CN101371543B - A method for transmitting and receiving data using a plurality of carriers - Google Patents
A method for transmitting and receiving data using a plurality of carriers Download PDFInfo
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- CN101371543B CN101371543B CN200680035640XA CN200680035640A CN101371543B CN 101371543 B CN101371543 B CN 101371543B CN 200680035640X A CN200680035640X A CN 200680035640XA CN 200680035640 A CN200680035640 A CN 200680035640A CN 101371543 B CN101371543 B CN 101371543B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/022—Site diversity; Macro-diversity
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Abstract
Methods for transmitting and receiving data using a plurality of carriers are disclosed. One of the methods comprises multiplexing the multicast/broadcast data and the unicast data in a frame and attaching a pilot signal to the frame. Another of the methods comprises receiving the radio frame including a plurality of data symbols multiplexed multicast/broadcast data with unicast data and retrieving the multicast/broadcast data and the unicast data from the radio frame.
Description
Technical field
Present invention relates in general to use any communication system of multi-carrier transmission scheme, more specifically, relate to the method that multicast/broadcast data and unicast data are carried out multiplexed method and merge this multiplexed data.
Background technology
Up to the present, identical multicast/broadcast data is sent to a plurality of terminals in a plurality of sub-districts in down link (or forward link), and unicast data is sent to the terminal of appointment in each sub-district.
Through designed reception machine effectively, transferring from the identical data of a plurality of sub-districts through merging to conciliate in this terminal, can obtain many cell diversity gain of higher received power and Geng Gao.When receiving multicast/broadcast data and unicast data simultaneously, various data should be able to be distinguished in this terminal.
Therefore, hope exploitation can be effectively to multicast/broadcast data with unicast data carries out multiplexed so that the minimized method of the waste of frequency-time resource, and shine upon pilot/data so that the maximized method of many cell diversity gain.
Summary of the invention
Therefore, the present invention is directed to the method for using a plurality of carrier waves to transmit and receive data, this method can be eliminated one or more problem that limitation and shortcoming owing to prior art produce basically.
An object of the present invention is to provide a kind of effectively to multicast/broadcast data with unicast data carries out multiplexed so that the minimized method of the waste of frequency-time resource.
Another object of the present invention provides a kind of mapping pilot/data so that the maximized method of many cell diversity gain.
A purpose more of the present invention provides the method for a kind of scheduling (scheduling) multicast/broadcast data.
Other advantage of the present invention, purpose and characteristic will partly be set forth in following specification; And for those skilled in the art; Will be through following specification being studied and partly being become clear, perhaps can be through practice of the present invention is learnt.These purposes of the present invention can realize through the structure of in printed instructions, claims and accompanying drawing, specifically noting and obtain with other advantage.
In order to realize these purposes with other advantages and according to the object of the invention, as the concrete realization of institute here and broadly described, a kind of method of sending data may further comprise the steps: in frame, carry out multiplexed to multicast/broadcast data and unicast data; And to said frame additional pilot signal.
In another aspect of this invention, a kind of operation may further comprise the steps through the method for the radio frames that a plurality of carrier waves send: receive the radio frames that comprises a plurality of data symbols, this radio frames is multiplexed multicast/broadcast data and unicast data; And from said radio frames, obtain said multicast/broadcast data and unicast data.
Should be appreciated that, all be exemplary and illustrative to above general introduction of the present invention and following detailed description, and be intended to further explanation is provided the present invention for required protection.
Description of drawings
Comprise accompanying drawing to provide, incorporate accompanying drawing into and constitute the application's a part that accompanying drawing shows execution mode of the present invention and is used to explain principle of the present invention with specification to further understanding of the present invention.In the accompanying drawings:
Fig. 1 shows wherein multicast/broadcast data and unicast data by the wireless frame structure of transmission respectively;
Fig. 2 A shows wherein the wireless frame structure that multicast/broadcast data and unicast data is carried out frequency division multiplexing (FDM);
Fig. 2 B shows wherein the wireless frame structure that multicast/broadcast data and unicast data is carried out Time Division Multiplexing;
Fig. 2 C shows wherein multicast/broadcast data and unicast data is carried out frequency division-time division multiplexing (frequency-time division, wireless frame structure FTDM);
Fig. 3 A shows wireless frame structure shown in Fig. 2 A and that have discrete when jumping (frequency hopping-(frequency-timehopped)) pilot signal;
Fig. 3 B shows wireless frame structure shown in Fig. 2 B and that have discrete when jumping (frequency hopping-) pilot signal;
Fig. 3 C shows wireless frame structure shown in Fig. 2 C and that have discrete when jumping (frequency hopping-) pilot signal;
Fig. 4 A shows according to the wireless frame structure FDM method and that have two pilot signals;
Fig. 4 B shows according to the wireless frame structure TDM method and that have two pilot signals;
Fig. 4 C shows according to the wireless frame structure FDM method and that have two discrete guide-frequency signals;
Fig. 4 D shows according to the wireless frame structure TDM method and that have two discrete guide-frequency signals;
Fig. 5 A shows an example according to radio frames of the present invention;
Fig. 5 B shows another example according to radio frames of the present invention;
Fig. 6 shows such OFDM symbol, and wherein each OFDM symbol from each sub-district all carries different multicast/broadcast data;
Fig. 7 shows such OFDM symbol, and wherein each OFDM symbol from each sub-district all carries the identical multicast/broadcast data that on whole frequency band, distributes; And
Fig. 8 shows such OFDM symbol, and wherein each OFDM symbol from each sub-district carries identical multicast/broadcast data on CF.
Embodiment
Describe preferred implementation of the present invention, the example of these preferred implementations shown in the drawings now in detail.In the accompanying drawings, with using identical Reference numeral to refer to identical or similar part as much as possible.
Here, term " exemplary " is used for representing " instance or signal as an example, ".It is preferred or favourable that any execution mode that there is no need conduct " exemplary " here and describe is interpreted as with respect to other execution modes.
The fixed station that the base station normally communicates with the terminal, and also can be called as Node B, access point, base transceiver subsystem (BTS) or some other term.Each base station provides the communication to particular geographic area to cover.According to the context that has wherein used this term, base station and/or its overlay area can be represented in term " sub-district ".The terminal can be dispersed in the whole system.
The terminal can be that fix or mobile, and also can be called as travelling carriage, wireless device, subscriber equipment (UE), user terminal, subscriber unit or some other term.Term " terminal " and " user " here can mutual alternative use.In any particular moment, the terminal can communicate on down link and/or up link with zero, one or more base station.The communication link of down link (or forward link) expression from the base station to the terminal, and up link (or reverse link) expression is from the communication link of terminal to base station.
Here described transmission technology can be used in the multiple wireless technology, such as OFDM (OFDM), the FDMA that interweaves (IFDMA) (also being called as distributed (Distributed) FDMA) and centralized (Localized) FDMA (LFDMA) (also being called as arrowband FDMA or classics (Classical) FDMA).
OFDM, IFDMA and LFDMA are the multi-carrier-wave wireless technology that can effectively the whole system bandwidth be divided into a plurality of (S) orthogonal frequency subbands.These sub-bands also are called as tone signal (tone), subcarrier, sub carrier group (bin) and channel.Each sub-frequency bands is associated with each number of sub-carrier that can use data to modulate.OFDM sends modulation symbol on the whole or subclass of this S sub-frequency bands in frequency domain.IFDMA sends modulation symbol on the sub-band in being evenly distributed on this S sub-frequency bands in time domain.LFDMA is in time domain and on adjacent sub-bands, send modulation symbol usually.Can regard OFDM as different wireless technologies for the application of clean culture, multicast and broadcast transmitted.More than listed wireless technology be not limit, and can these transmission technologys be used for above other wireless technologys of not mentioning.
1. multiplexed multicast/broadcast data and unicast data
Existence is carried out two kinds of multiplexed methods with multicast/broadcast data and unicast data.
First method is to send multicast/broadcast data and unicast data respectively through each radio frames, and is as shown in Figure 1.In other words, specific radio frames is only sent in the two one of multicast/broadcast data and unicast data.The terminal receives this particular radio frames, and merges the data from this particular radio frames through RF (radio frequency) merging method.Explain providing below for the more of RF merging method more.One of major advantage of first method is, because each radio frames is only carried a kind of data, so it is a kind of relative simple algorithm that implements.
Second method is to use the different multiplex method, and (such as FDM (frequency division multiplexing), TDM (time division multiplexing) or (FTDM (frequency division-time division multiplexing)) are sent multicast/broadcast data through same radio frames, and be as shown in Figure 2.
Fig. 2 A shows wherein multicast/broadcast data and unicast data is carried out the multiplexing radio frames of FDM.In addition, expectation is to send the radio frames with pilot signal.Pilot signal makes the terminal to carry out channel estimating through between mobile communications network and this terminal, sending prearranged signals.Through receiving this pilot signal, this terminal pins is carried out channel estimating to the multicast/broadcast data from a plurality of sub-districts, and merges the data that received are carried out demodulation through carrying out RF.Though Fig. 2 A shows first OFDM symbol that pilot signal is arranged in this radio frames, this pilot signal can be arranged in any position of this radio frames.According to the present invention, the position of pilot signal all is unrestricted in frequency domain or in time domain.Any OFDM symbol perhaps or even the number of sub-carrier in this OFDM symbol, can carry pilot signal.Fig. 3 A shows the wireless frame structure of above-mentioned FDM example.Shown in Fig. 3 A, can pilot signal be arranged in each T/F zone.In the FDM method, in different frequency bands, send multicast/broadcast data and unicast data.
Fig. 2 B shows wherein multicast/broadcast data and unicast data is carried out the multiplexing radio frames of TDM.In addition, expectation is to send the radio frames with pilot signal.Pilot signal makes the terminal to carry out channel estimating through between mobile communications network and this terminal, sending prearranged signals.Through receiving this pilot signal, this terminal pins is carried out channel estimating to the multicast/broadcast data from a plurality of sub-districts, and merges the data that received are carried out demodulation through carrying out RF.Though Fig. 2 B shows first OFDM symbol that pilot signal is arranged in this radio frames, this pilot signal can be arranged in any position of this radio frames.According to the present invention, the position of pilot signal all is unrestricted in frequency domain or in time domain.Any OFDM symbol perhaps or even the number of sub-carrier in this OFDM symbol, can carry pilot signal.Fig. 3 B shows a kind of wireless frame structure of above-mentioned TDM example.Shown in Fig. 3 B, can pilot signal be arranged in each T/F zone.In the TDM method, can send multicast/broadcast data and unicast data in the different moment.
Fig. 2 C shows wherein the radio frames of multicast/broadcast data and unicast data being carried out frequency division-time division multiplexing (FTDM).Owing to send multicast/broadcast data and unicast data through specific frequency-time zone, the multichannel multiplexing method of Fig. 2 C is a kind of " jumping (hopping) " method.Can obtain frequency-time diversity through suitably controlling dancing mode.With the same in Fig. 2 A and 2B, expectation be to send the radio frames of jumping type with pilot signal.Pilot signal makes the terminal to carry out channel estimating through between mobile communications network and this terminal, sending prearranged signals.Through receiving this pilot signal, this terminal pins is carried out channel estimating to the multicast/broadcast data from a plurality of sub-districts, and merges the data that received are carried out demodulation through carrying out RF.Though Fig. 2 C shows first OFDM symbol that pilot signal is arranged in this radio frames, this pilot signal can be arranged in any position of this radio frames.According to the present invention, the position of pilot signal all is unrestricted in frequency domain or in time domain.Any OFDM symbol perhaps or even the number of sub-carrier in this OFDM symbol, can carry pilot signal.Fig. 3 C shows the wireless frame structure of above-mentioned " jump " example.When frequency hopping-jumping, in the method, can send multicast/broadcast data and unicast data in the different frequencies and the different moment.
Above-mentioned TDM, FDM and FTDM method are compared with the method among Fig. 1 has greater flexibility.Especially, FDM has extra advantage.Fig. 4 B shows the wireless frame structure according to the TDM method.If except the pilot signal that is used for unicast data, also additional pilots is used for the RF merging of multicast/broadcast data, then owing to sending multicast/broadcast data, so the TDM method need be added this pilot signal in the whole frequency band to through whole frequency band.Will this pilot signal not be included in specific OFDM symbol (first among Fig. 4 B and second OFDM symbol) or each subcarrier.But, expectation be, pilot signal is distributed on all subcarriers, estimate and data-modulated to obtain precise channels.Therefore, the TDM method need be distributed in pilot signal in the wide frequency range.
Yet for pilot signal, FDM method and data by MoM and MEI have extra advantage.Fig. 4 A shows according to the wireless frame structure FDM method and that have two pilot signals.If except the pilot signal that is used for unicast data, also additional pilot signal is used for multicast/broadcast data, then the FDM method only need be added this additional pilot signal in the frequency band that sends multicast/broadcast data.Therefore, in the FDM method, need less relatively pilot signal expense, come effectively multicast/broadcast data to be carried out demodulation.
Because radio frames is less relatively chronomere, so less in the process mid band distortion of sending radio frames.Though can pilot signal be added in the specific OFDM symbol, shown in Fig. 4 A and 4B, the example shown in the present invention is not limited to.In other words, radio frames can comprise pilot signal in each frequency-time zone.Fig. 4 C and 4D show the pilot signal in all places.Specifically, can in the frequency-time zone that sends multicast/broadcast data, provide additional pilot signal to merge multicast/broadcast data.Additional pilot signal also is not limited to be arranged in the specific region.Therefore, shown in Fig. 4 C and 4D, various pilot positions all are possible.In addition, the multicast/broadcast pilot signal can be positioned at some general pilot signal areas.
2. the scheduling of multicast/broadcast data
The invention discloses the dispatching method of the radio frames of sending multicast/broadcast data.Here, the radio frames that multicast/broadcast data is sent in the term radio frames of multicast/broadcast data " send " expression, this multicast/broadcast data with/do not carry out multiplexed with unicast data.
First method is that the radio frames of sending multicast/broadcast data has preassigned pattern.This pattern can be the periodicity pattern in the time domain, perhaps can follow ad hoc rules.Network makes the terminal know this pattern in advance, so that the terminal only receives multicast/broadcast data in belonging to the radio frames of this preassigned pattern.The advantage of this method is whether the terminal need not checked multicast/broadcast data, has therefore prolonged battery life in radio frames.
In this method; Semi-static (semi-statically) to the amount or multiplexed setting of the multicast/broadcast data that in the current wireless frame, sends; And network periodically or is when being necessary notified this information to the terminal through high-level signaling.
Second method is that this network needn't send multicast/broadcast data in the radio frames of distributing with preassigned pattern.The amount or the multiplexed information of the multicast/broadcast data that the control information that in the current wireless frame, comprised has the information relevant with in fact whether having sent multicast/broadcast data, send in the current wireless frame.This control information is read at the terminal, and receives specific multicast/broadcast data.In addition; If in sending the radio frames of multicast/broadcast data, use additional pilot signal so that multicast/broadcast data is carried out demodulation, then the control information of this radio frames comprises and the relevant information of type of whether having used additional pilot signal and/or additional pilot signal.Can use the control information that has same or analogous form and signaling structure with the control information that is used for unicast data.In any case, in this case, should be by the multicast ID replacement information relevant with the Termination ID of the control information that is used for unicast data.
The third method is that network is sending multicast/broadcast data in the radio frames arbitrarily in needs.In this method, because the terminal possibly all not know to have multicast/broadcast data in which radio frames by any way, so the control information of this each radio frames of terminal reception, and check whether comprise multicast/broadcast data in this radio frames.
The amount or the multiplexed information of the multicast/broadcast data that the control information that in the current wireless frame, comprised also has the information relevant with in fact whether having sent multicast/broadcast data, send at the current wireless frame.This control information is read at the terminal, and receives specific multicast/broadcast data.In addition; If in sending the radio frames of multicast/broadcast data, use additional pilot signal so that multicast/broadcast data is carried out demodulation, then the control information of this radio frames comprises and the relevant information of type of whether having used additional pilot signal and/or additional pilot signal.Can use the control information that has same or analogous form and signaling structure with the control information that is used for unicast data.In any case, in this case, should be by the multicast ID replacement information relevant with the Termination ID of the control information that is used for unicast data.
When using the Cyclic Prefix of plural different length in the demodulation at portable terminal place
Compare with the circulating prefix-length of OFDM symbol in the radio frames of sending unicast data, the OFDM symbol that sends in the radio frames of multicast/broadcast data can have different circulating prefix-lengths.
First method is that first OFDM symbol in each frame has identical circulating prefix-length, and all the other the OFDM symbols in this frame have length variable.First OFDM symbol has the information of the circulating prefix-length of all the other OFDM symbols of expression.
Second method is, the terminal is assumed to be the shortest circulating prefix-length in the middle of the possible circulating prefix-length with the circulating prefix-length of first OFDM symbol.Even actual circulating prefix-length is longer than the shortest possible circulating prefix-length, demodulation also can successfully be carried out to this signal in this terminal.But, to compare during with the circulating prefix-length of having estimated first OFDM symbol, error rate maybe be higher.If correctly do not receive first OFDM symbol; Then this terminal is assumed to be time the shortest circulating prefix-length in the middle of the possible circulating prefix-length with the circulating prefix-length of first OFDM symbol, and continues this processing till correctly having received first OFDM symbol.
4. many cell diversity
When the mobile radio network that uses OFDM (OFDMA) sent multicast/broadcast data in down link, a plurality of neighbor cells can send identical data.Through designing the receiver that can merge effectively the data from a plurality of sub-districts with demodulation, the terminal can obtain higher power and higher many cell diversity gain.There are two kinds of merging methods that the data from a plurality of sub-districts are merged, i.e. RF merging method and selection merging method.
In RF merging method (often also being called as ' Single Frequency Network (SFN) ' merging method); Identical modulation symbol is sent in each sub-district in identical frequency-time zone, and each pilot signal that in this frequency-time zone, is used for demodulation should be identical for each sub-district also.In other words, at receiving terminal, should in identical frequency-time zone, in the error range that allows, each data from a plurality of sub-districts be received.Therefore, should realize sending synchronously to each sub-district.
Therefore, need not separate the signal from each sub-district at the terminal.On the contrary, this terminal will be regarded the signal from a sub-district via various channel path as from the signal of each sub-district.Through doing like this, the terminal has the effect that has increased more diversity paths, and has obtained higher diversity gain.
But, be used for should having the different pilot signals structure, to avoid the interference in this frequency-time zone to sending to the pilot signal of carrying out demodulation in the data at the terminal of this sub-district.
Therefore, the present invention also comprises the additional pilot signal that is used for multicast/broadcast data (below be called the multicast/broadcast pilot tone) except the general pilot signal that is used for unicast data.Compare with the general pilot of this sub-district or neighbor cell, the multicast/broadcast pilot tone should be positioned at different frequency-time zones.
Usually, the frequency pilot sign that is used for modulation symbol is carried out demodulation is near frequency-time zone should be positioned at modulation symbol.If in identical radio frames, send multicast/broadcast data and unicast data; And the modulation symbol of multicast/broadcast data is distributed in the radio frames widely, then possibly need too much frequency pilot sign to make in the frequency pilot sign each all be positioned near each modulation symbol.
Fig. 5 A shows an example according to radio frames of the present invention.A radio frames has a plurality of OFDM symbols.For example, have 6 OFDM symbols in the radio frames among Fig. 5 A.An OFDM symbol consists of a plurality of sub-carriers.For example, shown in Fig. 5 A, send multicast/broadcast data (140) through the subcarrier in the special frequency band.First included OFDM symbol comprises general pilot (110) and control data (130) in this radio frames.The position of general pilot (110) is different for each sub-district.Mobile communications network transmission has first OFDM symbol of multicast/broadcast map information (160), to show the position of multicast/broadcast data directly or through ad hoc rules.Owing to only in specific frequency band, send multicast/broadcast data (140), therefore also only send multicast/broadcast pilot tone (120) according to multicast/broadcast data (140) through the subcarrier in the special frequency band.Multicast/broadcast pilot tone (120) is positioned at identical position for each sub-district, and the general pilot (110) of being sent by each sub-district can be positioned at different positions usually.
Fig. 5 B shows another example according to radio frames of the present invention.Similar with Fig. 5 A, have 6 OFDM symbols in the radio frames among Fig. 5 B.But the main distinction between Fig. 5 A and Fig. 5 B is, in Fig. 5 B, in sub-district 1 and sub-district 2, all on second OFDM symbol, sends multicast/broadcast data, and in Fig. 5 A, all on specific frequency, sends multicast/broadcast data in entire frame in the time.Therefore, the terminal obtains multicast/broadcast data map information (160) through first OFDM symbol, and uses RF merging method to come the multicast/broadcast data (140) that sends with multicast/broadcast pilot tone (120) is merged.Needn't on second OFDM symbol, send multicast/broadcast data, but can the 3rd or the back the OFDM symbol on send multicast/broadcast data.
Fig. 6 shows such OFDM symbol, and wherein each OFDM symbol from each sub-district all carries different multicast/broadcast data.Sub-district a and sub-district b send first multicast/broadcast data simultaneously, and sub-district c sends second multicast/broadcast data different with first multicast/broadcast data simultaneously.Can use 210,220 and 230 represent sub-district a, b and c respectively each OFDM symbol.Send different multicast/broadcast pilot to each multicast/broadcast data, reduce thus and disturb.The multicast/broadcast information of sending with first OFDM symbol in this case, comprises the information of the type of indicating the multicast/broadcast pilot tone that is used for this sub-district.
In selecting the merging method, the demodulation sign indicating number is carried out to the same signal from each sub-district in the terminal, and is confirmed to receive successfully by each sub-district.Therefore, even only receive successfully from of a plurality of sub-districts, the terminal also is successful for the overall reception of this signal, has increased diversity gain thus.Therefore, need be in RF merging method in selecting the merging method employed multicast/broadcast pilot tone.Only need general pilot to come multicast/broadcast data and unicast data are carried out demodulation.Therefore, when communication network is supported RF merging method, send the multicast/broadcast pilot tone, and when communication network is not supported RF merging method, do not send the multicast/broadcast pilot tone.
In addition, sub-district all terminal notices in this sub-district: this communication network supports RF merging method still to support to select the merging method, that is, whether this sub-district sends the multicast/broadcast pilot tone that is used for multicast/broadcast data.When supporting RF merging method, each terminal uses the multicast/broadcast pilot tone to come the demodulation multicast/broadcast data, and perhaps when not supporting RF merging method, each terminal uses general pilot to come the demodulation multicast/broadcast data.
Fig. 7 shows such OFDM symbol, and wherein each OFDM symbols carry from each sub-district has the identical multicast/broadcast data that on whole frequency band, distributes.Through on whole frequency band, distributing, can increase frequency diversity.When sub-district a and sub-district b were arranged in identical service area (service A), sub-district a sent identical multicast/broadcast data with sub-district b.In addition, when sub-district c was arranged in the service area different with sub-district b with sub-district a (service B), sub-district c sent and sub-district a and sub-district b different multicast/broadcast data.Sub-district a, sub-district b and sub-district c send OFDM symbol 310,320 and 330 respectively.Sub-district a needn't send identical pilot tone with sub-district b.Sub-district a sends identical multicast/broadcast data with sub-district b, but on different frequencies, sends to avoid interference.
Fig. 8 shows such OFDM symbol, and wherein each OFDM symbol from each sub-district carries identical multicast/broadcast data on CF.Through on CF, sending multicast/broadcast data, can reduce the quantity of pilot tone.Similar with Fig. 7, when sub-district a and sub-district b were arranged in identical service area (service A), sub-district a sent identical multicast/broadcast data with sub-district b.In addition, when sub-district c was arranged in the service area different with sub-district b with sub-district a (service B), sub-district c sent and sub-district a and sub-district b different multicast/broadcast data.Sub-district a, sub-district b and sub-district c send OFDM symbol 410,420 and 430 respectively.Sub-district a needn't send identical pilot tone with sub-district b.Sub-district a sends identical multicast/broadcast data with sub-district b, but on different frequencies, sends to avoid interference.
Industrial applicibility
It will be apparent to those skilled in the art that, can be under the situation that does not break away from the spirit or scope of the present invention make various modifications and variation in to the present invention.Therefore, the present invention is intended to contain these modifications of the present invention and the variation that falls in accompanying claims and the equivalents scope thereof.
Claims (13)
1. one kind receives the method by the radio frames of a plurality of sub-districts transmission by the terminal in the mobile communications network of supporting radio frequency merging method, and this method may further comprise the steps:
Each sub-district from a plurality of sub-districts receives the radio frames that comprises a plurality of data symbols; Each radio frames in wherein a plurality of radio frames comprises multicast/broadcast data and unicast data; And in same radio frames, carried out multiplexed to said multicast/broadcast data and said unicast data; And said same radio frames also comprises the additional pilot signal that is used for said multicast/broadcast data except comprising the general pilot signal that is used for unicast data; The included additional pilot signal of each radio frames in wherein a plurality of radio frames is positioned at identical position for each sub-district; And the included general pilot signal of each radio frames in a plurality of radio frames is positioned at different positions for each sub-district, and
Utilize said additional pilot signal to merge the said multicast/broadcast data that sends from a plurality of sub-districts through radio frequency merging method.
2. method according to claim 1, wherein, said receiving step is further comprising the steps of: receive said multicast/broadcast data and unicast data in the different moment.
3. method according to claim 1, wherein, said receiving step is further comprising the steps of: receive said multicast/broadcast data and unicast data with different frequencies.
4. method according to claim 1, wherein, said receiving step is further comprising the steps of: receive said multicast/broadcast data and unicast data in the different moment and with different frequencies.
5. method according to claim 1, wherein, said radio frames comprises that indication and unicast data have carried out the designator of multiplexed said multicast/broadcast data.
6. method according to claim 5, wherein, said designator comprises at least one in the two of amount of multiplexed type and said multicast/broadcast data.
7. method according to claim 5 wherein, is sent said designator at the fixed time.
8. method according to claim 1, this method is further comprising the steps of: the transformat that receives the characteristic of the said radio frames of expression.
9. method according to claim 8; Wherein, said transformat comprise the quantity that is included in the data symbol in the said radio frames, the length of the Cyclic Prefix that sends with said data symbol and be included at least one among this three of pilot signal in the said radio frames.
10. method according to claim 8 wherein, is sent the transformat of current wireless frame in last radio frames.
11. method according to claim 1, wherein, the Cyclic Prefix that sends with said a plurality of data symbols has length variable.
12. method according to claim 1, wherein, the Cyclic Prefix that sends with first data symbol has fixing length.
13. method according to claim 12; This method is further comprising the steps of: receive the length information of said Cyclic Prefix through said first data symbol, said Cyclic Prefix sends with the data symbol except said first data symbol.
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72253905P | 2005-09-30 | 2005-09-30 | |
| US60/722,539 | 2005-09-30 | ||
| KR10-2005-0103503 | 2005-10-31 | ||
| KR20050103503 | 2005-10-31 | ||
| KR1020050103503 | 2005-10-31 | ||
| KR10-2005-0114753 | 2005-11-29 | ||
| KR1020050114753A KR101191183B1 (en) | 2005-09-30 | 2005-11-29 | method for transmitting and receiving data using a plurality of carriers |
| KR1020050114753 | 2005-11-29 | ||
| KR1020060021340A KR101241879B1 (en) | 2005-10-31 | 2006-03-07 | method for transmitting and receiving data using a plurality of carrier |
| KR1020060021340 | 2006-03-07 | ||
| KR10-2006-0021340 | 2006-03-07 | ||
| PCT/KR2006/003936 WO2007037657A2 (en) | 2005-09-30 | 2006-09-29 | A method for transmitting and receiving data using a plurality of carriers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101371543A CN101371543A (en) | 2009-02-18 |
| CN101371543B true CN101371543B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200680035640XA Expired - Fee Related CN101371543B (en) | 2005-09-30 | 2006-09-29 | A method for transmitting and receiving data using a plurality of carriers |
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| KR (1) | KR101191183B1 (en) |
| CN (1) | CN101371543B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102640554B (en) * | 2009-09-07 | 2015-04-22 | Sk电信有限公司 | Signal interference minimizing system and method for broadcasting and telecommunication convergence section within short-range area, and device applied thereto |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101377906B1 (en) * | 2007-10-29 | 2014-03-25 | 엘지전자 주식회사 | Method for transmitting data for digital broadcasting in wireless communication system |
| CN101820584B (en) * | 2009-02-27 | 2013-09-11 | 中兴通讯股份有限公司 | Method and device for dividing and mapping resources |
| CN102223604B (en) * | 2010-04-16 | 2013-11-06 | 中兴通讯股份有限公司 | Subframe configuring method and system |
| WO2013035941A1 (en) * | 2011-09-05 | 2013-03-14 | 엘지에릭슨 주식회사 | Method for determining a pdsch start symbol of an ec between heterogeneous networks, and mobile communication system therefor |
| US9215040B2 (en) * | 2011-09-23 | 2015-12-15 | Futurewei Technologies, Inc. | Hybrid in-band/out-of-band relays |
| CN106209713A (en) * | 2015-05-06 | 2016-12-07 | 北京信威通信技术股份有限公司 | A kind of demodulation method in radio communication |
| CN108990066B (en) * | 2017-06-02 | 2022-01-28 | 普天信息技术有限公司 | Downlink interference coordination method and device for multicast and unicast mixed service |
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| EP1267537A2 (en) * | 1994-05-20 | 2002-12-18 | Hitachi, Ltd. | An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting |
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| CN1604646A (en) * | 2004-10-29 | 2005-04-06 | 清华大学 | Method for reducing power consumption of hand-held mobile multimedia telecasting equipment |
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| US20020028680A1 (en) | 2000-07-07 | 2002-03-07 | Open Pit Networks, Inc | System, method and computer program product for wireless data transmission over conventional television frequency bands |
| US7660275B2 (en) | 2003-10-24 | 2010-02-09 | Qualcomm Incorporated | Local and wide-area transmissions in a wireless broadcast network |
| ES2348415T3 (en) | 2004-01-20 | 2010-12-03 | Qualcomm, Incorporated | SYNCHRONIZED DIFFUSION / MULTIDIFUSION COMMUNICATION. |
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| EP1267537A2 (en) * | 1994-05-20 | 2002-12-18 | Hitachi, Ltd. | An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting |
| CN1160887C (en) * | 2000-04-13 | 2004-08-04 | 索尼公司 | Orthogonal frequency-division multiplex transmitting apparatus and method |
| CN1491011A (en) * | 2002-10-19 | 2004-04-21 | 三星电子株式会社 | Multicarrier transmitting system for inserting pilot signal in frequency domain and inserting method thereof |
| CN1592405A (en) * | 2003-08-27 | 2005-03-09 | 数据资讯服务有限公司 | Digital multicast system |
| CN1604646A (en) * | 2004-10-29 | 2005-04-06 | 清华大学 | Method for reducing power consumption of hand-held mobile multimedia telecasting equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102640554B (en) * | 2009-09-07 | 2015-04-22 | Sk电信有限公司 | Signal interference minimizing system and method for broadcasting and telecommunication convergence section within short-range area, and device applied thereto |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101191183B1 (en) | 2012-10-15 |
| CN101371543A (en) | 2009-02-18 |
| KR20070037278A (en) | 2007-04-04 |
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