CN107786313B

CN107786313B - Reference signal configuration method and related equipment

Info

Publication number: CN107786313B
Application number: CN201610742377.3A
Authority: CN
Inventors: 刘建琴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-08-27
Filing date: 2016-08-27
Publication date: 2020-10-09
Anticipated expiration: 2036-08-27
Also published as: CN107786313A; WO2018040957A1

Abstract

The embodiment of the invention discloses a method for configuring a reference signal, which comprises the following steps: transmitting at least one first type of reference signal on a first subframe, wherein the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group; and sending the second type of reference signal on a second subframe, and informing a user terminal of the position of a time domain resource and/or a frequency domain resource of the second type of reference signal on the second subframe, wherein the second type of reference signal is placed on the position of the time domain resource and/or the position of the frequency domain resource on the second subframe. The embodiment of the invention also discloses a base station and user equipment. By adopting the embodiment of the invention, the pilot frequency overhead can be reduced, and the rapid tracking of beam level synchronization on the high-frequency carrier wave can be realized.

Description

Reference signal configuration method and related equipment

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to a method for configuring a reference signal and a related device.

Background

Modern communication systems usually work on carrier frequencies below 3GHz, and with the emergence of intelligent terminals, especially video services, the current spectrum resources have been difficult to meet the explosive increase of capacity requirements of user terminals. Therefore, a high frequency band having a larger available bandwidth, particularly, a millimeter wave band, is increasingly becoming a candidate band for a next-generation communication system. For example, in the range of 3GHz-200GHz, the potential available bandwidth is about 250 GHz. In addition, modern communication systems generally use multi-antenna technology to improve the capacity and coverage of the system or improve the experience of the user terminal, and the size of the multi-antenna configuration can be greatly reduced by using a high-frequency band, thereby facilitating site acquisition and deployment of more antennas. However, unlike the operating frequency band of the existing LTE system, the use of the high frequency band increases the path loss, and especially the loss of wireless propagation is increased due to the influence of factors such as atmosphere and vegetation.

In order to overcome the propagation loss during high-frequency transmission, a beamforming manner may be used for transmission, and for common channel/signal transmission, in order to implement coverage of all user terminals in a cell, a round-robin beamforming scheme may be used, and at different times in a round of transmission period, a common channel/reference signal is transmitted using different shaped beams, however, when a user terminal position moves, for example, from a position a to a position B, the shaped beam of the common channel/reference signal received by the user terminal may also change, and therefore synchronization of the user terminal needs to be performed again based on the changed shaped beam.

Synchronization of the user terminal is realized by a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) after beamforming, and the PSS and the SSS can support cell search and realize time and frequency Synchronization. In the prior art CA (Carrier Aggregation) and DC (dual connectivity) scenarios, cell-level synchronization information can be tracked and acquired by low frequency synchronization signals (PSS/SSS), while fast beam-level synchronization on high frequency carriers is tracked and acquired by high frequency reference signals. Due to time division cycle of different shaped beams and periodic transmission of PSS/SSS, high-frequency beam synchronization delay is large, and speed is low; in addition, the reference signal for demodulation of the common channel after beamforming is a reference signal distributed in a full bandwidth every subframe, which results in a large overhead of the reference signal for demodulation of the common channel of a plurality of shaped beams.

Disclosure of Invention

The embodiment of the invention provides a method and a device for configuring a reference signal. The technical problem that the overhead of reference signals for demodulating common channels of a plurality of shaped beams is large can be solved.

In a first aspect, an embodiment of the present application provides a method for configuring a reference signal, including:

the reference signals comprise a first type of reference signals and a second type of reference signals in a sending period, and at least one first type of reference signals is sent on a first subframe, wherein at least one first type of reference signal can be signals sent by different ports of a base station, the frequencies of the first type of reference signals sent by different ports are different, the first type of reference signals can be beam-formed reference signals and are used for scanning, finding and identifying beams, the first type of reference signals are placed on subcarrier groups at different frequency domain resource positions, and each first type of reference signal is borne on one subcarrier group, so that the beam-formed first type of reference signals are multiplexed in a frequency division manner, and the frequency division manner can be comb-tooth frequency division;

and then transmitting the second type of reference signal on a second subframe, wherein the second type of reference signal is used for beam identification and beam modification, tracking and the like of a common channel after beam forming, dynamically informing the user terminal of the time domain resource position and/or the frequency domain resource position of the second type of reference signal on the second subframe, and placing the second type of reference signal on the time domain resource position and/or the frequency domain resource position on the first subframe for transmission, thereby not only reducing the pilot overhead of the reference signal, but also realizing the coverage enhancement of the reference signal.

In a possible design, the multiplexing manner of the at least one beamformed first type reference signal may include at least one of time division multiplexing, code division multiplexing, and frequency division multiplexing, which is not limited herein.

In one possible design, the first type of reference signals are transmitted on the first M symbols of the plurality of symbols of the first subframe, where M is a positive integer greater than or equal to 1, so that the first type of reference signals can be quickly identified on the first M symbols, and quick beam tracking based on the first type of reference signals is achieved.

In another possible design, a first subframe carrying at least one first-type reference signal is sent according to a preset period, where the preset period may be an integral multiple of the length of a high-frequency frame, so as to implement frame header determination and synchronous tracking of the high-frequency frame, and the first subframe carrying at least one first-type reference signal may also be sent according to a non-periodic manner.

In another possible design, the second type of reference signal is transmitted in the first Q symbols of the plurality of symbols, so that the second type of reference signal can be quickly identified in the Q symbols, and quick beam tracking based on the second type of reference signal is realized; or transmitting the second type of reference signal on Q symbols after the first M symbols in the plurality of symbols, wherein M, Q are all positive integers greater than or equal to 1.

In another possible design, configuring the time domain resource position of the second type of reference signal according to the time domain resource position information of the data channel to be transmitted; and/or configuring the frequency domain resource position of the second type of reference signal according to the frequency domain resource position information of the data channel to be transmitted, so that the frequency domain resource position of the second type of reference signal is dynamically changed along with the scheduling information, the time frequency resource position of the second type of reference signal is dynamically changed along with the data to be transmitted, and compared with the transmission of high-density reference signals of each subframe and full bandwidth, the overhead of the second type of reference signal is greatly reduced.

In another possible design, the signaling that informs the ue of the time domain resource location and/or the frequency domain resource location of the second type reference signal on the second subframe includes physical layer control signaling (e.g., downlink control information) or higher layer signaling (e.g., RRC radio resource control signaling), and the like, which is not specifically limited herein.

In a second aspect, an embodiment of the present application provides a method for receiving a reference signal, including:

firstly, User Equipment (UE) receives at least one first-class reference signal sent by a base station on a first subframe, wherein the first-class reference signal can be a beamforming reference signal and is used for scanning, discovering and identifying a beam, the first-class reference signal is placed on subcarrier groups at different frequency domain resource positions of the first subframe, and each first-class reference signal is borne on one subcarrier group;

then receiving configuration information of the second type of reference signal sent by the base station, wherein the configuration information includes notification information of a time domain resource position and/or a frequency domain resource position of the second type of reference signal; and finally, receiving the second type of reference signals sent by the base station in a second subframe according to the configuration information of the second type of reference signals, wherein the second type of reference signals are used for beam identification, beam modification, tracking and the like of the common channel after beam forming.

In one possible design, the first subframe includes a plurality of symbols, and the first type of reference signals transmitted by the base station on the first M symbols in the plurality of symbols of the first subframe are received, where M is a positive integer greater than or equal to 1.

In another possible design, the receiving base station receives the first subframe carrying at least one of the first type of reference signal according to a preset period, where the preset period may be an integer multiple of a length of a high frequency frame, or receives the first subframe carrying at least one of the first type of reference signal according to a non-periodic transmission.

In another possible design, reference signals of a second type transmitted by a base station are received on the first Q symbols in a plurality of symbols, wherein Q is a positive integer greater than or equal to 1; or receiving a second-class reference signal sent by the base station on Q symbols after the first M symbols in the plurality of symbols, wherein Q and M are positive integers greater than or equal to 1.

In another possible design, the time domain and/or frequency domain resource location information of the reference signal of the second type, which is notified by the base station through physical layer control signaling or higher layer signaling, is received.

In a third aspect, an embodiment of the present application provides a method for configuring a reference signal, including:

the first-class reference signals are used for scanning, discovering and identifying beams and simultaneously used for indicating the time domain resource position and the frequency domain resource position of a control channel so as to control the demodulation of the channel, the second-class reference signals are used for quickly tracking the beams under a high-frequency carrier and demodulating the control channel, the first-class reference signals are placed on subcarrier groups at different frequency domain resource positions, and each first-class reference signal is borne on one subcarrier group, so that the beamformed first-class reference signals are multiplexed in a comb-tooth frequency division manner.

In addition, the first type of reference signal carries resource position indication information; and indicating the frequency domain resource position and/or the time domain resource position of a control channel or the second type of reference signal according to the resource position indication information. The time domain resource position and/or the frequency domain resource position of the second type of reference signal are only located in the time frequency resource region of the control channel, or the time domain resource position and/or the frequency domain resource position of the second type of reference signal are associated with the time domain and/or the frequency domain resource of the control channel, so that the second type of reference signal can be used as a demodulation reference signal of the control channel, and compared with the transmission of a high-density reference signal with each subframe and full bandwidth, the overhead of the second type of reference signal is also reduced.

In a possible design, the multiplexing manner of the beamformed first type of reference signals may include at least one of time division multiplexing, code division multiplexing, and frequency division multiplexing, which is not limited herein.

In one possible design, the first type of reference signal is sent on the first R symbols of the plurality of symbols, the second type of reference signal is sent on the S symbols after the first R symbols, and S, R are positive integers greater than or equal to 1, so that the first type of reference signal can be quickly identified on the front symbol of each subframe, and quick beam tracking on a high-frequency carrier can be further realized.

In another possible design, the first type of reference signal carries resource location indication information of S symbols.

In another possible design, the first type of reference signal and the second type of reference signal are sent on the same subframe according to a preset period, or the first type of reference signal and the second type of reference signal are sent on the same subframe according to a non-period, or the first type of reference signal is sent according to a preset period and the second type of reference signal is sent according to a non-period.

In a fourth aspect, an embodiment of the present application provides a method for receiving a reference signal, including:

firstly, receiving a first type of reference signal and a second type of reference signal which are sent on the same subframe by a base station, wherein the first type of reference signal is placed on subcarrier groups at different frequency domain resource positions of the same subframe, and each first type of reference signal is borne on one subcarrier group; then, according to the resource position indication information carried by the first type of reference signals, determining the frequency domain resource position and/or the time domain resource position of the second type of reference signals; and finally, receiving the second type of reference signals sent by the base station at the frequency domain resource position and/or the time domain resource position indicated by the resource position indication information.

In one possible design, the subframe includes a plurality of symbols, and the first type of reference signals transmitted by the receiving base station on the first R symbols of the plurality of symbols and the second type of reference signals transmitted on the S symbols after the first R symbols are all positive integers greater than or equal to 1, S, R.

In another possible design, a first type of reference signal and a second type of reference signal that are transmitted by a base station on the same subframe according to a preset period are received.

In a fifth aspect, an embodiment of the present application provides a base station, where the apparatus is configured to implement the method and the functions performed by the first aspect, and the apparatus is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.

In a sixth aspect, an embodiment of the present application provides a user equipment, where the apparatus is configured to implement the method and the functions performed in the second aspect, and the apparatus is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.

In a seventh aspect, an embodiment of the present invention provides a base station, where the apparatus is configured to implement the method and the function performed in the third aspect, and the apparatus is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.

In an eighth aspect, an embodiment of the present invention provides a user equipment, where the apparatus is configured to implement the method and the functions performed in the fourth aspect, and the apparatus is implemented by hardware/software, where the hardware/software includes units corresponding to the functions.

In a ninth aspect, embodiments of the present application provide an apparatus, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the communication bus is used for realizing connection communication among the processor, the communication interface and the memory, and the processor executes a program stored in the memory for realizing the steps in the methods executed by the first, second, third and fourth aspects.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a reference signal configuration method according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a reference signal according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a reference signal configuration method according to a second embodiment of the present invention;

FIG. 5 is a schematic diagram of another reference signal structure provided by an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for receiving a reference signal according to a third embodiment of the present invention;

fig. 7 is a flowchart illustrating a method for receiving a reference signal according to a fourth embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another base station according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of another user equipment provided in an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a reference signal configuration apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention, where the communication system includes a base station and a user equipment, where the base station is a sending device and the user equipment is a receiving device.

Referring to fig. 2, fig. 2 is a flowchart illustrating a reference signal configuration method according to a first embodiment of the present invention. As shown in the figure, the method in the embodiment of the present invention includes:

s201, a base station transmits at least one first type of reference signal on a first subframe, where the first type of reference signal is placed on subcarrier groups at different frequency resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group, where at least one first type of reference signal may be a signal transmitted by different ports of the base station, and frequencies of the first type of reference signals transmitted by different ports are different.

It should be noted that, in a CA (Carrier Aggregation) scenario, since cross-Carrier scheduling may be configured for transmission, a high-frequency control Channel may be placed on a low-frequency Carrier for transmission, and other common channels, such as a PBCH (Physical Broadcast Channel), a PDCCH (Enhanced-Physical downlink control Channel), a PCFICH (Physical format indicator Channel), a PHICH (Physical Hybrid ARQ indicator Channel), and the like, may also be placed on the low-frequency Carrier for transmission. Therefore, in the CA scenario and supporting cross-carrier scheduling, the high-frequency carrier only needs to complete fast synchronization of the beam level, where the main role of the reference signal is beam tracking of the high-frequency signal and synchronization of the high-frequency frame. The embodiment of the present invention defines two types of Reference signals, where the Reference Signal includes a first type of Reference Signal and a second type of Reference Signal in a transmission period, the first type of Reference Signal is a Cell-specific full-bandwidth Reference Signal visible to all user equipments and used for scanning, finding, and identifying a beam, and the second type of Reference Signal may be a Cell-specific or user equipment-specific Reference Signal, such as CRS (Cell-specific Reference Signal) or DMRS (modulation Reference Signal), or CSI-RS (Channel State Information-Reference Signal) used for beam identification and beam correction, tracking, and the like of a common Channel after a beam.

In a specific implementation, a plurality of subcarriers are distributed on different frequency domain resource positions of the first subframe, the plurality of subcarriers can form a subcarrier group, if one subcarrier carries a first type of reference signal, the overhead of the frequency domain resource is increased, so that each first type of reference signal is carried on one subcarrier group, and the beamformed first type of reference signal is multiplexed in a frequency division comb manner, thereby reducing the pilot overhead of the first type of reference signal.

Optionally, the first subframe includes a plurality of symbols, and the first type of reference signal may be sent on the first M symbols in the plurality of symbols of the first subframe, so that the first type of reference signal may be quickly identified on the first M symbols, and fast beam tracking on a high-frequency carrier is implemented, or the second type of reference signal is sent on M symbols after the first Q symbols in the plurality of symbols, where M and Q are both positive integers greater than or equal to 1.

Optionally, the first subframe carrying the first type of reference signal may be sent according to a preset period, where the preset period may be an integral multiple of a length of a high-frequency frame, so as to implement frame header determination and synchronous tracking on a high-frequency carrier, and the first type of reference signal may also be sent according to a non-periodic time.

S202, the base station sends the second type of reference signal on a second subframe, and informs a user terminal of a time domain resource position and/or a frequency domain resource position of the second type of reference signal on the second subframe, wherein the second type of reference signal is placed on the time domain resource position and/or the frequency domain resource position on the second subframe.

In a specific implementation, the second subframe includes a plurality of symbols, and the second-type reference signal may be sent on Q symbols after the first M symbols in the plurality of symbols; the reference signals of the second type may also be transmitted on the first Q symbols of the plurality of symbols, M, Q being a positive integer greater than or equal to 1.

Optionally, the time domain resource position of the second type of reference signal may be configured according to the time domain resource position information of the data channel to be transmitted, and/or the frequency domain resource position of the second type of reference signal may be configured according to the frequency domain resource position information of the data channel to be transmitted, so that the frequency domain resource position of the second type of reference signal dynamically changes along with the scheduling information. The time-frequency resource position of the second type of reference signal is dynamically changed along with the data to be transmitted, and compared with the transmission of high-density reference signals of each subframe and full bandwidth, the overhead of the second type of reference signal is greatly reduced. The signaling for notifying the time domain resource location and/or the frequency domain resource location of the second type of reference signal includes a physical layer control signaling (e.g., downlink control information) or a higher layer signaling (e.g., RRC radio resource control signaling), and the like, which is not limited specifically herein.

The data Channel may be a PDSCH (Physical Downlink Shared Channel) or a PUSCH (Physical Uplink Shared Channel), and is not limited herein. The scheduling information may include at least one of a transmission format of the data channel, a resource allocation indication, an uplink scheduling grant, power control, and uplink retransmission information, etc.

As shown in fig. 3, frequency domain resources are from top to bottom, time domain resources are from left to right, a plurality of subcarrier groups (including a plurality of subcarriers) are sequentially arranged on a first subframe from top to bottom, each subcarrier group occupies a different frequency domain resource position, first type reference signals specific to a cell are arranged on first M symbols of the first subframe, each circle represents a reference signal under beamforming, and each first type reference signal occupies one subcarrier group, so that the beamformed first type reference signals are multiplexed in a frequency division manner, optionally, the frequency division manner may be comb frequency division, thereby reducing pilot overhead of the first type reference signals. The first type of reference signal may be sent on a first subframe according to a preset period, a last subframe in fig. 2 is another first subframe sent after the preset period ends, a frame structure of the first subframe is the same as that of the first subframe, and a plurality of second subframes are sent successively in a time interval between the first subframe and the last subframe, where the second subframes include a second type of reference signal (only appearing on a scheduling subband of the user equipment 1) on the scheduling subband of the user equipment 1 and a second type of reference signal (only appearing on a scheduling subband of the user equipment 2) on the scheduling subband of the user equipment 2, and reference signals (circles) on the scheduling subbands of each user equipment are different, so as to implement coverage enhancement and beam round robin of the reference signals.

In the embodiment of the invention, at least one first-class reference signal is firstly sent on a first subframe, the first-class reference signals are placed on subcarrier groups at different frequency domain resource positions, and each first-class reference signal is carried in one subcarrier group; and then, sending a second type of reference signal on a second subframe, informing the user terminal of the time domain and/or frequency domain resource position of the second type of reference signal on the first subframe, and sending the second type of reference signal on the time domain and/or frequency domain resource position, thereby not only reducing the pilot frequency overhead of the reference signal, but also realizing the rapid tracking of beam level synchronization on a high-frequency carrier.

Referring to fig. 4, fig. 4 is a flowchart illustrating a reference signal configuration method according to a second embodiment of the present invention. As shown in the figure, the method in the embodiment of the present invention includes:

s401, a base station sends the first type of reference signal and the second type of reference signal on the same subframe, the first type of reference signal is placed on subcarrier groups on different frequency domain resource positions of the same subframe, each first type of reference signal is carried on one subcarrier group, and the first type of reference signal carries resource position indication information.

It should be noted that, because the DC (dual Connection) scenario does not support cross-carrier scheduling, the high-frequency control channel can only be placed on the high-frequency carrier for transmission, and further, in the DC scenario, the high-frequency carrier needs to complete fast synchronization of a beam level and complete demodulation of the control channel at the same time, where the main functions of the reference signal are beam tracking of a signal on the high-frequency carrier, frame synchronization on the high-frequency wave, and demodulation of the control channel. The embodiment of the present invention defines two types of reference signals, including a first type of reference signal and a second type of reference signal, where the first type of reference signal is a cell-specific full-bandwidth reference signal, visible to all user equipments, and is used for scanning, discovering, and identifying beams, and simultaneously indicating a time domain resource location and/or a frequency domain resource location of a control channel and/or the second type of reference signal, such as: indicating the time domain symbol number of the control channel in one subframe and/or indicating the frequency domain position of the control channel in the system bandwidth, carrying resource position indication information on the first type of reference signal, and the user equipment can acquire the time domain resource position and/or the frequency domain resource position of the corresponding control channel through detecting the first type of reference signal. The second type of Reference Signal may be a Cell-specific or ue-specific Reference Signal, such as CRS (Cell-specific Reference Signal), or DMRS (demodulation Reference Signal), or CSI-RS (Channel State Information-Reference Signal), which is limited in the frequency domain resource position and time domain resource position of the control Channel indicated by the resource position indication Information, that is, the time domain resource position and/or frequency domain resource position Information of the control Channel is used for the second type of Reference Signal, and the second type of Reference Signal is used for fast beam tracking on the high frequency carrier and demodulation of the control Channel.

Optionally, the first type of reference signal may be sent on the first R symbols of the multiple symbols, and the second type of reference signal may be sent on the S symbols after the first R symbols, where the first type of reference signal carries resource location indication information of the S symbols, and both S and R are positive integers greater than or equal to 1, so as to implement fast identification of the first type of reference signal on the first R symbols, and after identifying the first type of reference signal, fast identification of the second type of reference signal, and further implement fast beam tracking on a high-frequency carrier and demodulation of a control channel.

Optionally, the first type of reference signal and the second type of reference signal on the same subframe may be sent according to a preset period, the first type of reference signal and the second type of reference signal on the same subframe may also be sent according to a non-period, the first type of reference signal may also be sent according to a preset period, and the second type of reference signal may also be sent according to a non-period.

S402, the base station indicates the frequency domain resource position and/or the time domain resource position of the second type of reference signal according to the resource position indication information.

As shown in fig. 5, frequency domain resources are provided from top to bottom, time domain resources are provided from left to right, a plurality of subcarrier groups (including a plurality of subcarriers) are sequentially placed on a subframe from top to bottom, each subcarrier group occupies different frequency domain resource positions, first type reference signals specific to a cell are provided on first M symbols of a first subframe, each symbol represents a reference signal under beamforming, and each first type reference signal occupies one subcarrier group, so that the beamformed first type reference signals are multiplexed in a frequency division manner, optionally, the frequency division manner may be comb frequency division, thereby reducing pilot overhead of the first type reference signals. Meanwhile, the subframe also comprises a second type of reference signal (indicating a symbol in a frame), the first type of reference signal carries resource position indication information, the resource position indication information indicates a frequency domain resource position and a time domain resource position of the control channel and/or the second type of reference signal, and the second type of reference signal is limited in the frequency domain resource position and the time domain resource position of the control channel indicated by the resource position indication information, so that fast beam tracking on the high-frequency carrier and demodulation of the control channel are realized.

In the embodiment of the invention, a first type of reference signal and a second type of reference signal are sent on the same subframe, the first type of reference signal is placed on subcarrier groups on different frequency domain resource positions of the same subframe, each first type of reference signal is carried on one subcarrier group, and the first type of reference signal carries resource position indication information; and the frequency domain resource position and/or the time domain resource position of the control channel and/or the second type reference signal are/is indicated according to the resource position indication information, so that the pilot frequency overhead is reduced, and the fast beam tracking on the high-frequency carrier and the demodulation of the control channel are realized.

Referring to fig. 6, fig. 6 is a flowchart illustrating a method for receiving a reference signal according to a third embodiment of the present invention. As shown in the figure, the method in the embodiment of the present invention includes:

s601, a user equipment receives at least one first type of reference signal sent by a base station on a first subframe, the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group.

Optionally, the first type of reference signals sent by the base station on the first M symbols in the plurality of symbols of the first subframe may be received, where M is a positive integer greater than or equal to 1.

Optionally, the first subframe carrying the first type of reference signal and sent by the base station according to a preset period may be received.

S602, the ue receives configuration information of the second type of reference signal sent by the base station, where the configuration information includes a notification message of a time domain resource location and/or a frequency domain resource location of the second type of reference signal on a second subframe.

Optionally, the second type reference signal sent by the base station may be received on the first Q symbols in the plurality of symbols, where Q is a positive integer greater than or equal to 1; or the second-class reference signal sent by the base station may be received on Q symbols after the first M symbols, where Q and M are both positive integers greater than or equal to 1.

S603, the UE receives the second-class reference signal sent by the base station in the second subframe according to the configuration information of the second-class reference signal.

It should be noted that the receiving method of the reference signal in the embodiment of the present invention corresponds to the configuration method of the reference signal shown in fig. 2, and the user equipment may receive the reference signal sent by the base station according to the configuration information of the reference signal of the base station shown in fig. 2, which is not described again in the embodiment of the present invention.

Referring to fig. 7, fig. 7 is a flowchart illustrating a method for receiving a reference signal according to a fourth embodiment of the present invention. As shown in the figure, the method in the embodiment of the present invention includes:

s701, user equipment receives a first type of reference signal and a second type of reference signal sent by a base station on the same subframe, the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the same subframe, and each first type of reference signal is carried on one subcarrier group.

Optionally, the first type of reference signals sent by the base station on the first R symbols of the multiple symbols and the second type of reference signals sent on S symbols after the first R symbols may be received, where S and R are positive integers greater than or equal to 1.

Optionally, the first type of reference signal carries resource location indication information of the S symbols.

Optionally, the first type of reference signal and the second type of reference signal sent by the base station on the same subframe according to a preset period are received.

S702, the user equipment determines the frequency domain resource position and/or the time domain resource position of the second type of reference signal according to the resource position indication information carried by the first type of reference signal.

S703, the ue receives the second-type reference signal sent by the base station at the frequency domain resource location and/or the time domain resource location indicated by the resource location indication information.

It should be noted that the receiving method of the reference signal in the embodiment of the present invention corresponds to the reference signal configuration method shown in fig. 4, and the user equipment may receive the reference signal sent by the base station according to the configuration information of the reference signal of the base station shown in fig. 4, which is not described again in the embodiment of the present invention.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in the figure, the apparatus in the embodiment of the present invention includes a first sending module 801 and a second sending module 802, where the first sending module 801 and the second sending module 802 are configured to perform the method described in the method embodiment shown in fig. 2.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in the figure, the apparatus in the embodiment of the present invention includes a sending module 901 and an indication module 902, where the sending module 901 and the indication module 902 are configured to execute the method described in the method embodiment shown in fig. 4.

Referring to fig. 10, fig. 10 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown, the apparatus in the embodiment of the present invention includes a receiving module, where the receiving module is configured to execute the method described in the method embodiment shown in fig. 6.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown, the apparatus in the embodiment of the present invention includes a receiving module 1101 and a determining module 1102, where the receiving module 1101 and the determining module 1102 are configured to perform the method described in the method embodiment shown in fig. 7.

Please refer to fig. 12, fig. 12 is a schematic structural diagram of a reference signal allocating apparatus according to the present invention. As shown, the apparatus may include: at least one processor 1201, e.g., a CPU, at least one communication interface 1202, at least one memory 1203 and at least one communication bus 1204. Wherein a communication bus 1204 is used to enable connective communication between these components. The communication interface 1202 of the apparatus in the embodiment of the present invention is used for performing signaling or data communication with other node devices. The memory 1203 may be a high-speed RAM memory or a non-volatile memory (e.g., at least one disk memory). The memory 1203 may optionally also be at least one storage device located remotely from the aforementioned processor 1201. The apparatus in fig. 12 may be the base station shown in fig. 8 or fig. 9, or the user equipment shown in fig. 10 or fig. 11, a set of program codes is stored in the memory 1203, and the processor 1201 executes the program stored in the memory 1203, performs the methods executed by the base station and the user equipment, or implements the functions implemented by the base station and the user equipment.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art will recognize that the present invention is not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: flash Memory disks, Read-Only memories (ROMs), Random Access Memories (RAMs), magnetic or optical disks, and the like.

The content downloading method, the related device and the system provided by the embodiment of the present invention are described in detail above, and a specific example is applied in the text to explain the principle and the embodiment of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for configuring a reference signal, wherein the reference signal includes a first type of reference signal and a second type of reference signal in a transmission period, the method comprising:

a base station sends at least one first type of reference signal on a first subframe, the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group;

the base station sends the second type of reference signal on a second subframe, and notifies a user terminal of the time domain resource position and/or the frequency domain resource position of the second type of reference signal on the second subframe, including: configuring the time domain resource position of the second type of reference signal according to the time domain resource position information of the data channel to be transmitted; and/or configuring the frequency domain resource position of the second type of reference signal according to the frequency domain resource position information of the data channel to be transmitted, wherein the second type of reference signal is placed on the time domain resource position and/or the frequency domain resource position on the second subframe.

2. The method of claim 1, wherein the first subframe comprises a plurality of symbols, and wherein transmitting at least one reference signal of the first type over the first subframe comprises:

transmitting the first type of reference signal on the first M symbols of the plurality of symbols of the first subframe, M being a positive integer greater than or equal to 1.

3. The method of claim 1, wherein the transmitting at least one of the first type of reference signals on a first subframe comprises:

and sending the first subframe carrying at least one first type of reference signal according to a preset period.

4. The method of any of claims 1-3, wherein the second subframe comprises a plurality of symbols, and wherein transmitting the reference signals of the second type over the second subframe comprises:

transmitting the second type of reference signal on the first Q symbols of the plurality of symbols, wherein Q is a positive integer greater than or equal to 1; or

And transmitting the second type of reference signal on Q symbols after the first M symbols in the plurality of symbols, wherein both M and Q are positive integers which are more than or equal to 1.

5. A method for receiving a reference signal, wherein the reference signal includes a first type of reference signal and a second type of reference signal in a transmission period, the method comprising:

the method comprises the steps that user equipment receives at least one first type of reference signal sent by a base station on a first subframe, the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group;

the user equipment receives configuration information of the second type of reference signal sent by the base station, wherein the configuration information comprises notification information of a time domain resource position and/or a frequency domain resource position of the second type of reference signal on a second subframe, and the time domain resource position of the second type of reference signal is configured according to time domain resource position information of a data channel to be transmitted; or/and the frequency domain resource position of the second type of reference signal is configured according to the frequency domain resource position information of the data channel to be transmitted;

and the user equipment receives the second type of reference signals sent by the base station on the second subframe according to the configuration information of the second type of reference signals.

6. The method of claim 5, wherein the first subframe comprises a plurality of symbols, and wherein the receiving at least one reference signal of the first type transmitted by the base station on the first subframe comprises:

receiving the first type of reference signals transmitted by the base station on the first M symbols in the plurality of symbols of the first subframe, wherein M is a positive integer greater than or equal to 1.

7. The method of claim 5, wherein the receiving at least one of the first type of reference signals transmitted by the base station on a first subframe comprises:

and receiving the first subframe which is sent by the base station according to a preset period and carries at least one first type of reference signal.

8. The method of any of claims 5-7, wherein the second subframe comprises a plurality of symbols, and wherein the receiving the reference signals of the second type transmitted by the base station in the second subframe comprises:

receiving the second type reference signals transmitted by the base station on the first Q symbols in the plurality of symbols, wherein Q is a positive integer greater than or equal to 1; or

And receiving the second-class reference signal sent by the base station on Q symbols after the first M symbols, wherein Q and M are positive integers greater than or equal to 1.

9. A method for configuring a reference signal, wherein the reference signal includes a first type of reference signal and a second type of reference signal in a transmission period, the method comprising:

a base station sends a first type of reference signal and a second type of reference signal on the same subframe, wherein the first type of reference signal is placed on subcarrier groups at different frequency domain resource positions of the same subframe, each first type of reference signal is carried on one subcarrier group, and the first type of reference signal carries resource position indication information;

and the base station indicates the frequency domain resource position and/or the time domain resource position of the second type of reference signal according to the resource position indication information, the time domain resource position and/or the frequency domain resource position of the second type of reference signal are/is located in the time frequency resource region of the control channel, or the time domain resource position and/or the frequency domain resource position of the second type of reference signal are/is associated with the time domain and/or the frequency domain resource of the control channel.

10. The method of claim 9, wherein the subframe comprises a plurality of symbols, and wherein transmitting the first type of reference signal and the second type of reference signal on the same subframe comprises:

and transmitting the first type of reference signal on the first R symbols of the plurality of symbols, and transmitting the second type of reference signal on the S symbols after the first R symbols, wherein S and R are positive integers greater than or equal to 1.

11. The method of claim 10, wherein the first type of reference signal carries resource location indication information of the S symbols.

12. The method of any of claims 9-11, wherein the transmitting the first type of reference signal and the second type of reference signal on the same subframe comprises:

and transmitting the first type of reference signal and the second type of reference signal on the same subframe according to a preset period.

13. A method for receiving a reference signal, wherein the reference signal includes a first type of reference signal and a second type of reference signal in a transmission period, the method comprising:

the method comprises the steps that user equipment receives a first type of reference signal and a second type of reference signal which are sent by a base station on the same subframe, the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the same subframe, and each first type of reference signal is carried on one subcarrier group;

the user equipment determines the frequency domain resource position and/or the time domain resource position of the second type of reference signal according to the resource position indication information carried by the first type of reference signal;

the ue receives the second type of reference signal sent by the base station at the frequency domain resource location and/or the time domain resource location indicated by the resource location indication information, where the time domain resource location and/or the frequency domain resource location of the second type of reference signal are located in the time-frequency resource region of the control channel, or the time domain resource location and/or the frequency domain resource location of the second type of reference signal are associated with the time domain and/or the frequency domain resource of the control channel.

14. The method of claim 13, wherein the subframe comprises a plurality of symbols, and wherein receiving the first type of reference signal and the second type of reference signal transmitted by the base station on the same subframe comprises:

receiving the first type of reference signals sent by the base station on the first R symbols of the plurality of symbols and the second type of reference signals sent on the S symbols after the first R symbols, wherein both S and R are positive integers greater than or equal to 1.

15. The method of claim 14, wherein the first type of reference signal carries resource location indication information of the S symbols.

16. The method of any of claims 13-15, wherein the receiving the first type of reference signals and the second type of reference signals transmitted by the base station on the same subframe comprises:

and receiving the first type of reference signals and the second type of reference signals which are sent on the same subframe by the base station according to a preset period.

17. A base station, wherein a reference signal comprises a first type of reference signal and a second type of reference signal in a transmission period, the apparatus comprising:

a first sending module, configured to send at least one first type of reference signal on a first subframe, where the first type of reference signal is placed on subcarrier groups of different frequency domain resource locations of the first subframe, and each first type of reference signal is carried on one subcarrier group;

a second sending module, configured to send the second type of reference signal on a second subframe, and notify a user equipment of a time domain resource location and/or a frequency domain resource location of the second type of reference signal on the second subframe, where the second sending module is configured to: configuring the time domain resource position of the second type of reference signal according to the time domain resource position information of the data channel to be transmitted; and/or configuring the frequency domain resource position of the second type of reference signal according to the frequency domain resource position information of the data channel to be transmitted, wherein the second type of reference signal is placed on the time domain resource position and/or the frequency domain resource position on the second subframe.

18. The base station of claim 17, wherein the first subframe comprises a plurality of symbols, and wherein the first transmit module is further configured to:

19. The base station of claim 17, wherein the first transmit module is specifically configured to:

20. The base station of claim 17, wherein the second subframe comprises a plurality of symbols, and wherein the second transmitting module is further configured to:

21. A user equipment, wherein a reference signal comprises a first type of reference signal and a second type of reference signal in a transmission period, the method comprising:

a receiving module, configured to receive at least one first type of reference signal sent by a base station on a first subframe, where the first type of reference signal is placed on subcarrier groups in different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group;

the receiving module is further configured to receive configuration information of the second type of reference signal sent by the base station, where the configuration information includes a notification message of a time domain resource location and/or a frequency domain resource location of the second type of reference signal on a second subframe, and the time domain resource location of the second type of reference signal is configured according to time domain resource location information of a data channel to be transmitted; or/and the frequency domain resource position of the second type of reference signal is configured according to the frequency domain resource position information of the data channel to be transmitted;

the receiving module is further configured to receive the second type of reference signal sent by the base station in the second subframe according to the configuration information of the second type of reference signal.

22. The user equipment of claim 21, wherein the first subframe comprises a plurality of symbols, and wherein the receiving module is further configured to:

23. The user equipment of claim 21, wherein the receiving module is specifically configured to:

24. The user equipment according to any of claims 21-23, wherein the receiving module is specifically configured to:

25. A base station, wherein a reference signal comprises a first type of reference signal and a second type of reference signal in a transmission period, the apparatus comprising:

a sending module, configured to send the first type of reference signal and the second type of reference signal on a same subframe, where the first type of reference signal is placed on subcarrier groups at different frequency domain resource locations of the same subframe, each of the first type of reference signals is carried on one of the subcarrier groups, and the first type of reference signal carries resource location indication information;

and an indicating module, configured to indicate a frequency domain resource location and/or a time domain resource location of the second type of reference signal according to the resource location indication information, where the time domain resource location and/or the frequency domain resource location of the second type of reference signal are located in a time-frequency resource region of the control channel, or the time domain resource location and/or the frequency domain resource location of the second type of reference signal are associated with a time domain and/or a frequency domain resource of the control channel.

26. The base station of claim 25, wherein the subframe comprises a plurality of symbols, and wherein the transmitting module is further configured to:

27. The base station of claim 26, wherein the first type of reference signal carries resource location indication information for the S symbols.

28. The base station of any one of claims 25 to 27, wherein the sending module is specifically configured to:

29. A user equipment, wherein a reference signal comprises a first type of reference signal and a second type of reference signal in a transmission period, the user equipment comprising:

a receiving module, configured to receive the first type of reference signal and the second type of reference signal sent by a base station on a same subframe, where the first type of reference signal is placed on subcarrier groups at different frequency domain resource positions of the same subframe, and each first type of reference signal is carried on one subcarrier group;

a determining module, configured to determine a frequency domain resource location and/or a time domain resource location of the second type of reference signal according to resource location indication information carried by the first type of reference signal, where the time domain resource location and/or the frequency domain resource location of the second type of reference signal are located in a time-frequency resource region of the control channel, or the time domain resource location and/or the frequency domain resource location of the second type of reference signal are associated with a time domain resource and/or a frequency domain resource of the control channel;

the receiving module is further configured to receive the second type of reference signal sent by the base station in the frequency domain resource location and/or the time domain resource location indicated by the resource location indication information.

30. The user equipment of claim 29, wherein the subframe comprises a plurality of symbols, and wherein the receiving module is further configured to:

31. The UE of claim 30, wherein the first type of reference signals carry resource location indication information of the S symbols.

32. The user equipment according to any of claims 29-31, wherein the receiving module is specifically configured to:

33. An apparatus for configuring a reference signal, wherein the reference signal comprises a first reference signal and a second type of reference signal in a transmission period, the apparatus comprising a communication interface, a memory, and a processor, wherein the memory stores a set of program codes, and the processor is configured to call the program codes stored in the memory to perform the following operations:

transmitting at least one first type of reference signal on a first subframe, wherein the first type of reference signal is placed on subcarrier groups of different frequency domain resource positions of the first subframe, and each first type of reference signal is carried on one subcarrier group;

transmitting the second type of reference signal on a second subframe, and notifying the time domain resource location and/or the frequency domain resource location of the second type of reference signal on the second subframe, including: configuring the time domain resource position of the second type of reference signal according to the time domain resource position information of the data channel to be transmitted; and/or configuring the frequency domain resource position of the second type of reference signal according to the frequency domain resource position information of the data channel to be transmitted, wherein the second type of reference signal is placed on the time domain resource position and/or the frequency domain resource position on the second subframe.

34. The apparatus of claim 33, wherein the processor is further configured to:

35. The apparatus of claim 34, wherein the processor is further configured to:

36. The apparatus of claim 33, wherein the processor is further configured to: