WO2018228516A1 - 一种探测参考信号传输方法、基站和用户设备 - Google Patents

一种探测参考信号传输方法、基站和用户设备 Download PDF

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Publication number
WO2018228516A1
WO2018228516A1 PCT/CN2018/091434 CN2018091434W WO2018228516A1 WO 2018228516 A1 WO2018228516 A1 WO 2018228516A1 CN 2018091434 W CN2018091434 W CN 2018091434W WO 2018228516 A1 WO2018228516 A1 WO 2018228516A1
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Prior art keywords
srs
ues
type
base station
configuration information
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PCT/CN2018/091434
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English (en)
French (fr)
Inventor
王新
那崇宁
但黎琳
杨杰
张毅
肖悦
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NTT Docomo Inc
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NTT Docomo Inc
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Priority to CN201880039743.6A priority Critical patent/CN110870241A/zh
Priority to US16/622,699 priority patent/US11228463B2/en
Publication of WO2018228516A1 publication Critical patent/WO2018228516A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • 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
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a sounding reference signal transmission method, a base station, and a user equipment.
  • the Sounding Reference Signal is a signal that the UE transmits to the base station to measure the channel state and perform channel estimation. Specifically, the UE sends the uplink SRS according to the indication of the base station, and the base station determines the uplink channel state information of the UE according to the received SRS, and performs corresponding frequency domain selection scheduling, power control, and the like according to the obtained channel state information.
  • a UE that uses a wider bandwidth for data transmission is proposed.
  • a UE that uses a wider bandwidth for data transmission has an advantage of faster data transmission speed.
  • the base station needs to configure the transmission resources of multiple UEs of the SRS that need to be transmitted in one time-frequency resource unit, so that the SRSs of the multiple UEs are orthogonal.
  • a sounding reference signal (SRS) transmission method which is performed by a base station, and includes: generating SRS configuration information of at least two UEs, such that SRS of the first type of UEs in the at least two UEs And SRS non-orthogonal with the SRS of the at least two UEs; sending SRS configuration information of the at least two UEs.
  • SRS sounding reference signal
  • a sounding reference signal (SRS) transmission method is provided, which is performed by a user equipment (UE), comprising: receiving SRS configuration information sent by a base station; acquiring the UE from the SRS configuration information SRS configuration, where the SRS of the UE is non-orthogonal with the SRS of other UEs; and the SRS of the UE is sent according to the SRS configuration information.
  • SRS sounding reference signal
  • a sounding reference signal (SRS) transmission method is provided, which is performed by a user equipment (UE), comprising: receiving SRS configuration information sent by a base station, where the SRS configuration information includes an SRS of the UE Information of the included basic block; transmitting the SRS of the UE according to the SRS configuration information.
  • SRS sounding reference signal
  • a base station including: a generating unit, configured to generate SRS configuration information of at least two UEs, such that an SRS of the first type of UEs in the at least two UEs and the at least two The SRS of the second type of UEs in the UEs is non-orthogonal; and the sending unit is configured to send SRS configuration information of the at least two UEs.
  • a user equipment comprising: a receiving unit configured to receive SRS configuration information sent by a base station; and an acquiring unit configured to acquire the UE from the SRS configuration information An SRS configuration, where the SRS of the UE is non-orthogonal with the SRS of other UEs, and the sending unit is configured to send the SRS of the UE according to the SRS configuration information.
  • a user equipment including: a receiving unit, configured to receive SRS configuration information sent by a base station, where the SRS configuration information includes a basic block included in an SRS of the UE And a sending unit, configured to send the SRS of the UE according to the SRS configuration information.
  • the SRS reference signal sequences of at least two UEs can be configured to be non-orthogonal, thereby enabling more UEs to transmit SRS given channel resources.
  • Channel measurement is performed to effectively increase the capacity of the SRS.
  • FIG. 1 shows a schematic diagram of a frame structure in a communication system according to an example of the present invention
  • FIG. 2 shows an example of a frequency domain transmission distribution of SRSs of different UEs
  • FIG. 3 illustrates another example of a frequency domain transmission distribution of SRSs of different UEs
  • FIG. 4 shows a flow chart of an SRS transmission method according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing an SRS reference signal sequence configuration of an SRS of a first type of UE and a second type of UE;
  • FIG. 6 shows a schematic diagram of a SRS reference signal sequence configuration with two first type UEs and three second type UEs, respectively;
  • Figure 7 shows an example of a configuration of SRS non-orthogonal for a UE implementing two block structures using different comb-tooth intervals
  • FIG. 8 is a flowchart showing an SRS transmission method according to another embodiment of the present invention.
  • FIG. 9 is a flowchart showing an SRS transmission method according to another embodiment of the present invention.
  • FIG. 10 is a block diagram showing the structure of a base station according to an embodiment of the present invention.
  • FIG. 11 is a block diagram showing the structure of a UE according to an embodiment of the present invention.
  • FIG. 12 is a block diagram showing the structure of a UE according to another embodiment of the present invention.
  • FIG. 13 is a diagram showing an example of a hardware configuration of a base station or a UE according to an embodiment of the present invention.
  • a sounding reference signal (SRS) transmitted by the UE in the uplink may enable the base station to estimate the uplink channel quality of different frequency bands to measure and/or monitor the channel.
  • SRS sounding reference signal
  • 1 shows a schematic diagram of a frame structure in a communication system according to an example of the present invention. Among them, one frame is composed of a plurality of time slots, and each time slot contains 7 or 14 symbols. In the frame structure shown in Figure 1, the sounding reference signal SRS will be transmitted on the last one or more (e.g., 2 or 4) symbols of the 14 symbols of time slot N.
  • SRS between different UEs may be considered to be transmitted on the same resource block (RB) set of the same subframe.
  • the reference signal sequence of SRS between different UEs may be based on Interleaved Frequency-division multiple-access (IFDMA). Different "combs" are used in the frequency domain to distinguish.
  • FIG. 2 shows an example of a frequency domain transmission distribution of SRSs of different UEs on the OFDM symbol in FIG. 1.
  • the shaded hatched portion shows subcarriers for SRS transmission for a certain UE, and the dotted shaded portion shows subcarriers for SRS transmission of another UE.
  • the reference signal sequence of the SRSs of the two UEs is mapped every other subcarrier, thereby forming a “comb” spectrum, and at this time, the comb intervals of the SRSs of the two UEs are both Is 2.
  • 3 shows another example of the frequency domain transmission distribution of SRSs of different UEs on the OFDM symbol in FIG. 1. The four shades from top to bottom respectively show four different subcarriers for SRS transmission of four UEs, and also form a "comb" spectrum. At this time, the combs of the four UEs have a comb number of 4. In the above examples of FIG. 2 and FIG.
  • the reference signal sequences of the SRSs between the different UEs are completely non-coincident in the frequency domain, that is, completely orthogonal,
  • the transmitted signals are independent and do not interfere with each other.
  • the transmission distribution of the SRSs of different UEs shown in FIG. 2 and FIG. 3 in the frequency domain can ensure the accuracy of channel estimation, but has a large limitation on the capacity of the SRS.
  • an embodiment of the present invention provides a sounding reference signal transmission method, which is performed by a base station.
  • FIG. 4 shows a flow diagram of an SRS transmission method 400 in accordance with an embodiment of the present invention.
  • step S401 SRS configuration information of at least two UEs is generated, such that an SRS of the first type of UEs of the at least two UEs and an SRS of the second type of UEs of the at least two UEs are not Orthogonal.
  • the at least two UEs may include at least one UE of the first type and at least one UE of the second type.
  • the SRS of the first type of UEs of the at least two UEs and the SRS of the second type of UEs of the at least two UEs may be non-orthogonal may include a part between the SRS of the first type of UE and the SRS of the second type of UE Orthogonal, that is, a subcarrier that transmits the SRS of the first type of UE and the SRS of the second type of UE may partially overlap, thereby improving the SRS capacity.
  • the bandwidth of the SRS of the first type of UE is greater than the bandwidth of the SRS of the second type of UE. That is, the SRS of the first type of UE may be a wideband SRS, and the SRS of the second type of UE may be a narrowband SRS.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • the first type of UE and the foregoing may be implemented by setting a comb-tooth interval of an SRS of a first type of UE to be different from a comb-tooth interval of an SRS of the second type of UE.
  • the reference signal sequences of the SRSs of the second type of UE are non-orthogonal.
  • FIG. 5 shows an example of a comb-tooth interval setting of an SRS of a first type of UE (UE1) and an SRS of a second type of UE (UE2). As shown in FIG.
  • the comb-tooth interval of the SRS of the first type UE may be set to 2
  • the comb-tooth interval of the second type of UE may be set to 3
  • the same sub-carrier on the same time-frequency resource unit may be used at the same time.
  • the SRS of the first type of UE is sent, and is used to send the SRS of the second type of UE.
  • the SRS of the first type of UE and the SRS of the second type of UE are not completely orthogonal.
  • the comb spacing of the SRS of the first type of UE may be mutually compatible with the comb spacing of the SRS of the second type of UE, such that not all subcarriers simultaneously carry the first type UE and the second type
  • the SRS of the UE may separately carry the SRS of the first type of UE and the sub-carrier of the SRS of the second type of UE, so as to achieve interference randomization processing between SRSs of different UEs, which is beneficial to subsequent base stations for each UE.
  • the accuracy of the channel estimation of the SRS is improved.
  • the comb-tooth spacing of the SRS of the first type UE may take a value of 3 or 5
  • the comb-tooth spacing of the SRS of the second type UE may take a value of 2 or 4 and so on.
  • FIG. 6 shows a schematic diagram of an SRS configuration with two first type UEs (UE1, UE3) and three second type UEs (UE2, UE4, UE5).
  • the comb-tooth spacing of UE1 and UE3 is 3, and the comb-tooth spacing of UE2 and UE4 is 2, and the comb-tooth spacing of UE5 is 4. It can be seen from FIG.
  • the two broadband SRSs of UE1 and UE3 are orthogonal to each other, and the three narrowband SRSs of UE2, UE4 and UE5 are also orthogonal to each other.
  • the SRS of the two sets of broadband UEs of UE1, UE3, UE2, UE4, and UE5 and the SRS of the narrowband UE are two-two non-orthogonal, and there are two sub-sequences of the two SRSs in the frequency domain. Carrier.
  • the configuration information of the SRS configured by the base station may include information such as a bandwidth of the SRS and/or an interval information indicating a comb-tooth interval.
  • the bandwidth of the SRS may be represented by a time-frequency resource unit, where the time-frequency resource unit may be a predetermined frequency resource.
  • one time-frequency resource unit may be one or more resource blocks (RBs) in the LTE system or NR. .
  • the SRS may be sent according to the configured sequence of the corresponding SRS reference signals.
  • the base station may send the SRS configuration information by using high layer signaling (such as RRC, MAC CE) or physical layer signaling (lower layer control information).
  • the base station may select a configuration manner of the SRS reference signal sequence according to the SRS bandwidth type of the UE. For example, for narrowband SRS, the base station may select a shorter root sequence to configure the SRS, for example, a ZC (Zadoff-Chu) sequence of length 31 used in LTE may be selected; and for wideband SRS, the base station may select a longer root sequence. For example, a ZC sequence of length 61 is used to configure the SRS.
  • the actually transmitted sequence can be obtained by cyclic shift (CS) based on the ZC sequence of the above length.
  • CS cyclic shift
  • the SRS of the UE configured by the base station may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • the base station may generate SRS configuration information of any one or more UEs of the at least two UEs according to the information of the basic block.
  • the bandwidth information in the SRS configuration information that is configured by the base station may include the information of the basic block included in the SRS, and may be the length of the basic block and the number of basic blocks.
  • the base station may determine a reference signal sequence of the SRS of the corresponding one or more UEs according to the determined length of the basic block and the number of basic blocks. For example, the base station may configure the SRS reference signal sequence of the UE according to the length and the number of the basic block, and notify the UE.
  • the UE may directly send the SRS according to the preset sequence configuration corresponding to the length and the number of the basic block.
  • the length information of the basic block or the configuration of the preset SRS reference signal sequence may be previously notified to the UE by the base station, or may be written in the standard or transmitted by using signaling.
  • an instruction corresponding to the type of the length of the basic block (such as the configuration ID) needs to be used to indicate the length of the basic block.
  • the at least two UEs may also include at least one UE of the first type and at least one UE of the second type, wherein the first type
  • the bandwidth of the SRS of the UE is greater than the bandwidth of the SRS of the second type of UE. That is, the SRS of the first type of UE may be a wideband SRS, and the SRS of the second type of UE may be a narrowband SRS.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • the basic block used to configure the SRS of the first type of UE may be the first basic block
  • the basic block used to configure the SRS of the second type of UE may be the second basic block.
  • the SRS transmission sequence of each basic block may be constructed based on a ZC sequence of a given length, for example, a length of 31. ZC sequence.
  • the SRS transmission sequence on each base block may be obtained by cyclic shifting of the ZC sequence.
  • the length of the basic block may be the same as or different from the length of the time-frequency resource unit.
  • the length of one basic block may include one or more time-frequency resource units.
  • the length of the basic block may be the same as or different from the resource block (RB).
  • one basic block may be one RB, or may be an integer multiple of RB.
  • only the SRS configuration information of the first type of UE may be generated according to the information of the basic block; or the SRS configuration information of the second type of UE may be generated according to the information of the basic block.
  • the SRS configuration information of the first type UE and the second type UE may be separately generated according to the same or different basic block information.
  • the length of the first basic block used to configure the SRS of the first type of UE may be the same or different, and further, the number of the first basic block and the number of the second basic block may be the same or different.
  • the first type can be realized by using the different comb-tooth intervals described above.
  • the first basic block length of the UE6 is configured to be twice the second basic block of the UE7, the comb-tooth interval of the UE6 is 3, and the comb-tooth interval of the UE7 is 2.
  • the length of the second basic block of the configuration of the UE7 may be 1 RB. Accordingly, the first basic block length of the configured UE6 may be 2 RBs.
  • the comb spacing of the SRS of the first type of UE may be mutually compatible with the comb spacing of the SRS of the second type of UE, such that not all subcarriers simultaneously carry the first type UE and the second type
  • the SRS of the UE may separately carry the SRS of the first type of UE and the sub-carrier of the SRS of the second type of UE, so as to achieve interference randomization processing between SRSs of different UEs, which is beneficial to subsequent base stations for each UE.
  • Channel estimation for SRS For example, the comb-tooth spacing of the SRS of the first type UE may take a value of 3 or 5, and the comb-tooth spacing of the SRS of the second type UE may take a value of 2 or 4 and so on.
  • the SRS transmission sequence of each basic block may be based on different given lengths of the ZC sequence.
  • the first base block uses a ZC sequence of length 61
  • the second base block uses a ZC sequence of length 31.
  • the SRS transmission sequence on each base block may be obtained by cyclic shifting of the ZC sequence.
  • the SRSs of the first type of UEs may be mutually Orthogonal.
  • the lengths and/or numbers of the basic blocks configuring the plurality of first type UEs may be the same or different from each other.
  • the SRSs of the UEs of the second type may also be orthogonal to each other.
  • the lengths and/or numbers of the basic blocks configuring the plurality of second type UEs may also be the same or different from each other.
  • the configuration information of the SRS configured by the base station may include information such as the length of the basic block of the SRS, the number of basic blocks, and/or the interval information indicating the comb-tooth interval.
  • the UE may send the SRS according to the configured sequence of the corresponding SRS reference signals.
  • the base station may send the SRS configuration information by using high layer signaling (such as RRC, MAC CE) or physical layer signaling (lower layer control information).
  • the base station may select a configuration manner of the SRS reference signal sequence according to the SRS bandwidth type of the UE.
  • the base station may select a shorter root sequence to configure the SRS, for example, a ZC (Zadoff-Chu) sequence of length 31 used in LTE may be selected; and for wideband SRS, the base station may select a longer root sequence.
  • a ZC sequence of length 61 is used to configure the SRS.
  • the actually transmitted sequence can be obtained by cyclic shift (CS) based on the ZC sequence of the above length.
  • the SRS of the UE configured by the base station may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • step S402 SRS configuration information of the at least two UEs is transmitted.
  • the base station may use the serial interference cancellation (SIC) method to receive the at least two UEs after receiving the SRSs of the at least two UEs.
  • the SRS performs channel estimation to improve estimation accuracy. For example, the base station may first estimate the SRS of the first type of UE, and delete the SRS of the first type of UE after the estimation, and then estimate the SRS of the second type of UE.
  • the SRSs of different UEs may be deleted one by one according to the quality of the received signal.
  • the SRS reference signal sequence of at least two UEs may be configured to be non-orthogonal, so that more UEs can be allowed to transmit SRS for channel measurement given a channel resource, thereby effectively improving The capacity of the SRS.
  • FIG. 8 shows a flow chart of an SRS transmission method 800 in accordance with an embodiment of the present invention.
  • step S801 SRS configuration information transmitted by the base station is received.
  • step S802 an SRS configuration of the UE is obtained from the SRS configuration information, where an SRS of the UE is non-orthogonal with SRSs of other UEs.
  • the base station may configure the SRS of the at least two UEs so that the SRS of the UE is non-orthogonal with the SRSs of other UEs to achieve the SRS capacity in the case of a given channel resource. the goal of. Specifically, the SRS of the UE and the SRS of other UEs may be partially orthogonal, that is, the SRS that sends the UE may partially overlap with the subcarriers of the SRSs of other UEs.
  • the SRS of the UE may be a broadband SRS, and may of course be a narrowband SRS.
  • the UE is a broadband SRS
  • other UEs may be narrowband SRSs
  • other UEs may be broadband SRSs.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • step S803 the SRS of the UE is transmitted according to the SRS configuration information.
  • the UE may send the SRS according to the SRS reference signal sequence corresponding to the SRS configuration information.
  • the configuration of the SRS reference signal sequence by the base station may be previously notified to the UE by the base station, or may be written into the standard or transmitted by using signaling, so that the UE learns the corresponding configured SRS reference signal sequence.
  • the base station may configure the SRS reference signal sequence of at least two UEs to be non-orthogonal, so that more UEs can be allowed to transmit SRS for channel measurement given a channel resource. Effectively increase the capacity of SRS.
  • the embodiment of the invention further provides a sounding reference signal transmission method, which is performed by a UE.
  • FIG. 9 shows a flow diagram of an SRS transmission method 900 in accordance with an embodiment of the present invention.
  • step S901 SRS configuration information sent by a base station is received, where the SRS configuration information includes information of a basic block included in an SRS of the UE.
  • the bandwidth information in the SRS configuration information of the UE configured by the base station may include the information of the basic block included in the SRS, and may include the length of the basic block, when the basic structural unit of the transmission of the SRS in the frequency domain is the basic block. And the number of base blocks.
  • the base station may determine a reference signal sequence of the SRS of the corresponding one or more UEs according to the determined length of the basic block and the number of basic blocks. For example, the base station may configure the SRS reference signal sequence of the UE according to the length and the number of the basic block, and notify the UE.
  • the UE may directly determine the corresponding reference signal sequence configuration according to the preset length and number of the basic block.
  • the length of the basic block or the configuration of the preset SRS reference signal sequence may be previously notified to the UE by the base station, or may be written into the standard or transmitted by using signaling. For example, when the length type of the base block has been preset in the SRS configuration, an instruction corresponding to the type of the length of the base block (such as the configuration ID) needs to be used to indicate the length of the basic block.
  • the length of the basic block may be the same as or different from the length of the time-frequency resource unit, for example, the length of one basic block may include one or more times. Frequency resource unit.
  • the length of the basic block may be the same as or different from the resource block (RB).
  • RB resource block
  • one basic block may be one RB, or may be an integer multiple of RB.
  • the configuration information of the SRS configured by the base station may include not only the length of the basic block of the SRS, the number of basic blocks, but also information such as interval information indicating the comb-tooth interval.
  • the base station may send the SRS configuration information by using high layer signaling (such as RRC, MAC CE) or physical layer signaling (lower layer control information).
  • the SRS of the UE configured by the base station may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • step S902 the SRS of the UE is transmitted according to the SRS configuration information.
  • the SRS may be sent according to the corresponding SRS reference signal sequence.
  • the configuration of the SRS reference signal sequence by the base station may be previously notified to the UE by the base station, or may be written into the standard or transmitted by using signaling, so that the UE learns the corresponding configured SRS reference signal sequence.
  • the base station may configure the SRS reference signal sequence of at least two UEs to be non-orthogonal, so that more UEs can be allowed to transmit SRS for channel measurement given a channel resource. Effectively increase the capacity of SRS.
  • the base station can perform the above SRS transmission method. Since the operation of the base station is substantially the same as the steps of the SRS transmission method described above, only a brief description thereof will be made herein, and a repeated description of the same content will be omitted.
  • the base station 1000 includes a generating unit 1010 and a transmitting unit 1020. It will be appreciated that FIG. 10 only shows components related to embodiments of the present invention, while other components are omitted, but this is merely illustrative, and base station 1000 may include other components as needed.
  • the generating unit 1010 generates SRS configuration information of the at least two UEs, such that an SRS of the first type of UEs of the at least two UEs is non-orthogonal with an SRS of the second type of UEs of the at least two UEs.
  • the at least two UEs may include at least one UE of the first type and at least one UE of the second type.
  • the generating unit 1010 may implement the SRS of at least two UEs, such that the SRS of the first type of UE and the SRS of the second type of UE are non-orthogonal to achieve the SRS capacity in the case of a given channel resource.
  • the SRS of the first type of UE and the SRS of the second type of UE may be partially orthogonal, that is, between the SRS that sends the first type of UE and the SRS of the second type of UE may be Partially coincident.
  • the bandwidth of the SRS of the first type of UE is greater than the bandwidth of the SRS of the second type of UE. That is, the SRS of the first type of UE may be a wideband SRS, and the SRS of the second type of UE may be a narrowband SRS.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • the generating unit 1010 may implement the first type of UE by setting a comb-tooth interval of the SRS of the first type UE to be different from a comb-tooth interval of the SRS of the second type of UE.
  • a reference signal sequence of the SRS of the second type of UE is non-orthogonal.
  • FIG. 5 shows an example of a comb-tooth interval setting of an SRS of a first type of UE (UE1) and an SRS of a second type of UE (UE2). As shown in FIG.
  • the comb-tooth interval of the SRS of the first type UE may be set to 2
  • the comb-tooth interval of the second type of UE may be set to 3
  • the same sub-carrier on the same time-frequency resource unit may be used at the same time.
  • the SRS of the first type of UE is sent, and is used to send the SRS of the second type of UE.
  • the SRS of the first type of UE and the SRS of the second type of UE are not completely orthogonal.
  • the comb spacing of the SRS of the first type of UE may be mutually compatible with the comb spacing of the SRS of the second type of UE, such that not all subcarriers simultaneously carry the first type UE and the second type
  • the SRS of the UE may separately carry the SRS of the first type of UE and the sub-carrier of the SRS of the second type of UE, so as to achieve interference randomization processing between SRSs of different UEs, which is beneficial to subsequent base stations for each UE.
  • the accuracy of the channel estimation of the SRS is improved.
  • the comb-tooth spacing of the SRS of the first type UE may take a value of 3 or 5
  • the comb-tooth spacing of the SRS of the second type UE may take a value of 2 or 4 and so on.
  • FIG. 6 shows a schematic diagram of an SRS configuration with two first type UEs (UE1, UE3) and three second type UEs (UE2, UE4, UE5).
  • the comb-tooth spacing of UE1 and UE3 is 3, and the comb-tooth spacing of UE2 and UE4 is 2, and the comb-tooth spacing of UE5 is 4. It can be seen from FIG.
  • the two broadband SRSs of UE1 and UE3 are orthogonal to each other, and the three narrowband SRSs of UE2, UE4 and UE5 are also orthogonal to each other.
  • the SRS of the two sets of broadband UEs of UE1, UE3, UE2, UE4, and UE5 and the SRS of the narrowband UE are two-two non-orthogonal, and there are two sub-sequences of the two SRSs in the frequency domain. Carrier.
  • the configuration information of the SRS configured by the generating unit 1010 may include information such as a bandwidth of the SRS and/or an interval information indicating a comb-tooth interval.
  • the bandwidth of the SRS may be represented by a time-frequency resource unit, where the time-frequency resource unit may be a predetermined frequency resource.
  • one time-frequency resource unit may be one or more resource blocks (RBs) in the LTE system or NR.
  • the generating unit 1010 may select a configuration manner of the SRS reference signal sequence according to the SRS bandwidth type of the UE. For example, for the narrowband SRS, the generating unit 1010 may select a shorter root sequence to configure the SRS, for example, a ZC (Zadoff-Chu) sequence of length 31 used in LTE may be selected; and for the wideband SRS, the generating unit 1010 may select A long root sequence, such as a ZC sequence of length 61, configures the SRS.
  • the actually transmitted sequence can be obtained by cyclic shift (CS) based on the ZC sequence of the above length.
  • CS cyclic shift
  • the SRS of the UE configured by the generating unit 1010 may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • the generating unit 1010 may generate SRS configuration information of any one or more UEs of the at least two UEs according to the information of the basic block.
  • the bandwidth information in the SRS configuration information configured by the generating unit 1010 may include information of a basic block included in the SRS, specifically, a length of the basic block and a basic block number. Subsequently, the generating unit 1010 may determine a reference signal sequence of the SRS of the corresponding one or more UEs according to the determined length of the basic block and the number of basic blocks.
  • the generating unit 1010 may configure the SRS reference signal sequence of the UE according to the length and the number of the basic block, and notify the UE; or, the UE may directly send according to the preset sequence configuration corresponding to the length and the number of the basic block.
  • the SRS where the length information of the basic block or the configuration of the preset SRS reference signal sequence may be previously notified to the UE by the base station, may also be written in the standard or transmitted by using signaling.
  • the generating unit 1010 needs to indicate the length of the basic block by using an instruction corresponding to the type of the length of the basic block (such as the configuration ID).
  • the at least two UEs may also include at least one UE of the first type and at least one UE of the second type, wherein the first type
  • the bandwidth of the SRS of the UE is greater than the bandwidth of the SRS of the second type of UE. That is, the SRS of the first type of UE may be a wideband SRS, and the SRS of the second type of UE may be a narrowband SRS.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • the basic block used to configure the SRS of the first type of UE may be the first basic block
  • the basic block used to configure the SRS of the second type of UE may be the second basic block.
  • the length of the basic block may be the same as or different from the length of the time-frequency resource unit.
  • the length of one basic block may include one or more time-frequency resource units.
  • the length of the basic block may be the same as or different from the resource block (RB).
  • one basic block may be one RB, or may be an integer multiple of RB.
  • the generating unit 1010 may generate only the SRS configuration information of the first type of UE according to the information of the basic block; or generate only the SRS configuration information of the second type of UE according to the information of the basic block.
  • the generating unit 1010 may also generate SRS configuration information of the first type UE and the second type UE respectively according to the same or different basic block information.
  • the generating unit 1010 when the SRS of the first type of UE and the SRS of the second type of UE are both configured according to a basic block, the generating unit 1010 is configured to configure a first basis of the SRS of the first type of UE.
  • the length of the block may be the same as or different from the length of the second basic block used to configure the SRS of the second type of UE. Further, the number of the first basic block and the number of the second basic block may be the same or different.
  • the generating unit 1010 can be implemented by using the different comb-tooth intervals described above.
  • the first basic block length of the UE6 is configured to be twice the second basic block of the UE7, the comb-tooth interval of the UE6 is 3, and the comb-tooth interval of the UE7 is 2.
  • the length of the second basic block of the configuration of the UE7 may be 1 RB. Accordingly, the first basic block length of the configured UE6 may be 2 RBs.
  • the comb spacing of the SRS of the first type of UE may be mutually compatible with the comb spacing of the SRS of the second type of UE, such that not all subcarriers simultaneously carry the first type UE and the second type
  • the SRS of the UE may separately carry the SRS of the first type of UE and the sub-carrier of the SRS of the second type of UE, so as to achieve interference randomization processing between SRSs of different UEs, which is beneficial to subsequent base stations for each UE.
  • Channel estimation for SRS For example, the comb-tooth spacing of the SRS of the first type UE may take a value of 3 or 5, and the comb-tooth spacing of the SRS of the second type UE may take a value of 2 or 4 and so on.
  • the SRS transmission sequence of each basic block may be based on different given lengths of the ZC sequence.
  • the first base block uses a ZC sequence of length 61
  • the second base block uses a ZC sequence of length 31.
  • the SRS transmission sequence on each base block may be obtained by cyclic shifting of the ZC sequence.
  • the SRSs of the first type of UEs may be mutually Orthogonal.
  • the lengths and/or numbers of the basic blocks configuring the plurality of first type UEs may be the same or different from each other.
  • the SRSs of the UEs of the second type may also be orthogonal to each other.
  • the lengths and/or numbers of the basic blocks configuring the plurality of second type UEs may also be the same or different from each other.
  • the configuration information of the SRS configured by the generating unit 1010 may include information such as the length of the basic block of the SRS, the number of basic blocks, and/or the interval information indicating the comb-tooth interval.
  • the UE may send the SRS according to the configured sequence of the corresponding SRS reference signals.
  • the base station may send the SRS configuration information by using high layer signaling (such as RRC, MAC CE) or physical layer signaling (lower layer control information).
  • the base station may select a configuration manner of the SRS reference signal sequence according to the SRS bandwidth type of the UE.
  • the base station may select a shorter root sequence to configure the SRS, for example, a ZC (Zadoff-Chu) sequence of length 31 used in LTE may be selected; and for wideband SRS, the base station may select a longer root sequence.
  • a ZC sequence of length 61 is used to configure the SRS.
  • the actually transmitted sequence can be obtained by cyclic shift (CS) based on the ZC sequence of the above length.
  • the SRS of the UE configured by the generating unit 1010 may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • the sending unit 1020 sends SRS configuration information of the at least two UEs.
  • the sending unit 1020 sends the SRS configuration information to the at least two UEs
  • the corresponding UE may send the SRS according to the SRS configuration information, so that the base station performs channel estimation.
  • the estimation unit (not shown) may use the serial interference cancellation after receiving the SRSs of the at least two UEs by the receiving unit (not shown).
  • the (SIC) method performs channel estimation on the received SRSs of the at least two UEs to improve estimation accuracy.
  • the estimating unit may first estimate the SRS of the first type of UE, and delete the SRS of the first type of UE after the estimation, and then estimate the SRS of the second type of UE.
  • the SRSs of different UEs may be deleted one by one according to the quality of the received signal.
  • the base station may configure the SRS reference signal sequence of at least two UEs to be non-orthogonal, thereby enabling more UEs to transmit SRS for channel measurement in case of given channel resources, thereby effectively improving SRS. Capacity.
  • the UE can perform the above SRS transmission method. Since the operation of the UE is substantially the same as the steps of the SRS transmission method described in FIG. 8, only a brief description thereof will be made herein, and a repeated description of the same content will be omitted.
  • the UE 1100 may include a receiving unit 1110, an obtaining unit 1120, and a transmitting unit 1130. It will be appreciated that FIG. 11 only shows components related to embodiments of the present invention, while other components are omitted, but this is merely illustrative, and UE 1100 may include other components as needed.
  • the receiving unit 1110 receives the SRS configuration information sent by the base station.
  • the obtaining unit 1120 acquires an SRS configuration of the UE from the SRS configuration information, where an SRS of the UE is non-orthogonal with SRSs of other UEs.
  • the base station may configure the SRS of the at least two UEs so that the SRS of the UE is non-orthogonal with the SRSs of other UEs to achieve the SRS capacity in the case of a given channel resource. the goal of. Specifically, the SRS of the UE and the SRS of other UEs may be partially orthogonal, that is, the SRS that sends the UE may partially overlap with the subcarriers of the SRSs of other UEs.
  • the SRS of the UE may be a broadband SRS, and may of course be a narrowband SRS.
  • the UE is a broadband SRS
  • other UEs may be narrowband SRSs
  • other UEs may be broadband SRSs.
  • the broadband and narrowband in the embodiment of the present invention are relative concepts.
  • a preset threshold may be used to distinguish between a wideband SRS and a narrowband SRS, that is, an SRS whose bandwidth is greater than a preset threshold is used as a broadband SRS, and a bandwidth is less than or equal to a preset threshold.
  • SRS acts as a narrowband SRS.
  • the bandwidth of the wideband SRS may be a multiple of the narrowband SRS, for example, the bandwidth of the wideband SRS may be twice or four times the bandwidth of the narrowband SRS.
  • the sending unit 1130 sends the SRS of the UE according to the SRS configuration information.
  • the transmitting unit 1130 may transmit the SRS according to the SRS reference signal sequence corresponding to the SRS configuration information.
  • the configuration of the SRS reference signal sequence by the base station may be previously notified to the UE by the base station, or may be written into the standard or transmitted by using signaling, so that the UE learns the corresponding configured SRS reference signal sequence.
  • the UE according to the embodiment of the present invention may enable the base station to configure the SRS reference signal sequence of at least two UEs to be non-orthogonal, so that more UEs can be allowed to transmit SRS for channel measurement given a channel resource, thereby effectively improving The capacity of the SRS.
  • the UE can perform the above SRS transmission method. Since the operation of the UE is substantially the same as the steps of the SRS transmission method described in FIG. 9, only a brief description thereof will be made herein, and a repeated description of the same content will be omitted.
  • the UE 1200 may include a receiving unit 1210 transmitting unit 1220. It will be appreciated that FIG. 12 shows only components related to embodiments of the present invention, while other components are omitted, but this is merely illustrative, and the UE 1200 may include other components as needed.
  • the receiving unit 1010 receives SRS configuration information sent by the base station, where the SRS configuration information includes information of a basic block included in the SRS of the UE.
  • the bandwidth information in the SRS configuration information of the UE configured by the base station may include the information of the basic block included in the SRS, and may include the length of the basic block, when the basic structural unit of the transmission of the SRS in the frequency domain is the basic block. And the number of base blocks.
  • the base station may determine a reference signal sequence of the SRS of the corresponding one or more UEs according to the determined length of the basic block and the number of basic blocks.
  • the base station may configure the SRS reference signal sequence of the UE according to the length and the number of the basic block, and notify the UE.
  • the receiving unit 1010 may directly determine the corresponding reference signal sequence according to the preset length and number of the basic block.
  • the configuration may be that the length of the basic block or the configuration of the preset SRS reference signal sequence may be previously notified to the UE by the base station, or may be written in the standard or transmitted by using signaling. For example, when the length type of the base block has been preset in the SRS configuration, an instruction corresponding to the type of the length of the base block (such as the configuration ID) needs to be used to indicate the length of the basic block.
  • the length of the basic block may be the same as or different from the length of the time-frequency resource unit, for example, the length of one basic block may include one or more times. Frequency resource unit.
  • the length of the basic block may be the same as or different from the resource block (RB).
  • RB resource block
  • one basic block may be one RB, or may be an integer multiple of RB.
  • the configuration information of the SRS configured by the base station may include not only the length of the basic block of the SRS, the number of basic blocks, but also information such as interval information indicating the comb-tooth interval.
  • the base station may send the SRS configuration information by using high layer signaling (such as RRC, MAC CE) or physical layer signaling (lower layer control information).
  • the SRS of the UE configured by the base station may be a periodic SRS or an aperiodic SRS.
  • the SRS configuration information may further include information such as a sending period of the SRS.
  • the base station will trigger the SRS transmission through the physical downlink control channel PDCCH. After the base station triggers, the corresponding UE sends the SRS only once.
  • the sending unit 1220 sends the SRS of the UE according to the SRS configuration information.
  • the sending unit 1220 may send the SRS according to the corresponding SRS reference signal sequence.
  • the configuration of the SRS reference signal sequence by the base station may be previously notified to the UE by the base station, or may be written into the standard or transmitted by using signaling, so that the UE learns the corresponding configured SRS reference signal sequence.
  • the UE according to the embodiment of the present invention may enable the base station to configure the SRS reference signal sequence of at least two UEs to be non-orthogonal, so that more UEs can be allowed to transmit SRS for channel measurement given a channel resource, thereby effectively improving The capacity of the SRS.
  • each functional block may be implemented by one device that is physically and/or logically combined, or two or more devices that are physically and/or logically separated, directly and/or indirectly (eg, This is achieved by a plurality of devices as described above by a wired and/or wireless connection.
  • the base station 1000, the UE 1100, the UE 1200, and the like in an embodiment of the present invention can function as a computer that performs processing of the wireless communication method of the present invention.
  • FIG. 13 is a diagram showing an example of a hardware configuration of a base station or a UE according to an embodiment of the present invention.
  • the base station 1000, the UE 1100, or the UE 1200 described above may be configured as a computer device that physically includes a processor 1301, a memory 1302, a memory 1303, a communication device 1304, an input device 1305, an output device 1306, a bus 1307, and the like.
  • the hardware structure of the base station 1000, the UE 1100, or the UE 1200 may include one or more of the devices shown in the figure, or may not include some devices.
  • the processor 1301 only illustrates one, but may also 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 1301 can be installed by more than one chip.
  • Each function in the base station 1000, the UE 1100, or the UE 1200 is realized, for example, by reading a predetermined software (program) into hardware such as the processor 1301 and the memory 1302, thereby causing the processor 1301 to perform an operation on the communication device.
  • the communication performed by 1304 is controlled, and the reading and/or writing of data in the memory 1302 and the memory 1303 is controlled.
  • the processor 1301 for example, causes the operating system to operate to control the entire computer.
  • the processor 1301 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 1301 reads out programs (program codes), software modules, data, and the like from the memory 1303 and/or the communication device 1304 to the memory 1302, and executes various processes in accordance therewith.
  • programs program codes
  • software modules software modules
  • data data, and the like
  • 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 memory 1302 is a computer readable recording medium, and may be, for example, a read only memory (ROM, Read Only Memory), a programmable read only memory (EPROM), an electrically programmable read only memory (EEPROM), or a random access memory ( At least one of RAM, Random Access Memory, and other suitable storage media.
  • the memory 1302 may also be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1302 can store an executable program (program code), a software module, and the like for implementing the wireless communication method according to the embodiment of the present invention.
  • the memory 1303 is a computer readable recording medium, and may be, for example, a flexible disk, a soft (registered trademark) disk (floppy disk), a magneto-optical disk (for example, a CD-ROM (Compact DiscROM), etc.), and a digital universal CD, Blu-ray (registered trademark) disc, removable disk, hard drive, smart card, flash device (eg card, stick, key driver), magnetic stripe, database, server And at least one of other suitable storage media.
  • the memory 1003 may also be referred to as an auxiliary storage device.
  • the communication device 1304 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 1304 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 1305 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 1306 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 1305 and the output device 1306 may also be an integrated structure (for example, a touch panel).
  • each device such as the processor 1301 and the memory 1302 is connected via a bus 1307 for communicating information.
  • the bus 1307 may be composed of a single bus or a different bus between devices.
  • the base station 1000, the UE 1100, or the UE 1200 may include a microprocessor, a digital signal processor (DSP, Digital Signal Processor), an application specific integrated circuit (ASIC), a programmable logic device (PLD, Programmable Logic Device), and a field programmable gate array ( Hardware such as FPGA, FieldProgrammableGateArray), etc., can realize some or all of each functional block through the hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • Hardware such as FPGA, FieldProgrammableGateArray
  • the processor 1301 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 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 CC, Component Carrier
  • CC Component Carrier
  • the time slot may be composed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA, Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain.
  • 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, TransmissionTimeInterval), and multiple consecutive subframes may also be referred to as a TTI, and one slot or one minislot may also be referred to as a TTI.
  • 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 equipments to allocate radio resources (bandwidth, transmission power, etc. usable in each user equipment) in units of TTIs.
  • the definition of TTI is not limited to this.
  • the TTI may be a channel-coded data packet (data 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 data 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.
  • 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 (eg, Downlink Control Information (DCI), uplink control information (UCI, Uplink Control Information), upper layer signaling (eg, radio resource control (RRC, RadioResourceControl). Signaling, broadcast information (MIB (Master Information Block), System Information Block (SIB, System Information Block), etc.), Media Access Control (MAC, Medium Access Control) signaling, other signals, or a combination thereof.
  • DCI Downlink Control Information
  • UCI uplink control information
  • RRC RadioResourceControl
  • Signaling broadcast information (MIB (Master Information Block), System Information Block (SIB, System Information Block), etc.
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium 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 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 (coax, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to send software from a website, server, or other remote source
  • wired technology coax, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • base station (BS, BaseStation)
  • radio base station eNB
  • gNB gNodeB
  • cell a cell group
  • carrier a component carrier
  • the terms are used interchangeably.
  • 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), RemoteRadioHead))) 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.
  • the user equipment is also sometimes used by those skilled in the art as a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, and a wireless device. 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 equipment.
  • each mode/embodiment of the present invention can be applied to a configuration in which communication between a wireless base station and a user equipment is replaced with communication between a plurality of user equipment (D2D).
  • D2D user equipment
  • the function of the above-described wireless base station 10 can be regarded as a function of the user equipment 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 equipment in this specification can also be replaced with a wireless base station.
  • a specific operation performed by a base station is also performed by an upper node (upper node) depending on the situation.
  • various actions performed for communication with the terminal may pass through the base station and one or more network nodes other than the base station.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • 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 3G advanced international mobile communication
  • IMT-Advanced 4th generation mobile communication system
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FX
  • Future generation radio access GSM (registered trademark), Global System for Mobile communications), Code Division Multiple Access 2000 (CDMA2000), Super Mobile Broadband (UMB, Ultra) Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra Wideband (UWB, Ultra-W
  • 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, and lookingup (eg, tables, databases, or other data) may be performed. Search in the 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

本发明的实施例提供了一种探测参考信号(SRS)传输方法、基站和用户设备，所述SRS传输方法包括：生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交；发送所述至少两个UE的SRS配置信息。

Description

一种探测参考信号传输方法、基站和用户设备 技术领域
本申请涉及通信技术领域，并且具体涉及一种探测参考信号传输方法、基站和用户设备。
背景技术
在无线网络的数据传输过程中，探测参考信号(Sounding Reference Signal)是一种UE向基站发送以测量信道状态，进行信道估计的信号。具体地，UE按照基站的指示发送上行SRS，而基站根据接收到的SRS判断UE上行的信道状态信息，并根据得到的信道状态信息进行相应的频域选择调度、功率控制等操作。
另一方面，随着无线通信技术的不断发展，提出了不同类型的UE。例如，在5G通信系统中，提出了使用较宽带宽进行数据传输的UE。与传统的UE相比，使用较宽带宽进行数据传输的UE具有数据传输速度更快等优点。在传统的SRS配置方法中，基站需要配置在一个时频资源单位中需要发送的SRS的多个UE的发送资源，以使得该多个UE的SRS正交。然而，这限制了用于传输SRS信号的SRS端口的数量，不能满足5G通信系统的需求。
发明内容
根据本发明的实施例，希望能够在有限的信道资源的情况下支持更多的SRS端口，以进一步提高SRS的容量。
根据本发明的一个方面，提供了一种探测参考信号(SRS)传输方法，由基站执行，包括：生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交；发送所述至少两个UE的SRS配置信息。
根据本发明的另一方面，提供了一种探测参考信号(SRS)传输方法，由用户设备(UE)执行，包括：接收基站发送的SRS配置信息；从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交；根据所述SRS配置信息发送所述UE的SRS。
根据本发明的另一方面，提供了一种探测参考信号(SRS)传输方法， 由用户设备(UE)执行，包括：接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息；根据所述SRS配置信息发送所述UE的SRS。
根据本发明的又一方面，提供了一种基站，包括：生成单元，配置为生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交；发送单元，配置为发送所述至少两个UE的SRS配置信息。
根据本发明的再一方面，提供了一种用户设备(UE)，包括：接收单元，配置为接收基站发送的SRS配置信息；获取单元，配置为从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交；发送单元，配置为根据所述SRS配置信息发送所述UE的SRS。
根据本发明的再一方面，提供了一种用户设备(UE)，包括：接收单元，配置为接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息；发送单元，配置为根据所述SRS配置信息发送所述UE的SRS。
利用根据本发明上述方面的SRS传输方法、基站和用户设备，可以将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
附图说明
通过结合附图对本发明的实施例进行详细描述，本发明的上述和其它目的、特征、优点将会变得更加清楚。
图1示出根据本发明一个示例的通信系统中的帧结构示意图；
图2示出不同UE的SRS的频域传输分布的一个示例；
图3示出不同UE的SRS的频域传输分布的另一个示例；
图4示出根据本发明一个实施例的SRS传输方法的流程图；
图5示出第一类型UE的SRS和第二类型UE的SRS参考信号序列配置的示意图；
图6示出分别具有两个第一类型UE和三个第二类型UE的SRS参考信号序列配置示意图；
图7示出了利用不同的梳齿间隔来实现两个块结构的UE的SRS非正交 的配置示例；
图8示出根据本发明另一个实施例的SRS传输方法的流程图；
图9示出根据本发明另一个实施例的SRS传输方法的流程图；
图10示出根据本发明一个实施例的基站的结构框图；
图11示出根据本发明一个实施例的UE的结构框图；
图12示出根据本发明另一个实施例的UE的结构框图；
图13示出本发明一个实施例所涉及的基站或UE的硬件结构的示例图。
具体实施方式
下面将参照附图来描述根据本发明实施例的SRS传输方法、基站和用户设备。在附图中，相同的参考标号自始至终表示相同的元件。应当理解：这里描述的实施例仅仅是说明性的，而不应被解释为限制本发明的范围。
在根据本发明实施例的无线系统中，在上行链路中由UE发送的探测参考信号(SRS)可以使得基站能够估计不同频段的上行信道质量，以测量和/或监控信道。图1示出根据本发明一个示例的通信系统中的帧结构示意图。其中，一个帧由多个时隙组成，每个时隙包含7个或者14个符号。在图1所示的帧结构中，探测参考信号SRS将在时隙N的14个符号中最后一个或者多个(例如2个或4个)符号上发送。
在现有的通信系统中，不同UE之间的SRS均可以考虑在同一子帧的相同资源块(RB)集合上发送。在这一前提下，为了提高信道估计精确度，保证信道测量的准确性，可以基于交织频分多址技术(Interleaved frequency-division multiple-access，IFDMA)将不同UE之间的SRS的参考信号序列在频域上使用不同的“梳齿(comb)”来区分。图2示出图1中的OFDM符号上不同UE的SRS的频域传输分布的一个示例。其中斜线阴影部分示出用于某一UE的SRS传输的子载波，而点状阴影部分示出用于另一UE的SRS传输的子载波。也就是说，这两个UE的SRS的参考信号序列是每隔一个子载波映射的，从而形成了一个“梳状”频谱，此时这两个UE的SRS的梳齿间隔(comb number)均为2。而图3示出图1中的OFDM符号上不同UE的SRS的频域传输分布的另一个示例。其中从上向下四种阴影分别示出用于四个UE的SRS传输的4种不同子载波，也形成了一个“梳状”频谱。此时这四个UE的SRS的梳齿间隔(comb number)均为4。在上述图2和 图3的示例中，无论梳齿间隔分别为2还是4，各个不同UE之间的SRS的参考信号序列在频域上均完全不重合，也即是完全正交的，其传输的信号各自独立，互不干扰。
图2和图3所示的不同UE的SRS在频域上的传输分布虽然能够保证信道估计的准确度，但却在SRS的容量上具有较大的限制。在5G新空口技术中，希望能够在UE端支持更多的天线端口，这就需要更多的SRS资源，以允许更多UE发送SRS进行信道测量。因此，本申请的发明人考虑利用不同UE间非正交的SRS参考信号序列来提高SRS的容量。
具体地，本发明实施例提供一种探测参考信号传输方法，所述方法由基站执行。图4示出根据本发明实施例的SRS传输方法400的流程图。
如图4所述，在步骤S401中，生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交。
在本发明一个实施例中，所述至少两个UE可以包括至少一个第一类型UE以及至少一个第二类型UE。此外，所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交可以包括第一类型UE的SRS和第二类型UE的SRS之间部分正交，也即发送所述第一类型UE的SRS与第二类型UE的SRS的子载波之间可以部分重合，从而可提高SRS容量的目的。
在本发明一个实施例中，所述第一类型UE的SRS的带宽大于所述第二类型UE的SRS的带宽。也即所述第一类型UE的SRS可以为宽带SRS，而第二类型UE的SRS可以为窄带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。
在本发明另一个实施例中，可以通过将第一类型UE的SRS的梳齿间隔设置为与所述第二类型UE的SRS的梳齿间隔不同，来实现所述第一类型UE和所述第二类型UE的SRS的参考信号序列之间非正交。图5示出了第一类型UE(UE1)的SRS和第二类型UE(UE2)的SRS的梳齿间隔设置的示例。如图5所示，第一类型UE的SRS的梳齿间隔可以设置为2，而第 二类型UE的梳齿间隔可以设置为3，此时相同时频资源单位上的同一子载波可以既用来发送第一类型UE的SRS，又用来发送第二类型UE的SRS。在这种情况下，第一类型UE的SRS和第二类型UE的SRS之间是非完全正交的。可选地，第一类型UE的SRS的梳齿间隔可以与所述第二类型UE的SRS的梳齿间隔互质，这样能够使得不是所有的子载波均同时承载第一类型UE和第二类型UE的SRS，而可以分别有单独承载第一类型UE的SRS和第二类型UE的SRS的子载波，从而能够达到不同UE的SRS之间的干扰随机化处理，有利于后续基站对于各UE的SRS的信道估计的精确度的提升。例如，第一类型UE的SRS的梳齿间隔可以取3或5等值，而第二类型UE的SRS的梳齿间隔则可以取2或4等与其互质的值。
在本发明另一个实施例中，当第一类型UE为多个时，各个第一类型UE的SRS之间可以是相互正交的。此外，当所述第二类型UE为多个时，各个第二类型UE的SRS之间也可以是相互正交的。图6示出分别具有两个第一类型UE(UE1、UE3)和三个第二类型UE(UE2、UE4、UE5)的SRS配置示意图。其中UE1、UE3的梳齿间隔均为3，而UE2、UE4的梳齿间隔均为2，UE5的梳齿间隔为4。由图6可知，UE1和UE3两个宽带SRS之间相互正交，而UE2、UE4和UE5三个窄带SRS之间也分别相互正交。但是，UE1、UE3与UE2、UE4、UE5这两组宽带UE的SRS和窄带UE的SRS之间则是两两非正交的，在频域上存在同时承载两组中任两个SRS的子载波。
以上利用图5和图6例示了不同带宽的UE的SRS之间通过梳齿间隔不同的配置来实现不同UE的SRS之间非正交的实施例。在上述示例中，基站所配置的SRS的配置信息可以包括SRS的带宽和/或指示梳齿间隔的间隔信息等信息。在本发明一个实施例中，SRS的带宽可以以时频资源单位来表示，其中时频资源单位可以为预设含义的给定时频资源。可选地，一个时频资源单位可以为LTE系统或NR中的一个或多个资源块(RB)。。当UE接收到基站发送的SRS配置信息之后，则可以根据配置好的相应的SRS参考信号序列来发送SRS。其中，基站可以通过高层信令(如RRC、MAC CE)或物理层信令(下层控制信息)来发送SRS配置信息。在本发明另一个实施例中，基站可以根据UE的SRS带宽类型来选择SRS参考信号序列的配置方式。例如，对于窄带SRS，基站可以选择较短的根序列来配置SRS，例如可以选择LTE中使用的长度为31的ZC(Zadoff-Chu)序列；而对于宽带SRS，基站 可以选择较长的根序列例如长度为61的ZC序列来配置SRS。实际传输的序列可以基于上述长度的ZC序列进行循环移位(CS,cyclic shift)得到。
在本发明另一个实施例中，基站所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
在本发明另一个实施例中，当UE的SRS发送的频域上的基本单位为基础块时，基站可以根据基础块的信息，生成至少两个UE中任意一个或多个UE的SRS配置信息。其中，基站所配置的SRS配置信息中的带宽信息可以包括SRS所包含的基础块的信息，具体可以为基础块的长度和基础块数目。随后，基站可以根据所确定的基础块的长度以及基础块数目确定相应的一个或多个UE的SRS的参考信号序列。例如，基站可以根据基础块的长度和数目自行配置UE的SRS参考信号序列，并告知UE；或者，UE也可以直接根据预设的与基础块的长度和数目相对应的序列配置来发送SRS，其中，基础块的长度信息或预设的SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输。其中，当在SRS配置中已将基础块的长度类型预设完毕时，需要使用与基础块的长度的类型(如配置ID)一一对应的指令来指示基础块的长度。
当SRS的传输在频域上的基本构造单位为基础块时，与前述类似，所述至少两个UE也可以包括至少一个第一类型UE以及至少一个第二类型UE，其中所述第一类型UE的SRS的带宽大于所述第二类型UE的SRS的带宽。也即所述第一类型UE的SRS可以为宽带SRS，而第二类型UE的SRS可以为窄带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。其中，用于配置第一类型UE的SRS的基础块可以为第一基础块，而用来配置第二类型UE的SRS的基础块可以为第二基础块。
在本发明另一个实施例中,当SRS的传输在频域上的基本构造单位为 基础块时,每个基础块的SRS发射序列可以基于给定长度的ZC序列来构造，例如长度为31的ZC序列。每个基础块上的SRS发射序列可以是所述ZC序列通过循环移位得到。
在本发明另一个实施例中，基础块的长度可以与时频资源单位的长度相同或不同，例如，一个基础块的长度可以包括一个或多个时频资源单位。当然，基础块的长度也可以与资源块(RB)相同或不同，例如一个基础块可以为一个RB，也可以为RB的整数倍等。在本发明一个实施例中，可以根据基础块的信息，仅生成第一类型UE的SRS配置信息；或根据基础块的信息，仅生成第二类型UE的SRS配置信息。当然，在本发明另一个实施例中，也可以根据相同或不同的基础块信息，分别生成第一类型UE和第二类型UE的SRS配置信息。在本发明另一个实施例中，当所述第一类型UE的SRS和所述第二类型UE的SRS均根据基础块配置时，用于配置第一类型UE的SRS的第一基础块的长度与用于配置第二类型UE的SRS的第二基础块的长度可以相同或不同，此外，所述第一基础块的数目与所述第二基础块的数目也可以相同或不同。另外，在本发明另一个实施例中，不论所述第一基础块与所述第二基础块的长度和/或数目相同还是不同，均可以利用前述的不同的梳齿间隔来实现第一类型UE和第二类型UE的SRS的非正交。
图7示出了当配置第一类型UE(UE6)的SRS的第一基础块长度与配置第二类型UE(UE7)的SRS的第二基础块不同，但数目相同时，利用不同的梳齿间隔来实现二者SRS非正交的配置示例。其中，配置UE6的第一基础块长度为配置UE7的第二基础块的两倍，UE6的梳齿间隔为3，UE7的梳齿间隔为2。在图7所示的实施例中，配置UE7的第二基础块的长度可以为1个RB，相应地，配置UE6的第一基础块长度则可以为2个RB。可选地，第一类型UE的SRS的梳齿间隔可以与所述第二类型UE的SRS的梳齿间隔互质，这样能够使得不是所有的子载波均同时承载第一类型UE和第二类型UE的SRS，而可以分别有单独承载第一类型UE的SRS和第二类型UE的SRS的子载波，从而能够达到不同UE的SRS之间的干扰随机化处理，有利于后续基站对于各UE的SRS的信道估计。例如，第一类型UE的SRS的梳齿间隔可以取3或5等值，而第二类型UE的SRS的梳齿间隔则可以取2或4等与其互质的值。
在本发明另一个实施例中,当SRS的传输在频域上的基本构造单位为 第一基础块或第二基础块时,每种基础块的SRS发射序列可以基于不同给定长度的ZC序列来构造，例如第一基础块使用长度为61的ZC序列，第二基础块使用长度为31的ZC序列。每个基础块上的SRS发射序列可以是所述ZC序列通过循环移位得到。在本发明另一个实施例中，在SRS的传输在频域上的基本构造单位为基础块的前提下，当第一类型UE为多个时，各个第一类型UE的SRS之间可以是相互正交的。其中，配置所述多个第一类型UE的基础块的长度和/或数目可以彼此相同或不同。此外，当所述第二类型UE为多个时，各个第二类型UE的SRS之间也可以是相互正交的。同样地，配置所述多个第二类型UE的基础块的长度和/或数目也可以彼此相同或不同。
在上述根据基础块配置SRS的示例中，基站所配置的SRS的配置信息可以包括SRS的基础块的长度、基础块数目和/或指示梳齿间隔的间隔信息等信息。当UE接收到基站发送的SRS配置信息之后，可以根据配置好的相应的SRS参考信号序列来发送SRS。其中，基站可以通过高层信令(如RRC、MAC CE)或物理层信令(下层控制信息)来发送SRS配置信息。在本发明另一个实施例中，基站可以根据UE的SRS带宽类型来选择SRS参考信号序列的配置方式。例如，对于窄带SRS，基站可以选择较短的根序列来配置SRS，例如可以选择LTE中使用的长度为31的ZC(Zadoff-Chu)序列；而对于宽带SRS，基站可以选择较长的根序列例如长度为61的ZC序列来配置SRS。实际传输的序列可以基于上述长度的ZC序列进行循环移位(CS,cyclic shift)得到。
在本发明另一个实施例中，基站所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
回到图4，在步骤S402中，发送所述至少两个UE的SRS配置信息。
在本步骤中，当基站向至少两个UE发送所述SRS配置信息之后，相应的UE可以根据所述SRS配置信息来发送SRS，以使基站进行信道估计。由于本发明实施例中不同UE的SRS之间非正交，因此基站可以在接收所述至少两个UE的SRS之后，利用串行干扰消除(SIC)方法对接收到的所述至 少两个UE的SRS进行信道估计，以提高估计精度。例如，基站可以首先对第一类型UE的SRS进行估计，并在估计后删除第一类型UE的SRS，随后再对第二类型UE的SRS进行估计。其中，当存在多个第一类型UE或多个第二类型UE时，在基站的信道估计的过程中，可以根据接收信号的质量从好到差逐次删除不同UE的SRS。
根据本发明实施例的SRS传输方法，可以将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
本发明实施例还提供一种探测参考信号传输方法，所述方法由UE执行。图8示出根据本发明实施例的SRS传输方法800的流程图。
如图8所示，在步骤S801中，接收基站发送的SRS配置信息。
在步骤S802中，从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交。
在基站所发送的SRS配置信息中，基站可以通过配置至少两个UE的SRS，使得所述UE的SRS与其他UE的SRS之间非正交来达到在给定信道资源的情况下提高SRS容量的目的。具体地，所述UE的SRS与其他UE的SRS之间可以为部分正交，也即发送所述UE的SRS与其他UE的SRS的子载波之间可以部分重合。
在本发明一个实施例中，所述UE的SRS可以为宽带SRS，当然也可以为窄带SRS。当所述UE为宽带SRS时，其他UE可以为窄带SRS；而当所述UE为窄带SRS时，其他UE可以为宽带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。
在步骤S803中，根据所述SRS配置信息发送所述UE的SRS。
在本步骤中，UE可以根据SRS配置信息相对应的SRS参考信号序列来发送SRS。如前所述，基站对SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输，以使UE获知相对应的配置好的SRS参考信号序列。
根据本发明实施例的SRS传输方法，可以使得基站将至少两个UE的 SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
本发明实施例还提供一种探测参考信号传输方法，所述方法由UE执行。图9示出根据本发明实施例的SRS传输方法900的流程图。
如图9所示，在步骤S901中，接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息。
当SRS的传输在频域上的基本构造单位为基础块时，基站所配置的UE的SRS配置信息中的带宽信息可以包括SRS所包含的基础块的信息，具体地，可以包括基础块的长度和基础块数目。此时，基站可以根据所确定的基础块的长度以及基础块数目确定相应的一个或多个UE的SRS的参考信号序列。例如，基站可以根据基础块的长度和数目自行配置UE的SRS参考信号序列，并告知UE；或者，UE也可以直接根据预设的与基础块的长度和数目确定相对应的参考信号序列配置，其中，基础块的长度或预设的SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输。例如，当在SRS配置中已将基础块的长度类型预设完毕时，需要使用与基础块的长度的类型(如配置ID)一一对应的指令来指示基础块的长度。
在本发明另一个实施例中，当SRS根据基础块为单位来配置时，基础块的长度可以与时频资源单位的长度相同或不同，例如，一个基础块的长度可以包括一个或多个时频资源单位。当然，基础块的长度也可以与资源块(RB)相同或不同，例如一个基础块可以为一个RB，也可以为RB的整数倍等。
在本发明的一个示例中，基站所配置的SRS的配置信息不仅可以包括SRS的基础块的长度、基础块数目，还可以包括指示梳齿间隔的间隔信息等信息。其中，基站可以通过高层信令(如RRC、MAC CE)或物理层信令(下层控制信息)来发送SRS配置信息。
在本发明另一个实施例中，基站所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
在步骤S902中，根据所述SRS配置信息发送所述UE的SRS。
在本步骤中，当UE接收到基站发送的SRS配置信息之后，可以根据相应的SRS参考信号序列来发送SRS。如前所述，基站对SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输，以使UE获知相对应的配置好的SRS参考信号序列。
根据本发明实施例的SRS传输方法，可以使得基站将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
下面，参照图10来描述根据本发明实施例的基站。该基站可以执行上述SRS传输方法。由于该基站的操作与上文所述的SRS传输方法的各个步骤基本相同，因此在这里只对其进行简要的描述，而省略对相同内容的重复描述。
如图10所示，基站1000包括生成单元1010和发送单元1020。需要认识到，图10仅示出与本发明的实施例相关的部件，而省略了其他部件，但这只是示意性的，根据需要，基站1000可以包括其他部件。
生成单元1010生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交。
在本发明一个实施例中，所述至少两个UE可以包括至少一个第一类型UE以及至少一个第二类型UE。其中，生成单元1010可以通过配置至少两个UE的SRS，使得其中的第一类型UE的SRS与第二类型UE的SRS之间非正交来达到在给定信道资源的情况下提高SRS容量的目的。具体地，所述第一类型UE的SRS与第二类型UE的SRS之间可以为部分正交，也即发送所述第一类型UE的SRS与第二类型UE的SRS的子载波之间可以部分重合。
在本发明一个实施例中，所述第一类型UE的SRS的带宽大于所述第二类型UE的SRS的带宽。也即所述第一类型UE的SRS可以为宽带SRS，而第二类型UE的SRS可以为窄带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。
在本发明另一个实施例中，生成单元1010可以通过将第一类型UE的 SRS的梳齿间隔设置为与所述第二类型UE的SRS的梳齿间隔不同，来实现所述第一类型UE和所述第二类型UE的SRS的参考信号序列之间非正交。图5示出了第一类型UE(UE1)的SRS和第二类型UE(UE2)的SRS的梳齿间隔设置的示例。如图5所示，第一类型UE的SRS的梳齿间隔可以设置为2，而第二类型UE的梳齿间隔可以设置为3，此时相同时频资源单位上的同一子载波可以既用来发送第一类型UE的SRS，又用来发送第二类型UE的SRS。在这种情况下，第一类型UE的SRS和第二类型UE的SRS之间是非完全正交的。可选地，第一类型UE的SRS的梳齿间隔可以与所述第二类型UE的SRS的梳齿间隔互质，这样能够使得不是所有的子载波均同时承载第一类型UE和第二类型UE的SRS，而可以分别有单独承载第一类型UE的SRS和第二类型UE的SRS的子载波，从而能够达到不同UE的SRS之间的干扰随机化处理，有利于后续基站对于各UE的SRS的信道估计的精确度的提升。例如，第一类型UE的SRS的梳齿间隔可以取3或5等值，而第二类型UE的SRS的梳齿间隔则可以取2或4等与其互质的值。
在本发明另一个实施例中，当第一类型UE为多个时，各个第一类型UE的SRS之间可以是相互正交的。此外，当所述第二类型UE为多个时，各个第二类型UE的SRS之间也可以是相互正交的。图6示出分别具有两个第一类型UE(UE1、UE3)和三个第二类型UE(UE2、UE4、UE5)的SRS配置示意图。其中UE1、UE3的梳齿间隔均为3，而UE2、UE4的梳齿间隔均为2，UE5的梳齿间隔为4。由图6可知，UE1和UE3两个宽带SRS之间相互正交，而UE2、UE4和UE5三个窄带SRS之间也分别相互正交。但是，UE1、UE3与UE2、UE4、UE5这两组宽带UE的SRS和窄带UE的SRS之间则是两两非正交的，在频域上存在同时承载两组中任两个SRS的子载波。
以上利用图5和图6例示了生成单元1010对不同带宽的UE的SRS通过梳齿间隔不同的配置来实现不同UE的SRS之间非正交的实施例。在上述示例中，生成单元1010所配置的SRS的配置信息可以包括SRS的带宽和/或指示梳齿间隔的间隔信息等信息。在本发明一个实施例中，SRS的带宽可以以时频资源单位来表示，其中时频资源单位可以为预设含义的给定时频资源。可选地，一个时频资源单位可以为LTE系统或NR中的一个或多个资源块(RB)。在本发明另一个实施例中，生成单元1010可以根据UE的SRS带宽类型来选择SRS参考信号序列的配置方式。例如，对于窄带SRS，生 成单元1010可以选择较短的根序列来配置SRS，例如可以选择LTE中使用的长度为31的ZC(Zadoff-Chu)序列；而对于宽带SRS，生成单元1010可以选择较长的根序列例如长度为61的ZC序列来配置SRS。实际传输的序列可以基于上述长度的ZC序列进行循环移位(CS,cyclic shift)得到。
在本发明另一个实施例中，生成单元1010所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
在本发明另一个实施例中，当组成UE的SRS的基本单位为基础块时，生成单元1010可以根据基础块的信息，生成至少两个UE中任意一个或多个UE的SRS配置信息。其中，生成单元1010所配置的SRS配置信息中的带宽信息可以包括SRS所包含的基础块的信息，具体为基础块的长度和基础块数目。随后，生成单元1010可以根据所确定的基础块的长度以及基础块数目确定相应的一个或多个UE的SRS的参考信号序列。例如，生成单元1010可以根据基础块的长度和数目自行配置UE的SRS参考信号序列，并告知UE；或者，UE也可以直接根据预设的与基础块的长度和数目相对应的序列配置来发送SRS，其中，基础块的长度信息或预设的SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输。其中，当在SRS配置中已将基础块的长度类型预设完毕时，生成单元1010需要使用与基础块的长度的类型(如配置ID)一一对应的指令来指示基础块的长度。
当SRS的传输在频域上的基本构造单位为基础块时，与前述类似，所述至少两个UE也可以包括至少一个第一类型UE以及至少一个第二类型UE，其中所述第一类型UE的SRS的带宽大于所述第二类型UE的SRS的带宽。也即所述第一类型UE的SRS可以为宽带SRS，而第二类型UE的SRS可以为窄带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。其中，用于配置第一类型UE的SRS 的基础块可以为第一基础块，而用来配置第二类型UE的SRS的基础块可以为第二基础块。在本发明另一个实施例中，基础块的长度可以与时频资源单位的长度相同或不同，例如，一个基础块的长度可以包括一个或多个时频资源单位。当然，基础块的长度也可以与资源块(RB)相同或不同，例如一个基础块可以为一个RB，也可以为RB的整数倍等。在本发明一个实施例中，生成单元1010可以根据基础块的信息，仅生成第一类型UE的SRS配置信息；或根据基础块的信息，仅生成第二类型UE的SRS配置信息。当然，在本发明另一个实施例中，生成单元1010也可以根据相同或不同的基础块信息，分别生成第一类型UE和第二类型UE的SRS配置信息。在本发明另一个实施例中，当所述第一类型UE的SRS和所述第二类型UE的SRS均根据基础块配置时，生成单元1010用于配置第一类型UE的SRS的第一基础块的长度与用于配置第二类型UE的SRS的第二基础块的长度可以相同或不同，此外，所述第一基础块的数目与所述第二基础块的数目也可以相同或不同。此外，在本发明另一个实施例中，不论所述第一基础块与所述第二基础块的长度和/或数目相同还是不同，生成单元1010均可以利用前述的不同的梳齿间隔来实现第一类型UE和第二类型UE的SRS的非正交。
图7示出了当配置第一类型UE(UE6)的SRS的第一基础块长度与配置第二类型UE(UE7)的SRS的第二基础块不同，但数目相同时，利用不同的梳齿间隔来实现二者SRS非正交的配置示例。其中，配置UE6的第一基础块长度为配置UE7的第二基础块的两倍，UE6的梳齿间隔为3，UE7的梳齿间隔为2。在图7所示的实施例中，配置UE7的第二基础块的长度可以为1个RB，相应地，配置UE6的第一基础块长度则可以为2个RB。可选地，第一类型UE的SRS的梳齿间隔可以与所述第二类型UE的SRS的梳齿间隔互质，这样能够使得不是所有的子载波均同时承载第一类型UE和第二类型UE的SRS，而可以分别有单独承载第一类型UE的SRS和第二类型UE的SRS的子载波，从而能够达到不同UE的SRS之间的干扰随机化处理，有利于后续基站对于各UE的SRS的信道估计。例如，第一类型UE的SRS的梳齿间隔可以取3或5等值，而第二类型UE的SRS的梳齿间隔则可以取2或4等与其互质的值。
在本发明另一个实施例中,当SRS的传输在频域上的基本构造单位为第一基础块或第二基础块时,每种基础块的SRS发射序列可以基于不同给定 长度的ZC序列来构造，例如第一基础块使用长度为61的ZC序列，第二基础块使用长度为31的ZC序列。每个基础块上的SRS发射序列可以是所述ZC序列通过循环移位得到。
在本发明另一个实施例中，在SRS的传输在频域上的基本构造单位为基础块的前提下，当第一类型UE为多个时，各个第一类型UE的SRS之间可以是相互正交的。其中，配置所述多个第一类型UE的基础块的长度和/或数目可以彼此相同或不同。此外，当所述第二类型UE为多个时，各个第二类型UE的SRS之间也可以是相互正交的。同样地，配置所述多个第二类型UE的基础块的长度和/或数目也可以彼此相同或不同。
在上述根据基础块配置SRS的示例中，生成单元1010所配置的SRS的配置信息可以包括SRS的基础块的长度、基础块数目和/或指示梳齿间隔的间隔信息等信息。当UE接收到基站发送的SRS配置信息之后，可以根据配置好的相应的SRS参考信号序列来发送SRS。其中，基站可以通过高层信令(如RRC、MAC CE)或物理层信令(下层控制信息)来发送SRS配置信息。在本发明另一个实施例中，基站可以根据UE的SRS带宽类型来选择SRS参考信号序列的配置方式。例如，对于窄带SRS，基站可以选择较短的根序列来配置SRS，例如可以选择LTE中使用的长度为31的ZC(Zadoff-Chu)序列；而对于宽带SRS，基站可以选择较长的根序列例如长度为61的ZC序列来配置SRS。实际传输的序列可以基于上述长度的ZC序列进行循环移位(CS,cyclic shift)得到。
在本发明另一个实施例中，生成单元1010所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
发送单元1020发送所述至少两个UE的SRS配置信息。
当发送单元1020向至少两个UE发送所述SRS配置信息之后，相应的UE可以根据所述SRS配置信息来发送SRS，以使基站进行信道估计。由于本发明实施例中不同UE的SRS之间非正交，因此可以在接收单元(未示出)接收所述至少两个UE的SRS之后，令估计单元(未示出)利用串行干扰消除(SIC)方法对接收到的所述至少两个UE的SRS进行信道估计，以提高 估计精度。例如，估计单元可以首先对第一类型UE的SRS进行估计，并在估计后删除第一类型UE的SRS，随后再对第二类型UE的SRS进行估计。其中，当存在多个第一类型UE或多个第二类型UE时，在基站的信道估计的过程中，可以根据接收信号的质量从好到差逐次删除不同UE的SRS。
根据本发明实施例的基站，可以将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
下面，参照图11来描述根据本发明实施例的UE。该UE可以执行上述SRS传输方法。由于该UE的操作与图8中所述的SRS传输方法的各个步骤基本相同，因此在这里只对其进行简要的描述，而省略对相同内容的重复描述。
如图11所示，UE1100可以包括接收单元1110、获取单元1120和发送单元1130。需要认识到，图11仅示出与本发明的实施例相关的部件，而省略了其他部件，但这只是示意性的，根据需要，UE1100可以包括其他部件。
接收单元1110接收基站发送的SRS配置信息。
获取单元1120从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交。
在基站所发送的SRS配置信息中，基站可以通过配置至少两个UE的SRS，使得所述UE的SRS与其他UE的SRS之间非正交来达到在给定信道资源的情况下提高SRS容量的目的。具体地，所述UE的SRS与其他UE的SRS之间可以为部分正交，也即发送所述UE的SRS与其他UE的SRS的子载波之间可以部分重合。
在本发明一个实施例中，所述UE的SRS可以为宽带SRS，当然也可以为窄带SRS。当所述UE为宽带SRS时，其他UE可以为窄带SRS；而当所述UE为窄带SRS时，其他UE可以为宽带SRS。本发明实施例中的宽带和窄带是相对概念，例如，可以利用预设阈值来区分宽带SRS和窄带SRS，即将带宽大于预设阈值的SRS作为宽带SRS，而将带宽小于或等于预设阈值的SRS作为窄带SRS。在本发明另一个实施例中，宽带SRS的带宽可以为窄带SRS的倍数，例如宽带SRS的带宽可以为窄带SRS的2倍，或4倍。
发送单元1130根据所述SRS配置信息发送所述UE的SRS。
发送单元1130可以根据SRS配置信息相对应的SRS参考信号序列来发 送SRS。如前所述，基站对SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输，以使UE获知相对应的配置好的SRS参考信号序列。
根据本发明实施例的UE，可以使得基站将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
下面，参照图12来描述根据本发明实施例的UE。该UE可以执行上述SRS传输方法。由于该UE的操作与图9中所述的SRS传输方法的各个步骤基本相同，因此在这里只对其进行简要的描述，而省略对相同内容的重复描述。
如图12所示，UE 1200可以包括接收单元1210发送单元1220。需要认识到，图12仅示出与本发明的实施例相关的部件，而省略了其他部件，但这只是示意性的，根据需要，UE 1200可以包括其他部件。
接收单元1010接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息。
当SRS的传输在频域上的基本构造单位为基础块时，基站所配置的UE的SRS配置信息中的带宽信息可以包括SRS所包含的基础块的信息，具体地，可以包括基础块的长度和基础块数目。此时，基站可以根据所确定的基础块的长度以及基础块数目确定相应的一个或多个UE的SRS的参考信号序列。例如，基站可以根据基础块的长度和数目自行配置UE的SRS参考信号序列，并告知UE；或者，接收单元1010也可以直接根据预设的与基础块的长度和数目确定相对应的参考信号序列配置，其中，基础块的长度或预设的SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输。例如，当在SRS配置中已将基础块的长度类型预设完毕时，需要使用与基础块的长度的类型(如配置ID)一一对应的指令来指示基础块的长度。
在本发明另一个实施例中，当SRS根据基础块为单位来配置时，基础块的长度可以与时频资源单位的长度相同或不同，例如，一个基础块的长度可以包括一个或多个时频资源单位。当然，基础块的长度也可以与资源块(RB)相同或不同，例如一个基础块可以为一个RB，也可以为RB的整数倍等。
在本发明的一个示例中，基站所配置的SRS的配置信息不仅可以包括SRS的基础块的长度、基础块数目，还可以包括指示梳齿间隔的间隔信息等信息。其中，基站可以通过高层信令(如RRC、MAC CE)或物理层信令(下层控制信息)来发送SRS配置信息。
在本发明另一个实施例中，基站所配置的UE的SRS可以为周期SRS，也可以为非周期的SRS。其中，当SRS为周期SRS时，SRS配置信息还可以包括SRS的发送周期等信息。而当SRS为非周期SRS时，基站将通过物理下行控制信道PDCCH触发SRS的发送，当基站触发后，相应的UE仅发送一次SRS。
发送单元1220根据所述SRS配置信息发送所述UE的SRS。
当接收单元1210接收到基站发送的SRS配置信息之后，发送单元1220可以根据相应的SRS参考信号序列来发送SRS。如前所述，基站对SRS参考信号序列的配置可以由基站预先告知UE，也可以写入标准中或利用信令传输，以使UE获知相对应的配置好的SRS参考信号序列。
根据本发明实施例的UE，可以使得基站将至少两个UE的SRS参考信号序列配置为非正交，从而能够在给定信道资源的情况下允许更多的UE发送SRS进行信道测量，有效提高了SRS的容量。
另外，上述实施方式的说明中使用的框图示出了以功能为单位的块。这些功能块(结构单元)通过硬件和/或软件的任意组合来实现。此外，各功能块的实现手段并不特别限定。即，各功能块可以通过在物理上和/或逻辑上相结合的一个装置来实现，也可以将在物理上和/或逻辑上相分离的两个以上装置直接地和/或间接地(例如通过有线和/或无线)连接从而通过上述多个装置来实现。
例如，本发明的一实施方式中的基站1000、UE 1100或UE1200等可以作为执行本发明的无线通信方法的处理的计算机来发挥功能。图13是示出本发明的一实施方式所涉及的基站或UE的硬件结构的一例的图。上述的基站1000、UE 1100或UE1200可以作为在物理上包括处理器1301、内存1302、存储器1303、通信装置1304、输入装置1305、输出装置1306、总线1307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。基站1000、UE 1100或UE1200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1301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1301可以通过一个以上的芯片来安装。
基站1000、UE 1100或UE1200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1301、内存1302等硬件上，从而使处理器1301进行运算，对由通信装置1304进行的通信进行控制，并对内存1302和存储器1303中的数据的读出和/或写入进行控制。
处理器1301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1301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1301将程序(程序代码)、软件模块、数据等从存储器1303和/或通信装置1304读出到内存1302，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。
内存1302是计算机可读取记录介质，例如可以由只读存储器(ROM，ReadOnlyMemory)、可编程只读存储器(EPROM，ErasableProgrammableROM)、电可编程只读存储器(EEPROM，ElectricallyEPROM)、随机存取存储器(RAM，RandomAccessMemory)、其它适当的存储介质中的至少一个来构成。内存1302也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存1302可以保存用于实施本发明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1303是计算机可读取记录介质，例如可以由软磁盘(flexible disk)、软(注册商标)盘(floppy disk)、磁光盘(例如，只读光盘(CD-ROM(CompactDiscROM)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1304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1304为了实现例如频分双工(FDD，FrequencyDivisionDuplex) 和/或时分双工(TDD，TimeDivisionDuplex)，可以包括高频开关、双工器、滤波器、频率合成器等。
输入装置1305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1306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，LightEmittingDiode)灯等)。另外，输入装置1305和输出装置1306也可以为一体的结构(例如触控面板)。
此外，处理器1301、内存1302等各装置通过用于对信息进行通信的总线1307连接。总线1307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，基站1000、UE 1100或UE1200可以包括微处理器、数字信号处理器(DSP，DigitalSignalProcessor)、专用集成电路(ASIC，ApplicationSpecificIntegratedCircuit)、可编程逻辑器件(PLD，ProgrammableLogicDevice)、现场可编程门阵列(FPGA，FieldProgrammableGateArray)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1301可以通过这些硬件中的至少一个来安装。
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(ReferenceSignal)，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，ComponentCarrier)也可以称为小区、频率载波、载波频率等。
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，OrthogonalFrequencyDivisionMultiplexing)符号、单载波频分多址(SC-FDMA，SingleCarrierFrequencyDivisionMultipleAccess)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，TransmissionTimeInterval)，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，无线基站对各用户设备进行以TTI为单位分配无线资源(在各用户设备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(数据块)、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，实际上与数据块、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，ResourceBlock)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，PhysicalRB)、子载波组(SCG，Sub-CarrierGroup)、资源单元组(REG，Resource ElementGroup)、PRG对、RB对等。
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，PhysicalUplinkControlChannel)、物理下行链路控制信道(PDCCH，PhysicalDownlinkControlChannel)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，DownlinkControlInformation)、上行链路控制信息(UCI，UplinkControlInformation))、上层信令(例如，无线资源控制(RRC，RadioResourceControl)信令、广播信息(主信息块(MIB，MasterInformationBlock)、系统信息块(SIB，SystemInformationBlock)等)、媒体存取控制(MAC，MediumAccessControl)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，DigitalSubscriberLine)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，BaseStation)”、“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(fixedstation)、NodeB、eNodeB(eNB)、接入点(accesspoint)、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，RemoteRadioHead)))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，MobileStation)”、“用户设备(userterminal)”、“用户装置(UE，UserEquipment)”以及“终端”这样的用语可以互换使用。基站有时也以固定台(fixedstation)、NodeB、eNodeB(eNB)、接入点(accesspoint)、发送点、接收点、毫微微小区、小小区等用语来称呼。
用户设备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设备来替换。例如，对于将无线基站和用户设备间的通信替换为多个用户设备间(D2D，Device-to-Device)的通信的结构，也可以应用本发明的各方式/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设备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，本说明书中的用户设备也可以用无线基站来替换。
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(uppernode)来进行。显然，在具有基站的由一个或多个网络节点(networknodes)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，MobilityManagementEntity)、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，LongTermEvolution)、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(lookingup)(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。
以上对本发明进行了详细说明，但对于本领域技术人员而言，显然，本发明并非限定于本说明书中说明的实施方式。本发明在不脱离由权利要求书的记载所确定的本发明的宗旨和范围的前提下，可以作为修改和变更方式来实施。因此，本说明书的记载是以示例说明为目的，对本发明而言并非具有任何限制性的意义。

Claims (25)

  1. 一种探测参考信号(SRS)传输方法，由基站执行，包括：
    生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交；
    发送所述至少两个UE的SRS配置信息。
  2. 如权利要求1所述的方法，其中，所述SRS配置信息包括：
    指示SRS的梳齿间隔的间隔信息。
  3. 如权利要求1所述的方法，其中，
    所述第一类型UE的带宽大于所述第二类型UE的带宽。
  4. 如权利要求2所述的方法，其中，
    所述第一类型UE的间隔信息所指示的梳齿间隔与所述第二类型UE的间隔信息所指示的梳齿间隔不同。
  5. 如权利要求4所述的方法，其中，
    所述第一类型UE的的间隔信息所指示的梳齿间隔与所述第二类型UE的间隔信息所指示的梳齿间隔互质。
  6. 如权利要求1所述的方法，其中，
    当所述至少两个UE中包括多个第一类型UE时，各个第一类型UE的SRS正交。
  7. 如权利要求1所述的方法，其中，
    当所述至少两个UE中包括多个第二类型UE时，各个第二类型UE的SRS正交。
  8. 如权利要求1所述的方法，其中，所述生成至少两个UE的SRS配置信息包括：
    根据基础块的信息，生成至少两个UE中任意一个或多个UE的SRS配置信息，其中所述基础块包括一个或多个时频资源单位。
  9. 如权利要求8所述的方法，其中，所述SRS配置信息还包括：
    所述基础块的长度和/或所述基础块数目。
  10. 如权利要求8所述的方法，其中，当所述第一类型UE和所述第二类型UE的SRS均根据基础块配置时，
    用于配置第一类型UE的SRS的第一基础块的长度与用于配置第二类型 UE的SRS的第二基础块的长度不同；和/或，
    所述第一基础块的数目与所述第二基础块的数目不同。
  11. 如权利要求1所述的方法，其中，所述方法还包括：
    接收所述至少两个UE的SRS；
    利用串行干扰消除方法对接收到的所述至少两个UE的SRS进行信道估计。
  12. 一种探测参考信号(SRS)传输方法，由用户设备(UE)执行，包括：
    接收基站发送的SRS配置信息；
    从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交；
    根据所述SRS配置信息发送所述UE的SRS。
  13. 一种探测参考信号(SRS)传输方法，由用户设备(UE)执行，包括：
    接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息；
    根据所述SRS配置信息发送所述UE的SRS。
  14. 一种基站，包括：
    生成单元，配置为生成至少两个UE的SRS配置信息，使得所述至少两个UE中第一类型UE的SRS与所述至少两个UE中第二类型UE的SRS非正交；
    发送单元，配置为发送所述至少两个UE的SRS配置信息。
  15. 如权利要求14所述的基站，其中，所述SRS配置信息包括：
    指示SRS的梳齿间隔的间隔信息。
  16. 如权利要求14所述的基站，其中，
    所述第一类型UE的带宽大于所述第二类型UE的带宽。
  17. 如权利要求15所述的基站，其中，
    所述第一类型UE的间隔信息所指示的梳齿间隔与所述第二类型UE的间隔信息所指示的梳齿间隔不同。
  18. 如权利要求14所述的基站，其中，
    当所述至少两个UE中包括多个第一类型UE时，各个第一类型UE的 SRS正交。
  19. 如权利要求14所述的基站，其中，
    当所述至少两个UE中包括多个第二类型UE时，各个第二类型UE的SRS正交。
  20. 如权利要求14所述的基站，其中，
    所述生成单元根据基础块的信息，生成至少两个UE中任意一个或多个UE的SRS配置信息，其中所述基础块包括时频资源单位。
  21. 如权利要求20所述的基站，其中，所述SRS配置信息还包括：
    所述基础块的长度和/或所述基础块数目。
  22. 如权利要求20所述的基站，其中，
    当所述第一类型UE和所述第二类型UE的SRS均根据基础块配置时，
    用于配置第一类型UE的SRS的第一基础块的长度与用于配置第二类型UE的SRS的第二基础块的长度不同；和/或，
    所述第一基础块的数目与所述第二基础块的数目不同。
  23. 如权利要求14所述的基站，其中，所述基站还包括：
    接收单元，配置为接收所述至少两个UE的SRS；
    估计单元，配置为利用串行干扰消除方法对接收到的所述至少两个UE的SRS进行信道估计。
  24. 一种用户设备(UE)，包括：
    接收单元，配置为接收基站发送的SRS配置信息；
    获取单元，配置为从所述SRS配置信息中获取所述UE的SRS配置，其中所述UE的SRS与其他UE的SRS非正交；
    发送单元，配置为根据所述SRS配置信息发送所述UE的SRS。
  25. 一种用户设备(UE)，包括：
    接收单元，配置为接收基站发送的SRS配置信息，所述SRS配置信息包括所述UE的SRS所包含的基础块的信息；
    发送单元，配置为根据所述SRS配置信息发送所述UE的SRS。
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