CN101465829A - Method and apparatus for transmitting and receiving layered modulation data - Google Patents
Method and apparatus for transmitting and receiving layered modulation data Download PDFInfo
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- CN101465829A CN101465829A CNA2007100327846A CN200710032784A CN101465829A CN 101465829 A CN101465829 A CN 101465829A CN A2007100327846 A CNA2007100327846 A CN A2007100327846A CN 200710032784 A CN200710032784 A CN 200710032784A CN 101465829 A CN101465829 A CN 101465829A
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Abstract
The embodiment of the invention discloses a hierarchical modulated data transmitting and receiving method and a device thereof; wherein the hierarchical modulation signal transmitting method includes the following steps: receiving the base-hierarchy data and the reinforced-hierarchy data formed after hierarchical modulation by a base station from a base station; picking up the reinforced-hierarchy data from the base-hierarchy data and the reinforced-hierarchy data formed after the hierarchical modulation by the base station; and sending the picked reinforced-hierarchy data to a terminal. The terminal far from the base station within the coverage of the base station receives the reinforced-hierarchy data formed after the hierarchical modulation by the base station from a relay station, and receives base-hierarchy data formed after the hierarchical modulation by the base station from the base station. Therefore, the hierarchical modulation signal transmitting and receiving method and the device can realize that the terminal far from the base station within the coverage of the base station can receive the base-hierarchy data and the reinforced-hierarchy data formed after the hierarchical modulation by the base station from the base station at the same time while saving frequency spectrum resources.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of hierarchical modulated data transmitting, method of reseptance and equipment.
Background technology
Increasingly mature and business-like popularization along with wireless communication technology.Cellular mobile communication, WLAN (wireless local area network), wireless communication means such as wireless MAN be widely used in that people produce and life in every field, for people link up anywhere or anytime and the more and more conveniently means that provide are provided.Mobile communication technology has experienced first generation simulation mobile communication (1G), second generation digital mobile communication system (2G), and the third generation multimedia mobile communication system (3G) that is growing at top speed up till now again is to super 3G and the development of 4G wide-band mobile communication system.
Wide-band mobile communication system is that the indexs such as bandwidth, transmission rate and time-delay of equipment are had higher requirement.So orthogonal frequency division multiplexi (Orthogonal Frequency Division Multiplexing, OFDM), MIMO technique (Multiple Input Multiple Output, MIMO), relaying technique, high order modulation technology etc. are introduced among the new system one after another, as the means that improve systematic function.
Digital modulation is a basic fundamental of modern communications, digital modulation technique commonly used at present comprises quarternary phase-shift keying (QPSK) (Quaternary Phase Shit Keying, QPSK), eight phase phase shift keyings (8 Phase ShitKeying, 8PSK), 16 quadrature amplitude modulation (16 Quadrature Amplitude Modulation, 16QAM), 64QAM etc.In general, to the signal of equal-wattage emission, order of modulation is high more, and the coverage that its signal is propagated is short more.But in its coverage, its availability of frequency spectrum of signal that order of modulation is high more is high more.For example, 64QAM can provide the very high availability of frequency spectrum, i.e. transmission rate.But its coverage that is suitable for is smaller; The availability of frequency spectrum of QPSK is lower, but uses the QPSK transmission can cover very big scope.Therefore, use above-mentioned any modulation system, all can not bring the maximization of the availability of frequency spectrum and coverage simultaneously.
In order to address the above problem, hierarchical modulation technology has been proposed, in hierarchical modulation, data to be sent are divided into base layer data and enhancement data.Wherein base layer data is in the basic layer transmission of modulation symbol, and enhancement data is in the enhancement layer transmission of modulation symbol.The combination of basic layer-enhancement layer can be any two kinds of data-modulated modes, such as: QPSK-QPSK, QPSK-16QAM, 16QAM-QPSK etc.And the planisphere of enhancement layer can carry out the skew of certain angle, to obtain the maximization of modulation code distance.That shown in Figure 1 is a kind of QPSK-QPSK layered modulation constellation figure.As shown in Figure 1, the data of transmission comprise base layer data and enhancement data.The information of four bits of hierarchical modulation employing (such as, abcd), wherein, base layer data occupies ab, and enhancement data occupies cd.Adopt after the hierarchical modulation,,, therefore can obtain higher data speed owing to can all solve base layer data ab and enhancement data cd for the nearer user in distance base station; And,, only can solve the data ab of basic layer because it receives quality of signals and descends for distance base station user far away, therefore can only obtain lower data rate.But base layer data is compared with enhancement data, has coverage far away.
The characteristics of multi-media broadcasting service are that the base station adopts Wireless transmission mode to provide service for all terminals in the coverage, so the base station will send identical information for these terminals.When adopting conventional modulated mode (as QPSK, 16QAM etc.), because the quality of reception of remote subscriber is relatively poor, therefore all users can both obtain service smoothly in the coverage in order to make, and can not use the modulation of higher-order, as 64QAM.Though near-end user can reach the quality of reception preferably like this, also can only use lower order of modulation, as QPSK.Like this, just frequency spectrum resource has been caused certain waste.
After adopting hierarchical modulation, just can solve the problems referred to above.See also Fig. 2, the base station adopts broadcast mode all terminals (comprising proximal terminal and distance terminal) in coverage to send base layer data and the enhancement data that forms after the hierarchical modulation of base station, concerning near-end user, it can receive the data of basic layer and enhancement layer from broadcast, just can enjoy data transfer rate preferably, be equivalent to use high order modulation.Concerning remote subscriber, can only from broadcast, receive the data of basic layer, data transfer rate reduces, and is equivalent to use low-order-modulated, has improved spectrum utilization efficiency.Hierarchical modulation has two kinds of typical cases to use in multimedia broadcasting.The one, transmit different business datums at basic layer respectively with enhancement layer, as different TV programme.Like this, near-end user can be watched all TV programme, and remote subscriber can only be watched partial TV programs; The 2nd, send the different pieces of information (as the odd-numbered frame and the even frame of a TV programme) of same business at basic layer and enhancement layer.Like this, near-end user can be watched high-quality TV programme, and the television program quality that remote subscriber is watched is not watched but do not influence smoothly with regard to lower (data of half).
Although hierarchical modulation can improve the overall spectrum utilance in the base station range greatly, yet,, therefore can not be served preferably owing to can only receive the data that basic layer sends for Cell Edge User.In order to improve the service quality of Cell Edge User, introduce relay station and assist base station work.The effect of relay station mainly is to receive the signal that base station or terminal are sent earlier, gives terminal or base station with the data forwarding that receives then.The base station is that terminal is served by relay station, can improve service quality, and expands the coverage area.For the user of cell edge, if near relay station is arranged, then data rate can be improved.For the user outside the base station range, relay station plays the effect of a data bridge, has been equivalent to enlarge the coverage of base station.
Fig. 3 is the hierarchical modulation transmission method schematic diagram that employing at present strengthens by relaying, as shown in Figure 3, the relay station that covers the edge in the base station receives basic layer and the enhancement data that the base station sends, and the basic layer that will receive and the enhancement data terminal that is transmitted to its service; Wherein, terminal receives only the data that relay station is transmitted, and does not receive the hierarchical modulated data that the base station sends.The prior art, transmit data by the relay station that is arranged on base station and terminal room, make the service of remote subscriber energy enjoy high quality, but, adopt the base layer data of lower-order number modulation to have very wide coverage in the base station, the user can directly receive the base layer data that sends from the base station, and terminal only receives the data of relay station in the prior art scheme, cause this part base layer data of base station to be wasted, caused the waste of frequency spectrum resource.
Summary of the invention
Given this, the embodiment of the invention provides a kind of hierarchical modulated data transmitting, method of reseptance and equipment.Can make the terminal far away in the base station range, can receive the base layer data and the enhancement data that after the base station hierarchical modulation is handled, form simultaneously, save frequency spectrum resource apart from the base station.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of hierarchical modulated data transmitting method, and this comprises:
Receive base layer data and the enhancement data that after the hierarchical modulation of base station, forms from the base station;
From described base layer data that after the hierarchical modulation of base station, forms and enhancement data, extract described enhancement data;
Send the enhancement data of described extraction to terminal.
Accordingly, the embodiment of the invention provides a kind of hierarchical modulated data method of reseptance, and this method comprises:
Receive first hierarchical modulated data from relay station, described first hierarchical modulated data comprises the enhancement data that forms at least after the hierarchical modulation of base station;
Receive the base layer data that after the hierarchical modulation of base station, forms from the base station.
Accordingly, the embodiment of the invention provides a kind of relay station, and this relay station comprises:
Receiving element is used for the base layer data and the enhancement data that form from the base station reception after the hierarchical modulation of base station;
Extraction unit is used for extracting described enhancement data from described base layer data that forms and enhancement data after the hierarchical modulation of base station;
Transmitting element is used for sending to terminal the enhancement data of described extraction.
Accordingly, the embodiment of the invention provides a kind of terminal, and this terminal comprises:
Second receiving element is used for receiving first hierarchical modulated data from relay station, and described first hierarchical modulated data comprises the enhancement data that forms at least after the hierarchical modulation of base station;
The 3rd receiving element is used for the base layer data that forms from the base station reception after the hierarchical modulation of base station.
The embodiment of the invention receives the enhancement data that forms after the base station hierarchical modulation is handled from relay station in base station range and apart from base station terminal at a distance, receive the base layer data that after the base station hierarchical modulation is handled, forms from the base station, can make the terminal far away in the base station range apart from the base station, can receive the base layer data and the enhancement data that after the base station hierarchical modulation is handled, form simultaneously, save frequency spectrum resource.
Description of drawings
Fig. 1 is QPSK-QPSK layered modulation constellation figure;
Fig. 2 is existing hierarchical modulated data transmitting method schematic diagram;
Fig. 3 is the existing hierarchical modulated data transmitting method schematic diagram that strengthens by relay station;
Fig. 4 is an example structure schematic diagram of mobile communication system of the present invention;
Fig. 5 is an embodiment schematic flow sheet of hierarchical modulated data transmitting of the present invention;
Fig. 6 is another example structure schematic diagram of mobile communication system of the present invention;
Fig. 7 is another embodiment schematic flow sheet of hierarchical modulated data transmitting of the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below the embodiment of the invention is further described with reference to accompanying drawing.
The embodiment of the invention in base station range apart from base station terminal at a distance, receive the enhancement data that after the base station hierarchical modulation is handled, forms from relay station, receive the base layer data that after the base station hierarchical modulation is handled, forms from the base station, can make the terminal far away in the base station range apart from the base station, can receive the base layer data and the enhancement data that after the base station hierarchical modulation is handled, form simultaneously, save frequency spectrum resource.Hierarchical modulated data transmission, transmission, method of reseptance and the corresponding apparatus of the embodiment of the invention can be applicable to multi-media broadcasting service, multimedia multicast service, also can be applied to unicast service.
Fig. 4 is an example structure schematic diagram of mobile communication system of the present invention; As shown in Figure 4, the mobile communication system of present embodiment comprises base station 10, relay station 12 and terminal 13 (far away apart from the base station), wherein,
Fig. 5 is an embodiment schematic flow sheet of hierarchical modulated data transmitting of the present invention; This figure has schematically illustrated in the base station range and apart from the method for base station than the terminal reception hierarchical modulated data of distant place, in conjunction with Fig. 5, the concrete steps of the hierarchical modulated data transmitting of present embodiment are described below:
Relaying step, relay station receive enhancement data and the base layer data that forms after the hierarchical modulation of base station from the base station, extract enhancement data wherein, and send the described enhancement data of extracting to terminal.
Receiving step, terminal receives the enhancement data (first hierarchical modulated data) that forms from relay station after the hierarchical modulation of base station, and receives the base layer data that forms from the base station after the hierarchical modulation of base station.
Terminal receives the enhancement data that forms in the hierarchical modulated data transmitting method of present embodiment after the hierarchical modulation of base station from relay station, receive the base layer data that after the hierarchical modulation of base station, forms from the base station, avoid the waste of the base layer data of base station, saved frequency spectrum resource.
Fig. 6 is another example structure schematic diagram of mobile communication system of the present invention; As shown in Figure 6, the mobile communication system of present embodiment comprises base station 30, relay station 32 and terminal 33 (far away apart from the base station), wherein,
Fig. 7 is another embodiment schematic flow sheet of hierarchical modulated data transmitting of the present invention; This figure has schematically illustrated in the base station range and apart from the method for base station than the terminal reception hierarchical modulated data of distant place, in conjunction with Fig. 7, the concrete steps of the hierarchical modulated data transmitting of present embodiment are described below:
Relaying step, relay station receive enhancement data and the base layer data that forms after the hierarchical modulation of base station from the base station, and send described enhancement data that receives and base layer data to terminal.In the specific implementation, for further improving the availability of frequency spectrum, relay station also can carry out sending after hierarchical modulation is handled to described enhancement data that receives and base layer data again.
Receiving step, terminal receives enhancement data and the base layer data (first hierarchical modulated data) that forms after the hierarchical modulation of base station from relay station, receive the base layer data that after the hierarchical modulation of base station, forms from the base station, and to the base layer data that receives from relay station with carry out receive diversity from the base layer data of base station and merge and handle, obtain base layer data.Deversity scheme commonly used comprises space diversity (many antennas), time diversity, frequency diversity etc.; The merging method can for selective synthesizing also, high specific merging, equal gain combining etc.Diversity in the present embodiment then is a kind of diversity of broad sense, and different spaces, time or frequency etc. may have been passed through with the data that relay station sends in the base station, and promptly by different propagation path incoming terminals, terminal merges this two-way unlike signal again.The base layer data that terminal will receive from relay station and after the base layer data that the base station receives merges, obtain new base layer data.It is higher to merge the efficient of handling the base layer data that obtains by diversity.
Terminal receives enhancement data and the base layer data that forms in the hierarchical modulated data transmitting method of present embodiment after the hierarchical modulation of base station from relay station, receive the base layer data that after the hierarchical modulation of base station, forms from the base station, avoid the waste of the base layer data of base station, saved frequency spectrum resource.
More than cited only be preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (10)
1, a kind of hierarchical modulated data transmitting method is characterized in that, comprising:
Receive base layer data and the enhancement data that after the hierarchical modulation of base station, forms from the base station;
From described base layer data that after the hierarchical modulation of base station, forms and enhancement data, extract described enhancement data;
Send the enhancement data of described extraction to terminal.
2, hierarchical modulated data transmitting method as claimed in claim 1 is characterized in that, described terminal is the described base station of a distance terminal at a distance, and simultaneously, this terminal can receive the described base layer data that forms from described base station after the hierarchical modulation of base station.
3, a kind of hierarchical modulated data method of reseptance is characterized in that, comprising:
Receive first hierarchical modulated data from relay station, described first hierarchical modulated data comprises the enhancement data that forms at least after the hierarchical modulation of base station;
Receive the base layer data that after the hierarchical modulation of base station, forms from the base station.
4, hierarchical modulated data method of reseptance as claimed in claim 3 is characterized in that, the enhancement data of described first hierarchical modulated data for forming after the hierarchical modulation of base station.
5, hierarchical modulated data method of reseptance as claimed in claim 3 is characterized in that, described first hierarchical modulated data comprises enhancement data and the base layer data that forms after the hierarchical modulation of base station.
6, hierarchical modulated data method of reseptance as claimed in claim 5 is characterized in that, this method also comprises:
Carry out receive diversity merging processing to the base layer data through forming after the hierarchical modulation of base station in first hierarchical modulated data that receives with from the base layer data that after the hierarchical modulation of base station, forms of base station.
7, a kind of relay station is characterized in that, comprising:
Receiving element is used for the base layer data and the enhancement data that form from the base station reception after the hierarchical modulation of base station;
Extraction unit is used for extracting described enhancement data from base layer data that forms and enhancement data that described receiving element receives after the hierarchical modulation of base station;
Transmitting element is used for sending to terminal the enhancement data of described extraction.
8, relay station as claimed in claim 7 is characterized in that, also comprises:
The hierarchical modulation unit, the base layer data that forms after the hierarchical modulation of base station and the enhancement data that are used for described receiving element is received are carried out the hierarchical modulation processing.
9, a kind of terminal is characterized in that, comprising:
Second receiving element is used for receiving first hierarchical modulated data from relay station, and described first hierarchical modulated data comprises the enhancement data that forms at least after the hierarchical modulation of base station;
The 3rd receiving element is used for the base layer data that forms from the base station reception after the hierarchical modulation of base station.
10, terminal as claimed in claim 9 is characterized in that, described first hierarchical modulated data comprises enhancement data and the base layer data that forms after the hierarchical modulation of base station, and this terminal also comprises:
Diversity merges processing unit, be used for to described first hierarchical modulated data that receives through forming after the hierarchical modulation of base station base layer data and carry out receive diversity from the base layer data that after the hierarchical modulation of base station, forms of base station and merge and handle.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100327846A CN101465829A (en) | 2007-12-21 | 2007-12-21 | Method and apparatus for transmitting and receiving layered modulation data |
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| CNA2007100327846A CN101465829A (en) | 2007-12-21 | 2007-12-21 | Method and apparatus for transmitting and receiving layered modulation data |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104833A (en) * | 2009-12-18 | 2011-06-22 | 上海贝尔股份有限公司 | MBMS service transmission method and system based on layered modulation scheme |
| CN104079357A (en) * | 2014-06-26 | 2014-10-01 | 上海交通大学 | Optical network system spectrum efficiency optimization method and device based on layering modulation |
| WO2015172427A1 (en) * | 2014-05-14 | 2015-11-19 | 华为技术有限公司 | Signal transmission method and device |
| CN103716278B (en) * | 2012-09-28 | 2016-12-28 | 上海贝尔股份有限公司 | Delamination Transmission in relay communications system |
| CN107409115A (en) * | 2015-03-19 | 2017-11-28 | 高通股份有限公司 | Method and apparatus for alleviating the resource contention between ultralow stand-by period (ULL) and old-fashioned transmission |
| CN107948115A (en) * | 2016-10-12 | 2018-04-20 | 蔡育仁 | Cooperative multimedia communication method and its system |
| CN111385748A (en) * | 2018-12-29 | 2020-07-07 | 华为技术有限公司 | Data transmission method and device, user equipment and computer storage medium |
| CN113867456A (en) * | 2021-09-27 | 2021-12-31 | 上海易航海芯农业科技有限公司 | Greenhouse intelligent monitoring method and system based on Internet of things technology |
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2007
- 2007-12-21 CN CNA2007100327846A patent/CN101465829A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104833A (en) * | 2009-12-18 | 2011-06-22 | 上海贝尔股份有限公司 | MBMS service transmission method and system based on layered modulation scheme |
| CN103716278B (en) * | 2012-09-28 | 2016-12-28 | 上海贝尔股份有限公司 | Delamination Transmission in relay communications system |
| US10182317B2 (en) | 2014-05-14 | 2019-01-15 | Huawei Technologies Co., Ltd. | Signal transmission method and apparatus |
| WO2015172427A1 (en) * | 2014-05-14 | 2015-11-19 | 华为技术有限公司 | Signal transmission method and device |
| US10200827B2 (en) | 2014-05-14 | 2019-02-05 | Huawei Technologies Co., Ltd. | Signal transmission method and apparatus |
| US10659927B2 (en) | 2014-05-14 | 2020-05-19 | Huawei Technologies Co., Ltd. | Signal transmission method and apparatus |
| CN104079357A (en) * | 2014-06-26 | 2014-10-01 | 上海交通大学 | Optical network system spectrum efficiency optimization method and device based on layering modulation |
| CN107409115A (en) * | 2015-03-19 | 2017-11-28 | 高通股份有限公司 | Method and apparatus for alleviating the resource contention between ultralow stand-by period (ULL) and old-fashioned transmission |
| CN107409115B (en) * | 2015-03-19 | 2020-10-16 | 高通股份有限公司 | Method and apparatus for mitigating resource conflicts between Ultra Low Latency (ULL) and legacy transmissions |
| CN107948115A (en) * | 2016-10-12 | 2018-04-20 | 蔡育仁 | Cooperative multimedia communication method and its system |
| CN111385748A (en) * | 2018-12-29 | 2020-07-07 | 华为技术有限公司 | Data transmission method and device, user equipment and computer storage medium |
| CN111385748B (en) * | 2018-12-29 | 2021-11-19 | 华为技术有限公司 | Data transmission method and device, user equipment and computer storage medium |
| CN113867456A (en) * | 2021-09-27 | 2021-12-31 | 上海易航海芯农业科技有限公司 | Greenhouse intelligent monitoring method and system based on Internet of things technology |
| CN113867456B (en) * | 2021-09-27 | 2023-05-09 | 上海易航海芯农业科技有限公司 | Greenhouse intelligent monitoring method and system based on Internet of things technology |
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