WO2020118536A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020118536A1
WO2020118536A1 PCT/CN2018/120412 CN2018120412W WO2020118536A1 WO 2020118536 A1 WO2020118536 A1 WO 2020118536A1 CN 2018120412 W CN2018120412 W CN 2018120412W WO 2020118536 A1 WO2020118536 A1 WO 2020118536A1
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Prior art keywords
sequence
group
length
value
base
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PCT/CN2018/120412
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English (en)
Chinese (zh)
Inventor
曲秉玉
李雪茹
周永行
张瑞齐
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华为技术有限公司
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Priority to PCT/CN2018/120412 priority Critical patent/WO2020118536A1/fr
Priority to PCT/CN2019/099869 priority patent/WO2020119154A1/fr
Priority to CN201980076990.8A priority patent/CN113170486B/zh
Publication of WO2020118536A1 publication Critical patent/WO2020118536A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • This application relates to the field of wireless communication technology, and in particular, to a communication method and device.
  • uplink reference signals such as uplink demodulation reference signals (DMRS) and uplink sounding reference signals (SRS)
  • DMRS uplink demodulation reference signals
  • SRS uplink sounding reference signals
  • M is an integer greater than 1
  • ⁇ is a value determined by the time-domain cyclic shift value, is a real number
  • j is a unit of an imaginary number
  • A is a complex number.
  • the above-mentioned base sequence may be a sequence generated by a ZC (Zadoff-Chu) sequence, for example, the ZC sequence itself, or a sequence generated by cyclic expansion or interception of the ZC sequence.
  • the ZC sequence of length N can be expressed as follows:
  • N is the length of the ZC sequence, which is an integer greater than 1
  • q is the root index of the ZC sequence, is a natural number that is relatively prime to N, and 0 ⁇ q ⁇ N.
  • the above reference signal is SRS as an example.
  • the terminal device Before sending the SRS, the terminal device needs to determine the SRS sequence according to the base sequence.
  • the length M of various SRS sequences is specified, and 60 base sequences are defined for each value of M greater than or equal to 72.
  • Table 1 The relationship between the root indexes of these ZC sequences and the group number of the base sequence can be referred to Table 1:
  • Each cell can allocate 2 base sequences of the same length to the terminal equipment to generate the final transmitted SRS sequence.
  • each terminal device transmitting an SRS sequence of the same length at the same time uses the SRS sequence generated by the same base sequence in the group.
  • these terminal devices obtain orthogonality between SRS sequences by using different time-domain cyclic shifts and/or time-frequency domain resources.
  • two base sequences of the same group are used as hopping sequences, that is, at different times, the base sequence used by a terminal device can be carried out between the two base sequences in this group according to the design pattern. Hopping, whose purpose is to randomize inter-cell interference.
  • all terminal devices in the same cell that send the same length SRS sequence still use the same base sequence to generate the SRS sequence.
  • the number of terminal devices in each cell is large (for example, 200), and the number of time-domain cyclic shifts that can obtain good orthogonality in the actual system and the number of available time-frequency domain resources are very limited. Therefore, the current number of available SRS sequences in a cell is far from satisfying the huge number of terminal devices. This leads to the need for different terminal devices to send SRS in turn by time division, resulting in a large SRS cycle, such as 20ms.
  • the channel has time-varying characteristics, and the large SRS period causes the channel state information obtained through SRS to be easily outdated. The channel state information during downlink data transmission is very different from the channel state information previously measured according to SRS, which seriously affects the system. Performance.
  • the number of terminal devices that can support the transmission of SRS sequences of the same length at the same time is doubled, and the number of supported SRS The cycle is reduced to half of the original.
  • such a solution is likely to cause great interference between SRS sequences used by different terminal devices in the same cell.
  • the purpose of the embodiments of the present application is to provide a communication method and device to solve the problem that at least two base sequences in each group having different root indexes and having the same length are allocated to different terminal devices at the same time, generated by different base sequences The problem of greater interference between reference signal sequences.
  • an embodiment of the present application provides a communication method, including: a terminal device generating a reference signal sequence of length M, where M is an integer greater than 1; the reference signal sequence is assigned by the first to the terminal device A base sequence of length M in the sequence group is generated, the number of base sequences of length M in the first sequence group is X, and the i-th base sequence in the X base sequences is determined by the length of N and the root index of the ZC sequence generated q i, q i is an integer of 1 to N-1, and N is an integer greater than 1, when the value i is not the same, different values q i; wherein, When X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, and the second of the two base sequences The root index of the second ZC sequence corresponding to the sequence is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and
  • the absolute value of V is greater than 1 and less than N-1, that is, the lower limit of the value is greater than 1, and the upper limit of the value is less than N-1.
  • the lower limit of the absolute value of the V is larger.
  • the absolute value of V is greater than 2.
  • the network device may allocate two base sequences of the same length in a sequence group to different terminal devices at the same time, so that the number of reference signal sequences that can be allocated in one network device becomes twice the original. Increasing the number of reference signal sequences without increasing interference between reference signal sequences improves the accuracy of channel estimation based on the reference signals.
  • the network device can allocate the at least three base sequences in the sequence group to different terminal devices at the same time, which can make it possible for a cell
  • the number of supported terminal devices that simultaneously send reference signals of the same length becomes at least three times the original.
  • the root index of the ZC sequence that generates at least three base sequences of the same length in a sequence group is redesigned, the cross-correlation of the at least three base sequences in a sequence group is very low, making the reference
  • the interference between signal sequences is much lower than that of signals, and the accuracy of channel estimation based on reference signal sequences can be improved compared to the prior art.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the method further includes:
  • the terminal device obtains first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information Used to indicate one of the X base sequences;
  • the terminal device obtains the reference signal sequence according to the first indication information and the second indication information.
  • the cell identifier of the first sequence group is c1
  • the value of V is V1
  • the value of V is V1.
  • the cell identifier of the first sequence group is c2
  • the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
  • the value of V is related to the group identifier or cell identifier of the first sequence group, and it is helpful for the sequence group allocated by the network device, each sequence group includes the number of base sequences of length M There may be many, so that the same cell can support more terminal devices to send reference signal sequences on the same time-frequency resources, and ensure that the inter-sequence interference is small.
  • the root index of the ZC sequence of the base sequence of the group (for example, 30 sequence groups) is not repeated, while ensuring that the cross-correlation of the base sequence in each sequence group is very low, and the cross-correlation of the base sequences of different sequence groups is relatively Based on the existing technology, it will not increase.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small.
  • the absolute values of the V all take the same value, it will result in little interference between the base sequences in the first sequence group when there are only a few values of length M
  • the interference between the base sequences in the first sequence group is greater.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • each element of the set A is various possible values of the absolute value of V.
  • an embodiment of the present application provides a communication device including a processor coupled to a memory, wherein: the memory is used to store instructions; the processor is used to execute instructions stored in the memory to execute A method in the above first aspect or any possible design of the first aspect.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver for supporting the communication device to send and/or receive information in the above method.
  • the communication device may be a terminal device, or a device in the terminal device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices.
  • an embodiment of the present application provides a communication device for implementing the first aspect or any method in the first aspect, including a corresponding functional module, for example, including a processing unit, a transceiver unit, etc., respectively Implement the steps in the above method.
  • an embodiment of the present application provides a communication method, including: a network device sending configuration information, where the configuration information is used to configure a first sequence group, and the number of base sequences of length M in the first sequence group Is X, the i-th base sequence of the X base sequences is generated by a ZC sequence of length N and root index q i , q i is an integer from 1 to N-1, and N is greater than 1.
  • the absolute value of V is greater than 1 and less than N-1, that is, the lower limit of the value is greater than 1, and the upper limit of the value is less than N-1.
  • the lower limit of the absolute value of the V is larger.
  • the absolute value of V is greater than 2.
  • the network device may allocate two base sequences of the same length in a sequence group to different terminal devices at the same time, so that the number of reference signal sequences that can be allocated in one network device becomes twice the original. Increasing the number of reference signal sequences without increasing interference between reference signal sequences improves the accuracy of channel estimation based on the reference signals.
  • the network device can allocate the at least three sequences in the sequence group to different terminal devices at the same time, which can be supported in a cell
  • the number of terminal devices that simultaneously send reference signals becomes at least three times the original.
  • the cross-correlation of the at least three base sequences in a sequence group is guaranteed to be very low , So that the interference between reference signal sequences is much lower than the signal, and the accuracy of channel estimation based on the reference signal sequence can be improved compared to the prior art.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the method further includes:
  • the network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.
  • the value of V when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the inter-sequence interference of base sequences of the same length in the first sequence group can be very small.
  • the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • each element of set A is a possible value of the absolute value of V.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor.
  • the processor is coupled to a memory.
  • the memory is used to store instructions.
  • the processor is used to execute instructions stored in the memory.
  • the method in the above fourth aspect or any possible design of the fourth aspect is performed.
  • the communication device may further include the memory.
  • the communication device may further include a transceiver for supporting the communication device to send and/or receive information in the above method.
  • the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices.
  • an embodiment of the present application provides a communication device for implementing the above fourth aspect or any method in the fourth aspect, including corresponding functional modules, such as a processing unit, a transceiver unit, etc., respectively Implement the steps in the above method.
  • Embodiments of the present application provide a computer-readable storage medium that stores computer-readable instructions.
  • the communication device When a computer reads and executes the computer-readable instructions, the communication device causes the communication device to execute any of the above possible Method in design.
  • An embodiment of the present application provides a computer program product that, when a computer reads and executes the computer program product, causes a communication device to perform any of the above-mentioned methods in possible designs.
  • An embodiment of the present application provides a chip that is connected to a memory and used to read and execute a software program stored in the memory to implement any one of the above-mentioned possible design methods.
  • An embodiment of the present application provides a communication system, including the communication device in the second aspect and the communication device in the fifth aspect.
  • FIG. 1 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • FIG. 2 is a schematic structural diagram of a terminal device according to an embodiment of this application.
  • FIG. 3 is a schematic structural diagram of a terminal device according to an embodiment of this application.
  • FIG. 4 is a schematic structural diagram of a network device according to an embodiment of this application.
  • FIG. 5 is a schematic structural diagram of a network device according to an embodiment of this application.
  • the embodiments of the present application can be applied to various mobile communication systems, such as: new radio (NR) system, global mobile communication (GSM) system, code division multiple access (CDMA) ) System, wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (LTE) system, advanced long term evolution (advanced long) Term-evolution (LTE-A) system, universal mobile communication system (universal mobile telecommunication system, UMTS), evolved long-term evolution (evolved long term evolution, eLTE) system, future communication system and other communication systems, specifically, not here Do restrictions.
  • NR new radio
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • UMTS universal mobile communication system
  • eLTE evolved long-term evolution
  • future communication system and other communication systems specifically, not here Do restrictions
  • the terminal device may be a device with wireless transceiver function or a chip that can be installed in any device, and may also be called a user equipment (UE), an access terminal, a user unit, and a user station , Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device.
  • UE user equipment
  • Mobile station mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device.
  • the terminal devices in the embodiments of the present application may be mobile phones, tablet computers, computers with wireless transceiver functions, virtual reality (virtual reality, VR) terminals, augmented reality (augmented reality, AR) terminals, industrial Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grids, transportation safety
  • virtual reality virtual reality
  • AR augmented reality
  • industrial Wireless terminals in industrial control wireless terminals in self-driving
  • wireless terminals in remote medical wireless terminals in smart grids
  • transportation safety The wireless terminal in the smart phone, the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc.
  • the network equipment may be an evolutionary base station (evolutional node B, eNB) in the LTE system, a global mobile communication (GSM) system or a code division multiple access (CDMA) system.
  • eNB evolutionary base station
  • GSM global mobile communication
  • CDMA code division multiple access
  • a base station (base transceiver) (BTS) can also be a base station (nodeB, NB) in a wideband code division multiple access (wideband code division multiple access, WCDMA) system.
  • FIG. 1 it is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • the method includes:
  • Step 101 The network device sends configuration information, where the configuration information is used to configure the first sequence group.
  • Step 102 The terminal device generates a reference signal sequence of length M.
  • the reference signal sequence is generated by a base sequence of length M in the first sequence group assigned to the terminal device, and the length of the first sequence group is M
  • the number of base sequences is X
  • the i-th base sequence in the X base sequences is generated by a ZC sequence of length N and root index q i , where q i is an integer from 1 to N-1 , N is an integer greater than 1, and the value of q i is different when the value of i is different;
  • X is an integer greater than or equal to 2
  • the root index of the first ZC sequence corresponding to a sequence is q
  • the root index of the second ZC sequence corresponding to the second sequence in any two base sequences is (q+V) mod N, and the absolute value of V Is an integer greater than or equal to K1 and less than or equal to N-K1, K1>1; or, when X is an integer greater than or equal to 3, the root index of the
  • the first sequence group may include multiple base sequences of different lengths.
  • the first sequence group includes X1 base sequences of length M1, and also includes X2 base sequences of length M2, where M1 is not equal to M2.
  • the terminal device may determine the base sequence under the length of each reference signal sequence according to the first sequence group.
  • the terminal device determines the length M of the reference signal sequence by further receiving configuration information, so as to determine the X base sequences to which the terminal device is allocated under the length M.
  • the first sequence group allocated to the terminal device may be a first sequence group assigned by the network device through terminal device-specific signaling (such as dedicated radio resource control (RRC) signaling).
  • the base sequence assigned to the terminal equipment may also be network equipment through cell-level signaling (such as cell-specific RRC signaling, system information block (SIB) signaling, master information block (master information) block, MIB, signaling, etc.)
  • the base sequence of the first sequence group is uniformly allocated to multiple terminal devices in the cell served by the network device, and thus allocated to the terminal device. This embodiment of the present application is not limited to this, and details are not described herein again.
  • the first sequence group allocated to the terminal device is characterized in that a group of base sequences is allocated to the terminal device.
  • the set of base sequences is a sequence potentially used by the terminal device to generate a reference signal sequence.
  • the terminal device may further determine the base sequence on which the reference signal sequence sent at a certain moment is generated through other configuration information.
  • the first sequence group allocated to the terminal device does not require the terminal device to store all X base sequences of the first sequence group according to the result of the allocation, but rather that the terminal device can be based on a predefined
  • the rules and other signaling configurations can generate a reference signal sequence to be transmitted according to any one of the X base sequences when needed.
  • first sequence and the second sequence are any two of the X base sequences, which means that any two sequences in the X base sequences are arbitrarily selected as the first In the sequence and the second sequence, if the root index of the first ZC sequence that generates the first sequence is q, the root index of the second ZC sequence that generates the second sequence can be written as (q+V) mod N. That is, the root index of the ZC sequence that generates any two base sequences satisfies this relationship.
  • first ZC sequence corresponding to the first sequence of any two of the X base sequences corresponds to the first ZC sequence corresponding to the first sequence refers to generating the first sequence The first ZC sequence.
  • the "correspondence" here refers to this relationship of generating a base sequence from a ZC sequence.
  • second ZC sequence corresponding to the second sequence in any two base sequences refers to the second ZC sequence that generates the second sequence. I will not repeat them later.
  • Step 103 The terminal device sends the reference signal sequence.
  • Step 104 The network device receives the reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.
  • the first sequence group allocated by the network device to the terminal device is determined from L sequence groups, and L is an integer greater than or equal to 2.
  • L is an integer greater than or equal to 2.
  • at least one sequence group includes X base sequences of length M, and the number of base sequences of length M included in different sequence groups may be the same or different, which is not limited in the embodiments of the present application .
  • X base sequences of length M are generated by ZC sequences of the same length and different root indexes.
  • the specific formula is:
  • the L sequence groups have different sequence group identifiers, or cell identifiers.
  • the terminal device obtains the sequence group identifier or cell identifier of the first sequence group by receiving the first indication information.
  • the terminal device may determine a set of base sequences allocated to itself, and this set of base sequences may include multiple length base sequences, where the length is the M base sequence number The number is X.
  • the terminal device may substitute the group identifier or the cell identifier according to the formula for generating the reference signal sequence to obtain a set of base sequences allocated to itself, or obtain the reference signal sequence.
  • the terminal device obtains a set of base sequences allocated to itself according to the predefined table and the first instruction information.
  • the predefined table defines one or more base sequences included in each sequence group, and the terminal device learns the X base sequences through the first indication information.
  • the pre-defined table defines the root index of the ZC sequence included in each sequence group to generate one or more base sequences of the sequence group, and the terminal device knows the ZC that generates the X base sequences through the first indication information Serial root indicator.
  • the ZC sequence root index q i for generating the i-th base sequence in the X base sequences satisfies:
  • u is the group ID or cell ID of the first sequence group
  • f(u) is an integer determined according to u
  • V is an element in the set S
  • the set S includes only X different elements V 1 , V 2 ..., V X.
  • the network device notifies the value of u through the first signaling, that is, X base sequences are allocated to the terminal device.
  • the elements contained in the set S may be different.
  • the terminal device further obtains the reference signal sequence by receiving second indication information.
  • the terminal device is assigned the X base sequences.
  • the terminal device determines a base sequence from the X base sequences to generate the reference signal sequence.
  • the parameter ⁇ used for generating the reference signal sequence from the base sequence may be further notified by the network device through other signaling.
  • the root index of the ZC sequence that generates the base sequence of the reference signal sequence is characterized by a first parameter and a second parameter, where the first parameter is based on the first indication information
  • the indicated sequence group identifier or cell identifier is determined, and the second parameter belongs to a set including only X elements, and is determined according to the second indication information.
  • the value of V can be determined according to the second indication information.
  • the second indication information indicates that, among the X base sequences of the first sequence group, the identifier of the base sequence of the reference signal sequence is generated, or the identifier of the root index of the ZC sequence of the base sequence is generated.
  • the pre-defined table described above defines the root index of the ZC sequence included in each sequence group to generate one or more base sequences of the sequence group, and the terminal device determines the X root indexes through the first indication information And determine the root index used to generate the reference signal sequence through the second indication information.
  • first indication information and the second indication information may be sent through the same instruction or through different instructions, which is not limited in this embodiment of the present application.
  • the terminal device obtains the reference signal sequence according to the first indication information and the second indication information.
  • the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the second indication information is used to indicate one of the X base sequences.
  • the root index q of the ZC sequence that generates the base sequence of the reference signal sequence satisfies the following formula:
  • B is an integer greater than 1, for example, B may be 31 or 71;
  • u is a natural number determined according to the group ID or cell ID of the first sequence group, for example, u is the group ID or location of the first sequence group The cell identifier of the first sequence group.
  • ⁇ is an integer determined according to the second indication information, or an integer determined according to the first indication information and the second indication information, Means round down.
  • the second indication information indicates a sequence identifier of a base sequence of the X base sequences of the first sequence group or an identifier of a root index of a ZC sequence that generates the base sequence, and the terminal device uses the sequence identifier Or the root index identification determines the parameter ⁇ , for example, the sequence identification from small to large corresponds to the value of the parameter ⁇ from small to large.
  • the second indication information indicates a value from the X values of the parameter V, X is greater than 1, and ⁇ has a predefined relationship with V.
  • the X values of V include 0.
  • ⁇ can be determined according to V by any of the following formulas:
  • f (u, N) is an integer determined according to u and N.
  • f(u,N) adopts other forms, which are not limited in the embodiments of the present application.
  • the root index q can satisfy any of the following formulas:
  • the root index q i of the ZC sequence of the i-th base sequence among the X base sequences satisfies at least one of the following:
  • B is an integer greater than 1
  • a i is an integer; where, when X is an integer greater than or equal to 2,
  • ⁇ 2, i 1, ..., X-1; or, when X is greater than or equal to 3 , An integer of
  • 1,
  • each element of set A is a possible value of the absolute value of V.
  • the first sequence group corresponds to the first root index group, and the number of root indexes of the ZC sequence used to generate the base sequence of length M in the first root index group is X.
  • the first index group may include root indexes of ZC sequences that generate base sequences of different lengths.
  • the L root index groups have different root index group IDs, or cell IDs.
  • the group identifier of the sequence group where each base sequence is located and the group identifier of the root indicator group where the root indicator corresponding to the base sequence is located are equivalent definitions.
  • the group identifier of the first sequence group may refer to the group identifier of the first sequence group in the at least two sequence groups, or may refer to any base sequence in the first sequence group The group ID of the corresponding root index in at least two root index groups.
  • the second indication information may be the sequence identifier of the base sequence generating the reference signal sequence in the first sequence group, or the root index corresponding to the base sequence generating the reference signal sequence in the first root index
  • the root index identifier in the group is used to obtain the base sequence for generating the reference signal sequence from the X base sequences in the first sequence group, or determine and generate the X root index from the first root index group
  • the root index of the ZC sequence of the base sequence of the reference signal sequence thereby determining the base sequence that generates the reference signal sequence.
  • the root indexes of the ZC sequences that generate the X base sequences may have different characteristics, which will be described separately below.
  • the first sequence group includes 2 sequences.
  • the value of V is V1
  • the length of the first ZC sequence is the same as the first
  • the value of V is V2
  • the absolute value of V1 is different from the absolute value of V2
  • N1 ⁇ N2 such that the absolute value of V1 ⁇ the absolute value of V2
  • N1 is the first length
  • N2 is the second length
  • the beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small.
  • the base sequences of different lengths for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.
  • the beneficial effect of this is that, among the base sequences of a larger length in the first sequence group, the interference between base sequences of the same length is small, which can cause the reference signal sequence of a longer length to be transmitted in the same cell
  • the sequence interference between multiple terminal devices is very small.
  • the value of V is V1
  • the length of the first ZC sequence and the length of the second ZC sequence are both the first length
  • the value of V is V2
  • the existence of the first length is greater than the second length, so that the absolute value of V1 is greater than the absolute value of V2, that is, there is N1>N2, such that the absolute value of V1>the absolute value of V2, N1 is the first length, and N2 is the second length.
  • the beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small.
  • the base sequences of different lengths for all base sequences of different lengths, if the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M (especially the larger M), the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small .
  • the value of V is V1
  • the value of V is V2
  • u1 exists Unlike u2, V1 is different from V2. That is, the value of V is related to the group identifier of the first sequence group.
  • the beneficial effect of this is that even for a large value of L, the root index of the ZC sequence that generates the base sequence of all sequence groups is not repeated, and at the same time, for each base sequence length M, each sequence in the L sequence groups
  • the number of base sequences of length M included is as much as possible, which helps to support more terminal devices in the same cell to send reference signal sequences on the same time-frequency resources and ensure that the inter-sequence interference is small.
  • the length N of a ZC sequence there may be K V values V 1 , V 2 ,..., V K , such that the generated based on the root index q 1 and (q 1 +V k ) mod N
  • K is an integer greater than 1
  • i, j, and k are integers greater than or equal to 1 and less than or equal to K, and i and j are not the same.
  • V V I Represents the absolute value of V, ie if V ⁇ 0, If V ⁇ 0, In this case, there may be a case when only either of them using the values V V I, L can not find a set of base sequences, each sequence group comprising meet two base sequence, and generates a set of basis sequence L
  • a certain V i is used to design the sequence of the group, and in other sequence groups, another V j is used to design the sequence of the group, which can cause the generation of the L group sequence.
  • the root index of the ZC sequence is not repeated, to avoid the interference of the reference signal sequence caused by the terminal equipment in the neighboring cell.
  • the value of V is V1
  • the value of V is V2 which satisfies Any u1 is not equal to u2, and V1 is the same as V2, that is, the value of V is independent of the group identifier of the first sequence group.
  • the value of V is V1
  • the value of V is V2
  • c1 exists Unlike c2, V1 is different from V2, that is, the value of V is related to the cell identifier of the first sequence group.
  • the following uses X base sequences in the first sequence group as an example for description, and other details will not be repeated.
  • the root index of the first ZC sequence that generates the first sequence is q
  • the second ZC sequence that generates the second sequence The root index of (q+V) mod N, then the absolute value of V Is an integer in set A1 or set A2 or set A3 or set A4, ie or The relationship between set A1 or set A2 or set A3 or set A4 and N satisfies at least one row in Table 2 below.
  • at least one formula may be used to determine the root index q 1 of the first ZC sequence and the root index q 2 of the second ZC sequence:
  • the beneficial effect of this is that the cross-correlation of sequences with different truncation lengths can be optimized to ensure that under the truncation length, the cross-correlation between the base sequences of the same sequence group is very low, that is, the inter-sequence interference is very low. Does not increase the interference between the base sequences of different sequence groups.
  • the network device may perform subsequent processing, such as channel estimation, based on the truncated sequence of the reference signal sequence to match the coherent bandwidth of the channel.
  • set A1 to set A4 may correspond to different truncation lengths, for example, set A1 corresponds to a cutoff length of 24, set A2 corresponds to a cutoff length of 30, set A3 corresponds to a cutoff length of 36, and set A4 corresponds to a cutoff length Is 72.
  • sets A1 to A4 may also correspond to other truncated lengths, which will not be repeated here.
  • the embodiments of the present application consider the truncation lengths commonly used in actual systems, such as 24, 30, 36, etc., to ensure that the base sequences located in the same sequence group still have very little inter-sequence interference under the truncation length used by the actual system, and at the same time Does not increase the intersequence interference of different sequence groups.
  • each sequence group includes two base sequences.
  • the N is 139.
  • V 4.
  • the relationship between the root index of the ZC sequence that generates two base sequences per group and the group identifier u may be as shown in Table 3-1.
  • each set of root indexes includes two root indexes, q 1 and q 2 , respectively.
  • the two root indexes in the i-th root index are the root indexes of the ZC sequence that generates the two base sequences of the i-th base sequence group.
  • u is the sequence group ID or the group ID of the root index group.
  • the group ID of the first sequence group may be the same as the group ID of the root index group corresponding to the base sequence in the first sequence group.
  • the relationship between the root index of the ZC sequence that generates two base sequences in each group and the group identifier u in the 30 groups of sequences may be as shown in Table 3-2.
  • the root index of the first ZC sequence of the first sequence is q
  • the second ZC sequence of the second sequence is generated
  • the root index of (q+V) mod N then the absolute value of V Is an integer in set A1 or set A2 or set A3, and the relationship between set A1 or set A2 or set A3 and N satisfies at least one row in Table 4 below.
  • the root index q 1 of the first ZC sequence and the root index q 2 of the second ZC sequence may be determined according to the following formula:
  • the beneficial effect of this implementation is that the cross-correlation of two truncated length sequences can be a joint optimization goal, and the V can be determined to better match the frequency selection characteristics of the channel.
  • the truncated lengths corresponding to the set S1 in Table 4 are 24 and 30, the truncated lengths corresponding to the set S2 are 30 and 36, and the truncated lengths corresponding to the set S3 are 36 and 72.
  • the number of set S1 is used as the value of V, which can ensure that under the two truncation lengths of 30 and 36, the truncation cross-correlation of the base sequence in the same sequence group is very small, and the sequence between different sequence groups is not increased. Interrelated.
  • the sets S1 to S3 may also correspond to other truncated lengths, which will not be repeated here.
  • the absolute value of V It is L1 or L2 or L3 or L4.
  • the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 5 below.
  • a value of N can be determined, which is determined according to Table 5
  • the root indexes q 1 and q 2 of the first ZC sequence and the second ZC sequence are determined by the following formula:
  • the values of L1, L2, L3, and L4 can be designed for different truncation lengths, for example, the truncation length corresponding to the range L1 is 24, the truncation length corresponding to the range L2 is 30, and the truncation length corresponding to the range L3 is Is 36, and the truncation length corresponding to the range L4 is 72.
  • the above is only an example, and L1 to L4 can also correspond to other truncated lengths, which will not be repeated here. The beneficial effects are as described above and will not be repeated here.
  • the absolute value of V The relationship with N satisfies at least one row in Table 6 below.
  • a value of N may be determined, and the value is determined according to Table 6. Then the root indexes q 1 and q 2 of the first ZC sequence and the second ZC sequence are determined by the following formula:
  • the network device may allocate two base sequences of the same length to a different terminal device at the same time in a sequence group, so that The number of reference signal sequences that can be allocated by the device is doubled. The number of reference signal sequences is increased without increasing interference between reference signal sequences, which improves the accuracy of channel estimation based on reference signals.
  • the two base sequences obtained according to the two ZC sequences are truncated.
  • the cross-correlation of the two base sequences obtained by the sequence at a truncation length of 30 is only 2.7dB, which greatly reduces the inter-sequence interference in the same sequence group and does not increase the inter-sequence interference of different sequence groups.
  • the method provided in the embodiment of the present application provides corresponding absolute values of V for different values of N, which can ensure that the cross-correlation of the base sequence is very low under various values of M.
  • each sequence group includes at least 3 sequences.
  • the following uses three sequences in each sequence group as an example for description.
  • V and W are integers.
  • the value of V is V1
  • the length of the first ZC sequence and the length of the second ZC sequence are both the first length
  • the value of V is V2
  • the absolute value of V1 is different from the absolute value of V2, namely There is N1 ⁇ N2, so that the absolute value of V1 ⁇ the absolute value of V2, N1 is the first length, and N2 is the second length.
  • the beneficial effect of this is that, for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small.
  • the absolute value of V will result in only a certain length M, the interference between the base sequences in the first sequence group is very small
  • the interference between the base sequences in the first sequence group is greater.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the interference between the reference signals of different cells.
  • the root index of the first ZC sequence is q
  • the root index of the second ZC sequence is (q+V) mod N
  • V absolute is greater than 3.
  • the beneficial effect of this is that, among the base sequences of a larger length in the first sequence group, the interference between base sequences of the same length is small, which can cause the reference signal sequence of a longer length to be transmitted in the same cell
  • the sequence interference between multiple terminal devices is very small.
  • the value of V is V1
  • the length of the first ZC sequence and the length of the second ZC sequence are both the first length
  • the value of V is V2
  • the existence of the first length is greater than the second length, so that the absolute value of V1 is greater than the absolute value of V2, that is, there is N1>N2, such that the absolute value of V1>the absolute value of V2, N1 is the first length, and N2 is the second length.
  • the beneficial effect of this is that for different base sequence lengths M, the inter-sequence interference of base sequences of the same length located in the first sequence group can be very small.
  • the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small Without increasing intersequence interference between different sequence groups.
  • the value of V is V1
  • the value of V is V2
  • u1 exists Unlike u2, V1 is different from V2, that is, the value of V is related to the group identifier of the first sequence group.
  • the beneficial effect of this is that even for a large value of L, the root index of the ZC sequence that generates the base sequence of all sequence groups is not repeated, and at the same time, for each base sequence length M, each sequence in the L sequence groups
  • the number of base sequences of length M included is as much as possible, which helps to support more terminal devices in the same cell to send reference signal sequences on the same time-frequency resources and ensure that the inter-sequence interference is small.
  • ⁇ V
  • K the number of a ZC sequence
  • the intersequence interference of the 2 base sequences of the first sequence group is sufficiently low, where K is an integer greater than 1, i, j and k are integers greater than or equal to 1 and less than or equal to K, and i and j are not the same, Represents the absolute value of Y.
  • each sequence group includes 2 base sequences, and the root of the Z group sequence of the L group base sequence is generated
  • a certain V i is used to design the sequence of the group, and in other sequence groups, another V j is used to design the sequence of the group, which can cause the generation of the L group sequence.
  • the root index of the ZC sequence is not repeated, to avoid the interference of the reference signal sequence caused by the terminal equipment in the neighboring cell.
  • the value of V is V1
  • the value of V is V2.
  • U1 is different from u2
  • V1 is the same as V2, that is, the value of V is independent of the group identifier of the first sequence group.
  • the value of V is V1
  • the value of V is V2
  • c1 exists Unlike c2, V1 is different from V2, that is, the value of V is related to the cell identifier of the first sequence group.
  • V, W, and N can have multiple association relationships, described in detail below.
  • the W is determined according to the V, or the V is determined according to the W.
  • the V and the W satisfy any one of the following formulas:
  • V and the W may be independently designed values, and there is no explicit direct relationship between them.
  • the absolute value of V (which is or ) Is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies at least one row in Table 7 below.
  • the root index of the first ZC sequence of q 1, q root index of the ZC sequence of the second 2, the third root index q of the ZC sequence according to the formula 3 (4 -1) or (4-2) determine:
  • W and V is:
  • the relationship between W and V can be either (4-3) or (4-4), and the root indexes of the first ZC sequence and the second ZC sequence obtained by using the two are the same.
  • the root index of the first ZC sequence of q 1, q root index of the ZC sequence of the second 2, the third root index q of the ZC sequence 3 according to the formula (4-5 ) Or (4-6) to determine:
  • i 1, 2, 3.
  • order v 3 0, then q 1 , q 2 , q 3 can be obtained.
  • V'and W' still meet the characteristics of V and W mentioned in step 102, that is, the absolute value of V'and the absolute value of W'are integers greater than or equal to K3 and less than or equal to N-K3, K3> 1.
  • the relationship between V′ and N can be obtained. Therefore, no matter which order of value of v i is used to determine q 1 , q 2 , and q 3 , the three sets of root indexes obtained are consistent, and the cross-correlation performance of the three base sequences of the same sequence group is also Consistent.
  • the beneficial effect of this implementation is that the cross-correlation of different truncation length sequences can be used as the optimization goal, and the V and W can be determined to more closely match the coherent bandwidth of the channel, ensuring that under typical channel coherent bandwidth, Increase the inter-sequence interference between different sequence groups, while ensuring that the inter-sequence interference within a sequence group is very low.
  • the sets S1 to S4 in Table 7 may correspond to different truncation lengths, for example, the truncation length corresponding to set S1 is 24, the truncation length corresponding to set S2 is 30, the truncation length corresponding to set S3 is 36, and the truncation length corresponding to set S4 is Is 72.
  • the sets S1 to S4 may also correspond to other truncated lengths, which will not be repeated here.
  • the absolute value of V It is L1 or L2 or L3 or L4, and the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 8 below.
  • the root index q 1 of the first ZC sequence, the root index q 2 of the second ZC sequence, and the root index q 3 of the third ZC sequence are based on the following Formula (5-1) or (5-2) determines:
  • the root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.
  • the root index of the first ZC sequence of q 1, q root index of the ZC sequence of the second 2, the third root index q of the ZC sequence 3 according to the formula (5-3 ) Or (5-4) determine:
  • the beneficial effect of this implementation is that the cross-correlation of different truncation length sequences can be used as the optimization goal, and the V and W can be determined to better match the coherent bandwidth of the channel and ensure that under a certain truncation length, the same
  • the cross-correlation between the base sequences of the sequence group is very low, that is, the interference between the sequences is very low, and at the same time, the interference between the base sequences of different sequence groups is not increased.
  • L1 to L4 in Table 8 may correspond to different truncation lengths.
  • L1 corresponds to a truncation length of 24
  • L2 corresponds to a truncation length of 30
  • L3 corresponds to a truncation length of 36
  • L4 corresponds to a truncation length of 72.
  • L1 to L4 can also correspond to other truncated lengths, which will not be repeated here.
  • the absolute value of V is set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the following Table 9 At least one line.
  • at least one formula may be used to determine the root index q 1 of the first ZC sequence and the root index q 2 of the second ZC sequence.
  • the root index q 3 of the third ZC sequence :
  • the root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.
  • the beneficial effect of this implementation is that the cross-correlation of sequences with different truncation lengths can be optimized to ensure that under the truncation length, the cross-correlation between the base sequences of the same sequence group is very low, that is, the inter-sequence interference is very low. At the same time, the interference between the base sequences of different sequence groups is not increased.
  • the sets S1 to S4 in Table 9 may correspond to different truncation lengths, for example, the cutoff length corresponding to set S1 is 24, the cutoff length corresponding to set S2 is 30, the cutoff length corresponding to set S3 is 36, and the cutoff length corresponding to set S4 is Is 72.
  • the sets S1 to S4 may also correspond to other truncated lengths, which will not be repeated here.
  • the absolute value of V is set S1 or S2 or S3, and the relationship between set S1 or S2 or S3 and N satisfies at least one row in Table 10 below.
  • the root index q 1 of the first ZC sequence, the root index q 2 of the second ZC sequence, and the root index q 3 of the third ZC sequence may be based on Determined by the following formula:
  • the root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.
  • the beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to ensure that the base sequence of the same sequence group under the two truncated lengths
  • the cross-correlation between them is very low, that is, the interference between sequences is very low, and at the same time, the interference between the base sequences of different sequence groups is not increased.
  • the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low.
  • Adopt the set S2 The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low.
  • Adopt the set S3 The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low.
  • the sets S1 to S3 may also correspond to other truncated lengths, which will not be repeated here.
  • the absolute value of V is X1 or X2 or X3 or X4, and the relationship between X1 or X2 or X3 or X4 and N satisfies at least one row in Table 11 below.
  • the root index q 1 of the first ZC sequence, the root index q 2 of the second ZC sequence, and the root index q 3 of the third ZC sequence may be based on Determined by the following formula:
  • the root indexes of the first ZC sequence and the second ZC sequence obtained using both are the same.
  • X1 to X4 in Table 11 may correspond to different truncation lengths.
  • X1 corresponds to a truncation length of 24
  • X2 corresponds to a truncation length of 30
  • X3 corresponds to a truncation length of 36
  • X4 corresponds to a truncation length of 72.
  • X1 to X4 can also correspond to other truncated lengths, which will not be repeated here.
  • N 571
  • the cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 can reach 14.2dB, which is equivalent to the introduction of 14.2dB intersequence interference, is unacceptable.
  • the absolute value of V is X1 or X2 or X3, and the relationship between X1 or X2 or X3 and N satisfies at least one row in Table 12 below.
  • the root index q 1 of the first ZC sequence, the root index q 2 of the second ZC sequence, and the root index q 3 of the third ZC sequence may be based on Determined by the following formula:
  • W and V is:
  • the beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel.
  • V can make the cross-correlation of sequences with two truncation lengths of 24 and 30 truncation lengths relatively low.
  • X2 The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low.
  • Use the X3 The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low.
  • X1 to X3 can also correspond to other truncated lengths, which will not be repeated here.
  • N 571
  • the maximum cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 is 14.2dB is equivalent to introducing 14.2dB of inter-sequence interference.
  • the maximum cross-correlation value at the truncation length 36 is 14.3dB, which is equivalent to introducing 14.3dB of inter-sequence interference, which is unacceptable.
  • the relationship between the absolute value of V and N satisfies at least one row in the following Table 13-1 or at least one row in the following Table 13-2.
  • the root index q 1 of the first ZC sequence, the root index q 2 of the second ZC sequence, and the root index q 3 of the third ZC sequence may be based on Determined by the following formula:
  • W and V is:
  • the beneficial effect of this implementation is that the cross-correlation of the two truncated length sequences of 30 and 36 can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel.
  • 30 and 36 are two commonly used truncation lengths, matching the channel-related bandwidth in most scenarios.
  • Other beneficial effects are as described above and will not be repeated here.
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N Meet at least one row in Table 14 below.
  • v 1 0
  • u is the group ID or cell ID of the first sequence group
  • W -V.
  • N S1 S2 S3 S4 113 17,12,6 12,6,23,17 6,23,12 28,12,23,6 139 6,33,12,24 24,12,15 3,24,12,6 15,28,33 167 7,29,4,20 29,20,31,18 4,23,9,31 2,36,18,15 191 8,33,20,26 33,23,20,14 5,33,11,42 47,35,14, 211 9,50,25,5 39,22,4 36,5,18,43 52,26,45,9 107 8,23,15 8,15,23 8,15 15,23,8, 239 10,57,21,6 41,49,9,25 6,41,29,33 59,3,51,11 283 12,49,67,7 49,21,42,69 8,69,7,39 4,70,16,61 311 13,74,54,59 23,76,54,27 76,53,32,46 4,17,9,77 359 15,63,86,68 62,31,86,78 10,37 5,59,26,67 3
  • the sets S1 to S4 in Table 14 may correspond to different truncation lengths, for example, the cutoff length corresponding to set S1 is 24, the cutoff length corresponding to set S2 is 30, the cutoff length corresponding to set S3 is 36, and the cutoff length corresponding to set S4 is Is 72.
  • the beneficial effects are as described above and will not be repeated here.
  • the absolute value of V is any integer in set S1 or set S2 or set S3, and the relationship between set S1 or set S2 or set S3 and N satisfies at least the following Table 15 One line.
  • v 1 0
  • u is the group ID or cell ID of the first sequence group
  • W -V.
  • the beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. For example, using the To determine V, the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Use the S2 The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Use the S3 The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is just an example, and S1 to S3 may also correspond to other truncated lengths, which will not be repeated here.
  • N 571
  • the maximum cross-correlation value of the three base sequences of a sequence group when the truncation length is 30 is 14.2dB, which is equivalent to the introduction of 14.2dB intersequence interference.
  • the maximum cross-correlation value at the truncation length 36 is 14.3dB, which is equivalent to the introduction of 14.3dB intersequence interference, which is unacceptable.
  • the absolute value of V is any integer of L1 or L2 or L3 or L4, and the relationship between L1 or L2 or L3 or L4 and N satisfies at least one row in Table 16 below.
  • the root index of the first ZC sequence of q 1 q root index of the ZC sequence of the second 2
  • the third root index q of the ZC sequence according to the formula 3 (b ) determine:
  • v 1 0
  • u is the group ID or cell ID of the first sequence group
  • W -V.
  • L1 to L4 in Table 16 may correspond to different truncation lengths.
  • L1 corresponds to a truncation length of 24
  • L2 corresponds to a truncation length of 30
  • L3 corresponds to a truncation length of 36
  • L4 corresponds to a truncation length of 72.
  • the absolute value of V is any integer in L1 or L2 or L3, and the relationship between L1 or L2 or L3 and N satisfies at least one row in Table 17 below.
  • the root index of the first ZC sequence of q 1 q root index of the ZC sequence of the second 2
  • the third root index q of the ZC sequence according to the formula 3 (b ) determine:
  • v 1 0
  • u is the group ID or cell ID of the first sequence group
  • W -V.
  • the beneficial effect of this implementation is that the cross-correlation of at least two truncated length sequences can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel. For example, using L1 To determine V, the cross-correlation of sequences with two truncation lengths of 24 and 30 can be made relatively low. Use the one in L2 The cross-correlation of sequences with two truncation lengths of 36 and 30 can be made relatively low. Use L3 The cross-correlation of sequences with two truncation lengths 36 and 72 can be made relatively low. Of course, the above is only an example, and L1 to L3 may also correspond to other truncated lengths, which will not be repeated here.
  • the relationship between the absolute value of V and N satisfies at least one row in Table 18-1, or at least one row in Table 18-2.
  • the root index of the first ZC sequence of q 1 q root index of the ZC sequence of the second 2
  • the third root index q of the ZC sequence according to the formula 3 (c ) determine:
  • v 1 0
  • u is the group ID or cell ID of the first sequence group
  • W -V.
  • the beneficial effect of this implementation is that the cross-correlation of the two truncated length sequences of 30 and 36 can be optimized, and the V and W can be determined to better match the frequency selection characteristics of the channel.
  • 30 and 36 are two commonly used truncation lengths, matching the channel-related bandwidth in most scenarios.
  • Other beneficial effects are as described above and will not be repeated here.
  • the network device may treat at least three sequences in the same sequence group.
  • the base sequence of length is allocated to different terminal devices at the same time, so that the number of terminal devices that can support the simultaneous transmission of the reference signal sequence in one cell becomes at least three times the original.
  • the root index of the ZC sequence that generates at least three base sequences of the same length in a sequence group is redesigned, it can be guaranteed that the cross-correlation of at least three base sequences in a sequence group is very low, and the interference between sequences Compared with the signal is much lower, the accuracy of channel estimation based on the reference signal sequence is improved. Examples of specific gains are as described above and will not be repeated here.
  • the method provided in the embodiments of the present application provides corresponding absolute values of V and W for different values of N, which can ensure that the cross-correlation of the base sequence is very low under various values of M.
  • N 571
  • FIG. 2 it is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device may be used to perform the actions of the terminal device in the foregoing method embodiments.
  • the terminal device 200 includes a processing unit 201 and a transceiver unit 202.
  • the processing unit 201 is used to generate a reference signal sequence of length M, where M is an integer greater than 1;
  • the reference signal sequence is generated by a base sequence of length M in the first sequence group allocated to the terminal device, the number of base sequences of length M in the first sequence group is X, and the X
  • the i-th base sequence in the base sequence is generated by a ZC sequence of length N and root index q i , q i is an integer from 1 to N-1, N is an integer greater than 1, when i When the values are different, the values of q i are different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences Is q, the root index of the second ZC sequence corresponding to the second sequence of any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and less than or equal to N-K1 Integer, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the
  • the transceiver unit 202 is configured to send the reference signal sequence.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the transceiver unit 202 is also used to:
  • the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the second indication information is used to indicate Describe one of the X base sequences
  • the processing unit 201 is configured to acquire the reference signal sequence according to the first indication information and the second indication information.
  • the cell identifier of the first sequence group is c1
  • the value of V is V1
  • the value of V is V1.
  • the cell identifier of the first sequence group is c2
  • the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
  • each sequence group includes the number of base sequences of length M There may be many, so that more terminal devices in the same cell support sending reference signal sequences on the same time-frequency resources, and ensure that the inter-sequence interference is small.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • FIG. 3 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the terminal device shown in FIG. 3 may be a hardware circuit implementation manner of the terminal device shown in FIG. 2.
  • FIG. 3 shows only the main components of the terminal device.
  • the terminal device 300 includes an application processor 301, a memory 302, a modem processor 303, an antenna 304, and a display screen 305.
  • the application processor 301 is mainly used to process communication protocols and communication data, and to control the entire terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the above method embodiments For example, sending a first request message to the first cell.
  • the memory 302 is mainly used to store software programs and data.
  • the modem processor 303 is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • the antenna 304 is mainly used to cooperate with the modem processor 303 to send and receive radio frequency signals in the form of electromagnetic waves.
  • the display screen 305 is mainly used to receive instructions input by the user and display images and data to the user.
  • the terminal device 300 may also include other components, such as a speaker, etc., which will not be repeated here.
  • the application processor 301 is used to generate a reference signal sequence of length M, where M is an integer greater than 1;
  • the reference signal sequence is generated by a base sequence of length M in the first sequence group allocated to the terminal device, the number of base sequences of length M in the first sequence group is X, and the X
  • the i-th base sequence in the base sequence is generated by a ZC sequence of length N and root index q i , q i is an integer from 1 to N-1, N is an integer greater than 1, when i When the values are different, the values of q i are different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences Is q, the root index of the second ZC sequence corresponding to the second sequence of any two base sequences is (q+V) mod N, and the absolute value of V is greater than or equal to K1 and less than or equal to N-K1 Integer, K1>1; or, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the
  • the modem processor 303 is configured to send the reference signal sequence.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the modem processor 303 is also used to:
  • the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the second indication information is used to indicate Describe one of the X base sequences
  • the application processor 301 is configured to obtain the reference signal sequence according to the first indication information and the second indication information.
  • the cell identifier of the first sequence group is c1
  • the value of V is V1
  • the value of V is V1.
  • the cell identifier of the first sequence group is c2
  • the value of V The value is V2, there are different c1 and c2, and V1 and V2 are different.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • the network device 400 includes: a sending unit 401 and a receiving unit 402.
  • the sending unit 401 is used to send configuration information, where the configuration information is used to configure a first sequence group, the number of base sequences of length M in the first sequence group is X, and the number of the X base sequences i base sequences are generated by a ZC sequence of length N and root index q i , q i is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different, q The value of i is different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, the arbitrary The root index of the second ZC sequence corresponding to the second sequence of the two base sequences is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1; Alternatively, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and the root
  • the receiving unit 402 is configured to receive a reference signal sequence, where the reference signal sequence is a base sequence in the first sequence group.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the sending unit 401 is further used to:
  • the network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.
  • the value of V when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the inter-sequence interference of base sequences of the same length in the first sequence group can be very small.
  • the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • FIG. 5 it is a schematic structural diagram of a network device according to an embodiment of this application.
  • the network device may be used to perform the actions of the network device in the foregoing method embodiments.
  • the network device shown in FIG. 5 may be a hardware circuit implementation of the network device shown in FIG. 4.
  • FIG. 5 shows only the main components of the communication device.
  • the communication device may be a network device, or a device in the network device, such as a chip or a chip system, wherein the chip system includes at least one chip, and the chip system may further include other circuit structures and/or Discrete devices.
  • the network device 500 includes a processor 501, a memory 502, a transceiver 503, an antenna 504, and the like.
  • the transceiver 503 is used to send configuration information, and the configuration information is used to configure a first sequence group, the number of base sequences of length M in the first sequence group is X, and the number of the X base sequences i base sequences are generated by a ZC sequence of length N and root index q i , q i is an integer from 1 to N-1, N is an integer greater than 1, when the value of i is different, q The value of i is different; where X is an integer greater than or equal to 2, the root index of the first ZC sequence corresponding to the first sequence of any two of the X base sequences is q, the arbitrary The root index of the second ZC sequence corresponding to the second sequence of the two base sequences is (q+V) mod N, the absolute value of V is an integer greater than or equal to K1 and less than or equal to N-K1, and K1>1; Alternatively, when X is an integer greater than or equal to 3, the root index of the first ZC sequence is q, and
  • the transceiver 503 is configured to receive a reference signal sequence, and the reference signal sequence is a base sequence in the first sequence group.
  • the i-th base sequence among the X base sequences satisfies the following formula:
  • the transceiver 503 is also used to:
  • the network device sends first indication information and second indication information; the first indication information is used to indicate the group identifier of the first sequence group or the cell identifier of the first sequence group, and the second indication information It is used to indicate one of the X base sequences.
  • the value of V when the group identifier of the first sequence group is u1, the value of V is V1, and when the group identifier of the first sequence group is u2, the value of V is V2 , There is a difference between u1 and u2, and V1 is different from V2; or, when the cell identifier of the first sequence group is c1, the value of V is V1, and the value of V is the first sequence group of V1 When the cell identifier of c2 is V2, the value of V is V2, and c1 and c2 are different, and V1 and V2 are different.
  • the value of V is V1
  • the length of the first ZC sequence is V2
  • the value of V is V2
  • the inter-sequence interference of base sequences of the same length in the first sequence group can be very small.
  • the absolute values of V all take the same value, it will result in only a few values of length M, the The interference between the base sequences is very small, and under other values of length M, the interference between the base sequences in the first sequence group is large.
  • the network device allocates the first sequence group to the terminal devices in the cell, the problem that the sequence interference between the terminal devices that send reference signal sequences of the same length is relatively large may occur. Therefore, under different base sequence lengths M, the absolute value of V has different values, which can make the sequence interference between multiple terminal devices transmitting any reference signal sequence of the same length in the same cell very small , While not increasing the intersequence interference of different sequence groups.
  • the absolute value of V is any integer in set A1 or set A2 or set A3 or set A4, and the relationship between set A1 or set A2 or set A3 or set A4 and N satisfies the table At least one line in 2.
  • the content of Table 2 is specifically described in the example section, and will not be repeated here.
  • V and W satisfy the following formula:
  • the absolute value of V is any integer in set S1 or set S2 or set S3 or set S4, and the relationship between set S1 or set S2 or set S3 or set S4 and N satisfies the table At least one line in 7.
  • the content of Table 7 is specifically described in the example section, and will not be repeated here.
  • the root index q i of the ZC sequence generating the i-th base sequence among the X base sequences satisfies at least one of the following formulas:
  • B is an integer greater than 1
  • u is an integer determined according to the group identifier of the first sequence group or the cell identifier of the first sequence group
  • the elements in X-1 ⁇ , a i is an integer
  • each element of the set A is various possible values of the absolute value of V.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer usable program code.
  • a computer usable storage media including but not limited to disk storage, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions
  • the device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de communication, le procédé consistant : à générer, par un dispositif terminal, une séquence de signaux de référence ayant une longueur de M, la séquence de signaux de référence étant générée par une séquence de base ayant la longueur de M dans un premier groupe de séquences attribué au dispositif terminal, le nombre de la séquence de base ayant la longueur de M dans le premier groupe de séquences étant X, l'i-ième séquence de base dans les X séquences de base est générée par une séquence ZC ayant une longueur de N et un indice racine de qi, lorsque X est un nombre entier supérieur ou égal à 2, l'indice racine d'une première séquence ZC correspondant à une première séquence de l'une quelconque des deux séquences de base des X séquences de bases est q, l'indice racine d'une deuxième séquence ZC correspondant à une deuxième séquence de l'une quelconque des deux séquences de base est (q+V)mod N, où une valeur absolue de V est un nombre entier supérieur ou égal à K1 et inférieur ou égal à N-K1, et K1>1 ; ou, lorsque X est supérieur ou égal à 3, l'indice racine de la première séquence ZC est q, l'indice racine de la deuxième séquence ZC est (q+V)mod N, l'indice racine d'une troisième séquence ZC générant une troisième séquence est (q+W)mod N, où la valeur absolue de V est 1, la valeur absolue de W est supérieure à K2 et inférieure à N-K2, ou la valeur absolue de V et la valeur absolue de W sont des nombres entiers supérieurs ou égaux à K3 et inférieurs ou égaux à N-K3, la troisième séquence étant une quelconque séquence de base des X séquences de base autres que la première séquence et la deuxième séquence ; et à transmettre, par le dispositif terminal. la séquence de signaux de référence.
PCT/CN2018/120412 2018-12-11 2018-12-11 Procédé et appareil de communication WO2020118536A1 (fr)

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Citations (3)

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CN101601250A (zh) * 2007-02-02 2009-12-09 Lg电子株式会社 利用分组生成参考信号序列的方法
WO2017123279A1 (fr) * 2016-01-15 2017-07-20 Intel IP Corporation Nœud b évolué (enb), équipement d'utilisateur (ue) et procédés de communication selon un décalage en fréquence de trame de canal
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WO2017123279A1 (fr) * 2016-01-15 2017-07-20 Intel IP Corporation Nœud b évolué (enb), équipement d'utilisateur (ue) et procédés de communication selon un décalage en fréquence de trame de canal
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