WO2017132969A1

WO2017132969A1 - Method and device for transmitting reference signal

Info

Publication number: WO2017132969A1
Application number: PCT/CN2016/073576
Authority: WO
Inventors: 吴作敏; 吕永霞; 马莎; 李超君
Original assignee: 华为技术有限公司
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2017-08-10

Abstract

Provided in the embodiment of the present invention is a method for transmitting a reference signal, which is capable of supporting the transmission of the reference signal in a short TTI transmission scenario. The method comprises: a transmission device determines a first transmission time interval TTI resource block, which occupies M symbols in a time domain and N frequency domain units in a frequency domain, each of the N frequency domain units comprising K consecutive subcarriers, wherein M≥1, N≥1, and K≥2; the transmission device determines P reference signals, which are reference signals of P antenna ports, P≥1; the transmission device transmits the P reference signals to a receiving device, wherein the i-th reference signal in the P reference signals is located on S frequency domain units in the N frequency domain units, also located on L subcarriers of each frequency domain unit in the S frequency domain units, and is located on a symbol in the M symbols, wherein 1≤S≤N and 1≤L<K.

Description

Method and apparatus for transmitting reference signals

Technical field

The present invention relates to the field of communications and, more particularly, to a method and apparatus for transmitting reference signals.

Background technique

In the communication network, latency is a key performance indicator (KPI), which also affects the user experience. With the development of communication protocols, the Transmission Time Interval (TTI) (or scheduling interval) of the physical layer, which has the most obvious impact on delay, is getting smaller and smaller, in the initial wideband code division multiple access (Wideband). In Code Division Multiple Access (WCDMA), the scheduling interval is 10 ms, the scheduling interval in High-Speed Packet Access (HSPA) is shortened to 2 ms, and the scheduling interval in Long Term Evolution (LTE) is shortened to 1 ms. The hourly service requirement requires the LTE physical layer to introduce a short TTI frame structure to further shorten the scheduling interval.

The existing LTE system for scheduling 1 ms TTI supports a transmission mode of a Demodulation Reference Signal (DMRS), wherein the downlink demodulation reference signal is at the end of each of the two slots included in the 1 ms TTI. On the two symbols, if the short TTI transmission supporting the transmission mode of the DMRS is introduced and the pattern of the existing DMRS is kept unchanged, the receiving side needs to wait until the DMRS is received before demodulating the information on the received short TTI. The existing DMRS pattern adds processing delay and is therefore no longer suitable for short TTI transmissions.

Summary of the invention

The present application provides a method for transmitting a reference signal, which can support transmission of a reference signal in a short TTI transmission scenario.

In a first aspect, the present application provides a method for transmitting a reference signal, the method comprising: determining, by a transmitting device, a first transmission time interval TTI resource block, where the first TTI resource block occupies M symbols in a time domain, in a frequency domain N frequency domain units are occupied, each of the N frequency domain units includes K consecutive subcarriers, where M≥1, N≥1, K≥2; the transmitting device determines P reference signals The P reference signals are reference signals of P antenna ports, P≥1; the transmitting device transmits the P reference signals to the receiving device, where the i th reference signal of the P reference signals is located S frequency domain units in N frequency domain units, and in the S frequency domain Each of the frequency domain units in the element occupies L subcarriers and is located on one of the M symbols, where 1≤S≤N, 1≤L<K.

With reference to the first aspect and the foregoing implementation manner, in a first implementation manner of the first aspect, the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarriers The group is discretely distributed within the frequency domain unit to which it belongs, and each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L,1 ≤ C ≤ (L / 2).

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, the ith reference signal is located on a first one of the M symbols, or the ith reference signal is located in the The mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n=ceil(M/2), ceil() indicates upward Rounded up, or the ith reference signal is located on a symbol other than the last symbol of the M symbols.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the N frequency domain units are divided into R ₁ first frequency domain unit groups, and the R ₁ first frequency domain unit groups Each of the frequency domain unit groups includes N ₁ consecutive frequency domain units, and the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the R ₁ second frequency domain unit groups The second frequency domain unit group includes S ₁ frequency domain units, and the R ₁ first frequency domain unit groups are in one-to-one correspondence with the R ₁ second frequency domain unit groups, N=N ₁ ·R ₁ , S=S ₁ · R ₁ , the S ₁ frequency domain unit is the N ₁ consecutive frequency domain units, where S ₁ =N ₁ , or the S ₁ frequency domain unit is in the N ₁ consecutive frequency domain units a discrete distribution, where N ₁ ≥ ₃ , ₂ ≤ S ₁ ≤ ceil (N ₁ /2), ceil () represents rounding up, or the S ₁ frequency domain unit is located in the N ₁ consecutive frequency domain unit The frequency domain unit of the central position, where N ₁ ≥ ₃ , ₁ ≤ S ₁ ≤ N ₁ -2.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the ith reference signal of the P reference signals includes Z elements, Z=S·L, the method further includes: The transmitting device generates Q first sequences of length Z, and any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are respectively Q antenna ports of the P antenna ports. a reference signal sequence, Q ≤ P, wherein the Q first sequences are obtained according to a second sequence of length Z and a third sequence of length L, and any two third sequences of the Q third sequences Orthogonal.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, the Q third sequence is obtained by Q orthogonal mask OCC sequences of length n ₁ , where n ₁ is less than or equal to An even number of L, or the Q third sequence is obtained by Q W sequences of length n ₂ , and n ₂ is an integer less than or equal to L, and the W sequence is

n _CS =0,1,...m ₁ -1, where m ₁ represents the length of the W sequence and n _CS represents the available cyclic shift, Q ≤ n _CS .

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, the i th reference signal of the P reference signals includes R ₁ sequence units, the R ₁ sequence unit and the R _One second frequency domain unit group is in one-to-one correspondence, each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z= R ₁ · Z ₁ , the method further includes: the transmitting device generates Q fourth sequences of length Z, and any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are respectively a reference signal sequence of Q antenna ports of the P antenna ports, Q≤P, wherein the Q fourth sequences are obtained according to a second sequence of length Z and a fifth sequence of length Z ₁ , the Q Any two of the fifth sequences in the fifth sequence are orthogonal.

With reference to the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, the i th reference signal of the P reference signals includes R ₁ sequence units, the R ₁ sequence unit and the R _One second frequency domain unit group is in one-to-one correspondence, each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z= R ₁ · Z ₁ , the method further includes: the transmitting device generates Q sixth sequences of length Z, and any two sixth sequences of the Q sixth sequences are orthogonal, and the Q sixth sequences are respectively a reference signal sequence of Q antenna ports of the P antenna ports, Q ≤ P, wherein the Q sixth sequences are repeatedly obtained according to Q first shovel-Chu ZC sequences of length Z ₁ , the Q Any two first ZC sequences in a ZC sequence are orthogonal.

With reference to the first aspect and the foregoing implementation manner, in an eighth implementation manner of the first aspect, the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and are in the first The subcarriers occupied in the frequency domain unit are the same, or the jth reference signal and the kth reference signal are located on the same symbol and the subcarriers occupied in each of the N frequency domain units are different. Or the jth reference signal and the kth reference signal are located on different symbols and the subcarriers occupied in each of the N frequency domain units are the same, or the jth reference signal and The kth reference signal is located on a different symbol and the subcarriers occupied in each of the N frequency domain units are different, wherein 1≤j≤P, 1≤k≤P, j≠k .

With reference to the first aspect and the foregoing implementation manner, in a ninth implementation manner of the first aspect, the method further includes: the sending device determining a second TTI resource block, where the second TTI resource block is the first TTI resource block a subsequent TTI resource block; the transmitting device transmits a first physical channel on the first TTI resource block, and transmits a second physical channel on the second TTI resource block; wherein the P antenna One antenna port in the port is used for demodulation of the first physical channel, and J antenna ports of the P antenna ports are used for demodulation of the second physical channel, P≥1, 1≤I≤P, 1 ≤ J ≤ P.

In a second aspect, the present application provides a method for transmitting a reference signal, the method comprising: receiving, by a receiving device, at least one of P reference signals sent by a transmitting device, where the P reference signals are reference signals of P antenna ports The P reference signals are carried on the first transmission time interval TTI resource block, where the first TTI resource block occupies M symbols in the time domain, and occupies N frequency domain units in the frequency domain, and the N frequency domain units Each of the frequency domain units includes K consecutive subcarriers, where P≥1, M≥1, N≥1, K≥2, and the i th reference signal of the at least one reference signal is located in the N frequency S frequency domain units in the domain unit, and occupying L subcarriers in each frequency domain unit of the S frequency domain units, and located on one of the M symbols, where 1≤S≤N 1 ≤ L < K; the receiving device performs at least one of the following according to the at least one reference signal: channel estimation, automatic gain control AGC adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, radio resource management RRM measurement , positioning measurement.

With reference to the second aspect and the foregoing implementation manner, in a first implementation manner of the second aspect, the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarriers The group is discretely distributed within the frequency domain unit to which it belongs, and each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L,1 ≤ C ≤ (L / 2).

With reference to the second aspect and the foregoing implementation manner, in a second implementation manner of the second aspect, the ith reference signal of the at least one reference signal is located on one of the M symbols, including: the ith The reference signal is located on the first one of the M symbols; or the ith reference signal is located on the mth symbol of the M symbols, wherein the mth symbol is in the M symbols a symbol of the first n symbols, where n=ceil(M/2), ceil() indicates rounding up; or the ith reference signal is located on a symbol other than the last symbol of the M symbols .

With reference to the second aspect and the foregoing implementation manner, in a third implementation manner of the second aspect, the N frequency domain units are divided into R ₁ first frequency domain unit groups, and the R ₁ first frequency domain unit groups Each of the frequency domain unit groups includes N ₁ consecutive frequency domain units, and the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the R ₁ second frequency domain unit groups The second frequency domain unit group includes S ₁ frequency domain units, and the R ₁ first frequency domain unit groups are in one-to-one correspondence with the R ₁ second frequency domain unit groups, N=N ₁ ·R ₁ , S=S ₁ · R ₁ , the S ₁ frequency domain unit is the N ₁ consecutive frequency domain units, where S ₁ =N ₁ ; or the S ₁ frequency domain unit is in the N ₁ consecutive frequency domain units a discrete distribution, where N ₁ ≥ ₃ , ₂ ≤ S ₁ ≤ ceil (N ₁ /2), ceil () indicates rounding up, or the S ₁ frequency domain unit is located in the N ₁ consecutive frequency domain units The frequency domain unit of the central position, where N ₁ ≥ ₃ , ₁ ≤ S ₁ ≤ N ₁ -2.

With reference to the second aspect and the foregoing implementation manner, in a fourth implementation manner of the second aspect, the ith reference signal of the at least one reference signal includes Z elements, Z=S·L, the method further includes: The receiving device generates a first sequence of length Z for the ith reference signal, wherein the first sequence is obtained from a second sequence of length Z and a third sequence of length L.

With reference to the second aspect and the foregoing implementation manner, in a fifth implementation manner of the second aspect, the i th reference signal of the at least one reference signal includes R ₁ sequence units, the R ₁ sequence unit and the R _One second frequency domain unit group is in one-to-one correspondence, each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z= R ₁ ·Z ₁ , the method further comprises: the receiving device generating a fourth sequence of length Z for the ith reference signal, wherein the fourth sequence is based on a second sequence of length Z and a length Z ₁ The fifth sequence is obtained.

With reference to the second aspect and the foregoing implementation manner, in a sixth implementation manner of the second aspect, the i th reference signal of the at least one reference signal includes R ₁ sequence units, the R ₁ sequence unit and the R _One second frequency domain unit group is in one-to-one correspondence, each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z= R ₁ · Z ₁ , the method further comprises: the receiving device generating a sixth sequence of length Z for the ith reference signal, wherein the sixth sequence is based on a first Zodolf-Chu sequence of length Z ₁ Repeatedly.

With reference to the second aspect and the foregoing implementation manner, in a seventh implementation manner of the second aspect, the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and in the S The subcarriers occupied in each of the frequency domain units are the same, or the jth reference signal and the kth reference signal are located on the same symbol and in each of the S frequency domain units The subcarriers occupied in the unit are different, or the jth reference signal and the kth reference signal are located on different symbols and the subcarriers occupied in each of the S frequency domain units are the same, or The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units, where 1≤j≤P, 1≤ k ≤ P, j ≠ k.

With reference to the second aspect and the foregoing implementation manner, in an eighth implementation manner of the second aspect, the method further includes: the receiving device receiving the first physical channel, where the first physical channel is carried on the first TTI resource block The first physical channel corresponds to one of the P antenna ports; the receiving device is configured to the first object according to a reference signal corresponding to the one of the P antenna ports The channel is demodulated, 1 ≤ I ≤ P. .

With reference to the second aspect and the foregoing implementation manner, in a ninth implementation manner of the second aspect, the method further includes: receiving, by the receiving device, a second physical channel, where the second physical channel is carried on the second TTI resource block, The second TTI resource block is a TTI resource block after the first TTI resource block, and the second physical channel corresponds to J antenna ports of the P antenna ports; the receiving device is configured according to J of the P antenna ports. The reference signal corresponding to the antenna ports demodulates the second physical channel, 1≤J≤P.

In a third aspect, the present application provides an apparatus for transmitting a reference signal for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, an apparatus for transmitting a reference signal for performing the method of any of the second aspect or the second aspect of the second aspect is provided. In particular, the apparatus comprises means for performing the method of any of the second aspect or any of the possible implementations of the second aspect.

In a fifth aspect, the present application provides an apparatus for transmitting a reference signal, the apparatus comprising: a bus system, a processor transceiver, and a memory. Wherein the transceiver, the memory and the processor are connected by a bus system, the memory is for storing instructions, the processor is for executing instructions stored by the memory to control the transceiver to send and receive signals, and when the processor executes the instructions stored in the memory, the processor is Performing the method of the first aspect or any possible implementation of the first aspect.

In a sixth aspect, the present application provides an apparatus for transmitting a reference signal, the apparatus comprising: a bus system, a processor transceiver, and a memory. Wherein the transceiver, the memory and the processor are connected by a bus system, the memory is for storing instructions, the processor is for executing instructions stored by the memory to control the transceiver to send and receive signals, and when the processor executes the instructions stored in the memory, the processor is Performing the method of the second aspect or any possible implementation of the second aspect.

In a seventh aspect, the application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.

In an eighth aspect, the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.

The present application provides a method and apparatus for transmitting a reference signal capable of supporting transmission of a reference signal in a short TTI transmission scenario.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

FIG. 1 is an application scenario of a method for transmitting a reference signal according to an embodiment of the present invention.

2 is a schematic structural diagram of a resource block according to an embodiment of the present invention.

3a through 3f are schematic diagrams showing the manner in which reference signals are arranged in the time domain according to an embodiment of the present invention.

4a-4c are schematic diagrams showing the manner in which reference signals are arranged in the frequency domain according to an embodiment of the present invention.

5a through 5f are diagrams showing a manner in which a reference signal is arranged in a frequency domain unit according to an embodiment of the present invention.

6 is a location of a configuration of a reference signal within a frequency domain unit group in accordance with an embodiment of the present invention.

7a and 7b are schematic diagrams showing the arrangement of reference signals of different antenna ports in a frequency domain unit according to an embodiment of the invention.

FIG. 8 is a schematic flow chart of transmitting a reference signal according to an embodiment of the invention.

FIG. 9 is a schematic flow chart of transmitting a reference signal according to another embodiment of the present invention.

FIG. 10 is a schematic block diagram of an apparatus for transmitting a reference signal according to an embodiment of the present invention.

11 is a schematic block diagram of an apparatus for transmitting a reference signal according to another embodiment of the present invention.

FIG. 12 is a schematic structural diagram of an apparatus for transmitting a reference signal according to an embodiment of the present invention.

FIG. 13 is a schematic structural diagram of an apparatus for transmitting a reference signal according to another embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The present invention describes various embodiments in conjunction with user equipment. User Equipment (UE) may be referred to as a terminal, a mobile station (Mobile Station, MS), and a mobile terminal. (Mobile Terminal), etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" phone), A computer or the like having a mobile terminal, for example, the user equipment may also be a portable, portable, handheld, computer built-in or in-vehicle mobile device and a terminal device in a future 5G network, which exchanges voice and/or with the wireless access network. data.

In addition, the present invention describes various embodiments in conjunction with a network device, which may be a Long Term Evolution (LTE) system or an Authorized Auxiliary Access Long-term Evolution (LAA-LTE) system. An evolved base station (Evolutional Node B, which may be referred to as an eNB or an e-NodeB), a macro base station, a micro base station (also referred to as a "small base station"), a pico base station, an access point (AP), or a transmission site (Transmission Point) , TP) and so on.

In the prior art, the downlink demodulation reference signal is usually configured on the last two symbols of each of the two slots included in the 1 ms TTI, if a short TTI transmission supporting the transmission mode of the DMRS is introduced and the existing DMRS is maintained. The pattern is unchanged, and the receiving device needs to wait until the DMRS reception is completed to demodulate the information on the received short TTI. The existing DMRS pattern increases the processing delay and is therefore no longer suitable for short TTI transmission.

FIG. 1 shows an application scenario of a method for transmitting a reference signal according to an embodiment of the present invention. As shown in FIG. 1, the application scenario includes a base station 101, a user equipment 102 and a user equipment 103 that are within the coverage of the base station 101 and are in communication with the base station 101. The base station 101 and the user equipment 102 are both devices that support short transmission time interval (TTI) transmission, and the user equipment 103 is a device that does not support short TTI transmission. The base station 101 can communicate with the user equipment 102 using a short TTI or a 1 ms TTI in the prior art, and the base station 101 can also communicate with the user equipment 103 using the 1 ms TTI in the prior art.

It should be understood that, in the embodiment of the present invention, the sending device may be a network device (for example, a network side device such as a base station), and the receiving device may be a terminal device (for example, a user device), that is, the method for transmitting a reference signal may be applied to Downlink transmission,

Alternatively, the sending device may also be a terminal device (for example, a user device), and the receiving device may be a network device (for example, a network side device such as a base station), that is, the method for transmitting a reference signal may be applied to an uplink transmission.

It should be understood that the technical solutions of the embodiments of the present invention may be applied to an LTE or LTE-A system, and may also be applied to other communication systems that need to transmit reference signals.

It should be understood that the minimum unit of system resources is a Resource Element (RE), and one RE includes one OFDM symbol in the time domain and one subcarrier in the frequency domain.

It should be understood that the uplink symbol is called Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol, and the downlink symbol is called Orthogonal Frequency Division Multiplexing (OFDM) symbol. If the uplink multiple access mode of the Orthogonal Frequency Division Multiple Access (OFDMA) is introduced in the future 5G technology or the LTE technology evolution, the uplink symbol may also be referred to as an OFDM symbol. In the embodiment of the present invention, the uplink symbol and The downlink symbols are collectively referred to as symbols, and may be other types of communication symbols, which are not limited in this embodiment of the present invention.

It should be understood that, in the embodiment of the present invention, a physical channel carries data information from higher layers, which may be a physical downlink shared channel (PDSCH), and a physical downlink control channel (physical downlink control channel (Physical). Downlink Control Channel (PDCCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ indicator channel (PHICH), Enhanced-Physical Downlink Control Channel (Enhanced-Physical Downlink Control Channel) , EPDCCH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH), and the like. It is also a newly introduced channel with the same function but different names in the standard, for example, a control channel or a data channel introduced in a short TTI transmission. It can also be a combination of the above channels.

It should be understood that a Reference Signal (RS) is used for the physical layer, and does not carry data information from a higher layer, such as a Cell-specific Reference Signal (CRS) for downlink, and is used for downlink terminal specific Reference signal (UE-specific Reference Signal, UE-RS) or Group-specific Reference Signal (GRS) for downlink, Demodulation Reference Signal (DMRS) for uplink, detection reference Sounding reference signal (SRS), etc. The UE-RS used for downlink is also called a Demodulation Reference Signal (DMRS) for downlink.

The DMRS for PUCCH demodulation is called PUCCH DMRS, and the DMRS for PUSCH demodulation is called PUSCH DMRS. The CRS is an RS that the network device configures to all terminal devices in the cell, the GRS is an RS that the network device configures to a group of terminal devices, and the DMRS is an RS that is configured to a specific terminal device. Each physical channel has its corresponding RS, and the receiving device can The RS performs channel estimation and then demodulates the physical channel based on the estimated channel value. The receiving device can also perform automatic gain control (AGC) adjustment, time-frequency synchronization estimation, channel state information measurement, radio resource management (RRM) measurement, positioning measurement, and the like according to the received RS. Therefore, the reference signal in the present invention can be used for at least one of physical channel demodulation, AGC adjustment, time-frequency synchronization, channel state information measurement, RRM measurement, positioning measurement, and the like.

It should also be understood that short TTI transmission refers to a transmission with a TTI less than 1 subframe or a TTI less than 1 ms. For example, the TTI length is one of 1, 2, 3, 4, 5, 6, and 7 symbols. Or the TTI length is a combination of at least two different symbol lengths of the foregoing multiple symbol lengths, for example, 4 TTIs are included in 1 ms, and the lengths are 4 symbols, 3 symbols, 4 symbols, 3 symbols, for example, The lengths are 3 symbols, 4 symbols, 3 symbols, 4 symbols, or other combinations, respectively. Wherein, 1 ms includes 4 TTIs, and the length is 4 or 3 symbols respectively, and the TTI length can be considered as 0.25 ms. There may be multiple short TTIs in the system, for example, the system supports a TTI length of 7 symbols and a TTI length of 0.25 ms is transmitted in 1 ms.

It should be noted that, considering backward compatibility, there may be a case of 1 ms TTI transmission and short TTI transmission in the system.

It should be understood that, in the embodiment of the present invention, the numbers "first" and "second" are only used to distinguish different objects, for example, to distinguish different resource blocks, physical channels, etc., and do not constitute any scope of the embodiments of the present invention. limited.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

First, a resource block (ie, a first TTI resource block) according to an embodiment of the present invention will be described in detail.

In the time domain, the first TTI resource block occupies M symbols, where M is a positive integer greater than or equal to one.

In the frequency domain, the first TTI resource block occupies N frequency domain units, and each frequency domain unit includes K consecutive subcarriers, where N is a positive integer greater than or equal to 1, and K is a positive greater than or equal to 2. Integer.

As shown in FIG. 2, two resource blocks are shown in the figure. For example, resource block #1 (ie, an example of the first TTI resource block) occupies 4 symbols in the time domain and 2 frequencies in the frequency domain. A domain unit, each frequency domain unit comprising 12 consecutive subcarriers.

For another example, resource block #2 (ie, an example of the first TTI resource block) occupies 3 characters in the time domain. No., occupying one frequency domain unit in the frequency domain, and each frequency domain unit includes 12 consecutive subcarriers.

It should be noted that the N frequency domain units may be continuous or non-contiguous in the frequency domain, and the N frequency domain units occupy the same symbol in the time domain.

Optionally, the N frequency domain units are divided into R ₁ first frequency domain unit groups, and each of the R ₁ first frequency domain unit groups includes N ₁ consecutive frequency domains. unit. That is, the resources occupied by the TTI resource block in the frequency domain are in units of frequency domain unit groups, and one frequency domain unit group may include N ₁ consecutive frequency domain units, and N ₁ ≥ 2. The R ₁ first frequency domain unit groups included in the first TTI resource block may be continuous or non-contiguous in the frequency domain, and R ₁ ≥1.

It should be noted that, in LTE and its corresponding evolved system, each frequency domain unit may be considered to include 12 consecutive subcarriers. In all embodiments of the present invention, each frequency domain unit includes 12 consecutive subcarriers as an example for description.

In addition, the above description only includes the number of subcarriers included in the frequency domain unit according to the embodiment of the present invention, and the number of the subcarriers included in the frequency domain unit according to the embodiment of the present invention is not limited. The scope of the composition constitutes any limitation. For example, each frequency domain unit may also include 20 subcarriers, or 6 subcarriers, and the like.

Hereinafter, the configuration manners of the reference signals according to the embodiments of the present invention are described in detail from the aspects of the time domain resources and the frequency domain resources occupied by the first reference signal, and the sequence of the first reference signals, and the like. It should be noted that the first reference signal may be a downlink reference signal or an uplink reference signal.

The first reference signal may include at most G antenna ports (also referred to as ports), the corresponding antenna port number is port g to port (g+G-1), and g represents the first antenna of the G antenna ports. The number of the port, each antenna port corresponds to a reference signal. The antenna port of the first reference signal is used for transmitting the first reference signal, that is, the transmitting device sends its corresponding reference signal through the antenna port, and the receiving device receives its corresponding reference signal through the same antenna port. For example, assuming that the first reference signal includes two antenna ports, namely port 7 and port 8, respectively, the transmitting device sends the reference signal of port 7 through port 7, transmits the reference signal of port 8 through port 8, and the receiving device passes the port. 7 receives the reference signal of port 7, and receives the reference signal of port 8 through port 8. The following takes the time domain position or the frequency domain position of the reference signal corresponding to one antenna port as an example for description.

First, the time domain position of the reference signal

Hereinafter, the manner in which the reference signals are arranged in the time domain will be described in detail.

In an embodiment of the invention, one reference signal is located on one symbol in the first TTI resource block, wherein the first TTI resource block is a resource block carrying a reference signal. The symbol in which the reference signal is located can be configured in multiple ways in the time domain, and can be divided into two cases (ie, Case 1 and Case 2). The configuration manners in these two cases are described in detail below.

Situation 1

The position of the symbol in which the reference signal is located in the time domain is related to the length or position of the TTI. That is, one TTI length corresponds to a reference signal configuration. More specifically, in this case, two configurations are included.

Mode 1

The reference signal is located on the mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n=ceil(M/2), Ceil() means round up; or,

The reference signal is located on the first symbol of the M symbols; or

The reference signal is located in the M symbols for the first symbol outside the backward compatible symbol.

It should be noted that, in LTE and its corresponding evolved system, 1 ms includes 14 symbols, and if short TTI transmission is introduced, 1 ms can be divided into multiple short TTIs. The description includes four short TTIs in 1 ms, and the lengths of the TTIs are four symbols, three symbols, four symbols, and three symbols, respectively. As shown in FIG. 3a, a configuration manner in which the reference signal is applied to the downlink in the time domain is shown. Specifically, a reference signal may be configured for each TTI. The traditional physical downlink control channel PDCCH occupies 2 symbols. To ensure backward compatibility, the reference signal of the 0th TTI can be configured in the first symbol outside the PDCCH region in the 0th TTI, that is, on the symbol 2, and the reference signals of the remaining 3 TTIs are respectively configured. The first symbol of the TTI to which it belongs is placed on symbol 4, symbol 7 and symbol 11, respectively.

For example, 4 ms includes 4 short TTIs, and the lengths of the TTIs are 4 symbols, 3 symbols, 4 symbols, and 3 symbols, respectively. If the reference signal is applied to the uplink, since the 0th TTI in the uplink is not used in the uplink, To a compatible symbol, the reference signal can be configured on the first symbol of each TTI, that is, on symbol 0, symbol 4, symbol 7, and symbol 11.

Take the length of the TTI as 2 symbols, that is, 1 ms including 7 TTIs. Figure 3b shows an arrangement of the reference signal in the time domain when applied to the downlink. As shown in FIG. 3b, the PDCCH occupies 2 symbols of the 0th TTI. Considering the overhead of the reference signal, the reference signal can be configured on three TTIs of the remaining six TTIs, and the time domain density of the reference signal can be considered, which can be in the first TTI, The reference signals are configured on the 5th TTI, wherein the reference signals are respectively located on the first symbol of the TTI to which they belong, that is, respectively, on the symbol 2, the symbol 6 and the symbol 10. Optionally, the reference signals of the first TTI and the second TTI are configured on symbol 2, and the reference signals of the third TTI and the fourth TTI are configured on symbol 6, the fifth TTI and the sixth TTI. The reference signal is placed on symbol 10.

For example, if the length of the TTI is 2 symbols, that is, 1 ms includes 7 TTIs, if the reference signal is applied to the uplink, since the last symbol in the uplink 1 ms TTI may be used for SRS transmission, consider backward compatibility, not in the sixth. The reference signal is configured in one TTI. Considering the overhead of the reference signal, the reference signal can be configured on the three TTIs of the remaining six TTIs. The reference signal can be configured on the 0th TTI, the 2nd TTI, and the 4th TTI considering the time domain density of the reference signal. Wherein, the reference signals are respectively located on the first symbol of the TTI to which they belong, that is, respectively arranged on symbol 0, symbol 4, and symbol 8. Optionally, the reference signals of the 0th TTI and the 1st TTI are configured on the symbol 0, and the reference signals of the 2nd TTI and the 3rd TTI are configured on the symbol 4, the 4th TTI, the 5th TTI, and The reference signal of the sixth TTI is arranged on symbol 8. Or, considering that the 0th TTI in the downlink may be used for PDCCH transmission, according to the HARQ feedback timing, the 4th TTI on the uplink resource corresponding to the 0th TTI may have no feedback information transmission, and thus may be in the 0th TTI, Two TTIs, the first symbol of the fifth TTI is configured with reference signals, that is, respectively arranged on symbol 0, symbol 4, and symbol 10.

Take the length of the TTI as 1 symbol, that is, 1 ms including 14 TTIs. Figure 3c shows an arrangement of the reference signal in the time domain when applied to the downlink. As shown in FIG. 3c, the 0th and 1st TTIs are used to transmit the PDCCH. Considering the overhead of the reference signal, the reference signal can be configured on 4 TTIs of the remaining 12 TTIs, considering the time domain density of the reference signal, which can be in the 2nd TTI, the 5th TTI, the 8th TTI, the 11th The reference signals are configured on the TTI, that is, the reference signals are respectively arranged on symbol 2, symbol 5, symbol 8 and symbol 11. Optionally, the reference signals of the second TTI, the third TTI, and the fourth TTI are configured on symbol 2, and the reference signals of the fifth TTI, the sixth TTI, and the seventh TTI are configured on symbol 5. The reference signals of the 8th TTI, the 9th TTI, and the 10th TTI are configured on symbol 8, and the reference signals of the 11th TTI, the 12th TTI, and the 13th TTI are disposed on the symbol 11.

For example, if the length of the TTI is 1 symbol, that is, 1 ms includes 14 TTIs, if the reference signal is applied to the uplink, since the last symbol in the uplink 1 ms TTI may be used for SRS transmission, consider backward compatibility, not in the 13th. The reference signal is configured in one TTI. Consider the overhead of the reference signal, The reference signal may be configured on the four TTIs of the remaining 13 TTIs. The reference signal may be configured on the 0th TTI, the 3rd TTI, the 7th TTI, and the 10th TTI according to the time domain density of the reference signal. That is, the reference signals are respectively arranged on symbol 0, symbol 3, symbol 7, and symbol 10. Optionally, the reference signals of the 0th TTI, the 1st TTI, and the 2nd TTI are configured on the symbol 0, and the reference signals of the 3rd TTI, the 4th TTI, the 5th TTI, and the 6th TTI are configured. On symbol 3, the reference signals of the 7th TTI, the 8th TTI, and the 9th TTI are placed on symbol 7, the 10th TTI, the 11th TTI, the 12th TTI, and the 13th TTI (if the first A reference signal on which no SIR is transmitted on the 13 TTIs is placed on the symbol 10.

It should be noted that some TTI resource blocks may not be configured with reference signals.

It should be noted that the symbols occupied by the downlink PDCCH are symbols for backward compatibility. The traditional PDCCH may occupy 1 to 3 symbols, so the downlink reference signal should be configured on the symbols outside the PDCCH region to ensure backward compatibility. Or, the number of symbols occupied by the fixed PDCCH, for example, the PDCCH is fixed by 2 symbols, and the downlink reference signal may be configured on the symbol 2.

Mode 2

The reference signal is located on one of the M symbols except the last one.

The mode 2 is similar to the mode 1 described above, and is not described here.

In the case 1, the reference signal is placed in the previous position in a TTI resource block, so that the receiving device performs channel estimation according to the reference signal before receiving the complete TTI resource block, thereby reducing the processing delay of the receiving end.

Situation 2

The position of the symbol in which the reference signal is located in the time domain is independent of the length or position of the TTI. That is, when the system supports multiple short TTI lengths to be transmitted within 1 ms, various short TTI lengths correspond to one reference signal configuration.

In this case, TTIs of different lengths share the same set of reference signal patterns.

For example, as shown in FIG. 3d, the reference signals applied to the downlink within 1 ms are respectively arranged on symbol 2, symbol 6, and symbol 10. If 1 ms is divided into 7 TTIs, each TTI is 2 symbols in length, and assuming that the 0th TTI is used to transmit the PDCCH, the reference signals of the 1st TTI and the 2nd TTI are at symbol 2, and the third The reference signals of the TTI and the 4th TTI are at symbol 6, and the reference signals of the 5th TTI and the 6th TTI are at symbol 10.

For another example, if 1 ms is divided into 3 TTIs, the 0th TTI includes 6 symbols (assuming that the first 1 to 3 symbols are likely to be used for PDCCH transmission), and the 1st and 2nd TTIs each include 4 Symbol, then the reference signal of the 0th TTI is on symbol 2, the reference signal of the 1st TTI is on symbol 6, and the reference signal of the 2nd TTI is on symbol 10.

For another example, if 1 ms is divided into 4 TTIs, the 0th TTI includes 5 symbols (assuming that the first 1 to 3 symbols are likely to be used for PDCCH transmission), the first TTI, the second TTI, and the third TTI. Each includes 3 symbols, then the reference signal of the 0th TTI is on symbol 2, and the reference signal of the 3rd TTI is on symbol 10. For the first TTI and the second TTI, the reference signal may be within the current TTI, ie, at symbol 6 and symbol 10, respectively; the reference signal may also be on the symbol of the nearest reference signal of the current TTI, ie , on symbol 2 and symbol 6, respectively.

Optionally, the reference signal on the current TTI may be on the symbol where the other reference signal of the current TTI is located, but the reference signal of the next TTI is carried on the current TTI. It should be noted that, in this case, the physical channel carried on the current TTI needs to perform rate matching on the location of the reference signal carried on the current TTI, that is, the physical channel on the current TTI and the reference signal on the current TTI. RE is different.

It can be seen that in the case where the above TTI lengths are different, the reference signals are all arranged on the symbol 2, the symbol 6 and the symbol 10.

When the reference signal is applied to the uplink in Case 2, it is similar to the manner in which the reference signal is applied to the downlink, and details are not described herein again.

When the system supports multiple short TTI lengths to be transmitted within 1 ms, the manner in which the position of the reference signal is fixed in Case 2 may enable the receiving device to receive the reference signal without knowing the length or position of the TTI resource block.

It should be noted that, for one transmission, the number of configured reference signals is determined according to channel estimation performance and channel overhead. If the reference signal is too thin, the channel estimation performance is unacceptable, and the reference signal is too dense, which in turn leads to an increase in channel overhead. Therefore, the configuration of the reference signal needs to be balanced between the two.

In addition, the reference signal should be placed on the preceding symbol as much as possible, so that the channel can be demodulated as early as possible to reduce the processing delay.

In another embodiment of the present invention, one reference signal is located on two adjacent symbols in the first TTI resource block, where the first TTI resource block is a resource block carrying a reference signal. Similar to the embodiment in which the reference signal is located on one symbol, the symbol in which the reference signal is located can be configured in multiple ways in the time domain, and is also described in two cases.

Situation 1

The position of the symbol in which the reference signal is located in the time domain is related to the length or position of the TTI. That is, one TTI length corresponds to a reference signal configuration. More specifically, the following configuration methods are included:

The reference signal is located on the mth symbol and the (m+1)th symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n=ceil(M/2), ceil() means round up; or,

The reference signal is located on the first symbol and the second symbol of the M symbols; or

The reference signal is located in the M symbols for the 1st symbol and the 2nd symbol outside the backward compatible symbol.

The following is a brief description of this configuration.

It is divided into 7 TTIs in 1 ms, and the length of each TTI is 2 symbols as an example. Figure 3e shows an arrangement of the reference signal in the time domain when applied to the downlink. As shown in FIG. 3e, the PDCCH occupies 2 symbols of the 0th TTI. Considering the overhead of the reference signal, the reference signal can be configured on two TTIs of the remaining six TTIs, and the reference signal can be configured on the first TTI and the fourth TTI considering the time domain density of the reference signal, wherein the reference signal They are respectively located on two adjacent symbols of the TTI to which they belong, that is, respectively arranged on symbol 2 and symbol 3, symbol 8 and symbol 9. Optionally, the reference signals of the first TTI, the second TTI, and the third TTI are configured on

symbols

2 and 3, and the reference signals of the fourth TTI, the fifth TTI, and the sixth TTI are configured in the symbol. 8 and symbol 9 on.

It is divided into 7 TTIs in 1 ms, and the length of each TTI is 2 symbols as an example. If the reference signal is applied to the uplink, since the last symbol in the uplink 1 ms TTI may be used for the transmission of the SRS, considering the backward compatibility, the reference signal is not configured in the sixth TTI. Considering the overhead of the reference signal, the reference signal can be configured on two TTIs of the remaining six TTIs, and the reference signal can be configured on the 0th TTI and the third TTI considering the time domain density of the reference signal, wherein the reference signal They are respectively located on two adjacent symbols of the TTI to which they belong, that is, respectively arranged on symbol 0 and symbol 1, symbol 6 and symbol 7. Optionally, the reference signals of the 0th TTI, the 1st TTI, and the 2nd TTI are configured on the symbol 0 and the symbol 1, and the third TTI, the fourth TTI, the fifth TTI, and the sixth TTI The reference signals are arranged on

symbols

6 and 7.

Figure 3f shows another configuration of the reference signal in the time domain when applied to the downlink. As shown in FIG. 3f, reference signals are configured on the first TTI, the third TTI, and the fifth TTI, where the reference signals are respectively located on two adjacent symbols of the TTI to which they belong, that is, respectively Symbol 2 and Symbol 3, Symbol 6 and Symbol 7, and Symbol 10 and Symbol 11. Optional, first The reference signals of the TTI and the second TTI are arranged on

symbols

2 and 3, and the reference signals of the 3rd TTI and the 4th TTI are arranged on

symbols

6 and 7, and the reference of the 5th TTI and the 6th TTI The signals are arranged on

symbols

10 and 11.

It should be noted that the symbols occupied by the downlink PDCCH are symbols for backward compatibility. The traditional PDCCH may occupy 1 to 3 symbols, so the downlink reference signal should be configured on the symbols outside the PDCCH region to ensure backward compatibility. Or, the number of symbols occupied by the fixed PDCCH, for example, the PDCCH is fixed by 2 symbols, and the downlink reference signal may be configured on the

symbols

2 and 3.

Situation 2

The position of the symbol in which the reference signal is located in the time domain is independent of the length or position of the TTI. That is, when the system supports multiple short TTI lengths to be transmitted within 1 ms, various short TTI lengths correspond to one reference signal configuration. The difference between the configuration in this case and the case 2 in the embodiment in which the reference signal is located on one symbol is that the reference signal occupies two adjacent symbols, and other features are similar, and details are not described herein again.

Similarly, the reference signal should be placed on the preceding symbol as much as possible so that the channel is demodulated as early as possible to reduce processing delay.

Second, the frequency domain position of the reference signal

In the embodiment of the present invention, the reference signal has multiple configurations in the frequency domain. According to the foregoing description of the resource block, the resource block (ie, the first TTI resource block) includes N frequency domain units in the frequency domain, and each frequency domain unit includes K consecutive subcarriers.

Hereinafter, the manner in which the reference signals are arranged on the N frequency domain units will be described in detail with reference to FIGS. 4a to 4c.

Mode 1

The reference signal is configured on S frequency domain units in the N frequency domain units, S=N, that is, the reference signal is configured on each of the frequency domain units of the N frequency domain units.

It should be noted that the N frequency domain units may be continuous or non-contiguous in the frequency domain.

It should be noted that combining the reference signals on multiple frequency domain units for channel estimation improves the performance of channel estimation. Optionally, the reference signal is configured on each of the N frequency domain units, where the N frequency domain units are divided into R ₁ first frequency domain unit groups, and the R ₁ first frequency domain Each frequency domain unit group in the unit group includes N ₁ consecutive frequency domain units. That is, the transmitting device determines the first TTI resource block in units of the first frequency domain unit group. The R ₁ first frequency domain unit groups may be continuous or non-contiguous in the frequency domain. Preferably, the value of N ₁ may be 5. Preferably, the value of N ₁ may be 10. It should be noted that the above N ₁ value is an example and is not a limitation.

4a is a diagram of a configuration of a reference signal in the frequency domain in accordance with an embodiment of the present invention. As shown in FIG. 4a, resource block #A (ie, an example of a first TTI resource block) includes 4 symbols in the time domain, 5 consecutive frequency domain units in the frequency domain, and 5 consecutive frequency domain units. Divided into one first frequency domain unit group, each frequency domain unit includes 12 consecutive subcarriers, and the reference signal is configured on each of the five consecutive frequency domain units. For another example, the resource block #A includes 20 frequency domain units, and the 20 frequency domain units can be divided into two first frequency domain unit groups, and each of the first frequency domain unit groups includes 10 consecutive frequency domain units, and the reference signal It can be configured on each of the frequency domain units in each of the first frequency domain unit groups.

Mode 2

The reference signal is configured on the S frequency domain units of the N frequency domain units, where the N frequency domain units are divided into R ₁ first frequency domain unit groups, where the R ₁ first frequency domain unit groups Each frequency domain unit group includes N ₁ consecutive frequency domain units, and the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the R ₁ second frequency domain unit groups a second unit group frequency domain S ₁ comprises a frequency-domain units of R ₁ of first frequency domain and the cell group of R ₁ a second set of frequency-domain units correspond, the frequency-domain S ₁ unit A frequency domain unit located at a central location of the N ₁ consecutive frequency domain units.

Figure 4b is a diagram of a configuration of a reference signal in the frequency domain in accordance with an embodiment of the present invention. As shown in FIG. 4b, resource block #B (ie, an example of the first TTI resource block) includes 4 symbols in the time domain, 3 consecutive frequency domain units in the frequency domain, and 3 consecutive frequency domain units. It is divided into 1 first frequency domain unit group, and each frequency domain unit includes 12 consecutive subcarriers. The reference signal occupies the symbol 2 in the time domain, and is disposed on the frequency domain unit of the three consecutive frequency domain units at the center position in the frequency domain. For another example, the first TTI resource block includes 12 consecutive frequency domain units, and the 12 frequency domain units can be divided into two first frequency domain unit groups, and each of the first frequency domain unit groups includes six consecutive frequency domain units. The reference signal may be configured on two frequency domain units at a central position in each of the first frequency domain unit groups.

Mode 3

The reference signal is configured on the S frequency domain units of the N frequency domain units, where the N frequency domain units are divided into R ₁ first frequency domain unit groups, where the R ₁ first frequency domain unit groups Each frequency domain unit group includes N ₁ consecutive frequency domain units, and the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the R ₁ second frequency domain unit groups the second cell group comprising frequency-domain frequency domain S ₁ units of R ₁ of first frequency domain and the cell group of R ₁ a second set of frequency-domain units correspond, the frequency-domain S ₁ unit The N ₁ consecutive frequency domain units are discretely distributed.

4c is a diagram of a configuration of a reference signal in the frequency domain in accordance with an embodiment of the present invention. As shown in FIG. 4c, resource block #C (ie, an example of the first TTI resource block) includes 4 symbols in the time domain, 5 consecutive frequency domain units in the frequency domain, and 5 consecutive frequency domain units. Dividing into one first frequency domain unit group, each frequency domain unit includes 12 consecutive subcarriers, and the reference signal is configured on three frequency domain units of the five consecutive frequency domain units, the three frequency domains. The cells are equally spaced. For another example, the resource block #C includes 16 consecutive frequency domain units, and the 16 frequency domain units can be divided into two first frequency domain unit groups, and each of the first frequency domain unit groups includes eight consecutive frequency domain units. The reference signal may be configured on four frequency domain units in each of the first frequency domain unit groups, and one of the two frequency domain units in the four frequency domain units is separated by a frequency domain unit.

Hereinafter, the manner in which the reference signals are arranged in each frequency domain unit will be described in detail with reference to FIGS. 5a to 5f. The following description of the configuration on the frequency domain unit (referred to as frequency domain unit #1 for ease of understanding and description) is described by way of example and not limitation.

Mode 1

The reference signal occupies L subcarriers in the frequency domain unit #1, and the L subcarriers are divided into R subcarrier groups, the R subcarrier groups are discretely distributed in the frequency domain unit #1, and each subcarrier group includes C consecutive Subcarriers, where L ≥ 2, C = L / R, 2 ≤ R ≤ L, 1 ≤ C ≤ (L / 2).

Optionally, as an embodiment, the L subcarriers may be divided into L subcarrier groups, the L subcarrier groups are discretely distributed in the frequency domain unit #1, and each subcarrier group includes 1 subcarrier. Assuming L=4, FIG. 5a is a configuration of a reference signal on a frequency domain unit according to an embodiment of the present invention. As shown in FIG. 5a, the frequency domain unit #1 includes 4 symbols in the time domain, 12 subcarriers in the frequency domain, and the reference signal occupies 4 subcarriers in the frequency domain unit #1, and the 4 subcarriers are located. The same symbol, and is equally spaced in the 12 subcarriers included in the frequency domain unit #1.

Optionally, as an embodiment, the L subcarriers may be divided into two subcarrier groups, the two subcarrier groups are discretely distributed in the frequency domain unit #1, and each subcarrier group includes (L/2) subcarriers. . Assuming L=4, FIG. 5b is a configuration of a reference signal on a frequency domain unit according to an embodiment of the present invention. As shown in FIG. 5b, the frequency domain unit #1 includes 3 symbols in the time domain, 12 consecutive subcarriers in the frequency domain, and the reference signal occupies 4 subcarriers in the frequency domain unit #1. The four subcarriers are located in the same symbol and are divided into two subcarrier groups, and each subcarrier group includes two consecutive subcarriers. The two subcarrier groups are equally spaced in the frequency domain unit #1.

Mode 2

The reference signal occupies L subcarriers in frequency domain unit #1, the L subcarriers being consecutive subcarriers, and the L consecutive subcarriers are located at a central location within frequency domain unit #1.

Optionally, as an embodiment, assuming L=4, the 4 consecutive subcarriers are located at a central location within the frequency domain unit #1. Figure 5c is a diagram of a configuration of a reference signal on a frequency domain unit in accordance with an embodiment of the present invention. As shown in FIG. 5c, the frequency domain unit #1 includes 4 symbols in the time domain, 12 subcarriers in the frequency domain, and the reference signal occupies 4 subcarriers in the frequency domain unit #1, and the 4 subcarriers are located. The same symbol and located at the center of the 12 subcarriers included in the frequency domain unit #1.

Optionally, as an embodiment, the reference signal is configured on one of the M symbols and fills the entire symbol. Figure 5d illustrates an arrangement of reference signals on a frequency domain unit in accordance with an embodiment of the present invention. As shown in FIG. 5d, the frequency domain unit #1 includes 2 symbols in the time domain, 12 subcarriers in the frequency domain, and the reference signal fills the entire symbol in the frequency domain unit #1, that is, 12 subcarriers are occupied.

It should be understood that the discrete distribution of the reference signal in the frequency domain unit can make the channel estimation performance better, and the continuous distribution of the reference signal in the frequency domain unit can make the orthogonality of the frequency domain better. Therefore, the mode 1 can guarantee a certain frequency domain. The channel estimation performance is better in the case of orthogonality.

It should be understood that the orthogonality of the reference signal continuously distributed in the frequency domain unit in the frequency domain is better. Therefore, mode 2 can utilize the orthogonality of L consecutive subcarriers in the frequency domain to transmit more in frequency domain code division multiplexing. Layer signal.

It should be noted that both Mode 1 and Mode 2 are exemplified by a reference signal being located on one symbol. For the case where one reference signal is located on two adjacent symbols, the features described in the

above modes

1 and 2 are still applicable. In the following manner, the case where one reference signal is located on two adjacent symbols is described in the above manner, and is described as mode 3.

Mode 3

The reference signal occupies L resource elements RE in the frequency domain unit #1, and the L REs are divided into R RE groups, and the R RE groups are discretely distributed in the frequency domain unit #1, and each RE group includes 2 · C REs, specifically, C consecutive subcarriers in the frequency domain and REs corresponding to two symbols adjacent in the time domain, where L≥4, C=L/R, 2≤R≤(L/2) , 1 ≤ C ≤ (L / 4).

Optionally, as an embodiment, the L REs may be divided into (L/2) RE groups, and the (L/2) RE groups are discretely distributed in the frequency domain unit #1, and each RE group Includes 2 REs adjacent in the time domain. Assuming L=8, FIG. 5e is a configuration of a reference signal on a frequency domain unit according to an embodiment of the present invention. As shown in FIG. 5e, the frequency domain unit #1 includes 4 symbols in the time domain, 12 subcarriers in the frequency domain, and the reference signal occupies 8 REs in the frequency domain unit #1, and the 8 RE points It is a group of 4 REs, located in two adjacent symbols, and is equally spaced in the 12 subcarriers included in the frequency domain unit #1.

Optionally, as an embodiment, the L REs may be divided into two RE groups, and the two RE groups are discretely distributed in the frequency domain unit #1, and each RE group includes a frequency domain (L/4). Consecutive subcarriers and REs corresponding to two symbols in the time domain. Assuming L=8, FIG. 5f is a configuration of a reference signal on a frequency domain unit according to an embodiment of the present invention. As shown in FIG. 5f, the frequency domain unit #1 includes 2 symbols in the time domain, 12 consecutive subcarriers in the frequency domain, and the reference signal occupies 8 REs in the frequency domain unit #1, and the 8 The REs are divided into 2 RE groups, and each RE group includes 4 REs, corresponding to 2 consecutive subcarriers in the frequency domain and 2 consecutive symbols in the time domain. The two RE groups are equally spaced at intervals of 12 subcarriers included in the frequency domain unit #1.

The above manner 2 is similar to the above manner 3 in that a reference signal is located on two adjacent symbols, and details are not described herein again.

It should be understood that, optionally, if it is a downlink reference signal, in order to ensure backward compatibility, the configuration of the reference signal in the frequency domain unit avoids the Common Reference Signal (CRS) position. In other words, the downlink reference signal is different from the RE occupied by the CRS.

It should be noted that any one of the configuration manners of the reference signal in the time domain, any one of the configuration manners of the reference signal on the N frequency domain units, and the reference signal in one frequency domain unit Any one of the configuration modes can be used in combination to determine the time-frequency resource location of the reference signal.

Hereinafter, taking the short TTI downlink transmission in the LTE system and its evolved system as an example, the time-frequency resource location of the reference signal is specifically described. It is assumed that 1 ms is divided into 7 TTIs, each TTI is 2 symbols in length, and the 0th TTI is assumed to be used for transmitting the PDCCH. Considering the overhead of the reference signal and the channel estimation performance, the reference signal is located at symbol 2, symbol 6 and symbol 10 within 1 ms in the time domain, and includes two subcarrier groups equally spaced in a frequency domain unit in the frequency domain, each Each subcarrier group includes 2 consecutive subcarriers. The network device divides the frequency domain resource into H frequency domain unit groups, and each frequency domain unit group includes N ₁ consecutive frequency domain units, wherein each of the N ₁ consecutive frequency domain units is configured on the frequency domain unit. Reference signal. The network device determines that the physical channel occupies R ₁ frequency domain unit groups in the H frequency domain unit groups. Figure 6 shows how the reference signal is arranged in a frequency domain unit group when N ₁ = 5 is described.

Third, the reference signal of different antenna ports

As described above, the first reference signal can support up to G antenna ports, the corresponding antenna port number is port g to port (g+G-1), and g represents the number of the first antenna port of the G antenna ports. Each antenna port corresponds to a reference signal. The reference signals of any two of the G antenna ports may be distinguished by different occupied time domain resources, or different occupied frequency domain resources, or different sequence of reference signals.

The G antenna ports correspond to G reference signals, and any two reference signals of the G reference signals (hereinafter referred to as reference signal j and reference signal k for ease of understanding and description) may be configured by 4 Kind of situation.

Situation 1

The reference signal j and the reference signal k are located on the same symbol and the subcarriers occupied in each of the frequency domain units are the same in the S frequency domain units.

Situation 2

The reference signal j and the reference signal k are located on the same symbol and the subcarriers occupied in each of the frequency domain units are different.

Situation 3

The reference signal j and the reference signal k are located on different symbols and the subcarriers occupied in each of the frequency domain units are the same in the S frequency domain units.

Situation 4

The reference signal j and the reference signal k are located on different symbols and the subcarriers occupied in each of the frequency domain units are different in the S frequency domain units.

Hereinafter, a reference signal is placed on one symbol, which will be described in detail in conjunction with FIGS. 7a and 7b.

FIG. 7a is a schematic diagram showing the configuration of reference signals of different antenna ports in one frequency domain unit according to an embodiment of the invention. The following reference signals are taken as an example for description, and the uplink reference signals are similar and will not be described again. As shown in FIG. 7a, the G antenna ports are divided into at least two groups, and the specific division manner is not limited. The reference signals of the antenna ports in each group occupy the same time-frequency resource position, and are distinguished by different reference signals; The reference signal of the antenna port between the groups is occupied by The time domain resources are different, or the occupied frequency domain resources are different; the number of REs occupied by the reference signals of the two antenna ports of different groups may be the same or different. For example, suppose the first reference signal supports up to 8 antenna ports, the port number is 7 to 14, the 8 antenna ports are divided into 2 groups, the first group antenna port includes ports 7 to 10, and the second group antenna port includes ports. 11 to 14. The reference signals of ports 7 to 10 occupy the position corresponding to reference signal #1 shown in FIG. 7a and are distinguished by 4 orthogonal reference signal sequences, and the reference signals of ports 11 to 14 occupy the same as shown in FIG. 7a. The position corresponding to reference signal #2 is distinguished by four orthogonal reference signal sequences. The four orthogonal reference signal sequences included in the first group and the four orthogonal reference signal sequences included in the second group may be the same or different.

FIG. 7b is a schematic diagram showing the configuration of reference signals of different antenna ports in one frequency domain unit according to an embodiment of the invention. The following reference signals are taken as an example for description, and the uplink reference signals are similar and will not be described again. As shown in FIG. 7b, for a schematic diagram of case 1, each of the G reference signals is located on the same symbol and the subcarriers occupied in each frequency domain unit are the same, and any of the G reference signals The two reference signals are distinguished by two orthogonal reference signal sequences.

Fourth, the sequence of reference signals

The configuration of the resource block (ie, the first TTI resource block) and the first reference signal in the time domain or the frequency domain according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 7b. A method of generating a reference signal sequence in an embodiment of the present invention.

First, a case where one reference signal is located on one symbol will be described.

According to the configuration manner of the foregoing first reference signal on the first TTI resource block, any one of the G antenna ports (for ease of understanding and description, hereinafter referred to as antenna port #1) a reference signal (hereinafter referred to as reference signal #1 for ease of understanding and description) is configured on S frequency domain units among N frequency domain units included in the first TTI resource block, and at the S frequency Each of the frequency domain units in the domain unit occupies L subcarriers. Thus, if the length of the reference signal #1 is denoted by Z, then Z = S·L.

It should be understood that the length of the reference signal #1 is Z, or that the sequence of the reference signal #1 includes Z elements, or that the sequence of the reference signal #1 occupies Z on the first TTI resource block. RE.

In the embodiment of the present invention, a method for generating G reference signals corresponding to G antenna ports includes multiple manners.

Mode 1

The transmitting device generates Q first sequences of length Z, and any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are respectively Q antennas of the G antenna ports Reference signal sequence of the port, Q≤G,

The Q first sequence is obtained according to a second sequence of length Z and a third sequence of length L, and any two third sequences of the Q third sequences are orthogonal.

Specifically, the transmitting device may generate Q lengths of Z according to sequence #1 of length Z (ie, an example of the second sequence) and Q sequences #2 of length L (ie, a column of the third sequence). Sequence #3 (ie, an example of the first sequence), wherein any two of the Q sequences #2 are orthogonal to each other, and any two of the Q sequences #3 are orthogonal to the sequence #3 .

Optionally, as an embodiment, the second sequence of length Z is obtained by the following r sequence:

Where c(x) represents a formula for generating a pseudo-random sequence.

Optionally, as an embodiment, L _S is a number of subcarriers occupied by a reference signal on a frequency domain unit,

The number of frequency domain units that can be occupied by the system bandwidth, that is, the elements of the r sequence correspond to the number of REs occupied by the reference signal in the entire bandwidth, and the second sequence on the S frequency domain units where the reference signal is located corresponds to the second sequence in the r sequence The elements on the S frequency domain units are composed.

The number of frequency domain units occupied by the bandwidth of the short TTI transmission, that is, the elements of the r sequence correspond to the number of REs occupied by the reference signal in the bandwidth of the short TTI transmission, and the second sequence on the S frequency domain units where the reference signal is located. And consisting of elements in the r sequence corresponding to the S frequency domain units.

The size is equal to the number of frequency domain units S in which the reference signal is located, that is, the r sequence is the second sequence.

Optionally, as an embodiment, L _S is a number of REs occupied by reference signals on a frequency domain unit within 1 ms,

The number of frequency domain units occupied by the system bandwidth, that is, the elements of the r sequence correspond to the number of REs occupied by the reference signal in the entire bandwidth within 1 ms, and the second sequence on the S frequency domain units where the reference signal is located is from the r sequence Corresponding to the element composition on the S frequency domain units.

Optionally, as an embodiment, the Q third sequence of length L is obtained by Q orthogonal mask OCC sequences of length n ₁ , and n ₁ is an even number less than or equal to L.

For example, L=4, Q=2, n ₁ =2, and mutually orthogonal OCC sequence #1 and OCC sequence #2 of length 2 are selected as the base sequence, wherein OCC sequence #1 is [11], OCC sequence #2 is [-11], repeating OCC sequence #1 twice to obtain sequence #3 as [1111], and repeating OCC sequence #2 twice, to obtain sequence #4 as [-11-11], sequence #3 and Sequence #4 is the Q third sequence of length L. For another example, the OCC sequence #1 is repeated twice in a positive and negative manner to obtain the sequence #5 as [1111], and the OCC sequence #2 is repeated twice in a positive and negative manner to obtain the sequence #6 as [- 111-1], sequence #5 and sequence #6 are Q third sequences of length L. Alternatively, the base sequence OCC sequence #1 and the OCC sequence #2 may be considered to correspond to Q antenna ports, respectively.

For another example, L=4, Q=4, n ₁ =4, and mutually orthogonal OCC sequences #1, #2, #3, #4 of length 4 are selected as the base sequence, wherein the OCC sequence #1 is [ 1111], OCC sequence #2 is [1-11-1], OCC sequence #3 is [11-1-1], OCC sequence #4 is [1-1-11], base sequence #1, #2, #3, #4 is the third sequence of Q length L. Alternatively, the base sequences #1, #2, #3, and #4 may be considered to correspond to Q antenna ports, respectively.

It should be noted that the above-mentioned selected mutually orthogonal OCC sequences are examples and are not limiting.

Optionally, as an embodiment, the Q third sequences of length L are obtained by Q W sequences of length n ₂ , and n ₂ is an integer less than or equal to L, and the W sequence is:

Where m ₁ represents the length of the W sequence and n _CS represents the available cyclic shift.

It should be noted that the Q third sequences of length L can be obtained by Q different cyclic shifts of the same W sequence, Q≤n _CS .

It should be noted that the Q-length third sequence of L is obtained by Q W sequences of length n ₂ and the Q-length third sequence is composed of Q orthogonal mask OCCs of length n ₁ . The sequence is obtained in a similar manner and will not be described here.

It should be noted that the r sequence or the W sequence in the embodiment of the present invention is generated in the same manner as the r sequence or the W sequence in the prior art.

Optionally, as an embodiment, the Q first sequences are obtained according to a second sequence of length Z and a third sequence of length L, including: in a third sequence of Q length L Each third sequence is repeated S times to obtain Q sequences of length Z, and the elements in each of the Q length Z sequences are multiplied by the elements in the second sequence of length Z. , Q first sequences of length Z are obtained.

Optionally, as an embodiment, the Q first sequences are obtained according to a second sequence of length Z and a third sequence of length L, including: in a third sequence of Q length L Each of the third sequences is repeated one by one to obtain Q sequences of length Z, and the elements in each of the Q sequences of length Z and the elements in the second sequence of length Z are A corresponding point multiplication gives Q first sequences of length Z.

Mode 2

The transmitting device generates Q fourth sequences of length Z, and any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are respectively Q of the G antenna ports Reference signal sequence of antenna ports, Q≤G,

The Q fourth sequence is obtained according to a second sequence of length Z and a Q sequence of length Z ₁ , and any two of the Q fifth sequences are orthogonal.

It should be noted that, in this manner, the N frequency domain units included in the first TTI resource block are divided into R ₁ first frequency domain unit groups, and each of the first frequency domain unit groups includes N ₁ consecutive groups. Frequency domain unit.

Correspondingly, the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each second frequency domain unit group includes S ₁ frequency domain units. The R ₁ first frequency domain unit groups are in one-to-one correspondence with the R ₁ second frequency domain unit groups.

It can be seen that N, N ₁ and R ₁ satisfy the relationship N=N ₁ ·R ₁ , and similarly, S, S ₁ and N ₁ satisfy the relationship S=S ₁ ·R ₁ .

Incidentally, the transmission device upon determining a first resource block TTI, the need to ensure the N frequency-domain units R ₁ may be divided into cell groups of the first frequency domain, frequency domain and each of the first unit should include The same number of frequency domain units. That is to say, the resources occupied by the TTI resource block in the frequency domain are in units of frequency domain unit groups, and one frequency domain unit group may include N ₁ consecutive frequency domain units. The R ₁ first frequency domain unit groups included in the first TTI resource block may be continuous or non-contiguous in the frequency domain.

Specifically, the sequence of the reference signal #1 includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Assuming that each of the R ₁ sequence units includes Z ₁ elements, then Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ .

Specifically, the transmitting device may generate Q lengths Z according to sequence #4 of length Z (ie, an example of the second sequence) and Q sequences #5 of length Z ₁ (ie, a column of the fifth sequence). Sequence #6 (i.e., an example of the fourth sequence) in which any two of the Q sequences #5 are orthogonal to each other. Therefore, any two of the generated Q sequences #6 are orthogonal to the sequence #6.

It should be noted that the second sequence is generated in the same manner as the second sequence in the mode 1, and the fifth sequence is generated in the same manner as the third sequence in the mode 1, and the fourth sequence is generated and the mode is The first sequence is generated in a similar manner and will not be described here.

Mode 3

The transmitting device generates Q sixth sequences of length Z, and any two sixth sequences of the Q sixth sequences are orthogonal, and the Q sixth sequences are respectively Q antennas of the G antenna ports The reference signal sequence of the port, Q ≤ G.

Wherein, the Q sixth sequences are obtained by repeating R ₁ times according to Q first Zoffov-Chu ZC sequences of length Z ₁ , and any two first ZC sequences of the Q first ZC sequences are orthogonal .

Optionally, the transmitting device generates only one set of sequences (hereinafter referred to as sequence #a for ease of understanding and description), and each of the different scheduling units uses the sequence #a, wherein the set of sequences includes G A sequence of G reference signals corresponding to the antenna ports.

Optionally, the sending device generates a plurality of sets of sequences, each of the different scheduling units uses a set of sequences, wherein the set of sequences includes a sequence of G reference signals corresponding to the G antenna ports.

For example, three sets of sequences are generated (for ease of understanding and description, hereinafter referred to as sequence #a, sequence #b, and sequence #c), the first scheduling unit uses sequence #a, and the second scheduling unit uses sequence #b, The third scheduling unit uses sequence #c.

In the case where one reference signal is located on two symbols, the manner in which the reference signal sequence on each symbol is generated may be any one of the above-described sequence generation methods. Alternatively, two mutually adjacent REs in the time domain may be spread using a mutually orthogonal OCC sequence of length 2, wherein the manner of spreading is the same as that of the prior art.

In the embodiment of the present invention, the reference signal sequences of different antenna ports are orthogonally segmented by orthogonal sequence codes in one frequency domain unit or in one frequency domain unit group.

The method of transmitting a reference signal according to an embodiment of the present invention is described in detail below with reference to FIG. 8 , where the following line transmission (ie, the transmitting device is a network device and the receiving device is a user device).

FIG. 8 shows a schematic flow diagram of a method 100 of transmitting a reference signal in accordance with an embodiment of the present invention as described in terms of device interaction. The method 200 includes a network device and a user device. As shown in FIG. 8, the method 100 includes:

S101. The network device determines a first transmission time interval TTI resource block, where the first TTI resource block is M symbols are occupied in the time domain, and N frequency domain units are occupied in the frequency domain, and each of the N frequency domain units includes K consecutive subcarriers, where M≥1, N≥1 , K ≥ 2.

It should be noted that, in LTE and its corresponding evolved system, each frequency domain unit may be considered to include 12 consecutive subcarriers.

Optionally, the first TTI resource block is used to transmit a physical channel or a reference signal.

Optionally, the N frequency domain units occupied by the first TTI resource block in the frequency domain are consecutive.

Optionally, the N frequency domain units occupied by the first TTI resource block in the frequency domain are discontinuous.

Optionally, the network device determines that the frequency domain resource occupied by the TTI resource block is in a frequency domain unit group, and one frequency domain unit group may include N ₁ consecutive frequency domain units, where N ₁ ≥ 2. The N frequency domain units occupied by the first TTI resource block in the frequency domain include R ₁ frequency domain unit groups, and the R ₁ frequency domain unit groups may be continuous or non-contiguous in the frequency domain, R ₁ ≥1.

S102. The network device determines P reference signals, where the P reference signals are reference signals of P antenna ports, where P≥1.

Assume that the downlink reference signal can support up to G antenna ports, the corresponding antenna port number is port g to port (g+G-1), and g indicates the number of the first antenna port of the G antenna ports, and each antenna port Corresponds to a reference signal. Optionally, the network device determines the P reference signals, including determining the number of antenna ports of the reference signal transmitted on the first TTI resource block as P, determining an antenna port number corresponding to the P antenna ports, and determining the P antenna ports. a time domain position of each antenna port on the first TTI resource block, or a frequency domain location, or a corresponding reference signal sequence, etc., where P ≤ G. It should be noted that the network device determines that the port number of the P antenna ports is not limited to start from the first antenna port number. For example, if a maximum of four antenna ports can be supported, the network device determines to transmit two reference signals, and the two reference signals are used. The antenna port number corresponding to the signal may be port g and port (g+1); the antenna port number corresponding to the two reference signals may also be port (g+2) and port (g+3); the two reference signals The corresponding antenna port number can also be port (g+1) and port (g+3).

It should be noted that there is no sequential relationship between S102 and S101.

It should be understood that the time domain position, or the frequency domain position of the reference signal provided in the above embodiment, or the configuration manner of different antenna ports, or the sequence generation manner of the reference signal are applicable here.

Optionally, the time domain location, the frequency domain location, and the sequence of the reference signal of the reference signal corresponding to each port number of the G antenna ports are uniquely determined, and the network device and the user equipment can determine the reference signal before the transmission of the reference signal. Corresponding relationship, therefore, the network device determines P reference signals, and may determine, for the network device, the port number of the P antenna ports corresponding to the P reference signals.

Optionally, the relationship between the reference signal corresponding to each of the G antenna ports and its corresponding TTI resource block is predefined. For example, resource blocks #a, #b, #c are three time-domain contiguous resource blocks, wherein three reference signals are transmitted on resource block #a, and the antenna ports of the three reference signals are respectively g, (g+1) ), (g+2). The reference signal corresponding to port g is used for demodulation of the physical channel transmitted on resource block #a, and the reference signal corresponding to port (g+1) is used for demodulation of the physical channel transmitted on resource block #b, port (g+ 2) The corresponding reference signal is used for demodulation of the physical channel transmitted on resource block #c.

Optionally, the relationship between the reference signal corresponding to each of the G antenna ports and its corresponding TTI resource block is that the network device notifies the user equipment by signaling.

Optionally, the network device notifies the user equipment of the information of the at least one of the determined P reference signals. The information includes the number of antenna ports of the reference signal, or the antenna port number, or the time domain position of the reference signal, or the frequency domain position of the reference signal, or the sequence generation parameter of the reference signal, or the orthogonal code used by the reference signal. Wait.

Optionally, the network device notifies the user equipment of the determined information of the first TTI resource block. Optionally, the information of the first TTI resource block includes the number of symbols occupied by the first TTI resource block in the time domain, or the number of frequency domain units occupied in the frequency domain.

Optionally, the network device may select a pattern of a suitable reference signal according to a current channel state or a moving speed of the user equipment.

S103. The network device transmits the P reference signals to the at least one user equipment.

It should be noted that the network device transmits each of its corresponding P reference signals on each of the P antenna ports.

Optionally, the foregoing P reference signals determined by the network device may be sent to one user equipment, or may be sent to multiple user equipments.

Optionally, the P reference signals may be used for the first TTI resource block, and may also be used for other TTI resource blocks.

S104. The user equipment receives at least one of the P reference signals sent by the network device.

Optionally, the user equipment further receives indication information of an antenna port number sent by the network device.

S105. The user equipment performs at least one of the following according to the at least one reference signal: channel estimation, automatic gain control (AGC) adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, and radio resource control (Radio). Resource Management, RRM) Measurement, positioning measurement.

Optionally, the network device determines a second TTI resource block, where the second TTI resource block is a TTI resource block after the first TTI resource block, where the second TTI resource block and the first TTI resource block are The number of symbols occupied in the time domain may be the same or different;

The network device transmits a first physical channel on the first TTI resource block, and transmits a second physical channel on the second TTI resource block;

The reference signal corresponding to the one of the P antenna ports is used for demodulation of the first physical channel, where the number of layers of the first physical channel is equal to the number I of the antenna ports; and the P antenna ports are The reference signals corresponding to the J antenna ports are used for demodulation of the second physical channel, and the number of layers of the second physical channel is equal to the number of antenna ports J, 1≤I≤P, 1≤J≤P.

In the embodiment of the present invention, the reference signal for demodulating the first physical channel (assuming there are one) and the reference signal for demodulating the second physical channel (assuming that there are J) may be in the same TTI. transmission. For example, in the first TTI, the network device sends P reference signals and a first physical channel to the user equipment, where one of the P reference signals is used for demodulation of the first physical channel, and J is used for the first Demodulation of two physical channels. Within the second TTI, the network device transmits a second physical channel to the user equipment.

It should be noted that the first physical channel and the second physical channel may be physical channels of the same user equipment, or may be physical channels of different user equipments. One of the P antenna ports and the J antenna ports of the P antenna ports may be the same antenna port, or may be different antenna ports, or may be partially identical antenna ports.

Optionally, the first physical channel and the second physical channel are sent to the same user equipment, where the antenna port corresponding to the one reference signal and the antenna port corresponding to the J reference signals may be the same or different. For the user equipment, the first TTI receives the first physical channel and the I reference signals for demodulating the first physical channel and the J reference signals for demodulating the second physical channel, so the user equipment can Demodulating the first physical channel according to the one reference signal, and after receiving the second physical channel in the second TTI, according to the J reference for the second physical channel demodulation received in the first TTI The signal demodulates the second physical channel.

Optionally, the first physical channel is sent to the user equipment 1, and the second physical channel is sent to the user equipment 2. The antenna port corresponding to the one reference signal is different from the antenna port corresponding to the J reference signals. For the user equipment 1, the first physical channel and the I reference signals for demodulating the first physical channel are received at the first TTI, and therefore, the user equipment 1 can according to the I reference The signal demodulates the first physical channel; for the user equipment 2, the J reference signals for demodulating the second physical channel are received at the first TTI, and therefore, after the second TTI receives the second physical channel The user equipment 2 demodulates the second physical channel according to the J reference signals received on the first TTI.

Optionally, at least one of the P reference signals does not carry precoding information.

For a user equipment, optionally, the physical channel or reference signal on the first TTI resource block carries the same precoding matrix information. Optionally, the N frequency domain units of the first TTI resource block include R ₁ frequency domain unit groups, where each frequency domain unit group includes N ₁ consecutive frequency domain units, and the N ₁ consecutive The physical channel or the reference signal on the frequency domain unit carries the same precoding matrix information, and the different frequency domain unit groups may carry the same precoding matrix information, and may also carry different precoding matrix information.

In the prior art, the downlink demodulation reference signal is usually configured on the last two symbols of a time slot, and the channel can be demodulated only after the reference signal is received. Therefore, the method for transmitting a reference signal provided by the embodiment of the present invention can shorten the delay of downlink physical channel demodulation.

The method for transmitting a reference signal according to an embodiment of the present invention is described below with reference to FIG. 9 in which the above line transmission (ie, the transmitting device is a UE and the receiving device is a network device).

9 shows a schematic flow diagram of a method 200 of transmitting a reference signal in accordance with an embodiment of the present invention as described in terms of device interaction. The method 200 includes a network device and a user device. As shown in FIG. 9, the method 200 includes:

S201. The network device sends the indication information to the user equipment, where the indication information is used to indicate the P reference signals or the first TTI resource block used by the user equipment for uplink transmission.

The P reference signals are reference signals of P antenna ports, and P≥1.

It should be noted that, in all embodiments of the present invention, all indication information may enable the network device to pass physical layer signaling or media access control (MAC) layer signaling or radio resource control (Radio Resource). Control, RRC) signaling is sent to the user equipment.

Optionally, in all the embodiments of the present invention, all the indication information may be sent by the network device to the user equipment by using the carrier or the non-local carrier.

Assume that the uplink reference signal can support up to G antenna ports, the corresponding antenna port number is port g to port (g+G-1), and g indicates the number of the first antenna port of the G antenna ports, and each antenna port corresponds to A reference signal. Optionally, the network device determines that the P reference signals are used for the uplink transmission of the user equipment, and are sent to the user equipment by using the indication information, where the indication information may include the P The antenna port numbers corresponding to the antenna ports respectively determine a time domain position, or a frequency domain position, or a corresponding reference signal sequence of each of the P antenna ports on the first TTI resource block, where P≤G. It should be noted that the network device determines that the port number of the P antenna ports is not limited to start from the first antenna port number. For example, if a maximum of four antenna ports can be supported, the network device determines to transmit two reference signals, and the two reference signals are used. The antenna port number corresponding to the signal may be port g and port (g+1); the antenna port number corresponding to the two reference signals may also be port (g+2) and port (g+3); the two reference signals The corresponding antenna port number can also be port (g+1) and port (g+3).

Optionally, the time domain location, the frequency domain location, and the sequence of the reference signal of the reference signal corresponding to each port number of the G antenna ports are uniquely determined, and the network device and the user equipment can determine the reference signal before the transmission of the reference signal. Corresponding relationship, therefore, the indication information is used to indicate P reference signals used by the user equipment for uplink transmission, and may be port numbers of P antenna ports corresponding to the P reference signals.

Optionally, the relationship between the reference signal corresponding to each of the G antenna ports and its corresponding TTI resource block is predefined. For example, resource blocks #a, #b, #c are three time-domain contiguous resource blocks, wherein three reference signals are transmitted on resource block #a, and the antenna ports of the three reference signals are respectively g, (g+1) ), (g+2). The reference signal corresponding to port g is used for demodulation of the physical channel transmitted on resource block #a, and the reference signal corresponding to port (g+1) is used for demodulation of the physical channel transmitted on resource block #b, port (g+ 2) The corresponding reference signal is used for demodulation of the physical channel transmitted on resource block #c. Therefore, the indication information may be used to indicate a TTI resource block used by the user equipment for uplink transmission, and the user equipment may determine P antenna port numbers corresponding to the P reference signals according to the relationship between the reference signal port and the TTI resource block, thereby determining the P. Reference signals.

Optionally, the network device notifies the user equipment of the determined information of the P reference signals. The information includes the number of antenna ports of the reference signal, or the antenna port number, or the time domain position of the reference signal, or the frequency domain position of the reference signal, or the sequence generation parameter of the reference signal, or the orthogonal code used by the reference signal. Wait.

Optionally, the first TTI resource block occupies M symbols in the time domain, and occupies N frequency domain units in the frequency domain, where each of the N frequency domain units includes K consecutive subcarriers. Where M≥1, N≥1, K≥2. Further optionally, the N frequency domain units occupied by the first TTI resource block in the frequency domain are continuous. Or, the N frequency domain units occupied by the first TTI resource block in the frequency domain are discontinuous. Or, the N frequency domain units occupied by the first TTI resource block in the frequency domain include R ₁ frequency domain unit groups, and one frequency domain unit group may include N ₁ consecutive frequency domain units, where N ₁ ≥ 2, The R ₁ frequency domain unit group may be continuous or non-contiguous in the frequency domain, and R ₁ ≥1.

S202. The user equipment transmits the P reference signals to the network device on the first TTI resource block according to the indication information.

It should be noted that the user equipment sends a reference signal corresponding to the antenna port on each of the P antenna ports.

S203. The network device receives P reference signals sent by the user equipment.

S204. The network device performs at least one of the following according to the P reference signals: channel estimation, time-frequency synchronization, physical channel demodulation, and channel state information measurement.

Optionally, the user equipment further transmits a first physical channel on the first TTI resource block, where the number of layers of the first physical channel is less than or equal to the number P of antenna ports. The P reference signals are used for demodulation of the first physical channel, and the network device receives the first physical channel on the first TTI resource block, and the network device may demodulate the first physical channel according to the P reference signals.

Optionally, the network device further indicates a second TTI resource block used by the user equipment for uplink transmission, where the second TTI resource block is a TTI resource block after the first TTI resource block, where the second TTI resource block and the The number of symbols occupied by the first TTI resource block in the time domain may be the same or different. The user equipment transmits a second physical channel on the second TTI resource block, where the number of layers of the second physical channel is less than or equal to the number P of antenna ports. The network device may demodulate the second physical channel according to the P reference signals received on the first TTI.

Optionally, the physical channel or reference signal on the N frequency domain units of the first TTI resource block carries the same precoding matrix information. Optionally, the N frequency domain units of the first TTI resource block include R ₁ frequency domain unit groups, where each frequency domain unit group includes N ₁ consecutive frequency domain units, and the N ₁ consecutive The physical channel or the reference signal on the frequency domain unit carries the same precoding matrix information, and the different frequency domain unit groups may carry the same precoding matrix information, and may also carry different precoding matrix information.

According to the method for transmitting a reference signal according to the embodiment of the present invention, the overhead of the uplink reference signal can be reduced, and the delay of the uplink physical channel demodulation can be shortened.

The method of transmitting a reference signal according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 through 9, and an apparatus for transmitting a reference signal according to an embodiment of the present invention will be described below with reference to FIGS. 10 and 11.

FIG. 10 shows a schematic block diagram of an apparatus 300 for transmitting a reference signal in accordance with an embodiment of the present invention. As shown in FIG. 10, as shown in FIG. 10, the apparatus 300 includes a determining unit 310 and a transmitting unit 320, where

The determining unit 310 is configured to determine a first transmission time interval TTI resource block, where the first TTI resource block carries a first physical channel, where the first TTI resource block occupies M symbols in the time domain, and is occupied in the frequency domain. N frequency domain units, each of the N frequency domain units comprising K consecutive subcarriers, wherein M≥1, N≥1, K≥2;

The determining unit 310 is further configured to determine P reference signals, where the P reference signals are reference signals of P antenna ports, and at least one of the P reference signals is used to demodulate the first physical channel, P≥1;

The transmitting unit 320 is configured to receive, by the receiving device, the P reference signals, where an ith reference signal of the P reference signals is located in S frequency domain units of the N frequency domain units, and in the S Each frequency domain unit in the frequency domain unit occupies L subcarriers and is located on one of the M symbols, where 1≤S≤N, 1≤L<K.

Optionally, as an embodiment, the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups are discretely distributed in the frequency domain unit to which the frequency domain unit belongs. Each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L/2).

Optionally, as an embodiment, the ith reference signal is located on the first symbol of the M symbols, or

The ith reference signal is located on the mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n=ceil(M/ 2), ceil () means round up, or

The ith reference signal is located on a symbol other than the last symbol of the M symbols.

Optionally, as an embodiment, the ith reference signal of the P reference signals includes Z. The element 300, Z=S·L, the device 300 for transmitting a reference signal further includes:

The first generating unit 330 is configured to generate Q first sequences of length Z, where any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are respectively in the P antenna ports. Reference signal sequence of Q antenna ports, Q≤P, wherein the Q first sequences are obtained according to a second sequence of length Z and a third sequence of length L, and any of the Q third sequences The two third sequences are orthogonal.

Optionally, as an embodiment, the Q third sequences are obtained by Q orthogonal mask OCC sequences of length n ₁ , and n ₁ is an even number less than or equal to L, or

The Q third sequence is obtained by Q W sequences of length n ₂ , and n ₂ is an integer less than or equal to L, and the W sequence is

n = 0, 1, ... m ₁ -1, where m ₁ represents the length of the W sequence and n _CS represents the available cyclic shift, Q ≤ n _CS .

Optionally, as an embodiment, the N frequency domain units are divided into R ₁ first frequency domain unit groups, and each of the R ₁ first frequency domain unit groups includes N ₁ consecutive groups. a frequency domain unit, the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the second frequency domain unit groups of the R ₁ second frequency domain unit groups includes S ₁ frequency domain units And the R ₁ first frequency domain unit group and the R ₁ second frequency domain unit group are in one-to-one correspondence, N=N ₁ ·R ₁ , S=S ₁ ·R ₁ ,

The S ₁ frequency domain unit is the N ₁ consecutive frequency domain units, where S ₁ =N ₁ , or

The S ₁ frequency domain unit is discretely distributed in the N ₁ consecutive frequency domain units, where N ₁ ≥3, 2≤S ₁ ≤ceil(N ₁ /2), and ceil() indicates rounding up, or

The S ₁ frequency domain unit is a frequency domain unit located at a center position of the N ₁ consecutive frequency domain units, where N ₁ ≥ ₃ , ₁ ≤ S ₁ ≤ N ₁ -2.

Optionally, as an embodiment, the i th reference signal of the P reference signals includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Each of the R ₁ sequence units comprises Z ₁ elements, the N sequence units comprising Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , the apparatus 300 for transmitting a reference signal Also includes:

The second generating unit 340 is configured to generate Q fourth sequences of length Z, and any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are respectively in the P antenna ports. a reference signal sequence of Q antenna ports, Q ≤ P, wherein the Q fourth sequences are obtained according to a second sequence of length Z and a fifth sequence of length Z ₁ , in the Q fifth sequence Any two fifth sequences are orthogonal.

The third generating unit 350 is configured to generate Q sixth sequences of length Z, and any two sixth sequences of the Q sixth sequences are orthogonal, and the Q sixth sequences are respectively in the P antenna ports. Reference signal sequence of Q antenna ports, Q≤P, wherein the Q sixth sequences are repeatedly obtained according to Q first ZC sequences of length Z ₁ , and any two of the Q first ZC sequences are first The ZC sequences are orthogonal.

Optionally, as an embodiment, the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and are occupied in each of the N frequency domain units. The subcarriers are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the N frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy the same subcarriers in each of the N frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the N frequency domain units.

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.

Optionally, as an embodiment, the determining unit 310 is further configured to determine a second TTI resource block, where the second TTI resource block is a TTI resource block after the first TTI resource block;

The transmitting unit 320 is specifically configured to transmit a first physical channel on the first TTI resource block, and transmit a second physical channel on the second TTI resource block;

The reference signals corresponding to the one antenna port of the P antenna ports are used for demodulation of the first physical channel, and the J reference signals corresponding to the J antenna ports of the P antenna ports are used for the Demodulation of the second physical channel, P ≥ 1, 1 ≤ I ≤ P, 1 ≤ J ≤ P.

The apparatus 300 for transmitting a reference signal according to an embodiment of the present invention may correspond to a transmitting apparatus in a method of transmitting a reference signal according to an embodiment of the present invention, and each unit in the apparatus 300 and the other operations and/or functions described above are respectively The various steps performed by the sending device in FIG. 8 are implemented, and are not described herein for brevity.

Therefore, the apparatus for transmitting a reference signal in the embodiment of the present invention provides a short TTI transmission scenario. The configuration pattern of the reference signal and the reference signal sequence can support the transmission of the reference signal in the short TTI transmission scenario.

FIG. 11 shows a schematic block diagram of an apparatus 400 for transmitting a reference signal in accordance with another embodiment of the present invention. As shown in FIG. 11, as shown in FIG. 11, the device 400 includes a receiving unit 410 and a processing unit 420, where

The receiving unit 410 is configured to receive at least one of the P reference signals sent by the sending device, where the P reference signals are reference signals of P antenna ports, where the P reference signals are carried in the first transmission time interval. On the TTI resource block, the first TTI resource block occupies M symbols in the time domain, and occupies N frequency domain units in the frequency domain, where each of the N frequency domain units includes K consecutive Subcarriers, where P≥1, M≥1, N≥1, K≥2, the i-th reference signal of the at least one reference signal is located in S frequency domain units in the N frequency domain units And occupying L subcarriers in each of the S frequency domain units and located on one of the M symbols, where 1≤S≤N, 1≤L<K;

The processing unit 420 is configured to perform at least one of the following according to the at least one reference signal: channel estimation, automatic gain control AGC adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, radio resource management RRM measurement, and positioning measurement .

Optionally, as an embodiment, the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups are discrete within the frequency domain unit to which the frequency domain unit belongs. Distribution, each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L/2).

Optionally, as an embodiment, the ith reference signal of the at least one reference signal is located on one of the M symbols, and includes:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on an mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n= Ceil(M/2),ceil() means round up; or

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes Z elements, Z=S·L, and the apparatus further includes:

a first generating unit, configured to generate a first sequence of length Z for the ith reference signal, where The first sequence is obtained from a second sequence of length Z and a third sequence of length L.

Optionally, as an embodiment, the N frequency domain units are divided into R ₁ first frequency domain unit groups, and each of the R ₁ first frequency domain unit groups includes N ₁ Continuing frequency domain units, the S frequency domain units are divided into R ₁ second frequency domain unit groups, and each of the R ₁ second frequency domain unit groups includes S ₁ a frequency domain unit, the R ₁ first frequency domain unit groups and the R ₁ second frequency domain unit groups are in one-to-one correspondence, N=N ₁ ·R ₁ , S=S ₁ ·R ₁ ,

The S ₁ frequency domain unit is the N ₁ consecutive frequency domain units, where S ₁ =N ₁ ; or

The S ₁ frequency domain units are discretely distributed in the N ₁ consecutive frequency domain units, where N ₁ ≥3, 2≤S ₁ ≤ceil(N ₁ /2), and ceil() indicates rounding up ,or

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes R ₁ sequence units, and the R ₁ sequence units and the R ₁ second frequency domain unit groups are one by one Correspondingly, each of the R ₁ sequence units comprises Z ₁ elements, the N sequence units comprise Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , The device also includes:

A second generating unit configured to reference the i-th signal generating fourth sequence of length Z, wherein Z according to the length of the fourth sequence to obtain a fifth _sequence of a second sequence and length Z is.

Third generating means for said i-th length of the sixth reference signal generating sequence Z, wherein the sixth sequence of the first rank and file according to the length Z of the doffer ₁ - Chu ZC sequence repeats obtained.

Optionally, as an embodiment, the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and are in each of the S frequency domain units. The occupied subcarriers are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are the same as the subcarriers occupied in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are in the The subcarriers occupied in each of the frequency domain units are different.

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.

Optionally, as an embodiment, the receiving unit is further configured to receive a first physical channel, where the first physical channel is carried on the first TTI resource block, and the first physical channel corresponds to the P One antenna port in the antenna port;

The device also includes:

And a demodulation unit, configured to demodulate the first physical channel according to a reference signal corresponding to the one antenna port.

Optionally, as an embodiment, the receiving unit is further configured to receive a second physical channel, where the second physical channel is carried on a second TTI resource block, and the second TTI resource block is the first TTI a TTI resource block after the resource block, where the second physical channel corresponds to J antenna ports of the P antenna ports;

The receiving device demodulates the second physical channel according to a reference signal corresponding to J antenna ports of the P antenna ports, where 1≤J≤P.

The apparatus 400 for transmitting a reference signal according to an embodiment of the present invention may correspond to a receiving apparatus in a method of transmitting a reference signal according to an embodiment of the present invention, and each unit in the apparatus 400 and the other operations and/or functions described above are respectively The various steps performed by the receiving device in FIG. 8 are implemented, and are not described herein for brevity.

Therefore, the apparatus for transmitting a reference signal in the embodiment of the present invention provides a configuration pattern and a reference signal sequence of a reference signal in a short TTI transmission scenario, and can support transmission of a reference signal in a short TTI transmission scenario.

The apparatus for transmitting a reference signal according to an embodiment of the present invention has been described in detail above with reference to FIGS. 10 and 11. Hereinafter, an apparatus for transmitting a reference signal according to an embodiment of the present invention will be described in detail with reference to FIGS. 12 and 13.

FIG. 12 shows a schematic block diagram of an apparatus 500 for transmitting a reference signal in accordance with an embodiment of the present invention. As shown in FIG. 12, the apparatus 500 includes a processor 510, a transceiver 520, a memory 530, and a bus system 540, wherein the processor 510, the transceiver 520, and the memory 530 can be connected by a bus system 540, which can be used for Storing instructions, the processor 510 is configured to execute instructions stored by the memory 530,

And determining, by the first TTI resource block, a first physical channel, where the first TTI resource block occupies M symbols in the time domain, and occupies N in the frequency domain. a frequency domain unit, each of the N frequency domain units comprising K consecutive subcarriers, wherein M≥1, N≥1, K≥2;

For determining P reference signals, wherein the P reference signals are reference signals of P antenna ports, P≥1;

The control transceiver 520 is configured to transmit the P reference signals, where an ith reference signal of the P reference signals is located in S frequency domain units of the N frequency domain units, and in the S frequency domain Each frequency domain unit in the unit occupies L subcarriers and is located on one of the M symbols, where 1≤S≤N, 1≤L<K.

Optionally, as an embodiment, the i th reference signal of the P reference signals includes Z elements, Z=S·L, and the processor 510 is specifically configured to generate Q first sequences of length Z, Any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are reference signal sequences of Q antenna ports of the P antenna ports, respectively, Q≤P, wherein the Q A sequence is obtained from a second sequence of length Z and a third sequence of length L, and any two of the Q sequences are orthogonal.

Where m ₁ represents the length of the W sequence and n _CS represents the available cyclic shift, Q ≤ n _CS .

Optionally, as an embodiment, the i th reference signal of the P reference signals includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Each of the N ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , and the processor 510 is specifically used for Generating a fourth sequence of Q lengths Z, and any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are reference signal sequences of Q antenna ports of the P antenna ports respectively Q ≤ P, wherein the Q fourth sequences are obtained according to a second sequence of length Z and a fifth sequence of length Z ₁ , and any two of the Q fifth sequences are orthogonal .

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , and the processor 510 is specifically used for Generating a sixth sixth sequence of length Z, wherein any two sixth sequences of the Q sixth sequences are orthogonal, and the Q sixth sequences are reference signal sequences of Q antenna ports of the P antenna ports respectively Q ≤ P, wherein the Q sixth sequences are repeatedly obtained according to Q first ZC sequences of length Z ₁ , and any two first ZC sequences of the Q first ZC sequences are orthogonal.

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.

It should be understood that, in the embodiment of the present invention, the processor 510 may be a central processing unit ("CPU"), and the processor 510 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 530 can include read only memory and random access memory and provides instructions and data to the processor 510. A portion of processor 510 may also include a non-volatile random access memory. For example, processor 510 can also store information of the type of device.

The bus system 540 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 540 in the figure.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 510 or an instruction in a form of software. The steps of the method for transmitting a reference signal disclosed in the embodiment of the present invention may be directly implemented by a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in memory 530, and processor 510 reads the information in memory 530 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.

Apparatus 500 for transmitting a reference signal according to an embodiment of the present invention may correspond to the present invention a transmitting device in a method of transmitting a reference signal of an embodiment, and each unit in the device 500 and the other operations and/or functions described above respectively implement a corresponding flow performed by the network device in FIG. 8 (or FIG. 9), Concise, no longer repeat here.

FIG. 13 shows a schematic block diagram of an apparatus 600 for transmitting a reference signal in accordance with an embodiment of the present invention. As shown in FIG. 13, the device 600 includes a processor 610, a transceiver 620, a memory 630, and a bus system 640, wherein the processor 610, the transceiver 620, and the memory 630 can be connected by a bus system 640, which can be used for Storing instructions, the processor 610 is configured to execute the instructions stored in the memory 630, to control the transceiver 620 to receive at least one of the P reference signals sent by the transmitting device, where the P reference signals are P antenna ports. a reference signal, the P reference signals are carried on a first transmission time interval TTI resource block, where the first TTI resource block occupies M symbols in the time domain and occupies N frequency domain units in the frequency domain, Each of the N frequency domain units includes K consecutive subcarriers, where P≥1, M≥1, N≥1, K≥2, the ith reference in the at least one reference signal The signal is located on the S frequency domain units of the N frequency domain units, and occupies L subcarriers in each of the S frequency domain units, and is located in one of the M symbols Above, wherein 1 ≤ S ≤ N, 1 ≤ L < K;

And performing at least one of: channel estimation, automatic gain control AGC adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, radio resource management RRM measurement, and positioning measurement according to the at least one reference signal.

Optionally, as an embodiment, the ith reference signal of the at least one reference signal is located on one of the M symbols, including:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on the mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n=ceil(M/ 2), ceil () means round up; or

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes Z elements, Z=S·L, and the processor 610 is specifically configured to generate a length Z for the ith reference signal. A first sequence, wherein the first sequence is derived from a second sequence of length Z and a third sequence of length L.

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , and the processor 610 is specifically used for for the i-th reference signal to generate a fourth sequence of length Z, wherein, according to the length of the fourth sequence and a second sequence of length Z is Z ₁ to obtain a fifth sequence.

Optionally, as an embodiment, the ith reference signal of the at least one reference signal includes R ₁ sequence units, and the R ₁ sequence units are in one-to-one correspondence with the R ₁ second frequency domain unit groups. Each of the R ₁ sequence units includes Z ₁ elements, and the N sequence units include Z elements, Z ₁ =S ₁ ·L, Z=R ₁ ·Z ₁ , and the processor 610 is specifically used for for the i-th reference signal to generate a sixth sequence Z length, wherein the sixth sequence according to the length of a first of the adjuvant doffer Z ₁ - Chu ZC sequence repeats obtained.

Optionally, as an embodiment, the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and are occupied in each of the S frequency domain units. The subcarriers are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and at the S frequency The subcarriers occupied in each frequency domain unit in the domain unit are different, or

The jth reference signal and the kth reference signal are located on different symbols and occupy the same subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units.

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.

Optionally, as an embodiment, the transceiver 620 is specifically configured to receive a first physical channel, where the first physical channel is carried on the first TTI resource block, where the first physical channel corresponds to the P antenna ports. I antenna port;

The processor 620 is specifically configured to demodulate the first physical channel according to a reference signal corresponding to one of the P antenna ports, where 1≤I≤P.

Optionally, as an embodiment, the transceiver 620 is specifically configured to receive a second physical channel, where the second physical channel is carried on a second TTI resource block, where the second TTI resource block is the first TTI resource block. a TTI resource block, the second physical channel corresponding to J antenna ports of the P antenna ports;

The processor 620 is specifically configured to demodulate the second physical channel according to a reference signal corresponding to the J antenna ports of the P antenna ports, where 1≤J≤P.

It should be understood that, in the embodiment of the present invention, the processor 610 may be a central processing unit ("CPU"), and the processor 610 may also be other general-purpose processors, digital signal processors (DSPs). , an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, and the like. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 630 can include read only memory and random access memory and provides instructions and data to the processor 610. A portion of processor 610 may also include a non-volatile random access memory. For example, the processor 610 can also store information of the device type.

The bus system 640 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 640 in the figure.

In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in a form of software. The steps of the method for transmitting a reference signal disclosed in the embodiments of the present invention may be directly implemented as hardware processor execution completion, or using a hard processor. The combination of the piece and the software module is completed. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 630, and the processor 610 reads the information in the memory 630 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

The apparatus 600 for transmitting a reference signal according to an embodiment of the present invention may correspond to a receiving apparatus in a method of transmitting a reference signal according to an embodiment of the present invention, and each unit in the apparatus 600 and the other operations and/or functions described above For the sake of brevity, the corresponding processes performed by the user equipment in FIG. 8 (or FIG. 9) are not described here.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention. The implementation process constitutes any limitation.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the implementations disclosed herein can be implemented in electronic hardware, or in combination with computer hardware and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, may be located in one place. Or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (RAM), a random access memory (ROM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method of transmitting a reference signal, the method comprising:

The transmitting device determines a first transmission time interval TTI resource block, where the first TTI resource block occupies M symbols in the time domain, and occupies N frequency domain units in the frequency domain, each of the N frequency domain units The frequency domain unit includes K consecutive subcarriers, wherein M≥1, N≥1, K≥2;

The transmitting device determines P reference signals, where the P reference signals are reference signals of P antenna ports, where P≥1;

Transmitting, by the sending device, the P reference signals, where an ith reference signal of the P reference signals is located on S frequency domain units in the N frequency domain units, and in the S Each of the frequency domain units occupies L subcarriers, and the ith reference signal is located on one of the M symbols, where 1≤S≤N, 1≤L<K.
The method according to claim 1, wherein the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups are in the frequency to which they belong. Each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L) /2).
The method according to claim 1 or 2, wherein the i-th reference signal of the P reference signals is located on one of the M symbols, comprising:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on an mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n= Ceil(M/2),ceil( ) means round up; or

The ith reference signal is located on a symbol other than the last symbol of the M symbols.
The method according to any one of claims 1 to 3, wherein the N frequency domain units are divided into R 1 first frequency domain unit groups, and the R 1 first frequency domain unit groups are Each frequency domain unit group includes N 1 consecutive frequency domain units, and the S frequency domain units are divided into R 1 second frequency domain unit groups, and each of the R 1 second frequency domain unit groups second cell group comprising frequency-domain frequency-domain units S 1, one of R 1 and the first frequency domain unit group of R 1 a second set of frequency-domain units correspond, N = N 1 · R 1 , S=S 1 ·R 1 ,

The S 1 frequency domain unit is the N 1 consecutive frequency domain units, where S 1 =N 1 , or

The S 1 frequency domain units are discretely distributed in the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 2 ≤ S 1 ≤ ceil (N 1 /2), and ceil ( ) indicates rounding up ,or

The S 1 frequency domain unit is a frequency domain unit located at a center position of the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 1 ≤ S 1 ≤ N 1 -2.
The method according to any one of claims 1 to 4, wherein the i-th reference signal of the P reference signals comprises Z elements, Z=S·L, the method further comprising:

The transmitting device generates Q first sequences of length Z, and any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are respectively Q of the P antenna ports. Reference signal sequence of antenna ports, Q≤P,

The Q first sequence is obtained according to a second sequence of length Z and a third sequence of length L, and any two third sequences of the Q third sequences are orthogonal.
The method according to claim 5, wherein said Q third sequences are obtained by Q orthogonal mask OCC sequences of length n 1 , and n 1 is an even number less than or equal to L, or

The Q third sequences are obtained by Q W sequences of length n 2 , and n 2 is an integer less than or equal to L, and the W sequence is

Where m 1 represents the length of the W sequence and n CS represents the available cyclic shift, Q ≤ n CS .
The method according to claim 4, wherein the i-th reference signal of the P reference signals comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The method further includes:

The transmitting device generates Q fourth sequences of length Z, and any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are respectively Q of the P antenna ports Reference signal sequence of antenna ports, Q≤P;

The Q fourth sequence is obtained according to a second sequence of length Z and a Q sequence of length Z 1 , and any two of the Q fifth sequences are orthogonal.
The method according to claim 4, wherein the i-th reference signal of the P reference signals comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The method further includes:

The transmitting device generates Q sixth sequences of length Z, in the Q sixth sequences Any two sixth sequences are orthogonal, and the Q sixth sequences are respectively reference signal sequences of Q antenna ports of the P antenna ports, Q≤P;

The Q sixth sequence is repeatedly obtained according to the Q first Zoffov-Chu ZC sequences of length Z 1 , and any two of the Q first ZC sequences are orthogonal.
The method according to any one of claims 1 to 8, wherein the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and at the S frequency The subcarriers occupied in each frequency domain unit in the domain unit are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are the same as the subcarriers occupied in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units,

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.
The method according to any one of claims 1 to 9, wherein the method further comprises:

The sending device determines a second TTI resource block, where the second TTI resource block is a TTI resource block after the first TTI resource block;

Transmitting, by the sending device, a first physical channel on the first TTI resource block, and transmitting a second physical channel on the second TTI resource block;

The reference signal corresponding to the one of the P antenna ports is used for demodulation of the first physical channel, and the reference signal corresponding to the J antenna ports of the P antenna ports is used for the Demodulation of the second physical channel, P ≥ 1, 1 ≤ I ≤ P, 1 ≤ J ≤ P.
A method of transmitting a reference signal, the method comprising:

The receiving device receives at least one of the P reference signals sent by the sending device, where the P reference signals are reference signals of P antenna ports, and the P reference signals are carried on the first transmission time interval TTI resource block. The first TTI resource block occupies M symbols in the time domain, and occupies N frequency domain units in the frequency domain, where each of the N frequency domain units includes K consecutive subcarriers. Wherein, P≥1, M≥1, N≥1, K≥2, the ith reference signal of the at least one reference signal is located on the S frequency domain units in the N frequency domain units, and Each of the S frequency domain units occupies L subcarriers in each frequency domain unit, and is located in the M symbols In a symbol, where 1 ≤ S ≤ N, 1 ≤ L < K;

The receiving device performs at least one of the following according to the at least one reference signal: channel estimation, automatic gain control AGC adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, radio resource management RRM measurement, and positioning measurement.
The method according to claim 11, wherein the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups are in the frequency to which they belong. Each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L) /2).
The method according to claim 11 or 12, wherein the i-th reference signal of the at least one reference signal is located on one of the M symbols, comprising:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on an mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n= Ceil(M/2),ceil( ) means round up; or

The ith reference signal is located on a symbol other than the last symbol of the M symbols.
The method according to any one of claims 11 to 13, wherein the N frequency domain units are divided into R 1 first frequency domain unit groups, and the R 1 first frequency domain unit groups are Each frequency domain unit group includes N 1 consecutive frequency domain units, and the S frequency domain units are divided into R 1 second frequency domain unit groups, and each of the R 1 second frequency domain unit groups second cell group comprising frequency-domain frequency-domain units S 1, one of R 1 and the first frequency domain unit group of R 1 a second set of frequency-domain units correspond, N = N 1 · R 1 , S=S 1 ·R 1 ,

The S 1 frequency domain unit is the N 1 consecutive frequency domain units, where S 1 =N 1 ; or

The S 1 frequency domain units are discretely distributed in the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 2 ≤ S 1 ≤ ceil (N 1 /2), and ceil ( ) indicates rounding up ,or

The S 1 frequency domain unit is a frequency domain unit located at a center position of the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 1 ≤ S 1 ≤ N 1 -2.
The method according to any one of claims 11 to 14, wherein the i-th reference signal of the at least one reference signal comprises Z elements, Z=S·L, the method further comprising:

The receiving device generates a first sequence of length Z for the ith reference signal, where The first sequence is obtained from a second sequence of length Z and a third sequence of length L.
The method according to claim 14, wherein the i-th reference signal of the at least one reference signal comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The method further includes:

The receiving apparatus is the i-th reference signal to generate a fourth sequence of length Z, wherein Z according to the length of the fourth sequence to obtain a fifth sequence of a second sequence and length Z is.
The method according to claim 14, wherein the i-th reference signal of the at least one reference signal comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The method further includes:

The receiving apparatus is the i-th reference signal to generate a sixth sequence Z length, wherein the length of the sixth sequences according to a first adjuvant Astoria Z 1 - Chu ZC sequence repeats obtained.
The method according to any one of claims 11 to 17, wherein the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and at the S frequency The subcarriers occupied in each frequency domain unit in the domain unit are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are the same as the subcarriers occupied in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units,

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.
The method according to any one of claims 11 to 18, wherein the method further comprises:

The receiving device receives a first physical channel, where the first physical channel is carried on the first TTI resource block, and the first physical channel corresponds to one of the P antenna ports;

The receiving device demodulates the first physical channel according to a reference signal corresponding to one of the P antenna ports, where 1≤I≤P.
The method according to any one of claims 11 to 19, wherein the method further comprises:

The receiving device receives a second physical channel, where the second physical channel is carried on a second TTI resource block, and the second TTI resource block is a TTI resource block after the first TTI resource block, where the Two physical channels corresponding to J antenna ports of the P antenna ports;

The receiving device demodulates the second physical channel according to a reference signal corresponding to J antenna ports of the P antenna ports, where 1≤J≤P.
A device for transmitting a reference signal, comprising:

a determining unit, configured to determine a first transmission time interval TTI resource block, where the first TTI resource block occupies M symbols in a time domain, and occupies N frequency domain units in a frequency domain, where the N frequency domain units are Each frequency domain unit includes K consecutive subcarriers, where M≥1, N≥1, K≥2;

The determining unit is further configured to determine P reference signals, where the P reference signals are reference signals of P antenna ports, where P≥1;

a transmitting unit, configured to transmit the P reference signals on the first TTI resource block, where an ith one of the P reference signals is located in an S frequency of the N frequency domain units And on the domain unit, occupying L subcarriers in each of the S frequency domain units, and the i th reference signal is located on one of the M symbols, where 1≤S ≤ N, 1 ≤ L < K.
The apparatus according to claim 21, wherein the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups are in a frequency group Each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L) /2).
The apparatus according to claim 21 or 22, wherein the i-th reference signal of the P reference signals is located on one of the M symbols, comprising:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on an mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n= Ceil(M/2),ceil( ) means round up; or

The ith reference signal is located on a symbol other than the last symbol of the M symbols.
The apparatus according to any one of claims 21 to 23, wherein the N frequency domain units are divided into R 1 first frequency domain unit groups, and the R 1 first frequency domain unit groups are Each frequency domain unit group includes N 1 consecutive frequency domain units, and the S frequency domain units are divided into R 1 second frequency domain unit groups, and each of the R 1 second frequency domain unit groups second cell group comprising frequency-domain frequency-domain units S 1, one of R 1 and the first frequency domain unit group of R 1 a second set of frequency-domain units correspond, N = N 1 · R 1 , S=S 1 ·R 1 ,

The S 1 frequency domain unit is the N 1 consecutive frequency domain units, where S 1 =N 1 ; or

The S 1 frequency domain units are discretely distributed in the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 2 ≤ S 1 ≤ ceil (N 1 /2), and ceil ( ) indicates rounding up ;or

The S 1 frequency domain unit is a frequency domain unit located at a center position of the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 1 ≤ S 1 ≤ N 1 -2.
The device according to any one of claims 21 to 24, wherein the i-th reference signal of the P reference signals comprises Z elements, Z=S·L, and the device further comprises:

a first generating unit, configured to generate Q first sequences of length Z, where any two first sequences of the Q first sequences are orthogonal, and the Q first sequences are respectively the P antennas Reference signal sequence of Q antenna ports in the port, Q≤P,

The Q first sequence is obtained according to a second sequence of length Z and a third sequence of length L, and any two third sequences of the Q third sequences are orthogonal.
The apparatus according to claim 25, wherein said Q third sequences are obtained by Q orthogonal mask OCC sequences of length n 1 , n 1 being an even number less than or equal to L, or

The Q third sequences are obtained by Q W sequences of length n 2 , and n 2 is an integer less than or equal to L, and the W sequence is

Where m 1 represents the length of the W sequence and n CS represents the available cyclic shift, Q ≤ n CS .
The apparatus according to claim 24, wherein the i-th reference signal of the P reference signals comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The device further comprises:

a second generating unit, configured to generate Q fourth sequences of length Z, any two of the Q fourth sequences are orthogonal, and the Q fourth sequences are respectively the P antennas Reference signal sequence of Q antenna ports in the port, Q≤P,

The Q fourth sequence is obtained according to a second sequence of length Z and a Q sequence of length Z 1 , and any two of the Q fifth sequences are orthogonal.
The apparatus according to claim 24, wherein the i-th reference signal of the P reference signals comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The device further comprises:

a third generating unit, configured to generate Q sixth sequences of length Z, where any two sixth sequences of the Q sixth sequences are orthogonal, and the Q sixth sequences are respectively the P antennas Reference signal sequence of Q antenna ports in the port, Q≤P,

The Q sixth sequence is repeatedly obtained according to the Q first Zoffov-Chu ZC sequences of length Z 1 , and any two of the Q first ZC sequences are orthogonal.
The apparatus according to any one of claims 21 to 28, wherein the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and at the S frequency The subcarriers occupied in each frequency domain unit in the domain unit are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are the same as the subcarriers occupied in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units,

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.
A device according to any one of claims 21 to 29, wherein

The determining unit is further configured to determine a second TTI resource block, where the second TTI resource block is a TTI resource block after the first TTI resource block;

The transmitting unit is specifically configured to transmit a first physical channel on the first TTI resource block, and transmit a second physical channel on the second TTI resource block;

The reference signal corresponding to the one of the P antenna ports is used for demodulation of the first physical channel, and the reference signal corresponding to the J antenna ports of the P antenna ports is used for the Demodulation of the second physical channel, P ≥ 1, 1 ≤ I ≤ P, 1 ≤ J ≤ P.
A device for transmitting a reference signal, the device comprising:

a receiving unit, configured to receive at least one of the P reference signals sent by the sending device No. The P reference signals are reference signals of P antenna ports, where the P reference signals are carried on a first transmission time interval TTI resource block, and the first TTI resource block occupies M symbols in a time domain. N frequency domain units are occupied in the frequency domain, and each of the N frequency domain units includes K consecutive subcarriers, where P≥1, M≥1, N≥1, K≥ 2. The i-th reference signal of the at least one reference signal is located on the S frequency domain units of the N frequency domain units, and occupies L in each frequency domain unit in the S frequency domain units. a subcarrier, and located on one of the M symbols, wherein 1≤S≤N, 1≤L<K;

And a processing unit, configured to perform at least one of: channel estimation, automatic gain control AGC adjustment, time-frequency synchronization, physical channel demodulation, channel state information measurement, radio resource management RRM measurement, and positioning measurement according to the at least one reference signal.
The apparatus according to claim 31, wherein the L subcarriers of each of the S frequency domain units are divided into R subcarrier groups, and the R subcarrier groups belong to a frequency Each of the R subcarrier groups includes C consecutive subcarriers, where L≥2, C=L/R, 2≤R≤L, 1≤C≤(L) /2).
The apparatus according to claim 31 or 32, wherein the i-th reference signal of the at least one reference signal is located on one of the M symbols, comprising:

The ith reference signal is located on a first one of the M symbols; or

The ith reference signal is located on an mth symbol of the M symbols, wherein the mth symbol is one of the first n symbols of the M symbols, where n= Ceil(M/2),ceil( ) means round up; or

The ith reference signal is located on a symbol other than the last symbol of the M symbols.
The apparatus according to any one of claims 31 to 33, wherein the N frequency domain units are divided into R 1 first frequency domain unit groups, and the R 1 first frequency domain unit groups are Each frequency domain unit group includes N 1 consecutive frequency domain units, and the S frequency domain units are divided into R 1 second frequency domain unit groups, and each of the R 1 second frequency domain unit groups second cell group comprising frequency-domain frequency-domain units S 1, one of R 1 and the first frequency domain unit group of R 1 a second set of frequency-domain units correspond, N = N 1 · R 1 , S=S 1 ·R 1 ,

The S 1 frequency domain unit is the N 1 consecutive frequency domain units, where S 1 =N 1 ; or

The S 1 frequency domain units are discretely distributed in the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 2 ≤ S 1 ≤ ceil (N 1 /2), and ceil ( ) indicates rounding up ,or

The S 1 frequency domain unit is a frequency domain unit located at a center position of the N 1 consecutive frequency domain units, where N 1 ≥ 3 , 1 ≤ S 1 ≤ N 1 -2.
The apparatus according to any one of claims 31 to 34, wherein the i-th reference signal of the at least one reference signal comprises Z elements, Z=S·L, the device further comprising:

The first generating unit generates a first sequence of length Z for the ith reference signal, wherein the first sequence is obtained according to a second sequence of length Z and a third sequence of length L.
The apparatus according to claim 34, wherein the i-th reference signal of the at least one reference signal comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The device further comprises:

A second generating unit configured to reference the i-th signal generating fourth sequence of length Z, wherein Z according to the length of the fourth sequence to obtain a fifth sequence of a second sequence and length Z is.
The apparatus according to claim 34, wherein the i-th reference signal of the at least one reference signal comprises R 1 sequence units, the R 1 sequence units and the R 1 second frequency domains The unit groups are in one-to-one correspondence, each of the R 1 sequence units includes Z 1 elements, and the N sequence units include Z elements, Z 1 =S 1 ·L, Z=R 1 ·Z 1. The device further comprises:

Third generating means for said i-th length of the sixth reference signal generating sequence Z, wherein the sixth sequence of the first rank and file according to the length Z of the doffer 1 - Chu ZC sequence repeats obtained.
The method according to any one of claims 31 to 37, wherein the jth reference signal and the kth reference signal of the P reference signals are located on the same symbol and at the S frequency The subcarriers occupied in each frequency domain unit in the domain unit are the same, or

The jth reference signal and the kth reference signal are located on the same symbol and occupy different subcarriers in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and are the same as the subcarriers occupied in each of the S frequency domain units, or

The jth reference signal and the kth reference signal are located on different symbols and occupy different subcarriers in each of the S frequency domain units,

Among them, 1 ≤ j ≤ P, 1 ≤ k ≤ P, j ≠ k.
A device according to any one of claims 31 to 38, wherein

The receiving unit is further configured to receive a first physical channel, where the first physical channel is carried on the first TTI resource block, and the first physical channel corresponds to one of the P antenna ports;

The device also includes:

And a demodulation unit, configured to demodulate the first physical channel according to a reference signal corresponding to the one antenna port.
A device according to any one of claims 31 to 39, wherein

The receiving unit is further configured to receive a second physical channel, where the second physical channel is carried on a second TTI resource block, and the second TTI resource block is a TTI resource block after the first TTI resource block, The second physical channel corresponds to J antenna ports of the P antenna ports;

The receiving device demodulates the second physical channel according to a reference signal corresponding to J antenna ports of the P antenna ports, where 1≤J≤P.