CN102449924A - Method and apparatus for transmitting signal using spatial silencing - Google Patents

Method and apparatus for transmitting signal using spatial silencing Download PDF

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Publication number
CN102449924A
CN102449924A CN2010800232333A CN201080023233A CN102449924A CN 102449924 A CN102449924 A CN 102449924A CN 2010800232333 A CN2010800232333 A CN 2010800232333A CN 201080023233 A CN201080023233 A CN 201080023233A CN 102449924 A CN102449924 A CN 102449924A
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information
subcarrier
weighing vector
transmission
carrier
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CN102449924B (en
Inventor
权英现
李文一
具滋昊
郑载薰
文诚颢
韩承希
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LG Electronics Inc
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LG Electronics Inc
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Abstract

The present invention relates to a method for transmitting signals in a heterogeneous network, the method comprising: a step wherein a base station determines a value-added vector for forming a beam pattern to be applied to a subsidiary carrier; a step wherein carrier operation information including information related to the determined value-added vector is transmitted via a primary carrier; and a step wherein the subsidiary carrier is transmitted by applying the determined value-added vector.

Description

The mourn in silence method and apparatus of transmission signals of usage space
Technical field
The present invention relates to a kind of method for transmitting signals, or rather, relate to the method for transmitting signals and the device that in heterogeneous network or in multi-input multi-output system, can improve throughput.
Background technology
Developed wireless communication system widely, so that the various types of communication services such as audio frequency or data, services to be provided.Wireless communication system normally can be supported the multi-address system with a plurality of telex networks through sharing such as the free system resources of bandwidth and through-put power.The example of multi-address system comprises code division multiple access (CDMA) system, frequency division multiple access (FDMA) system, time division multiple access (TDMA) system, OFDM (OFDMA) system, single-carrier frequency division multiple access (SC-FDMA) system and multi-carrier frequency division multiple access (MC-FDMA) system.In wireless communication system, subscriber equipment (UE) can pass through down link (DL) from the base station (BS) reception information and through up link (UL) with message transmission to BS.Information through UE transmission or reception comprises data and various control information, and according to the type of info and the purposes of UE transmission or reception various physical channels is provided.
Summary of the invention
Technical problem
A target of the present invention provides can be with minimized method for transmitting signals of interference effect and the device between a plurality of sub-districts in the heterogeneous network.
Another target of the present invention is to provide the space to mourn in silence to the same carrier wave that share a plurality of sub-districts, so that the interference effect between a plurality of sub-districts in the wireless communication system is minimized.
Target of the present invention be not limited to above-mentioned these, and those skilled in the art will be expressly understood other targets according to following description.
Technical solution
According to one aspect of the present invention of realizing above-mentioned target, a kind of base station that is used for comprises in the method for heterogeneous network transmission signals: the weighing vector with the beam pattern that is applied to subcarrier is confirmed to be used to form in this base station; The carrier operation information that comprises the information that is associated with determined weighing vector through the main carrier transmission; And use determined weighing vector to transmit subcarrier.
Here, subcarrier and main carrier can be through the carrier wave from the transmission of the different frequency range in a plurality of frequency ranges that constitute the available system band.
According to embodiments of the invention; When base station employed carrier wave of supporting of macrocell and the carrier wave that is included in the small cell use in this macrocell were overlapping, the weighing vector with the beam pattern that is applied to subcarrier can optionally be confirmed to be used to form in the base station.
According to embodiments of the invention, confirm that weighing vector can comprise: the message transmission that will be associated with the weighing vector collection through main carrier arrives a plurality of subscriber equipmenies, and the weighing vector collection comprises the one or more available weighing vector that can be applied to subcarrier; From a plurality of subscriber equipment receiving feedback informations; And confirm that based on feedback information weighing vector is concentrated specific to each subscriber equipment weighing vector.
According to embodiments of the invention, this method may further include: from a plurality of subscriber equipment receiving feedback informations, feedback information comprises the interfere information that is associated with channel measurement, be associated with interference between a plurality of sub-districts; And be adjusted at the zone of transmitting the subcarrier after wave beam forms in the macrocell based on this interfere information, the service of macrocell is supported by the base station.
According to embodiments of the invention, this method may further include: confirm to be used to form the weighing vector that the wave beam that is applied to reference signal is formed (wave beam or beam pattern); Transmission of reference signals operation information and transmission have been carried out the reference signal that wave beam forms to it, wherein the reference signal operation information comprise information that is associated with the rank of the wave beam formation that will be applied to reference signal and the information that is associated with antenna amount one of at least.
According to embodiments of the invention; The weighing vector of confirming to be used to form the wave beam formation that will be applied to reference signal can comprise: according to a plurality of frequency ranges that constitute the available system band each, confirm weighing vector so that different weighing vectors is applied to the sub-district public reference signal.
On the other hand; When the subscriber equipment measurement will have been used the carrier wave of wave beam formation to it; Subscriber equipment can be with being delivered to the base station with the relevant information of form that carrier wave is transferred to subscriber equipment; And this information can comprise the information that is associated with resource, and resource is such as being time resource (for example: such as the transmission unit of sub-frame/frame), frequency resource (for example: subcarrier, sub carrier group, perhaps carrier wave or carrier set); Perhaps space resources (for example: space layer), perhaps the sign indicating number resource (for example: frequency expansion sequence, orthogonal resource etc.).When the subscriber equipment report is measured the value of being obtained through carrier wave, can with this message transmission the attached sign of clear channel measurement result or channel measurement.
According to embodiments of the invention; This method may further include: the message transmission that will be associated with subcarrier transmission is to subscriber equipment, and this information comprises and is used to form weighing vector that the wave beam that is applied to subcarrier is formed and the information that is associated with the time/frequency resource that its application of beam is formed weighting; Receive the result's who comprises the channel measurement that uses subcarrier feedback information from subscriber equipment; And use this feedback information that subcarrier is carried out carrier aggregation.
According to another aspect of the present invention of realizing above-mentioned target; A kind of subscriber equipment receives signal in heterogeneous network method can comprise: through main carrier from the base station reception carrier operation information, this carrier operation information comprise with for forming the information that the determined weighing vector of beam pattern will be applied to subcarrier is associated; And reception has been used the subcarrier of weighing vector to it from the base station.
According to embodiments of the invention, this method may further include: receive the information that is associated with the weighing vector collection from the base station through main carrier, this weighing vector collection comprises one or more available weights vectors that can be applied to subcarrier; The receiving downlink signal from the base station has been used at weighing vector this down link signal and has been concentrated each weighing vector that comprises; And the feedback information that is associated with channel measurement result to base station transmits for the DL signal.
Can confirm to be applied to the weighing vector of subcarrier here, based on feedback information.
According to embodiments of the invention, this method may further include: use the down link signal that receives from the base station to carry out channel measurement; To the base station transmits feedback information, this feedback information comprises the interfere information that is associated with channel measurement, be associated with interference between a plurality of sub-districts.
According to embodiments of the invention; This method may further include: receive the information that is associated with the subcarrier transmission from the base station, this information comprises the information that is used to form weighing vector that the wave beam that is applied to subcarrier is formed and is associated with time/frequency resource to its application of beam formation weighting; The feedback information that comprises the result of the channel measurement that uses subcarrier to base station transmits; And reception has been carried out the subcarrier of carrier aggregation based on this feedback information to it.
Here, subcarrier and main carrier can be through the carrier wave from the transmission of the different frequency range in a plurality of frequency ranges that constitute the available system band.
According to another aspect of the present invention of realizing above-mentioned target, the base station in the heterogeneous network can comprise: transport module is used for transmitting wireless signals; Receiver module is used to receive wireless signal; And processor; Be used to confirm to be used to form weighing vector with the beam pattern that is applied to the subcarrier that transmits through transport module; Wherein, Processor uses main carrier that the carrier operation message transmission is arrived subscriber equipment through transport module, and this carrier operation information comprises the information that is associated with determined weighing vector, and after determined weighing vector is applied to subcarrier, through transport module subcarrier is transferred to subscriber equipment.
According to another aspect of the present invention of realizing above-mentioned target, the subscriber equipment in the heterogeneous network can comprise: receiver module is used to receive wireless signal; Transport module is used for transmitting wireless signals; And processor; Based on carrying out channel measurement through the down link signal that receiver module received; Wherein, Subscriber equipment through receiver module use main carrier from the base station reception carrier operation information, this carrier operation information comprise with for forming the information that the determined weighing vector of beam pattern that will be applied to subcarrier is associated, and the subcarrier of weighing vector has been used in reception to it.
According to embodiments of the invention; When subscriber equipment uses main carrier to receive the information that is associated with the weighing vector collection that comprises one or more available weights vectors that can be applied to subcarrier from the base station through receiver module; And receive subsequently it has been used when weighing vector is concentrated the down link signal of each weighing vector that comprises; Processor can be carried out it has been used the channel measurement of concentrating the down link signal of each weighing vector that comprises at weighing vector; And can generate the feedback information that is associated with the channel measurement result, and transmission of feedback information arrived the base station through transport module.
According to embodiments of the invention; When having received from the base station through receiver module, subscriber equipment is used to form weighing vector that the wave beam that is applied to subcarrier is formed and during with information that time/frequency resource that its application of beam is formed is associated; Processor can generate the result's who comprises the channel measurement that uses subcarrier feedback information, and through transport module transmission of feedback information is arrived the base station.
Here, feedback information can comprise the interfere information that is associated with channel measurement, be associated with interference between a plurality of sub-districts.According to another aspect of the present invention of realizing above-mentioned target, the base station in the heterogeneous network can comprise: transport module is used for transmitting wireless signals; Receiver module is used to receive wireless signal; And processor; Be used to confirm to be used to form weighing vector with the beam pattern that is applied to the subcarrier that transmits through transport module; Wherein, This processor uses main carrier will comprise that the carrier operation message transmission of the information that is associated with determined weighing vector arrives subscriber equipment through transport module, and after determined weighing vector is applied to subcarrier, through transport module subcarrier is transferred to subscriber equipment.
According to embodiments of the invention, when the employed carrier wave of supporting by the base station of macrocell be included in carrier wave that small cell is used in the macrocell when overlapping, the weighing vector with the beam pattern that is applied to subcarrier can be confirmed to be used to form in the base station.
According to embodiments of the invention; Processor can generate the information that is associated with the weighing vector collection; The weighing vector collection comprises one or more available weights vectors that can be applied to subcarrier; And through transport module the message transmission that is generated is arrived subscriber equipment, and concentrate the weighing vector of confirming specific to subscriber equipment from weighing vector based on the feedback information that receives from subscriber equipment subsequently.
According to embodiments of the invention; This processing method can be based on the feedback information of the interfere information that comprising of receiving is associated with channel measurement from subscriber equipment through receiver module, be associated with interference between a plurality of sub-districts; Be adjusted at the zone of the subcarrier of transmission after wave beam forms in the macrocell, the service of macrocell is supported by the base station.
According to embodiments of the invention; Processor can confirm to be used to form the weighing vector that the wave beam that is applied to reference signal is formed; Generation comprises the reference signal operation information one of at least of information that the rank that form with the wave beam that will be applied to reference signal are associated and the information that is associated with the quantity of antenna, and through transport module the reference signal operation information is transferred to subscriber equipment.
According to embodiments of the invention; Processor can generate the information that is associated with subcarrier transmission, and this information comprises and is used to form weighing vector that the wave beam that is applied to subcarrier is formed and the information that is associated with time/frequency resource that its application of beam is formed; And the message transmission that will be associated with subcarrier transmission through transport module is to subscriber equipment, and uses the feedback information that is associated with the measurement of the subcarrier that has received from subscriber equipment through receiver module to come subcarrier execution carrier aggregation subsequently.
The foregoing description only is the part of various preferred embodiments of the present invention, and those skilled in the art can draw and understand various other embodiment that can use technical characterictic of the present invention according to the hereinafter detailed description of the present invention.
Advantageous effects
According to embodiments of the invention, because the base station usage space is mourned in silence, so the carrier-specific zone can be controlled in the base station, the interference effect that is applied to neighbor cell can be reduced in this carrier-specific zone.
Advantage of the present invention be not limited to top described those, and those skilled in the art describes according to hereinafter and will be expressly understood other advantages.
Description of drawings
Included in order to providing further understanding of the present invention and to be merged in and the accompanying drawing that constitutes a part of the present invention shows embodiments of the invention, and be used to explain principle of the present invention with describing;
Fig. 1 shows the network configuration of E-UMTS;
Fig. 2 shows the wireless frame structure that in Long Term Evolution (LTE) system, uses;
Fig. 3 shows physical channel that is used for the LTE system and the signal transmission of using this physical channel;
Fig. 4 shows the configuration of the wireless communication system that adds Femto cell BS;
Fig. 5 is the flow chart of example that is used for reducing at heterogeneous network system the signals transmission of presence of intercell interference according to embodiments of the invention;
Fig. 6 shows the example of signals transmission according to an embodiment of the invention;
Fig. 7 shows another example of signals transmission according to an embodiment of the invention;
Fig. 8 show according to embodiments of the invention be used for carrier transmission the time-the frequency resource area; And
Fig. 9 is the block diagram of BS and UE, through this BS and UE can embodiment of the present invention embodiment.
Embodiment
According to the embodiments of the invention that are described with reference to the drawings hereinafter, will easily understand configuration of the present invention, operation and other characteristics.Embodiments of the invention can be used in the various wireless access technologys such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA and MC-FDMA.CDMA may be embodied as the wireless technology such as general land wireless access (UTRA) or CDMA2000.TDMA may be embodied as such as the wireless technology that is used for global system for mobile communications (GSM)/GPRS (GPRS)/enhancing data transfer rate GSM evolution (EDGE).OFDMA may be embodied as the wireless technology such as IEEE 802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, evolution UTRA (E-UTRA) etc.UTRA is the part of Universal Mobile Telecommunications System (UMTS).Third generation partner program (3GPP) Long Term Evolution (LTE) is to use the part of the evolution UTMS (E-UMTS) of E-UTRA, and senior LTE (LTE-A) is the evolution version of 3GPP LTE.
Though the situation that below main reference technical characterictic of the present invention is applied to the 3GPP system is described embodiments of the invention, this only is exemplary and do not limit the present invention.
Though will describe the present invention based on LTE-A, the other system that notion of the present invention that is proposed or method or embodiment can be applied to use multicarrier (for example: the IEEE802.16m system), and not restriction.
Fig. 1 shows the network configuration of E-UMTS.E-UMTS also is called as the LTE system.The widespread deployment communication network is to provide the various communication services such as audio frequency and packet data service.
As shown in fig. 1, the E-UMTS network comprises evolved universal terrestrial radio access network (E-UTRAN), evolution block core (EPC) and subscriber equipment (UE).E-UTRAN can comprise one or more e Node B (eNB) 11, and one or more UE 10 can be positioned at each sub-district.One or more Mobility Management Entity/System Architecture Evolution (MME/SAE) gateway 12 can be positioned at the terminal of network and be connected to external network.In this manual, term " down link " is meant from the communication of eNB 11 to UE 10, and term " up link " is meant from the communication of UE 10 to eNB 11.
UE 10 is the entrained communication equipments of user, and eNB 11 fixed station of normally communicating by letter with UE 10.ENB 11 offers UE 10 with the end points of user plane and control plane.An eNB 11 can be arranged in each sub-district.Being used for transmission user interface professional or that control is professional can use between eNB 11.Each MME/SAE gateway 12 offers UE 10 with the end points of session and mobile management function.ENB 11 can be connected to each other through the S1 interface with MME/SAE gateway 12.
MME provides various functions, and these functions comprise: carry control, the signaling encryption of Non-Access Stratum (NAS) layer and integrity protection to eNB 11 distribution beep-page messages, security control, the control of idle condition mobility, SAE.The SAE gateway host provides various functions, comprising: accomplish plane packet and user plane and switch to support the mobility of UE 10.MME/SAE gateway 12 will abbreviate gateway as in this manual, though it comprises MME and SAE gateway.
A plurality of nodes can connect between gateway 12 and eNB 11 through the S1 interface.ENB 11 can be connected to each other through X2 interface, and adjacent eNB can have mesh network topology, and this structure has X2 interface.Fig. 2 shows the wireless frame structure that in the LTE system, uses.
As shown in Figure 2, radio frames has 10ms (327200 * T S) length and comprise the subframe of 10 identical sizes.Each subframe is 1ms length and the time slot that comprises two 0.5ms.T sRepresent the sampling time and be expressed as T s=1/ (15kHz * 2048)=3.2552 * 10 -8(about 33ns).Time slot is included in a plurality of OFDMs (OFDM) (perhaps SC-FDMA) symbol in the time domain, and is included in a plurality of Resource Block (RB) in the frequency domain.A Resource Block (RB) comprises 12 sub-frame and 7 (6) individual OFDM (perhaps SC-FDMA) symbol in the LTE system.Frame structure Class1 and 2 is respectively applied for FDD and TDD.The frame of frame structure type 2 comprises 2 fields, and each field comprises 5 sub-frame, down link pilot timeslot (DwPTS), protection period (GP) and uplink pilot time slot (UpPTS).Wireless frame structure only is exemplary, and therefore quantity/length, time slot or OFDM (or SC-FDMA) symbol of subframe can change.
Fig. 3 shows physical channel that is used for Long Term Evolution (LTE) system and the signal transmission of using this physical channel.
When UE start or entering sub-district, UE carries out such as the search of initial zone operation (S301) synchronous with BS.For the search of initial zone operation, UE can receive primary synchronization channel (P-SCH) and auxiliary synchronization channel (S-SCH) from BS, and is synchronous to realize with BS, and obtains the information such as sub-district ID.Therefore, UE can receive Physical Broadcast Channel and the sub-district, obtain broadcast message from BS.After accomplishing search of initial zone, UE can receive physical downlink control channel (PDCCH) and receive physical down link sharing channel (PDSCH) according to loaded information in PDCCH, thereby obtains more detailed system information (S302).
Initially insert BS or be not used under the situation of Radio Resource of signal transmission at UE, UE can carry out random access procedure, inserts BS (step S303 to S306) to use RACH (RACH).For random access procedure, UE can transmit particular sequence as leading (S303 and S305) through physical accidental signal (PRACH), and can receive response this leading response message (S304 and S306) through PDCCH with the corresponding PDSCH of PDCCH.Under the situation that inserts at random based on competition, UE can carry out competition solution process extraly.
After carrying out said process, UE can receive PDCCH/PDSCH (S307), and transmitting physical uplink shared channel (PUSCH)/physical uplink control channel (PUCCH) is (S308) as general uplink/downlink signals transmission.
UE comprises ack/nack (ACK/NACK) signal, dispatch request (SR) information, CQI (CQI), precoding matrix indicators (PMI), order designator (RI) etc. to BS or through down link from the control information that BS receives through ul transmissions.Under the situation of 3GPP LTE system, UE can be through the control information of PUSCH and/or PUCCH transmission such as CQI/PMI/RI.
Can make up heterogeneous network and in a sub-district, can have a plurality of small cell.Below description in will be as an example with reference to macrocell and little milli milli sub-district.
Fig. 4 shows the configuration of the wireless communication system that adds little milli milli sub-district BS.
Can make up heterogeneous network, and in macrocell area, can have the small cell such as little milli milli sub-district, little milli milli sub-district is the zone that little milli milli sub-district BS supports service.Each little milli milli sub-district BS is a smaller versions of in macrocell, supporting service macrocell BS.Particularly, little milli milli sub-district BS is the BS of type that can carry out the most function of macrocell BS, and can be installed in the macrocell BS institute region covered or macrocell BS not have in the blind area of covering.Little milli milli sub-district BS has the network configuration of independent operation, and in the shopping centre or room area the Femto cell BS more much bigger than relaying BS quantity can be installed.Therefore, because the amount of information of Femto cell BS tabulation is too big, Femto cell BS tabulation is not included in from BS and is transferred to the neighbor bss tabulation of MS.
As shown in Figure 4, the wireless communication system of interpolation Femto cell BS comprises Femto cell BS 410, grand BS 420, femto network gateway (FNG) 430, access service network (ASN) 440 and connectivity service network (CSN) 450.Grand BS 420 is general BS of conventional wireless communication system.
As the smaller versions of grand BS 420, each little milli milli sub-district BS 410 carries out the most function of macrocell BS.Little milli milli sub-district BS 410 directly inserts transmission control protocol/Internet protocol (TCP/IP) network, and operates independently, and is similar with grand BS 420, and has the covering about 0.1 to 30m.Each little milli milli sub-district BS 410 can hold about 10 to 20 MS.Little milli milli sub-district BS 410 can use the frequency identical with grand BS 420, also can use different frequencies.
Little milli milli sub-district BS 410 is connected to grand BS 420 through the R1 interface, so that Femto cell BS 410 can receive the DL channel from grand BS 420, and can control signal be transferred to grand BS 420.
Femto cell BS 410 can cover the indoor or blind area that 420 of grand BS can not cover, and can support high speed data transfer.Can Femto cell BS410 be installed in the macrocell with overlapping mode, and also can in grand BS 420 unlapped zones, install with non-overlapped mode.
Conventional heterogeneous network or mimo system use the carrier wave ON/OFF scheme of control from the carrier wave of macrocell transmission; To reduce, to improve the link quality of the MS that supports service at macrocell with such as the interference between the small cell of the Femto cell in macrocell.
Use under the situation with such as the identical carrier wave of the small cell of the Femto cell that is arranged in macrocell at macrocell, can close the transmission of this carrier wave, so that minimizing is applied to the interference effect of this small cell.In this case, the small cell zone is realized for the high-throughput with the corresponding carrier wave of carrier wave of in macrocell, having closed it being effective.In addition, if carrier wave ON/OFF scheme is applied to the MS that is positioned at the small cell edge, can reduce not only by small-sized neighbor cell but also by the interference effect that the sub-district caused such as all size of whole cell area.
On the other hand, can the soft fractional frequency reuse scheme of wherein carrying out the relevant control of power division be used for the carrier wave that share a plurality of sub-districts.For example, through in the sub-district that other sub-districts is caused the high interference effect, reducing transmission power level, can reduce the interference effect between a plurality of sub-districts of using same carrier wave.In this case, through reducing the cell size of sharing carrier wave effectively, the sub-district can be used and the corresponding carrier wave of controlled interference level.
Yet if conventional carrier wave ON/OFF scheme is used in the large-scale cell area such as the macrocell that comprises a plurality of MS, the carrier wave on/off operation that is used for specific MS so also can be applied to other MS, reduces the effect that is associated with efficiency of throughput thus.Specifically, if the shared carrier wave in a plurality of sub-districts is carried out shutoff operation, carrier wave can not be used for being positioned at the sub-district MS of sub-district so.
In the heterogeneous network operation, each carrier wave is operated with the isomery pattern.Therefore, under the situation of using carrier wave ON/OFF scheme, exist be difficult to use specific carriers the problem of the various functions that can carry out, wherein each specific carriers can be used for carrying out specific function.
The present invention proposes to reduce the method for transmitting signals of the interference effect between the sub-district, and this method also allows same carrier wave not only to be used in the macrocell also to be used in the small cell that is arranged in macrocell.
To mourn in silence be suitably to adjust the scheme that increases efficiency of throughput and reduce interference effect between the sub-district between the multiple sub-district through the same carrier wave in using a sub-district in the space according to an embodiment of the invention.
In order to explain method for transmitting signals according to an embodiment of the invention, suppose that wave beam is formed for the channel of sharing in the cell area of heterogeneous network or mimo system among the embodiment.
Fig. 5 illustrates the example that is used for reducing interference signals transmission course between the heterogeneous network system sub-district according to embodiments of the invention.
As shown in Figure 5; Support the macrocell BS of macrocell can use space according to the present invention to mourn in silence and transmit carrier wave; So that reduce the interference effect that is applied to such as the small cell of the Femto cell of in macrocell, sharing same carrier wave, wherein macrocell comprises a plurality of small cell such as Femto cell.In the example of mourning in silence in the space, can use wave beam to form so that the signal of carrier wave is transferred to the sub-district except the zone of small cell, and can confirm that the wave beam that will use forms operator scheme (S501).That is, use under the situation of the carrier wave identical, can application of beam form so that with the district of carrier transmission to the zone except this small cell with small cell at the BS of macrocell.
In transmission and a plurality of sub-districts under the situation of the identical carrier wave of employed carrier wave; Can use wave beam to form operation scheme, in this scheme according to subsequently will be in part 1) with 2) and in the method for description form with specific or random pattern wave beam through interval and transmit subcarrier with predetermined period.Here, term " subcarrier " is meant the carrier wave that is used for helping in system main business transmission and reception, and can exchange ground with term " auxilliary carrier wave " and use.Subcarrier can be distinguished with main carrier through frequency division mutually.
System's band is being divided under the situation of a plurality of subbands, can using each subband optionally and independently to carry out mourn in silence (wave beam formation).For example,, can be with the transmission main carrier through boss using under the situation of the subband of dividing based on carrier wave one by one, and can be through auxilliary subband transmission subcarrier.Support that in system each subband is corresponding with component carrier under the situation of carrier aggregation.
In this manual, term " main carrier " and " subcarrier " can use other equivalent terms of any definition to replace, and understand the present invention with better.For example, support in system under the situation of cline frequency piece that with the LTE system similarity, main carrier and subcarrier can be corresponding with the subband that a frequency chunks is divided into (for example, one or more continuous/discrete subcarrier).In addition, support that in system main carrier and subcarrier can define based on component carrier, perhaps can be corresponding with the subband that the one-component carrier wave is divided under the situation of carrier aggregation.
After BS had confirmed to be used for the wave beam formation operation scheme of carrier wave, BS can carry out the minizone that is used for mourning in silence in the space and adjust (S502).Subsequently will be in part 3) the minizone adjustment briefly described.
Carry out wave beam form operation scheme confirm with the minizone adjustment after, BS can transmit subcarrier (S503) through the specific region of whole frequency bandwidth., can be defined as auxilliary band here, and can distinguish mutually with the master tape in the zone that is used to transmit main carrier in the specific region of the frequency bandwidth that is used for transmitting subcarrier.Wave beam form band with auxilliary be with corresponding, and non-wave beam form be with corresponding with master tape.
After this, BS can receive and the feedback information (S504) that has been associated based on reference signal (RS) measured channel information from subscriber equipment (UE) (perhaps mobile radio station (MS)).Here, BS also can application of beam forms and transmits RS, and can to UE each information be provided in advance, with the RS that allows the UE received beam to form.Subsequently will be in part 6) and 7) in concise and to the point the description for UE receive and the process of measure R S.
After UE receives feedback information, BS can carry out control and data channel scheduling to transmit subcarrier (S505) to channel.Subsequently will be in part 8) this process briefly described.
Hereinafter is and concise and to the point description according to the operation of the corresponding BS of step of the signals transmission of the embodiment of the invention described above or UE.
1) carrier beams forms
According to embodiments of the invention, when carrying out carrier transmission, can wave beam be formed and only be applied to the carrier wave (for example, only being applied to subcarrier) except main carrier.For example, can form one or more wave beams for all channels, to minimize the signal effects of jamming that is applied to neighbor cell through the subcarrier transmission.
Fig. 6 shows the example of signals transmission according to an embodiment of the invention.
As shown in Figure 6, BS can confirm that the various wave beams that are used for subcarrier form one of operation scheme (S601).Form in the operation scheme at a wave beam, can define different wave beams according to type and form priority through the subcarrier channel transmitted.
For example; When needs are distinguished with the reception of channel measurement/service quality (QOS)/business or control information is associated transmission channel characteristics; Can will form a plurality of transmitting antennas that the corresponding different weights vector of priority is applied to the emission transmission channel with different beams according to QoS, the professional perhaps significance level of control information.In another example, in the time with regard to channel characteristics, need not distinguishing channel, can use single/a plurality of weighing vectors and be adjusted into identical with the beam pattern of multiple transmit antennas that will be through the subcarrier transmission signals.
Here; If each transmitting antenna is confirmed that independently the mode of weighing vector confirms that wave beam forms operation scheme through distinguishing each channel; BS can notify the information that is associated with the weighing vector that is applied to each antenna to a plurality of UE so, and this information comprises the beam pattern information (S602) of each UE or each UE group.Can comprise with the information that the weighing vector that is applied to each antenna is associated: such as beam pattern information, with the information that the vector correlation of set of weights in (or different) weightings of the various differentiations of representative joins, perhaps can discern sign (indication or the difference) vector of each weighing vector of (or differentiation) or the information that unit is associated with UE.
After receiving beam pattern information, can receive DL signal (S603) through various transmission channel based on each UE of this beam pattern information.
According to embodiments of the invention, BS can adjust wave beam and form pattern, has used the subcarrier that wave beam forms so that can on whole cell area, transmit.
2) random wave bundle forms or periodically wave beam formation
If according to the beam pattern of embodiments of the invention formation subcarrier, the direction of beam pattern possibly not cover whole cell area so.In this case, a plurality of weighing vectors that can cover the All Ranges that requires the signal transmission in the sub-district can be set.Yet when the number of transmit antennas quantity not sufficient, this has reduced efficient.That is, when the number of transmit antennas quantity not sufficient, to such an extent as to too wide its of the shape of bundle ripple pattern possibly cause interference that other sub-districts are not expected.For fear of this problem, need the configuration multi-beam.In order to realize this point, be necessary the antenna that provides a large amount of or be formed on the wave beam of distinguishing on time/frequency/code resources.
Therefore, have at BS under the situation of fewer antennas, can generate wave beam with the time interval and make each wave beam can cover regions of particular service.Can depend on that time/frequency partly uses multi-beam rather than use multi-beam simultaneously here.For example, according to embodiments of the invention, can for example,, change the direction of the beam pattern of subcarrier according to preset rules according to the rule of rotating with wave beam or the wave beam indication is associated.The multi-beam application can be divided (TDD) scheme or frequency domain (FDD) scheme of dividing according to time domain and used wave beam to form, and transmission equipment side can change the direction of wave beam in each special time unit (for example, each subframe).In the TDD scheme, BS can dispose beam pattern makes wave beam be transferred to the zones of different in the sub-district in each time interval, perhaps makes wave beam not be transferred to the zone of the small cell that in macrocell, exists.Perhaps, when using the FDD scheme, the direction of the beam pattern of BS transmission can depend on frequency subsets (for example, the subband wave beam forms (wave beam or beam pattern)) and change.
Use in a plurality of sub-districts under the situation of same carrier wave, can or rotate with the specific period change based on the particular beam pattern of macrocell definition, so that reduce the interference effect between a plurality of sub-districts.For example, in reference to macrocell,, can confirm the direction of wave beam to other macrocells of use same carrier wave through offset applications independently when sequentially by turns during the direction of wave beam.In another example, can be each cell selecting beam direction according to specific pattern (for example, with the interval of specific period, for example 10ms).
When the transmission carrier wave, BS changes under the situation of beam direction when carrying out wave beam formation, and BS can be with the message transmission that is associated with beam pattern to UE.
For from UE receive channel metrical information, BS can use this wave beam control with the interval of specific period.Promptly; BS can carry out aforesaid wave beam need be from UE receives with channel measurement is associated information the time by turns and/or control; Wave beam is rotated and/or control but not always carry out; And can carry out this operation through using specific to the wave beam of particular UE at other times, so that service is provided to this particular UE for particular UE.
Fig. 7 shows another example of signals transmission according to an embodiment of the invention.
As shown in Figure 7, BS is to a plurality of UE broadcast carrier operation informations, and this carrier operation information comprises the information that is associated with the weighing vector collection, and this weighing vector collection comprises one or more weighing vectors (S701) that can be applied to transmitting antenna respectively.Different with this processing, can in BS and/or UE, preset the carrier operation information that comprises weighing vector collection information.
Before confirming to be used for the wave beam formation of subcarrier; BS can use higher level or L1/L2 signaling to come the broadcast carrier operation information through the main carrier that can arrive the All Ranges in the cell area, this carrier operation information comprises the information that is associated with the weighing vector collection that can be used in wave beam formation.Through receiving the feedback information for the broadcast carrier operation information, BS can confirm that how subcarrier being implemented wave beam forms.
After receiving carrier operation information, based on the beam pattern information that is included in the carrier operation information, each UE can receive the DL signal (S702) through various corresponding transmission channel.
UE can come the measured channel state based on the carrier wave that uses corresponding weighing vector transmission, and subsequently can be with the transmission of feedback information that is associated with this measurement result to BS (S703).This feedback information can comprise not only that channel quality information (CQI) and pre-coding matrix index (PMI) also comprise the weighing vector of the best reception state that satisfies UE, the information that is associated with weighing vector that UE can read, the temporal information such as the sub-frame/frame that can be used for obtaining weighing vector, the information that is associated with frequency band, the information that is associated with the resource of using etc.
After receiving feedback message, based on feedback information, BS can confirm that the particular weights vector information that is used for this UE confirms carrier operation scheme (S704) through concentrating from weighing vector.Particularly, BS can confirm to be suitable for transferring signals to the beam pattern of UE based on feedback information, and definite beam pattern is used for the scheme of this UE.That is, BS can confirm to be used for beam pattern is transferred to the weighing vector that UE is positioned at the zone of sub-district.
BS can will form operation information through clean culture and be transferred to UE (S705) for the wave beam that UE confirms subsequently, and use the wave beam formation scheme transmission subcarrier of confirming (S706).
That is, according to embodiments of the invention, BS can be with identical carrier operation information broadcast to all UE that are arranged in the sub-district, and BS can arrive each UE with different beam pattern message transmission after receiving feedback message.Beam pattern information can depend on the position of coverage and/or UE and change.
Here, under the hypothesis situation that (partly at random) wave beam forms at random, UE can be through obtaining to be transferred to the feedback information of BS in the subcarrier measurement.Form configuration information (comprise with information that time/frequency subband/the beam weighting vector information is associated) UE according to the indicated wave beam of BS and can carry out the measurement of particular beam.As the measurement result of particular beam, whether UE can be fit to the information of UE through designator or the ON/OFF scheme that comprises to the configuration of the simple report expression wave beam of BS.In this case, the BS wave beam that can use this ON/OFF information to select part cell coverage information and statistical information to be used for using effectively can often to use forms weighting.
3) be used for the sub-district of subcarrier operation or the communication between the BS
According to embodiments of the invention, BS need carry out sub-district adjustment (perhaps wave beam forms the adjustment of the coverage that arrives), the effect of presence of intercell interference when forming to be minimized in the wave beam of carrying out subcarrier.Form at the definition wave beam before coverage that (perhaps equivalence definition be used for the weighing vector that wave beam forms) arrive carries out the adjustment of this sub-district, need between the sub-district of participating in communication, share interfere information.
Under the situation of small cell,, need obtain interfere information from neighbor cell for subcarrier or main carrier though possibly use or possibly not use the wave beam of subcarrier to form.When UE had used carrier wave to carry out the measurement of beam direction and/or interference, UE can be to Serving cell reporting channel measurement result or PMI information.Perhaps, the BS of Serving cell can carry out in inside from the channel measurement of the UL signal of UE transmission, to obtain the information of presence of intercell interference.Can perhaps can carry out channel measurement based on carrying out channel measurement through the cell special reference that does not have independent precoding (RS) of each subframe transmission based on the RS of precoding.
On the other hand; Be used at subcarrier under the situation of interferometry, can come to concentrate and select a wave beam collection according to forming configuration information (cycle, subband, weighing vector etc.) based on the wave beam of channel measurement information appointment by BS from the wave beam that can be defined as frequency band or subframe.
In the channel measurement information item, need form to the unacceptable wave beam of corresponding transmission cell report.Here, under the situation of a plurality of channel measurements of report, the information that also needs report simultaneously and corresponding measurement setting to be associated such as radio frames information, sub-frame information or sub-band information.
4) subcarrier setting
According to another embodiment of the present invention, use under the situation of same carrier wave at macrocell and small cell, the usage space scheme of mourning in silence does not dispose subcarrier or network facet [s1] special carrier that uses sub-district or cell set special carrier.Therefore, when carry out switching or initial cell when inserting, UE need be to except be not the subcarrier execution channel measurement the subcarrier of this UE appointment.
In heterogeneous network system, in macrocell preset can using system aspect the great quantity of small sub-district of [s2] available carrier wave.Yet the carrier wave of small cell transmission possibly receive the influence of operation scheme of position or the macrocell of small cell.Therefore, through such as the negotiation between the related cell of adjacent macrocell and small cell, can carry out the subcarrier setting that share the sub-district.After subcarrier is consulted, interference or the channel quality and/or the channel information of the subcarrier that small cell can be shared to the macrocell report, and subsequently after receiving report message macrocell can implement can the minimise interference effect wave beam form.
5) staged operation
The LTE-A system can support to constitute the carrier wave of LTE band or LTE-A band.Therefore, can use the LTE band, and the LTE-A band can be used in extra LTE-A optimization with traditional mode and traditional compatibility mode.In the time and frequency zone shown in Fig. 8, can distinguish this broadcast type.
Fig. 8 show be used for according to an embodiment of the invention carrier transmission the time-the frequency resource area.
As shown in Figure 8, the specific region in frequency domain is non-wave beam formation band or the subband 801 that is used to transfer signals to all UE and can be used in the transmission main carrier.Non-wave beam forms is with 801 can form band or master tape 802 differentiations with wave beam, and wave beam forms band or master tape 802 is to can be used in the subband that the subcarrier that wave beam is formed according to embodiments of the invention is transferred to particular UE.
In this structure, can mourned in silence to be defined as in space according to an embodiment of the invention be different from conventional carrier wave and mourns in silence.For example, conventional carrier wave mourn in silence the part subband that is limited to LTE-A band or the part band of LTE band make and in limited band, use carrier transmission ON/OFF scheme.When small cell was operated, this allowed small cell that the subband of mourning in silence is used as carrier wave.That is, the central dispense of the carrier wave that generates is not arrived the center of macrocell carrier wave.Yet small cell can realize low interference level, and does not receive from the interference effect in the subband of mourning in silence of the neighbor cell of cooperating.
The subband of mourning in silence can be set more neatly.When the non-subband of mourning in silence still was used in whole cell area service UE, part or whole bandwidth can be to mourn in silence in the space.The subband of mourning in silence also can weaken the operation of [s3] the non-subband of mourning in silence.
Using under the situation that mourn in silence in the space according to an embodiment of the invention, can only support wave beam to form weighing vector the target subband of having mourned in silence.In time domain shown in Fig. 8 or frequency domain, can change wave beam and form weighing vector.Under the situation of mourning in silence in the subband space, LTE subband and LTE-A subband (the perhaps subband of other types) can be used to the subband of mourning in silence.Under the situation that control channel is mourned in silence, can be the non-new operation of subband definition of mourning in silence.For example, in the time can being used for the License Info of down link or up link through the particular sub-band transmission, subband can be mourned in silence in specific environment.Subsequently, can the control channel of License Info transmission be switched to another subband of not mourning in silence as yet.This shows that additional control channels can be defined as and is used for being used for managing the space control channel that the space of subband (for example, mourn in silence ON/OFF, weighing vector change the License Info etc. of information, the subband of mourning in silence) mourns in silence of mourning in silence.
6) use the subchannel of reference channel to measure
Can mourn in silence with space according to an embodiment of the invention and use various channel measuring methods explicitly.When not being included in the carrier wave that UE receives with the non-subband/subframe of mourning in silence, especially,, can directly carry out channel measurement according to using the subcarrier of mourning in silence when not carrying out non-mourning in silence when measuring when mourning in silence.When having carried out channel measurement, can there be the respective channels that comprises this known symbol and can be shared by a plurality of small cell and macrocell such as the known symbol of leading or reference signal (RS).Known symbol can be shared between BS in advance.Perhaps; UE can receive any BS information transmitted (promptly in many ways; Can search for a plurality of sub-districts and receive information and perhaps be connected to these sub-districts from the sub-district), and can pass through the metrical information that Serving cell perhaps passes through these symbols of UE service-specific cell transmission subsequently.
The space method of mourning in silence according to an embodiment of the invention also RS being carried out under the situation that wave beam forms, can prevent that forming a plurality of UE that exist in the zone of (wave beam or beam pattern) at transmission beam measures the subcarrier that has experienced path loss.This is because when forming through wave beam when in the subcarrier transmitted path loss taking place, according to the precision reduction of the path loss of the shape measure of wave beam.Therefore, can notify the information that rank (perhaps sequence) that UE and wave beam form or the antenna amount that is used for the subcarrier transmission be associated according to the BS of the embodiment of the invention, so that accurately measure the subcarrier that has experienced path loss.
After receiving this information, each UE can carry out the measurement of suitable subcarrier.For example, the public reference signal in the sub-district (CRS) is used for channel measurement, and under the situation that does not have wave beam to form the CRS of small cell transmission neighbor cell to be caused high-caliber interference be under the situation, BS also can carry out wave beam to CRS and form.That is, BS can define the wave beam formation that is used for CRS according to an embodiment of the invention, with the interference that prevents that CRS from being caused.
Here, the UE of the information of received beam formation can form weighing vector according to each wave beam and carry out channel measurement, perhaps can carry out channel measurement based on the unit such as subframe or subband.Yet, in the sub cell zone of carrying out wave beam formation, possibly not have UE, and therefore preferably, various weighing vectors are applied to CRS according to subframe or frequency subband.In this case, UE can convert the measured value of CRS to based on the subframe index of correspondence or the value of frequency band, then, can with the value of this conversion as corresponding to or the subframe index or the frequency band that are independent of the measured value of CRS report to BS.This allows BS to confirm according to pre-defined rule how application of beam forms weighing vector to change the cell area that transmission is used for providing to UE the carrier wave of service.Measure at UE under the situation of subcarrier, similar with the RS of appointment, BS can change wave beam formation weighing vector according to subframe or frequency subband.
When the transmission subcarrier, taken place under the situation of path loss, the precision of the path loss of measurement possibly reduce.Yet if the rank that wave beam forms are not enough height, the amount of beam gain is inessential so, after the amount that general path loss detects error is increased to the amount of about beam gain fully, when calculating path loss, can ignore the amount of beam gain.
The carrier aggregation of the check and correction of 7) mourning in silence from the space
When subcarrier was used as the extra traffic carrier wave that is used for single UE, subcarrier can be represented as and be used for the UE special carrier that DL receives.Yet, because can under non-listening state, manage subcarrier, so, can not estimate that the suitable wave beam that directly is transferred to the signal of UE forms weighting through subcarrier.
Therefore, though subcarrier as general carrier processing, and BS can control the UE operation based on carrier aggregation, it is more effective that the operation that is based on subcarrier defines another kind of operation scheme.For example; When UE has confirmed in advance that through channel measurement suitable beam weighting and the weighting of BS switching-beam are used to control the carrier transmission zone; Form and to add temporary that UE does not receive subcarrier when not using the UE dedicated beams, perhaps form to add and temporary receive subcarrier when using the UE dedicated beams.
In order to realize this operation, BS need transmit the information that is associated with the subcarrier transmission through system information or UE dedicated radio resources control (RRC) signaling, forms time/frequency subband that the weighted sum wave beam forms weighting such as wave beam.In the step S602 of Fig. 6, can transmit with beam pattern information with the information that subcarrier transmission information is associated, perhaps in the step S705 of Fig. 7, form operation information and transmit with wave beam.The information that is associated with subcarrier transmission information can comprise following at least one: be used to transmit subcarrier bandwidth, form pattern, weighting matrix information, antenna configuration information such as the wave beam of the rotational cycle of the size of each subband and/or weighing vector, and the method for measuring the reception signal of subcarrier.
Therefore, BS can be based on confirming carrier aggregation from the detection feedback information of UE transmission.When UE can be with enough high-caliber signal strength detection subcarriers, subcarrier and main carrier can polymerizations.Otherwise, because in corresponding subcarrier transmission region, possibly not have UE, so not to the UE allocation of subcarriers.
8) use control and data channel through subchannel
BS can be based on the feedback information adjustment control channel from the UE transmission.
Usually, need to add extra signaling procedure and receive subcarrier, owing to can not guarantee the UE control channel of from each control channel, decoding to allow UE.
For realizing this point, according to embodiments of the invention, the message transmission that will be associated with the method for the time/frequency of decoding subband is to UE.When UE has received with coding/decoding method is associated information, UE may be received in the subframe of after the direction wave beam shaping of UE present position, having transmitted, and to its decoding.Yet, because time or the frequency decoding of using high-level signaling can define subband through main carrier (the perhaps carrier wave in whole zone) are provided with, so can not initiatively change the decoding method to set up.
Therefore; In usage space is according to an embodiment of the invention mourned in silence the method for transmission signals; After the carrier operation message transmission step of the beam pattern message transmission step of Fig. 6 or Fig. 7; BS can carry out the step of the transmission information that is associated with coding/decoding method, with the dynamic dispatching that allows in any subframe, to be associated with decoding setting.Can transmit the schedule information that the control channel that is used to transmit subcarrier is associated through main carrier.Schedule information can only comprise the indication information of the scheduling that indicates whether to carry out subcarrier or the License Info of subcarrier.
Here, when schedule information only comprises when whether carrying out the indication information of scheduling of subcarrier about sign, UE need be from the subcarrier License Info of decoding.Through comprising the indication information of the various parameters that are associated with decoded positions such as transmission mode, antenna configurations, polymerization rank, search volume index and frequency subband, can reduce complexity of decoding here.
Can predefine be included in the one or more parameters in the indication information through higher level scheduling or L1/L2 control scheduling.Passing through under the situation of the direct transmission permission information of main carrier, License Info can comprise the carrier identification (ID) of subcarrier.Can define carrier wave ID based on the subcarrier that can be used in each UE or all available carrier wave.
As stated, be different from embodiments of the invention, can use the method for opening/closing stream in the spatial domain (for example: unique wave beam forms the zone) in independent environment yet, independent environment is not the physical space such as the cell area of it being used wave beam form.
The method of mourning in silence of space is according to another embodiment of the present invention used transmission ON/OFF scheme in spatial domain, especially use layer ON/OFF scheme.
BS can use transmission ON/OFF scheme in spatial domain, to reduce the interference between macrocell.In the illustrative methods of the information that a transmission is associated with this space method of mourning in silence, open or close the information that is associated with layer and can be transferred to UE through RRC scheduling the form of bitmap (for example, with).For example, be positioned under the situation of a macrocell, can use 3 spatial domains of 12 physical antenna configurations at 12 physical antennas.That is, can determine whether to transfer signals to the specific region in the sub-district through being used for each spatial domain transmission ON/OFF scheme.Here, can open or close through signal transmission in bitmap indication each spatial domain in a sub-district of 3.
, can the ON/OFF method be used for spatial domain here, in the method, use pseudo-random patterns to select it is carried out the spatial domain of on/off operation arbitrarily.
To BS and UE be described with reference to figure 9 hereinafter, through this BS and UE can embodiment of the present invention embodiment.
Fig. 9 is the block diagram of BS and UE, through this BS and UE can embodiment of the present invention embodiment.
UE can be operating as transmission equipment and in down link, be operating as receiving equipment in up link.BS can be operating as receiving equipment and can in down link, be operating as transmission equipment in up link.That is, each UE and BS can comprise and be used to transmit and the transmission equipment and the receiving equipment of reception information or data.
Transmission equipment and receiving equipment can comprise processor, module, part and/or the device of the embodiment that is used for embodiment of the present invention.Particularly, each transmission equipment and receiving equipment can comprise the module (device), the module that is used to analyze encrypted message that are used for encrypting messages, be used to transmit and receive antenna of message etc.
The left side of Fig. 9 shows the structure of the transmission equipment of BS, and the right side shows the structure of receiving equipment of the UE of the sub-district that gets into BS service.Transmission equipment and receiving equipment can comprise antenna 901 and 902, receiver module 910 and 920, processor 930 and 940, transport module 950 and 960 and memory 970 and 980.
Antenna 901 and 902 comprises reception antenna and transmitting antenna, and reception antenna is used for receiving from the outside wireless signal and conveys the received signals to receiver module 910 and 920, and transmitting antenna is used for the signal of transport module 950 and 960 generations is transferred to the outside.When supporting many antennas (MIMO) function, two or more antennas 901 and 902 can be provided.
Receiver module 910 and 920 can be carried out decoding and demodulation to the wireless signal that receives from the outside through antenna, so that this signal is reduced to initial data, and can this initial data be sent to processor 930 and 940.Can receiver module and antenna be embodied as and be used to receive the integrated receiving element of wireless signal but not be embodied as independent module as shown in Figure 9.
The integrated operation of processor 930 and 940 common control transmission equipment or receiving equipment.Particularly, processor 930 and 940 can be carried out the controller function of the embodiment that is used to carry out the invention described above, carry out function, handoff functionality, authentication and the encryption function etc. of the variable control of medium access control (MAC) frame according to service characteristic and wireless environment.
Transport module 950 and 960 can have been dispatched for processor 930 and 940 and will be transferred to outside data execution predictive encoding and modulation, and can this result data be sent to antenna subsequently.Transport module and antenna also may be embodied as the integrated transmission unit that is used for transmitting wireless signals but not are embodied as independent module as shown in Figure 9.
Memory 970 and 980 can be stored the program that is used for through processor 930 and 940 processing and control, and also can temporarily store the I/O data item.Under the situation of UE, the I/O data item of temporary transient storage comprises UL permission, system information, status identifier (STID), flow identifier (FID), operating time etc.
Memory 970 and 980 can comprise following at least a storage medium: flash type, hard disk type, multimedia card are miniature, Card Type (for example, SD or XD memory), random-access memory (ram), static RAM (SRAM), read-only memory (ROM), EEPROM (EEPROM), programmable read-only memory (prom), magnetic memory, disk and light etc.
With reference to figure 5 described embodiments of the invention, the processor 930 of transmission equipment can be carried out the whole control operation of BS according to preceding text, and can executive control operation to support the macrocell area usage space of its service transmission subcarrier of mourning in silence at BS.For example, when subcarrier being carried out wave beam formation, can use the method that changes or rotate beam direction according to pre-defined rule like above-mentioned embodiment.
In order to realize this point; If the message transmission that will be associated with the weighing vector collection that can in transmission equipment, use through transport module 950 arrives receiving equipment, the processor 940 of receiving equipment can arrive transmission equipment as transmission of feedback information with the channel measurement result who is associated with each weighing vector so.That is, the processor 930 of transmission equipment can be confirmed when to receiving equipment transmission carrier wave the weighing vector that is used based on the feedback information that receives, and can use determined weighing vector to carry out wave beam formation.
In this process, the embodiment that the processor 930 of transmission equipment not only can be carried out above-mentioned Fig. 6 or Fig. 8 also can carry out above-mentioned steps 1) and 8) process.
The processor 940 of receiving equipment can be carried out the whole control operation of UE.According to above-described embodiments of the invention; Through transport module 920; Use and the information of mourning in silence and being associated from the space of transmission equipment transmission; Processor 940 can the reception carrier operation information (information that is associated with the scheme that forms based on wave beam), and the information that can use this reception is with reception carrier.
Can processor 930 and 940 be configured to can be through independent (perhaps extra) scheduling but not use DM-RS to be transmitted in each control information item in the above-described embodiments of the invention.BS also can carry out the controlled function of the embodiment of embodiment of the present invention through above-mentioned at least one module; OFDM (OFDMA) packet scheduling; Time division duplex (TDD) packet scheduling and channel multiplexing function; Function according to service characteristic and the variable control of wireless environment execution mac frame; The high speed business Real Time Control Function; Handoff functionality; Authentication and encryption function; The grouping modulation/demodulation function that is used for transfer of data; The high speed packet channel encoding function; Modulated in real time demodulator controlled function etc.Perhaps, BS can also comprise that independent device, module perhaps are used to carry out the parts of these functions.
Provide the detailed description of exemplary embodiment of the present invention, made those skilled in the art can implement and operate the present invention.Though reference example property embodiment has described the present invention, it is apparent to those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention of describing in the accompanying claims, can make various modifications and variation to the present invention.For example, those skilled in the art can make up the structure of describing in the foregoing description in every way.
Therefore, the present invention should not be limited to specific embodiment described here, and should meet the broad range consistent with principle disclosed herein and novel feature.
Industrial applicibility
Can embodiments of the invention be applied to various wireless access systems.For example; Not only can embodiments of the invention be applied to third generation partner program (3GPP) system, 3GPP2 system and/or Institute for Electrical and Electronics Engineers 802.xx system, also can be applied to the various technical fields that to use various wireless access systems.

Claims (18)

1. the method for base station transmits signal in the heterogeneous network, said method comprises:
Confirm to be used to form weighing vector with the beam pattern that is applied to subcarrier;
The carrier operation information that comprises the information that is associated with said definite weighing vector through the main carrier transmission; And
Use said definite weighing vector to transmit said subcarrier.
2. method according to claim 1, wherein, said subcarrier and said main carrier are the carrier waves through the transmission of the different frequency range in a plurality of frequency ranges that constitute the available system band.
3. method according to claim 1 wherein, when the carrier wave that uses when the small cell that comprises in carrier wave that the macrocell of being supported by said base station uses and the said macrocell is overlapping, is optionally carried out the definite of said weighing vector.
4. method according to claim 1, wherein, confirm that said weighing vector comprises:
Through the information that said main carrier is associated with the weighing vector collection to a plurality of user device transmissions, said weighing vector collection comprises one or more available weights vectors that can be applied to said subcarrier;
From said a plurality of subscriber equipment receiving feedback informations; And
Confirm weighing vector based on said feedback information from said weighing vector specific to each subscriber equipment.
5. method according to claim 1 further comprises:
From a plurality of subscriber equipment receiving feedback informations, said feedback information comprise be associated with channel measurement, with a plurality of sub-districts between disturb the interfere information be associated; And
Be adjusted at the zone of transmitting the said subcarrier behind beam forming in the macrocell based on said interfere information, the service of said macrocell is supported by said base station.
6. method according to claim 1 further comprises:
Confirm to be used to form the weighing vector that the wave beam that is applied to reference signal is formed;
Transmission of reference signals operation information, said reference signal operation information comprise information that the rank that form with the wave beam that will be applied to said reference signal are associated and the information that is associated with antenna amount one of at least; And
Transmission is carried out the said reference signal that wave beam forms to it.
7. method according to claim 6; Wherein, Confirming to be used to form the said weighing vector that the said wave beam that is applied to said reference signal is formed comprises: according to each of a plurality of frequency ranges that constitute the available system band; Confirm said weighing vector, make different weighing vectors be applied to the sub-district public reference signal.
8. method according to claim 1 further comprises:
The message transmission that will be associated with subcarrier transmission is to subscriber equipment, and said information comprises and is used to form weighing vector that the wave beam that is applied to said subcarrier is formed and the information that is associated with the time/frequency resource that its application of beam is formed weighting;
Receive the result's who comprises the channel measurement that uses said subcarrier feedback information from said subscriber equipment; And
Use said feedback information that said subcarrier is carried out carrier aggregation.
9. subscriber equipment receives the method for signal in the heterogeneous network, and said method comprises:
Through main carrier from the base station reception carrier operation information, said carrier operation information comprises and is used to form the information that the determined weighing vector of the beam pattern that is applied to subcarrier is associated; And
Receive the said subcarrier of it having been used said weighing vector from said base station.
10. method according to claim 9 further comprises:
Receive the information that is associated with the weighing vector collection through said main carrier from said base station, said weighing vector collection comprises one or more available weights vectors that can be applied to said subcarrier;
It has been used the down link signal of concentrating each weighing vector that comprises at said weighing vector from the reception of said base station; And
The transmission of feedback information that will be associated with the result for the channel measurement of said DL signal is to said base station,
Wherein, confirm to be applied to the said weighing vector of said subcarrier based on said feedback information.
11. method according to claim 9 further comprises:
The down link signal that use receives from said base station is carried out channel measurement;
To said base station transmits feedback information, said feedback information comprises the interfere information that is associated with said channel measurement, be associated with interference between a plurality of sub-districts.
12. method according to claim 9 further comprises:
Receive the information that is associated with the subcarrier transmission from said base station, said information comprises the information that is used to form weighing vector that the wave beam that is applied to said subcarrier is formed and is associated with time/frequency resource to its application of beam formation weighting;
To the said feedback information of said base station transmits, said feedback information comprises the result of the said channel measurement that uses said subcarrier; And
Receive and it has been carried out the said subcarrier of carrier aggregation based on said feedback information.
13. method according to claim 9, wherein, said subcarrier is the carrier wave through the different band transmissions in a plurality of frequency ranges that constitute the available system band with said main carrier.
14. the base station in the heterogeneous network, said base station comprises:
Transport module, said transport module is used for transmitting wireless signals;
Receiver module, said receiver module is used to receive wireless signal; And
Processor, said processor is used to confirm to be used to form the weighing vector of beam pattern, and said beam pattern will be applied to the subcarrier through said transport module transmission,
Wherein, Said processor uses main carrier will comprise that the carrier operation message transmission of the information that is associated with said definite weighing vector arrives subscriber equipment through said transport module; And after said definite weighing vector is applied to said subcarrier, said subcarrier is transferred to said subscriber equipment through said transport module.
15. the subscriber equipment in the heterogeneous network, said subscriber equipment comprises:
Receiver module, said receiver module is used to receive wireless signal;
Transport module, said transport module is used for transmitting wireless signals; And
Processor, said processor is carried out channel measurement based on the down link signal that receives through said receiver module,
Wherein, Said subscriber equipment uses main carrier through said receiver module, and reception comprises and the carrier operation information that is used to form the information that the determined weighing vector of the beam pattern that is applied to subcarrier is associated from the base station, and receives the said subcarrier of it having been used said weighing vector.
16. subscriber equipment according to claim 15; Wherein, When said subscriber equipment uses said main carrier to receive the information that is associated with the weighing vector collection that comprises one or more available weights vectors that can be applied to said subcarrier from said base station through said receiver module; And receive subsequently it has been used when said weighing vector is concentrated the down link signal of each weighing vector that comprises; Said processor is carried out it has been used the channel measurement of concentrating the said down link signal of each weighing vector that comprises at said weighing vector; And the feedback information that generation is associated with the result of said channel measurement, and through said transport module with said transmission of feedback information to said base station.
17. subscriber equipment according to claim 15, wherein, said feedback information comprises the interfere information that is associated with said channel measurement, be associated with interference between a plurality of sub-districts.
18. subscriber equipment according to claim 15; Wherein, When having received from said base station through said receiver module, said subscriber equipment is used to form weighing vector that the wave beam that is applied to said subcarrier is formed and during with information that the time/frequency resource that its application of beam is formed weighting is associated; Said processor generates the result's who comprises the channel measurement that uses said subcarrier feedback information, and through said transport module said transmission of feedback information is arrived said base station.
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