WO2016050196A2 - Station de base pour une transmission laa dans des communications cellulaires, procédé et dispositif pour un équipement d'utilisateur - Google Patents

Station de base pour une transmission laa dans des communications cellulaires, procédé et dispositif pour un équipement d'utilisateur Download PDF

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WO2016050196A2
WO2016050196A2 PCT/CN2015/091015 CN2015091015W WO2016050196A2 WO 2016050196 A2 WO2016050196 A2 WO 2016050196A2 CN 2015091015 W CN2015091015 W CN 2015091015W WO 2016050196 A2 WO2016050196 A2 WO 2016050196A2
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symbols
carrier
current subframe
signaling
subframe
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PCT/CN2015/091015
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WO2016050196A3 (fr
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张晓博
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上海朗帛通信技术有限公司
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  • the present invention relates to a scheme for utilizing unlicensed spectrum communication in a wireless communication system, and more particularly to a method and apparatus for a subframe structure based on LTE (Long Term Evolution) unlicensed spectrum.
  • LTE Long Term Evolution
  • the serving cell deployed on the licensed spectrum is deployed as a Primary Component Carrier (PCC) on the unlicensed spectrum.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • LAA Liense Assisted Access
  • the LAA was formally established.
  • LBT Listen Before Talk
  • the LBT that is, the base station or the user equipment (UE)
  • the LTE communication mechanism is based on a subframe (consisting of multiple multi-carrier symbols), that is, the transmission of the primary wireless signal can only occur and terminate at the "traditional" time (ie, the transmission of the wireless signal is in units of subframes or The symbol is in units). If the LTE transmitter can only listen within a certain time window before the specific moment to confirm whether it can be sent, then a potential The unfairness is that Wifi devices on the same frequency band can listen in any time window to confirm whether it can be sent and send the transmission immediately after confirming that it can be sent, thus having more transmission opportunities than LTE LAA.
  • LTE LAA is likely to compete with Wifi LAA (Load Based Equipment) in the same way as Wifi, ie LTE LAA ( After the monitoring confirmation can be transmitted, it can occupy wireless resources and send wireless signals according to the load at any time.
  • Wifi LAA Load Based Equipment
  • the present invention discloses a LAA transmission method and apparatus in cellular communication.
  • the invention discloses a method in a base station for LAA transmission in cellular communication, comprising the following steps:
  • Step A Monitoring in a first time window of the first carrier to determine to transmit a useful signal in the current subframe of the first carrier
  • Step B transmitting, on the second carrier, the first signaling indicating N symbols for transmitting the useful signal in the current subframe of the first carrier
  • Step C transmitting a first useful signal in a current subframe of the first carrier, the first useful signal occupying the N symbols
  • the first signaling is physical layer signaling, the first carrier is deployed in the unlicensed spectrum, the second carrier is deployed in the licensed spectrum, and the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP (Cyclic Prefix) and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol including a CP or an SC-FDMA (Single) including a CP.
  • Carrier Frequency Division Multiple Access (Single Carrier Frequency Division Multiple Access) symbol The essence of the above method is that the base station (according to the monitoring result) transmits the physical layer signaling on the licensed spectrum to dynamically configure the symbols occupied by the useful signals on the unlicensed spectrum in the subframe to fully utilize the radio resources.
  • the subframe timing of the first carrier and the subframe timing of the second carrier are synchronized, and the transmission subframe of the first signaling is the current subframe.
  • the useful signal includes physical layer data and a corresponding RS (Reference Signal) for channel estimation, and the RS used for channel estimation is DMRS (Demodulation RS) or CRS (Cell RS, Cell RS).
  • DMRS Demodulation RS
  • CRS Cell RS, Cell RS
  • the useful signal includes physical layer data and corresponding RS for channel estimation and RS for channel measurement
  • the RS for channel measurement includes ⁇ CSI-RS, IMR (Interference Measurement Resource, One or two of the interference measurement resources).
  • the monitoring comprises at least one of ⁇ detecting received power, detecting a sequence of features ⁇ .
  • the first time window includes K consecutive time slices, the length of the time slice is predetermined and not less than 20 us (microsecond) or configurable, and the K is the The K is a positive integer randomly determined by the base station each time it is monitored.
  • the N symbols are indicated by Y bits in the first signaling, and the Y is a positive integer less than 4.
  • the Y bits indicate one of V candidate patterns in the current subframe, and the V candidate patterns are configured by higher layer signaling, where V is A positive integer not greater than 2 to the power of Y.
  • V is A positive integer not greater than 2 to the power of Y.
  • the Y is 1 and the V is 2
  • the V candidate patterns respectively correspond to a PDSCH symbol in a complete subframe and a PDSCH symbol in an incomplete subframe.
  • the incomplete subframe refers to a subframe in which part of the PDSCH symbol is lost due to LBE inversion, and vice versa is a complete subframe.
  • the advantage of the foregoing sub-embodiment 1 is that only one bit can be introduced in the first signaling, and the overhead of control signaling is reduced.
  • the above sub-embodiment 1 may introduce a new PDSCH subframe structure, for example, the candidate pattern corresponding to the incomplete subframe is the last X/2 symbols of the current subframe.
  • the step B comprises the following steps:
  • step B0 cyclically transmitting the feature sequence in the second time window of the first carrier
  • the start time of the second time window is delayed by T1us from the end time of the first time window, and the end time of the second time window is the end time of the symbol before the N symbols.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • the feature sequence includes at least one of a ⁇ ZC (ZadoffChu) sequence, a pseudo-random sequence ⁇ .
  • the receiving/transmitting switching time of the base station is 624Ts, and the Ts is 1/30720 milliseconds.
  • the second time window is less than the duration of one symbol.
  • the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1, the Z1 The number of possible symbols in a DwPTS (Downlink Pilot Time Slot) that can carry a PDSCH (Physical Downlink Shared Channel), which is configured by high layer signaling or is empty; Or the N symbols are the last M2 symbols of the current subframe, the M2 is an element in the positive integer set Z2, and the Z2 includes the possible number of symbols in the PDSCH of the normal subframe.
  • DwPTS Downlink Pilot Time Slot
  • PDSCH Physical Downlink Shared Channel
  • the reserved symbol is the first R symbols of the current subframe
  • the high layer signaling is an epdcch-StartSymbol IE (Information Element).
  • the Z2 also includes the X).
  • the mapping of the first useful signal to the physical resource reuses the PDSCH in the subframe structure of the corresponding PDSCH and the mapping of the RS to the physical resource for channel estimation.
  • the current subframe of the first carrier is configured as a downlink normal CP, and the Z1 is ⁇ 9, 10, 11, 12 ⁇ .
  • the current subframe of the first carrier is configured as a downlink extension CP, and the Z1 is ⁇ 8, 9, 10 ⁇ .
  • the number of possible symbols in the PDSCH of the normal subframe is the X minus the number of symbols used for the PDCCH (Physical Downlink Control Channel).
  • the Z2 is ⁇ 13, 12, 11 ⁇ ; if the current subframe of the first carrier is configured as a downlink Extending the CP, the Z2 is ⁇ 11, 10, 9 ⁇ .
  • the subframe timings of the first carrier and the second carrier are synchronized, and the first signaling is transmitted on the EPDCCH (Enhanced PDCCH) of the current subframe on the second carrier.
  • the subframe timing of the first carrier is delayed by a specific time offset from the subframe timing of the associated subframe of the corresponding second carrier, and the first signaling is performed on the second carrier.
  • the specific time offset is less than 1 ms.
  • the Z2 further includes the X. That is, if the current subframe of the first carrier is configured as a downlink normal CP, the Z2 is ⁇ 14, 13, 12, 11 ⁇ ; if the current subframe of the first carrier is configured as a downlink extended CP , Z2 is ⁇ 12, 11, 10, 9 ⁇ .
  • the subframe timings of the first carrier and the second carrier are synchronized, and the first signaling is transmitted on the EPDCCH of the second carrier.
  • the subframe timing of the first carrier is delayed by a specific time offset from the subframe timing of the associated subframe of the corresponding second carrier, and the first signaling is performed on the second carrier.
  • the specific time offset is less than 1 ms.
  • Another advantage of the above two embodiments is to support subframe timing in which the first carrier and the second carrier remain synchronized.
  • M2 is equal to the X minus 4 - applicable to 1.25 MHz (Mega-Hertz, megahertz) system bandwidth, while the 1.25 MHz system bandwidth may not be the primary configuration on the unlicensed spectrum.
  • the Y is 3 (ie, the N symbols are indicated by 3 bits in the first signaling).
  • the Y bits indicate one of the V1 candidate patterns in the current subframe, the V1 candidate patterns are predetermined, and the V1 is a positive integer not greater than 4.
  • the V1 candidate pattern includes ⁇ a symbol other than the reserved symbol in the first M1 symbols (the M1 includes 3-4 possibilities as described above), and the last M2 symbols (as described above, M2 includes 3 to 4 possibilities) ⁇ .
  • the latter M2 symbols correspond to symbols between the start time of the LTE LAA for the primary occupation of the radio resource and the subframe termination time of the nearest LAA carrier.
  • the pre-M1 symbols correspond to a symbol between a subframe start time of the latest LAA carrier before the end time of the LTE LAA to the occupied end of the radio resource, and a termination time of the one time occupation. If the termination time of the LTE LAA once occupied by the radio resource always corresponds to the termination time of one subframe, the N symbols can only be the last M2 symbols of the current subframe (ie, cannot be the current subframe) The M1 symbols).
  • the Y is 3.
  • the Y bits indicate one of the V2 candidate patterns of the N symbols in the current subframe, the V2 candidate patterns are predetermined, and the V2 is a positive integer not greater than 8.
  • the V2 candidate patterns include ⁇ the last M2 symbols (as described above, the M2 includes 3-4 possibilities) ⁇ .
  • the Y is 3.
  • the Y bits indicate one of V3 candidate patterns of the N symbols in the current subframe, the V3 candidate patterns are predetermined, and the V3 is a positive integer not greater than 8.
  • the V3 candidate patterns include ⁇ the last M2 symbols ⁇ .
  • the Z2 also includes all integers that satisfy the following conditions:
  • the minimum number of symbols in the PDSCH of the normal subframe is 11
  • the current subcarrier of the first carrier is configured as a downlink extended CP
  • the minimum number of symbols in the PDSCH of the normal subframe is 9. That is, Z2 in the above embodiment is ⁇ X/2, X/2+1, X/2+2, ..., X-1 ⁇ or ⁇ X/2, X/2+1, X/2+. 2,...,X ⁇ .
  • the above embodiment introduces a new PDSCH frame structure, which has the advantage of supporting downlink transmission at any position in the previous time slot of the current subframe.
  • the N symbols are located in the same time slot in the current subframe.
  • one subframe includes 2 slots, each slot being 0.5 ms (millisecond).
  • the first useful signal in the same time slot to the physical resource mapping adopts the special subframe configuration 1 when the downlink signal in the previous time slot of the special subframe and the RS to the physical resource used for channel estimation Mapping.
  • the first signaling is scheduling signaling of the first useful signal.
  • the first signaling is one of DCI (Downlink Control Information) format ⁇ 1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D ⁇ . That is, the LAA carrier supports both CRS and DMRS.
  • DCI Downlink Control Information
  • the subframe timings of the first carrier and the second carrier are synchronized, and the first signaling is transmitted on the EPDCCH of the second carrier.
  • the first signaling is located in a CSS (Common Search Space) and is supported by a cell common RNTI (Radio Network) Temporary Identifier, the signaling of the wireless network tentative identity.
  • a CSS Common Search Space
  • RNTI Radio Network
  • the cell common signaling is configured by higher layer signaling.
  • the first signaling includes G group configuration information, where the gth group configuration information Ig includes a carrier index Cg and a symbol index Sg, where the Sg is the current on the carrier of the Cg index A symbol occupied by a useful signal in a subframe, the G being a positive integer, and the g being a positive integer ranging from 1 to the G.
  • the subframe timing of the first carrier is delayed by a specific time offset from the subframe timing of the associated second carrier, and the first signaling is transmitted on the PDCCH of the second carrier.
  • the particular time offset is fixed or configurable.
  • the index of the first carrier and the N symbols correspond to one of the G group configuration information.
  • the payload size of the first signaling is equal to the payload size of the DCI format ⁇ 1A ⁇ for scheduling the first carrier transmitted on the second carrier.
  • the invention discloses a method in a UE for LAA transmission in cellular communication, comprising the following steps:
  • Step A Receive first signaling on the second carrier to determine N symbols for transmitting the useful signal in the current subframe of the first carrier
  • Step B receiving a first useful signal in the current subframe of the first carrier, the first useful signal occupying the N symbols
  • the first signaling is physical layer signaling, the first carrier is deployed in the unlicensed spectrum, the second carrier is deployed in the licensed spectrum, and the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the N symbols are indicated by Y bits in the first signaling, and the Y is a positive integer less than 4.
  • the Y bits indicate one of V candidate patterns in the current subframe, the V candidate patterns are predetermined, and the V is not greater than A positive integer of 2 to the power of Y.
  • the step A further includes the following steps:
  • Step A0 Receiving a cyclically transmitted feature sequence in a second time window of the first carrier
  • the start time of the second time window is delayed by T1us from the end time of the first time window, and the end time of the second time window is the end time of the symbol before the N symbols.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • the signature sequence includes at least one of a ⁇ ZC sequence, a pseudo-random sequence ⁇ .
  • the UE assists to perform at least one of the following according to the feature sequence:
  • the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1, the Z1 Include the number of possible symbols in the DwPTS capable of carrying the PDSCH, the reserved symbols are configured by high layer signaling or are empty; or the N symbols are the last M2 symbols of the current subframe, and the M2 is a positive integer One element in set Z2, which includes the number of possible symbols in the PDSCH of a normal subframe.
  • the N symbols are located in the same time slot in the current subframe.
  • the first signaling is scheduling signaling of the first useful signal.
  • the first signaling is signaling located in the CSS and identified by the cell common RNTI.
  • the load size of the first signaling is equal to the load size of the DCI format ⁇ 1C ⁇ for scheduling the first carrier transmitted on the second carrier.
  • the first signaling is one of DCI ⁇ 2B, 2C, 2D ⁇ . That is, the LAA carrier only supports DMRS.
  • the invention discloses a base station device, and the base station device comprises:
  • a first module configured to monitor in a first time window of the first carrier to determine to transmit a useful signal in a current subframe of the first carrier
  • a second module transmitting, by using, on the second carrier, the first signal indicating the N symbols used to transmit the useful signal in the current subframe of the first carrier
  • a third module configured to send a first useful signal in a current subframe of the first carrier, where the first useful signal occupies the N symbols
  • the first signaling is physical layer signaling, the first carrier is deployed in the unlicensed spectrum, the second carrier is deployed in the licensed spectrum, and the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the foregoing base station device is characterized in that the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1.
  • the Z1 includes a possible number of symbols in a DwPTS capable of carrying a PDSCH, the reserved symbol is configured by high layer signaling or is empty; or the N symbols are the last M2 symbols of the current subframe, the M2 Is an element in the set of positive integers Z2, which includes the number of possible symbols in the PDSCH of a normal subframe.
  • the above apparatus is characterized in that the N symbols are indicated by Y bits in the first signaling, and the Y is a positive integer less than 4.
  • the second module is further configured to cyclically transmit the sequence of features in a second time window of the first carrier.
  • the start time of the second time window is delayed by T1us from the end time of the first time window, and the end time of the second time window is the end time of the symbol before the N symbols.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • the invention discloses a user equipment, and the user equipment comprises:
  • a first module configured to receive, by using the first signaling on the second carrier, the N symbols used to transmit the useful signal in the current subframe of the first carrier
  • a second module configured to receive a first useful signal in the current subframe of the first carrier, where the first useful signal occupies the N symbols
  • the first signaling is physical layer signaling, the first carrier is deployed in the unlicensed spectrum, the second carrier is deployed in the licensed spectrum, and the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the foregoing user equipment is characterized in that the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1.
  • Z1 includes the number of possible symbols in the DwPTS capable of carrying the PDSCH, the reserved symbols are configured by high layer signaling or are empty; or the N symbols are The last M2 symbols of the current subframe, the M2 is an element in the positive integer set Z2, and the Z2 includes the number of possible symbols in the PDSCH of the normal subframe.
  • the user equipment is characterized in that the N symbols are indicated by Y bits in the first signaling, and the Y is a positive integer less than 4.
  • the first module is further configured to receive the cyclically transmitted feature sequence in a second time window of the first carrier.
  • the start time of the second time window is delayed by T1us from the end time of the first time window, and the end time of the second time window is the end time of the symbol before the N symbols.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • the base station dynamically indicates the symbol occupied by the useful signal in the current subframe.
  • the solution of the present invention reuses the PDSCH subframe structure of the existing LTE, that is, does not introduce a new PDSCH subframe structure due to the LBE.
  • the invention enables LTE LAA to maintain the same fairness as Wifi while making full use of air interface resources. Furthermore, the present invention maintains compatibility with LTE systems as much as possible.
  • FIG. 1 shows a flow chart of a downlink transmission according to an embodiment of the present invention
  • FIG. 2 shows a timing diagram of an LBE-based LBT in accordance with one embodiment of the present invention
  • FIG. 3 shows a schematic diagram of mapping of useful signals to physical resources in accordance with one embodiment of the present invention
  • FIG. 4 is a block diagram showing the structure of a processing device in a base station according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing the structure of a processing device in a UE according to an embodiment of the present invention.
  • Embodiment 1 illustrates a downlink transmission flow chart as shown in FIG.
  • base station N1 is a serving base station of UE U2.
  • step S11 monitoring in a first time window of the first carrier determines to transmit a useful signal in the current subframe of the first carrier; in step S12, transmitting a first signaling indication on the second carrier N symbols for transmitting a useful signal in the current subframe of the first carrier; in step S13, transmitting a first useful signal in a current subframe of the first carrier, the first useful signal occupying the N symbols.
  • step S21 receiving the first signaling on the second carrier determines N symbols for transmitting the useful signal in the current subframe of the first carrier; in step S22, in the first carrier The current subframe receives the first useful signal.
  • the first signaling is physical layer signaling
  • the first carrier is deployed in the unlicensed spectrum
  • the second carrier is deployed in the licensed spectrum
  • the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the first signaling is transmitted in the current subframe.
  • the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1, the Z1 Include the number of possible symbols in the DwPTS capable of carrying the PDSCH, the reserved symbols are configured by high layer signaling or are empty; or the N symbols are the last M2 symbols of the current subframe, and the M2 is a positive integer One element in set Z2, which includes the number of possible symbols in the PDSCH of a normal subframe.
  • the N symbols are indicated by 2 bits in the first signaling, or the N symbols are indicated by 3 bits in the first signaling.
  • the N symbols are located in the same time slot in the current subframe.
  • the N symbols are indicated by 1 bit in the first signaling, and the same time slot is the next time slot of the current subframe.
  • the first signaling is scheduling signaling of the first useful signal.
  • the first signaling is signaling located at the CSS and identified by the cell common RNTI.
  • the N symbols are indicated by Y bits in the first signaling, the Y is a positive integer less than 4, and the Y bits indicate that the N symbols are in the One of V candidate patterns in the current subframe, the V candidate patterns being high-level For signaling configuration, the V is a positive integer of Y power less than 2.
  • Embodiment 2 illustrates a timing diagram of an LBE-based LBT, as shown in FIG.
  • the slanted line identifies the first time window and the back slash identifies the second time window, the cross line identifying the transmission resources of the useful signal.
  • the base station first monitors in a first time window of the first carrier to determine to transmit a useful signal in a current subframe of the first carrier; then transmits the first signaling on the second carrier to the UE indicating the current subframe of the first carrier.
  • the N symbols used to transmit the useful signal finally, the first useful signal is sent to the UE in the current subframe of the first carrier, and the first useful signal occupies the N symbols.
  • the first signaling is physical layer signaling
  • the first carrier is deployed in the unlicensed spectrum
  • the second carrier is deployed in the licensed spectrum
  • the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the subframe timing of the first carrier and the subframe timing of the second carrier are synchronized.
  • the current subframe is the first subframe in FIG. 2, and the N symbols are the last M2 symbols of the current subframe (such as in the first subframe).
  • Cross-line identification said M2 being an element in a positive integer set Z2, said Z2 comprising the number of possible symbols in the PDSCH of a normal subframe.
  • the first signaling is transmitted on the EPDCCH of the first subframe (cannot be transmitted on the PDCCH because the base station cannot determine whether to transmit the first useful signal at the start time of the first subframe).
  • the double-headed arrow AR1 indicates a time range covered by the primary occupation of the base station on the first carrier (from time t_1 to time t_2), and the current subframe is the second in FIG. a subframe, the N symbols are the first M1 symbols of the current subframe (such as a cross-line identifier in the second subframe), and the M1 is an element in the positive integer set Z1, and the Z1 includes a portable The number of possible symbols in the DwPTS of the PDSCH.
  • the first signaling is transmitted in the EPDCCH or PDCCH of the second subframe.
  • the base station cyclically transmits an L+1 feature sequence in a second time window of the first carrier (as shown in FIG. 2, a diagonal slash identifier is added, where L+1 The secondary transmission is truncated).
  • the start time of the second time window is delayed by T1us compared to the end time of the first time window, and the end time of the second time window is a symbol before the N symbols
  • the termination time that is, the second time window and the N symbols are continuous.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • Embodiment 3 exemplifies a mapping of useful signals to physical resources in a PRBP (Physical Resource Block Pair), as shown in FIG. 3.
  • PRBP Physical Resource Block Pair
  • the cross line identifies the DMRS, the slash identification CSI-RS, the thick line identification CRS, the blank identification PDSCH, and the back slash identification square is a symbol that cannot be used to transmit a useful signal.
  • the base station transmits a useful signal in the current subframe on the carrier of the unlicensed spectrum, the useful signal occupies N symbols, and the current subframe is configured as a normal CP.
  • the N symbols are the last M2 symbols of the current subframe
  • the M2 is an element in the positive integer set Z2
  • the Z2 includes ⁇ 11, 12, 13, 14 ⁇ .
  • the useful signal includes a PDSCH, a DMRS, and a CSI-RS.
  • the DMRS and the CSI-RS completely reuse the physical resource mapping scheme of the existing LTE.
  • the M2 is not 14, the PDSCH completely reuses the physical resource mapping scheme of the existing LTE, when the M2 It is the 14th PDSCH starting from the first symbol of the current subframe, and the other reuses the corresponding physical resource mapping scheme of the existing LTE.
  • Figure 3(a) illustrates a scenario where M2 is 11.
  • the N symbols are the last M2 symbols of the current subframe, the M2 is 7, and the useful signal includes a PDSCH, a DMRS, where the DMRS is reused in the existing LTE.
  • the N symbols are the first M1 symbols of the current subframe
  • the M1 is an element in the positive integer set Z1
  • the Z1 includes ⁇ 9, 10, 11, 12 ⁇ .
  • the useful signal includes a PDSCH, a CRS, a CSI-RS, and the mapping of the useful signal to the physical resource reuses a corresponding mapping scheme in the existing LTE.
  • Figure 3(c) illustrates a scenario where M1 is 10.
  • the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1, the Z1 Including ⁇ 9, 10, 11, 12 ⁇ , the reserved symbols are configured by higher layer signaling.
  • the useful signal includes a PDSCH, a DMRS, and the mapping of the useful signal to the physical resource reuses a corresponding downlink signal mapping scheme in the DwPTS including the M1 symbols in the existing LTE.
  • Figure 3 (d) illustrates that M1 is 11, and the reserved symbol is the first two symbols of the current subframe. Scene.
  • Embodiment 4 exemplifies a structural block diagram of a processing device in a base station device, as shown in FIG.
  • the processing device 400 in the base station device is mainly composed of a monitoring module 401, a first sending module 402, and a second sending module 403.
  • the monitoring module 401 is configured to monitor, in a first time window of the first carrier, to determine that the current subframe transmits a useful signal, where the first sending module 402 is configured to send the first signaling indication on the second carrier. N symbols for transmitting a useful signal in the current subframe of the carrier; the second sending module 403 is configured to send a first useful signal in a current subframe of the first carrier, where the first useful signal occupies the N symbols.
  • the first signaling is physical layer signaling
  • the first carrier is deployed in the unlicensed spectrum
  • the second carrier is deployed in the licensed spectrum
  • the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the subframe timing of the first carrier and the subframe timing of the second carrier are synchronized, and the first signaling is transmitted in the current subframe, or the subframe timing of the first carrier and the subframe timing of the second carrier are associated. And the first signaling is transmitted in the associated subframe of the second carrier in the current subframe.
  • the N symbols are symbols other than reserved symbols in the first M1 symbols of the current subframe, and the M1 is an element in the positive integer set Z1, the Z1 Include the number of possible symbols in the DwPTS capable of carrying the PDSCH, the reserved symbols are configured by high layer signaling or are empty; or the N symbols are the last M2 symbols of the current subframe, and the M2 is a positive integer One element in set Z2, which includes the number of possible symbols in the PDSCH of a normal subframe.
  • the first sending module 402 is further configured to cyclically transmit the feature sequence in the second time window of the first carrier.
  • the start time of the second time window is delayed by T1us from the end time of the first time window, and the end time of the second time window is the end time of the symbol before the N symbols.
  • the T1us is greater than or equal to a receiving/transmission switching time of the base station.
  • Embodiment 5 exemplifies a structural block diagram of a processing device in a UE, as shown in FIG. Figure 5
  • the processing device 500 in the UE is mainly composed of a first receiving module 501 and a second receiving module 502.
  • the first receiving module 501 is configured to receive, on the second carrier, the first signaling to determine N symbols used to transmit the useful signal in the current subframe of the first carrier; and the second receiving module 502 is configured to use the first carrier
  • the current subframe receives the first useful signal, and the first useful signal occupies the N symbols.
  • the first signaling is physical layer signaling
  • the first carrier is deployed in the unlicensed spectrum
  • the second carrier is deployed in the licensed spectrum
  • the N is a positive integer not greater than X and not less than X/2.
  • the current subframe of the first carrier is configured as a downlink normal CP and the X is 14, or the current subframe of the first carrier is configured as a downlink extended CP and the X is 12.
  • the N symbols are continuous in the time domain.
  • the subframe timing of the first carrier and the subframe timing of the second carrier are synchronized, and the first signaling is transmitted in the current subframe, or the subframe timing of the first carrier and the subframe timing of the second carrier are associated. And the first signaling is transmitted in the associated subframe of the second carrier in the current subframe.
  • the N symbols are indicated by Y bits in the first signaling, and Y is a positive integer less than 4.
  • the first signaling is scheduling signaling of the first useful signal.
  • the first signaling is signaling located at the CSS and identified by the cell common RNTI.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention a trait à une station de base pour une transmission LAA dans des communications cellulaires, ainsi qu'à un procédé et à un dispositif pour un équipement d'utilisateur. Dans une première étape, la station de base effectue une surveillance, dans une première fenêtre de temps d'une première porteuse, afin d'établir une transmission d'un signal utilisable dans la sous-trame courante de ladite première porteuse ; dans une deuxième étape, une signalisation est envoyée sur une seconde porteuse indiquant N symboles utilisés pour la transmission d'un signal utilisable dans ladite sous-trame courante de ladite première porteuse ; dans une troisième étape, un premier signal utilisable est envoyé dans la sous-trame courante de la première porteuse, ledit premier signal utilisable occupant les N symboles. La présente invention permet à une transmission LTE LAA de maintenir la même impartialité que Wifi tout en utilisant en même temps toutes les ressources d'interface radio. De plus, la présente invention reste autant que possible compatible avec des systèmes LTE.
PCT/CN2015/091015 2014-09-30 2015-09-29 Station de base pour une transmission laa dans des communications cellulaires, procédé et dispositif pour un équipement d'utilisateur WO2016050196A2 (fr)

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CN107787005A (zh) * 2016-08-26 2018-03-09 北京三星通信技术研究有限公司 在链路质量监测的方法和相应的用户设备
CN110582119A (zh) * 2018-06-11 2019-12-17 上海朗帛通信技术有限公司 一种被用于无线通信的用户设备、基站中的方法和装置
CN111405674A (zh) * 2016-12-09 2020-07-10 上海朗帛通信技术有限公司 一种ue和基站中的方法和设备
CN111586871A (zh) * 2018-02-13 2020-08-25 上海朗帛通信技术有限公司 一种用于无线通信的通信节点中的方法和装置

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US20160227476A1 (en) * 2015-01-29 2016-08-04 Qualcomm Incorporated Timing information for discovery in unlicensed spectrum
CN107787005B (zh) * 2016-08-26 2023-04-07 北京三星通信技术研究有限公司 在链路质量监测的方法和相应的用户设备
CN107787005A (zh) * 2016-08-26 2018-03-09 北京三星通信技术研究有限公司 在链路质量监测的方法和相应的用户设备
CN111405674A (zh) * 2016-12-09 2020-07-10 上海朗帛通信技术有限公司 一种ue和基站中的方法和设备
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