CN105933099A

CN105933099A - Method for transmitting channel sounding reference signals SRSs, terminal and base station

Info

Publication number: CN105933099A
Application number: CN201610397424.5A
Authority: CN
Inventors: 王建中
Original assignee: Shenzhen Jinli Communication Equipment Co Ltd
Current assignee: Shenzhen Jinli Communication Equipment Co Ltd
Priority date: 2016-06-06
Filing date: 2016-06-06
Publication date: 2016-09-07

Abstract

The embodiment of the invention discloses a method for transmitting channel sounding reference signals SRSs, a terminal and a base station. The method comprises following steps of receiving downlink service sent by the base station, wherein the downlink service is transmitted based on a target channel, and the target channel is the channel in an unlicensed frequency band; periodically sending the channel sounding reference signals SRSs to the base station, wherein the SRSs are used for sounding the channel quality of the target channel; judging whether the difference value between the deadline of the downlink service and the sending time of the SRSs is less than or equal to a preset threshold value or not when uplink service needs to be sent to the base station, wherein the SRSs are transmitted based in the target channel; not carrying out LBT sounding if the difference value is less than or equal to the preset threshold value; sending the uplink service to the base station; carrying out the LBT sounding if the difference value is more than the preset threshold value, wherein the LBT sounding is used for sounding the idle/busy state of the target channel; and sending the uplink service to the base station when the target channel is in an idle state. Through adoption of the method, the terminal and the base station, the times of carrying out LBT (Listen Before Talk) sounding can be reduced, and the data throughout can be improved.

Description

Method, terminal and the base station of a kind of transmission channel detection reference signal SRS

Technical field

The present invention relates to communication technical field, be specifically related to a kind of method of transmission channel detection reference signal SRS, terminal And base station.

Background technology

Along with sharply increasing of service of mobile communication, the mandate frequency range in 3GPP network is increasingly unsatisfactory for growing Portfolio, in order to improve frequency resource utilization ratio, 3GPP tissue proposes auxiliary and accesses (English: Licensed Assisted Access, is called for short LAA) technology, with by Long Term Evolution, (English: Long Time Evolution is called for short LTE) help authorizing frequency spectrum uses unauthorized frequency range.WiFi technology in unauthorized frequency range is to be connect by Carrier Sense Multiple Enter/collision detection (English: Carrier Sense Multiple Access/Collision Detection, it is called for short CSMA/ CA) interference between different WiFi equipment is eliminated.Before transmitting data, WiFi equipment is first kept out of the way, when back off time is tied During bundle, user could send signaling or data.In order to allow LTE equipment and WiFi equipment fair competition frequency spectrum in unauthorized frequency range Resource, 3GPP introduces listem-before-talk (English Listen Before Talk, be called for short LBT) mechanism in LAA, sets for LTE For the monitoring in unauthorized frequency range and monitoring idle channel.When the unauthorized frequency range free time being detected, start to take unauthorized Frequency range carries out data transmission.

In LTE system, it is (English: Sounding Reference that terminal sends measuring reference signals to base station Signal, is called for short SRS), to carry out the measurement of radio uplink channels, SRS is for assessing the uplink signal-channel quality of different frequency range.Eventually Hold when the transmission SRS of base station, in order to ensure that SRS can be successfully transmitted, when sending SRS every time, be required for carrying out performing LBT and survey Amount, seriously reduces data throughout.

Summary of the invention

Embodiments provide method, terminal and the base station of a kind of transmission channel detection reference signal SRS, can subtract Perform the number of times that LBT measures less, improve data throughout.

First aspect provides a kind of method of transmission channel detection reference signal SRS, including:

Receiving the downlink business that base station sends, described downlink business transmits based on destination channel, and described destination channel is non- Authorize the channel of frequency range；

Periodically send Sounding Reference Signal SRS, described SRS to be used for measuring described destination channel to described base station Channel quality；

When needs send described SRS to described base station, it is judged that the deadline of described downlink business and sending out of described SRS Whether send the difference of time less than or equal to predetermined threshold value, described SRS transmits based on described destination channel；

If described difference is less than or equal to described predetermined threshold value, does not perform listem-before-talk LBT and measure, send to described base station Described SRS；

If described difference is more than described predetermined threshold value, performing described LBT and measure, described LBT measurement is used for detecting described mesh The busy-idle condition of mark channel；

When described destination channel is idle condition, perform the described step sending described SRS to described base station.

In conjunction with first aspect, in the first implementation of first aspect, described periodically send to described base station Before detection reference signal SRS, described method also includes:

Receiving the SRS configuration signal that base station sends, described SRS configuration signal carries SRS configuration parameter, and described SRS configures Parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and described sub-frame configuration parameter configures described SRS's for described terminal In the cycle, described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

In conjunction with the first implementation of first aspect or first aspect, in the second implementation of first aspect, Described method also includes:

When needs send PUSCH data to described base station, determine the transmission time of described PUSCH data and described SRS The interval sending the time whether more than or equal to a period of sub-frame, if the transmission time of described PUSCH data and described SRS The interval sending the time more than or equal to one period of sub-frame, described SRS is respectively put into not with described PUSCH data Sending in same subframe, and described SRS is positioned on first symbol of SRS, described SRS is for comprising described SRS Subframe.

In conjunction with the first implementation or the second implementation of first aspect of first aspect or first aspect, In the third implementation on the one hand, described method also includes:

When needs send PUSCH data to described base station, if the time that sends of described PUSCH data is with described SRS's The interval of transmission time is less than one period of sub-frame, is put in same subframe with described PUSCH data by described SRS.

In conjunction with the first implementation of first aspect or first aspect, in the 4th kind of implementation of first aspect, When the SRS of different terminals needs to send in same subframe, described SRS uses comb structure, wherein, different terminals SRS occupy the different sub carrier of same subframe symbol.

Second aspect provides a kind of method transmitting SRS, including:

When destination channel is idle condition, sending described downlink business to terminal, described destination channel is unauthorized frequency The channel of section, described downlink business transmits based on described destination channel；

Wherein, when described terminal needs to send periodic SRS to base station, described terminal is used for judging described lower industry Whether the deadline of business and the difference sending the time of described SRS be less than or equal to predetermined threshold value, and described terminal is additionally operable to work as When described difference is less than or equal to described predetermined threshold value, does not perform listem-before-talk LBT and measure, send described SRS to described base station； Described terminal is additionally operable to, when described difference is more than described predetermined threshold value, perform described LBT and measure, and described LBT measurement is used for detecting The busy-idle condition of described destination channel；Described terminal is additionally operable to, when described destination channel is idle condition, send out to described base station Send described SRS；Wherein, described SRS is for measuring the channel quality of described destination channel.

It is in conjunction with second aspect, in the first implementation of second aspect, described before terminal sends downlink business, Described method also includes:

Sending SRS configuration signal to described terminal, described SRS configuration signal carries SRS configuration parameter, and described SRS configures Parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and described sub-frame configuration parameter configures described SRS's for described terminal In the cycle, described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

In conjunction with the first implementation of second aspect or second aspect, in the second implementation of second aspect,

Described terminal is additionally operable to, when described terminal needs to send PUSCH data to described base station, determine described PUSCH number According to the interval sending the time sending time and described SRS whether be more than or equal to a period of sub-frame；

Described terminal is additionally operable to when the transmission time of described PUSCH data and the interval sending the time of described SRS are more than Or during equal to one period of sub-frame, described SRS is respectively put in different subframes from described PUSCH data transmission；Its In, described SRS is positioned on first symbol of SRS, and described SRS is the subframe comprising described SRS.

In conjunction with the second implementation of second aspect, in the third implementation of second aspect, described terminal is also For when the interval sending the time sending time and described SRS of described PUSCH data is less than one period of sub-frame, Described SRS is put in same subframe with described PUSCH data.

In conjunction with the first implementation of second aspect or second aspect, in the 4th kind of implementation of second aspect, When the SRS of different terminals needs to send in same subframe, described SRS uses comb structure, wherein, different terminals SRS occupy the different sub carrier of same subframe symbol.

The third aspect provides a kind of terminal, including:

First receives unit, and for receiving the downlink business that base station sends, described downlink business transmits based on destination channel, Described destination channel is the channel of unauthorized frequency range；

Transmitting element, is used for surveying for periodically sending Sounding Reference Signal SRS, described SRS to described base station Measure the channel quality of described destination channel；

Judging unit, for when described transmitting element needs to send described SRS to described base station, it is judged that described lower industry Whether the deadline of business and the difference sending the time of described SRS be less than or equal to predetermined threshold value, and described SRS is based on described mesh Mark transmission；

Described transmitting element, for when described difference is less than or equal to described predetermined threshold value, not performing listem-before-talk LBT Measure, send described SRS to described base station；

Measuring unit, for when described difference is more than described predetermined threshold value, performs described LBT and measures, and described LBT measures For detecting the busy-idle condition of described destination channel；

Described transmitting element, is additionally operable to when described destination channel is idle condition, sends described SRS to described base station.

In conjunction with the third aspect, in the first implementation of the third aspect, described terminal also includes:

Second receives unit, and for receiving the SRS configuration signal that base station sends, described SRS configuration signal carries SRS configuration Parameter, described SRS configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and described sub-frame configuration parameter is used for described end End configures the cycle of described SRS, and described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

In conjunction with the first implementation of the third aspect or the third aspect, in the second implementation of the third aspect, Described terminal also includes:

Determine unit, for when needs send PUSCH data to described base station, determining the transmission of described PUSCH data Whether the interval sending the time of time and described SRS is more than or equal to a period of sub-frame；

Described transmitting element, is additionally operable to the interval sending the time of the transmission time when described PUSCH data and described SRS During more than or equal to one period of sub-frame, described SRS is respectively put in different subframes from described PUSCH data and sends out Sending, and described SRS is positioned on first symbol of SRS, described SRS is the subframe comprising described SRS.

In conjunction with the first implementation or the second implementation of the third aspect of the third aspect or the third aspect, In the third implementation of three aspects,

Described transmitting element, be additionally operable to when need to described base station send PUSCH data, and described PUSCH data send out When the interval sending the time sending time and described SRS is less than one period of sub-frame, by described SRS and described PUSCH number According to putting in same subframe.

In conjunction with the first implementation of the third aspect or the third aspect, in the 4th kind of implementation of the third aspect, When the SRS of different terminals needs to send in same subframe, described SRS uses comb structure, wherein, different terminals SRS occupy the different sub carrier of same subframe symbol.

Fourth aspect provides a kind of base station, including:

Transmitting element, for when destination channel is idle condition, sends downlink business to terminal, and described destination channel is The channel of unauthorized frequency range, described downlink business transmits based on described destination channel；

In conjunction with fourth aspect, in the first implementation of fourth aspect, described transmitting element, it is additionally operable to described end End sends SRS configuration signal, and described SRS configuration signal carries SRS configuration parameter, and described SRS configuration parameter includes sub-frame configuration Parameter and frequency domain configuration parameter, described sub-frame configuration parameter configures the cycle of described SRS, described frequency domain configuration for described terminal Parameter configures the covering frequency band of described SRS for described terminal.

In conjunction with the first implementation of fourth aspect or fourth aspect, in the second implementation of fourth aspect,

In conjunction with the second implementation of fourth aspect, in the third implementation of fourth aspect, described terminal is also For when the interval sending the time sending time and described SRS of described PUSCH data is less than one period of sub-frame, Described SRS is put in same subframe with described PUSCH data.

In conjunction with the first implementation of fourth aspect or fourth aspect, in the 4th kind of implementation of fourth aspect, When the SRS of different terminals needs to send in same subframe, described SRS uses comb structure, wherein, different terminals SRS occupy the different sub carrier of same subframe symbol.

In the embodiment of the present invention, terminal receives the downlink business that base station sends, and downlink business transmits based on destination channel, mesh Mark channel is the channel of unauthorized frequency range；Send to base station the Sounding Reference Signal SRS, SRS of terminal periodic are used for surveying The channel quality of amount destination channel；When needs send SRS to base station, deadline of terminal judges downlink business and SRS's Whether the difference of transmission time is less than or equal to predetermined threshold value, and SRS transmits based on destination channel；If difference is less than or equal to presetting Threshold value, terminal does not perform listem-before-talk LBT and measures, and sends SRS to base station.When the deadline of downlink business is with transmission SRS's When time difference is less than or equal to predetermined threshold value, then it is believed that there is no it between transmission downlink business and SRS in destination channel His packet sends, and will not collide, and measures without carrying out LBT, directly transmits SRS, implements the embodiment of the present invention, permissible Reduce and perform the number of times that LBT measures, improve data throughout.

Accompanying drawing explanation

In order to be illustrated more clearly that embodiment of the present invention technical scheme, required use in embodiment being described below Accompanying drawing is briefly described, it should be apparent that, the accompanying drawing in describing below is some embodiments of the present invention, general for this area From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the schematic flow sheet of a kind of method transmitting SRS disclosed in the embodiment of the present invention；

Fig. 1 a is a kind of subframe structure schematic diagram disclosed in the embodiment of the present invention；

Fig. 1 b is the embodiment of the present invention another subframe structure schematic diagram disclosed；

Fig. 1 c is the embodiment of the present invention another subframe structure schematic diagram disclosed；

Fig. 2 is the schematic flow sheet of the method for another kind of transmission SRS disclosed in the embodiment of the present invention；

Fig. 3 is the structural representation of a kind of terminal disclosed in the embodiment of the present invention；

Fig. 4 is the structural representation of a kind of base station disclosed in the embodiment of the present invention；

Fig. 5 is the structural representation of the embodiment of the present invention another terminal disclosed；

Fig. 6 is the structural representation of the embodiment of the present invention another base station disclosed.

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 clear, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

Term " first ", " second " and " the 3rd " in description and claims of this specification and Figure of description Deng time be used for distinguishing different object rather than for describing particular order.Additionally, term " includes " and " having " and they Any deformation, it is intended that cover non-exclusive comprising.Such as contain series of steps or the process of unit, method, system, Product or equipment are not limited to step or the unit listed, but optionally also include step or the unit do not listed, Or optionally also include other steps intrinsic to these processes, method, product or equipment or unit.

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 be many Location (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.Term " network " and " system " generally exchange use.Cdma network Can realize such as general land wireless access (Universal Telecommunication Radio Access, UTRA), Telecommunications industry association (Telecommunications Industry Association, TIA) etc wireless technology. UTRA technology includes other modification of wideband CDMA (WCDMA) and 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 (Wireless Fidelity, Wi-Fi), (worldwide interoperability for microwave connects IEEE802.16 Enter Worldwide Interoperability for Microwave Access, WiMAX), IEEE802.20, Flash- The wireless technology of OFDMA etc.UTRA and E-UTRA technology is a part of Universal Mobile Telecommunications System (UMTS).3GPP is long-term Evolution (Long Term Evolution, LTE) and senior LTE (LTE-A) are the more recent versions of the UMTS using E-UTRA.? Describe in the document of the tissue of entitled " third generation partner program " (3GPP) UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM.The document of the tissue of call oneself " third generation partner program 2 " (3GPP2) describes and UMB.This Technology described in literary composition may be used for wireless network mentioned above and wireless access technology, and other wireless network and Wireless access technology.For the sake of clarity, some aspect of this technology is (or to be generically and collectively referred to as LTE or LTE-A below " LTE/-A ") be described, and use this LTE/-A term in following many descriptions.

ENodeB (eNB) can be the station communicated with user equipment (UE), and is referred to as base station, node B, access point Deng.Each eNB can provide communication overlay for specific geographic area.In 3 gpp, term " community " is according to using this art The context of language can refer to this specific geographical coverage area of eNB and/or serve the eNB subsystem of this overlay area This specific geographical coverage area.

ENB can provide communication overlay for macrocell, picocell, Femto cell and/or other type of community. Macrocell generally covers relatively large geographic area (such as, radius is the scope of a few km), and can allow by having The unconfined access of UE of the service signing with network provider.Picocell generally covers relatively small geographic area, and And can allow by the unconfined access of UE of the service signing having with network provider.Femto cell generally also covers phase To less geographic area (such as, family), and may be provided in addition to unconfined access by having and femto The limited access of the UE of cell association (such as, the UE in closed user group (Closed Subscriber Group, CSG), The UE etc. of the user in family).The eNB of macrocell is referred to alternatively as grand eNB.The eNB of picocell is referred to alternatively as slight eNB.With And, the eNB of Femto cell is referred to alternatively as femto eNB or family eNB.

Referring to Fig. 1, Fig. 1 is the schematic flow sheet of a kind of method transmitting SRS disclosed in the embodiment of the present invention.This enforcement The method of the transmission SRS described in example, comprises the steps.

101, terminal receives the downlink business that base station sends, and downlink business transmits based on destination channel, and destination channel is non- Authorize the channel of frequency range.

In the embodiment of the present invention, terminal receives the downlink business that base station sends, and downlink business transmits based on destination channel, under The data that industry business sends to terminal for base station.When base station carries out downlink traffic transmission with terminal, base station is under terminal sends Industry is engaged in, base station can by Physical Downlink Shared Channel (English: Physical Downlink Shared Channel, Be called for short PDSCH) in the reference signal (English: Reference Signal, to be called for short RS) that comprises destination channel carried out channel estimate Meter, and estimate, according to channel, the deadline that base station is transmitted with user equipment downlink data (i.e. downlink business), base station can be estimated Go out the deadline of downlink traffic transmission.Destination channel is carried out by reference signal RS that base station can comprise in by PDSCH Before channel is estimated, performing LBT and measure, LBT measures the busy-idle condition for detecting above-mentioned destination channel, when above-mentioned mesh being detected When mark channel is idle condition, base station sends reference signal RS to terminal and carries out channel estimation, estimates the matter of above-mentioned destination channel Amount.Above-mentioned destination channel is the channel of unauthorized frequency range, and the operating frequency of the most above-mentioned destination channel is positioned in unauthorized frequency range.

102, send to base station the Sounding Reference Signal SRS, SRS of terminal periodic is used for measuring the letter of destination channel Road quality.

In the embodiment of the present invention, terminal periodically can send Sounding Reference Signal SRS, wherein, SRS to base station For measuring the channel quality of destination channel.SRS in the embodiment of the present invention, can be periodic SRS, it is also possible to be non-week The SRS of phase property, wherein periodically SRS is joined by wireless heterogeneous networks (English: Radio Resource Control, RRC) Putting, configuration cycle is that { 2,5,10,20,20,80,160,320} milliseconds, acyclic SRS base station can be by descending control Information DCI format 0/4/1A triggering terminal sends.

103, when terminal needs to send SRS to base station, during the transmission of deadline of terminal judges downlink business and SRS Between difference whether less than or equal to predetermined threshold value, SRS transmits based on destination channel.

In the embodiment of the present invention, when terminal need to base station send SRS time, the deadline of terminal judges downlink business and Whether the difference sending the time of SRS is less than or equal to predetermined threshold value, and wherein, SRS transmits based on destination channel.Under terminal judges Whether the deadline of industry business and the difference sending the time of SRS are less than or equal to predetermined threshold value: under terminal judges Whether last subframe of industry business and SRS distance in time-domain be less than predetermined threshold value.It should be noted that step Terminal in 102 can be same terminal with the terminal in step 101, it is also possible to is different terminals.Terminal sends to base station SRS is in order to carry out uplink channel estimation to destination channel.In prior art, before terminal sends SRS to base station, terminal needs to hold Row LBT measures, the busy-idle condition of detection destination channel, and only when destination channel is in idle condition, terminal just sends to base station SRS.In embodiments of the present invention, terminal is when sending SRS, when the downlink business of a transmission upper in terminal judges destination channel When being less than or equal to predetermined threshold value with the time interval being currently needed for transmission SRS, it is not necessary to perform LBT and measure, directly transmit SRS, Can reduce and perform the number of times that LBT measures, improve data throughout.

Whether be in a kind of exemplary mode of idle condition as detection destination channel, concrete, UE detects around Miscellaneous equipment whether is had just to send PUSCH data in destination channel.If this target channel is taken by miscellaneous equipment, permissible Continue when next listening period arrives to monitor, it is also possible to no longer monitor according to instruction；If it is idle to listen to channel resource, this UE This destination channel can be taken immediately.Channel holding time is a fixed value, and this fixed value is the configuration of SRS configuration information The time span of last symbol of sub-frame of uplink, it is contemplated that UE is reported to the transfer process of Channel Detection, Ke Yi at SRS Subsequent channels detection sets a silence period 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 destination channel is in sky Not busy state, then back off time terminates, and this UE just can take this destination channel and carries out SRS and report simultaneously.If UE detects letter Road state is busy (the most being taken by other UE), then within this cycle equipment can not busy channel, then this UE is permissible By the time detection is continued in the fixed position of next cycle.

The mode that the another kind of idle condition is exemplary whether it is in as detection destination channel, concrete, when UE needs The when of reporting SRS, trigger initial detecting.If UE initial detecting is in idle condition to destination channel, this target can be taken Channel, and it is pre-configured with a Channel holding time T by base station；If UE initial detecting is busy, then to destination channel state (defer period) time in a postponement cycle can be generated, if still detecting that destination channel is done cycle time postponing, Then continue to generate one and postpone cycle time.UE can take mesh after L detection time detecting is the free time to channel status Mark channel, taking the destination channel time is T.

Optionally, when terminal needs to send PUSCH data to base station, terminal determine transmission time of PUSCH data with Whether the interval sending the time of SRS is more than or equal to a period of sub-frame, if the time that sends of PUSCH data and sending out of SRS Sending the interval of time more than or equal to a period of sub-frame, SRS from PUSCH data are respectively put in different subframes by terminal to be sent out Sending, and SRS is positioned on first symbol of SRS, SRS is the subframe comprising SRS.As shown in Figure 1a, SRS is positioned at On first symbol of SRS.Fig. 1 a is a kind of subframe structure schematic diagram disclosed in the embodiment of the present invention, in Fig. 1 a, up Business (including SRS) can include multiple subframe, owing to the time that sends of PUSCH data and the interval sending the time of SRS are big In or equal to a period of sub-frame, uplink service includes SRS and does not include PUSCH data, and SRS is positioned at first of uplink service In subframe, concrete, SRS may be located at first subframe of uplink service any one single-carrier frequency division multiple access (English: Single-carrier Frequency-DivisionMultiple Access, is called for short SC-FDMA) in symbol, SRS can position In first SC-FDMA symbol of first subframe of uplink service, it is also possible to be positioned at first subframe of uplink service In last SC-FDMA symbol, the deadline of downlink business and the difference sending the time of SRS are less than or equal to presetting threshold Value, as shown in Figure 1a, predetermined threshold value can be 16 microseconds (us), downlink business and SRS distance in time-domain less than or etc. In 16us.

Optionally, if the interval sending the time of the time that sends of PUSCH data and SRS is less than a period of sub-frame, eventually SRS Yu PUSCH data are put in same subframe by end.SRS Yu PUSCH data (include SRS and PUSCH number at uplink service According to) same subframe in.As shown in Figure 1 b, Fig. 1 b is the embodiment of the present invention another subframe structure schematic diagram disclosed, figure In 1b, uplink service includes SRS and PUSCH data, wherein, SRS Yu PUSCH data in the same subframe of uplink service, Such as in first subframe of uplink service, SRS may be located at first SC-FDMA symbol in above-mentioned same subframe In, PUSCH data are positioned at before SRS, as shown in Fig. 1 b (1)；SRS can also be positioned at last of above-mentioned same subframe In SC-FDMA symbol, PUSCH data are positioned at after SRS, as shown in Fig. 1 b (2).The deadline of downlink business and sending out of SRS Sending the difference of time less than or equal to predetermined threshold value, as shown in Figure 1 b, predetermined threshold value can be 16 microseconds (us), downlink business with SRS distance in time-domain is less than or equal to 16us.

Optionally, when the SRS of different terminals needs to send in same subframe, SRS uses comb structure, its In, the SRS of different terminals occupies the different sub carrier of same subframe symbol.As illustrated in figure 1 c, Fig. 1 c is that the present invention implements Example another subframe structure schematic diagram disclosed, in Fig. 1 c, uplink service includes the SRS using comb structure, downlink business The difference sending the time of deadline and SRS is less than or equal to predetermined threshold value, and as illustrated in figure 1 c, predetermined threshold value can be 16 micro- Second (us), downlink business and SRS distance in time-domain are less than or equal to 16us.In time domain, each SRS can be divided into 12 Individual OFDM (English: Orthogonal Frequency Division Multiplexing, to be called for short OFDM) symbol, Each OFDM symbol can include N number of subcarrier on frequency domain, and the size of N is determined by LTE system band width configuration parameter, different Same OFDM symbol that terminal takies at SRS and identical Resource Block (English: Resource Block, to be called for short RB) is upper sends, Different terminals can take different subcarriers, owing to SRS maps every a subcarrier, thus forms the frequency of comb structure Spectrum.

SRS in the embodiment of the present invention, can be periodic SRS, it is also possible to be acyclic SRS, wherein cycle Property SRS by wireless heterogeneous networks (English: Radio Resource Control, RRC) configuration, configuration cycle be 2,5, 10,20,20,80,160,320} milliseconds, Downlink Control Information DCI format 0/4/ can be passed through in acyclic SRS base station 1A triggering terminal sends.

If 104 differences are less than or equal to predetermined threshold value, not performing listem-before-talk LBT and measure, terminal sends SRS to base station.

In the embodiment of the present invention, when the deadline of downlink business and the difference sending the time of SRS are less than or equal to pre- If during threshold value, terminal is performed without LBT and measures, and directly sends SRS to base station, it is possible to reduce perform the number of times that LBT measures, improve Data throughout.

If 105 differences are more than predetermined threshold value, terminal performs LBT and measures, and LBT measures the busy for detecting destination channel State.

106, when destination channel is idle condition, terminal sends SRS to base station.

In the embodiment of the present invention, when the deadline of downlink business and the difference sending the time of SRS are more than predetermined threshold value Time, then need to perform LBT and measure, when LBT measurement destination channel is in idle condition, terminal just sends SRS to base station.Above-mentioned SRS includes periodic SRS, it is also possible to include acyclic SRS, can sending out by SRS configuration parameter configuration SRS Sending the time, when the time that sends of SRS is identical with the transmission time of PUSCH data, SRS Yu PUSCH data are in same subframe Interior transmission, when the transmission time of SRS differed with the transmission time of PUSCH data, SRS with PUSCH data are not same Send in subframe.Implement the embodiment of the present invention, only when the deadline of downlink business and the difference sending the time of SRS are more than pre- If during threshold value, perform LBT and measure, it is possible to reduce perform the number of times that LBT measures, improve data throughout.

Optionally, before step 102, it is also possible to execution following steps:

Terminal receives the SRS configuration signal that base station sends, and SRS configuration signal carries SRS configuration parameter, SRS configuration parameter Including sub-frame configuration parameter and frequency domain configuration parameter；Sub-frame configuration parameter is for the cycle of terminal configuration SRS, frequency domain configuration parameter Covering frequency band for terminal configuration SRS.

In the embodiment of the present invention, base station can be (English: Physical by high-level signaling or Physical Downlink Control Channel Downlink Control Channel, is called for short PDCCH) signaling configures SRS parameter to terminal, and by broadcast channel (English: Broadcast Channel, is called for short BCH) in community under broadcast them base station for the subframe of SRS transmission, wherein, SRS joins Put parameter and include sub-frame configuration parameter and frequency domain configuration parameter.Sub-frame configuration parameter is for the cycle of terminal configuration SRS, and frequency domain is joined Put the parameter covering frequency band for terminal configuration SRS.

In sub-frame configuration parameter, such as, at FDD, (English: Frequency Division Duplexing is called for short FDD), in, send periodic SRS and meet following condition:

(10×n_f+K_SRS-T_offset)mod T_SRS=0；

Wherein, n_fRepresent System Frame Number, K_SRSRepresent the subframe numbers in each system-frame, k_SRS∈{0,1,...9}.Cycle Property SRS send T_offsetAnd T_SRSValue as shown in table 1.

Table 1

In fdd, send acyclic SRS and meet following condition:

(10×n_f+K_SRS-T_offset,1)mod T_SRS,1=0；

Wherein, T_offset,1And T_SRS,1Value as shown in table 2.

Table 2

SRS configuration index I_SRS	SRS cycle T_SRS,1(ms)	SRS skew T_offset,1
			0-1	2	I_SRS
2-6	5	I_SRS-2
			7-16	10	I_SRS-7
17-31	reserved	reserved

In frequency domain configuration parameter, the frequency domain position of SRS can be realized by " broadband SRS " and " arrowband SRS ", wherein, For " arrowband SRS ", base station generally sends multiple " arrowband SRS ", and frequency hopping on frequency domain, and associating SRS obtains frequency interested Segment information.It should be noted that aperiodic SRS does not support frequency hopping.

By implementing the method shown in Fig. 1, it is possible to reduce perform the number of times that LBT measures, improve data throughout.Additionally, Can reasonably be configured the transmission position of SRS by SRS configuration parameter, improve terminal and send the success rate of SRS, facilitate base station to obtain Take the link-quality of different terminals.Can be according to the deadline of downlink business, the configuration parameter of flexible configuration SRS so that under The deadline of industry business and the difference of the transmission time of SRS are less than or equal to predetermined threshold value, it is not necessary to perform LBT and measure, improve non- Authorize the availability of frequency spectrum of frequency range, reduce the power consumption of terminal.

Referring to Fig. 2, Fig. 2 is the schematic flow sheet of the method for another kind of transmission SRS disclosed in the embodiment of the present invention.This reality The method executing transmission SRS described in example, comprises the steps.

201, when destination channel is idle condition, base station sends downlink business to terminal, and destination channel is unauthorized frequency The channel of section, downlink business transmits based on destination channel.

Wherein, when terminal need to base station send periodic SRS time, the deadline of terminal judges downlink business and Whether the difference sending the time of SRS is less than or equal to predetermined threshold value, and when difference is less than or equal to predetermined threshold value, terminal is not held Row listem-before-talk LBT measures, and sends SRS to base station；When difference is more than predetermined threshold value, and terminal performs LBT and measures, and LBT measures use Busy-idle condition in detection destination channel；When destination channel is idle condition, terminal sends SRS to base station；Wherein, SRS uses In the channel quality measuring destination channel.

In the embodiment of the present invention, when base station needs to send downlink business to terminal, base station can first carry out LBT and measure, The busy-idle condition of detection destination channel, when destination channel is idle condition, base station sends downlink business, destination channel to terminal For the channel of unauthorized frequency range, downlink business transmits based on destination channel.Downlink business can be Physical Downlink Shared Channel (English Literary composition: Physical Downlink Shared Channel, is called for short PDSCH) data, the reference signal (English comprised in PDSCH Literary composition: Reference Signal, is called for short RS), RS is for carrying out channel estimation to destination channel.

Optionally, before performing step 201, it is also possible to perform step 202.

202, base station sends SRS configuration signal to terminal, and SRS configuration signal carries SRS configuration parameter, SRS configuration parameter Including sub-frame configuration parameter and frequency domain configuration parameter, sub-frame configuration parameter is for the cycle of terminal configuration SRS, frequency domain configuration parameter Covering frequency band for terminal configuration SRS.

Wherein, base station sends SRS configuration signal to terminal, so that terminal is joined according to the sub-frame configuration in SRS configuration signal Number and the transmission time of frequency domain configuration parameter configuration SRS, base station can configure the transmission time of SRS by SRS configuration signal, with Make the deadline of downlink business and the difference sending the time of SRS be less than predetermined threshold value, reach to reduce performing LBT pendulous frequency Purpose.SRS configuration signal carries SRS configuration parameter, and SRS configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter. Wherein, in sub-frame configuration parameter, such as, at FDD, (English: Frequency Division Duplexing is called for short FDD), in, send periodic SRS and meet following condition:

(10×n_f+K_SRS-T_offset)mod T_SRS=0；

Wherein, n_fRepresent System Frame Number, K_SRSRepresent the subframe numbers in each system-frame, k_SRS∈{0,1,...9}.Cycle Property SRS send T_offsetAnd T_SRSValue as shown in Table 1 above.

In the embodiment of the present invention, base station can configure the transmission time of SRS by SRS configuration signal, so that downlink business The difference sending the time of deadline and SRS, less than predetermined threshold value, reaches to reduce the purpose performing LBT pendulous frequency.

Wherein, SRS includes periodic SRS or acyclic SRS.

Optionally, terminal is used for when terminal needs to send PUSCH data to base station, when determining the transmission of PUSCH data Between and the interval sending the time of SRS whether more than or equal to a period of sub-frame, terminal is additionally operable to when the transmission of PUSCH data When the interval sending the time of time and SRS is more than or equal to a period of sub-frame, SRS Yu PUSCH data are respectively put into not Sending in same subframe, and SRS is positioned on first symbol of SRS, SRS is the subframe comprising SRS.SRS position In first subframe of SRS.As shown in Figure 1a, Fig. 1 a is a kind of subframe structure schematic diagram, figure disclosed in the embodiment of the present invention In 1a, uplink service (including SRS) can include multiple subframe, due to the transmission time sending time and SRS of PUSCH data Interval more than or equal to a period of sub-frame, uplink service includes SRS and does not include PUSCH data, and SRS is positioned at the of SRS In one subframe, concrete, SRS may be located at first subframe of uplink service any one single-carrier frequency division multiple access (English: Single-carrier Frequency-Division Multiple Access, is called for short SC-FDMA) in symbol, SRS is permissible In first SC-FDMA symbol of first subframe being positioned at uplink service, it is also possible to be positioned at first subframe of uplink service Last SC-FDMA symbol in, the difference sending the time of deadline of downlink business and SRS is less than or equal to presetting Threshold value, as shown in Figure 1a, predetermined threshold value can be 16 microseconds (us), downlink business and SRS distance in time-domain less than or Equal to 16us.

Optionally, terminal is additionally operable to when the transmission time of PUSCH data and the interval sending the time of SRS are less than a son During the frame period, SRS Yu PUSCH data are put in same subframe.SRS Yu PUSCH data uplink service (include SRS and PUSCH data) same subframe in.As shown in Figure 1 b, Fig. 1 b is that the embodiment of the present invention another subframe structure disclosed shows Being intended to, in Fig. 1 b, uplink service includes SRS and PUSCH data, wherein, and same at uplink service of SRS with PUSCH data In subframe, such as in first subframe of uplink service, SRS may be located at first SC-in above-mentioned same subframe In FDMA symbol, PUSCH data are positioned at before SRS, as shown in Fig. 1 b (1)；SRS can also be positioned at above-mentioned same subframe In later SC-FDMA symbol, PUSCH data are positioned at after SRS, as shown in Fig. 1 b (2).The deadline of downlink business and The difference sending the time of SRS is less than or equal to predetermined threshold value, and as shown in Figure 1 b, predetermined threshold value can be 16 microseconds (us), under Industry business and SRS distance in time-domain are less than or equal to 16us.

Optionally, when the SRS of different terminals needs to send in same subframe, SRS uses comb structure, its In, the SRS of different terminals occupies the different sub carrier of same subframe symbol.As illustrated in figure 1 c, Fig. 1 c is that the present invention implements Example another subframe structure schematic diagram disclosed, in Fig. 1 c, SRS includes the SRS using comb structure, during the cut-off of downlink business Between and the difference sending the time of SRS less than or equal to predetermined threshold value, as illustrated in figure 1 c, predetermined threshold value can be 16 microseconds (us), downlink business and SRS distance in time-domain are less than or equal to 16us.In time domain, each SRS can be divided into 12 OFDM (English: Orthogonal Frequency Division Multiplexing, to be called for short OFDM) symbol, often Individual OFDM symbol can include N number of subcarrier on frequency domain, and the size of N is determined by LTE system band width configuration parameter, different ends Hold the same OFDM symbol taken at SRS and identical Resource Block (English: Resource Block, to be called for short RB) is upper sends, no Same terminal can take different subcarriers, owing to SRS maps every a subcarrier, thus forms the frequency of comb structure Spectrum.

Implementing the method shown in Fig. 2, base station is after terminal sends downlink business, when terminal sends SRS to base station, as When really the difference sending the time of the deadline of downlink business and SRS is less than predetermined threshold value, then need not perform a LBT again and survey Amount, directly transmits SRS, it is possible to reduce perform the number of times that LBT measures.

Referring to Fig. 3, Fig. 3 is the structural representation of a kind of terminal disclosed in the embodiment of the present invention.Embodiment of the present invention institute The terminal described, including the first reception unit 301, transmitting element 302, judging unit 303 and measuring unit 304, wherein:

First receives unit 301, and for receiving the downlink business that base station sends, downlink business transmits based on destination channel, Destination channel is the channel of unauthorized frequency range.

In the embodiment of the present invention, first receives unit 301 receives the downlink business that base station sends, and downlink business is based on target Transmission, downlink business is the data that base station sends to terminal.When base station and terminal carry out downlink traffic transmission, base station to Terminal sends downlink business, and base station can be by (English: Physical Downlink Shared at Physical Downlink Shared Channel Channel, is called for short PDSCH) in the reference signal (English: Reference Signal, to be called for short RS) that comprises destination channel is entered Row channel is estimated, and estimates the deadline that base station is transmitted, base station with user equipment downlink data (i.e. downlink business) according to channel It is estimated that the deadline of downlink traffic transmission.Reference signal RS that base station can be passed through to comprise in PDSCH is to target Before channel carries out channel estimation, performing LBT and measure, LBT measures the busy-idle condition for detecting above-mentioned destination channel, works as detection To above-mentioned destination channel be idle condition time, base station to terminal send reference signal RS carry out channel estimation, estimate above-mentioned target The quality of channel.Above-mentioned destination channel is the channel of unauthorized frequency range, and the operating frequency of the most above-mentioned destination channel is positioned at unauthorized In frequency range.

Transmitting element 302, is used for measuring target for periodically sending Sounding Reference Signal SRS, SRS to base station The channel quality of channel.

In the embodiment of the present invention, transmitting element 302 periodically can send Sounding Reference Signal SRS to base station, Wherein, SRS is for measuring the channel quality of destination channel.SRS in the embodiment of the present invention, can be periodic SRS, it is possible to To be acyclic SRS, wherein periodically SRS is (English: Radio Resource by wireless heterogeneous networks Control, RRC) configuration, configuration cycle is that { 2,5,10,20,20,80,160,320} milliseconds, acyclic SRS base station can To be sent by Downlink Control Information DCI format 0/4/1A triggering terminal.

Optionally, as it is shown on figure 3, terminal also includes the second reception unit 305.

Second receives unit 305, and for receiving the SRS configuration signal that base station sends, SRS configuration signal carries SRS configuration Parameter, SRS configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and sub-frame configuration parameter is for terminal configuration SRS's In the cycle, frequency domain configuration parameter is for the covering frequency band of terminal configuration SRS.

In the embodiment of the present invention, transmitting element 302 periodically send to base station Sounding Reference Signal SRS it Before, second receives unit 305 can receive base station by high-level signaling or Physical Downlink Control Channel (English: Physical Downlink Control Channel, is called for short PDCCH) the SRSSRS configuration signal that sends of signaling, and by broadcast channel (English Literary composition: Broadcast Channel, is called for short BCH) in community under broadcast them base station for the subframe of SRS transmission, wherein, SRS Configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter.Sub-frame configuration parameter is for the cycle of terminal configuration SRS, frequency domain Configuration parameter is for the covering frequency band of terminal configuration SRS.

Judging unit 303, for when needs send SRS to base station, it is judged that the deadline of downlink business and sending out of SRS Whether send the difference of time less than or equal to predetermined threshold value, SRS transmits based on destination channel, and SRS includes SRS.

In the embodiment of the present invention, when terminal needs to send SRS to base station, it is judged that unit 303 judges cutting of downlink business Only whether the difference sending the time of time and SRS is less than or equal to predetermined threshold value, and wherein, SRS transmits based on destination channel.Sentence Disconnected unit 303 judges whether the difference of the deadline of downlink business and the transmission time of SRS can less than or equal to predetermined threshold value Think: judging unit 303 judges whether last subframe of downlink business is less than with SRS distance in time-domain and presets threshold Value.Terminal sends SRS in order to destination channel is carried out uplink channel estimation to base station.In embodiments of the present invention, terminal is being sent out When sending SRS, when judging unit 303 judge in destination channel upper one transmission downlink business be currently needed for transmit SRS time Between interval less than or equal to predetermined threshold value time, it is not necessary to perform LBT measure, directly transmit SRS, it is possible to reduce perform LBT measure Number of times, improves data throughout.

Optionally, as it is shown on figure 3, terminal also includes determining unit 306.

Determine unit 306, for when needs to base station send PUSCH data time, determine PUSCH data the transmission time and Whether the interval sending the time of SRS is more than or equal to a period of sub-frame；Transmitting element 302, is additionally operable to when PUSCH data When the interval sending the time of transmission time and SRS is more than or equal to a period of sub-frame, SRS with PUSCH data are put respectively Entering in different subframes and send, and SRS is positioned on first symbol of SRS, SRS is the subframe comprising SRS.As Shown in Fig. 1 a, SRS is positioned on first symbol of SRS.Fig. 1 a is that disclosed in the embodiment of the present invention, a kind of subframe structure shows Being intended to, in Fig. 1 a, uplink service (including SRS) can include multiple subframe, owing to the time that sends of PUSCH data is with SRS's The interval of transmission time is more than or equal to a period of sub-frame, and uplink service includes SRS and do not includes PUSCH data, and SRS is positioned at In first subframe of uplink service, concrete, SRS may be located at any one single carrier frequency of first subframe of uplink service Divide multiple access (English: Single-carrier Frequency-Division Multiple Access, to be called for short SC-FDMA) symbol In number, SRS may be located in first SC-FDMA symbol of first subframe of uplink service, it is also possible to is positioned at uplink service First subframe last SC-FDMA symbol in, the difference sending the time of deadline of downlink business and SRS is little In or equal to predetermined threshold value, as shown in Figure 1a, predetermined threshold value can be 16 microseconds (us), downlink business and SRS are in time-domain Distance less than or equal to 16us.

Optionally, transmitting element 302, it is additionally operable to when the transmission time of PUSCH data and the interval sending the time of SRS are little In a period of sub-frame, SRS Yu PUSCH data are put in same subframe.SRS with PUSCH data (include at uplink service SRS and PUSCH data) same subframe in.As shown in Figure 1 b, Fig. 1 b is the embodiment of the present invention another subframe disclosed knot Structure schematic diagram, in Fig. 1 b, uplink service includes SRS and PUSCH data, wherein, same at uplink service of SRS with PUSCH data In one subframe, such as in first subframe of uplink service, SRS may be located at first in above-mentioned same subframe In SC-FDMA symbol, PUSCH data are positioned at before SRS, as shown in Fig. 1 b (1)；SRS can also be positioned at above-mentioned same subframe Last SC-FDMA symbol in, PUSCH data are positioned at after SRS, as shown in Fig. 1 b (2).The deadline of downlink business Being less than or equal to predetermined threshold value with the difference sending the time of SRS, as shown in Figure 1 b, predetermined threshold value can be 16 microseconds (us), Downlink business and SRS distance in time-domain are less than or equal to 16us.

Transmitting element 302, is additionally operable to, when difference is less than or equal to predetermined threshold value, not perform listem-before-talk LBT and measure, to Base station sends SRS.

Whether be in a kind of exemplary mode of idle condition as detection destination channel, concrete, UE can detect The most described destination channel of miscellaneous equipment around whether is had to send data.If this target channel is taken by miscellaneous equipment, Then continue to monitor；If after listening to the channel resource free time, then UE can busy channel immediately.Channel holding time is one to be fixed Value, can be pre-configured with, it is contemplated that equipment is sent to the transfer process of Channel Detection in data, can be at subsequent channels detecting position A silence period is set before putting.Additionally, it is preferred that, if after listening to the channel resource free time, a random number N can be generated and make For back off time, in this back off time, continue monitor channel, if n times channel clear being detected, then back off time knot Bundle, this UE just can take this destination channel and send data simultaneously.If be detected that channel status is busy (the most by it Its hold facility), then within this cycle equipment can not busy channel, then this UE can wait until the fixed position of next cycle Continue detection.

Whether being in, as detection destination channel, the mode that the another kind of idle condition is exemplary, concrete, UE is when there be industry The when that business arriving, trigger initial detecting.If initial detecting is idle to channel status, get final product busy channel, and pre-by equipment First one Channel holding time T of configuration；If initial detecting is busy to channel status, then can generate a postponement cycle (defer period) time, if channel busy still being detected cycle time postponing, then continue to generate one and postpone the cycle Time.Detector unit can be with busy channel after n times detection time detecting is the free time to channel status, and the busy channel time is T。

In the embodiment of the present invention, judge deadline and the difference sending the time of SRS of downlink business when judging unit 303 When value is less than or equal to predetermined threshold value, terminal is performed without LBT and measures, and transmitting element 302 directly sends SRS to base station, permissible Reduce and perform the number of times that LBT measures, improve data throughout.

Measuring unit 304, for when difference is more than predetermined threshold value, performs listem-before-talk LBT and measures, and LBT measurement is used for The busy-idle condition of detection destination channel.

Transmitting element 302, is additionally operable to when destination channel is idle condition, sends SRS to base station.

In the embodiment of the present invention, when the deadline of downlink business and the difference sending the time of SRS are more than predetermined threshold value Time, measuring unit 304 performs LBT and measures, and when LBT measurement destination channel is in idle condition, transmitting element 302 is sent out to base station Send SRS.Above-mentioned SRS includes periodic SRS, it is also possible to include acyclic SRS, can pass through SRS configuration parameter The transmission time of configuration SRS, when the time that sends of SRS is identical with the transmission time of PUSCH data, SRS Yu PUSCH data exist Send in same subframe, when the transmission time of SRS differed with the transmission time of PUSCH data, SRS Yu PUSCH data Do not send in same subframe.Implement the embodiment of the present invention, only when the time that sends of deadline of downlink business and SRS When difference is more than predetermined threshold value, performs LBT and measure, it is possible to reduce perform the number of times that LBT measures, improve data throughout.

Referring to Fig. 4, Fig. 4 is the structural representation of a kind of base station disclosed in the embodiment of the present invention.Embodiment of the present invention institute The base station described, including transmitting element 401, wherein:

Transmitting element 401, for when destination channel is idle condition, sends downlink business to terminal, and destination channel is The channel of unauthorized frequency range, downlink business transmits based on destination channel.

Wherein, when terminal needs to send periodic SRS to base station, terminal is for judging the deadline of downlink business Whether being less than or equal to predetermined threshold value with the difference sending the time of SRS, terminal is additionally operable to when difference is less than or equal to presetting threshold During value, do not perform listem-before-talk LBT and measure, send SRS to base station；Terminal is additionally operable to, when difference is more than predetermined threshold value, perform LBT Measuring, LBT measures the busy-idle condition for detecting destination channel；Terminal is additionally operable to when destination channel is idle condition, Xiang Ji Stand transmission SRS；Wherein, SRS is for measuring the channel quality of destination channel.In the embodiment of the present invention, when base station needs to terminal When sending downlink business, measuring unit 401 can first carry out LBT and measure, the busy-idle condition of detection destination channel, works as destination channel During for idle condition, transmitting element 401 sends downlink business to terminal, and destination channel is the channel of unauthorized frequency range, lower industry It is engaged in transmitting based on destination channel.Downlink business can be that Physical Downlink Shared Channel is (English: Physical Downlink Shared Channel, is called for short PDSCH) data, the reference signal comprised in PDSCH (English: Reference Signal, letter Claim RS), RS is for carrying out channel estimation to destination channel.

Optionally, transmitting element 401, it is additionally operable to send SRS configuration signal to terminal, SRS configuration signal carries SRS configuration Parameter, SRS configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and sub-frame configuration parameter is for terminal configuration SRS's In the cycle, frequency domain configuration parameter is for the covering frequency band of terminal configuration SRS.Wherein, base station sends SRS configuration signal to terminal, with Making terminal according to the sub-frame configuration parameter in SRS configuration signal and the transmission time of frequency domain configuration parameter configuration SRS, base station is permissible By the transmission time of SRS configuration signal configuration SRS, so that the deadline of downlink business and the difference sending the time of SRS Less than predetermined threshold value, reach to reduce the purpose performing LBT pendulous frequency.SRS configuration signal carries SRS configuration parameter, and SRS configures Parameter includes sub-frame configuration parameter and frequency domain configuration parameter.Wherein, in sub-frame configuration parameter, such as, FDD (English: Frequency Division Duplexing, is called for short FDD) in, send periodic SRS and meet following condition:

(10×n_f+K_SRS-T_offset)mod T_SRS=0；

In the embodiment of the present invention, base station can configure the transmission time of SRS by SRS configuration signal, so that downlink business Deadline and the difference sending the time of SRS less than predetermined threshold value, reach to reduce the purpose performing LBT pendulous frequency.

Wherein, SRS includes periodic SRS or acyclic SRS.

SRS in the embodiment of the present invention, can be periodic SRS, it is also possible to be acyclic SRS, wherein cycle Property SRS by wireless heterogeneous networks (English: Radio Resource Control, RRC) configuration, configuration cycle be 2,5, 10,20,20,80,160,320} milliseconds, Downlink Control Information DCI format 0/4/ can be passed through in acyclic SRS base station 1A triggering terminal sends.Optionally, terminal is additionally operable to, when terminal needs to send PUSCH data to base station, determine PUSCH data The interval sending the time sending time and SRS whether be more than or equal to a period of sub-frame.Terminal is additionally operable to when PUSCH number According to the interval sending the time sending time and SRS be more than or equal to a period of sub-frame time, SRS with PUSCH data are divided Do not put in different subframes and send；Wherein, SRS is positioned on first symbol of SRS, and SRS is the son comprising SRS Frame.SRS is positioned in first subframe of SRS.As shown in Figure 1a, Fig. 1 a is that disclosed in the embodiment of the present invention, a kind of subframe structure shows Being intended to, in Fig. 1 a, uplink service (including SRS) can include multiple subframe, owing to the time that sends of PUSCH data is with SRS's The interval of transmission time is more than or equal to a period of sub-frame, and uplink service includes SRS and do not includes PUSCH data, and SRS is positioned at In first subframe of SRS, concrete, any one single carrier frequency division of first subframe that SRS may be located at uplink service is many In location (English: Single-carrier Frequency-Division Multiple Access, to be called for short SC-FDMA) symbol, SRS may be located in first SC-FDMA symbol of first subframe of uplink service, it is also possible to is positioned at the first of uplink service In last SC-FDMA symbol of individual subframe, the difference sending the time of deadline of downlink business and SRS less than or etc. In predetermined threshold value, as shown in Figure 1a, predetermined threshold value can be 16 microseconds (us), downlink business and SRS distance in time-domain Less than or equal to 16us.

Implementing the terminal shown in Fig. 4, base station is after terminal sends downlink business, when terminal sends SRS to base station, as When really the difference sending the time of the deadline of downlink business and SRS is less than predetermined threshold value, then need not perform a LBT again and survey Amount, directly transmits SRS, it is possible to reduce perform the number of times that LBT measures.

Refer to the structural representation that Fig. 5, Fig. 5 are the embodiment of the present invention another terminals disclosed.Terminal shown in Fig. 5 Including at least one processor 501, at least one memory 502 and network interface 503, processor 501, memory 502 and net Network interface 503 is connected by communication bus 504, and processor 501 can be CPU, and memory 502 is used for storing operating system, net Network signal procedure, user interface program, transmission SRS program etc.；Network interface 503 is used for receiving and sending data.Memory 502 Can be high-speed RAM memory, it is also possible to be non-labile memory (non-volatile memory), for example, at least one Individual magnetic disc store.Memory 502 optionally can also is that at least one is located remotely from the storage device of aforementioned processor 501.

Memory 502 can be used for storing instruction and data, and memory 502 can mainly include storing instruction area and storage data District, wherein, storage instruction area can store the instruction etc. needed for operating system, at least one function；Above-mentioned instruction can make processor 502 perform following methods, and concrete grammar includes:

Receiving the downlink business that base station sends, downlink business transmits based on destination channel, and destination channel is unauthorized frequency range Channel；

Periodically send Sounding Reference Signal SRS, SRS to base station for measuring the channel quality of destination channel；

When needs send SRS to base station, it is judged that whether the difference of the deadline of downlink business and the transmission time of SRS Less than or equal to predetermined threshold value, SRS transmits based on destination channel；

If difference is less than or equal to predetermined threshold value, does not perform listem-before-talk LBT and measure, send SRS to base station；

If difference is more than predetermined threshold value, performing listem-before-talk LBT and measure, LBT measures the busy for detecting destination channel State；

When destination channel is idle condition, send SRS to base station.

Implement the terminal shown in Fig. 5, it is possible to reduce perform the number of times that LBT measures, improve data throughout.

Based on same inventive concept, owing to this terminal solves the principle of problem with the inventive method embodiment (as shown in Figure 1 Embodiment) in the method for transmission channel detection reference signal SRS similar, therefore the enforcement of this terminal may refer to method Implement, repeat no more in place of repetition.

Refer to the structural representation that Fig. 6, Fig. 6 are the embodiment of the present invention another base stations disclosed.Terminal shown in Fig. 6 Including at least one processor 601, at least one memory 602 and network interface 603, processor 601, memory 602 and net Network interface 603 is connected by communication bus 604, and processor 601 can be CPU, and memory 602 is used for storing operating system, net Network signal procedure, user interface program, transmission SRS program etc.；Network interface 603 is used for receiving and sending data.Memory 602 Can be high-speed RAM memory, it is also possible to be non-labile memory (non-volatile memory), for example, at least one Individual magnetic disc store.Memory 602 optionally can also is that at least one is located remotely from the storage device of aforementioned processor 601.

Memory 602 can be used for storing instruction and data, and memory 602 can mainly include storing instruction area and storage data District, wherein, storage instruction area can store the instruction etc. needed for operating system, at least one function；Above-mentioned instruction can make processor 602 perform following methods, and concrete grammar includes:

When destination channel is idle condition, sending downlink business to terminal, destination channel is the channel of unauthorized frequency range, Downlink business transmits based on destination channel；

Wherein, when terminal needs to send periodic SRS to base station, terminal is for judging the deadline of downlink business Whether being less than or equal to predetermined threshold value with the difference sending the time of SRS, terminal is additionally operable to when difference is less than or equal to presetting threshold During value, do not perform listem-before-talk LBT and measure, send SRS to base station；Terminal is additionally operable to, when difference is more than predetermined threshold value, perform LBT Measuring, LBT measures the busy-idle condition for detecting destination channel；Terminal is additionally operable to when destination channel is idle condition, Xiang Ji Stand transmission SRS；Wherein, SRS is for measuring the channel quality of destination channel.

Implement the base station shown in Fig. 6, it is possible to reduce perform the number of times that LBT measures, improve data throughout.

Based on same inventive concept, owing to this base station solves the principle of problem with the inventive method embodiment (as shown in Figure 2 Embodiment) in the method for transmission channel detection reference signal SRS similar, therefore the enforcement of this base station may refer to method Implement, repeat no more in place of repetition.

Module in all embodiments of the invention or submodule, can pass through universal integrated circuit, such as CPU (Central Processing Unit, central processing unit), or by ASIC (Application Specific Integrated Circuit, special IC) realize.

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 device 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, be permissible Instructing relevant hardware by computer program to complete, described program can be stored in a computer read/write memory medium In, 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 Dish, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (Random Access Memory, RAM) etc..

The above disclosed present pre-ferred embodiments that is only, can not limit the right model of the present invention with this certainly Enclose, the equivalent variations therefore made according to the claims in the present invention, still belong to the scope that the present invention is contained.

Claims

1. the method for a transmission channel detection reference signal SRS, it is characterised in that including:

Receiving the downlink business that base station sends, described downlink business transmits based on destination channel, and described destination channel is unauthorized The channel of frequency range；

Periodically send Sounding Reference Signal SRS, described SRS to described base station for measuring the letter of described destination channel Road quality；

When needs send described SRS to described base station, it is judged that during the transmission of deadline of described downlink business and described SRS Between difference whether less than or equal to predetermined threshold value, described SRS transmits based on described destination channel；

If described difference is more than described predetermined threshold value, performing described LBT and measure, described LBT measurement is used for detecting described target letter The busy-idle condition in road；

Method the most according to claim 1, it is characterised in that described periodically transmission to described base station detects with reference to letter Before number SRS, described method also includes:

Receiving the SRS configuration signal that base station sends, described SRS configuration signal carries SRS configuration parameter, described SRS configuration parameter Including sub-frame configuration parameter and frequency domain configuration parameter, described sub-frame configuration parameter configures the cycle of described SRS for described terminal, Described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

Method the most according to claim 1 and 2, it is characterised in that described method also includes:

When needs send PUSCH data to described base station, determine the transmission time of described PUSCH data and sending out of described SRS Whether the interval sending the time is more than or equal to a period of sub-frame, if the time that sends of described PUSCH data and sending out of described SRS Send the interval of time more than or equal to one period of sub-frame, described SRS is respectively put into different from described PUSCH data Sending in subframe, and described SRS is positioned on first symbol of SRS, described SRS is to comprise the son of described SRS Frame.

4. according to the method described in any one of claim 1-3, it is characterised in that described method also includes:

When needs send PUSCH data to described base station, if the transmission sending time and described SRS of described PUSCH data The interval of time is less than one period of sub-frame, is put in same subframe with described PUSCH data by described SRS.

Method the most according to claim 1 and 2, it is characterised in that when the SRS of different terminals needs in same subframe During upper transmission, described SRS uses comb structure, and wherein, the SRS of different terminals occupies the different sons of same subframe symbol and carries Ripple.

6. the method transmitting SRS, it is characterised in that including:

When destination channel is idle condition, sending downlink business to terminal, described destination channel is the channel of unauthorized frequency range, Described downlink business transmits based on described destination channel；

Wherein, when described terminal needs to send periodic SRS to base station, described terminal is for judging described downlink business Whether the difference sending the time of deadline and described SRS is less than or equal to predetermined threshold value, and described terminal is additionally operable to when described When difference is less than or equal to described predetermined threshold value, does not perform listem-before-talk LBT and measure, send described SRS to described base station；Described Terminal is additionally operable to, when described difference is more than described predetermined threshold value, perform described LBT and measure, described in described LBT measurements is used for detecting The busy-idle condition of destination channel；Described terminal is additionally operable to when described destination channel is idle condition, sends institute to described base station State SRS；Wherein, described SRS is for measuring the channel quality of described destination channel.

Method the most according to claim 6, it is characterised in that described before terminal sends downlink business, described method Also include:

Sending SRS configuration signal to described terminal, described SRS configuration signal carries SRS configuration parameter, described SRS configuration parameter Including sub-frame configuration parameter and frequency domain configuration parameter, described sub-frame configuration parameter configures the cycle of described SRS for described terminal, Described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

8. according to the method described in claim 6 or 7, it is characterised in that

Described terminal is additionally operable to, when described terminal needs to send PUSCH data to described base station, determine described PUSCH data Whether the interval sending the time of transmission time and described SRS is more than or equal to a period of sub-frame；

Described terminal be additionally operable to when transmission time of described PUSCH data and described SRS the interval sending the time more than or etc. When one period of sub-frame, described SRS is respectively put in different subframes from described PUSCH data transmission；Wherein, institute Stating SRS to be positioned on first symbol of SRS, described SRS is the subframe comprising described SRS.

Method the most according to claim 8, it is characterised in that

Described terminal is additionally operable to when the transmission time of described PUSCH data and the interval sending the time of described SRS are less than described During one period of sub-frame, described SRS is put in same subframe with described PUSCH data.

10. according to the method described in claim 6 or 7, it is characterised in that when the SRS of different terminals needs at same height When sending on frame, described SRS uses comb structure, and wherein, the SRS of different terminals occupies the different sons of same subframe symbol Carrier wave.

11. 1 kinds of terminals, it is characterised in that including:

Transmitting element, is used for measuring institute for periodically sending Sounding Reference Signal SRS, described SRS to described base station State the channel quality of destination channel；

Judging unit, for when described transmitting element needs to send described SRS to described base station, it is judged that described downlink business Whether the difference sending the time of deadline and described SRS is less than or equal to predetermined threshold value, and described SRS believes based on described target Road transmits；

Described transmitting element, is additionally operable to, when described difference is less than or equal to described predetermined threshold value, not perform listem-before-talk LBT and survey Amount, sends described SRS to described base station；

Measuring unit, for when described difference is more than described predetermined threshold value, performs described LBT and measures, and described LBT measurement is used for Detect the busy-idle condition of described destination channel；

12. terminals according to claim 11, it is characterised in that described terminal also includes:

Second receives unit, and for receiving the SRS configuration signal that base station sends, described SRS configuration signal carries SRS configuration ginseng Number, described SRS configuration parameter includes sub-frame configuration parameter and frequency domain configuration parameter, and described sub-frame configuration parameter is used for described terminal Configuring the cycle of described SRS, described frequency domain configuration parameter configures the covering frequency band of described SRS for described terminal.

13. according to the terminal described in claim 11 or 12, it is characterised in that described terminal also includes:

Determine unit, for when needs send PUSCH data to described base station, determining the transmission time of described PUSCH data And whether the interval sending the time of described SRS is more than or equal to a period of sub-frame；

Described transmitting element, is additionally operable to when the transmission time of described PUSCH data and the interval sending the time of described SRS are more than Or during equal to one period of sub-frame, described SRS is respectively put in different subframes from described PUSCH data transmission, and And described SRS is positioned on first symbol of SRS, described SRS is the subframe comprising described SRS.

14. according to the terminal described in any one of claim 11-13, it is characterised in that

Described transmitting element, is additionally operable to when needing to send PUSCH data to described base station, and during the transmission of described PUSCH data Between and described SRS send the time interval less than one period of sub-frame time, described SRS is put with described PUSCH data Enter in same subframe.

15. according to the terminal described in claim 11 or 12, it is characterised in that when the SRS of different terminals needs same When sending in subframe, described SRS uses comb structure, and wherein, the SRS of different terminals occupies the difference of same subframe symbol Subcarrier.

16. 1 kinds of base stations, it is characterised in that including:

Transmitting element, for when destination channel is idle condition, sends downlink business to terminal, and described destination channel is non-awarding The channel of power frequency range, described downlink business transmits based on described destination channel；

17. base stations according to claim 16, it is characterised in that described transmitting element, are additionally operable to send to described terminal SRS configuration signal, described SRS configuration signal carries SRS configuration parameter, described SRS configuration parameter include sub-frame configuration parameter and Frequency domain configuration parameter, described sub-frame configuration parameter configures the cycle of described SRS for described terminal, and described frequency domain configuration parameter is used The covering frequency band of described SRS is configured in described terminal.

18. according to the base station described in claim 16 or 17, it is characterised in that

19. base stations according to claim 18, it is characterised in that

20. according to the base station described in claim 16 or 17, it is characterised in that when the SRS of different terminals needs same When sending in subframe, described SRS uses comb structure, and wherein, the SRS of different terminals occupies the difference of same subframe symbol Subcarrier.