江宇视科技有限公司 媒体流发送控制方法及装置
CN103888734B (zh) * 2014-03-26 2017-08-15 浙江宇视科技有限公司 两层私网下媒体流控制方法及装置
CN104158884B (zh) * 2014-08-20 2018-02-23 北京比邻在线信息技术有限公司 基于移动互联网的语音通信方法
CN104270603B (zh) * 2014-09-18 2018-03-06 福建星网物联信息系统有限公司 获取视频流的方法和监控系统
CN104253980B (zh) * 2014-09-25 2018-01-16 浙江宇视科技有限公司 一种前端设备与后台媒体设备的连接方法及装置
CN105871521B (zh) * 2016-06-03 2019-04-30 浙江宇视科技有限公司 一种数据传输方法、装置及视频监控系统
CN110830597A (zh) * 2018-08-07 2020-02-21 深圳市玖胜云智联科技有限公司 机器人及其基于Linux系统实现AI多媒体交互的方法
CN111131528B (zh) * 2018-10-31 2022-07-05 杭州海康威视系统技术有限公司 一种设备网域确定方法、服务器及终端
CN109862132B (zh) * 2019-02-22 2021-08-17 安徽睿极智能科技有限公司 一种视频监控平台自适应穿透异网的方法
CN112468610B (zh) * 2020-11-17 2023-06-06 杭州安恒信息安全技术有限公司 数据传输方法、监控节点、监控服务器及监控网络系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1404082A2 (fr) * 2002-09-24 2004-03-31 Nortel Networks Limited Méthodes de détermination d'adresses de réseau et de port
US20050100001A1 (en) * 2003-11-12 2005-05-12 Chung-Fan Liu Routing method and SIP server using the same
CN1893394A (zh) * 2005-07-05 2007-01-10 华为技术有限公司 一种穿越网络地址转换的方法
CN101729862A (zh) * 2008-10-21 2010-06-09 中兴通讯股份有限公司 一种视频监控系统实现媒体穿越nat的方法和系统
CN102215276A (zh) * 2011-06-20 2011-10-12 中兴通讯股份有限公司 一种视频监控系统及媒体穿越网络地址转换设备的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1404082A2 (fr) * 2002-09-24 2004-03-31 Nortel Networks Limited Méthodes de détermination d'adresses de réseau et de port
US20050100001A1 (en) * 2003-11-12 2005-05-12 Chung-Fan Liu Routing method and SIP server using the same
CN1893394A (zh) * 2005-07-05 2007-01-10 华为技术有限公司 一种穿越网络地址转换的方法
CN101729862A (zh) * 2008-10-21 2010-06-09 中兴通讯股份有限公司 一种视频监控系统实现媒体穿越nat的方法和系统
CN102215276A (zh) * 2011-06-20 2011-10-12 中兴通讯股份有限公司 一种视频监控系统及媒体穿越网络地址转换设备的方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI467992B (zh) * 2013-03-22 2015-01-01 Univ Nat Taipei Technology 插隊狀況下的ｎａｔ多路穿越法

Also Published As

Publication number Publication date
CN102215276A (zh) 2011-10-12

Similar Documents

Publication Publication Date Title
WO2012174927A1 (fr) Système de vidéosurveillance et procédé de traversée de contenu multimédia à travers un dispositif de traduction d'adresse réseau
US11108570B2 (en) Method and apparatus for multimedia communication, and storage medium
US9246915B2 (en) Streaming media for portable devices
WO2010045834A1 (fr) Procédé et système pour système de surveillance vidéo permettant aux supports de passer par une traduction d'adresse réseau
US9696866B2 (en) Remote wireless screen sharing method, device and system
RU2552176C2 (ru) Управление сеансом связи для передачи медиапотока
JP5474983B2 (ja) Ｉｐｔｖセッションをセットアップするためのネットワーク装置及び方法
WO2019184262A1 (fr) Procédé de traversée de traduction d'adresse de réseau de données multimédias de multiples types, terminal et système
US20110295943A1 (en) Data processing system and method
WO2011022994A1 (fr) Procédé, appareil et système d'acquisition rapide de sessions de protocole de transport de multidiffusion en temps réel
US20130290517A1 (en) Nat traversal under tcp for real time streaming protocol
CN111107445B (zh) 一种媒体协议流优化方法及系统
WO2010025676A1 (fr) Procédé, dispositif et système de communication d’un média de diffusion en flux
US8356325B2 (en) System and method for transferring a session across domains and subscriptions
US20240121288A1 (en) Supporting quality of service for media communications
WO2017152566A1 (fr) Procédé de négociation de codage/décodage multimédia, et dispositif terminal
US8619117B2 (en) Method for transmitting multimedia ticker information
JP6465324B2 (ja) コンテンツを送信する方法及びデバイス
CN102510470B (zh) 一种媒体流数据复制方法和设备
KR20110000593A (ko) 멀티캐스트 스트림을 이용하여 주문형 스트리밍 콘텐츠의 제공을 촉진하기 위한 방법 및 장치
JP2009171082A (ja) ストリーミング送信制御方法、セッション制御サーバ、ストリーミング配信サーバ及びプログラム
WO2006000141A1 (fr) Systeme de securite du reseau multimedia et procede correspondant
US20110161499A1 (en) Network address translation method, network address translator, and communication system for media streaming
KR101528268B1 (ko) 콘텐츠를 원격 위치들에 스트리밍하기 위한 시스템과 방법
JP5384431B2 (ja) 配信サーバ及び方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12803370

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12803370

Country of ref document: EP

Kind code of ref document: A1