CN1937767A - System for realizing mobile multimedia broadcasting - Google Patents
System for realizing mobile multimedia broadcasting Download PDFInfo
- Publication number
- CN1937767A CN1937767A CN 200610112085 CN200610112085A CN1937767A CN 1937767 A CN1937767 A CN 1937767A CN 200610112085 CN200610112085 CN 200610112085 CN 200610112085 A CN200610112085 A CN 200610112085A CN 1937767 A CN1937767 A CN 1937767A
- Authority
- CN
- China
- Prior art keywords
- signal
- satellite
- transmitter
- dmb network
- network
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Radio Relay Systems (AREA)
Abstract
The invention relates to a multimedia broadcasting system, it includes satellite DMB network and land DMB network. The satellite DMB network includes: satellite signal receiving antenna for receiving satellite signals; transmitter for receiving relative satellite signals from the antenna and conducting frequency conversion and amplification process and sending the processed signals adopting such frequency different from that of satellite signal; mobile terminal for receiving the signals from the transmitter. The invention adopts transmitter to replace current repeater, in which the number of apparatus and cost are reduced.
Description
Technical field
The present invention relates to the technical field of Mobile Multimedia Broadcasting, relate in particular to a kind of system that realizes Mobile Multimedia Broadcasting.
Background technology
Along with the decline of slowing down of increasing of voice and wireless Internet data, services and profit, and the more service demand that proposes of handheld device user, need operator to new business field development.Under this situation, the appearance of DMB technology has brought the opportunity that merges for managing gradually saturated broadcasting and TV media in space and the weak telecom operators of professional income increase, has also brought new opportunity to develop.The significant business that merge as two big industries in the mobile video broadcast field is subjected to operator and user's extensive concern.
At present, realize that the mobile terminal video service manner has two kinds: the 3G network that a kind of mobile operator of being based on provides is realized the Streaming Media multileaving; Another kind is exactly the DMB (Digital Multimedia Broadcasting, DMB) that utilizes on the digital audio broadcasting frequency spectrum, realizes multileaving.3G network is owing to be subjected to the influence of factors such as bandwidth, cause the programme content that can provide limited, and expense is higher.Comparatively speaking, the DMB technology in most of the cases provides the content of one-to-many to transmit service, and therefore this pattern can be utilized frequency spectrum resource fully, so that abundant programme content or other business to be provided.
The DMB technology is divided into surface wave DMB and satellite dmb.
Surface wave DMB passes the signal to transmitting station by central control board, by transmitting station signal is amplified the back emission again, is directly received by portable terminal.At present, standard system based on the surface wave transmission comprises DVB-H (Digital Video Broadcasting Handheld, a kind of transmission standard that multimedia service is provided to portable terminal by the received terrestrial digital broadcasting network), the media FLO of the U.S. in Europe and the T-DMB of Korea S etc.But these ground multimedia broadcast systems cost when realizing the wide covering of signal is very high, and is difficult to realize in certain areas.
The satellite dmb technology is compared with surface wave DMB technology, because have that communication distance is far away, area coverage greatly, is not subjected to the geographical conditions restriction, communication band is wide, transmission capacity is big, communicating line quality is high, reliable and stable, the advantages such as transmission that are suitable for multiple business, therefore is highly suitable for mobile video broadcast.
In the prior art, the concrete network formation of satellite dmb comprises: satellite dmb broadcasting center, DMB communication satellite, repeater.The implementation of satellite dmb business is as follows:
Program provider is transferred to the satellite dmb broadcasting center with digital multimedia content;
The satellite dmb broadcasting center by the Ku wave band with content uploading to the DMB satellite;
The DMB satellite converts the Ku wave band to S-band and amplifies;
The DMB satellite is broadcasted content in China by S-band and Ku wave band;
Portable terminal such as mobile phone or car-mounted terminal can directly receive the content of S-band.
Communication technology of satellite is owing to be subjected to the influence of ground obstacle (as high-rise, viaduct or complex-terrain etc.), signal is subjected to building or influence of topography conductively-closed, make the covering of satellite-signal have the shadow region, portable terminal is difficult to receive desirable satellite-signal in these shadow regions.Prior art also by the combined ground radio network, is promptly arranged the repeater, ground, receives the broadcasting of satellite Ku wave band by described repeater, and converts the Ku wave band to S-band, the S-band satellite-signal is relayed the portable terminal to the shadow region afterwards again.
In the S-DMB technology, main by adopting Gap Filler transponder that satellite is covered the covering that satellite-signal is realized in the shadow region that exists.S-DMB comes receiving satellite signal by utilizing described transponder, and satellite-signal is amplified the back relay to the terminal that is in the shadow region as multipath signal.
No matter be repeater or Gap Filler transponder, both essence all is a kind of repeater, and promptly prior art solves satellite by the method that adopts repeater and covers the problem that has the shadow region, and its system architecture as shown in Figure 1.Since the satellite-signal itself that can arrive ground a little less than, and owing to be subjected to the restriction of mobile terminal circuit linear dynamic range, cause the power of the repeater that adopted to be restricted, the power that is repeater can not be too big, otherwise, in the nearer place of the described repeater of distance, the signal that portable terminal receives may exceed the mobile terminal circuit linear dynamic range because power is too big, thereby causes portable terminal to cause distortion when signal is carried out analog-to-digital conversion.Because repeater power is little, therefore when addressing the above problem, need in system, arrange the repeater that number is more, this just directly causes system cost to increase greatly.With the Korea S is example, implements the S-DMB system in the little country of this area of Korea S and need use 8000 repeaters, and the input of this system on repeater just reaches 3.4 hundred million dollars, this expensive price that has surpassed satellite in this system.And for country with a vast territory, as China, if adopt same technology to realize mobile video broadcast, the cost of system implementation is well imagined so, is extremely huge.In this case, the cost problem seems particularly outstanding and becomes problem demanding prompt solution.
The DMB that China adopts at present is the DVB-S technology, but this standard scheme only is suitable for fixedly receiving equipment usually, can not provide mobile video broadcast for mobile terminal device.In addition, the ground multimedia digit broadcasting system of present other countries in the world employing, as the DVB-H in Europe, the media FLO of high pass and the T-DMB of Korea S realize that the wide cost that covers is higher, and the very difficult realization in zone with a varied topography.
Summary of the invention
The invention provides a kind of system that realizes Mobile Multimedia Broadcasting, thereby effectively reduce the cost of implementing mobile video broadcast system.
Purpose of the present invention realizes by following scheme:
The invention provides a kind of system that realizes Mobile Multimedia Broadcasting, comprise digital multimedia broadcast (dmb) via satellite DMB network, described satellite dmb network comprises service center, ground station and satellite, and described ground station will be uploaded to described satellite by the programme signal that comprises digital multimedia content that described service center provides; Described satellite is broadcasted after described programme signal is treated to satellite-signal earthward; Described system also comprises:
The terrestrial DMB network comprises:
Satellite signal receiving antenna is used to receive described satellite-signal and outwards transmission;
Transmitter Transmitter, be used to receive the satellite-signal that sends through described satellite signal receiving antenna, carrying out frequency inverted and power amplification to the received signal handles, and the employing frequency different with described satellite emission signal will send the standby communication terminal reception through the signal of its processing.
Described terrestrial DMB network also comprises:
First adapter is used to receive the satellite-signal that is sent by described satellite signal receiving antenna, and is distributed to each Transmitter after described satellite-signal is converted to baseband signal.
Described system comprises:
One of them Transmitter among all Transmitter of described first adapter and described terrestrial DMB network is merged, be distributed to each Transmitter after by this Transmitter satellite-signal being converted to baseband signal.
Described system also comprises:
When described satellite dmb network and terrestrial DMB network air interface were incompatible, described system also comprised:
Second adapter is used for the described satellite-signal that the receiving satellite signal reception antenna sends, and described satellite-signal is carried out demodulation, and where necessary the described satellite-signal after the demodulation is decoded; Afterwards described satellite-signal is sent to described Transmitter.
Described system also comprises:
Described Transmitter also is used for the satellite-signal that receives is modulated, and after encoding where necessary, programme signal is sent, and standby communication terminal receives.
Described terrestrial DMB network also comprises:
Other service centers, being used for earthward, the DMB network provides other business datums.
Described system also comprises:
The 3rd adapter is used for business datum that described other business datums that described other service centers are provided and described service center provide and is distributed to described Transmitter after multiplexing;
Described Transmitter also is used for the programme signal after multiplexing is modulated, and after encoding where necessary, described programme signal is sent, and standby communication terminal receives.
Described system also comprises:
When portable terminal is in predefined geographic area,
Described portable terminal receives the programme signal of being sent by described Transmitter;
Perhaps, described portable terminal relatively by after the described satellite-signal of satellites transmits and the described programme signal of sending by described Transmitter, selective reception low signal of the error rate among both;
Perhaps, described portable terminal directly receives the described satellite-signal by satellites transmits.
The technical scheme that is provided by the invention described above as seen, the present invention is by integrating existing satellite dmb network and terrestrial DMB network technology, and by in the terrestrial DMB network, adopting Transmitter to replace existing relay equipment, the quantity of minimizing equipment, when effectively solving wide covering of satellite-signal and degree of depth covering problem, reduce the cost and the minimizing process of implementation system.The solution of signal transmission when multi-media broadcasting system provided by the invention also provides satellite dmb network and terrestrial DMB network air interface incompatible.In addition, horn of plenty digital multimedia broadcasting contents of the present invention provides approach.
Description of drawings
Fig. 1 is the system architecture schematic diagram that existing satellite dmb network combines with terrestrial broadcast networks;
Fig. 2 is the schematic diagram that the multimedia broadcast signal that provides of specific embodiments of the present invention covers in the Different Ground zone;
Fig. 3 is the schematic diagram of the system architecture scheme one that provides of specific embodiments of the present invention;
Fig. 4 is system works flow process figure in the system architecture scheme one that provides of specific embodiments of the present invention;
Fig. 5 is system architecture scheme two schematic diagrames that specific embodiments of the present invention provide;
Fig. 6 is the satellite broadcasting program that provides of specific embodiments of the present invention and the schematic diagram of local service program multiplexing;
Fig. 7 is system works flow process figure in the system architecture scheme two that provides of specific embodiments of the present invention;
Fig. 8 is system architecture scheme three schematic diagrames that specific embodiments of the present invention provide;
Embodiment
The mode that the present invention mainly adopts the satellite dmb network to combine with the terrestrial DMB network, wherein, described satellite dmb network comprises: service center, ground station and satellite; Described terrestrial DMB network comprises: satellite signal receiving antenna and Transmitter (transmitter).The present invention is mainly by adopting Transmitter to replace existing relay equipment in the terrestrial DMB network, be used for satellite-signal is carried out frequency inverted and power amplification by described Transmitter, and the employing frequency different with described satellite emission signal sends described programme signal, standby communication terminal receives, thereby reach the quantity of minimizing equipment, the purpose of abundant DMB service is provided for mobile terminal device.
Owing to the present invention relates to the extensiveness and intensiveness problem that satellite-signal covers, and the feature of mulching material is to produce the reason that satellite-signal covers the shadow region, therefore before telling about concrete enforcement of the present invention, at first the obducent feature in ground is made brief analysis.
Specifically, ground region can be divided into three major types type zone as shown in Figure 2, comprise:
First kind zone
Mulching material mainly comprises zone with a varied topography on the ground in this zone, as the mountain area, or the above ground structure close quarters, as the urban area that exists many high-rise building, viaduct etc. to build.Though satellite-signal can cover this zone, because covering of chevron or intensive building causes the shadow region that exists many satellite-signals to arrive in this zone.Portable terminal is because the satellite signal quality that receives in described shadow region is relatively poor or almost can't receiving satellite signal, so the present invention considers at the type area arrangements terrestrial DMB network.By terrestrial DMB network receiving satellite signal, and be transmitted to portable terminal after amplifying; And portable terminal receives only the signal that the terrestrial DMB network sends in this zone, and does not directly receive the signal by satellite transmission.
Second type area
Mulching material mainly comprises the fringe region of the terrestrial DMB network coverage in this zone.In this zone, the landform on ground is comparatively mild, perhaps has scattered skyscraper industrial area, low layer residential quarter.In this zone, still there is the shadow region in the covering of satellite-signal, and therefore, the present invention considers to arrange the terrestrial DMB network in some areas, to obtain unblanketed satellite-signal coverage effect.And the two quality of the signal that portable terminal sends by contrast satellite-signal and terrestrial DMB network is selected direct receiving satellite signal or is received signal by the relay of terrestrial DMB network.
The 3rd type area
Mulching material mainly comprises the mild open zone of physical features in this zone, as the plains region, or comprises the rural area that vast physical features is open.Owing to have a skyscraper hardly, so satellite-signal is better at this regional coverage effect in this zone, and the shadow region is less relatively; And because this zone is vast in territory, and arrange that the expense of terrestrial DMB is higher, therefore can not need to arrange the terrestrial DMB network, by the direct receiving satellite signal of portable terminal in the type zone.
The present invention is directed to the extensiveness and intensiveness problem that satellite-signal covers, and the cost problem of implementation system, provide following concrete system architecture scheme, and based on the system architecture that provides, the situation of portable terminal received signal in above-mentioned three kinds of zones.
3 the system architecture scheme one that the present invention provide is described in conjunction with the accompanying drawings.
Described system architecture scheme one is suitable for the situation of terrestrial DMB network and satellite dmb network air interface technologies compatibility, and promptly the air interface technologies of satellite dmb network can be applicable to the transmission situation of ground signal.
As shown in Figure 3, system architecture can be divided into two parts in this scheme: satellite dmb network and terrestrial DMB network.
The satellite dmb network mainly comprises service center, ground station and satellite.Wherein, described service center is used to provide information such as business datum, service management and operation management, and sends business datum to described ground station as programme signal; Described ground station arrives described programme signal the satellite in space by uplink transmit; After the described programme signal that described satellite sends ground station is carried out frequency inverted and power amplification, be re-used as satellite-signal wide geographic area broadcasting earthward.
The terrestrial DMB network mainly comprises reception antenna, first adapter, Transmitter.Wherein, described reception antenna is used for receiving satellite signal, and sends satellite-signal to described first adapter; Described first adapter is distributed to each Transmitter after being used for satellite-signal is converted to baseband signal, and if Transmitter adopts the networking mode of single frequency network, described first adapter also has the function that keeps Network Synchronization; The satellite-signal that comprises programme content that described Transmitter is used for receiving carries out frequency inverted and power amplification, and the employing frequency different with satellite emission signal sends programme signal the standby communication terminal reception; Furtherly, first adapter can merge with a Transmitter among all Transmitter, is realized the function of first adapter by the Transmitter of this participation merging.In addition, a Transmitter covers planning sub-district on the ground.
Need to prove, the frequency inverted repeater functional similarity in the function of the terrestrial DMB network that provides in the described system architecture scheme one and the existing satellite multimedia broadcast system, but there is essential distinction between the two.Frequency inverted repeater in the satellite multimedia broadcast system is that the signal that will receive from satellite carries out relaying and amplify the back frequency conversion is descending satellite band carrier frequency, and sends to portable terminal as multipath signal.Owing to be subjected to the restriction of mobile terminal circuit linear dynamic range, promptly the power limited of the portable terminal signal that can receive makes that the transmitting power of repeater can not be too big; And since the satellite-signal that arrives ground a little less than, therefore when implementing, need to arrange that a fairly large number of repeater finishes the amplification forwarding capability to satellite-signal.Relevant this point explains in background technology.Compared with prior art, in the system architecture scheme one that the present invention provides, described Transmitter not only has power amplification and forwarding capability, the more important thing is, described Transmitter is before sending programme signal, also to described satellite-signal working frequency conversion process, like this, the transmitted power of described Transmitter can not be affected.Therefore, when system implementation, positioned opposite repeater quantity can significantly reduce the quantity of arranging Transmitter, thereby can effectively reduce cost.
What in addition, the benefit point mode that the existing relatively repeater of the Transmitter of employing is adopted in the system architecture scheme one of the present invention was different is described Transmitter networking flexibility.In terrestrial DMB network organizing scheme, the terrestrial DMB network can be formed Single Frequency Network, or forms multi-frequency network.Single frequency network is that several transmitting stations in the same area are launched same wireless signal simultaneously on same frequency range, to realize the reliable covering to the regulation coverage.Multiple frequency network, MFN is that the adjacent transmission platform uses the different frequency broadcast program to avoid the phase mutual interference.See that easily single frequency network is compared multiple frequency network, MFN can the conserve on spectrum resource.
Specify the course of work of system in the system architecture scheme one that the invention described above provides in conjunction with Fig. 4.
The frequency range of step 42, ground station up link via satellite is uploaded to satellite to the programme signal through encapsulation;
Described satellite comprises the mobile video broadcast satellite.
If in this system, a Transmitter among first adapter and all Transmitter merges, realize the function of first adapter by the Transmitter of this participation merging, so in described step 46, directly receive the satellite-signal that described antenna transmission goes out by this merged Transmitter, and finish the distribution procedure of satellite-signal.
In system architecture scheme one, portable terminal receives only the programme signal of being sent by described Transmitter in described first kind zone; In second type area, the satellite-signal that the portable terminal contrast receives and the pilot signal of terrestrial DMB network, the signal that the selective reception error rate is low; In the 3rd type area, the direct receiving satellite signal of portable terminal.
5 the system architecture scheme two that the concrete enforcement of the present invention provides is described in conjunction with the accompanying drawings.
This scheme is applicable to the incompatible situation of air interface of satellite dmb network and terrestrial DMB network.The satellite dmb network is different with the channel characteristics separately of terrestrial DMB network, and therefore the air interface technologies that adopts may be different.As, there is the multipath interference problem in the terrestrial DMB network channel, therefore the interfacing that adopts needs to handle this problem; And in the satellite dmb network, the multipath interference problem can be ignored, and therefore the air interface technologies that adopts may not requirement can be handled the multipath interference problem.Therefore, disturb if the air interface technologies of satellite dmb network using can not be resisted multipath, satellite-signal need carry out the air interface technologies conversion by the terrestrial DMB forwarded time so.Native system is by demodulation that the satellite-signal that receives is decoded, and is transmitted into portable terminal after the recompile modulation.
System architecture can be divided into two parts equally in this scheme: satellite dmb network and terrestrial DMB network.
The chief component of the satellite dmb network in described satellite dmb network and the system architecture scheme one is identical, can comprise service center, ground station and satellite equally.The function of these parts is also identical with the function that realizes in the first system architecture scheme.
What the terrestrial DMB network described in this scheme and system architecture scheme one were different is that the terrestrial DMB network mainly comprises in this scheme: satellite signal receiving antenna, second adapter, the 3rd adapter, Transmitter, other service centers (optional).Wherein, described reception antenna is used for receiving satellite signal, and sends the signal that receives to described second adapter; Described second adapter is used for the satellite-signal that receives is carried out demodulation, or where necessary, when promptly portable terminal is not supported the coded format of satellite-signal, the satellite-signal after the demodulation is decoded; Described other service centers are optional part, promptly when other service centers, when also providing the mobile multimedia service for portable terminal as local television, send the local program signal by this service center to described the 3rd adapter; Described the 3rd adapter is used to receive the satellite-signal of handling and sending through second adapter, and, if other service centers also send programme signal to the 3rd adapter, two kinds of signals that described the 3rd adapter needs to receive carry out multiplexing after, be distributed to each Transmitter; Described Transmitter is responsible for and will modulates through the multiplexing programme signal of the 3rd adapter and amplify, or (i.e. the 3rd adapter code stream before decoded) where necessary, satellite-signal is encoded, afterwards described programme signal is sent, standby communication terminal receives.Each Transmitter covers a planning sub-district.In addition, described other service centers are optional part, and the business datum that this part can be provided is multiplexed in the business datum that the satellite dmb network provides, and reaches the purpose that increases programme content; If system is not multiplexing with the business datum that other service centers provide, the 3rd adapter and these two parts of other service centers can be omitted among Fig. 5 so.
In said system architectural schemes two, the carrier frequency that the satellite dmb network is different with the terrestrial DMB network using.In the networking plan of terrestrial DMB network, described terrestrial DMB network can be formed a single frequency network, or a multiple frequency network, MFN.Simultaneously, in this programme the air interface scheme of terrestrial DMB network can with the air interface scheme compatibility of other networks of ground, so networking separately, perhaps with ground on other multimedia broadcasting networks carry out multiplexing.If there has been the ground multimedia radio network in the ground region, during as networks such as DVB-H or DMB-T, adopt multiplex technique, can effectively shorten system's implementation process, reduce the cost of system implementation simultaneously.Wherein, multiplex technique can adopt time division multiplexing or frequency multiplexing technique.
In addition,, also can be undertaken multiplexingly, come the content of abundant broadcasting by program with satellite transmission from the programme content of other service centers.Like this, satellite provides national broadcast program on the one hand, brings into play its wide characteristic that covers; On the other hand, other service centers of ground by with the shared terrestrial DMB network of satellite, the TV programme with local characteristic is provided.Satellite-signal can directly carry out multiplexing in the programme signal of the 3rd adapters and ground multimedia radio network, multiplex technique can be as shown in Figure 6, wherein, satellite dmb network using time slicing techniques, the multimedia broadcasting program that the local service center on insertion ground provides in the time idling cycle.
Specify the specific implementation process of this scheme two in conjunction with Fig. 7.
Step 71 is identical to step 43 with step 41 to step 73;
Step 74, terrestrial DMB network pass through ground satellite signal receiving antenna receiving satellite signal, and described satellite-signal is sent to described second adapter;
Step 75, described second adapter be the satellite-signal demodulation, and after the decoding described satellite-signal is sent where necessary;
Step 76, other service centers as local television, send to described the 3rd adapter with the local service data;
If system is not multiplexing with the business datum that other service centers provide, the program multiplexing process on the 3rd adapter below then this step 77 reaches can be omitted, and can directly receive the signal that second adapter sends by Transmitter.
Step 77, described the 3rd adapter receive the programme signal that the signal that sent by described second adapter and described other service centers provide, and with behind these two kinds of signal multiplexings, are distributed to each Transmitter;
Step 78, described Transmitter modulate the programme signal after multiplexing, and send behind the coding where necessary, and standby communication terminal receives.
Similar with the result of implementation of system architecture scheme one, in system architecture scheme two, portable terminal receives only the programme signal of being sent by described Transmitter in described first kind zone; In second type area, the satellite-signal that the portable terminal contrast receives and the pilot signal of terrestrial DMB network, the signal that the selective reception error rate is low; In the 3rd type area, the direct receiving satellite signal of portable terminal.If what portable terminal received is satellite-signal, then can not watch the programme content that provides by other service centers.
8 the system architecture scheme three that the concrete enforcement of the present invention provides is described in conjunction with the accompanying drawings.
There are certain relation in this scheme and described scheme two, can be with a kind of special case of this scheme as described scheme two.In this scheme, system by receiving satellite signal, carries out the air interface conversion by the terrestrial DMB network based on having the satellite multimedia radio network that is applicable to fixed terminal and is not suitable for portable terminal now simultaneously, makes it to be applicable to portable terminal.
System architecture can be divided into two parts in this scheme: satellite dmb network and terrestrial DMB network.
The chief component of the satellite dmb network in described satellite dmb network and the system architecture scheme one is identical, comprises service center, ground station and satellite.Just, the frequency of satellite emission signal is higher, and is not suitable for using the portable terminal of microminiature antenna directly to receive.Therefore, in this scheme, portable terminal is receiving satellite signal directly, and could receive after must being changed the satellite-signal working frequency by the terrestrial DMB network.
The terrestrial DMB network is also identical with described scheme two in this scheme, comprise: satellite signal receiving antenna, second adapter, the 3rd adapter, Transmitter, other service centers (optional), and the implementation process of this scheme is identical with described scheme two, does not give unnecessary details.
In described scheme three, because system is not suitable for portable terminal, thereby the direct receiving satellite signal of portable terminal, therefore, only in the subregion of the first kind zone and second type area, portable terminal could receive multimedia broadcast signal by described terrestrial DMB network.But, when portable terminal is in the 3rd type area,, and the terrestrial DMB network is not set in this zone then because the direct receiving satellite signal of portable terminal, make that portable terminal can't receiving satellite signal.
Be that in the described system architecture scheme three, the ground networking plan can be a single frequency network, or multiple frequency network, MFN with like the two-phase of described system architecture scheme.Simultaneously and since the air interface scheme of the terrestrial DMB network in this scheme three also can with the air interface scheme compatibility of other networks of ground, therefore, also networking separately of this scheme three, or carry out multiplexing with other multi-media networks of ground.There has been the ground multimedia radio network as existing,, then can have adopted multiplex mode,,, and reduced system cost with the implementation process of minimizing system as time division multiplexing or frequency division multiplexing as networks such as DVB-H, DMB-T.
In addition, be with like the two-phase of described system architecture scheme, from the signal of other service centers, also can with the signal that transmits via satellite carry out multiplexing, to enrich programme content.And, if necessary, described system architecture scheme two and second adapter and the 3rd adapter in the described system architecture scheme three can be merged into an adapter that possesses these two adapter functions, the adapter functions that promptly merges gained is more powerful.
In sum, the present invention is by integrating existing satellite dmb network and terrestrial DMB network technology, and by in the terrestrial DMB network, adopting Transmitter to replace existing relay equipment, the quantity of minimizing equipment, when effectively solving wide covering of satellite-signal and degree of depth covering problem, reduce the cost and the minimizing process of implementation system.The solution of signal transmission when multi-media broadcasting system provided by the invention also provides satellite dmb network and terrestrial DMB network air interface incompatible.In addition, horn of plenty digital multimedia broadcasting contents of the present invention provides approach.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (8)
1, a kind of system that realizes Mobile Multimedia Broadcasting, comprise digital multimedia broadcast (dmb) via satellite DMB network, described satellite dmb network comprises service center, ground station and satellite, and described ground station will be uploaded to described satellite by the programme signal that comprises digital multimedia content that described service center provides; Described satellite is broadcasted after described programme signal is treated to satellite-signal earthward; It is characterized in that described system also comprises:
The terrestrial DMB network comprises:
Satellite signal receiving antenna is used to receive described satellite-signal and outwards transmission;
Transmitter Transmitter, be used to receive the satellite-signal that sends through described satellite signal receiving antenna, carrying out frequency inverted and power amplification to the received signal handles, and the employing frequency different with described satellite emission signal will send the standby communication terminal reception through the signal of its processing.
2, system according to claim 1 is characterized in that, described terrestrial DMB network also comprises:
First adapter is used to receive the satellite-signal that is sent by described satellite signal receiving antenna, and is distributed to each Transmitter after described satellite-signal is converted to baseband signal.
3, system according to claim 2 is characterized in that, comprising:
One of them Transmitter among all Transmitter of described first adapter and described terrestrial DMB network is merged, be distributed to each Transmitter after by this Transmitter satellite-signal being converted to baseband signal.
4, system according to claim 1 is characterized in that, also comprises:
When described satellite dmb network and terrestrial DMB network air interface were incompatible, described system also comprised:
Second adapter is used for the described satellite-signal that the receiving satellite signal reception antenna sends, and described satellite-signal is carried out demodulation, and where necessary the described satellite-signal after the demodulation is decoded; Afterwards described satellite-signal is sent to described Transmitter.
5, system according to claim 4 is characterized in that, also comprises:
Described Transmitter also is used for the satellite-signal that receives is modulated, and after encoding where necessary, programme signal is sent, and standby communication terminal receives.
6, system according to claim 4 is characterized in that, described terrestrial DMB network also comprises:
Other service centers, being used for earthward, the DMB network provides other business datums.
7, system according to claim 6 is characterized in that, also comprises:
The 3rd adapter is used for business datum that described other business datums that described other service centers are provided and described service center provide and is distributed to described Transmitter after multiplexing;
Described Transmitter also is used for the programme signal after multiplexing is modulated, and after encoding where necessary, described programme signal is sent, and standby communication terminal receives.
8, according to each described system in the claim 1 to 7, it is characterized in that, comprising:
When portable terminal is in predefined geographic area,
Described portable terminal receives the programme signal of being sent by described Transmitter;
Perhaps, described portable terminal relatively by after the described satellite-signal of satellites transmits and the described programme signal of sending by described Transmitter, selective reception low signal of the error rate among both;
Perhaps, described portable terminal directly receives the described satellite-signal by satellites transmits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610112085 CN1937767A (en) | 2006-08-29 | 2006-08-29 | System for realizing mobile multimedia broadcasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610112085 CN1937767A (en) | 2006-08-29 | 2006-08-29 | System for realizing mobile multimedia broadcasting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1937767A true CN1937767A (en) | 2007-03-28 |
Family
ID=37954986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610112085 Pending CN1937767A (en) | 2006-08-29 | 2006-08-29 | System for realizing mobile multimedia broadcasting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1937767A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141502A1 (en) * | 2007-05-24 | 2008-11-27 | Zte Corporation | Method of realizing multimedia broadcasting or multicasting service rebroadcasting |
| CN101668191B (en) * | 2008-09-02 | 2011-02-09 | 中广电信有限公司 | Method and system for receiving digital broadcast signal by high-speed running train |
| CN102299762A (en) * | 2010-06-22 | 2011-12-28 | 中兴通讯股份有限公司 | Wireless NGB (next generation broadcasting network) system and adaptive regulating method of channels |
| CN102315865A (en) * | 2010-06-29 | 2012-01-11 | 中兴通讯股份有限公司 | Wave beam forming method of next-generation broadcast television net, system and interacting base station |
| CN104284225A (en) * | 2013-07-05 | 2015-01-14 | 歌乐株式会社 | Vehicle navigation device |
| CN106060638A (en) * | 2016-06-30 | 2016-10-26 | 深圳市智汇十方科技有限公司 | Television signal selection method |
| CN111726700A (en) * | 2020-06-10 | 2020-09-29 | 北京中联合超高清协同技术中心有限公司 | Video relay system and video receiving system |
| CN111756430A (en) * | 2020-07-30 | 2020-10-09 | 康佳集团股份有限公司 | Internet communication method, system and terminal equipment based on low-orbit satellite |
| CN111751869A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气集团有限公司 | Seismic exploration data forwarding method, repeater, related equipment and transmission system |
-
2006
- 2006-08-29 CN CN 200610112085 patent/CN1937767A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141502A1 (en) * | 2007-05-24 | 2008-11-27 | Zte Corporation | Method of realizing multimedia broadcasting or multicasting service rebroadcasting |
| CN101668191B (en) * | 2008-09-02 | 2011-02-09 | 中广电信有限公司 | Method and system for receiving digital broadcast signal by high-speed running train |
| CN102299762A (en) * | 2010-06-22 | 2011-12-28 | 中兴通讯股份有限公司 | Wireless NGB (next generation broadcasting network) system and adaptive regulating method of channels |
| CN102299762B (en) * | 2010-06-22 | 2015-06-10 | 中兴通讯股份有限公司 | Wireless NGB (next generation broadcasting network) system and adaptive regulating method of channels |
| CN102315865A (en) * | 2010-06-29 | 2012-01-11 | 中兴通讯股份有限公司 | Wave beam forming method of next-generation broadcast television net, system and interacting base station |
| CN102315865B (en) * | 2010-06-29 | 2015-05-20 | 中兴通讯股份有限公司 | Wave beam forming method of next-generation broadcast television net, system and interacting base station |
| CN104284225A (en) * | 2013-07-05 | 2015-01-14 | 歌乐株式会社 | Vehicle navigation device |
| CN106060638A (en) * | 2016-06-30 | 2016-10-26 | 深圳市智汇十方科技有限公司 | Television signal selection method |
| CN111751869A (en) * | 2019-03-29 | 2020-10-09 | 中国石油天然气集团有限公司 | Seismic exploration data forwarding method, repeater, related equipment and transmission system |
| CN111726700A (en) * | 2020-06-10 | 2020-09-29 | 北京中联合超高清协同技术中心有限公司 | Video relay system and video receiving system |
| CN111756430A (en) * | 2020-07-30 | 2020-10-09 | 康佳集团股份有限公司 | Internet communication method, system and terminal equipment based on low-orbit satellite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1937767A (en) | System for realizing mobile multimedia broadcasting | |
| EP1880476B1 (en) | Method and receiver for hierarchical demodulation for digital radio signals | |
| US5689245A (en) | Integrated communications terminal | |
| US5455823A (en) | Integrated communications terminal | |
| US8369774B2 (en) | Terrestrial transmitting station for transmitting a terrestrial broadcast signal, satellite-aided broadcast system and receiver for a satellite-aided broadcast system | |
| US5303393A (en) | Integrated radio satellite response system and method | |
| MXPA03011146A (en) | Digital audio playback using local stored content. | |
| CA2746255A1 (en) | Content broadcasting | |
| AU783023B2 (en) | System and method for providing broadcast signals to aircraft | |
| CN101022543A (en) | Ground digital TV overlay transmission cellular single-frequency network overlay system | |
| KR101237649B1 (en) | Mobile communications network, method and apparatuses | |
| Chuberre et al. | Hybrid satellite and terrestrial infrastructure for mobile broadcast services delivery: An outlook to the ‘Unlimited Mobile TV’system performance | |
| CN100399723C (en) | System and method for efficient frequency use in hybrid multi-spot satellite broadcasting system | |
| KR20060066022A (en) | A system for integrate-receiving a terrestrial dmb and a satellite dmb | |
| CN101626511A (en) | Mobile multimedia broadcast system and realization method thereof | |
| CN104683013A (en) | Geosynchronous orbit satellite communication access system and access method | |
| CN101116252B (en) | Apparatus for receiving satellite broadcasting and method thereof | |
| KR100953566B1 (en) | Bidirectional gap filler apparatus for receiving broadcasting signals and relaying communication signals, and method for transmitting signals thereof | |
| CN100403669C (en) | Method for providing real time broadcasting service in mobile communication network | |
| KR100964376B1 (en) | Method for communication in a mobile communication system | |
| EP1633070A2 (en) | Transmission of services with different performance levels | |
| Lee et al. | Field Testing of LDM and SHVC Broadcast in ATSC 3.0 | |
| Peševski | DAB+ RADIO SERVICES WITH QUALITY SUPPORT IN NORTH MACEDONIA | |
| CN113645003A (en) | Regional oriented digital broadcasting and receiving system and method | |
| Andrikopoulos et al. | An overview of digital video broadcasting via satellite services to handhelds (DVB-SH) technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070328 |