CN101193085B - Method, system and device for realizing multimedia broadcast service - Google Patents
Method, system and device for realizing multimedia broadcast service Download PDFInfo
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- CN101193085B CN101193085B CN2006101147899A CN200610114789A CN101193085B CN 101193085 B CN101193085 B CN 101193085B CN 2006101147899 A CN2006101147899 A CN 2006101147899A CN 200610114789 A CN200610114789 A CN 200610114789A CN 101193085 B CN101193085 B CN 101193085B
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Abstract
The invention discloses a method for realizing mobile multimedia broadcasting services, which is applied in a mobile multimedia broadcasting system comprising a terminal. Frequency resources of transmission bandwidth of the mobile multimedia broadcasting system are divided into more than one sub carrier frequency. The method includes the following steps: A. various broadcasting channel signals to be sent are mapped respectively onto the different sub carrier frequencies for broadcasting and indication information for broadcasting signals is broadcast; the indication information for broadcasting signals is used for indicating the information of the sub carrier frequencies over which the broadcasting channel signals are; and B. a terminal chooses to receive the sub carrier frequencies according to the obtained indication information for broadcasting signals. The terminal provided with a narrow band receiving device can receive channel services of a wide-bandwidth mobile multimedia broadcasting system, complexity of intermediation and decoding is lowered and requirements for processing capability and processing cost are lowered with enhanced flexibility. The invention also discloses a system for realizing the mobile multimedia broadcasting services, and a device thereof.
Description
Technical field
The present invention relates to data communication field, relate in particular to a kind of method, system and device of realizing mobile multi-media broadcasting service.
Background technology
The realization of mobile multi-media broadcasting service is meant that mobile phone users receives digital sound, the video content of the forms of broadcasting with the form of channel or channel on the portable terminal with operating system and video capability, for example TV programme etc.Mobile multi-media broadcasting service has caused the extensive concern of industry as a kind of emerging multimedia service.
Mobile multimedia broadcast system is the network system of a high power capacity, usually transmit multiple programs with large bandwidth system, for example in the frequency bandwidth of 10MHz, transmit ten cover even tens programs channels, in the prior art, for such large bandwidth system, terminal adopts is that filter with described mobile media broadcasting network same band receives the broadcasting service in the whole broadcasting frequency scope, as shown in Figure 1, tuner in the terminal will receive the signal in the whole 10MHz frequency bandwidth, and will send to adjuster by the 10MHz baseband signal of tuner and carry out demodulation, at last will be by the compressed audio of demodulator, vision signal sends to decoder and finishes reception, mediation process, but terminal and and do not mind the particular location of signal in large bandwidth system of wanting to watch broadcasting service.In the present invention, the tuner in the terminal, demodulator and decoder are referred to as receiving system.
In the method for prior art, the broadcast channel signal that enters tuner is all signals that broadcast system transmits, will certainly cause follow-up demodulation and decoding more complicated, and because the signal receiving device bandwidth that adopts is bigger, all can increase accordingly to the disposal ability of corresponding intermediate frequency, baseband system, high-speed real-time signal processor and to the requirement of internal memory, cause the power consumption of terminal big, realize that cost is too high; And for the terminal of having only the narrow-band reception device, because the channel service that bandwidth inadequately can't the big bandwidth mobile multimedia broadcast system of whole reception.
Summary of the invention
The invention provides a kind of method, system and device of realizing mobile multi-media broadcasting service, to solve in the prior art for terminal with narrow-band reception device, can not receive the channel service of big bandwidth mobile multimedia broadcast system, and conciliation and decoding complex degree height require height and the high problem of cost to terminal processing capacity.
The invention provides a kind of method that realizes mobile multi-media broadcasting service, be applied to comprise in the mobile multimedia broadcast system of terminal, the frequency resource of the transmission bandwidth of described mobile multimedia broadcast system is divided into more than one sub-carrier frequency, and this method may further comprise the steps:
A. each broadcast channel signal to be sent being divided into different brackets is mapped to respectively on the different sub-carrier frequency and broadcasts, and the broadcast singal indication information broadcasted, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place, when a broadcast channel signal is mapped at least two sub-carrier frequency, the base layer data of this broadcast channel signal is mapped on the sub-carrier frequency, the enhancement data of this broadcast channel signal is mapped on another sub-carrier frequency, and described broadcast singal indication information comprises the time domain that each broadcast channel signal takies at least in transmission, the positional information of frequency domain resource piece;
B. terminal obtains the frequency location information of the broadcast channel signal of desire reception according to the described broadcast singal indication information that obtains, and determine that the transmission content is that terminal is wished the sub-carrier frequency that obtains, and receive the base layer data in the sub-carrier frequency or receive base layer data and enhancement data simultaneously according to the receiving ability of terminal self.
According to the channel division mode frequency resource of the transmission bandwidth of described mobile multimedia broadcast system is divided into more than one sub-carrier frequency.
Adopt OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode to be mapped to respectively on the different sub-carrier frequency each broadcast channel signal to be sent in the steps A.
In the steps A each broadcast channel signal to be sent is mapped to respectively on a plurality of different sub-carrier frequency.
Described broadcast singal indication information is broadcasted by Broadcast Control Channel.
Terminal described in the step B obtains described broadcast singal indication information by detecting described Broadcast Control Channel.
The present invention also provides a kind of system that realizes mobile multi-media broadcasting service, and the frequency resource of the transmission bandwidth of described mobile multi-media broadcasting service comprises more than one sub-carrier frequency, and this system comprises:
Broadcaster, being used for that each broadcast channel signal to be sent is divided into different brackets is mapped to respectively on the different sub-carrier frequency and broadcasts, and the broadcast singal indication information broadcasted, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place, when a broadcast channel signal is mapped at least two sub-carrier frequency, the base layer data of this broadcast channel signal is mapped on the sub-carrier frequency, the enhancement data of this broadcast channel signal is mapped on another sub-carrier frequency, and described broadcast singal indication information comprises the time domain that each broadcast channel signal takies at least in transmission, the positional information of frequency domain resource piece;
Terminal, be used for obtaining the frequency location information of the broadcast channel signal of desire reception according to the described broadcast singal indication information that obtains, and determine that the transmission content is that terminal is wished the sub-carrier frequency that obtains, and receive the base layer data in the sub-carrier frequency or receive base layer data and enhancement data simultaneously according to the receiving ability of terminal self.
Being used to adopt OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode that each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency broadcasts.
Described broadcaster is used for described each broadcast channel signal to be sent is mapped to a plurality of different sub-carrier frequency respectively.
Described broadcast singal indication information is broadcasted by Broadcast Control Channel, and described terminal is used for obtaining described broadcast singal indication information by detecting described Broadcast Control Channel.
The present invention broadcasts by each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency, and the broadcast singal indication information broadcasted, terminal is according to the described broadcast singal indication information that obtains, the method of the sub-carrier frequency of selective reception, for terminal with narrow-band reception device, can receive the channel service of big bandwidth mobile multimedia broadcast system, reconcile with decoding complex degree and reduce, disposal ability requires and cost also reduces, and flexibility improves.
Description of drawings
Fig. 1 is that terminal receives principle schematic in the prior art;
Fig. 2 realizes the system configuration schematic diagram of mobile multi-media broadcasting service for the present invention;
Fig. 3 is an embodiment of the invention steps flow chart schematic diagram;
Fig. 4 is an embodiment of the invention OFDM mapping mode structural representation;
Fig. 5 is the how sub-carrier frequency time division multiplexing of an embodiment of the invention mapping mode structural representation;
Fig. 6 is sub-carrier frequency process schematic diagram for embodiment of the invention terminal receives;
Fig. 7 receives base layer data process schematic diagram for embodiment of the invention terminal;
Fig. 8 is basic layer and enhancement data process schematic diagram for embodiment of the invention terminal receives;
Fig. 9 is a broadcaster structural representation of the present invention;
Figure 10 is a terminal structure schematic diagram of the present invention.
Embodiment
Below in conjunction with Figure of description the present invention is done and to describe in further detail.
As shown in Figure 2, for realizing the system configuration schematic diagram of mobile multi-media broadcasting service among the present invention, the frequency resource of the transmission bandwidth of mobile multi-media broadcasting service comprises more than one sub-carrier frequency, and this system comprises: broadcaster 11 and terminal 12.Wherein, broadcaster 11 is used for each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency broadcasts, and the broadcast singal indication information broadcasted, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place; Terminal 12 is used for according to the described broadcast singal indication information that obtains, the sub-carrier frequency of selective reception.
Described broadcast singal indication information comprises: the coded system of the position of the time domain that each broadcast channel signal takies in transmission, frequency domain resource piece, the zero-time of transmission, mapping mode, precoding mode, employing.
Described broadcaster 11 is used to adopt OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode that each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency to broadcast, can also be used for described each broadcast channel signal to be sent is mapped to one or more different sub-carrier frequency respectively.
Described terminal 12 is according to the receiving ability of the described broadcast singal indication information that obtains and this terminal self, the one or more sub-carrier frequency of selective reception.
Described broadcast singal indication information is broadcasted by Broadcast Control Channel, and described terminal 12 is used for obtaining described broadcast singal indication information by detecting described Broadcast Control Channel.
Describe the inventive method in detail below in conjunction with specific embodiment, be applied to comprise in the mobile multimedia broadcast system of terminal.In the present embodiment, the transmission bandwidth of setting transmitting mobile multimedia broadcasting service in the mobile broadcast network is 20MHz, the frequency resource of the transmission bandwidth of this mobile multimedia broadcast system is divided into more than one sub-carrier frequency, as shown in Figure 3, be steps flow chart schematic diagram in the embodiment of the invention, mainly may further comprise the steps:
Step 301: each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency broadcasts, and the broadcast singal indication information is broadcasted.
In the present embodiment, the bandwidth of transmitting mobile multimedia broadcast system is 20MHz, if the signal receiving device of terminal is the broadcast band that full bandwidth ground receives whole 20MHz, will certainly cause a large amount of wastes of resource, increased requirement to the terminal data disposal ability, and just can't receiving broadcast signal for some terminal of having only the narrow-band reception device.Therefore in the present invention, the frequency resource that with bandwidth is 20MHz is the experimental process carrier frequency by channel division, and each broadcast channel signal to be sent is mapped to respectively on one or more sub-carrier frequency, if the bandwidth of each sub-carrier frequency is 1MHz, then be divided into 20 sub-carrier frequency.The mapping mode of signal can have multiple, for example, can adopt OFDM (OFDM) mapping mode, and broadcast channel signal is mapped on one section continuous sub-carrier frequency, as shown in Figure 4; Also can adopt how sub-carrier frequency Time Division Multiplexing mapping mode, broadcast channel signal is mapped on the sub-carrier frequency, as shown in Figure 5.
In the present embodiment, adopt how sub-carrier frequency TDM mapping mode, on each sub-carrier frequency, adopt quarternary phase-shift keying (QPSK) (QPSK) or 16 quadrature amplitude modulations (16-QAM) mode to shine upon.Because the data bandwidth of some broadcast channel signal is bigger, can't be mapped on the sub-carrier frequency that a bandwidth is 1MHz, so this broadcast channel signal may be mapped on several the sub-carrier frequency.In order to guarantee correctly to receive this channel signals in the terminal that contains the narrow-band reception device, and the terminal that contains broadband receiving set can not only correctly receive this channel signals, can also obtain the higher quality of reception, therefore this broadcast channel signal being divided into different brackets is mapped to respectively on the sub-carrier frequency and broadcasts, that is to say that the base layer data with this broadcast channel signal is mapped on the sub-carrier frequency, and the enhancement data of this broadcast channel signal is mapped on another sub-carrier frequency.Can guarantee to have only the terminal of narrow-band reception device can the selective reception base layer data like this, the content that can watch this channel, just because the data volume of receiving is less, watching quality is poor slightly; And the terminal with broadband receiving set can receive the data of basic layer of this channel and enhancement layer simultaneously, and these two parts data is carried out compound, obtains the higher quality of reception.
Because terminal only is concerned about the business of some or several channels when the actual reception broadcast singal, therefore this terminal will be obtained broadcast singal to be sent map information on sub-carrier frequency earlier, to determine that the content of transmitting in which sub-carrier frequency is the desired acquisition of terminal, the sub-carrier frequency that receives only this business place gets final product.Transmitter side transmits the broadcast singal indication information on Broadcast Control Channel, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place, and the content of this indication information can comprise: the coded system of the position of the time domain that each broadcast channel signal takies in transmission, frequency domain resource piece, the zero-time of transmission, mapping mode, precoding mode, employing.This broadcast singal indication information has been broadcasted multiple mode, for example, in multimedia broadcast multicast system (MBMS), this indication information can be transmitted in MBMS control channel (MCCH) with the business navigation expense of evolution MBMS, allow terminal know the positional information of each channel signals data in resource.When described broadcast singal indication information in when transmission, the signal parallel of above-mentioned 20 channels is mapped on the different sub-carrier frequency, broadcast by the base station transmitting antenna.Certainly, in the present invention, the broadcast order of broadcast singal indication information and sub-carrier frequency does not have sequencing
Step 302: terminal is according to the described broadcast singal indication information that obtains, the sub-carrier frequency of selective reception.
Terminal needs to receive the information of two aspects: broadcast singal indication information and broadcast channel signal for the correct broadcast channel signal that goes for that receives.Terminal obtains described broadcast singal indication information by the detecting Broadcast Control Channel, in the present embodiment, terminal is obtained the broadcast singal Indication message by detecting MCCH, and the frequency location information of the broadcast channel signal that the acquisition desire receives from this Indication message, to determine that the content of transmitting is the desired acquisition of terminal in which sub-carrier frequency, and with self be tuned to corresponding sub-carrier frequency frequency, the ready-to-receive signal data.When broadcast channel signal arrived, the receiving system of terminal extracted the broadcast channel signal in the described sub-carrier frequency, and by this broadcast channel signal of decoding processing, obtained the programme content of wanting.
The present invention is in order to provide higher-quality program to the terminal use, when transmitting the broadcasting service of higher quality of service, can be by sending the method for business datum at different carrier frequency higher slice, take into account the terminal with broadband reception ability and the terminal of narrow-band reception ability.In the present embodiment, when the broadcast channel signal data bandwidth that goes for is 1MHz, when being mapped on the sub-carrier frequency, as shown in Figure 6, after broadcast channel signal is broadcasted by transmission channel, terminal receives only broadcast channel signal in this sub-carrier frequency by tuner, and by demodulator and this sub-carrier frequency of decoder processes.When the broadcast channel signal data bandwidth that goes for is 2MHz, when being mapped on two sub-carrier frequency, will decompose these data.Receive only the MBMS data division of basic layer even the principle of decomposing is a terminal, just can obtain original MBMS business by the demodulation sign indicating number, only lower grade of Ye Wu service quality (QoS); And receive basic layer and increase the two-part data of layer, just can obtain higher level QoS business.For example, the MBMS of evolved universal terrestrial wireless access (E-UTRA) will support the mobile TV program of 16 channels at least, and each channel is approximately 300kbps; 300kbps is equivalent to per second will pass image about 30 frames; A kind of simple decomposing scheme is exactly the part that the mobile TV program of a 300kbps is decomposed into two 15 frame/seconds, can certainly be to decompose in the application layer part (program source code section) of mobile TV program.Basic layer and enhancement layer belong to the category of application layer, and concrete decomposition can have multiple scheme.Wherein, basic layer is meant the professional basic data division of a MBMS; Enhancement layer is meant the professional data division that strengthens of a MBMS.For example, concerning a mobile TV, basic layer is to guarantee the definition that image is basic or the MBMS data division of fluency, is receiving under the prerequisite of base layer data, and enhancement layer can further improve the definition or the fluency of image.Simultaneously, the information of decomposition also will be broadcasted by control channel.
In the present embodiment, be the base layer signal data on the sub-carrier frequency, be the 128k size, be the enhancement layer signal data on the sub-carrier frequency, also be the 128k size.As shown in Figure 7, when having only 1MHz as if the bandwidth of terminal receiving system, in order at first to guarantee to watch this channel content, this terminal obtains base layer signal data.As shown in Figure 8, if terminal receiving system bandwidth is when having 2MHz at least, this terminal obtains the signal data of basic layer and enhancement layer simultaneously, and these two-layer data is carried out compound, obtains quality business preferably.
By the inventive method, for terminal, can receive the channel service of big bandwidth mobile multimedia broadcast system with narrow-band reception device, to reconcile with decoding complex degree and reduce, disposal ability requires and cost also reduces, and flexibility improves.
As shown in Figure 9, the present invention also provides a kind of broadcaster, be applied to realize that in the system of mobile multi-media broadcasting service, the frequency resource of the transmission bandwidth of mobile multi-media broadcasting service comprises more than one sub-carrier frequency, this device comprises map unit 21 and radio unit 22.Wherein, map unit 21 is used for each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency and sends; Radio unit 22 is used for and the broadcast singal indication information is broadcasted, and described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place.
Described map unit 21 is used to adopt OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode that each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency to broadcast, also be used for described each broadcast channel signal to be sent is mapped to one or more different sub-carrier frequency respectively.
As shown in figure 10, the present invention also provides a kind of terminal, be applied to realize in the system of mobile multi-media broadcasting service, when the frequency resource of the transmission bandwidth of mobile multimedia broadcast system is divided into more than one sub-carrier frequency, each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency and broadcasts, and when the broadcast singal indication information also was carried out broadcasting, described terminal comprised Indication message acquiring unit 31 and signal receiving unit 32.Wherein, Indication message acquiring unit 31 is used for the receiving broadcast signal indication information; Signal receiving unit 32 is used for according to described broadcast singal Indication message, the sub-carrier frequency of selective reception.
Described signal receiving unit 32 also is used for according to described broadcast singal Indication message and the receiving ability of self, the one or more sub-carrier frequency of selective reception.
Described broadcast singal indication information is broadcasted by Broadcast Control Channel, and described Indication message acquiring unit 31 is used for obtaining described broadcast singal indication information by detecting described Broadcast Control Channel.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. method that realizes mobile multi-media broadcasting service, be applied to comprise in the mobile multimedia broadcast system of terminal, it is characterized in that the frequency resource of the transmission bandwidth of described mobile multimedia broadcast system is divided into more than one sub-carrier frequency, and this method may further comprise the steps:
A. each broadcast channel signal to be sent being divided into different brackets is mapped to respectively on the different sub-carrier frequency and broadcasts, and the broadcast singal indication information broadcasted, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place, when a broadcast channel signal is mapped at least two sub-carrier frequency, the base layer data of this broadcast channel signal is mapped on the sub-carrier frequency, the enhancement data of this broadcast channel signal is mapped on another sub-carrier frequency, and described broadcast singal indication information comprises the time domain that each broadcast channel signal takies at least in transmission, the positional information of frequency domain resource piece;
B. terminal obtains the frequency location information of the broadcast channel signal of desire reception according to the described broadcast singal indication information that obtains, and determine that the transmission content is that terminal is wished the sub-carrier frequency that obtains, and receive the base layer data in the sub-carrier frequency or receive base layer data and enhancement data simultaneously according to the receiving ability of terminal self.
2. the method for claim 1 is characterized in that, according to the channel division mode frequency resource of the transmission bandwidth of described mobile multimedia broadcast system is divided into more than one sub-carrier frequency.
3. the method for claim 1 is characterized in that, adopts OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode to be mapped to respectively on the different sub-carrier frequency each broadcast channel signal to be sent in the steps A.
4. the method for claim 1 is characterized in that, in the steps A each broadcast channel signal to be sent is mapped to respectively on a plurality of different sub-carrier frequency.
5. the method for claim 1 is characterized in that, described broadcast singal indication information is broadcasted by Broadcast Control Channel.
6. method as claimed in claim 5 is characterized in that, terminal described in the step B obtains described broadcast singal indication information by detecting described Broadcast Control Channel.
7. a system that realizes mobile multi-media broadcasting service is characterized in that, the frequency resource of the transmission bandwidth of described mobile multi-media broadcasting service comprises more than one sub-carrier frequency, and this system comprises:
Broadcaster, being used for that each broadcast channel signal to be sent is divided into different brackets is mapped to respectively on the different sub-carrier frequency and broadcasts, and the broadcast singal indication information broadcasted, described broadcast singal indication information is used to indicate the sub-carrier frequency information at broadcast channel signal place, when a broadcast channel signal is mapped at least two sub-carrier frequency, the base layer data of this broadcast channel signal is mapped on the sub-carrier frequency, the enhancement data of this broadcast channel signal is mapped on another sub-carrier frequency, and described broadcast singal indication information comprises the time domain that each broadcast channel signal takies at least in transmission, the positional information of frequency domain resource piece;
Terminal, be used for obtaining the frequency location information of the broadcast channel signal of desire reception according to the described broadcast singal indication information that obtains, and determine that the transmission content is that terminal is wished the sub-carrier frequency that obtains, and receive the base layer data in the sub-carrier frequency or receive base layer data and enhancement data simultaneously according to the receiving ability of terminal self.
8. system as claimed in claim 7, it is characterized in that, described broadcaster is used to adopt OFDM mapping mode or how sub-carrier frequency time division multiplexing mapping mode that each broadcast channel signal to be sent is mapped to respectively on the different sub-carrier frequency and broadcasts.
9. system as claimed in claim 7 is characterized in that, described broadcaster is used for described each broadcast channel signal to be sent is mapped to a plurality of different sub-carrier frequency respectively.
10. system as claimed in claim 7 is characterized in that, described broadcast singal indication information is broadcasted by Broadcast Control Channel, and described terminal is used for obtaining described broadcast singal indication information by detecting described Broadcast Control Channel.
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| CN108029074B (en) * | 2015-09-28 | 2021-02-19 | 苹果公司 | Apparatus, device, and computer-readable storage medium for air interface resource utilization for wireless communication networks |
| CN107872847B (en) * | 2016-09-28 | 2024-01-19 | 华为技术有限公司 | Method for transmitting data, network device and terminal device |
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| CN1571512A (en) * | 2004-04-30 | 2005-01-26 | 清华大学 | Mobile terminal oriented multimedia broadcasting system and implementing method thereof |
| WO2006096679A1 (en) * | 2005-03-08 | 2006-09-14 | Qualcomm Flarion Technologies, Inc. | Digital broadcast methods and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1571512A (en) * | 2004-04-30 | 2005-01-26 | 清华大学 | Mobile terminal oriented multimedia broadcasting system and implementing method thereof |
| WO2006096679A1 (en) * | 2005-03-08 | 2006-09-14 | Qualcomm Flarion Technologies, Inc. | Digital broadcast methods and apparatus |
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