CN102449924B - The method and apparatus of usage space quiet transmission signal - Google Patents

The method and apparatus of usage space quiet transmission signal Download PDF

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Publication number
CN102449924B
CN102449924B CN201080023233.3A CN201080023233A CN102449924B CN 102449924 B CN102449924 B CN 102449924B CN 201080023233 A CN201080023233 A CN 201080023233A CN 102449924 B CN102449924 B CN 102449924B
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weighing vector
information
subcarrier
transmission
subscriber equipment
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CN102449924A (en
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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 kind of method for signal transmission in heterogeneous network, the method comprises: base station determines the step of the added value vector of the beam pattern formed being applied to subcarrier; The step with the carrier operation information of the information of determined added value vector correlation is comprised via main carrier transmission; And by applying the step of the added value vector transmission subcarrier determined.

Description

The method and apparatus of usage space quiet transmission signal
Technical field
The present invention relates to a kind of method for transmitting signals, or rather, relate to the method for transmitting signals and device that can improve throughput in heterogeneous network or in multi-input multi-output system.
Background technology
Develop wireless communication system widely, to provide various types of communication services of such as audio frequency or data, services.Wireless communication system normally can support the multi-address system with multiple telex network by the free system resources sharing such as bandwidth sum 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 a wireless communication system, subscriber equipment (UE) can pass through down link (DL) from base station (BS) receive information and by up link (UL) by information transmission to BS.The information transmitted by UE or receive comprises data and various control information, and provides various physical channel according to UE transmission or the type of information received and purposes.
Summary of the invention
Technical problem
A target of the present invention is to provide can by the minimized method for transmitting signals of interference effect between the multiple communities in heterogeneous network and device.
Another target of the present invention is that the same carrier wave shared to multiple community provides space to mourn in silence, to be minimized by the interference effect between the multiple communities in wireless communication system.
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 description below.
Technical solution
According to the one aspect of the present invention realizing above-mentioned target, a kind ofly to comprise for base station method of signal transmission in heterogeneous network: this base station determines being formed the weighing vector of the beam pattern that will be applied to subcarrier; The carrier operation information of the information be associated with determined weighing vector is comprised by main carrier transmission; And use determined weighing vector to transmit subcarrier.
Herein, subcarrier and main carrier can be by the carrier wave from the different frequency range transmission formed in multiple frequency ranges of available system band.
According to embodiments of the invention, when the carrier wave that the macrocell supported when base station uses is overlapping with the carrier wave that the small cell be included in this macrocell uses, base station optionally can determine the weighing vector of the beam pattern formed being applied to subcarrier.
According to embodiments of the invention, determine that weighing vector can comprise: by main carrier by the information transmission that is associated with weighing vector collection to multiple subscriber equipment, weighing vector collection comprises the one or more available weighing vector that can be applied to subcarrier; From multiple subscriber equipment receiving feedback information; And concentrate specific to each subscriber equipment weighing vector based on feedback information determination weighing vector.
According to embodiments of the invention, the method may further include: from multiple subscriber equipment receiving feedback information, and feedback information comprises the interfere information be associated with the interference between multiple community be associated with channel measurement; And the region of the subcarrier after transmitting after beamforming in macrocell based on the adjustment of this interfere information, the service of macrocell is supported by base station.
According to embodiments of the invention, the method may further include: the weighing vector determining the Wave beam forming (wave beam or beam pattern) formed being applied to reference signal; Transmission of reference signals operation information and transmission has performed the reference signal of Wave beam forming to it, wherein reference signal operation information comprise the information be associated with by the rank of the Wave beam forming being applied to reference signal and the information be associated with antenna amount one of at least.
According to embodiments of the invention, determine forming the weighing vector that will be applied to the Wave beam forming of reference signal can comprise: according to each of multiple frequency ranges forming available system band, determine weighing vector different weighing vectors is applied to cell common reference signal.
On the other hand, when subscriber equipment is measured when applying the carrier wave of Wave beam forming to it, subscriber equipment can be delivered to base station by the information that carrier wave is transferred to the form of subscriber equipment relevant, and this information can comprise the information be associated with resource, the all time resources in this way of resource (such as: the transmission unit of such as sub-frame/frame), frequency resource are (such as: subcarrier, subcarrier group, or carrier wave or carrier wave set), or space resources (such as: space layer), or code resource (such as: frequency expansion sequence, orthogonal resource etc.).When subscriber equipment report measures obtained value by carrier wave, can be the attached mark of clear channel measurement result or channel measurement by this information transmission.
According to embodiments of the invention, the method may further include: transmit the information transmission that is associated to subscriber equipment by with subcarrier, and this information comprises for the formation of the weighing vector of the Wave beam forming by being applied to subcarrier and the information that is associated with the time/frequency resource forming weighting to its application of beam; The feedback information of the result comprising the channel measurement using subcarrier is received from subscriber equipment; And use this feedback information sub-carrier to perform carrier aggregation.
According to the another aspect of the present invention realizing above-mentioned target, the method of subscriber equipment Received signal strength in heterogeneous network can comprise: by main carrier from a base station reception carrier operation information, this carrier operation information comprise with for forming the information that the determined weighing vector of the beam pattern that will be applied to subcarrier is associated; And the subcarrier it being applied to weighing vector is received from base station.
According to embodiments of the invention, the method may further include: received the information be associated with weighing vector collection from base station by main carrier, and this weighing vector collection comprises one or more available weights vectors that can be applied to subcarrier; From base station receiving downlink signal, this down link signal is applied and concentrated at weighing vector each weighing vector comprised; And to the feedback information that base-station transmission is associated with the channel measurement for DL signal.
Herein, can determine to be applied to the weighing vector of subcarrier based on feedback information.
According to embodiments of the invention, the method may further include: use the down link signal received from base station to perform channel measurement; To base-station transmission feedback information, this feedback information comprises the interfere information be associated with the interference between multiple community be associated with channel measurement.
According to embodiments of the invention, the method may further include: receive from base station and transmit with subcarrier the information be associated, and this information comprises for the formation of the weighing vector of the Wave beam forming by being applied to subcarrier and the information that is associated with the time/frequency resource forming weighting to its application of beam; The feedback information of the result of the channel measurement using subcarrier is comprised to base-station transmission; And receive the subcarrier based on this feedback information, it having been performed to carrier aggregation.
Herein, subcarrier and main carrier can be by the carrier wave from the different frequency range transmission formed in multiple frequency ranges of available system band.
According to the another aspect of the present invention realizing above-mentioned target, the base station in heterogeneous network can comprise: transport module, for transmitting wireless signals; Receiver module, for receiving wireless signal; And processor, for determining the weighing vector of the beam pattern formed being applied to the subcarrier transmitted by transport module, wherein, processor uses main carrier by carrier operation information transmission to subscriber equipment by transport module, this carrier operation information comprises the information be associated with determined weighing vector, and by transport module, subcarrier is transferred to subscriber equipment after determined weighing vector is applied to subcarrier.
According to the another aspect of the present invention realizing above-mentioned target, the subscriber equipment in heterogeneous network can comprise: receiver module, for receiving wireless signal; Transport module, for transmitting wireless signals; And processor, channel measurement is performed based on the down link signal received by receiver module, wherein, subscriber equipment uses main carrier from base station reception carrier operation information by receiver module, this carrier operation information comprise with for forming the information be associated by determined for the beam pattern being applied to subcarrier weighing vector, and receive and it applied to the subcarrier of weighing vector.
According to embodiments of the invention, when subscriber equipment uses main carrier to receive the information be associated with the weighing vector collection comprising one or more available weights vectors that can be applied to subcarrier from base station by receiver module, and receive subsequently and apply when weighing vector concentrates the down link signal of each weighing vector comprised to it, processor can perform and apply to it channel measurement concentrating the down link signal of each weighing vector comprised at weighing vector, and the feedback information be associated with channel measurement can be generated, and by transport module by transmission of feedback information to base station.
According to embodiments of the invention, when subscriber equipment by receiver module to receive from base station for the formation of the weighing vector of the Wave beam forming by being applied to subcarrier and be associated with the time/frequency resource formed its application of beam information time, processor can generate the feedback information of result comprising the channel measurement using subcarrier, and by transport module by transmission of feedback information to base station.
Herein, feedback information can comprise the interfere information be associated with the interference between multiple community be associated with channel measurement.According to the another aspect of the present invention realizing above-mentioned target, the base station in heterogeneous network can comprise: transport module, for transmitting wireless signals; Receiver module, for receiving wireless signal; And processor, for determining the weighing vector of the beam pattern formed being applied to the subcarrier transmitted by transport module, wherein, this processor uses main carrier to comprise the carrier operation information transmission of the information be associated with determined weighing vector to subscriber equipment by transport module, and after determined weighing vector is applied to subcarrier, by transport module, subcarrier is transferred to subscriber equipment.
According to embodiments of the invention, when the carrier wave that the macrocell supported by base station uses is overlapping with the carrier wave that small cell uses be included in macrocell, base station can determine the weighing vector of the beam pattern formed being applied to subcarrier.
According to embodiments of the invention, processor can generate the information be associated with weighing vector collection, weighing vector collection comprises one or more available weights vectors that can be applied to subcarrier, and by transport module by generated information transmission to subscriber equipment, and concentrate the weighing vector determined specific to subscriber equipment subsequently from weighing vector based on the feedback information received from subscriber equipment.
According to embodiments of the invention, this processing method can based on the feedback information comprising the interfere information be associated with the interference between multiple community be associated with channel measurement received from subscriber equipment by receiver module, adjust the region of the subcarrier after transmitting after beamforming in macrocell, the service of macrocell is supported by base station.
According to embodiments of the invention, processor can determine the weighing vector of the Wave beam forming formed being applied to reference signal, generate the reference signal operation information one of at least comprising the information be associated with by the rank of the Wave beam forming being applied to reference signal and the information be associated with the quantity of antenna, and be transferred to subscriber equipment by transport module Reference Signal operation information.
According to embodiments of the invention, processor can generate and transmit with subcarrier the information be associated, and this information comprises for the formation of the weighing vector of the Wave beam forming by being applied to subcarrier and the information that is associated with the time/frequency resource formed its application of beam; And transmit the information transmission that is associated to subscriber equipment by transport module by with subcarrier, and use the feedback information be associated with the measurement of the subcarrier received from subscriber equipment by receiver module to carry out sub-carrier subsequently to perform carrier aggregation.
Above-described embodiment is only a part for various preferred embodiment of the present invention, and those skilled in the art can draw according to hereafter detailed description of the present invention and understand other embodiments various can applying technical characteristic of the present invention.
Advantageous effects
According to embodiments of the invention, because base station usage space is mourned in silence, so base station can control carrier-specific region, the interference effect being applied to neighbor cell can be reduced in this carrier-specific region.
Advantage of the present invention be not limited to described above those, and those skilled in the art according to hereafter describe will be expressly understood other advantages.
Accompanying drawing explanation
Included in order to provide a further understanding of the present invention and to be merged in and the accompanying drawing forming a part of the present invention shows embodiments of the invention, and together with the description for explaining principle of the present invention;
Fig. 1 shows the network configuration of E-UMTS;
Fig. 2 shows the wireless frame structure used in Long Term Evolution (LTE) system;
Fig. 3 show for LTE system physical channel and use the Signal transmissions of this physical channel;
Fig. 4 shows the configuration of the wireless communication system adding Femto cell BS;
Fig. 5 is for reducing the flow chart of the example of the signals transmission of presence of intercell interference in heterogeneous network system 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 for carrier transmission time-frequency resource area; And
Fig. 9 is the block diagram of BS and UE, can implement embodiments of the invention by this BS and UE.
Embodiment
According to the embodiments of the invention described at hereinafter with reference accompanying drawing, configuration of the present invention, operation and other features easily will be understood.Embodiments of the invention can be used in the various wireless access technologys of such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA and MC-FDMA.CDMA may be embodied as the wireless technology of such as general land wireless access (UTRA) or CDMA2000.TDMA may be embodied as such as the wireless technology of global system for mobile communications (GSM)/GPRS (GPRS)/enhancing data transfer rate GSM evolution (EDGE).OFDMA may be embodied as the wireless technology of such as IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE802.20, 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 the part of the evolution UTMS (E-UMTS) using E-UTRA, and senior LTE (LTE-A) is the evolution version of 3GPPLTE.
Although technical characteristic of the present invention for Primary Reference is applied to the situation of 3GPP system to describe embodiments of the invention below, this is only exemplary and do not limit the present invention.
Although will describe the present invention based on LTE-A, the concept of the present invention proposed or method or embodiment can be applied to the other system (such as: IEEE802.16m system) using multicarrier, and do not limit.
Fig. 1 shows the network configuration of E-UMTS.E-UMTS is also referred to as LTE system.Widespread deployment communication network is to provide the various communication services of such as audio frequency and packet data service.
As shown in fig. 1, 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 UE10 can be positioned at each community.One or more Mobility Management Entity/System Architecture Evolution (MME/SAE) gateway 12 can be positioned at the end of network and be connected to external network.In this manual, term " down link " refers to the communication from eNB11 to UE10, and term " up link " refers to the communication from UE10 to eNB11.
UE10 is the communication equipment entrained by user, and the fixed station that eNB11 normally communicates with UE10.The end points of user plane and control plane is supplied to UE10 by eNB11.An eNB11 can be arranged in each community.Interface for transmission user business or service control can use between eNB11.The end points of session and mobile management function is supplied to UE10 by each MME/SAE gateway 12.ENB11 and MME/SAE gateway 12 can be connected to each other by S1 interface.
MME provides various function, and these functions comprise: to eNB11 distribution beep-page message, security control, Idle State Mobility control, SAE Bearer Control, the encryption of Non-Access Stratum (NAS) layer signaling and integrity protection.SAE gateway host provides various function, comprising: complete plane packet and user plane and switch with the mobility supporting UE10.MME/SAE gateway 12 in this manual will referred to as gateway, although it comprises MME and SAE gateway.
Multiple node can be connected between gateway 12 and eNB11 by S1 interface.ENB11 can be connected to each other by X2 interface, and adjacent eNB can have mesh network topology, and this structure has X2 interface.Fig. 2 shows the wireless frame structure used in LTE system.
As shown in Figure 2, radio frames has 10ms (327200 × T s) length and comprise the subframe of 10 formed objects.Each subframe is 1ms length and comprises the time slot of 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 comprises multiple OFDMs (OFDM) (or SC-FDMA) symbol in the time domain, and comprises multiple Resource Block (RB) in a frequency domain.In LTE system, a Resource Block (RB) comprises 12 subframes and 7 (6) individual OFDM (or SC-FDMA) symbols.Frame structure Class1 and 2 is respectively used to FDD and TDD.The frame of frame structure type 2 comprises 2 fields, and each field comprises 5 subframes, down link pilot timeslot (DwPTS), protective time slot (GP) and uplink pilot time slot (UpPTS).Wireless frame structure is only exemplary, and therefore quantity/the length of subframe, time slot or OFDM (or SC-FDMA) symbol can change.
Fig. 3 show for Long Term Evolution (LTE) system physical channel and use the Signal transmissions of this physical channel.
When UE start or when entering community, UE performs such as synchronous with BS search of initial zone operation (S301).For search of initial zone operation, UE can receive primary synchronization channel (P-SCH) and auxiliary synchronization channel (S-SCH) from BS, synchronous with BS to realize, and obtains the information of such as community ID.Therefore, UE can receive Physical Broadcast Channel from BS and obtain broadcast message in the cell.After completing search of initial zone, UE can receive physical down link sharing channel (PDSCH) according to the receives information physical downlink control channel (PDCCH) carried in PDCCH, thus obtains more detailed system information (S302).
When UE initially accesses BS or the Radio Resource not used for Signal transmissions, UE can perform random access procedure, accesses BS (step S303 to S306) to use Random Access Channel (RACH).For random access procedure, UE can transmit particular sequence as leading (S303 and S305) by physical accidental signal (PRACH), and can receive this leading response message (S304 and S306) of response by PDCCH and the PDSCH corresponding with PDCCH.When the Stochastic accessing based on competition, UE can perform contention resolved process extraly.
After execution said process, UE can receive PDCCH/PDSCH (S307), and transmitting physical uplink shared channel (PUSCH)/physical uplink control channel (PUCCH) (S308) is 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 by down link from the control information that BS receives by ul transmissions.When 3GPPLTE system, UE can transmit the control information of such as CQI/PMI/RI by PUSCH and/or PUCCH.
Can heterogeneous network be built and multiple small cell can be there is in one cell.In description below with reference to macrocell and Wei Haohao community exemplarily.
Fig. 4 shows the configuration of the wireless communication system adding Wei Haohao community BS.
Can heterogeneous network be built, and the small cell of such as Wei Haohao community can be there is in macrocell area, the region of Shi Weihaohao community, Wei Haohao community BS Service supportive.Each Wei Haohao community BS is the smaller versions of Service supportive macrocell BS in macrocell.Specifically, Wei Haohao community BS is the BS of the type of most of function that can perform macrocell BS, and can be arranged in the region that macrocell BS covers or macrocell BS does not have in chlamydate blind area.Wei Haohao community BS has the network configuration of independent operation, and can install the Femto cell BS more much bigger than relaying BS quantity in shopping centre or room area.Therefore, because the amount of information of Femto cell BS list is too large, Femto cell BS list is transferred to not included in the neighbor bss list of MS not included in from BS.
As shown in Figure 4, the wireless communication system adding Femto cell BS comprises Femto cell BS410, grand BS420, femto network gateway (FNG) 430, access service network (ASN) 440 and connectivity service network (CSN) 450.Grand BS420 is the general BS of conventional wireless communication system.
As the smaller versions of grand BS420, each Wei Haohao community BS410 performs most of function of macrocell BS.Wei Haohao community BS410 directly accesses transmission control protocol/Internet protocol (TCP/IP) network, and operates independently, similar to grand BS420, and has the covering about 0.1 to 30m.Each Wei Haohao community BS410 can hold about 10 to 20 MS.Wei Haohao community BS410 can use the frequency identical with grand BS420, also can use different frequencies.
Wei Haohao community BS410 is connected to grand BS420 by R1 interface, so that Femto cell BS410 can receive DL channel from grand BS420, and control signal can be transferred to grand BS420.
Femto cell BS410 can cover the indoor or blind area that grand BS420 can not cover, and can support high speed data transfer.In an overlapping manner Femto cell BS410 can be arranged in macrocell, and also can install in the unlapped region of grand BS420 in non-overlapped mode.
Conventional heterogeneous network or mimo system use the carrier wave ON/OFF scheme of the carrier wave controlled from macrocell transmission, to reduce the interference between macrocell and the small cell of the Femto cell such as in macrocell, to improve the link quality of the MS of Service supportive.
When macrocell uses the carrier wave identical with the small cell of the Femto cell being such as arranged in macrocell, the transmission of this carrier wave can be closed, to reduce the interference effect being applied to this small cell.In this case, the high-throughput realized for the carrier wave corresponding with the carrier wave of closing in macrocell region, small cell is effective.In addition, if carrier wave ON/OFF scheme is applied to the MS being positioned at edge, small cell, can reduce not only by small-sized neighbor cell but also the interference effect that caused by the community of the such as all size of whole cell area.
On the other hand, the soft fractional frequency reuse scheme wherein performing power division relevant control can be used for the carrier wave that multiple community is shared.Such as, by causing other communities reducing transmission power level in the community of high interference effect, the interference effect between the multiple communities using same carrier wave can reduced.In this case, by effectively reducing the cell size of shared carrier wave, community can use the carrier wave corresponding with controlled interference level.
But if the carrier wave ON/OFF scheme of routine is used in the region, Big Residential District of the macrocell such as comprising multiple MS, the carrier wave on/off operation so for specific MS also can be applied to other MS, reduce the effect be associated with efficiency of throughput thus.Specifically, if perform shutoff operation to the carrier wave that multiple community is shared, so carrier wave can not be used for the community MS being arranged in community.
In heterogeneous network operation, each carrier wave operates with heterogeneous schemas.Therefore, when using carrier wave ON/OFF scheme, there is the problem being difficult to the various functions using specific carriers to perform, wherein each specific carriers can be used for performing specific function.
The present invention proposes the method for transmitting signals of the interference effect reduced between community, and the method also allows same carrier wave to be not only used in the small cell that also can be used in macrocell and be arranged in macrocell.
Mourn in silence in space is according to an embodiment of the invention carry out suitably adjustment between multiple community by the same carrier wave in use community increase efficiency of throughput and reduce the scheme of interference effect between community.
In order to explain method for transmitting signals according to an embodiment of the invention, suppose that Wave beam forming is used for the channel shared in the cell area of heterogeneous network in embodiment or mimo system.
Fig. 5 illustrates according to embodiments of the invention for reducing the example of the signals transmission disturbed between heterogeneous network system small area.
As shown in Figure 5, support that the macrocell BS of macrocell can use space according to the present invention to mourn in silence and transmit carrier wave, to reduce the interference effect of the small cell being applied to the Femto cell of such as sharing same carrier wave in macrocell, wherein macrocell comprises multiple small cell of such as Femto cell.In the example mourned in silence in space, can Wave beam forming be used so that by the Signal transmissions of carrier wave to the community except the region of small cell, and the Wave beam forming operator scheme (S501) that will use can be determined.That is, when the BS of macrocell uses the carrier wave identical with small cell, can application of beam be formed so that by the district of carrier transmission to the region except this small cell.
When transmitting the carrier wave identical with the carrier wave used in multiple community, Wave beam forming operation scheme can be used, in this scenario according to subsequently by part 1) and 2) in the method for description by transmitting subcarrier with the interval of predetermined period with specific or random pattern Wave beam forming.Herein, term " subcarrier " refers to the carrier wave for helping main business to transmit and receive in systems in which, and can use interchangeably with term " auxiliary carrier wave ".Subcarrier can be distinguished mutually by frequency division and main carrier.
When system band is divided into multiple subband, can uses each subband optionally and perform independently and mourn in silence (Wave beam forming).Such as, when the subband based on carrier wave application division one by one, transmission main carrier can be with by boss, and can by auxiliary subband transmission subcarrier.When system supports carrier aggregation, each subband is corresponding with component carrier.
In this manual, term " main carrier " and " subcarrier " can replace by other equivalent terms of definition arbitrarily, better to understand the present invention.Such as, when system supports cline frequency block, similar to LTE system, main carrier and subcarrier can corresponding with the subband that a frequency chunks is divided into (such as, continuously one or more/discrete subcarriers).In addition, when system supports carrier aggregation, main carrier and subcarrier can define based on component carrier, or the subband that can be divided into one-component carrier wave is corresponding.
After BS has determined the Wave beam forming operation scheme for carrier wave, BS can perform minizone adjustment (S502) of mourning in silence for space.Subsequently will in part 3) concise and to the point minizone adjustment is described.
After execution Wave beam forming operation scheme is determined to adjust with minizone, BS can by specific region transmission subcarrier (S503) of whole frequency bandwidth.Herein, auxiliary band can be defined as the specific region of transmitting in the frequency bandwidth of subcarrier, and can distinguish mutually with the master tape in the region for transmitting main carrier.Wave beam forming band is corresponding with auxiliary band, and non-beamforming band is corresponding with master tape.
After this, BS can receive from subscriber equipment (UE) (or mobile radio station (MS)) feedback information (S504) be associated with the channel information measured based on reference signal (RS).Herein, BS also can application of beam be formed to transmit RS, and can provide each information to UE in advance, with the RS allowing UE received beam to be formed.Subsequently will in part 6) and 7) in concise and to the point description UE received and measures the process of RS.
After receiving feedback information from UE, BS can to channel perform control and data channel scheduling to transmit subcarrier (S505).Subsequently will in part 8) concise and to the point this process is described.
It is hereafter the concise and to the point description of the operation of BS or UE corresponding with the step of the signals transmission of the embodiment according to the invention described above.
1) carrier beams is formed
According to embodiments of the invention, when performing carrier transmission, Wave beam forming only can be applied to the carrier wave (such as, being only applied to subcarrier) except main carrier.Such as, one or more wave beam can be formed, to minimize the effect of the signal disturbing being applied to neighbor cell for all channels transmitted by subcarrier.
Fig. 6 shows the example of signals transmission according to an embodiment of the invention.
As shown in Figure 6, one of BS various Wave beam forming operation schemes that can determine subcarrier (S601).In a Wave beam forming operation scheme, different Wave beam forming priorities can be defined according to the type of the channel transmitted by subcarrier.
Such as, when needing to distinguish the transmission channel characteristics be associated with the reception of channel measurement/service quality (QOS)/business or control information, according to the significance level of QoS, business or control information, can be applied to the different weights vector that different beams forms priority corresponding the multiple transmitting antennas launching transmission channel.In another example, when not needing to distinguish channel with regard to channel characteristics, single/multiple weighing vector can be applied so that the beam pattern of the multiple transmit antennas by subcarrier signal transmission is adjusted to identical.
Herein, if with the mode determination Wave beam forming operation scheme by each channel of differentiation, each transmitting antenna being determined to independently weighing vector, so BS can notify to multiple UE the information that is associated with the weighing vector being applied to each antenna, and this information comprises the beam pattern information (S602) of each UE or each UE group.Can comprise from the information that the weighing vector being applied to each antenna is associated: such as beam pattern information, the information that join with the vector correlation of set of weights represented in (or different) weighting of various differentiation, or the information that the vectorial or unit of the mark (indicate or distinguish) of each weighing vector of (or differentiation) is associated can be identified with UE.
After receiving beam pattern information, the DL signal (S603) by various transmission channel can be received based on each UE of this beam pattern information.
According to embodiments of the invention, BS can adjust Wave beam forming pattern, can transmit the subcarrier applying Wave beam forming in whole cell area.
2) opportunistic beamforming or periodically Wave beam forming
If form the beam pattern of subcarrier according to embodiments of the invention, so the direction of beam pattern may not cover whole cell area.In this case, multiple weighing vectors that can cover all regions requiring Signal transmissions in a community can be set.But, when number of transmit antennas quantity not sufficient, it reduce efficiency.That is, when number of transmit antennas quantity not sufficient, the shape of bundle ripple pattern too wide to such an extent as to its may cause the less desirable interference in other communities.In order to avoid this problem, need to configure multi-beam.In order to realize this point, be necessary a large amount of antennas to be provided or to be formed in the wave beam that time/frequency/code resource is distinguished.
Therefore, when BS has a small amount of antenna, wave beam can be generated with the time interval and make each wave beam to cover regions of particular service.Herein, can depend on that time/frequency partly uses multi-beam instead of uses multi-beam simultaneously.Such as, according to embodiments of the invention, according to preset rules, such as, can indicate according to wave beam rotation or wave beam the rule be associated, change the direction of the beam pattern of subcarrier.Multi-beam application can divide (FDD) scheme according to temporal partitioning (TDD) scheme or frequency domain and use Wave beam forming, and transmission equipment side can change the direction of wave beam in each special time unit (such as, each subframe).In TDD scheme, BS can configure beam pattern and make wave beam be transferred to zones of different in community in each time interval, or makes wave beam not be transferred to the region of the small cell existed in macrocell.Or when using FDD scheme, the direction of the beam pattern of BS transmission can be depended on frequency subsets (such as, subband Wave beam forming (wave beam or beam pattern)) and change.
When using same carrier wave in multiple community, the particular beam pattern based on macrocell definition can change or rotation, to reduce the interference effect between multiple community with specific period.Such as, with reference in macrocell, when the direction of sequentially rotation wave beam, can by independently offset applications to be determined the direction of wave beam to other macrocells of use same carrier wave.In another example, can according to specific pattern (such as, such as, with the interval of specific period, 10ms) for beam direction be selected in each community.
When transmitting carrier wave, when performing that BS changes beam direction while Wave beam forming, BS can by the information transmission that is associated with beam pattern to UE.
In order to from UE receive channel metrical information, BS can use this wave beam to control with the interval of specific period.Namely, BS can perform wave beam rotation as above and/or control when needs receive from UE the information be associated with channel measurement, but not always perform wave beam rotation and/or control, and this operation for particular UE can be performed, to provide service to this particular UE at other times by the wave beam applied specific to 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 multiple UE broadcast carrier operation information, and this carrier operation information comprises the information be associated with weighing vector collection, and this weighing vector collection comprises one or more weighing vectors (S701) that can be applied to transmitting antenna respectively.Different from this process, the carrier operation information comprising weighing vector collection information can be preset in BS and/or UE.
Determine by be used for subcarrier Wave beam forming before, BS can use higher level or L1/L2 signaling to carry out broadcast carrier operation information by the main carrier that can arrive all regions in cell area, this carrier operation information comprises the information be associated with the weighing vector collection that can be used in Wave beam forming.By receiving the feedback information for broadcast carrier operation information, BS can determine how sub-carrier implements Wave beam forming.
After receiving carrier operation information, based on the beam pattern information be included in carrier operation information, each UE can receive the DL signal (S702) by various corresponding transmission channel.
UE can measure channel status based on using the carrier wave of corresponding weighing vector transmission, and subsequently can by the transmission of feedback information that is associated with this measurement result to BS (S703).This feedback information not only can comprise channel quality information (CQI) and pre-coding matrix index (PMI) and also comprise the weighing vector of the best reception state meeting UE, the information be associated with the weighing vector that UE can read, all if be used for obtaining the temporal information of the sub-frame/frame of weighing vector, the information be associated with frequency band, the information etc. that is associated with the resource used.
After receiving feedback message, based on feedback information, BS can determine carrier operation scheme (S704) by concentrating from weighing vector the particular weights vector information determining this UE.Specifically, BS can determine based on feedback information the beam pattern being suitable for transferring signals to UE, and determines the scheme of beam pattern for this UE.That is, BS can determine beam pattern being transferred to the weighing vector that UE is positioned at the region of community.
The Wave beam forming operation information determined for UE can be transferred to UE (S705) by clean culture by BS subsequently, and uses the Wave beam forming scheme transmission subcarrier (S706) determined.
That is, according to embodiments of the invention, BS can by identical carrier operation information broadcasting to all UE being arranged in community, and different beam pattern information can be transferred to each UE by BS after reception feedback message.Beam pattern information can depend on the position of coverage and/or UE and change.
Herein, when supposing random (half is random) Wave beam forming, UE can by obtaining in subcarrier measurement and will being transferred to the feedback information of BS.Wave beam forming configuration information (comprising the information be associated with time/frequency subband/beam weight vector information) UE indicated by BS can perform the measurement of particular beam.As the measurement result of particular beam, whether UE can be applicable to the information of UE to the configuration of the simple report expression wave beam of BS by comprising the designator of or ON/OFF scheme.In this case, BS can use this ON/OFF information to select part cell coverage information and statistical information for effectively using the Wave beam forming weighting that can often use.
3) for subcarrier operation community or BS between communication
According to embodiments of the invention, BS needs to perform community adjustment (or Wave beam forming arrive adjustment of coverage), the effect of presence of intercell interference during to be minimized in the Wave beam forming performing subcarrier.In definition Wave beam forming (or weighing vector for Wave beam forming of the Equivalent definitions) coverage that arrives to before performing the adjustment of this community, need to share interfere information between the community participating in communication.
When small cell, although may use or may not use the Wave beam forming of subcarrier, need the interfere information obtained from neighbor cell for subcarrier or main carrier.When UE has used carrier wave to perform the measurement of beam direction and/or interference, UE can to Serving cell report channel measurements or PMI information.Or the BS of Serving cell can perform the channel measurement of the UL signal from UE transmission in inside, to obtain the information of presence of intercell interference.Channel measurement can be performed based on the cell special reference of independent precoding (RS) that do not have by each sub-frame transmission, or channel measurement can be performed based on the RS of precoding.
On the other hand, when subcarrier is used for interferometry, a beam collection can be selected according to the Wave beam forming configuration information of being specified based on channel measurement information by BS (cycle, subband, weighing vector etc.) from the beam collection that can be defined as frequency band or subframe.
In channel measurement information item, need to the corresponding unacceptable Wave beam forming of transmission cell report.Herein, when reporting multiple channel measurement, also need to report and the information that the corresponding measure setup of such as wireless frame information, sub-frame information or sub-band information is associated simultaneously.
4) subcarrier is arranged
According to another embodiment of the present invention, when macrocell and small cell use same carrier wave, the usage space scheme of mourning in silence can not configure the subcarrier or network facet [s1] special carrier that use community or cell set special carrier.Therefore, when performing switching or initial cell access, UE does not need the subcarrier except to the subcarrier except specifying for this UE to perform channel measurement.
In heterogeneous network system, in macrocell, preset the great quantity of small community that can use system aspects [s2] available carrier wave.But the carrier wave of small cell transmission may be subject to the impact of the position of small cell or the operation scheme of macrocell.Therefore, by the negotiation between such as adjacent macrocell and the related cell of small cell, the subcarrier shared community can be performed and arrange.After subcarrier is consulted, the interference of subcarrier that small cell can be shared to macrocell report or channel quality and/or channel information, and subsequently after receiving report message macrocell can implement can the Wave beam forming of minimise interference effect.
5) staged operation
Lte-a system can support the carrier wave forming LTE band or LTE-A band.Therefore, it is possible to use LTE band with traditional mode and traditional compatibility mode, and LTE-A band can be used in extra LTE-A optimization.This broadcast type can be distinguished in time and frequency zone in fig. 8.
Fig. 8 show according to an embodiment of the invention for carrier transmission time-frequency resource area.
As shown in Figure 8, specific region is in a frequency domain for transferring signals to all UE and can be used in transmitting non-beamforming band or the subband 801 of main carrier.Non-beamforming band 801 can be distinguished with Wave beam forming band or master tape 802, and Wave beam forming band or master tape 802 are the subbands that can be used in being transferred to by the subcarrier of Wave beam forming according to embodiments of the invention particular UE.
In the structure shown here, can be mourned in silence in space to be according to an embodiment of the invention defined as and be different from conventional carrier and mourn in silence.Such as, conventional carrier mourn in silence be limited to LTE-A band part subband or LTE band part band, make in limited band, use carrier transmission ON/OFF scheme.When small cell operates, this allows small cell to be used as carrier wave by the subband of mourning in silence.That is, not by the center of the central dispense of the carrier wave of generation to macrocell carrier wave.But small cell can realize low interference level, and not by the interference effect of mourning in silence in subband of the neighbor cell from cooperation.
Subband of mourning in silence can be set more neatly.When non-silence subband is still in whole cell area during service UE, part or whole bandwidth can be mourn in silence in space.Subband of mourning in silence also can weaken the operation of [s3] non-silence subband.
When using that mourn in silence in space according to an embodiment of the invention, only Wave beam forming weighing vector can be supported to the target sub-band of having mourned in silence.Wave beam forming weighing vector can be changed in time domain in fig. 8 or frequency domain.When subband spatial is mourned in silence, LTE subband and LTE-A subband (or subband of other types) may be used for subband of mourning in silence.When control channel is mourned in silence, it can be the new operation of non-silence subband definition.Such as, when being used for the License Info of down link or up link by particular sub-band transmission, subband can be mourned in silence in specific environment.Subsequently, the control channel that License Info transmits can be switched to another subband of not yet mourning in silence.This shows that extra control channel can be defined for and can be used for managing space and to mourn in silence the space control channel of mourning in silence of subband (ON/OFF of such as, mourning in silence, weighing vector change the License Info etc. of information, subband of mourning in silence).
6) subchannel of reference channel is used to measure
Can mourn in silence with space according to an embodiment of the invention and use various channel measuring method explicitly.When mourning in silence and non-silence subband/subframe is not included in the carrier wave of UE reception, especially, when non-silence can not be carried out to be measured, directly channel measurement can be performed according to applying the subcarrier of mourning in silence.When based on when such as known symbol that is leading or reference signal (RS) performs channel measurement, the respective channels that comprises this known symbol can be there is and can be shared by multiple small cell and macrocell.Known symbol can be shared in advance between BS.Or, (namely UE can receive the information of any BS transmission in many ways, multiple community can be searched for and receive information from community or be connected to these communities), and subsequently can by Serving cell or the metrical information by these symbols of UE service-specific cell transmission.
Mourn in silence method in space according to an embodiment of the invention, when also performing Wave beam forming to RS, can prevent forming in the region of (wave beam or beam pattern) at transmission beam the multiple UE existed and measuring the subcarrier having experienced path loss.This is because when there is path loss in the subcarrier transmitted by Wave beam forming, the precision according to the path loss of the shape measure of wave beam reduces.Therefore, according to the information that the BS of the embodiment of the present invention can notify UE and the rank (or sequence) of Wave beam forming or be associated for the antenna amount that subcarrier transmits, accurately to measure the subcarrier that experienced by path loss.
After this information of reception, each UE can perform the measurement of suitable subcarrier.Such as, at cell common reference signal (CRS) for channel measurement, and under the CRS of the small cell transmission when not having Wave beam forming causes high-caliber interference to be situation to neighbor cell, BS also can perform Wave beam forming to CRS.That is, BS can define the Wave beam forming for CRS according to an embodiment of the invention, the interference caused to prevent CRS.
Herein, the UE of received beam formation information can perform channel measurement according to each Wave beam forming weighing vector, or can perform channel measurement based on the unit of such as subframe or subband.But, may not UE be there is in the region, sub cell performing Wave beam forming, and therefore be preferably, according to subframe or frequency subband, various weighing vector is applied to CRS.In this case, the measured value of CRS can be converted to the value of subframe index based on correspondence or frequency band by UE, then, and can using the value of this conversion as corresponding to or being reported to BS independent of the subframe index of the measured value of CRS or frequency band.This allows BS to determine how application of beam forms weighing vector to change transmission for providing the cell area of the carrier wave of service to UE according to pre-defined rule.When UE measures subcarrier, similar with the RS specified, BS can change Wave beam forming weighing vector according to subframe or frequency subband.
When there is path loss when transmitting subcarrier, the precision of the path loss of measurement may reduce.But if the rank of Wave beam forming are not enough high, so the amount of beam gain is inessential, after the amount of general path loss metrical error is increased to the amount of about beam gain fully, the amount of beam gain can be ignored when calculating path loss.
7) carrier aggregation of the check and correction of mourning in silence from space
When subcarrier is used as the extra traffic carrier wave for single UE, subcarrier can be represented as the UE special carrier received for DL.But, because subcarrier can be managed under non-snoop state, so by subcarrier, the Wave beam forming weighting being applicable to directly being transferred to the signal of UE can not be estimated.
Therefore, although subcarrier is as general carrier processing, and BS can operate based on carrier aggregation control UE, and the another kind of operation scheme of the Operation Definition based on subcarrier is more effective.Such as, when UE determined suitable beam weighting in advance by channel measurement and the weighting of BS switching-beam for controlling carrier transmission region time, formed and add temporary UE when not applying UE dedicated beams and do not receive subcarrier, or temporary receive subcarrier when application UE dedicated beams is formed to add.
In order to realize this operation, BS needs to be transmitted by system information or UE dedicated radio resources control (RRC) signaling to transmit with subcarrier the information be associated, the time/frequency subband of such as Wave beam forming weighted sum Wave beam forming weighting.In the step S602 of Fig. 6, can transmit together with beam pattern information with the information that subcarrier transmission information is associated, or transmit together with Wave beam forming operation information in the step S705 of Fig. 7.The information be associated with subcarrier transmission information can comprise following at least one: for transmitting Wave beam forming pattern, weighting matrix information, the antenna configuration information of bandwidth, the such as size of each subband and/or the rotational cycle of weighing vector of subcarrier, and measures the method for Received signal strength of subcarrier.
Therefore, BS can based on the feedback Detection Information determination carrier aggregation transmitted from UE.When UE can with enough high-caliber signal strength detection subcarrier time, subcarrier and main carrier can be polymerized.Otherwise, because may not UE be there is in corresponding subcarrier transmission region, so not to UE allocation of subcarriers.
8) control and data channel is used by subchannel
BS can based on the feedback information adjustment control channel transmitted from UE.
Usually, need to add extra signaling procedure and receive subcarrier, due to UE decode control channels from each control channel can not be guaranteed to allow UE.
For realizing this point, according to embodiments of the invention, the information transmission method of the time/frequency with decoded sub-band be associated is to UE.When UE has received the information be associated with coding/decoding method, UE may be received in towards the subframe transmitted after the direction wave beam shaping of UE present position, and to its decoding.But, because use high-level signaling can define time or the frequency decoding setting of subband, so can not initiatively change decoding method to set up by main carrier (or the carrier wave in whole region).
Therefore, in the method for usage space quiet transmission signal according to an embodiment of the invention, after the beam pattern information transmitting step of Fig. 6 or the carrier operation information transmission step of Fig. 7, BS can perform the step of the transmission information be associated with coding/decoding method, to allow to arrange with decoding the dynamic dispatching be associated in any subframe.The schedule information that the control channel for transmitting subcarrier is associated can be transmitted by main carrier.Schedule information only can comprise the indication information of scheduling or the License Info of subcarrier that indicate whether to perform subcarrier.
Herein, when schedule information only comprise about mark whether perform the indication information of the scheduling of subcarrier time, UE need from subcarrier decoding License Info.Herein, by comprising the indication information of the various parameters that such as transmission mode, antenna configuration, polymerization rank, search volume index and frequency subband are associated with decoded positions, the complexity of decoding can be reduced.
To be dispatched by higher level or L1/L2 Control and Schedule predefine can be included in one or more parameters in indication information.When transmission permission information direct by main carrier, License Info can comprise the carrier identification (ID) of subcarrier.Carrier wave ID can be defined based on the subcarrier or all available carrier wave that can be used in each UE.
As mentioned above, be different from embodiments of the invention, can be used in the method for opening/closing stream in the spatial domain (such as: unique Wave beam forming region) of independent environment, independent environment is not the physical space of the cell area such as it being used to Wave beam forming yet.
The method of mourning in silence of space according to another embodiment of the present invention uses transmission ON/OFF scheme in the spatial domain, especially uses layer ON/OFF scheme.
BS can use transmission ON/OFF scheme in the spatial domain, to reduce the interference between macrocell.Transmit in the illustrative methods of information be associated with this space method of mourning in silence at one, open or close the information be associated with layer and can be dispatched (such as, in the form of a bitmap) by RRC and be transferred to UE.Such as, when 12 physical antennas are positioned at a macrocell, 12 physical antennas can be used to configure 3 spatial domains.That is, by for each spatial domain transmission ON/OFF scheme, the specific region transferred signals in community can be determined whether.Herein, Signal transmissions in each spatial domain in one cell can be indicated to open or close by the bitmap of 3.
, ON/OFF method can be used for spatial domain herein, in the method, use pseudo-random patterns to select arbitrarily to perform it spatial domain of on/off operation.
Describing BS and UE hereinafter with reference to Fig. 9, can embodiments of the invention implemented by this BS and UE.
Fig. 9 is the block diagram of BS and UE, can implement embodiments of the invention by this BS and UE.
UE can be operating as transmission equipment in the uplink and be operating as receiving equipment in the downlink.BS can be operating as receiving equipment in the uplink and can be operating as transmission equipment in the downlink.That is, each UE and BS can comprise for transmitting and the transmission equipment of reception information or data and receiving equipment.
Transmission equipment and receiving equipment can comprise processor, module, part and/or device for implementing embodiments of the invention.Specifically, each transmission equipment and receiving equipment can comprise for encrypting messages module (device), for analyze encrypted message module, for transmitting and the antenna etc. of receipt message.
The left side of Fig. 9 shows the structure of the transmission equipment of BS, and right side shows the structure of the receiving equipment of the UE of the community entering 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 from external reception wireless signal and conveys the received signals to receiver module 910 and 920, and the Signal transmissions that transmitting antenna is used for transport module 950 and 960 to generate is to outside.Two or more antennas 901 and 902 can be provided when supporting multiple antennas (MIMO) function.
Receiver module 910 and 920 can perform decoding and demodulation to by antenna from the wireless signal of external reception, with by this signals revivification for initial data, and this initial data can be sent to processor 930 and 940.Receiver module and antenna can be embodied as the integrated receiving element for receiving wireless signal but not be embodied as module independent as shown in Figure 9.
The integrated operation of the usual controls transfer equipment of processor 930 and 940 or receiving equipment.Specifically, processor 930 and 940 can perform the controller function of the embodiment for performing the invention described above, the function performing the variable control of medium access control (MAC) frame according to service characteristic and wireless environment, handoff functionality, certification and encryption function etc.
Transport module 950 and 960 can have been dispatched for processor 930 and 940 will be transferred to outside data execution predictive encoding and modulation, and this result data can be sent to antenna subsequently.Transport module and antenna also may be embodied as the integrated transmission unit for transmitting wireless signals but not are embodied as module independent as shown in Figure 9.
Memory 970 and 980 can store the program for being processed by processor 930 and 940 and controlled, and also can temporarily store input/output data item.When UE, the input/output data item temporarily stored comprises UL license, system information, status identifier (STID), flow identifier (FID), operating time etc.
Memory 970 and 980 can comprise the storage medium of following at least one: flash type, hard disk type, multimedia card are miniature, Card Type (such as, SD or XD memory), random access memory (RAM), static RAM (SRAM), read-only memory (ROM), EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM), programmable read only memory (PROM), magnetic memory, disk and light etc.
According to above with reference to the embodiments of the invention described by figure 5, the processor 930 of transmission equipment can perform the overall control operation of BS, and can executive control operation with the macrocell area usage space quiet transmission subcarrier supporting it to serve at BS.Such as, when such as above-described embodiment sub-carrier performs Wave beam forming, the method according to pre-defined rule change or rotation beam direction can be used.
In order to realize this point, if by transport module 950 by the information transmission that is associated with the weighing vector collection that can use in transmission equipment to receiving equipment, so the processor 940 of receiving equipment can using the channel measurement that is associated with each weighing vector as transmission of feedback information to transmission equipment.That is, the processor 930 of transmission equipment can determine based on the feedback information received when to during receiving equipment transmission carrier wave by by the weighing vector used, and determined weighing vector execution Wave beam forming can be used.
In this process, the embodiment that the processor 930 of transmission equipment not only can perform above-mentioned Fig. 6 or Fig. 8 also can perform above-mentioned steps 1) and 8) process.
The processor 940 of receiving equipment can perform the overall control operation of UE.According to above-described embodiments of the invention, by transport module 920, to use and mourn in silence the information be associated in the space of transmitting from transmission equipment, processor 940 can reception carrier operation information (information be associated with the scheme based on Wave beam forming), and the information of this reception can be used with reception carrier.
Processor 930 and 940 can be configured to can non-usage DM-RS transmits each control information item in above-described embodiments of the invention by independent (or extra) scheduling.BS also can perform by least one module above-mentioned the controlling functions implementing embodiments of the invention, OFDM (OFDMA) packet scheduling, time division duplex (TDD) packet scheduling and channel multiplexing function, the function of the variable control of mac frame is performed according to service characteristic and wireless environment, high speed business Real Time Control Function, handoff functionality, certification and encryption function, for the grouping modulation/demodulation function of transfer of data, high speed packet channel encoding function, modulated in real time demodulator controlling functions etc.Or BS can also comprise independent device, module or the parts for performing these functions.
Give the detailed description of exemplary embodiment of the present invention, make those skilled in the art can implement and operate the present invention.Although reference example embodiment describes the present invention, it is apparent to those skilled in the art that when not departing from the spirit and scope of the present invention described in claims, various modifications and variations can be made to the present invention.Such as, those skilled in the art can combine the structure described in above-described embodiment in every way.
Therefore, the present invention should not be limited to specific embodiment described here, and should meet the widest range consistent with principle disclosed herein and novel feature.
Industrial applicibility
Embodiments of the invention can be applied to various wireless access system.Such as, not only embodiments of the invention can be applied to third generation partner program (3GPP) system, 3GPP2 system and/or institute of Electrical and Electronic Engineers (IEEE) 802.xx system, also can be applied to the various technical fields can applying various wireless access system.

Claims (14)

1. a method for base stations in heterogeneous network signal transmission, described method comprises:
By the down link signal that carried by main carrier by the information be associated with weighing vector collection and the information transmission that is associated with time/frequency resource to multiple subscriber equipment, described weighing vector collection comprises one or more available weights vectors that can be applied to the down link signal carried by subcarrier, and the weighing vector being included in weighing vector concentrated is applied to time/frequency resource;
Transmission has applied it concentrates the down link signal of each weighing vector comprised to described multiple subscriber equipment at described weighing vector;
The feedback information comprising the result of the channel measurement using described subcarrier is received from described multiple subscriber equipment; And
Based on described feedback information, determine the weighing vector of the beam pattern formed being applied to the down link signal carried by described subcarrier to determine the carrier operation scheme on subcarrier, wherein, the described weighing vector determined each is each specific to multiple subscriber equipment;
Each to multiple subscriber equipment of the information that is associated with the described weighing vector determined is transmitted by main carrier; And
Each to multiple subscriber equipment of the down link signal using the described weighing vector determined to transmit to be carried by described subcarrier.
2. method according to claim 1, wherein, described subcarrier and described main carrier are the carrier waves of the different frequency range transmission in the multiple frequency ranges by forming available system band.
3. method according to claim 1, wherein, when the carrier wave that the macrocell supported by described base station uses is overlapping with the carrier wave that the small cell that described macrocell comprises uses, optionally performs the determination of described weighing vector.
4. method according to claim 1, comprises further:
From multiple subscriber equipment receiving feedback information, described feedback information comprise be associated with channel measurement disturb with between multiple community the interfere information be associated; And
In macrocell, transmit the region of the described subcarrier after beam forming based on described interfere information adjustment, the service of described macrocell is supported by described base station.
5. method according to claim 1, comprises further:
Determine the weighing vector of the Wave beam forming formed being applied to reference signal;
Transmission of reference signals operation information, described reference signal operation information comprise the information be associated with by the rank of the Wave beam forming being applied to described reference signal and the information be associated with antenna amount one of at least; And
Transmission has performed the described reference signal of Wave beam forming to it.
6. method according to claim 5, wherein, determine being formed and the described weighing vector of the described Wave beam forming being applied to described reference signal is comprised: according to each of multiple frequency ranges forming available system band, determine described weighing vector, make different weighing vectors be applied to cell common reference signal.
7. the method for subscriber equipment Received signal strength in heterogeneous network, described method comprises:
The information be associated with weighing vector collection and the information be associated with time/frequency resource is received from base station by the down link signal carried by main carrier, described weighing vector collection comprises one or more available weights vectors that can be applied to the down link signal carried by subcarrier, and the weighing vector being included in weighing vector concentrated is applied to time/frequency resource;
Receive from described base station and the down link signal concentrating each weighing vector comprised at weighing vector is applied to it;
To described base-station transmission feedback information, described feedback information comprises the result of the channel measurement using described subcarrier;
Received the information be associated with the weighing vector determined based on described feedback information from base station by described main carrier, wherein, the described weighing vector determined is specific to described subscriber equipment; And
Receive from described base station to the down link signal carried by described subcarrier of the described weighing vector determined of its application, and receive the described subcarrier of the carrier aggregation determined based on described feedback information.
8. method according to claim 7, comprises further:
The down link signal received from described base station is used to perform channel measurement;
To described base-station transmission feedback information, described feedback information comprises the interfere information be associated with the interference between multiple community be associated with described channel measurement.
9. method according to claim 7, wherein, described subcarrier and described main carrier are the carrier waves of the different band transmissions in the multiple frequency ranges by forming available system band.
10. the base station in heterogeneous network, described base station comprises:
Transport module, described transport module is used for transmitting wireless signals;
Receiver module, described receiver module is for receiving wireless signal; And
Processor, described processor is configured to control described transport module and receiver module: by the down link signal that carried by main carrier by the information be associated with weighing vector collection and the information transmission that is associated with time/frequency resource to multiple subscriber equipment, described weighing vector collection comprises one or more available weights vectors that can be applied to the down link signal carried by subcarrier, and the weighing vector being included in weighing vector concentrated is applied to time/frequency resource; Transmission has applied it concentrates the down link signal of each weighing vector comprised to described multiple subscriber equipment at described weighing vector; The feedback information comprising the result of the channel measurement using described subcarrier is received from described multiple subscriber equipment; Based on described feedback information, determine forming the weighing vector of beam pattern that will be applied to the down link signal carried by described subcarrier, the wherein said weighing vector determined each is each specific to multiple subscriber equipment; Use main carrier by each to multiple subscriber equipment of the information transmission that is associated with the described weighing vector determined; Use the carrier aggregation that described feedback information is determined based on subcarrier; And each to multiple subscriber equipment of the down link signal using the described weighing vector determined to transmit to be carried by described subcarrier.
Subscriber equipment in 11. 1 kinds of heterogeneous networks, described subscriber equipment comprises:
Receiver module, described receiver module is for receiving wireless signal;
Transport module, described transport module is used for transmitting wireless signals; And
Processor, described processor is configured to control described transport module and receiver module: receive the information be associated with weighing vector collection and the information be associated with time/frequency resource by the down link signal carried by main carrier from base station, described weighing vector collection comprises one or more available weights vectors that can be applied to the down link signal carried by subcarrier, and the weighing vector being included in weighing vector concentrated is applied to time/frequency resource; Receive from described base station and the down link signal concentrating each weighing vector comprised at weighing vector is applied to it; To described base-station transmission feedback information, described feedback information comprises the result of the channel measurement using described subcarrier; Use main carrier to receive the information be associated with the weighing vector determined based on described feedback information from base station, the wherein said weighing vector determined is specific to described subscriber equipment; And receive to the down link signal carried by described subcarrier of the described weighing vector determined of its application from described base station, and receive the described subcarrier of the carrier aggregation determined based on described feedback information.
12. subscriber equipmenies according to claim 11, wherein, when described subscriber equipment uses described main carrier to receive the information be associated with the weighing vector collection comprising one or more available weights vectors that can be applied to described subcarrier from described base station by described receiver module, and receive subsequently and apply when described weighing vector concentrates the down link signal of each weighing vector comprised to it, described processor performs and applies to it channel measurement concentrating the described down link signal of each weighing vector comprised at described weighing vector, and generate the feedback information be associated with the result of described channel measurement, and by described transport module by described transmission of feedback information to described base station.
13. subscriber equipmenies according to claim 12, wherein, described feedback information comprises the interfere information be associated with the interference between multiple community be associated with described channel measurement.
14. subscriber equipmenies according to claim 11, wherein, when described subscriber equipment by described receiver module to receive from described base station for the formation of the weighing vector of the Wave beam forming by being applied to described subcarrier and be associated with the time/frequency resource forming weighting to its application of beam information time, described processor generates the feedback information comprising the result of the channel measurement using described subcarrier, and by described transport module by described transmission of feedback information to described base station.
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