The transmission method and device of dataTechnical field
The present invention relates to the communications field, in particular to the transmission method and device of a kind of data.
Background technology
In today of wireless communication technology high speed development, with the introducing of multi-antenna technology, bigger data flow can be supportedAmount and farther MPS process distance.
Follow-up further applying with extensive antenna technology (Massive MIMO), it is possible to use multiple antennas is formedNarrower wave beam lifts the signal noise ratio level of subscriber signal to support more efficient coding to adjust to reduce the interference between userMode processed and farther MPS process distance, it might even be possible to pass through the quasi- orthogonality between wave beam in same time-frequency domain resourcesForm the multiuser MIMO based on space division multiple access (Space Division Multiple Access, referred to as SDMA)(MU-MIMO) further to lift cell capacity and spectrum efficiency.
For any one general wireless communication system, it will not only transmit the Traffic Channel of user class, also descendingLink needs to send the common broadcast channel and common signaling of cell level, because its different sensing features, broadcast dataNeed to be sent to all users in cell, and user-level data only needs to be transmitted to some specific user, for theseHow data are efficiently transmitted, it is necessary to use different launch parties from the data of user class under multiple antennas frameworkFormula.
Generally in the radio communication of multiple antennas is introduced into, using intelligent antenna technology, it is respectively adopted based on cell-level broadcast waveBeam and user class dedicated beams correspondence transmission cell DBMS and user-level data, because the coverage of broadcast beam is brightIt is aobvious to be more than user class wave beam, therefore the figuration gain of user class wave beam will be significantly greater than broadcast beam, Fig. 1 a~1b is relatedIn technology in TD LTE 8 antenna broadcast wave beams with point to terminal user class dedicated beams directional diagram, such as Fig. 1 a~1bIt is shown, the contrast of 8 antenna broadcast wave beams and shaped-beam, so that terminal is received under same transmission powerThe signal quality of broadcast data will be significantly worse than user-level data, can only be by reducing the modulation system and coding of broadcast dataThe modes such as efficiency are to alleviate this species diversity, so as to cause the waste to frequency spectrum resource.
And cell-level (includes it and demodulates the reference signal needed) with user-level data in existing communication system protocolGenerally all in being launched in same time-domain resource, it is necessary to carry out figuration to it using the shaping method of base band, withThe development of antenna technology, especially for the demand of the super large radius of societies such as reply aviation covering, starts to introduce in radio frequencySide can form the narrow beam antenna of wave beam forming to strengthen received signal quality according to end message itself, and such antenna canTo realize narrower wave beam and higher gain, but it can only make a distinction in time domain to different signal figuration demands.
For the above mentioned problem in correlation technique, not yet there is effective solution at present.
The content of the invention
The invention provides a kind of transmission method of data and device, with least solve to solve in correlation technique cell-level withThe problem of user-level data can only make a distinction in time domain to different signal figuration demands.
According to an aspect of the invention, there is provided a kind of transmission method of data, including：Descending time domain unit is dividedFor downlink broadcast data time domain unit and downlink service data time domain unit；Passed by the downlink broadcast data time domain unitDefeated cell-level broadcast data and the reference signal corresponding to the cell-level broadcast data, and pass through the downlink business numberUser-level data and the reference signal corresponding to the user-level data are transmitted according to time domain unit.
Alternatively, the descending time domain unit is divided in the following manner：Cell-level broadcast wave bean shaping, userThe directional wave beam figuration of level.
Alternatively, determine to need the number of the downlink broadcast data time domain unit of occupancy by least one of：It is descending wideBroadcast the size of data of transmission, the budget of downlink broadcast transmission link, the planning of downlink broadcast transmission network.
Alternatively, in FDD system, the position of the downlink broadcast data time domain unit is downstream bandsAny time domain unit moment；In TDD system, the position position of the downlink broadcast data time domain unitOutside the GP time domain units of non-up time domain unit and ascending-descending subframes conversion.
Alternatively, the cell-level broadcast data includes：Broadcast signaling, broadcast data；Corresponding to cell-level broadcastThe reference signal of data includes：The corresponding reference signal of the broadcast signaling, reference signal corresponding with the broadcast data；Wherein, the corresponding antenna for base station of the downlink broadcast data time domain unit uses broadcast wave bean shaping；The user-level dataIncluding：User class signaling, user-level data；Include corresponding to the user-level data：It is corresponding with the user class signalingReference signal, reference signal corresponding with the user-level data；Wherein, the downlink service data time domain unit pairThe antenna for base station answered uses the directional wave beam figuration based on user class.
Alternatively, methods described also includes：Cell-level broadcast data is being transmitted by the downlink broadcast data time domain unitAnd corresponding to the cell-level broadcast data reference signal when, the lifting transmitting cell-level broadcast data, Yi JiyuThe power of the corresponding reference signal of the cell-level broadcast data time domain unit；Wherein, by reducing the downlink business numberAccording to the scheduling of time domain unit to keep total transmission power constant.
Alternatively, the time domain unit is at least one of：Subframe, time domain, symbol.
According to another aspect of the present invention there is provided a kind of transmitting device of data, including：Division module, for inciting somebody to actionDescending time domain unit is divided into downlink broadcast data time domain unit and downlink service data time domain unit；Transport module, is used forCell-level broadcast data is transmitted and corresponding to the cell-level broadcast data by the downlink broadcast data time domain unitReference signal, and user-level data and corresponding to the user class is transmitted by the downlink service data time domain unitThe reference signal of data.
Alternatively, the division module is divided according in the following manner to the descending time domain unit：Cell-level broadcast waveThe directional wave beam figuration of beam figuration, user class.
Alternatively, determine to need the number of the downlink broadcast data time domain unit of occupancy by least one of：It is descending wideBroadcast the size of data of transmission, the budget of downlink broadcast transmission link, the planning of downlink broadcast transmission network.
Alternatively, in FDD system, the position of the downlink broadcast data time domain unit is located at downlink frequencyAny time domain unit moment of band；In TDD system, the position of the downlink broadcast data time domain unitOutside the GP time domain units of non-up time domain unit and ascending-descending subframes conversion.
Alternatively, the cell-level broadcast data includes：Broadcast signaling, broadcast data；Corresponding to cell-level broadcastThe reference signal of data includes：The corresponding reference signal of the broadcast signaling, reference signal corresponding with the broadcast data；Wherein, the corresponding antenna for base station of the downlink broadcast data time domain unit uses broadcast wave bean shaping；The user-level dataIncluding：User class signaling, user-level data；Include corresponding to the user-level data：It is corresponding with the user class signalingReference signal, reference signal corresponding with the user-level data；Wherein, the downlink service data time domain unit pairThe antenna for base station answered uses the directional wave beam figuration based on user class.
Alternatively, described device also includes：Hoisting module, cell is being transmitted by the downlink broadcast data time domain unitWhen level broadcast data and the reference signal corresponding to the cell-level broadcast data, the lifting transmitting cell-level broadcast numberAccording to, and reference signal corresponding with the cell-level broadcast data time domain unit power；Wherein, it is described by reducingThe scheduling of downlink service data time domain unit is to keep total transmission power constant.
Alternatively, the time domain unit is at least one of：Subframe, time domain, symbol.
By the present invention, during using descending time domain unit being divided into downlink broadcast data time domain unit and downlink service dataDomain unit, and then cell-level broadcast data is transmitted by downlink broadcast data time domain unit and number is broadcasted corresponding to cell-levelAccording to reference signal, and user-level data and corresponding to user-level data transmitted by downlink service data time domain unitThe mode of reference signal, can support the side of the different figuration of the data application of cell-level and user class and resource allocation policyFormula, area can only be carried out in time domain from user-level data to different signal figuration demands by solving cell-level in correlation techniqueThe problem of dividing, covering and the performance of lifting cell are reached.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present inventionSchematic description and description be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 a~1b is user class dedicated beams of the 8 antenna broadcast wave beams with pointing to terminal in TD LTE in correlation techniqueDirectional diagram；
Fig. 2 is the flow chart of the transmission method of data according to embodiments of the present invention；
Fig. 3 is the structured flowchart of the transmitting device of data according to embodiments of the present invention；
Fig. 4 is according to the uplink/downlink frames structural representation provided in alternative embodiment one of the present invention；
Fig. 5 is the schematic diagram of the frame structure of the downlink business subframe in alternative embodiment one of the present invention；
Fig. 6 is the schematic diagram of the frame structure of the downlink broadcast subframe in alternative embodiment one of the present invention；
Fig. 7 is according to the uplink/downlink frames structural representation provided in alternative embodiment two of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings not conflictedUnder condition, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first ", " second " in description and claims of this specification and above-mentioned accompanying drawingEtc. being for distinguishing similar object, without for describing specific order or precedence.
A kind of transmission method of data is provided in the present embodiment, and Fig. 2 is the transmission of data according to embodiments of the present inventionThe flow chart of method, as shown in Fig. 2 the flow comprises the following steps：
Step S202：Descending time domain unit is divided into downlink broadcast data time domain unit and downlink service data time domain listMember；
Step S204：Cell-level broadcast data is transmitted and wide corresponding to cell-level by downlink broadcast data time domain unitThe reference signal of multicast data, and user-level data is transmitted and corresponding to user's series by downlink service data time domain unitAccording to reference signal.
By the above-mentioned steps S202 and step S204 of the present embodiment, downlink broadcast data are divided into using by descending sub frameTime domain unit and downlink service data time domain unit, and then cell-level broadcast number is transmitted by downlink broadcast data time domain unitAccording to this and corresponding to the reference signal of cell-level broadcast data, and pass through downlink service data time domain unit transmission user's seriesThe mode of reference signal according to this and corresponding to user-level data, can support that the data application of cell-level and user class is differentFiguration and resource allocation policy, solving cell-level in correlation technique can only be in time domain to different from user-level dataThe problem of signal figuration demand makes a distinction, has reached covering and the performance of lifting cell.
It should be noted that being drawn in the following manner to descending time domain unit in the optional embodiment of the present embodimentPoint：The directional wave beam figuration of cell-level broadcast wave bean shaping, user class；In addition, the time domain being related in the present embodimentUnit can be：Subframe, time slot or symbol.
And for the number for the downlink broadcast data time domain unit being related in the present embodiment, another in the present embodiment canSelect in embodiment, determined by way of one below：The size of data of downlink broadcast transmission, downlink broadcast chainRoad budget, the planning of downlink broadcast transmission network.
In addition, for the position for the downlink broadcast data time domain unit being related in the present embodiment, in different system middle positionsPut inconsistent, for example, in FDD (Frequency Division Duplexing, referred to as FDD) system,The position of downlink broadcast data time domain unit is any time domain unit moment of downstream bands；And in time division duplex (TimeDivision Duplexing, referred to as TDD) in system, when the position of downlink broadcast data time domain unit is located at non-upOutside domain unit and the GP subframes of up-downgoing time domain unit conversion.Wherein, either in which system, the present embodimentThe position for the downlink broadcast data time domain unit being related to can be for continuously or discontinuously.
In another optional embodiment of the present embodiment, the cell-level broadcast data being related in the present embodiment includes：Broadcast signaling, broadcast data；Reference signal corresponding to cell-level broadcast data includes：Broadcast signaling is corresponding with reference to letterNumber, reference signal corresponding with broadcast data；Wherein, the corresponding antenna for base station of downlink broadcast data time domain unit is using wideBroadcast wave beam forming；
User-level data includes：User class signaling, user-level data；Include corresponding to user-level data：Believe with user classMake corresponding reference signal, reference signal corresponding with user-level data；Wherein, downlink service data time domain unit correspondenceAntenna for base station use the directional wave beam figuration based on user class.
In order to support farther MPS process and higher performance, the method for the present embodiment can also include：By descendingWhen broadcast data time domain unit transmits cell-level broadcast data and the reference signal corresponding to cell-level broadcast data, liftingLaunch cell-level broadcast data, and reference signal corresponding with cell-level broadcast data time domain unit power；Wherein,By reducing the scheduling of downlink service data time domain unit to keep total transmission power constant.
In addition, the frequency pilot sign in downlink broadcast or business datum time domain unit can difference, the code check used, modulationMode etc. can also be different；Based on the descending frame structure being related in the present embodiment, terminal for this new descending frame structure,Different channel estimation and equalization algorithm are used in different subframes (time slot).
Through the above description of the embodiments, those skilled in the art can be understood that according to above-described embodimentMethod the mode of required general hardware platform can be added to realize by software, naturally it is also possible to by hardware, but a lotIn the case of the former be more preferably embodiment.Understood based on such, technical scheme is substantially in other words to existingThe part for having technology to contribute can be embodied in the form of software product, and the computer software product is stored in oneIn storage medium (such as ROM/RAM, magnetic disc, CD), including some instructions are make it that a station terminal equipment (canTo be mobile phone, computer, server, or network equipment etc.) perform method described in each embodiment of the invention.
A kind of transmitting device of data is additionally provided in the present embodiment, and the device is used to realize above-described embodiment and preferred realMode is applied, repeating no more for explanation had been carried out.As used below, term " module " can realize predetermined work(The combination of the software and/or hardware of energy.Although the device described by following examples is preferably realized with software,Hardware, or the realization of the combination of software and hardware is also that may and be contemplated.
Fig. 3 is the structured flowchart of the transmitting device of data according to embodiments of the present invention, as shown in figure 3, the device includes：Division module 32, for descending time domain unit to be divided into downlink broadcast data time domain unit and downlink service data time domain listMember；Transport module 34, is of coupled connections with division module 32, for transmitting cell by downlink broadcast data time domain unitLevel broadcast data and the reference signal corresponding to cell-level broadcast data, and transmitted by downlink service data time domain unitUser-level data and the reference signal corresponding to user-level data.
Alternatively, the division module being related in the present embodiment is divided according in the following manner to descending time domain unit：WhenDomain figuration；Wherein, time domain inborn nature includes：The directional wave beam figuration of cell-level broadcast wave bean shaping, user class.
In addition, for the number for the downlink broadcast data time domain unit being related in the present embodiment, can by it is following at leastOne of mode determine：Size of data, the budget of downlink broadcast transmission link, the downlink broadcast transmission network of downlink broadcast transmissionNetwork is planned.
It should be noted that for different communication systems, the downlink broadcast data time domain unit being related in the present embodimentPosition be different, for example, in FDD system, the position of downlink broadcast data time domain unit is located atAny time domain unit moment of downstream bands；And in TDD system, downlink broadcast data time domain unitPosition is located at outside the GP time domain units that non-up time domain unit and up-downgoing time domain unit are changed.Wherein, no matter at whichIn individual system, the position for the downlink broadcast data time domain unit being related in the present embodiment is continuously or discontinuously.
It should be noted that in another optional embodiment of the present embodiment, the cell-level being related in the present embodimentBroadcast data includes：Broadcast signaling, broadcast data；Reference signal corresponding to cell-level broadcast data includes：Broadcast letterMake corresponding reference signal, reference signal corresponding with broadcast data；Wherein, downlink broadcast data time domain unit is correspondingAntenna for base station uses broadcast wave bean shaping；User-level data includes：User class signaling, user-level data；Corresponding to userDBMS includes：Reference signal corresponding with user class signaling, reference signal corresponding with user-level data；Wherein, underThe corresponding antenna for base station of row business datum time domain unit uses the directional wave beam figuration based on user class.
Alternatively, the device in the present embodiment also includes：Hoisting module, for passing through downlink broadcast data time domain unitWhen transmitting cell-level broadcast data and the reference signal corresponding to cell-level broadcast data, lifting transmitting cell-level broadcast numberAccording to, and reference signal corresponding with cell-level broadcast data time domain unit power；Wherein, by reducing downlink businessThe scheduling of data time domain unit is to keep total transmission power constant.
It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, Ke YitongCross in the following manner realization, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or, above-mentioned module distinguishes positionIn multiple processors.
The present invention is illustrated with reference to the alternative embodiment of the present invention；
This alternative embodiment is by taking the modification to LTE protocol as an example, because LTE system is with OFDM(Orthogonal Frequency Division Multiplexing, referred to as OFDM) and MIMO are the technology of core,LTE, which has, provides higher data transfer rate, bigger cell capacity, and lower system delay is to be used widely at presentMain flow communication system, and it also has the most deep in existing commercial wireless communication system for the application of multi-antenna technology, the amending method based on this agreement can also be generalized in other wireless communication systems.
Embodiment one
This alternative embodiment uses TD LTE standards, 14GHz working frequency range, and the covering radius of cell is 300km, letterNumber round-trip transmission delay be about 1.99ms.Fig. 4 is according to the uplink/downlink frames structure provided in alternative embodiment one of the present inventionSchematic diagram, as shown in figure 4, be TD LTE standards in the present embodiment, and in order to support 300km covering, therefore needTo be 2ms to the GP length of up-downgoing converted slot.Remaining is entered based on the LTE frame structures that 3GPP LTE protocols are providedRow transformation.In order to support 300km MPS process, to support edge UE access, up 5 continuous sons are distributed toFrame；While in order to lift accounting (the lower industry of usual terminals in wireless communication systems of the descending sub frame relative to sub-frame of uplinkBusiness is both greater than up), continuous two radio frames in LTE protocol are merged into 1 " superframe ", wherein even number radio frames allAs descending sub frame.
Wherein, C and D subframes are descending sub frame, and downlink broadcast subframe and downlink business subframe are corresponded to respectively.C subframesMoment be used for bearing downlink synchronizing signal, Physical Broadcast Channel (Physical Broadcast Channel, referred to as PBCH),System information block (System Information Block, referred to as SIB), paging and its Physical Downlink Control ChannelCommon signal and channels such as (Physical Downlink Control Channel, referred to as PDCCH), antenna for base station are adoptedSent with wide wave beam.
For D subframes, its preceding 3 symbol is fixed as downlink broadcast transmission time slot, and it carries PDCCH and PHICHDeng channel and corresponding reference signal, correspondence moment antenna for base station is launched using broadcast beam；All symbols behind remainingDownlink business transmission time slot is defined as, its UE levels Physical Downlink Shared Channel (Physical Downlink Shared carriedChannel, referred to as PDSCH) level downlink data and correspondence downlink reference signal, its mapping method and position etc. all withThe descending sub frame of conventional LTE protocol is identical, and the moment antenna for base station is sent using narrow beam figuration, and Fig. 5 is according to this hairThe schematic diagram of the frame structure of downlink business subframe in bright alternative embodiment one, for details, reference can be made to shown in Fig. 5.
For C subframes, because it carries the downlink data and signaling of cell, such as accompanying drawing 6 is redesigned to its pilot tone etc.Shown, Fig. 6 is the schematic diagram of the frame structure of the downlink broadcast subframe in alternative embodiment one of the present invention.CRS is only accounted forWith 2 OFDM symbols, wherein the power of CRS symbols can be lifted, the need for correspondence it is vacant go out part RE to protectDemonstrate,prove power and be no more than specified transmission power.Cell-level signaling and the data such as wherein PDSCH carryings SIB, paging.
Embodiment two
This alternative embodiment use FDD LTE standards, the ratio of uplink subframe to downlink subframe situation of present case as shown in Figure 7,Fig. 7 is according to the uplink/downlink frames structural representation provided in alternative embodiment two of the present invention, to require to support more in this programmeCell Broadcast data (video broadcast service), therefore more downlink broadcast subframes are distributed, remaining keeps with LTE protocolUnanimously.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium canThe program code for performing following steps to be arranged to storage to be used for：
Step S1：Descending sub frame is divided into downlink broadcast data burst and downlink service data subframe；
Step S2：Cell-level broadcast data is transmitted and corresponding to cell-level broadcast data by downlink broadcast data burstReference signal, and by downlink service data sub-frame transmission user-level data and corresponding to user-level data reference believeNumber.
Alternatively, the specific example in the present embodiment may be referred to showing described in above-described embodiment and optional embodimentExample, the present embodiment will not be repeated here.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with generalComputing device realizes that they can be concentrated on single computing device, or is distributed in multiple computing devices and is constitutedNetwork on, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to by theyStorage is performed by computing device in the storage device, and in some cases, can be to be held different from order hereinThey, are either fabricated to each integrated circuit modules or will be many in them by the shown or described step of row respectivelyIndividual module or step are fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardwareCombined with software.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the technology of this areaFor personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made is anyModification, equivalent substitution, improvement etc., should be included in the scope of the protection.