CN105939187A - Sounding reference signal enhancement method under unlicensed spectrum and related equipment - Google Patents

Sounding reference signal enhancement method under unlicensed spectrum and related equipment Download PDF

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Publication number
CN105939187A
CN105939187A CN201610387768.8A CN201610387768A CN105939187A CN 105939187 A CN105939187 A CN 105939187A CN 201610387768 A CN201610387768 A CN 201610387768A CN 105939187 A CN105939187 A CN 105939187A
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China
Prior art keywords
srs
base station
blank subframe
subframe
configuration information
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CN201610387768.8A
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朱广勇
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Shenzhen Jinli Communication Equipment Co Ltd
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Shenzhen Jinli Communication Equipment Co Ltd
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Priority to CN201610387768.8A priority Critical patent/CN105939187A/en
Publication of CN105939187A publication Critical patent/CN105939187A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource
    • H04W72/0453Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource the resource being a frequency, carrier or frequency band

Abstract

The embodiment of the invention discloses a sounding reference signal enhancement method under an unlicensed spectrum and related equipment. The method may comprise the step of detecting whether a target channel is in an idle state or not on a blank sub-frame after UE receives SRS (sounding reference signal) configuration information sent by a base station; and reporting an SRS to the base station according to the SRS configuration information if the target channel is in the idle state, thereby enabling the base station to carry out channel estimation on the target channel according to the SRS, wherein the SRS configuration information is used for indicating that the UE reports the SRS to the base station in a preset symbol of a preset sub-frame, and the SRS configuration information comprises an SRS transmission mode and an SRS transmission position of the UE. Through adoption of the mode, the problem that on the unlicensed spectrum, when the UE transmitting PUSCH (Physical Uplink Shared Channel) data in a certain spectrum resource is different from the UE reporting the SRS, the UE reporting the SRS delays report of the SRS or event cannot report the SRS due to the fact that the channel is busy can be solved.

Description

Under a kind of unlicensed spectrum detection reference signal strengthen method and relevant device
Technical field
The present invention relates to communication technical field, be specifically related to detection reference signal under a kind of unlicensed spectrum and strengthen Method and relevant device.
Background technology
Along with sharply increasing of message volume, authorize frequency spectrum to seem and be increasingly not enough to provide higher network Capacity.Therefore, third generation partner program (3rd Generation Partnership Project, 3GPP) Introduce the concept authorizing frequency spectrum auxiliary to access (Licensed Assisted Access, LAA), i.e. do not awarding Power frequency spectrum uses long-term artistic skills (Long Term Evolution, LTE) network technology, based on carrier aggregation Framework, by authorize frequency range carrier wave as main plot, unlicensed spectrum carrier wave is only as secondary cell.In order to Avoiding clashing between the equipment worked on unlicensed spectrum, LTE network have employed listem-before-talk (Listen Before Talk, LBT) channel competition access mechanism, i.e. user terminal (User Equipment, UE) Unlicensed spectrum only detecting, channel is in idle condition and just can take this channel.
In the lte networks, UE is carrying out Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) detection reference signal (Sounding Reference can be reported to base station before data transmission Signal, SRS), in order to base station uses SRS to assess uplink signal-channel quality.On unlicensed spectrum, A certain UE can carry out LBT detection before reporting SRS in the previous subframe of transmission SRS, as There are other UE and carry out data transmission in fruit, this UE will detect that channel is in busy condition, so can This UE carries out SRS and reports and will postpone, and even cannot be carried out SRS and reports.
Summary of the invention
The embodiment of the invention discloses method that detection reference signal under a kind of unlicensed spectrum strengthens and relevant set Standby, UE can be solved on unlicensed spectrum because detecting that channel busy occurs that SRS reports delay even cannot go up The problem reporting SRS.
Embodiment of the present invention first aspect discloses a kind of method that under unlicensed spectrum, SRS strengthens, the method May include that
User terminal UE receives the SRS configuration information that base station sends, and described SRS configuration information is used for indicating Described UE reports SRS, described SRS configuration information bag in the predetermined symbol of default subframe to described base station Include the SRS transmission pattern of described UE and the SRS transmission position of described UE;
Described UE detects whether destination channel is in idle condition in blank subframe, and wherein, described target is believed Road is positioned at unlicensed spectrum;
In the case of described destination channel is in idle condition, described UE is according to described SRS transmission pattern Described SRS transmission position reports SRS to described base station so that described base station according to described SRS to institute State destination channel and carry out channel estimation.
Embodiment of the present invention second aspect discloses the method that under another kind of unlicensed spectrum, SRS strengthens, the party Method may include that
Base station sends SRS configuration information, and described SRS configuration information is for indicating the UE accessing described base station Report SRS in the predetermined symbol of default subframe to described base station, described SRS configuration information includes described UE SRS transmission pattern and the SRS transmission position of described UE;
Described base station receives described UE and detects that in blank subframe destination channel is in the situation of idle condition Under the SRS that reports on described SRS transmission position according to described SRS transmission pattern, wherein, described target Channel is positioned at unlicensed spectrum;
Described base station carries out channel estimation according to described SRS to described destination channel.
The embodiment of the present invention third aspect discloses a kind of UE, and this base station may include that
Receiving unit, receive the SRS configuration information that base station sends, described SRS configuration information is used for indicating institute Stating UE and report SRS in the predetermined symbol of default subframe to described base station, described SRS configuration information includes The SRS transmission pattern of described UE and the SRS transmission position of described UE;
Detector unit, for detecting whether destination channel is in idle condition in blank subframe, wherein, institute State destination channel and be positioned at unlicensed spectrum;
Transmitting element, in the case of described destination channel is in idle condition, passes according to described SRS Defeated pattern reports SRS to described base station on described SRS transmission position, so that described base station is according to described SRS Described destination channel is carried out channel estimation.
Embodiment of the present invention fourth aspect discloses a kind of base station, and this UE includes:
Transmitting element, is used for sending SRS configuration information, and described SRS configuration information is used for indicating access described The UE of base station reports SRS, described SRS configuration information in the predetermined symbol of default subframe to described base station SRS transmission pattern and the SRS transmission position of described UE including described UE;
Receive unit, in blank subframe, detect that destination channel is in idle condition for receiving described UE In the case of the SRS that reports on described SRS transmission position according to described SRS transmission pattern, wherein, described Destination channel is positioned at unlicensed spectrum;
Channel estimating unit, for carrying out channel estimation according to described SRS to described destination channel.
Implement the embodiment of the present invention, have the advantages that
In the embodiment of the present invention, UE, can be first in blank after receiving the SRS configuration information that base station sends Detect whether destination channel is in idle condition in subframe, if destination channel is in idle condition, UE root again SRS is reported to base station according to SRS configuration information, so that base station carries out channel estimation according to SRS to destination channel, Wherein, SRS configuration information is used for indicating this UE to report SRS to base station in the predetermined symbol of default subframe, This SRS configuration information includes SRS transmission pattern and the SRS transmission position of this UE, and blank subframe includes pre- If the previous symbol of predetermined symbol in subframe.Can solve in this way on unlicensed spectrum, when certain During the situation that in one frequency spectrum resource, the transmission of PUSCH data is different with the UE that SRS reports, SRS reports UE is because detecting that channel busy occurs that SRS reports the problem postponing even to report SRS.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow process signal of the method that SRS strengthens under a kind of unlicensed spectrum disclosed in the embodiment of the present invention Figure;
Fig. 2 a is the scene schematic diagram that in prior art, the transmission of PUSCH data is different with the UE that SRS reports;
Fig. 2 b is the field that PUSCH data transmission disclosed in the embodiment of the present invention is different with the UE that SRS reports Scape schematic diagram;
Fig. 3 is that under another kind of unlicensed spectrum disclosed in the embodiment of the present invention, the flow process of the method that SRS strengthens is shown It is intended to;
Fig. 4 is the structural representation of a kind of UE disclosed in the embodiment of the present invention;
Fig. 5 is the structural representation of another kind of UE disclosed in the embodiment of the present invention;
Fig. 6 is the structural representation of a kind of base station disclosed in the embodiment of the present invention;
Fig. 7 is the structural representation of another kind of base station disclosed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
The embodiment of the invention discloses method that detection reference signal under a kind of unlicensed spectrum strengthens and relevant set Standby, UE can be solved on unlicensed spectrum because detecting that channel busy occurs that SRS reports delay even cannot go up The problem reporting SRS.It is described in detail individually below.
Technique described herein may be used for various cordless communication network, such as CDMA ((Code Division Multiple Access, CDMA) network, time division multiple acess (Time Division Multiple Access, TDMA), Frequency division multiple access (Frequency Division Multiple Access, FDMA), OFDM (Orthogonal Division Multiple Access, OFDMA) network, single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) and other network.Art Language " network " and " system " generally exchange use.It is wireless that cdma network can realize such as general land Access (Universal Telecommunication Radio Access, UTRA), telecommunications industry association (Telecommunications Industry Association, TIA) etc wireless technology.UTRA technology Including wideband CDMA (WCDMA) and other modification of CDMA.Technology includes from Electronic Industries Association (Electronic Industries Association, EIA) and IS-2000, IS-95 and IS-856 standard of TIA. TDMA network can realize such as global system for mobile communications (Global System for Mobile Communication, GSM) etc wireless technology.OFDMA system can realize the most evolved UTRA (E-UTRA), Ultra-Mobile Broadband (Ultra Mobile Broadband, UMB), IEEE802.11 (nothing Line fidelity, Wi-Fi), (worldwide interoperability for microwave accesses Worldwide Interoperability for IEEE802.16 Microwave Access, WiMAX), the wireless technology of IEEE802.20, Flash-OFDMA etc. UTRA and E-UTRA technology is a part of Universal Mobile Telecommunications System (UMTS).3GPP Long Term Evolution (Long Term Evolution, LTE) and senior LTE (LTE-A) are to use the UMTS of E-UTRA relatively Redaction.The document of the tissue from entitled " third generation partner program " (3GPP) describes UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM.In call oneself " third generation partner program 2 " (3GPP2) document of tissue describes and UMB.Technology described herein may be used for institute above The wireless network mentioned and wireless access technology, and other wireless network and wireless access technology.In order to clearly Chu Qijian, some aspect of this technology is for LTE or LTE-A (or being generically and collectively referred to as " LTE/-A ") below It is described, and uses this LTE/-A term in following many descriptions.
ENodeB (eNB) can be the station communicated with UE, and is referred to as base station, node B, connects Access point etc..Each eNB can provide communication overlay for specific geographic area.In 3 gpp, term " community " according to use this term context can refer to eNB this specific geographical coverage area and/ Or serve this specific geographical coverage area of the eNB subsystem of this overlay area.
ENB can provide logical for macrocell, picocell, Femto cell and/or other type of community Letter covers.Macrocell generally covers relatively large geographic area (such as, radius is the scope of a few km), and And can allow by the unconfined access of UE of the service signing having with network provider.Picocell is usual Cover relatively small geographic area, and can allow by the UE of the service signing having with network provider Unconfined access.Femto cell generally also covers relatively small geographic area (such as, family), and May be provided in addition to unconfined access by limited the connecing with the UE associated with Femto cell Enter (such as, the UE in closed user group (Closed Subscriber Group, CSG), user in family UE etc.).The eNB of macrocell is referred to alternatively as grand eNB.The eNB of picocell is referred to alternatively as slight eNB. And, the eNB of Femto cell is referred to alternatively as femto eNB or family eNB.
Referring to Fig. 1, Fig. 1 is the side that under a kind of unlicensed spectrum disclosed in the embodiment of the present invention, SRS strengthens The schematic flow sheet of method.Wherein, the method shown in Fig. 1 can apply to certain frequency spectrum resource of unlicensed spectrum In the scene that the transmission of the middle PUSCH of existence data is different with the UE that SRS reports.In this scenario, if The UE that SRS reports detects that channel is in busy state, the most just cannot be carried out SRS and reports.This UE Can continue to detect the state of channel according to the detection cycle, and report when channel is in idle condition detecting SRS, such that the PUSCH data transmission of UE postpones;This UE is likely to follow-up the most right Channel detects, and so just cannot be carried out SRS on unlicensed spectrum and reports.Concrete, such as Fig. 1 institute Showing, the method that under this unlicensed spectrum, SRS strengthens may comprise steps of:
101, UE receives the SRS configuration information that base station sends.
In the embodiment of the present invention, UE can include cell phone, panel computer, palm PC, individual digital Assistant (Personal Digital Assistant, PDA), mobile internet device (Mobile Internet Device, MID), each Terminal Type such as Intelligent worn device (such as intelligent watch, Intelligent bracelet etc.), the embodiment of the present invention It is not construed as limiting.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE, UE The SRS transmission position of SRS transmission pattern and UE.Wherein, SRS transmission pattern may refer to UE be with Which kind of pattern is to base station transmission SRS, and SRS transmission pattern can include frequency division transmission pattern, time division transmission Pattern or code division transmission mode.Transmit in the UE different under frequency division transmission pattern different sub carrier in symbol, Under time-division transmission mode, different UE were transmitted in the different moment, and under code division transmission mode, different UE are at symbol It is transmitted with different orthogonal codes in number.The SRS transmission pattern of different UE can be identical, it is also possible to no With.SRS transmission position may refer to the upper transmission in the UE which position (or which subcarrier) in symbol SRS signal, the SRS transmission position of different UE is different, the i.e. different UE different sons in same symbol Respective SRS signal is transmitted on carrier wave.
In the embodiment of the present invention, high-level signaling or Physical Downlink Control Channel (Physical can be passed through in base station Downlink Control Channel, PDCCH) instruction is to UE configuration SRS configuration information, and pass through wide Broadcast Control channel (Broadcast Control Channel, BCCH) is broadcasted in this community each in units of community The SRS configuration information of individual UE, the UE in this community can receive the SRS configuration information of base station broadcast.
In the embodiment of the present invention, this SRS configuration information is for indicating this UE at the predetermined symbol of default subframe Interior report SRS to base station.In LTE system, each subframe comprises two time slots, and each time slot comprises 7 Individual single-carrier frequency division multiple access (Single-carrier Frequency-Division Multiple Access, SC-FDMA) Symbol (at follow-up abbreviation symbol), last symbol (i.e. the 14th symbol) of each sub-frame of uplink can For the transmission of SRS signal, now, predetermined symbol may refer to preset last symbol of subframe, Be specifically as follows that last symbol of sub-frame of uplink, i.e. base station indicate this UE at a certain sub-frame of uplink is last SRS is transmitted on one symbol.It should be noted that and special subframe includes a uplink pilot time slot (Uplink Pilot Time Slot, UpPTS), this UpPTS comprises two symbols, the two symbol For the transmission of SRS, now, predetermined symbol may refer to any one in the two symbol, i.e. base station Indicate and transmit SRS on this UE symbol in the UpPTS of a certain special subframe simultaneously.
In the embodiment of the present invention, LTE defines the SRS transmission of 2 types: 1) periodically SRS, base Stand and configured by RRC;2) SRS aperiodic, for FDD (Frequency Division Dual, FDD), base station can by Downlink Control Information in PDCCH (Downlink Control Information, DCI) format 0/4/1A triggers UE and sends SRS aperiodic.For time division duplex (Time Division Duplexing, TDD), base station can be by the SRS request word in DCI format 0/4/1A/2B/2C Section triggers UE and sends SRS aperiodic.In carrier aggregation, UE can be simultaneously on different Serving cells Send SRS.One UE can on each Serving cell configuration cycle property SRS and SRS aperiodic. UE, on different Serving cells, can have different SRS configuration informations.
In the embodiment of the present invention, under FDD scene, UE sends the subframe of periodically SRS and need to meet: (10*nf+kSRS-Toffset)modTSRS=0;UE sends the subframe of SRS aperiodic and need to meet: (10*nf+kSRS-Toffset)modTSRS=0.Wherein, nfRepresent System Frame Number, kSRSRepresent the son in each system-frame Frame number, k ∈ 0,1 ... 9}, TSRSThe cycle of SRS, T is reported for UEoffsetThe SRS reported for UE is in week Phase TSRSInterior sub-frame offset.TSRSAnd ToffsetValue is as shown in table one and table two:
Table one: the T that aperiodic, SRS reportedoffsetAnd TSRSValue table
SRS configuration index ISRS SRS cycle TSRS(ms) SRS skew Toffset
0-1 2 ISRS
2-6 5 ISRS-2
7-16 10 ISRS-7
17-31 reserved reserved
Table two: the T that periodically SRS reportsoffsetAnd TSRSValue table
SRS configuration index ISRS SRS cycle TSRS(ms) SRS skew Toffset
0-1 2 ISRS
2-6 5 ISRS-2
7-16 10 ISRS-7
17-36 20 ISRS-17
37-76 40 ISRS-37
77-156 80 ISRS-77
157-316 160 ISRS-157
317-636 320 ISRS-317
637-1023 reserved reserved
It should be noted that the SRS that sends in certain specific sub-frame of UE may with in community other The PUSCH transmission of UE is overlapped on frequency domain, in order to avoid SRS transmission and the PUSCH of different UE Clashing between transmission, all UE should be avoided in last symbol of the subframe that have sent SRS Upper transmission PUSCH.Therefore, all UE in community will be appreciated that and there may be in which sub-frame set UE sends SRS, the most all UE and is just avoided that on last symbol of these subframes transmission PUSCH. Therefore, sub-frame configuration should also be included during base station is sent to the SRS configuration information of UE.
102, UE detects whether destination channel is in idle condition in blank subframe.
In the embodiment of the present invention, UE, first can be in blank after receiving the SRS configuration information that base station sends Destination channel carries out in subframe the measurement of LBT mechanism, i.e. whether detection destination channel is in idle condition. Wherein, destination channel refers to that UE sends the channel shared by SRS.
In prior art, UE reports SRS at last symbol of sub-frame of uplink, then report SRS Needing to detect destination channel, the specifically previous symbol at the symbol reporting SRS is examined before Survey.If other UE are being currently used destination channel transmission PUSCH data, then this UE will examine Measure destination channel and be in busy condition.
Whether be in a kind of exemplary mode of idle condition as detection destination channel, concrete, UE examines Survey and around whether have miscellaneous equipment just to send PUSCH data in destination channel.If this target channel by Miscellaneous equipment takies, and can continue when next listening period arrives to monitor, it is also possible to no longer supervise according to instruction Listen;If it is idle to listen to channel resource, this UE can take this destination channel immediately.Channel holding time is One fixed value, this fixed value be SRS configuration information configuration sub-frame of uplink last symbol time Between length, it is contemplated that UE is reported to the transformation process of Channel Detection at SRS, can detect at subsequent channels A silence period is set before position.Preferably, if it is idle to listen to channel resource, can generate one with Machine number L is as back off time, in this back off time, continues to monitor destination channel, if detecting L time Destination channel is in idle condition, then back off time terminates, and this UE just can take this destination channel and enters simultaneously Row SRS reports.If UE detects that channel status is busy (the most being taken by other UE), then Within this cycle equipment can not busy channel, then this UE can wait until next cycle fixed position continue Detection.
The mode that the another kind of idle condition is exemplary whether it is in as detection destination channel, concrete, when The when that UE needing to report SRS, trigger initial detecting.If UE initial detecting is in the free time to destination channel State, can take this destination channel, and be pre-configured with a Channel holding time T by base station;If at the beginning of UE Begin to detect that destination channel state is busy, then can generate (defer period) time in a postponement cycle, If still detecting that destination channel is done cycle time postponing, then continue to generate one and postpone cycle time. UE can take destination channel after L detection time detecting is the free time to channel status, takies target letter The road time is T.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame does not carries out data transmission for indicating the UE accessing this base station in this blank subframe, then this blank Subframe can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station is permissible Broadcast needs the SRS configuration information sending the UE of SRS when, in SRS configuration information, instruction is blank The position of subframe, accesses the UE of this base station when transmitting PUSCH data, would not take this blank subframe. So UE is before sending SRS, it is possible to destination channel carries out in blank subframe the inspection of LBT mechanism Survey.
As the embodiment that another kind is feasible, this blank subframe can also is that base station is at the UE accessing this base station Configuration in the case of having data transfer demands, this blank subframe has the UE of data transfer demands for instruction This blank subframe does not carries out data transmission, then this blank subframe can include presetting in this default subframe Front M the symbol of symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station is permissible The position of blank subframe is determined, then above-mentioned UE giving the UE Resources allocation having data transfer demands when When transmitting PUSCH data, this blank subframe would not be taken.So UE is before sending SRS, just In blank subframe, destination channel can be carried out the detection of LBT mechanism.
Further, under conventional cyclic prefix (Cyclic Prefix, CP), a subframe includes 14 Symbol, if blank subframe is indicated by SRS configuration information, the length of this blank subframe is less than or equal to one The length of symbol, i.e. 1/14ms, about 71.4us;If blank subframe by base station access this base station UE Having in the case of data transfer demands and configure, M is less than or equal to 13, i.e. the length of blank subframe less than or etc. Length in 13 symbols.Concrete, the length of blank subframe meet as far as possible to UE reserved sufficient time Between destination channel is detected.Under extension CP, a subframe includes 12 symbols, if blank son Frame is indicated by SRS configuration information, and the length of this blank subframe is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank subframe is had data transfer demands by base station at the UE accessing this base station In the case of configure, M is less than or equal to 11, and i.e. the length of blank subframe is less than or equal to the length of 11 symbols. The mode of blank subframe flexible configuration can improve the compatibility on unlicensed spectrum to LTE system.
103, in the case of destination channel is in idle condition, the SRS that UE includes according to SRS configuration information Transmission mode reports SRS to base station on SRS transmission position.
In the embodiment of the present invention, in the case of UE detects that in blank subframe destination channel is in idle condition, Just can report to base station on SRS transmission position according to the SRS transmission pattern that SRS configuration information includes SRS, base station can carry out channel estimation for the SRS that UE reports to destination channel.UE can be periodically Report SRS, it is also possible to aperiodic reports SRS, both can only report SRS on sub-frame of uplink, it is also possible to Transmitting PUSCH with other UE on sub-frame of uplink, the embodiment of the present invention does not limits simultaneously.
As a kind of feasible embodiment, when the SRS transmission pattern of UE is frequency division transmission pattern, i.e. The pilot frequency sequence of multiple UE carries out frequency division according to the mode that transmission comb Comb is N, then SRS transmission position Putting and be frequency domain position, i.e. corresponding for this UE Comb position, wherein N is positive integer.
Accordingly, the SRS transmission pattern that UE includes according to SRS configuration information on SRS transmission position to Base station reports the concrete mode of SRS to be:
UE is according to the transmission mode that Comb is that N carries out frequency division, on corresponding Comb position on base station Report SRS.
Concrete, frequency domain position that UE can be specified by base station in last symbol of sub-frame of uplink to Base station reports SRS.Base station is sent in the SRS configuration information of UE, and the frequency domain position of SRS can pass through " broadband SRS " and " arrowband SRS " realizes.Wherein, for " arrowband SRS ", multiple usually through sending " arrowband SRS ", and frequency hopping on frequency domain, associating SRS obtains band information interested.For " arrowband SRS, and frequency hopping on frequency domain, associating SRS obtains band information interested " situation, SRS transmission Original position on frequency domainExpression formula be:Wherein,Represent SRS The length of reference signal sequence, the frequency domain resource that namely SRS takies on frequency domain is also referred to as Resource Block (Resource Block, RB).Expression formula can be:
Wherein, b=BSRS, i.e. the bandwidth of SRS, mSRSRefer to each SRS RB shared on frequency domain Number,Represent the quantity of Resource Block sub-carriers, expression formula is because " divided by 2 " the reference letter of SRS Number sequence maps every a subcarrier, i.e. " pectination " frequency spectrum causes.
In general sub-frame of uplink, Represent sub-frame of uplink The quantity of middle RB,Value can be 0 or 1.
For example, seeing also Fig. 2 a and Fig. 2 b, Fig. 2 a is PUSCH data transmission in prior art The scene schematic diagram different with the UE that SRS reports, Fig. 2 b is PUSCH number disclosed in the embodiment of the present invention According to the scene schematic diagram that transmission is different with the UE that SRS reports.Multiple UE (UE1, UE2, UE3 and UE4) by the Comb same symbol of structure multiplexing on frequency domain, UE1 is configured in the last of sub-frame of uplink One symbol reports SRS, and in the case of this channel is taken by UE3 and transmits PUSCH data, In prior art, last symbol of the sub-frame of uplink of this channel is used for reporting SRS, remaining symbol UE3 It is used for transmitting PUSCH data, as shown in Figure 2 a;And the up son of this channel in embodiments of the present invention Frame is partly or entirely configured to blank subframe for report the previous symbol of the symbol of SRS, and UE3 is only PUSCH data can be transmitted, as shown in Figure 2 b on the symbol before blank subframe.In this way, UE1, before reporting SRS, just can detect that in blank subframe present channel is in idle condition, this Sample UE1 just can report SRS to base station at last symbol of sub-frame of uplink.
Visible, in the method described by Fig. 1, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill In art, SRS reports the problem postponing even cannot report in these cases.
Referring to Fig. 3, Fig. 3 is that under another kind of unlicensed spectrum disclosed in the embodiment of the present invention, SRS strengthens The schematic flow sheet of method.Wherein, the method shown in Fig. 3 can apply to certain frequency spectrum money of unlicensed spectrum Source exists in the scene that the transmission of PUSCH data is different with the UE that SRS reports.In this scenario, if The UE that SRS reports detects that channel is in busy state, the most just cannot be carried out SRS and reports.This UE Can continue to detect the state of channel according to the detection cycle, and report when channel is in idle condition detecting SRS, such that the PUSCH data transmission of UE postpones;This UE is likely to follow-up the most right Channel detects, and so just cannot be carried out SRS on unlicensed spectrum and reports.Concrete, such as Fig. 3 institute Showing, the method that under this unlicensed spectrum, SRS strengthens may comprise steps of:
301, base station sends SRS configuration information.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE, UE The SRS transmission position of SRS transmission pattern and UE.This SRS configuration information is used for indicating this UE presetting SRS is reported to base station in the predetermined symbol of subframe.In LTE system, each subframe comprises two time slots, Each time slot comprises 7 symbols, and last symbol (i.e. the 14th symbol) of each sub-frame of uplink is permissible For the transmission of SRS signal, now, predetermined symbol may refer to preset last symbol of subframe, tool Body can be that last symbol of sub-frame of uplink, i.e. base station indicate this UE at last of a certain sub-frame of uplink SRS signal is transmitted on individual symbol.It should be noted that and special subframe includes a UpPTS, should UpPTS comprises two symbols, and the two symbol is used equally to the transmission of SRS, and now, predetermined symbol is permissible Refer to that any one in the two symbol, i.e. base station indicate this UE in the UpPTS of a certain special subframe A symbol on transmit SRS simultaneously.
In the embodiment of the present invention, base station can be instructed by high-level signaling or PDCCH and configure SRS to UE Configuration information, and in units of community, the SRS configuration information of each UE in this community is broadcasted by BCCH, UE in this community can receive the SRS configuration information of base station broadcast.
302, base station receive UE detect in blank subframe destination channel be in the case of idle condition by The SRS that the SRS transmission pattern included according to SRS configuration information reports on SRS transmission position.
In the embodiment of the present invention, UE, first can be after according to identifying the SRS configuration information of correspondence Detect whether destination channel is in idle condition, if destination channel is in idle condition, UE in blank subframe SRS is reported to base station further according to configuration information.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame does not carries out data transmission for indicating the UE accessing this base station in this blank subframe, then this blank Subframe can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station is permissible Broadcast needs the SRS configuration information sending the UE of SRS when, in SRS configuration information, instruction is blank The position of subframe, accesses the UE of this base station when transmitting PUSCH data, would not take this blank subframe. So UE is before sending SRS, it is possible to destination channel carries out in blank subframe the inspection of LBT mechanism Survey.
As the embodiment that another kind is feasible, this blank subframe can also is that base station is at the UE accessing this base station Configuration in the case of having data transfer demands, this blank subframe has the UE of data transfer demands for instruction This blank subframe does not carries out data transmission, then this blank subframe can include presetting in this default subframe Front M the symbol of symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station is permissible The position of blank subframe is determined, then above-mentioned UE giving the UE Resources allocation having data transfer demands when When transmitting PUSCH data, this blank subframe would not be taken.So UE is before sending SRS, just In blank subframe, destination channel can be carried out the detection of LBT mechanism.
Further, under conventional CP, a subframe includes 14 symbols, if blank subframe is by SRS Configuration information indicates, the length of this blank subframe less than or equal to the length of a symbol, i.e. 1/14ms, about 71.4us;If blank subframe is configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 13, and i.e. the length of blank subframe is less than or equal to the length of 13 symbols.Concrete, empty Destination channel is detected by the time that the length of white chessman frame meets as far as possible to UE is reserved sufficient.In extension Under CP, a subframe includes 12 symbols, if blank subframe is indicated by SRS configuration information, and this blank The length of subframe is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank subframe Being configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 11, I.e. the length of blank subframe is less than or equal to the length of 11 symbols.The mode of blank subframe flexible configuration is permissible Improve the compatibility to LTE system on unlicensed spectrum.
As a kind of feasible embodiment, when SRS configuration information includes SRS transmission pattern and the SRS of UE During transmission location, if the SRS transmission pattern of UE is frequency division transmission pattern, the pilot tone of the most multiple UE Sequence carries out frequency division according to the mode that Comb is N, then SRS transmission position is frequency domain position, i.e. should Comb position corresponding for UE, wherein N is positive integer.
Accordingly, in the case of reception UE in base station detects that in blank subframe destination channel is in idle condition The SRS's that the SRS transmission pattern included according to SRS configuration information reports on SRS transmission position is concrete Mode is:
Base station receive UE detect in blank subframe destination channel be in the case of idle condition according to Comb is the transmission mode that N carries out frequency division, the SRS reported on corresponding Comb position.
303, base station carries out channel estimation according to this SRS to this destination channel.
In the embodiment of the present invention, the SRS that the UE received for base station reports, it is possible to use preset algorithm pair SRS carries out channel estimation, i.e. the destination channel of UE transmission SRS is carried out channel estimation.Wherein, preset Algorithm can be different according to the difference of SRS transmission pattern, when SRS transmission pattern is frequency division transmission pattern, This preset algorithm can be compressed sensing algorithm;When SRS transmission pattern is code division transmission mode, this is preset Algorithm can be traditional Code Channel algorithm for estimating, such as time-domain filtering etc..
Visible, in the method described by Fig. 3, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill In art, SRS reports the problem postponing even cannot report in these cases.
Referring to Fig. 4, Fig. 4 is the structural representation of a kind of UE disclosed in the embodiment of the present invention, is used for performing The method that under unlicensed spectrum disclosed in the embodiment of the present invention, SRS strengthens.As shown in Figure 4, this UE400 can To include:
Receive unit 401, for receiving the SRS configuration information that base station sends, wherein, SRS configuration information For indicating UE400 to report SRS to base station in the predetermined symbol of default subframe.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE400, UE400 SRS transmission pattern and the SRS transmission position of UE400.
Detector unit 402, for detecting whether destination channel is in idle condition in blank subframe.
A kind of exemplary mode of idle condition whether it is in as detection destination channel, concrete, UE400 Whether detection around has miscellaneous equipment just to send PUSCH data in destination channel.If this target channel is Taken by miscellaneous equipment, can continue when next listening period arrives to monitor, it is also possible to according to instruction no longer Monitor;If it is idle to listen to channel resource, UE400 can take this destination channel immediately.During channel occupancy Between be a fixed value, this fixed value is last symbol of sub-frame of uplink of SRS configuration information configuration Time span, it is contemplated that UE400 is reported to the transformation process of Channel Detection at SRS, can next believe A silence period is set before detection position, road.Preferably, if it is idle to listen to channel resource, can generate One random number L is as back off time, in this back off time, continues to monitor destination channel, if detection Be in idle condition to L destination channel, then back off time terminates, and UE400 just can take this mesh simultaneously Mark channel carries out SRS and reports.If UE400 detects that channel status is busy (the most by other UE takies), then within this cycle equipment can not busy channel, then UE400 can wait until next cycle Fixed position continue detection.
The mode that the another kind of idle condition is exemplary whether it is in as detection destination channel, concrete, when The when that UE400 needing to report SRS, trigger initial detecting.If UE400 initial detecting is at destination channel In idle condition, this destination channel can be taken, and be pre-configured with a Channel holding time T by base station;If UE400 initial detecting is busy to destination channel state, then can generate a postponement cycle (defer period) Time, if still detecting that destination channel is done cycle time postponing, then continue to generate one and postpone the cycle Time.UE400 can take destination channel after L detection time detecting is the free time to channel status, Taking the destination channel time is T.
Transmitting element 403, in the case of destination channel is in idle condition, according to SRS transmission mould Formula reports SRS to base station on SRS transmission position, so that destination channel is entered by base station according to the SRS reported Row channel is estimated.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame does not carries out data transmission for indicating the UE accessing this base station in this blank subframe, then this blank Subframe can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station is permissible In SRS configuration information, indicate the position of blank subframe when broadcasting the SRS configuration information of this UE400, connect Enter the UE of this base station when transmitting PUSCH data, this blank subframe would not be taken.So UE400 Before sending SRS, it is possible in blank subframe, destination channel is carried out the detection of LBT mechanism.
As the embodiment that another kind is feasible, this blank subframe can also is that base station is at the UE accessing this base station Configuration in the case of having data transfer demands, this blank subframe has the UE of data transfer demands for instruction This blank subframe does not carries out data transmission, then this blank subframe can include presetting in this default subframe Front M the symbol of symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station is permissible The position of blank subframe is determined, then above-mentioned UE giving the UE Resources allocation having data transfer demands when When transmitting PUSCH data, this blank subframe would not be taken.So UE400 is sending before SRS, Just in blank subframe, destination channel can be carried out the detection of LBT mechanism.
Further, under conventional CP, a subframe includes 14 symbols, if blank subframe is by SRS Configuration information indicates, the length of this blank subframe less than or equal to the length of a symbol, i.e. 1/14ms, about 71.4us;If blank subframe is configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 13, and i.e. the length of blank subframe is less than or equal to the length of 13 symbols.Concrete, empty Destination channel is detected by the time that the length of white chessman frame meets as far as possible to UE400 is reserved sufficient.Expanding Under exhibition CP, a subframe includes 12 symbols, if blank subframe is indicated by SRS configuration information, and this sky The length of white chessman frame is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank son Frame is configured in the case of the UE accessing this base station has data transfer demands by base station, and M is less than or equal to 11, I.e. the length of blank subframe is less than or equal to the length of 11 symbols.The mode of blank subframe flexible configuration is permissible Improve the compatibility to LTE system on unlicensed spectrum.
As the embodiment that another is feasible, when the SRS transmission pattern of UE400 is frequency division transmission pattern, The pilot frequency sequence of the most multiple UE carries out frequency division according to the mode that Comb is N, then SRS transmission position is i.e. For the Comb position that frequency domain position, i.e. UE400 are corresponding, wherein N is positive integer.
Accordingly, transmitting element 403 reports SRS to base station according to SRS transmission pattern on SRS transmission position Concrete mode be:
It is the transmission mode that N carries out frequency division according to Comb, corresponding Comb position reports to base station SRS。
Visible, in the UE described by Fig. 4, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill In art, SRS reports the problem postponing even cannot report in these cases.
Referring to Fig. 5, Fig. 5 is the structural representation of another kind of UE disclosed in the embodiment of the present invention, is used for holding The method that under unlicensed spectrum disclosed in the row embodiment of the present invention, SRS strengthens.As it is shown in figure 5, this UE500 May include that at least one processor 501, (Central Processing Unit, central authorities process such as CPU Device), at least one receptor 502, at least one transmitter 503, memorizer 504 assembly such as grade.Wherein, These assemblies are communicatively coupled by one or more bus 505.It will be understood by those skilled in the art that The structure of the UE500 shown in Fig. 5 is not intended that the restriction to the embodiment of the present invention, and it both can be bus Shape structure, it is also possible to be hub-and-spoke configuration, it is also possible to include that ratio illustrates more or less of parts, or combination Some parts, or different parts layouts.Wherein:
In the embodiment of the present invention, receptor 502 can include line interface, wave point etc., may be used for Receive the signal etc. of base station down transmission.Transmitter 503 can include line interface, wave point etc., can For to base station upstream signals etc..
In the embodiment of the present invention, memorizer 504 can be high-speed RAM memorizer, it is also possible to be non-instability Memorizer (non-volatile memory), for example, at least one disk memory.Memorizer 504 is optional Can also is that at least one is located remotely from the storage device of aforementioned processor 501.As it is shown in figure 5, memorizer Can include operating system, application program and data etc. in 504, the embodiment of the present invention is not construed as limiting.
In the UE500 shown in Fig. 5, what processor 501 may be used for calling storage in memorizer 504 should By program to perform following operation:
Triggering receptor 502 and receive the SRS configuration information that base station sends, wherein, SRS configuration information is used for Instruction UE500 reports SRS to base station in the predetermined symbol of default subframe.
Blank subframe detects whether destination channel is in idle condition.
In the case of destination channel is in idle condition, triggers transmitter 503 and exist according to SRS transmission pattern SRS transmission reports SRS to base station on position, so that base station carries out letter according to the SRS reported to destination channel Road is estimated.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE500, UE500 SRS transmission pattern and the SRS transmission position of UE500.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame does not carries out data transmission for indicating the UE accessing this base station in this blank subframe, then this blank Subframe can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station is permissible In SRS configuration information, the position of blank subframe is indicated broadcasting the SRS configuration information of this UE500 when, Access the UE of this base station when transmitting PUSCH data, this blank subframe would not be taken.So UE500 Before sending SRS, it is possible in blank subframe, destination channel is carried out the detection of LBT mechanism.
As the embodiment that another kind is feasible, this blank subframe can also is that base station is at the UE accessing this base station Configuration in the case of having data transfer demands, this blank subframe has the UE of data transfer demands for instruction This blank subframe does not carries out data transmission, then this blank subframe can include presetting in this default subframe Front M the symbol of symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station is permissible The position of blank subframe is determined, then above-mentioned UE giving the UE Resources allocation having data transfer demands when When transmitting PUSCH data, this blank subframe would not be taken.So UE500 is sending before SRS, Just in blank subframe, destination channel can be carried out the detection of LBT mechanism.
Further, under conventional CP, a subframe includes 14 symbols, if blank subframe is by SRS Configuration information indicates, the length of this blank subframe less than or equal to the length of a symbol, i.e. 1/14ms, about 71.4us;If blank subframe is configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 13, and i.e. the length of blank subframe is less than or equal to the length of 13 symbols.Concrete, empty Destination channel is detected by the time that the length of white chessman frame meets as far as possible to UE500 is reserved sufficient.Expanding Under exhibition CP, a subframe includes 12 symbols, if blank subframe is indicated by SRS configuration information, and this sky The length of white chessman frame is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank son Frame is configured in the case of the UE accessing this base station has data transfer demands by base station, and M is less than or equal to 11, I.e. the length of blank subframe is less than or equal to the length of 11 symbols.The mode of blank subframe flexible configuration is permissible Improve the compatibility to LTE system on unlicensed spectrum.
As the embodiment that another is feasible, when the SRS transmission pattern of UE500 is frequency division transmission pattern, The pilot frequency sequence of the most multiple UE carries out frequency division according to the mode that Comb is N, then SRS transmission position is i.e. For the Comb position that frequency domain position, i.e. UE500 are corresponding, wherein N is positive integer.
Accordingly, processor 501 triggers transmitter 503 according to SRS transmission pattern on SRS transmission position The concrete mode reporting SRS to base station is:
It is the transmission mode that N carries out frequency division according to Comb, corresponding Comb position reports to base station SRS。
Visible, in the UE described by Fig. 5, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill In art, SRS reports the problem postponing even cannot report in these cases.
Referring to Fig. 6, Fig. 6 is the structural representation of a kind of base station disclosed in the embodiment of the present invention, is used for performing The method that under unlicensed spectrum disclosed in the embodiment of the present invention, SRS strengthens.As shown in Figure 6, this base station 600 May include that
Transmitting element 601, is used for sending SRS configuration information, and wherein, this SRS configuration information is used for indicating The UE of access base station 600 reports SRS to base station 600 in the predetermined symbol of default subframe.
Receive unit 602, in blank subframe, detect that destination channel is in idle condition for receiving UE In the case of the SRS that reports on SRS transmission position according to SRS transmission pattern.
Channel estimating unit 603, carries out channel estimation for the SRS reported according to UE to destination channel.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE, UE The SRS transmission position of SRS transmission pattern and UE.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame is for indicating the UE of access base station 600 not carry out data transmission in this blank subframe, then this sky White chessman frame can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station 600 Can indicate in SRS configuration information broadcast needs the SRS configuration information sending the UE of SRS when The position of blank subframe, the UE of access base station 600, when transmitting PUSCH data, would not take this sky White chessman frame.So need the UE sending SRS before sending SRS, it is possible to mesh in blank subframe Mark channel carries out the detection of LBT mechanism.
As the embodiment that another kind is feasible, this blank subframe can also is that base station 600 is at access base station 600 UE configure in the case of having data transfer demands, this blank subframe has data transfer demands for instruction UE do not carry out data transmission in this blank subframe, then this blank subframe can include in this default subframe Front M the symbol of predetermined symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station 600 positions that can determine blank subframe giving the UE Resources allocation having data transfer demands when, then Above-mentioned UE, when transmitting PUSCH data, would not take this blank subframe.So need to send SRS UE sending before SRS, it is possible in blank subframe, destination channel is carried out the detection of LBT mechanism.
Further, under conventional CP, a subframe includes 14 symbols, if blank subframe is by SRS Configuration information indicates, the length of this blank subframe less than or equal to the length of a symbol, i.e. 1/14ms, about 71.4us;If blank subframe is configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 13, and i.e. the length of blank subframe is less than or equal to the length of 13 symbols.Concrete, empty Destination channel is detected by the time that the length of white chessman frame meets as far as possible to UE is reserved sufficient.In extension Under CP, a subframe includes 12 symbols, if blank subframe is indicated by SRS configuration information, and this blank The length of subframe is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank subframe Being configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 11, I.e. the length of blank subframe is less than or equal to the length of 11 symbols.The mode of blank subframe flexible configuration is permissible Improve the compatibility to LTE system on unlicensed spectrum.
As the embodiment that another is feasible, when the SRS transmission pattern of UE is frequency division transmission pattern, The pilot frequency sequence of the most multiple UE carries out frequency division according to the mode that Comb is N, then SRS transmission position is i.e. For frequency domain position, i.e. corresponding for this UE Comb position, wherein N is positive integer.
Accordingly, reception unit 602 receives UE and detects that in blank subframe destination channel is in idle condition In the case of the concrete mode of SRS that reports on SRS transmission position according to SRS transmission pattern be:
Receive UE in blank subframe, detect that destination channel in the case of being in idle condition according to Comb is N carries out the transmission mode of frequency division, the SRS reported on corresponding Comb position.
Visible, in the base station that Fig. 6 describes, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill In art, SRS reports the problem postponing even cannot report in these cases.
Referring to Fig. 7, Fig. 7 is the structural representation of another kind of base station disclosed in the embodiment of the present invention, is used for holding The method that DMRS disclosed in the row embodiment of the present invention strengthens.As it is shown in fig. 7, this base station 700 may include that At least one processor 701, such as CPU (Central Processing Unit, central processing unit), at least One receptor 702, at least one transmitter 703, memorizer 704 assembly such as grade.Wherein, these assemblies lead to Cross one or more bus 705 to be communicatively coupled.It will be understood by those skilled in the art that shown in Fig. 7 The structure of base station 700 be not intended that the restriction to the embodiment of the present invention, it both can be busbar network, Can also be hub-and-spoke configuration, it is also possible to include that ratio illustrates more or less of parts, or combine some parts, Or different parts are arranged.Wherein:
In the embodiment of the present invention, receptor 702 can include line interface, wave point etc., may be used for Receive the signal etc. of UE uplink.Transmitter 703 can include line interface, wave point etc., permissible For to UE downstream transmission signals etc..
In the embodiment of the present invention, memorizer 704 can be high-speed RAM memorizer, it is also possible to be non-instability Memorizer (non-volatile memory), for example, at least one disk memory.Memorizer 704 is optional Can also is that at least one is located remotely from the storage device of aforementioned processor 701.As it is shown in fig. 7, memorizer Can include application program and data etc. in 704, the embodiment of the present invention is not construed as limiting.
In the base station 700 shown in Fig. 7, processor 701 may be used for calling storage in memorizer 704 Application program is to perform following operation:
Triggering transmitter 703 and send SRS configuration information, wherein, this SRS configuration information is used for indicating access The UE of base station 600 reports SRS to base station 600 in the predetermined symbol of default subframe.
Triggering receptor 702 receives UE and detects that in blank subframe destination channel is in the situation of idle condition Under the SRS that reports on SRS transmission position according to SRS transmission pattern.
According to the SRS that UE reports, destination channel is carried out channel estimation.
In the embodiment of the present invention, this SRS configuration information can include but not limited to the mark of UE, UE The SRS transmission position of SRS transmission pattern and UE.
In the embodiment of the present invention, this blank subframe can include that in this default subframe, predetermined symbol (is i.e. used for passing The symbol of defeated SRS) previous symbol, can be specifically a part for this symbol, it is also possible to be whole.
As a kind of feasible embodiment, this blank subframe can be the instruction of SRS configuration information, this sky White chessman frame is for indicating the UE of access base station 700 not carry out data transmission in this blank subframe, then this sky White chessman frame can include the previous symbol of predetermined symbol in this default subframe (for transmitting the symbol of SRS), Can be specifically whole symbol, it is also possible to be a part for this symbol, such as 25us.Concrete, base station 700 Can indicate in SRS configuration information broadcast needs the SRS configuration information sending the UE of SRS when The position of blank subframe, the UE of access base station 700, when transmitting PUSCH data, would not take this sky White chessman frame.So need the UE sending SRS before sending SRS, it is possible to mesh in blank subframe Mark channel carries out the detection of LBT mechanism.
As the embodiment that another kind is feasible, this blank subframe can also is that base station 700 is at access base station 700 UE configure in the case of having data transfer demands, this blank subframe has data transfer demands for instruction UE do not carry out data transmission in this blank subframe, then this blank subframe can include in this default subframe Front M the symbol of predetermined symbol (for transmitting the symbol of SRS), M is positive integer.Concrete, base station 700 positions that can determine blank subframe giving the UE Resources allocation having data transfer demands when, then Above-mentioned UE, when transmitting PUSCH data, would not take this blank subframe.So need to send SRS UE sending before SRS, it is possible in blank subframe, destination channel is carried out the detection of LBT mechanism.
Further, under conventional CP, a subframe includes 14 symbols, if blank subframe is by SRS Configuration information indicates, the length of this blank subframe less than or equal to the length of a symbol, i.e. 1/14ms, about 71.4us;If blank subframe is configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 13, and i.e. the length of blank subframe is less than or equal to the length of 13 symbols.Concrete, empty Destination channel is detected by the time that the length of white chessman frame meets as far as possible to UE is reserved sufficient.In extension Under CP, a subframe includes 12 symbols, if blank subframe is indicated by SRS configuration information, and this blank The length of subframe is less than or equal to the length of a symbol, i.e. 1/12ms, about 83.3us;If blank subframe Being configured in the case of the UE accessing this base station has data transfer demands by base station, M is less than or equal to 11, I.e. the length of blank subframe is less than or equal to the length of 11 symbols.The mode of blank subframe flexible configuration is permissible Improve the compatibility to LTE system on unlicensed spectrum.
As a kind of feasible embodiment, when the SRS transmission pattern of UE is frequency division transmission pattern, i.e. The pilot frequency sequence of multiple UE carries out frequency division according to the mode that Comb is N, then SRS transmission position is Frequency domain position, i.e. corresponding for this UE Comb position, wherein N is positive integer.
Accordingly, processor 701 triggers receptor 702 and receives UE and destination channel detected in blank subframe It is in the concrete of the SRS that reports on SRS transmission position in the case of idle condition according to SRS transmission pattern Mode is:
Receive UE in blank subframe, detect that destination channel in the case of being in idle condition according to Comb is N carries out the transmission mode of frequency division, the SRS reported on corresponding Comb position.
Visible, in the base station described by Fig. 7, on unlicensed spectrum, when destination channel is transmitted PUSCH In the case of the UE of data is inconsistent with the UE reporting SRS, can will report the previous of the symbol of SRS Individual symbol be partly or entirely configured to blank subframe, so report the UE detection to destination channel of SRS Result is the free time, then reports the UE of SRS to can be carried out SRS and reports, thus solves existing skill The problem that in art, SRS cannot report in these cases, such that it is able to improve the data transmission efficiency of UE.
Unit in all embodiments of the invention, can pass through universal integrated circuit, such as CPU, or pass through ASIC (Application Specific Integrated Circuit, special IC) realizes.
It should be noted that for each embodiment of the method aforesaid, in order to be briefly described, therefore by its all table Stating as a series of combination of actions, but those skilled in the art should know, the present invention is not by described The restriction of sequence of movement because according to the application, certain some step can use other orders or simultaneously Carry out.Secondly, those skilled in the art also should know, embodiment described in this description belongs to excellent Select embodiment, necessary to involved action and module not necessarily the application.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, in certain embodiment the most in detail The thin part described, may refer to the associated description of other embodiments.
Step in embodiment of the present invention method can carry out order according to actual needs and adjust, merges and delete.
Unit in embodiment of the present invention base station or UE can merge according to actual needs, divides and delete.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, Can be by computer program and complete to instruct relevant hardware, described program can be stored in a calculating In machine read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method. Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, Or random access memory (Random Access Memory, be called for short RAM) etc. ROM).
Above to the embodiment of the present invention provide a kind of unlicensed spectrum under detection reference signal strengthen method and Relevant device is described in detail, and specific case used herein is to the principle of the present invention and embodiment Being set forth, the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention; Simultaneously for one of ordinary skill in the art, according to the thought of the present invention, in detailed description of the invention and should All will change with in scope, in sum, this specification content should not be construed as the limit to the present invention System.

Claims (16)

1. the method that under a unlicensed spectrum, detection reference signal SRS strengthens, it is characterised in that described side Method includes:
User terminal UE receives the SRS configuration information that base station sends, and described SRS configuration information is used for indicating Described UE reports SRS, described SRS configuration information bag in the predetermined symbol of default subframe to described base station Include the SRS transmission pattern of described UE and the SRS transmission position of described UE;
Described UE detects whether destination channel is in idle condition in blank subframe, and wherein, described target is believed Road is positioned at unlicensed spectrum;
In the case of described destination channel is in idle condition, described UE is according to described SRS transmission pattern Described SRS transmission position reports SRS to described base station so that described base station according to described SRS to institute State destination channel and carry out channel estimation.
Method the most according to claim 1, it is characterised in that described predetermined symbol is described default son Last symbol of frame;
Described blank subframe is indicated by described SRS configuration information, and described blank subframe is used for indicating access described The UE of base station does not carries out data transmission in described blank subframe, and described blank subframe includes described default subframe Described in the previous symbol of predetermined symbol;Or, described blank subframe is being accessed described base by described base station The UE stood configures in the case of having data transfer demands, and described blank subframe has data transfer demands for instruction UE do not carry out data transmission in described blank subframe, described blank subframe includes institute in described default subframe Stating front M the symbol of predetermined symbol, described M is positive integer.
Method the most according to claim 2, it is characterised in that under conventional cyclic prefix CP, as The most described blank subframe is indicated by described SRS configuration information, and the length of described blank subframe is less than or equal to 1/14ms, if described blank subframe is had data transfer demands by described base station at the UE accessing described base station In the case of configure, described M be less than or equal to 13;
Under extension CP, if described blank subframe is indicated by described SRS configuration information, described blank son The length of frame is less than or equal to 1/12ms, if described blank subframe is being accessed described base station by described base station UE configures in the case of having data transfer demands, and described M is less than or equal to 11.
4. according to the method described in any one of claims 1 to 3, when the SRS transmission pattern of described UE is many When the SRS pilot frequency sequence of individual UE carries out the transmission mode of frequency division according to the mode that transmission comb Comb is N, The SRS transmission position of described UE is Comb position corresponding for described UE, and described N is positive integer;
Described UE reports to described base station on described SRS transmission position according to described SRS transmission pattern SRS, including:
Described UE according to the transmission mode that Comb is that N carries out frequency division, on corresponding Comb position to Described base station reports SRS.
5. the method that under a unlicensed spectrum, SRS strengthens, it is characterised in that described method includes:
Base station sends SRS configuration information, and described SRS configuration information is for indicating the UE accessing described base station Report SRS in the predetermined symbol of default subframe to described base station, described SRS configuration information includes described UE SRS transmission pattern and the SRS transmission position of described UE;
Described base station receives described UE and detects that in blank subframe destination channel is in the situation of idle condition Under, the SRS reported on described SRS transmission position according to described SRS transmission pattern, wherein, described mesh Mark channel is positioned at unlicensed spectrum;
Described base station carries out channel estimation according to described SRS to described destination channel.
Method the most according to claim 5, it is characterised in that described predetermined symbol is described default son Last symbol of frame;
Described blank subframe is indicated by described SRS configuration information, and described blank subframe is used for indicating access described The UE of base station does not carries out data transmission in described blank subframe, and described blank subframe includes described default subframe Described in the previous symbol of predetermined symbol;Or, described blank subframe is being accessed described base by described base station The UE stood configures in the case of having data transfer demands, and described blank subframe has data transfer demands for instruction UE do not carry out data transmission in described blank subframe, described blank subframe includes institute in described default subframe Stating front M the symbol of predetermined symbol, described M is positive integer.
Method the most according to claim 6, it is characterised in that under conventional cyclic prefix CP, as The most described blank subframe is indicated by described SRS configuration information, and the length of described blank subframe is less than or equal to 1/14ms, if described blank subframe is had data transfer demands by described base station at the UE accessing described base station In the case of configure, described M be less than or equal to 13;
Under extension CP, if described blank subframe is indicated by described SRS configuration information, described blank son The length of frame is less than or equal to 1/12ms, if described blank subframe is being accessed described base station by described base station UE configures in the case of having data transfer demands, and described M is less than or equal to 11.
8. according to the method described in any one of claim 5~7, it is characterised in that as the SRS of described UE Transmission mode is that the SRS pilot frequency sequence of multiple UE carries out frequency division according to the mode that transmission comb Comb is N During transmission mode, the SRS transmission position of described UE is Comb position corresponding for described UE, described N For positive integer;
Described base station receives described UE and detects that in blank subframe destination channel is in the situation of idle condition Under the SRS that reports on described SRS transmission position according to described SRS transmission pattern, including:
Described base station receives described UE and detects that in blank subframe destination channel is in the situation of idle condition Under be the transmission mode that N carries out frequency division according to Comb, the SRS reported on corresponding Comb position.
9. a UE, it is characterised in that described UE includes:
Receiving unit, receive the SRS configuration information that base station sends, described SRS configuration information is used for indicating institute Stating UE and report SRS in the predetermined symbol of default subframe to described base station, described SRS configuration information includes The SRS transmission pattern of described UE and the SRS transmission position of described UE;
Detector unit, for detecting whether destination channel is in idle condition in blank subframe, wherein, institute State destination channel and be positioned at unlicensed spectrum;
Transmitting element, in the case of described destination channel is in idle condition, passes according to described SRS Defeated pattern reports SRS to described base station on described SRS transmission position, so that described base station is according to described SRS Described destination channel is carried out channel estimation.
UE the most according to claim 9, it is characterised in that described predetermined symbol is described default son Last symbol of frame;
Described blank subframe is indicated by described SRS configuration information, and described blank subframe is used for indicating access described The UE of base station does not carries out data transmission in described blank subframe, and described blank subframe includes described default subframe Described in the previous symbol of predetermined symbol;Or, described blank subframe is being accessed described base by described base station The UE stood configures in the case of having data transfer demands, and described blank subframe has data transfer demands for instruction UE do not carry out data transmission in described blank subframe, described blank subframe includes institute in described default subframe Stating front M the symbol of predetermined symbol, described M is positive integer.
11. UE according to claim 10, it is characterised in that under conventional cyclic prefix CP, as The most described blank subframe is indicated by described SRS configuration information, and the length of described blank subframe is less than or equal to 1/14ms, if described blank subframe is had data transfer demands by described base station at the UE accessing described base station In the case of configure, described M be less than or equal to 13;
Under extension CP, if described blank subframe is indicated by described SRS configuration information, described blank son The length of frame is less than or equal to 1/12ms, if described blank subframe is being accessed described base station by described base station UE configures in the case of having data transfer demands, and described M is less than or equal to 11.
12. according to the UE described in any one of claim 9~11, it is characterised in that as the SRS of described UE Transmission mode is that the SRS pilot frequency sequence of multiple UE carries out frequency division according to the mode that transmission comb Comb is N During transmission mode, the SRS transmission position of described UE is Comb position corresponding for described UE, described N For positive integer;
Described transmitting element according to described SRS transmission pattern on described SRS transmission position on described base station The concrete mode reporting SRS is:
It is the transmission mode that N carries out frequency division according to Comb, to described base station on corresponding Comb position Report SRS signal.
13. 1 kinds of base stations, it is characterised in that described base station includes:
Transmitting element, is used for sending SRS configuration information, and described SRS configuration information is used for indicating access described The UE of base station reports SRS, described SRS configuration information in the predetermined symbol of default subframe to described base station SRS transmission pattern and the SRS transmission position of described UE including described UE;
Receive unit, in blank subframe, detect that destination channel is in idle condition for receiving described UE In the case of the SRS that reports on described SRS transmission position according to described SRS transmission pattern, wherein, described Destination channel is positioned at unlicensed spectrum;
Channel estimating unit, for carrying out channel estimation according to described SRS to described destination channel.
14. base stations according to claim 13, it is characterised in that described predetermined symbol is described presetting Last symbol of subframe;
Described blank subframe is indicated by described SRS configuration information, and described blank subframe is used for indicating access described The UE of base station does not carries out data transmission in described blank subframe, and described blank subframe includes described default subframe Described in the previous symbol of predetermined symbol;Or, described blank subframe is being accessed described base by described base station The UE stood configures in the case of having data transfer demands, and described blank subframe has data transfer demands for instruction UE do not carry out data transmission in described blank subframe, described blank subframe includes institute in described default subframe Stating front M the symbol of predetermined symbol, described M is positive integer.
15. base stations according to claim 14, it is characterised in that under conventional cyclic prefix CP, as The most described blank subframe is indicated by described SRS configuration information, and the length of described blank subframe is less than or equal to 1/14ms, if described blank subframe is had data transfer demands by described base station at the UE accessing described base station In the case of configure, described M be less than or equal to 13;
Under extension CP, if described blank subframe is indicated by described SRS configuration information, described blank son The length of frame is less than or equal to 1/12ms, if described blank subframe is being accessed described base station by described base station UE configures in the case of having data transfer demands, and described M is less than or equal to 11.
16. according to the base station described in any one of claim 13~15, it is characterised in that when described UE's SRS transmission pattern is that the SRS pilot frequency sequence of multiple UE carries out frequency according to the mode that transmission comb Comb is N During the transmission mode divided, the SRS transmission position of described UE is Comb position corresponding for described UE, described N is positive integer;
Described reception unit receives described UE and detects that in blank subframe destination channel is in idle condition In the case of the SRS that reports on described SRS transmission position according to described SRS transmission pattern, including:
Receive described UE detect in blank subframe destination channel be in the case of idle condition according to Comb is the transmission mode that N carries out frequency division, the SRS reported on corresponding Comb position.
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Application publication date: 20160914