[특허]Method of implementing traversal of multimedia protocols through network address translation device

[미국특허] Method of implementing traversal of multimedia protocols through network address translation device 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-012/28
출원번호	US-0212854 (2011-08-18)
등록번호	US-8605728 (2013-12-10)
우선권정보	CN-03 1 59214 (2003-09-02)
발명자 / 주소	Yang, Shu
출원인 / 주소	Huawei Technologies Co., Ltd.
대리인 / 주소	Huawei Technologies Co., Ltd.
인용정보	피인용 횟수 : 4 인용 특허 : 31

초록 ▼

The present invention discloses a method of implementing traversal of multimedia protocols through Network Address Translation device, wherein the Network Address Translation (NAT) device establishes a mapping relationship between address of a terminal in a private network and address of a terminal in a public network, and enables the terminal in the private network to access the public network with a common address, so as to implement the interaction of media streams between the terminal in the private network and the terminal in the public network, in which the common address is a address of the private network for accessing the public network.

대표청구항 ▼

1. A method for implementing traversal of multimedia protocols to enable a terminal in a private network to access a public network with a common address, the method comprising: acquiring, by the terminal in the private network, an address of a terminal in a public network for sending media streams;sending, by the terminal in the private network, a redirect packet to the terminal in the public network, in which a destination address of the redirect packet is the address of the terminal in the public network for sending media streams;wherein a source address in the redirect packet is replaced with the common address and a mapping relationship is established between the source address in the redirect packet before the replacement and the common address in the redirect packet after the replacement;wherein the terminal in the private network is operable for receiving the media streams from the terminal in the public network;wherein a destination address of the media streams is the common address which is replaced with the source address of the terminal in the private network in accordance with the mapping relationship; andwherein the terminal in the private network sends redirect packets periodically to the terminal in the public network via an address translating device, to make the address translating device refresh timeout time for the mapping relationship. 2. The method according to claim 1, wherein before acquiring, by the terminal in the private network, the address of the terminal in the public network for sending media streams, the method comprises: receiving, by the terminal in the private network, an Open Media Channel Ack (OMC Ack) signaling from the terminal in the public network; andstarting a timer. 3. The method according to claim 2, wherein a time interval of the timer is shorter than a time for which the terminal in the private network disconnects automatically when no code stream is received. 4. The method according to claim 1, wherein the terminal of the private network performs interaction through an extension field in a protocol message when the terminal of the private network sends a request message to the terminal in the public network. 5. The method according to claim 4, wherein the protocol is a one of H.323 protocol or SIP protocol. 6. A terminal in a private network configured to obtain media streams from a terminal in a public network, the terminal comprising a processor configured to implement a method comprising:acquiring an address of a terminal in the public network for sending media streams;sending a redirect packet to the terminal in the public network in which a destination address of the redirect packet is the address of the terminal in the public network for sending media streams;receiving the media streams from the terminal in the public network; andwherein the terminal in the private network sends the redirect packets periodically to refresh timeout time for a mapping relationship, wherein the mapping relationship is established between a source address in the redirect packet before a replacement and a common address in the redirect packet after the replacement. 7. A terminal in a private network configured to obtain media streams from a terminal in a public network, the terminal comprising a processor configured to implement a method comprising:acquiring an address of a terminal in the public network for sending media streams;sending a redirect packet to the terminal in the public network in which a destination address of the redirect packet is the address of the terminal in the public network for sending media streams;receiving the media streams from the terminal in the public network; andwherein the terminal in the private network sends the redirect packets periodically to the terminal in the public network via an address translating device, to make the address translating device refresh timeout time for a mapping relationship, wherein the mapping relationship is established between a source address in the redirect packet before a replacement and a common address in the redirect packet after the replacement.

이 특허에 인용된 특허 (31) 인용/피인용 타임라인 분석

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Keith Franklin Falck ; Chinmei Chen Lee, Arrangement of delivering internet protocol datagrams for multimedia services to the same server.
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Fukushima, Satoru; Kawai, Kensuke; Tsuchiya, Yasuhiro; Iwasaki, Yasutaka, Communication device and transit device having a call-hold function and a method for controlling the function.
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Fujino Nobutsugu (Kawasaki JPX), Communication method and communications control apparatus in circuit switching network.
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Adams, Greg; Cordell, Peter; Davies, Steven Gareth; Gray, Steven; Reed, Steven; Scott, Barry, Communication systems for traversing firewalls and network address translation (NAT) installations.
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Kunze, Aaron R.; Edwards, Jim W.; Dreke, Christian, Connections of nodes on different networks.
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Xu,Chen; Pan,Huang Ming; Cheng,Shih An; Huang,Jing Yao, Firewall penetration system and method for real time media communications.
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Wootton Bruce Anthony ; Colvin William G.,CAX, Internet protocol filter.
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Biswas,Kaushik P.; Jayasenan,Siva S.; Somasundaram,Mahadev; Denny,Mark A., Mechanisms for providing stateful NAT support in redundant and asymetric routing environments.
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McPherson, John, Method and apparatus for dynamic allocation of private address space based upon domain name service queries.
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Leung,Nikolai K. N.; Rezaiifar,Ramin, Method and apparatus for processing internet protocol transmissions.
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Swander,Brian D.; Dixon,William H., Method and apparatus for traversing a translation device with a security protocol.
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Shah,Tushar Ramesh; Kutac,Gregory Scott, Method and apparatus for voice over IP network address translation.
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Borella, Michael S.; Grabelsky, David, Method and system for address server redirection for multiple address networks.
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Chitturi, Ajay P.; Davis, Arlie L.; Kumar, Deepak; Kleyman, Ilya A., Method and system for proxying telephony messages.
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Ju, Paul Pay-Lun; Jan, Seaway, Method for communicating audio data in a packet switched network.
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Liu,Fu Hua; Ju,Paul Pay Lun; Chang,Chen Huei, Method for communicating audio data in a packet switched network.
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Michael Flynn Thomas, Methods and systems for call forwarding.
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Agrawal, Prathima; Chen, Jyh-Cheng, Mobility management utilizing active address propagation.
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Chuang,Chenming, Network address conversion system and the method thereof.
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Kong,Won Keun, Network address conversion system for enabling access to a node having a private IP address, a method therefor, and a recording medium for recording the method.
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Takeda,Yutaka; Boiri,Kamal Youssef, Peer-to-peer (P2P) connection despite network address translators (NATs) at both ends.
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Lim,Raymond Marcelino Manese; Ferguson,Dennis C.; Libby,Jeffrey Glenn, Redirect checking in a network device.
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Wilson, Ian, Redirection to a virtual router.
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Perlman Radia Joy ; Kirby Alan J. ; Backes Floyd J. ; Kaufman Charles W., Router using multiple hop redirect messages to enable bridge like data forwarding.
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D'Souza,Maurice G., Soft switch using distributed firewalls for load sharing voice-over-IP traffic in an IP network.
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Jayasenan,Siva S.; Sullenberger,Mike; Denny,Mark; Venkateshaiah,Murali, Stateful network address translation protocol implemented over a data network.
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Panburana,Pandit; Floryanzia,Tyrone D.; Miles,Michael Gregg, Symmetrical codec selection in an asymmetrical codec environment.
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Liu, Fu-Hua; Cheng, Shih-An; Chang, Chen-Huei; Lee, Chih-Ping, System and method for determining a connectionless communication path for communicating audio data through an address and port translation device.
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[미국특허] Method of implementing traversal of multimedia protocols through network address translation device 원문보기