WO2018201785A1 - 不完整子帧的传输和解调方法、相应的用户设备和基站 - Google Patents

不完整子帧的传输和解调方法、相应的用户设备和基站 Download PDF

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Publication number
WO2018201785A1
WO2018201785A1 PCT/CN2018/077841 CN2018077841W WO2018201785A1 WO 2018201785 A1 WO2018201785 A1 WO 2018201785A1 CN 2018077841 W CN2018077841 W CN 2018077841W WO 2018201785 A1 WO2018201785 A1 WO 2018201785A1
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Prior art keywords
subframe
incomplete
dmrs
layers
incomplete subframe
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PCT/CN2018/077841
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English (en)
French (fr)
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姜宇
刘柳
李安新
原田浩树
永田聪
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株式会社Ntt都科摩
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present disclosure relates to the field of wireless communications, and in particular, to a method for transmitting and demodulating uplink incomplete subframes on an unlicensed spectrum, and corresponding user equipment and base stations.
  • the DMRS (Demodulation Reference Signal) plays an important role when transmitting a radio signal of a PUSCH (Physical Uplink Shared Channel) using an unlicensed spectrum.
  • the DMRS is mainly used for the eNodeB to perform channel estimation on the uplink physical channel in order to correctly demodulate the PUSCH, and the DMRS is usually located on the last 4th SC-FDMA symbol of each slot (Slot).
  • Fig. 1 schematically shows the structure of a normal PUSCH subframe. As shown in FIG. 1, two DMRSs of one normal subframe are located at the fourth SC-FDMA symbol of the first slot and the fourth SC-FDMA symbol of the second slot, respectively.
  • orthogonal modulation between DMRSs can be ensured by using a cyclic shift and an Orthogonal Cover Code (OCC) configuration including two codewords. For example, it can be based on the And OCC configuration to provide orthogonality between DMRS.
  • OCC Orthogonal Cover Code
  • incomplete subframes are also supported on unlicensed spectrum transmissions.
  • An example of an incomplete start subframe and an incomplete end subframe is schematically illustrated in FIG.
  • the incomplete start subframe and the incomplete end subframe only one DMRS OFDM symbol is included. More generally, in a partial subframe having a length less than or equal to 10 SC-FDMA symbols, there is also only one DMRS OFDM symbol.
  • a subframe In order to support orthogonal code codes of two codewords at the same time, a subframe generally requires two DMRS symbols. Therefore, for the incomplete subframe, the current DMRS configuration mode cannot simultaneously support two codewords of the orthogonal cover code, so that only the DMRS can be cyclically shifted, resulting in a maximum of only two orthogonal layers.
  • the MIMO layer is common to all subframes that are scheduled.
  • MMF Multiple Frame Scheduling
  • UL grant uplink grant information
  • DCI Downlink Control Information
  • the second method limits the use. In transmitting the number of layers of the subframe, the transmission efficiency of the UL is reduced.
  • the present disclosure proposes a method for transmitting and demodulating an uplink incomplete subframe on an unlicensed spectrum, and a corresponding user equipment and base station, so that the UL grant and the normal sub-frame of the incomplete subframe can be
  • the UL grant of the frame is compatible and enables transmission of the subframe on as many orthogonal layers as possible.
  • a method for transmitting an uplink incomplete subframe on an unlicensed spectrum including: supporting the number of layers of uplink transmission and incomplete subframes specified according to uplink scheduling information At least one of the number of orthogonal layers, and the number of DMRS symbols included in the incomplete subframe, determining a transmission mode of the demodulation reference signal DMRS for the incomplete subframe; and using the determined DMRS transmission mode, the transmission is not The full subframe.
  • a method of demodulating an uplink incomplete subframe on an unlicensed spectrum including: number of layers of uplink transmission and reception incompleteness specified according to uplink scheduling information At least one of the number of layers of the frame and the number of demodulation reference signal DMRS symbols included in the incomplete subframe, determining a configuration manner of the DMRS for the incomplete subframe; extracting the DMRS based on the determined configuration manner of the DMRS, and The incomplete subframe is demodulated using the extracted DMRS.
  • a user equipment comprising a processor configured to perform the method of transmitting an uplink incomplete subframe on an unlicensed spectrum as described above.
  • a base station that includes a processor configured to perform the method of demodulating an uplink incomplete subframe on an unlicensed spectrum as described above.
  • Fig. 1 schematically shows the structure of a normal PUSCH subframe.
  • Fig. 2 schematically shows an incomplete starting subframe starting with a slot boundary and an incomplete ending subframe ending with a slot boundary.
  • FIG. 3 is a flow chart schematically showing a method of transmitting an uplink incomplete subframe on an unlicensed spectrum proposed by the present disclosure.
  • FIG. 5 is a schematic illustration of the principles of Embodiment 2 of the present disclosure.
  • FIG. 6 is a schematic illustration of the principles of Embodiment 3 of the present disclosure.
  • FIG. 9 schematically illustrates a method of demodulating an uplink incomplete subframe on an unlicensed spectrum as proposed by the present disclosure.
  • FIG. 10 is a diagram schematically showing an example of a hardware configuration of a base station and a user terminal according to the present disclosure.
  • a method of transmitting an uplink incomplete subframe on an unlicensed spectrum includes: at step S300, at least one of a number of layers of an uplink transmission and a number of orthogonal layers supported by an incomplete subframe, according to uplink scheduling information, and an incomplete
  • the number of DMRS symbols included in the subframe, the transmission mode of the demodulation reference signal DMRS is determined for the incomplete subframe; and in step S310, the incomplete subframe is transmitted by using the determined DMRS transmission manner.
  • the number of layers of the uplink transmission specified by the uplink scheduling information UL grant and the number of orthogonal transmission layers supported by the incomplete subframe to be scheduled may be considered, and the incompleteness is considered
  • the number of DMRS symbols included in the subframe to flexibly determine the transmission mode of the DMRS for the incomplete subframe; not only can improve the compatibility of the uplink scheduling for the incomplete subframe transmission and the uplink scheduling for the normal subframe transmission, and It is also possible to use as many orthogonal layers as possible to transmit incomplete subframes, improving the efficiency of incomplete subframe transmission.
  • Embodiment 1 of the present disclosure for a case where an incomplete subframe contains only one DMRS OFDM symbol OS, a policy of fall back transmission is proposed to make scheduling of an incomplete subframe and a normal subframe.
  • the scheduling can be compatible, avoiding specifying separate UL grant information for incomplete subframes and normal subframes.
  • the backoff may include a manner of backing up the number of layers used for transmitting the incomplete subframe (hereinafter simply referred to as layer number fallback, the first example), and may further include The manner in which the DMRS sequence for the incomplete subframe is rolled back (hereinafter simply referred to as sequence fallback, second example).
  • FIG. 4A schematically shows a case where the number of layers of the first example of the embodiment 1 is backed off.
  • the UE transmits the layer of the incomplete subframe from the number of layers indicated by the base station in the UL grant information, for example, four layers, back to the mutually supported subframes supported by each other. Two layers of the intersection.
  • the maximum orthogonal layer allowed is two layers. Therefore, when the UE determines that the base station indicates, by using the uplink scheduling information UL grant, the number of layers of the UE transmission subframe is greater than When the number of orthogonal layers supported by the complete subframe, and when the incomplete subframe contains only one DMRS symbol, the UE may perform layer back-off, that is, the number of layers used to transmit the incomplete subframe from the UL The number of layers indicated by grant falls back to the allowed number of orthogonal layers.
  • the UE determines whether the number of orthogonal layers supported by the incomplete subframe is smaller than the number of layers for transmission specified by the uplink scheduling information; the number of orthogonal layers supported by the UE is smaller than the uplink scheduling information.
  • the incomplete subframe is transmitted with the number of orthogonal layers it supports. For example, for the DMRS of each transport layer of the incomplete subframe, the corresponding codeword in Table 1 above may be applied, wherein the codeword of the orthogonal cover code for the incomplete subframe may be preset to 1, or may The orthogonal cover code specified by the uplink scheduling information is applied.
  • the UE can select layer #0 and layer #1 whose cyclic shift values between layers differ by 6.
  • FIG. 4B schematically shows the case of the sequence backoff of the second example of Embodiment 1.
  • the number of layers for transmission specified by the uplink scheduling information is determined as the number of layers transmitting the incomplete subframe, and the incomplete subframe applies only uplink scheduling information on each layer.
  • the specified cyclic shift does not use orthogonal cover codes to generate DMRS symbols. That is, for example, as shown in Table 3 below, orthogonality between layers for transmitting incomplete subframes is implemented using only cyclic shift CS without using OCC. For example, the orthogonal cover code may not be used, or the orthogonal cover codes OCC of the incomplete subframes of each layer may be configured to the same value.
  • the OCC is not used, and the cyclic shift CS follows the Cyclic shift for DMRS and OCC index field in the uplink-related DCI format [3] in the UL grant information. Instructions.
  • the same number of MIMO layers as a normal subframe can be achieved.
  • the compatibility between the incomplete subframe and the UL scheduling mechanism of the complete subframe can be implemented, and the existing transmission mechanism for the normal subframe is small, simple and easy to implement.
  • Embodiment 2 of the present disclosure for the case where an incomplete subframe contains only one DMRS OS, another strategy for determining a DMRS transmission mode for an incomplete subframe is proposed.
  • FIG. 5 schematically shows the principle of Embodiment 2 of the present disclosure.
  • the number of layers designated for transmission specified by the uplink scheduling information is determined as the number of layers transmitting the incomplete subframe, wherein the incomplete subframe includes only one DMRS symbol, And being scheduled by the multi-subframe scheduling mechanism together with other subframes; wherein, at each layer, the DMRS symbol included in the incomplete subframe is used together with the DMRS symbol included in the adjacent slot of the adjacent subframe. Adjust this incomplete subframe.
  • the adjacent subframe may be an adjacent complete subframe or an adjacent incomplete subframe as long as it has one DMRS symbol on an adjacent time slot with an incomplete subframe to be scheduled.
  • Embodiment 2 when determining the transmission mode of the DMRS of the incomplete subframe, the DMRS symbols included in the adjacent slots of the adjacent subframe are borrowed, and one DMRS included in the incomplete subframe. The symbols are combined to form two DMRS symbols so that cyclic shifts and orthogonal cover codes similar to normal subframes can be employed to ensure orthogonality between layers for transmitting incomplete subframes.
  • orthogonal coverage may be applied to the DMRS symbol included in the incomplete start subframe and the first DMRS symbol of the subsequent subframe adjacent thereto for the incomplete start subframe to be scheduled.
  • One codeword of the code for example, applies w ( ⁇ ) (1) and w ( ⁇ ) (0), respectively.
  • the second DMRS symbol of the previous subframe adjacent to the incomplete end subframe and the DMRS symbol included in the incomplete end subframe may be respectively applied to the DMRS symbol included in the incomplete end subframe.
  • One code of the overlay code is applied, for example, w ( ⁇ ) (1) and w ( ⁇ ) (0) are applied, respectively.
  • the incomplete subframe that needs to be scheduled is usually scheduled together with the adjacent subframe by using the multi-subframe scheduling mechanism.
  • the codeword w ( ⁇ ) (0) in the orthogonal cover code corresponding to the incomplete start subframe to be scheduled may be set according to the indication in the Cyclic shift for DMRS and OCC index field in the UL grant information. And setting a codeword w ( ⁇ ) (1) in the orthogonal cover code corresponding to the incomplete end subframe.
  • the incomplete subframe can be implemented in the same orthogonal layer as the normal subframe. To transfer.
  • DMRS can be transmitted on up to four orthogonal layers, the accuracy of channel estimation can be ensured.
  • Embodiment 3 of the present disclosure a strategy of determining a DMRS transmission mode for an incomplete subframe using two DMRSs of adjacent normal subframes is proposed.
  • FIG. 6 schematically shows the principle of Embodiment 3 of the present disclosure.
  • the number of layers for transmission specified by the uplink scheduling information is determined as the number of layers for transmitting the scheduled incomplete subframe, and the incomplete subframe is configured not to include DMRS symbol. Since two DMRS symbols of a neighboring normal subframe need to be borrowed, the usually scheduled incomplete subframe needs to be scheduled together with the adjacent normal subframe by the multi-subframe scheduling mechanism. That is, in Embodiment 3, when transmitting an incomplete subframe, the scheduled incomplete subframe itself may not use the DMRS symbol, but borrow two DMRS symbols included in the adjacent normal subframe. The transmission mode of the DMRS for the scheduled incomplete subframe is determined. Since two DMRS symbols of a normal subframe are borrowed, cyclic shift and orthogonal cover codes similar to normal subframes can be employed to ensure orthogonality between layers for transmitting incomplete subframes.
  • two DMRS symbols of the next normal subframe adjacent thereto may be utilized, and cyclic shift and orthogonal cover codes similar to normal subframes may be adopted. To ensure orthogonality between layers used to transmit incomplete subframes.
  • two DMRS symbols of the previous normal subframe adjacent thereto may be utilized, and cyclic shift and orthogonal cover codes similar to normal subframes may be adopted.
  • the orthogonality between the layers used to transmit the incomplete subframe is guaranteed.
  • the incomplete subframe may be configured by signaling such as RRC or DCI to not include the DMRS symbol by itself when transmitting.
  • a threshold may be indicated by RCC (Radio Resource Control) signaling, and when the number of symbols of the incomplete subframe is less than a threshold indicated by the control signaling, the incomplete subframe is configured to not include the DMRS symbol.
  • RCC Radio Resource Control
  • the incomplete start subframe and the incomplete end subframe are respectively configured to not include the DMRS symbol by using separate DCIs; or the incomplete start subframe may be incomplete and incomplete by common DCI control signaling. End subframes are configured together to not include DMRS symbols.
  • Embodiment 3 considering that two DMRS symbols of adjacent normal subframes need to be borrowed, the incomplete subframes that need to be scheduled are usually scheduled together with adjacent normal subframes by using a multi-subframe scheduling mechanism.
  • Embodiment 3 by borrowing two DMRS symbols of adjacent normal subframes, instead of including DMRS in the incomplete subframe, the transmission overhead of the DMRS is reduced, and the same as the normal subframe can be realized at the time of transmission. Orthogonal layer.
  • Embodiment 4 of the present disclosure for the case where the incomplete subframe contains only one DMRS OS, another strategy for determining the DMRS transmission mode for the incomplete subframe is proposed. 7A-7B schematically illustrate the principles of Embodiment 4 of the present disclosure.
  • Embodiment 4 another DMRS symbol is added for an incomplete subframe that originally contained only one DMRS OS, so that the incomplete subframe is the same as the maximum orthogonal layer supported by the normal subframe.
  • the number of layers designated for transmission specified by the uplink scheduling information is determined as the number of layers transmitting the incomplete subframe, and only one location and normal are originally included in the incomplete subframe.
  • the DMRS symbol of the same DMRS symbol of the subframe is the same, another DMRS symbol is added to the incomplete subframe; wherein the added another DMRS symbol is used together with the originally included DMRS symbol to demodulate the incomplete subframe
  • the location of another DMRS symbol added is different from the DMRS position of the normal subframe, and the location of the added DMRS symbol can be used to determine the start or end position of the incomplete subframe.
  • a new UL subframe format is defined for an incomplete subframe.
  • the configuration of the new subframe format is notified to the UE by the base station through control signaling.
  • the two DMRS symbols of the normal subframe are respectively located at the fourth SC-FDMA symbol of the two slots of the subframe.
  • the position of the DMRS symbol is not exactly the same as the position of the DMRS symbol of the normal subframe, which will be exemplified below.
  • the handover may be quickly switched to the transmission UL incomplete starting subframe, thereby increasing the probability of the UL acquiring the channel and improving the unlicensed spectrum. Transmission efficiency.
  • the number of symbols occupied by the corresponding DL incomplete subframe at the end of the DL incomplete subframe transmission may be ⁇ 3, 6, 9, 10, 11, 12 ⁇ , considering that a normal subframe occupies 14 symbols,
  • the number of symbols occupied by this corresponding UL incomplete start subframe is ⁇ 11, 8, 5, 4, 3, 2 ⁇ .
  • Figure 7A shows the location where DMRS symbols can be configured in this new UL subframe format.
  • the start position of the UL subframe transmission is the immediately preceding symbol #3, and therefore, the maximum number of symbols occupied by the UL incomplete starting subframe may be 11;
  • the first symbol of the incomplete starting sub-frame, such as symbol #3, may be used for channel listening (LBT), and another DMRS symbol is added to the incomplete subframe at the position of symbol #4.
  • LBT channel listening
  • the start position of the UL subframe transmission is the immediately adjacent symbol #6, and the maximum number of symbols occupied by the incomplete starting subframe may be 8; considering the UL LBT, The incomplete subframe adds another DMRS symbol at the location of symbol #7; at this point, the location of the other DMRS symbol added is also at the second symbol position of the incomplete starting subframe. It can be seen that the location of another DMRS symbol added to the incomplete start subframe can be used to indicate the starting position of the incomplete start subframe.
  • the same principle can be applied to the case where another DMRS symbol is added, as specifically seen in the diagram of FIG. 7A.
  • the number of symbols occupied by the incomplete end subframe needs to consider the number of symbols occupied by the corresponding incomplete starting subframe and the maximum burst length on the unlicensed band.
  • the number of symbols occupied by the corresponding UL incomplete start subframe may be ⁇ 11, 8, 5, 4, 3, 2 ⁇
  • the maximum burst length is 4 ms
  • the number of symbols occupied by the UL incomplete end subframe is May be ⁇ 3,6,9,10,11,12 ⁇ . The following simply describes ⁇ 6, 9, 11 ⁇ as the number of symbols occupied by the UL incomplete end subframe in this embodiment.
  • Figure 7B shows the location where DMRS symbols can be configured in this new UL subframe format. For example, when the number of symbols occupied by the UL incomplete end subframe is 6, and the UL incomplete end subframe transmission ends with the symbol #5, another DMRS symbol is added to the incomplete end subframe at the position of the symbol #2 or 3. . Similarly, the number of symbols occupied by the UL incomplete end subframe is 9, and when the UL subframe transmission ends with the symbol #8, another DMRS symbol is added to the incomplete subframe at the position of the symbol #7; The location of another DMRS symbol added to the incomplete end subframe may be used to indicate the end position of the incomplete end subframe. The number of symbols occupied by the UL incomplete end subframe is 11, the UL subframe transmission ends with the symbol #10, and the other DMRS symbol can be located at the symbol #9, see the illustration of FIG. 7B.
  • the detection of the start/end position of the incomplete subframe can be realized, and the same number of orthogonal layers as the normal subframe can be realized.
  • Embodiment 5 of the present disclosure for the case where the incomplete subframe contains only one DMRS OS, another strategy for determining the DMRS transmission mode for the incomplete subframe is proposed. 8A-8B schematically illustrate the principles of Embodiment 5 of the present disclosure.
  • the incomplete subframe contains only one DMRS OS
  • a strategy of determining the DMRS transmission using the IFDMA-based comb structure is proposed.
  • the orthogonality of subcarriers can be utilized to implement the same number of orthogonal layers as normal subframes for incomplete subframes including only one DMRS symbol.
  • Embodiment 5 can be further subdivided into Embodiment 5A and Embodiment 5B. The following is a detailed description of Embodiment 5A.
  • Embodiment 5A proposes, for an incomplete subframe including only one DMRS symbol, the number of layers designated for transmission specified by the uplink scheduling information as the number of layers transmitting the incomplete subframe, and the incomplete subframe
  • the subcarriers of the DMRS symbol are divided into two groups; the same cyclic shift is applied to the DMRS in the two sets of subcarriers on the same layer, and the orthogonal cover code is applied to the DMRS in the two sets of subcarriers.
  • Fig. 8A schematically shows the principle of Embodiment 5A.
  • the subcarriers of the DMRS symbols of the incomplete subframe are divided into two groups of comb## and comb#1, and then the same cyclic shift is applied to the same layer in the two groups of comb#0 and comb#1.
  • the fields of the Cyclic shift for DMRS and OCC index indicated by the UL grant shown in Table 1 can be reused without change.
  • the difference from the conventional manner of applying OCC2 is mainly that the two codewords of the orthogonal cover code are changed from the two DMRS symbols originally applied to the normal subframe to the DMRS symbols respectively applied to the two sets of subcarriers.
  • Embodiment 5B proposes, for an incomplete subframe including only one DMRS symbol, the number of layers designated for transmission specified by the uplink scheduling information as the number of layers transmitting the incomplete subframe, in the incomplete subframe
  • the subcarriers of the DMRS symbol of the incomplete subframe are divided into two groups, wherein the first group of DMRS subcarriers are used to demodulate a part of layers, and the second group of DMRS subcarriers are used to demodulate another part. Layers, and between layers corresponding to each subcarrier group, only cyclic shift is applied to achieve orthogonality between layers.
  • Fig. 8B schematically shows the principle of Embodiment 5B.
  • the subcarriers of the DMRS symbols of the incomplete subframe are divided into two groups of comb## and comb#1, and the comb#0DMRS subcarrier is used for demodulating, for example, layer #0 and layer #1, comb#1DMRS.
  • the subcarriers are used to demodulate, for example, layer #2 and layer #3, and between the layers corresponding to each subcarrier group, only cyclic shift is applied to achieve orthogonality between layers.
  • Table 4 in consideration of the comb structure of the DMRS symbol, Table 4 below may be defined.
  • Table 4 for example, the case indicated by the cyclic shift field "000”, the subcarriers of the DMRS symbols of the incomplete subframe are divided into two groups of comb#0 and comb#1, and the subcarrier group comb## is used.
  • subcarrier group comb#1 is used to demodulate, for example, layer #2 and layer #3, and between layers corresponding to each subcarrier group (for example, subcarrier group comb# 0 corresponds to layer #0 and layer #1, or between sub-carrier group comb#1 corresponding to layer #2 and layer #3), and only cyclic shift is applied to achieve orthogonal between layers.
  • the incomplete subframes including only one DMRS symbol can be implemented to implement the same number of orthogonal layers as the normal subframe.
  • Embodiment 6 of the present disclosure a transmission configuration manner in which various DMRSs described in the above embodiments can be dynamically switched for an incomplete subframe is also proposed.
  • the UE may determine which DMRS configuration mode is adopted according to receiving control signaling from the base station, for example, RRC or DCI, etc., thereby transmitting an incomplete subframe.
  • the UE may send a configuration manner of the DMRS for the incomplete subframe that the UE can support to the base station, so that the base station can schedule the incomplete subframe according to the configuration manner supported by the UE.
  • the uplink scheduling information UL grant can be configured to specify the number of layers of the uplink transmission of the scheduled normal subframe and the incomplete subframe, respectively, thereby improving flexibility and compatibility.
  • the uplink transmission may be configured to respectively specify the uplink transmission of the incomplete initial subframe and the incomplete termination subframe.
  • the number of layers may be configured to respectively specify the uplink transmission of the incomplete initial subframe and the incomplete termination subframe.
  • the uplink scheduling information when the uplink scheduling information specifies the number of layers of the uplink transmission of the scheduled incomplete subframe, it may be configured to specify that the incomplete start subframe and the incomplete end subframe use the same uplink transmission. The number of layers.
  • the foregoing describes in detail how the UE on the transmitting side of the UL subframe determines the transmission mode of the demodulation reference signal DMRS for the incomplete subframe, and how the base station eNodeB on the receiving side extracts the DMRS for the incomplete subframe, thereby Demodulation of incomplete subframes is described.
  • a method of demodulating an uplink incomplete subframe on an unlicensed spectrum includes: at step S900, at least one of a number of layers of an uplink transmission and a number of layers receiving an incomplete subframe specified according to uplink scheduling information, and an incomplete subframe Demodulating the reference signal DMRS symbol number, determining a configuration manner of the DMRS for the incomplete subframe; in step S910, extracting the DMRS based on the determined configuration manner of the DMRS, and demodulating the incomplete subframe by using the extracted DMRS.
  • Embodiment 8 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: determining whether the number of layers receiving the incomplete subframe is less than the number of layers designated for transmission specified by the uplink scheduling information; and the number of layers receiving the incomplete subframe is smaller than that specified by the uplink scheduling information
  • channel estimation is performed using the DMRS symbol.
  • channel estimation is performed using the DMRS symbol and an orthogonal cover code used when generating the DMRS symbol.
  • the orthogonal cover code may be the corresponding codeword in Table 1 above, or may be a preset value (for example, 1), or may be a value specified by uplink scheduling information.
  • This embodiment is applicable to demodulate the received incomplete subframe in the case where the UE side retires the layer transmitting the incomplete subframe.
  • This embodiment 8 corresponds to the first example in the above-described embodiment 1.
  • Embodiment 9 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: when the number of layers receiving the incomplete subframe is equal to the number of layers for transmission specified by the uplink scheduling information, and the incomplete subframe includes only one DMRS symbol, using the DMRS symbol for the channel estimate.
  • channel estimation is performed using the DMRS symbol and a cyclic shift value used when generating the DMRS symbol.
  • the orthogonal cover code OCC of the incomplete subframe of each layer may be configured to the same value when generating the DMRS symbol.
  • This embodiment is applicable to demodulating the received incomplete subframe in a case where the UE side performs back-off on the DMRS sequence of the incomplete subframe.
  • This embodiment 9 corresponds to the second example in the above-described embodiment 1.
  • Embodiment 10 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: when the number of layers receiving the incomplete subframe is equal to the number of layers for transmission specified by the uplink scheduling information, and the incomplete subframe includes only one DMRS symbol, The DMRS symbol included in the incomplete subframe and the DMRS symbol included in the adjacent slot of the adjacent subframe are used as the two DMRSs of the incomplete subframe.
  • the DMRS symbols included in the adjacent PDCCHs of the adjacent subframes and the DMRS symbols included in the adjacent slots of the adjacent subframes are used as the DMRSs for the incomplete subframes, thereby receiving the incomplete sub-frames.
  • the frame is demodulated. Specifically, for the incomplete starting subframe to be received, the DMRS symbol included in the incomplete starting subframe and the first DMRS symbol of the adjacent subsequent subframe may be utilized as the incomplete subframe.
  • the DMRS symbols included in the end subframe are used as two DMRSs for the incomplete subframe for demodulating the incomplete subframe.
  • the adjacent subframe may be an adjacent complete subframe or an adjacent incomplete subframe as long as it has one DMRS symbol on an adjacent time slot with an incomplete subframe to be scheduled.
  • This embodiment 10 corresponds to the above-described embodiment 2.
  • Embodiment 11 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: the number of layers receiving the incomplete subframe is equal to the number of layers for transmission specified by the uplink scheduling information, and the incomplete subframe is configured to not include the DMRS symbol, on each layer And using the DMRS symbol of the normal subframe adjacent to the incomplete subframe as the DMRS for the incomplete subframe.
  • the symbols of the two DMRSs included in the adjacent normal subframe are used as the DMRS for the incomplete subframe, thereby demodulating the received incomplete subframe.
  • the method includes: configuring the incomplete subframe to include no DMRS symbol by using a threshold indicated by the control signaling; or incomplete starting subframe and incomplete termination by respective separate control signaling
  • the frames are respectively configured not to include DMRS symbols; or the incomplete start subframe and the incomplete end subframe are configured together by common control signaling to not include the DMRS symbol.
  • This embodiment 11 corresponds to the above-described embodiment 3.
  • Embodiment 12 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: the number of layers receiving the incomplete subframe is equal to the number of layers for transmission specified by the uplink scheduling information, and the incomplete subframe includes two DMRS symbols, and the two DMRS symbols are used to
  • the complete subframe is demodulated, wherein the position of one DMRS symbol is the same as the position of the corresponding DMRS symbol of the normal subframe, the position of the other DMRS symbol is different from the position of the corresponding DMRS symbol of the normal subframe, and its position may be incomplete.
  • the start or end position of the frame is determined.
  • the detection of the start/end position of the incomplete subframe can be achieved.
  • This embodiment 12 corresponds to the above-described embodiment 4.
  • Embodiment 13 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: the number of layers receiving the incomplete subframe is equal to the number of layers for transmission specified by the uplink scheduling information, and when the incomplete subframe includes only one DMRS symbol, the DMRS symbol of the incomplete subframe is
  • the subcarriers are divided into two groups; for each transport layer, the two sets of subcarriers are used to provide two DMRS symbols for demodulating the incomplete subframe.
  • This embodiment 13 corresponds to the above-described embodiment 5A.
  • Embodiment 14 of the present disclosure proposes a method of demodulating an uplink incomplete subframe on an unlicensed spectrum.
  • the method includes: when the number of layers receiving the incomplete subframe is equal to the number of layers specified by the uplink scheduling information for transmission, and the incomplete subframe includes only one DMRS symbol, the DMRS symbol of the incomplete subframe.
  • the subcarriers are divided into two groups, wherein the first group of DMRS subcarriers are used to demodulate the incomplete subframes of a part of the layer, and the second group of DMRS subcarriers are used to demodulate the incomplete subframes of the other part of the layer.
  • This embodiment 14 corresponds to the above-described embodiment 5B.
  • Embodiment 15 of the present disclosure proposes a method of indicating a configuration manner of dynamically switching DMRS for an incomplete subframe by transmitting control signaling.
  • the method further includes: before sending the control instruction, receiving information indicating a configuration manner of the DMRS supported by the incomplete subframe.
  • Embodiment 16 of the present disclosure proposes a method of indicating the number of layers used for transmission of an incomplete subframe and a normal subframe by uplink scheduling information.
  • the method includes: configuring uplink scheduling information as a number of layers that can respectively specify an uplink transmission of the scheduled normal subframe and the incomplete subframe; wherein, the uplink scheduling information specifies the scheduled
  • the number of layers of the uplink transmission of the incomplete subframe may be configured to specify the number of layers of the uplink transmission of each of the incomplete start subframe and the incomplete end subframe, respectively; or be configured to specify an incomplete starter The number of layers in which the frame and the incomplete end subframe use the same uplink transmission.
  • a user equipment includes at least a processor configured to perform the above-described method of transmitting an uplink incomplete subframe on an unlicensed spectrum.
  • a user equipment includes at least a processor configured to perform the method of demodulating an uplink incomplete subframe on an unlicensed spectrum as described above.
  • a radio base station, a user terminal, or the like in an embodiment of the present disclosure can function as a computer that executes processing of the radio communication method of the present disclosure.
  • FIG. 10 shows an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present disclosure.
  • the radio base station 10 and the user terminal 20 described above may be configured as a computer device that physically includes the processor 1001, the memory 1002, the memory 1003, the communication device 1004, the input device 1005, the output device 1006, the bus 1007, and the like.
  • the hardware structures of the wireless base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or may not include some of the devices.
  • the processor 1001 only illustrates one, but may be multiple processors.
  • the processing may be performed by one processor, or may be performed by one or more processors simultaneously, sequentially, or by other methods.
  • the processor 1001 can be installed by more than one chip.
  • the functions of the wireless base station 10 and the user terminal 20 are realized, for example, by reading a predetermined software (program) into hardware such as the processor 1001 and the memory 1002, thereby causing the processor 1001 to perform an operation, and the communication device
  • the communication performed by 1004 is controlled, and the reading and/or writing of data in the memory 1002 and the memory 1003 is controlled.
  • the processor 1001 for example, causes the operating system to operate to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads out programs (program codes), software modules, data, and the like from the memory 1003 and/or the communication device 1004 to the memory 1002, and executes various processes in accordance therewith.
  • programs program codes
  • the program a program for causing a computer to execute at least a part of the operations described in the above embodiments can be employed.
  • the control unit 401 of the user terminal 20 can be implemented by a control program stored in the memory 1002 and operated by the processor 1001, and can be similarly implemented for other functional blocks.
  • the memory 1002 is a computer readable recording medium, and may be, for example, a read only memory (ROM), an EEPROM (Erasable Programmable ROM), an electrically programmable read only memory (EEPROM), or an electrically programmable read only memory (EEPROM). At least one of a random access memory (RAM) and other suitable storage medium is used.
  • the memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store an executable program (program code), a software module, and the like for implementing the wireless communication method according to an embodiment of the present disclosure.
  • the memory 1003 is a computer readable recording medium, and may be, for example, a flexible disk, a floppy disk, a magneto-optical disk (for example, a CD-ROM (Compact Disc ROM), a digital versatile disk, a Blu-ray. (Blu-ray, registered trademark) CD-ROM, removable disk, hard disk drive, smart card, flash memory device (eg card, stick, key driver), magnetic stripe, database, server, other appropriate At least one of the storage media is constructed.
  • the memory 1003 may also be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission and reception device) for performing communication between computers through a wired and/or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, and the like, for example.
  • the communication device 1004 may include a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to implement, for example, Frequency Division Duplex (FDD) and/or Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs an output to the outside.
  • the input device 1005 and the output device 1006 may also be an integrated structure (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected via a bus 1007 for communicating information.
  • the bus 1007 may be composed of a single bus or a different bus between devices.
  • the wireless base station 10 and the user terminal 20 may include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a programmable logic device (PLD).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • Hardware such as Field Programmable Gate Array (FPGA) can realize some or all of each functional block by this hardware.
  • the processor 1001 can be installed by at least one of these hardwares.
  • the channel and/or symbol can also be a signal (signaling).
  • the signal can also be a message.
  • the reference signal may also be simply referred to as an RS (Reference Signal), and may also be referred to as a pilot (Pilot), a pilot signal, or the like according to applicable standards.
  • a component carrier may also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
  • the radio frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe.
  • a subframe may be composed of one or more time slots in the time domain.
  • the subframe may be a fixed length of time (eg, 1 ms) that is independent of the numerology.
  • the time slot may have one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM), Single Carrier Frequency Division Multiple Access (SC-FDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) Symbols, etc.).
  • the time slot can also be a time unit based on parameter configuration.
  • the time slot may also include a plurality of minislots. Each minislot may be composed of one or more symbols in the time domain.
  • a minislot can also be referred to as a subslot.
  • Radio frames, subframes, time slots, mini-slots, and symbols all represent time units when signals are transmitted. Radio frames, subframes, time slots, mini-slots, and symbols can also use other names that correspond to each other.
  • one subframe may be referred to as a Transmission Time Interval (TTI), and a plurality of consecutive subframes may also be referred to as a TTI.
  • TTI Transmission Time Interval
  • One slot or one minislot may also be referred to as a TTI. That is to say, the subframe and/or the TTI may be a subframe (1 ms) in the existing LTE, or may be a period shorter than 1 ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms.
  • a unit indicating a TTI may also be referred to as a slot, a minislot, or the like instead of a subframe.
  • TTI refers to, for example, a minimum time unit scheduled in wireless communication.
  • the radio base station performs scheduling for all user terminals to allocate radio resources (bandwidth, transmission power, etc. usable in each user terminal) in units of TTIs.
  • the definition of TTI is not limited to this.
  • the TTI may be a channel-coded data packet (transport block), a code block, and/or a codeword transmission time unit, or may be a processing unit such as scheduling, link adaptation, or the like.
  • the time interval e.g., the number of symbols
  • actually mapped to the transport block, code block, and/or codeword may also be shorter than the TTI.
  • TTI time slot or one mini time slot
  • more than one TTI ie, more than one time slot or more than one micro time slot
  • the number of slots (the number of microslots) constituting the minimum time unit of the scheduling can be controlled.
  • a TTI having a length of 1 ms may also be referred to as a regular TTI (TTI in LTE Rel. 8-12), a standard TTI, a long TTI, a regular subframe, a standard subframe, or a long subframe.
  • TTI shorter than a conventional TTI may also be referred to as a compressed TTI, a short TTI, a partial TTI (partial or fractional TTI), a compressed subframe, a short subframe, a minislot, or a subslot.
  • a long TTI (eg, a regular TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • a short TTI eg, a compressed TTI, etc.
  • TTI length of the TTI may be replaced with 1 ms.
  • a resource block is a resource allocation unit of a time domain and a frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the RB may include one or more symbols in the time domain, and may also be one slot, one minislot, one subframe, or one TTI.
  • a TTI and a subframe may each be composed of one or more resource blocks.
  • one or more RBs may also be referred to as a physical resource block (PRB, Physical RB), a sub-carrier group (SCG), a resource element group (REG, a resource element group), a PRG pair, an RB pair, and the like. .
  • the resource block may also be composed of one or more resource elements (REs, Resource Elements).
  • REs resource elements
  • Resource Elements For example, one RE can be a subcarrier and a symbol of a radio resource area.
  • radio frames, subframes, time slots, mini-slots, symbols, and the like are merely examples.
  • the number of subframes included in the radio frame, the number of slots of each subframe or radio frame, the number of microslots included in the slot, the number of symbols and RBs included in the slot or minislot, and the number of RBs included in the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, and the length of the cyclic prefix (CP, Cyclic Prefix) can be variously changed.
  • the information, parameters, and the like described in the present specification may be expressed by absolute values, may be represented by relative values with predetermined values, or may be represented by other corresponding information.
  • wireless resources can be indicated by a specified index.
  • the formula or the like using these parameters may be different from those explicitly disclosed in the present specification.
  • the information, signals, and the like described in this specification can be expressed using any of a variety of different techniques.
  • data, commands, instructions, information, signals, bits, symbols, chips, etc. which may be mentioned in all of the above description, may pass voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of them. Combined to represent.
  • information, signals, and the like may be output from the upper layer to the lower layer, and/or from the lower layer to the upper layer.
  • Information, signals, etc. can be input or output via a plurality of network nodes.
  • Information or signals input or output can be stored in a specific place (such as memory) or managed by a management table. Information or signals input or output may be overwritten, updated or supplemented. The output information, signals, etc. can be deleted. The input information, signals, etc. can be sent to other devices.
  • the notification of the information is not limited to the mode/embodiment described in the specification, and may be performed by other methods.
  • the notification of the information may be through physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and upper layer signaling (for example, radio resource control).
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Media Access Control
  • the physical layer signaling may be referred to as L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may also be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • the MAC signaling can be notified, for example, by a MAC Control Unit (MAC CE).
  • MAC CE MAC Control Unit
  • the notification of the predetermined information is not limited to being explicitly performed, and may be performed implicitly (for example, by not notifying the predetermined information or by notifying the other information).
  • the determination can be performed by a value (0 or 1) represented by 1 bit, or by a true or false value (boolean value) represented by true (true) or false (false), and can also be compared by numerical values ( For example, comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, should be interpreted broadly to mean commands, command sets, code, code segments, program code, programs, sub- Programs, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, steps, functions, and the like.
  • software, commands, information, and the like may be transmitted or received via a transmission medium.
  • a transmission medium For example, when using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) from a website, server, or other remote source
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • base station (BS, Base Station)", “radio base station”, “eNB”, “gNB”, “cell”, “sector”, “cell group”, “carrier”, and “component carrier”
  • BS Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell a cell
  • cell group a carrier
  • component carrier a component carrier
  • the base station is sometimes referred to by a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femto cell, a small cell, and the like.
  • a base station can accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also pass through the base station subsystem (for example, a small indoor base station (RFH, remote head (RRH), Remote Radio Head))) to provide communication services.
  • the term "cell” or “sector” refers to a portion or the entirety of the coverage area of a base station and/or base station subsystem that performs communication services in the coverage.
  • the base station is sometimes referred to by a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femto cell, a small cell, and the like.
  • eNB eNodeB
  • Mobile stations are also sometimes used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless Terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms are used.
  • the wireless base station in this specification can also be replaced with a user terminal.
  • each mode/embodiment of the present disclosure can also be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user-to-device (D2D) devices.
  • D2D user-to-device
  • the function of the above-described wireless base station 10 can be regarded as a function of the user terminal 20.
  • words such as "upstream” and "downstream” can also be replaced with "side”.
  • the uplink channel can also be replaced with a side channel.
  • the user terminal in this specification can also be replaced with a wireless base station.
  • the function of the user terminal 20 described above can be regarded as a function of the wireless base station 10.
  • the node may be considered, for example, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW, etc.), or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • LTE-B Long-Term Evolution
  • LTE-Beyond Long-Term Evolution
  • Super 3rd generation mobile communication system SUPER 3G
  • IMT-Advanced advanced international mobile communication
  • 4th generation mobile communication system (4G, 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • future radio access FAA
  • new radio access technology New-RAT, Radio Access Technology
  • NR New Radio Access Technology
  • NX new radio access
  • FX Next Generation Wireless Access
  • GSM Registered trademark
  • GSM Global System for Mobile Communications
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra Wideband
  • any reference to a unit using the names "first”, “second”, etc., as used in this specification, does not fully limit the number or order of the units. These names can be used in this specification as a convenient method of distinguishing between two or more units. Thus, reference to a first element and a second element does not mean that only two elements may be employed or that the first element must prevail in the form of the second unit.
  • determination used in the present specification sometimes includes various actions. For example, regarding “judgment (determination)", calculation, calculation, processing, deriving, investigating, looking up (eg, table, database, or other) may be performed. Search in the data structure, ascertaining, etc. are considered to be “judgment (determination)”. Further, regarding “judgment (determination)”, reception (for example, receiving information), transmission (for example, transmission of information), input (input), output (output), and access (for example) may also be performed (for example, Accessing data in memory, etc. is considered to be “judgment (determination)”.
  • judgment (determination) it is also possible to consider “resolving”, “selecting”, selecting (choosing), establishing (comparing), comparing (comparing), etc. as “judging (determining)”. That is to say, regarding "judgment (determination)", several actions can be regarded as performing "judgment (determination)".
  • connection means any direct or indirect connection or combination between two or more units, This includes the case where there is one or more intermediate units between two units that are “connected” or “coupled” to each other.
  • the combination or connection between the units may be physical, logical, or a combination of the two.
  • connection can also be replaced with "access”.
  • two units may be considered to be electrically connected by using one or more wires, cables, and/or printed, and as a non-limiting and non-exhaustive example by using a radio frequency region.
  • the electromagnetic energy of the wavelength of the region, the microwave region, and/or the light is "connected” or "bonded” to each other.

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Abstract

提出了一种非授权频谱下传输和解调上行链路不完整子帧的方法，以及相应的用户设备和基站。其中，在非授权频谱下传输上行链路不完整子帧的方法，包括：根据上行链路调度信息UL grant指定的上行传输的层的数量和不完整子帧所支持的正交层的数量中的至少一项，以及不完整子帧包含的解调参考信号DMRS的符号数，为该不完整子帧确定DMRS的传输方式；以及利用所确定的DMRS传输方式，传输不完整子帧。根据本公开的传输方法，可以将不完整子帧的UL grant与正常子帧的UL grant相兼容，并且实现在尽可能多的正交层上传输子帧。

Description

不完整子帧的传输和解调方法、相应的用户设备和基站 技术领域
本公开涉及无线通信领域，具体涉及一种在非授权频谱上传输和解调上行链路不完整子帧的方法，以及相应的用户设备和基站。
背景技术
在传统的3GPP(3rd Generation Partner Project，第三代合作伙伴项目)系统中，数据传输只能发生在授权频谱上，然而随着业务量的急剧增大，授权频谱可能难以满足业务量的需求。为此，业界提出了对非授权频谱综合的研究。
在利用非授权频谱传输PUSCH(Physical Uplink Shared Channel，物理上行共享信道)的无线信号时，DMRS(Demodulation Reference Signal，解调参考信号)扮演着重要角色。DMRS主要用于eNodeB对上行物理信道进行信道估计以便正确地解调PUSCH，并且DMRS通常位于每个时隙(Slot)的倒数第4个SC-FDMA符号上。
图1示意性地示出了一个正常PUSCH子帧的结构。如图1所示，一个正常子帧的两个DMRS分别位于第一个时隙的第四个SC-FDMA符号处和第二个时隙的第四个SC-FDMA符号处。
对于PUSCH而言，在SU-MIMO(单用户-多输入多输出)中，同一UE会在不同层上发送数据，不同层上使用的不同DMRS需要彼此正交，以避免层间干扰。为保证不同DMRS之间的正交性，可以利用循环移位(cyclic shift)和包含两个码字的正交覆盖码(Orthogonal Cover Code,OCC)的配置来保证DMRS之间的正交性。例如，可以根据表格1中的
Figure PCTCN2018077841-appb-000001
和OCC的配置来提供DMRS之间的正交性。对于如图1所示的正常子帧而言，由于其具有两个DMRS，通过使用正交覆盖码并且结合循环移位，可以为每个UE配置最大四个正交层来传输PUSCH子帧数据。
Figure PCTCN2018077841-appb-000002
表格1
除了正常PUSCH子帧之外，在非授权频谱传输上还支持不完整子帧。在图2示意性地示出了不完整起始子帧和不完整结束子帧的示例。在不完整起始子帧和不完整结束子帧中，仅仅包括一个DMRS OFDM符号。更一般地，在长度小于或等于10个SC-FDMA符号数的不完整子帧(partial subframe)中，也是仅仅具有一个DMRS OFDM符号。而为了同时支持两个码字的正交覆盖码，子帧一般需要两个DMRS符号。因此，针对不完整子帧，目前的DMRS配置方式中无法同时支持正交覆盖码的两个码字，从而只能对DMRS进行循环移位，导致了最大仅仅支持两个正交层。
此外，在多子帧调度中(Multiple subframe scheduling,MSF)中，MIMO层对被调度的所有子帧是公共的。考虑到这一点，存在两种可能的非授权频谱UL调度方式：一种方式是针对不完整子帧和正常子帧采用单独的上行链路授权信息(UL grant)，另一种方式是，如果UL grant调度至少一个不完整子帧，则对所允许的所有子帧的最大MIMO层数进行限制。然而，上述调度方式存在至少以下缺陷。例如，第一种方式需要为不完整子帧和正常子帧分别配置不同的UL grant信息，增大了下行控制信令(Downlink Control Information,DCI)的开销；而第二种方式则限制了用于传输子帧的层数，降低了UL的传输效率。
发明内容
针对以上问题，本公开提出了一种在非授权频谱上传输和解调上行链路不完整子帧的方法，以及相应的用户设备和基站，从而可以将不完整子帧的UL grant与正常子帧的UL grant相兼容，并且实现在尽可能多的正交层上传输子帧。
根据本公开的一方面，提出了一种在非授权频谱上传输上行链路不完整子帧的方法，包括：根据上行链路调度信息指定的上行传输的层的数量和不完整子帧所支持的正交层的数量中的至少一项，以及不完整子帧包含的DMRS符号数，为该不完整子帧确定解调参考信号DMRS的传输方式；以及利用所确定的DMRS传输方式，传输不完整子帧。
根据本公开的另一方面，提出了一种在非授权频谱上解调上行链路不完整子帧的方法，包括：根据上行链路调度信息指定的上行传输的层的数量和接收不完整子帧的层的数量中的至少一项以及不完整子帧包含的解调参考信号DMRS符号数，为该不完整子帧确定DMRS的配置方式；基于所确定的DMRS的配置方式来提取DMRS，并且利用提取的DMRS对不完整子帧进行解调。
根据本公开的又一方面，提出了一种用户设备，包括被配置为执行上述的在非授权频谱上传输上行链路不完整子帧的方法的处理器。
根据本公开的另一方面，提出了一种基站，包括被配置为执行上述的在非授权频谱上解调上行链路不完整子帧的方法的处理器。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1示意性地示出了一个正常PUSCH子帧的结构。
图2示意性地示出了在以时隙边界开始的不完整起始子帧和以时隙边界结束的不完整结束子帧。
图3示意性地示出了本公开提出的一种在非授权频谱上传输上行链路不完整子帧的方法的流程图。
图4A-4B示意性地根据本公开的实施例1的原理。
图5示意性地根据本公开的实施例2的原理。
图6示意性地根据本公开的实施例3的原理。
图7A-7B示意性地根据本公开的实施例4的原理。
图8A-8B示意性地示出了本公开的实施例5的原理。
图9示意性地示出了本公开提出的一种在非授权频谱上解调上行链路不完整子帧的方法。
图10是示意性地示出本公开所涉及的基站和用户终端的硬件结构的示例。
具体实施方式
下面将结合附图对本公开实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，也属于本公开保护的范围。
根据本公开的第一方面，提出了一种在非授权频谱上传输上行链路不完整子帧的方法。如图3所示，该方法包括：在步骤S300，根据上行链路调度信息指定的上行传输的层的数量和不完整子帧所支持的正交层的数量中的至少一项，以及不完整子帧包含的DMRS符号数，为该不完整子帧确定解调参考信号DMRS的传输方式；以及在步骤S310，利用所确定的DMRS传输方式，传输不完整子帧。
根据本公开的第一方面提出的方法，可以基于上行链路调度信息UL grant指定的上行传输的层数和待调度的不完整子帧所支持的正交传输层的数量，并且考虑到不完整子帧包含的DMRS符号数，来为不完整子帧灵活地确定DMRS的传输方式；不但可以提高用于不完整子帧传输的上行调度与用于正常子帧传输的上行调度的兼容性，而且还可以使用尽可能多的正交层来传输不完整子帧，提高不完整子帧传输的效率。
以下将结合具体的实施例来详细描述该方法。
<实施例1>
在本公开的实施例1中，针对不完整子帧仅包含一个DMRS OFDM符 号OS的情况，提出了回退(fall back)传输的策略，以便使得对不完整子帧的调度与对正常子帧的调度能够兼容，避免为不完整子帧和正常子帧分别指定单独的UL grant信息。
具体地，在该实施例1中，所述回退可以包括对用于传输不完整子帧的层数进行回退的方式(下文中简称为层数回退，第一示例)，还可以包括对用于不完整子帧的DMRS序列进行回退的方式(下文中简称为序列回退，第二示例)。
图4A示意性地示出了该实施例1的第一示例的层数回退的情况。通过这种策略，如图4A所示的示例，UE将传输不完整子帧的层从基站在UL grant信息中指示的层数，例如四层，回退到不完整子帧所支持的彼此正交的两层。
如上所述，在不完整子帧只具有一个DMRS符号时，所允许的最大正交层为两层，因此，当UE判断基站通过上行调度信息UL grant指示UE传输子帧的层数为大于不完整子帧所支持的正交层的数量时，并且在该不完整子帧仅包含一个DMRS符号时，UE可以进行层数回退，即，将用于传输不完整子帧的层数从UL grant指示的层数回退到所允许的正交的层数。具体地，UE判断不完整子帧所支持的正交层的数量是否小于上行链路调度信息指定的用于传输的层的数量；在其所支持的正交层的数量小于上行链路调度信息指定的用于传输的层的数量时，并且该不完整子帧仅包括一个DMRS符号，该不完整子帧以其所支持的正交层的数量进行传输。例如，对于不完整子帧的每个传输层的DMRS可以应用上述表格1中的相应码字，其中，可以将用于不完整子帧的正交覆盖码的码字预设为1，或者可以应用上行链路调度信息指定的正交覆盖码。
在此情况下，对于循环移位而言，需要保证不同层间的循环移位值相差越大越好，以最小化层间(inter-layer)干扰。通过查询表格1可知，UE可以选择层间的循环移位值相差为6的层#0和层#1。如上所述，可以利用上述表格1中的相应码字；其中，可以将不完整子帧的正交覆盖码OCC配置为[1 1]，即，w (λ)(0)＝w (λ)(1)＝1，这种情形如以下的表格2示出；或者可以应用上行链路调度UL grant信息中指定的正交覆盖码。
Figure PCTCN2018077841-appb-000003
表格2
根据该示例，由于在彼此正交的两个层上传输DMRS，可以保证信道估计的准确性。
图4B示意性地示出了实施例1的第二示例的序列回退的情况。在该第二示例中，将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，不完整子帧在各层上仅应用上行链路调度信息指定的循环移位而不用正交覆盖码来产生DMRS符号。也就是说，例如如以下表格3所示，仅仅利用循环移位CS而不使用OCC来实现用于传输不完整子帧的层之间的正交性。例如，可以不用正交覆盖码，或者将各层的不完整子帧的正交覆盖码OCC均配置为相同的值。
Figure PCTCN2018077841-appb-000004
表格3
在该实施例中，不使用OCC，而循环移位CS遵循UL grant信息中的与上行链路相关的DCI格式[3]中的循环移位字段(Cyclic shift for DMRS and OCC index)字段中的指示。
根据该第二示例，可以实现与正常子帧相同的MIMO层数。
综上，根据实施例1，可以实现不完整子帧与完整子帧的UL调度机制的兼容性，并且对现有的针对正常子帧的传输机制的改动较小，简单且易于实现。
<实施例2>
在本公开的实施例2中，针对不完整子帧仅包含一个DMRS OS的情况，提出了另一种为不完整子帧确定DMRS传输方式的策略。图5示意性地示出了本公开的实施例2的原理。
具体而言，在实施例2中，将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，其中该不完整子帧仅包括一个DMRS符号，并且由多子帧调度机制与其它子帧一起调度；其中，在各个层上，该不完整子帧所包括的DMRS符号和相邻子帧的相邻时隙所包括的DMRS符号一起用于解调该不完整子帧。这里，所述相邻子帧可以是相邻的完整子帧或相邻的不完整子帧，只要其在与要调度的不完整子帧的相邻时隙上具有一个DMRS符号即可。
也就是说，在实施例2中，在确定不完整子帧的DMRS的传输方式时，相邻子帧的相邻时隙中包括的DMRS符号被借用，与不完整子帧所包括的一个DMRS符号进行组合，形成两个DMRS符号，从而可以采用与正常子帧类似的循环移位和正交覆盖码来保证用于传输不完整子帧的各层之间的正交性。
可选地，针对要调度的不完整起始子帧，可以向该不完整起始子帧所包含的DMRS符号和与之相邻的后一个子帧的第一个DMRS符号分别应用正交覆盖码的一个码字，例如，分别应用w (λ)(1)和w (λ)(0)。
可选地，针对要调度的不完整结束子帧，可以向该不完整结束子帧相邻的前一个子帧的第二个DMRS符号和该不完整结束子帧所包含的DMRS符号分别应用正交覆盖码的一个码子，例如，分别应用w (λ)(1)和w (λ)(0)。
在该实施例中，考虑到需要借用相邻子帧的相邻时隙一个DMRS符号，因此，通常利用多子帧调度机制将需要调度的不完整子帧与相邻子帧一起调度。
可选地，可以根据UL grant信息中Cyclic shift for DMRS and OCC index字段中的指示来设置对应于要调度的不完整起始子帧的正交覆盖码中的码 字w (λ)(0)以及设置对应于不完整结束子帧的正交覆盖码中的码字w (λ)(1)。
根据实施例2，通过借用相邻子帧的相邻时隙的DMRS，并且与不完整子帧自身包含的一个DMRS符号进行组合，可以实现不完整子帧以与正常子帧相同的正交层来进行传输。
根据本实施例，由于可以在最多四个正交层上传输DMRS，可以保证信道估计的准确性。
<实施例3>
在本公开的实施例3中，提出了利用相邻的正常子帧的两个DMRS来为不完整子帧确定DMRS传输方式的策略。图6示意性地示出了本公开的实施例3的原理。
具体而言，在实施例3中，将上行链路调度信息指定的用于传输的层数确定为对所调度的不完整子帧进行传输的层数，并且将不完整子帧配置为不包括DMRS符号。由于需要借用相邻的一个正常子帧的两个DMRS符号，因此，通常被调度的不完整子帧需要由多子帧调度机制与相邻的正常子帧一起调度。也就是说，在实施例3中，在传输不完整子帧时，所调度的不完整子帧自身可以不用配置DMRS符号，而是借用相邻的正常子帧所包含的两个DMRS符号，来确定用于被调度的不完整子帧的DMRS的传输方式。由于借用了正常子帧的两个DMRS符号，从而可以采用与正常子帧类似的循环移位和正交覆盖码来保证用于传输不完整子帧的各层之间的正交性。
可选地，针对要调度的不完整起始子帧，可以利用与之相邻的后一个正常子帧的两个DMRS符号，并且可以采用与正常子帧类似的循环移位和正交覆盖码来保证用于传输不完整子帧的各层之间的正交性。
可选地，针对要调度的不完整结束子帧，可以利用与之相邻的前一个正常子帧的两个DMRS符号，并且可以采用与正常子帧类似的循环移位和正交覆盖码来保证用于传输不完整子帧的各层之间的正交性。
可选地，可以通过RRC或DCI之类的信令将不完整子帧配置为在传输时自身不包括DMRS符号。例如，可以通过RCC(Radio Resource Control)信令来指示一阈值，当不完整子帧的符号数小于控制信令指示的一阈值时，将该不完整子帧配置为不包括DMRS符号。
可选地，通过各自单独的DCI将不完整起始子帧和不完整结束子帧分别 配置为不包括DMRS符号；或者，可以由共同的DCI控制信令将不完整起始子帧和不完整结束子帧一起配置为不包括DMRS符号。
在实施例3中，考虑到需要借用相邻的正常子帧的两个DMRS符号，因此，通常利用多子帧调度机制将需要调度的不完整子帧与相邻的正常子帧一起调度。
根据实施例3，通过借用相邻的正常子帧的两个DMRS符号，而不用在不完整子帧中包含DMRS，从而降低了DMRS的传输开销，同时可以在传输时实现与正常子帧相同的正交层。
<实施例4>
在本公开的实施例4中，针对不完整子帧仅包含一个DMRS OS的情况，提出了另一种为不完整子帧确定DMRS传输方式的策略。图7A-7B示意性地示出了本公开的实施例4的原理。
在实施例4中，为原先仅仅包含一个DMRS OS的不完整子帧添加另一个DMRS符号，以便使得不完整子帧与正常子帧所支持的最大正交层数相同。
具体而言，在实施例4中，将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，在不完整子帧原先仅包括一个位置与正常子帧的一个DMRS符号的位置相同的DMRS符号时，向不完整子帧添加另一个DMRS符号；其中，所添加的另一个DMRS符号与原先包括的DMRS符号一起用于解调该不完整子帧，所添加的另一个DMRS符号的位置与正常子帧的DMRS位置不同，并且添加的DMRS符号的位置可用于确定不完整子帧的开始或者结束位置。
实际上，根据本公开的实施例4，为不完整子帧定义了一种新的UL子帧格式。可选地，由基站通过控制信令通知给UE采用这种新的子帧格式的配置。
如上所述，正常子帧的两个DMRS符号分别位于子帧的两个时隙的第四个SC-FDMA符号处。在新的UL子帧格式中，DMRS符号的位置与正常子帧的DMRS符号的位置不完全相同，以下对此进行举例说明。
在非授权频谱传输模式下，在结束下行链路DL不完整子帧的传输之后，可以快速切换到传输UL不完整起始子帧，从而增加UL获取信道的可能性， 并且提高非授权频谱上的传输效率。
例如，DL不完整子帧传输结束时对应的DL不完整子帧占用的符号数可能为{3,6,9,10,11,12}，考虑到一个正常子帧占用14个符号数，由此对应的UL不完整起始子帧占用的符号数是{11，8，5，4，3，2}。下面简单地以{11，8，5}作为本实施例中的UL不完整起始子帧所占用的符号数来进行说明。
图7A示出了在这种新的UL子帧格式中可以配置DMRS符号的位置。例如，在DL子帧传输以符号#2结束时，UL子帧传输的开始位置为紧接的符号#3，因此，UL不完整起始子帧占用的最大符号数可以为11；考虑到UL不完整起始子帧第一个符号，如符号#3，的某一段起始时间可能被用于信道监听(LBT)，向不完整子帧添加另一个DMRS符号位于符号#4的位置处。由此，所添加的另一个DMRS符号的位置位于不完整起始子帧的第2符号位置。类似地，在DL子帧传输以符号#5结束时，UL子帧传输的开始位置为紧接的符号#6，不完整起始子帧占用的最大符号数可以为8；考虑UL LBT，向不完整子帧添加另一个DMRS符号位于符号#7的位置处；此时，所添加的另一个DMRS符号的位置也是位于不完整起始子帧的第2符号位置。由此可见，向不完整起始子帧所添加的另一个DMRS符号的位置可以用于指示不完整起始子帧的开始位置。在DL子帧传输以符号#8结束时，添加另一个DMRS符号的情况可以采用相同的原理，具体参见图7A的图示。
相应地，向原先仅包含一个DMRS符号的不完整结束子帧添加另一DMRS符号的情况与之类似。首先，不完整结束子帧占用的符号数需要考虑相应的不完整起始子帧占用的符号数以及在非授权频带上最大突发长度(Burst Length)。例如，相应的UL不完整起始子帧占用的符号数可能为{11,8,5,4,3,2}，而最大突发长度是4ms，则UL不完整结束子帧占用的符号数可能是{3，6，9，10，11，12}。下面简单地以{6，9，11}作为本实施例中的UL不完整结束子帧所占用的符号数来进行说明。
图7B示出了在这种新的UL子帧格式中可以配置DMRS符号的位置。例如，在UL不完整结束子帧占用的符号数为6，UL不完整结束子帧传输以符号#5结束时，向不完整结束子帧添加另一个DMRS符号位于符号#2或3的位置处。类似地，在UL不完整结束子帧占用的符号数为9，在UL子帧 传输以符号#8结束时，向不完整子帧添加另一个DMRS符号位于符号#7的位置处；由此可见，向不完整结束子帧所添加的另一个DMRS符号的位置可以用于指示不完整结束子帧的结束位置。在UL不完整结束子帧占用的符号数为11，UL子帧传输以符号#10结束，添加另一个DMRS符号的可以位于符号#9，具体参见图7B的图示。
在本实施例中，由于向仅包含一个DMRS符号的不完整子帧添加了另一个DMRS符号，从而可以采用与正常子帧类似的循环移位和正交覆盖码来保证DMRS在传输不完整子帧的各层之间的正交性。
根据本实施例，可以实现对不完整子帧的开始/结束位置的检测，并且实现与正常子帧相同数量的正交层。
<实施例5>
在本公开的实施例5中，针对不完整子帧仅包含一个DMRS OS的情况，提出了又一种为不完整子帧确定DMRS传输方式的策略。图8A-8B示意性地示出了本公开的实施例5的原理。
针对不完整子帧仅包含一个DMRS OS的情况，在本实施例中，提出了利用基于IFDMA的梳状结构来确定DMRS传输的策略。换句话说，在本实施例中，提出了可以利用子载波的正交性，针对仅包括一个DMRS符号的不完整子帧实现与正常子帧相同数量的正交层。
具体地，实施例5又可以细分为实施例5A和实施例5B。以下先针对实施例5A进行详细描述。
实施例5A针对仅包含一个DMRS符号的不完整子帧，提出了将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，将不完整子帧的DMRS符号的子载波分为两组；向两组子载波中的DMRS在同一层上应用相同的循环移位，并且将正交覆盖码应用到两组子载波中的DMRS中。
图8A示意性地示出了实施例5A的原理。如图8A所示，将不完整子帧的DMRS符号的子载波分为comb#0和comb#1两组，然后，在comb#0和comb#1两组中同一层上应用相同的循环移位，并且将正交覆盖码的两个码字分别应用到两组子载波中的DMRS。例如，comb#0应用w (λ)(0)，而comb#1应用w (λ)(1)。
通过这种方式，可以重用由表格1所示的UL grant指示的Cyclic shift for DMRS and OCC index的字段，无需进行改变。与常规应用OCC2的方式的不同主要在于，将正交覆盖码的两个码字由原先分别应用到正常子帧的两个DMRS符号改变为分别应用到两组子载波的DMRS符号上。
实施例5B针对仅包含一个DMRS符号的不完整子帧，提出了将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，在不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组，其中，第一组DMRS子载波用于解调一部分层，第二组DMRS子载波用于解调另一部分层，并且对每个子载波组对应的各层之间，仅应用循环移位实现层间的正交。
图8B示意性地示出了实施例5B的原理。如图8B所示，将不完整子帧的DMRS符号的子载波分为comb#0和comb#1两组，comb#0DMRS子载波用于解调例如层#0和层#1，comb#1DMRS子载波用于解调例如层#2和层#3，并且对每个子载波组对应的各层之间，仅应用循环移位实现层间的正交。
可选地，在实施例5B，考虑到DMRS符号的梳状结构，可以定义如下的表格4。在表格4中，例如，循环移位字段“000”所指示的情况，将不完整子帧的DMRS符号的子载波分为comb#0和comb#1两组，子载波组comb#0用于解调例如层#0和层#1，子载波组comb#1用于解调例如层#2和层#3，并且对每个子载波组对应的各层之间(例如，子载波组comb#0对应的层#0和层#1之间，或者子载波组comb#1对应的层#2和层#3之间)，仅应用循环移位实现层间的正交。
Figure PCTCN2018077841-appb-000005
表格4
在本实施例中，由于对DMRS符号子载波进行分组，利用子载波的正交性，也可以使得仅包含一个DMRS符号的不完整子帧实现与正常子帧相同数量的正交层。
<实施例6>
在本公开的实施例6中，还提出了可以对不完整子帧动态切换在上述实施例中所描述的各种DMRS的传输配置方式。
例如，UE可以根据从基站接收到控制信令，例如，RRC或者DCI等，来确定采用哪一种DMRS配置方式，从而传输不完整子帧。
可选地，UE可以向基站发送该UE所能够支持的针对不完整子帧的DMRS的配置方式，使得基站可以根据UE所支持的配置方式对不完整子帧进行调度。
<实施例7>
在本公开的实施例7中，提出了上行链路调度信息UL grant可被配置为分别指定所调度的正常子帧和不完整子帧的上行传输的层的数量，从而提高灵活性和兼容性。
可选地，在上行链路调度信息指定所调度的不完整子帧的上行传输的层的数量时，可被配置为分别指定不完整起始子帧和不完整结束子帧各自的上行传输的层的数量。
可选地，在上行链路调度信息指定所调度的不完整子帧的上行传输的层的数量时，可被配置为指定不完整起始子帧和不完整结束子帧采用相同的 上行传输的层的数量。
以上针对在UL子帧的发送侧的UE为不完整子帧确定解调参考信号DMRS的传输方式进行了详细描述，下面将针对接收侧的基站eNodeB如何提取用于不完整子帧的DMRS，从而解调不完整子帧进行说明。
根据本公开的第二方面，提出了一种在非授权频谱上解调上行链路不完整子帧的方法。如图9所示，该方法包括：在步骤S900，根据上行链路调度信息指定的上行传输的层的数量和接收不完整子帧的层的数量中的至少一项以及不完整子帧包含的解调参考信号DMRS符号数，为该不完整子帧确定DMRS的配置方式；在步骤S910，基于所确定的DMRS的配置方式来提取DMRS，并且利用提取的DMRS对不完整子帧进行解调。
由于在UL子帧的接收侧的基站eNodeB提取用于不完整子帧的DMRS从而解调不完整子帧的方式与在发送侧的UE为不完整子帧确定的解调参考信号DMRS的传输方式相关，因此以下结合实施例简要地描述解调不完整子帧的各个实施例，具体原理可以参见以上关于传输不完整子帧所描述的各个实施例。
<实施例8>
本公开的实施例8提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：判断接收不完整子帧的层的数量是否小于上行链路调度信息指定的用于传输的层的数量；在接收不完整子帧的层的数量小于上行链路调度信息指定的用于传输的层的数量，并且该不完整子帧仅包括一个DMRS符号时，利用该DMRS符号进行信道估计。具体地，利用该DMRS符号和生成该DMRS符号时所利用的正交覆盖码来进行信道估计。例如，所述正交覆盖码可以是上述表格1中的相应码字，或者可以是预设值(例如1)，或者可以是上行链路调度信息指定的值。
该实施例可适用于在UE侧对传输不完整子帧的层进行了回退的情形下对接收到的不完整子帧进行解调。该实施例8对应于上述实施例1中的第一示例。
<实施例9>
本公开的实施例9提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信 息指定的用于传输的层的数量时，并且该不完整子帧仅包括一个DMRS符号时，利用该DMRS符号进行信道估计。具体地，利用该DMRS符号和生成该DMRS符号时所利用的循环移位值来进行信道估计。例如，在生成DMRS符号时可以将各层的不完整子帧的正交覆盖码OCC均配置为相同的值。
该实施例可适用于在UE侧对不完整子帧的DMRS序列上进行了回退的情形对接收到的不完整子帧进行解调。该实施例9对应于上述实施例1中的第二示例。
<实施例10>
本公开的实施例10提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，并且该不完整子帧仅包括一个DMRS符号时，在各个层上，利用该不完整子帧所包括的DMRS符号和相邻子帧的相邻时隙所包括的DMRS符号作为该不完整子帧的两个DMRS。
在该实施例中，利用不完整子帧所包括的DMRS的符号和相邻子帧的相邻时隙所包括的DMRS符号来作为用于不完整子帧的DMRS，从而对接收的不完整子帧进行解调。具体地，针对要接收的不完整起始子帧，可以利用该不完整起始子帧所包含的DMRS符号和相邻的后一个子帧的第一个DMRS符号来作为用于不完整子帧的两个DMRS，用于解调该不完整子帧；针对要接收的不完整结束子帧，可以利用该不完整结束子帧相邻的前一个子帧的第二个DMRS符号和该不完整结束子帧所包含的DMRS符号来作为用于不完整子帧的两个DMRS，用于解调该不完整子帧。
这里，所述相邻子帧可以是相邻的完整子帧或相邻的不完整子帧，只要其在与要调度的不完整子帧的相邻时隙上具有一个DMRS符号即可。该实施例10对应于上述实施例2。
<实施例11>
本公开的实施例11提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，并且所述不完整子帧被配置为不包括DMRS符号时，在各个层上，利用与该不完整子帧相邻的正常子帧的DMRS符号 来作为用于该不完整子帧的DMRS。
在该实施例中，利用相邻的正常子帧所包括的两个DMRS的符号来作为用于不完整子帧的DMRS，从而对接收的不完整子帧进行解调。
可选地，该方法包括：通过控制信令指示的一阈值来将该不完整子帧配置为不包括DMRS符号；或者由各自单独的控制信令将不完整起始子帧和不完整结束子帧分别配置为不包括DMRS符号；或者由共同的控制信令将不完整起始子帧和不完整结束子帧一起配置为不包括DMRS符号。该实施例11对应于上述实施例3。
<实施例12>
本公开的实施例12提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，且不完整子帧包括两个DMRS符号，利用该两个DMRS符号来对不完整子帧进行解调，其中一个DMRS符号的位置与正常子帧的相应DMRS符号的位置相同，另一个DMRS符号的位置与正常子帧的相应DMRS符号的位置不同，并且其位置可由不完整子帧的开始或者结束位置来确定。
根据本实施例，可以实现对不完整子帧的开始/结束位置的检测。该实施例12对应于上述实施例4。
<实施例13>
本公开的实施例13提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，在不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组；对于每个传输层，利用这两组子载波提供2个DMRS符号，用于解调该不完整子帧。该实施例13对应于上述实施例5A。
<实施例14>
本公开的实施例14提出了一种在非授权频谱上解调上行链路不完整子帧的方法。该方法包括：在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，且不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组，其中，第一组DMRS子载 波用于解调一部分层的不完整子帧，第二组DMRS子载波用于解调另一部分层的不完整子帧。该实施例14对应于上述实施例5B。
<实施例15>
本公开的实施例15提出了通过发送控制信令来指示对不完整子帧动态切换DMRS的配置方式的方法。
可选地，上述方法还包括：在发送控制指令之前，接收用于指示针对不完整子帧所支持的DMRS的配置方式的信息。
<实施例16>
本公开的实施例16提出了一种通过上行链路调度信息来指示不完整子帧和正常子帧的传输使用的层的数量的方法。可选地，该方法包括：将上行链路调度信息配置为可分别指定所调度的正常子帧和不完整子帧的上行传输的层的数量；其中，在上行链路调度信息指定所调度的不完整子帧的上行传输的层的数量时，可被配置为分别指定不完整起始子帧和不完整结束子帧各自的上行传输的层的数量；或者被配置为指定不完整起始子帧和不完整结束子帧采用相同的上行传输的层的数量。
根据本公开的第三方面，提出了一种用户设备，其至少包括处理器，该处理器被配置为执行上述在非授权频谱上传输上行链路不完整子帧的方法。
根据本公开的第四方面，提出了一种用户设备，其至少包括处理器，该处理器被配置为执行上述在非授权频谱上解调上行链路不完整子帧的方法。
例如，本公开的一实施方式中的无线基站、用户终端等可以作为执行本公开的无线通信方法的处理的计算机来发挥功能。图10示出本公开的实施方式所涉及的无线基站和用户终端的硬件结构的示例。上述的无线基站10和用户终端20可以作为在物理上包括处理器1001、内存1002、存储器1003、通信装置1004、输入装置1005、输出装置1006、总线1007等的计算机装置来构成。
另外，在以下的说明中，“装置”这样的文字也可替换为电路、设备、单元等。无线基站10和用户终端20的硬件结构可以包括一个或多个图中所示的各装置，也可以不包括部分装置。
例如，处理器1001仅图示出一个，但也可以为多个处理器。此外，可以通过一个处理器来执行处理，也可以通过一个以上的处理器同时、依次、 或采用其它方法来执行处理。另外，处理器1001可以通过一个以上的芯片来安装。
无线基站10和用户终端20中的各功能例如通过如下方式实现：通过将规定的软件(程序)读入到处理器1001、内存1002等硬件上，从而使处理器1001进行运算，对由通信装置1004进行的通信进行控制，并对内存1002和存储器1003中的数据的读出和/或写入进行控制。
处理器1001例如使操作系统进行工作从而对计算机整体进行控制。处理器1001可以由包括与周边装置的接口、控制装置、运算装置、寄存器等的中央处理器(CPU，Central Processing Unit)构成。
此外，处理器1001将程序(程序代码)、软件模块、数据等从存储器1003和/或通信装置1004读出到内存1002，并根据它们执行各种处理。作为程序，可以采用使计算机执行在上述实施方式中说明的动作中的至少一部分的程序。例如，用户终端20的控制单元401可以通过保存在内存1002中并通过处理器1001来工作的控制程序来实现，对于其它功能块，也可以同样地来实现。
内存1002是计算机可读取记录介质，例如可以由只读存储器(ROM，Read Only Memory)、可编程只读存储器(EPROM，Erasable Programmable ROM)、电可编程只读存储器(EEPROM，Electrically EPROM)、随机存取存储器(RAM，Random Access Memory)、其它适当的存储介质中的至少一个来构成。内存1002也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存1002可以保存用于实施本公开的一实施方式所涉及的无线通信方法的可执行程序(程序代码)、软件模块等。
存储器1003是计算机可读取记录介质，例如可以由软磁盘(flexible disk)、软盘(floppy disk)、磁光盘(例如，只读光盘(CD-ROM(Compact Disc ROM)等)、数字通用光盘、蓝光(Blu-ray，注册商标)光盘)、可移动磁盘、硬盘驱动器、智能卡、闪存设备(例如，卡、棒(stick)、密钥驱动器(key driver))、磁条、数据库、服务器、其它适当的存储介质中的至少一个来构成。存储器1003也可以称为辅助存储装置。
通信装置1004是用于通过有线和/或无线网络进行计算机间的通信的硬件(发送接收设备)，例如也称为网络设备、网络控制器、网卡、通信模块等。通信装置1004为了实现例如频分双工(FDD，Frequency Division Duplex) 和/或时分双工(TDD，Time Division Duplex)，可以包括高频开关、双工器、滤波器、频率合成器等。
输入装置1005是接受来自外部的输入的输入设备(例如，键盘、鼠标、麦克风、开关、按钮、传感器等)。输出装置1006是实施向外部的输出的输出设备(例如，显示器、扬声器、发光二极管(LED，Light Emitting Diode)灯等)。另外，输入装置1005和输出装置1006也可以为一体的结构(例如触控面板)。
此外，处理器1001、内存1002等各装置通过用于对信息进行通信的总线1007连接。总线1007可以由单一的总线构成，也可以由装置间不同的总线构成。
此外，无线基站10和用户终端20可以包括微处理器、数字信号处理器(DSP，Digital Signal Processor)、专用集成电路(ASIC，Application Specific Integrated Circuit)、可编程逻辑器件(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)等硬件，可以通过该硬件来实现各功能块的部分或全部。例如，处理器1001可以通过这些硬件中的至少一个来安装。
(变形例)
另外，关于本说明书中说明的用语和/或对本说明书进行理解所需的用语，可以与具有相同或类似含义的用语进行互换。例如，信道和/或符号也可以为信号(信令)。此外，信号也可以为消息。参考信号也可以简称为RS(Reference Signal)，根据所适用的标准，也可以称为导频(Pilot)、导频信号等。此外，分量载波(CC，Component Carrier)也可以称为小区、频率载波、载波频率等。
此外，无线帧在时域中可以由一个或多个期间(帧)构成。构成无线帧的该一个或多个期间(帧)中的每一个也可以称为子帧。进而，子帧在时域中可以由一个或多个时隙构成。子帧可以是不依赖于参数配置(numerology)的固定的时间长度(例如1ms)。
进而，时隙在时域中可以由一个或多个符号(正交频分复用(OFDM，Orthogonal Frequency Division Multiplexing)符号、单载波频分多址(SC-FDMA，Single Carrier Frequency Division Multiple Access)符号等)构成。此外，时隙也可以是基于参数配置的时间单元。此外，时隙还可以包括 多个微时隙。各微时隙在时域中可以由一个或多个符号构成。此外，微时隙也可以称为子时隙。
无线帧、子帧、时隙、微时隙以及符号均表示传输信号时的时间单元。无线帧、子帧、时隙、微时隙以及符号也可以使用各自对应的其它名称。例如，一个子帧可以被称为传输时间间隔(TTI，Transmission Time Interval)，多个连续的子帧也可以被称为TTI，一个时隙或一个微时隙也可以被称为TTI。也就是说，子帧和/或TTI可以是现有的LTE中的子帧(1ms)，也可以是短于1ms的期间(例如1～13个符号)，还可以是长于1ms的期间。另外，表示TTI的单元也可以称为时隙、微时隙等而非子帧。
在此，TTI例如是指无线通信中调度的最小时间单元。例如，在LTE系统中，无线基站对各用户终端进行以TTI为单位分配无线资源(在各用户终端中能够使用的频带宽度、发射功率等)的调度。另外，TTI的定义不限于此。
TTI可以是经过信道编码的数据包(传输块)、码块、和/或码字的发送时间单元，也可以是调度、链路适配等的处理单元。另外，在给出TTI时，实际上与传输块、码块、和/或码字映射的时间区间(例如符号数)也可以短于该TTI。
另外，一个时隙或一个微时隙被称为TTI时，一个以上的TTI(即一个以上的时隙或一个以上的微时隙)也可以成为调度的最小时间单元。此外，构成该调度的最小时间单元的时隙数(微时隙数)可以受到控制。
具有1ms时间长度的TTI也可以称为常规TTI(LTE Rel.8-12中的TTI)、标准TTI、长TTI、常规子帧、标准子帧、或长子帧等。短于常规TTI的TTI也可以称为压缩TTI、短TTI、部分TTI(partial或fractional TTI)、压缩子帧、短子帧、微时隙、或子时隙等。
另外，长TTI(例如常规TTI、子帧等)也可以用具有超过1ms的时间长度的TTI来替换，短TTI(例如压缩TTI等)也可以用具有比长TTI的TTI长度短且1ms以上的TTI长度的TTI来替换。
资源块(RB，Resource Block)是时域和频域的资源分配单元，在频域中，可以包括一个或多个连续的副载波(子载波(subcarrier))。此外，RB在时域中可以包括一个或多个符号，也可以为一个时隙、一个微时隙、一个子帧或一个TTI的长度。一个TTI、一个子帧可以分别由一个或多个资源块构成。另外，一个或多个RB也可以称为物理资源块(PRB，Physical RB)、 子载波组(SCG，Sub-Carrier Group)、资源单元组(REG，Resource Element Group)、PRG对、RB对等。
此外，资源块也可以由一个或多个资源单元(RE，Resource Element)构成。例如，一个RE可以是一个子载波和一个符号的无线资源区域。
另外，上述的无线帧、子帧、时隙、微时隙以及符号等的结构仅仅为示例。例如，无线帧中包括的子帧数、每个子帧或无线帧的时隙数、时隙内包括的微时隙数、时隙或微时隙中包括的符号和RB的数目、RB中包括的子载波数、以及TTI内的符号数、符号长度、循环前缀(CP，Cyclic Prefix)长度等的结构可以进行各种各样的变更。
此外，本说明书中说明的信息、参数等可以用绝对值来表示，也可以用与规定值的相对值来表示，还可以用对应的其它信息来表示。例如，无线资源可以通过规定的索引来指示。进一步地，使用这些参数的公式等也可以与本说明书中明确公开的不同。
在本说明书中用于参数等的名称在任何方面都并非限定性的。例如，各种各样的信道(物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)、物理下行链路控制信道(PDCCH，Physical Downlink Control Channel)等)和信息单元可以通过任何适当的名称来识别，因此为这些各种各样的信道和信息单元所分配的各种各样的名称在任何方面都并非限定性的。
本说明书中说明的信息、信号等可以使用各种各样不同技术中的任意一种来表示。例如，在上述的全部说明中可能提及的数据、命令、指令、信息、信号、比特、符号、芯片等可以通过电压、电流、电磁波、磁场或磁性粒子、光场或光子、或者它们的任意组合来表示。
此外，信息、信号等可以从上层向下层、和/或从下层向上层输出。信息、信号等可以经由多个网络节点进行输入或输出。
输入或输出的信息、信号等可以保存在特定的场所(例如内存)，也可以通过管理表进行管理。输入或输出的信息、信号等可以被覆盖、更新或补充。输出的信息、信号等可以被删除。输入的信息、信号等可以被发往其它装置。
信息的通知并不限于本说明书中说明的方式/实施方式，也可以通过其它方法进行。例如，信息的通知可以通过物理层信令(例如，下行链路控制信息(DCI，Downlink Control Information)、上行链路控制信息(UCI，Uplink  Control Information))、上层信令(例如，无线资源控制(RRC，Radio Resource Control)信令、广播信息(主信息块(MIB，Master Information Block)、系统信息块(SIB，System Information Block)等)、媒体存取控制(MAC，Medium Access Control)信令)、其它信号或者它们的组合来实施。
另外，物理层信令也可以称为L1/L2(第1层/第2层)控制信息(L1/L2控制信号)、L1控制信息(L1控制信号)等。此外，RRC信令也可以称为RRC消息，例如可以为RRC连接建立(RRC Connection Setup)消息、RRC连接重配置(RRC Connection Reconfiguration)消息等。此外，MAC信令例如可以通过MAC控制单元(MAC CE(Control Element))来通知。
此外，规定信息的通知(例如，“为X”的通知)并不限于显式地进行，也可以隐式地(例如，通过不进行该规定信息的通知，或者通过其它信息的通知)进行。
关于判定，可以通过由1比特表示的值(0或1)来进行，也可以通过由真(true)或假(false)表示的真假值(布尔值)来进行，还可以通过数值的比较(例如与规定值的比较)来进行。
软件无论被称为软件、固件、中间件、微代码、硬件描述语言，还是以其它名称来称呼，都应宽泛地解释为是指命令、命令集、代码、代码段、程序代码、程序、子程序、软件模块、应用程序、软件应用程序、软件包、例程、子例程、对象、可执行文件、执行线程、步骤、功能等。
此外，软件、命令、信息等可以经由传输介质被发送或接收。例如，当使用有线技术(同轴电缆、光缆、双绞线、数字用户线路(DSL，Digital Subscriber Line)等)和/或无线技术(红外线、微波等)从网站、服务器、或其它远程资源发送软件时，这些有线技术和/或无线技术包括在传输介质的定义内。
本说明书中使用的“系统”和“网络”这样的用语可以互换使用。
在本说明书中，“基站(BS，Base Station)”、“无线基站”、“eNB”、“gNB”、“小区”、“扇区”、“小区组”、“载波”以及“分量载波”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当基站容纳多个小区时，基站的整个覆盖区域可以划分为多个更小的区域，每个更小的区域也可以通过基站子系统(例如，室内用小型基站(射频拉远头(RRH， Remote Radio Head)))来提供通信服务。“小区”或“扇区”这样的用语是指在该覆盖中进行通信服务的基站和/或基站子系统的覆盖区域的一部分或整体。
在本说明书中，“移动台(MS，Mobile Station)”、“用户终端(user terminal)”、“用户装置(UE，User Equipment)”以及“终端”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
移动台有时也被本领域技术人员以用户台、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户台、接入终端、移动终端、无线终端、远程终端、手持机、用户代理、移动客户端、客户端或者若干其它适当的用语来称呼。
此外，本说明书中的无线基站也可以用用户终端来替换。例如，对于将无线基站和用户终端间的通信替换为多个用户终端间(D2D，Device-to-Device)的通信的结构，也可以应用本公开的各方式/实施方式。此时，可以将上述的无线基站10所具有的功能当作用户终端20所具有的功能。此外，“上行”和“下行”等文字也可以替换为“侧”。例如，上行信道也可以替换为侧信道。
同样，本说明书中的用户终端也可以用无线基站来替换。此时，可以将上述的用户终端20所具有的功能当作无线基站10所具有的功能。
在本说明书中，设为通过基站进行的特定动作根据情况有时也通过其上级节点(upper node)来进行。显然，在具有基站的由一个或多个网络节点(network nodes)构成的网络中，为了与终端间的通信而进行的各种各样的动作可以通过基站、除基站之外的一个以上的网络节点(可以考虑例如移动管理实体(MME，Mobility Management Entity)、服务网关(S-GW，Serving-Gateway)等，但不限于此)、或者它们的组合来进行。
本说明书中说明的各方式/实施方式可以单独使用，也可以组合使用，还可以在执行过程中进行切换来使用。此外，本说明书中说明的各方式/实施方式的处理步骤、序列、流程图等只要没有矛盾，就可以更换顺序。例如，关于本说明书中说明的方法，以示例性的顺序给出了各种各样的步骤单元，而并不限定于给出的特定顺序。
本说明书中说明的各方式/实施方式可以应用于利用长期演进(LTE，Long Term Evolution)、高级长期演进(LTE-A，LTE-Advanced)、超越长期演进(LTE-B，LTE-Beyond)、超级第3代移动通信系统(SUPER 3G)、高级国际移动通信(IMT-Advanced)、第4代移动通信系统(4G，4th generation mobile communication system)、第5代移动通信系统(5G，5th generation mobile communication system)、未来无线接入(FRA，Future Radio Access)、新无线接入技术(New-RAT，Radio Access Technology)、新无线(NR，New Radio)、新无线接入(NX，New radio access)、新一代无线接入(FX，Future generation radio access)、全球移动通信系统(GSM(注册商标)，Global System for Mobile communications)、码分多址接入2000(CDMA2000)、超级移动宽带(UMB，Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi(注册商标))、IEEE 802.16(WiMAX(注册商标))、IEEE 802.20、超宽带(UWB，Ultra-WideBand)、蓝牙(Bluetooth(注册商标))、其它适当的无线通信方法的系统和/或基于它们而扩展的下一代系统。
本说明书中使用的“根据”这样的记载，只要未在其它段落中明确记载，则并不意味着“仅根据”。换言之，“根据”这样的记载是指“仅根据”和“至少根据”这两者。
本说明书中使用的对使用“第一”、“第二”等名称的单元的任何参照，均非全面限定这些单元的数量或顺序。这些名称可以作为区别两个以上单元的便利方法而在本说明书中使用。因此，第一单元和第二单元的参照并不意味着仅可采用两个单元或者第一单元必须以若干形式占先于第二单元。
本说明书中使用的“判断(确定)(determining)”这样的用语有时包含多种多样的动作。例如，关于“判断(确定)”，可以将计算(calculating)、推算(computing)、处理(processing)、推导(deriving)、调查(investigating)、搜索(looking up)(例如表、数据库、或其它数据结构中的搜索)、确认(ascertaining)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，也可以将接收(receiving)(例如接收信息)、发送(transmitting)(例如发送信息)、输入(input)、输出(output)、存取(accessing)(例如存取内存中的数据)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，还可以将解决(resolving)、选择(selecting)、选定(choosing)、建立(establishing)、比较(comparing)等视为是进行“判断(确定)”。也就是说，关于“判断(确定)”，可以将若干动作视为是进行“判断(确定)”。
本说明书中使用的“连接的(connected)”、“结合的(coupled)”这样的用语或者它们的任何变形是指两个或两个以上单元间的直接的或间接的任何连接或结合，可以包括以下情况：在相互“连接”或“结合”的两个单元间，存在一个或一个以上的中间单元。单元间的结合或连接可以是物理上的，也可以是逻辑上的，或者还可以是两者的组合。例如，“连接”也可以替换为“接入”。在本说明书中使用时，可以认为两个单元是通过使用一个或一个以上的电线、线缆、和/或印刷电气连接，以及作为若干非限定性且非穷尽性的示例，通过使用具有射频区域、微波区域、和/或光(可见光及不可见光这两者)区域的波长的电磁能等，被相互“连接”或“结合”。
在本说明书或权利要求书中使用“包括(including)”、“包含(comprising)”、以及它们的变形时，这些用语与用语“具备”同样是开放式的。进一步地，在本说明书或权利要求书中使用的用语“或(or)”并非是异或。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开实施例公开的技术范围内，可轻易想到的变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应该以权利要求的保护范围为准。

Claims (26)

  1. 一种在非授权频谱上传输上行链路不完整子帧的方法，包括：
    根据上行链路调度信息指定的上行传输的层的数量和不完整子帧所支持的正交层的数量中的至少一项，以及不完整子帧包含的解调参考信号DMRS符号数，为该不完整子帧确定DMRS的传输方式；以及
    利用所确定的DMRS传输方式，传输不完整子帧。
  2. 根据权利要求1所述的方法，还包括：
    判断不完整子帧所支持的正交层的数量是否小于上行链路调度信息指定的用于传输的层的数量；
    在其所支持的正交层的数量小于上行链路调度信息指定的用于传输的层的数量时，并且该不完整子帧仅包括一个DMRS符号，该不完整子帧以其所支持的正交层进行传输，其中，
    不完整子帧的DMRS应用码字都为1的正交覆盖码或者应用上行链路调度信息指定的正交覆盖码。
  3. 根据权利要求1所述的方法，其中，将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，不完整子帧在各层上仅应用上行链路调度信息指定的循环移位，而不用正交覆盖码或者应用码字都为1的正交覆盖码来产生DMRS符号。
  4. 根据权利要求1所述的方法，还包括：
    将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，其中该不完整子帧仅包括一个DMRS符号，并且由多子帧调度机制与其它子帧一起调度，
    其中，在各个层上，该不完整子帧所包括的DMRS符号和相邻子帧的相邻时隙所包括的DMRS符号一起用于解调该不完整子帧。
  5. 根据权利要求1所述的方法，还包括：
    将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，所述不完整子帧被配置为不包括DMRS符号，并且由多子帧调度机制与相邻正常子帧一起调度，
    其中，在各个层上，与该不完整子帧相邻的正常子帧的DMRS用于解调 该不完整子帧。
  6. 根据权利要求5的方法，其中
    在不完整子帧的符号数小于控制信令指示的一阈值时，该不完整子帧被配置为不包括DMRS符号；或者
    由各自单独的控制信令将不完整起始子帧和不完整结束子帧分别配置为不包括DMRS符号；或者
    由共同的控制信令将不完整起始子帧和不完整结束子帧一起配置为不包括DMRS符号。
  7. 根据权利要求1所述的方法，还包括：
    将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，
    在不完整子帧原先仅包括一个位置与正常子帧的一个DMRS符号的位置相同的DMRS符号时，向不完整子帧添加另一个DMRS符号；其中，所添加的另一个DMRS符号与原先包括的DMRS符号一起用于解调该不完整子帧，所添加的另一个DMRS符号的位置与正常子帧的DMRS位置不同，并且添加的DMRS符号的位置可用于确定不完整子帧的开始或者结束位置。
  8. 根据权利要求1所述的方法，其中，
    将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，
    在不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组；
    向两组子载波中的DMRS在同一层上应用相同的循环移位，并且将正交覆盖码应用到两组子载波中的DMRS中。
  9. 根据权利要求1所述的方法，其中，
    将上行链路调度信息指定的用于传输的层的数量确定为传输该不完整子帧的层的数量，
    在不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组，其中，第一组DMRS子载波用于解调一部分层，第二组DMRS子载波用于解调另一部分层，并且对各个组对应的层之间，仅应用循环移位实现层间的正交。
  10. 根据权利要求2-9任一项所述的方法，还包括：
    根据接收到的控制信令对不完整子帧动态切换DMRS的配置方式。
  11. 根据权利要求10的方法，还包括：
    在进行DMRS配置之前，发送用于指示不完整子帧所支持的DMRS的配置方式的信息。
  12. 根据权利要求1-9任一项所述的方法，其中，上行链路调度信息可被配置为分别指定所调度的正常子帧和不完整子帧的上行传输的层的数量；
    其中，在上行链路调度信息指定所调度的不完整子帧的上行传输的层的数量时，可分别指定不完整起始子帧和不完整结束子帧各自的上行传输的层的数量；或者由共同的控制信令指定不完整起始子帧和不完整结束子帧采用的同一的上行传输的层的数量。
  13. 一种在非授权频谱上解调上行链路不完整子帧的方法，包括：
    根据上行链路调度信息指定的上行传输的层的数量和接收不完整子帧的层的数量中的至少一项以及不完整子帧包含的解调参考信号DMRS符号数，为该不完整子帧确定DMRS的配置方式；
    基于所确定的DMRS的配置方式来提取DMRS，并且利用提取的DMRS对不完整子帧进行解调。
  14. 根据权利要求13所述的方法，还包括：
    判断接收不完整子帧的层的数量是否小于上行链路调度信息指定的用于传输的层的数量；
    在接收不完整子帧的层的数量小于上行链路调度信息指定的用于传输的层的数量，并且该不完整子帧仅包括一个DMRS符号时，利用该DMRS符号用于对该不完整子帧进行解调；其中，
    该不完整子帧以其所支持的正交层进行传输，不完整子帧的DMRS应用码字都为1的正交覆盖码或者应用上行链路调度信息指定的正交覆盖码。
  15. 根据权利要求13所述的方法，其中，在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量时，并且该不完整子帧仅包括一个DMRS符号时，利用该DMRS符号用于对该不完整子帧进行解调；其中，
    该不完整子帧在各层上仅应用上行链路调度信息指定的循环移位而不 用正交覆盖码或者应用码字都为1的正交覆盖码来产生DMRS符号。
  16. 根据权利要求13所述的方法，还包括：
    在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，并且该不完整子帧仅包括一个DMRS符号时，
    在各个层上，利用该不完整子帧所包括的DMRS符号和相邻子帧的相邻时隙所包括的DMRS符号来作为该不完整子帧的两个DMRS，用于对该不完整子帧进行解调。
  17. 根据权利要求13所述的方法，还包括：
    在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，并且所述不完整子帧被配置为不包括DMRS符号时，
    在各个层上，利用与该不完整子帧相邻的正常子帧的DMRS符号来作为用于该不完整子帧的DMRS，用于对该不完整子帧进行解调。
  18. 根据权利要求17的方法，其中
    通过控制信令指示的一阈值来将该不完整子帧配置为不包括DMRS符号；或者
    由各自单独的控制信令将不完整起始子帧和不完整结束子帧分别配置为不包括DMRS符号；或者
    由共同的控制信令将不完整起始子帧和不完整结束子帧一起配置为不包括DMRS符号。
  19. 根据权利要求13所述的方法，还包括：
    在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，且不完整子帧包括两个DMRS符号，利用该两个DMRS符号来作为用于该不完整子帧的DMRS，用于对该不完整子帧进行解调，其中一个DMRS符号的位置与正常子帧的相应DMRS符号的位置相同，另一个DMRS符号的位置与正常子帧的相应DMRS符号的位置不同，并且其位置由不完整子帧的开始或者结束位置来确定或者由接收端检测确定。
  20. 根据权利要求13所述的方法，其中，
    在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，在不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组；
    对于每个传输层，根据这两组子载波，解调该不完整子帧；其中，
    这两组子载波中的DMRS使用了正交覆盖码，并且在同一层上应用相同的循环移位。
  21. 根据权利要求13所述的方法，其中，
    在接收不完整子帧的层的数量等于上行链路调度信息指定的用于传输的层的数量，且不完整子帧仅包括一个DMRS符号时，将不完整子帧的DMRS符号的子载波分为两组，其中，将第一组DMRS子载波用于解调不完整子帧的一部分层，将第二组DMRS子载波用于解调不完整子帧的另一部分层。
  22. 根据权利要求14-21任一项所述的方法，还包括：
    发送控制信令来指示对不完整子帧动态切换DMRS的配置方式。
  23. 根据权利要求22的方法，还包括：
    在发送控制指令之前，接收用于指示针对不完整子帧所支持的DMRS的配置方式的信息。
  24. 根据权利要求13-21任一项所述的方法，其中，将上行链路调度信息配置为可分别指定所调度的正常子帧和不完整子帧的上行传输的层的数量；
    其中，在上行链路调度信息指定所调度的不完整子帧的上行传输的层的数量时，可分别指定不完整起始子帧和不完整结束子帧各自的上行传输的层的数量；或者由共同控制信令指定不完整起始子帧和不完整结束子帧采用的同一的上行传输的层的数量。
  25. 一种用户设备，包括：
    处理器，被配置为执行权利要求1-12任一项所述的方法。
  26. 一种基站，包括：
    处理器，被配置为执行权利要求13-24任一项所述的方法。
PCT/CN2018/077841 2017-05-04 2018-03-02 不完整子帧的传输和解调方法、相应的用户设备和基站 WO2018201785A1 (zh)

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