CN105681006B - A kind of method and apparatus of LAA communication - Google Patents
A kind of method and apparatus of LAA communication Download PDFInfo
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- CN105681006B CN105681006B CN201410663131.8A CN201410663131A CN105681006B CN 105681006 B CN105681006 B CN 105681006B CN 201410663131 A CN201410663131 A CN 201410663131A CN 105681006 B CN105681006 B CN 105681006B
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Abstract
The invention proposes a kind of method and apparatus of LAA communication.Base station sends the first wireless signal in step 1, and second wireless singal is sent in step 2.Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.The transformat of first wireless signal uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transformat of CTS.The identification information of first wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.Present invention ensures that uplink signal is by the signal interference of adjacent LBT node, while avoiding the problem of UE can not carry out uplink transmission because detecting CTS.It is suitable for avoiding the downlink interference generated since the transmission power in downlink subframe is inconsistent.In addition, the present invention has been compatible with existing LTE standard as far as possible, there is good compatibility.
Description
Technical field
The present invention relates to the schemes that unlicensed spectrum communication is utilized in wireless communication system, more particularly to based on LTE
The communication means for unlicensed spectrum (Unlicensed Spectrum) of (Long Term Evolution, long term evolution)
And device.
Background technique
Traditional 3GPP (3rd Generation Partner Project, third generation cooperative partner program) LTE system
In, data transmission can only occur on authorization frequency spectrum, however as increased dramatically for portfolio, especially in some urban areas,
Authorization frequency spectrum is likely difficult to meet the needs of portfolio.62 plenary sessions of 3GPP RAN discuss a new research topic, i.e.,
The comprehensive research (RP-132085) of unlicensed spectrum, main purpose is the dependent of LTE of the research and utilization in unlicensed spectrum
(Non-standalone) it disposes, so-called dependent refers to that the communication in unlicensed spectrum wants and authorize the service on frequency spectrum small
Area is associated.One intuitive method is that (Carrier Aggregation, carrier wave are poly- by the CA that reuses in existing system as far as possible
Close) concept, that is, be deployed in authorization frequency spectrum on serving cell as Pcell (Primary Cell, main plot), be deployed in non-
Authorize the serving cell on frequency spectrum as Scell (Secondary Cell, secondary cell).For unlicensed spectrum, it is contemplated that its
Uncontrollable/prediction of interference level, LTE may use LBT in unlicensed spectrum, and (Listen Before Talk, is first detectd
Sent after listening) to avoid interference.LBT, that is, base station or UE (User Equipment, user equipment) before sending signal first
The reception power in unlicensed spectrum is monitored, is not interfered in the unlicensed spectrum if determined according to the reception power
Source then sends signal in the unlicensed spectrum, does not otherwise send signal.It is non-to award in RAN#64 plenary session (seminar)
It is LAA (License Assisted Access, the access of authorization frequency spectrum auxiliary) that the communication on frequency spectrum, which is weighed, by Uniform Name.
Unlicensed spectrum may work in TDD (Time Division Duplex, time division duplex) mode, i.e., unauthorized frequency
Spectrum is used for transmission downlink and uplink wireless signal.Since the maximum power that sends of UE is generally much smaller than base station (even micro- base
Stand) it is maximum send power, upper when the neighbouring LBT node of target BS (Wifi equipment or the base station LAA) executes LBT operation
The received signal power that row subframe and downlink subframe detect may differ by that very big (base station is to the interference of base station much larger than UE to base
The interference stood), therefore neighbouring LBT node is likely to the sub-frame of uplink of TDD LAA to treat as transmittable time slot and starts to send
Data, to cause biggish interference to the uplink receiving of target BS.Further, (belonging to after the sub-frame of uplink
In the same Channel holding time) downlink subframe, target BS and LBT node may all continue to send wireless signal, generate
Downlink interference.
In view of the above-mentioned problems, the invention discloses a kind of method and apparatus of LAA communication.
Summary of the invention
The invention discloses a kind of methods in base station, wherein includes the following steps:
Step A. sends the first wireless signal
Step B. sends second wireless singal
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First wireless communication
Number transformat use the transformats of Cellular Networks, the transformat of second wireless singal using CTS (Clear To Send,
Request send) transformat.The identification information of first wireless signal instruction second wireless singal.Second wireless singal instruction the
The length of one time window.
CTS is MAC defined in protocol of wireless local area network (access control among Medium Access Control) frame.
The transformat of the second wireless singal uses the transformat (format including physical layer frame structure) of CTS, i.e. the second nothing
Line signal for traditional WLAN (Wireless Local Area Network, WLAN) equipment be it is detectable and
It is CTS by traditional wlan device identification.
As one embodiment, the first wireless signal transmits on first carrier.As one embodiment, the first wireless communication
It number transmits on a second carrier, the second carrier wave is deployed in authorization frequency spectrum.
As one embodiment, the first wireless signal is LTE high-level signaling.As one embodiment, the identification information
It is signified by whole bits in RA (Receiving Address receives address) domain of the correspondence CTS in second wireless singal
Show or the domain RA of the correspondence CTS in second wireless singal in (end) partial bit indicated by.Implement as one
Example, the identification information includes at least one of:
The mark of base station operator described in-
- physical cell identity
The centre frequency of the corresponding PCell of-first carrier (Primary Cell, main plot), the Pcell are deployed in
Authorize frequency spectrum.
As one embodiment, the transmission cut-off time of second wireless singal is that the LTE of the configuration on first carrier is wireless
The cut-off time of wideband symbol in frame, the wideband symbol are (in downlink subframe) OFDM (Orthogonal
Frequency Division Multiplexing, orthogonal frequency division multiplexing) symbol either SC-FDMA (in sub-frame of uplink)
(Single Carrier Frequency Division Multi Access, single-carrier frequency division multiple access) symbol, the broadband
Symbol includes corresponding CP (Cyclic Prefix, cyclic prefix).
As one embodiment, the initial time of first time window is the transmission cut-off time of second wireless singal.
The essence of the above method is that LTE cell sends CTS reservation first time window, receives the Wifi equipment of CTS the
Signal is not sent in one time window.And for the UE (Wifi module may be equipped with) under the LTE MPS process, then it being capable of root
Judge that first time window be reserved uplink signal transmissions purposes of doing (may further include that downlink signal passes according to the identification information
It is defeated), i.e., the described UE can send uplink signal in first time window.The above method ensures uplink signal not by adjacent base station
Signal interference, while avoiding and (may be equipped with Wifi module) UE can not due to detecting CTS (second wireless singal)
The problem of carrying out uplink transmission.
Specifically, according to an aspect of the present invention, which is characterized in that further include following steps:
Step C. receives uplink signal in the first time window of first carrier.
The uplink signal refers to that UE is sent to the signal of base station.
Specifically, according to an aspect of the present invention, which is characterized in that the step B further includes following steps:
Step B0. sends downlink signal in the second time window of first carrier
As one embodiment, the cut-off time of the second time window is the sending instant of second wireless singal.
As one embodiment, the second time window is a part of first time window.The essence of the present embodiment is the base
Reservation stand for the subframe that downlink signal transmits, is caused between downlink subframe in the base station side because executing descending power distribution due to
Transmission changed power it is larger when, the base station may be sent power using smaller by the base station neighbouring LBT node
Subframe is mistakenly considered " free time " subframe, and then sends wireless signal in " free time " subframe and generate interference.The present embodiment
Help avoid the generation of this interference.
As one embodiment, the sending instant of second wireless singal is the initial time of subframe on first carrier.As
One embodiment, partial time period of the base station in the second time window send downlink signal, keep zero in remaining period
Send power.
Specifically, according to an aspect of the present invention, which is characterized in that first time window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal
The 1-K1 subframe after the transmission subframe of-second wireless singal
The K3 wideband symbol in K1+1 after the transmission subframe of-second wireless singal sub- frame head portions it is lasting when
Between.
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the just whole of X-1
Number, the K3 are less than the positive integer of X-1, and the X is the wideband symbol number that first carrier is taken in previous subframe.
As one embodiment, the wideband symbol is OFDM symbol.As one embodiment, the wideband symbol is
SC-FDMA symbol.The wideband symbol include corresponding CP (if the wideband symbol is the last one wideband symbol of subframe,
The wideband symbol further includes that the protection interval-Ts of 16 Ts is 1/30720 millisecond).
As one embodiment, CP format of the base station on first carrier is common CP, and the X is 14.As one
A embodiment, CP format of the base station on first carrier are extension CP, and the X is 12.
As one embodiment, after the transmission cut-off time that the initial time of first time window is second wireless singal
The transmission initial time of first wideband symbol.As one embodiment, first time window is used to indicate in second wireless singal
The correspondence unit of bit of length be microsecond, according to the total length of wideband symbol included by first time window with it is delicate be single
Position rounds up.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further includes following steps:
Step A0. sends at least one of downlink signaling instruction { K1, the K2, the K3 }.
As one embodiment, the downlink signaling is high-level signaling, the downlink signaling instruction K1, the K2,
The K3 }.As one embodiment, the downlink signaling is the DCI (Downlink for the transmission of dispatching uplink signal
Control Information, Downlink Control Information), the downlink signaling indicates the K2.It is described as one embodiment
Downlink signaling is the DCI for the transmission of dispatching uplink signal, and the downlink signaling indicates the K3.
Specifically, according to an aspect of the present invention, which is characterized in that with corresponding to the reception of CTS in second wireless singal
Partial bit in the bit in location domain is used to indicate the identification information.
As one embodiment, is corresponded in second wireless singal in the bit of the reception address field of CTS and remove the part
The value of remaining bit of bit is fixed.As one embodiment, the reception address field of CTS is corresponded in second wireless singal
Remaining bit that the partial bit is removed in bit is redefined as information bit.As one embodiment, the part ratio
The tail portion of the reception address field of the corresponding CTS of spy.
The invention discloses a kind of methods in UE, wherein includes the following steps:
Step A. receives the first wireless signal
Step B. receives second wireless singal
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First wireless communication
Number transformat use the transformats of Cellular Networks, the transformat of second wireless singal uses the transformat of CTS.First
The identification information of wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.
As one embodiment, the identification information includes at least one of:
The MCC (Mobile Country Code, Mobile Country Code MCC) of the serving cell operator of UE described in-
The MNC (Mobile Network Code, Mobile Network Code) of the serving cell operator of UE described in-
The physical cell identity (PCI-Physical Cell Identification) of the serving cell of UE described in-
The centre frequency of the corresponding PCell of-first carrier.
As one embodiment, the initial time of first time window is the transmission initial time of second wireless singal.
Specifically, according to an aspect of the present invention, which is characterized in that further include following steps:
Step C. sends uplink signal in the first time window of first carrier.
The uplink signal is the signal that UE is sent to base station.
Specifically, according to an aspect of the present invention, which is characterized in that the step B further includes following steps:
Step B0. is inscribed in the second time window of first carrier and receives downlink signal
As one embodiment, the cut-off time of the second time window is the sending instant of second wireless singal.As one
Embodiment, the second time window are a part of first time window.
As one embodiment, the sending instant of second wireless singal is the initial time of subframe on first carrier.As
One embodiment, partial time period of the base station in the second time window send downlink signal, keep zero in remaining period
Send power.
Specifically, according to an aspect of the present invention, which is characterized in that first time window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal
The 1-K1 subframe after the transmission subframe of-second wireless singal
The K3 wideband symbol in K1+1 after the transmission subframe of-second wireless singal sub- frame head portions it is lasting when
Between.
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the just whole of X-1
Number, the K3 are less than the positive integer of X-1, and the X is the wideband symbol number that first carrier is taken in previous subframe.
As one embodiment, the correspondence unit of the bit of the length of first time window is used to indicate in second wireless singal
It is microsecond, is rounded up as unit of delicate according to the total length of wideband symbol included by first time window.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further includes following steps:
Step A0. receives downlink signaling and determines at least one of { described K1, the K2, the K3 }.
Specifically, according to an aspect of the present invention, which is characterized in that with corresponding to the reception of CTS in second wireless singal
Partial bit in the bit in location domain is used to indicate the identification information.
The invention discloses a kind of base station equipments, which is characterized in that the equipment includes:
First module: for sending the first wireless signal
Second module: for sending second wireless singal
Third module: for receiving uplink signal in the first time window of first carrier.
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First wireless communication
Number transformat use the transformats of Cellular Networks, the transformat of second wireless singal uses the transformat of CTS.First
The identification information of wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.
As one embodiment, above equipment is characterized in that, the second module is also used to the second time in first carrier
Downlink signal is sent in window.Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when second
Between window be first time window a part.
As one embodiment, above equipment is characterized in that, it is { described that the first module is also used to send downlink signaling instruction
At least one of K1, the K2, the K3 }.
The invention discloses a kind of user equipmenies, which is characterized in that the equipment includes:
First module: for receiving the first wireless signal
Second module: for receiving second wireless singal
Third module: for sending uplink signal in the first time window of first carrier.
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First wireless communication
Number transformat use the transformats of Cellular Networks, the transformat of second wireless singal uses the transformat of CTS.First
The identification information of wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.
As one embodiment, above equipment is characterized in that, the second module is also used to the second time in first carrier
Window is inscribed to receive downlink signal.Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when second
Between window be first time window a part.
As one embodiment, above equipment is characterized in that, it is { described that the first module is also used to receive downlink signaling determination
At least one of K1, the K2, the K3 }.
For TDD LAA, target BS neighbouring LBT node is detected when executing LBT in sub-frame of uplink and downlink subframe
Received signal power may differ by very big, therefore neighbouring LBT node is likely to occupy the sub-frame of uplink of TDD LAA, thus
Cause biggish interference.In view of the above-mentioned problems, it is pre- that base station sends CTS the invention discloses a kind of method and apparatus of LAA communication
About sub-frame of uplink (may further include downlink subframe).Present invention ensures that uplink signal is by the signal interference of adjacent LBT node,
Uplink transmission can not be carried out because detecting CTS (second wireless singal) by avoiding and (may be equipped with Wifi module) UE simultaneously
The problem of.It is suitable for avoiding the downlink interference generated since the transmission power in downlink subframe is inconsistent.In addition,
The present invention has been compatible with existing LTE standard as far as possible, has good compatibility.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows the transmission flow figure of uplink signal according to an embodiment of the invention；
Fig. 2 shows transmission time sequence figures according to an embodiment of the invention；
Fig. 3 shows transmission time sequence figure according to still another embodiment of the invention；
Fig. 4 shows the structure chart of the CTS mac frame in second wireless singal according to an embodiment of the invention；
Fig. 5 shows the structural block diagram of the processing unit in base station according to still another embodiment of the invention；
Fig. 6 shows the structural block diagram of the processing unit in UE according to an embodiment of the invention；
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with attached drawing, it should be noted that do not rushing
In the case where prominent, the feature in embodiments herein and embodiment can be arbitrarily combined with each other.
Embodiment 1
Embodiment 1 illustrates the transmission flow figure of uplink signal, as shown in Fig. 1.In attached drawing 1, base station N1 is UE U2
Serving BS, LBT node N3 are the communication equipments that can demodulate CTS near the N1 of base station.It is the step of mark in box F1 wherein
Optional step.
For base station N1, the first wireless signal is sent in step slo；Second wireless singal is sent in step s 11；?
Uplink signal is received in the first time window of first carrier in step S12；In step s 13 in the second time of first carrier
Downlink signal is sent in window.
For UE U2, the first wireless signal is received in step S20；Second wireless singal is received in the step s 21；?
Uplink signal is sent in the first time window of first carrier in step S22；In the second time of first carrier in step S23
Window is inscribed to receive downlink signal.
LBT node N3 keeps zero to send power after receiving CTS in first time window.
In embodiment 1, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First
The transformat of wireless signal uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transmission lattice of CTS
Formula.The identification information of first wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.The
The cut-off time of two time windows is the sending instant of second wireless singal or the second time window is one of first time window
Point.
As the sub- embodiment 1 of embodiment 1, the first wireless signal transmits on the second carrier wave for being deployed in authorization frequency spectrum,
First wireless signal comprises at least one of the following:
- .PhysCellId IE (Infomration Element, information unit)
-.PLMN-Identity IE
- is used to indicate the high-level signaling of specific ID (Identification is identified), and the specific ID is by 24 bits
It constitutes.
The bit indication at least one of in the domain RA of CST is corresponded in second wireless singal:
-.PhysCellId IE
-.PLMN-Identity IE
Specific ID described in-.
As the sub- embodiment 2 of embodiment 1, first carrier is configured normal (Normal) CP by base station N1, at the first time
Window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal
The 1-K1 subframe after the transmission subframe of-second wireless singal
The K3 wideband symbol in K1+1 after the transmission subframe of-second wireless singal sub- frame head portions it is lasting when
Between.
Wherein, first time window is continuous in time, and the K1 is positive integer, the K2 be less than 13 it is just whole
Number, the K3 are less than 13 positive integer.The duration of the wideband symbol is 2192Ts (if the wideband symbol is one
Wideband symbol in a subframe except first wideband symbol and the last one wideband symbol) or 2208Ts (if the width
Tape symbol is first wideband symbol or the last one wideband symbol in a subframe), the Ts is 1/30720 millisecond.
As the sub- embodiment 3 of embodiment 1, second wireless singal passes in a corresponding wideband symbol on first carrier
It is defeated.
As the sub- embodiment 4 of embodiment 1, the first wireless signal transmits on first carrier.
Embodiment 2
Embodiment 2 illustrates the transmission time sequence figure in the present invention, as shown in Fig. 2.In attached drawing 2, the grid of oblique line mark
It is the time that second wireless singal occupies, the grid of backslash mark is protection interval, when the grid of bold box mark is first
Between window, cross spider mark grid be the second time window, wherein the second time window is optional.Subframe timing describes base station and exists
The initial time of the LTE subframe configured on first carrier.
Base station sends the first wireless signal and second wireless singal first.UE receives the first wireless signal and the second nothing first
Line signal.
In embodiment 2, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First
The transformat of wireless signal uses the transformat of LTE, and the transformat of second wireless singal uses the transformat of CTS.
The identification information of first wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.Base station
Keep zero to send power in protection interval, UE executed in the period of half behind the protection interval channel-monitoring operation with
Determine whether to send uplink signal.The starting sending instant of first time window is the cut-off sending instant of second wireless singal.
As the sub- embodiment 1 of embodiment 2, then base station removes protection interval in the first time window of first carrier
(blank parts and cross spider identification division of first time window i.e. in attached drawing 2) receive uplink signal in period.Then UE exists
Removed in the first time window of first carrier in the period of protection interval (i.e. in attached drawing 2 blank parts of first time window and
Cross spider identification division) send uplink signal.The uplink signal may only take up a subframe, i.e., remove in first time window
Part resource in the period of protection interval is idle.
As the sub- embodiment 2 of embodiment 2, then base station removes protection interval in the first time window of first carrier
(i.e. the blank parts of first time window in attached drawing 2) receive uplink signal on period, then in the second time of first carrier
Downlink signal is sent in window (i.e. the cross spider identification division of first time window in attached drawing 2).Wherein, the second time window is located at first
The tail portion of time window.
As the sub- embodiment 3 of embodiment 2, first time window includes:
The duration of the K2 wideband symbol of tail portion transmission subframe (the subframe #i in attached drawing 2) of-second wireless singal
The 1-K1 subframe (the subframe #i+1 in attached drawing 2, subframe #i+ after the transmission subframe of-second wireless singal
2, subframe #i+3, subframe #i+4)
The K3 on head the K1+1 subframe (the subframe #i+5 in attached drawing 2) after the transmission subframe of-second wireless singal
The duration of a wideband symbol.
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the just whole of X-1
Number, the K3 are less than the positive integer of X-1, and the X is the wideband symbol number that first carrier is taken in previous subframe.
As the sub- embodiment 4 of embodiment 3, the bit of the length of first time window is used to indicate in second wireless singal
Corresponding unit is microsecond, and the value of the bit is that the total length of the wideband symbol according to included by first time window is with delicate
Unit round up (value of corresponding embodiment 1, the bit is:Millisecond, wherein Ts is 1/30720 millisecond,It is
Smallest positive integral not less than Z).
As the sub- embodiment 5 of embodiment 2, the duration of the protection interval is equal to holding for positive integer wideband symbol
The continuous time.The protection interval listens to time slot needed for downlink propagation delay, and offer UE execution LBT operation for absorbing.
As the sub- embodiment 6 of embodiment 2, base station sends uplink scheduling DCI (for the uplink signal in scheduling subframe #i
Send), UE receives the uplink scheduling DCI.The uplink scheduling DCI indicates the K2.
As the sub- embodiment 7 of embodiment 2, base station sends uplink scheduling DCI (for the uplink letter in scheduling subframe #i+5
Number send), UE receives the uplink scheduling DCI.The uplink scheduling DCI indicates the K3.
Embodiment 3
Embodiment 3 illustrates the transmission time sequence figure in the present invention, as shown in Fig. 3.In attached drawing 3, the grid of oblique line mark
It is the time that second wireless singal occupies, the grid of backslash mark is protection interval, when the grid of bold box mark is first
Between window, cross spider mark grid be the second time window.Subframe timing describes the LTE subframe that base station configures on first carrier
Initial time.
Base station sends the first wireless signal and second wireless singal and downlink signal first, then the first of first carrier
The period upper (i.e. the blank parts of first time window in attached drawing 3) that protection interval and the second time window are removed in time window receives
Uplink signal.
UE receives the first wireless signal and second wireless singal and downlink signal first, then in the first of first carrier
Between remove period upper (i.e. the blank parts of first time window in attached drawing 2) of protection interval in window and send uplink signal.
In embodiment 3, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First
The transformat of wireless signal uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transmission lattice of CTS
Formula.The identification information of first wireless signal instruction second wireless singal.The length of second wireless singal instruction first time window.Base
It stands and keeps zero to send power in protection interval, UE executes channel-monitoring operation behind the protection interval in the period of half
To determine whether to send uplink signal.The starting sending instant of first time window is the cut-off sending instant of second wireless singal.
The downlink signal sends out transmission in the second time window.Second time window be located at first time window head (can reduce downlink/
Uplink switching point number).
As the sub- embodiment 1 of embodiment 3, the first wireless signal transmits in the second time window on first carrier.
As the sub- embodiment 2 of embodiment 3, the transmission cut-off time of second wireless singal corresponds to the symbol of the broadband in subframe #i
Number cut-off time (so that base station can start the transmission of subsequent LTE signal immediately).
Embodiment 4
Embodiment 4 illustrates the structure chart of the CTS mac frame in second wireless singal, as shown in Fig. 4.In attached drawing 4, the
CTS mac frame in binary signal includes 14 bytes i.e. 112 bits altogether, including the frame control domain of 16 bits, 16 ratios
Special duration field, the reception address field of 48 bits, the Frame Check Sequence domain of 32 bits.
The bit of duration field is used to indicate first time window, receive address field bit include two parts, i.e., its
Remaining bit and partial bit, wherein the partial bit is used to indicate the identification information of second wireless singal, remaining described bit
It is fixed, or to redefine the bit (for carrying downlink information).
As the sub- embodiment 1 of embodiment 4, the partial bit includes 29 bits for receiving address field end, is used for
Indicate the PCI and (affiliated) PLMN of the transmission cell of second wireless singal.Remaining described bit includes receiving address field head
19 bits.
Embodiment 5
Embodiment 5 illustrates the structural block diagram of the processing unit in a base station, as shown in Fig. 5.In attached drawing 5, processing
Device 200 is made of sending module 301, sending module 302 and receiving module 303.
Sending module 301 is for sending the first wireless signal；Sending module 302 is for sending second wireless singal；It receives
Module 303 is for receiving uplink signal in the first time window of first carrier.
In embodiment 5, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum.First
The transformat of wireless signal uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transmission lattice of CTS
Formula.It include common identification information in first wireless signal and second wireless singal.Second wireless singal indicates first time window
Length.The transformat of the Cellular Networks includes one of { LTE, WCDMA, TD-SCDMA, CDMA2000 }.
As the sub- embodiment 1 of embodiment 5, sending module 301 be also used to send downlink signaling instruction the K1, it is described
At least one of K2, the K3 }.
As the sub- embodiment 2 of embodiment 5, sending module 302 is also used to send in the second time window of first carrier
Downlink signal.Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or the second time window is
The a part on one time window head or the second time window are a part of first time window tail portion.
As the sub- embodiment 3 of embodiment 5, first time window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal
The 1-K1 subframe after the transmission subframe of-second wireless singal
The K3 wideband symbol in K1+1 after the transmission subframe of-second wireless singal sub- frame head portions it is lasting when
Between.
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the just whole of X-1
Number, the K3 are less than the positive integer of X-1, and the X is the wideband symbol number that first carrier is taken in previous subframe.The K2
With it is described K3's and be equal to the X.
As the sub- embodiment 4 of embodiment 5, the base station has the Wifi module for receiving and dispatching Wifi signal, sends mould
Block 202 is a part of the Wifi module.
As the sub- embodiment 5 of embodiment 5, the starting sending instant of first time window is the cut-off hair of second wireless singal
Send the moment.
Embodiment 6
Embodiment 6 illustrates the structural block diagram of the processing unit in UE, as shown in Fig. 6.In attached drawing 6, processing unit 300
By receiving module 301, receiving module 302 and sending module 303 are formed.
Receiving module 301 is for receiving the first wireless signal；Receiving module 302 is for receiving second wireless singal；It sends
Module 303 is for sending uplink signal in the first time window of first carrier.
In embodiment 6, the first wireless signal transmits on first carrier, and second wireless singal is transmitted on first carrier,
First carrier is deployed in unlicensed spectrum.The transformat of first wireless signal uses the transformat of Cellular Networks, and second is wireless
The transformat of signal uses the transformat of CTS.The identification information of first wireless signal instruction second wireless singal.Second nothing
The length of line signal designation first time window.
As the sub- embodiment 1 of embodiment 6, receiving module 302 is also used to receive in the second time window of first carrier
Downlink signal.Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or the second time window is
The a part on one time window head or the second time window are a part of first time window tail portion.
As the sub- embodiment 2 of embodiment 6, receiving module 301 be also used to receive downlink signaling determine the K1, it is described
At least one of K2, the K3 }.
As the sub- embodiment 3 of embodiment 6, the UE has the Wifi module for receiving and dispatching Wifi signal, receiving module
302 be a part of the Wifi module.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be referred to by program
Related hardware is enabled to complete, described program can store in computer readable storage medium, such as read-only memory, hard disk or light
Disk etc..Optionally, one or more integrated circuit can be used also to realize in all or part of the steps of above-described embodiment.Phase
It answers, each modular unit in above-described embodiment, can be realized using example, in hardware, it can also be by the form of software function module
It realizes, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification made, equivalent replacement, improve etc., it should be included in protection of the invention
Within the scope of.
Claims (14)
1. a kind of method in base station, wherein include the following steps:
Step A. sends the first wireless signal；
Step B. sends second wireless singal；
Step C. receives uplink signal in the first time window of first carrier；
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum；First wireless signal
Transformat uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transformat of CTS；First is wireless
The identification information of signal designation second wireless singal；The length of second wireless singal instruction first time window；Second wireless singal
It is used to indicate that the communication node except the sender of the uplink signal keeps zero transmission power in first time window.
2. the method according to claim 1, wherein the step B further includes following steps:
Step B0. sends downlink signal in the second time window of first carrier；
Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when the second time window is first
Between window a part.
3. method according to claim 1 or 2, which is characterized in that first time window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal；
The 1-K1 subframe after the transmission subframe of-second wireless singal；
K3 of K1+1 sub- frame head portions after the transmission subframe of-second wireless singal
The duration of wideband symbol；
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the positive integer of X-1, institute
The positive integer that K3 is less than X-1 is stated, the X is the wideband symbol number that first carrier is taken in previous subframe.
4. according to the method described in claim 3, it is characterized in that, the step A further includes following steps:
Step A0. sends at least one of downlink signaling instruction { K1, the K2, the K3 }.
5. method according to claim 1 or 4, which is characterized in that correspond to the reception address field of CTS in second wireless singal
Bit in partial bit be used to indicate the identification information.
6. a kind of method in UE, wherein include the following steps:
Step A. receives the first wireless signal；
Step B. receives second wireless singal；
Step C. sends uplink signal in the first time window of first carrier；
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum；First wireless signal
Transformat uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transformat of CTS；First is wireless
The identification information of signal designation second wireless singal；The length of second wireless singal instruction first time window；Second wireless singal
It is used to indicate that the communication node except the UE keeps zero transmission power in first time window.
7. according to the method described in claim 6, it is characterized in that, the step B further includes following steps:
Step B0. is inscribed in the second time window of first carrier and receives downlink signal；
Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when the second time window is first
Between window a part.
8. the method according to the description of claim 7 is characterized in that first time window includes at least one of:
The duration of K2 wideband symbol of the transmission subframe tail portion of-second wireless singal；
The 1-K1 subframe after the transmission subframe of-second wireless singal；
K3 of K1+1 sub- frame head portions after the transmission subframe of-second wireless singal
The duration of wideband symbol；
Wherein, first time window is continuous in time, and the K1 is positive integer, and the K2 is less than the positive integer of X-1, institute
The positive integer that K3 is less than X-1 is stated, the X is the wideband symbol number that first carrier is taken in previous subframe.
9. according to the method described in claim 8, it is characterized in that, the step A further includes following steps:
Step A0. receives downlink signaling and determines at least one of { described K1, the K2, the K3 }.
10. the method according to claim 7 or 9, which is characterized in that correspond to the reception address of CTS in second wireless singal
Partial bit in the bit in domain is used to indicate the identification information.
11. a kind of base station equipment, which is characterized in that the equipment includes:
First module: for sending the first wireless signal；
Second module: for sending second wireless singal；
Third module: for receiving uplink signal in the first time window of first carrier；
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum；First wireless signal
Transformat uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transformat of CTS；First is wireless
The identification information of signal designation second wireless singal；The length of second wireless singal instruction first time window；Second wireless singal
It is used to indicate that the communication node except the sender of the uplink signal keeps zero transmission power in first time window.
12. equipment according to claim 11, which is characterized in that the second module is also used to the second time in first carrier
Downlink signal is sent in window；Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when second
Between window be first time window a part.
13. a kind of user equipment, which is characterized in that the equipment includes:
First module: for receiving the first wireless signal；
Second module: for receiving second wireless singal；
Third module: for sending uplink signal in the first time window of first carrier；
Wherein, second wireless singal is transmitted on first carrier, and first carrier is deployed in unlicensed spectrum；First wireless signal
Transformat uses the transformat of Cellular Networks, and the transformat of second wireless singal uses the transformat of CTS；First is wireless
The identification information of signal designation second wireless singal；The length of second wireless singal instruction first time window；Second wireless singal
It is used to indicate that the communication node except the user equipment keeps zero transmission power in first time window.
14. equipment according to claim 13, which is characterized in that the second module is also used to the second time in first carrier
Window is inscribed to receive downlink signal；Wherein, the cut-off time of the second time window is the sending instant of second wireless singal or when second
Between window be first time window a part.
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| WO2017219214A1 (en) * | 2016-06-20 | 2017-12-28 | 华为技术有限公司 | Data packet sending method, and communication system identification method and device |
| CN107769903B (en) * | 2016-08-22 | 2020-01-31 | 上海朗帛通信技术有限公司 | method and device for wireless communication |
| CN109983826B (en) * | 2016-09-29 | 2022-08-23 | 瑞典爱立信有限公司 | Coordination of scheduled and contention-based uplink transmissions |
| CN111447685B (en) * | 2016-10-04 | 2023-04-07 | 上海朗帛通信技术有限公司 | Method and device for low-delay UE and base station |
| CN111405668A (en) * | 2016-12-09 | 2020-07-10 | 上海朗帛通信技术有限公司 | Method and equipment in UE and base station |
| US10645727B2 (en) * | 2016-12-28 | 2020-05-05 | Qualcomm Incorporated | Directional reception and periodic RTS/CTS transmission to estimate interference |
| US10306652B2 (en) * | 2017-02-10 | 2019-05-28 | Qualcomm Incorporated | Feedback interference management in sidelink |
| WO2019000562A1 (en) * | 2017-06-26 | 2019-01-03 | 华为技术有限公司 | Licensed assisted access system-based method and device for uplink data transmission |
| CN114938535B (en) * | 2017-12-15 | 2024-02-27 | 上海朗帛通信技术有限公司 | Method and apparatus in a communication node for wireless communication |
| EP3609279A1 (en) * | 2018-08-09 | 2020-02-12 | Panasonic Intellectual Property Corporation of America | User equipment and base station involved in improved discontinued reception for unlicensed cells |
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| WO2011068765A1 (en) * | 2009-12-02 | 2011-06-09 | Qualcomm Incorporated | Apparatus and methods for spectrum sharing using listen-before-talk with quiet periods |
| CN103703714A (en) * | 2011-07-21 | 2014-04-02 | Sca艾普拉控股有限公司 | Telecommunications system, apparatus and method for communicating to a first and a second class of terminals using a first and/or a second carrier |
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