Systems, methods, and media for controlling delivery of content
View Patent ↗Methods, systems, and computer readable media for controlling delivery of content are provided. In some embodiments, a system for controlling delivery of content is provided. The system includes processing circuitry configured to: transmit, to a server, a plurality of requests for blocks of the content; while at least some of the plurality of requests are still outstanding: detect a change of a service characteristic of a connection between the system and the server; determine a preferred number of outstanding requests; and cancel at least some of the requests from the plurality that are still outstanding based on the preferred number and a count of the requests from the plurality that are still outstanding.
1. A system for presenting media content using cached assets, the system comprising:
processing circuitry configured to:
transmit to a server via a connection a plurality of requests for blocks of a content, the plurality including a first request for a first block of the content and a second request for a second block of the content, where the connection with the server is established over one or more communications networks and comprises:
a bandwidth; and
a latency;
wherein the latency is based on a time taken for the server to process and respond to a given request for a block of content;
while the second request is still outstanding:
receive the first block of the content responsive to the first request;
determine a preferred number of outstanding requests, where the preferred number of outstanding requests is determined based on both the latency and the bandwidth of the connection and is evaluated using the following expressions:
preferred
number
of
requests
=
t
latency
t
transmission
+
1
t
transmission
=
block
size
bandwidth
where t latency is the latency, t transmission is the time for the block of content to be transmitted to the server, block size is the size of a request for the block of content, and bandwidth is the bandwidth; and
when the preferred number of outstanding requests is greater than the number of requests from the plurality that are currently outstanding, transmit a third request for a third block before the second block is received by the processing circuitry;
when the preferred number of outstanding requests is less than or equal to the number of requests from the plurality that are currently outstanding, transmit the third request after the second block is received by the processing circuitry.
2. The system of claim 1 , wherein:
the first request, the second request, and the third request are transmitted using an Open Systems Interconnect (OSI) application-layer protocol.
3. A method for controlling delivery of content, comprising:
transmitting, by a device to a server via a connection, a plurality of requests for blocks of a content, the plurality including a first request for a first block of the content and a second request for a second block of the content, where the connection with the server is established over one or more communication networks and comprises:
a bandwidth; and
a latency;
wherein the latency is based on a time taken for the server to process and respond to a given request for a block of content;
while the second request is still outstanding:
receiving the first block of the content responsive to the first request;
determining a preferred number of outstanding requests, where the preferred number of outstanding requests is determined based on both the latency and the bandwidth of the connection and is evaluated using the following expressions:
preferred
number
of
requests
=
t
latency
t
transmission
+
1
t
transmission
=
block
size
bandwidth
where t latency is the latency, t transmission is the time for the block of content to be transmitted to the server, block size is the size of a request for the block of content, and bandwidth is the bandwidth; and
when the preferred number of outstanding requests is greater than the number of requests from the plurality that are currently outstanding, transmitting a third request for a third block of the content before the second block is received at the device;
when the preferred number of outstanding requests is less than or equal to the number of requests from the plurality that are currently outstanding, transmitting the third request after the second block is received at the device.
4. The method of claim 3 , wherein the first request, the second request, and the third request are transmitted using an Open Systems Interconnect (OSI) application-layer protocol.
5. A non-transitory computer-readable medium containing computer-executable instructions that, when executed by a processing circuitry, cause the processing circuitry to perform a method for controlling delivery of content, the method comprising:
transmitting to a server via a connection a plurality of requests for blocks of a content, the plurality including a first request for a first block of the content and a second request for a second block of the content, where the connection with the server is established over one or more communications network and comprises:
a bandwidth; and
a latency;
wherein the latency is based on a time taken for the server to process and respond to a given request for a block of content;
while the second request is still outstanding, receiving the first block of the content responsive to the first request;
determining a preferred number of outstanding requests, where the preferred number of outstanding requests is determined based on both the latency and the bandwidth of the connection and is evaluated using the following expressions:
preferred
number
of
requests
=
t
latency
t
transmission
+
1
t
transmission
=
block
size
bandwidth
where t latency is the latency, t transmission is the time for the block of content to be transmitted to the server, block size is the size of a request for the block of content, and bandwidth is the bandwidth; and when the preferred number of outstanding requests is greater than the number of requests from the plurality that are currently outstanding, transmitting a third request for a third block of the content before the second block is received by the processing circuitry;
when the preferred number of outstanding requests is less than or equal to the number of requests from the plurality that are currently outstanding, transmitting the third request after the second block is received by the processing circuitry.
6. The non-transitory computer readable medium of claim 5 , wherein the first request, the second request, and the third request are transmitted using an Open Systems Interconnect (OSI) application-layer protocol.