CN108173798B - Method and device in wireless communication - Google Patents
Method and device in wireless communication Download PDFInfo
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- CN108173798B CN108173798B CN201611118338.2A CN201611118338A CN108173798B CN 108173798 B CN108173798 B CN 108173798B CN 201611118338 A CN201611118338 A CN 201611118338A CN 108173798 B CN108173798 B CN 108173798B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2671—Time domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2672—Frequency domain
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Abstract
The invention discloses a method and a device in wireless communication. The user equipment receives a first wireless signal on a first time-frequency resource; first signaling is then received. Wherein the first radio signal is generated by a first sequence, the first sequence is one of a target sequence pair, the target sequence pair is one of X candidate sequence pairs, and each of the X candidate sequence pairs comprises two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal. The method disclosed by the invention can provide the indication information under the condition of not increasing the detection complexity of the synchronous signal.
Description
Technical Field
The present invention relates to a method and apparatus for synchronization signal transmission in a wireless communication system.
Background
In the future, the application scenes of the wireless communication system are more and more diversified, and different application scenes put different performance requirements on the system. In order to meet different performance requirements of various application scenarios, research on a New air interface technology (NR, New Radio) is decided in #72 global meetings of 3GPP (3rd Generation partnership project) RAN (Radio Access Network).
In a wireless communication system, a User Equipment (UE) needs to detect a base station and synchronize with the base station in time and frequency before subsequent operations can be performed. This signal detection and time and frequency synchronization is accomplished by the synchronization signal. Synchronization signals are generally divided into Primary Synchronization Signals (PSS) and Secondary Synchronization signals (Secondary Synchronization signals), which occupy different physical resources. According to different designs, the primary synchronization signal and the secondary synchronization signal can be used to indicate information such as cell id, trp (transmission Reception point) id, antenna port id, beam id, FDD/TDD division, subframe/radio frame timing, and the like, respectively or jointly.
Disclosure of Invention
In the Initial Cell Search (Initial Cell Search) process of the ue, the ue generally needs to detect signals and implement time and frequency synchronization through correlation (correlation), and due to lack of accurate timing and frequency information in the Initial Search process, the ue needs to perform multiple correlation operations based on different timing and frequency assumptions, which greatly increases complexity and cost of the ue.
Aiming at the problem of high complexity of synchronous signal detection, the invention provides a design scheme. By adopting the scheme of the invention, the candidate generation sequences of the main synchronization signal appear in pairs, and each pair of sequences are conjugate to each other in a complex number field, the use of the complex conjugate property can greatly reduce the complexity of the detection of the main synchronization signal, and by utilizing the complex conjugate property, the main synchronization signal can be generated by adopting different sequences to carry important system information. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
The invention discloses a method used in synchronous UE, which comprises the following steps:
-a. receiving a first wireless signal on a first time-frequency resource;
-step b.
Wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
As an embodiment, without increasing the complexity of detecting the synchronization signal (the first radio signal), the property of complex conjugate is used to provide paired sequence configuration selection, so that the configuration of the complex conjugate sequence can be used to provide the most basic information when initially accessing the system, and the requirements of low complexity and low signaling overhead are met.
As an example, said X is equal to 1.
As an example, said X is equal to 3.
As an embodiment, X is equal to a positive integer other than 1, 3.
In one embodiment, the first sequence is a Zadoff-Chu sequence.
In one embodiment, the first sequence is a length 63 Zadoff-Chu sequence.
As an example, each sequence of the X candidate sequence pairs is a Zadoff-Chu sequence.
As an example, each of the X candidate sequence pairs is a Zadoff-Chu sequence of the same length.
As an embodiment, each sequence in the X candidate sequence pairs is a Zadoff-Chu sequence of the same length, and Root indices (Root indexes) of any two sequences in the X candidate sequence pairs are different.
As an example, each sequence of the X candidate sequence pairs is a Zadoff-Chu sequence of length Z, and the sum of the root factors of the two sequences in each of the X candidate sequence pairs is equal to Z.
As an embodiment, the first radio signal is obtained by the first sequence sequentially passing through a layer Mapper (L a layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and a baseband signal Generation (Generation).
As an example, the first radio signal is SCH (Synchronization Channel).
As one embodiment, the first wireless Signal is a PSS (Primary Synchronization Signal).
As an embodiment, the first time-frequency resource includes only one multicarrier symbol in time domain, and the multicarrier symbol includes a data symbol and a CP (Cyclic Prefix).
As an embodiment, the first time-frequency resource comprises two or more multicarrier symbols in the time domain.
As one embodiment, the first time-frequency resource includes a positive integer number of continuous subcarriers in a frequency domain.
As an embodiment, the first radio signal is used by the UE (user equipment) to determine at least one of { the location of the first time-frequency resource in the time domain, the location of the first time-frequency resource in the frequency domain }.
As an embodiment, the position of the first time-frequency resource in the time domain refers to a Slot (Slot) boundary time to which the first time-frequency resource belongs.
As an embodiment, the position of the first time-frequency resource in the time domain refers to a Subframe (Subframe) boundary time point to which the first time-frequency resource belongs.
As an embodiment, the position of the first time-frequency resource in the time domain refers to a Radio Frame (Radio Frame) boundary time to which the first time-frequency resource belongs.
As an embodiment, the position of the first time-frequency resource in the time domain refers to a multicarrier symbol boundary time included in the first time-frequency resource.
As an embodiment, the position of the first time frequency resource in the time domain refers to a starting time of the first time frequency resource in the time domain.
As an embodiment, the position of the first time frequency resource in the time domain refers to an end time of the first time frequency resource in the time domain.
As an embodiment, the position of the first time-frequency resource in the time domain refers to a starting time of a multicarrier symbol in the first time-frequency resource.
As an embodiment, the position of the first time-frequency resource in the time domain refers to an end time of a multicarrier symbol in the first time-frequency resource.
As an embodiment, the position of the first time-frequency resource in the frequency domain refers to an absolute frequency of a subcarrier included in the first time-frequency resource.
As an embodiment, the position of the first time-frequency resource in the frequency domain refers to a position of a subcarrier included in the first time-frequency resource in a Carrier (Carrier) to which the subcarrier belongs.
As an embodiment, the position of the first time-Frequency resource in the Frequency domain refers to a position of a subcarrier included in the first time-Frequency resource in a Frequency Band (Frequency Band) to which the subcarrier belongs.
As an embodiment, the first signaling is used by the UE (user equipment) to determine the first feature ID.
As an embodiment, the first signaling is transmitted by a wireless signal other than the first wireless signal.
As an embodiment, the first signaling is transmitted by the first wireless signal.
As an embodiment, the first signaling indicates part or all of information of the first feature ID.
As an embodiment, the first signaling is physical layer signaling.
As an embodiment, the first signaling is higher layer signaling.
As an embodiment, the feature ID is carried by a wireless signal other than the first wireless signal.
As an embodiment, part of the information of the feature ID is carried by the first wireless signal.
As an embodiment, the sender of the first wireless signal is a network side device composed of one or more TRPs (Transmission Reception points).
As one embodiment, the feature ID is a Cell (Cell) ID.
As an embodiment, the feature ID is a PCID (Physical Cell ID).
As one embodiment, the characteristic ID is a transmission Beam (Beam) ID corresponding to the first wireless signal.
Specifically, according to an aspect of the present invention, the method is characterized in that the step B further includes the steps of:
-step b1. receiving a second radio signal on a second time-frequency resource.
Wherein the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
As an embodiment, the second wireless signal is SSS (Secondary synchronization signal).
As an embodiment, the transmission Channel corresponding to the second wireless signal is BCH (Broadcast Channel).
As an embodiment, the second wireless signal is a PBCH (Physical Broadcast Channel).
As an embodiment, two time frequency resources are orthogonal, which means that there is no one RU belonging to the two time frequency resources.
As an embodiment, the second time-frequency resource includes a positive integer number of the RUs.
As an embodiment, the second time-frequency resource includes only one multicarrier symbol in time domain, and the multicarrier symbol includes a data symbol and a CP (Cyclic Prefix).
As an embodiment, the second time-frequency resource comprises two or more multicarrier symbols in the time domain.
As an embodiment, the second time-frequency resource includes a positive integer number of continuous subcarriers in a frequency domain.
As an embodiment, the position of the first sequence in the target sequence pair is used by the UE (user equipment) to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }.
As an embodiment, the position of the first sequence in the target sequence pair indicates one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmission antenna port group of the second wireless signal }.
As an embodiment, the position of the first sequence in the target sequence pair refers to an index of a root factor corresponding to the target sequence, where the sequences in the target sequence pair are sorted according to the size of the root factor.
As an embodiment, the subcarrier spacing of any two RUs in the second time-frequency resource is the same.
In one embodiment, the second sequence is one of { Zadoff-Chu sequence, pseudo-random sequence }.
As one example, the second sequence is an m-sequence.
As an embodiment, the second wireless signal is obtained by the second sequence sequentially passing through a layer Mapper (L a layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and a baseband signal Generation (Generation).
As an embodiment, the first bit block comprises an output of a code block after channel coding. As a sub embodiment, the code Block is a TB (Transport Block). As a sub embodiment, the code Block is a part of a Transport Block (TB).
As an embodiment, the first bit block sequentially passes through a Modulation Mapper (Modulation Mapper), a layer Mapper (L a layer Mapper), a Precoding (Precoding), a Resource element Mapper (Resource element Mapper), and an OFDM signal Generation (Generation) to obtain the second wireless signal.
As an embodiment, the antenna port is formed by superimposing a plurality of physical antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of physical antennas to the antenna port form an antenna Virtualization vector for the antenna Virtualization. As a sub-embodiment, the beamforming vectors corresponding to any two different antenna ports cannot be assumed to be the same.
As an example, the small scale characteristics of the wireless channel experienced by a signal transmitted by one antenna port cannot be used to infer the small scale characteristics of the wireless channel experienced by a signal transmitted by another antenna port.
As an example, one antenna port is associated with one reference signal.
As an embodiment, the set of transmit antenna ports of the second wireless signal includes one transmit antenna port.
As an example, one antenna port corresponds to one Analog Beam (Analog Beam).
Specifically, according to an aspect of the present invention, the method is characterized in that the transmission antenna port group of the second wireless signal is the same as the transmission antenna port group of the first wireless signal.
Specifically, according to an aspect of the present invention, the method is characterized in that the relative position relationship between the second time-frequency resource and the first time-frequency resource in the time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and the position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
As an embodiment, the first type of relationship is FDM (Frequency Division Multiplexing).
As an embodiment, the first type of relationship is TDM (Time Division Multiplexing).
As an embodiment, the first type of relationship is that the ending time of the second time-frequency resource in the time domain is separated from the starting time of the first time-frequency resource in the time domain by a positive integer number of the first CP length and a non-negative integer number of the data symbol length. As a sub-embodiment, the first CP length is a Normal CP length (Normal CP).
As an embodiment, the first type of relationship is that the ending time of the second time frequency resource in the time domain is separated from the starting time of the first time frequency resource in the time domain by a positive integer of a second CP length and a non-negative integer of a data symbol length, and the second CP length is different from the first CP length. As a sub-embodiment, the second CP length is an Extended CP length (Extended CP).
Specifically, according to an aspect of the present invention, the method is characterized in that the X candidate sequence pairs correspond to X feature ID groups one by one, each of the X feature ID groups includes a positive integer number of feature IDs, and the first signaling indicates the first feature ID group in the X feature ID groups, where the first feature ID group includes the first feature ID.
As one embodiment, the X is equal to 1, and each of the X feature ID groups contains 504 feature IDs.
As one embodiment, the X is equal to 3, and each of the X feature ID groups contains 168 feature IDs.
The invention discloses a method used in a synchronous base station, which comprises the following steps:
-step a. transmitting a first wireless signal on a first time-frequency resource;
-step b.
Wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
Specifically, according to an aspect of the present invention, the method is characterized in that the step B further includes the steps of:
-step b1. transmitting a second radio signal on a second time-frequency resource.
Wherein the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
Specifically, according to an aspect of the present invention, the method is characterized in that the transmission antenna port group of the second wireless signal is the same as the transmission antenna port group of the first wireless signal.
Specifically, according to an aspect of the present invention, the method is characterized in that the relative position relationship between the second time-frequency resource and the first time-frequency resource in the time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and the position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
Specifically, according to an aspect of the present invention, the method is characterized in that the X candidate sequence pairs correspond to X feature ID groups one by one, each of the X feature ID groups includes a positive integer number of feature IDs, and the first signaling indicates the first feature ID group in the X feature ID groups, where the first feature ID group includes the first feature ID.
The invention discloses user equipment used for synchronization, which comprises the following modules:
-a first receiving module: for receiving a first wireless signal on a first time-frequency resource;
-a second receiving module: for receiving the first signaling.
Wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
In particular, according to an aspect of the present invention, the ue is characterized in that the second receiving module is further configured to receive a second wireless signal on a second time-frequency resource. The position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
Specifically, according to an aspect of the present invention, the user equipment is characterized in that the transmission antenna port group of the second radio signal is the same as the transmission antenna port group of the first radio signal.
Specifically, according to an aspect of the present invention, the ue is characterized in that a relative position relationship between the second time-frequency resource and the first time-frequency resource in a time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and a position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
Specifically, according to an aspect of the present invention, the above-mentioned ue is characterized in that the X candidate sequence pairs correspond to X feature ID groups one by one, each of the X feature ID groups includes a positive integer number of feature IDs, and the first signaling indicates the first feature ID group in the X feature ID groups, where the first feature ID group includes the first feature ID.
The invention discloses a base station device used for synchronization, which comprises the following modules:
-a first sending module: for transmitting a first wireless signal on a first time-frequency resource;
-a second sending module: for transmitting the first signaling.
Wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
Specifically, according to an aspect of the present invention, the base station device is characterized in that the second sending module is further configured to send a second wireless signal on a second time-frequency resource. The position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
Specifically, according to an aspect of the present invention, the base station apparatus is characterized in that the transmission antenna port group of the second radio signal is the same as the transmission antenna port group of the first radio signal.
Specifically, according to an aspect of the present invention, the base station device is characterized in that a relative position relationship between the second time-frequency resource and the first time-frequency resource in a time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and a position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
Specifically, according to an aspect of the present invention, the base station apparatus is characterized in that the X candidate sequence pairs correspond to X feature ID groups one by one, each of the X feature ID groups includes a positive integer number of feature IDs, the first signaling indicates the first feature ID group in the X feature ID groups, and the first feature ID group includes the first feature ID group
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of a wireless signal downlink transmission according to an embodiment of the invention;
FIG. 2 shows a first sequence diagram according to an embodiment of the invention;
FIG. 3 is a diagram illustrating a relationship between a first time-frequency resource and a second time-frequency resource according to an embodiment of the invention;
FIG. 4 is a diagram illustrating a relationship between a first wireless signal and a second wireless signal according to one embodiment of the invention;
FIG. 5 shows a block diagram of a processing device in a User Equipment (UE) according to an embodiment of the invention;
fig. 6 shows a block diagram of a processing means in a base station apparatus according to an embodiment of the present invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
Embodiment 1 illustrates a flow chart of downlink transmission of a wireless signal, as shown in fig. 1. In fig. 1, base station N1 is a serving cell maintaining base station for UE U2.
For theBase station N1The first wireless signal is transmitted on the first time-frequency resource in step S11, the first signaling is transmitted in step S12, and the second wireless signal is transmitted on the second time-frequency resource in step S13.
For theUE U2In step S21, a first wireless signal is received on a first time-frequency resource, in step S22, a second wireless signal is received on a second time-frequency resource, in step S23.
In embodiment 1, the first radio signal is generated from a first sequence, the first sequence is one complex sequence of a target sequence pair, the target sequence pair is one candidate sequence pair of X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal. The position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
In sub-embodiment 1 of embodiment 1, the first radio signal is obtained after the first sequence sequentially passes through a layer Mapper (L a Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and a baseband signal Generation (Generation).
In sub-embodiment 2 of embodiment 1, the first wireless signal is a PSS (Primary synchronization signal).
In sub-embodiment 3 of embodiment 1, a position of the first time/frequency resource in a time domain refers to a time of a Slot (Slot) boundary to which the first time/frequency resource belongs.
In sub-embodiment 4 of embodiment 1, the position of the first time/frequency resource in the time domain refers to a Subframe (Subframe) boundary time to which the first time/frequency resource belongs.
In sub-embodiment 5 of embodiment 1, the position of the first time-frequency resource in the time domain refers to a Radio Frame (Radio Frame) boundary time to which the first time-frequency resource belongs.
In sub-embodiment 6 of embodiment 1, a position of the first time/frequency resource in a time domain refers to a multicarrier symbol boundary time included in the first time/frequency resource.
In sub-embodiment 7 of embodiment 1, a position of the first time/frequency resource in a frequency domain refers to an absolute frequency of a subcarrier included in the first time/frequency resource.
In sub-embodiment 8 of embodiment 1, the position of the first time-frequency resource in the frequency domain refers to a position of a subcarrier included in the first time-frequency resource in a Carrier (Carrier) to which the subcarrier belongs.
In sub-embodiment 9 of embodiment 1, the position of the first time-Frequency resource in the Frequency domain refers to a position of a Frequency Band (Frequency Band) to which a subcarrier included in the first time-Frequency resource belongs.
In sub-embodiment 10 of embodiment 1, the first signaling is transmitted by a wireless signal other than the first wireless signal.
In a sub-embodiment 11 of embodiment 1, the first signaling indicates part or all of information of the first feature ID.
In a sub-embodiment 12 of embodiment 1, the feature ID is carried by a wireless signal other than the first wireless signal.
In sub-embodiment 13 of embodiment 1, a sender of the first wireless signal is a network side device composed of one or more TRPs (Transmission Reception points).
In sub-embodiment 14 of embodiment 1, the feature ID is a Cell (Cell) ID.
In a sub-embodiment 15 of embodiment 1, the characteristic ID is a transmission Beam (Beam) ID corresponding to the first wireless signal.
Example 2
Embodiment 2 illustrates a first sequence diagram, as shown in fig. 2. In fig. 2, the horizontal axis represents the index of the sequence, each vertical line represents a sequence, two vertical lines with the same line end represent that the two sequences are in complex conjugate relation with each other, and two complex conjugate sequences enclosed by the dashed frame are the target sequence pair.
In embodiment 2, the first radio signal is generated from a first sequence, the first sequence being one complex sequence of a target sequence pair, the target sequence pair being one candidate sequence pair of X candidate sequence pairs, X being a positive integer, each of the X candidate sequence pairs comprising two complex sequences that are conjugate to each other.
In sub-embodiment 1 of embodiment 2, the first sequence is a Zadoff-Chu sequence.
In sub-embodiment 2 of embodiment 2, the first sequence is a length-63 Zadoff-Chu sequence.
In sub-embodiment 3 of embodiment 2, said X is equal to 1.
In sub-embodiment 4 of embodiment 2, said X is equal to 3.
In sub-embodiment 5 of embodiment 2, each of the X candidate sequence pairs is a Zadoff-Chu sequence.
In sub-embodiment 6 of embodiment 2, each of the X candidate sequence pairs is a Zadoff-Chu sequence of the same length.
In sub-embodiment 7 of embodiment 2, each of the X candidate sequence pairs is a Zadoff-Chu sequence of the same length, and any two sequences in the X candidate sequence pairs have different Root indices (Root indexes).
In a sub-embodiment 8 of embodiment 2, the terminal device detects the target sequence pair and the first sequence in the X candidate sequence pairs by blind detection.
In sub-embodiment 9 of embodiment 2, the X candidate sequence pairs correspond to X feature ID groups one to one, and each of the X feature ID groups contains a positive integer number of feature IDs.
Example 3
Embodiment 3 illustrates a relationship diagram of a first time-frequency resource and a second time-frequency resource, as shown in fig. 3. In fig. 3, the horizontal axis represents time, the vertical axis represents frequency, the diagonally filled rectangles represent first time-frequency resources, the unfilled rectangles represent second time-frequency resources, and the unfilled rectangles in the dashed box represent possible second time-frequency resources.
In embodiment 3, the first time-frequency resource and the second time-frequency resource are orthogonal, and a relative position relationship between the second time-frequency resource and the first time-frequency resource in a time-frequency domain belongs to a first-class relationship, where the first-class relationship is one of two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of a multicarrier symbol in the second time-frequency resource }.
In sub-embodiment 1 of embodiment 3, that two time-frequency resources are orthogonal means that there is no one RU belonging to the two time-frequency resources, and the RU occupies one subcarrier in the frequency domain and occupies the duration of one multicarrier symbol in the time domain.
In sub-embodiment 2 of embodiment 3, the first time-frequency resource includes only one multicarrier symbol in the time domain, and the multicarrier symbol includes a data symbol and a CP (Cyclic Prefix).
In a sub-embodiment 3 of embodiment 3, the first time-frequency resource comprises two or more multicarrier symbols in the time domain.
In sub-embodiment 4 of embodiment 3, the first time-frequency resource includes a positive integer number of consecutive subcarriers in the frequency domain.
In sub-embodiment 5 of embodiment 3, the second time-frequency resource includes a positive integer number of the RUs.
In sub-embodiment 6 of embodiment 3, the second time-frequency resource includes only one multicarrier symbol in time domain, and the multicarrier symbol includes a data symbol and a CP (Cyclic Prefix).
In sub-embodiment 7 of embodiment 3, the first type of relationship is FDM (Frequency division multiplexing).
In a sub-embodiment 8 of embodiment 3, said first type of relationship is TDM (Time division multiplexing).
In sub-embodiment 9 of embodiment 3, the first type of relationship is that the ending time of the second time-frequency resource in the time domain is separated from the starting time of the first time-frequency resource in the time domain by a positive integer of the first CP length and a non-negative integer of the data symbol length. As a sub-embodiment, the first CP length is a Normal CP length (Normal CP).
In a sub-embodiment 10 of embodiment 3, the first type of relationship is that an ending time of the second time-frequency resource in the time domain is separated from a starting time of the first time-frequency resource in the time domain by a positive integer of a second CP length and a non-negative integer of a data symbol length, and the second CP length is different from the first CP length. As a sub-embodiment, the second CP length is an Extended CP length (Extended CP).
Example 4
Embodiment 4 illustrates a relationship diagram of a first wireless signal and a second wireless signal, as shown in fig. 4. In fig. 4, the horizontal axis represents time, each petal represents an antenna port group, the petals filled at the transmitting end represent the transmitting antenna port group in the corresponding time period, each filled large rectangle represents a signal transmitted in the corresponding time period, the small rectangles filled with oblique lines represent first wireless signals, and the small rectangles filled with cross lines represent second wireless signals.
In embodiment 4, the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the second radio signal occupies a second time-frequency resource, and a position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of an RU in the second time-frequency resource, a transmit antenna port group of the second radio signal }. The RU occupies one subcarrier in a frequency domain and occupies a duration of one multicarrier symbol in a time domain, and the transmit antenna port group includes a positive integer number of transmit antenna ports. The set of transmit antenna ports for the second wireless signal is the same as the set of transmit antenna ports for the first wireless signal.
In sub-embodiment 1 of embodiment 4, the first radio signal is obtained after the first sequence sequentially passes through a layer Mapper (L a Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and a baseband signal Generation (Generation).
In sub-embodiment 2 of embodiment 4, the second wireless signal is obtained after the second sequence sequentially passes through a layer Mapper (L a Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and a baseband signal Generation (Generation).
In sub-embodiment 3 of embodiment 4, the second radio signal is generated by a first bit block comprising the output of one code block after channel coding. As a sub embodiment, the code block is a TB (transport block). As a sub embodiment, the code Block is a part of a Transport Block (TB).
In a sub-embodiment 4 of the embodiment 4, the second wireless signal is generated by a first bit block, and the first bit block sequentially passes through a Modulation Mapper (Modulation Mapper), a layer Mapper (L layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation) to obtain the second wireless signal.
In sub-embodiment 5 of embodiment 4, the antenna port is formed by superimposing a plurality of physical antennas through antenna Virtualization (Virtualization), and mapping coefficients of the plurality of physical antennas to the antenna port form an antenna Virtualization vector for the antenna Virtualization. As a sub-embodiment, the beamforming vectors corresponding to any two different antenna ports cannot be assumed to be the same.
In sub-embodiment 6 of embodiment 4, the small scale characteristics of the wireless channel experienced by a signal transmitted by one antenna port cannot be used to infer the small scale characteristics of the wireless channel experienced by a signal transmitted by another antenna port.
In sub-embodiment 7 of embodiment 4, the group of transmit antenna ports for the second wireless signal includes one transmit antenna port.
In a sub-embodiment 8 of embodiment 4, one antenna port corresponds to one Analog Beam (Analog Beam).
Example 5
Embodiment 5 illustrates a block diagram of a processing device in a User Equipment (UE), as shown in fig. 5. In fig. 5, the ue processing apparatus 100 is mainly composed of a first receiving module 101 and a second receiving module 102.
In embodiment 5, the first receiving module 101 is used to receive a first wireless signal on a first time-frequency resource, and the second receiving module 102 is used to receive a first signaling. The first radio signal is generated by a first sequence, the first sequence is a complex sequence in a target sequence pair, the target sequence pair is a candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal. The second receiving module 102 is further configured to receive a second wireless signal on a second time-frequency resource.
In sub-embodiment 1 of embodiment 5, the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, the subcarrier spacing of RUs in the second time-frequency resource, the transmit antenna port group for the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
In sub-embodiment 2 of embodiment 5, the set of transmit antenna ports for the second wireless signal is the same as the set of transmit antenna ports for the first wireless signal.
In sub-embodiment 3 of embodiment 5, a relative position relationship between the second time-frequency resource and the first time-frequency resource in a time-frequency domain belongs to a first-class relationship, where the first-class relationship is one of two types of relative position relationships, and a position of the first sequence in the target sequence pair indicates the first-class relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
In sub-embodiment 4 of embodiment 5, the X candidate sequence pairs correspond to X feature ID groups one to one, each of the X feature ID groups contains a positive integer number of feature IDs, and the first signaling indicates the first feature ID group among the X feature ID groups, the first feature ID group including the first feature ID.
Example 6
Embodiment 6 is a block diagram illustrating a processing apparatus in a base station device, as shown in fig. 6. In fig. 6, the base station device processing apparatus 200 is mainly composed of a first sending module 201 and a second sending module 202.
In embodiment 6, the first transmitting module 201 is used to transmit the first wireless signal on the first time-frequency resource, and the second transmitting module 202 is used to transmit the first signaling. The first radio signal is generated by a first sequence, the first sequence is a complex sequence in a target sequence pair, the target sequence pair is a candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs includes two complex sequences that are conjugate to each other. The first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }. The first wireless signal is broadcast; or the first wireless signal is multicast. The first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal. The second transmitting module 202 is further configured to transmit a second wireless signal on a second time-frequency resource.
In sub-embodiment 1 of embodiment 6, the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, the subcarrier spacing of RUs in the second time-frequency resource, the transmit antenna port group for the second wireless signal }. The first time frequency resource and the second time frequency resource are orthogonal, the RU occupies one subcarrier in a frequency domain and occupies the duration of one multicarrier symbol in a time domain. The second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block. The second sequence is a sequence other than the X candidate sequence pairs, and the first bit block includes a positive integer number of bits. The transmit antenna port group includes a positive integer number of transmit antenna ports.
In sub-embodiment 2 of embodiment 6, the set of transmit antenna ports for the second wireless signal is the same as the set of transmit antenna ports for the first wireless signal.
In sub-embodiment 3 of embodiment 6, a relative position relationship between the second time-frequency resource and the first time-frequency resource in a time-frequency domain belongs to a first-class relationship, where the first-class relationship is one of two types of relative position relationships, and a position of the first sequence in the target sequence pair indicates the first-class relationship of the two types of relative position relationships. For a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
In sub-embodiment 4 of embodiment 6, the X candidate sequence pairs correspond to X feature ID groups one to one, each of the X feature ID groups contains a positive integer number of feature IDs, and the first signaling indicates the first feature ID group among the X feature ID groups, the first feature ID group including the first feature ID.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE or the terminal in the invention includes but is not limited to wireless communication equipment such as a mobile phone, a tablet computer, a notebook computer, a network card, low-power consumption equipment, NB-IoT equipment, vehicle-mounted communication equipment and the like. The base station or network side device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (14)
1. A method in a UE used for synchronization, comprising the steps of:
-a. receiving a first wireless signal on a first time-frequency resource;
-step b. receiving a first signalling;
wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs comprises two complex sequences conjugated to each other; the first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }; the first wireless signal is broadcast; or the first wireless signal is multicast; the first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
2. The method of claim 1, wherein step B further comprises the steps of:
-step b1. receiving a second radio signal on a second time-frequency resource;
wherein the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }; the first time frequency resource and the second time frequency resource are orthogonal, the RU occupies a subcarrier in a frequency domain and occupies the duration of a multicarrier symbol in a time domain; the second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block; the second sequence is a sequence other than the X candidate sequence pairs, and the first bit block comprises a positive integer number of bits; the transmit antenna port group includes a positive integer number of transmit antenna ports.
3. The method of claim 2, wherein the set of transmit antenna ports for the second wireless signal is the same as the set of transmit antenna ports for the first wireless signal.
4. The method according to claim 2 or 3, wherein the relative position relationship between the second time-frequency resource and the first time-frequency resource in the time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and the position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships; for a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
5. The method according to any of claims 1 to 3, wherein the X candidate sequence pairs correspond to X feature ID groups one-to-one, each of the X feature ID groups contains a positive integer number of feature IDs, and the first signaling indicates the first feature ID group among the X feature ID groups, the first feature ID group comprising the first feature ID.
6. A method in a base station used for synchronization, comprising the steps of:
-step a. transmitting a first wireless signal on a first time-frequency resource;
-step b. sending a first signalling;
wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs comprises two complex sequences conjugated to each other; the first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }; the first wireless signal is broadcast; or the first wireless signal is multicast; the first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
7. The method of claim 6, wherein step B further comprises the steps of:
-step b1. transmitting a second radio signal on a second time-frequency resource;
wherein the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }; the first time frequency resource and the second time frequency resource are orthogonal, the RU occupies a subcarrier in a frequency domain and occupies the duration of a multicarrier symbol in a time domain; the second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block; the second sequence is a sequence other than the X candidate sequence pairs, and the first bit block comprises a positive integer number of bits; the transmit antenna port group includes a positive integer number of transmit antenna ports.
8. The method of claim 7, wherein the set of transmit antenna ports for the second wireless signal is the same as the set of transmit antenna ports for the first wireless signal.
9. The method according to claim 7 or 8, wherein the relative position relationship between the second time-frequency resource and the first time-frequency resource in the time-frequency domain belongs to a first type of relationship, the first type of relationship is one of two types of relative position relationships, and the position of the first sequence in the target sequence pair indicates the first type of relationship of the two types of relative position relationships; for a given one of the two types of relative position relationship, the relative position of the second time-frequency resource and the first time-frequency resource in the time-frequency domain is fixed; or the second time-frequency resource is related to at least one of the relative position of the first time-frequency resource in the time-frequency domain and { the position of the first time-frequency resource in the frequency domain, the time length of the multicarrier symbol of the RU }.
10. The method according to any of claims 6 to 8, wherein the X candidate sequence pairs correspond to X feature ID groups one-to-one, each of the X feature ID groups contains a positive integer number of feature IDs, and the first signaling indicates the first feature ID group among the X feature ID groups, the first feature ID group comprising the first feature ID.
11. A user equipment used for synchronization, comprising:
-a first receiving module: for receiving a first wireless signal on a first time-frequency resource;
-a second receiving module: for receiving a first signaling;
wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs comprises two complex sequences conjugated to each other; the first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }; the first wireless signal is broadcast; or the first wireless signal is multicast; the first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
12. The UE of claim 11, wherein the second receiving module is further configured to receive a second wireless signal on a second time-frequency resource; the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }; the first time frequency resource and the second time frequency resource are orthogonal, the RU occupies a subcarrier in a frequency domain and occupies the duration of a multicarrier symbol in a time domain; the second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block; the second sequence is a sequence other than the X candidate sequence pairs, and the first bit block comprises a positive integer number of bits; the transmit antenna port group includes a positive integer number of transmit antenna ports.
13. A base station device used for synchronization, comprising:
-a first sending module: for transmitting a first wireless signal on a first time-frequency resource;
-a second sending module: for transmitting a first signaling;
wherein the first radio signal is generated by a first sequence, the first sequence is one complex sequence in a target sequence pair, the target sequence pair is one candidate sequence pair in X candidate sequence pairs, X is a positive integer, and each of the X candidate sequence pairs comprises two complex sequences conjugated to each other; the first wireless signal is used to determine at least one of { a position of the first time-frequency resource in a time domain, a position of the first time-frequency resource in a frequency domain }; the first wireless signal is broadcast; or the first wireless signal is multicast; the first signaling is used to determine a first profile ID, which is a profile ID corresponding to a sender of the first wireless signal.
14. The base station device of claim 13, wherein the second transmitting module is further configured to transmit a second wireless signal on a second time-frequency resource; the position of the first sequence in the target sequence pair is used to determine one of { the second time-frequency resource, a subcarrier spacing of RUs in the second time-frequency resource, a transmit antenna port group of the second wireless signal }; the first time frequency resource and the second time frequency resource are orthogonal, the RU occupies a subcarrier in a frequency domain and occupies the duration of a multicarrier symbol in a time domain; the second wireless signal is generated by a second sequence; or the second wireless signal is generated by a first bit block; the second sequence is a sequence other than the X candidate sequence pairs, and the first bit block comprises a positive integer number of bits; the transmit antenna port group includes a positive integer number of transmit antenna ports.
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