CN101790028A - System and method for returning data - Google Patents
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- CN101790028A CN101790028A CN 201010112524 CN201010112524A CN101790028A CN 101790028 A CN101790028 A CN 101790028A CN 201010112524 CN201010112524 CN 201010112524 CN 201010112524 A CN201010112524 A CN 201010112524A CN 101790028 A CN101790028 A CN 101790028A
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Abstract
The embodiment of the invention discloses a system and a method for returning data, belonging to the field of cable television. The system comprises a set-top box provided with an IC (integrated circuit) card interface, and a cable modem, wherein the set-top box is used for generating data to be returned according to the service requirement and sending the data to be returned to the cable modem via the IC card interface; and the cable modem is used for modulating or demodulating the data to be returned into radio-frequency signals and returning the radio-frequency signals via a radio-frequency port. The method comprises the following steps that: the set-top box generates data to be returned according to the service requirement and sends the data to be returned to the cable modem via the IC card interface; and the cable modem modulates or demodulates the received data to be returned into radio-frequency signals and returns the radio-frequency signals via a radio-frequency port. The scheme of the invention has the advantages of convenient transformation and low cost and rapidly promotes the existing network bidirectional transformation.
Description
Technical Field
The present invention relates to the field of cable television, and in particular, to a system and method for data return.
Background
At present, the development of cable television networks in China is increasing at the speed of nearly 1000 ten thousand users per year, so that the cable television network becomes one of the largest networks in China. With the continuous development of science and technology, the types of services provided by cable television networks to users are increasing, for example, the users can request programs through set-top boxes. However, in the prior art, most of the set-top boxes in the cable television network are set-top boxes added during translation of the digital television, and are unidirectional set-top boxes, and do not have channels for returning data such as user on-demand data, so that many users using unidirectional set-top boxes cannot obtain the services.
If a channel for returning data needs to be added to a unidirectional set-top box in the existing television network, the following methods are generally adopted: the operator recovers the existing set top boxes from each user, delivers the existing set top boxes to a generator of the set top boxes to process the recovered set top boxes, and delivers the recovered set top boxes to the operator after a return channel is added, and then the recovered set top boxes are delivered to each user; or, a new bidirectional set-top box can be sent to the user again to replace the original unidirectional set-top box. However, the above prior art has great disadvantages, such as tedious implementation process, long cycle, high cost, etc.
Disclosure of Invention
In order to enable the existing one-way set-top box to have the function of returning data, and to be as simple and easy as possible and low in cost, the embodiment of the invention provides a system and a method for returning data.
In one aspect, an embodiment of the present invention provides a system for data backhaul, where the system includes: the set-top box and the cable modem are provided with an IC card interface;
the set-top box is used for generating data to be transmitted back according to business requirements and transmitting the data to be transmitted back to the cable modem through the IC card interface;
the cable modem is used for receiving the data to be transmitted back, modulating and demodulating the data into radio frequency signals, and transmitting the radio frequency signals back through a radio frequency port of the cable modem.
The cable modem comprises an IC card adapter plate, a processor module and a radio frequency modulation and demodulation module;
the IC card adapter board is connected with an IC card interface of the set-top box, and at least a power signal line, a grounding signal line and an input/output signal line are led out from the IC card interface of the set-top box;
the processor module is used for receiving data to be transmitted back from the input/output signal line, processing the data to be transmitted back and then transmitting the processed data to the radio frequency modulation/demodulation module;
the radio frequency modulation and demodulation module is used for obtaining a power supply signal from the power supply signal wire and obtaining a grounding signal from the grounding signal wire, modulating and demodulating the received data into a radio frequency signal when receiving the data sent by the processor module, and returning the radio frequency signal through a radio frequency port of the radio frequency modulation and demodulation module.
The system further comprises an IC card;
correspondingly, the cable modem also comprises an IC card interface, and the IC card is connected with the cable modem through the IC card interface of the cable modem;
the IC card adapter board is also led out of a reset signal line and a clock signal line from an IC card interface of the set-top box, and the IC card interface of the cable modem is respectively connected with the power signal line, the grounding signal line, the reset signal line, the input and output signal line and the clock signal line;
the IC card is used for obtaining the reset signal of the set-top box from the reset signal line through the IC card interface of the cable modem, and when the reset signal indicates that the IC card receives data, the IC card receives the data from the input/output signal line.
The processor module is further to: obtaining a reset signal of the set top box from the reset signal line;
correspondingly, when the reset signal indicates the processor module to carry out data communication, the data to be transmitted back is received from the input and output signal line.
The reset signal is a logic level;
when the logic level is a high level, the logic level is used for indicating the processor module to carry out data communication; when the logic level is a low level, the logic level is used for indicating the IC card to carry out data communication;
or,
when the logic level is a low level, the logic level is used for indicating the processor module to carry out data communication; and when the logic level is high level, the logic level is used for indicating the IC card to carry out data communication.
On the other hand, an embodiment of the present invention provides a method for returning data by using the system, where the method includes:
the set top box generates data to be transmitted back according to business requirements and transmits the data to be transmitted back to the cable modem through the IC card interface;
and after the cable modem modulates and demodulates the received data to be transmitted back into radio frequency signals, the radio frequency signals are transmitted back through a radio frequency port of the cable modem.
The sending the data to be transmitted back to the cable modem through the IC card interface specifically includes:
the set top box sends the data to be transmitted back to the IC card interface;
controlling a reset signal line led out from the IC card interface by the cable modem to enable a reset signal on the reset signal line to indicate a processor module of the cable modem to receive data;
and the data to be transmitted back is sent to a processor module of the cable modem on an input/output signal wire which is led out from the IC card interface by the cable modem.
The reset signal is a logic level;
when the logic level is a high level, the logic level is used for indicating the processor module to carry out data communication; or,
and when the logic level is a low level, the logic level is used for indicating the processor module to carry out data communication.
The cable modem modulates and demodulates the received data to be transmitted back into radio frequency signals, and the method specifically includes:
the processing module of the cable modem sends the received data to be transmitted back to the radio frequency modulation and demodulation module of the cable modem, and the radio frequency modulation and demodulation module modulates and demodulates the received data to be transmitted back into radio frequency signals.
The method further comprises the following steps:
and the cable modem receives downlink data through a radio frequency port of the cable modem and sends the downlink data to the set top box through the IC card interface.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
the data to be transmitted back is sent to the cable modem through the IC card interface of the set-top box, and the data to be transmitted back is modulated and demodulated into radio frequency signals by the cable modem and then transmitted back through the radio frequency port of the cable modem. The method for expanding the return channel of the set top box by using the IC card interface does not need to change the hardware of the existing one-way set top box, only needs to be externally connected with a cable modem, and has the advantages of convenient modification, low cost, rapid promotion of the existing network bidirection and the like. Meanwhile, the receiving of downlink data can be realized, and the bidirectional communication of the unidirectional set top box is realized.
Drawings
FIG. 1 is a system diagram of data backhaul provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cable modem according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cable modem and an IC card according to another embodiment of the present invention;
FIG. 4 is a system diagram of data backhaul according to another embodiment of the present invention;
FIG. 5 is a flowchart of a method for data backhauling according to another embodiment of the invention;
fig. 6 is a schematic system structure diagram of data backhaul according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1
A first embodiment of the present invention provides a system for data backhaul, referring to fig. 1, the system includes: a set-top box 101 with an IC card interface and a cable modem 102;
the set top box 101 is configured to generate data to be transmitted back according to a service requirement, and transmit the data to be transmitted back to the cable modem 102 through the IC card interface;
the cable modem 102 is configured to receive data to be transmitted back, modulate and demodulate the data into a radio frequency signal, and transmit the radio frequency signal back through a radio frequency port of the cable modem.
The term "backhaul" as used herein is understood to mean that the subscriber side transmits data to the television network side.
The first embodiment of the present invention provides a data backhaul system, which transmits data to be backhaul to a cable modem through an IC card interface of a set-top box, and the cable modem modulates and demodulates the data to be backhaul into a radio frequency signal, and then performs backhaul through a radio frequency port of the cable modem. The method for expanding the return channel of the set top box by using the IC card interface does not need to change the hardware of the existing one-way set top box, only needs to be externally connected with a cable modem, and has the advantages of convenient modification, low cost, rapid promotion of the existing network bidirection and the like.
Example 2
A second embodiment of the present invention is implemented on the basis of the first embodiment, and the second embodiment of the present invention provides a system for data backhaul, which is shown in fig. 1 and may include: a set-top box 101 with an IC card interface and a cable modem 102;
the set-top box 101 generates data to be transmitted back according to the service requirement, and transmits the data to be transmitted back to the cable modem 102 through the IC card interface;
the cable modem 102 is configured to modulate and demodulate data to be transmitted back into a radio frequency signal, and transmit the radio frequency signal back through a radio frequency port of the cable modem.
Under one embodiment, referring to fig. 2, cable modem 102 may include: the IC card adapter plate 102A, the processor module 102B and the radio frequency modulation and demodulation module 102C;
the IC card adapter board 102A is connected to an IC card interface of the set-top box 101, and at least a power signal line (VCC), a ground signal line (GND) and an input/output signal line (I/O) are led out from the IC card interface of the set-top box 101;
the processor module 102B receives data to be transmitted back from the input/output signal line, processes the data to be transmitted back, and transmits the processed data to the rf modem module 102C;
the rf modem module 102C obtains a power signal from the power signal line and a ground signal from the ground signal line, and when receiving the data sent by the processor module 102B, modulates and demodulates the received data into an rf signal, and returns the rf signal through its rf port.
In one embodiment, referring to fig. 3, the data backhaul system may further include an IC card 103;
correspondingly, the cable modem 102 further includes an IC card interface 102D, and the IC card 103 is connected to the cable modem 102 through the IC card interface 102D of the cable modem 102;
the IC card adapter board 102A also needs to be led out, reset signal line (RST) and clock signal line (CLK) from the IC card interface of the set-top box 101, and the IC card interface 102D of the cable modem 102 is connected with the power signal line, the ground signal line, the reset signal line, the input/output signal line and the clock signal line;
the IC card 103 obtains a reset signal transmitted from the set-top box 101 through the IC card interface 102D of the cable modem 102, and when the reset signal instructs the IC card 103 to receive data, the IC card receives data from the input/output signal line.
Accordingly, the processor module 102B is further configured to: obtaining a reset signal of the set-top box 101 from a reset signal line; if the reset signal indicates that processor module 101B is performing data communications, the data to be transmitted back is received from the input/output signal line.
In the embodiment provided by the invention, the reset signal is a logic level;
when the logic level is a high level, the set top box is used for indicating the set top box to carry out data communication with the processor module 102B; when the logic level is a low level, the logic level is used for indicating the set-top box to perform data communication with the IC card 103;
or,
when the logic level is a low level, the set top box is used for indicating the set top box to carry out data communication with the processor module 102B; when the logic level is high level, it is used to instruct the set-top box to perform data communication with the IC card 103.
The second embodiment of the present invention provides a system for returning data, wherein the data to be returned is sent to a cable modem through an IC card interface of a set-top box, and the data to be returned is modulated and demodulated into a radio frequency signal by the cable modem, and then returned through a radio frequency port of the cable modem; meanwhile, the cable modem provides an IC card interface for the IC card, and can realize the coordination work with the cable modem by multiplexing the reset signal on the reset signal line. The method for expanding the return channel of the set top box by using the IC card interface does not need to change the hardware of the existing one-way set top box, only needs to be externally connected with a cable modem on the basis of ensuring the data exchange function of the original set top box and the IC card, and has the advantages of convenient modification, low cost, rapid promotion of the existing network bidirectional and the like.
Example 3
A third embodiment of the present invention is implemented on the basis of the first embodiment or the second embodiment, and provides a system for data backhaul, referring to fig. 4, the system includes: a set-top box 101 with an IC card interface, a cable modem 102 and an IC card 103;
the set-top box 101 at least comprises a main CPU101A and an IC card interface 101B; the cable modem 102 includes at least an IC card adapter board 102A, IC card interface 102B, a processor module 102C, and a radio frequency modem module 102D.
The IC card 103 is connected to the cable modem 102 through an IC card interface 102B of the cable modem 102, and the cable modem 102 is connected to an IC card interface 101B of the set-top box 101 through an IC card adapter board 102A thereof. The IC card adapter board 102A of the cable modem 102 leads out the following signal lines from the IC card interface 101B of the set-top box 101: VCC (power supply), GND (ground), RST (reset), CLK (clock), and I/O (input/output data). The led-out signal lines are all connected with VCC, GND, RST, CLK and I/O signal lines of the IC card interface 102B of the cable modem 102; the processor module 102C of the cable modem 102 is connected to the RST signal line and the I/O signal line, and outputs signals to the rf modem module 102D, and the rf modem module 102D is connected to the GND signal line and the VCC signal line, and can transmit rf signals through its rf port.
When the system transmits data back, the set-top box 101 is a master, the processor module 102C, IC of the cable modem 102 is a slave, and the master CPU101A of the set-top box 101 indicates whether to communicate with the IC card 103 or the processor module 102C of the cable modem 102 by controlling the level of the RST signal.
For example, when the RST signal is at high level 1, the main CPU101A provides the CLK signal to the IC card 103, and communicates with the IC card 103 through the I/O port; when the processor module 102C of the cable modem 102 detects that the RST signal is at a high level 1, the I/O port connected to the communication pin is released and does not communicate with the main CPU 101A.
When the RST signal is at low level 0, the IC card 103 is automatically in a reset state, releases the I/O port connected to its communication pin, and does not communicate with the main CPU 101A; when the processor module 102C of the cable modem 102 detects that the RST signal is at the low level 0, the processor module takes over the I/O port connected to the communication pin, communicates with the main CPU101A, and sends the received data to the rf modem module 102D, and the rf modem module 102D modulates the received signal into an rf signal and transmits the rf signal to the front-end device through the rf port thereof, thereby implementing the function of returning the data on the set-top box 101. In addition, the rf port may also receive an rf signal transmitted from the front-end device, and the rf signal is demodulated by the rf modem module 102D and then transmitted to the main CPU101A, thereby completing data interaction between the main CPU101A of the set-top box 101 and the front-end device. The front-end device may be a general term for a gateway, an optical fiber, an ethernet device, a front-end server device, and the like.
Of course, when the RST signal is at a low level, the main CPU101A may communicate with the IC card 103, and the processor module 102C of the cable modem 102 may not communicate with the main CPU 101A; when the RST signal is at a high level, the main CPU101A communicates with the processor module 102C but does not communicate with the IC card 103.
It should be further noted that, since the main CPU101A can obtain its upgrade program from the headend or other remote service equipment through the existing tv network, the user can obtain the corresponding data return method through the program of the upgrade CPU 101A.
The third embodiment of the present invention provides a system for returning data, wherein the data to be returned is sent to a cable modem through an IC card interface of a set-top box, and the data to be returned is modulated and demodulated into a radio frequency signal by the cable modem, and then returned through a radio frequency port of the cable modem; meanwhile, the cable modem provides an IC card interface for the IC card, and can realize the coordination work with the cable modem by multiplexing the reset signal on the reset signal line. The method for expanding the return channel of the set top box by using the IC card interface does not need to change the hardware of the existing one-way set top box, only needs to be externally connected with a cable modem, and has the advantages of convenient modification, low cost, rapid promotion of the existing network bidirection and the like.
Example 4
A fourth embodiment of the present invention is implemented on the basis of the system provided in any one of the first three embodiments, and provides a method for data backhaul, referring to fig. 5, where the method includes:
501: the set-top box generates data to be transmitted back according to business requirements and transmits the data to be transmitted back to the cable modem through the IC card interface of the set-top box;
502: the cable modem modulates and demodulates the received data to be transmitted back into radio frequency signals, and transmits the radio frequency signals back through a radio frequency port of the cable modem.
In one embodiment, the sending data to be transmitted back to the cable modem through the IC card interface in step 501 specifically includes:
(1) the set top box sends data to be transmitted back to an IC card interface of the set top box;
(2) controlling a reset signal line led out from the IC card interface by the cable modem to enable a reset signal on the reset signal line to indicate a processor module of the cable modem to receive data;
(3) and the data to be transmitted back is sent to a processor module of the cable modem on an input/output signal line led out from the IC card interface by the cable modem.
Wherein, the reset signal is a logic level;
when the logic level is high level, the logic level is used for indicating the processor module to carry out data communication; or,
and when the logic level is low level, the logic level is used for indicating the processor module to carry out data communication.
In one embodiment, the step 502 of modulating and demodulating, by the cable modem, the received data to be transmitted back into a radio frequency signal includes:
the processing module of the cable modem sends the received data to be transmitted back to the radio frequency modulation and demodulation module of the cable modem, and the radio frequency modulation and demodulation module modulates and demodulates the received data to be transmitted back into radio frequency signals.
In one embodiment, compared to receiving downlink data through a tuner on a set-top box in the prior art, the method provided in this embodiment may further include the following steps:
the cable modem receives the downlink data through a radio frequency port of the cable modem and sends the downlink data to the set top box through an IC card interface. The downlink data specifically refers to data sent by the front-end device to the set-top box.
Therefore, the data returning method provided by the embodiment of the present invention can not only realize data returning, but also realize downlink receiving of data, and realize dual-channel receiving of downlink data relative to a set-top box, as shown in fig. 6, a common downlink broadcast signal of a cable television and a large-flow data signal of a bidirectional service (e.g., VOD on demand, etc.) can be received through a radio frequency port of a cable modem, a radio frequency output port of the cable modem, and a tuner on the set-top box; and downstream data of the bidirectional interactive service (e.g., VOD, video on demand, etc.) may be transmitted to the set-top box through a radio frequency port of the cable modem, and an IC card interface of the set-top box.
A fourth embodiment of the present invention provides a method for returning data, in which data to be returned is sent to a cable modem through an IC card interface of a set-top box, and the cable modem modulates and demodulates the data to be returned into a radio frequency signal, and then returns the radio frequency signal through a radio frequency port of the cable modem. The method for expanding the return channel of the set top box by using the IC card interface does not need to change the hardware of the existing one-way set top box, only needs to be externally connected with a cable modem, and has the advantages of convenient modification, low cost, rapid promotion of the existing network bidirection and the like. Meanwhile, the receiving of downlink data can be realized, and the bidirectional communication of the unidirectional set top box is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A system for data backhauling, the system comprising: the set-top box and the cable modem are provided with an IC card interface;
the set-top box is used for generating data to be transmitted back according to business requirements and transmitting the data to be transmitted back to the cable modem through the IC card interface;
the cable modem is used for receiving the data to be transmitted back, modulating and demodulating the data into radio frequency signals, and transmitting the radio frequency signals back through a radio frequency port of the cable modem.
2. The system of claim 1, wherein the cable modem comprises an IC card patch panel, a processor module, and a radio frequency modem module;
the IC card adapter board is connected with an IC card interface of the set-top box, and at least a power signal line, a grounding signal line and an input/output signal line are led out from the IC card interface of the set-top box;
the processor module is used for receiving data to be transmitted back from the input/output signal line, processing the data to be transmitted back and then transmitting the processed data to the radio frequency modulation/demodulation module;
the radio frequency modulation and demodulation module is used for obtaining a power supply signal from the power supply signal wire and obtaining a grounding signal from the grounding signal wire, modulating and demodulating the received data into a radio frequency signal when receiving the data sent by the processor module, and returning the radio frequency signal through a radio frequency port of the radio frequency modulation and demodulation module.
3. The system of claim 2, wherein the system further comprises an IC card;
correspondingly, the cable modem also comprises an IC card interface, and the IC card is connected with the cable modem through the IC card interface of the cable modem;
the IC card adapter board is also led out of a reset signal line and a clock signal line from an IC card interface of the set-top box, and the IC card interface of the cable modem is respectively connected with the power signal line, the grounding signal line, the reset signal line, the input and output signal line and the clock signal line;
the IC card is used for obtaining the reset signal of the set-top box from the reset signal line through the IC card interface of the cable modem, and when the reset signal indicates that the IC card receives data, the IC card receives the data from the input/output signal line.
4. The system of claim 3, wherein the processor module is further to: obtaining a reset signal of the set top box from the reset signal line; and if the reset signal indicates the processor module to carry out data communication, the input/output signal line receives data to be transmitted back.
5. The system of claim 3 or 4, wherein the reset signal is a logic level;
when the logic level is a high level, the logic level is used for indicating the processor module to carry out data communication; when the logic level is a low level, the logic level is used for indicating the IC card to carry out data communication;
or,
when the logic level is a low level, the logic level is used for indicating the processor module to carry out data communication; and when the logic level is high level, the logic level is used for indicating the IC card to carry out data communication.
6. A method for data backhaul using the system of claim 1, the method comprising:
the set top box generates data to be transmitted back according to business requirements and transmits the data to be transmitted back to the cable modem through the IC card interface;
and after the cable modem modulates and demodulates the received data to be transmitted back into radio frequency signals, the radio frequency signals are transmitted back through a radio frequency port of the cable modem.
7. The method according to claim 6, wherein the sending the data to be transmitted back to the cable modem via the IC card interface includes:
the set top box sends the data to be transmitted back to the IC card interface;
controlling a reset signal line led out from the IC card interface by the cable modem to enable a reset signal on the reset signal line to indicate a processor module of the cable modem to receive data;
and the data to be transmitted back is sent to a processor module of the cable modem on an input/output signal wire which is led out from the IC card interface by the cable modem.
8. The method of claim 7, wherein the reset signal is a logic level;
when the logic level is a high level, the logic level is used for indicating the processor module to carry out data communication; or,
and when the logic level is a low level, the logic level is used for indicating the processor module to carry out data communication.
9. The method of claim 7, wherein the cable modem modulates and demodulates the received data to be transmitted back into radio frequency signals, and specifically comprises:
the processing module of the cable modem sends the received data to be transmitted back to the radio frequency modulation and demodulation module of the cable modem, and the radio frequency modulation and demodulation module modulates and demodulates the received data to be transmitted back into radio frequency signals.
10. The method of claim 7, wherein the method further comprises:
and the cable modem receives downlink data through a radio frequency port of the cable modem and sends the downlink data to the set top box through the IC card interface.
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| CN2010101125241A CN101790028B (en) | 2010-02-12 | 2010-02-12 | System and method for returning data |
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