CN105050190B - Based on the discovery reference signal configuration method, apparatus of unauthorized frequency range and base station - Google Patents
Based on the discovery reference signal configuration method, apparatus of unauthorized frequency range and base station Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of configuration methods of discovery reference signal based on unauthorized frequency range, including：The DRS transmission period of discovery reference signal DRS to be transmitted is configured in subframe；N number of CCA period is configured in the subframe；Wherein, N >=1 and be integer, N number of CCA period is located at before the DRS transmission period.The embodiment of the invention also discloses a kind of configuration device and base stations.Using the present invention, suitable DRS can be selected to send the position of position and CCA period, improve and send success rate.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of discovery reference signal configuration method based on unauthorized frequency range,
Device and base station.
Background technique
With the sharp increase of message volume, 3GPP (3rd Generation Partnership Project, third
For partner program) authorize frequency spectrum to seem less and less adequate to provide higher network capacity.In order to further increase frequency spectrum
The utilization of resource, 3GPP is just discussing how unlicensed spectrum is used with the help of authorizing frequency spectrum, such as 2.4GHz and 5GHz frequency range.
These unlicensed spectrums are presently mainly WiFi (Wireless Fidelity, Wireless Fidelity) bluetooth, radar, the systems such as medical treatment
It is using.It in general, is the access technology of the design of authorized spectrum band, as (Long Term Evolution, is drilled LTE for a long time
Into) be not suitable for using in unauthorized frequency range, because of the requirement that this kind of access technology of LTE optimizes spectrum efficiency and user experience
It is very high.However, carrier wave polymerizable functional allows and LTE is deployed in unauthorized frequency range becomes possible.3GPP proposes LAA (LTE
The access of Assisted Access, LTE auxiliary) concept, the help by LTE authorization frequency spectrum comes using unlicensed spectrum.And not
Authorize frequency spectrum can be there are two types of working method, one is supplements downlink (SDL, Supplemental Downlink), that is, under only having
Row transmission subframe；Another kind is TDD (Time Division Duplexing, time division duplex) mode, and uplink and downlink all transmits subframe
All include.Supplementing downlink such case can only use by carrier aggregation technology.And tdd mode can be by DC (Dual
Connectivity, dual link) it uses, it can also independently use.It is illustrated in fig. 1 shown below.
Compared to WiFi, works and have the ability to provide higher spectrum efficiency and bigger covering effect in the LTE of unauthorized frequency range
Fruit, while data traffic seamless switching between authorized spectrum band and unauthorized frequency range is allowed based on the same core net.User is come
It says, it means that better broadband experience, higher rate, better stability and mobile convenience.
The existing access technology used in unlicensed spectrum, such as WiFi have weaker anti-interference ability.In order to keep away
Exempt to interfere, WiFi system devises many interference and avoids rule, such as CSMA/CA ((Carrier Sense Multiple
Access/Collision Detection, i.e. csma/collision detection method).The original substantially of this method
Reason is that either terminal wants first Monitor detection before sending signaling or data by the AP (Access Point, access point) of WiFi
Whether surrounding has AP or terminal in transmission/reception signaling or data, if so, then continuing to monitor, is not until listening to
Only.If it is not, generating a random number as back off time, in this back off time, if not detected signaling
Or data transmission, then AP or terminal can start to send signaling or data after back off time terminates.And in LTE network
Due to there is good orthogonality to ensure that interference level, so the downstream transmission of base station and user do not have to consider whether surrounding has
Base station or user are being transmitted.If whether LTE has other equipment to exist around also not considering when using in unauthorized frequency range
Using unauthorized frequency range, then great interference will be brought to WiFi equipment.Because LTE is transmitted as long as having business, do not have
There is any monitoring rule, then WiFi equipment cannot just be transmitted when LTE has business transmission, can only be transferred until LTE business
At can just detect channel clear, just can be carried out transmission.
So LTE, when using unauthorized frequency range, one of most important key point is to ensure that LAA can be fair close friend's
On the basis of and existing access technology (such as WiFi) coexist.And there is no LBT (Listen Before in traditional LTE system
Talk, listem-before-talk) mechanism avoid collision.In order to preferably coexist with WiFi, LTE needs a kind of LBT mechanism.In this way,
LTE, if detecting channel busy, cannot occupy the frequency range in unlicensed spectrum, if detecting the channel spare time, could occupy.
The LBT mechanism of FBE based on the motion design before us, green slice are CCA Channel Detection Time, CCA inspection
It surveys time (duration about 20us) and is repeated cyclically appearance, if detecting channel idle, busy channel is in channel occupancy
Between reach maximum channel holding time after, have an idle time, in the idle time, sending point does not send signal and data,
Channel is seized convenient for other sending points.After the idle time, and there is CCA detection time, if detecting channel busy, does not account for
With channel, channel is detected again when the CCA detection time in next period occurs.When Channel Detection Time also belongs to idle
Between, idle duration has to be larger than the 5% of channel maximum holding time.The Idle time adds channel occupancy maximum time, that is, period.
LBT mechanism based on LBE：The LBT mechanism of LBE is no periodic, as long as business reaches, triggers initial CCA inspection
It surveys time (duration about 34us), if CCA detection is idle, sends signaling or data at once；If detecting channel busy, open
It opens the defer period time, and is detecting that it is (lasting that idle time of channel persistently reaches the defer period time again
Time about 34us) after, then taking the value range of random number a M, M is 1 to q, and the value range of q is that 4 to 32. Fig. 4 are shown
Be q=16 the case where, at this moment, when detecting channel idle, M-1, as M=0, send data, and channel maximum occupy
Time is (13/32) * q=6.5ms.Then after 6.5ms, take Extended CCA mechanism (when ECCA detection time continues
Between about 9us), i.e., and the range of random value M, M be 1 to 16, if value be 8, then it represents that in next ECCA
In (Extended Clear Channel Assessment, the idle-channel evaluation of extension) detection time, each ECCA detection
Time will detect channel, if detecting channel idle, M-1, if detecting channel busy, M is constant, and detect again
After persistently reaching defer period time (duration about 34us) to idle time of channel, it could be detected again with ECCA
Time granularity detects channel, and when detecting channel idle, M, which can just be started again at, to successively decrease, and when M is 0, sends signaling or number
According to.The reference signal for RRM measurement/cell identification/down-going synchronous/time-frequency estimation etc. of LAA is possible to real in two ways
It is existing：One is short control signaling, the requirement that this mode needs to meet is that can have in 50ms
5% time is sending, that is, 2.5ms.Another kind is to send aperiodic DRS, because DRS, which is sent, occupies 6ms (DMTC：
The configuration of DRS Measurement Timing Configuration, DRS time of measuring) time, and if detecting letter
Road busy is also sent, and biggish interference will be brought to other systems, so if it is DRS (Discovery Reference is sent
Signal, find reference signal), just can only the transmission when detecting channel idle, then can only be just aperiodic.
In current LTE communication system, the position and the position of CCA period for sending DRS determine not yet how
It is the hot spot studied at present that suitable position, which is selected, as the transmission period of DRS and CCA period.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that providing a kind of discovery reference letter based on unauthorized frequency range
Number configuration method, device and base station.Suitable position can be determined for DRS transmission period and CCA period, improve transmission DRS
Success rate.
In order to solve the above-mentioned technical problem, the discovery based on unauthorized frequency range that the embodiment of the invention provides a kind of is with reference to letter
Number configuration method, including：
The DRS transmission period of discovery reference signal DRS to be transmitted is configured in subframe；
N number of CCA period is configured in the subframe；Wherein, N >=1 and be integer, N number of CCA period is located at institute
It states before DRS transmission period.
Correspondingly, the embodiment of the invention also provides a kind of configuration of discovery reference signal based on unauthorized frequency range dresses
It sets, including：
First configuration module, for configuring the DRS transmission period of discovery reference signal DRS to be transmitted in subframe；
Second configuration module, for configuring N number of CCA period in the subframe；Wherein, N >=1 and be integer, the N
A CCA period is located at before the DRS transmission period.
Correspondingly, the embodiment of the invention also provides a kind of base station, including above-mentioned configuration device.
Implement the embodiment of the present invention, has the advantages that：
Base station is configured to transmission period and at least one CCA period of transmission DRS in subframe, at least one
The CCA period is located at before DRS transmission period, and such base station can be before sending DRS to be transmitted within the CCA period
Channel status is detected according to preset strategy, DRS is then sent in DRS transmission period, improves the success rate that DRS is sent.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of the detection method of existing unauthorized band channels；
Fig. 2 is a kind of configuration method for discovery reference signal based on unauthorized frequency range that first embodiment of the invention provides
Flow diagram；
Fig. 3 a is a kind of configuration side for discovery reference signal based on unauthorized frequency range that second embodiment of the invention provides
The flow diagram of method；
Fig. 3 b is the modularization design figure of the discovery reference signal of Fig. 3 a；
Fig. 4 a is a kind of configuration side for discovery reference signal based on unauthorized frequency range that third embodiment of the invention provides
The flow diagram of method；
Fig. 4 b is the modularization design figure of the discovery reference signal of Fig. 4 a；
Fig. 5 a is a kind of configuration side for discovery reference signal based on unauthorized frequency range that fourth embodiment of the invention provides
The flow diagram of method；
Fig. 5 b is the modularization design figure of the discovery reference signal of Fig. 5 a；
Fig. 6 is a kind of knot of the configuration device of discovery reference signal based on unauthorized frequency range provided in an embodiment of the present invention
Structure schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to fig. 2, a kind of configuration side of the discovery reference signal of the unauthorized frequency range provided for first embodiment of the invention
The flow diagram of method, in embodiments of the present invention, the method includes：
S201, the DRS transmission period that discovery reference signal DRS to be transmitted is configured in subframe.
Specifically, DRS includes a variety of downlink reference signals, for RRM measurement, cell identification, down-going synchronous, time-frequency estimation
Deng, such as：DRS includes：One of SSS, PSS, CRS and CSI-RS or multiple.DRS transmission period be preset length when
Between section, for transmitting DRS.In LTE communication system, a radio frames include 10 subframes, and base station is configuring DRS to be transmitted
DRS transmission period when, can be configured in one or more subframes, DRS transmission period is in each subframe
Position be it is fixed, only one DRS transmission period is successfully transmitted DRS to be transmitted in a radio frame.
Each subframe includes that 14 symbol can basis when base station configures DRS transmission period in LTE communication system
The data volume of DRS to be transmitted determines symbol quantity and the position symbol from 14 symbol, for example, the in subframe the 4th
A symbol to the 7th symbol is as the 5th symbol to the 10th in the DRS transmission period or subframe of DRS to be transmitted
DRS transmission period of the symbol as DRS to be transmitted.
S202, N number of CCA period is configured in the subframe；Wherein, N >=1 and be integer.
Specifically, the CCA period indicates the time interval of preset length, for monitoring unauthorized band channels as idle shape
State or busy condition.N number of CCA period is configured in the subframe where DRS transmission period, wherein N number of CCA time section
It before DRS transmission period, and cannot be overlapped with DRS transmission period, N is the integer more than or equal to 1.If N > 1,
The duration of multiple CCA periods can be equal or unequal, and the present invention is with no restriction.
Optionally, when N=1, the duration of 1 CCA period was the first duration；
N>When 1, N number of CCA period includes initial CCA period, enhancing channel idle detection ECCA period, institute
N number of CCA period is stated equipped with the delay defer period period；Wherein, when first duration, the initial CCA
Between duration of section, the defer period period duration be the ECCA period duration it is whole
Several times.
Specifically, the length that base station configures the CCA period was the first duration when N=1；When N > 1, base station configuration
N number of CCA period includes initial CCA period, ECCA period, and when N number of CCA period is equipped with defer period
Between section, wherein the initial CCA period is the first CCA period, and the ECCA period is except the time after the first CCA period
Section, defer period period are busy to listen to unauthorized band channels within initial CCA period or ECCA period
When commonplace state, the increased period before next ECCA period.Base station meets in the duration for configuring the above-mentioned period：The
One duration, the duration of initial CCA period, defer period period duration be the ECCA period
The integral multiple of duration.
Implement the embodiment of the present invention, base station is configured to transmit the transmission period of DRS and at least one in subframe
CCA period, at least one CCA period are located at before DRS transmission period, and such base station can be to be transmitted in transmission
Channel status is detected according to preset strategy within the CCA period before DRS, then sends DRS in DRS transmission period,
Improve the success rate that DRS is sent.
Referring to Fig. 3 a, a kind of discovery reference signal configuration based on unauthorized frequency range provided for second embodiment of the invention
The flow diagram of method, in embodiments of the present invention, the method includes：
S301, the DRS transmission period that discovery reference signal DRS to be transmitted is configured in subframe.
Specifically, a radio frames of LTE communication system include 10 subframes, each subframe includes two slot s lot,
Each time slot includes 7 symbol, i.e., 1 subframe includes 14 symbol.DRS for realizing RRM measurement, down-going synchronous, when
Frequency estimation etc. functions, DRS include one of a plurality of types of downlink reference signals, such as PSS, SSS, CRS and CSI-RS or
It is a variety of.DRS transmission period is the time interval of the preset length in subframe, for sending DRS to be transmitted.Base station is in subframe
The DRS transmission period for configuring DRS to be transmitted is specially：Determine the position Symbol that DRS to be transmitted is occupied in subframe and
Symbol quantity.For example, the period to be transmitted is the time interval of the 4th symbol to the 7th symbol composition, 4 are occupied altogether
A symbol；Or the period to be transmitted is the time interval of the 5th symbol to the 10th symbol composition, occupies 6 altogether
symbol。
S302, N number of CCA period is configured in the subframe；The finish time of wherein N=1,1 CCA period are overlapped
At the time of the DRS transmission period.
Specifically, N=1, base station configures 1 CCA period in subframe, and the finish time of the CCA period coincides with
The initial time of the DRS transmission period of S301 configuration.
S303, listened within 1 CCA period unauthorized band channels be idle state when, the DRS pass
The DRS to be transmitted is sent in the defeated period.
Specifically, the CCA period is the time interval of preset length, for monitoring the state of unauthorized band channels, base
It stands and measures the received signal power of unauthorized band channels within the CCA period, when received signal power is less than predetermined power,
Show that unauthorized band channels are idle state within the CCA period, conversely, then showing unauthorized band channels in the CCA time
It is busy condition in section.It is idle state that base station listens to unauthorized band channels within 1 CCA period that S302 is configured
When, DRS to be transmitted is sent in the DRS transmission period of S301 configuration.
Optionally, when base station needs to send downlink data, the data transmission period section of downlink data to be transmitted is obtained,
In the case that the initial time of DRS transmission period is located in data transmission period section, CCA testing process is not executed, it is directly logical
It crosses DRS transmission period and sends DRS to be transmitted.
Specifically, downlink data does not include DRS, base station obtains unauthorized band channels by CCA mechanism or ECCA mechanism
The right to use after, occupy unauthorized band channels regular hour length, which is corresponding the present embodiment
Data transmission period section, for sending downlink data to be transmitted.For example, being triggered under LBE when base station needs to send downlink data
CCA mechanism determines the number of downlink data to be transmitted when detecting that unauthorized band channels are idle state within the CCA period
According to transmission period, the maximum duration of data transmission period section is 6.5ms (when q=16)；When base station needs to transmit downlink
When data, listened within the initial CCA period unauthorized band channels be busy condition when, take random number a M, 1≤M≤
Q, 4≤q≤32, it is subsequent often detect unauthorized band channels be idle state when, the value of M subtracts 1, in M=0, determines to be passed
The data transmission period section of defeated downlink data, the maximum duration of data transmission period section are 6.5ms；Wherein when first CCA
Between section be the initial CCA period, it is subsequent except the first CCA period be the ECCA period, the duration of each ECCA period
Less than the duration of initial CCA period；When the initial CCA or ECCA period detect unauthorized band channels be it is busy
When state, M value is constant, and needs to increase preset duration before next ECCA period, which is more than or equal to defer
Period, only when being continuously detected idle time of channel and reaching defer period value, when could be detected again with ECCA
Between granularity carry out Channel Detection, if detecting channel idle in the ECCA time, M, which is started again at, to successively decrease.Defer period can be with
It is set as 0.
The above-mentioned data transmission period section that can be seen that occupies multiple subframes, and the duration is much larger than DRS transmission period
Duration, if the initial time of the DRS transmission period of S301 configuration is the data transmission period positioned at downlink data
In section, then unauthorized band channels are necessarily idle state in DRS transmission period, therefore are not needed in DRS transmission period
CCA flow journey is executed before, can directly transmit DRS in DRS transmission period.
Illustratively, referring to Fig. 3 b, the discovery based on unauthorized frequency range of the embodiment of the present invention is joined below according to Fig. 3 b
The configuration method for examining signal is described in detail, and a radio frames include 10 subframes, each subframe packet in LTE communication system
14 symbol are included, base station configures DRS transmission period in subframe 4, and DRS transmission period occupies the 4th symbol to the 7th
A symbol, base station configure 1 CCA period in subframe 4, and the finish time of CCA period coincides with DRS transmission period
Initial time.Base station listened within the CCA period unauthorized band channels be idle state when, in DRS transmission period
It is interior to send DRS to be transmitted.
A referring to fig. 4 is a kind of matching for discovery reference signal based on unauthorized frequency range that third embodiment of the invention provides
The flow diagram of method is set, in embodiments of the present invention, the method includes：
S401, the DRS transmission period that discovery reference signal DRS to be transmitted is configured in subframe.
Specifically, a radio frames of LTE communication system include 10 subframes, each subframe includes two slot s lot,
Each time slot includes 7 symbol, i.e., 1 subframe includes 14 symbol.DRS for realizing RRM measurement, down-going synchronous, when
The functions such as frequency estimation, DRS includes a plurality of types of downlink reference signals, for example, DRS includes in PSS, SSS, CRS and CSI-RS
It is one or more.DRS transmission period is the time interval of preset length in subframe, and the length of DRS transmission period depends on
It is directly proportional to the data volume of DRS to be transmitted in the data volume of DRS to be transmitted.Base station configures the DRS of DRS to be transmitted in subframe
Transmission period is specially：Determine the position symbol and symbol quantity that DRS to be transmitted is occupied in subframe.For example, to be passed
The defeated period is the time interval of the 4th symbol to the 7th symbol composition, occupies 4 symbol altogether；Or the time to be transmitted
The time interval of Duan Wei 5 symbol to the 10th symbol composition, occupies 6 symbol altogether.
S402, N number of CCA period is configured in the subframe；Wherein, N=1.
Specifically, N=1, base station configures 1 CCA period in subframe, and the DRS that is located at of 1 CCA period is transmitted
Before period.
S403, it configures and uses between the finish time of 1 CCA period and the initial time of the DRS transmission period
In the specified signal transmission time section for transmitting specified signal.
Specifically, specified signal transmission time section is used for transmission specified signal, specified signal includes initial signal initial
Signal or preserved signal reservation signal, specifying signal transmission time section is the time interval of preset length,
Between 1 CCA transmission period of S402 configuration and the DRS transmission period of S401 configuration, i.e., when specified signal transmits
Between the initial time of section coincide with finish time of CCA transmission period, specify the finish time of signal transmission time section to be overlapped
In the initial time of DRS transmission period.
S404, listened within 1 CCA period unauthorized band channels be idle state when, pass through the finger
Determine signal transmission time section and send the specified signal, and the DRS to be transmitted is sent by the DRS transmission period.
Specifically, the CCA period is the time interval of preset length, for monitoring the state of unauthorized band channels, base
It stands and measures the received signal power of unauthorized band channels in the CCA period, if received signal power is less than predetermined power, show
Unauthorized band channels are idle state, conversely, then showing that unauthorized band channels are busy condition.Base station is configured in S402
Listened in 1 CCA period unauthorized band channels be idle state when, in specified signal transmission time section send specify
Signal sends DRS to be transmitted to user equipment at the end of specifying signal transmission time section in DRS transmission period.
Optionally, the duration for specifying signal transmission time section is the minimum value for meeting the transmission conditions of specified signal.
Optionally, when base station needs to send downlink data, the data transmission period section of downlink data to be transmitted is obtained,
In the case that the initial time of DRS transmission period is located in data transmission period section, CCA testing process is not executed, it is directly logical
It crosses DRS transmission period and sends DRS to be transmitted.
Specifically, downlink data does not include DRS, base station obtains unauthorized band channels by CCA mechanism or ECCA mechanism
The right to use after, occupy unauthorized band channels regular hour length, which is corresponding the present embodiment
Data transmission period section, for sending downlink data to be transmitted.For example, triggering LBE's when base station needs to send downlink data
CCA mechanism determines downlink data to be transmitted when detecting that unauthorized band channels are idle state within the initial CCA period
Data transmission period section, maximum duration of data transmission period section is 6.5ms (when q=16)；When base station needs to transmit
When downlink data, when unauthorized band channels are listened within the initial CCA period is busy condition, a random number M is taken, 1
≤ M≤q, 4≤q≤32, it is subsequent often detect unauthorized band channels be idle state when, the value of M subtracts 1, in M=0, determine
The data transmission period section of downlink data to be transmitted, the maximum duration of data transmission period section are 6.5ms；It is wherein first
The CCA period is the initial CCA period, and subsequent except the first CCA period is the ECCA period, each ECCA period continues
Time is less than the duration of initial CCA period；When detecting that unauthorized band channels are in the initial CCA or ECCA period
When busy condition, need to increase preset duration before next ECCA period, which is more than or equal to defer period,
Only when being continuously detected idle time of channel and reaching defer period value, could again with ECCA detection time granularity into
Row Channel Detection, if detecting channel idle in the ECCA time, M, which is started again at, to successively decrease.Defer period can be set to 0.
The above-mentioned data transmission period section that can be seen that occupies multiple subframes, and the duration is much larger than DRS transmission period
Duration, if the initial time of the DRS transmission period of configuration is in data transmission period section positioned at downlink data,
Then unauthorized band channels are necessarily idle state in DRS transmission period, therefore do not need to hold before DRS transmission period
Row CCA flow journey, does not send specified signal, can directly transmit DRS in DRS transmission period.
Illustratively, b referring to fig. 4 joins the discovery based on unauthorized frequency range of the embodiment of the present invention below according to Fig. 4 b
The configuration method for examining signal is described in detail, and a radio frames include 10 subframes, each subframe packet in LTE communication system
14 symbol are included, base station configures DRS transmission period in subframe 4, and DRS transmission period occupies the 4th symbol to the 7th
A symbol, base station configure 1 CCA period and specified signal transmission time section in subframe 4, specify signal transmission time section
The 2nd symbol and the 3rd symbol is occupied, the finish time of CCA period coincides with rising for specified signal transmission time section
Begin the moment.Base station listened within the CCA period unauthorized band channels be idle state when, in specified signal transmission time section
It sends in specified signal and DRS transmission period and sends DRS to be transmitted.
Implement the embodiment of the present invention, base station is configured to transmit the transmission period of DRS and at least one in subframe
CCA period, at least one CCA period are located at before DRS transmission period, and such base station can be to be transmitted in transmission
Channel status is detected according to preset strategy within the CCA period before DRS, then sends DRS in DRS transmission period,
Improve the success rate that DRS is sent.
It is a kind of configuration side of the discovery reference signal based on unauthorized frequency range provided in an embodiment of the present invention referring to Fig. 5 a
The flow diagram of method, in embodiments of the present invention, the method includes：
S501, the DRS transmission period that discovery reference signal DRS to be transmitted is configured in subframe.
Specifically, specifically, a radio frames of LTE communication system include 10 subframes, when each subframe includes two
Gap slot, each time slot include 7 symbol, i.e., 1 subframe includes 14 symbol.DRS is for realizing RRM measurement, downlink
Functions, the DRS such as synchronous, time-frequency estimation include a plurality of types of downlink reference signals, for example, DRS include PSS, SSS, CRS and
One of CSI-RS or a variety of.DRS transmission period is the time interval of preset length in subframe, DRS transmission period
Length depends on the data volume of DRS to be transmitted, directly proportional to the data volume of DRS to be transmitted.Base station configures to be transmitted in subframe
The DRS transmission period of DRS is specially：Determine the position symbol and symbol quantity that DRS to be transmitted is occupied in subframe.Example
Such as, the period to be transmitted is the time interval of the 4th symbol to the 7th symbol composition, occupies 4 symbol altogether；Or to
Transmission period is the time interval of the 5th symbol to the 10th symbol composition, occupies 6 symbol altogether.
S502, N number of CCA period is configured in the subframe；Wherein, N > 1.
Specifically, base station configures multiple CCA periods in subframe, wherein the duration of each CCA period can be with
Identical or not identical, the duration of CCA period depends on the CCA mechanism that base station uses.N number of CCA period is located at DRS biography
Before the defeated period.
S503, match between the finish time of N number of CCA period and the initial time of the DRS transmission period
Set the specified signal transmission time section for being used for transmission specified signal.
Specifically, specified signal transmission time section is used for transmission specified signal, specified signal includes initial signal initial
Signal or preserved signal reservation signal, specifying signal transmission time section is the time interval of preset length,
Between N number of CCA transmission period of S402 configuration and the DRS transmission period of S401 configuration, i.e., when specified signal transmits
Between the initial time of section coincide with finish time of N number of CCA transmission period, specify the finish time weight of signal transmission time section
Together in the initial time of DRS transmission period.
S504, listened within N number of CCA period unauthorized band channels be idle state number reach default
When number, the not used CCA period in N number of CCA period is determined.
Specifically, when using LBE mechanism, if base station detects that unauthorized band channels are busy in the initial CCA period
Commonplace state then triggers ECCA testing process.Take random number M, 1≤M≤q, 4≤q≤32, subsequent inspection every within the ECCA time
Measure unauthorized band channels be idle state when, the value of M subtracts 1.If detecting channel busy, M is constant, and opens defer
The period time could be examined again with ECCA when only detecting that the channel idle duration reaches the defer period time
It surveys the time and detects channel, if M, which can just be started again at, to successively decrease when detecting channel idle within the ECCA time, when M=0, could send
Data.And here when detecting that channel idle means that M is decremented to 0.Namely as M=0, i.e., count value reaches default
When number, the not used CCA period in N number of CCA period is determined.For example, base station is configured with 16 CCA periods, base station
Channel busy is detected in the initial CCA period, opens deferperiod, and configure random number M value and take 8, base station is successively each
The state that unauthorized band channels are monitored in the ECCA period, as M=0, when determining that the current ECCA period is the 12nd CCA
Between section, then the not used CCA period is the 13rd to the 16th CCA period, and totally 4 CCA periods are not used, wherein not making
4 CCA periods are the ECCA period.
S505, the specified letter is sent by the not used CCA period and the specified signal transmission time section
Number, and the DRS to be transmitted is sent by the DRS transmission period.
Specifically, base station passes through the specified signal transmission time that configures in not used CCA period in S504 and S503
Section transmits specified signal, and sends DRS to be transmitted by DRS transmission period.
For example, base station determines that the not used CCA period is the 13rd to the 16th CCA period, base station passes through above-mentioned 4
CCA period and specified signal transmission time section send specified signal, send DRS to be transmitted by DRS transmission period.
Optionally, the duration for specifying signal transmission time section is the minimum value for meeting the transmission conditions of specified signal.
Optionally, when base station needs to send downlink data, the data transmission period section of downlink data to be transmitted is obtained,
In the case that the initial time of DRS transmission period is located in data transmission period section, CCA testing process is not executed, it is directly logical
It crosses DRS transmission period and sends DRS to be transmitted.
Specifically, downlink data does not include DRS, base station obtains unauthorized band channels by CCA mechanism or ECCA mechanism
The right to use after, occupy unauthorized band channels regular hour length, which is corresponding the present embodiment
Data transmission period section, for sending downlink data to be transmitted.For example, triggering LBE's when base station needs to send downlink data
CCA mechanism determines downlink data to be transmitted when detecting that unauthorized band channels are idle state within the initial CCA period
Data transmission period section, maximum duration of data transmission period section is 6.5ms (when q=16)；When base station needs to transmit
When downlink data, listened within the CCA period unauthorized band channels be busy condition when, take random number a M, 1≤M≤
Q, 4≤q≤32, it is subsequent often detect unauthorized band channels be idle state when, the value of M subtracts 1, in M=0, determines to be passed
The data transmission period section of defeated downlink data, the maximum duration of data transmission period section are 6.5ms；Wherein when first CCA
Between section be the initial CCA period, it is subsequent except the first CCA period be the ECCA period, the duration of each ECCA period
Less than the duration of initial CCA period；When the initial CCA or ECCA period detect unauthorized band channels be it is busy
It when state, needs to increase preset duration before next ECCA period, which is more than or equal to defer period, only
When being continuously detected idle time of channel and reaching defer period value, letter could be carried out with ECCA detection time granularity again
Road detection, if detecting channel idle in the ECCA time, M, which is started again at, to successively decrease.Defer period can be set to 0.
The above-mentioned data transmission period section that can be seen that occupies multiple subframes, and the duration is much larger than DRS transmission period
Duration, if the initial time of the DRS transmission period of configuration is in data transmission period section positioned at downlink data,
Then unauthorized band channels are necessarily idle state in DRS transmission period, therefore do not need to hold before DRS transmission period
Row CCA flow journey, does not send specified signal, can directly transmit DRS in DRS transmission period.
It should be noted that base station listens to unauthorized frequency within the CCA period when base station needs to send downlink data
Duan Xindao is idle state, if the duration between the initial time of the CCA period and the finish time of DRS transmission period
When less than certain threshold value, no need to send specified signal before sending downlink data, downlink data is directly transmitted.That is
DRS is sent when terminating duration less than certain threshold values, and downlink data starts to send, then downlink data can not send before sending and refer to
Determine signal.
Illustratively, referring to Fig. 5 b, the discovery based on unauthorized frequency range of the embodiment of the present invention is joined below according to Fig. 5 b
The configuration method for examining signal is described in detail, and a radio frames include 10 subframes, each subframe packet in LTE communication system
14 symbol are included, base station configures DRS transmission period in subframe 4, and DRS transmission period occupies the 4th symbol to the 7th
A symbol, base station configure multiple CCA periods and specified signal transmission time section in subframe 4, specify signal transmission time
The 2nd symbol and the 3rd symbol of Duan Zhanyong, the finish time of multiple CCA periods coincide with specified signal transmission time
The initial time of section.Base station listened within multiple CCA periods unauthorized band channels be idle state number reach
When preset times, the not used CCA period is determined, send in not used CCA period and specified signal transmission time section
Specified signal, and DRS to be transmitted is sent in DRS transmission period.
Implement the embodiment of the present invention, base station is configured to transmit the transmission period of DRS and at least one in subframe
CCA period, at least one CCA period are located at before DRS transmission period, and such base station can be to be transmitted in transmission
Channel status is detected according to preset strategy within the CCA period before DRS, then sends DRS in DRS transmission period,
Improve the success rate that DRS is sent.
Referring to Fig. 6, for a kind of configuration dress of the discovery reference signal based on unauthorized frequency range provided in an embodiment of the present invention
The structural schematic diagram set, in embodiments of the present invention, the configuration device include the first configuration module 601 and the second configuration module
602。
First configuration module 601, for configuring the DRS transmission period of discovery reference signal DRS to be transmitted in subframe.
Second configuration module 602, for configuring N number of CCA period in the subframe；Wherein, N >=1 and be integer, institute
Stating N number of CCA period is located at before the DRS transmission period.
The configuration device of the embodiment of the present invention for realizing embodiment of the method one one base of configuration method and embodiment of the method
In same design, bring technical effect is also identical, and concrete principle please refers to the description of embodiment of the method one, no longer superfluous herein
It states.
Optionally, configuration device further includes：
First sending module is idle state for listening to unauthorized band channels within N number of CCA period
When, the DRS to be transmitted is sent in the DRS transmission period；Wherein, N=1, the finish time weight of 1 CCA period
Together in the initial time of the DRS transmission period.
Optionally, configuration device further includes：
Third configuration module, in the finish time of N number of CCA period and rising for the DRS transmission period
Begin to be configured to transmit the specified signal transmission time section of specified signal between the moment；Wherein N=1, the specified signal include
Initial signal or preserved signal；
Second sending module is idle state for listening to unauthorized band channels within N number of CCA period
When, the specified signal is sent by the specified signal transmission time section, and institute is sent by the DRS transmission period
State DRS to be transmitted.
Optionally, configuration device further includes：
4th configuration module, in the finish time of N number of CCA period and rising for the DRS transmission period
Begin to be configured to transmit the specified signal transmission time section of specified signal between the moment；Wherein N > 1, the specified signal include
Initial signal or preserved signal；
Determining module, for listening to the number that unlicensed spectrum channel is idle state within N number of CCA period
When reaching preset times, the not used CCA period in N number of CCA period is determined；
Third sending module, for being sent out by the not used CCA period and the specified signal transmission time section
The specified signal is sent, and the DRS to be transmitted is sent by the DRS transmission period.
Optionally, the duration of the specified signal transmission time section is the transmission conditions for meeting the specified signal
Minimum value.
Optionally, configuration device further includes：
4th sending module, for obtaining the data transmission period section of downlink data to be transmitted；
In the case where the initial time of the DRS transmission period is located in the data transmission period section, do not execute
CCA flow journey does not send the specified signal, directly sends the DRS to be transmitted by the DRS transmission period.
Optionally, when N=1, the duration of 1 CCA period was the first duration；
N>When 1, N number of CCA period includes initial CCA period, enhancing channel idle detection ECCA period, institute
N number of CCA period is stated equipped with the delay defer period period；Wherein, when first duration, the initial CCA
Between duration of section, the defer period period duration be the ECCA period duration it is whole
Several times.
Foregoing invention embodiments and methods embodiment two to four is based on same design, and bring technical effect is also identical,
Concrete principle please refers to the description of embodiment of the method two to four, and details are not described herein again.
The embodiment of the invention also discloses a kind of base stations, which is characterized in that fills including configuration described in any one of the above
It sets.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and weighs according to the present invention
Benefit requires made equivalent variations, still belongs to the scope covered by the invention.
Claims (9)
1. a kind of configuration method of the discovery reference signal based on unauthorized frequency range, which is characterized in that including：
The DRS transmission period of discovery reference signal DRS to be transmitted is configured in subframe；
N number of idle-channel evaluation CCA period is configured in the subframe；Wherein, N >=1 and be integer, N number of CCA time
Section is located at before the DRS transmission period；
It is described N number of CCA period is configured in the subframe after, further include：
Listened within N number of CCA period unauthorized band channels be idle state when, in the DRS transmission period
It is interior to send the DRS to be transmitted；Wherein, N=1, the finish time of 1 CCA period coincide with the DRS transmission period
Initial time；Or
It is configured to transmit between the finish time of N number of CCA period and the initial time of the DRS transmission period
The specified signal transmission time section of specified signal；Wherein N=1, the specified signal include initial signal or preserved signal；
When to listen to unauthorized band channels within N number of CCA period be idle state, pass through the specified signal transmission
Period sends the specified signal, and sends the DRS to be transmitted by the DRS transmission period；Or
It is configured to transmit between the finish time of N number of CCA period and the initial time of the DRS transmission period
The specified signal transmission time section of specified signal；Wherein N > 1, the specified signal include initial signal or preserved signal；
Number that unlicensed spectrum channel is idle state is listened within N number of CCA period when reaching preset times, really
The not used CCA period in fixed N number of CCA period；
The specified signal, Yi Jitong are sent by the not used CCA period and the specified signal transmission time section
It crosses the DRS transmission period and sends the DRS to be transmitted.
2. the method as described in claim 1, which is characterized in that the duration of the specified signal transmission time section is to meet
The minimum value of the transmission conditions of the specified signal.
3. the method as described in claim 1, which is characterized in that further include：
Obtain the data transmission period section of downlink data to be transmitted；
In the case where the initial time of the DRS transmission period is located in the data transmission period section, CCA flow is not executed
Journey does not send specified signal, directly sends the DRS to be transmitted by the DRS transmission period；Wherein, the specified letter
Number include initial signal or preserved signal.
4. the method as described in claim 1, which is characterized in that
When N=1, the duration of 1 CCA period was the first duration；
N>When 1, N number of CCA period includes initial CCA period, enhancing channel idle detection ECCA period, the N
A CCA period is equipped with the delay deferperiod period；Wherein, first duration, the initial CCA period
Duration, the deferperiod period duration be the ECCA period duration integral multiple.
5. a kind of configuration device of the discovery reference signal based on unauthorized frequency range, which is characterized in that including：
First configuration module, for configuring the DRS transmission period of discovery reference signal DRS to be transmitted in subframe；
Second configuration module, for configuring N number of CCA period in the subframe；Wherein, N >=1 and be integer, it is described N number of
The CCA period is located at before the DRS transmission period；
The configuration device further includes：
First sending module, for listened within N number of CCA period unauthorized band channels be idle state when,
The DRS to be transmitted is sent in the DRS transmission period；Wherein, N=1, the finish time of 1 CCA period coincide with institute
State the initial time of DRS transmission period；Or
Third configuration module, for N number of CCA period finish time and the DRS transmission period starting when
It is configured to transmit the specified signal transmission time section of specified signal between quarter；Wherein N=1, the specified signal include initial
Signal or preserved signal；
Second sending module, for listened within N number of CCA period unauthorized band channels be idle state when, lead to
Cross the specified signal transmission time section and send the specified signal, and by the DRS transmission period send it is described to
Transmit DRS；Or
4th configuration module, for N number of CCA period finish time and the DRS transmission period starting when
It is configured to transmit the specified signal transmission time section of specified signal between quarter；Wherein N > 1, the specified signal include initial
Signal or preserved signal；
Determining module reaches for listening to the number that unlicensed spectrum channel is idle state within N number of CCA period
When preset times, the not used CCA period in N number of CCA period is determined；
Third sending module, for sending institute by the not used CCA period and the specified signal transmission time section
Specified signal is stated, and the DRS to be transmitted is sent by the DRS transmission period.
6. device as claimed in claim 5, which is characterized in that the duration of the specified signal transmission time section is to meet
The minimum value of the transmission conditions of the specified signal.
7. device as claimed in claim 5, which is characterized in that further include：
4th sending module, for obtaining the data transmission period section of downlink data to be transmitted.
8. device as claimed in claim 5, which is characterized in that
When N=1, the duration of 1 CCA period was the first duration；
N>When 1, N number of CCA period includes initial CCA period, enhancing channel idle detection ECCA period, the N
A CCA period is equipped with the delay deferperiod period；Wherein, first duration, the initial CCA period
Duration, the deferperiod period duration be the ECCA period duration integral multiple.
9. a kind of base station, which is characterized in that including the configuration device as described in claim 5-8 any one.
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| CN201510502202.0A CN105050190B (en) | 2015-08-14 | 2015-08-14 | Based on the discovery reference signal configuration method, apparatus of unauthorized frequency range and base station |
| PCT/CN2016/080823 WO2017028556A1 (en) | 2015-08-14 | 2016-04-29 | Method and device for configuring discovery reference signal based on unlicensed frequency band, and base station |
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| CN201510502202.0A CN105050190B (en) | 2015-08-14 | 2015-08-14 | Based on the discovery reference signal configuration method, apparatus of unauthorized frequency range and base station |
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| CN106912115A (en) * | 2015-12-23 | 2017-06-30 | 北京信威通信技术股份有限公司 | The sending method and device of stick signal and initial signal |
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| CN107295672B (en) * | 2016-03-30 | 2023-04-07 | 中兴通讯股份有限公司 | Uplink CCA detection method and device and terminal |
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| WO2018137230A1 (en) * | 2017-01-26 | 2018-08-02 | 华为技术有限公司 | Drs transmission method and apparatus on unlicensed spectrum |
| CN108989001B (en) * | 2017-05-31 | 2021-03-26 | 北京佰才邦技术有限公司 | eDRS sending and receiving method, base station and mobile communication terminal |
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| EP3911066B1 (en) * | 2019-01-10 | 2023-08-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Methods and devices for configuring, sending and receiving discovery reference signal (drs) |
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