CN101820327A - 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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- CN101820327A CN101820327A CN200910259481A CN200910259481A CN101820327A CN 101820327 A CN101820327 A CN 101820327A CN 200910259481 A CN200910259481 A CN 200910259481A CN 200910259481 A CN200910259481 A CN 200910259481A CN 101820327 A CN101820327 A CN 101820327A
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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 (MultipleDescription Coding) of many descriptions about video coding.
Based on the hierarchical coding of multiresolution, by orthogonal transforms such as wavelet transformation, DCT (Discrete CosineTransform, discrete cosine) conversion video is divided into basic layer and enhancement layer: 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 terminal, if channel performance is poor excessively, the partial information of enhancement layer can abandon.This class 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 original image or video are divided into several equivalences, and wherein each part is called a description, and each has stronger correlation between describing.Each description is sent to receiving terminal by different network paths.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 schematic diagram of multi-description coding-decoding model becomes a plurality of descriptions with same picture breakdown as shown in Figure 1, and each is described absolute coding and is transferred to decoder by different channels, and decoder can be decoded to the description stream of any number.
In the prior art, the schematic diagram of honeycomb junction network by " multi-hop " technology is incorporated existing cellular network (calling conventional cellular network again), has shortened the communication distance between communication node as shown in Figure 2, has improved the quality and the channel capacity of communication link.Therefore, the honeycomb junction network can improve cell coverage area, strengthen cell capacity, satisfies mobile system of future generation effectively to the covering requirement of interior high-rate service on a large scale.
Problems of the prior art are:
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, uses considerably less in wireless network.
Summary of the invention
The invention provides a kind of relay transmission method, system and equipment of combining multi-description characteristics of information source, be 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 described method comprises in the network system of base station, a plurality of relay station and user terminal:
Described relay station receives the full detail that warp that described base station sends is too much described source encoding;
Described relay station is according to relay for packets under this equipment and described full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out modulating-coding;
The description of described relay station after with described modulating-coding flows to user terminal and sends, and flows to until described description to reach described user terminal.
Wherein, described relay station also comprises before receiving the full detail of described base station transmission:
A plurality of relay stations are divided into the relay for packets that belongs to different, and the dividing mode of described relay for packets is static the setting, or dynamically adjusts according to preset period; Described base station carries out correspondingly describing source encoding according to source content of multimedia and described relay for packets result more, and multiple description coded result is carried out modulating-coding obtains full detail.
Wherein, described relay station is according to relay for packets under this equipment and described full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out coded modulation, comprising:
Described relay station is decoded to the full detail that receives, and obtains bit stream information;
Described relay station carries out the sampling that known fixed is described rule to the bit stream information that described decoding obtains, obtain with this equipment under the corresponding description of relay for packets stream;
Described relay station carries out modulating-coding to the described description stream that gets access to.
Wherein, also comprise:
According to the described bit numbers of describing each bar description stream in the stream more, with ratio, determine to arrive to link between the described relay station and described relay station the modulation coding mode of the link between the described user terminal in described base station to the contained bit number of described full detail.
Wherein, also comprise:
Described 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 described base station sends.
The present invention also provides a kind of relay transmission system, comprises base station, a plurality of relay station and user terminal, wherein:
Described 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;
Described relay station is used to receive the full detail that warp that described base station sends is too much described source encoding; And, obtain and the described affiliated corresponding description stream of relay for packets according to affiliated relay for packets and described full detail; Described description of obtaining is flowed to user terminal send, flow to until described description and reach described user terminal;
Described 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 described base station sends.
The present invention also provides a kind of base station, and described base station applies is in the network system that comprises base station, a plurality of relay station and user terminal, and described 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 described relay for packets result, and multiple description coded result are carried out modulating-coding more;
Transmitting element is used for being sent to all relay stations with described through the full detail behind the modulating-coding.
The present invention also provides a kind of relay station, and described relay station is applied to comprise that described relay station comprises in the network system of base station, a plurality of relay station and user terminal:
Receiving element is used to receive the full detail that warp that described base station sends is too much described source encoding;
Processing unit is used for the full detail that receives according to the relay for packets under this equipment and described receiving element, obtain with this equipment under the corresponding description stream of relay for packets and carry out modulating-coding;
Transmitting element is used for that the description behind the described processing unit modulating-coding is flowed to user terminal and sends, and flows to until described description to reach described user terminal.
Wherein, also comprise:
The grouping determining unit is used for according to the division result who a plurality of relay stations is divided into the relay for packets that belongs to different, obtains self affiliated relay for packets, and the dividing mode of described relay for packets is static the setting, or dynamically adjusts according to preset period.
Wherein, described processing unit specifically is used for:
The full detail that receives is decoded, obtain bit stream information;
The bit stream information that described 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 described description stream that gets access to is carried out modulating-coding.
Wherein, also comprise:
The modulation coding mode acquiring unit, be used for according to the described bit numbers that each bar of stream is described stream of describing more, with ratio, determine to arrive to link between the described relay station and described relay station the modulation coding mode of the link between the described user terminal in described base station to the contained bit number of described 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, apparently, 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, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of multi-description coding-decoding model in the prior art;
Fig. 2 is the schematic diagram 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 schematic diagram 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 schematic diagram;
Fig. 6 is when RN works in the DF pattern in the application scenarios of the present invention, employed transmission plan schematic diagram;
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
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
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 may have two even multilink, for multiple description coded application in junction network provides condition to the user by 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:
The warp that step s301, relay station reception base station send is too much described the full detail of 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 modulating-coding;
The description after with modulating-coding 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, in conjunction with the network architecture schematic diagram of the multiple description coded double bounce junction network of information source as shown in Figure 4, be in UE (the User Equipment at middle part, sub-district, user terminal) can directly receive eNB (evolved NodeB, the base station) information of Fa Songing, and the UE of cell edge is by 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 by relaying; MD represents 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 represents 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 is carried out corresponding many description source encodings according to the relay for packets result, and multiple description coded result is carried out modulating-coding.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 groupings.At this moment, eNB can by relaying fixedly feedback signal obtain the relay for packets result, RN works in MDF (Multiple Description Forward, multiple description encoding is transmitted) pattern, and according to the setting of grouping in advance of RN, relaying is not on the same group transmitted the description stream information of different numberings.Receiving terminal image restored quality is weighed with PSNR (Peak Signal to NoiseRatio, Y-PSNR).Transmission divides two stages to carry out:
Phase I, the modulation coding 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 bit number of modulation system correspondence and the code rate of chnnel coding) send MD, to guarantee the reception of central user and relay station.RN
iThe information of receiving image is decoded, obtain bit stream information.
Second stage, RN
iThe bit stream information that decoding obtains is obtained the corresponding descriptor of this relaying, obtain the own MD that will transmit
i, and according to the modulation coding mode that configures: QM
ENBAnd Rate
ENB(be respectively second jump set transmission link, the i.e. RN
iTo the UE link, the bit number of modulation system correspondence and the code rate of chnnel coding) to MD
iCarry out coded modulation, then corresponding results is forwarded.
For UE, no matter receive several description streams, can both decode, recover the image of respective quality.
When multiple description coded scheme was determined, two-hop link corresponding codes modulation system determined that method is as follows:
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 determine that according to formula (1) first jumps and the modulation coding mode of the second jumping link.
η×QM
eNB/Rate
eNB＝QM
RN/Rate
RN????(1)
When both can not equate fully, can be by 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 by the edge customer of RN access, jump the lower information rate of employing in the link transmission process second, can cause waste to first capacity of jumping link like this thereby also limited first transmission rate of jumping.When RN works in the MDF pattern, by mating the Modulation and Coding 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 that send 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 a 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 UE antenna number | ??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.Corresponding simulating scheme is respectively described below:
When (one) RN worked in the MDF pattern, employed transmission plan schematic diagram 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 ShiftKeying, Quadrature Phase Shift Keying), 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 half, then first jumping and second character rate of jumping link remain unchanged.
When (two) RN worked in the DF pattern, employed transmission plan was shown in Fig. 6 schematic diagram.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 modulation coding 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 is 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 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 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.
As seen from Figure 7, at SNR
ENB_RN-SNR
RN_UEDuring=5dB, work as SNR
EN_BNWhen reaching 20dB, the performance that RN works in the MDF mode is better than RN and works in the DF pattern.As seen from Figure 8, at SNR
ENB_RNDuring=20dB, work as SNR
RN_UEWhen reaching 15dB, the performance that RN works in the MDF mode is better than 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 example is illustrated the specific embodiment of the present invention with the double bounce junction network in the above application scenarios.When the via node that the relaying number is very big, the user can insert in the network 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 determine to relay well link and the modulation coding 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 warp that the base station sends 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 the base station sends.
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 modulating-coding more;
Transmitting element 30 is used for and will be sent to all relay stations through the full detail behind the modulating-coding.
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, as shown in figure 10, this relay station comprises:
Receiving element 40 is used to receive the full detail that warp that the base station sends 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 stream of relay for packets and carry out modulating-coding; 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 described decoding is obtained is carried out the sampling that known fixed is described rule again, obtain with this equipment under the corresponding description of relay for packets stream; At last to this equipment under the corresponding description stream of relay for packets carry out modulating-coding.
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:
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, determine in the base station modulation coding 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 modulation coding 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 above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by 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 embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, 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 schematic diagram of a preferred embodiment, unit in the accompanying drawing or flow process might not be that enforcement 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 (11)
1. the relay transmission method of a combining multi-description characteristics of information source is characterized in that, is applied to comprise that described method comprises in the network system of base station, a plurality of relay station and user terminal:
Described relay station receives the full detail that warp that described base station sends is too much described source encoding;
Described relay station is according to relay for packets under this equipment and described full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out modulating-coding;
The description of described relay station after with described modulating-coding flows to user terminal and sends, and flows to until described description to reach described user terminal.
2. the method for claim 1 is characterized in that, described relay station also comprises before receiving the full detail of described base station transmission:
A plurality of relay stations are divided into the relay for packets that belongs to different, and the dividing mode of described relay for packets is static the setting, or dynamically adjusts according to preset period; Described base station carries out the source content of multimedia correspondingly to describe source encoding according to described relay for packets result more, and multiple description coded result is carried out modulating-coding obtains full detail.
3. the method for claim 1 is characterized in that, described relay station is according to relay for packets under this equipment and described full detail, obtain with this equipment under the corresponding description stream of relay for packets and carry out coded modulation, comprising:
Described relay station is decoded to the full detail that receives, and obtains bit stream information;
Described relay station carries out the sampling that known fixed is described rule to the bit stream information that described decoding obtains, obtain with this equipment under the corresponding description of relay for packets stream;
Described relay station carries out modulating-coding to the described description stream that gets access to.
4. method as claimed in claim 3 is characterized in that, also comprises:
According to the described bit numbers of describing each bar description stream in the stream more, with ratio, determine to arrive to link between the described relay station and described relay station the modulation coding mode of the link between the described user terminal in described base station to the contained bit number of described full detail.
5. the method for claim 1 is characterized in that, also comprises:
Described 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 described base station sends.
6. a relay transmission system is characterized in that, comprises base station, a plurality of relay station and user terminal, wherein:
Described 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;
Described relay station is used to receive the full detail that warp that described base station sends is too much described source encoding; And, obtain and the described affiliated corresponding description stream of relay for packets according to affiliated relay for packets and described full detail; Described description of obtaining is flowed to user terminal send, flow to until described description and reach described user terminal;
Described 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 described base station sends.
7. a base station is characterized in that, described base station applies is in the network system that comprises base station, a plurality of relay station and user terminal, and described 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 described relay for packets result, and multiple description coded result are carried out modulating-coding more;
Transmitting element is used for being sent to all relay stations with described through the full detail behind the modulating-coding.
8. a relay station is characterized in that, described relay station is applied to comprise that described relay station comprises in the network system of base station, a plurality of relay station and user terminal:
Receiving element is used to receive the full detail that warp that described base station sends is too much described source encoding;
Processing unit is used for the full detail that receives according to the relay for packets under this equipment and described receiving element, obtain with this equipment under the corresponding description stream of relay for packets and carry out modulating-coding;
Transmitting element is used for that the description behind the described processing unit modulating-coding is flowed to user terminal and sends, and flows to until described description to reach described user terminal.
9. relay station as claimed in claim 8 is characterized in that, also comprises:
The grouping determining unit is used for according to the division result who a plurality of relay stations is divided into the relay for packets that belongs to different, obtains self affiliated relay for packets, and the dividing mode of described relay for packets is static the setting, or dynamically adjusts according to preset period.
10. relay station as claimed in claim 8 is characterized in that, described processing unit specifically is used for:
The full detail that receives is decoded, obtain bit stream information;
The bit stream information that described 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 described description stream that gets access to is carried out modulating-coding.
11. the relay station described in claim 9 is characterized in that, also comprises:
The modulation coding mode acquiring unit, be used for according to the described bit numbers that each bar of stream is described stream of describing more, with ratio, determine to arrive to link between the described relay station and described relay station the modulation coding mode of the link between the described user terminal in described base station to the contained bit number of described full detail.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016020793A1 (en) * | 2014-08-05 | 2016-02-11 | Telefonaktiebolaget L M Ericsson (Publ) | Multiple description media broadcast aided by a secondary base station |
| CN103716278B (en) * | 2012-09-28 | 2016-12-28 | 上海贝尔股份有限公司 | Delamination Transmission in relay communications system |
| CN107948115A (en) * | 2016-10-12 | 2018-04-20 | 蔡育仁 | Cooperative multimedia communication method and its system |
| CN109922533A (en) * | 2019-04-04 | 2019-06-21 | 海能达通信股份有限公司 | Data transmission method, multicast coordination entity equipment, base station equipment and eMBMS system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505206B (en) * | 2008-02-04 | 2013-03-13 | 上海贝尔股份有限公司 | Relay method, base station and user equipment for combined analog network coding |
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2009
- 2009-12-22 CN CN2009102594817A patent/CN101820327B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103716278B (en) * | 2012-09-28 | 2016-12-28 | 上海贝尔股份有限公司 | Delamination Transmission in relay communications system |
| WO2016020793A1 (en) * | 2014-08-05 | 2016-02-11 | Telefonaktiebolaget L M Ericsson (Publ) | Multiple description media broadcast aided by a secondary base station |
| CN106664132A (en) * | 2014-08-05 | 2017-05-10 | 瑞典爱立信有限公司 | Multiple description media broadcast aided by a secondary base station |
| US9692579B2 (en) | 2014-08-05 | 2017-06-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Multiple description media broadcast aided by a secondary base station |
| CN106664132B (en) * | 2014-08-05 | 2020-05-19 | 瑞典爱立信有限公司 | Multiple description media broadcast assisted by secondary base station |
| CN107948115A (en) * | 2016-10-12 | 2018-04-20 | 蔡育仁 | Cooperative multimedia communication method and its system |
| CN109922533A (en) * | 2019-04-04 | 2019-06-21 | 海能达通信股份有限公司 | Data transmission method, multicast coordination entity equipment, base station equipment and eMBMS 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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| Publication number | Publication date |
|---|---|
| CN101820327B (en) | 2012-11-07 |
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