US20140344893A1 - Remote Access to Streaming Video - Google Patents
Remote Access to Streaming Video Download PDFInfo
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- US20140344893A1 US20140344893A1 US14/214,460 US201414214460A US2014344893A1 US 20140344893 A1 US20140344893 A1 US 20140344893A1 US 201414214460 A US201414214460 A US 201414214460A US 2014344893 A1 US2014344893 A1 US 2014344893A1
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- client device
- remote access
- area network
- media server
- remote
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
- H04L63/101—Access control lists [ACL]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4126—The peripheral being portable, e.g. PDAs or mobile phones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
- H04N21/2221—Secondary servers, e.g. proxy server, cable television Head-end being a cable television head-end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25808—Management of client data
- H04N21/25816—Management of client data involving client authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25808—Management of client data
- H04N21/25841—Management of client data involving the geographical location of the client
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/43622—Interfacing an external recording device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/1036—Signalling gateways at the edge
Definitions
- the present disclosure relates to the field of digital video recorders, particularly a system for providing a remote client device with access to streaming or downloadable video from a media server.
- DVRs digital video recorders
- Consumers can be provided with access to media content stored on media servers such as DVRs by streaming or downloading media files from the media server to a client device.
- media servers such as DVRs
- the client device is located on a different network than the media server, such as when the client device is away from home and is not connected to a home local area network on which the media server is connected, it can be unclear whether the client device is authorized to communicate with and exchange data with the media server on the local area network remotely through the internet or other wide area network. Additionally, it can be unclear whether or not the particular media content requested by a remote client device is authorized to be streamed to or downloaded by the requesting remote client device.
- What is needed is a method of authorizing a remote client device connected to a wide area network to communicate with a media server on a local area network through a residential gateway.
- the remote client device can submit a request to a remote access control server, which in turn can request that a residential gateway connected to the media server open temporary WAN ports for the remote client device.
- the media server can use one or more restriction lists to determine whether or not the requested media content is authorized to be streamed to or downloaded by the requesting remote client device.
- the present disclosure provides a method of granting a client device remote access to a media server after receiving a remote access request at a remote access control server from a remote client device over a wide area network by receiving an opened port list at the remote access control server from the media server over the wide area network, the opened port list describing one or more wide area network ports opened at a residential gateway operating a local area network to which the media server is connected, and transmitting the opened port list and a network address of the residential gateway to the remote client device from the remote access control server, such that the remote client device can communicate with the media server on the local area network through the one or more wide area network ports opened at the residential gateway.
- FIG. 1 depicts an exemplary embodiment of a system for remotely streaming and/or transferring media content between a Media Server and a Client Device securely through a residential gateway connected to the Media Server.
- FIG. 2 depicts a process for a Client Device to request remote access to a Media Server on a LAN when the Client Device is not connected to the LAN.
- FIG. 3 depicts exemplary embodiments of restriction lists.
- FIG. 1 depicts an exemplary embodiment of a system for remotely streaming and/or transferring media content between a Media Server 100 and a Client Device 102 securely through a residential gateway 104 connected to the Media Server 100 .
- a Media Server 100 can be a device, system or application such as a home media gateway, digital video recorder, or any other server or device that records, hosts, and/or transmits media content to other devices.
- a Media Server 100 can be a home media gateway that can receive and/or record television broadcasts, and can transmits received and/or recorded video to one or more televisions in a home and/or to one or more Client Devices 102 .
- a Client Device 102 can be a mobile phone, tablet computer, computer, gaming device, personal media device, or any other device that can stream or receive media content for playback on the Client Device 102 .
- the residential gateway 104 can manage, maintain, and/or provide access to a local area network (LAN) within a home or other location.
- a residential gateway 104 can be a router, firewall, access point, modem and/or any other device or component that operates and/or provides access to a LAN.
- the residential gateway 104 can be a router, modem, or other device provided by a telecommunications service provider, such as an entity that also provided a user with the Media Server 100 , that is configured to operate a LAN within the user's home, office, or other location.
- the residential gateway 104 can be provided by a user as part of an existing LAN within the user's home, office, or other location.
- the Media Server 100 can be in data communication with the LAN, such that the Media Server 100 can send and/or receive data over the LAN using TCP/IP or other protocols.
- a Media Server 100 connected to the LAN can transmit media content to one or more Client Devices 102 when the Client Devices 102 are connected directly to the LAN through a wired or wireless connection.
- many residential gateways 104 prevent or limit access to LANs from external devices through firewalls or network address translation/network address and port translation (NAT/NAPT).
- NAT/NAPT network address translation/network address and port translation
- a Client Device 102 that is not connected to the LAN can be precluded from obtaining media content from the Media Server 100 on the LAN unless the Client Device 102 connects to the residential gateway 104 through the processes described below.
- a remote Client Device 102 can connect to a residential gateway 104 through a Wide Area Network (WAN) to securely request and receive media content from a Media Server 100 connected to a LAN within in a particular home, even when the remote Client Device 102 is located outside that particular home and is not connected to that home's LAN.
- WAN Wide Area Network
- FIG. 2 depicts a process for a Client Device 102 to request remote access to a Media Server 100 on a LAN when the Client Device 102 is not connected to the LAN.
- a Client Device 102 can transmit a remote access request 108 to a Remote Access Control Server 106 .
- the data connection between the Client Device 102 and the Remote Access Control Server 106 can be established as a secure connection, such as a two-way Secure Sockets Layer (SSL) connection secured for Denial of Service (DOS) mitigation.
- SSL Secure Sockets Layer
- the remote access request 108 sent from a Client Device 102 to the Remote Access Control Server 106 can be a message that requests that the Client Device 102 be provided with access to a Media Server 100 through a residential gateway 104 connected to the Media Server 100 .
- the remote access request 108 can request a list of WAN ports that can be used to communicate with the Media Server 100 through the residential gateway 104 .
- the remote access request 108 can further include a request for a network location, such as an IP address or URL, for the residential gateway 104 , although in other embodiments the Client Device 102 can already know the network location of the residential gateway 104 .
- the remote access request 108 can also include a Client ID that uniquely identifies the Client Device 102 submitting the remote access request 108 .
- the Remote Access Control Server 106 can determine whether the Client ID in the remote access request 108 appears on a device authorization list.
- the Remote Access Control Server 106 can maintain one or more device authorization lists.
- a device authorization list can include the Client IDs of Client Devices 102 that have been authorized to communicate remotely with a particular Media Server 100 .
- a cable television subscriber who has been provided with a Media Server 100 for use in his home can request that his mobile phone be authorized to obtain media content from that Media Server 100 , and the Client ID for that mobile phone can be stored in a device authorization list associated with the subscriber's Media Server 100 on the Remote Access Control Server 106 .
- the Remote Access Control Server 106 can proceed to step 208 . If the Client ID contained in the remote access request 108 does not appear on the authorization list, the Remote Access Control Server 106 can reject the remote access request 108 at step 206 .
- the Remote Access Control Server 106 can further determine whether the Media Server 100 is currently accessible and available to stream media content to the requesting Client Device 102 .
- the Media Server 100 can periodically send status messages to the Remote Access Control Server 106 indicating that the Media Server 100 is turned on and is available for media transfer, or send status messages if the Media Server's status changes.
- the Remote Access Control Server 106 if the Remote Access Control Server 106 has not received a status message indicating that the Media Server 100 is available within a predetermined period of time, an error message can be sent to the Client Device in response to its remote access request 108 .
- the data connection between the Media Server 100 and the Remote Access Control Server 106 can be established as a secure connection, such as a two-way Secure Sockets Layer (SSL) connection secured for Denial of Service (DOS) mitigation.
- SSL Secure Sockets Layer
- a Media Server 100 can further include information in its status messages to the Remote Access Control Server 106 indicating its serial number or other identifier, channel identifiers for channels that the Media Server's tuners are currently tuned to, network information of the LAN, IP address or URLs for the residential gateway 104 , a list of opened ports, Client IDs of Client Devices 102 that have been authorized to communicate with the Media Server 100 , or any other information.
- the authorization list used during step 206 can be generated by the identities of authorized Client Devices 102 indicated in a Media Server's status message.
- status messages sent from the Media Server 100 to the Remote Access Control Server 106 can be optional, and/or the Remote Access Control Server 106 does not check for such status messages before moving to the next step.
- the Remote Access Control Server 106 can submit a port request 110 to the residential gateway 104 associated with the Media Server 100 .
- the port request 110 can request that the residential gateway 104 open WAN ports for the requesting Client Device 102 .
- the Remote Access Control Server 106 can be in asynchronous contact with the residential gateway 104 .
- the Remote Access Control Server 106 can use TR-069 signaling to interface with the residential gateway via a TR-069 Auto Configuration Server (ACS) to request that the residential gateway 104 open WAN ports for the Client Device 102 .
- ACS Auto Configuration Server
- the residential gateway 104 can open WAN ports, such that the Client Device 102 can use the WAN ports to communicate over the WAN through the residential gateway 104 with the Media Server 100 through TCP/IP-based messaging or any other messaging protocol.
- the opened WAN ports can be temporary ports referred to as pinholes that are mapped to LAN ports associated with the Media Server 100 .
- the residential gateway 104 can return an Opened Port List 112 that lists the opened WAN ports to the Remote Access Control Server 106 .
- an Opened Port List 112 can be a part of a periodic status message sent from the Media Server 100 to the Remote Access Control Server 106 as described above.
- the residential gateway 104 can open a triplet of WAN ports, with each of the three WAN ports opened for a particular type of signaling, as will be discussed below.
- the WAN ports can be randomly selected, and can be closed after the media content streaming or transfer has completed. In some embodiments, randomly selected WAN ports can be selected from within a preconfigured range of ports.
- the second and third WAN ports can be offset by one and two integers respectively from the WAN port randomly selected as the first WAN port.
- the first WAN port is selected as port 6000
- the second and third WAN ports can respectively be 6001 and 6002 .
- all three WAN ports can be selected at random, or can be selected in any other manner. In still other embodiments, more or less than three WAN ports can be opened by the residential gateway as desired.
- a first WAN port can be opened at the residential gateway 104 to allow web service signaling between the Client Device 102 and the Media Server 100 .
- this first pinhole can be temporarily mapped to HTTPS port 443 , or any other desired port that allows communication with the Media Server 100 .
- a second WAN port can be opened at the residential gateway 104 to allow media requests, content, playlists, and/or any other content or request to be exchanged between the Client Device 102 and the Media Server 100 .
- HTTP Live Streaming (HLS) playlists, chunks of media content, requests for complete recordings of media content, and/or any other content request can be passed through the second WAN port.
- a third WAN port can be opened at the residential gateway 104 to allow security or digital rights management communications to be exchanged between the Client Device 102 and the Media Server 100 .
- information regarding copy protection schemes such as DTCP-IP (Digital Transmission Content Protection over Internet Protocol), SecureMedia-HN, or any other digital rights management scheme, can be exchanged through the third WAN port between the Client Device 102 and Media Server 100 .
- the Remote Access Control Server 106 can return Media Server Access Information 114 to the Client Device 102 that submitted the remote access request 108 .
- the Media Server Access Information 114 can include list of the opened WAN ports obtained from the Opened Port List 112 . If the remote access request 108 included a request for the residential gateway's network location, the Media Server Access Information 114 can also include an IP address or URL for the residential gateway 104 . Alternatively, if the Media Server 100 or residential gateway 104 was not found, or was not available, the Remote Access Control Server 106 can return an error message to the requesting Client Device 102 .
- the Client Device 102 can use the information in the Media Server Access Information 114 , such as the residential gateway's IP address or URL and/or list of opened WAN ports, to submit a media content request 116 to the Media Server 100 through the residential gateway 104 .
- the Client Device 102 can request a stream of a recorded program saved on a hard drive at the Media Server 100 , a stream of a live broadcast being received by the Media Server 100 , a transfer of a completed recording such that a copy of the completed recording is transferred to and stored on the Client Device 102 for local playback, or any other request for media content.
- the media content request 116 from the Client Device 102 can indicate that the media content request 116 originated from a remote Client Device 102 not connected to the LAN, such that the Media Server 100 can determine that it should use adaptive transcoding when establishing remote streaming service with the Client Device 102 to account for variable network conditions.
- the residential gateway 104 can indicate that the media content request 116 was received through a WAN port opened for remote access, or the Media Server 100 can determine that the media content request 116 passed through an opened WAN port, thereby indicating that the Client Device 102 is not connected to the LAN and adaptive transcoding should be used.
- the Media Server 100 can return the requested media content 118 to the Client Device 102 through the opened WAN ports at the residential gateway 104 .
- one or more restriction lists 300 can be used by the Media Server 100 or residential gateway 104 to determine if the requested media content 118 can be provided to the requesting Client Device 102 , and how the media content 118 can be used by the Client Device 102 .
- FIG. 3 depicts exemplary embodiments of restriction lists 300 .
- the Media Server 100 or residential gateway 104 can use one or more restriction lists 300 when providing media content 118 to a remote Client Device 102 .
- a restriction list 300 can describe one or more control parameters that can describe permissions and/or restrictions indicating how a Client Device 102 can use media content 118 .
- a restriction list 300 can include control parameters on a per-channel basis that indicate how media content 118 received from a particular channel that the Media Server 100 is or was tuned to can be transferred to and/or used by remote Client Devices 102 .
- Restriction lists 300 can include a default configuration list 302 , content expiration list 304 , local transferred content blacklist 306 , copy restriction list 308 , and/or remote access whitelist 310 .
- a default configuration list 302 can describe a default maximum number of Client Devices 102 that can be provided with access to the media content 118 .
- a default configuration list 302 can also describe a maximum limit of copies that are authorized to be made of or streamed of the media content 118 .
- a default configuration list 302 can also describe a default content expiration period, such that the locally stored copy of the media content 118 can expire and become unplayable after the default content expiration period has ended.
- a content expiration list 304 can describe content expiration periods for particular instances of media content 118 that can override a default content expiration period found in a default configuration list 302 .
- a particular program recorded by a Media Server 100 can be set to expire earlier than most other programs that expire according to a default content expiration period.
- a Client Device 102 can use one or more keys provided by the Media Server 100 to decrypt encrypted media content 118 , and the keys can expire after the duration of the content expiration period described by the default configuration list 302 or content expiration list 304 .
- a local transferred content blacklist 306 can describe the identities of media content 118 for which a copy is not authorized to be transferred to local storage in a Client Device 102 , such that the Client Device 102 can stream that media content 118 but not save the media content 118 in its entirety to its local storage for later local playback.
- media content 118 listed on a local transferred content blacklist 306 can be copied and/or transferred to a Client Device 102 that is directly connected to the Media Server 100 through a LAN, but such copying can be precluded when the Client Device 102 is connected to the Media Server 100 remotely through a WAN.
- transfer and/or copying media content 118 can be unrestricted by default unless an identifier for the media content 118 appears on a local transferred content blacklist 306 .
- a copy restriction list 308 can describe a maximum limit of copies that are authorized to be made of or streamed of one or more particular instances of media content 118 or media content 118 from a particular channel, when that maximum limit differs from a default maximum copy limit described in the default configuration list 302 .
- the maximum limit of copies in the copy restriction list 308 can be decreased, such that the copy restriction list 308 describes the number of remaining authorized copies that can be made or streamed.
- media content 118 can be “checked out” by downloading a copy to a Client Device's local storage or streaming to the Client Device 102 and “returned” by deleting the media content 118 from the Client Device's local storage or ceasing a stream, and in these embodiments the number of remaining authorized copies can be increased in the copy restriction list 308 when a copy is returned or a stream is ceased, such that it is no longer checked out by a Client Device 102 . If the copy restriction list 308 indicates that no more copies of the media content 118 are authorized, then further requests from a Client Device 102 for a copy or stream of the media content 118 can be denied, and, in some embodiments, the media content 118 can be deleted from the Media Server 100 .
- a remote access whitelist 310 can describe rights permissions for an instance of media content 118 and/or some or all media content 118 received from a particular channel.
- a remote access whitelist 310 can indicate whether live and/or recorded media content 118 received from a particular channel by a Media Server 100 is approved for streaming to a remote Client Device 102 , whether there is a limit on the number of concurrent streams for an instance of media content 118 and/or media content 118 from a particular channel, and/or whether a copy of the media content 118 is authorized to be sent to a requesting Client Device's local storage for later local playback.
- a remote access whitelist 310 can include remote access permissions for a particular channel, indicating that media content 118 the Media Streamer receives live from that channel, or has previously recorded from that channel, can be streamed to one or more remote Client Devices 102 in response to a media content request 116 .
- the remote access whitelist 310 can indicate that streaming of media content 118 from a particular channel is authorized, and can include a maximum number of concurrent streams for media content 118 from that channel that is authorized to be streamed to remote Client Devices 102 .
- the maximum number of concurrent streams of media content 118 listed for a channel can refer to a maximum number of streams of media content 118 from all channels, including the requested one.
- the default number of concurrent streams can be set to one, but the number of authorized concurrent streams can be set to any desired number for any particular instance of media content 118 and/or all media content from any particular channel to which the Media Server is or has been tuned or to a desired number of authorized concurrent streams of media content 118 from all channels, including the requested one.
- the remote access whitelist 310 indicates that only one concurrent stream for media content 118 from a particular channel is allowed, the first authorized Client Device 102 to request that media content 118 can be provided with the stream, while other Client Devices can be precluded from accessing a stream of media content 118 from that channel until the first Client Device 102 ceases accessing the stream.
- the Media Server 100 can transfer a copy of the media content 118 to the remote Client Device 102 .
- the Media Server can check a copy restriction list 308 to determine whether a maximum copy limit has been reached for the requested media content 118 before transferring the media content 118 to the requesting remote Client Device 102 .
Abstract
Description
- This application claims priority under 35 U.S.C. §119(e) from earlier filed U.S. Provisional Application Ser. No. 61/801,291, filed Mar. 15, 2013, which is hereby incorporated by reference.
- The present disclosure relates to the field of digital video recorders, particularly a system for providing a remote client device with access to streaming or downloadable video from a media server.
- Consumers have come to enjoy accessing media content on-demand on non-television devices, such as mobile phones or tablet computers, by streaming media content over the internet or downloading media content to the device. Consumers also enjoy watching television broadcasts, either in real time or through digital video recorders (DVRs) whereby broadcasts can be recorded and viewed at a later time.
- Consumers can be provided with access to media content stored on media servers such as DVRs by streaming or downloading media files from the media server to a client device. However, when the client device is located on a different network than the media server, such as when the client device is away from home and is not connected to a home local area network on which the media server is connected, it can be unclear whether the client device is authorized to communicate with and exchange data with the media server on the local area network remotely through the internet or other wide area network. Additionally, it can be unclear whether or not the particular media content requested by a remote client device is authorized to be streamed to or downloaded by the requesting remote client device.
- What is needed is a method of authorizing a remote client device connected to a wide area network to communicate with a media server on a local area network through a residential gateway. The remote client device can submit a request to a remote access control server, which in turn can request that a residential gateway connected to the media server open temporary WAN ports for the remote client device. The media server can use one or more restriction lists to determine whether or not the requested media content is authorized to be streamed to or downloaded by the requesting remote client device.
- In one embodiment, the present disclosure provides a method of granting a client device remote access to a media server after receiving a remote access request at a remote access control server from a remote client device over a wide area network by receiving an opened port list at the remote access control server from the media server over the wide area network, the opened port list describing one or more wide area network ports opened at a residential gateway operating a local area network to which the media server is connected, and transmitting the opened port list and a network address of the residential gateway to the remote client device from the remote access control server, such that the remote client device can communicate with the media server on the local area network through the one or more wide area network ports opened at the residential gateway.
- Further details of the present invention are explained with the help of the attached drawings in which:
-
FIG. 1 depicts an exemplary embodiment of a system for remotely streaming and/or transferring media content between a Media Server and a Client Device securely through a residential gateway connected to the Media Server. -
FIG. 2 depicts a process for a Client Device to request remote access to a Media Server on a LAN when the Client Device is not connected to the LAN. -
FIG. 3 depicts exemplary embodiments of restriction lists. -
FIG. 1 depicts an exemplary embodiment of a system for remotely streaming and/or transferring media content between aMedia Server 100 and aClient Device 102 securely through aresidential gateway 104 connected to the MediaServer 100. AMedia Server 100 can be a device, system or application such as a home media gateway, digital video recorder, or any other server or device that records, hosts, and/or transmits media content to other devices. By way of a non-limiting example, aMedia Server 100 can be a home media gateway that can receive and/or record television broadcasts, and can transmits received and/or recorded video to one or more televisions in a home and/or to one ormore Client Devices 102. AClient Device 102 can be a mobile phone, tablet computer, computer, gaming device, personal media device, or any other device that can stream or receive media content for playback on theClient Device 102. - The
residential gateway 104 can manage, maintain, and/or provide access to a local area network (LAN) within a home or other location. Aresidential gateway 104 can be a router, firewall, access point, modem and/or any other device or component that operates and/or provides access to a LAN. In some embodiments theresidential gateway 104 can be a router, modem, or other device provided by a telecommunications service provider, such as an entity that also provided a user with the Media Server 100, that is configured to operate a LAN within the user's home, office, or other location. In other embodiments theresidential gateway 104 can be provided by a user as part of an existing LAN within the user's home, office, or other location. TheMedia Server 100 can be in data communication with the LAN, such that theMedia Server 100 can send and/or receive data over the LAN using TCP/IP or other protocols. - In some situations and/or embodiments, a
Media Server 100 connected to the LAN can transmit media content to one ormore Client Devices 102 when theClient Devices 102 are connected directly to the LAN through a wired or wireless connection. However, manyresidential gateways 104 prevent or limit access to LANs from external devices through firewalls or network address translation/network address and port translation (NAT/NAPT). In these situations, aClient Device 102 that is not connected to the LAN can be precluded from obtaining media content from theMedia Server 100 on the LAN unless theClient Device 102 connects to theresidential gateway 104 through the processes described below. By way of a non-limiting example, aremote Client Device 102 can connect to aresidential gateway 104 through a Wide Area Network (WAN) to securely request and receive media content from aMedia Server 100 connected to a LAN within in a particular home, even when theremote Client Device 102 is located outside that particular home and is not connected to that home's LAN. -
FIG. 2 depicts a process for aClient Device 102 to request remote access to aMedia Server 100 on a LAN when theClient Device 102 is not connected to the LAN. Atstep 202, aClient Device 102 can transmit aremote access request 108 to a RemoteAccess Control Server 106. In some embodiments, the data connection between theClient Device 102 and the Remote Access Control Server 106 can be established as a secure connection, such as a two-way Secure Sockets Layer (SSL) connection secured for Denial of Service (DOS) mitigation. - The
remote access request 108 sent from aClient Device 102 to the Remote Access Control Server 106 can be a message that requests that theClient Device 102 be provided with access to aMedia Server 100 through aresidential gateway 104 connected to theMedia Server 100. In particular, theremote access request 108 can request a list of WAN ports that can be used to communicate with theMedia Server 100 through theresidential gateway 104. In some embodiments, theremote access request 108 can further include a request for a network location, such as an IP address or URL, for theresidential gateway 104, although in other embodiments theClient Device 102 can already know the network location of theresidential gateway 104. Theremote access request 108 can also include a Client ID that uniquely identifies theClient Device 102 submitting theremote access request 108. - At
step 204, the Remote Access Control Server 106 can determine whether the Client ID in theremote access request 108 appears on a device authorization list. The Remote Access Control Server 106 can maintain one or more device authorization lists. A device authorization list can include the Client IDs ofClient Devices 102 that have been authorized to communicate remotely with aparticular Media Server 100. By way of a non-limiting example, a cable television subscriber who has been provided with aMedia Server 100 for use in his home can request that his mobile phone be authorized to obtain media content from thatMedia Server 100, and the Client ID for that mobile phone can be stored in a device authorization list associated with the subscriber'sMedia Server 100 on the Remote Access Control Server 106. If the Client ID contained in theremote access request 108 appears on the authorization list, the Remote Access Control Server 106 can proceed tostep 208. If the Client ID contained in theremote access request 108 does not appear on the authorization list, the Remote Access Control Server 106 can reject theremote access request 108 atstep 206. - In some embodiments, the Remote Access Control Server 106 can further determine whether the Media Server 100 is currently accessible and available to stream media content to the requesting
Client Device 102. By way of a non-limiting example, in some embodiments theMedia Server 100 can periodically send status messages to the Remote Access Control Server 106 indicating that theMedia Server 100 is turned on and is available for media transfer, or send status messages if the Media Server's status changes. In these embodiments, if the Remote Access Control Server 106 has not received a status message indicating that theMedia Server 100 is available within a predetermined period of time, an error message can be sent to the Client Device in response to itsremote access request 108. In some embodiments, the data connection between theMedia Server 100 and the Remote Access Control Server 106 can be established as a secure connection, such as a two-way Secure Sockets Layer (SSL) connection secured for Denial of Service (DOS) mitigation. - In some embodiments, a
Media Server 100 can further include information in its status messages to the Remote Access Control Server 106 indicating its serial number or other identifier, channel identifiers for channels that the Media Server's tuners are currently tuned to, network information of the LAN, IP address or URLs for theresidential gateway 104, a list of opened ports, Client IDs ofClient Devices 102 that have been authorized to communicate with theMedia Server 100, or any other information. By way of a non-limiting example, the authorization list used duringstep 206 can be generated by the identities of authorizedClient Devices 102 indicated in a Media Server's status message. In alternate embodiments, status messages sent from theMedia Server 100 to the Remote Access Control Server 106 can be optional, and/or the Remote Access Control Server 106 does not check for such status messages before moving to the next step. - At
step 208, if theremote access request 108 was confirmed duringstep 204 to include a Client ID that appears on a device authorization list associated with theMedia Server 100, the Remote Access Control Server 106 can submit aport request 110 to theresidential gateway 104 associated with theMedia Server 100. Theport request 110 can request that theresidential gateway 104 open WAN ports for the requestingClient Device 102. In some embodiments, the Remote Access Control Server 106 can be in asynchronous contact with theresidential gateway 104. By way of a non-limiting example, in some embodiments the Remote Access Control Server 106 can use TR-069 signaling to interface with the residential gateway via a TR-069 Auto Configuration Server (ACS) to request that theresidential gateway 104 open WAN ports for theClient Device 102. - At
step 210, theresidential gateway 104 can open WAN ports, such that theClient Device 102 can use the WAN ports to communicate over the WAN through theresidential gateway 104 with the Media Server 100 through TCP/IP-based messaging or any other messaging protocol. In some embodiments, the opened WAN ports can be temporary ports referred to as pinholes that are mapped to LAN ports associated with theMedia Server 100. Theresidential gateway 104 can return an OpenedPort List 112 that lists the opened WAN ports to the Remote Access Control Server 106. In alternate embodiments, an OpenedPort List 112 can be a part of a periodic status message sent from theMedia Server 100 to the Remote Access Control Server 106 as described above. - In some embodiments, the
residential gateway 104 can open a triplet of WAN ports, with each of the three WAN ports opened for a particular type of signaling, as will be discussed below. The WAN ports can be randomly selected, and can be closed after the media content streaming or transfer has completed. In some embodiments, randomly selected WAN ports can be selected from within a preconfigured range of ports. In some embodiments, the second and third WAN ports can be offset by one and two integers respectively from the WAN port randomly selected as the first WAN port. By way of a non-limiting example, when the first WAN port is selected as port 6000, the second and third WAN ports can respectively be 6001 and 6002. In other embodiments, all three WAN ports can be selected at random, or can be selected in any other manner. In still other embodiments, more or less than three WAN ports can be opened by the residential gateway as desired. - In embodiments in which three WAN ports are opened, a first WAN port can be opened at the
residential gateway 104 to allow web service signaling between theClient Device 102 and theMedia Server 100. In some embodiments, this first pinhole can be temporarily mapped to HTTPS port 443, or any other desired port that allows communication with theMedia Server 100. - In these embodiments, a second WAN port can be opened at the
residential gateway 104 to allow media requests, content, playlists, and/or any other content or request to be exchanged between theClient Device 102 and theMedia Server 100. By way of a non-limiting example, HTTP Live Streaming (HLS) playlists, chunks of media content, requests for complete recordings of media content, and/or any other content request, can be passed through the second WAN port. - In these embodiments, a third WAN port can be opened at the
residential gateway 104 to allow security or digital rights management communications to be exchanged between theClient Device 102 and theMedia Server 100. By way of non-limiting examples, information regarding copy protection schemes such as DTCP-IP (Digital Transmission Content Protection over Internet Protocol), SecureMedia-HN, or any other digital rights management scheme, can be exchanged through the third WAN port between theClient Device 102 andMedia Server 100. - At
step 212, the RemoteAccess Control Server 106 can return MediaServer Access Information 114 to theClient Device 102 that submitted theremote access request 108. The MediaServer Access Information 114 can include list of the opened WAN ports obtained from the OpenedPort List 112. If theremote access request 108 included a request for the residential gateway's network location, the MediaServer Access Information 114 can also include an IP address or URL for theresidential gateway 104. Alternatively, if theMedia Server 100 orresidential gateway 104 was not found, or was not available, the RemoteAccess Control Server 106 can return an error message to the requestingClient Device 102. - At
step 214, theClient Device 102 can use the information in the MediaServer Access Information 114, such as the residential gateway's IP address or URL and/or list of opened WAN ports, to submit amedia content request 116 to theMedia Server 100 through theresidential gateway 104. By way of a non-limiting example, theClient Device 102 can request a stream of a recorded program saved on a hard drive at theMedia Server 100, a stream of a live broadcast being received by theMedia Server 100, a transfer of a completed recording such that a copy of the completed recording is transferred to and stored on theClient Device 102 for local playback, or any other request for media content. - In some embodiments, the
media content request 116 from theClient Device 102 can indicate that themedia content request 116 originated from aremote Client Device 102 not connected to the LAN, such that theMedia Server 100 can determine that it should use adaptive transcoding when establishing remote streaming service with theClient Device 102 to account for variable network conditions. In alternate embodiments, theresidential gateway 104 can indicate that themedia content request 116 was received through a WAN port opened for remote access, or theMedia Server 100 can determine that themedia content request 116 passed through an opened WAN port, thereby indicating that theClient Device 102 is not connected to the LAN and adaptive transcoding should be used. - At
step 216, theMedia Server 100 can return the requestedmedia content 118 to theClient Device 102 through the opened WAN ports at theresidential gateway 104. In some embodiments, one or more restriction lists 300 can be used by theMedia Server 100 orresidential gateway 104 to determine if the requestedmedia content 118 can be provided to the requestingClient Device 102, and how themedia content 118 can be used by theClient Device 102. -
FIG. 3 depicts exemplary embodiments of restriction lists 300. As mentioned above, in some embodiments and/or situations theMedia Server 100 orresidential gateway 104 can use one or more restriction lists 300 when providingmedia content 118 to aremote Client Device 102. Arestriction list 300 can describe one or more control parameters that can describe permissions and/or restrictions indicating how aClient Device 102 can usemedia content 118. By way of a non-limiting example, arestriction list 300 can include control parameters on a per-channel basis that indicate howmedia content 118 received from a particular channel that theMedia Server 100 is or was tuned to can be transferred to and/or used byremote Client Devices 102. Restriction lists 300 can include a default configuration list 302,content expiration list 304, local transferredcontent blacklist 306,copy restriction list 308, and/orremote access whitelist 310. - A default configuration list 302 can describe a default maximum number of
Client Devices 102 that can be provided with access to themedia content 118. A default configuration list 302 can also describe a maximum limit of copies that are authorized to be made of or streamed of themedia content 118. In embodiments and/or situations in which a copy of themedia content 118 is transferred to a Client Device's local memory for local playback at a later time, a default configuration list 302 can also describe a default content expiration period, such that the locally stored copy of themedia content 118 can expire and become unplayable after the default content expiration period has ended. - A
content expiration list 304 can describe content expiration periods for particular instances ofmedia content 118 that can override a default content expiration period found in a default configuration list 302. By way of a non-limiting example, a particular program recorded by aMedia Server 100 can be set to expire earlier than most other programs that expire according to a default content expiration period. - In some embodiments, a
Client Device 102 can use one or more keys provided by theMedia Server 100 to decryptencrypted media content 118, and the keys can expire after the duration of the content expiration period described by the default configuration list 302 orcontent expiration list 304. - A local transferred
content blacklist 306 can describe the identities ofmedia content 118 for which a copy is not authorized to be transferred to local storage in aClient Device 102, such that theClient Device 102 can stream thatmedia content 118 but not save themedia content 118 in its entirety to its local storage for later local playback. In some embodiments,media content 118 listed on a local transferredcontent blacklist 306 can be copied and/or transferred to aClient Device 102 that is directly connected to theMedia Server 100 through a LAN, but such copying can be precluded when theClient Device 102 is connected to theMedia Server 100 remotely through a WAN. In some embodiments, transfer and/or copyingmedia content 118 can be unrestricted by default unless an identifier for themedia content 118 appears on a local transferredcontent blacklist 306. - A
copy restriction list 308 can describe a maximum limit of copies that are authorized to be made of or streamed of one or more particular instances ofmedia content 118 ormedia content 118 from a particular channel, when that maximum limit differs from a default maximum copy limit described in the default configuration list 302. In some embodiments, each time a copy of recordedmedia content 118 is transferred by theMedia Server 100 to aClient Device 102 to be stored locally on theClient Device 102 for later local playback, or is being streamed to aClient Device 102, the maximum limit of copies in thecopy restriction list 308 can be decreased, such that thecopy restriction list 308 describes the number of remaining authorized copies that can be made or streamed. In some embodiments,media content 118 can be “checked out” by downloading a copy to a Client Device's local storage or streaming to theClient Device 102 and “returned” by deleting themedia content 118 from the Client Device's local storage or ceasing a stream, and in these embodiments the number of remaining authorized copies can be increased in thecopy restriction list 308 when a copy is returned or a stream is ceased, such that it is no longer checked out by aClient Device 102. If thecopy restriction list 308 indicates that no more copies of themedia content 118 are authorized, then further requests from aClient Device 102 for a copy or stream of themedia content 118 can be denied, and, in some embodiments, themedia content 118 can be deleted from theMedia Server 100. - A
remote access whitelist 310 can describe rights permissions for an instance ofmedia content 118 and/or some or allmedia content 118 received from a particular channel. Aremote access whitelist 310 can indicate whether live and/or recordedmedia content 118 received from a particular channel by aMedia Server 100 is approved for streaming to aremote Client Device 102, whether there is a limit on the number of concurrent streams for an instance ofmedia content 118 and/ormedia content 118 from a particular channel, and/or whether a copy of themedia content 118 is authorized to be sent to a requesting Client Device's local storage for later local playback. By way of a non-limiting example, aremote access whitelist 310 can include remote access permissions for a particular channel, indicating thatmedia content 118 the Media Streamer receives live from that channel, or has previously recorded from that channel, can be streamed to one or moreremote Client Devices 102 in response to amedia content request 116. - If the
remote access whitelist 310 indicates thatmedia content 118 can be streamed to aremote Client Device 102, then theMedia Server 100 can transmit a playlist and stream chunks of themedia content 118 to theremote Client Device 102 for remote viewing. If theremote access whitelist 310 indicates that there is a limit on the number of concurrent streams of themedia content 118 that can be transmitted to variousremote Client Devices 102, then theMedia Server 100 can determine whether the number of streams of thatmedia content 118 exceeds the maximum value and provide a newly requested stream to aClient Device 102 if the maximum number of streams has not been reached. By way of a non-limiting example, theremote access whitelist 310 can indicate that streaming ofmedia content 118 from a particular channel is authorized, and can include a maximum number of concurrent streams formedia content 118 from that channel that is authorized to be streamed toremote Client Devices 102. In other embodiments, the maximum number of concurrent streams ofmedia content 118 listed for a channel can refer to a maximum number of streams ofmedia content 118 from all channels, including the requested one. - In some embodiments, the default number of concurrent streams can be set to one, but the number of authorized concurrent streams can be set to any desired number for any particular instance of
media content 118 and/or all media content from any particular channel to which the Media Server is or has been tuned or to a desired number of authorized concurrent streams ofmedia content 118 from all channels, including the requested one. By way of a non-limiting example, if theremote access whitelist 310 indicates that only one concurrent stream formedia content 118 from a particular channel is allowed, the first authorizedClient Device 102 to request thatmedia content 118 can be provided with the stream, while other Client Devices can be precluded from accessing a stream ofmedia content 118 from that channel until thefirst Client Device 102 ceases accessing the stream. - If the
remote access whitelist 310 indicates that copying of themedia content 118 to a remote Client Device's local storage is approved, then theMedia Server 100 can transfer a copy of themedia content 118 to theremote Client Device 102. As discussed above, the Media Server can check acopy restriction list 308 to determine whether a maximum copy limit has been reached for the requestedmedia content 118 before transferring themedia content 118 to the requestingremote Client Device 102. - Although the invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, the invention as described and hereinafter claimed is intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the appended claims.
Claims (16)
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