CN101820327B - Relay transmission method, system and equipment combining multi-description characteristics of information source - Google Patents
Relay transmission method, system and equipment combining multi-description characteristics of information source Download PDFInfo
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- CN101820327B CN101820327B CN2009102594817A CN200910259481A CN101820327B CN 101820327 B CN101820327 B CN 101820327B CN 2009102594817 A CN2009102594817 A CN 2009102594817A CN 200910259481 A CN200910259481 A CN 200910259481A CN 101820327 B CN101820327 B CN 101820327B
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Abstract
The invention discloses a relay transmission method, a relay transmission system and relay transmission equipment combining multi-description characteristics of an information source. The method is applied to a network system comprising a base station, a plurality of relay stations and a user terminal. The method comprises that: the relay station receives total information sent by the base station through a multi-description information source code; the relay station acquires description stream corresponding to a relay packet to which the equipment belongs according to the relay packet to which the equipment belongs and the total information, and modulates and codes the description stream; and the relay station sends the modulated and coded description stream to the user terminal till the description stream reaches the user terminal. The transmission rate of multimedia information and the robustness of the system can be effectively improved by using the method in a relay transmission mode of combining the multi-description characteristics of the information source.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of relay transmission method, system and equipment of combining multi-description characteristics of information source.
Background technology
In research at present, two kinds of different source encoding thoughts are arranged: based on the hierarchical coding SC (Scalable Coding) of multiresolution with based on the coding MDC (Multiple Description Coding) of many descriptions about video coding.
Based on the hierarchical coding of multiresolution, be divided into basic layer and enhancement layer to video through orthogonal transforms such as wavelet transformation, DCT (Discrete Cosine Transform, discrete cosine) conversion: basic layer comprises low frequency information, and enhancement layer comprises high-frequency information.The information priority level of basic layer is high, needs reliable transmission link; The information priority level of enhancement layer is low, to link reliability require low.The channel quality different according to the terminal, if channel performance is poor excessively, the partial information of enhancement layer can abandon.This type coding is suitable for having in the network in a plurality of paths with unequal error protection ability.
Based on the source encoding of many descriptions are the parts that are divided into original image or video several equivalences, and wherein each part is called a description, and each has stronger correlation between describing.Each description is sent to receiving terminal through the various network path.As long as receiving terminal receives one of them and describes, image or the video information that just can rebuild certain mass, the description number of receiving is many more, can obtain certain diversity so, and the quality of reconstructed image or video is good more.Compare with the hierarchical coding that adopts non-equilibrium error protection, be particularly suitable for not having the transmission network in the path of unequal error protection ability.The sketch map of multi-description coding-decoding model is as shown in Figure 1, and same picture breakdown is become a plurality of descriptions, and each is described absolute coding and is transferred to decoder through different channels, and decoder can be decoded to the description stream of any number.
In the prior art, the sketch map of honeycomb junction network is as shown in Figure 2, through incorporating existing cellular network (calling conventional cellular network again) to " multi-hop " technology, has shortened the communication distance between communication node, has improved the quality and the channel capacity of communication link.Therefore, the honeycomb junction network can improve cell coverage area, reinforced cell capacity, satisfies mobile system of future generation effectively to the covering requirement of interior high-rate service on a large scale.
The problem that exists in the prior art is:
Multi-description video coding has obtained excellent research, existing a variety of multiple description coded modes: the MDC that describes quantization encoding, the MDC based on conversion, forward error correction MDC more and expand based on the quantification framework.But existing MDC generally only is applied in the cable network, and this is because using the prerequisite of MDC is to have many transmission links end to end in the network, in wireless network, uses considerably less.
Summary of the invention
The present invention provides a kind of relay transmission method, system and equipment of combining multi-description characteristics of information source, is used for improving the efficiency of transmission of wireless network multimedia messages and the robustness of system.
The invention provides a kind of relay transmission method, be applied to comprise that said method comprises in the network system of base station, a plurality of relay station and user terminal:
What said relay station received that said base station sends carrying out the full details that source encodings and coded modulation obtain of describing with the source content of multimedia according to the relay for packets result more;
Said relay station is according to relay for packets under this equipment and said full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out coded modulation;
The description of said relay station after with said coded modulation flows to user terminal and sends, and flows to until said description to reach said user terminal.
Wherein, said relay station also comprises before receiving the full detail that sends said base station:
A plurality of relay stations are divided into the relay for packets that belongs to different, and the dividing mode of said relay for packets is static the setting, or dynamically adjusts according to preset period; Said base station carries out correspondingly describing source encoding according to source content of multimedia and said relay for packets result more, and multiple description coded result is carried out coded modulation obtains full detail.
Wherein, said relay station is according to relay for packets under this equipment and said full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out coded modulation, comprising:
Said relay station is decoded to the full detail that receives, and obtains bit stream information;
Said relay station carries out the sampling that known fixed is described rule to the bit stream information that said decoding obtains, obtain with this equipment under the corresponding description of relay for packets stream;
Said relay station carries out coded modulation to the said description stream that gets access to.
Wherein, also comprise:
The bit number of stream is described according to each bar in many description streams; With ratio, confirm in said base station link between the said relay station and said relay station code modulation mode to the link between the said user terminal to the contained bit number of said full detail.
Wherein, also comprise:
Said user terminal carries out the decoding based on many descriptions according to the description stream that receives from different relay stations, obtains the full detail and the source content of multimedia that reduces that send said base station.
The present invention also provides a kind of relay transmission system, comprises base station, a plurality of relay station and user terminal, wherein:
Said base station is used for that the source content of multimedia is carried out describe more and obtains full detail after the source encodings and send to all relay stations;
Said relay station is used to receive that said base station sends that the source content of multimedia is carried out the full details that source encodings and coded modulation obtain of describing according to the relay for packets result more; And the full detail that receives decoded, obtain bit stream information; And the bit stream information that said decoding obtains carried out the sampling that known fixed is described rule, obtain with said relay station under the corresponding description stream of relay for packets; And the description that gets access to said stream carries out coded modulation; Description after the said coded modulation is flowed to user terminal send, flow to until said description and reach said user terminal;
Said user terminal is used for carrying out the decoding based on many descriptions according to the description stream that receives from different relay stations, obtains the full detail and the source content of multimedia that reduces that send said base station.
The present invention also provides a kind of base station, and said base station applies is in the network system that comprises base station, a plurality of relay station and user terminal, and said base station comprises:
The central dispatching unit is used to receive the relay for packets result that relay station feeds back;
The source encoding unit of describing are used for the source content of multimedia is carried out corresponding many description source encodings according to said relay for packets result, and multiple description coded result are carried out coded modulation more;
Transmitting element is used for being sent to all relay stations with said through the full detail after the coded modulation.
The present invention also provides a kind of relay station, and said relay station is applied to comprise that said relay station comprises in the network system of base station, a plurality of relay station and user terminal:
Receiving element is used to receive that said base station sends that the source content of multimedia is carried out the full details that source encodings and coded modulation obtain of describing according to the relay for packets result more;
Processing unit is used for the full detail that receives is decoded, and obtains bit stream information; Bit stream information to said decoding obtains is carried out the sampling that known fixed is described rule, obtain with this equipment under the corresponding description of relay for packets stream; The said description stream that gets access to is carried out coded modulation;
Transmitting element is used for that the description after the said processing unit coded modulation is flowed to user terminal and sends, and flows to until said description to reach said user terminal.
Wherein, also comprise:
Divide into groups to confirm the unit, be used for that obtain self affiliated relay for packets, the dividing mode of said relay for packets is static the setting, or dynamically adjusts according to preset period according to the results that a plurality of relay stations is divided into the relay for packets that belongs to different.
Wherein, said processing unit specifically is used for:
Full detail to receiving is decoded, and obtains bit stream information;
Bit stream information to said decoding obtains is carried out the sampling that known fixed is described rule, obtain with this equipment under the corresponding description of relay for packets stream;
The said description stream that gets access to is carried out coded modulation.
Wherein, also comprise:
The modulation coding mode acquiring unit; Be used for flowing the bit number that each bar is described stream according to describe more; With ratio, confirm in said base station link between the said relay station and said relay station code modulation mode to the link between the said user terminal to the contained bit number of said full detail.
Compared with prior art, the present invention has the following advantages:
The application of the invention, the relay transmission mode of use combining multi-description characteristics of information source can improve the transmission rate of multimedia messages and the robustness of system effectively.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the sketch map of multi-description coding-decoding model in the prior art;
Fig. 2 is the sketch map of honeycomb junction network in the prior art;
Fig. 3 is the flow chart of the relay transmission method that provides among the present invention;
Fig. 4 is the network architecture sketch map of double bounce junction network in the application scenarios of the present invention;
Fig. 5 is when RN works in the MDF pattern in the application scenarios of the present invention, employed transmission plan sketch map;
Fig. 6 is when RN works in the DF pattern in the application scenarios of the present invention, employed transmission plan sketch map;
Fig. 7 is the TP that emulation obtains in the application scenarios of the present invention
Imag-SNR
ENB_RNCurve;
Fig. 8 is the TP that emulation obtains in the application scenarios of the present invention
Imag-SNR
RN_UECurve chart;
Fig. 9 is the structural representation of the base station that provides among the present invention;
Figure 10 is the structural representation of the relay station that provides among the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously; Described embodiment only is the present invention part embodiment, and the every other embodiment that is not obtained under the creative work prerequisite, all belongs to the scope of the present invention's protection.
By can knowing multiple description coded understanding in the prior art, between base station and user terminal, from the process that is dealt into receipts, must exist two and above path can use multi-description coding method.Along with the appearance of junction network,, make the base station possibly have two even multilink, for multiple description coded application in junction network provides condition to the user through in the sub-district, placing a plurality of relayings.
Based on this, a kind of relay transmission method is provided among the present invention, be applied to comprise that in the network system of base station, a plurality of relay station and user terminal, as shown in Figure 3, this method comprises:
Step s301, relay station receive the full detail that the warp that sends the base station is too much described source encoding;
Step s302, relay station be according to relay for packets under this equipment and full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out coded modulation;
The description after with coded modulation of step s303, relay station flows to user terminal and sends, and flows to until description to reach user terminal.
In the application scenarios of the present invention, as shown in Figure 4 in conjunction with the network architecture sketch map of the multiple description coded double bounce junction network of information source, be in UE (the User Equipment at sub-district middle part; User terminal) can directly receive eNB (evolved NodeB; The information of the base station) sending, and the UE of cell edge is through relay station (Relay Node, switching RN); Link to each other with eNB indirectly, receive forwarding data from RN.
Below be example with the down link, the embodiment of the method that provides among the present invention is described.Fig. 4 is the junction network of double bounce, counts N according to multiple description coded description, and relaying is divided into the N group, and relaying is on the same group transmitted the description stream of identical numbering.Suppose that wherein UE is far away apart from eNB, need to communicate by letter with eNB through relaying; MD representes the many descriptors through too much description source encoding, i.e. full detail; MD
i(i=1,2 ..., N) be i multiple description coded description stream; RN representes relay station, RN
iI the relay station of describing stream transmitted in expression.
Generally speaking; ENB can set relay for packets according to the feedback information of UE; And the source content of multimedia carried out the corresponding source encoding of describing according to the relay for packets result more; And multiple description coded result is advanced the body content carry out corresponding many description source encodings, and multiple description coded result is carried out coded modulation according to the relay for packets result.For radio network, because eNB is a mass-sending information, UE does not have based on feedback link, can make the close RN of physical location alternately belong to different packets.At this moment; ENB can pass through fixedly feedback signal acquisition relay for packets result of relaying, and RN works in MDF (Multiple Descriptio n Forward, multiple description encoding is transmitted) pattern; And according to the setting of grouping in advance of RN, on the same group relaying is not transmitted the description stream informations of different numberings.Receiving terminal image restored quality is weighed with PSNR (Peak Signal to Noise Ratio, Y-PSNR).Transmission divides two stages to carry out:
Phase I, the code modulation mode of eNB to configure: QM
ENBAnd Rate
ENB(be respectively the first jump set transmission link, promptly eNB is to the RN link, the corresponding bit number and the code rate of chnnel coding of modulation system) sends MD, with the reception of assurance central user and relay station.RN
iThe information of receiving image is decoded, obtain bit stream information.
Second stage, RN
iBit stream information to decoding obtains is obtained the corresponding descriptor of this relaying, obtains own the MD that will transmit
i, and according to the code modulation mode that configures: QM
ENBAnd Rate
ENB(be respectively second jump set transmission link, the i.e. RN
iTo the UE link, the corresponding bit number of modulation system and the code rate of chnnel coding) to MD
iCarry out coded modulation, forward corresponding results then.
For UE, no matter receive several description streams, can both decode, recover the image of respective quality.
When multiple description coded scheme was confirmed, two-hop link corresponding codes modulation system confirmed that method is following:
Suppose the multiple description coded back of image/video information via MD
iThe bit number ratio that all after multiple description coded are described the bit number of stream with the image/video information via be η, then confirm that according to formula (1) first jumps the code modulation mode with the second jumping link.
η×QM
eNB/Rate
eNB＝QM
RN/Rate
RN (1)
When both can not equate fully, can be through adding character rate unanimity on the feasible assurance of redundant information two links.
In junction network, general eNB is better than RN to the UE link performance to the RN link performance.When RN works in DF (Decode and Forward; Tradition decoding is transmitted) during pattern; In order to guarantee performance through the edge customer of RN access; Jump the lower information rate of employing in the link transmission process second, thereby the transmission rate that has also limited first jumping can cause waste to the capacity of the first jumping link like this.When RN works in the MDF pattern, through mating the coded modulation scheme that link is jumped in first jumping and second, made full use of the capacity of the link of this double bounce, under the prerequisite that guarantees user's receptivity, improved the efficient of images.
Below the relay transmission scheme that relates in the method provided by the invention is carried out emulation and is described simulation result.RN carries out multiple description coded forwarding, in antagonism burst network burst error, improves the efficiency of transmission of image/video.So, take all factors into consideration the efficient and the quality of sending image information, introduce the parameter TP of similar throughput
ImagCarry out comprehensive characterization, be defined as
TP
imag＝L
imag×(1-PER
imag) (2)
In the formula (2):
L
ImagThe token image size can be the row pixel number of piece image, and row pixel number or total pixel number also can be represented with normalized form;
PER
Imag=P (PSNR＜PSNR
Fix), PSNR
FixBe the threshold value that configures, the PSNR that receives image as the user satisfies PSNR＜PSNR
FixThe time to think that image receives undesirable; Otherwise, think that then image receives successfully.
Simple in order to describe, under situation about being without loss of generality, the RN number that makes UE insert is 2, and the concrete simulation parameter of many description stream N=2 is as shown in table 1.
Table 1 simulation parameter
| The eNB antenna number | 1 |
| The RN antenna number | 1 |
| The |
2 |
| Multi-description coding method | Odd even based on pixel is divided frame, and η is 0.5 |
| The quantizing bit number of pixel | 4bit |
| Chnnel coding | Turbo, code check are 1/3 |
Because UE inserts two RN, RN exists MDF and two kinds of forward modes of DF.The corresponding simulation scheme is explained respectively as follows:
When (one) RN worked in the MDF pattern, employed transmission plan sketch map was as shown in Figure 5.ENB mass-sending MD information, to guarantee the reception of central user and relay station, the modulation system of employing is 16QAM (Quadrature Amplitude Modulation, a quadrature amplitude modulation), channel coding rate Rate=1/3.RN carries out demodulation coding with the information of receiving, then information source information is carried out multiple description coded η=0.5, and grouping in advance is provided with the description stream of transmitting reference numeral, i.e. RN according to RN
1Transmit MD
1, RN
2Transmit MD
2The modulation system that adopt this moment becomes QPSK (Quadrature Phase Shift Keying, QPSK), and code rate is constant.UE carries out the signal that receives to carry out the merging of describing behind the demodulation coding more.Because after multiple description coded, information data amount will be for half the, then the character rate of first jumping and the second jumping link remains unchanged.
When (two) RN worked in the DF pattern, employed transmission plan was shown in Fig. 6 sketch map.ENB mass-sending MD information, to guarantee the reception of central user and relay station, the modulation system of employing is QPSK, speed Rate=1/3.RN carries out DF with the information that receives and transmits, and this moment, RN was identical to the RN link with eNB to the code modulation mode of UE link.UE carries out soft information with the information that receives and merges, and obtains diversity gain.
Generally speaking, the first jumping link-quality is better than second jumping link, the i.e. SNR generally speaking
ENB_RN(eNB is to the SNR of RN link) is greater than SNR
RN_UE(RN is to the SNR of UE link).Thereby the SNR of two-hop link carried out the setting of following dual mode:
First kind of mode:
SNR
eNB_RN-SNR
RN_UE＝5dB
The TP that obtains
Imag-SNR
ENB_RNCurve is as shown in Figure 7.PSNR wherein
Fix=24 and 26, under the quantification manner in application scenarios of the present invention, satisfy the PSNR threshold value of the subjective viewing effect of user.
The second way:
SNR
eNB_RN＝20dB
Obtain TP
Imag-SNR
RN_UECurve is as shown in Figure 8.PSNR wherein
Fix=24 and 26, under the quantification manner in application scenarios of the present invention, satisfy the PSNR threshold value of the subjective viewing effect of user.
Can find out by Fig. 7, at SNR
ENB_RN-SNR
RN_UEDuring=5dB, work as SNR
ENB_RNWhen reaching 20dB, the performance that RN works in the MDF mode is superior to RN and works in the DF pattern.Can find out by Fig. 8, at SNR
ENB_RNDuring=20dB, work as SNR
RN_UEWhen reaching 15dB, the performance that RN works in the MDF mode is superior to RN and works in the DF pattern, is consistent with the conclusion of Fig. 7.So in junction network, second jumps better (SNR of link-quality
RN_UEHigher) time, relaying works in multiple description coded forward mode, can effectively improve the throughput of edge customer.
Be that the example specific embodiments of the invention is illustrated with the double bounce junction network in the above application scenarios.When the via node that the relaying number in the network is very big, the user can insert increases, can use other multi-description coding method, the many descriptions fluxion that makes coding come out is the same with the packet count of relaying.In addition, still can confirm to relay well link and the code modulation mode that is relayed to link between the user for the base station by aforementioned formula (1).
The said method that the application of the invention provides, the relay transmission mode of use combining multi-description characteristics of information source can improve the transmission rate of multimedia messages and the robustness of system effectively.The transmission method based on many descriptions source encoding that provides among the present invention especially has very strong perspective and application for the transmission of broadcasting service in the application of wireless cellular network.
A kind of relay transmission system also is provided among the present invention, has comprised base station, a plurality of relay station and user terminal, wherein:
The base station is used for that the source content of multimedia is carried out describe more and obtains full detail after the source encodings and send to all relay stations;
Relay station is used to receive the full detail that the warp that sends the base station is too much described source encoding; And, obtain the description stream corresponding with affiliated relay for packets according to affiliated relay for packets and full detail; The description of obtaining is flowed to user terminal send, flow to until description and reach user terminal;
User terminal is used for carrying out the decoding based on many descriptions according to the description stream that receives from different relay stations, obtains the full detail and the source content of multimedia that reduces that send the base station.
The present invention also provides a kind of base station, is applied to comprise that in the network system of base station, a plurality of relay station and user terminal, as shown in Figure 9, this base station comprises:
Central dispatching unit 10 is used to receive the relay for packets result that relay station feeds back;
The source encoding unit 20 of describing are used for the source content of multimedia is carried out corresponding many description source encodings according to the relay for packets result, and multiple description coded result are carried out coded modulation more;
Transmitting element 30 is used for being sent to all relay stations through the full detail after the coded modulation.
The present invention also provides a kind of relay station, and relay station is applied to comprise that in the network system of base station, a plurality of relay station and user terminal, shown in figure 10, this relay station comprises:
Receiving element 40 is used to receive the full detail that the warp that sends the base station is too much described source encoding;
Processing unit 50 is used for the full detail that receives according to the relay for packets under this equipment and receiving element 10-, obtain with this equipment under the corresponding description of relay for packets flow and carry out coded modulation; Concrete, 50 pairs of full details that receive from the base station of processing unit are decoded, and obtain bit stream information; The bit stream information that more said decoding is obtained is carried out the sampling that known fixed is described rule, obtain with this equipment under the corresponding description of relay for packets stream; At last to this equipment under the corresponding description of relay for packets stream carry out coded modulation.
Transmitting element 60 is used for that the description that processing unit 50 obtains is flowed to user terminal and sends, and flows to until description to reach user terminal.
Wherein, also comprise:
Divide into groups to confirm unit 70; Be used for according to the results that a plurality of relay stations is divided into the relay for packets that belongs to different; Obtain the relay for packets under self and offer processing unit 50, the dividing mode of relay for packets be static setting, or dynamically adjusts according to preset period.For example, in radio network, because the base station is a mass-sending information, UE does not have based on feedback link, can make the close RN of physical location alternately belong to different packets.
Modulation coding mode acquiring unit 80; Be used for flowing the bit number that each bar is described stream according to describe more; With ratio, confirm in the base station code modulation mode to the link between the relay station and relay station to the link between the user terminal to the contained bit number of full detail.And the code modulation mode that gets access to offered receiving element 40, processing unit 50 and transmitting element 60.
Said system that the application of the invention provides and equipment, the relay transmission mode of use combining multi-description characteristics of information source can improve the transmission rate of image information and the robustness of system effectively.The transmission method based on many descriptions source encoding that provides among the present invention especially has very strong perspective and application for the transmission of broadcasting service in the application of wireless cellular network.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize through hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding; Technical scheme of the present invention can be come out with the embodied of software product, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk; Portable hard drive etc.) in; Comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the sketch map of a preferred embodiment, unit in the accompanying drawing or flow process might not be that embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the unit in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.A unit can be merged in the unit of the foregoing description, also can further split into a plurality of subelements.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
Claims (9)
1. the relay transmission method of a combining multi-description characteristics of information source is characterized in that, is applied to comprise that said method comprises in the network system of base station, a plurality of relay station and user terminal:
What said relay station received that said base station sends carrying out the full details that source encodings and coded modulation obtain of describing with the source content of multimedia according to the relay for packets result more;
Said relay station is decoded to the full detail that receives, and obtains bit stream information;
Said relay station carries out the sampling that known fixed is described rule to the bit stream information that said decoding obtains, obtain with this equipment under the corresponding description of relay for packets stream;
Said relay station carries out coded modulation to the said description stream that gets access to;
The description of said relay station after with said coded modulation flows to user terminal and sends, and flows to until said description to reach said user terminal.
2. the method for claim 1 is characterized in that, said relay station also comprises before receiving the full detail that sends said base station:
A plurality of relay stations are divided into the relay for packets that belongs to different, and the dividing mode of said relay for packets is static the setting, or dynamically adjusts according to preset period.
3. the method for claim 1 is characterized in that, also comprises:
The bit number of stream is described according to each bar in many description streams; With ratio, confirm in said base station link between the said relay station and said relay station code modulation mode to the link between the said user terminal to the contained bit number of said full detail.
4. the method for claim 1 is characterized in that, also comprises:
Said user terminal carries out the decoding based on many descriptions according to the description stream that receives from different relay stations, obtains the full detail and the source content of multimedia that reduces that send said base station.
5. a relay transmission system is characterized in that, comprises base station, a plurality of relay station and user terminal, wherein:
Said base station is used for the source content of multimedia is carried out obtaining full detail after many description source encodings, and sends to all relay stations;
Said relay station is used to receive that said base station sends that the source content of multimedia is carried out the full details that source encodings and coded modulation obtain of describing according to the relay for packets result more; And the full detail that receives decoded, obtain bit stream information; And the bit stream information that said decoding obtains carried out the sampling that known fixed is described rule, obtain with said relay station under the corresponding description stream of relay for packets; And the description that gets access to said stream carries out coded modulation; Description after the said coded modulation is flowed to user terminal send, flow to until said description and reach said user terminal;
Said user terminal is used for carrying out the decoding based on many descriptions according to the description stream that receives from different relay stations, obtains the full detail and the source content of multimedia that reduces that send said base station.
6. a base station is characterized in that, said base station applies is in the network system that comprises base station, a plurality of relay station and user terminal, and said base station comprises:
The central dispatching unit is used to receive the relay for packets result that relay station feeds back;
The source encoding unit of describing are used for the source content of multimedia is carried out corresponding many description source encodings according to said relay for packets result, and multiple description coded result are carried out coded modulation more;
Transmitting element is used for being sent to all relay stations with said through the full detail after the coded modulation.
7. a relay station is characterized in that, said relay station is applied to comprise that said relay station comprises in the network system of base station, a plurality of relay station and user terminal:
Receiving element is used to receive that said base station sends that the source content of multimedia is carried out the full details that source encodings and coded modulation obtain of describing according to the relay for packets result more;
Processing unit is used for the full detail that receives is decoded, and obtains bit stream information; Bit stream information to said decoding obtains is carried out the sampling that known fixed is described rule, obtain with this equipment under the corresponding description of relay for packets stream; The said description stream that gets access to is carried out coded modulation;
Transmitting element is used for that the description after the said processing unit coded modulation is flowed to user terminal and sends, and flows to until said description to reach said user terminal.
8. relay station as claimed in claim 7 is characterized in that, also comprises:
Divide into groups to confirm the unit, be used for that obtain self affiliated relay for packets, the dividing mode of said relay for packets is static the setting, or dynamically adjusts according to preset period according to the results that a plurality of relay stations is divided into the relay for packets that belongs to different.
9. the relay station described in claim 8 is characterized in that, also comprises:
The modulation coding mode acquiring unit; Be used for flowing the bit number that each bar is described stream according to describe more; With ratio, confirm in said base station link between the said relay station and said relay station code modulation mode to the link between the said user terminal to the contained bit number of said full detail.
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| CN103716278B (en) * | 2012-09-28 | 2016-12-28 | 上海贝尔股份有限公司 | Delamination Transmission in relay communications system |
| US9692579B2 (en) | 2014-08-05 | 2017-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple description media broadcast aided by a secondary base station |
| CN107948115A (en) * | 2016-10-12 | 2018-04-20 | 蔡育仁 | Cooperative multimedia communication method and its system |
| CN109922533B (en) * | 2019-04-04 | 2022-07-22 | 海能达通信股份有限公司 | Data transmission method, multicast coordination entity equipment, base station equipment and eMBMS system |
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| CN101505206A (en) * | 2008-02-04 | 2009-08-12 | 上海贝尔阿尔卡特股份有限公司 | Relay method, base station and user equipment for combined analog network coding |
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