Terrestrial broadcast market exchange network platform and broadcast augmentation channels for hybrid broadcasting in the internet age
A new television broadcast model called a Broadcast Market Exchange (BMX) eliminates the inefficiency in spectrum usage, providing maximum flexibility in delivering content through either VHF (for fixed location receiving devices) or UHF (optimized for mobile receiving devices) transmission/propagation. In conjunction with the BMX, a wireless communications system architecture is provided to enable a broadcast augmentation channel. The augmentation channel provides supplementation of the Quality of Service (QoS) of a one way User Datagram Protocol (UDP) delivery environment. The augmentation channel may be comprised of one or more physical delivery mechanisms (wired or wireless), but can be effectively unified for increasing QoS and or scalable levels of service (additional essence) to improve the user experience.
1. A system, comprising:
a broadcast gateway located in an Internet Protocol (IP) core network, wherein the broadcast gateway is configured to:
receive content from a plurality of content providers;
generate a system timestamp based on a time signal; and
generate a baseband signal including a user plane signal and a control plane signal, the user plane signal including the content from the plurality of content providers, and the control plane signal including the system timestamp; and
a plurality of broadcast modulators located in a Single Frequency Network (SFN), wherein each broadcast modulator of the plurality of broadcast modulators is configured to:
receive the baseband signal from the broadcast gateway;
receive a clock pulse;
generate a broadcast superframe by modeling of a physical layer based on the control plane signal of the baseband signal using a cross-layer control mechanism of the broadcast gateway; and
transmit the broadcast superframe via a plurality of broadcast transmitters, wherein a start of transmission of the broadcast superframe is aligned with a rising edge of the clock pulse.
2. The system of claim 1 , wherein the broadcast superframe is an Orthogonal Frequency Division Multiplexing (OFDM) frame.
3. The system of claim 1 , wherein the broadcast gateway is further configured to add a known delay to the system timestamp to align the system timestamp with a time of the rising edge of the clock pulse and generate a calibrated system timestamp, and wherein the control plane signal includes the calibrated system timestamp.
4. The system of claim 3 , wherein the broadcast superframe includes a first header, a second header, and a payload, the second header including the calibrated system timestamp.
5. The system of claim 4 , wherein the broadcast modulator transmits the first header of the broadcast superframe before the second header, and transmits the second header of the broadcast superframe before the payload of the broadcast superframe.
6. The system of claim 1 , wherein the broadcast gateway is further configured to receive the time signal from a Stratum 1 Network Timing Protocol (NTP) server.
7. The system of claim 1 , wherein the broadcast gateway is coupled to a global positioning system (GPS) receiver, and the broadcast gateway is further configured to receive the time signal from the GPS receiver.
8. The system of claim 1 , wherein the broadcast modulator is coupled to a global positioning system (GPS) receiver, and the clock pulse is a One Pulse Per Second (1PPS) signal received from the GPS receiver, and wherein the broadcast superframe has a duration of 1 second.
9. The system of claim 1 , wherein the broadcast gateway is further configured to send the baseband signal as a universal datagram protocol (UDP) flow to the broadcast modulator.
10. The system of claim 1 , wherein the content includes a plurality of IP flows, each IP flow of the plurality of IP flows being associated with a content provider of the plurality of content providers.
11. The system of claim 10 , wherein the broadcast gateway is further configured to:
determine a mapping of the plurality of IP flows to physical layer resources of the broadcast superframe, wherein the control plane signal further includes the mapping; and
map the plurality of IP flows to Orthogonal Frequency Division Multiplexing (OFDM) subcarriers of the broadcast superframe based on the mapping.
12. A method, comprising:
generating, at a broadcast gateway, a system timestamp from a time signal;
receiving, at the broadcast gateway, content from a plurality of content providers;
generating, at the broadcast gateway, a baseband signal including a user plane signal and a control plane signal, the user plane signal including content from a plurality of content providers, and the control plane signal including the system timestamp, wherein the control plane signal is decoupled from the user plane signal;
generating, at a broadcast modulator of a plurality of broadcast modulators, a broadcast superframe by modeling of a physical layer based on the control plane signal of the baseband signal using a cross-layer control mechanism of the broadcast gateway;
receiving, at the broadcast modulator, a clock pulse; and
transmitting, from the broadcast modulator, the broadcast superframe, wherein the transmitting is aligned with a rising edge of the clock pulse,
wherein the broadcast gateway is located in an Internet Protocol (IP) core network, and
wherein the plurality of broadcast modulators are located in a Single Frequency Network (SFN).
13. The method of claim 12 , further comprising adding, at the broadcast gateway, a known delay to the system timestamp to align the system timestamp with a time of the rising edge of the clock pulse; and generating, at the broadcast gateway, a calibrated timestamp, wherein the control plane signal includes the calibrated system timestamp.
14. The method of claim 13 , wherein the broadcast superframe includes a first header, a second header, and a payload, the second header including the calibrated system timestamp.
15. The method of claim 14 , further comprising: transmitting the first header of the broadcast superframe before the second header, and transmitting the second header of the broadcast superframe before the payload of the broadcast superframe.
16. The method of claim 12 , wherein the broadcast superframe has a length of one second.
17. The method of claim 12 , wherein the clock pulse is a One Pulse Per Second (1PPS) signal received from a global positioning system (GPS) receiver, and wherein the broadcast superframe has a duration of 1 second.
18. The method of claim 12 , further comprising:
receiving, at the broadcast gateway, a plurality of IP flows, each IP flow of the plurality of IP flows corresponding to a content provider of the plurality of content providers, and
mapping, at the broadcast gateway, the plurality of IP flows to Orthogonal Frequency Division Multiplexing (OFDM) subcarriers of the broadcast superframe.
19. The method of claim 12 , further comprising receiving the time signal from a global positioning system (GPS) receiver.
20. The method of claim 12 , further comprising receiving the time signal from a Stratum 1 Network Timing Protocol (NTP) server.